1c609719bSwdenk# 2eca3aeb3SWolfgang Denk# (C) Copyright 2000 - 2013 3c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4c609719bSwdenk# 5eca3aeb3SWolfgang Denk# SPDX-License-Identifier: GPL-2.0+ 6c609719bSwdenk# 7c609719bSwdenk 8c609719bSwdenkSummary: 9c609719bSwdenk======== 10c609719bSwdenk 1124ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 12e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 13e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 14e86e5a07Swdenkinitialize and test the hardware or to download and run application 15e86e5a07Swdenkcode. 16c609719bSwdenk 17c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 1824ee89b9Swdenkthe source code originate in the Linux source tree, we have some 1924ee89b9Swdenkheader files in common, and special provision has been made to 20c609719bSwdenksupport booting of Linux images. 21c609719bSwdenk 22c609719bSwdenkSome attention has been paid to make this software easily 23c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 24c609719bSwdenkimplemented with the same call interface, so that it's very easy to 25c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 26c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 27c609719bSwdenkload and run it dynamically. 28c609719bSwdenk 29c609719bSwdenk 30c609719bSwdenkStatus: 31c609719bSwdenk======= 32c609719bSwdenk 33c609719bSwdenkIn general, all boards for which a configuration option exists in the 34c609719bSwdenkMakefile have been tested to some extent and can be considered 35c609719bSwdenk"working". In fact, many of them are used in production systems. 36c609719bSwdenk 37c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 3827af930eSAlbert ARIBAUDwho contributed the specific port. The boards.cfg file lists board 39218ca724SWolfgang Denkmaintainers. 40c609719bSwdenk 41adb9d851SRobert P. J. DayNote: There is no CHANGELOG file in the actual U-Boot source tree; 42adb9d851SRobert P. J. Dayit can be created dynamically from the Git log using: 43adb9d851SRobert P. J. Day 44adb9d851SRobert P. J. Day make CHANGELOG 45adb9d851SRobert P. J. Day 46c609719bSwdenk 47c609719bSwdenkWhere to get help: 48c609719bSwdenk================== 49c609719bSwdenk 50c609719bSwdenkIn case you have questions about, problems with or contributions for 51c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 520c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 530c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 540c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 550c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 56c609719bSwdenk 57c609719bSwdenk 58218ca724SWolfgang DenkWhere to get source code: 59218ca724SWolfgang Denk========================= 60218ca724SWolfgang Denk 61218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 62218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 63218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 64218ca724SWolfgang Denk 65218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 6611ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 67218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 68218ca724SWolfgang Denkdirectory. 69218ca724SWolfgang Denk 70d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 71218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 72218ca724SWolfgang Denk 73218ca724SWolfgang Denk 74c609719bSwdenkWhere we come from: 75c609719bSwdenk=================== 76c609719bSwdenk 77c609719bSwdenk- start from 8xxrom sources 7824ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 79c609719bSwdenk- clean up code 80c609719bSwdenk- make it easier to add custom boards 81c609719bSwdenk- make it possible to add other [PowerPC] CPUs 82c609719bSwdenk- extend functions, especially: 83c609719bSwdenk * Provide extended interface to Linux boot loader 84c609719bSwdenk * S-Record download 85c609719bSwdenk * network boot 8611ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 8724ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 88c609719bSwdenk- add other CPU families (starting with ARM) 8924ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 900d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 9124ee89b9Swdenk 9224ee89b9Swdenk 9324ee89b9SwdenkNames and Spelling: 9424ee89b9Swdenk=================== 9524ee89b9Swdenk 9624ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 9724ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 9824ee89b9Swdenkin source files etc.). Example: 9924ee89b9Swdenk 10024ee89b9Swdenk This is the README file for the U-Boot project. 10124ee89b9Swdenk 10224ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 10324ee89b9Swdenk 10424ee89b9Swdenk include/asm-ppc/u-boot.h 10524ee89b9Swdenk 10624ee89b9Swdenk #include <asm/u-boot.h> 10724ee89b9Swdenk 10824ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 10924ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 11024ee89b9Swdenk 11124ee89b9Swdenk U_BOOT_VERSION u_boot_logo 11224ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 113c609719bSwdenk 114c609719bSwdenk 11593f19cc0SwdenkVersioning: 11693f19cc0Swdenk=========== 11793f19cc0Swdenk 118360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 119360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 120360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 121360d883aSThomas Webernames consisting of the calendar year and month of the release date. 122360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 123360d883aSThomas Weberreleases in "stable" maintenance trees. 12493f19cc0Swdenk 125360d883aSThomas WeberExamples: 126360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 127360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 128360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 12993f19cc0Swdenk 13093f19cc0Swdenk 131c609719bSwdenkDirectory Hierarchy: 132c609719bSwdenk==================== 133c609719bSwdenk 1348d321b81SPeter Tyser/arch Architecture specific files 1356eae68e4SMasahiro Yamada /arc Files generic to ARC architecture 1366eae68e4SMasahiro Yamada /cpu CPU specific files 1376eae68e4SMasahiro Yamada /arc700 Files specific to ARC 700 CPUs 1386eae68e4SMasahiro Yamada /lib Architecture specific library files 1398d321b81SPeter Tyser /arm Files generic to ARM architecture 1408d321b81SPeter Tyser /cpu CPU specific files 1418d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1428d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1436eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1448d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1458d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1468d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1478d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1488d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1498d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1508d321b81SPeter Tyser /lib Architecture specific library files 1518d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1528d321b81SPeter Tyser /cpu CPU specific files 1538d321b81SPeter Tyser /lib Architecture specific library files 1548d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1558d321b81SPeter Tyser /cpu CPU specific files 1568d321b81SPeter Tyser /lib Architecture specific library files 1578d321b81SPeter Tyser /m68k Files generic to m68k architecture 1588d321b81SPeter Tyser /cpu CPU specific files 1598d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1608d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1618d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1628d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1638d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1648d321b81SPeter Tyser /lib Architecture specific library files 1658d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1668d321b81SPeter Tyser /cpu CPU specific files 1678d321b81SPeter Tyser /lib Architecture specific library files 1688d321b81SPeter Tyser /mips Files generic to MIPS architecture 1698d321b81SPeter Tyser /cpu CPU specific files 17092bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 1716eae68e4SMasahiro Yamada /mips64 Files specific to MIPS64 CPUs 1728d321b81SPeter Tyser /lib Architecture specific library files 173afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 174afc1ce82SMacpaul Lin /cpu CPU specific files 175afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 176afc1ce82SMacpaul Lin /lib Architecture specific library files 1778d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1788d321b81SPeter Tyser /cpu CPU specific files 1798d321b81SPeter Tyser /lib Architecture specific library files 18033c7731bSRobert P. J. Day /openrisc Files generic to OpenRISC architecture 18133c7731bSRobert P. J. Day /cpu CPU specific files 18233c7731bSRobert P. J. Day /lib Architecture specific library files 183a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1848d321b81SPeter Tyser /cpu CPU specific files 1858d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1868d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1878d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1888d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1898d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 1908d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 1918d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 1928d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 1938d321b81SPeter Tyser /lib Architecture specific library files 1948d321b81SPeter Tyser /sh Files generic to SH architecture 1958d321b81SPeter Tyser /cpu CPU specific files 1968d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 1978d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 1988d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 1998d321b81SPeter Tyser /lib Architecture specific library files 2008d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2018d321b81SPeter Tyser /cpu CPU specific files 2028d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2038d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2048d321b81SPeter Tyser /lib Architecture specific library files 20533c7731bSRobert P. J. Day /x86 Files generic to x86 architecture 20633c7731bSRobert P. J. Day /cpu CPU specific files 20733c7731bSRobert P. J. Day /lib Architecture specific library files 2088d321b81SPeter Tyser/api Machine/arch independent API for external apps 2098d321b81SPeter Tyser/board Board dependent files 2108d321b81SPeter Tyser/common Misc architecture independent functions 2118d321b81SPeter Tyser/disk Code for disk drive partition handling 2128d321b81SPeter Tyser/doc Documentation (don't expect too much) 2138d321b81SPeter Tyser/drivers Commonly used device drivers 21433c7731bSRobert P. J. Day/dts Contains Makefile for building internal U-Boot fdt. 2158d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2168d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2178d321b81SPeter Tyser/include Header Files 2188d321b81SPeter Tyser/lib Files generic to all architectures 2198d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2208d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2218d321b81SPeter Tyser /lzo Library files to support LZO decompression 2228d321b81SPeter Tyser/net Networking code 2238d321b81SPeter Tyser/post Power On Self Test 22433c7731bSRobert P. J. Day/spl Secondary Program Loader framework 2258d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 226c609719bSwdenk 227c609719bSwdenkSoftware Configuration: 228c609719bSwdenk======================= 229c609719bSwdenk 230c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 231c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 232c609719bSwdenk 233c609719bSwdenkThere are two classes of configuration variables: 234c609719bSwdenk 235c609719bSwdenk* Configuration _OPTIONS_: 236c609719bSwdenk These are selectable by the user and have names beginning with 237c609719bSwdenk "CONFIG_". 238c609719bSwdenk 239c609719bSwdenk* Configuration _SETTINGS_: 240c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 241c609719bSwdenk you don't know what you're doing; they have names beginning with 2426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 243c609719bSwdenk 244c609719bSwdenkLater we will add a configuration tool - probably similar to or even 245c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 246c609719bSwdenkdo the configuration by hand, which means creating some symbolic 247c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 248c609719bSwdenkas an example here. 249c609719bSwdenk 250c609719bSwdenk 251c609719bSwdenkSelection of Processor Architecture and Board Type: 252c609719bSwdenk--------------------------------------------------- 253c609719bSwdenk 254c609719bSwdenkFor all supported boards there are ready-to-use default 255ab584d67SHolger Freytherconfigurations available; just type "make <board_name>_defconfig". 256c609719bSwdenk 257c609719bSwdenkExample: For a TQM823L module type: 258c609719bSwdenk 259c609719bSwdenk cd u-boot 260ab584d67SHolger Freyther make TQM823L_defconfig 261c609719bSwdenk 26211ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 263ab584d67SHolger Freythere.g. "make cogent_mpc8xx_defconfig". And also configure the cogent 264c609719bSwdenkdirectory according to the instructions in cogent/README. 265c609719bSwdenk 266c609719bSwdenk 26775b3c3aaSSimon GlassSandbox Environment: 26875b3c3aaSSimon Glass-------------------- 26975b3c3aaSSimon Glass 27075b3c3aaSSimon GlassU-Boot can be built natively to run on a Linux host using the 'sandbox' 27175b3c3aaSSimon Glassboard. This allows feature development which is not board- or architecture- 27275b3c3aaSSimon Glassspecific to be undertaken on a native platform. The sandbox is also used to 27375b3c3aaSSimon Glassrun some of U-Boot's tests. 27475b3c3aaSSimon Glass 2756b1978f8SJagannadha Sutradharudu TekiSee board/sandbox/README.sandbox for more details. 27675b3c3aaSSimon Glass 27775b3c3aaSSimon Glass 278c609719bSwdenkConfiguration Options: 279c609719bSwdenk---------------------- 280c609719bSwdenk 281c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 282c609719bSwdenksuch information is kept in a configuration file 283c609719bSwdenk"include/configs/<board_name>.h". 284c609719bSwdenk 285c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 286c609719bSwdenk"include/configs/TQM823L.h". 287c609719bSwdenk 288c609719bSwdenk 2897f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2907f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2917f6c2cbcSwdenkbuild a config tool - later. 2927f6c2cbcSwdenk 2937f6c2cbcSwdenk 294c609719bSwdenkThe following options need to be configured: 295c609719bSwdenk 2962628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 297c609719bSwdenk 2982628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2996ccec449SWolfgang Denk 3006ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 30109ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 302c609719bSwdenk 303c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 304c609719bSwdenk Define exactly one of 305c609719bSwdenk CONFIG_CMA286_60_OLD 306c609719bSwdenk--- FIXME --- not tested yet: 307c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 308c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 309c609719bSwdenk 310c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 311c609719bSwdenk Define exactly one of 312c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 313c609719bSwdenk 314c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 315c609719bSwdenk Define one or more of 316c609719bSwdenk CONFIG_CMA302 317c609719bSwdenk 318c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 319c609719bSwdenk Define one or more of 320c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 32111ccc33fSMarcel Ziswiler the LCD display every second with 322c609719bSwdenk a "rotator" |\-/|\-/ 323c609719bSwdenk 324cf946c6dSLei Wen- Marvell Family Member 325cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 326cf946c6dSLei Wen multiple fs option at one time 327cf946c6dSLei Wen for marvell soc family 328cf946c6dSLei Wen 329c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 330c609719bSwdenk Define exactly one of 331c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 332c609719bSwdenk 33311ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 33466ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 33566ca92a5Swdenk get_gclk_freq() cannot work 3365da627a4Swdenk e.g. if there is no 32KHz 3375da627a4Swdenk reference PIT/RTC clock 33866ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 33966ca92a5Swdenk or XTAL/EXTAL) 340c609719bSwdenk 34166ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 34466ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 34575d1ea7fSwdenk See doc/README.MPC866 34675d1ea7fSwdenk 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 34875d1ea7fSwdenk 34975d1ea7fSwdenk Define this to measure the actual CPU clock instead 35075d1ea7fSwdenk of relying on the correctness of the configured 35175d1ea7fSwdenk values. Mostly useful for board bringup to make sure 35275d1ea7fSwdenk the PLL is locked at the intended frequency. Note 35375d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 35575d1ea7fSwdenk 356506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 357506f3918SHeiko Schocher 358506f3918SHeiko Schocher Define this option if you want to enable the 359506f3918SHeiko Schocher ICache only when Code runs from RAM. 360506f3918SHeiko Schocher 36166412c63SKumar Gala- 85xx CPU Options: 362ffd06e02SYork Sun CONFIG_SYS_PPC64 363ffd06e02SYork Sun 364ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 365ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 366ffd06e02SYork Sun compliance, among other possible reasons. 367ffd06e02SYork Sun 36866412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36966412c63SKumar Gala 37066412c63SKumar Gala Defines the core time base clock divider ratio compared to the 37166412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 37266412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37366412c63SKumar Gala 3748f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3758f29084aSKumar Gala 3768f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3778f29084aSKumar Gala tree nodes for the given platform. 3788f29084aSKumar Gala 379afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 380afa6b551SPrabhakar Kushwaha 381afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 382afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 383afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 384afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 385afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 386afa6b551SPrabhakar Kushwaha purpose. 387afa6b551SPrabhakar Kushwaha 38833eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 38933eee330SScott Wood 39033eee330SScott Wood Enables a workaround for erratum A004510. If set, 39133eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 39233eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 39333eee330SScott Wood 39433eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 39533eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 39633eee330SScott Wood 39733eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 39833eee330SScott Wood for which the A004510 workaround should be applied. 39933eee330SScott Wood 40033eee330SScott Wood The rest of SVR is either not relevant to the decision 40133eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 40233eee330SScott Wood p2041) or is implied by the build target, which controls 40333eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 40433eee330SScott Wood 40533eee330SScott Wood See Freescale App Note 4493 for more information about 40633eee330SScott Wood this erratum. 40733eee330SScott Wood 40874fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 40974fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 41074fa22edSPrabhakar Kushwaha requred during NOR boot. 41174fa22edSPrabhakar Kushwaha 41233eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 41333eee330SScott Wood 41433eee330SScott Wood This is the value to write into CCSR offset 0x18600 41533eee330SScott Wood according to the A004510 workaround. 41633eee330SScott Wood 41764501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 41864501c66SPriyanka Jain This value denotes start offset of DDR memory which is 41964501c66SPriyanka Jain connected exclusively to the DSP cores. 42064501c66SPriyanka Jain 421765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 422765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 423765b0bdbSPriyanka Jain which is directly connected to the DSP core. 424765b0bdbSPriyanka Jain 42564501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 42664501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 42764501c66SPriyanka Jain connected to the DSP core. 42864501c66SPriyanka Jain 429765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 430765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 431765b0bdbSPriyanka Jain 432b135991aSPriyanka Jain CONFIG_SYS_FSL_SINGLE_SOURCE_CLK 433b135991aSPriyanka Jain Single Source Clock is clocking mode present in some of FSL SoC's. 434b135991aSPriyanka Jain In this mode, a single differential clock is used to supply 435b135991aSPriyanka Jain clocks to the sysclock, ddrclock and usbclock. 436b135991aSPriyanka Jain 437fb4a2409SAneesh Bansal CONFIG_SYS_CPC_REINIT_F 438fb4a2409SAneesh Bansal This CONFIG is defined when the CPC is configured as SRAM at the 439fb4a2409SAneesh Bansal time of U-boot entry and is required to be re-initialized. 440fb4a2409SAneesh Bansal 441aade2004STang Yuantian CONFIG_DEEP_SLEEP 442aade2004STang Yuantian Inidcates this SoC supports deep sleep feature. If deep sleep is 443aade2004STang Yuantian supported, core will start to execute uboot when wakes up. 444aade2004STang Yuantian 4456cb461b4SDaniel Schwierzeck- Generic CPU options: 4462a1680e3SYork Sun CONFIG_SYS_GENERIC_GLOBAL_DATA 4472a1680e3SYork Sun Defines global data is initialized in generic board board_init_f(). 4482a1680e3SYork Sun If this macro is defined, global data is created and cleared in 4492a1680e3SYork Sun generic board board_init_f(). Without this macro, architecture/board 4502a1680e3SYork Sun should initialize global data before calling board_init_f(). 4512a1680e3SYork Sun 4526cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4536cb461b4SDaniel Schwierzeck 4546cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4556cb461b4SDaniel Schwierzeck values is arch specific. 4566cb461b4SDaniel Schwierzeck 4575614e71bSYork Sun CONFIG_SYS_FSL_DDR 4585614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4595614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4605614e71bSYork Sun SoCs. 4615614e71bSYork Sun 4625614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4635614e71bSYork Sun Freescale DDR memory-mapped register base. 4645614e71bSYork Sun 4655614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4665614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4675614e71bSYork Sun deskew training are not available. 4685614e71bSYork Sun 4695614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4705614e71bSYork Sun Freescale DDR1 controller. 4715614e71bSYork Sun 4725614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4735614e71bSYork Sun Freescale DDR2 controller. 4745614e71bSYork Sun 4755614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4765614e71bSYork Sun Freescale DDR3 controller. 4775614e71bSYork Sun 47834e026f9SYork Sun CONFIG_SYS_FSL_DDRC_GEN4 47934e026f9SYork Sun Freescale DDR4 controller. 48034e026f9SYork Sun 4819ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4829ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4839ac4ffbdSYork Sun 4845614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4855614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4865614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4875614e71bSYork Sun implemetation. 4885614e71bSYork Sun 4895614e71bSYork Sun CONFIG_SYS_FSL_DDR2 4905614e71bSYork Sun Board config to use DDR2. It can be eanbeld for SoCs with 4915614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 4925614e71bSYork Sun implementation. 4935614e71bSYork Sun 4945614e71bSYork Sun CONFIG_SYS_FSL_DDR3 4955614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 49634e026f9SYork Sun Freescale DDR3 or DDR3L controllers. 49734e026f9SYork Sun 49834e026f9SYork Sun CONFIG_SYS_FSL_DDR3L 49934e026f9SYork Sun Board config to use DDR3L. It can be enabled for SoCs with 50034e026f9SYork Sun DDR3L controllers. 50134e026f9SYork Sun 50234e026f9SYork Sun CONFIG_SYS_FSL_DDR4 50334e026f9SYork Sun Board config to use DDR4. It can be enabled for SoCs with 50434e026f9SYork Sun DDR4 controllers. 5055614e71bSYork Sun 5061b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 5071b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 5081b4175d6SPrabhakar Kushwaha 5091b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 5101b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 5111b4175d6SPrabhakar Kushwaha 512690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 513690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 514690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 515690e4258SPrabhakar Kushwaha 516690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 517690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 518690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 519690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 520690e4258SPrabhakar Kushwaha 52189ad7be8SPrabhakar Kushwaha CONFIG_SPL_FSL_PBL 52289ad7be8SPrabhakar Kushwaha It adds a target to create boot binary having SPL binary in PBI format 52389ad7be8SPrabhakar Kushwaha concatenated with u-boot binary. 52489ad7be8SPrabhakar Kushwaha 5254e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 5264e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 5274e5b1bd0SYork Sun 5284e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 5294e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 5304e5b1bd0SYork Sun 5316b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 5326b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 5336b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 5346b9e309aSYork Sun it could be different for ARM SoCs. 5356b9e309aSYork Sun 5366b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5376b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5386b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5396b1e1254SYork Sun SoCs with ARM core. 5406b1e1254SYork Sun 5411d71efbbSYork Sun CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS 5421d71efbbSYork Sun Number of controllers used as main memory. 5431d71efbbSYork Sun 5441d71efbbSYork Sun CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS 5451d71efbbSYork Sun Number of controllers used for other than main memory. 5461d71efbbSYork Sun 547028dbb8dSRuchika Gupta CONFIG_SYS_FSL_SEC_BE 548028dbb8dSRuchika Gupta Defines the SEC controller register space as Big Endian 549028dbb8dSRuchika Gupta 550028dbb8dSRuchika Gupta CONFIG_SYS_FSL_SEC_LE 551028dbb8dSRuchika Gupta Defines the SEC controller register space as Little Endian 552028dbb8dSRuchika Gupta 5530b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5550b953ffcSMarkus Klotzbuecher 5560b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5570b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5580b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5590b953ffcSMarkus Klotzbuecher 5606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5610b953ffcSMarkus Klotzbuecher 5620b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5630b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5640b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5650b953ffcSMarkus Klotzbuecher by this value. 5660b953ffcSMarkus Klotzbuecher 56792bbd64eSDaniel Schwierzeck- MIPS CPU options: 56892bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 56992bbd64eSDaniel Schwierzeck 57092bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 57192bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 57292bbd64eSDaniel Schwierzeck relocation. 57392bbd64eSDaniel Schwierzeck 57492bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 57592bbd64eSDaniel Schwierzeck 57692bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 57792bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 57892bbd64eSDaniel Schwierzeck Possible values are: 57992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 58092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 58192bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 58292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 58392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 58492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 58592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 58692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 58792bbd64eSDaniel Schwierzeck 58892bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 58992bbd64eSDaniel Schwierzeck 59092bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 59192bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 59292bbd64eSDaniel Schwierzeck 59392bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 59492bbd64eSDaniel Schwierzeck 59592bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 59692bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 59792bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 59892bbd64eSDaniel Schwierzeck 599b67d8816SChristian Riesch- ARM options: 600b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 601b67d8816SChristian Riesch 602b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 603b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 604b67d8816SChristian Riesch 6055356f545SAneesh V CONFIG_SYS_THUMB_BUILD 6065356f545SAneesh V 6075356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 6085356f545SAneesh V set for ARM architectures. Thumb instruction set provides 6095356f545SAneesh V better code density. For ARM architectures that support 6105356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 6115356f545SAneesh V GCC. 6125356f545SAneesh V 613c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 6140678587fSStephen Warren CONFIG_ARM_ERRATA_742230 6150678587fSStephen Warren CONFIG_ARM_ERRATA_743622 6160678587fSStephen Warren CONFIG_ARM_ERRATA_751472 617f71cbfe3SNitin Garg CONFIG_ARM_ERRATA_794072 618b7588e3bSNitin Garg CONFIG_ARM_ERRATA_761320 6190678587fSStephen Warren 6200678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 6210678587fSStephen Warren during U-Boot startup. Note that these options force the 6220678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 6230678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 6240678587fSStephen Warren set these options unless they apply! 6250678587fSStephen Warren 6265da627a4Swdenk- Linux Kernel Interface: 627c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 628c609719bSwdenk 629c609719bSwdenk U-Boot stores all clock information in Hz 630c609719bSwdenk internally. For binary compatibility with older Linux 631c609719bSwdenk kernels (which expect the clocks passed in the 632c609719bSwdenk bd_info data to be in MHz) the environment variable 633c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 634c609719bSwdenk converts clock data to MHZ before passing it to the 635c609719bSwdenk Linux kernel. 636c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 637c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 638c609719bSwdenk default environment. 639c609719bSwdenk 6405da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6415da627a4Swdenk 64211ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6435da627a4Swdenk expect it to be in bytes, others in MB. 6445da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6455da627a4Swdenk 646fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 647f57f70aaSWolfgang Denk 648f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 649213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 650213bf8c8SGerald Van Baren concepts). 651213bf8c8SGerald Van Baren 652213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 653213bf8c8SGerald Van Baren * New libfdt-based support 654213bf8c8SGerald Van Baren * Adds the "fdt" command 6553bb342fcSKim Phillips * The bootm command automatically updates the fdt 656213bf8c8SGerald Van Baren 657b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 658b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 659b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 660b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 661f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 662c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 663f57f70aaSWolfgang Denk 66411ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 66511ccc33fSMarcel Ziswiler addresses 6663bb342fcSKim Phillips 6674e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6684e253137SKumar Gala 6694e253137SKumar Gala Board code has addition modification that it wants to make 6704e253137SKumar Gala to the flat device tree before handing it off to the kernel 6716705d81eSwdenk 672*c654b517SSimon Glass CONFIG_OF_SYSTEM_SETUP 673*c654b517SSimon Glass 674*c654b517SSimon Glass Other code has addition modification that it wants to make 675*c654b517SSimon Glass to the flat device tree before handing it off to the kernel. 676*c654b517SSimon Glass This causes ft_system_setup() to be called before booting 677*c654b517SSimon Glass the kernel. 678*c654b517SSimon Glass 6790267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6800267768eSMatthew McClintock 68111ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6820267768eSMatthew McClintock param header, the default value is zero if undefined. 6830267768eSMatthew McClintock 6843887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6853887c3fbSHeiko Schocher 6863887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6873887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6883887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6893887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6903887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6913887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6923887c3fbSHeiko Schocher 6937eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6947eb29398SIgor Grinberg 6957eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6967eb29398SIgor Grinberg machine type and must be used to specify the machine type 6977eb29398SIgor Grinberg number as it appears in the ARM machine registry 6987eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6997eb29398SIgor Grinberg Only boards that have multiple machine types supported 7007eb29398SIgor Grinberg in a single configuration file and the machine type is 7017eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 7027eb29398SIgor Grinberg 7030b2f4ecaSNiklaus Giger- vxWorks boot parameters: 7040b2f4ecaSNiklaus Giger 7050b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 7060b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 7070b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 7080b2f4ecaSNiklaus Giger 7090b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 7100b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 7110b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 7120b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 7130b2f4ecaSNiklaus Giger 7140b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 7150b2f4ecaSNiklaus Giger 7160b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 7170b2f4ecaSNiklaus Giger 7180b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 7190b2f4ecaSNiklaus Giger the defaults discussed just above. 7200b2f4ecaSNiklaus Giger 7212c451f78SAneesh V- Cache Configuration: 7222c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 7232c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 7242c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 7252c451f78SAneesh V 72693bc2193SAneesh V- Cache Configuration for ARM: 72793bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 72893bc2193SAneesh V controller 72993bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 73093bc2193SAneesh V controller register space 73193bc2193SAneesh V 7326705d81eSwdenk- Serial Ports: 73348d0192fSAndreas Engel CONFIG_PL010_SERIAL 7346705d81eSwdenk 7356705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 7366705d81eSwdenk 73748d0192fSAndreas Engel CONFIG_PL011_SERIAL 7386705d81eSwdenk 7396705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 7406705d81eSwdenk 7416705d81eSwdenk CONFIG_PL011_CLOCK 7426705d81eSwdenk 7436705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 7446705d81eSwdenk the clock speed of the UARTs. 7456705d81eSwdenk 7466705d81eSwdenk CONFIG_PL01x_PORTS 7476705d81eSwdenk 7486705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 7496705d81eSwdenk define this to a list of base addresses for each (supported) 7506705d81eSwdenk port. See e.g. include/configs/versatile.h 7516705d81eSwdenk 752910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 753910f1ae3SJohn Rigby 754910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 755910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 756910f1ae3SJohn Rigby this variable to initialize the extra register. 757910f1ae3SJohn Rigby 758910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 759910f1ae3SJohn Rigby 760910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 761910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 762910f1ae3SJohn Rigby variable to flush the UART at init time. 763910f1ae3SJohn Rigby 764d57dee57SKaricheri, Muralidharan CONFIG_SERIAL_HW_FLOW_CONTROL 765d57dee57SKaricheri, Muralidharan 766d57dee57SKaricheri, Muralidharan Define this variable to enable hw flow control in serial driver. 767d57dee57SKaricheri, Muralidharan Current user of this option is drivers/serial/nsl16550.c driver 7686705d81eSwdenk 769c609719bSwdenk- Console Interface: 770c609719bSwdenk Depending on board, define exactly one serial port 771c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 772c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 773c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 774c609719bSwdenk 775c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 776c609719bSwdenk port routines must be defined elsewhere 777c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 778c609719bSwdenk 779c609719bSwdenk CONFIG_CFB_CONSOLE 780c609719bSwdenk Enables console device for a color framebuffer. Needs following 781c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 782c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 783c609719bSwdenk (default big endian) 784c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 785c609719bSwdenk rectangle fill 786c609719bSwdenk (cf. smiLynxEM) 787c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 788c609719bSwdenk bit-blit (cf. smiLynxEM) 789c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 790c609719bSwdenk (cols=pitch) 791c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 792c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 793c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 794c609719bSwdenk (0-5, cf. cfb_console.c) 795c609719bSwdenk VIDEO_FB_ADRS framebuffer address 796c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 797c609719bSwdenk (i.e. i8042_kbd_init()) 798c609719bSwdenk VIDEO_TSTC_FCT test char fct 799c609719bSwdenk (i.e. i8042_tstc) 800c609719bSwdenk VIDEO_GETC_FCT get char fct 801c609719bSwdenk (i.e. i8042_getc) 802c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 803c609719bSwdenk (requires blink timer 804c609719bSwdenk cf. i8042.c) 8056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 806c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 807c609719bSwdenk upper right corner 808602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 809c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 810c609719bSwdenk upper left corner 811a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 812a6c7ad2fSwdenk linux_logo.h for logo. 813a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 814c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 81511ccc33fSMarcel Ziswiler additional board info beside 816c609719bSwdenk the logo 817c609719bSwdenk 81833a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 81933a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 82033a35bbbSPali Rohár erase functions and limited graphics rendition control). 82133a35bbbSPali Rohár 822c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 823c609719bSwdenk default i/o. Serial console can be forced with 824c609719bSwdenk environment 'console=serial'. 825c609719bSwdenk 826a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 827a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 828a3ad8e26Swdenk the "silent" environment variable. See 829a3ad8e26Swdenk doc/README.silent for more information. 830a3ad8e26Swdenk 83145ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 83245ae2546SHeiko Schocher is 0x00. 83345ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 83445ae2546SHeiko Schocher is 0xa0. 83545ae2546SHeiko Schocher 836c609719bSwdenk- Console Baudrate: 837c609719bSwdenk CONFIG_BAUDRATE - in bps 838c609719bSwdenk Select one of the baudrates listed in 8396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 8406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 841c609719bSwdenk 842c92fac91SHeiko Schocher- Console Rx buffer length 843c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 844c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 8452b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 846c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 847c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 848c92fac91SHeiko Schocher the SMC. 849c92fac91SHeiko Schocher 8509558b48aSGraeme Russ- Pre-Console Buffer: 8519558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 8529558b48aSGraeme Russ initialised etc) all console output is silently discarded. 8539558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8549558b48aSGraeme Russ buffer any console messages prior to the console being 8559558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8569558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8579558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8589558b48aSGraeme Russ bytes are output before the console is initialised, the 8599558b48aSGraeme Russ earlier bytes are discarded. 8609558b48aSGraeme Russ 8619558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8629558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8639558b48aSGraeme Russ 864046a37bdSSonny Rao- Safe printf() functions 865046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 866046a37bdSSonny Rao the printf() functions. These are defined in 867046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 868046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 869046a37bdSSonny Rao If this option is not given then these functions will 870046a37bdSSonny Rao silently discard their buffer size argument - this means 871046a37bdSSonny Rao you are not getting any overflow checking in this case. 872046a37bdSSonny Rao 873c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 874c609719bSwdenk Delay before automatically booting the default image; 875c609719bSwdenk set to -1 to disable autoboot. 87693d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 87793d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 878c609719bSwdenk 879c609719bSwdenk See doc/README.autoboot for these options that 880c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 881c609719bSwdenk CONFIG_BOOT_RETRY_TIME 882c609719bSwdenk CONFIG_BOOT_RETRY_MIN 883c609719bSwdenk CONFIG_AUTOBOOT_KEYED 884c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 885c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 886c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 887c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 888c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 889c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 890c609719bSwdenk CONFIG_RESET_TO_RETRY 891c609719bSwdenk 892c609719bSwdenk- Autoboot Command: 893c609719bSwdenk CONFIG_BOOTCOMMAND 894c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 895c609719bSwdenk define a command string that is automatically executed 896c609719bSwdenk when no character is read on the console interface 897c609719bSwdenk within "Boot Delay" after reset. 898c609719bSwdenk 899c609719bSwdenk CONFIG_BOOTARGS 900c609719bSwdenk This can be used to pass arguments to the bootm 901c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 902c609719bSwdenk environment value "bootargs". 903c609719bSwdenk 904c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 905c609719bSwdenk The value of these goes into the environment as 906c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 907c609719bSwdenk as a convenience, when switching between booting from 90811ccc33fSMarcel Ziswiler RAM and NFS. 909c609719bSwdenk 910eda0ba38SHeiko Schocher- Bootcount: 911eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 912eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 913eda0ba38SHeiko Schocher cycle, see: 914eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 915eda0ba38SHeiko Schocher 916eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 917eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 918eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 919eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 920eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 921eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 922eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 923eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 924eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 925eda0ba38SHeiko Schocher 926c609719bSwdenk- Pre-Boot Commands: 927c609719bSwdenk CONFIG_PREBOOT 928c609719bSwdenk 929c609719bSwdenk When this option is #defined, the existence of the 930c609719bSwdenk environment variable "preboot" will be checked 931c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 932c609719bSwdenk countdown and/or running the auto-boot command resp. 933c609719bSwdenk entering interactive mode. 934c609719bSwdenk 935c609719bSwdenk This feature is especially useful when "preboot" is 936c609719bSwdenk automatically generated or modified. For an example 937c609719bSwdenk see the LWMON board specific code: here "preboot" is 938c609719bSwdenk modified when the user holds down a certain 939c609719bSwdenk combination of keys on the (special) keyboard when 940c609719bSwdenk booting the systems 941c609719bSwdenk 942c609719bSwdenk- Serial Download Echo Mode: 943c609719bSwdenk CONFIG_LOADS_ECHO 944c609719bSwdenk If defined to 1, all characters received during a 945c609719bSwdenk serial download (using the "loads" command) are 946c609719bSwdenk echoed back. This might be needed by some terminal 947c609719bSwdenk emulations (like "cu"), but may as well just take 948c609719bSwdenk time on others. This setting #define's the initial 949c609719bSwdenk value of the "loads_echo" environment variable. 950c609719bSwdenk 951602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 952c609719bSwdenk CONFIG_KGDB_BAUDRATE 953c609719bSwdenk Select one of the baudrates listed in 9546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 955c609719bSwdenk 956c609719bSwdenk- Monitor Functions: 957602ad3b3SJon Loeliger Monitor commands can be included or excluded 958602ad3b3SJon Loeliger from the build by using the #include files 959c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 960c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 961602ad3b3SJon Loeliger and augmenting with additional #define's 962602ad3b3SJon Loeliger for wanted commands. 963c609719bSwdenk 964602ad3b3SJon Loeliger The default command configuration includes all commands 965602ad3b3SJon Loeliger except those marked below with a "*". 966602ad3b3SJon Loeliger 967b401b73dSMarek Vasut CONFIG_CMD_AES AES 128 CBC encrypt/decrypt 968602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 969602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 970602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 971602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 972602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 973602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 974d2b2ffe3STom Rini CONFIG_CMD_BOOTI * ARM64 Linux kernel Image support 975602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 97608d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 977602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 978710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 979602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 980602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 981602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 982a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 983a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 984a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 985a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 986602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 987602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 988246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 989602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 990602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9915e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 992fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 99388733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9940c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 99503e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 99603e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 99716f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 99816f4d933SStephen Warren that work for multiple fs types 999bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 1000602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 100103e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 1002602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 1003602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 10044d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 100553fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 1006a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 1007a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 1008bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 1009602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 1010602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 1011602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 1012602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 10138fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 10144d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 1015602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 1016aa53233aSSimon Glass CONFIG_CMD_IOTRACE * I/O tracing for debugging 10170c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 1018c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 1019602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 1020602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 1021602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 1022602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 10234d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 1024d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 1025d22c338eSJoe Hershberger (169.254.*.*) 1026602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 1027602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 10284d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 102902c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 103015a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1031602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1032a2681707SWolfgang Denk loop, loopw 10334d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1034602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1035602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1036602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 103768d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1038602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1039602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10404d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1041e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1042e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1043602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1044602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1045602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1046602ad3b3SJon Loeliger host 1047602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1048ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1049602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1050602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1051d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1052602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1053602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1054602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1055602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1056602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1057602ad3b3SJon Loeliger (4xx only) 1058f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10594d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 106002c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10617d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 106274de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1063602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10647a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10651fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1066da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1067da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1068602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1069602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1070c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10714d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 107289c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1073c609719bSwdenk 1074c609719bSwdenk EXAMPLE: If you want all functions except of network 1075c609719bSwdenk support you can write: 1076c609719bSwdenk 1077602ad3b3SJon Loeliger #include "config_cmd_all.h" 1078602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1079c609719bSwdenk 1080213bf8c8SGerald Van Baren Other Commands: 1081213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1082c609719bSwdenk 1083c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1084602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1085c609719bSwdenk what you (and your U-Boot users) are doing. Data 1086c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1087c609719bSwdenk 8260 (where accesses to the IMMR region must be 1088c609719bSwdenk uncached), and it cannot be disabled on all other 1089c609719bSwdenk systems where we (mis-) use the data cache to hold an 1090c609719bSwdenk initial stack and some data. 1091c609719bSwdenk 1092c609719bSwdenk 1093c609719bSwdenk XXX - this list needs to get updated! 1094c609719bSwdenk 1095a5ecbe62SWolfgang Denk- Regular expression support: 1096a5ecbe62SWolfgang Denk CONFIG_REGEX 1097a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1098a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1099a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1100a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1101a5ecbe62SWolfgang Denk 110245ba8077SSimon Glass- Device tree: 110345ba8077SSimon Glass CONFIG_OF_CONTROL 110445ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 110545ba8077SSimon Glass to configure its devices, instead of relying on statically 110645ba8077SSimon Glass compiled #defines in the board file. This option is 110745ba8077SSimon Glass experimental and only available on a few boards. The device 110845ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 110945ba8077SSimon Glass 11102c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 11112c0f79e4SSimon Glass be done using one of the two options below: 1112bbb0b128SSimon Glass 1113bbb0b128SSimon Glass CONFIG_OF_EMBED 1114bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1115bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1116bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1117bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1118bbb0b128SSimon Glass the global data structure as gd->blob. 111945ba8077SSimon Glass 11202c0f79e4SSimon Glass CONFIG_OF_SEPARATE 11212c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 11222c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 11232c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 11242c0f79e4SSimon Glass 11252c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 11262c0f79e4SSimon Glass 11272c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 11282c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 11292c0f79e4SSimon Glass still use the individual files if you need something more 11302c0f79e4SSimon Glass exotic. 11312c0f79e4SSimon Glass 1132c609719bSwdenk- Watchdog: 1133c609719bSwdenk CONFIG_WATCHDOG 1134c609719bSwdenk If this variable is defined, it enables watchdog 11356abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11366abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11376abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11386abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11396abe6fb6SDetlev Zundel available, then no further board specific code should 11406abe6fb6SDetlev Zundel be needed to use it. 11416abe6fb6SDetlev Zundel 11426abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11436abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11446abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11456abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1146c609719bSwdenk 1147c1551ea8Sstroese- U-Boot Version: 1148c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1149c1551ea8Sstroese If this variable is defined, an environment variable 1150c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1151c1551ea8Sstroese version as printed by the "version" command. 1152a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1153a1ea8e51SBenoît Thébaudeau next reset. 1154c1551ea8Sstroese 1155c609719bSwdenk- Real-Time Clock: 1156c609719bSwdenk 1157602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1158c609719bSwdenk has to be selected, too. Define exactly one of the 1159c609719bSwdenk following options: 1160c609719bSwdenk 1161c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1162c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11634e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1164c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11651cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1166c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11677f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 1168412921d2SMarkus Niebel CONFIG_RTC_DS1339 - use Maxim, Inc. DS1339 RTC 11693bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11709536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11714c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 117371d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 117471d19f30SHeiko Schocher RV3029 RTC. 1175c609719bSwdenk 1176b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1177b37c7e5eSwdenk must also be configured. See I2C Support, below. 1178b37c7e5eSwdenk 1179e92739d3SPeter Tyser- GPIO Support: 1180e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1181e92739d3SPeter Tyser 11825dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11835dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11845dec49caSChris Packham pins supported by a particular chip. 11855dec49caSChris Packham 1186e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1187e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1188e92739d3SPeter Tyser 1189aa53233aSSimon Glass- I/O tracing: 1190aa53233aSSimon Glass When CONFIG_IO_TRACE is selected, U-Boot intercepts all I/O 1191aa53233aSSimon Glass accesses and can checksum them or write a list of them out 1192aa53233aSSimon Glass to memory. See the 'iotrace' command for details. This is 1193aa53233aSSimon Glass useful for testing device drivers since it can confirm that 1194aa53233aSSimon Glass the driver behaves the same way before and after a code 1195aa53233aSSimon Glass change. Currently this is supported on sandbox and arm. To 1196aa53233aSSimon Glass add support for your architecture, add '#include <iotrace.h>' 1197aa53233aSSimon Glass to the bottom of arch/<arch>/include/asm/io.h and test. 1198aa53233aSSimon Glass 1199aa53233aSSimon Glass Example output from the 'iotrace stats' command is below. 1200aa53233aSSimon Glass Note that if the trace buffer is exhausted, the checksum will 1201aa53233aSSimon Glass still continue to operate. 1202aa53233aSSimon Glass 1203aa53233aSSimon Glass iotrace is enabled 1204aa53233aSSimon Glass Start: 10000000 (buffer start address) 1205aa53233aSSimon Glass Size: 00010000 (buffer size) 1206aa53233aSSimon Glass Offset: 00000120 (current buffer offset) 1207aa53233aSSimon Glass Output: 10000120 (start + offset) 1208aa53233aSSimon Glass Count: 00000018 (number of trace records) 1209aa53233aSSimon Glass CRC32: 9526fb66 (CRC32 of all trace records) 1210aa53233aSSimon Glass 1211c609719bSwdenk- Timestamp Support: 1212c609719bSwdenk 1213c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1214c609719bSwdenk (date and time) of an image is printed by image 1215c609719bSwdenk commands like bootm or iminfo. This option is 1216602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1217c609719bSwdenk 1218923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1219923c46f9SKarl O. Pinc Zero or more of the following: 1220923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1221923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1222923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1223923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1224923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1225923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1226923c46f9SKarl O. Pinc disk/part_efi.c 1227923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1228c609719bSwdenk 1229602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1230218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1231923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1232c609719bSwdenk 1233c609719bSwdenk- IDE Reset method: 12344d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 12354d13cbadSwdenk board configurations files but used nowhere! 1236c609719bSwdenk 12374d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 12384d13cbadSwdenk be performed by calling the function 12394d13cbadSwdenk ide_set_reset(int reset) 12404d13cbadSwdenk which has to be defined in a board specific file 1241c609719bSwdenk 1242c609719bSwdenk- ATAPI Support: 1243c609719bSwdenk CONFIG_ATAPI 1244c609719bSwdenk 1245c609719bSwdenk Set this to enable ATAPI support. 1246c609719bSwdenk 1247c40b2956Swdenk- LBA48 Support 1248c40b2956Swdenk CONFIG_LBA48 1249c40b2956Swdenk 1250c40b2956Swdenk Set this to enable support for disks larger than 137GB 12514b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1252c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1253c40b2956Swdenk support disks up to 2.1TB. 1254c40b2956Swdenk 12556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1256c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1257c40b2956Swdenk Default is 32bit. 1258c40b2956Swdenk 1259c609719bSwdenk- SCSI Support: 1260c609719bSwdenk At the moment only there is only support for the 1261c609719bSwdenk SYM53C8XX SCSI controller; define 1262c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1263c609719bSwdenk 12646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1267c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1268c609719bSwdenk devices. 12696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1270c609719bSwdenk 1271447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1272447c031bSStefan Reinauer SCSI devices found during the last scan. 1273447c031bSStefan Reinauer 1274c609719bSwdenk- NETWORK Support (PCI): 1275682011ffSwdenk CONFIG_E1000 1276ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1277ce5207e1SKyle Moffett 1278ce5207e1SKyle Moffett CONFIG_E1000_SPI 1279ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1280ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1281ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1282ce5207e1SKyle Moffett 1283ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1284ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1285ce5207e1SKyle Moffett example with the "sspi" command. 1286ce5207e1SKyle Moffett 1287ce5207e1SKyle Moffett CONFIG_CMD_E1000 1288ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1289ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1290682011ffSwdenk 1291ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 129211ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1293ac3315c2SAndre Schwarz 1294c609719bSwdenk CONFIG_EEPRO100 1295c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 129611ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1297c609719bSwdenk write routine for first time initialisation. 1298c609719bSwdenk 1299c609719bSwdenk CONFIG_TULIP 1300c609719bSwdenk Support for Digital 2114x chips. 1301c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1302c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1303c609719bSwdenk 1304c609719bSwdenk CONFIG_NATSEMI 1305c609719bSwdenk Support for National dp83815 chips. 1306c609719bSwdenk 1307c609719bSwdenk CONFIG_NS8382X 1308c609719bSwdenk Support for National dp8382[01] gigabit chips. 1309c609719bSwdenk 131045219c46Swdenk- NETWORK Support (other): 131145219c46Swdenk 1312c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1313c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1314c041e9d2SJens Scharsig 1315c041e9d2SJens Scharsig CONFIG_RMII 1316c041e9d2SJens Scharsig Define this to use reduced MII inteface 1317c041e9d2SJens Scharsig 1318c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1319c041e9d2SJens Scharsig If this defined, the driver is quiet. 1320c041e9d2SJens Scharsig The driver doen't show link status messages. 1321c041e9d2SJens Scharsig 1322efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1323efdd7319SRob Herring Support for the Calxeda XGMAC device 1324efdd7319SRob Herring 13253bb46d23SAshok CONFIG_LAN91C96 132645219c46Swdenk Support for SMSC's LAN91C96 chips. 132745219c46Swdenk 132845219c46Swdenk CONFIG_LAN91C96_BASE 132945219c46Swdenk Define this to hold the physical address 133045219c46Swdenk of the LAN91C96's I/O space 133145219c46Swdenk 133245219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 133345219c46Swdenk Define this to enable 32 bit addressing 133445219c46Swdenk 13353bb46d23SAshok CONFIG_SMC91111 1336f39748aeSwdenk Support for SMSC's LAN91C111 chip 1337f39748aeSwdenk 1338f39748aeSwdenk CONFIG_SMC91111_BASE 1339f39748aeSwdenk Define this to hold the physical address 1340f39748aeSwdenk of the device (I/O space) 1341f39748aeSwdenk 1342f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1343f39748aeSwdenk Define this if data bus is 32 bits 1344f39748aeSwdenk 1345f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1346f39748aeSwdenk Define this to use i/o functions instead of macros 1347f39748aeSwdenk (some hardware wont work with macros) 1348f39748aeSwdenk 1349dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1350dc02badaSHeiko Schocher Support for davinci emac 1351dc02badaSHeiko Schocher 1352dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1353dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1354dc02badaSHeiko Schocher 1355b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1356b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1357b3dbf4a5SMacpaul Lin 1358b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1359b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1360b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1361b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1362b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1363b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1364b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1365b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1366b3dbf4a5SMacpaul Lin 1367c2fff331SMike Rapoport CONFIG_SMC911X 1368557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1369557b377dSJens Gehrlein 1370c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1371557b377dSJens Gehrlein Define this to hold the physical address 1372557b377dSJens Gehrlein of the device (I/O space) 1373557b377dSJens Gehrlein 1374c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1375557b377dSJens Gehrlein Define this if data bus is 32 bits 1376557b377dSJens Gehrlein 1377c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1378557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1379557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1380c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1381557b377dSJens Gehrlein 13823d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13833d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13843d0075faSYoshihiro Shimoda 13853d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13863d0075faSYoshihiro Shimoda Define the number of ports to be used 13873d0075faSYoshihiro Shimoda 13883d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13893d0075faSYoshihiro Shimoda Define the ETH PHY's address 13903d0075faSYoshihiro Shimoda 139168260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 139268260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 139368260aabSYoshihiro Shimoda 1394b2f97cf2SHeiko Schocher- PWM Support: 1395b2f97cf2SHeiko Schocher CONFIG_PWM_IMX 1396b2f97cf2SHeiko Schocher Support for PWM modul on the imx6. 1397b2f97cf2SHeiko Schocher 13985e124724SVadim Bendebury- TPM Support: 139990899cc0SChe-liang Chiou CONFIG_TPM 140090899cc0SChe-liang Chiou Support TPM devices. 140190899cc0SChe-liang Chiou 14021b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 14031b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 14041b393db5STom Wai-Hong Tam per system is supported at this time. 14051b393db5STom Wai-Hong Tam 14061b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 14071b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 14081b393db5STom Wai-Hong Tam 14091b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 14101b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 14111b393db5STom Wai-Hong Tam 14121b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 14131b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 14141b393db5STom Wai-Hong Tam 1415c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1416c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1417c01939c7SDirk Eibach 141890899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 14195e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 14205e124724SVadim Bendebury per system is supported at this time. 14215e124724SVadim Bendebury 14225e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 14235e124724SVadim Bendebury Base address where the generic TPM device is mapped 14245e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 14255e124724SVadim Bendebury 0xfed40000. 14265e124724SVadim Bendebury 1427be6c1529SReinhard Pfau CONFIG_CMD_TPM 1428be6c1529SReinhard Pfau Add tpm monitor functions. 1429be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1430be6c1529SReinhard Pfau provides monitor access to authorized functions. 1431be6c1529SReinhard Pfau 1432be6c1529SReinhard Pfau CONFIG_TPM 1433be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1434be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1435be6c1529SReinhard Pfau Requires support for a TPM device. 1436be6c1529SReinhard Pfau 1437be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1438be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1439be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1440be6c1529SReinhard Pfau 1441c609719bSwdenk- USB Support: 1442c609719bSwdenk At the moment only the UHCI host controller is 14434d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1444c609719bSwdenk CONFIG_USB_UHCI to enable it. 1445c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 144630d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1447c609719bSwdenk storage devices. 1448c609719bSwdenk Note: 1449c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1450c609719bSwdenk (TEAC FD-05PUB). 14514d13cbadSwdenk MPC5200 USB requires additional defines: 14524d13cbadSwdenk CONFIG_USB_CLOCK 14534d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1454307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1455307ecb6dSEric Millbrandt for USB on PSC3 14564d13cbadSwdenk CONFIG_USB_CONFIG 14574d13cbadSwdenk for differential drivers: 0x00001000 14584d13cbadSwdenk for single ended drivers: 0x00005000 1459307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1460307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1462fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1463fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14644d13cbadSwdenk 14659ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14669ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14679ab4ce22SSimon Glass 14686e9e0626SOleksandr Tymoshenko CONFIG_USB_DWC2_REG_ADDR the physical CPU address of the DWC2 14696e9e0626SOleksandr Tymoshenko HW module registers. 14706e9e0626SOleksandr Tymoshenko 147116c8d5e7SWolfgang Denk- USB Device: 147216c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 147316c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 147416c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 147511ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 147616c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 147716c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 147816c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 147916c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 148016c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 148116c8d5e7SWolfgang Denk a Linux host by 148216c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 148316c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 148416c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 148516c8d5e7SWolfgang Denk might be defined in YourBoardName.h 148616c8d5e7SWolfgang Denk 148716c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 148816c8d5e7SWolfgang Denk Define this to build a UDC device 148916c8d5e7SWolfgang Denk 149016c8d5e7SWolfgang Denk CONFIG_USB_TTY 149116c8d5e7SWolfgang Denk Define this to have a tty type of device available to 149216c8d5e7SWolfgang Denk talk to the UDC device 149316c8d5e7SWolfgang Denk 1494f9da0f89SVipin KUMAR CONFIG_USBD_HS 1495f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1496f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1497f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1498f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1499f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1500f9da0f89SVipin KUMAR speed. 1501f9da0f89SVipin KUMAR 15026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 150316c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 150416c8d5e7SWolfgang Denk be set to usbtty. 150516c8d5e7SWolfgang Denk 150616c8d5e7SWolfgang Denk mpc8xx: 15076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 150816c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 15096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 151016c8d5e7SWolfgang Denk 15116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 151216c8d5e7SWolfgang Denk Derive USB clock from brgclk 15136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 151416c8d5e7SWolfgang Denk 151516c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 151616c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 151716c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 151816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 151916c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 152016c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 152116c8d5e7SWolfgang Denk 152216c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 152316c8d5e7SWolfgang Denk Define this string as the name of your company for 152416c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 152516c8d5e7SWolfgang Denk 152616c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 152716c8d5e7SWolfgang Denk Define this string as the name of your product 152816c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 152916c8d5e7SWolfgang Denk 153016c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 153116c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 153216c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 153316c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 153416c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 153516c8d5e7SWolfgang Denk 153616c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 153716c8d5e7SWolfgang Denk Define this as the unique Product ID 153816c8d5e7SWolfgang Denk for your device 153916c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1540c609719bSwdenk 1541d70a560fSIgor Grinberg- ULPI Layer Support: 1542d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1543d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1544d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1545d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1546d70a560fSIgor Grinberg viewport is supported. 1547d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1548d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 15496d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 15506d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 15516d365ea0SLucas Stach the appropriate value in Hz. 1552c609719bSwdenk 1553c609719bSwdenk- MMC Support: 1554c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1555c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1556c609719bSwdenk accessed from the boot prompt by mapping the device 1557c609719bSwdenk to physical memory similar to flash. Command line is 1558602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1559602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1560c609719bSwdenk 1561afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1562afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1563afb35666SYoshihiro Shimoda 1564afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1565afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1566afb35666SYoshihiro Shimoda 1567afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1568afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1569afb35666SYoshihiro Shimoda 15701fd93c6eSPierre Aubert CONFIG_GENERIC_MMC 15711fd93c6eSPierre Aubert Enable the generic MMC driver 15721fd93c6eSPierre Aubert 15731fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_BOOT 15741fd93c6eSPierre Aubert Enable some additional features of the eMMC boot partitions. 15751fd93c6eSPierre Aubert 15761fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_RPMB 15771fd93c6eSPierre Aubert Enable the commands for reading, writing and programming the 15781fd93c6eSPierre Aubert key for the Replay Protection Memory Block partition in eMMC. 15791fd93c6eSPierre Aubert 1580b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1581b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1582b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1583b3ba6e94STom Rini 1584b3ba6e94STom Rini CONFIG_CMD_DFU 1585b3ba6e94STom Rini This enables the command "dfu" which is used to have 1586b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1587b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1588b3ba6e94STom Rini set and define the alt settings to expose to the host. 1589b3ba6e94STom Rini 1590b3ba6e94STom Rini CONFIG_DFU_MMC 1591b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1592b3ba6e94STom Rini 1593c6631764SPantelis Antoniou CONFIG_DFU_NAND 1594c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1595c6631764SPantelis Antoniou 1596a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1597a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1598a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1599a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1600a9479f04SAfzal Mohammed one that would help mostly the developer. 1601a9479f04SAfzal Mohammed 1602e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1603e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1604e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1605e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1606e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1607e7e75c70SHeiko Schocher 1608ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1609ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1610ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1611ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1612ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1613ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1614ea2453d5SPantelis Antoniou 1615001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1616001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1617001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1618001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1619001a8319SHeiko Schocher 1620001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1621001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1622001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1623001a8319SHeiko Schocher sending again an USB request to the device. 1624001a8319SHeiko Schocher 16253aab70afSSebastian Siewior- USB Device Android Fastboot support: 16263aab70afSSebastian Siewior CONFIG_CMD_FASTBOOT 16273aab70afSSebastian Siewior This enables the command "fastboot" which enables the Android 16283aab70afSSebastian Siewior fastboot mode for the platform's USB device. Fastboot is a USB 16293aab70afSSebastian Siewior protocol for downloading images, flashing and device control 16303aab70afSSebastian Siewior used on Android devices. 16313aab70afSSebastian Siewior See doc/README.android-fastboot for more information. 16323aab70afSSebastian Siewior 16333aab70afSSebastian Siewior CONFIG_ANDROID_BOOT_IMAGE 16343aab70afSSebastian Siewior This enables support for booting images which use the Android 16353aab70afSSebastian Siewior image format header. 16363aab70afSSebastian Siewior 16373aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_ADDR 16383aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16393aab70afSSebastian Siewior downloads. Define this to the starting RAM address to use for 16403aab70afSSebastian Siewior downloaded images. 16413aab70afSSebastian Siewior 16423aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_SIZE 16433aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16443aab70afSSebastian Siewior downloads. This buffer should be as large as possible for a 16453aab70afSSebastian Siewior platform. Define this to the size available RAM for fastboot. 16463aab70afSSebastian Siewior 1647d1b5ed07SSteve Rae CONFIG_FASTBOOT_FLASH 1648d1b5ed07SSteve Rae The fastboot protocol includes a "flash" command for writing 1649d1b5ed07SSteve Rae the downloaded image to a non-volatile storage device. Define 1650d1b5ed07SSteve Rae this to enable the "fastboot flash" command. 1651d1b5ed07SSteve Rae 1652d1b5ed07SSteve Rae CONFIG_FASTBOOT_FLASH_MMC_DEV 1653d1b5ed07SSteve Rae The fastboot "flash" command requires additional information 1654d1b5ed07SSteve Rae regarding the non-volatile storage device. Define this to 1655d1b5ed07SSteve Rae the eMMC device that fastboot should use to store the image. 1656d1b5ed07SSteve Rae 16576705d81eSwdenk- Journaling Flash filesystem support: 16586705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 16596705d81eSwdenk CONFIG_JFFS2_NAND_DEV 16606705d81eSwdenk Define these for a default partition on a NAND device 16616705d81eSwdenk 16626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 16636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 16646705d81eSwdenk Define these for a default partition on a NOR device 16656705d81eSwdenk 16666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 16676705d81eSwdenk Define this to create an own partition. You have to provide a 16686705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 16696705d81eSwdenk 16706705d81eSwdenk If you define only one JFFS2 partition you may also want to 16716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 16726705d81eSwdenk to disable the command chpart. This is the default when you 16736705d81eSwdenk have not defined a custom partition 16746705d81eSwdenk 1675c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1676c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1677656f4c65SDonggeun Kim 1678656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1679656f4c65SDonggeun Kim file in FAT formatted partition. 1680656f4c65SDonggeun Kim 1681656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1682656f4c65SDonggeun Kim user to write files to FAT. 1683c30a15e5SDonggeun Kim 168484cd9327SGabe BlackCBFS (Coreboot Filesystem) support 168584cd9327SGabe Black CONFIG_CMD_CBFS 168684cd9327SGabe Black 168784cd9327SGabe Black Define this to enable support for reading from a Coreboot 168884cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 168984cd9327SGabe Black and cbfsload. 169084cd9327SGabe Black 16914f0d1a2aSSiva Durga Prasad Paladugu- FAT(File Allocation Table) filesystem cluster size: 16924f0d1a2aSSiva Durga Prasad Paladugu CONFIG_FS_FAT_MAX_CLUSTSIZE 16934f0d1a2aSSiva Durga Prasad Paladugu 16944f0d1a2aSSiva Durga Prasad Paladugu Define the max cluster size for fat operations else 16954f0d1a2aSSiva Durga Prasad Paladugu a default value of 65536 will be defined. 16964f0d1a2aSSiva Durga Prasad Paladugu 1697c609719bSwdenk- Keyboard Support: 1698c609719bSwdenk CONFIG_ISA_KEYBOARD 1699c609719bSwdenk 1700c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1701c609719bSwdenk support 1702c609719bSwdenk 1703c609719bSwdenk CONFIG_I8042_KBD 1704c609719bSwdenk Standard PC keyboard driver with US (is default) and 1705c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1706c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1707c609719bSwdenk for cfb_console. Supports cursor blinking. 1708c609719bSwdenk 1709713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1710713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1711713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1712713cb680SHung-ying Tyan which provides key scans on request. 1713713cb680SHung-ying Tyan 1714c609719bSwdenk- Video support: 1715c609719bSwdenk CONFIG_VIDEO 1716c609719bSwdenk 1717c609719bSwdenk Define this to enable video support (for output to 1718c609719bSwdenk video). 1719c609719bSwdenk 1720c609719bSwdenk CONFIG_VIDEO_CT69000 1721c609719bSwdenk 1722c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1723c609719bSwdenk 1724c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1725eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1726eeb1b77bSwdenk video output is selected via environment 'videoout' 1727eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1728eeb1b77bSwdenk assumed. 1729c609719bSwdenk 1730eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 173111ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1732eeb1b77bSwdenk are possible: 1733eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1734eeb1b77bSwdenk Following standard modes are supported (* is default): 1735eeb1b77bSwdenk 1736eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1737eeb1b77bSwdenk -------------+--------------------------------------------- 1738eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1739eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1740eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1741eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1742eeb1b77bSwdenk -------------+--------------------------------------------- 1743c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1744c609719bSwdenk 1745eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 17467817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1747eeb1b77bSwdenk 1748eeb1b77bSwdenk 1749a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1750a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1751a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1752a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1753a6c7ad2fSwdenk 17547d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 17557d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 17567d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 17577d3053fbSTimur Tabi support, and should also define these other macros: 17587d3053fbSTimur Tabi 17597d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 17607d3053fbSTimur Tabi CONFIG_VIDEO 17617d3053fbSTimur Tabi CONFIG_CMD_BMP 17627d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 17637d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 17647d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 17657d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 17667d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 17677d3053fbSTimur Tabi 1768ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1769ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1770ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1771ba8e76bdSTimur Tabi description of this variable. 17727d3053fbSTimur Tabi 1773058d59b0SSimon Glass CONFIG_VIDEO_VGA 1774058d59b0SSimon Glass 1775058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1776058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1777058d59b0SSimon Glass driver. 1778058d59b0SSimon Glass 1779058d59b0SSimon Glass 1780682011ffSwdenk- Keyboard Support: 1781682011ffSwdenk CONFIG_KEYBOARD 1782682011ffSwdenk 1783682011ffSwdenk Define this to enable a custom keyboard support. 1784682011ffSwdenk This simply calls drv_keyboard_init() which must be 1785682011ffSwdenk defined in your board-specific files. 1786682011ffSwdenk The only board using this so far is RBC823. 1787a6c7ad2fSwdenk 1788c609719bSwdenk- LCD Support: CONFIG_LCD 1789c609719bSwdenk 1790c609719bSwdenk Define this to enable LCD support (for output to LCD 1791c609719bSwdenk display); also select one of the supported displays 1792c609719bSwdenk by defining one of these: 1793c609719bSwdenk 179439cf4804SStelian Pop CONFIG_ATMEL_LCD: 179539cf4804SStelian Pop 179639cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 179739cf4804SStelian Pop 1798fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1799c609719bSwdenk 1800fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1801c609719bSwdenk 1802fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1803c609719bSwdenk 1804fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1805fd3103bbSwdenk Active, color, single scan. 1806fd3103bbSwdenk 1807fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1808fd3103bbSwdenk 1809fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1810c609719bSwdenk Active, color, single scan. 1811c609719bSwdenk 1812c609719bSwdenk CONFIG_SHARP_16x9 1813c609719bSwdenk 1814c609719bSwdenk Sharp 320x240. Active, color, single scan. 1815c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1816c609719bSwdenk 1817c609719bSwdenk CONFIG_SHARP_LQ64D341 1818c609719bSwdenk 1819c609719bSwdenk Sharp LQ64D341 display, 640x480. 1820c609719bSwdenk Active, color, single scan. 1821c609719bSwdenk 1822c609719bSwdenk CONFIG_HLD1045 1823c609719bSwdenk 1824c609719bSwdenk HLD1045 display, 640x480. 1825c609719bSwdenk Active, color, single scan. 1826c609719bSwdenk 1827c609719bSwdenk CONFIG_OPTREX_BW 1828c609719bSwdenk 1829c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1830c609719bSwdenk or 1831c609719bSwdenk Hitachi LMG6912RPFC-00T 1832c609719bSwdenk or 1833c609719bSwdenk Hitachi SP14Q002 1834c609719bSwdenk 1835c609719bSwdenk 320x240. Black & white. 1836c609719bSwdenk 1837c609719bSwdenk Normally display is black on white background; define 18386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1839c609719bSwdenk 1840676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1841676d319eSSimon Glass 1842676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1843676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1844676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1845676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1846676d319eSSimon Glass a per-section basis. 1847676d319eSSimon Glass 18480d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 18490d89efefSSimon Glass 18500d89efefSSimon Glass When the console need to be scrolled, this is the number of 18510d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 18520d89efefSSimon Glass the console jump but can help speed up operation when scrolling 18530d89efefSSimon Glass is slow. 1854676d319eSSimon Glass 185545d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 185645d7f525STom Wai-Hong Tam 185745d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 185845d7f525STom Wai-Hong Tam 1859735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1860735987c5STom Wai-Hong Tam 1861735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1862735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1863735987c5STom Wai-Hong Tam 18647152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1865d791b1dcSwdenk 1866d791b1dcSwdenk If this option is set, the environment is checked for 1867d791b1dcSwdenk a variable "splashimage". If found, the usual display 1868d791b1dcSwdenk of logo, copyright and system information on the LCD 1869e94d2cd9Swdenk is suppressed and the BMP image at the address 1870d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1871d791b1dcSwdenk console is redirected to the "nulldev", too. This 1872d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1873d791b1dcSwdenk loaded very quickly after power-on. 1874d791b1dcSwdenk 1875c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1876c0880485SNikita Kiryanov 1877c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1878c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 18791551df35STom Rini (see README.displaying-bmps). 1880c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1881c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1882c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1883c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1884c0880485SNikita Kiryanov there is no need to set this option. 1885c0880485SNikita Kiryanov 18861ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 18871ca298ceSMatthias Weisser 18881ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 18891ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 18901ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 18911ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 18921ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 18931ca298ceSMatthias Weisser specify 'm' for centering the image. 18941ca298ceSMatthias Weisser 18951ca298ceSMatthias Weisser Example: 18961ca298ceSMatthias Weisser setenv splashpos m,m 18971ca298ceSMatthias Weisser => image at center of screen 18981ca298ceSMatthias Weisser 18991ca298ceSMatthias Weisser setenv splashpos 30,20 19001ca298ceSMatthias Weisser => image at x = 30 and y = 20 19011ca298ceSMatthias Weisser 19021ca298ceSMatthias Weisser setenv splashpos -10,m 19031ca298ceSMatthias Weisser => vertically centered image 19041ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 19051ca298ceSMatthias Weisser 190698f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 190798f4a3dfSStefan Roese 190898f4a3dfSStefan Roese If this option is set, additionally to standard BMP 190998f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 191098f4a3dfSStefan Roese splashscreen support or the bmp command. 191198f4a3dfSStefan Roese 1912d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1913d5011762SAnatolij Gustschin 1914d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1915d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1916d5011762SAnatolij Gustschin bmp command. 1917d5011762SAnatolij Gustschin 1918f2b96dfbSLei Wen- Do compresssing for memory range: 1919f2b96dfbSLei Wen CONFIG_CMD_ZIP 1920f2b96dfbSLei Wen 1921f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1922f2b96dfbSLei Wen to compress the specified memory at its best effort. 1923f2b96dfbSLei Wen 1924c29fdfc1Swdenk- Compression support: 19258ef70478SKees Cook CONFIG_GZIP 19268ef70478SKees Cook 19278ef70478SKees Cook Enabled by default to support gzip compressed images. 19288ef70478SKees Cook 1929c29fdfc1Swdenk CONFIG_BZIP2 1930c29fdfc1Swdenk 1931c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1932c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1933c29fdfc1Swdenk compressed images are supported. 1934c29fdfc1Swdenk 1935c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 19366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1937c29fdfc1Swdenk be at least 4MB. 1938d791b1dcSwdenk 1939fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1940fc9c1727SLuigi 'Comio' Mantellini 1941fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1942fc9c1727SLuigi 'Comio' Mantellini images is included. 1943fc9c1727SLuigi 'Comio' Mantellini 1944fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1945fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1946fc9c1727SLuigi 'Comio' Mantellini formula: 1947fc9c1727SLuigi 'Comio' Mantellini 1948fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1949fc9c1727SLuigi 'Comio' Mantellini 1950fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1951fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1952fc9c1727SLuigi 'Comio' Mantellini 1953fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1954fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1955fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1956fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1957fc9c1727SLuigi 'Comio' Mantellini 1958fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1959fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 19606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1961fc9c1727SLuigi 'Comio' Mantellini 19628ef70478SKees Cook CONFIG_LZO 19638ef70478SKees Cook 19648ef70478SKees Cook If this option is set, support for LZO compressed images 19658ef70478SKees Cook is included. 19668ef70478SKees Cook 196717ea1177Swdenk- MII/PHY support: 196817ea1177Swdenk CONFIG_PHY_ADDR 196917ea1177Swdenk 197017ea1177Swdenk The address of PHY on MII bus. 197117ea1177Swdenk 197217ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 197317ea1177Swdenk 197417ea1177Swdenk The clock frequency of the MII bus 197517ea1177Swdenk 197617ea1177Swdenk CONFIG_PHY_GIGE 197717ea1177Swdenk 197817ea1177Swdenk If this option is set, support for speed/duplex 197911ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 198017ea1177Swdenk 198117ea1177Swdenk CONFIG_PHY_RESET_DELAY 198217ea1177Swdenk 198317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 198417ea1177Swdenk reset before any MII register access is possible. 198517ea1177Swdenk For such PHY, set this option to the usec delay 198617ea1177Swdenk required. (minimum 300usec for LXT971A) 198717ea1177Swdenk 198817ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 198917ea1177Swdenk 199017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 199117ea1177Swdenk command issued before MII status register can be read 199217ea1177Swdenk 1993c609719bSwdenk- Ethernet address: 1994c609719bSwdenk CONFIG_ETHADDR 1995c68a05feSrichardretanubun CONFIG_ETH1ADDR 1996c609719bSwdenk CONFIG_ETH2ADDR 1997c609719bSwdenk CONFIG_ETH3ADDR 1998c68a05feSrichardretanubun CONFIG_ETH4ADDR 1999c68a05feSrichardretanubun CONFIG_ETH5ADDR 2000c609719bSwdenk 200111ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 200211ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 2003c609719bSwdenk is not determined automatically. 2004c609719bSwdenk 2005c609719bSwdenk- IP address: 2006c609719bSwdenk CONFIG_IPADDR 2007c609719bSwdenk 2008c609719bSwdenk Define a default value for the IP address to use for 200911ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 2010c609719bSwdenk determined through e.g. bootp. 20111ebcd654SWolfgang Denk (Environment variable "ipaddr") 2012c609719bSwdenk 2013c609719bSwdenk- Server IP address: 2014c609719bSwdenk CONFIG_SERVERIP 2015c609719bSwdenk 2016c609719bSwdenk Defines a default value for the IP address of a TFTP 2017c609719bSwdenk server to contact when using the "tftboot" command. 20181ebcd654SWolfgang Denk (Environment variable "serverip") 2019c609719bSwdenk 202097cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 202197cfe861SRobin Getz 202297cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 202397cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 202497cfe861SRobin Getz 20251ebcd654SWolfgang Denk- Gateway IP address: 20261ebcd654SWolfgang Denk CONFIG_GATEWAYIP 20271ebcd654SWolfgang Denk 20281ebcd654SWolfgang Denk Defines a default value for the IP address of the 20291ebcd654SWolfgang Denk default router where packets to other networks are 20301ebcd654SWolfgang Denk sent to. 20311ebcd654SWolfgang Denk (Environment variable "gatewayip") 20321ebcd654SWolfgang Denk 20331ebcd654SWolfgang Denk- Subnet mask: 20341ebcd654SWolfgang Denk CONFIG_NETMASK 20351ebcd654SWolfgang Denk 20361ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 20371ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 20381ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 20391ebcd654SWolfgang Denk forwarded through a router. 20401ebcd654SWolfgang Denk (Environment variable "netmask") 20411ebcd654SWolfgang Denk 204253a5c424SDavid Updegraff- Multicast TFTP Mode: 204353a5c424SDavid Updegraff CONFIG_MCAST_TFTP 204453a5c424SDavid Updegraff 204553a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 204653a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 204711ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 204853a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 204953a5c424SDavid Updegraff multicast group. 205053a5c424SDavid Updegraff 2051c609719bSwdenk- BOOTP Recovery Mode: 2052c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 2053c609719bSwdenk 2054c609719bSwdenk If you have many targets in a network that try to 2055c609719bSwdenk boot using BOOTP, you may want to avoid that all 2056c609719bSwdenk systems send out BOOTP requests at precisely the same 2057c609719bSwdenk moment (which would happen for instance at recovery 2058c609719bSwdenk from a power failure, when all systems will try to 2059c609719bSwdenk boot, thus flooding the BOOTP server. Defining 2060c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 2061c609719bSwdenk inserted before sending out BOOTP requests. The 20626c33c785SWolfgang Denk following delays are inserted then: 2063c609719bSwdenk 2064c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 2065c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 2066c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 2067c609719bSwdenk 4th and following 2068c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 2069c609719bSwdenk 207092ac8accSThierry Reding CONFIG_BOOTP_ID_CACHE_SIZE 207192ac8accSThierry Reding 207292ac8accSThierry Reding BOOTP packets are uniquely identified using a 32-bit ID. The 207392ac8accSThierry Reding server will copy the ID from client requests to responses and 207492ac8accSThierry Reding U-Boot will use this to determine if it is the destination of 207592ac8accSThierry Reding an incoming response. Some servers will check that addresses 207692ac8accSThierry Reding aren't in use before handing them out (usually using an ARP 207792ac8accSThierry Reding ping) and therefore take up to a few hundred milliseconds to 207892ac8accSThierry Reding respond. Network congestion may also influence the time it 207992ac8accSThierry Reding takes for a response to make it back to the client. If that 208092ac8accSThierry Reding time is too long, U-Boot will retransmit requests. In order 208192ac8accSThierry Reding to allow earlier responses to still be accepted after these 208292ac8accSThierry Reding retransmissions, U-Boot's BOOTP client keeps a small cache of 208392ac8accSThierry Reding IDs. The CONFIG_BOOTP_ID_CACHE_SIZE controls the size of this 208492ac8accSThierry Reding cache. The default is to keep IDs for up to four outstanding 208592ac8accSThierry Reding requests. Increasing this will allow U-Boot to accept offers 208692ac8accSThierry Reding from a BOOTP client in networks with unusually high latency. 208792ac8accSThierry Reding 2088fe389a82Sstroese- DHCP Advanced Options: 20891fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 20901fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 2091fe389a82Sstroese 20921fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 20931fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 20941fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 20951fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 20961fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 20971fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 20981fe80d79SJon Loeliger CONFIG_BOOTP_DNS 20991fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 21001fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 21011fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 21021fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 21031fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 21042c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 2105fe389a82Sstroese 21065d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 21075d110f0aSWilson Callan environment variable, not the BOOTP server. 2108fe389a82Sstroese 21092c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 21102c00e099SJoe Hershberger after the configured retry count, the call will fail 21112c00e099SJoe Hershberger instead of starting over. This can be used to fail over 21122c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 21132c00e099SJoe Hershberger is not available. 21142c00e099SJoe Hershberger 2115fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 2116fe389a82Sstroese serverip from a DHCP server, it is possible that more 2117fe389a82Sstroese than one DNS serverip is offered to the client. 2118fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2119fe389a82Sstroese serverip will be stored in the additional environment 2120fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2121fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 21221fe80d79SJon Loeliger is defined. 2123fe389a82Sstroese 2124fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2125fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2126fe389a82Sstroese need the hostname of the DHCP requester. 21275d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 21281fe80d79SJon Loeliger of the "hostname" environment variable is passed as 21291fe80d79SJon Loeliger option 12 to the DHCP server. 2130fe389a82Sstroese 2131d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2132d9a2f416SAras Vaichas 2133d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2134d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2135d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2136d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2137d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2138d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2139d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2140d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2141d9a2f416SAras Vaichas that one of the retries will be successful but note that 2142d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2143d9a2f416SAras Vaichas this delay. 2144d9a2f416SAras Vaichas 2145d22c338eSJoe Hershberger - Link-local IP address negotiation: 2146d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2147d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2148d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2149d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2150d22c338eSJoe Hershberger 2151d22c338eSJoe Hershberger See doc/README.link-local for more information. 2152d22c338eSJoe Hershberger 2153a3d991bdSwdenk - CDP Options: 2154a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2155a3d991bdSwdenk 2156a3d991bdSwdenk The device id used in CDP trigger frames. 2157a3d991bdSwdenk 2158a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2159a3d991bdSwdenk 2160a3d991bdSwdenk A two character string which is prefixed to the MAC address 2161a3d991bdSwdenk of the device. 2162a3d991bdSwdenk 2163a3d991bdSwdenk CONFIG_CDP_PORT_ID 2164a3d991bdSwdenk 2165a3d991bdSwdenk A printf format string which contains the ascii name of 2166a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 216711ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2168a3d991bdSwdenk 2169a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2170a3d991bdSwdenk 2171a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2172a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2173a3d991bdSwdenk 2174a3d991bdSwdenk CONFIG_CDP_VERSION 2175a3d991bdSwdenk 2176a3d991bdSwdenk An ascii string containing the version of the software. 2177a3d991bdSwdenk 2178a3d991bdSwdenk CONFIG_CDP_PLATFORM 2179a3d991bdSwdenk 2180a3d991bdSwdenk An ascii string containing the name of the platform. 2181a3d991bdSwdenk 2182a3d991bdSwdenk CONFIG_CDP_TRIGGER 2183a3d991bdSwdenk 2184a3d991bdSwdenk A 32bit integer sent on the trigger. 2185a3d991bdSwdenk 2186a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2187a3d991bdSwdenk 2188a3d991bdSwdenk A 16bit integer containing the power consumption of the 2189a3d991bdSwdenk device in .1 of milliwatts. 2190a3d991bdSwdenk 2191a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2192a3d991bdSwdenk 2193a3d991bdSwdenk A byte containing the id of the VLAN. 2194a3d991bdSwdenk 2195c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2196c609719bSwdenk 2197c609719bSwdenk Several configurations allow to display the current 2198c609719bSwdenk status using a LED. For instance, the LED will blink 2199c609719bSwdenk fast while running U-Boot code, stop blinking as 2200c609719bSwdenk soon as a reply to a BOOTP request was received, and 2201c609719bSwdenk start blinking slow once the Linux kernel is running 2202c609719bSwdenk (supported by a status LED driver in the Linux 2203c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2204c609719bSwdenk feature in U-Boot. 2205c609719bSwdenk 22061df7bbbaSIgor Grinberg Additional options: 22071df7bbbaSIgor Grinberg 22081df7bbbaSIgor Grinberg CONFIG_GPIO_LED 22091df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 22101df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 22111df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 22121df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 22131df7bbbaSIgor Grinberg 22149dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 22159dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 22169dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 22179dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 22189dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 22199dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 22209dfdcdfeSIgor Grinberg 2221c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2222c609719bSwdenk 2223c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2224c609719bSwdenk on those systems that support this (optional) 2225c609719bSwdenk feature, like the TQM8xxL modules. 2226c609719bSwdenk 22273f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2228c609719bSwdenk 22293f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 22303f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 22313f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 22323f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 22333f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 22343f4978c7SHeiko Schocher interface. 22353f4978c7SHeiko Schocher 22363f4978c7SHeiko Schocher ported i2c driver to the new framework: 2237ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2238ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2239ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2240ea818dbbSHeiko Schocher for defining speed and slave address 2241ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2242ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2243ea818dbbSHeiko Schocher for defining speed and slave address 2244ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2245ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2246ea818dbbSHeiko Schocher for defining speed and slave address 2247ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2248ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2249ea818dbbSHeiko Schocher for defining speed and slave address 22503f4978c7SHeiko Schocher 225100f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 225200f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 225300f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 225400f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 225500f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 225600f792e0SHeiko Schocher bus. 225700f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 225800f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 225900f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 226000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 226100f792e0SHeiko Schocher second bus. 226200f792e0SHeiko Schocher 22631f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 22641f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 22651f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 22661f2ba722SSimon Glass 100000 and the slave addr 0! 22671f2ba722SSimon Glass 2268880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2269880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2270880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2271880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2272880540deSDirk Eibach 2273fac96408Strem - drivers/i2c/i2c_mxc.c 2274fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2275fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2276fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2277fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2278fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2279fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2280fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2281fac96408Strem If thoses defines are not set, default value is 100000 2282fac96408Strem for speed, and 0 for slave. 2283fac96408Strem 22841086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 22851086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 22861086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 22871086bfa9SNobuhiro Iwamatsu 22881086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 22891086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 22901086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 22911086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 22921086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 22931086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 22941086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 22951086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 22961086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 22971086bfa9SNobuhiro Iwamatsu 22982035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 22992035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 23002035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 23012035d77dSNobuhiro Iwamatsu 23022035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 23032035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 23042035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 23052035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 23062035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 23072035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 23082035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 23092035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 23102035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 23112035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 23122035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 23132035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 23142035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 23152035d77dSNobuhiro Iwamatsu 23166789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 23176789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 23186789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 23196789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 23206789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 23216789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 23226789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 23236789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 23246789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 23256789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 23266789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 23276789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 23286789e84eSHeiko Schocher 23290bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 23300bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 23310bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 23320bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 23330bdffe71SHeiko Schocher 2334e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2335e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2336e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2337e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2338e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2339e717fc6dSNaveen Krishna Ch 2340b46226bdSDirk Eibach - drivers/i2c/ihs_i2c.c 2341b46226bdSDirk Eibach - activate this driver with CONFIG_SYS_I2C_IHS 2342b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0 2343b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0 2344b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0 2345b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1 2346b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1 2347b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1 2348b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2 2349b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2 2350b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2 2351b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3 2352b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3 2353b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3 2354b46226bdSDirk Eibach 23553f4978c7SHeiko Schocher additional defines: 23563f4978c7SHeiko Schocher 23573f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 23583f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 23593f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 23603f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 23613f4978c7SHeiko Schocher omit this define. 23623f4978c7SHeiko Schocher 23633f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 23643f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 23653f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 23663f4978c7SHeiko Schocher omit this define. 23673f4978c7SHeiko Schocher 23683f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 23693f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 23703f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 23713f4978c7SHeiko Schocher define. 23723f4978c7SHeiko Schocher 23733f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 23743f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 23753f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 23763f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 23773f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 23783f4978c7SHeiko Schocher 23793f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 23803f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 23813f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 23823f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 23833f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 23843f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 23853f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 23863f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 23873f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 23883f4978c7SHeiko Schocher } 23893f4978c7SHeiko Schocher 23903f4978c7SHeiko Schocher which defines 23913f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2392ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2393ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2394ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2395ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2396ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 23973f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2398ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2399ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 24003f4978c7SHeiko Schocher 24013f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 24023f4978c7SHeiko Schocher 2403ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 24043f4978c7SHeiko Schocher 24053f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 24063f4978c7SHeiko Schocher provides the following compelling advantages: 24073f4978c7SHeiko Schocher 24083f4978c7SHeiko Schocher - more than one i2c adapter is usable 24093f4978c7SHeiko Schocher - approved multibus support 24103f4978c7SHeiko Schocher - better i2c mux support 24113f4978c7SHeiko Schocher 24123f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 24133f4978c7SHeiko Schocher 2414ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2415ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2416ea818dbbSHeiko Schocher for the selected CPU. 2417c609719bSwdenk 2418b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2419602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2420b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2421b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2422c609719bSwdenk command line interface. 2423c609719bSwdenk 2424bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2425c609719bSwdenk 2426b37c7e5eSwdenk There are several other quantities that must also be 2427ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2428c609719bSwdenk 24296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2430b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 24316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 243211ccc33fSMarcel Ziswiler the CPU's i2c node address). 2433c609719bSwdenk 24348d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2435a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 24368d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 24378d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 24388d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2439b37c7e5eSwdenk 24405da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 24415da71efaSEric Millbrandt 24425da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 24435da71efaSEric Millbrandt chips might think that the current transfer is still 24445da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 24455da71efaSEric Millbrandt commands until the slave device responds. 24465da71efaSEric Millbrandt 2447b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2448b37c7e5eSwdenk 2449ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2450b37c7e5eSwdenk then the following macros need to be defined (examples are 2451b37c7e5eSwdenk from include/configs/lwmon.h): 2452c609719bSwdenk 2453c609719bSwdenk I2C_INIT 2454c609719bSwdenk 2455b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2456c609719bSwdenk controller or configure ports. 2457c609719bSwdenk 2458b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2459b37c7e5eSwdenk 2460c609719bSwdenk I2C_PORT 2461c609719bSwdenk 2462c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2463c609719bSwdenk assumes both bits are on the same port). Valid values 2464c609719bSwdenk are 0..3 for ports A..D. 2465c609719bSwdenk 2466c609719bSwdenk I2C_ACTIVE 2467c609719bSwdenk 2468c609719bSwdenk The code necessary to make the I2C data line active 2469c609719bSwdenk (driven). If the data line is open collector, this 2470c609719bSwdenk define can be null. 2471c609719bSwdenk 2472b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2473b37c7e5eSwdenk 2474c609719bSwdenk I2C_TRISTATE 2475c609719bSwdenk 2476c609719bSwdenk The code necessary to make the I2C data line tri-stated 2477c609719bSwdenk (inactive). If the data line is open collector, this 2478c609719bSwdenk define can be null. 2479c609719bSwdenk 2480b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2481b37c7e5eSwdenk 2482c609719bSwdenk I2C_READ 2483c609719bSwdenk 2484472d5460SYork Sun Code that returns true if the I2C data line is high, 2485472d5460SYork Sun false if it is low. 2486c609719bSwdenk 2487b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2488b37c7e5eSwdenk 2489c609719bSwdenk I2C_SDA(bit) 2490c609719bSwdenk 2491472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2492472d5460SYork Sun is false, it clears it (low). 2493c609719bSwdenk 2494b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2495b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2496b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2497b37c7e5eSwdenk 2498c609719bSwdenk I2C_SCL(bit) 2499c609719bSwdenk 2500472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2501472d5460SYork Sun is false, it clears it (low). 2502c609719bSwdenk 2503b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2504b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2505b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2506b37c7e5eSwdenk 2507c609719bSwdenk I2C_DELAY 2508c609719bSwdenk 2509c609719bSwdenk This delay is invoked four times per clock cycle so this 2510c609719bSwdenk controls the rate of data transfer. The data rate thus 2511b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2512b37c7e5eSwdenk like: 2513b37c7e5eSwdenk 2514b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2515c609719bSwdenk 2516793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2517793b5726SMike Frysinger 2518793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2519793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2520793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2521793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2522793b5726SMike Frysinger 2523793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2524793b5726SMike Frysinger the generic GPIO functions. 2525793b5726SMike Frysinger 25266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 252747cd00faSwdenk 252847cd00faSwdenk When a board is reset during an i2c bus transfer 252947cd00faSwdenk chips might think that the current transfer is still 253047cd00faSwdenk in progress. On some boards it is possible to access 253147cd00faSwdenk the i2c SCLK line directly, either by using the 253247cd00faSwdenk processor pin as a GPIO or by having a second pin 253347cd00faSwdenk connected to the bus. If this option is defined a 253447cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 253547cd00faSwdenk is run early in the boot sequence. 253647cd00faSwdenk 253726a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 253826a33504SRichard Retanubun 253926a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 254026a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 254126a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 254226a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 254326a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 254426a33504SRichard Retanubun controller provide such a method. It is called at the end of 254526a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 254626a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 254726a33504SRichard Retanubun 254817ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 254917ea1177Swdenk 255017ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 255117ea1177Swdenk in u-boot bd_info structure based on u-boot environment 255217ea1177Swdenk variable "i2cfast". (see also i2cfast) 255317ea1177Swdenk 2554bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2555bb99ad6dSBen Warren 2556bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2557bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2558bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2559bb99ad6dSBen Warren Note that bus numbering is zero-based. 2560bb99ad6dSBen Warren 25616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2562bb99ad6dSBen Warren 2563bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 25640f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 25650f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 25660f89c54bSPeter Tyser a 1D array of device addresses 2567bb99ad6dSBen Warren 2568bb99ad6dSBen Warren e.g. 2569bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 25706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2571bb99ad6dSBen Warren 2572bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2573bb99ad6dSBen Warren 2574bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 25756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2576bb99ad6dSBen Warren 2577bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2578bb99ad6dSBen Warren 25796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2580be5e6181STimur Tabi 2581be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2582be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2583be5e6181STimur Tabi 25846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 25850dc018ecSStefan Roese 25860dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 25870dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 25880dc018ecSStefan Roese 25896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 25900dc018ecSStefan Roese 25910dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 25920dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 25930dc018ecSStefan Roese 25946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 25959ebbb54fSVictor Gallardo 25969ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 25979ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 25989ebbb54fSVictor Gallardo specified DTT device. 25999ebbb54fSVictor Gallardo 26002ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 26012ac6985aSAndrew Dyer 26022ac6985aSAndrew Dyer defining this will force the i2c_read() function in 26032ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 26042ac6985aSAndrew Dyer between writing the address pointer and reading the 26052ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 26062ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 26072ac6985aSAndrew Dyer devices can use either method, but some require one or 26082ac6985aSAndrew Dyer the other. 2609be5e6181STimur Tabi 2610c609719bSwdenk- SPI Support: CONFIG_SPI 2611c609719bSwdenk 2612c609719bSwdenk Enables SPI driver (so far only tested with 2613c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2614c609719bSwdenk D/As on the SACSng board) 2615c609719bSwdenk 26166639562eSYoshihiro Shimoda CONFIG_SH_SPI 26176639562eSYoshihiro Shimoda 26186639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 26196639562eSYoshihiro Shimoda only SH7757 is supported. 26206639562eSYoshihiro Shimoda 2621c609719bSwdenk CONFIG_SPI_X 2622c609719bSwdenk 2623c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2624c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2625c609719bSwdenk 2626c609719bSwdenk CONFIG_SOFT_SPI 2627c609719bSwdenk 2628c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2629c609719bSwdenk using hardware support. This is a general purpose 2630c609719bSwdenk driver that only requires three general I/O port pins 2631c609719bSwdenk (two outputs, one input) to function. If this is 2632c609719bSwdenk defined, the board configuration must define several 2633c609719bSwdenk SPI configuration items (port pins to use, etc). For 2634c609719bSwdenk an example, see include/configs/sacsng.h. 2635c609719bSwdenk 263604a9e118SBen Warren CONFIG_HARD_SPI 263704a9e118SBen Warren 263804a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 263904a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 264004a9e118SBen Warren must define a list of chip-select function pointers. 264104a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 264204a9e118SBen Warren example, see include/configs/mpc8349emds.h. 264304a9e118SBen Warren 264438254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 264538254f45SGuennadi Liakhovetski 264638254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 26472e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 264838254f45SGuennadi Liakhovetski 2649f659b573SHeiko Schocher CONFIG_SYS_SPI_MXC_WAIT 2650f659b573SHeiko Schocher Timeout for waiting until spi transfer completed. 2651f659b573SHeiko Schocher default: (CONFIG_SYS_HZ/100) /* 10 ms */ 2652f659b573SHeiko Schocher 26530133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 26540133502eSMatthias Fuchs 26550133502eSMatthias Fuchs Enables FPGA subsystem. 26560133502eSMatthias Fuchs 26570133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 26580133502eSMatthias Fuchs 26590133502eSMatthias Fuchs Enables support for specific chip vendors. 26600133502eSMatthias Fuchs (ALTERA, XILINX) 26610133502eSMatthias Fuchs 26620133502eSMatthias Fuchs CONFIG_FPGA_<family> 26630133502eSMatthias Fuchs 26640133502eSMatthias Fuchs Enables support for FPGA family. 26650133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 26660133502eSMatthias Fuchs 26670133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2668c609719bSwdenk 2669c609719bSwdenk Specify the number of FPGA devices to support. 2670c609719bSwdenk 267164e809afSSiva Durga Prasad Paladugu CONFIG_CMD_FPGA_LOADMK 267264e809afSSiva Durga Prasad Paladugu 267364e809afSSiva Durga Prasad Paladugu Enable support for fpga loadmk command 267464e809afSSiva Durga Prasad Paladugu 267567193864SMichal Simek CONFIG_CMD_FPGA_LOADP 267667193864SMichal Simek 267767193864SMichal Simek Enable support for fpga loadp command - load partial bitstream 267867193864SMichal Simek 267967193864SMichal Simek CONFIG_CMD_FPGA_LOADBP 268067193864SMichal Simek 268167193864SMichal Simek Enable support for fpga loadbp command - load partial bitstream 268267193864SMichal Simek (Xilinx only) 268367193864SMichal Simek 26846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2685c609719bSwdenk 2686c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2687c609719bSwdenk 26886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2689c609719bSwdenk 2690c609719bSwdenk Enable checks on FPGA configuration interface busy 2691c609719bSwdenk status by the configuration function. This option 2692c609719bSwdenk will require a board or device specific function to 2693c609719bSwdenk be written. 2694c609719bSwdenk 2695c609719bSwdenk CONFIG_FPGA_DELAY 2696c609719bSwdenk 2697c609719bSwdenk If defined, a function that provides delays in the FPGA 2698c609719bSwdenk configuration driver. 2699c609719bSwdenk 27006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2701c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2702c609719bSwdenk 27036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2704c609719bSwdenk 2705c609719bSwdenk Check for configuration errors during FPGA bitfile 2706c609719bSwdenk loading. For example, abort during Virtex II 2707c609719bSwdenk configuration if the INIT_B line goes low (which 2708c609719bSwdenk indicated a CRC error). 2709c609719bSwdenk 27106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2711c609719bSwdenk 2712c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2713c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2714c609719bSwdenk FPGA configuration sequence. The default time is 500 271511ccc33fSMarcel Ziswiler ms. 2716c609719bSwdenk 27176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2718c609719bSwdenk 2719c609719bSwdenk Maximum time to wait for BUSY to deassert during 272011ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2721c609719bSwdenk 27226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2723c609719bSwdenk 2724c609719bSwdenk Time to wait after FPGA configuration. The default is 272511ccc33fSMarcel Ziswiler 200 ms. 2726c609719bSwdenk 2727c609719bSwdenk- Configuration Management: 2728b2b8a696SStefan Roese CONFIG_BUILD_TARGET 2729b2b8a696SStefan Roese 2730b2b8a696SStefan Roese Some SoCs need special image types (e.g. U-Boot binary 2731b2b8a696SStefan Roese with a special header) as build targets. By defining 2732b2b8a696SStefan Roese CONFIG_BUILD_TARGET in the SoC / board header, this 2733b2b8a696SStefan Roese special image will be automatically built upon calling 2734b2b8a696SStefan Roese make / MAKEALL. 2735b2b8a696SStefan Roese 2736c609719bSwdenk CONFIG_IDENT_STRING 2737c609719bSwdenk 2738c609719bSwdenk If defined, this string will be added to the U-Boot 2739c609719bSwdenk version information (U_BOOT_VERSION) 2740c609719bSwdenk 2741c609719bSwdenk- Vendor Parameter Protection: 2742c609719bSwdenk 2743c609719bSwdenk U-Boot considers the values of the environment 2744c609719bSwdenk variables "serial#" (Board Serial Number) and 27457152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2746c609719bSwdenk are set once by the board vendor / manufacturer, and 2747c609719bSwdenk protects these variables from casual modification by 2748c609719bSwdenk the user. Once set, these variables are read-only, 2749c609719bSwdenk and write or delete attempts are rejected. You can 275011ccc33fSMarcel Ziswiler change this behaviour: 2751c609719bSwdenk 2752c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2753c609719bSwdenk file, the write protection for vendor parameters is 275447cd00faSwdenk completely disabled. Anybody can change or delete 2755c609719bSwdenk these parameters. 2756c609719bSwdenk 2757c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2758c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 275911ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2760c609719bSwdenk which can be changed exactly ONCE by the user. [The 2761c609719bSwdenk serial# is unaffected by this, i. e. it remains 2762c609719bSwdenk read-only.] 2763c609719bSwdenk 27642598090bSJoe Hershberger The same can be accomplished in a more flexible way 27652598090bSJoe Hershberger for any variable by configuring the type of access 27662598090bSJoe Hershberger to allow for those variables in the ".flags" variable 27672598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 27682598090bSJoe Hershberger 2769c609719bSwdenk- Protected RAM: 2770c609719bSwdenk CONFIG_PRAM 2771c609719bSwdenk 2772c609719bSwdenk Define this variable to enable the reservation of 2773c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2774c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2775c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2776c609719bSwdenk this default value by defining an environment 2777c609719bSwdenk variable "pram" to the number of kB you want to 2778c609719bSwdenk reserve. Note that the board info structure will 2779c609719bSwdenk still show the full amount of RAM. If pRAM is 2780c609719bSwdenk reserved, a new environment variable "mem" will 2781c609719bSwdenk automatically be defined to hold the amount of 2782c609719bSwdenk remaining RAM in a form that can be passed as boot 2783c609719bSwdenk argument to Linux, for instance like that: 2784c609719bSwdenk 2785fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2786c609719bSwdenk saveenv 2787c609719bSwdenk 2788c609719bSwdenk This way you can tell Linux not to use this memory, 2789c609719bSwdenk either, which results in a memory region that will 2790c609719bSwdenk not be affected by reboots. 2791c609719bSwdenk 2792c609719bSwdenk *WARNING* If your board configuration uses automatic 2793c609719bSwdenk detection of the RAM size, you must make sure that 2794c609719bSwdenk this memory test is non-destructive. So far, the 2795c609719bSwdenk following board configurations are known to be 2796c609719bSwdenk "pRAM-clean": 2797c609719bSwdenk 27981b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 27991b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2800544d97e9SWolfgang Denk FLAGADM, TQM8260 2801c609719bSwdenk 280240fef049SGabe Black- Access to physical memory region (> 4GB) 280340fef049SGabe Black Some basic support is provided for operations on memory not 280440fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 280540fef049SGabe Black support access to more than 4GB of memory on 32-bit 280640fef049SGabe Black machines using physical address extension or similar. 280740fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 280840fef049SGabe Black currently only supports clearing the memory. 280940fef049SGabe Black 2810c609719bSwdenk- Error Recovery: 2811c609719bSwdenk CONFIG_PANIC_HANG 2812c609719bSwdenk 2813c609719bSwdenk Define this variable to stop the system in case of a 2814c609719bSwdenk fatal error, so that you have to reset it manually. 2815c609719bSwdenk This is probably NOT a good idea for an embedded 281611ccc33fSMarcel Ziswiler system where you want the system to reboot 2817c609719bSwdenk automatically as fast as possible, but it may be 2818c609719bSwdenk useful during development since you can try to debug 2819c609719bSwdenk the conditions that lead to the situation. 2820c609719bSwdenk 2821c609719bSwdenk CONFIG_NET_RETRY_COUNT 2822c609719bSwdenk 2823c609719bSwdenk This variable defines the number of retries for 2824c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2825c609719bSwdenk before giving up the operation. If not defined, a 2826c609719bSwdenk default value of 5 is used. 2827c609719bSwdenk 282840cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 282940cb90eeSGuennadi Liakhovetski 283040cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 283140cb90eeSGuennadi Liakhovetski 283248a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 283348a3e999STetsuyuki Kobayashi 283448a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 283548a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 283648a3e999STetsuyuki Kobayashi try longer timeout such as 283748a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 283848a3e999STetsuyuki Kobayashi 2839c609719bSwdenk- Command Interpreter: 28408078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 284104a85b3bSwdenk 284204a85b3bSwdenk Enable auto completion of commands using TAB. 284304a85b3bSwdenk 28446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2845c609719bSwdenk 2846c609719bSwdenk Define this variable to enable the "hush" shell (from 2847c609719bSwdenk Busybox) as command line interpreter, thus enabling 2848c609719bSwdenk powerful command line syntax like 2849c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2850c609719bSwdenk constructs ("shell scripts"). 2851c609719bSwdenk 2852c609719bSwdenk If undefined, you get the old, much simpler behaviour 2853c609719bSwdenk with a somewhat smaller memory footprint. 2854c609719bSwdenk 2855c609719bSwdenk 28566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2857c609719bSwdenk 2858c609719bSwdenk This defines the secondary prompt string, which is 2859c609719bSwdenk printed when the command interpreter needs more input 2860c609719bSwdenk to complete a command. Usually "> ". 2861c609719bSwdenk 2862c609719bSwdenk Note: 2863c609719bSwdenk 2864c609719bSwdenk In the current implementation, the local variables 2865c609719bSwdenk space and global environment variables space are 2866c609719bSwdenk separated. Local variables are those you define by 28673b57fe0aSwdenk simply typing `name=value'. To access a local 2868c609719bSwdenk variable later on, you have write `$name' or 28693b57fe0aSwdenk `${name}'; to execute the contents of a variable 28703b57fe0aSwdenk directly type `$name' at the command prompt. 2871c609719bSwdenk 2872c609719bSwdenk Global environment variables are those you use 2873c609719bSwdenk setenv/printenv to work with. To run a command stored 2874c609719bSwdenk in such a variable, you need to use the run command, 2875c609719bSwdenk and you must not use the '$' sign to access them. 2876c609719bSwdenk 2877c609719bSwdenk To store commands and special characters in a 2878c609719bSwdenk variable, please use double quotation marks 2879c609719bSwdenk surrounding the whole text of the variable, instead 2880c609719bSwdenk of the backslashes before semicolons and special 2881c609719bSwdenk symbols. 2882c609719bSwdenk 2883aa0c71acSWolfgang Denk- Commandline Editing and History: 2884aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2885aa0c71acSWolfgang Denk 288611ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2887aa0c71acSWolfgang Denk commandline input operations 2888aa0c71acSWolfgang Denk 2889a8c7c708Swdenk- Default Environment: 2890c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2891c609719bSwdenk 2892c609719bSwdenk Define this to contain any number of null terminated 2893c609719bSwdenk strings (variable = value pairs) that will be part of 28947152b1d0Swdenk the default environment compiled into the boot image. 28952262cfeeSwdenk 2896c609719bSwdenk For example, place something like this in your 2897c609719bSwdenk board's config file: 2898c609719bSwdenk 2899c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2900c609719bSwdenk "myvar1=value1\0" \ 2901c609719bSwdenk "myvar2=value2\0" 2902c609719bSwdenk 2903c609719bSwdenk Warning: This method is based on knowledge about the 2904c609719bSwdenk internal format how the environment is stored by the 29052262cfeeSwdenk U-Boot code. This is NOT an official, exported 2906c609719bSwdenk interface! Although it is unlikely that this format 29077152b1d0Swdenk will change soon, there is no guarantee either. 2908c609719bSwdenk You better know what you are doing here. 2909c609719bSwdenk 2910c609719bSwdenk Note: overly (ab)use of the default environment is 2911c609719bSwdenk discouraged. Make sure to check other ways to preset 291274de7aefSWolfgang Denk the environment like the "source" command or the 2913c609719bSwdenk boot command first. 2914c609719bSwdenk 29155e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 29165e724ca2SStephen Warren 29175e724ca2SStephen Warren Define this in order to add variables describing the 29185e724ca2SStephen Warren U-Boot build configuration to the default environment. 29195e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 29205e724ca2SStephen Warren 29215e724ca2SStephen Warren Enabling this option will cause the following to be defined: 29225e724ca2SStephen Warren 29235e724ca2SStephen Warren - CONFIG_SYS_ARCH 29245e724ca2SStephen Warren - CONFIG_SYS_CPU 29255e724ca2SStephen Warren - CONFIG_SYS_BOARD 29265e724ca2SStephen Warren - CONFIG_SYS_VENDOR 29275e724ca2SStephen Warren - CONFIG_SYS_SOC 29285e724ca2SStephen Warren 29297e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 29307e27f89fSTom Rini 29317e27f89fSTom Rini Define this in order to add variables describing certain 29327e27f89fSTom Rini run-time determined information about the hardware to the 29337e27f89fSTom Rini environment. These will be named board_name, board_rev. 29347e27f89fSTom Rini 293506fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 293606fd8538SSimon Glass 293706fd8538SSimon Glass Normally the environment is loaded when the board is 293806fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 293906fd8538SSimon Glass that so that the environment is not available until 294006fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 294106fd8538SSimon Glass this is instead controlled by the value of 294206fd8538SSimon Glass /config/load-environment. 294306fd8538SSimon Glass 2944a8c7c708Swdenk- DataFlash Support: 29452abbe075Swdenk CONFIG_HAS_DATAFLASH 29462abbe075Swdenk 29472abbe075Swdenk Defining this option enables DataFlash features and 29482abbe075Swdenk allows to read/write in Dataflash via the standard 29492abbe075Swdenk commands cp, md... 29502abbe075Swdenk 2951f61ec45eSEric Nelson- Serial Flash support 2952f61ec45eSEric Nelson CONFIG_CMD_SF 2953f61ec45eSEric Nelson 2954f61ec45eSEric Nelson Defining this option enables SPI flash commands 2955f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2956f61ec45eSEric Nelson 2957f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2958f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2959f61ec45eSEric Nelson commands. 2960f61ec45eSEric Nelson 2961f61ec45eSEric Nelson The following defaults may be provided by the platform 2962f61ec45eSEric Nelson to handle the common case when only a single serial 2963f61ec45eSEric Nelson flash is present on the system. 2964f61ec45eSEric Nelson 2965f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2966f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2967f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2968f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2969f61ec45eSEric Nelson 297024007273SSimon Glass CONFIG_CMD_SF_TEST 297124007273SSimon Glass 297224007273SSimon Glass Define this option to include a destructive SPI flash 297324007273SSimon Glass test ('sf test'). 297424007273SSimon Glass 29751dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 29761dcd6d03SJagannadha Sutradharudu Teki 29771dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 29781dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 29791dcd6d03SJagannadha Sutradharudu Teki 2980b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2981b902e07cSJagannadha Sutradharudu Teki 2982b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2983b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2984b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2985b902e07cSJagannadha Sutradharudu Teki 2986562f8df1SHeiko Schocher CONFIG_SYS_SPI_ST_ENABLE_WP_PIN 2987562f8df1SHeiko Schocher enable the W#/Vpp signal to disable writing to the status 2988562f8df1SHeiko Schocher register on ST MICRON flashes like the N25Q128. 2989562f8df1SHeiko Schocher The status register write enable/disable bit, combined with 2990562f8df1SHeiko Schocher the W#/VPP signal provides hardware data protection for the 2991562f8df1SHeiko Schocher device as follows: When the enable/disable bit is set to 1, 2992562f8df1SHeiko Schocher and the W#/VPP signal is driven LOW, the status register 2993562f8df1SHeiko Schocher nonvolatile bits become read-only and the WRITE STATUS REGISTER 2994562f8df1SHeiko Schocher operation will not execute. The only way to exit this 2995562f8df1SHeiko Schocher hardware-protected mode is to drive W#/VPP HIGH. 2996562f8df1SHeiko Schocher 29973f85ce27Swdenk- SystemACE Support: 29983f85ce27Swdenk CONFIG_SYSTEMACE 29993f85ce27Swdenk 30003f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 30013f85ce27Swdenk chips attached via some sort of local bus. The address 300211ccc33fSMarcel Ziswiler of the chip must also be defined in the 30036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 30043f85ce27Swdenk 30053f85ce27Swdenk #define CONFIG_SYSTEMACE 30066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 30073f85ce27Swdenk 30083f85ce27Swdenk When SystemACE support is added, the "ace" device type 30093f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 30103f85ce27Swdenk 3011ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 3012ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 3013ecb0ccd9SWolfgang Denk 301428cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 3015ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 301628cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 3017ecb0ccd9SWolfgang Denk number generator is used. 3018ecb0ccd9SWolfgang Denk 301928cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 302028cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 302128cb9375SWolfgang Denk defined, the normal port 69 is used. 302228cb9375SWolfgang Denk 302328cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 3024ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 3025ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 3026ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 3027ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 3028ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 3029ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 3030ecb0ccd9SWolfgang Denk 3031bf36c5d5SSimon Glass- Hashing support: 3032bf36c5d5SSimon Glass CONFIG_CMD_HASH 3033bf36c5d5SSimon Glass 3034bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 3035bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 3036bf36c5d5SSimon Glass 3037bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 3038bf36c5d5SSimon Glass 3039bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 3040bf36c5d5SSimon Glass size a little. 3041bf36c5d5SSimon Glass 3042bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 3043bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 3044bf36c5d5SSimon Glass 3045bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 3046bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 3047bf36c5d5SSimon Glass 3048a11f1873SRobert Winkler- Freescale i.MX specific commands: 3049a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 3050a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 3051a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 3052a11f1873SRobert Winkler 3053a11f1873SRobert Winkler CONFIG_CMD_BMODE 3054a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 3055a11f1873SRobert Winkler a boot from specific media. 3056a11f1873SRobert Winkler 3057a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 3058a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 3059a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 3060a11f1873SRobert Winkler will set it back to normal. This command currently 3061a11f1873SRobert Winkler supports i.MX53 and i.MX6. 3062a11f1873SRobert Winkler 306319c402afSSimon Glass- Signing support: 306419c402afSSimon Glass CONFIG_RSA 306519c402afSSimon Glass 306619c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 30678bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 306819c402afSSimon Glass 306919c402afSSimon Glass The signing part is build into mkimage regardless of this 307019c402afSSimon Glass option. 307119c402afSSimon Glass 30729e50c406SHeiko Schocher- bootcount support: 30739e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 30749e50c406SHeiko Schocher 30759e50c406SHeiko Schocher This enables the bootcounter support, see: 30769e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 30779e50c406SHeiko Schocher 30789e50c406SHeiko Schocher CONFIG_AT91SAM9XE 30799e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 30809e50c406SHeiko Schocher CONFIG_BLACKFIN 30819e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 30829e50c406SHeiko Schocher CONFIG_SOC_DA8XX 30839e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 30849e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 30859e50c406SHeiko Schocher enable support for the bootcounter in RAM 30869e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 30879e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 30889e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 30899e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 30909e50c406SHeiko Schocher the bootcounter. 30919e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 309219c402afSSimon Glass 3093a8c7c708Swdenk- Show boot progress: 3094c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 3095c609719bSwdenk 3096c609719bSwdenk Defining this option allows to add some board- 3097c609719bSwdenk specific code (calling a user-provided function 3098c609719bSwdenk "show_boot_progress(int)") that enables you to show 3099c609719bSwdenk the system's boot progress on some display (for 3100c609719bSwdenk example, some LED's) on your board. At the moment, 3101c609719bSwdenk the following checkpoints are implemented: 3102c609719bSwdenk 31033a608ca0SSimon Glass- Detailed boot stage timing 31043a608ca0SSimon Glass CONFIG_BOOTSTAGE 31053a608ca0SSimon Glass Define this option to get detailed timing of each stage 31063a608ca0SSimon Glass of the boot process. 31073a608ca0SSimon Glass 31083a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 31093a608ca0SSimon Glass This is the number of available user bootstage records. 31103a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 31113a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 31123a608ca0SSimon Glass the limit, recording will stop. 31133a608ca0SSimon Glass 31143a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 31153a608ca0SSimon Glass Define this to print a report before boot, similar to this: 31163a608ca0SSimon Glass 31173a608ca0SSimon Glass Timer summary in microseconds: 31183a608ca0SSimon Glass Mark Elapsed Stage 31193a608ca0SSimon Glass 0 0 reset 31203a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 31213a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 31223a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 31233a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 31243a608ca0SSimon Glass 3,910,375 250,777 main_loop 31253a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 31263a608ca0SSimon Glass 30,361,327 445,160 start_kernel 31273a608ca0SSimon Glass 31282eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 31292eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 31302eba38cfSSimon Glass and un/stashing of bootstage data. 31312eba38cfSSimon Glass 313294fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 313394fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 313494fd1316SSimon Glass node is created with each bootstage id as a child. Each child 313594fd1316SSimon Glass has a 'name' property and either 'mark' containing the 313694fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 313794fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 313894fd1316SSimon Glass For example: 313994fd1316SSimon Glass 314094fd1316SSimon Glass bootstage { 314194fd1316SSimon Glass 154 { 314294fd1316SSimon Glass name = "board_init_f"; 314394fd1316SSimon Glass mark = <3575678>; 314494fd1316SSimon Glass }; 314594fd1316SSimon Glass 170 { 314694fd1316SSimon Glass name = "lcd"; 314794fd1316SSimon Glass accum = <33482>; 314894fd1316SSimon Glass }; 314994fd1316SSimon Glass }; 315094fd1316SSimon Glass 315194fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 315294fd1316SSimon Glass 31531372cce2SMarian BalakowiczLegacy uImage format: 31541372cce2SMarian Balakowicz 3155c609719bSwdenk Arg Where When 3156c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3157c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3158c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3159c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3160c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3161c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3162c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3163c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3164c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 31651372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3166c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3167c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3168c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3169c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 31701372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3171c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 31721372cce2SMarian Balakowicz 31731372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 31741372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 31751372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 31761372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 31771372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 31781372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 31791372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 318011ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 31811372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 31821372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 31831372cce2SMarian Balakowicz 3184ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3185c609719bSwdenk 3186a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 318763e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 318863e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 318963e73c9aSwdenk 3190566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3191566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3192566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3193566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3194566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3195566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3196566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3197566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3198566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3199566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3200566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3201566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3202566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3203566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3204566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3205566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3206566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3207566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3208566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3209566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3210566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3211566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3212566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3213566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3214566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3215566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3216566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3217566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3218566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3219566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3220566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3221566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3222566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3223566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3224566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3225566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3226566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3227566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3228566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3229566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3230566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3231566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3232566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3233566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3234566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3235566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3236566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3237c609719bSwdenk 3238566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3239c609719bSwdenk 3240566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3241566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3242566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3243206c60cbSwdenk 3244566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3245566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 324611ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3247566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3248566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3249566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 325074de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 325174de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3252566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3253c609719bSwdenk 32541372cce2SMarian BalakowiczFIT uImage format: 32551372cce2SMarian Balakowicz 32561372cce2SMarian Balakowicz Arg Where When 32571372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 32581372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 32591372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 32601372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 32611372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 32621372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3263f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 32641372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 32651372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 32661372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 32671372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 32681372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 326911ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 327011ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 32711372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 32721372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 32731372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 32741372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 32751372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 32761372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 32771372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 32781372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 32791372cce2SMarian Balakowicz 32801372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 32811372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 32821372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 328311ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 32841372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 32851372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 32861372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 32871372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 32881372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 32891372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 32901372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 32911372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 32921372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 32931372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 32941372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 32951372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 32961372cce2SMarian Balakowicz 329711ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 32981372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 32991372cce2SMarian Balakowicz 330011ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 33011372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 33021372cce2SMarian Balakowicz 330311ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 33041372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 33051372cce2SMarian Balakowicz 330621d29f7fSHeiko Schocher- legacy image format: 330721d29f7fSHeiko Schocher CONFIG_IMAGE_FORMAT_LEGACY 330821d29f7fSHeiko Schocher enables the legacy image format support in U-Boot. 330921d29f7fSHeiko Schocher 331021d29f7fSHeiko Schocher Default: 331121d29f7fSHeiko Schocher enabled if CONFIG_FIT_SIGNATURE is not defined. 331221d29f7fSHeiko Schocher 331321d29f7fSHeiko Schocher CONFIG_DISABLE_IMAGE_LEGACY 331421d29f7fSHeiko Schocher disable the legacy image format 331521d29f7fSHeiko Schocher 331621d29f7fSHeiko Schocher This define is introduced, as the legacy image format is 331721d29f7fSHeiko Schocher enabled per default for backward compatibility. 331821d29f7fSHeiko Schocher 3319d95f6ec7SGabe Black- FIT image support: 3320d95f6ec7SGabe Black CONFIG_FIT 3321d95f6ec7SGabe Black Enable support for the FIT uImage format. 3322d95f6ec7SGabe Black 3323d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3324d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3325d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3326d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3327d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3328d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3329d95f6ec7SGabe Black 33303e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 33313e569a6bSSimon Glass This option enables signature verification of FIT uImages, 33323e569a6bSSimon Glass using a hash signed and verified using RSA. See 33333e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 33343e569a6bSSimon Glass 333521d29f7fSHeiko Schocher WARNING: When relying on signed FIT images with required 333621d29f7fSHeiko Schocher signature check the legacy image format is default 333721d29f7fSHeiko Schocher disabled. If a board need legacy image format support 333821d29f7fSHeiko Schocher enable this through CONFIG_IMAGE_FORMAT_LEGACY 333921d29f7fSHeiko Schocher 33409a4f479bSDirk Eibach CONFIG_FIT_DISABLE_SHA256 33419a4f479bSDirk Eibach Supporting SHA256 hashes has quite an impact on binary size. 33429a4f479bSDirk Eibach For constrained systems sha256 hash support can be disabled 33439a4f479bSDirk Eibach with this option. 33449a4f479bSDirk Eibach 33454cf2609bSWolfgang Denk- Standalone program support: 33464cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 33474cf2609bSWolfgang Denk 33486feff899SWolfgang Denk This option defines a board specific value for the 33496feff899SWolfgang Denk address where standalone program gets loaded, thus 33506feff899SWolfgang Denk overwriting the architecture dependent default 33514cf2609bSWolfgang Denk settings. 33524cf2609bSWolfgang Denk 33534cf2609bSWolfgang Denk- Frame Buffer Address: 33544cf2609bSWolfgang Denk CONFIG_FB_ADDR 33554cf2609bSWolfgang Denk 33564cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 335744a53b57SWolfgang Denk address for frame buffer. This is typically the case 335844a53b57SWolfgang Denk when using a graphics controller has separate video 335944a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 336044a53b57SWolfgang Denk the given address instead of dynamically reserving it 336144a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 336244a53b57SWolfgang Denk the memory for the frame buffer depending on the 336344a53b57SWolfgang Denk configured panel size. 33644cf2609bSWolfgang Denk 33654cf2609bSWolfgang Denk Please see board_init_f function. 33664cf2609bSWolfgang Denk 3367cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3368cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3369cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3370cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3371cccfc2abSDetlev Zundel 3372cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3373cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3374cccfc2abSDetlev Zundel 3375cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3376cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3377cccfc2abSDetlev Zundel 3378cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3379cccfc2abSDetlev Zundel Needed for mtdparts command support. 3380cccfc2abSDetlev Zundel 3381cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3382cccfc2abSDetlev Zundel 3383cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3384cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3385cccfc2abSDetlev Zundel 3386ff94bc40SHeiko Schocher CONFIG_MTD_NAND_VERIFY_WRITE 3387ff94bc40SHeiko Schocher verify if the written data is correct reread. 3388ff94bc40SHeiko Schocher 338970c219cdSJoe Hershberger- UBI support 339070c219cdSJoe Hershberger CONFIG_CMD_UBI 339170c219cdSJoe Hershberger 339270c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 339370c219cdSJoe Hershberger with the UBI flash translation layer 339470c219cdSJoe Hershberger 339570c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 339670c219cdSJoe Hershberger 3397147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3398147162daSJoe Hershberger 3399147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3400147162daSJoe Hershberger warnings and errors enabled. 3401147162daSJoe Hershberger 3402ff94bc40SHeiko Schocher 3403ff94bc40SHeiko Schocher CONFIG_MTD_UBI_WL_THRESHOLD 3404ff94bc40SHeiko Schocher This parameter defines the maximum difference between the highest 3405ff94bc40SHeiko Schocher erase counter value and the lowest erase counter value of eraseblocks 3406ff94bc40SHeiko Schocher of UBI devices. When this threshold is exceeded, UBI starts performing 3407ff94bc40SHeiko Schocher wear leveling by means of moving data from eraseblock with low erase 3408ff94bc40SHeiko Schocher counter to eraseblocks with high erase counter. 3409ff94bc40SHeiko Schocher 3410ff94bc40SHeiko Schocher The default value should be OK for SLC NAND flashes, NOR flashes and 3411ff94bc40SHeiko Schocher other flashes which have eraseblock life-cycle 100000 or more. 3412ff94bc40SHeiko Schocher However, in case of MLC NAND flashes which typically have eraseblock 3413ff94bc40SHeiko Schocher life-cycle less than 10000, the threshold should be lessened (e.g., 3414ff94bc40SHeiko Schocher to 128 or 256, although it does not have to be power of 2). 3415ff94bc40SHeiko Schocher 3416ff94bc40SHeiko Schocher default: 4096 3417ff94bc40SHeiko Schocher 3418ff94bc40SHeiko Schocher CONFIG_MTD_UBI_BEB_LIMIT 3419ff94bc40SHeiko Schocher This option specifies the maximum bad physical eraseblocks UBI 3420ff94bc40SHeiko Schocher expects on the MTD device (per 1024 eraseblocks). If the 3421ff94bc40SHeiko Schocher underlying flash does not admit of bad eraseblocks (e.g. NOR 3422ff94bc40SHeiko Schocher flash), this value is ignored. 3423ff94bc40SHeiko Schocher 3424ff94bc40SHeiko Schocher NAND datasheets often specify the minimum and maximum NVM 3425ff94bc40SHeiko Schocher (Number of Valid Blocks) for the flashes' endurance lifetime. 3426ff94bc40SHeiko Schocher The maximum expected bad eraseblocks per 1024 eraseblocks 3427ff94bc40SHeiko Schocher then can be calculated as "1024 * (1 - MinNVB / MaxNVB)", 3428ff94bc40SHeiko Schocher which gives 20 for most NANDs (MaxNVB is basically the total 3429ff94bc40SHeiko Schocher count of eraseblocks on the chip). 3430ff94bc40SHeiko Schocher 3431ff94bc40SHeiko Schocher To put it differently, if this value is 20, UBI will try to 3432ff94bc40SHeiko Schocher reserve about 1.9% of physical eraseblocks for bad blocks 3433ff94bc40SHeiko Schocher handling. And that will be 1.9% of eraseblocks on the entire 3434ff94bc40SHeiko Schocher NAND chip, not just the MTD partition UBI attaches. This means 3435ff94bc40SHeiko Schocher that if you have, say, a NAND flash chip admits maximum 40 bad 3436ff94bc40SHeiko Schocher eraseblocks, and it is split on two MTD partitions of the same 3437ff94bc40SHeiko Schocher size, UBI will reserve 40 eraseblocks when attaching a 3438ff94bc40SHeiko Schocher partition. 3439ff94bc40SHeiko Schocher 3440ff94bc40SHeiko Schocher default: 20 3441ff94bc40SHeiko Schocher 3442ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP 3443ff94bc40SHeiko Schocher Fastmap is a mechanism which allows attaching an UBI device 3444ff94bc40SHeiko Schocher in nearly constant time. Instead of scanning the whole MTD device it 3445ff94bc40SHeiko Schocher only has to locate a checkpoint (called fastmap) on the device. 3446ff94bc40SHeiko Schocher The on-flash fastmap contains all information needed to attach 3447ff94bc40SHeiko Schocher the device. Using fastmap makes only sense on large devices where 3448ff94bc40SHeiko Schocher attaching by scanning takes long. UBI will not automatically install 3449ff94bc40SHeiko Schocher a fastmap on old images, but you can set the UBI parameter 3450ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT to 1 if you want so. Please note 3451ff94bc40SHeiko Schocher that fastmap-enabled images are still usable with UBI implementations 3452ff94bc40SHeiko Schocher without fastmap support. On typical flash devices the whole fastmap 3453ff94bc40SHeiko Schocher fits into one PEB. UBI will reserve PEBs to hold two fastmaps. 3454ff94bc40SHeiko Schocher 3455ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 3456ff94bc40SHeiko Schocher Set this parameter to enable fastmap automatically on images 3457ff94bc40SHeiko Schocher without a fastmap. 3458ff94bc40SHeiko Schocher default: 0 3459ff94bc40SHeiko Schocher 346070c219cdSJoe Hershberger- UBIFS support 346170c219cdSJoe Hershberger CONFIG_CMD_UBIFS 346270c219cdSJoe Hershberger 346370c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 346470c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 346570c219cdSJoe Hershberger 346670c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 346770c219cdSJoe Hershberger 3468147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3469147162daSJoe Hershberger 3470147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3471147162daSJoe Hershberger warnings and errors enabled. 3472147162daSJoe Hershberger 34736a11cf48SDaniel Schwierzeck- SPL framework 34746a11cf48SDaniel Schwierzeck CONFIG_SPL 34756a11cf48SDaniel Schwierzeck Enable building of SPL globally. 34766a11cf48SDaniel Schwierzeck 347795579793STom Rini CONFIG_SPL_LDSCRIPT 347895579793STom Rini LDSCRIPT for linking the SPL binary. 347995579793STom Rini 34806ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 34816ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 34826ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 34836ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 34848960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 34856ebc3461SAlbert ARIBAUD must not be both defined at the same time. 34866ebc3461SAlbert ARIBAUD 348795579793STom Rini CONFIG_SPL_MAX_SIZE 34886ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 34896ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 34906ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 34916ebc3461SAlbert ARIBAUD not exceed it. 349295579793STom Rini 34936a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 34946a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 34956a11cf48SDaniel Schwierzeck 349694a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 349794a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 349894a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 349994a45bb1SScott Wood 350095579793STom Rini CONFIG_SPL_BSS_START_ADDR 350195579793STom Rini Link address for the BSS within the SPL binary. 350295579793STom Rini 350395579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 35046ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 35056ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 35066ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 35078960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 35086ebc3461SAlbert ARIBAUD must not be both defined at the same time. 350995579793STom Rini 351095579793STom Rini CONFIG_SPL_STACK 351195579793STom Rini Adress of the start of the stack SPL will use 351295579793STom Rini 351394a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 351494a45bb1SScott Wood Adress of the start of the stack SPL will use after 351594a45bb1SScott Wood relocation. If unspecified, this is equal to 351694a45bb1SScott Wood CONFIG_SPL_STACK. 351794a45bb1SScott Wood 351895579793STom Rini CONFIG_SYS_SPL_MALLOC_START 351995579793STom Rini Starting address of the malloc pool used in SPL. 352095579793STom Rini 352195579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 352295579793STom Rini The size of the malloc pool used in SPL. 35236a11cf48SDaniel Schwierzeck 352447f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 352547f7bcaeSTom Rini Enable the SPL framework under common/. This framework 352647f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 352747f7bcaeSTom Rini NAND loading of the Linux Kernel. 352847f7bcaeSTom Rini 35299607faf2STom Rini CONFIG_SPL_OS_BOOT 35309607faf2STom Rini Enable booting directly to an OS from SPL. 35319607faf2STom Rini See also: doc/README.falcon 35329607faf2STom Rini 3533861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3534861a86f4STom Rini For ARM, enable an optional function to print more information 3535861a86f4STom Rini about the running system. 3536861a86f4STom Rini 35374b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 35384b919725SScott Wood Arch init code should be built for a very small image 35394b919725SScott Wood 35406a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 35416a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 35426a11cf48SDaniel Schwierzeck 35436a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 35446a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 35456a11cf48SDaniel Schwierzeck 35466a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 35476a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 35486a11cf48SDaniel Schwierzeck 35496a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 35506a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 35516a11cf48SDaniel Schwierzeck 35526a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 35536a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 35546a11cf48SDaniel Schwierzeck 355595579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 355695579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 3557fae81c72SGuillaume GARDET CONFIG_SYS_MMC_SD_FS_BOOT_PARTITION 355895579793STom Rini Address, size and partition on the MMC to load U-Boot from 355995579793STom Rini when the MMC is being used in raw mode. 356095579793STom Rini 35612b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 35622b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 35632b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 35642b75b0adSPeter Korsgaard 35652b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 35662b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 35672b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 35682b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 35692b75b0adSPeter Korsgaard (for falcon mode) 35702b75b0adSPeter Korsgaard 357195579793STom Rini CONFIG_SPL_FAT_SUPPORT 357295579793STom Rini Support for fs/fat/libfat.o in SPL binary 357395579793STom Rini 3574fae81c72SGuillaume GARDET CONFIG_SPL_EXT_SUPPORT 3575fae81c72SGuillaume GARDET Support for EXT filesystem in SPL binary 357695579793STom Rini 3577fae81c72SGuillaume GARDET CONFIG_SPL_FS_LOAD_PAYLOAD_NAME 3578fae81c72SGuillaume GARDET Filename to read to load U-Boot when reading from filesystem 3579fae81c72SGuillaume GARDET 3580fae81c72SGuillaume GARDET CONFIG_SPL_FS_LOAD_KERNEL_NAME 35817ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 3582fae81c72SGuillaume GARDET from filesystem (for Falcon mode) 35837ad2cc79SPeter Korsgaard 3584fae81c72SGuillaume GARDET CONFIG_SPL_FS_LOAD_ARGS_NAME 35857ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 3586fae81c72SGuillaume GARDET when reading from filesystem (for Falcon mode) 35877ad2cc79SPeter Korsgaard 358806f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 358906f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 359006f60ae3SScott Wood start.S waits for the rest of the SPL to load before 359106f60ae3SScott Wood continuing (the hardware starts execution after just 359206f60ae3SScott Wood loading the first page rather than the full 4K). 359306f60ae3SScott Wood 3594651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3595651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3596651fcf60SPrabhakar Kushwaha 35976f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 35986f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 35996f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 36006f2f01b9SScott Wood 36016f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 36026f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 36036f2f01b9SScott Wood 36046f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 36056f2f01b9SScott Wood Include standard software ECC in the SPL 36066f2f01b9SScott Wood 360795579793STom Rini CONFIG_SPL_NAND_SIMPLE 36087d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 36097d4b7955SScott Wood expose the cmd_ctrl() interface. 361095579793STom Rini 36116dd3b566STom Rini CONFIG_SPL_MTD_SUPPORT 36126dd3b566STom Rini Support for the MTD subsystem within SPL. Useful for 36136dd3b566STom Rini environment on NAND support within SPL. 36146dd3b566STom Rini 36150c3117b1SHeiko Schocher CONFIG_SPL_NAND_RAW_ONLY 36160c3117b1SHeiko Schocher Support to boot only raw u-boot.bin images. Use this only 36170c3117b1SHeiko Schocher if you need to save space. 36180c3117b1SHeiko Schocher 3619bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3620bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 36215614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3622bb0dc108SYing Zhang 36237c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 36247c8eea59SYing Zhang Set for common ddr init with serial presence detect in 36257c8eea59SYing Zhang SPL binary. 36267c8eea59SYing Zhang 362795579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 362895579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 362995579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 363095579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 363195579793STom Rini CONFIG_SYS_NAND_ECCBYTES 363295579793STom Rini Defines the size and behavior of the NAND that SPL uses 36337d4b7955SScott Wood to read U-Boot 363495579793STom Rini 3635fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3636fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3637fbe76ae4SPrabhakar Kushwaha 363895579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 36397d4b7955SScott Wood Location in NAND to read U-Boot from 36407d4b7955SScott Wood 36417d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 36427d4b7955SScott Wood Location in memory to load U-Boot to 36437d4b7955SScott Wood 36447d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 36457d4b7955SScott Wood Size of image to load 364695579793STom Rini 364795579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 36487d4b7955SScott Wood Entry point in loaded image to jump to 364995579793STom Rini 365095579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 365195579793STom Rini Define this if you need to first read the OOB and then the 365295579793STom Rini data. This is used for example on davinci plattforms. 365395579793STom Rini 365495579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 365595579793STom Rini Support for an OMAP3-specific set of functions to return the 365695579793STom Rini ID and MFR of the first attached NAND chip, if present. 365795579793STom Rini 36586a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 36596a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 36606a11cf48SDaniel Schwierzeck 36616a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 36626a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 36636a11cf48SDaniel Schwierzeck 36646a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 36656a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 36666a11cf48SDaniel Schwierzeck 3667c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3668c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3669c57b953dSPavel Machek 36706a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 36716a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 36721372cce2SMarian Balakowicz 3673ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3674ba1bee43SYing Zhang Support for the environment operating in SPL binary 3675ba1bee43SYing Zhang 3676ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3677ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3678ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3679ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3680ba1bee43SYing Zhang 368174752baaSScott Wood CONFIG_SPL_PAD_TO 36826113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 36836113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 36846113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36856113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36866113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 368774752baaSScott Wood 3688ca2fca22SScott Wood CONFIG_SPL_TARGET 3689ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3690ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3691ca2fca22SScott Wood example if more than one image needs to be produced. 3692ca2fca22SScott Wood 369387ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 369487ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 369587ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 369687ebee39SSimon Glass option to re-enable it. This will affect the output of the 369787ebee39SSimon Glass bootm command when booting a FIT image. 369887ebee39SSimon Glass 36993aa29de0SYing Zhang- TPL framework 37003aa29de0SYing Zhang CONFIG_TPL 37013aa29de0SYing Zhang Enable building of TPL globally. 37023aa29de0SYing Zhang 37033aa29de0SYing Zhang CONFIG_TPL_PAD_TO 37043aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 37053aa29de0SYing Zhang the TPL payload. By default, this is defined as 37063aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 37073aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 37083aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 37093aa29de0SYing Zhang 3710c609719bSwdenkModem Support: 3711c609719bSwdenk-------------- 3712c609719bSwdenk 3713566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3714c609719bSwdenk 371511ccc33fSMarcel Ziswiler- Modem support enable: 3716c609719bSwdenk CONFIG_MODEM_SUPPORT 3717c609719bSwdenk 3718c609719bSwdenk- RTS/CTS Flow control enable: 3719c609719bSwdenk CONFIG_HWFLOW 3720c609719bSwdenk 3721c609719bSwdenk- Modem debug support: 3722c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3723c609719bSwdenk 3724c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3725c609719bSwdenk for modem support. Useful only with BDI2000. 3726c609719bSwdenk 3727a8c7c708Swdenk- Interrupt support (PPC): 3728a8c7c708Swdenk 3729a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3730a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 373111ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3732a8c7c708Swdenk should set decrementer_count to appropriate value. If 373311ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3734a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 373511ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3736a8c7c708Swdenk specific handling. If board has watchdog / status_led 3737a8c7c708Swdenk / other_activity_monitor it works automatically from 3738a8c7c708Swdenk general timer_interrupt(). 3739a8c7c708Swdenk 3740c609719bSwdenk- General: 3741c609719bSwdenk 3742c609719bSwdenk In the target system modem support is enabled when a 3743c609719bSwdenk specific key (key combination) is pressed during 3744c609719bSwdenk power-on. Otherwise U-Boot will boot normally 374511ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3746c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3747c609719bSwdenk function, returning 1 and thus enabling modem 3748c609719bSwdenk initialization. 3749c609719bSwdenk 3750c609719bSwdenk If there are no modem init strings in the 3751c609719bSwdenk environment, U-Boot proceed to autoboot; the 3752c609719bSwdenk previous output (banner, info printfs) will be 375311ccc33fSMarcel Ziswiler suppressed, though. 3754c609719bSwdenk 3755c609719bSwdenk See also: doc/README.Modem 3756c609719bSwdenk 37579660e442SHelmut RaigerBoard initialization settings: 37589660e442SHelmut Raiger------------------------------ 37599660e442SHelmut Raiger 37609660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 37619660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 37629660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 37639660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 37649660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 37659660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 37669660e442SHelmut Raiger 37679660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 37689660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 37699660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 37709660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3771c609719bSwdenk 3772c609719bSwdenkConfiguration Settings: 3773c609719bSwdenk----------------------- 3774c609719bSwdenk 37754d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 37764d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 37774d1fd7f1SYork Sun 37786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3779c609719bSwdenk undefine this when you're short of memory. 3780c609719bSwdenk 37812fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 37822fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 37832fb2604dSPeter Tyser 37846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3785c609719bSwdenk prompt for user input. 3786c609719bSwdenk 37876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3788c609719bSwdenk 37896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3790c609719bSwdenk 37916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3792c609719bSwdenk 37936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3794c609719bSwdenk the application (usually a Linux kernel) when it is 3795c609719bSwdenk booted 3796c609719bSwdenk 37976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3798c609719bSwdenk List of legal baudrate settings for this board. 3799c609719bSwdenk 38006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3801c609719bSwdenk Suppress display of console information at boot. 3802c609719bSwdenk 38036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3804c609719bSwdenk If the board specific function 3805c609719bSwdenk extern int overwrite_console (void); 3806c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3807c609719bSwdenk serial port, else the settings in the environment are used. 3808c609719bSwdenk 38096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3810c609719bSwdenk Enable the call to overwrite_console(). 3811c609719bSwdenk 38126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3813c609719bSwdenk Enable overwrite of previous console environment settings. 3814c609719bSwdenk 38156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3816c609719bSwdenk Begin and End addresses of the area used by the 3817c609719bSwdenk simple memory test. 3818c609719bSwdenk 38196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3820c609719bSwdenk Enable an alternate, more extensive memory test. 3821c609719bSwdenk 38226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 38235f535fe1Swdenk Scratch address used by the alternate memory test 38245f535fe1Swdenk You only need to set this if address zero isn't writeable 38255f535fe1Swdenk 38266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 38276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 382814f73ca6SStefan Roese this specified memory area will get subtracted from the top 382911ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 383014f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 383114f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 383214f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 38335e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 383414f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 38355e12e75dSStefan Roese will have to get fixed in Linux additionally. 383614f73ca6SStefan Roese 383714f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 383814f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 383914f73ca6SStefan Roese be touched. 384014f73ca6SStefan Roese 384114f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 384214f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 384314f73ca6SStefan Roese then the end address of the Linux memory will be located at a 384414f73ca6SStefan Roese non page size aligned address and this could cause major 384514f73ca6SStefan Roese problems. 384614f73ca6SStefan Roese 38476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3848c609719bSwdenk Enable temporary baudrate change while serial download 3849c609719bSwdenk 38506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3851c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3852c609719bSwdenk 38536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3854c609719bSwdenk Physical start address of Motherboard I/O (if using a 3855c609719bSwdenk Cogent motherboard) 3856c609719bSwdenk 38576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3858c609719bSwdenk Physical start address of Flash memory. 3859c609719bSwdenk 38606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3861c609719bSwdenk Physical start address of boot monitor code (set by 3862c609719bSwdenk make config files to be same as the text base address 386314d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 38646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3865c609719bSwdenk 38666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 38673b57fe0aSwdenk Size of memory reserved for monitor code, used to 38683b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 38693b57fe0aSwdenk embedded within the U-Boot image, or in a separate 38703b57fe0aSwdenk flash sector. 3871c609719bSwdenk 38726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3873c609719bSwdenk Size of DRAM reserved for malloc() use. 3874c609719bSwdenk 3875d59476b6SSimon Glass- CONFIG_SYS_MALLOC_F_LEN 3876d59476b6SSimon Glass Size of the malloc() pool for use before relocation. If 3877d59476b6SSimon Glass this is defined, then a very simple malloc() implementation 3878d59476b6SSimon Glass will become available before relocation. The address is just 3879d59476b6SSimon Glass below the global data, and the stack is moved down to make 3880d59476b6SSimon Glass space. 3881d59476b6SSimon Glass 3882d59476b6SSimon Glass This feature allocates regions with increasing addresses 3883d59476b6SSimon Glass within the region. calloc() is supported, but realloc() 3884d59476b6SSimon Glass is not available. free() is supported but does nothing. 3885d59476b6SSimon Glass The memory will be freed (or in fact just forgotton) when 3886d59476b6SSimon Glass U-Boot relocates itself. 3887d59476b6SSimon Glass 3888e7b14e9aSSimon Glass Pre-relocation malloc() is only supported on ARM and sandbox 388929afe9e6SSimon Glass at present but is fairly easy to enable for other archs. 389029afe9e6SSimon Glass 38916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 389215940c9aSStefan Roese Normally compressed uImages are limited to an 389315940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 38946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 389515940c9aSStefan Roese to adjust this setting to your needs. 3896c609719bSwdenk 38976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3898c609719bSwdenk Maximum size of memory mapped by the startup code of 3899c609719bSwdenk the Linux kernel; all data that must be processed by 39007d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 39017d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 39021bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 39037d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3904c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3905c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3906c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3907c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3908c609719bSwdenk 3909fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3910fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3911fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3912fca43cc8SJohn Rigby is enabled. 3913fca43cc8SJohn Rigby 3914fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3915fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3916fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3917fca43cc8SJohn Rigby 3918fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3919fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3920fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3921fca43cc8SJohn Rigby 39226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3923c609719bSwdenk Max number of Flash memory banks 3924c609719bSwdenk 39256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3926c609719bSwdenk Max number of sectors on a Flash chip 3927c609719bSwdenk 39286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3929c609719bSwdenk Timeout for Flash erase operations (in ms) 3930c609719bSwdenk 39316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3932c609719bSwdenk Timeout for Flash write operations (in ms) 3933c609719bSwdenk 39346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 39358564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 39368564acf9Swdenk 39376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 39388564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 39398564acf9Swdenk 39406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 39418564acf9Swdenk If defined, hardware flash sectors protection is used 39428564acf9Swdenk instead of U-Boot software protection. 39438564acf9Swdenk 39446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3945c609719bSwdenk 3946c609719bSwdenk Enable TFTP transfers directly to flash memory; 3947c609719bSwdenk without this option such a download has to be 3948c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3949c609719bSwdenk copy from RAM to flash. 3950c609719bSwdenk 3951c609719bSwdenk The two-step approach is usually more reliable, since 3952c609719bSwdenk you can check if the download worked before you erase 395311ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 395411ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3955c609719bSwdenk downloaded image) this option may be very useful. 3956c609719bSwdenk 39576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3958c609719bSwdenk Define if the flash driver uses extra elements in the 39595653fc33Swdenk common flash structure for storing flash geometry. 39605653fc33Swdenk 396100b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 39625653fc33Swdenk This option also enables the building of the cfi_flash driver 39635653fc33Swdenk in the drivers directory 396453cf9435Sstroese 396591809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 396691809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 396791809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 396891809ed5SPiotr Ziecik to the MTD layer. 396991809ed5SPiotr Ziecik 39706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 397196ef831fSGuennadi Liakhovetski Use buffered writes to flash. 397296ef831fSGuennadi Liakhovetski 397396ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 397496ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 397596ef831fSGuennadi Liakhovetski write commands. 397696ef831fSGuennadi Liakhovetski 39776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 39785568e613SStefan Roese If this option is defined, the common CFI flash doesn't 39795568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 39805568e613SStefan Roese is useful, if some of the configured banks are only 39815568e613SStefan Roese optionally available. 39825568e613SStefan Roese 39839a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 39849a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 39859a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 39869a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 39879a042e9cSJerry Van Baren 3988352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3989352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3990352ef3f1SStefan Roese against the source after the write operation. An error message 3991352ef3f1SStefan Roese will be printed when the contents are not identical. 3992352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3993352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3994352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3995352ef3f1SStefan Roese this option if you really know what you are doing. 3996352ef3f1SStefan Roese 39976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 399811ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 399911ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 400053cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 400153cf9435Sstroese buffers can be full shortly after enabling the interface 400211ccc33fSMarcel Ziswiler on high Ethernet traffic. 400353cf9435Sstroese Defaults to 4 if not defined. 4004c609719bSwdenk 4005ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 4006ea882bafSWolfgang Denk 4007ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 4008ea882bafSWolfgang Denk internally to store the environment settings. The default 4009ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 4010ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 4011ea882bafSWolfgang Denk lib/hashtable.c for details. 4012ea882bafSWolfgang Denk 40132598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 40142598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 40151bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 40162598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 40172598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 40182598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 40192598090bSJoe Hershberger 40202598090bSJoe Hershberger The format of the list is: 40212598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 4022267541f7SJoe Hershberger access_atribute = [a|r|o|c] 4023267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 40242598090bSJoe Hershberger entry = variable_name[:attributes] 40252598090bSJoe Hershberger list = entry[,list] 40262598090bSJoe Hershberger 40272598090bSJoe Hershberger The type attributes are: 40282598090bSJoe Hershberger s - String (default) 40292598090bSJoe Hershberger d - Decimal 40302598090bSJoe Hershberger x - Hexadecimal 40312598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 40322598090bSJoe Hershberger i - IP address 40332598090bSJoe Hershberger m - MAC address 40342598090bSJoe Hershberger 4035267541f7SJoe Hershberger The access attributes are: 4036267541f7SJoe Hershberger a - Any (default) 4037267541f7SJoe Hershberger r - Read-only 4038267541f7SJoe Hershberger o - Write-once 4039267541f7SJoe Hershberger c - Change-default 4040267541f7SJoe Hershberger 40412598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 40422598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 40432598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 40442598090bSJoe Hershberger 40452598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 40462598090bSJoe Hershberger Define this to a list (string) to define validation that 40472598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 40482598090bSJoe Hershberger environment variable. To override a setting in the static 40492598090bSJoe Hershberger list, simply add an entry for the same variable name to the 40502598090bSJoe Hershberger ".flags" variable. 40512598090bSJoe Hershberger 4052267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 4053267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 4054267541f7SJoe Hershberger access flags. 4055267541f7SJoe Hershberger 40565c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 40575c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 40585c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 40595c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 40605c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 40615c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 40625c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 40635c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 40645c1a7ea6SSimon Glass your board please report the problem and send patches! 40655c1a7ea6SSimon Glass 40660b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 40670b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 40680b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 40690b1b60c7SLokesh Vutla the value can be calulated on a given board. 4070632efa74SSimon Glass 40710d296cc2SGabe Black- CONFIG_USE_STDINT 40720d296cc2SGabe Black If stdint.h is available with your toolchain you can define this 40730d296cc2SGabe Black option to enable it. You can provide option 'USE_STDINT=1' when 40740d296cc2SGabe Black building U-Boot to enable this. 40750d296cc2SGabe Black 4076c609719bSwdenkThe following definitions that deal with the placement and management 4077c609719bSwdenkof environment data (variable area); in general, we support the 4078c609719bSwdenkfollowing configurations: 4079c609719bSwdenk 4080c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 4081c3eb3fe4SMike Frysinger 4082c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 4083c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 4084c3eb3fe4SMike Frysinger 40855a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 4086c609719bSwdenk 4087c609719bSwdenk Define this if the environment is in flash memory. 4088c609719bSwdenk 4089c609719bSwdenk a) The environment occupies one whole flash sector, which is 4090c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 4091c609719bSwdenk happens usually with "bottom boot sector" or "top boot 4092c609719bSwdenk sector" type flash chips, which have several smaller 4093c609719bSwdenk sectors at the start or the end. For instance, such a 4094c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 4095c609719bSwdenk such a case you would place the environment in one of the 4096c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 4097c609719bSwdenk "top boot sector" type flash chips, you would put the 4098c609719bSwdenk environment in one of the last sectors, leaving a gap 4099c609719bSwdenk between U-Boot and the environment. 4100c609719bSwdenk 41010e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 4102c609719bSwdenk 4103c609719bSwdenk Offset of environment data (variable area) to the 4104c609719bSwdenk beginning of flash memory; for instance, with bottom boot 4105c609719bSwdenk type flash chips the second sector can be used: the offset 4106c609719bSwdenk for this sector is given here. 4107c609719bSwdenk 41086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 4109c609719bSwdenk 41100e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 4111c609719bSwdenk 4112c609719bSwdenk This is just another way to specify the start address of 4113c609719bSwdenk the flash sector containing the environment (instead of 41140e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 4115c609719bSwdenk 41160e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 4117c609719bSwdenk 4118c609719bSwdenk Size of the sector containing the environment. 4119c609719bSwdenk 4120c609719bSwdenk 4121c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 4122c609719bSwdenk In such a case you don't want to spend a whole sector for 4123c609719bSwdenk the environment. 4124c609719bSwdenk 41250e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4126c609719bSwdenk 41275a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 41280e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 4129c609719bSwdenk of this flash sector for the environment. This saves 4130c609719bSwdenk memory for the RAM copy of the environment. 4131c609719bSwdenk 4132c609719bSwdenk It may also save flash memory if you decide to use this 4133c609719bSwdenk when your environment is "embedded" within U-Boot code, 4134c609719bSwdenk since then the remainder of the flash sector could be used 4135c609719bSwdenk for U-Boot code. It should be pointed out that this is 4136c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 4137c609719bSwdenk updating the environment in flash makes it always 4138c609719bSwdenk necessary to erase the WHOLE sector. If something goes 4139c609719bSwdenk wrong before the contents has been restored from a copy in 4140c609719bSwdenk RAM, your target system will be dead. 4141c609719bSwdenk 41420e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 41430e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 4144c609719bSwdenk 4145c609719bSwdenk These settings describe a second storage area used to hold 414611ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 41473e38691eSwdenk a valid backup copy in case there is a power failure during 4148c609719bSwdenk a "saveenv" operation. 4149c609719bSwdenk 4150c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 4151c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 4152c609719bSwdenkaccordingly! 4153c609719bSwdenk 4154c609719bSwdenk 41559314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 4156c609719bSwdenk 4157c609719bSwdenk Define this if you have some non-volatile memory device 4158c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 4159c609719bSwdenk environment. 4160c609719bSwdenk 41610e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 41620e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4163c609719bSwdenk 416411ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 4165c609719bSwdenk want to use for environment. It is assumed that this memory 4166c609719bSwdenk can just be read and written to, without any special 4167c609719bSwdenk provision. 4168c609719bSwdenk 4169c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 4170c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 417111ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 4172c609719bSwdenkU-Boot will hang. 4173c609719bSwdenk 4174c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 4175c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 4176c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 4177c609719bSwdenkto save the current settings. 4178c609719bSwdenk 4179c609719bSwdenk 4180bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 4181c609719bSwdenk 4182c609719bSwdenk Use this if you have an EEPROM or similar serial access 4183c609719bSwdenk device and a driver for it. 4184c609719bSwdenk 41850e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 41860e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4187c609719bSwdenk 4188c609719bSwdenk These two #defines specify the offset and size of the 4189c609719bSwdenk environment area within the total memory of your EEPROM. 4190c609719bSwdenk 41916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 4192c609719bSwdenk If defined, specified the chip address of the EEPROM device. 4193c609719bSwdenk The default address is zero. 4194c609719bSwdenk 41956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 4196c609719bSwdenk If defined, the number of bits used to address bytes in a 4197c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 4198c609719bSwdenk would require six bits. 4199c609719bSwdenk 42006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 4201c609719bSwdenk If defined, the number of milliseconds to delay between 4202c609719bSwdenk page writes. The default is zero milliseconds. 4203c609719bSwdenk 42046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 4205c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 4206c609719bSwdenk that this is NOT the chip address length! 4207c609719bSwdenk 42086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 42095cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 42105cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 42115cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 42125cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 42135cf91d6bSwdenk byte chips. 42145cf91d6bSwdenk 42155cf91d6bSwdenk Note that we consider the length of the address field to 42165cf91d6bSwdenk still be one byte because the extra address bits are hidden 42175cf91d6bSwdenk in the chip address. 42185cf91d6bSwdenk 42196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 4220c609719bSwdenk The size in bytes of the EEPROM device. 4221c609719bSwdenk 4222548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 4223548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 4224548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 4225548738b4SHeiko Schocher 4226548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 4227548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 4228548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 4229548738b4SHeiko Schocher EEPROM. For example: 4230548738b4SHeiko Schocher 4231ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 4232548738b4SHeiko Schocher 4233548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 4234548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 4235c609719bSwdenk 4236057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 42375779d8d9Swdenk 42385779d8d9Swdenk Define this if you have a DataFlash memory device which you 42395779d8d9Swdenk want to use for the environment. 42405779d8d9Swdenk 42410e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 42420e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 42430e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 42445779d8d9Swdenk 42455779d8d9Swdenk These three #defines specify the offset and size of the 42465779d8d9Swdenk environment area within the total memory of your DataFlash placed 42475779d8d9Swdenk at the specified address. 42485779d8d9Swdenk 4249bd83b592SWu, Josh- CONFIG_ENV_IS_IN_SPI_FLASH: 4250bd83b592SWu, Josh 4251bd83b592SWu, Josh Define this if you have a SPI Flash memory device which you 4252bd83b592SWu, Josh want to use for the environment. 4253bd83b592SWu, Josh 4254bd83b592SWu, Josh - CONFIG_ENV_OFFSET: 4255bd83b592SWu, Josh - CONFIG_ENV_SIZE: 4256bd83b592SWu, Josh 4257bd83b592SWu, Josh These two #defines specify the offset and size of the 4258bd83b592SWu, Josh environment area within the SPI Flash. CONFIG_ENV_OFFSET must be 4259bd83b592SWu, Josh aligned to an erase sector boundary. 4260bd83b592SWu, Josh 4261bd83b592SWu, Josh - CONFIG_ENV_SECT_SIZE: 4262bd83b592SWu, Josh 4263bd83b592SWu, Josh Define the SPI flash's sector size. 4264bd83b592SWu, Josh 4265bd83b592SWu, Josh - CONFIG_ENV_OFFSET_REDUND (optional): 4266bd83b592SWu, Josh 4267bd83b592SWu, Josh This setting describes a second storage area of CONFIG_ENV_SIZE 4268bd83b592SWu, Josh size used to hold a redundant copy of the environment data, so 4269bd83b592SWu, Josh that there is a valid backup copy in case there is a power failure 4270bd83b592SWu, Josh during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4271bd83b592SWu, Josh aligned to an erase sector boundary. 4272bd83b592SWu, Josh 4273bd83b592SWu, Josh - CONFIG_ENV_SPI_BUS (optional): 4274bd83b592SWu, Josh - CONFIG_ENV_SPI_CS (optional): 4275bd83b592SWu, Josh 4276bd83b592SWu, Josh Define the SPI bus and chip select. If not defined they will be 0. 4277bd83b592SWu, Josh 4278bd83b592SWu, Josh - CONFIG_ENV_SPI_MAX_HZ (optional): 4279bd83b592SWu, Josh 4280bd83b592SWu, Josh Define the SPI max work clock. If not defined then use 1MHz. 4281bd83b592SWu, Josh 4282bd83b592SWu, Josh - CONFIG_ENV_SPI_MODE (optional): 4283bd83b592SWu, Josh 4284bd83b592SWu, Josh Define the SPI work mode. If not defined then use SPI_MODE_3. 4285bd83b592SWu, Josh 42860a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 42870a85a9e7SLiu Gang 42880a85a9e7SLiu Gang Define this if you have a remote memory space which you 42890a85a9e7SLiu Gang want to use for the local device's environment. 42900a85a9e7SLiu Gang 42910a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 42920a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 42930a85a9e7SLiu Gang 42940a85a9e7SLiu Gang These two #defines specify the address and size of the 42950a85a9e7SLiu Gang environment area within the remote memory space. The 42960a85a9e7SLiu Gang local device can get the environment from remote memory 4297fc54c7faSLiu Gang space by SRIO or PCIE links. 42980a85a9e7SLiu Gang 42990a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 43000a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 4301fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4302fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 43030a85a9e7SLiu Gang 430451bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 430513a5695bSwdenk 430613a5695bSwdenk Define this if you have a NAND device which you want to use 430713a5695bSwdenk for the environment. 430813a5695bSwdenk 43090e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 43100e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 431113a5695bSwdenk 431213a5695bSwdenk These two #defines specify the offset and size of the environment 4313fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4314fdd813deSScott Wood aligned to an erase block boundary. 43155779d8d9Swdenk 4316fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4317e443c944SMarkus Klotzbuecher 43180e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4319fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4320fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4321fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4322fdd813deSScott Wood aligned to an erase block boundary. 4323e443c944SMarkus Klotzbuecher 4324fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4325fdd813deSScott Wood 4326fdd813deSScott Wood Specifies the length of the region in which the environment 4327fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4328fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4329fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4330fdd813deSScott Wood the range to be avoided. 4331fdd813deSScott Wood 4332fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4333fdd813deSScott Wood 4334fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4335fdd813deSScott Wood environment from block zero's out-of-band data. The 4336fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4337fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4338fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4339e443c944SMarkus Klotzbuecher 4340b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4341b74ab737SGuennadi Liakhovetski 4342b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4343b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4344b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4345b74ab737SGuennadi Liakhovetski 43462b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 43472b74433fSJoe Hershberger 43482b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 43492b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 43502b74433fSJoe Hershberger accesses, which is important on NAND. 43512b74433fSJoe Hershberger 43522b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 43532b74433fSJoe Hershberger 43542b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 43552b74433fSJoe Hershberger 43562b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 43572b74433fSJoe Hershberger 43582b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 43592b74433fSJoe Hershberger environment in. 43602b74433fSJoe Hershberger 4361785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4362785881f7SJoe Hershberger 4363785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4364785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4365785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4366785881f7SJoe Hershberger 43672b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 43682b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 43692b74433fSJoe Hershberger 43702b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 43712b74433fSJoe Hershberger when storing the env in UBI. 43722b74433fSJoe Hershberger 4373d1db76f1SWu, Josh- CONFIG_ENV_IS_IN_FAT: 4374d1db76f1SWu, Josh Define this if you want to use the FAT file system for the environment. 4375d1db76f1SWu, Josh 4376d1db76f1SWu, Josh - FAT_ENV_INTERFACE: 4377d1db76f1SWu, Josh 4378d1db76f1SWu, Josh Define this to a string that is the name of the block device. 4379d1db76f1SWu, Josh 4380d1db76f1SWu, Josh - FAT_ENV_DEV_AND_PART: 4381d1db76f1SWu, Josh 4382d1db76f1SWu, Josh Define this to a string to specify the partition of the device. It can 4383d1db76f1SWu, Josh be as following: 4384d1db76f1SWu, Josh 4385d1db76f1SWu, Josh "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1) 4386d1db76f1SWu, Josh - "D:P": device D partition P. Error occurs if device D has no 4387d1db76f1SWu, Josh partition table. 4388d1db76f1SWu, Josh - "D:0": device D. 4389d1db76f1SWu, Josh - "D" or "D:": device D partition 1 if device D has partition 4390d1db76f1SWu, Josh table, or the whole device D if has no partition 4391d1db76f1SWu, Josh table. 4392d1db76f1SWu, Josh - "D:auto": first partition in device D with bootable flag set. 4393d1db76f1SWu, Josh If none, first valid paratition in device D. If no 4394d1db76f1SWu, Josh partition table then means device D. 4395d1db76f1SWu, Josh 4396d1db76f1SWu, Josh - FAT_ENV_FILE: 4397d1db76f1SWu, Josh 4398d1db76f1SWu, Josh It's a string of the FAT file name. This file use to store the 4399d1db76f1SWu, Josh envrionment. 4400d1db76f1SWu, Josh 4401d1db76f1SWu, Josh - CONFIG_FAT_WRITE: 4402d1db76f1SWu, Josh This should be defined. Otherwise it cannot save the envrionment file. 4403d1db76f1SWu, Josh 440406e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 440506e4ae5fSStephen Warren 440606e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 440706e4ae5fSStephen Warren environment. 440806e4ae5fSStephen Warren 440906e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 441006e4ae5fSStephen Warren 441106e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 441206e4ae5fSStephen Warren 441306e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 441406e4ae5fSStephen Warren 441506e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 441606e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 441706e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 441806e4ae5fSStephen Warren 441906e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 442006e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 442106e4ae5fSStephen Warren 442206e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 442306e4ae5fSStephen Warren area within the specified MMC device. 442406e4ae5fSStephen Warren 44255c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 44265c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 44275c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 44285c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 44295c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 44305c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 44315c088ee8SStephen Warren maximum possible space before it, to store other data. 44325c088ee8SStephen Warren 443306e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 443406e4ae5fSStephen Warren MMC sector boundary. 443506e4ae5fSStephen Warren 443606e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 443706e4ae5fSStephen Warren 443806e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 443906e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 444006e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 444106e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 444206e4ae5fSStephen Warren 44435c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 44445c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 44455c088ee8SStephen Warren 444606e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 444706e4ae5fSStephen Warren an MMC sector boundary. 444806e4ae5fSStephen Warren 444906e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 445006e4ae5fSStephen Warren 445106e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 445206e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 445306e4ae5fSStephen Warren CONFIG_ENV_SIZE. 445406e4ae5fSStephen Warren 44556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4456c609719bSwdenk 4457c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4458c609719bSwdenk area is used at an early stage (ROM part) if the environment 4459c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4460c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4461c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4462c609719bSwdenk to be a good choice since it makes it far enough from the 4463c609719bSwdenk start of the data area as well as from the stack pointer. 4464c609719bSwdenk 4465e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4466c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4467cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4468c609719bSwdenkuntil then to read environment variables. 4469c609719bSwdenk 447085ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 447185ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 447285ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 447385ec0bccSwdenknecessary, because the first environment variable we need is the 447485ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 447585ec0bccSwdenkhave any device yet where we could complain.] 4476c609719bSwdenk 4477c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4478c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 447985ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4480c609719bSwdenk 44816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4482fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4483fc3e2165Swdenk 44846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4485fc3e2165Swdenk also needs to be defined. 4486fc3e2165Swdenk 44876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4488fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4489c609719bSwdenk 4490f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4491f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4492f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4493f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4494f5675aa5SRon Madrid space for already greatly restricted images, including but not 4495f5675aa5SRon Madrid limited to NAND_SPL configurations. 4496f5675aa5SRon Madrid 4497b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4498b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4499b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4500b2b92f53SSimon Glass to do this. 4501b2b92f53SSimon Glass 4502e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4503e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4504e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4505e2e3e2b1SSimon Glass present. 4506e2e3e2b1SSimon Glass 4507feb85801SSascha Silbe- CONFIG_BOARD_SIZE_LIMIT: 4508feb85801SSascha Silbe Maximum size of the U-Boot image. When defined, the 4509feb85801SSascha Silbe build system checks that the actual size does not 4510feb85801SSascha Silbe exceed it. 4511feb85801SSascha Silbe 4512c609719bSwdenkLow Level (hardware related) configuration options: 4513dc7c9a1aSwdenk--------------------------------------------------- 4514c609719bSwdenk 45156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4516c609719bSwdenk Cache Line Size of the CPU. 4517c609719bSwdenk 45186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4519c609719bSwdenk Default address of the IMMR after system reset. 45202535d602Swdenk 45212535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 45222535d602Swdenk and RPXsuper) to be able to adjust the position of 45232535d602Swdenk the IMMR register after a reset. 4524c609719bSwdenk 4525e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4526e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4527e46fedfeSTimur Tabi PowerPC SOCs. 4528e46fedfeSTimur Tabi 4529e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4530e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4531e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4532e46fedfeSTimur Tabi 4533e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4534e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4535e46fedfeSTimur Tabi 4536e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4537e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4538e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4539e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4540e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4541e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4542e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4543e46fedfeSTimur Tabi 4544e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4545e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4546e46fedfeSTimur Tabi 4547e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4548e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4549e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4550e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4551e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4552e46fedfeSTimur Tabi 4553e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4554e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4555e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4556e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4557e46fedfeSTimur Tabi 4558e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4559e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4560e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4561e46fedfeSTimur Tabi 45627f6c2cbcSwdenk- Floppy Disk Support: 45636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 45647f6c2cbcSwdenk 45657f6c2cbcSwdenk the default drive number (default value 0) 45667f6c2cbcSwdenk 45676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 45687f6c2cbcSwdenk 456911ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 45707f6c2cbcSwdenk (default value 1) 45717f6c2cbcSwdenk 45726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 45737f6c2cbcSwdenk 45747f6c2cbcSwdenk defines the offset of register from address. It 45757f6c2cbcSwdenk depends on which part of the data bus is connected to 457611ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 45777f6c2cbcSwdenk 45786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 45796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 45807f6c2cbcSwdenk default value. 45817f6c2cbcSwdenk 45826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 45837f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 45847f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 45857f6c2cbcSwdenk source code. It is used to make hardware dependant 45867f6c2cbcSwdenk initializations. 45877f6c2cbcSwdenk 45880abddf82SMacpaul Lin- CONFIG_IDE_AHB: 45890abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 45900abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 45910abddf82SMacpaul Lin When software is doing ATA command and data transfer to 45920abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 45930abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 45940abddf82SMacpaul Lin is requierd. 45950abddf82SMacpaul Lin 45966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 459725d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 459825d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4599c609719bSwdenk 46006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4601c609719bSwdenk 46027152b1d0Swdenk Start address of memory area that can be used for 4603c609719bSwdenk initial data and stack; please note that this must be 4604c609719bSwdenk writable memory that is working WITHOUT special 4605c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4606c609719bSwdenk will become available only after programming the 4607c609719bSwdenk memory controller and running certain initialization 4608c609719bSwdenk sequences. 4609c609719bSwdenk 4610c609719bSwdenk U-Boot uses the following memory types: 4611c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4612c609719bSwdenk - MPC824X: data cache 4613c609719bSwdenk - PPC4xx: data cache 4614c609719bSwdenk 46156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4616c609719bSwdenk 4617c609719bSwdenk Offset of the initial data structure in the memory 46186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 46196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4620c609719bSwdenk data is located at the end of the available space 4621553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 46226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 46236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 46246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4625c609719bSwdenk 4626c609719bSwdenk Note: 4627c609719bSwdenk On the MPC824X (or other systems that use the data 4628c609719bSwdenk cache for initial memory) the address chosen for 46296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4630c609719bSwdenk point to an otherwise UNUSED address space between 4631c609719bSwdenk the top of RAM and the start of the PCI space. 4632c609719bSwdenk 46336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4634c609719bSwdenk 46356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4636c609719bSwdenk 46376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4638c609719bSwdenk 46396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4640c609719bSwdenk 46416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4642c609719bSwdenk 46436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4644c609719bSwdenk 46456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4646c609719bSwdenk SDRAM timing 4647c609719bSwdenk 46486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4649c609719bSwdenk periodic timer for refresh 4650c609719bSwdenk 46516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4652c609719bSwdenk 46536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 46546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 46556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 46566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4657c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4658c609719bSwdenk 4659c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 46606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 46616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4662c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4663c609719bSwdenk 46646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 46656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4666c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4667c609719bSwdenk Prescaler definitions (SDRAM timing) 4668c609719bSwdenk 46696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4670c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4671c609719bSwdenk define relocation offset in DPRAM [DSP2] 4672c609719bSwdenk 46736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4674b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4675b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4676b423d055SHeiko Schocher 46776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4678c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4679c609719bSwdenk define relocation offset in DPRAM [SCC4] 4680c609719bSwdenk 46816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4682c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4683c609719bSwdenk wrong setting might damage your board. Read 4684c609719bSwdenk doc/README.MBX before setting this variable! 4685c609719bSwdenk 46866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4687ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4688ea909b76Swdenk (Power On Self Tests). This definition overrides 4689ea909b76Swdenk #define'd default value in commproc.h resp. 4690ea909b76Swdenk cpm_8260.h. 4691ea909b76Swdenk 46926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 46936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 46946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 46956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 46966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 46976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 46986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 46996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4700a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 47015d232d0eSwdenk 47029cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 47039cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 47049cacf4fcSDirk Eibach required. 47059cacf4fcSDirk Eibach 470669fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 470769fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 470869fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 470969fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 471069fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 471169fd2d3bSAndrew Sharp by coreboot or similar. 471269fd2d3bSAndrew Sharp 4713842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4714842033e6SGabor Juhos Enable support for indirect PCI bridges. 4715842033e6SGabor Juhos 4716a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4717a09b9b68SKumar Gala Chip has SRIO or not 4718a09b9b68SKumar Gala 4719a09b9b68SKumar Gala- CONFIG_SRIO1: 4720a09b9b68SKumar Gala Board has SRIO 1 port available 4721a09b9b68SKumar Gala 4722a09b9b68SKumar Gala- CONFIG_SRIO2: 4723a09b9b68SKumar Gala Board has SRIO 2 port available 4724a09b9b68SKumar Gala 4725c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4726c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4727c8b28152SLiu Gang 4728a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4729a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4730a09b9b68SKumar Gala 4731a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4732a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4733a09b9b68SKumar Gala 4734a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4735a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4736a09b9b68SKumar Gala 473766bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 473866bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 473966bd1846SFabio Estevam a 16 bit bus. 474066bd1846SFabio Estevam Not all NAND drivers use this symbol. 4741a430e916SFabio Estevam Example of drivers that use it: 474266bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4743a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4744eced4626SAlex Waterman 4745eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4746eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4747eced4626SAlex Waterman a default value will be used. 4748eced4626SAlex Waterman 4749bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4750218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4751218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4752218ca724SWolfgang Denk 4753bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4754bb99ad6dSBen Warren I2C address of the SPD EEPROM 4755bb99ad6dSBen Warren 47566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4757218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4758218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4759218ca724SWolfgang Denk to something your driver can deal with. 4760bb99ad6dSBen Warren 47611b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 47621b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 47631b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 47641b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 47651b3e3c4fSYork Sun header files or board specific files. 47661b3e3c4fSYork Sun 47676f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 47686f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 47696f5e1dc5SYork Sun 47706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4771218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4772218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 47732ad6b513STimur Tabi 4774c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4775c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4776c26e454dSwdenk 4777c26e454dSwdenk- CONFIG_FEC[12]_PHY 4778c26e454dSwdenk Define to the hardcoded PHY address which corresponds 47796e592385Swdenk to the given FEC; i. e. 4780c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4781c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4782c26e454dSwdenk 4783c26e454dSwdenk When set to -1, means to probe for first available. 4784c26e454dSwdenk 4785c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4786c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4787c26e454dSwdenk (so program the FEC to ignore it). 4788c26e454dSwdenk 4789c26e454dSwdenk- CONFIG_RMII 4790c26e454dSwdenk Enable RMII mode for all FECs. 4791c26e454dSwdenk Note that this is a global option, we can't 4792c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4793c26e454dSwdenk 47945cf91d6bSwdenk- CONFIG_CRC32_VERIFY 47955cf91d6bSwdenk Add a verify option to the crc32 command. 47965cf91d6bSwdenk The syntax is: 47975cf91d6bSwdenk 47985cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 47995cf91d6bSwdenk 48005cf91d6bSwdenk Where address/count indicate a memory area 48015cf91d6bSwdenk and crc32 is the correct crc32 which the 48025cf91d6bSwdenk area should have. 48035cf91d6bSwdenk 480456523f12Swdenk- CONFIG_LOOPW 480556523f12Swdenk Add the "loopw" memory command. This only takes effect if 4806602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 480756523f12Swdenk 48087b466641Sstroese- CONFIG_MX_CYCLIC 48097b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 48107b466641Sstroese "md/mw" commands. 48117b466641Sstroese Examples: 48127b466641Sstroese 48137b466641Sstroese => mdc.b 10 4 500 48147b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 48157b466641Sstroese 48167b466641Sstroese => mwc.l 100 12345678 10 48177b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 48187b466641Sstroese 48197b466641Sstroese This only takes effect if the memory commands are activated 4820602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 48217b466641Sstroese 48228aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4823afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4824e03f3169SWolfgang Denk low level initializations (like setting up the memory 4825e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4826e03f3169SWolfgang Denk relocate itself into RAM. 48278aa1a2d1Swdenk 4828e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4829e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4830e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4831e03f3169SWolfgang Denk these initializations itself. 48328aa1a2d1Swdenk 4833401bb30bSAneesh V- CONFIG_SPL_BUILD 4834df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4835df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4836df81238bSMagnus Lilja compiling a NAND SPL. 4837400558b5Swdenk 48383aa29de0SYing Zhang- CONFIG_TPL_BUILD 48393aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 48403aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 48413aa29de0SYing Zhang It is loaded by the SPL. 48423aa29de0SYing Zhang 48435df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 48445df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 48455df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 48465df572f0SYing Zhang previous 4k of the .text section. 48475df572f0SYing Zhang 48484213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 48494213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 48504213fc29SSimon Glass effective address. It is therefore not necessary to regard 48514213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 48524213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 48534213fc29SSimon Glass it maintains its own little RAM buffer which contains all 48544213fc29SSimon Glass addressable memory. This option causes some memory accesses 48554213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 48564213fc29SSimon Glass 4857d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4858d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4859d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4860d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4861d8834a13SMatthias Weisser conditions but may increase the binary size. 4862d8834a13SMatthias Weisser 4863588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4864588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4865588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4866b16f521aSGabe Black 4867fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4868fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4869fc33705eSMark Jackson 4870fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 48715b5ece9eSGabe Black 487216678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 487316678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 487416678eb4SHeiko Schocher 4875999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 4876999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 4877999d7d32SKaricheri, Muralidharan driver that uses this: 4878999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 4879999d7d32SKaricheri, Muralidharan 4880f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4881f2717b47STimur Tabi----------------------------------- 4882f2717b47STimur Tabi 4883f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4884f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4885f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4886f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4887f2717b47STimur Tabiwithin that device. 4888f2717b47STimur Tabi 4889dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4890dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4891dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4892dcf1d774SZhao Qiang is also specified. 4893dcf1d774SZhao Qiang 4894dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4895dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4896f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4897f2717b47STimur Tabi is also specified. 4898f2717b47STimur Tabi 4899f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4900f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4901f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4902f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4903f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4904f2717b47STimur Tabi 4905f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4906f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4907f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4908f2717b47STimur Tabi virtual address in NOR flash. 4909f2717b47STimur Tabi 4910f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4911f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4912f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4913f2717b47STimur Tabi 4914f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4915f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4916f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4917f2717b47STimur Tabi 4918f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4919f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4920f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4921f2717b47STimur Tabi 4922292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4923292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4924292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4925fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4926fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4927fc54c7faSLiu Gang master's memory space. 4928f2717b47STimur Tabi 4929b940ca64SJ. German RiveraFreescale Layerscape Management Complex Firmware Support: 4930b940ca64SJ. German Rivera--------------------------------------------------------- 4931b940ca64SJ. German RiveraThe Freescale Layerscape Management Complex (MC) supports the loading of 4932b940ca64SJ. German Rivera"firmware". 4933b940ca64SJ. German RiveraThis firmware often needs to be loaded during U-Boot booting, so macros 4934b940ca64SJ. German Riveraare used to identify the storage device (NOR flash, SPI, etc) and the address 4935b940ca64SJ. German Riverawithin that device. 4936b940ca64SJ. German Rivera 4937b940ca64SJ. German Rivera- CONFIG_FSL_MC_ENET 4938b940ca64SJ. German Rivera Enable the MC driver for Layerscape SoCs. 4939b940ca64SJ. German Rivera 4940b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_ADDR 4941b940ca64SJ. German Rivera The address in the storage device where the firmware is located. The 4942b940ca64SJ. German Rivera meaning of this address depends on which CONFIG_SYS_LS_MC_FW_IN_xxx macro 4943b940ca64SJ. German Rivera is also specified. 4944b940ca64SJ. German Rivera 4945b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_LENGTH 4946b940ca64SJ. German Rivera The maximum possible size of the firmware. The firmware binary format 4947b940ca64SJ. German Rivera has a field that specifies the actual size of the firmware, but it 4948b940ca64SJ. German Rivera might not be possible to read any part of the firmware unless some 4949b940ca64SJ. German Rivera local storage is allocated to hold the entire firmware first. 4950b940ca64SJ. German Rivera 4951b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_IN_NOR 4952b940ca64SJ. German Rivera Specifies that MC firmware is located in NOR flash, mapped as 4953b940ca64SJ. German Rivera normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the 4954b940ca64SJ. German Rivera virtual address in NOR flash. 4955b940ca64SJ. German Rivera 4956c609719bSwdenkBuilding the Software: 4957c609719bSwdenk====================== 4958c609719bSwdenk 4959218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4960218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4961218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4962218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4963218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4964218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4965c609719bSwdenk 4966218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4967218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4968218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4969218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4970218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4971c609719bSwdenk 4972218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4973218ca724SWolfgang Denk $ export CROSS_COMPILE 4974c609719bSwdenk 49752f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 49762f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 49772f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 49782f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 49792f8d396bSPeter Tyser 49802f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 49812f8d396bSPeter Tyser 49822f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 49832f8d396bSPeter Tyser be executed on computers running Windows. 49842f8d396bSPeter Tyser 4985c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4986c609719bSwdenksources you must configure U-Boot for one specific board type. This 4987c609719bSwdenkis done by typing: 4988c609719bSwdenk 4989ab584d67SHolger Freyther make NAME_defconfig 4990c609719bSwdenk 4991ab584d67SHolger Freytherwhere "NAME_defconfig" is the name of one of the existing configu- 49924d675ae6SMichael Jonesrations; see boards.cfg for supported names. 499354387ac9Swdenk 4994c609719bSwdenkNote: for some board special configuration names may exist; check if 4995c609719bSwdenk additional information is available from the board vendor; for 49962729af9dSwdenk instance, the TQM823L systems are available without (standard) 49972729af9dSwdenk or with LCD support. You can select such additional "features" 499811ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4999c609719bSwdenk 5000ab584d67SHolger Freyther make TQM823L_defconfig 50012729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 5002c609719bSwdenk 5003ab584d67SHolger Freyther make TQM823L_LCD_defconfig 5004c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 5005c609719bSwdenk 5006c609719bSwdenk etc. 5007c609719bSwdenk 5008c609719bSwdenk 5009c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 50107152b1d0Swdenkimages ready for download to / installation on your system: 5011c609719bSwdenk 5012c609719bSwdenk- "u-boot.bin" is a raw binary image 5013c609719bSwdenk- "u-boot" is an image in ELF binary format 5014c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 5015c609719bSwdenk 5016baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 5017baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 5018baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 5019baf31249SMarian Balakowicz 5020baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 5021baf31249SMarian Balakowicz 5022baf31249SMarian Balakowicz make O=/tmp/build distclean 5023ab584d67SHolger Freyther make O=/tmp/build NAME_defconfig 5024baf31249SMarian Balakowicz make O=/tmp/build all 5025baf31249SMarian Balakowicz 5026adbba996STimo Ketola2. Set environment variable KBUILD_OUTPUT to point to the desired location: 5027baf31249SMarian Balakowicz 5028adbba996STimo Ketola export KBUILD_OUTPUT=/tmp/build 5029baf31249SMarian Balakowicz make distclean 5030ab584d67SHolger Freyther make NAME_defconfig 5031baf31249SMarian Balakowicz make all 5032baf31249SMarian Balakowicz 5033adbba996STimo KetolaNote that the command line "O=" setting overrides the KBUILD_OUTPUT environment 5034baf31249SMarian Balakowiczvariable. 5035baf31249SMarian Balakowicz 5036c609719bSwdenk 5037c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 5038c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 5039c609719bSwdenknative "make". 5040c609719bSwdenk 5041c609719bSwdenk 5042c609719bSwdenkIf the system board that you have is not listed, then you will need 5043c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 5044c609719bSwdenksteps: 5045c609719bSwdenk 5046c609719bSwdenk1. Add a new configuration option for your board to the toplevel 50474d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 50484d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 5049c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 505085ec0bccSwdenk files you need. In your board directory, you will need at least 505185ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 505285ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 505385ec0bccSwdenk your board 5054c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 5055c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 5056ab584d67SHolger Freyther4. Run "make <board>_defconfig" with your new name. 5057c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 5058c609719bSwdenk to be installed on your target system. 505985ec0bccSwdenk6. Debug and solve any problems that might arise. 5060c609719bSwdenk [Of course, this last step is much harder than it sounds.] 5061c609719bSwdenk 5062c609719bSwdenk 5063c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 5064c609719bSwdenk============================================================== 5065c609719bSwdenk 5066c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 5067c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 5068c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 5069c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 5070218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 5071c609719bSwdenk 5072c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 5073c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 5074c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 5075c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 5076c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 50777152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 5078218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 5079218ca724SWolfgang Denkyou can type 5080c609719bSwdenk 5081c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 5082c609719bSwdenk 5083c609719bSwdenkor to build on a native PowerPC system you can type 5084c609719bSwdenk 5085c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 5086c609719bSwdenk 5087218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 5088218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 5089218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 5090218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 5091218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 5092218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 5093218ca724SWolfgang Denkvariable. For example: 5094baf31249SMarian Balakowicz 5095baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 5096baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 5097baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 5098baf31249SMarian Balakowicz 5099218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 5100218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 5101218ca724SWolfgang Denkduring the whole build process. 5102baf31249SMarian Balakowicz 5103baf31249SMarian Balakowicz 5104c609719bSwdenkSee also "U-Boot Porting Guide" below. 5105c609719bSwdenk 5106c609719bSwdenk 5107c609719bSwdenkMonitor Commands - Overview: 5108c609719bSwdenk============================ 5109c609719bSwdenk 5110c609719bSwdenkgo - start application at address 'addr' 5111c609719bSwdenkrun - run commands in an environment variable 5112c609719bSwdenkbootm - boot application image from memory 5113c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 511444f074c7SMarek Vasutbootz - boot zImage from memory 5115c609719bSwdenktftpboot- boot image via network using TFTP protocol 5116c609719bSwdenk and env variables "ipaddr" and "serverip" 5117c609719bSwdenk (and eventually "gatewayip") 51181fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 5119c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 5120c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 5121c609719bSwdenkloads - load S-Record file over serial line 5122c609719bSwdenkloadb - load binary file over serial line (kermit mode) 5123c609719bSwdenkmd - memory display 5124c609719bSwdenkmm - memory modify (auto-incrementing) 5125c609719bSwdenknm - memory modify (constant address) 5126c609719bSwdenkmw - memory write (fill) 5127c609719bSwdenkcp - memory copy 5128c609719bSwdenkcmp - memory compare 5129c609719bSwdenkcrc32 - checksum calculation 51300f89c54bSPeter Tyseri2c - I2C sub-system 5131c609719bSwdenksspi - SPI utility commands 5132c609719bSwdenkbase - print or set address offset 5133c609719bSwdenkprintenv- print environment variables 5134c609719bSwdenksetenv - set environment variables 5135c609719bSwdenksaveenv - save environment variables to persistent storage 5136c609719bSwdenkprotect - enable or disable FLASH write protection 5137c609719bSwdenkerase - erase FLASH memory 5138c609719bSwdenkflinfo - print FLASH memory information 513910635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 5140c609719bSwdenkbdinfo - print Board Info structure 5141c609719bSwdenkiminfo - print header information for application image 5142c609719bSwdenkconinfo - print console devices and informations 5143c609719bSwdenkide - IDE sub-system 5144c609719bSwdenkloop - infinite loop on address range 514556523f12Swdenkloopw - infinite write loop on address range 5146c609719bSwdenkmtest - simple RAM test 5147c609719bSwdenkicache - enable or disable instruction cache 5148c609719bSwdenkdcache - enable or disable data cache 5149c609719bSwdenkreset - Perform RESET of the CPU 5150c609719bSwdenkecho - echo args to console 5151c609719bSwdenkversion - print monitor version 5152c609719bSwdenkhelp - print online help 5153c609719bSwdenk? - alias for 'help' 5154c609719bSwdenk 5155c609719bSwdenk 5156c609719bSwdenkMonitor Commands - Detailed Description: 5157c609719bSwdenk======================================== 5158c609719bSwdenk 5159c609719bSwdenkTODO. 5160c609719bSwdenk 5161c609719bSwdenkFor now: just type "help <command>". 5162c609719bSwdenk 5163c609719bSwdenk 5164c609719bSwdenkEnvironment Variables: 5165c609719bSwdenk====================== 5166c609719bSwdenk 5167c609719bSwdenkU-Boot supports user configuration using Environment Variables which 5168c609719bSwdenkcan be made persistent by saving to Flash memory. 5169c609719bSwdenk 5170c609719bSwdenkEnvironment Variables are set using "setenv", printed using 5171c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 5172c609719bSwdenkwithout a value can be used to delete a variable from the 5173c609719bSwdenkenvironment. As long as you don't save the environment you are 5174c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 5175c609719bSwdenkenvironment is erased by accident, a default environment is provided. 5176c609719bSwdenk 5177c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 5178c96f86eeSWolfgang Denk 5179c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 5180c609719bSwdenk 5181c609719bSwdenk baudrate - see CONFIG_BAUDRATE 5182c609719bSwdenk 5183c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 5184c609719bSwdenk 5185c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 5186c609719bSwdenk 5187c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 5188c609719bSwdenk 5189c609719bSwdenk bootfile - Name of the image to load with TFTP 5190c609719bSwdenk 51917d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 51927d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51937d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 51947d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 51957d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 51967d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 5197c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 5198c3624e6eSGrant Likely bootm_mapsize. 5199c3624e6eSGrant Likely 5200c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 5201c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 5202c3624e6eSGrant Likely defines the size of the memory region starting at base 5203c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 5204c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 5205c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 5206c3624e6eSGrant Likely used otherwise. 52077d721e34SBartlomiej Sieka 52087d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 52097d721e34SBartlomiej Sieka command can be restricted. This variable is given as 52107d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 52117d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 52127d721e34SBartlomiej Sieka environment variable. 52137d721e34SBartlomiej Sieka 52144bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 52154bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 52164bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 52174bae9090SBartlomiej Sieka 5218c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 5219c609719bSwdenk "bootp" will just load perform a lookup of the 5220c609719bSwdenk configuration from the BOOTP server, but not try to 5221c609719bSwdenk load any image using TFTP 5222c609719bSwdenk 5223c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 5224c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 5225c609719bSwdenk be automatically started (by internally calling 5226c609719bSwdenk "bootm") 5227c609719bSwdenk 52284a6fd34bSwdenk If set to "no", a standalone image passed to the 52294a6fd34bSwdenk "bootm" command will be copied to the load address 52304a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 52314a6fd34bSwdenk This can be used to load and uncompress arbitrary 52324a6fd34bSwdenk data. 52334a6fd34bSwdenk 5234a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 5235a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 5236fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 5237fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 5238fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 5239fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 5240fa34f6b2SShawn Guo device tree blob be copied to the maximum address 5241fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 5242fa34f6b2SShawn Guo access it during the boot procedure. 5243fa34f6b2SShawn Guo 5244a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 5245a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 5246a28afca5SDavid A. Long to work it must reside in writable memory, have 5247a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 5248a28afca5SDavid A. Long add the information it needs into it, and the memory 5249a28afca5SDavid A. Long must be accessible by the kernel. 5250a28afca5SDavid A. Long 5251eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 5252eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 5253eea63e05SSimon Glass defined. 5254eea63e05SSimon Glass 525517ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 525617ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 525717ea1177Swdenk mode (400kHZ). This environment variable is used in 525817ea1177Swdenk initialization code. So, for changes to be effective 525917ea1177Swdenk it must be saved and board must be reset. 526017ea1177Swdenk 5261c609719bSwdenk initrd_high - restrict positioning of initrd images: 5262c609719bSwdenk If this variable is not set, initrd images will be 5263c609719bSwdenk copied to the highest possible address in RAM; this 5264c609719bSwdenk is usually what you want since it allows for 5265c609719bSwdenk maximum initrd size. If for some reason you want to 5266c609719bSwdenk make sure that the initrd image is loaded below the 52676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 5268c609719bSwdenk variable to a value of "no" or "off" or "0". 5269c609719bSwdenk Alternatively, you can set it to a maximum upper 5270c609719bSwdenk address to use (U-Boot will still check that it 5271c609719bSwdenk does not overwrite the U-Boot stack and data). 5272c609719bSwdenk 5273c609719bSwdenk For instance, when you have a system with 16 MB 52747152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 5275c609719bSwdenk you can do this by adding "mem=12M" to the value of 5276c609719bSwdenk the "bootargs" variable. However, now you must make 52777152b1d0Swdenk sure that the initrd image is placed in the first 5278c609719bSwdenk 12 MB as well - this can be done with 5279c609719bSwdenk 5280c609719bSwdenk setenv initrd_high 00c00000 5281c609719bSwdenk 528238b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 528338b99261Swdenk indication to U-Boot that all addresses are legal 528438b99261Swdenk for the Linux kernel, including addresses in flash 528538b99261Swdenk memory. In this case U-Boot will NOT COPY the 528638b99261Swdenk ramdisk at all. This may be useful to reduce the 528738b99261Swdenk boot time on your system, but requires that this 528838b99261Swdenk feature is supported by your Linux kernel. 528938b99261Swdenk 5290c609719bSwdenk ipaddr - IP address; needed for tftpboot command 5291c609719bSwdenk 5292c609719bSwdenk loadaddr - Default load address for commands like "bootp", 5293dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 5294c609719bSwdenk 5295c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 5296c609719bSwdenk 5297c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 5298c609719bSwdenk 5299c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 5300c609719bSwdenk 5301c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 5302c609719bSwdenk 5303c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 5304c609719bSwdenk 5305e2a53458SMike Frysinger ethprime - controls which interface is used first. 5306a3d991bdSwdenk 5307e2a53458SMike Frysinger ethact - controls which interface is currently active. 5308e2a53458SMike Frysinger For example you can do the following 5309a3d991bdSwdenk 531048690d80SHeiko Schocher => setenv ethact FEC 531148690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 531248690d80SHeiko Schocher => setenv ethact SCC 531348690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 5314a3d991bdSwdenk 5315e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 5316e1692577SMatthias Fuchs available network interfaces. 5317e1692577SMatthias Fuchs It just stays at the currently selected interface. 5318e1692577SMatthias Fuchs 5319a3d991bdSwdenk netretry - When set to "no" each network operation will 5320a3d991bdSwdenk either succeed or fail without retrying. 53216e592385Swdenk When set to "once" the network operation will 53226e592385Swdenk fail when all the available network interfaces 53236e592385Swdenk are tried once without success. 5324a3d991bdSwdenk Useful on scripts which control the retry operation 5325a3d991bdSwdenk themselves. 5326a3d991bdSwdenk 5327b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 5328a1cf027aSJean-Christophe PLAGNIOL-VILLARD 53298d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 53308d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 53318d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 53328d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 53338d51aacdSSimon Glass is silent. 53348d51aacdSSimon Glass 533528cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 5336ecb0ccd9SWolfgang Denk UDP source port. 5337ecb0ccd9SWolfgang Denk 533828cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 533928cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 534028cb9375SWolfgang Denk 5341c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 5342c96f86eeSWolfgang Denk we use the TFTP server's default block size 5343c96f86eeSWolfgang Denk 5344c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 5345c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 5346c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 5347c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 5348c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 5349c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 5350c96f86eeSWolfgang Denk with unreliable TFTP servers. 5351c96f86eeSWolfgang Denk 5352a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 535311ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 5354a3d991bdSwdenk VLAN tagged frames. 5355c609719bSwdenk 5356dc0b7b0eSJason HobbsThe following image location variables contain the location of images 5357dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 5358dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 5359dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 5360dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 5361dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 5362dc0b7b0eSJason Hobbsflash or offset in NAND flash. 5363dc0b7b0eSJason Hobbs 5364dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 5365dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 5366dc0b7b0eSJason Hobbsboards use these variables for other purposes. 5367dc0b7b0eSJason Hobbs 5368dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 5369dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5370dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5371dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5372dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5373dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5374dc0b7b0eSJason Hobbs 5375c609719bSwdenkThe following environment variables may be used and automatically 5376c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5377c609719bSwdenkdepending the information provided by your boot server: 5378c609719bSwdenk 5379c609719bSwdenk bootfile - see above 5380c609719bSwdenk dnsip - IP address of your Domain Name Server 5381fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5382c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5383c609719bSwdenk hostname - Target hostname 5384c609719bSwdenk ipaddr - see above 5385c609719bSwdenk netmask - Subnet Mask 5386c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5387c609719bSwdenk serverip - see above 5388c609719bSwdenk 5389c609719bSwdenk 5390c609719bSwdenkThere are two special Environment Variables: 5391c609719bSwdenk 5392c609719bSwdenk serial# - contains hardware identification information such 5393c609719bSwdenk as type string and/or serial number 5394c609719bSwdenk ethaddr - Ethernet address 5395c609719bSwdenk 5396c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5397c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5398c609719bSwdenkonce they have been set once. 5399c609719bSwdenk 5400c609719bSwdenk 5401c1551ea8SstroeseFurther special Environment Variables: 5402c1551ea8Sstroese 5403c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5404c1551ea8Sstroese with the "version" command. This variable is 5405c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5406c1551ea8Sstroese 5407c1551ea8Sstroese 5408c609719bSwdenkPlease note that changes to some configuration parameters may take 5409c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5410c609719bSwdenk 5411c609719bSwdenk 5412170ab110SJoe HershbergerCallback functions for environment variables: 5413170ab110SJoe Hershberger--------------------------------------------- 5414170ab110SJoe Hershberger 5415170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5416170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5417170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5418170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5419170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5420170ab110SJoe Hershberger 5421170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5422170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5423170ab110SJoe Hershberger 5424170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5425170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5426170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5427170ab110SJoe Hershbergerassociations. The list must be in the following format: 5428170ab110SJoe Hershberger 5429170ab110SJoe Hershberger entry = variable_name[:callback_name] 5430170ab110SJoe Hershberger list = entry[,list] 5431170ab110SJoe Hershberger 5432170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5433170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5434170ab110SJoe Hershberger 5435170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5436170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5437170ab110SJoe Hershbergeroverride any association in the static list. You can define 5438170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5439170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5440170ab110SJoe Hershberger 5441170ab110SJoe Hershberger 5442f07771ccSwdenkCommand Line Parsing: 5443f07771ccSwdenk===================== 5444f07771ccSwdenk 5445f07771ccSwdenkThere are two different command line parsers available with U-Boot: 54467152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5447f07771ccSwdenk 5448f07771ccSwdenkOld, simple command line parser: 5449f07771ccSwdenk-------------------------------- 5450f07771ccSwdenk 5451f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5452f07771ccSwdenk- several commands on one line, separated by ';' 5453fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5454f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5455f07771ccSwdenk for example: 5456fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5457f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5458f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5459f07771ccSwdenk 5460f07771ccSwdenkHush shell: 5461f07771ccSwdenk----------- 5462f07771ccSwdenk 5463f07771ccSwdenk- similar to Bourne shell, with control structures like 5464f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5465f07771ccSwdenk until...do...done, ... 5466f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5467f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5468f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5469f07771ccSwdenk command 5470f07771ccSwdenk 5471f07771ccSwdenkGeneral rules: 5472f07771ccSwdenk-------------- 5473f07771ccSwdenk 5474f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5475f07771ccSwdenk command) contains several commands separated by semicolon, and 5476f07771ccSwdenk one of these commands fails, then the remaining commands will be 5477f07771ccSwdenk executed anyway. 5478f07771ccSwdenk 5479f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 548011ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5481f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5482f07771ccSwdenk variables are not executed. 5483f07771ccSwdenk 5484c609719bSwdenkNote for Redundant Ethernet Interfaces: 5485c609719bSwdenk======================================= 5486c609719bSwdenk 548711ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5488c609719bSwdenksuch configurations and is capable of automatic selection of a 54897152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5490c609719bSwdenk 5491c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5492c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5493c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5494c609719bSwdenk 5495c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5496c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5497c609719bSwdenkding setting in the environment; if the corresponding environment 5498c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5499c609719bSwdenk 5500c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5501c609719bSwdenk environment, the SROM's address is used. 5502c609719bSwdenk 5503c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5504c609719bSwdenk environment exists, then the value from the environment variable is 5505c609719bSwdenk used. 5506c609719bSwdenk 5507c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5508c609719bSwdenk both addresses are the same, this MAC address is used. 5509c609719bSwdenk 5510c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5511c609719bSwdenk addresses differ, the value from the environment is used and a 5512c609719bSwdenk warning is printed. 5513c609719bSwdenk 5514c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5515c609719bSwdenk is raised. 5516c609719bSwdenk 5517ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5518ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5519ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5520ecee9324SBen WarrenThe naming convention is as follows: 5521ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5522c609719bSwdenk 5523c609719bSwdenkImage Formats: 5524c609719bSwdenk============== 5525c609719bSwdenk 55263310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 55273310c549SMarian Balakowiczimages in two formats: 55283310c549SMarian Balakowicz 55293310c549SMarian BalakowiczNew uImage format (FIT) 55303310c549SMarian Balakowicz----------------------- 55313310c549SMarian Balakowicz 55323310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 55333310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 55343310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 55353310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 55363310c549SMarian Balakowicz 55373310c549SMarian Balakowicz 55383310c549SMarian BalakowiczOld uImage format 55393310c549SMarian Balakowicz----------------- 55403310c549SMarian Balakowicz 55413310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 55423310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 55433310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5544c609719bSwdenk 5545c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5546c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5547f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5548f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5549f5ed9e39SPeter Tyser INTEGRITY). 55507b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5551afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5552afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5553c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5554c609719bSwdenk* Load Address 5555c609719bSwdenk* Entry Point 5556c609719bSwdenk* Image Name 5557c609719bSwdenk* Image Timestamp 5558c609719bSwdenk 5559c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5560c609719bSwdenkand the data portions of the image are secured against corruption by 5561c609719bSwdenkCRC32 checksums. 5562c609719bSwdenk 5563c609719bSwdenk 5564c609719bSwdenkLinux Support: 5565c609719bSwdenk============== 5566c609719bSwdenk 5567c609719bSwdenkAlthough U-Boot should support any OS or standalone application 55687152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5569c609719bSwdenkU-Boot. 5570c609719bSwdenk 5571c609719bSwdenkU-Boot includes many features that so far have been part of some 5572c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5573c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5574c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 55757152b1d0Swdenkserves several purposes: 5576c609719bSwdenk 5577c609719bSwdenk- the same features can be used for other OS or standalone 5578c609719bSwdenk applications (for instance: using compressed images to reduce the 5579c609719bSwdenk Flash memory footprint) 5580c609719bSwdenk 5581c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 55827152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5583c609719bSwdenk 5584c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5585c609719bSwdenk images; of course this also means that different kernel images can 5586c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5587c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5588c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5589c609719bSwdenk software is easier now. 5590c609719bSwdenk 5591c609719bSwdenk 5592c609719bSwdenkLinux HOWTO: 5593c609719bSwdenk============ 5594c609719bSwdenk 5595c609719bSwdenkPorting Linux to U-Boot based systems: 5596c609719bSwdenk--------------------------------------- 5597c609719bSwdenk 5598c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5599c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5600c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5601c609719bSwdenkLinux :-). 5602c609719bSwdenk 5603a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5604c609719bSwdenk 5605c609719bSwdenkJust make sure your machine specific header file (for instance 5606c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 56071dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 56081dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 56096d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5610c609719bSwdenk 56112eb31b13SSimon GlassNote that U-Boot now has a driver model, a unified model for drivers. 56122eb31b13SSimon GlassIf you are adding a new driver, plumb it into driver model. If there 56132eb31b13SSimon Glassis no uclass available, you are encouraged to create one. See 56142eb31b13SSimon Glassdoc/driver-model. 56152eb31b13SSimon Glass 5616c609719bSwdenk 5617c609719bSwdenkConfiguring the Linux kernel: 5618c609719bSwdenk----------------------------- 5619c609719bSwdenk 5620c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5621c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5622c609719bSwdenk 5623c609719bSwdenk 5624c609719bSwdenkBuilding a Linux Image: 5625c609719bSwdenk----------------------- 5626c609719bSwdenk 562724ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 562824ee89b9Swdenknot used. If you use recent kernel source, a new build target 562924ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 563024ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 563124ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 563224ee89b9Swdenk100% compatible format. 5633c609719bSwdenk 5634c609719bSwdenkExample: 5635c609719bSwdenk 5636ab584d67SHolger Freyther make TQM850L_defconfig 5637c609719bSwdenk make oldconfig 5638c609719bSwdenk make dep 563924ee89b9Swdenk make uImage 5640c609719bSwdenk 564124ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 564224ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 564324ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5644c609719bSwdenk 564524ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 564624ee89b9Swdenk 564724ee89b9Swdenk* convert the kernel into a raw binary image: 564824ee89b9Swdenk 564924ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 565024ee89b9Swdenk -R .note -R .comment \ 565124ee89b9Swdenk -S vmlinux linux.bin 565224ee89b9Swdenk 565324ee89b9Swdenk* compress the binary image: 565424ee89b9Swdenk 565524ee89b9Swdenk gzip -9 linux.bin 565624ee89b9Swdenk 565724ee89b9Swdenk* package compressed binary image for U-Boot: 565824ee89b9Swdenk 565924ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 566024ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 566124ee89b9Swdenk -d linux.bin.gz uImage 566224ee89b9Swdenk 566324ee89b9Swdenk 566424ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 566524ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 566624ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 566724ee89b9Swdenkbyte header containing information about target architecture, 566824ee89b9Swdenkoperating system, image type, compression method, entry points, time 566924ee89b9Swdenkstamp, CRC32 checksums, etc. 567024ee89b9Swdenk 567124ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 567224ee89b9Swdenkprint the header information, or to build new images. 5673c609719bSwdenk 5674c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5675c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5676c609719bSwdenkchecksum verification: 5677c609719bSwdenk 5678c609719bSwdenk tools/mkimage -l image 5679c609719bSwdenk -l ==> list image header information 5680c609719bSwdenk 5681c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5682c609719bSwdenkfrom a "data file" which is used as image payload: 5683c609719bSwdenk 5684c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5685c609719bSwdenk -n name -d data_file image 5686c609719bSwdenk -A ==> set architecture to 'arch' 5687c609719bSwdenk -O ==> set operating system to 'os' 5688c609719bSwdenk -T ==> set image type to 'type' 5689c609719bSwdenk -C ==> set compression type 'comp' 5690c609719bSwdenk -a ==> set load address to 'addr' (hex) 5691c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5692c609719bSwdenk -n ==> set image name to 'name' 5693c609719bSwdenk -d ==> use image data from 'datafile' 5694c609719bSwdenk 569569459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 569669459791Swdenkaddress (0x00000000), but the entry point address depends on the 569769459791Swdenkkernel version: 5698c609719bSwdenk 5699c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 570024ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5701c609719bSwdenk 5702c609719bSwdenkSo a typical call to build a U-Boot image would read: 5703c609719bSwdenk 570424ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 570524ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5706a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 570724ee89b9Swdenk > examples/uImage.TQM850L 570824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5709c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5710c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5711c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5712c609719bSwdenk Load Address: 0x00000000 571324ee89b9Swdenk Entry Point: 0x00000000 5714c609719bSwdenk 5715c609719bSwdenkTo verify the contents of the image (or check for corruption): 5716c609719bSwdenk 571724ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 571824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5719c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5720c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5721c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5722c609719bSwdenk Load Address: 0x00000000 572324ee89b9Swdenk Entry Point: 0x00000000 5724c609719bSwdenk 5725c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5726c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5727c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5728c609719bSwdenkneed to be uncompressed: 5729c609719bSwdenk 5730a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 573124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 573224ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5733a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 573424ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 573524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5736c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5737c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5738c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5739c609719bSwdenk Load Address: 0x00000000 574024ee89b9Swdenk Entry Point: 0x00000000 5741c609719bSwdenk 5742c609719bSwdenk 5743c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5744c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5745c609719bSwdenk 5746c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5747c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5748c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5749c609719bSwdenk Image Name: Simple Ramdisk Image 5750c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5751c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5752c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5753c609719bSwdenk Load Address: 0x00000000 5754c609719bSwdenk Entry Point: 0x00000000 5755c609719bSwdenk 5756a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5757a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5758a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5759a804b5ceSGuilherme Maciel Ferreirafrom the image: 5760a804b5ceSGuilherme Maciel Ferreira 5761a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5762a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5763a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5764a804b5ceSGuilherme Maciel Ferreira 5765c609719bSwdenk 5766c609719bSwdenkInstalling a Linux Image: 5767c609719bSwdenk------------------------- 5768c609719bSwdenk 5769c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5770c609719bSwdenkyou must convert the image to S-Record format: 5771c609719bSwdenk 5772c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5773c609719bSwdenk 5774c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5775c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5776c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5777c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5778c609719bSwdenkcommand. 5779c609719bSwdenk 5780c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5781c609719bSwdenkTQM8xxL is in the first Flash bank): 5782c609719bSwdenk 5783c609719bSwdenk => erase 40100000 401FFFFF 5784c609719bSwdenk 5785c609719bSwdenk .......... done 5786c609719bSwdenk Erased 8 sectors 5787c609719bSwdenk 5788c609719bSwdenk => loads 40100000 5789c609719bSwdenk ## Ready for S-Record download ... 5790c609719bSwdenk ~>examples/image.srec 5791c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5792c609719bSwdenk ... 5793c609719bSwdenk 15989 15990 15991 15992 5794c609719bSwdenk [file transfer complete] 5795c609719bSwdenk [connected] 5796c609719bSwdenk ## Start Addr = 0x00000000 5797c609719bSwdenk 5798c609719bSwdenk 5799c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5800c609719bSwdenkthis includes a checksum verification so you can be sure no data 5801c609719bSwdenkcorruption happened: 5802c609719bSwdenk 5803c609719bSwdenk => imi 40100000 5804c609719bSwdenk 5805c609719bSwdenk ## Checking Image at 40100000 ... 5806c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5807c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5808c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5809c609719bSwdenk Load Address: 00000000 5810c609719bSwdenk Entry Point: 0000000c 5811c609719bSwdenk Verifying Checksum ... OK 5812c609719bSwdenk 5813c609719bSwdenk 5814c609719bSwdenkBoot Linux: 5815c609719bSwdenk----------- 5816c609719bSwdenk 5817c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5818c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5819c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5820c609719bSwdenkparameters. You can check and modify this variable using the 5821c609719bSwdenk"printenv" and "setenv" commands: 5822c609719bSwdenk 5823c609719bSwdenk 5824c609719bSwdenk => printenv bootargs 5825c609719bSwdenk bootargs=root=/dev/ram 5826c609719bSwdenk 5827c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5828c609719bSwdenk 5829c609719bSwdenk => printenv bootargs 5830c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5831c609719bSwdenk 5832c609719bSwdenk => bootm 40020000 5833c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5834c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5835c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5836c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5837c609719bSwdenk Load Address: 00000000 5838c609719bSwdenk Entry Point: 0000000c 5839c609719bSwdenk Verifying Checksum ... OK 5840c609719bSwdenk Uncompressing Kernel Image ... OK 5841c609719bSwdenk Linux version 2.2.13 (wd@denx.local.net) (gcc version 2.95.2 19991024 (release)) #1 Wed Jul 19 02:35:17 MEST 2000 5842c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5843c609719bSwdenk time_init: decrementer frequency = 187500000/60 5844c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5845c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5846c609719bSwdenk ... 5847c609719bSwdenk 584811ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 58497152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5850c609719bSwdenkformat!) to the "bootm" command: 5851c609719bSwdenk 5852c609719bSwdenk => imi 40100000 40200000 5853c609719bSwdenk 5854c609719bSwdenk ## Checking Image at 40100000 ... 5855c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5856c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5857c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5858c609719bSwdenk Load Address: 00000000 5859c609719bSwdenk Entry Point: 0000000c 5860c609719bSwdenk Verifying Checksum ... OK 5861c609719bSwdenk 5862c609719bSwdenk ## Checking Image at 40200000 ... 5863c609719bSwdenk Image Name: Simple Ramdisk Image 5864c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5865c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5866c609719bSwdenk Load Address: 00000000 5867c609719bSwdenk Entry Point: 00000000 5868c609719bSwdenk Verifying Checksum ... OK 5869c609719bSwdenk 5870c609719bSwdenk => bootm 40100000 40200000 5871c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5872c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5873c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5874c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5875c609719bSwdenk Load Address: 00000000 5876c609719bSwdenk Entry Point: 0000000c 5877c609719bSwdenk Verifying Checksum ... OK 5878c609719bSwdenk Uncompressing Kernel Image ... OK 5879c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5880c609719bSwdenk Image Name: Simple Ramdisk Image 5881c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5882c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5883c609719bSwdenk Load Address: 00000000 5884c609719bSwdenk Entry Point: 00000000 5885c609719bSwdenk Verifying Checksum ... OK 5886c609719bSwdenk Loading Ramdisk ... OK 5887c609719bSwdenk Linux version 2.2.13 (wd@denx.local.net) (gcc version 2.95.2 19991024 (release)) #1 Wed Jul 19 02:32:08 MEST 2000 5888c609719bSwdenk Boot arguments: root=/dev/ram 5889c609719bSwdenk time_init: decrementer frequency = 187500000/60 5890c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5891c609719bSwdenk ... 5892c609719bSwdenk RAMDISK: Compressed image found at block 0 5893c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5894c609719bSwdenk 5895c609719bSwdenk bash# 5896c609719bSwdenk 58970267768eSMatthew McClintockBoot Linux and pass a flat device tree: 58980267768eSMatthew McClintock----------- 58990267768eSMatthew McClintock 59000267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 59010267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 59020267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 59030267768eSMatthew McClintockflat device tree: 59040267768eSMatthew McClintock 59050267768eSMatthew McClintock=> print oftaddr 59060267768eSMatthew McClintockoftaddr=0x300000 59070267768eSMatthew McClintock=> print oft 59080267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 59090267768eSMatthew McClintock=> tftp $oftaddr $oft 59100267768eSMatthew McClintockSpeed: 1000, full duplex 59110267768eSMatthew McClintockUsing TSEC0 device 59120267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 59130267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 59140267768eSMatthew McClintockLoad address: 0x300000 59150267768eSMatthew McClintockLoading: # 59160267768eSMatthew McClintockdone 59170267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 59180267768eSMatthew McClintock=> tftp $loadaddr $bootfile 59190267768eSMatthew McClintockSpeed: 1000, full duplex 59200267768eSMatthew McClintockUsing TSEC0 device 59210267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 59220267768eSMatthew McClintockFilename 'uImage'. 59230267768eSMatthew McClintockLoad address: 0x200000 59240267768eSMatthew McClintockLoading:############ 59250267768eSMatthew McClintockdone 59260267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 59270267768eSMatthew McClintock=> print loadaddr 59280267768eSMatthew McClintockloadaddr=200000 59290267768eSMatthew McClintock=> print oftaddr 59300267768eSMatthew McClintockoftaddr=0x300000 59310267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 59320267768eSMatthew McClintock## Booting image at 00200000 ... 59330267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 59340267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 59350267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 59360267768eSMatthew McClintock Load Address: 00000000 59370267768eSMatthew McClintock Entry Point: 00000000 59380267768eSMatthew McClintock Verifying Checksum ... OK 59390267768eSMatthew McClintock Uncompressing Kernel Image ... OK 59400267768eSMatthew McClintockBooting using flat device tree at 0x300000 59410267768eSMatthew McClintockUsing MPC85xx ADS machine description 59420267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 59430267768eSMatthew McClintock[snip] 59440267768eSMatthew McClintock 59450267768eSMatthew McClintock 59466069ff26SwdenkMore About U-Boot Image Types: 59476069ff26Swdenk------------------------------ 59486069ff26Swdenk 59496069ff26SwdenkU-Boot supports the following image types: 59506069ff26Swdenk 59516069ff26Swdenk "Standalone Programs" are directly runnable in the environment 59526069ff26Swdenk provided by U-Boot; it is expected that (if they behave 59536069ff26Swdenk well) you can continue to work in U-Boot after return from 59546069ff26Swdenk the Standalone Program. 59556069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 59566069ff26Swdenk will take over control completely. Usually these programs 59576069ff26Swdenk will install their own set of exception handlers, device 59586069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 59596069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 59606069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 59616069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 59626069ff26Swdenk being started. 59636069ff26Swdenk "Multi-File Images" contain several images, typically an OS 59646069ff26Swdenk (Linux) kernel image and one or more data images like 59656069ff26Swdenk RAMDisks. This construct is useful for instance when you want 59666069ff26Swdenk to boot over the network using BOOTP etc., where the boot 59676069ff26Swdenk server provides just a single image file, but you want to get 59686069ff26Swdenk for instance an OS kernel and a RAMDisk image. 59696069ff26Swdenk 59706069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 59716069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 59726069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 59736069ff26Swdenk Immediately after the terminating 0 follow the images, one by 59746069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 59756069ff26Swdenk a multiple of 4 bytes). 59766069ff26Swdenk 59776069ff26Swdenk "Firmware Images" are binary images containing firmware (like 59786069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 59796069ff26Swdenk flash memory. 59806069ff26Swdenk 59816069ff26Swdenk "Script files" are command sequences that will be executed by 59826069ff26Swdenk U-Boot's command interpreter; this feature is especially 59836069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 59846069ff26Swdenk as command interpreter. 59856069ff26Swdenk 598644f074c7SMarek VasutBooting the Linux zImage: 598744f074c7SMarek Vasut------------------------- 598844f074c7SMarek Vasut 598944f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 599044f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 599144f074c7SMarek Vasutas the syntax of "bootm" command. 599244f074c7SMarek Vasut 59938ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5994017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5995017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5996017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5997017e1f3fSMarek Vasut 5998c609719bSwdenk 5999c609719bSwdenkStandalone HOWTO: 6000c609719bSwdenk================= 6001c609719bSwdenk 6002c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 6003c609719bSwdenkrun "standalone" applications, which can use some resources of 6004c609719bSwdenkU-Boot like console I/O functions or interrupt services. 6005c609719bSwdenk 6006c609719bSwdenkTwo simple examples are included with the sources: 6007c609719bSwdenk 6008c609719bSwdenk"Hello World" Demo: 6009c609719bSwdenk------------------- 6010c609719bSwdenk 6011c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 6012c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 6013c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 6014c609719bSwdenklike that: 6015c609719bSwdenk 6016c609719bSwdenk => loads 6017c609719bSwdenk ## Ready for S-Record download ... 6018c609719bSwdenk ~>examples/hello_world.srec 6019c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 6020c609719bSwdenk [file transfer complete] 6021c609719bSwdenk [connected] 6022c609719bSwdenk ## Start Addr = 0x00040004 6023c609719bSwdenk 6024c609719bSwdenk => go 40004 Hello World! This is a test. 6025c609719bSwdenk ## Starting application at 0x00040004 ... 6026c609719bSwdenk Hello World 6027c609719bSwdenk argc = 7 6028c609719bSwdenk argv[0] = "40004" 6029c609719bSwdenk argv[1] = "Hello" 6030c609719bSwdenk argv[2] = "World!" 6031c609719bSwdenk argv[3] = "This" 6032c609719bSwdenk argv[4] = "is" 6033c609719bSwdenk argv[5] = "a" 6034c609719bSwdenk argv[6] = "test." 6035c609719bSwdenk argv[7] = "<NULL>" 6036c609719bSwdenk Hit any key to exit ... 6037c609719bSwdenk 6038c609719bSwdenk ## Application terminated, rc = 0x0 6039c609719bSwdenk 6040c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 6041c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 6042c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 6043c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 6044c609719bSwdenkcharacter, but this is just a demo program. The application can be 6045c609719bSwdenkcontrolled by the following keys: 6046c609719bSwdenk 6047c609719bSwdenk ? - print current values og the CPM Timer registers 6048c609719bSwdenk b - enable interrupts and start timer 6049c609719bSwdenk e - stop timer and disable interrupts 6050c609719bSwdenk q - quit application 6051c609719bSwdenk 6052c609719bSwdenk => loads 6053c609719bSwdenk ## Ready for S-Record download ... 6054c609719bSwdenk ~>examples/timer.srec 6055c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 6056c609719bSwdenk [file transfer complete] 6057c609719bSwdenk [connected] 6058c609719bSwdenk ## Start Addr = 0x00040004 6059c609719bSwdenk 6060c609719bSwdenk => go 40004 6061c609719bSwdenk ## Starting application at 0x00040004 ... 6062c609719bSwdenk TIMERS=0xfff00980 6063c609719bSwdenk Using timer 1 6064c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 6065c609719bSwdenk 6066c609719bSwdenkHit 'b': 6067c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 6068c609719bSwdenk Enabling timer 6069c609719bSwdenkHit '?': 6070c609719bSwdenk [q, b, e, ?] ........ 6071c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 6072c609719bSwdenkHit '?': 6073c609719bSwdenk [q, b, e, ?] . 6074c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 6075c609719bSwdenkHit '?': 6076c609719bSwdenk [q, b, e, ?] . 6077c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 6078c609719bSwdenkHit '?': 6079c609719bSwdenk [q, b, e, ?] . 6080c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 6081c609719bSwdenkHit 'e': 6082c609719bSwdenk [q, b, e, ?] ...Stopping timer 6083c609719bSwdenkHit 'q': 6084c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 6085c609719bSwdenk 6086c609719bSwdenk 608785ec0bccSwdenkMinicom warning: 608885ec0bccSwdenk================ 608985ec0bccSwdenk 60907152b1d0SwdenkOver time, many people have reported problems when trying to use the 609185ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 609285ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 6093f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 609485ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 6095e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 6096e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 6097e53515a2SKarl O. Pincfor help with kermit. 6098e53515a2SKarl O. Pinc 609985ec0bccSwdenk 610052f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 610152f52c14Swdenkconfiguration to your "File transfer protocols" section: 610252f52c14Swdenk 610352f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 610452f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 610552f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 610652f52c14Swdenk 610752f52c14Swdenk 6108c609719bSwdenkNetBSD Notes: 6109c609719bSwdenk============= 6110c609719bSwdenk 6111c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 6112c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 6113c609719bSwdenk 6114c609719bSwdenkBuilding requires a cross environment; it is known to work on 6115c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 6116c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 6117c609719bSwdenkNote that the cross-powerpc package does not install include files; 6118c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 6119c609719bSwdenkmissing. This file has to be installed and patched manually: 6120c609719bSwdenk 6121c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 6122c609719bSwdenk # mkdir powerpc 6123c609719bSwdenk # ln -s powerpc machine 6124c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 6125c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 6126c609719bSwdenk 6127c609719bSwdenkNative builds *don't* work due to incompatibilities between native 6128c609719bSwdenkand U-Boot include files. 6129c609719bSwdenk 6130c609719bSwdenkBooting assumes that (the first part of) the image booted is a 6131c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 6132c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 6133c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 61342a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 6135c609719bSwdenk 6136c609719bSwdenk 6137c609719bSwdenkImplementation Internals: 6138c609719bSwdenk========================= 6139c609719bSwdenk 6140c609719bSwdenkThe following is not intended to be a complete description of every 6141c609719bSwdenkimplementation detail. However, it should help to understand the 6142c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 6143c609719bSwdenkhardware. 6144c609719bSwdenk 6145c609719bSwdenk 6146c609719bSwdenkInitial Stack, Global Data: 6147c609719bSwdenk--------------------------- 6148c609719bSwdenk 6149c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 6150c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 6151c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 6152c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 6153c609719bSwdenkis not initialized as zero. To be able to get a C environment working 6154c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 6155c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 6156c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 6157c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 6158c609719bSwdenklocked as (mis-) used as memory, etc. 6159c609719bSwdenk 61607152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 61610668236bSWolfgang Denk U-Boot mailing list: 616243d9616cSwdenk 616343d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 616443d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 616543d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 616643d9616cSwdenk ... 616743d9616cSwdenk 616843d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 616943d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 617043d9616cSwdenk require any physical RAM backing up the cache. The cleverness 617143d9616cSwdenk is that the cache is being used as a temporary supply of 617243d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 617311ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 617443d9616cSwdenk can see how this works by studying the cache architecture and 617543d9616cSwdenk operation in the architecture and processor-specific manuals. 617643d9616cSwdenk 617743d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 617843d9616cSwdenk is another option for the system designer to use as an 617911ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 618043d9616cSwdenk option should work for you. Using CS 4 should be fine if your 618143d9616cSwdenk board designers haven't used it for something that would 618243d9616cSwdenk cause you grief during the initial boot! It is frequently not 618343d9616cSwdenk used. 618443d9616cSwdenk 61856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 618643d9616cSwdenk with your processor/board/system design. The default value 618743d9616cSwdenk you will find in any recent u-boot distribution in 61888a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 618943d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 619043d9616cSwdenk it above 400_0000. Just make sure your board has no resources 619143d9616cSwdenk that are supposed to respond to that address! That code in 619243d9616cSwdenk start.S has been around a while and should work as is when 619343d9616cSwdenk you get the config right. 619443d9616cSwdenk 619543d9616cSwdenk -Chris Hallinan 619643d9616cSwdenk DS4.COM, Inc. 619743d9616cSwdenk 6198c609719bSwdenkIt is essential to remember this, since it has some impact on the C 6199c609719bSwdenkcode for the initialization procedures: 6200c609719bSwdenk 6201c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 6202c609719bSwdenk to write it. 6203c609719bSwdenk 620411ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 6205c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 62067152b1d0Swdenk zation is performed later (when relocating to RAM). 6207c609719bSwdenk 6208c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 6209c609719bSwdenk that. 6210c609719bSwdenk 6211c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 6212c609719bSwdenknormal global data to share information beween the code. But it 6213c609719bSwdenkturned out that the implementation of U-Boot can be greatly 6214c609719bSwdenksimplified by making a global data structure (gd_t) available to all 6215c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 6216c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 6217c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 6218c609719bSwdenkplace a pointer (gd) to the global data into a register which we 6219c609719bSwdenkreserve for this purpose. 6220c609719bSwdenk 62217152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 6222c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 6223c609719bSwdenkGCC's implementation. 6224c609719bSwdenk 6225c609719bSwdenkFor PowerPC, the following registers have specific use: 6226c609719bSwdenk R1: stack pointer 6227e7670f6cSWolfgang Denk R2: reserved for system use 6228c609719bSwdenk R3-R4: parameter passing and return values 6229c609719bSwdenk R5-R10: parameter passing 6230c609719bSwdenk R13: small data area pointer 6231c609719bSwdenk R30: GOT pointer 6232c609719bSwdenk R31: frame pointer 6233c609719bSwdenk 6234e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 6235e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 6236e6bee808SJoakim Tjernlund going back and forth between asm and C) 6237c609719bSwdenk 6238e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 6239c609719bSwdenk 6240c609719bSwdenk Note: on PPC, we could use a static initializer (since the 6241c609719bSwdenk address of the global data structure is known at compile time), 6242c609719bSwdenk but it turned out that reserving a register results in somewhat 6243c609719bSwdenk smaller code - although the code savings are not that big (on 6244c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 6245c609719bSwdenk 624 text + 127 data). 6246c609719bSwdenk 6247c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 62484c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 62494c58eb55SMike Frysinger 6250c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 62514c58eb55SMike Frysinger 6252c609719bSwdenkOn ARM, the following registers are used: 6253c609719bSwdenk 6254c609719bSwdenk R0: function argument word/integer result 6255c609719bSwdenk R1-R3: function argument word 625612eba1b4SJeroen Hofstee R9: platform specific 625712eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 6258c609719bSwdenk R11: argument (frame) pointer 6259c609719bSwdenk R12: temporary workspace 6260c609719bSwdenk R13: stack pointer 6261c609719bSwdenk R14: link register 6262c609719bSwdenk R15: program counter 6263c609719bSwdenk 626412eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 626512eba1b4SJeroen Hofstee 626612eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 6267c609719bSwdenk 62680df01fd3SThomas ChouOn Nios II, the ABI is documented here: 62690df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 62700df01fd3SThomas Chou 62710df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 62720df01fd3SThomas Chou 62730df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 62740df01fd3SThomas Chou to access small data sections, so gp is free. 62750df01fd3SThomas Chou 6276afc1ce82SMacpaul LinOn NDS32, the following registers are used: 6277afc1ce82SMacpaul Lin 6278afc1ce82SMacpaul Lin R0-R1: argument/return 6279afc1ce82SMacpaul Lin R2-R5: argument 6280afc1ce82SMacpaul Lin R15: temporary register for assembler 6281afc1ce82SMacpaul Lin R16: trampoline register 6282afc1ce82SMacpaul Lin R28: frame pointer (FP) 6283afc1ce82SMacpaul Lin R29: global pointer (GP) 6284afc1ce82SMacpaul Lin R30: link register (LP) 6285afc1ce82SMacpaul Lin R31: stack pointer (SP) 6286afc1ce82SMacpaul Lin PC: program counter (PC) 6287afc1ce82SMacpaul Lin 6288afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 6289afc1ce82SMacpaul Lin 6290d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 6291d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 6292c609719bSwdenk 6293c609719bSwdenkMemory Management: 6294c609719bSwdenk------------------ 6295c609719bSwdenk 6296c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 6297c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 6298c609719bSwdenk 6299c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 6300c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 6301c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 6302c609719bSwdenkphysical memory banks. 6303c609719bSwdenk 6304c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 6305c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 6306c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 6307c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 63086d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 6309c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 6310c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 6311c609719bSwdenk 6312c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 6313c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 6314c609719bSwdenk 6315c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 6316c609719bSwdenkthis: 6317c609719bSwdenk 6318c609719bSwdenk 0x0000 0000 Exception Vector code 6319c609719bSwdenk : 6320c609719bSwdenk 0x0000 1FFF 6321c609719bSwdenk 0x0000 2000 Free for Application Use 6322c609719bSwdenk : 6323c609719bSwdenk : 6324c609719bSwdenk 6325c609719bSwdenk : 6326c609719bSwdenk : 6327c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 6328c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 6329c609719bSwdenk 0x00FC 0000 Malloc Arena 6330c609719bSwdenk : 6331c609719bSwdenk 0x00FD FFFF 6332c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 6333c609719bSwdenk ... eventually: LCD or video framebuffer 6334c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 6335c609719bSwdenk 0x00FF FFFF [End of RAM] 6336c609719bSwdenk 6337c609719bSwdenk 6338c609719bSwdenkSystem Initialization: 6339c609719bSwdenk---------------------- 6340c609719bSwdenk 6341c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 634211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 6343c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 63447152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 6345c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 6346c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 6347c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 6348c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 6349c609719bSwdenkthe caches and the SIU. 6350c609719bSwdenk 6351c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 6352c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 6353c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 6354c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 6355c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 6356c609719bSwdenksimple memory test is run that determines the size of the SDRAM 6357c609719bSwdenkbanks. 6358c609719bSwdenk 6359c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 63607152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 6361c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 6362c609719bSwdenk0x00000000, with any additional banks following immediately to create 6363c609719bSwdenkcontiguous memory starting from 0. 6364c609719bSwdenk 6365c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 6366c609719bSwdenkand allocates memory for use by malloc() and for the global Board 6367c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 6368c609719bSwdenkpages, and the final stack is set up. 6369c609719bSwdenk 6370c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 6371c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 6372c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 6373c609719bSwdenknew address in RAM. 6374c609719bSwdenk 6375c609719bSwdenk 6376c609719bSwdenkU-Boot Porting Guide: 6377c609719bSwdenk---------------------- 6378c609719bSwdenk 6379c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 63806aff3115Swdenklist, October 2002] 6381c609719bSwdenk 6382c609719bSwdenk 6383c609719bSwdenkint main(int argc, char *argv[]) 6384c609719bSwdenk{ 6385c609719bSwdenk sighandler_t no_more_time; 6386c609719bSwdenk 6387c609719bSwdenk signal(SIGALRM, no_more_time); 6388c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6389c609719bSwdenk 6390c609719bSwdenk if (available_money > available_manpower) { 63916c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6392c609719bSwdenk return 0; 6393c609719bSwdenk } 6394c609719bSwdenk 6395c609719bSwdenk Download latest U-Boot source; 6396c609719bSwdenk 63970668236bSWolfgang Denk Subscribe to u-boot mailing list; 63986aff3115Swdenk 63996c3fef28SJerry Van Baren if (clueless) 6400c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6401c609719bSwdenk 6402c609719bSwdenk while (learning) { 6403c609719bSwdenk Read the README file in the top level directory; 64047cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 64056c3fef28SJerry Van Baren Read applicable doc/*.README; 6406c609719bSwdenk Read the source, Luke; 64076c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6408c609719bSwdenk } 6409c609719bSwdenk 64106c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 64116c3fef28SJerry Van Baren Buy a BDI3000; 64126c3fef28SJerry Van Baren else 6413c609719bSwdenk Add a lot of aggravation and time; 6414c609719bSwdenk 64156c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 64166c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 64176c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 64186c3fef28SJerry Van Baren } else { 6419c609719bSwdenk Create your own board support subdirectory; 64206c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 64216c3fef28SJerry Van Baren } 64226c3fef28SJerry Van Baren Edit new board/<myboard> files 64236c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6424c609719bSwdenk 64256c3fef28SJerry Van Baren while (!accepted) { 6426c609719bSwdenk while (!running) { 6427c609719bSwdenk do { 6428c609719bSwdenk Add / modify source code; 6429c609719bSwdenk } until (compiles); 6430c609719bSwdenk Debug; 6431c609719bSwdenk if (clueless) 6432c609719bSwdenk email("Hi, I am having problems..."); 6433c609719bSwdenk } 64346c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 64356c3fef28SJerry Van Baren if (reasonable critiques) 64366c3fef28SJerry Van Baren Incorporate improvements from email list code review; 64376c3fef28SJerry Van Baren else 64386c3fef28SJerry Van Baren Defend code as written; 64396c3fef28SJerry Van Baren } 6440c609719bSwdenk 6441c609719bSwdenk return 0; 6442c609719bSwdenk} 6443c609719bSwdenk 6444c609719bSwdenkvoid no_more_time (int sig) 6445c609719bSwdenk{ 6446c609719bSwdenk hire_a_guru(); 6447c609719bSwdenk} 6448c609719bSwdenk 6449c609719bSwdenk 6450c609719bSwdenkCoding Standards: 6451c609719bSwdenk----------------- 6452c609719bSwdenk 6453c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 64542c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 64557ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6456c609719bSwdenk 64572c051651SDetlev ZundelSource files originating from a different project (for example the 64582c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 64592c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 64602c051651SDetlev Zundelsources. 64612c051651SDetlev Zundel 64622c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 64632c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 64642c051651SDetlev Zundelin your code. 6465c609719bSwdenk 6466c178d3daSwdenkPlease also stick to the following formatting rules: 6467180d3f74Swdenk- remove any trailing white space 64687ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6469180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 64707ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6471180d3f74Swdenk- do not add trailing empty lines to source files 6472180d3f74Swdenk 6473c609719bSwdenkSubmissions which do not conform to the standards may be returned 6474c609719bSwdenkwith a request to reformat the changes. 6475c609719bSwdenk 6476c609719bSwdenk 6477c609719bSwdenkSubmitting Patches: 6478c609719bSwdenk------------------- 6479c609719bSwdenk 6480c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6481c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6482c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6483c609719bSwdenk 64840d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6485218ca724SWolfgang Denk 64860668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 64870668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 64880668236bSWolfgang Denk 6489c609719bSwdenkWhen you send a patch, please include the following information with 6490c609719bSwdenkit: 6491c609719bSwdenk 6492c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6493c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6494c609719bSwdenk patch actually fixes something. 6495c609719bSwdenk 6496c609719bSwdenk* For new features: a description of the feature and your 6497c609719bSwdenk implementation. 6498c609719bSwdenk 6499c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6500c609719bSwdenk 6501c609719bSwdenk* For major contributions, your entry to the CREDITS file 6502c609719bSwdenk 650327af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 650427af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6505c609719bSwdenk 6506c609719bSwdenk* If your patch adds new configuration options, don't forget to 6507c609719bSwdenk document these in the README file. 6508c609719bSwdenk 6509218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6510218ca724SWolfgang Denk recommended) you can easily generate the patch using the 65117ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6512218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6513218ca724SWolfgang Denk with some other mail clients. 6514c609719bSwdenk 6515218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6516218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6517218ca724SWolfgang Denk GNU diff. 65186dff5529Swdenk 6519218ca724SWolfgang Denk The current directory when running this command shall be the parent 6520218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6521218ca724SWolfgang Denk your patch includes sufficient directory information for the 6522218ca724SWolfgang Denk affected files). 6523218ca724SWolfgang Denk 6524218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6525218ca724SWolfgang Denk and compressed attachments must not be used. 6526c609719bSwdenk 652752f52c14Swdenk* If one logical set of modifications affects or creates several 652852f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 652952f52c14Swdenk 653052f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 653152f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 653252f52c14Swdenk 653352f52c14Swdenk 6534c609719bSwdenkNotes: 6535c609719bSwdenk 6536c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6537c609719bSwdenk source tree and make sure that no errors or warnings are reported 6538c609719bSwdenk for any of the boards. 6539c609719bSwdenk 6540c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6541c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6542c609719bSwdenk returned with a request to re-formatting / split it. 6543c609719bSwdenk 6544c609719bSwdenk* If you modify existing code, make sure that your new code does not 6545c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6546c609719bSwdenk When adding new features, these should compile conditionally only 6547c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6548c609719bSwdenk disabled must not need more memory than the old code without your 6549c609719bSwdenk modification. 655090dc6704Swdenk 65510668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 65520668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 65530668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 65540668236bSWolfgang Denk bigger than the size limit should be avoided. 6555