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 626795659dcSStephen Warren- CPU timer options: 627795659dcSStephen Warren CONFIG_SYS_HZ 628795659dcSStephen Warren 629795659dcSStephen Warren The frequency of the timer returned by get_timer(). 630795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 631795659dcSStephen Warren option must be set to 1000. 632795659dcSStephen Warren 6335da627a4Swdenk- Linux Kernel Interface: 634c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 635c609719bSwdenk 636c609719bSwdenk U-Boot stores all clock information in Hz 637c609719bSwdenk internally. For binary compatibility with older Linux 638c609719bSwdenk kernels (which expect the clocks passed in the 639c609719bSwdenk bd_info data to be in MHz) the environment variable 640c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 641c609719bSwdenk converts clock data to MHZ before passing it to the 642c609719bSwdenk Linux kernel. 643c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 644c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 645c609719bSwdenk default environment. 646c609719bSwdenk 6475da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6485da627a4Swdenk 64911ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6505da627a4Swdenk expect it to be in bytes, others in MB. 6515da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6525da627a4Swdenk 653fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 654f57f70aaSWolfgang Denk 655f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 656213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 657213bf8c8SGerald Van Baren concepts). 658213bf8c8SGerald Van Baren 659213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 660213bf8c8SGerald Van Baren * New libfdt-based support 661213bf8c8SGerald Van Baren * Adds the "fdt" command 6623bb342fcSKim Phillips * The bootm command automatically updates the fdt 663213bf8c8SGerald Van Baren 664b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 665b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 666b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 667b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 668f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 669c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 670f57f70aaSWolfgang Denk 67111ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 67211ccc33fSMarcel Ziswiler addresses 6733bb342fcSKim Phillips 6744e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6754e253137SKumar Gala 6764e253137SKumar Gala Board code has addition modification that it wants to make 6774e253137SKumar Gala to the flat device tree before handing it off to the kernel 6786705d81eSwdenk 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 1468*6e9e0626SOleksandr Tymoshenko CONFIG_USB_DWC2_REG_ADDR the physical CPU address of the DWC2 1469*6e9e0626SOleksandr Tymoshenko HW module registers. 1470*6e9e0626SOleksandr 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: 2728c609719bSwdenk CONFIG_IDENT_STRING 2729c609719bSwdenk 2730c609719bSwdenk If defined, this string will be added to the U-Boot 2731c609719bSwdenk version information (U_BOOT_VERSION) 2732c609719bSwdenk 2733c609719bSwdenk- Vendor Parameter Protection: 2734c609719bSwdenk 2735c609719bSwdenk U-Boot considers the values of the environment 2736c609719bSwdenk variables "serial#" (Board Serial Number) and 27377152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2738c609719bSwdenk are set once by the board vendor / manufacturer, and 2739c609719bSwdenk protects these variables from casual modification by 2740c609719bSwdenk the user. Once set, these variables are read-only, 2741c609719bSwdenk and write or delete attempts are rejected. You can 274211ccc33fSMarcel Ziswiler change this behaviour: 2743c609719bSwdenk 2744c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2745c609719bSwdenk file, the write protection for vendor parameters is 274647cd00faSwdenk completely disabled. Anybody can change or delete 2747c609719bSwdenk these parameters. 2748c609719bSwdenk 2749c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2750c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 275111ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2752c609719bSwdenk which can be changed exactly ONCE by the user. [The 2753c609719bSwdenk serial# is unaffected by this, i. e. it remains 2754c609719bSwdenk read-only.] 2755c609719bSwdenk 27562598090bSJoe Hershberger The same can be accomplished in a more flexible way 27572598090bSJoe Hershberger for any variable by configuring the type of access 27582598090bSJoe Hershberger to allow for those variables in the ".flags" variable 27592598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 27602598090bSJoe Hershberger 2761c609719bSwdenk- Protected RAM: 2762c609719bSwdenk CONFIG_PRAM 2763c609719bSwdenk 2764c609719bSwdenk Define this variable to enable the reservation of 2765c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2766c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2767c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2768c609719bSwdenk this default value by defining an environment 2769c609719bSwdenk variable "pram" to the number of kB you want to 2770c609719bSwdenk reserve. Note that the board info structure will 2771c609719bSwdenk still show the full amount of RAM. If pRAM is 2772c609719bSwdenk reserved, a new environment variable "mem" will 2773c609719bSwdenk automatically be defined to hold the amount of 2774c609719bSwdenk remaining RAM in a form that can be passed as boot 2775c609719bSwdenk argument to Linux, for instance like that: 2776c609719bSwdenk 2777fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2778c609719bSwdenk saveenv 2779c609719bSwdenk 2780c609719bSwdenk This way you can tell Linux not to use this memory, 2781c609719bSwdenk either, which results in a memory region that will 2782c609719bSwdenk not be affected by reboots. 2783c609719bSwdenk 2784c609719bSwdenk *WARNING* If your board configuration uses automatic 2785c609719bSwdenk detection of the RAM size, you must make sure that 2786c609719bSwdenk this memory test is non-destructive. So far, the 2787c609719bSwdenk following board configurations are known to be 2788c609719bSwdenk "pRAM-clean": 2789c609719bSwdenk 27901b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 27911b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2792544d97e9SWolfgang Denk FLAGADM, TQM8260 2793c609719bSwdenk 279440fef049SGabe Black- Access to physical memory region (> 4GB) 279540fef049SGabe Black Some basic support is provided for operations on memory not 279640fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 279740fef049SGabe Black support access to more than 4GB of memory on 32-bit 279840fef049SGabe Black machines using physical address extension or similar. 279940fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 280040fef049SGabe Black currently only supports clearing the memory. 280140fef049SGabe Black 2802c609719bSwdenk- Error Recovery: 2803c609719bSwdenk CONFIG_PANIC_HANG 2804c609719bSwdenk 2805c609719bSwdenk Define this variable to stop the system in case of a 2806c609719bSwdenk fatal error, so that you have to reset it manually. 2807c609719bSwdenk This is probably NOT a good idea for an embedded 280811ccc33fSMarcel Ziswiler system where you want the system to reboot 2809c609719bSwdenk automatically as fast as possible, but it may be 2810c609719bSwdenk useful during development since you can try to debug 2811c609719bSwdenk the conditions that lead to the situation. 2812c609719bSwdenk 2813c609719bSwdenk CONFIG_NET_RETRY_COUNT 2814c609719bSwdenk 2815c609719bSwdenk This variable defines the number of retries for 2816c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2817c609719bSwdenk before giving up the operation. If not defined, a 2818c609719bSwdenk default value of 5 is used. 2819c609719bSwdenk 282040cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 282140cb90eeSGuennadi Liakhovetski 282240cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 282340cb90eeSGuennadi Liakhovetski 282448a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 282548a3e999STetsuyuki Kobayashi 282648a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 282748a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 282848a3e999STetsuyuki Kobayashi try longer timeout such as 282948a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 283048a3e999STetsuyuki Kobayashi 2831c609719bSwdenk- Command Interpreter: 28328078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 283304a85b3bSwdenk 283404a85b3bSwdenk Enable auto completion of commands using TAB. 283504a85b3bSwdenk 28368078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 28378078f1a5SWolfgang Denk for the "hush" shell. 28388078f1a5SWolfgang Denk 28398078f1a5SWolfgang Denk 28406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2841c609719bSwdenk 2842c609719bSwdenk Define this variable to enable the "hush" shell (from 2843c609719bSwdenk Busybox) as command line interpreter, thus enabling 2844c609719bSwdenk powerful command line syntax like 2845c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2846c609719bSwdenk constructs ("shell scripts"). 2847c609719bSwdenk 2848c609719bSwdenk If undefined, you get the old, much simpler behaviour 2849c609719bSwdenk with a somewhat smaller memory footprint. 2850c609719bSwdenk 2851c609719bSwdenk 28526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2853c609719bSwdenk 2854c609719bSwdenk This defines the secondary prompt string, which is 2855c609719bSwdenk printed when the command interpreter needs more input 2856c609719bSwdenk to complete a command. Usually "> ". 2857c609719bSwdenk 2858c609719bSwdenk Note: 2859c609719bSwdenk 2860c609719bSwdenk In the current implementation, the local variables 2861c609719bSwdenk space and global environment variables space are 2862c609719bSwdenk separated. Local variables are those you define by 28633b57fe0aSwdenk simply typing `name=value'. To access a local 2864c609719bSwdenk variable later on, you have write `$name' or 28653b57fe0aSwdenk `${name}'; to execute the contents of a variable 28663b57fe0aSwdenk directly type `$name' at the command prompt. 2867c609719bSwdenk 2868c609719bSwdenk Global environment variables are those you use 2869c609719bSwdenk setenv/printenv to work with. To run a command stored 2870c609719bSwdenk in such a variable, you need to use the run command, 2871c609719bSwdenk and you must not use the '$' sign to access them. 2872c609719bSwdenk 2873c609719bSwdenk To store commands and special characters in a 2874c609719bSwdenk variable, please use double quotation marks 2875c609719bSwdenk surrounding the whole text of the variable, instead 2876c609719bSwdenk of the backslashes before semicolons and special 2877c609719bSwdenk symbols. 2878c609719bSwdenk 2879aa0c71acSWolfgang Denk- Commandline Editing and History: 2880aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2881aa0c71acSWolfgang Denk 288211ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2883aa0c71acSWolfgang Denk commandline input operations 2884aa0c71acSWolfgang Denk 2885a8c7c708Swdenk- Default Environment: 2886c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2887c609719bSwdenk 2888c609719bSwdenk Define this to contain any number of null terminated 2889c609719bSwdenk strings (variable = value pairs) that will be part of 28907152b1d0Swdenk the default environment compiled into the boot image. 28912262cfeeSwdenk 2892c609719bSwdenk For example, place something like this in your 2893c609719bSwdenk board's config file: 2894c609719bSwdenk 2895c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2896c609719bSwdenk "myvar1=value1\0" \ 2897c609719bSwdenk "myvar2=value2\0" 2898c609719bSwdenk 2899c609719bSwdenk Warning: This method is based on knowledge about the 2900c609719bSwdenk internal format how the environment is stored by the 29012262cfeeSwdenk U-Boot code. This is NOT an official, exported 2902c609719bSwdenk interface! Although it is unlikely that this format 29037152b1d0Swdenk will change soon, there is no guarantee either. 2904c609719bSwdenk You better know what you are doing here. 2905c609719bSwdenk 2906c609719bSwdenk Note: overly (ab)use of the default environment is 2907c609719bSwdenk discouraged. Make sure to check other ways to preset 290874de7aefSWolfgang Denk the environment like the "source" command or the 2909c609719bSwdenk boot command first. 2910c609719bSwdenk 29115e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 29125e724ca2SStephen Warren 29135e724ca2SStephen Warren Define this in order to add variables describing the 29145e724ca2SStephen Warren U-Boot build configuration to the default environment. 29155e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 29165e724ca2SStephen Warren 29175e724ca2SStephen Warren Enabling this option will cause the following to be defined: 29185e724ca2SStephen Warren 29195e724ca2SStephen Warren - CONFIG_SYS_ARCH 29205e724ca2SStephen Warren - CONFIG_SYS_CPU 29215e724ca2SStephen Warren - CONFIG_SYS_BOARD 29225e724ca2SStephen Warren - CONFIG_SYS_VENDOR 29235e724ca2SStephen Warren - CONFIG_SYS_SOC 29245e724ca2SStephen Warren 29257e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 29267e27f89fSTom Rini 29277e27f89fSTom Rini Define this in order to add variables describing certain 29287e27f89fSTom Rini run-time determined information about the hardware to the 29297e27f89fSTom Rini environment. These will be named board_name, board_rev. 29307e27f89fSTom Rini 293106fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 293206fd8538SSimon Glass 293306fd8538SSimon Glass Normally the environment is loaded when the board is 293406fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 293506fd8538SSimon Glass that so that the environment is not available until 293606fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 293706fd8538SSimon Glass this is instead controlled by the value of 293806fd8538SSimon Glass /config/load-environment. 293906fd8538SSimon Glass 2940a8c7c708Swdenk- DataFlash Support: 29412abbe075Swdenk CONFIG_HAS_DATAFLASH 29422abbe075Swdenk 29432abbe075Swdenk Defining this option enables DataFlash features and 29442abbe075Swdenk allows to read/write in Dataflash via the standard 29452abbe075Swdenk commands cp, md... 29462abbe075Swdenk 2947f61ec45eSEric Nelson- Serial Flash support 2948f61ec45eSEric Nelson CONFIG_CMD_SF 2949f61ec45eSEric Nelson 2950f61ec45eSEric Nelson Defining this option enables SPI flash commands 2951f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2952f61ec45eSEric Nelson 2953f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2954f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2955f61ec45eSEric Nelson commands. 2956f61ec45eSEric Nelson 2957f61ec45eSEric Nelson The following defaults may be provided by the platform 2958f61ec45eSEric Nelson to handle the common case when only a single serial 2959f61ec45eSEric Nelson flash is present on the system. 2960f61ec45eSEric Nelson 2961f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2962f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2963f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2964f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2965f61ec45eSEric Nelson 296624007273SSimon Glass CONFIG_CMD_SF_TEST 296724007273SSimon Glass 296824007273SSimon Glass Define this option to include a destructive SPI flash 296924007273SSimon Glass test ('sf test'). 297024007273SSimon Glass 29711dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 29721dcd6d03SJagannadha Sutradharudu Teki 29731dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 29741dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 29751dcd6d03SJagannadha Sutradharudu Teki 2976b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2977b902e07cSJagannadha Sutradharudu Teki 2978b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2979b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2980b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2981b902e07cSJagannadha Sutradharudu Teki 2982562f8df1SHeiko Schocher CONFIG_SYS_SPI_ST_ENABLE_WP_PIN 2983562f8df1SHeiko Schocher enable the W#/Vpp signal to disable writing to the status 2984562f8df1SHeiko Schocher register on ST MICRON flashes like the N25Q128. 2985562f8df1SHeiko Schocher The status register write enable/disable bit, combined with 2986562f8df1SHeiko Schocher the W#/VPP signal provides hardware data protection for the 2987562f8df1SHeiko Schocher device as follows: When the enable/disable bit is set to 1, 2988562f8df1SHeiko Schocher and the W#/VPP signal is driven LOW, the status register 2989562f8df1SHeiko Schocher nonvolatile bits become read-only and the WRITE STATUS REGISTER 2990562f8df1SHeiko Schocher operation will not execute. The only way to exit this 2991562f8df1SHeiko Schocher hardware-protected mode is to drive W#/VPP HIGH. 2992562f8df1SHeiko Schocher 29933f85ce27Swdenk- SystemACE Support: 29943f85ce27Swdenk CONFIG_SYSTEMACE 29953f85ce27Swdenk 29963f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 29973f85ce27Swdenk chips attached via some sort of local bus. The address 299811ccc33fSMarcel Ziswiler of the chip must also be defined in the 29996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 30003f85ce27Swdenk 30013f85ce27Swdenk #define CONFIG_SYSTEMACE 30026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 30033f85ce27Swdenk 30043f85ce27Swdenk When SystemACE support is added, the "ace" device type 30053f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 30063f85ce27Swdenk 3007ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 3008ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 3009ecb0ccd9SWolfgang Denk 301028cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 3011ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 301228cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 3013ecb0ccd9SWolfgang Denk number generator is used. 3014ecb0ccd9SWolfgang Denk 301528cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 301628cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 301728cb9375SWolfgang Denk defined, the normal port 69 is used. 301828cb9375SWolfgang Denk 301928cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 3020ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 3021ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 3022ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 3023ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 3024ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 3025ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 3026ecb0ccd9SWolfgang Denk 3027bf36c5d5SSimon Glass- Hashing support: 3028bf36c5d5SSimon Glass CONFIG_CMD_HASH 3029bf36c5d5SSimon Glass 3030bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 3031bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 3032bf36c5d5SSimon Glass 3033bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 3034bf36c5d5SSimon Glass 3035bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 3036bf36c5d5SSimon Glass size a little. 3037bf36c5d5SSimon Glass 3038bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 3039bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 3040bf36c5d5SSimon Glass 3041bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 3042bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 3043bf36c5d5SSimon Glass 3044a11f1873SRobert Winkler- Freescale i.MX specific commands: 3045a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 3046a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 3047a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 3048a11f1873SRobert Winkler 3049a11f1873SRobert Winkler CONFIG_CMD_BMODE 3050a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 3051a11f1873SRobert Winkler a boot from specific media. 3052a11f1873SRobert Winkler 3053a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 3054a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 3055a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 3056a11f1873SRobert Winkler will set it back to normal. This command currently 3057a11f1873SRobert Winkler supports i.MX53 and i.MX6. 3058a11f1873SRobert Winkler 305919c402afSSimon Glass- Signing support: 306019c402afSSimon Glass CONFIG_RSA 306119c402afSSimon Glass 306219c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 30638bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 306419c402afSSimon Glass 306519c402afSSimon Glass The signing part is build into mkimage regardless of this 306619c402afSSimon Glass option. 306719c402afSSimon Glass 30689e50c406SHeiko Schocher- bootcount support: 30699e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 30709e50c406SHeiko Schocher 30719e50c406SHeiko Schocher This enables the bootcounter support, see: 30729e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 30739e50c406SHeiko Schocher 30749e50c406SHeiko Schocher CONFIG_AT91SAM9XE 30759e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 30769e50c406SHeiko Schocher CONFIG_BLACKFIN 30779e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 30789e50c406SHeiko Schocher CONFIG_SOC_DA8XX 30799e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 30809e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 30819e50c406SHeiko Schocher enable support for the bootcounter in RAM 30829e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 30839e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 30849e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 30859e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 30869e50c406SHeiko Schocher the bootcounter. 30879e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 308819c402afSSimon Glass 3089a8c7c708Swdenk- Show boot progress: 3090c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 3091c609719bSwdenk 3092c609719bSwdenk Defining this option allows to add some board- 3093c609719bSwdenk specific code (calling a user-provided function 3094c609719bSwdenk "show_boot_progress(int)") that enables you to show 3095c609719bSwdenk the system's boot progress on some display (for 3096c609719bSwdenk example, some LED's) on your board. At the moment, 3097c609719bSwdenk the following checkpoints are implemented: 3098c609719bSwdenk 30993a608ca0SSimon Glass- Detailed boot stage timing 31003a608ca0SSimon Glass CONFIG_BOOTSTAGE 31013a608ca0SSimon Glass Define this option to get detailed timing of each stage 31023a608ca0SSimon Glass of the boot process. 31033a608ca0SSimon Glass 31043a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 31053a608ca0SSimon Glass This is the number of available user bootstage records. 31063a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 31073a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 31083a608ca0SSimon Glass the limit, recording will stop. 31093a608ca0SSimon Glass 31103a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 31113a608ca0SSimon Glass Define this to print a report before boot, similar to this: 31123a608ca0SSimon Glass 31133a608ca0SSimon Glass Timer summary in microseconds: 31143a608ca0SSimon Glass Mark Elapsed Stage 31153a608ca0SSimon Glass 0 0 reset 31163a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 31173a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 31183a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 31193a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 31203a608ca0SSimon Glass 3,910,375 250,777 main_loop 31213a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 31223a608ca0SSimon Glass 30,361,327 445,160 start_kernel 31233a608ca0SSimon Glass 31242eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 31252eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 31262eba38cfSSimon Glass and un/stashing of bootstage data. 31272eba38cfSSimon Glass 312894fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 312994fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 313094fd1316SSimon Glass node is created with each bootstage id as a child. Each child 313194fd1316SSimon Glass has a 'name' property and either 'mark' containing the 313294fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 313394fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 313494fd1316SSimon Glass For example: 313594fd1316SSimon Glass 313694fd1316SSimon Glass bootstage { 313794fd1316SSimon Glass 154 { 313894fd1316SSimon Glass name = "board_init_f"; 313994fd1316SSimon Glass mark = <3575678>; 314094fd1316SSimon Glass }; 314194fd1316SSimon Glass 170 { 314294fd1316SSimon Glass name = "lcd"; 314394fd1316SSimon Glass accum = <33482>; 314494fd1316SSimon Glass }; 314594fd1316SSimon Glass }; 314694fd1316SSimon Glass 314794fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 314894fd1316SSimon Glass 31491372cce2SMarian BalakowiczLegacy uImage format: 31501372cce2SMarian Balakowicz 3151c609719bSwdenk Arg Where When 3152c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3153c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3154c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3155c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3156c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3157c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3158c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3159c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3160c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 31611372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3162c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3163c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3164c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3165c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 31661372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3167c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 31681372cce2SMarian Balakowicz 31691372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 31701372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 31711372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 31721372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 31731372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 31741372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 31751372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 317611ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 31771372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 31781372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 31791372cce2SMarian Balakowicz 3180ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3181c609719bSwdenk 3182a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 318363e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 318463e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 318563e73c9aSwdenk 3186566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3187566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3188566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3189566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3190566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3191566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3192566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3193566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3194566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3195566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3196566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3197566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3198566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3199566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3200566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3201566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3202566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3203566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3204566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3205566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3206566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3207566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3208566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3209566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3210566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3211566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3212566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3213566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3214566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3215566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3216566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3217566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3218566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3219566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3220566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3221566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3222566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3223566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3224566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3225566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3226566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3227566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3228566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3229566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3230566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3231566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3232566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3233c609719bSwdenk 3234566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3235c609719bSwdenk 3236566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3237566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3238566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3239206c60cbSwdenk 3240566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3241566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 324211ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3243566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3244566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3245566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 324674de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 324774de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3248566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3249c609719bSwdenk 32501372cce2SMarian BalakowiczFIT uImage format: 32511372cce2SMarian Balakowicz 32521372cce2SMarian Balakowicz Arg Where When 32531372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 32541372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 32551372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 32561372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 32571372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 32581372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3259f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 32601372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 32611372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 32621372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 32631372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 32641372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 326511ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 326611ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 32671372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 32681372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 32691372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 32701372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 32711372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 32721372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 32731372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 32741372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 32751372cce2SMarian Balakowicz 32761372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 32771372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 32781372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 327911ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 32801372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 32811372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 32821372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 32831372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 32841372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 32851372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 32861372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 32871372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 32881372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 32891372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 32901372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 32911372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 32921372cce2SMarian Balakowicz 329311ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 32941372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 32951372cce2SMarian Balakowicz 329611ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 32971372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 32981372cce2SMarian Balakowicz 329911ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 33001372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 33011372cce2SMarian Balakowicz 330221d29f7fSHeiko Schocher- legacy image format: 330321d29f7fSHeiko Schocher CONFIG_IMAGE_FORMAT_LEGACY 330421d29f7fSHeiko Schocher enables the legacy image format support in U-Boot. 330521d29f7fSHeiko Schocher 330621d29f7fSHeiko Schocher Default: 330721d29f7fSHeiko Schocher enabled if CONFIG_FIT_SIGNATURE is not defined. 330821d29f7fSHeiko Schocher 330921d29f7fSHeiko Schocher CONFIG_DISABLE_IMAGE_LEGACY 331021d29f7fSHeiko Schocher disable the legacy image format 331121d29f7fSHeiko Schocher 331221d29f7fSHeiko Schocher This define is introduced, as the legacy image format is 331321d29f7fSHeiko Schocher enabled per default for backward compatibility. 331421d29f7fSHeiko Schocher 3315d95f6ec7SGabe Black- FIT image support: 3316d95f6ec7SGabe Black CONFIG_FIT 3317d95f6ec7SGabe Black Enable support for the FIT uImage format. 3318d95f6ec7SGabe Black 3319d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3320d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3321d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3322d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3323d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3324d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3325d95f6ec7SGabe Black 33263e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 33273e569a6bSSimon Glass This option enables signature verification of FIT uImages, 33283e569a6bSSimon Glass using a hash signed and verified using RSA. See 33293e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 33303e569a6bSSimon Glass 333121d29f7fSHeiko Schocher WARNING: When relying on signed FIT images with required 333221d29f7fSHeiko Schocher signature check the legacy image format is default 333321d29f7fSHeiko Schocher disabled. If a board need legacy image format support 333421d29f7fSHeiko Schocher enable this through CONFIG_IMAGE_FORMAT_LEGACY 333521d29f7fSHeiko Schocher 33369a4f479bSDirk Eibach CONFIG_FIT_DISABLE_SHA256 33379a4f479bSDirk Eibach Supporting SHA256 hashes has quite an impact on binary size. 33389a4f479bSDirk Eibach For constrained systems sha256 hash support can be disabled 33399a4f479bSDirk Eibach with this option. 33409a4f479bSDirk Eibach 33414cf2609bSWolfgang Denk- Standalone program support: 33424cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 33434cf2609bSWolfgang Denk 33446feff899SWolfgang Denk This option defines a board specific value for the 33456feff899SWolfgang Denk address where standalone program gets loaded, thus 33466feff899SWolfgang Denk overwriting the architecture dependent default 33474cf2609bSWolfgang Denk settings. 33484cf2609bSWolfgang Denk 33494cf2609bSWolfgang Denk- Frame Buffer Address: 33504cf2609bSWolfgang Denk CONFIG_FB_ADDR 33514cf2609bSWolfgang Denk 33524cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 335344a53b57SWolfgang Denk address for frame buffer. This is typically the case 335444a53b57SWolfgang Denk when using a graphics controller has separate video 335544a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 335644a53b57SWolfgang Denk the given address instead of dynamically reserving it 335744a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 335844a53b57SWolfgang Denk the memory for the frame buffer depending on the 335944a53b57SWolfgang Denk configured panel size. 33604cf2609bSWolfgang Denk 33614cf2609bSWolfgang Denk Please see board_init_f function. 33624cf2609bSWolfgang Denk 3363cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3364cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3365cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3366cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3367cccfc2abSDetlev Zundel 3368cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3369cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3370cccfc2abSDetlev Zundel 3371cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3372cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3373cccfc2abSDetlev Zundel 3374cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3375cccfc2abSDetlev Zundel Needed for mtdparts command support. 3376cccfc2abSDetlev Zundel 3377cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3378cccfc2abSDetlev Zundel 3379cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3380cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3381cccfc2abSDetlev Zundel 3382ff94bc40SHeiko Schocher CONFIG_MTD_NAND_VERIFY_WRITE 3383ff94bc40SHeiko Schocher verify if the written data is correct reread. 3384ff94bc40SHeiko Schocher 338570c219cdSJoe Hershberger- UBI support 338670c219cdSJoe Hershberger CONFIG_CMD_UBI 338770c219cdSJoe Hershberger 338870c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 338970c219cdSJoe Hershberger with the UBI flash translation layer 339070c219cdSJoe Hershberger 339170c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 339270c219cdSJoe Hershberger 3393147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3394147162daSJoe Hershberger 3395147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3396147162daSJoe Hershberger warnings and errors enabled. 3397147162daSJoe Hershberger 3398ff94bc40SHeiko Schocher 3399ff94bc40SHeiko Schocher CONFIG_MTD_UBI_WL_THRESHOLD 3400ff94bc40SHeiko Schocher This parameter defines the maximum difference between the highest 3401ff94bc40SHeiko Schocher erase counter value and the lowest erase counter value of eraseblocks 3402ff94bc40SHeiko Schocher of UBI devices. When this threshold is exceeded, UBI starts performing 3403ff94bc40SHeiko Schocher wear leveling by means of moving data from eraseblock with low erase 3404ff94bc40SHeiko Schocher counter to eraseblocks with high erase counter. 3405ff94bc40SHeiko Schocher 3406ff94bc40SHeiko Schocher The default value should be OK for SLC NAND flashes, NOR flashes and 3407ff94bc40SHeiko Schocher other flashes which have eraseblock life-cycle 100000 or more. 3408ff94bc40SHeiko Schocher However, in case of MLC NAND flashes which typically have eraseblock 3409ff94bc40SHeiko Schocher life-cycle less than 10000, the threshold should be lessened (e.g., 3410ff94bc40SHeiko Schocher to 128 or 256, although it does not have to be power of 2). 3411ff94bc40SHeiko Schocher 3412ff94bc40SHeiko Schocher default: 4096 3413ff94bc40SHeiko Schocher 3414ff94bc40SHeiko Schocher CONFIG_MTD_UBI_BEB_LIMIT 3415ff94bc40SHeiko Schocher This option specifies the maximum bad physical eraseblocks UBI 3416ff94bc40SHeiko Schocher expects on the MTD device (per 1024 eraseblocks). If the 3417ff94bc40SHeiko Schocher underlying flash does not admit of bad eraseblocks (e.g. NOR 3418ff94bc40SHeiko Schocher flash), this value is ignored. 3419ff94bc40SHeiko Schocher 3420ff94bc40SHeiko Schocher NAND datasheets often specify the minimum and maximum NVM 3421ff94bc40SHeiko Schocher (Number of Valid Blocks) for the flashes' endurance lifetime. 3422ff94bc40SHeiko Schocher The maximum expected bad eraseblocks per 1024 eraseblocks 3423ff94bc40SHeiko Schocher then can be calculated as "1024 * (1 - MinNVB / MaxNVB)", 3424ff94bc40SHeiko Schocher which gives 20 for most NANDs (MaxNVB is basically the total 3425ff94bc40SHeiko Schocher count of eraseblocks on the chip). 3426ff94bc40SHeiko Schocher 3427ff94bc40SHeiko Schocher To put it differently, if this value is 20, UBI will try to 3428ff94bc40SHeiko Schocher reserve about 1.9% of physical eraseblocks for bad blocks 3429ff94bc40SHeiko Schocher handling. And that will be 1.9% of eraseblocks on the entire 3430ff94bc40SHeiko Schocher NAND chip, not just the MTD partition UBI attaches. This means 3431ff94bc40SHeiko Schocher that if you have, say, a NAND flash chip admits maximum 40 bad 3432ff94bc40SHeiko Schocher eraseblocks, and it is split on two MTD partitions of the same 3433ff94bc40SHeiko Schocher size, UBI will reserve 40 eraseblocks when attaching a 3434ff94bc40SHeiko Schocher partition. 3435ff94bc40SHeiko Schocher 3436ff94bc40SHeiko Schocher default: 20 3437ff94bc40SHeiko Schocher 3438ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP 3439ff94bc40SHeiko Schocher Fastmap is a mechanism which allows attaching an UBI device 3440ff94bc40SHeiko Schocher in nearly constant time. Instead of scanning the whole MTD device it 3441ff94bc40SHeiko Schocher only has to locate a checkpoint (called fastmap) on the device. 3442ff94bc40SHeiko Schocher The on-flash fastmap contains all information needed to attach 3443ff94bc40SHeiko Schocher the device. Using fastmap makes only sense on large devices where 3444ff94bc40SHeiko Schocher attaching by scanning takes long. UBI will not automatically install 3445ff94bc40SHeiko Schocher a fastmap on old images, but you can set the UBI parameter 3446ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT to 1 if you want so. Please note 3447ff94bc40SHeiko Schocher that fastmap-enabled images are still usable with UBI implementations 3448ff94bc40SHeiko Schocher without fastmap support. On typical flash devices the whole fastmap 3449ff94bc40SHeiko Schocher fits into one PEB. UBI will reserve PEBs to hold two fastmaps. 3450ff94bc40SHeiko Schocher 3451ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 3452ff94bc40SHeiko Schocher Set this parameter to enable fastmap automatically on images 3453ff94bc40SHeiko Schocher without a fastmap. 3454ff94bc40SHeiko Schocher default: 0 3455ff94bc40SHeiko Schocher 345670c219cdSJoe Hershberger- UBIFS support 345770c219cdSJoe Hershberger CONFIG_CMD_UBIFS 345870c219cdSJoe Hershberger 345970c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 346070c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 346170c219cdSJoe Hershberger 346270c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 346370c219cdSJoe Hershberger 3464147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3465147162daSJoe Hershberger 3466147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3467147162daSJoe Hershberger warnings and errors enabled. 3468147162daSJoe Hershberger 34696a11cf48SDaniel Schwierzeck- SPL framework 34706a11cf48SDaniel Schwierzeck CONFIG_SPL 34716a11cf48SDaniel Schwierzeck Enable building of SPL globally. 34726a11cf48SDaniel Schwierzeck 347395579793STom Rini CONFIG_SPL_LDSCRIPT 347495579793STom Rini LDSCRIPT for linking the SPL binary. 347595579793STom Rini 34766ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 34776ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 34786ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 34796ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 34808960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 34816ebc3461SAlbert ARIBAUD must not be both defined at the same time. 34826ebc3461SAlbert ARIBAUD 348395579793STom Rini CONFIG_SPL_MAX_SIZE 34846ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 34856ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 34866ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 34876ebc3461SAlbert ARIBAUD not exceed it. 348895579793STom Rini 34896a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 34906a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 34916a11cf48SDaniel Schwierzeck 349294a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 349394a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 349494a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 349594a45bb1SScott Wood 349695579793STom Rini CONFIG_SPL_BSS_START_ADDR 349795579793STom Rini Link address for the BSS within the SPL binary. 349895579793STom Rini 349995579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 35006ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 35016ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 35026ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 35038960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 35046ebc3461SAlbert ARIBAUD must not be both defined at the same time. 350595579793STom Rini 350695579793STom Rini CONFIG_SPL_STACK 350795579793STom Rini Adress of the start of the stack SPL will use 350895579793STom Rini 350994a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 351094a45bb1SScott Wood Adress of the start of the stack SPL will use after 351194a45bb1SScott Wood relocation. If unspecified, this is equal to 351294a45bb1SScott Wood CONFIG_SPL_STACK. 351394a45bb1SScott Wood 351495579793STom Rini CONFIG_SYS_SPL_MALLOC_START 351595579793STom Rini Starting address of the malloc pool used in SPL. 351695579793STom Rini 351795579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 351895579793STom Rini The size of the malloc pool used in SPL. 35196a11cf48SDaniel Schwierzeck 352047f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 352147f7bcaeSTom Rini Enable the SPL framework under common/. This framework 352247f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 352347f7bcaeSTom Rini NAND loading of the Linux Kernel. 352447f7bcaeSTom Rini 35259607faf2STom Rini CONFIG_SPL_OS_BOOT 35269607faf2STom Rini Enable booting directly to an OS from SPL. 35279607faf2STom Rini See also: doc/README.falcon 35289607faf2STom Rini 3529861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3530861a86f4STom Rini For ARM, enable an optional function to print more information 3531861a86f4STom Rini about the running system. 3532861a86f4STom Rini 35334b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 35344b919725SScott Wood Arch init code should be built for a very small image 35354b919725SScott Wood 35366a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 35376a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 35386a11cf48SDaniel Schwierzeck 35396a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 35406a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 35416a11cf48SDaniel Schwierzeck 35426a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 35436a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 35446a11cf48SDaniel Schwierzeck 35456a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 35466a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 35476a11cf48SDaniel Schwierzeck 35486a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 35496a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 35506a11cf48SDaniel Schwierzeck 355195579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 355295579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 355395579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 355495579793STom Rini Address, size and partition on the MMC to load U-Boot from 355595579793STom Rini when the MMC is being used in raw mode. 355695579793STom Rini 35572b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 35582b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 35592b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 35602b75b0adSPeter Korsgaard 35612b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 35622b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 35632b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 35642b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 35652b75b0adSPeter Korsgaard (for falcon mode) 35662b75b0adSPeter Korsgaard 356795579793STom Rini CONFIG_SPL_FAT_SUPPORT 356895579793STom Rini Support for fs/fat/libfat.o in SPL binary 356995579793STom Rini 357095579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 357195579793STom Rini Filename to read to load U-Boot when reading from FAT 357295579793STom Rini 35737ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 35747ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 35757ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 35767ad2cc79SPeter Korsgaard 35777ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 35787ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 35797ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 35807ad2cc79SPeter Korsgaard 358106f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 358206f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 358306f60ae3SScott Wood start.S waits for the rest of the SPL to load before 358406f60ae3SScott Wood continuing (the hardware starts execution after just 358506f60ae3SScott Wood loading the first page rather than the full 4K). 358606f60ae3SScott Wood 3587651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3588651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3589651fcf60SPrabhakar Kushwaha 35906f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 35916f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 35926f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 35936f2f01b9SScott Wood 35946f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 35956f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 35966f2f01b9SScott Wood 35976f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 35986f2f01b9SScott Wood Include standard software ECC in the SPL 35996f2f01b9SScott Wood 360095579793STom Rini CONFIG_SPL_NAND_SIMPLE 36017d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 36027d4b7955SScott Wood expose the cmd_ctrl() interface. 360395579793STom Rini 36046dd3b566STom Rini CONFIG_SPL_MTD_SUPPORT 36056dd3b566STom Rini Support for the MTD subsystem within SPL. Useful for 36066dd3b566STom Rini environment on NAND support within SPL. 36076dd3b566STom Rini 3608bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3609bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 36105614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3611bb0dc108SYing Zhang 36127c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 36137c8eea59SYing Zhang Set for common ddr init with serial presence detect in 36147c8eea59SYing Zhang SPL binary. 36157c8eea59SYing Zhang 361695579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 361795579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 361895579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 361995579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 362095579793STom Rini CONFIG_SYS_NAND_ECCBYTES 362195579793STom Rini Defines the size and behavior of the NAND that SPL uses 36227d4b7955SScott Wood to read U-Boot 362395579793STom Rini 3624fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3625fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3626fbe76ae4SPrabhakar Kushwaha 362795579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 36287d4b7955SScott Wood Location in NAND to read U-Boot from 36297d4b7955SScott Wood 36307d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 36317d4b7955SScott Wood Location in memory to load U-Boot to 36327d4b7955SScott Wood 36337d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 36347d4b7955SScott Wood Size of image to load 363595579793STom Rini 363695579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 36377d4b7955SScott Wood Entry point in loaded image to jump to 363895579793STom Rini 363995579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 364095579793STom Rini Define this if you need to first read the OOB and then the 364195579793STom Rini data. This is used for example on davinci plattforms. 364295579793STom Rini 364395579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 364495579793STom Rini Support for an OMAP3-specific set of functions to return the 364595579793STom Rini ID and MFR of the first attached NAND chip, if present. 364695579793STom Rini 36476a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 36486a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 36496a11cf48SDaniel Schwierzeck 36506a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 36516a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 36526a11cf48SDaniel Schwierzeck 36536a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 36546a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 36556a11cf48SDaniel Schwierzeck 3656c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3657c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3658c57b953dSPavel Machek 36596a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 36606a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 36611372cce2SMarian Balakowicz 3662ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3663ba1bee43SYing Zhang Support for the environment operating in SPL binary 3664ba1bee43SYing Zhang 3665ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3666ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3667ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3668ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3669ba1bee43SYing Zhang 367074752baaSScott Wood CONFIG_SPL_PAD_TO 36716113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 36726113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 36736113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36746113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36756113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 367674752baaSScott Wood 3677ca2fca22SScott Wood CONFIG_SPL_TARGET 3678ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3679ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3680ca2fca22SScott Wood example if more than one image needs to be produced. 3681ca2fca22SScott Wood 368287ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 368387ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 368487ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 368587ebee39SSimon Glass option to re-enable it. This will affect the output of the 368687ebee39SSimon Glass bootm command when booting a FIT image. 368787ebee39SSimon Glass 36883aa29de0SYing Zhang- TPL framework 36893aa29de0SYing Zhang CONFIG_TPL 36903aa29de0SYing Zhang Enable building of TPL globally. 36913aa29de0SYing Zhang 36923aa29de0SYing Zhang CONFIG_TPL_PAD_TO 36933aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 36943aa29de0SYing Zhang the TPL payload. By default, this is defined as 36953aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36963aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36973aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 36983aa29de0SYing Zhang 3699c609719bSwdenkModem Support: 3700c609719bSwdenk-------------- 3701c609719bSwdenk 3702566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3703c609719bSwdenk 370411ccc33fSMarcel Ziswiler- Modem support enable: 3705c609719bSwdenk CONFIG_MODEM_SUPPORT 3706c609719bSwdenk 3707c609719bSwdenk- RTS/CTS Flow control enable: 3708c609719bSwdenk CONFIG_HWFLOW 3709c609719bSwdenk 3710c609719bSwdenk- Modem debug support: 3711c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3712c609719bSwdenk 3713c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3714c609719bSwdenk for modem support. Useful only with BDI2000. 3715c609719bSwdenk 3716a8c7c708Swdenk- Interrupt support (PPC): 3717a8c7c708Swdenk 3718a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3719a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 372011ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3721a8c7c708Swdenk should set decrementer_count to appropriate value. If 372211ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3723a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 372411ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3725a8c7c708Swdenk specific handling. If board has watchdog / status_led 3726a8c7c708Swdenk / other_activity_monitor it works automatically from 3727a8c7c708Swdenk general timer_interrupt(). 3728a8c7c708Swdenk 3729c609719bSwdenk- General: 3730c609719bSwdenk 3731c609719bSwdenk In the target system modem support is enabled when a 3732c609719bSwdenk specific key (key combination) is pressed during 3733c609719bSwdenk power-on. Otherwise U-Boot will boot normally 373411ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3735c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3736c609719bSwdenk function, returning 1 and thus enabling modem 3737c609719bSwdenk initialization. 3738c609719bSwdenk 3739c609719bSwdenk If there are no modem init strings in the 3740c609719bSwdenk environment, U-Boot proceed to autoboot; the 3741c609719bSwdenk previous output (banner, info printfs) will be 374211ccc33fSMarcel Ziswiler suppressed, though. 3743c609719bSwdenk 3744c609719bSwdenk See also: doc/README.Modem 3745c609719bSwdenk 37469660e442SHelmut RaigerBoard initialization settings: 37479660e442SHelmut Raiger------------------------------ 37489660e442SHelmut Raiger 37499660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 37509660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 37519660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 37529660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 37539660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 37549660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 37559660e442SHelmut Raiger 37569660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 37579660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 37589660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 37599660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3760c609719bSwdenk 3761c609719bSwdenkConfiguration Settings: 3762c609719bSwdenk----------------------- 3763c609719bSwdenk 37644d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 37654d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 37664d1fd7f1SYork Sun 37676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3768c609719bSwdenk undefine this when you're short of memory. 3769c609719bSwdenk 37702fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 37712fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 37722fb2604dSPeter Tyser 37736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3774c609719bSwdenk prompt for user input. 3775c609719bSwdenk 37766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3777c609719bSwdenk 37786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3779c609719bSwdenk 37806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3781c609719bSwdenk 37826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3783c609719bSwdenk the application (usually a Linux kernel) when it is 3784c609719bSwdenk booted 3785c609719bSwdenk 37866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3787c609719bSwdenk List of legal baudrate settings for this board. 3788c609719bSwdenk 37896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3790c609719bSwdenk Suppress display of console information at boot. 3791c609719bSwdenk 37926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3793c609719bSwdenk If the board specific function 3794c609719bSwdenk extern int overwrite_console (void); 3795c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3796c609719bSwdenk serial port, else the settings in the environment are used. 3797c609719bSwdenk 37986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3799c609719bSwdenk Enable the call to overwrite_console(). 3800c609719bSwdenk 38016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3802c609719bSwdenk Enable overwrite of previous console environment settings. 3803c609719bSwdenk 38046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3805c609719bSwdenk Begin and End addresses of the area used by the 3806c609719bSwdenk simple memory test. 3807c609719bSwdenk 38086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3809c609719bSwdenk Enable an alternate, more extensive memory test. 3810c609719bSwdenk 38116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 38125f535fe1Swdenk Scratch address used by the alternate memory test 38135f535fe1Swdenk You only need to set this if address zero isn't writeable 38145f535fe1Swdenk 38156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 38166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 381714f73ca6SStefan Roese this specified memory area will get subtracted from the top 381811ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 381914f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 382014f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 382114f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 38225e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 382314f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 38245e12e75dSStefan Roese will have to get fixed in Linux additionally. 382514f73ca6SStefan Roese 382614f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 382714f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 382814f73ca6SStefan Roese be touched. 382914f73ca6SStefan Roese 383014f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 383114f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 383214f73ca6SStefan Roese then the end address of the Linux memory will be located at a 383314f73ca6SStefan Roese non page size aligned address and this could cause major 383414f73ca6SStefan Roese problems. 383514f73ca6SStefan Roese 38366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3837c609719bSwdenk Enable temporary baudrate change while serial download 3838c609719bSwdenk 38396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3840c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3841c609719bSwdenk 38426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3843c609719bSwdenk Physical start address of Motherboard I/O (if using a 3844c609719bSwdenk Cogent motherboard) 3845c609719bSwdenk 38466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3847c609719bSwdenk Physical start address of Flash memory. 3848c609719bSwdenk 38496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3850c609719bSwdenk Physical start address of boot monitor code (set by 3851c609719bSwdenk make config files to be same as the text base address 385214d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 38536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3854c609719bSwdenk 38556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 38563b57fe0aSwdenk Size of memory reserved for monitor code, used to 38573b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 38583b57fe0aSwdenk embedded within the U-Boot image, or in a separate 38593b57fe0aSwdenk flash sector. 3860c609719bSwdenk 38616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3862c609719bSwdenk Size of DRAM reserved for malloc() use. 3863c609719bSwdenk 3864d59476b6SSimon Glass- CONFIG_SYS_MALLOC_F_LEN 3865d59476b6SSimon Glass Size of the malloc() pool for use before relocation. If 3866d59476b6SSimon Glass this is defined, then a very simple malloc() implementation 3867d59476b6SSimon Glass will become available before relocation. The address is just 3868d59476b6SSimon Glass below the global data, and the stack is moved down to make 3869d59476b6SSimon Glass space. 3870d59476b6SSimon Glass 3871d59476b6SSimon Glass This feature allocates regions with increasing addresses 3872d59476b6SSimon Glass within the region. calloc() is supported, but realloc() 3873d59476b6SSimon Glass is not available. free() is supported but does nothing. 3874d59476b6SSimon Glass The memory will be freed (or in fact just forgotton) when 3875d59476b6SSimon Glass U-Boot relocates itself. 3876d59476b6SSimon Glass 3877e7b14e9aSSimon Glass Pre-relocation malloc() is only supported on ARM and sandbox 387829afe9e6SSimon Glass at present but is fairly easy to enable for other archs. 387929afe9e6SSimon Glass 38806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 388115940c9aSStefan Roese Normally compressed uImages are limited to an 388215940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 38836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 388415940c9aSStefan Roese to adjust this setting to your needs. 3885c609719bSwdenk 38866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3887c609719bSwdenk Maximum size of memory mapped by the startup code of 3888c609719bSwdenk the Linux kernel; all data that must be processed by 38897d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 38907d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 38911bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 38927d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3893c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3894c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3895c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3896c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3897c609719bSwdenk 3898fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3899fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3900fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3901fca43cc8SJohn Rigby is enabled. 3902fca43cc8SJohn Rigby 3903fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3904fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3905fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3906fca43cc8SJohn Rigby 3907fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3908fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3909fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3910fca43cc8SJohn Rigby 39116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3912c609719bSwdenk Max number of Flash memory banks 3913c609719bSwdenk 39146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3915c609719bSwdenk Max number of sectors on a Flash chip 3916c609719bSwdenk 39176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3918c609719bSwdenk Timeout for Flash erase operations (in ms) 3919c609719bSwdenk 39206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3921c609719bSwdenk Timeout for Flash write operations (in ms) 3922c609719bSwdenk 39236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 39248564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 39258564acf9Swdenk 39266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 39278564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 39288564acf9Swdenk 39296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 39308564acf9Swdenk If defined, hardware flash sectors protection is used 39318564acf9Swdenk instead of U-Boot software protection. 39328564acf9Swdenk 39336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3934c609719bSwdenk 3935c609719bSwdenk Enable TFTP transfers directly to flash memory; 3936c609719bSwdenk without this option such a download has to be 3937c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3938c609719bSwdenk copy from RAM to flash. 3939c609719bSwdenk 3940c609719bSwdenk The two-step approach is usually more reliable, since 3941c609719bSwdenk you can check if the download worked before you erase 394211ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 394311ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3944c609719bSwdenk downloaded image) this option may be very useful. 3945c609719bSwdenk 39466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3947c609719bSwdenk Define if the flash driver uses extra elements in the 39485653fc33Swdenk common flash structure for storing flash geometry. 39495653fc33Swdenk 395000b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 39515653fc33Swdenk This option also enables the building of the cfi_flash driver 39525653fc33Swdenk in the drivers directory 395353cf9435Sstroese 395491809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 395591809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 395691809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 395791809ed5SPiotr Ziecik to the MTD layer. 395891809ed5SPiotr Ziecik 39596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 396096ef831fSGuennadi Liakhovetski Use buffered writes to flash. 396196ef831fSGuennadi Liakhovetski 396296ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 396396ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 396496ef831fSGuennadi Liakhovetski write commands. 396596ef831fSGuennadi Liakhovetski 39666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 39675568e613SStefan Roese If this option is defined, the common CFI flash doesn't 39685568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 39695568e613SStefan Roese is useful, if some of the configured banks are only 39705568e613SStefan Roese optionally available. 39715568e613SStefan Roese 39729a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 39739a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 39749a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 39759a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 39769a042e9cSJerry Van Baren 3977352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3978352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3979352ef3f1SStefan Roese against the source after the write operation. An error message 3980352ef3f1SStefan Roese will be printed when the contents are not identical. 3981352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3982352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3983352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3984352ef3f1SStefan Roese this option if you really know what you are doing. 3985352ef3f1SStefan Roese 39866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 398711ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 398811ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 398953cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 399053cf9435Sstroese buffers can be full shortly after enabling the interface 399111ccc33fSMarcel Ziswiler on high Ethernet traffic. 399253cf9435Sstroese Defaults to 4 if not defined. 3993c609719bSwdenk 3994ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3995ea882bafSWolfgang Denk 3996ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3997ea882bafSWolfgang Denk internally to store the environment settings. The default 3998ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3999ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 4000ea882bafSWolfgang Denk lib/hashtable.c for details. 4001ea882bafSWolfgang Denk 40022598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 40032598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 40041bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 40052598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 40062598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 40072598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 40082598090bSJoe Hershberger 40092598090bSJoe Hershberger The format of the list is: 40102598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 4011267541f7SJoe Hershberger access_atribute = [a|r|o|c] 4012267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 40132598090bSJoe Hershberger entry = variable_name[:attributes] 40142598090bSJoe Hershberger list = entry[,list] 40152598090bSJoe Hershberger 40162598090bSJoe Hershberger The type attributes are: 40172598090bSJoe Hershberger s - String (default) 40182598090bSJoe Hershberger d - Decimal 40192598090bSJoe Hershberger x - Hexadecimal 40202598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 40212598090bSJoe Hershberger i - IP address 40222598090bSJoe Hershberger m - MAC address 40232598090bSJoe Hershberger 4024267541f7SJoe Hershberger The access attributes are: 4025267541f7SJoe Hershberger a - Any (default) 4026267541f7SJoe Hershberger r - Read-only 4027267541f7SJoe Hershberger o - Write-once 4028267541f7SJoe Hershberger c - Change-default 4029267541f7SJoe Hershberger 40302598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 40312598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 40322598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 40332598090bSJoe Hershberger 40342598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 40352598090bSJoe Hershberger Define this to a list (string) to define validation that 40362598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 40372598090bSJoe Hershberger environment variable. To override a setting in the static 40382598090bSJoe Hershberger list, simply add an entry for the same variable name to the 40392598090bSJoe Hershberger ".flags" variable. 40402598090bSJoe Hershberger 4041267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 4042267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 4043267541f7SJoe Hershberger access flags. 4044267541f7SJoe Hershberger 40455c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 40465c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 40475c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 40485c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 40495c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 40505c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 40515c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 40525c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 40535c1a7ea6SSimon Glass your board please report the problem and send patches! 40545c1a7ea6SSimon Glass 40550b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 40560b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 40570b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 40580b1b60c7SLokesh Vutla the value can be calulated on a given board. 4059632efa74SSimon Glass 4060c609719bSwdenkThe following definitions that deal with the placement and management 4061c609719bSwdenkof environment data (variable area); in general, we support the 4062c609719bSwdenkfollowing configurations: 4063c609719bSwdenk 4064c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 4065c3eb3fe4SMike Frysinger 4066c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 4067c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 4068c3eb3fe4SMike Frysinger 40695a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 4070c609719bSwdenk 4071c609719bSwdenk Define this if the environment is in flash memory. 4072c609719bSwdenk 4073c609719bSwdenk a) The environment occupies one whole flash sector, which is 4074c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 4075c609719bSwdenk happens usually with "bottom boot sector" or "top boot 4076c609719bSwdenk sector" type flash chips, which have several smaller 4077c609719bSwdenk sectors at the start or the end. For instance, such a 4078c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 4079c609719bSwdenk such a case you would place the environment in one of the 4080c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 4081c609719bSwdenk "top boot sector" type flash chips, you would put the 4082c609719bSwdenk environment in one of the last sectors, leaving a gap 4083c609719bSwdenk between U-Boot and the environment. 4084c609719bSwdenk 40850e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 4086c609719bSwdenk 4087c609719bSwdenk Offset of environment data (variable area) to the 4088c609719bSwdenk beginning of flash memory; for instance, with bottom boot 4089c609719bSwdenk type flash chips the second sector can be used: the offset 4090c609719bSwdenk for this sector is given here. 4091c609719bSwdenk 40926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 4093c609719bSwdenk 40940e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 4095c609719bSwdenk 4096c609719bSwdenk This is just another way to specify the start address of 4097c609719bSwdenk the flash sector containing the environment (instead of 40980e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 4099c609719bSwdenk 41000e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 4101c609719bSwdenk 4102c609719bSwdenk Size of the sector containing the environment. 4103c609719bSwdenk 4104c609719bSwdenk 4105c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 4106c609719bSwdenk In such a case you don't want to spend a whole sector for 4107c609719bSwdenk the environment. 4108c609719bSwdenk 41090e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4110c609719bSwdenk 41115a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 41120e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 4113c609719bSwdenk of this flash sector for the environment. This saves 4114c609719bSwdenk memory for the RAM copy of the environment. 4115c609719bSwdenk 4116c609719bSwdenk It may also save flash memory if you decide to use this 4117c609719bSwdenk when your environment is "embedded" within U-Boot code, 4118c609719bSwdenk since then the remainder of the flash sector could be used 4119c609719bSwdenk for U-Boot code. It should be pointed out that this is 4120c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 4121c609719bSwdenk updating the environment in flash makes it always 4122c609719bSwdenk necessary to erase the WHOLE sector. If something goes 4123c609719bSwdenk wrong before the contents has been restored from a copy in 4124c609719bSwdenk RAM, your target system will be dead. 4125c609719bSwdenk 41260e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 41270e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 4128c609719bSwdenk 4129c609719bSwdenk These settings describe a second storage area used to hold 413011ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 41313e38691eSwdenk a valid backup copy in case there is a power failure during 4132c609719bSwdenk a "saveenv" operation. 4133c609719bSwdenk 4134c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 4135c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 4136c609719bSwdenkaccordingly! 4137c609719bSwdenk 4138c609719bSwdenk 41399314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 4140c609719bSwdenk 4141c609719bSwdenk Define this if you have some non-volatile memory device 4142c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 4143c609719bSwdenk environment. 4144c609719bSwdenk 41450e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 41460e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4147c609719bSwdenk 414811ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 4149c609719bSwdenk want to use for environment. It is assumed that this memory 4150c609719bSwdenk can just be read and written to, without any special 4151c609719bSwdenk provision. 4152c609719bSwdenk 4153c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 4154c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 415511ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 4156c609719bSwdenkU-Boot will hang. 4157c609719bSwdenk 4158c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 4159c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 4160c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 4161c609719bSwdenkto save the current settings. 4162c609719bSwdenk 4163c609719bSwdenk 4164bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 4165c609719bSwdenk 4166c609719bSwdenk Use this if you have an EEPROM or similar serial access 4167c609719bSwdenk device and a driver for it. 4168c609719bSwdenk 41690e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 41700e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4171c609719bSwdenk 4172c609719bSwdenk These two #defines specify the offset and size of the 4173c609719bSwdenk environment area within the total memory of your EEPROM. 4174c609719bSwdenk 41756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 4176c609719bSwdenk If defined, specified the chip address of the EEPROM device. 4177c609719bSwdenk The default address is zero. 4178c609719bSwdenk 41796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 4180c609719bSwdenk If defined, the number of bits used to address bytes in a 4181c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 4182c609719bSwdenk would require six bits. 4183c609719bSwdenk 41846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 4185c609719bSwdenk If defined, the number of milliseconds to delay between 4186c609719bSwdenk page writes. The default is zero milliseconds. 4187c609719bSwdenk 41886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 4189c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 4190c609719bSwdenk that this is NOT the chip address length! 4191c609719bSwdenk 41926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 41935cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 41945cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 41955cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 41965cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 41975cf91d6bSwdenk byte chips. 41985cf91d6bSwdenk 41995cf91d6bSwdenk Note that we consider the length of the address field to 42005cf91d6bSwdenk still be one byte because the extra address bits are hidden 42015cf91d6bSwdenk in the chip address. 42025cf91d6bSwdenk 42036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 4204c609719bSwdenk The size in bytes of the EEPROM device. 4205c609719bSwdenk 4206548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 4207548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 4208548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 4209548738b4SHeiko Schocher 4210548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 4211548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 4212548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 4213548738b4SHeiko Schocher EEPROM. For example: 4214548738b4SHeiko Schocher 4215ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 4216548738b4SHeiko Schocher 4217548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 4218548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 4219c609719bSwdenk 4220057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 42215779d8d9Swdenk 42225779d8d9Swdenk Define this if you have a DataFlash memory device which you 42235779d8d9Swdenk want to use for the environment. 42245779d8d9Swdenk 42250e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 42260e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 42270e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 42285779d8d9Swdenk 42295779d8d9Swdenk These three #defines specify the offset and size of the 42305779d8d9Swdenk environment area within the total memory of your DataFlash placed 42315779d8d9Swdenk at the specified address. 42325779d8d9Swdenk 4233bd83b592SWu, Josh- CONFIG_ENV_IS_IN_SPI_FLASH: 4234bd83b592SWu, Josh 4235bd83b592SWu, Josh Define this if you have a SPI Flash memory device which you 4236bd83b592SWu, Josh want to use for the environment. 4237bd83b592SWu, Josh 4238bd83b592SWu, Josh - CONFIG_ENV_OFFSET: 4239bd83b592SWu, Josh - CONFIG_ENV_SIZE: 4240bd83b592SWu, Josh 4241bd83b592SWu, Josh These two #defines specify the offset and size of the 4242bd83b592SWu, Josh environment area within the SPI Flash. CONFIG_ENV_OFFSET must be 4243bd83b592SWu, Josh aligned to an erase sector boundary. 4244bd83b592SWu, Josh 4245bd83b592SWu, Josh - CONFIG_ENV_SECT_SIZE: 4246bd83b592SWu, Josh 4247bd83b592SWu, Josh Define the SPI flash's sector size. 4248bd83b592SWu, Josh 4249bd83b592SWu, Josh - CONFIG_ENV_OFFSET_REDUND (optional): 4250bd83b592SWu, Josh 4251bd83b592SWu, Josh This setting describes a second storage area of CONFIG_ENV_SIZE 4252bd83b592SWu, Josh size used to hold a redundant copy of the environment data, so 4253bd83b592SWu, Josh that there is a valid backup copy in case there is a power failure 4254bd83b592SWu, Josh during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4255bd83b592SWu, Josh aligned to an erase sector boundary. 4256bd83b592SWu, Josh 4257bd83b592SWu, Josh - CONFIG_ENV_SPI_BUS (optional): 4258bd83b592SWu, Josh - CONFIG_ENV_SPI_CS (optional): 4259bd83b592SWu, Josh 4260bd83b592SWu, Josh Define the SPI bus and chip select. If not defined they will be 0. 4261bd83b592SWu, Josh 4262bd83b592SWu, Josh - CONFIG_ENV_SPI_MAX_HZ (optional): 4263bd83b592SWu, Josh 4264bd83b592SWu, Josh Define the SPI max work clock. If not defined then use 1MHz. 4265bd83b592SWu, Josh 4266bd83b592SWu, Josh - CONFIG_ENV_SPI_MODE (optional): 4267bd83b592SWu, Josh 4268bd83b592SWu, Josh Define the SPI work mode. If not defined then use SPI_MODE_3. 4269bd83b592SWu, Josh 42700a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 42710a85a9e7SLiu Gang 42720a85a9e7SLiu Gang Define this if you have a remote memory space which you 42730a85a9e7SLiu Gang want to use for the local device's environment. 42740a85a9e7SLiu Gang 42750a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 42760a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 42770a85a9e7SLiu Gang 42780a85a9e7SLiu Gang These two #defines specify the address and size of the 42790a85a9e7SLiu Gang environment area within the remote memory space. The 42800a85a9e7SLiu Gang local device can get the environment from remote memory 4281fc54c7faSLiu Gang space by SRIO or PCIE links. 42820a85a9e7SLiu Gang 42830a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 42840a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 4285fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4286fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 42870a85a9e7SLiu Gang 428851bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 428913a5695bSwdenk 429013a5695bSwdenk Define this if you have a NAND device which you want to use 429113a5695bSwdenk for the environment. 429213a5695bSwdenk 42930e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 42940e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 429513a5695bSwdenk 429613a5695bSwdenk These two #defines specify the offset and size of the environment 4297fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4298fdd813deSScott Wood aligned to an erase block boundary. 42995779d8d9Swdenk 4300fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4301e443c944SMarkus Klotzbuecher 43020e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4303fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4304fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4305fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4306fdd813deSScott Wood aligned to an erase block boundary. 4307e443c944SMarkus Klotzbuecher 4308fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4309fdd813deSScott Wood 4310fdd813deSScott Wood Specifies the length of the region in which the environment 4311fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4312fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4313fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4314fdd813deSScott Wood the range to be avoided. 4315fdd813deSScott Wood 4316fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4317fdd813deSScott Wood 4318fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4319fdd813deSScott Wood environment from block zero's out-of-band data. The 4320fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4321fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4322fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4323e443c944SMarkus Klotzbuecher 4324b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4325b74ab737SGuennadi Liakhovetski 4326b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4327b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4328b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4329b74ab737SGuennadi Liakhovetski 43302b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 43312b74433fSJoe Hershberger 43322b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 43332b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 43342b74433fSJoe Hershberger accesses, which is important on NAND. 43352b74433fSJoe Hershberger 43362b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 43372b74433fSJoe Hershberger 43382b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 43392b74433fSJoe Hershberger 43402b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 43412b74433fSJoe Hershberger 43422b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 43432b74433fSJoe Hershberger environment in. 43442b74433fSJoe Hershberger 4345785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4346785881f7SJoe Hershberger 4347785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4348785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4349785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4350785881f7SJoe Hershberger 43512b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 43522b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 43532b74433fSJoe Hershberger 43542b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 43552b74433fSJoe Hershberger when storing the env in UBI. 43562b74433fSJoe Hershberger 4357d1db76f1SWu, Josh- CONFIG_ENV_IS_IN_FAT: 4358d1db76f1SWu, Josh Define this if you want to use the FAT file system for the environment. 4359d1db76f1SWu, Josh 4360d1db76f1SWu, Josh - FAT_ENV_INTERFACE: 4361d1db76f1SWu, Josh 4362d1db76f1SWu, Josh Define this to a string that is the name of the block device. 4363d1db76f1SWu, Josh 4364d1db76f1SWu, Josh - FAT_ENV_DEV_AND_PART: 4365d1db76f1SWu, Josh 4366d1db76f1SWu, Josh Define this to a string to specify the partition of the device. It can 4367d1db76f1SWu, Josh be as following: 4368d1db76f1SWu, Josh 4369d1db76f1SWu, Josh "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1) 4370d1db76f1SWu, Josh - "D:P": device D partition P. Error occurs if device D has no 4371d1db76f1SWu, Josh partition table. 4372d1db76f1SWu, Josh - "D:0": device D. 4373d1db76f1SWu, Josh - "D" or "D:": device D partition 1 if device D has partition 4374d1db76f1SWu, Josh table, or the whole device D if has no partition 4375d1db76f1SWu, Josh table. 4376d1db76f1SWu, Josh - "D:auto": first partition in device D with bootable flag set. 4377d1db76f1SWu, Josh If none, first valid paratition in device D. If no 4378d1db76f1SWu, Josh partition table then means device D. 4379d1db76f1SWu, Josh 4380d1db76f1SWu, Josh - FAT_ENV_FILE: 4381d1db76f1SWu, Josh 4382d1db76f1SWu, Josh It's a string of the FAT file name. This file use to store the 4383d1db76f1SWu, Josh envrionment. 4384d1db76f1SWu, Josh 4385d1db76f1SWu, Josh - CONFIG_FAT_WRITE: 4386d1db76f1SWu, Josh This should be defined. Otherwise it cannot save the envrionment file. 4387d1db76f1SWu, Josh 438806e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 438906e4ae5fSStephen Warren 439006e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 439106e4ae5fSStephen Warren environment. 439206e4ae5fSStephen Warren 439306e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 439406e4ae5fSStephen Warren 439506e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 439606e4ae5fSStephen Warren 439706e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 439806e4ae5fSStephen Warren 439906e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 440006e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 440106e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 440206e4ae5fSStephen Warren 440306e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 440406e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 440506e4ae5fSStephen Warren 440606e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 440706e4ae5fSStephen Warren area within the specified MMC device. 440806e4ae5fSStephen Warren 44095c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 44105c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 44115c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 44125c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 44135c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 44145c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 44155c088ee8SStephen Warren maximum possible space before it, to store other data. 44165c088ee8SStephen Warren 441706e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 441806e4ae5fSStephen Warren MMC sector boundary. 441906e4ae5fSStephen Warren 442006e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 442106e4ae5fSStephen Warren 442206e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 442306e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 442406e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 442506e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 442606e4ae5fSStephen Warren 44275c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 44285c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 44295c088ee8SStephen Warren 443006e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 443106e4ae5fSStephen Warren an MMC sector boundary. 443206e4ae5fSStephen Warren 443306e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 443406e4ae5fSStephen Warren 443506e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 443606e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 443706e4ae5fSStephen Warren CONFIG_ENV_SIZE. 443806e4ae5fSStephen Warren 44396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4440c609719bSwdenk 4441c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4442c609719bSwdenk area is used at an early stage (ROM part) if the environment 4443c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4444c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4445c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4446c609719bSwdenk to be a good choice since it makes it far enough from the 4447c609719bSwdenk start of the data area as well as from the stack pointer. 4448c609719bSwdenk 4449e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4450c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4451cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4452c609719bSwdenkuntil then to read environment variables. 4453c609719bSwdenk 445485ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 445585ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 445685ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 445785ec0bccSwdenknecessary, because the first environment variable we need is the 445885ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 445985ec0bccSwdenkhave any device yet where we could complain.] 4460c609719bSwdenk 4461c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4462c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 446385ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4464c609719bSwdenk 44656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4466fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4467fc3e2165Swdenk 44686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4469fc3e2165Swdenk also needs to be defined. 4470fc3e2165Swdenk 44716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4472fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4473c609719bSwdenk 4474f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4475f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4476f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4477f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4478f5675aa5SRon Madrid space for already greatly restricted images, including but not 4479f5675aa5SRon Madrid limited to NAND_SPL configurations. 4480f5675aa5SRon Madrid 4481b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4482b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4483b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4484b2b92f53SSimon Glass to do this. 4485b2b92f53SSimon Glass 4486e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4487e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4488e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4489e2e3e2b1SSimon Glass present. 4490e2e3e2b1SSimon Glass 4491feb85801SSascha Silbe- CONFIG_BOARD_SIZE_LIMIT: 4492feb85801SSascha Silbe Maximum size of the U-Boot image. When defined, the 4493feb85801SSascha Silbe build system checks that the actual size does not 4494feb85801SSascha Silbe exceed it. 4495feb85801SSascha Silbe 4496c609719bSwdenkLow Level (hardware related) configuration options: 4497dc7c9a1aSwdenk--------------------------------------------------- 4498c609719bSwdenk 44996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4500c609719bSwdenk Cache Line Size of the CPU. 4501c609719bSwdenk 45026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4503c609719bSwdenk Default address of the IMMR after system reset. 45042535d602Swdenk 45052535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 45062535d602Swdenk and RPXsuper) to be able to adjust the position of 45072535d602Swdenk the IMMR register after a reset. 4508c609719bSwdenk 4509e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4510e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4511e46fedfeSTimur Tabi PowerPC SOCs. 4512e46fedfeSTimur Tabi 4513e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4514e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4515e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4516e46fedfeSTimur Tabi 4517e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4518e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4519e46fedfeSTimur Tabi 4520e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4521e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4522e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4523e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4524e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4525e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4526e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4527e46fedfeSTimur Tabi 4528e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4529e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4530e46fedfeSTimur Tabi 4531e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4532e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4533e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4534e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4535e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4536e46fedfeSTimur Tabi 4537e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4538e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4539e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4540e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4541e46fedfeSTimur Tabi 4542e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4543e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4544e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4545e46fedfeSTimur Tabi 45467f6c2cbcSwdenk- Floppy Disk Support: 45476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 45487f6c2cbcSwdenk 45497f6c2cbcSwdenk the default drive number (default value 0) 45507f6c2cbcSwdenk 45516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 45527f6c2cbcSwdenk 455311ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 45547f6c2cbcSwdenk (default value 1) 45557f6c2cbcSwdenk 45566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 45577f6c2cbcSwdenk 45587f6c2cbcSwdenk defines the offset of register from address. It 45597f6c2cbcSwdenk depends on which part of the data bus is connected to 456011ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 45617f6c2cbcSwdenk 45626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 45636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 45647f6c2cbcSwdenk default value. 45657f6c2cbcSwdenk 45666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 45677f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 45687f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 45697f6c2cbcSwdenk source code. It is used to make hardware dependant 45707f6c2cbcSwdenk initializations. 45717f6c2cbcSwdenk 45720abddf82SMacpaul Lin- CONFIG_IDE_AHB: 45730abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 45740abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 45750abddf82SMacpaul Lin When software is doing ATA command and data transfer to 45760abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 45770abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 45780abddf82SMacpaul Lin is requierd. 45790abddf82SMacpaul Lin 45806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 458125d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 458225d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4583c609719bSwdenk 45846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4585c609719bSwdenk 45867152b1d0Swdenk Start address of memory area that can be used for 4587c609719bSwdenk initial data and stack; please note that this must be 4588c609719bSwdenk writable memory that is working WITHOUT special 4589c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4590c609719bSwdenk will become available only after programming the 4591c609719bSwdenk memory controller and running certain initialization 4592c609719bSwdenk sequences. 4593c609719bSwdenk 4594c609719bSwdenk U-Boot uses the following memory types: 4595c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4596c609719bSwdenk - MPC824X: data cache 4597c609719bSwdenk - PPC4xx: data cache 4598c609719bSwdenk 45996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4600c609719bSwdenk 4601c609719bSwdenk Offset of the initial data structure in the memory 46026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 46036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4604c609719bSwdenk data is located at the end of the available space 4605553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 46066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 46076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 46086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4609c609719bSwdenk 4610c609719bSwdenk Note: 4611c609719bSwdenk On the MPC824X (or other systems that use the data 4612c609719bSwdenk cache for initial memory) the address chosen for 46136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4614c609719bSwdenk point to an otherwise UNUSED address space between 4615c609719bSwdenk the top of RAM and the start of the PCI space. 4616c609719bSwdenk 46176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4618c609719bSwdenk 46196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4620c609719bSwdenk 46216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4622c609719bSwdenk 46236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4624c609719bSwdenk 46256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4626c609719bSwdenk 46276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4628c609719bSwdenk 46296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4630c609719bSwdenk SDRAM timing 4631c609719bSwdenk 46326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4633c609719bSwdenk periodic timer for refresh 4634c609719bSwdenk 46356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4636c609719bSwdenk 46376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 46386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 46396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 46406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4641c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4642c609719bSwdenk 4643c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 46446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 46456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4646c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4647c609719bSwdenk 46486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 46496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4650c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4651c609719bSwdenk Prescaler definitions (SDRAM timing) 4652c609719bSwdenk 46536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4654c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4655c609719bSwdenk define relocation offset in DPRAM [DSP2] 4656c609719bSwdenk 46576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4658b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4659b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4660b423d055SHeiko Schocher 46616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4662c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4663c609719bSwdenk define relocation offset in DPRAM [SCC4] 4664c609719bSwdenk 46656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4666c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4667c609719bSwdenk wrong setting might damage your board. Read 4668c609719bSwdenk doc/README.MBX before setting this variable! 4669c609719bSwdenk 46706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4671ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4672ea909b76Swdenk (Power On Self Tests). This definition overrides 4673ea909b76Swdenk #define'd default value in commproc.h resp. 4674ea909b76Swdenk cpm_8260.h. 4675ea909b76Swdenk 46766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 46776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 46786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 46796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 46806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 46816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 46826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 46836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4684a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 46855d232d0eSwdenk 46869cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 46879cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 46889cacf4fcSDirk Eibach required. 46899cacf4fcSDirk Eibach 469069fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 469169fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 469269fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 469369fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 469469fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 469569fd2d3bSAndrew Sharp by coreboot or similar. 469669fd2d3bSAndrew Sharp 4697842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4698842033e6SGabor Juhos Enable support for indirect PCI bridges. 4699842033e6SGabor Juhos 4700a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4701a09b9b68SKumar Gala Chip has SRIO or not 4702a09b9b68SKumar Gala 4703a09b9b68SKumar Gala- CONFIG_SRIO1: 4704a09b9b68SKumar Gala Board has SRIO 1 port available 4705a09b9b68SKumar Gala 4706a09b9b68SKumar Gala- CONFIG_SRIO2: 4707a09b9b68SKumar Gala Board has SRIO 2 port available 4708a09b9b68SKumar Gala 4709c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4710c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4711c8b28152SLiu Gang 4712a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4713a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4714a09b9b68SKumar Gala 4715a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4716a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4717a09b9b68SKumar Gala 4718a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4719a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4720a09b9b68SKumar Gala 472166bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 472266bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 472366bd1846SFabio Estevam a 16 bit bus. 472466bd1846SFabio Estevam Not all NAND drivers use this symbol. 4725a430e916SFabio Estevam Example of drivers that use it: 472666bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4727a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4728eced4626SAlex Waterman 4729eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4730eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4731eced4626SAlex Waterman a default value will be used. 4732eced4626SAlex Waterman 4733bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4734218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4735218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4736218ca724SWolfgang Denk 4737bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4738bb99ad6dSBen Warren I2C address of the SPD EEPROM 4739bb99ad6dSBen Warren 47406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4741218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4742218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4743218ca724SWolfgang Denk to something your driver can deal with. 4744bb99ad6dSBen Warren 47451b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 47461b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 47471b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 47481b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 47491b3e3c4fSYork Sun header files or board specific files. 47501b3e3c4fSYork Sun 47516f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 47526f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 47536f5e1dc5SYork Sun 47546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4755218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4756218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 47572ad6b513STimur Tabi 4758c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4759c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4760c26e454dSwdenk 4761c26e454dSwdenk- CONFIG_FEC[12]_PHY 4762c26e454dSwdenk Define to the hardcoded PHY address which corresponds 47636e592385Swdenk to the given FEC; i. e. 4764c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4765c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4766c26e454dSwdenk 4767c26e454dSwdenk When set to -1, means to probe for first available. 4768c26e454dSwdenk 4769c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4770c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4771c26e454dSwdenk (so program the FEC to ignore it). 4772c26e454dSwdenk 4773c26e454dSwdenk- CONFIG_RMII 4774c26e454dSwdenk Enable RMII mode for all FECs. 4775c26e454dSwdenk Note that this is a global option, we can't 4776c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4777c26e454dSwdenk 47785cf91d6bSwdenk- CONFIG_CRC32_VERIFY 47795cf91d6bSwdenk Add a verify option to the crc32 command. 47805cf91d6bSwdenk The syntax is: 47815cf91d6bSwdenk 47825cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 47835cf91d6bSwdenk 47845cf91d6bSwdenk Where address/count indicate a memory area 47855cf91d6bSwdenk and crc32 is the correct crc32 which the 47865cf91d6bSwdenk area should have. 47875cf91d6bSwdenk 478856523f12Swdenk- CONFIG_LOOPW 478956523f12Swdenk Add the "loopw" memory command. This only takes effect if 4790602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 479156523f12Swdenk 47927b466641Sstroese- CONFIG_MX_CYCLIC 47937b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 47947b466641Sstroese "md/mw" commands. 47957b466641Sstroese Examples: 47967b466641Sstroese 47977b466641Sstroese => mdc.b 10 4 500 47987b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 47997b466641Sstroese 48007b466641Sstroese => mwc.l 100 12345678 10 48017b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 48027b466641Sstroese 48037b466641Sstroese This only takes effect if the memory commands are activated 4804602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 48057b466641Sstroese 48068aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4807afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4808e03f3169SWolfgang Denk low level initializations (like setting up the memory 4809e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4810e03f3169SWolfgang Denk relocate itself into RAM. 48118aa1a2d1Swdenk 4812e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4813e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4814e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4815e03f3169SWolfgang Denk these initializations itself. 48168aa1a2d1Swdenk 4817401bb30bSAneesh V- CONFIG_SPL_BUILD 4818df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4819df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4820df81238bSMagnus Lilja compiling a NAND SPL. 4821400558b5Swdenk 48223aa29de0SYing Zhang- CONFIG_TPL_BUILD 48233aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 48243aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 48253aa29de0SYing Zhang It is loaded by the SPL. 48263aa29de0SYing Zhang 48275df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 48285df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 48295df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 48305df572f0SYing Zhang previous 4k of the .text section. 48315df572f0SYing Zhang 48324213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 48334213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 48344213fc29SSimon Glass effective address. It is therefore not necessary to regard 48354213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 48364213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 48374213fc29SSimon Glass it maintains its own little RAM buffer which contains all 48384213fc29SSimon Glass addressable memory. This option causes some memory accesses 48394213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 48404213fc29SSimon Glass 4841d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4842d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4843d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4844d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4845d8834a13SMatthias Weisser conditions but may increase the binary size. 4846d8834a13SMatthias Weisser 4847588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4848588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4849588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4850b16f521aSGabe Black 4851fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4852fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4853fc33705eSMark Jackson 4854fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 48555b5ece9eSGabe Black 485616678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 485716678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 485816678eb4SHeiko Schocher 4859999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 4860999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 4861999d7d32SKaricheri, Muralidharan driver that uses this: 4862999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 4863999d7d32SKaricheri, Muralidharan 4864f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4865f2717b47STimur Tabi----------------------------------- 4866f2717b47STimur Tabi 4867f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4868f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4869f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4870f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4871f2717b47STimur Tabiwithin that device. 4872f2717b47STimur Tabi 4873dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4874dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4875dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4876dcf1d774SZhao Qiang is also specified. 4877dcf1d774SZhao Qiang 4878dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4879dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4880f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4881f2717b47STimur Tabi is also specified. 4882f2717b47STimur Tabi 4883f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4884f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4885f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4886f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4887f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4888f2717b47STimur Tabi 4889f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4890f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4891f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4892f2717b47STimur Tabi virtual address in NOR flash. 4893f2717b47STimur Tabi 4894f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4895f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4896f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4897f2717b47STimur Tabi 4898f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4899f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4900f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4901f2717b47STimur Tabi 4902f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4903f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4904f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4905f2717b47STimur Tabi 4906292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4907292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4908292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4909fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4910fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4911fc54c7faSLiu Gang master's memory space. 4912f2717b47STimur Tabi 4913b940ca64SJ. German RiveraFreescale Layerscape Management Complex Firmware Support: 4914b940ca64SJ. German Rivera--------------------------------------------------------- 4915b940ca64SJ. German RiveraThe Freescale Layerscape Management Complex (MC) supports the loading of 4916b940ca64SJ. German Rivera"firmware". 4917b940ca64SJ. German RiveraThis firmware often needs to be loaded during U-Boot booting, so macros 4918b940ca64SJ. German Riveraare used to identify the storage device (NOR flash, SPI, etc) and the address 4919b940ca64SJ. German Riverawithin that device. 4920b940ca64SJ. German Rivera 4921b940ca64SJ. German Rivera- CONFIG_FSL_MC_ENET 4922b940ca64SJ. German Rivera Enable the MC driver for Layerscape SoCs. 4923b940ca64SJ. German Rivera 4924b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_ADDR 4925b940ca64SJ. German Rivera The address in the storage device where the firmware is located. The 4926b940ca64SJ. German Rivera meaning of this address depends on which CONFIG_SYS_LS_MC_FW_IN_xxx macro 4927b940ca64SJ. German Rivera is also specified. 4928b940ca64SJ. German Rivera 4929b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_LENGTH 4930b940ca64SJ. German Rivera The maximum possible size of the firmware. The firmware binary format 4931b940ca64SJ. German Rivera has a field that specifies the actual size of the firmware, but it 4932b940ca64SJ. German Rivera might not be possible to read any part of the firmware unless some 4933b940ca64SJ. German Rivera local storage is allocated to hold the entire firmware first. 4934b940ca64SJ. German Rivera 4935b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_IN_NOR 4936b940ca64SJ. German Rivera Specifies that MC firmware is located in NOR flash, mapped as 4937b940ca64SJ. German Rivera normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the 4938b940ca64SJ. German Rivera virtual address in NOR flash. 4939b940ca64SJ. German Rivera 4940c609719bSwdenkBuilding the Software: 4941c609719bSwdenk====================== 4942c609719bSwdenk 4943218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4944218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4945218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4946218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4947218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4948218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4949c609719bSwdenk 4950218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4951218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4952218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4953218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4954218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4955c609719bSwdenk 4956218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4957218ca724SWolfgang Denk $ export CROSS_COMPILE 4958c609719bSwdenk 49592f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 49602f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 49612f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 49622f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 49632f8d396bSPeter Tyser 49642f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 49652f8d396bSPeter Tyser 49662f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 49672f8d396bSPeter Tyser be executed on computers running Windows. 49682f8d396bSPeter Tyser 4969c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4970c609719bSwdenksources you must configure U-Boot for one specific board type. This 4971c609719bSwdenkis done by typing: 4972c609719bSwdenk 4973ab584d67SHolger Freyther make NAME_defconfig 4974c609719bSwdenk 4975ab584d67SHolger Freytherwhere "NAME_defconfig" is the name of one of the existing configu- 49764d675ae6SMichael Jonesrations; see boards.cfg for supported names. 497754387ac9Swdenk 4978c609719bSwdenkNote: for some board special configuration names may exist; check if 4979c609719bSwdenk additional information is available from the board vendor; for 49802729af9dSwdenk instance, the TQM823L systems are available without (standard) 49812729af9dSwdenk or with LCD support. You can select such additional "features" 498211ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4983c609719bSwdenk 4984ab584d67SHolger Freyther make TQM823L_defconfig 49852729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4986c609719bSwdenk 4987ab584d67SHolger Freyther make TQM823L_LCD_defconfig 4988c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4989c609719bSwdenk 4990c609719bSwdenk etc. 4991c609719bSwdenk 4992c609719bSwdenk 4993c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 49947152b1d0Swdenkimages ready for download to / installation on your system: 4995c609719bSwdenk 4996c609719bSwdenk- "u-boot.bin" is a raw binary image 4997c609719bSwdenk- "u-boot" is an image in ELF binary format 4998c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4999c609719bSwdenk 5000baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 5001baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 5002baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 5003baf31249SMarian Balakowicz 5004baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 5005baf31249SMarian Balakowicz 5006baf31249SMarian Balakowicz make O=/tmp/build distclean 5007ab584d67SHolger Freyther make O=/tmp/build NAME_defconfig 5008baf31249SMarian Balakowicz make O=/tmp/build all 5009baf31249SMarian Balakowicz 5010baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 5011baf31249SMarian Balakowicz 5012baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 5013baf31249SMarian Balakowicz make distclean 5014ab584d67SHolger Freyther make NAME_defconfig 5015baf31249SMarian Balakowicz make all 5016baf31249SMarian Balakowicz 5017baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 5018baf31249SMarian Balakowiczvariable. 5019baf31249SMarian Balakowicz 5020c609719bSwdenk 5021c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 5022c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 5023c609719bSwdenknative "make". 5024c609719bSwdenk 5025c609719bSwdenk 5026c609719bSwdenkIf the system board that you have is not listed, then you will need 5027c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 5028c609719bSwdenksteps: 5029c609719bSwdenk 5030c609719bSwdenk1. Add a new configuration option for your board to the toplevel 50314d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 50324d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 5033c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 503485ec0bccSwdenk files you need. In your board directory, you will need at least 503585ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 503685ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 503785ec0bccSwdenk your board 5038c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 5039c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 5040ab584d67SHolger Freyther4. Run "make <board>_defconfig" with your new name. 5041c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 5042c609719bSwdenk to be installed on your target system. 504385ec0bccSwdenk6. Debug and solve any problems that might arise. 5044c609719bSwdenk [Of course, this last step is much harder than it sounds.] 5045c609719bSwdenk 5046c609719bSwdenk 5047c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 5048c609719bSwdenk============================================================== 5049c609719bSwdenk 5050c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 5051c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 5052c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 5053c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 5054218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 5055c609719bSwdenk 5056c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 5057c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 5058c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 5059c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 5060c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 50617152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 5062218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 5063218ca724SWolfgang Denkyou can type 5064c609719bSwdenk 5065c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 5066c609719bSwdenk 5067c609719bSwdenkor to build on a native PowerPC system you can type 5068c609719bSwdenk 5069c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 5070c609719bSwdenk 5071218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 5072218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 5073218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 5074218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 5075218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 5076218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 5077218ca724SWolfgang Denkvariable. For example: 5078baf31249SMarian Balakowicz 5079baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 5080baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 5081baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 5082baf31249SMarian Balakowicz 5083218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 5084218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 5085218ca724SWolfgang Denkduring the whole build process. 5086baf31249SMarian Balakowicz 5087baf31249SMarian Balakowicz 5088c609719bSwdenkSee also "U-Boot Porting Guide" below. 5089c609719bSwdenk 5090c609719bSwdenk 5091c609719bSwdenkMonitor Commands - Overview: 5092c609719bSwdenk============================ 5093c609719bSwdenk 5094c609719bSwdenkgo - start application at address 'addr' 5095c609719bSwdenkrun - run commands in an environment variable 5096c609719bSwdenkbootm - boot application image from memory 5097c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 509844f074c7SMarek Vasutbootz - boot zImage from memory 5099c609719bSwdenktftpboot- boot image via network using TFTP protocol 5100c609719bSwdenk and env variables "ipaddr" and "serverip" 5101c609719bSwdenk (and eventually "gatewayip") 51021fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 5103c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 5104c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 5105c609719bSwdenkloads - load S-Record file over serial line 5106c609719bSwdenkloadb - load binary file over serial line (kermit mode) 5107c609719bSwdenkmd - memory display 5108c609719bSwdenkmm - memory modify (auto-incrementing) 5109c609719bSwdenknm - memory modify (constant address) 5110c609719bSwdenkmw - memory write (fill) 5111c609719bSwdenkcp - memory copy 5112c609719bSwdenkcmp - memory compare 5113c609719bSwdenkcrc32 - checksum calculation 51140f89c54bSPeter Tyseri2c - I2C sub-system 5115c609719bSwdenksspi - SPI utility commands 5116c609719bSwdenkbase - print or set address offset 5117c609719bSwdenkprintenv- print environment variables 5118c609719bSwdenksetenv - set environment variables 5119c609719bSwdenksaveenv - save environment variables to persistent storage 5120c609719bSwdenkprotect - enable or disable FLASH write protection 5121c609719bSwdenkerase - erase FLASH memory 5122c609719bSwdenkflinfo - print FLASH memory information 512310635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 5124c609719bSwdenkbdinfo - print Board Info structure 5125c609719bSwdenkiminfo - print header information for application image 5126c609719bSwdenkconinfo - print console devices and informations 5127c609719bSwdenkide - IDE sub-system 5128c609719bSwdenkloop - infinite loop on address range 512956523f12Swdenkloopw - infinite write loop on address range 5130c609719bSwdenkmtest - simple RAM test 5131c609719bSwdenkicache - enable or disable instruction cache 5132c609719bSwdenkdcache - enable or disable data cache 5133c609719bSwdenkreset - Perform RESET of the CPU 5134c609719bSwdenkecho - echo args to console 5135c609719bSwdenkversion - print monitor version 5136c609719bSwdenkhelp - print online help 5137c609719bSwdenk? - alias for 'help' 5138c609719bSwdenk 5139c609719bSwdenk 5140c609719bSwdenkMonitor Commands - Detailed Description: 5141c609719bSwdenk======================================== 5142c609719bSwdenk 5143c609719bSwdenkTODO. 5144c609719bSwdenk 5145c609719bSwdenkFor now: just type "help <command>". 5146c609719bSwdenk 5147c609719bSwdenk 5148c609719bSwdenkEnvironment Variables: 5149c609719bSwdenk====================== 5150c609719bSwdenk 5151c609719bSwdenkU-Boot supports user configuration using Environment Variables which 5152c609719bSwdenkcan be made persistent by saving to Flash memory. 5153c609719bSwdenk 5154c609719bSwdenkEnvironment Variables are set using "setenv", printed using 5155c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 5156c609719bSwdenkwithout a value can be used to delete a variable from the 5157c609719bSwdenkenvironment. As long as you don't save the environment you are 5158c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 5159c609719bSwdenkenvironment is erased by accident, a default environment is provided. 5160c609719bSwdenk 5161c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 5162c96f86eeSWolfgang Denk 5163c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 5164c609719bSwdenk 5165c609719bSwdenk baudrate - see CONFIG_BAUDRATE 5166c609719bSwdenk 5167c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 5168c609719bSwdenk 5169c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 5170c609719bSwdenk 5171c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 5172c609719bSwdenk 5173c609719bSwdenk bootfile - Name of the image to load with TFTP 5174c609719bSwdenk 51757d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 51767d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51777d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 51787d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 51797d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 51807d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 5181c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 5182c3624e6eSGrant Likely bootm_mapsize. 5183c3624e6eSGrant Likely 5184c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 5185c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 5186c3624e6eSGrant Likely defines the size of the memory region starting at base 5187c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 5188c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 5189c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 5190c3624e6eSGrant Likely used otherwise. 51917d721e34SBartlomiej Sieka 51927d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 51937d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51947d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 51957d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 51967d721e34SBartlomiej Sieka environment variable. 51977d721e34SBartlomiej Sieka 51984bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 51994bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 52004bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 52014bae9090SBartlomiej Sieka 5202c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 5203c609719bSwdenk "bootp" will just load perform a lookup of the 5204c609719bSwdenk configuration from the BOOTP server, but not try to 5205c609719bSwdenk load any image using TFTP 5206c609719bSwdenk 5207c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 5208c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 5209c609719bSwdenk be automatically started (by internally calling 5210c609719bSwdenk "bootm") 5211c609719bSwdenk 52124a6fd34bSwdenk If set to "no", a standalone image passed to the 52134a6fd34bSwdenk "bootm" command will be copied to the load address 52144a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 52154a6fd34bSwdenk This can be used to load and uncompress arbitrary 52164a6fd34bSwdenk data. 52174a6fd34bSwdenk 5218a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 5219a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 5220fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 5221fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 5222fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 5223fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 5224fa34f6b2SShawn Guo device tree blob be copied to the maximum address 5225fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 5226fa34f6b2SShawn Guo access it during the boot procedure. 5227fa34f6b2SShawn Guo 5228a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 5229a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 5230a28afca5SDavid A. Long to work it must reside in writable memory, have 5231a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 5232a28afca5SDavid A. Long add the information it needs into it, and the memory 5233a28afca5SDavid A. Long must be accessible by the kernel. 5234a28afca5SDavid A. Long 5235eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 5236eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 5237eea63e05SSimon Glass defined. 5238eea63e05SSimon Glass 523917ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 524017ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 524117ea1177Swdenk mode (400kHZ). This environment variable is used in 524217ea1177Swdenk initialization code. So, for changes to be effective 524317ea1177Swdenk it must be saved and board must be reset. 524417ea1177Swdenk 5245c609719bSwdenk initrd_high - restrict positioning of initrd images: 5246c609719bSwdenk If this variable is not set, initrd images will be 5247c609719bSwdenk copied to the highest possible address in RAM; this 5248c609719bSwdenk is usually what you want since it allows for 5249c609719bSwdenk maximum initrd size. If for some reason you want to 5250c609719bSwdenk make sure that the initrd image is loaded below the 52516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 5252c609719bSwdenk variable to a value of "no" or "off" or "0". 5253c609719bSwdenk Alternatively, you can set it to a maximum upper 5254c609719bSwdenk address to use (U-Boot will still check that it 5255c609719bSwdenk does not overwrite the U-Boot stack and data). 5256c609719bSwdenk 5257c609719bSwdenk For instance, when you have a system with 16 MB 52587152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 5259c609719bSwdenk you can do this by adding "mem=12M" to the value of 5260c609719bSwdenk the "bootargs" variable. However, now you must make 52617152b1d0Swdenk sure that the initrd image is placed in the first 5262c609719bSwdenk 12 MB as well - this can be done with 5263c609719bSwdenk 5264c609719bSwdenk setenv initrd_high 00c00000 5265c609719bSwdenk 526638b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 526738b99261Swdenk indication to U-Boot that all addresses are legal 526838b99261Swdenk for the Linux kernel, including addresses in flash 526938b99261Swdenk memory. In this case U-Boot will NOT COPY the 527038b99261Swdenk ramdisk at all. This may be useful to reduce the 527138b99261Swdenk boot time on your system, but requires that this 527238b99261Swdenk feature is supported by your Linux kernel. 527338b99261Swdenk 5274c609719bSwdenk ipaddr - IP address; needed for tftpboot command 5275c609719bSwdenk 5276c609719bSwdenk loadaddr - Default load address for commands like "bootp", 5277dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 5278c609719bSwdenk 5279c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 5280c609719bSwdenk 5281c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 5282c609719bSwdenk 5283c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 5284c609719bSwdenk 5285c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 5286c609719bSwdenk 5287c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 5288c609719bSwdenk 5289e2a53458SMike Frysinger ethprime - controls which interface is used first. 5290a3d991bdSwdenk 5291e2a53458SMike Frysinger ethact - controls which interface is currently active. 5292e2a53458SMike Frysinger For example you can do the following 5293a3d991bdSwdenk 529448690d80SHeiko Schocher => setenv ethact FEC 529548690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 529648690d80SHeiko Schocher => setenv ethact SCC 529748690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 5298a3d991bdSwdenk 5299e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 5300e1692577SMatthias Fuchs available network interfaces. 5301e1692577SMatthias Fuchs It just stays at the currently selected interface. 5302e1692577SMatthias Fuchs 5303a3d991bdSwdenk netretry - When set to "no" each network operation will 5304a3d991bdSwdenk either succeed or fail without retrying. 53056e592385Swdenk When set to "once" the network operation will 53066e592385Swdenk fail when all the available network interfaces 53076e592385Swdenk are tried once without success. 5308a3d991bdSwdenk Useful on scripts which control the retry operation 5309a3d991bdSwdenk themselves. 5310a3d991bdSwdenk 5311b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 5312a1cf027aSJean-Christophe PLAGNIOL-VILLARD 53138d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 53148d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 53158d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 53168d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 53178d51aacdSSimon Glass is silent. 53188d51aacdSSimon Glass 531928cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 5320ecb0ccd9SWolfgang Denk UDP source port. 5321ecb0ccd9SWolfgang Denk 532228cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 532328cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 532428cb9375SWolfgang Denk 5325c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 5326c96f86eeSWolfgang Denk we use the TFTP server's default block size 5327c96f86eeSWolfgang Denk 5328c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 5329c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 5330c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 5331c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 5332c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 5333c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 5334c96f86eeSWolfgang Denk with unreliable TFTP servers. 5335c96f86eeSWolfgang Denk 5336a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 533711ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 5338a3d991bdSwdenk VLAN tagged frames. 5339c609719bSwdenk 5340dc0b7b0eSJason HobbsThe following image location variables contain the location of images 5341dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 5342dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 5343dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 5344dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 5345dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 5346dc0b7b0eSJason Hobbsflash or offset in NAND flash. 5347dc0b7b0eSJason Hobbs 5348dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 5349dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 5350dc0b7b0eSJason Hobbsboards use these variables for other purposes. 5351dc0b7b0eSJason Hobbs 5352dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 5353dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5354dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5355dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5356dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5357dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5358dc0b7b0eSJason Hobbs 5359c609719bSwdenkThe following environment variables may be used and automatically 5360c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5361c609719bSwdenkdepending the information provided by your boot server: 5362c609719bSwdenk 5363c609719bSwdenk bootfile - see above 5364c609719bSwdenk dnsip - IP address of your Domain Name Server 5365fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5366c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5367c609719bSwdenk hostname - Target hostname 5368c609719bSwdenk ipaddr - see above 5369c609719bSwdenk netmask - Subnet Mask 5370c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5371c609719bSwdenk serverip - see above 5372c609719bSwdenk 5373c609719bSwdenk 5374c609719bSwdenkThere are two special Environment Variables: 5375c609719bSwdenk 5376c609719bSwdenk serial# - contains hardware identification information such 5377c609719bSwdenk as type string and/or serial number 5378c609719bSwdenk ethaddr - Ethernet address 5379c609719bSwdenk 5380c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5381c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5382c609719bSwdenkonce they have been set once. 5383c609719bSwdenk 5384c609719bSwdenk 5385c1551ea8SstroeseFurther special Environment Variables: 5386c1551ea8Sstroese 5387c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5388c1551ea8Sstroese with the "version" command. This variable is 5389c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5390c1551ea8Sstroese 5391c1551ea8Sstroese 5392c609719bSwdenkPlease note that changes to some configuration parameters may take 5393c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5394c609719bSwdenk 5395c609719bSwdenk 5396170ab110SJoe HershbergerCallback functions for environment variables: 5397170ab110SJoe Hershberger--------------------------------------------- 5398170ab110SJoe Hershberger 5399170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5400170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5401170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5402170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5403170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5404170ab110SJoe Hershberger 5405170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5406170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5407170ab110SJoe Hershberger 5408170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5409170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5410170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5411170ab110SJoe Hershbergerassociations. The list must be in the following format: 5412170ab110SJoe Hershberger 5413170ab110SJoe Hershberger entry = variable_name[:callback_name] 5414170ab110SJoe Hershberger list = entry[,list] 5415170ab110SJoe Hershberger 5416170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5417170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5418170ab110SJoe Hershberger 5419170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5420170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5421170ab110SJoe Hershbergeroverride any association in the static list. You can define 5422170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5423170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5424170ab110SJoe Hershberger 5425170ab110SJoe Hershberger 5426f07771ccSwdenkCommand Line Parsing: 5427f07771ccSwdenk===================== 5428f07771ccSwdenk 5429f07771ccSwdenkThere are two different command line parsers available with U-Boot: 54307152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5431f07771ccSwdenk 5432f07771ccSwdenkOld, simple command line parser: 5433f07771ccSwdenk-------------------------------- 5434f07771ccSwdenk 5435f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5436f07771ccSwdenk- several commands on one line, separated by ';' 5437fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5438f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5439f07771ccSwdenk for example: 5440fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5441f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5442f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5443f07771ccSwdenk 5444f07771ccSwdenkHush shell: 5445f07771ccSwdenk----------- 5446f07771ccSwdenk 5447f07771ccSwdenk- similar to Bourne shell, with control structures like 5448f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5449f07771ccSwdenk until...do...done, ... 5450f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5451f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5452f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5453f07771ccSwdenk command 5454f07771ccSwdenk 5455f07771ccSwdenkGeneral rules: 5456f07771ccSwdenk-------------- 5457f07771ccSwdenk 5458f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5459f07771ccSwdenk command) contains several commands separated by semicolon, and 5460f07771ccSwdenk one of these commands fails, then the remaining commands will be 5461f07771ccSwdenk executed anyway. 5462f07771ccSwdenk 5463f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 546411ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5465f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5466f07771ccSwdenk variables are not executed. 5467f07771ccSwdenk 5468c609719bSwdenkNote for Redundant Ethernet Interfaces: 5469c609719bSwdenk======================================= 5470c609719bSwdenk 547111ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5472c609719bSwdenksuch configurations and is capable of automatic selection of a 54737152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5474c609719bSwdenk 5475c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5476c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5477c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5478c609719bSwdenk 5479c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5480c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5481c609719bSwdenkding setting in the environment; if the corresponding environment 5482c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5483c609719bSwdenk 5484c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5485c609719bSwdenk environment, the SROM's address is used. 5486c609719bSwdenk 5487c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5488c609719bSwdenk environment exists, then the value from the environment variable is 5489c609719bSwdenk used. 5490c609719bSwdenk 5491c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5492c609719bSwdenk both addresses are the same, this MAC address is used. 5493c609719bSwdenk 5494c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5495c609719bSwdenk addresses differ, the value from the environment is used and a 5496c609719bSwdenk warning is printed. 5497c609719bSwdenk 5498c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5499c609719bSwdenk is raised. 5500c609719bSwdenk 5501ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5502ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5503ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5504ecee9324SBen WarrenThe naming convention is as follows: 5505ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5506c609719bSwdenk 5507c609719bSwdenkImage Formats: 5508c609719bSwdenk============== 5509c609719bSwdenk 55103310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 55113310c549SMarian Balakowiczimages in two formats: 55123310c549SMarian Balakowicz 55133310c549SMarian BalakowiczNew uImage format (FIT) 55143310c549SMarian Balakowicz----------------------- 55153310c549SMarian Balakowicz 55163310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 55173310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 55183310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 55193310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 55203310c549SMarian Balakowicz 55213310c549SMarian Balakowicz 55223310c549SMarian BalakowiczOld uImage format 55233310c549SMarian Balakowicz----------------- 55243310c549SMarian Balakowicz 55253310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 55263310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 55273310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5528c609719bSwdenk 5529c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5530c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5531f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5532f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5533f5ed9e39SPeter Tyser INTEGRITY). 55347b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5535afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5536afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5537c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5538c609719bSwdenk* Load Address 5539c609719bSwdenk* Entry Point 5540c609719bSwdenk* Image Name 5541c609719bSwdenk* Image Timestamp 5542c609719bSwdenk 5543c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5544c609719bSwdenkand the data portions of the image are secured against corruption by 5545c609719bSwdenkCRC32 checksums. 5546c609719bSwdenk 5547c609719bSwdenk 5548c609719bSwdenkLinux Support: 5549c609719bSwdenk============== 5550c609719bSwdenk 5551c609719bSwdenkAlthough U-Boot should support any OS or standalone application 55527152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5553c609719bSwdenkU-Boot. 5554c609719bSwdenk 5555c609719bSwdenkU-Boot includes many features that so far have been part of some 5556c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5557c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5558c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 55597152b1d0Swdenkserves several purposes: 5560c609719bSwdenk 5561c609719bSwdenk- the same features can be used for other OS or standalone 5562c609719bSwdenk applications (for instance: using compressed images to reduce the 5563c609719bSwdenk Flash memory footprint) 5564c609719bSwdenk 5565c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 55667152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5567c609719bSwdenk 5568c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5569c609719bSwdenk images; of course this also means that different kernel images can 5570c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5571c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5572c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5573c609719bSwdenk software is easier now. 5574c609719bSwdenk 5575c609719bSwdenk 5576c609719bSwdenkLinux HOWTO: 5577c609719bSwdenk============ 5578c609719bSwdenk 5579c609719bSwdenkPorting Linux to U-Boot based systems: 5580c609719bSwdenk--------------------------------------- 5581c609719bSwdenk 5582c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5583c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5584c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5585c609719bSwdenkLinux :-). 5586c609719bSwdenk 5587a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5588c609719bSwdenk 5589c609719bSwdenkJust make sure your machine specific header file (for instance 5590c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 55911dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 55921dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 55936d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5594c609719bSwdenk 55952eb31b13SSimon GlassNote that U-Boot now has a driver model, a unified model for drivers. 55962eb31b13SSimon GlassIf you are adding a new driver, plumb it into driver model. If there 55972eb31b13SSimon Glassis no uclass available, you are encouraged to create one. See 55982eb31b13SSimon Glassdoc/driver-model. 55992eb31b13SSimon Glass 5600c609719bSwdenk 5601c609719bSwdenkConfiguring the Linux kernel: 5602c609719bSwdenk----------------------------- 5603c609719bSwdenk 5604c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5605c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5606c609719bSwdenk 5607c609719bSwdenk 5608c609719bSwdenkBuilding a Linux Image: 5609c609719bSwdenk----------------------- 5610c609719bSwdenk 561124ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 561224ee89b9Swdenknot used. If you use recent kernel source, a new build target 561324ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 561424ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 561524ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 561624ee89b9Swdenk100% compatible format. 5617c609719bSwdenk 5618c609719bSwdenkExample: 5619c609719bSwdenk 5620ab584d67SHolger Freyther make TQM850L_defconfig 5621c609719bSwdenk make oldconfig 5622c609719bSwdenk make dep 562324ee89b9Swdenk make uImage 5624c609719bSwdenk 562524ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 562624ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 562724ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5628c609719bSwdenk 562924ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 563024ee89b9Swdenk 563124ee89b9Swdenk* convert the kernel into a raw binary image: 563224ee89b9Swdenk 563324ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 563424ee89b9Swdenk -R .note -R .comment \ 563524ee89b9Swdenk -S vmlinux linux.bin 563624ee89b9Swdenk 563724ee89b9Swdenk* compress the binary image: 563824ee89b9Swdenk 563924ee89b9Swdenk gzip -9 linux.bin 564024ee89b9Swdenk 564124ee89b9Swdenk* package compressed binary image for U-Boot: 564224ee89b9Swdenk 564324ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 564424ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 564524ee89b9Swdenk -d linux.bin.gz uImage 564624ee89b9Swdenk 564724ee89b9Swdenk 564824ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 564924ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 565024ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 565124ee89b9Swdenkbyte header containing information about target architecture, 565224ee89b9Swdenkoperating system, image type, compression method, entry points, time 565324ee89b9Swdenkstamp, CRC32 checksums, etc. 565424ee89b9Swdenk 565524ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 565624ee89b9Swdenkprint the header information, or to build new images. 5657c609719bSwdenk 5658c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5659c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5660c609719bSwdenkchecksum verification: 5661c609719bSwdenk 5662c609719bSwdenk tools/mkimage -l image 5663c609719bSwdenk -l ==> list image header information 5664c609719bSwdenk 5665c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5666c609719bSwdenkfrom a "data file" which is used as image payload: 5667c609719bSwdenk 5668c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5669c609719bSwdenk -n name -d data_file image 5670c609719bSwdenk -A ==> set architecture to 'arch' 5671c609719bSwdenk -O ==> set operating system to 'os' 5672c609719bSwdenk -T ==> set image type to 'type' 5673c609719bSwdenk -C ==> set compression type 'comp' 5674c609719bSwdenk -a ==> set load address to 'addr' (hex) 5675c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5676c609719bSwdenk -n ==> set image name to 'name' 5677c609719bSwdenk -d ==> use image data from 'datafile' 5678c609719bSwdenk 567969459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 568069459791Swdenkaddress (0x00000000), but the entry point address depends on the 568169459791Swdenkkernel version: 5682c609719bSwdenk 5683c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 568424ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5685c609719bSwdenk 5686c609719bSwdenkSo a typical call to build a U-Boot image would read: 5687c609719bSwdenk 568824ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 568924ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5690a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 569124ee89b9Swdenk > examples/uImage.TQM850L 569224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5693c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5694c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5695c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5696c609719bSwdenk Load Address: 0x00000000 569724ee89b9Swdenk Entry Point: 0x00000000 5698c609719bSwdenk 5699c609719bSwdenkTo verify the contents of the image (or check for corruption): 5700c609719bSwdenk 570124ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 570224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5703c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5704c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5705c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5706c609719bSwdenk Load Address: 0x00000000 570724ee89b9Swdenk Entry Point: 0x00000000 5708c609719bSwdenk 5709c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5710c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5711c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5712c609719bSwdenkneed to be uncompressed: 5713c609719bSwdenk 5714a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 571524ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 571624ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5717a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 571824ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 571924ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5720c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5721c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5722c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5723c609719bSwdenk Load Address: 0x00000000 572424ee89b9Swdenk Entry Point: 0x00000000 5725c609719bSwdenk 5726c609719bSwdenk 5727c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5728c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5729c609719bSwdenk 5730c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5731c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5732c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5733c609719bSwdenk Image Name: Simple Ramdisk Image 5734c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5735c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5736c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5737c609719bSwdenk Load Address: 0x00000000 5738c609719bSwdenk Entry Point: 0x00000000 5739c609719bSwdenk 5740a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5741a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5742a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5743a804b5ceSGuilherme Maciel Ferreirafrom the image: 5744a804b5ceSGuilherme Maciel Ferreira 5745a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5746a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5747a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5748a804b5ceSGuilherme Maciel Ferreira 5749c609719bSwdenk 5750c609719bSwdenkInstalling a Linux Image: 5751c609719bSwdenk------------------------- 5752c609719bSwdenk 5753c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5754c609719bSwdenkyou must convert the image to S-Record format: 5755c609719bSwdenk 5756c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5757c609719bSwdenk 5758c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5759c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5760c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5761c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5762c609719bSwdenkcommand. 5763c609719bSwdenk 5764c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5765c609719bSwdenkTQM8xxL is in the first Flash bank): 5766c609719bSwdenk 5767c609719bSwdenk => erase 40100000 401FFFFF 5768c609719bSwdenk 5769c609719bSwdenk .......... done 5770c609719bSwdenk Erased 8 sectors 5771c609719bSwdenk 5772c609719bSwdenk => loads 40100000 5773c609719bSwdenk ## Ready for S-Record download ... 5774c609719bSwdenk ~>examples/image.srec 5775c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5776c609719bSwdenk ... 5777c609719bSwdenk 15989 15990 15991 15992 5778c609719bSwdenk [file transfer complete] 5779c609719bSwdenk [connected] 5780c609719bSwdenk ## Start Addr = 0x00000000 5781c609719bSwdenk 5782c609719bSwdenk 5783c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5784c609719bSwdenkthis includes a checksum verification so you can be sure no data 5785c609719bSwdenkcorruption happened: 5786c609719bSwdenk 5787c609719bSwdenk => imi 40100000 5788c609719bSwdenk 5789c609719bSwdenk ## Checking Image at 40100000 ... 5790c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5791c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5792c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5793c609719bSwdenk Load Address: 00000000 5794c609719bSwdenk Entry Point: 0000000c 5795c609719bSwdenk Verifying Checksum ... OK 5796c609719bSwdenk 5797c609719bSwdenk 5798c609719bSwdenkBoot Linux: 5799c609719bSwdenk----------- 5800c609719bSwdenk 5801c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5802c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5803c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5804c609719bSwdenkparameters. You can check and modify this variable using the 5805c609719bSwdenk"printenv" and "setenv" commands: 5806c609719bSwdenk 5807c609719bSwdenk 5808c609719bSwdenk => printenv bootargs 5809c609719bSwdenk bootargs=root=/dev/ram 5810c609719bSwdenk 5811c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5812c609719bSwdenk 5813c609719bSwdenk => printenv bootargs 5814c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5815c609719bSwdenk 5816c609719bSwdenk => bootm 40020000 5817c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5818c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5819c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5820c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5821c609719bSwdenk Load Address: 00000000 5822c609719bSwdenk Entry Point: 0000000c 5823c609719bSwdenk Verifying Checksum ... OK 5824c609719bSwdenk Uncompressing Kernel Image ... OK 5825c609719bSwdenk 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 5826c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5827c609719bSwdenk time_init: decrementer frequency = 187500000/60 5828c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5829c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5830c609719bSwdenk ... 5831c609719bSwdenk 583211ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 58337152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5834c609719bSwdenkformat!) to the "bootm" command: 5835c609719bSwdenk 5836c609719bSwdenk => imi 40100000 40200000 5837c609719bSwdenk 5838c609719bSwdenk ## Checking Image at 40100000 ... 5839c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5840c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5841c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5842c609719bSwdenk Load Address: 00000000 5843c609719bSwdenk Entry Point: 0000000c 5844c609719bSwdenk Verifying Checksum ... OK 5845c609719bSwdenk 5846c609719bSwdenk ## Checking Image at 40200000 ... 5847c609719bSwdenk Image Name: Simple Ramdisk Image 5848c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5849c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5850c609719bSwdenk Load Address: 00000000 5851c609719bSwdenk Entry Point: 00000000 5852c609719bSwdenk Verifying Checksum ... OK 5853c609719bSwdenk 5854c609719bSwdenk => bootm 40100000 40200000 5855c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5856c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5857c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5858c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5859c609719bSwdenk Load Address: 00000000 5860c609719bSwdenk Entry Point: 0000000c 5861c609719bSwdenk Verifying Checksum ... OK 5862c609719bSwdenk Uncompressing Kernel Image ... OK 5863c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5864c609719bSwdenk Image Name: Simple Ramdisk Image 5865c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5866c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5867c609719bSwdenk Load Address: 00000000 5868c609719bSwdenk Entry Point: 00000000 5869c609719bSwdenk Verifying Checksum ... OK 5870c609719bSwdenk Loading Ramdisk ... OK 5871c609719bSwdenk 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 5872c609719bSwdenk Boot arguments: root=/dev/ram 5873c609719bSwdenk time_init: decrementer frequency = 187500000/60 5874c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5875c609719bSwdenk ... 5876c609719bSwdenk RAMDISK: Compressed image found at block 0 5877c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5878c609719bSwdenk 5879c609719bSwdenk bash# 5880c609719bSwdenk 58810267768eSMatthew McClintockBoot Linux and pass a flat device tree: 58820267768eSMatthew McClintock----------- 58830267768eSMatthew McClintock 58840267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 58850267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 58860267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 58870267768eSMatthew McClintockflat device tree: 58880267768eSMatthew McClintock 58890267768eSMatthew McClintock=> print oftaddr 58900267768eSMatthew McClintockoftaddr=0x300000 58910267768eSMatthew McClintock=> print oft 58920267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 58930267768eSMatthew McClintock=> tftp $oftaddr $oft 58940267768eSMatthew McClintockSpeed: 1000, full duplex 58950267768eSMatthew McClintockUsing TSEC0 device 58960267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 58970267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 58980267768eSMatthew McClintockLoad address: 0x300000 58990267768eSMatthew McClintockLoading: # 59000267768eSMatthew McClintockdone 59010267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 59020267768eSMatthew McClintock=> tftp $loadaddr $bootfile 59030267768eSMatthew McClintockSpeed: 1000, full duplex 59040267768eSMatthew McClintockUsing TSEC0 device 59050267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 59060267768eSMatthew McClintockFilename 'uImage'. 59070267768eSMatthew McClintockLoad address: 0x200000 59080267768eSMatthew McClintockLoading:############ 59090267768eSMatthew McClintockdone 59100267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 59110267768eSMatthew McClintock=> print loadaddr 59120267768eSMatthew McClintockloadaddr=200000 59130267768eSMatthew McClintock=> print oftaddr 59140267768eSMatthew McClintockoftaddr=0x300000 59150267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 59160267768eSMatthew McClintock## Booting image at 00200000 ... 59170267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 59180267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 59190267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 59200267768eSMatthew McClintock Load Address: 00000000 59210267768eSMatthew McClintock Entry Point: 00000000 59220267768eSMatthew McClintock Verifying Checksum ... OK 59230267768eSMatthew McClintock Uncompressing Kernel Image ... OK 59240267768eSMatthew McClintockBooting using flat device tree at 0x300000 59250267768eSMatthew McClintockUsing MPC85xx ADS machine description 59260267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 59270267768eSMatthew McClintock[snip] 59280267768eSMatthew McClintock 59290267768eSMatthew McClintock 59306069ff26SwdenkMore About U-Boot Image Types: 59316069ff26Swdenk------------------------------ 59326069ff26Swdenk 59336069ff26SwdenkU-Boot supports the following image types: 59346069ff26Swdenk 59356069ff26Swdenk "Standalone Programs" are directly runnable in the environment 59366069ff26Swdenk provided by U-Boot; it is expected that (if they behave 59376069ff26Swdenk well) you can continue to work in U-Boot after return from 59386069ff26Swdenk the Standalone Program. 59396069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 59406069ff26Swdenk will take over control completely. Usually these programs 59416069ff26Swdenk will install their own set of exception handlers, device 59426069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 59436069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 59446069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 59456069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 59466069ff26Swdenk being started. 59476069ff26Swdenk "Multi-File Images" contain several images, typically an OS 59486069ff26Swdenk (Linux) kernel image and one or more data images like 59496069ff26Swdenk RAMDisks. This construct is useful for instance when you want 59506069ff26Swdenk to boot over the network using BOOTP etc., where the boot 59516069ff26Swdenk server provides just a single image file, but you want to get 59526069ff26Swdenk for instance an OS kernel and a RAMDisk image. 59536069ff26Swdenk 59546069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 59556069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 59566069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 59576069ff26Swdenk Immediately after the terminating 0 follow the images, one by 59586069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 59596069ff26Swdenk a multiple of 4 bytes). 59606069ff26Swdenk 59616069ff26Swdenk "Firmware Images" are binary images containing firmware (like 59626069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 59636069ff26Swdenk flash memory. 59646069ff26Swdenk 59656069ff26Swdenk "Script files" are command sequences that will be executed by 59666069ff26Swdenk U-Boot's command interpreter; this feature is especially 59676069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 59686069ff26Swdenk as command interpreter. 59696069ff26Swdenk 597044f074c7SMarek VasutBooting the Linux zImage: 597144f074c7SMarek Vasut------------------------- 597244f074c7SMarek Vasut 597344f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 597444f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 597544f074c7SMarek Vasutas the syntax of "bootm" command. 597644f074c7SMarek Vasut 59778ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5978017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5979017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5980017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5981017e1f3fSMarek Vasut 5982c609719bSwdenk 5983c609719bSwdenkStandalone HOWTO: 5984c609719bSwdenk================= 5985c609719bSwdenk 5986c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5987c609719bSwdenkrun "standalone" applications, which can use some resources of 5988c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5989c609719bSwdenk 5990c609719bSwdenkTwo simple examples are included with the sources: 5991c609719bSwdenk 5992c609719bSwdenk"Hello World" Demo: 5993c609719bSwdenk------------------- 5994c609719bSwdenk 5995c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5996c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5997c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5998c609719bSwdenklike that: 5999c609719bSwdenk 6000c609719bSwdenk => loads 6001c609719bSwdenk ## Ready for S-Record download ... 6002c609719bSwdenk ~>examples/hello_world.srec 6003c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 6004c609719bSwdenk [file transfer complete] 6005c609719bSwdenk [connected] 6006c609719bSwdenk ## Start Addr = 0x00040004 6007c609719bSwdenk 6008c609719bSwdenk => go 40004 Hello World! This is a test. 6009c609719bSwdenk ## Starting application at 0x00040004 ... 6010c609719bSwdenk Hello World 6011c609719bSwdenk argc = 7 6012c609719bSwdenk argv[0] = "40004" 6013c609719bSwdenk argv[1] = "Hello" 6014c609719bSwdenk argv[2] = "World!" 6015c609719bSwdenk argv[3] = "This" 6016c609719bSwdenk argv[4] = "is" 6017c609719bSwdenk argv[5] = "a" 6018c609719bSwdenk argv[6] = "test." 6019c609719bSwdenk argv[7] = "<NULL>" 6020c609719bSwdenk Hit any key to exit ... 6021c609719bSwdenk 6022c609719bSwdenk ## Application terminated, rc = 0x0 6023c609719bSwdenk 6024c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 6025c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 6026c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 6027c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 6028c609719bSwdenkcharacter, but this is just a demo program. The application can be 6029c609719bSwdenkcontrolled by the following keys: 6030c609719bSwdenk 6031c609719bSwdenk ? - print current values og the CPM Timer registers 6032c609719bSwdenk b - enable interrupts and start timer 6033c609719bSwdenk e - stop timer and disable interrupts 6034c609719bSwdenk q - quit application 6035c609719bSwdenk 6036c609719bSwdenk => loads 6037c609719bSwdenk ## Ready for S-Record download ... 6038c609719bSwdenk ~>examples/timer.srec 6039c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 6040c609719bSwdenk [file transfer complete] 6041c609719bSwdenk [connected] 6042c609719bSwdenk ## Start Addr = 0x00040004 6043c609719bSwdenk 6044c609719bSwdenk => go 40004 6045c609719bSwdenk ## Starting application at 0x00040004 ... 6046c609719bSwdenk TIMERS=0xfff00980 6047c609719bSwdenk Using timer 1 6048c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 6049c609719bSwdenk 6050c609719bSwdenkHit 'b': 6051c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 6052c609719bSwdenk Enabling timer 6053c609719bSwdenkHit '?': 6054c609719bSwdenk [q, b, e, ?] ........ 6055c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 6056c609719bSwdenkHit '?': 6057c609719bSwdenk [q, b, e, ?] . 6058c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 6059c609719bSwdenkHit '?': 6060c609719bSwdenk [q, b, e, ?] . 6061c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 6062c609719bSwdenkHit '?': 6063c609719bSwdenk [q, b, e, ?] . 6064c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 6065c609719bSwdenkHit 'e': 6066c609719bSwdenk [q, b, e, ?] ...Stopping timer 6067c609719bSwdenkHit 'q': 6068c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 6069c609719bSwdenk 6070c609719bSwdenk 607185ec0bccSwdenkMinicom warning: 607285ec0bccSwdenk================ 607385ec0bccSwdenk 60747152b1d0SwdenkOver time, many people have reported problems when trying to use the 607585ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 607685ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 6077f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 607885ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 6079e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 6080e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 6081e53515a2SKarl O. Pincfor help with kermit. 6082e53515a2SKarl O. Pinc 608385ec0bccSwdenk 608452f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 608552f52c14Swdenkconfiguration to your "File transfer protocols" section: 608652f52c14Swdenk 608752f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 608852f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 608952f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 609052f52c14Swdenk 609152f52c14Swdenk 6092c609719bSwdenkNetBSD Notes: 6093c609719bSwdenk============= 6094c609719bSwdenk 6095c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 6096c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 6097c609719bSwdenk 6098c609719bSwdenkBuilding requires a cross environment; it is known to work on 6099c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 6100c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 6101c609719bSwdenkNote that the cross-powerpc package does not install include files; 6102c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 6103c609719bSwdenkmissing. This file has to be installed and patched manually: 6104c609719bSwdenk 6105c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 6106c609719bSwdenk # mkdir powerpc 6107c609719bSwdenk # ln -s powerpc machine 6108c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 6109c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 6110c609719bSwdenk 6111c609719bSwdenkNative builds *don't* work due to incompatibilities between native 6112c609719bSwdenkand U-Boot include files. 6113c609719bSwdenk 6114c609719bSwdenkBooting assumes that (the first part of) the image booted is a 6115c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 6116c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 6117c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 61182a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 6119c609719bSwdenk 6120c609719bSwdenk 6121c609719bSwdenkImplementation Internals: 6122c609719bSwdenk========================= 6123c609719bSwdenk 6124c609719bSwdenkThe following is not intended to be a complete description of every 6125c609719bSwdenkimplementation detail. However, it should help to understand the 6126c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 6127c609719bSwdenkhardware. 6128c609719bSwdenk 6129c609719bSwdenk 6130c609719bSwdenkInitial Stack, Global Data: 6131c609719bSwdenk--------------------------- 6132c609719bSwdenk 6133c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 6134c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 6135c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 6136c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 6137c609719bSwdenkis not initialized as zero. To be able to get a C environment working 6138c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 6139c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 6140c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 6141c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 6142c609719bSwdenklocked as (mis-) used as memory, etc. 6143c609719bSwdenk 61447152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 61450668236bSWolfgang Denk U-Boot mailing list: 614643d9616cSwdenk 614743d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 614843d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 614943d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 615043d9616cSwdenk ... 615143d9616cSwdenk 615243d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 615343d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 615443d9616cSwdenk require any physical RAM backing up the cache. The cleverness 615543d9616cSwdenk is that the cache is being used as a temporary supply of 615643d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 615711ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 615843d9616cSwdenk can see how this works by studying the cache architecture and 615943d9616cSwdenk operation in the architecture and processor-specific manuals. 616043d9616cSwdenk 616143d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 616243d9616cSwdenk is another option for the system designer to use as an 616311ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 616443d9616cSwdenk option should work for you. Using CS 4 should be fine if your 616543d9616cSwdenk board designers haven't used it for something that would 616643d9616cSwdenk cause you grief during the initial boot! It is frequently not 616743d9616cSwdenk used. 616843d9616cSwdenk 61696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 617043d9616cSwdenk with your processor/board/system design. The default value 617143d9616cSwdenk you will find in any recent u-boot distribution in 61728a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 617343d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 617443d9616cSwdenk it above 400_0000. Just make sure your board has no resources 617543d9616cSwdenk that are supposed to respond to that address! That code in 617643d9616cSwdenk start.S has been around a while and should work as is when 617743d9616cSwdenk you get the config right. 617843d9616cSwdenk 617943d9616cSwdenk -Chris Hallinan 618043d9616cSwdenk DS4.COM, Inc. 618143d9616cSwdenk 6182c609719bSwdenkIt is essential to remember this, since it has some impact on the C 6183c609719bSwdenkcode for the initialization procedures: 6184c609719bSwdenk 6185c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 6186c609719bSwdenk to write it. 6187c609719bSwdenk 618811ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 6189c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 61907152b1d0Swdenk zation is performed later (when relocating to RAM). 6191c609719bSwdenk 6192c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 6193c609719bSwdenk that. 6194c609719bSwdenk 6195c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 6196c609719bSwdenknormal global data to share information beween the code. But it 6197c609719bSwdenkturned out that the implementation of U-Boot can be greatly 6198c609719bSwdenksimplified by making a global data structure (gd_t) available to all 6199c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 6200c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 6201c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 6202c609719bSwdenkplace a pointer (gd) to the global data into a register which we 6203c609719bSwdenkreserve for this purpose. 6204c609719bSwdenk 62057152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 6206c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 6207c609719bSwdenkGCC's implementation. 6208c609719bSwdenk 6209c609719bSwdenkFor PowerPC, the following registers have specific use: 6210c609719bSwdenk R1: stack pointer 6211e7670f6cSWolfgang Denk R2: reserved for system use 6212c609719bSwdenk R3-R4: parameter passing and return values 6213c609719bSwdenk R5-R10: parameter passing 6214c609719bSwdenk R13: small data area pointer 6215c609719bSwdenk R30: GOT pointer 6216c609719bSwdenk R31: frame pointer 6217c609719bSwdenk 6218e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 6219e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 6220e6bee808SJoakim Tjernlund going back and forth between asm and C) 6221c609719bSwdenk 6222e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 6223c609719bSwdenk 6224c609719bSwdenk Note: on PPC, we could use a static initializer (since the 6225c609719bSwdenk address of the global data structure is known at compile time), 6226c609719bSwdenk but it turned out that reserving a register results in somewhat 6227c609719bSwdenk smaller code - although the code savings are not that big (on 6228c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 6229c609719bSwdenk 624 text + 127 data). 6230c609719bSwdenk 6231c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 62324c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 62334c58eb55SMike Frysinger 6234c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 62354c58eb55SMike Frysinger 6236c609719bSwdenkOn ARM, the following registers are used: 6237c609719bSwdenk 6238c609719bSwdenk R0: function argument word/integer result 6239c609719bSwdenk R1-R3: function argument word 624012eba1b4SJeroen Hofstee R9: platform specific 624112eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 6242c609719bSwdenk R11: argument (frame) pointer 6243c609719bSwdenk R12: temporary workspace 6244c609719bSwdenk R13: stack pointer 6245c609719bSwdenk R14: link register 6246c609719bSwdenk R15: program counter 6247c609719bSwdenk 624812eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 624912eba1b4SJeroen Hofstee 625012eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 6251c609719bSwdenk 62520df01fd3SThomas ChouOn Nios II, the ABI is documented here: 62530df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 62540df01fd3SThomas Chou 62550df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 62560df01fd3SThomas Chou 62570df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 62580df01fd3SThomas Chou to access small data sections, so gp is free. 62590df01fd3SThomas Chou 6260afc1ce82SMacpaul LinOn NDS32, the following registers are used: 6261afc1ce82SMacpaul Lin 6262afc1ce82SMacpaul Lin R0-R1: argument/return 6263afc1ce82SMacpaul Lin R2-R5: argument 6264afc1ce82SMacpaul Lin R15: temporary register for assembler 6265afc1ce82SMacpaul Lin R16: trampoline register 6266afc1ce82SMacpaul Lin R28: frame pointer (FP) 6267afc1ce82SMacpaul Lin R29: global pointer (GP) 6268afc1ce82SMacpaul Lin R30: link register (LP) 6269afc1ce82SMacpaul Lin R31: stack pointer (SP) 6270afc1ce82SMacpaul Lin PC: program counter (PC) 6271afc1ce82SMacpaul Lin 6272afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 6273afc1ce82SMacpaul Lin 6274d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 6275d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 6276c609719bSwdenk 6277c609719bSwdenkMemory Management: 6278c609719bSwdenk------------------ 6279c609719bSwdenk 6280c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 6281c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 6282c609719bSwdenk 6283c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 6284c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 6285c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 6286c609719bSwdenkphysical memory banks. 6287c609719bSwdenk 6288c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 6289c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 6290c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 6291c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 62926d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 6293c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 6294c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 6295c609719bSwdenk 6296c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 6297c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 6298c609719bSwdenk 6299c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 6300c609719bSwdenkthis: 6301c609719bSwdenk 6302c609719bSwdenk 0x0000 0000 Exception Vector code 6303c609719bSwdenk : 6304c609719bSwdenk 0x0000 1FFF 6305c609719bSwdenk 0x0000 2000 Free for Application Use 6306c609719bSwdenk : 6307c609719bSwdenk : 6308c609719bSwdenk 6309c609719bSwdenk : 6310c609719bSwdenk : 6311c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 6312c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 6313c609719bSwdenk 0x00FC 0000 Malloc Arena 6314c609719bSwdenk : 6315c609719bSwdenk 0x00FD FFFF 6316c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 6317c609719bSwdenk ... eventually: LCD or video framebuffer 6318c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 6319c609719bSwdenk 0x00FF FFFF [End of RAM] 6320c609719bSwdenk 6321c609719bSwdenk 6322c609719bSwdenkSystem Initialization: 6323c609719bSwdenk---------------------- 6324c609719bSwdenk 6325c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 632611ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 6327c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 63287152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 6329c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 6330c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 6331c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 6332c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 6333c609719bSwdenkthe caches and the SIU. 6334c609719bSwdenk 6335c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 6336c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 6337c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 6338c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 6339c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 6340c609719bSwdenksimple memory test is run that determines the size of the SDRAM 6341c609719bSwdenkbanks. 6342c609719bSwdenk 6343c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 63447152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 6345c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 6346c609719bSwdenk0x00000000, with any additional banks following immediately to create 6347c609719bSwdenkcontiguous memory starting from 0. 6348c609719bSwdenk 6349c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 6350c609719bSwdenkand allocates memory for use by malloc() and for the global Board 6351c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 6352c609719bSwdenkpages, and the final stack is set up. 6353c609719bSwdenk 6354c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 6355c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 6356c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 6357c609719bSwdenknew address in RAM. 6358c609719bSwdenk 6359c609719bSwdenk 6360c609719bSwdenkU-Boot Porting Guide: 6361c609719bSwdenk---------------------- 6362c609719bSwdenk 6363c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 63646aff3115Swdenklist, October 2002] 6365c609719bSwdenk 6366c609719bSwdenk 6367c609719bSwdenkint main(int argc, char *argv[]) 6368c609719bSwdenk{ 6369c609719bSwdenk sighandler_t no_more_time; 6370c609719bSwdenk 6371c609719bSwdenk signal(SIGALRM, no_more_time); 6372c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6373c609719bSwdenk 6374c609719bSwdenk if (available_money > available_manpower) { 63756c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6376c609719bSwdenk return 0; 6377c609719bSwdenk } 6378c609719bSwdenk 6379c609719bSwdenk Download latest U-Boot source; 6380c609719bSwdenk 63810668236bSWolfgang Denk Subscribe to u-boot mailing list; 63826aff3115Swdenk 63836c3fef28SJerry Van Baren if (clueless) 6384c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6385c609719bSwdenk 6386c609719bSwdenk while (learning) { 6387c609719bSwdenk Read the README file in the top level directory; 63887cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 63896c3fef28SJerry Van Baren Read applicable doc/*.README; 6390c609719bSwdenk Read the source, Luke; 63916c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6392c609719bSwdenk } 6393c609719bSwdenk 63946c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 63956c3fef28SJerry Van Baren Buy a BDI3000; 63966c3fef28SJerry Van Baren else 6397c609719bSwdenk Add a lot of aggravation and time; 6398c609719bSwdenk 63996c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 64006c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 64016c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 64026c3fef28SJerry Van Baren } else { 6403c609719bSwdenk Create your own board support subdirectory; 64046c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 64056c3fef28SJerry Van Baren } 64066c3fef28SJerry Van Baren Edit new board/<myboard> files 64076c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6408c609719bSwdenk 64096c3fef28SJerry Van Baren while (!accepted) { 6410c609719bSwdenk while (!running) { 6411c609719bSwdenk do { 6412c609719bSwdenk Add / modify source code; 6413c609719bSwdenk } until (compiles); 6414c609719bSwdenk Debug; 6415c609719bSwdenk if (clueless) 6416c609719bSwdenk email("Hi, I am having problems..."); 6417c609719bSwdenk } 64186c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 64196c3fef28SJerry Van Baren if (reasonable critiques) 64206c3fef28SJerry Van Baren Incorporate improvements from email list code review; 64216c3fef28SJerry Van Baren else 64226c3fef28SJerry Van Baren Defend code as written; 64236c3fef28SJerry Van Baren } 6424c609719bSwdenk 6425c609719bSwdenk return 0; 6426c609719bSwdenk} 6427c609719bSwdenk 6428c609719bSwdenkvoid no_more_time (int sig) 6429c609719bSwdenk{ 6430c609719bSwdenk hire_a_guru(); 6431c609719bSwdenk} 6432c609719bSwdenk 6433c609719bSwdenk 6434c609719bSwdenkCoding Standards: 6435c609719bSwdenk----------------- 6436c609719bSwdenk 6437c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 64382c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 64397ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6440c609719bSwdenk 64412c051651SDetlev ZundelSource files originating from a different project (for example the 64422c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 64432c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 64442c051651SDetlev Zundelsources. 64452c051651SDetlev Zundel 64462c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 64472c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 64482c051651SDetlev Zundelin your code. 6449c609719bSwdenk 6450c178d3daSwdenkPlease also stick to the following formatting rules: 6451180d3f74Swdenk- remove any trailing white space 64527ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6453180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 64547ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6455180d3f74Swdenk- do not add trailing empty lines to source files 6456180d3f74Swdenk 6457c609719bSwdenkSubmissions which do not conform to the standards may be returned 6458c609719bSwdenkwith a request to reformat the changes. 6459c609719bSwdenk 6460c609719bSwdenk 6461c609719bSwdenkSubmitting Patches: 6462c609719bSwdenk------------------- 6463c609719bSwdenk 6464c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6465c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6466c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6467c609719bSwdenk 64680d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6469218ca724SWolfgang Denk 64700668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 64710668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 64720668236bSWolfgang Denk 6473c609719bSwdenkWhen you send a patch, please include the following information with 6474c609719bSwdenkit: 6475c609719bSwdenk 6476c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6477c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6478c609719bSwdenk patch actually fixes something. 6479c609719bSwdenk 6480c609719bSwdenk* For new features: a description of the feature and your 6481c609719bSwdenk implementation. 6482c609719bSwdenk 6483c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6484c609719bSwdenk 6485c609719bSwdenk* For major contributions, your entry to the CREDITS file 6486c609719bSwdenk 648727af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 648827af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6489c609719bSwdenk 6490c609719bSwdenk* If your patch adds new configuration options, don't forget to 6491c609719bSwdenk document these in the README file. 6492c609719bSwdenk 6493218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6494218ca724SWolfgang Denk recommended) you can easily generate the patch using the 64957ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6496218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6497218ca724SWolfgang Denk with some other mail clients. 6498c609719bSwdenk 6499218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6500218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6501218ca724SWolfgang Denk GNU diff. 65026dff5529Swdenk 6503218ca724SWolfgang Denk The current directory when running this command shall be the parent 6504218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6505218ca724SWolfgang Denk your patch includes sufficient directory information for the 6506218ca724SWolfgang Denk affected files). 6507218ca724SWolfgang Denk 6508218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6509218ca724SWolfgang Denk and compressed attachments must not be used. 6510c609719bSwdenk 651152f52c14Swdenk* If one logical set of modifications affects or creates several 651252f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 651352f52c14Swdenk 651452f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 651552f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 651652f52c14Swdenk 651752f52c14Swdenk 6518c609719bSwdenkNotes: 6519c609719bSwdenk 6520c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6521c609719bSwdenk source tree and make sure that no errors or warnings are reported 6522c609719bSwdenk for any of the boards. 6523c609719bSwdenk 6524c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6525c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6526c609719bSwdenk returned with a request to re-formatting / split it. 6527c609719bSwdenk 6528c609719bSwdenk* If you modify existing code, make sure that your new code does not 6529c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6530c609719bSwdenk When adding new features, these should compile conditionally only 6531c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6532c609719bSwdenk disabled must not need more memory than the old code without your 6533c609719bSwdenk modification. 653490dc6704Swdenk 65350668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 65360668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 65370668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 65380668236bSWolfgang Denk bigger than the size limit should be avoided. 6539