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 27575b3c3aaSSimon GlassSee board/sandbox/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 5410b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5430b953ffcSMarkus Klotzbuecher 5440b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5450b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5460b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5470b953ffcSMarkus Klotzbuecher 5486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5490b953ffcSMarkus Klotzbuecher 5500b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5510b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5520b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5530b953ffcSMarkus Klotzbuecher by this value. 5540b953ffcSMarkus Klotzbuecher 55592bbd64eSDaniel Schwierzeck- MIPS CPU options: 55692bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 55792bbd64eSDaniel Schwierzeck 55892bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 55992bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 56092bbd64eSDaniel Schwierzeck relocation. 56192bbd64eSDaniel Schwierzeck 56292bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 56392bbd64eSDaniel Schwierzeck 56492bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 56592bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 56692bbd64eSDaniel Schwierzeck Possible values are: 56792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 56892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 56992bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 57092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 57192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 57292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 57392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 57492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 57592bbd64eSDaniel Schwierzeck 57692bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 57792bbd64eSDaniel Schwierzeck 57892bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 57992bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 58092bbd64eSDaniel Schwierzeck 58192bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 58292bbd64eSDaniel Schwierzeck 58392bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 58492bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 58592bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 58692bbd64eSDaniel Schwierzeck 587b67d8816SChristian Riesch- ARM options: 588b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 589b67d8816SChristian Riesch 590b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 591b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 592b67d8816SChristian Riesch 5935356f545SAneesh V CONFIG_SYS_THUMB_BUILD 5945356f545SAneesh V 5955356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 5965356f545SAneesh V set for ARM architectures. Thumb instruction set provides 5975356f545SAneesh V better code density. For ARM architectures that support 5985356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 5995356f545SAneesh V GCC. 6005356f545SAneesh V 601c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 6020678587fSStephen Warren CONFIG_ARM_ERRATA_742230 6030678587fSStephen Warren CONFIG_ARM_ERRATA_743622 6040678587fSStephen Warren CONFIG_ARM_ERRATA_751472 605f71cbfe3SNitin Garg CONFIG_ARM_ERRATA_794072 606b7588e3bSNitin Garg CONFIG_ARM_ERRATA_761320 6070678587fSStephen Warren 6080678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 6090678587fSStephen Warren during U-Boot startup. Note that these options force the 6100678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 6110678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 6120678587fSStephen Warren set these options unless they apply! 6130678587fSStephen Warren 614795659dcSStephen Warren- CPU timer options: 615795659dcSStephen Warren CONFIG_SYS_HZ 616795659dcSStephen Warren 617795659dcSStephen Warren The frequency of the timer returned by get_timer(). 618795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 619795659dcSStephen Warren option must be set to 1000. 620795659dcSStephen Warren 6215da627a4Swdenk- Linux Kernel Interface: 622c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 623c609719bSwdenk 624c609719bSwdenk U-Boot stores all clock information in Hz 625c609719bSwdenk internally. For binary compatibility with older Linux 626c609719bSwdenk kernels (which expect the clocks passed in the 627c609719bSwdenk bd_info data to be in MHz) the environment variable 628c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 629c609719bSwdenk converts clock data to MHZ before passing it to the 630c609719bSwdenk Linux kernel. 631c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 632c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 633c609719bSwdenk default environment. 634c609719bSwdenk 6355da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6365da627a4Swdenk 63711ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6385da627a4Swdenk expect it to be in bytes, others in MB. 6395da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6405da627a4Swdenk 641fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 642f57f70aaSWolfgang Denk 643f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 644213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 645213bf8c8SGerald Van Baren concepts). 646213bf8c8SGerald Van Baren 647213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 648213bf8c8SGerald Van Baren * New libfdt-based support 649213bf8c8SGerald Van Baren * Adds the "fdt" command 6503bb342fcSKim Phillips * The bootm command automatically updates the fdt 651213bf8c8SGerald Van Baren 652b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 653b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 654b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 655b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 656f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 657c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 658f57f70aaSWolfgang Denk 65911ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 66011ccc33fSMarcel Ziswiler addresses 6613bb342fcSKim Phillips 6624e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6634e253137SKumar Gala 6644e253137SKumar Gala Board code has addition modification that it wants to make 6654e253137SKumar Gala to the flat device tree before handing it off to the kernel 6666705d81eSwdenk 6670267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6680267768eSMatthew McClintock 66911ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6700267768eSMatthew McClintock param header, the default value is zero if undefined. 6710267768eSMatthew McClintock 6723887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6733887c3fbSHeiko Schocher 6743887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6753887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6763887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6773887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6783887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6793887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6803887c3fbSHeiko Schocher 6817eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6827eb29398SIgor Grinberg 6837eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6847eb29398SIgor Grinberg machine type and must be used to specify the machine type 6857eb29398SIgor Grinberg number as it appears in the ARM machine registry 6867eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6877eb29398SIgor Grinberg Only boards that have multiple machine types supported 6887eb29398SIgor Grinberg in a single configuration file and the machine type is 6897eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6907eb29398SIgor Grinberg 6910b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6920b2f4ecaSNiklaus Giger 6930b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6940b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 6950b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6960b2f4ecaSNiklaus Giger 6970b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 6980b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 6990b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 7000b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 7010b2f4ecaSNiklaus Giger 7020b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 7030b2f4ecaSNiklaus Giger 7040b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 7050b2f4ecaSNiklaus Giger 7060b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 7070b2f4ecaSNiklaus Giger the defaults discussed just above. 7080b2f4ecaSNiklaus Giger 7092c451f78SAneesh V- Cache Configuration: 7102c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 7112c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 7122c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 7132c451f78SAneesh V 71493bc2193SAneesh V- Cache Configuration for ARM: 71593bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 71693bc2193SAneesh V controller 71793bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 71893bc2193SAneesh V controller register space 71993bc2193SAneesh V 7206705d81eSwdenk- Serial Ports: 72148d0192fSAndreas Engel CONFIG_PL010_SERIAL 7226705d81eSwdenk 7236705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 7246705d81eSwdenk 72548d0192fSAndreas Engel CONFIG_PL011_SERIAL 7266705d81eSwdenk 7276705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 7286705d81eSwdenk 7296705d81eSwdenk CONFIG_PL011_CLOCK 7306705d81eSwdenk 7316705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 7326705d81eSwdenk the clock speed of the UARTs. 7336705d81eSwdenk 7346705d81eSwdenk CONFIG_PL01x_PORTS 7356705d81eSwdenk 7366705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 7376705d81eSwdenk define this to a list of base addresses for each (supported) 7386705d81eSwdenk port. See e.g. include/configs/versatile.h 7396705d81eSwdenk 740910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 741910f1ae3SJohn Rigby 742910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 743910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 744910f1ae3SJohn Rigby this variable to initialize the extra register. 745910f1ae3SJohn Rigby 746910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 747910f1ae3SJohn Rigby 748910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 749910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 750910f1ae3SJohn Rigby variable to flush the UART at init time. 751910f1ae3SJohn Rigby 752d57dee57SKaricheri, Muralidharan CONFIG_SERIAL_HW_FLOW_CONTROL 753d57dee57SKaricheri, Muralidharan 754d57dee57SKaricheri, Muralidharan Define this variable to enable hw flow control in serial driver. 755d57dee57SKaricheri, Muralidharan Current user of this option is drivers/serial/nsl16550.c driver 7566705d81eSwdenk 757c609719bSwdenk- Console Interface: 758c609719bSwdenk Depending on board, define exactly one serial port 759c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 760c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 761c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 762c609719bSwdenk 763c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 764c609719bSwdenk port routines must be defined elsewhere 765c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 766c609719bSwdenk 767c609719bSwdenk CONFIG_CFB_CONSOLE 768c609719bSwdenk Enables console device for a color framebuffer. Needs following 769c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 770c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 771c609719bSwdenk (default big endian) 772c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 773c609719bSwdenk rectangle fill 774c609719bSwdenk (cf. smiLynxEM) 775c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 776c609719bSwdenk bit-blit (cf. smiLynxEM) 777c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 778c609719bSwdenk (cols=pitch) 779c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 780c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 781c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 782c609719bSwdenk (0-5, cf. cfb_console.c) 783c609719bSwdenk VIDEO_FB_ADRS framebuffer address 784c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 785c609719bSwdenk (i.e. i8042_kbd_init()) 786c609719bSwdenk VIDEO_TSTC_FCT test char fct 787c609719bSwdenk (i.e. i8042_tstc) 788c609719bSwdenk VIDEO_GETC_FCT get char fct 789c609719bSwdenk (i.e. i8042_getc) 790c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 791c609719bSwdenk (requires blink timer 792c609719bSwdenk cf. i8042.c) 7936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 794c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 795c609719bSwdenk upper right corner 796602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 797c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 798c609719bSwdenk upper left corner 799a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 800a6c7ad2fSwdenk linux_logo.h for logo. 801a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 802c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 80311ccc33fSMarcel Ziswiler additional board info beside 804c609719bSwdenk the logo 805c609719bSwdenk 80633a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 80733a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 80833a35bbbSPali Rohár erase functions and limited graphics rendition control). 80933a35bbbSPali Rohár 810c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 811c609719bSwdenk default i/o. Serial console can be forced with 812c609719bSwdenk environment 'console=serial'. 813c609719bSwdenk 814a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 815a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 816a3ad8e26Swdenk the "silent" environment variable. See 817a3ad8e26Swdenk doc/README.silent for more information. 818a3ad8e26Swdenk 81945ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 82045ae2546SHeiko Schocher is 0x00. 82145ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 82245ae2546SHeiko Schocher is 0xa0. 82345ae2546SHeiko Schocher 824c609719bSwdenk- Console Baudrate: 825c609719bSwdenk CONFIG_BAUDRATE - in bps 826c609719bSwdenk Select one of the baudrates listed in 8276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 8286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 829c609719bSwdenk 830c92fac91SHeiko Schocher- Console Rx buffer length 831c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 832c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 8332b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 834c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 835c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 836c92fac91SHeiko Schocher the SMC. 837c92fac91SHeiko Schocher 8389558b48aSGraeme Russ- Pre-Console Buffer: 8399558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 8409558b48aSGraeme Russ initialised etc) all console output is silently discarded. 8419558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8429558b48aSGraeme Russ buffer any console messages prior to the console being 8439558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8449558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8459558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8469558b48aSGraeme Russ bytes are output before the console is initialised, the 8479558b48aSGraeme Russ earlier bytes are discarded. 8489558b48aSGraeme Russ 8499558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8509558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8519558b48aSGraeme Russ 852046a37bdSSonny Rao- Safe printf() functions 853046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 854046a37bdSSonny Rao the printf() functions. These are defined in 855046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 856046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 857046a37bdSSonny Rao If this option is not given then these functions will 858046a37bdSSonny Rao silently discard their buffer size argument - this means 859046a37bdSSonny Rao you are not getting any overflow checking in this case. 860046a37bdSSonny Rao 861c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 862c609719bSwdenk Delay before automatically booting the default image; 863c609719bSwdenk set to -1 to disable autoboot. 86493d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 86593d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 866c609719bSwdenk 867c609719bSwdenk See doc/README.autoboot for these options that 868c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 869c609719bSwdenk CONFIG_BOOT_RETRY_TIME 870c609719bSwdenk CONFIG_BOOT_RETRY_MIN 871c609719bSwdenk CONFIG_AUTOBOOT_KEYED 872c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 873c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 874c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 875c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 876c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 877c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 878c609719bSwdenk CONFIG_RESET_TO_RETRY 879c609719bSwdenk 880c609719bSwdenk- Autoboot Command: 881c609719bSwdenk CONFIG_BOOTCOMMAND 882c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 883c609719bSwdenk define a command string that is automatically executed 884c609719bSwdenk when no character is read on the console interface 885c609719bSwdenk within "Boot Delay" after reset. 886c609719bSwdenk 887c609719bSwdenk CONFIG_BOOTARGS 888c609719bSwdenk This can be used to pass arguments to the bootm 889c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 890c609719bSwdenk environment value "bootargs". 891c609719bSwdenk 892c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 893c609719bSwdenk The value of these goes into the environment as 894c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 895c609719bSwdenk as a convenience, when switching between booting from 89611ccc33fSMarcel Ziswiler RAM and NFS. 897c609719bSwdenk 898eda0ba38SHeiko Schocher- Bootcount: 899eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 900eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 901eda0ba38SHeiko Schocher cycle, see: 902eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 903eda0ba38SHeiko Schocher 904eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 905eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 906eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 907eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 908eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 909eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 910eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 911eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 912eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 913eda0ba38SHeiko Schocher 914c609719bSwdenk- Pre-Boot Commands: 915c609719bSwdenk CONFIG_PREBOOT 916c609719bSwdenk 917c609719bSwdenk When this option is #defined, the existence of the 918c609719bSwdenk environment variable "preboot" will be checked 919c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 920c609719bSwdenk countdown and/or running the auto-boot command resp. 921c609719bSwdenk entering interactive mode. 922c609719bSwdenk 923c609719bSwdenk This feature is especially useful when "preboot" is 924c609719bSwdenk automatically generated or modified. For an example 925c609719bSwdenk see the LWMON board specific code: here "preboot" is 926c609719bSwdenk modified when the user holds down a certain 927c609719bSwdenk combination of keys on the (special) keyboard when 928c609719bSwdenk booting the systems 929c609719bSwdenk 930c609719bSwdenk- Serial Download Echo Mode: 931c609719bSwdenk CONFIG_LOADS_ECHO 932c609719bSwdenk If defined to 1, all characters received during a 933c609719bSwdenk serial download (using the "loads" command) are 934c609719bSwdenk echoed back. This might be needed by some terminal 935c609719bSwdenk emulations (like "cu"), but may as well just take 936c609719bSwdenk time on others. This setting #define's the initial 937c609719bSwdenk value of the "loads_echo" environment variable. 938c609719bSwdenk 939602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 940c609719bSwdenk CONFIG_KGDB_BAUDRATE 941c609719bSwdenk Select one of the baudrates listed in 9426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 943c609719bSwdenk 944c609719bSwdenk- Monitor Functions: 945602ad3b3SJon Loeliger Monitor commands can be included or excluded 946602ad3b3SJon Loeliger from the build by using the #include files 947c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 948c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 949602ad3b3SJon Loeliger and augmenting with additional #define's 950602ad3b3SJon Loeliger for wanted commands. 951c609719bSwdenk 952602ad3b3SJon Loeliger The default command configuration includes all commands 953602ad3b3SJon Loeliger except those marked below with a "*". 954602ad3b3SJon Loeliger 955b401b73dSMarek Vasut CONFIG_CMD_AES AES 128 CBC encrypt/decrypt 956602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 957602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 958602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 959602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 960602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 961602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 962d2b2ffe3STom Rini CONFIG_CMD_BOOTI * ARM64 Linux kernel Image support 963602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 96408d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 965602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 966710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 967602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 968602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 969602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 970a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 971a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 972a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 973a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 974602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 975602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 976246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 977602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 978602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9795e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 980fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 98188733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9820c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 98303e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 98403e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 98516f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 98616f4d933SStephen Warren that work for multiple fs types 987bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 988602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 98903e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 990602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 991602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9924d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 99353fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 994a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 995a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 996bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 997602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 998602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 999602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 1000602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 10018fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 10024d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 1003602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 1004aa53233aSSimon Glass CONFIG_CMD_IOTRACE * I/O tracing for debugging 10050c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 1006c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 1007602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 1008602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 1009602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 1010602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 10114d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 1012d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 1013d22c338eSJoe Hershberger (169.254.*.*) 1014602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 1015602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 10164d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 101702c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 101815a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1019602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1020a2681707SWolfgang Denk loop, loopw 10214d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1022602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1023602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1024602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 102568d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1026602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1027602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10284d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1029e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1030e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1031602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1032602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1033602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1034602ad3b3SJon Loeliger host 1035602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1036ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1037602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1038602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1039d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1040602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1041602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1042602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1043602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1044602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1045602ad3b3SJon Loeliger (4xx only) 1046f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10474d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 104802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10497d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 105074de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1051602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10527a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10531fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1054da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1055da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1056602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1057602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1058c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10594d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 106089c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1061c609719bSwdenk 1062c609719bSwdenk EXAMPLE: If you want all functions except of network 1063c609719bSwdenk support you can write: 1064c609719bSwdenk 1065602ad3b3SJon Loeliger #include "config_cmd_all.h" 1066602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1067c609719bSwdenk 1068213bf8c8SGerald Van Baren Other Commands: 1069213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1070c609719bSwdenk 1071c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1072602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1073c609719bSwdenk what you (and your U-Boot users) are doing. Data 1074c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1075c609719bSwdenk 8260 (where accesses to the IMMR region must be 1076c609719bSwdenk uncached), and it cannot be disabled on all other 1077c609719bSwdenk systems where we (mis-) use the data cache to hold an 1078c609719bSwdenk initial stack and some data. 1079c609719bSwdenk 1080c609719bSwdenk 1081c609719bSwdenk XXX - this list needs to get updated! 1082c609719bSwdenk 1083a5ecbe62SWolfgang Denk- Regular expression support: 1084a5ecbe62SWolfgang Denk CONFIG_REGEX 1085a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1086a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1087a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1088a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1089a5ecbe62SWolfgang Denk 109045ba8077SSimon Glass- Device tree: 109145ba8077SSimon Glass CONFIG_OF_CONTROL 109245ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 109345ba8077SSimon Glass to configure its devices, instead of relying on statically 109445ba8077SSimon Glass compiled #defines in the board file. This option is 109545ba8077SSimon Glass experimental and only available on a few boards. The device 109645ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 109745ba8077SSimon Glass 10982c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10992c0f79e4SSimon Glass be done using one of the two options below: 1100bbb0b128SSimon Glass 1101bbb0b128SSimon Glass CONFIG_OF_EMBED 1102bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1103bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1104bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1105bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1106bbb0b128SSimon Glass the global data structure as gd->blob. 110745ba8077SSimon Glass 11082c0f79e4SSimon Glass CONFIG_OF_SEPARATE 11092c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 11102c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 11112c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 11122c0f79e4SSimon Glass 11132c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 11142c0f79e4SSimon Glass 11152c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 11162c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 11172c0f79e4SSimon Glass still use the individual files if you need something more 11182c0f79e4SSimon Glass exotic. 11192c0f79e4SSimon Glass 1120c609719bSwdenk- Watchdog: 1121c609719bSwdenk CONFIG_WATCHDOG 1122c609719bSwdenk If this variable is defined, it enables watchdog 11236abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11246abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11256abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11266abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11276abe6fb6SDetlev Zundel available, then no further board specific code should 11286abe6fb6SDetlev Zundel be needed to use it. 11296abe6fb6SDetlev Zundel 11306abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11316abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11326abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11336abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1134c609719bSwdenk 1135c1551ea8Sstroese- U-Boot Version: 1136c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1137c1551ea8Sstroese If this variable is defined, an environment variable 1138c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1139c1551ea8Sstroese version as printed by the "version" command. 1140a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1141a1ea8e51SBenoît Thébaudeau next reset. 1142c1551ea8Sstroese 1143c609719bSwdenk- Real-Time Clock: 1144c609719bSwdenk 1145602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1146c609719bSwdenk has to be selected, too. Define exactly one of the 1147c609719bSwdenk following options: 1148c609719bSwdenk 1149c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1150c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11514e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1152c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11531cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1154c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11557f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 1156412921d2SMarkus Niebel CONFIG_RTC_DS1339 - use Maxim, Inc. DS1339 RTC 11573bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11589536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11594c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 116171d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 116271d19f30SHeiko Schocher RV3029 RTC. 1163c609719bSwdenk 1164b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1165b37c7e5eSwdenk must also be configured. See I2C Support, below. 1166b37c7e5eSwdenk 1167e92739d3SPeter Tyser- GPIO Support: 1168e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1169e92739d3SPeter Tyser 11705dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11715dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11725dec49caSChris Packham pins supported by a particular chip. 11735dec49caSChris Packham 1174e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1175e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1176e92739d3SPeter Tyser 1177aa53233aSSimon Glass- I/O tracing: 1178aa53233aSSimon Glass When CONFIG_IO_TRACE is selected, U-Boot intercepts all I/O 1179aa53233aSSimon Glass accesses and can checksum them or write a list of them out 1180aa53233aSSimon Glass to memory. See the 'iotrace' command for details. This is 1181aa53233aSSimon Glass useful for testing device drivers since it can confirm that 1182aa53233aSSimon Glass the driver behaves the same way before and after a code 1183aa53233aSSimon Glass change. Currently this is supported on sandbox and arm. To 1184aa53233aSSimon Glass add support for your architecture, add '#include <iotrace.h>' 1185aa53233aSSimon Glass to the bottom of arch/<arch>/include/asm/io.h and test. 1186aa53233aSSimon Glass 1187aa53233aSSimon Glass Example output from the 'iotrace stats' command is below. 1188aa53233aSSimon Glass Note that if the trace buffer is exhausted, the checksum will 1189aa53233aSSimon Glass still continue to operate. 1190aa53233aSSimon Glass 1191aa53233aSSimon Glass iotrace is enabled 1192aa53233aSSimon Glass Start: 10000000 (buffer start address) 1193aa53233aSSimon Glass Size: 00010000 (buffer size) 1194aa53233aSSimon Glass Offset: 00000120 (current buffer offset) 1195aa53233aSSimon Glass Output: 10000120 (start + offset) 1196aa53233aSSimon Glass Count: 00000018 (number of trace records) 1197aa53233aSSimon Glass CRC32: 9526fb66 (CRC32 of all trace records) 1198aa53233aSSimon Glass 1199c609719bSwdenk- Timestamp Support: 1200c609719bSwdenk 1201c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1202c609719bSwdenk (date and time) of an image is printed by image 1203c609719bSwdenk commands like bootm or iminfo. This option is 1204602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1205c609719bSwdenk 1206923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1207923c46f9SKarl O. Pinc Zero or more of the following: 1208923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1209923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1210923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1211923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1212923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1213923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1214923c46f9SKarl O. Pinc disk/part_efi.c 1215923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1216c609719bSwdenk 1217602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1218218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1219923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1220c609719bSwdenk 1221c609719bSwdenk- IDE Reset method: 12224d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 12234d13cbadSwdenk board configurations files but used nowhere! 1224c609719bSwdenk 12254d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 12264d13cbadSwdenk be performed by calling the function 12274d13cbadSwdenk ide_set_reset(int reset) 12284d13cbadSwdenk which has to be defined in a board specific file 1229c609719bSwdenk 1230c609719bSwdenk- ATAPI Support: 1231c609719bSwdenk CONFIG_ATAPI 1232c609719bSwdenk 1233c609719bSwdenk Set this to enable ATAPI support. 1234c609719bSwdenk 1235c40b2956Swdenk- LBA48 Support 1236c40b2956Swdenk CONFIG_LBA48 1237c40b2956Swdenk 1238c40b2956Swdenk Set this to enable support for disks larger than 137GB 12394b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1240c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1241c40b2956Swdenk support disks up to 2.1TB. 1242c40b2956Swdenk 12436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1244c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1245c40b2956Swdenk Default is 32bit. 1246c40b2956Swdenk 1247c609719bSwdenk- SCSI Support: 1248c609719bSwdenk At the moment only there is only support for the 1249c609719bSwdenk SYM53C8XX SCSI controller; define 1250c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1251c609719bSwdenk 12526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1255c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1256c609719bSwdenk devices. 12576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1258c609719bSwdenk 1259447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1260447c031bSStefan Reinauer SCSI devices found during the last scan. 1261447c031bSStefan Reinauer 1262c609719bSwdenk- NETWORK Support (PCI): 1263682011ffSwdenk CONFIG_E1000 1264ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1265ce5207e1SKyle Moffett 1266ce5207e1SKyle Moffett CONFIG_E1000_SPI 1267ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1268ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1269ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1270ce5207e1SKyle Moffett 1271ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1272ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1273ce5207e1SKyle Moffett example with the "sspi" command. 1274ce5207e1SKyle Moffett 1275ce5207e1SKyle Moffett CONFIG_CMD_E1000 1276ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1277ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1278682011ffSwdenk 1279ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 128011ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1281ac3315c2SAndre Schwarz 1282c609719bSwdenk CONFIG_EEPRO100 1283c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 128411ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1285c609719bSwdenk write routine for first time initialisation. 1286c609719bSwdenk 1287c609719bSwdenk CONFIG_TULIP 1288c609719bSwdenk Support for Digital 2114x chips. 1289c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1290c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1291c609719bSwdenk 1292c609719bSwdenk CONFIG_NATSEMI 1293c609719bSwdenk Support for National dp83815 chips. 1294c609719bSwdenk 1295c609719bSwdenk CONFIG_NS8382X 1296c609719bSwdenk Support for National dp8382[01] gigabit chips. 1297c609719bSwdenk 129845219c46Swdenk- NETWORK Support (other): 129945219c46Swdenk 1300c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1301c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1302c041e9d2SJens Scharsig 1303c041e9d2SJens Scharsig CONFIG_RMII 1304c041e9d2SJens Scharsig Define this to use reduced MII inteface 1305c041e9d2SJens Scharsig 1306c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1307c041e9d2SJens Scharsig If this defined, the driver is quiet. 1308c041e9d2SJens Scharsig The driver doen't show link status messages. 1309c041e9d2SJens Scharsig 1310efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1311efdd7319SRob Herring Support for the Calxeda XGMAC device 1312efdd7319SRob Herring 13133bb46d23SAshok CONFIG_LAN91C96 131445219c46Swdenk Support for SMSC's LAN91C96 chips. 131545219c46Swdenk 131645219c46Swdenk CONFIG_LAN91C96_BASE 131745219c46Swdenk Define this to hold the physical address 131845219c46Swdenk of the LAN91C96's I/O space 131945219c46Swdenk 132045219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 132145219c46Swdenk Define this to enable 32 bit addressing 132245219c46Swdenk 13233bb46d23SAshok CONFIG_SMC91111 1324f39748aeSwdenk Support for SMSC's LAN91C111 chip 1325f39748aeSwdenk 1326f39748aeSwdenk CONFIG_SMC91111_BASE 1327f39748aeSwdenk Define this to hold the physical address 1328f39748aeSwdenk of the device (I/O space) 1329f39748aeSwdenk 1330f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1331f39748aeSwdenk Define this if data bus is 32 bits 1332f39748aeSwdenk 1333f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1334f39748aeSwdenk Define this to use i/o functions instead of macros 1335f39748aeSwdenk (some hardware wont work with macros) 1336f39748aeSwdenk 1337dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1338dc02badaSHeiko Schocher Support for davinci emac 1339dc02badaSHeiko Schocher 1340dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1341dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1342dc02badaSHeiko Schocher 1343b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1344b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1345b3dbf4a5SMacpaul Lin 1346b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1347b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1348b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1349b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1350b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1351b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1352b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1353b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1354b3dbf4a5SMacpaul Lin 1355c2fff331SMike Rapoport CONFIG_SMC911X 1356557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1357557b377dSJens Gehrlein 1358c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1359557b377dSJens Gehrlein Define this to hold the physical address 1360557b377dSJens Gehrlein of the device (I/O space) 1361557b377dSJens Gehrlein 1362c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1363557b377dSJens Gehrlein Define this if data bus is 32 bits 1364557b377dSJens Gehrlein 1365c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1366557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1367557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1368c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1369557b377dSJens Gehrlein 13703d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13713d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13723d0075faSYoshihiro Shimoda 13733d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13743d0075faSYoshihiro Shimoda Define the number of ports to be used 13753d0075faSYoshihiro Shimoda 13763d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13773d0075faSYoshihiro Shimoda Define the ETH PHY's address 13783d0075faSYoshihiro Shimoda 137968260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 138068260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 138168260aabSYoshihiro Shimoda 1382b2f97cf2SHeiko Schocher- PWM Support: 1383b2f97cf2SHeiko Schocher CONFIG_PWM_IMX 1384b2f97cf2SHeiko Schocher Support for PWM modul on the imx6. 1385b2f97cf2SHeiko Schocher 13865e124724SVadim Bendebury- TPM Support: 138790899cc0SChe-liang Chiou CONFIG_TPM 138890899cc0SChe-liang Chiou Support TPM devices. 138990899cc0SChe-liang Chiou 13901b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13911b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13921b393db5STom Wai-Hong Tam per system is supported at this time. 13931b393db5STom Wai-Hong Tam 13941b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13951b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13961b393db5STom Wai-Hong Tam 13971b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13981b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13991b393db5STom Wai-Hong Tam 14001b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 14011b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 14021b393db5STom Wai-Hong Tam 1403c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1404c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1405c01939c7SDirk Eibach 140690899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 14075e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 14085e124724SVadim Bendebury per system is supported at this time. 14095e124724SVadim Bendebury 14105e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 14115e124724SVadim Bendebury Base address where the generic TPM device is mapped 14125e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 14135e124724SVadim Bendebury 0xfed40000. 14145e124724SVadim Bendebury 1415be6c1529SReinhard Pfau CONFIG_CMD_TPM 1416be6c1529SReinhard Pfau Add tpm monitor functions. 1417be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1418be6c1529SReinhard Pfau provides monitor access to authorized functions. 1419be6c1529SReinhard Pfau 1420be6c1529SReinhard Pfau CONFIG_TPM 1421be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1422be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1423be6c1529SReinhard Pfau Requires support for a TPM device. 1424be6c1529SReinhard Pfau 1425be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1426be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1427be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1428be6c1529SReinhard Pfau 1429c609719bSwdenk- USB Support: 1430c609719bSwdenk At the moment only the UHCI host controller is 14314d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1432c609719bSwdenk CONFIG_USB_UHCI to enable it. 1433c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 143430d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1435c609719bSwdenk storage devices. 1436c609719bSwdenk Note: 1437c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1438c609719bSwdenk (TEAC FD-05PUB). 14394d13cbadSwdenk MPC5200 USB requires additional defines: 14404d13cbadSwdenk CONFIG_USB_CLOCK 14414d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1442307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1443307ecb6dSEric Millbrandt for USB on PSC3 14444d13cbadSwdenk CONFIG_USB_CONFIG 14454d13cbadSwdenk for differential drivers: 0x00001000 14464d13cbadSwdenk for single ended drivers: 0x00005000 1447307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1448307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1450fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1451fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14524d13cbadSwdenk 14539ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14549ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14559ab4ce22SSimon Glass 145616c8d5e7SWolfgang Denk- USB Device: 145716c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 145816c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 145916c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 146011ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 146116c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 146216c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 146316c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 146416c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 146516c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 146616c8d5e7SWolfgang Denk a Linux host by 146716c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 146816c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 146916c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 147016c8d5e7SWolfgang Denk might be defined in YourBoardName.h 147116c8d5e7SWolfgang Denk 147216c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 147316c8d5e7SWolfgang Denk Define this to build a UDC device 147416c8d5e7SWolfgang Denk 147516c8d5e7SWolfgang Denk CONFIG_USB_TTY 147616c8d5e7SWolfgang Denk Define this to have a tty type of device available to 147716c8d5e7SWolfgang Denk talk to the UDC device 147816c8d5e7SWolfgang Denk 1479f9da0f89SVipin KUMAR CONFIG_USBD_HS 1480f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1481f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1482f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1483f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1484f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1485f9da0f89SVipin KUMAR speed. 1486f9da0f89SVipin KUMAR 14876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 148816c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 148916c8d5e7SWolfgang Denk be set to usbtty. 149016c8d5e7SWolfgang Denk 149116c8d5e7SWolfgang Denk mpc8xx: 14926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 149316c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 149516c8d5e7SWolfgang Denk 14966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 149716c8d5e7SWolfgang Denk Derive USB clock from brgclk 14986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 149916c8d5e7SWolfgang Denk 150016c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 150116c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 150216c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 150316c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 150416c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 150516c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 150616c8d5e7SWolfgang Denk 150716c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 150816c8d5e7SWolfgang Denk Define this string as the name of your company for 150916c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 151016c8d5e7SWolfgang Denk 151116c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 151216c8d5e7SWolfgang Denk Define this string as the name of your product 151316c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 151416c8d5e7SWolfgang Denk 151516c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 151616c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 151716c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 151816c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 151916c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 152016c8d5e7SWolfgang Denk 152116c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 152216c8d5e7SWolfgang Denk Define this as the unique Product ID 152316c8d5e7SWolfgang Denk for your device 152416c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1525c609719bSwdenk 1526d70a560fSIgor Grinberg- ULPI Layer Support: 1527d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1528d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1529d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1530d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1531d70a560fSIgor Grinberg viewport is supported. 1532d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1533d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 15346d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 15356d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 15366d365ea0SLucas Stach the appropriate value in Hz. 1537c609719bSwdenk 1538c609719bSwdenk- MMC Support: 1539c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1540c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1541c609719bSwdenk accessed from the boot prompt by mapping the device 1542c609719bSwdenk to physical memory similar to flash. Command line is 1543602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1544602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1545c609719bSwdenk 1546afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1547afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1548afb35666SYoshihiro Shimoda 1549afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1550afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1551afb35666SYoshihiro Shimoda 1552afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1553afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1554afb35666SYoshihiro Shimoda 15551fd93c6eSPierre Aubert CONFIG_GENERIC_MMC 15561fd93c6eSPierre Aubert Enable the generic MMC driver 15571fd93c6eSPierre Aubert 15581fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_BOOT 15591fd93c6eSPierre Aubert Enable some additional features of the eMMC boot partitions. 15601fd93c6eSPierre Aubert 15611fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_RPMB 15621fd93c6eSPierre Aubert Enable the commands for reading, writing and programming the 15631fd93c6eSPierre Aubert key for the Replay Protection Memory Block partition in eMMC. 15641fd93c6eSPierre Aubert 1565b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1566b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1567b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1568b3ba6e94STom Rini 1569b3ba6e94STom Rini CONFIG_CMD_DFU 1570b3ba6e94STom Rini This enables the command "dfu" which is used to have 1571b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1572b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1573b3ba6e94STom Rini set and define the alt settings to expose to the host. 1574b3ba6e94STom Rini 1575b3ba6e94STom Rini CONFIG_DFU_MMC 1576b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1577b3ba6e94STom Rini 1578c6631764SPantelis Antoniou CONFIG_DFU_NAND 1579c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1580c6631764SPantelis Antoniou 1581a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1582a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1583a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1584a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1585a9479f04SAfzal Mohammed one that would help mostly the developer. 1586a9479f04SAfzal Mohammed 1587e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1588e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1589e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1590e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1591e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1592e7e75c70SHeiko Schocher 1593ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1594ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1595ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1596ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1597ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1598ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1599ea2453d5SPantelis Antoniou 1600001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1601001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1602001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1603001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1604001a8319SHeiko Schocher 1605001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1606001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1607001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1608001a8319SHeiko Schocher sending again an USB request to the device. 1609001a8319SHeiko Schocher 16103aab70afSSebastian Siewior- USB Device Android Fastboot support: 16113aab70afSSebastian Siewior CONFIG_CMD_FASTBOOT 16123aab70afSSebastian Siewior This enables the command "fastboot" which enables the Android 16133aab70afSSebastian Siewior fastboot mode for the platform's USB device. Fastboot is a USB 16143aab70afSSebastian Siewior protocol for downloading images, flashing and device control 16153aab70afSSebastian Siewior used on Android devices. 16163aab70afSSebastian Siewior See doc/README.android-fastboot for more information. 16173aab70afSSebastian Siewior 16183aab70afSSebastian Siewior CONFIG_ANDROID_BOOT_IMAGE 16193aab70afSSebastian Siewior This enables support for booting images which use the Android 16203aab70afSSebastian Siewior image format header. 16213aab70afSSebastian Siewior 16223aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_ADDR 16233aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16243aab70afSSebastian Siewior downloads. Define this to the starting RAM address to use for 16253aab70afSSebastian Siewior downloaded images. 16263aab70afSSebastian Siewior 16273aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_SIZE 16283aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16293aab70afSSebastian Siewior downloads. This buffer should be as large as possible for a 16303aab70afSSebastian Siewior platform. Define this to the size available RAM for fastboot. 16313aab70afSSebastian Siewior 16326705d81eSwdenk- Journaling Flash filesystem support: 16336705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 16346705d81eSwdenk CONFIG_JFFS2_NAND_DEV 16356705d81eSwdenk Define these for a default partition on a NAND device 16366705d81eSwdenk 16376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 16386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 16396705d81eSwdenk Define these for a default partition on a NOR device 16406705d81eSwdenk 16416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 16426705d81eSwdenk Define this to create an own partition. You have to provide a 16436705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 16446705d81eSwdenk 16456705d81eSwdenk If you define only one JFFS2 partition you may also want to 16466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 16476705d81eSwdenk to disable the command chpart. This is the default when you 16486705d81eSwdenk have not defined a custom partition 16496705d81eSwdenk 1650c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1651c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1652656f4c65SDonggeun Kim 1653656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1654656f4c65SDonggeun Kim file in FAT formatted partition. 1655656f4c65SDonggeun Kim 1656656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1657656f4c65SDonggeun Kim user to write files to FAT. 1658c30a15e5SDonggeun Kim 165984cd9327SGabe BlackCBFS (Coreboot Filesystem) support 166084cd9327SGabe Black CONFIG_CMD_CBFS 166184cd9327SGabe Black 166284cd9327SGabe Black Define this to enable support for reading from a Coreboot 166384cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 166484cd9327SGabe Black and cbfsload. 166584cd9327SGabe Black 16664f0d1a2aSSiva Durga Prasad Paladugu- FAT(File Allocation Table) filesystem cluster size: 16674f0d1a2aSSiva Durga Prasad Paladugu CONFIG_FS_FAT_MAX_CLUSTSIZE 16684f0d1a2aSSiva Durga Prasad Paladugu 16694f0d1a2aSSiva Durga Prasad Paladugu Define the max cluster size for fat operations else 16704f0d1a2aSSiva Durga Prasad Paladugu a default value of 65536 will be defined. 16714f0d1a2aSSiva Durga Prasad Paladugu 1672c609719bSwdenk- Keyboard Support: 1673c609719bSwdenk CONFIG_ISA_KEYBOARD 1674c609719bSwdenk 1675c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1676c609719bSwdenk support 1677c609719bSwdenk 1678c609719bSwdenk CONFIG_I8042_KBD 1679c609719bSwdenk Standard PC keyboard driver with US (is default) and 1680c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1681c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1682c609719bSwdenk for cfb_console. Supports cursor blinking. 1683c609719bSwdenk 1684713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1685713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1686713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1687713cb680SHung-ying Tyan which provides key scans on request. 1688713cb680SHung-ying Tyan 1689c609719bSwdenk- Video support: 1690c609719bSwdenk CONFIG_VIDEO 1691c609719bSwdenk 1692c609719bSwdenk Define this to enable video support (for output to 1693c609719bSwdenk video). 1694c609719bSwdenk 1695c609719bSwdenk CONFIG_VIDEO_CT69000 1696c609719bSwdenk 1697c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1698c609719bSwdenk 1699c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1700eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1701eeb1b77bSwdenk video output is selected via environment 'videoout' 1702eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1703eeb1b77bSwdenk assumed. 1704c609719bSwdenk 1705eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 170611ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1707eeb1b77bSwdenk are possible: 1708eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1709eeb1b77bSwdenk Following standard modes are supported (* is default): 1710eeb1b77bSwdenk 1711eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1712eeb1b77bSwdenk -------------+--------------------------------------------- 1713eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1714eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1715eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1716eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1717eeb1b77bSwdenk -------------+--------------------------------------------- 1718c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1719c609719bSwdenk 1720eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 17217817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1722eeb1b77bSwdenk 1723eeb1b77bSwdenk 1724a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1725a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1726a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1727a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1728a6c7ad2fSwdenk 17297d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 17307d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 17317d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 17327d3053fbSTimur Tabi support, and should also define these other macros: 17337d3053fbSTimur Tabi 17347d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 17357d3053fbSTimur Tabi CONFIG_VIDEO 17367d3053fbSTimur Tabi CONFIG_CMD_BMP 17377d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 17387d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 17397d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 17407d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 17417d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 17427d3053fbSTimur Tabi 1743ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1744ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1745ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1746ba8e76bdSTimur Tabi description of this variable. 17477d3053fbSTimur Tabi 1748058d59b0SSimon Glass CONFIG_VIDEO_VGA 1749058d59b0SSimon Glass 1750058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1751058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1752058d59b0SSimon Glass driver. 1753058d59b0SSimon Glass 1754058d59b0SSimon Glass 1755682011ffSwdenk- Keyboard Support: 1756682011ffSwdenk CONFIG_KEYBOARD 1757682011ffSwdenk 1758682011ffSwdenk Define this to enable a custom keyboard support. 1759682011ffSwdenk This simply calls drv_keyboard_init() which must be 1760682011ffSwdenk defined in your board-specific files. 1761682011ffSwdenk The only board using this so far is RBC823. 1762a6c7ad2fSwdenk 1763c609719bSwdenk- LCD Support: CONFIG_LCD 1764c609719bSwdenk 1765c609719bSwdenk Define this to enable LCD support (for output to LCD 1766c609719bSwdenk display); also select one of the supported displays 1767c609719bSwdenk by defining one of these: 1768c609719bSwdenk 176939cf4804SStelian Pop CONFIG_ATMEL_LCD: 177039cf4804SStelian Pop 177139cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 177239cf4804SStelian Pop 1773fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1774c609719bSwdenk 1775fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1776c609719bSwdenk 1777fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1778c609719bSwdenk 1779fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1780fd3103bbSwdenk Active, color, single scan. 1781fd3103bbSwdenk 1782fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1783fd3103bbSwdenk 1784fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1785c609719bSwdenk Active, color, single scan. 1786c609719bSwdenk 1787c609719bSwdenk CONFIG_SHARP_16x9 1788c609719bSwdenk 1789c609719bSwdenk Sharp 320x240. Active, color, single scan. 1790c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1791c609719bSwdenk 1792c609719bSwdenk CONFIG_SHARP_LQ64D341 1793c609719bSwdenk 1794c609719bSwdenk Sharp LQ64D341 display, 640x480. 1795c609719bSwdenk Active, color, single scan. 1796c609719bSwdenk 1797c609719bSwdenk CONFIG_HLD1045 1798c609719bSwdenk 1799c609719bSwdenk HLD1045 display, 640x480. 1800c609719bSwdenk Active, color, single scan. 1801c609719bSwdenk 1802c609719bSwdenk CONFIG_OPTREX_BW 1803c609719bSwdenk 1804c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1805c609719bSwdenk or 1806c609719bSwdenk Hitachi LMG6912RPFC-00T 1807c609719bSwdenk or 1808c609719bSwdenk Hitachi SP14Q002 1809c609719bSwdenk 1810c609719bSwdenk 320x240. Black & white. 1811c609719bSwdenk 1812c609719bSwdenk Normally display is black on white background; define 18136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1814c609719bSwdenk 1815676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1816676d319eSSimon Glass 1817676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1818676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1819676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1820676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1821676d319eSSimon Glass a per-section basis. 1822676d319eSSimon Glass 18230d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 18240d89efefSSimon Glass 18250d89efefSSimon Glass When the console need to be scrolled, this is the number of 18260d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 18270d89efefSSimon Glass the console jump but can help speed up operation when scrolling 18280d89efefSSimon Glass is slow. 1829676d319eSSimon Glass 183045d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 183145d7f525STom Wai-Hong Tam 183245d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 183345d7f525STom Wai-Hong Tam 1834735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1835735987c5STom Wai-Hong Tam 1836735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1837735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1838735987c5STom Wai-Hong Tam 18397152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1840d791b1dcSwdenk 1841d791b1dcSwdenk If this option is set, the environment is checked for 1842d791b1dcSwdenk a variable "splashimage". If found, the usual display 1843d791b1dcSwdenk of logo, copyright and system information on the LCD 1844e94d2cd9Swdenk is suppressed and the BMP image at the address 1845d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1846d791b1dcSwdenk console is redirected to the "nulldev", too. This 1847d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1848d791b1dcSwdenk loaded very quickly after power-on. 1849d791b1dcSwdenk 1850c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1851c0880485SNikita Kiryanov 1852c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1853c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 18541551df35STom Rini (see README.displaying-bmps). 1855c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1856c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1857c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1858c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1859c0880485SNikita Kiryanov there is no need to set this option. 1860c0880485SNikita Kiryanov 18611ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 18621ca298ceSMatthias Weisser 18631ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 18641ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 18651ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 18661ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 18671ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 18681ca298ceSMatthias Weisser specify 'm' for centering the image. 18691ca298ceSMatthias Weisser 18701ca298ceSMatthias Weisser Example: 18711ca298ceSMatthias Weisser setenv splashpos m,m 18721ca298ceSMatthias Weisser => image at center of screen 18731ca298ceSMatthias Weisser 18741ca298ceSMatthias Weisser setenv splashpos 30,20 18751ca298ceSMatthias Weisser => image at x = 30 and y = 20 18761ca298ceSMatthias Weisser 18771ca298ceSMatthias Weisser setenv splashpos -10,m 18781ca298ceSMatthias Weisser => vertically centered image 18791ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 18801ca298ceSMatthias Weisser 188198f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 188298f4a3dfSStefan Roese 188398f4a3dfSStefan Roese If this option is set, additionally to standard BMP 188498f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 188598f4a3dfSStefan Roese splashscreen support or the bmp command. 188698f4a3dfSStefan Roese 1887d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1888d5011762SAnatolij Gustschin 1889d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1890d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1891d5011762SAnatolij Gustschin bmp command. 1892d5011762SAnatolij Gustschin 1893f2b96dfbSLei Wen- Do compresssing for memory range: 1894f2b96dfbSLei Wen CONFIG_CMD_ZIP 1895f2b96dfbSLei Wen 1896f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1897f2b96dfbSLei Wen to compress the specified memory at its best effort. 1898f2b96dfbSLei Wen 1899c29fdfc1Swdenk- Compression support: 19008ef70478SKees Cook CONFIG_GZIP 19018ef70478SKees Cook 19028ef70478SKees Cook Enabled by default to support gzip compressed images. 19038ef70478SKees Cook 1904c29fdfc1Swdenk CONFIG_BZIP2 1905c29fdfc1Swdenk 1906c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1907c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1908c29fdfc1Swdenk compressed images are supported. 1909c29fdfc1Swdenk 1910c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 19116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1912c29fdfc1Swdenk be at least 4MB. 1913d791b1dcSwdenk 1914fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1915fc9c1727SLuigi 'Comio' Mantellini 1916fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1917fc9c1727SLuigi 'Comio' Mantellini images is included. 1918fc9c1727SLuigi 'Comio' Mantellini 1919fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1920fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1921fc9c1727SLuigi 'Comio' Mantellini formula: 1922fc9c1727SLuigi 'Comio' Mantellini 1923fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1924fc9c1727SLuigi 'Comio' Mantellini 1925fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1926fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1927fc9c1727SLuigi 'Comio' Mantellini 1928fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1929fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1930fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1931fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1932fc9c1727SLuigi 'Comio' Mantellini 1933fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1934fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 19356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1936fc9c1727SLuigi 'Comio' Mantellini 19378ef70478SKees Cook CONFIG_LZO 19388ef70478SKees Cook 19398ef70478SKees Cook If this option is set, support for LZO compressed images 19408ef70478SKees Cook is included. 19418ef70478SKees Cook 194217ea1177Swdenk- MII/PHY support: 194317ea1177Swdenk CONFIG_PHY_ADDR 194417ea1177Swdenk 194517ea1177Swdenk The address of PHY on MII bus. 194617ea1177Swdenk 194717ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 194817ea1177Swdenk 194917ea1177Swdenk The clock frequency of the MII bus 195017ea1177Swdenk 195117ea1177Swdenk CONFIG_PHY_GIGE 195217ea1177Swdenk 195317ea1177Swdenk If this option is set, support for speed/duplex 195411ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 195517ea1177Swdenk 195617ea1177Swdenk CONFIG_PHY_RESET_DELAY 195717ea1177Swdenk 195817ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 195917ea1177Swdenk reset before any MII register access is possible. 196017ea1177Swdenk For such PHY, set this option to the usec delay 196117ea1177Swdenk required. (minimum 300usec for LXT971A) 196217ea1177Swdenk 196317ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 196417ea1177Swdenk 196517ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 196617ea1177Swdenk command issued before MII status register can be read 196717ea1177Swdenk 1968c609719bSwdenk- Ethernet address: 1969c609719bSwdenk CONFIG_ETHADDR 1970c68a05feSrichardretanubun CONFIG_ETH1ADDR 1971c609719bSwdenk CONFIG_ETH2ADDR 1972c609719bSwdenk CONFIG_ETH3ADDR 1973c68a05feSrichardretanubun CONFIG_ETH4ADDR 1974c68a05feSrichardretanubun CONFIG_ETH5ADDR 1975c609719bSwdenk 197611ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 197711ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1978c609719bSwdenk is not determined automatically. 1979c609719bSwdenk 1980c609719bSwdenk- IP address: 1981c609719bSwdenk CONFIG_IPADDR 1982c609719bSwdenk 1983c609719bSwdenk Define a default value for the IP address to use for 198411ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1985c609719bSwdenk determined through e.g. bootp. 19861ebcd654SWolfgang Denk (Environment variable "ipaddr") 1987c609719bSwdenk 1988c609719bSwdenk- Server IP address: 1989c609719bSwdenk CONFIG_SERVERIP 1990c609719bSwdenk 1991c609719bSwdenk Defines a default value for the IP address of a TFTP 1992c609719bSwdenk server to contact when using the "tftboot" command. 19931ebcd654SWolfgang Denk (Environment variable "serverip") 1994c609719bSwdenk 199597cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 199697cfe861SRobin Getz 199797cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 199897cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 199997cfe861SRobin Getz 20001ebcd654SWolfgang Denk- Gateway IP address: 20011ebcd654SWolfgang Denk CONFIG_GATEWAYIP 20021ebcd654SWolfgang Denk 20031ebcd654SWolfgang Denk Defines a default value for the IP address of the 20041ebcd654SWolfgang Denk default router where packets to other networks are 20051ebcd654SWolfgang Denk sent to. 20061ebcd654SWolfgang Denk (Environment variable "gatewayip") 20071ebcd654SWolfgang Denk 20081ebcd654SWolfgang Denk- Subnet mask: 20091ebcd654SWolfgang Denk CONFIG_NETMASK 20101ebcd654SWolfgang Denk 20111ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 20121ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 20131ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 20141ebcd654SWolfgang Denk forwarded through a router. 20151ebcd654SWolfgang Denk (Environment variable "netmask") 20161ebcd654SWolfgang Denk 201753a5c424SDavid Updegraff- Multicast TFTP Mode: 201853a5c424SDavid Updegraff CONFIG_MCAST_TFTP 201953a5c424SDavid Updegraff 202053a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 202153a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 202211ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 202353a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 202453a5c424SDavid Updegraff multicast group. 202553a5c424SDavid Updegraff 2026c609719bSwdenk- BOOTP Recovery Mode: 2027c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 2028c609719bSwdenk 2029c609719bSwdenk If you have many targets in a network that try to 2030c609719bSwdenk boot using BOOTP, you may want to avoid that all 2031c609719bSwdenk systems send out BOOTP requests at precisely the same 2032c609719bSwdenk moment (which would happen for instance at recovery 2033c609719bSwdenk from a power failure, when all systems will try to 2034c609719bSwdenk boot, thus flooding the BOOTP server. Defining 2035c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 2036c609719bSwdenk inserted before sending out BOOTP requests. The 20376c33c785SWolfgang Denk following delays are inserted then: 2038c609719bSwdenk 2039c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 2040c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 2041c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 2042c609719bSwdenk 4th and following 2043c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 2044c609719bSwdenk 204592ac8accSThierry Reding CONFIG_BOOTP_ID_CACHE_SIZE 204692ac8accSThierry Reding 204792ac8accSThierry Reding BOOTP packets are uniquely identified using a 32-bit ID. The 204892ac8accSThierry Reding server will copy the ID from client requests to responses and 204992ac8accSThierry Reding U-Boot will use this to determine if it is the destination of 205092ac8accSThierry Reding an incoming response. Some servers will check that addresses 205192ac8accSThierry Reding aren't in use before handing them out (usually using an ARP 205292ac8accSThierry Reding ping) and therefore take up to a few hundred milliseconds to 205392ac8accSThierry Reding respond. Network congestion may also influence the time it 205492ac8accSThierry Reding takes for a response to make it back to the client. If that 205592ac8accSThierry Reding time is too long, U-Boot will retransmit requests. In order 205692ac8accSThierry Reding to allow earlier responses to still be accepted after these 205792ac8accSThierry Reding retransmissions, U-Boot's BOOTP client keeps a small cache of 205892ac8accSThierry Reding IDs. The CONFIG_BOOTP_ID_CACHE_SIZE controls the size of this 205992ac8accSThierry Reding cache. The default is to keep IDs for up to four outstanding 206092ac8accSThierry Reding requests. Increasing this will allow U-Boot to accept offers 206192ac8accSThierry Reding from a BOOTP client in networks with unusually high latency. 206292ac8accSThierry Reding 2063fe389a82Sstroese- DHCP Advanced Options: 20641fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 20651fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 2066fe389a82Sstroese 20671fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 20681fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 20691fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 20701fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 20711fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 20721fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 20731fe80d79SJon Loeliger CONFIG_BOOTP_DNS 20741fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 20751fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 20761fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 20771fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 20781fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 20792c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 2080fe389a82Sstroese 20815d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 20825d110f0aSWilson Callan environment variable, not the BOOTP server. 2083fe389a82Sstroese 20842c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 20852c00e099SJoe Hershberger after the configured retry count, the call will fail 20862c00e099SJoe Hershberger instead of starting over. This can be used to fail over 20872c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 20882c00e099SJoe Hershberger is not available. 20892c00e099SJoe Hershberger 2090fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 2091fe389a82Sstroese serverip from a DHCP server, it is possible that more 2092fe389a82Sstroese than one DNS serverip is offered to the client. 2093fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2094fe389a82Sstroese serverip will be stored in the additional environment 2095fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2096fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 20971fe80d79SJon Loeliger is defined. 2098fe389a82Sstroese 2099fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2100fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2101fe389a82Sstroese need the hostname of the DHCP requester. 21025d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 21031fe80d79SJon Loeliger of the "hostname" environment variable is passed as 21041fe80d79SJon Loeliger option 12 to the DHCP server. 2105fe389a82Sstroese 2106d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2107d9a2f416SAras Vaichas 2108d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2109d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2110d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2111d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2112d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2113d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2114d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2115d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2116d9a2f416SAras Vaichas that one of the retries will be successful but note that 2117d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2118d9a2f416SAras Vaichas this delay. 2119d9a2f416SAras Vaichas 2120d22c338eSJoe Hershberger - Link-local IP address negotiation: 2121d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2122d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2123d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2124d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2125d22c338eSJoe Hershberger 2126d22c338eSJoe Hershberger See doc/README.link-local for more information. 2127d22c338eSJoe Hershberger 2128a3d991bdSwdenk - CDP Options: 2129a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2130a3d991bdSwdenk 2131a3d991bdSwdenk The device id used in CDP trigger frames. 2132a3d991bdSwdenk 2133a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2134a3d991bdSwdenk 2135a3d991bdSwdenk A two character string which is prefixed to the MAC address 2136a3d991bdSwdenk of the device. 2137a3d991bdSwdenk 2138a3d991bdSwdenk CONFIG_CDP_PORT_ID 2139a3d991bdSwdenk 2140a3d991bdSwdenk A printf format string which contains the ascii name of 2141a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 214211ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2143a3d991bdSwdenk 2144a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2145a3d991bdSwdenk 2146a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2147a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2148a3d991bdSwdenk 2149a3d991bdSwdenk CONFIG_CDP_VERSION 2150a3d991bdSwdenk 2151a3d991bdSwdenk An ascii string containing the version of the software. 2152a3d991bdSwdenk 2153a3d991bdSwdenk CONFIG_CDP_PLATFORM 2154a3d991bdSwdenk 2155a3d991bdSwdenk An ascii string containing the name of the platform. 2156a3d991bdSwdenk 2157a3d991bdSwdenk CONFIG_CDP_TRIGGER 2158a3d991bdSwdenk 2159a3d991bdSwdenk A 32bit integer sent on the trigger. 2160a3d991bdSwdenk 2161a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2162a3d991bdSwdenk 2163a3d991bdSwdenk A 16bit integer containing the power consumption of the 2164a3d991bdSwdenk device in .1 of milliwatts. 2165a3d991bdSwdenk 2166a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2167a3d991bdSwdenk 2168a3d991bdSwdenk A byte containing the id of the VLAN. 2169a3d991bdSwdenk 2170c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2171c609719bSwdenk 2172c609719bSwdenk Several configurations allow to display the current 2173c609719bSwdenk status using a LED. For instance, the LED will blink 2174c609719bSwdenk fast while running U-Boot code, stop blinking as 2175c609719bSwdenk soon as a reply to a BOOTP request was received, and 2176c609719bSwdenk start blinking slow once the Linux kernel is running 2177c609719bSwdenk (supported by a status LED driver in the Linux 2178c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2179c609719bSwdenk feature in U-Boot. 2180c609719bSwdenk 21811df7bbbaSIgor Grinberg Additional options: 21821df7bbbaSIgor Grinberg 21831df7bbbaSIgor Grinberg CONFIG_GPIO_LED 21841df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 21851df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 21861df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 21871df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 21881df7bbbaSIgor Grinberg 21899dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 21909dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 21919dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 21929dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 21939dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 21949dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 21959dfdcdfeSIgor Grinberg 2196c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2197c609719bSwdenk 2198c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2199c609719bSwdenk on those systems that support this (optional) 2200c609719bSwdenk feature, like the TQM8xxL modules. 2201c609719bSwdenk 22023f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2203c609719bSwdenk 22043f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 22053f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 22063f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 22073f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 22083f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 22093f4978c7SHeiko Schocher interface. 22103f4978c7SHeiko Schocher 22113f4978c7SHeiko Schocher ported i2c driver to the new framework: 2212ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2213ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2214ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2215ea818dbbSHeiko Schocher for defining speed and slave address 2216ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2217ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2218ea818dbbSHeiko Schocher for defining speed and slave address 2219ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2220ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2221ea818dbbSHeiko Schocher for defining speed and slave address 2222ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2223ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2224ea818dbbSHeiko Schocher for defining speed and slave address 22253f4978c7SHeiko Schocher 222600f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 222700f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 222800f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 222900f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 223000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 223100f792e0SHeiko Schocher bus. 223200f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 223300f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 223400f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 223500f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 223600f792e0SHeiko Schocher second bus. 223700f792e0SHeiko Schocher 22381f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 22391f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 22401f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 22411f2ba722SSimon Glass 100000 and the slave addr 0! 22421f2ba722SSimon Glass 2243880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2244880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2245880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2246880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2247880540deSDirk Eibach 2248fac96408Strem - drivers/i2c/i2c_mxc.c 2249fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2250fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2251fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2252fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2253fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2254fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2255fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2256fac96408Strem If thoses defines are not set, default value is 100000 2257fac96408Strem for speed, and 0 for slave. 2258fac96408Strem 22591086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 22601086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 22611086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 22621086bfa9SNobuhiro Iwamatsu 22631086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 22641086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 22651086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 22661086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 22671086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 22681086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 22691086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 22701086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 22711086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 22721086bfa9SNobuhiro Iwamatsu 22732035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 22742035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 22752035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 22762035d77dSNobuhiro Iwamatsu 22772035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 22782035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 22792035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 22802035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 22812035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 22822035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 22832035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 22842035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 22852035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 22862035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 22872035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 22882035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 22892035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 22902035d77dSNobuhiro Iwamatsu 22916789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 22926789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 22936789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 22946789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 22956789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 22966789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 22976789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 22986789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 22996789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 23006789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 23016789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 23026789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 23036789e84eSHeiko Schocher 23040bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 23050bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 23060bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 23070bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 23080bdffe71SHeiko Schocher 2309e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2310e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2311e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2312e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2313e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2314e717fc6dSNaveen Krishna Ch 2315b46226bdSDirk Eibach - drivers/i2c/ihs_i2c.c 2316b46226bdSDirk Eibach - activate this driver with CONFIG_SYS_I2C_IHS 2317b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0 2318b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0 2319b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0 2320b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1 2321b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1 2322b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1 2323b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2 2324b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2 2325b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2 2326b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3 2327b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3 2328b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3 2329b46226bdSDirk Eibach 23303f4978c7SHeiko Schocher additional defines: 23313f4978c7SHeiko Schocher 23323f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 23333f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 23343f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 23353f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 23363f4978c7SHeiko Schocher omit this define. 23373f4978c7SHeiko Schocher 23383f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 23393f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 23403f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 23413f4978c7SHeiko Schocher omit this define. 23423f4978c7SHeiko Schocher 23433f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 23443f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 23453f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 23463f4978c7SHeiko Schocher define. 23473f4978c7SHeiko Schocher 23483f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 23493f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 23503f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 23513f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 23523f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 23533f4978c7SHeiko Schocher 23543f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 23553f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 23563f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 23573f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 23583f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 23593f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 23603f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 23613f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 23623f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 23633f4978c7SHeiko Schocher } 23643f4978c7SHeiko Schocher 23653f4978c7SHeiko Schocher which defines 23663f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2367ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2368ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2369ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2370ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2371ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 23723f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2373ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2374ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 23753f4978c7SHeiko Schocher 23763f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 23773f4978c7SHeiko Schocher 2378ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 23793f4978c7SHeiko Schocher 23803f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 23813f4978c7SHeiko Schocher provides the following compelling advantages: 23823f4978c7SHeiko Schocher 23833f4978c7SHeiko Schocher - more than one i2c adapter is usable 23843f4978c7SHeiko Schocher - approved multibus support 23853f4978c7SHeiko Schocher - better i2c mux support 23863f4978c7SHeiko Schocher 23873f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 23883f4978c7SHeiko Schocher 2389ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2390ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2391ea818dbbSHeiko Schocher for the selected CPU. 2392c609719bSwdenk 2393b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2394602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2395b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2396b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2397c609719bSwdenk command line interface. 2398c609719bSwdenk 2399bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2400c609719bSwdenk 2401b37c7e5eSwdenk There are several other quantities that must also be 2402ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2403c609719bSwdenk 24046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2405b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 24066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 240711ccc33fSMarcel Ziswiler the CPU's i2c node address). 2408c609719bSwdenk 24098d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2410a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 24118d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 24128d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 24138d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2414b37c7e5eSwdenk 24155da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 24165da71efaSEric Millbrandt 24175da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 24185da71efaSEric Millbrandt chips might think that the current transfer is still 24195da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 24205da71efaSEric Millbrandt commands until the slave device responds. 24215da71efaSEric Millbrandt 2422b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2423b37c7e5eSwdenk 2424ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2425b37c7e5eSwdenk then the following macros need to be defined (examples are 2426b37c7e5eSwdenk from include/configs/lwmon.h): 2427c609719bSwdenk 2428c609719bSwdenk I2C_INIT 2429c609719bSwdenk 2430b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2431c609719bSwdenk controller or configure ports. 2432c609719bSwdenk 2433b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2434b37c7e5eSwdenk 2435c609719bSwdenk I2C_PORT 2436c609719bSwdenk 2437c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2438c609719bSwdenk assumes both bits are on the same port). Valid values 2439c609719bSwdenk are 0..3 for ports A..D. 2440c609719bSwdenk 2441c609719bSwdenk I2C_ACTIVE 2442c609719bSwdenk 2443c609719bSwdenk The code necessary to make the I2C data line active 2444c609719bSwdenk (driven). If the data line is open collector, this 2445c609719bSwdenk define can be null. 2446c609719bSwdenk 2447b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2448b37c7e5eSwdenk 2449c609719bSwdenk I2C_TRISTATE 2450c609719bSwdenk 2451c609719bSwdenk The code necessary to make the I2C data line tri-stated 2452c609719bSwdenk (inactive). If the data line is open collector, this 2453c609719bSwdenk define can be null. 2454c609719bSwdenk 2455b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2456b37c7e5eSwdenk 2457c609719bSwdenk I2C_READ 2458c609719bSwdenk 2459472d5460SYork Sun Code that returns true if the I2C data line is high, 2460472d5460SYork Sun false if it is low. 2461c609719bSwdenk 2462b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2463b37c7e5eSwdenk 2464c609719bSwdenk I2C_SDA(bit) 2465c609719bSwdenk 2466472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2467472d5460SYork Sun is false, it clears it (low). 2468c609719bSwdenk 2469b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2470b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2471b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2472b37c7e5eSwdenk 2473c609719bSwdenk I2C_SCL(bit) 2474c609719bSwdenk 2475472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2476472d5460SYork Sun is false, it clears it (low). 2477c609719bSwdenk 2478b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2479b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2480b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2481b37c7e5eSwdenk 2482c609719bSwdenk I2C_DELAY 2483c609719bSwdenk 2484c609719bSwdenk This delay is invoked four times per clock cycle so this 2485c609719bSwdenk controls the rate of data transfer. The data rate thus 2486b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2487b37c7e5eSwdenk like: 2488b37c7e5eSwdenk 2489b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2490c609719bSwdenk 2491793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2492793b5726SMike Frysinger 2493793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2494793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2495793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2496793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2497793b5726SMike Frysinger 2498793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2499793b5726SMike Frysinger the generic GPIO functions. 2500793b5726SMike Frysinger 25016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 250247cd00faSwdenk 250347cd00faSwdenk When a board is reset during an i2c bus transfer 250447cd00faSwdenk chips might think that the current transfer is still 250547cd00faSwdenk in progress. On some boards it is possible to access 250647cd00faSwdenk the i2c SCLK line directly, either by using the 250747cd00faSwdenk processor pin as a GPIO or by having a second pin 250847cd00faSwdenk connected to the bus. If this option is defined a 250947cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 251047cd00faSwdenk is run early in the boot sequence. 251147cd00faSwdenk 251226a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 251326a33504SRichard Retanubun 251426a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 251526a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 251626a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 251726a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 251826a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 251926a33504SRichard Retanubun controller provide such a method. It is called at the end of 252026a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 252126a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 252226a33504SRichard Retanubun 252317ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 252417ea1177Swdenk 252517ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 252617ea1177Swdenk in u-boot bd_info structure based on u-boot environment 252717ea1177Swdenk variable "i2cfast". (see also i2cfast) 252817ea1177Swdenk 2529bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2530bb99ad6dSBen Warren 2531bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2532bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2533bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2534bb99ad6dSBen Warren Note that bus numbering is zero-based. 2535bb99ad6dSBen Warren 25366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2537bb99ad6dSBen Warren 2538bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 25390f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 25400f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 25410f89c54bSPeter Tyser a 1D array of device addresses 2542bb99ad6dSBen Warren 2543bb99ad6dSBen Warren e.g. 2544bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 25456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2546bb99ad6dSBen Warren 2547bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2548bb99ad6dSBen Warren 2549bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 25506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2551bb99ad6dSBen Warren 2552bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2553bb99ad6dSBen Warren 25546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2555be5e6181STimur Tabi 2556be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2557be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2558be5e6181STimur Tabi 25596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 25600dc018ecSStefan Roese 25610dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 25620dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 25630dc018ecSStefan Roese 25646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 25650dc018ecSStefan Roese 25660dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 25670dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 25680dc018ecSStefan Roese 25696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 25709ebbb54fSVictor Gallardo 25719ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 25729ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 25739ebbb54fSVictor Gallardo specified DTT device. 25749ebbb54fSVictor Gallardo 25752ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 25762ac6985aSAndrew Dyer 25772ac6985aSAndrew Dyer defining this will force the i2c_read() function in 25782ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 25792ac6985aSAndrew Dyer between writing the address pointer and reading the 25802ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 25812ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 25822ac6985aSAndrew Dyer devices can use either method, but some require one or 25832ac6985aSAndrew Dyer the other. 2584be5e6181STimur Tabi 2585c609719bSwdenk- SPI Support: CONFIG_SPI 2586c609719bSwdenk 2587c609719bSwdenk Enables SPI driver (so far only tested with 2588c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2589c609719bSwdenk D/As on the SACSng board) 2590c609719bSwdenk 25916639562eSYoshihiro Shimoda CONFIG_SH_SPI 25926639562eSYoshihiro Shimoda 25936639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 25946639562eSYoshihiro Shimoda only SH7757 is supported. 25956639562eSYoshihiro Shimoda 2596c609719bSwdenk CONFIG_SPI_X 2597c609719bSwdenk 2598c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2599c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2600c609719bSwdenk 2601c609719bSwdenk CONFIG_SOFT_SPI 2602c609719bSwdenk 2603c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2604c609719bSwdenk using hardware support. This is a general purpose 2605c609719bSwdenk driver that only requires three general I/O port pins 2606c609719bSwdenk (two outputs, one input) to function. If this is 2607c609719bSwdenk defined, the board configuration must define several 2608c609719bSwdenk SPI configuration items (port pins to use, etc). For 2609c609719bSwdenk an example, see include/configs/sacsng.h. 2610c609719bSwdenk 261104a9e118SBen Warren CONFIG_HARD_SPI 261204a9e118SBen Warren 261304a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 261404a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 261504a9e118SBen Warren must define a list of chip-select function pointers. 261604a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 261704a9e118SBen Warren example, see include/configs/mpc8349emds.h. 261804a9e118SBen Warren 261938254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 262038254f45SGuennadi Liakhovetski 262138254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 26222e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 262338254f45SGuennadi Liakhovetski 2624f659b573SHeiko Schocher CONFIG_SYS_SPI_MXC_WAIT 2625f659b573SHeiko Schocher Timeout for waiting until spi transfer completed. 2626f659b573SHeiko Schocher default: (CONFIG_SYS_HZ/100) /* 10 ms */ 2627f659b573SHeiko Schocher 26280133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 26290133502eSMatthias Fuchs 26300133502eSMatthias Fuchs Enables FPGA subsystem. 26310133502eSMatthias Fuchs 26320133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 26330133502eSMatthias Fuchs 26340133502eSMatthias Fuchs Enables support for specific chip vendors. 26350133502eSMatthias Fuchs (ALTERA, XILINX) 26360133502eSMatthias Fuchs 26370133502eSMatthias Fuchs CONFIG_FPGA_<family> 26380133502eSMatthias Fuchs 26390133502eSMatthias Fuchs Enables support for FPGA family. 26400133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 26410133502eSMatthias Fuchs 26420133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2643c609719bSwdenk 2644c609719bSwdenk Specify the number of FPGA devices to support. 2645c609719bSwdenk 264664e809afSSiva Durga Prasad Paladugu CONFIG_CMD_FPGA_LOADMK 264764e809afSSiva Durga Prasad Paladugu 264864e809afSSiva Durga Prasad Paladugu Enable support for fpga loadmk command 264964e809afSSiva Durga Prasad Paladugu 265067193864SMichal Simek CONFIG_CMD_FPGA_LOADP 265167193864SMichal Simek 265267193864SMichal Simek Enable support for fpga loadp command - load partial bitstream 265367193864SMichal Simek 265467193864SMichal Simek CONFIG_CMD_FPGA_LOADBP 265567193864SMichal Simek 265667193864SMichal Simek Enable support for fpga loadbp command - load partial bitstream 265767193864SMichal Simek (Xilinx only) 265867193864SMichal Simek 26596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2660c609719bSwdenk 2661c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2662c609719bSwdenk 26636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2664c609719bSwdenk 2665c609719bSwdenk Enable checks on FPGA configuration interface busy 2666c609719bSwdenk status by the configuration function. This option 2667c609719bSwdenk will require a board or device specific function to 2668c609719bSwdenk be written. 2669c609719bSwdenk 2670c609719bSwdenk CONFIG_FPGA_DELAY 2671c609719bSwdenk 2672c609719bSwdenk If defined, a function that provides delays in the FPGA 2673c609719bSwdenk configuration driver. 2674c609719bSwdenk 26756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2676c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2677c609719bSwdenk 26786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2679c609719bSwdenk 2680c609719bSwdenk Check for configuration errors during FPGA bitfile 2681c609719bSwdenk loading. For example, abort during Virtex II 2682c609719bSwdenk configuration if the INIT_B line goes low (which 2683c609719bSwdenk indicated a CRC error). 2684c609719bSwdenk 26856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2686c609719bSwdenk 2687c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2688c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2689c609719bSwdenk FPGA configuration sequence. The default time is 500 269011ccc33fSMarcel Ziswiler ms. 2691c609719bSwdenk 26926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2693c609719bSwdenk 2694c609719bSwdenk Maximum time to wait for BUSY to deassert during 269511ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2696c609719bSwdenk 26976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2698c609719bSwdenk 2699c609719bSwdenk Time to wait after FPGA configuration. The default is 270011ccc33fSMarcel Ziswiler 200 ms. 2701c609719bSwdenk 2702c609719bSwdenk- Configuration Management: 2703c609719bSwdenk CONFIG_IDENT_STRING 2704c609719bSwdenk 2705c609719bSwdenk If defined, this string will be added to the U-Boot 2706c609719bSwdenk version information (U_BOOT_VERSION) 2707c609719bSwdenk 2708c609719bSwdenk- Vendor Parameter Protection: 2709c609719bSwdenk 2710c609719bSwdenk U-Boot considers the values of the environment 2711c609719bSwdenk variables "serial#" (Board Serial Number) and 27127152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2713c609719bSwdenk are set once by the board vendor / manufacturer, and 2714c609719bSwdenk protects these variables from casual modification by 2715c609719bSwdenk the user. Once set, these variables are read-only, 2716c609719bSwdenk and write or delete attempts are rejected. You can 271711ccc33fSMarcel Ziswiler change this behaviour: 2718c609719bSwdenk 2719c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2720c609719bSwdenk file, the write protection for vendor parameters is 272147cd00faSwdenk completely disabled. Anybody can change or delete 2722c609719bSwdenk these parameters. 2723c609719bSwdenk 2724c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2725c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 272611ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2727c609719bSwdenk which can be changed exactly ONCE by the user. [The 2728c609719bSwdenk serial# is unaffected by this, i. e. it remains 2729c609719bSwdenk read-only.] 2730c609719bSwdenk 27312598090bSJoe Hershberger The same can be accomplished in a more flexible way 27322598090bSJoe Hershberger for any variable by configuring the type of access 27332598090bSJoe Hershberger to allow for those variables in the ".flags" variable 27342598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 27352598090bSJoe Hershberger 2736c609719bSwdenk- Protected RAM: 2737c609719bSwdenk CONFIG_PRAM 2738c609719bSwdenk 2739c609719bSwdenk Define this variable to enable the reservation of 2740c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2741c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2742c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2743c609719bSwdenk this default value by defining an environment 2744c609719bSwdenk variable "pram" to the number of kB you want to 2745c609719bSwdenk reserve. Note that the board info structure will 2746c609719bSwdenk still show the full amount of RAM. If pRAM is 2747c609719bSwdenk reserved, a new environment variable "mem" will 2748c609719bSwdenk automatically be defined to hold the amount of 2749c609719bSwdenk remaining RAM in a form that can be passed as boot 2750c609719bSwdenk argument to Linux, for instance like that: 2751c609719bSwdenk 2752fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2753c609719bSwdenk saveenv 2754c609719bSwdenk 2755c609719bSwdenk This way you can tell Linux not to use this memory, 2756c609719bSwdenk either, which results in a memory region that will 2757c609719bSwdenk not be affected by reboots. 2758c609719bSwdenk 2759c609719bSwdenk *WARNING* If your board configuration uses automatic 2760c609719bSwdenk detection of the RAM size, you must make sure that 2761c609719bSwdenk this memory test is non-destructive. So far, the 2762c609719bSwdenk following board configurations are known to be 2763c609719bSwdenk "pRAM-clean": 2764c609719bSwdenk 27651b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 27661b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2767544d97e9SWolfgang Denk FLAGADM, TQM8260 2768c609719bSwdenk 276940fef049SGabe Black- Access to physical memory region (> 4GB) 277040fef049SGabe Black Some basic support is provided for operations on memory not 277140fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 277240fef049SGabe Black support access to more than 4GB of memory on 32-bit 277340fef049SGabe Black machines using physical address extension or similar. 277440fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 277540fef049SGabe Black currently only supports clearing the memory. 277640fef049SGabe Black 2777c609719bSwdenk- Error Recovery: 2778c609719bSwdenk CONFIG_PANIC_HANG 2779c609719bSwdenk 2780c609719bSwdenk Define this variable to stop the system in case of a 2781c609719bSwdenk fatal error, so that you have to reset it manually. 2782c609719bSwdenk This is probably NOT a good idea for an embedded 278311ccc33fSMarcel Ziswiler system where you want the system to reboot 2784c609719bSwdenk automatically as fast as possible, but it may be 2785c609719bSwdenk useful during development since you can try to debug 2786c609719bSwdenk the conditions that lead to the situation. 2787c609719bSwdenk 2788c609719bSwdenk CONFIG_NET_RETRY_COUNT 2789c609719bSwdenk 2790c609719bSwdenk This variable defines the number of retries for 2791c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2792c609719bSwdenk before giving up the operation. If not defined, a 2793c609719bSwdenk default value of 5 is used. 2794c609719bSwdenk 279540cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 279640cb90eeSGuennadi Liakhovetski 279740cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 279840cb90eeSGuennadi Liakhovetski 279948a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 280048a3e999STetsuyuki Kobayashi 280148a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 280248a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 280348a3e999STetsuyuki Kobayashi try longer timeout such as 280448a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 280548a3e999STetsuyuki Kobayashi 2806c609719bSwdenk- Command Interpreter: 28078078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 280804a85b3bSwdenk 280904a85b3bSwdenk Enable auto completion of commands using TAB. 281004a85b3bSwdenk 28118078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 28128078f1a5SWolfgang Denk for the "hush" shell. 28138078f1a5SWolfgang Denk 28148078f1a5SWolfgang Denk 28156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2816c609719bSwdenk 2817c609719bSwdenk Define this variable to enable the "hush" shell (from 2818c609719bSwdenk Busybox) as command line interpreter, thus enabling 2819c609719bSwdenk powerful command line syntax like 2820c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2821c609719bSwdenk constructs ("shell scripts"). 2822c609719bSwdenk 2823c609719bSwdenk If undefined, you get the old, much simpler behaviour 2824c609719bSwdenk with a somewhat smaller memory footprint. 2825c609719bSwdenk 2826c609719bSwdenk 28276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2828c609719bSwdenk 2829c609719bSwdenk This defines the secondary prompt string, which is 2830c609719bSwdenk printed when the command interpreter needs more input 2831c609719bSwdenk to complete a command. Usually "> ". 2832c609719bSwdenk 2833c609719bSwdenk Note: 2834c609719bSwdenk 2835c609719bSwdenk In the current implementation, the local variables 2836c609719bSwdenk space and global environment variables space are 2837c609719bSwdenk separated. Local variables are those you define by 28383b57fe0aSwdenk simply typing `name=value'. To access a local 2839c609719bSwdenk variable later on, you have write `$name' or 28403b57fe0aSwdenk `${name}'; to execute the contents of a variable 28413b57fe0aSwdenk directly type `$name' at the command prompt. 2842c609719bSwdenk 2843c609719bSwdenk Global environment variables are those you use 2844c609719bSwdenk setenv/printenv to work with. To run a command stored 2845c609719bSwdenk in such a variable, you need to use the run command, 2846c609719bSwdenk and you must not use the '$' sign to access them. 2847c609719bSwdenk 2848c609719bSwdenk To store commands and special characters in a 2849c609719bSwdenk variable, please use double quotation marks 2850c609719bSwdenk surrounding the whole text of the variable, instead 2851c609719bSwdenk of the backslashes before semicolons and special 2852c609719bSwdenk symbols. 2853c609719bSwdenk 2854aa0c71acSWolfgang Denk- Commandline Editing and History: 2855aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2856aa0c71acSWolfgang Denk 285711ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2858aa0c71acSWolfgang Denk commandline input operations 2859aa0c71acSWolfgang Denk 2860a8c7c708Swdenk- Default Environment: 2861c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2862c609719bSwdenk 2863c609719bSwdenk Define this to contain any number of null terminated 2864c609719bSwdenk strings (variable = value pairs) that will be part of 28657152b1d0Swdenk the default environment compiled into the boot image. 28662262cfeeSwdenk 2867c609719bSwdenk For example, place something like this in your 2868c609719bSwdenk board's config file: 2869c609719bSwdenk 2870c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2871c609719bSwdenk "myvar1=value1\0" \ 2872c609719bSwdenk "myvar2=value2\0" 2873c609719bSwdenk 2874c609719bSwdenk Warning: This method is based on knowledge about the 2875c609719bSwdenk internal format how the environment is stored by the 28762262cfeeSwdenk U-Boot code. This is NOT an official, exported 2877c609719bSwdenk interface! Although it is unlikely that this format 28787152b1d0Swdenk will change soon, there is no guarantee either. 2879c609719bSwdenk You better know what you are doing here. 2880c609719bSwdenk 2881c609719bSwdenk Note: overly (ab)use of the default environment is 2882c609719bSwdenk discouraged. Make sure to check other ways to preset 288374de7aefSWolfgang Denk the environment like the "source" command or the 2884c609719bSwdenk boot command first. 2885c609719bSwdenk 28865e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 28875e724ca2SStephen Warren 28885e724ca2SStephen Warren Define this in order to add variables describing the 28895e724ca2SStephen Warren U-Boot build configuration to the default environment. 28905e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 28915e724ca2SStephen Warren 28925e724ca2SStephen Warren Enabling this option will cause the following to be defined: 28935e724ca2SStephen Warren 28945e724ca2SStephen Warren - CONFIG_SYS_ARCH 28955e724ca2SStephen Warren - CONFIG_SYS_CPU 28965e724ca2SStephen Warren - CONFIG_SYS_BOARD 28975e724ca2SStephen Warren - CONFIG_SYS_VENDOR 28985e724ca2SStephen Warren - CONFIG_SYS_SOC 28995e724ca2SStephen Warren 29007e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 29017e27f89fSTom Rini 29027e27f89fSTom Rini Define this in order to add variables describing certain 29037e27f89fSTom Rini run-time determined information about the hardware to the 29047e27f89fSTom Rini environment. These will be named board_name, board_rev. 29057e27f89fSTom Rini 290606fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 290706fd8538SSimon Glass 290806fd8538SSimon Glass Normally the environment is loaded when the board is 290906fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 291006fd8538SSimon Glass that so that the environment is not available until 291106fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 291206fd8538SSimon Glass this is instead controlled by the value of 291306fd8538SSimon Glass /config/load-environment. 291406fd8538SSimon Glass 2915a8c7c708Swdenk- DataFlash Support: 29162abbe075Swdenk CONFIG_HAS_DATAFLASH 29172abbe075Swdenk 29182abbe075Swdenk Defining this option enables DataFlash features and 29192abbe075Swdenk allows to read/write in Dataflash via the standard 29202abbe075Swdenk commands cp, md... 29212abbe075Swdenk 2922f61ec45eSEric Nelson- Serial Flash support 2923f61ec45eSEric Nelson CONFIG_CMD_SF 2924f61ec45eSEric Nelson 2925f61ec45eSEric Nelson Defining this option enables SPI flash commands 2926f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2927f61ec45eSEric Nelson 2928f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2929f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2930f61ec45eSEric Nelson commands. 2931f61ec45eSEric Nelson 2932f61ec45eSEric Nelson The following defaults may be provided by the platform 2933f61ec45eSEric Nelson to handle the common case when only a single serial 2934f61ec45eSEric Nelson flash is present on the system. 2935f61ec45eSEric Nelson 2936f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2937f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2938f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2939f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2940f61ec45eSEric Nelson 294124007273SSimon Glass CONFIG_CMD_SF_TEST 294224007273SSimon Glass 294324007273SSimon Glass Define this option to include a destructive SPI flash 294424007273SSimon Glass test ('sf test'). 294524007273SSimon Glass 29461dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 29471dcd6d03SJagannadha Sutradharudu Teki 29481dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 29491dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 29501dcd6d03SJagannadha Sutradharudu Teki 2951b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2952b902e07cSJagannadha Sutradharudu Teki 2953b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2954b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2955b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2956b902e07cSJagannadha Sutradharudu Teki 2957562f8df1SHeiko Schocher CONFIG_SYS_SPI_ST_ENABLE_WP_PIN 2958562f8df1SHeiko Schocher enable the W#/Vpp signal to disable writing to the status 2959562f8df1SHeiko Schocher register on ST MICRON flashes like the N25Q128. 2960562f8df1SHeiko Schocher The status register write enable/disable bit, combined with 2961562f8df1SHeiko Schocher the W#/VPP signal provides hardware data protection for the 2962562f8df1SHeiko Schocher device as follows: When the enable/disable bit is set to 1, 2963562f8df1SHeiko Schocher and the W#/VPP signal is driven LOW, the status register 2964562f8df1SHeiko Schocher nonvolatile bits become read-only and the WRITE STATUS REGISTER 2965562f8df1SHeiko Schocher operation will not execute. The only way to exit this 2966562f8df1SHeiko Schocher hardware-protected mode is to drive W#/VPP HIGH. 2967562f8df1SHeiko Schocher 29683f85ce27Swdenk- SystemACE Support: 29693f85ce27Swdenk CONFIG_SYSTEMACE 29703f85ce27Swdenk 29713f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 29723f85ce27Swdenk chips attached via some sort of local bus. The address 297311ccc33fSMarcel Ziswiler of the chip must also be defined in the 29746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 29753f85ce27Swdenk 29763f85ce27Swdenk #define CONFIG_SYSTEMACE 29776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 29783f85ce27Swdenk 29793f85ce27Swdenk When SystemACE support is added, the "ace" device type 29803f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 29813f85ce27Swdenk 2982ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2983ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2984ecb0ccd9SWolfgang Denk 298528cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2986ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 298728cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2988ecb0ccd9SWolfgang Denk number generator is used. 2989ecb0ccd9SWolfgang Denk 299028cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 299128cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 299228cb9375SWolfgang Denk defined, the normal port 69 is used. 299328cb9375SWolfgang Denk 299428cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2995ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2996ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2997ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2998ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2999ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 3000ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 3001ecb0ccd9SWolfgang Denk 3002bf36c5d5SSimon Glass- Hashing support: 3003bf36c5d5SSimon Glass CONFIG_CMD_HASH 3004bf36c5d5SSimon Glass 3005bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 3006bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 3007bf36c5d5SSimon Glass 3008bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 3009bf36c5d5SSimon Glass 3010bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 3011bf36c5d5SSimon Glass size a little. 3012bf36c5d5SSimon Glass 3013bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 3014bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 3015bf36c5d5SSimon Glass 3016bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 3017bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 3018bf36c5d5SSimon Glass 3019a11f1873SRobert Winkler- Freescale i.MX specific commands: 3020a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 3021a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 3022a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 3023a11f1873SRobert Winkler 3024a11f1873SRobert Winkler CONFIG_CMD_BMODE 3025a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 3026a11f1873SRobert Winkler a boot from specific media. 3027a11f1873SRobert Winkler 3028a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 3029a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 3030a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 3031a11f1873SRobert Winkler will set it back to normal. This command currently 3032a11f1873SRobert Winkler supports i.MX53 and i.MX6. 3033a11f1873SRobert Winkler 303419c402afSSimon Glass- Signing support: 303519c402afSSimon Glass CONFIG_RSA 303619c402afSSimon Glass 303719c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 30388bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 303919c402afSSimon Glass 304019c402afSSimon Glass The signing part is build into mkimage regardless of this 304119c402afSSimon Glass option. 304219c402afSSimon Glass 30439e50c406SHeiko Schocher- bootcount support: 30449e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 30459e50c406SHeiko Schocher 30469e50c406SHeiko Schocher This enables the bootcounter support, see: 30479e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 30489e50c406SHeiko Schocher 30499e50c406SHeiko Schocher CONFIG_AT91SAM9XE 30509e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 30519e50c406SHeiko Schocher CONFIG_BLACKFIN 30529e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 30539e50c406SHeiko Schocher CONFIG_SOC_DA8XX 30549e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 30559e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 30569e50c406SHeiko Schocher enable support for the bootcounter in RAM 30579e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 30589e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 30599e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 30609e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 30619e50c406SHeiko Schocher the bootcounter. 30629e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 306319c402afSSimon Glass 3064a8c7c708Swdenk- Show boot progress: 3065c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 3066c609719bSwdenk 3067c609719bSwdenk Defining this option allows to add some board- 3068c609719bSwdenk specific code (calling a user-provided function 3069c609719bSwdenk "show_boot_progress(int)") that enables you to show 3070c609719bSwdenk the system's boot progress on some display (for 3071c609719bSwdenk example, some LED's) on your board. At the moment, 3072c609719bSwdenk the following checkpoints are implemented: 3073c609719bSwdenk 30743a608ca0SSimon Glass- Detailed boot stage timing 30753a608ca0SSimon Glass CONFIG_BOOTSTAGE 30763a608ca0SSimon Glass Define this option to get detailed timing of each stage 30773a608ca0SSimon Glass of the boot process. 30783a608ca0SSimon Glass 30793a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 30803a608ca0SSimon Glass This is the number of available user bootstage records. 30813a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 30823a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 30833a608ca0SSimon Glass the limit, recording will stop. 30843a608ca0SSimon Glass 30853a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 30863a608ca0SSimon Glass Define this to print a report before boot, similar to this: 30873a608ca0SSimon Glass 30883a608ca0SSimon Glass Timer summary in microseconds: 30893a608ca0SSimon Glass Mark Elapsed Stage 30903a608ca0SSimon Glass 0 0 reset 30913a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 30923a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 30933a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 30943a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 30953a608ca0SSimon Glass 3,910,375 250,777 main_loop 30963a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 30973a608ca0SSimon Glass 30,361,327 445,160 start_kernel 30983a608ca0SSimon Glass 30992eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 31002eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 31012eba38cfSSimon Glass and un/stashing of bootstage data. 31022eba38cfSSimon Glass 310394fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 310494fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 310594fd1316SSimon Glass node is created with each bootstage id as a child. Each child 310694fd1316SSimon Glass has a 'name' property and either 'mark' containing the 310794fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 310894fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 310994fd1316SSimon Glass For example: 311094fd1316SSimon Glass 311194fd1316SSimon Glass bootstage { 311294fd1316SSimon Glass 154 { 311394fd1316SSimon Glass name = "board_init_f"; 311494fd1316SSimon Glass mark = <3575678>; 311594fd1316SSimon Glass }; 311694fd1316SSimon Glass 170 { 311794fd1316SSimon Glass name = "lcd"; 311894fd1316SSimon Glass accum = <33482>; 311994fd1316SSimon Glass }; 312094fd1316SSimon Glass }; 312194fd1316SSimon Glass 312294fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 312394fd1316SSimon Glass 31241372cce2SMarian BalakowiczLegacy uImage format: 31251372cce2SMarian Balakowicz 3126c609719bSwdenk Arg Where When 3127c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3128c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3129c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3130c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3131c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3132c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3133c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3134c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3135c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 31361372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3137c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3138c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3139c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3140c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 31411372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3142c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 31431372cce2SMarian Balakowicz 31441372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 31451372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 31461372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 31471372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 31481372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 31491372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 31501372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 315111ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 31521372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 31531372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 31541372cce2SMarian Balakowicz 3155ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3156c609719bSwdenk 3157a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 315863e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 315963e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 316063e73c9aSwdenk 3161566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3162566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3163566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3164566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3165566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3166566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3167566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3168566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3169566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3170566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3171566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3172566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3173566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3174566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3175566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3176566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3177566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3178566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3179566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3180566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3181566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3182566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3183566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3184566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3185566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3186566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3187566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3188566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3189566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3190566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3191566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3192566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3193566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3194566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3195566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3196566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3197566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3198566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3199566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3200566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3201566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3202566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3203566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3204566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3205566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3206566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3207566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3208c609719bSwdenk 3209566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3210c609719bSwdenk 3211566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3212566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3213566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3214206c60cbSwdenk 3215566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3216566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 321711ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3218566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3219566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3220566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 322174de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 322274de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3223566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3224c609719bSwdenk 32251372cce2SMarian BalakowiczFIT uImage format: 32261372cce2SMarian Balakowicz 32271372cce2SMarian Balakowicz Arg Where When 32281372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 32291372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 32301372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 32311372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 32321372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 32331372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3234f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 32351372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 32361372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 32371372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 32381372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 32391372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 324011ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 324111ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 32421372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 32431372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 32441372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 32451372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 32461372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 32471372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 32481372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 32491372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 32501372cce2SMarian Balakowicz 32511372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 32521372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 32531372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 325411ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 32551372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 32561372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 32571372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 32581372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 32591372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 32601372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 32611372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 32621372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 32631372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 32641372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 32651372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 32661372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 32671372cce2SMarian Balakowicz 326811ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 32691372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 32701372cce2SMarian Balakowicz 327111ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 32721372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 32731372cce2SMarian Balakowicz 327411ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 32751372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 32761372cce2SMarian Balakowicz 327721d29f7fSHeiko Schocher- legacy image format: 327821d29f7fSHeiko Schocher CONFIG_IMAGE_FORMAT_LEGACY 327921d29f7fSHeiko Schocher enables the legacy image format support in U-Boot. 328021d29f7fSHeiko Schocher 328121d29f7fSHeiko Schocher Default: 328221d29f7fSHeiko Schocher enabled if CONFIG_FIT_SIGNATURE is not defined. 328321d29f7fSHeiko Schocher 328421d29f7fSHeiko Schocher CONFIG_DISABLE_IMAGE_LEGACY 328521d29f7fSHeiko Schocher disable the legacy image format 328621d29f7fSHeiko Schocher 328721d29f7fSHeiko Schocher This define is introduced, as the legacy image format is 328821d29f7fSHeiko Schocher enabled per default for backward compatibility. 328921d29f7fSHeiko Schocher 3290d95f6ec7SGabe Black- FIT image support: 3291d95f6ec7SGabe Black CONFIG_FIT 3292d95f6ec7SGabe Black Enable support for the FIT uImage format. 3293d95f6ec7SGabe Black 3294d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3295d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3296d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3297d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3298d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3299d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3300d95f6ec7SGabe Black 33013e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 33023e569a6bSSimon Glass This option enables signature verification of FIT uImages, 33033e569a6bSSimon Glass using a hash signed and verified using RSA. See 33043e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 33053e569a6bSSimon Glass 330621d29f7fSHeiko Schocher WARNING: When relying on signed FIT images with required 330721d29f7fSHeiko Schocher signature check the legacy image format is default 330821d29f7fSHeiko Schocher disabled. If a board need legacy image format support 330921d29f7fSHeiko Schocher enable this through CONFIG_IMAGE_FORMAT_LEGACY 331021d29f7fSHeiko Schocher 33119a4f479bSDirk Eibach CONFIG_FIT_DISABLE_SHA256 33129a4f479bSDirk Eibach Supporting SHA256 hashes has quite an impact on binary size. 33139a4f479bSDirk Eibach For constrained systems sha256 hash support can be disabled 33149a4f479bSDirk Eibach with this option. 33159a4f479bSDirk Eibach 33164cf2609bSWolfgang Denk- Standalone program support: 33174cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 33184cf2609bSWolfgang Denk 33196feff899SWolfgang Denk This option defines a board specific value for the 33206feff899SWolfgang Denk address where standalone program gets loaded, thus 33216feff899SWolfgang Denk overwriting the architecture dependent default 33224cf2609bSWolfgang Denk settings. 33234cf2609bSWolfgang Denk 33244cf2609bSWolfgang Denk- Frame Buffer Address: 33254cf2609bSWolfgang Denk CONFIG_FB_ADDR 33264cf2609bSWolfgang Denk 33274cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 332844a53b57SWolfgang Denk address for frame buffer. This is typically the case 332944a53b57SWolfgang Denk when using a graphics controller has separate video 333044a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 333144a53b57SWolfgang Denk the given address instead of dynamically reserving it 333244a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 333344a53b57SWolfgang Denk the memory for the frame buffer depending on the 333444a53b57SWolfgang Denk configured panel size. 33354cf2609bSWolfgang Denk 33364cf2609bSWolfgang Denk Please see board_init_f function. 33374cf2609bSWolfgang Denk 3338cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3339cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3340cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3341cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3342cccfc2abSDetlev Zundel 3343cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3344cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3345cccfc2abSDetlev Zundel 3346cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3347cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3348cccfc2abSDetlev Zundel 3349cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3350cccfc2abSDetlev Zundel Needed for mtdparts command support. 3351cccfc2abSDetlev Zundel 3352cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3353cccfc2abSDetlev Zundel 3354cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3355cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3356cccfc2abSDetlev Zundel 3357ff94bc40SHeiko Schocher CONFIG_MTD_NAND_VERIFY_WRITE 3358ff94bc40SHeiko Schocher verify if the written data is correct reread. 3359ff94bc40SHeiko Schocher 336070c219cdSJoe Hershberger- UBI support 336170c219cdSJoe Hershberger CONFIG_CMD_UBI 336270c219cdSJoe Hershberger 336370c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 336470c219cdSJoe Hershberger with the UBI flash translation layer 336570c219cdSJoe Hershberger 336670c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 336770c219cdSJoe Hershberger 3368147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3369147162daSJoe Hershberger 3370147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3371147162daSJoe Hershberger warnings and errors enabled. 3372147162daSJoe Hershberger 3373ff94bc40SHeiko Schocher 3374ff94bc40SHeiko Schocher CONFIG_MTD_UBI_WL_THRESHOLD 3375ff94bc40SHeiko Schocher This parameter defines the maximum difference between the highest 3376ff94bc40SHeiko Schocher erase counter value and the lowest erase counter value of eraseblocks 3377ff94bc40SHeiko Schocher of UBI devices. When this threshold is exceeded, UBI starts performing 3378ff94bc40SHeiko Schocher wear leveling by means of moving data from eraseblock with low erase 3379ff94bc40SHeiko Schocher counter to eraseblocks with high erase counter. 3380ff94bc40SHeiko Schocher 3381ff94bc40SHeiko Schocher The default value should be OK for SLC NAND flashes, NOR flashes and 3382ff94bc40SHeiko Schocher other flashes which have eraseblock life-cycle 100000 or more. 3383ff94bc40SHeiko Schocher However, in case of MLC NAND flashes which typically have eraseblock 3384ff94bc40SHeiko Schocher life-cycle less than 10000, the threshold should be lessened (e.g., 3385ff94bc40SHeiko Schocher to 128 or 256, although it does not have to be power of 2). 3386ff94bc40SHeiko Schocher 3387ff94bc40SHeiko Schocher default: 4096 3388ff94bc40SHeiko Schocher 3389ff94bc40SHeiko Schocher CONFIG_MTD_UBI_BEB_LIMIT 3390ff94bc40SHeiko Schocher This option specifies the maximum bad physical eraseblocks UBI 3391ff94bc40SHeiko Schocher expects on the MTD device (per 1024 eraseblocks). If the 3392ff94bc40SHeiko Schocher underlying flash does not admit of bad eraseblocks (e.g. NOR 3393ff94bc40SHeiko Schocher flash), this value is ignored. 3394ff94bc40SHeiko Schocher 3395ff94bc40SHeiko Schocher NAND datasheets often specify the minimum and maximum NVM 3396ff94bc40SHeiko Schocher (Number of Valid Blocks) for the flashes' endurance lifetime. 3397ff94bc40SHeiko Schocher The maximum expected bad eraseblocks per 1024 eraseblocks 3398ff94bc40SHeiko Schocher then can be calculated as "1024 * (1 - MinNVB / MaxNVB)", 3399ff94bc40SHeiko Schocher which gives 20 for most NANDs (MaxNVB is basically the total 3400ff94bc40SHeiko Schocher count of eraseblocks on the chip). 3401ff94bc40SHeiko Schocher 3402ff94bc40SHeiko Schocher To put it differently, if this value is 20, UBI will try to 3403ff94bc40SHeiko Schocher reserve about 1.9% of physical eraseblocks for bad blocks 3404ff94bc40SHeiko Schocher handling. And that will be 1.9% of eraseblocks on the entire 3405ff94bc40SHeiko Schocher NAND chip, not just the MTD partition UBI attaches. This means 3406ff94bc40SHeiko Schocher that if you have, say, a NAND flash chip admits maximum 40 bad 3407ff94bc40SHeiko Schocher eraseblocks, and it is split on two MTD partitions of the same 3408ff94bc40SHeiko Schocher size, UBI will reserve 40 eraseblocks when attaching a 3409ff94bc40SHeiko Schocher partition. 3410ff94bc40SHeiko Schocher 3411ff94bc40SHeiko Schocher default: 20 3412ff94bc40SHeiko Schocher 3413ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP 3414ff94bc40SHeiko Schocher Fastmap is a mechanism which allows attaching an UBI device 3415ff94bc40SHeiko Schocher in nearly constant time. Instead of scanning the whole MTD device it 3416ff94bc40SHeiko Schocher only has to locate a checkpoint (called fastmap) on the device. 3417ff94bc40SHeiko Schocher The on-flash fastmap contains all information needed to attach 3418ff94bc40SHeiko Schocher the device. Using fastmap makes only sense on large devices where 3419ff94bc40SHeiko Schocher attaching by scanning takes long. UBI will not automatically install 3420ff94bc40SHeiko Schocher a fastmap on old images, but you can set the UBI parameter 3421ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT to 1 if you want so. Please note 3422ff94bc40SHeiko Schocher that fastmap-enabled images are still usable with UBI implementations 3423ff94bc40SHeiko Schocher without fastmap support. On typical flash devices the whole fastmap 3424ff94bc40SHeiko Schocher fits into one PEB. UBI will reserve PEBs to hold two fastmaps. 3425ff94bc40SHeiko Schocher 3426ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 3427ff94bc40SHeiko Schocher Set this parameter to enable fastmap automatically on images 3428ff94bc40SHeiko Schocher without a fastmap. 3429ff94bc40SHeiko Schocher default: 0 3430ff94bc40SHeiko Schocher 343170c219cdSJoe Hershberger- UBIFS support 343270c219cdSJoe Hershberger CONFIG_CMD_UBIFS 343370c219cdSJoe Hershberger 343470c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 343570c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 343670c219cdSJoe Hershberger 343770c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 343870c219cdSJoe Hershberger 3439147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3440147162daSJoe Hershberger 3441147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3442147162daSJoe Hershberger warnings and errors enabled. 3443147162daSJoe Hershberger 34446a11cf48SDaniel Schwierzeck- SPL framework 34456a11cf48SDaniel Schwierzeck CONFIG_SPL 34466a11cf48SDaniel Schwierzeck Enable building of SPL globally. 34476a11cf48SDaniel Schwierzeck 344895579793STom Rini CONFIG_SPL_LDSCRIPT 344995579793STom Rini LDSCRIPT for linking the SPL binary. 345095579793STom Rini 34516ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 34526ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 34536ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 34546ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 34558960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 34566ebc3461SAlbert ARIBAUD must not be both defined at the same time. 34576ebc3461SAlbert ARIBAUD 345895579793STom Rini CONFIG_SPL_MAX_SIZE 34596ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 34606ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 34616ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 34626ebc3461SAlbert ARIBAUD not exceed it. 346395579793STom Rini 34646a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 34656a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 34666a11cf48SDaniel Schwierzeck 346794a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 346894a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 346994a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 347094a45bb1SScott Wood 347195579793STom Rini CONFIG_SPL_BSS_START_ADDR 347295579793STom Rini Link address for the BSS within the SPL binary. 347395579793STom Rini 347495579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 34756ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 34766ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 34776ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 34788960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 34796ebc3461SAlbert ARIBAUD must not be both defined at the same time. 348095579793STom Rini 348195579793STom Rini CONFIG_SPL_STACK 348295579793STom Rini Adress of the start of the stack SPL will use 348395579793STom Rini 348494a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 348594a45bb1SScott Wood Adress of the start of the stack SPL will use after 348694a45bb1SScott Wood relocation. If unspecified, this is equal to 348794a45bb1SScott Wood CONFIG_SPL_STACK. 348894a45bb1SScott Wood 348995579793STom Rini CONFIG_SYS_SPL_MALLOC_START 349095579793STom Rini Starting address of the malloc pool used in SPL. 349195579793STom Rini 349295579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 349395579793STom Rini The size of the malloc pool used in SPL. 34946a11cf48SDaniel Schwierzeck 349547f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 349647f7bcaeSTom Rini Enable the SPL framework under common/. This framework 349747f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 349847f7bcaeSTom Rini NAND loading of the Linux Kernel. 349947f7bcaeSTom Rini 35009607faf2STom Rini CONFIG_SPL_OS_BOOT 35019607faf2STom Rini Enable booting directly to an OS from SPL. 35029607faf2STom Rini See also: doc/README.falcon 35039607faf2STom Rini 3504861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3505861a86f4STom Rini For ARM, enable an optional function to print more information 3506861a86f4STom Rini about the running system. 3507861a86f4STom Rini 35084b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 35094b919725SScott Wood Arch init code should be built for a very small image 35104b919725SScott Wood 35116a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 35126a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 35136a11cf48SDaniel Schwierzeck 35146a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 35156a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 35166a11cf48SDaniel Schwierzeck 35176a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 35186a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 35196a11cf48SDaniel Schwierzeck 35206a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 35216a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 35226a11cf48SDaniel Schwierzeck 35236a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 35246a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 35256a11cf48SDaniel Schwierzeck 352695579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 352795579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 352895579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 352995579793STom Rini Address, size and partition on the MMC to load U-Boot from 353095579793STom Rini when the MMC is being used in raw mode. 353195579793STom Rini 35322b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 35332b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 35342b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 35352b75b0adSPeter Korsgaard 35362b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 35372b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 35382b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 35392b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 35402b75b0adSPeter Korsgaard (for falcon mode) 35412b75b0adSPeter Korsgaard 354295579793STom Rini CONFIG_SPL_FAT_SUPPORT 354395579793STom Rini Support for fs/fat/libfat.o in SPL binary 354495579793STom Rini 354595579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 354695579793STom Rini Filename to read to load U-Boot when reading from FAT 354795579793STom Rini 35487ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 35497ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 35507ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 35517ad2cc79SPeter Korsgaard 35527ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 35537ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 35547ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 35557ad2cc79SPeter Korsgaard 355606f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 355706f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 355806f60ae3SScott Wood start.S waits for the rest of the SPL to load before 355906f60ae3SScott Wood continuing (the hardware starts execution after just 356006f60ae3SScott Wood loading the first page rather than the full 4K). 356106f60ae3SScott Wood 3562651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3563651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3564651fcf60SPrabhakar Kushwaha 35656f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 35666f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 35676f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 35686f2f01b9SScott Wood 35696f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 35706f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 35716f2f01b9SScott Wood 35726f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 35736f2f01b9SScott Wood Include standard software ECC in the SPL 35746f2f01b9SScott Wood 357595579793STom Rini CONFIG_SPL_NAND_SIMPLE 35767d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 35777d4b7955SScott Wood expose the cmd_ctrl() interface. 357895579793STom Rini 35796dd3b566STom Rini CONFIG_SPL_MTD_SUPPORT 35806dd3b566STom Rini Support for the MTD subsystem within SPL. Useful for 35816dd3b566STom Rini environment on NAND support within SPL. 35826dd3b566STom Rini 3583bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3584bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 35855614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3586bb0dc108SYing Zhang 35877c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 35887c8eea59SYing Zhang Set for common ddr init with serial presence detect in 35897c8eea59SYing Zhang SPL binary. 35907c8eea59SYing Zhang 359195579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 359295579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 359395579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 359495579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 359595579793STom Rini CONFIG_SYS_NAND_ECCBYTES 359695579793STom Rini Defines the size and behavior of the NAND that SPL uses 35977d4b7955SScott Wood to read U-Boot 359895579793STom Rini 3599fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3600fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3601fbe76ae4SPrabhakar Kushwaha 360295579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 36037d4b7955SScott Wood Location in NAND to read U-Boot from 36047d4b7955SScott Wood 36057d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 36067d4b7955SScott Wood Location in memory to load U-Boot to 36077d4b7955SScott Wood 36087d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 36097d4b7955SScott Wood Size of image to load 361095579793STom Rini 361195579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 36127d4b7955SScott Wood Entry point in loaded image to jump to 361395579793STom Rini 361495579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 361595579793STom Rini Define this if you need to first read the OOB and then the 361695579793STom Rini data. This is used for example on davinci plattforms. 361795579793STom Rini 361895579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 361995579793STom Rini Support for an OMAP3-specific set of functions to return the 362095579793STom Rini ID and MFR of the first attached NAND chip, if present. 362195579793STom Rini 36226a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 36236a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 36246a11cf48SDaniel Schwierzeck 36256a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 36266a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 36276a11cf48SDaniel Schwierzeck 36286a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 36296a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 36306a11cf48SDaniel Schwierzeck 3631c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3632c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3633c57b953dSPavel Machek 36346a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 36356a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 36361372cce2SMarian Balakowicz 3637ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3638ba1bee43SYing Zhang Support for the environment operating in SPL binary 3639ba1bee43SYing Zhang 3640ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3641ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3642ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3643ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3644ba1bee43SYing Zhang 364574752baaSScott Wood CONFIG_SPL_PAD_TO 36466113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 36476113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 36486113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36496113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36506113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 365174752baaSScott Wood 3652ca2fca22SScott Wood CONFIG_SPL_TARGET 3653ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3654ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3655ca2fca22SScott Wood example if more than one image needs to be produced. 3656ca2fca22SScott Wood 365787ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 365887ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 365987ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 366087ebee39SSimon Glass option to re-enable it. This will affect the output of the 366187ebee39SSimon Glass bootm command when booting a FIT image. 366287ebee39SSimon Glass 36633aa29de0SYing Zhang- TPL framework 36643aa29de0SYing Zhang CONFIG_TPL 36653aa29de0SYing Zhang Enable building of TPL globally. 36663aa29de0SYing Zhang 36673aa29de0SYing Zhang CONFIG_TPL_PAD_TO 36683aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 36693aa29de0SYing Zhang the TPL payload. By default, this is defined as 36703aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36713aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36723aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 36733aa29de0SYing Zhang 3674c609719bSwdenkModem Support: 3675c609719bSwdenk-------------- 3676c609719bSwdenk 3677566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3678c609719bSwdenk 367911ccc33fSMarcel Ziswiler- Modem support enable: 3680c609719bSwdenk CONFIG_MODEM_SUPPORT 3681c609719bSwdenk 3682c609719bSwdenk- RTS/CTS Flow control enable: 3683c609719bSwdenk CONFIG_HWFLOW 3684c609719bSwdenk 3685c609719bSwdenk- Modem debug support: 3686c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3687c609719bSwdenk 3688c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3689c609719bSwdenk for modem support. Useful only with BDI2000. 3690c609719bSwdenk 3691a8c7c708Swdenk- Interrupt support (PPC): 3692a8c7c708Swdenk 3693a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3694a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 369511ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3696a8c7c708Swdenk should set decrementer_count to appropriate value. If 369711ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3698a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 369911ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3700a8c7c708Swdenk specific handling. If board has watchdog / status_led 3701a8c7c708Swdenk / other_activity_monitor it works automatically from 3702a8c7c708Swdenk general timer_interrupt(). 3703a8c7c708Swdenk 3704c609719bSwdenk- General: 3705c609719bSwdenk 3706c609719bSwdenk In the target system modem support is enabled when a 3707c609719bSwdenk specific key (key combination) is pressed during 3708c609719bSwdenk power-on. Otherwise U-Boot will boot normally 370911ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3710c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3711c609719bSwdenk function, returning 1 and thus enabling modem 3712c609719bSwdenk initialization. 3713c609719bSwdenk 3714c609719bSwdenk If there are no modem init strings in the 3715c609719bSwdenk environment, U-Boot proceed to autoboot; the 3716c609719bSwdenk previous output (banner, info printfs) will be 371711ccc33fSMarcel Ziswiler suppressed, though. 3718c609719bSwdenk 3719c609719bSwdenk See also: doc/README.Modem 3720c609719bSwdenk 37219660e442SHelmut RaigerBoard initialization settings: 37229660e442SHelmut Raiger------------------------------ 37239660e442SHelmut Raiger 37249660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 37259660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 37269660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 37279660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 37289660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 37299660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 37309660e442SHelmut Raiger 37319660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 37329660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 37339660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 37349660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3735c609719bSwdenk 3736c609719bSwdenkConfiguration Settings: 3737c609719bSwdenk----------------------- 3738c609719bSwdenk 37394d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 37404d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 37414d1fd7f1SYork Sun 37426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3743c609719bSwdenk undefine this when you're short of memory. 3744c609719bSwdenk 37452fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 37462fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 37472fb2604dSPeter Tyser 37486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3749c609719bSwdenk prompt for user input. 3750c609719bSwdenk 37516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3752c609719bSwdenk 37536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3754c609719bSwdenk 37556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3756c609719bSwdenk 37576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3758c609719bSwdenk the application (usually a Linux kernel) when it is 3759c609719bSwdenk booted 3760c609719bSwdenk 37616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3762c609719bSwdenk List of legal baudrate settings for this board. 3763c609719bSwdenk 37646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3765c609719bSwdenk Suppress display of console information at boot. 3766c609719bSwdenk 37676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3768c609719bSwdenk If the board specific function 3769c609719bSwdenk extern int overwrite_console (void); 3770c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3771c609719bSwdenk serial port, else the settings in the environment are used. 3772c609719bSwdenk 37736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3774c609719bSwdenk Enable the call to overwrite_console(). 3775c609719bSwdenk 37766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3777c609719bSwdenk Enable overwrite of previous console environment settings. 3778c609719bSwdenk 37796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3780c609719bSwdenk Begin and End addresses of the area used by the 3781c609719bSwdenk simple memory test. 3782c609719bSwdenk 37836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3784c609719bSwdenk Enable an alternate, more extensive memory test. 3785c609719bSwdenk 37866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 37875f535fe1Swdenk Scratch address used by the alternate memory test 37885f535fe1Swdenk You only need to set this if address zero isn't writeable 37895f535fe1Swdenk 37906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 37916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 379214f73ca6SStefan Roese this specified memory area will get subtracted from the top 379311ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 379414f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 379514f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 379614f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 37975e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 379814f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 37995e12e75dSStefan Roese will have to get fixed in Linux additionally. 380014f73ca6SStefan Roese 380114f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 380214f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 380314f73ca6SStefan Roese be touched. 380414f73ca6SStefan Roese 380514f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 380614f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 380714f73ca6SStefan Roese then the end address of the Linux memory will be located at a 380814f73ca6SStefan Roese non page size aligned address and this could cause major 380914f73ca6SStefan Roese problems. 381014f73ca6SStefan Roese 38116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3812c609719bSwdenk Enable temporary baudrate change while serial download 3813c609719bSwdenk 38146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3815c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3816c609719bSwdenk 38176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3818c609719bSwdenk Physical start address of Motherboard I/O (if using a 3819c609719bSwdenk Cogent motherboard) 3820c609719bSwdenk 38216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3822c609719bSwdenk Physical start address of Flash memory. 3823c609719bSwdenk 38246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3825c609719bSwdenk Physical start address of boot monitor code (set by 3826c609719bSwdenk make config files to be same as the text base address 382714d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 38286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3829c609719bSwdenk 38306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 38313b57fe0aSwdenk Size of memory reserved for monitor code, used to 38323b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 38333b57fe0aSwdenk embedded within the U-Boot image, or in a separate 38343b57fe0aSwdenk flash sector. 3835c609719bSwdenk 38366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3837c609719bSwdenk Size of DRAM reserved for malloc() use. 3838c609719bSwdenk 3839d59476b6SSimon Glass- CONFIG_SYS_MALLOC_F_LEN 3840d59476b6SSimon Glass Size of the malloc() pool for use before relocation. If 3841d59476b6SSimon Glass this is defined, then a very simple malloc() implementation 3842d59476b6SSimon Glass will become available before relocation. The address is just 3843d59476b6SSimon Glass below the global data, and the stack is moved down to make 3844d59476b6SSimon Glass space. 3845d59476b6SSimon Glass 3846d59476b6SSimon Glass This feature allocates regions with increasing addresses 3847d59476b6SSimon Glass within the region. calloc() is supported, but realloc() 3848d59476b6SSimon Glass is not available. free() is supported but does nothing. 3849d59476b6SSimon Glass The memory will be freed (or in fact just forgotton) when 3850d59476b6SSimon Glass U-Boot relocates itself. 3851d59476b6SSimon Glass 3852*e7b14e9aSSimon Glass Pre-relocation malloc() is only supported on ARM and sandbox 385329afe9e6SSimon Glass at present but is fairly easy to enable for other archs. 385429afe9e6SSimon Glass 38556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 385615940c9aSStefan Roese Normally compressed uImages are limited to an 385715940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 38586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 385915940c9aSStefan Roese to adjust this setting to your needs. 3860c609719bSwdenk 38616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3862c609719bSwdenk Maximum size of memory mapped by the startup code of 3863c609719bSwdenk the Linux kernel; all data that must be processed by 38647d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 38657d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 38661bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 38677d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3868c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3869c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3870c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3871c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3872c609719bSwdenk 3873fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3874fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3875fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3876fca43cc8SJohn Rigby is enabled. 3877fca43cc8SJohn Rigby 3878fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3879fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3880fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3881fca43cc8SJohn Rigby 3882fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3883fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3884fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3885fca43cc8SJohn Rigby 38866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3887c609719bSwdenk Max number of Flash memory banks 3888c609719bSwdenk 38896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3890c609719bSwdenk Max number of sectors on a Flash chip 3891c609719bSwdenk 38926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3893c609719bSwdenk Timeout for Flash erase operations (in ms) 3894c609719bSwdenk 38956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3896c609719bSwdenk Timeout for Flash write operations (in ms) 3897c609719bSwdenk 38986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 38998564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 39008564acf9Swdenk 39016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 39028564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 39038564acf9Swdenk 39046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 39058564acf9Swdenk If defined, hardware flash sectors protection is used 39068564acf9Swdenk instead of U-Boot software protection. 39078564acf9Swdenk 39086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3909c609719bSwdenk 3910c609719bSwdenk Enable TFTP transfers directly to flash memory; 3911c609719bSwdenk without this option such a download has to be 3912c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3913c609719bSwdenk copy from RAM to flash. 3914c609719bSwdenk 3915c609719bSwdenk The two-step approach is usually more reliable, since 3916c609719bSwdenk you can check if the download worked before you erase 391711ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 391811ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3919c609719bSwdenk downloaded image) this option may be very useful. 3920c609719bSwdenk 39216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3922c609719bSwdenk Define if the flash driver uses extra elements in the 39235653fc33Swdenk common flash structure for storing flash geometry. 39245653fc33Swdenk 392500b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 39265653fc33Swdenk This option also enables the building of the cfi_flash driver 39275653fc33Swdenk in the drivers directory 392853cf9435Sstroese 392991809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 393091809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 393191809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 393291809ed5SPiotr Ziecik to the MTD layer. 393391809ed5SPiotr Ziecik 39346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 393596ef831fSGuennadi Liakhovetski Use buffered writes to flash. 393696ef831fSGuennadi Liakhovetski 393796ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 393896ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 393996ef831fSGuennadi Liakhovetski write commands. 394096ef831fSGuennadi Liakhovetski 39416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 39425568e613SStefan Roese If this option is defined, the common CFI flash doesn't 39435568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 39445568e613SStefan Roese is useful, if some of the configured banks are only 39455568e613SStefan Roese optionally available. 39465568e613SStefan Roese 39479a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 39489a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 39499a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 39509a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 39519a042e9cSJerry Van Baren 3952352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3953352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3954352ef3f1SStefan Roese against the source after the write operation. An error message 3955352ef3f1SStefan Roese will be printed when the contents are not identical. 3956352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3957352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3958352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3959352ef3f1SStefan Roese this option if you really know what you are doing. 3960352ef3f1SStefan Roese 39616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 396211ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 396311ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 396453cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 396553cf9435Sstroese buffers can be full shortly after enabling the interface 396611ccc33fSMarcel Ziswiler on high Ethernet traffic. 396753cf9435Sstroese Defaults to 4 if not defined. 3968c609719bSwdenk 3969ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3970ea882bafSWolfgang Denk 3971ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3972ea882bafSWolfgang Denk internally to store the environment settings. The default 3973ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3974ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3975ea882bafSWolfgang Denk lib/hashtable.c for details. 3976ea882bafSWolfgang Denk 39772598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 39782598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 39791bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 39802598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 39812598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 39822598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 39832598090bSJoe Hershberger 39842598090bSJoe Hershberger The format of the list is: 39852598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3986267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3987267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 39882598090bSJoe Hershberger entry = variable_name[:attributes] 39892598090bSJoe Hershberger list = entry[,list] 39902598090bSJoe Hershberger 39912598090bSJoe Hershberger The type attributes are: 39922598090bSJoe Hershberger s - String (default) 39932598090bSJoe Hershberger d - Decimal 39942598090bSJoe Hershberger x - Hexadecimal 39952598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 39962598090bSJoe Hershberger i - IP address 39972598090bSJoe Hershberger m - MAC address 39982598090bSJoe Hershberger 3999267541f7SJoe Hershberger The access attributes are: 4000267541f7SJoe Hershberger a - Any (default) 4001267541f7SJoe Hershberger r - Read-only 4002267541f7SJoe Hershberger o - Write-once 4003267541f7SJoe Hershberger c - Change-default 4004267541f7SJoe Hershberger 40052598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 40062598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 40072598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 40082598090bSJoe Hershberger 40092598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 40102598090bSJoe Hershberger Define this to a list (string) to define validation that 40112598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 40122598090bSJoe Hershberger environment variable. To override a setting in the static 40132598090bSJoe Hershberger list, simply add an entry for the same variable name to the 40142598090bSJoe Hershberger ".flags" variable. 40152598090bSJoe Hershberger 4016267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 4017267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 4018267541f7SJoe Hershberger access flags. 4019267541f7SJoe Hershberger 40205c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 40215c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 40225c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 40235c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 40245c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 40255c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 40265c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 40275c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 40285c1a7ea6SSimon Glass your board please report the problem and send patches! 40295c1a7ea6SSimon Glass 40300b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 40310b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 40320b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 40330b1b60c7SLokesh Vutla the value can be calulated on a given board. 4034632efa74SSimon Glass 4035c609719bSwdenkThe following definitions that deal with the placement and management 4036c609719bSwdenkof environment data (variable area); in general, we support the 4037c609719bSwdenkfollowing configurations: 4038c609719bSwdenk 4039c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 4040c3eb3fe4SMike Frysinger 4041c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 4042c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 4043c3eb3fe4SMike Frysinger 40445a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 4045c609719bSwdenk 4046c609719bSwdenk Define this if the environment is in flash memory. 4047c609719bSwdenk 4048c609719bSwdenk a) The environment occupies one whole flash sector, which is 4049c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 4050c609719bSwdenk happens usually with "bottom boot sector" or "top boot 4051c609719bSwdenk sector" type flash chips, which have several smaller 4052c609719bSwdenk sectors at the start or the end. For instance, such a 4053c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 4054c609719bSwdenk such a case you would place the environment in one of the 4055c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 4056c609719bSwdenk "top boot sector" type flash chips, you would put the 4057c609719bSwdenk environment in one of the last sectors, leaving a gap 4058c609719bSwdenk between U-Boot and the environment. 4059c609719bSwdenk 40600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 4061c609719bSwdenk 4062c609719bSwdenk Offset of environment data (variable area) to the 4063c609719bSwdenk beginning of flash memory; for instance, with bottom boot 4064c609719bSwdenk type flash chips the second sector can be used: the offset 4065c609719bSwdenk for this sector is given here. 4066c609719bSwdenk 40676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 4068c609719bSwdenk 40690e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 4070c609719bSwdenk 4071c609719bSwdenk This is just another way to specify the start address of 4072c609719bSwdenk the flash sector containing the environment (instead of 40730e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 4074c609719bSwdenk 40750e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 4076c609719bSwdenk 4077c609719bSwdenk Size of the sector containing the environment. 4078c609719bSwdenk 4079c609719bSwdenk 4080c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 4081c609719bSwdenk In such a case you don't want to spend a whole sector for 4082c609719bSwdenk the environment. 4083c609719bSwdenk 40840e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4085c609719bSwdenk 40865a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 40870e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 4088c609719bSwdenk of this flash sector for the environment. This saves 4089c609719bSwdenk memory for the RAM copy of the environment. 4090c609719bSwdenk 4091c609719bSwdenk It may also save flash memory if you decide to use this 4092c609719bSwdenk when your environment is "embedded" within U-Boot code, 4093c609719bSwdenk since then the remainder of the flash sector could be used 4094c609719bSwdenk for U-Boot code. It should be pointed out that this is 4095c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 4096c609719bSwdenk updating the environment in flash makes it always 4097c609719bSwdenk necessary to erase the WHOLE sector. If something goes 4098c609719bSwdenk wrong before the contents has been restored from a copy in 4099c609719bSwdenk RAM, your target system will be dead. 4100c609719bSwdenk 41010e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 41020e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 4103c609719bSwdenk 4104c609719bSwdenk These settings describe a second storage area used to hold 410511ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 41063e38691eSwdenk a valid backup copy in case there is a power failure during 4107c609719bSwdenk a "saveenv" operation. 4108c609719bSwdenk 4109c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 4110c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 4111c609719bSwdenkaccordingly! 4112c609719bSwdenk 4113c609719bSwdenk 41149314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 4115c609719bSwdenk 4116c609719bSwdenk Define this if you have some non-volatile memory device 4117c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 4118c609719bSwdenk environment. 4119c609719bSwdenk 41200e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 41210e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4122c609719bSwdenk 412311ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 4124c609719bSwdenk want to use for environment. It is assumed that this memory 4125c609719bSwdenk can just be read and written to, without any special 4126c609719bSwdenk provision. 4127c609719bSwdenk 4128c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 4129c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 413011ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 4131c609719bSwdenkU-Boot will hang. 4132c609719bSwdenk 4133c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 4134c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 4135c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 4136c609719bSwdenkto save the current settings. 4137c609719bSwdenk 4138c609719bSwdenk 4139bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 4140c609719bSwdenk 4141c609719bSwdenk Use this if you have an EEPROM or similar serial access 4142c609719bSwdenk device and a driver for it. 4143c609719bSwdenk 41440e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 41450e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4146c609719bSwdenk 4147c609719bSwdenk These two #defines specify the offset and size of the 4148c609719bSwdenk environment area within the total memory of your EEPROM. 4149c609719bSwdenk 41506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 4151c609719bSwdenk If defined, specified the chip address of the EEPROM device. 4152c609719bSwdenk The default address is zero. 4153c609719bSwdenk 41546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 4155c609719bSwdenk If defined, the number of bits used to address bytes in a 4156c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 4157c609719bSwdenk would require six bits. 4158c609719bSwdenk 41596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 4160c609719bSwdenk If defined, the number of milliseconds to delay between 4161c609719bSwdenk page writes. The default is zero milliseconds. 4162c609719bSwdenk 41636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 4164c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 4165c609719bSwdenk that this is NOT the chip address length! 4166c609719bSwdenk 41676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 41685cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 41695cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 41705cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 41715cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 41725cf91d6bSwdenk byte chips. 41735cf91d6bSwdenk 41745cf91d6bSwdenk Note that we consider the length of the address field to 41755cf91d6bSwdenk still be one byte because the extra address bits are hidden 41765cf91d6bSwdenk in the chip address. 41775cf91d6bSwdenk 41786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 4179c609719bSwdenk The size in bytes of the EEPROM device. 4180c609719bSwdenk 4181548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 4182548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 4183548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 4184548738b4SHeiko Schocher 4185548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 4186548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 4187548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 4188548738b4SHeiko Schocher EEPROM. For example: 4189548738b4SHeiko Schocher 4190ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 4191548738b4SHeiko Schocher 4192548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 4193548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 4194c609719bSwdenk 4195057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 41965779d8d9Swdenk 41975779d8d9Swdenk Define this if you have a DataFlash memory device which you 41985779d8d9Swdenk want to use for the environment. 41995779d8d9Swdenk 42000e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 42010e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 42020e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 42035779d8d9Swdenk 42045779d8d9Swdenk These three #defines specify the offset and size of the 42055779d8d9Swdenk environment area within the total memory of your DataFlash placed 42065779d8d9Swdenk at the specified address. 42075779d8d9Swdenk 4208bd83b592SWu, Josh- CONFIG_ENV_IS_IN_SPI_FLASH: 4209bd83b592SWu, Josh 4210bd83b592SWu, Josh Define this if you have a SPI Flash memory device which you 4211bd83b592SWu, Josh want to use for the environment. 4212bd83b592SWu, Josh 4213bd83b592SWu, Josh - CONFIG_ENV_OFFSET: 4214bd83b592SWu, Josh - CONFIG_ENV_SIZE: 4215bd83b592SWu, Josh 4216bd83b592SWu, Josh These two #defines specify the offset and size of the 4217bd83b592SWu, Josh environment area within the SPI Flash. CONFIG_ENV_OFFSET must be 4218bd83b592SWu, Josh aligned to an erase sector boundary. 4219bd83b592SWu, Josh 4220bd83b592SWu, Josh - CONFIG_ENV_SECT_SIZE: 4221bd83b592SWu, Josh 4222bd83b592SWu, Josh Define the SPI flash's sector size. 4223bd83b592SWu, Josh 4224bd83b592SWu, Josh - CONFIG_ENV_OFFSET_REDUND (optional): 4225bd83b592SWu, Josh 4226bd83b592SWu, Josh This setting describes a second storage area of CONFIG_ENV_SIZE 4227bd83b592SWu, Josh size used to hold a redundant copy of the environment data, so 4228bd83b592SWu, Josh that there is a valid backup copy in case there is a power failure 4229bd83b592SWu, Josh during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4230bd83b592SWu, Josh aligned to an erase sector boundary. 4231bd83b592SWu, Josh 4232bd83b592SWu, Josh - CONFIG_ENV_SPI_BUS (optional): 4233bd83b592SWu, Josh - CONFIG_ENV_SPI_CS (optional): 4234bd83b592SWu, Josh 4235bd83b592SWu, Josh Define the SPI bus and chip select. If not defined they will be 0. 4236bd83b592SWu, Josh 4237bd83b592SWu, Josh - CONFIG_ENV_SPI_MAX_HZ (optional): 4238bd83b592SWu, Josh 4239bd83b592SWu, Josh Define the SPI max work clock. If not defined then use 1MHz. 4240bd83b592SWu, Josh 4241bd83b592SWu, Josh - CONFIG_ENV_SPI_MODE (optional): 4242bd83b592SWu, Josh 4243bd83b592SWu, Josh Define the SPI work mode. If not defined then use SPI_MODE_3. 4244bd83b592SWu, Josh 42450a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 42460a85a9e7SLiu Gang 42470a85a9e7SLiu Gang Define this if you have a remote memory space which you 42480a85a9e7SLiu Gang want to use for the local device's environment. 42490a85a9e7SLiu Gang 42500a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 42510a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 42520a85a9e7SLiu Gang 42530a85a9e7SLiu Gang These two #defines specify the address and size of the 42540a85a9e7SLiu Gang environment area within the remote memory space. The 42550a85a9e7SLiu Gang local device can get the environment from remote memory 4256fc54c7faSLiu Gang space by SRIO or PCIE links. 42570a85a9e7SLiu Gang 42580a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 42590a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 4260fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4261fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 42620a85a9e7SLiu Gang 426351bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 426413a5695bSwdenk 426513a5695bSwdenk Define this if you have a NAND device which you want to use 426613a5695bSwdenk for the environment. 426713a5695bSwdenk 42680e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 42690e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 427013a5695bSwdenk 427113a5695bSwdenk These two #defines specify the offset and size of the environment 4272fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4273fdd813deSScott Wood aligned to an erase block boundary. 42745779d8d9Swdenk 4275fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4276e443c944SMarkus Klotzbuecher 42770e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4278fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4279fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4280fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4281fdd813deSScott Wood aligned to an erase block boundary. 4282e443c944SMarkus Klotzbuecher 4283fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4284fdd813deSScott Wood 4285fdd813deSScott Wood Specifies the length of the region in which the environment 4286fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4287fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4288fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4289fdd813deSScott Wood the range to be avoided. 4290fdd813deSScott Wood 4291fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4292fdd813deSScott Wood 4293fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4294fdd813deSScott Wood environment from block zero's out-of-band data. The 4295fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4296fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4297fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4298e443c944SMarkus Klotzbuecher 4299b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4300b74ab737SGuennadi Liakhovetski 4301b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4302b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4303b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4304b74ab737SGuennadi Liakhovetski 43052b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 43062b74433fSJoe Hershberger 43072b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 43082b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 43092b74433fSJoe Hershberger accesses, which is important on NAND. 43102b74433fSJoe Hershberger 43112b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 43122b74433fSJoe Hershberger 43132b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 43142b74433fSJoe Hershberger 43152b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 43162b74433fSJoe Hershberger 43172b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 43182b74433fSJoe Hershberger environment in. 43192b74433fSJoe Hershberger 4320785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4321785881f7SJoe Hershberger 4322785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4323785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4324785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4325785881f7SJoe Hershberger 43262b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 43272b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 43282b74433fSJoe Hershberger 43292b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 43302b74433fSJoe Hershberger when storing the env in UBI. 43312b74433fSJoe Hershberger 4332d1db76f1SWu, Josh- CONFIG_ENV_IS_IN_FAT: 4333d1db76f1SWu, Josh Define this if you want to use the FAT file system for the environment. 4334d1db76f1SWu, Josh 4335d1db76f1SWu, Josh - FAT_ENV_INTERFACE: 4336d1db76f1SWu, Josh 4337d1db76f1SWu, Josh Define this to a string that is the name of the block device. 4338d1db76f1SWu, Josh 4339d1db76f1SWu, Josh - FAT_ENV_DEV_AND_PART: 4340d1db76f1SWu, Josh 4341d1db76f1SWu, Josh Define this to a string to specify the partition of the device. It can 4342d1db76f1SWu, Josh be as following: 4343d1db76f1SWu, Josh 4344d1db76f1SWu, Josh "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1) 4345d1db76f1SWu, Josh - "D:P": device D partition P. Error occurs if device D has no 4346d1db76f1SWu, Josh partition table. 4347d1db76f1SWu, Josh - "D:0": device D. 4348d1db76f1SWu, Josh - "D" or "D:": device D partition 1 if device D has partition 4349d1db76f1SWu, Josh table, or the whole device D if has no partition 4350d1db76f1SWu, Josh table. 4351d1db76f1SWu, Josh - "D:auto": first partition in device D with bootable flag set. 4352d1db76f1SWu, Josh If none, first valid paratition in device D. If no 4353d1db76f1SWu, Josh partition table then means device D. 4354d1db76f1SWu, Josh 4355d1db76f1SWu, Josh - FAT_ENV_FILE: 4356d1db76f1SWu, Josh 4357d1db76f1SWu, Josh It's a string of the FAT file name. This file use to store the 4358d1db76f1SWu, Josh envrionment. 4359d1db76f1SWu, Josh 4360d1db76f1SWu, Josh - CONFIG_FAT_WRITE: 4361d1db76f1SWu, Josh This should be defined. Otherwise it cannot save the envrionment file. 4362d1db76f1SWu, Josh 436306e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 436406e4ae5fSStephen Warren 436506e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 436606e4ae5fSStephen Warren environment. 436706e4ae5fSStephen Warren 436806e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 436906e4ae5fSStephen Warren 437006e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 437106e4ae5fSStephen Warren 437206e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 437306e4ae5fSStephen Warren 437406e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 437506e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 437606e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 437706e4ae5fSStephen Warren 437806e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 437906e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 438006e4ae5fSStephen Warren 438106e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 438206e4ae5fSStephen Warren area within the specified MMC device. 438306e4ae5fSStephen Warren 43845c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 43855c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 43865c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 43875c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 43885c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 43895c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 43905c088ee8SStephen Warren maximum possible space before it, to store other data. 43915c088ee8SStephen Warren 439206e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 439306e4ae5fSStephen Warren MMC sector boundary. 439406e4ae5fSStephen Warren 439506e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 439606e4ae5fSStephen Warren 439706e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 439806e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 439906e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 440006e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 440106e4ae5fSStephen Warren 44025c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 44035c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 44045c088ee8SStephen Warren 440506e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 440606e4ae5fSStephen Warren an MMC sector boundary. 440706e4ae5fSStephen Warren 440806e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 440906e4ae5fSStephen Warren 441006e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 441106e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 441206e4ae5fSStephen Warren CONFIG_ENV_SIZE. 441306e4ae5fSStephen Warren 44146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4415c609719bSwdenk 4416c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4417c609719bSwdenk area is used at an early stage (ROM part) if the environment 4418c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4419c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4420c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4421c609719bSwdenk to be a good choice since it makes it far enough from the 4422c609719bSwdenk start of the data area as well as from the stack pointer. 4423c609719bSwdenk 4424e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4425c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4426cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4427c609719bSwdenkuntil then to read environment variables. 4428c609719bSwdenk 442985ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 443085ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 443185ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 443285ec0bccSwdenknecessary, because the first environment variable we need is the 443385ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 443485ec0bccSwdenkhave any device yet where we could complain.] 4435c609719bSwdenk 4436c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4437c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 443885ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4439c609719bSwdenk 44406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4441fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4442fc3e2165Swdenk 44436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4444fc3e2165Swdenk also needs to be defined. 4445fc3e2165Swdenk 44466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4447fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4448c609719bSwdenk 4449f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4450f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4451f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4452f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4453f5675aa5SRon Madrid space for already greatly restricted images, including but not 4454f5675aa5SRon Madrid limited to NAND_SPL configurations. 4455f5675aa5SRon Madrid 4456b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4457b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4458b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4459b2b92f53SSimon Glass to do this. 4460b2b92f53SSimon Glass 4461e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4462e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4463e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4464e2e3e2b1SSimon Glass present. 4465e2e3e2b1SSimon Glass 4466feb85801SSascha Silbe- CONFIG_BOARD_SIZE_LIMIT: 4467feb85801SSascha Silbe Maximum size of the U-Boot image. When defined, the 4468feb85801SSascha Silbe build system checks that the actual size does not 4469feb85801SSascha Silbe exceed it. 4470feb85801SSascha Silbe 4471c609719bSwdenkLow Level (hardware related) configuration options: 4472dc7c9a1aSwdenk--------------------------------------------------- 4473c609719bSwdenk 44746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4475c609719bSwdenk Cache Line Size of the CPU. 4476c609719bSwdenk 44776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4478c609719bSwdenk Default address of the IMMR after system reset. 44792535d602Swdenk 44802535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 44812535d602Swdenk and RPXsuper) to be able to adjust the position of 44822535d602Swdenk the IMMR register after a reset. 4483c609719bSwdenk 4484e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4485e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4486e46fedfeSTimur Tabi PowerPC SOCs. 4487e46fedfeSTimur Tabi 4488e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4489e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4490e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4491e46fedfeSTimur Tabi 4492e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4493e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4494e46fedfeSTimur Tabi 4495e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4496e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4497e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4498e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4499e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4500e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4501e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4502e46fedfeSTimur Tabi 4503e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4504e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4505e46fedfeSTimur Tabi 4506e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4507e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4508e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4509e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4510e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4511e46fedfeSTimur Tabi 4512e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4513e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4514e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4515e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4516e46fedfeSTimur Tabi 4517e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4518e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4519e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4520e46fedfeSTimur Tabi 45217f6c2cbcSwdenk- Floppy Disk Support: 45226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 45237f6c2cbcSwdenk 45247f6c2cbcSwdenk the default drive number (default value 0) 45257f6c2cbcSwdenk 45266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 45277f6c2cbcSwdenk 452811ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 45297f6c2cbcSwdenk (default value 1) 45307f6c2cbcSwdenk 45316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 45327f6c2cbcSwdenk 45337f6c2cbcSwdenk defines the offset of register from address. It 45347f6c2cbcSwdenk depends on which part of the data bus is connected to 453511ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 45367f6c2cbcSwdenk 45376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 45386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 45397f6c2cbcSwdenk default value. 45407f6c2cbcSwdenk 45416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 45427f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 45437f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 45447f6c2cbcSwdenk source code. It is used to make hardware dependant 45457f6c2cbcSwdenk initializations. 45467f6c2cbcSwdenk 45470abddf82SMacpaul Lin- CONFIG_IDE_AHB: 45480abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 45490abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 45500abddf82SMacpaul Lin When software is doing ATA command and data transfer to 45510abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 45520abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 45530abddf82SMacpaul Lin is requierd. 45540abddf82SMacpaul Lin 45556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 455625d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 455725d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4558c609719bSwdenk 45596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4560c609719bSwdenk 45617152b1d0Swdenk Start address of memory area that can be used for 4562c609719bSwdenk initial data and stack; please note that this must be 4563c609719bSwdenk writable memory that is working WITHOUT special 4564c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4565c609719bSwdenk will become available only after programming the 4566c609719bSwdenk memory controller and running certain initialization 4567c609719bSwdenk sequences. 4568c609719bSwdenk 4569c609719bSwdenk U-Boot uses the following memory types: 4570c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4571c609719bSwdenk - MPC824X: data cache 4572c609719bSwdenk - PPC4xx: data cache 4573c609719bSwdenk 45746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4575c609719bSwdenk 4576c609719bSwdenk Offset of the initial data structure in the memory 45776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 45786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4579c609719bSwdenk data is located at the end of the available space 4580553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 45816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 45826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 45836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4584c609719bSwdenk 4585c609719bSwdenk Note: 4586c609719bSwdenk On the MPC824X (or other systems that use the data 4587c609719bSwdenk cache for initial memory) the address chosen for 45886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4589c609719bSwdenk point to an otherwise UNUSED address space between 4590c609719bSwdenk the top of RAM and the start of the PCI space. 4591c609719bSwdenk 45926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4593c609719bSwdenk 45946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4595c609719bSwdenk 45966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4597c609719bSwdenk 45986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4599c609719bSwdenk 46006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4601c609719bSwdenk 46026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4603c609719bSwdenk 46046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4605c609719bSwdenk SDRAM timing 4606c609719bSwdenk 46076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4608c609719bSwdenk periodic timer for refresh 4609c609719bSwdenk 46106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4611c609719bSwdenk 46126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 46136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 46146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 46156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4616c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4617c609719bSwdenk 4618c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 46196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 46206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4621c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4622c609719bSwdenk 46236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 46246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4625c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4626c609719bSwdenk Prescaler definitions (SDRAM timing) 4627c609719bSwdenk 46286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4629c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4630c609719bSwdenk define relocation offset in DPRAM [DSP2] 4631c609719bSwdenk 46326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4633b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4634b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4635b423d055SHeiko Schocher 46366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4637c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4638c609719bSwdenk define relocation offset in DPRAM [SCC4] 4639c609719bSwdenk 46406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4641c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4642c609719bSwdenk wrong setting might damage your board. Read 4643c609719bSwdenk doc/README.MBX before setting this variable! 4644c609719bSwdenk 46456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4646ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4647ea909b76Swdenk (Power On Self Tests). This definition overrides 4648ea909b76Swdenk #define'd default value in commproc.h resp. 4649ea909b76Swdenk cpm_8260.h. 4650ea909b76Swdenk 46516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 46526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 46536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 46546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 46556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 46566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 46576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 46586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4659a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 46605d232d0eSwdenk 46619cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 46629cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 46639cacf4fcSDirk Eibach required. 46649cacf4fcSDirk Eibach 466569fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 466669fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 466769fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 466869fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 466969fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 467069fd2d3bSAndrew Sharp by coreboot or similar. 467169fd2d3bSAndrew Sharp 4672842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4673842033e6SGabor Juhos Enable support for indirect PCI bridges. 4674842033e6SGabor Juhos 4675a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4676a09b9b68SKumar Gala Chip has SRIO or not 4677a09b9b68SKumar Gala 4678a09b9b68SKumar Gala- CONFIG_SRIO1: 4679a09b9b68SKumar Gala Board has SRIO 1 port available 4680a09b9b68SKumar Gala 4681a09b9b68SKumar Gala- CONFIG_SRIO2: 4682a09b9b68SKumar Gala Board has SRIO 2 port available 4683a09b9b68SKumar Gala 4684c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4685c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4686c8b28152SLiu Gang 4687a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4688a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4689a09b9b68SKumar Gala 4690a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4691a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4692a09b9b68SKumar Gala 4693a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4694a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4695a09b9b68SKumar Gala 469666bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 469766bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 469866bd1846SFabio Estevam a 16 bit bus. 469966bd1846SFabio Estevam Not all NAND drivers use this symbol. 4700a430e916SFabio Estevam Example of drivers that use it: 470166bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4702a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4703eced4626SAlex Waterman 4704eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4705eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4706eced4626SAlex Waterman a default value will be used. 4707eced4626SAlex Waterman 4708bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4709218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4710218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4711218ca724SWolfgang Denk 4712bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4713bb99ad6dSBen Warren I2C address of the SPD EEPROM 4714bb99ad6dSBen Warren 47156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4716218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4717218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4718218ca724SWolfgang Denk to something your driver can deal with. 4719bb99ad6dSBen Warren 47201b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 47211b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 47221b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 47231b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 47241b3e3c4fSYork Sun header files or board specific files. 47251b3e3c4fSYork Sun 47266f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 47276f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 47286f5e1dc5SYork Sun 47296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4730218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4731218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 47322ad6b513STimur Tabi 4733c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4734c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4735c26e454dSwdenk 4736c26e454dSwdenk- CONFIG_FEC[12]_PHY 4737c26e454dSwdenk Define to the hardcoded PHY address which corresponds 47386e592385Swdenk to the given FEC; i. e. 4739c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4740c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4741c26e454dSwdenk 4742c26e454dSwdenk When set to -1, means to probe for first available. 4743c26e454dSwdenk 4744c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4745c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4746c26e454dSwdenk (so program the FEC to ignore it). 4747c26e454dSwdenk 4748c26e454dSwdenk- CONFIG_RMII 4749c26e454dSwdenk Enable RMII mode for all FECs. 4750c26e454dSwdenk Note that this is a global option, we can't 4751c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4752c26e454dSwdenk 47535cf91d6bSwdenk- CONFIG_CRC32_VERIFY 47545cf91d6bSwdenk Add a verify option to the crc32 command. 47555cf91d6bSwdenk The syntax is: 47565cf91d6bSwdenk 47575cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 47585cf91d6bSwdenk 47595cf91d6bSwdenk Where address/count indicate a memory area 47605cf91d6bSwdenk and crc32 is the correct crc32 which the 47615cf91d6bSwdenk area should have. 47625cf91d6bSwdenk 476356523f12Swdenk- CONFIG_LOOPW 476456523f12Swdenk Add the "loopw" memory command. This only takes effect if 4765602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 476656523f12Swdenk 47677b466641Sstroese- CONFIG_MX_CYCLIC 47687b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 47697b466641Sstroese "md/mw" commands. 47707b466641Sstroese Examples: 47717b466641Sstroese 47727b466641Sstroese => mdc.b 10 4 500 47737b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 47747b466641Sstroese 47757b466641Sstroese => mwc.l 100 12345678 10 47767b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 47777b466641Sstroese 47787b466641Sstroese This only takes effect if the memory commands are activated 4779602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 47807b466641Sstroese 47818aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4782afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4783e03f3169SWolfgang Denk low level initializations (like setting up the memory 4784e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4785e03f3169SWolfgang Denk relocate itself into RAM. 47868aa1a2d1Swdenk 4787e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4788e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4789e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4790e03f3169SWolfgang Denk these initializations itself. 47918aa1a2d1Swdenk 4792401bb30bSAneesh V- CONFIG_SPL_BUILD 4793df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4794df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4795df81238bSMagnus Lilja compiling a NAND SPL. 4796400558b5Swdenk 47973aa29de0SYing Zhang- CONFIG_TPL_BUILD 47983aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 47993aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 48003aa29de0SYing Zhang It is loaded by the SPL. 48013aa29de0SYing Zhang 48025df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 48035df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 48045df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 48055df572f0SYing Zhang previous 4k of the .text section. 48065df572f0SYing Zhang 48074213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 48084213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 48094213fc29SSimon Glass effective address. It is therefore not necessary to regard 48104213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 48114213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 48124213fc29SSimon Glass it maintains its own little RAM buffer which contains all 48134213fc29SSimon Glass addressable memory. This option causes some memory accesses 48144213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 48154213fc29SSimon Glass 4816d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4817d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4818d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4819d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4820d8834a13SMatthias Weisser conditions but may increase the binary size. 4821d8834a13SMatthias Weisser 4822588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4823588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4824588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4825b16f521aSGabe Black 4826fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4827fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4828fc33705eSMark Jackson 4829fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 48305b5ece9eSGabe Black 483116678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 483216678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 483316678eb4SHeiko Schocher 4834999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 4835999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 4836999d7d32SKaricheri, Muralidharan driver that uses this: 4837999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 4838999d7d32SKaricheri, Muralidharan 4839f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4840f2717b47STimur Tabi----------------------------------- 4841f2717b47STimur Tabi 4842f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4843f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4844f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4845f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4846f2717b47STimur Tabiwithin that device. 4847f2717b47STimur Tabi 4848dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4849dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4850dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4851dcf1d774SZhao Qiang is also specified. 4852dcf1d774SZhao Qiang 4853dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4854dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4855f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4856f2717b47STimur Tabi is also specified. 4857f2717b47STimur Tabi 4858f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4859f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4860f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4861f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4862f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4863f2717b47STimur Tabi 4864f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4865f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4866f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4867f2717b47STimur Tabi virtual address in NOR flash. 4868f2717b47STimur Tabi 4869f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4870f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4871f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4872f2717b47STimur Tabi 4873f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4874f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4875f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4876f2717b47STimur Tabi 4877f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4878f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4879f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4880f2717b47STimur Tabi 4881292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4882292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4883292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4884fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4885fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4886fc54c7faSLiu Gang master's memory space. 4887f2717b47STimur Tabi 4888b940ca64SJ. German RiveraFreescale Layerscape Management Complex Firmware Support: 4889b940ca64SJ. German Rivera--------------------------------------------------------- 4890b940ca64SJ. German RiveraThe Freescale Layerscape Management Complex (MC) supports the loading of 4891b940ca64SJ. German Rivera"firmware". 4892b940ca64SJ. German RiveraThis firmware often needs to be loaded during U-Boot booting, so macros 4893b940ca64SJ. German Riveraare used to identify the storage device (NOR flash, SPI, etc) and the address 4894b940ca64SJ. German Riverawithin that device. 4895b940ca64SJ. German Rivera 4896b940ca64SJ. German Rivera- CONFIG_FSL_MC_ENET 4897b940ca64SJ. German Rivera Enable the MC driver for Layerscape SoCs. 4898b940ca64SJ. German Rivera 4899b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_ADDR 4900b940ca64SJ. German Rivera The address in the storage device where the firmware is located. The 4901b940ca64SJ. German Rivera meaning of this address depends on which CONFIG_SYS_LS_MC_FW_IN_xxx macro 4902b940ca64SJ. German Rivera is also specified. 4903b940ca64SJ. German Rivera 4904b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_LENGTH 4905b940ca64SJ. German Rivera The maximum possible size of the firmware. The firmware binary format 4906b940ca64SJ. German Rivera has a field that specifies the actual size of the firmware, but it 4907b940ca64SJ. German Rivera might not be possible to read any part of the firmware unless some 4908b940ca64SJ. German Rivera local storage is allocated to hold the entire firmware first. 4909b940ca64SJ. German Rivera 4910b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_IN_NOR 4911b940ca64SJ. German Rivera Specifies that MC firmware is located in NOR flash, mapped as 4912b940ca64SJ. German Rivera normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the 4913b940ca64SJ. German Rivera virtual address in NOR flash. 4914b940ca64SJ. German Rivera 4915c609719bSwdenkBuilding the Software: 4916c609719bSwdenk====================== 4917c609719bSwdenk 4918218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4919218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4920218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4921218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4922218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4923218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4924c609719bSwdenk 4925218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4926218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4927218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4928218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4929218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4930c609719bSwdenk 4931218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4932218ca724SWolfgang Denk $ export CROSS_COMPILE 4933c609719bSwdenk 49342f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 49352f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 49362f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 49372f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 49382f8d396bSPeter Tyser 49392f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 49402f8d396bSPeter Tyser 49412f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 49422f8d396bSPeter Tyser be executed on computers running Windows. 49432f8d396bSPeter Tyser 4944c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4945c609719bSwdenksources you must configure U-Boot for one specific board type. This 4946c609719bSwdenkis done by typing: 4947c609719bSwdenk 4948ab584d67SHolger Freyther make NAME_defconfig 4949c609719bSwdenk 4950ab584d67SHolger Freytherwhere "NAME_defconfig" is the name of one of the existing configu- 49514d675ae6SMichael Jonesrations; see boards.cfg for supported names. 495254387ac9Swdenk 4953c609719bSwdenkNote: for some board special configuration names may exist; check if 4954c609719bSwdenk additional information is available from the board vendor; for 49552729af9dSwdenk instance, the TQM823L systems are available without (standard) 49562729af9dSwdenk or with LCD support. You can select such additional "features" 495711ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4958c609719bSwdenk 4959ab584d67SHolger Freyther make TQM823L_defconfig 49602729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4961c609719bSwdenk 4962ab584d67SHolger Freyther make TQM823L_LCD_defconfig 4963c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4964c609719bSwdenk 4965c609719bSwdenk etc. 4966c609719bSwdenk 4967c609719bSwdenk 4968c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 49697152b1d0Swdenkimages ready for download to / installation on your system: 4970c609719bSwdenk 4971c609719bSwdenk- "u-boot.bin" is a raw binary image 4972c609719bSwdenk- "u-boot" is an image in ELF binary format 4973c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4974c609719bSwdenk 4975baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4976baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4977baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4978baf31249SMarian Balakowicz 4979baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4980baf31249SMarian Balakowicz 4981baf31249SMarian Balakowicz make O=/tmp/build distclean 4982ab584d67SHolger Freyther make O=/tmp/build NAME_defconfig 4983baf31249SMarian Balakowicz make O=/tmp/build all 4984baf31249SMarian Balakowicz 4985baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4986baf31249SMarian Balakowicz 4987baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4988baf31249SMarian Balakowicz make distclean 4989ab584d67SHolger Freyther make NAME_defconfig 4990baf31249SMarian Balakowicz make all 4991baf31249SMarian Balakowicz 4992baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4993baf31249SMarian Balakowiczvariable. 4994baf31249SMarian Balakowicz 4995c609719bSwdenk 4996c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4997c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4998c609719bSwdenknative "make". 4999c609719bSwdenk 5000c609719bSwdenk 5001c609719bSwdenkIf the system board that you have is not listed, then you will need 5002c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 5003c609719bSwdenksteps: 5004c609719bSwdenk 5005c609719bSwdenk1. Add a new configuration option for your board to the toplevel 50064d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 50074d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 5008c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 500985ec0bccSwdenk files you need. In your board directory, you will need at least 501085ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 501185ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 501285ec0bccSwdenk your board 5013c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 5014c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 5015ab584d67SHolger Freyther4. Run "make <board>_defconfig" with your new name. 5016c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 5017c609719bSwdenk to be installed on your target system. 501885ec0bccSwdenk6. Debug and solve any problems that might arise. 5019c609719bSwdenk [Of course, this last step is much harder than it sounds.] 5020c609719bSwdenk 5021c609719bSwdenk 5022c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 5023c609719bSwdenk============================================================== 5024c609719bSwdenk 5025c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 5026c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 5027c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 5028c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 5029218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 5030c609719bSwdenk 5031c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 5032c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 5033c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 5034c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 5035c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 50367152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 5037218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 5038218ca724SWolfgang Denkyou can type 5039c609719bSwdenk 5040c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 5041c609719bSwdenk 5042c609719bSwdenkor to build on a native PowerPC system you can type 5043c609719bSwdenk 5044c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 5045c609719bSwdenk 5046218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 5047218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 5048218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 5049218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 5050218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 5051218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 5052218ca724SWolfgang Denkvariable. For example: 5053baf31249SMarian Balakowicz 5054baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 5055baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 5056baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 5057baf31249SMarian Balakowicz 5058218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 5059218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 5060218ca724SWolfgang Denkduring the whole build process. 5061baf31249SMarian Balakowicz 5062baf31249SMarian Balakowicz 5063c609719bSwdenkSee also "U-Boot Porting Guide" below. 5064c609719bSwdenk 5065c609719bSwdenk 5066c609719bSwdenkMonitor Commands - Overview: 5067c609719bSwdenk============================ 5068c609719bSwdenk 5069c609719bSwdenkgo - start application at address 'addr' 5070c609719bSwdenkrun - run commands in an environment variable 5071c609719bSwdenkbootm - boot application image from memory 5072c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 507344f074c7SMarek Vasutbootz - boot zImage from memory 5074c609719bSwdenktftpboot- boot image via network using TFTP protocol 5075c609719bSwdenk and env variables "ipaddr" and "serverip" 5076c609719bSwdenk (and eventually "gatewayip") 50771fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 5078c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 5079c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 5080c609719bSwdenkloads - load S-Record file over serial line 5081c609719bSwdenkloadb - load binary file over serial line (kermit mode) 5082c609719bSwdenkmd - memory display 5083c609719bSwdenkmm - memory modify (auto-incrementing) 5084c609719bSwdenknm - memory modify (constant address) 5085c609719bSwdenkmw - memory write (fill) 5086c609719bSwdenkcp - memory copy 5087c609719bSwdenkcmp - memory compare 5088c609719bSwdenkcrc32 - checksum calculation 50890f89c54bSPeter Tyseri2c - I2C sub-system 5090c609719bSwdenksspi - SPI utility commands 5091c609719bSwdenkbase - print or set address offset 5092c609719bSwdenkprintenv- print environment variables 5093c609719bSwdenksetenv - set environment variables 5094c609719bSwdenksaveenv - save environment variables to persistent storage 5095c609719bSwdenkprotect - enable or disable FLASH write protection 5096c609719bSwdenkerase - erase FLASH memory 5097c609719bSwdenkflinfo - print FLASH memory information 509810635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 5099c609719bSwdenkbdinfo - print Board Info structure 5100c609719bSwdenkiminfo - print header information for application image 5101c609719bSwdenkconinfo - print console devices and informations 5102c609719bSwdenkide - IDE sub-system 5103c609719bSwdenkloop - infinite loop on address range 510456523f12Swdenkloopw - infinite write loop on address range 5105c609719bSwdenkmtest - simple RAM test 5106c609719bSwdenkicache - enable or disable instruction cache 5107c609719bSwdenkdcache - enable or disable data cache 5108c609719bSwdenkreset - Perform RESET of the CPU 5109c609719bSwdenkecho - echo args to console 5110c609719bSwdenkversion - print monitor version 5111c609719bSwdenkhelp - print online help 5112c609719bSwdenk? - alias for 'help' 5113c609719bSwdenk 5114c609719bSwdenk 5115c609719bSwdenkMonitor Commands - Detailed Description: 5116c609719bSwdenk======================================== 5117c609719bSwdenk 5118c609719bSwdenkTODO. 5119c609719bSwdenk 5120c609719bSwdenkFor now: just type "help <command>". 5121c609719bSwdenk 5122c609719bSwdenk 5123c609719bSwdenkEnvironment Variables: 5124c609719bSwdenk====================== 5125c609719bSwdenk 5126c609719bSwdenkU-Boot supports user configuration using Environment Variables which 5127c609719bSwdenkcan be made persistent by saving to Flash memory. 5128c609719bSwdenk 5129c609719bSwdenkEnvironment Variables are set using "setenv", printed using 5130c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 5131c609719bSwdenkwithout a value can be used to delete a variable from the 5132c609719bSwdenkenvironment. As long as you don't save the environment you are 5133c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 5134c609719bSwdenkenvironment is erased by accident, a default environment is provided. 5135c609719bSwdenk 5136c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 5137c96f86eeSWolfgang Denk 5138c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 5139c609719bSwdenk 5140c609719bSwdenk baudrate - see CONFIG_BAUDRATE 5141c609719bSwdenk 5142c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 5143c609719bSwdenk 5144c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 5145c609719bSwdenk 5146c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 5147c609719bSwdenk 5148c609719bSwdenk bootfile - Name of the image to load with TFTP 5149c609719bSwdenk 51507d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 51517d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51527d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 51537d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 51547d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 51557d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 5156c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 5157c3624e6eSGrant Likely bootm_mapsize. 5158c3624e6eSGrant Likely 5159c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 5160c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 5161c3624e6eSGrant Likely defines the size of the memory region starting at base 5162c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 5163c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 5164c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 5165c3624e6eSGrant Likely used otherwise. 51667d721e34SBartlomiej Sieka 51677d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 51687d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51697d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 51707d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 51717d721e34SBartlomiej Sieka environment variable. 51727d721e34SBartlomiej Sieka 51734bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 51744bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 51754bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 51764bae9090SBartlomiej Sieka 5177c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 5178c609719bSwdenk "bootp" will just load perform a lookup of the 5179c609719bSwdenk configuration from the BOOTP server, but not try to 5180c609719bSwdenk load any image using TFTP 5181c609719bSwdenk 5182c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 5183c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 5184c609719bSwdenk be automatically started (by internally calling 5185c609719bSwdenk "bootm") 5186c609719bSwdenk 51874a6fd34bSwdenk If set to "no", a standalone image passed to the 51884a6fd34bSwdenk "bootm" command will be copied to the load address 51894a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 51904a6fd34bSwdenk This can be used to load and uncompress arbitrary 51914a6fd34bSwdenk data. 51924a6fd34bSwdenk 5193a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 5194a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 5195fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 5196fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 5197fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 5198fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 5199fa34f6b2SShawn Guo device tree blob be copied to the maximum address 5200fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 5201fa34f6b2SShawn Guo access it during the boot procedure. 5202fa34f6b2SShawn Guo 5203a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 5204a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 5205a28afca5SDavid A. Long to work it must reside in writable memory, have 5206a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 5207a28afca5SDavid A. Long add the information it needs into it, and the memory 5208a28afca5SDavid A. Long must be accessible by the kernel. 5209a28afca5SDavid A. Long 5210eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 5211eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 5212eea63e05SSimon Glass defined. 5213eea63e05SSimon Glass 521417ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 521517ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 521617ea1177Swdenk mode (400kHZ). This environment variable is used in 521717ea1177Swdenk initialization code. So, for changes to be effective 521817ea1177Swdenk it must be saved and board must be reset. 521917ea1177Swdenk 5220c609719bSwdenk initrd_high - restrict positioning of initrd images: 5221c609719bSwdenk If this variable is not set, initrd images will be 5222c609719bSwdenk copied to the highest possible address in RAM; this 5223c609719bSwdenk is usually what you want since it allows for 5224c609719bSwdenk maximum initrd size. If for some reason you want to 5225c609719bSwdenk make sure that the initrd image is loaded below the 52266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 5227c609719bSwdenk variable to a value of "no" or "off" or "0". 5228c609719bSwdenk Alternatively, you can set it to a maximum upper 5229c609719bSwdenk address to use (U-Boot will still check that it 5230c609719bSwdenk does not overwrite the U-Boot stack and data). 5231c609719bSwdenk 5232c609719bSwdenk For instance, when you have a system with 16 MB 52337152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 5234c609719bSwdenk you can do this by adding "mem=12M" to the value of 5235c609719bSwdenk the "bootargs" variable. However, now you must make 52367152b1d0Swdenk sure that the initrd image is placed in the first 5237c609719bSwdenk 12 MB as well - this can be done with 5238c609719bSwdenk 5239c609719bSwdenk setenv initrd_high 00c00000 5240c609719bSwdenk 524138b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 524238b99261Swdenk indication to U-Boot that all addresses are legal 524338b99261Swdenk for the Linux kernel, including addresses in flash 524438b99261Swdenk memory. In this case U-Boot will NOT COPY the 524538b99261Swdenk ramdisk at all. This may be useful to reduce the 524638b99261Swdenk boot time on your system, but requires that this 524738b99261Swdenk feature is supported by your Linux kernel. 524838b99261Swdenk 5249c609719bSwdenk ipaddr - IP address; needed for tftpboot command 5250c609719bSwdenk 5251c609719bSwdenk loadaddr - Default load address for commands like "bootp", 5252dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 5253c609719bSwdenk 5254c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 5255c609719bSwdenk 5256c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 5257c609719bSwdenk 5258c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 5259c609719bSwdenk 5260c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 5261c609719bSwdenk 5262c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 5263c609719bSwdenk 5264e2a53458SMike Frysinger ethprime - controls which interface is used first. 5265a3d991bdSwdenk 5266e2a53458SMike Frysinger ethact - controls which interface is currently active. 5267e2a53458SMike Frysinger For example you can do the following 5268a3d991bdSwdenk 526948690d80SHeiko Schocher => setenv ethact FEC 527048690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 527148690d80SHeiko Schocher => setenv ethact SCC 527248690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 5273a3d991bdSwdenk 5274e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 5275e1692577SMatthias Fuchs available network interfaces. 5276e1692577SMatthias Fuchs It just stays at the currently selected interface. 5277e1692577SMatthias Fuchs 5278a3d991bdSwdenk netretry - When set to "no" each network operation will 5279a3d991bdSwdenk either succeed or fail without retrying. 52806e592385Swdenk When set to "once" the network operation will 52816e592385Swdenk fail when all the available network interfaces 52826e592385Swdenk are tried once without success. 5283a3d991bdSwdenk Useful on scripts which control the retry operation 5284a3d991bdSwdenk themselves. 5285a3d991bdSwdenk 5286b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 5287a1cf027aSJean-Christophe PLAGNIOL-VILLARD 52888d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 52898d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 52908d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 52918d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 52928d51aacdSSimon Glass is silent. 52938d51aacdSSimon Glass 529428cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 5295ecb0ccd9SWolfgang Denk UDP source port. 5296ecb0ccd9SWolfgang Denk 529728cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 529828cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 529928cb9375SWolfgang Denk 5300c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 5301c96f86eeSWolfgang Denk we use the TFTP server's default block size 5302c96f86eeSWolfgang Denk 5303c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 5304c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 5305c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 5306c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 5307c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 5308c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 5309c96f86eeSWolfgang Denk with unreliable TFTP servers. 5310c96f86eeSWolfgang Denk 5311a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 531211ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 5313a3d991bdSwdenk VLAN tagged frames. 5314c609719bSwdenk 5315dc0b7b0eSJason HobbsThe following image location variables contain the location of images 5316dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 5317dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 5318dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 5319dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 5320dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 5321dc0b7b0eSJason Hobbsflash or offset in NAND flash. 5322dc0b7b0eSJason Hobbs 5323dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 5324dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 5325dc0b7b0eSJason Hobbsboards use these variables for other purposes. 5326dc0b7b0eSJason Hobbs 5327dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 5328dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5329dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5330dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5331dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5332dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5333dc0b7b0eSJason Hobbs 5334c609719bSwdenkThe following environment variables may be used and automatically 5335c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5336c609719bSwdenkdepending the information provided by your boot server: 5337c609719bSwdenk 5338c609719bSwdenk bootfile - see above 5339c609719bSwdenk dnsip - IP address of your Domain Name Server 5340fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5341c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5342c609719bSwdenk hostname - Target hostname 5343c609719bSwdenk ipaddr - see above 5344c609719bSwdenk netmask - Subnet Mask 5345c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5346c609719bSwdenk serverip - see above 5347c609719bSwdenk 5348c609719bSwdenk 5349c609719bSwdenkThere are two special Environment Variables: 5350c609719bSwdenk 5351c609719bSwdenk serial# - contains hardware identification information such 5352c609719bSwdenk as type string and/or serial number 5353c609719bSwdenk ethaddr - Ethernet address 5354c609719bSwdenk 5355c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5356c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5357c609719bSwdenkonce they have been set once. 5358c609719bSwdenk 5359c609719bSwdenk 5360c1551ea8SstroeseFurther special Environment Variables: 5361c1551ea8Sstroese 5362c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5363c1551ea8Sstroese with the "version" command. This variable is 5364c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5365c1551ea8Sstroese 5366c1551ea8Sstroese 5367c609719bSwdenkPlease note that changes to some configuration parameters may take 5368c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5369c609719bSwdenk 5370c609719bSwdenk 5371170ab110SJoe HershbergerCallback functions for environment variables: 5372170ab110SJoe Hershberger--------------------------------------------- 5373170ab110SJoe Hershberger 5374170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5375170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5376170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5377170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5378170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5379170ab110SJoe Hershberger 5380170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5381170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5382170ab110SJoe Hershberger 5383170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5384170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5385170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5386170ab110SJoe Hershbergerassociations. The list must be in the following format: 5387170ab110SJoe Hershberger 5388170ab110SJoe Hershberger entry = variable_name[:callback_name] 5389170ab110SJoe Hershberger list = entry[,list] 5390170ab110SJoe Hershberger 5391170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5392170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5393170ab110SJoe Hershberger 5394170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5395170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5396170ab110SJoe Hershbergeroverride any association in the static list. You can define 5397170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5398170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5399170ab110SJoe Hershberger 5400170ab110SJoe Hershberger 5401f07771ccSwdenkCommand Line Parsing: 5402f07771ccSwdenk===================== 5403f07771ccSwdenk 5404f07771ccSwdenkThere are two different command line parsers available with U-Boot: 54057152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5406f07771ccSwdenk 5407f07771ccSwdenkOld, simple command line parser: 5408f07771ccSwdenk-------------------------------- 5409f07771ccSwdenk 5410f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5411f07771ccSwdenk- several commands on one line, separated by ';' 5412fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5413f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5414f07771ccSwdenk for example: 5415fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5416f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5417f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5418f07771ccSwdenk 5419f07771ccSwdenkHush shell: 5420f07771ccSwdenk----------- 5421f07771ccSwdenk 5422f07771ccSwdenk- similar to Bourne shell, with control structures like 5423f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5424f07771ccSwdenk until...do...done, ... 5425f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5426f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5427f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5428f07771ccSwdenk command 5429f07771ccSwdenk 5430f07771ccSwdenkGeneral rules: 5431f07771ccSwdenk-------------- 5432f07771ccSwdenk 5433f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5434f07771ccSwdenk command) contains several commands separated by semicolon, and 5435f07771ccSwdenk one of these commands fails, then the remaining commands will be 5436f07771ccSwdenk executed anyway. 5437f07771ccSwdenk 5438f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 543911ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5440f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5441f07771ccSwdenk variables are not executed. 5442f07771ccSwdenk 5443c609719bSwdenkNote for Redundant Ethernet Interfaces: 5444c609719bSwdenk======================================= 5445c609719bSwdenk 544611ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5447c609719bSwdenksuch configurations and is capable of automatic selection of a 54487152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5449c609719bSwdenk 5450c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5451c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5452c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5453c609719bSwdenk 5454c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5455c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5456c609719bSwdenkding setting in the environment; if the corresponding environment 5457c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5458c609719bSwdenk 5459c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5460c609719bSwdenk environment, the SROM's address is used. 5461c609719bSwdenk 5462c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5463c609719bSwdenk environment exists, then the value from the environment variable is 5464c609719bSwdenk used. 5465c609719bSwdenk 5466c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5467c609719bSwdenk both addresses are the same, this MAC address is used. 5468c609719bSwdenk 5469c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5470c609719bSwdenk addresses differ, the value from the environment is used and a 5471c609719bSwdenk warning is printed. 5472c609719bSwdenk 5473c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5474c609719bSwdenk is raised. 5475c609719bSwdenk 5476ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5477ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5478ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5479ecee9324SBen WarrenThe naming convention is as follows: 5480ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5481c609719bSwdenk 5482c609719bSwdenkImage Formats: 5483c609719bSwdenk============== 5484c609719bSwdenk 54853310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 54863310c549SMarian Balakowiczimages in two formats: 54873310c549SMarian Balakowicz 54883310c549SMarian BalakowiczNew uImage format (FIT) 54893310c549SMarian Balakowicz----------------------- 54903310c549SMarian Balakowicz 54913310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 54923310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 54933310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 54943310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 54953310c549SMarian Balakowicz 54963310c549SMarian Balakowicz 54973310c549SMarian BalakowiczOld uImage format 54983310c549SMarian Balakowicz----------------- 54993310c549SMarian Balakowicz 55003310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 55013310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 55023310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5503c609719bSwdenk 5504c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5505c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5506f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5507f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5508f5ed9e39SPeter Tyser INTEGRITY). 55097b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5510afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5511afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5512c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5513c609719bSwdenk* Load Address 5514c609719bSwdenk* Entry Point 5515c609719bSwdenk* Image Name 5516c609719bSwdenk* Image Timestamp 5517c609719bSwdenk 5518c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5519c609719bSwdenkand the data portions of the image are secured against corruption by 5520c609719bSwdenkCRC32 checksums. 5521c609719bSwdenk 5522c609719bSwdenk 5523c609719bSwdenkLinux Support: 5524c609719bSwdenk============== 5525c609719bSwdenk 5526c609719bSwdenkAlthough U-Boot should support any OS or standalone application 55277152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5528c609719bSwdenkU-Boot. 5529c609719bSwdenk 5530c609719bSwdenkU-Boot includes many features that so far have been part of some 5531c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5532c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5533c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 55347152b1d0Swdenkserves several purposes: 5535c609719bSwdenk 5536c609719bSwdenk- the same features can be used for other OS or standalone 5537c609719bSwdenk applications (for instance: using compressed images to reduce the 5538c609719bSwdenk Flash memory footprint) 5539c609719bSwdenk 5540c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 55417152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5542c609719bSwdenk 5543c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5544c609719bSwdenk images; of course this also means that different kernel images can 5545c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5546c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5547c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5548c609719bSwdenk software is easier now. 5549c609719bSwdenk 5550c609719bSwdenk 5551c609719bSwdenkLinux HOWTO: 5552c609719bSwdenk============ 5553c609719bSwdenk 5554c609719bSwdenkPorting Linux to U-Boot based systems: 5555c609719bSwdenk--------------------------------------- 5556c609719bSwdenk 5557c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5558c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5559c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5560c609719bSwdenkLinux :-). 5561c609719bSwdenk 5562a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5563c609719bSwdenk 5564c609719bSwdenkJust make sure your machine specific header file (for instance 5565c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 55661dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 55671dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 55686d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5569c609719bSwdenk 55702eb31b13SSimon GlassNote that U-Boot now has a driver model, a unified model for drivers. 55712eb31b13SSimon GlassIf you are adding a new driver, plumb it into driver model. If there 55722eb31b13SSimon Glassis no uclass available, you are encouraged to create one. See 55732eb31b13SSimon Glassdoc/driver-model. 55742eb31b13SSimon Glass 5575c609719bSwdenk 5576c609719bSwdenkConfiguring the Linux kernel: 5577c609719bSwdenk----------------------------- 5578c609719bSwdenk 5579c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5580c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5581c609719bSwdenk 5582c609719bSwdenk 5583c609719bSwdenkBuilding a Linux Image: 5584c609719bSwdenk----------------------- 5585c609719bSwdenk 558624ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 558724ee89b9Swdenknot used. If you use recent kernel source, a new build target 558824ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 558924ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 559024ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 559124ee89b9Swdenk100% compatible format. 5592c609719bSwdenk 5593c609719bSwdenkExample: 5594c609719bSwdenk 5595ab584d67SHolger Freyther make TQM850L_defconfig 5596c609719bSwdenk make oldconfig 5597c609719bSwdenk make dep 559824ee89b9Swdenk make uImage 5599c609719bSwdenk 560024ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 560124ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 560224ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5603c609719bSwdenk 560424ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 560524ee89b9Swdenk 560624ee89b9Swdenk* convert the kernel into a raw binary image: 560724ee89b9Swdenk 560824ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 560924ee89b9Swdenk -R .note -R .comment \ 561024ee89b9Swdenk -S vmlinux linux.bin 561124ee89b9Swdenk 561224ee89b9Swdenk* compress the binary image: 561324ee89b9Swdenk 561424ee89b9Swdenk gzip -9 linux.bin 561524ee89b9Swdenk 561624ee89b9Swdenk* package compressed binary image for U-Boot: 561724ee89b9Swdenk 561824ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 561924ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 562024ee89b9Swdenk -d linux.bin.gz uImage 562124ee89b9Swdenk 562224ee89b9Swdenk 562324ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 562424ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 562524ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 562624ee89b9Swdenkbyte header containing information about target architecture, 562724ee89b9Swdenkoperating system, image type, compression method, entry points, time 562824ee89b9Swdenkstamp, CRC32 checksums, etc. 562924ee89b9Swdenk 563024ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 563124ee89b9Swdenkprint the header information, or to build new images. 5632c609719bSwdenk 5633c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5634c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5635c609719bSwdenkchecksum verification: 5636c609719bSwdenk 5637c609719bSwdenk tools/mkimage -l image 5638c609719bSwdenk -l ==> list image header information 5639c609719bSwdenk 5640c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5641c609719bSwdenkfrom a "data file" which is used as image payload: 5642c609719bSwdenk 5643c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5644c609719bSwdenk -n name -d data_file image 5645c609719bSwdenk -A ==> set architecture to 'arch' 5646c609719bSwdenk -O ==> set operating system to 'os' 5647c609719bSwdenk -T ==> set image type to 'type' 5648c609719bSwdenk -C ==> set compression type 'comp' 5649c609719bSwdenk -a ==> set load address to 'addr' (hex) 5650c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5651c609719bSwdenk -n ==> set image name to 'name' 5652c609719bSwdenk -d ==> use image data from 'datafile' 5653c609719bSwdenk 565469459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 565569459791Swdenkaddress (0x00000000), but the entry point address depends on the 565669459791Swdenkkernel version: 5657c609719bSwdenk 5658c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 565924ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5660c609719bSwdenk 5661c609719bSwdenkSo a typical call to build a U-Boot image would read: 5662c609719bSwdenk 566324ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 566424ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5665a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 566624ee89b9Swdenk > examples/uImage.TQM850L 566724ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5668c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5669c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5670c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5671c609719bSwdenk Load Address: 0x00000000 567224ee89b9Swdenk Entry Point: 0x00000000 5673c609719bSwdenk 5674c609719bSwdenkTo verify the contents of the image (or check for corruption): 5675c609719bSwdenk 567624ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 567724ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5678c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5679c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5680c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5681c609719bSwdenk Load Address: 0x00000000 568224ee89b9Swdenk Entry Point: 0x00000000 5683c609719bSwdenk 5684c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5685c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5686c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5687c609719bSwdenkneed to be uncompressed: 5688c609719bSwdenk 5689a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 569024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 569124ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5692a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 569324ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 569424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5695c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5696c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5697c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5698c609719bSwdenk Load Address: 0x00000000 569924ee89b9Swdenk Entry Point: 0x00000000 5700c609719bSwdenk 5701c609719bSwdenk 5702c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5703c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5704c609719bSwdenk 5705c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5706c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5707c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5708c609719bSwdenk Image Name: Simple Ramdisk Image 5709c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5710c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5711c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5712c609719bSwdenk Load Address: 0x00000000 5713c609719bSwdenk Entry Point: 0x00000000 5714c609719bSwdenk 5715a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5716a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5717a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5718a804b5ceSGuilherme Maciel Ferreirafrom the image: 5719a804b5ceSGuilherme Maciel Ferreira 5720a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5721a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5722a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5723a804b5ceSGuilherme Maciel Ferreira 5724c609719bSwdenk 5725c609719bSwdenkInstalling a Linux Image: 5726c609719bSwdenk------------------------- 5727c609719bSwdenk 5728c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5729c609719bSwdenkyou must convert the image to S-Record format: 5730c609719bSwdenk 5731c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5732c609719bSwdenk 5733c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5734c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5735c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5736c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5737c609719bSwdenkcommand. 5738c609719bSwdenk 5739c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5740c609719bSwdenkTQM8xxL is in the first Flash bank): 5741c609719bSwdenk 5742c609719bSwdenk => erase 40100000 401FFFFF 5743c609719bSwdenk 5744c609719bSwdenk .......... done 5745c609719bSwdenk Erased 8 sectors 5746c609719bSwdenk 5747c609719bSwdenk => loads 40100000 5748c609719bSwdenk ## Ready for S-Record download ... 5749c609719bSwdenk ~>examples/image.srec 5750c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5751c609719bSwdenk ... 5752c609719bSwdenk 15989 15990 15991 15992 5753c609719bSwdenk [file transfer complete] 5754c609719bSwdenk [connected] 5755c609719bSwdenk ## Start Addr = 0x00000000 5756c609719bSwdenk 5757c609719bSwdenk 5758c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5759c609719bSwdenkthis includes a checksum verification so you can be sure no data 5760c609719bSwdenkcorruption happened: 5761c609719bSwdenk 5762c609719bSwdenk => imi 40100000 5763c609719bSwdenk 5764c609719bSwdenk ## Checking Image at 40100000 ... 5765c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5766c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5767c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5768c609719bSwdenk Load Address: 00000000 5769c609719bSwdenk Entry Point: 0000000c 5770c609719bSwdenk Verifying Checksum ... OK 5771c609719bSwdenk 5772c609719bSwdenk 5773c609719bSwdenkBoot Linux: 5774c609719bSwdenk----------- 5775c609719bSwdenk 5776c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5777c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5778c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5779c609719bSwdenkparameters. You can check and modify this variable using the 5780c609719bSwdenk"printenv" and "setenv" commands: 5781c609719bSwdenk 5782c609719bSwdenk 5783c609719bSwdenk => printenv bootargs 5784c609719bSwdenk bootargs=root=/dev/ram 5785c609719bSwdenk 5786c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5787c609719bSwdenk 5788c609719bSwdenk => printenv bootargs 5789c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5790c609719bSwdenk 5791c609719bSwdenk => bootm 40020000 5792c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5793c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5794c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5795c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5796c609719bSwdenk Load Address: 00000000 5797c609719bSwdenk Entry Point: 0000000c 5798c609719bSwdenk Verifying Checksum ... OK 5799c609719bSwdenk Uncompressing Kernel Image ... OK 5800c609719bSwdenk 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 5801c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5802c609719bSwdenk time_init: decrementer frequency = 187500000/60 5803c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5804c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5805c609719bSwdenk ... 5806c609719bSwdenk 580711ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 58087152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5809c609719bSwdenkformat!) to the "bootm" command: 5810c609719bSwdenk 5811c609719bSwdenk => imi 40100000 40200000 5812c609719bSwdenk 5813c609719bSwdenk ## Checking Image at 40100000 ... 5814c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5815c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5816c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5817c609719bSwdenk Load Address: 00000000 5818c609719bSwdenk Entry Point: 0000000c 5819c609719bSwdenk Verifying Checksum ... OK 5820c609719bSwdenk 5821c609719bSwdenk ## Checking Image at 40200000 ... 5822c609719bSwdenk Image Name: Simple Ramdisk Image 5823c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5824c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5825c609719bSwdenk Load Address: 00000000 5826c609719bSwdenk Entry Point: 00000000 5827c609719bSwdenk Verifying Checksum ... OK 5828c609719bSwdenk 5829c609719bSwdenk => bootm 40100000 40200000 5830c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5831c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5832c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5833c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5834c609719bSwdenk Load Address: 00000000 5835c609719bSwdenk Entry Point: 0000000c 5836c609719bSwdenk Verifying Checksum ... OK 5837c609719bSwdenk Uncompressing Kernel Image ... OK 5838c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5839c609719bSwdenk Image Name: Simple Ramdisk Image 5840c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5841c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5842c609719bSwdenk Load Address: 00000000 5843c609719bSwdenk Entry Point: 00000000 5844c609719bSwdenk Verifying Checksum ... OK 5845c609719bSwdenk Loading Ramdisk ... OK 5846c609719bSwdenk 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 5847c609719bSwdenk Boot arguments: root=/dev/ram 5848c609719bSwdenk time_init: decrementer frequency = 187500000/60 5849c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5850c609719bSwdenk ... 5851c609719bSwdenk RAMDISK: Compressed image found at block 0 5852c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5853c609719bSwdenk 5854c609719bSwdenk bash# 5855c609719bSwdenk 58560267768eSMatthew McClintockBoot Linux and pass a flat device tree: 58570267768eSMatthew McClintock----------- 58580267768eSMatthew McClintock 58590267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 58600267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 58610267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 58620267768eSMatthew McClintockflat device tree: 58630267768eSMatthew McClintock 58640267768eSMatthew McClintock=> print oftaddr 58650267768eSMatthew McClintockoftaddr=0x300000 58660267768eSMatthew McClintock=> print oft 58670267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 58680267768eSMatthew McClintock=> tftp $oftaddr $oft 58690267768eSMatthew McClintockSpeed: 1000, full duplex 58700267768eSMatthew McClintockUsing TSEC0 device 58710267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 58720267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 58730267768eSMatthew McClintockLoad address: 0x300000 58740267768eSMatthew McClintockLoading: # 58750267768eSMatthew McClintockdone 58760267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 58770267768eSMatthew McClintock=> tftp $loadaddr $bootfile 58780267768eSMatthew McClintockSpeed: 1000, full duplex 58790267768eSMatthew McClintockUsing TSEC0 device 58800267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 58810267768eSMatthew McClintockFilename 'uImage'. 58820267768eSMatthew McClintockLoad address: 0x200000 58830267768eSMatthew McClintockLoading:############ 58840267768eSMatthew McClintockdone 58850267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 58860267768eSMatthew McClintock=> print loadaddr 58870267768eSMatthew McClintockloadaddr=200000 58880267768eSMatthew McClintock=> print oftaddr 58890267768eSMatthew McClintockoftaddr=0x300000 58900267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 58910267768eSMatthew McClintock## Booting image at 00200000 ... 58920267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 58930267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 58940267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 58950267768eSMatthew McClintock Load Address: 00000000 58960267768eSMatthew McClintock Entry Point: 00000000 58970267768eSMatthew McClintock Verifying Checksum ... OK 58980267768eSMatthew McClintock Uncompressing Kernel Image ... OK 58990267768eSMatthew McClintockBooting using flat device tree at 0x300000 59000267768eSMatthew McClintockUsing MPC85xx ADS machine description 59010267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 59020267768eSMatthew McClintock[snip] 59030267768eSMatthew McClintock 59040267768eSMatthew McClintock 59056069ff26SwdenkMore About U-Boot Image Types: 59066069ff26Swdenk------------------------------ 59076069ff26Swdenk 59086069ff26SwdenkU-Boot supports the following image types: 59096069ff26Swdenk 59106069ff26Swdenk "Standalone Programs" are directly runnable in the environment 59116069ff26Swdenk provided by U-Boot; it is expected that (if they behave 59126069ff26Swdenk well) you can continue to work in U-Boot after return from 59136069ff26Swdenk the Standalone Program. 59146069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 59156069ff26Swdenk will take over control completely. Usually these programs 59166069ff26Swdenk will install their own set of exception handlers, device 59176069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 59186069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 59196069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 59206069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 59216069ff26Swdenk being started. 59226069ff26Swdenk "Multi-File Images" contain several images, typically an OS 59236069ff26Swdenk (Linux) kernel image and one or more data images like 59246069ff26Swdenk RAMDisks. This construct is useful for instance when you want 59256069ff26Swdenk to boot over the network using BOOTP etc., where the boot 59266069ff26Swdenk server provides just a single image file, but you want to get 59276069ff26Swdenk for instance an OS kernel and a RAMDisk image. 59286069ff26Swdenk 59296069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 59306069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 59316069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 59326069ff26Swdenk Immediately after the terminating 0 follow the images, one by 59336069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 59346069ff26Swdenk a multiple of 4 bytes). 59356069ff26Swdenk 59366069ff26Swdenk "Firmware Images" are binary images containing firmware (like 59376069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 59386069ff26Swdenk flash memory. 59396069ff26Swdenk 59406069ff26Swdenk "Script files" are command sequences that will be executed by 59416069ff26Swdenk U-Boot's command interpreter; this feature is especially 59426069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 59436069ff26Swdenk as command interpreter. 59446069ff26Swdenk 594544f074c7SMarek VasutBooting the Linux zImage: 594644f074c7SMarek Vasut------------------------- 594744f074c7SMarek Vasut 594844f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 594944f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 595044f074c7SMarek Vasutas the syntax of "bootm" command. 595144f074c7SMarek Vasut 59528ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5953017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5954017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5955017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5956017e1f3fSMarek Vasut 5957c609719bSwdenk 5958c609719bSwdenkStandalone HOWTO: 5959c609719bSwdenk================= 5960c609719bSwdenk 5961c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5962c609719bSwdenkrun "standalone" applications, which can use some resources of 5963c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5964c609719bSwdenk 5965c609719bSwdenkTwo simple examples are included with the sources: 5966c609719bSwdenk 5967c609719bSwdenk"Hello World" Demo: 5968c609719bSwdenk------------------- 5969c609719bSwdenk 5970c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5971c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5972c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5973c609719bSwdenklike that: 5974c609719bSwdenk 5975c609719bSwdenk => loads 5976c609719bSwdenk ## Ready for S-Record download ... 5977c609719bSwdenk ~>examples/hello_world.srec 5978c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5979c609719bSwdenk [file transfer complete] 5980c609719bSwdenk [connected] 5981c609719bSwdenk ## Start Addr = 0x00040004 5982c609719bSwdenk 5983c609719bSwdenk => go 40004 Hello World! This is a test. 5984c609719bSwdenk ## Starting application at 0x00040004 ... 5985c609719bSwdenk Hello World 5986c609719bSwdenk argc = 7 5987c609719bSwdenk argv[0] = "40004" 5988c609719bSwdenk argv[1] = "Hello" 5989c609719bSwdenk argv[2] = "World!" 5990c609719bSwdenk argv[3] = "This" 5991c609719bSwdenk argv[4] = "is" 5992c609719bSwdenk argv[5] = "a" 5993c609719bSwdenk argv[6] = "test." 5994c609719bSwdenk argv[7] = "<NULL>" 5995c609719bSwdenk Hit any key to exit ... 5996c609719bSwdenk 5997c609719bSwdenk ## Application terminated, rc = 0x0 5998c609719bSwdenk 5999c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 6000c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 6001c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 6002c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 6003c609719bSwdenkcharacter, but this is just a demo program. The application can be 6004c609719bSwdenkcontrolled by the following keys: 6005c609719bSwdenk 6006c609719bSwdenk ? - print current values og the CPM Timer registers 6007c609719bSwdenk b - enable interrupts and start timer 6008c609719bSwdenk e - stop timer and disable interrupts 6009c609719bSwdenk q - quit application 6010c609719bSwdenk 6011c609719bSwdenk => loads 6012c609719bSwdenk ## Ready for S-Record download ... 6013c609719bSwdenk ~>examples/timer.srec 6014c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 6015c609719bSwdenk [file transfer complete] 6016c609719bSwdenk [connected] 6017c609719bSwdenk ## Start Addr = 0x00040004 6018c609719bSwdenk 6019c609719bSwdenk => go 40004 6020c609719bSwdenk ## Starting application at 0x00040004 ... 6021c609719bSwdenk TIMERS=0xfff00980 6022c609719bSwdenk Using timer 1 6023c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 6024c609719bSwdenk 6025c609719bSwdenkHit 'b': 6026c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 6027c609719bSwdenk Enabling timer 6028c609719bSwdenkHit '?': 6029c609719bSwdenk [q, b, e, ?] ........ 6030c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 6031c609719bSwdenkHit '?': 6032c609719bSwdenk [q, b, e, ?] . 6033c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 6034c609719bSwdenkHit '?': 6035c609719bSwdenk [q, b, e, ?] . 6036c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 6037c609719bSwdenkHit '?': 6038c609719bSwdenk [q, b, e, ?] . 6039c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 6040c609719bSwdenkHit 'e': 6041c609719bSwdenk [q, b, e, ?] ...Stopping timer 6042c609719bSwdenkHit 'q': 6043c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 6044c609719bSwdenk 6045c609719bSwdenk 604685ec0bccSwdenkMinicom warning: 604785ec0bccSwdenk================ 604885ec0bccSwdenk 60497152b1d0SwdenkOver time, many people have reported problems when trying to use the 605085ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 605185ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 6052f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 605385ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 6054e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 6055e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 6056e53515a2SKarl O. Pincfor help with kermit. 6057e53515a2SKarl O. Pinc 605885ec0bccSwdenk 605952f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 606052f52c14Swdenkconfiguration to your "File transfer protocols" section: 606152f52c14Swdenk 606252f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 606352f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 606452f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 606552f52c14Swdenk 606652f52c14Swdenk 6067c609719bSwdenkNetBSD Notes: 6068c609719bSwdenk============= 6069c609719bSwdenk 6070c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 6071c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 6072c609719bSwdenk 6073c609719bSwdenkBuilding requires a cross environment; it is known to work on 6074c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 6075c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 6076c609719bSwdenkNote that the cross-powerpc package does not install include files; 6077c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 6078c609719bSwdenkmissing. This file has to be installed and patched manually: 6079c609719bSwdenk 6080c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 6081c609719bSwdenk # mkdir powerpc 6082c609719bSwdenk # ln -s powerpc machine 6083c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 6084c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 6085c609719bSwdenk 6086c609719bSwdenkNative builds *don't* work due to incompatibilities between native 6087c609719bSwdenkand U-Boot include files. 6088c609719bSwdenk 6089c609719bSwdenkBooting assumes that (the first part of) the image booted is a 6090c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 6091c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 6092c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 60932a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 6094c609719bSwdenk 6095c609719bSwdenk 6096c609719bSwdenkImplementation Internals: 6097c609719bSwdenk========================= 6098c609719bSwdenk 6099c609719bSwdenkThe following is not intended to be a complete description of every 6100c609719bSwdenkimplementation detail. However, it should help to understand the 6101c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 6102c609719bSwdenkhardware. 6103c609719bSwdenk 6104c609719bSwdenk 6105c609719bSwdenkInitial Stack, Global Data: 6106c609719bSwdenk--------------------------- 6107c609719bSwdenk 6108c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 6109c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 6110c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 6111c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 6112c609719bSwdenkis not initialized as zero. To be able to get a C environment working 6113c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 6114c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 6115c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 6116c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 6117c609719bSwdenklocked as (mis-) used as memory, etc. 6118c609719bSwdenk 61197152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 61200668236bSWolfgang Denk U-Boot mailing list: 612143d9616cSwdenk 612243d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 612343d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 612443d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 612543d9616cSwdenk ... 612643d9616cSwdenk 612743d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 612843d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 612943d9616cSwdenk require any physical RAM backing up the cache. The cleverness 613043d9616cSwdenk is that the cache is being used as a temporary supply of 613143d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 613211ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 613343d9616cSwdenk can see how this works by studying the cache architecture and 613443d9616cSwdenk operation in the architecture and processor-specific manuals. 613543d9616cSwdenk 613643d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 613743d9616cSwdenk is another option for the system designer to use as an 613811ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 613943d9616cSwdenk option should work for you. Using CS 4 should be fine if your 614043d9616cSwdenk board designers haven't used it for something that would 614143d9616cSwdenk cause you grief during the initial boot! It is frequently not 614243d9616cSwdenk used. 614343d9616cSwdenk 61446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 614543d9616cSwdenk with your processor/board/system design. The default value 614643d9616cSwdenk you will find in any recent u-boot distribution in 61478a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 614843d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 614943d9616cSwdenk it above 400_0000. Just make sure your board has no resources 615043d9616cSwdenk that are supposed to respond to that address! That code in 615143d9616cSwdenk start.S has been around a while and should work as is when 615243d9616cSwdenk you get the config right. 615343d9616cSwdenk 615443d9616cSwdenk -Chris Hallinan 615543d9616cSwdenk DS4.COM, Inc. 615643d9616cSwdenk 6157c609719bSwdenkIt is essential to remember this, since it has some impact on the C 6158c609719bSwdenkcode for the initialization procedures: 6159c609719bSwdenk 6160c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 6161c609719bSwdenk to write it. 6162c609719bSwdenk 616311ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 6164c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 61657152b1d0Swdenk zation is performed later (when relocating to RAM). 6166c609719bSwdenk 6167c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 6168c609719bSwdenk that. 6169c609719bSwdenk 6170c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 6171c609719bSwdenknormal global data to share information beween the code. But it 6172c609719bSwdenkturned out that the implementation of U-Boot can be greatly 6173c609719bSwdenksimplified by making a global data structure (gd_t) available to all 6174c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 6175c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 6176c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 6177c609719bSwdenkplace a pointer (gd) to the global data into a register which we 6178c609719bSwdenkreserve for this purpose. 6179c609719bSwdenk 61807152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 6181c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 6182c609719bSwdenkGCC's implementation. 6183c609719bSwdenk 6184c609719bSwdenkFor PowerPC, the following registers have specific use: 6185c609719bSwdenk R1: stack pointer 6186e7670f6cSWolfgang Denk R2: reserved for system use 6187c609719bSwdenk R3-R4: parameter passing and return values 6188c609719bSwdenk R5-R10: parameter passing 6189c609719bSwdenk R13: small data area pointer 6190c609719bSwdenk R30: GOT pointer 6191c609719bSwdenk R31: frame pointer 6192c609719bSwdenk 6193e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 6194e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 6195e6bee808SJoakim Tjernlund going back and forth between asm and C) 6196c609719bSwdenk 6197e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 6198c609719bSwdenk 6199c609719bSwdenk Note: on PPC, we could use a static initializer (since the 6200c609719bSwdenk address of the global data structure is known at compile time), 6201c609719bSwdenk but it turned out that reserving a register results in somewhat 6202c609719bSwdenk smaller code - although the code savings are not that big (on 6203c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 6204c609719bSwdenk 624 text + 127 data). 6205c609719bSwdenk 6206c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 62074c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 62084c58eb55SMike Frysinger 6209c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 62104c58eb55SMike Frysinger 6211c609719bSwdenkOn ARM, the following registers are used: 6212c609719bSwdenk 6213c609719bSwdenk R0: function argument word/integer result 6214c609719bSwdenk R1-R3: function argument word 621512eba1b4SJeroen Hofstee R9: platform specific 621612eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 6217c609719bSwdenk R11: argument (frame) pointer 6218c609719bSwdenk R12: temporary workspace 6219c609719bSwdenk R13: stack pointer 6220c609719bSwdenk R14: link register 6221c609719bSwdenk R15: program counter 6222c609719bSwdenk 622312eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 622412eba1b4SJeroen Hofstee 622512eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 6226c609719bSwdenk 62270df01fd3SThomas ChouOn Nios II, the ABI is documented here: 62280df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 62290df01fd3SThomas Chou 62300df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 62310df01fd3SThomas Chou 62320df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 62330df01fd3SThomas Chou to access small data sections, so gp is free. 62340df01fd3SThomas Chou 6235afc1ce82SMacpaul LinOn NDS32, the following registers are used: 6236afc1ce82SMacpaul Lin 6237afc1ce82SMacpaul Lin R0-R1: argument/return 6238afc1ce82SMacpaul Lin R2-R5: argument 6239afc1ce82SMacpaul Lin R15: temporary register for assembler 6240afc1ce82SMacpaul Lin R16: trampoline register 6241afc1ce82SMacpaul Lin R28: frame pointer (FP) 6242afc1ce82SMacpaul Lin R29: global pointer (GP) 6243afc1ce82SMacpaul Lin R30: link register (LP) 6244afc1ce82SMacpaul Lin R31: stack pointer (SP) 6245afc1ce82SMacpaul Lin PC: program counter (PC) 6246afc1ce82SMacpaul Lin 6247afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 6248afc1ce82SMacpaul Lin 6249d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 6250d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 6251c609719bSwdenk 6252c609719bSwdenkMemory Management: 6253c609719bSwdenk------------------ 6254c609719bSwdenk 6255c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 6256c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 6257c609719bSwdenk 6258c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 6259c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 6260c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 6261c609719bSwdenkphysical memory banks. 6262c609719bSwdenk 6263c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 6264c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 6265c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 6266c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 62676d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 6268c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 6269c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 6270c609719bSwdenk 6271c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 6272c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 6273c609719bSwdenk 6274c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 6275c609719bSwdenkthis: 6276c609719bSwdenk 6277c609719bSwdenk 0x0000 0000 Exception Vector code 6278c609719bSwdenk : 6279c609719bSwdenk 0x0000 1FFF 6280c609719bSwdenk 0x0000 2000 Free for Application Use 6281c609719bSwdenk : 6282c609719bSwdenk : 6283c609719bSwdenk 6284c609719bSwdenk : 6285c609719bSwdenk : 6286c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 6287c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 6288c609719bSwdenk 0x00FC 0000 Malloc Arena 6289c609719bSwdenk : 6290c609719bSwdenk 0x00FD FFFF 6291c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 6292c609719bSwdenk ... eventually: LCD or video framebuffer 6293c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 6294c609719bSwdenk 0x00FF FFFF [End of RAM] 6295c609719bSwdenk 6296c609719bSwdenk 6297c609719bSwdenkSystem Initialization: 6298c609719bSwdenk---------------------- 6299c609719bSwdenk 6300c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 630111ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 6302c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 63037152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 6304c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 6305c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 6306c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 6307c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 6308c609719bSwdenkthe caches and the SIU. 6309c609719bSwdenk 6310c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 6311c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 6312c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 6313c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 6314c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 6315c609719bSwdenksimple memory test is run that determines the size of the SDRAM 6316c609719bSwdenkbanks. 6317c609719bSwdenk 6318c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 63197152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 6320c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 6321c609719bSwdenk0x00000000, with any additional banks following immediately to create 6322c609719bSwdenkcontiguous memory starting from 0. 6323c609719bSwdenk 6324c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 6325c609719bSwdenkand allocates memory for use by malloc() and for the global Board 6326c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 6327c609719bSwdenkpages, and the final stack is set up. 6328c609719bSwdenk 6329c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 6330c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 6331c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 6332c609719bSwdenknew address in RAM. 6333c609719bSwdenk 6334c609719bSwdenk 6335c609719bSwdenkU-Boot Porting Guide: 6336c609719bSwdenk---------------------- 6337c609719bSwdenk 6338c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 63396aff3115Swdenklist, October 2002] 6340c609719bSwdenk 6341c609719bSwdenk 6342c609719bSwdenkint main(int argc, char *argv[]) 6343c609719bSwdenk{ 6344c609719bSwdenk sighandler_t no_more_time; 6345c609719bSwdenk 6346c609719bSwdenk signal(SIGALRM, no_more_time); 6347c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6348c609719bSwdenk 6349c609719bSwdenk if (available_money > available_manpower) { 63506c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6351c609719bSwdenk return 0; 6352c609719bSwdenk } 6353c609719bSwdenk 6354c609719bSwdenk Download latest U-Boot source; 6355c609719bSwdenk 63560668236bSWolfgang Denk Subscribe to u-boot mailing list; 63576aff3115Swdenk 63586c3fef28SJerry Van Baren if (clueless) 6359c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6360c609719bSwdenk 6361c609719bSwdenk while (learning) { 6362c609719bSwdenk Read the README file in the top level directory; 63637cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 63646c3fef28SJerry Van Baren Read applicable doc/*.README; 6365c609719bSwdenk Read the source, Luke; 63666c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6367c609719bSwdenk } 6368c609719bSwdenk 63696c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 63706c3fef28SJerry Van Baren Buy a BDI3000; 63716c3fef28SJerry Van Baren else 6372c609719bSwdenk Add a lot of aggravation and time; 6373c609719bSwdenk 63746c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 63756c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 63766c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 63776c3fef28SJerry Van Baren } else { 6378c609719bSwdenk Create your own board support subdirectory; 63796c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 63806c3fef28SJerry Van Baren } 63816c3fef28SJerry Van Baren Edit new board/<myboard> files 63826c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6383c609719bSwdenk 63846c3fef28SJerry Van Baren while (!accepted) { 6385c609719bSwdenk while (!running) { 6386c609719bSwdenk do { 6387c609719bSwdenk Add / modify source code; 6388c609719bSwdenk } until (compiles); 6389c609719bSwdenk Debug; 6390c609719bSwdenk if (clueless) 6391c609719bSwdenk email("Hi, I am having problems..."); 6392c609719bSwdenk } 63936c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 63946c3fef28SJerry Van Baren if (reasonable critiques) 63956c3fef28SJerry Van Baren Incorporate improvements from email list code review; 63966c3fef28SJerry Van Baren else 63976c3fef28SJerry Van Baren Defend code as written; 63986c3fef28SJerry Van Baren } 6399c609719bSwdenk 6400c609719bSwdenk return 0; 6401c609719bSwdenk} 6402c609719bSwdenk 6403c609719bSwdenkvoid no_more_time (int sig) 6404c609719bSwdenk{ 6405c609719bSwdenk hire_a_guru(); 6406c609719bSwdenk} 6407c609719bSwdenk 6408c609719bSwdenk 6409c609719bSwdenkCoding Standards: 6410c609719bSwdenk----------------- 6411c609719bSwdenk 6412c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 64132c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 64147ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6415c609719bSwdenk 64162c051651SDetlev ZundelSource files originating from a different project (for example the 64172c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 64182c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 64192c051651SDetlev Zundelsources. 64202c051651SDetlev Zundel 64212c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 64222c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 64232c051651SDetlev Zundelin your code. 6424c609719bSwdenk 6425c178d3daSwdenkPlease also stick to the following formatting rules: 6426180d3f74Swdenk- remove any trailing white space 64277ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6428180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 64297ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6430180d3f74Swdenk- do not add trailing empty lines to source files 6431180d3f74Swdenk 6432c609719bSwdenkSubmissions which do not conform to the standards may be returned 6433c609719bSwdenkwith a request to reformat the changes. 6434c609719bSwdenk 6435c609719bSwdenk 6436c609719bSwdenkSubmitting Patches: 6437c609719bSwdenk------------------- 6438c609719bSwdenk 6439c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6440c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6441c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6442c609719bSwdenk 64430d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6444218ca724SWolfgang Denk 64450668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 64460668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 64470668236bSWolfgang Denk 6448c609719bSwdenkWhen you send a patch, please include the following information with 6449c609719bSwdenkit: 6450c609719bSwdenk 6451c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6452c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6453c609719bSwdenk patch actually fixes something. 6454c609719bSwdenk 6455c609719bSwdenk* For new features: a description of the feature and your 6456c609719bSwdenk implementation. 6457c609719bSwdenk 6458c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6459c609719bSwdenk 6460c609719bSwdenk* For major contributions, your entry to the CREDITS file 6461c609719bSwdenk 646227af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 646327af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6464c609719bSwdenk 6465c609719bSwdenk* If your patch adds new configuration options, don't forget to 6466c609719bSwdenk document these in the README file. 6467c609719bSwdenk 6468218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6469218ca724SWolfgang Denk recommended) you can easily generate the patch using the 64707ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6471218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6472218ca724SWolfgang Denk with some other mail clients. 6473c609719bSwdenk 6474218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6475218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6476218ca724SWolfgang Denk GNU diff. 64776dff5529Swdenk 6478218ca724SWolfgang Denk The current directory when running this command shall be the parent 6479218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6480218ca724SWolfgang Denk your patch includes sufficient directory information for the 6481218ca724SWolfgang Denk affected files). 6482218ca724SWolfgang Denk 6483218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6484218ca724SWolfgang Denk and compressed attachments must not be used. 6485c609719bSwdenk 648652f52c14Swdenk* If one logical set of modifications affects or creates several 648752f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 648852f52c14Swdenk 648952f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 649052f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 649152f52c14Swdenk 649252f52c14Swdenk 6493c609719bSwdenkNotes: 6494c609719bSwdenk 6495c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6496c609719bSwdenk source tree and make sure that no errors or warnings are reported 6497c609719bSwdenk for any of the boards. 6498c609719bSwdenk 6499c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6500c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6501c609719bSwdenk returned with a request to re-formatting / split it. 6502c609719bSwdenk 6503c609719bSwdenk* If you modify existing code, make sure that your new code does not 6504c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6505c609719bSwdenk When adding new features, these should compile conditionally only 6506c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6507c609719bSwdenk disabled must not need more memory than the old code without your 6508c609719bSwdenk modification. 650990dc6704Swdenk 65100668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 65110668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 65120668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 65130668236bSWolfgang Denk bigger than the size limit should be avoided. 6514