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 255c609719bSwdenkconfigurations available; just type "make <board_name>_config". 256c609719bSwdenk 257c609719bSwdenkExample: For a TQM823L module type: 258c609719bSwdenk 259c609719bSwdenk cd u-boot 260c609719bSwdenk make TQM823L_config 261c609719bSwdenk 26211ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 263c609719bSwdenke.g. "make cogent_mpc8xx_config". 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 3242535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3252535d602Swdenk CONFIG_ADSTYPE 3262535d602Swdenk Possible values are: 3276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3312535d602Swdenk 332cf946c6dSLei Wen- Marvell Family Member 333cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 334cf946c6dSLei Wen multiple fs option at one time 335cf946c6dSLei Wen for marvell soc family 336cf946c6dSLei Wen 337c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 338c609719bSwdenk Define exactly one of 339c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 340c609719bSwdenk 34111ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 34266ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 34366ca92a5Swdenk get_gclk_freq() cannot work 3445da627a4Swdenk e.g. if there is no 32KHz 3455da627a4Swdenk reference PIT/RTC clock 34666ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 34766ca92a5Swdenk or XTAL/EXTAL) 348c609719bSwdenk 34966ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 35266ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 35375d1ea7fSwdenk See doc/README.MPC866 35475d1ea7fSwdenk 3556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 35675d1ea7fSwdenk 35775d1ea7fSwdenk Define this to measure the actual CPU clock instead 35875d1ea7fSwdenk of relying on the correctness of the configured 35975d1ea7fSwdenk values. Mostly useful for board bringup to make sure 36075d1ea7fSwdenk the PLL is locked at the intended frequency. Note 36175d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 36375d1ea7fSwdenk 364506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 365506f3918SHeiko Schocher 366506f3918SHeiko Schocher Define this option if you want to enable the 367506f3918SHeiko Schocher ICache only when Code runs from RAM. 368506f3918SHeiko Schocher 36966412c63SKumar Gala- 85xx CPU Options: 370ffd06e02SYork Sun CONFIG_SYS_PPC64 371ffd06e02SYork Sun 372ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 373ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 374ffd06e02SYork Sun compliance, among other possible reasons. 375ffd06e02SYork Sun 37666412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 37766412c63SKumar Gala 37866412c63SKumar Gala Defines the core time base clock divider ratio compared to the 37966412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 38066412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 38166412c63SKumar Gala 3828f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3838f29084aSKumar Gala 3848f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3858f29084aSKumar Gala tree nodes for the given platform. 3868f29084aSKumar Gala 387afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 388afa6b551SPrabhakar Kushwaha 389afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 390afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 391afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 392afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 393afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 394afa6b551SPrabhakar Kushwaha purpose. 395afa6b551SPrabhakar Kushwaha 39633eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 39733eee330SScott Wood 39833eee330SScott Wood Enables a workaround for erratum A004510. If set, 39933eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 40033eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 40133eee330SScott Wood 40233eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 40333eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 40433eee330SScott Wood 40533eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 40633eee330SScott Wood for which the A004510 workaround should be applied. 40733eee330SScott Wood 40833eee330SScott Wood The rest of SVR is either not relevant to the decision 40933eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 41033eee330SScott Wood p2041) or is implied by the build target, which controls 41133eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 41233eee330SScott Wood 41333eee330SScott Wood See Freescale App Note 4493 for more information about 41433eee330SScott Wood this erratum. 41533eee330SScott Wood 41674fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 41774fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 41874fa22edSPrabhakar Kushwaha requred during NOR boot. 41974fa22edSPrabhakar Kushwaha 42033eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 42133eee330SScott Wood 42233eee330SScott Wood This is the value to write into CCSR offset 0x18600 42333eee330SScott Wood according to the A004510 workaround. 42433eee330SScott Wood 42564501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 42664501c66SPriyanka Jain This value denotes start offset of DDR memory which is 42764501c66SPriyanka Jain connected exclusively to the DSP cores. 42864501c66SPriyanka Jain 429765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 430765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 431765b0bdbSPriyanka Jain which is directly connected to the DSP core. 432765b0bdbSPriyanka Jain 43364501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 43464501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 43564501c66SPriyanka Jain connected to the DSP core. 43664501c66SPriyanka Jain 437765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 438765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 439765b0bdbSPriyanka Jain 440b135991aSPriyanka Jain CONFIG_SYS_FSL_SINGLE_SOURCE_CLK 441b135991aSPriyanka Jain Single Source Clock is clocking mode present in some of FSL SoC's. 442b135991aSPriyanka Jain In this mode, a single differential clock is used to supply 443b135991aSPriyanka Jain clocks to the sysclock, ddrclock and usbclock. 444b135991aSPriyanka Jain 445fb4a2409SAneesh Bansal CONFIG_SYS_CPC_REINIT_F 446fb4a2409SAneesh Bansal This CONFIG is defined when the CPC is configured as SRAM at the 447fb4a2409SAneesh Bansal time of U-boot entry and is required to be re-initialized. 448fb4a2409SAneesh Bansal 449aade2004STang Yuantian CONFIG_DEEP_SLEEP 450aade2004STang Yuantian Inidcates this SoC supports deep sleep feature. If deep sleep is 451aade2004STang Yuantian supported, core will start to execute uboot when wakes up. 452aade2004STang Yuantian 4536cb461b4SDaniel Schwierzeck- Generic CPU options: 4542a1680e3SYork Sun CONFIG_SYS_GENERIC_GLOBAL_DATA 4552a1680e3SYork Sun Defines global data is initialized in generic board board_init_f(). 4562a1680e3SYork Sun If this macro is defined, global data is created and cleared in 4572a1680e3SYork Sun generic board board_init_f(). Without this macro, architecture/board 4582a1680e3SYork Sun should initialize global data before calling board_init_f(). 4592a1680e3SYork Sun 4606cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4616cb461b4SDaniel Schwierzeck 4626cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4636cb461b4SDaniel Schwierzeck values is arch specific. 4646cb461b4SDaniel Schwierzeck 4655614e71bSYork Sun CONFIG_SYS_FSL_DDR 4665614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4675614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4685614e71bSYork Sun SoCs. 4695614e71bSYork Sun 4705614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4715614e71bSYork Sun Freescale DDR memory-mapped register base. 4725614e71bSYork Sun 4735614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4745614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4755614e71bSYork Sun deskew training are not available. 4765614e71bSYork Sun 4775614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4785614e71bSYork Sun Freescale DDR1 controller. 4795614e71bSYork Sun 4805614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4815614e71bSYork Sun Freescale DDR2 controller. 4825614e71bSYork Sun 4835614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4845614e71bSYork Sun Freescale DDR3 controller. 4855614e71bSYork Sun 48634e026f9SYork Sun CONFIG_SYS_FSL_DDRC_GEN4 48734e026f9SYork Sun Freescale DDR4 controller. 48834e026f9SYork Sun 4899ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4909ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4919ac4ffbdSYork Sun 4925614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4935614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4945614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4955614e71bSYork Sun implemetation. 4965614e71bSYork Sun 4975614e71bSYork Sun CONFIG_SYS_FSL_DDR2 4985614e71bSYork Sun Board config to use DDR2. It can be eanbeld for SoCs with 4995614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 5005614e71bSYork Sun implementation. 5015614e71bSYork Sun 5025614e71bSYork Sun CONFIG_SYS_FSL_DDR3 5035614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 50434e026f9SYork Sun Freescale DDR3 or DDR3L controllers. 50534e026f9SYork Sun 50634e026f9SYork Sun CONFIG_SYS_FSL_DDR3L 50734e026f9SYork Sun Board config to use DDR3L. It can be enabled for SoCs with 50834e026f9SYork Sun DDR3L controllers. 50934e026f9SYork Sun 51034e026f9SYork Sun CONFIG_SYS_FSL_DDR4 51134e026f9SYork Sun Board config to use DDR4. It can be enabled for SoCs with 51234e026f9SYork Sun DDR4 controllers. 5135614e71bSYork Sun 5141b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 5151b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 5161b4175d6SPrabhakar Kushwaha 5171b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 5181b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 5191b4175d6SPrabhakar Kushwaha 520690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 521690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 522690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 523690e4258SPrabhakar Kushwaha 524690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 525690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 526690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 527690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 528690e4258SPrabhakar Kushwaha 52989ad7be8SPrabhakar Kushwaha CONFIG_SPL_FSL_PBL 53089ad7be8SPrabhakar Kushwaha It adds a target to create boot binary having SPL binary in PBI format 53189ad7be8SPrabhakar Kushwaha concatenated with u-boot binary. 53289ad7be8SPrabhakar Kushwaha 5334e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 5344e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 5354e5b1bd0SYork Sun 5364e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 5374e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 5384e5b1bd0SYork Sun 5396b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 5406b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 5416b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 5426b9e309aSYork Sun it could be different for ARM SoCs. 5436b9e309aSYork Sun 5446b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5456b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5466b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5476b1e1254SYork Sun SoCs with ARM core. 5486b1e1254SYork Sun 5490b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5510b953ffcSMarkus Klotzbuecher 5520b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5530b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5540b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5550b953ffcSMarkus Klotzbuecher 5566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5570b953ffcSMarkus Klotzbuecher 5580b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5590b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5600b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5610b953ffcSMarkus Klotzbuecher by this value. 5620b953ffcSMarkus Klotzbuecher 56392bbd64eSDaniel Schwierzeck- MIPS CPU options: 56492bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 56592bbd64eSDaniel Schwierzeck 56692bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 56792bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 56892bbd64eSDaniel Schwierzeck relocation. 56992bbd64eSDaniel Schwierzeck 57092bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 57192bbd64eSDaniel Schwierzeck 57292bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 57392bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 57492bbd64eSDaniel Schwierzeck Possible values are: 57592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 57692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 57792bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 57892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 57992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 58092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 58192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 58292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 58392bbd64eSDaniel Schwierzeck 58492bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 58592bbd64eSDaniel Schwierzeck 58692bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 58792bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 58892bbd64eSDaniel Schwierzeck 58992bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 59092bbd64eSDaniel Schwierzeck 59192bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 59292bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 59392bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 59492bbd64eSDaniel Schwierzeck 595b67d8816SChristian Riesch- ARM options: 596b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 597b67d8816SChristian Riesch 598b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 599b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 600b67d8816SChristian Riesch 6015356f545SAneesh V CONFIG_SYS_THUMB_BUILD 6025356f545SAneesh V 6035356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 6045356f545SAneesh V set for ARM architectures. Thumb instruction set provides 6055356f545SAneesh V better code density. For ARM architectures that support 6065356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 6075356f545SAneesh V GCC. 6085356f545SAneesh V 609c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 6100678587fSStephen Warren CONFIG_ARM_ERRATA_742230 6110678587fSStephen Warren CONFIG_ARM_ERRATA_743622 6120678587fSStephen Warren CONFIG_ARM_ERRATA_751472 613f71cbfe3SNitin Garg CONFIG_ARM_ERRATA_794072 614b7588e3bSNitin Garg CONFIG_ARM_ERRATA_761320 6150678587fSStephen Warren 6160678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 6170678587fSStephen Warren during U-Boot startup. Note that these options force the 6180678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 6190678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 6200678587fSStephen Warren set these options unless they apply! 6210678587fSStephen Warren 622795659dcSStephen Warren- CPU timer options: 623795659dcSStephen Warren CONFIG_SYS_HZ 624795659dcSStephen Warren 625795659dcSStephen Warren The frequency of the timer returned by get_timer(). 626795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 627795659dcSStephen Warren option must be set to 1000. 628795659dcSStephen Warren 6295da627a4Swdenk- Linux Kernel Interface: 630c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 631c609719bSwdenk 632c609719bSwdenk U-Boot stores all clock information in Hz 633c609719bSwdenk internally. For binary compatibility with older Linux 634c609719bSwdenk kernels (which expect the clocks passed in the 635c609719bSwdenk bd_info data to be in MHz) the environment variable 636c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 637c609719bSwdenk converts clock data to MHZ before passing it to the 638c609719bSwdenk Linux kernel. 639c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 640c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 641c609719bSwdenk default environment. 642c609719bSwdenk 6435da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6445da627a4Swdenk 64511ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6465da627a4Swdenk expect it to be in bytes, others in MB. 6475da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6485da627a4Swdenk 649fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 650f57f70aaSWolfgang Denk 651f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 652213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 653213bf8c8SGerald Van Baren concepts). 654213bf8c8SGerald Van Baren 655213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 656213bf8c8SGerald Van Baren * New libfdt-based support 657213bf8c8SGerald Van Baren * Adds the "fdt" command 6583bb342fcSKim Phillips * The bootm command automatically updates the fdt 659213bf8c8SGerald Van Baren 660b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 661b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 662b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 663b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 664f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 665c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 666f57f70aaSWolfgang Denk 66711ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 66811ccc33fSMarcel Ziswiler addresses 6693bb342fcSKim Phillips 6704e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6714e253137SKumar Gala 6724e253137SKumar Gala Board code has addition modification that it wants to make 6734e253137SKumar Gala to the flat device tree before handing it off to the kernel 6746705d81eSwdenk 6750267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6760267768eSMatthew McClintock 67711ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6780267768eSMatthew McClintock param header, the default value is zero if undefined. 6790267768eSMatthew McClintock 6803887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6813887c3fbSHeiko Schocher 6823887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6833887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6843887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6853887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6863887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6873887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6883887c3fbSHeiko Schocher 6897eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6907eb29398SIgor Grinberg 6917eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6927eb29398SIgor Grinberg machine type and must be used to specify the machine type 6937eb29398SIgor Grinberg number as it appears in the ARM machine registry 6947eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6957eb29398SIgor Grinberg Only boards that have multiple machine types supported 6967eb29398SIgor Grinberg in a single configuration file and the machine type is 6977eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6987eb29398SIgor Grinberg 6990b2f4ecaSNiklaus Giger- vxWorks boot parameters: 7000b2f4ecaSNiklaus Giger 7010b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 7020b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 7030b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 7040b2f4ecaSNiklaus Giger 7050b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 7060b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 7070b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 7080b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 7090b2f4ecaSNiklaus Giger 7100b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 7110b2f4ecaSNiklaus Giger 7120b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 7130b2f4ecaSNiklaus Giger 7140b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 7150b2f4ecaSNiklaus Giger the defaults discussed just above. 7160b2f4ecaSNiklaus Giger 7172c451f78SAneesh V- Cache Configuration: 7182c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 7192c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 7202c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 7212c451f78SAneesh V 72293bc2193SAneesh V- Cache Configuration for ARM: 72393bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 72493bc2193SAneesh V controller 72593bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 72693bc2193SAneesh V controller register space 72793bc2193SAneesh V 7286705d81eSwdenk- Serial Ports: 72948d0192fSAndreas Engel CONFIG_PL010_SERIAL 7306705d81eSwdenk 7316705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 7326705d81eSwdenk 73348d0192fSAndreas Engel CONFIG_PL011_SERIAL 7346705d81eSwdenk 7356705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 7366705d81eSwdenk 7376705d81eSwdenk CONFIG_PL011_CLOCK 7386705d81eSwdenk 7396705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 7406705d81eSwdenk the clock speed of the UARTs. 7416705d81eSwdenk 7426705d81eSwdenk CONFIG_PL01x_PORTS 7436705d81eSwdenk 7446705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 7456705d81eSwdenk define this to a list of base addresses for each (supported) 7466705d81eSwdenk port. See e.g. include/configs/versatile.h 7476705d81eSwdenk 748910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 749910f1ae3SJohn Rigby 750910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 751910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 752910f1ae3SJohn Rigby this variable to initialize the extra register. 753910f1ae3SJohn Rigby 754910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 755910f1ae3SJohn Rigby 756910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 757910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 758910f1ae3SJohn Rigby variable to flush the UART at init time. 759910f1ae3SJohn Rigby 760d57dee57SKaricheri, Muralidharan CONFIG_SERIAL_HW_FLOW_CONTROL 761d57dee57SKaricheri, Muralidharan 762d57dee57SKaricheri, Muralidharan Define this variable to enable hw flow control in serial driver. 763d57dee57SKaricheri, Muralidharan Current user of this option is drivers/serial/nsl16550.c driver 7646705d81eSwdenk 765c609719bSwdenk- Console Interface: 766c609719bSwdenk Depending on board, define exactly one serial port 767c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 768c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 769c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 770c609719bSwdenk 771c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 772c609719bSwdenk port routines must be defined elsewhere 773c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 774c609719bSwdenk 775c609719bSwdenk CONFIG_CFB_CONSOLE 776c609719bSwdenk Enables console device for a color framebuffer. Needs following 777c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 778c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 779c609719bSwdenk (default big endian) 780c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 781c609719bSwdenk rectangle fill 782c609719bSwdenk (cf. smiLynxEM) 783c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 784c609719bSwdenk bit-blit (cf. smiLynxEM) 785c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 786c609719bSwdenk (cols=pitch) 787c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 788c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 789c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 790c609719bSwdenk (0-5, cf. cfb_console.c) 791c609719bSwdenk VIDEO_FB_ADRS framebuffer address 792c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 793c609719bSwdenk (i.e. i8042_kbd_init()) 794c609719bSwdenk VIDEO_TSTC_FCT test char fct 795c609719bSwdenk (i.e. i8042_tstc) 796c609719bSwdenk VIDEO_GETC_FCT get char fct 797c609719bSwdenk (i.e. i8042_getc) 798c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 799c609719bSwdenk (requires blink timer 800c609719bSwdenk cf. i8042.c) 8016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 802c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 803c609719bSwdenk upper right corner 804602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 805c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 806c609719bSwdenk upper left corner 807a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 808a6c7ad2fSwdenk linux_logo.h for logo. 809a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 810c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 81111ccc33fSMarcel Ziswiler additional board info beside 812c609719bSwdenk the logo 813c609719bSwdenk 81433a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 81533a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 81633a35bbbSPali Rohár erase functions and limited graphics rendition control). 81733a35bbbSPali Rohár 818c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 819c609719bSwdenk default i/o. Serial console can be forced with 820c609719bSwdenk environment 'console=serial'. 821c609719bSwdenk 822a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 823a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 824a3ad8e26Swdenk the "silent" environment variable. See 825a3ad8e26Swdenk doc/README.silent for more information. 826a3ad8e26Swdenk 82745ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 82845ae2546SHeiko Schocher is 0x00. 82945ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 83045ae2546SHeiko Schocher is 0xa0. 83145ae2546SHeiko Schocher 832c609719bSwdenk- Console Baudrate: 833c609719bSwdenk CONFIG_BAUDRATE - in bps 834c609719bSwdenk Select one of the baudrates listed in 8356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 8366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 837c609719bSwdenk 838c92fac91SHeiko Schocher- Console Rx buffer length 839c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 840c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 8412b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 842c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 843c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 844c92fac91SHeiko Schocher the SMC. 845c92fac91SHeiko Schocher 8469558b48aSGraeme Russ- Pre-Console Buffer: 8479558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 8489558b48aSGraeme Russ initialised etc) all console output is silently discarded. 8499558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8509558b48aSGraeme Russ buffer any console messages prior to the console being 8519558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8529558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8539558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8549558b48aSGraeme Russ bytes are output before the console is initialised, the 8559558b48aSGraeme Russ earlier bytes are discarded. 8569558b48aSGraeme Russ 8579558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8589558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8599558b48aSGraeme Russ 860046a37bdSSonny Rao- Safe printf() functions 861046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 862046a37bdSSonny Rao the printf() functions. These are defined in 863046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 864046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 865046a37bdSSonny Rao If this option is not given then these functions will 866046a37bdSSonny Rao silently discard their buffer size argument - this means 867046a37bdSSonny Rao you are not getting any overflow checking in this case. 868046a37bdSSonny Rao 869c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 870c609719bSwdenk Delay before automatically booting the default image; 871c609719bSwdenk set to -1 to disable autoboot. 87293d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 87393d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 874c609719bSwdenk 875c609719bSwdenk See doc/README.autoboot for these options that 876c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 877c609719bSwdenk CONFIG_BOOT_RETRY_TIME 878c609719bSwdenk CONFIG_BOOT_RETRY_MIN 879c609719bSwdenk CONFIG_AUTOBOOT_KEYED 880c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 881c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 882c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 883c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 884c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 885c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 886c609719bSwdenk CONFIG_RESET_TO_RETRY 887c609719bSwdenk 888c609719bSwdenk- Autoboot Command: 889c609719bSwdenk CONFIG_BOOTCOMMAND 890c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 891c609719bSwdenk define a command string that is automatically executed 892c609719bSwdenk when no character is read on the console interface 893c609719bSwdenk within "Boot Delay" after reset. 894c609719bSwdenk 895c609719bSwdenk CONFIG_BOOTARGS 896c609719bSwdenk This can be used to pass arguments to the bootm 897c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 898c609719bSwdenk environment value "bootargs". 899c609719bSwdenk 900c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 901c609719bSwdenk The value of these goes into the environment as 902c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 903c609719bSwdenk as a convenience, when switching between booting from 90411ccc33fSMarcel Ziswiler RAM and NFS. 905c609719bSwdenk 906eda0ba38SHeiko Schocher- Bootcount: 907eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 908eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 909eda0ba38SHeiko Schocher cycle, see: 910eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 911eda0ba38SHeiko Schocher 912eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 913eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 914eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 915eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 916eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 917eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 918eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 919eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 920eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 921eda0ba38SHeiko Schocher 922c609719bSwdenk- Pre-Boot Commands: 923c609719bSwdenk CONFIG_PREBOOT 924c609719bSwdenk 925c609719bSwdenk When this option is #defined, the existence of the 926c609719bSwdenk environment variable "preboot" will be checked 927c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 928c609719bSwdenk countdown and/or running the auto-boot command resp. 929c609719bSwdenk entering interactive mode. 930c609719bSwdenk 931c609719bSwdenk This feature is especially useful when "preboot" is 932c609719bSwdenk automatically generated or modified. For an example 933c609719bSwdenk see the LWMON board specific code: here "preboot" is 934c609719bSwdenk modified when the user holds down a certain 935c609719bSwdenk combination of keys on the (special) keyboard when 936c609719bSwdenk booting the systems 937c609719bSwdenk 938c609719bSwdenk- Serial Download Echo Mode: 939c609719bSwdenk CONFIG_LOADS_ECHO 940c609719bSwdenk If defined to 1, all characters received during a 941c609719bSwdenk serial download (using the "loads" command) are 942c609719bSwdenk echoed back. This might be needed by some terminal 943c609719bSwdenk emulations (like "cu"), but may as well just take 944c609719bSwdenk time on others. This setting #define's the initial 945c609719bSwdenk value of the "loads_echo" environment variable. 946c609719bSwdenk 947602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 948c609719bSwdenk CONFIG_KGDB_BAUDRATE 949c609719bSwdenk Select one of the baudrates listed in 9506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 951c609719bSwdenk 952c609719bSwdenk- Monitor Functions: 953602ad3b3SJon Loeliger Monitor commands can be included or excluded 954602ad3b3SJon Loeliger from the build by using the #include files 955c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 956c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 957602ad3b3SJon Loeliger and augmenting with additional #define's 958602ad3b3SJon Loeliger for wanted commands. 959c609719bSwdenk 960602ad3b3SJon Loeliger The default command configuration includes all commands 961602ad3b3SJon Loeliger except those marked below with a "*". 962602ad3b3SJon Loeliger 963b401b73dSMarek Vasut CONFIG_CMD_AES AES 128 CBC encrypt/decrypt 964602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 965602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 966602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 967602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 968602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 969602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 970602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 97108d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 972602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 973710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 974602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 975602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 976602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 977a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 978a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 979a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 980a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 981602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 982602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 983246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 984602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 985602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9865e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 987fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 98888733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9890c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 99003e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 99103e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 99216f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 99316f4d933SStephen Warren that work for multiple fs types 994bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 995602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 99603e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 997602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 998602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9994d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 100053fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 1001a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 1002a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 1003bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 1004602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 1005602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 1006602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 1007602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 10088fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 10094d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 1010602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 10110c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 1012c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 1013602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 1014602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 1015602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 1016602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 10174d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 1018d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 1019d22c338eSJoe Hershberger (169.254.*.*) 1020602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 1021602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 10224d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 102302c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 102415a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1025602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1026a2681707SWolfgang Denk loop, loopw 10274d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1028602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1029602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1030602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 103168d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1032602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1033602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10344d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1035e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1036e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1037602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1038602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1039602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1040602ad3b3SJon Loeliger host 1041602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1042ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1043602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1044602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1045d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1046602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1047602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1048602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1049602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1050602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1051602ad3b3SJon Loeliger (4xx only) 1052f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10534d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 105402c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10557d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 105674de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1057602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10587a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10591fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1060da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1061da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1062602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1063602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1064c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10654d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 106689c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1067c609719bSwdenk 1068c609719bSwdenk EXAMPLE: If you want all functions except of network 1069c609719bSwdenk support you can write: 1070c609719bSwdenk 1071602ad3b3SJon Loeliger #include "config_cmd_all.h" 1072602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1073c609719bSwdenk 1074213bf8c8SGerald Van Baren Other Commands: 1075213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1076c609719bSwdenk 1077c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1078602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1079c609719bSwdenk what you (and your U-Boot users) are doing. Data 1080c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1081c609719bSwdenk 8260 (where accesses to the IMMR region must be 1082c609719bSwdenk uncached), and it cannot be disabled on all other 1083c609719bSwdenk systems where we (mis-) use the data cache to hold an 1084c609719bSwdenk initial stack and some data. 1085c609719bSwdenk 1086c609719bSwdenk 1087c609719bSwdenk XXX - this list needs to get updated! 1088c609719bSwdenk 1089a5ecbe62SWolfgang Denk- Regular expression support: 1090a5ecbe62SWolfgang Denk CONFIG_REGEX 1091a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1092a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1093a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1094a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1095a5ecbe62SWolfgang Denk 109645ba8077SSimon Glass- Device tree: 109745ba8077SSimon Glass CONFIG_OF_CONTROL 109845ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 109945ba8077SSimon Glass to configure its devices, instead of relying on statically 110045ba8077SSimon Glass compiled #defines in the board file. This option is 110145ba8077SSimon Glass experimental and only available on a few boards. The device 110245ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 110345ba8077SSimon Glass 11042c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 11052c0f79e4SSimon Glass be done using one of the two options below: 1106bbb0b128SSimon Glass 1107bbb0b128SSimon Glass CONFIG_OF_EMBED 1108bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1109bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1110bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1111bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1112bbb0b128SSimon Glass the global data structure as gd->blob. 111345ba8077SSimon Glass 11142c0f79e4SSimon Glass CONFIG_OF_SEPARATE 11152c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 11162c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 11172c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 11182c0f79e4SSimon Glass 11192c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 11202c0f79e4SSimon Glass 11212c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 11222c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 11232c0f79e4SSimon Glass still use the individual files if you need something more 11242c0f79e4SSimon Glass exotic. 11252c0f79e4SSimon Glass 1126c609719bSwdenk- Watchdog: 1127c609719bSwdenk CONFIG_WATCHDOG 1128c609719bSwdenk If this variable is defined, it enables watchdog 11296abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11306abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11316abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11326abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11336abe6fb6SDetlev Zundel available, then no further board specific code should 11346abe6fb6SDetlev Zundel be needed to use it. 11356abe6fb6SDetlev Zundel 11366abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11376abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11386abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11396abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1140c609719bSwdenk 1141c1551ea8Sstroese- U-Boot Version: 1142c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1143c1551ea8Sstroese If this variable is defined, an environment variable 1144c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1145c1551ea8Sstroese version as printed by the "version" command. 1146a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1147a1ea8e51SBenoît Thébaudeau next reset. 1148c1551ea8Sstroese 1149c609719bSwdenk- Real-Time Clock: 1150c609719bSwdenk 1151602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1152c609719bSwdenk has to be selected, too. Define exactly one of the 1153c609719bSwdenk following options: 1154c609719bSwdenk 1155c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1156c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11574e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1158c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11591cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1160c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11617f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 11623bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11639536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11644c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 116671d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 116771d19f30SHeiko Schocher RV3029 RTC. 1168c609719bSwdenk 1169b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1170b37c7e5eSwdenk must also be configured. See I2C Support, below. 1171b37c7e5eSwdenk 1172e92739d3SPeter Tyser- GPIO Support: 1173e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1174e92739d3SPeter Tyser 11755dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11765dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11775dec49caSChris Packham pins supported by a particular chip. 11785dec49caSChris Packham 1179e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1180e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1181e92739d3SPeter Tyser 1182c609719bSwdenk- Timestamp Support: 1183c609719bSwdenk 1184c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1185c609719bSwdenk (date and time) of an image is printed by image 1186c609719bSwdenk commands like bootm or iminfo. This option is 1187602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1188c609719bSwdenk 1189923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1190923c46f9SKarl O. Pinc Zero or more of the following: 1191923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1192923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1193923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1194923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1195923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1196923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1197923c46f9SKarl O. Pinc disk/part_efi.c 1198923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1199c609719bSwdenk 1200602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1201218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1202923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1203c609719bSwdenk 1204c609719bSwdenk- IDE Reset method: 12054d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 12064d13cbadSwdenk board configurations files but used nowhere! 1207c609719bSwdenk 12084d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 12094d13cbadSwdenk be performed by calling the function 12104d13cbadSwdenk ide_set_reset(int reset) 12114d13cbadSwdenk which has to be defined in a board specific file 1212c609719bSwdenk 1213c609719bSwdenk- ATAPI Support: 1214c609719bSwdenk CONFIG_ATAPI 1215c609719bSwdenk 1216c609719bSwdenk Set this to enable ATAPI support. 1217c609719bSwdenk 1218c40b2956Swdenk- LBA48 Support 1219c40b2956Swdenk CONFIG_LBA48 1220c40b2956Swdenk 1221c40b2956Swdenk Set this to enable support for disks larger than 137GB 12224b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1223c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1224c40b2956Swdenk support disks up to 2.1TB. 1225c40b2956Swdenk 12266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1227c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1228c40b2956Swdenk Default is 32bit. 1229c40b2956Swdenk 1230c609719bSwdenk- SCSI Support: 1231c609719bSwdenk At the moment only there is only support for the 1232c609719bSwdenk SYM53C8XX SCSI controller; define 1233c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1234c609719bSwdenk 12356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1238c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1239c609719bSwdenk devices. 12406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1241c609719bSwdenk 1242447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1243447c031bSStefan Reinauer SCSI devices found during the last scan. 1244447c031bSStefan Reinauer 1245c609719bSwdenk- NETWORK Support (PCI): 1246682011ffSwdenk CONFIG_E1000 1247ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1248ce5207e1SKyle Moffett 1249ce5207e1SKyle Moffett CONFIG_E1000_SPI 1250ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1251ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1252ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1253ce5207e1SKyle Moffett 1254ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1255ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1256ce5207e1SKyle Moffett example with the "sspi" command. 1257ce5207e1SKyle Moffett 1258ce5207e1SKyle Moffett CONFIG_CMD_E1000 1259ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1260ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1261682011ffSwdenk 1262ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 126311ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1264ac3315c2SAndre Schwarz 1265c609719bSwdenk CONFIG_EEPRO100 1266c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 126711ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1268c609719bSwdenk write routine for first time initialisation. 1269c609719bSwdenk 1270c609719bSwdenk CONFIG_TULIP 1271c609719bSwdenk Support for Digital 2114x chips. 1272c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1273c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1274c609719bSwdenk 1275c609719bSwdenk CONFIG_NATSEMI 1276c609719bSwdenk Support for National dp83815 chips. 1277c609719bSwdenk 1278c609719bSwdenk CONFIG_NS8382X 1279c609719bSwdenk Support for National dp8382[01] gigabit chips. 1280c609719bSwdenk 128145219c46Swdenk- NETWORK Support (other): 128245219c46Swdenk 1283c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1284c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1285c041e9d2SJens Scharsig 1286c041e9d2SJens Scharsig CONFIG_RMII 1287c041e9d2SJens Scharsig Define this to use reduced MII inteface 1288c041e9d2SJens Scharsig 1289c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1290c041e9d2SJens Scharsig If this defined, the driver is quiet. 1291c041e9d2SJens Scharsig The driver doen't show link status messages. 1292c041e9d2SJens Scharsig 1293efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1294efdd7319SRob Herring Support for the Calxeda XGMAC device 1295efdd7319SRob Herring 12963bb46d23SAshok CONFIG_LAN91C96 129745219c46Swdenk Support for SMSC's LAN91C96 chips. 129845219c46Swdenk 129945219c46Swdenk CONFIG_LAN91C96_BASE 130045219c46Swdenk Define this to hold the physical address 130145219c46Swdenk of the LAN91C96's I/O space 130245219c46Swdenk 130345219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 130445219c46Swdenk Define this to enable 32 bit addressing 130545219c46Swdenk 13063bb46d23SAshok CONFIG_SMC91111 1307f39748aeSwdenk Support for SMSC's LAN91C111 chip 1308f39748aeSwdenk 1309f39748aeSwdenk CONFIG_SMC91111_BASE 1310f39748aeSwdenk Define this to hold the physical address 1311f39748aeSwdenk of the device (I/O space) 1312f39748aeSwdenk 1313f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1314f39748aeSwdenk Define this if data bus is 32 bits 1315f39748aeSwdenk 1316f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1317f39748aeSwdenk Define this to use i/o functions instead of macros 1318f39748aeSwdenk (some hardware wont work with macros) 1319f39748aeSwdenk 1320dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1321dc02badaSHeiko Schocher Support for davinci emac 1322dc02badaSHeiko Schocher 1323dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1324dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1325dc02badaSHeiko Schocher 1326b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1327b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1328b3dbf4a5SMacpaul Lin 1329b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1330b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1331b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1332b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1333b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1334b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1335b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1336b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1337b3dbf4a5SMacpaul Lin 1338c2fff331SMike Rapoport CONFIG_SMC911X 1339557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1340557b377dSJens Gehrlein 1341c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1342557b377dSJens Gehrlein Define this to hold the physical address 1343557b377dSJens Gehrlein of the device (I/O space) 1344557b377dSJens Gehrlein 1345c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1346557b377dSJens Gehrlein Define this if data bus is 32 bits 1347557b377dSJens Gehrlein 1348c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1349557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1350557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1351c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1352557b377dSJens Gehrlein 13533d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13543d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13553d0075faSYoshihiro Shimoda 13563d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13573d0075faSYoshihiro Shimoda Define the number of ports to be used 13583d0075faSYoshihiro Shimoda 13593d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13603d0075faSYoshihiro Shimoda Define the ETH PHY's address 13613d0075faSYoshihiro Shimoda 136268260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 136368260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 136468260aabSYoshihiro Shimoda 13655e124724SVadim Bendebury- TPM Support: 136690899cc0SChe-liang Chiou CONFIG_TPM 136790899cc0SChe-liang Chiou Support TPM devices. 136890899cc0SChe-liang Chiou 13691b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13701b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13711b393db5STom Wai-Hong Tam per system is supported at this time. 13721b393db5STom Wai-Hong Tam 13731b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13741b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13751b393db5STom Wai-Hong Tam 13761b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13771b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13781b393db5STom Wai-Hong Tam 13791b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13801b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13811b393db5STom Wai-Hong Tam 1382c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1383c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1384c01939c7SDirk Eibach 138590899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 13865e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 13875e124724SVadim Bendebury per system is supported at this time. 13885e124724SVadim Bendebury 13895e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 13905e124724SVadim Bendebury Base address where the generic TPM device is mapped 13915e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 13925e124724SVadim Bendebury 0xfed40000. 13935e124724SVadim Bendebury 1394be6c1529SReinhard Pfau CONFIG_CMD_TPM 1395be6c1529SReinhard Pfau Add tpm monitor functions. 1396be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1397be6c1529SReinhard Pfau provides monitor access to authorized functions. 1398be6c1529SReinhard Pfau 1399be6c1529SReinhard Pfau CONFIG_TPM 1400be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1401be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1402be6c1529SReinhard Pfau Requires support for a TPM device. 1403be6c1529SReinhard Pfau 1404be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1405be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1406be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1407be6c1529SReinhard Pfau 1408c609719bSwdenk- USB Support: 1409c609719bSwdenk At the moment only the UHCI host controller is 14104d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1411c609719bSwdenk CONFIG_USB_UHCI to enable it. 1412c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 141330d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1414c609719bSwdenk storage devices. 1415c609719bSwdenk Note: 1416c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1417c609719bSwdenk (TEAC FD-05PUB). 14184d13cbadSwdenk MPC5200 USB requires additional defines: 14194d13cbadSwdenk CONFIG_USB_CLOCK 14204d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1421307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1422307ecb6dSEric Millbrandt for USB on PSC3 14234d13cbadSwdenk CONFIG_USB_CONFIG 14244d13cbadSwdenk for differential drivers: 0x00001000 14254d13cbadSwdenk for single ended drivers: 0x00005000 1426307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1427307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1429fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1430fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14314d13cbadSwdenk 14329ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14339ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14349ab4ce22SSimon Glass 1435aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1436aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1437aa155058SKuo-Jung Su 143816c8d5e7SWolfgang Denk- USB Device: 143916c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 144016c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 144116c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 144211ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 144316c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 144416c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 144516c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 144616c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 144716c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 144816c8d5e7SWolfgang Denk a Linux host by 144916c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 145016c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 145116c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 145216c8d5e7SWolfgang Denk might be defined in YourBoardName.h 145316c8d5e7SWolfgang Denk 145416c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 145516c8d5e7SWolfgang Denk Define this to build a UDC device 145616c8d5e7SWolfgang Denk 145716c8d5e7SWolfgang Denk CONFIG_USB_TTY 145816c8d5e7SWolfgang Denk Define this to have a tty type of device available to 145916c8d5e7SWolfgang Denk talk to the UDC device 146016c8d5e7SWolfgang Denk 1461f9da0f89SVipin KUMAR CONFIG_USBD_HS 1462f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1463f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1464f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1465f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1466f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1467f9da0f89SVipin KUMAR speed. 1468f9da0f89SVipin KUMAR 14696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 147016c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 147116c8d5e7SWolfgang Denk be set to usbtty. 147216c8d5e7SWolfgang Denk 147316c8d5e7SWolfgang Denk mpc8xx: 14746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 147516c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 147716c8d5e7SWolfgang Denk 14786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 147916c8d5e7SWolfgang Denk Derive USB clock from brgclk 14806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 148116c8d5e7SWolfgang Denk 148216c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 148316c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 148416c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 148516c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 148616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 148716c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 148816c8d5e7SWolfgang Denk 148916c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 149016c8d5e7SWolfgang Denk Define this string as the name of your company for 149116c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 149216c8d5e7SWolfgang Denk 149316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 149416c8d5e7SWolfgang Denk Define this string as the name of your product 149516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 149616c8d5e7SWolfgang Denk 149716c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 149816c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 149916c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 150016c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 150116c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 150216c8d5e7SWolfgang Denk 150316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 150416c8d5e7SWolfgang Denk Define this as the unique Product ID 150516c8d5e7SWolfgang Denk for your device 150616c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1507c609719bSwdenk 1508d70a560fSIgor Grinberg- ULPI Layer Support: 1509d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1510d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1511d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1512d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1513d70a560fSIgor Grinberg viewport is supported. 1514d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1515d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 15166d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 15176d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 15186d365ea0SLucas Stach the appropriate value in Hz. 1519c609719bSwdenk 1520c609719bSwdenk- MMC Support: 1521c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1522c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1523c609719bSwdenk accessed from the boot prompt by mapping the device 1524c609719bSwdenk to physical memory similar to flash. Command line is 1525602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1526602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1527c609719bSwdenk 1528afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1529afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1530afb35666SYoshihiro Shimoda 1531afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1532afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1533afb35666SYoshihiro Shimoda 1534afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1535afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1536afb35666SYoshihiro Shimoda 1537b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1538b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1539b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1540b3ba6e94STom Rini 1541b3ba6e94STom Rini CONFIG_CMD_DFU 1542b3ba6e94STom Rini This enables the command "dfu" which is used to have 1543b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1544b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1545b3ba6e94STom Rini set and define the alt settings to expose to the host. 1546b3ba6e94STom Rini 1547b3ba6e94STom Rini CONFIG_DFU_MMC 1548b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1549b3ba6e94STom Rini 1550c6631764SPantelis Antoniou CONFIG_DFU_NAND 1551c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1552c6631764SPantelis Antoniou 1553a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1554a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1555a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1556a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1557a9479f04SAfzal Mohammed one that would help mostly the developer. 1558a9479f04SAfzal Mohammed 1559e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1560e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1561e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1562e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1563e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1564e7e75c70SHeiko Schocher 1565ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1566ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1567ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1568ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1569ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1570ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1571ea2453d5SPantelis Antoniou 1572001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1573001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1574001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1575001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1576001a8319SHeiko Schocher 1577001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1578001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1579001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1580001a8319SHeiko Schocher sending again an USB request to the device. 1581001a8319SHeiko Schocher 15826705d81eSwdenk- Journaling Flash filesystem support: 15836705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 15846705d81eSwdenk CONFIG_JFFS2_NAND_DEV 15856705d81eSwdenk Define these for a default partition on a NAND device 15866705d81eSwdenk 15876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 15886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 15896705d81eSwdenk Define these for a default partition on a NOR device 15906705d81eSwdenk 15916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 15926705d81eSwdenk Define this to create an own partition. You have to provide a 15936705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 15946705d81eSwdenk 15956705d81eSwdenk If you define only one JFFS2 partition you may also want to 15966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 15976705d81eSwdenk to disable the command chpart. This is the default when you 15986705d81eSwdenk have not defined a custom partition 15996705d81eSwdenk 1600c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1601c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1602656f4c65SDonggeun Kim 1603656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1604656f4c65SDonggeun Kim file in FAT formatted partition. 1605656f4c65SDonggeun Kim 1606656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1607656f4c65SDonggeun Kim user to write files to FAT. 1608c30a15e5SDonggeun Kim 160984cd9327SGabe BlackCBFS (Coreboot Filesystem) support 161084cd9327SGabe Black CONFIG_CMD_CBFS 161184cd9327SGabe Black 161284cd9327SGabe Black Define this to enable support for reading from a Coreboot 161384cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 161484cd9327SGabe Black and cbfsload. 161584cd9327SGabe Black 1616c609719bSwdenk- Keyboard Support: 1617c609719bSwdenk CONFIG_ISA_KEYBOARD 1618c609719bSwdenk 1619c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1620c609719bSwdenk support 1621c609719bSwdenk 1622c609719bSwdenk CONFIG_I8042_KBD 1623c609719bSwdenk Standard PC keyboard driver with US (is default) and 1624c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1625c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1626c609719bSwdenk for cfb_console. Supports cursor blinking. 1627c609719bSwdenk 1628713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1629713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1630713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1631713cb680SHung-ying Tyan which provides key scans on request. 1632713cb680SHung-ying Tyan 1633c609719bSwdenk- Video support: 1634c609719bSwdenk CONFIG_VIDEO 1635c609719bSwdenk 1636c609719bSwdenk Define this to enable video support (for output to 1637c609719bSwdenk video). 1638c609719bSwdenk 1639c609719bSwdenk CONFIG_VIDEO_CT69000 1640c609719bSwdenk 1641c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1642c609719bSwdenk 1643c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1644eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1645eeb1b77bSwdenk video output is selected via environment 'videoout' 1646eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1647eeb1b77bSwdenk assumed. 1648c609719bSwdenk 1649eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 165011ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1651eeb1b77bSwdenk are possible: 1652eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1653eeb1b77bSwdenk Following standard modes are supported (* is default): 1654eeb1b77bSwdenk 1655eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1656eeb1b77bSwdenk -------------+--------------------------------------------- 1657eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1658eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1659eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1660eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1661eeb1b77bSwdenk -------------+--------------------------------------------- 1662c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1663c609719bSwdenk 1664eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 16657817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1666eeb1b77bSwdenk 1667eeb1b77bSwdenk 1668a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1669a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1670a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1671a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1672a6c7ad2fSwdenk 16737d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 16747d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 16757d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 16767d3053fbSTimur Tabi support, and should also define these other macros: 16777d3053fbSTimur Tabi 16787d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 16797d3053fbSTimur Tabi CONFIG_VIDEO 16807d3053fbSTimur Tabi CONFIG_CMD_BMP 16817d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 16827d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 16837d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 16847d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 16857d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 16867d3053fbSTimur Tabi 1687ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1688ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1689ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1690ba8e76bdSTimur Tabi description of this variable. 16917d3053fbSTimur Tabi 1692058d59b0SSimon Glass CONFIG_VIDEO_VGA 1693058d59b0SSimon Glass 1694058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1695058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1696058d59b0SSimon Glass driver. 1697058d59b0SSimon Glass 1698058d59b0SSimon Glass 1699682011ffSwdenk- Keyboard Support: 1700682011ffSwdenk CONFIG_KEYBOARD 1701682011ffSwdenk 1702682011ffSwdenk Define this to enable a custom keyboard support. 1703682011ffSwdenk This simply calls drv_keyboard_init() which must be 1704682011ffSwdenk defined in your board-specific files. 1705682011ffSwdenk The only board using this so far is RBC823. 1706a6c7ad2fSwdenk 1707c609719bSwdenk- LCD Support: CONFIG_LCD 1708c609719bSwdenk 1709c609719bSwdenk Define this to enable LCD support (for output to LCD 1710c609719bSwdenk display); also select one of the supported displays 1711c609719bSwdenk by defining one of these: 1712c609719bSwdenk 171339cf4804SStelian Pop CONFIG_ATMEL_LCD: 171439cf4804SStelian Pop 171539cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 171639cf4804SStelian Pop 1717fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1718c609719bSwdenk 1719fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1720c609719bSwdenk 1721fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1722c609719bSwdenk 1723fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1724fd3103bbSwdenk Active, color, single scan. 1725fd3103bbSwdenk 1726fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1727fd3103bbSwdenk 1728fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1729c609719bSwdenk Active, color, single scan. 1730c609719bSwdenk 1731c609719bSwdenk CONFIG_SHARP_16x9 1732c609719bSwdenk 1733c609719bSwdenk Sharp 320x240. Active, color, single scan. 1734c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1735c609719bSwdenk 1736c609719bSwdenk CONFIG_SHARP_LQ64D341 1737c609719bSwdenk 1738c609719bSwdenk Sharp LQ64D341 display, 640x480. 1739c609719bSwdenk Active, color, single scan. 1740c609719bSwdenk 1741c609719bSwdenk CONFIG_HLD1045 1742c609719bSwdenk 1743c609719bSwdenk HLD1045 display, 640x480. 1744c609719bSwdenk Active, color, single scan. 1745c609719bSwdenk 1746c609719bSwdenk CONFIG_OPTREX_BW 1747c609719bSwdenk 1748c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1749c609719bSwdenk or 1750c609719bSwdenk Hitachi LMG6912RPFC-00T 1751c609719bSwdenk or 1752c609719bSwdenk Hitachi SP14Q002 1753c609719bSwdenk 1754c609719bSwdenk 320x240. Black & white. 1755c609719bSwdenk 1756c609719bSwdenk Normally display is black on white background; define 17576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1758c609719bSwdenk 1759676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1760676d319eSSimon Glass 1761676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1762676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1763676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1764676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1765676d319eSSimon Glass a per-section basis. 1766676d319eSSimon Glass 17670d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 17680d89efefSSimon Glass 17690d89efefSSimon Glass When the console need to be scrolled, this is the number of 17700d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 17710d89efefSSimon Glass the console jump but can help speed up operation when scrolling 17720d89efefSSimon Glass is slow. 1773676d319eSSimon Glass 177445d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 177545d7f525STom Wai-Hong Tam 177645d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 177745d7f525STom Wai-Hong Tam 1778735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1779735987c5STom Wai-Hong Tam 1780735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1781735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1782735987c5STom Wai-Hong Tam 17837152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1784d791b1dcSwdenk 1785d791b1dcSwdenk If this option is set, the environment is checked for 1786d791b1dcSwdenk a variable "splashimage". If found, the usual display 1787d791b1dcSwdenk of logo, copyright and system information on the LCD 1788e94d2cd9Swdenk is suppressed and the BMP image at the address 1789d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1790d791b1dcSwdenk console is redirected to the "nulldev", too. This 1791d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1792d791b1dcSwdenk loaded very quickly after power-on. 1793d791b1dcSwdenk 1794c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1795c0880485SNikita Kiryanov 1796c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1797c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 17981551df35STom Rini (see README.displaying-bmps). 1799c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1800c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1801c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1802c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1803c0880485SNikita Kiryanov there is no need to set this option. 1804c0880485SNikita Kiryanov 18051ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 18061ca298ceSMatthias Weisser 18071ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 18081ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 18091ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 18101ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 18111ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 18121ca298ceSMatthias Weisser specify 'm' for centering the image. 18131ca298ceSMatthias Weisser 18141ca298ceSMatthias Weisser Example: 18151ca298ceSMatthias Weisser setenv splashpos m,m 18161ca298ceSMatthias Weisser => image at center of screen 18171ca298ceSMatthias Weisser 18181ca298ceSMatthias Weisser setenv splashpos 30,20 18191ca298ceSMatthias Weisser => image at x = 30 and y = 20 18201ca298ceSMatthias Weisser 18211ca298ceSMatthias Weisser setenv splashpos -10,m 18221ca298ceSMatthias Weisser => vertically centered image 18231ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 18241ca298ceSMatthias Weisser 182598f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 182698f4a3dfSStefan Roese 182798f4a3dfSStefan Roese If this option is set, additionally to standard BMP 182898f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 182998f4a3dfSStefan Roese splashscreen support or the bmp command. 183098f4a3dfSStefan Roese 1831d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1832d5011762SAnatolij Gustschin 1833d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1834d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1835d5011762SAnatolij Gustschin bmp command. 1836d5011762SAnatolij Gustschin 1837f2b96dfbSLei Wen- Do compresssing for memory range: 1838f2b96dfbSLei Wen CONFIG_CMD_ZIP 1839f2b96dfbSLei Wen 1840f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1841f2b96dfbSLei Wen to compress the specified memory at its best effort. 1842f2b96dfbSLei Wen 1843c29fdfc1Swdenk- Compression support: 18448ef70478SKees Cook CONFIG_GZIP 18458ef70478SKees Cook 18468ef70478SKees Cook Enabled by default to support gzip compressed images. 18478ef70478SKees Cook 1848c29fdfc1Swdenk CONFIG_BZIP2 1849c29fdfc1Swdenk 1850c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1851c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1852c29fdfc1Swdenk compressed images are supported. 1853c29fdfc1Swdenk 1854c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 18556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1856c29fdfc1Swdenk be at least 4MB. 1857d791b1dcSwdenk 1858fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1859fc9c1727SLuigi 'Comio' Mantellini 1860fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1861fc9c1727SLuigi 'Comio' Mantellini images is included. 1862fc9c1727SLuigi 'Comio' Mantellini 1863fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1864fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1865fc9c1727SLuigi 'Comio' Mantellini formula: 1866fc9c1727SLuigi 'Comio' Mantellini 1867fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1868fc9c1727SLuigi 'Comio' Mantellini 1869fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1870fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1871fc9c1727SLuigi 'Comio' Mantellini 1872fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1873fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1874fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1875fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1876fc9c1727SLuigi 'Comio' Mantellini 1877fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1878fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 18796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1880fc9c1727SLuigi 'Comio' Mantellini 18818ef70478SKees Cook CONFIG_LZO 18828ef70478SKees Cook 18838ef70478SKees Cook If this option is set, support for LZO compressed images 18848ef70478SKees Cook is included. 18858ef70478SKees Cook 188617ea1177Swdenk- MII/PHY support: 188717ea1177Swdenk CONFIG_PHY_ADDR 188817ea1177Swdenk 188917ea1177Swdenk The address of PHY on MII bus. 189017ea1177Swdenk 189117ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 189217ea1177Swdenk 189317ea1177Swdenk The clock frequency of the MII bus 189417ea1177Swdenk 189517ea1177Swdenk CONFIG_PHY_GIGE 189617ea1177Swdenk 189717ea1177Swdenk If this option is set, support for speed/duplex 189811ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 189917ea1177Swdenk 190017ea1177Swdenk CONFIG_PHY_RESET_DELAY 190117ea1177Swdenk 190217ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 190317ea1177Swdenk reset before any MII register access is possible. 190417ea1177Swdenk For such PHY, set this option to the usec delay 190517ea1177Swdenk required. (minimum 300usec for LXT971A) 190617ea1177Swdenk 190717ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 190817ea1177Swdenk 190917ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 191017ea1177Swdenk command issued before MII status register can be read 191117ea1177Swdenk 1912c609719bSwdenk- Ethernet address: 1913c609719bSwdenk CONFIG_ETHADDR 1914c68a05feSrichardretanubun CONFIG_ETH1ADDR 1915c609719bSwdenk CONFIG_ETH2ADDR 1916c609719bSwdenk CONFIG_ETH3ADDR 1917c68a05feSrichardretanubun CONFIG_ETH4ADDR 1918c68a05feSrichardretanubun CONFIG_ETH5ADDR 1919c609719bSwdenk 192011ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 192111ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1922c609719bSwdenk is not determined automatically. 1923c609719bSwdenk 1924c609719bSwdenk- IP address: 1925c609719bSwdenk CONFIG_IPADDR 1926c609719bSwdenk 1927c609719bSwdenk Define a default value for the IP address to use for 192811ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1929c609719bSwdenk determined through e.g. bootp. 19301ebcd654SWolfgang Denk (Environment variable "ipaddr") 1931c609719bSwdenk 1932c609719bSwdenk- Server IP address: 1933c609719bSwdenk CONFIG_SERVERIP 1934c609719bSwdenk 1935c609719bSwdenk Defines a default value for the IP address of a TFTP 1936c609719bSwdenk server to contact when using the "tftboot" command. 19371ebcd654SWolfgang Denk (Environment variable "serverip") 1938c609719bSwdenk 193997cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 194097cfe861SRobin Getz 194197cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 194297cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 194397cfe861SRobin Getz 19441ebcd654SWolfgang Denk- Gateway IP address: 19451ebcd654SWolfgang Denk CONFIG_GATEWAYIP 19461ebcd654SWolfgang Denk 19471ebcd654SWolfgang Denk Defines a default value for the IP address of the 19481ebcd654SWolfgang Denk default router where packets to other networks are 19491ebcd654SWolfgang Denk sent to. 19501ebcd654SWolfgang Denk (Environment variable "gatewayip") 19511ebcd654SWolfgang Denk 19521ebcd654SWolfgang Denk- Subnet mask: 19531ebcd654SWolfgang Denk CONFIG_NETMASK 19541ebcd654SWolfgang Denk 19551ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 19561ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 19571ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 19581ebcd654SWolfgang Denk forwarded through a router. 19591ebcd654SWolfgang Denk (Environment variable "netmask") 19601ebcd654SWolfgang Denk 196153a5c424SDavid Updegraff- Multicast TFTP Mode: 196253a5c424SDavid Updegraff CONFIG_MCAST_TFTP 196353a5c424SDavid Updegraff 196453a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 196553a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 196611ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 196753a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 196853a5c424SDavid Updegraff multicast group. 196953a5c424SDavid Updegraff 1970c609719bSwdenk- BOOTP Recovery Mode: 1971c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1972c609719bSwdenk 1973c609719bSwdenk If you have many targets in a network that try to 1974c609719bSwdenk boot using BOOTP, you may want to avoid that all 1975c609719bSwdenk systems send out BOOTP requests at precisely the same 1976c609719bSwdenk moment (which would happen for instance at recovery 1977c609719bSwdenk from a power failure, when all systems will try to 1978c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1979c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1980c609719bSwdenk inserted before sending out BOOTP requests. The 19816c33c785SWolfgang Denk following delays are inserted then: 1982c609719bSwdenk 1983c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1984c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1985c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1986c609719bSwdenk 4th and following 1987c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1988c609719bSwdenk 1989fe389a82Sstroese- DHCP Advanced Options: 19901fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 19911fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1992fe389a82Sstroese 19931fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 19941fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 19951fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 19961fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 19971fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 19981fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 19991fe80d79SJon Loeliger CONFIG_BOOTP_DNS 20001fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 20011fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 20021fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 20031fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 20041fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 20052c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 2006fe389a82Sstroese 20075d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 20085d110f0aSWilson Callan environment variable, not the BOOTP server. 2009fe389a82Sstroese 20102c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 20112c00e099SJoe Hershberger after the configured retry count, the call will fail 20122c00e099SJoe Hershberger instead of starting over. This can be used to fail over 20132c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 20142c00e099SJoe Hershberger is not available. 20152c00e099SJoe Hershberger 2016fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 2017fe389a82Sstroese serverip from a DHCP server, it is possible that more 2018fe389a82Sstroese than one DNS serverip is offered to the client. 2019fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2020fe389a82Sstroese serverip will be stored in the additional environment 2021fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2022fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 20231fe80d79SJon Loeliger is defined. 2024fe389a82Sstroese 2025fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2026fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2027fe389a82Sstroese need the hostname of the DHCP requester. 20285d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 20291fe80d79SJon Loeliger of the "hostname" environment variable is passed as 20301fe80d79SJon Loeliger option 12 to the DHCP server. 2031fe389a82Sstroese 2032d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2033d9a2f416SAras Vaichas 2034d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2035d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2036d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2037d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2038d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2039d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2040d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2041d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2042d9a2f416SAras Vaichas that one of the retries will be successful but note that 2043d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2044d9a2f416SAras Vaichas this delay. 2045d9a2f416SAras Vaichas 2046d22c338eSJoe Hershberger - Link-local IP address negotiation: 2047d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2048d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2049d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2050d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2051d22c338eSJoe Hershberger 2052d22c338eSJoe Hershberger See doc/README.link-local for more information. 2053d22c338eSJoe Hershberger 2054a3d991bdSwdenk - CDP Options: 2055a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2056a3d991bdSwdenk 2057a3d991bdSwdenk The device id used in CDP trigger frames. 2058a3d991bdSwdenk 2059a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2060a3d991bdSwdenk 2061a3d991bdSwdenk A two character string which is prefixed to the MAC address 2062a3d991bdSwdenk of the device. 2063a3d991bdSwdenk 2064a3d991bdSwdenk CONFIG_CDP_PORT_ID 2065a3d991bdSwdenk 2066a3d991bdSwdenk A printf format string which contains the ascii name of 2067a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 206811ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2069a3d991bdSwdenk 2070a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2071a3d991bdSwdenk 2072a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2073a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2074a3d991bdSwdenk 2075a3d991bdSwdenk CONFIG_CDP_VERSION 2076a3d991bdSwdenk 2077a3d991bdSwdenk An ascii string containing the version of the software. 2078a3d991bdSwdenk 2079a3d991bdSwdenk CONFIG_CDP_PLATFORM 2080a3d991bdSwdenk 2081a3d991bdSwdenk An ascii string containing the name of the platform. 2082a3d991bdSwdenk 2083a3d991bdSwdenk CONFIG_CDP_TRIGGER 2084a3d991bdSwdenk 2085a3d991bdSwdenk A 32bit integer sent on the trigger. 2086a3d991bdSwdenk 2087a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2088a3d991bdSwdenk 2089a3d991bdSwdenk A 16bit integer containing the power consumption of the 2090a3d991bdSwdenk device in .1 of milliwatts. 2091a3d991bdSwdenk 2092a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2093a3d991bdSwdenk 2094a3d991bdSwdenk A byte containing the id of the VLAN. 2095a3d991bdSwdenk 2096c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2097c609719bSwdenk 2098c609719bSwdenk Several configurations allow to display the current 2099c609719bSwdenk status using a LED. For instance, the LED will blink 2100c609719bSwdenk fast while running U-Boot code, stop blinking as 2101c609719bSwdenk soon as a reply to a BOOTP request was received, and 2102c609719bSwdenk start blinking slow once the Linux kernel is running 2103c609719bSwdenk (supported by a status LED driver in the Linux 2104c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2105c609719bSwdenk feature in U-Boot. 2106c609719bSwdenk 21071df7bbbaSIgor Grinberg Additional options: 21081df7bbbaSIgor Grinberg 21091df7bbbaSIgor Grinberg CONFIG_GPIO_LED 21101df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 21111df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 21121df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 21131df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 21141df7bbbaSIgor Grinberg 21159dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 21169dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 21179dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 21189dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 21199dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 21209dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 21219dfdcdfeSIgor Grinberg 2122c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2123c609719bSwdenk 2124c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2125c609719bSwdenk on those systems that support this (optional) 2126c609719bSwdenk feature, like the TQM8xxL modules. 2127c609719bSwdenk 21283f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2129c609719bSwdenk 21303f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 21313f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 21323f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 21333f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 21343f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 21353f4978c7SHeiko Schocher interface. 21363f4978c7SHeiko Schocher 21373f4978c7SHeiko Schocher ported i2c driver to the new framework: 2138ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2139ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2140ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2141ea818dbbSHeiko Schocher for defining speed and slave address 2142ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2143ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2144ea818dbbSHeiko Schocher for defining speed and slave address 2145ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2146ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2147ea818dbbSHeiko Schocher for defining speed and slave address 2148ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2149ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2150ea818dbbSHeiko Schocher for defining speed and slave address 21513f4978c7SHeiko Schocher 215200f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 215300f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 215400f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 215500f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 215600f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 215700f792e0SHeiko Schocher bus. 215800f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 215900f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 216000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 216100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 216200f792e0SHeiko Schocher second bus. 216300f792e0SHeiko Schocher 21641f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 21651f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 21661f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 21671f2ba722SSimon Glass 100000 and the slave addr 0! 21681f2ba722SSimon Glass 2169880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2170880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2171880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2172880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2173880540deSDirk Eibach 2174fac96408Strem - drivers/i2c/i2c_mxc.c 2175fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2176fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2177fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2178fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2179fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2180fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2181fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2182fac96408Strem If thoses defines are not set, default value is 100000 2183fac96408Strem for speed, and 0 for slave. 2184fac96408Strem 21851086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 21861086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 21871086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 21881086bfa9SNobuhiro Iwamatsu 21891086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 21901086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 21911086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 21921086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 21931086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 21941086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 21951086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 21961086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 21971086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 21981086bfa9SNobuhiro Iwamatsu 21992035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 22002035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 22012035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 22022035d77dSNobuhiro Iwamatsu 22032035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 22042035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 22052035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 22062035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 22072035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 22082035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 22092035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 22102035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 22112035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 22122035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 22132035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 22142035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 22152035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 22162035d77dSNobuhiro Iwamatsu 22176789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 22186789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 22196789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 22206789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 22216789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 22226789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 22236789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 22246789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 22256789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 22266789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 22276789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 22286789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 22296789e84eSHeiko Schocher 22300bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 22310bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 22320bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 22330bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 22340bdffe71SHeiko Schocher 2235e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2236e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2237e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2238e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2239e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2240e717fc6dSNaveen Krishna Ch 22413f4978c7SHeiko Schocher additional defines: 22423f4978c7SHeiko Schocher 22433f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 22443f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 22453f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 22463f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 22473f4978c7SHeiko Schocher omit this define. 22483f4978c7SHeiko Schocher 22493f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 22503f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 22513f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 22523f4978c7SHeiko Schocher omit this define. 22533f4978c7SHeiko Schocher 22543f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 22553f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 22563f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 22573f4978c7SHeiko Schocher define. 22583f4978c7SHeiko Schocher 22593f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 22603f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 22613f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 22623f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 22633f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 22643f4978c7SHeiko Schocher 22653f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 22663f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 22673f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 22683f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 22693f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 22703f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 22713f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 22723f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 22733f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 22743f4978c7SHeiko Schocher } 22753f4978c7SHeiko Schocher 22763f4978c7SHeiko Schocher which defines 22773f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2278ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2279ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2280ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2281ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2282ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 22833f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2284ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2285ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 22863f4978c7SHeiko Schocher 22873f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 22883f4978c7SHeiko Schocher 2289ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 22903f4978c7SHeiko Schocher 22913f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 22923f4978c7SHeiko Schocher provides the following compelling advantages: 22933f4978c7SHeiko Schocher 22943f4978c7SHeiko Schocher - more than one i2c adapter is usable 22953f4978c7SHeiko Schocher - approved multibus support 22963f4978c7SHeiko Schocher - better i2c mux support 22973f4978c7SHeiko Schocher 22983f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 22993f4978c7SHeiko Schocher 2300ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2301ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2302ea818dbbSHeiko Schocher for the selected CPU. 2303c609719bSwdenk 2304b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2305602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2306b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2307b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2308c609719bSwdenk command line interface. 2309c609719bSwdenk 2310bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2311c609719bSwdenk 2312b37c7e5eSwdenk There are several other quantities that must also be 2313ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2314c609719bSwdenk 23156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2316b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 23176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 231811ccc33fSMarcel Ziswiler the CPU's i2c node address). 2319c609719bSwdenk 23208d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2321a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 23228d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 23238d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 23248d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2325b37c7e5eSwdenk 23265da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 23275da71efaSEric Millbrandt 23285da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 23295da71efaSEric Millbrandt chips might think that the current transfer is still 23305da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 23315da71efaSEric Millbrandt commands until the slave device responds. 23325da71efaSEric Millbrandt 2333b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2334b37c7e5eSwdenk 2335ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2336b37c7e5eSwdenk then the following macros need to be defined (examples are 2337b37c7e5eSwdenk from include/configs/lwmon.h): 2338c609719bSwdenk 2339c609719bSwdenk I2C_INIT 2340c609719bSwdenk 2341b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2342c609719bSwdenk controller or configure ports. 2343c609719bSwdenk 2344b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2345b37c7e5eSwdenk 2346c609719bSwdenk I2C_PORT 2347c609719bSwdenk 2348c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2349c609719bSwdenk assumes both bits are on the same port). Valid values 2350c609719bSwdenk are 0..3 for ports A..D. 2351c609719bSwdenk 2352c609719bSwdenk I2C_ACTIVE 2353c609719bSwdenk 2354c609719bSwdenk The code necessary to make the I2C data line active 2355c609719bSwdenk (driven). If the data line is open collector, this 2356c609719bSwdenk define can be null. 2357c609719bSwdenk 2358b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2359b37c7e5eSwdenk 2360c609719bSwdenk I2C_TRISTATE 2361c609719bSwdenk 2362c609719bSwdenk The code necessary to make the I2C data line tri-stated 2363c609719bSwdenk (inactive). If the data line is open collector, this 2364c609719bSwdenk define can be null. 2365c609719bSwdenk 2366b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2367b37c7e5eSwdenk 2368c609719bSwdenk I2C_READ 2369c609719bSwdenk 2370472d5460SYork Sun Code that returns true if the I2C data line is high, 2371472d5460SYork Sun false if it is low. 2372c609719bSwdenk 2373b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2374b37c7e5eSwdenk 2375c609719bSwdenk I2C_SDA(bit) 2376c609719bSwdenk 2377472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2378472d5460SYork Sun is false, it clears it (low). 2379c609719bSwdenk 2380b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2381b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2382b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2383b37c7e5eSwdenk 2384c609719bSwdenk I2C_SCL(bit) 2385c609719bSwdenk 2386472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2387472d5460SYork Sun is false, it clears it (low). 2388c609719bSwdenk 2389b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2390b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2391b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2392b37c7e5eSwdenk 2393c609719bSwdenk I2C_DELAY 2394c609719bSwdenk 2395c609719bSwdenk This delay is invoked four times per clock cycle so this 2396c609719bSwdenk controls the rate of data transfer. The data rate thus 2397b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2398b37c7e5eSwdenk like: 2399b37c7e5eSwdenk 2400b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2401c609719bSwdenk 2402793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2403793b5726SMike Frysinger 2404793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2405793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2406793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2407793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2408793b5726SMike Frysinger 2409793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2410793b5726SMike Frysinger the generic GPIO functions. 2411793b5726SMike Frysinger 24126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 241347cd00faSwdenk 241447cd00faSwdenk When a board is reset during an i2c bus transfer 241547cd00faSwdenk chips might think that the current transfer is still 241647cd00faSwdenk in progress. On some boards it is possible to access 241747cd00faSwdenk the i2c SCLK line directly, either by using the 241847cd00faSwdenk processor pin as a GPIO or by having a second pin 241947cd00faSwdenk connected to the bus. If this option is defined a 242047cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 242147cd00faSwdenk is run early in the boot sequence. 242247cd00faSwdenk 242326a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 242426a33504SRichard Retanubun 242526a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 242626a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 242726a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 242826a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 242926a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 243026a33504SRichard Retanubun controller provide such a method. It is called at the end of 243126a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 243226a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 243326a33504SRichard Retanubun 243417ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 243517ea1177Swdenk 243617ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 243717ea1177Swdenk in u-boot bd_info structure based on u-boot environment 243817ea1177Swdenk variable "i2cfast". (see also i2cfast) 243917ea1177Swdenk 2440bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2441bb99ad6dSBen Warren 2442bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2443bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2444bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2445bb99ad6dSBen Warren Note that bus numbering is zero-based. 2446bb99ad6dSBen Warren 24476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2448bb99ad6dSBen Warren 2449bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 24500f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 24510f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 24520f89c54bSPeter Tyser a 1D array of device addresses 2453bb99ad6dSBen Warren 2454bb99ad6dSBen Warren e.g. 2455bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 24566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2457bb99ad6dSBen Warren 2458bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2459bb99ad6dSBen Warren 2460bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 24616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2462bb99ad6dSBen Warren 2463bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2464bb99ad6dSBen Warren 24656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2466be5e6181STimur Tabi 2467be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2468be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2469be5e6181STimur Tabi 24706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 24710dc018ecSStefan Roese 24720dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 24730dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 24740dc018ecSStefan Roese 24756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 24760dc018ecSStefan Roese 24770dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 24780dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 24790dc018ecSStefan Roese 24806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 24819ebbb54fSVictor Gallardo 24829ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 24839ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 24849ebbb54fSVictor Gallardo specified DTT device. 24859ebbb54fSVictor Gallardo 24862ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 24872ac6985aSAndrew Dyer 24882ac6985aSAndrew Dyer defining this will force the i2c_read() function in 24892ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 24902ac6985aSAndrew Dyer between writing the address pointer and reading the 24912ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 24922ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 24932ac6985aSAndrew Dyer devices can use either method, but some require one or 24942ac6985aSAndrew Dyer the other. 2495be5e6181STimur Tabi 2496c609719bSwdenk- SPI Support: CONFIG_SPI 2497c609719bSwdenk 2498c609719bSwdenk Enables SPI driver (so far only tested with 2499c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2500c609719bSwdenk D/As on the SACSng board) 2501c609719bSwdenk 25026639562eSYoshihiro Shimoda CONFIG_SH_SPI 25036639562eSYoshihiro Shimoda 25046639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 25056639562eSYoshihiro Shimoda only SH7757 is supported. 25066639562eSYoshihiro Shimoda 2507c609719bSwdenk CONFIG_SPI_X 2508c609719bSwdenk 2509c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2510c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2511c609719bSwdenk 2512c609719bSwdenk CONFIG_SOFT_SPI 2513c609719bSwdenk 2514c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2515c609719bSwdenk using hardware support. This is a general purpose 2516c609719bSwdenk driver that only requires three general I/O port pins 2517c609719bSwdenk (two outputs, one input) to function. If this is 2518c609719bSwdenk defined, the board configuration must define several 2519c609719bSwdenk SPI configuration items (port pins to use, etc). For 2520c609719bSwdenk an example, see include/configs/sacsng.h. 2521c609719bSwdenk 252204a9e118SBen Warren CONFIG_HARD_SPI 252304a9e118SBen Warren 252404a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 252504a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 252604a9e118SBen Warren must define a list of chip-select function pointers. 252704a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 252804a9e118SBen Warren example, see include/configs/mpc8349emds.h. 252904a9e118SBen Warren 253038254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 253138254f45SGuennadi Liakhovetski 253238254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 25332e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 253438254f45SGuennadi Liakhovetski 25350133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 25360133502eSMatthias Fuchs 25370133502eSMatthias Fuchs Enables FPGA subsystem. 25380133502eSMatthias Fuchs 25390133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 25400133502eSMatthias Fuchs 25410133502eSMatthias Fuchs Enables support for specific chip vendors. 25420133502eSMatthias Fuchs (ALTERA, XILINX) 25430133502eSMatthias Fuchs 25440133502eSMatthias Fuchs CONFIG_FPGA_<family> 25450133502eSMatthias Fuchs 25460133502eSMatthias Fuchs Enables support for FPGA family. 25470133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 25480133502eSMatthias Fuchs 25490133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2550c609719bSwdenk 2551c609719bSwdenk Specify the number of FPGA devices to support. 2552c609719bSwdenk 255364e809afSSiva Durga Prasad Paladugu CONFIG_CMD_FPGA_LOADMK 255464e809afSSiva Durga Prasad Paladugu 255564e809afSSiva Durga Prasad Paladugu Enable support for fpga loadmk command 255664e809afSSiva Durga Prasad Paladugu 2557*67193864SMichal Simek CONFIG_CMD_FPGA_LOADP 2558*67193864SMichal Simek 2559*67193864SMichal Simek Enable support for fpga loadp command - load partial bitstream 2560*67193864SMichal Simek 2561*67193864SMichal Simek CONFIG_CMD_FPGA_LOADBP 2562*67193864SMichal Simek 2563*67193864SMichal Simek Enable support for fpga loadbp command - load partial bitstream 2564*67193864SMichal Simek (Xilinx only) 2565*67193864SMichal Simek 25666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2567c609719bSwdenk 2568c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2569c609719bSwdenk 25706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2571c609719bSwdenk 2572c609719bSwdenk Enable checks on FPGA configuration interface busy 2573c609719bSwdenk status by the configuration function. This option 2574c609719bSwdenk will require a board or device specific function to 2575c609719bSwdenk be written. 2576c609719bSwdenk 2577c609719bSwdenk CONFIG_FPGA_DELAY 2578c609719bSwdenk 2579c609719bSwdenk If defined, a function that provides delays in the FPGA 2580c609719bSwdenk configuration driver. 2581c609719bSwdenk 25826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2583c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2584c609719bSwdenk 25856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2586c609719bSwdenk 2587c609719bSwdenk Check for configuration errors during FPGA bitfile 2588c609719bSwdenk loading. For example, abort during Virtex II 2589c609719bSwdenk configuration if the INIT_B line goes low (which 2590c609719bSwdenk indicated a CRC error). 2591c609719bSwdenk 25926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2593c609719bSwdenk 2594c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2595c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2596c609719bSwdenk FPGA configuration sequence. The default time is 500 259711ccc33fSMarcel Ziswiler ms. 2598c609719bSwdenk 25996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2600c609719bSwdenk 2601c609719bSwdenk Maximum time to wait for BUSY to deassert during 260211ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2603c609719bSwdenk 26046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2605c609719bSwdenk 2606c609719bSwdenk Time to wait after FPGA configuration. The default is 260711ccc33fSMarcel Ziswiler 200 ms. 2608c609719bSwdenk 2609c609719bSwdenk- Configuration Management: 2610c609719bSwdenk CONFIG_IDENT_STRING 2611c609719bSwdenk 2612c609719bSwdenk If defined, this string will be added to the U-Boot 2613c609719bSwdenk version information (U_BOOT_VERSION) 2614c609719bSwdenk 2615c609719bSwdenk- Vendor Parameter Protection: 2616c609719bSwdenk 2617c609719bSwdenk U-Boot considers the values of the environment 2618c609719bSwdenk variables "serial#" (Board Serial Number) and 26197152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2620c609719bSwdenk are set once by the board vendor / manufacturer, and 2621c609719bSwdenk protects these variables from casual modification by 2622c609719bSwdenk the user. Once set, these variables are read-only, 2623c609719bSwdenk and write or delete attempts are rejected. You can 262411ccc33fSMarcel Ziswiler change this behaviour: 2625c609719bSwdenk 2626c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2627c609719bSwdenk file, the write protection for vendor parameters is 262847cd00faSwdenk completely disabled. Anybody can change or delete 2629c609719bSwdenk these parameters. 2630c609719bSwdenk 2631c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2632c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 263311ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2634c609719bSwdenk which can be changed exactly ONCE by the user. [The 2635c609719bSwdenk serial# is unaffected by this, i. e. it remains 2636c609719bSwdenk read-only.] 2637c609719bSwdenk 26382598090bSJoe Hershberger The same can be accomplished in a more flexible way 26392598090bSJoe Hershberger for any variable by configuring the type of access 26402598090bSJoe Hershberger to allow for those variables in the ".flags" variable 26412598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 26422598090bSJoe Hershberger 2643c609719bSwdenk- Protected RAM: 2644c609719bSwdenk CONFIG_PRAM 2645c609719bSwdenk 2646c609719bSwdenk Define this variable to enable the reservation of 2647c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2648c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2649c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2650c609719bSwdenk this default value by defining an environment 2651c609719bSwdenk variable "pram" to the number of kB you want to 2652c609719bSwdenk reserve. Note that the board info structure will 2653c609719bSwdenk still show the full amount of RAM. If pRAM is 2654c609719bSwdenk reserved, a new environment variable "mem" will 2655c609719bSwdenk automatically be defined to hold the amount of 2656c609719bSwdenk remaining RAM in a form that can be passed as boot 2657c609719bSwdenk argument to Linux, for instance like that: 2658c609719bSwdenk 2659fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2660c609719bSwdenk saveenv 2661c609719bSwdenk 2662c609719bSwdenk This way you can tell Linux not to use this memory, 2663c609719bSwdenk either, which results in a memory region that will 2664c609719bSwdenk not be affected by reboots. 2665c609719bSwdenk 2666c609719bSwdenk *WARNING* If your board configuration uses automatic 2667c609719bSwdenk detection of the RAM size, you must make sure that 2668c609719bSwdenk this memory test is non-destructive. So far, the 2669c609719bSwdenk following board configurations are known to be 2670c609719bSwdenk "pRAM-clean": 2671c609719bSwdenk 26721b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 26731b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2674544d97e9SWolfgang Denk FLAGADM, TQM8260 2675c609719bSwdenk 267640fef049SGabe Black- Access to physical memory region (> 4GB) 267740fef049SGabe Black Some basic support is provided for operations on memory not 267840fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 267940fef049SGabe Black support access to more than 4GB of memory on 32-bit 268040fef049SGabe Black machines using physical address extension or similar. 268140fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 268240fef049SGabe Black currently only supports clearing the memory. 268340fef049SGabe Black 2684c609719bSwdenk- Error Recovery: 2685c609719bSwdenk CONFIG_PANIC_HANG 2686c609719bSwdenk 2687c609719bSwdenk Define this variable to stop the system in case of a 2688c609719bSwdenk fatal error, so that you have to reset it manually. 2689c609719bSwdenk This is probably NOT a good idea for an embedded 269011ccc33fSMarcel Ziswiler system where you want the system to reboot 2691c609719bSwdenk automatically as fast as possible, but it may be 2692c609719bSwdenk useful during development since you can try to debug 2693c609719bSwdenk the conditions that lead to the situation. 2694c609719bSwdenk 2695c609719bSwdenk CONFIG_NET_RETRY_COUNT 2696c609719bSwdenk 2697c609719bSwdenk This variable defines the number of retries for 2698c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2699c609719bSwdenk before giving up the operation. If not defined, a 2700c609719bSwdenk default value of 5 is used. 2701c609719bSwdenk 270240cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 270340cb90eeSGuennadi Liakhovetski 270440cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 270540cb90eeSGuennadi Liakhovetski 270648a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 270748a3e999STetsuyuki Kobayashi 270848a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 270948a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 271048a3e999STetsuyuki Kobayashi try longer timeout such as 271148a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 271248a3e999STetsuyuki Kobayashi 2713c609719bSwdenk- Command Interpreter: 27148078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 271504a85b3bSwdenk 271604a85b3bSwdenk Enable auto completion of commands using TAB. 271704a85b3bSwdenk 27188078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 27198078f1a5SWolfgang Denk for the "hush" shell. 27208078f1a5SWolfgang Denk 27218078f1a5SWolfgang Denk 27226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2723c609719bSwdenk 2724c609719bSwdenk Define this variable to enable the "hush" shell (from 2725c609719bSwdenk Busybox) as command line interpreter, thus enabling 2726c609719bSwdenk powerful command line syntax like 2727c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2728c609719bSwdenk constructs ("shell scripts"). 2729c609719bSwdenk 2730c609719bSwdenk If undefined, you get the old, much simpler behaviour 2731c609719bSwdenk with a somewhat smaller memory footprint. 2732c609719bSwdenk 2733c609719bSwdenk 27346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2735c609719bSwdenk 2736c609719bSwdenk This defines the secondary prompt string, which is 2737c609719bSwdenk printed when the command interpreter needs more input 2738c609719bSwdenk to complete a command. Usually "> ". 2739c609719bSwdenk 2740c609719bSwdenk Note: 2741c609719bSwdenk 2742c609719bSwdenk In the current implementation, the local variables 2743c609719bSwdenk space and global environment variables space are 2744c609719bSwdenk separated. Local variables are those you define by 27453b57fe0aSwdenk simply typing `name=value'. To access a local 2746c609719bSwdenk variable later on, you have write `$name' or 27473b57fe0aSwdenk `${name}'; to execute the contents of a variable 27483b57fe0aSwdenk directly type `$name' at the command prompt. 2749c609719bSwdenk 2750c609719bSwdenk Global environment variables are those you use 2751c609719bSwdenk setenv/printenv to work with. To run a command stored 2752c609719bSwdenk in such a variable, you need to use the run command, 2753c609719bSwdenk and you must not use the '$' sign to access them. 2754c609719bSwdenk 2755c609719bSwdenk To store commands and special characters in a 2756c609719bSwdenk variable, please use double quotation marks 2757c609719bSwdenk surrounding the whole text of the variable, instead 2758c609719bSwdenk of the backslashes before semicolons and special 2759c609719bSwdenk symbols. 2760c609719bSwdenk 2761aa0c71acSWolfgang Denk- Commandline Editing and History: 2762aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2763aa0c71acSWolfgang Denk 276411ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2765aa0c71acSWolfgang Denk commandline input operations 2766aa0c71acSWolfgang Denk 2767a8c7c708Swdenk- Default Environment: 2768c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2769c609719bSwdenk 2770c609719bSwdenk Define this to contain any number of null terminated 2771c609719bSwdenk strings (variable = value pairs) that will be part of 27727152b1d0Swdenk the default environment compiled into the boot image. 27732262cfeeSwdenk 2774c609719bSwdenk For example, place something like this in your 2775c609719bSwdenk board's config file: 2776c609719bSwdenk 2777c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2778c609719bSwdenk "myvar1=value1\0" \ 2779c609719bSwdenk "myvar2=value2\0" 2780c609719bSwdenk 2781c609719bSwdenk Warning: This method is based on knowledge about the 2782c609719bSwdenk internal format how the environment is stored by the 27832262cfeeSwdenk U-Boot code. This is NOT an official, exported 2784c609719bSwdenk interface! Although it is unlikely that this format 27857152b1d0Swdenk will change soon, there is no guarantee either. 2786c609719bSwdenk You better know what you are doing here. 2787c609719bSwdenk 2788c609719bSwdenk Note: overly (ab)use of the default environment is 2789c609719bSwdenk discouraged. Make sure to check other ways to preset 279074de7aefSWolfgang Denk the environment like the "source" command or the 2791c609719bSwdenk boot command first. 2792c609719bSwdenk 27935e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 27945e724ca2SStephen Warren 27955e724ca2SStephen Warren Define this in order to add variables describing the 27965e724ca2SStephen Warren U-Boot build configuration to the default environment. 27975e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 27985e724ca2SStephen Warren 27995e724ca2SStephen Warren Enabling this option will cause the following to be defined: 28005e724ca2SStephen Warren 28015e724ca2SStephen Warren - CONFIG_SYS_ARCH 28025e724ca2SStephen Warren - CONFIG_SYS_CPU 28035e724ca2SStephen Warren - CONFIG_SYS_BOARD 28045e724ca2SStephen Warren - CONFIG_SYS_VENDOR 28055e724ca2SStephen Warren - CONFIG_SYS_SOC 28065e724ca2SStephen Warren 28077e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 28087e27f89fSTom Rini 28097e27f89fSTom Rini Define this in order to add variables describing certain 28107e27f89fSTom Rini run-time determined information about the hardware to the 28117e27f89fSTom Rini environment. These will be named board_name, board_rev. 28127e27f89fSTom Rini 281306fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 281406fd8538SSimon Glass 281506fd8538SSimon Glass Normally the environment is loaded when the board is 281606fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 281706fd8538SSimon Glass that so that the environment is not available until 281806fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 281906fd8538SSimon Glass this is instead controlled by the value of 282006fd8538SSimon Glass /config/load-environment. 282106fd8538SSimon Glass 2822a8c7c708Swdenk- DataFlash Support: 28232abbe075Swdenk CONFIG_HAS_DATAFLASH 28242abbe075Swdenk 28252abbe075Swdenk Defining this option enables DataFlash features and 28262abbe075Swdenk allows to read/write in Dataflash via the standard 28272abbe075Swdenk commands cp, md... 28282abbe075Swdenk 2829f61ec45eSEric Nelson- Serial Flash support 2830f61ec45eSEric Nelson CONFIG_CMD_SF 2831f61ec45eSEric Nelson 2832f61ec45eSEric Nelson Defining this option enables SPI flash commands 2833f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2834f61ec45eSEric Nelson 2835f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2836f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2837f61ec45eSEric Nelson commands. 2838f61ec45eSEric Nelson 2839f61ec45eSEric Nelson The following defaults may be provided by the platform 2840f61ec45eSEric Nelson to handle the common case when only a single serial 2841f61ec45eSEric Nelson flash is present on the system. 2842f61ec45eSEric Nelson 2843f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2844f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2845f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2846f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2847f61ec45eSEric Nelson 284824007273SSimon Glass CONFIG_CMD_SF_TEST 284924007273SSimon Glass 285024007273SSimon Glass Define this option to include a destructive SPI flash 285124007273SSimon Glass test ('sf test'). 285224007273SSimon Glass 28531dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 28541dcd6d03SJagannadha Sutradharudu Teki 28551dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 28561dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 28571dcd6d03SJagannadha Sutradharudu Teki 2858b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2859b902e07cSJagannadha Sutradharudu Teki 2860b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2861b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2862b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2863b902e07cSJagannadha Sutradharudu Teki 28643f85ce27Swdenk- SystemACE Support: 28653f85ce27Swdenk CONFIG_SYSTEMACE 28663f85ce27Swdenk 28673f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 28683f85ce27Swdenk chips attached via some sort of local bus. The address 286911ccc33fSMarcel Ziswiler of the chip must also be defined in the 28706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 28713f85ce27Swdenk 28723f85ce27Swdenk #define CONFIG_SYSTEMACE 28736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 28743f85ce27Swdenk 28753f85ce27Swdenk When SystemACE support is added, the "ace" device type 28763f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 28773f85ce27Swdenk 2878ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2879ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2880ecb0ccd9SWolfgang Denk 288128cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2882ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 288328cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2884ecb0ccd9SWolfgang Denk number generator is used. 2885ecb0ccd9SWolfgang Denk 288628cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 288728cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 288828cb9375SWolfgang Denk defined, the normal port 69 is used. 288928cb9375SWolfgang Denk 289028cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2891ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2892ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2893ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2894ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2895ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2896ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2897ecb0ccd9SWolfgang Denk 2898bf36c5d5SSimon Glass- Hashing support: 2899bf36c5d5SSimon Glass CONFIG_CMD_HASH 2900bf36c5d5SSimon Glass 2901bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2902bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2903bf36c5d5SSimon Glass 2904bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2905bf36c5d5SSimon Glass 2906bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2907bf36c5d5SSimon Glass size a little. 2908bf36c5d5SSimon Glass 2909bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2910bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2911bf36c5d5SSimon Glass 2912bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2913bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2914bf36c5d5SSimon Glass 2915a11f1873SRobert Winkler- Freescale i.MX specific commands: 2916a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2917a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2918a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2919a11f1873SRobert Winkler 2920a11f1873SRobert Winkler CONFIG_CMD_BMODE 2921a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2922a11f1873SRobert Winkler a boot from specific media. 2923a11f1873SRobert Winkler 2924a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2925a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2926a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2927a11f1873SRobert Winkler will set it back to normal. This command currently 2928a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2929a11f1873SRobert Winkler 293019c402afSSimon Glass- Signing support: 293119c402afSSimon Glass CONFIG_RSA 293219c402afSSimon Glass 293319c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 29348bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 293519c402afSSimon Glass 293619c402afSSimon Glass The signing part is build into mkimage regardless of this 293719c402afSSimon Glass option. 293819c402afSSimon Glass 29399e50c406SHeiko Schocher- bootcount support: 29409e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 29419e50c406SHeiko Schocher 29429e50c406SHeiko Schocher This enables the bootcounter support, see: 29439e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 29449e50c406SHeiko Schocher 29459e50c406SHeiko Schocher CONFIG_AT91SAM9XE 29469e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 29479e50c406SHeiko Schocher CONFIG_BLACKFIN 29489e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 29499e50c406SHeiko Schocher CONFIG_SOC_DA8XX 29509e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 29519e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 29529e50c406SHeiko Schocher enable support for the bootcounter in RAM 29539e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 29549e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 29559e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 29569e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 29579e50c406SHeiko Schocher the bootcounter. 29589e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 295919c402afSSimon Glass 2960a8c7c708Swdenk- Show boot progress: 2961c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2962c609719bSwdenk 2963c609719bSwdenk Defining this option allows to add some board- 2964c609719bSwdenk specific code (calling a user-provided function 2965c609719bSwdenk "show_boot_progress(int)") that enables you to show 2966c609719bSwdenk the system's boot progress on some display (for 2967c609719bSwdenk example, some LED's) on your board. At the moment, 2968c609719bSwdenk the following checkpoints are implemented: 2969c609719bSwdenk 29703a608ca0SSimon Glass- Detailed boot stage timing 29713a608ca0SSimon Glass CONFIG_BOOTSTAGE 29723a608ca0SSimon Glass Define this option to get detailed timing of each stage 29733a608ca0SSimon Glass of the boot process. 29743a608ca0SSimon Glass 29753a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 29763a608ca0SSimon Glass This is the number of available user bootstage records. 29773a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 29783a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 29793a608ca0SSimon Glass the limit, recording will stop. 29803a608ca0SSimon Glass 29813a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 29823a608ca0SSimon Glass Define this to print a report before boot, similar to this: 29833a608ca0SSimon Glass 29843a608ca0SSimon Glass Timer summary in microseconds: 29853a608ca0SSimon Glass Mark Elapsed Stage 29863a608ca0SSimon Glass 0 0 reset 29873a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 29883a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 29893a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 29903a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 29913a608ca0SSimon Glass 3,910,375 250,777 main_loop 29923a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 29933a608ca0SSimon Glass 30,361,327 445,160 start_kernel 29943a608ca0SSimon Glass 29952eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 29962eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 29972eba38cfSSimon Glass and un/stashing of bootstage data. 29982eba38cfSSimon Glass 299994fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 300094fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 300194fd1316SSimon Glass node is created with each bootstage id as a child. Each child 300294fd1316SSimon Glass has a 'name' property and either 'mark' containing the 300394fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 300494fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 300594fd1316SSimon Glass For example: 300694fd1316SSimon Glass 300794fd1316SSimon Glass bootstage { 300894fd1316SSimon Glass 154 { 300994fd1316SSimon Glass name = "board_init_f"; 301094fd1316SSimon Glass mark = <3575678>; 301194fd1316SSimon Glass }; 301294fd1316SSimon Glass 170 { 301394fd1316SSimon Glass name = "lcd"; 301494fd1316SSimon Glass accum = <33482>; 301594fd1316SSimon Glass }; 301694fd1316SSimon Glass }; 301794fd1316SSimon Glass 301894fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 301994fd1316SSimon Glass 30201372cce2SMarian BalakowiczLegacy uImage format: 30211372cce2SMarian Balakowicz 3022c609719bSwdenk Arg Where When 3023c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3024c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3025c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3026c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3027c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3028c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3029c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3030c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3031c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 30321372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3033c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3034c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3035c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3036c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 30371372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3038c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 30391372cce2SMarian Balakowicz 30401372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 30411372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 30421372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 30431372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 30441372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 30451372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 30461372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 304711ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 30481372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 30491372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 30501372cce2SMarian Balakowicz 3051ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3052c609719bSwdenk 3053a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 305463e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 305563e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 305663e73c9aSwdenk 3057566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3058566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3059566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3060566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3061566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3062566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3063566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3064566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3065566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3066566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3067566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3068566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3069566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3070566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3071566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3072566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3073566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3074566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3075566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3076566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3077566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3078566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3079566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3080566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3081566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3082566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3083566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3084566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3085566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3086566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3087566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3088566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3089566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3090566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3091566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3092566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3093566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3094566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3095566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3096566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3097566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3098566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3099566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3100566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3101566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3102566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3103566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3104c609719bSwdenk 3105566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3106c609719bSwdenk 3107566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3108566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3109566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3110206c60cbSwdenk 3111566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3112566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 311311ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3114566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3115566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3116566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 311774de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 311874de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3119566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3120c609719bSwdenk 31211372cce2SMarian BalakowiczFIT uImage format: 31221372cce2SMarian Balakowicz 31231372cce2SMarian Balakowicz Arg Where When 31241372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 31251372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 31261372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 31271372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 31281372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 31291372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3130f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 31311372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 31321372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 31331372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 31341372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 31351372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 313611ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 313711ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 31381372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 31391372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 31401372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 31411372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 31421372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 31431372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 31441372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 31451372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 31461372cce2SMarian Balakowicz 31471372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 31481372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 31491372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 315011ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 31511372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 31521372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 31531372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 31541372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 31551372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 31561372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 31571372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 31581372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 31591372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 31601372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 31611372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 31621372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 31631372cce2SMarian Balakowicz 316411ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 31651372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 31661372cce2SMarian Balakowicz 316711ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 31681372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 31691372cce2SMarian Balakowicz 317011ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 31711372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 31721372cce2SMarian Balakowicz 3173d95f6ec7SGabe Black- FIT image support: 3174d95f6ec7SGabe Black CONFIG_FIT 3175d95f6ec7SGabe Black Enable support for the FIT uImage format. 3176d95f6ec7SGabe Black 3177d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3178d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3179d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3180d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3181d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3182d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3183d95f6ec7SGabe Black 31843e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 31853e569a6bSSimon Glass This option enables signature verification of FIT uImages, 31863e569a6bSSimon Glass using a hash signed and verified using RSA. See 31873e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 31883e569a6bSSimon Glass 31894cf2609bSWolfgang Denk- Standalone program support: 31904cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 31914cf2609bSWolfgang Denk 31926feff899SWolfgang Denk This option defines a board specific value for the 31936feff899SWolfgang Denk address where standalone program gets loaded, thus 31946feff899SWolfgang Denk overwriting the architecture dependent default 31954cf2609bSWolfgang Denk settings. 31964cf2609bSWolfgang Denk 31974cf2609bSWolfgang Denk- Frame Buffer Address: 31984cf2609bSWolfgang Denk CONFIG_FB_ADDR 31994cf2609bSWolfgang Denk 32004cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 320144a53b57SWolfgang Denk address for frame buffer. This is typically the case 320244a53b57SWolfgang Denk when using a graphics controller has separate video 320344a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 320444a53b57SWolfgang Denk the given address instead of dynamically reserving it 320544a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 320644a53b57SWolfgang Denk the memory for the frame buffer depending on the 320744a53b57SWolfgang Denk configured panel size. 32084cf2609bSWolfgang Denk 32094cf2609bSWolfgang Denk Please see board_init_f function. 32104cf2609bSWolfgang Denk 3211cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3212cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3213cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3214cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3215cccfc2abSDetlev Zundel 3216cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3217cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3218cccfc2abSDetlev Zundel 3219cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3220cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3221cccfc2abSDetlev Zundel 3222cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3223cccfc2abSDetlev Zundel Needed for mtdparts command support. 3224cccfc2abSDetlev Zundel 3225cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3226cccfc2abSDetlev Zundel 3227cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3228cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3229cccfc2abSDetlev Zundel 323070c219cdSJoe Hershberger- UBI support 323170c219cdSJoe Hershberger CONFIG_CMD_UBI 323270c219cdSJoe Hershberger 323370c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 323470c219cdSJoe Hershberger with the UBI flash translation layer 323570c219cdSJoe Hershberger 323670c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 323770c219cdSJoe Hershberger 3238147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3239147162daSJoe Hershberger 3240147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3241147162daSJoe Hershberger warnings and errors enabled. 3242147162daSJoe Hershberger 324370c219cdSJoe Hershberger- UBIFS support 324470c219cdSJoe Hershberger CONFIG_CMD_UBIFS 324570c219cdSJoe Hershberger 324670c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 324770c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 324870c219cdSJoe Hershberger 324970c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 325070c219cdSJoe Hershberger 3251147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3252147162daSJoe Hershberger 3253147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3254147162daSJoe Hershberger warnings and errors enabled. 3255147162daSJoe Hershberger 32566a11cf48SDaniel Schwierzeck- SPL framework 32576a11cf48SDaniel Schwierzeck CONFIG_SPL 32586a11cf48SDaniel Schwierzeck Enable building of SPL globally. 32596a11cf48SDaniel Schwierzeck 326095579793STom Rini CONFIG_SPL_LDSCRIPT 326195579793STom Rini LDSCRIPT for linking the SPL binary. 326295579793STom Rini 32636ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 32646ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 32656ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 32666ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 32678960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32686ebc3461SAlbert ARIBAUD must not be both defined at the same time. 32696ebc3461SAlbert ARIBAUD 327095579793STom Rini CONFIG_SPL_MAX_SIZE 32716ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 32726ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 32736ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 32746ebc3461SAlbert ARIBAUD not exceed it. 327595579793STom Rini 32766a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 32776a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 32786a11cf48SDaniel Schwierzeck 327994a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 328094a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 328194a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 328294a45bb1SScott Wood 328395579793STom Rini CONFIG_SPL_BSS_START_ADDR 328495579793STom Rini Link address for the BSS within the SPL binary. 328595579793STom Rini 328695579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 32876ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 32886ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 32896ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 32908960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32916ebc3461SAlbert ARIBAUD must not be both defined at the same time. 329295579793STom Rini 329395579793STom Rini CONFIG_SPL_STACK 329495579793STom Rini Adress of the start of the stack SPL will use 329595579793STom Rini 329694a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 329794a45bb1SScott Wood Adress of the start of the stack SPL will use after 329894a45bb1SScott Wood relocation. If unspecified, this is equal to 329994a45bb1SScott Wood CONFIG_SPL_STACK. 330094a45bb1SScott Wood 330195579793STom Rini CONFIG_SYS_SPL_MALLOC_START 330295579793STom Rini Starting address of the malloc pool used in SPL. 330395579793STom Rini 330495579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 330595579793STom Rini The size of the malloc pool used in SPL. 33066a11cf48SDaniel Schwierzeck 330747f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 330847f7bcaeSTom Rini Enable the SPL framework under common/. This framework 330947f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 331047f7bcaeSTom Rini NAND loading of the Linux Kernel. 331147f7bcaeSTom Rini 33129607faf2STom Rini CONFIG_SPL_OS_BOOT 33139607faf2STom Rini Enable booting directly to an OS from SPL. 33149607faf2STom Rini See also: doc/README.falcon 33159607faf2STom Rini 3316861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3317861a86f4STom Rini For ARM, enable an optional function to print more information 3318861a86f4STom Rini about the running system. 3319861a86f4STom Rini 33204b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 33214b919725SScott Wood Arch init code should be built for a very small image 33224b919725SScott Wood 33236a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 33246a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 33256a11cf48SDaniel Schwierzeck 33266a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 33276a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 33286a11cf48SDaniel Schwierzeck 33296a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 33306a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 33316a11cf48SDaniel Schwierzeck 33326a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 33336a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 33346a11cf48SDaniel Schwierzeck 33356a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 33366a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 33376a11cf48SDaniel Schwierzeck 333895579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 333995579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 334095579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 334195579793STom Rini Address, size and partition on the MMC to load U-Boot from 334295579793STom Rini when the MMC is being used in raw mode. 334395579793STom Rini 33442b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 33452b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 33462b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 33472b75b0adSPeter Korsgaard 33482b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 33492b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 33502b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 33512b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 33522b75b0adSPeter Korsgaard (for falcon mode) 33532b75b0adSPeter Korsgaard 335495579793STom Rini CONFIG_SPL_FAT_SUPPORT 335595579793STom Rini Support for fs/fat/libfat.o in SPL binary 335695579793STom Rini 335795579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 335895579793STom Rini Filename to read to load U-Boot when reading from FAT 335995579793STom Rini 33607ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 33617ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 33627ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 33637ad2cc79SPeter Korsgaard 33647ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 33657ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 33667ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 33677ad2cc79SPeter Korsgaard 336806f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 336906f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 337006f60ae3SScott Wood start.S waits for the rest of the SPL to load before 337106f60ae3SScott Wood continuing (the hardware starts execution after just 337206f60ae3SScott Wood loading the first page rather than the full 4K). 337306f60ae3SScott Wood 3374651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3375651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3376651fcf60SPrabhakar Kushwaha 33776f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 33786f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 33796f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 33806f2f01b9SScott Wood 33816f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 33826f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 33836f2f01b9SScott Wood 33846f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 33856f2f01b9SScott Wood Include standard software ECC in the SPL 33866f2f01b9SScott Wood 338795579793STom Rini CONFIG_SPL_NAND_SIMPLE 33887d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 33897d4b7955SScott Wood expose the cmd_ctrl() interface. 339095579793STom Rini 33916dd3b566STom Rini CONFIG_SPL_MTD_SUPPORT 33926dd3b566STom Rini Support for the MTD subsystem within SPL. Useful for 33936dd3b566STom Rini environment on NAND support within SPL. 33946dd3b566STom Rini 3395bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3396bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 33975614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3398bb0dc108SYing Zhang 33997c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 34007c8eea59SYing Zhang Set for common ddr init with serial presence detect in 34017c8eea59SYing Zhang SPL binary. 34027c8eea59SYing Zhang 340395579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 340495579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 340595579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 340695579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 340795579793STom Rini CONFIG_SYS_NAND_ECCBYTES 340895579793STom Rini Defines the size and behavior of the NAND that SPL uses 34097d4b7955SScott Wood to read U-Boot 341095579793STom Rini 3411fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3412fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3413fbe76ae4SPrabhakar Kushwaha 341495579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 34157d4b7955SScott Wood Location in NAND to read U-Boot from 34167d4b7955SScott Wood 34177d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 34187d4b7955SScott Wood Location in memory to load U-Boot to 34197d4b7955SScott Wood 34207d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 34217d4b7955SScott Wood Size of image to load 342295579793STom Rini 342395579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 34247d4b7955SScott Wood Entry point in loaded image to jump to 342595579793STom Rini 342695579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 342795579793STom Rini Define this if you need to first read the OOB and then the 342895579793STom Rini data. This is used for example on davinci plattforms. 342995579793STom Rini 343095579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 343195579793STom Rini Support for an OMAP3-specific set of functions to return the 343295579793STom Rini ID and MFR of the first attached NAND chip, if present. 343395579793STom Rini 34346a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 34356a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 34366a11cf48SDaniel Schwierzeck 34376a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 34386a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 34396a11cf48SDaniel Schwierzeck 34406a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 34416a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 34426a11cf48SDaniel Schwierzeck 3443c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3444c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3445c57b953dSPavel Machek 34466a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 34476a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 34481372cce2SMarian Balakowicz 3449ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3450ba1bee43SYing Zhang Support for the environment operating in SPL binary 3451ba1bee43SYing Zhang 3452ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3453ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3454ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3455ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3456ba1bee43SYing Zhang 345774752baaSScott Wood CONFIG_SPL_PAD_TO 34586113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 34596113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 34606113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34616113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34626113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 346374752baaSScott Wood 3464ca2fca22SScott Wood CONFIG_SPL_TARGET 3465ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3466ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3467ca2fca22SScott Wood example if more than one image needs to be produced. 3468ca2fca22SScott Wood 346987ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 347087ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 347187ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 347287ebee39SSimon Glass option to re-enable it. This will affect the output of the 347387ebee39SSimon Glass bootm command when booting a FIT image. 347487ebee39SSimon Glass 34753aa29de0SYing Zhang- TPL framework 34763aa29de0SYing Zhang CONFIG_TPL 34773aa29de0SYing Zhang Enable building of TPL globally. 34783aa29de0SYing Zhang 34793aa29de0SYing Zhang CONFIG_TPL_PAD_TO 34803aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 34813aa29de0SYing Zhang the TPL payload. By default, this is defined as 34823aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34833aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34843aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 34853aa29de0SYing Zhang 3486c609719bSwdenkModem Support: 3487c609719bSwdenk-------------- 3488c609719bSwdenk 3489566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3490c609719bSwdenk 349111ccc33fSMarcel Ziswiler- Modem support enable: 3492c609719bSwdenk CONFIG_MODEM_SUPPORT 3493c609719bSwdenk 3494c609719bSwdenk- RTS/CTS Flow control enable: 3495c609719bSwdenk CONFIG_HWFLOW 3496c609719bSwdenk 3497c609719bSwdenk- Modem debug support: 3498c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3499c609719bSwdenk 3500c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3501c609719bSwdenk for modem support. Useful only with BDI2000. 3502c609719bSwdenk 3503a8c7c708Swdenk- Interrupt support (PPC): 3504a8c7c708Swdenk 3505a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3506a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 350711ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3508a8c7c708Swdenk should set decrementer_count to appropriate value. If 350911ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3510a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 351111ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3512a8c7c708Swdenk specific handling. If board has watchdog / status_led 3513a8c7c708Swdenk / other_activity_monitor it works automatically from 3514a8c7c708Swdenk general timer_interrupt(). 3515a8c7c708Swdenk 3516c609719bSwdenk- General: 3517c609719bSwdenk 3518c609719bSwdenk In the target system modem support is enabled when a 3519c609719bSwdenk specific key (key combination) is pressed during 3520c609719bSwdenk power-on. Otherwise U-Boot will boot normally 352111ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3522c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3523c609719bSwdenk function, returning 1 and thus enabling modem 3524c609719bSwdenk initialization. 3525c609719bSwdenk 3526c609719bSwdenk If there are no modem init strings in the 3527c609719bSwdenk environment, U-Boot proceed to autoboot; the 3528c609719bSwdenk previous output (banner, info printfs) will be 352911ccc33fSMarcel Ziswiler suppressed, though. 3530c609719bSwdenk 3531c609719bSwdenk See also: doc/README.Modem 3532c609719bSwdenk 35339660e442SHelmut RaigerBoard initialization settings: 35349660e442SHelmut Raiger------------------------------ 35359660e442SHelmut Raiger 35369660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 35379660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 35389660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 35399660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 35409660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 35419660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 35429660e442SHelmut Raiger 35439660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 35449660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 35459660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 35469660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3547c609719bSwdenk 3548c609719bSwdenkConfiguration Settings: 3549c609719bSwdenk----------------------- 3550c609719bSwdenk 35514d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 35524d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 35534d1fd7f1SYork Sun 35546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3555c609719bSwdenk undefine this when you're short of memory. 3556c609719bSwdenk 35572fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 35582fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 35592fb2604dSPeter Tyser 35606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3561c609719bSwdenk prompt for user input. 3562c609719bSwdenk 35636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3564c609719bSwdenk 35656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3566c609719bSwdenk 35676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3568c609719bSwdenk 35696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3570c609719bSwdenk the application (usually a Linux kernel) when it is 3571c609719bSwdenk booted 3572c609719bSwdenk 35736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3574c609719bSwdenk List of legal baudrate settings for this board. 3575c609719bSwdenk 35766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3577c609719bSwdenk Suppress display of console information at boot. 3578c609719bSwdenk 35796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3580c609719bSwdenk If the board specific function 3581c609719bSwdenk extern int overwrite_console (void); 3582c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3583c609719bSwdenk serial port, else the settings in the environment are used. 3584c609719bSwdenk 35856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3586c609719bSwdenk Enable the call to overwrite_console(). 3587c609719bSwdenk 35886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3589c609719bSwdenk Enable overwrite of previous console environment settings. 3590c609719bSwdenk 35916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3592c609719bSwdenk Begin and End addresses of the area used by the 3593c609719bSwdenk simple memory test. 3594c609719bSwdenk 35956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3596c609719bSwdenk Enable an alternate, more extensive memory test. 3597c609719bSwdenk 35986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 35995f535fe1Swdenk Scratch address used by the alternate memory test 36005f535fe1Swdenk You only need to set this if address zero isn't writeable 36015f535fe1Swdenk 36026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 36036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 360414f73ca6SStefan Roese this specified memory area will get subtracted from the top 360511ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 360614f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 360714f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 360814f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 36095e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 361014f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 36115e12e75dSStefan Roese will have to get fixed in Linux additionally. 361214f73ca6SStefan Roese 361314f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 361414f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 361514f73ca6SStefan Roese be touched. 361614f73ca6SStefan Roese 361714f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 361814f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 361914f73ca6SStefan Roese then the end address of the Linux memory will be located at a 362014f73ca6SStefan Roese non page size aligned address and this could cause major 362114f73ca6SStefan Roese problems. 362214f73ca6SStefan Roese 36236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3624c609719bSwdenk Enable temporary baudrate change while serial download 3625c609719bSwdenk 36266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3627c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3628c609719bSwdenk 36296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3630c609719bSwdenk Physical start address of Motherboard I/O (if using a 3631c609719bSwdenk Cogent motherboard) 3632c609719bSwdenk 36336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3634c609719bSwdenk Physical start address of Flash memory. 3635c609719bSwdenk 36366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3637c609719bSwdenk Physical start address of boot monitor code (set by 3638c609719bSwdenk make config files to be same as the text base address 363914d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 36406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3641c609719bSwdenk 36426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 36433b57fe0aSwdenk Size of memory reserved for monitor code, used to 36443b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 36453b57fe0aSwdenk embedded within the U-Boot image, or in a separate 36463b57fe0aSwdenk flash sector. 3647c609719bSwdenk 36486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3649c609719bSwdenk Size of DRAM reserved for malloc() use. 3650c609719bSwdenk 36516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 365215940c9aSStefan Roese Normally compressed uImages are limited to an 365315940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 36546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 365515940c9aSStefan Roese to adjust this setting to your needs. 3656c609719bSwdenk 36576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3658c609719bSwdenk Maximum size of memory mapped by the startup code of 3659c609719bSwdenk the Linux kernel; all data that must be processed by 36607d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 36617d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 36621bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 36637d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3664c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3665c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3666c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3667c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3668c609719bSwdenk 3669fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3670fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3671fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3672fca43cc8SJohn Rigby is enabled. 3673fca43cc8SJohn Rigby 3674fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3675fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3676fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3677fca43cc8SJohn Rigby 3678fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3679fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3680fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3681fca43cc8SJohn Rigby 36826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3683c609719bSwdenk Max number of Flash memory banks 3684c609719bSwdenk 36856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3686c609719bSwdenk Max number of sectors on a Flash chip 3687c609719bSwdenk 36886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3689c609719bSwdenk Timeout for Flash erase operations (in ms) 3690c609719bSwdenk 36916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3692c609719bSwdenk Timeout for Flash write operations (in ms) 3693c609719bSwdenk 36946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 36958564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 36968564acf9Swdenk 36976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 36988564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 36998564acf9Swdenk 37006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 37018564acf9Swdenk If defined, hardware flash sectors protection is used 37028564acf9Swdenk instead of U-Boot software protection. 37038564acf9Swdenk 37046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3705c609719bSwdenk 3706c609719bSwdenk Enable TFTP transfers directly to flash memory; 3707c609719bSwdenk without this option such a download has to be 3708c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3709c609719bSwdenk copy from RAM to flash. 3710c609719bSwdenk 3711c609719bSwdenk The two-step approach is usually more reliable, since 3712c609719bSwdenk you can check if the download worked before you erase 371311ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 371411ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3715c609719bSwdenk downloaded image) this option may be very useful. 3716c609719bSwdenk 37176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3718c609719bSwdenk Define if the flash driver uses extra elements in the 37195653fc33Swdenk common flash structure for storing flash geometry. 37205653fc33Swdenk 372100b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 37225653fc33Swdenk This option also enables the building of the cfi_flash driver 37235653fc33Swdenk in the drivers directory 372453cf9435Sstroese 372591809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 372691809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 372791809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 372891809ed5SPiotr Ziecik to the MTD layer. 372991809ed5SPiotr Ziecik 37306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 373196ef831fSGuennadi Liakhovetski Use buffered writes to flash. 373296ef831fSGuennadi Liakhovetski 373396ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 373496ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 373596ef831fSGuennadi Liakhovetski write commands. 373696ef831fSGuennadi Liakhovetski 37376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 37385568e613SStefan Roese If this option is defined, the common CFI flash doesn't 37395568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 37405568e613SStefan Roese is useful, if some of the configured banks are only 37415568e613SStefan Roese optionally available. 37425568e613SStefan Roese 37439a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 37449a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 37459a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 37469a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 37479a042e9cSJerry Van Baren 3748352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3749352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3750352ef3f1SStefan Roese against the source after the write operation. An error message 3751352ef3f1SStefan Roese will be printed when the contents are not identical. 3752352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3753352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3754352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3755352ef3f1SStefan Roese this option if you really know what you are doing. 3756352ef3f1SStefan Roese 37576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 375811ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 375911ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 376053cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 376153cf9435Sstroese buffers can be full shortly after enabling the interface 376211ccc33fSMarcel Ziswiler on high Ethernet traffic. 376353cf9435Sstroese Defaults to 4 if not defined. 3764c609719bSwdenk 3765ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3766ea882bafSWolfgang Denk 3767ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3768ea882bafSWolfgang Denk internally to store the environment settings. The default 3769ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3770ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3771ea882bafSWolfgang Denk lib/hashtable.c for details. 3772ea882bafSWolfgang Denk 37732598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 37742598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 37751bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 37762598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 37772598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 37782598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 37792598090bSJoe Hershberger 37802598090bSJoe Hershberger The format of the list is: 37812598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3782267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3783267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 37842598090bSJoe Hershberger entry = variable_name[:attributes] 37852598090bSJoe Hershberger list = entry[,list] 37862598090bSJoe Hershberger 37872598090bSJoe Hershberger The type attributes are: 37882598090bSJoe Hershberger s - String (default) 37892598090bSJoe Hershberger d - Decimal 37902598090bSJoe Hershberger x - Hexadecimal 37912598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 37922598090bSJoe Hershberger i - IP address 37932598090bSJoe Hershberger m - MAC address 37942598090bSJoe Hershberger 3795267541f7SJoe Hershberger The access attributes are: 3796267541f7SJoe Hershberger a - Any (default) 3797267541f7SJoe Hershberger r - Read-only 3798267541f7SJoe Hershberger o - Write-once 3799267541f7SJoe Hershberger c - Change-default 3800267541f7SJoe Hershberger 38012598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 38022598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 38032598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 38042598090bSJoe Hershberger 38052598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 38062598090bSJoe Hershberger Define this to a list (string) to define validation that 38072598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 38082598090bSJoe Hershberger environment variable. To override a setting in the static 38092598090bSJoe Hershberger list, simply add an entry for the same variable name to the 38102598090bSJoe Hershberger ".flags" variable. 38112598090bSJoe Hershberger 3812267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3813267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3814267541f7SJoe Hershberger access flags. 3815267541f7SJoe Hershberger 38165c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 38175c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 38185c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 38195c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 38205c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 38215c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 38225c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 38235c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 38245c1a7ea6SSimon Glass your board please report the problem and send patches! 38255c1a7ea6SSimon Glass 38260b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 38270b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 38280b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 38290b1b60c7SLokesh Vutla the value can be calulated on a given board. 3830632efa74SSimon Glass 3831c609719bSwdenkThe following definitions that deal with the placement and management 3832c609719bSwdenkof environment data (variable area); in general, we support the 3833c609719bSwdenkfollowing configurations: 3834c609719bSwdenk 3835c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3836c3eb3fe4SMike Frysinger 3837c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3838c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3839c3eb3fe4SMike Frysinger 38405a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3841c609719bSwdenk 3842c609719bSwdenk Define this if the environment is in flash memory. 3843c609719bSwdenk 3844c609719bSwdenk a) The environment occupies one whole flash sector, which is 3845c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3846c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3847c609719bSwdenk sector" type flash chips, which have several smaller 3848c609719bSwdenk sectors at the start or the end. For instance, such a 3849c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3850c609719bSwdenk such a case you would place the environment in one of the 3851c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3852c609719bSwdenk "top boot sector" type flash chips, you would put the 3853c609719bSwdenk environment in one of the last sectors, leaving a gap 3854c609719bSwdenk between U-Boot and the environment. 3855c609719bSwdenk 38560e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3857c609719bSwdenk 3858c609719bSwdenk Offset of environment data (variable area) to the 3859c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3860c609719bSwdenk type flash chips the second sector can be used: the offset 3861c609719bSwdenk for this sector is given here. 3862c609719bSwdenk 38636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3864c609719bSwdenk 38650e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3866c609719bSwdenk 3867c609719bSwdenk This is just another way to specify the start address of 3868c609719bSwdenk the flash sector containing the environment (instead of 38690e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3870c609719bSwdenk 38710e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3872c609719bSwdenk 3873c609719bSwdenk Size of the sector containing the environment. 3874c609719bSwdenk 3875c609719bSwdenk 3876c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3877c609719bSwdenk In such a case you don't want to spend a whole sector for 3878c609719bSwdenk the environment. 3879c609719bSwdenk 38800e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3881c609719bSwdenk 38825a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 38830e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3884c609719bSwdenk of this flash sector for the environment. This saves 3885c609719bSwdenk memory for the RAM copy of the environment. 3886c609719bSwdenk 3887c609719bSwdenk It may also save flash memory if you decide to use this 3888c609719bSwdenk when your environment is "embedded" within U-Boot code, 3889c609719bSwdenk since then the remainder of the flash sector could be used 3890c609719bSwdenk for U-Boot code. It should be pointed out that this is 3891c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3892c609719bSwdenk updating the environment in flash makes it always 3893c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3894c609719bSwdenk wrong before the contents has been restored from a copy in 3895c609719bSwdenk RAM, your target system will be dead. 3896c609719bSwdenk 38970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 38980e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3899c609719bSwdenk 3900c609719bSwdenk These settings describe a second storage area used to hold 390111ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 39023e38691eSwdenk a valid backup copy in case there is a power failure during 3903c609719bSwdenk a "saveenv" operation. 3904c609719bSwdenk 3905c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3906c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3907c609719bSwdenkaccordingly! 3908c609719bSwdenk 3909c609719bSwdenk 39109314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3911c609719bSwdenk 3912c609719bSwdenk Define this if you have some non-volatile memory device 3913c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3914c609719bSwdenk environment. 3915c609719bSwdenk 39160e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39170e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3918c609719bSwdenk 391911ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3920c609719bSwdenk want to use for environment. It is assumed that this memory 3921c609719bSwdenk can just be read and written to, without any special 3922c609719bSwdenk provision. 3923c609719bSwdenk 3924c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3925c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 392611ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3927c609719bSwdenkU-Boot will hang. 3928c609719bSwdenk 3929c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3930c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3931c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3932c609719bSwdenkto save the current settings. 3933c609719bSwdenk 3934c609719bSwdenk 3935bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3936c609719bSwdenk 3937c609719bSwdenk Use this if you have an EEPROM or similar serial access 3938c609719bSwdenk device and a driver for it. 3939c609719bSwdenk 39400e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39410e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3942c609719bSwdenk 3943c609719bSwdenk These two #defines specify the offset and size of the 3944c609719bSwdenk environment area within the total memory of your EEPROM. 3945c609719bSwdenk 39466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3947c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3948c609719bSwdenk The default address is zero. 3949c609719bSwdenk 39506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3951c609719bSwdenk If defined, the number of bits used to address bytes in a 3952c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3953c609719bSwdenk would require six bits. 3954c609719bSwdenk 39556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3956c609719bSwdenk If defined, the number of milliseconds to delay between 3957c609719bSwdenk page writes. The default is zero milliseconds. 3958c609719bSwdenk 39596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3960c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3961c609719bSwdenk that this is NOT the chip address length! 3962c609719bSwdenk 39636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 39645cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 39655cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 39665cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 39675cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 39685cf91d6bSwdenk byte chips. 39695cf91d6bSwdenk 39705cf91d6bSwdenk Note that we consider the length of the address field to 39715cf91d6bSwdenk still be one byte because the extra address bits are hidden 39725cf91d6bSwdenk in the chip address. 39735cf91d6bSwdenk 39746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3975c609719bSwdenk The size in bytes of the EEPROM device. 3976c609719bSwdenk 3977548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3978548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3979548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3980548738b4SHeiko Schocher 3981548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3982548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3983548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3984548738b4SHeiko Schocher EEPROM. For example: 3985548738b4SHeiko Schocher 3986ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3987548738b4SHeiko Schocher 3988548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3989548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3990c609719bSwdenk 3991057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 39925779d8d9Swdenk 39935779d8d9Swdenk Define this if you have a DataFlash memory device which you 39945779d8d9Swdenk want to use for the environment. 39955779d8d9Swdenk 39960e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39980e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 39995779d8d9Swdenk 40005779d8d9Swdenk These three #defines specify the offset and size of the 40015779d8d9Swdenk environment area within the total memory of your DataFlash placed 40025779d8d9Swdenk at the specified address. 40035779d8d9Swdenk 40040a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 40050a85a9e7SLiu Gang 40060a85a9e7SLiu Gang Define this if you have a remote memory space which you 40070a85a9e7SLiu Gang want to use for the local device's environment. 40080a85a9e7SLiu Gang 40090a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 40100a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 40110a85a9e7SLiu Gang 40120a85a9e7SLiu Gang These two #defines specify the address and size of the 40130a85a9e7SLiu Gang environment area within the remote memory space. The 40140a85a9e7SLiu Gang local device can get the environment from remote memory 4015fc54c7faSLiu Gang space by SRIO or PCIE links. 40160a85a9e7SLiu Gang 40170a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 40180a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 4019fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4020fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 40210a85a9e7SLiu Gang 402251bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 402313a5695bSwdenk 402413a5695bSwdenk Define this if you have a NAND device which you want to use 402513a5695bSwdenk for the environment. 402613a5695bSwdenk 40270e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 40280e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 402913a5695bSwdenk 403013a5695bSwdenk These two #defines specify the offset and size of the environment 4031fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4032fdd813deSScott Wood aligned to an erase block boundary. 40335779d8d9Swdenk 4034fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4035e443c944SMarkus Klotzbuecher 40360e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4037fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4038fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4039fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4040fdd813deSScott Wood aligned to an erase block boundary. 4041e443c944SMarkus Klotzbuecher 4042fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4043fdd813deSScott Wood 4044fdd813deSScott Wood Specifies the length of the region in which the environment 4045fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4046fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4047fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4048fdd813deSScott Wood the range to be avoided. 4049fdd813deSScott Wood 4050fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4051fdd813deSScott Wood 4052fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4053fdd813deSScott Wood environment from block zero's out-of-band data. The 4054fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4055fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4056fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4057e443c944SMarkus Klotzbuecher 4058b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4059b74ab737SGuennadi Liakhovetski 4060b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4061b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4062b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4063b74ab737SGuennadi Liakhovetski 40642b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 40652b74433fSJoe Hershberger 40662b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 40672b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 40682b74433fSJoe Hershberger accesses, which is important on NAND. 40692b74433fSJoe Hershberger 40702b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 40712b74433fSJoe Hershberger 40722b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 40732b74433fSJoe Hershberger 40742b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 40752b74433fSJoe Hershberger 40762b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 40772b74433fSJoe Hershberger environment in. 40782b74433fSJoe Hershberger 4079785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4080785881f7SJoe Hershberger 4081785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4082785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4083785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4084785881f7SJoe Hershberger 40852b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 40862b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 40872b74433fSJoe Hershberger 40882b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 40892b74433fSJoe Hershberger when storing the env in UBI. 40902b74433fSJoe Hershberger 409106e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 409206e4ae5fSStephen Warren 409306e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 409406e4ae5fSStephen Warren environment. 409506e4ae5fSStephen Warren 409606e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 409706e4ae5fSStephen Warren 409806e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 409906e4ae5fSStephen Warren 410006e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 410106e4ae5fSStephen Warren 410206e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 410306e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 410406e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 410506e4ae5fSStephen Warren 410606e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 410706e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 410806e4ae5fSStephen Warren 410906e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 411006e4ae5fSStephen Warren area within the specified MMC device. 411106e4ae5fSStephen Warren 41125c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 41135c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 41145c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 41155c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 41165c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 41175c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 41185c088ee8SStephen Warren maximum possible space before it, to store other data. 41195c088ee8SStephen Warren 412006e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 412106e4ae5fSStephen Warren MMC sector boundary. 412206e4ae5fSStephen Warren 412306e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 412406e4ae5fSStephen Warren 412506e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 412606e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 412706e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 412806e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 412906e4ae5fSStephen Warren 41305c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 41315c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 41325c088ee8SStephen Warren 413306e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 413406e4ae5fSStephen Warren an MMC sector boundary. 413506e4ae5fSStephen Warren 413606e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 413706e4ae5fSStephen Warren 413806e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 413906e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 414006e4ae5fSStephen Warren CONFIG_ENV_SIZE. 414106e4ae5fSStephen Warren 41426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4143c609719bSwdenk 4144c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4145c609719bSwdenk area is used at an early stage (ROM part) if the environment 4146c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4147c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4148c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4149c609719bSwdenk to be a good choice since it makes it far enough from the 4150c609719bSwdenk start of the data area as well as from the stack pointer. 4151c609719bSwdenk 4152e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4153c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4154cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4155c609719bSwdenkuntil then to read environment variables. 4156c609719bSwdenk 415785ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 415885ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 415985ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 416085ec0bccSwdenknecessary, because the first environment variable we need is the 416185ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 416285ec0bccSwdenkhave any device yet where we could complain.] 4163c609719bSwdenk 4164c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4165c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 416685ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4167c609719bSwdenk 41686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4169fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4170fc3e2165Swdenk 41716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4172fc3e2165Swdenk also needs to be defined. 4173fc3e2165Swdenk 41746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4175fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4176c609719bSwdenk 4177f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4178f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4179f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4180f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4181f5675aa5SRon Madrid space for already greatly restricted images, including but not 4182f5675aa5SRon Madrid limited to NAND_SPL configurations. 4183f5675aa5SRon Madrid 4184b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4185b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4186b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4187b2b92f53SSimon Glass to do this. 4188b2b92f53SSimon Glass 4189e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4190e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4191e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4192e2e3e2b1SSimon Glass present. 4193e2e3e2b1SSimon Glass 4194c609719bSwdenkLow Level (hardware related) configuration options: 4195dc7c9a1aSwdenk--------------------------------------------------- 4196c609719bSwdenk 41976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4198c609719bSwdenk Cache Line Size of the CPU. 4199c609719bSwdenk 42006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4201c609719bSwdenk Default address of the IMMR after system reset. 42022535d602Swdenk 42032535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 42042535d602Swdenk and RPXsuper) to be able to adjust the position of 42052535d602Swdenk the IMMR register after a reset. 4206c609719bSwdenk 4207e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4208e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4209e46fedfeSTimur Tabi PowerPC SOCs. 4210e46fedfeSTimur Tabi 4211e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4212e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4213e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4214e46fedfeSTimur Tabi 4215e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4216e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4217e46fedfeSTimur Tabi 4218e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4219e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4220e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4221e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4222e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4223e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4224e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4225e46fedfeSTimur Tabi 4226e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4227e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4228e46fedfeSTimur Tabi 4229e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4230e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4231e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4232e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4233e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4234e46fedfeSTimur Tabi 4235e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4236e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4237e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4238e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4239e46fedfeSTimur Tabi 4240e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4241e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4242e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4243e46fedfeSTimur Tabi 42447f6c2cbcSwdenk- Floppy Disk Support: 42456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 42467f6c2cbcSwdenk 42477f6c2cbcSwdenk the default drive number (default value 0) 42487f6c2cbcSwdenk 42496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 42507f6c2cbcSwdenk 425111ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 42527f6c2cbcSwdenk (default value 1) 42537f6c2cbcSwdenk 42546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 42557f6c2cbcSwdenk 42567f6c2cbcSwdenk defines the offset of register from address. It 42577f6c2cbcSwdenk depends on which part of the data bus is connected to 425811ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 42597f6c2cbcSwdenk 42606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 42616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 42627f6c2cbcSwdenk default value. 42637f6c2cbcSwdenk 42646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 42657f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 42667f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 42677f6c2cbcSwdenk source code. It is used to make hardware dependant 42687f6c2cbcSwdenk initializations. 42697f6c2cbcSwdenk 42700abddf82SMacpaul Lin- CONFIG_IDE_AHB: 42710abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 42720abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 42730abddf82SMacpaul Lin When software is doing ATA command and data transfer to 42740abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 42750abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 42760abddf82SMacpaul Lin is requierd. 42770abddf82SMacpaul Lin 42786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 427925d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 428025d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4281c609719bSwdenk 42826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4283c609719bSwdenk 42847152b1d0Swdenk Start address of memory area that can be used for 4285c609719bSwdenk initial data and stack; please note that this must be 4286c609719bSwdenk writable memory that is working WITHOUT special 4287c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4288c609719bSwdenk will become available only after programming the 4289c609719bSwdenk memory controller and running certain initialization 4290c609719bSwdenk sequences. 4291c609719bSwdenk 4292c609719bSwdenk U-Boot uses the following memory types: 4293c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4294c609719bSwdenk - MPC824X: data cache 4295c609719bSwdenk - PPC4xx: data cache 4296c609719bSwdenk 42976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4298c609719bSwdenk 4299c609719bSwdenk Offset of the initial data structure in the memory 43006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 43016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4302c609719bSwdenk data is located at the end of the available space 4303553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 43046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 43056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 43066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4307c609719bSwdenk 4308c609719bSwdenk Note: 4309c609719bSwdenk On the MPC824X (or other systems that use the data 4310c609719bSwdenk cache for initial memory) the address chosen for 43116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4312c609719bSwdenk point to an otherwise UNUSED address space between 4313c609719bSwdenk the top of RAM and the start of the PCI space. 4314c609719bSwdenk 43156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4316c609719bSwdenk 43176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4318c609719bSwdenk 43196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4320c609719bSwdenk 43216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4322c609719bSwdenk 43236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4324c609719bSwdenk 43256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4326c609719bSwdenk 43276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4328c609719bSwdenk SDRAM timing 4329c609719bSwdenk 43306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4331c609719bSwdenk periodic timer for refresh 4332c609719bSwdenk 43336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4334c609719bSwdenk 43356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 43366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 43376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 43386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4339c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4340c609719bSwdenk 4341c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 43426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 43436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4344c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4345c609719bSwdenk 43466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 43476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4348c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4349c609719bSwdenk Prescaler definitions (SDRAM timing) 4350c609719bSwdenk 43516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4352c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4353c609719bSwdenk define relocation offset in DPRAM [DSP2] 4354c609719bSwdenk 43556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4356b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4357b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4358b423d055SHeiko Schocher 43596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4360c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4361c609719bSwdenk define relocation offset in DPRAM [SCC4] 4362c609719bSwdenk 43636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4364c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4365c609719bSwdenk wrong setting might damage your board. Read 4366c609719bSwdenk doc/README.MBX before setting this variable! 4367c609719bSwdenk 43686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4369ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4370ea909b76Swdenk (Power On Self Tests). This definition overrides 4371ea909b76Swdenk #define'd default value in commproc.h resp. 4372ea909b76Swdenk cpm_8260.h. 4373ea909b76Swdenk 43746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 43756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 43766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 43776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 43786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 43796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 43806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 43816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4382a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 43835d232d0eSwdenk 43849cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 43859cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 43869cacf4fcSDirk Eibach required. 43879cacf4fcSDirk Eibach 438869fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 438969fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 439069fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 439169fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 439269fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 439369fd2d3bSAndrew Sharp by coreboot or similar. 439469fd2d3bSAndrew Sharp 4395842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4396842033e6SGabor Juhos Enable support for indirect PCI bridges. 4397842033e6SGabor Juhos 4398a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4399a09b9b68SKumar Gala Chip has SRIO or not 4400a09b9b68SKumar Gala 4401a09b9b68SKumar Gala- CONFIG_SRIO1: 4402a09b9b68SKumar Gala Board has SRIO 1 port available 4403a09b9b68SKumar Gala 4404a09b9b68SKumar Gala- CONFIG_SRIO2: 4405a09b9b68SKumar Gala Board has SRIO 2 port available 4406a09b9b68SKumar Gala 4407c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4408c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4409c8b28152SLiu Gang 4410a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4411a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4412a09b9b68SKumar Gala 4413a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4414a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4415a09b9b68SKumar Gala 4416a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4417a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4418a09b9b68SKumar Gala 441966bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 442066bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 442166bd1846SFabio Estevam a 16 bit bus. 442266bd1846SFabio Estevam Not all NAND drivers use this symbol. 4423a430e916SFabio Estevam Example of drivers that use it: 442466bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4425a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4426eced4626SAlex Waterman 4427eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4428eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4429eced4626SAlex Waterman a default value will be used. 4430eced4626SAlex Waterman 4431bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4432218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4433218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4434218ca724SWolfgang Denk 4435bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4436bb99ad6dSBen Warren I2C address of the SPD EEPROM 4437bb99ad6dSBen Warren 44386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4439218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4440218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4441218ca724SWolfgang Denk to something your driver can deal with. 4442bb99ad6dSBen Warren 44431b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 44441b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 44451b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 44461b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 44471b3e3c4fSYork Sun header files or board specific files. 44481b3e3c4fSYork Sun 44496f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 44506f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 44516f5e1dc5SYork Sun 44526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4453218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4454218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 44552ad6b513STimur Tabi 4456c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4457c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4458c26e454dSwdenk 4459c26e454dSwdenk- CONFIG_FEC[12]_PHY 4460c26e454dSwdenk Define to the hardcoded PHY address which corresponds 44616e592385Swdenk to the given FEC; i. e. 4462c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4463c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4464c26e454dSwdenk 4465c26e454dSwdenk When set to -1, means to probe for first available. 4466c26e454dSwdenk 4467c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4468c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4469c26e454dSwdenk (so program the FEC to ignore it). 4470c26e454dSwdenk 4471c26e454dSwdenk- CONFIG_RMII 4472c26e454dSwdenk Enable RMII mode for all FECs. 4473c26e454dSwdenk Note that this is a global option, we can't 4474c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4475c26e454dSwdenk 44765cf91d6bSwdenk- CONFIG_CRC32_VERIFY 44775cf91d6bSwdenk Add a verify option to the crc32 command. 44785cf91d6bSwdenk The syntax is: 44795cf91d6bSwdenk 44805cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 44815cf91d6bSwdenk 44825cf91d6bSwdenk Where address/count indicate a memory area 44835cf91d6bSwdenk and crc32 is the correct crc32 which the 44845cf91d6bSwdenk area should have. 44855cf91d6bSwdenk 448656523f12Swdenk- CONFIG_LOOPW 448756523f12Swdenk Add the "loopw" memory command. This only takes effect if 4488602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 448956523f12Swdenk 44907b466641Sstroese- CONFIG_MX_CYCLIC 44917b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 44927b466641Sstroese "md/mw" commands. 44937b466641Sstroese Examples: 44947b466641Sstroese 44957b466641Sstroese => mdc.b 10 4 500 44967b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 44977b466641Sstroese 44987b466641Sstroese => mwc.l 100 12345678 10 44997b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 45007b466641Sstroese 45017b466641Sstroese This only takes effect if the memory commands are activated 4502602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 45037b466641Sstroese 45048aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4505afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4506e03f3169SWolfgang Denk low level initializations (like setting up the memory 4507e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4508e03f3169SWolfgang Denk relocate itself into RAM. 45098aa1a2d1Swdenk 4510e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4511e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4512e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4513e03f3169SWolfgang Denk these initializations itself. 45148aa1a2d1Swdenk 4515401bb30bSAneesh V- CONFIG_SPL_BUILD 4516df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4517df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4518df81238bSMagnus Lilja compiling a NAND SPL. 4519400558b5Swdenk 45203aa29de0SYing Zhang- CONFIG_TPL_BUILD 45213aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 45223aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 45233aa29de0SYing Zhang It is loaded by the SPL. 45243aa29de0SYing Zhang 45255df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 45265df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 45275df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 45285df572f0SYing Zhang previous 4k of the .text section. 45295df572f0SYing Zhang 45304213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 45314213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 45324213fc29SSimon Glass effective address. It is therefore not necessary to regard 45334213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 45344213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 45354213fc29SSimon Glass it maintains its own little RAM buffer which contains all 45364213fc29SSimon Glass addressable memory. This option causes some memory accesses 45374213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 45384213fc29SSimon Glass 4539d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4540d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4541d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4542d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4543d8834a13SMatthias Weisser conditions but may increase the binary size. 4544d8834a13SMatthias Weisser 4545588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4546588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4547588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4548b16f521aSGabe Black 4549fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4550fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4551fc33705eSMark Jackson 4552fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 45535b5ece9eSGabe Black 455416678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 455516678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 455616678eb4SHeiko Schocher 4557999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 4558999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 4559999d7d32SKaricheri, Muralidharan driver that uses this: 4560999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 4561999d7d32SKaricheri, Muralidharan 4562f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4563f2717b47STimur Tabi----------------------------------- 4564f2717b47STimur Tabi 4565f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4566f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4567f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4568f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4569f2717b47STimur Tabiwithin that device. 4570f2717b47STimur Tabi 4571dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4572dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4573dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4574dcf1d774SZhao Qiang is also specified. 4575dcf1d774SZhao Qiang 4576dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4577dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4578f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4579f2717b47STimur Tabi is also specified. 4580f2717b47STimur Tabi 4581f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4582f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4583f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4584f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4585f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4586f2717b47STimur Tabi 4587f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4588f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4589f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4590f2717b47STimur Tabi virtual address in NOR flash. 4591f2717b47STimur Tabi 4592f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4593f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4594f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4595f2717b47STimur Tabi 4596f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4597f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4598f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4599f2717b47STimur Tabi 4600f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4601f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4602f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4603f2717b47STimur Tabi 4604292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4605292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4606292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4607fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4608fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4609fc54c7faSLiu Gang master's memory space. 4610f2717b47STimur Tabi 4611c609719bSwdenkBuilding the Software: 4612c609719bSwdenk====================== 4613c609719bSwdenk 4614218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4615218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4616218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4617218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4618218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4619218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4620c609719bSwdenk 4621218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4622218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4623218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4624218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4625218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4626c609719bSwdenk 4627218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4628218ca724SWolfgang Denk $ export CROSS_COMPILE 4629c609719bSwdenk 46302f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 46312f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 46322f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 46332f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 46342f8d396bSPeter Tyser 46352f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 46362f8d396bSPeter Tyser 46372f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 46382f8d396bSPeter Tyser be executed on computers running Windows. 46392f8d396bSPeter Tyser 4640c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4641c609719bSwdenksources you must configure U-Boot for one specific board type. This 4642c609719bSwdenkis done by typing: 4643c609719bSwdenk 4644c609719bSwdenk make NAME_config 4645c609719bSwdenk 4646218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 46474d675ae6SMichael Jonesrations; see boards.cfg for supported names. 464854387ac9Swdenk 4649c609719bSwdenkNote: for some board special configuration names may exist; check if 4650c609719bSwdenk additional information is available from the board vendor; for 46512729af9dSwdenk instance, the TQM823L systems are available without (standard) 46522729af9dSwdenk or with LCD support. You can select such additional "features" 465311ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4654c609719bSwdenk 46552729af9dSwdenk make TQM823L_config 46562729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4657c609719bSwdenk 4658c609719bSwdenk make TQM823L_LCD_config 4659c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4660c609719bSwdenk 4661c609719bSwdenk etc. 4662c609719bSwdenk 4663c609719bSwdenk 4664c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 46657152b1d0Swdenkimages ready for download to / installation on your system: 4666c609719bSwdenk 4667c609719bSwdenk- "u-boot.bin" is a raw binary image 4668c609719bSwdenk- "u-boot" is an image in ELF binary format 4669c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4670c609719bSwdenk 4671baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4672baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4673baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4674baf31249SMarian Balakowicz 4675baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4676baf31249SMarian Balakowicz 4677baf31249SMarian Balakowicz make O=/tmp/build distclean 4678baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4679baf31249SMarian Balakowicz make O=/tmp/build all 4680baf31249SMarian Balakowicz 4681baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4682baf31249SMarian Balakowicz 4683baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4684baf31249SMarian Balakowicz make distclean 4685baf31249SMarian Balakowicz make NAME_config 4686baf31249SMarian Balakowicz make all 4687baf31249SMarian Balakowicz 4688baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4689baf31249SMarian Balakowiczvariable. 4690baf31249SMarian Balakowicz 4691c609719bSwdenk 4692c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4693c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4694c609719bSwdenknative "make". 4695c609719bSwdenk 4696c609719bSwdenk 4697c609719bSwdenkIf the system board that you have is not listed, then you will need 4698c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4699c609719bSwdenksteps: 4700c609719bSwdenk 4701c609719bSwdenk1. Add a new configuration option for your board to the toplevel 47024d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 47034d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4704c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 470585ec0bccSwdenk files you need. In your board directory, you will need at least 470685ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 470785ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 470885ec0bccSwdenk your board 4709c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4710c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 471185ec0bccSwdenk4. Run "make <board>_config" with your new name. 4712c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4713c609719bSwdenk to be installed on your target system. 471485ec0bccSwdenk6. Debug and solve any problems that might arise. 4715c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4716c609719bSwdenk 4717c609719bSwdenk 4718c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4719c609719bSwdenk============================================================== 4720c609719bSwdenk 4721c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4722c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4723c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4724c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4725218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4726c609719bSwdenk 4727c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4728c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4729c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4730c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4731c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 47327152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4733218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4734218ca724SWolfgang Denkyou can type 4735c609719bSwdenk 4736c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4737c609719bSwdenk 4738c609719bSwdenkor to build on a native PowerPC system you can type 4739c609719bSwdenk 4740c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4741c609719bSwdenk 4742218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4743218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4744218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4745218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4746218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4747218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4748218ca724SWolfgang Denkvariable. For example: 4749baf31249SMarian Balakowicz 4750baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4751baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4752baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4753baf31249SMarian Balakowicz 4754218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4755218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4756218ca724SWolfgang Denkduring the whole build process. 4757baf31249SMarian Balakowicz 4758baf31249SMarian Balakowicz 4759c609719bSwdenkSee also "U-Boot Porting Guide" below. 4760c609719bSwdenk 4761c609719bSwdenk 4762c609719bSwdenkMonitor Commands - Overview: 4763c609719bSwdenk============================ 4764c609719bSwdenk 4765c609719bSwdenkgo - start application at address 'addr' 4766c609719bSwdenkrun - run commands in an environment variable 4767c609719bSwdenkbootm - boot application image from memory 4768c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 476944f074c7SMarek Vasutbootz - boot zImage from memory 4770c609719bSwdenktftpboot- boot image via network using TFTP protocol 4771c609719bSwdenk and env variables "ipaddr" and "serverip" 4772c609719bSwdenk (and eventually "gatewayip") 47731fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4774c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4775c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4776c609719bSwdenkloads - load S-Record file over serial line 4777c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4778c609719bSwdenkmd - memory display 4779c609719bSwdenkmm - memory modify (auto-incrementing) 4780c609719bSwdenknm - memory modify (constant address) 4781c609719bSwdenkmw - memory write (fill) 4782c609719bSwdenkcp - memory copy 4783c609719bSwdenkcmp - memory compare 4784c609719bSwdenkcrc32 - checksum calculation 47850f89c54bSPeter Tyseri2c - I2C sub-system 4786c609719bSwdenksspi - SPI utility commands 4787c609719bSwdenkbase - print or set address offset 4788c609719bSwdenkprintenv- print environment variables 4789c609719bSwdenksetenv - set environment variables 4790c609719bSwdenksaveenv - save environment variables to persistent storage 4791c609719bSwdenkprotect - enable or disable FLASH write protection 4792c609719bSwdenkerase - erase FLASH memory 4793c609719bSwdenkflinfo - print FLASH memory information 479410635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4795c609719bSwdenkbdinfo - print Board Info structure 4796c609719bSwdenkiminfo - print header information for application image 4797c609719bSwdenkconinfo - print console devices and informations 4798c609719bSwdenkide - IDE sub-system 4799c609719bSwdenkloop - infinite loop on address range 480056523f12Swdenkloopw - infinite write loop on address range 4801c609719bSwdenkmtest - simple RAM test 4802c609719bSwdenkicache - enable or disable instruction cache 4803c609719bSwdenkdcache - enable or disable data cache 4804c609719bSwdenkreset - Perform RESET of the CPU 4805c609719bSwdenkecho - echo args to console 4806c609719bSwdenkversion - print monitor version 4807c609719bSwdenkhelp - print online help 4808c609719bSwdenk? - alias for 'help' 4809c609719bSwdenk 4810c609719bSwdenk 4811c609719bSwdenkMonitor Commands - Detailed Description: 4812c609719bSwdenk======================================== 4813c609719bSwdenk 4814c609719bSwdenkTODO. 4815c609719bSwdenk 4816c609719bSwdenkFor now: just type "help <command>". 4817c609719bSwdenk 4818c609719bSwdenk 4819c609719bSwdenkEnvironment Variables: 4820c609719bSwdenk====================== 4821c609719bSwdenk 4822c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4823c609719bSwdenkcan be made persistent by saving to Flash memory. 4824c609719bSwdenk 4825c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4826c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4827c609719bSwdenkwithout a value can be used to delete a variable from the 4828c609719bSwdenkenvironment. As long as you don't save the environment you are 4829c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4830c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4831c609719bSwdenk 4832c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4833c96f86eeSWolfgang Denk 4834c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4835c609719bSwdenk 4836c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4837c609719bSwdenk 4838c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4839c609719bSwdenk 4840c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4841c609719bSwdenk 4842c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4843c609719bSwdenk 4844c609719bSwdenk bootfile - Name of the image to load with TFTP 4845c609719bSwdenk 48467d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 48477d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48487d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 48497d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 48507d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 48517d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4852c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4853c3624e6eSGrant Likely bootm_mapsize. 4854c3624e6eSGrant Likely 4855c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4856c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4857c3624e6eSGrant Likely defines the size of the memory region starting at base 4858c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4859c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4860c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4861c3624e6eSGrant Likely used otherwise. 48627d721e34SBartlomiej Sieka 48637d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 48647d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48657d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 48667d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 48677d721e34SBartlomiej Sieka environment variable. 48687d721e34SBartlomiej Sieka 48694bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 48704bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 48714bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 48724bae9090SBartlomiej Sieka 4873c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4874c609719bSwdenk "bootp" will just load perform a lookup of the 4875c609719bSwdenk configuration from the BOOTP server, but not try to 4876c609719bSwdenk load any image using TFTP 4877c609719bSwdenk 4878c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4879c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4880c609719bSwdenk be automatically started (by internally calling 4881c609719bSwdenk "bootm") 4882c609719bSwdenk 48834a6fd34bSwdenk If set to "no", a standalone image passed to the 48844a6fd34bSwdenk "bootm" command will be copied to the load address 48854a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 48864a6fd34bSwdenk This can be used to load and uncompress arbitrary 48874a6fd34bSwdenk data. 48884a6fd34bSwdenk 4889a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4890a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4891fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4892fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4893fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4894fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4895fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4896fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4897fa34f6b2SShawn Guo access it during the boot procedure. 4898fa34f6b2SShawn Guo 4899a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4900a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4901a28afca5SDavid A. Long to work it must reside in writable memory, have 4902a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4903a28afca5SDavid A. Long add the information it needs into it, and the memory 4904a28afca5SDavid A. Long must be accessible by the kernel. 4905a28afca5SDavid A. Long 4906eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4907eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4908eea63e05SSimon Glass defined. 4909eea63e05SSimon Glass 491017ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 491117ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 491217ea1177Swdenk mode (400kHZ). This environment variable is used in 491317ea1177Swdenk initialization code. So, for changes to be effective 491417ea1177Swdenk it must be saved and board must be reset. 491517ea1177Swdenk 4916c609719bSwdenk initrd_high - restrict positioning of initrd images: 4917c609719bSwdenk If this variable is not set, initrd images will be 4918c609719bSwdenk copied to the highest possible address in RAM; this 4919c609719bSwdenk is usually what you want since it allows for 4920c609719bSwdenk maximum initrd size. If for some reason you want to 4921c609719bSwdenk make sure that the initrd image is loaded below the 49226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4923c609719bSwdenk variable to a value of "no" or "off" or "0". 4924c609719bSwdenk Alternatively, you can set it to a maximum upper 4925c609719bSwdenk address to use (U-Boot will still check that it 4926c609719bSwdenk does not overwrite the U-Boot stack and data). 4927c609719bSwdenk 4928c609719bSwdenk For instance, when you have a system with 16 MB 49297152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4930c609719bSwdenk you can do this by adding "mem=12M" to the value of 4931c609719bSwdenk the "bootargs" variable. However, now you must make 49327152b1d0Swdenk sure that the initrd image is placed in the first 4933c609719bSwdenk 12 MB as well - this can be done with 4934c609719bSwdenk 4935c609719bSwdenk setenv initrd_high 00c00000 4936c609719bSwdenk 493738b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 493838b99261Swdenk indication to U-Boot that all addresses are legal 493938b99261Swdenk for the Linux kernel, including addresses in flash 494038b99261Swdenk memory. In this case U-Boot will NOT COPY the 494138b99261Swdenk ramdisk at all. This may be useful to reduce the 494238b99261Swdenk boot time on your system, but requires that this 494338b99261Swdenk feature is supported by your Linux kernel. 494438b99261Swdenk 4945c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4946c609719bSwdenk 4947c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4948dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4949c609719bSwdenk 4950c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4951c609719bSwdenk 4952c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4953c609719bSwdenk 4954c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4955c609719bSwdenk 4956c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4957c609719bSwdenk 4958c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4959c609719bSwdenk 4960e2a53458SMike Frysinger ethprime - controls which interface is used first. 4961a3d991bdSwdenk 4962e2a53458SMike Frysinger ethact - controls which interface is currently active. 4963e2a53458SMike Frysinger For example you can do the following 4964a3d991bdSwdenk 496548690d80SHeiko Schocher => setenv ethact FEC 496648690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 496748690d80SHeiko Schocher => setenv ethact SCC 496848690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4969a3d991bdSwdenk 4970e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4971e1692577SMatthias Fuchs available network interfaces. 4972e1692577SMatthias Fuchs It just stays at the currently selected interface. 4973e1692577SMatthias Fuchs 4974a3d991bdSwdenk netretry - When set to "no" each network operation will 4975a3d991bdSwdenk either succeed or fail without retrying. 49766e592385Swdenk When set to "once" the network operation will 49776e592385Swdenk fail when all the available network interfaces 49786e592385Swdenk are tried once without success. 4979a3d991bdSwdenk Useful on scripts which control the retry operation 4980a3d991bdSwdenk themselves. 4981a3d991bdSwdenk 4982b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4983a1cf027aSJean-Christophe PLAGNIOL-VILLARD 49848d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 49858d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 49868d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 49878d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 49888d51aacdSSimon Glass is silent. 49898d51aacdSSimon Glass 499028cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4991ecb0ccd9SWolfgang Denk UDP source port. 4992ecb0ccd9SWolfgang Denk 499328cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 499428cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 499528cb9375SWolfgang Denk 4996c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4997c96f86eeSWolfgang Denk we use the TFTP server's default block size 4998c96f86eeSWolfgang Denk 4999c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 5000c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 5001c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 5002c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 5003c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 5004c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 5005c96f86eeSWolfgang Denk with unreliable TFTP servers. 5006c96f86eeSWolfgang Denk 5007a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 500811ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 5009a3d991bdSwdenk VLAN tagged frames. 5010c609719bSwdenk 5011dc0b7b0eSJason HobbsThe following image location variables contain the location of images 5012dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 5013dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 5014dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 5015dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 5016dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 5017dc0b7b0eSJason Hobbsflash or offset in NAND flash. 5018dc0b7b0eSJason Hobbs 5019dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 5020dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 5021dc0b7b0eSJason Hobbsboards use these variables for other purposes. 5022dc0b7b0eSJason Hobbs 5023dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 5024dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5025dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5026dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5027dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5028dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5029dc0b7b0eSJason Hobbs 5030c609719bSwdenkThe following environment variables may be used and automatically 5031c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5032c609719bSwdenkdepending the information provided by your boot server: 5033c609719bSwdenk 5034c609719bSwdenk bootfile - see above 5035c609719bSwdenk dnsip - IP address of your Domain Name Server 5036fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5037c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5038c609719bSwdenk hostname - Target hostname 5039c609719bSwdenk ipaddr - see above 5040c609719bSwdenk netmask - Subnet Mask 5041c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5042c609719bSwdenk serverip - see above 5043c609719bSwdenk 5044c609719bSwdenk 5045c609719bSwdenkThere are two special Environment Variables: 5046c609719bSwdenk 5047c609719bSwdenk serial# - contains hardware identification information such 5048c609719bSwdenk as type string and/or serial number 5049c609719bSwdenk ethaddr - Ethernet address 5050c609719bSwdenk 5051c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5052c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5053c609719bSwdenkonce they have been set once. 5054c609719bSwdenk 5055c609719bSwdenk 5056c1551ea8SstroeseFurther special Environment Variables: 5057c1551ea8Sstroese 5058c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5059c1551ea8Sstroese with the "version" command. This variable is 5060c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5061c1551ea8Sstroese 5062c1551ea8Sstroese 5063c609719bSwdenkPlease note that changes to some configuration parameters may take 5064c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5065c609719bSwdenk 5066c609719bSwdenk 5067170ab110SJoe HershbergerCallback functions for environment variables: 5068170ab110SJoe Hershberger--------------------------------------------- 5069170ab110SJoe Hershberger 5070170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5071170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5072170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5073170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5074170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5075170ab110SJoe Hershberger 5076170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5077170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5078170ab110SJoe Hershberger 5079170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5080170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5081170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5082170ab110SJoe Hershbergerassociations. The list must be in the following format: 5083170ab110SJoe Hershberger 5084170ab110SJoe Hershberger entry = variable_name[:callback_name] 5085170ab110SJoe Hershberger list = entry[,list] 5086170ab110SJoe Hershberger 5087170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5088170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5089170ab110SJoe Hershberger 5090170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5091170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5092170ab110SJoe Hershbergeroverride any association in the static list. You can define 5093170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5094170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5095170ab110SJoe Hershberger 5096170ab110SJoe Hershberger 5097f07771ccSwdenkCommand Line Parsing: 5098f07771ccSwdenk===================== 5099f07771ccSwdenk 5100f07771ccSwdenkThere are two different command line parsers available with U-Boot: 51017152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5102f07771ccSwdenk 5103f07771ccSwdenkOld, simple command line parser: 5104f07771ccSwdenk-------------------------------- 5105f07771ccSwdenk 5106f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5107f07771ccSwdenk- several commands on one line, separated by ';' 5108fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5109f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5110f07771ccSwdenk for example: 5111fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5112f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5113f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5114f07771ccSwdenk 5115f07771ccSwdenkHush shell: 5116f07771ccSwdenk----------- 5117f07771ccSwdenk 5118f07771ccSwdenk- similar to Bourne shell, with control structures like 5119f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5120f07771ccSwdenk until...do...done, ... 5121f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5122f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5123f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5124f07771ccSwdenk command 5125f07771ccSwdenk 5126f07771ccSwdenkGeneral rules: 5127f07771ccSwdenk-------------- 5128f07771ccSwdenk 5129f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5130f07771ccSwdenk command) contains several commands separated by semicolon, and 5131f07771ccSwdenk one of these commands fails, then the remaining commands will be 5132f07771ccSwdenk executed anyway. 5133f07771ccSwdenk 5134f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 513511ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5136f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5137f07771ccSwdenk variables are not executed. 5138f07771ccSwdenk 5139c609719bSwdenkNote for Redundant Ethernet Interfaces: 5140c609719bSwdenk======================================= 5141c609719bSwdenk 514211ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5143c609719bSwdenksuch configurations and is capable of automatic selection of a 51447152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5145c609719bSwdenk 5146c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5147c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5148c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5149c609719bSwdenk 5150c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5151c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5152c609719bSwdenkding setting in the environment; if the corresponding environment 5153c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5154c609719bSwdenk 5155c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5156c609719bSwdenk environment, the SROM's address is used. 5157c609719bSwdenk 5158c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5159c609719bSwdenk environment exists, then the value from the environment variable is 5160c609719bSwdenk used. 5161c609719bSwdenk 5162c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5163c609719bSwdenk both addresses are the same, this MAC address is used. 5164c609719bSwdenk 5165c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5166c609719bSwdenk addresses differ, the value from the environment is used and a 5167c609719bSwdenk warning is printed. 5168c609719bSwdenk 5169c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5170c609719bSwdenk is raised. 5171c609719bSwdenk 5172ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5173ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5174ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5175ecee9324SBen WarrenThe naming convention is as follows: 5176ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5177c609719bSwdenk 5178c609719bSwdenkImage Formats: 5179c609719bSwdenk============== 5180c609719bSwdenk 51813310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 51823310c549SMarian Balakowiczimages in two formats: 51833310c549SMarian Balakowicz 51843310c549SMarian BalakowiczNew uImage format (FIT) 51853310c549SMarian Balakowicz----------------------- 51863310c549SMarian Balakowicz 51873310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 51883310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 51893310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 51903310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 51913310c549SMarian Balakowicz 51923310c549SMarian Balakowicz 51933310c549SMarian BalakowiczOld uImage format 51943310c549SMarian Balakowicz----------------- 51953310c549SMarian Balakowicz 51963310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 51973310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 51983310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5199c609719bSwdenk 5200c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5201c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5202f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5203f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5204f5ed9e39SPeter Tyser INTEGRITY). 52057b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5206afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5207afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5208c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5209c609719bSwdenk* Load Address 5210c609719bSwdenk* Entry Point 5211c609719bSwdenk* Image Name 5212c609719bSwdenk* Image Timestamp 5213c609719bSwdenk 5214c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5215c609719bSwdenkand the data portions of the image are secured against corruption by 5216c609719bSwdenkCRC32 checksums. 5217c609719bSwdenk 5218c609719bSwdenk 5219c609719bSwdenkLinux Support: 5220c609719bSwdenk============== 5221c609719bSwdenk 5222c609719bSwdenkAlthough U-Boot should support any OS or standalone application 52237152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5224c609719bSwdenkU-Boot. 5225c609719bSwdenk 5226c609719bSwdenkU-Boot includes many features that so far have been part of some 5227c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5228c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5229c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 52307152b1d0Swdenkserves several purposes: 5231c609719bSwdenk 5232c609719bSwdenk- the same features can be used for other OS or standalone 5233c609719bSwdenk applications (for instance: using compressed images to reduce the 5234c609719bSwdenk Flash memory footprint) 5235c609719bSwdenk 5236c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 52377152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5238c609719bSwdenk 5239c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5240c609719bSwdenk images; of course this also means that different kernel images can 5241c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5242c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5243c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5244c609719bSwdenk software is easier now. 5245c609719bSwdenk 5246c609719bSwdenk 5247c609719bSwdenkLinux HOWTO: 5248c609719bSwdenk============ 5249c609719bSwdenk 5250c609719bSwdenkPorting Linux to U-Boot based systems: 5251c609719bSwdenk--------------------------------------- 5252c609719bSwdenk 5253c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5254c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5255c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5256c609719bSwdenkLinux :-). 5257c609719bSwdenk 5258a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5259c609719bSwdenk 5260c609719bSwdenkJust make sure your machine specific header file (for instance 5261c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 52621dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 52631dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 52646d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5265c609719bSwdenk 5266c609719bSwdenk 5267c609719bSwdenkConfiguring the Linux kernel: 5268c609719bSwdenk----------------------------- 5269c609719bSwdenk 5270c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5271c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5272c609719bSwdenk 5273c609719bSwdenk 5274c609719bSwdenkBuilding a Linux Image: 5275c609719bSwdenk----------------------- 5276c609719bSwdenk 527724ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 527824ee89b9Swdenknot used. If you use recent kernel source, a new build target 527924ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 528024ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 528124ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 528224ee89b9Swdenk100% compatible format. 5283c609719bSwdenk 5284c609719bSwdenkExample: 5285c609719bSwdenk 5286c609719bSwdenk make TQM850L_config 5287c609719bSwdenk make oldconfig 5288c609719bSwdenk make dep 528924ee89b9Swdenk make uImage 5290c609719bSwdenk 529124ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 529224ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 529324ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5294c609719bSwdenk 529524ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 529624ee89b9Swdenk 529724ee89b9Swdenk* convert the kernel into a raw binary image: 529824ee89b9Swdenk 529924ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 530024ee89b9Swdenk -R .note -R .comment \ 530124ee89b9Swdenk -S vmlinux linux.bin 530224ee89b9Swdenk 530324ee89b9Swdenk* compress the binary image: 530424ee89b9Swdenk 530524ee89b9Swdenk gzip -9 linux.bin 530624ee89b9Swdenk 530724ee89b9Swdenk* package compressed binary image for U-Boot: 530824ee89b9Swdenk 530924ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 531024ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 531124ee89b9Swdenk -d linux.bin.gz uImage 531224ee89b9Swdenk 531324ee89b9Swdenk 531424ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 531524ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 531624ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 531724ee89b9Swdenkbyte header containing information about target architecture, 531824ee89b9Swdenkoperating system, image type, compression method, entry points, time 531924ee89b9Swdenkstamp, CRC32 checksums, etc. 532024ee89b9Swdenk 532124ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 532224ee89b9Swdenkprint the header information, or to build new images. 5323c609719bSwdenk 5324c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5325c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5326c609719bSwdenkchecksum verification: 5327c609719bSwdenk 5328c609719bSwdenk tools/mkimage -l image 5329c609719bSwdenk -l ==> list image header information 5330c609719bSwdenk 5331c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5332c609719bSwdenkfrom a "data file" which is used as image payload: 5333c609719bSwdenk 5334c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5335c609719bSwdenk -n name -d data_file image 5336c609719bSwdenk -A ==> set architecture to 'arch' 5337c609719bSwdenk -O ==> set operating system to 'os' 5338c609719bSwdenk -T ==> set image type to 'type' 5339c609719bSwdenk -C ==> set compression type 'comp' 5340c609719bSwdenk -a ==> set load address to 'addr' (hex) 5341c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5342c609719bSwdenk -n ==> set image name to 'name' 5343c609719bSwdenk -d ==> use image data from 'datafile' 5344c609719bSwdenk 534569459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 534669459791Swdenkaddress (0x00000000), but the entry point address depends on the 534769459791Swdenkkernel version: 5348c609719bSwdenk 5349c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 535024ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5351c609719bSwdenk 5352c609719bSwdenkSo a typical call to build a U-Boot image would read: 5353c609719bSwdenk 535424ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 535524ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5356a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 535724ee89b9Swdenk > examples/uImage.TQM850L 535824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5359c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5360c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5361c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5362c609719bSwdenk Load Address: 0x00000000 536324ee89b9Swdenk Entry Point: 0x00000000 5364c609719bSwdenk 5365c609719bSwdenkTo verify the contents of the image (or check for corruption): 5366c609719bSwdenk 536724ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 536824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5369c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5370c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5371c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5372c609719bSwdenk Load Address: 0x00000000 537324ee89b9Swdenk Entry Point: 0x00000000 5374c609719bSwdenk 5375c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5376c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5377c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5378c609719bSwdenkneed to be uncompressed: 5379c609719bSwdenk 5380a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 538124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 538224ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5383a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 538424ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 538524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5386c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5387c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5388c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5389c609719bSwdenk Load Address: 0x00000000 539024ee89b9Swdenk Entry Point: 0x00000000 5391c609719bSwdenk 5392c609719bSwdenk 5393c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5394c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5395c609719bSwdenk 5396c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5397c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5398c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5399c609719bSwdenk Image Name: Simple Ramdisk Image 5400c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5401c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5402c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5403c609719bSwdenk Load Address: 0x00000000 5404c609719bSwdenk Entry Point: 0x00000000 5405c609719bSwdenk 5406a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5407a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5408a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5409a804b5ceSGuilherme Maciel Ferreirafrom the image: 5410a804b5ceSGuilherme Maciel Ferreira 5411a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5412a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5413a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5414a804b5ceSGuilherme Maciel Ferreira 5415c609719bSwdenk 5416c609719bSwdenkInstalling a Linux Image: 5417c609719bSwdenk------------------------- 5418c609719bSwdenk 5419c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5420c609719bSwdenkyou must convert the image to S-Record format: 5421c609719bSwdenk 5422c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5423c609719bSwdenk 5424c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5425c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5426c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5427c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5428c609719bSwdenkcommand. 5429c609719bSwdenk 5430c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5431c609719bSwdenkTQM8xxL is in the first Flash bank): 5432c609719bSwdenk 5433c609719bSwdenk => erase 40100000 401FFFFF 5434c609719bSwdenk 5435c609719bSwdenk .......... done 5436c609719bSwdenk Erased 8 sectors 5437c609719bSwdenk 5438c609719bSwdenk => loads 40100000 5439c609719bSwdenk ## Ready for S-Record download ... 5440c609719bSwdenk ~>examples/image.srec 5441c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5442c609719bSwdenk ... 5443c609719bSwdenk 15989 15990 15991 15992 5444c609719bSwdenk [file transfer complete] 5445c609719bSwdenk [connected] 5446c609719bSwdenk ## Start Addr = 0x00000000 5447c609719bSwdenk 5448c609719bSwdenk 5449c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5450c609719bSwdenkthis includes a checksum verification so you can be sure no data 5451c609719bSwdenkcorruption happened: 5452c609719bSwdenk 5453c609719bSwdenk => imi 40100000 5454c609719bSwdenk 5455c609719bSwdenk ## Checking Image at 40100000 ... 5456c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5457c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5458c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5459c609719bSwdenk Load Address: 00000000 5460c609719bSwdenk Entry Point: 0000000c 5461c609719bSwdenk Verifying Checksum ... OK 5462c609719bSwdenk 5463c609719bSwdenk 5464c609719bSwdenkBoot Linux: 5465c609719bSwdenk----------- 5466c609719bSwdenk 5467c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5468c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5469c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5470c609719bSwdenkparameters. You can check and modify this variable using the 5471c609719bSwdenk"printenv" and "setenv" commands: 5472c609719bSwdenk 5473c609719bSwdenk 5474c609719bSwdenk => printenv bootargs 5475c609719bSwdenk bootargs=root=/dev/ram 5476c609719bSwdenk 5477c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5478c609719bSwdenk 5479c609719bSwdenk => printenv bootargs 5480c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5481c609719bSwdenk 5482c609719bSwdenk => bootm 40020000 5483c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5484c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5485c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5486c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5487c609719bSwdenk Load Address: 00000000 5488c609719bSwdenk Entry Point: 0000000c 5489c609719bSwdenk Verifying Checksum ... OK 5490c609719bSwdenk Uncompressing Kernel Image ... OK 5491c609719bSwdenk 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 5492c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5493c609719bSwdenk time_init: decrementer frequency = 187500000/60 5494c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5495c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5496c609719bSwdenk ... 5497c609719bSwdenk 549811ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 54997152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5500c609719bSwdenkformat!) to the "bootm" command: 5501c609719bSwdenk 5502c609719bSwdenk => imi 40100000 40200000 5503c609719bSwdenk 5504c609719bSwdenk ## Checking Image at 40100000 ... 5505c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5506c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5507c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5508c609719bSwdenk Load Address: 00000000 5509c609719bSwdenk Entry Point: 0000000c 5510c609719bSwdenk Verifying Checksum ... OK 5511c609719bSwdenk 5512c609719bSwdenk ## Checking Image at 40200000 ... 5513c609719bSwdenk Image Name: Simple Ramdisk Image 5514c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5515c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5516c609719bSwdenk Load Address: 00000000 5517c609719bSwdenk Entry Point: 00000000 5518c609719bSwdenk Verifying Checksum ... OK 5519c609719bSwdenk 5520c609719bSwdenk => bootm 40100000 40200000 5521c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5522c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5523c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5524c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5525c609719bSwdenk Load Address: 00000000 5526c609719bSwdenk Entry Point: 0000000c 5527c609719bSwdenk Verifying Checksum ... OK 5528c609719bSwdenk Uncompressing Kernel Image ... OK 5529c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5530c609719bSwdenk Image Name: Simple Ramdisk Image 5531c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5532c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5533c609719bSwdenk Load Address: 00000000 5534c609719bSwdenk Entry Point: 00000000 5535c609719bSwdenk Verifying Checksum ... OK 5536c609719bSwdenk Loading Ramdisk ... OK 5537c609719bSwdenk 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 5538c609719bSwdenk Boot arguments: root=/dev/ram 5539c609719bSwdenk time_init: decrementer frequency = 187500000/60 5540c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5541c609719bSwdenk ... 5542c609719bSwdenk RAMDISK: Compressed image found at block 0 5543c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5544c609719bSwdenk 5545c609719bSwdenk bash# 5546c609719bSwdenk 55470267768eSMatthew McClintockBoot Linux and pass a flat device tree: 55480267768eSMatthew McClintock----------- 55490267768eSMatthew McClintock 55500267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 55510267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 55520267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 55530267768eSMatthew McClintockflat device tree: 55540267768eSMatthew McClintock 55550267768eSMatthew McClintock=> print oftaddr 55560267768eSMatthew McClintockoftaddr=0x300000 55570267768eSMatthew McClintock=> print oft 55580267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 55590267768eSMatthew McClintock=> tftp $oftaddr $oft 55600267768eSMatthew McClintockSpeed: 1000, full duplex 55610267768eSMatthew McClintockUsing TSEC0 device 55620267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 55630267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 55640267768eSMatthew McClintockLoad address: 0x300000 55650267768eSMatthew McClintockLoading: # 55660267768eSMatthew McClintockdone 55670267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 55680267768eSMatthew McClintock=> tftp $loadaddr $bootfile 55690267768eSMatthew McClintockSpeed: 1000, full duplex 55700267768eSMatthew McClintockUsing TSEC0 device 55710267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 55720267768eSMatthew McClintockFilename 'uImage'. 55730267768eSMatthew McClintockLoad address: 0x200000 55740267768eSMatthew McClintockLoading:############ 55750267768eSMatthew McClintockdone 55760267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 55770267768eSMatthew McClintock=> print loadaddr 55780267768eSMatthew McClintockloadaddr=200000 55790267768eSMatthew McClintock=> print oftaddr 55800267768eSMatthew McClintockoftaddr=0x300000 55810267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 55820267768eSMatthew McClintock## Booting image at 00200000 ... 55830267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 55840267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 55850267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 55860267768eSMatthew McClintock Load Address: 00000000 55870267768eSMatthew McClintock Entry Point: 00000000 55880267768eSMatthew McClintock Verifying Checksum ... OK 55890267768eSMatthew McClintock Uncompressing Kernel Image ... OK 55900267768eSMatthew McClintockBooting using flat device tree at 0x300000 55910267768eSMatthew McClintockUsing MPC85xx ADS machine description 55920267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 55930267768eSMatthew McClintock[snip] 55940267768eSMatthew McClintock 55950267768eSMatthew McClintock 55966069ff26SwdenkMore About U-Boot Image Types: 55976069ff26Swdenk------------------------------ 55986069ff26Swdenk 55996069ff26SwdenkU-Boot supports the following image types: 56006069ff26Swdenk 56016069ff26Swdenk "Standalone Programs" are directly runnable in the environment 56026069ff26Swdenk provided by U-Boot; it is expected that (if they behave 56036069ff26Swdenk well) you can continue to work in U-Boot after return from 56046069ff26Swdenk the Standalone Program. 56056069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 56066069ff26Swdenk will take over control completely. Usually these programs 56076069ff26Swdenk will install their own set of exception handlers, device 56086069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 56096069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 56106069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 56116069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 56126069ff26Swdenk being started. 56136069ff26Swdenk "Multi-File Images" contain several images, typically an OS 56146069ff26Swdenk (Linux) kernel image and one or more data images like 56156069ff26Swdenk RAMDisks. This construct is useful for instance when you want 56166069ff26Swdenk to boot over the network using BOOTP etc., where the boot 56176069ff26Swdenk server provides just a single image file, but you want to get 56186069ff26Swdenk for instance an OS kernel and a RAMDisk image. 56196069ff26Swdenk 56206069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 56216069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 56226069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 56236069ff26Swdenk Immediately after the terminating 0 follow the images, one by 56246069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 56256069ff26Swdenk a multiple of 4 bytes). 56266069ff26Swdenk 56276069ff26Swdenk "Firmware Images" are binary images containing firmware (like 56286069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 56296069ff26Swdenk flash memory. 56306069ff26Swdenk 56316069ff26Swdenk "Script files" are command sequences that will be executed by 56326069ff26Swdenk U-Boot's command interpreter; this feature is especially 56336069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 56346069ff26Swdenk as command interpreter. 56356069ff26Swdenk 563644f074c7SMarek VasutBooting the Linux zImage: 563744f074c7SMarek Vasut------------------------- 563844f074c7SMarek Vasut 563944f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 564044f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 564144f074c7SMarek Vasutas the syntax of "bootm" command. 564244f074c7SMarek Vasut 56438ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5644017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5645017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5646017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5647017e1f3fSMarek Vasut 5648c609719bSwdenk 5649c609719bSwdenkStandalone HOWTO: 5650c609719bSwdenk================= 5651c609719bSwdenk 5652c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5653c609719bSwdenkrun "standalone" applications, which can use some resources of 5654c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5655c609719bSwdenk 5656c609719bSwdenkTwo simple examples are included with the sources: 5657c609719bSwdenk 5658c609719bSwdenk"Hello World" Demo: 5659c609719bSwdenk------------------- 5660c609719bSwdenk 5661c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5662c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5663c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5664c609719bSwdenklike that: 5665c609719bSwdenk 5666c609719bSwdenk => loads 5667c609719bSwdenk ## Ready for S-Record download ... 5668c609719bSwdenk ~>examples/hello_world.srec 5669c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5670c609719bSwdenk [file transfer complete] 5671c609719bSwdenk [connected] 5672c609719bSwdenk ## Start Addr = 0x00040004 5673c609719bSwdenk 5674c609719bSwdenk => go 40004 Hello World! This is a test. 5675c609719bSwdenk ## Starting application at 0x00040004 ... 5676c609719bSwdenk Hello World 5677c609719bSwdenk argc = 7 5678c609719bSwdenk argv[0] = "40004" 5679c609719bSwdenk argv[1] = "Hello" 5680c609719bSwdenk argv[2] = "World!" 5681c609719bSwdenk argv[3] = "This" 5682c609719bSwdenk argv[4] = "is" 5683c609719bSwdenk argv[5] = "a" 5684c609719bSwdenk argv[6] = "test." 5685c609719bSwdenk argv[7] = "<NULL>" 5686c609719bSwdenk Hit any key to exit ... 5687c609719bSwdenk 5688c609719bSwdenk ## Application terminated, rc = 0x0 5689c609719bSwdenk 5690c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5691c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5692c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5693c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5694c609719bSwdenkcharacter, but this is just a demo program. The application can be 5695c609719bSwdenkcontrolled by the following keys: 5696c609719bSwdenk 5697c609719bSwdenk ? - print current values og the CPM Timer registers 5698c609719bSwdenk b - enable interrupts and start timer 5699c609719bSwdenk e - stop timer and disable interrupts 5700c609719bSwdenk q - quit application 5701c609719bSwdenk 5702c609719bSwdenk => loads 5703c609719bSwdenk ## Ready for S-Record download ... 5704c609719bSwdenk ~>examples/timer.srec 5705c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5706c609719bSwdenk [file transfer complete] 5707c609719bSwdenk [connected] 5708c609719bSwdenk ## Start Addr = 0x00040004 5709c609719bSwdenk 5710c609719bSwdenk => go 40004 5711c609719bSwdenk ## Starting application at 0x00040004 ... 5712c609719bSwdenk TIMERS=0xfff00980 5713c609719bSwdenk Using timer 1 5714c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5715c609719bSwdenk 5716c609719bSwdenkHit 'b': 5717c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5718c609719bSwdenk Enabling timer 5719c609719bSwdenkHit '?': 5720c609719bSwdenk [q, b, e, ?] ........ 5721c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5722c609719bSwdenkHit '?': 5723c609719bSwdenk [q, b, e, ?] . 5724c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5725c609719bSwdenkHit '?': 5726c609719bSwdenk [q, b, e, ?] . 5727c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5728c609719bSwdenkHit '?': 5729c609719bSwdenk [q, b, e, ?] . 5730c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5731c609719bSwdenkHit 'e': 5732c609719bSwdenk [q, b, e, ?] ...Stopping timer 5733c609719bSwdenkHit 'q': 5734c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5735c609719bSwdenk 5736c609719bSwdenk 573785ec0bccSwdenkMinicom warning: 573885ec0bccSwdenk================ 573985ec0bccSwdenk 57407152b1d0SwdenkOver time, many people have reported problems when trying to use the 574185ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 574285ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5743f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 574485ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5745e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5746e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5747e53515a2SKarl O. Pincfor help with kermit. 5748e53515a2SKarl O. Pinc 574985ec0bccSwdenk 575052f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 575152f52c14Swdenkconfiguration to your "File transfer protocols" section: 575252f52c14Swdenk 575352f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 575452f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 575552f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 575652f52c14Swdenk 575752f52c14Swdenk 5758c609719bSwdenkNetBSD Notes: 5759c609719bSwdenk============= 5760c609719bSwdenk 5761c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5762c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5763c609719bSwdenk 5764c609719bSwdenkBuilding requires a cross environment; it is known to work on 5765c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5766c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5767c609719bSwdenkNote that the cross-powerpc package does not install include files; 5768c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5769c609719bSwdenkmissing. This file has to be installed and patched manually: 5770c609719bSwdenk 5771c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5772c609719bSwdenk # mkdir powerpc 5773c609719bSwdenk # ln -s powerpc machine 5774c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5775c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5776c609719bSwdenk 5777c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5778c609719bSwdenkand U-Boot include files. 5779c609719bSwdenk 5780c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5781c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5782c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5783c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 57842a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5785c609719bSwdenk 5786c609719bSwdenk 5787c609719bSwdenkImplementation Internals: 5788c609719bSwdenk========================= 5789c609719bSwdenk 5790c609719bSwdenkThe following is not intended to be a complete description of every 5791c609719bSwdenkimplementation detail. However, it should help to understand the 5792c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5793c609719bSwdenkhardware. 5794c609719bSwdenk 5795c609719bSwdenk 5796c609719bSwdenkInitial Stack, Global Data: 5797c609719bSwdenk--------------------------- 5798c609719bSwdenk 5799c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5800c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5801c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5802c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5803c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5804c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5805c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5806c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5807c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5808c609719bSwdenklocked as (mis-) used as memory, etc. 5809c609719bSwdenk 58107152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 58110668236bSWolfgang Denk U-Boot mailing list: 581243d9616cSwdenk 581343d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 581443d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 581543d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 581643d9616cSwdenk ... 581743d9616cSwdenk 581843d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 581943d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 582043d9616cSwdenk require any physical RAM backing up the cache. The cleverness 582143d9616cSwdenk is that the cache is being used as a temporary supply of 582243d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 582311ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 582443d9616cSwdenk can see how this works by studying the cache architecture and 582543d9616cSwdenk operation in the architecture and processor-specific manuals. 582643d9616cSwdenk 582743d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 582843d9616cSwdenk is another option for the system designer to use as an 582911ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 583043d9616cSwdenk option should work for you. Using CS 4 should be fine if your 583143d9616cSwdenk board designers haven't used it for something that would 583243d9616cSwdenk cause you grief during the initial boot! It is frequently not 583343d9616cSwdenk used. 583443d9616cSwdenk 58356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 583643d9616cSwdenk with your processor/board/system design. The default value 583743d9616cSwdenk you will find in any recent u-boot distribution in 58388a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 583943d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 584043d9616cSwdenk it above 400_0000. Just make sure your board has no resources 584143d9616cSwdenk that are supposed to respond to that address! That code in 584243d9616cSwdenk start.S has been around a while and should work as is when 584343d9616cSwdenk you get the config right. 584443d9616cSwdenk 584543d9616cSwdenk -Chris Hallinan 584643d9616cSwdenk DS4.COM, Inc. 584743d9616cSwdenk 5848c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5849c609719bSwdenkcode for the initialization procedures: 5850c609719bSwdenk 5851c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5852c609719bSwdenk to write it. 5853c609719bSwdenk 585411ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5855c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 58567152b1d0Swdenk zation is performed later (when relocating to RAM). 5857c609719bSwdenk 5858c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5859c609719bSwdenk that. 5860c609719bSwdenk 5861c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5862c609719bSwdenknormal global data to share information beween the code. But it 5863c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5864c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5865c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5866c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5867c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5868c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5869c609719bSwdenkreserve for this purpose. 5870c609719bSwdenk 58717152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5872c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5873c609719bSwdenkGCC's implementation. 5874c609719bSwdenk 5875c609719bSwdenkFor PowerPC, the following registers have specific use: 5876c609719bSwdenk R1: stack pointer 5877e7670f6cSWolfgang Denk R2: reserved for system use 5878c609719bSwdenk R3-R4: parameter passing and return values 5879c609719bSwdenk R5-R10: parameter passing 5880c609719bSwdenk R13: small data area pointer 5881c609719bSwdenk R30: GOT pointer 5882c609719bSwdenk R31: frame pointer 5883c609719bSwdenk 5884e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5885e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5886e6bee808SJoakim Tjernlund going back and forth between asm and C) 5887c609719bSwdenk 5888e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5889c609719bSwdenk 5890c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5891c609719bSwdenk address of the global data structure is known at compile time), 5892c609719bSwdenk but it turned out that reserving a register results in somewhat 5893c609719bSwdenk smaller code - although the code savings are not that big (on 5894c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5895c609719bSwdenk 624 text + 127 data). 5896c609719bSwdenk 5897c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 58984c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 58994c58eb55SMike Frysinger 5900c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 59014c58eb55SMike Frysinger 5902c609719bSwdenkOn ARM, the following registers are used: 5903c609719bSwdenk 5904c609719bSwdenk R0: function argument word/integer result 5905c609719bSwdenk R1-R3: function argument word 590612eba1b4SJeroen Hofstee R9: platform specific 590712eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 5908c609719bSwdenk R11: argument (frame) pointer 5909c609719bSwdenk R12: temporary workspace 5910c609719bSwdenk R13: stack pointer 5911c609719bSwdenk R14: link register 5912c609719bSwdenk R15: program counter 5913c609719bSwdenk 591412eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 591512eba1b4SJeroen Hofstee 591612eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 5917c609719bSwdenk 59180df01fd3SThomas ChouOn Nios II, the ABI is documented here: 59190df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 59200df01fd3SThomas Chou 59210df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 59220df01fd3SThomas Chou 59230df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 59240df01fd3SThomas Chou to access small data sections, so gp is free. 59250df01fd3SThomas Chou 5926afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5927afc1ce82SMacpaul Lin 5928afc1ce82SMacpaul Lin R0-R1: argument/return 5929afc1ce82SMacpaul Lin R2-R5: argument 5930afc1ce82SMacpaul Lin R15: temporary register for assembler 5931afc1ce82SMacpaul Lin R16: trampoline register 5932afc1ce82SMacpaul Lin R28: frame pointer (FP) 5933afc1ce82SMacpaul Lin R29: global pointer (GP) 5934afc1ce82SMacpaul Lin R30: link register (LP) 5935afc1ce82SMacpaul Lin R31: stack pointer (SP) 5936afc1ce82SMacpaul Lin PC: program counter (PC) 5937afc1ce82SMacpaul Lin 5938afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5939afc1ce82SMacpaul Lin 5940d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5941d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5942c609719bSwdenk 5943c609719bSwdenkMemory Management: 5944c609719bSwdenk------------------ 5945c609719bSwdenk 5946c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5947c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5948c609719bSwdenk 5949c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5950c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5951c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5952c609719bSwdenkphysical memory banks. 5953c609719bSwdenk 5954c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5955c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5956c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5957c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 59586d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5959c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5960c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5961c609719bSwdenk 5962c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5963c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5964c609719bSwdenk 5965c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5966c609719bSwdenkthis: 5967c609719bSwdenk 5968c609719bSwdenk 0x0000 0000 Exception Vector code 5969c609719bSwdenk : 5970c609719bSwdenk 0x0000 1FFF 5971c609719bSwdenk 0x0000 2000 Free for Application Use 5972c609719bSwdenk : 5973c609719bSwdenk : 5974c609719bSwdenk 5975c609719bSwdenk : 5976c609719bSwdenk : 5977c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5978c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5979c609719bSwdenk 0x00FC 0000 Malloc Arena 5980c609719bSwdenk : 5981c609719bSwdenk 0x00FD FFFF 5982c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5983c609719bSwdenk ... eventually: LCD or video framebuffer 5984c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5985c609719bSwdenk 0x00FF FFFF [End of RAM] 5986c609719bSwdenk 5987c609719bSwdenk 5988c609719bSwdenkSystem Initialization: 5989c609719bSwdenk---------------------- 5990c609719bSwdenk 5991c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 599211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5993c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 59947152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5995c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5996c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5997c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5998c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5999c609719bSwdenkthe caches and the SIU. 6000c609719bSwdenk 6001c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 6002c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 6003c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 6004c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 6005c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 6006c609719bSwdenksimple memory test is run that determines the size of the SDRAM 6007c609719bSwdenkbanks. 6008c609719bSwdenk 6009c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 60107152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 6011c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 6012c609719bSwdenk0x00000000, with any additional banks following immediately to create 6013c609719bSwdenkcontiguous memory starting from 0. 6014c609719bSwdenk 6015c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 6016c609719bSwdenkand allocates memory for use by malloc() and for the global Board 6017c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 6018c609719bSwdenkpages, and the final stack is set up. 6019c609719bSwdenk 6020c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 6021c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 6022c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 6023c609719bSwdenknew address in RAM. 6024c609719bSwdenk 6025c609719bSwdenk 6026c609719bSwdenkU-Boot Porting Guide: 6027c609719bSwdenk---------------------- 6028c609719bSwdenk 6029c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 60306aff3115Swdenklist, October 2002] 6031c609719bSwdenk 6032c609719bSwdenk 6033c609719bSwdenkint main(int argc, char *argv[]) 6034c609719bSwdenk{ 6035c609719bSwdenk sighandler_t no_more_time; 6036c609719bSwdenk 6037c609719bSwdenk signal(SIGALRM, no_more_time); 6038c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6039c609719bSwdenk 6040c609719bSwdenk if (available_money > available_manpower) { 60416c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6042c609719bSwdenk return 0; 6043c609719bSwdenk } 6044c609719bSwdenk 6045c609719bSwdenk Download latest U-Boot source; 6046c609719bSwdenk 60470668236bSWolfgang Denk Subscribe to u-boot mailing list; 60486aff3115Swdenk 60496c3fef28SJerry Van Baren if (clueless) 6050c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6051c609719bSwdenk 6052c609719bSwdenk while (learning) { 6053c609719bSwdenk Read the README file in the top level directory; 60547cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 60556c3fef28SJerry Van Baren Read applicable doc/*.README; 6056c609719bSwdenk Read the source, Luke; 60576c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6058c609719bSwdenk } 6059c609719bSwdenk 60606c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 60616c3fef28SJerry Van Baren Buy a BDI3000; 60626c3fef28SJerry Van Baren else 6063c609719bSwdenk Add a lot of aggravation and time; 6064c609719bSwdenk 60656c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 60666c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 60676c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 60686c3fef28SJerry Van Baren } else { 6069c609719bSwdenk Create your own board support subdirectory; 60706c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 60716c3fef28SJerry Van Baren } 60726c3fef28SJerry Van Baren Edit new board/<myboard> files 60736c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6074c609719bSwdenk 60756c3fef28SJerry Van Baren while (!accepted) { 6076c609719bSwdenk while (!running) { 6077c609719bSwdenk do { 6078c609719bSwdenk Add / modify source code; 6079c609719bSwdenk } until (compiles); 6080c609719bSwdenk Debug; 6081c609719bSwdenk if (clueless) 6082c609719bSwdenk email("Hi, I am having problems..."); 6083c609719bSwdenk } 60846c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 60856c3fef28SJerry Van Baren if (reasonable critiques) 60866c3fef28SJerry Van Baren Incorporate improvements from email list code review; 60876c3fef28SJerry Van Baren else 60886c3fef28SJerry Van Baren Defend code as written; 60896c3fef28SJerry Van Baren } 6090c609719bSwdenk 6091c609719bSwdenk return 0; 6092c609719bSwdenk} 6093c609719bSwdenk 6094c609719bSwdenkvoid no_more_time (int sig) 6095c609719bSwdenk{ 6096c609719bSwdenk hire_a_guru(); 6097c609719bSwdenk} 6098c609719bSwdenk 6099c609719bSwdenk 6100c609719bSwdenkCoding Standards: 6101c609719bSwdenk----------------- 6102c609719bSwdenk 6103c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 61042c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 61057ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6106c609719bSwdenk 61072c051651SDetlev ZundelSource files originating from a different project (for example the 61082c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 61092c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 61102c051651SDetlev Zundelsources. 61112c051651SDetlev Zundel 61122c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 61132c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 61142c051651SDetlev Zundelin your code. 6115c609719bSwdenk 6116c178d3daSwdenkPlease also stick to the following formatting rules: 6117180d3f74Swdenk- remove any trailing white space 61187ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6119180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 61207ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6121180d3f74Swdenk- do not add trailing empty lines to source files 6122180d3f74Swdenk 6123c609719bSwdenkSubmissions which do not conform to the standards may be returned 6124c609719bSwdenkwith a request to reformat the changes. 6125c609719bSwdenk 6126c609719bSwdenk 6127c609719bSwdenkSubmitting Patches: 6128c609719bSwdenk------------------- 6129c609719bSwdenk 6130c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6131c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6132c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6133c609719bSwdenk 61340d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6135218ca724SWolfgang Denk 61360668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 61370668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 61380668236bSWolfgang Denk 6139c609719bSwdenkWhen you send a patch, please include the following information with 6140c609719bSwdenkit: 6141c609719bSwdenk 6142c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6143c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6144c609719bSwdenk patch actually fixes something. 6145c609719bSwdenk 6146c609719bSwdenk* For new features: a description of the feature and your 6147c609719bSwdenk implementation. 6148c609719bSwdenk 6149c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6150c609719bSwdenk 6151c609719bSwdenk* For major contributions, your entry to the CREDITS file 6152c609719bSwdenk 615327af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 615427af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6155c609719bSwdenk 6156c609719bSwdenk* If your patch adds new configuration options, don't forget to 6157c609719bSwdenk document these in the README file. 6158c609719bSwdenk 6159218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6160218ca724SWolfgang Denk recommended) you can easily generate the patch using the 61617ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6162218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6163218ca724SWolfgang Denk with some other mail clients. 6164c609719bSwdenk 6165218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6166218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6167218ca724SWolfgang Denk GNU diff. 61686dff5529Swdenk 6169218ca724SWolfgang Denk The current directory when running this command shall be the parent 6170218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6171218ca724SWolfgang Denk your patch includes sufficient directory information for the 6172218ca724SWolfgang Denk affected files). 6173218ca724SWolfgang Denk 6174218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6175218ca724SWolfgang Denk and compressed attachments must not be used. 6176c609719bSwdenk 617752f52c14Swdenk* If one logical set of modifications affects or creates several 617852f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 617952f52c14Swdenk 618052f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 618152f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 618252f52c14Swdenk 618352f52c14Swdenk 6184c609719bSwdenkNotes: 6185c609719bSwdenk 6186c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6187c609719bSwdenk source tree and make sure that no errors or warnings are reported 6188c609719bSwdenk for any of the boards. 6189c609719bSwdenk 6190c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6191c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6192c609719bSwdenk returned with a request to re-formatting / split it. 6193c609719bSwdenk 6194c609719bSwdenk* If you modify existing code, make sure that your new code does not 6195c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6196c609719bSwdenk When adding new features, these should compile conditionally only 6197c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6198c609719bSwdenk disabled must not need more memory than the old code without your 6199c609719bSwdenk modification. 620090dc6704Swdenk 62010668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 62020668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 62030668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 62040668236bSWolfgang Denk bigger than the size limit should be avoided. 6205