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 267c609719bSwdenkConfiguration Options: 268c609719bSwdenk---------------------- 269c609719bSwdenk 270c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 271c609719bSwdenksuch information is kept in a configuration file 272c609719bSwdenk"include/configs/<board_name>.h". 273c609719bSwdenk 274c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 275c609719bSwdenk"include/configs/TQM823L.h". 276c609719bSwdenk 277c609719bSwdenk 2787f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2797f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2807f6c2cbcSwdenkbuild a config tool - later. 2817f6c2cbcSwdenk 2827f6c2cbcSwdenk 283c609719bSwdenkThe following options need to be configured: 284c609719bSwdenk 2852628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 286c609719bSwdenk 2872628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2886ccec449SWolfgang Denk 2896ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 29009ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 291c609719bSwdenk 292c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 293c609719bSwdenk Define exactly one of 294c609719bSwdenk CONFIG_CMA286_60_OLD 295c609719bSwdenk--- FIXME --- not tested yet: 296c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 297c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 298c609719bSwdenk 299c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 300c609719bSwdenk Define exactly one of 301c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 302c609719bSwdenk 303c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 304c609719bSwdenk Define one or more of 305c609719bSwdenk CONFIG_CMA302 306c609719bSwdenk 307c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 308c609719bSwdenk Define one or more of 309c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 31011ccc33fSMarcel Ziswiler the LCD display every second with 311c609719bSwdenk a "rotator" |\-/|\-/ 312c609719bSwdenk 3132535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3142535d602Swdenk CONFIG_ADSTYPE 3152535d602Swdenk Possible values are: 3166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3202535d602Swdenk 321cf946c6dSLei Wen- Marvell Family Member 322cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 323cf946c6dSLei Wen multiple fs option at one time 324cf946c6dSLei Wen for marvell soc family 325cf946c6dSLei Wen 326c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 327c609719bSwdenk Define exactly one of 328c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 329c609719bSwdenk 33011ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 33166ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 33266ca92a5Swdenk get_gclk_freq() cannot work 3335da627a4Swdenk e.g. if there is no 32KHz 3345da627a4Swdenk reference PIT/RTC clock 33566ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 33666ca92a5Swdenk or XTAL/EXTAL) 337c609719bSwdenk 33866ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 34166ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 34275d1ea7fSwdenk See doc/README.MPC866 34375d1ea7fSwdenk 3446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 34575d1ea7fSwdenk 34675d1ea7fSwdenk Define this to measure the actual CPU clock instead 34775d1ea7fSwdenk of relying on the correctness of the configured 34875d1ea7fSwdenk values. Mostly useful for board bringup to make sure 34975d1ea7fSwdenk the PLL is locked at the intended frequency. Note 35075d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 35275d1ea7fSwdenk 353506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 354506f3918SHeiko Schocher 355506f3918SHeiko Schocher Define this option if you want to enable the 356506f3918SHeiko Schocher ICache only when Code runs from RAM. 357506f3918SHeiko Schocher 35866412c63SKumar Gala- 85xx CPU Options: 359ffd06e02SYork Sun CONFIG_SYS_PPC64 360ffd06e02SYork Sun 361ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 362ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 363ffd06e02SYork Sun compliance, among other possible reasons. 364ffd06e02SYork Sun 36566412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36666412c63SKumar Gala 36766412c63SKumar Gala Defines the core time base clock divider ratio compared to the 36866412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 36966412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37066412c63SKumar Gala 3718f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3728f29084aSKumar Gala 3738f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3748f29084aSKumar Gala tree nodes for the given platform. 3758f29084aSKumar Gala 376afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 377afa6b551SPrabhakar Kushwaha 378afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 379afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 380afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 381afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 382afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 383afa6b551SPrabhakar Kushwaha purpose. 384afa6b551SPrabhakar Kushwaha 38533eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 38633eee330SScott Wood 38733eee330SScott Wood Enables a workaround for erratum A004510. If set, 38833eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 38933eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 39033eee330SScott Wood 39133eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 39233eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 39333eee330SScott Wood 39433eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 39533eee330SScott Wood for which the A004510 workaround should be applied. 39633eee330SScott Wood 39733eee330SScott Wood The rest of SVR is either not relevant to the decision 39833eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 39933eee330SScott Wood p2041) or is implied by the build target, which controls 40033eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 40133eee330SScott Wood 40233eee330SScott Wood See Freescale App Note 4493 for more information about 40333eee330SScott Wood this erratum. 40433eee330SScott Wood 40574fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 40674fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 40774fa22edSPrabhakar Kushwaha requred during NOR boot. 40874fa22edSPrabhakar Kushwaha 40933eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 41033eee330SScott Wood 41133eee330SScott Wood This is the value to write into CCSR offset 0x18600 41233eee330SScott Wood according to the A004510 workaround. 41333eee330SScott Wood 41464501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 41564501c66SPriyanka Jain This value denotes start offset of DDR memory which is 41664501c66SPriyanka Jain connected exclusively to the DSP cores. 41764501c66SPriyanka Jain 418765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 419765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 420765b0bdbSPriyanka Jain which is directly connected to the DSP core. 421765b0bdbSPriyanka Jain 42264501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 42364501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 42464501c66SPriyanka Jain connected to the DSP core. 42564501c66SPriyanka Jain 426765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 427765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 428765b0bdbSPriyanka Jain 429b135991aSPriyanka Jain CONFIG_SYS_FSL_SINGLE_SOURCE_CLK 430b135991aSPriyanka Jain Single Source Clock is clocking mode present in some of FSL SoC's. 431b135991aSPriyanka Jain In this mode, a single differential clock is used to supply 432b135991aSPriyanka Jain clocks to the sysclock, ddrclock and usbclock. 433b135991aSPriyanka Jain 434fb4a2409SAneesh Bansal CONFIG_SYS_CPC_REINIT_F 435fb4a2409SAneesh Bansal This CONFIG is defined when the CPC is configured as SRAM at the 436fb4a2409SAneesh Bansal time of U-boot entry and is required to be re-initialized. 437fb4a2409SAneesh Bansal 438aade2004STang Yuantian CONFIG_DEEP_SLEEP 439aade2004STang Yuantian Inidcates this SoC supports deep sleep feature. If deep sleep is 440aade2004STang Yuantian supported, core will start to execute uboot when wakes up. 441aade2004STang Yuantian 4426cb461b4SDaniel Schwierzeck- Generic CPU options: 4436cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4446cb461b4SDaniel Schwierzeck 4456cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4466cb461b4SDaniel Schwierzeck values is arch specific. 4476cb461b4SDaniel Schwierzeck 4485614e71bSYork Sun CONFIG_SYS_FSL_DDR 4495614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4505614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4515614e71bSYork Sun SoCs. 4525614e71bSYork Sun 4535614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4545614e71bSYork Sun Freescale DDR memory-mapped register base. 4555614e71bSYork Sun 4565614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4575614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4585614e71bSYork Sun deskew training are not available. 4595614e71bSYork Sun 4605614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4615614e71bSYork Sun Freescale DDR1 controller. 4625614e71bSYork Sun 4635614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4645614e71bSYork Sun Freescale DDR2 controller. 4655614e71bSYork Sun 4665614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4675614e71bSYork Sun Freescale DDR3 controller. 4685614e71bSYork Sun 46934e026f9SYork Sun CONFIG_SYS_FSL_DDRC_GEN4 47034e026f9SYork Sun Freescale DDR4 controller. 47134e026f9SYork Sun 4729ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4739ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4749ac4ffbdSYork Sun 4755614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4765614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4775614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4785614e71bSYork Sun implemetation. 4795614e71bSYork Sun 4805614e71bSYork Sun CONFIG_SYS_FSL_DDR2 4815614e71bSYork Sun Board config to use DDR2. It can be eanbeld for SoCs with 4825614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 4835614e71bSYork Sun implementation. 4845614e71bSYork Sun 4855614e71bSYork Sun CONFIG_SYS_FSL_DDR3 4865614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 48734e026f9SYork Sun Freescale DDR3 or DDR3L controllers. 48834e026f9SYork Sun 48934e026f9SYork Sun CONFIG_SYS_FSL_DDR3L 49034e026f9SYork Sun Board config to use DDR3L. It can be enabled for SoCs with 49134e026f9SYork Sun DDR3L controllers. 49234e026f9SYork Sun 49334e026f9SYork Sun CONFIG_SYS_FSL_DDR4 49434e026f9SYork Sun Board config to use DDR4. It can be enabled for SoCs with 49534e026f9SYork Sun DDR4 controllers. 4965614e71bSYork Sun 4971b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 4981b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 4991b4175d6SPrabhakar Kushwaha 5001b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 5011b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 5021b4175d6SPrabhakar Kushwaha 503690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 504690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 505690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 506690e4258SPrabhakar Kushwaha 507690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 508690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 509690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 510690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 511690e4258SPrabhakar Kushwaha 51289ad7be8SPrabhakar Kushwaha CONFIG_SPL_FSL_PBL 51389ad7be8SPrabhakar Kushwaha It adds a target to create boot binary having SPL binary in PBI format 51489ad7be8SPrabhakar Kushwaha concatenated with u-boot binary. 51589ad7be8SPrabhakar Kushwaha 5164e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 5174e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 5184e5b1bd0SYork Sun 5194e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 5204e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 5214e5b1bd0SYork Sun 5226b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 5236b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 5246b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 5256b9e309aSYork Sun it could be different for ARM SoCs. 5266b9e309aSYork Sun 5276b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5286b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5296b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5306b1e1254SYork Sun SoCs with ARM core. 5316b1e1254SYork Sun 5320b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5340b953ffcSMarkus Klotzbuecher 5350b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5360b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5370b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5380b953ffcSMarkus Klotzbuecher 5396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5400b953ffcSMarkus Klotzbuecher 5410b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5420b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5430b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5440b953ffcSMarkus Klotzbuecher by this value. 5450b953ffcSMarkus Klotzbuecher 54692bbd64eSDaniel Schwierzeck- MIPS CPU options: 54792bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 54892bbd64eSDaniel Schwierzeck 54992bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 55092bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 55192bbd64eSDaniel Schwierzeck relocation. 55292bbd64eSDaniel Schwierzeck 55392bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 55492bbd64eSDaniel Schwierzeck 55592bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 55692bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 55792bbd64eSDaniel Schwierzeck Possible values are: 55892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 55992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 56092bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 56192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 56292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 56392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 56492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 56592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 56692bbd64eSDaniel Schwierzeck 56792bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 56892bbd64eSDaniel Schwierzeck 56992bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 57092bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 57192bbd64eSDaniel Schwierzeck 57292bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 57392bbd64eSDaniel Schwierzeck 57492bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 57592bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 57692bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 57792bbd64eSDaniel Schwierzeck 578b67d8816SChristian Riesch- ARM options: 579b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 580b67d8816SChristian Riesch 581b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 582b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 583b67d8816SChristian Riesch 5845356f545SAneesh V CONFIG_SYS_THUMB_BUILD 5855356f545SAneesh V 5865356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 5875356f545SAneesh V set for ARM architectures. Thumb instruction set provides 5885356f545SAneesh V better code density. For ARM architectures that support 5895356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 5905356f545SAneesh V GCC. 5915356f545SAneesh V 592c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 5930678587fSStephen Warren CONFIG_ARM_ERRATA_742230 5940678587fSStephen Warren CONFIG_ARM_ERRATA_743622 5950678587fSStephen Warren CONFIG_ARM_ERRATA_751472 596f71cbfe3SNitin Garg CONFIG_ARM_ERRATA_794072 597b7588e3bSNitin Garg CONFIG_ARM_ERRATA_761320 5980678587fSStephen Warren 5990678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 6000678587fSStephen Warren during U-Boot startup. Note that these options force the 6010678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 6020678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 6030678587fSStephen Warren set these options unless they apply! 6040678587fSStephen Warren 605795659dcSStephen Warren- CPU timer options: 606795659dcSStephen Warren CONFIG_SYS_HZ 607795659dcSStephen Warren 608795659dcSStephen Warren The frequency of the timer returned by get_timer(). 609795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 610795659dcSStephen Warren option must be set to 1000. 611795659dcSStephen Warren 6125da627a4Swdenk- Linux Kernel Interface: 613c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 614c609719bSwdenk 615c609719bSwdenk U-Boot stores all clock information in Hz 616c609719bSwdenk internally. For binary compatibility with older Linux 617c609719bSwdenk kernels (which expect the clocks passed in the 618c609719bSwdenk bd_info data to be in MHz) the environment variable 619c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 620c609719bSwdenk converts clock data to MHZ before passing it to the 621c609719bSwdenk Linux kernel. 622c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 623c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 624c609719bSwdenk default environment. 625c609719bSwdenk 6265da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6275da627a4Swdenk 62811ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6295da627a4Swdenk expect it to be in bytes, others in MB. 6305da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6315da627a4Swdenk 632fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 633f57f70aaSWolfgang Denk 634f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 635213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 636213bf8c8SGerald Van Baren concepts). 637213bf8c8SGerald Van Baren 638213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 639213bf8c8SGerald Van Baren * New libfdt-based support 640213bf8c8SGerald Van Baren * Adds the "fdt" command 6413bb342fcSKim Phillips * The bootm command automatically updates the fdt 642213bf8c8SGerald Van Baren 643b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 644b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 645b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 646b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 647f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 648c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 649f57f70aaSWolfgang Denk 65011ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 65111ccc33fSMarcel Ziswiler addresses 6523bb342fcSKim Phillips 6534e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6544e253137SKumar Gala 6554e253137SKumar Gala Board code has addition modification that it wants to make 6564e253137SKumar Gala to the flat device tree before handing it off to the kernel 6576705d81eSwdenk 6580267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6590267768eSMatthew McClintock 66011ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6610267768eSMatthew McClintock param header, the default value is zero if undefined. 6620267768eSMatthew McClintock 6633887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6643887c3fbSHeiko Schocher 6653887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6663887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6673887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6683887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6693887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6703887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6713887c3fbSHeiko Schocher 6727eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6737eb29398SIgor Grinberg 6747eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6757eb29398SIgor Grinberg machine type and must be used to specify the machine type 6767eb29398SIgor Grinberg number as it appears in the ARM machine registry 6777eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6787eb29398SIgor Grinberg Only boards that have multiple machine types supported 6797eb29398SIgor Grinberg in a single configuration file and the machine type is 6807eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6817eb29398SIgor Grinberg 6820b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6830b2f4ecaSNiklaus Giger 6840b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6850b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 6860b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6870b2f4ecaSNiklaus Giger 6880b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 6890b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 6900b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 6910b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 6920b2f4ecaSNiklaus Giger 6930b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 6940b2f4ecaSNiklaus Giger 6950b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 6960b2f4ecaSNiklaus Giger 6970b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 6980b2f4ecaSNiklaus Giger the defaults discussed just above. 6990b2f4ecaSNiklaus Giger 7002c451f78SAneesh V- Cache Configuration: 7012c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 7022c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 7032c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 7042c451f78SAneesh V 70593bc2193SAneesh V- Cache Configuration for ARM: 70693bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 70793bc2193SAneesh V controller 70893bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 70993bc2193SAneesh V controller register space 71093bc2193SAneesh V 7116705d81eSwdenk- Serial Ports: 71248d0192fSAndreas Engel CONFIG_PL010_SERIAL 7136705d81eSwdenk 7146705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 7156705d81eSwdenk 71648d0192fSAndreas Engel CONFIG_PL011_SERIAL 7176705d81eSwdenk 7186705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 7196705d81eSwdenk 7206705d81eSwdenk CONFIG_PL011_CLOCK 7216705d81eSwdenk 7226705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 7236705d81eSwdenk the clock speed of the UARTs. 7246705d81eSwdenk 7256705d81eSwdenk CONFIG_PL01x_PORTS 7266705d81eSwdenk 7276705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 7286705d81eSwdenk define this to a list of base addresses for each (supported) 7296705d81eSwdenk port. See e.g. include/configs/versatile.h 7306705d81eSwdenk 731910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 732910f1ae3SJohn Rigby 733910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 734910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 735910f1ae3SJohn Rigby this variable to initialize the extra register. 736910f1ae3SJohn Rigby 737910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 738910f1ae3SJohn Rigby 739910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 740910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 741910f1ae3SJohn Rigby variable to flush the UART at init time. 742910f1ae3SJohn Rigby 7436705d81eSwdenk 744c609719bSwdenk- Console Interface: 745c609719bSwdenk Depending on board, define exactly one serial port 746c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 747c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 748c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 749c609719bSwdenk 750c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 751c609719bSwdenk port routines must be defined elsewhere 752c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 753c609719bSwdenk 754c609719bSwdenk CONFIG_CFB_CONSOLE 755c609719bSwdenk Enables console device for a color framebuffer. Needs following 756c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 757c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 758c609719bSwdenk (default big endian) 759c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 760c609719bSwdenk rectangle fill 761c609719bSwdenk (cf. smiLynxEM) 762c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 763c609719bSwdenk bit-blit (cf. smiLynxEM) 764c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 765c609719bSwdenk (cols=pitch) 766c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 767c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 768c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 769c609719bSwdenk (0-5, cf. cfb_console.c) 770c609719bSwdenk VIDEO_FB_ADRS framebuffer address 771c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 772c609719bSwdenk (i.e. i8042_kbd_init()) 773c609719bSwdenk VIDEO_TSTC_FCT test char fct 774c609719bSwdenk (i.e. i8042_tstc) 775c609719bSwdenk VIDEO_GETC_FCT get char fct 776c609719bSwdenk (i.e. i8042_getc) 777c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 778c609719bSwdenk (requires blink timer 779c609719bSwdenk cf. i8042.c) 7806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 781c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 782c609719bSwdenk upper right corner 783602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 784c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 785c609719bSwdenk upper left corner 786a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 787a6c7ad2fSwdenk linux_logo.h for logo. 788a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 789c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 79011ccc33fSMarcel Ziswiler additional board info beside 791c609719bSwdenk the logo 792c609719bSwdenk 79333a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 79433a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 79533a35bbbSPali Rohár erase functions and limited graphics rendition control). 79633a35bbbSPali Rohár 797c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 798c609719bSwdenk default i/o. Serial console can be forced with 799c609719bSwdenk environment 'console=serial'. 800c609719bSwdenk 801a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 802a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 803a3ad8e26Swdenk the "silent" environment variable. See 804a3ad8e26Swdenk doc/README.silent for more information. 805a3ad8e26Swdenk 80645ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 80745ae2546SHeiko Schocher is 0x00. 80845ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 80945ae2546SHeiko Schocher is 0xa0. 81045ae2546SHeiko Schocher 811c609719bSwdenk- Console Baudrate: 812c609719bSwdenk CONFIG_BAUDRATE - in bps 813c609719bSwdenk Select one of the baudrates listed in 8146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 8156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 816c609719bSwdenk 817c92fac91SHeiko Schocher- Console Rx buffer length 818c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 819c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 8202b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 821c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 822c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 823c92fac91SHeiko Schocher the SMC. 824c92fac91SHeiko Schocher 8259558b48aSGraeme Russ- Pre-Console Buffer: 8269558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 8279558b48aSGraeme Russ initialised etc) all console output is silently discarded. 8289558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8299558b48aSGraeme Russ buffer any console messages prior to the console being 8309558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8319558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8329558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8339558b48aSGraeme Russ bytes are output before the console is initialised, the 8349558b48aSGraeme Russ earlier bytes are discarded. 8359558b48aSGraeme Russ 8369558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8379558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8389558b48aSGraeme Russ 839046a37bdSSonny Rao- Safe printf() functions 840046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 841046a37bdSSonny Rao the printf() functions. These are defined in 842046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 843046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 844046a37bdSSonny Rao If this option is not given then these functions will 845046a37bdSSonny Rao silently discard their buffer size argument - this means 846046a37bdSSonny Rao you are not getting any overflow checking in this case. 847046a37bdSSonny Rao 848c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 849c609719bSwdenk Delay before automatically booting the default image; 850c609719bSwdenk set to -1 to disable autoboot. 85193d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 85293d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 853c609719bSwdenk 854c609719bSwdenk See doc/README.autoboot for these options that 855c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 856c609719bSwdenk CONFIG_BOOT_RETRY_TIME 857c609719bSwdenk CONFIG_BOOT_RETRY_MIN 858c609719bSwdenk CONFIG_AUTOBOOT_KEYED 859c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 860c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 861c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 862c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 863c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 864c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 865c609719bSwdenk CONFIG_RESET_TO_RETRY 866c609719bSwdenk 867c609719bSwdenk- Autoboot Command: 868c609719bSwdenk CONFIG_BOOTCOMMAND 869c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 870c609719bSwdenk define a command string that is automatically executed 871c609719bSwdenk when no character is read on the console interface 872c609719bSwdenk within "Boot Delay" after reset. 873c609719bSwdenk 874c609719bSwdenk CONFIG_BOOTARGS 875c609719bSwdenk This can be used to pass arguments to the bootm 876c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 877c609719bSwdenk environment value "bootargs". 878c609719bSwdenk 879c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 880c609719bSwdenk The value of these goes into the environment as 881c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 882c609719bSwdenk as a convenience, when switching between booting from 88311ccc33fSMarcel Ziswiler RAM and NFS. 884c609719bSwdenk 885eda0ba38SHeiko Schocher- Bootcount: 886eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 887eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 888eda0ba38SHeiko Schocher cycle, see: 889eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 890eda0ba38SHeiko Schocher 891eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 892eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 893eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 894eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 895eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 896eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 897eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 898eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 899eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 900eda0ba38SHeiko Schocher 901c609719bSwdenk- Pre-Boot Commands: 902c609719bSwdenk CONFIG_PREBOOT 903c609719bSwdenk 904c609719bSwdenk When this option is #defined, the existence of the 905c609719bSwdenk environment variable "preboot" will be checked 906c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 907c609719bSwdenk countdown and/or running the auto-boot command resp. 908c609719bSwdenk entering interactive mode. 909c609719bSwdenk 910c609719bSwdenk This feature is especially useful when "preboot" is 911c609719bSwdenk automatically generated or modified. For an example 912c609719bSwdenk see the LWMON board specific code: here "preboot" is 913c609719bSwdenk modified when the user holds down a certain 914c609719bSwdenk combination of keys on the (special) keyboard when 915c609719bSwdenk booting the systems 916c609719bSwdenk 917c609719bSwdenk- Serial Download Echo Mode: 918c609719bSwdenk CONFIG_LOADS_ECHO 919c609719bSwdenk If defined to 1, all characters received during a 920c609719bSwdenk serial download (using the "loads" command) are 921c609719bSwdenk echoed back. This might be needed by some terminal 922c609719bSwdenk emulations (like "cu"), but may as well just take 923c609719bSwdenk time on others. This setting #define's the initial 924c609719bSwdenk value of the "loads_echo" environment variable. 925c609719bSwdenk 926602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 927c609719bSwdenk CONFIG_KGDB_BAUDRATE 928c609719bSwdenk Select one of the baudrates listed in 9296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 930c609719bSwdenk 931c609719bSwdenk- Monitor Functions: 932602ad3b3SJon Loeliger Monitor commands can be included or excluded 933602ad3b3SJon Loeliger from the build by using the #include files 934c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 935c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 936602ad3b3SJon Loeliger and augmenting with additional #define's 937602ad3b3SJon Loeliger for wanted commands. 938c609719bSwdenk 939602ad3b3SJon Loeliger The default command configuration includes all commands 940602ad3b3SJon Loeliger except those marked below with a "*". 941602ad3b3SJon Loeliger 942b401b73dSMarek Vasut CONFIG_CMD_AES AES 128 CBC encrypt/decrypt 943602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 944602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 945602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 946602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 947602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 948602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 949602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 95008d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 951602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 952710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 953602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 954602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 955602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 956a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 957a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 958a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 959a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 960602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 961602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 962246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 963602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 964602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9655e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 966fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 96788733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9680c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 96903e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 97003e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 97116f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 97216f4d933SStephen Warren that work for multiple fs types 973bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 974602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 97503e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 976602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 977602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9784d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 97953fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 980a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 981a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 982bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 983602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 984602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 985602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 986602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 9878fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 9884d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 989602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 9900c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 991c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 992602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 993602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 994602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 995602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 9964d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 997d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 998d22c338eSJoe Hershberger (169.254.*.*) 999602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 1000602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 10014d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 100202c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 100315a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1004602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1005a2681707SWolfgang Denk loop, loopw 10064d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1007602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1008602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1009602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 101068d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1011602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1012602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10134d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1014e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1015e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1016602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1017602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1018602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1019602ad3b3SJon Loeliger host 1020602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1021ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1022602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1023602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1024d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1025602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1026602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1027602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1028602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1029602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1030602ad3b3SJon Loeliger (4xx only) 1031f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10324d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 103302c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10347d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 103574de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1036602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10377a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10381fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1039da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1040da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1041602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1042602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1043c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10444d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 104589c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1046c609719bSwdenk 1047c609719bSwdenk EXAMPLE: If you want all functions except of network 1048c609719bSwdenk support you can write: 1049c609719bSwdenk 1050602ad3b3SJon Loeliger #include "config_cmd_all.h" 1051602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1052c609719bSwdenk 1053213bf8c8SGerald Van Baren Other Commands: 1054213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1055c609719bSwdenk 1056c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1057602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1058c609719bSwdenk what you (and your U-Boot users) are doing. Data 1059c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1060c609719bSwdenk 8260 (where accesses to the IMMR region must be 1061c609719bSwdenk uncached), and it cannot be disabled on all other 1062c609719bSwdenk systems where we (mis-) use the data cache to hold an 1063c609719bSwdenk initial stack and some data. 1064c609719bSwdenk 1065c609719bSwdenk 1066c609719bSwdenk XXX - this list needs to get updated! 1067c609719bSwdenk 1068a5ecbe62SWolfgang Denk- Regular expression support: 1069a5ecbe62SWolfgang Denk CONFIG_REGEX 1070a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1071a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1072a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1073a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1074a5ecbe62SWolfgang Denk 107545ba8077SSimon Glass- Device tree: 107645ba8077SSimon Glass CONFIG_OF_CONTROL 107745ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 107845ba8077SSimon Glass to configure its devices, instead of relying on statically 107945ba8077SSimon Glass compiled #defines in the board file. This option is 108045ba8077SSimon Glass experimental and only available on a few boards. The device 108145ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 108245ba8077SSimon Glass 10832c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10842c0f79e4SSimon Glass be done using one of the two options below: 1085bbb0b128SSimon Glass 1086bbb0b128SSimon Glass CONFIG_OF_EMBED 1087bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1088bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1089bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1090bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1091bbb0b128SSimon Glass the global data structure as gd->blob. 109245ba8077SSimon Glass 10932c0f79e4SSimon Glass CONFIG_OF_SEPARATE 10942c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 10952c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 10962c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 10972c0f79e4SSimon Glass 10982c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 10992c0f79e4SSimon Glass 11002c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 11012c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 11022c0f79e4SSimon Glass still use the individual files if you need something more 11032c0f79e4SSimon Glass exotic. 11042c0f79e4SSimon Glass 1105c609719bSwdenk- Watchdog: 1106c609719bSwdenk CONFIG_WATCHDOG 1107c609719bSwdenk If this variable is defined, it enables watchdog 11086abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11096abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11106abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11116abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11126abe6fb6SDetlev Zundel available, then no further board specific code should 11136abe6fb6SDetlev Zundel be needed to use it. 11146abe6fb6SDetlev Zundel 11156abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11166abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11176abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11186abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1119c609719bSwdenk 1120c1551ea8Sstroese- U-Boot Version: 1121c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1122c1551ea8Sstroese If this variable is defined, an environment variable 1123c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1124c1551ea8Sstroese version as printed by the "version" command. 1125a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1126a1ea8e51SBenoît Thébaudeau next reset. 1127c1551ea8Sstroese 1128c609719bSwdenk- Real-Time Clock: 1129c609719bSwdenk 1130602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1131c609719bSwdenk has to be selected, too. Define exactly one of the 1132c609719bSwdenk following options: 1133c609719bSwdenk 1134c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1135c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11364e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1137c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11381cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1139c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11407f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 11413bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11429536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11434c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 114571d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 114671d19f30SHeiko Schocher RV3029 RTC. 1147c609719bSwdenk 1148b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1149b37c7e5eSwdenk must also be configured. See I2C Support, below. 1150b37c7e5eSwdenk 1151e92739d3SPeter Tyser- GPIO Support: 1152e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1153e92739d3SPeter Tyser 11545dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11555dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11565dec49caSChris Packham pins supported by a particular chip. 11575dec49caSChris Packham 1158e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1159e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1160e92739d3SPeter Tyser 1161c609719bSwdenk- Timestamp Support: 1162c609719bSwdenk 1163c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1164c609719bSwdenk (date and time) of an image is printed by image 1165c609719bSwdenk commands like bootm or iminfo. This option is 1166602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1167c609719bSwdenk 1168923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1169923c46f9SKarl O. Pinc Zero or more of the following: 1170923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1171923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1172923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1173923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1174923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1175923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1176923c46f9SKarl O. Pinc disk/part_efi.c 1177923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1178c609719bSwdenk 1179602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1180218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1181923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1182c609719bSwdenk 1183c609719bSwdenk- IDE Reset method: 11844d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 11854d13cbadSwdenk board configurations files but used nowhere! 1186c609719bSwdenk 11874d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 11884d13cbadSwdenk be performed by calling the function 11894d13cbadSwdenk ide_set_reset(int reset) 11904d13cbadSwdenk which has to be defined in a board specific file 1191c609719bSwdenk 1192c609719bSwdenk- ATAPI Support: 1193c609719bSwdenk CONFIG_ATAPI 1194c609719bSwdenk 1195c609719bSwdenk Set this to enable ATAPI support. 1196c609719bSwdenk 1197c40b2956Swdenk- LBA48 Support 1198c40b2956Swdenk CONFIG_LBA48 1199c40b2956Swdenk 1200c40b2956Swdenk Set this to enable support for disks larger than 137GB 12014b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1202c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1203c40b2956Swdenk support disks up to 2.1TB. 1204c40b2956Swdenk 12056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1206c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1207c40b2956Swdenk Default is 32bit. 1208c40b2956Swdenk 1209c609719bSwdenk- SCSI Support: 1210c609719bSwdenk At the moment only there is only support for the 1211c609719bSwdenk SYM53C8XX SCSI controller; define 1212c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1213c609719bSwdenk 12146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1217c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1218c609719bSwdenk devices. 12196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1220c609719bSwdenk 1221447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1222447c031bSStefan Reinauer SCSI devices found during the last scan. 1223447c031bSStefan Reinauer 1224c609719bSwdenk- NETWORK Support (PCI): 1225682011ffSwdenk CONFIG_E1000 1226ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1227ce5207e1SKyle Moffett 1228ce5207e1SKyle Moffett CONFIG_E1000_SPI 1229ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1230ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1231ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1232ce5207e1SKyle Moffett 1233ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1234ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1235ce5207e1SKyle Moffett example with the "sspi" command. 1236ce5207e1SKyle Moffett 1237ce5207e1SKyle Moffett CONFIG_CMD_E1000 1238ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1239ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1240682011ffSwdenk 1241ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 124211ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1243ac3315c2SAndre Schwarz 1244c609719bSwdenk CONFIG_EEPRO100 1245c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 124611ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1247c609719bSwdenk write routine for first time initialisation. 1248c609719bSwdenk 1249c609719bSwdenk CONFIG_TULIP 1250c609719bSwdenk Support for Digital 2114x chips. 1251c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1252c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1253c609719bSwdenk 1254c609719bSwdenk CONFIG_NATSEMI 1255c609719bSwdenk Support for National dp83815 chips. 1256c609719bSwdenk 1257c609719bSwdenk CONFIG_NS8382X 1258c609719bSwdenk Support for National dp8382[01] gigabit chips. 1259c609719bSwdenk 126045219c46Swdenk- NETWORK Support (other): 126145219c46Swdenk 1262c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1263c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1264c041e9d2SJens Scharsig 1265c041e9d2SJens Scharsig CONFIG_RMII 1266c041e9d2SJens Scharsig Define this to use reduced MII inteface 1267c041e9d2SJens Scharsig 1268c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1269c041e9d2SJens Scharsig If this defined, the driver is quiet. 1270c041e9d2SJens Scharsig The driver doen't show link status messages. 1271c041e9d2SJens Scharsig 1272efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1273efdd7319SRob Herring Support for the Calxeda XGMAC device 1274efdd7319SRob Herring 12753bb46d23SAshok CONFIG_LAN91C96 127645219c46Swdenk Support for SMSC's LAN91C96 chips. 127745219c46Swdenk 127845219c46Swdenk CONFIG_LAN91C96_BASE 127945219c46Swdenk Define this to hold the physical address 128045219c46Swdenk of the LAN91C96's I/O space 128145219c46Swdenk 128245219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 128345219c46Swdenk Define this to enable 32 bit addressing 128445219c46Swdenk 12853bb46d23SAshok CONFIG_SMC91111 1286f39748aeSwdenk Support for SMSC's LAN91C111 chip 1287f39748aeSwdenk 1288f39748aeSwdenk CONFIG_SMC91111_BASE 1289f39748aeSwdenk Define this to hold the physical address 1290f39748aeSwdenk of the device (I/O space) 1291f39748aeSwdenk 1292f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1293f39748aeSwdenk Define this if data bus is 32 bits 1294f39748aeSwdenk 1295f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1296f39748aeSwdenk Define this to use i/o functions instead of macros 1297f39748aeSwdenk (some hardware wont work with macros) 1298f39748aeSwdenk 1299dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1300dc02badaSHeiko Schocher Support for davinci emac 1301dc02badaSHeiko Schocher 1302dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1303dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1304dc02badaSHeiko Schocher 1305b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1306b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1307b3dbf4a5SMacpaul Lin 1308b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1309b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1310b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1311b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1312b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1313b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1314b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1315b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1316b3dbf4a5SMacpaul Lin 1317c2fff331SMike Rapoport CONFIG_SMC911X 1318557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1319557b377dSJens Gehrlein 1320c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1321557b377dSJens Gehrlein Define this to hold the physical address 1322557b377dSJens Gehrlein of the device (I/O space) 1323557b377dSJens Gehrlein 1324c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1325557b377dSJens Gehrlein Define this if data bus is 32 bits 1326557b377dSJens Gehrlein 1327c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1328557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1329557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1330c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1331557b377dSJens Gehrlein 13323d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13333d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13343d0075faSYoshihiro Shimoda 13353d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13363d0075faSYoshihiro Shimoda Define the number of ports to be used 13373d0075faSYoshihiro Shimoda 13383d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13393d0075faSYoshihiro Shimoda Define the ETH PHY's address 13403d0075faSYoshihiro Shimoda 134168260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 134268260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 134368260aabSYoshihiro Shimoda 13445e124724SVadim Bendebury- TPM Support: 134590899cc0SChe-liang Chiou CONFIG_TPM 134690899cc0SChe-liang Chiou Support TPM devices. 134790899cc0SChe-liang Chiou 13481b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13491b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13501b393db5STom Wai-Hong Tam per system is supported at this time. 13511b393db5STom Wai-Hong Tam 13521b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13531b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13541b393db5STom Wai-Hong Tam 13551b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13561b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13571b393db5STom Wai-Hong Tam 13581b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13591b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13601b393db5STom Wai-Hong Tam 1361c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1362c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1363c01939c7SDirk Eibach 136490899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 13655e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 13665e124724SVadim Bendebury per system is supported at this time. 13675e124724SVadim Bendebury 13685e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 13695e124724SVadim Bendebury Base address where the generic TPM device is mapped 13705e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 13715e124724SVadim Bendebury 0xfed40000. 13725e124724SVadim Bendebury 1373be6c1529SReinhard Pfau CONFIG_CMD_TPM 1374be6c1529SReinhard Pfau Add tpm monitor functions. 1375be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1376be6c1529SReinhard Pfau provides monitor access to authorized functions. 1377be6c1529SReinhard Pfau 1378be6c1529SReinhard Pfau CONFIG_TPM 1379be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1380be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1381be6c1529SReinhard Pfau Requires support for a TPM device. 1382be6c1529SReinhard Pfau 1383be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1384be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1385be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1386be6c1529SReinhard Pfau 1387c609719bSwdenk- USB Support: 1388c609719bSwdenk At the moment only the UHCI host controller is 13894d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1390c609719bSwdenk CONFIG_USB_UHCI to enable it. 1391c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 139230d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1393c609719bSwdenk storage devices. 1394c609719bSwdenk Note: 1395c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1396c609719bSwdenk (TEAC FD-05PUB). 13974d13cbadSwdenk MPC5200 USB requires additional defines: 13984d13cbadSwdenk CONFIG_USB_CLOCK 13994d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1400307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1401307ecb6dSEric Millbrandt for USB on PSC3 14024d13cbadSwdenk CONFIG_USB_CONFIG 14034d13cbadSwdenk for differential drivers: 0x00001000 14044d13cbadSwdenk for single ended drivers: 0x00005000 1405307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1406307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1408fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1409fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14104d13cbadSwdenk 14119ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14129ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14139ab4ce22SSimon Glass 1414aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1415aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1416aa155058SKuo-Jung Su 141716c8d5e7SWolfgang Denk- USB Device: 141816c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 141916c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 142016c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 142111ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 142216c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 142316c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 142416c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 142516c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 142616c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 142716c8d5e7SWolfgang Denk a Linux host by 142816c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 142916c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 143016c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 143116c8d5e7SWolfgang Denk might be defined in YourBoardName.h 143216c8d5e7SWolfgang Denk 143316c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 143416c8d5e7SWolfgang Denk Define this to build a UDC device 143516c8d5e7SWolfgang Denk 143616c8d5e7SWolfgang Denk CONFIG_USB_TTY 143716c8d5e7SWolfgang Denk Define this to have a tty type of device available to 143816c8d5e7SWolfgang Denk talk to the UDC device 143916c8d5e7SWolfgang Denk 1440f9da0f89SVipin KUMAR CONFIG_USBD_HS 1441f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1442f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1443f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1444f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1445f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1446f9da0f89SVipin KUMAR speed. 1447f9da0f89SVipin KUMAR 14486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 144916c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 145016c8d5e7SWolfgang Denk be set to usbtty. 145116c8d5e7SWolfgang Denk 145216c8d5e7SWolfgang Denk mpc8xx: 14536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 145416c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 145616c8d5e7SWolfgang Denk 14576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 145816c8d5e7SWolfgang Denk Derive USB clock from brgclk 14596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 146016c8d5e7SWolfgang Denk 146116c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 146216c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 146316c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 146416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 146516c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 146616c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 146716c8d5e7SWolfgang Denk 146816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 146916c8d5e7SWolfgang Denk Define this string as the name of your company for 147016c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 147116c8d5e7SWolfgang Denk 147216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 147316c8d5e7SWolfgang Denk Define this string as the name of your product 147416c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 147516c8d5e7SWolfgang Denk 147616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 147716c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 147816c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 147916c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 148016c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 148116c8d5e7SWolfgang Denk 148216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 148316c8d5e7SWolfgang Denk Define this as the unique Product ID 148416c8d5e7SWolfgang Denk for your device 148516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1486c609719bSwdenk 1487d70a560fSIgor Grinberg- ULPI Layer Support: 1488d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1489d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1490d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1491d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1492d70a560fSIgor Grinberg viewport is supported. 1493d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1494d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 14956d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 14966d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 14976d365ea0SLucas Stach the appropriate value in Hz. 1498c609719bSwdenk 1499c609719bSwdenk- MMC Support: 1500c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1501c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1502c609719bSwdenk accessed from the boot prompt by mapping the device 1503c609719bSwdenk to physical memory similar to flash. Command line is 1504602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1505602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1506c609719bSwdenk 1507afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1508afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1509afb35666SYoshihiro Shimoda 1510afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1511afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1512afb35666SYoshihiro Shimoda 1513afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1514afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1515afb35666SYoshihiro Shimoda 1516b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1517b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1518b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1519b3ba6e94STom Rini 1520b3ba6e94STom Rini CONFIG_CMD_DFU 1521b3ba6e94STom Rini This enables the command "dfu" which is used to have 1522b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1523b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1524b3ba6e94STom Rini set and define the alt settings to expose to the host. 1525b3ba6e94STom Rini 1526b3ba6e94STom Rini CONFIG_DFU_MMC 1527b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1528b3ba6e94STom Rini 1529c6631764SPantelis Antoniou CONFIG_DFU_NAND 1530c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1531c6631764SPantelis Antoniou 1532a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1533a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1534a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1535a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1536a9479f04SAfzal Mohammed one that would help mostly the developer. 1537a9479f04SAfzal Mohammed 1538e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1539e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1540e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1541e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1542e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1543e7e75c70SHeiko Schocher 1544ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1545ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1546ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1547ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1548ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1549ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1550ea2453d5SPantelis Antoniou 1551001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1552001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1553001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1554001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1555001a8319SHeiko Schocher 1556001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1557001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1558001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1559001a8319SHeiko Schocher sending again an USB request to the device. 1560001a8319SHeiko Schocher 1561*3aab70afSSebastian Siewior- USB Device Android Fastboot support: 1562*3aab70afSSebastian Siewior CONFIG_CMD_FASTBOOT 1563*3aab70afSSebastian Siewior This enables the command "fastboot" which enables the Android 1564*3aab70afSSebastian Siewior fastboot mode for the platform's USB device. Fastboot is a USB 1565*3aab70afSSebastian Siewior protocol for downloading images, flashing and device control 1566*3aab70afSSebastian Siewior used on Android devices. 1567*3aab70afSSebastian Siewior See doc/README.android-fastboot for more information. 1568*3aab70afSSebastian Siewior 1569*3aab70afSSebastian Siewior CONFIG_ANDROID_BOOT_IMAGE 1570*3aab70afSSebastian Siewior This enables support for booting images which use the Android 1571*3aab70afSSebastian Siewior image format header. 1572*3aab70afSSebastian Siewior 1573*3aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_ADDR 1574*3aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 1575*3aab70afSSebastian Siewior downloads. Define this to the starting RAM address to use for 1576*3aab70afSSebastian Siewior downloaded images. 1577*3aab70afSSebastian Siewior 1578*3aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_SIZE 1579*3aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 1580*3aab70afSSebastian Siewior downloads. This buffer should be as large as possible for a 1581*3aab70afSSebastian Siewior platform. Define this to the size available RAM for fastboot. 1582*3aab70afSSebastian Siewior 15836705d81eSwdenk- Journaling Flash filesystem support: 15846705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 15856705d81eSwdenk CONFIG_JFFS2_NAND_DEV 15866705d81eSwdenk Define these for a default partition on a NAND device 15876705d81eSwdenk 15886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 15896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 15906705d81eSwdenk Define these for a default partition on a NOR device 15916705d81eSwdenk 15926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 15936705d81eSwdenk Define this to create an own partition. You have to provide a 15946705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 15956705d81eSwdenk 15966705d81eSwdenk If you define only one JFFS2 partition you may also want to 15976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 15986705d81eSwdenk to disable the command chpart. This is the default when you 15996705d81eSwdenk have not defined a custom partition 16006705d81eSwdenk 1601c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1602c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1603656f4c65SDonggeun Kim 1604656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1605656f4c65SDonggeun Kim file in FAT formatted partition. 1606656f4c65SDonggeun Kim 1607656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1608656f4c65SDonggeun Kim user to write files to FAT. 1609c30a15e5SDonggeun Kim 161084cd9327SGabe BlackCBFS (Coreboot Filesystem) support 161184cd9327SGabe Black CONFIG_CMD_CBFS 161284cd9327SGabe Black 161384cd9327SGabe Black Define this to enable support for reading from a Coreboot 161484cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 161584cd9327SGabe Black and cbfsload. 161684cd9327SGabe Black 1617c609719bSwdenk- Keyboard Support: 1618c609719bSwdenk CONFIG_ISA_KEYBOARD 1619c609719bSwdenk 1620c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1621c609719bSwdenk support 1622c609719bSwdenk 1623c609719bSwdenk CONFIG_I8042_KBD 1624c609719bSwdenk Standard PC keyboard driver with US (is default) and 1625c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1626c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1627c609719bSwdenk for cfb_console. Supports cursor blinking. 1628c609719bSwdenk 1629713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1630713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1631713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1632713cb680SHung-ying Tyan which provides key scans on request. 1633713cb680SHung-ying Tyan 1634c609719bSwdenk- Video support: 1635c609719bSwdenk CONFIG_VIDEO 1636c609719bSwdenk 1637c609719bSwdenk Define this to enable video support (for output to 1638c609719bSwdenk video). 1639c609719bSwdenk 1640c609719bSwdenk CONFIG_VIDEO_CT69000 1641c609719bSwdenk 1642c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1643c609719bSwdenk 1644c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1645eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1646eeb1b77bSwdenk video output is selected via environment 'videoout' 1647eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1648eeb1b77bSwdenk assumed. 1649c609719bSwdenk 1650eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 165111ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1652eeb1b77bSwdenk are possible: 1653eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1654eeb1b77bSwdenk Following standard modes are supported (* is default): 1655eeb1b77bSwdenk 1656eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1657eeb1b77bSwdenk -------------+--------------------------------------------- 1658eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1659eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1660eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1661eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1662eeb1b77bSwdenk -------------+--------------------------------------------- 1663c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1664c609719bSwdenk 1665eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 16667817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1667eeb1b77bSwdenk 1668eeb1b77bSwdenk 1669a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1670a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1671a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1672a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1673a6c7ad2fSwdenk 16747d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 16757d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 16767d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 16777d3053fbSTimur Tabi support, and should also define these other macros: 16787d3053fbSTimur Tabi 16797d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 16807d3053fbSTimur Tabi CONFIG_VIDEO 16817d3053fbSTimur Tabi CONFIG_CMD_BMP 16827d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 16837d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 16847d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 16857d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 16867d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 16877d3053fbSTimur Tabi 1688ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1689ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1690ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1691ba8e76bdSTimur Tabi description of this variable. 16927d3053fbSTimur Tabi 1693058d59b0SSimon Glass CONFIG_VIDEO_VGA 1694058d59b0SSimon Glass 1695058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1696058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1697058d59b0SSimon Glass driver. 1698058d59b0SSimon Glass 1699058d59b0SSimon Glass 1700682011ffSwdenk- Keyboard Support: 1701682011ffSwdenk CONFIG_KEYBOARD 1702682011ffSwdenk 1703682011ffSwdenk Define this to enable a custom keyboard support. 1704682011ffSwdenk This simply calls drv_keyboard_init() which must be 1705682011ffSwdenk defined in your board-specific files. 1706682011ffSwdenk The only board using this so far is RBC823. 1707a6c7ad2fSwdenk 1708c609719bSwdenk- LCD Support: CONFIG_LCD 1709c609719bSwdenk 1710c609719bSwdenk Define this to enable LCD support (for output to LCD 1711c609719bSwdenk display); also select one of the supported displays 1712c609719bSwdenk by defining one of these: 1713c609719bSwdenk 171439cf4804SStelian Pop CONFIG_ATMEL_LCD: 171539cf4804SStelian Pop 171639cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 171739cf4804SStelian Pop 1718fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1719c609719bSwdenk 1720fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1721c609719bSwdenk 1722fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1723c609719bSwdenk 1724fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1725fd3103bbSwdenk Active, color, single scan. 1726fd3103bbSwdenk 1727fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1728fd3103bbSwdenk 1729fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1730c609719bSwdenk Active, color, single scan. 1731c609719bSwdenk 1732c609719bSwdenk CONFIG_SHARP_16x9 1733c609719bSwdenk 1734c609719bSwdenk Sharp 320x240. Active, color, single scan. 1735c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1736c609719bSwdenk 1737c609719bSwdenk CONFIG_SHARP_LQ64D341 1738c609719bSwdenk 1739c609719bSwdenk Sharp LQ64D341 display, 640x480. 1740c609719bSwdenk Active, color, single scan. 1741c609719bSwdenk 1742c609719bSwdenk CONFIG_HLD1045 1743c609719bSwdenk 1744c609719bSwdenk HLD1045 display, 640x480. 1745c609719bSwdenk Active, color, single scan. 1746c609719bSwdenk 1747c609719bSwdenk CONFIG_OPTREX_BW 1748c609719bSwdenk 1749c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1750c609719bSwdenk or 1751c609719bSwdenk Hitachi LMG6912RPFC-00T 1752c609719bSwdenk or 1753c609719bSwdenk Hitachi SP14Q002 1754c609719bSwdenk 1755c609719bSwdenk 320x240. Black & white. 1756c609719bSwdenk 1757c609719bSwdenk Normally display is black on white background; define 17586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1759c609719bSwdenk 1760676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1761676d319eSSimon Glass 1762676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1763676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1764676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1765676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1766676d319eSSimon Glass a per-section basis. 1767676d319eSSimon Glass 17680d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 17690d89efefSSimon Glass 17700d89efefSSimon Glass When the console need to be scrolled, this is the number of 17710d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 17720d89efefSSimon Glass the console jump but can help speed up operation when scrolling 17730d89efefSSimon Glass is slow. 1774676d319eSSimon Glass 177545d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 177645d7f525STom Wai-Hong Tam 177745d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 177845d7f525STom Wai-Hong Tam 1779735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1780735987c5STom Wai-Hong Tam 1781735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1782735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1783735987c5STom Wai-Hong Tam 17847152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1785d791b1dcSwdenk 1786d791b1dcSwdenk If this option is set, the environment is checked for 1787d791b1dcSwdenk a variable "splashimage". If found, the usual display 1788d791b1dcSwdenk of logo, copyright and system information on the LCD 1789e94d2cd9Swdenk is suppressed and the BMP image at the address 1790d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1791d791b1dcSwdenk console is redirected to the "nulldev", too. This 1792d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1793d791b1dcSwdenk loaded very quickly after power-on. 1794d791b1dcSwdenk 1795c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1796c0880485SNikita Kiryanov 1797c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1798c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 17991551df35STom Rini (see README.displaying-bmps). 1800c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1801c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1802c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1803c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1804c0880485SNikita Kiryanov there is no need to set this option. 1805c0880485SNikita Kiryanov 18061ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 18071ca298ceSMatthias Weisser 18081ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 18091ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 18101ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 18111ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 18121ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 18131ca298ceSMatthias Weisser specify 'm' for centering the image. 18141ca298ceSMatthias Weisser 18151ca298ceSMatthias Weisser Example: 18161ca298ceSMatthias Weisser setenv splashpos m,m 18171ca298ceSMatthias Weisser => image at center of screen 18181ca298ceSMatthias Weisser 18191ca298ceSMatthias Weisser setenv splashpos 30,20 18201ca298ceSMatthias Weisser => image at x = 30 and y = 20 18211ca298ceSMatthias Weisser 18221ca298ceSMatthias Weisser setenv splashpos -10,m 18231ca298ceSMatthias Weisser => vertically centered image 18241ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 18251ca298ceSMatthias Weisser 182698f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 182798f4a3dfSStefan Roese 182898f4a3dfSStefan Roese If this option is set, additionally to standard BMP 182998f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 183098f4a3dfSStefan Roese splashscreen support or the bmp command. 183198f4a3dfSStefan Roese 1832d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1833d5011762SAnatolij Gustschin 1834d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1835d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1836d5011762SAnatolij Gustschin bmp command. 1837d5011762SAnatolij Gustschin 1838f2b96dfbSLei Wen- Do compresssing for memory range: 1839f2b96dfbSLei Wen CONFIG_CMD_ZIP 1840f2b96dfbSLei Wen 1841f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1842f2b96dfbSLei Wen to compress the specified memory at its best effort. 1843f2b96dfbSLei Wen 1844c29fdfc1Swdenk- Compression support: 18458ef70478SKees Cook CONFIG_GZIP 18468ef70478SKees Cook 18478ef70478SKees Cook Enabled by default to support gzip compressed images. 18488ef70478SKees Cook 1849c29fdfc1Swdenk CONFIG_BZIP2 1850c29fdfc1Swdenk 1851c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1852c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1853c29fdfc1Swdenk compressed images are supported. 1854c29fdfc1Swdenk 1855c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 18566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1857c29fdfc1Swdenk be at least 4MB. 1858d791b1dcSwdenk 1859fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1860fc9c1727SLuigi 'Comio' Mantellini 1861fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1862fc9c1727SLuigi 'Comio' Mantellini images is included. 1863fc9c1727SLuigi 'Comio' Mantellini 1864fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1865fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1866fc9c1727SLuigi 'Comio' Mantellini formula: 1867fc9c1727SLuigi 'Comio' Mantellini 1868fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1869fc9c1727SLuigi 'Comio' Mantellini 1870fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1871fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1872fc9c1727SLuigi 'Comio' Mantellini 1873fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1874fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1875fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1876fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1877fc9c1727SLuigi 'Comio' Mantellini 1878fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1879fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 18806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1881fc9c1727SLuigi 'Comio' Mantellini 18828ef70478SKees Cook CONFIG_LZO 18838ef70478SKees Cook 18848ef70478SKees Cook If this option is set, support for LZO compressed images 18858ef70478SKees Cook is included. 18868ef70478SKees Cook 188717ea1177Swdenk- MII/PHY support: 188817ea1177Swdenk CONFIG_PHY_ADDR 188917ea1177Swdenk 189017ea1177Swdenk The address of PHY on MII bus. 189117ea1177Swdenk 189217ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 189317ea1177Swdenk 189417ea1177Swdenk The clock frequency of the MII bus 189517ea1177Swdenk 189617ea1177Swdenk CONFIG_PHY_GIGE 189717ea1177Swdenk 189817ea1177Swdenk If this option is set, support for speed/duplex 189911ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 190017ea1177Swdenk 190117ea1177Swdenk CONFIG_PHY_RESET_DELAY 190217ea1177Swdenk 190317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 190417ea1177Swdenk reset before any MII register access is possible. 190517ea1177Swdenk For such PHY, set this option to the usec delay 190617ea1177Swdenk required. (minimum 300usec for LXT971A) 190717ea1177Swdenk 190817ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 190917ea1177Swdenk 191017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 191117ea1177Swdenk command issued before MII status register can be read 191217ea1177Swdenk 1913c609719bSwdenk- Ethernet address: 1914c609719bSwdenk CONFIG_ETHADDR 1915c68a05feSrichardretanubun CONFIG_ETH1ADDR 1916c609719bSwdenk CONFIG_ETH2ADDR 1917c609719bSwdenk CONFIG_ETH3ADDR 1918c68a05feSrichardretanubun CONFIG_ETH4ADDR 1919c68a05feSrichardretanubun CONFIG_ETH5ADDR 1920c609719bSwdenk 192111ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 192211ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1923c609719bSwdenk is not determined automatically. 1924c609719bSwdenk 1925c609719bSwdenk- IP address: 1926c609719bSwdenk CONFIG_IPADDR 1927c609719bSwdenk 1928c609719bSwdenk Define a default value for the IP address to use for 192911ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1930c609719bSwdenk determined through e.g. bootp. 19311ebcd654SWolfgang Denk (Environment variable "ipaddr") 1932c609719bSwdenk 1933c609719bSwdenk- Server IP address: 1934c609719bSwdenk CONFIG_SERVERIP 1935c609719bSwdenk 1936c609719bSwdenk Defines a default value for the IP address of a TFTP 1937c609719bSwdenk server to contact when using the "tftboot" command. 19381ebcd654SWolfgang Denk (Environment variable "serverip") 1939c609719bSwdenk 194097cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 194197cfe861SRobin Getz 194297cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 194397cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 194497cfe861SRobin Getz 19451ebcd654SWolfgang Denk- Gateway IP address: 19461ebcd654SWolfgang Denk CONFIG_GATEWAYIP 19471ebcd654SWolfgang Denk 19481ebcd654SWolfgang Denk Defines a default value for the IP address of the 19491ebcd654SWolfgang Denk default router where packets to other networks are 19501ebcd654SWolfgang Denk sent to. 19511ebcd654SWolfgang Denk (Environment variable "gatewayip") 19521ebcd654SWolfgang Denk 19531ebcd654SWolfgang Denk- Subnet mask: 19541ebcd654SWolfgang Denk CONFIG_NETMASK 19551ebcd654SWolfgang Denk 19561ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 19571ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 19581ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 19591ebcd654SWolfgang Denk forwarded through a router. 19601ebcd654SWolfgang Denk (Environment variable "netmask") 19611ebcd654SWolfgang Denk 196253a5c424SDavid Updegraff- Multicast TFTP Mode: 196353a5c424SDavid Updegraff CONFIG_MCAST_TFTP 196453a5c424SDavid Updegraff 196553a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 196653a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 196711ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 196853a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 196953a5c424SDavid Updegraff multicast group. 197053a5c424SDavid Updegraff 1971c609719bSwdenk- BOOTP Recovery Mode: 1972c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1973c609719bSwdenk 1974c609719bSwdenk If you have many targets in a network that try to 1975c609719bSwdenk boot using BOOTP, you may want to avoid that all 1976c609719bSwdenk systems send out BOOTP requests at precisely the same 1977c609719bSwdenk moment (which would happen for instance at recovery 1978c609719bSwdenk from a power failure, when all systems will try to 1979c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1980c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1981c609719bSwdenk inserted before sending out BOOTP requests. The 19826c33c785SWolfgang Denk following delays are inserted then: 1983c609719bSwdenk 1984c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1985c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1986c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1987c609719bSwdenk 4th and following 1988c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1989c609719bSwdenk 1990fe389a82Sstroese- DHCP Advanced Options: 19911fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 19921fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1993fe389a82Sstroese 19941fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 19951fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 19961fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 19971fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 19981fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 19991fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 20001fe80d79SJon Loeliger CONFIG_BOOTP_DNS 20011fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 20021fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 20031fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 20041fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 20051fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 20062c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 2007fe389a82Sstroese 20085d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 20095d110f0aSWilson Callan environment variable, not the BOOTP server. 2010fe389a82Sstroese 20112c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 20122c00e099SJoe Hershberger after the configured retry count, the call will fail 20132c00e099SJoe Hershberger instead of starting over. This can be used to fail over 20142c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 20152c00e099SJoe Hershberger is not available. 20162c00e099SJoe Hershberger 2017fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 2018fe389a82Sstroese serverip from a DHCP server, it is possible that more 2019fe389a82Sstroese than one DNS serverip is offered to the client. 2020fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2021fe389a82Sstroese serverip will be stored in the additional environment 2022fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2023fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 20241fe80d79SJon Loeliger is defined. 2025fe389a82Sstroese 2026fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2027fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2028fe389a82Sstroese need the hostname of the DHCP requester. 20295d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 20301fe80d79SJon Loeliger of the "hostname" environment variable is passed as 20311fe80d79SJon Loeliger option 12 to the DHCP server. 2032fe389a82Sstroese 2033d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2034d9a2f416SAras Vaichas 2035d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2036d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2037d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2038d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2039d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2040d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2041d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2042d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2043d9a2f416SAras Vaichas that one of the retries will be successful but note that 2044d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2045d9a2f416SAras Vaichas this delay. 2046d9a2f416SAras Vaichas 2047d22c338eSJoe Hershberger - Link-local IP address negotiation: 2048d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2049d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2050d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2051d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2052d22c338eSJoe Hershberger 2053d22c338eSJoe Hershberger See doc/README.link-local for more information. 2054d22c338eSJoe Hershberger 2055a3d991bdSwdenk - CDP Options: 2056a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2057a3d991bdSwdenk 2058a3d991bdSwdenk The device id used in CDP trigger frames. 2059a3d991bdSwdenk 2060a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2061a3d991bdSwdenk 2062a3d991bdSwdenk A two character string which is prefixed to the MAC address 2063a3d991bdSwdenk of the device. 2064a3d991bdSwdenk 2065a3d991bdSwdenk CONFIG_CDP_PORT_ID 2066a3d991bdSwdenk 2067a3d991bdSwdenk A printf format string which contains the ascii name of 2068a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 206911ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2070a3d991bdSwdenk 2071a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2072a3d991bdSwdenk 2073a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2074a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2075a3d991bdSwdenk 2076a3d991bdSwdenk CONFIG_CDP_VERSION 2077a3d991bdSwdenk 2078a3d991bdSwdenk An ascii string containing the version of the software. 2079a3d991bdSwdenk 2080a3d991bdSwdenk CONFIG_CDP_PLATFORM 2081a3d991bdSwdenk 2082a3d991bdSwdenk An ascii string containing the name of the platform. 2083a3d991bdSwdenk 2084a3d991bdSwdenk CONFIG_CDP_TRIGGER 2085a3d991bdSwdenk 2086a3d991bdSwdenk A 32bit integer sent on the trigger. 2087a3d991bdSwdenk 2088a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2089a3d991bdSwdenk 2090a3d991bdSwdenk A 16bit integer containing the power consumption of the 2091a3d991bdSwdenk device in .1 of milliwatts. 2092a3d991bdSwdenk 2093a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2094a3d991bdSwdenk 2095a3d991bdSwdenk A byte containing the id of the VLAN. 2096a3d991bdSwdenk 2097c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2098c609719bSwdenk 2099c609719bSwdenk Several configurations allow to display the current 2100c609719bSwdenk status using a LED. For instance, the LED will blink 2101c609719bSwdenk fast while running U-Boot code, stop blinking as 2102c609719bSwdenk soon as a reply to a BOOTP request was received, and 2103c609719bSwdenk start blinking slow once the Linux kernel is running 2104c609719bSwdenk (supported by a status LED driver in the Linux 2105c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2106c609719bSwdenk feature in U-Boot. 2107c609719bSwdenk 21081df7bbbaSIgor Grinberg Additional options: 21091df7bbbaSIgor Grinberg 21101df7bbbaSIgor Grinberg CONFIG_GPIO_LED 21111df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 21121df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 21131df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 21141df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 21151df7bbbaSIgor Grinberg 21169dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 21179dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 21189dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 21199dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 21209dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 21219dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 21229dfdcdfeSIgor Grinberg 2123c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2124c609719bSwdenk 2125c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2126c609719bSwdenk on those systems that support this (optional) 2127c609719bSwdenk feature, like the TQM8xxL modules. 2128c609719bSwdenk 21293f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2130c609719bSwdenk 21313f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 21323f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 21333f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 21343f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 21353f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 21363f4978c7SHeiko Schocher interface. 21373f4978c7SHeiko Schocher 21383f4978c7SHeiko Schocher ported i2c driver to the new framework: 2139ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2140ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2141ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2142ea818dbbSHeiko Schocher for defining speed and slave address 2143ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2144ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2145ea818dbbSHeiko Schocher for defining speed and slave address 2146ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2147ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2148ea818dbbSHeiko Schocher for defining speed and slave address 2149ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2150ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2151ea818dbbSHeiko Schocher for defining speed and slave address 21523f4978c7SHeiko Schocher 215300f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 215400f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 215500f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 215600f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 215700f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 215800f792e0SHeiko Schocher bus. 215900f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 216000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 216100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 216200f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 216300f792e0SHeiko Schocher second bus. 216400f792e0SHeiko Schocher 21651f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 21661f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 21671f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 21681f2ba722SSimon Glass 100000 and the slave addr 0! 21691f2ba722SSimon Glass 2170880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2171880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2172880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2173880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2174880540deSDirk Eibach 2175fac96408Strem - drivers/i2c/i2c_mxc.c 2176fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2177fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2178fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2179fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2180fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2181fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2182fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2183fac96408Strem If thoses defines are not set, default value is 100000 2184fac96408Strem for speed, and 0 for slave. 2185fac96408Strem 21861086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 21871086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 21881086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 21891086bfa9SNobuhiro Iwamatsu 21901086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 21911086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 21921086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 21931086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 21941086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 21951086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 21961086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 21971086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 21981086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 21991086bfa9SNobuhiro Iwamatsu 22002035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 22012035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 22022035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 22032035d77dSNobuhiro Iwamatsu 22042035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 22052035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 22062035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 22072035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 22082035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 22092035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 22102035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 22112035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 22122035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 22132035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 22142035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 22152035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 22162035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 22172035d77dSNobuhiro Iwamatsu 22186789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 22196789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 22206789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 22216789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 22226789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 22236789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 22246789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 22256789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 22266789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 22276789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 22286789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 22296789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 22306789e84eSHeiko Schocher 22310bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 22320bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 22330bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 22340bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 22350bdffe71SHeiko Schocher 2236e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2237e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2238e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2239e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2240e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2241e717fc6dSNaveen Krishna Ch 22423f4978c7SHeiko Schocher additional defines: 22433f4978c7SHeiko Schocher 22443f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 22453f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 22463f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 22473f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 22483f4978c7SHeiko Schocher omit this define. 22493f4978c7SHeiko Schocher 22503f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 22513f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 22523f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 22533f4978c7SHeiko Schocher omit this define. 22543f4978c7SHeiko Schocher 22553f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 22563f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 22573f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 22583f4978c7SHeiko Schocher define. 22593f4978c7SHeiko Schocher 22603f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 22613f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 22623f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 22633f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 22643f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 22653f4978c7SHeiko Schocher 22663f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 22673f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 22683f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 22693f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 22703f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 22713f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 22723f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 22733f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 22743f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 22753f4978c7SHeiko Schocher } 22763f4978c7SHeiko Schocher 22773f4978c7SHeiko Schocher which defines 22783f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2279ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2280ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2281ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2282ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2283ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 22843f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2285ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2286ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 22873f4978c7SHeiko Schocher 22883f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 22893f4978c7SHeiko Schocher 2290ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 22913f4978c7SHeiko Schocher 22923f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 22933f4978c7SHeiko Schocher provides the following compelling advantages: 22943f4978c7SHeiko Schocher 22953f4978c7SHeiko Schocher - more than one i2c adapter is usable 22963f4978c7SHeiko Schocher - approved multibus support 22973f4978c7SHeiko Schocher - better i2c mux support 22983f4978c7SHeiko Schocher 22993f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 23003f4978c7SHeiko Schocher 2301ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2302ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2303ea818dbbSHeiko Schocher for the selected CPU. 2304c609719bSwdenk 2305b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2306602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2307b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2308b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2309c609719bSwdenk command line interface. 2310c609719bSwdenk 2311bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2312c609719bSwdenk 2313b37c7e5eSwdenk There are several other quantities that must also be 2314ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2315c609719bSwdenk 23166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2317b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 23186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 231911ccc33fSMarcel Ziswiler the CPU's i2c node address). 2320c609719bSwdenk 23218d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2322a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 23238d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 23248d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 23258d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2326b37c7e5eSwdenk 23275da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 23285da71efaSEric Millbrandt 23295da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 23305da71efaSEric Millbrandt chips might think that the current transfer is still 23315da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 23325da71efaSEric Millbrandt commands until the slave device responds. 23335da71efaSEric Millbrandt 2334b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2335b37c7e5eSwdenk 2336ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2337b37c7e5eSwdenk then the following macros need to be defined (examples are 2338b37c7e5eSwdenk from include/configs/lwmon.h): 2339c609719bSwdenk 2340c609719bSwdenk I2C_INIT 2341c609719bSwdenk 2342b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2343c609719bSwdenk controller or configure ports. 2344c609719bSwdenk 2345b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2346b37c7e5eSwdenk 2347c609719bSwdenk I2C_PORT 2348c609719bSwdenk 2349c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2350c609719bSwdenk assumes both bits are on the same port). Valid values 2351c609719bSwdenk are 0..3 for ports A..D. 2352c609719bSwdenk 2353c609719bSwdenk I2C_ACTIVE 2354c609719bSwdenk 2355c609719bSwdenk The code necessary to make the I2C data line active 2356c609719bSwdenk (driven). If the data line is open collector, this 2357c609719bSwdenk define can be null. 2358c609719bSwdenk 2359b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2360b37c7e5eSwdenk 2361c609719bSwdenk I2C_TRISTATE 2362c609719bSwdenk 2363c609719bSwdenk The code necessary to make the I2C data line tri-stated 2364c609719bSwdenk (inactive). If the data line is open collector, this 2365c609719bSwdenk define can be null. 2366c609719bSwdenk 2367b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2368b37c7e5eSwdenk 2369c609719bSwdenk I2C_READ 2370c609719bSwdenk 2371472d5460SYork Sun Code that returns true if the I2C data line is high, 2372472d5460SYork Sun false if it is low. 2373c609719bSwdenk 2374b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2375b37c7e5eSwdenk 2376c609719bSwdenk I2C_SDA(bit) 2377c609719bSwdenk 2378472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2379472d5460SYork Sun is false, it clears it (low). 2380c609719bSwdenk 2381b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2382b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2383b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2384b37c7e5eSwdenk 2385c609719bSwdenk I2C_SCL(bit) 2386c609719bSwdenk 2387472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2388472d5460SYork Sun is false, it clears it (low). 2389c609719bSwdenk 2390b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2391b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2392b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2393b37c7e5eSwdenk 2394c609719bSwdenk I2C_DELAY 2395c609719bSwdenk 2396c609719bSwdenk This delay is invoked four times per clock cycle so this 2397c609719bSwdenk controls the rate of data transfer. The data rate thus 2398b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2399b37c7e5eSwdenk like: 2400b37c7e5eSwdenk 2401b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2402c609719bSwdenk 2403793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2404793b5726SMike Frysinger 2405793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2406793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2407793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2408793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2409793b5726SMike Frysinger 2410793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2411793b5726SMike Frysinger the generic GPIO functions. 2412793b5726SMike Frysinger 24136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 241447cd00faSwdenk 241547cd00faSwdenk When a board is reset during an i2c bus transfer 241647cd00faSwdenk chips might think that the current transfer is still 241747cd00faSwdenk in progress. On some boards it is possible to access 241847cd00faSwdenk the i2c SCLK line directly, either by using the 241947cd00faSwdenk processor pin as a GPIO or by having a second pin 242047cd00faSwdenk connected to the bus. If this option is defined a 242147cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 242247cd00faSwdenk is run early in the boot sequence. 242347cd00faSwdenk 242426a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 242526a33504SRichard Retanubun 242626a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 242726a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 242826a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 242926a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 243026a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 243126a33504SRichard Retanubun controller provide such a method. It is called at the end of 243226a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 243326a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 243426a33504SRichard Retanubun 243517ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 243617ea1177Swdenk 243717ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 243817ea1177Swdenk in u-boot bd_info structure based on u-boot environment 243917ea1177Swdenk variable "i2cfast". (see also i2cfast) 244017ea1177Swdenk 2441bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2442bb99ad6dSBen Warren 2443bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2444bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2445bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2446bb99ad6dSBen Warren Note that bus numbering is zero-based. 2447bb99ad6dSBen Warren 24486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2449bb99ad6dSBen Warren 2450bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 24510f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 24520f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 24530f89c54bSPeter Tyser a 1D array of device addresses 2454bb99ad6dSBen Warren 2455bb99ad6dSBen Warren e.g. 2456bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 24576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2458bb99ad6dSBen Warren 2459bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2460bb99ad6dSBen Warren 2461bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 24626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2463bb99ad6dSBen Warren 2464bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2465bb99ad6dSBen Warren 24666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2467be5e6181STimur Tabi 2468be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2469be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2470be5e6181STimur Tabi 24716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 24720dc018ecSStefan Roese 24730dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 24740dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 24750dc018ecSStefan Roese 24766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 24770dc018ecSStefan Roese 24780dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 24790dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 24800dc018ecSStefan Roese 24816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 24829ebbb54fSVictor Gallardo 24839ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 24849ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 24859ebbb54fSVictor Gallardo specified DTT device. 24869ebbb54fSVictor Gallardo 24872ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 24882ac6985aSAndrew Dyer 24892ac6985aSAndrew Dyer defining this will force the i2c_read() function in 24902ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 24912ac6985aSAndrew Dyer between writing the address pointer and reading the 24922ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 24932ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 24942ac6985aSAndrew Dyer devices can use either method, but some require one or 24952ac6985aSAndrew Dyer the other. 2496be5e6181STimur Tabi 2497c609719bSwdenk- SPI Support: CONFIG_SPI 2498c609719bSwdenk 2499c609719bSwdenk Enables SPI driver (so far only tested with 2500c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2501c609719bSwdenk D/As on the SACSng board) 2502c609719bSwdenk 25036639562eSYoshihiro Shimoda CONFIG_SH_SPI 25046639562eSYoshihiro Shimoda 25056639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 25066639562eSYoshihiro Shimoda only SH7757 is supported. 25076639562eSYoshihiro Shimoda 2508c609719bSwdenk CONFIG_SPI_X 2509c609719bSwdenk 2510c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2511c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2512c609719bSwdenk 2513c609719bSwdenk CONFIG_SOFT_SPI 2514c609719bSwdenk 2515c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2516c609719bSwdenk using hardware support. This is a general purpose 2517c609719bSwdenk driver that only requires three general I/O port pins 2518c609719bSwdenk (two outputs, one input) to function. If this is 2519c609719bSwdenk defined, the board configuration must define several 2520c609719bSwdenk SPI configuration items (port pins to use, etc). For 2521c609719bSwdenk an example, see include/configs/sacsng.h. 2522c609719bSwdenk 252304a9e118SBen Warren CONFIG_HARD_SPI 252404a9e118SBen Warren 252504a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 252604a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 252704a9e118SBen Warren must define a list of chip-select function pointers. 252804a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 252904a9e118SBen Warren example, see include/configs/mpc8349emds.h. 253004a9e118SBen Warren 253138254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 253238254f45SGuennadi Liakhovetski 253338254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 25342e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 253538254f45SGuennadi Liakhovetski 25360133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 25370133502eSMatthias Fuchs 25380133502eSMatthias Fuchs Enables FPGA subsystem. 25390133502eSMatthias Fuchs 25400133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 25410133502eSMatthias Fuchs 25420133502eSMatthias Fuchs Enables support for specific chip vendors. 25430133502eSMatthias Fuchs (ALTERA, XILINX) 25440133502eSMatthias Fuchs 25450133502eSMatthias Fuchs CONFIG_FPGA_<family> 25460133502eSMatthias Fuchs 25470133502eSMatthias Fuchs Enables support for FPGA family. 25480133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 25490133502eSMatthias Fuchs 25500133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2551c609719bSwdenk 2552c609719bSwdenk Specify the number of FPGA devices to support. 2553c609719bSwdenk 25546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2555c609719bSwdenk 2556c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2557c609719bSwdenk 25586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2559c609719bSwdenk 2560c609719bSwdenk Enable checks on FPGA configuration interface busy 2561c609719bSwdenk status by the configuration function. This option 2562c609719bSwdenk will require a board or device specific function to 2563c609719bSwdenk be written. 2564c609719bSwdenk 2565c609719bSwdenk CONFIG_FPGA_DELAY 2566c609719bSwdenk 2567c609719bSwdenk If defined, a function that provides delays in the FPGA 2568c609719bSwdenk configuration driver. 2569c609719bSwdenk 25706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2571c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2572c609719bSwdenk 25736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2574c609719bSwdenk 2575c609719bSwdenk Check for configuration errors during FPGA bitfile 2576c609719bSwdenk loading. For example, abort during Virtex II 2577c609719bSwdenk configuration if the INIT_B line goes low (which 2578c609719bSwdenk indicated a CRC error). 2579c609719bSwdenk 25806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2581c609719bSwdenk 2582c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2583c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2584c609719bSwdenk FPGA configuration sequence. The default time is 500 258511ccc33fSMarcel Ziswiler ms. 2586c609719bSwdenk 25876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2588c609719bSwdenk 2589c609719bSwdenk Maximum time to wait for BUSY to deassert during 259011ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2591c609719bSwdenk 25926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2593c609719bSwdenk 2594c609719bSwdenk Time to wait after FPGA configuration. The default is 259511ccc33fSMarcel Ziswiler 200 ms. 2596c609719bSwdenk 2597c609719bSwdenk- Configuration Management: 2598c609719bSwdenk CONFIG_IDENT_STRING 2599c609719bSwdenk 2600c609719bSwdenk If defined, this string will be added to the U-Boot 2601c609719bSwdenk version information (U_BOOT_VERSION) 2602c609719bSwdenk 2603c609719bSwdenk- Vendor Parameter Protection: 2604c609719bSwdenk 2605c609719bSwdenk U-Boot considers the values of the environment 2606c609719bSwdenk variables "serial#" (Board Serial Number) and 26077152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2608c609719bSwdenk are set once by the board vendor / manufacturer, and 2609c609719bSwdenk protects these variables from casual modification by 2610c609719bSwdenk the user. Once set, these variables are read-only, 2611c609719bSwdenk and write or delete attempts are rejected. You can 261211ccc33fSMarcel Ziswiler change this behaviour: 2613c609719bSwdenk 2614c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2615c609719bSwdenk file, the write protection for vendor parameters is 261647cd00faSwdenk completely disabled. Anybody can change or delete 2617c609719bSwdenk these parameters. 2618c609719bSwdenk 2619c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2620c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 262111ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2622c609719bSwdenk which can be changed exactly ONCE by the user. [The 2623c609719bSwdenk serial# is unaffected by this, i. e. it remains 2624c609719bSwdenk read-only.] 2625c609719bSwdenk 26262598090bSJoe Hershberger The same can be accomplished in a more flexible way 26272598090bSJoe Hershberger for any variable by configuring the type of access 26282598090bSJoe Hershberger to allow for those variables in the ".flags" variable 26292598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 26302598090bSJoe Hershberger 2631c609719bSwdenk- Protected RAM: 2632c609719bSwdenk CONFIG_PRAM 2633c609719bSwdenk 2634c609719bSwdenk Define this variable to enable the reservation of 2635c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2636c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2637c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2638c609719bSwdenk this default value by defining an environment 2639c609719bSwdenk variable "pram" to the number of kB you want to 2640c609719bSwdenk reserve. Note that the board info structure will 2641c609719bSwdenk still show the full amount of RAM. If pRAM is 2642c609719bSwdenk reserved, a new environment variable "mem" will 2643c609719bSwdenk automatically be defined to hold the amount of 2644c609719bSwdenk remaining RAM in a form that can be passed as boot 2645c609719bSwdenk argument to Linux, for instance like that: 2646c609719bSwdenk 2647fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2648c609719bSwdenk saveenv 2649c609719bSwdenk 2650c609719bSwdenk This way you can tell Linux not to use this memory, 2651c609719bSwdenk either, which results in a memory region that will 2652c609719bSwdenk not be affected by reboots. 2653c609719bSwdenk 2654c609719bSwdenk *WARNING* If your board configuration uses automatic 2655c609719bSwdenk detection of the RAM size, you must make sure that 2656c609719bSwdenk this memory test is non-destructive. So far, the 2657c609719bSwdenk following board configurations are known to be 2658c609719bSwdenk "pRAM-clean": 2659c609719bSwdenk 26601b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 26611b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2662544d97e9SWolfgang Denk FLAGADM, TQM8260 2663c609719bSwdenk 266440fef049SGabe Black- Access to physical memory region (> 4GB) 266540fef049SGabe Black Some basic support is provided for operations on memory not 266640fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 266740fef049SGabe Black support access to more than 4GB of memory on 32-bit 266840fef049SGabe Black machines using physical address extension or similar. 266940fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 267040fef049SGabe Black currently only supports clearing the memory. 267140fef049SGabe Black 2672c609719bSwdenk- Error Recovery: 2673c609719bSwdenk CONFIG_PANIC_HANG 2674c609719bSwdenk 2675c609719bSwdenk Define this variable to stop the system in case of a 2676c609719bSwdenk fatal error, so that you have to reset it manually. 2677c609719bSwdenk This is probably NOT a good idea for an embedded 267811ccc33fSMarcel Ziswiler system where you want the system to reboot 2679c609719bSwdenk automatically as fast as possible, but it may be 2680c609719bSwdenk useful during development since you can try to debug 2681c609719bSwdenk the conditions that lead to the situation. 2682c609719bSwdenk 2683c609719bSwdenk CONFIG_NET_RETRY_COUNT 2684c609719bSwdenk 2685c609719bSwdenk This variable defines the number of retries for 2686c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2687c609719bSwdenk before giving up the operation. If not defined, a 2688c609719bSwdenk default value of 5 is used. 2689c609719bSwdenk 269040cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 269140cb90eeSGuennadi Liakhovetski 269240cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 269340cb90eeSGuennadi Liakhovetski 269448a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 269548a3e999STetsuyuki Kobayashi 269648a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 269748a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 269848a3e999STetsuyuki Kobayashi try longer timeout such as 269948a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 270048a3e999STetsuyuki Kobayashi 2701c609719bSwdenk- Command Interpreter: 27028078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 270304a85b3bSwdenk 270404a85b3bSwdenk Enable auto completion of commands using TAB. 270504a85b3bSwdenk 27068078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 27078078f1a5SWolfgang Denk for the "hush" shell. 27088078f1a5SWolfgang Denk 27098078f1a5SWolfgang Denk 27106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2711c609719bSwdenk 2712c609719bSwdenk Define this variable to enable the "hush" shell (from 2713c609719bSwdenk Busybox) as command line interpreter, thus enabling 2714c609719bSwdenk powerful command line syntax like 2715c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2716c609719bSwdenk constructs ("shell scripts"). 2717c609719bSwdenk 2718c609719bSwdenk If undefined, you get the old, much simpler behaviour 2719c609719bSwdenk with a somewhat smaller memory footprint. 2720c609719bSwdenk 2721c609719bSwdenk 27226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2723c609719bSwdenk 2724c609719bSwdenk This defines the secondary prompt string, which is 2725c609719bSwdenk printed when the command interpreter needs more input 2726c609719bSwdenk to complete a command. Usually "> ". 2727c609719bSwdenk 2728c609719bSwdenk Note: 2729c609719bSwdenk 2730c609719bSwdenk In the current implementation, the local variables 2731c609719bSwdenk space and global environment variables space are 2732c609719bSwdenk separated. Local variables are those you define by 27333b57fe0aSwdenk simply typing `name=value'. To access a local 2734c609719bSwdenk variable later on, you have write `$name' or 27353b57fe0aSwdenk `${name}'; to execute the contents of a variable 27363b57fe0aSwdenk directly type `$name' at the command prompt. 2737c609719bSwdenk 2738c609719bSwdenk Global environment variables are those you use 2739c609719bSwdenk setenv/printenv to work with. To run a command stored 2740c609719bSwdenk in such a variable, you need to use the run command, 2741c609719bSwdenk and you must not use the '$' sign to access them. 2742c609719bSwdenk 2743c609719bSwdenk To store commands and special characters in a 2744c609719bSwdenk variable, please use double quotation marks 2745c609719bSwdenk surrounding the whole text of the variable, instead 2746c609719bSwdenk of the backslashes before semicolons and special 2747c609719bSwdenk symbols. 2748c609719bSwdenk 2749aa0c71acSWolfgang Denk- Commandline Editing and History: 2750aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2751aa0c71acSWolfgang Denk 275211ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2753aa0c71acSWolfgang Denk commandline input operations 2754aa0c71acSWolfgang Denk 2755a8c7c708Swdenk- Default Environment: 2756c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2757c609719bSwdenk 2758c609719bSwdenk Define this to contain any number of null terminated 2759c609719bSwdenk strings (variable = value pairs) that will be part of 27607152b1d0Swdenk the default environment compiled into the boot image. 27612262cfeeSwdenk 2762c609719bSwdenk For example, place something like this in your 2763c609719bSwdenk board's config file: 2764c609719bSwdenk 2765c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2766c609719bSwdenk "myvar1=value1\0" \ 2767c609719bSwdenk "myvar2=value2\0" 2768c609719bSwdenk 2769c609719bSwdenk Warning: This method is based on knowledge about the 2770c609719bSwdenk internal format how the environment is stored by the 27712262cfeeSwdenk U-Boot code. This is NOT an official, exported 2772c609719bSwdenk interface! Although it is unlikely that this format 27737152b1d0Swdenk will change soon, there is no guarantee either. 2774c609719bSwdenk You better know what you are doing here. 2775c609719bSwdenk 2776c609719bSwdenk Note: overly (ab)use of the default environment is 2777c609719bSwdenk discouraged. Make sure to check other ways to preset 277874de7aefSWolfgang Denk the environment like the "source" command or the 2779c609719bSwdenk boot command first. 2780c609719bSwdenk 27815e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 27825e724ca2SStephen Warren 27835e724ca2SStephen Warren Define this in order to add variables describing the 27845e724ca2SStephen Warren U-Boot build configuration to the default environment. 27855e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 27865e724ca2SStephen Warren 27875e724ca2SStephen Warren Enabling this option will cause the following to be defined: 27885e724ca2SStephen Warren 27895e724ca2SStephen Warren - CONFIG_SYS_ARCH 27905e724ca2SStephen Warren - CONFIG_SYS_CPU 27915e724ca2SStephen Warren - CONFIG_SYS_BOARD 27925e724ca2SStephen Warren - CONFIG_SYS_VENDOR 27935e724ca2SStephen Warren - CONFIG_SYS_SOC 27945e724ca2SStephen Warren 27957e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 27967e27f89fSTom Rini 27977e27f89fSTom Rini Define this in order to add variables describing certain 27987e27f89fSTom Rini run-time determined information about the hardware to the 27997e27f89fSTom Rini environment. These will be named board_name, board_rev. 28007e27f89fSTom Rini 280106fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 280206fd8538SSimon Glass 280306fd8538SSimon Glass Normally the environment is loaded when the board is 280406fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 280506fd8538SSimon Glass that so that the environment is not available until 280606fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 280706fd8538SSimon Glass this is instead controlled by the value of 280806fd8538SSimon Glass /config/load-environment. 280906fd8538SSimon Glass 2810a8c7c708Swdenk- DataFlash Support: 28112abbe075Swdenk CONFIG_HAS_DATAFLASH 28122abbe075Swdenk 28132abbe075Swdenk Defining this option enables DataFlash features and 28142abbe075Swdenk allows to read/write in Dataflash via the standard 28152abbe075Swdenk commands cp, md... 28162abbe075Swdenk 2817f61ec45eSEric Nelson- Serial Flash support 2818f61ec45eSEric Nelson CONFIG_CMD_SF 2819f61ec45eSEric Nelson 2820f61ec45eSEric Nelson Defining this option enables SPI flash commands 2821f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2822f61ec45eSEric Nelson 2823f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2824f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2825f61ec45eSEric Nelson commands. 2826f61ec45eSEric Nelson 2827f61ec45eSEric Nelson The following defaults may be provided by the platform 2828f61ec45eSEric Nelson to handle the common case when only a single serial 2829f61ec45eSEric Nelson flash is present on the system. 2830f61ec45eSEric Nelson 2831f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2832f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2833f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2834f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2835f61ec45eSEric Nelson 283624007273SSimon Glass CONFIG_CMD_SF_TEST 283724007273SSimon Glass 283824007273SSimon Glass Define this option to include a destructive SPI flash 283924007273SSimon Glass test ('sf test'). 284024007273SSimon Glass 28411dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 28421dcd6d03SJagannadha Sutradharudu Teki 28431dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 28441dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 28451dcd6d03SJagannadha Sutradharudu Teki 2846b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2847b902e07cSJagannadha Sutradharudu Teki 2848b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2849b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2850b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2851b902e07cSJagannadha Sutradharudu Teki 28523f85ce27Swdenk- SystemACE Support: 28533f85ce27Swdenk CONFIG_SYSTEMACE 28543f85ce27Swdenk 28553f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 28563f85ce27Swdenk chips attached via some sort of local bus. The address 285711ccc33fSMarcel Ziswiler of the chip must also be defined in the 28586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 28593f85ce27Swdenk 28603f85ce27Swdenk #define CONFIG_SYSTEMACE 28616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 28623f85ce27Swdenk 28633f85ce27Swdenk When SystemACE support is added, the "ace" device type 28643f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 28653f85ce27Swdenk 2866ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2867ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2868ecb0ccd9SWolfgang Denk 286928cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2870ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 287128cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2872ecb0ccd9SWolfgang Denk number generator is used. 2873ecb0ccd9SWolfgang Denk 287428cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 287528cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 287628cb9375SWolfgang Denk defined, the normal port 69 is used. 287728cb9375SWolfgang Denk 287828cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2879ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2880ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2881ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2882ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2883ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2884ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2885ecb0ccd9SWolfgang Denk 2886bf36c5d5SSimon Glass- Hashing support: 2887bf36c5d5SSimon Glass CONFIG_CMD_HASH 2888bf36c5d5SSimon Glass 2889bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2890bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2891bf36c5d5SSimon Glass 2892bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2893bf36c5d5SSimon Glass 2894bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2895bf36c5d5SSimon Glass size a little. 2896bf36c5d5SSimon Glass 2897bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2898bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2899bf36c5d5SSimon Glass 2900bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2901bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2902bf36c5d5SSimon Glass 2903a11f1873SRobert Winkler- Freescale i.MX specific commands: 2904a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2905a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2906a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2907a11f1873SRobert Winkler 2908a11f1873SRobert Winkler CONFIG_CMD_BMODE 2909a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2910a11f1873SRobert Winkler a boot from specific media. 2911a11f1873SRobert Winkler 2912a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2913a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2914a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2915a11f1873SRobert Winkler will set it back to normal. This command currently 2916a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2917a11f1873SRobert Winkler 291819c402afSSimon Glass- Signing support: 291919c402afSSimon Glass CONFIG_RSA 292019c402afSSimon Glass 292119c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 29228bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 292319c402afSSimon Glass 292419c402afSSimon Glass The signing part is build into mkimage regardless of this 292519c402afSSimon Glass option. 292619c402afSSimon Glass 29279e50c406SHeiko Schocher- bootcount support: 29289e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 29299e50c406SHeiko Schocher 29309e50c406SHeiko Schocher This enables the bootcounter support, see: 29319e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 29329e50c406SHeiko Schocher 29339e50c406SHeiko Schocher CONFIG_AT91SAM9XE 29349e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 29359e50c406SHeiko Schocher CONFIG_BLACKFIN 29369e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 29379e50c406SHeiko Schocher CONFIG_SOC_DA8XX 29389e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 29399e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 29409e50c406SHeiko Schocher enable support for the bootcounter in RAM 29419e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 29429e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 29439e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 29449e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 29459e50c406SHeiko Schocher the bootcounter. 29469e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 294719c402afSSimon Glass 2948a8c7c708Swdenk- Show boot progress: 2949c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2950c609719bSwdenk 2951c609719bSwdenk Defining this option allows to add some board- 2952c609719bSwdenk specific code (calling a user-provided function 2953c609719bSwdenk "show_boot_progress(int)") that enables you to show 2954c609719bSwdenk the system's boot progress on some display (for 2955c609719bSwdenk example, some LED's) on your board. At the moment, 2956c609719bSwdenk the following checkpoints are implemented: 2957c609719bSwdenk 29583a608ca0SSimon Glass- Detailed boot stage timing 29593a608ca0SSimon Glass CONFIG_BOOTSTAGE 29603a608ca0SSimon Glass Define this option to get detailed timing of each stage 29613a608ca0SSimon Glass of the boot process. 29623a608ca0SSimon Glass 29633a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 29643a608ca0SSimon Glass This is the number of available user bootstage records. 29653a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 29663a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 29673a608ca0SSimon Glass the limit, recording will stop. 29683a608ca0SSimon Glass 29693a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 29703a608ca0SSimon Glass Define this to print a report before boot, similar to this: 29713a608ca0SSimon Glass 29723a608ca0SSimon Glass Timer summary in microseconds: 29733a608ca0SSimon Glass Mark Elapsed Stage 29743a608ca0SSimon Glass 0 0 reset 29753a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 29763a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 29773a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 29783a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 29793a608ca0SSimon Glass 3,910,375 250,777 main_loop 29803a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 29813a608ca0SSimon Glass 30,361,327 445,160 start_kernel 29823a608ca0SSimon Glass 29832eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 29842eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 29852eba38cfSSimon Glass and un/stashing of bootstage data. 29862eba38cfSSimon Glass 298794fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 298894fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 298994fd1316SSimon Glass node is created with each bootstage id as a child. Each child 299094fd1316SSimon Glass has a 'name' property and either 'mark' containing the 299194fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 299294fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 299394fd1316SSimon Glass For example: 299494fd1316SSimon Glass 299594fd1316SSimon Glass bootstage { 299694fd1316SSimon Glass 154 { 299794fd1316SSimon Glass name = "board_init_f"; 299894fd1316SSimon Glass mark = <3575678>; 299994fd1316SSimon Glass }; 300094fd1316SSimon Glass 170 { 300194fd1316SSimon Glass name = "lcd"; 300294fd1316SSimon Glass accum = <33482>; 300394fd1316SSimon Glass }; 300494fd1316SSimon Glass }; 300594fd1316SSimon Glass 300694fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 300794fd1316SSimon Glass 30081372cce2SMarian BalakowiczLegacy uImage format: 30091372cce2SMarian Balakowicz 3010c609719bSwdenk Arg Where When 3011c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3012c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3013c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3014c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3015c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3016c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3017c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3018c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3019c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 30201372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3021c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3022c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3023c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3024c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 30251372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3026c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 30271372cce2SMarian Balakowicz 30281372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 30291372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 30301372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 30311372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 30321372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 30331372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 30341372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 303511ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 30361372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 30371372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 30381372cce2SMarian Balakowicz 3039ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3040c609719bSwdenk 3041a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 304263e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 304363e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 304463e73c9aSwdenk 3045566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3046566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3047566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3048566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3049566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3050566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3051566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3052566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3053566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3054566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3055566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3056566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3057566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3058566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3059566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3060566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3061566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3062566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3063566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3064566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3065566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3066566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3067566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3068566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3069566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3070566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3071566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3072566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3073566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3074566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3075566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3076566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3077566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3078566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3079566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3080566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3081566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3082566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3083566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3084566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3085566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3086566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3087566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3088566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3089566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3090566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3091566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3092c609719bSwdenk 3093566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3094c609719bSwdenk 3095566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3096566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3097566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3098206c60cbSwdenk 3099566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3100566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 310111ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3102566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3103566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3104566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 310574de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 310674de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3107566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3108c609719bSwdenk 31091372cce2SMarian BalakowiczFIT uImage format: 31101372cce2SMarian Balakowicz 31111372cce2SMarian Balakowicz Arg Where When 31121372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 31131372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 31141372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 31151372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 31161372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 31171372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3118f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 31191372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 31201372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 31211372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 31221372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 31231372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 312411ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 312511ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 31261372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 31271372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 31281372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 31291372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 31301372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 31311372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 31321372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 31331372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 31341372cce2SMarian Balakowicz 31351372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 31361372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 31371372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 313811ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 31391372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 31401372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 31411372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 31421372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 31431372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 31441372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 31451372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 31461372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 31471372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 31481372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 31491372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 31501372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 31511372cce2SMarian Balakowicz 315211ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 31531372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 31541372cce2SMarian Balakowicz 315511ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 31561372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 31571372cce2SMarian Balakowicz 315811ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 31591372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 31601372cce2SMarian Balakowicz 3161d95f6ec7SGabe Black- FIT image support: 3162d95f6ec7SGabe Black CONFIG_FIT 3163d95f6ec7SGabe Black Enable support for the FIT uImage format. 3164d95f6ec7SGabe Black 3165d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3166d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3167d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3168d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3169d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3170d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3171d95f6ec7SGabe Black 31723e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 31733e569a6bSSimon Glass This option enables signature verification of FIT uImages, 31743e569a6bSSimon Glass using a hash signed and verified using RSA. See 31753e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 31763e569a6bSSimon Glass 31774cf2609bSWolfgang Denk- Standalone program support: 31784cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 31794cf2609bSWolfgang Denk 31806feff899SWolfgang Denk This option defines a board specific value for the 31816feff899SWolfgang Denk address where standalone program gets loaded, thus 31826feff899SWolfgang Denk overwriting the architecture dependent default 31834cf2609bSWolfgang Denk settings. 31844cf2609bSWolfgang Denk 31854cf2609bSWolfgang Denk- Frame Buffer Address: 31864cf2609bSWolfgang Denk CONFIG_FB_ADDR 31874cf2609bSWolfgang Denk 31884cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 318944a53b57SWolfgang Denk address for frame buffer. This is typically the case 319044a53b57SWolfgang Denk when using a graphics controller has separate video 319144a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 319244a53b57SWolfgang Denk the given address instead of dynamically reserving it 319344a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 319444a53b57SWolfgang Denk the memory for the frame buffer depending on the 319544a53b57SWolfgang Denk configured panel size. 31964cf2609bSWolfgang Denk 31974cf2609bSWolfgang Denk Please see board_init_f function. 31984cf2609bSWolfgang Denk 3199cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3200cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3201cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3202cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3203cccfc2abSDetlev Zundel 3204cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3205cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3206cccfc2abSDetlev Zundel 3207cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3208cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3209cccfc2abSDetlev Zundel 3210cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3211cccfc2abSDetlev Zundel Needed for mtdparts command support. 3212cccfc2abSDetlev Zundel 3213cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3214cccfc2abSDetlev Zundel 3215cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3216cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3217cccfc2abSDetlev Zundel 321870c219cdSJoe Hershberger- UBI support 321970c219cdSJoe Hershberger CONFIG_CMD_UBI 322070c219cdSJoe Hershberger 322170c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 322270c219cdSJoe Hershberger with the UBI flash translation layer 322370c219cdSJoe Hershberger 322470c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 322570c219cdSJoe Hershberger 3226147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3227147162daSJoe Hershberger 3228147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3229147162daSJoe Hershberger warnings and errors enabled. 3230147162daSJoe Hershberger 323170c219cdSJoe Hershberger- UBIFS support 323270c219cdSJoe Hershberger CONFIG_CMD_UBIFS 323370c219cdSJoe Hershberger 323470c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 323570c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 323670c219cdSJoe Hershberger 323770c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 323870c219cdSJoe Hershberger 3239147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3240147162daSJoe Hershberger 3241147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3242147162daSJoe Hershberger warnings and errors enabled. 3243147162daSJoe Hershberger 32446a11cf48SDaniel Schwierzeck- SPL framework 32456a11cf48SDaniel Schwierzeck CONFIG_SPL 32466a11cf48SDaniel Schwierzeck Enable building of SPL globally. 32476a11cf48SDaniel Schwierzeck 324895579793STom Rini CONFIG_SPL_LDSCRIPT 324995579793STom Rini LDSCRIPT for linking the SPL binary. 325095579793STom Rini 32516ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 32526ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 32536ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 32546ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 32558960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32566ebc3461SAlbert ARIBAUD must not be both defined at the same time. 32576ebc3461SAlbert ARIBAUD 325895579793STom Rini CONFIG_SPL_MAX_SIZE 32596ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 32606ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 32616ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 32626ebc3461SAlbert ARIBAUD not exceed it. 326395579793STom Rini 32646a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 32656a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 32666a11cf48SDaniel Schwierzeck 326794a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 326894a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 326994a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 327094a45bb1SScott Wood 327195579793STom Rini CONFIG_SPL_BSS_START_ADDR 327295579793STom Rini Link address for the BSS within the SPL binary. 327395579793STom Rini 327495579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 32756ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 32766ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 32776ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 32788960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32796ebc3461SAlbert ARIBAUD must not be both defined at the same time. 328095579793STom Rini 328195579793STom Rini CONFIG_SPL_STACK 328295579793STom Rini Adress of the start of the stack SPL will use 328395579793STom Rini 328494a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 328594a45bb1SScott Wood Adress of the start of the stack SPL will use after 328694a45bb1SScott Wood relocation. If unspecified, this is equal to 328794a45bb1SScott Wood CONFIG_SPL_STACK. 328894a45bb1SScott Wood 328995579793STom Rini CONFIG_SYS_SPL_MALLOC_START 329095579793STom Rini Starting address of the malloc pool used in SPL. 329195579793STom Rini 329295579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 329395579793STom Rini The size of the malloc pool used in SPL. 32946a11cf48SDaniel Schwierzeck 329547f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 329647f7bcaeSTom Rini Enable the SPL framework under common/. This framework 329747f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 329847f7bcaeSTom Rini NAND loading of the Linux Kernel. 329947f7bcaeSTom Rini 3300861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3301861a86f4STom Rini For ARM, enable an optional function to print more information 3302861a86f4STom Rini about the running system. 3303861a86f4STom Rini 33044b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 33054b919725SScott Wood Arch init code should be built for a very small image 33064b919725SScott Wood 33076a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 33086a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 33096a11cf48SDaniel Schwierzeck 33106a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 33116a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 33126a11cf48SDaniel Schwierzeck 33136a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 33146a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 33156a11cf48SDaniel Schwierzeck 33166a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 33176a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 33186a11cf48SDaniel Schwierzeck 33196a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 33206a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 33216a11cf48SDaniel Schwierzeck 332295579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 332395579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 332495579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 332595579793STom Rini Address, size and partition on the MMC to load U-Boot from 332695579793STom Rini when the MMC is being used in raw mode. 332795579793STom Rini 33282b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 33292b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 33302b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 33312b75b0adSPeter Korsgaard 33322b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 33332b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 33342b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 33352b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 33362b75b0adSPeter Korsgaard (for falcon mode) 33372b75b0adSPeter Korsgaard 333895579793STom Rini CONFIG_SPL_FAT_SUPPORT 333995579793STom Rini Support for fs/fat/libfat.o in SPL binary 334095579793STom Rini 334195579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 334295579793STom Rini Filename to read to load U-Boot when reading from FAT 334395579793STom Rini 33447ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 33457ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 33467ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 33477ad2cc79SPeter Korsgaard 33487ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 33497ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 33507ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 33517ad2cc79SPeter Korsgaard 335206f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 335306f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 335406f60ae3SScott Wood start.S waits for the rest of the SPL to load before 335506f60ae3SScott Wood continuing (the hardware starts execution after just 335606f60ae3SScott Wood loading the first page rather than the full 4K). 335706f60ae3SScott Wood 3358651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3359651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3360651fcf60SPrabhakar Kushwaha 33616f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 33626f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 33636f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 33646f2f01b9SScott Wood 33656f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 33666f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 33676f2f01b9SScott Wood 33686f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 33696f2f01b9SScott Wood Include standard software ECC in the SPL 33706f2f01b9SScott Wood 337195579793STom Rini CONFIG_SPL_NAND_SIMPLE 33727d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 33737d4b7955SScott Wood expose the cmd_ctrl() interface. 337495579793STom Rini 3375bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3376bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 33775614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3378bb0dc108SYing Zhang 33797c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 33807c8eea59SYing Zhang Set for common ddr init with serial presence detect in 33817c8eea59SYing Zhang SPL binary. 33827c8eea59SYing Zhang 338395579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 338495579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 338595579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 338695579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 338795579793STom Rini CONFIG_SYS_NAND_ECCBYTES 338895579793STom Rini Defines the size and behavior of the NAND that SPL uses 33897d4b7955SScott Wood to read U-Boot 339095579793STom Rini 3391fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3392fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3393fbe76ae4SPrabhakar Kushwaha 339495579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 33957d4b7955SScott Wood Location in NAND to read U-Boot from 33967d4b7955SScott Wood 33977d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 33987d4b7955SScott Wood Location in memory to load U-Boot to 33997d4b7955SScott Wood 34007d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 34017d4b7955SScott Wood Size of image to load 340295579793STom Rini 340395579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 34047d4b7955SScott Wood Entry point in loaded image to jump to 340595579793STom Rini 340695579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 340795579793STom Rini Define this if you need to first read the OOB and then the 340895579793STom Rini data. This is used for example on davinci plattforms. 340995579793STom Rini 341095579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 341195579793STom Rini Support for an OMAP3-specific set of functions to return the 341295579793STom Rini ID and MFR of the first attached NAND chip, if present. 341395579793STom Rini 34146a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 34156a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 34166a11cf48SDaniel Schwierzeck 34176a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 34186a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 34196a11cf48SDaniel Schwierzeck 34206a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 34216a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 34226a11cf48SDaniel Schwierzeck 3423c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3424c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3425c57b953dSPavel Machek 34266a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 34276a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 34281372cce2SMarian Balakowicz 3429ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3430ba1bee43SYing Zhang Support for the environment operating in SPL binary 3431ba1bee43SYing Zhang 3432ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3433ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3434ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3435ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3436ba1bee43SYing Zhang 343774752baaSScott Wood CONFIG_SPL_PAD_TO 34386113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 34396113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 34406113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34416113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34426113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 344374752baaSScott Wood 3444ca2fca22SScott Wood CONFIG_SPL_TARGET 3445ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3446ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3447ca2fca22SScott Wood example if more than one image needs to be produced. 3448ca2fca22SScott Wood 344987ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 345087ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 345187ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 345287ebee39SSimon Glass option to re-enable it. This will affect the output of the 345387ebee39SSimon Glass bootm command when booting a FIT image. 345487ebee39SSimon Glass 34553aa29de0SYing Zhang- TPL framework 34563aa29de0SYing Zhang CONFIG_TPL 34573aa29de0SYing Zhang Enable building of TPL globally. 34583aa29de0SYing Zhang 34593aa29de0SYing Zhang CONFIG_TPL_PAD_TO 34603aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 34613aa29de0SYing Zhang the TPL payload. By default, this is defined as 34623aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34633aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34643aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 34653aa29de0SYing Zhang 3466c609719bSwdenkModem Support: 3467c609719bSwdenk-------------- 3468c609719bSwdenk 3469566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3470c609719bSwdenk 347111ccc33fSMarcel Ziswiler- Modem support enable: 3472c609719bSwdenk CONFIG_MODEM_SUPPORT 3473c609719bSwdenk 3474c609719bSwdenk- RTS/CTS Flow control enable: 3475c609719bSwdenk CONFIG_HWFLOW 3476c609719bSwdenk 3477c609719bSwdenk- Modem debug support: 3478c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3479c609719bSwdenk 3480c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3481c609719bSwdenk for modem support. Useful only with BDI2000. 3482c609719bSwdenk 3483a8c7c708Swdenk- Interrupt support (PPC): 3484a8c7c708Swdenk 3485a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3486a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 348711ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3488a8c7c708Swdenk should set decrementer_count to appropriate value. If 348911ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3490a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 349111ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3492a8c7c708Swdenk specific handling. If board has watchdog / status_led 3493a8c7c708Swdenk / other_activity_monitor it works automatically from 3494a8c7c708Swdenk general timer_interrupt(). 3495a8c7c708Swdenk 3496c609719bSwdenk- General: 3497c609719bSwdenk 3498c609719bSwdenk In the target system modem support is enabled when a 3499c609719bSwdenk specific key (key combination) is pressed during 3500c609719bSwdenk power-on. Otherwise U-Boot will boot normally 350111ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3502c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3503c609719bSwdenk function, returning 1 and thus enabling modem 3504c609719bSwdenk initialization. 3505c609719bSwdenk 3506c609719bSwdenk If there are no modem init strings in the 3507c609719bSwdenk environment, U-Boot proceed to autoboot; the 3508c609719bSwdenk previous output (banner, info printfs) will be 350911ccc33fSMarcel Ziswiler suppressed, though. 3510c609719bSwdenk 3511c609719bSwdenk See also: doc/README.Modem 3512c609719bSwdenk 35139660e442SHelmut RaigerBoard initialization settings: 35149660e442SHelmut Raiger------------------------------ 35159660e442SHelmut Raiger 35169660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 35179660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 35189660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 35199660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 35209660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 35219660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 35229660e442SHelmut Raiger 35239660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 35249660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 35259660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 35269660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3527c609719bSwdenk 3528c609719bSwdenkConfiguration Settings: 3529c609719bSwdenk----------------------- 3530c609719bSwdenk 35314d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 35324d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 35334d1fd7f1SYork Sun 35346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3535c609719bSwdenk undefine this when you're short of memory. 3536c609719bSwdenk 35372fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 35382fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 35392fb2604dSPeter Tyser 35406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3541c609719bSwdenk prompt for user input. 3542c609719bSwdenk 35436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3544c609719bSwdenk 35456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3546c609719bSwdenk 35476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3548c609719bSwdenk 35496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3550c609719bSwdenk the application (usually a Linux kernel) when it is 3551c609719bSwdenk booted 3552c609719bSwdenk 35536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3554c609719bSwdenk List of legal baudrate settings for this board. 3555c609719bSwdenk 35566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3557c609719bSwdenk Suppress display of console information at boot. 3558c609719bSwdenk 35596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3560c609719bSwdenk If the board specific function 3561c609719bSwdenk extern int overwrite_console (void); 3562c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3563c609719bSwdenk serial port, else the settings in the environment are used. 3564c609719bSwdenk 35656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3566c609719bSwdenk Enable the call to overwrite_console(). 3567c609719bSwdenk 35686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3569c609719bSwdenk Enable overwrite of previous console environment settings. 3570c609719bSwdenk 35716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3572c609719bSwdenk Begin and End addresses of the area used by the 3573c609719bSwdenk simple memory test. 3574c609719bSwdenk 35756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3576c609719bSwdenk Enable an alternate, more extensive memory test. 3577c609719bSwdenk 35786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 35795f535fe1Swdenk Scratch address used by the alternate memory test 35805f535fe1Swdenk You only need to set this if address zero isn't writeable 35815f535fe1Swdenk 35826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 35836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 358414f73ca6SStefan Roese this specified memory area will get subtracted from the top 358511ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 358614f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 358714f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 358814f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 35895e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 359014f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 35915e12e75dSStefan Roese will have to get fixed in Linux additionally. 359214f73ca6SStefan Roese 359314f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 359414f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 359514f73ca6SStefan Roese be touched. 359614f73ca6SStefan Roese 359714f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 359814f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 359914f73ca6SStefan Roese then the end address of the Linux memory will be located at a 360014f73ca6SStefan Roese non page size aligned address and this could cause major 360114f73ca6SStefan Roese problems. 360214f73ca6SStefan Roese 36036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3604c609719bSwdenk Enable temporary baudrate change while serial download 3605c609719bSwdenk 36066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3607c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3608c609719bSwdenk 36096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3610c609719bSwdenk Physical start address of Motherboard I/O (if using a 3611c609719bSwdenk Cogent motherboard) 3612c609719bSwdenk 36136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3614c609719bSwdenk Physical start address of Flash memory. 3615c609719bSwdenk 36166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3617c609719bSwdenk Physical start address of boot monitor code (set by 3618c609719bSwdenk make config files to be same as the text base address 361914d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 36206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3621c609719bSwdenk 36226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 36233b57fe0aSwdenk Size of memory reserved for monitor code, used to 36243b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 36253b57fe0aSwdenk embedded within the U-Boot image, or in a separate 36263b57fe0aSwdenk flash sector. 3627c609719bSwdenk 36286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3629c609719bSwdenk Size of DRAM reserved for malloc() use. 3630c609719bSwdenk 36316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 363215940c9aSStefan Roese Normally compressed uImages are limited to an 363315940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 36346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 363515940c9aSStefan Roese to adjust this setting to your needs. 3636c609719bSwdenk 36376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3638c609719bSwdenk Maximum size of memory mapped by the startup code of 3639c609719bSwdenk the Linux kernel; all data that must be processed by 36407d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 36417d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 36421bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 36437d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3644c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3645c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3646c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3647c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3648c609719bSwdenk 3649fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3650fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3651fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3652fca43cc8SJohn Rigby is enabled. 3653fca43cc8SJohn Rigby 3654fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3655fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3656fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3657fca43cc8SJohn Rigby 3658fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3659fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3660fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3661fca43cc8SJohn Rigby 36626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3663c609719bSwdenk Max number of Flash memory banks 3664c609719bSwdenk 36656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3666c609719bSwdenk Max number of sectors on a Flash chip 3667c609719bSwdenk 36686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3669c609719bSwdenk Timeout for Flash erase operations (in ms) 3670c609719bSwdenk 36716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3672c609719bSwdenk Timeout for Flash write operations (in ms) 3673c609719bSwdenk 36746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 36758564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 36768564acf9Swdenk 36776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 36788564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 36798564acf9Swdenk 36806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 36818564acf9Swdenk If defined, hardware flash sectors protection is used 36828564acf9Swdenk instead of U-Boot software protection. 36838564acf9Swdenk 36846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3685c609719bSwdenk 3686c609719bSwdenk Enable TFTP transfers directly to flash memory; 3687c609719bSwdenk without this option such a download has to be 3688c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3689c609719bSwdenk copy from RAM to flash. 3690c609719bSwdenk 3691c609719bSwdenk The two-step approach is usually more reliable, since 3692c609719bSwdenk you can check if the download worked before you erase 369311ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 369411ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3695c609719bSwdenk downloaded image) this option may be very useful. 3696c609719bSwdenk 36976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3698c609719bSwdenk Define if the flash driver uses extra elements in the 36995653fc33Swdenk common flash structure for storing flash geometry. 37005653fc33Swdenk 370100b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 37025653fc33Swdenk This option also enables the building of the cfi_flash driver 37035653fc33Swdenk in the drivers directory 370453cf9435Sstroese 370591809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 370691809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 370791809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 370891809ed5SPiotr Ziecik to the MTD layer. 370991809ed5SPiotr Ziecik 37106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 371196ef831fSGuennadi Liakhovetski Use buffered writes to flash. 371296ef831fSGuennadi Liakhovetski 371396ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 371496ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 371596ef831fSGuennadi Liakhovetski write commands. 371696ef831fSGuennadi Liakhovetski 37176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 37185568e613SStefan Roese If this option is defined, the common CFI flash doesn't 37195568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 37205568e613SStefan Roese is useful, if some of the configured banks are only 37215568e613SStefan Roese optionally available. 37225568e613SStefan Roese 37239a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 37249a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 37259a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 37269a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 37279a042e9cSJerry Van Baren 3728352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3729352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3730352ef3f1SStefan Roese against the source after the write operation. An error message 3731352ef3f1SStefan Roese will be printed when the contents are not identical. 3732352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3733352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3734352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3735352ef3f1SStefan Roese this option if you really know what you are doing. 3736352ef3f1SStefan Roese 37376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 373811ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 373911ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 374053cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 374153cf9435Sstroese buffers can be full shortly after enabling the interface 374211ccc33fSMarcel Ziswiler on high Ethernet traffic. 374353cf9435Sstroese Defaults to 4 if not defined. 3744c609719bSwdenk 3745ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3746ea882bafSWolfgang Denk 3747ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3748ea882bafSWolfgang Denk internally to store the environment settings. The default 3749ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3750ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3751ea882bafSWolfgang Denk lib/hashtable.c for details. 3752ea882bafSWolfgang Denk 37532598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 37542598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 37551bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 37562598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 37572598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 37582598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 37592598090bSJoe Hershberger 37602598090bSJoe Hershberger The format of the list is: 37612598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3762267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3763267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 37642598090bSJoe Hershberger entry = variable_name[:attributes] 37652598090bSJoe Hershberger list = entry[,list] 37662598090bSJoe Hershberger 37672598090bSJoe Hershberger The type attributes are: 37682598090bSJoe Hershberger s - String (default) 37692598090bSJoe Hershberger d - Decimal 37702598090bSJoe Hershberger x - Hexadecimal 37712598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 37722598090bSJoe Hershberger i - IP address 37732598090bSJoe Hershberger m - MAC address 37742598090bSJoe Hershberger 3775267541f7SJoe Hershberger The access attributes are: 3776267541f7SJoe Hershberger a - Any (default) 3777267541f7SJoe Hershberger r - Read-only 3778267541f7SJoe Hershberger o - Write-once 3779267541f7SJoe Hershberger c - Change-default 3780267541f7SJoe Hershberger 37812598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 37822598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 37832598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 37842598090bSJoe Hershberger 37852598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 37862598090bSJoe Hershberger Define this to a list (string) to define validation that 37872598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 37882598090bSJoe Hershberger environment variable. To override a setting in the static 37892598090bSJoe Hershberger list, simply add an entry for the same variable name to the 37902598090bSJoe Hershberger ".flags" variable. 37912598090bSJoe Hershberger 3792267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3793267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3794267541f7SJoe Hershberger access flags. 3795267541f7SJoe Hershberger 37965c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 37975c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 37985c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 37995c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 38005c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 38015c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 38025c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 38035c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 38045c1a7ea6SSimon Glass your board please report the problem and send patches! 38055c1a7ea6SSimon Glass 38060b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 38070b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 38080b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 38090b1b60c7SLokesh Vutla the value can be calulated on a given board. 3810632efa74SSimon Glass 3811c609719bSwdenkThe following definitions that deal with the placement and management 3812c609719bSwdenkof environment data (variable area); in general, we support the 3813c609719bSwdenkfollowing configurations: 3814c609719bSwdenk 3815c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3816c3eb3fe4SMike Frysinger 3817c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3818c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3819c3eb3fe4SMike Frysinger 38205a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3821c609719bSwdenk 3822c609719bSwdenk Define this if the environment is in flash memory. 3823c609719bSwdenk 3824c609719bSwdenk a) The environment occupies one whole flash sector, which is 3825c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3826c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3827c609719bSwdenk sector" type flash chips, which have several smaller 3828c609719bSwdenk sectors at the start or the end. For instance, such a 3829c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3830c609719bSwdenk such a case you would place the environment in one of the 3831c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3832c609719bSwdenk "top boot sector" type flash chips, you would put the 3833c609719bSwdenk environment in one of the last sectors, leaving a gap 3834c609719bSwdenk between U-Boot and the environment. 3835c609719bSwdenk 38360e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3837c609719bSwdenk 3838c609719bSwdenk Offset of environment data (variable area) to the 3839c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3840c609719bSwdenk type flash chips the second sector can be used: the offset 3841c609719bSwdenk for this sector is given here. 3842c609719bSwdenk 38436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3844c609719bSwdenk 38450e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3846c609719bSwdenk 3847c609719bSwdenk This is just another way to specify the start address of 3848c609719bSwdenk the flash sector containing the environment (instead of 38490e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3850c609719bSwdenk 38510e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3852c609719bSwdenk 3853c609719bSwdenk Size of the sector containing the environment. 3854c609719bSwdenk 3855c609719bSwdenk 3856c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3857c609719bSwdenk In such a case you don't want to spend a whole sector for 3858c609719bSwdenk the environment. 3859c609719bSwdenk 38600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3861c609719bSwdenk 38625a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 38630e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3864c609719bSwdenk of this flash sector for the environment. This saves 3865c609719bSwdenk memory for the RAM copy of the environment. 3866c609719bSwdenk 3867c609719bSwdenk It may also save flash memory if you decide to use this 3868c609719bSwdenk when your environment is "embedded" within U-Boot code, 3869c609719bSwdenk since then the remainder of the flash sector could be used 3870c609719bSwdenk for U-Boot code. It should be pointed out that this is 3871c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3872c609719bSwdenk updating the environment in flash makes it always 3873c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3874c609719bSwdenk wrong before the contents has been restored from a copy in 3875c609719bSwdenk RAM, your target system will be dead. 3876c609719bSwdenk 38770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 38780e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3879c609719bSwdenk 3880c609719bSwdenk These settings describe a second storage area used to hold 388111ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 38823e38691eSwdenk a valid backup copy in case there is a power failure during 3883c609719bSwdenk a "saveenv" operation. 3884c609719bSwdenk 3885c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3886c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3887c609719bSwdenkaccordingly! 3888c609719bSwdenk 3889c609719bSwdenk 38909314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3891c609719bSwdenk 3892c609719bSwdenk Define this if you have some non-volatile memory device 3893c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3894c609719bSwdenk environment. 3895c609719bSwdenk 38960e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 38970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3898c609719bSwdenk 389911ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3900c609719bSwdenk want to use for environment. It is assumed that this memory 3901c609719bSwdenk can just be read and written to, without any special 3902c609719bSwdenk provision. 3903c609719bSwdenk 3904c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3905c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 390611ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3907c609719bSwdenkU-Boot will hang. 3908c609719bSwdenk 3909c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3910c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3911c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3912c609719bSwdenkto save the current settings. 3913c609719bSwdenk 3914c609719bSwdenk 3915bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3916c609719bSwdenk 3917c609719bSwdenk Use this if you have an EEPROM or similar serial access 3918c609719bSwdenk device and a driver for it. 3919c609719bSwdenk 39200e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39210e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3922c609719bSwdenk 3923c609719bSwdenk These two #defines specify the offset and size of the 3924c609719bSwdenk environment area within the total memory of your EEPROM. 3925c609719bSwdenk 39266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3927c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3928c609719bSwdenk The default address is zero. 3929c609719bSwdenk 39306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3931c609719bSwdenk If defined, the number of bits used to address bytes in a 3932c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3933c609719bSwdenk would require six bits. 3934c609719bSwdenk 39356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3936c609719bSwdenk If defined, the number of milliseconds to delay between 3937c609719bSwdenk page writes. The default is zero milliseconds. 3938c609719bSwdenk 39396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3940c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3941c609719bSwdenk that this is NOT the chip address length! 3942c609719bSwdenk 39436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 39445cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 39455cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 39465cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 39475cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 39485cf91d6bSwdenk byte chips. 39495cf91d6bSwdenk 39505cf91d6bSwdenk Note that we consider the length of the address field to 39515cf91d6bSwdenk still be one byte because the extra address bits are hidden 39525cf91d6bSwdenk in the chip address. 39535cf91d6bSwdenk 39546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3955c609719bSwdenk The size in bytes of the EEPROM device. 3956c609719bSwdenk 3957548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3958548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3959548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3960548738b4SHeiko Schocher 3961548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3962548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3963548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3964548738b4SHeiko Schocher EEPROM. For example: 3965548738b4SHeiko Schocher 3966ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3967548738b4SHeiko Schocher 3968548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3969548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3970c609719bSwdenk 3971057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 39725779d8d9Swdenk 39735779d8d9Swdenk Define this if you have a DataFlash memory device which you 39745779d8d9Swdenk want to use for the environment. 39755779d8d9Swdenk 39760e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 39795779d8d9Swdenk 39805779d8d9Swdenk These three #defines specify the offset and size of the 39815779d8d9Swdenk environment area within the total memory of your DataFlash placed 39825779d8d9Swdenk at the specified address. 39835779d8d9Swdenk 39840a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 39850a85a9e7SLiu Gang 39860a85a9e7SLiu Gang Define this if you have a remote memory space which you 39870a85a9e7SLiu Gang want to use for the local device's environment. 39880a85a9e7SLiu Gang 39890a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 39900a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 39910a85a9e7SLiu Gang 39920a85a9e7SLiu Gang These two #defines specify the address and size of the 39930a85a9e7SLiu Gang environment area within the remote memory space. The 39940a85a9e7SLiu Gang local device can get the environment from remote memory 3995fc54c7faSLiu Gang space by SRIO or PCIE links. 39960a85a9e7SLiu Gang 39970a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 39980a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3999fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4000fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 40010a85a9e7SLiu Gang 400251bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 400313a5695bSwdenk 400413a5695bSwdenk Define this if you have a NAND device which you want to use 400513a5695bSwdenk for the environment. 400613a5695bSwdenk 40070e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 40080e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 400913a5695bSwdenk 401013a5695bSwdenk These two #defines specify the offset and size of the environment 4011fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4012fdd813deSScott Wood aligned to an erase block boundary. 40135779d8d9Swdenk 4014fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4015e443c944SMarkus Klotzbuecher 40160e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4017fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4018fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4019fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4020fdd813deSScott Wood aligned to an erase block boundary. 4021e443c944SMarkus Klotzbuecher 4022fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4023fdd813deSScott Wood 4024fdd813deSScott Wood Specifies the length of the region in which the environment 4025fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4026fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4027fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4028fdd813deSScott Wood the range to be avoided. 4029fdd813deSScott Wood 4030fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4031fdd813deSScott Wood 4032fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4033fdd813deSScott Wood environment from block zero's out-of-band data. The 4034fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4035fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4036fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4037e443c944SMarkus Klotzbuecher 4038b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4039b74ab737SGuennadi Liakhovetski 4040b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4041b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4042b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4043b74ab737SGuennadi Liakhovetski 40442b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 40452b74433fSJoe Hershberger 40462b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 40472b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 40482b74433fSJoe Hershberger accesses, which is important on NAND. 40492b74433fSJoe Hershberger 40502b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 40512b74433fSJoe Hershberger 40522b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 40532b74433fSJoe Hershberger 40542b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 40552b74433fSJoe Hershberger 40562b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 40572b74433fSJoe Hershberger environment in. 40582b74433fSJoe Hershberger 4059785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4060785881f7SJoe Hershberger 4061785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4062785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4063785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4064785881f7SJoe Hershberger 40652b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 40662b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 40672b74433fSJoe Hershberger 40682b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 40692b74433fSJoe Hershberger when storing the env in UBI. 40702b74433fSJoe Hershberger 407106e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 407206e4ae5fSStephen Warren 407306e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 407406e4ae5fSStephen Warren environment. 407506e4ae5fSStephen Warren 407606e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 407706e4ae5fSStephen Warren 407806e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 407906e4ae5fSStephen Warren 408006e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 408106e4ae5fSStephen Warren 408206e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 408306e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 408406e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 408506e4ae5fSStephen Warren 408606e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 408706e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 408806e4ae5fSStephen Warren 408906e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 409006e4ae5fSStephen Warren area within the specified MMC device. 409106e4ae5fSStephen Warren 40925c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 40935c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 40945c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 40955c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 40965c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 40975c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 40985c088ee8SStephen Warren maximum possible space before it, to store other data. 40995c088ee8SStephen Warren 410006e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 410106e4ae5fSStephen Warren MMC sector boundary. 410206e4ae5fSStephen Warren 410306e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 410406e4ae5fSStephen Warren 410506e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 410606e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 410706e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 410806e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 410906e4ae5fSStephen Warren 41105c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 41115c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 41125c088ee8SStephen Warren 411306e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 411406e4ae5fSStephen Warren an MMC sector boundary. 411506e4ae5fSStephen Warren 411606e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 411706e4ae5fSStephen Warren 411806e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 411906e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 412006e4ae5fSStephen Warren CONFIG_ENV_SIZE. 412106e4ae5fSStephen Warren 41226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4123c609719bSwdenk 4124c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4125c609719bSwdenk area is used at an early stage (ROM part) if the environment 4126c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4127c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4128c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4129c609719bSwdenk to be a good choice since it makes it far enough from the 4130c609719bSwdenk start of the data area as well as from the stack pointer. 4131c609719bSwdenk 4132e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4133c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4134cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4135c609719bSwdenkuntil then to read environment variables. 4136c609719bSwdenk 413785ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 413885ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 413985ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 414085ec0bccSwdenknecessary, because the first environment variable we need is the 414185ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 414285ec0bccSwdenkhave any device yet where we could complain.] 4143c609719bSwdenk 4144c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4145c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 414685ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4147c609719bSwdenk 41486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4149fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4150fc3e2165Swdenk 41516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4152fc3e2165Swdenk also needs to be defined. 4153fc3e2165Swdenk 41546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4155fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4156c609719bSwdenk 4157f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4158f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4159f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4160f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4161f5675aa5SRon Madrid space for already greatly restricted images, including but not 4162f5675aa5SRon Madrid limited to NAND_SPL configurations. 4163f5675aa5SRon Madrid 4164b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4165b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4166b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4167b2b92f53SSimon Glass to do this. 4168b2b92f53SSimon Glass 4169e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4170e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4171e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4172e2e3e2b1SSimon Glass present. 4173e2e3e2b1SSimon Glass 4174c609719bSwdenkLow Level (hardware related) configuration options: 4175dc7c9a1aSwdenk--------------------------------------------------- 4176c609719bSwdenk 41776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4178c609719bSwdenk Cache Line Size of the CPU. 4179c609719bSwdenk 41806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4181c609719bSwdenk Default address of the IMMR after system reset. 41822535d602Swdenk 41832535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 41842535d602Swdenk and RPXsuper) to be able to adjust the position of 41852535d602Swdenk the IMMR register after a reset. 4186c609719bSwdenk 4187e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4188e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4189e46fedfeSTimur Tabi PowerPC SOCs. 4190e46fedfeSTimur Tabi 4191e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4192e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4193e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4194e46fedfeSTimur Tabi 4195e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4196e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4197e46fedfeSTimur Tabi 4198e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4199e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4200e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4201e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4202e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4203e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4204e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4205e46fedfeSTimur Tabi 4206e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4207e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4208e46fedfeSTimur Tabi 4209e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4210e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4211e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4212e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4213e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4214e46fedfeSTimur Tabi 4215e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4216e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4217e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4218e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4219e46fedfeSTimur Tabi 4220e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4221e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4222e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4223e46fedfeSTimur Tabi 42247f6c2cbcSwdenk- Floppy Disk Support: 42256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 42267f6c2cbcSwdenk 42277f6c2cbcSwdenk the default drive number (default value 0) 42287f6c2cbcSwdenk 42296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 42307f6c2cbcSwdenk 423111ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 42327f6c2cbcSwdenk (default value 1) 42337f6c2cbcSwdenk 42346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 42357f6c2cbcSwdenk 42367f6c2cbcSwdenk defines the offset of register from address. It 42377f6c2cbcSwdenk depends on which part of the data bus is connected to 423811ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 42397f6c2cbcSwdenk 42406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 42416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 42427f6c2cbcSwdenk default value. 42437f6c2cbcSwdenk 42446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 42457f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 42467f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 42477f6c2cbcSwdenk source code. It is used to make hardware dependant 42487f6c2cbcSwdenk initializations. 42497f6c2cbcSwdenk 42500abddf82SMacpaul Lin- CONFIG_IDE_AHB: 42510abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 42520abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 42530abddf82SMacpaul Lin When software is doing ATA command and data transfer to 42540abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 42550abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 42560abddf82SMacpaul Lin is requierd. 42570abddf82SMacpaul Lin 42586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 425925d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 426025d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4261c609719bSwdenk 42626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4263c609719bSwdenk 42647152b1d0Swdenk Start address of memory area that can be used for 4265c609719bSwdenk initial data and stack; please note that this must be 4266c609719bSwdenk writable memory that is working WITHOUT special 4267c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4268c609719bSwdenk will become available only after programming the 4269c609719bSwdenk memory controller and running certain initialization 4270c609719bSwdenk sequences. 4271c609719bSwdenk 4272c609719bSwdenk U-Boot uses the following memory types: 4273c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4274c609719bSwdenk - MPC824X: data cache 4275c609719bSwdenk - PPC4xx: data cache 4276c609719bSwdenk 42776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4278c609719bSwdenk 4279c609719bSwdenk Offset of the initial data structure in the memory 42806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 42816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4282c609719bSwdenk data is located at the end of the available space 4283553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 42846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 42856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 42866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4287c609719bSwdenk 4288c609719bSwdenk Note: 4289c609719bSwdenk On the MPC824X (or other systems that use the data 4290c609719bSwdenk cache for initial memory) the address chosen for 42916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4292c609719bSwdenk point to an otherwise UNUSED address space between 4293c609719bSwdenk the top of RAM and the start of the PCI space. 4294c609719bSwdenk 42956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4296c609719bSwdenk 42976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4298c609719bSwdenk 42996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4300c609719bSwdenk 43016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4302c609719bSwdenk 43036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4304c609719bSwdenk 43056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4306c609719bSwdenk 43076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4308c609719bSwdenk SDRAM timing 4309c609719bSwdenk 43106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4311c609719bSwdenk periodic timer for refresh 4312c609719bSwdenk 43136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4314c609719bSwdenk 43156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 43166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 43176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 43186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4319c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4320c609719bSwdenk 4321c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 43226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 43236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4324c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4325c609719bSwdenk 43266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 43276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4328c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4329c609719bSwdenk Prescaler definitions (SDRAM timing) 4330c609719bSwdenk 43316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4332c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4333c609719bSwdenk define relocation offset in DPRAM [DSP2] 4334c609719bSwdenk 43356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4336b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4337b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4338b423d055SHeiko Schocher 43396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4340c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4341c609719bSwdenk define relocation offset in DPRAM [SCC4] 4342c609719bSwdenk 43436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4344c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4345c609719bSwdenk wrong setting might damage your board. Read 4346c609719bSwdenk doc/README.MBX before setting this variable! 4347c609719bSwdenk 43486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4349ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4350ea909b76Swdenk (Power On Self Tests). This definition overrides 4351ea909b76Swdenk #define'd default value in commproc.h resp. 4352ea909b76Swdenk cpm_8260.h. 4353ea909b76Swdenk 43546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 43556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 43566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 43576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 43586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 43596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 43606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 43616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4362a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 43635d232d0eSwdenk 43649cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 43659cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 43669cacf4fcSDirk Eibach required. 43679cacf4fcSDirk Eibach 436869fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 436969fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 437069fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 437169fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 437269fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 437369fd2d3bSAndrew Sharp by coreboot or similar. 437469fd2d3bSAndrew Sharp 4375842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4376842033e6SGabor Juhos Enable support for indirect PCI bridges. 4377842033e6SGabor Juhos 4378a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4379a09b9b68SKumar Gala Chip has SRIO or not 4380a09b9b68SKumar Gala 4381a09b9b68SKumar Gala- CONFIG_SRIO1: 4382a09b9b68SKumar Gala Board has SRIO 1 port available 4383a09b9b68SKumar Gala 4384a09b9b68SKumar Gala- CONFIG_SRIO2: 4385a09b9b68SKumar Gala Board has SRIO 2 port available 4386a09b9b68SKumar Gala 4387c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4388c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4389c8b28152SLiu Gang 4390a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4391a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4392a09b9b68SKumar Gala 4393a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4394a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4395a09b9b68SKumar Gala 4396a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4397a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4398a09b9b68SKumar Gala 439966bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 440066bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 440166bd1846SFabio Estevam a 16 bit bus. 440266bd1846SFabio Estevam Not all NAND drivers use this symbol. 4403a430e916SFabio Estevam Example of drivers that use it: 440466bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4405a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4406eced4626SAlex Waterman 4407eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4408eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4409eced4626SAlex Waterman a default value will be used. 4410eced4626SAlex Waterman 4411bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4412218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4413218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4414218ca724SWolfgang Denk 4415bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4416bb99ad6dSBen Warren I2C address of the SPD EEPROM 4417bb99ad6dSBen Warren 44186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4419218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4420218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4421218ca724SWolfgang Denk to something your driver can deal with. 4422bb99ad6dSBen Warren 44231b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 44241b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 44251b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 44261b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 44271b3e3c4fSYork Sun header files or board specific files. 44281b3e3c4fSYork Sun 44296f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 44306f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 44316f5e1dc5SYork Sun 44326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4433218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4434218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 44352ad6b513STimur Tabi 4436c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4437c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4438c26e454dSwdenk 4439c26e454dSwdenk- CONFIG_FEC[12]_PHY 4440c26e454dSwdenk Define to the hardcoded PHY address which corresponds 44416e592385Swdenk to the given FEC; i. e. 4442c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4443c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4444c26e454dSwdenk 4445c26e454dSwdenk When set to -1, means to probe for first available. 4446c26e454dSwdenk 4447c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4448c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4449c26e454dSwdenk (so program the FEC to ignore it). 4450c26e454dSwdenk 4451c26e454dSwdenk- CONFIG_RMII 4452c26e454dSwdenk Enable RMII mode for all FECs. 4453c26e454dSwdenk Note that this is a global option, we can't 4454c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4455c26e454dSwdenk 44565cf91d6bSwdenk- CONFIG_CRC32_VERIFY 44575cf91d6bSwdenk Add a verify option to the crc32 command. 44585cf91d6bSwdenk The syntax is: 44595cf91d6bSwdenk 44605cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 44615cf91d6bSwdenk 44625cf91d6bSwdenk Where address/count indicate a memory area 44635cf91d6bSwdenk and crc32 is the correct crc32 which the 44645cf91d6bSwdenk area should have. 44655cf91d6bSwdenk 446656523f12Swdenk- CONFIG_LOOPW 446756523f12Swdenk Add the "loopw" memory command. This only takes effect if 4468602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 446956523f12Swdenk 44707b466641Sstroese- CONFIG_MX_CYCLIC 44717b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 44727b466641Sstroese "md/mw" commands. 44737b466641Sstroese Examples: 44747b466641Sstroese 44757b466641Sstroese => mdc.b 10 4 500 44767b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 44777b466641Sstroese 44787b466641Sstroese => mwc.l 100 12345678 10 44797b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 44807b466641Sstroese 44817b466641Sstroese This only takes effect if the memory commands are activated 4482602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 44837b466641Sstroese 44848aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4485afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4486e03f3169SWolfgang Denk low level initializations (like setting up the memory 4487e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4488e03f3169SWolfgang Denk relocate itself into RAM. 44898aa1a2d1Swdenk 4490e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4491e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4492e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4493e03f3169SWolfgang Denk these initializations itself. 44948aa1a2d1Swdenk 4495401bb30bSAneesh V- CONFIG_SPL_BUILD 4496df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4497df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4498df81238bSMagnus Lilja compiling a NAND SPL. 4499400558b5Swdenk 45003aa29de0SYing Zhang- CONFIG_TPL_BUILD 45013aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 45023aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 45033aa29de0SYing Zhang It is loaded by the SPL. 45043aa29de0SYing Zhang 45055df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 45065df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 45075df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 45085df572f0SYing Zhang previous 4k of the .text section. 45095df572f0SYing Zhang 45104213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 45114213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 45124213fc29SSimon Glass effective address. It is therefore not necessary to regard 45134213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 45144213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 45154213fc29SSimon Glass it maintains its own little RAM buffer which contains all 45164213fc29SSimon Glass addressable memory. This option causes some memory accesses 45174213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 45184213fc29SSimon Glass 4519d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4520d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4521d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4522d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4523d8834a13SMatthias Weisser conditions but may increase the binary size. 4524d8834a13SMatthias Weisser 4525588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4526588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4527588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4528b16f521aSGabe Black 4529fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4530fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4531fc33705eSMark Jackson 4532fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 45335b5ece9eSGabe Black 453416678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 453516678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 453616678eb4SHeiko Schocher 4537f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4538f2717b47STimur Tabi----------------------------------- 4539f2717b47STimur Tabi 4540f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4541f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4542f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4543f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4544f2717b47STimur Tabiwithin that device. 4545f2717b47STimur Tabi 4546dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4547dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4548dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4549dcf1d774SZhao Qiang is also specified. 4550dcf1d774SZhao Qiang 4551dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4552dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4553f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4554f2717b47STimur Tabi is also specified. 4555f2717b47STimur Tabi 4556f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4557f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4558f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4559f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4560f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4561f2717b47STimur Tabi 4562f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4563f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4564f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4565f2717b47STimur Tabi virtual address in NOR flash. 4566f2717b47STimur Tabi 4567f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4568f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4569f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4570f2717b47STimur Tabi 4571f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4572f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4573f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4574f2717b47STimur Tabi 4575f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4576f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4577f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4578f2717b47STimur Tabi 4579292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4580292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4581292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4582fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4583fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4584fc54c7faSLiu Gang master's memory space. 4585f2717b47STimur Tabi 4586c609719bSwdenkBuilding the Software: 4587c609719bSwdenk====================== 4588c609719bSwdenk 4589218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4590218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4591218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4592218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4593218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4594218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4595c609719bSwdenk 4596218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4597218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4598218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4599218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4600218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4601c609719bSwdenk 4602218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4603218ca724SWolfgang Denk $ export CROSS_COMPILE 4604c609719bSwdenk 46052f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 46062f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 46072f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 46082f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 46092f8d396bSPeter Tyser 46102f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 46112f8d396bSPeter Tyser 46122f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 46132f8d396bSPeter Tyser be executed on computers running Windows. 46142f8d396bSPeter Tyser 4615c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4616c609719bSwdenksources you must configure U-Boot for one specific board type. This 4617c609719bSwdenkis done by typing: 4618c609719bSwdenk 4619c609719bSwdenk make NAME_config 4620c609719bSwdenk 4621218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 46224d675ae6SMichael Jonesrations; see boards.cfg for supported names. 462354387ac9Swdenk 4624c609719bSwdenkNote: for some board special configuration names may exist; check if 4625c609719bSwdenk additional information is available from the board vendor; for 46262729af9dSwdenk instance, the TQM823L systems are available without (standard) 46272729af9dSwdenk or with LCD support. You can select such additional "features" 462811ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4629c609719bSwdenk 46302729af9dSwdenk make TQM823L_config 46312729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4632c609719bSwdenk 4633c609719bSwdenk make TQM823L_LCD_config 4634c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4635c609719bSwdenk 4636c609719bSwdenk etc. 4637c609719bSwdenk 4638c609719bSwdenk 4639c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 46407152b1d0Swdenkimages ready for download to / installation on your system: 4641c609719bSwdenk 4642c609719bSwdenk- "u-boot.bin" is a raw binary image 4643c609719bSwdenk- "u-boot" is an image in ELF binary format 4644c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4645c609719bSwdenk 4646baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4647baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4648baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4649baf31249SMarian Balakowicz 4650baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4651baf31249SMarian Balakowicz 4652baf31249SMarian Balakowicz make O=/tmp/build distclean 4653baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4654baf31249SMarian Balakowicz make O=/tmp/build all 4655baf31249SMarian Balakowicz 4656baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4657baf31249SMarian Balakowicz 4658baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4659baf31249SMarian Balakowicz make distclean 4660baf31249SMarian Balakowicz make NAME_config 4661baf31249SMarian Balakowicz make all 4662baf31249SMarian Balakowicz 4663baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4664baf31249SMarian Balakowiczvariable. 4665baf31249SMarian Balakowicz 4666c609719bSwdenk 4667c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4668c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4669c609719bSwdenknative "make". 4670c609719bSwdenk 4671c609719bSwdenk 4672c609719bSwdenkIf the system board that you have is not listed, then you will need 4673c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4674c609719bSwdenksteps: 4675c609719bSwdenk 4676c609719bSwdenk1. Add a new configuration option for your board to the toplevel 46774d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 46784d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4679c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 468085ec0bccSwdenk files you need. In your board directory, you will need at least 468185ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 468285ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 468385ec0bccSwdenk your board 4684c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4685c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 468685ec0bccSwdenk4. Run "make <board>_config" with your new name. 4687c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4688c609719bSwdenk to be installed on your target system. 468985ec0bccSwdenk6. Debug and solve any problems that might arise. 4690c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4691c609719bSwdenk 4692c609719bSwdenk 4693c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4694c609719bSwdenk============================================================== 4695c609719bSwdenk 4696c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4697c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4698c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4699c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4700218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4701c609719bSwdenk 4702c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4703c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4704c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4705c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4706c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 47077152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4708218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4709218ca724SWolfgang Denkyou can type 4710c609719bSwdenk 4711c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4712c609719bSwdenk 4713c609719bSwdenkor to build on a native PowerPC system you can type 4714c609719bSwdenk 4715c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4716c609719bSwdenk 4717218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4718218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4719218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4720218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4721218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4722218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4723218ca724SWolfgang Denkvariable. For example: 4724baf31249SMarian Balakowicz 4725baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4726baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4727baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4728baf31249SMarian Balakowicz 4729218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4730218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4731218ca724SWolfgang Denkduring the whole build process. 4732baf31249SMarian Balakowicz 4733baf31249SMarian Balakowicz 4734c609719bSwdenkSee also "U-Boot Porting Guide" below. 4735c609719bSwdenk 4736c609719bSwdenk 4737c609719bSwdenkMonitor Commands - Overview: 4738c609719bSwdenk============================ 4739c609719bSwdenk 4740c609719bSwdenkgo - start application at address 'addr' 4741c609719bSwdenkrun - run commands in an environment variable 4742c609719bSwdenkbootm - boot application image from memory 4743c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 474444f074c7SMarek Vasutbootz - boot zImage from memory 4745c609719bSwdenktftpboot- boot image via network using TFTP protocol 4746c609719bSwdenk and env variables "ipaddr" and "serverip" 4747c609719bSwdenk (and eventually "gatewayip") 47481fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4749c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4750c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4751c609719bSwdenkloads - load S-Record file over serial line 4752c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4753c609719bSwdenkmd - memory display 4754c609719bSwdenkmm - memory modify (auto-incrementing) 4755c609719bSwdenknm - memory modify (constant address) 4756c609719bSwdenkmw - memory write (fill) 4757c609719bSwdenkcp - memory copy 4758c609719bSwdenkcmp - memory compare 4759c609719bSwdenkcrc32 - checksum calculation 47600f89c54bSPeter Tyseri2c - I2C sub-system 4761c609719bSwdenksspi - SPI utility commands 4762c609719bSwdenkbase - print or set address offset 4763c609719bSwdenkprintenv- print environment variables 4764c609719bSwdenksetenv - set environment variables 4765c609719bSwdenksaveenv - save environment variables to persistent storage 4766c609719bSwdenkprotect - enable or disable FLASH write protection 4767c609719bSwdenkerase - erase FLASH memory 4768c609719bSwdenkflinfo - print FLASH memory information 476910635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4770c609719bSwdenkbdinfo - print Board Info structure 4771c609719bSwdenkiminfo - print header information for application image 4772c609719bSwdenkconinfo - print console devices and informations 4773c609719bSwdenkide - IDE sub-system 4774c609719bSwdenkloop - infinite loop on address range 477556523f12Swdenkloopw - infinite write loop on address range 4776c609719bSwdenkmtest - simple RAM test 4777c609719bSwdenkicache - enable or disable instruction cache 4778c609719bSwdenkdcache - enable or disable data cache 4779c609719bSwdenkreset - Perform RESET of the CPU 4780c609719bSwdenkecho - echo args to console 4781c609719bSwdenkversion - print monitor version 4782c609719bSwdenkhelp - print online help 4783c609719bSwdenk? - alias for 'help' 4784c609719bSwdenk 4785c609719bSwdenk 4786c609719bSwdenkMonitor Commands - Detailed Description: 4787c609719bSwdenk======================================== 4788c609719bSwdenk 4789c609719bSwdenkTODO. 4790c609719bSwdenk 4791c609719bSwdenkFor now: just type "help <command>". 4792c609719bSwdenk 4793c609719bSwdenk 4794c609719bSwdenkEnvironment Variables: 4795c609719bSwdenk====================== 4796c609719bSwdenk 4797c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4798c609719bSwdenkcan be made persistent by saving to Flash memory. 4799c609719bSwdenk 4800c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4801c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4802c609719bSwdenkwithout a value can be used to delete a variable from the 4803c609719bSwdenkenvironment. As long as you don't save the environment you are 4804c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4805c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4806c609719bSwdenk 4807c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4808c96f86eeSWolfgang Denk 4809c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4810c609719bSwdenk 4811c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4812c609719bSwdenk 4813c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4814c609719bSwdenk 4815c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4816c609719bSwdenk 4817c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4818c609719bSwdenk 4819c609719bSwdenk bootfile - Name of the image to load with TFTP 4820c609719bSwdenk 48217d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 48227d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48237d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 48247d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 48257d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 48267d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4827c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4828c3624e6eSGrant Likely bootm_mapsize. 4829c3624e6eSGrant Likely 4830c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4831c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4832c3624e6eSGrant Likely defines the size of the memory region starting at base 4833c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4834c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4835c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4836c3624e6eSGrant Likely used otherwise. 48377d721e34SBartlomiej Sieka 48387d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 48397d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48407d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 48417d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 48427d721e34SBartlomiej Sieka environment variable. 48437d721e34SBartlomiej Sieka 48444bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 48454bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 48464bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 48474bae9090SBartlomiej Sieka 4848c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4849c609719bSwdenk "bootp" will just load perform a lookup of the 4850c609719bSwdenk configuration from the BOOTP server, but not try to 4851c609719bSwdenk load any image using TFTP 4852c609719bSwdenk 4853c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4854c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4855c609719bSwdenk be automatically started (by internally calling 4856c609719bSwdenk "bootm") 4857c609719bSwdenk 48584a6fd34bSwdenk If set to "no", a standalone image passed to the 48594a6fd34bSwdenk "bootm" command will be copied to the load address 48604a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 48614a6fd34bSwdenk This can be used to load and uncompress arbitrary 48624a6fd34bSwdenk data. 48634a6fd34bSwdenk 4864a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4865a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4866fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4867fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4868fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4869fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4870fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4871fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4872fa34f6b2SShawn Guo access it during the boot procedure. 4873fa34f6b2SShawn Guo 4874a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4875a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4876a28afca5SDavid A. Long to work it must reside in writable memory, have 4877a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4878a28afca5SDavid A. Long add the information it needs into it, and the memory 4879a28afca5SDavid A. Long must be accessible by the kernel. 4880a28afca5SDavid A. Long 4881eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4882eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4883eea63e05SSimon Glass defined. 4884eea63e05SSimon Glass 488517ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 488617ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 488717ea1177Swdenk mode (400kHZ). This environment variable is used in 488817ea1177Swdenk initialization code. So, for changes to be effective 488917ea1177Swdenk it must be saved and board must be reset. 489017ea1177Swdenk 4891c609719bSwdenk initrd_high - restrict positioning of initrd images: 4892c609719bSwdenk If this variable is not set, initrd images will be 4893c609719bSwdenk copied to the highest possible address in RAM; this 4894c609719bSwdenk is usually what you want since it allows for 4895c609719bSwdenk maximum initrd size. If for some reason you want to 4896c609719bSwdenk make sure that the initrd image is loaded below the 48976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4898c609719bSwdenk variable to a value of "no" or "off" or "0". 4899c609719bSwdenk Alternatively, you can set it to a maximum upper 4900c609719bSwdenk address to use (U-Boot will still check that it 4901c609719bSwdenk does not overwrite the U-Boot stack and data). 4902c609719bSwdenk 4903c609719bSwdenk For instance, when you have a system with 16 MB 49047152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4905c609719bSwdenk you can do this by adding "mem=12M" to the value of 4906c609719bSwdenk the "bootargs" variable. However, now you must make 49077152b1d0Swdenk sure that the initrd image is placed in the first 4908c609719bSwdenk 12 MB as well - this can be done with 4909c609719bSwdenk 4910c609719bSwdenk setenv initrd_high 00c00000 4911c609719bSwdenk 491238b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 491338b99261Swdenk indication to U-Boot that all addresses are legal 491438b99261Swdenk for the Linux kernel, including addresses in flash 491538b99261Swdenk memory. In this case U-Boot will NOT COPY the 491638b99261Swdenk ramdisk at all. This may be useful to reduce the 491738b99261Swdenk boot time on your system, but requires that this 491838b99261Swdenk feature is supported by your Linux kernel. 491938b99261Swdenk 4920c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4921c609719bSwdenk 4922c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4923dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4924c609719bSwdenk 4925c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4926c609719bSwdenk 4927c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4928c609719bSwdenk 4929c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4930c609719bSwdenk 4931c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4932c609719bSwdenk 4933c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4934c609719bSwdenk 4935e2a53458SMike Frysinger ethprime - controls which interface is used first. 4936a3d991bdSwdenk 4937e2a53458SMike Frysinger ethact - controls which interface is currently active. 4938e2a53458SMike Frysinger For example you can do the following 4939a3d991bdSwdenk 494048690d80SHeiko Schocher => setenv ethact FEC 494148690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 494248690d80SHeiko Schocher => setenv ethact SCC 494348690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4944a3d991bdSwdenk 4945e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4946e1692577SMatthias Fuchs available network interfaces. 4947e1692577SMatthias Fuchs It just stays at the currently selected interface. 4948e1692577SMatthias Fuchs 4949a3d991bdSwdenk netretry - When set to "no" each network operation will 4950a3d991bdSwdenk either succeed or fail without retrying. 49516e592385Swdenk When set to "once" the network operation will 49526e592385Swdenk fail when all the available network interfaces 49536e592385Swdenk are tried once without success. 4954a3d991bdSwdenk Useful on scripts which control the retry operation 4955a3d991bdSwdenk themselves. 4956a3d991bdSwdenk 4957b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4958a1cf027aSJean-Christophe PLAGNIOL-VILLARD 49598d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 49608d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 49618d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 49628d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 49638d51aacdSSimon Glass is silent. 49648d51aacdSSimon Glass 496528cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4966ecb0ccd9SWolfgang Denk UDP source port. 4967ecb0ccd9SWolfgang Denk 496828cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 496928cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 497028cb9375SWolfgang Denk 4971c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4972c96f86eeSWolfgang Denk we use the TFTP server's default block size 4973c96f86eeSWolfgang Denk 4974c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4975c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4976c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4977c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4978c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4979c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4980c96f86eeSWolfgang Denk with unreliable TFTP servers. 4981c96f86eeSWolfgang Denk 4982a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 498311ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4984a3d991bdSwdenk VLAN tagged frames. 4985c609719bSwdenk 4986dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4987dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4988dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4989dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4990dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4991dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4992dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4993dc0b7b0eSJason Hobbs 4994dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4995dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4996dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4997dc0b7b0eSJason Hobbs 4998dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4999dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5000dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5001dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5002dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5003dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5004dc0b7b0eSJason Hobbs 5005c609719bSwdenkThe following environment variables may be used and automatically 5006c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5007c609719bSwdenkdepending the information provided by your boot server: 5008c609719bSwdenk 5009c609719bSwdenk bootfile - see above 5010c609719bSwdenk dnsip - IP address of your Domain Name Server 5011fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5012c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5013c609719bSwdenk hostname - Target hostname 5014c609719bSwdenk ipaddr - see above 5015c609719bSwdenk netmask - Subnet Mask 5016c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5017c609719bSwdenk serverip - see above 5018c609719bSwdenk 5019c609719bSwdenk 5020c609719bSwdenkThere are two special Environment Variables: 5021c609719bSwdenk 5022c609719bSwdenk serial# - contains hardware identification information such 5023c609719bSwdenk as type string and/or serial number 5024c609719bSwdenk ethaddr - Ethernet address 5025c609719bSwdenk 5026c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5027c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5028c609719bSwdenkonce they have been set once. 5029c609719bSwdenk 5030c609719bSwdenk 5031c1551ea8SstroeseFurther special Environment Variables: 5032c1551ea8Sstroese 5033c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5034c1551ea8Sstroese with the "version" command. This variable is 5035c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5036c1551ea8Sstroese 5037c1551ea8Sstroese 5038c609719bSwdenkPlease note that changes to some configuration parameters may take 5039c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5040c609719bSwdenk 5041c609719bSwdenk 5042170ab110SJoe HershbergerCallback functions for environment variables: 5043170ab110SJoe Hershberger--------------------------------------------- 5044170ab110SJoe Hershberger 5045170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5046170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5047170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5048170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5049170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5050170ab110SJoe Hershberger 5051170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5052170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5053170ab110SJoe Hershberger 5054170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5055170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5056170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5057170ab110SJoe Hershbergerassociations. The list must be in the following format: 5058170ab110SJoe Hershberger 5059170ab110SJoe Hershberger entry = variable_name[:callback_name] 5060170ab110SJoe Hershberger list = entry[,list] 5061170ab110SJoe Hershberger 5062170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5063170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5064170ab110SJoe Hershberger 5065170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5066170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5067170ab110SJoe Hershbergeroverride any association in the static list. You can define 5068170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5069170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5070170ab110SJoe Hershberger 5071170ab110SJoe Hershberger 5072f07771ccSwdenkCommand Line Parsing: 5073f07771ccSwdenk===================== 5074f07771ccSwdenk 5075f07771ccSwdenkThere are two different command line parsers available with U-Boot: 50767152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5077f07771ccSwdenk 5078f07771ccSwdenkOld, simple command line parser: 5079f07771ccSwdenk-------------------------------- 5080f07771ccSwdenk 5081f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5082f07771ccSwdenk- several commands on one line, separated by ';' 5083fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5084f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5085f07771ccSwdenk for example: 5086fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5087f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5088f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5089f07771ccSwdenk 5090f07771ccSwdenkHush shell: 5091f07771ccSwdenk----------- 5092f07771ccSwdenk 5093f07771ccSwdenk- similar to Bourne shell, with control structures like 5094f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5095f07771ccSwdenk until...do...done, ... 5096f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5097f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5098f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5099f07771ccSwdenk command 5100f07771ccSwdenk 5101f07771ccSwdenkGeneral rules: 5102f07771ccSwdenk-------------- 5103f07771ccSwdenk 5104f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5105f07771ccSwdenk command) contains several commands separated by semicolon, and 5106f07771ccSwdenk one of these commands fails, then the remaining commands will be 5107f07771ccSwdenk executed anyway. 5108f07771ccSwdenk 5109f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 511011ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5111f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5112f07771ccSwdenk variables are not executed. 5113f07771ccSwdenk 5114c609719bSwdenkNote for Redundant Ethernet Interfaces: 5115c609719bSwdenk======================================= 5116c609719bSwdenk 511711ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5118c609719bSwdenksuch configurations and is capable of automatic selection of a 51197152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5120c609719bSwdenk 5121c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5122c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5123c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5124c609719bSwdenk 5125c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5126c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5127c609719bSwdenkding setting in the environment; if the corresponding environment 5128c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5129c609719bSwdenk 5130c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5131c609719bSwdenk environment, the SROM's address is used. 5132c609719bSwdenk 5133c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5134c609719bSwdenk environment exists, then the value from the environment variable is 5135c609719bSwdenk used. 5136c609719bSwdenk 5137c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5138c609719bSwdenk both addresses are the same, this MAC address is used. 5139c609719bSwdenk 5140c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5141c609719bSwdenk addresses differ, the value from the environment is used and a 5142c609719bSwdenk warning is printed. 5143c609719bSwdenk 5144c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5145c609719bSwdenk is raised. 5146c609719bSwdenk 5147ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5148ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5149ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5150ecee9324SBen WarrenThe naming convention is as follows: 5151ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5152c609719bSwdenk 5153c609719bSwdenkImage Formats: 5154c609719bSwdenk============== 5155c609719bSwdenk 51563310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 51573310c549SMarian Balakowiczimages in two formats: 51583310c549SMarian Balakowicz 51593310c549SMarian BalakowiczNew uImage format (FIT) 51603310c549SMarian Balakowicz----------------------- 51613310c549SMarian Balakowicz 51623310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 51633310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 51643310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 51653310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 51663310c549SMarian Balakowicz 51673310c549SMarian Balakowicz 51683310c549SMarian BalakowiczOld uImage format 51693310c549SMarian Balakowicz----------------- 51703310c549SMarian Balakowicz 51713310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 51723310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 51733310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5174c609719bSwdenk 5175c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5176c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5177f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5178f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5179f5ed9e39SPeter Tyser INTEGRITY). 51807b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5181afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5182afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5183c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5184c609719bSwdenk* Load Address 5185c609719bSwdenk* Entry Point 5186c609719bSwdenk* Image Name 5187c609719bSwdenk* Image Timestamp 5188c609719bSwdenk 5189c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5190c609719bSwdenkand the data portions of the image are secured against corruption by 5191c609719bSwdenkCRC32 checksums. 5192c609719bSwdenk 5193c609719bSwdenk 5194c609719bSwdenkLinux Support: 5195c609719bSwdenk============== 5196c609719bSwdenk 5197c609719bSwdenkAlthough U-Boot should support any OS or standalone application 51987152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5199c609719bSwdenkU-Boot. 5200c609719bSwdenk 5201c609719bSwdenkU-Boot includes many features that so far have been part of some 5202c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5203c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5204c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 52057152b1d0Swdenkserves several purposes: 5206c609719bSwdenk 5207c609719bSwdenk- the same features can be used for other OS or standalone 5208c609719bSwdenk applications (for instance: using compressed images to reduce the 5209c609719bSwdenk Flash memory footprint) 5210c609719bSwdenk 5211c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 52127152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5213c609719bSwdenk 5214c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5215c609719bSwdenk images; of course this also means that different kernel images can 5216c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5217c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5218c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5219c609719bSwdenk software is easier now. 5220c609719bSwdenk 5221c609719bSwdenk 5222c609719bSwdenkLinux HOWTO: 5223c609719bSwdenk============ 5224c609719bSwdenk 5225c609719bSwdenkPorting Linux to U-Boot based systems: 5226c609719bSwdenk--------------------------------------- 5227c609719bSwdenk 5228c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5229c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5230c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5231c609719bSwdenkLinux :-). 5232c609719bSwdenk 5233a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5234c609719bSwdenk 5235c609719bSwdenkJust make sure your machine specific header file (for instance 5236c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 52371dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 52381dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 52396d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5240c609719bSwdenk 5241c609719bSwdenk 5242c609719bSwdenkConfiguring the Linux kernel: 5243c609719bSwdenk----------------------------- 5244c609719bSwdenk 5245c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5246c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5247c609719bSwdenk 5248c609719bSwdenk 5249c609719bSwdenkBuilding a Linux Image: 5250c609719bSwdenk----------------------- 5251c609719bSwdenk 525224ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 525324ee89b9Swdenknot used. If you use recent kernel source, a new build target 525424ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 525524ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 525624ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 525724ee89b9Swdenk100% compatible format. 5258c609719bSwdenk 5259c609719bSwdenkExample: 5260c609719bSwdenk 5261c609719bSwdenk make TQM850L_config 5262c609719bSwdenk make oldconfig 5263c609719bSwdenk make dep 526424ee89b9Swdenk make uImage 5265c609719bSwdenk 526624ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 526724ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 526824ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5269c609719bSwdenk 527024ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 527124ee89b9Swdenk 527224ee89b9Swdenk* convert the kernel into a raw binary image: 527324ee89b9Swdenk 527424ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 527524ee89b9Swdenk -R .note -R .comment \ 527624ee89b9Swdenk -S vmlinux linux.bin 527724ee89b9Swdenk 527824ee89b9Swdenk* compress the binary image: 527924ee89b9Swdenk 528024ee89b9Swdenk gzip -9 linux.bin 528124ee89b9Swdenk 528224ee89b9Swdenk* package compressed binary image for U-Boot: 528324ee89b9Swdenk 528424ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 528524ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 528624ee89b9Swdenk -d linux.bin.gz uImage 528724ee89b9Swdenk 528824ee89b9Swdenk 528924ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 529024ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 529124ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 529224ee89b9Swdenkbyte header containing information about target architecture, 529324ee89b9Swdenkoperating system, image type, compression method, entry points, time 529424ee89b9Swdenkstamp, CRC32 checksums, etc. 529524ee89b9Swdenk 529624ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 529724ee89b9Swdenkprint the header information, or to build new images. 5298c609719bSwdenk 5299c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5300c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5301c609719bSwdenkchecksum verification: 5302c609719bSwdenk 5303c609719bSwdenk tools/mkimage -l image 5304c609719bSwdenk -l ==> list image header information 5305c609719bSwdenk 5306c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5307c609719bSwdenkfrom a "data file" which is used as image payload: 5308c609719bSwdenk 5309c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5310c609719bSwdenk -n name -d data_file image 5311c609719bSwdenk -A ==> set architecture to 'arch' 5312c609719bSwdenk -O ==> set operating system to 'os' 5313c609719bSwdenk -T ==> set image type to 'type' 5314c609719bSwdenk -C ==> set compression type 'comp' 5315c609719bSwdenk -a ==> set load address to 'addr' (hex) 5316c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5317c609719bSwdenk -n ==> set image name to 'name' 5318c609719bSwdenk -d ==> use image data from 'datafile' 5319c609719bSwdenk 532069459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 532169459791Swdenkaddress (0x00000000), but the entry point address depends on the 532269459791Swdenkkernel version: 5323c609719bSwdenk 5324c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 532524ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5326c609719bSwdenk 5327c609719bSwdenkSo a typical call to build a U-Boot image would read: 5328c609719bSwdenk 532924ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 533024ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5331a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 533224ee89b9Swdenk > examples/uImage.TQM850L 533324ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5334c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5335c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5336c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5337c609719bSwdenk Load Address: 0x00000000 533824ee89b9Swdenk Entry Point: 0x00000000 5339c609719bSwdenk 5340c609719bSwdenkTo verify the contents of the image (or check for corruption): 5341c609719bSwdenk 534224ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 534324ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5344c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5345c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5346c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5347c609719bSwdenk Load Address: 0x00000000 534824ee89b9Swdenk Entry Point: 0x00000000 5349c609719bSwdenk 5350c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5351c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5352c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5353c609719bSwdenkneed to be uncompressed: 5354c609719bSwdenk 5355a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 535624ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 535724ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5358a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 535924ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 536024ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5361c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5362c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5363c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5364c609719bSwdenk Load Address: 0x00000000 536524ee89b9Swdenk Entry Point: 0x00000000 5366c609719bSwdenk 5367c609719bSwdenk 5368c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5369c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5370c609719bSwdenk 5371c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5372c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5373c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5374c609719bSwdenk Image Name: Simple Ramdisk Image 5375c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5376c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5377c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5378c609719bSwdenk Load Address: 0x00000000 5379c609719bSwdenk Entry Point: 0x00000000 5380c609719bSwdenk 5381a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5382a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5383a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5384a804b5ceSGuilherme Maciel Ferreirafrom the image: 5385a804b5ceSGuilherme Maciel Ferreira 5386a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5387a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5388a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5389a804b5ceSGuilherme Maciel Ferreira 5390c609719bSwdenk 5391c609719bSwdenkInstalling a Linux Image: 5392c609719bSwdenk------------------------- 5393c609719bSwdenk 5394c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5395c609719bSwdenkyou must convert the image to S-Record format: 5396c609719bSwdenk 5397c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5398c609719bSwdenk 5399c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5400c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5401c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5402c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5403c609719bSwdenkcommand. 5404c609719bSwdenk 5405c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5406c609719bSwdenkTQM8xxL is in the first Flash bank): 5407c609719bSwdenk 5408c609719bSwdenk => erase 40100000 401FFFFF 5409c609719bSwdenk 5410c609719bSwdenk .......... done 5411c609719bSwdenk Erased 8 sectors 5412c609719bSwdenk 5413c609719bSwdenk => loads 40100000 5414c609719bSwdenk ## Ready for S-Record download ... 5415c609719bSwdenk ~>examples/image.srec 5416c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5417c609719bSwdenk ... 5418c609719bSwdenk 15989 15990 15991 15992 5419c609719bSwdenk [file transfer complete] 5420c609719bSwdenk [connected] 5421c609719bSwdenk ## Start Addr = 0x00000000 5422c609719bSwdenk 5423c609719bSwdenk 5424c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5425c609719bSwdenkthis includes a checksum verification so you can be sure no data 5426c609719bSwdenkcorruption happened: 5427c609719bSwdenk 5428c609719bSwdenk => imi 40100000 5429c609719bSwdenk 5430c609719bSwdenk ## Checking Image at 40100000 ... 5431c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5432c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5433c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5434c609719bSwdenk Load Address: 00000000 5435c609719bSwdenk Entry Point: 0000000c 5436c609719bSwdenk Verifying Checksum ... OK 5437c609719bSwdenk 5438c609719bSwdenk 5439c609719bSwdenkBoot Linux: 5440c609719bSwdenk----------- 5441c609719bSwdenk 5442c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5443c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5444c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5445c609719bSwdenkparameters. You can check and modify this variable using the 5446c609719bSwdenk"printenv" and "setenv" commands: 5447c609719bSwdenk 5448c609719bSwdenk 5449c609719bSwdenk => printenv bootargs 5450c609719bSwdenk bootargs=root=/dev/ram 5451c609719bSwdenk 5452c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5453c609719bSwdenk 5454c609719bSwdenk => printenv bootargs 5455c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5456c609719bSwdenk 5457c609719bSwdenk => bootm 40020000 5458c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5459c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5460c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5461c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5462c609719bSwdenk Load Address: 00000000 5463c609719bSwdenk Entry Point: 0000000c 5464c609719bSwdenk Verifying Checksum ... OK 5465c609719bSwdenk Uncompressing Kernel Image ... OK 5466c609719bSwdenk 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 5467c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5468c609719bSwdenk time_init: decrementer frequency = 187500000/60 5469c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5470c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5471c609719bSwdenk ... 5472c609719bSwdenk 547311ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 54747152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5475c609719bSwdenkformat!) to the "bootm" command: 5476c609719bSwdenk 5477c609719bSwdenk => imi 40100000 40200000 5478c609719bSwdenk 5479c609719bSwdenk ## Checking Image at 40100000 ... 5480c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5481c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5482c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5483c609719bSwdenk Load Address: 00000000 5484c609719bSwdenk Entry Point: 0000000c 5485c609719bSwdenk Verifying Checksum ... OK 5486c609719bSwdenk 5487c609719bSwdenk ## Checking Image at 40200000 ... 5488c609719bSwdenk Image Name: Simple Ramdisk Image 5489c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5490c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5491c609719bSwdenk Load Address: 00000000 5492c609719bSwdenk Entry Point: 00000000 5493c609719bSwdenk Verifying Checksum ... OK 5494c609719bSwdenk 5495c609719bSwdenk => bootm 40100000 40200000 5496c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5497c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5498c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5499c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5500c609719bSwdenk Load Address: 00000000 5501c609719bSwdenk Entry Point: 0000000c 5502c609719bSwdenk Verifying Checksum ... OK 5503c609719bSwdenk Uncompressing Kernel Image ... OK 5504c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5505c609719bSwdenk Image Name: Simple Ramdisk Image 5506c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5507c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5508c609719bSwdenk Load Address: 00000000 5509c609719bSwdenk Entry Point: 00000000 5510c609719bSwdenk Verifying Checksum ... OK 5511c609719bSwdenk Loading Ramdisk ... OK 5512c609719bSwdenk 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 5513c609719bSwdenk Boot arguments: root=/dev/ram 5514c609719bSwdenk time_init: decrementer frequency = 187500000/60 5515c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5516c609719bSwdenk ... 5517c609719bSwdenk RAMDISK: Compressed image found at block 0 5518c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5519c609719bSwdenk 5520c609719bSwdenk bash# 5521c609719bSwdenk 55220267768eSMatthew McClintockBoot Linux and pass a flat device tree: 55230267768eSMatthew McClintock----------- 55240267768eSMatthew McClintock 55250267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 55260267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 55270267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 55280267768eSMatthew McClintockflat device tree: 55290267768eSMatthew McClintock 55300267768eSMatthew McClintock=> print oftaddr 55310267768eSMatthew McClintockoftaddr=0x300000 55320267768eSMatthew McClintock=> print oft 55330267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 55340267768eSMatthew McClintock=> tftp $oftaddr $oft 55350267768eSMatthew McClintockSpeed: 1000, full duplex 55360267768eSMatthew McClintockUsing TSEC0 device 55370267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 55380267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 55390267768eSMatthew McClintockLoad address: 0x300000 55400267768eSMatthew McClintockLoading: # 55410267768eSMatthew McClintockdone 55420267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 55430267768eSMatthew McClintock=> tftp $loadaddr $bootfile 55440267768eSMatthew McClintockSpeed: 1000, full duplex 55450267768eSMatthew McClintockUsing TSEC0 device 55460267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 55470267768eSMatthew McClintockFilename 'uImage'. 55480267768eSMatthew McClintockLoad address: 0x200000 55490267768eSMatthew McClintockLoading:############ 55500267768eSMatthew McClintockdone 55510267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 55520267768eSMatthew McClintock=> print loadaddr 55530267768eSMatthew McClintockloadaddr=200000 55540267768eSMatthew McClintock=> print oftaddr 55550267768eSMatthew McClintockoftaddr=0x300000 55560267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 55570267768eSMatthew McClintock## Booting image at 00200000 ... 55580267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 55590267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 55600267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 55610267768eSMatthew McClintock Load Address: 00000000 55620267768eSMatthew McClintock Entry Point: 00000000 55630267768eSMatthew McClintock Verifying Checksum ... OK 55640267768eSMatthew McClintock Uncompressing Kernel Image ... OK 55650267768eSMatthew McClintockBooting using flat device tree at 0x300000 55660267768eSMatthew McClintockUsing MPC85xx ADS machine description 55670267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 55680267768eSMatthew McClintock[snip] 55690267768eSMatthew McClintock 55700267768eSMatthew McClintock 55716069ff26SwdenkMore About U-Boot Image Types: 55726069ff26Swdenk------------------------------ 55736069ff26Swdenk 55746069ff26SwdenkU-Boot supports the following image types: 55756069ff26Swdenk 55766069ff26Swdenk "Standalone Programs" are directly runnable in the environment 55776069ff26Swdenk provided by U-Boot; it is expected that (if they behave 55786069ff26Swdenk well) you can continue to work in U-Boot after return from 55796069ff26Swdenk the Standalone Program. 55806069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 55816069ff26Swdenk will take over control completely. Usually these programs 55826069ff26Swdenk will install their own set of exception handlers, device 55836069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 55846069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 55856069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 55866069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 55876069ff26Swdenk being started. 55886069ff26Swdenk "Multi-File Images" contain several images, typically an OS 55896069ff26Swdenk (Linux) kernel image and one or more data images like 55906069ff26Swdenk RAMDisks. This construct is useful for instance when you want 55916069ff26Swdenk to boot over the network using BOOTP etc., where the boot 55926069ff26Swdenk server provides just a single image file, but you want to get 55936069ff26Swdenk for instance an OS kernel and a RAMDisk image. 55946069ff26Swdenk 55956069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 55966069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 55976069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 55986069ff26Swdenk Immediately after the terminating 0 follow the images, one by 55996069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 56006069ff26Swdenk a multiple of 4 bytes). 56016069ff26Swdenk 56026069ff26Swdenk "Firmware Images" are binary images containing firmware (like 56036069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 56046069ff26Swdenk flash memory. 56056069ff26Swdenk 56066069ff26Swdenk "Script files" are command sequences that will be executed by 56076069ff26Swdenk U-Boot's command interpreter; this feature is especially 56086069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 56096069ff26Swdenk as command interpreter. 56106069ff26Swdenk 561144f074c7SMarek VasutBooting the Linux zImage: 561244f074c7SMarek Vasut------------------------- 561344f074c7SMarek Vasut 561444f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 561544f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 561644f074c7SMarek Vasutas the syntax of "bootm" command. 561744f074c7SMarek Vasut 56188ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5619017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5620017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5621017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5622017e1f3fSMarek Vasut 5623c609719bSwdenk 5624c609719bSwdenkStandalone HOWTO: 5625c609719bSwdenk================= 5626c609719bSwdenk 5627c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5628c609719bSwdenkrun "standalone" applications, which can use some resources of 5629c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5630c609719bSwdenk 5631c609719bSwdenkTwo simple examples are included with the sources: 5632c609719bSwdenk 5633c609719bSwdenk"Hello World" Demo: 5634c609719bSwdenk------------------- 5635c609719bSwdenk 5636c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5637c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5638c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5639c609719bSwdenklike that: 5640c609719bSwdenk 5641c609719bSwdenk => loads 5642c609719bSwdenk ## Ready for S-Record download ... 5643c609719bSwdenk ~>examples/hello_world.srec 5644c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5645c609719bSwdenk [file transfer complete] 5646c609719bSwdenk [connected] 5647c609719bSwdenk ## Start Addr = 0x00040004 5648c609719bSwdenk 5649c609719bSwdenk => go 40004 Hello World! This is a test. 5650c609719bSwdenk ## Starting application at 0x00040004 ... 5651c609719bSwdenk Hello World 5652c609719bSwdenk argc = 7 5653c609719bSwdenk argv[0] = "40004" 5654c609719bSwdenk argv[1] = "Hello" 5655c609719bSwdenk argv[2] = "World!" 5656c609719bSwdenk argv[3] = "This" 5657c609719bSwdenk argv[4] = "is" 5658c609719bSwdenk argv[5] = "a" 5659c609719bSwdenk argv[6] = "test." 5660c609719bSwdenk argv[7] = "<NULL>" 5661c609719bSwdenk Hit any key to exit ... 5662c609719bSwdenk 5663c609719bSwdenk ## Application terminated, rc = 0x0 5664c609719bSwdenk 5665c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5666c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5667c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5668c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5669c609719bSwdenkcharacter, but this is just a demo program. The application can be 5670c609719bSwdenkcontrolled by the following keys: 5671c609719bSwdenk 5672c609719bSwdenk ? - print current values og the CPM Timer registers 5673c609719bSwdenk b - enable interrupts and start timer 5674c609719bSwdenk e - stop timer and disable interrupts 5675c609719bSwdenk q - quit application 5676c609719bSwdenk 5677c609719bSwdenk => loads 5678c609719bSwdenk ## Ready for S-Record download ... 5679c609719bSwdenk ~>examples/timer.srec 5680c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5681c609719bSwdenk [file transfer complete] 5682c609719bSwdenk [connected] 5683c609719bSwdenk ## Start Addr = 0x00040004 5684c609719bSwdenk 5685c609719bSwdenk => go 40004 5686c609719bSwdenk ## Starting application at 0x00040004 ... 5687c609719bSwdenk TIMERS=0xfff00980 5688c609719bSwdenk Using timer 1 5689c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5690c609719bSwdenk 5691c609719bSwdenkHit 'b': 5692c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5693c609719bSwdenk Enabling timer 5694c609719bSwdenkHit '?': 5695c609719bSwdenk [q, b, e, ?] ........ 5696c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5697c609719bSwdenkHit '?': 5698c609719bSwdenk [q, b, e, ?] . 5699c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5700c609719bSwdenkHit '?': 5701c609719bSwdenk [q, b, e, ?] . 5702c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5703c609719bSwdenkHit '?': 5704c609719bSwdenk [q, b, e, ?] . 5705c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5706c609719bSwdenkHit 'e': 5707c609719bSwdenk [q, b, e, ?] ...Stopping timer 5708c609719bSwdenkHit 'q': 5709c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5710c609719bSwdenk 5711c609719bSwdenk 571285ec0bccSwdenkMinicom warning: 571385ec0bccSwdenk================ 571485ec0bccSwdenk 57157152b1d0SwdenkOver time, many people have reported problems when trying to use the 571685ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 571785ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5718f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 571985ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5720e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5721e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5722e53515a2SKarl O. Pincfor help with kermit. 5723e53515a2SKarl O. Pinc 572485ec0bccSwdenk 572552f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 572652f52c14Swdenkconfiguration to your "File transfer protocols" section: 572752f52c14Swdenk 572852f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 572952f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 573052f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 573152f52c14Swdenk 573252f52c14Swdenk 5733c609719bSwdenkNetBSD Notes: 5734c609719bSwdenk============= 5735c609719bSwdenk 5736c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5737c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5738c609719bSwdenk 5739c609719bSwdenkBuilding requires a cross environment; it is known to work on 5740c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5741c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5742c609719bSwdenkNote that the cross-powerpc package does not install include files; 5743c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5744c609719bSwdenkmissing. This file has to be installed and patched manually: 5745c609719bSwdenk 5746c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5747c609719bSwdenk # mkdir powerpc 5748c609719bSwdenk # ln -s powerpc machine 5749c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5750c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5751c609719bSwdenk 5752c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5753c609719bSwdenkand U-Boot include files. 5754c609719bSwdenk 5755c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5756c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5757c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5758c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 57592a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5760c609719bSwdenk 5761c609719bSwdenk 5762c609719bSwdenkImplementation Internals: 5763c609719bSwdenk========================= 5764c609719bSwdenk 5765c609719bSwdenkThe following is not intended to be a complete description of every 5766c609719bSwdenkimplementation detail. However, it should help to understand the 5767c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5768c609719bSwdenkhardware. 5769c609719bSwdenk 5770c609719bSwdenk 5771c609719bSwdenkInitial Stack, Global Data: 5772c609719bSwdenk--------------------------- 5773c609719bSwdenk 5774c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5775c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5776c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5777c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5778c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5779c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5780c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5781c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5782c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5783c609719bSwdenklocked as (mis-) used as memory, etc. 5784c609719bSwdenk 57857152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 57860668236bSWolfgang Denk U-Boot mailing list: 578743d9616cSwdenk 578843d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 578943d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 579043d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 579143d9616cSwdenk ... 579243d9616cSwdenk 579343d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 579443d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 579543d9616cSwdenk require any physical RAM backing up the cache. The cleverness 579643d9616cSwdenk is that the cache is being used as a temporary supply of 579743d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 579811ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 579943d9616cSwdenk can see how this works by studying the cache architecture and 580043d9616cSwdenk operation in the architecture and processor-specific manuals. 580143d9616cSwdenk 580243d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 580343d9616cSwdenk is another option for the system designer to use as an 580411ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 580543d9616cSwdenk option should work for you. Using CS 4 should be fine if your 580643d9616cSwdenk board designers haven't used it for something that would 580743d9616cSwdenk cause you grief during the initial boot! It is frequently not 580843d9616cSwdenk used. 580943d9616cSwdenk 58106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 581143d9616cSwdenk with your processor/board/system design. The default value 581243d9616cSwdenk you will find in any recent u-boot distribution in 58138a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 581443d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 581543d9616cSwdenk it above 400_0000. Just make sure your board has no resources 581643d9616cSwdenk that are supposed to respond to that address! That code in 581743d9616cSwdenk start.S has been around a while and should work as is when 581843d9616cSwdenk you get the config right. 581943d9616cSwdenk 582043d9616cSwdenk -Chris Hallinan 582143d9616cSwdenk DS4.COM, Inc. 582243d9616cSwdenk 5823c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5824c609719bSwdenkcode for the initialization procedures: 5825c609719bSwdenk 5826c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5827c609719bSwdenk to write it. 5828c609719bSwdenk 582911ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5830c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 58317152b1d0Swdenk zation is performed later (when relocating to RAM). 5832c609719bSwdenk 5833c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5834c609719bSwdenk that. 5835c609719bSwdenk 5836c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5837c609719bSwdenknormal global data to share information beween the code. But it 5838c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5839c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5840c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5841c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5842c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5843c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5844c609719bSwdenkreserve for this purpose. 5845c609719bSwdenk 58467152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5847c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5848c609719bSwdenkGCC's implementation. 5849c609719bSwdenk 5850c609719bSwdenkFor PowerPC, the following registers have specific use: 5851c609719bSwdenk R1: stack pointer 5852e7670f6cSWolfgang Denk R2: reserved for system use 5853c609719bSwdenk R3-R4: parameter passing and return values 5854c609719bSwdenk R5-R10: parameter passing 5855c609719bSwdenk R13: small data area pointer 5856c609719bSwdenk R30: GOT pointer 5857c609719bSwdenk R31: frame pointer 5858c609719bSwdenk 5859e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5860e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5861e6bee808SJoakim Tjernlund going back and forth between asm and C) 5862c609719bSwdenk 5863e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5864c609719bSwdenk 5865c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5866c609719bSwdenk address of the global data structure is known at compile time), 5867c609719bSwdenk but it turned out that reserving a register results in somewhat 5868c609719bSwdenk smaller code - although the code savings are not that big (on 5869c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5870c609719bSwdenk 624 text + 127 data). 5871c609719bSwdenk 5872c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 58734c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 58744c58eb55SMike Frysinger 5875c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 58764c58eb55SMike Frysinger 5877c609719bSwdenkOn ARM, the following registers are used: 5878c609719bSwdenk 5879c609719bSwdenk R0: function argument word/integer result 5880c609719bSwdenk R1-R3: function argument word 588112eba1b4SJeroen Hofstee R9: platform specific 588212eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 5883c609719bSwdenk R11: argument (frame) pointer 5884c609719bSwdenk R12: temporary workspace 5885c609719bSwdenk R13: stack pointer 5886c609719bSwdenk R14: link register 5887c609719bSwdenk R15: program counter 5888c609719bSwdenk 588912eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 589012eba1b4SJeroen Hofstee 589112eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 5892c609719bSwdenk 58930df01fd3SThomas ChouOn Nios II, the ABI is documented here: 58940df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 58950df01fd3SThomas Chou 58960df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 58970df01fd3SThomas Chou 58980df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 58990df01fd3SThomas Chou to access small data sections, so gp is free. 59000df01fd3SThomas Chou 5901afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5902afc1ce82SMacpaul Lin 5903afc1ce82SMacpaul Lin R0-R1: argument/return 5904afc1ce82SMacpaul Lin R2-R5: argument 5905afc1ce82SMacpaul Lin R15: temporary register for assembler 5906afc1ce82SMacpaul Lin R16: trampoline register 5907afc1ce82SMacpaul Lin R28: frame pointer (FP) 5908afc1ce82SMacpaul Lin R29: global pointer (GP) 5909afc1ce82SMacpaul Lin R30: link register (LP) 5910afc1ce82SMacpaul Lin R31: stack pointer (SP) 5911afc1ce82SMacpaul Lin PC: program counter (PC) 5912afc1ce82SMacpaul Lin 5913afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5914afc1ce82SMacpaul Lin 5915d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5916d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5917c609719bSwdenk 5918c609719bSwdenkMemory Management: 5919c609719bSwdenk------------------ 5920c609719bSwdenk 5921c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5922c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5923c609719bSwdenk 5924c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5925c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5926c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5927c609719bSwdenkphysical memory banks. 5928c609719bSwdenk 5929c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5930c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5931c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5932c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 59336d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5934c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5935c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5936c609719bSwdenk 5937c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5938c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5939c609719bSwdenk 5940c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5941c609719bSwdenkthis: 5942c609719bSwdenk 5943c609719bSwdenk 0x0000 0000 Exception Vector code 5944c609719bSwdenk : 5945c609719bSwdenk 0x0000 1FFF 5946c609719bSwdenk 0x0000 2000 Free for Application Use 5947c609719bSwdenk : 5948c609719bSwdenk : 5949c609719bSwdenk 5950c609719bSwdenk : 5951c609719bSwdenk : 5952c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5953c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5954c609719bSwdenk 0x00FC 0000 Malloc Arena 5955c609719bSwdenk : 5956c609719bSwdenk 0x00FD FFFF 5957c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5958c609719bSwdenk ... eventually: LCD or video framebuffer 5959c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5960c609719bSwdenk 0x00FF FFFF [End of RAM] 5961c609719bSwdenk 5962c609719bSwdenk 5963c609719bSwdenkSystem Initialization: 5964c609719bSwdenk---------------------- 5965c609719bSwdenk 5966c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 596711ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5968c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 59697152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5970c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5971c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5972c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5973c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5974c609719bSwdenkthe caches and the SIU. 5975c609719bSwdenk 5976c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5977c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5978c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5979c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5980c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5981c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5982c609719bSwdenkbanks. 5983c609719bSwdenk 5984c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 59857152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5986c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5987c609719bSwdenk0x00000000, with any additional banks following immediately to create 5988c609719bSwdenkcontiguous memory starting from 0. 5989c609719bSwdenk 5990c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5991c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5992c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5993c609719bSwdenkpages, and the final stack is set up. 5994c609719bSwdenk 5995c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5996c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5997c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5998c609719bSwdenknew address in RAM. 5999c609719bSwdenk 6000c609719bSwdenk 6001c609719bSwdenkU-Boot Porting Guide: 6002c609719bSwdenk---------------------- 6003c609719bSwdenk 6004c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 60056aff3115Swdenklist, October 2002] 6006c609719bSwdenk 6007c609719bSwdenk 6008c609719bSwdenkint main(int argc, char *argv[]) 6009c609719bSwdenk{ 6010c609719bSwdenk sighandler_t no_more_time; 6011c609719bSwdenk 6012c609719bSwdenk signal(SIGALRM, no_more_time); 6013c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6014c609719bSwdenk 6015c609719bSwdenk if (available_money > available_manpower) { 60166c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6017c609719bSwdenk return 0; 6018c609719bSwdenk } 6019c609719bSwdenk 6020c609719bSwdenk Download latest U-Boot source; 6021c609719bSwdenk 60220668236bSWolfgang Denk Subscribe to u-boot mailing list; 60236aff3115Swdenk 60246c3fef28SJerry Van Baren if (clueless) 6025c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6026c609719bSwdenk 6027c609719bSwdenk while (learning) { 6028c609719bSwdenk Read the README file in the top level directory; 60297cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 60306c3fef28SJerry Van Baren Read applicable doc/*.README; 6031c609719bSwdenk Read the source, Luke; 60326c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6033c609719bSwdenk } 6034c609719bSwdenk 60356c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 60366c3fef28SJerry Van Baren Buy a BDI3000; 60376c3fef28SJerry Van Baren else 6038c609719bSwdenk Add a lot of aggravation and time; 6039c609719bSwdenk 60406c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 60416c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 60426c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 60436c3fef28SJerry Van Baren } else { 6044c609719bSwdenk Create your own board support subdirectory; 60456c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 60466c3fef28SJerry Van Baren } 60476c3fef28SJerry Van Baren Edit new board/<myboard> files 60486c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6049c609719bSwdenk 60506c3fef28SJerry Van Baren while (!accepted) { 6051c609719bSwdenk while (!running) { 6052c609719bSwdenk do { 6053c609719bSwdenk Add / modify source code; 6054c609719bSwdenk } until (compiles); 6055c609719bSwdenk Debug; 6056c609719bSwdenk if (clueless) 6057c609719bSwdenk email("Hi, I am having problems..."); 6058c609719bSwdenk } 60596c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 60606c3fef28SJerry Van Baren if (reasonable critiques) 60616c3fef28SJerry Van Baren Incorporate improvements from email list code review; 60626c3fef28SJerry Van Baren else 60636c3fef28SJerry Van Baren Defend code as written; 60646c3fef28SJerry Van Baren } 6065c609719bSwdenk 6066c609719bSwdenk return 0; 6067c609719bSwdenk} 6068c609719bSwdenk 6069c609719bSwdenkvoid no_more_time (int sig) 6070c609719bSwdenk{ 6071c609719bSwdenk hire_a_guru(); 6072c609719bSwdenk} 6073c609719bSwdenk 6074c609719bSwdenk 6075c609719bSwdenkCoding Standards: 6076c609719bSwdenk----------------- 6077c609719bSwdenk 6078c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 60792c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 60807ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6081c609719bSwdenk 60822c051651SDetlev ZundelSource files originating from a different project (for example the 60832c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 60842c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 60852c051651SDetlev Zundelsources. 60862c051651SDetlev Zundel 60872c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 60882c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 60892c051651SDetlev Zundelin your code. 6090c609719bSwdenk 6091c178d3daSwdenkPlease also stick to the following formatting rules: 6092180d3f74Swdenk- remove any trailing white space 60937ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6094180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 60957ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6096180d3f74Swdenk- do not add trailing empty lines to source files 6097180d3f74Swdenk 6098c609719bSwdenkSubmissions which do not conform to the standards may be returned 6099c609719bSwdenkwith a request to reformat the changes. 6100c609719bSwdenk 6101c609719bSwdenk 6102c609719bSwdenkSubmitting Patches: 6103c609719bSwdenk------------------- 6104c609719bSwdenk 6105c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6106c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6107c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6108c609719bSwdenk 61090d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6110218ca724SWolfgang Denk 61110668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 61120668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 61130668236bSWolfgang Denk 6114c609719bSwdenkWhen you send a patch, please include the following information with 6115c609719bSwdenkit: 6116c609719bSwdenk 6117c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6118c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6119c609719bSwdenk patch actually fixes something. 6120c609719bSwdenk 6121c609719bSwdenk* For new features: a description of the feature and your 6122c609719bSwdenk implementation. 6123c609719bSwdenk 6124c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6125c609719bSwdenk 6126c609719bSwdenk* For major contributions, your entry to the CREDITS file 6127c609719bSwdenk 612827af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 612927af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6130c609719bSwdenk 6131c609719bSwdenk* If your patch adds new configuration options, don't forget to 6132c609719bSwdenk document these in the README file. 6133c609719bSwdenk 6134218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6135218ca724SWolfgang Denk recommended) you can easily generate the patch using the 61367ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6137218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6138218ca724SWolfgang Denk with some other mail clients. 6139c609719bSwdenk 6140218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6141218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6142218ca724SWolfgang Denk GNU diff. 61436dff5529Swdenk 6144218ca724SWolfgang Denk The current directory when running this command shall be the parent 6145218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6146218ca724SWolfgang Denk your patch includes sufficient directory information for the 6147218ca724SWolfgang Denk affected files). 6148218ca724SWolfgang Denk 6149218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6150218ca724SWolfgang Denk and compressed attachments must not be used. 6151c609719bSwdenk 615252f52c14Swdenk* If one logical set of modifications affects or creates several 615352f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 615452f52c14Swdenk 615552f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 615652f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 615752f52c14Swdenk 615852f52c14Swdenk 6159c609719bSwdenkNotes: 6160c609719bSwdenk 6161c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6162c609719bSwdenk source tree and make sure that no errors or warnings are reported 6163c609719bSwdenk for any of the boards. 6164c609719bSwdenk 6165c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6166c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6167c609719bSwdenk returned with a request to re-formatting / split it. 6168c609719bSwdenk 6169c609719bSwdenk* If you modify existing code, make sure that your new code does not 6170c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6171c609719bSwdenk When adding new features, these should compile conditionally only 6172c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6173c609719bSwdenk disabled must not need more memory than the old code without your 6174c609719bSwdenk modification. 617590dc6704Swdenk 61760668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 61770668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 61780668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 61790668236bSWolfgang Denk bigger than the size limit should be avoided. 6180