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 38218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS 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 1358d321b81SPeter Tyser /arm Files generic to ARM architecture 1368d321b81SPeter Tyser /cpu CPU specific files 1378d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1388d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1396eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1408d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1418d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1428d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 1438d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1448d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1458d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 1468d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1478d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 1488d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1498d321b81SPeter Tyser /lib Architecture specific library files 1508d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1518d321b81SPeter Tyser /cpu CPU specific files 1528d321b81SPeter Tyser /lib Architecture specific library files 1538d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1548d321b81SPeter Tyser /cpu CPU specific files 1558d321b81SPeter Tyser /lib Architecture specific library files 156fea25720SGraeme Russ /x86 Files generic to x86 architecture 1578d321b81SPeter Tyser /cpu CPU specific files 1588d321b81SPeter Tyser /lib Architecture specific library files 1598d321b81SPeter Tyser /m68k Files generic to m68k architecture 1608d321b81SPeter Tyser /cpu CPU specific files 1618d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1628d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1638d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1648d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1658d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1668d321b81SPeter Tyser /lib Architecture specific library files 1678d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1688d321b81SPeter Tyser /cpu CPU specific files 1698d321b81SPeter Tyser /lib Architecture specific library files 1708d321b81SPeter Tyser /mips Files generic to MIPS architecture 1718d321b81SPeter Tyser /cpu CPU specific files 17292bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 17380421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 1748d321b81SPeter Tyser /lib Architecture specific library files 175afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 176afc1ce82SMacpaul Lin /cpu CPU specific files 177afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 178afc1ce82SMacpaul Lin /lib Architecture specific library files 1798d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1808d321b81SPeter Tyser /cpu CPU specific files 1818d321b81SPeter Tyser /lib Architecture specific library files 182a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1838d321b81SPeter Tyser /cpu CPU specific files 1848d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1858d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1868d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1878d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1888d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 1898d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 1908d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 1918d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 1928d321b81SPeter Tyser /lib Architecture specific library files 1938d321b81SPeter Tyser /sh Files generic to SH architecture 1948d321b81SPeter Tyser /cpu CPU specific files 1958d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 1968d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 1978d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 1988d321b81SPeter Tyser /lib Architecture specific library files 1998d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2008d321b81SPeter Tyser /cpu CPU specific files 2018d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2028d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2038d321b81SPeter Tyser /lib Architecture specific library files 2048d321b81SPeter Tyser/api Machine/arch independent API for external apps 2058d321b81SPeter Tyser/board Board dependent files 2068d321b81SPeter Tyser/common Misc architecture independent functions 2078d321b81SPeter Tyser/disk Code for disk drive partition handling 2088d321b81SPeter Tyser/doc Documentation (don't expect too much) 2098d321b81SPeter Tyser/drivers Commonly used device drivers 2108d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2118d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2128d321b81SPeter Tyser/include Header Files 2138d321b81SPeter Tyser/lib Files generic to all architectures 2148d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2158d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2168d321b81SPeter Tyser /lzo Library files to support LZO decompression 2178d321b81SPeter Tyser/net Networking code 2188d321b81SPeter Tyser/post Power On Self Test 2198d321b81SPeter Tyser/rtc Real Time Clock drivers 2208d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 221c609719bSwdenk 222c609719bSwdenkSoftware Configuration: 223c609719bSwdenk======================= 224c609719bSwdenk 225c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 226c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 227c609719bSwdenk 228c609719bSwdenkThere are two classes of configuration variables: 229c609719bSwdenk 230c609719bSwdenk* Configuration _OPTIONS_: 231c609719bSwdenk These are selectable by the user and have names beginning with 232c609719bSwdenk "CONFIG_". 233c609719bSwdenk 234c609719bSwdenk* Configuration _SETTINGS_: 235c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 236c609719bSwdenk you don't know what you're doing; they have names beginning with 2376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 238c609719bSwdenk 239c609719bSwdenkLater we will add a configuration tool - probably similar to or even 240c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 241c609719bSwdenkdo the configuration by hand, which means creating some symbolic 242c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 243c609719bSwdenkas an example here. 244c609719bSwdenk 245c609719bSwdenk 246c609719bSwdenkSelection of Processor Architecture and Board Type: 247c609719bSwdenk--------------------------------------------------- 248c609719bSwdenk 249c609719bSwdenkFor all supported boards there are ready-to-use default 250c609719bSwdenkconfigurations available; just type "make <board_name>_config". 251c609719bSwdenk 252c609719bSwdenkExample: For a TQM823L module type: 253c609719bSwdenk 254c609719bSwdenk cd u-boot 255c609719bSwdenk make TQM823L_config 256c609719bSwdenk 25711ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 258c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 259c609719bSwdenkdirectory according to the instructions in cogent/README. 260c609719bSwdenk 261c609719bSwdenk 262c609719bSwdenkConfiguration Options: 263c609719bSwdenk---------------------- 264c609719bSwdenk 265c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 266c609719bSwdenksuch information is kept in a configuration file 267c609719bSwdenk"include/configs/<board_name>.h". 268c609719bSwdenk 269c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 270c609719bSwdenk"include/configs/TQM823L.h". 271c609719bSwdenk 272c609719bSwdenk 2737f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2747f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2757f6c2cbcSwdenkbuild a config tool - later. 2767f6c2cbcSwdenk 2777f6c2cbcSwdenk 278c609719bSwdenkThe following options need to be configured: 279c609719bSwdenk 2802628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 281c609719bSwdenk 2822628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2836ccec449SWolfgang Denk 2846ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 28509ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 286c609719bSwdenk 287c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 288c609719bSwdenk Define exactly one of 289c609719bSwdenk CONFIG_CMA286_60_OLD 290c609719bSwdenk--- FIXME --- not tested yet: 291c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 292c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 293c609719bSwdenk 294c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 295c609719bSwdenk Define exactly one of 296c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 297c609719bSwdenk 298c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 299c609719bSwdenk Define one or more of 300c609719bSwdenk CONFIG_CMA302 301c609719bSwdenk 302c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 303c609719bSwdenk Define one or more of 304c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 30511ccc33fSMarcel Ziswiler the LCD display every second with 306c609719bSwdenk a "rotator" |\-/|\-/ 307c609719bSwdenk 3082535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3092535d602Swdenk CONFIG_ADSTYPE 3102535d602Swdenk Possible values are: 3116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3152535d602Swdenk 316cf946c6dSLei Wen- Marvell Family Member 317cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 318cf946c6dSLei Wen multiple fs option at one time 319cf946c6dSLei Wen for marvell soc family 320cf946c6dSLei Wen 321c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 322c609719bSwdenk Define exactly one of 323c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 324c609719bSwdenk 32511ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 32666ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 32766ca92a5Swdenk get_gclk_freq() cannot work 3285da627a4Swdenk e.g. if there is no 32KHz 3295da627a4Swdenk reference PIT/RTC clock 33066ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 33166ca92a5Swdenk or XTAL/EXTAL) 332c609719bSwdenk 33366ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 33666ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 33775d1ea7fSwdenk See doc/README.MPC866 33875d1ea7fSwdenk 3396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 34075d1ea7fSwdenk 34175d1ea7fSwdenk Define this to measure the actual CPU clock instead 34275d1ea7fSwdenk of relying on the correctness of the configured 34375d1ea7fSwdenk values. Mostly useful for board bringup to make sure 34475d1ea7fSwdenk the PLL is locked at the intended frequency. Note 34575d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 34775d1ea7fSwdenk 348506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 349506f3918SHeiko Schocher 350506f3918SHeiko Schocher Define this option if you want to enable the 351506f3918SHeiko Schocher ICache only when Code runs from RAM. 352506f3918SHeiko Schocher 35366412c63SKumar Gala- 85xx CPU Options: 354ffd06e02SYork Sun CONFIG_SYS_PPC64 355ffd06e02SYork Sun 356ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 357ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 358ffd06e02SYork Sun compliance, among other possible reasons. 359ffd06e02SYork Sun 36066412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36166412c63SKumar Gala 36266412c63SKumar Gala Defines the core time base clock divider ratio compared to the 36366412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 36466412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 36566412c63SKumar Gala 3668f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3678f29084aSKumar Gala 3688f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3698f29084aSKumar Gala tree nodes for the given platform. 3708f29084aSKumar Gala 371afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 372afa6b551SPrabhakar Kushwaha 373afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 374afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 375afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 376afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 377afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 378afa6b551SPrabhakar Kushwaha purpose. 379afa6b551SPrabhakar Kushwaha 38033eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 38133eee330SScott Wood 38233eee330SScott Wood Enables a workaround for erratum A004510. If set, 38333eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 38433eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 38533eee330SScott Wood 38633eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 38733eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 38833eee330SScott Wood 38933eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 39033eee330SScott Wood for which the A004510 workaround should be applied. 39133eee330SScott Wood 39233eee330SScott Wood The rest of SVR is either not relevant to the decision 39333eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 39433eee330SScott Wood p2041) or is implied by the build target, which controls 39533eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 39633eee330SScott Wood 39733eee330SScott Wood See Freescale App Note 4493 for more information about 39833eee330SScott Wood this erratum. 39933eee330SScott Wood 40074fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 40174fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 40274fa22edSPrabhakar Kushwaha requred during NOR boot. 40374fa22edSPrabhakar Kushwaha 40433eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 40533eee330SScott Wood 40633eee330SScott Wood This is the value to write into CCSR offset 0x18600 40733eee330SScott Wood according to the A004510 workaround. 40833eee330SScott Wood 40964501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 41064501c66SPriyanka Jain This value denotes start offset of DDR memory which is 41164501c66SPriyanka Jain connected exclusively to the DSP cores. 41264501c66SPriyanka Jain 413765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 414765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 415765b0bdbSPriyanka Jain which is directly connected to the DSP core. 416765b0bdbSPriyanka Jain 41764501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 41864501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 41964501c66SPriyanka Jain connected to the DSP core. 42064501c66SPriyanka Jain 421765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 422765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 423765b0bdbSPriyanka Jain 424cb93071bSYork Sun CONFIG_SYS_FSL_DDR_EMU 425cb93071bSYork Sun Specify emulator support for DDR. Some DDR features such as 426cb93071bSYork Sun deskew training are not available. 427cb93071bSYork Sun 4286cb461b4SDaniel Schwierzeck- Generic CPU options: 4296cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4306cb461b4SDaniel Schwierzeck 4316cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4326cb461b4SDaniel Schwierzeck values is arch specific. 4336cb461b4SDaniel Schwierzeck 4340b953ffcSMarkus Klotzbuecher- Intel Monahans options: 4356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 4360b953ffcSMarkus Klotzbuecher 4370b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 4380b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 4390b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 4400b953ffcSMarkus Klotzbuecher 4416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 4420b953ffcSMarkus Klotzbuecher 4430b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 4440b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 4450b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 4460b953ffcSMarkus Klotzbuecher by this value. 4470b953ffcSMarkus Klotzbuecher 44892bbd64eSDaniel Schwierzeck- MIPS CPU options: 44992bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 45092bbd64eSDaniel Schwierzeck 45192bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 45292bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 45392bbd64eSDaniel Schwierzeck relocation. 45492bbd64eSDaniel Schwierzeck 45592bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 45692bbd64eSDaniel Schwierzeck 45792bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 45892bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 45992bbd64eSDaniel Schwierzeck Possible values are: 46092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 46192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 46292bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 46392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 46492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 46592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 46692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 46792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 46892bbd64eSDaniel Schwierzeck 46992bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 47092bbd64eSDaniel Schwierzeck 47192bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 47292bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 47392bbd64eSDaniel Schwierzeck 47492bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 47592bbd64eSDaniel Schwierzeck 47692bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 47792bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 47892bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 47992bbd64eSDaniel Schwierzeck 480b67d8816SChristian Riesch- ARM options: 481b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 482b67d8816SChristian Riesch 483b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 484b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 485b67d8816SChristian Riesch 4865356f545SAneesh V CONFIG_SYS_THUMB_BUILD 4875356f545SAneesh V 4885356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 4895356f545SAneesh V set for ARM architectures. Thumb instruction set provides 4905356f545SAneesh V better code density. For ARM architectures that support 4915356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 4925356f545SAneesh V GCC. 4935356f545SAneesh V 494c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 4950678587fSStephen Warren CONFIG_ARM_ERRATA_742230 4960678587fSStephen Warren CONFIG_ARM_ERRATA_743622 4970678587fSStephen Warren CONFIG_ARM_ERRATA_751472 4980678587fSStephen Warren 4990678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 5000678587fSStephen Warren during U-Boot startup. Note that these options force the 5010678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 5020678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 5030678587fSStephen Warren set these options unless they apply! 5040678587fSStephen Warren 505795659dcSStephen Warren- CPU timer options: 506795659dcSStephen Warren CONFIG_SYS_HZ 507795659dcSStephen Warren 508795659dcSStephen Warren The frequency of the timer returned by get_timer(). 509795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 510795659dcSStephen Warren option must be set to 1000. 511795659dcSStephen Warren 5125da627a4Swdenk- Linux Kernel Interface: 513c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 514c609719bSwdenk 515c609719bSwdenk U-Boot stores all clock information in Hz 516c609719bSwdenk internally. For binary compatibility with older Linux 517c609719bSwdenk kernels (which expect the clocks passed in the 518c609719bSwdenk bd_info data to be in MHz) the environment variable 519c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 520c609719bSwdenk converts clock data to MHZ before passing it to the 521c609719bSwdenk Linux kernel. 522c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 523c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 524c609719bSwdenk default environment. 525c609719bSwdenk 5265da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 5275da627a4Swdenk 52811ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 5295da627a4Swdenk expect it to be in bytes, others in MB. 5305da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 5315da627a4Swdenk 532fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 533f57f70aaSWolfgang Denk 534f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 535213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 536213bf8c8SGerald Van Baren concepts). 537213bf8c8SGerald Van Baren 538213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 539213bf8c8SGerald Van Baren * New libfdt-based support 540213bf8c8SGerald Van Baren * Adds the "fdt" command 5413bb342fcSKim Phillips * The bootm command automatically updates the fdt 542213bf8c8SGerald Van Baren 543b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 544b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 545b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 546b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 547f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 548c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 549f57f70aaSWolfgang Denk 55011ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 55111ccc33fSMarcel Ziswiler addresses 5523bb342fcSKim Phillips 5534e253137SKumar Gala CONFIG_OF_BOARD_SETUP 5544e253137SKumar Gala 5554e253137SKumar Gala Board code has addition modification that it wants to make 5564e253137SKumar Gala to the flat device tree before handing it off to the kernel 5576705d81eSwdenk 5580267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 5590267768eSMatthew McClintock 56011ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 5610267768eSMatthew McClintock param header, the default value is zero if undefined. 5620267768eSMatthew McClintock 5633887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 5643887c3fbSHeiko Schocher 5653887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 5663887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 5673887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 5683887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 5693887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 5703887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 5713887c3fbSHeiko Schocher 5727eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 5737eb29398SIgor Grinberg 5747eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 5757eb29398SIgor Grinberg machine type and must be used to specify the machine type 5767eb29398SIgor Grinberg number as it appears in the ARM machine registry 5777eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 5787eb29398SIgor Grinberg Only boards that have multiple machine types supported 5797eb29398SIgor Grinberg in a single configuration file and the machine type is 5807eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 5817eb29398SIgor Grinberg 5820b2f4ecaSNiklaus Giger- vxWorks boot parameters: 5830b2f4ecaSNiklaus Giger 5840b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 5850b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 5860b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 5870b2f4ecaSNiklaus Giger 5880b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5890b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5900b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5910b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5920b2f4ecaSNiklaus Giger 5930b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5940b2f4ecaSNiklaus Giger 5950b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5960b2f4ecaSNiklaus Giger 5970b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5980b2f4ecaSNiklaus Giger the defaults discussed just above. 5990b2f4ecaSNiklaus Giger 6002c451f78SAneesh V- Cache Configuration: 6012c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 6022c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 6032c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 6042c451f78SAneesh V 60593bc2193SAneesh V- Cache Configuration for ARM: 60693bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 60793bc2193SAneesh V controller 60893bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 60993bc2193SAneesh V controller register space 61093bc2193SAneesh V 6116705d81eSwdenk- Serial Ports: 61248d0192fSAndreas Engel CONFIG_PL010_SERIAL 6136705d81eSwdenk 6146705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 6156705d81eSwdenk 61648d0192fSAndreas Engel CONFIG_PL011_SERIAL 6176705d81eSwdenk 6186705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 6196705d81eSwdenk 6206705d81eSwdenk CONFIG_PL011_CLOCK 6216705d81eSwdenk 6226705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 6236705d81eSwdenk the clock speed of the UARTs. 6246705d81eSwdenk 6256705d81eSwdenk CONFIG_PL01x_PORTS 6266705d81eSwdenk 6276705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 6286705d81eSwdenk define this to a list of base addresses for each (supported) 6296705d81eSwdenk port. See e.g. include/configs/versatile.h 6306705d81eSwdenk 631910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 632910f1ae3SJohn Rigby 633910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 634910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 635910f1ae3SJohn Rigby this variable to initialize the extra register. 636910f1ae3SJohn Rigby 637910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 638910f1ae3SJohn Rigby 639910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 640910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 641910f1ae3SJohn Rigby variable to flush the UART at init time. 642910f1ae3SJohn Rigby 6436705d81eSwdenk 644c609719bSwdenk- Console Interface: 645c609719bSwdenk Depending on board, define exactly one serial port 646c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 647c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 648c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 649c609719bSwdenk 650c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 651c609719bSwdenk port routines must be defined elsewhere 652c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 653c609719bSwdenk 654c609719bSwdenk CONFIG_CFB_CONSOLE 655c609719bSwdenk Enables console device for a color framebuffer. Needs following 656c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 657c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 658c609719bSwdenk (default big endian) 659c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 660c609719bSwdenk rectangle fill 661c609719bSwdenk (cf. smiLynxEM) 662c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 663c609719bSwdenk bit-blit (cf. smiLynxEM) 664c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 665c609719bSwdenk (cols=pitch) 666c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 667c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 668c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 669c609719bSwdenk (0-5, cf. cfb_console.c) 670c609719bSwdenk VIDEO_FB_ADRS framebuffer address 671c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 672c609719bSwdenk (i.e. i8042_kbd_init()) 673c609719bSwdenk VIDEO_TSTC_FCT test char fct 674c609719bSwdenk (i.e. i8042_tstc) 675c609719bSwdenk VIDEO_GETC_FCT get char fct 676c609719bSwdenk (i.e. i8042_getc) 677c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 678c609719bSwdenk (requires blink timer 679c609719bSwdenk cf. i8042.c) 6806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 681c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 682c609719bSwdenk upper right corner 683602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 684c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 685c609719bSwdenk upper left corner 686a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 687a6c7ad2fSwdenk linux_logo.h for logo. 688a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 689c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 69011ccc33fSMarcel Ziswiler additional board info beside 691c609719bSwdenk the logo 692c609719bSwdenk 69333a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 69433a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 69533a35bbbSPali Rohár erase functions and limited graphics rendition control). 69633a35bbbSPali Rohár 697c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 698c609719bSwdenk default i/o. Serial console can be forced with 699c609719bSwdenk environment 'console=serial'. 700c609719bSwdenk 701a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 702a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 703a3ad8e26Swdenk the "silent" environment variable. See 704a3ad8e26Swdenk doc/README.silent for more information. 705a3ad8e26Swdenk 706c609719bSwdenk- Console Baudrate: 707c609719bSwdenk CONFIG_BAUDRATE - in bps 708c609719bSwdenk Select one of the baudrates listed in 7096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 7106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 711c609719bSwdenk 712c92fac91SHeiko Schocher- Console Rx buffer length 713c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 714c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 7152b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 716c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 717c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 718c92fac91SHeiko Schocher the SMC. 719c92fac91SHeiko Schocher 7209558b48aSGraeme Russ- Pre-Console Buffer: 7219558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 7229558b48aSGraeme Russ initialised etc) all console output is silently discarded. 7239558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 7249558b48aSGraeme Russ buffer any console messages prior to the console being 7259558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 7269558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 7279558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 7289558b48aSGraeme Russ bytes are output before the console is initialised, the 7299558b48aSGraeme Russ earlier bytes are discarded. 7309558b48aSGraeme Russ 7319558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 7329558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 7339558b48aSGraeme Russ 734046a37bdSSonny Rao- Safe printf() functions 735046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 736046a37bdSSonny Rao the printf() functions. These are defined in 737046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 738046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 739046a37bdSSonny Rao If this option is not given then these functions will 740046a37bdSSonny Rao silently discard their buffer size argument - this means 741046a37bdSSonny Rao you are not getting any overflow checking in this case. 742046a37bdSSonny Rao 743c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 744c609719bSwdenk Delay before automatically booting the default image; 745c609719bSwdenk set to -1 to disable autoboot. 74693d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 74793d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 748c609719bSwdenk 749c609719bSwdenk See doc/README.autoboot for these options that 750c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 751c609719bSwdenk CONFIG_BOOT_RETRY_TIME 752c609719bSwdenk CONFIG_BOOT_RETRY_MIN 753c609719bSwdenk CONFIG_AUTOBOOT_KEYED 754c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 755c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 756c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 757c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 758c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 759c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 760c609719bSwdenk CONFIG_RESET_TO_RETRY 761c609719bSwdenk 762c609719bSwdenk- Autoboot Command: 763c609719bSwdenk CONFIG_BOOTCOMMAND 764c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 765c609719bSwdenk define a command string that is automatically executed 766c609719bSwdenk when no character is read on the console interface 767c609719bSwdenk within "Boot Delay" after reset. 768c609719bSwdenk 769c609719bSwdenk CONFIG_BOOTARGS 770c609719bSwdenk This can be used to pass arguments to the bootm 771c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 772c609719bSwdenk environment value "bootargs". 773c609719bSwdenk 774c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 775c609719bSwdenk The value of these goes into the environment as 776c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 777c609719bSwdenk as a convenience, when switching between booting from 77811ccc33fSMarcel Ziswiler RAM and NFS. 779c609719bSwdenk 780c609719bSwdenk- Pre-Boot Commands: 781c609719bSwdenk CONFIG_PREBOOT 782c609719bSwdenk 783c609719bSwdenk When this option is #defined, the existence of the 784c609719bSwdenk environment variable "preboot" will be checked 785c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 786c609719bSwdenk countdown and/or running the auto-boot command resp. 787c609719bSwdenk entering interactive mode. 788c609719bSwdenk 789c609719bSwdenk This feature is especially useful when "preboot" is 790c609719bSwdenk automatically generated or modified. For an example 791c609719bSwdenk see the LWMON board specific code: here "preboot" is 792c609719bSwdenk modified when the user holds down a certain 793c609719bSwdenk combination of keys on the (special) keyboard when 794c609719bSwdenk booting the systems 795c609719bSwdenk 796c609719bSwdenk- Serial Download Echo Mode: 797c609719bSwdenk CONFIG_LOADS_ECHO 798c609719bSwdenk If defined to 1, all characters received during a 799c609719bSwdenk serial download (using the "loads" command) are 800c609719bSwdenk echoed back. This might be needed by some terminal 801c609719bSwdenk emulations (like "cu"), but may as well just take 802c609719bSwdenk time on others. This setting #define's the initial 803c609719bSwdenk value of the "loads_echo" environment variable. 804c609719bSwdenk 805602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 806c609719bSwdenk CONFIG_KGDB_BAUDRATE 807c609719bSwdenk Select one of the baudrates listed in 8086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 809c609719bSwdenk 810c609719bSwdenk- Monitor Functions: 811602ad3b3SJon Loeliger Monitor commands can be included or excluded 812602ad3b3SJon Loeliger from the build by using the #include files 813c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 814c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 815602ad3b3SJon Loeliger and augmenting with additional #define's 816602ad3b3SJon Loeliger for wanted commands. 817c609719bSwdenk 818602ad3b3SJon Loeliger The default command configuration includes all commands 819602ad3b3SJon Loeliger except those marked below with a "*". 820602ad3b3SJon Loeliger 821602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 822602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 823602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 824602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 825602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 826602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 827602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 828602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 829710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 830602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 831602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 832602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 833a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 834a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 835a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 836a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 837602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 838602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 839246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 840602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 841602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 8425e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 843fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 8440c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 84503e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 84603e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 847bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 848602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 84903e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 850602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 851602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 852602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 8534d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 85453fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 855a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 856a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 857bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 858602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 859602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 860602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 861602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 8628fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 8634d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 864602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 8650c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 866c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 867602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 868602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 869602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 870602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 8714d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 872d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 873d22c338eSJoe Hershberger (169.254.*.*) 874602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 875602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 8764d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 87702c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 87815a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 879602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 880a2681707SWolfgang Denk loop, loopw 8814d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 882602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 883602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 884602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 88568d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 886602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 887602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 8884d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 889e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 890e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 891602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 892602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 893602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 894602ad3b3SJon Loeliger host 895602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 896ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 897602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 898602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 899d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 900602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 901602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 902602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 903602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 904602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 905602ad3b3SJon Loeliger (4xx only) 906f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 9074d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 90802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 9097d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 91074de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 911602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 9127a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 9131fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 914da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 915da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 916602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 917602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 918c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 9194d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 920c609719bSwdenk 921c609719bSwdenk 922c609719bSwdenk EXAMPLE: If you want all functions except of network 923c609719bSwdenk support you can write: 924c609719bSwdenk 925602ad3b3SJon Loeliger #include "config_cmd_all.h" 926602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 927c609719bSwdenk 928213bf8c8SGerald Van Baren Other Commands: 929213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 930c609719bSwdenk 931c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 932602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 933c609719bSwdenk what you (and your U-Boot users) are doing. Data 934c609719bSwdenk cache cannot be enabled on systems like the 8xx or 935c609719bSwdenk 8260 (where accesses to the IMMR region must be 936c609719bSwdenk uncached), and it cannot be disabled on all other 937c609719bSwdenk systems where we (mis-) use the data cache to hold an 938c609719bSwdenk initial stack and some data. 939c609719bSwdenk 940c609719bSwdenk 941c609719bSwdenk XXX - this list needs to get updated! 942c609719bSwdenk 943a5ecbe62SWolfgang Denk- Regular expression support: 944a5ecbe62SWolfgang Denk CONFIG_REGEX 945a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 946a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 947a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 948a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 949a5ecbe62SWolfgang Denk 95045ba8077SSimon Glass- Device tree: 95145ba8077SSimon Glass CONFIG_OF_CONTROL 95245ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 95345ba8077SSimon Glass to configure its devices, instead of relying on statically 95445ba8077SSimon Glass compiled #defines in the board file. This option is 95545ba8077SSimon Glass experimental and only available on a few boards. The device 95645ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 95745ba8077SSimon Glass 9582c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 9592c0f79e4SSimon Glass be done using one of the two options below: 960bbb0b128SSimon Glass 961bbb0b128SSimon Glass CONFIG_OF_EMBED 962bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 963bbb0b128SSimon Glass binary in its image. This device tree file should be in the 964bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 965bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 966bbb0b128SSimon Glass the global data structure as gd->blob. 96745ba8077SSimon Glass 9682c0f79e4SSimon Glass CONFIG_OF_SEPARATE 9692c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 9702c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 9712c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 9722c0f79e4SSimon Glass 9732c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 9742c0f79e4SSimon Glass 9752c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 9762c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 9772c0f79e4SSimon Glass still use the individual files if you need something more 9782c0f79e4SSimon Glass exotic. 9792c0f79e4SSimon Glass 980c609719bSwdenk- Watchdog: 981c609719bSwdenk CONFIG_WATCHDOG 982c609719bSwdenk If this variable is defined, it enables watchdog 9836abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 9846abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 9856abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 9866abe6fb6SDetlev Zundel register. When supported for a specific SoC is 9876abe6fb6SDetlev Zundel available, then no further board specific code should 9886abe6fb6SDetlev Zundel be needed to use it. 9896abe6fb6SDetlev Zundel 9906abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 9916abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 9926abe6fb6SDetlev Zundel SoC, then define this variable and provide board 9936abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 994c609719bSwdenk 995c1551ea8Sstroese- U-Boot Version: 996c1551ea8Sstroese CONFIG_VERSION_VARIABLE 997c1551ea8Sstroese If this variable is defined, an environment variable 998c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 999c1551ea8Sstroese version as printed by the "version" command. 1000a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1001a1ea8e51SBenoît Thébaudeau next reset. 1002c1551ea8Sstroese 1003c609719bSwdenk- Real-Time Clock: 1004c609719bSwdenk 1005602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1006c609719bSwdenk has to be selected, too. Define exactly one of the 1007c609719bSwdenk following options: 1008c609719bSwdenk 1009c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1010c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 10114e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1012c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 10131cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1014c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 10157f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 10163bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 10179536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 10184c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 10196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 102071d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 102171d19f30SHeiko Schocher RV3029 RTC. 1022c609719bSwdenk 1023b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1024b37c7e5eSwdenk must also be configured. See I2C Support, below. 1025b37c7e5eSwdenk 1026e92739d3SPeter Tyser- GPIO Support: 1027e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1028e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 1029e92739d3SPeter Tyser 10305dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 10315dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 10325dec49caSChris Packham pins supported by a particular chip. 10335dec49caSChris Packham 1034e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1035e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1036e92739d3SPeter Tyser 1037c609719bSwdenk- Timestamp Support: 1038c609719bSwdenk 1039c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1040c609719bSwdenk (date and time) of an image is printed by image 1041c609719bSwdenk commands like bootm or iminfo. This option is 1042602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1043c609719bSwdenk 1044923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1045923c46f9SKarl O. Pinc Zero or more of the following: 1046923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1047923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1048923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1049923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1050923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1051923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1052923c46f9SKarl O. Pinc disk/part_efi.c 1053923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1054c609719bSwdenk 1055602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1056218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1057923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1058c609719bSwdenk 1059c609719bSwdenk- IDE Reset method: 10604d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 10614d13cbadSwdenk board configurations files but used nowhere! 1062c609719bSwdenk 10634d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 10644d13cbadSwdenk be performed by calling the function 10654d13cbadSwdenk ide_set_reset(int reset) 10664d13cbadSwdenk which has to be defined in a board specific file 1067c609719bSwdenk 1068c609719bSwdenk- ATAPI Support: 1069c609719bSwdenk CONFIG_ATAPI 1070c609719bSwdenk 1071c609719bSwdenk Set this to enable ATAPI support. 1072c609719bSwdenk 1073c40b2956Swdenk- LBA48 Support 1074c40b2956Swdenk CONFIG_LBA48 1075c40b2956Swdenk 1076c40b2956Swdenk Set this to enable support for disks larger than 137GB 10774b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1078c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1079c40b2956Swdenk support disks up to 2.1TB. 1080c40b2956Swdenk 10816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1082c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1083c40b2956Swdenk Default is 32bit. 1084c40b2956Swdenk 1085c609719bSwdenk- SCSI Support: 1086c609719bSwdenk At the moment only there is only support for the 1087c609719bSwdenk SYM53C8XX SCSI controller; define 1088c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1089c609719bSwdenk 10906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 10916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 10926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1093c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1094c609719bSwdenk devices. 10956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1096c609719bSwdenk 1097447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1098447c031bSStefan Reinauer SCSI devices found during the last scan. 1099447c031bSStefan Reinauer 1100c609719bSwdenk- NETWORK Support (PCI): 1101682011ffSwdenk CONFIG_E1000 1102ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1103ce5207e1SKyle Moffett 1104ce5207e1SKyle Moffett CONFIG_E1000_SPI 1105ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1106ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1107ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1108ce5207e1SKyle Moffett 1109ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1110ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1111ce5207e1SKyle Moffett example with the "sspi" command. 1112ce5207e1SKyle Moffett 1113ce5207e1SKyle Moffett CONFIG_CMD_E1000 1114ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1115ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1116682011ffSwdenk 1117ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 111811ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1119ac3315c2SAndre Schwarz 1120c609719bSwdenk CONFIG_EEPRO100 1121c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 112211ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1123c609719bSwdenk write routine for first time initialisation. 1124c609719bSwdenk 1125c609719bSwdenk CONFIG_TULIP 1126c609719bSwdenk Support for Digital 2114x chips. 1127c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1128c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1129c609719bSwdenk 1130c609719bSwdenk CONFIG_NATSEMI 1131c609719bSwdenk Support for National dp83815 chips. 1132c609719bSwdenk 1133c609719bSwdenk CONFIG_NS8382X 1134c609719bSwdenk Support for National dp8382[01] gigabit chips. 1135c609719bSwdenk 113645219c46Swdenk- NETWORK Support (other): 113745219c46Swdenk 1138c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1139c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1140c041e9d2SJens Scharsig 1141c041e9d2SJens Scharsig CONFIG_RMII 1142c041e9d2SJens Scharsig Define this to use reduced MII inteface 1143c041e9d2SJens Scharsig 1144c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1145c041e9d2SJens Scharsig If this defined, the driver is quiet. 1146c041e9d2SJens Scharsig The driver doen't show link status messages. 1147c041e9d2SJens Scharsig 1148efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1149efdd7319SRob Herring Support for the Calxeda XGMAC device 1150efdd7319SRob Herring 11513bb46d23SAshok CONFIG_LAN91C96 115245219c46Swdenk Support for SMSC's LAN91C96 chips. 115345219c46Swdenk 115445219c46Swdenk CONFIG_LAN91C96_BASE 115545219c46Swdenk Define this to hold the physical address 115645219c46Swdenk of the LAN91C96's I/O space 115745219c46Swdenk 115845219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 115945219c46Swdenk Define this to enable 32 bit addressing 116045219c46Swdenk 11613bb46d23SAshok CONFIG_SMC91111 1162f39748aeSwdenk Support for SMSC's LAN91C111 chip 1163f39748aeSwdenk 1164f39748aeSwdenk CONFIG_SMC91111_BASE 1165f39748aeSwdenk Define this to hold the physical address 1166f39748aeSwdenk of the device (I/O space) 1167f39748aeSwdenk 1168f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1169f39748aeSwdenk Define this if data bus is 32 bits 1170f39748aeSwdenk 1171f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1172f39748aeSwdenk Define this to use i/o functions instead of macros 1173f39748aeSwdenk (some hardware wont work with macros) 1174f39748aeSwdenk 1175dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1176dc02badaSHeiko Schocher Support for davinci emac 1177dc02badaSHeiko Schocher 1178dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1179dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1180dc02badaSHeiko Schocher 1181b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1182b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1183b3dbf4a5SMacpaul Lin 1184b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1185b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1186b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1187b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1188b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1189b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1190b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1191b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1192b3dbf4a5SMacpaul Lin 1193c2fff331SMike Rapoport CONFIG_SMC911X 1194557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1195557b377dSJens Gehrlein 1196c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1197557b377dSJens Gehrlein Define this to hold the physical address 1198557b377dSJens Gehrlein of the device (I/O space) 1199557b377dSJens Gehrlein 1200c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1201557b377dSJens Gehrlein Define this if data bus is 32 bits 1202557b377dSJens Gehrlein 1203c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1204557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1205557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1206c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1207557b377dSJens Gehrlein 12083d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 12093d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 12103d0075faSYoshihiro Shimoda 12113d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 12123d0075faSYoshihiro Shimoda Define the number of ports to be used 12133d0075faSYoshihiro Shimoda 12143d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 12153d0075faSYoshihiro Shimoda Define the ETH PHY's address 12163d0075faSYoshihiro Shimoda 121768260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 121868260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 121968260aabSYoshihiro Shimoda 12205e124724SVadim Bendebury- TPM Support: 122190899cc0SChe-liang Chiou CONFIG_TPM 122290899cc0SChe-liang Chiou Support TPM devices. 122390899cc0SChe-liang Chiou 12241b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 12251b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 12261b393db5STom Wai-Hong Tam per system is supported at this time. 12271b393db5STom Wai-Hong Tam 12281b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 12291b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 12301b393db5STom Wai-Hong Tam 12311b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 12321b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 12331b393db5STom Wai-Hong Tam 12341b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 12351b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 12361b393db5STom Wai-Hong Tam 1237c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1238c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1239c01939c7SDirk Eibach 124090899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 12415e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 12425e124724SVadim Bendebury per system is supported at this time. 12435e124724SVadim Bendebury 12445e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 12455e124724SVadim Bendebury Base address where the generic TPM device is mapped 12465e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 12475e124724SVadim Bendebury 0xfed40000. 12485e124724SVadim Bendebury 1249be6c1529SReinhard Pfau CONFIG_CMD_TPM 1250be6c1529SReinhard Pfau Add tpm monitor functions. 1251be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1252be6c1529SReinhard Pfau provides monitor access to authorized functions. 1253be6c1529SReinhard Pfau 1254be6c1529SReinhard Pfau CONFIG_TPM 1255be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1256be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1257be6c1529SReinhard Pfau Requires support for a TPM device. 1258be6c1529SReinhard Pfau 1259be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1260be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1261be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1262be6c1529SReinhard Pfau 1263c609719bSwdenk- USB Support: 1264c609719bSwdenk At the moment only the UHCI host controller is 12654d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1266c609719bSwdenk CONFIG_USB_UHCI to enable it. 1267c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 126830d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1269c609719bSwdenk storage devices. 1270c609719bSwdenk Note: 1271c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1272c609719bSwdenk (TEAC FD-05PUB). 12734d13cbadSwdenk MPC5200 USB requires additional defines: 12744d13cbadSwdenk CONFIG_USB_CLOCK 12754d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1276307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1277307ecb6dSEric Millbrandt for USB on PSC3 12784d13cbadSwdenk CONFIG_USB_CONFIG 12794d13cbadSwdenk for differential drivers: 0x00001000 12804d13cbadSwdenk for single ended drivers: 0x00005000 1281307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1282307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 12836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1284fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1285fdcfaa1bSZhang Wei instead of using asynchronous interrupts 12864d13cbadSwdenk 12879ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 12889ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 12899ab4ce22SSimon Glass 1290aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1291aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1292aa155058SKuo-Jung Su 129316c8d5e7SWolfgang Denk- USB Device: 129416c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 129516c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 129616c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 129711ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 129816c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 129916c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 130016c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 130116c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 130216c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 130316c8d5e7SWolfgang Denk a Linux host by 130416c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 130516c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 130616c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 130716c8d5e7SWolfgang Denk might be defined in YourBoardName.h 130816c8d5e7SWolfgang Denk 130916c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 131016c8d5e7SWolfgang Denk Define this to build a UDC device 131116c8d5e7SWolfgang Denk 131216c8d5e7SWolfgang Denk CONFIG_USB_TTY 131316c8d5e7SWolfgang Denk Define this to have a tty type of device available to 131416c8d5e7SWolfgang Denk talk to the UDC device 131516c8d5e7SWolfgang Denk 1316f9da0f89SVipin KUMAR CONFIG_USBD_HS 1317f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1318f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1319f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1320f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1321f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1322f9da0f89SVipin KUMAR speed. 1323f9da0f89SVipin KUMAR 13246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 132516c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 132616c8d5e7SWolfgang Denk be set to usbtty. 132716c8d5e7SWolfgang Denk 132816c8d5e7SWolfgang Denk mpc8xx: 13296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 133016c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 13316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 133216c8d5e7SWolfgang Denk 13336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 133416c8d5e7SWolfgang Denk Derive USB clock from brgclk 13356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 133616c8d5e7SWolfgang Denk 133716c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 133816c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 133916c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 134016c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 134116c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 134216c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 134316c8d5e7SWolfgang Denk 134416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 134516c8d5e7SWolfgang Denk Define this string as the name of your company for 134616c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 134716c8d5e7SWolfgang Denk 134816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 134916c8d5e7SWolfgang Denk Define this string as the name of your product 135016c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 135116c8d5e7SWolfgang Denk 135216c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 135316c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 135416c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 135516c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 135616c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 135716c8d5e7SWolfgang Denk 135816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 135916c8d5e7SWolfgang Denk Define this as the unique Product ID 136016c8d5e7SWolfgang Denk for your device 136116c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1362c609719bSwdenk 1363d70a560fSIgor Grinberg- ULPI Layer Support: 1364d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1365d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1366d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1367d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1368d70a560fSIgor Grinberg viewport is supported. 1369d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1370d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 13716d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 13726d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 13736d365ea0SLucas Stach the appropriate value in Hz. 1374c609719bSwdenk 1375c609719bSwdenk- MMC Support: 1376c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1377c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1378c609719bSwdenk accessed from the boot prompt by mapping the device 1379c609719bSwdenk to physical memory similar to flash. Command line is 1380602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1381602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1382c609719bSwdenk 1383afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1384afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1385afb35666SYoshihiro Shimoda 1386afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1387afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1388afb35666SYoshihiro Shimoda 1389afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1390afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1391afb35666SYoshihiro Shimoda 1392b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1393b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1394b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1395b3ba6e94STom Rini 1396b3ba6e94STom Rini CONFIG_CMD_DFU 1397b3ba6e94STom Rini This enables the command "dfu" which is used to have 1398b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1399b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1400b3ba6e94STom Rini set and define the alt settings to expose to the host. 1401b3ba6e94STom Rini 1402b3ba6e94STom Rini CONFIG_DFU_MMC 1403b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1404b3ba6e94STom Rini 1405c6631764SPantelis Antoniou CONFIG_DFU_NAND 1406c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1407c6631764SPantelis Antoniou 1408e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1409e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1410e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1411e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1412e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1413e7e75c70SHeiko Schocher 1414ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1415ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1416ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1417ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1418ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1419ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1420ea2453d5SPantelis Antoniou 14216705d81eSwdenk- Journaling Flash filesystem support: 14226705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 14236705d81eSwdenk CONFIG_JFFS2_NAND_DEV 14246705d81eSwdenk Define these for a default partition on a NAND device 14256705d81eSwdenk 14266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 14276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 14286705d81eSwdenk Define these for a default partition on a NOR device 14296705d81eSwdenk 14306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 14316705d81eSwdenk Define this to create an own partition. You have to provide a 14326705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 14336705d81eSwdenk 14346705d81eSwdenk If you define only one JFFS2 partition you may also want to 14356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 14366705d81eSwdenk to disable the command chpart. This is the default when you 14376705d81eSwdenk have not defined a custom partition 14386705d81eSwdenk 1439c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1440c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1441656f4c65SDonggeun Kim 1442656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1443656f4c65SDonggeun Kim file in FAT formatted partition. 1444656f4c65SDonggeun Kim 1445656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1446656f4c65SDonggeun Kim user to write files to FAT. 1447c30a15e5SDonggeun Kim 144884cd9327SGabe BlackCBFS (Coreboot Filesystem) support 144984cd9327SGabe Black CONFIG_CMD_CBFS 145084cd9327SGabe Black 145184cd9327SGabe Black Define this to enable support for reading from a Coreboot 145284cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 145384cd9327SGabe Black and cbfsload. 145484cd9327SGabe Black 1455c609719bSwdenk- Keyboard Support: 1456c609719bSwdenk CONFIG_ISA_KEYBOARD 1457c609719bSwdenk 1458c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1459c609719bSwdenk support 1460c609719bSwdenk 1461c609719bSwdenk CONFIG_I8042_KBD 1462c609719bSwdenk Standard PC keyboard driver with US (is default) and 1463c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1464c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1465c609719bSwdenk for cfb_console. Supports cursor blinking. 1466c609719bSwdenk 1467713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1468713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1469713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1470713cb680SHung-ying Tyan which provides key scans on request. 1471713cb680SHung-ying Tyan 1472c609719bSwdenk- Video support: 1473c609719bSwdenk CONFIG_VIDEO 1474c609719bSwdenk 1475c609719bSwdenk Define this to enable video support (for output to 1476c609719bSwdenk video). 1477c609719bSwdenk 1478c609719bSwdenk CONFIG_VIDEO_CT69000 1479c609719bSwdenk 1480c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1481c609719bSwdenk 1482c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1483eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1484eeb1b77bSwdenk video output is selected via environment 'videoout' 1485eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1486eeb1b77bSwdenk assumed. 1487c609719bSwdenk 1488eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 148911ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1490eeb1b77bSwdenk are possible: 1491eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1492eeb1b77bSwdenk Following standard modes are supported (* is default): 1493eeb1b77bSwdenk 1494eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1495eeb1b77bSwdenk -------------+--------------------------------------------- 1496eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1497eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1498eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1499eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1500eeb1b77bSwdenk -------------+--------------------------------------------- 1501c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1502c609719bSwdenk 1503eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 15047817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1505eeb1b77bSwdenk 1506eeb1b77bSwdenk 1507a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1508a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1509a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1510a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1511a6c7ad2fSwdenk 15127d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 15137d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 15147d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 15157d3053fbSTimur Tabi support, and should also define these other macros: 15167d3053fbSTimur Tabi 15177d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 15187d3053fbSTimur Tabi CONFIG_VIDEO 15197d3053fbSTimur Tabi CONFIG_CMD_BMP 15207d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 15217d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 15227d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 15237d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 15247d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 15257d3053fbSTimur Tabi 1526ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1527ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1528ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1529ba8e76bdSTimur Tabi description of this variable. 15307d3053fbSTimur Tabi 1531058d59b0SSimon Glass CONFIG_VIDEO_VGA 1532058d59b0SSimon Glass 1533058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1534058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1535058d59b0SSimon Glass driver. 1536058d59b0SSimon Glass 1537058d59b0SSimon Glass 1538682011ffSwdenk- Keyboard Support: 1539682011ffSwdenk CONFIG_KEYBOARD 1540682011ffSwdenk 1541682011ffSwdenk Define this to enable a custom keyboard support. 1542682011ffSwdenk This simply calls drv_keyboard_init() which must be 1543682011ffSwdenk defined in your board-specific files. 1544682011ffSwdenk The only board using this so far is RBC823. 1545a6c7ad2fSwdenk 1546c609719bSwdenk- LCD Support: CONFIG_LCD 1547c609719bSwdenk 1548c609719bSwdenk Define this to enable LCD support (for output to LCD 1549c609719bSwdenk display); also select one of the supported displays 1550c609719bSwdenk by defining one of these: 1551c609719bSwdenk 155239cf4804SStelian Pop CONFIG_ATMEL_LCD: 155339cf4804SStelian Pop 155439cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 155539cf4804SStelian Pop 1556fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1557c609719bSwdenk 1558fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1559c609719bSwdenk 1560fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1561c609719bSwdenk 1562fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1563fd3103bbSwdenk Active, color, single scan. 1564fd3103bbSwdenk 1565fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1566fd3103bbSwdenk 1567fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1568c609719bSwdenk Active, color, single scan. 1569c609719bSwdenk 1570c609719bSwdenk CONFIG_SHARP_16x9 1571c609719bSwdenk 1572c609719bSwdenk Sharp 320x240. Active, color, single scan. 1573c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1574c609719bSwdenk 1575c609719bSwdenk CONFIG_SHARP_LQ64D341 1576c609719bSwdenk 1577c609719bSwdenk Sharp LQ64D341 display, 640x480. 1578c609719bSwdenk Active, color, single scan. 1579c609719bSwdenk 1580c609719bSwdenk CONFIG_HLD1045 1581c609719bSwdenk 1582c609719bSwdenk HLD1045 display, 640x480. 1583c609719bSwdenk Active, color, single scan. 1584c609719bSwdenk 1585c609719bSwdenk CONFIG_OPTREX_BW 1586c609719bSwdenk 1587c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1588c609719bSwdenk or 1589c609719bSwdenk Hitachi LMG6912RPFC-00T 1590c609719bSwdenk or 1591c609719bSwdenk Hitachi SP14Q002 1592c609719bSwdenk 1593c609719bSwdenk 320x240. Black & white. 1594c609719bSwdenk 1595c609719bSwdenk Normally display is black on white background; define 15966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1597c609719bSwdenk 1598676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1599676d319eSSimon Glass 1600676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1601676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1602676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1603676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1604676d319eSSimon Glass a per-section basis. 1605676d319eSSimon Glass 16060d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 16070d89efefSSimon Glass 16080d89efefSSimon Glass When the console need to be scrolled, this is the number of 16090d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 16100d89efefSSimon Glass the console jump but can help speed up operation when scrolling 16110d89efefSSimon Glass is slow. 1612676d319eSSimon Glass 161345d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 161445d7f525STom Wai-Hong Tam 161545d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 161645d7f525STom Wai-Hong Tam 1617735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1618735987c5STom Wai-Hong Tam 1619735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1620735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1621735987c5STom Wai-Hong Tam 16227152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1623d791b1dcSwdenk 1624d791b1dcSwdenk If this option is set, the environment is checked for 1625d791b1dcSwdenk a variable "splashimage". If found, the usual display 1626d791b1dcSwdenk of logo, copyright and system information on the LCD 1627e94d2cd9Swdenk is suppressed and the BMP image at the address 1628d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1629d791b1dcSwdenk console is redirected to the "nulldev", too. This 1630d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1631d791b1dcSwdenk loaded very quickly after power-on. 1632d791b1dcSwdenk 1633c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1634c0880485SNikita Kiryanov 1635c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1636c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 1637c0880485SNikita Kiryanov (see README.displaying-bmps and README.arm-unaligned-accesses). 1638c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1639c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1640c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1641c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1642c0880485SNikita Kiryanov there is no need to set this option. 1643c0880485SNikita Kiryanov 16441ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 16451ca298ceSMatthias Weisser 16461ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 16471ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 16481ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 16491ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 16501ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 16511ca298ceSMatthias Weisser specify 'm' for centering the image. 16521ca298ceSMatthias Weisser 16531ca298ceSMatthias Weisser Example: 16541ca298ceSMatthias Weisser setenv splashpos m,m 16551ca298ceSMatthias Weisser => image at center of screen 16561ca298ceSMatthias Weisser 16571ca298ceSMatthias Weisser setenv splashpos 30,20 16581ca298ceSMatthias Weisser => image at x = 30 and y = 20 16591ca298ceSMatthias Weisser 16601ca298ceSMatthias Weisser setenv splashpos -10,m 16611ca298ceSMatthias Weisser => vertically centered image 16621ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 16631ca298ceSMatthias Weisser 166498f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 166598f4a3dfSStefan Roese 166698f4a3dfSStefan Roese If this option is set, additionally to standard BMP 166798f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 166898f4a3dfSStefan Roese splashscreen support or the bmp command. 166998f4a3dfSStefan Roese 1670d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1671d5011762SAnatolij Gustschin 1672d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1673d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1674d5011762SAnatolij Gustschin bmp command. 1675d5011762SAnatolij Gustschin 1676f2b96dfbSLei Wen- Do compresssing for memory range: 1677f2b96dfbSLei Wen CONFIG_CMD_ZIP 1678f2b96dfbSLei Wen 1679f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1680f2b96dfbSLei Wen to compress the specified memory at its best effort. 1681f2b96dfbSLei Wen 1682c29fdfc1Swdenk- Compression support: 1683c29fdfc1Swdenk CONFIG_BZIP2 1684c29fdfc1Swdenk 1685c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1686c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1687c29fdfc1Swdenk compressed images are supported. 1688c29fdfc1Swdenk 1689c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 16906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1691c29fdfc1Swdenk be at least 4MB. 1692d791b1dcSwdenk 1693fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1694fc9c1727SLuigi 'Comio' Mantellini 1695fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1696fc9c1727SLuigi 'Comio' Mantellini images is included. 1697fc9c1727SLuigi 'Comio' Mantellini 1698fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1699fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1700fc9c1727SLuigi 'Comio' Mantellini formula: 1701fc9c1727SLuigi 'Comio' Mantellini 1702fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1703fc9c1727SLuigi 'Comio' Mantellini 1704fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1705fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1706fc9c1727SLuigi 'Comio' Mantellini 1707fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1708fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1709fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1710fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1711fc9c1727SLuigi 'Comio' Mantellini 1712fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1713fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 17146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1715fc9c1727SLuigi 'Comio' Mantellini 171617ea1177Swdenk- MII/PHY support: 171717ea1177Swdenk CONFIG_PHY_ADDR 171817ea1177Swdenk 171917ea1177Swdenk The address of PHY on MII bus. 172017ea1177Swdenk 172117ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 172217ea1177Swdenk 172317ea1177Swdenk The clock frequency of the MII bus 172417ea1177Swdenk 172517ea1177Swdenk CONFIG_PHY_GIGE 172617ea1177Swdenk 172717ea1177Swdenk If this option is set, support for speed/duplex 172811ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 172917ea1177Swdenk 173017ea1177Swdenk CONFIG_PHY_RESET_DELAY 173117ea1177Swdenk 173217ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 173317ea1177Swdenk reset before any MII register access is possible. 173417ea1177Swdenk For such PHY, set this option to the usec delay 173517ea1177Swdenk required. (minimum 300usec for LXT971A) 173617ea1177Swdenk 173717ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 173817ea1177Swdenk 173917ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 174017ea1177Swdenk command issued before MII status register can be read 174117ea1177Swdenk 1742c609719bSwdenk- Ethernet address: 1743c609719bSwdenk CONFIG_ETHADDR 1744c68a05feSrichardretanubun CONFIG_ETH1ADDR 1745c609719bSwdenk CONFIG_ETH2ADDR 1746c609719bSwdenk CONFIG_ETH3ADDR 1747c68a05feSrichardretanubun CONFIG_ETH4ADDR 1748c68a05feSrichardretanubun CONFIG_ETH5ADDR 1749c609719bSwdenk 175011ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 175111ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1752c609719bSwdenk is not determined automatically. 1753c609719bSwdenk 1754c609719bSwdenk- IP address: 1755c609719bSwdenk CONFIG_IPADDR 1756c609719bSwdenk 1757c609719bSwdenk Define a default value for the IP address to use for 175811ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1759c609719bSwdenk determined through e.g. bootp. 17601ebcd654SWolfgang Denk (Environment variable "ipaddr") 1761c609719bSwdenk 1762c609719bSwdenk- Server IP address: 1763c609719bSwdenk CONFIG_SERVERIP 1764c609719bSwdenk 1765c609719bSwdenk Defines a default value for the IP address of a TFTP 1766c609719bSwdenk server to contact when using the "tftboot" command. 17671ebcd654SWolfgang Denk (Environment variable "serverip") 1768c609719bSwdenk 176997cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 177097cfe861SRobin Getz 177197cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 177297cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 177397cfe861SRobin Getz 17741ebcd654SWolfgang Denk- Gateway IP address: 17751ebcd654SWolfgang Denk CONFIG_GATEWAYIP 17761ebcd654SWolfgang Denk 17771ebcd654SWolfgang Denk Defines a default value for the IP address of the 17781ebcd654SWolfgang Denk default router where packets to other networks are 17791ebcd654SWolfgang Denk sent to. 17801ebcd654SWolfgang Denk (Environment variable "gatewayip") 17811ebcd654SWolfgang Denk 17821ebcd654SWolfgang Denk- Subnet mask: 17831ebcd654SWolfgang Denk CONFIG_NETMASK 17841ebcd654SWolfgang Denk 17851ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 17861ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 17871ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 17881ebcd654SWolfgang Denk forwarded through a router. 17891ebcd654SWolfgang Denk (Environment variable "netmask") 17901ebcd654SWolfgang Denk 179153a5c424SDavid Updegraff- Multicast TFTP Mode: 179253a5c424SDavid Updegraff CONFIG_MCAST_TFTP 179353a5c424SDavid Updegraff 179453a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 179553a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 179611ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 179753a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 179853a5c424SDavid Updegraff multicast group. 179953a5c424SDavid Updegraff 1800c609719bSwdenk- BOOTP Recovery Mode: 1801c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1802c609719bSwdenk 1803c609719bSwdenk If you have many targets in a network that try to 1804c609719bSwdenk boot using BOOTP, you may want to avoid that all 1805c609719bSwdenk systems send out BOOTP requests at precisely the same 1806c609719bSwdenk moment (which would happen for instance at recovery 1807c609719bSwdenk from a power failure, when all systems will try to 1808c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1809c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1810c609719bSwdenk inserted before sending out BOOTP requests. The 18116c33c785SWolfgang Denk following delays are inserted then: 1812c609719bSwdenk 1813c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1814c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1815c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1816c609719bSwdenk 4th and following 1817c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1818c609719bSwdenk 1819fe389a82Sstroese- DHCP Advanced Options: 18201fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 18211fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1822fe389a82Sstroese 18231fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 18241fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 18251fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 18261fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 18271fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 18281fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 18291fe80d79SJon Loeliger CONFIG_BOOTP_DNS 18301fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 18311fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 18321fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 18331fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 18341fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 18352c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1836fe389a82Sstroese 18375d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 18385d110f0aSWilson Callan environment variable, not the BOOTP server. 1839fe389a82Sstroese 18402c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 18412c00e099SJoe Hershberger after the configured retry count, the call will fail 18422c00e099SJoe Hershberger instead of starting over. This can be used to fail over 18432c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 18442c00e099SJoe Hershberger is not available. 18452c00e099SJoe Hershberger 1846fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1847fe389a82Sstroese serverip from a DHCP server, it is possible that more 1848fe389a82Sstroese than one DNS serverip is offered to the client. 1849fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1850fe389a82Sstroese serverip will be stored in the additional environment 1851fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1852fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 18531fe80d79SJon Loeliger is defined. 1854fe389a82Sstroese 1855fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1856fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1857fe389a82Sstroese need the hostname of the DHCP requester. 18585d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 18591fe80d79SJon Loeliger of the "hostname" environment variable is passed as 18601fe80d79SJon Loeliger option 12 to the DHCP server. 1861fe389a82Sstroese 1862d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1863d9a2f416SAras Vaichas 1864d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1865d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1866d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1867d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1868d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1869d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1870d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1871d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1872d9a2f416SAras Vaichas that one of the retries will be successful but note that 1873d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1874d9a2f416SAras Vaichas this delay. 1875d9a2f416SAras Vaichas 1876d22c338eSJoe Hershberger - Link-local IP address negotiation: 1877d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1878d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1879d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1880d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1881d22c338eSJoe Hershberger 1882d22c338eSJoe Hershberger See doc/README.link-local for more information. 1883d22c338eSJoe Hershberger 1884a3d991bdSwdenk - CDP Options: 1885a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1886a3d991bdSwdenk 1887a3d991bdSwdenk The device id used in CDP trigger frames. 1888a3d991bdSwdenk 1889a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1890a3d991bdSwdenk 1891a3d991bdSwdenk A two character string which is prefixed to the MAC address 1892a3d991bdSwdenk of the device. 1893a3d991bdSwdenk 1894a3d991bdSwdenk CONFIG_CDP_PORT_ID 1895a3d991bdSwdenk 1896a3d991bdSwdenk A printf format string which contains the ascii name of 1897a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 189811ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1899a3d991bdSwdenk 1900a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1901a3d991bdSwdenk 1902a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1903a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1904a3d991bdSwdenk 1905a3d991bdSwdenk CONFIG_CDP_VERSION 1906a3d991bdSwdenk 1907a3d991bdSwdenk An ascii string containing the version of the software. 1908a3d991bdSwdenk 1909a3d991bdSwdenk CONFIG_CDP_PLATFORM 1910a3d991bdSwdenk 1911a3d991bdSwdenk An ascii string containing the name of the platform. 1912a3d991bdSwdenk 1913a3d991bdSwdenk CONFIG_CDP_TRIGGER 1914a3d991bdSwdenk 1915a3d991bdSwdenk A 32bit integer sent on the trigger. 1916a3d991bdSwdenk 1917a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1918a3d991bdSwdenk 1919a3d991bdSwdenk A 16bit integer containing the power consumption of the 1920a3d991bdSwdenk device in .1 of milliwatts. 1921a3d991bdSwdenk 1922a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1923a3d991bdSwdenk 1924a3d991bdSwdenk A byte containing the id of the VLAN. 1925a3d991bdSwdenk 1926c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1927c609719bSwdenk 1928c609719bSwdenk Several configurations allow to display the current 1929c609719bSwdenk status using a LED. For instance, the LED will blink 1930c609719bSwdenk fast while running U-Boot code, stop blinking as 1931c609719bSwdenk soon as a reply to a BOOTP request was received, and 1932c609719bSwdenk start blinking slow once the Linux kernel is running 1933c609719bSwdenk (supported by a status LED driver in the Linux 1934c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1935c609719bSwdenk feature in U-Boot. 1936c609719bSwdenk 1937c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1938c609719bSwdenk 1939c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1940c609719bSwdenk on those systems that support this (optional) 1941c609719bSwdenk feature, like the TQM8xxL modules. 1942c609719bSwdenk 19433f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 1944c609719bSwdenk 19453f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 19463f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 19473f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 19483f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 19493f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 19503f4978c7SHeiko Schocher interface. 19513f4978c7SHeiko Schocher 19523f4978c7SHeiko Schocher ported i2c driver to the new framework: 1953ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 1954ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 1955ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 1956ea818dbbSHeiko Schocher for defining speed and slave address 1957ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 1958ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 1959ea818dbbSHeiko Schocher for defining speed and slave address 1960ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 1961ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 1962ea818dbbSHeiko Schocher for defining speed and slave address 1963ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 1964ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 1965ea818dbbSHeiko Schocher for defining speed and slave address 19663f4978c7SHeiko Schocher 196700f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 196800f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 196900f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 197000f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 197100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 197200f792e0SHeiko Schocher bus. 197300f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 197400f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 197500f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 197600f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 197700f792e0SHeiko Schocher second bus. 197800f792e0SHeiko Schocher 19791f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 19801f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 19811f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 19821f2ba722SSimon Glass 100000 and the slave addr 0! 19831f2ba722SSimon Glass 1984880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 1985880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 1986880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 1987880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 1988880540deSDirk Eibach 19893f4978c7SHeiko Schocher additional defines: 19903f4978c7SHeiko Schocher 19913f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 19923f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 19933f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 19943f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 19953f4978c7SHeiko Schocher omit this define. 19963f4978c7SHeiko Schocher 19973f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 19983f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 19993f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 20003f4978c7SHeiko Schocher omit this define. 20013f4978c7SHeiko Schocher 20023f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 20033f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 20043f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 20053f4978c7SHeiko Schocher define. 20063f4978c7SHeiko Schocher 20073f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 20083f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 20093f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 20103f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 20113f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 20123f4978c7SHeiko Schocher 20133f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 20143f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 20153f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 20163f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 20173f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 20183f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 20193f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 20203f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 20213f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 20223f4978c7SHeiko Schocher } 20233f4978c7SHeiko Schocher 20243f4978c7SHeiko Schocher which defines 20253f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2026ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2027ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2028ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2029ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2030ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 20313f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2032ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2033ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 20343f4978c7SHeiko Schocher 20353f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 20363f4978c7SHeiko Schocher 2037ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 20383f4978c7SHeiko Schocher 20393f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 20403f4978c7SHeiko Schocher provides the following compelling advantages: 20413f4978c7SHeiko Schocher 20423f4978c7SHeiko Schocher - more than one i2c adapter is usable 20433f4978c7SHeiko Schocher - approved multibus support 20443f4978c7SHeiko Schocher - better i2c mux support 20453f4978c7SHeiko Schocher 20463f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 20473f4978c7SHeiko Schocher 2048ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2049ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2050ea818dbbSHeiko Schocher for the selected CPU. 2051c609719bSwdenk 2052b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2053602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2054b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2055b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2056c609719bSwdenk command line interface. 2057c609719bSwdenk 2058bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2059c609719bSwdenk 2060b37c7e5eSwdenk There are several other quantities that must also be 2061ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2062c609719bSwdenk 20636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2064b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 20656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 206611ccc33fSMarcel Ziswiler the CPU's i2c node address). 2067c609719bSwdenk 20688d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2069a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 20708d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 20718d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 20728d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2073b37c7e5eSwdenk 20745da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 20755da71efaSEric Millbrandt 20765da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 20775da71efaSEric Millbrandt chips might think that the current transfer is still 20785da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 20795da71efaSEric Millbrandt commands until the slave device responds. 20805da71efaSEric Millbrandt 2081b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2082b37c7e5eSwdenk 2083ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2084b37c7e5eSwdenk then the following macros need to be defined (examples are 2085b37c7e5eSwdenk from include/configs/lwmon.h): 2086c609719bSwdenk 2087c609719bSwdenk I2C_INIT 2088c609719bSwdenk 2089b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2090c609719bSwdenk controller or configure ports. 2091c609719bSwdenk 2092b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2093b37c7e5eSwdenk 2094c609719bSwdenk I2C_PORT 2095c609719bSwdenk 2096c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2097c609719bSwdenk assumes both bits are on the same port). Valid values 2098c609719bSwdenk are 0..3 for ports A..D. 2099c609719bSwdenk 2100c609719bSwdenk I2C_ACTIVE 2101c609719bSwdenk 2102c609719bSwdenk The code necessary to make the I2C data line active 2103c609719bSwdenk (driven). If the data line is open collector, this 2104c609719bSwdenk define can be null. 2105c609719bSwdenk 2106b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2107b37c7e5eSwdenk 2108c609719bSwdenk I2C_TRISTATE 2109c609719bSwdenk 2110c609719bSwdenk The code necessary to make the I2C data line tri-stated 2111c609719bSwdenk (inactive). If the data line is open collector, this 2112c609719bSwdenk define can be null. 2113c609719bSwdenk 2114b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2115b37c7e5eSwdenk 2116c609719bSwdenk I2C_READ 2117c609719bSwdenk 2118472d5460SYork Sun Code that returns true if the I2C data line is high, 2119472d5460SYork Sun false if it is low. 2120c609719bSwdenk 2121b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2122b37c7e5eSwdenk 2123c609719bSwdenk I2C_SDA(bit) 2124c609719bSwdenk 2125472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2126472d5460SYork Sun is false, it clears it (low). 2127c609719bSwdenk 2128b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2129b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2130b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2131b37c7e5eSwdenk 2132c609719bSwdenk I2C_SCL(bit) 2133c609719bSwdenk 2134472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2135472d5460SYork Sun is false, it clears it (low). 2136c609719bSwdenk 2137b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2138b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2139b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2140b37c7e5eSwdenk 2141c609719bSwdenk I2C_DELAY 2142c609719bSwdenk 2143c609719bSwdenk This delay is invoked four times per clock cycle so this 2144c609719bSwdenk controls the rate of data transfer. The data rate thus 2145b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2146b37c7e5eSwdenk like: 2147b37c7e5eSwdenk 2148b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2149c609719bSwdenk 2150793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2151793b5726SMike Frysinger 2152793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2153793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2154793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2155793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2156793b5726SMike Frysinger 2157793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2158793b5726SMike Frysinger the generic GPIO functions. 2159793b5726SMike Frysinger 21606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 216147cd00faSwdenk 216247cd00faSwdenk When a board is reset during an i2c bus transfer 216347cd00faSwdenk chips might think that the current transfer is still 216447cd00faSwdenk in progress. On some boards it is possible to access 216547cd00faSwdenk the i2c SCLK line directly, either by using the 216647cd00faSwdenk processor pin as a GPIO or by having a second pin 216747cd00faSwdenk connected to the bus. If this option is defined a 216847cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 216947cd00faSwdenk is run early in the boot sequence. 217047cd00faSwdenk 217126a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 217226a33504SRichard Retanubun 217326a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 217426a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 217526a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 217626a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 217726a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 217826a33504SRichard Retanubun controller provide such a method. It is called at the end of 217926a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 218026a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 218126a33504SRichard Retanubun 218217ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 218317ea1177Swdenk 218417ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 218517ea1177Swdenk in u-boot bd_info structure based on u-boot environment 218617ea1177Swdenk variable "i2cfast". (see also i2cfast) 218717ea1177Swdenk 2188bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2189bb99ad6dSBen Warren 2190bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2191bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2192bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2193bb99ad6dSBen Warren Note that bus numbering is zero-based. 2194bb99ad6dSBen Warren 21956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2196bb99ad6dSBen Warren 2197bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 21980f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 21990f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 22000f89c54bSPeter Tyser a 1D array of device addresses 2201bb99ad6dSBen Warren 2202bb99ad6dSBen Warren e.g. 2203bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 22046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2205bb99ad6dSBen Warren 2206bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2207bb99ad6dSBen Warren 2208bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 22096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2210bb99ad6dSBen Warren 2211bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2212bb99ad6dSBen Warren 22136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2214be5e6181STimur Tabi 2215be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2216be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2217be5e6181STimur Tabi 22186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 22190dc018ecSStefan Roese 22200dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 22210dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 22220dc018ecSStefan Roese 22236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 22240dc018ecSStefan Roese 22250dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 22260dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 22270dc018ecSStefan Roese 22286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 22299ebbb54fSVictor Gallardo 22309ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 22319ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 22329ebbb54fSVictor Gallardo specified DTT device. 22339ebbb54fSVictor Gallardo 22342ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 22352ac6985aSAndrew Dyer 22362ac6985aSAndrew Dyer defining this will force the i2c_read() function in 22372ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 22382ac6985aSAndrew Dyer between writing the address pointer and reading the 22392ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 22402ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 22412ac6985aSAndrew Dyer devices can use either method, but some require one or 22422ac6985aSAndrew Dyer the other. 2243be5e6181STimur Tabi 2244c609719bSwdenk- SPI Support: CONFIG_SPI 2245c609719bSwdenk 2246c609719bSwdenk Enables SPI driver (so far only tested with 2247c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2248c609719bSwdenk D/As on the SACSng board) 2249c609719bSwdenk 22506639562eSYoshihiro Shimoda CONFIG_SH_SPI 22516639562eSYoshihiro Shimoda 22526639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 22536639562eSYoshihiro Shimoda only SH7757 is supported. 22546639562eSYoshihiro Shimoda 2255c609719bSwdenk CONFIG_SPI_X 2256c609719bSwdenk 2257c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2258c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2259c609719bSwdenk 2260c609719bSwdenk CONFIG_SOFT_SPI 2261c609719bSwdenk 2262c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2263c609719bSwdenk using hardware support. This is a general purpose 2264c609719bSwdenk driver that only requires three general I/O port pins 2265c609719bSwdenk (two outputs, one input) to function. If this is 2266c609719bSwdenk defined, the board configuration must define several 2267c609719bSwdenk SPI configuration items (port pins to use, etc). For 2268c609719bSwdenk an example, see include/configs/sacsng.h. 2269c609719bSwdenk 227004a9e118SBen Warren CONFIG_HARD_SPI 227104a9e118SBen Warren 227204a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 227304a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 227404a9e118SBen Warren must define a list of chip-select function pointers. 227504a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 227604a9e118SBen Warren example, see include/configs/mpc8349emds.h. 227704a9e118SBen Warren 227838254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 227938254f45SGuennadi Liakhovetski 228038254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 22812e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 228238254f45SGuennadi Liakhovetski 22830133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 22840133502eSMatthias Fuchs 22850133502eSMatthias Fuchs Enables FPGA subsystem. 22860133502eSMatthias Fuchs 22870133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 22880133502eSMatthias Fuchs 22890133502eSMatthias Fuchs Enables support for specific chip vendors. 22900133502eSMatthias Fuchs (ALTERA, XILINX) 22910133502eSMatthias Fuchs 22920133502eSMatthias Fuchs CONFIG_FPGA_<family> 22930133502eSMatthias Fuchs 22940133502eSMatthias Fuchs Enables support for FPGA family. 22950133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 22960133502eSMatthias Fuchs 22970133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2298c609719bSwdenk 2299c609719bSwdenk Specify the number of FPGA devices to support. 2300c609719bSwdenk 23016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2302c609719bSwdenk 2303c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2304c609719bSwdenk 23056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2306c609719bSwdenk 2307c609719bSwdenk Enable checks on FPGA configuration interface busy 2308c609719bSwdenk status by the configuration function. This option 2309c609719bSwdenk will require a board or device specific function to 2310c609719bSwdenk be written. 2311c609719bSwdenk 2312c609719bSwdenk CONFIG_FPGA_DELAY 2313c609719bSwdenk 2314c609719bSwdenk If defined, a function that provides delays in the FPGA 2315c609719bSwdenk configuration driver. 2316c609719bSwdenk 23176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2318c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2319c609719bSwdenk 23206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2321c609719bSwdenk 2322c609719bSwdenk Check for configuration errors during FPGA bitfile 2323c609719bSwdenk loading. For example, abort during Virtex II 2324c609719bSwdenk configuration if the INIT_B line goes low (which 2325c609719bSwdenk indicated a CRC error). 2326c609719bSwdenk 23276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2328c609719bSwdenk 2329c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2330c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2331c609719bSwdenk FPGA configuration sequence. The default time is 500 233211ccc33fSMarcel Ziswiler ms. 2333c609719bSwdenk 23346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2335c609719bSwdenk 2336c609719bSwdenk Maximum time to wait for BUSY to deassert during 233711ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2338c609719bSwdenk 23396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2340c609719bSwdenk 2341c609719bSwdenk Time to wait after FPGA configuration. The default is 234211ccc33fSMarcel Ziswiler 200 ms. 2343c609719bSwdenk 2344c609719bSwdenk- Configuration Management: 2345c609719bSwdenk CONFIG_IDENT_STRING 2346c609719bSwdenk 2347c609719bSwdenk If defined, this string will be added to the U-Boot 2348c609719bSwdenk version information (U_BOOT_VERSION) 2349c609719bSwdenk 2350c609719bSwdenk- Vendor Parameter Protection: 2351c609719bSwdenk 2352c609719bSwdenk U-Boot considers the values of the environment 2353c609719bSwdenk variables "serial#" (Board Serial Number) and 23547152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2355c609719bSwdenk are set once by the board vendor / manufacturer, and 2356c609719bSwdenk protects these variables from casual modification by 2357c609719bSwdenk the user. Once set, these variables are read-only, 2358c609719bSwdenk and write or delete attempts are rejected. You can 235911ccc33fSMarcel Ziswiler change this behaviour: 2360c609719bSwdenk 2361c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2362c609719bSwdenk file, the write protection for vendor parameters is 236347cd00faSwdenk completely disabled. Anybody can change or delete 2364c609719bSwdenk these parameters. 2365c609719bSwdenk 2366c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2367c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 236811ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2369c609719bSwdenk which can be changed exactly ONCE by the user. [The 2370c609719bSwdenk serial# is unaffected by this, i. e. it remains 2371c609719bSwdenk read-only.] 2372c609719bSwdenk 23732598090bSJoe Hershberger The same can be accomplished in a more flexible way 23742598090bSJoe Hershberger for any variable by configuring the type of access 23752598090bSJoe Hershberger to allow for those variables in the ".flags" variable 23762598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 23772598090bSJoe Hershberger 2378c609719bSwdenk- Protected RAM: 2379c609719bSwdenk CONFIG_PRAM 2380c609719bSwdenk 2381c609719bSwdenk Define this variable to enable the reservation of 2382c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2383c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2384c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2385c609719bSwdenk this default value by defining an environment 2386c609719bSwdenk variable "pram" to the number of kB you want to 2387c609719bSwdenk reserve. Note that the board info structure will 2388c609719bSwdenk still show the full amount of RAM. If pRAM is 2389c609719bSwdenk reserved, a new environment variable "mem" will 2390c609719bSwdenk automatically be defined to hold the amount of 2391c609719bSwdenk remaining RAM in a form that can be passed as boot 2392c609719bSwdenk argument to Linux, for instance like that: 2393c609719bSwdenk 2394fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2395c609719bSwdenk saveenv 2396c609719bSwdenk 2397c609719bSwdenk This way you can tell Linux not to use this memory, 2398c609719bSwdenk either, which results in a memory region that will 2399c609719bSwdenk not be affected by reboots. 2400c609719bSwdenk 2401c609719bSwdenk *WARNING* If your board configuration uses automatic 2402c609719bSwdenk detection of the RAM size, you must make sure that 2403c609719bSwdenk this memory test is non-destructive. So far, the 2404c609719bSwdenk following board configurations are known to be 2405c609719bSwdenk "pRAM-clean": 2406c609719bSwdenk 24071b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 24081b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2409544d97e9SWolfgang Denk FLAGADM, TQM8260 2410c609719bSwdenk 241140fef049SGabe Black- Access to physical memory region (> 4GB) 241240fef049SGabe Black Some basic support is provided for operations on memory not 241340fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 241440fef049SGabe Black support access to more than 4GB of memory on 32-bit 241540fef049SGabe Black machines using physical address extension or similar. 241640fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 241740fef049SGabe Black currently only supports clearing the memory. 241840fef049SGabe Black 2419c609719bSwdenk- Error Recovery: 2420c609719bSwdenk CONFIG_PANIC_HANG 2421c609719bSwdenk 2422c609719bSwdenk Define this variable to stop the system in case of a 2423c609719bSwdenk fatal error, so that you have to reset it manually. 2424c609719bSwdenk This is probably NOT a good idea for an embedded 242511ccc33fSMarcel Ziswiler system where you want the system to reboot 2426c609719bSwdenk automatically as fast as possible, but it may be 2427c609719bSwdenk useful during development since you can try to debug 2428c609719bSwdenk the conditions that lead to the situation. 2429c609719bSwdenk 2430c609719bSwdenk CONFIG_NET_RETRY_COUNT 2431c609719bSwdenk 2432c609719bSwdenk This variable defines the number of retries for 2433c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2434c609719bSwdenk before giving up the operation. If not defined, a 2435c609719bSwdenk default value of 5 is used. 2436c609719bSwdenk 243740cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 243840cb90eeSGuennadi Liakhovetski 243940cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 244040cb90eeSGuennadi Liakhovetski 244148a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 244248a3e999STetsuyuki Kobayashi 244348a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 244448a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 244548a3e999STetsuyuki Kobayashi try longer timeout such as 244648a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 244748a3e999STetsuyuki Kobayashi 2448c609719bSwdenk- Command Interpreter: 24498078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 245004a85b3bSwdenk 245104a85b3bSwdenk Enable auto completion of commands using TAB. 245204a85b3bSwdenk 24538078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 24548078f1a5SWolfgang Denk for the "hush" shell. 24558078f1a5SWolfgang Denk 24568078f1a5SWolfgang Denk 24576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2458c609719bSwdenk 2459c609719bSwdenk Define this variable to enable the "hush" shell (from 2460c609719bSwdenk Busybox) as command line interpreter, thus enabling 2461c609719bSwdenk powerful command line syntax like 2462c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2463c609719bSwdenk constructs ("shell scripts"). 2464c609719bSwdenk 2465c609719bSwdenk If undefined, you get the old, much simpler behaviour 2466c609719bSwdenk with a somewhat smaller memory footprint. 2467c609719bSwdenk 2468c609719bSwdenk 24696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2470c609719bSwdenk 2471c609719bSwdenk This defines the secondary prompt string, which is 2472c609719bSwdenk printed when the command interpreter needs more input 2473c609719bSwdenk to complete a command. Usually "> ". 2474c609719bSwdenk 2475c609719bSwdenk Note: 2476c609719bSwdenk 2477c609719bSwdenk In the current implementation, the local variables 2478c609719bSwdenk space and global environment variables space are 2479c609719bSwdenk separated. Local variables are those you define by 24803b57fe0aSwdenk simply typing `name=value'. To access a local 2481c609719bSwdenk variable later on, you have write `$name' or 24823b57fe0aSwdenk `${name}'; to execute the contents of a variable 24833b57fe0aSwdenk directly type `$name' at the command prompt. 2484c609719bSwdenk 2485c609719bSwdenk Global environment variables are those you use 2486c609719bSwdenk setenv/printenv to work with. To run a command stored 2487c609719bSwdenk in such a variable, you need to use the run command, 2488c609719bSwdenk and you must not use the '$' sign to access them. 2489c609719bSwdenk 2490c609719bSwdenk To store commands and special characters in a 2491c609719bSwdenk variable, please use double quotation marks 2492c609719bSwdenk surrounding the whole text of the variable, instead 2493c609719bSwdenk of the backslashes before semicolons and special 2494c609719bSwdenk symbols. 2495c609719bSwdenk 2496aa0c71acSWolfgang Denk- Commandline Editing and History: 2497aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2498aa0c71acSWolfgang Denk 249911ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2500aa0c71acSWolfgang Denk commandline input operations 2501aa0c71acSWolfgang Denk 2502a8c7c708Swdenk- Default Environment: 2503c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2504c609719bSwdenk 2505c609719bSwdenk Define this to contain any number of null terminated 2506c609719bSwdenk strings (variable = value pairs) that will be part of 25077152b1d0Swdenk the default environment compiled into the boot image. 25082262cfeeSwdenk 2509c609719bSwdenk For example, place something like this in your 2510c609719bSwdenk board's config file: 2511c609719bSwdenk 2512c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2513c609719bSwdenk "myvar1=value1\0" \ 2514c609719bSwdenk "myvar2=value2\0" 2515c609719bSwdenk 2516c609719bSwdenk Warning: This method is based on knowledge about the 2517c609719bSwdenk internal format how the environment is stored by the 25182262cfeeSwdenk U-Boot code. This is NOT an official, exported 2519c609719bSwdenk interface! Although it is unlikely that this format 25207152b1d0Swdenk will change soon, there is no guarantee either. 2521c609719bSwdenk You better know what you are doing here. 2522c609719bSwdenk 2523c609719bSwdenk Note: overly (ab)use of the default environment is 2524c609719bSwdenk discouraged. Make sure to check other ways to preset 252574de7aefSWolfgang Denk the environment like the "source" command or the 2526c609719bSwdenk boot command first. 2527c609719bSwdenk 25285e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 25295e724ca2SStephen Warren 25305e724ca2SStephen Warren Define this in order to add variables describing the 25315e724ca2SStephen Warren U-Boot build configuration to the default environment. 25325e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 25335e724ca2SStephen Warren 25345e724ca2SStephen Warren Enabling this option will cause the following to be defined: 25355e724ca2SStephen Warren 25365e724ca2SStephen Warren - CONFIG_SYS_ARCH 25375e724ca2SStephen Warren - CONFIG_SYS_CPU 25385e724ca2SStephen Warren - CONFIG_SYS_BOARD 25395e724ca2SStephen Warren - CONFIG_SYS_VENDOR 25405e724ca2SStephen Warren - CONFIG_SYS_SOC 25415e724ca2SStephen Warren 25427e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 25437e27f89fSTom Rini 25447e27f89fSTom Rini Define this in order to add variables describing certain 25457e27f89fSTom Rini run-time determined information about the hardware to the 25467e27f89fSTom Rini environment. These will be named board_name, board_rev. 25477e27f89fSTom Rini 254806fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 254906fd8538SSimon Glass 255006fd8538SSimon Glass Normally the environment is loaded when the board is 255106fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 255206fd8538SSimon Glass that so that the environment is not available until 255306fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 255406fd8538SSimon Glass this is instead controlled by the value of 255506fd8538SSimon Glass /config/load-environment. 255606fd8538SSimon Glass 2557a8c7c708Swdenk- DataFlash Support: 25582abbe075Swdenk CONFIG_HAS_DATAFLASH 25592abbe075Swdenk 25602abbe075Swdenk Defining this option enables DataFlash features and 25612abbe075Swdenk allows to read/write in Dataflash via the standard 25622abbe075Swdenk commands cp, md... 25632abbe075Swdenk 2564f61ec45eSEric Nelson- Serial Flash support 2565f61ec45eSEric Nelson CONFIG_CMD_SF 2566f61ec45eSEric Nelson 2567f61ec45eSEric Nelson Defining this option enables SPI flash commands 2568f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2569f61ec45eSEric Nelson 2570f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2571f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2572f61ec45eSEric Nelson commands. 2573f61ec45eSEric Nelson 2574f61ec45eSEric Nelson The following defaults may be provided by the platform 2575f61ec45eSEric Nelson to handle the common case when only a single serial 2576f61ec45eSEric Nelson flash is present on the system. 2577f61ec45eSEric Nelson 2578f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2579f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2580f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2581f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2582f61ec45eSEric Nelson 258324007273SSimon Glass CONFIG_CMD_SF_TEST 258424007273SSimon Glass 258524007273SSimon Glass Define this option to include a destructive SPI flash 258624007273SSimon Glass test ('sf test'). 258724007273SSimon Glass 25881dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 25891dcd6d03SJagannadha Sutradharudu Teki 25901dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 25911dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 25921dcd6d03SJagannadha Sutradharudu Teki 25933f85ce27Swdenk- SystemACE Support: 25943f85ce27Swdenk CONFIG_SYSTEMACE 25953f85ce27Swdenk 25963f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 25973f85ce27Swdenk chips attached via some sort of local bus. The address 259811ccc33fSMarcel Ziswiler of the chip must also be defined in the 25996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 26003f85ce27Swdenk 26013f85ce27Swdenk #define CONFIG_SYSTEMACE 26026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 26033f85ce27Swdenk 26043f85ce27Swdenk When SystemACE support is added, the "ace" device type 26053f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 26063f85ce27Swdenk 2607ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2608ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2609ecb0ccd9SWolfgang Denk 261028cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2611ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 261228cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2613ecb0ccd9SWolfgang Denk number generator is used. 2614ecb0ccd9SWolfgang Denk 261528cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 261628cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 261728cb9375SWolfgang Denk defined, the normal port 69 is used. 261828cb9375SWolfgang Denk 261928cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2620ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2621ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2622ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2623ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2624ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2625ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2626ecb0ccd9SWolfgang Denk 2627bf36c5d5SSimon Glass- Hashing support: 2628bf36c5d5SSimon Glass CONFIG_CMD_HASH 2629bf36c5d5SSimon Glass 2630bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2631bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2632bf36c5d5SSimon Glass 2633bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2634bf36c5d5SSimon Glass 2635bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2636bf36c5d5SSimon Glass size a little. 2637bf36c5d5SSimon Glass 2638bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2639bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2640bf36c5d5SSimon Glass 2641bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2642bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2643bf36c5d5SSimon Glass 2644a11f1873SRobert Winkler- Freescale i.MX specific commands: 2645a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2646a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2647a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2648a11f1873SRobert Winkler 2649a11f1873SRobert Winkler CONFIG_CMD_BMODE 2650a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2651a11f1873SRobert Winkler a boot from specific media. 2652a11f1873SRobert Winkler 2653a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2654a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2655a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2656a11f1873SRobert Winkler will set it back to normal. This command currently 2657a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2658a11f1873SRobert Winkler 265919c402afSSimon Glass- Signing support: 266019c402afSSimon Glass CONFIG_RSA 266119c402afSSimon Glass 266219c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 266319c402afSSimon Glass in U-Boot. See doc/uImage/signature for more information. 266419c402afSSimon Glass 266519c402afSSimon Glass The signing part is build into mkimage regardless of this 266619c402afSSimon Glass option. 266719c402afSSimon Glass 266819c402afSSimon Glass 2669a8c7c708Swdenk- Show boot progress: 2670c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2671c609719bSwdenk 2672c609719bSwdenk Defining this option allows to add some board- 2673c609719bSwdenk specific code (calling a user-provided function 2674c609719bSwdenk "show_boot_progress(int)") that enables you to show 2675c609719bSwdenk the system's boot progress on some display (for 2676c609719bSwdenk example, some LED's) on your board. At the moment, 2677c609719bSwdenk the following checkpoints are implemented: 2678c609719bSwdenk 26793a608ca0SSimon Glass- Detailed boot stage timing 26803a608ca0SSimon Glass CONFIG_BOOTSTAGE 26813a608ca0SSimon Glass Define this option to get detailed timing of each stage 26823a608ca0SSimon Glass of the boot process. 26833a608ca0SSimon Glass 26843a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 26853a608ca0SSimon Glass This is the number of available user bootstage records. 26863a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 26873a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 26883a608ca0SSimon Glass the limit, recording will stop. 26893a608ca0SSimon Glass 26903a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 26913a608ca0SSimon Glass Define this to print a report before boot, similar to this: 26923a608ca0SSimon Glass 26933a608ca0SSimon Glass Timer summary in microseconds: 26943a608ca0SSimon Glass Mark Elapsed Stage 26953a608ca0SSimon Glass 0 0 reset 26963a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 26973a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 26983a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 26993a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 27003a608ca0SSimon Glass 3,910,375 250,777 main_loop 27013a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 27023a608ca0SSimon Glass 30,361,327 445,160 start_kernel 27033a608ca0SSimon Glass 27042eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 27052eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 27062eba38cfSSimon Glass and un/stashing of bootstage data. 27072eba38cfSSimon Glass 270894fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 270994fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 271094fd1316SSimon Glass node is created with each bootstage id as a child. Each child 271194fd1316SSimon Glass has a 'name' property and either 'mark' containing the 271294fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 271394fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 271494fd1316SSimon Glass For example: 271594fd1316SSimon Glass 271694fd1316SSimon Glass bootstage { 271794fd1316SSimon Glass 154 { 271894fd1316SSimon Glass name = "board_init_f"; 271994fd1316SSimon Glass mark = <3575678>; 272094fd1316SSimon Glass }; 272194fd1316SSimon Glass 170 { 272294fd1316SSimon Glass name = "lcd"; 272394fd1316SSimon Glass accum = <33482>; 272494fd1316SSimon Glass }; 272594fd1316SSimon Glass }; 272694fd1316SSimon Glass 272794fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 272894fd1316SSimon Glass 27291372cce2SMarian BalakowiczLegacy uImage format: 27301372cce2SMarian Balakowicz 2731c609719bSwdenk Arg Where When 2732c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2733c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2734c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2735c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2736c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2737c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2738c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2739c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2740c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 27411372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2742c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2743c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2744c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2745c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 27461372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2747c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 27481372cce2SMarian Balakowicz 27491372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 27501372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 27511372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 27521372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 27531372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 27541372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 27551372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 275611ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 27571372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 27581372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 27591372cce2SMarian Balakowicz 2760ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2761c609719bSwdenk 2762a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 276363e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 276463e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 276563e73c9aSwdenk 2766566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2767566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2768566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2769566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2770566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2771566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2772566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2773566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2774566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2775566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2776566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2777566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2778566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2779566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2780566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2781566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2782566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2783566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2784566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2785566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2786566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2787566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2788566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2789566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2790566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2791566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2792566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2793566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2794566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2795566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2796566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2797566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2798566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2799566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2800566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2801566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2802566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2803566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2804566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2805566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2806566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2807566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2808566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2809566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2810566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2811566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2812566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2813c609719bSwdenk 2814566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2815c609719bSwdenk 2816566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2817566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2818566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2819206c60cbSwdenk 2820566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2821566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 282211ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2823566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2824566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2825566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 282674de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 282774de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2828566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2829c609719bSwdenk 28301372cce2SMarian BalakowiczFIT uImage format: 28311372cce2SMarian Balakowicz 28321372cce2SMarian Balakowicz Arg Where When 28331372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 28341372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 28351372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 28361372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 28371372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 28381372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2839f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 28401372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 28411372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 28421372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 28431372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 28441372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 284511ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 284611ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 28471372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 28481372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 28491372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 28501372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 28511372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 28521372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 28531372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 28541372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 28551372cce2SMarian Balakowicz 28561372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 28571372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 28581372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 285911ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 28601372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 28611372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 28621372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 28631372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 28641372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 28651372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 28661372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 28671372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 28681372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 28691372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 28701372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 28711372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 28721372cce2SMarian Balakowicz 287311ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 28741372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 28751372cce2SMarian Balakowicz 287611ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 28771372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 28781372cce2SMarian Balakowicz 287911ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 28801372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 28811372cce2SMarian Balakowicz 2882d95f6ec7SGabe Black- FIT image support: 2883d95f6ec7SGabe Black CONFIG_FIT 2884d95f6ec7SGabe Black Enable support for the FIT uImage format. 2885d95f6ec7SGabe Black 2886d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 2887d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 2888d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 2889d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 2890d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 2891d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 2892d95f6ec7SGabe Black 28933e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 28943e569a6bSSimon Glass This option enables signature verification of FIT uImages, 28953e569a6bSSimon Glass using a hash signed and verified using RSA. See 28963e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 28973e569a6bSSimon Glass 28984cf2609bSWolfgang Denk- Standalone program support: 28994cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 29004cf2609bSWolfgang Denk 29016feff899SWolfgang Denk This option defines a board specific value for the 29026feff899SWolfgang Denk address where standalone program gets loaded, thus 29036feff899SWolfgang Denk overwriting the architecture dependent default 29044cf2609bSWolfgang Denk settings. 29054cf2609bSWolfgang Denk 29064cf2609bSWolfgang Denk- Frame Buffer Address: 29074cf2609bSWolfgang Denk CONFIG_FB_ADDR 29084cf2609bSWolfgang Denk 29094cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 291044a53b57SWolfgang Denk address for frame buffer. This is typically the case 291144a53b57SWolfgang Denk when using a graphics controller has separate video 291244a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 291344a53b57SWolfgang Denk the given address instead of dynamically reserving it 291444a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 291544a53b57SWolfgang Denk the memory for the frame buffer depending on the 291644a53b57SWolfgang Denk configured panel size. 29174cf2609bSWolfgang Denk 29184cf2609bSWolfgang Denk Please see board_init_f function. 29194cf2609bSWolfgang Denk 2920cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2921cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2922cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2923cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2924cccfc2abSDetlev Zundel 2925cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2926cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2927cccfc2abSDetlev Zundel 2928cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2929cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2930cccfc2abSDetlev Zundel 2931cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2932cccfc2abSDetlev Zundel Needed for mtdparts command support. 2933cccfc2abSDetlev Zundel 2934cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2935cccfc2abSDetlev Zundel 2936cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2937cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2938cccfc2abSDetlev Zundel 293970c219cdSJoe Hershberger- UBI support 294070c219cdSJoe Hershberger CONFIG_CMD_UBI 294170c219cdSJoe Hershberger 294270c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 294370c219cdSJoe Hershberger with the UBI flash translation layer 294470c219cdSJoe Hershberger 294570c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 294670c219cdSJoe Hershberger 2947147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 2948147162daSJoe Hershberger 2949147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 2950147162daSJoe Hershberger warnings and errors enabled. 2951147162daSJoe Hershberger 295270c219cdSJoe Hershberger- UBIFS support 295370c219cdSJoe Hershberger CONFIG_CMD_UBIFS 295470c219cdSJoe Hershberger 295570c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 295670c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 295770c219cdSJoe Hershberger 295870c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 295970c219cdSJoe Hershberger 2960147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 2961147162daSJoe Hershberger 2962147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 2963147162daSJoe Hershberger warnings and errors enabled. 2964147162daSJoe Hershberger 29656a11cf48SDaniel Schwierzeck- SPL framework 29666a11cf48SDaniel Schwierzeck CONFIG_SPL 29676a11cf48SDaniel Schwierzeck Enable building of SPL globally. 29686a11cf48SDaniel Schwierzeck 296995579793STom Rini CONFIG_SPL_LDSCRIPT 297095579793STom Rini LDSCRIPT for linking the SPL binary. 297195579793STom Rini 29726ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 29736ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 29746ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 29756ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 29768960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 29776ebc3461SAlbert ARIBAUD must not be both defined at the same time. 29786ebc3461SAlbert ARIBAUD 297995579793STom Rini CONFIG_SPL_MAX_SIZE 29806ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 29816ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 29826ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 29836ebc3461SAlbert ARIBAUD not exceed it. 298495579793STom Rini 29856a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 29866a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 29876a11cf48SDaniel Schwierzeck 298894a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 298994a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 299094a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 299194a45bb1SScott Wood 299295579793STom Rini CONFIG_SPL_BSS_START_ADDR 299395579793STom Rini Link address for the BSS within the SPL binary. 299495579793STom Rini 299595579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 29966ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 29976ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 29986ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 29998960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 30006ebc3461SAlbert ARIBAUD must not be both defined at the same time. 300195579793STom Rini 300295579793STom Rini CONFIG_SPL_STACK 300395579793STom Rini Adress of the start of the stack SPL will use 300495579793STom Rini 300594a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 300694a45bb1SScott Wood Adress of the start of the stack SPL will use after 300794a45bb1SScott Wood relocation. If unspecified, this is equal to 300894a45bb1SScott Wood CONFIG_SPL_STACK. 300994a45bb1SScott Wood 301095579793STom Rini CONFIG_SYS_SPL_MALLOC_START 301195579793STom Rini Starting address of the malloc pool used in SPL. 301295579793STom Rini 301395579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 301495579793STom Rini The size of the malloc pool used in SPL. 30156a11cf48SDaniel Schwierzeck 301647f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 301747f7bcaeSTom Rini Enable the SPL framework under common/. This framework 301847f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 301947f7bcaeSTom Rini NAND loading of the Linux Kernel. 302047f7bcaeSTom Rini 3021861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3022861a86f4STom Rini For ARM, enable an optional function to print more information 3023861a86f4STom Rini about the running system. 3024861a86f4STom Rini 30254b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 30264b919725SScott Wood Arch init code should be built for a very small image 30274b919725SScott Wood 30286a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 30296a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 30306a11cf48SDaniel Schwierzeck 30316a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 30326a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 30336a11cf48SDaniel Schwierzeck 30346a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 30356a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 30366a11cf48SDaniel Schwierzeck 30376a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 30386a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 30396a11cf48SDaniel Schwierzeck 30406a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 30416a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 30426a11cf48SDaniel Schwierzeck 304395579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 304495579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 304595579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 304695579793STom Rini Address, size and partition on the MMC to load U-Boot from 304795579793STom Rini when the MMC is being used in raw mode. 304895579793STom Rini 30492b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 30502b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 30512b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 30522b75b0adSPeter Korsgaard 30532b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 30542b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 30552b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 30562b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 30572b75b0adSPeter Korsgaard (for falcon mode) 30582b75b0adSPeter Korsgaard 305995579793STom Rini CONFIG_SPL_FAT_SUPPORT 306095579793STom Rini Support for fs/fat/libfat.o in SPL binary 306195579793STom Rini 306295579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 306395579793STom Rini Filename to read to load U-Boot when reading from FAT 306495579793STom Rini 30657ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 30667ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 30677ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 30687ad2cc79SPeter Korsgaard 30697ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 30707ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 30717ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 30727ad2cc79SPeter Korsgaard 307306f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 307406f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 307506f60ae3SScott Wood start.S waits for the rest of the SPL to load before 307606f60ae3SScott Wood continuing (the hardware starts execution after just 307706f60ae3SScott Wood loading the first page rather than the full 4K). 307806f60ae3SScott Wood 30796f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 30806f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 30816f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 30826f2f01b9SScott Wood 30836f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 30846f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 30856f2f01b9SScott Wood 30866f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 30876f2f01b9SScott Wood Include standard software ECC in the SPL 30886f2f01b9SScott Wood 308995579793STom Rini CONFIG_SPL_NAND_SIMPLE 30907d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 30917d4b7955SScott Wood expose the cmd_ctrl() interface. 309295579793STom Rini 3093bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3094bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 3095bb0dc108SYing Zhang arch/powerpc/cpu/mpc8xxx/ddr/libddr.o in SPL binary. 3096bb0dc108SYing Zhang 30977c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 30987c8eea59SYing Zhang Set for common ddr init with serial presence detect in 30997c8eea59SYing Zhang SPL binary. 31007c8eea59SYing Zhang 310195579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 310295579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 310395579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 310495579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 310595579793STom Rini CONFIG_SYS_NAND_ECCBYTES 310695579793STom Rini Defines the size and behavior of the NAND that SPL uses 31077d4b7955SScott Wood to read U-Boot 310895579793STom Rini 310995579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 31107d4b7955SScott Wood Location in NAND to read U-Boot from 31117d4b7955SScott Wood 31127d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 31137d4b7955SScott Wood Location in memory to load U-Boot to 31147d4b7955SScott Wood 31157d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 31167d4b7955SScott Wood Size of image to load 311795579793STom Rini 311895579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 31197d4b7955SScott Wood Entry point in loaded image to jump to 312095579793STom Rini 312195579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 312295579793STom Rini Define this if you need to first read the OOB and then the 312395579793STom Rini data. This is used for example on davinci plattforms. 312495579793STom Rini 312595579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 312695579793STom Rini Support for an OMAP3-specific set of functions to return the 312795579793STom Rini ID and MFR of the first attached NAND chip, if present. 312895579793STom Rini 31296a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 31306a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 31316a11cf48SDaniel Schwierzeck 31326a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 31336a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 31346a11cf48SDaniel Schwierzeck 31356a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 31366a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 31376a11cf48SDaniel Schwierzeck 3138c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3139c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3140c57b953dSPavel Machek 31416a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 31426a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 31431372cce2SMarian Balakowicz 3144ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3145ba1bee43SYing Zhang Support for the environment operating in SPL binary 3146ba1bee43SYing Zhang 3147ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3148ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3149ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3150ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3151ba1bee43SYing Zhang 315274752baaSScott Wood CONFIG_SPL_PAD_TO 31536113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 31546113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 31556113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 31566113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 31576113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 315874752baaSScott Wood 3159ca2fca22SScott Wood CONFIG_SPL_TARGET 3160ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3161ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3162ca2fca22SScott Wood example if more than one image needs to be produced. 3163ca2fca22SScott Wood 316487ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 316587ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 316687ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 316787ebee39SSimon Glass option to re-enable it. This will affect the output of the 316887ebee39SSimon Glass bootm command when booting a FIT image. 316987ebee39SSimon Glass 3170*3aa29de0SYing Zhang- TPL framework 3171*3aa29de0SYing Zhang CONFIG_TPL 3172*3aa29de0SYing Zhang Enable building of TPL globally. 3173*3aa29de0SYing Zhang 3174*3aa29de0SYing Zhang CONFIG_TPL_PAD_TO 3175*3aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 3176*3aa29de0SYing Zhang the TPL payload. By default, this is defined as 3177*3aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 3178*3aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 3179*3aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 3180*3aa29de0SYing Zhang 3181c609719bSwdenkModem Support: 3182c609719bSwdenk-------------- 3183c609719bSwdenk 3184566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3185c609719bSwdenk 318611ccc33fSMarcel Ziswiler- Modem support enable: 3187c609719bSwdenk CONFIG_MODEM_SUPPORT 3188c609719bSwdenk 3189c609719bSwdenk- RTS/CTS Flow control enable: 3190c609719bSwdenk CONFIG_HWFLOW 3191c609719bSwdenk 3192c609719bSwdenk- Modem debug support: 3193c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3194c609719bSwdenk 3195c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3196c609719bSwdenk for modem support. Useful only with BDI2000. 3197c609719bSwdenk 3198a8c7c708Swdenk- Interrupt support (PPC): 3199a8c7c708Swdenk 3200a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3201a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 320211ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3203a8c7c708Swdenk should set decrementer_count to appropriate value. If 320411ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3205a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 320611ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3207a8c7c708Swdenk specific handling. If board has watchdog / status_led 3208a8c7c708Swdenk / other_activity_monitor it works automatically from 3209a8c7c708Swdenk general timer_interrupt(). 3210a8c7c708Swdenk 3211c609719bSwdenk- General: 3212c609719bSwdenk 3213c609719bSwdenk In the target system modem support is enabled when a 3214c609719bSwdenk specific key (key combination) is pressed during 3215c609719bSwdenk power-on. Otherwise U-Boot will boot normally 321611ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3217c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3218c609719bSwdenk function, returning 1 and thus enabling modem 3219c609719bSwdenk initialization. 3220c609719bSwdenk 3221c609719bSwdenk If there are no modem init strings in the 3222c609719bSwdenk environment, U-Boot proceed to autoboot; the 3223c609719bSwdenk previous output (banner, info printfs) will be 322411ccc33fSMarcel Ziswiler suppressed, though. 3225c609719bSwdenk 3226c609719bSwdenk See also: doc/README.Modem 3227c609719bSwdenk 32289660e442SHelmut RaigerBoard initialization settings: 32299660e442SHelmut Raiger------------------------------ 32309660e442SHelmut Raiger 32319660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 32329660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 32339660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 32349660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 32359660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 32369660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 32379660e442SHelmut Raiger 32389660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 32399660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 32409660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 32419660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3242c609719bSwdenk 3243c609719bSwdenkConfiguration Settings: 3244c609719bSwdenk----------------------- 3245c609719bSwdenk 32466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3247c609719bSwdenk undefine this when you're short of memory. 3248c609719bSwdenk 32492fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 32502fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 32512fb2604dSPeter Tyser 32526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3253c609719bSwdenk prompt for user input. 3254c609719bSwdenk 32556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3256c609719bSwdenk 32576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3258c609719bSwdenk 32596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3260c609719bSwdenk 32616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3262c609719bSwdenk the application (usually a Linux kernel) when it is 3263c609719bSwdenk booted 3264c609719bSwdenk 32656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3266c609719bSwdenk List of legal baudrate settings for this board. 3267c609719bSwdenk 32686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3269c609719bSwdenk Suppress display of console information at boot. 3270c609719bSwdenk 32716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3272c609719bSwdenk If the board specific function 3273c609719bSwdenk extern int overwrite_console (void); 3274c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3275c609719bSwdenk serial port, else the settings in the environment are used. 3276c609719bSwdenk 32776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3278c609719bSwdenk Enable the call to overwrite_console(). 3279c609719bSwdenk 32806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3281c609719bSwdenk Enable overwrite of previous console environment settings. 3282c609719bSwdenk 32836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3284c609719bSwdenk Begin and End addresses of the area used by the 3285c609719bSwdenk simple memory test. 3286c609719bSwdenk 32876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3288c609719bSwdenk Enable an alternate, more extensive memory test. 3289c609719bSwdenk 32906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 32915f535fe1Swdenk Scratch address used by the alternate memory test 32925f535fe1Swdenk You only need to set this if address zero isn't writeable 32935f535fe1Swdenk 32946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 32956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 329614f73ca6SStefan Roese this specified memory area will get subtracted from the top 329711ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 329814f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 329914f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 330014f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 33015e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 330214f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 33035e12e75dSStefan Roese will have to get fixed in Linux additionally. 330414f73ca6SStefan Roese 330514f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 330614f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 330714f73ca6SStefan Roese be touched. 330814f73ca6SStefan Roese 330914f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 331014f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 331114f73ca6SStefan Roese then the end address of the Linux memory will be located at a 331214f73ca6SStefan Roese non page size aligned address and this could cause major 331314f73ca6SStefan Roese problems. 331414f73ca6SStefan Roese 33156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3316c609719bSwdenk Enable temporary baudrate change while serial download 3317c609719bSwdenk 33186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3319c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3320c609719bSwdenk 33216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3322c609719bSwdenk Physical start address of Motherboard I/O (if using a 3323c609719bSwdenk Cogent motherboard) 3324c609719bSwdenk 33256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3326c609719bSwdenk Physical start address of Flash memory. 3327c609719bSwdenk 33286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3329c609719bSwdenk Physical start address of boot monitor code (set by 3330c609719bSwdenk make config files to be same as the text base address 333114d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 33326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3333c609719bSwdenk 33346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 33353b57fe0aSwdenk Size of memory reserved for monitor code, used to 33363b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 33373b57fe0aSwdenk embedded within the U-Boot image, or in a separate 33383b57fe0aSwdenk flash sector. 3339c609719bSwdenk 33406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3341c609719bSwdenk Size of DRAM reserved for malloc() use. 3342c609719bSwdenk 33436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 334415940c9aSStefan Roese Normally compressed uImages are limited to an 334515940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 33466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 334715940c9aSStefan Roese to adjust this setting to your needs. 3348c609719bSwdenk 33496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3350c609719bSwdenk Maximum size of memory mapped by the startup code of 3351c609719bSwdenk the Linux kernel; all data that must be processed by 33527d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 33537d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 33547d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 33557d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3356c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3357c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3358c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3359c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3360c609719bSwdenk 3361fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3362fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3363fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3364fca43cc8SJohn Rigby is enabled. 3365fca43cc8SJohn Rigby 3366fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3367fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3368fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3369fca43cc8SJohn Rigby 3370fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3371fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3372fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3373fca43cc8SJohn Rigby 33746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3375c609719bSwdenk Max number of Flash memory banks 3376c609719bSwdenk 33776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3378c609719bSwdenk Max number of sectors on a Flash chip 3379c609719bSwdenk 33806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3381c609719bSwdenk Timeout for Flash erase operations (in ms) 3382c609719bSwdenk 33836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3384c609719bSwdenk Timeout for Flash write operations (in ms) 3385c609719bSwdenk 33866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 33878564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 33888564acf9Swdenk 33896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 33908564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 33918564acf9Swdenk 33926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 33938564acf9Swdenk If defined, hardware flash sectors protection is used 33948564acf9Swdenk instead of U-Boot software protection. 33958564acf9Swdenk 33966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3397c609719bSwdenk 3398c609719bSwdenk Enable TFTP transfers directly to flash memory; 3399c609719bSwdenk without this option such a download has to be 3400c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3401c609719bSwdenk copy from RAM to flash. 3402c609719bSwdenk 3403c609719bSwdenk The two-step approach is usually more reliable, since 3404c609719bSwdenk you can check if the download worked before you erase 340511ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 340611ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3407c609719bSwdenk downloaded image) this option may be very useful. 3408c609719bSwdenk 34096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3410c609719bSwdenk Define if the flash driver uses extra elements in the 34115653fc33Swdenk common flash structure for storing flash geometry. 34125653fc33Swdenk 341300b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 34145653fc33Swdenk This option also enables the building of the cfi_flash driver 34155653fc33Swdenk in the drivers directory 341653cf9435Sstroese 341791809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 341891809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 341991809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 342091809ed5SPiotr Ziecik to the MTD layer. 342191809ed5SPiotr Ziecik 34226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 342396ef831fSGuennadi Liakhovetski Use buffered writes to flash. 342496ef831fSGuennadi Liakhovetski 342596ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 342696ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 342796ef831fSGuennadi Liakhovetski write commands. 342896ef831fSGuennadi Liakhovetski 34296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 34305568e613SStefan Roese If this option is defined, the common CFI flash doesn't 34315568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 34325568e613SStefan Roese is useful, if some of the configured banks are only 34335568e613SStefan Roese optionally available. 34345568e613SStefan Roese 34359a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 34369a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 34379a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 34389a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 34399a042e9cSJerry Van Baren 3440352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3441352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3442352ef3f1SStefan Roese against the source after the write operation. An error message 3443352ef3f1SStefan Roese will be printed when the contents are not identical. 3444352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3445352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3446352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3447352ef3f1SStefan Roese this option if you really know what you are doing. 3448352ef3f1SStefan Roese 34496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 345011ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 345111ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 345253cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 345353cf9435Sstroese buffers can be full shortly after enabling the interface 345411ccc33fSMarcel Ziswiler on high Ethernet traffic. 345553cf9435Sstroese Defaults to 4 if not defined. 3456c609719bSwdenk 3457ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3458ea882bafSWolfgang Denk 3459ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3460ea882bafSWolfgang Denk internally to store the environment settings. The default 3461ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3462ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3463ea882bafSWolfgang Denk lib/hashtable.c for details. 3464ea882bafSWolfgang Denk 34652598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 34662598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 34672598090bSJoe Hershberger Enable validation of the values given to enviroment variables when 34682598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 34692598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 34702598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 34712598090bSJoe Hershberger 34722598090bSJoe Hershberger The format of the list is: 34732598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3474267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3475267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 34762598090bSJoe Hershberger entry = variable_name[:attributes] 34772598090bSJoe Hershberger list = entry[,list] 34782598090bSJoe Hershberger 34792598090bSJoe Hershberger The type attributes are: 34802598090bSJoe Hershberger s - String (default) 34812598090bSJoe Hershberger d - Decimal 34822598090bSJoe Hershberger x - Hexadecimal 34832598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 34842598090bSJoe Hershberger i - IP address 34852598090bSJoe Hershberger m - MAC address 34862598090bSJoe Hershberger 3487267541f7SJoe Hershberger The access attributes are: 3488267541f7SJoe Hershberger a - Any (default) 3489267541f7SJoe Hershberger r - Read-only 3490267541f7SJoe Hershberger o - Write-once 3491267541f7SJoe Hershberger c - Change-default 3492267541f7SJoe Hershberger 34932598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 34942598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 34952598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 34962598090bSJoe Hershberger 34972598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 34982598090bSJoe Hershberger Define this to a list (string) to define validation that 34992598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 35002598090bSJoe Hershberger environment variable. To override a setting in the static 35012598090bSJoe Hershberger list, simply add an entry for the same variable name to the 35022598090bSJoe Hershberger ".flags" variable. 35032598090bSJoe Hershberger 3504267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3505267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3506267541f7SJoe Hershberger access flags. 3507267541f7SJoe Hershberger 35085c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 35095c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 35105c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 35115c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 35125c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 35135c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 35145c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 35155c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 35165c1a7ea6SSimon Glass your board please report the problem and send patches! 35175c1a7ea6SSimon Glass 3518632efa74SSimon Glass- CONFIG_SYS_SYM_OFFSETS 3519632efa74SSimon Glass This is set by architectures that use offsets for link symbols 3520632efa74SSimon Glass instead of absolute values. So bss_start is obtained using an 3521632efa74SSimon Glass offset _bss_start_ofs from CONFIG_SYS_TEXT_BASE, rather than 3522632efa74SSimon Glass directly. You should not need to touch this setting. 3523632efa74SSimon Glass 35240b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 35250b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 35260b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 35270b1b60c7SLokesh Vutla the value can be calulated on a given board. 3528632efa74SSimon Glass 3529c609719bSwdenkThe following definitions that deal with the placement and management 3530c609719bSwdenkof environment data (variable area); in general, we support the 3531c609719bSwdenkfollowing configurations: 3532c609719bSwdenk 3533c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3534c3eb3fe4SMike Frysinger 3535c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3536c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3537c3eb3fe4SMike Frysinger 35385a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3539c609719bSwdenk 3540c609719bSwdenk Define this if the environment is in flash memory. 3541c609719bSwdenk 3542c609719bSwdenk a) The environment occupies one whole flash sector, which is 3543c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3544c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3545c609719bSwdenk sector" type flash chips, which have several smaller 3546c609719bSwdenk sectors at the start or the end. For instance, such a 3547c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3548c609719bSwdenk such a case you would place the environment in one of the 3549c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3550c609719bSwdenk "top boot sector" type flash chips, you would put the 3551c609719bSwdenk environment in one of the last sectors, leaving a gap 3552c609719bSwdenk between U-Boot and the environment. 3553c609719bSwdenk 35540e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3555c609719bSwdenk 3556c609719bSwdenk Offset of environment data (variable area) to the 3557c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3558c609719bSwdenk type flash chips the second sector can be used: the offset 3559c609719bSwdenk for this sector is given here. 3560c609719bSwdenk 35616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3562c609719bSwdenk 35630e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3564c609719bSwdenk 3565c609719bSwdenk This is just another way to specify the start address of 3566c609719bSwdenk the flash sector containing the environment (instead of 35670e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3568c609719bSwdenk 35690e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3570c609719bSwdenk 3571c609719bSwdenk Size of the sector containing the environment. 3572c609719bSwdenk 3573c609719bSwdenk 3574c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3575c609719bSwdenk In such a case you don't want to spend a whole sector for 3576c609719bSwdenk the environment. 3577c609719bSwdenk 35780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3579c609719bSwdenk 35805a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 35810e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3582c609719bSwdenk of this flash sector for the environment. This saves 3583c609719bSwdenk memory for the RAM copy of the environment. 3584c609719bSwdenk 3585c609719bSwdenk It may also save flash memory if you decide to use this 3586c609719bSwdenk when your environment is "embedded" within U-Boot code, 3587c609719bSwdenk since then the remainder of the flash sector could be used 3588c609719bSwdenk for U-Boot code. It should be pointed out that this is 3589c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3590c609719bSwdenk updating the environment in flash makes it always 3591c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3592c609719bSwdenk wrong before the contents has been restored from a copy in 3593c609719bSwdenk RAM, your target system will be dead. 3594c609719bSwdenk 35950e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 35960e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3597c609719bSwdenk 3598c609719bSwdenk These settings describe a second storage area used to hold 359911ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 36003e38691eSwdenk a valid backup copy in case there is a power failure during 3601c609719bSwdenk a "saveenv" operation. 3602c609719bSwdenk 3603c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3604c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3605c609719bSwdenkaccordingly! 3606c609719bSwdenk 3607c609719bSwdenk 36089314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3609c609719bSwdenk 3610c609719bSwdenk Define this if you have some non-volatile memory device 3611c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3612c609719bSwdenk environment. 3613c609719bSwdenk 36140e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 36150e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3616c609719bSwdenk 361711ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3618c609719bSwdenk want to use for environment. It is assumed that this memory 3619c609719bSwdenk can just be read and written to, without any special 3620c609719bSwdenk provision. 3621c609719bSwdenk 3622c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3623c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 362411ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3625c609719bSwdenkU-Boot will hang. 3626c609719bSwdenk 3627c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3628c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3629c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3630c609719bSwdenkto save the current settings. 3631c609719bSwdenk 3632c609719bSwdenk 3633bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3634c609719bSwdenk 3635c609719bSwdenk Use this if you have an EEPROM or similar serial access 3636c609719bSwdenk device and a driver for it. 3637c609719bSwdenk 36380e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 36390e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3640c609719bSwdenk 3641c609719bSwdenk These two #defines specify the offset and size of the 3642c609719bSwdenk environment area within the total memory of your EEPROM. 3643c609719bSwdenk 36446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3645c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3646c609719bSwdenk The default address is zero. 3647c609719bSwdenk 36486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3649c609719bSwdenk If defined, the number of bits used to address bytes in a 3650c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3651c609719bSwdenk would require six bits. 3652c609719bSwdenk 36536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3654c609719bSwdenk If defined, the number of milliseconds to delay between 3655c609719bSwdenk page writes. The default is zero milliseconds. 3656c609719bSwdenk 36576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3658c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3659c609719bSwdenk that this is NOT the chip address length! 3660c609719bSwdenk 36616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 36625cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 36635cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 36645cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 36655cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 36665cf91d6bSwdenk byte chips. 36675cf91d6bSwdenk 36685cf91d6bSwdenk Note that we consider the length of the address field to 36695cf91d6bSwdenk still be one byte because the extra address bits are hidden 36705cf91d6bSwdenk in the chip address. 36715cf91d6bSwdenk 36726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3673c609719bSwdenk The size in bytes of the EEPROM device. 3674c609719bSwdenk 3675548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3676548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3677548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3678548738b4SHeiko Schocher 3679548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3680548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3681548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3682548738b4SHeiko Schocher EEPROM. For example: 3683548738b4SHeiko Schocher 3684ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3685548738b4SHeiko Schocher 3686548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3687548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3688c609719bSwdenk 3689057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 36905779d8d9Swdenk 36915779d8d9Swdenk Define this if you have a DataFlash memory device which you 36925779d8d9Swdenk want to use for the environment. 36935779d8d9Swdenk 36940e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 36950e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 36960e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 36975779d8d9Swdenk 36985779d8d9Swdenk These three #defines specify the offset and size of the 36995779d8d9Swdenk environment area within the total memory of your DataFlash placed 37005779d8d9Swdenk at the specified address. 37015779d8d9Swdenk 37020a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 37030a85a9e7SLiu Gang 37040a85a9e7SLiu Gang Define this if you have a remote memory space which you 37050a85a9e7SLiu Gang want to use for the local device's environment. 37060a85a9e7SLiu Gang 37070a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 37080a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 37090a85a9e7SLiu Gang 37100a85a9e7SLiu Gang These two #defines specify the address and size of the 37110a85a9e7SLiu Gang environment area within the remote memory space. The 37120a85a9e7SLiu Gang local device can get the environment from remote memory 3713fc54c7faSLiu Gang space by SRIO or PCIE links. 37140a85a9e7SLiu Gang 37150a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 37160a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3717fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3718fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 37190a85a9e7SLiu Gang 372051bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 372113a5695bSwdenk 372213a5695bSwdenk Define this if you have a NAND device which you want to use 372313a5695bSwdenk for the environment. 372413a5695bSwdenk 37250e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 37260e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 372713a5695bSwdenk 372813a5695bSwdenk These two #defines specify the offset and size of the environment 3729fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3730fdd813deSScott Wood aligned to an erase block boundary. 37315779d8d9Swdenk 3732fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3733e443c944SMarkus Klotzbuecher 37340e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3735fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3736fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3737fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3738fdd813deSScott Wood aligned to an erase block boundary. 3739e443c944SMarkus Klotzbuecher 3740fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3741fdd813deSScott Wood 3742fdd813deSScott Wood Specifies the length of the region in which the environment 3743fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3744fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3745fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3746fdd813deSScott Wood the range to be avoided. 3747fdd813deSScott Wood 3748fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3749fdd813deSScott Wood 3750fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3751fdd813deSScott Wood environment from block zero's out-of-band data. The 3752fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3753fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3754fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3755e443c944SMarkus Klotzbuecher 3756b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3757b74ab737SGuennadi Liakhovetski 3758b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3759b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3760b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3761b74ab737SGuennadi Liakhovetski 37622b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 37632b74433fSJoe Hershberger 37642b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 37652b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 37662b74433fSJoe Hershberger accesses, which is important on NAND. 37672b74433fSJoe Hershberger 37682b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 37692b74433fSJoe Hershberger 37702b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 37712b74433fSJoe Hershberger 37722b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 37732b74433fSJoe Hershberger 37742b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 37752b74433fSJoe Hershberger environment in. 37762b74433fSJoe Hershberger 3777785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 3778785881f7SJoe Hershberger 3779785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 3780785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 3781785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 3782785881f7SJoe Hershberger 37832b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 37842b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 37852b74433fSJoe Hershberger 37862b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 37872b74433fSJoe Hershberger when storing the env in UBI. 37882b74433fSJoe Hershberger 378906e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 379006e4ae5fSStephen Warren 379106e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 379206e4ae5fSStephen Warren environment. 379306e4ae5fSStephen Warren 379406e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 379506e4ae5fSStephen Warren 379606e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 379706e4ae5fSStephen Warren 379806e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 379906e4ae5fSStephen Warren 380006e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 380106e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 380206e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 380306e4ae5fSStephen Warren 380406e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 380506e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 380606e4ae5fSStephen Warren 380706e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 380806e4ae5fSStephen Warren area within the specified MMC device. 380906e4ae5fSStephen Warren 38105c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 38115c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 38125c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 38135c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 38145c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 38155c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 38165c088ee8SStephen Warren maximum possible space before it, to store other data. 38175c088ee8SStephen Warren 381806e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 381906e4ae5fSStephen Warren MMC sector boundary. 382006e4ae5fSStephen Warren 382106e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 382206e4ae5fSStephen Warren 382306e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 382406e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 382506e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 382606e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 382706e4ae5fSStephen Warren 38285c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 38295c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 38305c088ee8SStephen Warren 383106e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 383206e4ae5fSStephen Warren an MMC sector boundary. 383306e4ae5fSStephen Warren 383406e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 383506e4ae5fSStephen Warren 383606e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 383706e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 383806e4ae5fSStephen Warren CONFIG_ENV_SIZE. 383906e4ae5fSStephen Warren 38406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3841c609719bSwdenk 3842c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3843c609719bSwdenk area is used at an early stage (ROM part) if the environment 3844c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3845c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3846c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3847c609719bSwdenk to be a good choice since it makes it far enough from the 3848c609719bSwdenk start of the data area as well as from the stack pointer. 3849c609719bSwdenk 3850e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3851c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3852cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3853c609719bSwdenkuntil then to read environment variables. 3854c609719bSwdenk 385585ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 385685ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 385785ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 385885ec0bccSwdenknecessary, because the first environment variable we need is the 385985ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 386085ec0bccSwdenkhave any device yet where we could complain.] 3861c609719bSwdenk 3862c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3863c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 386485ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3865c609719bSwdenk 38666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3867fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3868fc3e2165Swdenk 38696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3870fc3e2165Swdenk also needs to be defined. 3871fc3e2165Swdenk 38726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3873fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3874c609719bSwdenk 3875f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3876f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3877f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3878f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3879f5675aa5SRon Madrid space for already greatly restricted images, including but not 3880f5675aa5SRon Madrid limited to NAND_SPL configurations. 3881f5675aa5SRon Madrid 3882b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 3883b2b92f53SSimon Glass Display information about the board that U-Boot is running on 3884b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 3885b2b92f53SSimon Glass to do this. 3886b2b92f53SSimon Glass 3887e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 3888e2e3e2b1SSimon Glass Similar to the previous option, but display this information 3889e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 3890e2e3e2b1SSimon Glass present. 3891e2e3e2b1SSimon Glass 3892c609719bSwdenkLow Level (hardware related) configuration options: 3893dc7c9a1aSwdenk--------------------------------------------------- 3894c609719bSwdenk 38956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3896c609719bSwdenk Cache Line Size of the CPU. 3897c609719bSwdenk 38986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3899c609719bSwdenk Default address of the IMMR after system reset. 39002535d602Swdenk 39012535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 39022535d602Swdenk and RPXsuper) to be able to adjust the position of 39032535d602Swdenk the IMMR register after a reset. 3904c609719bSwdenk 3905e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3906e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3907e46fedfeSTimur Tabi PowerPC SOCs. 3908e46fedfeSTimur Tabi 3909e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3910e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3911e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3912e46fedfeSTimur Tabi 3913e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3914e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3915e46fedfeSTimur Tabi 3916e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3917e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3918e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3919e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3920e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3921e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3922e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3923e46fedfeSTimur Tabi 3924e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3925e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3926e46fedfeSTimur Tabi 3927e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3928e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3929e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3930e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3931e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3932e46fedfeSTimur Tabi 3933e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3934e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3935e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3936e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3937e46fedfeSTimur Tabi 3938e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3939e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3940e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3941e46fedfeSTimur Tabi 39427f6c2cbcSwdenk- Floppy Disk Support: 39436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 39447f6c2cbcSwdenk 39457f6c2cbcSwdenk the default drive number (default value 0) 39467f6c2cbcSwdenk 39476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 39487f6c2cbcSwdenk 394911ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 39507f6c2cbcSwdenk (default value 1) 39517f6c2cbcSwdenk 39526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 39537f6c2cbcSwdenk 39547f6c2cbcSwdenk defines the offset of register from address. It 39557f6c2cbcSwdenk depends on which part of the data bus is connected to 395611ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 39577f6c2cbcSwdenk 39586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 39596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 39607f6c2cbcSwdenk default value. 39617f6c2cbcSwdenk 39626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 39637f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 39647f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 39657f6c2cbcSwdenk source code. It is used to make hardware dependant 39667f6c2cbcSwdenk initializations. 39677f6c2cbcSwdenk 39680abddf82SMacpaul Lin- CONFIG_IDE_AHB: 39690abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 39700abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 39710abddf82SMacpaul Lin When software is doing ATA command and data transfer to 39720abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 39730abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 39740abddf82SMacpaul Lin is requierd. 39750abddf82SMacpaul Lin 39766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 397725d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 397825d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3979c609719bSwdenk 39806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3981c609719bSwdenk 39827152b1d0Swdenk Start address of memory area that can be used for 3983c609719bSwdenk initial data and stack; please note that this must be 3984c609719bSwdenk writable memory that is working WITHOUT special 3985c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3986c609719bSwdenk will become available only after programming the 3987c609719bSwdenk memory controller and running certain initialization 3988c609719bSwdenk sequences. 3989c609719bSwdenk 3990c609719bSwdenk U-Boot uses the following memory types: 3991c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3992c609719bSwdenk - MPC824X: data cache 3993c609719bSwdenk - PPC4xx: data cache 3994c609719bSwdenk 39956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3996c609719bSwdenk 3997c609719bSwdenk Offset of the initial data structure in the memory 39986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 39996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4000c609719bSwdenk data is located at the end of the available space 4001553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 40026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 40036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 40046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4005c609719bSwdenk 4006c609719bSwdenk Note: 4007c609719bSwdenk On the MPC824X (or other systems that use the data 4008c609719bSwdenk cache for initial memory) the address chosen for 40096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4010c609719bSwdenk point to an otherwise UNUSED address space between 4011c609719bSwdenk the top of RAM and the start of the PCI space. 4012c609719bSwdenk 40136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4014c609719bSwdenk 40156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4016c609719bSwdenk 40176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4018c609719bSwdenk 40196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4020c609719bSwdenk 40216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4022c609719bSwdenk 40236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4024c609719bSwdenk 40256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4026c609719bSwdenk SDRAM timing 4027c609719bSwdenk 40286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4029c609719bSwdenk periodic timer for refresh 4030c609719bSwdenk 40316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4032c609719bSwdenk 40336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 40346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 40356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 40366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4037c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4038c609719bSwdenk 4039c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 40406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 40416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4042c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4043c609719bSwdenk 40446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 40456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4046c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4047c609719bSwdenk Prescaler definitions (SDRAM timing) 4048c609719bSwdenk 40496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4050c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4051c609719bSwdenk define relocation offset in DPRAM [DSP2] 4052c609719bSwdenk 40536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4054b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4055b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4056b423d055SHeiko Schocher 40576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4058c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4059c609719bSwdenk define relocation offset in DPRAM [SCC4] 4060c609719bSwdenk 40616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4062c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4063c609719bSwdenk wrong setting might damage your board. Read 4064c609719bSwdenk doc/README.MBX before setting this variable! 4065c609719bSwdenk 40666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4067ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4068ea909b76Swdenk (Power On Self Tests). This definition overrides 4069ea909b76Swdenk #define'd default value in commproc.h resp. 4070ea909b76Swdenk cpm_8260.h. 4071ea909b76Swdenk 40726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 40736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 40746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 40756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 40766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 40776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 40786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 40796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4080a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 40815d232d0eSwdenk 40829cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 40839cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 40849cacf4fcSDirk Eibach required. 40859cacf4fcSDirk Eibach 408669fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 408769fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 408869fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 408969fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 409069fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 409169fd2d3bSAndrew Sharp by coreboot or similar. 409269fd2d3bSAndrew Sharp 4093842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4094842033e6SGabor Juhos Enable support for indirect PCI bridges. 4095842033e6SGabor Juhos 4096a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4097a09b9b68SKumar Gala Chip has SRIO or not 4098a09b9b68SKumar Gala 4099a09b9b68SKumar Gala- CONFIG_SRIO1: 4100a09b9b68SKumar Gala Board has SRIO 1 port available 4101a09b9b68SKumar Gala 4102a09b9b68SKumar Gala- CONFIG_SRIO2: 4103a09b9b68SKumar Gala Board has SRIO 2 port available 4104a09b9b68SKumar Gala 4105c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4106c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4107c8b28152SLiu Gang 4108a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4109a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4110a09b9b68SKumar Gala 4111a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4112a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4113a09b9b68SKumar Gala 4114a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4115a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4116a09b9b68SKumar Gala 411766bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 411866bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 411966bd1846SFabio Estevam a 16 bit bus. 412066bd1846SFabio Estevam Not all NAND drivers use this symbol. 4121a430e916SFabio Estevam Example of drivers that use it: 412266bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4123a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4124eced4626SAlex Waterman 4125eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4126eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4127eced4626SAlex Waterman a default value will be used. 4128eced4626SAlex Waterman 4129bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4130218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4131218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4132218ca724SWolfgang Denk 4133bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4134bb99ad6dSBen Warren I2C address of the SPD EEPROM 4135bb99ad6dSBen Warren 41366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4137218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4138218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4139218ca724SWolfgang Denk to something your driver can deal with. 4140bb99ad6dSBen Warren 41411b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 41421b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 41431b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 41441b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 41451b3e3c4fSYork Sun header files or board specific files. 41461b3e3c4fSYork Sun 41476f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 41486f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 41496f5e1dc5SYork Sun 41506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4151218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4152218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 41532ad6b513STimur Tabi 4154c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4155c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4156c26e454dSwdenk 4157c26e454dSwdenk- CONFIG_FEC[12]_PHY 4158c26e454dSwdenk Define to the hardcoded PHY address which corresponds 41596e592385Swdenk to the given FEC; i. e. 4160c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4161c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4162c26e454dSwdenk 4163c26e454dSwdenk When set to -1, means to probe for first available. 4164c26e454dSwdenk 4165c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4166c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4167c26e454dSwdenk (so program the FEC to ignore it). 4168c26e454dSwdenk 4169c26e454dSwdenk- CONFIG_RMII 4170c26e454dSwdenk Enable RMII mode for all FECs. 4171c26e454dSwdenk Note that this is a global option, we can't 4172c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4173c26e454dSwdenk 41745cf91d6bSwdenk- CONFIG_CRC32_VERIFY 41755cf91d6bSwdenk Add a verify option to the crc32 command. 41765cf91d6bSwdenk The syntax is: 41775cf91d6bSwdenk 41785cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 41795cf91d6bSwdenk 41805cf91d6bSwdenk Where address/count indicate a memory area 41815cf91d6bSwdenk and crc32 is the correct crc32 which the 41825cf91d6bSwdenk area should have. 41835cf91d6bSwdenk 418456523f12Swdenk- CONFIG_LOOPW 418556523f12Swdenk Add the "loopw" memory command. This only takes effect if 4186602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 418756523f12Swdenk 41887b466641Sstroese- CONFIG_MX_CYCLIC 41897b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 41907b466641Sstroese "md/mw" commands. 41917b466641Sstroese Examples: 41927b466641Sstroese 41937b466641Sstroese => mdc.b 10 4 500 41947b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 41957b466641Sstroese 41967b466641Sstroese => mwc.l 100 12345678 10 41977b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 41987b466641Sstroese 41997b466641Sstroese This only takes effect if the memory commands are activated 4200602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 42017b466641Sstroese 42028aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4203afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4204e03f3169SWolfgang Denk low level initializations (like setting up the memory 4205e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4206e03f3169SWolfgang Denk relocate itself into RAM. 42078aa1a2d1Swdenk 4208e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4209e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4210e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4211e03f3169SWolfgang Denk these initializations itself. 42128aa1a2d1Swdenk 4213401bb30bSAneesh V- CONFIG_SPL_BUILD 4214df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4215df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4216df81238bSMagnus Lilja compiling a NAND SPL. 4217400558b5Swdenk 4218*3aa29de0SYing Zhang- CONFIG_TPL_BUILD 4219*3aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 4220*3aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 4221*3aa29de0SYing Zhang It is loaded by the SPL. 4222*3aa29de0SYing Zhang 42235df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 42245df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 42255df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 42265df572f0SYing Zhang previous 4k of the .text section. 42275df572f0SYing Zhang 42284213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 42294213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 42304213fc29SSimon Glass effective address. It is therefore not necessary to regard 42314213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 42324213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 42334213fc29SSimon Glass it maintains its own little RAM buffer which contains all 42344213fc29SSimon Glass addressable memory. This option causes some memory accesses 42354213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 42364213fc29SSimon Glass 4237d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4238d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4239d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4240d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4241d8834a13SMatthias Weisser conditions but may increase the binary size. 4242d8834a13SMatthias Weisser 4243588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4244588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4245588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4246b16f521aSGabe Black 4247fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4248fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4249fc33705eSMark Jackson 4250fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 42515b5ece9eSGabe Black 4252f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4253f2717b47STimur Tabi----------------------------------- 4254f2717b47STimur Tabi 4255f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4256f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4257f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4258f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4259f2717b47STimur Tabiwithin that device. 4260f2717b47STimur Tabi 4261f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 4262f2717b47STimur Tabi The address in the storage device where the firmware is located. The 4263f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4264f2717b47STimur Tabi is also specified. 4265f2717b47STimur Tabi 4266f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4267f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4268f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4269f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4270f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4271f2717b47STimur Tabi 4272f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4273f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4274f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4275f2717b47STimur Tabi virtual address in NOR flash. 4276f2717b47STimur Tabi 4277f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4278f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4279f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4280f2717b47STimur Tabi 4281f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4282f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4283f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4284f2717b47STimur Tabi 4285f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4286f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4287f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4288f2717b47STimur Tabi 4289292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4290292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4291292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4292fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4293fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4294fc54c7faSLiu Gang master's memory space. 4295f2717b47STimur Tabi 4296c609719bSwdenkBuilding the Software: 4297c609719bSwdenk====================== 4298c609719bSwdenk 4299218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4300218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4301218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4302218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4303218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4304218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4305c609719bSwdenk 4306218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4307218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4308218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4309218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4310218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4311c609719bSwdenk 4312218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4313218ca724SWolfgang Denk $ export CROSS_COMPILE 4314c609719bSwdenk 43152f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 43162f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 43172f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 43182f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 43192f8d396bSPeter Tyser 43202f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 43212f8d396bSPeter Tyser 43222f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 43232f8d396bSPeter Tyser be executed on computers running Windows. 43242f8d396bSPeter Tyser 4325c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4326c609719bSwdenksources you must configure U-Boot for one specific board type. This 4327c609719bSwdenkis done by typing: 4328c609719bSwdenk 4329c609719bSwdenk make NAME_config 4330c609719bSwdenk 4331218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 43324d675ae6SMichael Jonesrations; see boards.cfg for supported names. 433354387ac9Swdenk 4334c609719bSwdenkNote: for some board special configuration names may exist; check if 4335c609719bSwdenk additional information is available from the board vendor; for 43362729af9dSwdenk instance, the TQM823L systems are available without (standard) 43372729af9dSwdenk or with LCD support. You can select such additional "features" 433811ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4339c609719bSwdenk 43402729af9dSwdenk make TQM823L_config 43412729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4342c609719bSwdenk 4343c609719bSwdenk make TQM823L_LCD_config 4344c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4345c609719bSwdenk 4346c609719bSwdenk etc. 4347c609719bSwdenk 4348c609719bSwdenk 4349c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 43507152b1d0Swdenkimages ready for download to / installation on your system: 4351c609719bSwdenk 4352c609719bSwdenk- "u-boot.bin" is a raw binary image 4353c609719bSwdenk- "u-boot" is an image in ELF binary format 4354c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4355c609719bSwdenk 4356baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4357baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4358baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4359baf31249SMarian Balakowicz 4360baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4361baf31249SMarian Balakowicz 4362baf31249SMarian Balakowicz make O=/tmp/build distclean 4363baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4364baf31249SMarian Balakowicz make O=/tmp/build all 4365baf31249SMarian Balakowicz 4366baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4367baf31249SMarian Balakowicz 4368baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4369baf31249SMarian Balakowicz make distclean 4370baf31249SMarian Balakowicz make NAME_config 4371baf31249SMarian Balakowicz make all 4372baf31249SMarian Balakowicz 4373baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4374baf31249SMarian Balakowiczvariable. 4375baf31249SMarian Balakowicz 4376c609719bSwdenk 4377c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4378c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4379c609719bSwdenknative "make". 4380c609719bSwdenk 4381c609719bSwdenk 4382c609719bSwdenkIf the system board that you have is not listed, then you will need 4383c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4384c609719bSwdenksteps: 4385c609719bSwdenk 4386c609719bSwdenk1. Add a new configuration option for your board to the toplevel 43874d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 43884d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4389c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 439085ec0bccSwdenk files you need. In your board directory, you will need at least 439185ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 439285ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 439385ec0bccSwdenk your board 4394c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4395c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 439685ec0bccSwdenk4. Run "make <board>_config" with your new name. 4397c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4398c609719bSwdenk to be installed on your target system. 439985ec0bccSwdenk6. Debug and solve any problems that might arise. 4400c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4401c609719bSwdenk 4402c609719bSwdenk 4403c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4404c609719bSwdenk============================================================== 4405c609719bSwdenk 4406c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4407c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4408c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4409c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4410218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4411c609719bSwdenk 4412c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4413c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4414c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4415c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4416c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 44177152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4418218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4419218ca724SWolfgang Denkyou can type 4420c609719bSwdenk 4421c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4422c609719bSwdenk 4423c609719bSwdenkor to build on a native PowerPC system you can type 4424c609719bSwdenk 4425c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4426c609719bSwdenk 4427218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4428218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4429218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4430218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4431218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4432218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4433218ca724SWolfgang Denkvariable. For example: 4434baf31249SMarian Balakowicz 4435baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4436baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4437baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4438baf31249SMarian Balakowicz 4439218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4440218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4441218ca724SWolfgang Denkduring the whole build process. 4442baf31249SMarian Balakowicz 4443baf31249SMarian Balakowicz 4444c609719bSwdenkSee also "U-Boot Porting Guide" below. 4445c609719bSwdenk 4446c609719bSwdenk 4447c609719bSwdenkMonitor Commands - Overview: 4448c609719bSwdenk============================ 4449c609719bSwdenk 4450c609719bSwdenkgo - start application at address 'addr' 4451c609719bSwdenkrun - run commands in an environment variable 4452c609719bSwdenkbootm - boot application image from memory 4453c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 445444f074c7SMarek Vasutbootz - boot zImage from memory 4455c609719bSwdenktftpboot- boot image via network using TFTP protocol 4456c609719bSwdenk and env variables "ipaddr" and "serverip" 4457c609719bSwdenk (and eventually "gatewayip") 44581fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4459c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4460c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4461c609719bSwdenkloads - load S-Record file over serial line 4462c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4463c609719bSwdenkmd - memory display 4464c609719bSwdenkmm - memory modify (auto-incrementing) 4465c609719bSwdenknm - memory modify (constant address) 4466c609719bSwdenkmw - memory write (fill) 4467c609719bSwdenkcp - memory copy 4468c609719bSwdenkcmp - memory compare 4469c609719bSwdenkcrc32 - checksum calculation 44700f89c54bSPeter Tyseri2c - I2C sub-system 4471c609719bSwdenksspi - SPI utility commands 4472c609719bSwdenkbase - print or set address offset 4473c609719bSwdenkprintenv- print environment variables 4474c609719bSwdenksetenv - set environment variables 4475c609719bSwdenksaveenv - save environment variables to persistent storage 4476c609719bSwdenkprotect - enable or disable FLASH write protection 4477c609719bSwdenkerase - erase FLASH memory 4478c609719bSwdenkflinfo - print FLASH memory information 447910635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4480c609719bSwdenkbdinfo - print Board Info structure 4481c609719bSwdenkiminfo - print header information for application image 4482c609719bSwdenkconinfo - print console devices and informations 4483c609719bSwdenkide - IDE sub-system 4484c609719bSwdenkloop - infinite loop on address range 448556523f12Swdenkloopw - infinite write loop on address range 4486c609719bSwdenkmtest - simple RAM test 4487c609719bSwdenkicache - enable or disable instruction cache 4488c609719bSwdenkdcache - enable or disable data cache 4489c609719bSwdenkreset - Perform RESET of the CPU 4490c609719bSwdenkecho - echo args to console 4491c609719bSwdenkversion - print monitor version 4492c609719bSwdenkhelp - print online help 4493c609719bSwdenk? - alias for 'help' 4494c609719bSwdenk 4495c609719bSwdenk 4496c609719bSwdenkMonitor Commands - Detailed Description: 4497c609719bSwdenk======================================== 4498c609719bSwdenk 4499c609719bSwdenkTODO. 4500c609719bSwdenk 4501c609719bSwdenkFor now: just type "help <command>". 4502c609719bSwdenk 4503c609719bSwdenk 4504c609719bSwdenkEnvironment Variables: 4505c609719bSwdenk====================== 4506c609719bSwdenk 4507c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4508c609719bSwdenkcan be made persistent by saving to Flash memory. 4509c609719bSwdenk 4510c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4511c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4512c609719bSwdenkwithout a value can be used to delete a variable from the 4513c609719bSwdenkenvironment. As long as you don't save the environment you are 4514c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4515c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4516c609719bSwdenk 4517c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4518c96f86eeSWolfgang Denk 4519c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4520c609719bSwdenk 4521c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4522c609719bSwdenk 4523c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4524c609719bSwdenk 4525c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4526c609719bSwdenk 4527c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4528c609719bSwdenk 4529c609719bSwdenk bootfile - Name of the image to load with TFTP 4530c609719bSwdenk 45317d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 45327d721e34SBartlomiej Sieka command can be restricted. This variable is given as 45337d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 45347d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 45357d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 45367d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4537c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4538c3624e6eSGrant Likely bootm_mapsize. 4539c3624e6eSGrant Likely 4540c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4541c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4542c3624e6eSGrant Likely defines the size of the memory region starting at base 4543c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4544c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4545c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4546c3624e6eSGrant Likely used otherwise. 45477d721e34SBartlomiej Sieka 45487d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 45497d721e34SBartlomiej Sieka command can be restricted. This variable is given as 45507d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 45517d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 45527d721e34SBartlomiej Sieka environment variable. 45537d721e34SBartlomiej Sieka 45544bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 45554bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 45564bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 45574bae9090SBartlomiej Sieka 4558c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4559c609719bSwdenk "bootp" will just load perform a lookup of the 4560c609719bSwdenk configuration from the BOOTP server, but not try to 4561c609719bSwdenk load any image using TFTP 4562c609719bSwdenk 4563c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4564c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4565c609719bSwdenk be automatically started (by internally calling 4566c609719bSwdenk "bootm") 4567c609719bSwdenk 45684a6fd34bSwdenk If set to "no", a standalone image passed to the 45694a6fd34bSwdenk "bootm" command will be copied to the load address 45704a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 45714a6fd34bSwdenk This can be used to load and uncompress arbitrary 45724a6fd34bSwdenk data. 45734a6fd34bSwdenk 4574a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4575a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4576fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4577fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4578fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4579fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4580fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4581fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4582fa34f6b2SShawn Guo access it during the boot procedure. 4583fa34f6b2SShawn Guo 4584a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4585a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4586a28afca5SDavid A. Long to work it must reside in writable memory, have 4587a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4588a28afca5SDavid A. Long add the information it needs into it, and the memory 4589a28afca5SDavid A. Long must be accessible by the kernel. 4590a28afca5SDavid A. Long 4591eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4592eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4593eea63e05SSimon Glass defined. 4594eea63e05SSimon Glass 459517ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 459617ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 459717ea1177Swdenk mode (400kHZ). This environment variable is used in 459817ea1177Swdenk initialization code. So, for changes to be effective 459917ea1177Swdenk it must be saved and board must be reset. 460017ea1177Swdenk 4601c609719bSwdenk initrd_high - restrict positioning of initrd images: 4602c609719bSwdenk If this variable is not set, initrd images will be 4603c609719bSwdenk copied to the highest possible address in RAM; this 4604c609719bSwdenk is usually what you want since it allows for 4605c609719bSwdenk maximum initrd size. If for some reason you want to 4606c609719bSwdenk make sure that the initrd image is loaded below the 46076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4608c609719bSwdenk variable to a value of "no" or "off" or "0". 4609c609719bSwdenk Alternatively, you can set it to a maximum upper 4610c609719bSwdenk address to use (U-Boot will still check that it 4611c609719bSwdenk does not overwrite the U-Boot stack and data). 4612c609719bSwdenk 4613c609719bSwdenk For instance, when you have a system with 16 MB 46147152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4615c609719bSwdenk you can do this by adding "mem=12M" to the value of 4616c609719bSwdenk the "bootargs" variable. However, now you must make 46177152b1d0Swdenk sure that the initrd image is placed in the first 4618c609719bSwdenk 12 MB as well - this can be done with 4619c609719bSwdenk 4620c609719bSwdenk setenv initrd_high 00c00000 4621c609719bSwdenk 462238b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 462338b99261Swdenk indication to U-Boot that all addresses are legal 462438b99261Swdenk for the Linux kernel, including addresses in flash 462538b99261Swdenk memory. In this case U-Boot will NOT COPY the 462638b99261Swdenk ramdisk at all. This may be useful to reduce the 462738b99261Swdenk boot time on your system, but requires that this 462838b99261Swdenk feature is supported by your Linux kernel. 462938b99261Swdenk 4630c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4631c609719bSwdenk 4632c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4633dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4634c609719bSwdenk 4635c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4636c609719bSwdenk 4637c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4638c609719bSwdenk 4639c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4640c609719bSwdenk 4641c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4642c609719bSwdenk 4643c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4644c609719bSwdenk 4645e2a53458SMike Frysinger ethprime - controls which interface is used first. 4646a3d991bdSwdenk 4647e2a53458SMike Frysinger ethact - controls which interface is currently active. 4648e2a53458SMike Frysinger For example you can do the following 4649a3d991bdSwdenk 465048690d80SHeiko Schocher => setenv ethact FEC 465148690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 465248690d80SHeiko Schocher => setenv ethact SCC 465348690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4654a3d991bdSwdenk 4655e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4656e1692577SMatthias Fuchs available network interfaces. 4657e1692577SMatthias Fuchs It just stays at the currently selected interface. 4658e1692577SMatthias Fuchs 4659a3d991bdSwdenk netretry - When set to "no" each network operation will 4660a3d991bdSwdenk either succeed or fail without retrying. 46616e592385Swdenk When set to "once" the network operation will 46626e592385Swdenk fail when all the available network interfaces 46636e592385Swdenk are tried once without success. 4664a3d991bdSwdenk Useful on scripts which control the retry operation 4665a3d991bdSwdenk themselves. 4666a3d991bdSwdenk 4667b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4668a1cf027aSJean-Christophe PLAGNIOL-VILLARD 46698d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 46708d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 46718d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 46728d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 46738d51aacdSSimon Glass is silent. 46748d51aacdSSimon Glass 467528cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4676ecb0ccd9SWolfgang Denk UDP source port. 4677ecb0ccd9SWolfgang Denk 467828cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 467928cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 468028cb9375SWolfgang Denk 4681c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4682c96f86eeSWolfgang Denk we use the TFTP server's default block size 4683c96f86eeSWolfgang Denk 4684c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4685c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4686c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4687c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4688c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4689c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4690c96f86eeSWolfgang Denk with unreliable TFTP servers. 4691c96f86eeSWolfgang Denk 4692a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 469311ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4694a3d991bdSwdenk VLAN tagged frames. 4695c609719bSwdenk 4696dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4697dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4698dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4699dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4700dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4701dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4702dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4703dc0b7b0eSJason Hobbs 4704dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4705dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4706dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4707dc0b7b0eSJason Hobbs 4708dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4709dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4710dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4711dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4712dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4713dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4714dc0b7b0eSJason Hobbs 4715c609719bSwdenkThe following environment variables may be used and automatically 4716c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4717c609719bSwdenkdepending the information provided by your boot server: 4718c609719bSwdenk 4719c609719bSwdenk bootfile - see above 4720c609719bSwdenk dnsip - IP address of your Domain Name Server 4721fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4722c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4723c609719bSwdenk hostname - Target hostname 4724c609719bSwdenk ipaddr - see above 4725c609719bSwdenk netmask - Subnet Mask 4726c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4727c609719bSwdenk serverip - see above 4728c609719bSwdenk 4729c609719bSwdenk 4730c609719bSwdenkThere are two special Environment Variables: 4731c609719bSwdenk 4732c609719bSwdenk serial# - contains hardware identification information such 4733c609719bSwdenk as type string and/or serial number 4734c609719bSwdenk ethaddr - Ethernet address 4735c609719bSwdenk 4736c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4737c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4738c609719bSwdenkonce they have been set once. 4739c609719bSwdenk 4740c609719bSwdenk 4741c1551ea8SstroeseFurther special Environment Variables: 4742c1551ea8Sstroese 4743c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4744c1551ea8Sstroese with the "version" command. This variable is 4745c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4746c1551ea8Sstroese 4747c1551ea8Sstroese 4748c609719bSwdenkPlease note that changes to some configuration parameters may take 4749c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4750c609719bSwdenk 4751c609719bSwdenk 4752170ab110SJoe HershbergerCallback functions for environment variables: 4753170ab110SJoe Hershberger--------------------------------------------- 4754170ab110SJoe Hershberger 4755170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4756170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 4757170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4758170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4759170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4760170ab110SJoe Hershberger 4761170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4762170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 4763170ab110SJoe Hershberger 4764170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 4765170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 4766170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 4767170ab110SJoe Hershbergerassociations. The list must be in the following format: 4768170ab110SJoe Hershberger 4769170ab110SJoe Hershberger entry = variable_name[:callback_name] 4770170ab110SJoe Hershberger list = entry[,list] 4771170ab110SJoe Hershberger 4772170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 4773170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 4774170ab110SJoe Hershberger 4775170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 4776170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 4777170ab110SJoe Hershbergeroverride any association in the static list. You can define 4778170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 4779170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 4780170ab110SJoe Hershberger 4781170ab110SJoe Hershberger 4782f07771ccSwdenkCommand Line Parsing: 4783f07771ccSwdenk===================== 4784f07771ccSwdenk 4785f07771ccSwdenkThere are two different command line parsers available with U-Boot: 47867152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4787f07771ccSwdenk 4788f07771ccSwdenkOld, simple command line parser: 4789f07771ccSwdenk-------------------------------- 4790f07771ccSwdenk 4791f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4792f07771ccSwdenk- several commands on one line, separated by ';' 4793fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4794f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4795f07771ccSwdenk for example: 4796fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4797f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4798f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4799f07771ccSwdenk 4800f07771ccSwdenkHush shell: 4801f07771ccSwdenk----------- 4802f07771ccSwdenk 4803f07771ccSwdenk- similar to Bourne shell, with control structures like 4804f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4805f07771ccSwdenk until...do...done, ... 4806f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4807f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4808f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4809f07771ccSwdenk command 4810f07771ccSwdenk 4811f07771ccSwdenkGeneral rules: 4812f07771ccSwdenk-------------- 4813f07771ccSwdenk 4814f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4815f07771ccSwdenk command) contains several commands separated by semicolon, and 4816f07771ccSwdenk one of these commands fails, then the remaining commands will be 4817f07771ccSwdenk executed anyway. 4818f07771ccSwdenk 4819f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 482011ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4821f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4822f07771ccSwdenk variables are not executed. 4823f07771ccSwdenk 4824c609719bSwdenkNote for Redundant Ethernet Interfaces: 4825c609719bSwdenk======================================= 4826c609719bSwdenk 482711ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4828c609719bSwdenksuch configurations and is capable of automatic selection of a 48297152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4830c609719bSwdenk 4831c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4832c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4833c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4834c609719bSwdenk 4835c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4836c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4837c609719bSwdenkding setting in the environment; if the corresponding environment 4838c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4839c609719bSwdenk 4840c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4841c609719bSwdenk environment, the SROM's address is used. 4842c609719bSwdenk 4843c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4844c609719bSwdenk environment exists, then the value from the environment variable is 4845c609719bSwdenk used. 4846c609719bSwdenk 4847c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4848c609719bSwdenk both addresses are the same, this MAC address is used. 4849c609719bSwdenk 4850c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4851c609719bSwdenk addresses differ, the value from the environment is used and a 4852c609719bSwdenk warning is printed. 4853c609719bSwdenk 4854c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4855c609719bSwdenk is raised. 4856c609719bSwdenk 4857ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4858ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4859ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4860ecee9324SBen WarrenThe naming convention is as follows: 4861ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4862c609719bSwdenk 4863c609719bSwdenkImage Formats: 4864c609719bSwdenk============== 4865c609719bSwdenk 48663310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 48673310c549SMarian Balakowiczimages in two formats: 48683310c549SMarian Balakowicz 48693310c549SMarian BalakowiczNew uImage format (FIT) 48703310c549SMarian Balakowicz----------------------- 48713310c549SMarian Balakowicz 48723310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 48733310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 48743310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 48753310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 48763310c549SMarian Balakowicz 48773310c549SMarian Balakowicz 48783310c549SMarian BalakowiczOld uImage format 48793310c549SMarian Balakowicz----------------- 48803310c549SMarian Balakowicz 48813310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 48823310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 48833310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4884c609719bSwdenk 4885c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4886c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4887f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4888f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4889f5ed9e39SPeter Tyser INTEGRITY). 48907b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4891afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4892afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4893c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4894c609719bSwdenk* Load Address 4895c609719bSwdenk* Entry Point 4896c609719bSwdenk* Image Name 4897c609719bSwdenk* Image Timestamp 4898c609719bSwdenk 4899c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4900c609719bSwdenkand the data portions of the image are secured against corruption by 4901c609719bSwdenkCRC32 checksums. 4902c609719bSwdenk 4903c609719bSwdenk 4904c609719bSwdenkLinux Support: 4905c609719bSwdenk============== 4906c609719bSwdenk 4907c609719bSwdenkAlthough U-Boot should support any OS or standalone application 49087152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4909c609719bSwdenkU-Boot. 4910c609719bSwdenk 4911c609719bSwdenkU-Boot includes many features that so far have been part of some 4912c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4913c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4914c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 49157152b1d0Swdenkserves several purposes: 4916c609719bSwdenk 4917c609719bSwdenk- the same features can be used for other OS or standalone 4918c609719bSwdenk applications (for instance: using compressed images to reduce the 4919c609719bSwdenk Flash memory footprint) 4920c609719bSwdenk 4921c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 49227152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4923c609719bSwdenk 4924c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4925c609719bSwdenk images; of course this also means that different kernel images can 4926c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4927c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4928c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4929c609719bSwdenk software is easier now. 4930c609719bSwdenk 4931c609719bSwdenk 4932c609719bSwdenkLinux HOWTO: 4933c609719bSwdenk============ 4934c609719bSwdenk 4935c609719bSwdenkPorting Linux to U-Boot based systems: 4936c609719bSwdenk--------------------------------------- 4937c609719bSwdenk 4938c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4939c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4940c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4941c609719bSwdenkLinux :-). 4942c609719bSwdenk 4943a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4944c609719bSwdenk 4945c609719bSwdenkJust make sure your machine specific header file (for instance 4946c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 49471dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 49481dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 49496d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4950c609719bSwdenk 4951c609719bSwdenk 4952c609719bSwdenkConfiguring the Linux kernel: 4953c609719bSwdenk----------------------------- 4954c609719bSwdenk 4955c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4956c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4957c609719bSwdenk 4958c609719bSwdenk 4959c609719bSwdenkBuilding a Linux Image: 4960c609719bSwdenk----------------------- 4961c609719bSwdenk 496224ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 496324ee89b9Swdenknot used. If you use recent kernel source, a new build target 496424ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 496524ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 496624ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 496724ee89b9Swdenk100% compatible format. 4968c609719bSwdenk 4969c609719bSwdenkExample: 4970c609719bSwdenk 4971c609719bSwdenk make TQM850L_config 4972c609719bSwdenk make oldconfig 4973c609719bSwdenk make dep 497424ee89b9Swdenk make uImage 4975c609719bSwdenk 497624ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 497724ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 497824ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4979c609719bSwdenk 498024ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 498124ee89b9Swdenk 498224ee89b9Swdenk* convert the kernel into a raw binary image: 498324ee89b9Swdenk 498424ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 498524ee89b9Swdenk -R .note -R .comment \ 498624ee89b9Swdenk -S vmlinux linux.bin 498724ee89b9Swdenk 498824ee89b9Swdenk* compress the binary image: 498924ee89b9Swdenk 499024ee89b9Swdenk gzip -9 linux.bin 499124ee89b9Swdenk 499224ee89b9Swdenk* package compressed binary image for U-Boot: 499324ee89b9Swdenk 499424ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 499524ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 499624ee89b9Swdenk -d linux.bin.gz uImage 499724ee89b9Swdenk 499824ee89b9Swdenk 499924ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 500024ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 500124ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 500224ee89b9Swdenkbyte header containing information about target architecture, 500324ee89b9Swdenkoperating system, image type, compression method, entry points, time 500424ee89b9Swdenkstamp, CRC32 checksums, etc. 500524ee89b9Swdenk 500624ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 500724ee89b9Swdenkprint the header information, or to build new images. 5008c609719bSwdenk 5009c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5010c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5011c609719bSwdenkchecksum verification: 5012c609719bSwdenk 5013c609719bSwdenk tools/mkimage -l image 5014c609719bSwdenk -l ==> list image header information 5015c609719bSwdenk 5016c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5017c609719bSwdenkfrom a "data file" which is used as image payload: 5018c609719bSwdenk 5019c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5020c609719bSwdenk -n name -d data_file image 5021c609719bSwdenk -A ==> set architecture to 'arch' 5022c609719bSwdenk -O ==> set operating system to 'os' 5023c609719bSwdenk -T ==> set image type to 'type' 5024c609719bSwdenk -C ==> set compression type 'comp' 5025c609719bSwdenk -a ==> set load address to 'addr' (hex) 5026c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5027c609719bSwdenk -n ==> set image name to 'name' 5028c609719bSwdenk -d ==> use image data from 'datafile' 5029c609719bSwdenk 503069459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 503169459791Swdenkaddress (0x00000000), but the entry point address depends on the 503269459791Swdenkkernel version: 5033c609719bSwdenk 5034c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 503524ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5036c609719bSwdenk 5037c609719bSwdenkSo a typical call to build a U-Boot image would read: 5038c609719bSwdenk 503924ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 504024ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5041a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 504224ee89b9Swdenk > examples/uImage.TQM850L 504324ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5044c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5045c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5046c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5047c609719bSwdenk Load Address: 0x00000000 504824ee89b9Swdenk Entry Point: 0x00000000 5049c609719bSwdenk 5050c609719bSwdenkTo verify the contents of the image (or check for corruption): 5051c609719bSwdenk 505224ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 505324ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5054c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5055c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5056c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5057c609719bSwdenk Load Address: 0x00000000 505824ee89b9Swdenk Entry Point: 0x00000000 5059c609719bSwdenk 5060c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5061c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5062c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5063c609719bSwdenkneed to be uncompressed: 5064c609719bSwdenk 5065a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 506624ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 506724ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5068a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 506924ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 507024ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5071c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5072c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5073c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5074c609719bSwdenk Load Address: 0x00000000 507524ee89b9Swdenk Entry Point: 0x00000000 5076c609719bSwdenk 5077c609719bSwdenk 5078c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5079c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5080c609719bSwdenk 5081c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5082c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5083c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5084c609719bSwdenk Image Name: Simple Ramdisk Image 5085c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5086c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5087c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5088c609719bSwdenk Load Address: 0x00000000 5089c609719bSwdenk Entry Point: 0x00000000 5090c609719bSwdenk 5091c609719bSwdenk 5092c609719bSwdenkInstalling a Linux Image: 5093c609719bSwdenk------------------------- 5094c609719bSwdenk 5095c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5096c609719bSwdenkyou must convert the image to S-Record format: 5097c609719bSwdenk 5098c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5099c609719bSwdenk 5100c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5101c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5102c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5103c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5104c609719bSwdenkcommand. 5105c609719bSwdenk 5106c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5107c609719bSwdenkTQM8xxL is in the first Flash bank): 5108c609719bSwdenk 5109c609719bSwdenk => erase 40100000 401FFFFF 5110c609719bSwdenk 5111c609719bSwdenk .......... done 5112c609719bSwdenk Erased 8 sectors 5113c609719bSwdenk 5114c609719bSwdenk => loads 40100000 5115c609719bSwdenk ## Ready for S-Record download ... 5116c609719bSwdenk ~>examples/image.srec 5117c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5118c609719bSwdenk ... 5119c609719bSwdenk 15989 15990 15991 15992 5120c609719bSwdenk [file transfer complete] 5121c609719bSwdenk [connected] 5122c609719bSwdenk ## Start Addr = 0x00000000 5123c609719bSwdenk 5124c609719bSwdenk 5125c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5126c609719bSwdenkthis includes a checksum verification so you can be sure no data 5127c609719bSwdenkcorruption happened: 5128c609719bSwdenk 5129c609719bSwdenk => imi 40100000 5130c609719bSwdenk 5131c609719bSwdenk ## Checking Image at 40100000 ... 5132c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5133c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5134c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5135c609719bSwdenk Load Address: 00000000 5136c609719bSwdenk Entry Point: 0000000c 5137c609719bSwdenk Verifying Checksum ... OK 5138c609719bSwdenk 5139c609719bSwdenk 5140c609719bSwdenkBoot Linux: 5141c609719bSwdenk----------- 5142c609719bSwdenk 5143c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5144c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5145c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5146c609719bSwdenkparameters. You can check and modify this variable using the 5147c609719bSwdenk"printenv" and "setenv" commands: 5148c609719bSwdenk 5149c609719bSwdenk 5150c609719bSwdenk => printenv bootargs 5151c609719bSwdenk bootargs=root=/dev/ram 5152c609719bSwdenk 5153c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5154c609719bSwdenk 5155c609719bSwdenk => printenv bootargs 5156c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5157c609719bSwdenk 5158c609719bSwdenk => bootm 40020000 5159c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5160c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5161c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5162c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5163c609719bSwdenk Load Address: 00000000 5164c609719bSwdenk Entry Point: 0000000c 5165c609719bSwdenk Verifying Checksum ... OK 5166c609719bSwdenk Uncompressing Kernel Image ... OK 5167c609719bSwdenk 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 5168c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5169c609719bSwdenk time_init: decrementer frequency = 187500000/60 5170c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5171c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5172c609719bSwdenk ... 5173c609719bSwdenk 517411ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 51757152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5176c609719bSwdenkformat!) to the "bootm" command: 5177c609719bSwdenk 5178c609719bSwdenk => imi 40100000 40200000 5179c609719bSwdenk 5180c609719bSwdenk ## Checking Image at 40100000 ... 5181c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5182c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5183c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5184c609719bSwdenk Load Address: 00000000 5185c609719bSwdenk Entry Point: 0000000c 5186c609719bSwdenk Verifying Checksum ... OK 5187c609719bSwdenk 5188c609719bSwdenk ## Checking Image at 40200000 ... 5189c609719bSwdenk Image Name: Simple Ramdisk Image 5190c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5191c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5192c609719bSwdenk Load Address: 00000000 5193c609719bSwdenk Entry Point: 00000000 5194c609719bSwdenk Verifying Checksum ... OK 5195c609719bSwdenk 5196c609719bSwdenk => bootm 40100000 40200000 5197c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5198c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5199c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5200c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5201c609719bSwdenk Load Address: 00000000 5202c609719bSwdenk Entry Point: 0000000c 5203c609719bSwdenk Verifying Checksum ... OK 5204c609719bSwdenk Uncompressing Kernel Image ... OK 5205c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5206c609719bSwdenk Image Name: Simple Ramdisk Image 5207c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5208c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5209c609719bSwdenk Load Address: 00000000 5210c609719bSwdenk Entry Point: 00000000 5211c609719bSwdenk Verifying Checksum ... OK 5212c609719bSwdenk Loading Ramdisk ... OK 5213c609719bSwdenk 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 5214c609719bSwdenk Boot arguments: root=/dev/ram 5215c609719bSwdenk time_init: decrementer frequency = 187500000/60 5216c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5217c609719bSwdenk ... 5218c609719bSwdenk RAMDISK: Compressed image found at block 0 5219c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5220c609719bSwdenk 5221c609719bSwdenk bash# 5222c609719bSwdenk 52230267768eSMatthew McClintockBoot Linux and pass a flat device tree: 52240267768eSMatthew McClintock----------- 52250267768eSMatthew McClintock 52260267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 52270267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 52280267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 52290267768eSMatthew McClintockflat device tree: 52300267768eSMatthew McClintock 52310267768eSMatthew McClintock=> print oftaddr 52320267768eSMatthew McClintockoftaddr=0x300000 52330267768eSMatthew McClintock=> print oft 52340267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 52350267768eSMatthew McClintock=> tftp $oftaddr $oft 52360267768eSMatthew McClintockSpeed: 1000, full duplex 52370267768eSMatthew McClintockUsing TSEC0 device 52380267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 52390267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 52400267768eSMatthew McClintockLoad address: 0x300000 52410267768eSMatthew McClintockLoading: # 52420267768eSMatthew McClintockdone 52430267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 52440267768eSMatthew McClintock=> tftp $loadaddr $bootfile 52450267768eSMatthew McClintockSpeed: 1000, full duplex 52460267768eSMatthew McClintockUsing TSEC0 device 52470267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 52480267768eSMatthew McClintockFilename 'uImage'. 52490267768eSMatthew McClintockLoad address: 0x200000 52500267768eSMatthew McClintockLoading:############ 52510267768eSMatthew McClintockdone 52520267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 52530267768eSMatthew McClintock=> print loadaddr 52540267768eSMatthew McClintockloadaddr=200000 52550267768eSMatthew McClintock=> print oftaddr 52560267768eSMatthew McClintockoftaddr=0x300000 52570267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 52580267768eSMatthew McClintock## Booting image at 00200000 ... 52590267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 52600267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 52610267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 52620267768eSMatthew McClintock Load Address: 00000000 52630267768eSMatthew McClintock Entry Point: 00000000 52640267768eSMatthew McClintock Verifying Checksum ... OK 52650267768eSMatthew McClintock Uncompressing Kernel Image ... OK 52660267768eSMatthew McClintockBooting using flat device tree at 0x300000 52670267768eSMatthew McClintockUsing MPC85xx ADS machine description 52680267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 52690267768eSMatthew McClintock[snip] 52700267768eSMatthew McClintock 52710267768eSMatthew McClintock 52726069ff26SwdenkMore About U-Boot Image Types: 52736069ff26Swdenk------------------------------ 52746069ff26Swdenk 52756069ff26SwdenkU-Boot supports the following image types: 52766069ff26Swdenk 52776069ff26Swdenk "Standalone Programs" are directly runnable in the environment 52786069ff26Swdenk provided by U-Boot; it is expected that (if they behave 52796069ff26Swdenk well) you can continue to work in U-Boot after return from 52806069ff26Swdenk the Standalone Program. 52816069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 52826069ff26Swdenk will take over control completely. Usually these programs 52836069ff26Swdenk will install their own set of exception handlers, device 52846069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 52856069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 52866069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 52876069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 52886069ff26Swdenk being started. 52896069ff26Swdenk "Multi-File Images" contain several images, typically an OS 52906069ff26Swdenk (Linux) kernel image and one or more data images like 52916069ff26Swdenk RAMDisks. This construct is useful for instance when you want 52926069ff26Swdenk to boot over the network using BOOTP etc., where the boot 52936069ff26Swdenk server provides just a single image file, but you want to get 52946069ff26Swdenk for instance an OS kernel and a RAMDisk image. 52956069ff26Swdenk 52966069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 52976069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 52986069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 52996069ff26Swdenk Immediately after the terminating 0 follow the images, one by 53006069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 53016069ff26Swdenk a multiple of 4 bytes). 53026069ff26Swdenk 53036069ff26Swdenk "Firmware Images" are binary images containing firmware (like 53046069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 53056069ff26Swdenk flash memory. 53066069ff26Swdenk 53076069ff26Swdenk "Script files" are command sequences that will be executed by 53086069ff26Swdenk U-Boot's command interpreter; this feature is especially 53096069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 53106069ff26Swdenk as command interpreter. 53116069ff26Swdenk 531244f074c7SMarek VasutBooting the Linux zImage: 531344f074c7SMarek Vasut------------------------- 531444f074c7SMarek Vasut 531544f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 531644f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 531744f074c7SMarek Vasutas the syntax of "bootm" command. 531844f074c7SMarek Vasut 53198ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5320017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5321017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5322017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5323017e1f3fSMarek Vasut 5324c609719bSwdenk 5325c609719bSwdenkStandalone HOWTO: 5326c609719bSwdenk================= 5327c609719bSwdenk 5328c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5329c609719bSwdenkrun "standalone" applications, which can use some resources of 5330c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5331c609719bSwdenk 5332c609719bSwdenkTwo simple examples are included with the sources: 5333c609719bSwdenk 5334c609719bSwdenk"Hello World" Demo: 5335c609719bSwdenk------------------- 5336c609719bSwdenk 5337c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5338c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5339c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5340c609719bSwdenklike that: 5341c609719bSwdenk 5342c609719bSwdenk => loads 5343c609719bSwdenk ## Ready for S-Record download ... 5344c609719bSwdenk ~>examples/hello_world.srec 5345c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5346c609719bSwdenk [file transfer complete] 5347c609719bSwdenk [connected] 5348c609719bSwdenk ## Start Addr = 0x00040004 5349c609719bSwdenk 5350c609719bSwdenk => go 40004 Hello World! This is a test. 5351c609719bSwdenk ## Starting application at 0x00040004 ... 5352c609719bSwdenk Hello World 5353c609719bSwdenk argc = 7 5354c609719bSwdenk argv[0] = "40004" 5355c609719bSwdenk argv[1] = "Hello" 5356c609719bSwdenk argv[2] = "World!" 5357c609719bSwdenk argv[3] = "This" 5358c609719bSwdenk argv[4] = "is" 5359c609719bSwdenk argv[5] = "a" 5360c609719bSwdenk argv[6] = "test." 5361c609719bSwdenk argv[7] = "<NULL>" 5362c609719bSwdenk Hit any key to exit ... 5363c609719bSwdenk 5364c609719bSwdenk ## Application terminated, rc = 0x0 5365c609719bSwdenk 5366c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5367c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5368c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5369c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5370c609719bSwdenkcharacter, but this is just a demo program. The application can be 5371c609719bSwdenkcontrolled by the following keys: 5372c609719bSwdenk 5373c609719bSwdenk ? - print current values og the CPM Timer registers 5374c609719bSwdenk b - enable interrupts and start timer 5375c609719bSwdenk e - stop timer and disable interrupts 5376c609719bSwdenk q - quit application 5377c609719bSwdenk 5378c609719bSwdenk => loads 5379c609719bSwdenk ## Ready for S-Record download ... 5380c609719bSwdenk ~>examples/timer.srec 5381c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5382c609719bSwdenk [file transfer complete] 5383c609719bSwdenk [connected] 5384c609719bSwdenk ## Start Addr = 0x00040004 5385c609719bSwdenk 5386c609719bSwdenk => go 40004 5387c609719bSwdenk ## Starting application at 0x00040004 ... 5388c609719bSwdenk TIMERS=0xfff00980 5389c609719bSwdenk Using timer 1 5390c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5391c609719bSwdenk 5392c609719bSwdenkHit 'b': 5393c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5394c609719bSwdenk Enabling timer 5395c609719bSwdenkHit '?': 5396c609719bSwdenk [q, b, e, ?] ........ 5397c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5398c609719bSwdenkHit '?': 5399c609719bSwdenk [q, b, e, ?] . 5400c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5401c609719bSwdenkHit '?': 5402c609719bSwdenk [q, b, e, ?] . 5403c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5404c609719bSwdenkHit '?': 5405c609719bSwdenk [q, b, e, ?] . 5406c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5407c609719bSwdenkHit 'e': 5408c609719bSwdenk [q, b, e, ?] ...Stopping timer 5409c609719bSwdenkHit 'q': 5410c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5411c609719bSwdenk 5412c609719bSwdenk 541385ec0bccSwdenkMinicom warning: 541485ec0bccSwdenk================ 541585ec0bccSwdenk 54167152b1d0SwdenkOver time, many people have reported problems when trying to use the 541785ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 541885ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5419f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 542085ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5421e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5422e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5423e53515a2SKarl O. Pincfor help with kermit. 5424e53515a2SKarl O. Pinc 542585ec0bccSwdenk 542652f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 542752f52c14Swdenkconfiguration to your "File transfer protocols" section: 542852f52c14Swdenk 542952f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 543052f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 543152f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 543252f52c14Swdenk 543352f52c14Swdenk 5434c609719bSwdenkNetBSD Notes: 5435c609719bSwdenk============= 5436c609719bSwdenk 5437c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5438c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5439c609719bSwdenk 5440c609719bSwdenkBuilding requires a cross environment; it is known to work on 5441c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5442c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5443c609719bSwdenkNote that the cross-powerpc package does not install include files; 5444c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5445c609719bSwdenkmissing. This file has to be installed and patched manually: 5446c609719bSwdenk 5447c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5448c609719bSwdenk # mkdir powerpc 5449c609719bSwdenk # ln -s powerpc machine 5450c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5451c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5452c609719bSwdenk 5453c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5454c609719bSwdenkand U-Boot include files. 5455c609719bSwdenk 5456c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5457c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5458c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5459c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 54602a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5461c609719bSwdenk 5462c609719bSwdenk 5463c609719bSwdenkImplementation Internals: 5464c609719bSwdenk========================= 5465c609719bSwdenk 5466c609719bSwdenkThe following is not intended to be a complete description of every 5467c609719bSwdenkimplementation detail. However, it should help to understand the 5468c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5469c609719bSwdenkhardware. 5470c609719bSwdenk 5471c609719bSwdenk 5472c609719bSwdenkInitial Stack, Global Data: 5473c609719bSwdenk--------------------------- 5474c609719bSwdenk 5475c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5476c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5477c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5478c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5479c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5480c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5481c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5482c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5483c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5484c609719bSwdenklocked as (mis-) used as memory, etc. 5485c609719bSwdenk 54867152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 54870668236bSWolfgang Denk U-Boot mailing list: 548843d9616cSwdenk 548943d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 549043d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 549143d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 549243d9616cSwdenk ... 549343d9616cSwdenk 549443d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 549543d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 549643d9616cSwdenk require any physical RAM backing up the cache. The cleverness 549743d9616cSwdenk is that the cache is being used as a temporary supply of 549843d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 549911ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 550043d9616cSwdenk can see how this works by studying the cache architecture and 550143d9616cSwdenk operation in the architecture and processor-specific manuals. 550243d9616cSwdenk 550343d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 550443d9616cSwdenk is another option for the system designer to use as an 550511ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 550643d9616cSwdenk option should work for you. Using CS 4 should be fine if your 550743d9616cSwdenk board designers haven't used it for something that would 550843d9616cSwdenk cause you grief during the initial boot! It is frequently not 550943d9616cSwdenk used. 551043d9616cSwdenk 55116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 551243d9616cSwdenk with your processor/board/system design. The default value 551343d9616cSwdenk you will find in any recent u-boot distribution in 55148a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 551543d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 551643d9616cSwdenk it above 400_0000. Just make sure your board has no resources 551743d9616cSwdenk that are supposed to respond to that address! That code in 551843d9616cSwdenk start.S has been around a while and should work as is when 551943d9616cSwdenk you get the config right. 552043d9616cSwdenk 552143d9616cSwdenk -Chris Hallinan 552243d9616cSwdenk DS4.COM, Inc. 552343d9616cSwdenk 5524c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5525c609719bSwdenkcode for the initialization procedures: 5526c609719bSwdenk 5527c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5528c609719bSwdenk to write it. 5529c609719bSwdenk 553011ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5531c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 55327152b1d0Swdenk zation is performed later (when relocating to RAM). 5533c609719bSwdenk 5534c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5535c609719bSwdenk that. 5536c609719bSwdenk 5537c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5538c609719bSwdenknormal global data to share information beween the code. But it 5539c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5540c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5541c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5542c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5543c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5544c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5545c609719bSwdenkreserve for this purpose. 5546c609719bSwdenk 55477152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5548c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5549c609719bSwdenkGCC's implementation. 5550c609719bSwdenk 5551c609719bSwdenkFor PowerPC, the following registers have specific use: 5552c609719bSwdenk R1: stack pointer 5553e7670f6cSWolfgang Denk R2: reserved for system use 5554c609719bSwdenk R3-R4: parameter passing and return values 5555c609719bSwdenk R5-R10: parameter passing 5556c609719bSwdenk R13: small data area pointer 5557c609719bSwdenk R30: GOT pointer 5558c609719bSwdenk R31: frame pointer 5559c609719bSwdenk 5560e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5561e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5562e6bee808SJoakim Tjernlund going back and forth between asm and C) 5563c609719bSwdenk 5564e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5565c609719bSwdenk 5566c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5567c609719bSwdenk address of the global data structure is known at compile time), 5568c609719bSwdenk but it turned out that reserving a register results in somewhat 5569c609719bSwdenk smaller code - although the code savings are not that big (on 5570c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5571c609719bSwdenk 624 text + 127 data). 5572c609719bSwdenk 5573c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 55744c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 55754c58eb55SMike Frysinger 5576c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 55774c58eb55SMike Frysinger 5578c609719bSwdenkOn ARM, the following registers are used: 5579c609719bSwdenk 5580c609719bSwdenk R0: function argument word/integer result 5581c609719bSwdenk R1-R3: function argument word 5582c609719bSwdenk R9: GOT pointer 5583c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 5584c609719bSwdenk R11: argument (frame) pointer 5585c609719bSwdenk R12: temporary workspace 5586c609719bSwdenk R13: stack pointer 5587c609719bSwdenk R14: link register 5588c609719bSwdenk R15: program counter 5589c609719bSwdenk 5590c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 5591c609719bSwdenk 55920df01fd3SThomas ChouOn Nios II, the ABI is documented here: 55930df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 55940df01fd3SThomas Chou 55950df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 55960df01fd3SThomas Chou 55970df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 55980df01fd3SThomas Chou to access small data sections, so gp is free. 55990df01fd3SThomas Chou 5600afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5601afc1ce82SMacpaul Lin 5602afc1ce82SMacpaul Lin R0-R1: argument/return 5603afc1ce82SMacpaul Lin R2-R5: argument 5604afc1ce82SMacpaul Lin R15: temporary register for assembler 5605afc1ce82SMacpaul Lin R16: trampoline register 5606afc1ce82SMacpaul Lin R28: frame pointer (FP) 5607afc1ce82SMacpaul Lin R29: global pointer (GP) 5608afc1ce82SMacpaul Lin R30: link register (LP) 5609afc1ce82SMacpaul Lin R31: stack pointer (SP) 5610afc1ce82SMacpaul Lin PC: program counter (PC) 5611afc1ce82SMacpaul Lin 5612afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5613afc1ce82SMacpaul Lin 5614d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5615d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5616c609719bSwdenk 5617c609719bSwdenkMemory Management: 5618c609719bSwdenk------------------ 5619c609719bSwdenk 5620c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5621c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5622c609719bSwdenk 5623c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5624c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5625c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5626c609719bSwdenkphysical memory banks. 5627c609719bSwdenk 5628c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5629c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5630c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5631c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 56326d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5633c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5634c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5635c609719bSwdenk 5636c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5637c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5638c609719bSwdenk 5639c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5640c609719bSwdenkthis: 5641c609719bSwdenk 5642c609719bSwdenk 0x0000 0000 Exception Vector code 5643c609719bSwdenk : 5644c609719bSwdenk 0x0000 1FFF 5645c609719bSwdenk 0x0000 2000 Free for Application Use 5646c609719bSwdenk : 5647c609719bSwdenk : 5648c609719bSwdenk 5649c609719bSwdenk : 5650c609719bSwdenk : 5651c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5652c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5653c609719bSwdenk 0x00FC 0000 Malloc Arena 5654c609719bSwdenk : 5655c609719bSwdenk 0x00FD FFFF 5656c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5657c609719bSwdenk ... eventually: LCD or video framebuffer 5658c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5659c609719bSwdenk 0x00FF FFFF [End of RAM] 5660c609719bSwdenk 5661c609719bSwdenk 5662c609719bSwdenkSystem Initialization: 5663c609719bSwdenk---------------------- 5664c609719bSwdenk 5665c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 566611ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5667c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 56687152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5669c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5670c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5671c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5672c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5673c609719bSwdenkthe caches and the SIU. 5674c609719bSwdenk 5675c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5676c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5677c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5678c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5679c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5680c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5681c609719bSwdenkbanks. 5682c609719bSwdenk 5683c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 56847152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5685c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5686c609719bSwdenk0x00000000, with any additional banks following immediately to create 5687c609719bSwdenkcontiguous memory starting from 0. 5688c609719bSwdenk 5689c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5690c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5691c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5692c609719bSwdenkpages, and the final stack is set up. 5693c609719bSwdenk 5694c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5695c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5696c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5697c609719bSwdenknew address in RAM. 5698c609719bSwdenk 5699c609719bSwdenk 5700c609719bSwdenkU-Boot Porting Guide: 5701c609719bSwdenk---------------------- 5702c609719bSwdenk 5703c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 57046aff3115Swdenklist, October 2002] 5705c609719bSwdenk 5706c609719bSwdenk 5707c609719bSwdenkint main(int argc, char *argv[]) 5708c609719bSwdenk{ 5709c609719bSwdenk sighandler_t no_more_time; 5710c609719bSwdenk 5711c609719bSwdenk signal(SIGALRM, no_more_time); 5712c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5713c609719bSwdenk 5714c609719bSwdenk if (available_money > available_manpower) { 57156c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5716c609719bSwdenk return 0; 5717c609719bSwdenk } 5718c609719bSwdenk 5719c609719bSwdenk Download latest U-Boot source; 5720c609719bSwdenk 57210668236bSWolfgang Denk Subscribe to u-boot mailing list; 57226aff3115Swdenk 57236c3fef28SJerry Van Baren if (clueless) 5724c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5725c609719bSwdenk 5726c609719bSwdenk while (learning) { 5727c609719bSwdenk Read the README file in the top level directory; 57287cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 57296c3fef28SJerry Van Baren Read applicable doc/*.README; 5730c609719bSwdenk Read the source, Luke; 57316c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5732c609719bSwdenk } 5733c609719bSwdenk 57346c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 57356c3fef28SJerry Van Baren Buy a BDI3000; 57366c3fef28SJerry Van Baren else 5737c609719bSwdenk Add a lot of aggravation and time; 5738c609719bSwdenk 57396c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 57406c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 57416c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 57426c3fef28SJerry Van Baren } else { 5743c609719bSwdenk Create your own board support subdirectory; 57446c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 57456c3fef28SJerry Van Baren } 57466c3fef28SJerry Van Baren Edit new board/<myboard> files 57476c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5748c609719bSwdenk 57496c3fef28SJerry Van Baren while (!accepted) { 5750c609719bSwdenk while (!running) { 5751c609719bSwdenk do { 5752c609719bSwdenk Add / modify source code; 5753c609719bSwdenk } until (compiles); 5754c609719bSwdenk Debug; 5755c609719bSwdenk if (clueless) 5756c609719bSwdenk email("Hi, I am having problems..."); 5757c609719bSwdenk } 57586c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 57596c3fef28SJerry Van Baren if (reasonable critiques) 57606c3fef28SJerry Van Baren Incorporate improvements from email list code review; 57616c3fef28SJerry Van Baren else 57626c3fef28SJerry Van Baren Defend code as written; 57636c3fef28SJerry Van Baren } 5764c609719bSwdenk 5765c609719bSwdenk return 0; 5766c609719bSwdenk} 5767c609719bSwdenk 5768c609719bSwdenkvoid no_more_time (int sig) 5769c609719bSwdenk{ 5770c609719bSwdenk hire_a_guru(); 5771c609719bSwdenk} 5772c609719bSwdenk 5773c609719bSwdenk 5774c609719bSwdenkCoding Standards: 5775c609719bSwdenk----------------- 5776c609719bSwdenk 5777c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 57782c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 57797ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5780c609719bSwdenk 57812c051651SDetlev ZundelSource files originating from a different project (for example the 57822c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 57832c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 57842c051651SDetlev Zundelsources. 57852c051651SDetlev Zundel 57862c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 57872c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 57882c051651SDetlev Zundelin your code. 5789c609719bSwdenk 5790c178d3daSwdenkPlease also stick to the following formatting rules: 5791180d3f74Swdenk- remove any trailing white space 57927ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5793180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 57947ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5795180d3f74Swdenk- do not add trailing empty lines to source files 5796180d3f74Swdenk 5797c609719bSwdenkSubmissions which do not conform to the standards may be returned 5798c609719bSwdenkwith a request to reformat the changes. 5799c609719bSwdenk 5800c609719bSwdenk 5801c609719bSwdenkSubmitting Patches: 5802c609719bSwdenk------------------- 5803c609719bSwdenk 5804c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5805c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5806c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5807c609719bSwdenk 58080d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5809218ca724SWolfgang Denk 58100668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 58110668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 58120668236bSWolfgang Denk 5813c609719bSwdenkWhen you send a patch, please include the following information with 5814c609719bSwdenkit: 5815c609719bSwdenk 5816c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5817c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5818c609719bSwdenk patch actually fixes something. 5819c609719bSwdenk 5820c609719bSwdenk* For new features: a description of the feature and your 5821c609719bSwdenk implementation. 5822c609719bSwdenk 5823c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5824c609719bSwdenk 5825c609719bSwdenk* For major contributions, your entry to the CREDITS file 5826c609719bSwdenk 5827c609719bSwdenk* When you add support for a new board, don't forget to add this 58287ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5829c609719bSwdenk 5830c609719bSwdenk* If your patch adds new configuration options, don't forget to 5831c609719bSwdenk document these in the README file. 5832c609719bSwdenk 5833218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5834218ca724SWolfgang Denk recommended) you can easily generate the patch using the 58357ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5836218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5837218ca724SWolfgang Denk with some other mail clients. 5838c609719bSwdenk 5839218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5840218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5841218ca724SWolfgang Denk GNU diff. 58426dff5529Swdenk 5843218ca724SWolfgang Denk The current directory when running this command shall be the parent 5844218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5845218ca724SWolfgang Denk your patch includes sufficient directory information for the 5846218ca724SWolfgang Denk affected files). 5847218ca724SWolfgang Denk 5848218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5849218ca724SWolfgang Denk and compressed attachments must not be used. 5850c609719bSwdenk 585152f52c14Swdenk* If one logical set of modifications affects or creates several 585252f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 585352f52c14Swdenk 585452f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 585552f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 585652f52c14Swdenk 585752f52c14Swdenk 5858c609719bSwdenkNotes: 5859c609719bSwdenk 5860c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5861c609719bSwdenk source tree and make sure that no errors or warnings are reported 5862c609719bSwdenk for any of the boards. 5863c609719bSwdenk 5864c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5865c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5866c609719bSwdenk returned with a request to re-formatting / split it. 5867c609719bSwdenk 5868c609719bSwdenk* If you modify existing code, make sure that your new code does not 5869c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5870c609719bSwdenk When adding new features, these should compile conditionally only 5871c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5872c609719bSwdenk disabled must not need more memory than the old code without your 5873c609719bSwdenk modification. 587490dc6704Swdenk 58750668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 58760668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 58770668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 58780668236bSWolfgang Denk bigger than the size limit should be avoided. 5879