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 409*64501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 410*64501c66SPriyanka Jain This value denotes start offset of DDR memory which is 411*64501c66SPriyanka Jain connected exclusively to the DSP cores. 412*64501c66SPriyanka 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 417*64501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 418*64501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 419*64501c66SPriyanka Jain connected to the DSP core. 420*64501c66SPriyanka 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 264419c402afSSimon Glass- Signing support: 264519c402afSSimon Glass CONFIG_RSA 264619c402afSSimon Glass 264719c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 264819c402afSSimon Glass in U-Boot. See doc/uImage/signature for more information. 264919c402afSSimon Glass 265019c402afSSimon Glass The signing part is build into mkimage regardless of this 265119c402afSSimon Glass option. 265219c402afSSimon Glass 265319c402afSSimon Glass 2654a8c7c708Swdenk- Show boot progress: 2655c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2656c609719bSwdenk 2657c609719bSwdenk Defining this option allows to add some board- 2658c609719bSwdenk specific code (calling a user-provided function 2659c609719bSwdenk "show_boot_progress(int)") that enables you to show 2660c609719bSwdenk the system's boot progress on some display (for 2661c609719bSwdenk example, some LED's) on your board. At the moment, 2662c609719bSwdenk the following checkpoints are implemented: 2663c609719bSwdenk 26643a608ca0SSimon Glass- Detailed boot stage timing 26653a608ca0SSimon Glass CONFIG_BOOTSTAGE 26663a608ca0SSimon Glass Define this option to get detailed timing of each stage 26673a608ca0SSimon Glass of the boot process. 26683a608ca0SSimon Glass 26693a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 26703a608ca0SSimon Glass This is the number of available user bootstage records. 26713a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 26723a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 26733a608ca0SSimon Glass the limit, recording will stop. 26743a608ca0SSimon Glass 26753a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 26763a608ca0SSimon Glass Define this to print a report before boot, similar to this: 26773a608ca0SSimon Glass 26783a608ca0SSimon Glass Timer summary in microseconds: 26793a608ca0SSimon Glass Mark Elapsed Stage 26803a608ca0SSimon Glass 0 0 reset 26813a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 26823a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 26833a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 26843a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 26853a608ca0SSimon Glass 3,910,375 250,777 main_loop 26863a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 26873a608ca0SSimon Glass 30,361,327 445,160 start_kernel 26883a608ca0SSimon Glass 26892eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 26902eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 26912eba38cfSSimon Glass and un/stashing of bootstage data. 26922eba38cfSSimon Glass 269394fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 269494fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 269594fd1316SSimon Glass node is created with each bootstage id as a child. Each child 269694fd1316SSimon Glass has a 'name' property and either 'mark' containing the 269794fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 269894fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 269994fd1316SSimon Glass For example: 270094fd1316SSimon Glass 270194fd1316SSimon Glass bootstage { 270294fd1316SSimon Glass 154 { 270394fd1316SSimon Glass name = "board_init_f"; 270494fd1316SSimon Glass mark = <3575678>; 270594fd1316SSimon Glass }; 270694fd1316SSimon Glass 170 { 270794fd1316SSimon Glass name = "lcd"; 270894fd1316SSimon Glass accum = <33482>; 270994fd1316SSimon Glass }; 271094fd1316SSimon Glass }; 271194fd1316SSimon Glass 271294fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 271394fd1316SSimon Glass 27141372cce2SMarian BalakowiczLegacy uImage format: 27151372cce2SMarian Balakowicz 2716c609719bSwdenk Arg Where When 2717c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2718c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2719c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2720c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2721c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2722c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2723c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2724c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2725c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 27261372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2727c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2728c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2729c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2730c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 27311372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2732c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 27331372cce2SMarian Balakowicz 27341372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 27351372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 27361372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 27371372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 27381372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 27391372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 27401372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 274111ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 27421372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 27431372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 27441372cce2SMarian Balakowicz 2745ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2746c609719bSwdenk 2747a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 274863e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 274963e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 275063e73c9aSwdenk 2751566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2752566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2753566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2754566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2755566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2756566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2757566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2758566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2759566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2760566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2761566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2762566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2763566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2764566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2765566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2766566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2767566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2768566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2769566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2770566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2771566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2772566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2773566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2774566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2775566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2776566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2777566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2778566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2779566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2780566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2781566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2782566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2783566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2784566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2785566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2786566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2787566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2788566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2789566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2790566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2791566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2792566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2793566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2794566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2795566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2796566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2797566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2798c609719bSwdenk 2799566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2800c609719bSwdenk 2801566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2802566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2803566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2804206c60cbSwdenk 2805566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2806566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 280711ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2808566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2809566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2810566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 281174de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 281274de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2813566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2814c609719bSwdenk 28151372cce2SMarian BalakowiczFIT uImage format: 28161372cce2SMarian Balakowicz 28171372cce2SMarian Balakowicz Arg Where When 28181372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 28191372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 28201372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 28211372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 28221372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 28231372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2824f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 28251372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 28261372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 28271372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 28281372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 28291372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 283011ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 283111ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 28321372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 28331372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 28341372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 28351372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 28361372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 28371372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 28381372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 28391372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 28401372cce2SMarian Balakowicz 28411372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 28421372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 28431372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 284411ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 28451372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 28461372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 28471372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 28481372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 28491372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 28501372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 28511372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 28521372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 28531372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 28541372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 28551372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 28561372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 28571372cce2SMarian Balakowicz 285811ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 28591372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 28601372cce2SMarian Balakowicz 286111ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 28621372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 28631372cce2SMarian Balakowicz 286411ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 28651372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 28661372cce2SMarian Balakowicz 2867d95f6ec7SGabe Black- FIT image support: 2868d95f6ec7SGabe Black CONFIG_FIT 2869d95f6ec7SGabe Black Enable support for the FIT uImage format. 2870d95f6ec7SGabe Black 2871d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 2872d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 2873d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 2874d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 2875d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 2876d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 2877d95f6ec7SGabe Black 28783e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 28793e569a6bSSimon Glass This option enables signature verification of FIT uImages, 28803e569a6bSSimon Glass using a hash signed and verified using RSA. See 28813e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 28823e569a6bSSimon Glass 28834cf2609bSWolfgang Denk- Standalone program support: 28844cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 28854cf2609bSWolfgang Denk 28866feff899SWolfgang Denk This option defines a board specific value for the 28876feff899SWolfgang Denk address where standalone program gets loaded, thus 28886feff899SWolfgang Denk overwriting the architecture dependent default 28894cf2609bSWolfgang Denk settings. 28904cf2609bSWolfgang Denk 28914cf2609bSWolfgang Denk- Frame Buffer Address: 28924cf2609bSWolfgang Denk CONFIG_FB_ADDR 28934cf2609bSWolfgang Denk 28944cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 289544a53b57SWolfgang Denk address for frame buffer. This is typically the case 289644a53b57SWolfgang Denk when using a graphics controller has separate video 289744a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 289844a53b57SWolfgang Denk the given address instead of dynamically reserving it 289944a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 290044a53b57SWolfgang Denk the memory for the frame buffer depending on the 290144a53b57SWolfgang Denk configured panel size. 29024cf2609bSWolfgang Denk 29034cf2609bSWolfgang Denk Please see board_init_f function. 29044cf2609bSWolfgang Denk 2905cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2906cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2907cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2908cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2909cccfc2abSDetlev Zundel 2910cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2911cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2912cccfc2abSDetlev Zundel 2913cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2914cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2915cccfc2abSDetlev Zundel 2916cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2917cccfc2abSDetlev Zundel Needed for mtdparts command support. 2918cccfc2abSDetlev Zundel 2919cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2920cccfc2abSDetlev Zundel 2921cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2922cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2923cccfc2abSDetlev Zundel 292470c219cdSJoe Hershberger- UBI support 292570c219cdSJoe Hershberger CONFIG_CMD_UBI 292670c219cdSJoe Hershberger 292770c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 292870c219cdSJoe Hershberger with the UBI flash translation layer 292970c219cdSJoe Hershberger 293070c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 293170c219cdSJoe Hershberger 2932147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 2933147162daSJoe Hershberger 2934147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 2935147162daSJoe Hershberger warnings and errors enabled. 2936147162daSJoe Hershberger 293770c219cdSJoe Hershberger- UBIFS support 293870c219cdSJoe Hershberger CONFIG_CMD_UBIFS 293970c219cdSJoe Hershberger 294070c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 294170c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 294270c219cdSJoe Hershberger 294370c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 294470c219cdSJoe Hershberger 2945147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 2946147162daSJoe Hershberger 2947147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 2948147162daSJoe Hershberger warnings and errors enabled. 2949147162daSJoe Hershberger 29506a11cf48SDaniel Schwierzeck- SPL framework 29516a11cf48SDaniel Schwierzeck CONFIG_SPL 29526a11cf48SDaniel Schwierzeck Enable building of SPL globally. 29536a11cf48SDaniel Schwierzeck 295495579793STom Rini CONFIG_SPL_LDSCRIPT 295595579793STom Rini LDSCRIPT for linking the SPL binary. 295695579793STom Rini 29576ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 29586ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 29596ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 29606ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 29618960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 29626ebc3461SAlbert ARIBAUD must not be both defined at the same time. 29636ebc3461SAlbert ARIBAUD 296495579793STom Rini CONFIG_SPL_MAX_SIZE 29656ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 29666ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 29676ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 29686ebc3461SAlbert ARIBAUD not exceed it. 296995579793STom Rini 29706a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 29716a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 29726a11cf48SDaniel Schwierzeck 297394a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 297494a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 297594a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 297694a45bb1SScott Wood 297795579793STom Rini CONFIG_SPL_BSS_START_ADDR 297895579793STom Rini Link address for the BSS within the SPL binary. 297995579793STom Rini 298095579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 29816ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 29826ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 29836ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 29848960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 29856ebc3461SAlbert ARIBAUD must not be both defined at the same time. 298695579793STom Rini 298795579793STom Rini CONFIG_SPL_STACK 298895579793STom Rini Adress of the start of the stack SPL will use 298995579793STom Rini 299094a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 299194a45bb1SScott Wood Adress of the start of the stack SPL will use after 299294a45bb1SScott Wood relocation. If unspecified, this is equal to 299394a45bb1SScott Wood CONFIG_SPL_STACK. 299494a45bb1SScott Wood 299595579793STom Rini CONFIG_SYS_SPL_MALLOC_START 299695579793STom Rini Starting address of the malloc pool used in SPL. 299795579793STom Rini 299895579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 299995579793STom Rini The size of the malloc pool used in SPL. 30006a11cf48SDaniel Schwierzeck 300147f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 300247f7bcaeSTom Rini Enable the SPL framework under common/. This framework 300347f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 300447f7bcaeSTom Rini NAND loading of the Linux Kernel. 300547f7bcaeSTom Rini 3006861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3007861a86f4STom Rini For ARM, enable an optional function to print more information 3008861a86f4STom Rini about the running system. 3009861a86f4STom Rini 30104b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 30114b919725SScott Wood Arch init code should be built for a very small image 30124b919725SScott Wood 30136a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 30146a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 30156a11cf48SDaniel Schwierzeck 30166a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 30176a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 30186a11cf48SDaniel Schwierzeck 30196a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 30206a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 30216a11cf48SDaniel Schwierzeck 30226a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 30236a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 30246a11cf48SDaniel Schwierzeck 30256a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 30266a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 30276a11cf48SDaniel Schwierzeck 302895579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 302995579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 303095579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 303195579793STom Rini Address, size and partition on the MMC to load U-Boot from 303295579793STom Rini when the MMC is being used in raw mode. 303395579793STom Rini 30342b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 30352b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 30362b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 30372b75b0adSPeter Korsgaard 30382b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 30392b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 30402b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 30412b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 30422b75b0adSPeter Korsgaard (for falcon mode) 30432b75b0adSPeter Korsgaard 304495579793STom Rini CONFIG_SPL_FAT_SUPPORT 304595579793STom Rini Support for fs/fat/libfat.o in SPL binary 304695579793STom Rini 304795579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 304895579793STom Rini Filename to read to load U-Boot when reading from FAT 304995579793STom Rini 30507ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 30517ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 30527ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 30537ad2cc79SPeter Korsgaard 30547ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 30557ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 30567ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 30577ad2cc79SPeter Korsgaard 305806f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 305906f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 306006f60ae3SScott Wood start.S waits for the rest of the SPL to load before 306106f60ae3SScott Wood continuing (the hardware starts execution after just 306206f60ae3SScott Wood loading the first page rather than the full 4K). 306306f60ae3SScott Wood 30646f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 30656f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 30666f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 30676f2f01b9SScott Wood 30686f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 30696f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 30706f2f01b9SScott Wood 30716f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 30726f2f01b9SScott Wood Include standard software ECC in the SPL 30736f2f01b9SScott Wood 307495579793STom Rini CONFIG_SPL_NAND_SIMPLE 30757d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 30767d4b7955SScott Wood expose the cmd_ctrl() interface. 307795579793STom Rini 307895579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 307995579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 308095579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 308195579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 308295579793STom Rini CONFIG_SYS_NAND_ECCBYTES 308395579793STom Rini Defines the size and behavior of the NAND that SPL uses 30847d4b7955SScott Wood to read U-Boot 308595579793STom Rini 308695579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 30877d4b7955SScott Wood Location in NAND to read U-Boot from 30887d4b7955SScott Wood 30897d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 30907d4b7955SScott Wood Location in memory to load U-Boot to 30917d4b7955SScott Wood 30927d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 30937d4b7955SScott Wood Size of image to load 309495579793STom Rini 309595579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 30967d4b7955SScott Wood Entry point in loaded image to jump to 309795579793STom Rini 309895579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 309995579793STom Rini Define this if you need to first read the OOB and then the 310095579793STom Rini data. This is used for example on davinci plattforms. 310195579793STom Rini 310295579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 310395579793STom Rini Support for an OMAP3-specific set of functions to return the 310495579793STom Rini ID and MFR of the first attached NAND chip, if present. 310595579793STom Rini 31066a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 31076a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 31086a11cf48SDaniel Schwierzeck 31096a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 31106a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 31116a11cf48SDaniel Schwierzeck 31126a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 31136a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 31146a11cf48SDaniel Schwierzeck 3115c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3116c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3117c57b953dSPavel Machek 31186a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 31196a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 31201372cce2SMarian Balakowicz 3121ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3122ba1bee43SYing Zhang Support for the environment operating in SPL binary 3123ba1bee43SYing Zhang 3124ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3125ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3126ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3127ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3128ba1bee43SYing Zhang 312974752baaSScott Wood CONFIG_SPL_PAD_TO 31306113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 31316113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 31326113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 31336113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 31346113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 313574752baaSScott Wood 3136ca2fca22SScott Wood CONFIG_SPL_TARGET 3137ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3138ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3139ca2fca22SScott Wood example if more than one image needs to be produced. 3140ca2fca22SScott Wood 314187ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 314287ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 314387ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 314487ebee39SSimon Glass option to re-enable it. This will affect the output of the 314587ebee39SSimon Glass bootm command when booting a FIT image. 314687ebee39SSimon Glass 3147c609719bSwdenkModem Support: 3148c609719bSwdenk-------------- 3149c609719bSwdenk 3150566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3151c609719bSwdenk 315211ccc33fSMarcel Ziswiler- Modem support enable: 3153c609719bSwdenk CONFIG_MODEM_SUPPORT 3154c609719bSwdenk 3155c609719bSwdenk- RTS/CTS Flow control enable: 3156c609719bSwdenk CONFIG_HWFLOW 3157c609719bSwdenk 3158c609719bSwdenk- Modem debug support: 3159c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3160c609719bSwdenk 3161c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3162c609719bSwdenk for modem support. Useful only with BDI2000. 3163c609719bSwdenk 3164a8c7c708Swdenk- Interrupt support (PPC): 3165a8c7c708Swdenk 3166a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3167a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 316811ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3169a8c7c708Swdenk should set decrementer_count to appropriate value. If 317011ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3171a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 317211ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3173a8c7c708Swdenk specific handling. If board has watchdog / status_led 3174a8c7c708Swdenk / other_activity_monitor it works automatically from 3175a8c7c708Swdenk general timer_interrupt(). 3176a8c7c708Swdenk 3177c609719bSwdenk- General: 3178c609719bSwdenk 3179c609719bSwdenk In the target system modem support is enabled when a 3180c609719bSwdenk specific key (key combination) is pressed during 3181c609719bSwdenk power-on. Otherwise U-Boot will boot normally 318211ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3183c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3184c609719bSwdenk function, returning 1 and thus enabling modem 3185c609719bSwdenk initialization. 3186c609719bSwdenk 3187c609719bSwdenk If there are no modem init strings in the 3188c609719bSwdenk environment, U-Boot proceed to autoboot; the 3189c609719bSwdenk previous output (banner, info printfs) will be 319011ccc33fSMarcel Ziswiler suppressed, though. 3191c609719bSwdenk 3192c609719bSwdenk See also: doc/README.Modem 3193c609719bSwdenk 31949660e442SHelmut RaigerBoard initialization settings: 31959660e442SHelmut Raiger------------------------------ 31969660e442SHelmut Raiger 31979660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 31989660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 31999660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 32009660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 32019660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 32029660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 32039660e442SHelmut Raiger 32049660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 32059660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 32069660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 32079660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3208c609719bSwdenk 3209c609719bSwdenkConfiguration Settings: 3210c609719bSwdenk----------------------- 3211c609719bSwdenk 32126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3213c609719bSwdenk undefine this when you're short of memory. 3214c609719bSwdenk 32152fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 32162fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 32172fb2604dSPeter Tyser 32186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3219c609719bSwdenk prompt for user input. 3220c609719bSwdenk 32216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3222c609719bSwdenk 32236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3224c609719bSwdenk 32256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3226c609719bSwdenk 32276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3228c609719bSwdenk the application (usually a Linux kernel) when it is 3229c609719bSwdenk booted 3230c609719bSwdenk 32316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3232c609719bSwdenk List of legal baudrate settings for this board. 3233c609719bSwdenk 32346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3235c609719bSwdenk Suppress display of console information at boot. 3236c609719bSwdenk 32376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3238c609719bSwdenk If the board specific function 3239c609719bSwdenk extern int overwrite_console (void); 3240c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3241c609719bSwdenk serial port, else the settings in the environment are used. 3242c609719bSwdenk 32436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3244c609719bSwdenk Enable the call to overwrite_console(). 3245c609719bSwdenk 32466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3247c609719bSwdenk Enable overwrite of previous console environment settings. 3248c609719bSwdenk 32496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3250c609719bSwdenk Begin and End addresses of the area used by the 3251c609719bSwdenk simple memory test. 3252c609719bSwdenk 32536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3254c609719bSwdenk Enable an alternate, more extensive memory test. 3255c609719bSwdenk 32566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 32575f535fe1Swdenk Scratch address used by the alternate memory test 32585f535fe1Swdenk You only need to set this if address zero isn't writeable 32595f535fe1Swdenk 32606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 32616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 326214f73ca6SStefan Roese this specified memory area will get subtracted from the top 326311ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 326414f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 326514f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 326614f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 32675e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 326814f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 32695e12e75dSStefan Roese will have to get fixed in Linux additionally. 327014f73ca6SStefan Roese 327114f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 327214f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 327314f73ca6SStefan Roese be touched. 327414f73ca6SStefan Roese 327514f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 327614f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 327714f73ca6SStefan Roese then the end address of the Linux memory will be located at a 327814f73ca6SStefan Roese non page size aligned address and this could cause major 327914f73ca6SStefan Roese problems. 328014f73ca6SStefan Roese 32816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3282c609719bSwdenk Enable temporary baudrate change while serial download 3283c609719bSwdenk 32846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3285c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3286c609719bSwdenk 32876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3288c609719bSwdenk Physical start address of Motherboard I/O (if using a 3289c609719bSwdenk Cogent motherboard) 3290c609719bSwdenk 32916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3292c609719bSwdenk Physical start address of Flash memory. 3293c609719bSwdenk 32946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3295c609719bSwdenk Physical start address of boot monitor code (set by 3296c609719bSwdenk make config files to be same as the text base address 329714d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 32986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3299c609719bSwdenk 33006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 33013b57fe0aSwdenk Size of memory reserved for monitor code, used to 33023b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 33033b57fe0aSwdenk embedded within the U-Boot image, or in a separate 33043b57fe0aSwdenk flash sector. 3305c609719bSwdenk 33066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3307c609719bSwdenk Size of DRAM reserved for malloc() use. 3308c609719bSwdenk 33096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 331015940c9aSStefan Roese Normally compressed uImages are limited to an 331115940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 33126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 331315940c9aSStefan Roese to adjust this setting to your needs. 3314c609719bSwdenk 33156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3316c609719bSwdenk Maximum size of memory mapped by the startup code of 3317c609719bSwdenk the Linux kernel; all data that must be processed by 33187d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 33197d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 33207d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 33217d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3322c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3323c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3324c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3325c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3326c609719bSwdenk 3327fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3328fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3329fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3330fca43cc8SJohn Rigby is enabled. 3331fca43cc8SJohn Rigby 3332fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3333fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3334fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3335fca43cc8SJohn Rigby 3336fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3337fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3338fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3339fca43cc8SJohn Rigby 33406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3341c609719bSwdenk Max number of Flash memory banks 3342c609719bSwdenk 33436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3344c609719bSwdenk Max number of sectors on a Flash chip 3345c609719bSwdenk 33466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3347c609719bSwdenk Timeout for Flash erase operations (in ms) 3348c609719bSwdenk 33496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3350c609719bSwdenk Timeout for Flash write operations (in ms) 3351c609719bSwdenk 33526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 33538564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 33548564acf9Swdenk 33556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 33568564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 33578564acf9Swdenk 33586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 33598564acf9Swdenk If defined, hardware flash sectors protection is used 33608564acf9Swdenk instead of U-Boot software protection. 33618564acf9Swdenk 33626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3363c609719bSwdenk 3364c609719bSwdenk Enable TFTP transfers directly to flash memory; 3365c609719bSwdenk without this option such a download has to be 3366c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3367c609719bSwdenk copy from RAM to flash. 3368c609719bSwdenk 3369c609719bSwdenk The two-step approach is usually more reliable, since 3370c609719bSwdenk you can check if the download worked before you erase 337111ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 337211ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3373c609719bSwdenk downloaded image) this option may be very useful. 3374c609719bSwdenk 33756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3376c609719bSwdenk Define if the flash driver uses extra elements in the 33775653fc33Swdenk common flash structure for storing flash geometry. 33785653fc33Swdenk 337900b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 33805653fc33Swdenk This option also enables the building of the cfi_flash driver 33815653fc33Swdenk in the drivers directory 338253cf9435Sstroese 338391809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 338491809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 338591809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 338691809ed5SPiotr Ziecik to the MTD layer. 338791809ed5SPiotr Ziecik 33886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 338996ef831fSGuennadi Liakhovetski Use buffered writes to flash. 339096ef831fSGuennadi Liakhovetski 339196ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 339296ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 339396ef831fSGuennadi Liakhovetski write commands. 339496ef831fSGuennadi Liakhovetski 33956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 33965568e613SStefan Roese If this option is defined, the common CFI flash doesn't 33975568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 33985568e613SStefan Roese is useful, if some of the configured banks are only 33995568e613SStefan Roese optionally available. 34005568e613SStefan Roese 34019a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 34029a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 34039a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 34049a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 34059a042e9cSJerry Van Baren 3406352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3407352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3408352ef3f1SStefan Roese against the source after the write operation. An error message 3409352ef3f1SStefan Roese will be printed when the contents are not identical. 3410352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3411352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3412352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3413352ef3f1SStefan Roese this option if you really know what you are doing. 3414352ef3f1SStefan Roese 34156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 341611ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 341711ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 341853cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 341953cf9435Sstroese buffers can be full shortly after enabling the interface 342011ccc33fSMarcel Ziswiler on high Ethernet traffic. 342153cf9435Sstroese Defaults to 4 if not defined. 3422c609719bSwdenk 3423ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3424ea882bafSWolfgang Denk 3425ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3426ea882bafSWolfgang Denk internally to store the environment settings. The default 3427ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3428ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3429ea882bafSWolfgang Denk lib/hashtable.c for details. 3430ea882bafSWolfgang Denk 34312598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 34322598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 34332598090bSJoe Hershberger Enable validation of the values given to enviroment variables when 34342598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 34352598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 34362598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 34372598090bSJoe Hershberger 34382598090bSJoe Hershberger The format of the list is: 34392598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3440267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3441267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 34422598090bSJoe Hershberger entry = variable_name[:attributes] 34432598090bSJoe Hershberger list = entry[,list] 34442598090bSJoe Hershberger 34452598090bSJoe Hershberger The type attributes are: 34462598090bSJoe Hershberger s - String (default) 34472598090bSJoe Hershberger d - Decimal 34482598090bSJoe Hershberger x - Hexadecimal 34492598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 34502598090bSJoe Hershberger i - IP address 34512598090bSJoe Hershberger m - MAC address 34522598090bSJoe Hershberger 3453267541f7SJoe Hershberger The access attributes are: 3454267541f7SJoe Hershberger a - Any (default) 3455267541f7SJoe Hershberger r - Read-only 3456267541f7SJoe Hershberger o - Write-once 3457267541f7SJoe Hershberger c - Change-default 3458267541f7SJoe Hershberger 34592598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 34602598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 34612598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 34622598090bSJoe Hershberger 34632598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 34642598090bSJoe Hershberger Define this to a list (string) to define validation that 34652598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 34662598090bSJoe Hershberger environment variable. To override a setting in the static 34672598090bSJoe Hershberger list, simply add an entry for the same variable name to the 34682598090bSJoe Hershberger ".flags" variable. 34692598090bSJoe Hershberger 3470267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3471267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3472267541f7SJoe Hershberger access flags. 3473267541f7SJoe Hershberger 34745c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 34755c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 34765c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 34775c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 34785c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 34795c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 34805c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 34815c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 34825c1a7ea6SSimon Glass your board please report the problem and send patches! 34835c1a7ea6SSimon Glass 3484632efa74SSimon Glass- CONFIG_SYS_SYM_OFFSETS 3485632efa74SSimon Glass This is set by architectures that use offsets for link symbols 3486632efa74SSimon Glass instead of absolute values. So bss_start is obtained using an 3487632efa74SSimon Glass offset _bss_start_ofs from CONFIG_SYS_TEXT_BASE, rather than 3488632efa74SSimon Glass directly. You should not need to touch this setting. 3489632efa74SSimon Glass 34900b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 34910b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 34920b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 34930b1b60c7SLokesh Vutla the value can be calulated on a given board. 3494632efa74SSimon Glass 3495c609719bSwdenkThe following definitions that deal with the placement and management 3496c609719bSwdenkof environment data (variable area); in general, we support the 3497c609719bSwdenkfollowing configurations: 3498c609719bSwdenk 3499c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3500c3eb3fe4SMike Frysinger 3501c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3502c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3503c3eb3fe4SMike Frysinger 35045a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3505c609719bSwdenk 3506c609719bSwdenk Define this if the environment is in flash memory. 3507c609719bSwdenk 3508c609719bSwdenk a) The environment occupies one whole flash sector, which is 3509c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3510c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3511c609719bSwdenk sector" type flash chips, which have several smaller 3512c609719bSwdenk sectors at the start or the end. For instance, such a 3513c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3514c609719bSwdenk such a case you would place the environment in one of the 3515c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3516c609719bSwdenk "top boot sector" type flash chips, you would put the 3517c609719bSwdenk environment in one of the last sectors, leaving a gap 3518c609719bSwdenk between U-Boot and the environment. 3519c609719bSwdenk 35200e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3521c609719bSwdenk 3522c609719bSwdenk Offset of environment data (variable area) to the 3523c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3524c609719bSwdenk type flash chips the second sector can be used: the offset 3525c609719bSwdenk for this sector is given here. 3526c609719bSwdenk 35276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3528c609719bSwdenk 35290e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3530c609719bSwdenk 3531c609719bSwdenk This is just another way to specify the start address of 3532c609719bSwdenk the flash sector containing the environment (instead of 35330e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3534c609719bSwdenk 35350e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3536c609719bSwdenk 3537c609719bSwdenk Size of the sector containing the environment. 3538c609719bSwdenk 3539c609719bSwdenk 3540c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3541c609719bSwdenk In such a case you don't want to spend a whole sector for 3542c609719bSwdenk the environment. 3543c609719bSwdenk 35440e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3545c609719bSwdenk 35465a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 35470e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3548c609719bSwdenk of this flash sector for the environment. This saves 3549c609719bSwdenk memory for the RAM copy of the environment. 3550c609719bSwdenk 3551c609719bSwdenk It may also save flash memory if you decide to use this 3552c609719bSwdenk when your environment is "embedded" within U-Boot code, 3553c609719bSwdenk since then the remainder of the flash sector could be used 3554c609719bSwdenk for U-Boot code. It should be pointed out that this is 3555c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3556c609719bSwdenk updating the environment in flash makes it always 3557c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3558c609719bSwdenk wrong before the contents has been restored from a copy in 3559c609719bSwdenk RAM, your target system will be dead. 3560c609719bSwdenk 35610e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 35620e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3563c609719bSwdenk 3564c609719bSwdenk These settings describe a second storage area used to hold 356511ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 35663e38691eSwdenk a valid backup copy in case there is a power failure during 3567c609719bSwdenk a "saveenv" operation. 3568c609719bSwdenk 3569c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3570c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3571c609719bSwdenkaccordingly! 3572c609719bSwdenk 3573c609719bSwdenk 35749314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3575c609719bSwdenk 3576c609719bSwdenk Define this if you have some non-volatile memory device 3577c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3578c609719bSwdenk environment. 3579c609719bSwdenk 35800e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 35810e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3582c609719bSwdenk 358311ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3584c609719bSwdenk want to use for environment. It is assumed that this memory 3585c609719bSwdenk can just be read and written to, without any special 3586c609719bSwdenk provision. 3587c609719bSwdenk 3588c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3589c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 359011ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3591c609719bSwdenkU-Boot will hang. 3592c609719bSwdenk 3593c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3594c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3595c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3596c609719bSwdenkto save the current settings. 3597c609719bSwdenk 3598c609719bSwdenk 3599bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3600c609719bSwdenk 3601c609719bSwdenk Use this if you have an EEPROM or similar serial access 3602c609719bSwdenk device and a driver for it. 3603c609719bSwdenk 36040e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 36050e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3606c609719bSwdenk 3607c609719bSwdenk These two #defines specify the offset and size of the 3608c609719bSwdenk environment area within the total memory of your EEPROM. 3609c609719bSwdenk 36106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3611c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3612c609719bSwdenk The default address is zero. 3613c609719bSwdenk 36146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3615c609719bSwdenk If defined, the number of bits used to address bytes in a 3616c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3617c609719bSwdenk would require six bits. 3618c609719bSwdenk 36196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3620c609719bSwdenk If defined, the number of milliseconds to delay between 3621c609719bSwdenk page writes. The default is zero milliseconds. 3622c609719bSwdenk 36236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3624c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3625c609719bSwdenk that this is NOT the chip address length! 3626c609719bSwdenk 36276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 36285cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 36295cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 36305cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 36315cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 36325cf91d6bSwdenk byte chips. 36335cf91d6bSwdenk 36345cf91d6bSwdenk Note that we consider the length of the address field to 36355cf91d6bSwdenk still be one byte because the extra address bits are hidden 36365cf91d6bSwdenk in the chip address. 36375cf91d6bSwdenk 36386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3639c609719bSwdenk The size in bytes of the EEPROM device. 3640c609719bSwdenk 3641548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3642548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3643548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3644548738b4SHeiko Schocher 3645548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3646548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3647548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3648548738b4SHeiko Schocher EEPROM. For example: 3649548738b4SHeiko Schocher 3650ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3651548738b4SHeiko Schocher 3652548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3653548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3654c609719bSwdenk 3655057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 36565779d8d9Swdenk 36575779d8d9Swdenk Define this if you have a DataFlash memory device which you 36585779d8d9Swdenk want to use for the environment. 36595779d8d9Swdenk 36600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 36610e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 36620e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 36635779d8d9Swdenk 36645779d8d9Swdenk These three #defines specify the offset and size of the 36655779d8d9Swdenk environment area within the total memory of your DataFlash placed 36665779d8d9Swdenk at the specified address. 36675779d8d9Swdenk 36680a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 36690a85a9e7SLiu Gang 36700a85a9e7SLiu Gang Define this if you have a remote memory space which you 36710a85a9e7SLiu Gang want to use for the local device's environment. 36720a85a9e7SLiu Gang 36730a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 36740a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 36750a85a9e7SLiu Gang 36760a85a9e7SLiu Gang These two #defines specify the address and size of the 36770a85a9e7SLiu Gang environment area within the remote memory space. The 36780a85a9e7SLiu Gang local device can get the environment from remote memory 3679fc54c7faSLiu Gang space by SRIO or PCIE links. 36800a85a9e7SLiu Gang 36810a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 36820a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3683fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3684fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 36850a85a9e7SLiu Gang 368651bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 368713a5695bSwdenk 368813a5695bSwdenk Define this if you have a NAND device which you want to use 368913a5695bSwdenk for the environment. 369013a5695bSwdenk 36910e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 36920e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 369313a5695bSwdenk 369413a5695bSwdenk These two #defines specify the offset and size of the environment 3695fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3696fdd813deSScott Wood aligned to an erase block boundary. 36975779d8d9Swdenk 3698fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3699e443c944SMarkus Klotzbuecher 37000e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3701fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3702fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3703fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3704fdd813deSScott Wood aligned to an erase block boundary. 3705e443c944SMarkus Klotzbuecher 3706fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3707fdd813deSScott Wood 3708fdd813deSScott Wood Specifies the length of the region in which the environment 3709fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3710fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3711fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3712fdd813deSScott Wood the range to be avoided. 3713fdd813deSScott Wood 3714fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3715fdd813deSScott Wood 3716fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3717fdd813deSScott Wood environment from block zero's out-of-band data. The 3718fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3719fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3720fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3721e443c944SMarkus Klotzbuecher 3722b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3723b74ab737SGuennadi Liakhovetski 3724b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3725b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3726b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3727b74ab737SGuennadi Liakhovetski 37282b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 37292b74433fSJoe Hershberger 37302b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 37312b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 37322b74433fSJoe Hershberger accesses, which is important on NAND. 37332b74433fSJoe Hershberger 37342b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 37352b74433fSJoe Hershberger 37362b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 37372b74433fSJoe Hershberger 37382b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 37392b74433fSJoe Hershberger 37402b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 37412b74433fSJoe Hershberger environment in. 37422b74433fSJoe Hershberger 3743785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 3744785881f7SJoe Hershberger 3745785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 3746785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 3747785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 3748785881f7SJoe Hershberger 37492b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 37502b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 37512b74433fSJoe Hershberger 37522b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 37532b74433fSJoe Hershberger when storing the env in UBI. 37542b74433fSJoe Hershberger 375506e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 375606e4ae5fSStephen Warren 375706e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 375806e4ae5fSStephen Warren environment. 375906e4ae5fSStephen Warren 376006e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 376106e4ae5fSStephen Warren 376206e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 376306e4ae5fSStephen Warren 376406e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 376506e4ae5fSStephen Warren 376606e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 376706e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 376806e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 376906e4ae5fSStephen Warren 377006e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 377106e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 377206e4ae5fSStephen Warren 377306e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 377406e4ae5fSStephen Warren area within the specified MMC device. 377506e4ae5fSStephen Warren 37765c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 37775c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 37785c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 37795c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 37805c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 37815c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 37825c088ee8SStephen Warren maximum possible space before it, to store other data. 37835c088ee8SStephen Warren 378406e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 378506e4ae5fSStephen Warren MMC sector boundary. 378606e4ae5fSStephen Warren 378706e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 378806e4ae5fSStephen Warren 378906e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 379006e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 379106e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 379206e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 379306e4ae5fSStephen Warren 37945c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 37955c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 37965c088ee8SStephen Warren 379706e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 379806e4ae5fSStephen Warren an MMC sector boundary. 379906e4ae5fSStephen Warren 380006e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 380106e4ae5fSStephen Warren 380206e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 380306e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 380406e4ae5fSStephen Warren CONFIG_ENV_SIZE. 380506e4ae5fSStephen Warren 38066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3807c609719bSwdenk 3808c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3809c609719bSwdenk area is used at an early stage (ROM part) if the environment 3810c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3811c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3812c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3813c609719bSwdenk to be a good choice since it makes it far enough from the 3814c609719bSwdenk start of the data area as well as from the stack pointer. 3815c609719bSwdenk 3816e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3817c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3818cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3819c609719bSwdenkuntil then to read environment variables. 3820c609719bSwdenk 382185ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 382285ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 382385ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 382485ec0bccSwdenknecessary, because the first environment variable we need is the 382585ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 382685ec0bccSwdenkhave any device yet where we could complain.] 3827c609719bSwdenk 3828c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3829c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 383085ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3831c609719bSwdenk 38326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3833fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3834fc3e2165Swdenk 38356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3836fc3e2165Swdenk also needs to be defined. 3837fc3e2165Swdenk 38386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3839fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3840c609719bSwdenk 3841f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3842f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3843f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3844f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3845f5675aa5SRon Madrid space for already greatly restricted images, including but not 3846f5675aa5SRon Madrid limited to NAND_SPL configurations. 3847f5675aa5SRon Madrid 3848b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 3849b2b92f53SSimon Glass Display information about the board that U-Boot is running on 3850b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 3851b2b92f53SSimon Glass to do this. 3852b2b92f53SSimon Glass 3853e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 3854e2e3e2b1SSimon Glass Similar to the previous option, but display this information 3855e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 3856e2e3e2b1SSimon Glass present. 3857e2e3e2b1SSimon Glass 3858c609719bSwdenkLow Level (hardware related) configuration options: 3859dc7c9a1aSwdenk--------------------------------------------------- 3860c609719bSwdenk 38616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3862c609719bSwdenk Cache Line Size of the CPU. 3863c609719bSwdenk 38646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3865c609719bSwdenk Default address of the IMMR after system reset. 38662535d602Swdenk 38672535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 38682535d602Swdenk and RPXsuper) to be able to adjust the position of 38692535d602Swdenk the IMMR register after a reset. 3870c609719bSwdenk 3871e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3872e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3873e46fedfeSTimur Tabi PowerPC SOCs. 3874e46fedfeSTimur Tabi 3875e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3876e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3877e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3878e46fedfeSTimur Tabi 3879e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3880e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3881e46fedfeSTimur Tabi 3882e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3883e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3884e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3885e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3886e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3887e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3888e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3889e46fedfeSTimur Tabi 3890e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3891e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3892e46fedfeSTimur Tabi 3893e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3894e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3895e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3896e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3897e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3898e46fedfeSTimur Tabi 3899e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3900e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3901e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3902e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3903e46fedfeSTimur Tabi 3904e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3905e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3906e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3907e46fedfeSTimur Tabi 39087f6c2cbcSwdenk- Floppy Disk Support: 39096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 39107f6c2cbcSwdenk 39117f6c2cbcSwdenk the default drive number (default value 0) 39127f6c2cbcSwdenk 39136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 39147f6c2cbcSwdenk 391511ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 39167f6c2cbcSwdenk (default value 1) 39177f6c2cbcSwdenk 39186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 39197f6c2cbcSwdenk 39207f6c2cbcSwdenk defines the offset of register from address. It 39217f6c2cbcSwdenk depends on which part of the data bus is connected to 392211ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 39237f6c2cbcSwdenk 39246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 39256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 39267f6c2cbcSwdenk default value. 39277f6c2cbcSwdenk 39286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 39297f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 39307f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 39317f6c2cbcSwdenk source code. It is used to make hardware dependant 39327f6c2cbcSwdenk initializations. 39337f6c2cbcSwdenk 39340abddf82SMacpaul Lin- CONFIG_IDE_AHB: 39350abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 39360abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 39370abddf82SMacpaul Lin When software is doing ATA command and data transfer to 39380abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 39390abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 39400abddf82SMacpaul Lin is requierd. 39410abddf82SMacpaul Lin 39426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 394325d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 394425d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3945c609719bSwdenk 39466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3947c609719bSwdenk 39487152b1d0Swdenk Start address of memory area that can be used for 3949c609719bSwdenk initial data and stack; please note that this must be 3950c609719bSwdenk writable memory that is working WITHOUT special 3951c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3952c609719bSwdenk will become available only after programming the 3953c609719bSwdenk memory controller and running certain initialization 3954c609719bSwdenk sequences. 3955c609719bSwdenk 3956c609719bSwdenk U-Boot uses the following memory types: 3957c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3958c609719bSwdenk - MPC824X: data cache 3959c609719bSwdenk - PPC4xx: data cache 3960c609719bSwdenk 39616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3962c609719bSwdenk 3963c609719bSwdenk Offset of the initial data structure in the memory 39646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 39656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3966c609719bSwdenk data is located at the end of the available space 3967553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 39686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 39696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 39706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3971c609719bSwdenk 3972c609719bSwdenk Note: 3973c609719bSwdenk On the MPC824X (or other systems that use the data 3974c609719bSwdenk cache for initial memory) the address chosen for 39756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3976c609719bSwdenk point to an otherwise UNUSED address space between 3977c609719bSwdenk the top of RAM and the start of the PCI space. 3978c609719bSwdenk 39796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3980c609719bSwdenk 39816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3982c609719bSwdenk 39836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3984c609719bSwdenk 39856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3986c609719bSwdenk 39876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3988c609719bSwdenk 39896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3990c609719bSwdenk 39916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3992c609719bSwdenk SDRAM timing 3993c609719bSwdenk 39946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3995c609719bSwdenk periodic timer for refresh 3996c609719bSwdenk 39976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3998c609719bSwdenk 39996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 40006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 40016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 40026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4003c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4004c609719bSwdenk 4005c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 40066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 40076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4008c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4009c609719bSwdenk 40106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 40116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4012c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4013c609719bSwdenk Prescaler definitions (SDRAM timing) 4014c609719bSwdenk 40156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4016c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4017c609719bSwdenk define relocation offset in DPRAM [DSP2] 4018c609719bSwdenk 40196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4020b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4021b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4022b423d055SHeiko Schocher 40236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4024c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4025c609719bSwdenk define relocation offset in DPRAM [SCC4] 4026c609719bSwdenk 40276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4028c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4029c609719bSwdenk wrong setting might damage your board. Read 4030c609719bSwdenk doc/README.MBX before setting this variable! 4031c609719bSwdenk 40326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4033ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4034ea909b76Swdenk (Power On Self Tests). This definition overrides 4035ea909b76Swdenk #define'd default value in commproc.h resp. 4036ea909b76Swdenk cpm_8260.h. 4037ea909b76Swdenk 40386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 40396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 40406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 40416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 40426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 40436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 40446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 40456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4046a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 40475d232d0eSwdenk 40489cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 40499cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 40509cacf4fcSDirk Eibach required. 40519cacf4fcSDirk Eibach 405269fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 405369fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 405469fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 405569fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 405669fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 405769fd2d3bSAndrew Sharp by coreboot or similar. 405869fd2d3bSAndrew Sharp 4059842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4060842033e6SGabor Juhos Enable support for indirect PCI bridges. 4061842033e6SGabor Juhos 4062a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4063a09b9b68SKumar Gala Chip has SRIO or not 4064a09b9b68SKumar Gala 4065a09b9b68SKumar Gala- CONFIG_SRIO1: 4066a09b9b68SKumar Gala Board has SRIO 1 port available 4067a09b9b68SKumar Gala 4068a09b9b68SKumar Gala- CONFIG_SRIO2: 4069a09b9b68SKumar Gala Board has SRIO 2 port available 4070a09b9b68SKumar Gala 4071c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4072c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4073c8b28152SLiu Gang 4074a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4075a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4076a09b9b68SKumar Gala 4077a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4078a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4079a09b9b68SKumar Gala 4080a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4081a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4082a09b9b68SKumar Gala 408366bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 408466bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 408566bd1846SFabio Estevam a 16 bit bus. 408666bd1846SFabio Estevam Not all NAND drivers use this symbol. 4087a430e916SFabio Estevam Example of drivers that use it: 408866bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4089a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4090eced4626SAlex Waterman 4091eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4092eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4093eced4626SAlex Waterman a default value will be used. 4094eced4626SAlex Waterman 4095bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4096218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4097218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4098218ca724SWolfgang Denk 4099bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4100bb99ad6dSBen Warren I2C address of the SPD EEPROM 4101bb99ad6dSBen Warren 41026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4103218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4104218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4105218ca724SWolfgang Denk to something your driver can deal with. 4106bb99ad6dSBen Warren 41071b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 41081b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 41091b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 41101b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 41111b3e3c4fSYork Sun header files or board specific files. 41121b3e3c4fSYork Sun 41136f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 41146f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 41156f5e1dc5SYork Sun 41166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4117218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4118218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 41192ad6b513STimur Tabi 4120c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4121c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4122c26e454dSwdenk 4123c26e454dSwdenk- CONFIG_FEC[12]_PHY 4124c26e454dSwdenk Define to the hardcoded PHY address which corresponds 41256e592385Swdenk to the given FEC; i. e. 4126c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4127c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4128c26e454dSwdenk 4129c26e454dSwdenk When set to -1, means to probe for first available. 4130c26e454dSwdenk 4131c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4132c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4133c26e454dSwdenk (so program the FEC to ignore it). 4134c26e454dSwdenk 4135c26e454dSwdenk- CONFIG_RMII 4136c26e454dSwdenk Enable RMII mode for all FECs. 4137c26e454dSwdenk Note that this is a global option, we can't 4138c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4139c26e454dSwdenk 41405cf91d6bSwdenk- CONFIG_CRC32_VERIFY 41415cf91d6bSwdenk Add a verify option to the crc32 command. 41425cf91d6bSwdenk The syntax is: 41435cf91d6bSwdenk 41445cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 41455cf91d6bSwdenk 41465cf91d6bSwdenk Where address/count indicate a memory area 41475cf91d6bSwdenk and crc32 is the correct crc32 which the 41485cf91d6bSwdenk area should have. 41495cf91d6bSwdenk 415056523f12Swdenk- CONFIG_LOOPW 415156523f12Swdenk Add the "loopw" memory command. This only takes effect if 4152602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 415356523f12Swdenk 41547b466641Sstroese- CONFIG_MX_CYCLIC 41557b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 41567b466641Sstroese "md/mw" commands. 41577b466641Sstroese Examples: 41587b466641Sstroese 41597b466641Sstroese => mdc.b 10 4 500 41607b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 41617b466641Sstroese 41627b466641Sstroese => mwc.l 100 12345678 10 41637b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 41647b466641Sstroese 41657b466641Sstroese This only takes effect if the memory commands are activated 4166602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 41677b466641Sstroese 41688aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4169afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4170e03f3169SWolfgang Denk low level initializations (like setting up the memory 4171e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4172e03f3169SWolfgang Denk relocate itself into RAM. 41738aa1a2d1Swdenk 4174e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4175e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4176e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4177e03f3169SWolfgang Denk these initializations itself. 41788aa1a2d1Swdenk 4179401bb30bSAneesh V- CONFIG_SPL_BUILD 4180df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4181df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4182df81238bSMagnus Lilja compiling a NAND SPL. 4183400558b5Swdenk 41845df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 41855df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 41865df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 41875df572f0SYing Zhang previous 4k of the .text section. 41885df572f0SYing Zhang 41894213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 41904213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 41914213fc29SSimon Glass effective address. It is therefore not necessary to regard 41924213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 41934213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 41944213fc29SSimon Glass it maintains its own little RAM buffer which contains all 41954213fc29SSimon Glass addressable memory. This option causes some memory accesses 41964213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 41974213fc29SSimon Glass 4198d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4199d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4200d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4201d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4202d8834a13SMatthias Weisser conditions but may increase the binary size. 4203d8834a13SMatthias Weisser 4204588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4205588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4206588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4207b16f521aSGabe Black 4208fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4209fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4210fc33705eSMark Jackson 4211fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 42125b5ece9eSGabe Black 4213f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4214f2717b47STimur Tabi----------------------------------- 4215f2717b47STimur Tabi 4216f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4217f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4218f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4219f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4220f2717b47STimur Tabiwithin that device. 4221f2717b47STimur Tabi 4222f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 4223f2717b47STimur Tabi The address in the storage device where the firmware is located. The 4224f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4225f2717b47STimur Tabi is also specified. 4226f2717b47STimur Tabi 4227f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4228f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4229f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4230f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4231f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4232f2717b47STimur Tabi 4233f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4234f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4235f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4236f2717b47STimur Tabi virtual address in NOR flash. 4237f2717b47STimur Tabi 4238f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4239f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4240f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4241f2717b47STimur Tabi 4242f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4243f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4244f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4245f2717b47STimur Tabi 4246f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4247f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4248f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4249f2717b47STimur Tabi 4250292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4251292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4252292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4253fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4254fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4255fc54c7faSLiu Gang master's memory space. 4256f2717b47STimur Tabi 4257c609719bSwdenkBuilding the Software: 4258c609719bSwdenk====================== 4259c609719bSwdenk 4260218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4261218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4262218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4263218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4264218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4265218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4266c609719bSwdenk 4267218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4268218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4269218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4270218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4271218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4272c609719bSwdenk 4273218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4274218ca724SWolfgang Denk $ export CROSS_COMPILE 4275c609719bSwdenk 42762f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 42772f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 42782f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 42792f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 42802f8d396bSPeter Tyser 42812f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 42822f8d396bSPeter Tyser 42832f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 42842f8d396bSPeter Tyser be executed on computers running Windows. 42852f8d396bSPeter Tyser 4286c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4287c609719bSwdenksources you must configure U-Boot for one specific board type. This 4288c609719bSwdenkis done by typing: 4289c609719bSwdenk 4290c609719bSwdenk make NAME_config 4291c609719bSwdenk 4292218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 42934d675ae6SMichael Jonesrations; see boards.cfg for supported names. 429454387ac9Swdenk 4295c609719bSwdenkNote: for some board special configuration names may exist; check if 4296c609719bSwdenk additional information is available from the board vendor; for 42972729af9dSwdenk instance, the TQM823L systems are available without (standard) 42982729af9dSwdenk or with LCD support. You can select such additional "features" 429911ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4300c609719bSwdenk 43012729af9dSwdenk make TQM823L_config 43022729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4303c609719bSwdenk 4304c609719bSwdenk make TQM823L_LCD_config 4305c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4306c609719bSwdenk 4307c609719bSwdenk etc. 4308c609719bSwdenk 4309c609719bSwdenk 4310c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 43117152b1d0Swdenkimages ready for download to / installation on your system: 4312c609719bSwdenk 4313c609719bSwdenk- "u-boot.bin" is a raw binary image 4314c609719bSwdenk- "u-boot" is an image in ELF binary format 4315c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4316c609719bSwdenk 4317baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4318baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4319baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4320baf31249SMarian Balakowicz 4321baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4322baf31249SMarian Balakowicz 4323baf31249SMarian Balakowicz make O=/tmp/build distclean 4324baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4325baf31249SMarian Balakowicz make O=/tmp/build all 4326baf31249SMarian Balakowicz 4327baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4328baf31249SMarian Balakowicz 4329baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4330baf31249SMarian Balakowicz make distclean 4331baf31249SMarian Balakowicz make NAME_config 4332baf31249SMarian Balakowicz make all 4333baf31249SMarian Balakowicz 4334baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4335baf31249SMarian Balakowiczvariable. 4336baf31249SMarian Balakowicz 4337c609719bSwdenk 4338c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4339c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4340c609719bSwdenknative "make". 4341c609719bSwdenk 4342c609719bSwdenk 4343c609719bSwdenkIf the system board that you have is not listed, then you will need 4344c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4345c609719bSwdenksteps: 4346c609719bSwdenk 4347c609719bSwdenk1. Add a new configuration option for your board to the toplevel 43484d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 43494d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4350c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 435185ec0bccSwdenk files you need. In your board directory, you will need at least 435285ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 435385ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 435485ec0bccSwdenk your board 4355c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4356c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 435785ec0bccSwdenk4. Run "make <board>_config" with your new name. 4358c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4359c609719bSwdenk to be installed on your target system. 436085ec0bccSwdenk6. Debug and solve any problems that might arise. 4361c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4362c609719bSwdenk 4363c609719bSwdenk 4364c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4365c609719bSwdenk============================================================== 4366c609719bSwdenk 4367c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4368c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4369c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4370c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4371218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4372c609719bSwdenk 4373c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4374c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4375c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4376c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4377c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 43787152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4379218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4380218ca724SWolfgang Denkyou can type 4381c609719bSwdenk 4382c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4383c609719bSwdenk 4384c609719bSwdenkor to build on a native PowerPC system you can type 4385c609719bSwdenk 4386c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4387c609719bSwdenk 4388218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4389218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4390218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4391218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4392218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4393218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4394218ca724SWolfgang Denkvariable. For example: 4395baf31249SMarian Balakowicz 4396baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4397baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4398baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4399baf31249SMarian Balakowicz 4400218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4401218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4402218ca724SWolfgang Denkduring the whole build process. 4403baf31249SMarian Balakowicz 4404baf31249SMarian Balakowicz 4405c609719bSwdenkSee also "U-Boot Porting Guide" below. 4406c609719bSwdenk 4407c609719bSwdenk 4408c609719bSwdenkMonitor Commands - Overview: 4409c609719bSwdenk============================ 4410c609719bSwdenk 4411c609719bSwdenkgo - start application at address 'addr' 4412c609719bSwdenkrun - run commands in an environment variable 4413c609719bSwdenkbootm - boot application image from memory 4414c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 441544f074c7SMarek Vasutbootz - boot zImage from memory 4416c609719bSwdenktftpboot- boot image via network using TFTP protocol 4417c609719bSwdenk and env variables "ipaddr" and "serverip" 4418c609719bSwdenk (and eventually "gatewayip") 44191fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4420c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4421c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4422c609719bSwdenkloads - load S-Record file over serial line 4423c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4424c609719bSwdenkmd - memory display 4425c609719bSwdenkmm - memory modify (auto-incrementing) 4426c609719bSwdenknm - memory modify (constant address) 4427c609719bSwdenkmw - memory write (fill) 4428c609719bSwdenkcp - memory copy 4429c609719bSwdenkcmp - memory compare 4430c609719bSwdenkcrc32 - checksum calculation 44310f89c54bSPeter Tyseri2c - I2C sub-system 4432c609719bSwdenksspi - SPI utility commands 4433c609719bSwdenkbase - print or set address offset 4434c609719bSwdenkprintenv- print environment variables 4435c609719bSwdenksetenv - set environment variables 4436c609719bSwdenksaveenv - save environment variables to persistent storage 4437c609719bSwdenkprotect - enable or disable FLASH write protection 4438c609719bSwdenkerase - erase FLASH memory 4439c609719bSwdenkflinfo - print FLASH memory information 444010635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4441c609719bSwdenkbdinfo - print Board Info structure 4442c609719bSwdenkiminfo - print header information for application image 4443c609719bSwdenkconinfo - print console devices and informations 4444c609719bSwdenkide - IDE sub-system 4445c609719bSwdenkloop - infinite loop on address range 444656523f12Swdenkloopw - infinite write loop on address range 4447c609719bSwdenkmtest - simple RAM test 4448c609719bSwdenkicache - enable or disable instruction cache 4449c609719bSwdenkdcache - enable or disable data cache 4450c609719bSwdenkreset - Perform RESET of the CPU 4451c609719bSwdenkecho - echo args to console 4452c609719bSwdenkversion - print monitor version 4453c609719bSwdenkhelp - print online help 4454c609719bSwdenk? - alias for 'help' 4455c609719bSwdenk 4456c609719bSwdenk 4457c609719bSwdenkMonitor Commands - Detailed Description: 4458c609719bSwdenk======================================== 4459c609719bSwdenk 4460c609719bSwdenkTODO. 4461c609719bSwdenk 4462c609719bSwdenkFor now: just type "help <command>". 4463c609719bSwdenk 4464c609719bSwdenk 4465c609719bSwdenkEnvironment Variables: 4466c609719bSwdenk====================== 4467c609719bSwdenk 4468c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4469c609719bSwdenkcan be made persistent by saving to Flash memory. 4470c609719bSwdenk 4471c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4472c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4473c609719bSwdenkwithout a value can be used to delete a variable from the 4474c609719bSwdenkenvironment. As long as you don't save the environment you are 4475c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4476c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4477c609719bSwdenk 4478c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4479c96f86eeSWolfgang Denk 4480c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4481c609719bSwdenk 4482c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4483c609719bSwdenk 4484c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4485c609719bSwdenk 4486c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4487c609719bSwdenk 4488c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4489c609719bSwdenk 4490c609719bSwdenk bootfile - Name of the image to load with TFTP 4491c609719bSwdenk 44927d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 44937d721e34SBartlomiej Sieka command can be restricted. This variable is given as 44947d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 44957d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 44967d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 44977d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4498c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4499c3624e6eSGrant Likely bootm_mapsize. 4500c3624e6eSGrant Likely 4501c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4502c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4503c3624e6eSGrant Likely defines the size of the memory region starting at base 4504c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4505c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4506c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4507c3624e6eSGrant Likely used otherwise. 45087d721e34SBartlomiej Sieka 45097d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 45107d721e34SBartlomiej Sieka command can be restricted. This variable is given as 45117d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 45127d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 45137d721e34SBartlomiej Sieka environment variable. 45147d721e34SBartlomiej Sieka 45154bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 45164bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 45174bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 45184bae9090SBartlomiej Sieka 4519c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4520c609719bSwdenk "bootp" will just load perform a lookup of the 4521c609719bSwdenk configuration from the BOOTP server, but not try to 4522c609719bSwdenk load any image using TFTP 4523c609719bSwdenk 4524c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4525c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4526c609719bSwdenk be automatically started (by internally calling 4527c609719bSwdenk "bootm") 4528c609719bSwdenk 45294a6fd34bSwdenk If set to "no", a standalone image passed to the 45304a6fd34bSwdenk "bootm" command will be copied to the load address 45314a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 45324a6fd34bSwdenk This can be used to load and uncompress arbitrary 45334a6fd34bSwdenk data. 45344a6fd34bSwdenk 4535a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4536a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4537fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4538fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4539fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4540fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4541fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4542fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4543fa34f6b2SShawn Guo access it during the boot procedure. 4544fa34f6b2SShawn Guo 4545a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4546a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4547a28afca5SDavid A. Long to work it must reside in writable memory, have 4548a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4549a28afca5SDavid A. Long add the information it needs into it, and the memory 4550a28afca5SDavid A. Long must be accessible by the kernel. 4551a28afca5SDavid A. Long 4552eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4553eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4554eea63e05SSimon Glass defined. 4555eea63e05SSimon Glass 455617ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 455717ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 455817ea1177Swdenk mode (400kHZ). This environment variable is used in 455917ea1177Swdenk initialization code. So, for changes to be effective 456017ea1177Swdenk it must be saved and board must be reset. 456117ea1177Swdenk 4562c609719bSwdenk initrd_high - restrict positioning of initrd images: 4563c609719bSwdenk If this variable is not set, initrd images will be 4564c609719bSwdenk copied to the highest possible address in RAM; this 4565c609719bSwdenk is usually what you want since it allows for 4566c609719bSwdenk maximum initrd size. If for some reason you want to 4567c609719bSwdenk make sure that the initrd image is loaded below the 45686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4569c609719bSwdenk variable to a value of "no" or "off" or "0". 4570c609719bSwdenk Alternatively, you can set it to a maximum upper 4571c609719bSwdenk address to use (U-Boot will still check that it 4572c609719bSwdenk does not overwrite the U-Boot stack and data). 4573c609719bSwdenk 4574c609719bSwdenk For instance, when you have a system with 16 MB 45757152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4576c609719bSwdenk you can do this by adding "mem=12M" to the value of 4577c609719bSwdenk the "bootargs" variable. However, now you must make 45787152b1d0Swdenk sure that the initrd image is placed in the first 4579c609719bSwdenk 12 MB as well - this can be done with 4580c609719bSwdenk 4581c609719bSwdenk setenv initrd_high 00c00000 4582c609719bSwdenk 458338b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 458438b99261Swdenk indication to U-Boot that all addresses are legal 458538b99261Swdenk for the Linux kernel, including addresses in flash 458638b99261Swdenk memory. In this case U-Boot will NOT COPY the 458738b99261Swdenk ramdisk at all. This may be useful to reduce the 458838b99261Swdenk boot time on your system, but requires that this 458938b99261Swdenk feature is supported by your Linux kernel. 459038b99261Swdenk 4591c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4592c609719bSwdenk 4593c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4594dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4595c609719bSwdenk 4596c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4597c609719bSwdenk 4598c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4599c609719bSwdenk 4600c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4601c609719bSwdenk 4602c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4603c609719bSwdenk 4604c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4605c609719bSwdenk 4606e2a53458SMike Frysinger ethprime - controls which interface is used first. 4607a3d991bdSwdenk 4608e2a53458SMike Frysinger ethact - controls which interface is currently active. 4609e2a53458SMike Frysinger For example you can do the following 4610a3d991bdSwdenk 461148690d80SHeiko Schocher => setenv ethact FEC 461248690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 461348690d80SHeiko Schocher => setenv ethact SCC 461448690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4615a3d991bdSwdenk 4616e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4617e1692577SMatthias Fuchs available network interfaces. 4618e1692577SMatthias Fuchs It just stays at the currently selected interface. 4619e1692577SMatthias Fuchs 4620a3d991bdSwdenk netretry - When set to "no" each network operation will 4621a3d991bdSwdenk either succeed or fail without retrying. 46226e592385Swdenk When set to "once" the network operation will 46236e592385Swdenk fail when all the available network interfaces 46246e592385Swdenk are tried once without success. 4625a3d991bdSwdenk Useful on scripts which control the retry operation 4626a3d991bdSwdenk themselves. 4627a3d991bdSwdenk 4628b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4629a1cf027aSJean-Christophe PLAGNIOL-VILLARD 463028cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4631ecb0ccd9SWolfgang Denk UDP source port. 4632ecb0ccd9SWolfgang Denk 463328cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 463428cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 463528cb9375SWolfgang Denk 4636c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4637c96f86eeSWolfgang Denk we use the TFTP server's default block size 4638c96f86eeSWolfgang Denk 4639c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4640c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4641c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4642c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4643c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4644c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4645c96f86eeSWolfgang Denk with unreliable TFTP servers. 4646c96f86eeSWolfgang Denk 4647a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 464811ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4649a3d991bdSwdenk VLAN tagged frames. 4650c609719bSwdenk 4651dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4652dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4653dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4654dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4655dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4656dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4657dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4658dc0b7b0eSJason Hobbs 4659dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4660dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4661dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4662dc0b7b0eSJason Hobbs 4663dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4664dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4665dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4666dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4667dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4668dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4669dc0b7b0eSJason Hobbs 4670c609719bSwdenkThe following environment variables may be used and automatically 4671c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4672c609719bSwdenkdepending the information provided by your boot server: 4673c609719bSwdenk 4674c609719bSwdenk bootfile - see above 4675c609719bSwdenk dnsip - IP address of your Domain Name Server 4676fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4677c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4678c609719bSwdenk hostname - Target hostname 4679c609719bSwdenk ipaddr - see above 4680c609719bSwdenk netmask - Subnet Mask 4681c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4682c609719bSwdenk serverip - see above 4683c609719bSwdenk 4684c609719bSwdenk 4685c609719bSwdenkThere are two special Environment Variables: 4686c609719bSwdenk 4687c609719bSwdenk serial# - contains hardware identification information such 4688c609719bSwdenk as type string and/or serial number 4689c609719bSwdenk ethaddr - Ethernet address 4690c609719bSwdenk 4691c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4692c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4693c609719bSwdenkonce they have been set once. 4694c609719bSwdenk 4695c609719bSwdenk 4696c1551ea8SstroeseFurther special Environment Variables: 4697c1551ea8Sstroese 4698c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4699c1551ea8Sstroese with the "version" command. This variable is 4700c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4701c1551ea8Sstroese 4702c1551ea8Sstroese 4703c609719bSwdenkPlease note that changes to some configuration parameters may take 4704c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4705c609719bSwdenk 4706c609719bSwdenk 4707170ab110SJoe HershbergerCallback functions for environment variables: 4708170ab110SJoe Hershberger--------------------------------------------- 4709170ab110SJoe Hershberger 4710170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4711170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 4712170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4713170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4714170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4715170ab110SJoe Hershberger 4716170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4717170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 4718170ab110SJoe Hershberger 4719170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 4720170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 4721170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 4722170ab110SJoe Hershbergerassociations. The list must be in the following format: 4723170ab110SJoe Hershberger 4724170ab110SJoe Hershberger entry = variable_name[:callback_name] 4725170ab110SJoe Hershberger list = entry[,list] 4726170ab110SJoe Hershberger 4727170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 4728170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 4729170ab110SJoe Hershberger 4730170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 4731170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 4732170ab110SJoe Hershbergeroverride any association in the static list. You can define 4733170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 4734170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 4735170ab110SJoe Hershberger 4736170ab110SJoe Hershberger 4737f07771ccSwdenkCommand Line Parsing: 4738f07771ccSwdenk===================== 4739f07771ccSwdenk 4740f07771ccSwdenkThere are two different command line parsers available with U-Boot: 47417152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4742f07771ccSwdenk 4743f07771ccSwdenkOld, simple command line parser: 4744f07771ccSwdenk-------------------------------- 4745f07771ccSwdenk 4746f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4747f07771ccSwdenk- several commands on one line, separated by ';' 4748fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4749f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4750f07771ccSwdenk for example: 4751fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4752f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4753f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4754f07771ccSwdenk 4755f07771ccSwdenkHush shell: 4756f07771ccSwdenk----------- 4757f07771ccSwdenk 4758f07771ccSwdenk- similar to Bourne shell, with control structures like 4759f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4760f07771ccSwdenk until...do...done, ... 4761f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4762f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4763f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4764f07771ccSwdenk command 4765f07771ccSwdenk 4766f07771ccSwdenkGeneral rules: 4767f07771ccSwdenk-------------- 4768f07771ccSwdenk 4769f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4770f07771ccSwdenk command) contains several commands separated by semicolon, and 4771f07771ccSwdenk one of these commands fails, then the remaining commands will be 4772f07771ccSwdenk executed anyway. 4773f07771ccSwdenk 4774f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 477511ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4776f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4777f07771ccSwdenk variables are not executed. 4778f07771ccSwdenk 4779c609719bSwdenkNote for Redundant Ethernet Interfaces: 4780c609719bSwdenk======================================= 4781c609719bSwdenk 478211ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4783c609719bSwdenksuch configurations and is capable of automatic selection of a 47847152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4785c609719bSwdenk 4786c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4787c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4788c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4789c609719bSwdenk 4790c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4791c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4792c609719bSwdenkding setting in the environment; if the corresponding environment 4793c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4794c609719bSwdenk 4795c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4796c609719bSwdenk environment, the SROM's address is used. 4797c609719bSwdenk 4798c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4799c609719bSwdenk environment exists, then the value from the environment variable is 4800c609719bSwdenk used. 4801c609719bSwdenk 4802c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4803c609719bSwdenk both addresses are the same, this MAC address is used. 4804c609719bSwdenk 4805c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4806c609719bSwdenk addresses differ, the value from the environment is used and a 4807c609719bSwdenk warning is printed. 4808c609719bSwdenk 4809c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4810c609719bSwdenk is raised. 4811c609719bSwdenk 4812ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4813ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4814ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4815ecee9324SBen WarrenThe naming convention is as follows: 4816ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4817c609719bSwdenk 4818c609719bSwdenkImage Formats: 4819c609719bSwdenk============== 4820c609719bSwdenk 48213310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 48223310c549SMarian Balakowiczimages in two formats: 48233310c549SMarian Balakowicz 48243310c549SMarian BalakowiczNew uImage format (FIT) 48253310c549SMarian Balakowicz----------------------- 48263310c549SMarian Balakowicz 48273310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 48283310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 48293310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 48303310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 48313310c549SMarian Balakowicz 48323310c549SMarian Balakowicz 48333310c549SMarian BalakowiczOld uImage format 48343310c549SMarian Balakowicz----------------- 48353310c549SMarian Balakowicz 48363310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 48373310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 48383310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4839c609719bSwdenk 4840c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4841c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4842f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4843f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4844f5ed9e39SPeter Tyser INTEGRITY). 48457b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4846afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4847afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4848c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4849c609719bSwdenk* Load Address 4850c609719bSwdenk* Entry Point 4851c609719bSwdenk* Image Name 4852c609719bSwdenk* Image Timestamp 4853c609719bSwdenk 4854c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4855c609719bSwdenkand the data portions of the image are secured against corruption by 4856c609719bSwdenkCRC32 checksums. 4857c609719bSwdenk 4858c609719bSwdenk 4859c609719bSwdenkLinux Support: 4860c609719bSwdenk============== 4861c609719bSwdenk 4862c609719bSwdenkAlthough U-Boot should support any OS or standalone application 48637152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4864c609719bSwdenkU-Boot. 4865c609719bSwdenk 4866c609719bSwdenkU-Boot includes many features that so far have been part of some 4867c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4868c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4869c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 48707152b1d0Swdenkserves several purposes: 4871c609719bSwdenk 4872c609719bSwdenk- the same features can be used for other OS or standalone 4873c609719bSwdenk applications (for instance: using compressed images to reduce the 4874c609719bSwdenk Flash memory footprint) 4875c609719bSwdenk 4876c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 48777152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4878c609719bSwdenk 4879c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4880c609719bSwdenk images; of course this also means that different kernel images can 4881c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4882c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4883c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4884c609719bSwdenk software is easier now. 4885c609719bSwdenk 4886c609719bSwdenk 4887c609719bSwdenkLinux HOWTO: 4888c609719bSwdenk============ 4889c609719bSwdenk 4890c609719bSwdenkPorting Linux to U-Boot based systems: 4891c609719bSwdenk--------------------------------------- 4892c609719bSwdenk 4893c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4894c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4895c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4896c609719bSwdenkLinux :-). 4897c609719bSwdenk 4898a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4899c609719bSwdenk 4900c609719bSwdenkJust make sure your machine specific header file (for instance 4901c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 49021dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 49031dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 49046d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4905c609719bSwdenk 4906c609719bSwdenk 4907c609719bSwdenkConfiguring the Linux kernel: 4908c609719bSwdenk----------------------------- 4909c609719bSwdenk 4910c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4911c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4912c609719bSwdenk 4913c609719bSwdenk 4914c609719bSwdenkBuilding a Linux Image: 4915c609719bSwdenk----------------------- 4916c609719bSwdenk 491724ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 491824ee89b9Swdenknot used. If you use recent kernel source, a new build target 491924ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 492024ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 492124ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 492224ee89b9Swdenk100% compatible format. 4923c609719bSwdenk 4924c609719bSwdenkExample: 4925c609719bSwdenk 4926c609719bSwdenk make TQM850L_config 4927c609719bSwdenk make oldconfig 4928c609719bSwdenk make dep 492924ee89b9Swdenk make uImage 4930c609719bSwdenk 493124ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 493224ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 493324ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4934c609719bSwdenk 493524ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 493624ee89b9Swdenk 493724ee89b9Swdenk* convert the kernel into a raw binary image: 493824ee89b9Swdenk 493924ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 494024ee89b9Swdenk -R .note -R .comment \ 494124ee89b9Swdenk -S vmlinux linux.bin 494224ee89b9Swdenk 494324ee89b9Swdenk* compress the binary image: 494424ee89b9Swdenk 494524ee89b9Swdenk gzip -9 linux.bin 494624ee89b9Swdenk 494724ee89b9Swdenk* package compressed binary image for U-Boot: 494824ee89b9Swdenk 494924ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 495024ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 495124ee89b9Swdenk -d linux.bin.gz uImage 495224ee89b9Swdenk 495324ee89b9Swdenk 495424ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 495524ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 495624ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 495724ee89b9Swdenkbyte header containing information about target architecture, 495824ee89b9Swdenkoperating system, image type, compression method, entry points, time 495924ee89b9Swdenkstamp, CRC32 checksums, etc. 496024ee89b9Swdenk 496124ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 496224ee89b9Swdenkprint the header information, or to build new images. 4963c609719bSwdenk 4964c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4965c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4966c609719bSwdenkchecksum verification: 4967c609719bSwdenk 4968c609719bSwdenk tools/mkimage -l image 4969c609719bSwdenk -l ==> list image header information 4970c609719bSwdenk 4971c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4972c609719bSwdenkfrom a "data file" which is used as image payload: 4973c609719bSwdenk 4974c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4975c609719bSwdenk -n name -d data_file image 4976c609719bSwdenk -A ==> set architecture to 'arch' 4977c609719bSwdenk -O ==> set operating system to 'os' 4978c609719bSwdenk -T ==> set image type to 'type' 4979c609719bSwdenk -C ==> set compression type 'comp' 4980c609719bSwdenk -a ==> set load address to 'addr' (hex) 4981c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4982c609719bSwdenk -n ==> set image name to 'name' 4983c609719bSwdenk -d ==> use image data from 'datafile' 4984c609719bSwdenk 498569459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 498669459791Swdenkaddress (0x00000000), but the entry point address depends on the 498769459791Swdenkkernel version: 4988c609719bSwdenk 4989c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 499024ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4991c609719bSwdenk 4992c609719bSwdenkSo a typical call to build a U-Boot image would read: 4993c609719bSwdenk 499424ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 499524ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4996a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 499724ee89b9Swdenk > examples/uImage.TQM850L 499824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4999c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5000c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5001c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5002c609719bSwdenk Load Address: 0x00000000 500324ee89b9Swdenk Entry Point: 0x00000000 5004c609719bSwdenk 5005c609719bSwdenkTo verify the contents of the image (or check for corruption): 5006c609719bSwdenk 500724ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 500824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5009c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5010c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5011c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5012c609719bSwdenk Load Address: 0x00000000 501324ee89b9Swdenk Entry Point: 0x00000000 5014c609719bSwdenk 5015c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5016c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5017c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5018c609719bSwdenkneed to be uncompressed: 5019c609719bSwdenk 5020a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 502124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 502224ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5023a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 502424ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 502524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5026c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5027c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5028c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5029c609719bSwdenk Load Address: 0x00000000 503024ee89b9Swdenk Entry Point: 0x00000000 5031c609719bSwdenk 5032c609719bSwdenk 5033c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5034c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5035c609719bSwdenk 5036c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5037c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5038c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5039c609719bSwdenk Image Name: Simple Ramdisk Image 5040c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5041c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5042c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5043c609719bSwdenk Load Address: 0x00000000 5044c609719bSwdenk Entry Point: 0x00000000 5045c609719bSwdenk 5046c609719bSwdenk 5047c609719bSwdenkInstalling a Linux Image: 5048c609719bSwdenk------------------------- 5049c609719bSwdenk 5050c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5051c609719bSwdenkyou must convert the image to S-Record format: 5052c609719bSwdenk 5053c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5054c609719bSwdenk 5055c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5056c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5057c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5058c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5059c609719bSwdenkcommand. 5060c609719bSwdenk 5061c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5062c609719bSwdenkTQM8xxL is in the first Flash bank): 5063c609719bSwdenk 5064c609719bSwdenk => erase 40100000 401FFFFF 5065c609719bSwdenk 5066c609719bSwdenk .......... done 5067c609719bSwdenk Erased 8 sectors 5068c609719bSwdenk 5069c609719bSwdenk => loads 40100000 5070c609719bSwdenk ## Ready for S-Record download ... 5071c609719bSwdenk ~>examples/image.srec 5072c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5073c609719bSwdenk ... 5074c609719bSwdenk 15989 15990 15991 15992 5075c609719bSwdenk [file transfer complete] 5076c609719bSwdenk [connected] 5077c609719bSwdenk ## Start Addr = 0x00000000 5078c609719bSwdenk 5079c609719bSwdenk 5080c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5081c609719bSwdenkthis includes a checksum verification so you can be sure no data 5082c609719bSwdenkcorruption happened: 5083c609719bSwdenk 5084c609719bSwdenk => imi 40100000 5085c609719bSwdenk 5086c609719bSwdenk ## Checking Image at 40100000 ... 5087c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5088c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5089c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5090c609719bSwdenk Load Address: 00000000 5091c609719bSwdenk Entry Point: 0000000c 5092c609719bSwdenk Verifying Checksum ... OK 5093c609719bSwdenk 5094c609719bSwdenk 5095c609719bSwdenkBoot Linux: 5096c609719bSwdenk----------- 5097c609719bSwdenk 5098c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5099c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5100c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5101c609719bSwdenkparameters. You can check and modify this variable using the 5102c609719bSwdenk"printenv" and "setenv" commands: 5103c609719bSwdenk 5104c609719bSwdenk 5105c609719bSwdenk => printenv bootargs 5106c609719bSwdenk bootargs=root=/dev/ram 5107c609719bSwdenk 5108c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5109c609719bSwdenk 5110c609719bSwdenk => printenv bootargs 5111c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5112c609719bSwdenk 5113c609719bSwdenk => bootm 40020000 5114c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5115c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5116c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5117c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5118c609719bSwdenk Load Address: 00000000 5119c609719bSwdenk Entry Point: 0000000c 5120c609719bSwdenk Verifying Checksum ... OK 5121c609719bSwdenk Uncompressing Kernel Image ... OK 5122c609719bSwdenk 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 5123c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5124c609719bSwdenk time_init: decrementer frequency = 187500000/60 5125c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5126c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5127c609719bSwdenk ... 5128c609719bSwdenk 512911ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 51307152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5131c609719bSwdenkformat!) to the "bootm" command: 5132c609719bSwdenk 5133c609719bSwdenk => imi 40100000 40200000 5134c609719bSwdenk 5135c609719bSwdenk ## Checking Image at 40100000 ... 5136c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5137c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5138c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5139c609719bSwdenk Load Address: 00000000 5140c609719bSwdenk Entry Point: 0000000c 5141c609719bSwdenk Verifying Checksum ... OK 5142c609719bSwdenk 5143c609719bSwdenk ## Checking Image at 40200000 ... 5144c609719bSwdenk Image Name: Simple Ramdisk Image 5145c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5146c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5147c609719bSwdenk Load Address: 00000000 5148c609719bSwdenk Entry Point: 00000000 5149c609719bSwdenk Verifying Checksum ... OK 5150c609719bSwdenk 5151c609719bSwdenk => bootm 40100000 40200000 5152c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5153c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5154c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5155c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5156c609719bSwdenk Load Address: 00000000 5157c609719bSwdenk Entry Point: 0000000c 5158c609719bSwdenk Verifying Checksum ... OK 5159c609719bSwdenk Uncompressing Kernel Image ... OK 5160c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5161c609719bSwdenk Image Name: Simple Ramdisk Image 5162c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5163c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5164c609719bSwdenk Load Address: 00000000 5165c609719bSwdenk Entry Point: 00000000 5166c609719bSwdenk Verifying Checksum ... OK 5167c609719bSwdenk Loading Ramdisk ... OK 5168c609719bSwdenk 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 5169c609719bSwdenk Boot arguments: root=/dev/ram 5170c609719bSwdenk time_init: decrementer frequency = 187500000/60 5171c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5172c609719bSwdenk ... 5173c609719bSwdenk RAMDISK: Compressed image found at block 0 5174c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5175c609719bSwdenk 5176c609719bSwdenk bash# 5177c609719bSwdenk 51780267768eSMatthew McClintockBoot Linux and pass a flat device tree: 51790267768eSMatthew McClintock----------- 51800267768eSMatthew McClintock 51810267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 51820267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 51830267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 51840267768eSMatthew McClintockflat device tree: 51850267768eSMatthew McClintock 51860267768eSMatthew McClintock=> print oftaddr 51870267768eSMatthew McClintockoftaddr=0x300000 51880267768eSMatthew McClintock=> print oft 51890267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 51900267768eSMatthew McClintock=> tftp $oftaddr $oft 51910267768eSMatthew McClintockSpeed: 1000, full duplex 51920267768eSMatthew McClintockUsing TSEC0 device 51930267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 51940267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 51950267768eSMatthew McClintockLoad address: 0x300000 51960267768eSMatthew McClintockLoading: # 51970267768eSMatthew McClintockdone 51980267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 51990267768eSMatthew McClintock=> tftp $loadaddr $bootfile 52000267768eSMatthew McClintockSpeed: 1000, full duplex 52010267768eSMatthew McClintockUsing TSEC0 device 52020267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 52030267768eSMatthew McClintockFilename 'uImage'. 52040267768eSMatthew McClintockLoad address: 0x200000 52050267768eSMatthew McClintockLoading:############ 52060267768eSMatthew McClintockdone 52070267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 52080267768eSMatthew McClintock=> print loadaddr 52090267768eSMatthew McClintockloadaddr=200000 52100267768eSMatthew McClintock=> print oftaddr 52110267768eSMatthew McClintockoftaddr=0x300000 52120267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 52130267768eSMatthew McClintock## Booting image at 00200000 ... 52140267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 52150267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 52160267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 52170267768eSMatthew McClintock Load Address: 00000000 52180267768eSMatthew McClintock Entry Point: 00000000 52190267768eSMatthew McClintock Verifying Checksum ... OK 52200267768eSMatthew McClintock Uncompressing Kernel Image ... OK 52210267768eSMatthew McClintockBooting using flat device tree at 0x300000 52220267768eSMatthew McClintockUsing MPC85xx ADS machine description 52230267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 52240267768eSMatthew McClintock[snip] 52250267768eSMatthew McClintock 52260267768eSMatthew McClintock 52276069ff26SwdenkMore About U-Boot Image Types: 52286069ff26Swdenk------------------------------ 52296069ff26Swdenk 52306069ff26SwdenkU-Boot supports the following image types: 52316069ff26Swdenk 52326069ff26Swdenk "Standalone Programs" are directly runnable in the environment 52336069ff26Swdenk provided by U-Boot; it is expected that (if they behave 52346069ff26Swdenk well) you can continue to work in U-Boot after return from 52356069ff26Swdenk the Standalone Program. 52366069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 52376069ff26Swdenk will take over control completely. Usually these programs 52386069ff26Swdenk will install their own set of exception handlers, device 52396069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 52406069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 52416069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 52426069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 52436069ff26Swdenk being started. 52446069ff26Swdenk "Multi-File Images" contain several images, typically an OS 52456069ff26Swdenk (Linux) kernel image and one or more data images like 52466069ff26Swdenk RAMDisks. This construct is useful for instance when you want 52476069ff26Swdenk to boot over the network using BOOTP etc., where the boot 52486069ff26Swdenk server provides just a single image file, but you want to get 52496069ff26Swdenk for instance an OS kernel and a RAMDisk image. 52506069ff26Swdenk 52516069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 52526069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 52536069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 52546069ff26Swdenk Immediately after the terminating 0 follow the images, one by 52556069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 52566069ff26Swdenk a multiple of 4 bytes). 52576069ff26Swdenk 52586069ff26Swdenk "Firmware Images" are binary images containing firmware (like 52596069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 52606069ff26Swdenk flash memory. 52616069ff26Swdenk 52626069ff26Swdenk "Script files" are command sequences that will be executed by 52636069ff26Swdenk U-Boot's command interpreter; this feature is especially 52646069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 52656069ff26Swdenk as command interpreter. 52666069ff26Swdenk 526744f074c7SMarek VasutBooting the Linux zImage: 526844f074c7SMarek Vasut------------------------- 526944f074c7SMarek Vasut 527044f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 527144f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 527244f074c7SMarek Vasutas the syntax of "bootm" command. 527344f074c7SMarek Vasut 52748ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5275017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5276017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5277017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5278017e1f3fSMarek Vasut 5279c609719bSwdenk 5280c609719bSwdenkStandalone HOWTO: 5281c609719bSwdenk================= 5282c609719bSwdenk 5283c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5284c609719bSwdenkrun "standalone" applications, which can use some resources of 5285c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5286c609719bSwdenk 5287c609719bSwdenkTwo simple examples are included with the sources: 5288c609719bSwdenk 5289c609719bSwdenk"Hello World" Demo: 5290c609719bSwdenk------------------- 5291c609719bSwdenk 5292c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5293c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5294c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5295c609719bSwdenklike that: 5296c609719bSwdenk 5297c609719bSwdenk => loads 5298c609719bSwdenk ## Ready for S-Record download ... 5299c609719bSwdenk ~>examples/hello_world.srec 5300c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5301c609719bSwdenk [file transfer complete] 5302c609719bSwdenk [connected] 5303c609719bSwdenk ## Start Addr = 0x00040004 5304c609719bSwdenk 5305c609719bSwdenk => go 40004 Hello World! This is a test. 5306c609719bSwdenk ## Starting application at 0x00040004 ... 5307c609719bSwdenk Hello World 5308c609719bSwdenk argc = 7 5309c609719bSwdenk argv[0] = "40004" 5310c609719bSwdenk argv[1] = "Hello" 5311c609719bSwdenk argv[2] = "World!" 5312c609719bSwdenk argv[3] = "This" 5313c609719bSwdenk argv[4] = "is" 5314c609719bSwdenk argv[5] = "a" 5315c609719bSwdenk argv[6] = "test." 5316c609719bSwdenk argv[7] = "<NULL>" 5317c609719bSwdenk Hit any key to exit ... 5318c609719bSwdenk 5319c609719bSwdenk ## Application terminated, rc = 0x0 5320c609719bSwdenk 5321c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5322c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5323c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5324c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5325c609719bSwdenkcharacter, but this is just a demo program. The application can be 5326c609719bSwdenkcontrolled by the following keys: 5327c609719bSwdenk 5328c609719bSwdenk ? - print current values og the CPM Timer registers 5329c609719bSwdenk b - enable interrupts and start timer 5330c609719bSwdenk e - stop timer and disable interrupts 5331c609719bSwdenk q - quit application 5332c609719bSwdenk 5333c609719bSwdenk => loads 5334c609719bSwdenk ## Ready for S-Record download ... 5335c609719bSwdenk ~>examples/timer.srec 5336c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5337c609719bSwdenk [file transfer complete] 5338c609719bSwdenk [connected] 5339c609719bSwdenk ## Start Addr = 0x00040004 5340c609719bSwdenk 5341c609719bSwdenk => go 40004 5342c609719bSwdenk ## Starting application at 0x00040004 ... 5343c609719bSwdenk TIMERS=0xfff00980 5344c609719bSwdenk Using timer 1 5345c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5346c609719bSwdenk 5347c609719bSwdenkHit 'b': 5348c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5349c609719bSwdenk Enabling timer 5350c609719bSwdenkHit '?': 5351c609719bSwdenk [q, b, e, ?] ........ 5352c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5353c609719bSwdenkHit '?': 5354c609719bSwdenk [q, b, e, ?] . 5355c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5356c609719bSwdenkHit '?': 5357c609719bSwdenk [q, b, e, ?] . 5358c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5359c609719bSwdenkHit '?': 5360c609719bSwdenk [q, b, e, ?] . 5361c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5362c609719bSwdenkHit 'e': 5363c609719bSwdenk [q, b, e, ?] ...Stopping timer 5364c609719bSwdenkHit 'q': 5365c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5366c609719bSwdenk 5367c609719bSwdenk 536885ec0bccSwdenkMinicom warning: 536985ec0bccSwdenk================ 537085ec0bccSwdenk 53717152b1d0SwdenkOver time, many people have reported problems when trying to use the 537285ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 537385ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5374f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 537585ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5376e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5377e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5378e53515a2SKarl O. Pincfor help with kermit. 5379e53515a2SKarl O. Pinc 538085ec0bccSwdenk 538152f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 538252f52c14Swdenkconfiguration to your "File transfer protocols" section: 538352f52c14Swdenk 538452f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 538552f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 538652f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 538752f52c14Swdenk 538852f52c14Swdenk 5389c609719bSwdenkNetBSD Notes: 5390c609719bSwdenk============= 5391c609719bSwdenk 5392c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5393c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5394c609719bSwdenk 5395c609719bSwdenkBuilding requires a cross environment; it is known to work on 5396c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5397c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5398c609719bSwdenkNote that the cross-powerpc package does not install include files; 5399c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5400c609719bSwdenkmissing. This file has to be installed and patched manually: 5401c609719bSwdenk 5402c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5403c609719bSwdenk # mkdir powerpc 5404c609719bSwdenk # ln -s powerpc machine 5405c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5406c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5407c609719bSwdenk 5408c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5409c609719bSwdenkand U-Boot include files. 5410c609719bSwdenk 5411c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5412c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5413c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5414c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 54152a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5416c609719bSwdenk 5417c609719bSwdenk 5418c609719bSwdenkImplementation Internals: 5419c609719bSwdenk========================= 5420c609719bSwdenk 5421c609719bSwdenkThe following is not intended to be a complete description of every 5422c609719bSwdenkimplementation detail. However, it should help to understand the 5423c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5424c609719bSwdenkhardware. 5425c609719bSwdenk 5426c609719bSwdenk 5427c609719bSwdenkInitial Stack, Global Data: 5428c609719bSwdenk--------------------------- 5429c609719bSwdenk 5430c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5431c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5432c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5433c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5434c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5435c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5436c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5437c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5438c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5439c609719bSwdenklocked as (mis-) used as memory, etc. 5440c609719bSwdenk 54417152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 54420668236bSWolfgang Denk U-Boot mailing list: 544343d9616cSwdenk 544443d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 544543d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 544643d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 544743d9616cSwdenk ... 544843d9616cSwdenk 544943d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 545043d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 545143d9616cSwdenk require any physical RAM backing up the cache. The cleverness 545243d9616cSwdenk is that the cache is being used as a temporary supply of 545343d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 545411ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 545543d9616cSwdenk can see how this works by studying the cache architecture and 545643d9616cSwdenk operation in the architecture and processor-specific manuals. 545743d9616cSwdenk 545843d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 545943d9616cSwdenk is another option for the system designer to use as an 546011ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 546143d9616cSwdenk option should work for you. Using CS 4 should be fine if your 546243d9616cSwdenk board designers haven't used it for something that would 546343d9616cSwdenk cause you grief during the initial boot! It is frequently not 546443d9616cSwdenk used. 546543d9616cSwdenk 54666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 546743d9616cSwdenk with your processor/board/system design. The default value 546843d9616cSwdenk you will find in any recent u-boot distribution in 54698a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 547043d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 547143d9616cSwdenk it above 400_0000. Just make sure your board has no resources 547243d9616cSwdenk that are supposed to respond to that address! That code in 547343d9616cSwdenk start.S has been around a while and should work as is when 547443d9616cSwdenk you get the config right. 547543d9616cSwdenk 547643d9616cSwdenk -Chris Hallinan 547743d9616cSwdenk DS4.COM, Inc. 547843d9616cSwdenk 5479c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5480c609719bSwdenkcode for the initialization procedures: 5481c609719bSwdenk 5482c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5483c609719bSwdenk to write it. 5484c609719bSwdenk 548511ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5486c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 54877152b1d0Swdenk zation is performed later (when relocating to RAM). 5488c609719bSwdenk 5489c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5490c609719bSwdenk that. 5491c609719bSwdenk 5492c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5493c609719bSwdenknormal global data to share information beween the code. But it 5494c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5495c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5496c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5497c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5498c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5499c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5500c609719bSwdenkreserve for this purpose. 5501c609719bSwdenk 55027152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5503c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5504c609719bSwdenkGCC's implementation. 5505c609719bSwdenk 5506c609719bSwdenkFor PowerPC, the following registers have specific use: 5507c609719bSwdenk R1: stack pointer 5508e7670f6cSWolfgang Denk R2: reserved for system use 5509c609719bSwdenk R3-R4: parameter passing and return values 5510c609719bSwdenk R5-R10: parameter passing 5511c609719bSwdenk R13: small data area pointer 5512c609719bSwdenk R30: GOT pointer 5513c609719bSwdenk R31: frame pointer 5514c609719bSwdenk 5515e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5516e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5517e6bee808SJoakim Tjernlund going back and forth between asm and C) 5518c609719bSwdenk 5519e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5520c609719bSwdenk 5521c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5522c609719bSwdenk address of the global data structure is known at compile time), 5523c609719bSwdenk but it turned out that reserving a register results in somewhat 5524c609719bSwdenk smaller code - although the code savings are not that big (on 5525c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5526c609719bSwdenk 624 text + 127 data). 5527c609719bSwdenk 5528c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 55294c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 55304c58eb55SMike Frysinger 5531c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 55324c58eb55SMike Frysinger 5533c609719bSwdenkOn ARM, the following registers are used: 5534c609719bSwdenk 5535c609719bSwdenk R0: function argument word/integer result 5536c609719bSwdenk R1-R3: function argument word 5537c609719bSwdenk R9: GOT pointer 5538c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 5539c609719bSwdenk R11: argument (frame) pointer 5540c609719bSwdenk R12: temporary workspace 5541c609719bSwdenk R13: stack pointer 5542c609719bSwdenk R14: link register 5543c609719bSwdenk R15: program counter 5544c609719bSwdenk 5545c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 5546c609719bSwdenk 55470df01fd3SThomas ChouOn Nios II, the ABI is documented here: 55480df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 55490df01fd3SThomas Chou 55500df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 55510df01fd3SThomas Chou 55520df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 55530df01fd3SThomas Chou to access small data sections, so gp is free. 55540df01fd3SThomas Chou 5555afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5556afc1ce82SMacpaul Lin 5557afc1ce82SMacpaul Lin R0-R1: argument/return 5558afc1ce82SMacpaul Lin R2-R5: argument 5559afc1ce82SMacpaul Lin R15: temporary register for assembler 5560afc1ce82SMacpaul Lin R16: trampoline register 5561afc1ce82SMacpaul Lin R28: frame pointer (FP) 5562afc1ce82SMacpaul Lin R29: global pointer (GP) 5563afc1ce82SMacpaul Lin R30: link register (LP) 5564afc1ce82SMacpaul Lin R31: stack pointer (SP) 5565afc1ce82SMacpaul Lin PC: program counter (PC) 5566afc1ce82SMacpaul Lin 5567afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5568afc1ce82SMacpaul Lin 5569d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5570d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5571c609719bSwdenk 5572c609719bSwdenkMemory Management: 5573c609719bSwdenk------------------ 5574c609719bSwdenk 5575c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5576c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5577c609719bSwdenk 5578c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5579c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5580c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5581c609719bSwdenkphysical memory banks. 5582c609719bSwdenk 5583c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5584c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5585c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5586c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 55876d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5588c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5589c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5590c609719bSwdenk 5591c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5592c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5593c609719bSwdenk 5594c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5595c609719bSwdenkthis: 5596c609719bSwdenk 5597c609719bSwdenk 0x0000 0000 Exception Vector code 5598c609719bSwdenk : 5599c609719bSwdenk 0x0000 1FFF 5600c609719bSwdenk 0x0000 2000 Free for Application Use 5601c609719bSwdenk : 5602c609719bSwdenk : 5603c609719bSwdenk 5604c609719bSwdenk : 5605c609719bSwdenk : 5606c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5607c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5608c609719bSwdenk 0x00FC 0000 Malloc Arena 5609c609719bSwdenk : 5610c609719bSwdenk 0x00FD FFFF 5611c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5612c609719bSwdenk ... eventually: LCD or video framebuffer 5613c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5614c609719bSwdenk 0x00FF FFFF [End of RAM] 5615c609719bSwdenk 5616c609719bSwdenk 5617c609719bSwdenkSystem Initialization: 5618c609719bSwdenk---------------------- 5619c609719bSwdenk 5620c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 562111ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5622c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 56237152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5624c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5625c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5626c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5627c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5628c609719bSwdenkthe caches and the SIU. 5629c609719bSwdenk 5630c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5631c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5632c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5633c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5634c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5635c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5636c609719bSwdenkbanks. 5637c609719bSwdenk 5638c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 56397152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5640c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5641c609719bSwdenk0x00000000, with any additional banks following immediately to create 5642c609719bSwdenkcontiguous memory starting from 0. 5643c609719bSwdenk 5644c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5645c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5646c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5647c609719bSwdenkpages, and the final stack is set up. 5648c609719bSwdenk 5649c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5650c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5651c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5652c609719bSwdenknew address in RAM. 5653c609719bSwdenk 5654c609719bSwdenk 5655c609719bSwdenkU-Boot Porting Guide: 5656c609719bSwdenk---------------------- 5657c609719bSwdenk 5658c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 56596aff3115Swdenklist, October 2002] 5660c609719bSwdenk 5661c609719bSwdenk 5662c609719bSwdenkint main(int argc, char *argv[]) 5663c609719bSwdenk{ 5664c609719bSwdenk sighandler_t no_more_time; 5665c609719bSwdenk 5666c609719bSwdenk signal(SIGALRM, no_more_time); 5667c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5668c609719bSwdenk 5669c609719bSwdenk if (available_money > available_manpower) { 56706c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5671c609719bSwdenk return 0; 5672c609719bSwdenk } 5673c609719bSwdenk 5674c609719bSwdenk Download latest U-Boot source; 5675c609719bSwdenk 56760668236bSWolfgang Denk Subscribe to u-boot mailing list; 56776aff3115Swdenk 56786c3fef28SJerry Van Baren if (clueless) 5679c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5680c609719bSwdenk 5681c609719bSwdenk while (learning) { 5682c609719bSwdenk Read the README file in the top level directory; 56837cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 56846c3fef28SJerry Van Baren Read applicable doc/*.README; 5685c609719bSwdenk Read the source, Luke; 56866c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5687c609719bSwdenk } 5688c609719bSwdenk 56896c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 56906c3fef28SJerry Van Baren Buy a BDI3000; 56916c3fef28SJerry Van Baren else 5692c609719bSwdenk Add a lot of aggravation and time; 5693c609719bSwdenk 56946c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 56956c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 56966c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 56976c3fef28SJerry Van Baren } else { 5698c609719bSwdenk Create your own board support subdirectory; 56996c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 57006c3fef28SJerry Van Baren } 57016c3fef28SJerry Van Baren Edit new board/<myboard> files 57026c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5703c609719bSwdenk 57046c3fef28SJerry Van Baren while (!accepted) { 5705c609719bSwdenk while (!running) { 5706c609719bSwdenk do { 5707c609719bSwdenk Add / modify source code; 5708c609719bSwdenk } until (compiles); 5709c609719bSwdenk Debug; 5710c609719bSwdenk if (clueless) 5711c609719bSwdenk email("Hi, I am having problems..."); 5712c609719bSwdenk } 57136c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 57146c3fef28SJerry Van Baren if (reasonable critiques) 57156c3fef28SJerry Van Baren Incorporate improvements from email list code review; 57166c3fef28SJerry Van Baren else 57176c3fef28SJerry Van Baren Defend code as written; 57186c3fef28SJerry Van Baren } 5719c609719bSwdenk 5720c609719bSwdenk return 0; 5721c609719bSwdenk} 5722c609719bSwdenk 5723c609719bSwdenkvoid no_more_time (int sig) 5724c609719bSwdenk{ 5725c609719bSwdenk hire_a_guru(); 5726c609719bSwdenk} 5727c609719bSwdenk 5728c609719bSwdenk 5729c609719bSwdenkCoding Standards: 5730c609719bSwdenk----------------- 5731c609719bSwdenk 5732c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 57332c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 57347ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5735c609719bSwdenk 57362c051651SDetlev ZundelSource files originating from a different project (for example the 57372c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 57382c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 57392c051651SDetlev Zundelsources. 57402c051651SDetlev Zundel 57412c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 57422c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 57432c051651SDetlev Zundelin your code. 5744c609719bSwdenk 5745c178d3daSwdenkPlease also stick to the following formatting rules: 5746180d3f74Swdenk- remove any trailing white space 57477ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5748180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 57497ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5750180d3f74Swdenk- do not add trailing empty lines to source files 5751180d3f74Swdenk 5752c609719bSwdenkSubmissions which do not conform to the standards may be returned 5753c609719bSwdenkwith a request to reformat the changes. 5754c609719bSwdenk 5755c609719bSwdenk 5756c609719bSwdenkSubmitting Patches: 5757c609719bSwdenk------------------- 5758c609719bSwdenk 5759c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5760c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5761c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5762c609719bSwdenk 57630d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5764218ca724SWolfgang Denk 57650668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 57660668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 57670668236bSWolfgang Denk 5768c609719bSwdenkWhen you send a patch, please include the following information with 5769c609719bSwdenkit: 5770c609719bSwdenk 5771c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5772c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5773c609719bSwdenk patch actually fixes something. 5774c609719bSwdenk 5775c609719bSwdenk* For new features: a description of the feature and your 5776c609719bSwdenk implementation. 5777c609719bSwdenk 5778c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5779c609719bSwdenk 5780c609719bSwdenk* For major contributions, your entry to the CREDITS file 5781c609719bSwdenk 5782c609719bSwdenk* When you add support for a new board, don't forget to add this 57837ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5784c609719bSwdenk 5785c609719bSwdenk* If your patch adds new configuration options, don't forget to 5786c609719bSwdenk document these in the README file. 5787c609719bSwdenk 5788218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5789218ca724SWolfgang Denk recommended) you can easily generate the patch using the 57907ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5791218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5792218ca724SWolfgang Denk with some other mail clients. 5793c609719bSwdenk 5794218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5795218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5796218ca724SWolfgang Denk GNU diff. 57976dff5529Swdenk 5798218ca724SWolfgang Denk The current directory when running this command shall be the parent 5799218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5800218ca724SWolfgang Denk your patch includes sufficient directory information for the 5801218ca724SWolfgang Denk affected files). 5802218ca724SWolfgang Denk 5803218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5804218ca724SWolfgang Denk and compressed attachments must not be used. 5805c609719bSwdenk 580652f52c14Swdenk* If one logical set of modifications affects or creates several 580752f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 580852f52c14Swdenk 580952f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 581052f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 581152f52c14Swdenk 581252f52c14Swdenk 5813c609719bSwdenkNotes: 5814c609719bSwdenk 5815c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5816c609719bSwdenk source tree and make sure that no errors or warnings are reported 5817c609719bSwdenk for any of the boards. 5818c609719bSwdenk 5819c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5820c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5821c609719bSwdenk returned with a request to re-formatting / split it. 5822c609719bSwdenk 5823c609719bSwdenk* If you modify existing code, make sure that your new code does not 5824c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5825c609719bSwdenk When adding new features, these should compile conditionally only 5826c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5827c609719bSwdenk disabled must not need more memory than the old code without your 5828c609719bSwdenk modification. 582990dc6704Swdenk 58300668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 58310668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 58320668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 58330668236bSWolfgang Denk bigger than the size limit should be avoided. 5834