1c609719bSwdenk# 2eca3aeb3SWolfgang Denk# (C) Copyright 2000 - 2013 3c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4c609719bSwdenk# 5eca3aeb3SWolfgang Denk# SPDX-License-Identifier: GPL-2.0+ 6c609719bSwdenk# 7c609719bSwdenk 8c609719bSwdenkSummary: 9c609719bSwdenk======== 10c609719bSwdenk 1124ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 12e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 13e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 14e86e5a07Swdenkinitialize and test the hardware or to download and run application 15e86e5a07Swdenkcode. 16c609719bSwdenk 17c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 1824ee89b9Swdenkthe source code originate in the Linux source tree, we have some 1924ee89b9Swdenkheader files in common, and special provision has been made to 20c609719bSwdenksupport booting of Linux images. 21c609719bSwdenk 22c609719bSwdenkSome attention has been paid to make this software easily 23c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 24c609719bSwdenkimplemented with the same call interface, so that it's very easy to 25c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 26c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 27c609719bSwdenkload and run it dynamically. 28c609719bSwdenk 29c609719bSwdenk 30c609719bSwdenkStatus: 31c609719bSwdenk======= 32c609719bSwdenk 33c609719bSwdenkIn general, all boards for which a configuration option exists in the 34c609719bSwdenkMakefile have been tested to some extent and can be considered 35c609719bSwdenk"working". In fact, many of them are used in production systems. 36c609719bSwdenk 37c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 3827af930eSAlbert ARIBAUDwho contributed the specific port. The boards.cfg file lists board 39218ca724SWolfgang Denkmaintainers. 40c609719bSwdenk 41adb9d851SRobert P. J. DayNote: There is no CHANGELOG file in the actual U-Boot source tree; 42adb9d851SRobert P. J. Dayit can be created dynamically from the Git log using: 43adb9d851SRobert P. J. Day 44adb9d851SRobert P. J. Day make CHANGELOG 45adb9d851SRobert P. J. Day 46c609719bSwdenk 47c609719bSwdenkWhere to get help: 48c609719bSwdenk================== 49c609719bSwdenk 50c609719bSwdenkIn case you have questions about, problems with or contributions for 51c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 520c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 530c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 540c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 550c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 56c609719bSwdenk 57c609719bSwdenk 58218ca724SWolfgang DenkWhere to get source code: 59218ca724SWolfgang Denk========================= 60218ca724SWolfgang Denk 61218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 62218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 63218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 64218ca724SWolfgang Denk 65218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 6611ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 67218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 68218ca724SWolfgang Denkdirectory. 69218ca724SWolfgang Denk 70d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 71218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 72218ca724SWolfgang Denk 73218ca724SWolfgang Denk 74c609719bSwdenkWhere we come from: 75c609719bSwdenk=================== 76c609719bSwdenk 77c609719bSwdenk- start from 8xxrom sources 7824ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 79c609719bSwdenk- clean up code 80c609719bSwdenk- make it easier to add custom boards 81c609719bSwdenk- make it possible to add other [PowerPC] CPUs 82c609719bSwdenk- extend functions, especially: 83c609719bSwdenk * Provide extended interface to Linux boot loader 84c609719bSwdenk * S-Record download 85c609719bSwdenk * network boot 8611ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 8724ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 88c609719bSwdenk- add other CPU families (starting with ARM) 8924ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 900d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 9124ee89b9Swdenk 9224ee89b9Swdenk 9324ee89b9SwdenkNames and Spelling: 9424ee89b9Swdenk=================== 9524ee89b9Swdenk 9624ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 9724ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 9824ee89b9Swdenkin source files etc.). Example: 9924ee89b9Swdenk 10024ee89b9Swdenk This is the README file for the U-Boot project. 10124ee89b9Swdenk 10224ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 10324ee89b9Swdenk 10424ee89b9Swdenk include/asm-ppc/u-boot.h 10524ee89b9Swdenk 10624ee89b9Swdenk #include <asm/u-boot.h> 10724ee89b9Swdenk 10824ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 10924ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 11024ee89b9Swdenk 11124ee89b9Swdenk U_BOOT_VERSION u_boot_logo 11224ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 113c609719bSwdenk 114c609719bSwdenk 11593f19cc0SwdenkVersioning: 11693f19cc0Swdenk=========== 11793f19cc0Swdenk 118360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 119360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 120360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 121360d883aSThomas Webernames consisting of the calendar year and month of the release date. 122360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 123360d883aSThomas Weberreleases in "stable" maintenance trees. 12493f19cc0Swdenk 125360d883aSThomas WeberExamples: 126360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 127360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 128360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 12993f19cc0Swdenk 13093f19cc0Swdenk 131c609719bSwdenkDirectory Hierarchy: 132c609719bSwdenk==================== 133c609719bSwdenk 1348d321b81SPeter Tyser/arch Architecture specific files 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 /arm926ejs Files specific to ARM 926 CPUs 1438d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1448d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1458d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1468d321b81SPeter Tyser /lib Architecture specific library files 1478d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1488d321b81SPeter Tyser /cpu CPU specific files 1498d321b81SPeter Tyser /lib Architecture specific library files 1508d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1518d321b81SPeter Tyser /cpu CPU specific files 1528d321b81SPeter Tyser /lib Architecture specific library files 1538d321b81SPeter Tyser /m68k Files generic to m68k architecture 1548d321b81SPeter Tyser /cpu CPU specific files 1558d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1568d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1578d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1588d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1598d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1608d321b81SPeter Tyser /lib Architecture specific library files 1618d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1628d321b81SPeter Tyser /cpu CPU specific files 1638d321b81SPeter Tyser /lib Architecture specific library files 1648d321b81SPeter Tyser /mips Files generic to MIPS architecture 1658d321b81SPeter Tyser /cpu CPU specific files 16692bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 16780421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 1688d321b81SPeter Tyser /lib Architecture specific library files 169afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 170afc1ce82SMacpaul Lin /cpu CPU specific files 171afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 172afc1ce82SMacpaul Lin /lib Architecture specific library files 1738d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1748d321b81SPeter Tyser /cpu CPU specific files 1758d321b81SPeter Tyser /lib Architecture specific library files 17633c7731bSRobert P. J. Day /openrisc Files generic to OpenRISC architecture 17733c7731bSRobert P. J. Day /cpu CPU specific files 17833c7731bSRobert P. J. Day /lib Architecture specific library files 179a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1808d321b81SPeter Tyser /cpu CPU specific files 1818d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1828d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1838d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1848d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1858d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 1868d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 1878d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 1888d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 1898d321b81SPeter Tyser /lib Architecture specific library files 1908d321b81SPeter Tyser /sh Files generic to SH architecture 1918d321b81SPeter Tyser /cpu CPU specific files 1928d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 1938d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 1948d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 1958d321b81SPeter Tyser /lib Architecture specific library files 1968d321b81SPeter Tyser /sparc Files generic to SPARC architecture 1978d321b81SPeter Tyser /cpu CPU specific files 1988d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 1998d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2008d321b81SPeter Tyser /lib Architecture specific library files 20133c7731bSRobert P. J. Day /x86 Files generic to x86 architecture 20233c7731bSRobert P. J. Day /cpu CPU specific files 20333c7731bSRobert P. J. Day /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 21033c7731bSRobert P. J. Day/dts Contains Makefile for building internal U-Boot fdt. 2118d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2128d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2138d321b81SPeter Tyser/include Header Files 2148d321b81SPeter Tyser/lib Files generic to all architectures 2158d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2168d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2178d321b81SPeter Tyser /lzo Library files to support LZO decompression 2188d321b81SPeter Tyser/net Networking code 2198d321b81SPeter Tyser/post Power On Self Test 22033c7731bSRobert P. J. Day/spl Secondary Program Loader framework 2218d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 222c609719bSwdenk 223c609719bSwdenkSoftware Configuration: 224c609719bSwdenk======================= 225c609719bSwdenk 226c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 227c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 228c609719bSwdenk 229c609719bSwdenkThere are two classes of configuration variables: 230c609719bSwdenk 231c609719bSwdenk* Configuration _OPTIONS_: 232c609719bSwdenk These are selectable by the user and have names beginning with 233c609719bSwdenk "CONFIG_". 234c609719bSwdenk 235c609719bSwdenk* Configuration _SETTINGS_: 236c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 237c609719bSwdenk you don't know what you're doing; they have names beginning with 2386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 239c609719bSwdenk 240c609719bSwdenkLater we will add a configuration tool - probably similar to or even 241c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 242c609719bSwdenkdo the configuration by hand, which means creating some symbolic 243c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 244c609719bSwdenkas an example here. 245c609719bSwdenk 246c609719bSwdenk 247c609719bSwdenkSelection of Processor Architecture and Board Type: 248c609719bSwdenk--------------------------------------------------- 249c609719bSwdenk 250c609719bSwdenkFor all supported boards there are ready-to-use default 251c609719bSwdenkconfigurations available; just type "make <board_name>_config". 252c609719bSwdenk 253c609719bSwdenkExample: For a TQM823L module type: 254c609719bSwdenk 255c609719bSwdenk cd u-boot 256c609719bSwdenk make TQM823L_config 257c609719bSwdenk 25811ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 259c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 260c609719bSwdenkdirectory according to the instructions in cogent/README. 261c609719bSwdenk 262c609719bSwdenk 263c609719bSwdenkConfiguration Options: 264c609719bSwdenk---------------------- 265c609719bSwdenk 266c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 267c609719bSwdenksuch information is kept in a configuration file 268c609719bSwdenk"include/configs/<board_name>.h". 269c609719bSwdenk 270c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 271c609719bSwdenk"include/configs/TQM823L.h". 272c609719bSwdenk 273c609719bSwdenk 2747f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2757f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2767f6c2cbcSwdenkbuild a config tool - later. 2777f6c2cbcSwdenk 2787f6c2cbcSwdenk 279c609719bSwdenkThe following options need to be configured: 280c609719bSwdenk 2812628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 282c609719bSwdenk 2832628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2846ccec449SWolfgang Denk 2856ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 28609ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 287c609719bSwdenk 288c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 289c609719bSwdenk Define exactly one of 290c609719bSwdenk CONFIG_CMA286_60_OLD 291c609719bSwdenk--- FIXME --- not tested yet: 292c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 293c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 294c609719bSwdenk 295c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 296c609719bSwdenk Define exactly one of 297c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 298c609719bSwdenk 299c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 300c609719bSwdenk Define one or more of 301c609719bSwdenk CONFIG_CMA302 302c609719bSwdenk 303c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 304c609719bSwdenk Define one or more of 305c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 30611ccc33fSMarcel Ziswiler the LCD display every second with 307c609719bSwdenk a "rotator" |\-/|\-/ 308c609719bSwdenk 3092535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3102535d602Swdenk CONFIG_ADSTYPE 3112535d602Swdenk Possible values are: 3126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3162535d602Swdenk 317cf946c6dSLei Wen- Marvell Family Member 318cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 319cf946c6dSLei Wen multiple fs option at one time 320cf946c6dSLei Wen for marvell soc family 321cf946c6dSLei Wen 322c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 323c609719bSwdenk Define exactly one of 324c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 325c609719bSwdenk 32611ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 32766ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 32866ca92a5Swdenk get_gclk_freq() cannot work 3295da627a4Swdenk e.g. if there is no 32KHz 3305da627a4Swdenk reference PIT/RTC clock 33166ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 33266ca92a5Swdenk or XTAL/EXTAL) 333c609719bSwdenk 33466ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 33766ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 33875d1ea7fSwdenk See doc/README.MPC866 33975d1ea7fSwdenk 3406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 34175d1ea7fSwdenk 34275d1ea7fSwdenk Define this to measure the actual CPU clock instead 34375d1ea7fSwdenk of relying on the correctness of the configured 34475d1ea7fSwdenk values. Mostly useful for board bringup to make sure 34575d1ea7fSwdenk the PLL is locked at the intended frequency. Note 34675d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 34875d1ea7fSwdenk 349506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 350506f3918SHeiko Schocher 351506f3918SHeiko Schocher Define this option if you want to enable the 352506f3918SHeiko Schocher ICache only when Code runs from RAM. 353506f3918SHeiko Schocher 35466412c63SKumar Gala- 85xx CPU Options: 355ffd06e02SYork Sun CONFIG_SYS_PPC64 356ffd06e02SYork Sun 357ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 358ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 359ffd06e02SYork Sun compliance, among other possible reasons. 360ffd06e02SYork Sun 36166412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36266412c63SKumar Gala 36366412c63SKumar Gala Defines the core time base clock divider ratio compared to the 36466412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 36566412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 36666412c63SKumar Gala 3678f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3688f29084aSKumar Gala 3698f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3708f29084aSKumar Gala tree nodes for the given platform. 3718f29084aSKumar Gala 372afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 373afa6b551SPrabhakar Kushwaha 374afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 375afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 376afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 377afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 378afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 379afa6b551SPrabhakar Kushwaha purpose. 380afa6b551SPrabhakar Kushwaha 38133eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 38233eee330SScott Wood 38333eee330SScott Wood Enables a workaround for erratum A004510. If set, 38433eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 38533eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 38633eee330SScott Wood 38733eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 38833eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 38933eee330SScott Wood 39033eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 39133eee330SScott Wood for which the A004510 workaround should be applied. 39233eee330SScott Wood 39333eee330SScott Wood The rest of SVR is either not relevant to the decision 39433eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 39533eee330SScott Wood p2041) or is implied by the build target, which controls 39633eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 39733eee330SScott Wood 39833eee330SScott Wood See Freescale App Note 4493 for more information about 39933eee330SScott Wood this erratum. 40033eee330SScott Wood 40174fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 40274fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 40374fa22edSPrabhakar Kushwaha requred during NOR boot. 40474fa22edSPrabhakar Kushwaha 40533eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 40633eee330SScott Wood 40733eee330SScott Wood This is the value to write into CCSR offset 0x18600 40833eee330SScott Wood according to the A004510 workaround. 40933eee330SScott Wood 41064501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 41164501c66SPriyanka Jain This value denotes start offset of DDR memory which is 41264501c66SPriyanka Jain connected exclusively to the DSP cores. 41364501c66SPriyanka Jain 414765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 415765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 416765b0bdbSPriyanka Jain which is directly connected to the DSP core. 417765b0bdbSPriyanka Jain 41864501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 41964501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 42064501c66SPriyanka Jain connected to the DSP core. 42164501c66SPriyanka Jain 422765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 423765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 424765b0bdbSPriyanka Jain 425b135991aSPriyanka Jain CONFIG_SYS_FSL_SINGLE_SOURCE_CLK 426b135991aSPriyanka Jain Single Source Clock is clocking mode present in some of FSL SoC's. 427b135991aSPriyanka Jain In this mode, a single differential clock is used to supply 428b135991aSPriyanka Jain clocks to the sysclock, ddrclock and usbclock. 429b135991aSPriyanka Jain 430fb4a2409SAneesh Bansal CONFIG_SYS_CPC_REINIT_F 431fb4a2409SAneesh Bansal This CONFIG is defined when the CPC is configured as SRAM at the 432fb4a2409SAneesh Bansal time of U-boot entry and is required to be re-initialized. 433fb4a2409SAneesh Bansal 434aade2004STang Yuantian CONFIG_DEEP_SLEEP 435aade2004STang Yuantian Inidcates this SoC supports deep sleep feature. If deep sleep is 436aade2004STang Yuantian supported, core will start to execute uboot when wakes up. 437aade2004STang Yuantian 4386cb461b4SDaniel Schwierzeck- Generic CPU options: 4396cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4406cb461b4SDaniel Schwierzeck 4416cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4426cb461b4SDaniel Schwierzeck values is arch specific. 4436cb461b4SDaniel Schwierzeck 4445614e71bSYork Sun CONFIG_SYS_FSL_DDR 4455614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4465614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4475614e71bSYork Sun SoCs. 4485614e71bSYork Sun 4495614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4505614e71bSYork Sun Freescale DDR memory-mapped register base. 4515614e71bSYork Sun 4525614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4535614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4545614e71bSYork Sun deskew training are not available. 4555614e71bSYork Sun 4565614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4575614e71bSYork Sun Freescale DDR1 controller. 4585614e71bSYork Sun 4595614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4605614e71bSYork Sun Freescale DDR2 controller. 4615614e71bSYork Sun 4625614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4635614e71bSYork Sun Freescale DDR3 controller. 4645614e71bSYork Sun 46534e026f9SYork Sun CONFIG_SYS_FSL_DDRC_GEN4 46634e026f9SYork Sun Freescale DDR4 controller. 46734e026f9SYork Sun 4689ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4699ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4709ac4ffbdSYork Sun 4715614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4725614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4735614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4745614e71bSYork Sun implemetation. 4755614e71bSYork Sun 4765614e71bSYork Sun CONFIG_SYS_FSL_DDR2 4775614e71bSYork Sun Board config to use DDR2. It can be eanbeld for SoCs with 4785614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 4795614e71bSYork Sun implementation. 4805614e71bSYork Sun 4815614e71bSYork Sun CONFIG_SYS_FSL_DDR3 4825614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 48334e026f9SYork Sun Freescale DDR3 or DDR3L controllers. 48434e026f9SYork Sun 48534e026f9SYork Sun CONFIG_SYS_FSL_DDR3L 48634e026f9SYork Sun Board config to use DDR3L. It can be enabled for SoCs with 48734e026f9SYork Sun DDR3L controllers. 48834e026f9SYork Sun 48934e026f9SYork Sun CONFIG_SYS_FSL_DDR4 49034e026f9SYork Sun Board config to use DDR4. It can be enabled for SoCs with 49134e026f9SYork Sun DDR4 controllers. 4925614e71bSYork Sun 4931b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 4941b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 4951b4175d6SPrabhakar Kushwaha 4961b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 4971b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 4981b4175d6SPrabhakar Kushwaha 499690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 500690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 501690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 502690e4258SPrabhakar Kushwaha 503690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 504690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 505690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 506690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 507690e4258SPrabhakar Kushwaha 508*89ad7be8SPrabhakar Kushwaha CONFIG_SPL_FSL_PBL 509*89ad7be8SPrabhakar Kushwaha It adds a target to create boot binary having SPL binary in PBI format 510*89ad7be8SPrabhakar Kushwaha concatenated with u-boot binary. 511*89ad7be8SPrabhakar Kushwaha 5124e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 5134e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 5144e5b1bd0SYork Sun 5154e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 5164e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 5174e5b1bd0SYork Sun 5186b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 5196b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 5206b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 5216b9e309aSYork Sun it could be different for ARM SoCs. 5226b9e309aSYork Sun 5236b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5246b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5256b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5266b1e1254SYork Sun SoCs with ARM core. 5276b1e1254SYork Sun 5280b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5300b953ffcSMarkus Klotzbuecher 5310b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5320b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5330b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5340b953ffcSMarkus Klotzbuecher 5356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5360b953ffcSMarkus Klotzbuecher 5370b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5380b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5390b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5400b953ffcSMarkus Klotzbuecher by this value. 5410b953ffcSMarkus Klotzbuecher 54292bbd64eSDaniel Schwierzeck- MIPS CPU options: 54392bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 54492bbd64eSDaniel Schwierzeck 54592bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 54692bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 54792bbd64eSDaniel Schwierzeck relocation. 54892bbd64eSDaniel Schwierzeck 54992bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 55092bbd64eSDaniel Schwierzeck 55192bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 55292bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 55392bbd64eSDaniel Schwierzeck Possible values are: 55492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 55592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 55692bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 55792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 55892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 55992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 56092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 56192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 56292bbd64eSDaniel Schwierzeck 56392bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 56492bbd64eSDaniel Schwierzeck 56592bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 56692bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 56792bbd64eSDaniel Schwierzeck 56892bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 56992bbd64eSDaniel Schwierzeck 57092bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 57192bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 57292bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 57392bbd64eSDaniel Schwierzeck 574b67d8816SChristian Riesch- ARM options: 575b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 576b67d8816SChristian Riesch 577b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 578b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 579b67d8816SChristian Riesch 5805356f545SAneesh V CONFIG_SYS_THUMB_BUILD 5815356f545SAneesh V 5825356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 5835356f545SAneesh V set for ARM architectures. Thumb instruction set provides 5845356f545SAneesh V better code density. For ARM architectures that support 5855356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 5865356f545SAneesh V GCC. 5875356f545SAneesh V 588c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 5890678587fSStephen Warren CONFIG_ARM_ERRATA_742230 5900678587fSStephen Warren CONFIG_ARM_ERRATA_743622 5910678587fSStephen Warren CONFIG_ARM_ERRATA_751472 592f71cbfe3SNitin Garg CONFIG_ARM_ERRATA_794072 593b7588e3bSNitin Garg CONFIG_ARM_ERRATA_761320 5940678587fSStephen Warren 5950678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 5960678587fSStephen Warren during U-Boot startup. Note that these options force the 5970678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 5980678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 5990678587fSStephen Warren set these options unless they apply! 6000678587fSStephen Warren 601795659dcSStephen Warren- CPU timer options: 602795659dcSStephen Warren CONFIG_SYS_HZ 603795659dcSStephen Warren 604795659dcSStephen Warren The frequency of the timer returned by get_timer(). 605795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 606795659dcSStephen Warren option must be set to 1000. 607795659dcSStephen Warren 6085da627a4Swdenk- Linux Kernel Interface: 609c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 610c609719bSwdenk 611c609719bSwdenk U-Boot stores all clock information in Hz 612c609719bSwdenk internally. For binary compatibility with older Linux 613c609719bSwdenk kernels (which expect the clocks passed in the 614c609719bSwdenk bd_info data to be in MHz) the environment variable 615c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 616c609719bSwdenk converts clock data to MHZ before passing it to the 617c609719bSwdenk Linux kernel. 618c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 619c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 620c609719bSwdenk default environment. 621c609719bSwdenk 6225da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6235da627a4Swdenk 62411ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6255da627a4Swdenk expect it to be in bytes, others in MB. 6265da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6275da627a4Swdenk 628fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 629f57f70aaSWolfgang Denk 630f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 631213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 632213bf8c8SGerald Van Baren concepts). 633213bf8c8SGerald Van Baren 634213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 635213bf8c8SGerald Van Baren * New libfdt-based support 636213bf8c8SGerald Van Baren * Adds the "fdt" command 6373bb342fcSKim Phillips * The bootm command automatically updates the fdt 638213bf8c8SGerald Van Baren 639b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 640b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 641b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 642b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 643f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 644c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 645f57f70aaSWolfgang Denk 64611ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 64711ccc33fSMarcel Ziswiler addresses 6483bb342fcSKim Phillips 6494e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6504e253137SKumar Gala 6514e253137SKumar Gala Board code has addition modification that it wants to make 6524e253137SKumar Gala to the flat device tree before handing it off to the kernel 6536705d81eSwdenk 6540267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6550267768eSMatthew McClintock 65611ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6570267768eSMatthew McClintock param header, the default value is zero if undefined. 6580267768eSMatthew McClintock 6593887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6603887c3fbSHeiko Schocher 6613887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6623887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6633887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6643887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6653887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6663887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6673887c3fbSHeiko Schocher 6687eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6697eb29398SIgor Grinberg 6707eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6717eb29398SIgor Grinberg machine type and must be used to specify the machine type 6727eb29398SIgor Grinberg number as it appears in the ARM machine registry 6737eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6747eb29398SIgor Grinberg Only boards that have multiple machine types supported 6757eb29398SIgor Grinberg in a single configuration file and the machine type is 6767eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6777eb29398SIgor Grinberg 6780b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6790b2f4ecaSNiklaus Giger 6800b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6810b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 6820b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6830b2f4ecaSNiklaus Giger 6840b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 6850b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 6860b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 6870b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 6880b2f4ecaSNiklaus Giger 6890b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 6900b2f4ecaSNiklaus Giger 6910b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 6920b2f4ecaSNiklaus Giger 6930b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 6940b2f4ecaSNiklaus Giger the defaults discussed just above. 6950b2f4ecaSNiklaus Giger 6962c451f78SAneesh V- Cache Configuration: 6972c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 6982c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 6992c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 7002c451f78SAneesh V 70193bc2193SAneesh V- Cache Configuration for ARM: 70293bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 70393bc2193SAneesh V controller 70493bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 70593bc2193SAneesh V controller register space 70693bc2193SAneesh V 7076705d81eSwdenk- Serial Ports: 70848d0192fSAndreas Engel CONFIG_PL010_SERIAL 7096705d81eSwdenk 7106705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 7116705d81eSwdenk 71248d0192fSAndreas Engel CONFIG_PL011_SERIAL 7136705d81eSwdenk 7146705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 7156705d81eSwdenk 7166705d81eSwdenk CONFIG_PL011_CLOCK 7176705d81eSwdenk 7186705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 7196705d81eSwdenk the clock speed of the UARTs. 7206705d81eSwdenk 7216705d81eSwdenk CONFIG_PL01x_PORTS 7226705d81eSwdenk 7236705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 7246705d81eSwdenk define this to a list of base addresses for each (supported) 7256705d81eSwdenk port. See e.g. include/configs/versatile.h 7266705d81eSwdenk 727910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 728910f1ae3SJohn Rigby 729910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 730910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 731910f1ae3SJohn Rigby this variable to initialize the extra register. 732910f1ae3SJohn Rigby 733910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 734910f1ae3SJohn Rigby 735910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 736910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 737910f1ae3SJohn Rigby variable to flush the UART at init time. 738910f1ae3SJohn Rigby 7396705d81eSwdenk 740c609719bSwdenk- Console Interface: 741c609719bSwdenk Depending on board, define exactly one serial port 742c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 743c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 744c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 745c609719bSwdenk 746c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 747c609719bSwdenk port routines must be defined elsewhere 748c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 749c609719bSwdenk 750c609719bSwdenk CONFIG_CFB_CONSOLE 751c609719bSwdenk Enables console device for a color framebuffer. Needs following 752c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 753c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 754c609719bSwdenk (default big endian) 755c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 756c609719bSwdenk rectangle fill 757c609719bSwdenk (cf. smiLynxEM) 758c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 759c609719bSwdenk bit-blit (cf. smiLynxEM) 760c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 761c609719bSwdenk (cols=pitch) 762c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 763c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 764c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 765c609719bSwdenk (0-5, cf. cfb_console.c) 766c609719bSwdenk VIDEO_FB_ADRS framebuffer address 767c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 768c609719bSwdenk (i.e. i8042_kbd_init()) 769c609719bSwdenk VIDEO_TSTC_FCT test char fct 770c609719bSwdenk (i.e. i8042_tstc) 771c609719bSwdenk VIDEO_GETC_FCT get char fct 772c609719bSwdenk (i.e. i8042_getc) 773c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 774c609719bSwdenk (requires blink timer 775c609719bSwdenk cf. i8042.c) 7766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 777c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 778c609719bSwdenk upper right corner 779602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 780c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 781c609719bSwdenk upper left corner 782a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 783a6c7ad2fSwdenk linux_logo.h for logo. 784a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 785c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 78611ccc33fSMarcel Ziswiler additional board info beside 787c609719bSwdenk the logo 788c609719bSwdenk 78933a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 79033a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 79133a35bbbSPali Rohár erase functions and limited graphics rendition control). 79233a35bbbSPali Rohár 793c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 794c609719bSwdenk default i/o. Serial console can be forced with 795c609719bSwdenk environment 'console=serial'. 796c609719bSwdenk 797a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 798a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 799a3ad8e26Swdenk the "silent" environment variable. See 800a3ad8e26Swdenk doc/README.silent for more information. 801a3ad8e26Swdenk 80245ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 80345ae2546SHeiko Schocher is 0x00. 80445ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 80545ae2546SHeiko Schocher is 0xa0. 80645ae2546SHeiko Schocher 807c609719bSwdenk- Console Baudrate: 808c609719bSwdenk CONFIG_BAUDRATE - in bps 809c609719bSwdenk Select one of the baudrates listed in 8106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 8116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 812c609719bSwdenk 813c92fac91SHeiko Schocher- Console Rx buffer length 814c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 815c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 8162b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 817c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 818c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 819c92fac91SHeiko Schocher the SMC. 820c92fac91SHeiko Schocher 8219558b48aSGraeme Russ- Pre-Console Buffer: 8229558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 8239558b48aSGraeme Russ initialised etc) all console output is silently discarded. 8249558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8259558b48aSGraeme Russ buffer any console messages prior to the console being 8269558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8279558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8289558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8299558b48aSGraeme Russ bytes are output before the console is initialised, the 8309558b48aSGraeme Russ earlier bytes are discarded. 8319558b48aSGraeme Russ 8329558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8339558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8349558b48aSGraeme Russ 835046a37bdSSonny Rao- Safe printf() functions 836046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 837046a37bdSSonny Rao the printf() functions. These are defined in 838046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 839046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 840046a37bdSSonny Rao If this option is not given then these functions will 841046a37bdSSonny Rao silently discard their buffer size argument - this means 842046a37bdSSonny Rao you are not getting any overflow checking in this case. 843046a37bdSSonny Rao 844c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 845c609719bSwdenk Delay before automatically booting the default image; 846c609719bSwdenk set to -1 to disable autoboot. 84793d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 84893d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 849c609719bSwdenk 850c609719bSwdenk See doc/README.autoboot for these options that 851c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 852c609719bSwdenk CONFIG_BOOT_RETRY_TIME 853c609719bSwdenk CONFIG_BOOT_RETRY_MIN 854c609719bSwdenk CONFIG_AUTOBOOT_KEYED 855c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 856c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 857c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 858c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 859c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 860c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 861c609719bSwdenk CONFIG_RESET_TO_RETRY 862c609719bSwdenk 863c609719bSwdenk- Autoboot Command: 864c609719bSwdenk CONFIG_BOOTCOMMAND 865c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 866c609719bSwdenk define a command string that is automatically executed 867c609719bSwdenk when no character is read on the console interface 868c609719bSwdenk within "Boot Delay" after reset. 869c609719bSwdenk 870c609719bSwdenk CONFIG_BOOTARGS 871c609719bSwdenk This can be used to pass arguments to the bootm 872c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 873c609719bSwdenk environment value "bootargs". 874c609719bSwdenk 875c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 876c609719bSwdenk The value of these goes into the environment as 877c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 878c609719bSwdenk as a convenience, when switching between booting from 87911ccc33fSMarcel Ziswiler RAM and NFS. 880c609719bSwdenk 881eda0ba38SHeiko Schocher- Bootcount: 882eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 883eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 884eda0ba38SHeiko Schocher cycle, see: 885eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 886eda0ba38SHeiko Schocher 887eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 888eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 889eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 890eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 891eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 892eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 893eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 894eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 895eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 896eda0ba38SHeiko Schocher 897c609719bSwdenk- Pre-Boot Commands: 898c609719bSwdenk CONFIG_PREBOOT 899c609719bSwdenk 900c609719bSwdenk When this option is #defined, the existence of the 901c609719bSwdenk environment variable "preboot" will be checked 902c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 903c609719bSwdenk countdown and/or running the auto-boot command resp. 904c609719bSwdenk entering interactive mode. 905c609719bSwdenk 906c609719bSwdenk This feature is especially useful when "preboot" is 907c609719bSwdenk automatically generated or modified. For an example 908c609719bSwdenk see the LWMON board specific code: here "preboot" is 909c609719bSwdenk modified when the user holds down a certain 910c609719bSwdenk combination of keys on the (special) keyboard when 911c609719bSwdenk booting the systems 912c609719bSwdenk 913c609719bSwdenk- Serial Download Echo Mode: 914c609719bSwdenk CONFIG_LOADS_ECHO 915c609719bSwdenk If defined to 1, all characters received during a 916c609719bSwdenk serial download (using the "loads" command) are 917c609719bSwdenk echoed back. This might be needed by some terminal 918c609719bSwdenk emulations (like "cu"), but may as well just take 919c609719bSwdenk time on others. This setting #define's the initial 920c609719bSwdenk value of the "loads_echo" environment variable. 921c609719bSwdenk 922602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 923c609719bSwdenk CONFIG_KGDB_BAUDRATE 924c609719bSwdenk Select one of the baudrates listed in 9256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 926c609719bSwdenk 927c609719bSwdenk- Monitor Functions: 928602ad3b3SJon Loeliger Monitor commands can be included or excluded 929602ad3b3SJon Loeliger from the build by using the #include files 930c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 931c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 932602ad3b3SJon Loeliger and augmenting with additional #define's 933602ad3b3SJon Loeliger for wanted commands. 934c609719bSwdenk 935602ad3b3SJon Loeliger The default command configuration includes all commands 936602ad3b3SJon Loeliger except those marked below with a "*". 937602ad3b3SJon Loeliger 938b401b73dSMarek Vasut CONFIG_CMD_AES AES 128 CBC encrypt/decrypt 939602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 940602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 941602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 942602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 943602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 944602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 945602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 94608d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 947602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 948710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 949602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 950602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 951602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 952a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 953a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 954a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 955a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 956602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 957602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 958246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 959602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 960602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9615e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 962fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 96388733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9640c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 96503e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 96603e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 96716f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 96816f4d933SStephen Warren that work for multiple fs types 969bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 970602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 97103e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 972602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 973602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9744d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 97553fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 976a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 977a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 978bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 979602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 980602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 981602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 982602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 9838fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 9844d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 985602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 9860c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 987c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 988602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 989602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 990602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 991602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 9924d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 993d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 994d22c338eSJoe Hershberger (169.254.*.*) 995602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 996602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 9974d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 99802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 99915a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1000602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1001a2681707SWolfgang Denk loop, loopw 10024d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1003602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1004602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1005602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 100668d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1007602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1008602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10094d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1010e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1011e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1012602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1013602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1014602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1015602ad3b3SJon Loeliger host 1016602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1017ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1018602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1019602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1020d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1021602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1022602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1023602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1024602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1025602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1026602ad3b3SJon Loeliger (4xx only) 1027f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10284d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 102902c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10307d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 103174de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1032602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10337a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10341fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1035da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1036da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1037602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1038602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1039c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10404d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 104189c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1042c609719bSwdenk 1043c609719bSwdenk EXAMPLE: If you want all functions except of network 1044c609719bSwdenk support you can write: 1045c609719bSwdenk 1046602ad3b3SJon Loeliger #include "config_cmd_all.h" 1047602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1048c609719bSwdenk 1049213bf8c8SGerald Van Baren Other Commands: 1050213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1051c609719bSwdenk 1052c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1053602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1054c609719bSwdenk what you (and your U-Boot users) are doing. Data 1055c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1056c609719bSwdenk 8260 (where accesses to the IMMR region must be 1057c609719bSwdenk uncached), and it cannot be disabled on all other 1058c609719bSwdenk systems where we (mis-) use the data cache to hold an 1059c609719bSwdenk initial stack and some data. 1060c609719bSwdenk 1061c609719bSwdenk 1062c609719bSwdenk XXX - this list needs to get updated! 1063c609719bSwdenk 1064a5ecbe62SWolfgang Denk- Regular expression support: 1065a5ecbe62SWolfgang Denk CONFIG_REGEX 1066a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1067a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1068a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1069a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1070a5ecbe62SWolfgang Denk 107145ba8077SSimon Glass- Device tree: 107245ba8077SSimon Glass CONFIG_OF_CONTROL 107345ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 107445ba8077SSimon Glass to configure its devices, instead of relying on statically 107545ba8077SSimon Glass compiled #defines in the board file. This option is 107645ba8077SSimon Glass experimental and only available on a few boards. The device 107745ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 107845ba8077SSimon Glass 10792c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10802c0f79e4SSimon Glass be done using one of the two options below: 1081bbb0b128SSimon Glass 1082bbb0b128SSimon Glass CONFIG_OF_EMBED 1083bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1084bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1085bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1086bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1087bbb0b128SSimon Glass the global data structure as gd->blob. 108845ba8077SSimon Glass 10892c0f79e4SSimon Glass CONFIG_OF_SEPARATE 10902c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 10912c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 10922c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 10932c0f79e4SSimon Glass 10942c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 10952c0f79e4SSimon Glass 10962c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 10972c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 10982c0f79e4SSimon Glass still use the individual files if you need something more 10992c0f79e4SSimon Glass exotic. 11002c0f79e4SSimon Glass 1101c609719bSwdenk- Watchdog: 1102c609719bSwdenk CONFIG_WATCHDOG 1103c609719bSwdenk If this variable is defined, it enables watchdog 11046abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11056abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11066abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11076abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11086abe6fb6SDetlev Zundel available, then no further board specific code should 11096abe6fb6SDetlev Zundel be needed to use it. 11106abe6fb6SDetlev Zundel 11116abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11126abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11136abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11146abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1115c609719bSwdenk 1116c1551ea8Sstroese- U-Boot Version: 1117c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1118c1551ea8Sstroese If this variable is defined, an environment variable 1119c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1120c1551ea8Sstroese version as printed by the "version" command. 1121a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1122a1ea8e51SBenoît Thébaudeau next reset. 1123c1551ea8Sstroese 1124c609719bSwdenk- Real-Time Clock: 1125c609719bSwdenk 1126602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1127c609719bSwdenk has to be selected, too. Define exactly one of the 1128c609719bSwdenk following options: 1129c609719bSwdenk 1130c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1131c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11324e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1133c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11341cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1135c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11367f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 11373bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11389536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11394c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 114171d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 114271d19f30SHeiko Schocher RV3029 RTC. 1143c609719bSwdenk 1144b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1145b37c7e5eSwdenk must also be configured. See I2C Support, below. 1146b37c7e5eSwdenk 1147e92739d3SPeter Tyser- GPIO Support: 1148e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1149e92739d3SPeter Tyser 11505dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11515dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11525dec49caSChris Packham pins supported by a particular chip. 11535dec49caSChris Packham 1154e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1155e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1156e92739d3SPeter Tyser 1157c609719bSwdenk- Timestamp Support: 1158c609719bSwdenk 1159c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1160c609719bSwdenk (date and time) of an image is printed by image 1161c609719bSwdenk commands like bootm or iminfo. This option is 1162602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1163c609719bSwdenk 1164923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1165923c46f9SKarl O. Pinc Zero or more of the following: 1166923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1167923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1168923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1169923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1170923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1171923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1172923c46f9SKarl O. Pinc disk/part_efi.c 1173923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1174c609719bSwdenk 1175602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1176218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1177923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1178c609719bSwdenk 1179c609719bSwdenk- IDE Reset method: 11804d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 11814d13cbadSwdenk board configurations files but used nowhere! 1182c609719bSwdenk 11834d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 11844d13cbadSwdenk be performed by calling the function 11854d13cbadSwdenk ide_set_reset(int reset) 11864d13cbadSwdenk which has to be defined in a board specific file 1187c609719bSwdenk 1188c609719bSwdenk- ATAPI Support: 1189c609719bSwdenk CONFIG_ATAPI 1190c609719bSwdenk 1191c609719bSwdenk Set this to enable ATAPI support. 1192c609719bSwdenk 1193c40b2956Swdenk- LBA48 Support 1194c40b2956Swdenk CONFIG_LBA48 1195c40b2956Swdenk 1196c40b2956Swdenk Set this to enable support for disks larger than 137GB 11974b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1198c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1199c40b2956Swdenk support disks up to 2.1TB. 1200c40b2956Swdenk 12016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1202c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1203c40b2956Swdenk Default is 32bit. 1204c40b2956Swdenk 1205c609719bSwdenk- SCSI Support: 1206c609719bSwdenk At the moment only there is only support for the 1207c609719bSwdenk SYM53C8XX SCSI controller; define 1208c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1209c609719bSwdenk 12106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1213c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1214c609719bSwdenk devices. 12156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1216c609719bSwdenk 1217447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1218447c031bSStefan Reinauer SCSI devices found during the last scan. 1219447c031bSStefan Reinauer 1220c609719bSwdenk- NETWORK Support (PCI): 1221682011ffSwdenk CONFIG_E1000 1222ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1223ce5207e1SKyle Moffett 1224ce5207e1SKyle Moffett CONFIG_E1000_SPI 1225ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1226ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1227ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1228ce5207e1SKyle Moffett 1229ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1230ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1231ce5207e1SKyle Moffett example with the "sspi" command. 1232ce5207e1SKyle Moffett 1233ce5207e1SKyle Moffett CONFIG_CMD_E1000 1234ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1235ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1236682011ffSwdenk 1237ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 123811ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1239ac3315c2SAndre Schwarz 1240c609719bSwdenk CONFIG_EEPRO100 1241c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 124211ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1243c609719bSwdenk write routine for first time initialisation. 1244c609719bSwdenk 1245c609719bSwdenk CONFIG_TULIP 1246c609719bSwdenk Support for Digital 2114x chips. 1247c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1248c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1249c609719bSwdenk 1250c609719bSwdenk CONFIG_NATSEMI 1251c609719bSwdenk Support for National dp83815 chips. 1252c609719bSwdenk 1253c609719bSwdenk CONFIG_NS8382X 1254c609719bSwdenk Support for National dp8382[01] gigabit chips. 1255c609719bSwdenk 125645219c46Swdenk- NETWORK Support (other): 125745219c46Swdenk 1258c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1259c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1260c041e9d2SJens Scharsig 1261c041e9d2SJens Scharsig CONFIG_RMII 1262c041e9d2SJens Scharsig Define this to use reduced MII inteface 1263c041e9d2SJens Scharsig 1264c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1265c041e9d2SJens Scharsig If this defined, the driver is quiet. 1266c041e9d2SJens Scharsig The driver doen't show link status messages. 1267c041e9d2SJens Scharsig 1268efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1269efdd7319SRob Herring Support for the Calxeda XGMAC device 1270efdd7319SRob Herring 12713bb46d23SAshok CONFIG_LAN91C96 127245219c46Swdenk Support for SMSC's LAN91C96 chips. 127345219c46Swdenk 127445219c46Swdenk CONFIG_LAN91C96_BASE 127545219c46Swdenk Define this to hold the physical address 127645219c46Swdenk of the LAN91C96's I/O space 127745219c46Swdenk 127845219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 127945219c46Swdenk Define this to enable 32 bit addressing 128045219c46Swdenk 12813bb46d23SAshok CONFIG_SMC91111 1282f39748aeSwdenk Support for SMSC's LAN91C111 chip 1283f39748aeSwdenk 1284f39748aeSwdenk CONFIG_SMC91111_BASE 1285f39748aeSwdenk Define this to hold the physical address 1286f39748aeSwdenk of the device (I/O space) 1287f39748aeSwdenk 1288f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1289f39748aeSwdenk Define this if data bus is 32 bits 1290f39748aeSwdenk 1291f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1292f39748aeSwdenk Define this to use i/o functions instead of macros 1293f39748aeSwdenk (some hardware wont work with macros) 1294f39748aeSwdenk 1295dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1296dc02badaSHeiko Schocher Support for davinci emac 1297dc02badaSHeiko Schocher 1298dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1299dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1300dc02badaSHeiko Schocher 1301b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1302b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1303b3dbf4a5SMacpaul Lin 1304b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1305b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1306b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1307b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1308b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1309b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1310b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1311b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1312b3dbf4a5SMacpaul Lin 1313c2fff331SMike Rapoport CONFIG_SMC911X 1314557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1315557b377dSJens Gehrlein 1316c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1317557b377dSJens Gehrlein Define this to hold the physical address 1318557b377dSJens Gehrlein of the device (I/O space) 1319557b377dSJens Gehrlein 1320c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1321557b377dSJens Gehrlein Define this if data bus is 32 bits 1322557b377dSJens Gehrlein 1323c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1324557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1325557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1326c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1327557b377dSJens Gehrlein 13283d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13293d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13303d0075faSYoshihiro Shimoda 13313d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13323d0075faSYoshihiro Shimoda Define the number of ports to be used 13333d0075faSYoshihiro Shimoda 13343d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13353d0075faSYoshihiro Shimoda Define the ETH PHY's address 13363d0075faSYoshihiro Shimoda 133768260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 133868260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 133968260aabSYoshihiro Shimoda 13405e124724SVadim Bendebury- TPM Support: 134190899cc0SChe-liang Chiou CONFIG_TPM 134290899cc0SChe-liang Chiou Support TPM devices. 134390899cc0SChe-liang Chiou 13441b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13451b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13461b393db5STom Wai-Hong Tam per system is supported at this time. 13471b393db5STom Wai-Hong Tam 13481b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13491b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13501b393db5STom Wai-Hong Tam 13511b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13521b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13531b393db5STom Wai-Hong Tam 13541b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13551b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13561b393db5STom Wai-Hong Tam 1357c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1358c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1359c01939c7SDirk Eibach 136090899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 13615e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 13625e124724SVadim Bendebury per system is supported at this time. 13635e124724SVadim Bendebury 13645e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 13655e124724SVadim Bendebury Base address where the generic TPM device is mapped 13665e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 13675e124724SVadim Bendebury 0xfed40000. 13685e124724SVadim Bendebury 1369be6c1529SReinhard Pfau CONFIG_CMD_TPM 1370be6c1529SReinhard Pfau Add tpm monitor functions. 1371be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1372be6c1529SReinhard Pfau provides monitor access to authorized functions. 1373be6c1529SReinhard Pfau 1374be6c1529SReinhard Pfau CONFIG_TPM 1375be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1376be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1377be6c1529SReinhard Pfau Requires support for a TPM device. 1378be6c1529SReinhard Pfau 1379be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1380be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1381be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1382be6c1529SReinhard Pfau 1383c609719bSwdenk- USB Support: 1384c609719bSwdenk At the moment only the UHCI host controller is 13854d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1386c609719bSwdenk CONFIG_USB_UHCI to enable it. 1387c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 138830d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1389c609719bSwdenk storage devices. 1390c609719bSwdenk Note: 1391c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1392c609719bSwdenk (TEAC FD-05PUB). 13934d13cbadSwdenk MPC5200 USB requires additional defines: 13944d13cbadSwdenk CONFIG_USB_CLOCK 13954d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1396307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1397307ecb6dSEric Millbrandt for USB on PSC3 13984d13cbadSwdenk CONFIG_USB_CONFIG 13994d13cbadSwdenk for differential drivers: 0x00001000 14004d13cbadSwdenk for single ended drivers: 0x00005000 1401307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1402307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1404fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1405fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14064d13cbadSwdenk 14079ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14089ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14099ab4ce22SSimon Glass 1410aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1411aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1412aa155058SKuo-Jung Su 141316c8d5e7SWolfgang Denk- USB Device: 141416c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 141516c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 141616c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 141711ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 141816c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 141916c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 142016c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 142116c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 142216c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 142316c8d5e7SWolfgang Denk a Linux host by 142416c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 142516c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 142616c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 142716c8d5e7SWolfgang Denk might be defined in YourBoardName.h 142816c8d5e7SWolfgang Denk 142916c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 143016c8d5e7SWolfgang Denk Define this to build a UDC device 143116c8d5e7SWolfgang Denk 143216c8d5e7SWolfgang Denk CONFIG_USB_TTY 143316c8d5e7SWolfgang Denk Define this to have a tty type of device available to 143416c8d5e7SWolfgang Denk talk to the UDC device 143516c8d5e7SWolfgang Denk 1436f9da0f89SVipin KUMAR CONFIG_USBD_HS 1437f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1438f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1439f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1440f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1441f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1442f9da0f89SVipin KUMAR speed. 1443f9da0f89SVipin KUMAR 14446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 144516c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 144616c8d5e7SWolfgang Denk be set to usbtty. 144716c8d5e7SWolfgang Denk 144816c8d5e7SWolfgang Denk mpc8xx: 14496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 145016c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 145216c8d5e7SWolfgang Denk 14536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 145416c8d5e7SWolfgang Denk Derive USB clock from brgclk 14556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 145616c8d5e7SWolfgang Denk 145716c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 145816c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 145916c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 146016c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 146116c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 146216c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 146316c8d5e7SWolfgang Denk 146416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 146516c8d5e7SWolfgang Denk Define this string as the name of your company for 146616c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 146716c8d5e7SWolfgang Denk 146816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 146916c8d5e7SWolfgang Denk Define this string as the name of your product 147016c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 147116c8d5e7SWolfgang Denk 147216c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 147316c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 147416c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 147516c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 147616c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 147716c8d5e7SWolfgang Denk 147816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 147916c8d5e7SWolfgang Denk Define this as the unique Product ID 148016c8d5e7SWolfgang Denk for your device 148116c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1482c609719bSwdenk 1483351e9b20SPrzemyslaw Marczak Some USB device drivers may need to check USB cable attachment. 1484351e9b20SPrzemyslaw Marczak In this case you can enable following config in BoardName.h: 1485351e9b20SPrzemyslaw Marczak CONFIG_USB_CABLE_CHECK 1486351e9b20SPrzemyslaw Marczak This enables function definition: 1487351e9b20SPrzemyslaw Marczak - usb_cable_connected() in include/usb.h 1488351e9b20SPrzemyslaw Marczak Implementation of this function is board-specific. 1489351e9b20SPrzemyslaw Marczak 1490d70a560fSIgor Grinberg- ULPI Layer Support: 1491d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1492d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1493d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1494d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1495d70a560fSIgor Grinberg viewport is supported. 1496d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1497d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 14986d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 14996d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 15006d365ea0SLucas Stach the appropriate value in Hz. 1501c609719bSwdenk 1502c609719bSwdenk- MMC Support: 1503c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1504c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1505c609719bSwdenk accessed from the boot prompt by mapping the device 1506c609719bSwdenk to physical memory similar to flash. Command line is 1507602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1508602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1509c609719bSwdenk 1510afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1511afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1512afb35666SYoshihiro Shimoda 1513afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1514afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1515afb35666SYoshihiro Shimoda 1516afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1517afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1518afb35666SYoshihiro Shimoda 1519b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1520b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1521b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1522b3ba6e94STom Rini 1523b3ba6e94STom Rini CONFIG_CMD_DFU 1524b3ba6e94STom Rini This enables the command "dfu" which is used to have 1525b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1526b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1527b3ba6e94STom Rini set and define the alt settings to expose to the host. 1528b3ba6e94STom Rini 1529b3ba6e94STom Rini CONFIG_DFU_MMC 1530b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1531b3ba6e94STom Rini 1532c6631764SPantelis Antoniou CONFIG_DFU_NAND 1533c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1534c6631764SPantelis Antoniou 1535a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1536a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1537a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1538a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1539a9479f04SAfzal Mohammed one that would help mostly the developer. 1540a9479f04SAfzal Mohammed 1541e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1542e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1543e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1544e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1545e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1546e7e75c70SHeiko Schocher 1547ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1548ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1549ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1550ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1551ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1552ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1553ea2453d5SPantelis Antoniou 1554001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1555001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1556001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1557001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1558001a8319SHeiko Schocher 1559001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1560001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1561001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1562001a8319SHeiko Schocher sending again an USB request to the device. 1563001a8319SHeiko Schocher 15646705d81eSwdenk- Journaling Flash filesystem support: 15656705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 15666705d81eSwdenk CONFIG_JFFS2_NAND_DEV 15676705d81eSwdenk Define these for a default partition on a NAND device 15686705d81eSwdenk 15696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 15706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 15716705d81eSwdenk Define these for a default partition on a NOR device 15726705d81eSwdenk 15736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 15746705d81eSwdenk Define this to create an own partition. You have to provide a 15756705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 15766705d81eSwdenk 15776705d81eSwdenk If you define only one JFFS2 partition you may also want to 15786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 15796705d81eSwdenk to disable the command chpart. This is the default when you 15806705d81eSwdenk have not defined a custom partition 15816705d81eSwdenk 1582c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1583c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1584656f4c65SDonggeun Kim 1585656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1586656f4c65SDonggeun Kim file in FAT formatted partition. 1587656f4c65SDonggeun Kim 1588656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1589656f4c65SDonggeun Kim user to write files to FAT. 1590c30a15e5SDonggeun Kim 159184cd9327SGabe BlackCBFS (Coreboot Filesystem) support 159284cd9327SGabe Black CONFIG_CMD_CBFS 159384cd9327SGabe Black 159484cd9327SGabe Black Define this to enable support for reading from a Coreboot 159584cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 159684cd9327SGabe Black and cbfsload. 159784cd9327SGabe Black 1598c609719bSwdenk- Keyboard Support: 1599c609719bSwdenk CONFIG_ISA_KEYBOARD 1600c609719bSwdenk 1601c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1602c609719bSwdenk support 1603c609719bSwdenk 1604c609719bSwdenk CONFIG_I8042_KBD 1605c609719bSwdenk Standard PC keyboard driver with US (is default) and 1606c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1607c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1608c609719bSwdenk for cfb_console. Supports cursor blinking. 1609c609719bSwdenk 1610713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1611713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1612713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1613713cb680SHung-ying Tyan which provides key scans on request. 1614713cb680SHung-ying Tyan 1615c609719bSwdenk- Video support: 1616c609719bSwdenk CONFIG_VIDEO 1617c609719bSwdenk 1618c609719bSwdenk Define this to enable video support (for output to 1619c609719bSwdenk video). 1620c609719bSwdenk 1621c609719bSwdenk CONFIG_VIDEO_CT69000 1622c609719bSwdenk 1623c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1624c609719bSwdenk 1625c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1626eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1627eeb1b77bSwdenk video output is selected via environment 'videoout' 1628eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1629eeb1b77bSwdenk assumed. 1630c609719bSwdenk 1631eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 163211ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1633eeb1b77bSwdenk are possible: 1634eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1635eeb1b77bSwdenk Following standard modes are supported (* is default): 1636eeb1b77bSwdenk 1637eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1638eeb1b77bSwdenk -------------+--------------------------------------------- 1639eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1640eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1641eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1642eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1643eeb1b77bSwdenk -------------+--------------------------------------------- 1644c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1645c609719bSwdenk 1646eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 16477817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1648eeb1b77bSwdenk 1649eeb1b77bSwdenk 1650a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1651a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1652a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1653a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1654a6c7ad2fSwdenk 16557d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 16567d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 16577d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 16587d3053fbSTimur Tabi support, and should also define these other macros: 16597d3053fbSTimur Tabi 16607d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 16617d3053fbSTimur Tabi CONFIG_VIDEO 16627d3053fbSTimur Tabi CONFIG_CMD_BMP 16637d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 16647d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 16657d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 16667d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 16677d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 16687d3053fbSTimur Tabi 1669ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1670ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1671ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1672ba8e76bdSTimur Tabi description of this variable. 16737d3053fbSTimur Tabi 1674058d59b0SSimon Glass CONFIG_VIDEO_VGA 1675058d59b0SSimon Glass 1676058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1677058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1678058d59b0SSimon Glass driver. 1679058d59b0SSimon Glass 1680058d59b0SSimon Glass 1681682011ffSwdenk- Keyboard Support: 1682682011ffSwdenk CONFIG_KEYBOARD 1683682011ffSwdenk 1684682011ffSwdenk Define this to enable a custom keyboard support. 1685682011ffSwdenk This simply calls drv_keyboard_init() which must be 1686682011ffSwdenk defined in your board-specific files. 1687682011ffSwdenk The only board using this so far is RBC823. 1688a6c7ad2fSwdenk 1689c609719bSwdenk- LCD Support: CONFIG_LCD 1690c609719bSwdenk 1691c609719bSwdenk Define this to enable LCD support (for output to LCD 1692c609719bSwdenk display); also select one of the supported displays 1693c609719bSwdenk by defining one of these: 1694c609719bSwdenk 169539cf4804SStelian Pop CONFIG_ATMEL_LCD: 169639cf4804SStelian Pop 169739cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 169839cf4804SStelian Pop 1699fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1700c609719bSwdenk 1701fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1702c609719bSwdenk 1703fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1704c609719bSwdenk 1705fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1706fd3103bbSwdenk Active, color, single scan. 1707fd3103bbSwdenk 1708fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1709fd3103bbSwdenk 1710fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1711c609719bSwdenk Active, color, single scan. 1712c609719bSwdenk 1713c609719bSwdenk CONFIG_SHARP_16x9 1714c609719bSwdenk 1715c609719bSwdenk Sharp 320x240. Active, color, single scan. 1716c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1717c609719bSwdenk 1718c609719bSwdenk CONFIG_SHARP_LQ64D341 1719c609719bSwdenk 1720c609719bSwdenk Sharp LQ64D341 display, 640x480. 1721c609719bSwdenk Active, color, single scan. 1722c609719bSwdenk 1723c609719bSwdenk CONFIG_HLD1045 1724c609719bSwdenk 1725c609719bSwdenk HLD1045 display, 640x480. 1726c609719bSwdenk Active, color, single scan. 1727c609719bSwdenk 1728c609719bSwdenk CONFIG_OPTREX_BW 1729c609719bSwdenk 1730c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1731c609719bSwdenk or 1732c609719bSwdenk Hitachi LMG6912RPFC-00T 1733c609719bSwdenk or 1734c609719bSwdenk Hitachi SP14Q002 1735c609719bSwdenk 1736c609719bSwdenk 320x240. Black & white. 1737c609719bSwdenk 1738c609719bSwdenk Normally display is black on white background; define 17396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1740c609719bSwdenk 1741676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1742676d319eSSimon Glass 1743676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1744676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1745676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1746676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1747676d319eSSimon Glass a per-section basis. 1748676d319eSSimon Glass 17490d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 17500d89efefSSimon Glass 17510d89efefSSimon Glass When the console need to be scrolled, this is the number of 17520d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 17530d89efefSSimon Glass the console jump but can help speed up operation when scrolling 17540d89efefSSimon Glass is slow. 1755676d319eSSimon Glass 175645d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 175745d7f525STom Wai-Hong Tam 175845d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 175945d7f525STom Wai-Hong Tam 1760735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1761735987c5STom Wai-Hong Tam 1762735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1763735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1764735987c5STom Wai-Hong Tam 17657152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1766d791b1dcSwdenk 1767d791b1dcSwdenk If this option is set, the environment is checked for 1768d791b1dcSwdenk a variable "splashimage". If found, the usual display 1769d791b1dcSwdenk of logo, copyright and system information on the LCD 1770e94d2cd9Swdenk is suppressed and the BMP image at the address 1771d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1772d791b1dcSwdenk console is redirected to the "nulldev", too. This 1773d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1774d791b1dcSwdenk loaded very quickly after power-on. 1775d791b1dcSwdenk 1776c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1777c0880485SNikita Kiryanov 1778c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1779c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 17801551df35STom Rini (see README.displaying-bmps). 1781c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1782c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1783c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1784c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1785c0880485SNikita Kiryanov there is no need to set this option. 1786c0880485SNikita Kiryanov 17871ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 17881ca298ceSMatthias Weisser 17891ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 17901ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 17911ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 17921ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 17931ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 17941ca298ceSMatthias Weisser specify 'm' for centering the image. 17951ca298ceSMatthias Weisser 17961ca298ceSMatthias Weisser Example: 17971ca298ceSMatthias Weisser setenv splashpos m,m 17981ca298ceSMatthias Weisser => image at center of screen 17991ca298ceSMatthias Weisser 18001ca298ceSMatthias Weisser setenv splashpos 30,20 18011ca298ceSMatthias Weisser => image at x = 30 and y = 20 18021ca298ceSMatthias Weisser 18031ca298ceSMatthias Weisser setenv splashpos -10,m 18041ca298ceSMatthias Weisser => vertically centered image 18051ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 18061ca298ceSMatthias Weisser 180798f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 180898f4a3dfSStefan Roese 180998f4a3dfSStefan Roese If this option is set, additionally to standard BMP 181098f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 181198f4a3dfSStefan Roese splashscreen support or the bmp command. 181298f4a3dfSStefan Roese 1813d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1814d5011762SAnatolij Gustschin 1815d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1816d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1817d5011762SAnatolij Gustschin bmp command. 1818d5011762SAnatolij Gustschin 1819f2b96dfbSLei Wen- Do compresssing for memory range: 1820f2b96dfbSLei Wen CONFIG_CMD_ZIP 1821f2b96dfbSLei Wen 1822f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1823f2b96dfbSLei Wen to compress the specified memory at its best effort. 1824f2b96dfbSLei Wen 1825c29fdfc1Swdenk- Compression support: 18268ef70478SKees Cook CONFIG_GZIP 18278ef70478SKees Cook 18288ef70478SKees Cook Enabled by default to support gzip compressed images. 18298ef70478SKees Cook 1830c29fdfc1Swdenk CONFIG_BZIP2 1831c29fdfc1Swdenk 1832c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1833c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1834c29fdfc1Swdenk compressed images are supported. 1835c29fdfc1Swdenk 1836c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 18376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1838c29fdfc1Swdenk be at least 4MB. 1839d791b1dcSwdenk 1840fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1841fc9c1727SLuigi 'Comio' Mantellini 1842fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1843fc9c1727SLuigi 'Comio' Mantellini images is included. 1844fc9c1727SLuigi 'Comio' Mantellini 1845fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1846fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1847fc9c1727SLuigi 'Comio' Mantellini formula: 1848fc9c1727SLuigi 'Comio' Mantellini 1849fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1850fc9c1727SLuigi 'Comio' Mantellini 1851fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1852fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1853fc9c1727SLuigi 'Comio' Mantellini 1854fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1855fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1856fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1857fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1858fc9c1727SLuigi 'Comio' Mantellini 1859fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1860fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 18616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1862fc9c1727SLuigi 'Comio' Mantellini 18638ef70478SKees Cook CONFIG_LZO 18648ef70478SKees Cook 18658ef70478SKees Cook If this option is set, support for LZO compressed images 18668ef70478SKees Cook is included. 18678ef70478SKees Cook 186817ea1177Swdenk- MII/PHY support: 186917ea1177Swdenk CONFIG_PHY_ADDR 187017ea1177Swdenk 187117ea1177Swdenk The address of PHY on MII bus. 187217ea1177Swdenk 187317ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 187417ea1177Swdenk 187517ea1177Swdenk The clock frequency of the MII bus 187617ea1177Swdenk 187717ea1177Swdenk CONFIG_PHY_GIGE 187817ea1177Swdenk 187917ea1177Swdenk If this option is set, support for speed/duplex 188011ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 188117ea1177Swdenk 188217ea1177Swdenk CONFIG_PHY_RESET_DELAY 188317ea1177Swdenk 188417ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 188517ea1177Swdenk reset before any MII register access is possible. 188617ea1177Swdenk For such PHY, set this option to the usec delay 188717ea1177Swdenk required. (minimum 300usec for LXT971A) 188817ea1177Swdenk 188917ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 189017ea1177Swdenk 189117ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 189217ea1177Swdenk command issued before MII status register can be read 189317ea1177Swdenk 1894c609719bSwdenk- Ethernet address: 1895c609719bSwdenk CONFIG_ETHADDR 1896c68a05feSrichardretanubun CONFIG_ETH1ADDR 1897c609719bSwdenk CONFIG_ETH2ADDR 1898c609719bSwdenk CONFIG_ETH3ADDR 1899c68a05feSrichardretanubun CONFIG_ETH4ADDR 1900c68a05feSrichardretanubun CONFIG_ETH5ADDR 1901c609719bSwdenk 190211ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 190311ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1904c609719bSwdenk is not determined automatically. 1905c609719bSwdenk 1906c609719bSwdenk- IP address: 1907c609719bSwdenk CONFIG_IPADDR 1908c609719bSwdenk 1909c609719bSwdenk Define a default value for the IP address to use for 191011ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1911c609719bSwdenk determined through e.g. bootp. 19121ebcd654SWolfgang Denk (Environment variable "ipaddr") 1913c609719bSwdenk 1914c609719bSwdenk- Server IP address: 1915c609719bSwdenk CONFIG_SERVERIP 1916c609719bSwdenk 1917c609719bSwdenk Defines a default value for the IP address of a TFTP 1918c609719bSwdenk server to contact when using the "tftboot" command. 19191ebcd654SWolfgang Denk (Environment variable "serverip") 1920c609719bSwdenk 192197cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 192297cfe861SRobin Getz 192397cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 192497cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 192597cfe861SRobin Getz 19261ebcd654SWolfgang Denk- Gateway IP address: 19271ebcd654SWolfgang Denk CONFIG_GATEWAYIP 19281ebcd654SWolfgang Denk 19291ebcd654SWolfgang Denk Defines a default value for the IP address of the 19301ebcd654SWolfgang Denk default router where packets to other networks are 19311ebcd654SWolfgang Denk sent to. 19321ebcd654SWolfgang Denk (Environment variable "gatewayip") 19331ebcd654SWolfgang Denk 19341ebcd654SWolfgang Denk- Subnet mask: 19351ebcd654SWolfgang Denk CONFIG_NETMASK 19361ebcd654SWolfgang Denk 19371ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 19381ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 19391ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 19401ebcd654SWolfgang Denk forwarded through a router. 19411ebcd654SWolfgang Denk (Environment variable "netmask") 19421ebcd654SWolfgang Denk 194353a5c424SDavid Updegraff- Multicast TFTP Mode: 194453a5c424SDavid Updegraff CONFIG_MCAST_TFTP 194553a5c424SDavid Updegraff 194653a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 194753a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 194811ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 194953a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 195053a5c424SDavid Updegraff multicast group. 195153a5c424SDavid Updegraff 1952c609719bSwdenk- BOOTP Recovery Mode: 1953c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1954c609719bSwdenk 1955c609719bSwdenk If you have many targets in a network that try to 1956c609719bSwdenk boot using BOOTP, you may want to avoid that all 1957c609719bSwdenk systems send out BOOTP requests at precisely the same 1958c609719bSwdenk moment (which would happen for instance at recovery 1959c609719bSwdenk from a power failure, when all systems will try to 1960c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1961c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1962c609719bSwdenk inserted before sending out BOOTP requests. The 19636c33c785SWolfgang Denk following delays are inserted then: 1964c609719bSwdenk 1965c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1966c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1967c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1968c609719bSwdenk 4th and following 1969c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1970c609719bSwdenk 1971fe389a82Sstroese- DHCP Advanced Options: 19721fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 19731fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1974fe389a82Sstroese 19751fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 19761fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 19771fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 19781fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 19791fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 19801fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 19811fe80d79SJon Loeliger CONFIG_BOOTP_DNS 19821fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 19831fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 19841fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 19851fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 19861fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 19872c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1988fe389a82Sstroese 19895d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 19905d110f0aSWilson Callan environment variable, not the BOOTP server. 1991fe389a82Sstroese 19922c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 19932c00e099SJoe Hershberger after the configured retry count, the call will fail 19942c00e099SJoe Hershberger instead of starting over. This can be used to fail over 19952c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 19962c00e099SJoe Hershberger is not available. 19972c00e099SJoe Hershberger 1998fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1999fe389a82Sstroese serverip from a DHCP server, it is possible that more 2000fe389a82Sstroese than one DNS serverip is offered to the client. 2001fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2002fe389a82Sstroese serverip will be stored in the additional environment 2003fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2004fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 20051fe80d79SJon Loeliger is defined. 2006fe389a82Sstroese 2007fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2008fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2009fe389a82Sstroese need the hostname of the DHCP requester. 20105d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 20111fe80d79SJon Loeliger of the "hostname" environment variable is passed as 20121fe80d79SJon Loeliger option 12 to the DHCP server. 2013fe389a82Sstroese 2014d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2015d9a2f416SAras Vaichas 2016d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2017d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2018d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2019d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2020d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2021d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2022d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2023d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2024d9a2f416SAras Vaichas that one of the retries will be successful but note that 2025d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2026d9a2f416SAras Vaichas this delay. 2027d9a2f416SAras Vaichas 2028d22c338eSJoe Hershberger - Link-local IP address negotiation: 2029d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2030d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2031d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2032d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2033d22c338eSJoe Hershberger 2034d22c338eSJoe Hershberger See doc/README.link-local for more information. 2035d22c338eSJoe Hershberger 2036a3d991bdSwdenk - CDP Options: 2037a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2038a3d991bdSwdenk 2039a3d991bdSwdenk The device id used in CDP trigger frames. 2040a3d991bdSwdenk 2041a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2042a3d991bdSwdenk 2043a3d991bdSwdenk A two character string which is prefixed to the MAC address 2044a3d991bdSwdenk of the device. 2045a3d991bdSwdenk 2046a3d991bdSwdenk CONFIG_CDP_PORT_ID 2047a3d991bdSwdenk 2048a3d991bdSwdenk A printf format string which contains the ascii name of 2049a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 205011ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2051a3d991bdSwdenk 2052a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2053a3d991bdSwdenk 2054a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2055a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2056a3d991bdSwdenk 2057a3d991bdSwdenk CONFIG_CDP_VERSION 2058a3d991bdSwdenk 2059a3d991bdSwdenk An ascii string containing the version of the software. 2060a3d991bdSwdenk 2061a3d991bdSwdenk CONFIG_CDP_PLATFORM 2062a3d991bdSwdenk 2063a3d991bdSwdenk An ascii string containing the name of the platform. 2064a3d991bdSwdenk 2065a3d991bdSwdenk CONFIG_CDP_TRIGGER 2066a3d991bdSwdenk 2067a3d991bdSwdenk A 32bit integer sent on the trigger. 2068a3d991bdSwdenk 2069a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2070a3d991bdSwdenk 2071a3d991bdSwdenk A 16bit integer containing the power consumption of the 2072a3d991bdSwdenk device in .1 of milliwatts. 2073a3d991bdSwdenk 2074a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2075a3d991bdSwdenk 2076a3d991bdSwdenk A byte containing the id of the VLAN. 2077a3d991bdSwdenk 2078c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2079c609719bSwdenk 2080c609719bSwdenk Several configurations allow to display the current 2081c609719bSwdenk status using a LED. For instance, the LED will blink 2082c609719bSwdenk fast while running U-Boot code, stop blinking as 2083c609719bSwdenk soon as a reply to a BOOTP request was received, and 2084c609719bSwdenk start blinking slow once the Linux kernel is running 2085c609719bSwdenk (supported by a status LED driver in the Linux 2086c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2087c609719bSwdenk feature in U-Boot. 2088c609719bSwdenk 20891df7bbbaSIgor Grinberg Additional options: 20901df7bbbaSIgor Grinberg 20911df7bbbaSIgor Grinberg CONFIG_GPIO_LED 20921df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 20931df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 20941df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 20951df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 20961df7bbbaSIgor Grinberg 20979dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 20989dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 20999dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 21009dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 21019dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 21029dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 21039dfdcdfeSIgor Grinberg 2104c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2105c609719bSwdenk 2106c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2107c609719bSwdenk on those systems that support this (optional) 2108c609719bSwdenk feature, like the TQM8xxL modules. 2109c609719bSwdenk 21103f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2111c609719bSwdenk 21123f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 21133f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 21143f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 21153f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 21163f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 21173f4978c7SHeiko Schocher interface. 21183f4978c7SHeiko Schocher 21193f4978c7SHeiko Schocher ported i2c driver to the new framework: 2120ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2121ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2122ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2123ea818dbbSHeiko Schocher for defining speed and slave address 2124ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2125ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2126ea818dbbSHeiko Schocher for defining speed and slave address 2127ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2128ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2129ea818dbbSHeiko Schocher for defining speed and slave address 2130ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2131ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2132ea818dbbSHeiko Schocher for defining speed and slave address 21333f4978c7SHeiko Schocher 213400f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 213500f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 213600f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 213700f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 213800f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 213900f792e0SHeiko Schocher bus. 214000f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 214100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 214200f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 214300f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 214400f792e0SHeiko Schocher second bus. 214500f792e0SHeiko Schocher 21461f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 21471f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 21481f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 21491f2ba722SSimon Glass 100000 and the slave addr 0! 21501f2ba722SSimon Glass 2151880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2152880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2153880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2154880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2155880540deSDirk Eibach 2156fac96408Strem - drivers/i2c/i2c_mxc.c 2157fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2158fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2159fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2160fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2161fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2162fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2163fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2164fac96408Strem If thoses defines are not set, default value is 100000 2165fac96408Strem for speed, and 0 for slave. 2166fac96408Strem 21671086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 21681086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 21691086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 21701086bfa9SNobuhiro Iwamatsu 21711086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 21721086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 21731086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 21741086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 21751086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 21761086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 21771086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 21781086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 21791086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 21801086bfa9SNobuhiro Iwamatsu 21812035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 21822035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 21832035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 21842035d77dSNobuhiro Iwamatsu 21852035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 21862035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 21872035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 21882035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 21892035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 21902035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 21912035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 21922035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 21932035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 21942035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 21952035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 21962035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 21972035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 21982035d77dSNobuhiro Iwamatsu 21996789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 22006789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 22016789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 22026789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 22036789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 22046789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 22056789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 22066789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 22076789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 22086789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 22096789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 22106789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 22116789e84eSHeiko Schocher 22120bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 22130bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 22140bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 22150bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 22160bdffe71SHeiko Schocher 2217e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2218e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2219e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2220e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2221e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2222e717fc6dSNaveen Krishna Ch 22233f4978c7SHeiko Schocher additional defines: 22243f4978c7SHeiko Schocher 22253f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 22263f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 22273f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 22283f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 22293f4978c7SHeiko Schocher omit this define. 22303f4978c7SHeiko Schocher 22313f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 22323f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 22333f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 22343f4978c7SHeiko Schocher omit this define. 22353f4978c7SHeiko Schocher 22363f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 22373f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 22383f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 22393f4978c7SHeiko Schocher define. 22403f4978c7SHeiko Schocher 22413f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 22423f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 22433f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 22443f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 22453f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 22463f4978c7SHeiko Schocher 22473f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 22483f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 22493f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 22503f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 22513f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 22523f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 22533f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 22543f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 22553f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 22563f4978c7SHeiko Schocher } 22573f4978c7SHeiko Schocher 22583f4978c7SHeiko Schocher which defines 22593f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2260ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2261ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2262ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2263ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2264ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 22653f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2266ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2267ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 22683f4978c7SHeiko Schocher 22693f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 22703f4978c7SHeiko Schocher 2271ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 22723f4978c7SHeiko Schocher 22733f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 22743f4978c7SHeiko Schocher provides the following compelling advantages: 22753f4978c7SHeiko Schocher 22763f4978c7SHeiko Schocher - more than one i2c adapter is usable 22773f4978c7SHeiko Schocher - approved multibus support 22783f4978c7SHeiko Schocher - better i2c mux support 22793f4978c7SHeiko Schocher 22803f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 22813f4978c7SHeiko Schocher 2282ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2283ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2284ea818dbbSHeiko Schocher for the selected CPU. 2285c609719bSwdenk 2286b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2287602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2288b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2289b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2290c609719bSwdenk command line interface. 2291c609719bSwdenk 2292bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2293c609719bSwdenk 2294b37c7e5eSwdenk There are several other quantities that must also be 2295ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2296c609719bSwdenk 22976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2298b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 22996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 230011ccc33fSMarcel Ziswiler the CPU's i2c node address). 2301c609719bSwdenk 23028d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2303a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 23048d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 23058d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 23068d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2307b37c7e5eSwdenk 23085da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 23095da71efaSEric Millbrandt 23105da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 23115da71efaSEric Millbrandt chips might think that the current transfer is still 23125da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 23135da71efaSEric Millbrandt commands until the slave device responds. 23145da71efaSEric Millbrandt 2315b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2316b37c7e5eSwdenk 2317ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2318b37c7e5eSwdenk then the following macros need to be defined (examples are 2319b37c7e5eSwdenk from include/configs/lwmon.h): 2320c609719bSwdenk 2321c609719bSwdenk I2C_INIT 2322c609719bSwdenk 2323b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2324c609719bSwdenk controller or configure ports. 2325c609719bSwdenk 2326b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2327b37c7e5eSwdenk 2328c609719bSwdenk I2C_PORT 2329c609719bSwdenk 2330c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2331c609719bSwdenk assumes both bits are on the same port). Valid values 2332c609719bSwdenk are 0..3 for ports A..D. 2333c609719bSwdenk 2334c609719bSwdenk I2C_ACTIVE 2335c609719bSwdenk 2336c609719bSwdenk The code necessary to make the I2C data line active 2337c609719bSwdenk (driven). If the data line is open collector, this 2338c609719bSwdenk define can be null. 2339c609719bSwdenk 2340b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2341b37c7e5eSwdenk 2342c609719bSwdenk I2C_TRISTATE 2343c609719bSwdenk 2344c609719bSwdenk The code necessary to make the I2C data line tri-stated 2345c609719bSwdenk (inactive). If the data line is open collector, this 2346c609719bSwdenk define can be null. 2347c609719bSwdenk 2348b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2349b37c7e5eSwdenk 2350c609719bSwdenk I2C_READ 2351c609719bSwdenk 2352472d5460SYork Sun Code that returns true if the I2C data line is high, 2353472d5460SYork Sun false if it is low. 2354c609719bSwdenk 2355b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2356b37c7e5eSwdenk 2357c609719bSwdenk I2C_SDA(bit) 2358c609719bSwdenk 2359472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2360472d5460SYork Sun is false, it clears it (low). 2361c609719bSwdenk 2362b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2363b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2364b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2365b37c7e5eSwdenk 2366c609719bSwdenk I2C_SCL(bit) 2367c609719bSwdenk 2368472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2369472d5460SYork Sun is false, it clears it (low). 2370c609719bSwdenk 2371b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2372b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2373b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2374b37c7e5eSwdenk 2375c609719bSwdenk I2C_DELAY 2376c609719bSwdenk 2377c609719bSwdenk This delay is invoked four times per clock cycle so this 2378c609719bSwdenk controls the rate of data transfer. The data rate thus 2379b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2380b37c7e5eSwdenk like: 2381b37c7e5eSwdenk 2382b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2383c609719bSwdenk 2384793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2385793b5726SMike Frysinger 2386793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2387793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2388793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2389793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2390793b5726SMike Frysinger 2391793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2392793b5726SMike Frysinger the generic GPIO functions. 2393793b5726SMike Frysinger 23946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 239547cd00faSwdenk 239647cd00faSwdenk When a board is reset during an i2c bus transfer 239747cd00faSwdenk chips might think that the current transfer is still 239847cd00faSwdenk in progress. On some boards it is possible to access 239947cd00faSwdenk the i2c SCLK line directly, either by using the 240047cd00faSwdenk processor pin as a GPIO or by having a second pin 240147cd00faSwdenk connected to the bus. If this option is defined a 240247cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 240347cd00faSwdenk is run early in the boot sequence. 240447cd00faSwdenk 240526a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 240626a33504SRichard Retanubun 240726a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 240826a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 240926a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 241026a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 241126a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 241226a33504SRichard Retanubun controller provide such a method. It is called at the end of 241326a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 241426a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 241526a33504SRichard Retanubun 241617ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 241717ea1177Swdenk 241817ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 241917ea1177Swdenk in u-boot bd_info structure based on u-boot environment 242017ea1177Swdenk variable "i2cfast". (see also i2cfast) 242117ea1177Swdenk 2422bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2423bb99ad6dSBen Warren 2424bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2425bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2426bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2427bb99ad6dSBen Warren Note that bus numbering is zero-based. 2428bb99ad6dSBen Warren 24296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2430bb99ad6dSBen Warren 2431bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 24320f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 24330f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 24340f89c54bSPeter Tyser a 1D array of device addresses 2435bb99ad6dSBen Warren 2436bb99ad6dSBen Warren e.g. 2437bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 24386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2439bb99ad6dSBen Warren 2440bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2441bb99ad6dSBen Warren 2442bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 24436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2444bb99ad6dSBen Warren 2445bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2446bb99ad6dSBen Warren 24476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2448be5e6181STimur Tabi 2449be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2450be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2451be5e6181STimur Tabi 24526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 24530dc018ecSStefan Roese 24540dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 24550dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 24560dc018ecSStefan Roese 24576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 24580dc018ecSStefan Roese 24590dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 24600dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 24610dc018ecSStefan Roese 24626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 24639ebbb54fSVictor Gallardo 24649ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 24659ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 24669ebbb54fSVictor Gallardo specified DTT device. 24679ebbb54fSVictor Gallardo 24682ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 24692ac6985aSAndrew Dyer 24702ac6985aSAndrew Dyer defining this will force the i2c_read() function in 24712ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 24722ac6985aSAndrew Dyer between writing the address pointer and reading the 24732ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 24742ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 24752ac6985aSAndrew Dyer devices can use either method, but some require one or 24762ac6985aSAndrew Dyer the other. 2477be5e6181STimur Tabi 2478c609719bSwdenk- SPI Support: CONFIG_SPI 2479c609719bSwdenk 2480c609719bSwdenk Enables SPI driver (so far only tested with 2481c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2482c609719bSwdenk D/As on the SACSng board) 2483c609719bSwdenk 24846639562eSYoshihiro Shimoda CONFIG_SH_SPI 24856639562eSYoshihiro Shimoda 24866639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 24876639562eSYoshihiro Shimoda only SH7757 is supported. 24886639562eSYoshihiro Shimoda 2489c609719bSwdenk CONFIG_SPI_X 2490c609719bSwdenk 2491c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2492c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2493c609719bSwdenk 2494c609719bSwdenk CONFIG_SOFT_SPI 2495c609719bSwdenk 2496c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2497c609719bSwdenk using hardware support. This is a general purpose 2498c609719bSwdenk driver that only requires three general I/O port pins 2499c609719bSwdenk (two outputs, one input) to function. If this is 2500c609719bSwdenk defined, the board configuration must define several 2501c609719bSwdenk SPI configuration items (port pins to use, etc). For 2502c609719bSwdenk an example, see include/configs/sacsng.h. 2503c609719bSwdenk 250404a9e118SBen Warren CONFIG_HARD_SPI 250504a9e118SBen Warren 250604a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 250704a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 250804a9e118SBen Warren must define a list of chip-select function pointers. 250904a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 251004a9e118SBen Warren example, see include/configs/mpc8349emds.h. 251104a9e118SBen Warren 251238254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 251338254f45SGuennadi Liakhovetski 251438254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 25152e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 251638254f45SGuennadi Liakhovetski 25170133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 25180133502eSMatthias Fuchs 25190133502eSMatthias Fuchs Enables FPGA subsystem. 25200133502eSMatthias Fuchs 25210133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 25220133502eSMatthias Fuchs 25230133502eSMatthias Fuchs Enables support for specific chip vendors. 25240133502eSMatthias Fuchs (ALTERA, XILINX) 25250133502eSMatthias Fuchs 25260133502eSMatthias Fuchs CONFIG_FPGA_<family> 25270133502eSMatthias Fuchs 25280133502eSMatthias Fuchs Enables support for FPGA family. 25290133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 25300133502eSMatthias Fuchs 25310133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2532c609719bSwdenk 2533c609719bSwdenk Specify the number of FPGA devices to support. 2534c609719bSwdenk 25356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2536c609719bSwdenk 2537c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2538c609719bSwdenk 25396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2540c609719bSwdenk 2541c609719bSwdenk Enable checks on FPGA configuration interface busy 2542c609719bSwdenk status by the configuration function. This option 2543c609719bSwdenk will require a board or device specific function to 2544c609719bSwdenk be written. 2545c609719bSwdenk 2546c609719bSwdenk CONFIG_FPGA_DELAY 2547c609719bSwdenk 2548c609719bSwdenk If defined, a function that provides delays in the FPGA 2549c609719bSwdenk configuration driver. 2550c609719bSwdenk 25516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2552c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2553c609719bSwdenk 25546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2555c609719bSwdenk 2556c609719bSwdenk Check for configuration errors during FPGA bitfile 2557c609719bSwdenk loading. For example, abort during Virtex II 2558c609719bSwdenk configuration if the INIT_B line goes low (which 2559c609719bSwdenk indicated a CRC error). 2560c609719bSwdenk 25616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2562c609719bSwdenk 2563c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2564c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2565c609719bSwdenk FPGA configuration sequence. The default time is 500 256611ccc33fSMarcel Ziswiler ms. 2567c609719bSwdenk 25686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2569c609719bSwdenk 2570c609719bSwdenk Maximum time to wait for BUSY to deassert during 257111ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2572c609719bSwdenk 25736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2574c609719bSwdenk 2575c609719bSwdenk Time to wait after FPGA configuration. The default is 257611ccc33fSMarcel Ziswiler 200 ms. 2577c609719bSwdenk 2578c609719bSwdenk- Configuration Management: 2579c609719bSwdenk CONFIG_IDENT_STRING 2580c609719bSwdenk 2581c609719bSwdenk If defined, this string will be added to the U-Boot 2582c609719bSwdenk version information (U_BOOT_VERSION) 2583c609719bSwdenk 2584c609719bSwdenk- Vendor Parameter Protection: 2585c609719bSwdenk 2586c609719bSwdenk U-Boot considers the values of the environment 2587c609719bSwdenk variables "serial#" (Board Serial Number) and 25887152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2589c609719bSwdenk are set once by the board vendor / manufacturer, and 2590c609719bSwdenk protects these variables from casual modification by 2591c609719bSwdenk the user. Once set, these variables are read-only, 2592c609719bSwdenk and write or delete attempts are rejected. You can 259311ccc33fSMarcel Ziswiler change this behaviour: 2594c609719bSwdenk 2595c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2596c609719bSwdenk file, the write protection for vendor parameters is 259747cd00faSwdenk completely disabled. Anybody can change or delete 2598c609719bSwdenk these parameters. 2599c609719bSwdenk 2600c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2601c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 260211ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2603c609719bSwdenk which can be changed exactly ONCE by the user. [The 2604c609719bSwdenk serial# is unaffected by this, i. e. it remains 2605c609719bSwdenk read-only.] 2606c609719bSwdenk 26072598090bSJoe Hershberger The same can be accomplished in a more flexible way 26082598090bSJoe Hershberger for any variable by configuring the type of access 26092598090bSJoe Hershberger to allow for those variables in the ".flags" variable 26102598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 26112598090bSJoe Hershberger 2612c609719bSwdenk- Protected RAM: 2613c609719bSwdenk CONFIG_PRAM 2614c609719bSwdenk 2615c609719bSwdenk Define this variable to enable the reservation of 2616c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2617c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2618c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2619c609719bSwdenk this default value by defining an environment 2620c609719bSwdenk variable "pram" to the number of kB you want to 2621c609719bSwdenk reserve. Note that the board info structure will 2622c609719bSwdenk still show the full amount of RAM. If pRAM is 2623c609719bSwdenk reserved, a new environment variable "mem" will 2624c609719bSwdenk automatically be defined to hold the amount of 2625c609719bSwdenk remaining RAM in a form that can be passed as boot 2626c609719bSwdenk argument to Linux, for instance like that: 2627c609719bSwdenk 2628fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2629c609719bSwdenk saveenv 2630c609719bSwdenk 2631c609719bSwdenk This way you can tell Linux not to use this memory, 2632c609719bSwdenk either, which results in a memory region that will 2633c609719bSwdenk not be affected by reboots. 2634c609719bSwdenk 2635c609719bSwdenk *WARNING* If your board configuration uses automatic 2636c609719bSwdenk detection of the RAM size, you must make sure that 2637c609719bSwdenk this memory test is non-destructive. So far, the 2638c609719bSwdenk following board configurations are known to be 2639c609719bSwdenk "pRAM-clean": 2640c609719bSwdenk 26411b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 26421b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2643544d97e9SWolfgang Denk FLAGADM, TQM8260 2644c609719bSwdenk 264540fef049SGabe Black- Access to physical memory region (> 4GB) 264640fef049SGabe Black Some basic support is provided for operations on memory not 264740fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 264840fef049SGabe Black support access to more than 4GB of memory on 32-bit 264940fef049SGabe Black machines using physical address extension or similar. 265040fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 265140fef049SGabe Black currently only supports clearing the memory. 265240fef049SGabe Black 2653c609719bSwdenk- Error Recovery: 2654c609719bSwdenk CONFIG_PANIC_HANG 2655c609719bSwdenk 2656c609719bSwdenk Define this variable to stop the system in case of a 2657c609719bSwdenk fatal error, so that you have to reset it manually. 2658c609719bSwdenk This is probably NOT a good idea for an embedded 265911ccc33fSMarcel Ziswiler system where you want the system to reboot 2660c609719bSwdenk automatically as fast as possible, but it may be 2661c609719bSwdenk useful during development since you can try to debug 2662c609719bSwdenk the conditions that lead to the situation. 2663c609719bSwdenk 2664c609719bSwdenk CONFIG_NET_RETRY_COUNT 2665c609719bSwdenk 2666c609719bSwdenk This variable defines the number of retries for 2667c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2668c609719bSwdenk before giving up the operation. If not defined, a 2669c609719bSwdenk default value of 5 is used. 2670c609719bSwdenk 267140cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 267240cb90eeSGuennadi Liakhovetski 267340cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 267440cb90eeSGuennadi Liakhovetski 267548a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 267648a3e999STetsuyuki Kobayashi 267748a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 267848a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 267948a3e999STetsuyuki Kobayashi try longer timeout such as 268048a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 268148a3e999STetsuyuki Kobayashi 2682c609719bSwdenk- Command Interpreter: 26838078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 268404a85b3bSwdenk 268504a85b3bSwdenk Enable auto completion of commands using TAB. 268604a85b3bSwdenk 26878078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 26888078f1a5SWolfgang Denk for the "hush" shell. 26898078f1a5SWolfgang Denk 26908078f1a5SWolfgang Denk 26916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2692c609719bSwdenk 2693c609719bSwdenk Define this variable to enable the "hush" shell (from 2694c609719bSwdenk Busybox) as command line interpreter, thus enabling 2695c609719bSwdenk powerful command line syntax like 2696c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2697c609719bSwdenk constructs ("shell scripts"). 2698c609719bSwdenk 2699c609719bSwdenk If undefined, you get the old, much simpler behaviour 2700c609719bSwdenk with a somewhat smaller memory footprint. 2701c609719bSwdenk 2702c609719bSwdenk 27036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2704c609719bSwdenk 2705c609719bSwdenk This defines the secondary prompt string, which is 2706c609719bSwdenk printed when the command interpreter needs more input 2707c609719bSwdenk to complete a command. Usually "> ". 2708c609719bSwdenk 2709c609719bSwdenk Note: 2710c609719bSwdenk 2711c609719bSwdenk In the current implementation, the local variables 2712c609719bSwdenk space and global environment variables space are 2713c609719bSwdenk separated. Local variables are those you define by 27143b57fe0aSwdenk simply typing `name=value'. To access a local 2715c609719bSwdenk variable later on, you have write `$name' or 27163b57fe0aSwdenk `${name}'; to execute the contents of a variable 27173b57fe0aSwdenk directly type `$name' at the command prompt. 2718c609719bSwdenk 2719c609719bSwdenk Global environment variables are those you use 2720c609719bSwdenk setenv/printenv to work with. To run a command stored 2721c609719bSwdenk in such a variable, you need to use the run command, 2722c609719bSwdenk and you must not use the '$' sign to access them. 2723c609719bSwdenk 2724c609719bSwdenk To store commands and special characters in a 2725c609719bSwdenk variable, please use double quotation marks 2726c609719bSwdenk surrounding the whole text of the variable, instead 2727c609719bSwdenk of the backslashes before semicolons and special 2728c609719bSwdenk symbols. 2729c609719bSwdenk 2730aa0c71acSWolfgang Denk- Commandline Editing and History: 2731aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2732aa0c71acSWolfgang Denk 273311ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2734aa0c71acSWolfgang Denk commandline input operations 2735aa0c71acSWolfgang Denk 2736a8c7c708Swdenk- Default Environment: 2737c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2738c609719bSwdenk 2739c609719bSwdenk Define this to contain any number of null terminated 2740c609719bSwdenk strings (variable = value pairs) that will be part of 27417152b1d0Swdenk the default environment compiled into the boot image. 27422262cfeeSwdenk 2743c609719bSwdenk For example, place something like this in your 2744c609719bSwdenk board's config file: 2745c609719bSwdenk 2746c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2747c609719bSwdenk "myvar1=value1\0" \ 2748c609719bSwdenk "myvar2=value2\0" 2749c609719bSwdenk 2750c609719bSwdenk Warning: This method is based on knowledge about the 2751c609719bSwdenk internal format how the environment is stored by the 27522262cfeeSwdenk U-Boot code. This is NOT an official, exported 2753c609719bSwdenk interface! Although it is unlikely that this format 27547152b1d0Swdenk will change soon, there is no guarantee either. 2755c609719bSwdenk You better know what you are doing here. 2756c609719bSwdenk 2757c609719bSwdenk Note: overly (ab)use of the default environment is 2758c609719bSwdenk discouraged. Make sure to check other ways to preset 275974de7aefSWolfgang Denk the environment like the "source" command or the 2760c609719bSwdenk boot command first. 2761c609719bSwdenk 27625e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 27635e724ca2SStephen Warren 27645e724ca2SStephen Warren Define this in order to add variables describing the 27655e724ca2SStephen Warren U-Boot build configuration to the default environment. 27665e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 27675e724ca2SStephen Warren 27685e724ca2SStephen Warren Enabling this option will cause the following to be defined: 27695e724ca2SStephen Warren 27705e724ca2SStephen Warren - CONFIG_SYS_ARCH 27715e724ca2SStephen Warren - CONFIG_SYS_CPU 27725e724ca2SStephen Warren - CONFIG_SYS_BOARD 27735e724ca2SStephen Warren - CONFIG_SYS_VENDOR 27745e724ca2SStephen Warren - CONFIG_SYS_SOC 27755e724ca2SStephen Warren 27767e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 27777e27f89fSTom Rini 27787e27f89fSTom Rini Define this in order to add variables describing certain 27797e27f89fSTom Rini run-time determined information about the hardware to the 27807e27f89fSTom Rini environment. These will be named board_name, board_rev. 27817e27f89fSTom Rini 278206fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 278306fd8538SSimon Glass 278406fd8538SSimon Glass Normally the environment is loaded when the board is 278506fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 278606fd8538SSimon Glass that so that the environment is not available until 278706fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 278806fd8538SSimon Glass this is instead controlled by the value of 278906fd8538SSimon Glass /config/load-environment. 279006fd8538SSimon Glass 2791a8c7c708Swdenk- DataFlash Support: 27922abbe075Swdenk CONFIG_HAS_DATAFLASH 27932abbe075Swdenk 27942abbe075Swdenk Defining this option enables DataFlash features and 27952abbe075Swdenk allows to read/write in Dataflash via the standard 27962abbe075Swdenk commands cp, md... 27972abbe075Swdenk 2798f61ec45eSEric Nelson- Serial Flash support 2799f61ec45eSEric Nelson CONFIG_CMD_SF 2800f61ec45eSEric Nelson 2801f61ec45eSEric Nelson Defining this option enables SPI flash commands 2802f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2803f61ec45eSEric Nelson 2804f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2805f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2806f61ec45eSEric Nelson commands. 2807f61ec45eSEric Nelson 2808f61ec45eSEric Nelson The following defaults may be provided by the platform 2809f61ec45eSEric Nelson to handle the common case when only a single serial 2810f61ec45eSEric Nelson flash is present on the system. 2811f61ec45eSEric Nelson 2812f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2813f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2814f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2815f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2816f61ec45eSEric Nelson 281724007273SSimon Glass CONFIG_CMD_SF_TEST 281824007273SSimon Glass 281924007273SSimon Glass Define this option to include a destructive SPI flash 282024007273SSimon Glass test ('sf test'). 282124007273SSimon Glass 28221dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 28231dcd6d03SJagannadha Sutradharudu Teki 28241dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 28251dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 28261dcd6d03SJagannadha Sutradharudu Teki 2827b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2828b902e07cSJagannadha Sutradharudu Teki 2829b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2830b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2831b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2832b902e07cSJagannadha Sutradharudu Teki 28333f85ce27Swdenk- SystemACE Support: 28343f85ce27Swdenk CONFIG_SYSTEMACE 28353f85ce27Swdenk 28363f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 28373f85ce27Swdenk chips attached via some sort of local bus. The address 283811ccc33fSMarcel Ziswiler of the chip must also be defined in the 28396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 28403f85ce27Swdenk 28413f85ce27Swdenk #define CONFIG_SYSTEMACE 28426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 28433f85ce27Swdenk 28443f85ce27Swdenk When SystemACE support is added, the "ace" device type 28453f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 28463f85ce27Swdenk 2847ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2848ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2849ecb0ccd9SWolfgang Denk 285028cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2851ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 285228cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2853ecb0ccd9SWolfgang Denk number generator is used. 2854ecb0ccd9SWolfgang Denk 285528cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 285628cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 285728cb9375SWolfgang Denk defined, the normal port 69 is used. 285828cb9375SWolfgang Denk 285928cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2860ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2861ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2862ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2863ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2864ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2865ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2866ecb0ccd9SWolfgang Denk 2867bf36c5d5SSimon Glass- Hashing support: 2868bf36c5d5SSimon Glass CONFIG_CMD_HASH 2869bf36c5d5SSimon Glass 2870bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2871bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2872bf36c5d5SSimon Glass 2873bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2874bf36c5d5SSimon Glass 2875bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2876bf36c5d5SSimon Glass size a little. 2877bf36c5d5SSimon Glass 2878bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2879bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2880bf36c5d5SSimon Glass 2881bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2882bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2883bf36c5d5SSimon Glass 2884a11f1873SRobert Winkler- Freescale i.MX specific commands: 2885a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2886a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2887a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2888a11f1873SRobert Winkler 2889a11f1873SRobert Winkler CONFIG_CMD_BMODE 2890a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2891a11f1873SRobert Winkler a boot from specific media. 2892a11f1873SRobert Winkler 2893a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2894a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2895a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2896a11f1873SRobert Winkler will set it back to normal. This command currently 2897a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2898a11f1873SRobert Winkler 289919c402afSSimon Glass- Signing support: 290019c402afSSimon Glass CONFIG_RSA 290119c402afSSimon Glass 290219c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 29038bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 290419c402afSSimon Glass 290519c402afSSimon Glass The signing part is build into mkimage regardless of this 290619c402afSSimon Glass option. 290719c402afSSimon Glass 29089e50c406SHeiko Schocher- bootcount support: 29099e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 29109e50c406SHeiko Schocher 29119e50c406SHeiko Schocher This enables the bootcounter support, see: 29129e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 29139e50c406SHeiko Schocher 29149e50c406SHeiko Schocher CONFIG_AT91SAM9XE 29159e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 29169e50c406SHeiko Schocher CONFIG_BLACKFIN 29179e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 29189e50c406SHeiko Schocher CONFIG_SOC_DA8XX 29199e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 29209e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 29219e50c406SHeiko Schocher enable support for the bootcounter in RAM 29229e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 29239e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 29249e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 29259e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 29269e50c406SHeiko Schocher the bootcounter. 29279e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 292819c402afSSimon Glass 2929a8c7c708Swdenk- Show boot progress: 2930c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2931c609719bSwdenk 2932c609719bSwdenk Defining this option allows to add some board- 2933c609719bSwdenk specific code (calling a user-provided function 2934c609719bSwdenk "show_boot_progress(int)") that enables you to show 2935c609719bSwdenk the system's boot progress on some display (for 2936c609719bSwdenk example, some LED's) on your board. At the moment, 2937c609719bSwdenk the following checkpoints are implemented: 2938c609719bSwdenk 29393a608ca0SSimon Glass- Detailed boot stage timing 29403a608ca0SSimon Glass CONFIG_BOOTSTAGE 29413a608ca0SSimon Glass Define this option to get detailed timing of each stage 29423a608ca0SSimon Glass of the boot process. 29433a608ca0SSimon Glass 29443a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 29453a608ca0SSimon Glass This is the number of available user bootstage records. 29463a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 29473a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 29483a608ca0SSimon Glass the limit, recording will stop. 29493a608ca0SSimon Glass 29503a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 29513a608ca0SSimon Glass Define this to print a report before boot, similar to this: 29523a608ca0SSimon Glass 29533a608ca0SSimon Glass Timer summary in microseconds: 29543a608ca0SSimon Glass Mark Elapsed Stage 29553a608ca0SSimon Glass 0 0 reset 29563a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 29573a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 29583a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 29593a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 29603a608ca0SSimon Glass 3,910,375 250,777 main_loop 29613a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 29623a608ca0SSimon Glass 30,361,327 445,160 start_kernel 29633a608ca0SSimon Glass 29642eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 29652eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 29662eba38cfSSimon Glass and un/stashing of bootstage data. 29672eba38cfSSimon Glass 296894fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 296994fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 297094fd1316SSimon Glass node is created with each bootstage id as a child. Each child 297194fd1316SSimon Glass has a 'name' property and either 'mark' containing the 297294fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 297394fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 297494fd1316SSimon Glass For example: 297594fd1316SSimon Glass 297694fd1316SSimon Glass bootstage { 297794fd1316SSimon Glass 154 { 297894fd1316SSimon Glass name = "board_init_f"; 297994fd1316SSimon Glass mark = <3575678>; 298094fd1316SSimon Glass }; 298194fd1316SSimon Glass 170 { 298294fd1316SSimon Glass name = "lcd"; 298394fd1316SSimon Glass accum = <33482>; 298494fd1316SSimon Glass }; 298594fd1316SSimon Glass }; 298694fd1316SSimon Glass 298794fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 298894fd1316SSimon Glass 29891372cce2SMarian BalakowiczLegacy uImage format: 29901372cce2SMarian Balakowicz 2991c609719bSwdenk Arg Where When 2992c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2993c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2994c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2995c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2996c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2997c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2998c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2999c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3000c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 30011372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3002c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3003c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3004c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3005c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 30061372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3007c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 30081372cce2SMarian Balakowicz 30091372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 30101372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 30111372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 30121372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 30131372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 30141372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 30151372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 301611ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 30171372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 30181372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 30191372cce2SMarian Balakowicz 3020ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3021c609719bSwdenk 3022a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 302363e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 302463e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 302563e73c9aSwdenk 3026566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3027566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3028566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3029566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3030566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3031566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3032566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3033566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3034566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3035566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3036566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3037566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3038566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3039566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3040566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3041566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3042566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3043566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3044566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3045566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3046566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3047566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3048566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3049566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3050566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3051566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3052566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3053566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3054566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3055566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3056566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3057566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3058566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3059566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3060566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3061566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3062566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3063566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3064566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3065566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3066566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3067566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3068566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3069566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3070566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3071566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3072566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3073c609719bSwdenk 3074566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3075c609719bSwdenk 3076566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3077566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3078566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3079206c60cbSwdenk 3080566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3081566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 308211ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3083566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3084566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3085566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 308674de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 308774de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3088566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3089c609719bSwdenk 30901372cce2SMarian BalakowiczFIT uImage format: 30911372cce2SMarian Balakowicz 30921372cce2SMarian Balakowicz Arg Where When 30931372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 30941372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 30951372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 30961372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 30971372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 30981372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3099f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 31001372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 31011372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 31021372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 31031372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 31041372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 310511ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 310611ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 31071372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 31081372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 31091372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 31101372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 31111372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 31121372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 31131372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 31141372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 31151372cce2SMarian Balakowicz 31161372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 31171372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 31181372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 311911ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 31201372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 31211372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 31221372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 31231372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 31241372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 31251372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 31261372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 31271372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 31281372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 31291372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 31301372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 31311372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 31321372cce2SMarian Balakowicz 313311ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 31341372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 31351372cce2SMarian Balakowicz 313611ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 31371372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 31381372cce2SMarian Balakowicz 313911ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 31401372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 31411372cce2SMarian Balakowicz 3142d95f6ec7SGabe Black- FIT image support: 3143d95f6ec7SGabe Black CONFIG_FIT 3144d95f6ec7SGabe Black Enable support for the FIT uImage format. 3145d95f6ec7SGabe Black 3146d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3147d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3148d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3149d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3150d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3151d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3152d95f6ec7SGabe Black 31533e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 31543e569a6bSSimon Glass This option enables signature verification of FIT uImages, 31553e569a6bSSimon Glass using a hash signed and verified using RSA. See 31563e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 31573e569a6bSSimon Glass 31584cf2609bSWolfgang Denk- Standalone program support: 31594cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 31604cf2609bSWolfgang Denk 31616feff899SWolfgang Denk This option defines a board specific value for the 31626feff899SWolfgang Denk address where standalone program gets loaded, thus 31636feff899SWolfgang Denk overwriting the architecture dependent default 31644cf2609bSWolfgang Denk settings. 31654cf2609bSWolfgang Denk 31664cf2609bSWolfgang Denk- Frame Buffer Address: 31674cf2609bSWolfgang Denk CONFIG_FB_ADDR 31684cf2609bSWolfgang Denk 31694cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 317044a53b57SWolfgang Denk address for frame buffer. This is typically the case 317144a53b57SWolfgang Denk when using a graphics controller has separate video 317244a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 317344a53b57SWolfgang Denk the given address instead of dynamically reserving it 317444a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 317544a53b57SWolfgang Denk the memory for the frame buffer depending on the 317644a53b57SWolfgang Denk configured panel size. 31774cf2609bSWolfgang Denk 31784cf2609bSWolfgang Denk Please see board_init_f function. 31794cf2609bSWolfgang Denk 3180cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3181cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3182cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3183cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3184cccfc2abSDetlev Zundel 3185cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3186cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3187cccfc2abSDetlev Zundel 3188cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3189cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3190cccfc2abSDetlev Zundel 3191cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3192cccfc2abSDetlev Zundel Needed for mtdparts command support. 3193cccfc2abSDetlev Zundel 3194cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3195cccfc2abSDetlev Zundel 3196cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3197cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3198cccfc2abSDetlev Zundel 319970c219cdSJoe Hershberger- UBI support 320070c219cdSJoe Hershberger CONFIG_CMD_UBI 320170c219cdSJoe Hershberger 320270c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 320370c219cdSJoe Hershberger with the UBI flash translation layer 320470c219cdSJoe Hershberger 320570c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 320670c219cdSJoe Hershberger 3207147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3208147162daSJoe Hershberger 3209147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3210147162daSJoe Hershberger warnings and errors enabled. 3211147162daSJoe Hershberger 321270c219cdSJoe Hershberger- UBIFS support 321370c219cdSJoe Hershberger CONFIG_CMD_UBIFS 321470c219cdSJoe Hershberger 321570c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 321670c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 321770c219cdSJoe Hershberger 321870c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 321970c219cdSJoe Hershberger 3220147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3221147162daSJoe Hershberger 3222147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3223147162daSJoe Hershberger warnings and errors enabled. 3224147162daSJoe Hershberger 32256a11cf48SDaniel Schwierzeck- SPL framework 32266a11cf48SDaniel Schwierzeck CONFIG_SPL 32276a11cf48SDaniel Schwierzeck Enable building of SPL globally. 32286a11cf48SDaniel Schwierzeck 322995579793STom Rini CONFIG_SPL_LDSCRIPT 323095579793STom Rini LDSCRIPT for linking the SPL binary. 323195579793STom Rini 32326ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 32336ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 32346ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 32356ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 32368960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32376ebc3461SAlbert ARIBAUD must not be both defined at the same time. 32386ebc3461SAlbert ARIBAUD 323995579793STom Rini CONFIG_SPL_MAX_SIZE 32406ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 32416ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 32426ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 32436ebc3461SAlbert ARIBAUD not exceed it. 324495579793STom Rini 32456a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 32466a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 32476a11cf48SDaniel Schwierzeck 324894a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 324994a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 325094a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 325194a45bb1SScott Wood 325295579793STom Rini CONFIG_SPL_BSS_START_ADDR 325395579793STom Rini Link address for the BSS within the SPL binary. 325495579793STom Rini 325595579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 32566ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 32576ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 32586ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 32598960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32606ebc3461SAlbert ARIBAUD must not be both defined at the same time. 326195579793STom Rini 326295579793STom Rini CONFIG_SPL_STACK 326395579793STom Rini Adress of the start of the stack SPL will use 326495579793STom Rini 326594a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 326694a45bb1SScott Wood Adress of the start of the stack SPL will use after 326794a45bb1SScott Wood relocation. If unspecified, this is equal to 326894a45bb1SScott Wood CONFIG_SPL_STACK. 326994a45bb1SScott Wood 327095579793STom Rini CONFIG_SYS_SPL_MALLOC_START 327195579793STom Rini Starting address of the malloc pool used in SPL. 327295579793STom Rini 327395579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 327495579793STom Rini The size of the malloc pool used in SPL. 32756a11cf48SDaniel Schwierzeck 327647f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 327747f7bcaeSTom Rini Enable the SPL framework under common/. This framework 327847f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 327947f7bcaeSTom Rini NAND loading of the Linux Kernel. 328047f7bcaeSTom Rini 3281861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3282861a86f4STom Rini For ARM, enable an optional function to print more information 3283861a86f4STom Rini about the running system. 3284861a86f4STom Rini 32854b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 32864b919725SScott Wood Arch init code should be built for a very small image 32874b919725SScott Wood 32886a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 32896a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 32906a11cf48SDaniel Schwierzeck 32916a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 32926a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 32936a11cf48SDaniel Schwierzeck 32946a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 32956a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 32966a11cf48SDaniel Schwierzeck 32976a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 32986a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 32996a11cf48SDaniel Schwierzeck 33006a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 33016a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 33026a11cf48SDaniel Schwierzeck 330395579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 330495579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 330595579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 330695579793STom Rini Address, size and partition on the MMC to load U-Boot from 330795579793STom Rini when the MMC is being used in raw mode. 330895579793STom Rini 33092b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 33102b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 33112b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 33122b75b0adSPeter Korsgaard 33132b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 33142b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 33152b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 33162b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 33172b75b0adSPeter Korsgaard (for falcon mode) 33182b75b0adSPeter Korsgaard 331995579793STom Rini CONFIG_SPL_FAT_SUPPORT 332095579793STom Rini Support for fs/fat/libfat.o in SPL binary 332195579793STom Rini 332295579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 332395579793STom Rini Filename to read to load U-Boot when reading from FAT 332495579793STom Rini 33257ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 33267ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 33277ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 33287ad2cc79SPeter Korsgaard 33297ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 33307ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 33317ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 33327ad2cc79SPeter Korsgaard 333306f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 333406f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 333506f60ae3SScott Wood start.S waits for the rest of the SPL to load before 333606f60ae3SScott Wood continuing (the hardware starts execution after just 333706f60ae3SScott Wood loading the first page rather than the full 4K). 333806f60ae3SScott Wood 3339651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3340651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3341651fcf60SPrabhakar Kushwaha 33426f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 33436f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 33446f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 33456f2f01b9SScott Wood 33466f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 33476f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 33486f2f01b9SScott Wood 33496f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 33506f2f01b9SScott Wood Include standard software ECC in the SPL 33516f2f01b9SScott Wood 335295579793STom Rini CONFIG_SPL_NAND_SIMPLE 33537d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 33547d4b7955SScott Wood expose the cmd_ctrl() interface. 335595579793STom Rini 3356bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3357bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 33585614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3359bb0dc108SYing Zhang 33607c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 33617c8eea59SYing Zhang Set for common ddr init with serial presence detect in 33627c8eea59SYing Zhang SPL binary. 33637c8eea59SYing Zhang 336495579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 336595579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 336695579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 336795579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 336895579793STom Rini CONFIG_SYS_NAND_ECCBYTES 336995579793STom Rini Defines the size and behavior of the NAND that SPL uses 33707d4b7955SScott Wood to read U-Boot 337195579793STom Rini 3372fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3373fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3374fbe76ae4SPrabhakar Kushwaha 337595579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 33767d4b7955SScott Wood Location in NAND to read U-Boot from 33777d4b7955SScott Wood 33787d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 33797d4b7955SScott Wood Location in memory to load U-Boot to 33807d4b7955SScott Wood 33817d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 33827d4b7955SScott Wood Size of image to load 338395579793STom Rini 338495579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 33857d4b7955SScott Wood Entry point in loaded image to jump to 338695579793STom Rini 338795579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 338895579793STom Rini Define this if you need to first read the OOB and then the 338995579793STom Rini data. This is used for example on davinci plattforms. 339095579793STom Rini 339195579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 339295579793STom Rini Support for an OMAP3-specific set of functions to return the 339395579793STom Rini ID and MFR of the first attached NAND chip, if present. 339495579793STom Rini 33956a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 33966a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 33976a11cf48SDaniel Schwierzeck 33986a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 33996a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 34006a11cf48SDaniel Schwierzeck 34016a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 34026a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 34036a11cf48SDaniel Schwierzeck 3404c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3405c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3406c57b953dSPavel Machek 34076a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 34086a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 34091372cce2SMarian Balakowicz 3410ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3411ba1bee43SYing Zhang Support for the environment operating in SPL binary 3412ba1bee43SYing Zhang 3413ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3414ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3415ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3416ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3417ba1bee43SYing Zhang 341874752baaSScott Wood CONFIG_SPL_PAD_TO 34196113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 34206113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 34216113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34226113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34236113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 342474752baaSScott Wood 3425ca2fca22SScott Wood CONFIG_SPL_TARGET 3426ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3427ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3428ca2fca22SScott Wood example if more than one image needs to be produced. 3429ca2fca22SScott Wood 343087ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 343187ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 343287ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 343387ebee39SSimon Glass option to re-enable it. This will affect the output of the 343487ebee39SSimon Glass bootm command when booting a FIT image. 343587ebee39SSimon Glass 34363aa29de0SYing Zhang- TPL framework 34373aa29de0SYing Zhang CONFIG_TPL 34383aa29de0SYing Zhang Enable building of TPL globally. 34393aa29de0SYing Zhang 34403aa29de0SYing Zhang CONFIG_TPL_PAD_TO 34413aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 34423aa29de0SYing Zhang the TPL payload. By default, this is defined as 34433aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34443aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34453aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 34463aa29de0SYing Zhang 3447c609719bSwdenkModem Support: 3448c609719bSwdenk-------------- 3449c609719bSwdenk 3450566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3451c609719bSwdenk 345211ccc33fSMarcel Ziswiler- Modem support enable: 3453c609719bSwdenk CONFIG_MODEM_SUPPORT 3454c609719bSwdenk 3455c609719bSwdenk- RTS/CTS Flow control enable: 3456c609719bSwdenk CONFIG_HWFLOW 3457c609719bSwdenk 3458c609719bSwdenk- Modem debug support: 3459c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3460c609719bSwdenk 3461c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3462c609719bSwdenk for modem support. Useful only with BDI2000. 3463c609719bSwdenk 3464a8c7c708Swdenk- Interrupt support (PPC): 3465a8c7c708Swdenk 3466a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3467a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 346811ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3469a8c7c708Swdenk should set decrementer_count to appropriate value. If 347011ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3471a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 347211ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3473a8c7c708Swdenk specific handling. If board has watchdog / status_led 3474a8c7c708Swdenk / other_activity_monitor it works automatically from 3475a8c7c708Swdenk general timer_interrupt(). 3476a8c7c708Swdenk 3477c609719bSwdenk- General: 3478c609719bSwdenk 3479c609719bSwdenk In the target system modem support is enabled when a 3480c609719bSwdenk specific key (key combination) is pressed during 3481c609719bSwdenk power-on. Otherwise U-Boot will boot normally 348211ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3483c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3484c609719bSwdenk function, returning 1 and thus enabling modem 3485c609719bSwdenk initialization. 3486c609719bSwdenk 3487c609719bSwdenk If there are no modem init strings in the 3488c609719bSwdenk environment, U-Boot proceed to autoboot; the 3489c609719bSwdenk previous output (banner, info printfs) will be 349011ccc33fSMarcel Ziswiler suppressed, though. 3491c609719bSwdenk 3492c609719bSwdenk See also: doc/README.Modem 3493c609719bSwdenk 34949660e442SHelmut RaigerBoard initialization settings: 34959660e442SHelmut Raiger------------------------------ 34969660e442SHelmut Raiger 34979660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 34989660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 34999660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 35009660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 35019660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 35029660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 35039660e442SHelmut Raiger 35049660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 35059660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 35069660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 35079660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3508c609719bSwdenk 3509c609719bSwdenkConfiguration Settings: 3510c609719bSwdenk----------------------- 3511c609719bSwdenk 35124d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 35134d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 35144d1fd7f1SYork Sun 35156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3516c609719bSwdenk undefine this when you're short of memory. 3517c609719bSwdenk 35182fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 35192fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 35202fb2604dSPeter Tyser 35216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3522c609719bSwdenk prompt for user input. 3523c609719bSwdenk 35246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3525c609719bSwdenk 35266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3527c609719bSwdenk 35286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3529c609719bSwdenk 35306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3531c609719bSwdenk the application (usually a Linux kernel) when it is 3532c609719bSwdenk booted 3533c609719bSwdenk 35346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3535c609719bSwdenk List of legal baudrate settings for this board. 3536c609719bSwdenk 35376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3538c609719bSwdenk Suppress display of console information at boot. 3539c609719bSwdenk 35406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3541c609719bSwdenk If the board specific function 3542c609719bSwdenk extern int overwrite_console (void); 3543c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3544c609719bSwdenk serial port, else the settings in the environment are used. 3545c609719bSwdenk 35466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3547c609719bSwdenk Enable the call to overwrite_console(). 3548c609719bSwdenk 35496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3550c609719bSwdenk Enable overwrite of previous console environment settings. 3551c609719bSwdenk 35526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3553c609719bSwdenk Begin and End addresses of the area used by the 3554c609719bSwdenk simple memory test. 3555c609719bSwdenk 35566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3557c609719bSwdenk Enable an alternate, more extensive memory test. 3558c609719bSwdenk 35596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 35605f535fe1Swdenk Scratch address used by the alternate memory test 35615f535fe1Swdenk You only need to set this if address zero isn't writeable 35625f535fe1Swdenk 35636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 35646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 356514f73ca6SStefan Roese this specified memory area will get subtracted from the top 356611ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 356714f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 356814f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 356914f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 35705e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 357114f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 35725e12e75dSStefan Roese will have to get fixed in Linux additionally. 357314f73ca6SStefan Roese 357414f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 357514f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 357614f73ca6SStefan Roese be touched. 357714f73ca6SStefan Roese 357814f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 357914f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 358014f73ca6SStefan Roese then the end address of the Linux memory will be located at a 358114f73ca6SStefan Roese non page size aligned address and this could cause major 358214f73ca6SStefan Roese problems. 358314f73ca6SStefan Roese 35846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3585c609719bSwdenk Enable temporary baudrate change while serial download 3586c609719bSwdenk 35876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3588c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3589c609719bSwdenk 35906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3591c609719bSwdenk Physical start address of Motherboard I/O (if using a 3592c609719bSwdenk Cogent motherboard) 3593c609719bSwdenk 35946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3595c609719bSwdenk Physical start address of Flash memory. 3596c609719bSwdenk 35976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3598c609719bSwdenk Physical start address of boot monitor code (set by 3599c609719bSwdenk make config files to be same as the text base address 360014d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 36016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3602c609719bSwdenk 36036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 36043b57fe0aSwdenk Size of memory reserved for monitor code, used to 36053b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 36063b57fe0aSwdenk embedded within the U-Boot image, or in a separate 36073b57fe0aSwdenk flash sector. 3608c609719bSwdenk 36096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3610c609719bSwdenk Size of DRAM reserved for malloc() use. 3611c609719bSwdenk 36126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 361315940c9aSStefan Roese Normally compressed uImages are limited to an 361415940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 36156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 361615940c9aSStefan Roese to adjust this setting to your needs. 3617c609719bSwdenk 36186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3619c609719bSwdenk Maximum size of memory mapped by the startup code of 3620c609719bSwdenk the Linux kernel; all data that must be processed by 36217d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 36227d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 36231bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 36247d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3625c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3626c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3627c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3628c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3629c609719bSwdenk 3630fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3631fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3632fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3633fca43cc8SJohn Rigby is enabled. 3634fca43cc8SJohn Rigby 3635fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3636fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3637fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3638fca43cc8SJohn Rigby 3639fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3640fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3641fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3642fca43cc8SJohn Rigby 36436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3644c609719bSwdenk Max number of Flash memory banks 3645c609719bSwdenk 36466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3647c609719bSwdenk Max number of sectors on a Flash chip 3648c609719bSwdenk 36496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3650c609719bSwdenk Timeout for Flash erase operations (in ms) 3651c609719bSwdenk 36526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3653c609719bSwdenk Timeout for Flash write operations (in ms) 3654c609719bSwdenk 36556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 36568564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 36578564acf9Swdenk 36586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 36598564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 36608564acf9Swdenk 36616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 36628564acf9Swdenk If defined, hardware flash sectors protection is used 36638564acf9Swdenk instead of U-Boot software protection. 36648564acf9Swdenk 36656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3666c609719bSwdenk 3667c609719bSwdenk Enable TFTP transfers directly to flash memory; 3668c609719bSwdenk without this option such a download has to be 3669c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3670c609719bSwdenk copy from RAM to flash. 3671c609719bSwdenk 3672c609719bSwdenk The two-step approach is usually more reliable, since 3673c609719bSwdenk you can check if the download worked before you erase 367411ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 367511ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3676c609719bSwdenk downloaded image) this option may be very useful. 3677c609719bSwdenk 36786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3679c609719bSwdenk Define if the flash driver uses extra elements in the 36805653fc33Swdenk common flash structure for storing flash geometry. 36815653fc33Swdenk 368200b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 36835653fc33Swdenk This option also enables the building of the cfi_flash driver 36845653fc33Swdenk in the drivers directory 368553cf9435Sstroese 368691809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 368791809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 368891809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 368991809ed5SPiotr Ziecik to the MTD layer. 369091809ed5SPiotr Ziecik 36916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 369296ef831fSGuennadi Liakhovetski Use buffered writes to flash. 369396ef831fSGuennadi Liakhovetski 369496ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 369596ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 369696ef831fSGuennadi Liakhovetski write commands. 369796ef831fSGuennadi Liakhovetski 36986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 36995568e613SStefan Roese If this option is defined, the common CFI flash doesn't 37005568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 37015568e613SStefan Roese is useful, if some of the configured banks are only 37025568e613SStefan Roese optionally available. 37035568e613SStefan Roese 37049a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 37059a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 37069a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 37079a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 37089a042e9cSJerry Van Baren 3709352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3710352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3711352ef3f1SStefan Roese against the source after the write operation. An error message 3712352ef3f1SStefan Roese will be printed when the contents are not identical. 3713352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3714352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3715352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3716352ef3f1SStefan Roese this option if you really know what you are doing. 3717352ef3f1SStefan Roese 37186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 371911ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 372011ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 372153cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 372253cf9435Sstroese buffers can be full shortly after enabling the interface 372311ccc33fSMarcel Ziswiler on high Ethernet traffic. 372453cf9435Sstroese Defaults to 4 if not defined. 3725c609719bSwdenk 3726ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3727ea882bafSWolfgang Denk 3728ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3729ea882bafSWolfgang Denk internally to store the environment settings. The default 3730ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3731ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3732ea882bafSWolfgang Denk lib/hashtable.c for details. 3733ea882bafSWolfgang Denk 37342598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 37352598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 37361bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 37372598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 37382598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 37392598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 37402598090bSJoe Hershberger 37412598090bSJoe Hershberger The format of the list is: 37422598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3743267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3744267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 37452598090bSJoe Hershberger entry = variable_name[:attributes] 37462598090bSJoe Hershberger list = entry[,list] 37472598090bSJoe Hershberger 37482598090bSJoe Hershberger The type attributes are: 37492598090bSJoe Hershberger s - String (default) 37502598090bSJoe Hershberger d - Decimal 37512598090bSJoe Hershberger x - Hexadecimal 37522598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 37532598090bSJoe Hershberger i - IP address 37542598090bSJoe Hershberger m - MAC address 37552598090bSJoe Hershberger 3756267541f7SJoe Hershberger The access attributes are: 3757267541f7SJoe Hershberger a - Any (default) 3758267541f7SJoe Hershberger r - Read-only 3759267541f7SJoe Hershberger o - Write-once 3760267541f7SJoe Hershberger c - Change-default 3761267541f7SJoe Hershberger 37622598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 37632598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 37642598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 37652598090bSJoe Hershberger 37662598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 37672598090bSJoe Hershberger Define this to a list (string) to define validation that 37682598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 37692598090bSJoe Hershberger environment variable. To override a setting in the static 37702598090bSJoe Hershberger list, simply add an entry for the same variable name to the 37712598090bSJoe Hershberger ".flags" variable. 37722598090bSJoe Hershberger 3773267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3774267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3775267541f7SJoe Hershberger access flags. 3776267541f7SJoe Hershberger 37775c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 37785c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 37795c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 37805c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 37815c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 37825c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 37835c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 37845c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 37855c1a7ea6SSimon Glass your board please report the problem and send patches! 37865c1a7ea6SSimon Glass 37870b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 37880b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 37890b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 37900b1b60c7SLokesh Vutla the value can be calulated on a given board. 3791632efa74SSimon Glass 3792c609719bSwdenkThe following definitions that deal with the placement and management 3793c609719bSwdenkof environment data (variable area); in general, we support the 3794c609719bSwdenkfollowing configurations: 3795c609719bSwdenk 3796c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3797c3eb3fe4SMike Frysinger 3798c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3799c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3800c3eb3fe4SMike Frysinger 38015a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3802c609719bSwdenk 3803c609719bSwdenk Define this if the environment is in flash memory. 3804c609719bSwdenk 3805c609719bSwdenk a) The environment occupies one whole flash sector, which is 3806c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3807c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3808c609719bSwdenk sector" type flash chips, which have several smaller 3809c609719bSwdenk sectors at the start or the end. For instance, such a 3810c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3811c609719bSwdenk such a case you would place the environment in one of the 3812c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3813c609719bSwdenk "top boot sector" type flash chips, you would put the 3814c609719bSwdenk environment in one of the last sectors, leaving a gap 3815c609719bSwdenk between U-Boot and the environment. 3816c609719bSwdenk 38170e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3818c609719bSwdenk 3819c609719bSwdenk Offset of environment data (variable area) to the 3820c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3821c609719bSwdenk type flash chips the second sector can be used: the offset 3822c609719bSwdenk for this sector is given here. 3823c609719bSwdenk 38246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3825c609719bSwdenk 38260e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3827c609719bSwdenk 3828c609719bSwdenk This is just another way to specify the start address of 3829c609719bSwdenk the flash sector containing the environment (instead of 38300e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3831c609719bSwdenk 38320e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3833c609719bSwdenk 3834c609719bSwdenk Size of the sector containing the environment. 3835c609719bSwdenk 3836c609719bSwdenk 3837c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3838c609719bSwdenk In such a case you don't want to spend a whole sector for 3839c609719bSwdenk the environment. 3840c609719bSwdenk 38410e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3842c609719bSwdenk 38435a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 38440e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3845c609719bSwdenk of this flash sector for the environment. This saves 3846c609719bSwdenk memory for the RAM copy of the environment. 3847c609719bSwdenk 3848c609719bSwdenk It may also save flash memory if you decide to use this 3849c609719bSwdenk when your environment is "embedded" within U-Boot code, 3850c609719bSwdenk since then the remainder of the flash sector could be used 3851c609719bSwdenk for U-Boot code. It should be pointed out that this is 3852c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3853c609719bSwdenk updating the environment in flash makes it always 3854c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3855c609719bSwdenk wrong before the contents has been restored from a copy in 3856c609719bSwdenk RAM, your target system will be dead. 3857c609719bSwdenk 38580e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 38590e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3860c609719bSwdenk 3861c609719bSwdenk These settings describe a second storage area used to hold 386211ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 38633e38691eSwdenk a valid backup copy in case there is a power failure during 3864c609719bSwdenk a "saveenv" operation. 3865c609719bSwdenk 3866c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3867c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3868c609719bSwdenkaccordingly! 3869c609719bSwdenk 3870c609719bSwdenk 38719314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3872c609719bSwdenk 3873c609719bSwdenk Define this if you have some non-volatile memory device 3874c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3875c609719bSwdenk environment. 3876c609719bSwdenk 38770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 38780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3879c609719bSwdenk 388011ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3881c609719bSwdenk want to use for environment. It is assumed that this memory 3882c609719bSwdenk can just be read and written to, without any special 3883c609719bSwdenk provision. 3884c609719bSwdenk 3885c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3886c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 388711ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3888c609719bSwdenkU-Boot will hang. 3889c609719bSwdenk 3890c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3891c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3892c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3893c609719bSwdenkto save the current settings. 3894c609719bSwdenk 3895c609719bSwdenk 3896bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3897c609719bSwdenk 3898c609719bSwdenk Use this if you have an EEPROM or similar serial access 3899c609719bSwdenk device and a driver for it. 3900c609719bSwdenk 39010e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39020e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3903c609719bSwdenk 3904c609719bSwdenk These two #defines specify the offset and size of the 3905c609719bSwdenk environment area within the total memory of your EEPROM. 3906c609719bSwdenk 39076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3908c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3909c609719bSwdenk The default address is zero. 3910c609719bSwdenk 39116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3912c609719bSwdenk If defined, the number of bits used to address bytes in a 3913c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3914c609719bSwdenk would require six bits. 3915c609719bSwdenk 39166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3917c609719bSwdenk If defined, the number of milliseconds to delay between 3918c609719bSwdenk page writes. The default is zero milliseconds. 3919c609719bSwdenk 39206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3921c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3922c609719bSwdenk that this is NOT the chip address length! 3923c609719bSwdenk 39246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 39255cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 39265cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 39275cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 39285cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 39295cf91d6bSwdenk byte chips. 39305cf91d6bSwdenk 39315cf91d6bSwdenk Note that we consider the length of the address field to 39325cf91d6bSwdenk still be one byte because the extra address bits are hidden 39335cf91d6bSwdenk in the chip address. 39345cf91d6bSwdenk 39356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3936c609719bSwdenk The size in bytes of the EEPROM device. 3937c609719bSwdenk 3938548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3939548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3940548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3941548738b4SHeiko Schocher 3942548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3943548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3944548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3945548738b4SHeiko Schocher EEPROM. For example: 3946548738b4SHeiko Schocher 3947ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3948548738b4SHeiko Schocher 3949548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3950548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3951c609719bSwdenk 3952057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 39535779d8d9Swdenk 39545779d8d9Swdenk Define this if you have a DataFlash memory device which you 39555779d8d9Swdenk want to use for the environment. 39565779d8d9Swdenk 39570e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39580e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39590e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 39605779d8d9Swdenk 39615779d8d9Swdenk These three #defines specify the offset and size of the 39625779d8d9Swdenk environment area within the total memory of your DataFlash placed 39635779d8d9Swdenk at the specified address. 39645779d8d9Swdenk 39650a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 39660a85a9e7SLiu Gang 39670a85a9e7SLiu Gang Define this if you have a remote memory space which you 39680a85a9e7SLiu Gang want to use for the local device's environment. 39690a85a9e7SLiu Gang 39700a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 39710a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 39720a85a9e7SLiu Gang 39730a85a9e7SLiu Gang These two #defines specify the address and size of the 39740a85a9e7SLiu Gang environment area within the remote memory space. The 39750a85a9e7SLiu Gang local device can get the environment from remote memory 3976fc54c7faSLiu Gang space by SRIO or PCIE links. 39770a85a9e7SLiu Gang 39780a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 39790a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3980fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3981fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 39820a85a9e7SLiu Gang 398351bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 398413a5695bSwdenk 398513a5695bSwdenk Define this if you have a NAND device which you want to use 398613a5695bSwdenk for the environment. 398713a5695bSwdenk 39880e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39890e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 399013a5695bSwdenk 399113a5695bSwdenk These two #defines specify the offset and size of the environment 3992fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3993fdd813deSScott Wood aligned to an erase block boundary. 39945779d8d9Swdenk 3995fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3996e443c944SMarkus Klotzbuecher 39970e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3998fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3999fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4000fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4001fdd813deSScott Wood aligned to an erase block boundary. 4002e443c944SMarkus Klotzbuecher 4003fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4004fdd813deSScott Wood 4005fdd813deSScott Wood Specifies the length of the region in which the environment 4006fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4007fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4008fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4009fdd813deSScott Wood the range to be avoided. 4010fdd813deSScott Wood 4011fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4012fdd813deSScott Wood 4013fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4014fdd813deSScott Wood environment from block zero's out-of-band data. The 4015fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4016fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4017fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4018e443c944SMarkus Klotzbuecher 4019b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4020b74ab737SGuennadi Liakhovetski 4021b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4022b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4023b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4024b74ab737SGuennadi Liakhovetski 40252b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 40262b74433fSJoe Hershberger 40272b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 40282b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 40292b74433fSJoe Hershberger accesses, which is important on NAND. 40302b74433fSJoe Hershberger 40312b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 40322b74433fSJoe Hershberger 40332b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 40342b74433fSJoe Hershberger 40352b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 40362b74433fSJoe Hershberger 40372b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 40382b74433fSJoe Hershberger environment in. 40392b74433fSJoe Hershberger 4040785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4041785881f7SJoe Hershberger 4042785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4043785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4044785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4045785881f7SJoe Hershberger 40462b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 40472b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 40482b74433fSJoe Hershberger 40492b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 40502b74433fSJoe Hershberger when storing the env in UBI. 40512b74433fSJoe Hershberger 405206e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 405306e4ae5fSStephen Warren 405406e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 405506e4ae5fSStephen Warren environment. 405606e4ae5fSStephen Warren 405706e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 405806e4ae5fSStephen Warren 405906e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 406006e4ae5fSStephen Warren 406106e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 406206e4ae5fSStephen Warren 406306e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 406406e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 406506e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 406606e4ae5fSStephen Warren 406706e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 406806e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 406906e4ae5fSStephen Warren 407006e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 407106e4ae5fSStephen Warren area within the specified MMC device. 407206e4ae5fSStephen Warren 40735c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 40745c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 40755c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 40765c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 40775c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 40785c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 40795c088ee8SStephen Warren maximum possible space before it, to store other data. 40805c088ee8SStephen Warren 408106e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 408206e4ae5fSStephen Warren MMC sector boundary. 408306e4ae5fSStephen Warren 408406e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 408506e4ae5fSStephen Warren 408606e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 408706e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 408806e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 408906e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 409006e4ae5fSStephen Warren 40915c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 40925c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 40935c088ee8SStephen Warren 409406e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 409506e4ae5fSStephen Warren an MMC sector boundary. 409606e4ae5fSStephen Warren 409706e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 409806e4ae5fSStephen Warren 409906e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 410006e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 410106e4ae5fSStephen Warren CONFIG_ENV_SIZE. 410206e4ae5fSStephen Warren 41036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4104c609719bSwdenk 4105c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4106c609719bSwdenk area is used at an early stage (ROM part) if the environment 4107c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4108c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4109c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4110c609719bSwdenk to be a good choice since it makes it far enough from the 4111c609719bSwdenk start of the data area as well as from the stack pointer. 4112c609719bSwdenk 4113e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4114c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4115cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4116c609719bSwdenkuntil then to read environment variables. 4117c609719bSwdenk 411885ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 411985ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 412085ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 412185ec0bccSwdenknecessary, because the first environment variable we need is the 412285ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 412385ec0bccSwdenkhave any device yet where we could complain.] 4124c609719bSwdenk 4125c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4126c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 412785ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4128c609719bSwdenk 41296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4130fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4131fc3e2165Swdenk 41326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4133fc3e2165Swdenk also needs to be defined. 4134fc3e2165Swdenk 41356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4136fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4137c609719bSwdenk 4138f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4139f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4140f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4141f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4142f5675aa5SRon Madrid space for already greatly restricted images, including but not 4143f5675aa5SRon Madrid limited to NAND_SPL configurations. 4144f5675aa5SRon Madrid 4145b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4146b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4147b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4148b2b92f53SSimon Glass to do this. 4149b2b92f53SSimon Glass 4150e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4151e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4152e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4153e2e3e2b1SSimon Glass present. 4154e2e3e2b1SSimon Glass 4155c609719bSwdenkLow Level (hardware related) configuration options: 4156dc7c9a1aSwdenk--------------------------------------------------- 4157c609719bSwdenk 41586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4159c609719bSwdenk Cache Line Size of the CPU. 4160c609719bSwdenk 41616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4162c609719bSwdenk Default address of the IMMR after system reset. 41632535d602Swdenk 41642535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 41652535d602Swdenk and RPXsuper) to be able to adjust the position of 41662535d602Swdenk the IMMR register after a reset. 4167c609719bSwdenk 4168e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4169e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4170e46fedfeSTimur Tabi PowerPC SOCs. 4171e46fedfeSTimur Tabi 4172e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4173e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4174e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4175e46fedfeSTimur Tabi 4176e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4177e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4178e46fedfeSTimur Tabi 4179e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4180e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4181e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4182e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4183e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4184e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4185e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4186e46fedfeSTimur Tabi 4187e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4188e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4189e46fedfeSTimur Tabi 4190e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4191e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4192e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4193e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4194e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4195e46fedfeSTimur Tabi 4196e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4197e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4198e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4199e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4200e46fedfeSTimur Tabi 4201e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4202e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4203e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4204e46fedfeSTimur Tabi 42057f6c2cbcSwdenk- Floppy Disk Support: 42066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 42077f6c2cbcSwdenk 42087f6c2cbcSwdenk the default drive number (default value 0) 42097f6c2cbcSwdenk 42106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 42117f6c2cbcSwdenk 421211ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 42137f6c2cbcSwdenk (default value 1) 42147f6c2cbcSwdenk 42156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 42167f6c2cbcSwdenk 42177f6c2cbcSwdenk defines the offset of register from address. It 42187f6c2cbcSwdenk depends on which part of the data bus is connected to 421911ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 42207f6c2cbcSwdenk 42216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 42226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 42237f6c2cbcSwdenk default value. 42247f6c2cbcSwdenk 42256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 42267f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 42277f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 42287f6c2cbcSwdenk source code. It is used to make hardware dependant 42297f6c2cbcSwdenk initializations. 42307f6c2cbcSwdenk 42310abddf82SMacpaul Lin- CONFIG_IDE_AHB: 42320abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 42330abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 42340abddf82SMacpaul Lin When software is doing ATA command and data transfer to 42350abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 42360abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 42370abddf82SMacpaul Lin is requierd. 42380abddf82SMacpaul Lin 42396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 424025d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 424125d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4242c609719bSwdenk 42436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4244c609719bSwdenk 42457152b1d0Swdenk Start address of memory area that can be used for 4246c609719bSwdenk initial data and stack; please note that this must be 4247c609719bSwdenk writable memory that is working WITHOUT special 4248c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4249c609719bSwdenk will become available only after programming the 4250c609719bSwdenk memory controller and running certain initialization 4251c609719bSwdenk sequences. 4252c609719bSwdenk 4253c609719bSwdenk U-Boot uses the following memory types: 4254c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4255c609719bSwdenk - MPC824X: data cache 4256c609719bSwdenk - PPC4xx: data cache 4257c609719bSwdenk 42586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4259c609719bSwdenk 4260c609719bSwdenk Offset of the initial data structure in the memory 42616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 42626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4263c609719bSwdenk data is located at the end of the available space 4264553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 42656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 42666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 42676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4268c609719bSwdenk 4269c609719bSwdenk Note: 4270c609719bSwdenk On the MPC824X (or other systems that use the data 4271c609719bSwdenk cache for initial memory) the address chosen for 42726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4273c609719bSwdenk point to an otherwise UNUSED address space between 4274c609719bSwdenk the top of RAM and the start of the PCI space. 4275c609719bSwdenk 42766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4277c609719bSwdenk 42786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4279c609719bSwdenk 42806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4281c609719bSwdenk 42826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4283c609719bSwdenk 42846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4285c609719bSwdenk 42866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4287c609719bSwdenk 42886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4289c609719bSwdenk SDRAM timing 4290c609719bSwdenk 42916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4292c609719bSwdenk periodic timer for refresh 4293c609719bSwdenk 42946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4295c609719bSwdenk 42966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 42976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 42986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 42996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4300c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4301c609719bSwdenk 4302c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 43036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 43046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4305c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4306c609719bSwdenk 43076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 43086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4309c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4310c609719bSwdenk Prescaler definitions (SDRAM timing) 4311c609719bSwdenk 43126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4313c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4314c609719bSwdenk define relocation offset in DPRAM [DSP2] 4315c609719bSwdenk 43166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4317b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4318b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4319b423d055SHeiko Schocher 43206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4321c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4322c609719bSwdenk define relocation offset in DPRAM [SCC4] 4323c609719bSwdenk 43246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4325c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4326c609719bSwdenk wrong setting might damage your board. Read 4327c609719bSwdenk doc/README.MBX before setting this variable! 4328c609719bSwdenk 43296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4330ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4331ea909b76Swdenk (Power On Self Tests). This definition overrides 4332ea909b76Swdenk #define'd default value in commproc.h resp. 4333ea909b76Swdenk cpm_8260.h. 4334ea909b76Swdenk 43356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 43366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 43376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 43386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 43396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 43406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 43416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 43426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4343a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 43445d232d0eSwdenk 43459cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 43469cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 43479cacf4fcSDirk Eibach required. 43489cacf4fcSDirk Eibach 434969fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 435069fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 435169fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 435269fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 435369fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 435469fd2d3bSAndrew Sharp by coreboot or similar. 435569fd2d3bSAndrew Sharp 4356842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4357842033e6SGabor Juhos Enable support for indirect PCI bridges. 4358842033e6SGabor Juhos 4359a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4360a09b9b68SKumar Gala Chip has SRIO or not 4361a09b9b68SKumar Gala 4362a09b9b68SKumar Gala- CONFIG_SRIO1: 4363a09b9b68SKumar Gala Board has SRIO 1 port available 4364a09b9b68SKumar Gala 4365a09b9b68SKumar Gala- CONFIG_SRIO2: 4366a09b9b68SKumar Gala Board has SRIO 2 port available 4367a09b9b68SKumar Gala 4368c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4369c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4370c8b28152SLiu Gang 4371a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4372a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4373a09b9b68SKumar Gala 4374a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4375a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4376a09b9b68SKumar Gala 4377a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4378a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4379a09b9b68SKumar Gala 438066bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 438166bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 438266bd1846SFabio Estevam a 16 bit bus. 438366bd1846SFabio Estevam Not all NAND drivers use this symbol. 4384a430e916SFabio Estevam Example of drivers that use it: 438566bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4386a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4387eced4626SAlex Waterman 4388eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4389eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4390eced4626SAlex Waterman a default value will be used. 4391eced4626SAlex Waterman 4392bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4393218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4394218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4395218ca724SWolfgang Denk 4396bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4397bb99ad6dSBen Warren I2C address of the SPD EEPROM 4398bb99ad6dSBen Warren 43996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4400218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4401218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4402218ca724SWolfgang Denk to something your driver can deal with. 4403bb99ad6dSBen Warren 44041b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 44051b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 44061b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 44071b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 44081b3e3c4fSYork Sun header files or board specific files. 44091b3e3c4fSYork Sun 44106f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 44116f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 44126f5e1dc5SYork Sun 44136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4414218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4415218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 44162ad6b513STimur Tabi 4417c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4418c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4419c26e454dSwdenk 4420c26e454dSwdenk- CONFIG_FEC[12]_PHY 4421c26e454dSwdenk Define to the hardcoded PHY address which corresponds 44226e592385Swdenk to the given FEC; i. e. 4423c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4424c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4425c26e454dSwdenk 4426c26e454dSwdenk When set to -1, means to probe for first available. 4427c26e454dSwdenk 4428c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4429c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4430c26e454dSwdenk (so program the FEC to ignore it). 4431c26e454dSwdenk 4432c26e454dSwdenk- CONFIG_RMII 4433c26e454dSwdenk Enable RMII mode for all FECs. 4434c26e454dSwdenk Note that this is a global option, we can't 4435c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4436c26e454dSwdenk 44375cf91d6bSwdenk- CONFIG_CRC32_VERIFY 44385cf91d6bSwdenk Add a verify option to the crc32 command. 44395cf91d6bSwdenk The syntax is: 44405cf91d6bSwdenk 44415cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 44425cf91d6bSwdenk 44435cf91d6bSwdenk Where address/count indicate a memory area 44445cf91d6bSwdenk and crc32 is the correct crc32 which the 44455cf91d6bSwdenk area should have. 44465cf91d6bSwdenk 444756523f12Swdenk- CONFIG_LOOPW 444856523f12Swdenk Add the "loopw" memory command. This only takes effect if 4449602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 445056523f12Swdenk 44517b466641Sstroese- CONFIG_MX_CYCLIC 44527b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 44537b466641Sstroese "md/mw" commands. 44547b466641Sstroese Examples: 44557b466641Sstroese 44567b466641Sstroese => mdc.b 10 4 500 44577b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 44587b466641Sstroese 44597b466641Sstroese => mwc.l 100 12345678 10 44607b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 44617b466641Sstroese 44627b466641Sstroese This only takes effect if the memory commands are activated 4463602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 44647b466641Sstroese 44658aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4466afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4467e03f3169SWolfgang Denk low level initializations (like setting up the memory 4468e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4469e03f3169SWolfgang Denk relocate itself into RAM. 44708aa1a2d1Swdenk 4471e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4472e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4473e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4474e03f3169SWolfgang Denk these initializations itself. 44758aa1a2d1Swdenk 4476401bb30bSAneesh V- CONFIG_SPL_BUILD 4477df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4478df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4479df81238bSMagnus Lilja compiling a NAND SPL. 4480400558b5Swdenk 44813aa29de0SYing Zhang- CONFIG_TPL_BUILD 44823aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 44833aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 44843aa29de0SYing Zhang It is loaded by the SPL. 44853aa29de0SYing Zhang 44865df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 44875df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 44885df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 44895df572f0SYing Zhang previous 4k of the .text section. 44905df572f0SYing Zhang 44914213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 44924213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 44934213fc29SSimon Glass effective address. It is therefore not necessary to regard 44944213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 44954213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 44964213fc29SSimon Glass it maintains its own little RAM buffer which contains all 44974213fc29SSimon Glass addressable memory. This option causes some memory accesses 44984213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 44994213fc29SSimon Glass 4500d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4501d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4502d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4503d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4504d8834a13SMatthias Weisser conditions but may increase the binary size. 4505d8834a13SMatthias Weisser 4506588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4507588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4508588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4509b16f521aSGabe Black 4510fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4511fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4512fc33705eSMark Jackson 4513fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 45145b5ece9eSGabe Black 451516678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 451616678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 451716678eb4SHeiko Schocher 4518f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4519f2717b47STimur Tabi----------------------------------- 4520f2717b47STimur Tabi 4521f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4522f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4523f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4524f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4525f2717b47STimur Tabiwithin that device. 4526f2717b47STimur Tabi 4527dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4528dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4529dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4530dcf1d774SZhao Qiang is also specified. 4531dcf1d774SZhao Qiang 4532dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4533dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4534f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4535f2717b47STimur Tabi is also specified. 4536f2717b47STimur Tabi 4537f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4538f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4539f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4540f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4541f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4542f2717b47STimur Tabi 4543f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4544f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4545f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4546f2717b47STimur Tabi virtual address in NOR flash. 4547f2717b47STimur Tabi 4548f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4549f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4550f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4551f2717b47STimur Tabi 4552f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4553f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4554f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4555f2717b47STimur Tabi 4556f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4557f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4558f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4559f2717b47STimur Tabi 4560292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4561292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4562292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4563fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4564fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4565fc54c7faSLiu Gang master's memory space. 4566f2717b47STimur Tabi 4567c609719bSwdenkBuilding the Software: 4568c609719bSwdenk====================== 4569c609719bSwdenk 4570218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4571218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4572218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4573218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4574218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4575218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4576c609719bSwdenk 4577218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4578218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4579218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4580218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4581218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4582c609719bSwdenk 4583218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4584218ca724SWolfgang Denk $ export CROSS_COMPILE 4585c609719bSwdenk 45862f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 45872f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 45882f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 45892f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 45902f8d396bSPeter Tyser 45912f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 45922f8d396bSPeter Tyser 45932f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 45942f8d396bSPeter Tyser be executed on computers running Windows. 45952f8d396bSPeter Tyser 4596c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4597c609719bSwdenksources you must configure U-Boot for one specific board type. This 4598c609719bSwdenkis done by typing: 4599c609719bSwdenk 4600c609719bSwdenk make NAME_config 4601c609719bSwdenk 4602218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 46034d675ae6SMichael Jonesrations; see boards.cfg for supported names. 460454387ac9Swdenk 4605c609719bSwdenkNote: for some board special configuration names may exist; check if 4606c609719bSwdenk additional information is available from the board vendor; for 46072729af9dSwdenk instance, the TQM823L systems are available without (standard) 46082729af9dSwdenk or with LCD support. You can select such additional "features" 460911ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4610c609719bSwdenk 46112729af9dSwdenk make TQM823L_config 46122729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4613c609719bSwdenk 4614c609719bSwdenk make TQM823L_LCD_config 4615c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4616c609719bSwdenk 4617c609719bSwdenk etc. 4618c609719bSwdenk 4619c609719bSwdenk 4620c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 46217152b1d0Swdenkimages ready for download to / installation on your system: 4622c609719bSwdenk 4623c609719bSwdenk- "u-boot.bin" is a raw binary image 4624c609719bSwdenk- "u-boot" is an image in ELF binary format 4625c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4626c609719bSwdenk 4627baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4628baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4629baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4630baf31249SMarian Balakowicz 4631baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4632baf31249SMarian Balakowicz 4633baf31249SMarian Balakowicz make O=/tmp/build distclean 4634baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4635baf31249SMarian Balakowicz make O=/tmp/build all 4636baf31249SMarian Balakowicz 4637baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4638baf31249SMarian Balakowicz 4639baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4640baf31249SMarian Balakowicz make distclean 4641baf31249SMarian Balakowicz make NAME_config 4642baf31249SMarian Balakowicz make all 4643baf31249SMarian Balakowicz 4644baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4645baf31249SMarian Balakowiczvariable. 4646baf31249SMarian Balakowicz 4647c609719bSwdenk 4648c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4649c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4650c609719bSwdenknative "make". 4651c609719bSwdenk 4652c609719bSwdenk 4653c609719bSwdenkIf the system board that you have is not listed, then you will need 4654c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4655c609719bSwdenksteps: 4656c609719bSwdenk 4657c609719bSwdenk1. Add a new configuration option for your board to the toplevel 46584d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 46594d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4660c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 466185ec0bccSwdenk files you need. In your board directory, you will need at least 466285ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 466385ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 466485ec0bccSwdenk your board 4665c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4666c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 466785ec0bccSwdenk4. Run "make <board>_config" with your new name. 4668c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4669c609719bSwdenk to be installed on your target system. 467085ec0bccSwdenk6. Debug and solve any problems that might arise. 4671c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4672c609719bSwdenk 4673c609719bSwdenk 4674c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4675c609719bSwdenk============================================================== 4676c609719bSwdenk 4677c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4678c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4679c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4680c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4681218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4682c609719bSwdenk 4683c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4684c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4685c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4686c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4687c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 46887152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4689218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4690218ca724SWolfgang Denkyou can type 4691c609719bSwdenk 4692c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4693c609719bSwdenk 4694c609719bSwdenkor to build on a native PowerPC system you can type 4695c609719bSwdenk 4696c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4697c609719bSwdenk 4698218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4699218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4700218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4701218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4702218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4703218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4704218ca724SWolfgang Denkvariable. For example: 4705baf31249SMarian Balakowicz 4706baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4707baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4708baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4709baf31249SMarian Balakowicz 4710218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4711218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4712218ca724SWolfgang Denkduring the whole build process. 4713baf31249SMarian Balakowicz 4714baf31249SMarian Balakowicz 4715c609719bSwdenkSee also "U-Boot Porting Guide" below. 4716c609719bSwdenk 4717c609719bSwdenk 4718c609719bSwdenkMonitor Commands - Overview: 4719c609719bSwdenk============================ 4720c609719bSwdenk 4721c609719bSwdenkgo - start application at address 'addr' 4722c609719bSwdenkrun - run commands in an environment variable 4723c609719bSwdenkbootm - boot application image from memory 4724c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 472544f074c7SMarek Vasutbootz - boot zImage from memory 4726c609719bSwdenktftpboot- boot image via network using TFTP protocol 4727c609719bSwdenk and env variables "ipaddr" and "serverip" 4728c609719bSwdenk (and eventually "gatewayip") 47291fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4730c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4731c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4732c609719bSwdenkloads - load S-Record file over serial line 4733c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4734c609719bSwdenkmd - memory display 4735c609719bSwdenkmm - memory modify (auto-incrementing) 4736c609719bSwdenknm - memory modify (constant address) 4737c609719bSwdenkmw - memory write (fill) 4738c609719bSwdenkcp - memory copy 4739c609719bSwdenkcmp - memory compare 4740c609719bSwdenkcrc32 - checksum calculation 47410f89c54bSPeter Tyseri2c - I2C sub-system 4742c609719bSwdenksspi - SPI utility commands 4743c609719bSwdenkbase - print or set address offset 4744c609719bSwdenkprintenv- print environment variables 4745c609719bSwdenksetenv - set environment variables 4746c609719bSwdenksaveenv - save environment variables to persistent storage 4747c609719bSwdenkprotect - enable or disable FLASH write protection 4748c609719bSwdenkerase - erase FLASH memory 4749c609719bSwdenkflinfo - print FLASH memory information 475010635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4751c609719bSwdenkbdinfo - print Board Info structure 4752c609719bSwdenkiminfo - print header information for application image 4753c609719bSwdenkconinfo - print console devices and informations 4754c609719bSwdenkide - IDE sub-system 4755c609719bSwdenkloop - infinite loop on address range 475656523f12Swdenkloopw - infinite write loop on address range 4757c609719bSwdenkmtest - simple RAM test 4758c609719bSwdenkicache - enable or disable instruction cache 4759c609719bSwdenkdcache - enable or disable data cache 4760c609719bSwdenkreset - Perform RESET of the CPU 4761c609719bSwdenkecho - echo args to console 4762c609719bSwdenkversion - print monitor version 4763c609719bSwdenkhelp - print online help 4764c609719bSwdenk? - alias for 'help' 4765c609719bSwdenk 4766c609719bSwdenk 4767c609719bSwdenkMonitor Commands - Detailed Description: 4768c609719bSwdenk======================================== 4769c609719bSwdenk 4770c609719bSwdenkTODO. 4771c609719bSwdenk 4772c609719bSwdenkFor now: just type "help <command>". 4773c609719bSwdenk 4774c609719bSwdenk 4775c609719bSwdenkEnvironment Variables: 4776c609719bSwdenk====================== 4777c609719bSwdenk 4778c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4779c609719bSwdenkcan be made persistent by saving to Flash memory. 4780c609719bSwdenk 4781c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4782c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4783c609719bSwdenkwithout a value can be used to delete a variable from the 4784c609719bSwdenkenvironment. As long as you don't save the environment you are 4785c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4786c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4787c609719bSwdenk 4788c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4789c96f86eeSWolfgang Denk 4790c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4791c609719bSwdenk 4792c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4793c609719bSwdenk 4794c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4795c609719bSwdenk 4796c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4797c609719bSwdenk 4798c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4799c609719bSwdenk 4800c609719bSwdenk bootfile - Name of the image to load with TFTP 4801c609719bSwdenk 48027d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 48037d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48047d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 48057d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 48067d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 48077d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4808c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4809c3624e6eSGrant Likely bootm_mapsize. 4810c3624e6eSGrant Likely 4811c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4812c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4813c3624e6eSGrant Likely defines the size of the memory region starting at base 4814c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4815c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4816c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4817c3624e6eSGrant Likely used otherwise. 48187d721e34SBartlomiej Sieka 48197d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 48207d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48217d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 48227d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 48237d721e34SBartlomiej Sieka environment variable. 48247d721e34SBartlomiej Sieka 48254bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 48264bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 48274bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 48284bae9090SBartlomiej Sieka 4829c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4830c609719bSwdenk "bootp" will just load perform a lookup of the 4831c609719bSwdenk configuration from the BOOTP server, but not try to 4832c609719bSwdenk load any image using TFTP 4833c609719bSwdenk 4834c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4835c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4836c609719bSwdenk be automatically started (by internally calling 4837c609719bSwdenk "bootm") 4838c609719bSwdenk 48394a6fd34bSwdenk If set to "no", a standalone image passed to the 48404a6fd34bSwdenk "bootm" command will be copied to the load address 48414a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 48424a6fd34bSwdenk This can be used to load and uncompress arbitrary 48434a6fd34bSwdenk data. 48444a6fd34bSwdenk 4845a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4846a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4847fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4848fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4849fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4850fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4851fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4852fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4853fa34f6b2SShawn Guo access it during the boot procedure. 4854fa34f6b2SShawn Guo 4855a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4856a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4857a28afca5SDavid A. Long to work it must reside in writable memory, have 4858a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4859a28afca5SDavid A. Long add the information it needs into it, and the memory 4860a28afca5SDavid A. Long must be accessible by the kernel. 4861a28afca5SDavid A. Long 4862eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4863eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4864eea63e05SSimon Glass defined. 4865eea63e05SSimon Glass 486617ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 486717ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 486817ea1177Swdenk mode (400kHZ). This environment variable is used in 486917ea1177Swdenk initialization code. So, for changes to be effective 487017ea1177Swdenk it must be saved and board must be reset. 487117ea1177Swdenk 4872c609719bSwdenk initrd_high - restrict positioning of initrd images: 4873c609719bSwdenk If this variable is not set, initrd images will be 4874c609719bSwdenk copied to the highest possible address in RAM; this 4875c609719bSwdenk is usually what you want since it allows for 4876c609719bSwdenk maximum initrd size. If for some reason you want to 4877c609719bSwdenk make sure that the initrd image is loaded below the 48786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4879c609719bSwdenk variable to a value of "no" or "off" or "0". 4880c609719bSwdenk Alternatively, you can set it to a maximum upper 4881c609719bSwdenk address to use (U-Boot will still check that it 4882c609719bSwdenk does not overwrite the U-Boot stack and data). 4883c609719bSwdenk 4884c609719bSwdenk For instance, when you have a system with 16 MB 48857152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4886c609719bSwdenk you can do this by adding "mem=12M" to the value of 4887c609719bSwdenk the "bootargs" variable. However, now you must make 48887152b1d0Swdenk sure that the initrd image is placed in the first 4889c609719bSwdenk 12 MB as well - this can be done with 4890c609719bSwdenk 4891c609719bSwdenk setenv initrd_high 00c00000 4892c609719bSwdenk 489338b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 489438b99261Swdenk indication to U-Boot that all addresses are legal 489538b99261Swdenk for the Linux kernel, including addresses in flash 489638b99261Swdenk memory. In this case U-Boot will NOT COPY the 489738b99261Swdenk ramdisk at all. This may be useful to reduce the 489838b99261Swdenk boot time on your system, but requires that this 489938b99261Swdenk feature is supported by your Linux kernel. 490038b99261Swdenk 4901c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4902c609719bSwdenk 4903c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4904dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4905c609719bSwdenk 4906c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4907c609719bSwdenk 4908c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4909c609719bSwdenk 4910c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4911c609719bSwdenk 4912c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4913c609719bSwdenk 4914c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4915c609719bSwdenk 4916e2a53458SMike Frysinger ethprime - controls which interface is used first. 4917a3d991bdSwdenk 4918e2a53458SMike Frysinger ethact - controls which interface is currently active. 4919e2a53458SMike Frysinger For example you can do the following 4920a3d991bdSwdenk 492148690d80SHeiko Schocher => setenv ethact FEC 492248690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 492348690d80SHeiko Schocher => setenv ethact SCC 492448690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4925a3d991bdSwdenk 4926e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4927e1692577SMatthias Fuchs available network interfaces. 4928e1692577SMatthias Fuchs It just stays at the currently selected interface. 4929e1692577SMatthias Fuchs 4930a3d991bdSwdenk netretry - When set to "no" each network operation will 4931a3d991bdSwdenk either succeed or fail without retrying. 49326e592385Swdenk When set to "once" the network operation will 49336e592385Swdenk fail when all the available network interfaces 49346e592385Swdenk are tried once without success. 4935a3d991bdSwdenk Useful on scripts which control the retry operation 4936a3d991bdSwdenk themselves. 4937a3d991bdSwdenk 4938b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4939a1cf027aSJean-Christophe PLAGNIOL-VILLARD 49408d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 49418d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 49428d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 49438d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 49448d51aacdSSimon Glass is silent. 49458d51aacdSSimon Glass 494628cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4947ecb0ccd9SWolfgang Denk UDP source port. 4948ecb0ccd9SWolfgang Denk 494928cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 495028cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 495128cb9375SWolfgang Denk 4952c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4953c96f86eeSWolfgang Denk we use the TFTP server's default block size 4954c96f86eeSWolfgang Denk 4955c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4956c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4957c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4958c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4959c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4960c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4961c96f86eeSWolfgang Denk with unreliable TFTP servers. 4962c96f86eeSWolfgang Denk 4963a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 496411ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4965a3d991bdSwdenk VLAN tagged frames. 4966c609719bSwdenk 4967dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4968dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4969dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4970dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4971dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4972dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4973dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4974dc0b7b0eSJason Hobbs 4975dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4976dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4977dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4978dc0b7b0eSJason Hobbs 4979dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4980dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4981dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4982dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4983dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4984dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4985dc0b7b0eSJason Hobbs 4986c609719bSwdenkThe following environment variables may be used and automatically 4987c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4988c609719bSwdenkdepending the information provided by your boot server: 4989c609719bSwdenk 4990c609719bSwdenk bootfile - see above 4991c609719bSwdenk dnsip - IP address of your Domain Name Server 4992fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4993c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4994c609719bSwdenk hostname - Target hostname 4995c609719bSwdenk ipaddr - see above 4996c609719bSwdenk netmask - Subnet Mask 4997c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4998c609719bSwdenk serverip - see above 4999c609719bSwdenk 5000c609719bSwdenk 5001c609719bSwdenkThere are two special Environment Variables: 5002c609719bSwdenk 5003c609719bSwdenk serial# - contains hardware identification information such 5004c609719bSwdenk as type string and/or serial number 5005c609719bSwdenk ethaddr - Ethernet address 5006c609719bSwdenk 5007c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5008c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5009c609719bSwdenkonce they have been set once. 5010c609719bSwdenk 5011c609719bSwdenk 5012c1551ea8SstroeseFurther special Environment Variables: 5013c1551ea8Sstroese 5014c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5015c1551ea8Sstroese with the "version" command. This variable is 5016c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5017c1551ea8Sstroese 5018c1551ea8Sstroese 5019c609719bSwdenkPlease note that changes to some configuration parameters may take 5020c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5021c609719bSwdenk 5022c609719bSwdenk 5023170ab110SJoe HershbergerCallback functions for environment variables: 5024170ab110SJoe Hershberger--------------------------------------------- 5025170ab110SJoe Hershberger 5026170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5027170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5028170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5029170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5030170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5031170ab110SJoe Hershberger 5032170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5033170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5034170ab110SJoe Hershberger 5035170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5036170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5037170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5038170ab110SJoe Hershbergerassociations. The list must be in the following format: 5039170ab110SJoe Hershberger 5040170ab110SJoe Hershberger entry = variable_name[:callback_name] 5041170ab110SJoe Hershberger list = entry[,list] 5042170ab110SJoe Hershberger 5043170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5044170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5045170ab110SJoe Hershberger 5046170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5047170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5048170ab110SJoe Hershbergeroverride any association in the static list. You can define 5049170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5050170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5051170ab110SJoe Hershberger 5052170ab110SJoe Hershberger 5053f07771ccSwdenkCommand Line Parsing: 5054f07771ccSwdenk===================== 5055f07771ccSwdenk 5056f07771ccSwdenkThere are two different command line parsers available with U-Boot: 50577152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5058f07771ccSwdenk 5059f07771ccSwdenkOld, simple command line parser: 5060f07771ccSwdenk-------------------------------- 5061f07771ccSwdenk 5062f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5063f07771ccSwdenk- several commands on one line, separated by ';' 5064fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5065f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5066f07771ccSwdenk for example: 5067fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5068f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5069f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5070f07771ccSwdenk 5071f07771ccSwdenkHush shell: 5072f07771ccSwdenk----------- 5073f07771ccSwdenk 5074f07771ccSwdenk- similar to Bourne shell, with control structures like 5075f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5076f07771ccSwdenk until...do...done, ... 5077f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5078f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5079f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5080f07771ccSwdenk command 5081f07771ccSwdenk 5082f07771ccSwdenkGeneral rules: 5083f07771ccSwdenk-------------- 5084f07771ccSwdenk 5085f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5086f07771ccSwdenk command) contains several commands separated by semicolon, and 5087f07771ccSwdenk one of these commands fails, then the remaining commands will be 5088f07771ccSwdenk executed anyway. 5089f07771ccSwdenk 5090f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 509111ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5092f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5093f07771ccSwdenk variables are not executed. 5094f07771ccSwdenk 5095c609719bSwdenkNote for Redundant Ethernet Interfaces: 5096c609719bSwdenk======================================= 5097c609719bSwdenk 509811ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5099c609719bSwdenksuch configurations and is capable of automatic selection of a 51007152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5101c609719bSwdenk 5102c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5103c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5104c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5105c609719bSwdenk 5106c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5107c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5108c609719bSwdenkding setting in the environment; if the corresponding environment 5109c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5110c609719bSwdenk 5111c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5112c609719bSwdenk environment, the SROM's address is used. 5113c609719bSwdenk 5114c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5115c609719bSwdenk environment exists, then the value from the environment variable is 5116c609719bSwdenk used. 5117c609719bSwdenk 5118c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5119c609719bSwdenk both addresses are the same, this MAC address is used. 5120c609719bSwdenk 5121c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5122c609719bSwdenk addresses differ, the value from the environment is used and a 5123c609719bSwdenk warning is printed. 5124c609719bSwdenk 5125c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5126c609719bSwdenk is raised. 5127c609719bSwdenk 5128ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5129ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5130ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5131ecee9324SBen WarrenThe naming convention is as follows: 5132ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5133c609719bSwdenk 5134c609719bSwdenkImage Formats: 5135c609719bSwdenk============== 5136c609719bSwdenk 51373310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 51383310c549SMarian Balakowiczimages in two formats: 51393310c549SMarian Balakowicz 51403310c549SMarian BalakowiczNew uImage format (FIT) 51413310c549SMarian Balakowicz----------------------- 51423310c549SMarian Balakowicz 51433310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 51443310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 51453310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 51463310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 51473310c549SMarian Balakowicz 51483310c549SMarian Balakowicz 51493310c549SMarian BalakowiczOld uImage format 51503310c549SMarian Balakowicz----------------- 51513310c549SMarian Balakowicz 51523310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 51533310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 51543310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5155c609719bSwdenk 5156c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5157c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5158f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5159f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5160f5ed9e39SPeter Tyser INTEGRITY). 51617b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5162afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5163afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5164c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5165c609719bSwdenk* Load Address 5166c609719bSwdenk* Entry Point 5167c609719bSwdenk* Image Name 5168c609719bSwdenk* Image Timestamp 5169c609719bSwdenk 5170c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5171c609719bSwdenkand the data portions of the image are secured against corruption by 5172c609719bSwdenkCRC32 checksums. 5173c609719bSwdenk 5174c609719bSwdenk 5175c609719bSwdenkLinux Support: 5176c609719bSwdenk============== 5177c609719bSwdenk 5178c609719bSwdenkAlthough U-Boot should support any OS or standalone application 51797152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5180c609719bSwdenkU-Boot. 5181c609719bSwdenk 5182c609719bSwdenkU-Boot includes many features that so far have been part of some 5183c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5184c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5185c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 51867152b1d0Swdenkserves several purposes: 5187c609719bSwdenk 5188c609719bSwdenk- the same features can be used for other OS or standalone 5189c609719bSwdenk applications (for instance: using compressed images to reduce the 5190c609719bSwdenk Flash memory footprint) 5191c609719bSwdenk 5192c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 51937152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5194c609719bSwdenk 5195c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5196c609719bSwdenk images; of course this also means that different kernel images can 5197c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5198c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5199c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5200c609719bSwdenk software is easier now. 5201c609719bSwdenk 5202c609719bSwdenk 5203c609719bSwdenkLinux HOWTO: 5204c609719bSwdenk============ 5205c609719bSwdenk 5206c609719bSwdenkPorting Linux to U-Boot based systems: 5207c609719bSwdenk--------------------------------------- 5208c609719bSwdenk 5209c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5210c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5211c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5212c609719bSwdenkLinux :-). 5213c609719bSwdenk 5214a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5215c609719bSwdenk 5216c609719bSwdenkJust make sure your machine specific header file (for instance 5217c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 52181dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 52191dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 52206d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5221c609719bSwdenk 5222c609719bSwdenk 5223c609719bSwdenkConfiguring the Linux kernel: 5224c609719bSwdenk----------------------------- 5225c609719bSwdenk 5226c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5227c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5228c609719bSwdenk 5229c609719bSwdenk 5230c609719bSwdenkBuilding a Linux Image: 5231c609719bSwdenk----------------------- 5232c609719bSwdenk 523324ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 523424ee89b9Swdenknot used. If you use recent kernel source, a new build target 523524ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 523624ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 523724ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 523824ee89b9Swdenk100% compatible format. 5239c609719bSwdenk 5240c609719bSwdenkExample: 5241c609719bSwdenk 5242c609719bSwdenk make TQM850L_config 5243c609719bSwdenk make oldconfig 5244c609719bSwdenk make dep 524524ee89b9Swdenk make uImage 5246c609719bSwdenk 524724ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 524824ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 524924ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5250c609719bSwdenk 525124ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 525224ee89b9Swdenk 525324ee89b9Swdenk* convert the kernel into a raw binary image: 525424ee89b9Swdenk 525524ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 525624ee89b9Swdenk -R .note -R .comment \ 525724ee89b9Swdenk -S vmlinux linux.bin 525824ee89b9Swdenk 525924ee89b9Swdenk* compress the binary image: 526024ee89b9Swdenk 526124ee89b9Swdenk gzip -9 linux.bin 526224ee89b9Swdenk 526324ee89b9Swdenk* package compressed binary image for U-Boot: 526424ee89b9Swdenk 526524ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 526624ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 526724ee89b9Swdenk -d linux.bin.gz uImage 526824ee89b9Swdenk 526924ee89b9Swdenk 527024ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 527124ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 527224ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 527324ee89b9Swdenkbyte header containing information about target architecture, 527424ee89b9Swdenkoperating system, image type, compression method, entry points, time 527524ee89b9Swdenkstamp, CRC32 checksums, etc. 527624ee89b9Swdenk 527724ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 527824ee89b9Swdenkprint the header information, or to build new images. 5279c609719bSwdenk 5280c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5281c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5282c609719bSwdenkchecksum verification: 5283c609719bSwdenk 5284c609719bSwdenk tools/mkimage -l image 5285c609719bSwdenk -l ==> list image header information 5286c609719bSwdenk 5287c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5288c609719bSwdenkfrom a "data file" which is used as image payload: 5289c609719bSwdenk 5290c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5291c609719bSwdenk -n name -d data_file image 5292c609719bSwdenk -A ==> set architecture to 'arch' 5293c609719bSwdenk -O ==> set operating system to 'os' 5294c609719bSwdenk -T ==> set image type to 'type' 5295c609719bSwdenk -C ==> set compression type 'comp' 5296c609719bSwdenk -a ==> set load address to 'addr' (hex) 5297c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5298c609719bSwdenk -n ==> set image name to 'name' 5299c609719bSwdenk -d ==> use image data from 'datafile' 5300c609719bSwdenk 530169459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 530269459791Swdenkaddress (0x00000000), but the entry point address depends on the 530369459791Swdenkkernel version: 5304c609719bSwdenk 5305c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 530624ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5307c609719bSwdenk 5308c609719bSwdenkSo a typical call to build a U-Boot image would read: 5309c609719bSwdenk 531024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 531124ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5312a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 531324ee89b9Swdenk > examples/uImage.TQM850L 531424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5315c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5316c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5317c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5318c609719bSwdenk Load Address: 0x00000000 531924ee89b9Swdenk Entry Point: 0x00000000 5320c609719bSwdenk 5321c609719bSwdenkTo verify the contents of the image (or check for corruption): 5322c609719bSwdenk 532324ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 532424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5325c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5326c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5327c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5328c609719bSwdenk Load Address: 0x00000000 532924ee89b9Swdenk Entry Point: 0x00000000 5330c609719bSwdenk 5331c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5332c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5333c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5334c609719bSwdenkneed to be uncompressed: 5335c609719bSwdenk 5336a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 533724ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 533824ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5339a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 534024ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 534124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5342c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5343c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5344c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5345c609719bSwdenk Load Address: 0x00000000 534624ee89b9Swdenk Entry Point: 0x00000000 5347c609719bSwdenk 5348c609719bSwdenk 5349c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5350c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5351c609719bSwdenk 5352c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5353c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5354c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5355c609719bSwdenk Image Name: Simple Ramdisk Image 5356c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5357c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5358c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5359c609719bSwdenk Load Address: 0x00000000 5360c609719bSwdenk Entry Point: 0x00000000 5361c609719bSwdenk 5362a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5363a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5364a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5365a804b5ceSGuilherme Maciel Ferreirafrom the image: 5366a804b5ceSGuilherme Maciel Ferreira 5367a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5368a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5369a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5370a804b5ceSGuilherme Maciel Ferreira 5371c609719bSwdenk 5372c609719bSwdenkInstalling a Linux Image: 5373c609719bSwdenk------------------------- 5374c609719bSwdenk 5375c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5376c609719bSwdenkyou must convert the image to S-Record format: 5377c609719bSwdenk 5378c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5379c609719bSwdenk 5380c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5381c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5382c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5383c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5384c609719bSwdenkcommand. 5385c609719bSwdenk 5386c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5387c609719bSwdenkTQM8xxL is in the first Flash bank): 5388c609719bSwdenk 5389c609719bSwdenk => erase 40100000 401FFFFF 5390c609719bSwdenk 5391c609719bSwdenk .......... done 5392c609719bSwdenk Erased 8 sectors 5393c609719bSwdenk 5394c609719bSwdenk => loads 40100000 5395c609719bSwdenk ## Ready for S-Record download ... 5396c609719bSwdenk ~>examples/image.srec 5397c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5398c609719bSwdenk ... 5399c609719bSwdenk 15989 15990 15991 15992 5400c609719bSwdenk [file transfer complete] 5401c609719bSwdenk [connected] 5402c609719bSwdenk ## Start Addr = 0x00000000 5403c609719bSwdenk 5404c609719bSwdenk 5405c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5406c609719bSwdenkthis includes a checksum verification so you can be sure no data 5407c609719bSwdenkcorruption happened: 5408c609719bSwdenk 5409c609719bSwdenk => imi 40100000 5410c609719bSwdenk 5411c609719bSwdenk ## Checking Image at 40100000 ... 5412c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5413c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5414c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5415c609719bSwdenk Load Address: 00000000 5416c609719bSwdenk Entry Point: 0000000c 5417c609719bSwdenk Verifying Checksum ... OK 5418c609719bSwdenk 5419c609719bSwdenk 5420c609719bSwdenkBoot Linux: 5421c609719bSwdenk----------- 5422c609719bSwdenk 5423c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5424c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5425c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5426c609719bSwdenkparameters. You can check and modify this variable using the 5427c609719bSwdenk"printenv" and "setenv" commands: 5428c609719bSwdenk 5429c609719bSwdenk 5430c609719bSwdenk => printenv bootargs 5431c609719bSwdenk bootargs=root=/dev/ram 5432c609719bSwdenk 5433c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5434c609719bSwdenk 5435c609719bSwdenk => printenv bootargs 5436c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5437c609719bSwdenk 5438c609719bSwdenk => bootm 40020000 5439c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5440c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5441c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5442c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5443c609719bSwdenk Load Address: 00000000 5444c609719bSwdenk Entry Point: 0000000c 5445c609719bSwdenk Verifying Checksum ... OK 5446c609719bSwdenk Uncompressing Kernel Image ... OK 5447c609719bSwdenk 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 5448c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5449c609719bSwdenk time_init: decrementer frequency = 187500000/60 5450c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5451c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5452c609719bSwdenk ... 5453c609719bSwdenk 545411ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 54557152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5456c609719bSwdenkformat!) to the "bootm" command: 5457c609719bSwdenk 5458c609719bSwdenk => imi 40100000 40200000 5459c609719bSwdenk 5460c609719bSwdenk ## Checking Image at 40100000 ... 5461c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5462c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5463c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5464c609719bSwdenk Load Address: 00000000 5465c609719bSwdenk Entry Point: 0000000c 5466c609719bSwdenk Verifying Checksum ... OK 5467c609719bSwdenk 5468c609719bSwdenk ## Checking Image at 40200000 ... 5469c609719bSwdenk Image Name: Simple Ramdisk Image 5470c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5471c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5472c609719bSwdenk Load Address: 00000000 5473c609719bSwdenk Entry Point: 00000000 5474c609719bSwdenk Verifying Checksum ... OK 5475c609719bSwdenk 5476c609719bSwdenk => bootm 40100000 40200000 5477c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5478c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5479c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5480c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5481c609719bSwdenk Load Address: 00000000 5482c609719bSwdenk Entry Point: 0000000c 5483c609719bSwdenk Verifying Checksum ... OK 5484c609719bSwdenk Uncompressing Kernel Image ... OK 5485c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5486c609719bSwdenk Image Name: Simple Ramdisk Image 5487c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5488c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5489c609719bSwdenk Load Address: 00000000 5490c609719bSwdenk Entry Point: 00000000 5491c609719bSwdenk Verifying Checksum ... OK 5492c609719bSwdenk Loading Ramdisk ... OK 5493c609719bSwdenk 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 5494c609719bSwdenk Boot arguments: root=/dev/ram 5495c609719bSwdenk time_init: decrementer frequency = 187500000/60 5496c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5497c609719bSwdenk ... 5498c609719bSwdenk RAMDISK: Compressed image found at block 0 5499c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5500c609719bSwdenk 5501c609719bSwdenk bash# 5502c609719bSwdenk 55030267768eSMatthew McClintockBoot Linux and pass a flat device tree: 55040267768eSMatthew McClintock----------- 55050267768eSMatthew McClintock 55060267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 55070267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 55080267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 55090267768eSMatthew McClintockflat device tree: 55100267768eSMatthew McClintock 55110267768eSMatthew McClintock=> print oftaddr 55120267768eSMatthew McClintockoftaddr=0x300000 55130267768eSMatthew McClintock=> print oft 55140267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 55150267768eSMatthew McClintock=> tftp $oftaddr $oft 55160267768eSMatthew McClintockSpeed: 1000, full duplex 55170267768eSMatthew McClintockUsing TSEC0 device 55180267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 55190267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 55200267768eSMatthew McClintockLoad address: 0x300000 55210267768eSMatthew McClintockLoading: # 55220267768eSMatthew McClintockdone 55230267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 55240267768eSMatthew McClintock=> tftp $loadaddr $bootfile 55250267768eSMatthew McClintockSpeed: 1000, full duplex 55260267768eSMatthew McClintockUsing TSEC0 device 55270267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 55280267768eSMatthew McClintockFilename 'uImage'. 55290267768eSMatthew McClintockLoad address: 0x200000 55300267768eSMatthew McClintockLoading:############ 55310267768eSMatthew McClintockdone 55320267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 55330267768eSMatthew McClintock=> print loadaddr 55340267768eSMatthew McClintockloadaddr=200000 55350267768eSMatthew McClintock=> print oftaddr 55360267768eSMatthew McClintockoftaddr=0x300000 55370267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 55380267768eSMatthew McClintock## Booting image at 00200000 ... 55390267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 55400267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 55410267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 55420267768eSMatthew McClintock Load Address: 00000000 55430267768eSMatthew McClintock Entry Point: 00000000 55440267768eSMatthew McClintock Verifying Checksum ... OK 55450267768eSMatthew McClintock Uncompressing Kernel Image ... OK 55460267768eSMatthew McClintockBooting using flat device tree at 0x300000 55470267768eSMatthew McClintockUsing MPC85xx ADS machine description 55480267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 55490267768eSMatthew McClintock[snip] 55500267768eSMatthew McClintock 55510267768eSMatthew McClintock 55526069ff26SwdenkMore About U-Boot Image Types: 55536069ff26Swdenk------------------------------ 55546069ff26Swdenk 55556069ff26SwdenkU-Boot supports the following image types: 55566069ff26Swdenk 55576069ff26Swdenk "Standalone Programs" are directly runnable in the environment 55586069ff26Swdenk provided by U-Boot; it is expected that (if they behave 55596069ff26Swdenk well) you can continue to work in U-Boot after return from 55606069ff26Swdenk the Standalone Program. 55616069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 55626069ff26Swdenk will take over control completely. Usually these programs 55636069ff26Swdenk will install their own set of exception handlers, device 55646069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 55656069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 55666069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 55676069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 55686069ff26Swdenk being started. 55696069ff26Swdenk "Multi-File Images" contain several images, typically an OS 55706069ff26Swdenk (Linux) kernel image and one or more data images like 55716069ff26Swdenk RAMDisks. This construct is useful for instance when you want 55726069ff26Swdenk to boot over the network using BOOTP etc., where the boot 55736069ff26Swdenk server provides just a single image file, but you want to get 55746069ff26Swdenk for instance an OS kernel and a RAMDisk image. 55756069ff26Swdenk 55766069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 55776069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 55786069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 55796069ff26Swdenk Immediately after the terminating 0 follow the images, one by 55806069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 55816069ff26Swdenk a multiple of 4 bytes). 55826069ff26Swdenk 55836069ff26Swdenk "Firmware Images" are binary images containing firmware (like 55846069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 55856069ff26Swdenk flash memory. 55866069ff26Swdenk 55876069ff26Swdenk "Script files" are command sequences that will be executed by 55886069ff26Swdenk U-Boot's command interpreter; this feature is especially 55896069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 55906069ff26Swdenk as command interpreter. 55916069ff26Swdenk 559244f074c7SMarek VasutBooting the Linux zImage: 559344f074c7SMarek Vasut------------------------- 559444f074c7SMarek Vasut 559544f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 559644f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 559744f074c7SMarek Vasutas the syntax of "bootm" command. 559844f074c7SMarek Vasut 55998ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5600017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5601017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5602017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5603017e1f3fSMarek Vasut 5604c609719bSwdenk 5605c609719bSwdenkStandalone HOWTO: 5606c609719bSwdenk================= 5607c609719bSwdenk 5608c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5609c609719bSwdenkrun "standalone" applications, which can use some resources of 5610c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5611c609719bSwdenk 5612c609719bSwdenkTwo simple examples are included with the sources: 5613c609719bSwdenk 5614c609719bSwdenk"Hello World" Demo: 5615c609719bSwdenk------------------- 5616c609719bSwdenk 5617c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5618c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5619c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5620c609719bSwdenklike that: 5621c609719bSwdenk 5622c609719bSwdenk => loads 5623c609719bSwdenk ## Ready for S-Record download ... 5624c609719bSwdenk ~>examples/hello_world.srec 5625c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5626c609719bSwdenk [file transfer complete] 5627c609719bSwdenk [connected] 5628c609719bSwdenk ## Start Addr = 0x00040004 5629c609719bSwdenk 5630c609719bSwdenk => go 40004 Hello World! This is a test. 5631c609719bSwdenk ## Starting application at 0x00040004 ... 5632c609719bSwdenk Hello World 5633c609719bSwdenk argc = 7 5634c609719bSwdenk argv[0] = "40004" 5635c609719bSwdenk argv[1] = "Hello" 5636c609719bSwdenk argv[2] = "World!" 5637c609719bSwdenk argv[3] = "This" 5638c609719bSwdenk argv[4] = "is" 5639c609719bSwdenk argv[5] = "a" 5640c609719bSwdenk argv[6] = "test." 5641c609719bSwdenk argv[7] = "<NULL>" 5642c609719bSwdenk Hit any key to exit ... 5643c609719bSwdenk 5644c609719bSwdenk ## Application terminated, rc = 0x0 5645c609719bSwdenk 5646c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5647c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5648c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5649c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5650c609719bSwdenkcharacter, but this is just a demo program. The application can be 5651c609719bSwdenkcontrolled by the following keys: 5652c609719bSwdenk 5653c609719bSwdenk ? - print current values og the CPM Timer registers 5654c609719bSwdenk b - enable interrupts and start timer 5655c609719bSwdenk e - stop timer and disable interrupts 5656c609719bSwdenk q - quit application 5657c609719bSwdenk 5658c609719bSwdenk => loads 5659c609719bSwdenk ## Ready for S-Record download ... 5660c609719bSwdenk ~>examples/timer.srec 5661c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5662c609719bSwdenk [file transfer complete] 5663c609719bSwdenk [connected] 5664c609719bSwdenk ## Start Addr = 0x00040004 5665c609719bSwdenk 5666c609719bSwdenk => go 40004 5667c609719bSwdenk ## Starting application at 0x00040004 ... 5668c609719bSwdenk TIMERS=0xfff00980 5669c609719bSwdenk Using timer 1 5670c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5671c609719bSwdenk 5672c609719bSwdenkHit 'b': 5673c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5674c609719bSwdenk Enabling timer 5675c609719bSwdenkHit '?': 5676c609719bSwdenk [q, b, e, ?] ........ 5677c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5678c609719bSwdenkHit '?': 5679c609719bSwdenk [q, b, e, ?] . 5680c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5681c609719bSwdenkHit '?': 5682c609719bSwdenk [q, b, e, ?] . 5683c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5684c609719bSwdenkHit '?': 5685c609719bSwdenk [q, b, e, ?] . 5686c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5687c609719bSwdenkHit 'e': 5688c609719bSwdenk [q, b, e, ?] ...Stopping timer 5689c609719bSwdenkHit 'q': 5690c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5691c609719bSwdenk 5692c609719bSwdenk 569385ec0bccSwdenkMinicom warning: 569485ec0bccSwdenk================ 569585ec0bccSwdenk 56967152b1d0SwdenkOver time, many people have reported problems when trying to use the 569785ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 569885ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5699f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 570085ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5701e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5702e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5703e53515a2SKarl O. Pincfor help with kermit. 5704e53515a2SKarl O. Pinc 570585ec0bccSwdenk 570652f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 570752f52c14Swdenkconfiguration to your "File transfer protocols" section: 570852f52c14Swdenk 570952f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 571052f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 571152f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 571252f52c14Swdenk 571352f52c14Swdenk 5714c609719bSwdenkNetBSD Notes: 5715c609719bSwdenk============= 5716c609719bSwdenk 5717c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5718c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5719c609719bSwdenk 5720c609719bSwdenkBuilding requires a cross environment; it is known to work on 5721c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5722c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5723c609719bSwdenkNote that the cross-powerpc package does not install include files; 5724c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5725c609719bSwdenkmissing. This file has to be installed and patched manually: 5726c609719bSwdenk 5727c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5728c609719bSwdenk # mkdir powerpc 5729c609719bSwdenk # ln -s powerpc machine 5730c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5731c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5732c609719bSwdenk 5733c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5734c609719bSwdenkand U-Boot include files. 5735c609719bSwdenk 5736c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5737c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5738c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5739c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 57402a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5741c609719bSwdenk 5742c609719bSwdenk 5743c609719bSwdenkImplementation Internals: 5744c609719bSwdenk========================= 5745c609719bSwdenk 5746c609719bSwdenkThe following is not intended to be a complete description of every 5747c609719bSwdenkimplementation detail. However, it should help to understand the 5748c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5749c609719bSwdenkhardware. 5750c609719bSwdenk 5751c609719bSwdenk 5752c609719bSwdenkInitial Stack, Global Data: 5753c609719bSwdenk--------------------------- 5754c609719bSwdenk 5755c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5756c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5757c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5758c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5759c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5760c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5761c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5762c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5763c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5764c609719bSwdenklocked as (mis-) used as memory, etc. 5765c609719bSwdenk 57667152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 57670668236bSWolfgang Denk U-Boot mailing list: 576843d9616cSwdenk 576943d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 577043d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 577143d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 577243d9616cSwdenk ... 577343d9616cSwdenk 577443d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 577543d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 577643d9616cSwdenk require any physical RAM backing up the cache. The cleverness 577743d9616cSwdenk is that the cache is being used as a temporary supply of 577843d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 577911ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 578043d9616cSwdenk can see how this works by studying the cache architecture and 578143d9616cSwdenk operation in the architecture and processor-specific manuals. 578243d9616cSwdenk 578343d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 578443d9616cSwdenk is another option for the system designer to use as an 578511ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 578643d9616cSwdenk option should work for you. Using CS 4 should be fine if your 578743d9616cSwdenk board designers haven't used it for something that would 578843d9616cSwdenk cause you grief during the initial boot! It is frequently not 578943d9616cSwdenk used. 579043d9616cSwdenk 57916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 579243d9616cSwdenk with your processor/board/system design. The default value 579343d9616cSwdenk you will find in any recent u-boot distribution in 57948a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 579543d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 579643d9616cSwdenk it above 400_0000. Just make sure your board has no resources 579743d9616cSwdenk that are supposed to respond to that address! That code in 579843d9616cSwdenk start.S has been around a while and should work as is when 579943d9616cSwdenk you get the config right. 580043d9616cSwdenk 580143d9616cSwdenk -Chris Hallinan 580243d9616cSwdenk DS4.COM, Inc. 580343d9616cSwdenk 5804c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5805c609719bSwdenkcode for the initialization procedures: 5806c609719bSwdenk 5807c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5808c609719bSwdenk to write it. 5809c609719bSwdenk 581011ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5811c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 58127152b1d0Swdenk zation is performed later (when relocating to RAM). 5813c609719bSwdenk 5814c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5815c609719bSwdenk that. 5816c609719bSwdenk 5817c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5818c609719bSwdenknormal global data to share information beween the code. But it 5819c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5820c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5821c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5822c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5823c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5824c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5825c609719bSwdenkreserve for this purpose. 5826c609719bSwdenk 58277152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5828c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5829c609719bSwdenkGCC's implementation. 5830c609719bSwdenk 5831c609719bSwdenkFor PowerPC, the following registers have specific use: 5832c609719bSwdenk R1: stack pointer 5833e7670f6cSWolfgang Denk R2: reserved for system use 5834c609719bSwdenk R3-R4: parameter passing and return values 5835c609719bSwdenk R5-R10: parameter passing 5836c609719bSwdenk R13: small data area pointer 5837c609719bSwdenk R30: GOT pointer 5838c609719bSwdenk R31: frame pointer 5839c609719bSwdenk 5840e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5841e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5842e6bee808SJoakim Tjernlund going back and forth between asm and C) 5843c609719bSwdenk 5844e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5845c609719bSwdenk 5846c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5847c609719bSwdenk address of the global data structure is known at compile time), 5848c609719bSwdenk but it turned out that reserving a register results in somewhat 5849c609719bSwdenk smaller code - although the code savings are not that big (on 5850c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5851c609719bSwdenk 624 text + 127 data). 5852c609719bSwdenk 5853c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 58544c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 58554c58eb55SMike Frysinger 5856c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 58574c58eb55SMike Frysinger 5858c609719bSwdenkOn ARM, the following registers are used: 5859c609719bSwdenk 5860c609719bSwdenk R0: function argument word/integer result 5861c609719bSwdenk R1-R3: function argument word 586212eba1b4SJeroen Hofstee R9: platform specific 586312eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 5864c609719bSwdenk R11: argument (frame) pointer 5865c609719bSwdenk R12: temporary workspace 5866c609719bSwdenk R13: stack pointer 5867c609719bSwdenk R14: link register 5868c609719bSwdenk R15: program counter 5869c609719bSwdenk 587012eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 587112eba1b4SJeroen Hofstee 587212eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 5873c609719bSwdenk 58740df01fd3SThomas ChouOn Nios II, the ABI is documented here: 58750df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 58760df01fd3SThomas Chou 58770df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 58780df01fd3SThomas Chou 58790df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 58800df01fd3SThomas Chou to access small data sections, so gp is free. 58810df01fd3SThomas Chou 5882afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5883afc1ce82SMacpaul Lin 5884afc1ce82SMacpaul Lin R0-R1: argument/return 5885afc1ce82SMacpaul Lin R2-R5: argument 5886afc1ce82SMacpaul Lin R15: temporary register for assembler 5887afc1ce82SMacpaul Lin R16: trampoline register 5888afc1ce82SMacpaul Lin R28: frame pointer (FP) 5889afc1ce82SMacpaul Lin R29: global pointer (GP) 5890afc1ce82SMacpaul Lin R30: link register (LP) 5891afc1ce82SMacpaul Lin R31: stack pointer (SP) 5892afc1ce82SMacpaul Lin PC: program counter (PC) 5893afc1ce82SMacpaul Lin 5894afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5895afc1ce82SMacpaul Lin 5896d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5897d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5898c609719bSwdenk 5899c609719bSwdenkMemory Management: 5900c609719bSwdenk------------------ 5901c609719bSwdenk 5902c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5903c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5904c609719bSwdenk 5905c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5906c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5907c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5908c609719bSwdenkphysical memory banks. 5909c609719bSwdenk 5910c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5911c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5912c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5913c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 59146d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5915c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5916c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5917c609719bSwdenk 5918c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5919c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5920c609719bSwdenk 5921c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5922c609719bSwdenkthis: 5923c609719bSwdenk 5924c609719bSwdenk 0x0000 0000 Exception Vector code 5925c609719bSwdenk : 5926c609719bSwdenk 0x0000 1FFF 5927c609719bSwdenk 0x0000 2000 Free for Application Use 5928c609719bSwdenk : 5929c609719bSwdenk : 5930c609719bSwdenk 5931c609719bSwdenk : 5932c609719bSwdenk : 5933c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5934c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5935c609719bSwdenk 0x00FC 0000 Malloc Arena 5936c609719bSwdenk : 5937c609719bSwdenk 0x00FD FFFF 5938c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5939c609719bSwdenk ... eventually: LCD or video framebuffer 5940c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5941c609719bSwdenk 0x00FF FFFF [End of RAM] 5942c609719bSwdenk 5943c609719bSwdenk 5944c609719bSwdenkSystem Initialization: 5945c609719bSwdenk---------------------- 5946c609719bSwdenk 5947c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 594811ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5949c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 59507152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5951c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5952c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5953c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5954c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5955c609719bSwdenkthe caches and the SIU. 5956c609719bSwdenk 5957c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5958c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5959c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5960c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5961c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5962c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5963c609719bSwdenkbanks. 5964c609719bSwdenk 5965c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 59667152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5967c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5968c609719bSwdenk0x00000000, with any additional banks following immediately to create 5969c609719bSwdenkcontiguous memory starting from 0. 5970c609719bSwdenk 5971c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5972c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5973c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5974c609719bSwdenkpages, and the final stack is set up. 5975c609719bSwdenk 5976c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5977c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5978c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5979c609719bSwdenknew address in RAM. 5980c609719bSwdenk 5981c609719bSwdenk 5982c609719bSwdenkU-Boot Porting Guide: 5983c609719bSwdenk---------------------- 5984c609719bSwdenk 5985c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 59866aff3115Swdenklist, October 2002] 5987c609719bSwdenk 5988c609719bSwdenk 5989c609719bSwdenkint main(int argc, char *argv[]) 5990c609719bSwdenk{ 5991c609719bSwdenk sighandler_t no_more_time; 5992c609719bSwdenk 5993c609719bSwdenk signal(SIGALRM, no_more_time); 5994c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5995c609719bSwdenk 5996c609719bSwdenk if (available_money > available_manpower) { 59976c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5998c609719bSwdenk return 0; 5999c609719bSwdenk } 6000c609719bSwdenk 6001c609719bSwdenk Download latest U-Boot source; 6002c609719bSwdenk 60030668236bSWolfgang Denk Subscribe to u-boot mailing list; 60046aff3115Swdenk 60056c3fef28SJerry Van Baren if (clueless) 6006c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6007c609719bSwdenk 6008c609719bSwdenk while (learning) { 6009c609719bSwdenk Read the README file in the top level directory; 60107cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 60116c3fef28SJerry Van Baren Read applicable doc/*.README; 6012c609719bSwdenk Read the source, Luke; 60136c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6014c609719bSwdenk } 6015c609719bSwdenk 60166c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 60176c3fef28SJerry Van Baren Buy a BDI3000; 60186c3fef28SJerry Van Baren else 6019c609719bSwdenk Add a lot of aggravation and time; 6020c609719bSwdenk 60216c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 60226c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 60236c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 60246c3fef28SJerry Van Baren } else { 6025c609719bSwdenk Create your own board support subdirectory; 60266c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 60276c3fef28SJerry Van Baren } 60286c3fef28SJerry Van Baren Edit new board/<myboard> files 60296c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6030c609719bSwdenk 60316c3fef28SJerry Van Baren while (!accepted) { 6032c609719bSwdenk while (!running) { 6033c609719bSwdenk do { 6034c609719bSwdenk Add / modify source code; 6035c609719bSwdenk } until (compiles); 6036c609719bSwdenk Debug; 6037c609719bSwdenk if (clueless) 6038c609719bSwdenk email("Hi, I am having problems..."); 6039c609719bSwdenk } 60406c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 60416c3fef28SJerry Van Baren if (reasonable critiques) 60426c3fef28SJerry Van Baren Incorporate improvements from email list code review; 60436c3fef28SJerry Van Baren else 60446c3fef28SJerry Van Baren Defend code as written; 60456c3fef28SJerry Van Baren } 6046c609719bSwdenk 6047c609719bSwdenk return 0; 6048c609719bSwdenk} 6049c609719bSwdenk 6050c609719bSwdenkvoid no_more_time (int sig) 6051c609719bSwdenk{ 6052c609719bSwdenk hire_a_guru(); 6053c609719bSwdenk} 6054c609719bSwdenk 6055c609719bSwdenk 6056c609719bSwdenkCoding Standards: 6057c609719bSwdenk----------------- 6058c609719bSwdenk 6059c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 60602c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 60617ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6062c609719bSwdenk 60632c051651SDetlev ZundelSource files originating from a different project (for example the 60642c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 60652c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 60662c051651SDetlev Zundelsources. 60672c051651SDetlev Zundel 60682c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 60692c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 60702c051651SDetlev Zundelin your code. 6071c609719bSwdenk 6072c178d3daSwdenkPlease also stick to the following formatting rules: 6073180d3f74Swdenk- remove any trailing white space 60747ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6075180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 60767ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6077180d3f74Swdenk- do not add trailing empty lines to source files 6078180d3f74Swdenk 6079c609719bSwdenkSubmissions which do not conform to the standards may be returned 6080c609719bSwdenkwith a request to reformat the changes. 6081c609719bSwdenk 6082c609719bSwdenk 6083c609719bSwdenkSubmitting Patches: 6084c609719bSwdenk------------------- 6085c609719bSwdenk 6086c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6087c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6088c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6089c609719bSwdenk 60900d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6091218ca724SWolfgang Denk 60920668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 60930668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 60940668236bSWolfgang Denk 6095c609719bSwdenkWhen you send a patch, please include the following information with 6096c609719bSwdenkit: 6097c609719bSwdenk 6098c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6099c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6100c609719bSwdenk patch actually fixes something. 6101c609719bSwdenk 6102c609719bSwdenk* For new features: a description of the feature and your 6103c609719bSwdenk implementation. 6104c609719bSwdenk 6105c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6106c609719bSwdenk 6107c609719bSwdenk* For major contributions, your entry to the CREDITS file 6108c609719bSwdenk 610927af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 611027af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6111c609719bSwdenk 6112c609719bSwdenk* If your patch adds new configuration options, don't forget to 6113c609719bSwdenk document these in the README file. 6114c609719bSwdenk 6115218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6116218ca724SWolfgang Denk recommended) you can easily generate the patch using the 61177ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6118218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6119218ca724SWolfgang Denk with some other mail clients. 6120c609719bSwdenk 6121218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6122218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6123218ca724SWolfgang Denk GNU diff. 61246dff5529Swdenk 6125218ca724SWolfgang Denk The current directory when running this command shall be the parent 6126218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6127218ca724SWolfgang Denk your patch includes sufficient directory information for the 6128218ca724SWolfgang Denk affected files). 6129218ca724SWolfgang Denk 6130218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6131218ca724SWolfgang Denk and compressed attachments must not be used. 6132c609719bSwdenk 613352f52c14Swdenk* If one logical set of modifications affects or creates several 613452f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 613552f52c14Swdenk 613652f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 613752f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 613852f52c14Swdenk 613952f52c14Swdenk 6140c609719bSwdenkNotes: 6141c609719bSwdenk 6142c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6143c609719bSwdenk source tree and make sure that no errors or warnings are reported 6144c609719bSwdenk for any of the boards. 6145c609719bSwdenk 6146c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6147c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6148c609719bSwdenk returned with a request to re-formatting / split it. 6149c609719bSwdenk 6150c609719bSwdenk* If you modify existing code, make sure that your new code does not 6151c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6152c609719bSwdenk When adding new features, these should compile conditionally only 6153c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6154c609719bSwdenk disabled must not need more memory than the old code without your 6155c609719bSwdenk modification. 615690dc6704Swdenk 61570668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 61580668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 61590668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 61600668236bSWolfgang Denk bigger than the size limit should be avoided. 6161