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 4306cb461b4SDaniel Schwierzeck- Generic CPU options: 4316cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4326cb461b4SDaniel Schwierzeck 4336cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4346cb461b4SDaniel Schwierzeck values is arch specific. 4356cb461b4SDaniel Schwierzeck 4365614e71bSYork Sun CONFIG_SYS_FSL_DDR 4375614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4385614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4395614e71bSYork Sun SoCs. 4405614e71bSYork Sun 4415614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4425614e71bSYork Sun Freescale DDR memory-mapped register base. 4435614e71bSYork Sun 4445614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4455614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4465614e71bSYork Sun deskew training are not available. 4475614e71bSYork Sun 4485614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4495614e71bSYork Sun Freescale DDR1 controller. 4505614e71bSYork Sun 4515614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4525614e71bSYork Sun Freescale DDR2 controller. 4535614e71bSYork Sun 4545614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4555614e71bSYork Sun Freescale DDR3 controller. 4565614e71bSYork Sun 4579ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4589ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4599ac4ffbdSYork Sun 4605614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4615614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4625614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4635614e71bSYork Sun implemetation. 4645614e71bSYork Sun 4655614e71bSYork Sun CONFIG_SYS_FSL_DDR2 4665614e71bSYork Sun Board config to use DDR2. It can be eanbeld for SoCs with 4675614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 4685614e71bSYork Sun implementation. 4695614e71bSYork Sun 4705614e71bSYork Sun CONFIG_SYS_FSL_DDR3 4715614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 4725614e71bSYork Sun Freescale DDR3 controllers. 4735614e71bSYork Sun 4741b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 4751b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 4761b4175d6SPrabhakar Kushwaha 4771b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 4781b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 4791b4175d6SPrabhakar Kushwaha 480690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 481690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 482690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 483690e4258SPrabhakar Kushwaha 484690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 485690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 486690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 487690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 488690e4258SPrabhakar Kushwaha 4894e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 4904e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 4914e5b1bd0SYork Sun 4924e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 4934e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 4944e5b1bd0SYork Sun 4956b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 4966b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 4976b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 4986b9e309aSYork Sun it could be different for ARM SoCs. 4996b9e309aSYork Sun 5006b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5016b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5026b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5036b1e1254SYork Sun SoCs with ARM core. 5046b1e1254SYork Sun 5050b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5070b953ffcSMarkus Klotzbuecher 5080b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5090b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5100b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5110b953ffcSMarkus Klotzbuecher 5126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5130b953ffcSMarkus Klotzbuecher 5140b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5150b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5160b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5170b953ffcSMarkus Klotzbuecher by this value. 5180b953ffcSMarkus Klotzbuecher 51992bbd64eSDaniel Schwierzeck- MIPS CPU options: 52092bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 52192bbd64eSDaniel Schwierzeck 52292bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 52392bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 52492bbd64eSDaniel Schwierzeck relocation. 52592bbd64eSDaniel Schwierzeck 52692bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 52792bbd64eSDaniel Schwierzeck 52892bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 52992bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 53092bbd64eSDaniel Schwierzeck Possible values are: 53192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 53292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 53392bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 53492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 53592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 53692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 53792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 53892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 53992bbd64eSDaniel Schwierzeck 54092bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 54192bbd64eSDaniel Schwierzeck 54292bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 54392bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 54492bbd64eSDaniel Schwierzeck 54592bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 54692bbd64eSDaniel Schwierzeck 54792bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 54892bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 54992bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 55092bbd64eSDaniel Schwierzeck 551b67d8816SChristian Riesch- ARM options: 552b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 553b67d8816SChristian Riesch 554b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 555b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 556b67d8816SChristian Riesch 5575356f545SAneesh V CONFIG_SYS_THUMB_BUILD 5585356f545SAneesh V 5595356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 5605356f545SAneesh V set for ARM architectures. Thumb instruction set provides 5615356f545SAneesh V better code density. For ARM architectures that support 5625356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 5635356f545SAneesh V GCC. 5645356f545SAneesh V 565c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 5660678587fSStephen Warren CONFIG_ARM_ERRATA_742230 5670678587fSStephen Warren CONFIG_ARM_ERRATA_743622 5680678587fSStephen Warren CONFIG_ARM_ERRATA_751472 5690678587fSStephen Warren 5700678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 5710678587fSStephen Warren during U-Boot startup. Note that these options force the 5720678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 5730678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 5740678587fSStephen Warren set these options unless they apply! 5750678587fSStephen Warren 576795659dcSStephen Warren- CPU timer options: 577795659dcSStephen Warren CONFIG_SYS_HZ 578795659dcSStephen Warren 579795659dcSStephen Warren The frequency of the timer returned by get_timer(). 580795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 581795659dcSStephen Warren option must be set to 1000. 582795659dcSStephen Warren 5835da627a4Swdenk- Linux Kernel Interface: 584c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 585c609719bSwdenk 586c609719bSwdenk U-Boot stores all clock information in Hz 587c609719bSwdenk internally. For binary compatibility with older Linux 588c609719bSwdenk kernels (which expect the clocks passed in the 589c609719bSwdenk bd_info data to be in MHz) the environment variable 590c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 591c609719bSwdenk converts clock data to MHZ before passing it to the 592c609719bSwdenk Linux kernel. 593c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 594c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 595c609719bSwdenk default environment. 596c609719bSwdenk 5975da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 5985da627a4Swdenk 59911ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6005da627a4Swdenk expect it to be in bytes, others in MB. 6015da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6025da627a4Swdenk 603fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 604f57f70aaSWolfgang Denk 605f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 606213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 607213bf8c8SGerald Van Baren concepts). 608213bf8c8SGerald Van Baren 609213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 610213bf8c8SGerald Van Baren * New libfdt-based support 611213bf8c8SGerald Van Baren * Adds the "fdt" command 6123bb342fcSKim Phillips * The bootm command automatically updates the fdt 613213bf8c8SGerald Van Baren 614b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 615b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 616b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 617b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 618f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 619c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 620f57f70aaSWolfgang Denk 62111ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 62211ccc33fSMarcel Ziswiler addresses 6233bb342fcSKim Phillips 6244e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6254e253137SKumar Gala 6264e253137SKumar Gala Board code has addition modification that it wants to make 6274e253137SKumar Gala to the flat device tree before handing it off to the kernel 6286705d81eSwdenk 6290267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6300267768eSMatthew McClintock 63111ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6320267768eSMatthew McClintock param header, the default value is zero if undefined. 6330267768eSMatthew McClintock 6343887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6353887c3fbSHeiko Schocher 6363887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6373887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6383887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6393887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6403887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6413887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6423887c3fbSHeiko Schocher 6437eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6447eb29398SIgor Grinberg 6457eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6467eb29398SIgor Grinberg machine type and must be used to specify the machine type 6477eb29398SIgor Grinberg number as it appears in the ARM machine registry 6487eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6497eb29398SIgor Grinberg Only boards that have multiple machine types supported 6507eb29398SIgor Grinberg in a single configuration file and the machine type is 6517eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6527eb29398SIgor Grinberg 6530b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6540b2f4ecaSNiklaus Giger 6550b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6560b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 6570b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6580b2f4ecaSNiklaus Giger 6590b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 6600b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 6610b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 6620b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 6630b2f4ecaSNiklaus Giger 6640b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 6650b2f4ecaSNiklaus Giger 6660b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 6670b2f4ecaSNiklaus Giger 6680b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 6690b2f4ecaSNiklaus Giger the defaults discussed just above. 6700b2f4ecaSNiklaus Giger 6712c451f78SAneesh V- Cache Configuration: 6722c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 6732c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 6742c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 6752c451f78SAneesh V 67693bc2193SAneesh V- Cache Configuration for ARM: 67793bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 67893bc2193SAneesh V controller 67993bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 68093bc2193SAneesh V controller register space 68193bc2193SAneesh V 6826705d81eSwdenk- Serial Ports: 68348d0192fSAndreas Engel CONFIG_PL010_SERIAL 6846705d81eSwdenk 6856705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 6866705d81eSwdenk 68748d0192fSAndreas Engel CONFIG_PL011_SERIAL 6886705d81eSwdenk 6896705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 6906705d81eSwdenk 6916705d81eSwdenk CONFIG_PL011_CLOCK 6926705d81eSwdenk 6936705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 6946705d81eSwdenk the clock speed of the UARTs. 6956705d81eSwdenk 6966705d81eSwdenk CONFIG_PL01x_PORTS 6976705d81eSwdenk 6986705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 6996705d81eSwdenk define this to a list of base addresses for each (supported) 7006705d81eSwdenk port. See e.g. include/configs/versatile.h 7016705d81eSwdenk 702910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 703910f1ae3SJohn Rigby 704910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 705910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 706910f1ae3SJohn Rigby this variable to initialize the extra register. 707910f1ae3SJohn Rigby 708910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 709910f1ae3SJohn Rigby 710910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 711910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 712910f1ae3SJohn Rigby variable to flush the UART at init time. 713910f1ae3SJohn Rigby 7146705d81eSwdenk 715c609719bSwdenk- Console Interface: 716c609719bSwdenk Depending on board, define exactly one serial port 717c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 718c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 719c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 720c609719bSwdenk 721c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 722c609719bSwdenk port routines must be defined elsewhere 723c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 724c609719bSwdenk 725c609719bSwdenk CONFIG_CFB_CONSOLE 726c609719bSwdenk Enables console device for a color framebuffer. Needs following 727c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 728c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 729c609719bSwdenk (default big endian) 730c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 731c609719bSwdenk rectangle fill 732c609719bSwdenk (cf. smiLynxEM) 733c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 734c609719bSwdenk bit-blit (cf. smiLynxEM) 735c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 736c609719bSwdenk (cols=pitch) 737c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 738c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 739c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 740c609719bSwdenk (0-5, cf. cfb_console.c) 741c609719bSwdenk VIDEO_FB_ADRS framebuffer address 742c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 743c609719bSwdenk (i.e. i8042_kbd_init()) 744c609719bSwdenk VIDEO_TSTC_FCT test char fct 745c609719bSwdenk (i.e. i8042_tstc) 746c609719bSwdenk VIDEO_GETC_FCT get char fct 747c609719bSwdenk (i.e. i8042_getc) 748c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 749c609719bSwdenk (requires blink timer 750c609719bSwdenk cf. i8042.c) 7516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 752c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 753c609719bSwdenk upper right corner 754602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 755c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 756c609719bSwdenk upper left corner 757a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 758a6c7ad2fSwdenk linux_logo.h for logo. 759a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 760c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 76111ccc33fSMarcel Ziswiler additional board info beside 762c609719bSwdenk the logo 763c609719bSwdenk 76433a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 76533a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 76633a35bbbSPali Rohár erase functions and limited graphics rendition control). 76733a35bbbSPali Rohár 768c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 769c609719bSwdenk default i/o. Serial console can be forced with 770c609719bSwdenk environment 'console=serial'. 771c609719bSwdenk 772a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 773a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 774a3ad8e26Swdenk the "silent" environment variable. See 775a3ad8e26Swdenk doc/README.silent for more information. 776a3ad8e26Swdenk 77745ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 77845ae2546SHeiko Schocher is 0x00. 77945ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 78045ae2546SHeiko Schocher is 0xa0. 78145ae2546SHeiko Schocher 782c609719bSwdenk- Console Baudrate: 783c609719bSwdenk CONFIG_BAUDRATE - in bps 784c609719bSwdenk Select one of the baudrates listed in 7856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 7866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 787c609719bSwdenk 788c92fac91SHeiko Schocher- Console Rx buffer length 789c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 790c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 7912b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 792c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 793c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 794c92fac91SHeiko Schocher the SMC. 795c92fac91SHeiko Schocher 7969558b48aSGraeme Russ- Pre-Console Buffer: 7979558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 7989558b48aSGraeme Russ initialised etc) all console output is silently discarded. 7999558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8009558b48aSGraeme Russ buffer any console messages prior to the console being 8019558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8029558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8039558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8049558b48aSGraeme Russ bytes are output before the console is initialised, the 8059558b48aSGraeme Russ earlier bytes are discarded. 8069558b48aSGraeme Russ 8079558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8089558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8099558b48aSGraeme Russ 810046a37bdSSonny Rao- Safe printf() functions 811046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 812046a37bdSSonny Rao the printf() functions. These are defined in 813046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 814046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 815046a37bdSSonny Rao If this option is not given then these functions will 816046a37bdSSonny Rao silently discard their buffer size argument - this means 817046a37bdSSonny Rao you are not getting any overflow checking in this case. 818046a37bdSSonny Rao 819c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 820c609719bSwdenk Delay before automatically booting the default image; 821c609719bSwdenk set to -1 to disable autoboot. 82293d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 82393d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 824c609719bSwdenk 825c609719bSwdenk See doc/README.autoboot for these options that 826c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 827c609719bSwdenk CONFIG_BOOT_RETRY_TIME 828c609719bSwdenk CONFIG_BOOT_RETRY_MIN 829c609719bSwdenk CONFIG_AUTOBOOT_KEYED 830c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 831c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 832c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 833c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 834c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 835c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 836c609719bSwdenk CONFIG_RESET_TO_RETRY 837c609719bSwdenk 838c609719bSwdenk- Autoboot Command: 839c609719bSwdenk CONFIG_BOOTCOMMAND 840c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 841c609719bSwdenk define a command string that is automatically executed 842c609719bSwdenk when no character is read on the console interface 843c609719bSwdenk within "Boot Delay" after reset. 844c609719bSwdenk 845c609719bSwdenk CONFIG_BOOTARGS 846c609719bSwdenk This can be used to pass arguments to the bootm 847c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 848c609719bSwdenk environment value "bootargs". 849c609719bSwdenk 850c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 851c609719bSwdenk The value of these goes into the environment as 852c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 853c609719bSwdenk as a convenience, when switching between booting from 85411ccc33fSMarcel Ziswiler RAM and NFS. 855c609719bSwdenk 856eda0ba38SHeiko Schocher- Bootcount: 857eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 858eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 859eda0ba38SHeiko Schocher cycle, see: 860eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 861eda0ba38SHeiko Schocher 862eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 863eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 864eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 865eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 866eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 867eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 868eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 869eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 870eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 871eda0ba38SHeiko Schocher 872c609719bSwdenk- Pre-Boot Commands: 873c609719bSwdenk CONFIG_PREBOOT 874c609719bSwdenk 875c609719bSwdenk When this option is #defined, the existence of the 876c609719bSwdenk environment variable "preboot" will be checked 877c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 878c609719bSwdenk countdown and/or running the auto-boot command resp. 879c609719bSwdenk entering interactive mode. 880c609719bSwdenk 881c609719bSwdenk This feature is especially useful when "preboot" is 882c609719bSwdenk automatically generated or modified. For an example 883c609719bSwdenk see the LWMON board specific code: here "preboot" is 884c609719bSwdenk modified when the user holds down a certain 885c609719bSwdenk combination of keys on the (special) keyboard when 886c609719bSwdenk booting the systems 887c609719bSwdenk 888c609719bSwdenk- Serial Download Echo Mode: 889c609719bSwdenk CONFIG_LOADS_ECHO 890c609719bSwdenk If defined to 1, all characters received during a 891c609719bSwdenk serial download (using the "loads" command) are 892c609719bSwdenk echoed back. This might be needed by some terminal 893c609719bSwdenk emulations (like "cu"), but may as well just take 894c609719bSwdenk time on others. This setting #define's the initial 895c609719bSwdenk value of the "loads_echo" environment variable. 896c609719bSwdenk 897602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 898c609719bSwdenk CONFIG_KGDB_BAUDRATE 899c609719bSwdenk Select one of the baudrates listed in 9006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 901c609719bSwdenk 902c609719bSwdenk- Monitor Functions: 903602ad3b3SJon Loeliger Monitor commands can be included or excluded 904602ad3b3SJon Loeliger from the build by using the #include files 905c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 906c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 907602ad3b3SJon Loeliger and augmenting with additional #define's 908602ad3b3SJon Loeliger for wanted commands. 909c609719bSwdenk 910602ad3b3SJon Loeliger The default command configuration includes all commands 911602ad3b3SJon Loeliger except those marked below with a "*". 912602ad3b3SJon Loeliger 913602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 914602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 915602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 916602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 917602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 918602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 919602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 92008d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 921602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 922710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 923602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 924602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 925602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 926a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 927a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 928a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 929a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 930602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 931602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 932246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 933602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 934602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9355e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 936fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 93788733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9380c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 93903e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 94003e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 94116f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 94216f4d933SStephen Warren that work for multiple fs types 943bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 944602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 94503e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 946602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 947602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9484d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 94953fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 950a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 951a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 952bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 953602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 954602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 955602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 956602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 9578fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 9584d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 959602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 9600c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 961c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 962602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 963602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 964602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 965602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 9664d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 967d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 968d22c338eSJoe Hershberger (169.254.*.*) 969602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 970602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 9714d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 97202c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 97315a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 974602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 975a2681707SWolfgang Denk loop, loopw 9764d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 977602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 978602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 979602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 98068d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 981602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 982602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 9834d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 984e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 985e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 986602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 987602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 988602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 989602ad3b3SJon Loeliger host 990602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 991ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 992602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 993602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 994d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 995602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 996602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 997602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 998602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 999602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1000602ad3b3SJon Loeliger (4xx only) 1001f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10024d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 100302c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10047d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 100574de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1006602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10077a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10081fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1009da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1010da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1011602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1012602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1013c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10144d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 1015*89c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1016c609719bSwdenk 1017c609719bSwdenk EXAMPLE: If you want all functions except of network 1018c609719bSwdenk support you can write: 1019c609719bSwdenk 1020602ad3b3SJon Loeliger #include "config_cmd_all.h" 1021602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1022c609719bSwdenk 1023213bf8c8SGerald Van Baren Other Commands: 1024213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1025c609719bSwdenk 1026c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1027602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1028c609719bSwdenk what you (and your U-Boot users) are doing. Data 1029c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1030c609719bSwdenk 8260 (where accesses to the IMMR region must be 1031c609719bSwdenk uncached), and it cannot be disabled on all other 1032c609719bSwdenk systems where we (mis-) use the data cache to hold an 1033c609719bSwdenk initial stack and some data. 1034c609719bSwdenk 1035c609719bSwdenk 1036c609719bSwdenk XXX - this list needs to get updated! 1037c609719bSwdenk 1038a5ecbe62SWolfgang Denk- Regular expression support: 1039a5ecbe62SWolfgang Denk CONFIG_REGEX 1040a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1041a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1042a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1043a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1044a5ecbe62SWolfgang Denk 104545ba8077SSimon Glass- Device tree: 104645ba8077SSimon Glass CONFIG_OF_CONTROL 104745ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 104845ba8077SSimon Glass to configure its devices, instead of relying on statically 104945ba8077SSimon Glass compiled #defines in the board file. This option is 105045ba8077SSimon Glass experimental and only available on a few boards. The device 105145ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 105245ba8077SSimon Glass 10532c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10542c0f79e4SSimon Glass be done using one of the two options below: 1055bbb0b128SSimon Glass 1056bbb0b128SSimon Glass CONFIG_OF_EMBED 1057bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1058bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1059bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1060bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1061bbb0b128SSimon Glass the global data structure as gd->blob. 106245ba8077SSimon Glass 10632c0f79e4SSimon Glass CONFIG_OF_SEPARATE 10642c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 10652c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 10662c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 10672c0f79e4SSimon Glass 10682c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 10692c0f79e4SSimon Glass 10702c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 10712c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 10722c0f79e4SSimon Glass still use the individual files if you need something more 10732c0f79e4SSimon Glass exotic. 10742c0f79e4SSimon Glass 1075c609719bSwdenk- Watchdog: 1076c609719bSwdenk CONFIG_WATCHDOG 1077c609719bSwdenk If this variable is defined, it enables watchdog 10786abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 10796abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 10806abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 10816abe6fb6SDetlev Zundel register. When supported for a specific SoC is 10826abe6fb6SDetlev Zundel available, then no further board specific code should 10836abe6fb6SDetlev Zundel be needed to use it. 10846abe6fb6SDetlev Zundel 10856abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 10866abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 10876abe6fb6SDetlev Zundel SoC, then define this variable and provide board 10886abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1089c609719bSwdenk 1090c1551ea8Sstroese- U-Boot Version: 1091c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1092c1551ea8Sstroese If this variable is defined, an environment variable 1093c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1094c1551ea8Sstroese version as printed by the "version" command. 1095a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1096a1ea8e51SBenoît Thébaudeau next reset. 1097c1551ea8Sstroese 1098c609719bSwdenk- Real-Time Clock: 1099c609719bSwdenk 1100602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1101c609719bSwdenk has to be selected, too. Define exactly one of the 1102c609719bSwdenk following options: 1103c609719bSwdenk 1104c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1105c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11064e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1107c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11081cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1109c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11107f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 11113bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11129536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11134c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 111571d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 111671d19f30SHeiko Schocher RV3029 RTC. 1117c609719bSwdenk 1118b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1119b37c7e5eSwdenk must also be configured. See I2C Support, below. 1120b37c7e5eSwdenk 1121e92739d3SPeter Tyser- GPIO Support: 1122e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1123e92739d3SPeter Tyser 11245dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11255dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11265dec49caSChris Packham pins supported by a particular chip. 11275dec49caSChris Packham 1128e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1129e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1130e92739d3SPeter Tyser 1131c609719bSwdenk- Timestamp Support: 1132c609719bSwdenk 1133c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1134c609719bSwdenk (date and time) of an image is printed by image 1135c609719bSwdenk commands like bootm or iminfo. This option is 1136602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1137c609719bSwdenk 1138923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1139923c46f9SKarl O. Pinc Zero or more of the following: 1140923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1141923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1142923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1143923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1144923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1145923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1146923c46f9SKarl O. Pinc disk/part_efi.c 1147923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1148c609719bSwdenk 1149602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1150218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1151923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1152c609719bSwdenk 1153c609719bSwdenk- IDE Reset method: 11544d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 11554d13cbadSwdenk board configurations files but used nowhere! 1156c609719bSwdenk 11574d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 11584d13cbadSwdenk be performed by calling the function 11594d13cbadSwdenk ide_set_reset(int reset) 11604d13cbadSwdenk which has to be defined in a board specific file 1161c609719bSwdenk 1162c609719bSwdenk- ATAPI Support: 1163c609719bSwdenk CONFIG_ATAPI 1164c609719bSwdenk 1165c609719bSwdenk Set this to enable ATAPI support. 1166c609719bSwdenk 1167c40b2956Swdenk- LBA48 Support 1168c40b2956Swdenk CONFIG_LBA48 1169c40b2956Swdenk 1170c40b2956Swdenk Set this to enable support for disks larger than 137GB 11714b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1172c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1173c40b2956Swdenk support disks up to 2.1TB. 1174c40b2956Swdenk 11756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1176c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1177c40b2956Swdenk Default is 32bit. 1178c40b2956Swdenk 1179c609719bSwdenk- SCSI Support: 1180c609719bSwdenk At the moment only there is only support for the 1181c609719bSwdenk SYM53C8XX SCSI controller; define 1182c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1183c609719bSwdenk 11846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 11856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 11866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1187c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1188c609719bSwdenk devices. 11896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1190c609719bSwdenk 1191447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1192447c031bSStefan Reinauer SCSI devices found during the last scan. 1193447c031bSStefan Reinauer 1194c609719bSwdenk- NETWORK Support (PCI): 1195682011ffSwdenk CONFIG_E1000 1196ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1197ce5207e1SKyle Moffett 1198ce5207e1SKyle Moffett CONFIG_E1000_SPI 1199ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1200ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1201ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1202ce5207e1SKyle Moffett 1203ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1204ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1205ce5207e1SKyle Moffett example with the "sspi" command. 1206ce5207e1SKyle Moffett 1207ce5207e1SKyle Moffett CONFIG_CMD_E1000 1208ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1209ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1210682011ffSwdenk 1211ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 121211ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1213ac3315c2SAndre Schwarz 1214c609719bSwdenk CONFIG_EEPRO100 1215c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 121611ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1217c609719bSwdenk write routine for first time initialisation. 1218c609719bSwdenk 1219c609719bSwdenk CONFIG_TULIP 1220c609719bSwdenk Support for Digital 2114x chips. 1221c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1222c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1223c609719bSwdenk 1224c609719bSwdenk CONFIG_NATSEMI 1225c609719bSwdenk Support for National dp83815 chips. 1226c609719bSwdenk 1227c609719bSwdenk CONFIG_NS8382X 1228c609719bSwdenk Support for National dp8382[01] gigabit chips. 1229c609719bSwdenk 123045219c46Swdenk- NETWORK Support (other): 123145219c46Swdenk 1232c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1233c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1234c041e9d2SJens Scharsig 1235c041e9d2SJens Scharsig CONFIG_RMII 1236c041e9d2SJens Scharsig Define this to use reduced MII inteface 1237c041e9d2SJens Scharsig 1238c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1239c041e9d2SJens Scharsig If this defined, the driver is quiet. 1240c041e9d2SJens Scharsig The driver doen't show link status messages. 1241c041e9d2SJens Scharsig 1242efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1243efdd7319SRob Herring Support for the Calxeda XGMAC device 1244efdd7319SRob Herring 12453bb46d23SAshok CONFIG_LAN91C96 124645219c46Swdenk Support for SMSC's LAN91C96 chips. 124745219c46Swdenk 124845219c46Swdenk CONFIG_LAN91C96_BASE 124945219c46Swdenk Define this to hold the physical address 125045219c46Swdenk of the LAN91C96's I/O space 125145219c46Swdenk 125245219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 125345219c46Swdenk Define this to enable 32 bit addressing 125445219c46Swdenk 12553bb46d23SAshok CONFIG_SMC91111 1256f39748aeSwdenk Support for SMSC's LAN91C111 chip 1257f39748aeSwdenk 1258f39748aeSwdenk CONFIG_SMC91111_BASE 1259f39748aeSwdenk Define this to hold the physical address 1260f39748aeSwdenk of the device (I/O space) 1261f39748aeSwdenk 1262f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1263f39748aeSwdenk Define this if data bus is 32 bits 1264f39748aeSwdenk 1265f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1266f39748aeSwdenk Define this to use i/o functions instead of macros 1267f39748aeSwdenk (some hardware wont work with macros) 1268f39748aeSwdenk 1269dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1270dc02badaSHeiko Schocher Support for davinci emac 1271dc02badaSHeiko Schocher 1272dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1273dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1274dc02badaSHeiko Schocher 1275b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1276b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1277b3dbf4a5SMacpaul Lin 1278b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1279b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1280b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1281b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1282b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1283b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1284b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1285b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1286b3dbf4a5SMacpaul Lin 1287c2fff331SMike Rapoport CONFIG_SMC911X 1288557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1289557b377dSJens Gehrlein 1290c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1291557b377dSJens Gehrlein Define this to hold the physical address 1292557b377dSJens Gehrlein of the device (I/O space) 1293557b377dSJens Gehrlein 1294c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1295557b377dSJens Gehrlein Define this if data bus is 32 bits 1296557b377dSJens Gehrlein 1297c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1298557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1299557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1300c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1301557b377dSJens Gehrlein 13023d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13033d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13043d0075faSYoshihiro Shimoda 13053d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13063d0075faSYoshihiro Shimoda Define the number of ports to be used 13073d0075faSYoshihiro Shimoda 13083d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13093d0075faSYoshihiro Shimoda Define the ETH PHY's address 13103d0075faSYoshihiro Shimoda 131168260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 131268260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 131368260aabSYoshihiro Shimoda 13145e124724SVadim Bendebury- TPM Support: 131590899cc0SChe-liang Chiou CONFIG_TPM 131690899cc0SChe-liang Chiou Support TPM devices. 131790899cc0SChe-liang Chiou 13181b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13191b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13201b393db5STom Wai-Hong Tam per system is supported at this time. 13211b393db5STom Wai-Hong Tam 13221b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13231b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13241b393db5STom Wai-Hong Tam 13251b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13261b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13271b393db5STom Wai-Hong Tam 13281b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13291b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13301b393db5STom Wai-Hong Tam 1331c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1332c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1333c01939c7SDirk Eibach 133490899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 13355e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 13365e124724SVadim Bendebury per system is supported at this time. 13375e124724SVadim Bendebury 13385e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 13395e124724SVadim Bendebury Base address where the generic TPM device is mapped 13405e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 13415e124724SVadim Bendebury 0xfed40000. 13425e124724SVadim Bendebury 1343be6c1529SReinhard Pfau CONFIG_CMD_TPM 1344be6c1529SReinhard Pfau Add tpm monitor functions. 1345be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1346be6c1529SReinhard Pfau provides monitor access to authorized functions. 1347be6c1529SReinhard Pfau 1348be6c1529SReinhard Pfau CONFIG_TPM 1349be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1350be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1351be6c1529SReinhard Pfau Requires support for a TPM device. 1352be6c1529SReinhard Pfau 1353be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1354be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1355be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1356be6c1529SReinhard Pfau 1357c609719bSwdenk- USB Support: 1358c609719bSwdenk At the moment only the UHCI host controller is 13594d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1360c609719bSwdenk CONFIG_USB_UHCI to enable it. 1361c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 136230d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1363c609719bSwdenk storage devices. 1364c609719bSwdenk Note: 1365c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1366c609719bSwdenk (TEAC FD-05PUB). 13674d13cbadSwdenk MPC5200 USB requires additional defines: 13684d13cbadSwdenk CONFIG_USB_CLOCK 13694d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1370307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1371307ecb6dSEric Millbrandt for USB on PSC3 13724d13cbadSwdenk CONFIG_USB_CONFIG 13734d13cbadSwdenk for differential drivers: 0x00001000 13744d13cbadSwdenk for single ended drivers: 0x00005000 1375307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1376307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 13776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1378fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1379fdcfaa1bSZhang Wei instead of using asynchronous interrupts 13804d13cbadSwdenk 13819ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 13829ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 13839ab4ce22SSimon Glass 1384aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1385aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1386aa155058SKuo-Jung Su 138716c8d5e7SWolfgang Denk- USB Device: 138816c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 138916c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 139016c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 139111ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 139216c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 139316c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 139416c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 139516c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 139616c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 139716c8d5e7SWolfgang Denk a Linux host by 139816c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 139916c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 140016c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 140116c8d5e7SWolfgang Denk might be defined in YourBoardName.h 140216c8d5e7SWolfgang Denk 140316c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 140416c8d5e7SWolfgang Denk Define this to build a UDC device 140516c8d5e7SWolfgang Denk 140616c8d5e7SWolfgang Denk CONFIG_USB_TTY 140716c8d5e7SWolfgang Denk Define this to have a tty type of device available to 140816c8d5e7SWolfgang Denk talk to the UDC device 140916c8d5e7SWolfgang Denk 1410f9da0f89SVipin KUMAR CONFIG_USBD_HS 1411f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1412f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1413f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1414f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1415f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1416f9da0f89SVipin KUMAR speed. 1417f9da0f89SVipin KUMAR 14186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 141916c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 142016c8d5e7SWolfgang Denk be set to usbtty. 142116c8d5e7SWolfgang Denk 142216c8d5e7SWolfgang Denk mpc8xx: 14236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 142416c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 142616c8d5e7SWolfgang Denk 14276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 142816c8d5e7SWolfgang Denk Derive USB clock from brgclk 14296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 143016c8d5e7SWolfgang Denk 143116c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 143216c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 143316c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 143416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 143516c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 143616c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 143716c8d5e7SWolfgang Denk 143816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 143916c8d5e7SWolfgang Denk Define this string as the name of your company for 144016c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 144116c8d5e7SWolfgang Denk 144216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 144316c8d5e7SWolfgang Denk Define this string as the name of your product 144416c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 144516c8d5e7SWolfgang Denk 144616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 144716c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 144816c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 144916c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 145016c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 145116c8d5e7SWolfgang Denk 145216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 145316c8d5e7SWolfgang Denk Define this as the unique Product ID 145416c8d5e7SWolfgang Denk for your device 145516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1456c609719bSwdenk 1457351e9b20SPrzemyslaw Marczak Some USB device drivers may need to check USB cable attachment. 1458351e9b20SPrzemyslaw Marczak In this case you can enable following config in BoardName.h: 1459351e9b20SPrzemyslaw Marczak CONFIG_USB_CABLE_CHECK 1460351e9b20SPrzemyslaw Marczak This enables function definition: 1461351e9b20SPrzemyslaw Marczak - usb_cable_connected() in include/usb.h 1462351e9b20SPrzemyslaw Marczak Implementation of this function is board-specific. 1463351e9b20SPrzemyslaw Marczak 1464d70a560fSIgor Grinberg- ULPI Layer Support: 1465d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1466d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1467d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1468d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1469d70a560fSIgor Grinberg viewport is supported. 1470d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1471d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 14726d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 14736d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 14746d365ea0SLucas Stach the appropriate value in Hz. 1475c609719bSwdenk 1476c609719bSwdenk- MMC Support: 1477c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1478c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1479c609719bSwdenk accessed from the boot prompt by mapping the device 1480c609719bSwdenk to physical memory similar to flash. Command line is 1481602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1482602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1483c609719bSwdenk 1484afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1485afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1486afb35666SYoshihiro Shimoda 1487afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1488afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1489afb35666SYoshihiro Shimoda 1490afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1491afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1492afb35666SYoshihiro Shimoda 1493b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1494b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1495b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1496b3ba6e94STom Rini 1497b3ba6e94STom Rini CONFIG_CMD_DFU 1498b3ba6e94STom Rini This enables the command "dfu" which is used to have 1499b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1500b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1501b3ba6e94STom Rini set and define the alt settings to expose to the host. 1502b3ba6e94STom Rini 1503b3ba6e94STom Rini CONFIG_DFU_MMC 1504b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1505b3ba6e94STom Rini 1506c6631764SPantelis Antoniou CONFIG_DFU_NAND 1507c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1508c6631764SPantelis Antoniou 1509a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1510a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1511a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1512a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1513a9479f04SAfzal Mohammed one that would help mostly the developer. 1514a9479f04SAfzal Mohammed 1515e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1516e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1517e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1518e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1519e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1520e7e75c70SHeiko Schocher 1521ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1522ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1523ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1524ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1525ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1526ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1527ea2453d5SPantelis Antoniou 1528001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1529001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1530001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1531001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1532001a8319SHeiko Schocher 1533001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1534001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1535001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1536001a8319SHeiko Schocher sending again an USB request to the device. 1537001a8319SHeiko Schocher 15386705d81eSwdenk- Journaling Flash filesystem support: 15396705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 15406705d81eSwdenk CONFIG_JFFS2_NAND_DEV 15416705d81eSwdenk Define these for a default partition on a NAND device 15426705d81eSwdenk 15436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 15446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 15456705d81eSwdenk Define these for a default partition on a NOR device 15466705d81eSwdenk 15476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 15486705d81eSwdenk Define this to create an own partition. You have to provide a 15496705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 15506705d81eSwdenk 15516705d81eSwdenk If you define only one JFFS2 partition you may also want to 15526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 15536705d81eSwdenk to disable the command chpart. This is the default when you 15546705d81eSwdenk have not defined a custom partition 15556705d81eSwdenk 1556c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1557c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1558656f4c65SDonggeun Kim 1559656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1560656f4c65SDonggeun Kim file in FAT formatted partition. 1561656f4c65SDonggeun Kim 1562656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1563656f4c65SDonggeun Kim user to write files to FAT. 1564c30a15e5SDonggeun Kim 156584cd9327SGabe BlackCBFS (Coreboot Filesystem) support 156684cd9327SGabe Black CONFIG_CMD_CBFS 156784cd9327SGabe Black 156884cd9327SGabe Black Define this to enable support for reading from a Coreboot 156984cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 157084cd9327SGabe Black and cbfsload. 157184cd9327SGabe Black 1572c609719bSwdenk- Keyboard Support: 1573c609719bSwdenk CONFIG_ISA_KEYBOARD 1574c609719bSwdenk 1575c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1576c609719bSwdenk support 1577c609719bSwdenk 1578c609719bSwdenk CONFIG_I8042_KBD 1579c609719bSwdenk Standard PC keyboard driver with US (is default) and 1580c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1581c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1582c609719bSwdenk for cfb_console. Supports cursor blinking. 1583c609719bSwdenk 1584713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1585713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1586713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1587713cb680SHung-ying Tyan which provides key scans on request. 1588713cb680SHung-ying Tyan 1589c609719bSwdenk- Video support: 1590c609719bSwdenk CONFIG_VIDEO 1591c609719bSwdenk 1592c609719bSwdenk Define this to enable video support (for output to 1593c609719bSwdenk video). 1594c609719bSwdenk 1595c609719bSwdenk CONFIG_VIDEO_CT69000 1596c609719bSwdenk 1597c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1598c609719bSwdenk 1599c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1600eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1601eeb1b77bSwdenk video output is selected via environment 'videoout' 1602eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1603eeb1b77bSwdenk assumed. 1604c609719bSwdenk 1605eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 160611ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1607eeb1b77bSwdenk are possible: 1608eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1609eeb1b77bSwdenk Following standard modes are supported (* is default): 1610eeb1b77bSwdenk 1611eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1612eeb1b77bSwdenk -------------+--------------------------------------------- 1613eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1614eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1615eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1616eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1617eeb1b77bSwdenk -------------+--------------------------------------------- 1618c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1619c609719bSwdenk 1620eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 16217817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1622eeb1b77bSwdenk 1623eeb1b77bSwdenk 1624a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1625a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1626a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1627a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1628a6c7ad2fSwdenk 16297d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 16307d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 16317d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 16327d3053fbSTimur Tabi support, and should also define these other macros: 16337d3053fbSTimur Tabi 16347d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 16357d3053fbSTimur Tabi CONFIG_VIDEO 16367d3053fbSTimur Tabi CONFIG_CMD_BMP 16377d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 16387d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 16397d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 16407d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 16417d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 16427d3053fbSTimur Tabi 1643ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1644ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1645ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1646ba8e76bdSTimur Tabi description of this variable. 16477d3053fbSTimur Tabi 1648058d59b0SSimon Glass CONFIG_VIDEO_VGA 1649058d59b0SSimon Glass 1650058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1651058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1652058d59b0SSimon Glass driver. 1653058d59b0SSimon Glass 1654058d59b0SSimon Glass 1655682011ffSwdenk- Keyboard Support: 1656682011ffSwdenk CONFIG_KEYBOARD 1657682011ffSwdenk 1658682011ffSwdenk Define this to enable a custom keyboard support. 1659682011ffSwdenk This simply calls drv_keyboard_init() which must be 1660682011ffSwdenk defined in your board-specific files. 1661682011ffSwdenk The only board using this so far is RBC823. 1662a6c7ad2fSwdenk 1663c609719bSwdenk- LCD Support: CONFIG_LCD 1664c609719bSwdenk 1665c609719bSwdenk Define this to enable LCD support (for output to LCD 1666c609719bSwdenk display); also select one of the supported displays 1667c609719bSwdenk by defining one of these: 1668c609719bSwdenk 166939cf4804SStelian Pop CONFIG_ATMEL_LCD: 167039cf4804SStelian Pop 167139cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 167239cf4804SStelian Pop 1673fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1674c609719bSwdenk 1675fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1676c609719bSwdenk 1677fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1678c609719bSwdenk 1679fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1680fd3103bbSwdenk Active, color, single scan. 1681fd3103bbSwdenk 1682fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1683fd3103bbSwdenk 1684fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1685c609719bSwdenk Active, color, single scan. 1686c609719bSwdenk 1687c609719bSwdenk CONFIG_SHARP_16x9 1688c609719bSwdenk 1689c609719bSwdenk Sharp 320x240. Active, color, single scan. 1690c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1691c609719bSwdenk 1692c609719bSwdenk CONFIG_SHARP_LQ64D341 1693c609719bSwdenk 1694c609719bSwdenk Sharp LQ64D341 display, 640x480. 1695c609719bSwdenk Active, color, single scan. 1696c609719bSwdenk 1697c609719bSwdenk CONFIG_HLD1045 1698c609719bSwdenk 1699c609719bSwdenk HLD1045 display, 640x480. 1700c609719bSwdenk Active, color, single scan. 1701c609719bSwdenk 1702c609719bSwdenk CONFIG_OPTREX_BW 1703c609719bSwdenk 1704c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1705c609719bSwdenk or 1706c609719bSwdenk Hitachi LMG6912RPFC-00T 1707c609719bSwdenk or 1708c609719bSwdenk Hitachi SP14Q002 1709c609719bSwdenk 1710c609719bSwdenk 320x240. Black & white. 1711c609719bSwdenk 1712c609719bSwdenk Normally display is black on white background; define 17136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1714c609719bSwdenk 1715676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1716676d319eSSimon Glass 1717676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1718676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1719676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1720676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1721676d319eSSimon Glass a per-section basis. 1722676d319eSSimon Glass 17230d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 17240d89efefSSimon Glass 17250d89efefSSimon Glass When the console need to be scrolled, this is the number of 17260d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 17270d89efefSSimon Glass the console jump but can help speed up operation when scrolling 17280d89efefSSimon Glass is slow. 1729676d319eSSimon Glass 173045d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 173145d7f525STom Wai-Hong Tam 173245d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 173345d7f525STom Wai-Hong Tam 1734735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1735735987c5STom Wai-Hong Tam 1736735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1737735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1738735987c5STom Wai-Hong Tam 17397152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1740d791b1dcSwdenk 1741d791b1dcSwdenk If this option is set, the environment is checked for 1742d791b1dcSwdenk a variable "splashimage". If found, the usual display 1743d791b1dcSwdenk of logo, copyright and system information on the LCD 1744e94d2cd9Swdenk is suppressed and the BMP image at the address 1745d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1746d791b1dcSwdenk console is redirected to the "nulldev", too. This 1747d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1748d791b1dcSwdenk loaded very quickly after power-on. 1749d791b1dcSwdenk 1750c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1751c0880485SNikita Kiryanov 1752c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1753c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 17541551df35STom Rini (see README.displaying-bmps). 1755c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1756c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1757c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1758c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1759c0880485SNikita Kiryanov there is no need to set this option. 1760c0880485SNikita Kiryanov 17611ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 17621ca298ceSMatthias Weisser 17631ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 17641ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 17651ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 17661ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 17671ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 17681ca298ceSMatthias Weisser specify 'm' for centering the image. 17691ca298ceSMatthias Weisser 17701ca298ceSMatthias Weisser Example: 17711ca298ceSMatthias Weisser setenv splashpos m,m 17721ca298ceSMatthias Weisser => image at center of screen 17731ca298ceSMatthias Weisser 17741ca298ceSMatthias Weisser setenv splashpos 30,20 17751ca298ceSMatthias Weisser => image at x = 30 and y = 20 17761ca298ceSMatthias Weisser 17771ca298ceSMatthias Weisser setenv splashpos -10,m 17781ca298ceSMatthias Weisser => vertically centered image 17791ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 17801ca298ceSMatthias Weisser 178198f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 178298f4a3dfSStefan Roese 178398f4a3dfSStefan Roese If this option is set, additionally to standard BMP 178498f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 178598f4a3dfSStefan Roese splashscreen support or the bmp command. 178698f4a3dfSStefan Roese 1787d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1788d5011762SAnatolij Gustschin 1789d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1790d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1791d5011762SAnatolij Gustschin bmp command. 1792d5011762SAnatolij Gustschin 1793f2b96dfbSLei Wen- Do compresssing for memory range: 1794f2b96dfbSLei Wen CONFIG_CMD_ZIP 1795f2b96dfbSLei Wen 1796f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1797f2b96dfbSLei Wen to compress the specified memory at its best effort. 1798f2b96dfbSLei Wen 1799c29fdfc1Swdenk- Compression support: 18008ef70478SKees Cook CONFIG_GZIP 18018ef70478SKees Cook 18028ef70478SKees Cook Enabled by default to support gzip compressed images. 18038ef70478SKees Cook 1804c29fdfc1Swdenk CONFIG_BZIP2 1805c29fdfc1Swdenk 1806c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1807c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1808c29fdfc1Swdenk compressed images are supported. 1809c29fdfc1Swdenk 1810c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 18116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1812c29fdfc1Swdenk be at least 4MB. 1813d791b1dcSwdenk 1814fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1815fc9c1727SLuigi 'Comio' Mantellini 1816fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1817fc9c1727SLuigi 'Comio' Mantellini images is included. 1818fc9c1727SLuigi 'Comio' Mantellini 1819fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1820fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1821fc9c1727SLuigi 'Comio' Mantellini formula: 1822fc9c1727SLuigi 'Comio' Mantellini 1823fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1824fc9c1727SLuigi 'Comio' Mantellini 1825fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1826fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1827fc9c1727SLuigi 'Comio' Mantellini 1828fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1829fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1830fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1831fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1832fc9c1727SLuigi 'Comio' Mantellini 1833fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1834fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 18356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1836fc9c1727SLuigi 'Comio' Mantellini 18378ef70478SKees Cook CONFIG_LZO 18388ef70478SKees Cook 18398ef70478SKees Cook If this option is set, support for LZO compressed images 18408ef70478SKees Cook is included. 18418ef70478SKees Cook 184217ea1177Swdenk- MII/PHY support: 184317ea1177Swdenk CONFIG_PHY_ADDR 184417ea1177Swdenk 184517ea1177Swdenk The address of PHY on MII bus. 184617ea1177Swdenk 184717ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 184817ea1177Swdenk 184917ea1177Swdenk The clock frequency of the MII bus 185017ea1177Swdenk 185117ea1177Swdenk CONFIG_PHY_GIGE 185217ea1177Swdenk 185317ea1177Swdenk If this option is set, support for speed/duplex 185411ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 185517ea1177Swdenk 185617ea1177Swdenk CONFIG_PHY_RESET_DELAY 185717ea1177Swdenk 185817ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 185917ea1177Swdenk reset before any MII register access is possible. 186017ea1177Swdenk For such PHY, set this option to the usec delay 186117ea1177Swdenk required. (minimum 300usec for LXT971A) 186217ea1177Swdenk 186317ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 186417ea1177Swdenk 186517ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 186617ea1177Swdenk command issued before MII status register can be read 186717ea1177Swdenk 1868c609719bSwdenk- Ethernet address: 1869c609719bSwdenk CONFIG_ETHADDR 1870c68a05feSrichardretanubun CONFIG_ETH1ADDR 1871c609719bSwdenk CONFIG_ETH2ADDR 1872c609719bSwdenk CONFIG_ETH3ADDR 1873c68a05feSrichardretanubun CONFIG_ETH4ADDR 1874c68a05feSrichardretanubun CONFIG_ETH5ADDR 1875c609719bSwdenk 187611ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 187711ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1878c609719bSwdenk is not determined automatically. 1879c609719bSwdenk 1880c609719bSwdenk- IP address: 1881c609719bSwdenk CONFIG_IPADDR 1882c609719bSwdenk 1883c609719bSwdenk Define a default value for the IP address to use for 188411ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1885c609719bSwdenk determined through e.g. bootp. 18861ebcd654SWolfgang Denk (Environment variable "ipaddr") 1887c609719bSwdenk 1888c609719bSwdenk- Server IP address: 1889c609719bSwdenk CONFIG_SERVERIP 1890c609719bSwdenk 1891c609719bSwdenk Defines a default value for the IP address of a TFTP 1892c609719bSwdenk server to contact when using the "tftboot" command. 18931ebcd654SWolfgang Denk (Environment variable "serverip") 1894c609719bSwdenk 189597cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 189697cfe861SRobin Getz 189797cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 189897cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 189997cfe861SRobin Getz 19001ebcd654SWolfgang Denk- Gateway IP address: 19011ebcd654SWolfgang Denk CONFIG_GATEWAYIP 19021ebcd654SWolfgang Denk 19031ebcd654SWolfgang Denk Defines a default value for the IP address of the 19041ebcd654SWolfgang Denk default router where packets to other networks are 19051ebcd654SWolfgang Denk sent to. 19061ebcd654SWolfgang Denk (Environment variable "gatewayip") 19071ebcd654SWolfgang Denk 19081ebcd654SWolfgang Denk- Subnet mask: 19091ebcd654SWolfgang Denk CONFIG_NETMASK 19101ebcd654SWolfgang Denk 19111ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 19121ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 19131ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 19141ebcd654SWolfgang Denk forwarded through a router. 19151ebcd654SWolfgang Denk (Environment variable "netmask") 19161ebcd654SWolfgang Denk 191753a5c424SDavid Updegraff- Multicast TFTP Mode: 191853a5c424SDavid Updegraff CONFIG_MCAST_TFTP 191953a5c424SDavid Updegraff 192053a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 192153a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 192211ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 192353a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 192453a5c424SDavid Updegraff multicast group. 192553a5c424SDavid Updegraff 1926c609719bSwdenk- BOOTP Recovery Mode: 1927c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1928c609719bSwdenk 1929c609719bSwdenk If you have many targets in a network that try to 1930c609719bSwdenk boot using BOOTP, you may want to avoid that all 1931c609719bSwdenk systems send out BOOTP requests at precisely the same 1932c609719bSwdenk moment (which would happen for instance at recovery 1933c609719bSwdenk from a power failure, when all systems will try to 1934c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1935c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1936c609719bSwdenk inserted before sending out BOOTP requests. The 19376c33c785SWolfgang Denk following delays are inserted then: 1938c609719bSwdenk 1939c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1940c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1941c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1942c609719bSwdenk 4th and following 1943c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1944c609719bSwdenk 1945fe389a82Sstroese- DHCP Advanced Options: 19461fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 19471fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1948fe389a82Sstroese 19491fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 19501fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 19511fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 19521fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 19531fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 19541fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 19551fe80d79SJon Loeliger CONFIG_BOOTP_DNS 19561fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 19571fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 19581fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 19591fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 19601fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 19612c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1962fe389a82Sstroese 19635d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 19645d110f0aSWilson Callan environment variable, not the BOOTP server. 1965fe389a82Sstroese 19662c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 19672c00e099SJoe Hershberger after the configured retry count, the call will fail 19682c00e099SJoe Hershberger instead of starting over. This can be used to fail over 19692c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 19702c00e099SJoe Hershberger is not available. 19712c00e099SJoe Hershberger 1972fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1973fe389a82Sstroese serverip from a DHCP server, it is possible that more 1974fe389a82Sstroese than one DNS serverip is offered to the client. 1975fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1976fe389a82Sstroese serverip will be stored in the additional environment 1977fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1978fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 19791fe80d79SJon Loeliger is defined. 1980fe389a82Sstroese 1981fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1982fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1983fe389a82Sstroese need the hostname of the DHCP requester. 19845d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 19851fe80d79SJon Loeliger of the "hostname" environment variable is passed as 19861fe80d79SJon Loeliger option 12 to the DHCP server. 1987fe389a82Sstroese 1988d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1989d9a2f416SAras Vaichas 1990d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1991d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1992d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1993d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1994d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1995d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1996d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1997d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1998d9a2f416SAras Vaichas that one of the retries will be successful but note that 1999d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2000d9a2f416SAras Vaichas this delay. 2001d9a2f416SAras Vaichas 2002d22c338eSJoe Hershberger - Link-local IP address negotiation: 2003d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2004d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2005d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2006d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2007d22c338eSJoe Hershberger 2008d22c338eSJoe Hershberger See doc/README.link-local for more information. 2009d22c338eSJoe Hershberger 2010a3d991bdSwdenk - CDP Options: 2011a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2012a3d991bdSwdenk 2013a3d991bdSwdenk The device id used in CDP trigger frames. 2014a3d991bdSwdenk 2015a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2016a3d991bdSwdenk 2017a3d991bdSwdenk A two character string which is prefixed to the MAC address 2018a3d991bdSwdenk of the device. 2019a3d991bdSwdenk 2020a3d991bdSwdenk CONFIG_CDP_PORT_ID 2021a3d991bdSwdenk 2022a3d991bdSwdenk A printf format string which contains the ascii name of 2023a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 202411ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2025a3d991bdSwdenk 2026a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2027a3d991bdSwdenk 2028a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2029a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2030a3d991bdSwdenk 2031a3d991bdSwdenk CONFIG_CDP_VERSION 2032a3d991bdSwdenk 2033a3d991bdSwdenk An ascii string containing the version of the software. 2034a3d991bdSwdenk 2035a3d991bdSwdenk CONFIG_CDP_PLATFORM 2036a3d991bdSwdenk 2037a3d991bdSwdenk An ascii string containing the name of the platform. 2038a3d991bdSwdenk 2039a3d991bdSwdenk CONFIG_CDP_TRIGGER 2040a3d991bdSwdenk 2041a3d991bdSwdenk A 32bit integer sent on the trigger. 2042a3d991bdSwdenk 2043a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2044a3d991bdSwdenk 2045a3d991bdSwdenk A 16bit integer containing the power consumption of the 2046a3d991bdSwdenk device in .1 of milliwatts. 2047a3d991bdSwdenk 2048a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2049a3d991bdSwdenk 2050a3d991bdSwdenk A byte containing the id of the VLAN. 2051a3d991bdSwdenk 2052c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2053c609719bSwdenk 2054c609719bSwdenk Several configurations allow to display the current 2055c609719bSwdenk status using a LED. For instance, the LED will blink 2056c609719bSwdenk fast while running U-Boot code, stop blinking as 2057c609719bSwdenk soon as a reply to a BOOTP request was received, and 2058c609719bSwdenk start blinking slow once the Linux kernel is running 2059c609719bSwdenk (supported by a status LED driver in the Linux 2060c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2061c609719bSwdenk feature in U-Boot. 2062c609719bSwdenk 20631df7bbbaSIgor Grinberg Additional options: 20641df7bbbaSIgor Grinberg 20651df7bbbaSIgor Grinberg CONFIG_GPIO_LED 20661df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 20671df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 20681df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 20691df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 20701df7bbbaSIgor Grinberg 20719dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 20729dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 20739dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 20749dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 20759dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 20769dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 20779dfdcdfeSIgor Grinberg 2078c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2079c609719bSwdenk 2080c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2081c609719bSwdenk on those systems that support this (optional) 2082c609719bSwdenk feature, like the TQM8xxL modules. 2083c609719bSwdenk 20843f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2085c609719bSwdenk 20863f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 20873f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 20883f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 20893f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 20903f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 20913f4978c7SHeiko Schocher interface. 20923f4978c7SHeiko Schocher 20933f4978c7SHeiko Schocher ported i2c driver to the new framework: 2094ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2095ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2096ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2097ea818dbbSHeiko Schocher for defining speed and slave address 2098ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2099ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2100ea818dbbSHeiko Schocher for defining speed and slave address 2101ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2102ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2103ea818dbbSHeiko Schocher for defining speed and slave address 2104ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2105ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2106ea818dbbSHeiko Schocher for defining speed and slave address 21073f4978c7SHeiko Schocher 210800f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 210900f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 211000f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 211100f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 211200f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 211300f792e0SHeiko Schocher bus. 211400f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 211500f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 211600f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 211700f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 211800f792e0SHeiko Schocher second bus. 211900f792e0SHeiko Schocher 21201f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 21211f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 21221f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 21231f2ba722SSimon Glass 100000 and the slave addr 0! 21241f2ba722SSimon Glass 2125880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2126880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2127880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2128880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2129880540deSDirk Eibach 2130fac96408Strem - drivers/i2c/i2c_mxc.c 2131fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2132fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2133fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2134fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2135fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2136fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2137fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2138fac96408Strem If thoses defines are not set, default value is 100000 2139fac96408Strem for speed, and 0 for slave. 2140fac96408Strem 21411086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 21421086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 21431086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 21441086bfa9SNobuhiro Iwamatsu 21451086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 21461086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 21471086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 21481086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 21491086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 21501086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 21511086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 21521086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 21531086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 21541086bfa9SNobuhiro Iwamatsu 21552035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 21562035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 21572035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 21582035d77dSNobuhiro Iwamatsu 21592035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 21602035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 21612035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 21622035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 21632035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 21642035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 21652035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 21662035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 21672035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 21682035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 21692035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 21702035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 21712035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 21722035d77dSNobuhiro Iwamatsu 21736789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 21746789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 21756789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 21766789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 21776789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 21786789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 21796789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 21806789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 21816789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 21826789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 21836789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 21846789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 21856789e84eSHeiko Schocher 21860bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 21870bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 21880bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 21890bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 21900bdffe71SHeiko Schocher 2191e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2192e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2193e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2194e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2195e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2196e717fc6dSNaveen Krishna Ch 21973f4978c7SHeiko Schocher additional defines: 21983f4978c7SHeiko Schocher 21993f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 22003f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 22013f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 22023f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 22033f4978c7SHeiko Schocher omit this define. 22043f4978c7SHeiko Schocher 22053f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 22063f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 22073f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 22083f4978c7SHeiko Schocher omit this define. 22093f4978c7SHeiko Schocher 22103f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 22113f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 22123f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 22133f4978c7SHeiko Schocher define. 22143f4978c7SHeiko Schocher 22153f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 22163f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 22173f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 22183f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 22193f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 22203f4978c7SHeiko Schocher 22213f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 22223f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 22233f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 22243f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 22253f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 22263f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 22273f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 22283f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 22293f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 22303f4978c7SHeiko Schocher } 22313f4978c7SHeiko Schocher 22323f4978c7SHeiko Schocher which defines 22333f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2234ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2235ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2236ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2237ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2238ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 22393f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2240ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2241ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 22423f4978c7SHeiko Schocher 22433f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 22443f4978c7SHeiko Schocher 2245ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 22463f4978c7SHeiko Schocher 22473f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 22483f4978c7SHeiko Schocher provides the following compelling advantages: 22493f4978c7SHeiko Schocher 22503f4978c7SHeiko Schocher - more than one i2c adapter is usable 22513f4978c7SHeiko Schocher - approved multibus support 22523f4978c7SHeiko Schocher - better i2c mux support 22533f4978c7SHeiko Schocher 22543f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 22553f4978c7SHeiko Schocher 2256ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2257ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2258ea818dbbSHeiko Schocher for the selected CPU. 2259c609719bSwdenk 2260b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2261602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2262b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2263b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2264c609719bSwdenk command line interface. 2265c609719bSwdenk 2266bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2267c609719bSwdenk 2268b37c7e5eSwdenk There are several other quantities that must also be 2269ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2270c609719bSwdenk 22716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2272b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 22736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 227411ccc33fSMarcel Ziswiler the CPU's i2c node address). 2275c609719bSwdenk 22768d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2277a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 22788d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 22798d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 22808d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2281b37c7e5eSwdenk 22825da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 22835da71efaSEric Millbrandt 22845da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 22855da71efaSEric Millbrandt chips might think that the current transfer is still 22865da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 22875da71efaSEric Millbrandt commands until the slave device responds. 22885da71efaSEric Millbrandt 2289b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2290b37c7e5eSwdenk 2291ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2292b37c7e5eSwdenk then the following macros need to be defined (examples are 2293b37c7e5eSwdenk from include/configs/lwmon.h): 2294c609719bSwdenk 2295c609719bSwdenk I2C_INIT 2296c609719bSwdenk 2297b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2298c609719bSwdenk controller or configure ports. 2299c609719bSwdenk 2300b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2301b37c7e5eSwdenk 2302c609719bSwdenk I2C_PORT 2303c609719bSwdenk 2304c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2305c609719bSwdenk assumes both bits are on the same port). Valid values 2306c609719bSwdenk are 0..3 for ports A..D. 2307c609719bSwdenk 2308c609719bSwdenk I2C_ACTIVE 2309c609719bSwdenk 2310c609719bSwdenk The code necessary to make the I2C data line active 2311c609719bSwdenk (driven). If the data line is open collector, this 2312c609719bSwdenk define can be null. 2313c609719bSwdenk 2314b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2315b37c7e5eSwdenk 2316c609719bSwdenk I2C_TRISTATE 2317c609719bSwdenk 2318c609719bSwdenk The code necessary to make the I2C data line tri-stated 2319c609719bSwdenk (inactive). If the data line is open collector, this 2320c609719bSwdenk define can be null. 2321c609719bSwdenk 2322b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2323b37c7e5eSwdenk 2324c609719bSwdenk I2C_READ 2325c609719bSwdenk 2326472d5460SYork Sun Code that returns true if the I2C data line is high, 2327472d5460SYork Sun false if it is low. 2328c609719bSwdenk 2329b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2330b37c7e5eSwdenk 2331c609719bSwdenk I2C_SDA(bit) 2332c609719bSwdenk 2333472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2334472d5460SYork Sun is false, it clears it (low). 2335c609719bSwdenk 2336b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2337b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2338b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2339b37c7e5eSwdenk 2340c609719bSwdenk I2C_SCL(bit) 2341c609719bSwdenk 2342472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2343472d5460SYork Sun is false, it clears it (low). 2344c609719bSwdenk 2345b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2346b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2347b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2348b37c7e5eSwdenk 2349c609719bSwdenk I2C_DELAY 2350c609719bSwdenk 2351c609719bSwdenk This delay is invoked four times per clock cycle so this 2352c609719bSwdenk controls the rate of data transfer. The data rate thus 2353b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2354b37c7e5eSwdenk like: 2355b37c7e5eSwdenk 2356b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2357c609719bSwdenk 2358793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2359793b5726SMike Frysinger 2360793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2361793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2362793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2363793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2364793b5726SMike Frysinger 2365793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2366793b5726SMike Frysinger the generic GPIO functions. 2367793b5726SMike Frysinger 23686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 236947cd00faSwdenk 237047cd00faSwdenk When a board is reset during an i2c bus transfer 237147cd00faSwdenk chips might think that the current transfer is still 237247cd00faSwdenk in progress. On some boards it is possible to access 237347cd00faSwdenk the i2c SCLK line directly, either by using the 237447cd00faSwdenk processor pin as a GPIO or by having a second pin 237547cd00faSwdenk connected to the bus. If this option is defined a 237647cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 237747cd00faSwdenk is run early in the boot sequence. 237847cd00faSwdenk 237926a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 238026a33504SRichard Retanubun 238126a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 238226a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 238326a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 238426a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 238526a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 238626a33504SRichard Retanubun controller provide such a method. It is called at the end of 238726a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 238826a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 238926a33504SRichard Retanubun 239017ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 239117ea1177Swdenk 239217ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 239317ea1177Swdenk in u-boot bd_info structure based on u-boot environment 239417ea1177Swdenk variable "i2cfast". (see also i2cfast) 239517ea1177Swdenk 2396bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2397bb99ad6dSBen Warren 2398bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2399bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2400bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2401bb99ad6dSBen Warren Note that bus numbering is zero-based. 2402bb99ad6dSBen Warren 24036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2404bb99ad6dSBen Warren 2405bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 24060f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 24070f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 24080f89c54bSPeter Tyser a 1D array of device addresses 2409bb99ad6dSBen Warren 2410bb99ad6dSBen Warren e.g. 2411bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 24126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2413bb99ad6dSBen Warren 2414bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2415bb99ad6dSBen Warren 2416bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 24176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2418bb99ad6dSBen Warren 2419bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2420bb99ad6dSBen Warren 24216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2422be5e6181STimur Tabi 2423be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2424be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2425be5e6181STimur Tabi 24266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 24270dc018ecSStefan Roese 24280dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 24290dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 24300dc018ecSStefan Roese 24316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 24320dc018ecSStefan Roese 24330dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 24340dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 24350dc018ecSStefan Roese 24366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 24379ebbb54fSVictor Gallardo 24389ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 24399ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 24409ebbb54fSVictor Gallardo specified DTT device. 24419ebbb54fSVictor Gallardo 24422ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 24432ac6985aSAndrew Dyer 24442ac6985aSAndrew Dyer defining this will force the i2c_read() function in 24452ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 24462ac6985aSAndrew Dyer between writing the address pointer and reading the 24472ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 24482ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 24492ac6985aSAndrew Dyer devices can use either method, but some require one or 24502ac6985aSAndrew Dyer the other. 2451be5e6181STimur Tabi 2452c609719bSwdenk- SPI Support: CONFIG_SPI 2453c609719bSwdenk 2454c609719bSwdenk Enables SPI driver (so far only tested with 2455c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2456c609719bSwdenk D/As on the SACSng board) 2457c609719bSwdenk 24586639562eSYoshihiro Shimoda CONFIG_SH_SPI 24596639562eSYoshihiro Shimoda 24606639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 24616639562eSYoshihiro Shimoda only SH7757 is supported. 24626639562eSYoshihiro Shimoda 2463c609719bSwdenk CONFIG_SPI_X 2464c609719bSwdenk 2465c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2466c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2467c609719bSwdenk 2468c609719bSwdenk CONFIG_SOFT_SPI 2469c609719bSwdenk 2470c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2471c609719bSwdenk using hardware support. This is a general purpose 2472c609719bSwdenk driver that only requires three general I/O port pins 2473c609719bSwdenk (two outputs, one input) to function. If this is 2474c609719bSwdenk defined, the board configuration must define several 2475c609719bSwdenk SPI configuration items (port pins to use, etc). For 2476c609719bSwdenk an example, see include/configs/sacsng.h. 2477c609719bSwdenk 247804a9e118SBen Warren CONFIG_HARD_SPI 247904a9e118SBen Warren 248004a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 248104a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 248204a9e118SBen Warren must define a list of chip-select function pointers. 248304a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 248404a9e118SBen Warren example, see include/configs/mpc8349emds.h. 248504a9e118SBen Warren 248638254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 248738254f45SGuennadi Liakhovetski 248838254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 24892e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 249038254f45SGuennadi Liakhovetski 24910133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 24920133502eSMatthias Fuchs 24930133502eSMatthias Fuchs Enables FPGA subsystem. 24940133502eSMatthias Fuchs 24950133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 24960133502eSMatthias Fuchs 24970133502eSMatthias Fuchs Enables support for specific chip vendors. 24980133502eSMatthias Fuchs (ALTERA, XILINX) 24990133502eSMatthias Fuchs 25000133502eSMatthias Fuchs CONFIG_FPGA_<family> 25010133502eSMatthias Fuchs 25020133502eSMatthias Fuchs Enables support for FPGA family. 25030133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 25040133502eSMatthias Fuchs 25050133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2506c609719bSwdenk 2507c609719bSwdenk Specify the number of FPGA devices to support. 2508c609719bSwdenk 25096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2510c609719bSwdenk 2511c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2512c609719bSwdenk 25136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2514c609719bSwdenk 2515c609719bSwdenk Enable checks on FPGA configuration interface busy 2516c609719bSwdenk status by the configuration function. This option 2517c609719bSwdenk will require a board or device specific function to 2518c609719bSwdenk be written. 2519c609719bSwdenk 2520c609719bSwdenk CONFIG_FPGA_DELAY 2521c609719bSwdenk 2522c609719bSwdenk If defined, a function that provides delays in the FPGA 2523c609719bSwdenk configuration driver. 2524c609719bSwdenk 25256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2526c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2527c609719bSwdenk 25286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2529c609719bSwdenk 2530c609719bSwdenk Check for configuration errors during FPGA bitfile 2531c609719bSwdenk loading. For example, abort during Virtex II 2532c609719bSwdenk configuration if the INIT_B line goes low (which 2533c609719bSwdenk indicated a CRC error). 2534c609719bSwdenk 25356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2536c609719bSwdenk 2537c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2538c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2539c609719bSwdenk FPGA configuration sequence. The default time is 500 254011ccc33fSMarcel Ziswiler ms. 2541c609719bSwdenk 25426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2543c609719bSwdenk 2544c609719bSwdenk Maximum time to wait for BUSY to deassert during 254511ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2546c609719bSwdenk 25476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2548c609719bSwdenk 2549c609719bSwdenk Time to wait after FPGA configuration. The default is 255011ccc33fSMarcel Ziswiler 200 ms. 2551c609719bSwdenk 2552c609719bSwdenk- Configuration Management: 2553c609719bSwdenk CONFIG_IDENT_STRING 2554c609719bSwdenk 2555c609719bSwdenk If defined, this string will be added to the U-Boot 2556c609719bSwdenk version information (U_BOOT_VERSION) 2557c609719bSwdenk 2558c609719bSwdenk- Vendor Parameter Protection: 2559c609719bSwdenk 2560c609719bSwdenk U-Boot considers the values of the environment 2561c609719bSwdenk variables "serial#" (Board Serial Number) and 25627152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2563c609719bSwdenk are set once by the board vendor / manufacturer, and 2564c609719bSwdenk protects these variables from casual modification by 2565c609719bSwdenk the user. Once set, these variables are read-only, 2566c609719bSwdenk and write or delete attempts are rejected. You can 256711ccc33fSMarcel Ziswiler change this behaviour: 2568c609719bSwdenk 2569c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2570c609719bSwdenk file, the write protection for vendor parameters is 257147cd00faSwdenk completely disabled. Anybody can change or delete 2572c609719bSwdenk these parameters. 2573c609719bSwdenk 2574c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2575c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 257611ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2577c609719bSwdenk which can be changed exactly ONCE by the user. [The 2578c609719bSwdenk serial# is unaffected by this, i. e. it remains 2579c609719bSwdenk read-only.] 2580c609719bSwdenk 25812598090bSJoe Hershberger The same can be accomplished in a more flexible way 25822598090bSJoe Hershberger for any variable by configuring the type of access 25832598090bSJoe Hershberger to allow for those variables in the ".flags" variable 25842598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 25852598090bSJoe Hershberger 2586c609719bSwdenk- Protected RAM: 2587c609719bSwdenk CONFIG_PRAM 2588c609719bSwdenk 2589c609719bSwdenk Define this variable to enable the reservation of 2590c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2591c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2592c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2593c609719bSwdenk this default value by defining an environment 2594c609719bSwdenk variable "pram" to the number of kB you want to 2595c609719bSwdenk reserve. Note that the board info structure will 2596c609719bSwdenk still show the full amount of RAM. If pRAM is 2597c609719bSwdenk reserved, a new environment variable "mem" will 2598c609719bSwdenk automatically be defined to hold the amount of 2599c609719bSwdenk remaining RAM in a form that can be passed as boot 2600c609719bSwdenk argument to Linux, for instance like that: 2601c609719bSwdenk 2602fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2603c609719bSwdenk saveenv 2604c609719bSwdenk 2605c609719bSwdenk This way you can tell Linux not to use this memory, 2606c609719bSwdenk either, which results in a memory region that will 2607c609719bSwdenk not be affected by reboots. 2608c609719bSwdenk 2609c609719bSwdenk *WARNING* If your board configuration uses automatic 2610c609719bSwdenk detection of the RAM size, you must make sure that 2611c609719bSwdenk this memory test is non-destructive. So far, the 2612c609719bSwdenk following board configurations are known to be 2613c609719bSwdenk "pRAM-clean": 2614c609719bSwdenk 26151b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 26161b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2617544d97e9SWolfgang Denk FLAGADM, TQM8260 2618c609719bSwdenk 261940fef049SGabe Black- Access to physical memory region (> 4GB) 262040fef049SGabe Black Some basic support is provided for operations on memory not 262140fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 262240fef049SGabe Black support access to more than 4GB of memory on 32-bit 262340fef049SGabe Black machines using physical address extension or similar. 262440fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 262540fef049SGabe Black currently only supports clearing the memory. 262640fef049SGabe Black 2627c609719bSwdenk- Error Recovery: 2628c609719bSwdenk CONFIG_PANIC_HANG 2629c609719bSwdenk 2630c609719bSwdenk Define this variable to stop the system in case of a 2631c609719bSwdenk fatal error, so that you have to reset it manually. 2632c609719bSwdenk This is probably NOT a good idea for an embedded 263311ccc33fSMarcel Ziswiler system where you want the system to reboot 2634c609719bSwdenk automatically as fast as possible, but it may be 2635c609719bSwdenk useful during development since you can try to debug 2636c609719bSwdenk the conditions that lead to the situation. 2637c609719bSwdenk 2638c609719bSwdenk CONFIG_NET_RETRY_COUNT 2639c609719bSwdenk 2640c609719bSwdenk This variable defines the number of retries for 2641c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2642c609719bSwdenk before giving up the operation. If not defined, a 2643c609719bSwdenk default value of 5 is used. 2644c609719bSwdenk 264540cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 264640cb90eeSGuennadi Liakhovetski 264740cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 264840cb90eeSGuennadi Liakhovetski 264948a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 265048a3e999STetsuyuki Kobayashi 265148a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 265248a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 265348a3e999STetsuyuki Kobayashi try longer timeout such as 265448a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 265548a3e999STetsuyuki Kobayashi 2656c609719bSwdenk- Command Interpreter: 26578078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 265804a85b3bSwdenk 265904a85b3bSwdenk Enable auto completion of commands using TAB. 266004a85b3bSwdenk 26618078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 26628078f1a5SWolfgang Denk for the "hush" shell. 26638078f1a5SWolfgang Denk 26648078f1a5SWolfgang Denk 26656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2666c609719bSwdenk 2667c609719bSwdenk Define this variable to enable the "hush" shell (from 2668c609719bSwdenk Busybox) as command line interpreter, thus enabling 2669c609719bSwdenk powerful command line syntax like 2670c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2671c609719bSwdenk constructs ("shell scripts"). 2672c609719bSwdenk 2673c609719bSwdenk If undefined, you get the old, much simpler behaviour 2674c609719bSwdenk with a somewhat smaller memory footprint. 2675c609719bSwdenk 2676c609719bSwdenk 26776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2678c609719bSwdenk 2679c609719bSwdenk This defines the secondary prompt string, which is 2680c609719bSwdenk printed when the command interpreter needs more input 2681c609719bSwdenk to complete a command. Usually "> ". 2682c609719bSwdenk 2683c609719bSwdenk Note: 2684c609719bSwdenk 2685c609719bSwdenk In the current implementation, the local variables 2686c609719bSwdenk space and global environment variables space are 2687c609719bSwdenk separated. Local variables are those you define by 26883b57fe0aSwdenk simply typing `name=value'. To access a local 2689c609719bSwdenk variable later on, you have write `$name' or 26903b57fe0aSwdenk `${name}'; to execute the contents of a variable 26913b57fe0aSwdenk directly type `$name' at the command prompt. 2692c609719bSwdenk 2693c609719bSwdenk Global environment variables are those you use 2694c609719bSwdenk setenv/printenv to work with. To run a command stored 2695c609719bSwdenk in such a variable, you need to use the run command, 2696c609719bSwdenk and you must not use the '$' sign to access them. 2697c609719bSwdenk 2698c609719bSwdenk To store commands and special characters in a 2699c609719bSwdenk variable, please use double quotation marks 2700c609719bSwdenk surrounding the whole text of the variable, instead 2701c609719bSwdenk of the backslashes before semicolons and special 2702c609719bSwdenk symbols. 2703c609719bSwdenk 2704aa0c71acSWolfgang Denk- Commandline Editing and History: 2705aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2706aa0c71acSWolfgang Denk 270711ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2708aa0c71acSWolfgang Denk commandline input operations 2709aa0c71acSWolfgang Denk 2710a8c7c708Swdenk- Default Environment: 2711c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2712c609719bSwdenk 2713c609719bSwdenk Define this to contain any number of null terminated 2714c609719bSwdenk strings (variable = value pairs) that will be part of 27157152b1d0Swdenk the default environment compiled into the boot image. 27162262cfeeSwdenk 2717c609719bSwdenk For example, place something like this in your 2718c609719bSwdenk board's config file: 2719c609719bSwdenk 2720c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2721c609719bSwdenk "myvar1=value1\0" \ 2722c609719bSwdenk "myvar2=value2\0" 2723c609719bSwdenk 2724c609719bSwdenk Warning: This method is based on knowledge about the 2725c609719bSwdenk internal format how the environment is stored by the 27262262cfeeSwdenk U-Boot code. This is NOT an official, exported 2727c609719bSwdenk interface! Although it is unlikely that this format 27287152b1d0Swdenk will change soon, there is no guarantee either. 2729c609719bSwdenk You better know what you are doing here. 2730c609719bSwdenk 2731c609719bSwdenk Note: overly (ab)use of the default environment is 2732c609719bSwdenk discouraged. Make sure to check other ways to preset 273374de7aefSWolfgang Denk the environment like the "source" command or the 2734c609719bSwdenk boot command first. 2735c609719bSwdenk 27365e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 27375e724ca2SStephen Warren 27385e724ca2SStephen Warren Define this in order to add variables describing the 27395e724ca2SStephen Warren U-Boot build configuration to the default environment. 27405e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 27415e724ca2SStephen Warren 27425e724ca2SStephen Warren Enabling this option will cause the following to be defined: 27435e724ca2SStephen Warren 27445e724ca2SStephen Warren - CONFIG_SYS_ARCH 27455e724ca2SStephen Warren - CONFIG_SYS_CPU 27465e724ca2SStephen Warren - CONFIG_SYS_BOARD 27475e724ca2SStephen Warren - CONFIG_SYS_VENDOR 27485e724ca2SStephen Warren - CONFIG_SYS_SOC 27495e724ca2SStephen Warren 27507e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 27517e27f89fSTom Rini 27527e27f89fSTom Rini Define this in order to add variables describing certain 27537e27f89fSTom Rini run-time determined information about the hardware to the 27547e27f89fSTom Rini environment. These will be named board_name, board_rev. 27557e27f89fSTom Rini 275606fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 275706fd8538SSimon Glass 275806fd8538SSimon Glass Normally the environment is loaded when the board is 275906fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 276006fd8538SSimon Glass that so that the environment is not available until 276106fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 276206fd8538SSimon Glass this is instead controlled by the value of 276306fd8538SSimon Glass /config/load-environment. 276406fd8538SSimon Glass 2765a8c7c708Swdenk- DataFlash Support: 27662abbe075Swdenk CONFIG_HAS_DATAFLASH 27672abbe075Swdenk 27682abbe075Swdenk Defining this option enables DataFlash features and 27692abbe075Swdenk allows to read/write in Dataflash via the standard 27702abbe075Swdenk commands cp, md... 27712abbe075Swdenk 2772f61ec45eSEric Nelson- Serial Flash support 2773f61ec45eSEric Nelson CONFIG_CMD_SF 2774f61ec45eSEric Nelson 2775f61ec45eSEric Nelson Defining this option enables SPI flash commands 2776f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2777f61ec45eSEric Nelson 2778f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2779f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2780f61ec45eSEric Nelson commands. 2781f61ec45eSEric Nelson 2782f61ec45eSEric Nelson The following defaults may be provided by the platform 2783f61ec45eSEric Nelson to handle the common case when only a single serial 2784f61ec45eSEric Nelson flash is present on the system. 2785f61ec45eSEric Nelson 2786f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2787f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2788f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2789f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2790f61ec45eSEric Nelson 279124007273SSimon Glass CONFIG_CMD_SF_TEST 279224007273SSimon Glass 279324007273SSimon Glass Define this option to include a destructive SPI flash 279424007273SSimon Glass test ('sf test'). 279524007273SSimon Glass 27961dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 27971dcd6d03SJagannadha Sutradharudu Teki 27981dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 27991dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 28001dcd6d03SJagannadha Sutradharudu Teki 2801b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2802b902e07cSJagannadha Sutradharudu Teki 2803b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2804b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2805b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2806b902e07cSJagannadha Sutradharudu Teki 28073f85ce27Swdenk- SystemACE Support: 28083f85ce27Swdenk CONFIG_SYSTEMACE 28093f85ce27Swdenk 28103f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 28113f85ce27Swdenk chips attached via some sort of local bus. The address 281211ccc33fSMarcel Ziswiler of the chip must also be defined in the 28136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 28143f85ce27Swdenk 28153f85ce27Swdenk #define CONFIG_SYSTEMACE 28166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 28173f85ce27Swdenk 28183f85ce27Swdenk When SystemACE support is added, the "ace" device type 28193f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 28203f85ce27Swdenk 2821ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2822ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2823ecb0ccd9SWolfgang Denk 282428cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2825ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 282628cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2827ecb0ccd9SWolfgang Denk number generator is used. 2828ecb0ccd9SWolfgang Denk 282928cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 283028cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 283128cb9375SWolfgang Denk defined, the normal port 69 is used. 283228cb9375SWolfgang Denk 283328cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2834ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2835ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2836ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2837ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2838ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2839ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2840ecb0ccd9SWolfgang Denk 2841bf36c5d5SSimon Glass- Hashing support: 2842bf36c5d5SSimon Glass CONFIG_CMD_HASH 2843bf36c5d5SSimon Glass 2844bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2845bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2846bf36c5d5SSimon Glass 2847bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2848bf36c5d5SSimon Glass 2849bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2850bf36c5d5SSimon Glass size a little. 2851bf36c5d5SSimon Glass 2852bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2853bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2854bf36c5d5SSimon Glass 2855bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2856bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2857bf36c5d5SSimon Glass 2858a11f1873SRobert Winkler- Freescale i.MX specific commands: 2859a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2860a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2861a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2862a11f1873SRobert Winkler 2863a11f1873SRobert Winkler CONFIG_CMD_BMODE 2864a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2865a11f1873SRobert Winkler a boot from specific media. 2866a11f1873SRobert Winkler 2867a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2868a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2869a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2870a11f1873SRobert Winkler will set it back to normal. This command currently 2871a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2872a11f1873SRobert Winkler 287319c402afSSimon Glass- Signing support: 287419c402afSSimon Glass CONFIG_RSA 287519c402afSSimon Glass 287619c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 28778bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 287819c402afSSimon Glass 287919c402afSSimon Glass The signing part is build into mkimage regardless of this 288019c402afSSimon Glass option. 288119c402afSSimon Glass 28829e50c406SHeiko Schocher- bootcount support: 28839e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 28849e50c406SHeiko Schocher 28859e50c406SHeiko Schocher This enables the bootcounter support, see: 28869e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 28879e50c406SHeiko Schocher 28889e50c406SHeiko Schocher CONFIG_AT91SAM9XE 28899e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 28909e50c406SHeiko Schocher CONFIG_BLACKFIN 28919e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 28929e50c406SHeiko Schocher CONFIG_SOC_DA8XX 28939e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 28949e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 28959e50c406SHeiko Schocher enable support for the bootcounter in RAM 28969e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 28979e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 28989e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 28999e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 29009e50c406SHeiko Schocher the bootcounter. 29019e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 290219c402afSSimon Glass 2903a8c7c708Swdenk- Show boot progress: 2904c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2905c609719bSwdenk 2906c609719bSwdenk Defining this option allows to add some board- 2907c609719bSwdenk specific code (calling a user-provided function 2908c609719bSwdenk "show_boot_progress(int)") that enables you to show 2909c609719bSwdenk the system's boot progress on some display (for 2910c609719bSwdenk example, some LED's) on your board. At the moment, 2911c609719bSwdenk the following checkpoints are implemented: 2912c609719bSwdenk 29133a608ca0SSimon Glass- Detailed boot stage timing 29143a608ca0SSimon Glass CONFIG_BOOTSTAGE 29153a608ca0SSimon Glass Define this option to get detailed timing of each stage 29163a608ca0SSimon Glass of the boot process. 29173a608ca0SSimon Glass 29183a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 29193a608ca0SSimon Glass This is the number of available user bootstage records. 29203a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 29213a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 29223a608ca0SSimon Glass the limit, recording will stop. 29233a608ca0SSimon Glass 29243a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 29253a608ca0SSimon Glass Define this to print a report before boot, similar to this: 29263a608ca0SSimon Glass 29273a608ca0SSimon Glass Timer summary in microseconds: 29283a608ca0SSimon Glass Mark Elapsed Stage 29293a608ca0SSimon Glass 0 0 reset 29303a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 29313a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 29323a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 29333a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 29343a608ca0SSimon Glass 3,910,375 250,777 main_loop 29353a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 29363a608ca0SSimon Glass 30,361,327 445,160 start_kernel 29373a608ca0SSimon Glass 29382eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 29392eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 29402eba38cfSSimon Glass and un/stashing of bootstage data. 29412eba38cfSSimon Glass 294294fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 294394fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 294494fd1316SSimon Glass node is created with each bootstage id as a child. Each child 294594fd1316SSimon Glass has a 'name' property and either 'mark' containing the 294694fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 294794fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 294894fd1316SSimon Glass For example: 294994fd1316SSimon Glass 295094fd1316SSimon Glass bootstage { 295194fd1316SSimon Glass 154 { 295294fd1316SSimon Glass name = "board_init_f"; 295394fd1316SSimon Glass mark = <3575678>; 295494fd1316SSimon Glass }; 295594fd1316SSimon Glass 170 { 295694fd1316SSimon Glass name = "lcd"; 295794fd1316SSimon Glass accum = <33482>; 295894fd1316SSimon Glass }; 295994fd1316SSimon Glass }; 296094fd1316SSimon Glass 296194fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 296294fd1316SSimon Glass 29631372cce2SMarian BalakowiczLegacy uImage format: 29641372cce2SMarian Balakowicz 2965c609719bSwdenk Arg Where When 2966c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2967c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2968c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2969c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2970c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2971c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2972c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2973c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2974c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 29751372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2976c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2977c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2978c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2979c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 29801372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2981c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 29821372cce2SMarian Balakowicz 29831372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 29841372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 29851372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 29861372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 29871372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 29881372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 29891372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 299011ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 29911372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 29921372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 29931372cce2SMarian Balakowicz 2994ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2995c609719bSwdenk 2996a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 299763e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 299863e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 299963e73c9aSwdenk 3000566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3001566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3002566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3003566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3004566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3005566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3006566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3007566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3008566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3009566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3010566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3011566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3012566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3013566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3014566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3015566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3016566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3017566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3018566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3019566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3020566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3021566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3022566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3023566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3024566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3025566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3026566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3027566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3028566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3029566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3030566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3031566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3032566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3033566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3034566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3035566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3036566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3037566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3038566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3039566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3040566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3041566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3042566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3043566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3044566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3045566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3046566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3047c609719bSwdenk 3048566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3049c609719bSwdenk 3050566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3051566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3052566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3053206c60cbSwdenk 3054566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3055566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 305611ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3057566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3058566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3059566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 306074de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 306174de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3062566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3063c609719bSwdenk 30641372cce2SMarian BalakowiczFIT uImage format: 30651372cce2SMarian Balakowicz 30661372cce2SMarian Balakowicz Arg Where When 30671372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 30681372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 30691372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 30701372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 30711372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 30721372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3073f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 30741372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 30751372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 30761372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 30771372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 30781372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 307911ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 308011ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 30811372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 30821372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 30831372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 30841372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 30851372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 30861372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 30871372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 30881372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 30891372cce2SMarian Balakowicz 30901372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 30911372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 30921372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 309311ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 30941372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 30951372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 30961372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 30971372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 30981372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 30991372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 31001372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 31011372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 31021372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 31031372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 31041372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 31051372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 31061372cce2SMarian Balakowicz 310711ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 31081372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 31091372cce2SMarian Balakowicz 311011ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 31111372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 31121372cce2SMarian Balakowicz 311311ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 31141372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 31151372cce2SMarian Balakowicz 3116d95f6ec7SGabe Black- FIT image support: 3117d95f6ec7SGabe Black CONFIG_FIT 3118d95f6ec7SGabe Black Enable support for the FIT uImage format. 3119d95f6ec7SGabe Black 3120d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3121d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3122d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3123d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3124d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3125d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3126d95f6ec7SGabe Black 31273e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 31283e569a6bSSimon Glass This option enables signature verification of FIT uImages, 31293e569a6bSSimon Glass using a hash signed and verified using RSA. See 31303e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 31313e569a6bSSimon Glass 31324cf2609bSWolfgang Denk- Standalone program support: 31334cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 31344cf2609bSWolfgang Denk 31356feff899SWolfgang Denk This option defines a board specific value for the 31366feff899SWolfgang Denk address where standalone program gets loaded, thus 31376feff899SWolfgang Denk overwriting the architecture dependent default 31384cf2609bSWolfgang Denk settings. 31394cf2609bSWolfgang Denk 31404cf2609bSWolfgang Denk- Frame Buffer Address: 31414cf2609bSWolfgang Denk CONFIG_FB_ADDR 31424cf2609bSWolfgang Denk 31434cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 314444a53b57SWolfgang Denk address for frame buffer. This is typically the case 314544a53b57SWolfgang Denk when using a graphics controller has separate video 314644a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 314744a53b57SWolfgang Denk the given address instead of dynamically reserving it 314844a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 314944a53b57SWolfgang Denk the memory for the frame buffer depending on the 315044a53b57SWolfgang Denk configured panel size. 31514cf2609bSWolfgang Denk 31524cf2609bSWolfgang Denk Please see board_init_f function. 31534cf2609bSWolfgang Denk 3154cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3155cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3156cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3157cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3158cccfc2abSDetlev Zundel 3159cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3160cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3161cccfc2abSDetlev Zundel 3162cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3163cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3164cccfc2abSDetlev Zundel 3165cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3166cccfc2abSDetlev Zundel Needed for mtdparts command support. 3167cccfc2abSDetlev Zundel 3168cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3169cccfc2abSDetlev Zundel 3170cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3171cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3172cccfc2abSDetlev Zundel 317370c219cdSJoe Hershberger- UBI support 317470c219cdSJoe Hershberger CONFIG_CMD_UBI 317570c219cdSJoe Hershberger 317670c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 317770c219cdSJoe Hershberger with the UBI flash translation layer 317870c219cdSJoe Hershberger 317970c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 318070c219cdSJoe Hershberger 3181147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3182147162daSJoe Hershberger 3183147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3184147162daSJoe Hershberger warnings and errors enabled. 3185147162daSJoe Hershberger 318670c219cdSJoe Hershberger- UBIFS support 318770c219cdSJoe Hershberger CONFIG_CMD_UBIFS 318870c219cdSJoe Hershberger 318970c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 319070c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 319170c219cdSJoe Hershberger 319270c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 319370c219cdSJoe Hershberger 3194147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3195147162daSJoe Hershberger 3196147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3197147162daSJoe Hershberger warnings and errors enabled. 3198147162daSJoe Hershberger 31996a11cf48SDaniel Schwierzeck- SPL framework 32006a11cf48SDaniel Schwierzeck CONFIG_SPL 32016a11cf48SDaniel Schwierzeck Enable building of SPL globally. 32026a11cf48SDaniel Schwierzeck 320395579793STom Rini CONFIG_SPL_LDSCRIPT 320495579793STom Rini LDSCRIPT for linking the SPL binary. 320595579793STom Rini 32066ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 32076ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 32086ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 32096ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 32108960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32116ebc3461SAlbert ARIBAUD must not be both defined at the same time. 32126ebc3461SAlbert ARIBAUD 321395579793STom Rini CONFIG_SPL_MAX_SIZE 32146ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 32156ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 32166ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 32176ebc3461SAlbert ARIBAUD not exceed it. 321895579793STom Rini 32196a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 32206a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 32216a11cf48SDaniel Schwierzeck 322294a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 322394a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 322494a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 322594a45bb1SScott Wood 322695579793STom Rini CONFIG_SPL_BSS_START_ADDR 322795579793STom Rini Link address for the BSS within the SPL binary. 322895579793STom Rini 322995579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 32306ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 32316ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 32326ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 32338960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32346ebc3461SAlbert ARIBAUD must not be both defined at the same time. 323595579793STom Rini 323695579793STom Rini CONFIG_SPL_STACK 323795579793STom Rini Adress of the start of the stack SPL will use 323895579793STom Rini 323994a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 324094a45bb1SScott Wood Adress of the start of the stack SPL will use after 324194a45bb1SScott Wood relocation. If unspecified, this is equal to 324294a45bb1SScott Wood CONFIG_SPL_STACK. 324394a45bb1SScott Wood 324495579793STom Rini CONFIG_SYS_SPL_MALLOC_START 324595579793STom Rini Starting address of the malloc pool used in SPL. 324695579793STom Rini 324795579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 324895579793STom Rini The size of the malloc pool used in SPL. 32496a11cf48SDaniel Schwierzeck 325047f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 325147f7bcaeSTom Rini Enable the SPL framework under common/. This framework 325247f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 325347f7bcaeSTom Rini NAND loading of the Linux Kernel. 325447f7bcaeSTom Rini 3255861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3256861a86f4STom Rini For ARM, enable an optional function to print more information 3257861a86f4STom Rini about the running system. 3258861a86f4STom Rini 32594b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 32604b919725SScott Wood Arch init code should be built for a very small image 32614b919725SScott Wood 32626a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 32636a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 32646a11cf48SDaniel Schwierzeck 32656a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 32666a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 32676a11cf48SDaniel Schwierzeck 32686a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 32696a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 32706a11cf48SDaniel Schwierzeck 32716a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 32726a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 32736a11cf48SDaniel Schwierzeck 32746a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 32756a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 32766a11cf48SDaniel Schwierzeck 327795579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 327895579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 327995579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 328095579793STom Rini Address, size and partition on the MMC to load U-Boot from 328195579793STom Rini when the MMC is being used in raw mode. 328295579793STom Rini 32832b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 32842b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 32852b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 32862b75b0adSPeter Korsgaard 32872b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 32882b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 32892b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 32902b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 32912b75b0adSPeter Korsgaard (for falcon mode) 32922b75b0adSPeter Korsgaard 329395579793STom Rini CONFIG_SPL_FAT_SUPPORT 329495579793STom Rini Support for fs/fat/libfat.o in SPL binary 329595579793STom Rini 329695579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 329795579793STom Rini Filename to read to load U-Boot when reading from FAT 329895579793STom Rini 32997ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 33007ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 33017ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 33027ad2cc79SPeter Korsgaard 33037ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 33047ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 33057ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 33067ad2cc79SPeter Korsgaard 330706f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 330806f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 330906f60ae3SScott Wood start.S waits for the rest of the SPL to load before 331006f60ae3SScott Wood continuing (the hardware starts execution after just 331106f60ae3SScott Wood loading the first page rather than the full 4K). 331206f60ae3SScott Wood 33136f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 33146f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 33156f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 33166f2f01b9SScott Wood 33176f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 33186f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 33196f2f01b9SScott Wood 33206f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 33216f2f01b9SScott Wood Include standard software ECC in the SPL 33226f2f01b9SScott Wood 332395579793STom Rini CONFIG_SPL_NAND_SIMPLE 33247d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 33257d4b7955SScott Wood expose the cmd_ctrl() interface. 332695579793STom Rini 3327bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3328bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 33295614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3330bb0dc108SYing Zhang 33317c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 33327c8eea59SYing Zhang Set for common ddr init with serial presence detect in 33337c8eea59SYing Zhang SPL binary. 33347c8eea59SYing Zhang 333595579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 333695579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 333795579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 333895579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 333995579793STom Rini CONFIG_SYS_NAND_ECCBYTES 334095579793STom Rini Defines the size and behavior of the NAND that SPL uses 33417d4b7955SScott Wood to read U-Boot 334295579793STom Rini 3343fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3344fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3345fbe76ae4SPrabhakar Kushwaha 334695579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 33477d4b7955SScott Wood Location in NAND to read U-Boot from 33487d4b7955SScott Wood 33497d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 33507d4b7955SScott Wood Location in memory to load U-Boot to 33517d4b7955SScott Wood 33527d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 33537d4b7955SScott Wood Size of image to load 335495579793STom Rini 335595579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 33567d4b7955SScott Wood Entry point in loaded image to jump to 335795579793STom Rini 335895579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 335995579793STom Rini Define this if you need to first read the OOB and then the 336095579793STom Rini data. This is used for example on davinci plattforms. 336195579793STom Rini 336295579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 336395579793STom Rini Support for an OMAP3-specific set of functions to return the 336495579793STom Rini ID and MFR of the first attached NAND chip, if present. 336595579793STom Rini 33666a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 33676a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 33686a11cf48SDaniel Schwierzeck 33696a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 33706a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 33716a11cf48SDaniel Schwierzeck 33726a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 33736a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 33746a11cf48SDaniel Schwierzeck 3375c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3376c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3377c57b953dSPavel Machek 33786a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 33796a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 33801372cce2SMarian Balakowicz 3381ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3382ba1bee43SYing Zhang Support for the environment operating in SPL binary 3383ba1bee43SYing Zhang 3384ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3385ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3386ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3387ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3388ba1bee43SYing Zhang 338974752baaSScott Wood CONFIG_SPL_PAD_TO 33906113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 33916113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 33926113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 33936113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 33946113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 339574752baaSScott Wood 3396ca2fca22SScott Wood CONFIG_SPL_TARGET 3397ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3398ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3399ca2fca22SScott Wood example if more than one image needs to be produced. 3400ca2fca22SScott Wood 340187ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 340287ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 340387ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 340487ebee39SSimon Glass option to re-enable it. This will affect the output of the 340587ebee39SSimon Glass bootm command when booting a FIT image. 340687ebee39SSimon Glass 34073aa29de0SYing Zhang- TPL framework 34083aa29de0SYing Zhang CONFIG_TPL 34093aa29de0SYing Zhang Enable building of TPL globally. 34103aa29de0SYing Zhang 34113aa29de0SYing Zhang CONFIG_TPL_PAD_TO 34123aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 34133aa29de0SYing Zhang the TPL payload. By default, this is defined as 34143aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34153aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34163aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 34173aa29de0SYing Zhang 3418c609719bSwdenkModem Support: 3419c609719bSwdenk-------------- 3420c609719bSwdenk 3421566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3422c609719bSwdenk 342311ccc33fSMarcel Ziswiler- Modem support enable: 3424c609719bSwdenk CONFIG_MODEM_SUPPORT 3425c609719bSwdenk 3426c609719bSwdenk- RTS/CTS Flow control enable: 3427c609719bSwdenk CONFIG_HWFLOW 3428c609719bSwdenk 3429c609719bSwdenk- Modem debug support: 3430c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3431c609719bSwdenk 3432c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3433c609719bSwdenk for modem support. Useful only with BDI2000. 3434c609719bSwdenk 3435a8c7c708Swdenk- Interrupt support (PPC): 3436a8c7c708Swdenk 3437a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3438a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 343911ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3440a8c7c708Swdenk should set decrementer_count to appropriate value. If 344111ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3442a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 344311ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3444a8c7c708Swdenk specific handling. If board has watchdog / status_led 3445a8c7c708Swdenk / other_activity_monitor it works automatically from 3446a8c7c708Swdenk general timer_interrupt(). 3447a8c7c708Swdenk 3448c609719bSwdenk- General: 3449c609719bSwdenk 3450c609719bSwdenk In the target system modem support is enabled when a 3451c609719bSwdenk specific key (key combination) is pressed during 3452c609719bSwdenk power-on. Otherwise U-Boot will boot normally 345311ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3454c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3455c609719bSwdenk function, returning 1 and thus enabling modem 3456c609719bSwdenk initialization. 3457c609719bSwdenk 3458c609719bSwdenk If there are no modem init strings in the 3459c609719bSwdenk environment, U-Boot proceed to autoboot; the 3460c609719bSwdenk previous output (banner, info printfs) will be 346111ccc33fSMarcel Ziswiler suppressed, though. 3462c609719bSwdenk 3463c609719bSwdenk See also: doc/README.Modem 3464c609719bSwdenk 34659660e442SHelmut RaigerBoard initialization settings: 34669660e442SHelmut Raiger------------------------------ 34679660e442SHelmut Raiger 34689660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 34699660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 34709660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 34719660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 34729660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 34739660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 34749660e442SHelmut Raiger 34759660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 34769660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 34779660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 34789660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3479c609719bSwdenk 3480c609719bSwdenkConfiguration Settings: 3481c609719bSwdenk----------------------- 3482c609719bSwdenk 34834d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 34844d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 34854d1fd7f1SYork Sun 34866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3487c609719bSwdenk undefine this when you're short of memory. 3488c609719bSwdenk 34892fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 34902fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 34912fb2604dSPeter Tyser 34926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3493c609719bSwdenk prompt for user input. 3494c609719bSwdenk 34956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3496c609719bSwdenk 34976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3498c609719bSwdenk 34996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3500c609719bSwdenk 35016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3502c609719bSwdenk the application (usually a Linux kernel) when it is 3503c609719bSwdenk booted 3504c609719bSwdenk 35056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3506c609719bSwdenk List of legal baudrate settings for this board. 3507c609719bSwdenk 35086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3509c609719bSwdenk Suppress display of console information at boot. 3510c609719bSwdenk 35116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3512c609719bSwdenk If the board specific function 3513c609719bSwdenk extern int overwrite_console (void); 3514c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3515c609719bSwdenk serial port, else the settings in the environment are used. 3516c609719bSwdenk 35176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3518c609719bSwdenk Enable the call to overwrite_console(). 3519c609719bSwdenk 35206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3521c609719bSwdenk Enable overwrite of previous console environment settings. 3522c609719bSwdenk 35236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3524c609719bSwdenk Begin and End addresses of the area used by the 3525c609719bSwdenk simple memory test. 3526c609719bSwdenk 35276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3528c609719bSwdenk Enable an alternate, more extensive memory test. 3529c609719bSwdenk 35306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 35315f535fe1Swdenk Scratch address used by the alternate memory test 35325f535fe1Swdenk You only need to set this if address zero isn't writeable 35335f535fe1Swdenk 35346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 35356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 353614f73ca6SStefan Roese this specified memory area will get subtracted from the top 353711ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 353814f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 353914f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 354014f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 35415e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 354214f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 35435e12e75dSStefan Roese will have to get fixed in Linux additionally. 354414f73ca6SStefan Roese 354514f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 354614f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 354714f73ca6SStefan Roese be touched. 354814f73ca6SStefan Roese 354914f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 355014f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 355114f73ca6SStefan Roese then the end address of the Linux memory will be located at a 355214f73ca6SStefan Roese non page size aligned address and this could cause major 355314f73ca6SStefan Roese problems. 355414f73ca6SStefan Roese 35556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3556c609719bSwdenk Enable temporary baudrate change while serial download 3557c609719bSwdenk 35586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3559c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3560c609719bSwdenk 35616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3562c609719bSwdenk Physical start address of Motherboard I/O (if using a 3563c609719bSwdenk Cogent motherboard) 3564c609719bSwdenk 35656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3566c609719bSwdenk Physical start address of Flash memory. 3567c609719bSwdenk 35686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3569c609719bSwdenk Physical start address of boot monitor code (set by 3570c609719bSwdenk make config files to be same as the text base address 357114d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 35726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3573c609719bSwdenk 35746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 35753b57fe0aSwdenk Size of memory reserved for monitor code, used to 35763b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 35773b57fe0aSwdenk embedded within the U-Boot image, or in a separate 35783b57fe0aSwdenk flash sector. 3579c609719bSwdenk 35806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3581c609719bSwdenk Size of DRAM reserved for malloc() use. 3582c609719bSwdenk 35836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 358415940c9aSStefan Roese Normally compressed uImages are limited to an 358515940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 35866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 358715940c9aSStefan Roese to adjust this setting to your needs. 3588c609719bSwdenk 35896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3590c609719bSwdenk Maximum size of memory mapped by the startup code of 3591c609719bSwdenk the Linux kernel; all data that must be processed by 35927d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 35937d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 35941bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 35957d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3596c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3597c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3598c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3599c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3600c609719bSwdenk 3601fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3602fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3603fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3604fca43cc8SJohn Rigby is enabled. 3605fca43cc8SJohn Rigby 3606fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3607fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3608fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3609fca43cc8SJohn Rigby 3610fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3611fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3612fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3613fca43cc8SJohn Rigby 36146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3615c609719bSwdenk Max number of Flash memory banks 3616c609719bSwdenk 36176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3618c609719bSwdenk Max number of sectors on a Flash chip 3619c609719bSwdenk 36206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3621c609719bSwdenk Timeout for Flash erase operations (in ms) 3622c609719bSwdenk 36236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3624c609719bSwdenk Timeout for Flash write operations (in ms) 3625c609719bSwdenk 36266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 36278564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 36288564acf9Swdenk 36296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 36308564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 36318564acf9Swdenk 36326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 36338564acf9Swdenk If defined, hardware flash sectors protection is used 36348564acf9Swdenk instead of U-Boot software protection. 36358564acf9Swdenk 36366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3637c609719bSwdenk 3638c609719bSwdenk Enable TFTP transfers directly to flash memory; 3639c609719bSwdenk without this option such a download has to be 3640c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3641c609719bSwdenk copy from RAM to flash. 3642c609719bSwdenk 3643c609719bSwdenk The two-step approach is usually more reliable, since 3644c609719bSwdenk you can check if the download worked before you erase 364511ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 364611ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3647c609719bSwdenk downloaded image) this option may be very useful. 3648c609719bSwdenk 36496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3650c609719bSwdenk Define if the flash driver uses extra elements in the 36515653fc33Swdenk common flash structure for storing flash geometry. 36525653fc33Swdenk 365300b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 36545653fc33Swdenk This option also enables the building of the cfi_flash driver 36555653fc33Swdenk in the drivers directory 365653cf9435Sstroese 365791809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 365891809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 365991809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 366091809ed5SPiotr Ziecik to the MTD layer. 366191809ed5SPiotr Ziecik 36626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 366396ef831fSGuennadi Liakhovetski Use buffered writes to flash. 366496ef831fSGuennadi Liakhovetski 366596ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 366696ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 366796ef831fSGuennadi Liakhovetski write commands. 366896ef831fSGuennadi Liakhovetski 36696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 36705568e613SStefan Roese If this option is defined, the common CFI flash doesn't 36715568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 36725568e613SStefan Roese is useful, if some of the configured banks are only 36735568e613SStefan Roese optionally available. 36745568e613SStefan Roese 36759a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 36769a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 36779a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 36789a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 36799a042e9cSJerry Van Baren 3680352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3681352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3682352ef3f1SStefan Roese against the source after the write operation. An error message 3683352ef3f1SStefan Roese will be printed when the contents are not identical. 3684352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3685352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3686352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3687352ef3f1SStefan Roese this option if you really know what you are doing. 3688352ef3f1SStefan Roese 36896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 369011ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 369111ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 369253cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 369353cf9435Sstroese buffers can be full shortly after enabling the interface 369411ccc33fSMarcel Ziswiler on high Ethernet traffic. 369553cf9435Sstroese Defaults to 4 if not defined. 3696c609719bSwdenk 3697ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3698ea882bafSWolfgang Denk 3699ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3700ea882bafSWolfgang Denk internally to store the environment settings. The default 3701ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3702ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3703ea882bafSWolfgang Denk lib/hashtable.c for details. 3704ea882bafSWolfgang Denk 37052598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 37062598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 37071bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 37082598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 37092598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 37102598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 37112598090bSJoe Hershberger 37122598090bSJoe Hershberger The format of the list is: 37132598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3714267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3715267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 37162598090bSJoe Hershberger entry = variable_name[:attributes] 37172598090bSJoe Hershberger list = entry[,list] 37182598090bSJoe Hershberger 37192598090bSJoe Hershberger The type attributes are: 37202598090bSJoe Hershberger s - String (default) 37212598090bSJoe Hershberger d - Decimal 37222598090bSJoe Hershberger x - Hexadecimal 37232598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 37242598090bSJoe Hershberger i - IP address 37252598090bSJoe Hershberger m - MAC address 37262598090bSJoe Hershberger 3727267541f7SJoe Hershberger The access attributes are: 3728267541f7SJoe Hershberger a - Any (default) 3729267541f7SJoe Hershberger r - Read-only 3730267541f7SJoe Hershberger o - Write-once 3731267541f7SJoe Hershberger c - Change-default 3732267541f7SJoe Hershberger 37332598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 37342598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 37352598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 37362598090bSJoe Hershberger 37372598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 37382598090bSJoe Hershberger Define this to a list (string) to define validation that 37392598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 37402598090bSJoe Hershberger environment variable. To override a setting in the static 37412598090bSJoe Hershberger list, simply add an entry for the same variable name to the 37422598090bSJoe Hershberger ".flags" variable. 37432598090bSJoe Hershberger 3744267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3745267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3746267541f7SJoe Hershberger access flags. 3747267541f7SJoe Hershberger 37485c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 37495c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 37505c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 37515c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 37525c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 37535c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 37545c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 37555c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 37565c1a7ea6SSimon Glass your board please report the problem and send patches! 37575c1a7ea6SSimon Glass 37580b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 37590b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 37600b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 37610b1b60c7SLokesh Vutla the value can be calulated on a given board. 3762632efa74SSimon Glass 3763c609719bSwdenkThe following definitions that deal with the placement and management 3764c609719bSwdenkof environment data (variable area); in general, we support the 3765c609719bSwdenkfollowing configurations: 3766c609719bSwdenk 3767c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3768c3eb3fe4SMike Frysinger 3769c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3770c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3771c3eb3fe4SMike Frysinger 37725a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3773c609719bSwdenk 3774c609719bSwdenk Define this if the environment is in flash memory. 3775c609719bSwdenk 3776c609719bSwdenk a) The environment occupies one whole flash sector, which is 3777c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3778c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3779c609719bSwdenk sector" type flash chips, which have several smaller 3780c609719bSwdenk sectors at the start or the end. For instance, such a 3781c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3782c609719bSwdenk such a case you would place the environment in one of the 3783c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3784c609719bSwdenk "top boot sector" type flash chips, you would put the 3785c609719bSwdenk environment in one of the last sectors, leaving a gap 3786c609719bSwdenk between U-Boot and the environment. 3787c609719bSwdenk 37880e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3789c609719bSwdenk 3790c609719bSwdenk Offset of environment data (variable area) to the 3791c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3792c609719bSwdenk type flash chips the second sector can be used: the offset 3793c609719bSwdenk for this sector is given here. 3794c609719bSwdenk 37956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3796c609719bSwdenk 37970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3798c609719bSwdenk 3799c609719bSwdenk This is just another way to specify the start address of 3800c609719bSwdenk the flash sector containing the environment (instead of 38010e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3802c609719bSwdenk 38030e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3804c609719bSwdenk 3805c609719bSwdenk Size of the sector containing the environment. 3806c609719bSwdenk 3807c609719bSwdenk 3808c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3809c609719bSwdenk In such a case you don't want to spend a whole sector for 3810c609719bSwdenk the environment. 3811c609719bSwdenk 38120e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3813c609719bSwdenk 38145a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 38150e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3816c609719bSwdenk of this flash sector for the environment. This saves 3817c609719bSwdenk memory for the RAM copy of the environment. 3818c609719bSwdenk 3819c609719bSwdenk It may also save flash memory if you decide to use this 3820c609719bSwdenk when your environment is "embedded" within U-Boot code, 3821c609719bSwdenk since then the remainder of the flash sector could be used 3822c609719bSwdenk for U-Boot code. It should be pointed out that this is 3823c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3824c609719bSwdenk updating the environment in flash makes it always 3825c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3826c609719bSwdenk wrong before the contents has been restored from a copy in 3827c609719bSwdenk RAM, your target system will be dead. 3828c609719bSwdenk 38290e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 38300e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3831c609719bSwdenk 3832c609719bSwdenk These settings describe a second storage area used to hold 383311ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 38343e38691eSwdenk a valid backup copy in case there is a power failure during 3835c609719bSwdenk a "saveenv" operation. 3836c609719bSwdenk 3837c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3838c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3839c609719bSwdenkaccordingly! 3840c609719bSwdenk 3841c609719bSwdenk 38429314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3843c609719bSwdenk 3844c609719bSwdenk Define this if you have some non-volatile memory device 3845c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3846c609719bSwdenk environment. 3847c609719bSwdenk 38480e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 38490e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3850c609719bSwdenk 385111ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3852c609719bSwdenk want to use for environment. It is assumed that this memory 3853c609719bSwdenk can just be read and written to, without any special 3854c609719bSwdenk provision. 3855c609719bSwdenk 3856c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3857c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 385811ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3859c609719bSwdenkU-Boot will hang. 3860c609719bSwdenk 3861c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3862c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3863c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3864c609719bSwdenkto save the current settings. 3865c609719bSwdenk 3866c609719bSwdenk 3867bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3868c609719bSwdenk 3869c609719bSwdenk Use this if you have an EEPROM or similar serial access 3870c609719bSwdenk device and a driver for it. 3871c609719bSwdenk 38720e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 38730e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3874c609719bSwdenk 3875c609719bSwdenk These two #defines specify the offset and size of the 3876c609719bSwdenk environment area within the total memory of your EEPROM. 3877c609719bSwdenk 38786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3879c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3880c609719bSwdenk The default address is zero. 3881c609719bSwdenk 38826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3883c609719bSwdenk If defined, the number of bits used to address bytes in a 3884c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3885c609719bSwdenk would require six bits. 3886c609719bSwdenk 38876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3888c609719bSwdenk If defined, the number of milliseconds to delay between 3889c609719bSwdenk page writes. The default is zero milliseconds. 3890c609719bSwdenk 38916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3892c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3893c609719bSwdenk that this is NOT the chip address length! 3894c609719bSwdenk 38956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 38965cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 38975cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 38985cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 38995cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 39005cf91d6bSwdenk byte chips. 39015cf91d6bSwdenk 39025cf91d6bSwdenk Note that we consider the length of the address field to 39035cf91d6bSwdenk still be one byte because the extra address bits are hidden 39045cf91d6bSwdenk in the chip address. 39055cf91d6bSwdenk 39066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3907c609719bSwdenk The size in bytes of the EEPROM device. 3908c609719bSwdenk 3909548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3910548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3911548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3912548738b4SHeiko Schocher 3913548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3914548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3915548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3916548738b4SHeiko Schocher EEPROM. For example: 3917548738b4SHeiko Schocher 3918ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3919548738b4SHeiko Schocher 3920548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3921548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3922c609719bSwdenk 3923057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 39245779d8d9Swdenk 39255779d8d9Swdenk Define this if you have a DataFlash memory device which you 39265779d8d9Swdenk want to use for the environment. 39275779d8d9Swdenk 39280e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39290e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39300e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 39315779d8d9Swdenk 39325779d8d9Swdenk These three #defines specify the offset and size of the 39335779d8d9Swdenk environment area within the total memory of your DataFlash placed 39345779d8d9Swdenk at the specified address. 39355779d8d9Swdenk 39360a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 39370a85a9e7SLiu Gang 39380a85a9e7SLiu Gang Define this if you have a remote memory space which you 39390a85a9e7SLiu Gang want to use for the local device's environment. 39400a85a9e7SLiu Gang 39410a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 39420a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 39430a85a9e7SLiu Gang 39440a85a9e7SLiu Gang These two #defines specify the address and size of the 39450a85a9e7SLiu Gang environment area within the remote memory space. The 39460a85a9e7SLiu Gang local device can get the environment from remote memory 3947fc54c7faSLiu Gang space by SRIO or PCIE links. 39480a85a9e7SLiu Gang 39490a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 39500a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3951fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3952fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 39530a85a9e7SLiu Gang 395451bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 395513a5695bSwdenk 395613a5695bSwdenk Define this if you have a NAND device which you want to use 395713a5695bSwdenk for the environment. 395813a5695bSwdenk 39590e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 396113a5695bSwdenk 396213a5695bSwdenk These two #defines specify the offset and size of the environment 3963fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3964fdd813deSScott Wood aligned to an erase block boundary. 39655779d8d9Swdenk 3966fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3967e443c944SMarkus Klotzbuecher 39680e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3969fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3970fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3971fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3972fdd813deSScott Wood aligned to an erase block boundary. 3973e443c944SMarkus Klotzbuecher 3974fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3975fdd813deSScott Wood 3976fdd813deSScott Wood Specifies the length of the region in which the environment 3977fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3978fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3979fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3980fdd813deSScott Wood the range to be avoided. 3981fdd813deSScott Wood 3982fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3983fdd813deSScott Wood 3984fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3985fdd813deSScott Wood environment from block zero's out-of-band data. The 3986fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3987fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3988fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3989e443c944SMarkus Klotzbuecher 3990b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3991b74ab737SGuennadi Liakhovetski 3992b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3993b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3994b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3995b74ab737SGuennadi Liakhovetski 39962b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 39972b74433fSJoe Hershberger 39982b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 39992b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 40002b74433fSJoe Hershberger accesses, which is important on NAND. 40012b74433fSJoe Hershberger 40022b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 40032b74433fSJoe Hershberger 40042b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 40052b74433fSJoe Hershberger 40062b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 40072b74433fSJoe Hershberger 40082b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 40092b74433fSJoe Hershberger environment in. 40102b74433fSJoe Hershberger 4011785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4012785881f7SJoe Hershberger 4013785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4014785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4015785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4016785881f7SJoe Hershberger 40172b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 40182b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 40192b74433fSJoe Hershberger 40202b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 40212b74433fSJoe Hershberger when storing the env in UBI. 40222b74433fSJoe Hershberger 402306e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 402406e4ae5fSStephen Warren 402506e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 402606e4ae5fSStephen Warren environment. 402706e4ae5fSStephen Warren 402806e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 402906e4ae5fSStephen Warren 403006e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 403106e4ae5fSStephen Warren 403206e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 403306e4ae5fSStephen Warren 403406e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 403506e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 403606e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 403706e4ae5fSStephen Warren 403806e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 403906e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 404006e4ae5fSStephen Warren 404106e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 404206e4ae5fSStephen Warren area within the specified MMC device. 404306e4ae5fSStephen Warren 40445c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 40455c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 40465c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 40475c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 40485c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 40495c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 40505c088ee8SStephen Warren maximum possible space before it, to store other data. 40515c088ee8SStephen Warren 405206e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 405306e4ae5fSStephen Warren MMC sector boundary. 405406e4ae5fSStephen Warren 405506e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 405606e4ae5fSStephen Warren 405706e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 405806e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 405906e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 406006e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 406106e4ae5fSStephen Warren 40625c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 40635c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 40645c088ee8SStephen Warren 406506e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 406606e4ae5fSStephen Warren an MMC sector boundary. 406706e4ae5fSStephen Warren 406806e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 406906e4ae5fSStephen Warren 407006e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 407106e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 407206e4ae5fSStephen Warren CONFIG_ENV_SIZE. 407306e4ae5fSStephen Warren 40746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4075c609719bSwdenk 4076c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4077c609719bSwdenk area is used at an early stage (ROM part) if the environment 4078c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4079c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4080c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4081c609719bSwdenk to be a good choice since it makes it far enough from the 4082c609719bSwdenk start of the data area as well as from the stack pointer. 4083c609719bSwdenk 4084e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4085c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4086cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4087c609719bSwdenkuntil then to read environment variables. 4088c609719bSwdenk 408985ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 409085ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 409185ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 409285ec0bccSwdenknecessary, because the first environment variable we need is the 409385ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 409485ec0bccSwdenkhave any device yet where we could complain.] 4095c609719bSwdenk 4096c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4097c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 409885ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4099c609719bSwdenk 41006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4101fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4102fc3e2165Swdenk 41036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4104fc3e2165Swdenk also needs to be defined. 4105fc3e2165Swdenk 41066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4107fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4108c609719bSwdenk 4109f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4110f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4111f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4112f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4113f5675aa5SRon Madrid space for already greatly restricted images, including but not 4114f5675aa5SRon Madrid limited to NAND_SPL configurations. 4115f5675aa5SRon Madrid 4116b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4117b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4118b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4119b2b92f53SSimon Glass to do this. 4120b2b92f53SSimon Glass 4121e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4122e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4123e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4124e2e3e2b1SSimon Glass present. 4125e2e3e2b1SSimon Glass 4126c609719bSwdenkLow Level (hardware related) configuration options: 4127dc7c9a1aSwdenk--------------------------------------------------- 4128c609719bSwdenk 41296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4130c609719bSwdenk Cache Line Size of the CPU. 4131c609719bSwdenk 41326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4133c609719bSwdenk Default address of the IMMR after system reset. 41342535d602Swdenk 41352535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 41362535d602Swdenk and RPXsuper) to be able to adjust the position of 41372535d602Swdenk the IMMR register after a reset. 4138c609719bSwdenk 4139e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4140e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4141e46fedfeSTimur Tabi PowerPC SOCs. 4142e46fedfeSTimur Tabi 4143e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4144e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4145e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4146e46fedfeSTimur Tabi 4147e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4148e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4149e46fedfeSTimur Tabi 4150e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4151e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4152e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4153e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4154e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4155e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4156e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4157e46fedfeSTimur Tabi 4158e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4159e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4160e46fedfeSTimur Tabi 4161e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4162e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4163e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4164e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4165e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4166e46fedfeSTimur Tabi 4167e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4168e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4169e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4170e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4171e46fedfeSTimur Tabi 4172e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4173e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4174e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4175e46fedfeSTimur Tabi 41767f6c2cbcSwdenk- Floppy Disk Support: 41776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 41787f6c2cbcSwdenk 41797f6c2cbcSwdenk the default drive number (default value 0) 41807f6c2cbcSwdenk 41816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 41827f6c2cbcSwdenk 418311ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 41847f6c2cbcSwdenk (default value 1) 41857f6c2cbcSwdenk 41866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 41877f6c2cbcSwdenk 41887f6c2cbcSwdenk defines the offset of register from address. It 41897f6c2cbcSwdenk depends on which part of the data bus is connected to 419011ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 41917f6c2cbcSwdenk 41926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 41936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 41947f6c2cbcSwdenk default value. 41957f6c2cbcSwdenk 41966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 41977f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 41987f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 41997f6c2cbcSwdenk source code. It is used to make hardware dependant 42007f6c2cbcSwdenk initializations. 42017f6c2cbcSwdenk 42020abddf82SMacpaul Lin- CONFIG_IDE_AHB: 42030abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 42040abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 42050abddf82SMacpaul Lin When software is doing ATA command and data transfer to 42060abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 42070abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 42080abddf82SMacpaul Lin is requierd. 42090abddf82SMacpaul Lin 42106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 421125d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 421225d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4213c609719bSwdenk 42146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4215c609719bSwdenk 42167152b1d0Swdenk Start address of memory area that can be used for 4217c609719bSwdenk initial data and stack; please note that this must be 4218c609719bSwdenk writable memory that is working WITHOUT special 4219c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4220c609719bSwdenk will become available only after programming the 4221c609719bSwdenk memory controller and running certain initialization 4222c609719bSwdenk sequences. 4223c609719bSwdenk 4224c609719bSwdenk U-Boot uses the following memory types: 4225c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4226c609719bSwdenk - MPC824X: data cache 4227c609719bSwdenk - PPC4xx: data cache 4228c609719bSwdenk 42296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4230c609719bSwdenk 4231c609719bSwdenk Offset of the initial data structure in the memory 42326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 42336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4234c609719bSwdenk data is located at the end of the available space 4235553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 42366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 42376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 42386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4239c609719bSwdenk 4240c609719bSwdenk Note: 4241c609719bSwdenk On the MPC824X (or other systems that use the data 4242c609719bSwdenk cache for initial memory) the address chosen for 42436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4244c609719bSwdenk point to an otherwise UNUSED address space between 4245c609719bSwdenk the top of RAM and the start of the PCI space. 4246c609719bSwdenk 42476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4248c609719bSwdenk 42496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4250c609719bSwdenk 42516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4252c609719bSwdenk 42536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4254c609719bSwdenk 42556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4256c609719bSwdenk 42576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4258c609719bSwdenk 42596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4260c609719bSwdenk SDRAM timing 4261c609719bSwdenk 42626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4263c609719bSwdenk periodic timer for refresh 4264c609719bSwdenk 42656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4266c609719bSwdenk 42676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 42686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 42696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 42706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4271c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4272c609719bSwdenk 4273c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 42746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 42756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4276c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4277c609719bSwdenk 42786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 42796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4280c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4281c609719bSwdenk Prescaler definitions (SDRAM timing) 4282c609719bSwdenk 42836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4284c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4285c609719bSwdenk define relocation offset in DPRAM [DSP2] 4286c609719bSwdenk 42876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4288b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4289b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4290b423d055SHeiko Schocher 42916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4292c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4293c609719bSwdenk define relocation offset in DPRAM [SCC4] 4294c609719bSwdenk 42956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4296c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4297c609719bSwdenk wrong setting might damage your board. Read 4298c609719bSwdenk doc/README.MBX before setting this variable! 4299c609719bSwdenk 43006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4301ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4302ea909b76Swdenk (Power On Self Tests). This definition overrides 4303ea909b76Swdenk #define'd default value in commproc.h resp. 4304ea909b76Swdenk cpm_8260.h. 4305ea909b76Swdenk 43066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 43076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 43086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 43096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 43106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 43116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 43126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 43136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4314a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 43155d232d0eSwdenk 43169cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 43179cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 43189cacf4fcSDirk Eibach required. 43199cacf4fcSDirk Eibach 432069fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 432169fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 432269fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 432369fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 432469fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 432569fd2d3bSAndrew Sharp by coreboot or similar. 432669fd2d3bSAndrew Sharp 4327842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4328842033e6SGabor Juhos Enable support for indirect PCI bridges. 4329842033e6SGabor Juhos 4330a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4331a09b9b68SKumar Gala Chip has SRIO or not 4332a09b9b68SKumar Gala 4333a09b9b68SKumar Gala- CONFIG_SRIO1: 4334a09b9b68SKumar Gala Board has SRIO 1 port available 4335a09b9b68SKumar Gala 4336a09b9b68SKumar Gala- CONFIG_SRIO2: 4337a09b9b68SKumar Gala Board has SRIO 2 port available 4338a09b9b68SKumar Gala 4339c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4340c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4341c8b28152SLiu Gang 4342a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4343a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4344a09b9b68SKumar Gala 4345a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4346a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4347a09b9b68SKumar Gala 4348a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4349a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4350a09b9b68SKumar Gala 435166bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 435266bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 435366bd1846SFabio Estevam a 16 bit bus. 435466bd1846SFabio Estevam Not all NAND drivers use this symbol. 4355a430e916SFabio Estevam Example of drivers that use it: 435666bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4357a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4358eced4626SAlex Waterman 4359eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4360eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4361eced4626SAlex Waterman a default value will be used. 4362eced4626SAlex Waterman 4363bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4364218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4365218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4366218ca724SWolfgang Denk 4367bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4368bb99ad6dSBen Warren I2C address of the SPD EEPROM 4369bb99ad6dSBen Warren 43706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4371218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4372218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4373218ca724SWolfgang Denk to something your driver can deal with. 4374bb99ad6dSBen Warren 43751b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 43761b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 43771b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 43781b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 43791b3e3c4fSYork Sun header files or board specific files. 43801b3e3c4fSYork Sun 43816f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 43826f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 43836f5e1dc5SYork Sun 43846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4385218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4386218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 43872ad6b513STimur Tabi 4388c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4389c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4390c26e454dSwdenk 4391c26e454dSwdenk- CONFIG_FEC[12]_PHY 4392c26e454dSwdenk Define to the hardcoded PHY address which corresponds 43936e592385Swdenk to the given FEC; i. e. 4394c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4395c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4396c26e454dSwdenk 4397c26e454dSwdenk When set to -1, means to probe for first available. 4398c26e454dSwdenk 4399c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4400c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4401c26e454dSwdenk (so program the FEC to ignore it). 4402c26e454dSwdenk 4403c26e454dSwdenk- CONFIG_RMII 4404c26e454dSwdenk Enable RMII mode for all FECs. 4405c26e454dSwdenk Note that this is a global option, we can't 4406c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4407c26e454dSwdenk 44085cf91d6bSwdenk- CONFIG_CRC32_VERIFY 44095cf91d6bSwdenk Add a verify option to the crc32 command. 44105cf91d6bSwdenk The syntax is: 44115cf91d6bSwdenk 44125cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 44135cf91d6bSwdenk 44145cf91d6bSwdenk Where address/count indicate a memory area 44155cf91d6bSwdenk and crc32 is the correct crc32 which the 44165cf91d6bSwdenk area should have. 44175cf91d6bSwdenk 441856523f12Swdenk- CONFIG_LOOPW 441956523f12Swdenk Add the "loopw" memory command. This only takes effect if 4420602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 442156523f12Swdenk 44227b466641Sstroese- CONFIG_MX_CYCLIC 44237b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 44247b466641Sstroese "md/mw" commands. 44257b466641Sstroese Examples: 44267b466641Sstroese 44277b466641Sstroese => mdc.b 10 4 500 44287b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 44297b466641Sstroese 44307b466641Sstroese => mwc.l 100 12345678 10 44317b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 44327b466641Sstroese 44337b466641Sstroese This only takes effect if the memory commands are activated 4434602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 44357b466641Sstroese 44368aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4437afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4438e03f3169SWolfgang Denk low level initializations (like setting up the memory 4439e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4440e03f3169SWolfgang Denk relocate itself into RAM. 44418aa1a2d1Swdenk 4442e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4443e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4444e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4445e03f3169SWolfgang Denk these initializations itself. 44468aa1a2d1Swdenk 4447401bb30bSAneesh V- CONFIG_SPL_BUILD 4448df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4449df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4450df81238bSMagnus Lilja compiling a NAND SPL. 4451400558b5Swdenk 44523aa29de0SYing Zhang- CONFIG_TPL_BUILD 44533aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 44543aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 44553aa29de0SYing Zhang It is loaded by the SPL. 44563aa29de0SYing Zhang 44575df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 44585df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 44595df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 44605df572f0SYing Zhang previous 4k of the .text section. 44615df572f0SYing Zhang 44624213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 44634213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 44644213fc29SSimon Glass effective address. It is therefore not necessary to regard 44654213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 44664213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 44674213fc29SSimon Glass it maintains its own little RAM buffer which contains all 44684213fc29SSimon Glass addressable memory. This option causes some memory accesses 44694213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 44704213fc29SSimon Glass 4471d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4472d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4473d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4474d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4475d8834a13SMatthias Weisser conditions but may increase the binary size. 4476d8834a13SMatthias Weisser 4477588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4478588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4479588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4480b16f521aSGabe Black 4481fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4482fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4483fc33705eSMark Jackson 4484fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 44855b5ece9eSGabe Black 448616678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 448716678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 448816678eb4SHeiko Schocher 4489f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4490f2717b47STimur Tabi----------------------------------- 4491f2717b47STimur Tabi 4492f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4493f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4494f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4495f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4496f2717b47STimur Tabiwithin that device. 4497f2717b47STimur Tabi 4498f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 4499f2717b47STimur Tabi The address in the storage device where the firmware is located. The 4500f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4501f2717b47STimur Tabi is also specified. 4502f2717b47STimur Tabi 4503f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4504f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4505f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4506f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4507f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4508f2717b47STimur Tabi 4509f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4510f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4511f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4512f2717b47STimur Tabi virtual address in NOR flash. 4513f2717b47STimur Tabi 4514f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4515f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4516f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4517f2717b47STimur Tabi 4518f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4519f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4520f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4521f2717b47STimur Tabi 4522f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4523f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4524f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4525f2717b47STimur Tabi 4526292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4527292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4528292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4529fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4530fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4531fc54c7faSLiu Gang master's memory space. 4532f2717b47STimur Tabi 4533c609719bSwdenkBuilding the Software: 4534c609719bSwdenk====================== 4535c609719bSwdenk 4536218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4537218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4538218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4539218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4540218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4541218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4542c609719bSwdenk 4543218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4544218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4545218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4546218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4547218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4548c609719bSwdenk 4549218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4550218ca724SWolfgang Denk $ export CROSS_COMPILE 4551c609719bSwdenk 45522f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 45532f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 45542f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 45552f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 45562f8d396bSPeter Tyser 45572f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 45582f8d396bSPeter Tyser 45592f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 45602f8d396bSPeter Tyser be executed on computers running Windows. 45612f8d396bSPeter Tyser 4562c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4563c609719bSwdenksources you must configure U-Boot for one specific board type. This 4564c609719bSwdenkis done by typing: 4565c609719bSwdenk 4566c609719bSwdenk make NAME_config 4567c609719bSwdenk 4568218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 45694d675ae6SMichael Jonesrations; see boards.cfg for supported names. 457054387ac9Swdenk 4571c609719bSwdenkNote: for some board special configuration names may exist; check if 4572c609719bSwdenk additional information is available from the board vendor; for 45732729af9dSwdenk instance, the TQM823L systems are available without (standard) 45742729af9dSwdenk or with LCD support. You can select such additional "features" 457511ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4576c609719bSwdenk 45772729af9dSwdenk make TQM823L_config 45782729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4579c609719bSwdenk 4580c609719bSwdenk make TQM823L_LCD_config 4581c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4582c609719bSwdenk 4583c609719bSwdenk etc. 4584c609719bSwdenk 4585c609719bSwdenk 4586c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 45877152b1d0Swdenkimages ready for download to / installation on your system: 4588c609719bSwdenk 4589c609719bSwdenk- "u-boot.bin" is a raw binary image 4590c609719bSwdenk- "u-boot" is an image in ELF binary format 4591c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4592c609719bSwdenk 4593baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4594baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4595baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4596baf31249SMarian Balakowicz 4597baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4598baf31249SMarian Balakowicz 4599baf31249SMarian Balakowicz make O=/tmp/build distclean 4600baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4601baf31249SMarian Balakowicz make O=/tmp/build all 4602baf31249SMarian Balakowicz 4603baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4604baf31249SMarian Balakowicz 4605baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4606baf31249SMarian Balakowicz make distclean 4607baf31249SMarian Balakowicz make NAME_config 4608baf31249SMarian Balakowicz make all 4609baf31249SMarian Balakowicz 4610baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4611baf31249SMarian Balakowiczvariable. 4612baf31249SMarian Balakowicz 4613c609719bSwdenk 4614c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4615c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4616c609719bSwdenknative "make". 4617c609719bSwdenk 4618c609719bSwdenk 4619c609719bSwdenkIf the system board that you have is not listed, then you will need 4620c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4621c609719bSwdenksteps: 4622c609719bSwdenk 4623c609719bSwdenk1. Add a new configuration option for your board to the toplevel 46244d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 46254d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4626c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 462785ec0bccSwdenk files you need. In your board directory, you will need at least 462885ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 462985ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 463085ec0bccSwdenk your board 4631c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4632c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 463385ec0bccSwdenk4. Run "make <board>_config" with your new name. 4634c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4635c609719bSwdenk to be installed on your target system. 463685ec0bccSwdenk6. Debug and solve any problems that might arise. 4637c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4638c609719bSwdenk 4639c609719bSwdenk 4640c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4641c609719bSwdenk============================================================== 4642c609719bSwdenk 4643c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4644c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4645c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4646c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4647218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4648c609719bSwdenk 4649c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4650c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4651c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4652c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4653c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 46547152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4655218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4656218ca724SWolfgang Denkyou can type 4657c609719bSwdenk 4658c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4659c609719bSwdenk 4660c609719bSwdenkor to build on a native PowerPC system you can type 4661c609719bSwdenk 4662c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4663c609719bSwdenk 4664218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4665218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4666218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4667218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4668218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4669218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4670218ca724SWolfgang Denkvariable. For example: 4671baf31249SMarian Balakowicz 4672baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4673baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4674baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4675baf31249SMarian Balakowicz 4676218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4677218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4678218ca724SWolfgang Denkduring the whole build process. 4679baf31249SMarian Balakowicz 4680baf31249SMarian Balakowicz 4681c609719bSwdenkSee also "U-Boot Porting Guide" below. 4682c609719bSwdenk 4683c609719bSwdenk 4684c609719bSwdenkMonitor Commands - Overview: 4685c609719bSwdenk============================ 4686c609719bSwdenk 4687c609719bSwdenkgo - start application at address 'addr' 4688c609719bSwdenkrun - run commands in an environment variable 4689c609719bSwdenkbootm - boot application image from memory 4690c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 469144f074c7SMarek Vasutbootz - boot zImage from memory 4692c609719bSwdenktftpboot- boot image via network using TFTP protocol 4693c609719bSwdenk and env variables "ipaddr" and "serverip" 4694c609719bSwdenk (and eventually "gatewayip") 46951fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4696c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4697c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4698c609719bSwdenkloads - load S-Record file over serial line 4699c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4700c609719bSwdenkmd - memory display 4701c609719bSwdenkmm - memory modify (auto-incrementing) 4702c609719bSwdenknm - memory modify (constant address) 4703c609719bSwdenkmw - memory write (fill) 4704c609719bSwdenkcp - memory copy 4705c609719bSwdenkcmp - memory compare 4706c609719bSwdenkcrc32 - checksum calculation 47070f89c54bSPeter Tyseri2c - I2C sub-system 4708c609719bSwdenksspi - SPI utility commands 4709c609719bSwdenkbase - print or set address offset 4710c609719bSwdenkprintenv- print environment variables 4711c609719bSwdenksetenv - set environment variables 4712c609719bSwdenksaveenv - save environment variables to persistent storage 4713c609719bSwdenkprotect - enable or disable FLASH write protection 4714c609719bSwdenkerase - erase FLASH memory 4715c609719bSwdenkflinfo - print FLASH memory information 471610635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4717c609719bSwdenkbdinfo - print Board Info structure 4718c609719bSwdenkiminfo - print header information for application image 4719c609719bSwdenkconinfo - print console devices and informations 4720c609719bSwdenkide - IDE sub-system 4721c609719bSwdenkloop - infinite loop on address range 472256523f12Swdenkloopw - infinite write loop on address range 4723c609719bSwdenkmtest - simple RAM test 4724c609719bSwdenkicache - enable or disable instruction cache 4725c609719bSwdenkdcache - enable or disable data cache 4726c609719bSwdenkreset - Perform RESET of the CPU 4727c609719bSwdenkecho - echo args to console 4728c609719bSwdenkversion - print monitor version 4729c609719bSwdenkhelp - print online help 4730c609719bSwdenk? - alias for 'help' 4731c609719bSwdenk 4732c609719bSwdenk 4733c609719bSwdenkMonitor Commands - Detailed Description: 4734c609719bSwdenk======================================== 4735c609719bSwdenk 4736c609719bSwdenkTODO. 4737c609719bSwdenk 4738c609719bSwdenkFor now: just type "help <command>". 4739c609719bSwdenk 4740c609719bSwdenk 4741c609719bSwdenkEnvironment Variables: 4742c609719bSwdenk====================== 4743c609719bSwdenk 4744c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4745c609719bSwdenkcan be made persistent by saving to Flash memory. 4746c609719bSwdenk 4747c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4748c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4749c609719bSwdenkwithout a value can be used to delete a variable from the 4750c609719bSwdenkenvironment. As long as you don't save the environment you are 4751c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4752c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4753c609719bSwdenk 4754c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4755c96f86eeSWolfgang Denk 4756c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4757c609719bSwdenk 4758c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4759c609719bSwdenk 4760c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4761c609719bSwdenk 4762c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4763c609719bSwdenk 4764c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4765c609719bSwdenk 4766c609719bSwdenk bootfile - Name of the image to load with TFTP 4767c609719bSwdenk 47687d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 47697d721e34SBartlomiej Sieka command can be restricted. This variable is given as 47707d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 47717d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 47727d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 47737d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4774c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4775c3624e6eSGrant Likely bootm_mapsize. 4776c3624e6eSGrant Likely 4777c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4778c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4779c3624e6eSGrant Likely defines the size of the memory region starting at base 4780c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4781c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4782c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4783c3624e6eSGrant Likely used otherwise. 47847d721e34SBartlomiej Sieka 47857d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 47867d721e34SBartlomiej Sieka command can be restricted. This variable is given as 47877d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 47887d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 47897d721e34SBartlomiej Sieka environment variable. 47907d721e34SBartlomiej Sieka 47914bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 47924bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 47934bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 47944bae9090SBartlomiej Sieka 4795c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4796c609719bSwdenk "bootp" will just load perform a lookup of the 4797c609719bSwdenk configuration from the BOOTP server, but not try to 4798c609719bSwdenk load any image using TFTP 4799c609719bSwdenk 4800c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4801c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4802c609719bSwdenk be automatically started (by internally calling 4803c609719bSwdenk "bootm") 4804c609719bSwdenk 48054a6fd34bSwdenk If set to "no", a standalone image passed to the 48064a6fd34bSwdenk "bootm" command will be copied to the load address 48074a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 48084a6fd34bSwdenk This can be used to load and uncompress arbitrary 48094a6fd34bSwdenk data. 48104a6fd34bSwdenk 4811a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4812a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4813fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4814fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4815fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4816fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4817fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4818fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4819fa34f6b2SShawn Guo access it during the boot procedure. 4820fa34f6b2SShawn Guo 4821a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4822a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4823a28afca5SDavid A. Long to work it must reside in writable memory, have 4824a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4825a28afca5SDavid A. Long add the information it needs into it, and the memory 4826a28afca5SDavid A. Long must be accessible by the kernel. 4827a28afca5SDavid A. Long 4828eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4829eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4830eea63e05SSimon Glass defined. 4831eea63e05SSimon Glass 483217ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 483317ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 483417ea1177Swdenk mode (400kHZ). This environment variable is used in 483517ea1177Swdenk initialization code. So, for changes to be effective 483617ea1177Swdenk it must be saved and board must be reset. 483717ea1177Swdenk 4838c609719bSwdenk initrd_high - restrict positioning of initrd images: 4839c609719bSwdenk If this variable is not set, initrd images will be 4840c609719bSwdenk copied to the highest possible address in RAM; this 4841c609719bSwdenk is usually what you want since it allows for 4842c609719bSwdenk maximum initrd size. If for some reason you want to 4843c609719bSwdenk make sure that the initrd image is loaded below the 48446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4845c609719bSwdenk variable to a value of "no" or "off" or "0". 4846c609719bSwdenk Alternatively, you can set it to a maximum upper 4847c609719bSwdenk address to use (U-Boot will still check that it 4848c609719bSwdenk does not overwrite the U-Boot stack and data). 4849c609719bSwdenk 4850c609719bSwdenk For instance, when you have a system with 16 MB 48517152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4852c609719bSwdenk you can do this by adding "mem=12M" to the value of 4853c609719bSwdenk the "bootargs" variable. However, now you must make 48547152b1d0Swdenk sure that the initrd image is placed in the first 4855c609719bSwdenk 12 MB as well - this can be done with 4856c609719bSwdenk 4857c609719bSwdenk setenv initrd_high 00c00000 4858c609719bSwdenk 485938b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 486038b99261Swdenk indication to U-Boot that all addresses are legal 486138b99261Swdenk for the Linux kernel, including addresses in flash 486238b99261Swdenk memory. In this case U-Boot will NOT COPY the 486338b99261Swdenk ramdisk at all. This may be useful to reduce the 486438b99261Swdenk boot time on your system, but requires that this 486538b99261Swdenk feature is supported by your Linux kernel. 486638b99261Swdenk 4867c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4868c609719bSwdenk 4869c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4870dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4871c609719bSwdenk 4872c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4873c609719bSwdenk 4874c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4875c609719bSwdenk 4876c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4877c609719bSwdenk 4878c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4879c609719bSwdenk 4880c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4881c609719bSwdenk 4882e2a53458SMike Frysinger ethprime - controls which interface is used first. 4883a3d991bdSwdenk 4884e2a53458SMike Frysinger ethact - controls which interface is currently active. 4885e2a53458SMike Frysinger For example you can do the following 4886a3d991bdSwdenk 488748690d80SHeiko Schocher => setenv ethact FEC 488848690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 488948690d80SHeiko Schocher => setenv ethact SCC 489048690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4891a3d991bdSwdenk 4892e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4893e1692577SMatthias Fuchs available network interfaces. 4894e1692577SMatthias Fuchs It just stays at the currently selected interface. 4895e1692577SMatthias Fuchs 4896a3d991bdSwdenk netretry - When set to "no" each network operation will 4897a3d991bdSwdenk either succeed or fail without retrying. 48986e592385Swdenk When set to "once" the network operation will 48996e592385Swdenk fail when all the available network interfaces 49006e592385Swdenk are tried once without success. 4901a3d991bdSwdenk Useful on scripts which control the retry operation 4902a3d991bdSwdenk themselves. 4903a3d991bdSwdenk 4904b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4905a1cf027aSJean-Christophe PLAGNIOL-VILLARD 49068d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 49078d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 49088d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 49098d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 49108d51aacdSSimon Glass is silent. 49118d51aacdSSimon Glass 491228cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4913ecb0ccd9SWolfgang Denk UDP source port. 4914ecb0ccd9SWolfgang Denk 491528cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 491628cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 491728cb9375SWolfgang Denk 4918c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4919c96f86eeSWolfgang Denk we use the TFTP server's default block size 4920c96f86eeSWolfgang Denk 4921c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4922c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4923c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4924c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4925c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4926c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4927c96f86eeSWolfgang Denk with unreliable TFTP servers. 4928c96f86eeSWolfgang Denk 4929a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 493011ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4931a3d991bdSwdenk VLAN tagged frames. 4932c609719bSwdenk 4933dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4934dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4935dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4936dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4937dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4938dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4939dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4940dc0b7b0eSJason Hobbs 4941dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4942dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4943dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4944dc0b7b0eSJason Hobbs 4945dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4946dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4947dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4948dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4949dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4950dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4951dc0b7b0eSJason Hobbs 4952c609719bSwdenkThe following environment variables may be used and automatically 4953c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4954c609719bSwdenkdepending the information provided by your boot server: 4955c609719bSwdenk 4956c609719bSwdenk bootfile - see above 4957c609719bSwdenk dnsip - IP address of your Domain Name Server 4958fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4959c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4960c609719bSwdenk hostname - Target hostname 4961c609719bSwdenk ipaddr - see above 4962c609719bSwdenk netmask - Subnet Mask 4963c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4964c609719bSwdenk serverip - see above 4965c609719bSwdenk 4966c609719bSwdenk 4967c609719bSwdenkThere are two special Environment Variables: 4968c609719bSwdenk 4969c609719bSwdenk serial# - contains hardware identification information such 4970c609719bSwdenk as type string and/or serial number 4971c609719bSwdenk ethaddr - Ethernet address 4972c609719bSwdenk 4973c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4974c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4975c609719bSwdenkonce they have been set once. 4976c609719bSwdenk 4977c609719bSwdenk 4978c1551ea8SstroeseFurther special Environment Variables: 4979c1551ea8Sstroese 4980c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4981c1551ea8Sstroese with the "version" command. This variable is 4982c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4983c1551ea8Sstroese 4984c1551ea8Sstroese 4985c609719bSwdenkPlease note that changes to some configuration parameters may take 4986c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4987c609719bSwdenk 4988c609719bSwdenk 4989170ab110SJoe HershbergerCallback functions for environment variables: 4990170ab110SJoe Hershberger--------------------------------------------- 4991170ab110SJoe Hershberger 4992170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4993170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 4994170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4995170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4996170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4997170ab110SJoe Hershberger 4998170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4999170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5000170ab110SJoe Hershberger 5001170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5002170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5003170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5004170ab110SJoe Hershbergerassociations. The list must be in the following format: 5005170ab110SJoe Hershberger 5006170ab110SJoe Hershberger entry = variable_name[:callback_name] 5007170ab110SJoe Hershberger list = entry[,list] 5008170ab110SJoe Hershberger 5009170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5010170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5011170ab110SJoe Hershberger 5012170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5013170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5014170ab110SJoe Hershbergeroverride any association in the static list. You can define 5015170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5016170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5017170ab110SJoe Hershberger 5018170ab110SJoe Hershberger 5019f07771ccSwdenkCommand Line Parsing: 5020f07771ccSwdenk===================== 5021f07771ccSwdenk 5022f07771ccSwdenkThere are two different command line parsers available with U-Boot: 50237152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5024f07771ccSwdenk 5025f07771ccSwdenkOld, simple command line parser: 5026f07771ccSwdenk-------------------------------- 5027f07771ccSwdenk 5028f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5029f07771ccSwdenk- several commands on one line, separated by ';' 5030fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5031f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5032f07771ccSwdenk for example: 5033fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5034f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5035f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5036f07771ccSwdenk 5037f07771ccSwdenkHush shell: 5038f07771ccSwdenk----------- 5039f07771ccSwdenk 5040f07771ccSwdenk- similar to Bourne shell, with control structures like 5041f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5042f07771ccSwdenk until...do...done, ... 5043f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5044f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5045f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5046f07771ccSwdenk command 5047f07771ccSwdenk 5048f07771ccSwdenkGeneral rules: 5049f07771ccSwdenk-------------- 5050f07771ccSwdenk 5051f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5052f07771ccSwdenk command) contains several commands separated by semicolon, and 5053f07771ccSwdenk one of these commands fails, then the remaining commands will be 5054f07771ccSwdenk executed anyway. 5055f07771ccSwdenk 5056f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 505711ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5058f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5059f07771ccSwdenk variables are not executed. 5060f07771ccSwdenk 5061c609719bSwdenkNote for Redundant Ethernet Interfaces: 5062c609719bSwdenk======================================= 5063c609719bSwdenk 506411ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5065c609719bSwdenksuch configurations and is capable of automatic selection of a 50667152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5067c609719bSwdenk 5068c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5069c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5070c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5071c609719bSwdenk 5072c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5073c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5074c609719bSwdenkding setting in the environment; if the corresponding environment 5075c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5076c609719bSwdenk 5077c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5078c609719bSwdenk environment, the SROM's address is used. 5079c609719bSwdenk 5080c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5081c609719bSwdenk environment exists, then the value from the environment variable is 5082c609719bSwdenk used. 5083c609719bSwdenk 5084c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5085c609719bSwdenk both addresses are the same, this MAC address is used. 5086c609719bSwdenk 5087c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5088c609719bSwdenk addresses differ, the value from the environment is used and a 5089c609719bSwdenk warning is printed. 5090c609719bSwdenk 5091c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5092c609719bSwdenk is raised. 5093c609719bSwdenk 5094ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5095ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5096ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5097ecee9324SBen WarrenThe naming convention is as follows: 5098ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5099c609719bSwdenk 5100c609719bSwdenkImage Formats: 5101c609719bSwdenk============== 5102c609719bSwdenk 51033310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 51043310c549SMarian Balakowiczimages in two formats: 51053310c549SMarian Balakowicz 51063310c549SMarian BalakowiczNew uImage format (FIT) 51073310c549SMarian Balakowicz----------------------- 51083310c549SMarian Balakowicz 51093310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 51103310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 51113310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 51123310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 51133310c549SMarian Balakowicz 51143310c549SMarian Balakowicz 51153310c549SMarian BalakowiczOld uImage format 51163310c549SMarian Balakowicz----------------- 51173310c549SMarian Balakowicz 51183310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 51193310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 51203310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5121c609719bSwdenk 5122c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5123c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5124f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5125f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5126f5ed9e39SPeter Tyser INTEGRITY). 51277b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5128afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5129afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5130c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5131c609719bSwdenk* Load Address 5132c609719bSwdenk* Entry Point 5133c609719bSwdenk* Image Name 5134c609719bSwdenk* Image Timestamp 5135c609719bSwdenk 5136c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5137c609719bSwdenkand the data portions of the image are secured against corruption by 5138c609719bSwdenkCRC32 checksums. 5139c609719bSwdenk 5140c609719bSwdenk 5141c609719bSwdenkLinux Support: 5142c609719bSwdenk============== 5143c609719bSwdenk 5144c609719bSwdenkAlthough U-Boot should support any OS or standalone application 51457152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5146c609719bSwdenkU-Boot. 5147c609719bSwdenk 5148c609719bSwdenkU-Boot includes many features that so far have been part of some 5149c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5150c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5151c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 51527152b1d0Swdenkserves several purposes: 5153c609719bSwdenk 5154c609719bSwdenk- the same features can be used for other OS or standalone 5155c609719bSwdenk applications (for instance: using compressed images to reduce the 5156c609719bSwdenk Flash memory footprint) 5157c609719bSwdenk 5158c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 51597152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5160c609719bSwdenk 5161c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5162c609719bSwdenk images; of course this also means that different kernel images can 5163c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5164c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5165c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5166c609719bSwdenk software is easier now. 5167c609719bSwdenk 5168c609719bSwdenk 5169c609719bSwdenkLinux HOWTO: 5170c609719bSwdenk============ 5171c609719bSwdenk 5172c609719bSwdenkPorting Linux to U-Boot based systems: 5173c609719bSwdenk--------------------------------------- 5174c609719bSwdenk 5175c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5176c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5177c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5178c609719bSwdenkLinux :-). 5179c609719bSwdenk 5180a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5181c609719bSwdenk 5182c609719bSwdenkJust make sure your machine specific header file (for instance 5183c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 51841dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 51851dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 51866d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5187c609719bSwdenk 5188c609719bSwdenk 5189c609719bSwdenkConfiguring the Linux kernel: 5190c609719bSwdenk----------------------------- 5191c609719bSwdenk 5192c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5193c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5194c609719bSwdenk 5195c609719bSwdenk 5196c609719bSwdenkBuilding a Linux Image: 5197c609719bSwdenk----------------------- 5198c609719bSwdenk 519924ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 520024ee89b9Swdenknot used. If you use recent kernel source, a new build target 520124ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 520224ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 520324ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 520424ee89b9Swdenk100% compatible format. 5205c609719bSwdenk 5206c609719bSwdenkExample: 5207c609719bSwdenk 5208c609719bSwdenk make TQM850L_config 5209c609719bSwdenk make oldconfig 5210c609719bSwdenk make dep 521124ee89b9Swdenk make uImage 5212c609719bSwdenk 521324ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 521424ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 521524ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5216c609719bSwdenk 521724ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 521824ee89b9Swdenk 521924ee89b9Swdenk* convert the kernel into a raw binary image: 522024ee89b9Swdenk 522124ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 522224ee89b9Swdenk -R .note -R .comment \ 522324ee89b9Swdenk -S vmlinux linux.bin 522424ee89b9Swdenk 522524ee89b9Swdenk* compress the binary image: 522624ee89b9Swdenk 522724ee89b9Swdenk gzip -9 linux.bin 522824ee89b9Swdenk 522924ee89b9Swdenk* package compressed binary image for U-Boot: 523024ee89b9Swdenk 523124ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 523224ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 523324ee89b9Swdenk -d linux.bin.gz uImage 523424ee89b9Swdenk 523524ee89b9Swdenk 523624ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 523724ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 523824ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 523924ee89b9Swdenkbyte header containing information about target architecture, 524024ee89b9Swdenkoperating system, image type, compression method, entry points, time 524124ee89b9Swdenkstamp, CRC32 checksums, etc. 524224ee89b9Swdenk 524324ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 524424ee89b9Swdenkprint the header information, or to build new images. 5245c609719bSwdenk 5246c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5247c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5248c609719bSwdenkchecksum verification: 5249c609719bSwdenk 5250c609719bSwdenk tools/mkimage -l image 5251c609719bSwdenk -l ==> list image header information 5252c609719bSwdenk 5253c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5254c609719bSwdenkfrom a "data file" which is used as image payload: 5255c609719bSwdenk 5256c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5257c609719bSwdenk -n name -d data_file image 5258c609719bSwdenk -A ==> set architecture to 'arch' 5259c609719bSwdenk -O ==> set operating system to 'os' 5260c609719bSwdenk -T ==> set image type to 'type' 5261c609719bSwdenk -C ==> set compression type 'comp' 5262c609719bSwdenk -a ==> set load address to 'addr' (hex) 5263c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5264c609719bSwdenk -n ==> set image name to 'name' 5265c609719bSwdenk -d ==> use image data from 'datafile' 5266c609719bSwdenk 526769459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 526869459791Swdenkaddress (0x00000000), but the entry point address depends on the 526969459791Swdenkkernel version: 5270c609719bSwdenk 5271c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 527224ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5273c609719bSwdenk 5274c609719bSwdenkSo a typical call to build a U-Boot image would read: 5275c609719bSwdenk 527624ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 527724ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5278a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 527924ee89b9Swdenk > examples/uImage.TQM850L 528024ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5281c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5282c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5283c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5284c609719bSwdenk Load Address: 0x00000000 528524ee89b9Swdenk Entry Point: 0x00000000 5286c609719bSwdenk 5287c609719bSwdenkTo verify the contents of the image (or check for corruption): 5288c609719bSwdenk 528924ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 529024ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5291c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5292c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5293c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5294c609719bSwdenk Load Address: 0x00000000 529524ee89b9Swdenk Entry Point: 0x00000000 5296c609719bSwdenk 5297c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5298c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5299c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5300c609719bSwdenkneed to be uncompressed: 5301c609719bSwdenk 5302a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 530324ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 530424ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5305a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 530624ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 530724ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5308c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5309c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5310c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5311c609719bSwdenk Load Address: 0x00000000 531224ee89b9Swdenk Entry Point: 0x00000000 5313c609719bSwdenk 5314c609719bSwdenk 5315c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5316c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5317c609719bSwdenk 5318c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5319c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5320c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5321c609719bSwdenk Image Name: Simple Ramdisk Image 5322c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5323c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5324c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5325c609719bSwdenk Load Address: 0x00000000 5326c609719bSwdenk Entry Point: 0x00000000 5327c609719bSwdenk 5328a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5329a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5330a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5331a804b5ceSGuilherme Maciel Ferreirafrom the image: 5332a804b5ceSGuilherme Maciel Ferreira 5333a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5334a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5335a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5336a804b5ceSGuilherme Maciel Ferreira 5337c609719bSwdenk 5338c609719bSwdenkInstalling a Linux Image: 5339c609719bSwdenk------------------------- 5340c609719bSwdenk 5341c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5342c609719bSwdenkyou must convert the image to S-Record format: 5343c609719bSwdenk 5344c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5345c609719bSwdenk 5346c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5347c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5348c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5349c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5350c609719bSwdenkcommand. 5351c609719bSwdenk 5352c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5353c609719bSwdenkTQM8xxL is in the first Flash bank): 5354c609719bSwdenk 5355c609719bSwdenk => erase 40100000 401FFFFF 5356c609719bSwdenk 5357c609719bSwdenk .......... done 5358c609719bSwdenk Erased 8 sectors 5359c609719bSwdenk 5360c609719bSwdenk => loads 40100000 5361c609719bSwdenk ## Ready for S-Record download ... 5362c609719bSwdenk ~>examples/image.srec 5363c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5364c609719bSwdenk ... 5365c609719bSwdenk 15989 15990 15991 15992 5366c609719bSwdenk [file transfer complete] 5367c609719bSwdenk [connected] 5368c609719bSwdenk ## Start Addr = 0x00000000 5369c609719bSwdenk 5370c609719bSwdenk 5371c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5372c609719bSwdenkthis includes a checksum verification so you can be sure no data 5373c609719bSwdenkcorruption happened: 5374c609719bSwdenk 5375c609719bSwdenk => imi 40100000 5376c609719bSwdenk 5377c609719bSwdenk ## Checking Image at 40100000 ... 5378c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5379c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5380c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5381c609719bSwdenk Load Address: 00000000 5382c609719bSwdenk Entry Point: 0000000c 5383c609719bSwdenk Verifying Checksum ... OK 5384c609719bSwdenk 5385c609719bSwdenk 5386c609719bSwdenkBoot Linux: 5387c609719bSwdenk----------- 5388c609719bSwdenk 5389c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5390c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5391c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5392c609719bSwdenkparameters. You can check and modify this variable using the 5393c609719bSwdenk"printenv" and "setenv" commands: 5394c609719bSwdenk 5395c609719bSwdenk 5396c609719bSwdenk => printenv bootargs 5397c609719bSwdenk bootargs=root=/dev/ram 5398c609719bSwdenk 5399c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5400c609719bSwdenk 5401c609719bSwdenk => printenv bootargs 5402c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5403c609719bSwdenk 5404c609719bSwdenk => bootm 40020000 5405c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5406c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5407c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5408c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5409c609719bSwdenk Load Address: 00000000 5410c609719bSwdenk Entry Point: 0000000c 5411c609719bSwdenk Verifying Checksum ... OK 5412c609719bSwdenk Uncompressing Kernel Image ... OK 5413c609719bSwdenk 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 5414c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5415c609719bSwdenk time_init: decrementer frequency = 187500000/60 5416c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5417c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5418c609719bSwdenk ... 5419c609719bSwdenk 542011ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 54217152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5422c609719bSwdenkformat!) to the "bootm" command: 5423c609719bSwdenk 5424c609719bSwdenk => imi 40100000 40200000 5425c609719bSwdenk 5426c609719bSwdenk ## Checking Image at 40100000 ... 5427c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5428c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5429c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5430c609719bSwdenk Load Address: 00000000 5431c609719bSwdenk Entry Point: 0000000c 5432c609719bSwdenk Verifying Checksum ... OK 5433c609719bSwdenk 5434c609719bSwdenk ## Checking Image at 40200000 ... 5435c609719bSwdenk Image Name: Simple Ramdisk Image 5436c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5437c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5438c609719bSwdenk Load Address: 00000000 5439c609719bSwdenk Entry Point: 00000000 5440c609719bSwdenk Verifying Checksum ... OK 5441c609719bSwdenk 5442c609719bSwdenk => bootm 40100000 40200000 5443c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5444c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5445c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5446c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5447c609719bSwdenk Load Address: 00000000 5448c609719bSwdenk Entry Point: 0000000c 5449c609719bSwdenk Verifying Checksum ... OK 5450c609719bSwdenk Uncompressing Kernel Image ... OK 5451c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5452c609719bSwdenk Image Name: Simple Ramdisk Image 5453c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5454c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5455c609719bSwdenk Load Address: 00000000 5456c609719bSwdenk Entry Point: 00000000 5457c609719bSwdenk Verifying Checksum ... OK 5458c609719bSwdenk Loading Ramdisk ... OK 5459c609719bSwdenk 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 5460c609719bSwdenk Boot arguments: root=/dev/ram 5461c609719bSwdenk time_init: decrementer frequency = 187500000/60 5462c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5463c609719bSwdenk ... 5464c609719bSwdenk RAMDISK: Compressed image found at block 0 5465c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5466c609719bSwdenk 5467c609719bSwdenk bash# 5468c609719bSwdenk 54690267768eSMatthew McClintockBoot Linux and pass a flat device tree: 54700267768eSMatthew McClintock----------- 54710267768eSMatthew McClintock 54720267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 54730267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 54740267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 54750267768eSMatthew McClintockflat device tree: 54760267768eSMatthew McClintock 54770267768eSMatthew McClintock=> print oftaddr 54780267768eSMatthew McClintockoftaddr=0x300000 54790267768eSMatthew McClintock=> print oft 54800267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 54810267768eSMatthew McClintock=> tftp $oftaddr $oft 54820267768eSMatthew McClintockSpeed: 1000, full duplex 54830267768eSMatthew McClintockUsing TSEC0 device 54840267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 54850267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 54860267768eSMatthew McClintockLoad address: 0x300000 54870267768eSMatthew McClintockLoading: # 54880267768eSMatthew McClintockdone 54890267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 54900267768eSMatthew McClintock=> tftp $loadaddr $bootfile 54910267768eSMatthew McClintockSpeed: 1000, full duplex 54920267768eSMatthew McClintockUsing TSEC0 device 54930267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 54940267768eSMatthew McClintockFilename 'uImage'. 54950267768eSMatthew McClintockLoad address: 0x200000 54960267768eSMatthew McClintockLoading:############ 54970267768eSMatthew McClintockdone 54980267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 54990267768eSMatthew McClintock=> print loadaddr 55000267768eSMatthew McClintockloadaddr=200000 55010267768eSMatthew McClintock=> print oftaddr 55020267768eSMatthew McClintockoftaddr=0x300000 55030267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 55040267768eSMatthew McClintock## Booting image at 00200000 ... 55050267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 55060267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 55070267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 55080267768eSMatthew McClintock Load Address: 00000000 55090267768eSMatthew McClintock Entry Point: 00000000 55100267768eSMatthew McClintock Verifying Checksum ... OK 55110267768eSMatthew McClintock Uncompressing Kernel Image ... OK 55120267768eSMatthew McClintockBooting using flat device tree at 0x300000 55130267768eSMatthew McClintockUsing MPC85xx ADS machine description 55140267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 55150267768eSMatthew McClintock[snip] 55160267768eSMatthew McClintock 55170267768eSMatthew McClintock 55186069ff26SwdenkMore About U-Boot Image Types: 55196069ff26Swdenk------------------------------ 55206069ff26Swdenk 55216069ff26SwdenkU-Boot supports the following image types: 55226069ff26Swdenk 55236069ff26Swdenk "Standalone Programs" are directly runnable in the environment 55246069ff26Swdenk provided by U-Boot; it is expected that (if they behave 55256069ff26Swdenk well) you can continue to work in U-Boot after return from 55266069ff26Swdenk the Standalone Program. 55276069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 55286069ff26Swdenk will take over control completely. Usually these programs 55296069ff26Swdenk will install their own set of exception handlers, device 55306069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 55316069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 55326069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 55336069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 55346069ff26Swdenk being started. 55356069ff26Swdenk "Multi-File Images" contain several images, typically an OS 55366069ff26Swdenk (Linux) kernel image and one or more data images like 55376069ff26Swdenk RAMDisks. This construct is useful for instance when you want 55386069ff26Swdenk to boot over the network using BOOTP etc., where the boot 55396069ff26Swdenk server provides just a single image file, but you want to get 55406069ff26Swdenk for instance an OS kernel and a RAMDisk image. 55416069ff26Swdenk 55426069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 55436069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 55446069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 55456069ff26Swdenk Immediately after the terminating 0 follow the images, one by 55466069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 55476069ff26Swdenk a multiple of 4 bytes). 55486069ff26Swdenk 55496069ff26Swdenk "Firmware Images" are binary images containing firmware (like 55506069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 55516069ff26Swdenk flash memory. 55526069ff26Swdenk 55536069ff26Swdenk "Script files" are command sequences that will be executed by 55546069ff26Swdenk U-Boot's command interpreter; this feature is especially 55556069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 55566069ff26Swdenk as command interpreter. 55576069ff26Swdenk 555844f074c7SMarek VasutBooting the Linux zImage: 555944f074c7SMarek Vasut------------------------- 556044f074c7SMarek Vasut 556144f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 556244f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 556344f074c7SMarek Vasutas the syntax of "bootm" command. 556444f074c7SMarek Vasut 55658ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5566017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5567017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5568017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5569017e1f3fSMarek Vasut 5570c609719bSwdenk 5571c609719bSwdenkStandalone HOWTO: 5572c609719bSwdenk================= 5573c609719bSwdenk 5574c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5575c609719bSwdenkrun "standalone" applications, which can use some resources of 5576c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5577c609719bSwdenk 5578c609719bSwdenkTwo simple examples are included with the sources: 5579c609719bSwdenk 5580c609719bSwdenk"Hello World" Demo: 5581c609719bSwdenk------------------- 5582c609719bSwdenk 5583c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5584c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5585c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5586c609719bSwdenklike that: 5587c609719bSwdenk 5588c609719bSwdenk => loads 5589c609719bSwdenk ## Ready for S-Record download ... 5590c609719bSwdenk ~>examples/hello_world.srec 5591c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5592c609719bSwdenk [file transfer complete] 5593c609719bSwdenk [connected] 5594c609719bSwdenk ## Start Addr = 0x00040004 5595c609719bSwdenk 5596c609719bSwdenk => go 40004 Hello World! This is a test. 5597c609719bSwdenk ## Starting application at 0x00040004 ... 5598c609719bSwdenk Hello World 5599c609719bSwdenk argc = 7 5600c609719bSwdenk argv[0] = "40004" 5601c609719bSwdenk argv[1] = "Hello" 5602c609719bSwdenk argv[2] = "World!" 5603c609719bSwdenk argv[3] = "This" 5604c609719bSwdenk argv[4] = "is" 5605c609719bSwdenk argv[5] = "a" 5606c609719bSwdenk argv[6] = "test." 5607c609719bSwdenk argv[7] = "<NULL>" 5608c609719bSwdenk Hit any key to exit ... 5609c609719bSwdenk 5610c609719bSwdenk ## Application terminated, rc = 0x0 5611c609719bSwdenk 5612c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5613c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5614c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5615c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5616c609719bSwdenkcharacter, but this is just a demo program. The application can be 5617c609719bSwdenkcontrolled by the following keys: 5618c609719bSwdenk 5619c609719bSwdenk ? - print current values og the CPM Timer registers 5620c609719bSwdenk b - enable interrupts and start timer 5621c609719bSwdenk e - stop timer and disable interrupts 5622c609719bSwdenk q - quit application 5623c609719bSwdenk 5624c609719bSwdenk => loads 5625c609719bSwdenk ## Ready for S-Record download ... 5626c609719bSwdenk ~>examples/timer.srec 5627c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5628c609719bSwdenk [file transfer complete] 5629c609719bSwdenk [connected] 5630c609719bSwdenk ## Start Addr = 0x00040004 5631c609719bSwdenk 5632c609719bSwdenk => go 40004 5633c609719bSwdenk ## Starting application at 0x00040004 ... 5634c609719bSwdenk TIMERS=0xfff00980 5635c609719bSwdenk Using timer 1 5636c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5637c609719bSwdenk 5638c609719bSwdenkHit 'b': 5639c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5640c609719bSwdenk Enabling timer 5641c609719bSwdenkHit '?': 5642c609719bSwdenk [q, b, e, ?] ........ 5643c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5644c609719bSwdenkHit '?': 5645c609719bSwdenk [q, b, e, ?] . 5646c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5647c609719bSwdenkHit '?': 5648c609719bSwdenk [q, b, e, ?] . 5649c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5650c609719bSwdenkHit '?': 5651c609719bSwdenk [q, b, e, ?] . 5652c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5653c609719bSwdenkHit 'e': 5654c609719bSwdenk [q, b, e, ?] ...Stopping timer 5655c609719bSwdenkHit 'q': 5656c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5657c609719bSwdenk 5658c609719bSwdenk 565985ec0bccSwdenkMinicom warning: 566085ec0bccSwdenk================ 566185ec0bccSwdenk 56627152b1d0SwdenkOver time, many people have reported problems when trying to use the 566385ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 566485ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5665f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 566685ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5667e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5668e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5669e53515a2SKarl O. Pincfor help with kermit. 5670e53515a2SKarl O. Pinc 567185ec0bccSwdenk 567252f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 567352f52c14Swdenkconfiguration to your "File transfer protocols" section: 567452f52c14Swdenk 567552f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 567652f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 567752f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 567852f52c14Swdenk 567952f52c14Swdenk 5680c609719bSwdenkNetBSD Notes: 5681c609719bSwdenk============= 5682c609719bSwdenk 5683c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5684c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5685c609719bSwdenk 5686c609719bSwdenkBuilding requires a cross environment; it is known to work on 5687c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5688c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5689c609719bSwdenkNote that the cross-powerpc package does not install include files; 5690c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5691c609719bSwdenkmissing. This file has to be installed and patched manually: 5692c609719bSwdenk 5693c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5694c609719bSwdenk # mkdir powerpc 5695c609719bSwdenk # ln -s powerpc machine 5696c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5697c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5698c609719bSwdenk 5699c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5700c609719bSwdenkand U-Boot include files. 5701c609719bSwdenk 5702c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5703c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5704c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5705c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 57062a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5707c609719bSwdenk 5708c609719bSwdenk 5709c609719bSwdenkImplementation Internals: 5710c609719bSwdenk========================= 5711c609719bSwdenk 5712c609719bSwdenkThe following is not intended to be a complete description of every 5713c609719bSwdenkimplementation detail. However, it should help to understand the 5714c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5715c609719bSwdenkhardware. 5716c609719bSwdenk 5717c609719bSwdenk 5718c609719bSwdenkInitial Stack, Global Data: 5719c609719bSwdenk--------------------------- 5720c609719bSwdenk 5721c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5722c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5723c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5724c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5725c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5726c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5727c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5728c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5729c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5730c609719bSwdenklocked as (mis-) used as memory, etc. 5731c609719bSwdenk 57327152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 57330668236bSWolfgang Denk U-Boot mailing list: 573443d9616cSwdenk 573543d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 573643d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 573743d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 573843d9616cSwdenk ... 573943d9616cSwdenk 574043d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 574143d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 574243d9616cSwdenk require any physical RAM backing up the cache. The cleverness 574343d9616cSwdenk is that the cache is being used as a temporary supply of 574443d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 574511ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 574643d9616cSwdenk can see how this works by studying the cache architecture and 574743d9616cSwdenk operation in the architecture and processor-specific manuals. 574843d9616cSwdenk 574943d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 575043d9616cSwdenk is another option for the system designer to use as an 575111ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 575243d9616cSwdenk option should work for you. Using CS 4 should be fine if your 575343d9616cSwdenk board designers haven't used it for something that would 575443d9616cSwdenk cause you grief during the initial boot! It is frequently not 575543d9616cSwdenk used. 575643d9616cSwdenk 57576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 575843d9616cSwdenk with your processor/board/system design. The default value 575943d9616cSwdenk you will find in any recent u-boot distribution in 57608a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 576143d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 576243d9616cSwdenk it above 400_0000. Just make sure your board has no resources 576343d9616cSwdenk that are supposed to respond to that address! That code in 576443d9616cSwdenk start.S has been around a while and should work as is when 576543d9616cSwdenk you get the config right. 576643d9616cSwdenk 576743d9616cSwdenk -Chris Hallinan 576843d9616cSwdenk DS4.COM, Inc. 576943d9616cSwdenk 5770c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5771c609719bSwdenkcode for the initialization procedures: 5772c609719bSwdenk 5773c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5774c609719bSwdenk to write it. 5775c609719bSwdenk 577611ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5777c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 57787152b1d0Swdenk zation is performed later (when relocating to RAM). 5779c609719bSwdenk 5780c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5781c609719bSwdenk that. 5782c609719bSwdenk 5783c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5784c609719bSwdenknormal global data to share information beween the code. But it 5785c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5786c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5787c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5788c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5789c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5790c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5791c609719bSwdenkreserve for this purpose. 5792c609719bSwdenk 57937152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5794c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5795c609719bSwdenkGCC's implementation. 5796c609719bSwdenk 5797c609719bSwdenkFor PowerPC, the following registers have specific use: 5798c609719bSwdenk R1: stack pointer 5799e7670f6cSWolfgang Denk R2: reserved for system use 5800c609719bSwdenk R3-R4: parameter passing and return values 5801c609719bSwdenk R5-R10: parameter passing 5802c609719bSwdenk R13: small data area pointer 5803c609719bSwdenk R30: GOT pointer 5804c609719bSwdenk R31: frame pointer 5805c609719bSwdenk 5806e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5807e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5808e6bee808SJoakim Tjernlund going back and forth between asm and C) 5809c609719bSwdenk 5810e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5811c609719bSwdenk 5812c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5813c609719bSwdenk address of the global data structure is known at compile time), 5814c609719bSwdenk but it turned out that reserving a register results in somewhat 5815c609719bSwdenk smaller code - although the code savings are not that big (on 5816c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5817c609719bSwdenk 624 text + 127 data). 5818c609719bSwdenk 5819c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 58204c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 58214c58eb55SMike Frysinger 5822c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 58234c58eb55SMike Frysinger 5824c609719bSwdenkOn ARM, the following registers are used: 5825c609719bSwdenk 5826c609719bSwdenk R0: function argument word/integer result 5827c609719bSwdenk R1-R3: function argument word 582812eba1b4SJeroen Hofstee R9: platform specific 582912eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 5830c609719bSwdenk R11: argument (frame) pointer 5831c609719bSwdenk R12: temporary workspace 5832c609719bSwdenk R13: stack pointer 5833c609719bSwdenk R14: link register 5834c609719bSwdenk R15: program counter 5835c609719bSwdenk 583612eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 583712eba1b4SJeroen Hofstee 583812eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 5839c609719bSwdenk 58400df01fd3SThomas ChouOn Nios II, the ABI is documented here: 58410df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 58420df01fd3SThomas Chou 58430df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 58440df01fd3SThomas Chou 58450df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 58460df01fd3SThomas Chou to access small data sections, so gp is free. 58470df01fd3SThomas Chou 5848afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5849afc1ce82SMacpaul Lin 5850afc1ce82SMacpaul Lin R0-R1: argument/return 5851afc1ce82SMacpaul Lin R2-R5: argument 5852afc1ce82SMacpaul Lin R15: temporary register for assembler 5853afc1ce82SMacpaul Lin R16: trampoline register 5854afc1ce82SMacpaul Lin R28: frame pointer (FP) 5855afc1ce82SMacpaul Lin R29: global pointer (GP) 5856afc1ce82SMacpaul Lin R30: link register (LP) 5857afc1ce82SMacpaul Lin R31: stack pointer (SP) 5858afc1ce82SMacpaul Lin PC: program counter (PC) 5859afc1ce82SMacpaul Lin 5860afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5861afc1ce82SMacpaul Lin 5862d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5863d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5864c609719bSwdenk 5865c609719bSwdenkMemory Management: 5866c609719bSwdenk------------------ 5867c609719bSwdenk 5868c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5869c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5870c609719bSwdenk 5871c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5872c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5873c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5874c609719bSwdenkphysical memory banks. 5875c609719bSwdenk 5876c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5877c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5878c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5879c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 58806d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5881c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5882c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5883c609719bSwdenk 5884c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5885c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5886c609719bSwdenk 5887c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5888c609719bSwdenkthis: 5889c609719bSwdenk 5890c609719bSwdenk 0x0000 0000 Exception Vector code 5891c609719bSwdenk : 5892c609719bSwdenk 0x0000 1FFF 5893c609719bSwdenk 0x0000 2000 Free for Application Use 5894c609719bSwdenk : 5895c609719bSwdenk : 5896c609719bSwdenk 5897c609719bSwdenk : 5898c609719bSwdenk : 5899c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5900c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5901c609719bSwdenk 0x00FC 0000 Malloc Arena 5902c609719bSwdenk : 5903c609719bSwdenk 0x00FD FFFF 5904c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5905c609719bSwdenk ... eventually: LCD or video framebuffer 5906c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5907c609719bSwdenk 0x00FF FFFF [End of RAM] 5908c609719bSwdenk 5909c609719bSwdenk 5910c609719bSwdenkSystem Initialization: 5911c609719bSwdenk---------------------- 5912c609719bSwdenk 5913c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 591411ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5915c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 59167152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5917c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5918c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5919c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5920c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5921c609719bSwdenkthe caches and the SIU. 5922c609719bSwdenk 5923c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5924c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5925c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5926c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5927c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5928c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5929c609719bSwdenkbanks. 5930c609719bSwdenk 5931c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 59327152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5933c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5934c609719bSwdenk0x00000000, with any additional banks following immediately to create 5935c609719bSwdenkcontiguous memory starting from 0. 5936c609719bSwdenk 5937c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5938c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5939c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5940c609719bSwdenkpages, and the final stack is set up. 5941c609719bSwdenk 5942c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5943c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5944c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5945c609719bSwdenknew address in RAM. 5946c609719bSwdenk 5947c609719bSwdenk 5948c609719bSwdenkU-Boot Porting Guide: 5949c609719bSwdenk---------------------- 5950c609719bSwdenk 5951c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 59526aff3115Swdenklist, October 2002] 5953c609719bSwdenk 5954c609719bSwdenk 5955c609719bSwdenkint main(int argc, char *argv[]) 5956c609719bSwdenk{ 5957c609719bSwdenk sighandler_t no_more_time; 5958c609719bSwdenk 5959c609719bSwdenk signal(SIGALRM, no_more_time); 5960c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5961c609719bSwdenk 5962c609719bSwdenk if (available_money > available_manpower) { 59636c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5964c609719bSwdenk return 0; 5965c609719bSwdenk } 5966c609719bSwdenk 5967c609719bSwdenk Download latest U-Boot source; 5968c609719bSwdenk 59690668236bSWolfgang Denk Subscribe to u-boot mailing list; 59706aff3115Swdenk 59716c3fef28SJerry Van Baren if (clueless) 5972c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5973c609719bSwdenk 5974c609719bSwdenk while (learning) { 5975c609719bSwdenk Read the README file in the top level directory; 59767cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 59776c3fef28SJerry Van Baren Read applicable doc/*.README; 5978c609719bSwdenk Read the source, Luke; 59796c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5980c609719bSwdenk } 5981c609719bSwdenk 59826c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 59836c3fef28SJerry Van Baren Buy a BDI3000; 59846c3fef28SJerry Van Baren else 5985c609719bSwdenk Add a lot of aggravation and time; 5986c609719bSwdenk 59876c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 59886c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 59896c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 59906c3fef28SJerry Van Baren } else { 5991c609719bSwdenk Create your own board support subdirectory; 59926c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 59936c3fef28SJerry Van Baren } 59946c3fef28SJerry Van Baren Edit new board/<myboard> files 59956c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5996c609719bSwdenk 59976c3fef28SJerry Van Baren while (!accepted) { 5998c609719bSwdenk while (!running) { 5999c609719bSwdenk do { 6000c609719bSwdenk Add / modify source code; 6001c609719bSwdenk } until (compiles); 6002c609719bSwdenk Debug; 6003c609719bSwdenk if (clueless) 6004c609719bSwdenk email("Hi, I am having problems..."); 6005c609719bSwdenk } 60066c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 60076c3fef28SJerry Van Baren if (reasonable critiques) 60086c3fef28SJerry Van Baren Incorporate improvements from email list code review; 60096c3fef28SJerry Van Baren else 60106c3fef28SJerry Van Baren Defend code as written; 60116c3fef28SJerry Van Baren } 6012c609719bSwdenk 6013c609719bSwdenk return 0; 6014c609719bSwdenk} 6015c609719bSwdenk 6016c609719bSwdenkvoid no_more_time (int sig) 6017c609719bSwdenk{ 6018c609719bSwdenk hire_a_guru(); 6019c609719bSwdenk} 6020c609719bSwdenk 6021c609719bSwdenk 6022c609719bSwdenkCoding Standards: 6023c609719bSwdenk----------------- 6024c609719bSwdenk 6025c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 60262c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 60277ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6028c609719bSwdenk 60292c051651SDetlev ZundelSource files originating from a different project (for example the 60302c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 60312c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 60322c051651SDetlev Zundelsources. 60332c051651SDetlev Zundel 60342c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 60352c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 60362c051651SDetlev Zundelin your code. 6037c609719bSwdenk 6038c178d3daSwdenkPlease also stick to the following formatting rules: 6039180d3f74Swdenk- remove any trailing white space 60407ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6041180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 60427ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6043180d3f74Swdenk- do not add trailing empty lines to source files 6044180d3f74Swdenk 6045c609719bSwdenkSubmissions which do not conform to the standards may be returned 6046c609719bSwdenkwith a request to reformat the changes. 6047c609719bSwdenk 6048c609719bSwdenk 6049c609719bSwdenkSubmitting Patches: 6050c609719bSwdenk------------------- 6051c609719bSwdenk 6052c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6053c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6054c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6055c609719bSwdenk 60560d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6057218ca724SWolfgang Denk 60580668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 60590668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 60600668236bSWolfgang Denk 6061c609719bSwdenkWhen you send a patch, please include the following information with 6062c609719bSwdenkit: 6063c609719bSwdenk 6064c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6065c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6066c609719bSwdenk patch actually fixes something. 6067c609719bSwdenk 6068c609719bSwdenk* For new features: a description of the feature and your 6069c609719bSwdenk implementation. 6070c609719bSwdenk 6071c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6072c609719bSwdenk 6073c609719bSwdenk* For major contributions, your entry to the CREDITS file 6074c609719bSwdenk 607527af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 607627af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6077c609719bSwdenk 6078c609719bSwdenk* If your patch adds new configuration options, don't forget to 6079c609719bSwdenk document these in the README file. 6080c609719bSwdenk 6081218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6082218ca724SWolfgang Denk recommended) you can easily generate the patch using the 60837ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6084218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6085218ca724SWolfgang Denk with some other mail clients. 6086c609719bSwdenk 6087218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6088218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6089218ca724SWolfgang Denk GNU diff. 60906dff5529Swdenk 6091218ca724SWolfgang Denk The current directory when running this command shall be the parent 6092218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6093218ca724SWolfgang Denk your patch includes sufficient directory information for the 6094218ca724SWolfgang Denk affected files). 6095218ca724SWolfgang Denk 6096218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6097218ca724SWolfgang Denk and compressed attachments must not be used. 6098c609719bSwdenk 609952f52c14Swdenk* If one logical set of modifications affects or creates several 610052f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 610152f52c14Swdenk 610252f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 610352f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 610452f52c14Swdenk 610552f52c14Swdenk 6106c609719bSwdenkNotes: 6107c609719bSwdenk 6108c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6109c609719bSwdenk source tree and make sure that no errors or warnings are reported 6110c609719bSwdenk for any of the boards. 6111c609719bSwdenk 6112c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6113c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6114c609719bSwdenk returned with a request to re-formatting / split it. 6115c609719bSwdenk 6116c609719bSwdenk* If you modify existing code, make sure that your new code does not 6117c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6118c609719bSwdenk When adding new features, these should compile conditionally only 6119c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6120c609719bSwdenk disabled must not need more memory than the old code without your 6121c609719bSwdenk modification. 612290dc6704Swdenk 61230668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 61240668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 61250668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 61260668236bSWolfgang Denk bigger than the size limit should be avoided. 6127