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 495*6b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 496*6b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 497*6b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 498*6b9e309aSYork Sun it could be different for ARM SoCs. 499*6b9e309aSYork Sun 5000b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5020b953ffcSMarkus Klotzbuecher 5030b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5040b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5050b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5060b953ffcSMarkus Klotzbuecher 5076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5080b953ffcSMarkus Klotzbuecher 5090b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5100b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5110b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5120b953ffcSMarkus Klotzbuecher by this value. 5130b953ffcSMarkus Klotzbuecher 51492bbd64eSDaniel Schwierzeck- MIPS CPU options: 51592bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 51692bbd64eSDaniel Schwierzeck 51792bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 51892bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 51992bbd64eSDaniel Schwierzeck relocation. 52092bbd64eSDaniel Schwierzeck 52192bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 52292bbd64eSDaniel Schwierzeck 52392bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 52492bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 52592bbd64eSDaniel Schwierzeck Possible values are: 52692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 52792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 52892bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 52992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 53092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 53192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 53292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 53392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 53492bbd64eSDaniel Schwierzeck 53592bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 53692bbd64eSDaniel Schwierzeck 53792bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 53892bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 53992bbd64eSDaniel Schwierzeck 54092bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 54192bbd64eSDaniel Schwierzeck 54292bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 54392bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 54492bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 54592bbd64eSDaniel Schwierzeck 546b67d8816SChristian Riesch- ARM options: 547b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 548b67d8816SChristian Riesch 549b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 550b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 551b67d8816SChristian Riesch 5525356f545SAneesh V CONFIG_SYS_THUMB_BUILD 5535356f545SAneesh V 5545356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 5555356f545SAneesh V set for ARM architectures. Thumb instruction set provides 5565356f545SAneesh V better code density. For ARM architectures that support 5575356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 5585356f545SAneesh V GCC. 5595356f545SAneesh V 560c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 5610678587fSStephen Warren CONFIG_ARM_ERRATA_742230 5620678587fSStephen Warren CONFIG_ARM_ERRATA_743622 5630678587fSStephen Warren CONFIG_ARM_ERRATA_751472 5640678587fSStephen Warren 5650678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 5660678587fSStephen Warren during U-Boot startup. Note that these options force the 5670678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 5680678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 5690678587fSStephen Warren set these options unless they apply! 5700678587fSStephen Warren 571795659dcSStephen Warren- CPU timer options: 572795659dcSStephen Warren CONFIG_SYS_HZ 573795659dcSStephen Warren 574795659dcSStephen Warren The frequency of the timer returned by get_timer(). 575795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 576795659dcSStephen Warren option must be set to 1000. 577795659dcSStephen Warren 5785da627a4Swdenk- Linux Kernel Interface: 579c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 580c609719bSwdenk 581c609719bSwdenk U-Boot stores all clock information in Hz 582c609719bSwdenk internally. For binary compatibility with older Linux 583c609719bSwdenk kernels (which expect the clocks passed in the 584c609719bSwdenk bd_info data to be in MHz) the environment variable 585c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 586c609719bSwdenk converts clock data to MHZ before passing it to the 587c609719bSwdenk Linux kernel. 588c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 589c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 590c609719bSwdenk default environment. 591c609719bSwdenk 5925da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 5935da627a4Swdenk 59411ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 5955da627a4Swdenk expect it to be in bytes, others in MB. 5965da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 5975da627a4Swdenk 598fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 599f57f70aaSWolfgang Denk 600f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 601213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 602213bf8c8SGerald Van Baren concepts). 603213bf8c8SGerald Van Baren 604213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 605213bf8c8SGerald Van Baren * New libfdt-based support 606213bf8c8SGerald Van Baren * Adds the "fdt" command 6073bb342fcSKim Phillips * The bootm command automatically updates the fdt 608213bf8c8SGerald Van Baren 609b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 610b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 611b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 612b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 613f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 614c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 615f57f70aaSWolfgang Denk 61611ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 61711ccc33fSMarcel Ziswiler addresses 6183bb342fcSKim Phillips 6194e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6204e253137SKumar Gala 6214e253137SKumar Gala Board code has addition modification that it wants to make 6224e253137SKumar Gala to the flat device tree before handing it off to the kernel 6236705d81eSwdenk 6240267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6250267768eSMatthew McClintock 62611ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6270267768eSMatthew McClintock param header, the default value is zero if undefined. 6280267768eSMatthew McClintock 6293887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6303887c3fbSHeiko Schocher 6313887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6323887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6333887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6343887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6353887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6363887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6373887c3fbSHeiko Schocher 6387eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6397eb29398SIgor Grinberg 6407eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6417eb29398SIgor Grinberg machine type and must be used to specify the machine type 6427eb29398SIgor Grinberg number as it appears in the ARM machine registry 6437eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6447eb29398SIgor Grinberg Only boards that have multiple machine types supported 6457eb29398SIgor Grinberg in a single configuration file and the machine type is 6467eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6477eb29398SIgor Grinberg 6480b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6490b2f4ecaSNiklaus Giger 6500b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6510b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 6520b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6530b2f4ecaSNiklaus Giger 6540b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 6550b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 6560b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 6570b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 6580b2f4ecaSNiklaus Giger 6590b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 6600b2f4ecaSNiklaus Giger 6610b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 6620b2f4ecaSNiklaus Giger 6630b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 6640b2f4ecaSNiklaus Giger the defaults discussed just above. 6650b2f4ecaSNiklaus Giger 6662c451f78SAneesh V- Cache Configuration: 6672c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 6682c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 6692c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 6702c451f78SAneesh V 67193bc2193SAneesh V- Cache Configuration for ARM: 67293bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 67393bc2193SAneesh V controller 67493bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 67593bc2193SAneesh V controller register space 67693bc2193SAneesh V 6776705d81eSwdenk- Serial Ports: 67848d0192fSAndreas Engel CONFIG_PL010_SERIAL 6796705d81eSwdenk 6806705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 6816705d81eSwdenk 68248d0192fSAndreas Engel CONFIG_PL011_SERIAL 6836705d81eSwdenk 6846705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 6856705d81eSwdenk 6866705d81eSwdenk CONFIG_PL011_CLOCK 6876705d81eSwdenk 6886705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 6896705d81eSwdenk the clock speed of the UARTs. 6906705d81eSwdenk 6916705d81eSwdenk CONFIG_PL01x_PORTS 6926705d81eSwdenk 6936705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 6946705d81eSwdenk define this to a list of base addresses for each (supported) 6956705d81eSwdenk port. See e.g. include/configs/versatile.h 6966705d81eSwdenk 697910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 698910f1ae3SJohn Rigby 699910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 700910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 701910f1ae3SJohn Rigby this variable to initialize the extra register. 702910f1ae3SJohn Rigby 703910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 704910f1ae3SJohn Rigby 705910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 706910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 707910f1ae3SJohn Rigby variable to flush the UART at init time. 708910f1ae3SJohn Rigby 7096705d81eSwdenk 710c609719bSwdenk- Console Interface: 711c609719bSwdenk Depending on board, define exactly one serial port 712c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 713c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 714c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 715c609719bSwdenk 716c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 717c609719bSwdenk port routines must be defined elsewhere 718c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 719c609719bSwdenk 720c609719bSwdenk CONFIG_CFB_CONSOLE 721c609719bSwdenk Enables console device for a color framebuffer. Needs following 722c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 723c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 724c609719bSwdenk (default big endian) 725c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 726c609719bSwdenk rectangle fill 727c609719bSwdenk (cf. smiLynxEM) 728c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 729c609719bSwdenk bit-blit (cf. smiLynxEM) 730c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 731c609719bSwdenk (cols=pitch) 732c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 733c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 734c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 735c609719bSwdenk (0-5, cf. cfb_console.c) 736c609719bSwdenk VIDEO_FB_ADRS framebuffer address 737c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 738c609719bSwdenk (i.e. i8042_kbd_init()) 739c609719bSwdenk VIDEO_TSTC_FCT test char fct 740c609719bSwdenk (i.e. i8042_tstc) 741c609719bSwdenk VIDEO_GETC_FCT get char fct 742c609719bSwdenk (i.e. i8042_getc) 743c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 744c609719bSwdenk (requires blink timer 745c609719bSwdenk cf. i8042.c) 7466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 747c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 748c609719bSwdenk upper right corner 749602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 750c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 751c609719bSwdenk upper left corner 752a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 753a6c7ad2fSwdenk linux_logo.h for logo. 754a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 755c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 75611ccc33fSMarcel Ziswiler additional board info beside 757c609719bSwdenk the logo 758c609719bSwdenk 75933a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 76033a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 76133a35bbbSPali Rohár erase functions and limited graphics rendition control). 76233a35bbbSPali Rohár 763c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 764c609719bSwdenk default i/o. Serial console can be forced with 765c609719bSwdenk environment 'console=serial'. 766c609719bSwdenk 767a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 768a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 769a3ad8e26Swdenk the "silent" environment variable. See 770a3ad8e26Swdenk doc/README.silent for more information. 771a3ad8e26Swdenk 77245ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 77345ae2546SHeiko Schocher is 0x00. 77445ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 77545ae2546SHeiko Schocher is 0xa0. 77645ae2546SHeiko Schocher 777c609719bSwdenk- Console Baudrate: 778c609719bSwdenk CONFIG_BAUDRATE - in bps 779c609719bSwdenk Select one of the baudrates listed in 7806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 7816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 782c609719bSwdenk 783c92fac91SHeiko Schocher- Console Rx buffer length 784c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 785c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 7862b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 787c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 788c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 789c92fac91SHeiko Schocher the SMC. 790c92fac91SHeiko Schocher 7919558b48aSGraeme Russ- Pre-Console Buffer: 7929558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 7939558b48aSGraeme Russ initialised etc) all console output is silently discarded. 7949558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 7959558b48aSGraeme Russ buffer any console messages prior to the console being 7969558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 7979558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 7989558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 7999558b48aSGraeme Russ bytes are output before the console is initialised, the 8009558b48aSGraeme Russ earlier bytes are discarded. 8019558b48aSGraeme Russ 8029558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8039558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8049558b48aSGraeme Russ 805046a37bdSSonny Rao- Safe printf() functions 806046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 807046a37bdSSonny Rao the printf() functions. These are defined in 808046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 809046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 810046a37bdSSonny Rao If this option is not given then these functions will 811046a37bdSSonny Rao silently discard their buffer size argument - this means 812046a37bdSSonny Rao you are not getting any overflow checking in this case. 813046a37bdSSonny Rao 814c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 815c609719bSwdenk Delay before automatically booting the default image; 816c609719bSwdenk set to -1 to disable autoboot. 81793d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 81893d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 819c609719bSwdenk 820c609719bSwdenk See doc/README.autoboot for these options that 821c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 822c609719bSwdenk CONFIG_BOOT_RETRY_TIME 823c609719bSwdenk CONFIG_BOOT_RETRY_MIN 824c609719bSwdenk CONFIG_AUTOBOOT_KEYED 825c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 826c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 827c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 828c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 829c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 830c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 831c609719bSwdenk CONFIG_RESET_TO_RETRY 832c609719bSwdenk 833c609719bSwdenk- Autoboot Command: 834c609719bSwdenk CONFIG_BOOTCOMMAND 835c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 836c609719bSwdenk define a command string that is automatically executed 837c609719bSwdenk when no character is read on the console interface 838c609719bSwdenk within "Boot Delay" after reset. 839c609719bSwdenk 840c609719bSwdenk CONFIG_BOOTARGS 841c609719bSwdenk This can be used to pass arguments to the bootm 842c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 843c609719bSwdenk environment value "bootargs". 844c609719bSwdenk 845c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 846c609719bSwdenk The value of these goes into the environment as 847c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 848c609719bSwdenk as a convenience, when switching between booting from 84911ccc33fSMarcel Ziswiler RAM and NFS. 850c609719bSwdenk 851eda0ba38SHeiko Schocher- Bootcount: 852eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 853eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 854eda0ba38SHeiko Schocher cycle, see: 855eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 856eda0ba38SHeiko Schocher 857eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 858eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 859eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 860eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 861eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 862eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 863eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 864eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 865eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 866eda0ba38SHeiko Schocher 867c609719bSwdenk- Pre-Boot Commands: 868c609719bSwdenk CONFIG_PREBOOT 869c609719bSwdenk 870c609719bSwdenk When this option is #defined, the existence of the 871c609719bSwdenk environment variable "preboot" will be checked 872c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 873c609719bSwdenk countdown and/or running the auto-boot command resp. 874c609719bSwdenk entering interactive mode. 875c609719bSwdenk 876c609719bSwdenk This feature is especially useful when "preboot" is 877c609719bSwdenk automatically generated or modified. For an example 878c609719bSwdenk see the LWMON board specific code: here "preboot" is 879c609719bSwdenk modified when the user holds down a certain 880c609719bSwdenk combination of keys on the (special) keyboard when 881c609719bSwdenk booting the systems 882c609719bSwdenk 883c609719bSwdenk- Serial Download Echo Mode: 884c609719bSwdenk CONFIG_LOADS_ECHO 885c609719bSwdenk If defined to 1, all characters received during a 886c609719bSwdenk serial download (using the "loads" command) are 887c609719bSwdenk echoed back. This might be needed by some terminal 888c609719bSwdenk emulations (like "cu"), but may as well just take 889c609719bSwdenk time on others. This setting #define's the initial 890c609719bSwdenk value of the "loads_echo" environment variable. 891c609719bSwdenk 892602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 893c609719bSwdenk CONFIG_KGDB_BAUDRATE 894c609719bSwdenk Select one of the baudrates listed in 8956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 896c609719bSwdenk 897c609719bSwdenk- Monitor Functions: 898602ad3b3SJon Loeliger Monitor commands can be included or excluded 899602ad3b3SJon Loeliger from the build by using the #include files 900c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 901c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 902602ad3b3SJon Loeliger and augmenting with additional #define's 903602ad3b3SJon Loeliger for wanted commands. 904c609719bSwdenk 905602ad3b3SJon Loeliger The default command configuration includes all commands 906602ad3b3SJon Loeliger except those marked below with a "*". 907602ad3b3SJon Loeliger 908602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 909602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 910602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 911602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 912602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 913602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 914602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 91508d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 916602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 917710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 918602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 919602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 920602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 921a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 922a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 923a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 924a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 925602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 926602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 927246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 928602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 929602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9305e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 931fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 93288733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9330c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 93403e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 93503e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 93616f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 93716f4d933SStephen Warren that work for multiple fs types 938bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 939602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 94003e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 941602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 942602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9434d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 94453fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 945a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 946a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 947bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 948602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 949602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 950602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 951602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 9528fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 9534d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 954602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 9550c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 956c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 957602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 958602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 959602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 960602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 9614d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 962d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 963d22c338eSJoe Hershberger (169.254.*.*) 964602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 965602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 9664d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 96702c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 96815a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 969602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 970a2681707SWolfgang Denk loop, loopw 9714d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 972602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 973602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 974602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 97568d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 976602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 977602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 9784d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 979e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 980e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 981602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 982602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 983602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 984602ad3b3SJon Loeliger host 985602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 986ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 987602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 988602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 989d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 990602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 991602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 992602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 993602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 994602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 995602ad3b3SJon Loeliger (4xx only) 996f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 9974d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 99802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 9997d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 100074de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1001602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10027a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10031fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1004da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1005da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1006602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1007602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1008c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10094d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 1010c609719bSwdenk 1011c609719bSwdenk 1012c609719bSwdenk EXAMPLE: If you want all functions except of network 1013c609719bSwdenk support you can write: 1014c609719bSwdenk 1015602ad3b3SJon Loeliger #include "config_cmd_all.h" 1016602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1017c609719bSwdenk 1018213bf8c8SGerald Van Baren Other Commands: 1019213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1020c609719bSwdenk 1021c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1022602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1023c609719bSwdenk what you (and your U-Boot users) are doing. Data 1024c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1025c609719bSwdenk 8260 (where accesses to the IMMR region must be 1026c609719bSwdenk uncached), and it cannot be disabled on all other 1027c609719bSwdenk systems where we (mis-) use the data cache to hold an 1028c609719bSwdenk initial stack and some data. 1029c609719bSwdenk 1030c609719bSwdenk 1031c609719bSwdenk XXX - this list needs to get updated! 1032c609719bSwdenk 1033a5ecbe62SWolfgang Denk- Regular expression support: 1034a5ecbe62SWolfgang Denk CONFIG_REGEX 1035a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1036a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1037a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1038a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1039a5ecbe62SWolfgang Denk 104045ba8077SSimon Glass- Device tree: 104145ba8077SSimon Glass CONFIG_OF_CONTROL 104245ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 104345ba8077SSimon Glass to configure its devices, instead of relying on statically 104445ba8077SSimon Glass compiled #defines in the board file. This option is 104545ba8077SSimon Glass experimental and only available on a few boards. The device 104645ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 104745ba8077SSimon Glass 10482c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10492c0f79e4SSimon Glass be done using one of the two options below: 1050bbb0b128SSimon Glass 1051bbb0b128SSimon Glass CONFIG_OF_EMBED 1052bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1053bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1054bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1055bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1056bbb0b128SSimon Glass the global data structure as gd->blob. 105745ba8077SSimon Glass 10582c0f79e4SSimon Glass CONFIG_OF_SEPARATE 10592c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 10602c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 10612c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 10622c0f79e4SSimon Glass 10632c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 10642c0f79e4SSimon Glass 10652c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 10662c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 10672c0f79e4SSimon Glass still use the individual files if you need something more 10682c0f79e4SSimon Glass exotic. 10692c0f79e4SSimon Glass 1070c609719bSwdenk- Watchdog: 1071c609719bSwdenk CONFIG_WATCHDOG 1072c609719bSwdenk If this variable is defined, it enables watchdog 10736abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 10746abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 10756abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 10766abe6fb6SDetlev Zundel register. When supported for a specific SoC is 10776abe6fb6SDetlev Zundel available, then no further board specific code should 10786abe6fb6SDetlev Zundel be needed to use it. 10796abe6fb6SDetlev Zundel 10806abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 10816abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 10826abe6fb6SDetlev Zundel SoC, then define this variable and provide board 10836abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1084c609719bSwdenk 1085c1551ea8Sstroese- U-Boot Version: 1086c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1087c1551ea8Sstroese If this variable is defined, an environment variable 1088c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1089c1551ea8Sstroese version as printed by the "version" command. 1090a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1091a1ea8e51SBenoît Thébaudeau next reset. 1092c1551ea8Sstroese 1093c609719bSwdenk- Real-Time Clock: 1094c609719bSwdenk 1095602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1096c609719bSwdenk has to be selected, too. Define exactly one of the 1097c609719bSwdenk following options: 1098c609719bSwdenk 1099c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1100c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11014e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1102c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11031cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1104c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11057f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 11063bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11079536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11084c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 111071d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 111171d19f30SHeiko Schocher RV3029 RTC. 1112c609719bSwdenk 1113b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1114b37c7e5eSwdenk must also be configured. See I2C Support, below. 1115b37c7e5eSwdenk 1116e92739d3SPeter Tyser- GPIO Support: 1117e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1118e92739d3SPeter Tyser 11195dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11205dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11215dec49caSChris Packham pins supported by a particular chip. 11225dec49caSChris Packham 1123e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1124e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1125e92739d3SPeter Tyser 1126c609719bSwdenk- Timestamp Support: 1127c609719bSwdenk 1128c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1129c609719bSwdenk (date and time) of an image is printed by image 1130c609719bSwdenk commands like bootm or iminfo. This option is 1131602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1132c609719bSwdenk 1133923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1134923c46f9SKarl O. Pinc Zero or more of the following: 1135923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1136923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1137923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1138923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1139923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1140923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1141923c46f9SKarl O. Pinc disk/part_efi.c 1142923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1143c609719bSwdenk 1144602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1145218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1146923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1147c609719bSwdenk 1148c609719bSwdenk- IDE Reset method: 11494d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 11504d13cbadSwdenk board configurations files but used nowhere! 1151c609719bSwdenk 11524d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 11534d13cbadSwdenk be performed by calling the function 11544d13cbadSwdenk ide_set_reset(int reset) 11554d13cbadSwdenk which has to be defined in a board specific file 1156c609719bSwdenk 1157c609719bSwdenk- ATAPI Support: 1158c609719bSwdenk CONFIG_ATAPI 1159c609719bSwdenk 1160c609719bSwdenk Set this to enable ATAPI support. 1161c609719bSwdenk 1162c40b2956Swdenk- LBA48 Support 1163c40b2956Swdenk CONFIG_LBA48 1164c40b2956Swdenk 1165c40b2956Swdenk Set this to enable support for disks larger than 137GB 11664b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1167c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1168c40b2956Swdenk support disks up to 2.1TB. 1169c40b2956Swdenk 11706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1171c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1172c40b2956Swdenk Default is 32bit. 1173c40b2956Swdenk 1174c609719bSwdenk- SCSI Support: 1175c609719bSwdenk At the moment only there is only support for the 1176c609719bSwdenk SYM53C8XX SCSI controller; define 1177c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1178c609719bSwdenk 11796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 11806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 11816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1182c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1183c609719bSwdenk devices. 11846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1185c609719bSwdenk 1186447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1187447c031bSStefan Reinauer SCSI devices found during the last scan. 1188447c031bSStefan Reinauer 1189c609719bSwdenk- NETWORK Support (PCI): 1190682011ffSwdenk CONFIG_E1000 1191ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1192ce5207e1SKyle Moffett 1193ce5207e1SKyle Moffett CONFIG_E1000_SPI 1194ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1195ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1196ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1197ce5207e1SKyle Moffett 1198ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1199ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1200ce5207e1SKyle Moffett example with the "sspi" command. 1201ce5207e1SKyle Moffett 1202ce5207e1SKyle Moffett CONFIG_CMD_E1000 1203ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1204ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1205682011ffSwdenk 1206ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 120711ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1208ac3315c2SAndre Schwarz 1209c609719bSwdenk CONFIG_EEPRO100 1210c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 121111ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1212c609719bSwdenk write routine for first time initialisation. 1213c609719bSwdenk 1214c609719bSwdenk CONFIG_TULIP 1215c609719bSwdenk Support for Digital 2114x chips. 1216c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1217c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1218c609719bSwdenk 1219c609719bSwdenk CONFIG_NATSEMI 1220c609719bSwdenk Support for National dp83815 chips. 1221c609719bSwdenk 1222c609719bSwdenk CONFIG_NS8382X 1223c609719bSwdenk Support for National dp8382[01] gigabit chips. 1224c609719bSwdenk 122545219c46Swdenk- NETWORK Support (other): 122645219c46Swdenk 1227c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1228c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1229c041e9d2SJens Scharsig 1230c041e9d2SJens Scharsig CONFIG_RMII 1231c041e9d2SJens Scharsig Define this to use reduced MII inteface 1232c041e9d2SJens Scharsig 1233c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1234c041e9d2SJens Scharsig If this defined, the driver is quiet. 1235c041e9d2SJens Scharsig The driver doen't show link status messages. 1236c041e9d2SJens Scharsig 1237efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1238efdd7319SRob Herring Support for the Calxeda XGMAC device 1239efdd7319SRob Herring 12403bb46d23SAshok CONFIG_LAN91C96 124145219c46Swdenk Support for SMSC's LAN91C96 chips. 124245219c46Swdenk 124345219c46Swdenk CONFIG_LAN91C96_BASE 124445219c46Swdenk Define this to hold the physical address 124545219c46Swdenk of the LAN91C96's I/O space 124645219c46Swdenk 124745219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 124845219c46Swdenk Define this to enable 32 bit addressing 124945219c46Swdenk 12503bb46d23SAshok CONFIG_SMC91111 1251f39748aeSwdenk Support for SMSC's LAN91C111 chip 1252f39748aeSwdenk 1253f39748aeSwdenk CONFIG_SMC91111_BASE 1254f39748aeSwdenk Define this to hold the physical address 1255f39748aeSwdenk of the device (I/O space) 1256f39748aeSwdenk 1257f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1258f39748aeSwdenk Define this if data bus is 32 bits 1259f39748aeSwdenk 1260f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1261f39748aeSwdenk Define this to use i/o functions instead of macros 1262f39748aeSwdenk (some hardware wont work with macros) 1263f39748aeSwdenk 1264dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1265dc02badaSHeiko Schocher Support for davinci emac 1266dc02badaSHeiko Schocher 1267dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1268dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1269dc02badaSHeiko Schocher 1270b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1271b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1272b3dbf4a5SMacpaul Lin 1273b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1274b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1275b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1276b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1277b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1278b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1279b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1280b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1281b3dbf4a5SMacpaul Lin 1282c2fff331SMike Rapoport CONFIG_SMC911X 1283557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1284557b377dSJens Gehrlein 1285c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1286557b377dSJens Gehrlein Define this to hold the physical address 1287557b377dSJens Gehrlein of the device (I/O space) 1288557b377dSJens Gehrlein 1289c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1290557b377dSJens Gehrlein Define this if data bus is 32 bits 1291557b377dSJens Gehrlein 1292c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1293557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1294557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1295c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1296557b377dSJens Gehrlein 12973d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 12983d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 12993d0075faSYoshihiro Shimoda 13003d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13013d0075faSYoshihiro Shimoda Define the number of ports to be used 13023d0075faSYoshihiro Shimoda 13033d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13043d0075faSYoshihiro Shimoda Define the ETH PHY's address 13053d0075faSYoshihiro Shimoda 130668260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 130768260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 130868260aabSYoshihiro Shimoda 13095e124724SVadim Bendebury- TPM Support: 131090899cc0SChe-liang Chiou CONFIG_TPM 131190899cc0SChe-liang Chiou Support TPM devices. 131290899cc0SChe-liang Chiou 13131b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13141b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13151b393db5STom Wai-Hong Tam per system is supported at this time. 13161b393db5STom Wai-Hong Tam 13171b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13181b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13191b393db5STom Wai-Hong Tam 13201b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13211b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13221b393db5STom Wai-Hong Tam 13231b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13241b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13251b393db5STom Wai-Hong Tam 1326c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1327c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1328c01939c7SDirk Eibach 132990899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 13305e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 13315e124724SVadim Bendebury per system is supported at this time. 13325e124724SVadim Bendebury 13335e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 13345e124724SVadim Bendebury Base address where the generic TPM device is mapped 13355e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 13365e124724SVadim Bendebury 0xfed40000. 13375e124724SVadim Bendebury 1338be6c1529SReinhard Pfau CONFIG_CMD_TPM 1339be6c1529SReinhard Pfau Add tpm monitor functions. 1340be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1341be6c1529SReinhard Pfau provides monitor access to authorized functions. 1342be6c1529SReinhard Pfau 1343be6c1529SReinhard Pfau CONFIG_TPM 1344be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1345be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1346be6c1529SReinhard Pfau Requires support for a TPM device. 1347be6c1529SReinhard Pfau 1348be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1349be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1350be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1351be6c1529SReinhard Pfau 1352c609719bSwdenk- USB Support: 1353c609719bSwdenk At the moment only the UHCI host controller is 13544d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1355c609719bSwdenk CONFIG_USB_UHCI to enable it. 1356c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 135730d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1358c609719bSwdenk storage devices. 1359c609719bSwdenk Note: 1360c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1361c609719bSwdenk (TEAC FD-05PUB). 13624d13cbadSwdenk MPC5200 USB requires additional defines: 13634d13cbadSwdenk CONFIG_USB_CLOCK 13644d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1365307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1366307ecb6dSEric Millbrandt for USB on PSC3 13674d13cbadSwdenk CONFIG_USB_CONFIG 13684d13cbadSwdenk for differential drivers: 0x00001000 13694d13cbadSwdenk for single ended drivers: 0x00005000 1370307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1371307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 13726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1373fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1374fdcfaa1bSZhang Wei instead of using asynchronous interrupts 13754d13cbadSwdenk 13769ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 13779ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 13789ab4ce22SSimon Glass 1379aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1380aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1381aa155058SKuo-Jung Su 138216c8d5e7SWolfgang Denk- USB Device: 138316c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 138416c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 138516c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 138611ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 138716c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 138816c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 138916c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 139016c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 139116c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 139216c8d5e7SWolfgang Denk a Linux host by 139316c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 139416c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 139516c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 139616c8d5e7SWolfgang Denk might be defined in YourBoardName.h 139716c8d5e7SWolfgang Denk 139816c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 139916c8d5e7SWolfgang Denk Define this to build a UDC device 140016c8d5e7SWolfgang Denk 140116c8d5e7SWolfgang Denk CONFIG_USB_TTY 140216c8d5e7SWolfgang Denk Define this to have a tty type of device available to 140316c8d5e7SWolfgang Denk talk to the UDC device 140416c8d5e7SWolfgang Denk 1405f9da0f89SVipin KUMAR CONFIG_USBD_HS 1406f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1407f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1408f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1409f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1410f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1411f9da0f89SVipin KUMAR speed. 1412f9da0f89SVipin KUMAR 14136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 141416c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 141516c8d5e7SWolfgang Denk be set to usbtty. 141616c8d5e7SWolfgang Denk 141716c8d5e7SWolfgang Denk mpc8xx: 14186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 141916c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 142116c8d5e7SWolfgang Denk 14226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 142316c8d5e7SWolfgang Denk Derive USB clock from brgclk 14246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 142516c8d5e7SWolfgang Denk 142616c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 142716c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 142816c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 142916c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 143016c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 143116c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 143216c8d5e7SWolfgang Denk 143316c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 143416c8d5e7SWolfgang Denk Define this string as the name of your company for 143516c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 143616c8d5e7SWolfgang Denk 143716c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 143816c8d5e7SWolfgang Denk Define this string as the name of your product 143916c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 144016c8d5e7SWolfgang Denk 144116c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 144216c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 144316c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 144416c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 144516c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 144616c8d5e7SWolfgang Denk 144716c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 144816c8d5e7SWolfgang Denk Define this as the unique Product ID 144916c8d5e7SWolfgang Denk for your device 145016c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1451c609719bSwdenk 1452351e9b20SPrzemyslaw Marczak Some USB device drivers may need to check USB cable attachment. 1453351e9b20SPrzemyslaw Marczak In this case you can enable following config in BoardName.h: 1454351e9b20SPrzemyslaw Marczak CONFIG_USB_CABLE_CHECK 1455351e9b20SPrzemyslaw Marczak This enables function definition: 1456351e9b20SPrzemyslaw Marczak - usb_cable_connected() in include/usb.h 1457351e9b20SPrzemyslaw Marczak Implementation of this function is board-specific. 1458351e9b20SPrzemyslaw Marczak 1459d70a560fSIgor Grinberg- ULPI Layer Support: 1460d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1461d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1462d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1463d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1464d70a560fSIgor Grinberg viewport is supported. 1465d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1466d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 14676d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 14686d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 14696d365ea0SLucas Stach the appropriate value in Hz. 1470c609719bSwdenk 1471c609719bSwdenk- MMC Support: 1472c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1473c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1474c609719bSwdenk accessed from the boot prompt by mapping the device 1475c609719bSwdenk to physical memory similar to flash. Command line is 1476602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1477602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1478c609719bSwdenk 1479afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1480afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1481afb35666SYoshihiro Shimoda 1482afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1483afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1484afb35666SYoshihiro Shimoda 1485afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1486afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1487afb35666SYoshihiro Shimoda 1488b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1489b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1490b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1491b3ba6e94STom Rini 1492b3ba6e94STom Rini CONFIG_CMD_DFU 1493b3ba6e94STom Rini This enables the command "dfu" which is used to have 1494b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1495b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1496b3ba6e94STom Rini set and define the alt settings to expose to the host. 1497b3ba6e94STom Rini 1498b3ba6e94STom Rini CONFIG_DFU_MMC 1499b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1500b3ba6e94STom Rini 1501c6631764SPantelis Antoniou CONFIG_DFU_NAND 1502c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1503c6631764SPantelis Antoniou 1504a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1505a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1506a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1507a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1508a9479f04SAfzal Mohammed one that would help mostly the developer. 1509a9479f04SAfzal Mohammed 1510e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1511e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1512e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1513e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1514e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1515e7e75c70SHeiko Schocher 1516ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1517ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1518ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1519ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1520ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1521ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1522ea2453d5SPantelis Antoniou 15236705d81eSwdenk- Journaling Flash filesystem support: 15246705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 15256705d81eSwdenk CONFIG_JFFS2_NAND_DEV 15266705d81eSwdenk Define these for a default partition on a NAND device 15276705d81eSwdenk 15286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 15296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 15306705d81eSwdenk Define these for a default partition on a NOR device 15316705d81eSwdenk 15326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 15336705d81eSwdenk Define this to create an own partition. You have to provide a 15346705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 15356705d81eSwdenk 15366705d81eSwdenk If you define only one JFFS2 partition you may also want to 15376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 15386705d81eSwdenk to disable the command chpart. This is the default when you 15396705d81eSwdenk have not defined a custom partition 15406705d81eSwdenk 1541c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1542c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1543656f4c65SDonggeun Kim 1544656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1545656f4c65SDonggeun Kim file in FAT formatted partition. 1546656f4c65SDonggeun Kim 1547656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1548656f4c65SDonggeun Kim user to write files to FAT. 1549c30a15e5SDonggeun Kim 155084cd9327SGabe BlackCBFS (Coreboot Filesystem) support 155184cd9327SGabe Black CONFIG_CMD_CBFS 155284cd9327SGabe Black 155384cd9327SGabe Black Define this to enable support for reading from a Coreboot 155484cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 155584cd9327SGabe Black and cbfsload. 155684cd9327SGabe Black 1557c609719bSwdenk- Keyboard Support: 1558c609719bSwdenk CONFIG_ISA_KEYBOARD 1559c609719bSwdenk 1560c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1561c609719bSwdenk support 1562c609719bSwdenk 1563c609719bSwdenk CONFIG_I8042_KBD 1564c609719bSwdenk Standard PC keyboard driver with US (is default) and 1565c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1566c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1567c609719bSwdenk for cfb_console. Supports cursor blinking. 1568c609719bSwdenk 1569713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1570713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1571713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1572713cb680SHung-ying Tyan which provides key scans on request. 1573713cb680SHung-ying Tyan 1574c609719bSwdenk- Video support: 1575c609719bSwdenk CONFIG_VIDEO 1576c609719bSwdenk 1577c609719bSwdenk Define this to enable video support (for output to 1578c609719bSwdenk video). 1579c609719bSwdenk 1580c609719bSwdenk CONFIG_VIDEO_CT69000 1581c609719bSwdenk 1582c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1583c609719bSwdenk 1584c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1585eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1586eeb1b77bSwdenk video output is selected via environment 'videoout' 1587eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1588eeb1b77bSwdenk assumed. 1589c609719bSwdenk 1590eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 159111ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1592eeb1b77bSwdenk are possible: 1593eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1594eeb1b77bSwdenk Following standard modes are supported (* is default): 1595eeb1b77bSwdenk 1596eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1597eeb1b77bSwdenk -------------+--------------------------------------------- 1598eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1599eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1600eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1601eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1602eeb1b77bSwdenk -------------+--------------------------------------------- 1603c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1604c609719bSwdenk 1605eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 16067817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1607eeb1b77bSwdenk 1608eeb1b77bSwdenk 1609a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1610a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1611a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1612a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1613a6c7ad2fSwdenk 16147d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 16157d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 16167d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 16177d3053fbSTimur Tabi support, and should also define these other macros: 16187d3053fbSTimur Tabi 16197d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 16207d3053fbSTimur Tabi CONFIG_VIDEO 16217d3053fbSTimur Tabi CONFIG_CMD_BMP 16227d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 16237d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 16247d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 16257d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 16267d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 16277d3053fbSTimur Tabi 1628ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1629ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1630ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1631ba8e76bdSTimur Tabi description of this variable. 16327d3053fbSTimur Tabi 1633058d59b0SSimon Glass CONFIG_VIDEO_VGA 1634058d59b0SSimon Glass 1635058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1636058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1637058d59b0SSimon Glass driver. 1638058d59b0SSimon Glass 1639058d59b0SSimon Glass 1640682011ffSwdenk- Keyboard Support: 1641682011ffSwdenk CONFIG_KEYBOARD 1642682011ffSwdenk 1643682011ffSwdenk Define this to enable a custom keyboard support. 1644682011ffSwdenk This simply calls drv_keyboard_init() which must be 1645682011ffSwdenk defined in your board-specific files. 1646682011ffSwdenk The only board using this so far is RBC823. 1647a6c7ad2fSwdenk 1648c609719bSwdenk- LCD Support: CONFIG_LCD 1649c609719bSwdenk 1650c609719bSwdenk Define this to enable LCD support (for output to LCD 1651c609719bSwdenk display); also select one of the supported displays 1652c609719bSwdenk by defining one of these: 1653c609719bSwdenk 165439cf4804SStelian Pop CONFIG_ATMEL_LCD: 165539cf4804SStelian Pop 165639cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 165739cf4804SStelian Pop 1658fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1659c609719bSwdenk 1660fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1661c609719bSwdenk 1662fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1663c609719bSwdenk 1664fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1665fd3103bbSwdenk Active, color, single scan. 1666fd3103bbSwdenk 1667fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1668fd3103bbSwdenk 1669fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1670c609719bSwdenk Active, color, single scan. 1671c609719bSwdenk 1672c609719bSwdenk CONFIG_SHARP_16x9 1673c609719bSwdenk 1674c609719bSwdenk Sharp 320x240. Active, color, single scan. 1675c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1676c609719bSwdenk 1677c609719bSwdenk CONFIG_SHARP_LQ64D341 1678c609719bSwdenk 1679c609719bSwdenk Sharp LQ64D341 display, 640x480. 1680c609719bSwdenk Active, color, single scan. 1681c609719bSwdenk 1682c609719bSwdenk CONFIG_HLD1045 1683c609719bSwdenk 1684c609719bSwdenk HLD1045 display, 640x480. 1685c609719bSwdenk Active, color, single scan. 1686c609719bSwdenk 1687c609719bSwdenk CONFIG_OPTREX_BW 1688c609719bSwdenk 1689c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1690c609719bSwdenk or 1691c609719bSwdenk Hitachi LMG6912RPFC-00T 1692c609719bSwdenk or 1693c609719bSwdenk Hitachi SP14Q002 1694c609719bSwdenk 1695c609719bSwdenk 320x240. Black & white. 1696c609719bSwdenk 1697c609719bSwdenk Normally display is black on white background; define 16986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1699c609719bSwdenk 1700676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1701676d319eSSimon Glass 1702676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1703676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1704676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1705676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1706676d319eSSimon Glass a per-section basis. 1707676d319eSSimon Glass 17080d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 17090d89efefSSimon Glass 17100d89efefSSimon Glass When the console need to be scrolled, this is the number of 17110d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 17120d89efefSSimon Glass the console jump but can help speed up operation when scrolling 17130d89efefSSimon Glass is slow. 1714676d319eSSimon Glass 171545d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 171645d7f525STom Wai-Hong Tam 171745d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 171845d7f525STom Wai-Hong Tam 1719735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1720735987c5STom Wai-Hong Tam 1721735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1722735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1723735987c5STom Wai-Hong Tam 17247152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1725d791b1dcSwdenk 1726d791b1dcSwdenk If this option is set, the environment is checked for 1727d791b1dcSwdenk a variable "splashimage". If found, the usual display 1728d791b1dcSwdenk of logo, copyright and system information on the LCD 1729e94d2cd9Swdenk is suppressed and the BMP image at the address 1730d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1731d791b1dcSwdenk console is redirected to the "nulldev", too. This 1732d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1733d791b1dcSwdenk loaded very quickly after power-on. 1734d791b1dcSwdenk 1735c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1736c0880485SNikita Kiryanov 1737c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1738c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 1739c0880485SNikita Kiryanov (see README.displaying-bmps and README.arm-unaligned-accesses). 1740c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1741c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1742c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1743c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1744c0880485SNikita Kiryanov there is no need to set this option. 1745c0880485SNikita Kiryanov 17461ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 17471ca298ceSMatthias Weisser 17481ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 17491ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 17501ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 17511ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 17521ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 17531ca298ceSMatthias Weisser specify 'm' for centering the image. 17541ca298ceSMatthias Weisser 17551ca298ceSMatthias Weisser Example: 17561ca298ceSMatthias Weisser setenv splashpos m,m 17571ca298ceSMatthias Weisser => image at center of screen 17581ca298ceSMatthias Weisser 17591ca298ceSMatthias Weisser setenv splashpos 30,20 17601ca298ceSMatthias Weisser => image at x = 30 and y = 20 17611ca298ceSMatthias Weisser 17621ca298ceSMatthias Weisser setenv splashpos -10,m 17631ca298ceSMatthias Weisser => vertically centered image 17641ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 17651ca298ceSMatthias Weisser 176698f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 176798f4a3dfSStefan Roese 176898f4a3dfSStefan Roese If this option is set, additionally to standard BMP 176998f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 177098f4a3dfSStefan Roese splashscreen support or the bmp command. 177198f4a3dfSStefan Roese 1772d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1773d5011762SAnatolij Gustschin 1774d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1775d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1776d5011762SAnatolij Gustschin bmp command. 1777d5011762SAnatolij Gustschin 1778f2b96dfbSLei Wen- Do compresssing for memory range: 1779f2b96dfbSLei Wen CONFIG_CMD_ZIP 1780f2b96dfbSLei Wen 1781f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1782f2b96dfbSLei Wen to compress the specified memory at its best effort. 1783f2b96dfbSLei Wen 1784c29fdfc1Swdenk- Compression support: 17858ef70478SKees Cook CONFIG_GZIP 17868ef70478SKees Cook 17878ef70478SKees Cook Enabled by default to support gzip compressed images. 17888ef70478SKees Cook 1789c29fdfc1Swdenk CONFIG_BZIP2 1790c29fdfc1Swdenk 1791c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1792c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1793c29fdfc1Swdenk compressed images are supported. 1794c29fdfc1Swdenk 1795c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 17966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1797c29fdfc1Swdenk be at least 4MB. 1798d791b1dcSwdenk 1799fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1800fc9c1727SLuigi 'Comio' Mantellini 1801fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1802fc9c1727SLuigi 'Comio' Mantellini images is included. 1803fc9c1727SLuigi 'Comio' Mantellini 1804fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1805fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1806fc9c1727SLuigi 'Comio' Mantellini formula: 1807fc9c1727SLuigi 'Comio' Mantellini 1808fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1809fc9c1727SLuigi 'Comio' Mantellini 1810fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1811fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1812fc9c1727SLuigi 'Comio' Mantellini 1813fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1814fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1815fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1816fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1817fc9c1727SLuigi 'Comio' Mantellini 1818fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1819fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 18206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1821fc9c1727SLuigi 'Comio' Mantellini 18228ef70478SKees Cook CONFIG_LZO 18238ef70478SKees Cook 18248ef70478SKees Cook If this option is set, support for LZO compressed images 18258ef70478SKees Cook is included. 18268ef70478SKees Cook 182717ea1177Swdenk- MII/PHY support: 182817ea1177Swdenk CONFIG_PHY_ADDR 182917ea1177Swdenk 183017ea1177Swdenk The address of PHY on MII bus. 183117ea1177Swdenk 183217ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 183317ea1177Swdenk 183417ea1177Swdenk The clock frequency of the MII bus 183517ea1177Swdenk 183617ea1177Swdenk CONFIG_PHY_GIGE 183717ea1177Swdenk 183817ea1177Swdenk If this option is set, support for speed/duplex 183911ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 184017ea1177Swdenk 184117ea1177Swdenk CONFIG_PHY_RESET_DELAY 184217ea1177Swdenk 184317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 184417ea1177Swdenk reset before any MII register access is possible. 184517ea1177Swdenk For such PHY, set this option to the usec delay 184617ea1177Swdenk required. (minimum 300usec for LXT971A) 184717ea1177Swdenk 184817ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 184917ea1177Swdenk 185017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 185117ea1177Swdenk command issued before MII status register can be read 185217ea1177Swdenk 1853c609719bSwdenk- Ethernet address: 1854c609719bSwdenk CONFIG_ETHADDR 1855c68a05feSrichardretanubun CONFIG_ETH1ADDR 1856c609719bSwdenk CONFIG_ETH2ADDR 1857c609719bSwdenk CONFIG_ETH3ADDR 1858c68a05feSrichardretanubun CONFIG_ETH4ADDR 1859c68a05feSrichardretanubun CONFIG_ETH5ADDR 1860c609719bSwdenk 186111ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 186211ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1863c609719bSwdenk is not determined automatically. 1864c609719bSwdenk 1865c609719bSwdenk- IP address: 1866c609719bSwdenk CONFIG_IPADDR 1867c609719bSwdenk 1868c609719bSwdenk Define a default value for the IP address to use for 186911ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1870c609719bSwdenk determined through e.g. bootp. 18711ebcd654SWolfgang Denk (Environment variable "ipaddr") 1872c609719bSwdenk 1873c609719bSwdenk- Server IP address: 1874c609719bSwdenk CONFIG_SERVERIP 1875c609719bSwdenk 1876c609719bSwdenk Defines a default value for the IP address of a TFTP 1877c609719bSwdenk server to contact when using the "tftboot" command. 18781ebcd654SWolfgang Denk (Environment variable "serverip") 1879c609719bSwdenk 188097cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 188197cfe861SRobin Getz 188297cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 188397cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 188497cfe861SRobin Getz 18851ebcd654SWolfgang Denk- Gateway IP address: 18861ebcd654SWolfgang Denk CONFIG_GATEWAYIP 18871ebcd654SWolfgang Denk 18881ebcd654SWolfgang Denk Defines a default value for the IP address of the 18891ebcd654SWolfgang Denk default router where packets to other networks are 18901ebcd654SWolfgang Denk sent to. 18911ebcd654SWolfgang Denk (Environment variable "gatewayip") 18921ebcd654SWolfgang Denk 18931ebcd654SWolfgang Denk- Subnet mask: 18941ebcd654SWolfgang Denk CONFIG_NETMASK 18951ebcd654SWolfgang Denk 18961ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 18971ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 18981ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 18991ebcd654SWolfgang Denk forwarded through a router. 19001ebcd654SWolfgang Denk (Environment variable "netmask") 19011ebcd654SWolfgang Denk 190253a5c424SDavid Updegraff- Multicast TFTP Mode: 190353a5c424SDavid Updegraff CONFIG_MCAST_TFTP 190453a5c424SDavid Updegraff 190553a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 190653a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 190711ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 190853a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 190953a5c424SDavid Updegraff multicast group. 191053a5c424SDavid Updegraff 1911c609719bSwdenk- BOOTP Recovery Mode: 1912c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1913c609719bSwdenk 1914c609719bSwdenk If you have many targets in a network that try to 1915c609719bSwdenk boot using BOOTP, you may want to avoid that all 1916c609719bSwdenk systems send out BOOTP requests at precisely the same 1917c609719bSwdenk moment (which would happen for instance at recovery 1918c609719bSwdenk from a power failure, when all systems will try to 1919c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1920c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1921c609719bSwdenk inserted before sending out BOOTP requests. The 19226c33c785SWolfgang Denk following delays are inserted then: 1923c609719bSwdenk 1924c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1925c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1926c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1927c609719bSwdenk 4th and following 1928c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1929c609719bSwdenk 1930fe389a82Sstroese- DHCP Advanced Options: 19311fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 19321fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1933fe389a82Sstroese 19341fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 19351fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 19361fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 19371fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 19381fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 19391fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 19401fe80d79SJon Loeliger CONFIG_BOOTP_DNS 19411fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 19421fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 19431fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 19441fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 19451fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 19462c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1947fe389a82Sstroese 19485d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 19495d110f0aSWilson Callan environment variable, not the BOOTP server. 1950fe389a82Sstroese 19512c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 19522c00e099SJoe Hershberger after the configured retry count, the call will fail 19532c00e099SJoe Hershberger instead of starting over. This can be used to fail over 19542c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 19552c00e099SJoe Hershberger is not available. 19562c00e099SJoe Hershberger 1957fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1958fe389a82Sstroese serverip from a DHCP server, it is possible that more 1959fe389a82Sstroese than one DNS serverip is offered to the client. 1960fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1961fe389a82Sstroese serverip will be stored in the additional environment 1962fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1963fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 19641fe80d79SJon Loeliger is defined. 1965fe389a82Sstroese 1966fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1967fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1968fe389a82Sstroese need the hostname of the DHCP requester. 19695d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 19701fe80d79SJon Loeliger of the "hostname" environment variable is passed as 19711fe80d79SJon Loeliger option 12 to the DHCP server. 1972fe389a82Sstroese 1973d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1974d9a2f416SAras Vaichas 1975d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1976d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1977d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1978d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1979d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1980d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1981d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1982d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1983d9a2f416SAras Vaichas that one of the retries will be successful but note that 1984d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1985d9a2f416SAras Vaichas this delay. 1986d9a2f416SAras Vaichas 1987d22c338eSJoe Hershberger - Link-local IP address negotiation: 1988d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1989d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1990d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1991d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1992d22c338eSJoe Hershberger 1993d22c338eSJoe Hershberger See doc/README.link-local for more information. 1994d22c338eSJoe Hershberger 1995a3d991bdSwdenk - CDP Options: 1996a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1997a3d991bdSwdenk 1998a3d991bdSwdenk The device id used in CDP trigger frames. 1999a3d991bdSwdenk 2000a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2001a3d991bdSwdenk 2002a3d991bdSwdenk A two character string which is prefixed to the MAC address 2003a3d991bdSwdenk of the device. 2004a3d991bdSwdenk 2005a3d991bdSwdenk CONFIG_CDP_PORT_ID 2006a3d991bdSwdenk 2007a3d991bdSwdenk A printf format string which contains the ascii name of 2008a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 200911ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2010a3d991bdSwdenk 2011a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2012a3d991bdSwdenk 2013a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2014a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2015a3d991bdSwdenk 2016a3d991bdSwdenk CONFIG_CDP_VERSION 2017a3d991bdSwdenk 2018a3d991bdSwdenk An ascii string containing the version of the software. 2019a3d991bdSwdenk 2020a3d991bdSwdenk CONFIG_CDP_PLATFORM 2021a3d991bdSwdenk 2022a3d991bdSwdenk An ascii string containing the name of the platform. 2023a3d991bdSwdenk 2024a3d991bdSwdenk CONFIG_CDP_TRIGGER 2025a3d991bdSwdenk 2026a3d991bdSwdenk A 32bit integer sent on the trigger. 2027a3d991bdSwdenk 2028a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2029a3d991bdSwdenk 2030a3d991bdSwdenk A 16bit integer containing the power consumption of the 2031a3d991bdSwdenk device in .1 of milliwatts. 2032a3d991bdSwdenk 2033a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2034a3d991bdSwdenk 2035a3d991bdSwdenk A byte containing the id of the VLAN. 2036a3d991bdSwdenk 2037c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2038c609719bSwdenk 2039c609719bSwdenk Several configurations allow to display the current 2040c609719bSwdenk status using a LED. For instance, the LED will blink 2041c609719bSwdenk fast while running U-Boot code, stop blinking as 2042c609719bSwdenk soon as a reply to a BOOTP request was received, and 2043c609719bSwdenk start blinking slow once the Linux kernel is running 2044c609719bSwdenk (supported by a status LED driver in the Linux 2045c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2046c609719bSwdenk feature in U-Boot. 2047c609719bSwdenk 20481df7bbbaSIgor Grinberg Additional options: 20491df7bbbaSIgor Grinberg 20501df7bbbaSIgor Grinberg CONFIG_GPIO_LED 20511df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 20521df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 20531df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 20541df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 20551df7bbbaSIgor Grinberg 20569dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 20579dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 20589dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 20599dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 20609dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 20619dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 20629dfdcdfeSIgor Grinberg 2063c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2064c609719bSwdenk 2065c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2066c609719bSwdenk on those systems that support this (optional) 2067c609719bSwdenk feature, like the TQM8xxL modules. 2068c609719bSwdenk 20693f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2070c609719bSwdenk 20713f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 20723f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 20733f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 20743f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 20753f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 20763f4978c7SHeiko Schocher interface. 20773f4978c7SHeiko Schocher 20783f4978c7SHeiko Schocher ported i2c driver to the new framework: 2079ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2080ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2081ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2082ea818dbbSHeiko Schocher for defining speed and slave address 2083ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2084ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2085ea818dbbSHeiko Schocher for defining speed and slave address 2086ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2087ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2088ea818dbbSHeiko Schocher for defining speed and slave address 2089ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2090ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2091ea818dbbSHeiko Schocher for defining speed and slave address 20923f4978c7SHeiko Schocher 209300f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 209400f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 209500f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 209600f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 209700f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 209800f792e0SHeiko Schocher bus. 209900f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 210000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 210100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 210200f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 210300f792e0SHeiko Schocher second bus. 210400f792e0SHeiko Schocher 21051f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 21061f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 21071f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 21081f2ba722SSimon Glass 100000 and the slave addr 0! 21091f2ba722SSimon Glass 2110880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2111880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2112880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2113880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2114880540deSDirk Eibach 2115fac96408Strem - drivers/i2c/i2c_mxc.c 2116fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2117fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2118fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2119fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2120fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2121fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2122fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2123fac96408Strem If thoses defines are not set, default value is 100000 2124fac96408Strem for speed, and 0 for slave. 2125fac96408Strem 21261086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 21271086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 21281086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 21291086bfa9SNobuhiro Iwamatsu 21301086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 21311086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 21321086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 21331086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 21341086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 21351086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 21361086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 21371086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 21381086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 21391086bfa9SNobuhiro Iwamatsu 21402035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 21412035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 21422035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 21432035d77dSNobuhiro Iwamatsu 21442035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 21452035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 21462035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 21472035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 21482035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 21492035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 21502035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 21512035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 21522035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 21532035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 21542035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 21552035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 21562035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 21572035d77dSNobuhiro Iwamatsu 21586789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 21596789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 21606789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 21616789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 21626789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 21636789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 21646789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 21656789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 21666789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 21676789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 21686789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 21696789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 21706789e84eSHeiko Schocher 21710bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 21720bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 21730bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 21740bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 21750bdffe71SHeiko Schocher 2176e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2177e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2178e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2179e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2180e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2181e717fc6dSNaveen Krishna Ch 21823f4978c7SHeiko Schocher additional defines: 21833f4978c7SHeiko Schocher 21843f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 21853f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 21863f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 21873f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 21883f4978c7SHeiko Schocher omit this define. 21893f4978c7SHeiko Schocher 21903f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 21913f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 21923f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 21933f4978c7SHeiko Schocher omit this define. 21943f4978c7SHeiko Schocher 21953f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 21963f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 21973f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 21983f4978c7SHeiko Schocher define. 21993f4978c7SHeiko Schocher 22003f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 22013f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 22023f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 22033f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 22043f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 22053f4978c7SHeiko Schocher 22063f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 22073f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 22083f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 22093f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 22103f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 22113f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 22123f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 22133f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 22143f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 22153f4978c7SHeiko Schocher } 22163f4978c7SHeiko Schocher 22173f4978c7SHeiko Schocher which defines 22183f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2219ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2220ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2221ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2222ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2223ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 22243f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2225ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2226ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 22273f4978c7SHeiko Schocher 22283f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 22293f4978c7SHeiko Schocher 2230ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 22313f4978c7SHeiko Schocher 22323f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 22333f4978c7SHeiko Schocher provides the following compelling advantages: 22343f4978c7SHeiko Schocher 22353f4978c7SHeiko Schocher - more than one i2c adapter is usable 22363f4978c7SHeiko Schocher - approved multibus support 22373f4978c7SHeiko Schocher - better i2c mux support 22383f4978c7SHeiko Schocher 22393f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 22403f4978c7SHeiko Schocher 2241ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2242ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2243ea818dbbSHeiko Schocher for the selected CPU. 2244c609719bSwdenk 2245b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2246602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2247b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2248b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2249c609719bSwdenk command line interface. 2250c609719bSwdenk 2251bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2252c609719bSwdenk 2253b37c7e5eSwdenk There are several other quantities that must also be 2254ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2255c609719bSwdenk 22566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2257b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 22586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 225911ccc33fSMarcel Ziswiler the CPU's i2c node address). 2260c609719bSwdenk 22618d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2262a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 22638d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 22648d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 22658d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2266b37c7e5eSwdenk 22675da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 22685da71efaSEric Millbrandt 22695da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 22705da71efaSEric Millbrandt chips might think that the current transfer is still 22715da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 22725da71efaSEric Millbrandt commands until the slave device responds. 22735da71efaSEric Millbrandt 2274b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2275b37c7e5eSwdenk 2276ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2277b37c7e5eSwdenk then the following macros need to be defined (examples are 2278b37c7e5eSwdenk from include/configs/lwmon.h): 2279c609719bSwdenk 2280c609719bSwdenk I2C_INIT 2281c609719bSwdenk 2282b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2283c609719bSwdenk controller or configure ports. 2284c609719bSwdenk 2285b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2286b37c7e5eSwdenk 2287c609719bSwdenk I2C_PORT 2288c609719bSwdenk 2289c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2290c609719bSwdenk assumes both bits are on the same port). Valid values 2291c609719bSwdenk are 0..3 for ports A..D. 2292c609719bSwdenk 2293c609719bSwdenk I2C_ACTIVE 2294c609719bSwdenk 2295c609719bSwdenk The code necessary to make the I2C data line active 2296c609719bSwdenk (driven). If the data line is open collector, this 2297c609719bSwdenk define can be null. 2298c609719bSwdenk 2299b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2300b37c7e5eSwdenk 2301c609719bSwdenk I2C_TRISTATE 2302c609719bSwdenk 2303c609719bSwdenk The code necessary to make the I2C data line tri-stated 2304c609719bSwdenk (inactive). If the data line is open collector, this 2305c609719bSwdenk define can be null. 2306c609719bSwdenk 2307b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2308b37c7e5eSwdenk 2309c609719bSwdenk I2C_READ 2310c609719bSwdenk 2311472d5460SYork Sun Code that returns true if the I2C data line is high, 2312472d5460SYork Sun false if it is low. 2313c609719bSwdenk 2314b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2315b37c7e5eSwdenk 2316c609719bSwdenk I2C_SDA(bit) 2317c609719bSwdenk 2318472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2319472d5460SYork Sun is false, it clears it (low). 2320c609719bSwdenk 2321b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2322b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2323b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2324b37c7e5eSwdenk 2325c609719bSwdenk I2C_SCL(bit) 2326c609719bSwdenk 2327472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2328472d5460SYork Sun is false, it clears it (low). 2329c609719bSwdenk 2330b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2331b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2332b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2333b37c7e5eSwdenk 2334c609719bSwdenk I2C_DELAY 2335c609719bSwdenk 2336c609719bSwdenk This delay is invoked four times per clock cycle so this 2337c609719bSwdenk controls the rate of data transfer. The data rate thus 2338b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2339b37c7e5eSwdenk like: 2340b37c7e5eSwdenk 2341b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2342c609719bSwdenk 2343793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2344793b5726SMike Frysinger 2345793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2346793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2347793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2348793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2349793b5726SMike Frysinger 2350793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2351793b5726SMike Frysinger the generic GPIO functions. 2352793b5726SMike Frysinger 23536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 235447cd00faSwdenk 235547cd00faSwdenk When a board is reset during an i2c bus transfer 235647cd00faSwdenk chips might think that the current transfer is still 235747cd00faSwdenk in progress. On some boards it is possible to access 235847cd00faSwdenk the i2c SCLK line directly, either by using the 235947cd00faSwdenk processor pin as a GPIO or by having a second pin 236047cd00faSwdenk connected to the bus. If this option is defined a 236147cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 236247cd00faSwdenk is run early in the boot sequence. 236347cd00faSwdenk 236426a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 236526a33504SRichard Retanubun 236626a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 236726a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 236826a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 236926a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 237026a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 237126a33504SRichard Retanubun controller provide such a method. It is called at the end of 237226a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 237326a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 237426a33504SRichard Retanubun 237517ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 237617ea1177Swdenk 237717ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 237817ea1177Swdenk in u-boot bd_info structure based on u-boot environment 237917ea1177Swdenk variable "i2cfast". (see also i2cfast) 238017ea1177Swdenk 2381bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2382bb99ad6dSBen Warren 2383bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2384bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2385bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2386bb99ad6dSBen Warren Note that bus numbering is zero-based. 2387bb99ad6dSBen Warren 23886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2389bb99ad6dSBen Warren 2390bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 23910f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 23920f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 23930f89c54bSPeter Tyser a 1D array of device addresses 2394bb99ad6dSBen Warren 2395bb99ad6dSBen Warren e.g. 2396bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 23976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2398bb99ad6dSBen Warren 2399bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2400bb99ad6dSBen Warren 2401bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 24026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2403bb99ad6dSBen Warren 2404bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2405bb99ad6dSBen Warren 24066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2407be5e6181STimur Tabi 2408be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2409be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2410be5e6181STimur Tabi 24116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 24120dc018ecSStefan Roese 24130dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 24140dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 24150dc018ecSStefan Roese 24166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 24170dc018ecSStefan Roese 24180dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 24190dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 24200dc018ecSStefan Roese 24216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 24229ebbb54fSVictor Gallardo 24239ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 24249ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 24259ebbb54fSVictor Gallardo specified DTT device. 24269ebbb54fSVictor Gallardo 24272ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 24282ac6985aSAndrew Dyer 24292ac6985aSAndrew Dyer defining this will force the i2c_read() function in 24302ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 24312ac6985aSAndrew Dyer between writing the address pointer and reading the 24322ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 24332ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 24342ac6985aSAndrew Dyer devices can use either method, but some require one or 24352ac6985aSAndrew Dyer the other. 2436be5e6181STimur Tabi 2437c609719bSwdenk- SPI Support: CONFIG_SPI 2438c609719bSwdenk 2439c609719bSwdenk Enables SPI driver (so far only tested with 2440c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2441c609719bSwdenk D/As on the SACSng board) 2442c609719bSwdenk 24436639562eSYoshihiro Shimoda CONFIG_SH_SPI 24446639562eSYoshihiro Shimoda 24456639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 24466639562eSYoshihiro Shimoda only SH7757 is supported. 24476639562eSYoshihiro Shimoda 2448c609719bSwdenk CONFIG_SPI_X 2449c609719bSwdenk 2450c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2451c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2452c609719bSwdenk 2453c609719bSwdenk CONFIG_SOFT_SPI 2454c609719bSwdenk 2455c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2456c609719bSwdenk using hardware support. This is a general purpose 2457c609719bSwdenk driver that only requires three general I/O port pins 2458c609719bSwdenk (two outputs, one input) to function. If this is 2459c609719bSwdenk defined, the board configuration must define several 2460c609719bSwdenk SPI configuration items (port pins to use, etc). For 2461c609719bSwdenk an example, see include/configs/sacsng.h. 2462c609719bSwdenk 246304a9e118SBen Warren CONFIG_HARD_SPI 246404a9e118SBen Warren 246504a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 246604a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 246704a9e118SBen Warren must define a list of chip-select function pointers. 246804a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 246904a9e118SBen Warren example, see include/configs/mpc8349emds.h. 247004a9e118SBen Warren 247138254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 247238254f45SGuennadi Liakhovetski 247338254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 24742e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 247538254f45SGuennadi Liakhovetski 24760133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 24770133502eSMatthias Fuchs 24780133502eSMatthias Fuchs Enables FPGA subsystem. 24790133502eSMatthias Fuchs 24800133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 24810133502eSMatthias Fuchs 24820133502eSMatthias Fuchs Enables support for specific chip vendors. 24830133502eSMatthias Fuchs (ALTERA, XILINX) 24840133502eSMatthias Fuchs 24850133502eSMatthias Fuchs CONFIG_FPGA_<family> 24860133502eSMatthias Fuchs 24870133502eSMatthias Fuchs Enables support for FPGA family. 24880133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 24890133502eSMatthias Fuchs 24900133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2491c609719bSwdenk 2492c609719bSwdenk Specify the number of FPGA devices to support. 2493c609719bSwdenk 24946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2495c609719bSwdenk 2496c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2497c609719bSwdenk 24986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2499c609719bSwdenk 2500c609719bSwdenk Enable checks on FPGA configuration interface busy 2501c609719bSwdenk status by the configuration function. This option 2502c609719bSwdenk will require a board or device specific function to 2503c609719bSwdenk be written. 2504c609719bSwdenk 2505c609719bSwdenk CONFIG_FPGA_DELAY 2506c609719bSwdenk 2507c609719bSwdenk If defined, a function that provides delays in the FPGA 2508c609719bSwdenk configuration driver. 2509c609719bSwdenk 25106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2511c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2512c609719bSwdenk 25136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2514c609719bSwdenk 2515c609719bSwdenk Check for configuration errors during FPGA bitfile 2516c609719bSwdenk loading. For example, abort during Virtex II 2517c609719bSwdenk configuration if the INIT_B line goes low (which 2518c609719bSwdenk indicated a CRC error). 2519c609719bSwdenk 25206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2521c609719bSwdenk 2522c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2523c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2524c609719bSwdenk FPGA configuration sequence. The default time is 500 252511ccc33fSMarcel Ziswiler ms. 2526c609719bSwdenk 25276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2528c609719bSwdenk 2529c609719bSwdenk Maximum time to wait for BUSY to deassert during 253011ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2531c609719bSwdenk 25326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2533c609719bSwdenk 2534c609719bSwdenk Time to wait after FPGA configuration. The default is 253511ccc33fSMarcel Ziswiler 200 ms. 2536c609719bSwdenk 2537c609719bSwdenk- Configuration Management: 2538c609719bSwdenk CONFIG_IDENT_STRING 2539c609719bSwdenk 2540c609719bSwdenk If defined, this string will be added to the U-Boot 2541c609719bSwdenk version information (U_BOOT_VERSION) 2542c609719bSwdenk 2543c609719bSwdenk- Vendor Parameter Protection: 2544c609719bSwdenk 2545c609719bSwdenk U-Boot considers the values of the environment 2546c609719bSwdenk variables "serial#" (Board Serial Number) and 25477152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2548c609719bSwdenk are set once by the board vendor / manufacturer, and 2549c609719bSwdenk protects these variables from casual modification by 2550c609719bSwdenk the user. Once set, these variables are read-only, 2551c609719bSwdenk and write or delete attempts are rejected. You can 255211ccc33fSMarcel Ziswiler change this behaviour: 2553c609719bSwdenk 2554c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2555c609719bSwdenk file, the write protection for vendor parameters is 255647cd00faSwdenk completely disabled. Anybody can change or delete 2557c609719bSwdenk these parameters. 2558c609719bSwdenk 2559c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2560c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 256111ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2562c609719bSwdenk which can be changed exactly ONCE by the user. [The 2563c609719bSwdenk serial# is unaffected by this, i. e. it remains 2564c609719bSwdenk read-only.] 2565c609719bSwdenk 25662598090bSJoe Hershberger The same can be accomplished in a more flexible way 25672598090bSJoe Hershberger for any variable by configuring the type of access 25682598090bSJoe Hershberger to allow for those variables in the ".flags" variable 25692598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 25702598090bSJoe Hershberger 2571c609719bSwdenk- Protected RAM: 2572c609719bSwdenk CONFIG_PRAM 2573c609719bSwdenk 2574c609719bSwdenk Define this variable to enable the reservation of 2575c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2576c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2577c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2578c609719bSwdenk this default value by defining an environment 2579c609719bSwdenk variable "pram" to the number of kB you want to 2580c609719bSwdenk reserve. Note that the board info structure will 2581c609719bSwdenk still show the full amount of RAM. If pRAM is 2582c609719bSwdenk reserved, a new environment variable "mem" will 2583c609719bSwdenk automatically be defined to hold the amount of 2584c609719bSwdenk remaining RAM in a form that can be passed as boot 2585c609719bSwdenk argument to Linux, for instance like that: 2586c609719bSwdenk 2587fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2588c609719bSwdenk saveenv 2589c609719bSwdenk 2590c609719bSwdenk This way you can tell Linux not to use this memory, 2591c609719bSwdenk either, which results in a memory region that will 2592c609719bSwdenk not be affected by reboots. 2593c609719bSwdenk 2594c609719bSwdenk *WARNING* If your board configuration uses automatic 2595c609719bSwdenk detection of the RAM size, you must make sure that 2596c609719bSwdenk this memory test is non-destructive. So far, the 2597c609719bSwdenk following board configurations are known to be 2598c609719bSwdenk "pRAM-clean": 2599c609719bSwdenk 26001b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 26011b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2602544d97e9SWolfgang Denk FLAGADM, TQM8260 2603c609719bSwdenk 260440fef049SGabe Black- Access to physical memory region (> 4GB) 260540fef049SGabe Black Some basic support is provided for operations on memory not 260640fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 260740fef049SGabe Black support access to more than 4GB of memory on 32-bit 260840fef049SGabe Black machines using physical address extension or similar. 260940fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 261040fef049SGabe Black currently only supports clearing the memory. 261140fef049SGabe Black 2612c609719bSwdenk- Error Recovery: 2613c609719bSwdenk CONFIG_PANIC_HANG 2614c609719bSwdenk 2615c609719bSwdenk Define this variable to stop the system in case of a 2616c609719bSwdenk fatal error, so that you have to reset it manually. 2617c609719bSwdenk This is probably NOT a good idea for an embedded 261811ccc33fSMarcel Ziswiler system where you want the system to reboot 2619c609719bSwdenk automatically as fast as possible, but it may be 2620c609719bSwdenk useful during development since you can try to debug 2621c609719bSwdenk the conditions that lead to the situation. 2622c609719bSwdenk 2623c609719bSwdenk CONFIG_NET_RETRY_COUNT 2624c609719bSwdenk 2625c609719bSwdenk This variable defines the number of retries for 2626c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2627c609719bSwdenk before giving up the operation. If not defined, a 2628c609719bSwdenk default value of 5 is used. 2629c609719bSwdenk 263040cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 263140cb90eeSGuennadi Liakhovetski 263240cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 263340cb90eeSGuennadi Liakhovetski 263448a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 263548a3e999STetsuyuki Kobayashi 263648a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 263748a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 263848a3e999STetsuyuki Kobayashi try longer timeout such as 263948a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 264048a3e999STetsuyuki Kobayashi 2641c609719bSwdenk- Command Interpreter: 26428078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 264304a85b3bSwdenk 264404a85b3bSwdenk Enable auto completion of commands using TAB. 264504a85b3bSwdenk 26468078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 26478078f1a5SWolfgang Denk for the "hush" shell. 26488078f1a5SWolfgang Denk 26498078f1a5SWolfgang Denk 26506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2651c609719bSwdenk 2652c609719bSwdenk Define this variable to enable the "hush" shell (from 2653c609719bSwdenk Busybox) as command line interpreter, thus enabling 2654c609719bSwdenk powerful command line syntax like 2655c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2656c609719bSwdenk constructs ("shell scripts"). 2657c609719bSwdenk 2658c609719bSwdenk If undefined, you get the old, much simpler behaviour 2659c609719bSwdenk with a somewhat smaller memory footprint. 2660c609719bSwdenk 2661c609719bSwdenk 26626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2663c609719bSwdenk 2664c609719bSwdenk This defines the secondary prompt string, which is 2665c609719bSwdenk printed when the command interpreter needs more input 2666c609719bSwdenk to complete a command. Usually "> ". 2667c609719bSwdenk 2668c609719bSwdenk Note: 2669c609719bSwdenk 2670c609719bSwdenk In the current implementation, the local variables 2671c609719bSwdenk space and global environment variables space are 2672c609719bSwdenk separated. Local variables are those you define by 26733b57fe0aSwdenk simply typing `name=value'. To access a local 2674c609719bSwdenk variable later on, you have write `$name' or 26753b57fe0aSwdenk `${name}'; to execute the contents of a variable 26763b57fe0aSwdenk directly type `$name' at the command prompt. 2677c609719bSwdenk 2678c609719bSwdenk Global environment variables are those you use 2679c609719bSwdenk setenv/printenv to work with. To run a command stored 2680c609719bSwdenk in such a variable, you need to use the run command, 2681c609719bSwdenk and you must not use the '$' sign to access them. 2682c609719bSwdenk 2683c609719bSwdenk To store commands and special characters in a 2684c609719bSwdenk variable, please use double quotation marks 2685c609719bSwdenk surrounding the whole text of the variable, instead 2686c609719bSwdenk of the backslashes before semicolons and special 2687c609719bSwdenk symbols. 2688c609719bSwdenk 2689aa0c71acSWolfgang Denk- Commandline Editing and History: 2690aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2691aa0c71acSWolfgang Denk 269211ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2693aa0c71acSWolfgang Denk commandline input operations 2694aa0c71acSWolfgang Denk 2695a8c7c708Swdenk- Default Environment: 2696c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2697c609719bSwdenk 2698c609719bSwdenk Define this to contain any number of null terminated 2699c609719bSwdenk strings (variable = value pairs) that will be part of 27007152b1d0Swdenk the default environment compiled into the boot image. 27012262cfeeSwdenk 2702c609719bSwdenk For example, place something like this in your 2703c609719bSwdenk board's config file: 2704c609719bSwdenk 2705c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2706c609719bSwdenk "myvar1=value1\0" \ 2707c609719bSwdenk "myvar2=value2\0" 2708c609719bSwdenk 2709c609719bSwdenk Warning: This method is based on knowledge about the 2710c609719bSwdenk internal format how the environment is stored by the 27112262cfeeSwdenk U-Boot code. This is NOT an official, exported 2712c609719bSwdenk interface! Although it is unlikely that this format 27137152b1d0Swdenk will change soon, there is no guarantee either. 2714c609719bSwdenk You better know what you are doing here. 2715c609719bSwdenk 2716c609719bSwdenk Note: overly (ab)use of the default environment is 2717c609719bSwdenk discouraged. Make sure to check other ways to preset 271874de7aefSWolfgang Denk the environment like the "source" command or the 2719c609719bSwdenk boot command first. 2720c609719bSwdenk 27215e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 27225e724ca2SStephen Warren 27235e724ca2SStephen Warren Define this in order to add variables describing the 27245e724ca2SStephen Warren U-Boot build configuration to the default environment. 27255e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 27265e724ca2SStephen Warren 27275e724ca2SStephen Warren Enabling this option will cause the following to be defined: 27285e724ca2SStephen Warren 27295e724ca2SStephen Warren - CONFIG_SYS_ARCH 27305e724ca2SStephen Warren - CONFIG_SYS_CPU 27315e724ca2SStephen Warren - CONFIG_SYS_BOARD 27325e724ca2SStephen Warren - CONFIG_SYS_VENDOR 27335e724ca2SStephen Warren - CONFIG_SYS_SOC 27345e724ca2SStephen Warren 27357e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 27367e27f89fSTom Rini 27377e27f89fSTom Rini Define this in order to add variables describing certain 27387e27f89fSTom Rini run-time determined information about the hardware to the 27397e27f89fSTom Rini environment. These will be named board_name, board_rev. 27407e27f89fSTom Rini 274106fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 274206fd8538SSimon Glass 274306fd8538SSimon Glass Normally the environment is loaded when the board is 274406fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 274506fd8538SSimon Glass that so that the environment is not available until 274606fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 274706fd8538SSimon Glass this is instead controlled by the value of 274806fd8538SSimon Glass /config/load-environment. 274906fd8538SSimon Glass 2750a8c7c708Swdenk- DataFlash Support: 27512abbe075Swdenk CONFIG_HAS_DATAFLASH 27522abbe075Swdenk 27532abbe075Swdenk Defining this option enables DataFlash features and 27542abbe075Swdenk allows to read/write in Dataflash via the standard 27552abbe075Swdenk commands cp, md... 27562abbe075Swdenk 2757f61ec45eSEric Nelson- Serial Flash support 2758f61ec45eSEric Nelson CONFIG_CMD_SF 2759f61ec45eSEric Nelson 2760f61ec45eSEric Nelson Defining this option enables SPI flash commands 2761f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2762f61ec45eSEric Nelson 2763f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2764f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2765f61ec45eSEric Nelson commands. 2766f61ec45eSEric Nelson 2767f61ec45eSEric Nelson The following defaults may be provided by the platform 2768f61ec45eSEric Nelson to handle the common case when only a single serial 2769f61ec45eSEric Nelson flash is present on the system. 2770f61ec45eSEric Nelson 2771f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2772f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2773f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2774f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2775f61ec45eSEric Nelson 277624007273SSimon Glass CONFIG_CMD_SF_TEST 277724007273SSimon Glass 277824007273SSimon Glass Define this option to include a destructive SPI flash 277924007273SSimon Glass test ('sf test'). 278024007273SSimon Glass 27811dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 27821dcd6d03SJagannadha Sutradharudu Teki 27831dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 27841dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 27851dcd6d03SJagannadha Sutradharudu Teki 2786b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2787b902e07cSJagannadha Sutradharudu Teki 2788b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2789b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2790b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2791b902e07cSJagannadha Sutradharudu Teki 27923f85ce27Swdenk- SystemACE Support: 27933f85ce27Swdenk CONFIG_SYSTEMACE 27943f85ce27Swdenk 27953f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 27963f85ce27Swdenk chips attached via some sort of local bus. The address 279711ccc33fSMarcel Ziswiler of the chip must also be defined in the 27986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 27993f85ce27Swdenk 28003f85ce27Swdenk #define CONFIG_SYSTEMACE 28016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 28023f85ce27Swdenk 28033f85ce27Swdenk When SystemACE support is added, the "ace" device type 28043f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 28053f85ce27Swdenk 2806ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2807ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2808ecb0ccd9SWolfgang Denk 280928cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2810ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 281128cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2812ecb0ccd9SWolfgang Denk number generator is used. 2813ecb0ccd9SWolfgang Denk 281428cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 281528cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 281628cb9375SWolfgang Denk defined, the normal port 69 is used. 281728cb9375SWolfgang Denk 281828cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2819ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2820ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2821ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2822ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2823ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2824ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2825ecb0ccd9SWolfgang Denk 2826bf36c5d5SSimon Glass- Hashing support: 2827bf36c5d5SSimon Glass CONFIG_CMD_HASH 2828bf36c5d5SSimon Glass 2829bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2830bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2831bf36c5d5SSimon Glass 2832bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2833bf36c5d5SSimon Glass 2834bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2835bf36c5d5SSimon Glass size a little. 2836bf36c5d5SSimon Glass 2837bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2838bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2839bf36c5d5SSimon Glass 2840bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2841bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2842bf36c5d5SSimon Glass 2843a11f1873SRobert Winkler- Freescale i.MX specific commands: 2844a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2845a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2846a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2847a11f1873SRobert Winkler 2848a11f1873SRobert Winkler CONFIG_CMD_BMODE 2849a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2850a11f1873SRobert Winkler a boot from specific media. 2851a11f1873SRobert Winkler 2852a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2853a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2854a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2855a11f1873SRobert Winkler will set it back to normal. This command currently 2856a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2857a11f1873SRobert Winkler 285819c402afSSimon Glass- Signing support: 285919c402afSSimon Glass CONFIG_RSA 286019c402afSSimon Glass 286119c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 28628bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 286319c402afSSimon Glass 286419c402afSSimon Glass The signing part is build into mkimage regardless of this 286519c402afSSimon Glass option. 286619c402afSSimon Glass 28679e50c406SHeiko Schocher- bootcount support: 28689e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 28699e50c406SHeiko Schocher 28709e50c406SHeiko Schocher This enables the bootcounter support, see: 28719e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 28729e50c406SHeiko Schocher 28739e50c406SHeiko Schocher CONFIG_AT91SAM9XE 28749e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 28759e50c406SHeiko Schocher CONFIG_BLACKFIN 28769e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 28779e50c406SHeiko Schocher CONFIG_SOC_DA8XX 28789e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 28799e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 28809e50c406SHeiko Schocher enable support for the bootcounter in RAM 28819e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 28829e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 28839e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 28849e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 28859e50c406SHeiko Schocher the bootcounter. 28869e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 288719c402afSSimon Glass 2888a8c7c708Swdenk- Show boot progress: 2889c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2890c609719bSwdenk 2891c609719bSwdenk Defining this option allows to add some board- 2892c609719bSwdenk specific code (calling a user-provided function 2893c609719bSwdenk "show_boot_progress(int)") that enables you to show 2894c609719bSwdenk the system's boot progress on some display (for 2895c609719bSwdenk example, some LED's) on your board. At the moment, 2896c609719bSwdenk the following checkpoints are implemented: 2897c609719bSwdenk 28983a608ca0SSimon Glass- Detailed boot stage timing 28993a608ca0SSimon Glass CONFIG_BOOTSTAGE 29003a608ca0SSimon Glass Define this option to get detailed timing of each stage 29013a608ca0SSimon Glass of the boot process. 29023a608ca0SSimon Glass 29033a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 29043a608ca0SSimon Glass This is the number of available user bootstage records. 29053a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 29063a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 29073a608ca0SSimon Glass the limit, recording will stop. 29083a608ca0SSimon Glass 29093a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 29103a608ca0SSimon Glass Define this to print a report before boot, similar to this: 29113a608ca0SSimon Glass 29123a608ca0SSimon Glass Timer summary in microseconds: 29133a608ca0SSimon Glass Mark Elapsed Stage 29143a608ca0SSimon Glass 0 0 reset 29153a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 29163a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 29173a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 29183a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 29193a608ca0SSimon Glass 3,910,375 250,777 main_loop 29203a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 29213a608ca0SSimon Glass 30,361,327 445,160 start_kernel 29223a608ca0SSimon Glass 29232eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 29242eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 29252eba38cfSSimon Glass and un/stashing of bootstage data. 29262eba38cfSSimon Glass 292794fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 292894fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 292994fd1316SSimon Glass node is created with each bootstage id as a child. Each child 293094fd1316SSimon Glass has a 'name' property and either 'mark' containing the 293194fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 293294fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 293394fd1316SSimon Glass For example: 293494fd1316SSimon Glass 293594fd1316SSimon Glass bootstage { 293694fd1316SSimon Glass 154 { 293794fd1316SSimon Glass name = "board_init_f"; 293894fd1316SSimon Glass mark = <3575678>; 293994fd1316SSimon Glass }; 294094fd1316SSimon Glass 170 { 294194fd1316SSimon Glass name = "lcd"; 294294fd1316SSimon Glass accum = <33482>; 294394fd1316SSimon Glass }; 294494fd1316SSimon Glass }; 294594fd1316SSimon Glass 294694fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 294794fd1316SSimon Glass 29481372cce2SMarian BalakowiczLegacy uImage format: 29491372cce2SMarian Balakowicz 2950c609719bSwdenk Arg Where When 2951c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2952c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2953c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2954c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2955c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2956c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2957c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2958c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2959c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 29601372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2961c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2962c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2963c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2964c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 29651372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2966c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 29671372cce2SMarian Balakowicz 29681372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 29691372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 29701372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 29711372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 29721372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 29731372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 29741372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 297511ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 29761372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 29771372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 29781372cce2SMarian Balakowicz 2979ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2980c609719bSwdenk 2981a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 298263e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 298363e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 298463e73c9aSwdenk 2985566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2986566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2987566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2988566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2989566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2990566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2991566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2992566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2993566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2994566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2995566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2996566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2997566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2998566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2999566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3000566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3001566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3002566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3003566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3004566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3005566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3006566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3007566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3008566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3009566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3010566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3011566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3012566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3013566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3014566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3015566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3016566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3017566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3018566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3019566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3020566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3021566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3022566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3023566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3024566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3025566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3026566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3027566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3028566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3029566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3030566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3031566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3032c609719bSwdenk 3033566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3034c609719bSwdenk 3035566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3036566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3037566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3038206c60cbSwdenk 3039566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3040566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 304111ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3042566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3043566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3044566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 304574de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 304674de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3047566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3048c609719bSwdenk 30491372cce2SMarian BalakowiczFIT uImage format: 30501372cce2SMarian Balakowicz 30511372cce2SMarian Balakowicz Arg Where When 30521372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 30531372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 30541372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 30551372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 30561372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 30571372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3058f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 30591372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 30601372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 30611372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 30621372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 30631372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 306411ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 306511ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 30661372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 30671372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 30681372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 30691372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 30701372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 30711372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 30721372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 30731372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 30741372cce2SMarian Balakowicz 30751372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 30761372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 30771372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 307811ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 30791372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 30801372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 30811372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 30821372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 30831372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 30841372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 30851372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 30861372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 30871372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 30881372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 30891372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 30901372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 30911372cce2SMarian Balakowicz 309211ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 30931372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 30941372cce2SMarian Balakowicz 309511ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 30961372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 30971372cce2SMarian Balakowicz 309811ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 30991372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 31001372cce2SMarian Balakowicz 3101d95f6ec7SGabe Black- FIT image support: 3102d95f6ec7SGabe Black CONFIG_FIT 3103d95f6ec7SGabe Black Enable support for the FIT uImage format. 3104d95f6ec7SGabe Black 3105d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3106d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3107d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3108d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3109d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3110d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3111d95f6ec7SGabe Black 31123e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 31133e569a6bSSimon Glass This option enables signature verification of FIT uImages, 31143e569a6bSSimon Glass using a hash signed and verified using RSA. See 31153e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 31163e569a6bSSimon Glass 31174cf2609bSWolfgang Denk- Standalone program support: 31184cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 31194cf2609bSWolfgang Denk 31206feff899SWolfgang Denk This option defines a board specific value for the 31216feff899SWolfgang Denk address where standalone program gets loaded, thus 31226feff899SWolfgang Denk overwriting the architecture dependent default 31234cf2609bSWolfgang Denk settings. 31244cf2609bSWolfgang Denk 31254cf2609bSWolfgang Denk- Frame Buffer Address: 31264cf2609bSWolfgang Denk CONFIG_FB_ADDR 31274cf2609bSWolfgang Denk 31284cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 312944a53b57SWolfgang Denk address for frame buffer. This is typically the case 313044a53b57SWolfgang Denk when using a graphics controller has separate video 313144a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 313244a53b57SWolfgang Denk the given address instead of dynamically reserving it 313344a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 313444a53b57SWolfgang Denk the memory for the frame buffer depending on the 313544a53b57SWolfgang Denk configured panel size. 31364cf2609bSWolfgang Denk 31374cf2609bSWolfgang Denk Please see board_init_f function. 31384cf2609bSWolfgang Denk 3139cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3140cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3141cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3142cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3143cccfc2abSDetlev Zundel 3144cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3145cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3146cccfc2abSDetlev Zundel 3147cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3148cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3149cccfc2abSDetlev Zundel 3150cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3151cccfc2abSDetlev Zundel Needed for mtdparts command support. 3152cccfc2abSDetlev Zundel 3153cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3154cccfc2abSDetlev Zundel 3155cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3156cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3157cccfc2abSDetlev Zundel 315870c219cdSJoe Hershberger- UBI support 315970c219cdSJoe Hershberger CONFIG_CMD_UBI 316070c219cdSJoe Hershberger 316170c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 316270c219cdSJoe Hershberger with the UBI flash translation layer 316370c219cdSJoe Hershberger 316470c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 316570c219cdSJoe Hershberger 3166147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3167147162daSJoe Hershberger 3168147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3169147162daSJoe Hershberger warnings and errors enabled. 3170147162daSJoe Hershberger 317170c219cdSJoe Hershberger- UBIFS support 317270c219cdSJoe Hershberger CONFIG_CMD_UBIFS 317370c219cdSJoe Hershberger 317470c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 317570c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 317670c219cdSJoe Hershberger 317770c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 317870c219cdSJoe Hershberger 3179147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3180147162daSJoe Hershberger 3181147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3182147162daSJoe Hershberger warnings and errors enabled. 3183147162daSJoe Hershberger 31846a11cf48SDaniel Schwierzeck- SPL framework 31856a11cf48SDaniel Schwierzeck CONFIG_SPL 31866a11cf48SDaniel Schwierzeck Enable building of SPL globally. 31876a11cf48SDaniel Schwierzeck 318895579793STom Rini CONFIG_SPL_LDSCRIPT 318995579793STom Rini LDSCRIPT for linking the SPL binary. 319095579793STom Rini 31916ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 31926ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 31936ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 31946ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 31958960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 31966ebc3461SAlbert ARIBAUD must not be both defined at the same time. 31976ebc3461SAlbert ARIBAUD 319895579793STom Rini CONFIG_SPL_MAX_SIZE 31996ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 32006ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 32016ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 32026ebc3461SAlbert ARIBAUD not exceed it. 320395579793STom Rini 32046a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 32056a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 32066a11cf48SDaniel Schwierzeck 320794a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 320894a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 320994a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 321094a45bb1SScott Wood 321195579793STom Rini CONFIG_SPL_BSS_START_ADDR 321295579793STom Rini Link address for the BSS within the SPL binary. 321395579793STom Rini 321495579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 32156ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 32166ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 32176ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 32188960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 32196ebc3461SAlbert ARIBAUD must not be both defined at the same time. 322095579793STom Rini 322195579793STom Rini CONFIG_SPL_STACK 322295579793STom Rini Adress of the start of the stack SPL will use 322395579793STom Rini 322494a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 322594a45bb1SScott Wood Adress of the start of the stack SPL will use after 322694a45bb1SScott Wood relocation. If unspecified, this is equal to 322794a45bb1SScott Wood CONFIG_SPL_STACK. 322894a45bb1SScott Wood 322995579793STom Rini CONFIG_SYS_SPL_MALLOC_START 323095579793STom Rini Starting address of the malloc pool used in SPL. 323195579793STom Rini 323295579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 323395579793STom Rini The size of the malloc pool used in SPL. 32346a11cf48SDaniel Schwierzeck 323547f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 323647f7bcaeSTom Rini Enable the SPL framework under common/. This framework 323747f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 323847f7bcaeSTom Rini NAND loading of the Linux Kernel. 323947f7bcaeSTom Rini 3240861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3241861a86f4STom Rini For ARM, enable an optional function to print more information 3242861a86f4STom Rini about the running system. 3243861a86f4STom Rini 32444b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 32454b919725SScott Wood Arch init code should be built for a very small image 32464b919725SScott Wood 32476a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 32486a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 32496a11cf48SDaniel Schwierzeck 32506a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 32516a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 32526a11cf48SDaniel Schwierzeck 32536a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 32546a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 32556a11cf48SDaniel Schwierzeck 32566a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 32576a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 32586a11cf48SDaniel Schwierzeck 32596a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 32606a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 32616a11cf48SDaniel Schwierzeck 326295579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 326395579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 326495579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 326595579793STom Rini Address, size and partition on the MMC to load U-Boot from 326695579793STom Rini when the MMC is being used in raw mode. 326795579793STom Rini 32682b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 32692b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 32702b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 32712b75b0adSPeter Korsgaard 32722b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 32732b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 32742b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 32752b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 32762b75b0adSPeter Korsgaard (for falcon mode) 32772b75b0adSPeter Korsgaard 327895579793STom Rini CONFIG_SPL_FAT_SUPPORT 327995579793STom Rini Support for fs/fat/libfat.o in SPL binary 328095579793STom Rini 328195579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 328295579793STom Rini Filename to read to load U-Boot when reading from FAT 328395579793STom Rini 32847ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 32857ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 32867ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 32877ad2cc79SPeter Korsgaard 32887ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 32897ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 32907ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 32917ad2cc79SPeter Korsgaard 329206f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 329306f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 329406f60ae3SScott Wood start.S waits for the rest of the SPL to load before 329506f60ae3SScott Wood continuing (the hardware starts execution after just 329606f60ae3SScott Wood loading the first page rather than the full 4K). 329706f60ae3SScott Wood 32986f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 32996f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 33006f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 33016f2f01b9SScott Wood 33026f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 33036f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 33046f2f01b9SScott Wood 33056f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 33066f2f01b9SScott Wood Include standard software ECC in the SPL 33076f2f01b9SScott Wood 330895579793STom Rini CONFIG_SPL_NAND_SIMPLE 33097d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 33107d4b7955SScott Wood expose the cmd_ctrl() interface. 331195579793STom Rini 3312bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3313bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 33145614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3315bb0dc108SYing Zhang 33167c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 33177c8eea59SYing Zhang Set for common ddr init with serial presence detect in 33187c8eea59SYing Zhang SPL binary. 33197c8eea59SYing Zhang 332095579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 332195579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 332295579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 332395579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 332495579793STom Rini CONFIG_SYS_NAND_ECCBYTES 332595579793STom Rini Defines the size and behavior of the NAND that SPL uses 33267d4b7955SScott Wood to read U-Boot 332795579793STom Rini 3328fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3329fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3330fbe76ae4SPrabhakar Kushwaha 333195579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 33327d4b7955SScott Wood Location in NAND to read U-Boot from 33337d4b7955SScott Wood 33347d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 33357d4b7955SScott Wood Location in memory to load U-Boot to 33367d4b7955SScott Wood 33377d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 33387d4b7955SScott Wood Size of image to load 333995579793STom Rini 334095579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 33417d4b7955SScott Wood Entry point in loaded image to jump to 334295579793STom Rini 334395579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 334495579793STom Rini Define this if you need to first read the OOB and then the 334595579793STom Rini data. This is used for example on davinci plattforms. 334695579793STom Rini 334795579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 334895579793STom Rini Support for an OMAP3-specific set of functions to return the 334995579793STom Rini ID and MFR of the first attached NAND chip, if present. 335095579793STom Rini 33516a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 33526a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 33536a11cf48SDaniel Schwierzeck 33546a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 33556a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 33566a11cf48SDaniel Schwierzeck 33576a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 33586a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 33596a11cf48SDaniel Schwierzeck 3360c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3361c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3362c57b953dSPavel Machek 33636a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 33646a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 33651372cce2SMarian Balakowicz 3366ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3367ba1bee43SYing Zhang Support for the environment operating in SPL binary 3368ba1bee43SYing Zhang 3369ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3370ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3371ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3372ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3373ba1bee43SYing Zhang 337474752baaSScott Wood CONFIG_SPL_PAD_TO 33756113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 33766113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 33776113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 33786113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 33796113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 338074752baaSScott Wood 3381ca2fca22SScott Wood CONFIG_SPL_TARGET 3382ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3383ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3384ca2fca22SScott Wood example if more than one image needs to be produced. 3385ca2fca22SScott Wood 338687ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 338787ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 338887ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 338987ebee39SSimon Glass option to re-enable it. This will affect the output of the 339087ebee39SSimon Glass bootm command when booting a FIT image. 339187ebee39SSimon Glass 33923aa29de0SYing Zhang- TPL framework 33933aa29de0SYing Zhang CONFIG_TPL 33943aa29de0SYing Zhang Enable building of TPL globally. 33953aa29de0SYing Zhang 33963aa29de0SYing Zhang CONFIG_TPL_PAD_TO 33973aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 33983aa29de0SYing Zhang the TPL payload. By default, this is defined as 33993aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 34003aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 34013aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 34023aa29de0SYing Zhang 3403c609719bSwdenkModem Support: 3404c609719bSwdenk-------------- 3405c609719bSwdenk 3406566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3407c609719bSwdenk 340811ccc33fSMarcel Ziswiler- Modem support enable: 3409c609719bSwdenk CONFIG_MODEM_SUPPORT 3410c609719bSwdenk 3411c609719bSwdenk- RTS/CTS Flow control enable: 3412c609719bSwdenk CONFIG_HWFLOW 3413c609719bSwdenk 3414c609719bSwdenk- Modem debug support: 3415c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3416c609719bSwdenk 3417c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3418c609719bSwdenk for modem support. Useful only with BDI2000. 3419c609719bSwdenk 3420a8c7c708Swdenk- Interrupt support (PPC): 3421a8c7c708Swdenk 3422a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3423a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 342411ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3425a8c7c708Swdenk should set decrementer_count to appropriate value. If 342611ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3427a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 342811ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3429a8c7c708Swdenk specific handling. If board has watchdog / status_led 3430a8c7c708Swdenk / other_activity_monitor it works automatically from 3431a8c7c708Swdenk general timer_interrupt(). 3432a8c7c708Swdenk 3433c609719bSwdenk- General: 3434c609719bSwdenk 3435c609719bSwdenk In the target system modem support is enabled when a 3436c609719bSwdenk specific key (key combination) is pressed during 3437c609719bSwdenk power-on. Otherwise U-Boot will boot normally 343811ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3439c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3440c609719bSwdenk function, returning 1 and thus enabling modem 3441c609719bSwdenk initialization. 3442c609719bSwdenk 3443c609719bSwdenk If there are no modem init strings in the 3444c609719bSwdenk environment, U-Boot proceed to autoboot; the 3445c609719bSwdenk previous output (banner, info printfs) will be 344611ccc33fSMarcel Ziswiler suppressed, though. 3447c609719bSwdenk 3448c609719bSwdenk See also: doc/README.Modem 3449c609719bSwdenk 34509660e442SHelmut RaigerBoard initialization settings: 34519660e442SHelmut Raiger------------------------------ 34529660e442SHelmut Raiger 34539660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 34549660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 34559660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 34569660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 34579660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 34589660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 34599660e442SHelmut Raiger 34609660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 34619660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 34629660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 34639660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3464c609719bSwdenk 3465c609719bSwdenkConfiguration Settings: 3466c609719bSwdenk----------------------- 3467c609719bSwdenk 34686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3469c609719bSwdenk undefine this when you're short of memory. 3470c609719bSwdenk 34712fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 34722fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 34732fb2604dSPeter Tyser 34746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3475c609719bSwdenk prompt for user input. 3476c609719bSwdenk 34776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3478c609719bSwdenk 34796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3480c609719bSwdenk 34816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3482c609719bSwdenk 34836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3484c609719bSwdenk the application (usually a Linux kernel) when it is 3485c609719bSwdenk booted 3486c609719bSwdenk 34876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3488c609719bSwdenk List of legal baudrate settings for this board. 3489c609719bSwdenk 34906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3491c609719bSwdenk Suppress display of console information at boot. 3492c609719bSwdenk 34936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3494c609719bSwdenk If the board specific function 3495c609719bSwdenk extern int overwrite_console (void); 3496c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3497c609719bSwdenk serial port, else the settings in the environment are used. 3498c609719bSwdenk 34996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3500c609719bSwdenk Enable the call to overwrite_console(). 3501c609719bSwdenk 35026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3503c609719bSwdenk Enable overwrite of previous console environment settings. 3504c609719bSwdenk 35056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3506c609719bSwdenk Begin and End addresses of the area used by the 3507c609719bSwdenk simple memory test. 3508c609719bSwdenk 35096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3510c609719bSwdenk Enable an alternate, more extensive memory test. 3511c609719bSwdenk 35126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 35135f535fe1Swdenk Scratch address used by the alternate memory test 35145f535fe1Swdenk You only need to set this if address zero isn't writeable 35155f535fe1Swdenk 35166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 35176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 351814f73ca6SStefan Roese this specified memory area will get subtracted from the top 351911ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 352014f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 352114f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 352214f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 35235e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 352414f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 35255e12e75dSStefan Roese will have to get fixed in Linux additionally. 352614f73ca6SStefan Roese 352714f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 352814f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 352914f73ca6SStefan Roese be touched. 353014f73ca6SStefan Roese 353114f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 353214f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 353314f73ca6SStefan Roese then the end address of the Linux memory will be located at a 353414f73ca6SStefan Roese non page size aligned address and this could cause major 353514f73ca6SStefan Roese problems. 353614f73ca6SStefan Roese 35376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3538c609719bSwdenk Enable temporary baudrate change while serial download 3539c609719bSwdenk 35406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3541c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3542c609719bSwdenk 35436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3544c609719bSwdenk Physical start address of Motherboard I/O (if using a 3545c609719bSwdenk Cogent motherboard) 3546c609719bSwdenk 35476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3548c609719bSwdenk Physical start address of Flash memory. 3549c609719bSwdenk 35506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3551c609719bSwdenk Physical start address of boot monitor code (set by 3552c609719bSwdenk make config files to be same as the text base address 355314d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 35546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3555c609719bSwdenk 35566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 35573b57fe0aSwdenk Size of memory reserved for monitor code, used to 35583b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 35593b57fe0aSwdenk embedded within the U-Boot image, or in a separate 35603b57fe0aSwdenk flash sector. 3561c609719bSwdenk 35626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3563c609719bSwdenk Size of DRAM reserved for malloc() use. 3564c609719bSwdenk 35656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 356615940c9aSStefan Roese Normally compressed uImages are limited to an 356715940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 35686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 356915940c9aSStefan Roese to adjust this setting to your needs. 3570c609719bSwdenk 35716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3572c609719bSwdenk Maximum size of memory mapped by the startup code of 3573c609719bSwdenk the Linux kernel; all data that must be processed by 35747d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 35757d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 35761bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 35777d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3578c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3579c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3580c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3581c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3582c609719bSwdenk 3583fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3584fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3585fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3586fca43cc8SJohn Rigby is enabled. 3587fca43cc8SJohn Rigby 3588fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3589fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3590fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3591fca43cc8SJohn Rigby 3592fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3593fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3594fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3595fca43cc8SJohn Rigby 35966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3597c609719bSwdenk Max number of Flash memory banks 3598c609719bSwdenk 35996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3600c609719bSwdenk Max number of sectors on a Flash chip 3601c609719bSwdenk 36026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3603c609719bSwdenk Timeout for Flash erase operations (in ms) 3604c609719bSwdenk 36056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3606c609719bSwdenk Timeout for Flash write operations (in ms) 3607c609719bSwdenk 36086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 36098564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 36108564acf9Swdenk 36116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 36128564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 36138564acf9Swdenk 36146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 36158564acf9Swdenk If defined, hardware flash sectors protection is used 36168564acf9Swdenk instead of U-Boot software protection. 36178564acf9Swdenk 36186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3619c609719bSwdenk 3620c609719bSwdenk Enable TFTP transfers directly to flash memory; 3621c609719bSwdenk without this option such a download has to be 3622c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3623c609719bSwdenk copy from RAM to flash. 3624c609719bSwdenk 3625c609719bSwdenk The two-step approach is usually more reliable, since 3626c609719bSwdenk you can check if the download worked before you erase 362711ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 362811ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3629c609719bSwdenk downloaded image) this option may be very useful. 3630c609719bSwdenk 36316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3632c609719bSwdenk Define if the flash driver uses extra elements in the 36335653fc33Swdenk common flash structure for storing flash geometry. 36345653fc33Swdenk 363500b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 36365653fc33Swdenk This option also enables the building of the cfi_flash driver 36375653fc33Swdenk in the drivers directory 363853cf9435Sstroese 363991809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 364091809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 364191809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 364291809ed5SPiotr Ziecik to the MTD layer. 364391809ed5SPiotr Ziecik 36446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 364596ef831fSGuennadi Liakhovetski Use buffered writes to flash. 364696ef831fSGuennadi Liakhovetski 364796ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 364896ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 364996ef831fSGuennadi Liakhovetski write commands. 365096ef831fSGuennadi Liakhovetski 36516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 36525568e613SStefan Roese If this option is defined, the common CFI flash doesn't 36535568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 36545568e613SStefan Roese is useful, if some of the configured banks are only 36555568e613SStefan Roese optionally available. 36565568e613SStefan Roese 36579a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 36589a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 36599a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 36609a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 36619a042e9cSJerry Van Baren 3662352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3663352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3664352ef3f1SStefan Roese against the source after the write operation. An error message 3665352ef3f1SStefan Roese will be printed when the contents are not identical. 3666352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3667352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3668352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3669352ef3f1SStefan Roese this option if you really know what you are doing. 3670352ef3f1SStefan Roese 36716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 367211ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 367311ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 367453cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 367553cf9435Sstroese buffers can be full shortly after enabling the interface 367611ccc33fSMarcel Ziswiler on high Ethernet traffic. 367753cf9435Sstroese Defaults to 4 if not defined. 3678c609719bSwdenk 3679ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3680ea882bafSWolfgang Denk 3681ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3682ea882bafSWolfgang Denk internally to store the environment settings. The default 3683ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3684ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3685ea882bafSWolfgang Denk lib/hashtable.c for details. 3686ea882bafSWolfgang Denk 36872598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 36882598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 36891bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 36902598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 36912598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 36922598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 36932598090bSJoe Hershberger 36942598090bSJoe Hershberger The format of the list is: 36952598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3696267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3697267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 36982598090bSJoe Hershberger entry = variable_name[:attributes] 36992598090bSJoe Hershberger list = entry[,list] 37002598090bSJoe Hershberger 37012598090bSJoe Hershberger The type attributes are: 37022598090bSJoe Hershberger s - String (default) 37032598090bSJoe Hershberger d - Decimal 37042598090bSJoe Hershberger x - Hexadecimal 37052598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 37062598090bSJoe Hershberger i - IP address 37072598090bSJoe Hershberger m - MAC address 37082598090bSJoe Hershberger 3709267541f7SJoe Hershberger The access attributes are: 3710267541f7SJoe Hershberger a - Any (default) 3711267541f7SJoe Hershberger r - Read-only 3712267541f7SJoe Hershberger o - Write-once 3713267541f7SJoe Hershberger c - Change-default 3714267541f7SJoe Hershberger 37152598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 37162598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 37172598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 37182598090bSJoe Hershberger 37192598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 37202598090bSJoe Hershberger Define this to a list (string) to define validation that 37212598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 37222598090bSJoe Hershberger environment variable. To override a setting in the static 37232598090bSJoe Hershberger list, simply add an entry for the same variable name to the 37242598090bSJoe Hershberger ".flags" variable. 37252598090bSJoe Hershberger 3726267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3727267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3728267541f7SJoe Hershberger access flags. 3729267541f7SJoe Hershberger 37305c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 37315c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 37325c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 37335c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 37345c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 37355c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 37365c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 37375c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 37385c1a7ea6SSimon Glass your board please report the problem and send patches! 37395c1a7ea6SSimon Glass 3740632efa74SSimon Glass- CONFIG_SYS_SYM_OFFSETS 3741632efa74SSimon Glass This is set by architectures that use offsets for link symbols 3742632efa74SSimon Glass instead of absolute values. So bss_start is obtained using an 3743632efa74SSimon Glass offset _bss_start_ofs from CONFIG_SYS_TEXT_BASE, rather than 3744632efa74SSimon Glass directly. You should not need to touch this setting. 3745632efa74SSimon Glass 37460b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 37470b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 37480b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 37490b1b60c7SLokesh Vutla the value can be calulated on a given board. 3750632efa74SSimon Glass 3751c609719bSwdenkThe following definitions that deal with the placement and management 3752c609719bSwdenkof environment data (variable area); in general, we support the 3753c609719bSwdenkfollowing configurations: 3754c609719bSwdenk 3755c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3756c3eb3fe4SMike Frysinger 3757c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3758c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3759c3eb3fe4SMike Frysinger 37605a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3761c609719bSwdenk 3762c609719bSwdenk Define this if the environment is in flash memory. 3763c609719bSwdenk 3764c609719bSwdenk a) The environment occupies one whole flash sector, which is 3765c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3766c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3767c609719bSwdenk sector" type flash chips, which have several smaller 3768c609719bSwdenk sectors at the start or the end. For instance, such a 3769c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3770c609719bSwdenk such a case you would place the environment in one of the 3771c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3772c609719bSwdenk "top boot sector" type flash chips, you would put the 3773c609719bSwdenk environment in one of the last sectors, leaving a gap 3774c609719bSwdenk between U-Boot and the environment. 3775c609719bSwdenk 37760e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3777c609719bSwdenk 3778c609719bSwdenk Offset of environment data (variable area) to the 3779c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3780c609719bSwdenk type flash chips the second sector can be used: the offset 3781c609719bSwdenk for this sector is given here. 3782c609719bSwdenk 37836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3784c609719bSwdenk 37850e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3786c609719bSwdenk 3787c609719bSwdenk This is just another way to specify the start address of 3788c609719bSwdenk the flash sector containing the environment (instead of 37890e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3790c609719bSwdenk 37910e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3792c609719bSwdenk 3793c609719bSwdenk Size of the sector containing the environment. 3794c609719bSwdenk 3795c609719bSwdenk 3796c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3797c609719bSwdenk In such a case you don't want to spend a whole sector for 3798c609719bSwdenk the environment. 3799c609719bSwdenk 38000e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3801c609719bSwdenk 38025a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 38030e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3804c609719bSwdenk of this flash sector for the environment. This saves 3805c609719bSwdenk memory for the RAM copy of the environment. 3806c609719bSwdenk 3807c609719bSwdenk It may also save flash memory if you decide to use this 3808c609719bSwdenk when your environment is "embedded" within U-Boot code, 3809c609719bSwdenk since then the remainder of the flash sector could be used 3810c609719bSwdenk for U-Boot code. It should be pointed out that this is 3811c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3812c609719bSwdenk updating the environment in flash makes it always 3813c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3814c609719bSwdenk wrong before the contents has been restored from a copy in 3815c609719bSwdenk RAM, your target system will be dead. 3816c609719bSwdenk 38170e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 38180e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3819c609719bSwdenk 3820c609719bSwdenk These settings describe a second storage area used to hold 382111ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 38223e38691eSwdenk a valid backup copy in case there is a power failure during 3823c609719bSwdenk a "saveenv" operation. 3824c609719bSwdenk 3825c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3826c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3827c609719bSwdenkaccordingly! 3828c609719bSwdenk 3829c609719bSwdenk 38309314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3831c609719bSwdenk 3832c609719bSwdenk Define this if you have some non-volatile memory device 3833c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3834c609719bSwdenk environment. 3835c609719bSwdenk 38360e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 38370e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3838c609719bSwdenk 383911ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3840c609719bSwdenk want to use for environment. It is assumed that this memory 3841c609719bSwdenk can just be read and written to, without any special 3842c609719bSwdenk provision. 3843c609719bSwdenk 3844c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3845c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 384611ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3847c609719bSwdenkU-Boot will hang. 3848c609719bSwdenk 3849c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3850c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3851c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3852c609719bSwdenkto save the current settings. 3853c609719bSwdenk 3854c609719bSwdenk 3855bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3856c609719bSwdenk 3857c609719bSwdenk Use this if you have an EEPROM or similar serial access 3858c609719bSwdenk device and a driver for it. 3859c609719bSwdenk 38600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 38610e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3862c609719bSwdenk 3863c609719bSwdenk These two #defines specify the offset and size of the 3864c609719bSwdenk environment area within the total memory of your EEPROM. 3865c609719bSwdenk 38666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3867c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3868c609719bSwdenk The default address is zero. 3869c609719bSwdenk 38706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3871c609719bSwdenk If defined, the number of bits used to address bytes in a 3872c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3873c609719bSwdenk would require six bits. 3874c609719bSwdenk 38756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3876c609719bSwdenk If defined, the number of milliseconds to delay between 3877c609719bSwdenk page writes. The default is zero milliseconds. 3878c609719bSwdenk 38796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3880c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3881c609719bSwdenk that this is NOT the chip address length! 3882c609719bSwdenk 38836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 38845cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 38855cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 38865cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 38875cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 38885cf91d6bSwdenk byte chips. 38895cf91d6bSwdenk 38905cf91d6bSwdenk Note that we consider the length of the address field to 38915cf91d6bSwdenk still be one byte because the extra address bits are hidden 38925cf91d6bSwdenk in the chip address. 38935cf91d6bSwdenk 38946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3895c609719bSwdenk The size in bytes of the EEPROM device. 3896c609719bSwdenk 3897548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3898548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3899548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3900548738b4SHeiko Schocher 3901548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3902548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3903548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3904548738b4SHeiko Schocher EEPROM. For example: 3905548738b4SHeiko Schocher 3906ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 3907548738b4SHeiko Schocher 3908548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3909548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3910c609719bSwdenk 3911057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 39125779d8d9Swdenk 39135779d8d9Swdenk Define this if you have a DataFlash memory device which you 39145779d8d9Swdenk want to use for the environment. 39155779d8d9Swdenk 39160e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39170e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39180e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 39195779d8d9Swdenk 39205779d8d9Swdenk These three #defines specify the offset and size of the 39215779d8d9Swdenk environment area within the total memory of your DataFlash placed 39225779d8d9Swdenk at the specified address. 39235779d8d9Swdenk 39240a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 39250a85a9e7SLiu Gang 39260a85a9e7SLiu Gang Define this if you have a remote memory space which you 39270a85a9e7SLiu Gang want to use for the local device's environment. 39280a85a9e7SLiu Gang 39290a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 39300a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 39310a85a9e7SLiu Gang 39320a85a9e7SLiu Gang These two #defines specify the address and size of the 39330a85a9e7SLiu Gang environment area within the remote memory space. The 39340a85a9e7SLiu Gang local device can get the environment from remote memory 3935fc54c7faSLiu Gang space by SRIO or PCIE links. 39360a85a9e7SLiu Gang 39370a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 39380a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3939fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3940fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 39410a85a9e7SLiu Gang 394251bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 394313a5695bSwdenk 394413a5695bSwdenk Define this if you have a NAND device which you want to use 394513a5695bSwdenk for the environment. 394613a5695bSwdenk 39470e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39480e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 394913a5695bSwdenk 395013a5695bSwdenk These two #defines specify the offset and size of the environment 3951fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3952fdd813deSScott Wood aligned to an erase block boundary. 39535779d8d9Swdenk 3954fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3955e443c944SMarkus Klotzbuecher 39560e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3957fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3958fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3959fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3960fdd813deSScott Wood aligned to an erase block boundary. 3961e443c944SMarkus Klotzbuecher 3962fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3963fdd813deSScott Wood 3964fdd813deSScott Wood Specifies the length of the region in which the environment 3965fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3966fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3967fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3968fdd813deSScott Wood the range to be avoided. 3969fdd813deSScott Wood 3970fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3971fdd813deSScott Wood 3972fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3973fdd813deSScott Wood environment from block zero's out-of-band data. The 3974fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3975fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3976fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3977e443c944SMarkus Klotzbuecher 3978b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3979b74ab737SGuennadi Liakhovetski 3980b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3981b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3982b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3983b74ab737SGuennadi Liakhovetski 39842b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 39852b74433fSJoe Hershberger 39862b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 39872b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 39882b74433fSJoe Hershberger accesses, which is important on NAND. 39892b74433fSJoe Hershberger 39902b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 39912b74433fSJoe Hershberger 39922b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 39932b74433fSJoe Hershberger 39942b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 39952b74433fSJoe Hershberger 39962b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 39972b74433fSJoe Hershberger environment in. 39982b74433fSJoe Hershberger 3999785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4000785881f7SJoe Hershberger 4001785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4002785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4003785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4004785881f7SJoe Hershberger 40052b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 40062b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 40072b74433fSJoe Hershberger 40082b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 40092b74433fSJoe Hershberger when storing the env in UBI. 40102b74433fSJoe Hershberger 401106e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 401206e4ae5fSStephen Warren 401306e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 401406e4ae5fSStephen Warren environment. 401506e4ae5fSStephen Warren 401606e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 401706e4ae5fSStephen Warren 401806e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 401906e4ae5fSStephen Warren 402006e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 402106e4ae5fSStephen Warren 402206e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 402306e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 402406e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 402506e4ae5fSStephen Warren 402606e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 402706e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 402806e4ae5fSStephen Warren 402906e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 403006e4ae5fSStephen Warren area within the specified MMC device. 403106e4ae5fSStephen Warren 40325c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 40335c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 40345c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 40355c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 40365c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 40375c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 40385c088ee8SStephen Warren maximum possible space before it, to store other data. 40395c088ee8SStephen Warren 404006e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 404106e4ae5fSStephen Warren MMC sector boundary. 404206e4ae5fSStephen Warren 404306e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 404406e4ae5fSStephen Warren 404506e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 404606e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 404706e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 404806e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 404906e4ae5fSStephen Warren 40505c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 40515c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 40525c088ee8SStephen Warren 405306e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 405406e4ae5fSStephen Warren an MMC sector boundary. 405506e4ae5fSStephen Warren 405606e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 405706e4ae5fSStephen Warren 405806e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 405906e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 406006e4ae5fSStephen Warren CONFIG_ENV_SIZE. 406106e4ae5fSStephen Warren 40626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4063c609719bSwdenk 4064c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4065c609719bSwdenk area is used at an early stage (ROM part) if the environment 4066c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4067c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4068c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4069c609719bSwdenk to be a good choice since it makes it far enough from the 4070c609719bSwdenk start of the data area as well as from the stack pointer. 4071c609719bSwdenk 4072e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4073c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4074cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4075c609719bSwdenkuntil then to read environment variables. 4076c609719bSwdenk 407785ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 407885ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 407985ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 408085ec0bccSwdenknecessary, because the first environment variable we need is the 408185ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 408285ec0bccSwdenkhave any device yet where we could complain.] 4083c609719bSwdenk 4084c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4085c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 408685ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4087c609719bSwdenk 40886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4089fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4090fc3e2165Swdenk 40916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4092fc3e2165Swdenk also needs to be defined. 4093fc3e2165Swdenk 40946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4095fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4096c609719bSwdenk 4097f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4098f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4099f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4100f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4101f5675aa5SRon Madrid space for already greatly restricted images, including but not 4102f5675aa5SRon Madrid limited to NAND_SPL configurations. 4103f5675aa5SRon Madrid 4104b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4105b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4106b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4107b2b92f53SSimon Glass to do this. 4108b2b92f53SSimon Glass 4109e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4110e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4111e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4112e2e3e2b1SSimon Glass present. 4113e2e3e2b1SSimon Glass 4114c609719bSwdenkLow Level (hardware related) configuration options: 4115dc7c9a1aSwdenk--------------------------------------------------- 4116c609719bSwdenk 41176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4118c609719bSwdenk Cache Line Size of the CPU. 4119c609719bSwdenk 41206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4121c609719bSwdenk Default address of the IMMR after system reset. 41222535d602Swdenk 41232535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 41242535d602Swdenk and RPXsuper) to be able to adjust the position of 41252535d602Swdenk the IMMR register after a reset. 4126c609719bSwdenk 4127e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4128e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4129e46fedfeSTimur Tabi PowerPC SOCs. 4130e46fedfeSTimur Tabi 4131e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4132e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4133e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4134e46fedfeSTimur Tabi 4135e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4136e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4137e46fedfeSTimur Tabi 4138e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4139e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4140e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4141e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4142e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4143e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4144e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4145e46fedfeSTimur Tabi 4146e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4147e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4148e46fedfeSTimur Tabi 4149e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4150e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4151e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4152e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4153e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4154e46fedfeSTimur Tabi 4155e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4156e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4157e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4158e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4159e46fedfeSTimur Tabi 4160e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4161e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4162e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4163e46fedfeSTimur Tabi 41647f6c2cbcSwdenk- Floppy Disk Support: 41656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 41667f6c2cbcSwdenk 41677f6c2cbcSwdenk the default drive number (default value 0) 41687f6c2cbcSwdenk 41696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 41707f6c2cbcSwdenk 417111ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 41727f6c2cbcSwdenk (default value 1) 41737f6c2cbcSwdenk 41746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 41757f6c2cbcSwdenk 41767f6c2cbcSwdenk defines the offset of register from address. It 41777f6c2cbcSwdenk depends on which part of the data bus is connected to 417811ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 41797f6c2cbcSwdenk 41806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 41816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 41827f6c2cbcSwdenk default value. 41837f6c2cbcSwdenk 41846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 41857f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 41867f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 41877f6c2cbcSwdenk source code. It is used to make hardware dependant 41887f6c2cbcSwdenk initializations. 41897f6c2cbcSwdenk 41900abddf82SMacpaul Lin- CONFIG_IDE_AHB: 41910abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 41920abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 41930abddf82SMacpaul Lin When software is doing ATA command and data transfer to 41940abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 41950abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 41960abddf82SMacpaul Lin is requierd. 41970abddf82SMacpaul Lin 41986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 419925d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 420025d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4201c609719bSwdenk 42026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4203c609719bSwdenk 42047152b1d0Swdenk Start address of memory area that can be used for 4205c609719bSwdenk initial data and stack; please note that this must be 4206c609719bSwdenk writable memory that is working WITHOUT special 4207c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4208c609719bSwdenk will become available only after programming the 4209c609719bSwdenk memory controller and running certain initialization 4210c609719bSwdenk sequences. 4211c609719bSwdenk 4212c609719bSwdenk U-Boot uses the following memory types: 4213c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4214c609719bSwdenk - MPC824X: data cache 4215c609719bSwdenk - PPC4xx: data cache 4216c609719bSwdenk 42176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4218c609719bSwdenk 4219c609719bSwdenk Offset of the initial data structure in the memory 42206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 42216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4222c609719bSwdenk data is located at the end of the available space 4223553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 42246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 42256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 42266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4227c609719bSwdenk 4228c609719bSwdenk Note: 4229c609719bSwdenk On the MPC824X (or other systems that use the data 4230c609719bSwdenk cache for initial memory) the address chosen for 42316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4232c609719bSwdenk point to an otherwise UNUSED address space between 4233c609719bSwdenk the top of RAM and the start of the PCI space. 4234c609719bSwdenk 42356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4236c609719bSwdenk 42376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4238c609719bSwdenk 42396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4240c609719bSwdenk 42416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4242c609719bSwdenk 42436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4244c609719bSwdenk 42456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4246c609719bSwdenk 42476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4248c609719bSwdenk SDRAM timing 4249c609719bSwdenk 42506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4251c609719bSwdenk periodic timer for refresh 4252c609719bSwdenk 42536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4254c609719bSwdenk 42556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 42566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 42576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 42586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4259c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4260c609719bSwdenk 4261c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 42626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 42636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4264c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4265c609719bSwdenk 42666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 42676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4268c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4269c609719bSwdenk Prescaler definitions (SDRAM timing) 4270c609719bSwdenk 42716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4272c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4273c609719bSwdenk define relocation offset in DPRAM [DSP2] 4274c609719bSwdenk 42756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4276b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4277b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4278b423d055SHeiko Schocher 42796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4280c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4281c609719bSwdenk define relocation offset in DPRAM [SCC4] 4282c609719bSwdenk 42836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4284c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4285c609719bSwdenk wrong setting might damage your board. Read 4286c609719bSwdenk doc/README.MBX before setting this variable! 4287c609719bSwdenk 42886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4289ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4290ea909b76Swdenk (Power On Self Tests). This definition overrides 4291ea909b76Swdenk #define'd default value in commproc.h resp. 4292ea909b76Swdenk cpm_8260.h. 4293ea909b76Swdenk 42946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 42956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 42966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 42976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 42986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 42996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 43006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 43016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4302a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 43035d232d0eSwdenk 43049cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 43059cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 43069cacf4fcSDirk Eibach required. 43079cacf4fcSDirk Eibach 430869fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 430969fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 431069fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 431169fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 431269fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 431369fd2d3bSAndrew Sharp by coreboot or similar. 431469fd2d3bSAndrew Sharp 4315842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4316842033e6SGabor Juhos Enable support for indirect PCI bridges. 4317842033e6SGabor Juhos 4318a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4319a09b9b68SKumar Gala Chip has SRIO or not 4320a09b9b68SKumar Gala 4321a09b9b68SKumar Gala- CONFIG_SRIO1: 4322a09b9b68SKumar Gala Board has SRIO 1 port available 4323a09b9b68SKumar Gala 4324a09b9b68SKumar Gala- CONFIG_SRIO2: 4325a09b9b68SKumar Gala Board has SRIO 2 port available 4326a09b9b68SKumar Gala 4327c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4328c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4329c8b28152SLiu Gang 4330a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4331a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4332a09b9b68SKumar Gala 4333a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4334a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4335a09b9b68SKumar Gala 4336a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4337a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4338a09b9b68SKumar Gala 433966bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 434066bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 434166bd1846SFabio Estevam a 16 bit bus. 434266bd1846SFabio Estevam Not all NAND drivers use this symbol. 4343a430e916SFabio Estevam Example of drivers that use it: 434466bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4345a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4346eced4626SAlex Waterman 4347eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4348eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4349eced4626SAlex Waterman a default value will be used. 4350eced4626SAlex Waterman 4351bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4352218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4353218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4354218ca724SWolfgang Denk 4355bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4356bb99ad6dSBen Warren I2C address of the SPD EEPROM 4357bb99ad6dSBen Warren 43586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4359218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4360218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4361218ca724SWolfgang Denk to something your driver can deal with. 4362bb99ad6dSBen Warren 43631b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 43641b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 43651b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 43661b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 43671b3e3c4fSYork Sun header files or board specific files. 43681b3e3c4fSYork Sun 43696f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 43706f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 43716f5e1dc5SYork Sun 43726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4373218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4374218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 43752ad6b513STimur Tabi 4376c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4377c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4378c26e454dSwdenk 4379c26e454dSwdenk- CONFIG_FEC[12]_PHY 4380c26e454dSwdenk Define to the hardcoded PHY address which corresponds 43816e592385Swdenk to the given FEC; i. e. 4382c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4383c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4384c26e454dSwdenk 4385c26e454dSwdenk When set to -1, means to probe for first available. 4386c26e454dSwdenk 4387c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4388c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4389c26e454dSwdenk (so program the FEC to ignore it). 4390c26e454dSwdenk 4391c26e454dSwdenk- CONFIG_RMII 4392c26e454dSwdenk Enable RMII mode for all FECs. 4393c26e454dSwdenk Note that this is a global option, we can't 4394c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4395c26e454dSwdenk 43965cf91d6bSwdenk- CONFIG_CRC32_VERIFY 43975cf91d6bSwdenk Add a verify option to the crc32 command. 43985cf91d6bSwdenk The syntax is: 43995cf91d6bSwdenk 44005cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 44015cf91d6bSwdenk 44025cf91d6bSwdenk Where address/count indicate a memory area 44035cf91d6bSwdenk and crc32 is the correct crc32 which the 44045cf91d6bSwdenk area should have. 44055cf91d6bSwdenk 440656523f12Swdenk- CONFIG_LOOPW 440756523f12Swdenk Add the "loopw" memory command. This only takes effect if 4408602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 440956523f12Swdenk 44107b466641Sstroese- CONFIG_MX_CYCLIC 44117b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 44127b466641Sstroese "md/mw" commands. 44137b466641Sstroese Examples: 44147b466641Sstroese 44157b466641Sstroese => mdc.b 10 4 500 44167b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 44177b466641Sstroese 44187b466641Sstroese => mwc.l 100 12345678 10 44197b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 44207b466641Sstroese 44217b466641Sstroese This only takes effect if the memory commands are activated 4422602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 44237b466641Sstroese 44248aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4425afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4426e03f3169SWolfgang Denk low level initializations (like setting up the memory 4427e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4428e03f3169SWolfgang Denk relocate itself into RAM. 44298aa1a2d1Swdenk 4430e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4431e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4432e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4433e03f3169SWolfgang Denk these initializations itself. 44348aa1a2d1Swdenk 4435401bb30bSAneesh V- CONFIG_SPL_BUILD 4436df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4437df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4438df81238bSMagnus Lilja compiling a NAND SPL. 4439400558b5Swdenk 44403aa29de0SYing Zhang- CONFIG_TPL_BUILD 44413aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 44423aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 44433aa29de0SYing Zhang It is loaded by the SPL. 44443aa29de0SYing Zhang 44455df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 44465df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 44475df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 44485df572f0SYing Zhang previous 4k of the .text section. 44495df572f0SYing Zhang 44504213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 44514213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 44524213fc29SSimon Glass effective address. It is therefore not necessary to regard 44534213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 44544213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 44554213fc29SSimon Glass it maintains its own little RAM buffer which contains all 44564213fc29SSimon Glass addressable memory. This option causes some memory accesses 44574213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 44584213fc29SSimon Glass 4459d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4460d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4461d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4462d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4463d8834a13SMatthias Weisser conditions but may increase the binary size. 4464d8834a13SMatthias Weisser 4465588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4466588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4467588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4468b16f521aSGabe Black 4469fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4470fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4471fc33705eSMark Jackson 4472fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 44735b5ece9eSGabe Black 447416678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 447516678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 447616678eb4SHeiko Schocher 4477f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4478f2717b47STimur Tabi----------------------------------- 4479f2717b47STimur Tabi 4480f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4481f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4482f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4483f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4484f2717b47STimur Tabiwithin that device. 4485f2717b47STimur Tabi 4486f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 4487f2717b47STimur Tabi The address in the storage device where the firmware is located. The 4488f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4489f2717b47STimur Tabi is also specified. 4490f2717b47STimur Tabi 4491f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4492f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4493f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4494f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4495f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4496f2717b47STimur Tabi 4497f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4498f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4499f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4500f2717b47STimur Tabi virtual address in NOR flash. 4501f2717b47STimur Tabi 4502f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4503f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4504f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4505f2717b47STimur Tabi 4506f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4507f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4508f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4509f2717b47STimur Tabi 4510f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4511f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4512f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4513f2717b47STimur Tabi 4514292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4515292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4516292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4517fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4518fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4519fc54c7faSLiu Gang master's memory space. 4520f2717b47STimur Tabi 4521c609719bSwdenkBuilding the Software: 4522c609719bSwdenk====================== 4523c609719bSwdenk 4524218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4525218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4526218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4527218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4528218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4529218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4530c609719bSwdenk 4531218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4532218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4533218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4534218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4535218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4536c609719bSwdenk 4537218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4538218ca724SWolfgang Denk $ export CROSS_COMPILE 4539c609719bSwdenk 45402f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 45412f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 45422f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 45432f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 45442f8d396bSPeter Tyser 45452f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 45462f8d396bSPeter Tyser 45472f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 45482f8d396bSPeter Tyser be executed on computers running Windows. 45492f8d396bSPeter Tyser 4550c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4551c609719bSwdenksources you must configure U-Boot for one specific board type. This 4552c609719bSwdenkis done by typing: 4553c609719bSwdenk 4554c609719bSwdenk make NAME_config 4555c609719bSwdenk 4556218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 45574d675ae6SMichael Jonesrations; see boards.cfg for supported names. 455854387ac9Swdenk 4559c609719bSwdenkNote: for some board special configuration names may exist; check if 4560c609719bSwdenk additional information is available from the board vendor; for 45612729af9dSwdenk instance, the TQM823L systems are available without (standard) 45622729af9dSwdenk or with LCD support. You can select such additional "features" 456311ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4564c609719bSwdenk 45652729af9dSwdenk make TQM823L_config 45662729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4567c609719bSwdenk 4568c609719bSwdenk make TQM823L_LCD_config 4569c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4570c609719bSwdenk 4571c609719bSwdenk etc. 4572c609719bSwdenk 4573c609719bSwdenk 4574c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 45757152b1d0Swdenkimages ready for download to / installation on your system: 4576c609719bSwdenk 4577c609719bSwdenk- "u-boot.bin" is a raw binary image 4578c609719bSwdenk- "u-boot" is an image in ELF binary format 4579c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4580c609719bSwdenk 4581baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4582baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4583baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4584baf31249SMarian Balakowicz 4585baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4586baf31249SMarian Balakowicz 4587baf31249SMarian Balakowicz make O=/tmp/build distclean 4588baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4589baf31249SMarian Balakowicz make O=/tmp/build all 4590baf31249SMarian Balakowicz 4591baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4592baf31249SMarian Balakowicz 4593baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4594baf31249SMarian Balakowicz make distclean 4595baf31249SMarian Balakowicz make NAME_config 4596baf31249SMarian Balakowicz make all 4597baf31249SMarian Balakowicz 4598baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4599baf31249SMarian Balakowiczvariable. 4600baf31249SMarian Balakowicz 4601c609719bSwdenk 4602c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4603c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4604c609719bSwdenknative "make". 4605c609719bSwdenk 4606c609719bSwdenk 4607c609719bSwdenkIf the system board that you have is not listed, then you will need 4608c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4609c609719bSwdenksteps: 4610c609719bSwdenk 4611c609719bSwdenk1. Add a new configuration option for your board to the toplevel 46124d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 46134d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4614c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 461585ec0bccSwdenk files you need. In your board directory, you will need at least 461685ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 461785ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 461885ec0bccSwdenk your board 4619c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4620c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 462185ec0bccSwdenk4. Run "make <board>_config" with your new name. 4622c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4623c609719bSwdenk to be installed on your target system. 462485ec0bccSwdenk6. Debug and solve any problems that might arise. 4625c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4626c609719bSwdenk 4627c609719bSwdenk 4628c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4629c609719bSwdenk============================================================== 4630c609719bSwdenk 4631c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4632c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4633c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4634c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4635218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4636c609719bSwdenk 4637c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4638c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4639c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4640c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4641c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 46427152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4643218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4644218ca724SWolfgang Denkyou can type 4645c609719bSwdenk 4646c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4647c609719bSwdenk 4648c609719bSwdenkor to build on a native PowerPC system you can type 4649c609719bSwdenk 4650c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4651c609719bSwdenk 4652218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4653218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4654218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4655218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4656218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4657218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4658218ca724SWolfgang Denkvariable. For example: 4659baf31249SMarian Balakowicz 4660baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4661baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4662baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4663baf31249SMarian Balakowicz 4664218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4665218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4666218ca724SWolfgang Denkduring the whole build process. 4667baf31249SMarian Balakowicz 4668baf31249SMarian Balakowicz 4669c609719bSwdenkSee also "U-Boot Porting Guide" below. 4670c609719bSwdenk 4671c609719bSwdenk 4672c609719bSwdenkMonitor Commands - Overview: 4673c609719bSwdenk============================ 4674c609719bSwdenk 4675c609719bSwdenkgo - start application at address 'addr' 4676c609719bSwdenkrun - run commands in an environment variable 4677c609719bSwdenkbootm - boot application image from memory 4678c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 467944f074c7SMarek Vasutbootz - boot zImage from memory 4680c609719bSwdenktftpboot- boot image via network using TFTP protocol 4681c609719bSwdenk and env variables "ipaddr" and "serverip" 4682c609719bSwdenk (and eventually "gatewayip") 46831fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4684c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4685c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4686c609719bSwdenkloads - load S-Record file over serial line 4687c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4688c609719bSwdenkmd - memory display 4689c609719bSwdenkmm - memory modify (auto-incrementing) 4690c609719bSwdenknm - memory modify (constant address) 4691c609719bSwdenkmw - memory write (fill) 4692c609719bSwdenkcp - memory copy 4693c609719bSwdenkcmp - memory compare 4694c609719bSwdenkcrc32 - checksum calculation 46950f89c54bSPeter Tyseri2c - I2C sub-system 4696c609719bSwdenksspi - SPI utility commands 4697c609719bSwdenkbase - print or set address offset 4698c609719bSwdenkprintenv- print environment variables 4699c609719bSwdenksetenv - set environment variables 4700c609719bSwdenksaveenv - save environment variables to persistent storage 4701c609719bSwdenkprotect - enable or disable FLASH write protection 4702c609719bSwdenkerase - erase FLASH memory 4703c609719bSwdenkflinfo - print FLASH memory information 470410635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4705c609719bSwdenkbdinfo - print Board Info structure 4706c609719bSwdenkiminfo - print header information for application image 4707c609719bSwdenkconinfo - print console devices and informations 4708c609719bSwdenkide - IDE sub-system 4709c609719bSwdenkloop - infinite loop on address range 471056523f12Swdenkloopw - infinite write loop on address range 4711c609719bSwdenkmtest - simple RAM test 4712c609719bSwdenkicache - enable or disable instruction cache 4713c609719bSwdenkdcache - enable or disable data cache 4714c609719bSwdenkreset - Perform RESET of the CPU 4715c609719bSwdenkecho - echo args to console 4716c609719bSwdenkversion - print monitor version 4717c609719bSwdenkhelp - print online help 4718c609719bSwdenk? - alias for 'help' 4719c609719bSwdenk 4720c609719bSwdenk 4721c609719bSwdenkMonitor Commands - Detailed Description: 4722c609719bSwdenk======================================== 4723c609719bSwdenk 4724c609719bSwdenkTODO. 4725c609719bSwdenk 4726c609719bSwdenkFor now: just type "help <command>". 4727c609719bSwdenk 4728c609719bSwdenk 4729c609719bSwdenkEnvironment Variables: 4730c609719bSwdenk====================== 4731c609719bSwdenk 4732c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4733c609719bSwdenkcan be made persistent by saving to Flash memory. 4734c609719bSwdenk 4735c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4736c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4737c609719bSwdenkwithout a value can be used to delete a variable from the 4738c609719bSwdenkenvironment. As long as you don't save the environment you are 4739c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4740c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4741c609719bSwdenk 4742c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4743c96f86eeSWolfgang Denk 4744c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4745c609719bSwdenk 4746c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4747c609719bSwdenk 4748c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4749c609719bSwdenk 4750c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4751c609719bSwdenk 4752c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4753c609719bSwdenk 4754c609719bSwdenk bootfile - Name of the image to load with TFTP 4755c609719bSwdenk 47567d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 47577d721e34SBartlomiej Sieka command can be restricted. This variable is given as 47587d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 47597d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 47607d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 47617d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4762c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4763c3624e6eSGrant Likely bootm_mapsize. 4764c3624e6eSGrant Likely 4765c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4766c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4767c3624e6eSGrant Likely defines the size of the memory region starting at base 4768c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4769c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4770c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4771c3624e6eSGrant Likely used otherwise. 47727d721e34SBartlomiej Sieka 47737d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 47747d721e34SBartlomiej Sieka command can be restricted. This variable is given as 47757d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 47767d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 47777d721e34SBartlomiej Sieka environment variable. 47787d721e34SBartlomiej Sieka 47794bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 47804bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 47814bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 47824bae9090SBartlomiej Sieka 4783c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4784c609719bSwdenk "bootp" will just load perform a lookup of the 4785c609719bSwdenk configuration from the BOOTP server, but not try to 4786c609719bSwdenk load any image using TFTP 4787c609719bSwdenk 4788c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4789c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4790c609719bSwdenk be automatically started (by internally calling 4791c609719bSwdenk "bootm") 4792c609719bSwdenk 47934a6fd34bSwdenk If set to "no", a standalone image passed to the 47944a6fd34bSwdenk "bootm" command will be copied to the load address 47954a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 47964a6fd34bSwdenk This can be used to load and uncompress arbitrary 47974a6fd34bSwdenk data. 47984a6fd34bSwdenk 4799a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4800a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4801fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4802fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4803fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4804fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4805fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4806fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4807fa34f6b2SShawn Guo access it during the boot procedure. 4808fa34f6b2SShawn Guo 4809a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4810a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4811a28afca5SDavid A. Long to work it must reside in writable memory, have 4812a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4813a28afca5SDavid A. Long add the information it needs into it, and the memory 4814a28afca5SDavid A. Long must be accessible by the kernel. 4815a28afca5SDavid A. Long 4816eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4817eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4818eea63e05SSimon Glass defined. 4819eea63e05SSimon Glass 482017ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 482117ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 482217ea1177Swdenk mode (400kHZ). This environment variable is used in 482317ea1177Swdenk initialization code. So, for changes to be effective 482417ea1177Swdenk it must be saved and board must be reset. 482517ea1177Swdenk 4826c609719bSwdenk initrd_high - restrict positioning of initrd images: 4827c609719bSwdenk If this variable is not set, initrd images will be 4828c609719bSwdenk copied to the highest possible address in RAM; this 4829c609719bSwdenk is usually what you want since it allows for 4830c609719bSwdenk maximum initrd size. If for some reason you want to 4831c609719bSwdenk make sure that the initrd image is loaded below the 48326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4833c609719bSwdenk variable to a value of "no" or "off" or "0". 4834c609719bSwdenk Alternatively, you can set it to a maximum upper 4835c609719bSwdenk address to use (U-Boot will still check that it 4836c609719bSwdenk does not overwrite the U-Boot stack and data). 4837c609719bSwdenk 4838c609719bSwdenk For instance, when you have a system with 16 MB 48397152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4840c609719bSwdenk you can do this by adding "mem=12M" to the value of 4841c609719bSwdenk the "bootargs" variable. However, now you must make 48427152b1d0Swdenk sure that the initrd image is placed in the first 4843c609719bSwdenk 12 MB as well - this can be done with 4844c609719bSwdenk 4845c609719bSwdenk setenv initrd_high 00c00000 4846c609719bSwdenk 484738b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 484838b99261Swdenk indication to U-Boot that all addresses are legal 484938b99261Swdenk for the Linux kernel, including addresses in flash 485038b99261Swdenk memory. In this case U-Boot will NOT COPY the 485138b99261Swdenk ramdisk at all. This may be useful to reduce the 485238b99261Swdenk boot time on your system, but requires that this 485338b99261Swdenk feature is supported by your Linux kernel. 485438b99261Swdenk 4855c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4856c609719bSwdenk 4857c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4858dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4859c609719bSwdenk 4860c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4861c609719bSwdenk 4862c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4863c609719bSwdenk 4864c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4865c609719bSwdenk 4866c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4867c609719bSwdenk 4868c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4869c609719bSwdenk 4870e2a53458SMike Frysinger ethprime - controls which interface is used first. 4871a3d991bdSwdenk 4872e2a53458SMike Frysinger ethact - controls which interface is currently active. 4873e2a53458SMike Frysinger For example you can do the following 4874a3d991bdSwdenk 487548690d80SHeiko Schocher => setenv ethact FEC 487648690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 487748690d80SHeiko Schocher => setenv ethact SCC 487848690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4879a3d991bdSwdenk 4880e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4881e1692577SMatthias Fuchs available network interfaces. 4882e1692577SMatthias Fuchs It just stays at the currently selected interface. 4883e1692577SMatthias Fuchs 4884a3d991bdSwdenk netretry - When set to "no" each network operation will 4885a3d991bdSwdenk either succeed or fail without retrying. 48866e592385Swdenk When set to "once" the network operation will 48876e592385Swdenk fail when all the available network interfaces 48886e592385Swdenk are tried once without success. 4889a3d991bdSwdenk Useful on scripts which control the retry operation 4890a3d991bdSwdenk themselves. 4891a3d991bdSwdenk 4892b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4893a1cf027aSJean-Christophe PLAGNIOL-VILLARD 48948d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 48958d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 48968d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 48978d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 48988d51aacdSSimon Glass is silent. 48998d51aacdSSimon Glass 490028cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4901ecb0ccd9SWolfgang Denk UDP source port. 4902ecb0ccd9SWolfgang Denk 490328cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 490428cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 490528cb9375SWolfgang Denk 4906c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4907c96f86eeSWolfgang Denk we use the TFTP server's default block size 4908c96f86eeSWolfgang Denk 4909c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4910c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4911c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4912c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4913c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4914c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4915c96f86eeSWolfgang Denk with unreliable TFTP servers. 4916c96f86eeSWolfgang Denk 4917a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 491811ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4919a3d991bdSwdenk VLAN tagged frames. 4920c609719bSwdenk 4921dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4922dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4923dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4924dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4925dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4926dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4927dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4928dc0b7b0eSJason Hobbs 4929dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4930dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4931dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4932dc0b7b0eSJason Hobbs 4933dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4934dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4935dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4936dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4937dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4938dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4939dc0b7b0eSJason Hobbs 4940c609719bSwdenkThe following environment variables may be used and automatically 4941c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4942c609719bSwdenkdepending the information provided by your boot server: 4943c609719bSwdenk 4944c609719bSwdenk bootfile - see above 4945c609719bSwdenk dnsip - IP address of your Domain Name Server 4946fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4947c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4948c609719bSwdenk hostname - Target hostname 4949c609719bSwdenk ipaddr - see above 4950c609719bSwdenk netmask - Subnet Mask 4951c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4952c609719bSwdenk serverip - see above 4953c609719bSwdenk 4954c609719bSwdenk 4955c609719bSwdenkThere are two special Environment Variables: 4956c609719bSwdenk 4957c609719bSwdenk serial# - contains hardware identification information such 4958c609719bSwdenk as type string and/or serial number 4959c609719bSwdenk ethaddr - Ethernet address 4960c609719bSwdenk 4961c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4962c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4963c609719bSwdenkonce they have been set once. 4964c609719bSwdenk 4965c609719bSwdenk 4966c1551ea8SstroeseFurther special Environment Variables: 4967c1551ea8Sstroese 4968c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4969c1551ea8Sstroese with the "version" command. This variable is 4970c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4971c1551ea8Sstroese 4972c1551ea8Sstroese 4973c609719bSwdenkPlease note that changes to some configuration parameters may take 4974c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4975c609719bSwdenk 4976c609719bSwdenk 4977170ab110SJoe HershbergerCallback functions for environment variables: 4978170ab110SJoe Hershberger--------------------------------------------- 4979170ab110SJoe Hershberger 4980170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4981170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 4982170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4983170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4984170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4985170ab110SJoe Hershberger 4986170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4987170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 4988170ab110SJoe Hershberger 4989170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 4990170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 4991170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 4992170ab110SJoe Hershbergerassociations. The list must be in the following format: 4993170ab110SJoe Hershberger 4994170ab110SJoe Hershberger entry = variable_name[:callback_name] 4995170ab110SJoe Hershberger list = entry[,list] 4996170ab110SJoe Hershberger 4997170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 4998170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 4999170ab110SJoe Hershberger 5000170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5001170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5002170ab110SJoe Hershbergeroverride any association in the static list. You can define 5003170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5004170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5005170ab110SJoe Hershberger 5006170ab110SJoe Hershberger 5007f07771ccSwdenkCommand Line Parsing: 5008f07771ccSwdenk===================== 5009f07771ccSwdenk 5010f07771ccSwdenkThere are two different command line parsers available with U-Boot: 50117152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5012f07771ccSwdenk 5013f07771ccSwdenkOld, simple command line parser: 5014f07771ccSwdenk-------------------------------- 5015f07771ccSwdenk 5016f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5017f07771ccSwdenk- several commands on one line, separated by ';' 5018fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5019f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5020f07771ccSwdenk for example: 5021fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5022f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5023f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5024f07771ccSwdenk 5025f07771ccSwdenkHush shell: 5026f07771ccSwdenk----------- 5027f07771ccSwdenk 5028f07771ccSwdenk- similar to Bourne shell, with control structures like 5029f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5030f07771ccSwdenk until...do...done, ... 5031f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5032f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5033f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5034f07771ccSwdenk command 5035f07771ccSwdenk 5036f07771ccSwdenkGeneral rules: 5037f07771ccSwdenk-------------- 5038f07771ccSwdenk 5039f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5040f07771ccSwdenk command) contains several commands separated by semicolon, and 5041f07771ccSwdenk one of these commands fails, then the remaining commands will be 5042f07771ccSwdenk executed anyway. 5043f07771ccSwdenk 5044f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 504511ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5046f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5047f07771ccSwdenk variables are not executed. 5048f07771ccSwdenk 5049c609719bSwdenkNote for Redundant Ethernet Interfaces: 5050c609719bSwdenk======================================= 5051c609719bSwdenk 505211ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5053c609719bSwdenksuch configurations and is capable of automatic selection of a 50547152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5055c609719bSwdenk 5056c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5057c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5058c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5059c609719bSwdenk 5060c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5061c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5062c609719bSwdenkding setting in the environment; if the corresponding environment 5063c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5064c609719bSwdenk 5065c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5066c609719bSwdenk environment, the SROM's address is used. 5067c609719bSwdenk 5068c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5069c609719bSwdenk environment exists, then the value from the environment variable is 5070c609719bSwdenk used. 5071c609719bSwdenk 5072c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5073c609719bSwdenk both addresses are the same, this MAC address is used. 5074c609719bSwdenk 5075c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5076c609719bSwdenk addresses differ, the value from the environment is used and a 5077c609719bSwdenk warning is printed. 5078c609719bSwdenk 5079c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5080c609719bSwdenk is raised. 5081c609719bSwdenk 5082ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5083ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5084ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5085ecee9324SBen WarrenThe naming convention is as follows: 5086ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5087c609719bSwdenk 5088c609719bSwdenkImage Formats: 5089c609719bSwdenk============== 5090c609719bSwdenk 50913310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 50923310c549SMarian Balakowiczimages in two formats: 50933310c549SMarian Balakowicz 50943310c549SMarian BalakowiczNew uImage format (FIT) 50953310c549SMarian Balakowicz----------------------- 50963310c549SMarian Balakowicz 50973310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 50983310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 50993310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 51003310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 51013310c549SMarian Balakowicz 51023310c549SMarian Balakowicz 51033310c549SMarian BalakowiczOld uImage format 51043310c549SMarian Balakowicz----------------- 51053310c549SMarian Balakowicz 51063310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 51073310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 51083310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5109c609719bSwdenk 5110c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5111c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5112f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5113f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5114f5ed9e39SPeter Tyser INTEGRITY). 51157b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5116afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5117afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5118c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5119c609719bSwdenk* Load Address 5120c609719bSwdenk* Entry Point 5121c609719bSwdenk* Image Name 5122c609719bSwdenk* Image Timestamp 5123c609719bSwdenk 5124c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5125c609719bSwdenkand the data portions of the image are secured against corruption by 5126c609719bSwdenkCRC32 checksums. 5127c609719bSwdenk 5128c609719bSwdenk 5129c609719bSwdenkLinux Support: 5130c609719bSwdenk============== 5131c609719bSwdenk 5132c609719bSwdenkAlthough U-Boot should support any OS or standalone application 51337152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5134c609719bSwdenkU-Boot. 5135c609719bSwdenk 5136c609719bSwdenkU-Boot includes many features that so far have been part of some 5137c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5138c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5139c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 51407152b1d0Swdenkserves several purposes: 5141c609719bSwdenk 5142c609719bSwdenk- the same features can be used for other OS or standalone 5143c609719bSwdenk applications (for instance: using compressed images to reduce the 5144c609719bSwdenk Flash memory footprint) 5145c609719bSwdenk 5146c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 51477152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5148c609719bSwdenk 5149c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5150c609719bSwdenk images; of course this also means that different kernel images can 5151c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5152c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5153c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5154c609719bSwdenk software is easier now. 5155c609719bSwdenk 5156c609719bSwdenk 5157c609719bSwdenkLinux HOWTO: 5158c609719bSwdenk============ 5159c609719bSwdenk 5160c609719bSwdenkPorting Linux to U-Boot based systems: 5161c609719bSwdenk--------------------------------------- 5162c609719bSwdenk 5163c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5164c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5165c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5166c609719bSwdenkLinux :-). 5167c609719bSwdenk 5168a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5169c609719bSwdenk 5170c609719bSwdenkJust make sure your machine specific header file (for instance 5171c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 51721dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 51731dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 51746d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5175c609719bSwdenk 5176c609719bSwdenk 5177c609719bSwdenkConfiguring the Linux kernel: 5178c609719bSwdenk----------------------------- 5179c609719bSwdenk 5180c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5181c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5182c609719bSwdenk 5183c609719bSwdenk 5184c609719bSwdenkBuilding a Linux Image: 5185c609719bSwdenk----------------------- 5186c609719bSwdenk 518724ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 518824ee89b9Swdenknot used. If you use recent kernel source, a new build target 518924ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 519024ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 519124ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 519224ee89b9Swdenk100% compatible format. 5193c609719bSwdenk 5194c609719bSwdenkExample: 5195c609719bSwdenk 5196c609719bSwdenk make TQM850L_config 5197c609719bSwdenk make oldconfig 5198c609719bSwdenk make dep 519924ee89b9Swdenk make uImage 5200c609719bSwdenk 520124ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 520224ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 520324ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5204c609719bSwdenk 520524ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 520624ee89b9Swdenk 520724ee89b9Swdenk* convert the kernel into a raw binary image: 520824ee89b9Swdenk 520924ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 521024ee89b9Swdenk -R .note -R .comment \ 521124ee89b9Swdenk -S vmlinux linux.bin 521224ee89b9Swdenk 521324ee89b9Swdenk* compress the binary image: 521424ee89b9Swdenk 521524ee89b9Swdenk gzip -9 linux.bin 521624ee89b9Swdenk 521724ee89b9Swdenk* package compressed binary image for U-Boot: 521824ee89b9Swdenk 521924ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 522024ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 522124ee89b9Swdenk -d linux.bin.gz uImage 522224ee89b9Swdenk 522324ee89b9Swdenk 522424ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 522524ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 522624ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 522724ee89b9Swdenkbyte header containing information about target architecture, 522824ee89b9Swdenkoperating system, image type, compression method, entry points, time 522924ee89b9Swdenkstamp, CRC32 checksums, etc. 523024ee89b9Swdenk 523124ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 523224ee89b9Swdenkprint the header information, or to build new images. 5233c609719bSwdenk 5234c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5235c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5236c609719bSwdenkchecksum verification: 5237c609719bSwdenk 5238c609719bSwdenk tools/mkimage -l image 5239c609719bSwdenk -l ==> list image header information 5240c609719bSwdenk 5241c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5242c609719bSwdenkfrom a "data file" which is used as image payload: 5243c609719bSwdenk 5244c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5245c609719bSwdenk -n name -d data_file image 5246c609719bSwdenk -A ==> set architecture to 'arch' 5247c609719bSwdenk -O ==> set operating system to 'os' 5248c609719bSwdenk -T ==> set image type to 'type' 5249c609719bSwdenk -C ==> set compression type 'comp' 5250c609719bSwdenk -a ==> set load address to 'addr' (hex) 5251c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5252c609719bSwdenk -n ==> set image name to 'name' 5253c609719bSwdenk -d ==> use image data from 'datafile' 5254c609719bSwdenk 525569459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 525669459791Swdenkaddress (0x00000000), but the entry point address depends on the 525769459791Swdenkkernel version: 5258c609719bSwdenk 5259c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 526024ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5261c609719bSwdenk 5262c609719bSwdenkSo a typical call to build a U-Boot image would read: 5263c609719bSwdenk 526424ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 526524ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5266a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 526724ee89b9Swdenk > examples/uImage.TQM850L 526824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5269c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5270c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5271c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5272c609719bSwdenk Load Address: 0x00000000 527324ee89b9Swdenk Entry Point: 0x00000000 5274c609719bSwdenk 5275c609719bSwdenkTo verify the contents of the image (or check for corruption): 5276c609719bSwdenk 527724ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 527824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5279c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5280c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5281c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5282c609719bSwdenk Load Address: 0x00000000 528324ee89b9Swdenk Entry Point: 0x00000000 5284c609719bSwdenk 5285c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5286c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5287c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5288c609719bSwdenkneed to be uncompressed: 5289c609719bSwdenk 5290a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 529124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 529224ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5293a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 529424ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 529524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5296c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5297c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5298c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5299c609719bSwdenk Load Address: 0x00000000 530024ee89b9Swdenk Entry Point: 0x00000000 5301c609719bSwdenk 5302c609719bSwdenk 5303c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5304c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5305c609719bSwdenk 5306c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5307c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5308c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5309c609719bSwdenk Image Name: Simple Ramdisk Image 5310c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5311c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5312c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5313c609719bSwdenk Load Address: 0x00000000 5314c609719bSwdenk Entry Point: 0x00000000 5315c609719bSwdenk 5316a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5317a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5318a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5319a804b5ceSGuilherme Maciel Ferreirafrom the image: 5320a804b5ceSGuilherme Maciel Ferreira 5321a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5322a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5323a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5324a804b5ceSGuilherme Maciel Ferreira 5325c609719bSwdenk 5326c609719bSwdenkInstalling a Linux Image: 5327c609719bSwdenk------------------------- 5328c609719bSwdenk 5329c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5330c609719bSwdenkyou must convert the image to S-Record format: 5331c609719bSwdenk 5332c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5333c609719bSwdenk 5334c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5335c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5336c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5337c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5338c609719bSwdenkcommand. 5339c609719bSwdenk 5340c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5341c609719bSwdenkTQM8xxL is in the first Flash bank): 5342c609719bSwdenk 5343c609719bSwdenk => erase 40100000 401FFFFF 5344c609719bSwdenk 5345c609719bSwdenk .......... done 5346c609719bSwdenk Erased 8 sectors 5347c609719bSwdenk 5348c609719bSwdenk => loads 40100000 5349c609719bSwdenk ## Ready for S-Record download ... 5350c609719bSwdenk ~>examples/image.srec 5351c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5352c609719bSwdenk ... 5353c609719bSwdenk 15989 15990 15991 15992 5354c609719bSwdenk [file transfer complete] 5355c609719bSwdenk [connected] 5356c609719bSwdenk ## Start Addr = 0x00000000 5357c609719bSwdenk 5358c609719bSwdenk 5359c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5360c609719bSwdenkthis includes a checksum verification so you can be sure no data 5361c609719bSwdenkcorruption happened: 5362c609719bSwdenk 5363c609719bSwdenk => imi 40100000 5364c609719bSwdenk 5365c609719bSwdenk ## Checking Image at 40100000 ... 5366c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5367c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5368c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5369c609719bSwdenk Load Address: 00000000 5370c609719bSwdenk Entry Point: 0000000c 5371c609719bSwdenk Verifying Checksum ... OK 5372c609719bSwdenk 5373c609719bSwdenk 5374c609719bSwdenkBoot Linux: 5375c609719bSwdenk----------- 5376c609719bSwdenk 5377c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5378c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5379c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5380c609719bSwdenkparameters. You can check and modify this variable using the 5381c609719bSwdenk"printenv" and "setenv" commands: 5382c609719bSwdenk 5383c609719bSwdenk 5384c609719bSwdenk => printenv bootargs 5385c609719bSwdenk bootargs=root=/dev/ram 5386c609719bSwdenk 5387c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5388c609719bSwdenk 5389c609719bSwdenk => printenv bootargs 5390c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5391c609719bSwdenk 5392c609719bSwdenk => bootm 40020000 5393c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5394c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5395c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5396c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5397c609719bSwdenk Load Address: 00000000 5398c609719bSwdenk Entry Point: 0000000c 5399c609719bSwdenk Verifying Checksum ... OK 5400c609719bSwdenk Uncompressing Kernel Image ... OK 5401c609719bSwdenk 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 5402c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5403c609719bSwdenk time_init: decrementer frequency = 187500000/60 5404c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5405c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5406c609719bSwdenk ... 5407c609719bSwdenk 540811ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 54097152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5410c609719bSwdenkformat!) to the "bootm" command: 5411c609719bSwdenk 5412c609719bSwdenk => imi 40100000 40200000 5413c609719bSwdenk 5414c609719bSwdenk ## Checking Image at 40100000 ... 5415c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5416c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5417c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5418c609719bSwdenk Load Address: 00000000 5419c609719bSwdenk Entry Point: 0000000c 5420c609719bSwdenk Verifying Checksum ... OK 5421c609719bSwdenk 5422c609719bSwdenk ## Checking Image at 40200000 ... 5423c609719bSwdenk Image Name: Simple Ramdisk Image 5424c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5425c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5426c609719bSwdenk Load Address: 00000000 5427c609719bSwdenk Entry Point: 00000000 5428c609719bSwdenk Verifying Checksum ... OK 5429c609719bSwdenk 5430c609719bSwdenk => bootm 40100000 40200000 5431c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5432c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5433c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5434c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5435c609719bSwdenk Load Address: 00000000 5436c609719bSwdenk Entry Point: 0000000c 5437c609719bSwdenk Verifying Checksum ... OK 5438c609719bSwdenk Uncompressing Kernel Image ... OK 5439c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5440c609719bSwdenk Image Name: Simple Ramdisk Image 5441c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5442c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5443c609719bSwdenk Load Address: 00000000 5444c609719bSwdenk Entry Point: 00000000 5445c609719bSwdenk Verifying Checksum ... OK 5446c609719bSwdenk Loading Ramdisk ... OK 5447c609719bSwdenk 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 5448c609719bSwdenk Boot arguments: root=/dev/ram 5449c609719bSwdenk time_init: decrementer frequency = 187500000/60 5450c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5451c609719bSwdenk ... 5452c609719bSwdenk RAMDISK: Compressed image found at block 0 5453c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5454c609719bSwdenk 5455c609719bSwdenk bash# 5456c609719bSwdenk 54570267768eSMatthew McClintockBoot Linux and pass a flat device tree: 54580267768eSMatthew McClintock----------- 54590267768eSMatthew McClintock 54600267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 54610267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 54620267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 54630267768eSMatthew McClintockflat device tree: 54640267768eSMatthew McClintock 54650267768eSMatthew McClintock=> print oftaddr 54660267768eSMatthew McClintockoftaddr=0x300000 54670267768eSMatthew McClintock=> print oft 54680267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 54690267768eSMatthew McClintock=> tftp $oftaddr $oft 54700267768eSMatthew McClintockSpeed: 1000, full duplex 54710267768eSMatthew McClintockUsing TSEC0 device 54720267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 54730267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 54740267768eSMatthew McClintockLoad address: 0x300000 54750267768eSMatthew McClintockLoading: # 54760267768eSMatthew McClintockdone 54770267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 54780267768eSMatthew McClintock=> tftp $loadaddr $bootfile 54790267768eSMatthew McClintockSpeed: 1000, full duplex 54800267768eSMatthew McClintockUsing TSEC0 device 54810267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 54820267768eSMatthew McClintockFilename 'uImage'. 54830267768eSMatthew McClintockLoad address: 0x200000 54840267768eSMatthew McClintockLoading:############ 54850267768eSMatthew McClintockdone 54860267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 54870267768eSMatthew McClintock=> print loadaddr 54880267768eSMatthew McClintockloadaddr=200000 54890267768eSMatthew McClintock=> print oftaddr 54900267768eSMatthew McClintockoftaddr=0x300000 54910267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 54920267768eSMatthew McClintock## Booting image at 00200000 ... 54930267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 54940267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 54950267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 54960267768eSMatthew McClintock Load Address: 00000000 54970267768eSMatthew McClintock Entry Point: 00000000 54980267768eSMatthew McClintock Verifying Checksum ... OK 54990267768eSMatthew McClintock Uncompressing Kernel Image ... OK 55000267768eSMatthew McClintockBooting using flat device tree at 0x300000 55010267768eSMatthew McClintockUsing MPC85xx ADS machine description 55020267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 55030267768eSMatthew McClintock[snip] 55040267768eSMatthew McClintock 55050267768eSMatthew McClintock 55066069ff26SwdenkMore About U-Boot Image Types: 55076069ff26Swdenk------------------------------ 55086069ff26Swdenk 55096069ff26SwdenkU-Boot supports the following image types: 55106069ff26Swdenk 55116069ff26Swdenk "Standalone Programs" are directly runnable in the environment 55126069ff26Swdenk provided by U-Boot; it is expected that (if they behave 55136069ff26Swdenk well) you can continue to work in U-Boot after return from 55146069ff26Swdenk the Standalone Program. 55156069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 55166069ff26Swdenk will take over control completely. Usually these programs 55176069ff26Swdenk will install their own set of exception handlers, device 55186069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 55196069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 55206069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 55216069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 55226069ff26Swdenk being started. 55236069ff26Swdenk "Multi-File Images" contain several images, typically an OS 55246069ff26Swdenk (Linux) kernel image and one or more data images like 55256069ff26Swdenk RAMDisks. This construct is useful for instance when you want 55266069ff26Swdenk to boot over the network using BOOTP etc., where the boot 55276069ff26Swdenk server provides just a single image file, but you want to get 55286069ff26Swdenk for instance an OS kernel and a RAMDisk image. 55296069ff26Swdenk 55306069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 55316069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 55326069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 55336069ff26Swdenk Immediately after the terminating 0 follow the images, one by 55346069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 55356069ff26Swdenk a multiple of 4 bytes). 55366069ff26Swdenk 55376069ff26Swdenk "Firmware Images" are binary images containing firmware (like 55386069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 55396069ff26Swdenk flash memory. 55406069ff26Swdenk 55416069ff26Swdenk "Script files" are command sequences that will be executed by 55426069ff26Swdenk U-Boot's command interpreter; this feature is especially 55436069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 55446069ff26Swdenk as command interpreter. 55456069ff26Swdenk 554644f074c7SMarek VasutBooting the Linux zImage: 554744f074c7SMarek Vasut------------------------- 554844f074c7SMarek Vasut 554944f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 555044f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 555144f074c7SMarek Vasutas the syntax of "bootm" command. 555244f074c7SMarek Vasut 55538ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5554017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5555017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5556017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5557017e1f3fSMarek Vasut 5558c609719bSwdenk 5559c609719bSwdenkStandalone HOWTO: 5560c609719bSwdenk================= 5561c609719bSwdenk 5562c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5563c609719bSwdenkrun "standalone" applications, which can use some resources of 5564c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5565c609719bSwdenk 5566c609719bSwdenkTwo simple examples are included with the sources: 5567c609719bSwdenk 5568c609719bSwdenk"Hello World" Demo: 5569c609719bSwdenk------------------- 5570c609719bSwdenk 5571c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5572c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5573c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5574c609719bSwdenklike that: 5575c609719bSwdenk 5576c609719bSwdenk => loads 5577c609719bSwdenk ## Ready for S-Record download ... 5578c609719bSwdenk ~>examples/hello_world.srec 5579c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5580c609719bSwdenk [file transfer complete] 5581c609719bSwdenk [connected] 5582c609719bSwdenk ## Start Addr = 0x00040004 5583c609719bSwdenk 5584c609719bSwdenk => go 40004 Hello World! This is a test. 5585c609719bSwdenk ## Starting application at 0x00040004 ... 5586c609719bSwdenk Hello World 5587c609719bSwdenk argc = 7 5588c609719bSwdenk argv[0] = "40004" 5589c609719bSwdenk argv[1] = "Hello" 5590c609719bSwdenk argv[2] = "World!" 5591c609719bSwdenk argv[3] = "This" 5592c609719bSwdenk argv[4] = "is" 5593c609719bSwdenk argv[5] = "a" 5594c609719bSwdenk argv[6] = "test." 5595c609719bSwdenk argv[7] = "<NULL>" 5596c609719bSwdenk Hit any key to exit ... 5597c609719bSwdenk 5598c609719bSwdenk ## Application terminated, rc = 0x0 5599c609719bSwdenk 5600c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5601c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5602c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5603c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5604c609719bSwdenkcharacter, but this is just a demo program. The application can be 5605c609719bSwdenkcontrolled by the following keys: 5606c609719bSwdenk 5607c609719bSwdenk ? - print current values og the CPM Timer registers 5608c609719bSwdenk b - enable interrupts and start timer 5609c609719bSwdenk e - stop timer and disable interrupts 5610c609719bSwdenk q - quit application 5611c609719bSwdenk 5612c609719bSwdenk => loads 5613c609719bSwdenk ## Ready for S-Record download ... 5614c609719bSwdenk ~>examples/timer.srec 5615c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5616c609719bSwdenk [file transfer complete] 5617c609719bSwdenk [connected] 5618c609719bSwdenk ## Start Addr = 0x00040004 5619c609719bSwdenk 5620c609719bSwdenk => go 40004 5621c609719bSwdenk ## Starting application at 0x00040004 ... 5622c609719bSwdenk TIMERS=0xfff00980 5623c609719bSwdenk Using timer 1 5624c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5625c609719bSwdenk 5626c609719bSwdenkHit 'b': 5627c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5628c609719bSwdenk Enabling timer 5629c609719bSwdenkHit '?': 5630c609719bSwdenk [q, b, e, ?] ........ 5631c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5632c609719bSwdenkHit '?': 5633c609719bSwdenk [q, b, e, ?] . 5634c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5635c609719bSwdenkHit '?': 5636c609719bSwdenk [q, b, e, ?] . 5637c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5638c609719bSwdenkHit '?': 5639c609719bSwdenk [q, b, e, ?] . 5640c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5641c609719bSwdenkHit 'e': 5642c609719bSwdenk [q, b, e, ?] ...Stopping timer 5643c609719bSwdenkHit 'q': 5644c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5645c609719bSwdenk 5646c609719bSwdenk 564785ec0bccSwdenkMinicom warning: 564885ec0bccSwdenk================ 564985ec0bccSwdenk 56507152b1d0SwdenkOver time, many people have reported problems when trying to use the 565185ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 565285ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5653f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 565485ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5655e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5656e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5657e53515a2SKarl O. Pincfor help with kermit. 5658e53515a2SKarl O. Pinc 565985ec0bccSwdenk 566052f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 566152f52c14Swdenkconfiguration to your "File transfer protocols" section: 566252f52c14Swdenk 566352f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 566452f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 566552f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 566652f52c14Swdenk 566752f52c14Swdenk 5668c609719bSwdenkNetBSD Notes: 5669c609719bSwdenk============= 5670c609719bSwdenk 5671c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5672c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5673c609719bSwdenk 5674c609719bSwdenkBuilding requires a cross environment; it is known to work on 5675c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5676c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5677c609719bSwdenkNote that the cross-powerpc package does not install include files; 5678c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5679c609719bSwdenkmissing. This file has to be installed and patched manually: 5680c609719bSwdenk 5681c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5682c609719bSwdenk # mkdir powerpc 5683c609719bSwdenk # ln -s powerpc machine 5684c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5685c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5686c609719bSwdenk 5687c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5688c609719bSwdenkand U-Boot include files. 5689c609719bSwdenk 5690c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5691c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5692c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5693c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 56942a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5695c609719bSwdenk 5696c609719bSwdenk 5697c609719bSwdenkImplementation Internals: 5698c609719bSwdenk========================= 5699c609719bSwdenk 5700c609719bSwdenkThe following is not intended to be a complete description of every 5701c609719bSwdenkimplementation detail. However, it should help to understand the 5702c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5703c609719bSwdenkhardware. 5704c609719bSwdenk 5705c609719bSwdenk 5706c609719bSwdenkInitial Stack, Global Data: 5707c609719bSwdenk--------------------------- 5708c609719bSwdenk 5709c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5710c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5711c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5712c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5713c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5714c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5715c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5716c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5717c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5718c609719bSwdenklocked as (mis-) used as memory, etc. 5719c609719bSwdenk 57207152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 57210668236bSWolfgang Denk U-Boot mailing list: 572243d9616cSwdenk 572343d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 572443d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 572543d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 572643d9616cSwdenk ... 572743d9616cSwdenk 572843d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 572943d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 573043d9616cSwdenk require any physical RAM backing up the cache. The cleverness 573143d9616cSwdenk is that the cache is being used as a temporary supply of 573243d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 573311ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 573443d9616cSwdenk can see how this works by studying the cache architecture and 573543d9616cSwdenk operation in the architecture and processor-specific manuals. 573643d9616cSwdenk 573743d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 573843d9616cSwdenk is another option for the system designer to use as an 573911ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 574043d9616cSwdenk option should work for you. Using CS 4 should be fine if your 574143d9616cSwdenk board designers haven't used it for something that would 574243d9616cSwdenk cause you grief during the initial boot! It is frequently not 574343d9616cSwdenk used. 574443d9616cSwdenk 57456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 574643d9616cSwdenk with your processor/board/system design. The default value 574743d9616cSwdenk you will find in any recent u-boot distribution in 57488a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 574943d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 575043d9616cSwdenk it above 400_0000. Just make sure your board has no resources 575143d9616cSwdenk that are supposed to respond to that address! That code in 575243d9616cSwdenk start.S has been around a while and should work as is when 575343d9616cSwdenk you get the config right. 575443d9616cSwdenk 575543d9616cSwdenk -Chris Hallinan 575643d9616cSwdenk DS4.COM, Inc. 575743d9616cSwdenk 5758c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5759c609719bSwdenkcode for the initialization procedures: 5760c609719bSwdenk 5761c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5762c609719bSwdenk to write it. 5763c609719bSwdenk 576411ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5765c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 57667152b1d0Swdenk zation is performed later (when relocating to RAM). 5767c609719bSwdenk 5768c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5769c609719bSwdenk that. 5770c609719bSwdenk 5771c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5772c609719bSwdenknormal global data to share information beween the code. But it 5773c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5774c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5775c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5776c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5777c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5778c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5779c609719bSwdenkreserve for this purpose. 5780c609719bSwdenk 57817152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5782c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5783c609719bSwdenkGCC's implementation. 5784c609719bSwdenk 5785c609719bSwdenkFor PowerPC, the following registers have specific use: 5786c609719bSwdenk R1: stack pointer 5787e7670f6cSWolfgang Denk R2: reserved for system use 5788c609719bSwdenk R3-R4: parameter passing and return values 5789c609719bSwdenk R5-R10: parameter passing 5790c609719bSwdenk R13: small data area pointer 5791c609719bSwdenk R30: GOT pointer 5792c609719bSwdenk R31: frame pointer 5793c609719bSwdenk 5794e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5795e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5796e6bee808SJoakim Tjernlund going back and forth between asm and C) 5797c609719bSwdenk 5798e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5799c609719bSwdenk 5800c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5801c609719bSwdenk address of the global data structure is known at compile time), 5802c609719bSwdenk but it turned out that reserving a register results in somewhat 5803c609719bSwdenk smaller code - although the code savings are not that big (on 5804c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5805c609719bSwdenk 624 text + 127 data). 5806c609719bSwdenk 5807c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 58084c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 58094c58eb55SMike Frysinger 5810c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 58114c58eb55SMike Frysinger 5812c609719bSwdenkOn ARM, the following registers are used: 5813c609719bSwdenk 5814c609719bSwdenk R0: function argument word/integer result 5815c609719bSwdenk R1-R3: function argument word 581612eba1b4SJeroen Hofstee R9: platform specific 581712eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 5818c609719bSwdenk R11: argument (frame) pointer 5819c609719bSwdenk R12: temporary workspace 5820c609719bSwdenk R13: stack pointer 5821c609719bSwdenk R14: link register 5822c609719bSwdenk R15: program counter 5823c609719bSwdenk 582412eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 582512eba1b4SJeroen Hofstee 582612eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 5827c609719bSwdenk 58280df01fd3SThomas ChouOn Nios II, the ABI is documented here: 58290df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 58300df01fd3SThomas Chou 58310df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 58320df01fd3SThomas Chou 58330df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 58340df01fd3SThomas Chou to access small data sections, so gp is free. 58350df01fd3SThomas Chou 5836afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5837afc1ce82SMacpaul Lin 5838afc1ce82SMacpaul Lin R0-R1: argument/return 5839afc1ce82SMacpaul Lin R2-R5: argument 5840afc1ce82SMacpaul Lin R15: temporary register for assembler 5841afc1ce82SMacpaul Lin R16: trampoline register 5842afc1ce82SMacpaul Lin R28: frame pointer (FP) 5843afc1ce82SMacpaul Lin R29: global pointer (GP) 5844afc1ce82SMacpaul Lin R30: link register (LP) 5845afc1ce82SMacpaul Lin R31: stack pointer (SP) 5846afc1ce82SMacpaul Lin PC: program counter (PC) 5847afc1ce82SMacpaul Lin 5848afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5849afc1ce82SMacpaul Lin 5850d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5851d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5852c609719bSwdenk 5853c609719bSwdenkMemory Management: 5854c609719bSwdenk------------------ 5855c609719bSwdenk 5856c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5857c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5858c609719bSwdenk 5859c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5860c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5861c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5862c609719bSwdenkphysical memory banks. 5863c609719bSwdenk 5864c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5865c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5866c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5867c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 58686d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5869c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5870c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5871c609719bSwdenk 5872c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5873c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5874c609719bSwdenk 5875c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5876c609719bSwdenkthis: 5877c609719bSwdenk 5878c609719bSwdenk 0x0000 0000 Exception Vector code 5879c609719bSwdenk : 5880c609719bSwdenk 0x0000 1FFF 5881c609719bSwdenk 0x0000 2000 Free for Application Use 5882c609719bSwdenk : 5883c609719bSwdenk : 5884c609719bSwdenk 5885c609719bSwdenk : 5886c609719bSwdenk : 5887c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5888c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5889c609719bSwdenk 0x00FC 0000 Malloc Arena 5890c609719bSwdenk : 5891c609719bSwdenk 0x00FD FFFF 5892c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5893c609719bSwdenk ... eventually: LCD or video framebuffer 5894c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5895c609719bSwdenk 0x00FF FFFF [End of RAM] 5896c609719bSwdenk 5897c609719bSwdenk 5898c609719bSwdenkSystem Initialization: 5899c609719bSwdenk---------------------- 5900c609719bSwdenk 5901c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 590211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5903c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 59047152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5905c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5906c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5907c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5908c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5909c609719bSwdenkthe caches and the SIU. 5910c609719bSwdenk 5911c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5912c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5913c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5914c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5915c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5916c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5917c609719bSwdenkbanks. 5918c609719bSwdenk 5919c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 59207152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5921c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5922c609719bSwdenk0x00000000, with any additional banks following immediately to create 5923c609719bSwdenkcontiguous memory starting from 0. 5924c609719bSwdenk 5925c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5926c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5927c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5928c609719bSwdenkpages, and the final stack is set up. 5929c609719bSwdenk 5930c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5931c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5932c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5933c609719bSwdenknew address in RAM. 5934c609719bSwdenk 5935c609719bSwdenk 5936c609719bSwdenkU-Boot Porting Guide: 5937c609719bSwdenk---------------------- 5938c609719bSwdenk 5939c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 59406aff3115Swdenklist, October 2002] 5941c609719bSwdenk 5942c609719bSwdenk 5943c609719bSwdenkint main(int argc, char *argv[]) 5944c609719bSwdenk{ 5945c609719bSwdenk sighandler_t no_more_time; 5946c609719bSwdenk 5947c609719bSwdenk signal(SIGALRM, no_more_time); 5948c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5949c609719bSwdenk 5950c609719bSwdenk if (available_money > available_manpower) { 59516c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5952c609719bSwdenk return 0; 5953c609719bSwdenk } 5954c609719bSwdenk 5955c609719bSwdenk Download latest U-Boot source; 5956c609719bSwdenk 59570668236bSWolfgang Denk Subscribe to u-boot mailing list; 59586aff3115Swdenk 59596c3fef28SJerry Van Baren if (clueless) 5960c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5961c609719bSwdenk 5962c609719bSwdenk while (learning) { 5963c609719bSwdenk Read the README file in the top level directory; 59647cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 59656c3fef28SJerry Van Baren Read applicable doc/*.README; 5966c609719bSwdenk Read the source, Luke; 59676c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5968c609719bSwdenk } 5969c609719bSwdenk 59706c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 59716c3fef28SJerry Van Baren Buy a BDI3000; 59726c3fef28SJerry Van Baren else 5973c609719bSwdenk Add a lot of aggravation and time; 5974c609719bSwdenk 59756c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 59766c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 59776c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 59786c3fef28SJerry Van Baren } else { 5979c609719bSwdenk Create your own board support subdirectory; 59806c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 59816c3fef28SJerry Van Baren } 59826c3fef28SJerry Van Baren Edit new board/<myboard> files 59836c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5984c609719bSwdenk 59856c3fef28SJerry Van Baren while (!accepted) { 5986c609719bSwdenk while (!running) { 5987c609719bSwdenk do { 5988c609719bSwdenk Add / modify source code; 5989c609719bSwdenk } until (compiles); 5990c609719bSwdenk Debug; 5991c609719bSwdenk if (clueless) 5992c609719bSwdenk email("Hi, I am having problems..."); 5993c609719bSwdenk } 59946c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 59956c3fef28SJerry Van Baren if (reasonable critiques) 59966c3fef28SJerry Van Baren Incorporate improvements from email list code review; 59976c3fef28SJerry Van Baren else 59986c3fef28SJerry Van Baren Defend code as written; 59996c3fef28SJerry Van Baren } 6000c609719bSwdenk 6001c609719bSwdenk return 0; 6002c609719bSwdenk} 6003c609719bSwdenk 6004c609719bSwdenkvoid no_more_time (int sig) 6005c609719bSwdenk{ 6006c609719bSwdenk hire_a_guru(); 6007c609719bSwdenk} 6008c609719bSwdenk 6009c609719bSwdenk 6010c609719bSwdenkCoding Standards: 6011c609719bSwdenk----------------- 6012c609719bSwdenk 6013c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 60142c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 60157ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6016c609719bSwdenk 60172c051651SDetlev ZundelSource files originating from a different project (for example the 60182c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 60192c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 60202c051651SDetlev Zundelsources. 60212c051651SDetlev Zundel 60222c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 60232c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 60242c051651SDetlev Zundelin your code. 6025c609719bSwdenk 6026c178d3daSwdenkPlease also stick to the following formatting rules: 6027180d3f74Swdenk- remove any trailing white space 60287ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6029180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 60307ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6031180d3f74Swdenk- do not add trailing empty lines to source files 6032180d3f74Swdenk 6033c609719bSwdenkSubmissions which do not conform to the standards may be returned 6034c609719bSwdenkwith a request to reformat the changes. 6035c609719bSwdenk 6036c609719bSwdenk 6037c609719bSwdenkSubmitting Patches: 6038c609719bSwdenk------------------- 6039c609719bSwdenk 6040c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6041c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6042c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6043c609719bSwdenk 60440d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6045218ca724SWolfgang Denk 60460668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 60470668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 60480668236bSWolfgang Denk 6049c609719bSwdenkWhen you send a patch, please include the following information with 6050c609719bSwdenkit: 6051c609719bSwdenk 6052c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6053c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6054c609719bSwdenk patch actually fixes something. 6055c609719bSwdenk 6056c609719bSwdenk* For new features: a description of the feature and your 6057c609719bSwdenk implementation. 6058c609719bSwdenk 6059c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6060c609719bSwdenk 6061c609719bSwdenk* For major contributions, your entry to the CREDITS file 6062c609719bSwdenk 606327af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 606427af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6065c609719bSwdenk 6066c609719bSwdenk* If your patch adds new configuration options, don't forget to 6067c609719bSwdenk document these in the README file. 6068c609719bSwdenk 6069218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6070218ca724SWolfgang Denk recommended) you can easily generate the patch using the 60717ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6072218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6073218ca724SWolfgang Denk with some other mail clients. 6074c609719bSwdenk 6075218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6076218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6077218ca724SWolfgang Denk GNU diff. 60786dff5529Swdenk 6079218ca724SWolfgang Denk The current directory when running this command shall be the parent 6080218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6081218ca724SWolfgang Denk your patch includes sufficient directory information for the 6082218ca724SWolfgang Denk affected files). 6083218ca724SWolfgang Denk 6084218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6085218ca724SWolfgang Denk and compressed attachments must not be used. 6086c609719bSwdenk 608752f52c14Swdenk* If one logical set of modifications affects or creates several 608852f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 608952f52c14Swdenk 609052f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 609152f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 609252f52c14Swdenk 609352f52c14Swdenk 6094c609719bSwdenkNotes: 6095c609719bSwdenk 6096c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6097c609719bSwdenk source tree and make sure that no errors or warnings are reported 6098c609719bSwdenk for any of the boards. 6099c609719bSwdenk 6100c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6101c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6102c609719bSwdenk returned with a request to re-formatting / split it. 6103c609719bSwdenk 6104c609719bSwdenk* If you modify existing code, make sure that your new code does not 6105c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6106c609719bSwdenk When adding new features, these should compile conditionally only 6107c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6108c609719bSwdenk disabled must not need more memory than the old code without your 6109c609719bSwdenk modification. 611090dc6704Swdenk 61110668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 61120668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 61130668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 61140668236bSWolfgang Denk bigger than the size limit should be avoided. 6115