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 1356eae68e4SMasahiro Yamada /arc Files generic to ARC architecture 1366eae68e4SMasahiro Yamada /cpu CPU specific files 1376eae68e4SMasahiro Yamada /arc700 Files specific to ARC 700 CPUs 1386eae68e4SMasahiro Yamada /lib Architecture specific library files 1398d321b81SPeter Tyser /arm Files generic to ARM architecture 1408d321b81SPeter Tyser /cpu CPU specific files 1418d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1428d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1436eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1448d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1458d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1468d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1478d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1488d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1498d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1508d321b81SPeter Tyser /lib Architecture specific library files 1518d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1528d321b81SPeter Tyser /cpu CPU specific files 1538d321b81SPeter Tyser /lib Architecture specific library files 1548d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1558d321b81SPeter Tyser /cpu CPU specific files 1568d321b81SPeter Tyser /lib Architecture specific library files 1578d321b81SPeter Tyser /m68k Files generic to m68k architecture 1588d321b81SPeter Tyser /cpu CPU specific files 1598d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1608d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1618d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1628d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1638d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1648d321b81SPeter Tyser /lib Architecture specific library files 1658d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1668d321b81SPeter Tyser /cpu CPU specific files 1678d321b81SPeter Tyser /lib Architecture specific library files 1688d321b81SPeter Tyser /mips Files generic to MIPS architecture 1698d321b81SPeter Tyser /cpu CPU specific files 17092bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 1716eae68e4SMasahiro Yamada /mips64 Files specific to MIPS64 CPUs 1728d321b81SPeter Tyser /lib Architecture specific library files 173afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 174afc1ce82SMacpaul Lin /cpu CPU specific files 175afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 176afc1ce82SMacpaul Lin /lib Architecture specific library files 1778d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1788d321b81SPeter Tyser /cpu CPU specific files 1798d321b81SPeter Tyser /lib Architecture specific library files 18033c7731bSRobert P. J. Day /openrisc Files generic to OpenRISC architecture 18133c7731bSRobert P. J. Day /cpu CPU specific files 18233c7731bSRobert P. J. Day /lib Architecture specific library files 183a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1848d321b81SPeter Tyser /cpu CPU specific files 1858d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1868d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1878d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1888d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1898d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 1908d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 1918d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 1928d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 1938d321b81SPeter Tyser /lib Architecture specific library files 1948d321b81SPeter Tyser /sh Files generic to SH architecture 1958d321b81SPeter Tyser /cpu CPU specific files 1968d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 1978d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 1988d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 1998d321b81SPeter Tyser /lib Architecture specific library files 2008d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2018d321b81SPeter Tyser /cpu CPU specific files 2028d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2038d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2048d321b81SPeter Tyser /lib Architecture specific library files 20533c7731bSRobert P. J. Day /x86 Files generic to x86 architecture 20633c7731bSRobert P. J. Day /cpu CPU specific files 20733c7731bSRobert P. J. Day /lib Architecture specific library files 2088d321b81SPeter Tyser/api Machine/arch independent API for external apps 2098d321b81SPeter Tyser/board Board dependent files 2108d321b81SPeter Tyser/common Misc architecture independent functions 2118d321b81SPeter Tyser/disk Code for disk drive partition handling 2128d321b81SPeter Tyser/doc Documentation (don't expect too much) 2138d321b81SPeter Tyser/drivers Commonly used device drivers 21433c7731bSRobert P. J. Day/dts Contains Makefile for building internal U-Boot fdt. 2158d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2168d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2178d321b81SPeter Tyser/include Header Files 2188d321b81SPeter Tyser/lib Files generic to all architectures 2198d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2208d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2218d321b81SPeter Tyser /lzo Library files to support LZO decompression 2228d321b81SPeter Tyser/net Networking code 2238d321b81SPeter Tyser/post Power On Self Test 22433c7731bSRobert P. J. Day/spl Secondary Program Loader framework 2258d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 226c609719bSwdenk 227c609719bSwdenkSoftware Configuration: 228c609719bSwdenk======================= 229c609719bSwdenk 230c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 231c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 232c609719bSwdenk 233c609719bSwdenkThere are two classes of configuration variables: 234c609719bSwdenk 235c609719bSwdenk* Configuration _OPTIONS_: 236c609719bSwdenk These are selectable by the user and have names beginning with 237c609719bSwdenk "CONFIG_". 238c609719bSwdenk 239c609719bSwdenk* Configuration _SETTINGS_: 240c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 241c609719bSwdenk you don't know what you're doing; they have names beginning with 2426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 243c609719bSwdenk 244c609719bSwdenkLater we will add a configuration tool - probably similar to or even 245c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 246c609719bSwdenkdo the configuration by hand, which means creating some symbolic 247c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 248c609719bSwdenkas an example here. 249c609719bSwdenk 250c609719bSwdenk 251c609719bSwdenkSelection of Processor Architecture and Board Type: 252c609719bSwdenk--------------------------------------------------- 253c609719bSwdenk 254c609719bSwdenkFor all supported boards there are ready-to-use default 255ab584d67SHolger Freytherconfigurations available; just type "make <board_name>_defconfig". 256c609719bSwdenk 257c609719bSwdenkExample: For a TQM823L module type: 258c609719bSwdenk 259c609719bSwdenk cd u-boot 260ab584d67SHolger Freyther make TQM823L_defconfig 261c609719bSwdenk 26211ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 263ab584d67SHolger Freythere.g. "make cogent_mpc8xx_defconfig". And also configure the cogent 264c609719bSwdenkdirectory according to the instructions in cogent/README. 265c609719bSwdenk 266c609719bSwdenk 26775b3c3aaSSimon GlassSandbox Environment: 26875b3c3aaSSimon Glass-------------------- 26975b3c3aaSSimon Glass 27075b3c3aaSSimon GlassU-Boot can be built natively to run on a Linux host using the 'sandbox' 27175b3c3aaSSimon Glassboard. This allows feature development which is not board- or architecture- 27275b3c3aaSSimon Glassspecific to be undertaken on a native platform. The sandbox is also used to 27375b3c3aaSSimon Glassrun some of U-Boot's tests. 27475b3c3aaSSimon Glass 27575b3c3aaSSimon GlassSee board/sandbox/sandbox/README.sandbox for more details. 27675b3c3aaSSimon Glass 27775b3c3aaSSimon Glass 278c609719bSwdenkConfiguration Options: 279c609719bSwdenk---------------------- 280c609719bSwdenk 281c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 282c609719bSwdenksuch information is kept in a configuration file 283c609719bSwdenk"include/configs/<board_name>.h". 284c609719bSwdenk 285c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 286c609719bSwdenk"include/configs/TQM823L.h". 287c609719bSwdenk 288c609719bSwdenk 2897f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2907f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2917f6c2cbcSwdenkbuild a config tool - later. 2927f6c2cbcSwdenk 2937f6c2cbcSwdenk 294c609719bSwdenkThe following options need to be configured: 295c609719bSwdenk 2962628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 297c609719bSwdenk 2982628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2996ccec449SWolfgang Denk 3006ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 30109ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 302c609719bSwdenk 303c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 304c609719bSwdenk Define exactly one of 305c609719bSwdenk CONFIG_CMA286_60_OLD 306c609719bSwdenk--- FIXME --- not tested yet: 307c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 308c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 309c609719bSwdenk 310c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 311c609719bSwdenk Define exactly one of 312c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 313c609719bSwdenk 314c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 315c609719bSwdenk Define one or more of 316c609719bSwdenk CONFIG_CMA302 317c609719bSwdenk 318c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 319c609719bSwdenk Define one or more of 320c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 32111ccc33fSMarcel Ziswiler the LCD display every second with 322c609719bSwdenk a "rotator" |\-/|\-/ 323c609719bSwdenk 324cf946c6dSLei Wen- Marvell Family Member 325cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 326cf946c6dSLei Wen multiple fs option at one time 327cf946c6dSLei Wen for marvell soc family 328cf946c6dSLei Wen 329c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 330c609719bSwdenk Define exactly one of 331c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 332c609719bSwdenk 33311ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 33466ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 33566ca92a5Swdenk get_gclk_freq() cannot work 3365da627a4Swdenk e.g. if there is no 32KHz 3375da627a4Swdenk reference PIT/RTC clock 33866ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 33966ca92a5Swdenk or XTAL/EXTAL) 340c609719bSwdenk 34166ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 34466ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 34575d1ea7fSwdenk See doc/README.MPC866 34675d1ea7fSwdenk 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 34875d1ea7fSwdenk 34975d1ea7fSwdenk Define this to measure the actual CPU clock instead 35075d1ea7fSwdenk of relying on the correctness of the configured 35175d1ea7fSwdenk values. Mostly useful for board bringup to make sure 35275d1ea7fSwdenk the PLL is locked at the intended frequency. Note 35375d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 35575d1ea7fSwdenk 356506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 357506f3918SHeiko Schocher 358506f3918SHeiko Schocher Define this option if you want to enable the 359506f3918SHeiko Schocher ICache only when Code runs from RAM. 360506f3918SHeiko Schocher 36166412c63SKumar Gala- 85xx CPU Options: 362ffd06e02SYork Sun CONFIG_SYS_PPC64 363ffd06e02SYork Sun 364ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 365ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 366ffd06e02SYork Sun compliance, among other possible reasons. 367ffd06e02SYork Sun 36866412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36966412c63SKumar Gala 37066412c63SKumar Gala Defines the core time base clock divider ratio compared to the 37166412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 37266412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37366412c63SKumar Gala 3748f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3758f29084aSKumar Gala 3768f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3778f29084aSKumar Gala tree nodes for the given platform. 3788f29084aSKumar Gala 379afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 380afa6b551SPrabhakar Kushwaha 381afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 382afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 383afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 384afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 385afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 386afa6b551SPrabhakar Kushwaha purpose. 387afa6b551SPrabhakar Kushwaha 38833eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 38933eee330SScott Wood 39033eee330SScott Wood Enables a workaround for erratum A004510. If set, 39133eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 39233eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 39333eee330SScott Wood 39433eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 39533eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 39633eee330SScott Wood 39733eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 39833eee330SScott Wood for which the A004510 workaround should be applied. 39933eee330SScott Wood 40033eee330SScott Wood The rest of SVR is either not relevant to the decision 40133eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 40233eee330SScott Wood p2041) or is implied by the build target, which controls 40333eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 40433eee330SScott Wood 40533eee330SScott Wood See Freescale App Note 4493 for more information about 40633eee330SScott Wood this erratum. 40733eee330SScott Wood 40874fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 40974fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 41074fa22edSPrabhakar Kushwaha requred during NOR boot. 41174fa22edSPrabhakar Kushwaha 41233eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 41333eee330SScott Wood 41433eee330SScott Wood This is the value to write into CCSR offset 0x18600 41533eee330SScott Wood according to the A004510 workaround. 41633eee330SScott Wood 41764501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 41864501c66SPriyanka Jain This value denotes start offset of DDR memory which is 41964501c66SPriyanka Jain connected exclusively to the DSP cores. 42064501c66SPriyanka Jain 421765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 422765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 423765b0bdbSPriyanka Jain which is directly connected to the DSP core. 424765b0bdbSPriyanka Jain 42564501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 42664501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 42764501c66SPriyanka Jain connected to the DSP core. 42864501c66SPriyanka Jain 429765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 430765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 431765b0bdbSPriyanka Jain 432b135991aSPriyanka Jain CONFIG_SYS_FSL_SINGLE_SOURCE_CLK 433b135991aSPriyanka Jain Single Source Clock is clocking mode present in some of FSL SoC's. 434b135991aSPriyanka Jain In this mode, a single differential clock is used to supply 435b135991aSPriyanka Jain clocks to the sysclock, ddrclock and usbclock. 436b135991aSPriyanka Jain 437fb4a2409SAneesh Bansal CONFIG_SYS_CPC_REINIT_F 438fb4a2409SAneesh Bansal This CONFIG is defined when the CPC is configured as SRAM at the 439fb4a2409SAneesh Bansal time of U-boot entry and is required to be re-initialized. 440fb4a2409SAneesh Bansal 441aade2004STang Yuantian CONFIG_DEEP_SLEEP 442aade2004STang Yuantian Inidcates this SoC supports deep sleep feature. If deep sleep is 443aade2004STang Yuantian supported, core will start to execute uboot when wakes up. 444aade2004STang Yuantian 4456cb461b4SDaniel Schwierzeck- Generic CPU options: 4462a1680e3SYork Sun CONFIG_SYS_GENERIC_GLOBAL_DATA 4472a1680e3SYork Sun Defines global data is initialized in generic board board_init_f(). 4482a1680e3SYork Sun If this macro is defined, global data is created and cleared in 4492a1680e3SYork Sun generic board board_init_f(). Without this macro, architecture/board 4502a1680e3SYork Sun should initialize global data before calling board_init_f(). 4512a1680e3SYork Sun 4526cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4536cb461b4SDaniel Schwierzeck 4546cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4556cb461b4SDaniel Schwierzeck values is arch specific. 4566cb461b4SDaniel Schwierzeck 4575614e71bSYork Sun CONFIG_SYS_FSL_DDR 4585614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4595614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4605614e71bSYork Sun SoCs. 4615614e71bSYork Sun 4625614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4635614e71bSYork Sun Freescale DDR memory-mapped register base. 4645614e71bSYork Sun 4655614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4665614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4675614e71bSYork Sun deskew training are not available. 4685614e71bSYork Sun 4695614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4705614e71bSYork Sun Freescale DDR1 controller. 4715614e71bSYork Sun 4725614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4735614e71bSYork Sun Freescale DDR2 controller. 4745614e71bSYork Sun 4755614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4765614e71bSYork Sun Freescale DDR3 controller. 4775614e71bSYork Sun 47834e026f9SYork Sun CONFIG_SYS_FSL_DDRC_GEN4 47934e026f9SYork Sun Freescale DDR4 controller. 48034e026f9SYork Sun 4819ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4829ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4839ac4ffbdSYork Sun 4845614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4855614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4865614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4875614e71bSYork Sun implemetation. 4885614e71bSYork Sun 4895614e71bSYork Sun CONFIG_SYS_FSL_DDR2 4905614e71bSYork Sun Board config to use DDR2. It can be eanbeld for SoCs with 4915614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 4925614e71bSYork Sun implementation. 4935614e71bSYork Sun 4945614e71bSYork Sun CONFIG_SYS_FSL_DDR3 4955614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 49634e026f9SYork Sun Freescale DDR3 or DDR3L controllers. 49734e026f9SYork Sun 49834e026f9SYork Sun CONFIG_SYS_FSL_DDR3L 49934e026f9SYork Sun Board config to use DDR3L. It can be enabled for SoCs with 50034e026f9SYork Sun DDR3L controllers. 50134e026f9SYork Sun 50234e026f9SYork Sun CONFIG_SYS_FSL_DDR4 50334e026f9SYork Sun Board config to use DDR4. It can be enabled for SoCs with 50434e026f9SYork Sun DDR4 controllers. 5055614e71bSYork Sun 5061b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 5071b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 5081b4175d6SPrabhakar Kushwaha 5091b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 5101b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 5111b4175d6SPrabhakar Kushwaha 512690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 513690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 514690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 515690e4258SPrabhakar Kushwaha 516690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 517690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 518690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 519690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 520690e4258SPrabhakar Kushwaha 52189ad7be8SPrabhakar Kushwaha CONFIG_SPL_FSL_PBL 52289ad7be8SPrabhakar Kushwaha It adds a target to create boot binary having SPL binary in PBI format 52389ad7be8SPrabhakar Kushwaha concatenated with u-boot binary. 52489ad7be8SPrabhakar Kushwaha 5254e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 5264e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 5274e5b1bd0SYork Sun 5284e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 5294e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 5304e5b1bd0SYork Sun 5316b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 5326b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 5336b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 5346b9e309aSYork Sun it could be different for ARM SoCs. 5356b9e309aSYork Sun 5366b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5376b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5386b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5396b1e1254SYork Sun SoCs with ARM core. 5406b1e1254SYork Sun 5410b953ffcSMarkus Klotzbuecher- Intel Monahans options: 5426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 5430b953ffcSMarkus Klotzbuecher 5440b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 5450b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 5460b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 5470b953ffcSMarkus Klotzbuecher 5486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 5490b953ffcSMarkus Klotzbuecher 5500b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 5510b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 5520b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 5530b953ffcSMarkus Klotzbuecher by this value. 5540b953ffcSMarkus Klotzbuecher 55592bbd64eSDaniel Schwierzeck- MIPS CPU options: 55692bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 55792bbd64eSDaniel Schwierzeck 55892bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 55992bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 56092bbd64eSDaniel Schwierzeck relocation. 56192bbd64eSDaniel Schwierzeck 56292bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 56392bbd64eSDaniel Schwierzeck 56492bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 56592bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 56692bbd64eSDaniel Schwierzeck Possible values are: 56792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 56892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 56992bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 57092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 57192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 57292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 57392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 57492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 57592bbd64eSDaniel Schwierzeck 57692bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 57792bbd64eSDaniel Schwierzeck 57892bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 57992bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 58092bbd64eSDaniel Schwierzeck 58192bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 58292bbd64eSDaniel Schwierzeck 58392bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 58492bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 58592bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 58692bbd64eSDaniel Schwierzeck 587b67d8816SChristian Riesch- ARM options: 588b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 589b67d8816SChristian Riesch 590b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 591b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 592b67d8816SChristian Riesch 5935356f545SAneesh V CONFIG_SYS_THUMB_BUILD 5945356f545SAneesh V 5955356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 5965356f545SAneesh V set for ARM architectures. Thumb instruction set provides 5975356f545SAneesh V better code density. For ARM architectures that support 5985356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 5995356f545SAneesh V GCC. 6005356f545SAneesh V 601c5d4752cSStephen Warren CONFIG_ARM_ERRATA_716044 6020678587fSStephen Warren CONFIG_ARM_ERRATA_742230 6030678587fSStephen Warren CONFIG_ARM_ERRATA_743622 6040678587fSStephen Warren CONFIG_ARM_ERRATA_751472 605f71cbfe3SNitin Garg CONFIG_ARM_ERRATA_794072 606b7588e3bSNitin Garg CONFIG_ARM_ERRATA_761320 6070678587fSStephen Warren 6080678587fSStephen Warren If set, the workarounds for these ARM errata are applied early 6090678587fSStephen Warren during U-Boot startup. Note that these options force the 6100678587fSStephen Warren workarounds to be applied; no CPU-type/version detection 6110678587fSStephen Warren exists, unlike the similar options in the Linux kernel. Do not 6120678587fSStephen Warren set these options unless they apply! 6130678587fSStephen Warren 614795659dcSStephen Warren- CPU timer options: 615795659dcSStephen Warren CONFIG_SYS_HZ 616795659dcSStephen Warren 617795659dcSStephen Warren The frequency of the timer returned by get_timer(). 618795659dcSStephen Warren get_timer() must operate in milliseconds and this CONFIG 619795659dcSStephen Warren option must be set to 1000. 620795659dcSStephen Warren 6215da627a4Swdenk- Linux Kernel Interface: 622c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 623c609719bSwdenk 624c609719bSwdenk U-Boot stores all clock information in Hz 625c609719bSwdenk internally. For binary compatibility with older Linux 626c609719bSwdenk kernels (which expect the clocks passed in the 627c609719bSwdenk bd_info data to be in MHz) the environment variable 628c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 629c609719bSwdenk converts clock data to MHZ before passing it to the 630c609719bSwdenk Linux kernel. 631c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 632c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 633c609719bSwdenk default environment. 634c609719bSwdenk 6355da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 6365da627a4Swdenk 63711ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 6385da627a4Swdenk expect it to be in bytes, others in MB. 6395da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6405da627a4Swdenk 641fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 642f57f70aaSWolfgang Denk 643f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 644213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 645213bf8c8SGerald Van Baren concepts). 646213bf8c8SGerald Van Baren 647213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 648213bf8c8SGerald Van Baren * New libfdt-based support 649213bf8c8SGerald Van Baren * Adds the "fdt" command 6503bb342fcSKim Phillips * The bootm command automatically updates the fdt 651213bf8c8SGerald Van Baren 652b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 653b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 654b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 655b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 656f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 657c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 658f57f70aaSWolfgang Denk 65911ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 66011ccc33fSMarcel Ziswiler addresses 6613bb342fcSKim Phillips 6624e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6634e253137SKumar Gala 6644e253137SKumar Gala Board code has addition modification that it wants to make 6654e253137SKumar Gala to the flat device tree before handing it off to the kernel 6666705d81eSwdenk 6670267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 6680267768eSMatthew McClintock 66911ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 6700267768eSMatthew McClintock param header, the default value is zero if undefined. 6710267768eSMatthew McClintock 6723887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6733887c3fbSHeiko Schocher 6743887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6753887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6763887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6773887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6783887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6793887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6803887c3fbSHeiko Schocher 6817eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6827eb29398SIgor Grinberg 6837eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6847eb29398SIgor Grinberg machine type and must be used to specify the machine type 6857eb29398SIgor Grinberg number as it appears in the ARM machine registry 6867eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6877eb29398SIgor Grinberg Only boards that have multiple machine types supported 6887eb29398SIgor Grinberg in a single configuration file and the machine type is 6897eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6907eb29398SIgor Grinberg 6910b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6920b2f4ecaSNiklaus Giger 6930b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6940b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 6950b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6960b2f4ecaSNiklaus Giger 6970b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 6980b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 6990b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 7000b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 7010b2f4ecaSNiklaus Giger 7020b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 7030b2f4ecaSNiklaus Giger 7040b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 7050b2f4ecaSNiklaus Giger 7060b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 7070b2f4ecaSNiklaus Giger the defaults discussed just above. 7080b2f4ecaSNiklaus Giger 7092c451f78SAneesh V- Cache Configuration: 7102c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 7112c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 7122c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 7132c451f78SAneesh V 71493bc2193SAneesh V- Cache Configuration for ARM: 71593bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 71693bc2193SAneesh V controller 71793bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 71893bc2193SAneesh V controller register space 71993bc2193SAneesh V 7206705d81eSwdenk- Serial Ports: 72148d0192fSAndreas Engel CONFIG_PL010_SERIAL 7226705d81eSwdenk 7236705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 7246705d81eSwdenk 72548d0192fSAndreas Engel CONFIG_PL011_SERIAL 7266705d81eSwdenk 7276705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 7286705d81eSwdenk 7296705d81eSwdenk CONFIG_PL011_CLOCK 7306705d81eSwdenk 7316705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 7326705d81eSwdenk the clock speed of the UARTs. 7336705d81eSwdenk 7346705d81eSwdenk CONFIG_PL01x_PORTS 7356705d81eSwdenk 7366705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 7376705d81eSwdenk define this to a list of base addresses for each (supported) 7386705d81eSwdenk port. See e.g. include/configs/versatile.h 7396705d81eSwdenk 740910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 741910f1ae3SJohn Rigby 742910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 743910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 744910f1ae3SJohn Rigby this variable to initialize the extra register. 745910f1ae3SJohn Rigby 746910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 747910f1ae3SJohn Rigby 748910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 749910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 750910f1ae3SJohn Rigby variable to flush the UART at init time. 751910f1ae3SJohn Rigby 752d57dee57SKaricheri, Muralidharan CONFIG_SERIAL_HW_FLOW_CONTROL 753d57dee57SKaricheri, Muralidharan 754d57dee57SKaricheri, Muralidharan Define this variable to enable hw flow control in serial driver. 755d57dee57SKaricheri, Muralidharan Current user of this option is drivers/serial/nsl16550.c driver 7566705d81eSwdenk 757c609719bSwdenk- Console Interface: 758c609719bSwdenk Depending on board, define exactly one serial port 759c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 760c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 761c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 762c609719bSwdenk 763c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 764c609719bSwdenk port routines must be defined elsewhere 765c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 766c609719bSwdenk 767c609719bSwdenk CONFIG_CFB_CONSOLE 768c609719bSwdenk Enables console device for a color framebuffer. Needs following 769c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 770c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 771c609719bSwdenk (default big endian) 772c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 773c609719bSwdenk rectangle fill 774c609719bSwdenk (cf. smiLynxEM) 775c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 776c609719bSwdenk bit-blit (cf. smiLynxEM) 777c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 778c609719bSwdenk (cols=pitch) 779c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 780c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 781c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 782c609719bSwdenk (0-5, cf. cfb_console.c) 783c609719bSwdenk VIDEO_FB_ADRS framebuffer address 784c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 785c609719bSwdenk (i.e. i8042_kbd_init()) 786c609719bSwdenk VIDEO_TSTC_FCT test char fct 787c609719bSwdenk (i.e. i8042_tstc) 788c609719bSwdenk VIDEO_GETC_FCT get char fct 789c609719bSwdenk (i.e. i8042_getc) 790c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 791c609719bSwdenk (requires blink timer 792c609719bSwdenk cf. i8042.c) 7936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 794c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 795c609719bSwdenk upper right corner 796602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 797c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 798c609719bSwdenk upper left corner 799a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 800a6c7ad2fSwdenk linux_logo.h for logo. 801a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 802c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 80311ccc33fSMarcel Ziswiler additional board info beside 804c609719bSwdenk the logo 805c609719bSwdenk 80633a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 80733a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 80833a35bbbSPali Rohár erase functions and limited graphics rendition control). 80933a35bbbSPali Rohár 810c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 811c609719bSwdenk default i/o. Serial console can be forced with 812c609719bSwdenk environment 'console=serial'. 813c609719bSwdenk 814a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 815a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 816a3ad8e26Swdenk the "silent" environment variable. See 817a3ad8e26Swdenk doc/README.silent for more information. 818a3ad8e26Swdenk 81945ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default 82045ae2546SHeiko Schocher is 0x00. 82145ae2546SHeiko Schocher CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default 82245ae2546SHeiko Schocher is 0xa0. 82345ae2546SHeiko Schocher 824c609719bSwdenk- Console Baudrate: 825c609719bSwdenk CONFIG_BAUDRATE - in bps 826c609719bSwdenk Select one of the baudrates listed in 8276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 8286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 829c609719bSwdenk 830c92fac91SHeiko Schocher- Console Rx buffer length 831c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 832c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 8332b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 834c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 835c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 836c92fac91SHeiko Schocher the SMC. 837c92fac91SHeiko Schocher 8389558b48aSGraeme Russ- Pre-Console Buffer: 8399558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 8409558b48aSGraeme Russ initialised etc) all console output is silently discarded. 8419558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 8429558b48aSGraeme Russ buffer any console messages prior to the console being 8439558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 8449558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 8459558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 8469558b48aSGraeme Russ bytes are output before the console is initialised, the 8479558b48aSGraeme Russ earlier bytes are discarded. 8489558b48aSGraeme Russ 8499558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 8509558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 8519558b48aSGraeme Russ 852046a37bdSSonny Rao- Safe printf() functions 853046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 854046a37bdSSonny Rao the printf() functions. These are defined in 855046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 856046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 857046a37bdSSonny Rao If this option is not given then these functions will 858046a37bdSSonny Rao silently discard their buffer size argument - this means 859046a37bdSSonny Rao you are not getting any overflow checking in this case. 860046a37bdSSonny Rao 861c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 862c609719bSwdenk Delay before automatically booting the default image; 863c609719bSwdenk set to -1 to disable autoboot. 86493d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 86593d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 866c609719bSwdenk 867c609719bSwdenk See doc/README.autoboot for these options that 868c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 869c609719bSwdenk CONFIG_BOOT_RETRY_TIME 870c609719bSwdenk CONFIG_BOOT_RETRY_MIN 871c609719bSwdenk CONFIG_AUTOBOOT_KEYED 872c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 873c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 874c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 875c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 876c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 877c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 878c609719bSwdenk CONFIG_RESET_TO_RETRY 879c609719bSwdenk 880c609719bSwdenk- Autoboot Command: 881c609719bSwdenk CONFIG_BOOTCOMMAND 882c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 883c609719bSwdenk define a command string that is automatically executed 884c609719bSwdenk when no character is read on the console interface 885c609719bSwdenk within "Boot Delay" after reset. 886c609719bSwdenk 887c609719bSwdenk CONFIG_BOOTARGS 888c609719bSwdenk This can be used to pass arguments to the bootm 889c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 890c609719bSwdenk environment value "bootargs". 891c609719bSwdenk 892c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 893c609719bSwdenk The value of these goes into the environment as 894c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 895c609719bSwdenk as a convenience, when switching between booting from 89611ccc33fSMarcel Ziswiler RAM and NFS. 897c609719bSwdenk 898eda0ba38SHeiko Schocher- Bootcount: 899eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 900eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 901eda0ba38SHeiko Schocher cycle, see: 902eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 903eda0ba38SHeiko Schocher 904eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 905eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 906eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 907eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 908eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 909eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 910eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 911eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 912eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 913eda0ba38SHeiko Schocher 914c609719bSwdenk- Pre-Boot Commands: 915c609719bSwdenk CONFIG_PREBOOT 916c609719bSwdenk 917c609719bSwdenk When this option is #defined, the existence of the 918c609719bSwdenk environment variable "preboot" will be checked 919c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 920c609719bSwdenk countdown and/or running the auto-boot command resp. 921c609719bSwdenk entering interactive mode. 922c609719bSwdenk 923c609719bSwdenk This feature is especially useful when "preboot" is 924c609719bSwdenk automatically generated or modified. For an example 925c609719bSwdenk see the LWMON board specific code: here "preboot" is 926c609719bSwdenk modified when the user holds down a certain 927c609719bSwdenk combination of keys on the (special) keyboard when 928c609719bSwdenk booting the systems 929c609719bSwdenk 930c609719bSwdenk- Serial Download Echo Mode: 931c609719bSwdenk CONFIG_LOADS_ECHO 932c609719bSwdenk If defined to 1, all characters received during a 933c609719bSwdenk serial download (using the "loads" command) are 934c609719bSwdenk echoed back. This might be needed by some terminal 935c609719bSwdenk emulations (like "cu"), but may as well just take 936c609719bSwdenk time on others. This setting #define's the initial 937c609719bSwdenk value of the "loads_echo" environment variable. 938c609719bSwdenk 939602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 940c609719bSwdenk CONFIG_KGDB_BAUDRATE 941c609719bSwdenk Select one of the baudrates listed in 9426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 943c609719bSwdenk 944c609719bSwdenk- Monitor Functions: 945602ad3b3SJon Loeliger Monitor commands can be included or excluded 946602ad3b3SJon Loeliger from the build by using the #include files 947c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 948c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 949602ad3b3SJon Loeliger and augmenting with additional #define's 950602ad3b3SJon Loeliger for wanted commands. 951c609719bSwdenk 952602ad3b3SJon Loeliger The default command configuration includes all commands 953602ad3b3SJon Loeliger except those marked below with a "*". 954602ad3b3SJon Loeliger 955b401b73dSMarek Vasut CONFIG_CMD_AES AES 128 CBC encrypt/decrypt 956602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 957602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 958602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 959602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 960602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 961602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 962602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 96308d0d6f3SMichal Simek CONFIG_CMD_CLK * clock command support 964602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 965710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 966602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 967602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 968602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 969a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 970a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 971a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 972a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 973602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 974602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 975246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 976602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 977602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 9785e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 979fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 98088733e2cSAndrew Ruder CONFIG_CMD_ENV_EXISTS * check existence of env variable 9810c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 98203e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 98303e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 98416f4d933SStephen Warren CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) 98516f4d933SStephen Warren that work for multiple fs types 986bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 987602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 98803e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 989602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 990602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 9914d98b5c8SVincent Stehlé CONFIG_CMD_FUSE * Device fuse support 99253fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 993a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 994a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 995bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 996602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 997602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 998602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 999602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 10008fdf1e0fSVipin Kumar CONFIG_CMD_IMLS List all images found in NOR flash 10014d98b5c8SVincent Stehlé CONFIG_CMD_IMLS_NAND * List all images found in NAND flash 1002602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 1003aa53233aSSimon Glass CONFIG_CMD_IOTRACE * I/O tracing for debugging 10040c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 1005c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 1006602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 1007602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 1008602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 1009602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 10104d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 1011d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 1012d22c338eSJoe Hershberger (169.254.*.*) 1013602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 1014602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 10154d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 101602c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 101715a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1018602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1019a2681707SWolfgang Denk loop, loopw 10204d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1021602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1022602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1023602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 102468d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1025602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1026602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10274d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1028e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1029e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1030602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1031602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1032602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1033602ad3b3SJon Loeliger host 1034602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1035ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1036602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1037602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1038d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1039602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1040602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1041602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1042602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1043602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1044602ad3b3SJon Loeliger (4xx only) 1045f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10464d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 104702c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10487d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 104974de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1050602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10517a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10521fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1053da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1054da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1055602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1056602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1057c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10584d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 105989c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1060c609719bSwdenk 1061c609719bSwdenk EXAMPLE: If you want all functions except of network 1062c609719bSwdenk support you can write: 1063c609719bSwdenk 1064602ad3b3SJon Loeliger #include "config_cmd_all.h" 1065602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1066c609719bSwdenk 1067213bf8c8SGerald Van Baren Other Commands: 1068213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1069c609719bSwdenk 1070c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1071602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1072c609719bSwdenk what you (and your U-Boot users) are doing. Data 1073c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1074c609719bSwdenk 8260 (where accesses to the IMMR region must be 1075c609719bSwdenk uncached), and it cannot be disabled on all other 1076c609719bSwdenk systems where we (mis-) use the data cache to hold an 1077c609719bSwdenk initial stack and some data. 1078c609719bSwdenk 1079c609719bSwdenk 1080c609719bSwdenk XXX - this list needs to get updated! 1081c609719bSwdenk 1082a5ecbe62SWolfgang Denk- Regular expression support: 1083a5ecbe62SWolfgang Denk CONFIG_REGEX 1084a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1085a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1086a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1087a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1088a5ecbe62SWolfgang Denk 108945ba8077SSimon Glass- Device tree: 109045ba8077SSimon Glass CONFIG_OF_CONTROL 109145ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 109245ba8077SSimon Glass to configure its devices, instead of relying on statically 109345ba8077SSimon Glass compiled #defines in the board file. This option is 109445ba8077SSimon Glass experimental and only available on a few boards. The device 109545ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 109645ba8077SSimon Glass 10972c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10982c0f79e4SSimon Glass be done using one of the two options below: 1099bbb0b128SSimon Glass 1100bbb0b128SSimon Glass CONFIG_OF_EMBED 1101bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1102bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1103bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1104bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1105bbb0b128SSimon Glass the global data structure as gd->blob. 110645ba8077SSimon Glass 11072c0f79e4SSimon Glass CONFIG_OF_SEPARATE 11082c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 11092c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 11102c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 11112c0f79e4SSimon Glass 11122c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 11132c0f79e4SSimon Glass 11142c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 11152c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 11162c0f79e4SSimon Glass still use the individual files if you need something more 11172c0f79e4SSimon Glass exotic. 11182c0f79e4SSimon Glass 1119c609719bSwdenk- Watchdog: 1120c609719bSwdenk CONFIG_WATCHDOG 1121c609719bSwdenk If this variable is defined, it enables watchdog 11226abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11236abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11246abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11256abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11266abe6fb6SDetlev Zundel available, then no further board specific code should 11276abe6fb6SDetlev Zundel be needed to use it. 11286abe6fb6SDetlev Zundel 11296abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11306abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11316abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11326abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1133c609719bSwdenk 1134c1551ea8Sstroese- U-Boot Version: 1135c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1136c1551ea8Sstroese If this variable is defined, an environment variable 1137c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1138c1551ea8Sstroese version as printed by the "version" command. 1139a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1140a1ea8e51SBenoît Thébaudeau next reset. 1141c1551ea8Sstroese 1142c609719bSwdenk- Real-Time Clock: 1143c609719bSwdenk 1144602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1145c609719bSwdenk has to be selected, too. Define exactly one of the 1146c609719bSwdenk following options: 1147c609719bSwdenk 1148c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1149c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11504e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1151c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11521cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1153c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11547f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 1155412921d2SMarkus Niebel CONFIG_RTC_DS1339 - use Maxim, Inc. DS1339 RTC 11563bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11579536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11584c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 116071d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 116171d19f30SHeiko Schocher RV3029 RTC. 1162c609719bSwdenk 1163b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1164b37c7e5eSwdenk must also be configured. See I2C Support, below. 1165b37c7e5eSwdenk 1166e92739d3SPeter Tyser- GPIO Support: 1167e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1168e92739d3SPeter Tyser 11695dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11705dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11715dec49caSChris Packham pins supported by a particular chip. 11725dec49caSChris Packham 1173e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1174e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1175e92739d3SPeter Tyser 1176aa53233aSSimon Glass- I/O tracing: 1177aa53233aSSimon Glass When CONFIG_IO_TRACE is selected, U-Boot intercepts all I/O 1178aa53233aSSimon Glass accesses and can checksum them or write a list of them out 1179aa53233aSSimon Glass to memory. See the 'iotrace' command for details. This is 1180aa53233aSSimon Glass useful for testing device drivers since it can confirm that 1181aa53233aSSimon Glass the driver behaves the same way before and after a code 1182aa53233aSSimon Glass change. Currently this is supported on sandbox and arm. To 1183aa53233aSSimon Glass add support for your architecture, add '#include <iotrace.h>' 1184aa53233aSSimon Glass to the bottom of arch/<arch>/include/asm/io.h and test. 1185aa53233aSSimon Glass 1186aa53233aSSimon Glass Example output from the 'iotrace stats' command is below. 1187aa53233aSSimon Glass Note that if the trace buffer is exhausted, the checksum will 1188aa53233aSSimon Glass still continue to operate. 1189aa53233aSSimon Glass 1190aa53233aSSimon Glass iotrace is enabled 1191aa53233aSSimon Glass Start: 10000000 (buffer start address) 1192aa53233aSSimon Glass Size: 00010000 (buffer size) 1193aa53233aSSimon Glass Offset: 00000120 (current buffer offset) 1194aa53233aSSimon Glass Output: 10000120 (start + offset) 1195aa53233aSSimon Glass Count: 00000018 (number of trace records) 1196aa53233aSSimon Glass CRC32: 9526fb66 (CRC32 of all trace records) 1197aa53233aSSimon Glass 1198c609719bSwdenk- Timestamp Support: 1199c609719bSwdenk 1200c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1201c609719bSwdenk (date and time) of an image is printed by image 1202c609719bSwdenk commands like bootm or iminfo. This option is 1203602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1204c609719bSwdenk 1205923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1206923c46f9SKarl O. Pinc Zero or more of the following: 1207923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1208923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1209923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1210923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1211923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1212923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1213923c46f9SKarl O. Pinc disk/part_efi.c 1214923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1215c609719bSwdenk 1216602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1217218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1218923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1219c609719bSwdenk 1220c609719bSwdenk- IDE Reset method: 12214d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 12224d13cbadSwdenk board configurations files but used nowhere! 1223c609719bSwdenk 12244d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 12254d13cbadSwdenk be performed by calling the function 12264d13cbadSwdenk ide_set_reset(int reset) 12274d13cbadSwdenk which has to be defined in a board specific file 1228c609719bSwdenk 1229c609719bSwdenk- ATAPI Support: 1230c609719bSwdenk CONFIG_ATAPI 1231c609719bSwdenk 1232c609719bSwdenk Set this to enable ATAPI support. 1233c609719bSwdenk 1234c40b2956Swdenk- LBA48 Support 1235c40b2956Swdenk CONFIG_LBA48 1236c40b2956Swdenk 1237c40b2956Swdenk Set this to enable support for disks larger than 137GB 12384b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1239c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1240c40b2956Swdenk support disks up to 2.1TB. 1241c40b2956Swdenk 12426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1243c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1244c40b2956Swdenk Default is 32bit. 1245c40b2956Swdenk 1246c609719bSwdenk- SCSI Support: 1247c609719bSwdenk At the moment only there is only support for the 1248c609719bSwdenk SYM53C8XX SCSI controller; define 1249c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1250c609719bSwdenk 12516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1254c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1255c609719bSwdenk devices. 12566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1257c609719bSwdenk 1258447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1259447c031bSStefan Reinauer SCSI devices found during the last scan. 1260447c031bSStefan Reinauer 1261c609719bSwdenk- NETWORK Support (PCI): 1262682011ffSwdenk CONFIG_E1000 1263ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1264ce5207e1SKyle Moffett 1265ce5207e1SKyle Moffett CONFIG_E1000_SPI 1266ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1267ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1268ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1269ce5207e1SKyle Moffett 1270ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1271ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1272ce5207e1SKyle Moffett example with the "sspi" command. 1273ce5207e1SKyle Moffett 1274ce5207e1SKyle Moffett CONFIG_CMD_E1000 1275ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1276ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1277682011ffSwdenk 1278ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 127911ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1280ac3315c2SAndre Schwarz 1281c609719bSwdenk CONFIG_EEPRO100 1282c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 128311ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1284c609719bSwdenk write routine for first time initialisation. 1285c609719bSwdenk 1286c609719bSwdenk CONFIG_TULIP 1287c609719bSwdenk Support for Digital 2114x chips. 1288c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1289c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1290c609719bSwdenk 1291c609719bSwdenk CONFIG_NATSEMI 1292c609719bSwdenk Support for National dp83815 chips. 1293c609719bSwdenk 1294c609719bSwdenk CONFIG_NS8382X 1295c609719bSwdenk Support for National dp8382[01] gigabit chips. 1296c609719bSwdenk 129745219c46Swdenk- NETWORK Support (other): 129845219c46Swdenk 1299c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1300c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1301c041e9d2SJens Scharsig 1302c041e9d2SJens Scharsig CONFIG_RMII 1303c041e9d2SJens Scharsig Define this to use reduced MII inteface 1304c041e9d2SJens Scharsig 1305c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1306c041e9d2SJens Scharsig If this defined, the driver is quiet. 1307c041e9d2SJens Scharsig The driver doen't show link status messages. 1308c041e9d2SJens Scharsig 1309efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1310efdd7319SRob Herring Support for the Calxeda XGMAC device 1311efdd7319SRob Herring 13123bb46d23SAshok CONFIG_LAN91C96 131345219c46Swdenk Support for SMSC's LAN91C96 chips. 131445219c46Swdenk 131545219c46Swdenk CONFIG_LAN91C96_BASE 131645219c46Swdenk Define this to hold the physical address 131745219c46Swdenk of the LAN91C96's I/O space 131845219c46Swdenk 131945219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 132045219c46Swdenk Define this to enable 32 bit addressing 132145219c46Swdenk 13223bb46d23SAshok CONFIG_SMC91111 1323f39748aeSwdenk Support for SMSC's LAN91C111 chip 1324f39748aeSwdenk 1325f39748aeSwdenk CONFIG_SMC91111_BASE 1326f39748aeSwdenk Define this to hold the physical address 1327f39748aeSwdenk of the device (I/O space) 1328f39748aeSwdenk 1329f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1330f39748aeSwdenk Define this if data bus is 32 bits 1331f39748aeSwdenk 1332f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1333f39748aeSwdenk Define this to use i/o functions instead of macros 1334f39748aeSwdenk (some hardware wont work with macros) 1335f39748aeSwdenk 1336dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1337dc02badaSHeiko Schocher Support for davinci emac 1338dc02badaSHeiko Schocher 1339dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1340dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1341dc02badaSHeiko Schocher 1342b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1343b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1344b3dbf4a5SMacpaul Lin 1345b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1346b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1347b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1348b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1349b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1350b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1351b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1352b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1353b3dbf4a5SMacpaul Lin 1354c2fff331SMike Rapoport CONFIG_SMC911X 1355557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1356557b377dSJens Gehrlein 1357c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1358557b377dSJens Gehrlein Define this to hold the physical address 1359557b377dSJens Gehrlein of the device (I/O space) 1360557b377dSJens Gehrlein 1361c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1362557b377dSJens Gehrlein Define this if data bus is 32 bits 1363557b377dSJens Gehrlein 1364c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1365557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1366557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1367c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1368557b377dSJens Gehrlein 13693d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13703d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13713d0075faSYoshihiro Shimoda 13723d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13733d0075faSYoshihiro Shimoda Define the number of ports to be used 13743d0075faSYoshihiro Shimoda 13753d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13763d0075faSYoshihiro Shimoda Define the ETH PHY's address 13773d0075faSYoshihiro Shimoda 137868260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 137968260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 138068260aabSYoshihiro Shimoda 13815e124724SVadim Bendebury- TPM Support: 138290899cc0SChe-liang Chiou CONFIG_TPM 138390899cc0SChe-liang Chiou Support TPM devices. 138490899cc0SChe-liang Chiou 13851b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13861b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13871b393db5STom Wai-Hong Tam per system is supported at this time. 13881b393db5STom Wai-Hong Tam 13891b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13901b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13911b393db5STom Wai-Hong Tam 13921b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13931b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13941b393db5STom Wai-Hong Tam 13951b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13961b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13971b393db5STom Wai-Hong Tam 1398c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1399c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1400c01939c7SDirk Eibach 140190899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 14025e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 14035e124724SVadim Bendebury per system is supported at this time. 14045e124724SVadim Bendebury 14055e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 14065e124724SVadim Bendebury Base address where the generic TPM device is mapped 14075e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 14085e124724SVadim Bendebury 0xfed40000. 14095e124724SVadim Bendebury 1410be6c1529SReinhard Pfau CONFIG_CMD_TPM 1411be6c1529SReinhard Pfau Add tpm monitor functions. 1412be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1413be6c1529SReinhard Pfau provides monitor access to authorized functions. 1414be6c1529SReinhard Pfau 1415be6c1529SReinhard Pfau CONFIG_TPM 1416be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1417be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1418be6c1529SReinhard Pfau Requires support for a TPM device. 1419be6c1529SReinhard Pfau 1420be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1421be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1422be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1423be6c1529SReinhard Pfau 1424c609719bSwdenk- USB Support: 1425c609719bSwdenk At the moment only the UHCI host controller is 14264d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1427c609719bSwdenk CONFIG_USB_UHCI to enable it. 1428c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 142930d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1430c609719bSwdenk storage devices. 1431c609719bSwdenk Note: 1432c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1433c609719bSwdenk (TEAC FD-05PUB). 14344d13cbadSwdenk MPC5200 USB requires additional defines: 14354d13cbadSwdenk CONFIG_USB_CLOCK 14364d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1437307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1438307ecb6dSEric Millbrandt for USB on PSC3 14394d13cbadSwdenk CONFIG_USB_CONFIG 14404d13cbadSwdenk for differential drivers: 0x00001000 14414d13cbadSwdenk for single ended drivers: 0x00005000 1442307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1443307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1445fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1446fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14474d13cbadSwdenk 14489ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14499ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14509ab4ce22SSimon Glass 145116c8d5e7SWolfgang Denk- USB Device: 145216c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 145316c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 145416c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 145511ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 145616c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 145716c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 145816c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 145916c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 146016c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 146116c8d5e7SWolfgang Denk a Linux host by 146216c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 146316c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 146416c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 146516c8d5e7SWolfgang Denk might be defined in YourBoardName.h 146616c8d5e7SWolfgang Denk 146716c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 146816c8d5e7SWolfgang Denk Define this to build a UDC device 146916c8d5e7SWolfgang Denk 147016c8d5e7SWolfgang Denk CONFIG_USB_TTY 147116c8d5e7SWolfgang Denk Define this to have a tty type of device available to 147216c8d5e7SWolfgang Denk talk to the UDC device 147316c8d5e7SWolfgang Denk 1474f9da0f89SVipin KUMAR CONFIG_USBD_HS 1475f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1476f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1477f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1478f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1479f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1480f9da0f89SVipin KUMAR speed. 1481f9da0f89SVipin KUMAR 14826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 148316c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 148416c8d5e7SWolfgang Denk be set to usbtty. 148516c8d5e7SWolfgang Denk 148616c8d5e7SWolfgang Denk mpc8xx: 14876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 148816c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 149016c8d5e7SWolfgang Denk 14916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 149216c8d5e7SWolfgang Denk Derive USB clock from brgclk 14936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 149416c8d5e7SWolfgang Denk 149516c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 149616c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 149716c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 149816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 149916c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 150016c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 150116c8d5e7SWolfgang Denk 150216c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 150316c8d5e7SWolfgang Denk Define this string as the name of your company for 150416c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 150516c8d5e7SWolfgang Denk 150616c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 150716c8d5e7SWolfgang Denk Define this string as the name of your product 150816c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 150916c8d5e7SWolfgang Denk 151016c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 151116c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 151216c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 151316c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 151416c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 151516c8d5e7SWolfgang Denk 151616c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 151716c8d5e7SWolfgang Denk Define this as the unique Product ID 151816c8d5e7SWolfgang Denk for your device 151916c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1520c609719bSwdenk 1521d70a560fSIgor Grinberg- ULPI Layer Support: 1522d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1523d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1524d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1525d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1526d70a560fSIgor Grinberg viewport is supported. 1527d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1528d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 15296d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 15306d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 15316d365ea0SLucas Stach the appropriate value in Hz. 1532c609719bSwdenk 1533c609719bSwdenk- MMC Support: 1534c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1535c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1536c609719bSwdenk accessed from the boot prompt by mapping the device 1537c609719bSwdenk to physical memory similar to flash. Command line is 1538602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1539602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1540c609719bSwdenk 1541afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1542afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1543afb35666SYoshihiro Shimoda 1544afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1545afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1546afb35666SYoshihiro Shimoda 1547afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1548afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1549afb35666SYoshihiro Shimoda 15501fd93c6eSPierre Aubert CONFIG_GENERIC_MMC 15511fd93c6eSPierre Aubert Enable the generic MMC driver 15521fd93c6eSPierre Aubert 15531fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_BOOT 15541fd93c6eSPierre Aubert Enable some additional features of the eMMC boot partitions. 15551fd93c6eSPierre Aubert 15561fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_RPMB 15571fd93c6eSPierre Aubert Enable the commands for reading, writing and programming the 15581fd93c6eSPierre Aubert key for the Replay Protection Memory Block partition in eMMC. 15591fd93c6eSPierre Aubert 1560b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1561b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1562b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1563b3ba6e94STom Rini 1564b3ba6e94STom Rini CONFIG_CMD_DFU 1565b3ba6e94STom Rini This enables the command "dfu" which is used to have 1566b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1567b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1568b3ba6e94STom Rini set and define the alt settings to expose to the host. 1569b3ba6e94STom Rini 1570b3ba6e94STom Rini CONFIG_DFU_MMC 1571b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1572b3ba6e94STom Rini 1573c6631764SPantelis Antoniou CONFIG_DFU_NAND 1574c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1575c6631764SPantelis Antoniou 1576a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1577a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1578a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1579a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1580a9479f04SAfzal Mohammed one that would help mostly the developer. 1581a9479f04SAfzal Mohammed 1582e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1583e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1584e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1585e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1586e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1587e7e75c70SHeiko Schocher 1588ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1589ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1590ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1591ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1592ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1593ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1594ea2453d5SPantelis Antoniou 1595001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1596001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1597001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1598001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1599001a8319SHeiko Schocher 1600001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1601001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1602001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1603001a8319SHeiko Schocher sending again an USB request to the device. 1604001a8319SHeiko Schocher 16053aab70afSSebastian Siewior- USB Device Android Fastboot support: 16063aab70afSSebastian Siewior CONFIG_CMD_FASTBOOT 16073aab70afSSebastian Siewior This enables the command "fastboot" which enables the Android 16083aab70afSSebastian Siewior fastboot mode for the platform's USB device. Fastboot is a USB 16093aab70afSSebastian Siewior protocol for downloading images, flashing and device control 16103aab70afSSebastian Siewior used on Android devices. 16113aab70afSSebastian Siewior See doc/README.android-fastboot for more information. 16123aab70afSSebastian Siewior 16133aab70afSSebastian Siewior CONFIG_ANDROID_BOOT_IMAGE 16143aab70afSSebastian Siewior This enables support for booting images which use the Android 16153aab70afSSebastian Siewior image format header. 16163aab70afSSebastian Siewior 16173aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_ADDR 16183aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16193aab70afSSebastian Siewior downloads. Define this to the starting RAM address to use for 16203aab70afSSebastian Siewior downloaded images. 16213aab70afSSebastian Siewior 16223aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_SIZE 16233aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16243aab70afSSebastian Siewior downloads. This buffer should be as large as possible for a 16253aab70afSSebastian Siewior platform. Define this to the size available RAM for fastboot. 16263aab70afSSebastian Siewior 16276705d81eSwdenk- Journaling Flash filesystem support: 16286705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 16296705d81eSwdenk CONFIG_JFFS2_NAND_DEV 16306705d81eSwdenk Define these for a default partition on a NAND device 16316705d81eSwdenk 16326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 16336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 16346705d81eSwdenk Define these for a default partition on a NOR device 16356705d81eSwdenk 16366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 16376705d81eSwdenk Define this to create an own partition. You have to provide a 16386705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 16396705d81eSwdenk 16406705d81eSwdenk If you define only one JFFS2 partition you may also want to 16416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 16426705d81eSwdenk to disable the command chpart. This is the default when you 16436705d81eSwdenk have not defined a custom partition 16446705d81eSwdenk 1645c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1646c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1647656f4c65SDonggeun Kim 1648656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1649656f4c65SDonggeun Kim file in FAT formatted partition. 1650656f4c65SDonggeun Kim 1651656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1652656f4c65SDonggeun Kim user to write files to FAT. 1653c30a15e5SDonggeun Kim 165484cd9327SGabe BlackCBFS (Coreboot Filesystem) support 165584cd9327SGabe Black CONFIG_CMD_CBFS 165684cd9327SGabe Black 165784cd9327SGabe Black Define this to enable support for reading from a Coreboot 165884cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 165984cd9327SGabe Black and cbfsload. 166084cd9327SGabe Black 16614f0d1a2aSSiva Durga Prasad Paladugu- FAT(File Allocation Table) filesystem cluster size: 16624f0d1a2aSSiva Durga Prasad Paladugu CONFIG_FS_FAT_MAX_CLUSTSIZE 16634f0d1a2aSSiva Durga Prasad Paladugu 16644f0d1a2aSSiva Durga Prasad Paladugu Define the max cluster size for fat operations else 16654f0d1a2aSSiva Durga Prasad Paladugu a default value of 65536 will be defined. 16664f0d1a2aSSiva Durga Prasad Paladugu 1667c609719bSwdenk- Keyboard Support: 1668c609719bSwdenk CONFIG_ISA_KEYBOARD 1669c609719bSwdenk 1670c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1671c609719bSwdenk support 1672c609719bSwdenk 1673c609719bSwdenk CONFIG_I8042_KBD 1674c609719bSwdenk Standard PC keyboard driver with US (is default) and 1675c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1676c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1677c609719bSwdenk for cfb_console. Supports cursor blinking. 1678c609719bSwdenk 1679713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1680713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1681713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1682713cb680SHung-ying Tyan which provides key scans on request. 1683713cb680SHung-ying Tyan 1684c609719bSwdenk- Video support: 1685c609719bSwdenk CONFIG_VIDEO 1686c609719bSwdenk 1687c609719bSwdenk Define this to enable video support (for output to 1688c609719bSwdenk video). 1689c609719bSwdenk 1690c609719bSwdenk CONFIG_VIDEO_CT69000 1691c609719bSwdenk 1692c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1693c609719bSwdenk 1694c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1695eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1696eeb1b77bSwdenk video output is selected via environment 'videoout' 1697eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1698eeb1b77bSwdenk assumed. 1699c609719bSwdenk 1700eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 170111ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1702eeb1b77bSwdenk are possible: 1703eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1704eeb1b77bSwdenk Following standard modes are supported (* is default): 1705eeb1b77bSwdenk 1706eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1707eeb1b77bSwdenk -------------+--------------------------------------------- 1708eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1709eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1710eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1711eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1712eeb1b77bSwdenk -------------+--------------------------------------------- 1713c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1714c609719bSwdenk 1715eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 17167817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1717eeb1b77bSwdenk 1718eeb1b77bSwdenk 1719a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1720a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1721a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1722a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1723a6c7ad2fSwdenk 17247d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 17257d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 17267d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 17277d3053fbSTimur Tabi support, and should also define these other macros: 17287d3053fbSTimur Tabi 17297d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 17307d3053fbSTimur Tabi CONFIG_VIDEO 17317d3053fbSTimur Tabi CONFIG_CMD_BMP 17327d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 17337d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 17347d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 17357d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 17367d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 17377d3053fbSTimur Tabi 1738ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1739ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1740ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1741ba8e76bdSTimur Tabi description of this variable. 17427d3053fbSTimur Tabi 1743058d59b0SSimon Glass CONFIG_VIDEO_VGA 1744058d59b0SSimon Glass 1745058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1746058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1747058d59b0SSimon Glass driver. 1748058d59b0SSimon Glass 1749058d59b0SSimon Glass 1750682011ffSwdenk- Keyboard Support: 1751682011ffSwdenk CONFIG_KEYBOARD 1752682011ffSwdenk 1753682011ffSwdenk Define this to enable a custom keyboard support. 1754682011ffSwdenk This simply calls drv_keyboard_init() which must be 1755682011ffSwdenk defined in your board-specific files. 1756682011ffSwdenk The only board using this so far is RBC823. 1757a6c7ad2fSwdenk 1758c609719bSwdenk- LCD Support: CONFIG_LCD 1759c609719bSwdenk 1760c609719bSwdenk Define this to enable LCD support (for output to LCD 1761c609719bSwdenk display); also select one of the supported displays 1762c609719bSwdenk by defining one of these: 1763c609719bSwdenk 176439cf4804SStelian Pop CONFIG_ATMEL_LCD: 176539cf4804SStelian Pop 176639cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 176739cf4804SStelian Pop 1768fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1769c609719bSwdenk 1770fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1771c609719bSwdenk 1772fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1773c609719bSwdenk 1774fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1775fd3103bbSwdenk Active, color, single scan. 1776fd3103bbSwdenk 1777fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1778fd3103bbSwdenk 1779fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1780c609719bSwdenk Active, color, single scan. 1781c609719bSwdenk 1782c609719bSwdenk CONFIG_SHARP_16x9 1783c609719bSwdenk 1784c609719bSwdenk Sharp 320x240. Active, color, single scan. 1785c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1786c609719bSwdenk 1787c609719bSwdenk CONFIG_SHARP_LQ64D341 1788c609719bSwdenk 1789c609719bSwdenk Sharp LQ64D341 display, 640x480. 1790c609719bSwdenk Active, color, single scan. 1791c609719bSwdenk 1792c609719bSwdenk CONFIG_HLD1045 1793c609719bSwdenk 1794c609719bSwdenk HLD1045 display, 640x480. 1795c609719bSwdenk Active, color, single scan. 1796c609719bSwdenk 1797c609719bSwdenk CONFIG_OPTREX_BW 1798c609719bSwdenk 1799c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1800c609719bSwdenk or 1801c609719bSwdenk Hitachi LMG6912RPFC-00T 1802c609719bSwdenk or 1803c609719bSwdenk Hitachi SP14Q002 1804c609719bSwdenk 1805c609719bSwdenk 320x240. Black & white. 1806c609719bSwdenk 1807c609719bSwdenk Normally display is black on white background; define 18086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1809c609719bSwdenk 1810676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1811676d319eSSimon Glass 1812676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1813676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1814676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1815676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1816676d319eSSimon Glass a per-section basis. 1817676d319eSSimon Glass 18180d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 18190d89efefSSimon Glass 18200d89efefSSimon Glass When the console need to be scrolled, this is the number of 18210d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 18220d89efefSSimon Glass the console jump but can help speed up operation when scrolling 18230d89efefSSimon Glass is slow. 1824676d319eSSimon Glass 182545d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 182645d7f525STom Wai-Hong Tam 182745d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 182845d7f525STom Wai-Hong Tam 1829735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1830735987c5STom Wai-Hong Tam 1831735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1832735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1833735987c5STom Wai-Hong Tam 18347152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1835d791b1dcSwdenk 1836d791b1dcSwdenk If this option is set, the environment is checked for 1837d791b1dcSwdenk a variable "splashimage". If found, the usual display 1838d791b1dcSwdenk of logo, copyright and system information on the LCD 1839e94d2cd9Swdenk is suppressed and the BMP image at the address 1840d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1841d791b1dcSwdenk console is redirected to the "nulldev", too. This 1842d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1843d791b1dcSwdenk loaded very quickly after power-on. 1844d791b1dcSwdenk 1845c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1846c0880485SNikita Kiryanov 1847c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1848c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 18491551df35STom Rini (see README.displaying-bmps). 1850c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1851c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1852c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1853c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1854c0880485SNikita Kiryanov there is no need to set this option. 1855c0880485SNikita Kiryanov 18561ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 18571ca298ceSMatthias Weisser 18581ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 18591ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 18601ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 18611ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 18621ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 18631ca298ceSMatthias Weisser specify 'm' for centering the image. 18641ca298ceSMatthias Weisser 18651ca298ceSMatthias Weisser Example: 18661ca298ceSMatthias Weisser setenv splashpos m,m 18671ca298ceSMatthias Weisser => image at center of screen 18681ca298ceSMatthias Weisser 18691ca298ceSMatthias Weisser setenv splashpos 30,20 18701ca298ceSMatthias Weisser => image at x = 30 and y = 20 18711ca298ceSMatthias Weisser 18721ca298ceSMatthias Weisser setenv splashpos -10,m 18731ca298ceSMatthias Weisser => vertically centered image 18741ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 18751ca298ceSMatthias Weisser 187698f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 187798f4a3dfSStefan Roese 187898f4a3dfSStefan Roese If this option is set, additionally to standard BMP 187998f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 188098f4a3dfSStefan Roese splashscreen support or the bmp command. 188198f4a3dfSStefan Roese 1882d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1883d5011762SAnatolij Gustschin 1884d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1885d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1886d5011762SAnatolij Gustschin bmp command. 1887d5011762SAnatolij Gustschin 1888f2b96dfbSLei Wen- Do compresssing for memory range: 1889f2b96dfbSLei Wen CONFIG_CMD_ZIP 1890f2b96dfbSLei Wen 1891f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1892f2b96dfbSLei Wen to compress the specified memory at its best effort. 1893f2b96dfbSLei Wen 1894c29fdfc1Swdenk- Compression support: 18958ef70478SKees Cook CONFIG_GZIP 18968ef70478SKees Cook 18978ef70478SKees Cook Enabled by default to support gzip compressed images. 18988ef70478SKees Cook 1899c29fdfc1Swdenk CONFIG_BZIP2 1900c29fdfc1Swdenk 1901c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1902c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1903c29fdfc1Swdenk compressed images are supported. 1904c29fdfc1Swdenk 1905c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 19066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1907c29fdfc1Swdenk be at least 4MB. 1908d791b1dcSwdenk 1909fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1910fc9c1727SLuigi 'Comio' Mantellini 1911fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1912fc9c1727SLuigi 'Comio' Mantellini images is included. 1913fc9c1727SLuigi 'Comio' Mantellini 1914fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1915fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1916fc9c1727SLuigi 'Comio' Mantellini formula: 1917fc9c1727SLuigi 'Comio' Mantellini 1918fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1919fc9c1727SLuigi 'Comio' Mantellini 1920fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1921fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1922fc9c1727SLuigi 'Comio' Mantellini 1923fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1924fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1925fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1926fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1927fc9c1727SLuigi 'Comio' Mantellini 1928fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1929fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 19306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1931fc9c1727SLuigi 'Comio' Mantellini 19328ef70478SKees Cook CONFIG_LZO 19338ef70478SKees Cook 19348ef70478SKees Cook If this option is set, support for LZO compressed images 19358ef70478SKees Cook is included. 19368ef70478SKees Cook 193717ea1177Swdenk- MII/PHY support: 193817ea1177Swdenk CONFIG_PHY_ADDR 193917ea1177Swdenk 194017ea1177Swdenk The address of PHY on MII bus. 194117ea1177Swdenk 194217ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 194317ea1177Swdenk 194417ea1177Swdenk The clock frequency of the MII bus 194517ea1177Swdenk 194617ea1177Swdenk CONFIG_PHY_GIGE 194717ea1177Swdenk 194817ea1177Swdenk If this option is set, support for speed/duplex 194911ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 195017ea1177Swdenk 195117ea1177Swdenk CONFIG_PHY_RESET_DELAY 195217ea1177Swdenk 195317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 195417ea1177Swdenk reset before any MII register access is possible. 195517ea1177Swdenk For such PHY, set this option to the usec delay 195617ea1177Swdenk required. (minimum 300usec for LXT971A) 195717ea1177Swdenk 195817ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 195917ea1177Swdenk 196017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 196117ea1177Swdenk command issued before MII status register can be read 196217ea1177Swdenk 1963c609719bSwdenk- Ethernet address: 1964c609719bSwdenk CONFIG_ETHADDR 1965c68a05feSrichardretanubun CONFIG_ETH1ADDR 1966c609719bSwdenk CONFIG_ETH2ADDR 1967c609719bSwdenk CONFIG_ETH3ADDR 1968c68a05feSrichardretanubun CONFIG_ETH4ADDR 1969c68a05feSrichardretanubun CONFIG_ETH5ADDR 1970c609719bSwdenk 197111ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 197211ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1973c609719bSwdenk is not determined automatically. 1974c609719bSwdenk 1975c609719bSwdenk- IP address: 1976c609719bSwdenk CONFIG_IPADDR 1977c609719bSwdenk 1978c609719bSwdenk Define a default value for the IP address to use for 197911ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1980c609719bSwdenk determined through e.g. bootp. 19811ebcd654SWolfgang Denk (Environment variable "ipaddr") 1982c609719bSwdenk 1983c609719bSwdenk- Server IP address: 1984c609719bSwdenk CONFIG_SERVERIP 1985c609719bSwdenk 1986c609719bSwdenk Defines a default value for the IP address of a TFTP 1987c609719bSwdenk server to contact when using the "tftboot" command. 19881ebcd654SWolfgang Denk (Environment variable "serverip") 1989c609719bSwdenk 199097cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 199197cfe861SRobin Getz 199297cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 199397cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 199497cfe861SRobin Getz 19951ebcd654SWolfgang Denk- Gateway IP address: 19961ebcd654SWolfgang Denk CONFIG_GATEWAYIP 19971ebcd654SWolfgang Denk 19981ebcd654SWolfgang Denk Defines a default value for the IP address of the 19991ebcd654SWolfgang Denk default router where packets to other networks are 20001ebcd654SWolfgang Denk sent to. 20011ebcd654SWolfgang Denk (Environment variable "gatewayip") 20021ebcd654SWolfgang Denk 20031ebcd654SWolfgang Denk- Subnet mask: 20041ebcd654SWolfgang Denk CONFIG_NETMASK 20051ebcd654SWolfgang Denk 20061ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 20071ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 20081ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 20091ebcd654SWolfgang Denk forwarded through a router. 20101ebcd654SWolfgang Denk (Environment variable "netmask") 20111ebcd654SWolfgang Denk 201253a5c424SDavid Updegraff- Multicast TFTP Mode: 201353a5c424SDavid Updegraff CONFIG_MCAST_TFTP 201453a5c424SDavid Updegraff 201553a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 201653a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 201711ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 201853a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 201953a5c424SDavid Updegraff multicast group. 202053a5c424SDavid Updegraff 2021c609719bSwdenk- BOOTP Recovery Mode: 2022c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 2023c609719bSwdenk 2024c609719bSwdenk If you have many targets in a network that try to 2025c609719bSwdenk boot using BOOTP, you may want to avoid that all 2026c609719bSwdenk systems send out BOOTP requests at precisely the same 2027c609719bSwdenk moment (which would happen for instance at recovery 2028c609719bSwdenk from a power failure, when all systems will try to 2029c609719bSwdenk boot, thus flooding the BOOTP server. Defining 2030c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 2031c609719bSwdenk inserted before sending out BOOTP requests. The 20326c33c785SWolfgang Denk following delays are inserted then: 2033c609719bSwdenk 2034c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 2035c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 2036c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 2037c609719bSwdenk 4th and following 2038c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 2039c609719bSwdenk 204092ac8accSThierry Reding CONFIG_BOOTP_ID_CACHE_SIZE 204192ac8accSThierry Reding 204292ac8accSThierry Reding BOOTP packets are uniquely identified using a 32-bit ID. The 204392ac8accSThierry Reding server will copy the ID from client requests to responses and 204492ac8accSThierry Reding U-Boot will use this to determine if it is the destination of 204592ac8accSThierry Reding an incoming response. Some servers will check that addresses 204692ac8accSThierry Reding aren't in use before handing them out (usually using an ARP 204792ac8accSThierry Reding ping) and therefore take up to a few hundred milliseconds to 204892ac8accSThierry Reding respond. Network congestion may also influence the time it 204992ac8accSThierry Reding takes for a response to make it back to the client. If that 205092ac8accSThierry Reding time is too long, U-Boot will retransmit requests. In order 205192ac8accSThierry Reding to allow earlier responses to still be accepted after these 205292ac8accSThierry Reding retransmissions, U-Boot's BOOTP client keeps a small cache of 205392ac8accSThierry Reding IDs. The CONFIG_BOOTP_ID_CACHE_SIZE controls the size of this 205492ac8accSThierry Reding cache. The default is to keep IDs for up to four outstanding 205592ac8accSThierry Reding requests. Increasing this will allow U-Boot to accept offers 205692ac8accSThierry Reding from a BOOTP client in networks with unusually high latency. 205792ac8accSThierry Reding 2058fe389a82Sstroese- DHCP Advanced Options: 20591fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 20601fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 2061fe389a82Sstroese 20621fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 20631fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 20641fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 20651fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 20661fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 20671fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 20681fe80d79SJon Loeliger CONFIG_BOOTP_DNS 20691fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 20701fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 20711fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 20721fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 20731fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 20742c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 2075fe389a82Sstroese 20765d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 20775d110f0aSWilson Callan environment variable, not the BOOTP server. 2078fe389a82Sstroese 20792c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 20802c00e099SJoe Hershberger after the configured retry count, the call will fail 20812c00e099SJoe Hershberger instead of starting over. This can be used to fail over 20822c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 20832c00e099SJoe Hershberger is not available. 20842c00e099SJoe Hershberger 2085fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 2086fe389a82Sstroese serverip from a DHCP server, it is possible that more 2087fe389a82Sstroese than one DNS serverip is offered to the client. 2088fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2089fe389a82Sstroese serverip will be stored in the additional environment 2090fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2091fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 20921fe80d79SJon Loeliger is defined. 2093fe389a82Sstroese 2094fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2095fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2096fe389a82Sstroese need the hostname of the DHCP requester. 20975d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 20981fe80d79SJon Loeliger of the "hostname" environment variable is passed as 20991fe80d79SJon Loeliger option 12 to the DHCP server. 2100fe389a82Sstroese 2101d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2102d9a2f416SAras Vaichas 2103d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2104d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2105d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2106d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2107d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2108d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2109d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2110d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2111d9a2f416SAras Vaichas that one of the retries will be successful but note that 2112d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2113d9a2f416SAras Vaichas this delay. 2114d9a2f416SAras Vaichas 2115d22c338eSJoe Hershberger - Link-local IP address negotiation: 2116d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2117d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2118d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2119d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2120d22c338eSJoe Hershberger 2121d22c338eSJoe Hershberger See doc/README.link-local for more information. 2122d22c338eSJoe Hershberger 2123a3d991bdSwdenk - CDP Options: 2124a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2125a3d991bdSwdenk 2126a3d991bdSwdenk The device id used in CDP trigger frames. 2127a3d991bdSwdenk 2128a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2129a3d991bdSwdenk 2130a3d991bdSwdenk A two character string which is prefixed to the MAC address 2131a3d991bdSwdenk of the device. 2132a3d991bdSwdenk 2133a3d991bdSwdenk CONFIG_CDP_PORT_ID 2134a3d991bdSwdenk 2135a3d991bdSwdenk A printf format string which contains the ascii name of 2136a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 213711ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2138a3d991bdSwdenk 2139a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2140a3d991bdSwdenk 2141a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2142a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2143a3d991bdSwdenk 2144a3d991bdSwdenk CONFIG_CDP_VERSION 2145a3d991bdSwdenk 2146a3d991bdSwdenk An ascii string containing the version of the software. 2147a3d991bdSwdenk 2148a3d991bdSwdenk CONFIG_CDP_PLATFORM 2149a3d991bdSwdenk 2150a3d991bdSwdenk An ascii string containing the name of the platform. 2151a3d991bdSwdenk 2152a3d991bdSwdenk CONFIG_CDP_TRIGGER 2153a3d991bdSwdenk 2154a3d991bdSwdenk A 32bit integer sent on the trigger. 2155a3d991bdSwdenk 2156a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2157a3d991bdSwdenk 2158a3d991bdSwdenk A 16bit integer containing the power consumption of the 2159a3d991bdSwdenk device in .1 of milliwatts. 2160a3d991bdSwdenk 2161a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2162a3d991bdSwdenk 2163a3d991bdSwdenk A byte containing the id of the VLAN. 2164a3d991bdSwdenk 2165c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2166c609719bSwdenk 2167c609719bSwdenk Several configurations allow to display the current 2168c609719bSwdenk status using a LED. For instance, the LED will blink 2169c609719bSwdenk fast while running U-Boot code, stop blinking as 2170c609719bSwdenk soon as a reply to a BOOTP request was received, and 2171c609719bSwdenk start blinking slow once the Linux kernel is running 2172c609719bSwdenk (supported by a status LED driver in the Linux 2173c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2174c609719bSwdenk feature in U-Boot. 2175c609719bSwdenk 21761df7bbbaSIgor Grinberg Additional options: 21771df7bbbaSIgor Grinberg 21781df7bbbaSIgor Grinberg CONFIG_GPIO_LED 21791df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 21801df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 21811df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 21821df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 21831df7bbbaSIgor Grinberg 21849dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 21859dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 21869dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 21879dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 21889dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 21899dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 21909dfdcdfeSIgor Grinberg 2191c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2192c609719bSwdenk 2193c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2194c609719bSwdenk on those systems that support this (optional) 2195c609719bSwdenk feature, like the TQM8xxL modules. 2196c609719bSwdenk 21973f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2198c609719bSwdenk 21993f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 22003f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 22013f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 22023f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 22033f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 22043f4978c7SHeiko Schocher interface. 22053f4978c7SHeiko Schocher 22063f4978c7SHeiko Schocher ported i2c driver to the new framework: 2207ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2208ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2209ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2210ea818dbbSHeiko Schocher for defining speed and slave address 2211ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2212ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2213ea818dbbSHeiko Schocher for defining speed and slave address 2214ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2215ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2216ea818dbbSHeiko Schocher for defining speed and slave address 2217ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2218ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2219ea818dbbSHeiko Schocher for defining speed and slave address 22203f4978c7SHeiko Schocher 222100f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 222200f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 222300f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 222400f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 222500f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 222600f792e0SHeiko Schocher bus. 222700f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 222800f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 222900f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 223000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 223100f792e0SHeiko Schocher second bus. 223200f792e0SHeiko Schocher 22331f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 22341f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 22351f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 22361f2ba722SSimon Glass 100000 and the slave addr 0! 22371f2ba722SSimon Glass 2238880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2239880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2240880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2241880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2242880540deSDirk Eibach 2243fac96408Strem - drivers/i2c/i2c_mxc.c 2244fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2245fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2246fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2247fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2248fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2249fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2250fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2251fac96408Strem If thoses defines are not set, default value is 100000 2252fac96408Strem for speed, and 0 for slave. 2253fac96408Strem 22541086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 22551086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 22561086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 22571086bfa9SNobuhiro Iwamatsu 22581086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 22591086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 22601086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 22611086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 22621086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 22631086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 22641086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 22651086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 22661086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 22671086bfa9SNobuhiro Iwamatsu 22682035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 22692035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 22702035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 22712035d77dSNobuhiro Iwamatsu 22722035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 22732035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 22742035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 22752035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 22762035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 22772035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 22782035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 22792035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 22802035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 22812035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 22822035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 22832035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 22842035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 22852035d77dSNobuhiro Iwamatsu 22866789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 22876789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 22886789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 22896789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 22906789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 22916789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 22926789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 22936789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 22946789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 22956789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 22966789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 22976789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 22986789e84eSHeiko Schocher 22990bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 23000bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 23010bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 23020bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 23030bdffe71SHeiko Schocher 2304e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2305e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2306e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2307e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2308e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2309e717fc6dSNaveen Krishna Ch 2310b46226bdSDirk Eibach - drivers/i2c/ihs_i2c.c 2311b46226bdSDirk Eibach - activate this driver with CONFIG_SYS_I2C_IHS 2312b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0 2313b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0 2314b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0 2315b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1 2316b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1 2317b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1 2318b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2 2319b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2 2320b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2 2321b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3 2322b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3 2323b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3 2324b46226bdSDirk Eibach 23253f4978c7SHeiko Schocher additional defines: 23263f4978c7SHeiko Schocher 23273f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 23283f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 23293f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 23303f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 23313f4978c7SHeiko Schocher omit this define. 23323f4978c7SHeiko Schocher 23333f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 23343f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 23353f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 23363f4978c7SHeiko Schocher omit this define. 23373f4978c7SHeiko Schocher 23383f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 23393f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 23403f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 23413f4978c7SHeiko Schocher define. 23423f4978c7SHeiko Schocher 23433f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 23443f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 23453f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 23463f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 23473f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 23483f4978c7SHeiko Schocher 23493f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 23503f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 23513f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 23523f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 23533f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 23543f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 23553f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 23563f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 23573f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 23583f4978c7SHeiko Schocher } 23593f4978c7SHeiko Schocher 23603f4978c7SHeiko Schocher which defines 23613f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2362ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2363ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2364ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2365ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2366ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 23673f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2368ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2369ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 23703f4978c7SHeiko Schocher 23713f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 23723f4978c7SHeiko Schocher 2373ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 23743f4978c7SHeiko Schocher 23753f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 23763f4978c7SHeiko Schocher provides the following compelling advantages: 23773f4978c7SHeiko Schocher 23783f4978c7SHeiko Schocher - more than one i2c adapter is usable 23793f4978c7SHeiko Schocher - approved multibus support 23803f4978c7SHeiko Schocher - better i2c mux support 23813f4978c7SHeiko Schocher 23823f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 23833f4978c7SHeiko Schocher 2384ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2385ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2386ea818dbbSHeiko Schocher for the selected CPU. 2387c609719bSwdenk 2388b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2389602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2390b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2391b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2392c609719bSwdenk command line interface. 2393c609719bSwdenk 2394bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2395c609719bSwdenk 2396b37c7e5eSwdenk There are several other quantities that must also be 2397ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2398c609719bSwdenk 23996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2400b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 24016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 240211ccc33fSMarcel Ziswiler the CPU's i2c node address). 2403c609719bSwdenk 24048d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2405a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 24068d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 24078d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 24088d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2409b37c7e5eSwdenk 24105da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 24115da71efaSEric Millbrandt 24125da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 24135da71efaSEric Millbrandt chips might think that the current transfer is still 24145da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 24155da71efaSEric Millbrandt commands until the slave device responds. 24165da71efaSEric Millbrandt 2417b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2418b37c7e5eSwdenk 2419ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2420b37c7e5eSwdenk then the following macros need to be defined (examples are 2421b37c7e5eSwdenk from include/configs/lwmon.h): 2422c609719bSwdenk 2423c609719bSwdenk I2C_INIT 2424c609719bSwdenk 2425b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2426c609719bSwdenk controller or configure ports. 2427c609719bSwdenk 2428b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2429b37c7e5eSwdenk 2430c609719bSwdenk I2C_PORT 2431c609719bSwdenk 2432c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2433c609719bSwdenk assumes both bits are on the same port). Valid values 2434c609719bSwdenk are 0..3 for ports A..D. 2435c609719bSwdenk 2436c609719bSwdenk I2C_ACTIVE 2437c609719bSwdenk 2438c609719bSwdenk The code necessary to make the I2C data line active 2439c609719bSwdenk (driven). If the data line is open collector, this 2440c609719bSwdenk define can be null. 2441c609719bSwdenk 2442b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2443b37c7e5eSwdenk 2444c609719bSwdenk I2C_TRISTATE 2445c609719bSwdenk 2446c609719bSwdenk The code necessary to make the I2C data line tri-stated 2447c609719bSwdenk (inactive). If the data line is open collector, this 2448c609719bSwdenk define can be null. 2449c609719bSwdenk 2450b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2451b37c7e5eSwdenk 2452c609719bSwdenk I2C_READ 2453c609719bSwdenk 2454472d5460SYork Sun Code that returns true if the I2C data line is high, 2455472d5460SYork Sun false if it is low. 2456c609719bSwdenk 2457b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2458b37c7e5eSwdenk 2459c609719bSwdenk I2C_SDA(bit) 2460c609719bSwdenk 2461472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2462472d5460SYork Sun is false, it clears it (low). 2463c609719bSwdenk 2464b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2465b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2466b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2467b37c7e5eSwdenk 2468c609719bSwdenk I2C_SCL(bit) 2469c609719bSwdenk 2470472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2471472d5460SYork Sun is false, it clears it (low). 2472c609719bSwdenk 2473b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2474b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2475b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2476b37c7e5eSwdenk 2477c609719bSwdenk I2C_DELAY 2478c609719bSwdenk 2479c609719bSwdenk This delay is invoked four times per clock cycle so this 2480c609719bSwdenk controls the rate of data transfer. The data rate thus 2481b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2482b37c7e5eSwdenk like: 2483b37c7e5eSwdenk 2484b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2485c609719bSwdenk 2486793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2487793b5726SMike Frysinger 2488793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2489793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2490793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2491793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2492793b5726SMike Frysinger 2493793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2494793b5726SMike Frysinger the generic GPIO functions. 2495793b5726SMike Frysinger 24966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 249747cd00faSwdenk 249847cd00faSwdenk When a board is reset during an i2c bus transfer 249947cd00faSwdenk chips might think that the current transfer is still 250047cd00faSwdenk in progress. On some boards it is possible to access 250147cd00faSwdenk the i2c SCLK line directly, either by using the 250247cd00faSwdenk processor pin as a GPIO or by having a second pin 250347cd00faSwdenk connected to the bus. If this option is defined a 250447cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 250547cd00faSwdenk is run early in the boot sequence. 250647cd00faSwdenk 250726a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 250826a33504SRichard Retanubun 250926a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 251026a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 251126a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 251226a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 251326a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 251426a33504SRichard Retanubun controller provide such a method. It is called at the end of 251526a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 251626a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 251726a33504SRichard Retanubun 251817ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 251917ea1177Swdenk 252017ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 252117ea1177Swdenk in u-boot bd_info structure based on u-boot environment 252217ea1177Swdenk variable "i2cfast". (see also i2cfast) 252317ea1177Swdenk 2524bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2525bb99ad6dSBen Warren 2526bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2527bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2528bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2529bb99ad6dSBen Warren Note that bus numbering is zero-based. 2530bb99ad6dSBen Warren 25316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2532bb99ad6dSBen Warren 2533bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 25340f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 25350f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 25360f89c54bSPeter Tyser a 1D array of device addresses 2537bb99ad6dSBen Warren 2538bb99ad6dSBen Warren e.g. 2539bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 25406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2541bb99ad6dSBen Warren 2542bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2543bb99ad6dSBen Warren 2544bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 25456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2546bb99ad6dSBen Warren 2547bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2548bb99ad6dSBen Warren 25496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2550be5e6181STimur Tabi 2551be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2552be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2553be5e6181STimur Tabi 25546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 25550dc018ecSStefan Roese 25560dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 25570dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 25580dc018ecSStefan Roese 25596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 25600dc018ecSStefan Roese 25610dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 25620dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 25630dc018ecSStefan Roese 25646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 25659ebbb54fSVictor Gallardo 25669ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 25679ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 25689ebbb54fSVictor Gallardo specified DTT device. 25699ebbb54fSVictor Gallardo 25702ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 25712ac6985aSAndrew Dyer 25722ac6985aSAndrew Dyer defining this will force the i2c_read() function in 25732ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 25742ac6985aSAndrew Dyer between writing the address pointer and reading the 25752ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 25762ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 25772ac6985aSAndrew Dyer devices can use either method, but some require one or 25782ac6985aSAndrew Dyer the other. 2579be5e6181STimur Tabi 2580c609719bSwdenk- SPI Support: CONFIG_SPI 2581c609719bSwdenk 2582c609719bSwdenk Enables SPI driver (so far only tested with 2583c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2584c609719bSwdenk D/As on the SACSng board) 2585c609719bSwdenk 25866639562eSYoshihiro Shimoda CONFIG_SH_SPI 25876639562eSYoshihiro Shimoda 25886639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 25896639562eSYoshihiro Shimoda only SH7757 is supported. 25906639562eSYoshihiro Shimoda 2591c609719bSwdenk CONFIG_SPI_X 2592c609719bSwdenk 2593c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2594c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2595c609719bSwdenk 2596c609719bSwdenk CONFIG_SOFT_SPI 2597c609719bSwdenk 2598c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2599c609719bSwdenk using hardware support. This is a general purpose 2600c609719bSwdenk driver that only requires three general I/O port pins 2601c609719bSwdenk (two outputs, one input) to function. If this is 2602c609719bSwdenk defined, the board configuration must define several 2603c609719bSwdenk SPI configuration items (port pins to use, etc). For 2604c609719bSwdenk an example, see include/configs/sacsng.h. 2605c609719bSwdenk 260604a9e118SBen Warren CONFIG_HARD_SPI 260704a9e118SBen Warren 260804a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 260904a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 261004a9e118SBen Warren must define a list of chip-select function pointers. 261104a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 261204a9e118SBen Warren example, see include/configs/mpc8349emds.h. 261304a9e118SBen Warren 261438254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 261538254f45SGuennadi Liakhovetski 261638254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 26172e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 261838254f45SGuennadi Liakhovetski 2619f659b573SHeiko Schocher CONFIG_SYS_SPI_MXC_WAIT 2620f659b573SHeiko Schocher Timeout for waiting until spi transfer completed. 2621f659b573SHeiko Schocher default: (CONFIG_SYS_HZ/100) /* 10 ms */ 2622f659b573SHeiko Schocher 26230133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 26240133502eSMatthias Fuchs 26250133502eSMatthias Fuchs Enables FPGA subsystem. 26260133502eSMatthias Fuchs 26270133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 26280133502eSMatthias Fuchs 26290133502eSMatthias Fuchs Enables support for specific chip vendors. 26300133502eSMatthias Fuchs (ALTERA, XILINX) 26310133502eSMatthias Fuchs 26320133502eSMatthias Fuchs CONFIG_FPGA_<family> 26330133502eSMatthias Fuchs 26340133502eSMatthias Fuchs Enables support for FPGA family. 26350133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 26360133502eSMatthias Fuchs 26370133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2638c609719bSwdenk 2639c609719bSwdenk Specify the number of FPGA devices to support. 2640c609719bSwdenk 264164e809afSSiva Durga Prasad Paladugu CONFIG_CMD_FPGA_LOADMK 264264e809afSSiva Durga Prasad Paladugu 264364e809afSSiva Durga Prasad Paladugu Enable support for fpga loadmk command 264464e809afSSiva Durga Prasad Paladugu 264567193864SMichal Simek CONFIG_CMD_FPGA_LOADP 264667193864SMichal Simek 264767193864SMichal Simek Enable support for fpga loadp command - load partial bitstream 264867193864SMichal Simek 264967193864SMichal Simek CONFIG_CMD_FPGA_LOADBP 265067193864SMichal Simek 265167193864SMichal Simek Enable support for fpga loadbp command - load partial bitstream 265267193864SMichal Simek (Xilinx only) 265367193864SMichal Simek 26546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2655c609719bSwdenk 2656c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2657c609719bSwdenk 26586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2659c609719bSwdenk 2660c609719bSwdenk Enable checks on FPGA configuration interface busy 2661c609719bSwdenk status by the configuration function. This option 2662c609719bSwdenk will require a board or device specific function to 2663c609719bSwdenk be written. 2664c609719bSwdenk 2665c609719bSwdenk CONFIG_FPGA_DELAY 2666c609719bSwdenk 2667c609719bSwdenk If defined, a function that provides delays in the FPGA 2668c609719bSwdenk configuration driver. 2669c609719bSwdenk 26706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2671c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2672c609719bSwdenk 26736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2674c609719bSwdenk 2675c609719bSwdenk Check for configuration errors during FPGA bitfile 2676c609719bSwdenk loading. For example, abort during Virtex II 2677c609719bSwdenk configuration if the INIT_B line goes low (which 2678c609719bSwdenk indicated a CRC error). 2679c609719bSwdenk 26806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2681c609719bSwdenk 2682c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2683c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2684c609719bSwdenk FPGA configuration sequence. The default time is 500 268511ccc33fSMarcel Ziswiler ms. 2686c609719bSwdenk 26876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2688c609719bSwdenk 2689c609719bSwdenk Maximum time to wait for BUSY to deassert during 269011ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2691c609719bSwdenk 26926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2693c609719bSwdenk 2694c609719bSwdenk Time to wait after FPGA configuration. The default is 269511ccc33fSMarcel Ziswiler 200 ms. 2696c609719bSwdenk 2697c609719bSwdenk- Configuration Management: 2698c609719bSwdenk CONFIG_IDENT_STRING 2699c609719bSwdenk 2700c609719bSwdenk If defined, this string will be added to the U-Boot 2701c609719bSwdenk version information (U_BOOT_VERSION) 2702c609719bSwdenk 2703c609719bSwdenk- Vendor Parameter Protection: 2704c609719bSwdenk 2705c609719bSwdenk U-Boot considers the values of the environment 2706c609719bSwdenk variables "serial#" (Board Serial Number) and 27077152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2708c609719bSwdenk are set once by the board vendor / manufacturer, and 2709c609719bSwdenk protects these variables from casual modification by 2710c609719bSwdenk the user. Once set, these variables are read-only, 2711c609719bSwdenk and write or delete attempts are rejected. You can 271211ccc33fSMarcel Ziswiler change this behaviour: 2713c609719bSwdenk 2714c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2715c609719bSwdenk file, the write protection for vendor parameters is 271647cd00faSwdenk completely disabled. Anybody can change or delete 2717c609719bSwdenk these parameters. 2718c609719bSwdenk 2719c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2720c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 272111ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2722c609719bSwdenk which can be changed exactly ONCE by the user. [The 2723c609719bSwdenk serial# is unaffected by this, i. e. it remains 2724c609719bSwdenk read-only.] 2725c609719bSwdenk 27262598090bSJoe Hershberger The same can be accomplished in a more flexible way 27272598090bSJoe Hershberger for any variable by configuring the type of access 27282598090bSJoe Hershberger to allow for those variables in the ".flags" variable 27292598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 27302598090bSJoe Hershberger 2731c609719bSwdenk- Protected RAM: 2732c609719bSwdenk CONFIG_PRAM 2733c609719bSwdenk 2734c609719bSwdenk Define this variable to enable the reservation of 2735c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2736c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2737c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2738c609719bSwdenk this default value by defining an environment 2739c609719bSwdenk variable "pram" to the number of kB you want to 2740c609719bSwdenk reserve. Note that the board info structure will 2741c609719bSwdenk still show the full amount of RAM. If pRAM is 2742c609719bSwdenk reserved, a new environment variable "mem" will 2743c609719bSwdenk automatically be defined to hold the amount of 2744c609719bSwdenk remaining RAM in a form that can be passed as boot 2745c609719bSwdenk argument to Linux, for instance like that: 2746c609719bSwdenk 2747fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2748c609719bSwdenk saveenv 2749c609719bSwdenk 2750c609719bSwdenk This way you can tell Linux not to use this memory, 2751c609719bSwdenk either, which results in a memory region that will 2752c609719bSwdenk not be affected by reboots. 2753c609719bSwdenk 2754c609719bSwdenk *WARNING* If your board configuration uses automatic 2755c609719bSwdenk detection of the RAM size, you must make sure that 2756c609719bSwdenk this memory test is non-destructive. So far, the 2757c609719bSwdenk following board configurations are known to be 2758c609719bSwdenk "pRAM-clean": 2759c609719bSwdenk 27601b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 27611b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2762544d97e9SWolfgang Denk FLAGADM, TQM8260 2763c609719bSwdenk 276440fef049SGabe Black- Access to physical memory region (> 4GB) 276540fef049SGabe Black Some basic support is provided for operations on memory not 276640fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 276740fef049SGabe Black support access to more than 4GB of memory on 32-bit 276840fef049SGabe Black machines using physical address extension or similar. 276940fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 277040fef049SGabe Black currently only supports clearing the memory. 277140fef049SGabe Black 2772c609719bSwdenk- Error Recovery: 2773c609719bSwdenk CONFIG_PANIC_HANG 2774c609719bSwdenk 2775c609719bSwdenk Define this variable to stop the system in case of a 2776c609719bSwdenk fatal error, so that you have to reset it manually. 2777c609719bSwdenk This is probably NOT a good idea for an embedded 277811ccc33fSMarcel Ziswiler system where you want the system to reboot 2779c609719bSwdenk automatically as fast as possible, but it may be 2780c609719bSwdenk useful during development since you can try to debug 2781c609719bSwdenk the conditions that lead to the situation. 2782c609719bSwdenk 2783c609719bSwdenk CONFIG_NET_RETRY_COUNT 2784c609719bSwdenk 2785c609719bSwdenk This variable defines the number of retries for 2786c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2787c609719bSwdenk before giving up the operation. If not defined, a 2788c609719bSwdenk default value of 5 is used. 2789c609719bSwdenk 279040cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 279140cb90eeSGuennadi Liakhovetski 279240cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 279340cb90eeSGuennadi Liakhovetski 279448a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 279548a3e999STetsuyuki Kobayashi 279648a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 279748a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 279848a3e999STetsuyuki Kobayashi try longer timeout such as 279948a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 280048a3e999STetsuyuki Kobayashi 2801c609719bSwdenk- Command Interpreter: 28028078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 280304a85b3bSwdenk 280404a85b3bSwdenk Enable auto completion of commands using TAB. 280504a85b3bSwdenk 28068078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 28078078f1a5SWolfgang Denk for the "hush" shell. 28088078f1a5SWolfgang Denk 28098078f1a5SWolfgang Denk 28106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2811c609719bSwdenk 2812c609719bSwdenk Define this variable to enable the "hush" shell (from 2813c609719bSwdenk Busybox) as command line interpreter, thus enabling 2814c609719bSwdenk powerful command line syntax like 2815c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2816c609719bSwdenk constructs ("shell scripts"). 2817c609719bSwdenk 2818c609719bSwdenk If undefined, you get the old, much simpler behaviour 2819c609719bSwdenk with a somewhat smaller memory footprint. 2820c609719bSwdenk 2821c609719bSwdenk 28226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2823c609719bSwdenk 2824c609719bSwdenk This defines the secondary prompt string, which is 2825c609719bSwdenk printed when the command interpreter needs more input 2826c609719bSwdenk to complete a command. Usually "> ". 2827c609719bSwdenk 2828c609719bSwdenk Note: 2829c609719bSwdenk 2830c609719bSwdenk In the current implementation, the local variables 2831c609719bSwdenk space and global environment variables space are 2832c609719bSwdenk separated. Local variables are those you define by 28333b57fe0aSwdenk simply typing `name=value'. To access a local 2834c609719bSwdenk variable later on, you have write `$name' or 28353b57fe0aSwdenk `${name}'; to execute the contents of a variable 28363b57fe0aSwdenk directly type `$name' at the command prompt. 2837c609719bSwdenk 2838c609719bSwdenk Global environment variables are those you use 2839c609719bSwdenk setenv/printenv to work with. To run a command stored 2840c609719bSwdenk in such a variable, you need to use the run command, 2841c609719bSwdenk and you must not use the '$' sign to access them. 2842c609719bSwdenk 2843c609719bSwdenk To store commands and special characters in a 2844c609719bSwdenk variable, please use double quotation marks 2845c609719bSwdenk surrounding the whole text of the variable, instead 2846c609719bSwdenk of the backslashes before semicolons and special 2847c609719bSwdenk symbols. 2848c609719bSwdenk 2849aa0c71acSWolfgang Denk- Commandline Editing and History: 2850aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2851aa0c71acSWolfgang Denk 285211ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2853aa0c71acSWolfgang Denk commandline input operations 2854aa0c71acSWolfgang Denk 2855a8c7c708Swdenk- Default Environment: 2856c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2857c609719bSwdenk 2858c609719bSwdenk Define this to contain any number of null terminated 2859c609719bSwdenk strings (variable = value pairs) that will be part of 28607152b1d0Swdenk the default environment compiled into the boot image. 28612262cfeeSwdenk 2862c609719bSwdenk For example, place something like this in your 2863c609719bSwdenk board's config file: 2864c609719bSwdenk 2865c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2866c609719bSwdenk "myvar1=value1\0" \ 2867c609719bSwdenk "myvar2=value2\0" 2868c609719bSwdenk 2869c609719bSwdenk Warning: This method is based on knowledge about the 2870c609719bSwdenk internal format how the environment is stored by the 28712262cfeeSwdenk U-Boot code. This is NOT an official, exported 2872c609719bSwdenk interface! Although it is unlikely that this format 28737152b1d0Swdenk will change soon, there is no guarantee either. 2874c609719bSwdenk You better know what you are doing here. 2875c609719bSwdenk 2876c609719bSwdenk Note: overly (ab)use of the default environment is 2877c609719bSwdenk discouraged. Make sure to check other ways to preset 287874de7aefSWolfgang Denk the environment like the "source" command or the 2879c609719bSwdenk boot command first. 2880c609719bSwdenk 28815e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 28825e724ca2SStephen Warren 28835e724ca2SStephen Warren Define this in order to add variables describing the 28845e724ca2SStephen Warren U-Boot build configuration to the default environment. 28855e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 28865e724ca2SStephen Warren 28875e724ca2SStephen Warren Enabling this option will cause the following to be defined: 28885e724ca2SStephen Warren 28895e724ca2SStephen Warren - CONFIG_SYS_ARCH 28905e724ca2SStephen Warren - CONFIG_SYS_CPU 28915e724ca2SStephen Warren - CONFIG_SYS_BOARD 28925e724ca2SStephen Warren - CONFIG_SYS_VENDOR 28935e724ca2SStephen Warren - CONFIG_SYS_SOC 28945e724ca2SStephen Warren 28957e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 28967e27f89fSTom Rini 28977e27f89fSTom Rini Define this in order to add variables describing certain 28987e27f89fSTom Rini run-time determined information about the hardware to the 28997e27f89fSTom Rini environment. These will be named board_name, board_rev. 29007e27f89fSTom Rini 290106fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 290206fd8538SSimon Glass 290306fd8538SSimon Glass Normally the environment is loaded when the board is 290406fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 290506fd8538SSimon Glass that so that the environment is not available until 290606fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 290706fd8538SSimon Glass this is instead controlled by the value of 290806fd8538SSimon Glass /config/load-environment. 290906fd8538SSimon Glass 2910a8c7c708Swdenk- DataFlash Support: 29112abbe075Swdenk CONFIG_HAS_DATAFLASH 29122abbe075Swdenk 29132abbe075Swdenk Defining this option enables DataFlash features and 29142abbe075Swdenk allows to read/write in Dataflash via the standard 29152abbe075Swdenk commands cp, md... 29162abbe075Swdenk 2917f61ec45eSEric Nelson- Serial Flash support 2918f61ec45eSEric Nelson CONFIG_CMD_SF 2919f61ec45eSEric Nelson 2920f61ec45eSEric Nelson Defining this option enables SPI flash commands 2921f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2922f61ec45eSEric Nelson 2923f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2924f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2925f61ec45eSEric Nelson commands. 2926f61ec45eSEric Nelson 2927f61ec45eSEric Nelson The following defaults may be provided by the platform 2928f61ec45eSEric Nelson to handle the common case when only a single serial 2929f61ec45eSEric Nelson flash is present on the system. 2930f61ec45eSEric Nelson 2931f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2932f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2933f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2934f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2935f61ec45eSEric Nelson 293624007273SSimon Glass CONFIG_CMD_SF_TEST 293724007273SSimon Glass 293824007273SSimon Glass Define this option to include a destructive SPI flash 293924007273SSimon Glass test ('sf test'). 294024007273SSimon Glass 29411dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 29421dcd6d03SJagannadha Sutradharudu Teki 29431dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 29441dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 29451dcd6d03SJagannadha Sutradharudu Teki 2946b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2947b902e07cSJagannadha Sutradharudu Teki 2948b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2949b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2950b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2951b902e07cSJagannadha Sutradharudu Teki 29523f85ce27Swdenk- SystemACE Support: 29533f85ce27Swdenk CONFIG_SYSTEMACE 29543f85ce27Swdenk 29553f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 29563f85ce27Swdenk chips attached via some sort of local bus. The address 295711ccc33fSMarcel Ziswiler of the chip must also be defined in the 29586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 29593f85ce27Swdenk 29603f85ce27Swdenk #define CONFIG_SYSTEMACE 29616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 29623f85ce27Swdenk 29633f85ce27Swdenk When SystemACE support is added, the "ace" device type 29643f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 29653f85ce27Swdenk 2966ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2967ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2968ecb0ccd9SWolfgang Denk 296928cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2970ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 297128cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2972ecb0ccd9SWolfgang Denk number generator is used. 2973ecb0ccd9SWolfgang Denk 297428cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 297528cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 297628cb9375SWolfgang Denk defined, the normal port 69 is used. 297728cb9375SWolfgang Denk 297828cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2979ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2980ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2981ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2982ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2983ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2984ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2985ecb0ccd9SWolfgang Denk 2986bf36c5d5SSimon Glass- Hashing support: 2987bf36c5d5SSimon Glass CONFIG_CMD_HASH 2988bf36c5d5SSimon Glass 2989bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2990bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2991bf36c5d5SSimon Glass 2992bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2993bf36c5d5SSimon Glass 2994bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2995bf36c5d5SSimon Glass size a little. 2996bf36c5d5SSimon Glass 2997bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2998bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2999bf36c5d5SSimon Glass 3000bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 3001bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 3002bf36c5d5SSimon Glass 3003a11f1873SRobert Winkler- Freescale i.MX specific commands: 3004a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 3005a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 3006a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 3007a11f1873SRobert Winkler 3008a11f1873SRobert Winkler CONFIG_CMD_BMODE 3009a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 3010a11f1873SRobert Winkler a boot from specific media. 3011a11f1873SRobert Winkler 3012a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 3013a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 3014a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 3015a11f1873SRobert Winkler will set it back to normal. This command currently 3016a11f1873SRobert Winkler supports i.MX53 and i.MX6. 3017a11f1873SRobert Winkler 301819c402afSSimon Glass- Signing support: 301919c402afSSimon Glass CONFIG_RSA 302019c402afSSimon Glass 302119c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 30228bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 302319c402afSSimon Glass 302419c402afSSimon Glass The signing part is build into mkimage regardless of this 302519c402afSSimon Glass option. 302619c402afSSimon Glass 30279e50c406SHeiko Schocher- bootcount support: 30289e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 30299e50c406SHeiko Schocher 30309e50c406SHeiko Schocher This enables the bootcounter support, see: 30319e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 30329e50c406SHeiko Schocher 30339e50c406SHeiko Schocher CONFIG_AT91SAM9XE 30349e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 30359e50c406SHeiko Schocher CONFIG_BLACKFIN 30369e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 30379e50c406SHeiko Schocher CONFIG_SOC_DA8XX 30389e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 30399e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 30409e50c406SHeiko Schocher enable support for the bootcounter in RAM 30419e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 30429e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 30439e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 30449e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 30459e50c406SHeiko Schocher the bootcounter. 30469e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 304719c402afSSimon Glass 3048a8c7c708Swdenk- Show boot progress: 3049c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 3050c609719bSwdenk 3051c609719bSwdenk Defining this option allows to add some board- 3052c609719bSwdenk specific code (calling a user-provided function 3053c609719bSwdenk "show_boot_progress(int)") that enables you to show 3054c609719bSwdenk the system's boot progress on some display (for 3055c609719bSwdenk example, some LED's) on your board. At the moment, 3056c609719bSwdenk the following checkpoints are implemented: 3057c609719bSwdenk 30583a608ca0SSimon Glass- Detailed boot stage timing 30593a608ca0SSimon Glass CONFIG_BOOTSTAGE 30603a608ca0SSimon Glass Define this option to get detailed timing of each stage 30613a608ca0SSimon Glass of the boot process. 30623a608ca0SSimon Glass 30633a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 30643a608ca0SSimon Glass This is the number of available user bootstage records. 30653a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 30663a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 30673a608ca0SSimon Glass the limit, recording will stop. 30683a608ca0SSimon Glass 30693a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 30703a608ca0SSimon Glass Define this to print a report before boot, similar to this: 30713a608ca0SSimon Glass 30723a608ca0SSimon Glass Timer summary in microseconds: 30733a608ca0SSimon Glass Mark Elapsed Stage 30743a608ca0SSimon Glass 0 0 reset 30753a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 30763a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 30773a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 30783a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 30793a608ca0SSimon Glass 3,910,375 250,777 main_loop 30803a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 30813a608ca0SSimon Glass 30,361,327 445,160 start_kernel 30823a608ca0SSimon Glass 30832eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 30842eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 30852eba38cfSSimon Glass and un/stashing of bootstage data. 30862eba38cfSSimon Glass 308794fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 308894fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 308994fd1316SSimon Glass node is created with each bootstage id as a child. Each child 309094fd1316SSimon Glass has a 'name' property and either 'mark' containing the 309194fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 309294fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 309394fd1316SSimon Glass For example: 309494fd1316SSimon Glass 309594fd1316SSimon Glass bootstage { 309694fd1316SSimon Glass 154 { 309794fd1316SSimon Glass name = "board_init_f"; 309894fd1316SSimon Glass mark = <3575678>; 309994fd1316SSimon Glass }; 310094fd1316SSimon Glass 170 { 310194fd1316SSimon Glass name = "lcd"; 310294fd1316SSimon Glass accum = <33482>; 310394fd1316SSimon Glass }; 310494fd1316SSimon Glass }; 310594fd1316SSimon Glass 310694fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 310794fd1316SSimon Glass 31081372cce2SMarian BalakowiczLegacy uImage format: 31091372cce2SMarian Balakowicz 3110c609719bSwdenk Arg Where When 3111c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3112c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3113c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3114c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3115c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3116c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3117c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3118c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3119c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 31201372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3121c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3122c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3123c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3124c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 31251372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3126c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 31271372cce2SMarian Balakowicz 31281372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 31291372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 31301372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 31311372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 31321372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 31331372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 31341372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 313511ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 31361372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 31371372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 31381372cce2SMarian Balakowicz 3139ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3140c609719bSwdenk 3141a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 314263e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 314363e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 314463e73c9aSwdenk 3145566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3146566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3147566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3148566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3149566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3150566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3151566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3152566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3153566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3154566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3155566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3156566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3157566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3158566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3159566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3160566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3161566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3162566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3163566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3164566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3165566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3166566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3167566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3168566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3169566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3170566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3171566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3172566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3173566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3174566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3175566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3176566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3177566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3178566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3179566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3180566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3181566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3182566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3183566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3184566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3185566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3186566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3187566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3188566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3189566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3190566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3191566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3192c609719bSwdenk 3193566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3194c609719bSwdenk 3195566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3196566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3197566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3198206c60cbSwdenk 3199566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3200566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 320111ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3202566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3203566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3204566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 320574de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 320674de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3207566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3208c609719bSwdenk 32091372cce2SMarian BalakowiczFIT uImage format: 32101372cce2SMarian Balakowicz 32111372cce2SMarian Balakowicz Arg Where When 32121372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 32131372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 32141372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 32151372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 32161372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 32171372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3218f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 32191372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 32201372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 32211372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 32221372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 32231372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 322411ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 322511ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 32261372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 32271372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 32281372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 32291372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 32301372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 32311372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 32321372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 32331372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 32341372cce2SMarian Balakowicz 32351372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 32361372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 32371372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 323811ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 32391372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 32401372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 32411372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 32421372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 32431372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 32441372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 32451372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 32461372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 32471372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 32481372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 32491372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 32501372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 32511372cce2SMarian Balakowicz 325211ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 32531372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 32541372cce2SMarian Balakowicz 325511ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 32561372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 32571372cce2SMarian Balakowicz 325811ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 32591372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 32601372cce2SMarian Balakowicz 326121d29f7fSHeiko Schocher- legacy image format: 326221d29f7fSHeiko Schocher CONFIG_IMAGE_FORMAT_LEGACY 326321d29f7fSHeiko Schocher enables the legacy image format support in U-Boot. 326421d29f7fSHeiko Schocher 326521d29f7fSHeiko Schocher Default: 326621d29f7fSHeiko Schocher enabled if CONFIG_FIT_SIGNATURE is not defined. 326721d29f7fSHeiko Schocher 326821d29f7fSHeiko Schocher CONFIG_DISABLE_IMAGE_LEGACY 326921d29f7fSHeiko Schocher disable the legacy image format 327021d29f7fSHeiko Schocher 327121d29f7fSHeiko Schocher This define is introduced, as the legacy image format is 327221d29f7fSHeiko Schocher enabled per default for backward compatibility. 327321d29f7fSHeiko Schocher 3274d95f6ec7SGabe Black- FIT image support: 3275d95f6ec7SGabe Black CONFIG_FIT 3276d95f6ec7SGabe Black Enable support for the FIT uImage format. 3277d95f6ec7SGabe Black 3278d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3279d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3280d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3281d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3282d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3283d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3284d95f6ec7SGabe Black 32853e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 32863e569a6bSSimon Glass This option enables signature verification of FIT uImages, 32873e569a6bSSimon Glass using a hash signed and verified using RSA. See 32883e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 32893e569a6bSSimon Glass 329021d29f7fSHeiko Schocher WARNING: When relying on signed FIT images with required 329121d29f7fSHeiko Schocher signature check the legacy image format is default 329221d29f7fSHeiko Schocher disabled. If a board need legacy image format support 329321d29f7fSHeiko Schocher enable this through CONFIG_IMAGE_FORMAT_LEGACY 329421d29f7fSHeiko Schocher 32959a4f479bSDirk Eibach CONFIG_FIT_DISABLE_SHA256 32969a4f479bSDirk Eibach Supporting SHA256 hashes has quite an impact on binary size. 32979a4f479bSDirk Eibach For constrained systems sha256 hash support can be disabled 32989a4f479bSDirk Eibach with this option. 32999a4f479bSDirk Eibach 33004cf2609bSWolfgang Denk- Standalone program support: 33014cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 33024cf2609bSWolfgang Denk 33036feff899SWolfgang Denk This option defines a board specific value for the 33046feff899SWolfgang Denk address where standalone program gets loaded, thus 33056feff899SWolfgang Denk overwriting the architecture dependent default 33064cf2609bSWolfgang Denk settings. 33074cf2609bSWolfgang Denk 33084cf2609bSWolfgang Denk- Frame Buffer Address: 33094cf2609bSWolfgang Denk CONFIG_FB_ADDR 33104cf2609bSWolfgang Denk 33114cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 331244a53b57SWolfgang Denk address for frame buffer. This is typically the case 331344a53b57SWolfgang Denk when using a graphics controller has separate video 331444a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 331544a53b57SWolfgang Denk the given address instead of dynamically reserving it 331644a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 331744a53b57SWolfgang Denk the memory for the frame buffer depending on the 331844a53b57SWolfgang Denk configured panel size. 33194cf2609bSWolfgang Denk 33204cf2609bSWolfgang Denk Please see board_init_f function. 33214cf2609bSWolfgang Denk 3322cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3323cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3324cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3325cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3326cccfc2abSDetlev Zundel 3327cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3328cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3329cccfc2abSDetlev Zundel 3330cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3331cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3332cccfc2abSDetlev Zundel 3333cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3334cccfc2abSDetlev Zundel Needed for mtdparts command support. 3335cccfc2abSDetlev Zundel 3336cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3337cccfc2abSDetlev Zundel 3338cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3339cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3340cccfc2abSDetlev Zundel 3341*ff94bc40SHeiko Schocher CONFIG_MTD_NAND_VERIFY_WRITE 3342*ff94bc40SHeiko Schocher verify if the written data is correct reread. 3343*ff94bc40SHeiko Schocher 334470c219cdSJoe Hershberger- UBI support 334570c219cdSJoe Hershberger CONFIG_CMD_UBI 334670c219cdSJoe Hershberger 334770c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 334870c219cdSJoe Hershberger with the UBI flash translation layer 334970c219cdSJoe Hershberger 335070c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 335170c219cdSJoe Hershberger 3352147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3353147162daSJoe Hershberger 3354147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3355147162daSJoe Hershberger warnings and errors enabled. 3356147162daSJoe Hershberger 3357*ff94bc40SHeiko Schocher 3358*ff94bc40SHeiko Schocher CONFIG_MTD_UBI_WL_THRESHOLD 3359*ff94bc40SHeiko Schocher This parameter defines the maximum difference between the highest 3360*ff94bc40SHeiko Schocher erase counter value and the lowest erase counter value of eraseblocks 3361*ff94bc40SHeiko Schocher of UBI devices. When this threshold is exceeded, UBI starts performing 3362*ff94bc40SHeiko Schocher wear leveling by means of moving data from eraseblock with low erase 3363*ff94bc40SHeiko Schocher counter to eraseblocks with high erase counter. 3364*ff94bc40SHeiko Schocher 3365*ff94bc40SHeiko Schocher The default value should be OK for SLC NAND flashes, NOR flashes and 3366*ff94bc40SHeiko Schocher other flashes which have eraseblock life-cycle 100000 or more. 3367*ff94bc40SHeiko Schocher However, in case of MLC NAND flashes which typically have eraseblock 3368*ff94bc40SHeiko Schocher life-cycle less than 10000, the threshold should be lessened (e.g., 3369*ff94bc40SHeiko Schocher to 128 or 256, although it does not have to be power of 2). 3370*ff94bc40SHeiko Schocher 3371*ff94bc40SHeiko Schocher default: 4096 3372*ff94bc40SHeiko Schocher 3373*ff94bc40SHeiko Schocher CONFIG_MTD_UBI_BEB_LIMIT 3374*ff94bc40SHeiko Schocher This option specifies the maximum bad physical eraseblocks UBI 3375*ff94bc40SHeiko Schocher expects on the MTD device (per 1024 eraseblocks). If the 3376*ff94bc40SHeiko Schocher underlying flash does not admit of bad eraseblocks (e.g. NOR 3377*ff94bc40SHeiko Schocher flash), this value is ignored. 3378*ff94bc40SHeiko Schocher 3379*ff94bc40SHeiko Schocher NAND datasheets often specify the minimum and maximum NVM 3380*ff94bc40SHeiko Schocher (Number of Valid Blocks) for the flashes' endurance lifetime. 3381*ff94bc40SHeiko Schocher The maximum expected bad eraseblocks per 1024 eraseblocks 3382*ff94bc40SHeiko Schocher then can be calculated as "1024 * (1 - MinNVB / MaxNVB)", 3383*ff94bc40SHeiko Schocher which gives 20 for most NANDs (MaxNVB is basically the total 3384*ff94bc40SHeiko Schocher count of eraseblocks on the chip). 3385*ff94bc40SHeiko Schocher 3386*ff94bc40SHeiko Schocher To put it differently, if this value is 20, UBI will try to 3387*ff94bc40SHeiko Schocher reserve about 1.9% of physical eraseblocks for bad blocks 3388*ff94bc40SHeiko Schocher handling. And that will be 1.9% of eraseblocks on the entire 3389*ff94bc40SHeiko Schocher NAND chip, not just the MTD partition UBI attaches. This means 3390*ff94bc40SHeiko Schocher that if you have, say, a NAND flash chip admits maximum 40 bad 3391*ff94bc40SHeiko Schocher eraseblocks, and it is split on two MTD partitions of the same 3392*ff94bc40SHeiko Schocher size, UBI will reserve 40 eraseblocks when attaching a 3393*ff94bc40SHeiko Schocher partition. 3394*ff94bc40SHeiko Schocher 3395*ff94bc40SHeiko Schocher default: 20 3396*ff94bc40SHeiko Schocher 3397*ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP 3398*ff94bc40SHeiko Schocher Fastmap is a mechanism which allows attaching an UBI device 3399*ff94bc40SHeiko Schocher in nearly constant time. Instead of scanning the whole MTD device it 3400*ff94bc40SHeiko Schocher only has to locate a checkpoint (called fastmap) on the device. 3401*ff94bc40SHeiko Schocher The on-flash fastmap contains all information needed to attach 3402*ff94bc40SHeiko Schocher the device. Using fastmap makes only sense on large devices where 3403*ff94bc40SHeiko Schocher attaching by scanning takes long. UBI will not automatically install 3404*ff94bc40SHeiko Schocher a fastmap on old images, but you can set the UBI parameter 3405*ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT to 1 if you want so. Please note 3406*ff94bc40SHeiko Schocher that fastmap-enabled images are still usable with UBI implementations 3407*ff94bc40SHeiko Schocher without fastmap support. On typical flash devices the whole fastmap 3408*ff94bc40SHeiko Schocher fits into one PEB. UBI will reserve PEBs to hold two fastmaps. 3409*ff94bc40SHeiko Schocher 3410*ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 3411*ff94bc40SHeiko Schocher Set this parameter to enable fastmap automatically on images 3412*ff94bc40SHeiko Schocher without a fastmap. 3413*ff94bc40SHeiko Schocher default: 0 3414*ff94bc40SHeiko Schocher 341570c219cdSJoe Hershberger- UBIFS support 341670c219cdSJoe Hershberger CONFIG_CMD_UBIFS 341770c219cdSJoe Hershberger 341870c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 341970c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 342070c219cdSJoe Hershberger 342170c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 342270c219cdSJoe Hershberger 3423147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3424147162daSJoe Hershberger 3425147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3426147162daSJoe Hershberger warnings and errors enabled. 3427147162daSJoe Hershberger 34286a11cf48SDaniel Schwierzeck- SPL framework 34296a11cf48SDaniel Schwierzeck CONFIG_SPL 34306a11cf48SDaniel Schwierzeck Enable building of SPL globally. 34316a11cf48SDaniel Schwierzeck 343295579793STom Rini CONFIG_SPL_LDSCRIPT 343395579793STom Rini LDSCRIPT for linking the SPL binary. 343495579793STom Rini 34356ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 34366ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 34376ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 34386ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 34398960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 34406ebc3461SAlbert ARIBAUD must not be both defined at the same time. 34416ebc3461SAlbert ARIBAUD 344295579793STom Rini CONFIG_SPL_MAX_SIZE 34436ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 34446ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 34456ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 34466ebc3461SAlbert ARIBAUD not exceed it. 344795579793STom Rini 34486a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 34496a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 34506a11cf48SDaniel Schwierzeck 345194a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 345294a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 345394a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 345494a45bb1SScott Wood 345595579793STom Rini CONFIG_SPL_BSS_START_ADDR 345695579793STom Rini Link address for the BSS within the SPL binary. 345795579793STom Rini 345895579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 34596ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 34606ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 34616ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 34628960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 34636ebc3461SAlbert ARIBAUD must not be both defined at the same time. 346495579793STom Rini 346595579793STom Rini CONFIG_SPL_STACK 346695579793STom Rini Adress of the start of the stack SPL will use 346795579793STom Rini 346894a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 346994a45bb1SScott Wood Adress of the start of the stack SPL will use after 347094a45bb1SScott Wood relocation. If unspecified, this is equal to 347194a45bb1SScott Wood CONFIG_SPL_STACK. 347294a45bb1SScott Wood 347395579793STom Rini CONFIG_SYS_SPL_MALLOC_START 347495579793STom Rini Starting address of the malloc pool used in SPL. 347595579793STom Rini 347695579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 347795579793STom Rini The size of the malloc pool used in SPL. 34786a11cf48SDaniel Schwierzeck 347947f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 348047f7bcaeSTom Rini Enable the SPL framework under common/. This framework 348147f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 348247f7bcaeSTom Rini NAND loading of the Linux Kernel. 348347f7bcaeSTom Rini 34849607faf2STom Rini CONFIG_SPL_OS_BOOT 34859607faf2STom Rini Enable booting directly to an OS from SPL. 34869607faf2STom Rini See also: doc/README.falcon 34879607faf2STom Rini 3488861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3489861a86f4STom Rini For ARM, enable an optional function to print more information 3490861a86f4STom Rini about the running system. 3491861a86f4STom Rini 34924b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 34934b919725SScott Wood Arch init code should be built for a very small image 34944b919725SScott Wood 34956a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 34966a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 34976a11cf48SDaniel Schwierzeck 34986a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 34996a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 35006a11cf48SDaniel Schwierzeck 35016a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 35026a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 35036a11cf48SDaniel Schwierzeck 35046a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 35056a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 35066a11cf48SDaniel Schwierzeck 35076a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 35086a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 35096a11cf48SDaniel Schwierzeck 351095579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 351195579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 351295579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 351395579793STom Rini Address, size and partition on the MMC to load U-Boot from 351495579793STom Rini when the MMC is being used in raw mode. 351595579793STom Rini 35162b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 35172b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 35182b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 35192b75b0adSPeter Korsgaard 35202b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 35212b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 35222b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 35232b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 35242b75b0adSPeter Korsgaard (for falcon mode) 35252b75b0adSPeter Korsgaard 352695579793STom Rini CONFIG_SPL_FAT_SUPPORT 352795579793STom Rini Support for fs/fat/libfat.o in SPL binary 352895579793STom Rini 352995579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 353095579793STom Rini Filename to read to load U-Boot when reading from FAT 353195579793STom Rini 35327ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 35337ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 35347ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 35357ad2cc79SPeter Korsgaard 35367ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 35377ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 35387ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 35397ad2cc79SPeter Korsgaard 354006f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 354106f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 354206f60ae3SScott Wood start.S waits for the rest of the SPL to load before 354306f60ae3SScott Wood continuing (the hardware starts execution after just 354406f60ae3SScott Wood loading the first page rather than the full 4K). 354506f60ae3SScott Wood 3546651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3547651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3548651fcf60SPrabhakar Kushwaha 35496f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 35506f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 35516f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 35526f2f01b9SScott Wood 35536f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 35546f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 35556f2f01b9SScott Wood 35566f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 35576f2f01b9SScott Wood Include standard software ECC in the SPL 35586f2f01b9SScott Wood 355995579793STom Rini CONFIG_SPL_NAND_SIMPLE 35607d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 35617d4b7955SScott Wood expose the cmd_ctrl() interface. 356295579793STom Rini 35636dd3b566STom Rini CONFIG_SPL_MTD_SUPPORT 35646dd3b566STom Rini Support for the MTD subsystem within SPL. Useful for 35656dd3b566STom Rini environment on NAND support within SPL. 35666dd3b566STom Rini 3567bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3568bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 35695614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3570bb0dc108SYing Zhang 35717c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 35727c8eea59SYing Zhang Set for common ddr init with serial presence detect in 35737c8eea59SYing Zhang SPL binary. 35747c8eea59SYing Zhang 357595579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 357695579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 357795579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 357895579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 357995579793STom Rini CONFIG_SYS_NAND_ECCBYTES 358095579793STom Rini Defines the size and behavior of the NAND that SPL uses 35817d4b7955SScott Wood to read U-Boot 358295579793STom Rini 3583fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3584fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3585fbe76ae4SPrabhakar Kushwaha 358695579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 35877d4b7955SScott Wood Location in NAND to read U-Boot from 35887d4b7955SScott Wood 35897d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 35907d4b7955SScott Wood Location in memory to load U-Boot to 35917d4b7955SScott Wood 35927d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 35937d4b7955SScott Wood Size of image to load 359495579793STom Rini 359595579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 35967d4b7955SScott Wood Entry point in loaded image to jump to 359795579793STom Rini 359895579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 359995579793STom Rini Define this if you need to first read the OOB and then the 360095579793STom Rini data. This is used for example on davinci plattforms. 360195579793STom Rini 360295579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 360395579793STom Rini Support for an OMAP3-specific set of functions to return the 360495579793STom Rini ID and MFR of the first attached NAND chip, if present. 360595579793STom Rini 36066a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 36076a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 36086a11cf48SDaniel Schwierzeck 36096a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 36106a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 36116a11cf48SDaniel Schwierzeck 36126a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 36136a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 36146a11cf48SDaniel Schwierzeck 3615c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3616c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3617c57b953dSPavel Machek 36186a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 36196a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 36201372cce2SMarian Balakowicz 3621ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3622ba1bee43SYing Zhang Support for the environment operating in SPL binary 3623ba1bee43SYing Zhang 3624ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3625ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3626ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3627ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3628ba1bee43SYing Zhang 362974752baaSScott Wood CONFIG_SPL_PAD_TO 36306113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 36316113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 36326113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36336113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36346113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 363574752baaSScott Wood 3636ca2fca22SScott Wood CONFIG_SPL_TARGET 3637ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3638ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3639ca2fca22SScott Wood example if more than one image needs to be produced. 3640ca2fca22SScott Wood 364187ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 364287ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 364387ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 364487ebee39SSimon Glass option to re-enable it. This will affect the output of the 364587ebee39SSimon Glass bootm command when booting a FIT image. 364687ebee39SSimon Glass 36473aa29de0SYing Zhang- TPL framework 36483aa29de0SYing Zhang CONFIG_TPL 36493aa29de0SYing Zhang Enable building of TPL globally. 36503aa29de0SYing Zhang 36513aa29de0SYing Zhang CONFIG_TPL_PAD_TO 36523aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 36533aa29de0SYing Zhang the TPL payload. By default, this is defined as 36543aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 36553aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 36563aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 36573aa29de0SYing Zhang 3658c609719bSwdenkModem Support: 3659c609719bSwdenk-------------- 3660c609719bSwdenk 3661566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3662c609719bSwdenk 366311ccc33fSMarcel Ziswiler- Modem support enable: 3664c609719bSwdenk CONFIG_MODEM_SUPPORT 3665c609719bSwdenk 3666c609719bSwdenk- RTS/CTS Flow control enable: 3667c609719bSwdenk CONFIG_HWFLOW 3668c609719bSwdenk 3669c609719bSwdenk- Modem debug support: 3670c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3671c609719bSwdenk 3672c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3673c609719bSwdenk for modem support. Useful only with BDI2000. 3674c609719bSwdenk 3675a8c7c708Swdenk- Interrupt support (PPC): 3676a8c7c708Swdenk 3677a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3678a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 367911ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3680a8c7c708Swdenk should set decrementer_count to appropriate value. If 368111ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3682a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 368311ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3684a8c7c708Swdenk specific handling. If board has watchdog / status_led 3685a8c7c708Swdenk / other_activity_monitor it works automatically from 3686a8c7c708Swdenk general timer_interrupt(). 3687a8c7c708Swdenk 3688c609719bSwdenk- General: 3689c609719bSwdenk 3690c609719bSwdenk In the target system modem support is enabled when a 3691c609719bSwdenk specific key (key combination) is pressed during 3692c609719bSwdenk power-on. Otherwise U-Boot will boot normally 369311ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3694c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3695c609719bSwdenk function, returning 1 and thus enabling modem 3696c609719bSwdenk initialization. 3697c609719bSwdenk 3698c609719bSwdenk If there are no modem init strings in the 3699c609719bSwdenk environment, U-Boot proceed to autoboot; the 3700c609719bSwdenk previous output (banner, info printfs) will be 370111ccc33fSMarcel Ziswiler suppressed, though. 3702c609719bSwdenk 3703c609719bSwdenk See also: doc/README.Modem 3704c609719bSwdenk 37059660e442SHelmut RaigerBoard initialization settings: 37069660e442SHelmut Raiger------------------------------ 37079660e442SHelmut Raiger 37089660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 37099660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 37109660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 37119660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 37129660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 37139660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 37149660e442SHelmut Raiger 37159660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 37169660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 37179660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 37189660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3719c609719bSwdenk 3720c609719bSwdenkConfiguration Settings: 3721c609719bSwdenk----------------------- 3722c609719bSwdenk 37234d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 37244d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 37254d1fd7f1SYork Sun 37266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3727c609719bSwdenk undefine this when you're short of memory. 3728c609719bSwdenk 37292fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 37302fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 37312fb2604dSPeter Tyser 37326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3733c609719bSwdenk prompt for user input. 3734c609719bSwdenk 37356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3736c609719bSwdenk 37376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3738c609719bSwdenk 37396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3740c609719bSwdenk 37416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3742c609719bSwdenk the application (usually a Linux kernel) when it is 3743c609719bSwdenk booted 3744c609719bSwdenk 37456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3746c609719bSwdenk List of legal baudrate settings for this board. 3747c609719bSwdenk 37486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3749c609719bSwdenk Suppress display of console information at boot. 3750c609719bSwdenk 37516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3752c609719bSwdenk If the board specific function 3753c609719bSwdenk extern int overwrite_console (void); 3754c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3755c609719bSwdenk serial port, else the settings in the environment are used. 3756c609719bSwdenk 37576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3758c609719bSwdenk Enable the call to overwrite_console(). 3759c609719bSwdenk 37606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3761c609719bSwdenk Enable overwrite of previous console environment settings. 3762c609719bSwdenk 37636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3764c609719bSwdenk Begin and End addresses of the area used by the 3765c609719bSwdenk simple memory test. 3766c609719bSwdenk 37676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3768c609719bSwdenk Enable an alternate, more extensive memory test. 3769c609719bSwdenk 37706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 37715f535fe1Swdenk Scratch address used by the alternate memory test 37725f535fe1Swdenk You only need to set this if address zero isn't writeable 37735f535fe1Swdenk 37746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 37756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 377614f73ca6SStefan Roese this specified memory area will get subtracted from the top 377711ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 377814f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 377914f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 378014f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 37815e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 378214f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 37835e12e75dSStefan Roese will have to get fixed in Linux additionally. 378414f73ca6SStefan Roese 378514f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 378614f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 378714f73ca6SStefan Roese be touched. 378814f73ca6SStefan Roese 378914f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 379014f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 379114f73ca6SStefan Roese then the end address of the Linux memory will be located at a 379214f73ca6SStefan Roese non page size aligned address and this could cause major 379314f73ca6SStefan Roese problems. 379414f73ca6SStefan Roese 37956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3796c609719bSwdenk Enable temporary baudrate change while serial download 3797c609719bSwdenk 37986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3799c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3800c609719bSwdenk 38016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3802c609719bSwdenk Physical start address of Motherboard I/O (if using a 3803c609719bSwdenk Cogent motherboard) 3804c609719bSwdenk 38056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3806c609719bSwdenk Physical start address of Flash memory. 3807c609719bSwdenk 38086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3809c609719bSwdenk Physical start address of boot monitor code (set by 3810c609719bSwdenk make config files to be same as the text base address 381114d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 38126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3813c609719bSwdenk 38146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 38153b57fe0aSwdenk Size of memory reserved for monitor code, used to 38163b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 38173b57fe0aSwdenk embedded within the U-Boot image, or in a separate 38183b57fe0aSwdenk flash sector. 3819c609719bSwdenk 38206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3821c609719bSwdenk Size of DRAM reserved for malloc() use. 3822c609719bSwdenk 3823d59476b6SSimon Glass- CONFIG_SYS_MALLOC_F_LEN 3824d59476b6SSimon Glass Size of the malloc() pool for use before relocation. If 3825d59476b6SSimon Glass this is defined, then a very simple malloc() implementation 3826d59476b6SSimon Glass will become available before relocation. The address is just 3827d59476b6SSimon Glass below the global data, and the stack is moved down to make 3828d59476b6SSimon Glass space. 3829d59476b6SSimon Glass 3830d59476b6SSimon Glass This feature allocates regions with increasing addresses 3831d59476b6SSimon Glass within the region. calloc() is supported, but realloc() 3832d59476b6SSimon Glass is not available. free() is supported but does nothing. 3833d59476b6SSimon Glass The memory will be freed (or in fact just forgotton) when 3834d59476b6SSimon Glass U-Boot relocates itself. 3835d59476b6SSimon Glass 383629afe9e6SSimon Glass Pre-relocation malloc() is only supported on sandbox 383729afe9e6SSimon Glass at present but is fairly easy to enable for other archs. 383829afe9e6SSimon Glass 383976a1e584SSimon Glass Pre-relocation malloc() is only supported on ARM at present 384076a1e584SSimon Glass but is fairly easy to enable for other archs. 384176a1e584SSimon Glass 38426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 384315940c9aSStefan Roese Normally compressed uImages are limited to an 384415940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 38456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 384615940c9aSStefan Roese to adjust this setting to your needs. 3847c609719bSwdenk 38486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3849c609719bSwdenk Maximum size of memory mapped by the startup code of 3850c609719bSwdenk the Linux kernel; all data that must be processed by 38517d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 38527d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 38531bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 38547d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3855c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3856c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3857c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3858c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3859c609719bSwdenk 3860fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3861fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3862fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3863fca43cc8SJohn Rigby is enabled. 3864fca43cc8SJohn Rigby 3865fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3866fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3867fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3868fca43cc8SJohn Rigby 3869fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3870fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3871fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3872fca43cc8SJohn Rigby 38736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3874c609719bSwdenk Max number of Flash memory banks 3875c609719bSwdenk 38766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3877c609719bSwdenk Max number of sectors on a Flash chip 3878c609719bSwdenk 38796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3880c609719bSwdenk Timeout for Flash erase operations (in ms) 3881c609719bSwdenk 38826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3883c609719bSwdenk Timeout for Flash write operations (in ms) 3884c609719bSwdenk 38856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 38868564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 38878564acf9Swdenk 38886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 38898564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 38908564acf9Swdenk 38916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 38928564acf9Swdenk If defined, hardware flash sectors protection is used 38938564acf9Swdenk instead of U-Boot software protection. 38948564acf9Swdenk 38956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3896c609719bSwdenk 3897c609719bSwdenk Enable TFTP transfers directly to flash memory; 3898c609719bSwdenk without this option such a download has to be 3899c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3900c609719bSwdenk copy from RAM to flash. 3901c609719bSwdenk 3902c609719bSwdenk The two-step approach is usually more reliable, since 3903c609719bSwdenk you can check if the download worked before you erase 390411ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 390511ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3906c609719bSwdenk downloaded image) this option may be very useful. 3907c609719bSwdenk 39086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3909c609719bSwdenk Define if the flash driver uses extra elements in the 39105653fc33Swdenk common flash structure for storing flash geometry. 39115653fc33Swdenk 391200b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 39135653fc33Swdenk This option also enables the building of the cfi_flash driver 39145653fc33Swdenk in the drivers directory 391553cf9435Sstroese 391691809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 391791809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 391891809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 391991809ed5SPiotr Ziecik to the MTD layer. 392091809ed5SPiotr Ziecik 39216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 392296ef831fSGuennadi Liakhovetski Use buffered writes to flash. 392396ef831fSGuennadi Liakhovetski 392496ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 392596ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 392696ef831fSGuennadi Liakhovetski write commands. 392796ef831fSGuennadi Liakhovetski 39286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 39295568e613SStefan Roese If this option is defined, the common CFI flash doesn't 39305568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 39315568e613SStefan Roese is useful, if some of the configured banks are only 39325568e613SStefan Roese optionally available. 39335568e613SStefan Roese 39349a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 39359a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 39369a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 39379a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 39389a042e9cSJerry Van Baren 3939352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3940352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3941352ef3f1SStefan Roese against the source after the write operation. An error message 3942352ef3f1SStefan Roese will be printed when the contents are not identical. 3943352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3944352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3945352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3946352ef3f1SStefan Roese this option if you really know what you are doing. 3947352ef3f1SStefan Roese 39486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 394911ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 395011ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 395153cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 395253cf9435Sstroese buffers can be full shortly after enabling the interface 395311ccc33fSMarcel Ziswiler on high Ethernet traffic. 395453cf9435Sstroese Defaults to 4 if not defined. 3955c609719bSwdenk 3956ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3957ea882bafSWolfgang Denk 3958ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3959ea882bafSWolfgang Denk internally to store the environment settings. The default 3960ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3961ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3962ea882bafSWolfgang Denk lib/hashtable.c for details. 3963ea882bafSWolfgang Denk 39642598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 39652598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 39661bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 39672598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 39682598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 39692598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 39702598090bSJoe Hershberger 39712598090bSJoe Hershberger The format of the list is: 39722598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3973267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3974267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 39752598090bSJoe Hershberger entry = variable_name[:attributes] 39762598090bSJoe Hershberger list = entry[,list] 39772598090bSJoe Hershberger 39782598090bSJoe Hershberger The type attributes are: 39792598090bSJoe Hershberger s - String (default) 39802598090bSJoe Hershberger d - Decimal 39812598090bSJoe Hershberger x - Hexadecimal 39822598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 39832598090bSJoe Hershberger i - IP address 39842598090bSJoe Hershberger m - MAC address 39852598090bSJoe Hershberger 3986267541f7SJoe Hershberger The access attributes are: 3987267541f7SJoe Hershberger a - Any (default) 3988267541f7SJoe Hershberger r - Read-only 3989267541f7SJoe Hershberger o - Write-once 3990267541f7SJoe Hershberger c - Change-default 3991267541f7SJoe Hershberger 39922598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 39932598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 39942598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 39952598090bSJoe Hershberger 39962598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 39972598090bSJoe Hershberger Define this to a list (string) to define validation that 39982598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 39992598090bSJoe Hershberger environment variable. To override a setting in the static 40002598090bSJoe Hershberger list, simply add an entry for the same variable name to the 40012598090bSJoe Hershberger ".flags" variable. 40022598090bSJoe Hershberger 4003267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 4004267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 4005267541f7SJoe Hershberger access flags. 4006267541f7SJoe Hershberger 40075c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 40085c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 40095c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 40105c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 40115c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 40125c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 40135c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 40145c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 40155c1a7ea6SSimon Glass your board please report the problem and send patches! 40165c1a7ea6SSimon Glass 40170b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 40180b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 40190b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 40200b1b60c7SLokesh Vutla the value can be calulated on a given board. 4021632efa74SSimon Glass 4022c609719bSwdenkThe following definitions that deal with the placement and management 4023c609719bSwdenkof environment data (variable area); in general, we support the 4024c609719bSwdenkfollowing configurations: 4025c609719bSwdenk 4026c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 4027c3eb3fe4SMike Frysinger 4028c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 4029c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 4030c3eb3fe4SMike Frysinger 40315a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 4032c609719bSwdenk 4033c609719bSwdenk Define this if the environment is in flash memory. 4034c609719bSwdenk 4035c609719bSwdenk a) The environment occupies one whole flash sector, which is 4036c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 4037c609719bSwdenk happens usually with "bottom boot sector" or "top boot 4038c609719bSwdenk sector" type flash chips, which have several smaller 4039c609719bSwdenk sectors at the start or the end. For instance, such a 4040c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 4041c609719bSwdenk such a case you would place the environment in one of the 4042c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 4043c609719bSwdenk "top boot sector" type flash chips, you would put the 4044c609719bSwdenk environment in one of the last sectors, leaving a gap 4045c609719bSwdenk between U-Boot and the environment. 4046c609719bSwdenk 40470e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 4048c609719bSwdenk 4049c609719bSwdenk Offset of environment data (variable area) to the 4050c609719bSwdenk beginning of flash memory; for instance, with bottom boot 4051c609719bSwdenk type flash chips the second sector can be used: the offset 4052c609719bSwdenk for this sector is given here. 4053c609719bSwdenk 40546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 4055c609719bSwdenk 40560e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 4057c609719bSwdenk 4058c609719bSwdenk This is just another way to specify the start address of 4059c609719bSwdenk the flash sector containing the environment (instead of 40600e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 4061c609719bSwdenk 40620e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 4063c609719bSwdenk 4064c609719bSwdenk Size of the sector containing the environment. 4065c609719bSwdenk 4066c609719bSwdenk 4067c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 4068c609719bSwdenk In such a case you don't want to spend a whole sector for 4069c609719bSwdenk the environment. 4070c609719bSwdenk 40710e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4072c609719bSwdenk 40735a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 40740e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 4075c609719bSwdenk of this flash sector for the environment. This saves 4076c609719bSwdenk memory for the RAM copy of the environment. 4077c609719bSwdenk 4078c609719bSwdenk It may also save flash memory if you decide to use this 4079c609719bSwdenk when your environment is "embedded" within U-Boot code, 4080c609719bSwdenk since then the remainder of the flash sector could be used 4081c609719bSwdenk for U-Boot code. It should be pointed out that this is 4082c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 4083c609719bSwdenk updating the environment in flash makes it always 4084c609719bSwdenk necessary to erase the WHOLE sector. If something goes 4085c609719bSwdenk wrong before the contents has been restored from a copy in 4086c609719bSwdenk RAM, your target system will be dead. 4087c609719bSwdenk 40880e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 40890e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 4090c609719bSwdenk 4091c609719bSwdenk These settings describe a second storage area used to hold 409211ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 40933e38691eSwdenk a valid backup copy in case there is a power failure during 4094c609719bSwdenk a "saveenv" operation. 4095c609719bSwdenk 4096c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 4097c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 4098c609719bSwdenkaccordingly! 4099c609719bSwdenk 4100c609719bSwdenk 41019314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 4102c609719bSwdenk 4103c609719bSwdenk Define this if you have some non-volatile memory device 4104c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 4105c609719bSwdenk environment. 4106c609719bSwdenk 41070e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 41080e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4109c609719bSwdenk 411011ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 4111c609719bSwdenk want to use for environment. It is assumed that this memory 4112c609719bSwdenk can just be read and written to, without any special 4113c609719bSwdenk provision. 4114c609719bSwdenk 4115c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 4116c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 411711ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 4118c609719bSwdenkU-Boot will hang. 4119c609719bSwdenk 4120c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 4121c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 4122c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 4123c609719bSwdenkto save the current settings. 4124c609719bSwdenk 4125c609719bSwdenk 4126bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 4127c609719bSwdenk 4128c609719bSwdenk Use this if you have an EEPROM or similar serial access 4129c609719bSwdenk device and a driver for it. 4130c609719bSwdenk 41310e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 41320e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 4133c609719bSwdenk 4134c609719bSwdenk These two #defines specify the offset and size of the 4135c609719bSwdenk environment area within the total memory of your EEPROM. 4136c609719bSwdenk 41376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 4138c609719bSwdenk If defined, specified the chip address of the EEPROM device. 4139c609719bSwdenk The default address is zero. 4140c609719bSwdenk 41416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 4142c609719bSwdenk If defined, the number of bits used to address bytes in a 4143c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 4144c609719bSwdenk would require six bits. 4145c609719bSwdenk 41466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 4147c609719bSwdenk If defined, the number of milliseconds to delay between 4148c609719bSwdenk page writes. The default is zero milliseconds. 4149c609719bSwdenk 41506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 4151c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 4152c609719bSwdenk that this is NOT the chip address length! 4153c609719bSwdenk 41546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 41555cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 41565cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 41575cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 41585cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 41595cf91d6bSwdenk byte chips. 41605cf91d6bSwdenk 41615cf91d6bSwdenk Note that we consider the length of the address field to 41625cf91d6bSwdenk still be one byte because the extra address bits are hidden 41635cf91d6bSwdenk in the chip address. 41645cf91d6bSwdenk 41656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 4166c609719bSwdenk The size in bytes of the EEPROM device. 4167c609719bSwdenk 4168548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 4169548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 4170548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 4171548738b4SHeiko Schocher 4172548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 4173548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 4174548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 4175548738b4SHeiko Schocher EEPROM. For example: 4176548738b4SHeiko Schocher 4177ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 4178548738b4SHeiko Schocher 4179548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 4180548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 4181c609719bSwdenk 4182057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 41835779d8d9Swdenk 41845779d8d9Swdenk Define this if you have a DataFlash memory device which you 41855779d8d9Swdenk want to use for the environment. 41865779d8d9Swdenk 41870e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 41880e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 41890e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 41905779d8d9Swdenk 41915779d8d9Swdenk These three #defines specify the offset and size of the 41925779d8d9Swdenk environment area within the total memory of your DataFlash placed 41935779d8d9Swdenk at the specified address. 41945779d8d9Swdenk 4195bd83b592SWu, Josh- CONFIG_ENV_IS_IN_SPI_FLASH: 4196bd83b592SWu, Josh 4197bd83b592SWu, Josh Define this if you have a SPI Flash memory device which you 4198bd83b592SWu, Josh want to use for the environment. 4199bd83b592SWu, Josh 4200bd83b592SWu, Josh - CONFIG_ENV_OFFSET: 4201bd83b592SWu, Josh - CONFIG_ENV_SIZE: 4202bd83b592SWu, Josh 4203bd83b592SWu, Josh These two #defines specify the offset and size of the 4204bd83b592SWu, Josh environment area within the SPI Flash. CONFIG_ENV_OFFSET must be 4205bd83b592SWu, Josh aligned to an erase sector boundary. 4206bd83b592SWu, Josh 4207bd83b592SWu, Josh - CONFIG_ENV_SECT_SIZE: 4208bd83b592SWu, Josh 4209bd83b592SWu, Josh Define the SPI flash's sector size. 4210bd83b592SWu, Josh 4211bd83b592SWu, Josh - CONFIG_ENV_OFFSET_REDUND (optional): 4212bd83b592SWu, Josh 4213bd83b592SWu, Josh This setting describes a second storage area of CONFIG_ENV_SIZE 4214bd83b592SWu, Josh size used to hold a redundant copy of the environment data, so 4215bd83b592SWu, Josh that there is a valid backup copy in case there is a power failure 4216bd83b592SWu, Josh during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4217bd83b592SWu, Josh aligned to an erase sector boundary. 4218bd83b592SWu, Josh 4219bd83b592SWu, Josh - CONFIG_ENV_SPI_BUS (optional): 4220bd83b592SWu, Josh - CONFIG_ENV_SPI_CS (optional): 4221bd83b592SWu, Josh 4222bd83b592SWu, Josh Define the SPI bus and chip select. If not defined they will be 0. 4223bd83b592SWu, Josh 4224bd83b592SWu, Josh - CONFIG_ENV_SPI_MAX_HZ (optional): 4225bd83b592SWu, Josh 4226bd83b592SWu, Josh Define the SPI max work clock. If not defined then use 1MHz. 4227bd83b592SWu, Josh 4228bd83b592SWu, Josh - CONFIG_ENV_SPI_MODE (optional): 4229bd83b592SWu, Josh 4230bd83b592SWu, Josh Define the SPI work mode. If not defined then use SPI_MODE_3. 4231bd83b592SWu, Josh 42320a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 42330a85a9e7SLiu Gang 42340a85a9e7SLiu Gang Define this if you have a remote memory space which you 42350a85a9e7SLiu Gang want to use for the local device's environment. 42360a85a9e7SLiu Gang 42370a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 42380a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 42390a85a9e7SLiu Gang 42400a85a9e7SLiu Gang These two #defines specify the address and size of the 42410a85a9e7SLiu Gang environment area within the remote memory space. The 42420a85a9e7SLiu Gang local device can get the environment from remote memory 4243fc54c7faSLiu Gang space by SRIO or PCIE links. 42440a85a9e7SLiu Gang 42450a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 42460a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 4247fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4248fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 42490a85a9e7SLiu Gang 425051bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 425113a5695bSwdenk 425213a5695bSwdenk Define this if you have a NAND device which you want to use 425313a5695bSwdenk for the environment. 425413a5695bSwdenk 42550e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 42560e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 425713a5695bSwdenk 425813a5695bSwdenk These two #defines specify the offset and size of the environment 4259fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4260fdd813deSScott Wood aligned to an erase block boundary. 42615779d8d9Swdenk 4262fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4263e443c944SMarkus Klotzbuecher 42640e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4265fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4266fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4267fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4268fdd813deSScott Wood aligned to an erase block boundary. 4269e443c944SMarkus Klotzbuecher 4270fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4271fdd813deSScott Wood 4272fdd813deSScott Wood Specifies the length of the region in which the environment 4273fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4274fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4275fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4276fdd813deSScott Wood the range to be avoided. 4277fdd813deSScott Wood 4278fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4279fdd813deSScott Wood 4280fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4281fdd813deSScott Wood environment from block zero's out-of-band data. The 4282fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4283fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4284fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4285e443c944SMarkus Klotzbuecher 4286b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4287b74ab737SGuennadi Liakhovetski 4288b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4289b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4290b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4291b74ab737SGuennadi Liakhovetski 42922b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 42932b74433fSJoe Hershberger 42942b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 42952b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 42962b74433fSJoe Hershberger accesses, which is important on NAND. 42972b74433fSJoe Hershberger 42982b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 42992b74433fSJoe Hershberger 43002b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 43012b74433fSJoe Hershberger 43022b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 43032b74433fSJoe Hershberger 43042b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 43052b74433fSJoe Hershberger environment in. 43062b74433fSJoe Hershberger 4307785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4308785881f7SJoe Hershberger 4309785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4310785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4311785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4312785881f7SJoe Hershberger 43132b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 43142b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 43152b74433fSJoe Hershberger 43162b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 43172b74433fSJoe Hershberger when storing the env in UBI. 43182b74433fSJoe Hershberger 4319d1db76f1SWu, Josh- CONFIG_ENV_IS_IN_FAT: 4320d1db76f1SWu, Josh Define this if you want to use the FAT file system for the environment. 4321d1db76f1SWu, Josh 4322d1db76f1SWu, Josh - FAT_ENV_INTERFACE: 4323d1db76f1SWu, Josh 4324d1db76f1SWu, Josh Define this to a string that is the name of the block device. 4325d1db76f1SWu, Josh 4326d1db76f1SWu, Josh - FAT_ENV_DEV_AND_PART: 4327d1db76f1SWu, Josh 4328d1db76f1SWu, Josh Define this to a string to specify the partition of the device. It can 4329d1db76f1SWu, Josh be as following: 4330d1db76f1SWu, Josh 4331d1db76f1SWu, Josh "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1) 4332d1db76f1SWu, Josh - "D:P": device D partition P. Error occurs if device D has no 4333d1db76f1SWu, Josh partition table. 4334d1db76f1SWu, Josh - "D:0": device D. 4335d1db76f1SWu, Josh - "D" or "D:": device D partition 1 if device D has partition 4336d1db76f1SWu, Josh table, or the whole device D if has no partition 4337d1db76f1SWu, Josh table. 4338d1db76f1SWu, Josh - "D:auto": first partition in device D with bootable flag set. 4339d1db76f1SWu, Josh If none, first valid paratition in device D. If no 4340d1db76f1SWu, Josh partition table then means device D. 4341d1db76f1SWu, Josh 4342d1db76f1SWu, Josh - FAT_ENV_FILE: 4343d1db76f1SWu, Josh 4344d1db76f1SWu, Josh It's a string of the FAT file name. This file use to store the 4345d1db76f1SWu, Josh envrionment. 4346d1db76f1SWu, Josh 4347d1db76f1SWu, Josh - CONFIG_FAT_WRITE: 4348d1db76f1SWu, Josh This should be defined. Otherwise it cannot save the envrionment file. 4349d1db76f1SWu, Josh 435006e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 435106e4ae5fSStephen Warren 435206e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 435306e4ae5fSStephen Warren environment. 435406e4ae5fSStephen Warren 435506e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 435606e4ae5fSStephen Warren 435706e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 435806e4ae5fSStephen Warren 435906e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 436006e4ae5fSStephen Warren 436106e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 436206e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 436306e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 436406e4ae5fSStephen Warren 436506e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 436606e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 436706e4ae5fSStephen Warren 436806e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 436906e4ae5fSStephen Warren area within the specified MMC device. 437006e4ae5fSStephen Warren 43715c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 43725c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 43735c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 43745c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 43755c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 43765c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 43775c088ee8SStephen Warren maximum possible space before it, to store other data. 43785c088ee8SStephen Warren 437906e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 438006e4ae5fSStephen Warren MMC sector boundary. 438106e4ae5fSStephen Warren 438206e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 438306e4ae5fSStephen Warren 438406e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 438506e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 438606e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 438706e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 438806e4ae5fSStephen Warren 43895c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 43905c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 43915c088ee8SStephen Warren 439206e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 439306e4ae5fSStephen Warren an MMC sector boundary. 439406e4ae5fSStephen Warren 439506e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 439606e4ae5fSStephen Warren 439706e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 439806e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 439906e4ae5fSStephen Warren CONFIG_ENV_SIZE. 440006e4ae5fSStephen Warren 44016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4402c609719bSwdenk 4403c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4404c609719bSwdenk area is used at an early stage (ROM part) if the environment 4405c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4406c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4407c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4408c609719bSwdenk to be a good choice since it makes it far enough from the 4409c609719bSwdenk start of the data area as well as from the stack pointer. 4410c609719bSwdenk 4411e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4412c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4413cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4414c609719bSwdenkuntil then to read environment variables. 4415c609719bSwdenk 441685ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 441785ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 441885ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 441985ec0bccSwdenknecessary, because the first environment variable we need is the 442085ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 442185ec0bccSwdenkhave any device yet where we could complain.] 4422c609719bSwdenk 4423c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4424c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 442585ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4426c609719bSwdenk 44276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4428fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4429fc3e2165Swdenk 44306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4431fc3e2165Swdenk also needs to be defined. 4432fc3e2165Swdenk 44336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4434fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4435c609719bSwdenk 4436f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4437f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4438f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4439f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4440f5675aa5SRon Madrid space for already greatly restricted images, including but not 4441f5675aa5SRon Madrid limited to NAND_SPL configurations. 4442f5675aa5SRon Madrid 4443b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4444b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4445b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4446b2b92f53SSimon Glass to do this. 4447b2b92f53SSimon Glass 4448e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4449e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4450e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4451e2e3e2b1SSimon Glass present. 4452e2e3e2b1SSimon Glass 4453feb85801SSascha Silbe- CONFIG_BOARD_SIZE_LIMIT: 4454feb85801SSascha Silbe Maximum size of the U-Boot image. When defined, the 4455feb85801SSascha Silbe build system checks that the actual size does not 4456feb85801SSascha Silbe exceed it. 4457feb85801SSascha Silbe 4458c609719bSwdenkLow Level (hardware related) configuration options: 4459dc7c9a1aSwdenk--------------------------------------------------- 4460c609719bSwdenk 44616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4462c609719bSwdenk Cache Line Size of the CPU. 4463c609719bSwdenk 44646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4465c609719bSwdenk Default address of the IMMR after system reset. 44662535d602Swdenk 44672535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 44682535d602Swdenk and RPXsuper) to be able to adjust the position of 44692535d602Swdenk the IMMR register after a reset. 4470c609719bSwdenk 4471e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4472e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4473e46fedfeSTimur Tabi PowerPC SOCs. 4474e46fedfeSTimur Tabi 4475e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4476e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4477e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4478e46fedfeSTimur Tabi 4479e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4480e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4481e46fedfeSTimur Tabi 4482e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4483e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4484e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4485e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4486e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4487e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4488e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4489e46fedfeSTimur Tabi 4490e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4491e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4492e46fedfeSTimur Tabi 4493e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4494e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4495e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4496e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4497e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4498e46fedfeSTimur Tabi 4499e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4500e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4501e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4502e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4503e46fedfeSTimur Tabi 4504e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4505e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4506e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4507e46fedfeSTimur Tabi 45087f6c2cbcSwdenk- Floppy Disk Support: 45096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 45107f6c2cbcSwdenk 45117f6c2cbcSwdenk the default drive number (default value 0) 45127f6c2cbcSwdenk 45136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 45147f6c2cbcSwdenk 451511ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 45167f6c2cbcSwdenk (default value 1) 45177f6c2cbcSwdenk 45186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 45197f6c2cbcSwdenk 45207f6c2cbcSwdenk defines the offset of register from address. It 45217f6c2cbcSwdenk depends on which part of the data bus is connected to 452211ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 45237f6c2cbcSwdenk 45246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 45256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 45267f6c2cbcSwdenk default value. 45277f6c2cbcSwdenk 45286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 45297f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 45307f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 45317f6c2cbcSwdenk source code. It is used to make hardware dependant 45327f6c2cbcSwdenk initializations. 45337f6c2cbcSwdenk 45340abddf82SMacpaul Lin- CONFIG_IDE_AHB: 45350abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 45360abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 45370abddf82SMacpaul Lin When software is doing ATA command and data transfer to 45380abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 45390abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 45400abddf82SMacpaul Lin is requierd. 45410abddf82SMacpaul Lin 45426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 454325d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 454425d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4545c609719bSwdenk 45466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4547c609719bSwdenk 45487152b1d0Swdenk Start address of memory area that can be used for 4549c609719bSwdenk initial data and stack; please note that this must be 4550c609719bSwdenk writable memory that is working WITHOUT special 4551c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4552c609719bSwdenk will become available only after programming the 4553c609719bSwdenk memory controller and running certain initialization 4554c609719bSwdenk sequences. 4555c609719bSwdenk 4556c609719bSwdenk U-Boot uses the following memory types: 4557c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4558c609719bSwdenk - MPC824X: data cache 4559c609719bSwdenk - PPC4xx: data cache 4560c609719bSwdenk 45616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4562c609719bSwdenk 4563c609719bSwdenk Offset of the initial data structure in the memory 45646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 45656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4566c609719bSwdenk data is located at the end of the available space 4567553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 45686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 45696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 45706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4571c609719bSwdenk 4572c609719bSwdenk Note: 4573c609719bSwdenk On the MPC824X (or other systems that use the data 4574c609719bSwdenk cache for initial memory) the address chosen for 45756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4576c609719bSwdenk point to an otherwise UNUSED address space between 4577c609719bSwdenk the top of RAM and the start of the PCI space. 4578c609719bSwdenk 45796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4580c609719bSwdenk 45816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4582c609719bSwdenk 45836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4584c609719bSwdenk 45856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4586c609719bSwdenk 45876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4588c609719bSwdenk 45896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4590c609719bSwdenk 45916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4592c609719bSwdenk SDRAM timing 4593c609719bSwdenk 45946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4595c609719bSwdenk periodic timer for refresh 4596c609719bSwdenk 45976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4598c609719bSwdenk 45996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 46006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 46016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 46026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4603c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4604c609719bSwdenk 4605c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 46066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 46076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4608c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4609c609719bSwdenk 46106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 46116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4612c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4613c609719bSwdenk Prescaler definitions (SDRAM timing) 4614c609719bSwdenk 46156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4616c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4617c609719bSwdenk define relocation offset in DPRAM [DSP2] 4618c609719bSwdenk 46196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4620b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4621b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4622b423d055SHeiko Schocher 46236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4624c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4625c609719bSwdenk define relocation offset in DPRAM [SCC4] 4626c609719bSwdenk 46276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4628c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4629c609719bSwdenk wrong setting might damage your board. Read 4630c609719bSwdenk doc/README.MBX before setting this variable! 4631c609719bSwdenk 46326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4633ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4634ea909b76Swdenk (Power On Self Tests). This definition overrides 4635ea909b76Swdenk #define'd default value in commproc.h resp. 4636ea909b76Swdenk cpm_8260.h. 4637ea909b76Swdenk 46386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 46396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 46406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 46416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 46426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 46436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 46446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 46456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4646a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 46475d232d0eSwdenk 46489cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 46499cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 46509cacf4fcSDirk Eibach required. 46519cacf4fcSDirk Eibach 465269fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 465369fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 465469fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 465569fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 465669fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 465769fd2d3bSAndrew Sharp by coreboot or similar. 465869fd2d3bSAndrew Sharp 4659842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4660842033e6SGabor Juhos Enable support for indirect PCI bridges. 4661842033e6SGabor Juhos 4662a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4663a09b9b68SKumar Gala Chip has SRIO or not 4664a09b9b68SKumar Gala 4665a09b9b68SKumar Gala- CONFIG_SRIO1: 4666a09b9b68SKumar Gala Board has SRIO 1 port available 4667a09b9b68SKumar Gala 4668a09b9b68SKumar Gala- CONFIG_SRIO2: 4669a09b9b68SKumar Gala Board has SRIO 2 port available 4670a09b9b68SKumar Gala 4671c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4672c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4673c8b28152SLiu Gang 4674a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4675a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4676a09b9b68SKumar Gala 4677a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4678a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4679a09b9b68SKumar Gala 4680a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4681a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4682a09b9b68SKumar Gala 468366bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 468466bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 468566bd1846SFabio Estevam a 16 bit bus. 468666bd1846SFabio Estevam Not all NAND drivers use this symbol. 4687a430e916SFabio Estevam Example of drivers that use it: 468866bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4689a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4690eced4626SAlex Waterman 4691eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4692eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4693eced4626SAlex Waterman a default value will be used. 4694eced4626SAlex Waterman 4695bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4696218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4697218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4698218ca724SWolfgang Denk 4699bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4700bb99ad6dSBen Warren I2C address of the SPD EEPROM 4701bb99ad6dSBen Warren 47026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4703218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4704218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4705218ca724SWolfgang Denk to something your driver can deal with. 4706bb99ad6dSBen Warren 47071b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 47081b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 47091b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 47101b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 47111b3e3c4fSYork Sun header files or board specific files. 47121b3e3c4fSYork Sun 47136f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 47146f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 47156f5e1dc5SYork Sun 47166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4717218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4718218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 47192ad6b513STimur Tabi 4720c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4721c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4722c26e454dSwdenk 4723c26e454dSwdenk- CONFIG_FEC[12]_PHY 4724c26e454dSwdenk Define to the hardcoded PHY address which corresponds 47256e592385Swdenk to the given FEC; i. e. 4726c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4727c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4728c26e454dSwdenk 4729c26e454dSwdenk When set to -1, means to probe for first available. 4730c26e454dSwdenk 4731c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4732c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4733c26e454dSwdenk (so program the FEC to ignore it). 4734c26e454dSwdenk 4735c26e454dSwdenk- CONFIG_RMII 4736c26e454dSwdenk Enable RMII mode for all FECs. 4737c26e454dSwdenk Note that this is a global option, we can't 4738c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4739c26e454dSwdenk 47405cf91d6bSwdenk- CONFIG_CRC32_VERIFY 47415cf91d6bSwdenk Add a verify option to the crc32 command. 47425cf91d6bSwdenk The syntax is: 47435cf91d6bSwdenk 47445cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 47455cf91d6bSwdenk 47465cf91d6bSwdenk Where address/count indicate a memory area 47475cf91d6bSwdenk and crc32 is the correct crc32 which the 47485cf91d6bSwdenk area should have. 47495cf91d6bSwdenk 475056523f12Swdenk- CONFIG_LOOPW 475156523f12Swdenk Add the "loopw" memory command. This only takes effect if 4752602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 475356523f12Swdenk 47547b466641Sstroese- CONFIG_MX_CYCLIC 47557b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 47567b466641Sstroese "md/mw" commands. 47577b466641Sstroese Examples: 47587b466641Sstroese 47597b466641Sstroese => mdc.b 10 4 500 47607b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 47617b466641Sstroese 47627b466641Sstroese => mwc.l 100 12345678 10 47637b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 47647b466641Sstroese 47657b466641Sstroese This only takes effect if the memory commands are activated 4766602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 47677b466641Sstroese 47688aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4769afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4770e03f3169SWolfgang Denk low level initializations (like setting up the memory 4771e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4772e03f3169SWolfgang Denk relocate itself into RAM. 47738aa1a2d1Swdenk 4774e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4775e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4776e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4777e03f3169SWolfgang Denk these initializations itself. 47788aa1a2d1Swdenk 4779401bb30bSAneesh V- CONFIG_SPL_BUILD 4780df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4781df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4782df81238bSMagnus Lilja compiling a NAND SPL. 4783400558b5Swdenk 47843aa29de0SYing Zhang- CONFIG_TPL_BUILD 47853aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 47863aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 47873aa29de0SYing Zhang It is loaded by the SPL. 47883aa29de0SYing Zhang 47895df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 47905df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 47915df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 47925df572f0SYing Zhang previous 4k of the .text section. 47935df572f0SYing Zhang 47944213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 47954213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 47964213fc29SSimon Glass effective address. It is therefore not necessary to regard 47974213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 47984213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 47994213fc29SSimon Glass it maintains its own little RAM buffer which contains all 48004213fc29SSimon Glass addressable memory. This option causes some memory accesses 48014213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 48024213fc29SSimon Glass 4803d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4804d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4805d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4806d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4807d8834a13SMatthias Weisser conditions but may increase the binary size. 4808d8834a13SMatthias Weisser 4809588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4810588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4811588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4812b16f521aSGabe Black 4813fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4814fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4815fc33705eSMark Jackson 4816fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 48175b5ece9eSGabe Black 481816678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 481916678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 482016678eb4SHeiko Schocher 4821999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 4822999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 4823999d7d32SKaricheri, Muralidharan driver that uses this: 4824999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 4825999d7d32SKaricheri, Muralidharan 4826f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4827f2717b47STimur Tabi----------------------------------- 4828f2717b47STimur Tabi 4829f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4830f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4831f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4832f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4833f2717b47STimur Tabiwithin that device. 4834f2717b47STimur Tabi 4835dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4836dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4837dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4838dcf1d774SZhao Qiang is also specified. 4839dcf1d774SZhao Qiang 4840dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4841dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4842f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4843f2717b47STimur Tabi is also specified. 4844f2717b47STimur Tabi 4845f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4846f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4847f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4848f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4849f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4850f2717b47STimur Tabi 4851f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4852f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4853f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4854f2717b47STimur Tabi virtual address in NOR flash. 4855f2717b47STimur Tabi 4856f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4857f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4858f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4859f2717b47STimur Tabi 4860f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4861f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4862f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4863f2717b47STimur Tabi 4864f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4865f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4866f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4867f2717b47STimur Tabi 4868292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4869292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4870292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4871fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4872fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4873fc54c7faSLiu Gang master's memory space. 4874f2717b47STimur Tabi 4875b940ca64SJ. German RiveraFreescale Layerscape Management Complex Firmware Support: 4876b940ca64SJ. German Rivera--------------------------------------------------------- 4877b940ca64SJ. German RiveraThe Freescale Layerscape Management Complex (MC) supports the loading of 4878b940ca64SJ. German Rivera"firmware". 4879b940ca64SJ. German RiveraThis firmware often needs to be loaded during U-Boot booting, so macros 4880b940ca64SJ. German Riveraare used to identify the storage device (NOR flash, SPI, etc) and the address 4881b940ca64SJ. German Riverawithin that device. 4882b940ca64SJ. German Rivera 4883b940ca64SJ. German Rivera- CONFIG_FSL_MC_ENET 4884b940ca64SJ. German Rivera Enable the MC driver for Layerscape SoCs. 4885b940ca64SJ. German Rivera 4886b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_ADDR 4887b940ca64SJ. German Rivera The address in the storage device where the firmware is located. The 4888b940ca64SJ. German Rivera meaning of this address depends on which CONFIG_SYS_LS_MC_FW_IN_xxx macro 4889b940ca64SJ. German Rivera is also specified. 4890b940ca64SJ. German Rivera 4891b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_LENGTH 4892b940ca64SJ. German Rivera The maximum possible size of the firmware. The firmware binary format 4893b940ca64SJ. German Rivera has a field that specifies the actual size of the firmware, but it 4894b940ca64SJ. German Rivera might not be possible to read any part of the firmware unless some 4895b940ca64SJ. German Rivera local storage is allocated to hold the entire firmware first. 4896b940ca64SJ. German Rivera 4897b940ca64SJ. German Rivera- CONFIG_SYS_LS_MC_FW_IN_NOR 4898b940ca64SJ. German Rivera Specifies that MC firmware is located in NOR flash, mapped as 4899b940ca64SJ. German Rivera normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the 4900b940ca64SJ. German Rivera virtual address in NOR flash. 4901b940ca64SJ. German Rivera 4902c609719bSwdenkBuilding the Software: 4903c609719bSwdenk====================== 4904c609719bSwdenk 4905218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4906218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4907218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4908218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4909218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4910218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4911c609719bSwdenk 4912218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4913218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4914218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4915218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4916218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4917c609719bSwdenk 4918218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4919218ca724SWolfgang Denk $ export CROSS_COMPILE 4920c609719bSwdenk 49212f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 49222f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 49232f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 49242f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 49252f8d396bSPeter Tyser 49262f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 49272f8d396bSPeter Tyser 49282f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 49292f8d396bSPeter Tyser be executed on computers running Windows. 49302f8d396bSPeter Tyser 4931c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4932c609719bSwdenksources you must configure U-Boot for one specific board type. This 4933c609719bSwdenkis done by typing: 4934c609719bSwdenk 4935ab584d67SHolger Freyther make NAME_defconfig 4936c609719bSwdenk 4937ab584d67SHolger Freytherwhere "NAME_defconfig" is the name of one of the existing configu- 49384d675ae6SMichael Jonesrations; see boards.cfg for supported names. 493954387ac9Swdenk 4940c609719bSwdenkNote: for some board special configuration names may exist; check if 4941c609719bSwdenk additional information is available from the board vendor; for 49422729af9dSwdenk instance, the TQM823L systems are available without (standard) 49432729af9dSwdenk or with LCD support. You can select such additional "features" 494411ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4945c609719bSwdenk 4946ab584d67SHolger Freyther make TQM823L_defconfig 49472729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4948c609719bSwdenk 4949ab584d67SHolger Freyther make TQM823L_LCD_defconfig 4950c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4951c609719bSwdenk 4952c609719bSwdenk etc. 4953c609719bSwdenk 4954c609719bSwdenk 4955c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 49567152b1d0Swdenkimages ready for download to / installation on your system: 4957c609719bSwdenk 4958c609719bSwdenk- "u-boot.bin" is a raw binary image 4959c609719bSwdenk- "u-boot" is an image in ELF binary format 4960c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4961c609719bSwdenk 4962baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4963baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4964baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4965baf31249SMarian Balakowicz 4966baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4967baf31249SMarian Balakowicz 4968baf31249SMarian Balakowicz make O=/tmp/build distclean 4969ab584d67SHolger Freyther make O=/tmp/build NAME_defconfig 4970baf31249SMarian Balakowicz make O=/tmp/build all 4971baf31249SMarian Balakowicz 4972baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4973baf31249SMarian Balakowicz 4974baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4975baf31249SMarian Balakowicz make distclean 4976ab584d67SHolger Freyther make NAME_defconfig 4977baf31249SMarian Balakowicz make all 4978baf31249SMarian Balakowicz 4979baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4980baf31249SMarian Balakowiczvariable. 4981baf31249SMarian Balakowicz 4982c609719bSwdenk 4983c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4984c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4985c609719bSwdenknative "make". 4986c609719bSwdenk 4987c609719bSwdenk 4988c609719bSwdenkIf the system board that you have is not listed, then you will need 4989c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4990c609719bSwdenksteps: 4991c609719bSwdenk 4992c609719bSwdenk1. Add a new configuration option for your board to the toplevel 49934d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 49944d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4995c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 499685ec0bccSwdenk files you need. In your board directory, you will need at least 499785ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 499885ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 499985ec0bccSwdenk your board 5000c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 5001c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 5002ab584d67SHolger Freyther4. Run "make <board>_defconfig" with your new name. 5003c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 5004c609719bSwdenk to be installed on your target system. 500585ec0bccSwdenk6. Debug and solve any problems that might arise. 5006c609719bSwdenk [Of course, this last step is much harder than it sounds.] 5007c609719bSwdenk 5008c609719bSwdenk 5009c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 5010c609719bSwdenk============================================================== 5011c609719bSwdenk 5012c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 5013c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 5014c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 5015c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 5016218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 5017c609719bSwdenk 5018c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 5019c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 5020c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 5021c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 5022c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 50237152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 5024218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 5025218ca724SWolfgang Denkyou can type 5026c609719bSwdenk 5027c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 5028c609719bSwdenk 5029c609719bSwdenkor to build on a native PowerPC system you can type 5030c609719bSwdenk 5031c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 5032c609719bSwdenk 5033218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 5034218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 5035218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 5036218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 5037218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 5038218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 5039218ca724SWolfgang Denkvariable. For example: 5040baf31249SMarian Balakowicz 5041baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 5042baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 5043baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 5044baf31249SMarian Balakowicz 5045218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 5046218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 5047218ca724SWolfgang Denkduring the whole build process. 5048baf31249SMarian Balakowicz 5049baf31249SMarian Balakowicz 5050c609719bSwdenkSee also "U-Boot Porting Guide" below. 5051c609719bSwdenk 5052c609719bSwdenk 5053c609719bSwdenkMonitor Commands - Overview: 5054c609719bSwdenk============================ 5055c609719bSwdenk 5056c609719bSwdenkgo - start application at address 'addr' 5057c609719bSwdenkrun - run commands in an environment variable 5058c609719bSwdenkbootm - boot application image from memory 5059c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 506044f074c7SMarek Vasutbootz - boot zImage from memory 5061c609719bSwdenktftpboot- boot image via network using TFTP protocol 5062c609719bSwdenk and env variables "ipaddr" and "serverip" 5063c609719bSwdenk (and eventually "gatewayip") 50641fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 5065c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 5066c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 5067c609719bSwdenkloads - load S-Record file over serial line 5068c609719bSwdenkloadb - load binary file over serial line (kermit mode) 5069c609719bSwdenkmd - memory display 5070c609719bSwdenkmm - memory modify (auto-incrementing) 5071c609719bSwdenknm - memory modify (constant address) 5072c609719bSwdenkmw - memory write (fill) 5073c609719bSwdenkcp - memory copy 5074c609719bSwdenkcmp - memory compare 5075c609719bSwdenkcrc32 - checksum calculation 50760f89c54bSPeter Tyseri2c - I2C sub-system 5077c609719bSwdenksspi - SPI utility commands 5078c609719bSwdenkbase - print or set address offset 5079c609719bSwdenkprintenv- print environment variables 5080c609719bSwdenksetenv - set environment variables 5081c609719bSwdenksaveenv - save environment variables to persistent storage 5082c609719bSwdenkprotect - enable or disable FLASH write protection 5083c609719bSwdenkerase - erase FLASH memory 5084c609719bSwdenkflinfo - print FLASH memory information 508510635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 5086c609719bSwdenkbdinfo - print Board Info structure 5087c609719bSwdenkiminfo - print header information for application image 5088c609719bSwdenkconinfo - print console devices and informations 5089c609719bSwdenkide - IDE sub-system 5090c609719bSwdenkloop - infinite loop on address range 509156523f12Swdenkloopw - infinite write loop on address range 5092c609719bSwdenkmtest - simple RAM test 5093c609719bSwdenkicache - enable or disable instruction cache 5094c609719bSwdenkdcache - enable or disable data cache 5095c609719bSwdenkreset - Perform RESET of the CPU 5096c609719bSwdenkecho - echo args to console 5097c609719bSwdenkversion - print monitor version 5098c609719bSwdenkhelp - print online help 5099c609719bSwdenk? - alias for 'help' 5100c609719bSwdenk 5101c609719bSwdenk 5102c609719bSwdenkMonitor Commands - Detailed Description: 5103c609719bSwdenk======================================== 5104c609719bSwdenk 5105c609719bSwdenkTODO. 5106c609719bSwdenk 5107c609719bSwdenkFor now: just type "help <command>". 5108c609719bSwdenk 5109c609719bSwdenk 5110c609719bSwdenkEnvironment Variables: 5111c609719bSwdenk====================== 5112c609719bSwdenk 5113c609719bSwdenkU-Boot supports user configuration using Environment Variables which 5114c609719bSwdenkcan be made persistent by saving to Flash memory. 5115c609719bSwdenk 5116c609719bSwdenkEnvironment Variables are set using "setenv", printed using 5117c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 5118c609719bSwdenkwithout a value can be used to delete a variable from the 5119c609719bSwdenkenvironment. As long as you don't save the environment you are 5120c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 5121c609719bSwdenkenvironment is erased by accident, a default environment is provided. 5122c609719bSwdenk 5123c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 5124c96f86eeSWolfgang Denk 5125c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 5126c609719bSwdenk 5127c609719bSwdenk baudrate - see CONFIG_BAUDRATE 5128c609719bSwdenk 5129c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 5130c609719bSwdenk 5131c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 5132c609719bSwdenk 5133c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 5134c609719bSwdenk 5135c609719bSwdenk bootfile - Name of the image to load with TFTP 5136c609719bSwdenk 51377d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 51387d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51397d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 51407d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 51417d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 51427d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 5143c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 5144c3624e6eSGrant Likely bootm_mapsize. 5145c3624e6eSGrant Likely 5146c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 5147c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 5148c3624e6eSGrant Likely defines the size of the memory region starting at base 5149c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 5150c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 5151c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 5152c3624e6eSGrant Likely used otherwise. 51537d721e34SBartlomiej Sieka 51547d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 51557d721e34SBartlomiej Sieka command can be restricted. This variable is given as 51567d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 51577d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 51587d721e34SBartlomiej Sieka environment variable. 51597d721e34SBartlomiej Sieka 51604bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 51614bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 51624bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 51634bae9090SBartlomiej Sieka 5164c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 5165c609719bSwdenk "bootp" will just load perform a lookup of the 5166c609719bSwdenk configuration from the BOOTP server, but not try to 5167c609719bSwdenk load any image using TFTP 5168c609719bSwdenk 5169c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 5170c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 5171c609719bSwdenk be automatically started (by internally calling 5172c609719bSwdenk "bootm") 5173c609719bSwdenk 51744a6fd34bSwdenk If set to "no", a standalone image passed to the 51754a6fd34bSwdenk "bootm" command will be copied to the load address 51764a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 51774a6fd34bSwdenk This can be used to load and uncompress arbitrary 51784a6fd34bSwdenk data. 51794a6fd34bSwdenk 5180a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 5181a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 5182fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 5183fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 5184fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 5185fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 5186fa34f6b2SShawn Guo device tree blob be copied to the maximum address 5187fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 5188fa34f6b2SShawn Guo access it during the boot procedure. 5189fa34f6b2SShawn Guo 5190a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 5191a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 5192a28afca5SDavid A. Long to work it must reside in writable memory, have 5193a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 5194a28afca5SDavid A. Long add the information it needs into it, and the memory 5195a28afca5SDavid A. Long must be accessible by the kernel. 5196a28afca5SDavid A. Long 5197eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 5198eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 5199eea63e05SSimon Glass defined. 5200eea63e05SSimon Glass 520117ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 520217ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 520317ea1177Swdenk mode (400kHZ). This environment variable is used in 520417ea1177Swdenk initialization code. So, for changes to be effective 520517ea1177Swdenk it must be saved and board must be reset. 520617ea1177Swdenk 5207c609719bSwdenk initrd_high - restrict positioning of initrd images: 5208c609719bSwdenk If this variable is not set, initrd images will be 5209c609719bSwdenk copied to the highest possible address in RAM; this 5210c609719bSwdenk is usually what you want since it allows for 5211c609719bSwdenk maximum initrd size. If for some reason you want to 5212c609719bSwdenk make sure that the initrd image is loaded below the 52136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 5214c609719bSwdenk variable to a value of "no" or "off" or "0". 5215c609719bSwdenk Alternatively, you can set it to a maximum upper 5216c609719bSwdenk address to use (U-Boot will still check that it 5217c609719bSwdenk does not overwrite the U-Boot stack and data). 5218c609719bSwdenk 5219c609719bSwdenk For instance, when you have a system with 16 MB 52207152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 5221c609719bSwdenk you can do this by adding "mem=12M" to the value of 5222c609719bSwdenk the "bootargs" variable. However, now you must make 52237152b1d0Swdenk sure that the initrd image is placed in the first 5224c609719bSwdenk 12 MB as well - this can be done with 5225c609719bSwdenk 5226c609719bSwdenk setenv initrd_high 00c00000 5227c609719bSwdenk 522838b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 522938b99261Swdenk indication to U-Boot that all addresses are legal 523038b99261Swdenk for the Linux kernel, including addresses in flash 523138b99261Swdenk memory. In this case U-Boot will NOT COPY the 523238b99261Swdenk ramdisk at all. This may be useful to reduce the 523338b99261Swdenk boot time on your system, but requires that this 523438b99261Swdenk feature is supported by your Linux kernel. 523538b99261Swdenk 5236c609719bSwdenk ipaddr - IP address; needed for tftpboot command 5237c609719bSwdenk 5238c609719bSwdenk loadaddr - Default load address for commands like "bootp", 5239dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 5240c609719bSwdenk 5241c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 5242c609719bSwdenk 5243c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 5244c609719bSwdenk 5245c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 5246c609719bSwdenk 5247c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 5248c609719bSwdenk 5249c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 5250c609719bSwdenk 5251e2a53458SMike Frysinger ethprime - controls which interface is used first. 5252a3d991bdSwdenk 5253e2a53458SMike Frysinger ethact - controls which interface is currently active. 5254e2a53458SMike Frysinger For example you can do the following 5255a3d991bdSwdenk 525648690d80SHeiko Schocher => setenv ethact FEC 525748690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 525848690d80SHeiko Schocher => setenv ethact SCC 525948690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 5260a3d991bdSwdenk 5261e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 5262e1692577SMatthias Fuchs available network interfaces. 5263e1692577SMatthias Fuchs It just stays at the currently selected interface. 5264e1692577SMatthias Fuchs 5265a3d991bdSwdenk netretry - When set to "no" each network operation will 5266a3d991bdSwdenk either succeed or fail without retrying. 52676e592385Swdenk When set to "once" the network operation will 52686e592385Swdenk fail when all the available network interfaces 52696e592385Swdenk are tried once without success. 5270a3d991bdSwdenk Useful on scripts which control the retry operation 5271a3d991bdSwdenk themselves. 5272a3d991bdSwdenk 5273b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 5274a1cf027aSJean-Christophe PLAGNIOL-VILLARD 52758d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 52768d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 52778d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 52788d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 52798d51aacdSSimon Glass is silent. 52808d51aacdSSimon Glass 528128cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 5282ecb0ccd9SWolfgang Denk UDP source port. 5283ecb0ccd9SWolfgang Denk 528428cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 528528cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 528628cb9375SWolfgang Denk 5287c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 5288c96f86eeSWolfgang Denk we use the TFTP server's default block size 5289c96f86eeSWolfgang Denk 5290c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 5291c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 5292c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 5293c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 5294c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 5295c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 5296c96f86eeSWolfgang Denk with unreliable TFTP servers. 5297c96f86eeSWolfgang Denk 5298a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 529911ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 5300a3d991bdSwdenk VLAN tagged frames. 5301c609719bSwdenk 5302dc0b7b0eSJason HobbsThe following image location variables contain the location of images 5303dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 5304dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 5305dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 5306dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 5307dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 5308dc0b7b0eSJason Hobbsflash or offset in NAND flash. 5309dc0b7b0eSJason Hobbs 5310dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 5311dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 5312dc0b7b0eSJason Hobbsboards use these variables for other purposes. 5313dc0b7b0eSJason Hobbs 5314dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 5315dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5316dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5317dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5318dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5319dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5320dc0b7b0eSJason Hobbs 5321c609719bSwdenkThe following environment variables may be used and automatically 5322c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5323c609719bSwdenkdepending the information provided by your boot server: 5324c609719bSwdenk 5325c609719bSwdenk bootfile - see above 5326c609719bSwdenk dnsip - IP address of your Domain Name Server 5327fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5328c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5329c609719bSwdenk hostname - Target hostname 5330c609719bSwdenk ipaddr - see above 5331c609719bSwdenk netmask - Subnet Mask 5332c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5333c609719bSwdenk serverip - see above 5334c609719bSwdenk 5335c609719bSwdenk 5336c609719bSwdenkThere are two special Environment Variables: 5337c609719bSwdenk 5338c609719bSwdenk serial# - contains hardware identification information such 5339c609719bSwdenk as type string and/or serial number 5340c609719bSwdenk ethaddr - Ethernet address 5341c609719bSwdenk 5342c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5343c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5344c609719bSwdenkonce they have been set once. 5345c609719bSwdenk 5346c609719bSwdenk 5347c1551ea8SstroeseFurther special Environment Variables: 5348c1551ea8Sstroese 5349c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5350c1551ea8Sstroese with the "version" command. This variable is 5351c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5352c1551ea8Sstroese 5353c1551ea8Sstroese 5354c609719bSwdenkPlease note that changes to some configuration parameters may take 5355c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5356c609719bSwdenk 5357c609719bSwdenk 5358170ab110SJoe HershbergerCallback functions for environment variables: 5359170ab110SJoe Hershberger--------------------------------------------- 5360170ab110SJoe Hershberger 5361170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5362170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5363170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5364170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5365170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5366170ab110SJoe Hershberger 5367170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5368170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5369170ab110SJoe Hershberger 5370170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5371170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5372170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5373170ab110SJoe Hershbergerassociations. The list must be in the following format: 5374170ab110SJoe Hershberger 5375170ab110SJoe Hershberger entry = variable_name[:callback_name] 5376170ab110SJoe Hershberger list = entry[,list] 5377170ab110SJoe Hershberger 5378170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5379170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5380170ab110SJoe Hershberger 5381170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5382170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5383170ab110SJoe Hershbergeroverride any association in the static list. You can define 5384170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5385170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5386170ab110SJoe Hershberger 5387170ab110SJoe Hershberger 5388f07771ccSwdenkCommand Line Parsing: 5389f07771ccSwdenk===================== 5390f07771ccSwdenk 5391f07771ccSwdenkThere are two different command line parsers available with U-Boot: 53927152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5393f07771ccSwdenk 5394f07771ccSwdenkOld, simple command line parser: 5395f07771ccSwdenk-------------------------------- 5396f07771ccSwdenk 5397f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5398f07771ccSwdenk- several commands on one line, separated by ';' 5399fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5400f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5401f07771ccSwdenk for example: 5402fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5403f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5404f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5405f07771ccSwdenk 5406f07771ccSwdenkHush shell: 5407f07771ccSwdenk----------- 5408f07771ccSwdenk 5409f07771ccSwdenk- similar to Bourne shell, with control structures like 5410f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5411f07771ccSwdenk until...do...done, ... 5412f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5413f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5414f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5415f07771ccSwdenk command 5416f07771ccSwdenk 5417f07771ccSwdenkGeneral rules: 5418f07771ccSwdenk-------------- 5419f07771ccSwdenk 5420f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5421f07771ccSwdenk command) contains several commands separated by semicolon, and 5422f07771ccSwdenk one of these commands fails, then the remaining commands will be 5423f07771ccSwdenk executed anyway. 5424f07771ccSwdenk 5425f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 542611ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5427f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5428f07771ccSwdenk variables are not executed. 5429f07771ccSwdenk 5430c609719bSwdenkNote for Redundant Ethernet Interfaces: 5431c609719bSwdenk======================================= 5432c609719bSwdenk 543311ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5434c609719bSwdenksuch configurations and is capable of automatic selection of a 54357152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5436c609719bSwdenk 5437c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5438c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5439c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5440c609719bSwdenk 5441c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5442c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5443c609719bSwdenkding setting in the environment; if the corresponding environment 5444c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5445c609719bSwdenk 5446c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5447c609719bSwdenk environment, the SROM's address is used. 5448c609719bSwdenk 5449c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5450c609719bSwdenk environment exists, then the value from the environment variable is 5451c609719bSwdenk used. 5452c609719bSwdenk 5453c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5454c609719bSwdenk both addresses are the same, this MAC address is used. 5455c609719bSwdenk 5456c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5457c609719bSwdenk addresses differ, the value from the environment is used and a 5458c609719bSwdenk warning is printed. 5459c609719bSwdenk 5460c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5461c609719bSwdenk is raised. 5462c609719bSwdenk 5463ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5464ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5465ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5466ecee9324SBen WarrenThe naming convention is as follows: 5467ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5468c609719bSwdenk 5469c609719bSwdenkImage Formats: 5470c609719bSwdenk============== 5471c609719bSwdenk 54723310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 54733310c549SMarian Balakowiczimages in two formats: 54743310c549SMarian Balakowicz 54753310c549SMarian BalakowiczNew uImage format (FIT) 54763310c549SMarian Balakowicz----------------------- 54773310c549SMarian Balakowicz 54783310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 54793310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 54803310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 54813310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 54823310c549SMarian Balakowicz 54833310c549SMarian Balakowicz 54843310c549SMarian BalakowiczOld uImage format 54853310c549SMarian Balakowicz----------------- 54863310c549SMarian Balakowicz 54873310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 54883310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 54893310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5490c609719bSwdenk 5491c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5492c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5493f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5494f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5495f5ed9e39SPeter Tyser INTEGRITY). 54967b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5497afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5498afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5499c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5500c609719bSwdenk* Load Address 5501c609719bSwdenk* Entry Point 5502c609719bSwdenk* Image Name 5503c609719bSwdenk* Image Timestamp 5504c609719bSwdenk 5505c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5506c609719bSwdenkand the data portions of the image are secured against corruption by 5507c609719bSwdenkCRC32 checksums. 5508c609719bSwdenk 5509c609719bSwdenk 5510c609719bSwdenkLinux Support: 5511c609719bSwdenk============== 5512c609719bSwdenk 5513c609719bSwdenkAlthough U-Boot should support any OS or standalone application 55147152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5515c609719bSwdenkU-Boot. 5516c609719bSwdenk 5517c609719bSwdenkU-Boot includes many features that so far have been part of some 5518c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5519c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5520c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 55217152b1d0Swdenkserves several purposes: 5522c609719bSwdenk 5523c609719bSwdenk- the same features can be used for other OS or standalone 5524c609719bSwdenk applications (for instance: using compressed images to reduce the 5525c609719bSwdenk Flash memory footprint) 5526c609719bSwdenk 5527c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 55287152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5529c609719bSwdenk 5530c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5531c609719bSwdenk images; of course this also means that different kernel images can 5532c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5533c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5534c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5535c609719bSwdenk software is easier now. 5536c609719bSwdenk 5537c609719bSwdenk 5538c609719bSwdenkLinux HOWTO: 5539c609719bSwdenk============ 5540c609719bSwdenk 5541c609719bSwdenkPorting Linux to U-Boot based systems: 5542c609719bSwdenk--------------------------------------- 5543c609719bSwdenk 5544c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5545c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5546c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5547c609719bSwdenkLinux :-). 5548c609719bSwdenk 5549a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5550c609719bSwdenk 5551c609719bSwdenkJust make sure your machine specific header file (for instance 5552c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 55531dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 55541dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 55556d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5556c609719bSwdenk 55572eb31b13SSimon GlassNote that U-Boot now has a driver model, a unified model for drivers. 55582eb31b13SSimon GlassIf you are adding a new driver, plumb it into driver model. If there 55592eb31b13SSimon Glassis no uclass available, you are encouraged to create one. See 55602eb31b13SSimon Glassdoc/driver-model. 55612eb31b13SSimon Glass 5562c609719bSwdenk 5563c609719bSwdenkConfiguring the Linux kernel: 5564c609719bSwdenk----------------------------- 5565c609719bSwdenk 5566c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5567c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5568c609719bSwdenk 5569c609719bSwdenk 5570c609719bSwdenkBuilding a Linux Image: 5571c609719bSwdenk----------------------- 5572c609719bSwdenk 557324ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 557424ee89b9Swdenknot used. If you use recent kernel source, a new build target 557524ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 557624ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 557724ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 557824ee89b9Swdenk100% compatible format. 5579c609719bSwdenk 5580c609719bSwdenkExample: 5581c609719bSwdenk 5582ab584d67SHolger Freyther make TQM850L_defconfig 5583c609719bSwdenk make oldconfig 5584c609719bSwdenk make dep 558524ee89b9Swdenk make uImage 5586c609719bSwdenk 558724ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 558824ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 558924ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5590c609719bSwdenk 559124ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 559224ee89b9Swdenk 559324ee89b9Swdenk* convert the kernel into a raw binary image: 559424ee89b9Swdenk 559524ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 559624ee89b9Swdenk -R .note -R .comment \ 559724ee89b9Swdenk -S vmlinux linux.bin 559824ee89b9Swdenk 559924ee89b9Swdenk* compress the binary image: 560024ee89b9Swdenk 560124ee89b9Swdenk gzip -9 linux.bin 560224ee89b9Swdenk 560324ee89b9Swdenk* package compressed binary image for U-Boot: 560424ee89b9Swdenk 560524ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 560624ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 560724ee89b9Swdenk -d linux.bin.gz uImage 560824ee89b9Swdenk 560924ee89b9Swdenk 561024ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 561124ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 561224ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 561324ee89b9Swdenkbyte header containing information about target architecture, 561424ee89b9Swdenkoperating system, image type, compression method, entry points, time 561524ee89b9Swdenkstamp, CRC32 checksums, etc. 561624ee89b9Swdenk 561724ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 561824ee89b9Swdenkprint the header information, or to build new images. 5619c609719bSwdenk 5620c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5621c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5622c609719bSwdenkchecksum verification: 5623c609719bSwdenk 5624c609719bSwdenk tools/mkimage -l image 5625c609719bSwdenk -l ==> list image header information 5626c609719bSwdenk 5627c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5628c609719bSwdenkfrom a "data file" which is used as image payload: 5629c609719bSwdenk 5630c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5631c609719bSwdenk -n name -d data_file image 5632c609719bSwdenk -A ==> set architecture to 'arch' 5633c609719bSwdenk -O ==> set operating system to 'os' 5634c609719bSwdenk -T ==> set image type to 'type' 5635c609719bSwdenk -C ==> set compression type 'comp' 5636c609719bSwdenk -a ==> set load address to 'addr' (hex) 5637c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5638c609719bSwdenk -n ==> set image name to 'name' 5639c609719bSwdenk -d ==> use image data from 'datafile' 5640c609719bSwdenk 564169459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 564269459791Swdenkaddress (0x00000000), but the entry point address depends on the 564369459791Swdenkkernel version: 5644c609719bSwdenk 5645c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 564624ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5647c609719bSwdenk 5648c609719bSwdenkSo a typical call to build a U-Boot image would read: 5649c609719bSwdenk 565024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 565124ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5652a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 565324ee89b9Swdenk > examples/uImage.TQM850L 565424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5655c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5656c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5657c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5658c609719bSwdenk Load Address: 0x00000000 565924ee89b9Swdenk Entry Point: 0x00000000 5660c609719bSwdenk 5661c609719bSwdenkTo verify the contents of the image (or check for corruption): 5662c609719bSwdenk 566324ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 566424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5665c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5666c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5667c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5668c609719bSwdenk Load Address: 0x00000000 566924ee89b9Swdenk Entry Point: 0x00000000 5670c609719bSwdenk 5671c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5672c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5673c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5674c609719bSwdenkneed to be uncompressed: 5675c609719bSwdenk 5676a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 567724ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 567824ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5679a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 568024ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 568124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5682c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5683c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5684c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5685c609719bSwdenk Load Address: 0x00000000 568624ee89b9Swdenk Entry Point: 0x00000000 5687c609719bSwdenk 5688c609719bSwdenk 5689c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5690c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5691c609719bSwdenk 5692c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5693c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5694c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5695c609719bSwdenk Image Name: Simple Ramdisk Image 5696c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5697c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5698c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5699c609719bSwdenk Load Address: 0x00000000 5700c609719bSwdenk Entry Point: 0x00000000 5701c609719bSwdenk 5702a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5703a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5704a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5705a804b5ceSGuilherme Maciel Ferreirafrom the image: 5706a804b5ceSGuilherme Maciel Ferreira 5707a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5708a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5709a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5710a804b5ceSGuilherme Maciel Ferreira 5711c609719bSwdenk 5712c609719bSwdenkInstalling a Linux Image: 5713c609719bSwdenk------------------------- 5714c609719bSwdenk 5715c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5716c609719bSwdenkyou must convert the image to S-Record format: 5717c609719bSwdenk 5718c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5719c609719bSwdenk 5720c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5721c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5722c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5723c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5724c609719bSwdenkcommand. 5725c609719bSwdenk 5726c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5727c609719bSwdenkTQM8xxL is in the first Flash bank): 5728c609719bSwdenk 5729c609719bSwdenk => erase 40100000 401FFFFF 5730c609719bSwdenk 5731c609719bSwdenk .......... done 5732c609719bSwdenk Erased 8 sectors 5733c609719bSwdenk 5734c609719bSwdenk => loads 40100000 5735c609719bSwdenk ## Ready for S-Record download ... 5736c609719bSwdenk ~>examples/image.srec 5737c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5738c609719bSwdenk ... 5739c609719bSwdenk 15989 15990 15991 15992 5740c609719bSwdenk [file transfer complete] 5741c609719bSwdenk [connected] 5742c609719bSwdenk ## Start Addr = 0x00000000 5743c609719bSwdenk 5744c609719bSwdenk 5745c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5746c609719bSwdenkthis includes a checksum verification so you can be sure no data 5747c609719bSwdenkcorruption happened: 5748c609719bSwdenk 5749c609719bSwdenk => imi 40100000 5750c609719bSwdenk 5751c609719bSwdenk ## Checking Image at 40100000 ... 5752c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5753c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5754c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5755c609719bSwdenk Load Address: 00000000 5756c609719bSwdenk Entry Point: 0000000c 5757c609719bSwdenk Verifying Checksum ... OK 5758c609719bSwdenk 5759c609719bSwdenk 5760c609719bSwdenkBoot Linux: 5761c609719bSwdenk----------- 5762c609719bSwdenk 5763c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5764c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5765c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5766c609719bSwdenkparameters. You can check and modify this variable using the 5767c609719bSwdenk"printenv" and "setenv" commands: 5768c609719bSwdenk 5769c609719bSwdenk 5770c609719bSwdenk => printenv bootargs 5771c609719bSwdenk bootargs=root=/dev/ram 5772c609719bSwdenk 5773c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5774c609719bSwdenk 5775c609719bSwdenk => printenv bootargs 5776c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5777c609719bSwdenk 5778c609719bSwdenk => bootm 40020000 5779c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5780c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5781c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5782c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5783c609719bSwdenk Load Address: 00000000 5784c609719bSwdenk Entry Point: 0000000c 5785c609719bSwdenk Verifying Checksum ... OK 5786c609719bSwdenk Uncompressing Kernel Image ... OK 5787c609719bSwdenk 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 5788c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5789c609719bSwdenk time_init: decrementer frequency = 187500000/60 5790c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5791c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5792c609719bSwdenk ... 5793c609719bSwdenk 579411ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 57957152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5796c609719bSwdenkformat!) to the "bootm" command: 5797c609719bSwdenk 5798c609719bSwdenk => imi 40100000 40200000 5799c609719bSwdenk 5800c609719bSwdenk ## Checking Image at 40100000 ... 5801c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5802c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5803c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5804c609719bSwdenk Load Address: 00000000 5805c609719bSwdenk Entry Point: 0000000c 5806c609719bSwdenk Verifying Checksum ... OK 5807c609719bSwdenk 5808c609719bSwdenk ## Checking Image at 40200000 ... 5809c609719bSwdenk Image Name: Simple Ramdisk Image 5810c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5811c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5812c609719bSwdenk Load Address: 00000000 5813c609719bSwdenk Entry Point: 00000000 5814c609719bSwdenk Verifying Checksum ... OK 5815c609719bSwdenk 5816c609719bSwdenk => bootm 40100000 40200000 5817c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5818c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5819c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5820c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5821c609719bSwdenk Load Address: 00000000 5822c609719bSwdenk Entry Point: 0000000c 5823c609719bSwdenk Verifying Checksum ... OK 5824c609719bSwdenk Uncompressing Kernel Image ... OK 5825c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5826c609719bSwdenk Image Name: Simple Ramdisk Image 5827c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5828c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5829c609719bSwdenk Load Address: 00000000 5830c609719bSwdenk Entry Point: 00000000 5831c609719bSwdenk Verifying Checksum ... OK 5832c609719bSwdenk Loading Ramdisk ... OK 5833c609719bSwdenk 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 5834c609719bSwdenk Boot arguments: root=/dev/ram 5835c609719bSwdenk time_init: decrementer frequency = 187500000/60 5836c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5837c609719bSwdenk ... 5838c609719bSwdenk RAMDISK: Compressed image found at block 0 5839c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5840c609719bSwdenk 5841c609719bSwdenk bash# 5842c609719bSwdenk 58430267768eSMatthew McClintockBoot Linux and pass a flat device tree: 58440267768eSMatthew McClintock----------- 58450267768eSMatthew McClintock 58460267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 58470267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 58480267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 58490267768eSMatthew McClintockflat device tree: 58500267768eSMatthew McClintock 58510267768eSMatthew McClintock=> print oftaddr 58520267768eSMatthew McClintockoftaddr=0x300000 58530267768eSMatthew McClintock=> print oft 58540267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 58550267768eSMatthew McClintock=> tftp $oftaddr $oft 58560267768eSMatthew McClintockSpeed: 1000, full duplex 58570267768eSMatthew McClintockUsing TSEC0 device 58580267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 58590267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 58600267768eSMatthew McClintockLoad address: 0x300000 58610267768eSMatthew McClintockLoading: # 58620267768eSMatthew McClintockdone 58630267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 58640267768eSMatthew McClintock=> tftp $loadaddr $bootfile 58650267768eSMatthew McClintockSpeed: 1000, full duplex 58660267768eSMatthew McClintockUsing TSEC0 device 58670267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 58680267768eSMatthew McClintockFilename 'uImage'. 58690267768eSMatthew McClintockLoad address: 0x200000 58700267768eSMatthew McClintockLoading:############ 58710267768eSMatthew McClintockdone 58720267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 58730267768eSMatthew McClintock=> print loadaddr 58740267768eSMatthew McClintockloadaddr=200000 58750267768eSMatthew McClintock=> print oftaddr 58760267768eSMatthew McClintockoftaddr=0x300000 58770267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 58780267768eSMatthew McClintock## Booting image at 00200000 ... 58790267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 58800267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 58810267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 58820267768eSMatthew McClintock Load Address: 00000000 58830267768eSMatthew McClintock Entry Point: 00000000 58840267768eSMatthew McClintock Verifying Checksum ... OK 58850267768eSMatthew McClintock Uncompressing Kernel Image ... OK 58860267768eSMatthew McClintockBooting using flat device tree at 0x300000 58870267768eSMatthew McClintockUsing MPC85xx ADS machine description 58880267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 58890267768eSMatthew McClintock[snip] 58900267768eSMatthew McClintock 58910267768eSMatthew McClintock 58926069ff26SwdenkMore About U-Boot Image Types: 58936069ff26Swdenk------------------------------ 58946069ff26Swdenk 58956069ff26SwdenkU-Boot supports the following image types: 58966069ff26Swdenk 58976069ff26Swdenk "Standalone Programs" are directly runnable in the environment 58986069ff26Swdenk provided by U-Boot; it is expected that (if they behave 58996069ff26Swdenk well) you can continue to work in U-Boot after return from 59006069ff26Swdenk the Standalone Program. 59016069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 59026069ff26Swdenk will take over control completely. Usually these programs 59036069ff26Swdenk will install their own set of exception handlers, device 59046069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 59056069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 59066069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 59076069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 59086069ff26Swdenk being started. 59096069ff26Swdenk "Multi-File Images" contain several images, typically an OS 59106069ff26Swdenk (Linux) kernel image and one or more data images like 59116069ff26Swdenk RAMDisks. This construct is useful for instance when you want 59126069ff26Swdenk to boot over the network using BOOTP etc., where the boot 59136069ff26Swdenk server provides just a single image file, but you want to get 59146069ff26Swdenk for instance an OS kernel and a RAMDisk image. 59156069ff26Swdenk 59166069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 59176069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 59186069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 59196069ff26Swdenk Immediately after the terminating 0 follow the images, one by 59206069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 59216069ff26Swdenk a multiple of 4 bytes). 59226069ff26Swdenk 59236069ff26Swdenk "Firmware Images" are binary images containing firmware (like 59246069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 59256069ff26Swdenk flash memory. 59266069ff26Swdenk 59276069ff26Swdenk "Script files" are command sequences that will be executed by 59286069ff26Swdenk U-Boot's command interpreter; this feature is especially 59296069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 59306069ff26Swdenk as command interpreter. 59316069ff26Swdenk 593244f074c7SMarek VasutBooting the Linux zImage: 593344f074c7SMarek Vasut------------------------- 593444f074c7SMarek Vasut 593544f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 593644f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 593744f074c7SMarek Vasutas the syntax of "bootm" command. 593844f074c7SMarek Vasut 59398ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5940017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5941017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5942017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5943017e1f3fSMarek Vasut 5944c609719bSwdenk 5945c609719bSwdenkStandalone HOWTO: 5946c609719bSwdenk================= 5947c609719bSwdenk 5948c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5949c609719bSwdenkrun "standalone" applications, which can use some resources of 5950c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5951c609719bSwdenk 5952c609719bSwdenkTwo simple examples are included with the sources: 5953c609719bSwdenk 5954c609719bSwdenk"Hello World" Demo: 5955c609719bSwdenk------------------- 5956c609719bSwdenk 5957c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5958c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5959c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5960c609719bSwdenklike that: 5961c609719bSwdenk 5962c609719bSwdenk => loads 5963c609719bSwdenk ## Ready for S-Record download ... 5964c609719bSwdenk ~>examples/hello_world.srec 5965c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5966c609719bSwdenk [file transfer complete] 5967c609719bSwdenk [connected] 5968c609719bSwdenk ## Start Addr = 0x00040004 5969c609719bSwdenk 5970c609719bSwdenk => go 40004 Hello World! This is a test. 5971c609719bSwdenk ## Starting application at 0x00040004 ... 5972c609719bSwdenk Hello World 5973c609719bSwdenk argc = 7 5974c609719bSwdenk argv[0] = "40004" 5975c609719bSwdenk argv[1] = "Hello" 5976c609719bSwdenk argv[2] = "World!" 5977c609719bSwdenk argv[3] = "This" 5978c609719bSwdenk argv[4] = "is" 5979c609719bSwdenk argv[5] = "a" 5980c609719bSwdenk argv[6] = "test." 5981c609719bSwdenk argv[7] = "<NULL>" 5982c609719bSwdenk Hit any key to exit ... 5983c609719bSwdenk 5984c609719bSwdenk ## Application terminated, rc = 0x0 5985c609719bSwdenk 5986c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5987c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5988c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5989c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5990c609719bSwdenkcharacter, but this is just a demo program. The application can be 5991c609719bSwdenkcontrolled by the following keys: 5992c609719bSwdenk 5993c609719bSwdenk ? - print current values og the CPM Timer registers 5994c609719bSwdenk b - enable interrupts and start timer 5995c609719bSwdenk e - stop timer and disable interrupts 5996c609719bSwdenk q - quit application 5997c609719bSwdenk 5998c609719bSwdenk => loads 5999c609719bSwdenk ## Ready for S-Record download ... 6000c609719bSwdenk ~>examples/timer.srec 6001c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 6002c609719bSwdenk [file transfer complete] 6003c609719bSwdenk [connected] 6004c609719bSwdenk ## Start Addr = 0x00040004 6005c609719bSwdenk 6006c609719bSwdenk => go 40004 6007c609719bSwdenk ## Starting application at 0x00040004 ... 6008c609719bSwdenk TIMERS=0xfff00980 6009c609719bSwdenk Using timer 1 6010c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 6011c609719bSwdenk 6012c609719bSwdenkHit 'b': 6013c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 6014c609719bSwdenk Enabling timer 6015c609719bSwdenkHit '?': 6016c609719bSwdenk [q, b, e, ?] ........ 6017c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 6018c609719bSwdenkHit '?': 6019c609719bSwdenk [q, b, e, ?] . 6020c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 6021c609719bSwdenkHit '?': 6022c609719bSwdenk [q, b, e, ?] . 6023c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 6024c609719bSwdenkHit '?': 6025c609719bSwdenk [q, b, e, ?] . 6026c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 6027c609719bSwdenkHit 'e': 6028c609719bSwdenk [q, b, e, ?] ...Stopping timer 6029c609719bSwdenkHit 'q': 6030c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 6031c609719bSwdenk 6032c609719bSwdenk 603385ec0bccSwdenkMinicom warning: 603485ec0bccSwdenk================ 603585ec0bccSwdenk 60367152b1d0SwdenkOver time, many people have reported problems when trying to use the 603785ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 603885ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 6039f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 604085ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 6041e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 6042e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 6043e53515a2SKarl O. Pincfor help with kermit. 6044e53515a2SKarl O. Pinc 604585ec0bccSwdenk 604652f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 604752f52c14Swdenkconfiguration to your "File transfer protocols" section: 604852f52c14Swdenk 604952f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 605052f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 605152f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 605252f52c14Swdenk 605352f52c14Swdenk 6054c609719bSwdenkNetBSD Notes: 6055c609719bSwdenk============= 6056c609719bSwdenk 6057c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 6058c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 6059c609719bSwdenk 6060c609719bSwdenkBuilding requires a cross environment; it is known to work on 6061c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 6062c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 6063c609719bSwdenkNote that the cross-powerpc package does not install include files; 6064c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 6065c609719bSwdenkmissing. This file has to be installed and patched manually: 6066c609719bSwdenk 6067c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 6068c609719bSwdenk # mkdir powerpc 6069c609719bSwdenk # ln -s powerpc machine 6070c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 6071c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 6072c609719bSwdenk 6073c609719bSwdenkNative builds *don't* work due to incompatibilities between native 6074c609719bSwdenkand U-Boot include files. 6075c609719bSwdenk 6076c609719bSwdenkBooting assumes that (the first part of) the image booted is a 6077c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 6078c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 6079c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 60802a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 6081c609719bSwdenk 6082c609719bSwdenk 6083c609719bSwdenkImplementation Internals: 6084c609719bSwdenk========================= 6085c609719bSwdenk 6086c609719bSwdenkThe following is not intended to be a complete description of every 6087c609719bSwdenkimplementation detail. However, it should help to understand the 6088c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 6089c609719bSwdenkhardware. 6090c609719bSwdenk 6091c609719bSwdenk 6092c609719bSwdenkInitial Stack, Global Data: 6093c609719bSwdenk--------------------------- 6094c609719bSwdenk 6095c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 6096c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 6097c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 6098c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 6099c609719bSwdenkis not initialized as zero. To be able to get a C environment working 6100c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 6101c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 6102c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 6103c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 6104c609719bSwdenklocked as (mis-) used as memory, etc. 6105c609719bSwdenk 61067152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 61070668236bSWolfgang Denk U-Boot mailing list: 610843d9616cSwdenk 610943d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 611043d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 611143d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 611243d9616cSwdenk ... 611343d9616cSwdenk 611443d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 611543d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 611643d9616cSwdenk require any physical RAM backing up the cache. The cleverness 611743d9616cSwdenk is that the cache is being used as a temporary supply of 611843d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 611911ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 612043d9616cSwdenk can see how this works by studying the cache architecture and 612143d9616cSwdenk operation in the architecture and processor-specific manuals. 612243d9616cSwdenk 612343d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 612443d9616cSwdenk is another option for the system designer to use as an 612511ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 612643d9616cSwdenk option should work for you. Using CS 4 should be fine if your 612743d9616cSwdenk board designers haven't used it for something that would 612843d9616cSwdenk cause you grief during the initial boot! It is frequently not 612943d9616cSwdenk used. 613043d9616cSwdenk 61316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 613243d9616cSwdenk with your processor/board/system design. The default value 613343d9616cSwdenk you will find in any recent u-boot distribution in 61348a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 613543d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 613643d9616cSwdenk it above 400_0000. Just make sure your board has no resources 613743d9616cSwdenk that are supposed to respond to that address! That code in 613843d9616cSwdenk start.S has been around a while and should work as is when 613943d9616cSwdenk you get the config right. 614043d9616cSwdenk 614143d9616cSwdenk -Chris Hallinan 614243d9616cSwdenk DS4.COM, Inc. 614343d9616cSwdenk 6144c609719bSwdenkIt is essential to remember this, since it has some impact on the C 6145c609719bSwdenkcode for the initialization procedures: 6146c609719bSwdenk 6147c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 6148c609719bSwdenk to write it. 6149c609719bSwdenk 615011ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 6151c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 61527152b1d0Swdenk zation is performed later (when relocating to RAM). 6153c609719bSwdenk 6154c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 6155c609719bSwdenk that. 6156c609719bSwdenk 6157c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 6158c609719bSwdenknormal global data to share information beween the code. But it 6159c609719bSwdenkturned out that the implementation of U-Boot can be greatly 6160c609719bSwdenksimplified by making a global data structure (gd_t) available to all 6161c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 6162c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 6163c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 6164c609719bSwdenkplace a pointer (gd) to the global data into a register which we 6165c609719bSwdenkreserve for this purpose. 6166c609719bSwdenk 61677152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 6168c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 6169c609719bSwdenkGCC's implementation. 6170c609719bSwdenk 6171c609719bSwdenkFor PowerPC, the following registers have specific use: 6172c609719bSwdenk R1: stack pointer 6173e7670f6cSWolfgang Denk R2: reserved for system use 6174c609719bSwdenk R3-R4: parameter passing and return values 6175c609719bSwdenk R5-R10: parameter passing 6176c609719bSwdenk R13: small data area pointer 6177c609719bSwdenk R30: GOT pointer 6178c609719bSwdenk R31: frame pointer 6179c609719bSwdenk 6180e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 6181e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 6182e6bee808SJoakim Tjernlund going back and forth between asm and C) 6183c609719bSwdenk 6184e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 6185c609719bSwdenk 6186c609719bSwdenk Note: on PPC, we could use a static initializer (since the 6187c609719bSwdenk address of the global data structure is known at compile time), 6188c609719bSwdenk but it turned out that reserving a register results in somewhat 6189c609719bSwdenk smaller code - although the code savings are not that big (on 6190c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 6191c609719bSwdenk 624 text + 127 data). 6192c609719bSwdenk 6193c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 61944c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 61954c58eb55SMike Frysinger 6196c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 61974c58eb55SMike Frysinger 6198c609719bSwdenkOn ARM, the following registers are used: 6199c609719bSwdenk 6200c609719bSwdenk R0: function argument word/integer result 6201c609719bSwdenk R1-R3: function argument word 620212eba1b4SJeroen Hofstee R9: platform specific 620312eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 6204c609719bSwdenk R11: argument (frame) pointer 6205c609719bSwdenk R12: temporary workspace 6206c609719bSwdenk R13: stack pointer 6207c609719bSwdenk R14: link register 6208c609719bSwdenk R15: program counter 6209c609719bSwdenk 621012eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 621112eba1b4SJeroen Hofstee 621212eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 6213c609719bSwdenk 62140df01fd3SThomas ChouOn Nios II, the ABI is documented here: 62150df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 62160df01fd3SThomas Chou 62170df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 62180df01fd3SThomas Chou 62190df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 62200df01fd3SThomas Chou to access small data sections, so gp is free. 62210df01fd3SThomas Chou 6222afc1ce82SMacpaul LinOn NDS32, the following registers are used: 6223afc1ce82SMacpaul Lin 6224afc1ce82SMacpaul Lin R0-R1: argument/return 6225afc1ce82SMacpaul Lin R2-R5: argument 6226afc1ce82SMacpaul Lin R15: temporary register for assembler 6227afc1ce82SMacpaul Lin R16: trampoline register 6228afc1ce82SMacpaul Lin R28: frame pointer (FP) 6229afc1ce82SMacpaul Lin R29: global pointer (GP) 6230afc1ce82SMacpaul Lin R30: link register (LP) 6231afc1ce82SMacpaul Lin R31: stack pointer (SP) 6232afc1ce82SMacpaul Lin PC: program counter (PC) 6233afc1ce82SMacpaul Lin 6234afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 6235afc1ce82SMacpaul Lin 6236d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 6237d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 6238c609719bSwdenk 6239c609719bSwdenkMemory Management: 6240c609719bSwdenk------------------ 6241c609719bSwdenk 6242c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 6243c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 6244c609719bSwdenk 6245c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 6246c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 6247c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 6248c609719bSwdenkphysical memory banks. 6249c609719bSwdenk 6250c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 6251c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 6252c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 6253c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 62546d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 6255c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 6256c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 6257c609719bSwdenk 6258c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 6259c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 6260c609719bSwdenk 6261c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 6262c609719bSwdenkthis: 6263c609719bSwdenk 6264c609719bSwdenk 0x0000 0000 Exception Vector code 6265c609719bSwdenk : 6266c609719bSwdenk 0x0000 1FFF 6267c609719bSwdenk 0x0000 2000 Free for Application Use 6268c609719bSwdenk : 6269c609719bSwdenk : 6270c609719bSwdenk 6271c609719bSwdenk : 6272c609719bSwdenk : 6273c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 6274c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 6275c609719bSwdenk 0x00FC 0000 Malloc Arena 6276c609719bSwdenk : 6277c609719bSwdenk 0x00FD FFFF 6278c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 6279c609719bSwdenk ... eventually: LCD or video framebuffer 6280c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 6281c609719bSwdenk 0x00FF FFFF [End of RAM] 6282c609719bSwdenk 6283c609719bSwdenk 6284c609719bSwdenkSystem Initialization: 6285c609719bSwdenk---------------------- 6286c609719bSwdenk 6287c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 628811ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 6289c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 62907152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 6291c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 6292c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 6293c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 6294c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 6295c609719bSwdenkthe caches and the SIU. 6296c609719bSwdenk 6297c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 6298c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 6299c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 6300c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 6301c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 6302c609719bSwdenksimple memory test is run that determines the size of the SDRAM 6303c609719bSwdenkbanks. 6304c609719bSwdenk 6305c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 63067152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 6307c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 6308c609719bSwdenk0x00000000, with any additional banks following immediately to create 6309c609719bSwdenkcontiguous memory starting from 0. 6310c609719bSwdenk 6311c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 6312c609719bSwdenkand allocates memory for use by malloc() and for the global Board 6313c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 6314c609719bSwdenkpages, and the final stack is set up. 6315c609719bSwdenk 6316c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 6317c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 6318c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 6319c609719bSwdenknew address in RAM. 6320c609719bSwdenk 6321c609719bSwdenk 6322c609719bSwdenkU-Boot Porting Guide: 6323c609719bSwdenk---------------------- 6324c609719bSwdenk 6325c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 63266aff3115Swdenklist, October 2002] 6327c609719bSwdenk 6328c609719bSwdenk 6329c609719bSwdenkint main(int argc, char *argv[]) 6330c609719bSwdenk{ 6331c609719bSwdenk sighandler_t no_more_time; 6332c609719bSwdenk 6333c609719bSwdenk signal(SIGALRM, no_more_time); 6334c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6335c609719bSwdenk 6336c609719bSwdenk if (available_money > available_manpower) { 63376c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6338c609719bSwdenk return 0; 6339c609719bSwdenk } 6340c609719bSwdenk 6341c609719bSwdenk Download latest U-Boot source; 6342c609719bSwdenk 63430668236bSWolfgang Denk Subscribe to u-boot mailing list; 63446aff3115Swdenk 63456c3fef28SJerry Van Baren if (clueless) 6346c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6347c609719bSwdenk 6348c609719bSwdenk while (learning) { 6349c609719bSwdenk Read the README file in the top level directory; 63507cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 63516c3fef28SJerry Van Baren Read applicable doc/*.README; 6352c609719bSwdenk Read the source, Luke; 63536c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6354c609719bSwdenk } 6355c609719bSwdenk 63566c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 63576c3fef28SJerry Van Baren Buy a BDI3000; 63586c3fef28SJerry Van Baren else 6359c609719bSwdenk Add a lot of aggravation and time; 6360c609719bSwdenk 63616c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 63626c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 63636c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 63646c3fef28SJerry Van Baren } else { 6365c609719bSwdenk Create your own board support subdirectory; 63666c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 63676c3fef28SJerry Van Baren } 63686c3fef28SJerry Van Baren Edit new board/<myboard> files 63696c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6370c609719bSwdenk 63716c3fef28SJerry Van Baren while (!accepted) { 6372c609719bSwdenk while (!running) { 6373c609719bSwdenk do { 6374c609719bSwdenk Add / modify source code; 6375c609719bSwdenk } until (compiles); 6376c609719bSwdenk Debug; 6377c609719bSwdenk if (clueless) 6378c609719bSwdenk email("Hi, I am having problems..."); 6379c609719bSwdenk } 63806c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 63816c3fef28SJerry Van Baren if (reasonable critiques) 63826c3fef28SJerry Van Baren Incorporate improvements from email list code review; 63836c3fef28SJerry Van Baren else 63846c3fef28SJerry Van Baren Defend code as written; 63856c3fef28SJerry Van Baren } 6386c609719bSwdenk 6387c609719bSwdenk return 0; 6388c609719bSwdenk} 6389c609719bSwdenk 6390c609719bSwdenkvoid no_more_time (int sig) 6391c609719bSwdenk{ 6392c609719bSwdenk hire_a_guru(); 6393c609719bSwdenk} 6394c609719bSwdenk 6395c609719bSwdenk 6396c609719bSwdenkCoding Standards: 6397c609719bSwdenk----------------- 6398c609719bSwdenk 6399c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 64002c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 64017ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6402c609719bSwdenk 64032c051651SDetlev ZundelSource files originating from a different project (for example the 64042c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 64052c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 64062c051651SDetlev Zundelsources. 64072c051651SDetlev Zundel 64082c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 64092c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 64102c051651SDetlev Zundelin your code. 6411c609719bSwdenk 6412c178d3daSwdenkPlease also stick to the following formatting rules: 6413180d3f74Swdenk- remove any trailing white space 64147ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6415180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 64167ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6417180d3f74Swdenk- do not add trailing empty lines to source files 6418180d3f74Swdenk 6419c609719bSwdenkSubmissions which do not conform to the standards may be returned 6420c609719bSwdenkwith a request to reformat the changes. 6421c609719bSwdenk 6422c609719bSwdenk 6423c609719bSwdenkSubmitting Patches: 6424c609719bSwdenk------------------- 6425c609719bSwdenk 6426c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6427c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6428c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6429c609719bSwdenk 64300d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6431218ca724SWolfgang Denk 64320668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 64330668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 64340668236bSWolfgang Denk 6435c609719bSwdenkWhen you send a patch, please include the following information with 6436c609719bSwdenkit: 6437c609719bSwdenk 6438c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6439c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6440c609719bSwdenk patch actually fixes something. 6441c609719bSwdenk 6442c609719bSwdenk* For new features: a description of the feature and your 6443c609719bSwdenk implementation. 6444c609719bSwdenk 6445c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6446c609719bSwdenk 6447c609719bSwdenk* For major contributions, your entry to the CREDITS file 6448c609719bSwdenk 644927af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 645027af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6451c609719bSwdenk 6452c609719bSwdenk* If your patch adds new configuration options, don't forget to 6453c609719bSwdenk document these in the README file. 6454c609719bSwdenk 6455218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6456218ca724SWolfgang Denk recommended) you can easily generate the patch using the 64577ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6458218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6459218ca724SWolfgang Denk with some other mail clients. 6460c609719bSwdenk 6461218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6462218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6463218ca724SWolfgang Denk GNU diff. 64646dff5529Swdenk 6465218ca724SWolfgang Denk The current directory when running this command shall be the parent 6466218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6467218ca724SWolfgang Denk your patch includes sufficient directory information for the 6468218ca724SWolfgang Denk affected files). 6469218ca724SWolfgang Denk 6470218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6471218ca724SWolfgang Denk and compressed attachments must not be used. 6472c609719bSwdenk 647352f52c14Swdenk* If one logical set of modifications affects or creates several 647452f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 647552f52c14Swdenk 647652f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 647752f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 647852f52c14Swdenk 647952f52c14Swdenk 6480c609719bSwdenkNotes: 6481c609719bSwdenk 6482c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6483c609719bSwdenk source tree and make sure that no errors or warnings are reported 6484c609719bSwdenk for any of the boards. 6485c609719bSwdenk 6486c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6487c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6488c609719bSwdenk returned with a request to re-formatting / split it. 6489c609719bSwdenk 6490c609719bSwdenk* If you modify existing code, make sure that your new code does not 6491c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6492c609719bSwdenk When adding new features, these should compile conditionally only 6493c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6494c609719bSwdenk disabled must not need more memory than the old code without your 6495c609719bSwdenk modification. 649690dc6704Swdenk 64970668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 64980668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 64990668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 65000668236bSWolfgang Denk bigger than the size limit should be avoided. 6501