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 255c609719bSwdenkconfigurations available; just type "make <board_name>_config". 256c609719bSwdenk 257c609719bSwdenkExample: For a TQM823L module type: 258c609719bSwdenk 259c609719bSwdenk cd u-boot 260c609719bSwdenk make TQM823L_config 261c609719bSwdenk 26211ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 263c609719bSwdenke.g. "make cogent_mpc8xx_config". 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 10030c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 1004c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 1005602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 1006602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 1007602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 1008602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 10094d98b5c8SVincent Stehlé CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) 1010d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 1011d22c338eSJoe Hershberger (169.254.*.*) 1012602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 1013602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 10144d98b5c8SVincent Stehlé CONFIG_CMD_MD5SUM * print md5 message digest 101502c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 101615a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 1017602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 1018a2681707SWolfgang Denk loop, loopw 10194d98b5c8SVincent Stehlé CONFIG_CMD_MEMTEST * mtest 1020602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 1021602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 1022602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 102368d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 1024602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 1025602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 10264d98b5c8SVincent Stehlé CONFIG_CMD_NFS NFS support 1027e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 1028e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 1029602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 1030602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 1031602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 1032602ad3b3SJon Loeliger host 1033602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 1034ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 1035602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 1036602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 1037d304931fSSimon Glass CONFIG_CMD_SANDBOX * sb command to access sandbox features 1038602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 1039602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 1040602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 1041602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 1042602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 1043602ad3b3SJon Loeliger (4xx only) 1044f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 10454d98b5c8SVincent Stehlé CONFIG_CMD_SHA1SUM * print sha1 memory digest 104602c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 10477d861d95SBob Liu CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x 104874de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 1049602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 10507a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 10511fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 1052da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 1053da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 1054602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 1055602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 1056c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 10574d98b5c8SVincent Stehlé CONFIG_CMD_XIMG Load part of Multi Image 105889c8230dSPrzemyslaw Marczak CONFIG_CMD_UUID * Generate random UUID or GUID string 1059c609719bSwdenk 1060c609719bSwdenk EXAMPLE: If you want all functions except of network 1061c609719bSwdenk support you can write: 1062c609719bSwdenk 1063602ad3b3SJon Loeliger #include "config_cmd_all.h" 1064602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 1065c609719bSwdenk 1066213bf8c8SGerald Van Baren Other Commands: 1067213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 1068c609719bSwdenk 1069c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 1070602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 1071c609719bSwdenk what you (and your U-Boot users) are doing. Data 1072c609719bSwdenk cache cannot be enabled on systems like the 8xx or 1073c609719bSwdenk 8260 (where accesses to the IMMR region must be 1074c609719bSwdenk uncached), and it cannot be disabled on all other 1075c609719bSwdenk systems where we (mis-) use the data cache to hold an 1076c609719bSwdenk initial stack and some data. 1077c609719bSwdenk 1078c609719bSwdenk 1079c609719bSwdenk XXX - this list needs to get updated! 1080c609719bSwdenk 1081a5ecbe62SWolfgang Denk- Regular expression support: 1082a5ecbe62SWolfgang Denk CONFIG_REGEX 1083a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 1084a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 1085a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 1086a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 1087a5ecbe62SWolfgang Denk 108845ba8077SSimon Glass- Device tree: 108945ba8077SSimon Glass CONFIG_OF_CONTROL 109045ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 109145ba8077SSimon Glass to configure its devices, instead of relying on statically 109245ba8077SSimon Glass compiled #defines in the board file. This option is 109345ba8077SSimon Glass experimental and only available on a few boards. The device 109445ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 109545ba8077SSimon Glass 10962c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 10972c0f79e4SSimon Glass be done using one of the two options below: 1098bbb0b128SSimon Glass 1099bbb0b128SSimon Glass CONFIG_OF_EMBED 1100bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 1101bbb0b128SSimon Glass binary in its image. This device tree file should be in the 1102bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 1103bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 1104bbb0b128SSimon Glass the global data structure as gd->blob. 110545ba8077SSimon Glass 11062c0f79e4SSimon Glass CONFIG_OF_SEPARATE 11072c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 11082c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 11092c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 11102c0f79e4SSimon Glass 11112c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 11122c0f79e4SSimon Glass 11132c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 11142c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 11152c0f79e4SSimon Glass still use the individual files if you need something more 11162c0f79e4SSimon Glass exotic. 11172c0f79e4SSimon Glass 1118c609719bSwdenk- Watchdog: 1119c609719bSwdenk CONFIG_WATCHDOG 1120c609719bSwdenk If this variable is defined, it enables watchdog 11216abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 11226abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 11236abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 11246abe6fb6SDetlev Zundel register. When supported for a specific SoC is 11256abe6fb6SDetlev Zundel available, then no further board specific code should 11266abe6fb6SDetlev Zundel be needed to use it. 11276abe6fb6SDetlev Zundel 11286abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 11296abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 11306abe6fb6SDetlev Zundel SoC, then define this variable and provide board 11316abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 1132c609719bSwdenk 1133c1551ea8Sstroese- U-Boot Version: 1134c1551ea8Sstroese CONFIG_VERSION_VARIABLE 1135c1551ea8Sstroese If this variable is defined, an environment variable 1136c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 1137c1551ea8Sstroese version as printed by the "version" command. 1138a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 1139a1ea8e51SBenoît Thébaudeau next reset. 1140c1551ea8Sstroese 1141c609719bSwdenk- Real-Time Clock: 1142c609719bSwdenk 1143602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 1144c609719bSwdenk has to be selected, too. Define exactly one of the 1145c609719bSwdenk following options: 1146c609719bSwdenk 1147c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 1148c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 11494e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 1150c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 11511cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 1152c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 11537f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 11543bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 11559536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 11564c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 11576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 115871d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 115971d19f30SHeiko Schocher RV3029 RTC. 1160c609719bSwdenk 1161b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 1162b37c7e5eSwdenk must also be configured. See I2C Support, below. 1163b37c7e5eSwdenk 1164e92739d3SPeter Tyser- GPIO Support: 1165e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 1166e92739d3SPeter Tyser 11675dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 11685dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 11695dec49caSChris Packham pins supported by a particular chip. 11705dec49caSChris Packham 1171e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1172e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1173e92739d3SPeter Tyser 1174c609719bSwdenk- Timestamp Support: 1175c609719bSwdenk 1176c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1177c609719bSwdenk (date and time) of an image is printed by image 1178c609719bSwdenk commands like bootm or iminfo. This option is 1179602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1180c609719bSwdenk 1181923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1182923c46f9SKarl O. Pinc Zero or more of the following: 1183923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1184923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1185923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1186923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1187923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1188923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1189923c46f9SKarl O. Pinc disk/part_efi.c 1190923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1191c609719bSwdenk 1192602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1193218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1194923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1195c609719bSwdenk 1196c609719bSwdenk- IDE Reset method: 11974d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 11984d13cbadSwdenk board configurations files but used nowhere! 1199c609719bSwdenk 12004d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 12014d13cbadSwdenk be performed by calling the function 12024d13cbadSwdenk ide_set_reset(int reset) 12034d13cbadSwdenk which has to be defined in a board specific file 1204c609719bSwdenk 1205c609719bSwdenk- ATAPI Support: 1206c609719bSwdenk CONFIG_ATAPI 1207c609719bSwdenk 1208c609719bSwdenk Set this to enable ATAPI support. 1209c609719bSwdenk 1210c40b2956Swdenk- LBA48 Support 1211c40b2956Swdenk CONFIG_LBA48 1212c40b2956Swdenk 1213c40b2956Swdenk Set this to enable support for disks larger than 137GB 12144b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1215c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1216c40b2956Swdenk support disks up to 2.1TB. 1217c40b2956Swdenk 12186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1219c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1220c40b2956Swdenk Default is 32bit. 1221c40b2956Swdenk 1222c609719bSwdenk- SCSI Support: 1223c609719bSwdenk At the moment only there is only support for the 1224c609719bSwdenk SYM53C8XX SCSI controller; define 1225c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1226c609719bSwdenk 12276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 12286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 12296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1230c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1231c609719bSwdenk devices. 12326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1233c609719bSwdenk 1234447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1235447c031bSStefan Reinauer SCSI devices found during the last scan. 1236447c031bSStefan Reinauer 1237c609719bSwdenk- NETWORK Support (PCI): 1238682011ffSwdenk CONFIG_E1000 1239ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1240ce5207e1SKyle Moffett 1241ce5207e1SKyle Moffett CONFIG_E1000_SPI 1242ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1243ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1244ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1245ce5207e1SKyle Moffett 1246ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1247ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1248ce5207e1SKyle Moffett example with the "sspi" command. 1249ce5207e1SKyle Moffett 1250ce5207e1SKyle Moffett CONFIG_CMD_E1000 1251ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1252ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1253682011ffSwdenk 1254ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 125511ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1256ac3315c2SAndre Schwarz 1257c609719bSwdenk CONFIG_EEPRO100 1258c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 125911ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1260c609719bSwdenk write routine for first time initialisation. 1261c609719bSwdenk 1262c609719bSwdenk CONFIG_TULIP 1263c609719bSwdenk Support for Digital 2114x chips. 1264c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1265c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1266c609719bSwdenk 1267c609719bSwdenk CONFIG_NATSEMI 1268c609719bSwdenk Support for National dp83815 chips. 1269c609719bSwdenk 1270c609719bSwdenk CONFIG_NS8382X 1271c609719bSwdenk Support for National dp8382[01] gigabit chips. 1272c609719bSwdenk 127345219c46Swdenk- NETWORK Support (other): 127445219c46Swdenk 1275c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1276c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1277c041e9d2SJens Scharsig 1278c041e9d2SJens Scharsig CONFIG_RMII 1279c041e9d2SJens Scharsig Define this to use reduced MII inteface 1280c041e9d2SJens Scharsig 1281c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1282c041e9d2SJens Scharsig If this defined, the driver is quiet. 1283c041e9d2SJens Scharsig The driver doen't show link status messages. 1284c041e9d2SJens Scharsig 1285efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1286efdd7319SRob Herring Support for the Calxeda XGMAC device 1287efdd7319SRob Herring 12883bb46d23SAshok CONFIG_LAN91C96 128945219c46Swdenk Support for SMSC's LAN91C96 chips. 129045219c46Swdenk 129145219c46Swdenk CONFIG_LAN91C96_BASE 129245219c46Swdenk Define this to hold the physical address 129345219c46Swdenk of the LAN91C96's I/O space 129445219c46Swdenk 129545219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 129645219c46Swdenk Define this to enable 32 bit addressing 129745219c46Swdenk 12983bb46d23SAshok CONFIG_SMC91111 1299f39748aeSwdenk Support for SMSC's LAN91C111 chip 1300f39748aeSwdenk 1301f39748aeSwdenk CONFIG_SMC91111_BASE 1302f39748aeSwdenk Define this to hold the physical address 1303f39748aeSwdenk of the device (I/O space) 1304f39748aeSwdenk 1305f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1306f39748aeSwdenk Define this if data bus is 32 bits 1307f39748aeSwdenk 1308f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1309f39748aeSwdenk Define this to use i/o functions instead of macros 1310f39748aeSwdenk (some hardware wont work with macros) 1311f39748aeSwdenk 1312dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1313dc02badaSHeiko Schocher Support for davinci emac 1314dc02badaSHeiko Schocher 1315dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1316dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1317dc02badaSHeiko Schocher 1318b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1319b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1320b3dbf4a5SMacpaul Lin 1321b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1322b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1323b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1324b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1325b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1326b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1327b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1328b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1329b3dbf4a5SMacpaul Lin 1330c2fff331SMike Rapoport CONFIG_SMC911X 1331557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1332557b377dSJens Gehrlein 1333c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1334557b377dSJens Gehrlein Define this to hold the physical address 1335557b377dSJens Gehrlein of the device (I/O space) 1336557b377dSJens Gehrlein 1337c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1338557b377dSJens Gehrlein Define this if data bus is 32 bits 1339557b377dSJens Gehrlein 1340c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1341557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1342557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1343c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1344557b377dSJens Gehrlein 13453d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 13463d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 13473d0075faSYoshihiro Shimoda 13483d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 13493d0075faSYoshihiro Shimoda Define the number of ports to be used 13503d0075faSYoshihiro Shimoda 13513d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 13523d0075faSYoshihiro Shimoda Define the ETH PHY's address 13533d0075faSYoshihiro Shimoda 135468260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 135568260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 135668260aabSYoshihiro Shimoda 13575e124724SVadim Bendebury- TPM Support: 135890899cc0SChe-liang Chiou CONFIG_TPM 135990899cc0SChe-liang Chiou Support TPM devices. 136090899cc0SChe-liang Chiou 13611b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C 13621b393db5STom Wai-Hong Tam Support for i2c bus TPM devices. Only one device 13631b393db5STom Wai-Hong Tam per system is supported at this time. 13641b393db5STom Wai-Hong Tam 13651b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BUS_NUMBER 13661b393db5STom Wai-Hong Tam Define the the i2c bus number for the TPM device 13671b393db5STom Wai-Hong Tam 13681b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_SLAVE_ADDRESS 13691b393db5STom Wai-Hong Tam Define the TPM's address on the i2c bus 13701b393db5STom Wai-Hong Tam 13711b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 13721b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 13731b393db5STom Wai-Hong Tam 1374c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1375c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1376c01939c7SDirk Eibach 137790899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 13785e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 13795e124724SVadim Bendebury per system is supported at this time. 13805e124724SVadim Bendebury 13815e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 13825e124724SVadim Bendebury Base address where the generic TPM device is mapped 13835e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 13845e124724SVadim Bendebury 0xfed40000. 13855e124724SVadim Bendebury 1386be6c1529SReinhard Pfau CONFIG_CMD_TPM 1387be6c1529SReinhard Pfau Add tpm monitor functions. 1388be6c1529SReinhard Pfau Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also 1389be6c1529SReinhard Pfau provides monitor access to authorized functions. 1390be6c1529SReinhard Pfau 1391be6c1529SReinhard Pfau CONFIG_TPM 1392be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1393be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1394be6c1529SReinhard Pfau Requires support for a TPM device. 1395be6c1529SReinhard Pfau 1396be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1397be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1398be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1399be6c1529SReinhard Pfau 1400c609719bSwdenk- USB Support: 1401c609719bSwdenk At the moment only the UHCI host controller is 14024d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1403c609719bSwdenk CONFIG_USB_UHCI to enable it. 1404c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 140530d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1406c609719bSwdenk storage devices. 1407c609719bSwdenk Note: 1408c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1409c609719bSwdenk (TEAC FD-05PUB). 14104d13cbadSwdenk MPC5200 USB requires additional defines: 14114d13cbadSwdenk CONFIG_USB_CLOCK 14124d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1413307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1414307ecb6dSEric Millbrandt for USB on PSC3 14154d13cbadSwdenk CONFIG_USB_CONFIG 14164d13cbadSwdenk for differential drivers: 0x00001000 14174d13cbadSwdenk for single ended drivers: 0x00005000 1418307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1419307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 14206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1421fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1422fdcfaa1bSZhang Wei instead of using asynchronous interrupts 14234d13cbadSwdenk 14249ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 14259ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 14269ab4ce22SSimon Glass 1427aa155058SKuo-Jung Su CONFIG_USB_HUB_MIN_POWER_ON_DELAY defines the minimum 1428aa155058SKuo-Jung Su interval for usb hub power-on delay.(minimum 100msec) 1429aa155058SKuo-Jung Su 143016c8d5e7SWolfgang Denk- USB Device: 143116c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 143216c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 143316c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 143411ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 143516c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 143616c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 143716c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 143816c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 143916c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 144016c8d5e7SWolfgang Denk a Linux host by 144116c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 144216c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 144316c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 144416c8d5e7SWolfgang Denk might be defined in YourBoardName.h 144516c8d5e7SWolfgang Denk 144616c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 144716c8d5e7SWolfgang Denk Define this to build a UDC device 144816c8d5e7SWolfgang Denk 144916c8d5e7SWolfgang Denk CONFIG_USB_TTY 145016c8d5e7SWolfgang Denk Define this to have a tty type of device available to 145116c8d5e7SWolfgang Denk talk to the UDC device 145216c8d5e7SWolfgang Denk 1453f9da0f89SVipin KUMAR CONFIG_USBD_HS 1454f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1455f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1456f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1457f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1458f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1459f9da0f89SVipin KUMAR speed. 1460f9da0f89SVipin KUMAR 14616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 146216c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 146316c8d5e7SWolfgang Denk be set to usbtty. 146416c8d5e7SWolfgang Denk 146516c8d5e7SWolfgang Denk mpc8xx: 14666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 146716c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 14686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 146916c8d5e7SWolfgang Denk 14706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 147116c8d5e7SWolfgang Denk Derive USB clock from brgclk 14726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 147316c8d5e7SWolfgang Denk 147416c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 147516c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 147616c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 147716c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 147816c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 147916c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 148016c8d5e7SWolfgang Denk 148116c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 148216c8d5e7SWolfgang Denk Define this string as the name of your company for 148316c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 148416c8d5e7SWolfgang Denk 148516c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 148616c8d5e7SWolfgang Denk Define this string as the name of your product 148716c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 148816c8d5e7SWolfgang Denk 148916c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 149016c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 149116c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 149216c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 149316c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 149416c8d5e7SWolfgang Denk 149516c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 149616c8d5e7SWolfgang Denk Define this as the unique Product ID 149716c8d5e7SWolfgang Denk for your device 149816c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1499c609719bSwdenk 1500d70a560fSIgor Grinberg- ULPI Layer Support: 1501d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1502d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1503d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1504d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1505d70a560fSIgor Grinberg viewport is supported. 1506d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1507d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 15086d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 15096d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 15106d365ea0SLucas Stach the appropriate value in Hz. 1511c609719bSwdenk 1512c609719bSwdenk- MMC Support: 1513c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1514c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1515c609719bSwdenk accessed from the boot prompt by mapping the device 1516c609719bSwdenk to physical memory similar to flash. Command line is 1517602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1518602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1519c609719bSwdenk 1520afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1521afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1522afb35666SYoshihiro Shimoda 1523afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1524afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1525afb35666SYoshihiro Shimoda 1526afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1527afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1528afb35666SYoshihiro Shimoda 15291fd93c6eSPierre Aubert CONFIG_GENERIC_MMC 15301fd93c6eSPierre Aubert Enable the generic MMC driver 15311fd93c6eSPierre Aubert 15321fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_BOOT 15331fd93c6eSPierre Aubert Enable some additional features of the eMMC boot partitions. 15341fd93c6eSPierre Aubert 15351fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_RPMB 15361fd93c6eSPierre Aubert Enable the commands for reading, writing and programming the 15371fd93c6eSPierre Aubert key for the Replay Protection Memory Block partition in eMMC. 15381fd93c6eSPierre Aubert 1539b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 1540b3ba6e94STom Rini CONFIG_DFU_FUNCTION 1541b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1542b3ba6e94STom Rini 1543b3ba6e94STom Rini CONFIG_CMD_DFU 1544b3ba6e94STom Rini This enables the command "dfu" which is used to have 1545b3ba6e94STom Rini U-Boot create a DFU class device via USB. This command 1546b3ba6e94STom Rini requires that the "dfu_alt_info" environment variable be 1547b3ba6e94STom Rini set and define the alt settings to expose to the host. 1548b3ba6e94STom Rini 1549b3ba6e94STom Rini CONFIG_DFU_MMC 1550b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1551b3ba6e94STom Rini 1552c6631764SPantelis Antoniou CONFIG_DFU_NAND 1553c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1554c6631764SPantelis Antoniou 1555a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1556a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1557a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1558a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1559a9479f04SAfzal Mohammed one that would help mostly the developer. 1560a9479f04SAfzal Mohammed 1561e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1562e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1563e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1564e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1565e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1566e7e75c70SHeiko Schocher 1567ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1568ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1569ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1570ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1571ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1572ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1573ea2453d5SPantelis Antoniou 1574001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1575001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1576001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1577001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1578001a8319SHeiko Schocher 1579001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1580001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1581001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1582001a8319SHeiko Schocher sending again an USB request to the device. 1583001a8319SHeiko Schocher 15843aab70afSSebastian Siewior- USB Device Android Fastboot support: 15853aab70afSSebastian Siewior CONFIG_CMD_FASTBOOT 15863aab70afSSebastian Siewior This enables the command "fastboot" which enables the Android 15873aab70afSSebastian Siewior fastboot mode for the platform's USB device. Fastboot is a USB 15883aab70afSSebastian Siewior protocol for downloading images, flashing and device control 15893aab70afSSebastian Siewior used on Android devices. 15903aab70afSSebastian Siewior See doc/README.android-fastboot for more information. 15913aab70afSSebastian Siewior 15923aab70afSSebastian Siewior CONFIG_ANDROID_BOOT_IMAGE 15933aab70afSSebastian Siewior This enables support for booting images which use the Android 15943aab70afSSebastian Siewior image format header. 15953aab70afSSebastian Siewior 15963aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_ADDR 15973aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 15983aab70afSSebastian Siewior downloads. Define this to the starting RAM address to use for 15993aab70afSSebastian Siewior downloaded images. 16003aab70afSSebastian Siewior 16013aab70afSSebastian Siewior CONFIG_USB_FASTBOOT_BUF_SIZE 16023aab70afSSebastian Siewior The fastboot protocol requires a large memory buffer for 16033aab70afSSebastian Siewior downloads. This buffer should be as large as possible for a 16043aab70afSSebastian Siewior platform. Define this to the size available RAM for fastboot. 16053aab70afSSebastian Siewior 16066705d81eSwdenk- Journaling Flash filesystem support: 16076705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 16086705d81eSwdenk CONFIG_JFFS2_NAND_DEV 16096705d81eSwdenk Define these for a default partition on a NAND device 16106705d81eSwdenk 16116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 16126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 16136705d81eSwdenk Define these for a default partition on a NOR device 16146705d81eSwdenk 16156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 16166705d81eSwdenk Define this to create an own partition. You have to provide a 16176705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 16186705d81eSwdenk 16196705d81eSwdenk If you define only one JFFS2 partition you may also want to 16206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 16216705d81eSwdenk to disable the command chpart. This is the default when you 16226705d81eSwdenk have not defined a custom partition 16236705d81eSwdenk 1624c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1625c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1626656f4c65SDonggeun Kim 1627656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1628656f4c65SDonggeun Kim file in FAT formatted partition. 1629656f4c65SDonggeun Kim 1630656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1631656f4c65SDonggeun Kim user to write files to FAT. 1632c30a15e5SDonggeun Kim 163384cd9327SGabe BlackCBFS (Coreboot Filesystem) support 163484cd9327SGabe Black CONFIG_CMD_CBFS 163584cd9327SGabe Black 163684cd9327SGabe Black Define this to enable support for reading from a Coreboot 163784cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 163884cd9327SGabe Black and cbfsload. 163984cd9327SGabe Black 16404f0d1a2aSSiva Durga Prasad Paladugu- FAT(File Allocation Table) filesystem cluster size: 16414f0d1a2aSSiva Durga Prasad Paladugu CONFIG_FS_FAT_MAX_CLUSTSIZE 16424f0d1a2aSSiva Durga Prasad Paladugu 16434f0d1a2aSSiva Durga Prasad Paladugu Define the max cluster size for fat operations else 16444f0d1a2aSSiva Durga Prasad Paladugu a default value of 65536 will be defined. 16454f0d1a2aSSiva Durga Prasad Paladugu 1646c609719bSwdenk- Keyboard Support: 1647c609719bSwdenk CONFIG_ISA_KEYBOARD 1648c609719bSwdenk 1649c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1650c609719bSwdenk support 1651c609719bSwdenk 1652c609719bSwdenk CONFIG_I8042_KBD 1653c609719bSwdenk Standard PC keyboard driver with US (is default) and 1654c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1655c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1656c609719bSwdenk for cfb_console. Supports cursor blinking. 1657c609719bSwdenk 1658713cb680SHung-ying Tyan CONFIG_CROS_EC_KEYB 1659713cb680SHung-ying Tyan Enables a Chrome OS keyboard using the CROS_EC interface. 1660713cb680SHung-ying Tyan This uses CROS_EC to communicate with a second microcontroller 1661713cb680SHung-ying Tyan which provides key scans on request. 1662713cb680SHung-ying Tyan 1663c609719bSwdenk- Video support: 1664c609719bSwdenk CONFIG_VIDEO 1665c609719bSwdenk 1666c609719bSwdenk Define this to enable video support (for output to 1667c609719bSwdenk video). 1668c609719bSwdenk 1669c609719bSwdenk CONFIG_VIDEO_CT69000 1670c609719bSwdenk 1671c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1672c609719bSwdenk 1673c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1674eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1675eeb1b77bSwdenk video output is selected via environment 'videoout' 1676eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1677eeb1b77bSwdenk assumed. 1678c609719bSwdenk 1679eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 168011ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1681eeb1b77bSwdenk are possible: 1682eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1683eeb1b77bSwdenk Following standard modes are supported (* is default): 1684eeb1b77bSwdenk 1685eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1686eeb1b77bSwdenk -------------+--------------------------------------------- 1687eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1688eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1689eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1690eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1691eeb1b77bSwdenk -------------+--------------------------------------------- 1692c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1693c609719bSwdenk 1694eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 16957817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1696eeb1b77bSwdenk 1697eeb1b77bSwdenk 1698a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1699a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1700a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1701a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1702a6c7ad2fSwdenk 17037d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 17047d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 17057d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 17067d3053fbSTimur Tabi support, and should also define these other macros: 17077d3053fbSTimur Tabi 17087d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 17097d3053fbSTimur Tabi CONFIG_VIDEO 17107d3053fbSTimur Tabi CONFIG_CMD_BMP 17117d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 17127d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 17137d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 17147d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 17157d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 17167d3053fbSTimur Tabi 1717ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1718ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1719ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1720ba8e76bdSTimur Tabi description of this variable. 17217d3053fbSTimur Tabi 1722058d59b0SSimon Glass CONFIG_VIDEO_VGA 1723058d59b0SSimon Glass 1724058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1725058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1726058d59b0SSimon Glass driver. 1727058d59b0SSimon Glass 1728058d59b0SSimon Glass 1729682011ffSwdenk- Keyboard Support: 1730682011ffSwdenk CONFIG_KEYBOARD 1731682011ffSwdenk 1732682011ffSwdenk Define this to enable a custom keyboard support. 1733682011ffSwdenk This simply calls drv_keyboard_init() which must be 1734682011ffSwdenk defined in your board-specific files. 1735682011ffSwdenk The only board using this so far is RBC823. 1736a6c7ad2fSwdenk 1737c609719bSwdenk- LCD Support: CONFIG_LCD 1738c609719bSwdenk 1739c609719bSwdenk Define this to enable LCD support (for output to LCD 1740c609719bSwdenk display); also select one of the supported displays 1741c609719bSwdenk by defining one of these: 1742c609719bSwdenk 174339cf4804SStelian Pop CONFIG_ATMEL_LCD: 174439cf4804SStelian Pop 174539cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 174639cf4804SStelian Pop 1747fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1748c609719bSwdenk 1749fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1750c609719bSwdenk 1751fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1752c609719bSwdenk 1753fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1754fd3103bbSwdenk Active, color, single scan. 1755fd3103bbSwdenk 1756fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1757fd3103bbSwdenk 1758fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1759c609719bSwdenk Active, color, single scan. 1760c609719bSwdenk 1761c609719bSwdenk CONFIG_SHARP_16x9 1762c609719bSwdenk 1763c609719bSwdenk Sharp 320x240. Active, color, single scan. 1764c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1765c609719bSwdenk 1766c609719bSwdenk CONFIG_SHARP_LQ64D341 1767c609719bSwdenk 1768c609719bSwdenk Sharp LQ64D341 display, 640x480. 1769c609719bSwdenk Active, color, single scan. 1770c609719bSwdenk 1771c609719bSwdenk CONFIG_HLD1045 1772c609719bSwdenk 1773c609719bSwdenk HLD1045 display, 640x480. 1774c609719bSwdenk Active, color, single scan. 1775c609719bSwdenk 1776c609719bSwdenk CONFIG_OPTREX_BW 1777c609719bSwdenk 1778c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1779c609719bSwdenk or 1780c609719bSwdenk Hitachi LMG6912RPFC-00T 1781c609719bSwdenk or 1782c609719bSwdenk Hitachi SP14Q002 1783c609719bSwdenk 1784c609719bSwdenk 320x240. Black & white. 1785c609719bSwdenk 1786c609719bSwdenk Normally display is black on white background; define 17876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1788c609719bSwdenk 1789676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1790676d319eSSimon Glass 1791676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1792676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1793676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1794676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1795676d319eSSimon Glass a per-section basis. 1796676d319eSSimon Glass 17970d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 17980d89efefSSimon Glass 17990d89efefSSimon Glass When the console need to be scrolled, this is the number of 18000d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 18010d89efefSSimon Glass the console jump but can help speed up operation when scrolling 18020d89efefSSimon Glass is slow. 1803676d319eSSimon Glass 180445d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 180545d7f525STom Wai-Hong Tam 180645d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 180745d7f525STom Wai-Hong Tam 1808735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1809735987c5STom Wai-Hong Tam 1810735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1811735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1812735987c5STom Wai-Hong Tam 18137152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1814d791b1dcSwdenk 1815d791b1dcSwdenk If this option is set, the environment is checked for 1816d791b1dcSwdenk a variable "splashimage". If found, the usual display 1817d791b1dcSwdenk of logo, copyright and system information on the LCD 1818e94d2cd9Swdenk is suppressed and the BMP image at the address 1819d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1820d791b1dcSwdenk console is redirected to the "nulldev", too. This 1821d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1822d791b1dcSwdenk loaded very quickly after power-on. 1823d791b1dcSwdenk 1824c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1825c0880485SNikita Kiryanov 1826c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1827c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 18281551df35STom Rini (see README.displaying-bmps). 1829c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1830c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1831c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1832c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1833c0880485SNikita Kiryanov there is no need to set this option. 1834c0880485SNikita Kiryanov 18351ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 18361ca298ceSMatthias Weisser 18371ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 18381ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 18391ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 18401ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 18411ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 18421ca298ceSMatthias Weisser specify 'm' for centering the image. 18431ca298ceSMatthias Weisser 18441ca298ceSMatthias Weisser Example: 18451ca298ceSMatthias Weisser setenv splashpos m,m 18461ca298ceSMatthias Weisser => image at center of screen 18471ca298ceSMatthias Weisser 18481ca298ceSMatthias Weisser setenv splashpos 30,20 18491ca298ceSMatthias Weisser => image at x = 30 and y = 20 18501ca298ceSMatthias Weisser 18511ca298ceSMatthias Weisser setenv splashpos -10,m 18521ca298ceSMatthias Weisser => vertically centered image 18531ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 18541ca298ceSMatthias Weisser 185598f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 185698f4a3dfSStefan Roese 185798f4a3dfSStefan Roese If this option is set, additionally to standard BMP 185898f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 185998f4a3dfSStefan Roese splashscreen support or the bmp command. 186098f4a3dfSStefan Roese 1861d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1862d5011762SAnatolij Gustschin 1863d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1864d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1865d5011762SAnatolij Gustschin bmp command. 1866d5011762SAnatolij Gustschin 1867f2b96dfbSLei Wen- Do compresssing for memory range: 1868f2b96dfbSLei Wen CONFIG_CMD_ZIP 1869f2b96dfbSLei Wen 1870f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1871f2b96dfbSLei Wen to compress the specified memory at its best effort. 1872f2b96dfbSLei Wen 1873c29fdfc1Swdenk- Compression support: 18748ef70478SKees Cook CONFIG_GZIP 18758ef70478SKees Cook 18768ef70478SKees Cook Enabled by default to support gzip compressed images. 18778ef70478SKees Cook 1878c29fdfc1Swdenk CONFIG_BZIP2 1879c29fdfc1Swdenk 1880c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1881c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1882c29fdfc1Swdenk compressed images are supported. 1883c29fdfc1Swdenk 1884c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 18856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1886c29fdfc1Swdenk be at least 4MB. 1887d791b1dcSwdenk 1888fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1889fc9c1727SLuigi 'Comio' Mantellini 1890fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1891fc9c1727SLuigi 'Comio' Mantellini images is included. 1892fc9c1727SLuigi 'Comio' Mantellini 1893fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1894fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1895fc9c1727SLuigi 'Comio' Mantellini formula: 1896fc9c1727SLuigi 'Comio' Mantellini 1897fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1898fc9c1727SLuigi 'Comio' Mantellini 1899fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1900fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1901fc9c1727SLuigi 'Comio' Mantellini 1902fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1903fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1904fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1905fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1906fc9c1727SLuigi 'Comio' Mantellini 1907fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1908fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 19096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1910fc9c1727SLuigi 'Comio' Mantellini 19118ef70478SKees Cook CONFIG_LZO 19128ef70478SKees Cook 19138ef70478SKees Cook If this option is set, support for LZO compressed images 19148ef70478SKees Cook is included. 19158ef70478SKees Cook 191617ea1177Swdenk- MII/PHY support: 191717ea1177Swdenk CONFIG_PHY_ADDR 191817ea1177Swdenk 191917ea1177Swdenk The address of PHY on MII bus. 192017ea1177Swdenk 192117ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 192217ea1177Swdenk 192317ea1177Swdenk The clock frequency of the MII bus 192417ea1177Swdenk 192517ea1177Swdenk CONFIG_PHY_GIGE 192617ea1177Swdenk 192717ea1177Swdenk If this option is set, support for speed/duplex 192811ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 192917ea1177Swdenk 193017ea1177Swdenk CONFIG_PHY_RESET_DELAY 193117ea1177Swdenk 193217ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 193317ea1177Swdenk reset before any MII register access is possible. 193417ea1177Swdenk For such PHY, set this option to the usec delay 193517ea1177Swdenk required. (minimum 300usec for LXT971A) 193617ea1177Swdenk 193717ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 193817ea1177Swdenk 193917ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 194017ea1177Swdenk command issued before MII status register can be read 194117ea1177Swdenk 1942c609719bSwdenk- Ethernet address: 1943c609719bSwdenk CONFIG_ETHADDR 1944c68a05feSrichardretanubun CONFIG_ETH1ADDR 1945c609719bSwdenk CONFIG_ETH2ADDR 1946c609719bSwdenk CONFIG_ETH3ADDR 1947c68a05feSrichardretanubun CONFIG_ETH4ADDR 1948c68a05feSrichardretanubun CONFIG_ETH5ADDR 1949c609719bSwdenk 195011ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 195111ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1952c609719bSwdenk is not determined automatically. 1953c609719bSwdenk 1954c609719bSwdenk- IP address: 1955c609719bSwdenk CONFIG_IPADDR 1956c609719bSwdenk 1957c609719bSwdenk Define a default value for the IP address to use for 195811ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1959c609719bSwdenk determined through e.g. bootp. 19601ebcd654SWolfgang Denk (Environment variable "ipaddr") 1961c609719bSwdenk 1962c609719bSwdenk- Server IP address: 1963c609719bSwdenk CONFIG_SERVERIP 1964c609719bSwdenk 1965c609719bSwdenk Defines a default value for the IP address of a TFTP 1966c609719bSwdenk server to contact when using the "tftboot" command. 19671ebcd654SWolfgang Denk (Environment variable "serverip") 1968c609719bSwdenk 196997cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 197097cfe861SRobin Getz 197197cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 197297cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 197397cfe861SRobin Getz 19741ebcd654SWolfgang Denk- Gateway IP address: 19751ebcd654SWolfgang Denk CONFIG_GATEWAYIP 19761ebcd654SWolfgang Denk 19771ebcd654SWolfgang Denk Defines a default value for the IP address of the 19781ebcd654SWolfgang Denk default router where packets to other networks are 19791ebcd654SWolfgang Denk sent to. 19801ebcd654SWolfgang Denk (Environment variable "gatewayip") 19811ebcd654SWolfgang Denk 19821ebcd654SWolfgang Denk- Subnet mask: 19831ebcd654SWolfgang Denk CONFIG_NETMASK 19841ebcd654SWolfgang Denk 19851ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 19861ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 19871ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 19881ebcd654SWolfgang Denk forwarded through a router. 19891ebcd654SWolfgang Denk (Environment variable "netmask") 19901ebcd654SWolfgang Denk 199153a5c424SDavid Updegraff- Multicast TFTP Mode: 199253a5c424SDavid Updegraff CONFIG_MCAST_TFTP 199353a5c424SDavid Updegraff 199453a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 199553a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 199611ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 199753a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 199853a5c424SDavid Updegraff multicast group. 199953a5c424SDavid Updegraff 2000c609719bSwdenk- BOOTP Recovery Mode: 2001c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 2002c609719bSwdenk 2003c609719bSwdenk If you have many targets in a network that try to 2004c609719bSwdenk boot using BOOTP, you may want to avoid that all 2005c609719bSwdenk systems send out BOOTP requests at precisely the same 2006c609719bSwdenk moment (which would happen for instance at recovery 2007c609719bSwdenk from a power failure, when all systems will try to 2008c609719bSwdenk boot, thus flooding the BOOTP server. Defining 2009c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 2010c609719bSwdenk inserted before sending out BOOTP requests. The 20116c33c785SWolfgang Denk following delays are inserted then: 2012c609719bSwdenk 2013c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 2014c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 2015c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 2016c609719bSwdenk 4th and following 2017c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 2018c609719bSwdenk 2019fe389a82Sstroese- DHCP Advanced Options: 20201fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 20211fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 2022fe389a82Sstroese 20231fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 20241fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 20251fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 20261fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 20271fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 20281fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 20291fe80d79SJon Loeliger CONFIG_BOOTP_DNS 20301fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 20311fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 20321fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 20331fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 20341fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 20352c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 2036fe389a82Sstroese 20375d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 20385d110f0aSWilson Callan environment variable, not the BOOTP server. 2039fe389a82Sstroese 20402c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 20412c00e099SJoe Hershberger after the configured retry count, the call will fail 20422c00e099SJoe Hershberger instead of starting over. This can be used to fail over 20432c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 20442c00e099SJoe Hershberger is not available. 20452c00e099SJoe Hershberger 2046fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 2047fe389a82Sstroese serverip from a DHCP server, it is possible that more 2048fe389a82Sstroese than one DNS serverip is offered to the client. 2049fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 2050fe389a82Sstroese serverip will be stored in the additional environment 2051fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 2052fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 20531fe80d79SJon Loeliger is defined. 2054fe389a82Sstroese 2055fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 2056fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 2057fe389a82Sstroese need the hostname of the DHCP requester. 20585d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 20591fe80d79SJon Loeliger of the "hostname" environment variable is passed as 20601fe80d79SJon Loeliger option 12 to the DHCP server. 2061fe389a82Sstroese 2062d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 2063d9a2f416SAras Vaichas 2064d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 2065d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 2066d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 2067d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 2068d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 2069d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 2070d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 2071d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 2072d9a2f416SAras Vaichas that one of the retries will be successful but note that 2073d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 2074d9a2f416SAras Vaichas this delay. 2075d9a2f416SAras Vaichas 2076d22c338eSJoe Hershberger - Link-local IP address negotiation: 2077d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 2078d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 2079d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 2080d22c338eSJoe Hershberger to exist in all environments that the device must operate. 2081d22c338eSJoe Hershberger 2082d22c338eSJoe Hershberger See doc/README.link-local for more information. 2083d22c338eSJoe Hershberger 2084a3d991bdSwdenk - CDP Options: 2085a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 2086a3d991bdSwdenk 2087a3d991bdSwdenk The device id used in CDP trigger frames. 2088a3d991bdSwdenk 2089a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 2090a3d991bdSwdenk 2091a3d991bdSwdenk A two character string which is prefixed to the MAC address 2092a3d991bdSwdenk of the device. 2093a3d991bdSwdenk 2094a3d991bdSwdenk CONFIG_CDP_PORT_ID 2095a3d991bdSwdenk 2096a3d991bdSwdenk A printf format string which contains the ascii name of 2097a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 209811ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 2099a3d991bdSwdenk 2100a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 2101a3d991bdSwdenk 2102a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 2103a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 2104a3d991bdSwdenk 2105a3d991bdSwdenk CONFIG_CDP_VERSION 2106a3d991bdSwdenk 2107a3d991bdSwdenk An ascii string containing the version of the software. 2108a3d991bdSwdenk 2109a3d991bdSwdenk CONFIG_CDP_PLATFORM 2110a3d991bdSwdenk 2111a3d991bdSwdenk An ascii string containing the name of the platform. 2112a3d991bdSwdenk 2113a3d991bdSwdenk CONFIG_CDP_TRIGGER 2114a3d991bdSwdenk 2115a3d991bdSwdenk A 32bit integer sent on the trigger. 2116a3d991bdSwdenk 2117a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 2118a3d991bdSwdenk 2119a3d991bdSwdenk A 16bit integer containing the power consumption of the 2120a3d991bdSwdenk device in .1 of milliwatts. 2121a3d991bdSwdenk 2122a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 2123a3d991bdSwdenk 2124a3d991bdSwdenk A byte containing the id of the VLAN. 2125a3d991bdSwdenk 2126c609719bSwdenk- Status LED: CONFIG_STATUS_LED 2127c609719bSwdenk 2128c609719bSwdenk Several configurations allow to display the current 2129c609719bSwdenk status using a LED. For instance, the LED will blink 2130c609719bSwdenk fast while running U-Boot code, stop blinking as 2131c609719bSwdenk soon as a reply to a BOOTP request was received, and 2132c609719bSwdenk start blinking slow once the Linux kernel is running 2133c609719bSwdenk (supported by a status LED driver in the Linux 2134c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 2135c609719bSwdenk feature in U-Boot. 2136c609719bSwdenk 21371df7bbbaSIgor Grinberg Additional options: 21381df7bbbaSIgor Grinberg 21391df7bbbaSIgor Grinberg CONFIG_GPIO_LED 21401df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 21411df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 21421df7bbbaSIgor Grinberg status LED backend implementation. Define CONFIG_GPIO_LED 21431df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 21441df7bbbaSIgor Grinberg 21459dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 21469dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 21479dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 21489dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 21499dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 21509dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 21519dfdcdfeSIgor Grinberg 2152c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 2153c609719bSwdenk 2154c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 2155c609719bSwdenk on those systems that support this (optional) 2156c609719bSwdenk feature, like the TQM8xxL modules. 2157c609719bSwdenk 21583f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 2159c609719bSwdenk 21603f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 21613f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 21623f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 21633f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 21643f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 21653f4978c7SHeiko Schocher interface. 21663f4978c7SHeiko Schocher 21673f4978c7SHeiko Schocher ported i2c driver to the new framework: 2168ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 2169ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 2170ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 2171ea818dbbSHeiko Schocher for defining speed and slave address 2172ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 2173ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 2174ea818dbbSHeiko Schocher for defining speed and slave address 2175ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 2176ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 2177ea818dbbSHeiko Schocher for defining speed and slave address 2178ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 2179ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 2180ea818dbbSHeiko Schocher for defining speed and slave address 21813f4978c7SHeiko Schocher 218200f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 218300f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 218400f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 218500f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 218600f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 218700f792e0SHeiko Schocher bus. 218800f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 218900f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 219000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 219100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 219200f792e0SHeiko Schocher second bus. 219300f792e0SHeiko Schocher 21941f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 21951f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 21961f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 21971f2ba722SSimon Glass 100000 and the slave addr 0! 21981f2ba722SSimon Glass 2199880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 2200880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 2201880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 2202880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 2203880540deSDirk Eibach 2204fac96408Strem - drivers/i2c/i2c_mxc.c 2205fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 2206fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 2207fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 2208fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 2209fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 2210fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 2211fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 2212fac96408Strem If thoses defines are not set, default value is 100000 2213fac96408Strem for speed, and 0 for slave. 2214fac96408Strem 22151086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 22161086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 22171086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 22181086bfa9SNobuhiro Iwamatsu 22191086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 22201086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 22211086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 22221086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 22231086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 22241086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 22251086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 22261086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 22271086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 22281086bfa9SNobuhiro Iwamatsu 22292035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 22302035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 22312035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 22322035d77dSNobuhiro Iwamatsu 22332035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 22342035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 22352035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 22362035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 22372035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 22382035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 22392035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 22402035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 22412035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 22422035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 22432035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 22442035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 22452035d77dSNobuhiro Iwamatsu - CONFIF_SYS_I2C_SH_NUM_CONTROLLERS for nummber of i2c buses 22462035d77dSNobuhiro Iwamatsu 22476789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 22486789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 22496789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 22506789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 22516789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 22526789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 22536789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 22546789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 22556789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 22566789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 22576789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 22586789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 22596789e84eSHeiko Schocher 22600bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 22610bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 22620bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 22630bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 22640bdffe71SHeiko Schocher 2265e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 2266e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 2267e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 2268e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 2269e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 2270e717fc6dSNaveen Krishna Ch 22713f4978c7SHeiko Schocher additional defines: 22723f4978c7SHeiko Schocher 22733f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 22743f4978c7SHeiko Schocher Hold the number of i2c busses you want to use. If you 22753f4978c7SHeiko Schocher don't use/have i2c muxes on your i2c bus, this 22763f4978c7SHeiko Schocher is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can 22773f4978c7SHeiko Schocher omit this define. 22783f4978c7SHeiko Schocher 22793f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 22803f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 22813f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 22823f4978c7SHeiko Schocher omit this define. 22833f4978c7SHeiko Schocher 22843f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 22853f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 22863f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 22873f4978c7SHeiko Schocher define. 22883f4978c7SHeiko Schocher 22893f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 22903f4978c7SHeiko Schocher hold a list of busses you want to use, only used if 22913f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 22923f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 22933f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 22943f4978c7SHeiko Schocher 22953f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 22963f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 22973f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 22983f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 22993f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 23003f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 23013f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 23023f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 23033f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 23043f4978c7SHeiko Schocher } 23053f4978c7SHeiko Schocher 23063f4978c7SHeiko Schocher which defines 23073f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 2308ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 2309ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 2310ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 2311ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 2312ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 23133f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 2314ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 2315ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 23163f4978c7SHeiko Schocher 23173f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 23183f4978c7SHeiko Schocher 2319ea818dbbSHeiko Schocher- Legacy I2C Support: CONFIG_HARD_I2C 23203f4978c7SHeiko Schocher 23213f4978c7SHeiko Schocher NOTE: It is intended to move drivers to CONFIG_SYS_I2C which 23223f4978c7SHeiko Schocher provides the following compelling advantages: 23233f4978c7SHeiko Schocher 23243f4978c7SHeiko Schocher - more than one i2c adapter is usable 23253f4978c7SHeiko Schocher - approved multibus support 23263f4978c7SHeiko Schocher - better i2c mux support 23273f4978c7SHeiko Schocher 23283f4978c7SHeiko Schocher ** Please consider updating your I2C driver now. ** 23293f4978c7SHeiko Schocher 2330ea818dbbSHeiko Schocher These enable legacy I2C serial bus commands. Defining 2331ea818dbbSHeiko Schocher CONFIG_HARD_I2C will include the appropriate I2C driver 2332ea818dbbSHeiko Schocher for the selected CPU. 2333c609719bSwdenk 2334b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 2335602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 2336b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 2337b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 2338c609719bSwdenk command line interface. 2339c609719bSwdenk 2340bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 2341c609719bSwdenk 2342b37c7e5eSwdenk There are several other quantities that must also be 2343ea818dbbSHeiko Schocher defined when you define CONFIG_HARD_I2C. 2344c609719bSwdenk 23456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 2346b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 23476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 234811ccc33fSMarcel Ziswiler the CPU's i2c node address). 2349c609719bSwdenk 23508d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 2351a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 23528d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 23538d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 23548d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 2355b37c7e5eSwdenk 23565da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 23575da71efaSEric Millbrandt 23585da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 23595da71efaSEric Millbrandt chips might think that the current transfer is still 23605da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 23615da71efaSEric Millbrandt commands until the slave device responds. 23625da71efaSEric Millbrandt 2363b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 2364b37c7e5eSwdenk 2365ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 2366b37c7e5eSwdenk then the following macros need to be defined (examples are 2367b37c7e5eSwdenk from include/configs/lwmon.h): 2368c609719bSwdenk 2369c609719bSwdenk I2C_INIT 2370c609719bSwdenk 2371b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 2372c609719bSwdenk controller or configure ports. 2373c609719bSwdenk 2374b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 2375b37c7e5eSwdenk 2376c609719bSwdenk I2C_PORT 2377c609719bSwdenk 2378c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 2379c609719bSwdenk assumes both bits are on the same port). Valid values 2380c609719bSwdenk are 0..3 for ports A..D. 2381c609719bSwdenk 2382c609719bSwdenk I2C_ACTIVE 2383c609719bSwdenk 2384c609719bSwdenk The code necessary to make the I2C data line active 2385c609719bSwdenk (driven). If the data line is open collector, this 2386c609719bSwdenk define can be null. 2387c609719bSwdenk 2388b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 2389b37c7e5eSwdenk 2390c609719bSwdenk I2C_TRISTATE 2391c609719bSwdenk 2392c609719bSwdenk The code necessary to make the I2C data line tri-stated 2393c609719bSwdenk (inactive). If the data line is open collector, this 2394c609719bSwdenk define can be null. 2395c609719bSwdenk 2396b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 2397b37c7e5eSwdenk 2398c609719bSwdenk I2C_READ 2399c609719bSwdenk 2400472d5460SYork Sun Code that returns true if the I2C data line is high, 2401472d5460SYork Sun false if it is low. 2402c609719bSwdenk 2403b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 2404b37c7e5eSwdenk 2405c609719bSwdenk I2C_SDA(bit) 2406c609719bSwdenk 2407472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 2408472d5460SYork Sun is false, it clears it (low). 2409c609719bSwdenk 2410b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 2411b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 2412b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 2413b37c7e5eSwdenk 2414c609719bSwdenk I2C_SCL(bit) 2415c609719bSwdenk 2416472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 2417472d5460SYork Sun is false, it clears it (low). 2418c609719bSwdenk 2419b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 2420b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 2421b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 2422b37c7e5eSwdenk 2423c609719bSwdenk I2C_DELAY 2424c609719bSwdenk 2425c609719bSwdenk This delay is invoked four times per clock cycle so this 2426c609719bSwdenk controls the rate of data transfer. The data rate thus 2427b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 2428b37c7e5eSwdenk like: 2429b37c7e5eSwdenk 2430b37c7e5eSwdenk #define I2C_DELAY udelay(2) 2431c609719bSwdenk 2432793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 2433793b5726SMike Frysinger 2434793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 2435793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 2436793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 2437793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 2438793b5726SMike Frysinger 2439793b5726SMike Frysinger You should define these to the GPIO value as given directly to 2440793b5726SMike Frysinger the generic GPIO functions. 2441793b5726SMike Frysinger 24426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 244347cd00faSwdenk 244447cd00faSwdenk When a board is reset during an i2c bus transfer 244547cd00faSwdenk chips might think that the current transfer is still 244647cd00faSwdenk in progress. On some boards it is possible to access 244747cd00faSwdenk the i2c SCLK line directly, either by using the 244847cd00faSwdenk processor pin as a GPIO or by having a second pin 244947cd00faSwdenk connected to the bus. If this option is defined a 245047cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 245147cd00faSwdenk is run early in the boot sequence. 245247cd00faSwdenk 245326a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 245426a33504SRichard Retanubun 245526a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 245626a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 245726a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 245826a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 245926a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 246026a33504SRichard Retanubun controller provide such a method. It is called at the end of 246126a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 246226a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 246326a33504SRichard Retanubun 246417ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 246517ea1177Swdenk 246617ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 246717ea1177Swdenk in u-boot bd_info structure based on u-boot environment 246817ea1177Swdenk variable "i2cfast". (see also i2cfast) 246917ea1177Swdenk 2470bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 2471bb99ad6dSBen Warren 2472bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 2473bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 2474bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 2475bb99ad6dSBen Warren Note that bus numbering is zero-based. 2476bb99ad6dSBen Warren 24776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 2478bb99ad6dSBen Warren 2479bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 24800f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 24810f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 24820f89c54bSPeter Tyser a 1D array of device addresses 2483bb99ad6dSBen Warren 2484bb99ad6dSBen Warren e.g. 2485bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 24866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 2487bb99ad6dSBen Warren 2488bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 2489bb99ad6dSBen Warren 2490bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 24916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2492bb99ad6dSBen Warren 2493bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2494bb99ad6dSBen Warren 24956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2496be5e6181STimur Tabi 2497be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2498be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2499be5e6181STimur Tabi 25006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 25010dc018ecSStefan Roese 25020dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 25030dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 25040dc018ecSStefan Roese 25056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 25060dc018ecSStefan Roese 25070dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 25080dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 25090dc018ecSStefan Roese 25106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 25119ebbb54fSVictor Gallardo 25129ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 25139ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 25149ebbb54fSVictor Gallardo specified DTT device. 25159ebbb54fSVictor Gallardo 25162ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 25172ac6985aSAndrew Dyer 25182ac6985aSAndrew Dyer defining this will force the i2c_read() function in 25192ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 25202ac6985aSAndrew Dyer between writing the address pointer and reading the 25212ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 25222ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 25232ac6985aSAndrew Dyer devices can use either method, but some require one or 25242ac6985aSAndrew Dyer the other. 2525be5e6181STimur Tabi 2526c609719bSwdenk- SPI Support: CONFIG_SPI 2527c609719bSwdenk 2528c609719bSwdenk Enables SPI driver (so far only tested with 2529c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2530c609719bSwdenk D/As on the SACSng board) 2531c609719bSwdenk 25326639562eSYoshihiro Shimoda CONFIG_SH_SPI 25336639562eSYoshihiro Shimoda 25346639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 25356639562eSYoshihiro Shimoda only SH7757 is supported. 25366639562eSYoshihiro Shimoda 2537c609719bSwdenk CONFIG_SPI_X 2538c609719bSwdenk 2539c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2540c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2541c609719bSwdenk 2542c609719bSwdenk CONFIG_SOFT_SPI 2543c609719bSwdenk 2544c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2545c609719bSwdenk using hardware support. This is a general purpose 2546c609719bSwdenk driver that only requires three general I/O port pins 2547c609719bSwdenk (two outputs, one input) to function. If this is 2548c609719bSwdenk defined, the board configuration must define several 2549c609719bSwdenk SPI configuration items (port pins to use, etc). For 2550c609719bSwdenk an example, see include/configs/sacsng.h. 2551c609719bSwdenk 255204a9e118SBen Warren CONFIG_HARD_SPI 255304a9e118SBen Warren 255404a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 255504a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 255604a9e118SBen Warren must define a list of chip-select function pointers. 255704a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 255804a9e118SBen Warren example, see include/configs/mpc8349emds.h. 255904a9e118SBen Warren 256038254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 256138254f45SGuennadi Liakhovetski 256238254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 25632e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 256438254f45SGuennadi Liakhovetski 25650133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 25660133502eSMatthias Fuchs 25670133502eSMatthias Fuchs Enables FPGA subsystem. 25680133502eSMatthias Fuchs 25690133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 25700133502eSMatthias Fuchs 25710133502eSMatthias Fuchs Enables support for specific chip vendors. 25720133502eSMatthias Fuchs (ALTERA, XILINX) 25730133502eSMatthias Fuchs 25740133502eSMatthias Fuchs CONFIG_FPGA_<family> 25750133502eSMatthias Fuchs 25760133502eSMatthias Fuchs Enables support for FPGA family. 25770133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 25780133502eSMatthias Fuchs 25790133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2580c609719bSwdenk 2581c609719bSwdenk Specify the number of FPGA devices to support. 2582c609719bSwdenk 258364e809afSSiva Durga Prasad Paladugu CONFIG_CMD_FPGA_LOADMK 258464e809afSSiva Durga Prasad Paladugu 258564e809afSSiva Durga Prasad Paladugu Enable support for fpga loadmk command 258664e809afSSiva Durga Prasad Paladugu 258767193864SMichal Simek CONFIG_CMD_FPGA_LOADP 258867193864SMichal Simek 258967193864SMichal Simek Enable support for fpga loadp command - load partial bitstream 259067193864SMichal Simek 259167193864SMichal Simek CONFIG_CMD_FPGA_LOADBP 259267193864SMichal Simek 259367193864SMichal Simek Enable support for fpga loadbp command - load partial bitstream 259467193864SMichal Simek (Xilinx only) 259567193864SMichal Simek 25966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2597c609719bSwdenk 2598c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2599c609719bSwdenk 26006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2601c609719bSwdenk 2602c609719bSwdenk Enable checks on FPGA configuration interface busy 2603c609719bSwdenk status by the configuration function. This option 2604c609719bSwdenk will require a board or device specific function to 2605c609719bSwdenk be written. 2606c609719bSwdenk 2607c609719bSwdenk CONFIG_FPGA_DELAY 2608c609719bSwdenk 2609c609719bSwdenk If defined, a function that provides delays in the FPGA 2610c609719bSwdenk configuration driver. 2611c609719bSwdenk 26126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2613c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2614c609719bSwdenk 26156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2616c609719bSwdenk 2617c609719bSwdenk Check for configuration errors during FPGA bitfile 2618c609719bSwdenk loading. For example, abort during Virtex II 2619c609719bSwdenk configuration if the INIT_B line goes low (which 2620c609719bSwdenk indicated a CRC error). 2621c609719bSwdenk 26226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2623c609719bSwdenk 2624c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2625c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2626c609719bSwdenk FPGA configuration sequence. The default time is 500 262711ccc33fSMarcel Ziswiler ms. 2628c609719bSwdenk 26296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2630c609719bSwdenk 2631c609719bSwdenk Maximum time to wait for BUSY to deassert during 263211ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2633c609719bSwdenk 26346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2635c609719bSwdenk 2636c609719bSwdenk Time to wait after FPGA configuration. The default is 263711ccc33fSMarcel Ziswiler 200 ms. 2638c609719bSwdenk 2639c609719bSwdenk- Configuration Management: 2640c609719bSwdenk CONFIG_IDENT_STRING 2641c609719bSwdenk 2642c609719bSwdenk If defined, this string will be added to the U-Boot 2643c609719bSwdenk version information (U_BOOT_VERSION) 2644c609719bSwdenk 2645c609719bSwdenk- Vendor Parameter Protection: 2646c609719bSwdenk 2647c609719bSwdenk U-Boot considers the values of the environment 2648c609719bSwdenk variables "serial#" (Board Serial Number) and 26497152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2650c609719bSwdenk are set once by the board vendor / manufacturer, and 2651c609719bSwdenk protects these variables from casual modification by 2652c609719bSwdenk the user. Once set, these variables are read-only, 2653c609719bSwdenk and write or delete attempts are rejected. You can 265411ccc33fSMarcel Ziswiler change this behaviour: 2655c609719bSwdenk 2656c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2657c609719bSwdenk file, the write protection for vendor parameters is 265847cd00faSwdenk completely disabled. Anybody can change or delete 2659c609719bSwdenk these parameters. 2660c609719bSwdenk 2661c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2662c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 266311ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2664c609719bSwdenk which can be changed exactly ONCE by the user. [The 2665c609719bSwdenk serial# is unaffected by this, i. e. it remains 2666c609719bSwdenk read-only.] 2667c609719bSwdenk 26682598090bSJoe Hershberger The same can be accomplished in a more flexible way 26692598090bSJoe Hershberger for any variable by configuring the type of access 26702598090bSJoe Hershberger to allow for those variables in the ".flags" variable 26712598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 26722598090bSJoe Hershberger 2673c609719bSwdenk- Protected RAM: 2674c609719bSwdenk CONFIG_PRAM 2675c609719bSwdenk 2676c609719bSwdenk Define this variable to enable the reservation of 2677c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2678c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2679c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2680c609719bSwdenk this default value by defining an environment 2681c609719bSwdenk variable "pram" to the number of kB you want to 2682c609719bSwdenk reserve. Note that the board info structure will 2683c609719bSwdenk still show the full amount of RAM. If pRAM is 2684c609719bSwdenk reserved, a new environment variable "mem" will 2685c609719bSwdenk automatically be defined to hold the amount of 2686c609719bSwdenk remaining RAM in a form that can be passed as boot 2687c609719bSwdenk argument to Linux, for instance like that: 2688c609719bSwdenk 2689fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2690c609719bSwdenk saveenv 2691c609719bSwdenk 2692c609719bSwdenk This way you can tell Linux not to use this memory, 2693c609719bSwdenk either, which results in a memory region that will 2694c609719bSwdenk not be affected by reboots. 2695c609719bSwdenk 2696c609719bSwdenk *WARNING* If your board configuration uses automatic 2697c609719bSwdenk detection of the RAM size, you must make sure that 2698c609719bSwdenk this memory test is non-destructive. So far, the 2699c609719bSwdenk following board configurations are known to be 2700c609719bSwdenk "pRAM-clean": 2701c609719bSwdenk 27021b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 27031b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2704544d97e9SWolfgang Denk FLAGADM, TQM8260 2705c609719bSwdenk 270640fef049SGabe Black- Access to physical memory region (> 4GB) 270740fef049SGabe Black Some basic support is provided for operations on memory not 270840fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 270940fef049SGabe Black support access to more than 4GB of memory on 32-bit 271040fef049SGabe Black machines using physical address extension or similar. 271140fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 271240fef049SGabe Black currently only supports clearing the memory. 271340fef049SGabe Black 2714c609719bSwdenk- Error Recovery: 2715c609719bSwdenk CONFIG_PANIC_HANG 2716c609719bSwdenk 2717c609719bSwdenk Define this variable to stop the system in case of a 2718c609719bSwdenk fatal error, so that you have to reset it manually. 2719c609719bSwdenk This is probably NOT a good idea for an embedded 272011ccc33fSMarcel Ziswiler system where you want the system to reboot 2721c609719bSwdenk automatically as fast as possible, but it may be 2722c609719bSwdenk useful during development since you can try to debug 2723c609719bSwdenk the conditions that lead to the situation. 2724c609719bSwdenk 2725c609719bSwdenk CONFIG_NET_RETRY_COUNT 2726c609719bSwdenk 2727c609719bSwdenk This variable defines the number of retries for 2728c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2729c609719bSwdenk before giving up the operation. If not defined, a 2730c609719bSwdenk default value of 5 is used. 2731c609719bSwdenk 273240cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 273340cb90eeSGuennadi Liakhovetski 273440cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 273540cb90eeSGuennadi Liakhovetski 273648a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 273748a3e999STetsuyuki Kobayashi 273848a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 273948a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 274048a3e999STetsuyuki Kobayashi try longer timeout such as 274148a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 274248a3e999STetsuyuki Kobayashi 2743c609719bSwdenk- Command Interpreter: 27448078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 274504a85b3bSwdenk 274604a85b3bSwdenk Enable auto completion of commands using TAB. 274704a85b3bSwdenk 27488078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 27498078f1a5SWolfgang Denk for the "hush" shell. 27508078f1a5SWolfgang Denk 27518078f1a5SWolfgang Denk 27526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2753c609719bSwdenk 2754c609719bSwdenk Define this variable to enable the "hush" shell (from 2755c609719bSwdenk Busybox) as command line interpreter, thus enabling 2756c609719bSwdenk powerful command line syntax like 2757c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2758c609719bSwdenk constructs ("shell scripts"). 2759c609719bSwdenk 2760c609719bSwdenk If undefined, you get the old, much simpler behaviour 2761c609719bSwdenk with a somewhat smaller memory footprint. 2762c609719bSwdenk 2763c609719bSwdenk 27646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2765c609719bSwdenk 2766c609719bSwdenk This defines the secondary prompt string, which is 2767c609719bSwdenk printed when the command interpreter needs more input 2768c609719bSwdenk to complete a command. Usually "> ". 2769c609719bSwdenk 2770c609719bSwdenk Note: 2771c609719bSwdenk 2772c609719bSwdenk In the current implementation, the local variables 2773c609719bSwdenk space and global environment variables space are 2774c609719bSwdenk separated. Local variables are those you define by 27753b57fe0aSwdenk simply typing `name=value'. To access a local 2776c609719bSwdenk variable later on, you have write `$name' or 27773b57fe0aSwdenk `${name}'; to execute the contents of a variable 27783b57fe0aSwdenk directly type `$name' at the command prompt. 2779c609719bSwdenk 2780c609719bSwdenk Global environment variables are those you use 2781c609719bSwdenk setenv/printenv to work with. To run a command stored 2782c609719bSwdenk in such a variable, you need to use the run command, 2783c609719bSwdenk and you must not use the '$' sign to access them. 2784c609719bSwdenk 2785c609719bSwdenk To store commands and special characters in a 2786c609719bSwdenk variable, please use double quotation marks 2787c609719bSwdenk surrounding the whole text of the variable, instead 2788c609719bSwdenk of the backslashes before semicolons and special 2789c609719bSwdenk symbols. 2790c609719bSwdenk 2791aa0c71acSWolfgang Denk- Commandline Editing and History: 2792aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2793aa0c71acSWolfgang Denk 279411ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2795aa0c71acSWolfgang Denk commandline input operations 2796aa0c71acSWolfgang Denk 2797a8c7c708Swdenk- Default Environment: 2798c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2799c609719bSwdenk 2800c609719bSwdenk Define this to contain any number of null terminated 2801c609719bSwdenk strings (variable = value pairs) that will be part of 28027152b1d0Swdenk the default environment compiled into the boot image. 28032262cfeeSwdenk 2804c609719bSwdenk For example, place something like this in your 2805c609719bSwdenk board's config file: 2806c609719bSwdenk 2807c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2808c609719bSwdenk "myvar1=value1\0" \ 2809c609719bSwdenk "myvar2=value2\0" 2810c609719bSwdenk 2811c609719bSwdenk Warning: This method is based on knowledge about the 2812c609719bSwdenk internal format how the environment is stored by the 28132262cfeeSwdenk U-Boot code. This is NOT an official, exported 2814c609719bSwdenk interface! Although it is unlikely that this format 28157152b1d0Swdenk will change soon, there is no guarantee either. 2816c609719bSwdenk You better know what you are doing here. 2817c609719bSwdenk 2818c609719bSwdenk Note: overly (ab)use of the default environment is 2819c609719bSwdenk discouraged. Make sure to check other ways to preset 282074de7aefSWolfgang Denk the environment like the "source" command or the 2821c609719bSwdenk boot command first. 2822c609719bSwdenk 28235e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 28245e724ca2SStephen Warren 28255e724ca2SStephen Warren Define this in order to add variables describing the 28265e724ca2SStephen Warren U-Boot build configuration to the default environment. 28275e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 28285e724ca2SStephen Warren 28295e724ca2SStephen Warren Enabling this option will cause the following to be defined: 28305e724ca2SStephen Warren 28315e724ca2SStephen Warren - CONFIG_SYS_ARCH 28325e724ca2SStephen Warren - CONFIG_SYS_CPU 28335e724ca2SStephen Warren - CONFIG_SYS_BOARD 28345e724ca2SStephen Warren - CONFIG_SYS_VENDOR 28355e724ca2SStephen Warren - CONFIG_SYS_SOC 28365e724ca2SStephen Warren 28377e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 28387e27f89fSTom Rini 28397e27f89fSTom Rini Define this in order to add variables describing certain 28407e27f89fSTom Rini run-time determined information about the hardware to the 28417e27f89fSTom Rini environment. These will be named board_name, board_rev. 28427e27f89fSTom Rini 284306fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 284406fd8538SSimon Glass 284506fd8538SSimon Glass Normally the environment is loaded when the board is 284606fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 284706fd8538SSimon Glass that so that the environment is not available until 284806fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 284906fd8538SSimon Glass this is instead controlled by the value of 285006fd8538SSimon Glass /config/load-environment. 285106fd8538SSimon Glass 2852a8c7c708Swdenk- DataFlash Support: 28532abbe075Swdenk CONFIG_HAS_DATAFLASH 28542abbe075Swdenk 28552abbe075Swdenk Defining this option enables DataFlash features and 28562abbe075Swdenk allows to read/write in Dataflash via the standard 28572abbe075Swdenk commands cp, md... 28582abbe075Swdenk 2859f61ec45eSEric Nelson- Serial Flash support 2860f61ec45eSEric Nelson CONFIG_CMD_SF 2861f61ec45eSEric Nelson 2862f61ec45eSEric Nelson Defining this option enables SPI flash commands 2863f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2864f61ec45eSEric Nelson 2865f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2866f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2867f61ec45eSEric Nelson commands. 2868f61ec45eSEric Nelson 2869f61ec45eSEric Nelson The following defaults may be provided by the platform 2870f61ec45eSEric Nelson to handle the common case when only a single serial 2871f61ec45eSEric Nelson flash is present on the system. 2872f61ec45eSEric Nelson 2873f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2874f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2875f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2876f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2877f61ec45eSEric Nelson 287824007273SSimon Glass CONFIG_CMD_SF_TEST 287924007273SSimon Glass 288024007273SSimon Glass Define this option to include a destructive SPI flash 288124007273SSimon Glass test ('sf test'). 288224007273SSimon Glass 28831dcd6d03SJagannadha Sutradharudu Teki CONFIG_SPI_FLASH_BAR Ban/Extended Addr Reg 28841dcd6d03SJagannadha Sutradharudu Teki 28851dcd6d03SJagannadha Sutradharudu Teki Define this option to use the Bank addr/Extended addr 28861dcd6d03SJagannadha Sutradharudu Teki support on SPI flashes which has size > 16Mbytes. 28871dcd6d03SJagannadha Sutradharudu Teki 2888b902e07cSJagannadha Sutradharudu Teki CONFIG_SF_DUAL_FLASH Dual flash memories 2889b902e07cSJagannadha Sutradharudu Teki 2890b902e07cSJagannadha Sutradharudu Teki Define this option to use dual flash support where two flash 2891b902e07cSJagannadha Sutradharudu Teki memories can be connected with a given cs line. 2892b902e07cSJagannadha Sutradharudu Teki currently Xilinx Zynq qspi support these type of connections. 2893b902e07cSJagannadha Sutradharudu Teki 28943f85ce27Swdenk- SystemACE Support: 28953f85ce27Swdenk CONFIG_SYSTEMACE 28963f85ce27Swdenk 28973f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 28983f85ce27Swdenk chips attached via some sort of local bus. The address 289911ccc33fSMarcel Ziswiler of the chip must also be defined in the 29006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 29013f85ce27Swdenk 29023f85ce27Swdenk #define CONFIG_SYSTEMACE 29036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 29043f85ce27Swdenk 29053f85ce27Swdenk When SystemACE support is added, the "ace" device type 29063f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 29073f85ce27Swdenk 2908ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2909ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2910ecb0ccd9SWolfgang Denk 291128cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2912ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 291328cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2914ecb0ccd9SWolfgang Denk number generator is used. 2915ecb0ccd9SWolfgang Denk 291628cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 291728cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 291828cb9375SWolfgang Denk defined, the normal port 69 is used. 291928cb9375SWolfgang Denk 292028cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2921ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2922ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2923ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2924ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2925ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2926ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2927ecb0ccd9SWolfgang Denk 2928bf36c5d5SSimon Glass- Hashing support: 2929bf36c5d5SSimon Glass CONFIG_CMD_HASH 2930bf36c5d5SSimon Glass 2931bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2932bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2933bf36c5d5SSimon Glass 2934bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2935bf36c5d5SSimon Glass 2936bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2937bf36c5d5SSimon Glass size a little. 2938bf36c5d5SSimon Glass 2939bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2940bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2941bf36c5d5SSimon Glass 2942bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2943bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2944bf36c5d5SSimon Glass 2945a11f1873SRobert Winkler- Freescale i.MX specific commands: 2946a11f1873SRobert Winkler CONFIG_CMD_HDMIDETECT 2947a11f1873SRobert Winkler This enables 'hdmidet' command which returns true if an 2948a11f1873SRobert Winkler HDMI monitor is detected. This command is i.MX 6 specific. 2949a11f1873SRobert Winkler 2950a11f1873SRobert Winkler CONFIG_CMD_BMODE 2951a11f1873SRobert Winkler This enables the 'bmode' (bootmode) command for forcing 2952a11f1873SRobert Winkler a boot from specific media. 2953a11f1873SRobert Winkler 2954a11f1873SRobert Winkler This is useful for forcing the ROM's usb downloader to 2955a11f1873SRobert Winkler activate upon a watchdog reset which is nice when iterating 2956a11f1873SRobert Winkler on U-Boot. Using the reset button or running bmode normal 2957a11f1873SRobert Winkler will set it back to normal. This command currently 2958a11f1873SRobert Winkler supports i.MX53 and i.MX6. 2959a11f1873SRobert Winkler 296019c402afSSimon Glass- Signing support: 296119c402afSSimon Glass CONFIG_RSA 296219c402afSSimon Glass 296319c402afSSimon Glass This enables the RSA algorithm used for FIT image verification 29648bf2aad7SDetlev Zundel in U-Boot. See doc/uImage.FIT/signature.txt for more information. 296519c402afSSimon Glass 296619c402afSSimon Glass The signing part is build into mkimage regardless of this 296719c402afSSimon Glass option. 296819c402afSSimon Glass 29699e50c406SHeiko Schocher- bootcount support: 29709e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 29719e50c406SHeiko Schocher 29729e50c406SHeiko Schocher This enables the bootcounter support, see: 29739e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 29749e50c406SHeiko Schocher 29759e50c406SHeiko Schocher CONFIG_AT91SAM9XE 29769e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 29779e50c406SHeiko Schocher CONFIG_BLACKFIN 29789e50c406SHeiko Schocher enable special bootcounter support on blackfin based boards. 29799e50c406SHeiko Schocher CONFIG_SOC_DA8XX 29809e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 29819e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 29829e50c406SHeiko Schocher enable support for the bootcounter in RAM 29839e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 29849e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 29859e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 29869e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 29879e50c406SHeiko Schocher the bootcounter. 29889e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 298919c402afSSimon Glass 2990a8c7c708Swdenk- Show boot progress: 2991c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2992c609719bSwdenk 2993c609719bSwdenk Defining this option allows to add some board- 2994c609719bSwdenk specific code (calling a user-provided function 2995c609719bSwdenk "show_boot_progress(int)") that enables you to show 2996c609719bSwdenk the system's boot progress on some display (for 2997c609719bSwdenk example, some LED's) on your board. At the moment, 2998c609719bSwdenk the following checkpoints are implemented: 2999c609719bSwdenk 30003a608ca0SSimon Glass- Detailed boot stage timing 30013a608ca0SSimon Glass CONFIG_BOOTSTAGE 30023a608ca0SSimon Glass Define this option to get detailed timing of each stage 30033a608ca0SSimon Glass of the boot process. 30043a608ca0SSimon Glass 30053a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 30063a608ca0SSimon Glass This is the number of available user bootstage records. 30073a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 30083a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 30093a608ca0SSimon Glass the limit, recording will stop. 30103a608ca0SSimon Glass 30113a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 30123a608ca0SSimon Glass Define this to print a report before boot, similar to this: 30133a608ca0SSimon Glass 30143a608ca0SSimon Glass Timer summary in microseconds: 30153a608ca0SSimon Glass Mark Elapsed Stage 30163a608ca0SSimon Glass 0 0 reset 30173a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 30183a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 30193a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 30203a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 30213a608ca0SSimon Glass 3,910,375 250,777 main_loop 30223a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 30233a608ca0SSimon Glass 30,361,327 445,160 start_kernel 30243a608ca0SSimon Glass 30252eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 30262eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 30272eba38cfSSimon Glass and un/stashing of bootstage data. 30282eba38cfSSimon Glass 302994fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 303094fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 303194fd1316SSimon Glass node is created with each bootstage id as a child. Each child 303294fd1316SSimon Glass has a 'name' property and either 'mark' containing the 303394fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 303494fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 303594fd1316SSimon Glass For example: 303694fd1316SSimon Glass 303794fd1316SSimon Glass bootstage { 303894fd1316SSimon Glass 154 { 303994fd1316SSimon Glass name = "board_init_f"; 304094fd1316SSimon Glass mark = <3575678>; 304194fd1316SSimon Glass }; 304294fd1316SSimon Glass 170 { 304394fd1316SSimon Glass name = "lcd"; 304494fd1316SSimon Glass accum = <33482>; 304594fd1316SSimon Glass }; 304694fd1316SSimon Glass }; 304794fd1316SSimon Glass 304894fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 304994fd1316SSimon Glass 30501372cce2SMarian BalakowiczLegacy uImage format: 30511372cce2SMarian Balakowicz 3052c609719bSwdenk Arg Where When 3053c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 3054c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 3055c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 3056c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 3057c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 3058c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 3059c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 3060c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 3061c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 30621372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 3063c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 3064c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 3065c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 3066c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 30671372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 3068c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 30691372cce2SMarian Balakowicz 30701372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 30711372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 30721372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 30731372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 30741372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 30751372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 30761372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 307711ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 30781372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 30791372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 30801372cce2SMarian Balakowicz 3081ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 3082c609719bSwdenk 3083a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 308463e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 308563e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 308663e73c9aSwdenk 3087566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 3088566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 3089566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 3090566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 3091566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 3092566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 3093566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 3094566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 3095566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 3096566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 3097566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 3098566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 3099566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 3100566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 3101566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 3102566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 3103566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 3104566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 3105566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 3106566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 3107566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 3108566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 3109566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 3110566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 3111566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 3112566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 3113566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 3114566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 3115566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 3116566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 3117566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 3118566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 3119566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 3120566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 3121566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 3122566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 3123566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 3124566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 3125566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 3126566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 3127566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 3128566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 3129566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 3130566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 3131566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 3132566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 3133566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 3134c609719bSwdenk 3135566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 3136c609719bSwdenk 3137566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 3138566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 3139566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 3140206c60cbSwdenk 3141566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 3142566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 314311ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 3144566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 3145566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 3146566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 314774de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 314874de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 3149566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 3150c609719bSwdenk 31511372cce2SMarian BalakowiczFIT uImage format: 31521372cce2SMarian Balakowicz 31531372cce2SMarian Balakowicz Arg Where When 31541372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 31551372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 31561372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 31571372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 31581372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 31591372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 3160f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 31611372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 31621372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 31631372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 31641372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 31651372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 316611ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 316711ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 31681372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 31691372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 31701372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 31711372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 31721372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 31731372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 31741372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 31751372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 31761372cce2SMarian Balakowicz 31771372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 31781372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 31791372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 318011ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 31811372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 31821372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 31831372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 31841372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 31851372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 31861372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 31871372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 31881372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 31891372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 31901372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 31911372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 31921372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 31931372cce2SMarian Balakowicz 319411ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 31951372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 31961372cce2SMarian Balakowicz 319711ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 31981372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 31991372cce2SMarian Balakowicz 320011ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 32011372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 32021372cce2SMarian Balakowicz 3203*21d29f7fSHeiko Schocher- legacy image format: 3204*21d29f7fSHeiko Schocher CONFIG_IMAGE_FORMAT_LEGACY 3205*21d29f7fSHeiko Schocher enables the legacy image format support in U-Boot. 3206*21d29f7fSHeiko Schocher 3207*21d29f7fSHeiko Schocher Default: 3208*21d29f7fSHeiko Schocher enabled if CONFIG_FIT_SIGNATURE is not defined. 3209*21d29f7fSHeiko Schocher 3210*21d29f7fSHeiko Schocher CONFIG_DISABLE_IMAGE_LEGACY 3211*21d29f7fSHeiko Schocher disable the legacy image format 3212*21d29f7fSHeiko Schocher 3213*21d29f7fSHeiko Schocher This define is introduced, as the legacy image format is 3214*21d29f7fSHeiko Schocher enabled per default for backward compatibility. 3215*21d29f7fSHeiko Schocher 3216d95f6ec7SGabe Black- FIT image support: 3217d95f6ec7SGabe Black CONFIG_FIT 3218d95f6ec7SGabe Black Enable support for the FIT uImage format. 3219d95f6ec7SGabe Black 3220d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 3221d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 3222d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 3223d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 3224d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 3225d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 3226d95f6ec7SGabe Black 32273e569a6bSSimon Glass CONFIG_FIT_SIGNATURE 32283e569a6bSSimon Glass This option enables signature verification of FIT uImages, 32293e569a6bSSimon Glass using a hash signed and verified using RSA. See 32303e569a6bSSimon Glass doc/uImage.FIT/signature.txt for more details. 32313e569a6bSSimon Glass 3232*21d29f7fSHeiko Schocher WARNING: When relying on signed FIT images with required 3233*21d29f7fSHeiko Schocher signature check the legacy image format is default 3234*21d29f7fSHeiko Schocher disabled. If a board need legacy image format support 3235*21d29f7fSHeiko Schocher enable this through CONFIG_IMAGE_FORMAT_LEGACY 3236*21d29f7fSHeiko Schocher 32374cf2609bSWolfgang Denk- Standalone program support: 32384cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 32394cf2609bSWolfgang Denk 32406feff899SWolfgang Denk This option defines a board specific value for the 32416feff899SWolfgang Denk address where standalone program gets loaded, thus 32426feff899SWolfgang Denk overwriting the architecture dependent default 32434cf2609bSWolfgang Denk settings. 32444cf2609bSWolfgang Denk 32454cf2609bSWolfgang Denk- Frame Buffer Address: 32464cf2609bSWolfgang Denk CONFIG_FB_ADDR 32474cf2609bSWolfgang Denk 32484cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 324944a53b57SWolfgang Denk address for frame buffer. This is typically the case 325044a53b57SWolfgang Denk when using a graphics controller has separate video 325144a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 325244a53b57SWolfgang Denk the given address instead of dynamically reserving it 325344a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 325444a53b57SWolfgang Denk the memory for the frame buffer depending on the 325544a53b57SWolfgang Denk configured panel size. 32564cf2609bSWolfgang Denk 32574cf2609bSWolfgang Denk Please see board_init_f function. 32584cf2609bSWolfgang Denk 3259cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 3260cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 3261cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 3262cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 3263cccfc2abSDetlev Zundel 3264cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 3265cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 3266cccfc2abSDetlev Zundel 3267cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 3268cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 3269cccfc2abSDetlev Zundel 3270cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 3271cccfc2abSDetlev Zundel Needed for mtdparts command support. 3272cccfc2abSDetlev Zundel 3273cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 3274cccfc2abSDetlev Zundel 3275cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 3276cccfc2abSDetlev Zundel kernel. Needed for UBI support. 3277cccfc2abSDetlev Zundel 327870c219cdSJoe Hershberger- UBI support 327970c219cdSJoe Hershberger CONFIG_CMD_UBI 328070c219cdSJoe Hershberger 328170c219cdSJoe Hershberger Adds commands for interacting with MTD partitions formatted 328270c219cdSJoe Hershberger with the UBI flash translation layer 328370c219cdSJoe Hershberger 328470c219cdSJoe Hershberger Requires also defining CONFIG_RBTREE 328570c219cdSJoe Hershberger 3286147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 3287147162daSJoe Hershberger 3288147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 3289147162daSJoe Hershberger warnings and errors enabled. 3290147162daSJoe Hershberger 329170c219cdSJoe Hershberger- UBIFS support 329270c219cdSJoe Hershberger CONFIG_CMD_UBIFS 329370c219cdSJoe Hershberger 329470c219cdSJoe Hershberger Adds commands for interacting with UBI volumes formatted as 329570c219cdSJoe Hershberger UBIFS. UBIFS is read-only in u-boot. 329670c219cdSJoe Hershberger 329770c219cdSJoe Hershberger Requires UBI support as well as CONFIG_LZO 329870c219cdSJoe Hershberger 3299147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 3300147162daSJoe Hershberger 3301147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 3302147162daSJoe Hershberger warnings and errors enabled. 3303147162daSJoe Hershberger 33046a11cf48SDaniel Schwierzeck- SPL framework 33056a11cf48SDaniel Schwierzeck CONFIG_SPL 33066a11cf48SDaniel Schwierzeck Enable building of SPL globally. 33076a11cf48SDaniel Schwierzeck 330895579793STom Rini CONFIG_SPL_LDSCRIPT 330995579793STom Rini LDSCRIPT for linking the SPL binary. 331095579793STom Rini 33116ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 33126ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 33136ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 33146ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 33158960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 33166ebc3461SAlbert ARIBAUD must not be both defined at the same time. 33176ebc3461SAlbert ARIBAUD 331895579793STom Rini CONFIG_SPL_MAX_SIZE 33196ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 33206ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 33216ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 33226ebc3461SAlbert ARIBAUD not exceed it. 332395579793STom Rini 33246a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 33256a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 33266a11cf48SDaniel Schwierzeck 332794a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 332894a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 332994a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 333094a45bb1SScott Wood 333195579793STom Rini CONFIG_SPL_BSS_START_ADDR 333295579793STom Rini Link address for the BSS within the SPL binary. 333395579793STom Rini 333495579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 33356ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 33366ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 33376ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 33388960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 33396ebc3461SAlbert ARIBAUD must not be both defined at the same time. 334095579793STom Rini 334195579793STom Rini CONFIG_SPL_STACK 334295579793STom Rini Adress of the start of the stack SPL will use 334395579793STom Rini 334494a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 334594a45bb1SScott Wood Adress of the start of the stack SPL will use after 334694a45bb1SScott Wood relocation. If unspecified, this is equal to 334794a45bb1SScott Wood CONFIG_SPL_STACK. 334894a45bb1SScott Wood 334995579793STom Rini CONFIG_SYS_SPL_MALLOC_START 335095579793STom Rini Starting address of the malloc pool used in SPL. 335195579793STom Rini 335295579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 335395579793STom Rini The size of the malloc pool used in SPL. 33546a11cf48SDaniel Schwierzeck 335547f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 335647f7bcaeSTom Rini Enable the SPL framework under common/. This framework 335747f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 335847f7bcaeSTom Rini NAND loading of the Linux Kernel. 335947f7bcaeSTom Rini 33609607faf2STom Rini CONFIG_SPL_OS_BOOT 33619607faf2STom Rini Enable booting directly to an OS from SPL. 33629607faf2STom Rini See also: doc/README.falcon 33639607faf2STom Rini 3364861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 3365861a86f4STom Rini For ARM, enable an optional function to print more information 3366861a86f4STom Rini about the running system. 3367861a86f4STom Rini 33684b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 33694b919725SScott Wood Arch init code should be built for a very small image 33704b919725SScott Wood 33716a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 33726a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 33736a11cf48SDaniel Schwierzeck 33746a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 33756a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 33766a11cf48SDaniel Schwierzeck 33776a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 33786a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 33796a11cf48SDaniel Schwierzeck 33806a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 33816a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 33826a11cf48SDaniel Schwierzeck 33836a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 33846a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 33856a11cf48SDaniel Schwierzeck 338695579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 338795579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 338895579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 338995579793STom Rini Address, size and partition on the MMC to load U-Boot from 339095579793STom Rini when the MMC is being used in raw mode. 339195579793STom Rini 33922b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 33932b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 33942b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 33952b75b0adSPeter Korsgaard 33962b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 33972b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 33982b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 33992b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 34002b75b0adSPeter Korsgaard (for falcon mode) 34012b75b0adSPeter Korsgaard 340295579793STom Rini CONFIG_SPL_FAT_SUPPORT 340395579793STom Rini Support for fs/fat/libfat.o in SPL binary 340495579793STom Rini 340595579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 340695579793STom Rini Filename to read to load U-Boot when reading from FAT 340795579793STom Rini 34087ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_KERNEL_NAME 34097ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 34107ad2cc79SPeter Korsgaard from FAT (for Falcon mode) 34117ad2cc79SPeter Korsgaard 34127ad2cc79SPeter Korsgaard CONFIG_SPL_FAT_LOAD_ARGS_NAME 34137ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 34147ad2cc79SPeter Korsgaard when reading from FAT (for Falcon mode) 34157ad2cc79SPeter Korsgaard 341606f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 341706f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 341806f60ae3SScott Wood start.S waits for the rest of the SPL to load before 341906f60ae3SScott Wood continuing (the hardware starts execution after just 342006f60ae3SScott Wood loading the first page rather than the full 4K). 342106f60ae3SScott Wood 3422651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 3423651fcf60SPrabhakar Kushwaha Avoid SPL relocation 3424651fcf60SPrabhakar Kushwaha 34256f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 34266f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 34276f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 34286f2f01b9SScott Wood 34296f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 34306f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 34316f2f01b9SScott Wood 34326f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 34336f2f01b9SScott Wood Include standard software ECC in the SPL 34346f2f01b9SScott Wood 343595579793STom Rini CONFIG_SPL_NAND_SIMPLE 34367d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 34377d4b7955SScott Wood expose the cmd_ctrl() interface. 343895579793STom Rini 34396dd3b566STom Rini CONFIG_SPL_MTD_SUPPORT 34406dd3b566STom Rini Support for the MTD subsystem within SPL. Useful for 34416dd3b566STom Rini environment on NAND support within SPL. 34426dd3b566STom Rini 3443bb0dc108SYing Zhang CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT 3444bb0dc108SYing Zhang Set for the SPL on PPC mpc8xxx targets, support for 34455614e71bSYork Sun drivers/ddr/fsl/libddr.o in SPL binary. 3446bb0dc108SYing Zhang 34477c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 34487c8eea59SYing Zhang Set for common ddr init with serial presence detect in 34497c8eea59SYing Zhang SPL binary. 34507c8eea59SYing Zhang 345195579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 345295579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 345395579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 345495579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 345595579793STom Rini CONFIG_SYS_NAND_ECCBYTES 345695579793STom Rini Defines the size and behavior of the NAND that SPL uses 34577d4b7955SScott Wood to read U-Boot 345895579793STom Rini 3459fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 3460fbe76ae4SPrabhakar Kushwaha Add support NAND boot 3461fbe76ae4SPrabhakar Kushwaha 346295579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 34637d4b7955SScott Wood Location in NAND to read U-Boot from 34647d4b7955SScott Wood 34657d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 34667d4b7955SScott Wood Location in memory to load U-Boot to 34677d4b7955SScott Wood 34687d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 34697d4b7955SScott Wood Size of image to load 347095579793STom Rini 347195579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 34727d4b7955SScott Wood Entry point in loaded image to jump to 347395579793STom Rini 347495579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 347595579793STom Rini Define this if you need to first read the OOB and then the 347695579793STom Rini data. This is used for example on davinci plattforms. 347795579793STom Rini 347895579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 347995579793STom Rini Support for an OMAP3-specific set of functions to return the 348095579793STom Rini ID and MFR of the first attached NAND chip, if present. 348195579793STom Rini 34826a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 34836a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 34846a11cf48SDaniel Schwierzeck 34856a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 34866a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 34876a11cf48SDaniel Schwierzeck 34886a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 34896a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 34906a11cf48SDaniel Schwierzeck 3491c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 3492c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 3493c57b953dSPavel Machek 34946a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 34956a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 34961372cce2SMarian Balakowicz 3497ba1bee43SYing Zhang CONFIG_SPL_ENV_SUPPORT 3498ba1bee43SYing Zhang Support for the environment operating in SPL binary 3499ba1bee43SYing Zhang 3500ba1bee43SYing Zhang CONFIG_SPL_NET_SUPPORT 3501ba1bee43SYing Zhang Support for the net/libnet.o in SPL binary. 3502ba1bee43SYing Zhang It conflicts with SPL env from storage medium specified by 3503ba1bee43SYing Zhang CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE 3504ba1bee43SYing Zhang 350574752baaSScott Wood CONFIG_SPL_PAD_TO 35066113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 35076113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 35086113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 35096113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 35106113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 351174752baaSScott Wood 3512ca2fca22SScott Wood CONFIG_SPL_TARGET 3513ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 3514ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 3515ca2fca22SScott Wood example if more than one image needs to be produced. 3516ca2fca22SScott Wood 351787ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 351887ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 351987ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 352087ebee39SSimon Glass option to re-enable it. This will affect the output of the 352187ebee39SSimon Glass bootm command when booting a FIT image. 352287ebee39SSimon Glass 35233aa29de0SYing Zhang- TPL framework 35243aa29de0SYing Zhang CONFIG_TPL 35253aa29de0SYing Zhang Enable building of TPL globally. 35263aa29de0SYing Zhang 35273aa29de0SYing Zhang CONFIG_TPL_PAD_TO 35283aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 35293aa29de0SYing Zhang the TPL payload. By default, this is defined as 35303aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 35313aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 35323aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 35333aa29de0SYing Zhang 3534c609719bSwdenkModem Support: 3535c609719bSwdenk-------------- 3536c609719bSwdenk 3537566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 3538c609719bSwdenk 353911ccc33fSMarcel Ziswiler- Modem support enable: 3540c609719bSwdenk CONFIG_MODEM_SUPPORT 3541c609719bSwdenk 3542c609719bSwdenk- RTS/CTS Flow control enable: 3543c609719bSwdenk CONFIG_HWFLOW 3544c609719bSwdenk 3545c609719bSwdenk- Modem debug support: 3546c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 3547c609719bSwdenk 3548c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 3549c609719bSwdenk for modem support. Useful only with BDI2000. 3550c609719bSwdenk 3551a8c7c708Swdenk- Interrupt support (PPC): 3552a8c7c708Swdenk 3553a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 3554a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 355511ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 3556a8c7c708Swdenk should set decrementer_count to appropriate value. If 355711ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 3558a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 355911ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 3560a8c7c708Swdenk specific handling. If board has watchdog / status_led 3561a8c7c708Swdenk / other_activity_monitor it works automatically from 3562a8c7c708Swdenk general timer_interrupt(). 3563a8c7c708Swdenk 3564c609719bSwdenk- General: 3565c609719bSwdenk 3566c609719bSwdenk In the target system modem support is enabled when a 3567c609719bSwdenk specific key (key combination) is pressed during 3568c609719bSwdenk power-on. Otherwise U-Boot will boot normally 356911ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 3570c609719bSwdenk board_init(). Currently key_pressed() is a dummy 3571c609719bSwdenk function, returning 1 and thus enabling modem 3572c609719bSwdenk initialization. 3573c609719bSwdenk 3574c609719bSwdenk If there are no modem init strings in the 3575c609719bSwdenk environment, U-Boot proceed to autoboot; the 3576c609719bSwdenk previous output (banner, info printfs) will be 357711ccc33fSMarcel Ziswiler suppressed, though. 3578c609719bSwdenk 3579c609719bSwdenk See also: doc/README.Modem 3580c609719bSwdenk 35819660e442SHelmut RaigerBoard initialization settings: 35829660e442SHelmut Raiger------------------------------ 35839660e442SHelmut Raiger 35849660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 35859660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 35869660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 35879660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 35889660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 35899660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 35909660e442SHelmut Raiger 35919660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 35929660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 35939660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 35949660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 3595c609719bSwdenk 3596c609719bSwdenkConfiguration Settings: 3597c609719bSwdenk----------------------- 3598c609719bSwdenk 35994d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 36004d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 36014d1fd7f1SYork Sun 36026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 3603c609719bSwdenk undefine this when you're short of memory. 3604c609719bSwdenk 36052fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 36062fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 36072fb2604dSPeter Tyser 36086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 3609c609719bSwdenk prompt for user input. 3610c609719bSwdenk 36116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 3612c609719bSwdenk 36136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 3614c609719bSwdenk 36156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 3616c609719bSwdenk 36176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 3618c609719bSwdenk the application (usually a Linux kernel) when it is 3619c609719bSwdenk booted 3620c609719bSwdenk 36216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 3622c609719bSwdenk List of legal baudrate settings for this board. 3623c609719bSwdenk 36246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 3625c609719bSwdenk Suppress display of console information at boot. 3626c609719bSwdenk 36276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 3628c609719bSwdenk If the board specific function 3629c609719bSwdenk extern int overwrite_console (void); 3630c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 3631c609719bSwdenk serial port, else the settings in the environment are used. 3632c609719bSwdenk 36336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 3634c609719bSwdenk Enable the call to overwrite_console(). 3635c609719bSwdenk 36366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 3637c609719bSwdenk Enable overwrite of previous console environment settings. 3638c609719bSwdenk 36396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 3640c609719bSwdenk Begin and End addresses of the area used by the 3641c609719bSwdenk simple memory test. 3642c609719bSwdenk 36436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3644c609719bSwdenk Enable an alternate, more extensive memory test. 3645c609719bSwdenk 36466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 36475f535fe1Swdenk Scratch address used by the alternate memory test 36485f535fe1Swdenk You only need to set this if address zero isn't writeable 36495f535fe1Swdenk 36506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 36516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 365214f73ca6SStefan Roese this specified memory area will get subtracted from the top 365311ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 365414f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 365514f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 365614f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 36575e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 365814f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 36595e12e75dSStefan Roese will have to get fixed in Linux additionally. 366014f73ca6SStefan Roese 366114f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 366214f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 366314f73ca6SStefan Roese be touched. 366414f73ca6SStefan Roese 366514f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 366614f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 366714f73ca6SStefan Roese then the end address of the Linux memory will be located at a 366814f73ca6SStefan Roese non page size aligned address and this could cause major 366914f73ca6SStefan Roese problems. 367014f73ca6SStefan Roese 36716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3672c609719bSwdenk Enable temporary baudrate change while serial download 3673c609719bSwdenk 36746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3675c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3676c609719bSwdenk 36776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3678c609719bSwdenk Physical start address of Motherboard I/O (if using a 3679c609719bSwdenk Cogent motherboard) 3680c609719bSwdenk 36816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3682c609719bSwdenk Physical start address of Flash memory. 3683c609719bSwdenk 36846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3685c609719bSwdenk Physical start address of boot monitor code (set by 3686c609719bSwdenk make config files to be same as the text base address 368714d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 36886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3689c609719bSwdenk 36906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 36913b57fe0aSwdenk Size of memory reserved for monitor code, used to 36923b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 36933b57fe0aSwdenk embedded within the U-Boot image, or in a separate 36943b57fe0aSwdenk flash sector. 3695c609719bSwdenk 36966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3697c609719bSwdenk Size of DRAM reserved for malloc() use. 3698c609719bSwdenk 36996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 370015940c9aSStefan Roese Normally compressed uImages are limited to an 370115940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 37026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 370315940c9aSStefan Roese to adjust this setting to your needs. 3704c609719bSwdenk 37056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3706c609719bSwdenk Maximum size of memory mapped by the startup code of 3707c609719bSwdenk the Linux kernel; all data that must be processed by 37087d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 37097d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 37101bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 37117d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3712c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3713c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3714c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3715c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3716c609719bSwdenk 3717fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3718fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3719fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3720fca43cc8SJohn Rigby is enabled. 3721fca43cc8SJohn Rigby 3722fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3723fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3724fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3725fca43cc8SJohn Rigby 3726fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3727fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3728fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3729fca43cc8SJohn Rigby 37306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3731c609719bSwdenk Max number of Flash memory banks 3732c609719bSwdenk 37336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3734c609719bSwdenk Max number of sectors on a Flash chip 3735c609719bSwdenk 37366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3737c609719bSwdenk Timeout for Flash erase operations (in ms) 3738c609719bSwdenk 37396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3740c609719bSwdenk Timeout for Flash write operations (in ms) 3741c609719bSwdenk 37426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 37438564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 37448564acf9Swdenk 37456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 37468564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 37478564acf9Swdenk 37486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 37498564acf9Swdenk If defined, hardware flash sectors protection is used 37508564acf9Swdenk instead of U-Boot software protection. 37518564acf9Swdenk 37526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3753c609719bSwdenk 3754c609719bSwdenk Enable TFTP transfers directly to flash memory; 3755c609719bSwdenk without this option such a download has to be 3756c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3757c609719bSwdenk copy from RAM to flash. 3758c609719bSwdenk 3759c609719bSwdenk The two-step approach is usually more reliable, since 3760c609719bSwdenk you can check if the download worked before you erase 376111ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 376211ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3763c609719bSwdenk downloaded image) this option may be very useful. 3764c609719bSwdenk 37656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3766c609719bSwdenk Define if the flash driver uses extra elements in the 37675653fc33Swdenk common flash structure for storing flash geometry. 37685653fc33Swdenk 376900b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 37705653fc33Swdenk This option also enables the building of the cfi_flash driver 37715653fc33Swdenk in the drivers directory 377253cf9435Sstroese 377391809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 377491809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 377591809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 377691809ed5SPiotr Ziecik to the MTD layer. 377791809ed5SPiotr Ziecik 37786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 377996ef831fSGuennadi Liakhovetski Use buffered writes to flash. 378096ef831fSGuennadi Liakhovetski 378196ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 378296ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 378396ef831fSGuennadi Liakhovetski write commands. 378496ef831fSGuennadi Liakhovetski 37856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 37865568e613SStefan Roese If this option is defined, the common CFI flash doesn't 37875568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 37885568e613SStefan Roese is useful, if some of the configured banks are only 37895568e613SStefan Roese optionally available. 37905568e613SStefan Roese 37919a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 37929a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 37939a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 37949a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 37959a042e9cSJerry Van Baren 3796352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3797352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3798352ef3f1SStefan Roese against the source after the write operation. An error message 3799352ef3f1SStefan Roese will be printed when the contents are not identical. 3800352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3801352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3802352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3803352ef3f1SStefan Roese this option if you really know what you are doing. 3804352ef3f1SStefan Roese 38056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 380611ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 380711ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 380853cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 380953cf9435Sstroese buffers can be full shortly after enabling the interface 381011ccc33fSMarcel Ziswiler on high Ethernet traffic. 381153cf9435Sstroese Defaults to 4 if not defined. 3812c609719bSwdenk 3813ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3814ea882bafSWolfgang Denk 3815ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3816ea882bafSWolfgang Denk internally to store the environment settings. The default 3817ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3818ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3819ea882bafSWolfgang Denk lib/hashtable.c for details. 3820ea882bafSWolfgang Denk 38212598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 38222598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 38231bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 38242598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 38252598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 38262598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 38272598090bSJoe Hershberger 38282598090bSJoe Hershberger The format of the list is: 38292598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3830267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3831267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 38322598090bSJoe Hershberger entry = variable_name[:attributes] 38332598090bSJoe Hershberger list = entry[,list] 38342598090bSJoe Hershberger 38352598090bSJoe Hershberger The type attributes are: 38362598090bSJoe Hershberger s - String (default) 38372598090bSJoe Hershberger d - Decimal 38382598090bSJoe Hershberger x - Hexadecimal 38392598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 38402598090bSJoe Hershberger i - IP address 38412598090bSJoe Hershberger m - MAC address 38422598090bSJoe Hershberger 3843267541f7SJoe Hershberger The access attributes are: 3844267541f7SJoe Hershberger a - Any (default) 3845267541f7SJoe Hershberger r - Read-only 3846267541f7SJoe Hershberger o - Write-once 3847267541f7SJoe Hershberger c - Change-default 3848267541f7SJoe Hershberger 38492598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 38502598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 38512598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 38522598090bSJoe Hershberger 38532598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 38542598090bSJoe Hershberger Define this to a list (string) to define validation that 38552598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 38562598090bSJoe Hershberger environment variable. To override a setting in the static 38572598090bSJoe Hershberger list, simply add an entry for the same variable name to the 38582598090bSJoe Hershberger ".flags" variable. 38592598090bSJoe Hershberger 3860267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3861267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3862267541f7SJoe Hershberger access flags. 3863267541f7SJoe Hershberger 38645c1a7ea6SSimon Glass- CONFIG_SYS_GENERIC_BOARD 38655c1a7ea6SSimon Glass This selects the architecture-generic board system instead of the 38665c1a7ea6SSimon Glass architecture-specific board files. It is intended to move boards 38675c1a7ea6SSimon Glass to this new framework over time. Defining this will disable the 38685c1a7ea6SSimon Glass arch/foo/lib/board.c file and use common/board_f.c and 38695c1a7ea6SSimon Glass common/board_r.c instead. To use this option your architecture 38705c1a7ea6SSimon Glass must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in 38715c1a7ea6SSimon Glass its config.mk file). If you find problems enabling this option on 38725c1a7ea6SSimon Glass your board please report the problem and send patches! 38735c1a7ea6SSimon Glass 38740b1b60c7SLokesh Vutla- CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) 38750b1b60c7SLokesh Vutla This is set by OMAP boards for the max time that reset should 38760b1b60c7SLokesh Vutla be asserted. See doc/README.omap-reset-time for details on how 38770b1b60c7SLokesh Vutla the value can be calulated on a given board. 3878632efa74SSimon Glass 3879c609719bSwdenkThe following definitions that deal with the placement and management 3880c609719bSwdenkof environment data (variable area); in general, we support the 3881c609719bSwdenkfollowing configurations: 3882c609719bSwdenk 3883c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3884c3eb3fe4SMike Frysinger 3885c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3886c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3887c3eb3fe4SMike Frysinger 38885a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3889c609719bSwdenk 3890c609719bSwdenk Define this if the environment is in flash memory. 3891c609719bSwdenk 3892c609719bSwdenk a) The environment occupies one whole flash sector, which is 3893c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3894c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3895c609719bSwdenk sector" type flash chips, which have several smaller 3896c609719bSwdenk sectors at the start or the end. For instance, such a 3897c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3898c609719bSwdenk such a case you would place the environment in one of the 3899c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3900c609719bSwdenk "top boot sector" type flash chips, you would put the 3901c609719bSwdenk environment in one of the last sectors, leaving a gap 3902c609719bSwdenk between U-Boot and the environment. 3903c609719bSwdenk 39040e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3905c609719bSwdenk 3906c609719bSwdenk Offset of environment data (variable area) to the 3907c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3908c609719bSwdenk type flash chips the second sector can be used: the offset 3909c609719bSwdenk for this sector is given here. 3910c609719bSwdenk 39116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3912c609719bSwdenk 39130e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3914c609719bSwdenk 3915c609719bSwdenk This is just another way to specify the start address of 3916c609719bSwdenk the flash sector containing the environment (instead of 39170e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3918c609719bSwdenk 39190e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3920c609719bSwdenk 3921c609719bSwdenk Size of the sector containing the environment. 3922c609719bSwdenk 3923c609719bSwdenk 3924c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3925c609719bSwdenk In such a case you don't want to spend a whole sector for 3926c609719bSwdenk the environment. 3927c609719bSwdenk 39280e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3929c609719bSwdenk 39305a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 39310e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3932c609719bSwdenk of this flash sector for the environment. This saves 3933c609719bSwdenk memory for the RAM copy of the environment. 3934c609719bSwdenk 3935c609719bSwdenk It may also save flash memory if you decide to use this 3936c609719bSwdenk when your environment is "embedded" within U-Boot code, 3937c609719bSwdenk since then the remainder of the flash sector could be used 3938c609719bSwdenk for U-Boot code. It should be pointed out that this is 3939c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3940c609719bSwdenk updating the environment in flash makes it always 3941c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3942c609719bSwdenk wrong before the contents has been restored from a copy in 3943c609719bSwdenk RAM, your target system will be dead. 3944c609719bSwdenk 39450e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 39460e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3947c609719bSwdenk 3948c609719bSwdenk These settings describe a second storage area used to hold 394911ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 39503e38691eSwdenk a valid backup copy in case there is a power failure during 3951c609719bSwdenk a "saveenv" operation. 3952c609719bSwdenk 3953c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3954c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3955c609719bSwdenkaccordingly! 3956c609719bSwdenk 3957c609719bSwdenk 39589314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3959c609719bSwdenk 3960c609719bSwdenk Define this if you have some non-volatile memory device 3961c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3962c609719bSwdenk environment. 3963c609719bSwdenk 39640e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 39650e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3966c609719bSwdenk 396711ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3968c609719bSwdenk want to use for environment. It is assumed that this memory 3969c609719bSwdenk can just be read and written to, without any special 3970c609719bSwdenk provision. 3971c609719bSwdenk 3972c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3973c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 397411ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3975c609719bSwdenkU-Boot will hang. 3976c609719bSwdenk 3977c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3978c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3979c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3980c609719bSwdenkto save the current settings. 3981c609719bSwdenk 3982c609719bSwdenk 3983bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3984c609719bSwdenk 3985c609719bSwdenk Use this if you have an EEPROM or similar serial access 3986c609719bSwdenk device and a driver for it. 3987c609719bSwdenk 39880e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 39890e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3990c609719bSwdenk 3991c609719bSwdenk These two #defines specify the offset and size of the 3992c609719bSwdenk environment area within the total memory of your EEPROM. 3993c609719bSwdenk 39946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3995c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3996c609719bSwdenk The default address is zero. 3997c609719bSwdenk 39986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3999c609719bSwdenk If defined, the number of bits used to address bytes in a 4000c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 4001c609719bSwdenk would require six bits. 4002c609719bSwdenk 40036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 4004c609719bSwdenk If defined, the number of milliseconds to delay between 4005c609719bSwdenk page writes. The default is zero milliseconds. 4006c609719bSwdenk 40076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 4008c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 4009c609719bSwdenk that this is NOT the chip address length! 4010c609719bSwdenk 40116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 40125cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 40135cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 40145cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 40155cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 40165cf91d6bSwdenk byte chips. 40175cf91d6bSwdenk 40185cf91d6bSwdenk Note that we consider the length of the address field to 40195cf91d6bSwdenk still be one byte because the extra address bits are hidden 40205cf91d6bSwdenk in the chip address. 40215cf91d6bSwdenk 40226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 4023c609719bSwdenk The size in bytes of the EEPROM device. 4024c609719bSwdenk 4025548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 4026548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 4027548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 4028548738b4SHeiko Schocher 4029548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 4030548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 4031548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 4032548738b4SHeiko Schocher EEPROM. For example: 4033548738b4SHeiko Schocher 4034ea818dbbSHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS 1 4035548738b4SHeiko Schocher 4036548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 4037548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 4038c609719bSwdenk 4039057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 40405779d8d9Swdenk 40415779d8d9Swdenk Define this if you have a DataFlash memory device which you 40425779d8d9Swdenk want to use for the environment. 40435779d8d9Swdenk 40440e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 40450e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 40460e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 40475779d8d9Swdenk 40485779d8d9Swdenk These three #defines specify the offset and size of the 40495779d8d9Swdenk environment area within the total memory of your DataFlash placed 40505779d8d9Swdenk at the specified address. 40515779d8d9Swdenk 40520a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 40530a85a9e7SLiu Gang 40540a85a9e7SLiu Gang Define this if you have a remote memory space which you 40550a85a9e7SLiu Gang want to use for the local device's environment. 40560a85a9e7SLiu Gang 40570a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 40580a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 40590a85a9e7SLiu Gang 40600a85a9e7SLiu Gang These two #defines specify the address and size of the 40610a85a9e7SLiu Gang environment area within the remote memory space. The 40620a85a9e7SLiu Gang local device can get the environment from remote memory 4063fc54c7faSLiu Gang space by SRIO or PCIE links. 40640a85a9e7SLiu Gang 40650a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 40660a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 4067fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 4068fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 40690a85a9e7SLiu Gang 407051bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 407113a5695bSwdenk 407213a5695bSwdenk Define this if you have a NAND device which you want to use 407313a5695bSwdenk for the environment. 407413a5695bSwdenk 40750e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 40760e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 407713a5695bSwdenk 407813a5695bSwdenk These two #defines specify the offset and size of the environment 4079fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 4080fdd813deSScott Wood aligned to an erase block boundary. 40815779d8d9Swdenk 4082fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 4083e443c944SMarkus Klotzbuecher 40840e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 4085fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 4086fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 4087fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 4088fdd813deSScott Wood aligned to an erase block boundary. 4089e443c944SMarkus Klotzbuecher 4090fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 4091fdd813deSScott Wood 4092fdd813deSScott Wood Specifies the length of the region in which the environment 4093fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 4094fdd813deSScott Wood block size. Specifying a range with more erase blocks than 4095fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 4096fdd813deSScott Wood the range to be avoided. 4097fdd813deSScott Wood 4098fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 4099fdd813deSScott Wood 4100fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 4101fdd813deSScott Wood environment from block zero's out-of-band data. The 4102fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 4103fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 4104fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 4105e443c944SMarkus Klotzbuecher 4106b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 4107b74ab737SGuennadi Liakhovetski 4108b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 4109b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 4110b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 4111b74ab737SGuennadi Liakhovetski 41122b74433fSJoe Hershberger- CONFIG_ENV_IS_IN_UBI: 41132b74433fSJoe Hershberger 41142b74433fSJoe Hershberger Define this if you have an UBI volume that you want to use for the 41152b74433fSJoe Hershberger environment. This has the benefit of wear-leveling the environment 41162b74433fSJoe Hershberger accesses, which is important on NAND. 41172b74433fSJoe Hershberger 41182b74433fSJoe Hershberger - CONFIG_ENV_UBI_PART: 41192b74433fSJoe Hershberger 41202b74433fSJoe Hershberger Define this to a string that is the mtd partition containing the UBI. 41212b74433fSJoe Hershberger 41222b74433fSJoe Hershberger - CONFIG_ENV_UBI_VOLUME: 41232b74433fSJoe Hershberger 41242b74433fSJoe Hershberger Define this to the name of the volume that you want to store the 41252b74433fSJoe Hershberger environment in. 41262b74433fSJoe Hershberger 4127785881f7SJoe Hershberger - CONFIG_ENV_UBI_VOLUME_REDUND: 4128785881f7SJoe Hershberger 4129785881f7SJoe Hershberger Define this to the name of another volume to store a second copy of 4130785881f7SJoe Hershberger the environment in. This will enable redundant environments in UBI. 4131785881f7SJoe Hershberger It is assumed that both volumes are in the same MTD partition. 4132785881f7SJoe Hershberger 41332b74433fSJoe Hershberger - CONFIG_UBI_SILENCE_MSG 41342b74433fSJoe Hershberger - CONFIG_UBIFS_SILENCE_MSG 41352b74433fSJoe Hershberger 41362b74433fSJoe Hershberger You will probably want to define these to avoid a really noisy system 41372b74433fSJoe Hershberger when storing the env in UBI. 41382b74433fSJoe Hershberger 413906e4ae5fSStephen Warren- CONFIG_ENV_IS_IN_MMC: 414006e4ae5fSStephen Warren 414106e4ae5fSStephen Warren Define this if you have an MMC device which you want to use for the 414206e4ae5fSStephen Warren environment. 414306e4ae5fSStephen Warren 414406e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_DEV: 414506e4ae5fSStephen Warren 414606e4ae5fSStephen Warren Specifies which MMC device the environment is stored in. 414706e4ae5fSStephen Warren 414806e4ae5fSStephen Warren - CONFIG_SYS_MMC_ENV_PART (optional): 414906e4ae5fSStephen Warren 415006e4ae5fSStephen Warren Specifies which MMC partition the environment is stored in. If not 415106e4ae5fSStephen Warren set, defaults to partition 0, the user area. Common values might be 415206e4ae5fSStephen Warren 1 (first MMC boot partition), 2 (second MMC boot partition). 415306e4ae5fSStephen Warren 415406e4ae5fSStephen Warren - CONFIG_ENV_OFFSET: 415506e4ae5fSStephen Warren - CONFIG_ENV_SIZE: 415606e4ae5fSStephen Warren 415706e4ae5fSStephen Warren These two #defines specify the offset and size of the environment 415806e4ae5fSStephen Warren area within the specified MMC device. 415906e4ae5fSStephen Warren 41605c088ee8SStephen Warren If offset is positive (the usual case), it is treated as relative to 41615c088ee8SStephen Warren the start of the MMC partition. If offset is negative, it is treated 41625c088ee8SStephen Warren as relative to the end of the MMC partition. This can be useful if 41635c088ee8SStephen Warren your board may be fitted with different MMC devices, which have 41645c088ee8SStephen Warren different sizes for the MMC partitions, and you always want the 41655c088ee8SStephen Warren environment placed at the very end of the partition, to leave the 41665c088ee8SStephen Warren maximum possible space before it, to store other data. 41675c088ee8SStephen Warren 416806e4ae5fSStephen Warren These two values are in units of bytes, but must be aligned to an 416906e4ae5fSStephen Warren MMC sector boundary. 417006e4ae5fSStephen Warren 417106e4ae5fSStephen Warren - CONFIG_ENV_OFFSET_REDUND (optional): 417206e4ae5fSStephen Warren 417306e4ae5fSStephen Warren Specifies a second storage area, of CONFIG_ENV_SIZE size, used to 417406e4ae5fSStephen Warren hold a redundant copy of the environment data. This provides a 417506e4ae5fSStephen Warren valid backup copy in case the other copy is corrupted, e.g. due 417606e4ae5fSStephen Warren to a power failure during a "saveenv" operation. 417706e4ae5fSStephen Warren 41785c088ee8SStephen Warren This value may also be positive or negative; this is handled in the 41795c088ee8SStephen Warren same way as CONFIG_ENV_OFFSET. 41805c088ee8SStephen Warren 418106e4ae5fSStephen Warren This value is also in units of bytes, but must also be aligned to 418206e4ae5fSStephen Warren an MMC sector boundary. 418306e4ae5fSStephen Warren 418406e4ae5fSStephen Warren - CONFIG_ENV_SIZE_REDUND (optional): 418506e4ae5fSStephen Warren 418606e4ae5fSStephen Warren This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is 418706e4ae5fSStephen Warren set. If this value is set, it must be set to the same value as 418806e4ae5fSStephen Warren CONFIG_ENV_SIZE. 418906e4ae5fSStephen Warren 41906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 4191c609719bSwdenk 4192c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 4193c609719bSwdenk area is used at an early stage (ROM part) if the environment 4194c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 4195c609719bSwdenk scratch DPRAM area. It is used between the two initialization 4196c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 4197c609719bSwdenk to be a good choice since it makes it far enough from the 4198c609719bSwdenk start of the data area as well as from the stack pointer. 4199c609719bSwdenk 4200e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 4201c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 4202cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 4203c609719bSwdenkuntil then to read environment variables. 4204c609719bSwdenk 420585ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 420685ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 420785ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 420885ec0bccSwdenknecessary, because the first environment variable we need is the 420985ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 421085ec0bccSwdenkhave any device yet where we could complain.] 4211c609719bSwdenk 4212c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 4213c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 421485ec0bccSwdenkuse the "saveenv" command to store a valid environment. 4215c609719bSwdenk 42166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 4217fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 4218fc3e2165Swdenk 42196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 4220fc3e2165Swdenk also needs to be defined. 4221fc3e2165Swdenk 42226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 4223fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 4224c609719bSwdenk 4225f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 4226f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 4227f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 4228f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 4229f5675aa5SRon Madrid space for already greatly restricted images, including but not 4230f5675aa5SRon Madrid limited to NAND_SPL configurations. 4231f5675aa5SRon Madrid 4232b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 4233b2b92f53SSimon Glass Display information about the board that U-Boot is running on 4234b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 4235b2b92f53SSimon Glass to do this. 4236b2b92f53SSimon Glass 4237e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 4238e2e3e2b1SSimon Glass Similar to the previous option, but display this information 4239e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 4240e2e3e2b1SSimon Glass present. 4241e2e3e2b1SSimon Glass 4242c609719bSwdenkLow Level (hardware related) configuration options: 4243dc7c9a1aSwdenk--------------------------------------------------- 4244c609719bSwdenk 42456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 4246c609719bSwdenk Cache Line Size of the CPU. 4247c609719bSwdenk 42486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 4249c609719bSwdenk Default address of the IMMR after system reset. 42502535d602Swdenk 42512535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 42522535d602Swdenk and RPXsuper) to be able to adjust the position of 42532535d602Swdenk the IMMR register after a reset. 4254c609719bSwdenk 4255e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 4256e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 4257e46fedfeSTimur Tabi PowerPC SOCs. 4258e46fedfeSTimur Tabi 4259e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 4260e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 4261e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 4262e46fedfeSTimur Tabi 4263e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 4264e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 4265e46fedfeSTimur Tabi 4266e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 4267e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 4268e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 4269e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 4270e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 4271e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 4272e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 4273e46fedfeSTimur Tabi 4274e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 4275e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 4276e46fedfeSTimur Tabi 4277e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 4278e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 4279e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 4280e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4281e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4282e46fedfeSTimur Tabi 4283e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 4284e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 4285e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 4286e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 4287e46fedfeSTimur Tabi 4288e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 4289e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 4290e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 4291e46fedfeSTimur Tabi 42927f6c2cbcSwdenk- Floppy Disk Support: 42936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 42947f6c2cbcSwdenk 42957f6c2cbcSwdenk the default drive number (default value 0) 42967f6c2cbcSwdenk 42976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 42987f6c2cbcSwdenk 429911ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 43007f6c2cbcSwdenk (default value 1) 43017f6c2cbcSwdenk 43026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 43037f6c2cbcSwdenk 43047f6c2cbcSwdenk defines the offset of register from address. It 43057f6c2cbcSwdenk depends on which part of the data bus is connected to 430611ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 43077f6c2cbcSwdenk 43086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 43096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 43107f6c2cbcSwdenk default value. 43117f6c2cbcSwdenk 43126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 43137f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 43147f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 43157f6c2cbcSwdenk source code. It is used to make hardware dependant 43167f6c2cbcSwdenk initializations. 43177f6c2cbcSwdenk 43180abddf82SMacpaul Lin- CONFIG_IDE_AHB: 43190abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 43200abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 43210abddf82SMacpaul Lin When software is doing ATA command and data transfer to 43220abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 43230abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 43240abddf82SMacpaul Lin is requierd. 43250abddf82SMacpaul Lin 43266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 432725d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 432825d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 4329c609719bSwdenk 43306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 4331c609719bSwdenk 43327152b1d0Swdenk Start address of memory area that can be used for 4333c609719bSwdenk initial data and stack; please note that this must be 4334c609719bSwdenk writable memory that is working WITHOUT special 4335c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 4336c609719bSwdenk will become available only after programming the 4337c609719bSwdenk memory controller and running certain initialization 4338c609719bSwdenk sequences. 4339c609719bSwdenk 4340c609719bSwdenk U-Boot uses the following memory types: 4341c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 4342c609719bSwdenk - MPC824X: data cache 4343c609719bSwdenk - PPC4xx: data cache 4344c609719bSwdenk 43456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 4346c609719bSwdenk 4347c609719bSwdenk Offset of the initial data structure in the memory 43486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 43496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 4350c609719bSwdenk data is located at the end of the available space 4351553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 43526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 43536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 43546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 4355c609719bSwdenk 4356c609719bSwdenk Note: 4357c609719bSwdenk On the MPC824X (or other systems that use the data 4358c609719bSwdenk cache for initial memory) the address chosen for 43596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 4360c609719bSwdenk point to an otherwise UNUSED address space between 4361c609719bSwdenk the top of RAM and the start of the PCI space. 4362c609719bSwdenk 43636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 4364c609719bSwdenk 43656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 4366c609719bSwdenk 43676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 4368c609719bSwdenk 43696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 4370c609719bSwdenk 43716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 4372c609719bSwdenk 43736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 4374c609719bSwdenk 43756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 4376c609719bSwdenk SDRAM timing 4377c609719bSwdenk 43786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 4379c609719bSwdenk periodic timer for refresh 4380c609719bSwdenk 43816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 4382c609719bSwdenk 43836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 43846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 43856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 43866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 4387c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 4388c609719bSwdenk 4389c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 43906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 43916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 4392c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 4393c609719bSwdenk 43946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 43956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 4396c609719bSwdenk Machine Mode Register and Memory Periodic Timer 4397c609719bSwdenk Prescaler definitions (SDRAM timing) 4398c609719bSwdenk 43996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 4400c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 4401c609719bSwdenk define relocation offset in DPRAM [DSP2] 4402c609719bSwdenk 44036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 4404b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 4405b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 4406b423d055SHeiko Schocher 44076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 4408c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 4409c609719bSwdenk define relocation offset in DPRAM [SCC4] 4410c609719bSwdenk 44116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 4412c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 4413c609719bSwdenk wrong setting might damage your board. Read 4414c609719bSwdenk doc/README.MBX before setting this variable! 4415c609719bSwdenk 44166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 4417ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 4418ea909b76Swdenk (Power On Self Tests). This definition overrides 4419ea909b76Swdenk #define'd default value in commproc.h resp. 4420ea909b76Swdenk cpm_8260.h. 4421ea909b76Swdenk 44226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 44236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 44246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 44256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 44266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 44276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 44286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 44296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 4430a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 44315d232d0eSwdenk 44329cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 44339cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 44349cacf4fcSDirk Eibach required. 44359cacf4fcSDirk Eibach 443669fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 443769fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 443869fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 443969fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 444069fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 444169fd2d3bSAndrew Sharp by coreboot or similar. 444269fd2d3bSAndrew Sharp 4443842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 4444842033e6SGabor Juhos Enable support for indirect PCI bridges. 4445842033e6SGabor Juhos 4446a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 4447a09b9b68SKumar Gala Chip has SRIO or not 4448a09b9b68SKumar Gala 4449a09b9b68SKumar Gala- CONFIG_SRIO1: 4450a09b9b68SKumar Gala Board has SRIO 1 port available 4451a09b9b68SKumar Gala 4452a09b9b68SKumar Gala- CONFIG_SRIO2: 4453a09b9b68SKumar Gala Board has SRIO 2 port available 4454a09b9b68SKumar Gala 4455c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 4456c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 4457c8b28152SLiu Gang 4458a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 4459a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 4460a09b9b68SKumar Gala 4461a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 4462a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 4463a09b9b68SKumar Gala 4464a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 4465a09b9b68SKumar Gala Size of SRIO port 'n' memory region 4466a09b9b68SKumar Gala 446766bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 446866bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 446966bd1846SFabio Estevam a 16 bit bus. 447066bd1846SFabio Estevam Not all NAND drivers use this symbol. 4471a430e916SFabio Estevam Example of drivers that use it: 447266bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 4473a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 4474eced4626SAlex Waterman 4475eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 4476eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 4477eced4626SAlex Waterman a default value will be used. 4478eced4626SAlex Waterman 4479bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 4480218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 4481218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 4482218ca724SWolfgang Denk 4483bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 4484bb99ad6dSBen Warren I2C address of the SPD EEPROM 4485bb99ad6dSBen Warren 44866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 4487218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 4488218ca724SWolfgang Denk one, specify here. Note that the value must resolve 4489218ca724SWolfgang Denk to something your driver can deal with. 4490bb99ad6dSBen Warren 44911b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 44921b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 44931b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 44941b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 44951b3e3c4fSYork Sun header files or board specific files. 44961b3e3c4fSYork Sun 44976f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 44986f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 44996f5e1dc5SYork Sun 45006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 4501218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 4502218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 45032ad6b513STimur Tabi 4504c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 4505c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 4506c26e454dSwdenk 4507c26e454dSwdenk- CONFIG_FEC[12]_PHY 4508c26e454dSwdenk Define to the hardcoded PHY address which corresponds 45096e592385Swdenk to the given FEC; i. e. 4510c26e454dSwdenk #define CONFIG_FEC1_PHY 4 4511c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 4512c26e454dSwdenk 4513c26e454dSwdenk When set to -1, means to probe for first available. 4514c26e454dSwdenk 4515c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 4516c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 4517c26e454dSwdenk (so program the FEC to ignore it). 4518c26e454dSwdenk 4519c26e454dSwdenk- CONFIG_RMII 4520c26e454dSwdenk Enable RMII mode for all FECs. 4521c26e454dSwdenk Note that this is a global option, we can't 4522c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 4523c26e454dSwdenk 45245cf91d6bSwdenk- CONFIG_CRC32_VERIFY 45255cf91d6bSwdenk Add a verify option to the crc32 command. 45265cf91d6bSwdenk The syntax is: 45275cf91d6bSwdenk 45285cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 45295cf91d6bSwdenk 45305cf91d6bSwdenk Where address/count indicate a memory area 45315cf91d6bSwdenk and crc32 is the correct crc32 which the 45325cf91d6bSwdenk area should have. 45335cf91d6bSwdenk 453456523f12Swdenk- CONFIG_LOOPW 453556523f12Swdenk Add the "loopw" memory command. This only takes effect if 4536602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 453756523f12Swdenk 45387b466641Sstroese- CONFIG_MX_CYCLIC 45397b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 45407b466641Sstroese "md/mw" commands. 45417b466641Sstroese Examples: 45427b466641Sstroese 45437b466641Sstroese => mdc.b 10 4 500 45447b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 45457b466641Sstroese 45467b466641Sstroese => mwc.l 100 12345678 10 45477b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 45487b466641Sstroese 45497b466641Sstroese This only takes effect if the memory commands are activated 4550602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 45517b466641Sstroese 45528aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 4553afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 4554e03f3169SWolfgang Denk low level initializations (like setting up the memory 4555e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 4556e03f3169SWolfgang Denk relocate itself into RAM. 45578aa1a2d1Swdenk 4558e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 4559e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 4560e03f3169SWolfgang Denk other boot loader or by a debugger which performs 4561e03f3169SWolfgang Denk these initializations itself. 45628aa1a2d1Swdenk 4563401bb30bSAneesh V- CONFIG_SPL_BUILD 4564df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 4565df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 4566df81238bSMagnus Lilja compiling a NAND SPL. 4567400558b5Swdenk 45683aa29de0SYing Zhang- CONFIG_TPL_BUILD 45693aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 45703aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 45713aa29de0SYing Zhang It is loaded by the SPL. 45723aa29de0SYing Zhang 45735df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 45745df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 45755df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 45765df572f0SYing Zhang previous 4k of the .text section. 45775df572f0SYing Zhang 45784213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 45794213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 45804213fc29SSimon Glass effective address. It is therefore not necessary to regard 45814213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 45824213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 45834213fc29SSimon Glass it maintains its own little RAM buffer which contains all 45844213fc29SSimon Glass addressable memory. This option causes some memory accesses 45854213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 45864213fc29SSimon Glass 4587d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 4588d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 4589d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 4590d8834a13SMatthias Weisser be used if available. These functions may be faster under some 4591d8834a13SMatthias Weisser conditions but may increase the binary size. 4592d8834a13SMatthias Weisser 4593588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 4594588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 4595588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 4596b16f521aSGabe Black 4597fc33705eSMark Jackson- CONFIG_SYS_MPUCLK 4598fc33705eSMark Jackson Defines the MPU clock speed (in MHz). 4599fc33705eSMark Jackson 4600fc33705eSMark Jackson NOTE : currently only supported on AM335x platforms. 46015b5ece9eSGabe Black 460216678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 460316678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 460416678eb4SHeiko Schocher 4605999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 4606999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 4607999d7d32SKaricheri, Muralidharan driver that uses this: 4608999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 4609999d7d32SKaricheri, Muralidharan 4610f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 4611f2717b47STimur Tabi----------------------------------- 4612f2717b47STimur Tabi 4613f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 4614f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 4615f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 4616f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 4617f2717b47STimur Tabiwithin that device. 4618f2717b47STimur Tabi 4619dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 4620dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 4621dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4622dcf1d774SZhao Qiang is also specified. 4623dcf1d774SZhao Qiang 4624dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 4625dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 4626f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 4627f2717b47STimur Tabi is also specified. 4628f2717b47STimur Tabi 4629f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 4630f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 4631f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 4632f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 4633f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 4634f2717b47STimur Tabi 4635f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 4636f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 4637f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 4638f2717b47STimur Tabi virtual address in NOR flash. 4639f2717b47STimur Tabi 4640f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 4641f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 4642f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 4643f2717b47STimur Tabi 4644f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 4645f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 4646f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4647f2717b47STimur Tabi 4648f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 4649f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 4650f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 4651f2717b47STimur Tabi 4652292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 4653292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 4654292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 4655fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 4656fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 4657fc54c7faSLiu Gang master's memory space. 4658f2717b47STimur Tabi 4659c609719bSwdenkBuilding the Software: 4660c609719bSwdenk====================== 4661c609719bSwdenk 4662218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 4663218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 4664218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 4665218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 4666218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 4667218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 4668c609719bSwdenk 4669218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 4670218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 4671218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 4672218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 4673218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 4674c609719bSwdenk 4675218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 4676218ca724SWolfgang Denk $ export CROSS_COMPILE 4677c609719bSwdenk 46782f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 46792f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 46802f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 46812f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 46822f8d396bSPeter Tyser 46832f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 46842f8d396bSPeter Tyser 46852f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 46862f8d396bSPeter Tyser be executed on computers running Windows. 46872f8d396bSPeter Tyser 4688c609719bSwdenkU-Boot is intended to be simple to build. After installing the 4689c609719bSwdenksources you must configure U-Boot for one specific board type. This 4690c609719bSwdenkis done by typing: 4691c609719bSwdenk 4692c609719bSwdenk make NAME_config 4693c609719bSwdenk 4694218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 46954d675ae6SMichael Jonesrations; see boards.cfg for supported names. 469654387ac9Swdenk 4697c609719bSwdenkNote: for some board special configuration names may exist; check if 4698c609719bSwdenk additional information is available from the board vendor; for 46992729af9dSwdenk instance, the TQM823L systems are available without (standard) 47002729af9dSwdenk or with LCD support. You can select such additional "features" 470111ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 4702c609719bSwdenk 47032729af9dSwdenk make TQM823L_config 47042729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 4705c609719bSwdenk 4706c609719bSwdenk make TQM823L_LCD_config 4707c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 4708c609719bSwdenk 4709c609719bSwdenk etc. 4710c609719bSwdenk 4711c609719bSwdenk 4712c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 47137152b1d0Swdenkimages ready for download to / installation on your system: 4714c609719bSwdenk 4715c609719bSwdenk- "u-boot.bin" is a raw binary image 4716c609719bSwdenk- "u-boot" is an image in ELF binary format 4717c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 4718c609719bSwdenk 4719baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 4720baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 4721baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 4722baf31249SMarian Balakowicz 4723baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 4724baf31249SMarian Balakowicz 4725baf31249SMarian Balakowicz make O=/tmp/build distclean 4726baf31249SMarian Balakowicz make O=/tmp/build NAME_config 4727baf31249SMarian Balakowicz make O=/tmp/build all 4728baf31249SMarian Balakowicz 4729baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 4730baf31249SMarian Balakowicz 4731baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4732baf31249SMarian Balakowicz make distclean 4733baf31249SMarian Balakowicz make NAME_config 4734baf31249SMarian Balakowicz make all 4735baf31249SMarian Balakowicz 4736baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 4737baf31249SMarian Balakowiczvariable. 4738baf31249SMarian Balakowicz 4739c609719bSwdenk 4740c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 4741c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 4742c609719bSwdenknative "make". 4743c609719bSwdenk 4744c609719bSwdenk 4745c609719bSwdenkIf the system board that you have is not listed, then you will need 4746c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 4747c609719bSwdenksteps: 4748c609719bSwdenk 4749c609719bSwdenk1. Add a new configuration option for your board to the toplevel 47504d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 47514d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 4752c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 475385ec0bccSwdenk files you need. In your board directory, you will need at least 475485ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 475585ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 475685ec0bccSwdenk your board 4757c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 4758c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 475985ec0bccSwdenk4. Run "make <board>_config" with your new name. 4760c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 4761c609719bSwdenk to be installed on your target system. 476285ec0bccSwdenk6. Debug and solve any problems that might arise. 4763c609719bSwdenk [Of course, this last step is much harder than it sounds.] 4764c609719bSwdenk 4765c609719bSwdenk 4766c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 4767c609719bSwdenk============================================================== 4768c609719bSwdenk 4769c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 4770c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 4771c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 4772c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 4773218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 4774c609719bSwdenk 4775c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 4776c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 4777c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 4778c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 4779c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 47807152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 4781218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 4782218ca724SWolfgang Denkyou can type 4783c609719bSwdenk 4784c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 4785c609719bSwdenk 4786c609719bSwdenkor to build on a native PowerPC system you can type 4787c609719bSwdenk 4788c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4789c609719bSwdenk 4790218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4791218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4792218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4793218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4794218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4795218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4796218ca724SWolfgang Denkvariable. For example: 4797baf31249SMarian Balakowicz 4798baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4799baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4800baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4801baf31249SMarian Balakowicz 4802218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4803218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4804218ca724SWolfgang Denkduring the whole build process. 4805baf31249SMarian Balakowicz 4806baf31249SMarian Balakowicz 4807c609719bSwdenkSee also "U-Boot Porting Guide" below. 4808c609719bSwdenk 4809c609719bSwdenk 4810c609719bSwdenkMonitor Commands - Overview: 4811c609719bSwdenk============================ 4812c609719bSwdenk 4813c609719bSwdenkgo - start application at address 'addr' 4814c609719bSwdenkrun - run commands in an environment variable 4815c609719bSwdenkbootm - boot application image from memory 4816c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 481744f074c7SMarek Vasutbootz - boot zImage from memory 4818c609719bSwdenktftpboot- boot image via network using TFTP protocol 4819c609719bSwdenk and env variables "ipaddr" and "serverip" 4820c609719bSwdenk (and eventually "gatewayip") 48211fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4822c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4823c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4824c609719bSwdenkloads - load S-Record file over serial line 4825c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4826c609719bSwdenkmd - memory display 4827c609719bSwdenkmm - memory modify (auto-incrementing) 4828c609719bSwdenknm - memory modify (constant address) 4829c609719bSwdenkmw - memory write (fill) 4830c609719bSwdenkcp - memory copy 4831c609719bSwdenkcmp - memory compare 4832c609719bSwdenkcrc32 - checksum calculation 48330f89c54bSPeter Tyseri2c - I2C sub-system 4834c609719bSwdenksspi - SPI utility commands 4835c609719bSwdenkbase - print or set address offset 4836c609719bSwdenkprintenv- print environment variables 4837c609719bSwdenksetenv - set environment variables 4838c609719bSwdenksaveenv - save environment variables to persistent storage 4839c609719bSwdenkprotect - enable or disable FLASH write protection 4840c609719bSwdenkerase - erase FLASH memory 4841c609719bSwdenkflinfo - print FLASH memory information 484210635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4843c609719bSwdenkbdinfo - print Board Info structure 4844c609719bSwdenkiminfo - print header information for application image 4845c609719bSwdenkconinfo - print console devices and informations 4846c609719bSwdenkide - IDE sub-system 4847c609719bSwdenkloop - infinite loop on address range 484856523f12Swdenkloopw - infinite write loop on address range 4849c609719bSwdenkmtest - simple RAM test 4850c609719bSwdenkicache - enable or disable instruction cache 4851c609719bSwdenkdcache - enable or disable data cache 4852c609719bSwdenkreset - Perform RESET of the CPU 4853c609719bSwdenkecho - echo args to console 4854c609719bSwdenkversion - print monitor version 4855c609719bSwdenkhelp - print online help 4856c609719bSwdenk? - alias for 'help' 4857c609719bSwdenk 4858c609719bSwdenk 4859c609719bSwdenkMonitor Commands - Detailed Description: 4860c609719bSwdenk======================================== 4861c609719bSwdenk 4862c609719bSwdenkTODO. 4863c609719bSwdenk 4864c609719bSwdenkFor now: just type "help <command>". 4865c609719bSwdenk 4866c609719bSwdenk 4867c609719bSwdenkEnvironment Variables: 4868c609719bSwdenk====================== 4869c609719bSwdenk 4870c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4871c609719bSwdenkcan be made persistent by saving to Flash memory. 4872c609719bSwdenk 4873c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4874c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4875c609719bSwdenkwithout a value can be used to delete a variable from the 4876c609719bSwdenkenvironment. As long as you don't save the environment you are 4877c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4878c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4879c609719bSwdenk 4880c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4881c96f86eeSWolfgang Denk 4882c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4883c609719bSwdenk 4884c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4885c609719bSwdenk 4886c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4887c609719bSwdenk 4888c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4889c609719bSwdenk 4890c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4891c609719bSwdenk 4892c609719bSwdenk bootfile - Name of the image to load with TFTP 4893c609719bSwdenk 48947d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 48957d721e34SBartlomiej Sieka command can be restricted. This variable is given as 48967d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 48977d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 48987d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 48997d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4900c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4901c3624e6eSGrant Likely bootm_mapsize. 4902c3624e6eSGrant Likely 4903c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4904c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4905c3624e6eSGrant Likely defines the size of the memory region starting at base 4906c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4907c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4908c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4909c3624e6eSGrant Likely used otherwise. 49107d721e34SBartlomiej Sieka 49117d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 49127d721e34SBartlomiej Sieka command can be restricted. This variable is given as 49137d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 49147d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 49157d721e34SBartlomiej Sieka environment variable. 49167d721e34SBartlomiej Sieka 49174bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 49184bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 49194bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 49204bae9090SBartlomiej Sieka 4921c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4922c609719bSwdenk "bootp" will just load perform a lookup of the 4923c609719bSwdenk configuration from the BOOTP server, but not try to 4924c609719bSwdenk load any image using TFTP 4925c609719bSwdenk 4926c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4927c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4928c609719bSwdenk be automatically started (by internally calling 4929c609719bSwdenk "bootm") 4930c609719bSwdenk 49314a6fd34bSwdenk If set to "no", a standalone image passed to the 49324a6fd34bSwdenk "bootm" command will be copied to the load address 49334a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 49344a6fd34bSwdenk This can be used to load and uncompress arbitrary 49354a6fd34bSwdenk data. 49364a6fd34bSwdenk 4937a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4938a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4939fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4940fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4941fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4942fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4943fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4944fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4945fa34f6b2SShawn Guo access it during the boot procedure. 4946fa34f6b2SShawn Guo 4947a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4948a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4949a28afca5SDavid A. Long to work it must reside in writable memory, have 4950a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4951a28afca5SDavid A. Long add the information it needs into it, and the memory 4952a28afca5SDavid A. Long must be accessible by the kernel. 4953a28afca5SDavid A. Long 4954eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4955eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4956eea63e05SSimon Glass defined. 4957eea63e05SSimon Glass 495817ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 495917ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 496017ea1177Swdenk mode (400kHZ). This environment variable is used in 496117ea1177Swdenk initialization code. So, for changes to be effective 496217ea1177Swdenk it must be saved and board must be reset. 496317ea1177Swdenk 4964c609719bSwdenk initrd_high - restrict positioning of initrd images: 4965c609719bSwdenk If this variable is not set, initrd images will be 4966c609719bSwdenk copied to the highest possible address in RAM; this 4967c609719bSwdenk is usually what you want since it allows for 4968c609719bSwdenk maximum initrd size. If for some reason you want to 4969c609719bSwdenk make sure that the initrd image is loaded below the 49706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4971c609719bSwdenk variable to a value of "no" or "off" or "0". 4972c609719bSwdenk Alternatively, you can set it to a maximum upper 4973c609719bSwdenk address to use (U-Boot will still check that it 4974c609719bSwdenk does not overwrite the U-Boot stack and data). 4975c609719bSwdenk 4976c609719bSwdenk For instance, when you have a system with 16 MB 49777152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4978c609719bSwdenk you can do this by adding "mem=12M" to the value of 4979c609719bSwdenk the "bootargs" variable. However, now you must make 49807152b1d0Swdenk sure that the initrd image is placed in the first 4981c609719bSwdenk 12 MB as well - this can be done with 4982c609719bSwdenk 4983c609719bSwdenk setenv initrd_high 00c00000 4984c609719bSwdenk 498538b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 498638b99261Swdenk indication to U-Boot that all addresses are legal 498738b99261Swdenk for the Linux kernel, including addresses in flash 498838b99261Swdenk memory. In this case U-Boot will NOT COPY the 498938b99261Swdenk ramdisk at all. This may be useful to reduce the 499038b99261Swdenk boot time on your system, but requires that this 499138b99261Swdenk feature is supported by your Linux kernel. 499238b99261Swdenk 4993c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4994c609719bSwdenk 4995c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4996dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4997c609719bSwdenk 4998c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4999c609719bSwdenk 5000c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 5001c609719bSwdenk 5002c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 5003c609719bSwdenk 5004c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 5005c609719bSwdenk 5006c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 5007c609719bSwdenk 5008e2a53458SMike Frysinger ethprime - controls which interface is used first. 5009a3d991bdSwdenk 5010e2a53458SMike Frysinger ethact - controls which interface is currently active. 5011e2a53458SMike Frysinger For example you can do the following 5012a3d991bdSwdenk 501348690d80SHeiko Schocher => setenv ethact FEC 501448690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 501548690d80SHeiko Schocher => setenv ethact SCC 501648690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 5017a3d991bdSwdenk 5018e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 5019e1692577SMatthias Fuchs available network interfaces. 5020e1692577SMatthias Fuchs It just stays at the currently selected interface. 5021e1692577SMatthias Fuchs 5022a3d991bdSwdenk netretry - When set to "no" each network operation will 5023a3d991bdSwdenk either succeed or fail without retrying. 50246e592385Swdenk When set to "once" the network operation will 50256e592385Swdenk fail when all the available network interfaces 50266e592385Swdenk are tried once without success. 5027a3d991bdSwdenk Useful on scripts which control the retry operation 5028a3d991bdSwdenk themselves. 5029a3d991bdSwdenk 5030b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 5031a1cf027aSJean-Christophe PLAGNIOL-VILLARD 50328d51aacdSSimon Glass silent_linux - If set then linux will be told to boot silently, by 50338d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 50348d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 50358d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 50368d51aacdSSimon Glass is silent. 50378d51aacdSSimon Glass 503828cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 5039ecb0ccd9SWolfgang Denk UDP source port. 5040ecb0ccd9SWolfgang Denk 504128cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 504228cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 504328cb9375SWolfgang Denk 5044c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 5045c96f86eeSWolfgang Denk we use the TFTP server's default block size 5046c96f86eeSWolfgang Denk 5047c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 5048c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 5049c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 5050c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 5051c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 5052c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 5053c96f86eeSWolfgang Denk with unreliable TFTP servers. 5054c96f86eeSWolfgang Denk 5055a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 505611ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 5057a3d991bdSwdenk VLAN tagged frames. 5058c609719bSwdenk 5059dc0b7b0eSJason HobbsThe following image location variables contain the location of images 5060dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 5061dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 5062dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 5063dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 5064dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 5065dc0b7b0eSJason Hobbsflash or offset in NAND flash. 5066dc0b7b0eSJason Hobbs 5067dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 5068dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 5069dc0b7b0eSJason Hobbsboards use these variables for other purposes. 5070dc0b7b0eSJason Hobbs 5071dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 5072dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 5073dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 5074dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 5075dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 5076dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 5077dc0b7b0eSJason Hobbs 5078c609719bSwdenkThe following environment variables may be used and automatically 5079c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 5080c609719bSwdenkdepending the information provided by your boot server: 5081c609719bSwdenk 5082c609719bSwdenk bootfile - see above 5083c609719bSwdenk dnsip - IP address of your Domain Name Server 5084fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 5085c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 5086c609719bSwdenk hostname - Target hostname 5087c609719bSwdenk ipaddr - see above 5088c609719bSwdenk netmask - Subnet Mask 5089c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 5090c609719bSwdenk serverip - see above 5091c609719bSwdenk 5092c609719bSwdenk 5093c609719bSwdenkThere are two special Environment Variables: 5094c609719bSwdenk 5095c609719bSwdenk serial# - contains hardware identification information such 5096c609719bSwdenk as type string and/or serial number 5097c609719bSwdenk ethaddr - Ethernet address 5098c609719bSwdenk 5099c609719bSwdenkThese variables can be set only once (usually during manufacturing of 5100c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 5101c609719bSwdenkonce they have been set once. 5102c609719bSwdenk 5103c609719bSwdenk 5104c1551ea8SstroeseFurther special Environment Variables: 5105c1551ea8Sstroese 5106c1551ea8Sstroese ver - Contains the U-Boot version string as printed 5107c1551ea8Sstroese with the "version" command. This variable is 5108c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 5109c1551ea8Sstroese 5110c1551ea8Sstroese 5111c609719bSwdenkPlease note that changes to some configuration parameters may take 5112c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 5113c609719bSwdenk 5114c609719bSwdenk 5115170ab110SJoe HershbergerCallback functions for environment variables: 5116170ab110SJoe Hershberger--------------------------------------------- 5117170ab110SJoe Hershberger 5118170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 5119170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 5120170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 5121170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 5122170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 5123170ab110SJoe Hershberger 5124170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 5125170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 5126170ab110SJoe Hershberger 5127170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 5128170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 5129170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 5130170ab110SJoe Hershbergerassociations. The list must be in the following format: 5131170ab110SJoe Hershberger 5132170ab110SJoe Hershberger entry = variable_name[:callback_name] 5133170ab110SJoe Hershberger list = entry[,list] 5134170ab110SJoe Hershberger 5135170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 5136170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 5137170ab110SJoe Hershberger 5138170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 5139170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 5140170ab110SJoe Hershbergeroverride any association in the static list. You can define 5141170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 5142170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 5143170ab110SJoe Hershberger 5144170ab110SJoe Hershberger 5145f07771ccSwdenkCommand Line Parsing: 5146f07771ccSwdenk===================== 5147f07771ccSwdenk 5148f07771ccSwdenkThere are two different command line parsers available with U-Boot: 51497152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 5150f07771ccSwdenk 5151f07771ccSwdenkOld, simple command line parser: 5152f07771ccSwdenk-------------------------------- 5153f07771ccSwdenk 5154f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 5155f07771ccSwdenk- several commands on one line, separated by ';' 5156fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 5157f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 5158f07771ccSwdenk for example: 5159fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 5160f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 5161f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 5162f07771ccSwdenk 5163f07771ccSwdenkHush shell: 5164f07771ccSwdenk----------- 5165f07771ccSwdenk 5166f07771ccSwdenk- similar to Bourne shell, with control structures like 5167f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 5168f07771ccSwdenk until...do...done, ... 5169f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 5170f07771ccSwdenk commands) and local shell variables (through standard shell syntax 5171f07771ccSwdenk "name=value"); only environment variables can be used with "run" 5172f07771ccSwdenk command 5173f07771ccSwdenk 5174f07771ccSwdenkGeneral rules: 5175f07771ccSwdenk-------------- 5176f07771ccSwdenk 5177f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 5178f07771ccSwdenk command) contains several commands separated by semicolon, and 5179f07771ccSwdenk one of these commands fails, then the remaining commands will be 5180f07771ccSwdenk executed anyway. 5181f07771ccSwdenk 5182f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 518311ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 5184f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 5185f07771ccSwdenk variables are not executed. 5186f07771ccSwdenk 5187c609719bSwdenkNote for Redundant Ethernet Interfaces: 5188c609719bSwdenk======================================= 5189c609719bSwdenk 519011ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 5191c609719bSwdenksuch configurations and is capable of automatic selection of a 51927152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 5193c609719bSwdenk 5194c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 5195c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 5196c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 5197c609719bSwdenk 5198c609719bSwdenkIf the network interface stores some valid MAC address (for instance 5199c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 5200c609719bSwdenkding setting in the environment; if the corresponding environment 5201c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 5202c609719bSwdenk 5203c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 5204c609719bSwdenk environment, the SROM's address is used. 5205c609719bSwdenk 5206c609719bSwdenko If there is no valid address in the SROM, and a definition in the 5207c609719bSwdenk environment exists, then the value from the environment variable is 5208c609719bSwdenk used. 5209c609719bSwdenk 5210c609719bSwdenko If both the SROM and the environment contain a MAC address, and 5211c609719bSwdenk both addresses are the same, this MAC address is used. 5212c609719bSwdenk 5213c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 5214c609719bSwdenk addresses differ, the value from the environment is used and a 5215c609719bSwdenk warning is printed. 5216c609719bSwdenk 5217c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 5218c609719bSwdenk is raised. 5219c609719bSwdenk 5220ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 5221ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 5222ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 5223ecee9324SBen WarrenThe naming convention is as follows: 5224ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 5225c609719bSwdenk 5226c609719bSwdenkImage Formats: 5227c609719bSwdenk============== 5228c609719bSwdenk 52293310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 52303310c549SMarian Balakowiczimages in two formats: 52313310c549SMarian Balakowicz 52323310c549SMarian BalakowiczNew uImage format (FIT) 52333310c549SMarian Balakowicz----------------------- 52343310c549SMarian Balakowicz 52353310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 52363310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 52373310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 52383310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 52393310c549SMarian Balakowicz 52403310c549SMarian Balakowicz 52413310c549SMarian BalakowiczOld uImage format 52423310c549SMarian Balakowicz----------------- 52433310c549SMarian Balakowicz 52443310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 52453310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 52463310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 5247c609719bSwdenk 5248c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 5249c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 5250f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 5251f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 5252f5ed9e39SPeter Tyser INTEGRITY). 52537b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 5254afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 5255afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 5256c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 5257c609719bSwdenk* Load Address 5258c609719bSwdenk* Entry Point 5259c609719bSwdenk* Image Name 5260c609719bSwdenk* Image Timestamp 5261c609719bSwdenk 5262c609719bSwdenkThe header is marked by a special Magic Number, and both the header 5263c609719bSwdenkand the data portions of the image are secured against corruption by 5264c609719bSwdenkCRC32 checksums. 5265c609719bSwdenk 5266c609719bSwdenk 5267c609719bSwdenkLinux Support: 5268c609719bSwdenk============== 5269c609719bSwdenk 5270c609719bSwdenkAlthough U-Boot should support any OS or standalone application 52717152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 5272c609719bSwdenkU-Boot. 5273c609719bSwdenk 5274c609719bSwdenkU-Boot includes many features that so far have been part of some 5275c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 5276c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 5277c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 52787152b1d0Swdenkserves several purposes: 5279c609719bSwdenk 5280c609719bSwdenk- the same features can be used for other OS or standalone 5281c609719bSwdenk applications (for instance: using compressed images to reduce the 5282c609719bSwdenk Flash memory footprint) 5283c609719bSwdenk 5284c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 52857152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 5286c609719bSwdenk 5287c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 5288c609719bSwdenk images; of course this also means that different kernel images can 5289c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 5290c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 5291c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 5292c609719bSwdenk software is easier now. 5293c609719bSwdenk 5294c609719bSwdenk 5295c609719bSwdenkLinux HOWTO: 5296c609719bSwdenk============ 5297c609719bSwdenk 5298c609719bSwdenkPorting Linux to U-Boot based systems: 5299c609719bSwdenk--------------------------------------- 5300c609719bSwdenk 5301c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 5302c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 5303c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 5304c609719bSwdenkLinux :-). 5305c609719bSwdenk 5306a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 5307c609719bSwdenk 5308c609719bSwdenkJust make sure your machine specific header file (for instance 5309c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 53101dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 53111dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 53126d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 5313c609719bSwdenk 5314c609719bSwdenk 5315c609719bSwdenkConfiguring the Linux kernel: 5316c609719bSwdenk----------------------------- 5317c609719bSwdenk 5318c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 5319c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 5320c609719bSwdenk 5321c609719bSwdenk 5322c609719bSwdenkBuilding a Linux Image: 5323c609719bSwdenk----------------------- 5324c609719bSwdenk 532524ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 532624ee89b9Swdenknot used. If you use recent kernel source, a new build target 532724ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 532824ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 532924ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 533024ee89b9Swdenk100% compatible format. 5331c609719bSwdenk 5332c609719bSwdenkExample: 5333c609719bSwdenk 5334c609719bSwdenk make TQM850L_config 5335c609719bSwdenk make oldconfig 5336c609719bSwdenk make dep 533724ee89b9Swdenk make uImage 5338c609719bSwdenk 533924ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 534024ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 534124ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 5342c609719bSwdenk 534324ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 534424ee89b9Swdenk 534524ee89b9Swdenk* convert the kernel into a raw binary image: 534624ee89b9Swdenk 534724ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 534824ee89b9Swdenk -R .note -R .comment \ 534924ee89b9Swdenk -S vmlinux linux.bin 535024ee89b9Swdenk 535124ee89b9Swdenk* compress the binary image: 535224ee89b9Swdenk 535324ee89b9Swdenk gzip -9 linux.bin 535424ee89b9Swdenk 535524ee89b9Swdenk* package compressed binary image for U-Boot: 535624ee89b9Swdenk 535724ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 535824ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 535924ee89b9Swdenk -d linux.bin.gz uImage 536024ee89b9Swdenk 536124ee89b9Swdenk 536224ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 536324ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 536424ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 536524ee89b9Swdenkbyte header containing information about target architecture, 536624ee89b9Swdenkoperating system, image type, compression method, entry points, time 536724ee89b9Swdenkstamp, CRC32 checksums, etc. 536824ee89b9Swdenk 536924ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 537024ee89b9Swdenkprint the header information, or to build new images. 5371c609719bSwdenk 5372c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 5373c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 5374c609719bSwdenkchecksum verification: 5375c609719bSwdenk 5376c609719bSwdenk tools/mkimage -l image 5377c609719bSwdenk -l ==> list image header information 5378c609719bSwdenk 5379c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 5380c609719bSwdenkfrom a "data file" which is used as image payload: 5381c609719bSwdenk 5382c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 5383c609719bSwdenk -n name -d data_file image 5384c609719bSwdenk -A ==> set architecture to 'arch' 5385c609719bSwdenk -O ==> set operating system to 'os' 5386c609719bSwdenk -T ==> set image type to 'type' 5387c609719bSwdenk -C ==> set compression type 'comp' 5388c609719bSwdenk -a ==> set load address to 'addr' (hex) 5389c609719bSwdenk -e ==> set entry point to 'ep' (hex) 5390c609719bSwdenk -n ==> set image name to 'name' 5391c609719bSwdenk -d ==> use image data from 'datafile' 5392c609719bSwdenk 539369459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 539469459791Swdenkaddress (0x00000000), but the entry point address depends on the 539569459791Swdenkkernel version: 5396c609719bSwdenk 5397c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 539824ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 5399c609719bSwdenk 5400c609719bSwdenkSo a typical call to build a U-Boot image would read: 5401c609719bSwdenk 540224ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 540324ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 5404a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 540524ee89b9Swdenk > examples/uImage.TQM850L 540624ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5407c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5408c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5409c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5410c609719bSwdenk Load Address: 0x00000000 541124ee89b9Swdenk Entry Point: 0x00000000 5412c609719bSwdenk 5413c609719bSwdenkTo verify the contents of the image (or check for corruption): 5414c609719bSwdenk 541524ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 541624ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5417c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5418c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5419c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 5420c609719bSwdenk Load Address: 0x00000000 542124ee89b9Swdenk Entry Point: 0x00000000 5422c609719bSwdenk 5423c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 5424c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 5425c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 5426c609719bSwdenkneed to be uncompressed: 5427c609719bSwdenk 5428a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 542924ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 543024ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 5431a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 543224ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 543324ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 5434c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 5435c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 5436c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 5437c609719bSwdenk Load Address: 0x00000000 543824ee89b9Swdenk Entry Point: 0x00000000 5439c609719bSwdenk 5440c609719bSwdenk 5441c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 5442c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 5443c609719bSwdenk 5444c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 5445c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 5446c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 5447c609719bSwdenk Image Name: Simple Ramdisk Image 5448c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 5449c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5450c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 5451c609719bSwdenk Load Address: 0x00000000 5452c609719bSwdenk Entry Point: 0x00000000 5453c609719bSwdenk 5454a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 5455a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 5456a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 5457a804b5ceSGuilherme Maciel Ferreirafrom the image: 5458a804b5ceSGuilherme Maciel Ferreira 5459a804b5ceSGuilherme Maciel Ferreira tools/dumpimage -i image -p position data_file 5460a804b5ceSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file', \ 5461a804b5ceSGuilherme Maciel Ferreira indexed by 'position' 5462a804b5ceSGuilherme Maciel Ferreira 5463c609719bSwdenk 5464c609719bSwdenkInstalling a Linux Image: 5465c609719bSwdenk------------------------- 5466c609719bSwdenk 5467c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 5468c609719bSwdenkyou must convert the image to S-Record format: 5469c609719bSwdenk 5470c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 5471c609719bSwdenk 5472c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 5473c609719bSwdenkimage header, so the resulting S-Record file will be relative to 5474c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 5475c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 5476c609719bSwdenkcommand. 5477c609719bSwdenk 5478c609719bSwdenkExample: install the image to address 0x40100000 (which on the 5479c609719bSwdenkTQM8xxL is in the first Flash bank): 5480c609719bSwdenk 5481c609719bSwdenk => erase 40100000 401FFFFF 5482c609719bSwdenk 5483c609719bSwdenk .......... done 5484c609719bSwdenk Erased 8 sectors 5485c609719bSwdenk 5486c609719bSwdenk => loads 40100000 5487c609719bSwdenk ## Ready for S-Record download ... 5488c609719bSwdenk ~>examples/image.srec 5489c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 5490c609719bSwdenk ... 5491c609719bSwdenk 15989 15990 15991 15992 5492c609719bSwdenk [file transfer complete] 5493c609719bSwdenk [connected] 5494c609719bSwdenk ## Start Addr = 0x00000000 5495c609719bSwdenk 5496c609719bSwdenk 5497c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 5498c609719bSwdenkthis includes a checksum verification so you can be sure no data 5499c609719bSwdenkcorruption happened: 5500c609719bSwdenk 5501c609719bSwdenk => imi 40100000 5502c609719bSwdenk 5503c609719bSwdenk ## Checking Image at 40100000 ... 5504c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5505c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5506c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5507c609719bSwdenk Load Address: 00000000 5508c609719bSwdenk Entry Point: 0000000c 5509c609719bSwdenk Verifying Checksum ... OK 5510c609719bSwdenk 5511c609719bSwdenk 5512c609719bSwdenkBoot Linux: 5513c609719bSwdenk----------- 5514c609719bSwdenk 5515c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 5516c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 5517c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 5518c609719bSwdenkparameters. You can check and modify this variable using the 5519c609719bSwdenk"printenv" and "setenv" commands: 5520c609719bSwdenk 5521c609719bSwdenk 5522c609719bSwdenk => printenv bootargs 5523c609719bSwdenk bootargs=root=/dev/ram 5524c609719bSwdenk 5525c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5526c609719bSwdenk 5527c609719bSwdenk => printenv bootargs 5528c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5529c609719bSwdenk 5530c609719bSwdenk => bootm 40020000 5531c609719bSwdenk ## Booting Linux kernel at 40020000 ... 5532c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 5533c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5534c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 5535c609719bSwdenk Load Address: 00000000 5536c609719bSwdenk Entry Point: 0000000c 5537c609719bSwdenk Verifying Checksum ... OK 5538c609719bSwdenk Uncompressing Kernel Image ... OK 5539c609719bSwdenk 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 5540c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 5541c609719bSwdenk time_init: decrementer frequency = 187500000/60 5542c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5543c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 5544c609719bSwdenk ... 5545c609719bSwdenk 554611ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 55477152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 5548c609719bSwdenkformat!) to the "bootm" command: 5549c609719bSwdenk 5550c609719bSwdenk => imi 40100000 40200000 5551c609719bSwdenk 5552c609719bSwdenk ## Checking Image at 40100000 ... 5553c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5554c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5555c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5556c609719bSwdenk Load Address: 00000000 5557c609719bSwdenk Entry Point: 0000000c 5558c609719bSwdenk Verifying Checksum ... OK 5559c609719bSwdenk 5560c609719bSwdenk ## Checking Image at 40200000 ... 5561c609719bSwdenk Image Name: Simple Ramdisk Image 5562c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5563c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5564c609719bSwdenk Load Address: 00000000 5565c609719bSwdenk Entry Point: 00000000 5566c609719bSwdenk Verifying Checksum ... OK 5567c609719bSwdenk 5568c609719bSwdenk => bootm 40100000 40200000 5569c609719bSwdenk ## Booting Linux kernel at 40100000 ... 5570c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 5571c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 5572c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 5573c609719bSwdenk Load Address: 00000000 5574c609719bSwdenk Entry Point: 0000000c 5575c609719bSwdenk Verifying Checksum ... OK 5576c609719bSwdenk Uncompressing Kernel Image ... OK 5577c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 5578c609719bSwdenk Image Name: Simple Ramdisk Image 5579c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 5580c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 5581c609719bSwdenk Load Address: 00000000 5582c609719bSwdenk Entry Point: 00000000 5583c609719bSwdenk Verifying Checksum ... OK 5584c609719bSwdenk Loading Ramdisk ... OK 5585c609719bSwdenk 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 5586c609719bSwdenk Boot arguments: root=/dev/ram 5587c609719bSwdenk time_init: decrementer frequency = 187500000/60 5588c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 5589c609719bSwdenk ... 5590c609719bSwdenk RAMDISK: Compressed image found at block 0 5591c609719bSwdenk VFS: Mounted root (ext2 filesystem). 5592c609719bSwdenk 5593c609719bSwdenk bash# 5594c609719bSwdenk 55950267768eSMatthew McClintockBoot Linux and pass a flat device tree: 55960267768eSMatthew McClintock----------- 55970267768eSMatthew McClintock 55980267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 55990267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 56000267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 56010267768eSMatthew McClintockflat device tree: 56020267768eSMatthew McClintock 56030267768eSMatthew McClintock=> print oftaddr 56040267768eSMatthew McClintockoftaddr=0x300000 56050267768eSMatthew McClintock=> print oft 56060267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 56070267768eSMatthew McClintock=> tftp $oftaddr $oft 56080267768eSMatthew McClintockSpeed: 1000, full duplex 56090267768eSMatthew McClintockUsing TSEC0 device 56100267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 56110267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 56120267768eSMatthew McClintockLoad address: 0x300000 56130267768eSMatthew McClintockLoading: # 56140267768eSMatthew McClintockdone 56150267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 56160267768eSMatthew McClintock=> tftp $loadaddr $bootfile 56170267768eSMatthew McClintockSpeed: 1000, full duplex 56180267768eSMatthew McClintockUsing TSEC0 device 56190267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 56200267768eSMatthew McClintockFilename 'uImage'. 56210267768eSMatthew McClintockLoad address: 0x200000 56220267768eSMatthew McClintockLoading:############ 56230267768eSMatthew McClintockdone 56240267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 56250267768eSMatthew McClintock=> print loadaddr 56260267768eSMatthew McClintockloadaddr=200000 56270267768eSMatthew McClintock=> print oftaddr 56280267768eSMatthew McClintockoftaddr=0x300000 56290267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 56300267768eSMatthew McClintock## Booting image at 00200000 ... 56310267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 56320267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 56330267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 56340267768eSMatthew McClintock Load Address: 00000000 56350267768eSMatthew McClintock Entry Point: 00000000 56360267768eSMatthew McClintock Verifying Checksum ... OK 56370267768eSMatthew McClintock Uncompressing Kernel Image ... OK 56380267768eSMatthew McClintockBooting using flat device tree at 0x300000 56390267768eSMatthew McClintockUsing MPC85xx ADS machine description 56400267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 56410267768eSMatthew McClintock[snip] 56420267768eSMatthew McClintock 56430267768eSMatthew McClintock 56446069ff26SwdenkMore About U-Boot Image Types: 56456069ff26Swdenk------------------------------ 56466069ff26Swdenk 56476069ff26SwdenkU-Boot supports the following image types: 56486069ff26Swdenk 56496069ff26Swdenk "Standalone Programs" are directly runnable in the environment 56506069ff26Swdenk provided by U-Boot; it is expected that (if they behave 56516069ff26Swdenk well) you can continue to work in U-Boot after return from 56526069ff26Swdenk the Standalone Program. 56536069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 56546069ff26Swdenk will take over control completely. Usually these programs 56556069ff26Swdenk will install their own set of exception handlers, device 56566069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 56576069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 56586069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 56596069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 56606069ff26Swdenk being started. 56616069ff26Swdenk "Multi-File Images" contain several images, typically an OS 56626069ff26Swdenk (Linux) kernel image and one or more data images like 56636069ff26Swdenk RAMDisks. This construct is useful for instance when you want 56646069ff26Swdenk to boot over the network using BOOTP etc., where the boot 56656069ff26Swdenk server provides just a single image file, but you want to get 56666069ff26Swdenk for instance an OS kernel and a RAMDisk image. 56676069ff26Swdenk 56686069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 56696069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 56706069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 56716069ff26Swdenk Immediately after the terminating 0 follow the images, one by 56726069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 56736069ff26Swdenk a multiple of 4 bytes). 56746069ff26Swdenk 56756069ff26Swdenk "Firmware Images" are binary images containing firmware (like 56766069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 56776069ff26Swdenk flash memory. 56786069ff26Swdenk 56796069ff26Swdenk "Script files" are command sequences that will be executed by 56806069ff26Swdenk U-Boot's command interpreter; this feature is especially 56816069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 56826069ff26Swdenk as command interpreter. 56836069ff26Swdenk 568444f074c7SMarek VasutBooting the Linux zImage: 568544f074c7SMarek Vasut------------------------- 568644f074c7SMarek Vasut 568744f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 568844f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 568944f074c7SMarek Vasutas the syntax of "bootm" command. 569044f074c7SMarek Vasut 56918ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 5692017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 5693017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 5694017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 5695017e1f3fSMarek Vasut 5696c609719bSwdenk 5697c609719bSwdenkStandalone HOWTO: 5698c609719bSwdenk================= 5699c609719bSwdenk 5700c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 5701c609719bSwdenkrun "standalone" applications, which can use some resources of 5702c609719bSwdenkU-Boot like console I/O functions or interrupt services. 5703c609719bSwdenk 5704c609719bSwdenkTwo simple examples are included with the sources: 5705c609719bSwdenk 5706c609719bSwdenk"Hello World" Demo: 5707c609719bSwdenk------------------- 5708c609719bSwdenk 5709c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 5710c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 5711c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 5712c609719bSwdenklike that: 5713c609719bSwdenk 5714c609719bSwdenk => loads 5715c609719bSwdenk ## Ready for S-Record download ... 5716c609719bSwdenk ~>examples/hello_world.srec 5717c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5718c609719bSwdenk [file transfer complete] 5719c609719bSwdenk [connected] 5720c609719bSwdenk ## Start Addr = 0x00040004 5721c609719bSwdenk 5722c609719bSwdenk => go 40004 Hello World! This is a test. 5723c609719bSwdenk ## Starting application at 0x00040004 ... 5724c609719bSwdenk Hello World 5725c609719bSwdenk argc = 7 5726c609719bSwdenk argv[0] = "40004" 5727c609719bSwdenk argv[1] = "Hello" 5728c609719bSwdenk argv[2] = "World!" 5729c609719bSwdenk argv[3] = "This" 5730c609719bSwdenk argv[4] = "is" 5731c609719bSwdenk argv[5] = "a" 5732c609719bSwdenk argv[6] = "test." 5733c609719bSwdenk argv[7] = "<NULL>" 5734c609719bSwdenk Hit any key to exit ... 5735c609719bSwdenk 5736c609719bSwdenk ## Application terminated, rc = 0x0 5737c609719bSwdenk 5738c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 5739c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 5740c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 5741c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 5742c609719bSwdenkcharacter, but this is just a demo program. The application can be 5743c609719bSwdenkcontrolled by the following keys: 5744c609719bSwdenk 5745c609719bSwdenk ? - print current values og the CPM Timer registers 5746c609719bSwdenk b - enable interrupts and start timer 5747c609719bSwdenk e - stop timer and disable interrupts 5748c609719bSwdenk q - quit application 5749c609719bSwdenk 5750c609719bSwdenk => loads 5751c609719bSwdenk ## Ready for S-Record download ... 5752c609719bSwdenk ~>examples/timer.srec 5753c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 5754c609719bSwdenk [file transfer complete] 5755c609719bSwdenk [connected] 5756c609719bSwdenk ## Start Addr = 0x00040004 5757c609719bSwdenk 5758c609719bSwdenk => go 40004 5759c609719bSwdenk ## Starting application at 0x00040004 ... 5760c609719bSwdenk TIMERS=0xfff00980 5761c609719bSwdenk Using timer 1 5762c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 5763c609719bSwdenk 5764c609719bSwdenkHit 'b': 5765c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 5766c609719bSwdenk Enabling timer 5767c609719bSwdenkHit '?': 5768c609719bSwdenk [q, b, e, ?] ........ 5769c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 5770c609719bSwdenkHit '?': 5771c609719bSwdenk [q, b, e, ?] . 5772c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 5773c609719bSwdenkHit '?': 5774c609719bSwdenk [q, b, e, ?] . 5775c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 5776c609719bSwdenkHit '?': 5777c609719bSwdenk [q, b, e, ?] . 5778c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 5779c609719bSwdenkHit 'e': 5780c609719bSwdenk [q, b, e, ?] ...Stopping timer 5781c609719bSwdenkHit 'q': 5782c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 5783c609719bSwdenk 5784c609719bSwdenk 578585ec0bccSwdenkMinicom warning: 578685ec0bccSwdenk================ 578785ec0bccSwdenk 57887152b1d0SwdenkOver time, many people have reported problems when trying to use the 578985ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 579085ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 5791f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 579285ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 5793e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 5794e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 5795e53515a2SKarl O. Pincfor help with kermit. 5796e53515a2SKarl O. Pinc 579785ec0bccSwdenk 579852f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 579952f52c14Swdenkconfiguration to your "File transfer protocols" section: 580052f52c14Swdenk 580152f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 580252f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 580352f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 580452f52c14Swdenk 580552f52c14Swdenk 5806c609719bSwdenkNetBSD Notes: 5807c609719bSwdenk============= 5808c609719bSwdenk 5809c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5810c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5811c609719bSwdenk 5812c609719bSwdenkBuilding requires a cross environment; it is known to work on 5813c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5814c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5815c609719bSwdenkNote that the cross-powerpc package does not install include files; 5816c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5817c609719bSwdenkmissing. This file has to be installed and patched manually: 5818c609719bSwdenk 5819c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5820c609719bSwdenk # mkdir powerpc 5821c609719bSwdenk # ln -s powerpc machine 5822c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5823c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5824c609719bSwdenk 5825c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5826c609719bSwdenkand U-Boot include files. 5827c609719bSwdenk 5828c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5829c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5830c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5831c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 58322a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5833c609719bSwdenk 5834c609719bSwdenk 5835c609719bSwdenkImplementation Internals: 5836c609719bSwdenk========================= 5837c609719bSwdenk 5838c609719bSwdenkThe following is not intended to be a complete description of every 5839c609719bSwdenkimplementation detail. However, it should help to understand the 5840c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5841c609719bSwdenkhardware. 5842c609719bSwdenk 5843c609719bSwdenk 5844c609719bSwdenkInitial Stack, Global Data: 5845c609719bSwdenk--------------------------- 5846c609719bSwdenk 5847c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5848c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5849c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5850c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5851c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5852c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5853c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5854c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5855c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5856c609719bSwdenklocked as (mis-) used as memory, etc. 5857c609719bSwdenk 58587152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 58590668236bSWolfgang Denk U-Boot mailing list: 586043d9616cSwdenk 586143d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 586243d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 586343d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 586443d9616cSwdenk ... 586543d9616cSwdenk 586643d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 586743d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 586843d9616cSwdenk require any physical RAM backing up the cache. The cleverness 586943d9616cSwdenk is that the cache is being used as a temporary supply of 587043d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 587111ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 587243d9616cSwdenk can see how this works by studying the cache architecture and 587343d9616cSwdenk operation in the architecture and processor-specific manuals. 587443d9616cSwdenk 587543d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 587643d9616cSwdenk is another option for the system designer to use as an 587711ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 587843d9616cSwdenk option should work for you. Using CS 4 should be fine if your 587943d9616cSwdenk board designers haven't used it for something that would 588043d9616cSwdenk cause you grief during the initial boot! It is frequently not 588143d9616cSwdenk used. 588243d9616cSwdenk 58836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 588443d9616cSwdenk with your processor/board/system design. The default value 588543d9616cSwdenk you will find in any recent u-boot distribution in 58868a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 588743d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 588843d9616cSwdenk it above 400_0000. Just make sure your board has no resources 588943d9616cSwdenk that are supposed to respond to that address! That code in 589043d9616cSwdenk start.S has been around a while and should work as is when 589143d9616cSwdenk you get the config right. 589243d9616cSwdenk 589343d9616cSwdenk -Chris Hallinan 589443d9616cSwdenk DS4.COM, Inc. 589543d9616cSwdenk 5896c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5897c609719bSwdenkcode for the initialization procedures: 5898c609719bSwdenk 5899c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5900c609719bSwdenk to write it. 5901c609719bSwdenk 590211ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5903c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 59047152b1d0Swdenk zation is performed later (when relocating to RAM). 5905c609719bSwdenk 5906c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5907c609719bSwdenk that. 5908c609719bSwdenk 5909c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5910c609719bSwdenknormal global data to share information beween the code. But it 5911c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5912c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5913c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5914c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5915c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5916c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5917c609719bSwdenkreserve for this purpose. 5918c609719bSwdenk 59197152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5920c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5921c609719bSwdenkGCC's implementation. 5922c609719bSwdenk 5923c609719bSwdenkFor PowerPC, the following registers have specific use: 5924c609719bSwdenk R1: stack pointer 5925e7670f6cSWolfgang Denk R2: reserved for system use 5926c609719bSwdenk R3-R4: parameter passing and return values 5927c609719bSwdenk R5-R10: parameter passing 5928c609719bSwdenk R13: small data area pointer 5929c609719bSwdenk R30: GOT pointer 5930c609719bSwdenk R31: frame pointer 5931c609719bSwdenk 5932e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5933e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5934e6bee808SJoakim Tjernlund going back and forth between asm and C) 5935c609719bSwdenk 5936e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5937c609719bSwdenk 5938c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5939c609719bSwdenk address of the global data structure is known at compile time), 5940c609719bSwdenk but it turned out that reserving a register results in somewhat 5941c609719bSwdenk smaller code - although the code savings are not that big (on 5942c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5943c609719bSwdenk 624 text + 127 data). 5944c609719bSwdenk 5945c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 59464c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 59474c58eb55SMike Frysinger 5948c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 59494c58eb55SMike Frysinger 5950c609719bSwdenkOn ARM, the following registers are used: 5951c609719bSwdenk 5952c609719bSwdenk R0: function argument word/integer result 5953c609719bSwdenk R1-R3: function argument word 595412eba1b4SJeroen Hofstee R9: platform specific 595512eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 5956c609719bSwdenk R11: argument (frame) pointer 5957c609719bSwdenk R12: temporary workspace 5958c609719bSwdenk R13: stack pointer 5959c609719bSwdenk R14: link register 5960c609719bSwdenk R15: program counter 5961c609719bSwdenk 596212eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 596312eba1b4SJeroen Hofstee 596412eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 5965c609719bSwdenk 59660df01fd3SThomas ChouOn Nios II, the ABI is documented here: 59670df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 59680df01fd3SThomas Chou 59690df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 59700df01fd3SThomas Chou 59710df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 59720df01fd3SThomas Chou to access small data sections, so gp is free. 59730df01fd3SThomas Chou 5974afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5975afc1ce82SMacpaul Lin 5976afc1ce82SMacpaul Lin R0-R1: argument/return 5977afc1ce82SMacpaul Lin R2-R5: argument 5978afc1ce82SMacpaul Lin R15: temporary register for assembler 5979afc1ce82SMacpaul Lin R16: trampoline register 5980afc1ce82SMacpaul Lin R28: frame pointer (FP) 5981afc1ce82SMacpaul Lin R29: global pointer (GP) 5982afc1ce82SMacpaul Lin R30: link register (LP) 5983afc1ce82SMacpaul Lin R31: stack pointer (SP) 5984afc1ce82SMacpaul Lin PC: program counter (PC) 5985afc1ce82SMacpaul Lin 5986afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5987afc1ce82SMacpaul Lin 5988d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5989d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5990c609719bSwdenk 5991c609719bSwdenkMemory Management: 5992c609719bSwdenk------------------ 5993c609719bSwdenk 5994c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5995c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5996c609719bSwdenk 5997c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5998c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5999c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 6000c609719bSwdenkphysical memory banks. 6001c609719bSwdenk 6002c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 6003c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 6004c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 6005c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 60066d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 6007c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 6008c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 6009c609719bSwdenk 6010c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 6011c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 6012c609719bSwdenk 6013c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 6014c609719bSwdenkthis: 6015c609719bSwdenk 6016c609719bSwdenk 0x0000 0000 Exception Vector code 6017c609719bSwdenk : 6018c609719bSwdenk 0x0000 1FFF 6019c609719bSwdenk 0x0000 2000 Free for Application Use 6020c609719bSwdenk : 6021c609719bSwdenk : 6022c609719bSwdenk 6023c609719bSwdenk : 6024c609719bSwdenk : 6025c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 6026c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 6027c609719bSwdenk 0x00FC 0000 Malloc Arena 6028c609719bSwdenk : 6029c609719bSwdenk 0x00FD FFFF 6030c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 6031c609719bSwdenk ... eventually: LCD or video framebuffer 6032c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 6033c609719bSwdenk 0x00FF FFFF [End of RAM] 6034c609719bSwdenk 6035c609719bSwdenk 6036c609719bSwdenkSystem Initialization: 6037c609719bSwdenk---------------------- 6038c609719bSwdenk 6039c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 604011ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 6041c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 60427152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 6043c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 6044c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 6045c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 6046c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 6047c609719bSwdenkthe caches and the SIU. 6048c609719bSwdenk 6049c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 6050c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 6051c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 6052c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 6053c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 6054c609719bSwdenksimple memory test is run that determines the size of the SDRAM 6055c609719bSwdenkbanks. 6056c609719bSwdenk 6057c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 60587152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 6059c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 6060c609719bSwdenk0x00000000, with any additional banks following immediately to create 6061c609719bSwdenkcontiguous memory starting from 0. 6062c609719bSwdenk 6063c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 6064c609719bSwdenkand allocates memory for use by malloc() and for the global Board 6065c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 6066c609719bSwdenkpages, and the final stack is set up. 6067c609719bSwdenk 6068c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 6069c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 6070c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 6071c609719bSwdenknew address in RAM. 6072c609719bSwdenk 6073c609719bSwdenk 6074c609719bSwdenkU-Boot Porting Guide: 6075c609719bSwdenk---------------------- 6076c609719bSwdenk 6077c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 60786aff3115Swdenklist, October 2002] 6079c609719bSwdenk 6080c609719bSwdenk 6081c609719bSwdenkint main(int argc, char *argv[]) 6082c609719bSwdenk{ 6083c609719bSwdenk sighandler_t no_more_time; 6084c609719bSwdenk 6085c609719bSwdenk signal(SIGALRM, no_more_time); 6086c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 6087c609719bSwdenk 6088c609719bSwdenk if (available_money > available_manpower) { 60896c3fef28SJerry Van Baren Pay consultant to port U-Boot; 6090c609719bSwdenk return 0; 6091c609719bSwdenk } 6092c609719bSwdenk 6093c609719bSwdenk Download latest U-Boot source; 6094c609719bSwdenk 60950668236bSWolfgang Denk Subscribe to u-boot mailing list; 60966aff3115Swdenk 60976c3fef28SJerry Van Baren if (clueless) 6098c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 6099c609719bSwdenk 6100c609719bSwdenk while (learning) { 6101c609719bSwdenk Read the README file in the top level directory; 61027cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 61036c3fef28SJerry Van Baren Read applicable doc/*.README; 6104c609719bSwdenk Read the source, Luke; 61056c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 6106c609719bSwdenk } 6107c609719bSwdenk 61086c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 61096c3fef28SJerry Van Baren Buy a BDI3000; 61106c3fef28SJerry Van Baren else 6111c609719bSwdenk Add a lot of aggravation and time; 6112c609719bSwdenk 61136c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 61146c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 61156c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 61166c3fef28SJerry Van Baren } else { 6117c609719bSwdenk Create your own board support subdirectory; 61186c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 61196c3fef28SJerry Van Baren } 61206c3fef28SJerry Van Baren Edit new board/<myboard> files 61216c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 6122c609719bSwdenk 61236c3fef28SJerry Van Baren while (!accepted) { 6124c609719bSwdenk while (!running) { 6125c609719bSwdenk do { 6126c609719bSwdenk Add / modify source code; 6127c609719bSwdenk } until (compiles); 6128c609719bSwdenk Debug; 6129c609719bSwdenk if (clueless) 6130c609719bSwdenk email("Hi, I am having problems..."); 6131c609719bSwdenk } 61326c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 61336c3fef28SJerry Van Baren if (reasonable critiques) 61346c3fef28SJerry Van Baren Incorporate improvements from email list code review; 61356c3fef28SJerry Van Baren else 61366c3fef28SJerry Van Baren Defend code as written; 61376c3fef28SJerry Van Baren } 6138c609719bSwdenk 6139c609719bSwdenk return 0; 6140c609719bSwdenk} 6141c609719bSwdenk 6142c609719bSwdenkvoid no_more_time (int sig) 6143c609719bSwdenk{ 6144c609719bSwdenk hire_a_guru(); 6145c609719bSwdenk} 6146c609719bSwdenk 6147c609719bSwdenk 6148c609719bSwdenkCoding Standards: 6149c609719bSwdenk----------------- 6150c609719bSwdenk 6151c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 61522c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 61537ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 6154c609719bSwdenk 61552c051651SDetlev ZundelSource files originating from a different project (for example the 61562c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 61572c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 61582c051651SDetlev Zundelsources. 61592c051651SDetlev Zundel 61602c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 61612c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 61622c051651SDetlev Zundelin your code. 6163c609719bSwdenk 6164c178d3daSwdenkPlease also stick to the following formatting rules: 6165180d3f74Swdenk- remove any trailing white space 61667ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 6167180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 61687ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 6169180d3f74Swdenk- do not add trailing empty lines to source files 6170180d3f74Swdenk 6171c609719bSwdenkSubmissions which do not conform to the standards may be returned 6172c609719bSwdenkwith a request to reformat the changes. 6173c609719bSwdenk 6174c609719bSwdenk 6175c609719bSwdenkSubmitting Patches: 6176c609719bSwdenk------------------- 6177c609719bSwdenk 6178c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 6179c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 6180c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 6181c609719bSwdenk 61820d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 6183218ca724SWolfgang Denk 61840668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 61850668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 61860668236bSWolfgang Denk 6187c609719bSwdenkWhen you send a patch, please include the following information with 6188c609719bSwdenkit: 6189c609719bSwdenk 6190c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 6191c609719bSwdenk this bug. Please try to include a way of demonstrating that the 6192c609719bSwdenk patch actually fixes something. 6193c609719bSwdenk 6194c609719bSwdenk* For new features: a description of the feature and your 6195c609719bSwdenk implementation. 6196c609719bSwdenk 6197c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 6198c609719bSwdenk 6199c609719bSwdenk* For major contributions, your entry to the CREDITS file 6200c609719bSwdenk 620127af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 620227af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 6203c609719bSwdenk 6204c609719bSwdenk* If your patch adds new configuration options, don't forget to 6205c609719bSwdenk document these in the README file. 6206c609719bSwdenk 6207218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 6208218ca724SWolfgang Denk recommended) you can easily generate the patch using the 62097ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 6210218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 6211218ca724SWolfgang Denk with some other mail clients. 6212c609719bSwdenk 6213218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 6214218ca724SWolfgang Denk diff does not support these options, then get the latest version of 6215218ca724SWolfgang Denk GNU diff. 62166dff5529Swdenk 6217218ca724SWolfgang Denk The current directory when running this command shall be the parent 6218218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 6219218ca724SWolfgang Denk your patch includes sufficient directory information for the 6220218ca724SWolfgang Denk affected files). 6221218ca724SWolfgang Denk 6222218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 6223218ca724SWolfgang Denk and compressed attachments must not be used. 6224c609719bSwdenk 622552f52c14Swdenk* If one logical set of modifications affects or creates several 622652f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 622752f52c14Swdenk 622852f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 622952f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 623052f52c14Swdenk 623152f52c14Swdenk 6232c609719bSwdenkNotes: 6233c609719bSwdenk 6234c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 6235c609719bSwdenk source tree and make sure that no errors or warnings are reported 6236c609719bSwdenk for any of the boards. 6237c609719bSwdenk 6238c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 6239c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 6240c609719bSwdenk returned with a request to re-formatting / split it. 6241c609719bSwdenk 6242c609719bSwdenk* If you modify existing code, make sure that your new code does not 6243c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 6244c609719bSwdenk When adding new features, these should compile conditionally only 6245c609719bSwdenk (using #ifdef), and the resulting code with the new feature 6246c609719bSwdenk disabled must not need more memory than the old code without your 6247c609719bSwdenk modification. 624890dc6704Swdenk 62490668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 62500668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 62510668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 62520668236bSWolfgang Denk bigger than the size limit should be avoided. 6253