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 377207b366SRobert P. J. DayIn case of problems see the CHANGELOG file to find out who contributed 387207b366SRobert P. J. Daythe specific port. In addition, there are various MAINTAINERS files 397207b366SRobert P. J. Dayscattered throughout the U-Boot source identifying the people or 407207b366SRobert P. J. Daycompanies responsible for various boards and subsystems. 41c609719bSwdenk 427207b366SRobert P. J. DayNote: As of August, 2010, there is no longer a CHANGELOG file in the 437207b366SRobert P. J. Dayactual U-Boot source tree; however, it can be created dynamically 447207b366SRobert P. J. Dayfrom the Git log using: 45adb9d851SRobert P. J. Day 46adb9d851SRobert P. J. Day make CHANGELOG 47adb9d851SRobert P. J. Day 48c609719bSwdenk 49c609719bSwdenkWhere to get help: 50c609719bSwdenk================== 51c609719bSwdenk 52c609719bSwdenkIn case you have questions about, problems with or contributions for 537207b366SRobert P. J. DayU-Boot, you should send a message to the U-Boot mailing list at 540c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 550c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 560c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 570c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 58c609719bSwdenk 59c609719bSwdenk 60218ca724SWolfgang DenkWhere to get source code: 61218ca724SWolfgang Denk========================= 62218ca724SWolfgang Denk 637207b366SRobert P. J. DayThe U-Boot source code is maintained in the Git repository at 64218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 65218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 66218ca724SWolfgang Denk 67218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 6811ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 69218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 70218ca724SWolfgang Denkdirectory. 71218ca724SWolfgang Denk 72d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 73218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 74218ca724SWolfgang Denk 75218ca724SWolfgang Denk 76c609719bSwdenkWhere we come from: 77c609719bSwdenk=================== 78c609719bSwdenk 79c609719bSwdenk- start from 8xxrom sources 8024ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 81c609719bSwdenk- clean up code 82c609719bSwdenk- make it easier to add custom boards 83c609719bSwdenk- make it possible to add other [PowerPC] CPUs 84c609719bSwdenk- extend functions, especially: 85c609719bSwdenk * Provide extended interface to Linux boot loader 86c609719bSwdenk * S-Record download 87c609719bSwdenk * network boot 8811ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 8924ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 90c609719bSwdenk- add other CPU families (starting with ARM) 9124ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 920d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 9324ee89b9Swdenk 9424ee89b9Swdenk 9524ee89b9SwdenkNames and Spelling: 9624ee89b9Swdenk=================== 9724ee89b9Swdenk 9824ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 9924ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 10024ee89b9Swdenkin source files etc.). Example: 10124ee89b9Swdenk 10224ee89b9Swdenk This is the README file for the U-Boot project. 10324ee89b9Swdenk 10424ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 10524ee89b9Swdenk 10624ee89b9Swdenk include/asm-ppc/u-boot.h 10724ee89b9Swdenk 10824ee89b9Swdenk #include <asm/u-boot.h> 10924ee89b9Swdenk 11024ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 11124ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 11224ee89b9Swdenk 11324ee89b9Swdenk U_BOOT_VERSION u_boot_logo 11424ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 115c609719bSwdenk 116c609719bSwdenk 11793f19cc0SwdenkVersioning: 11893f19cc0Swdenk=========== 11993f19cc0Swdenk 120360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 121360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 122360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 123360d883aSThomas Webernames consisting of the calendar year and month of the release date. 124360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 125360d883aSThomas Weberreleases in "stable" maintenance trees. 12693f19cc0Swdenk 127360d883aSThomas WeberExamples: 128360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 129360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 1300de21ecbSJelle van der Waa U-Boot v2010.09-rc1 - Release candidate 1 for September 2010 release 13193f19cc0Swdenk 13293f19cc0Swdenk 133c609719bSwdenkDirectory Hierarchy: 134c609719bSwdenk==================== 135c609719bSwdenk 1368d321b81SPeter Tyser/arch Architecture specific files 1376eae68e4SMasahiro Yamada /arc Files generic to ARC architecture 1388d321b81SPeter Tyser /arm Files generic to ARM architecture 1398d321b81SPeter Tyser /m68k Files generic to m68k architecture 1408d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1418d321b81SPeter Tyser /mips Files generic to MIPS architecture 142afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 1438d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 14433c7731bSRobert P. J. Day /openrisc Files generic to OpenRISC architecture 145a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1467207b366SRobert P. J. Day /sandbox Files generic to HW-independent "sandbox" 1478d321b81SPeter Tyser /sh Files generic to SH architecture 14833c7731bSRobert P. J. Day /x86 Files generic to x86 architecture 1498d321b81SPeter Tyser/api Machine/arch independent API for external apps 1508d321b81SPeter Tyser/board Board dependent files 151740f7e5cSXu Ziyuan/cmd U-Boot commands functions 1528d321b81SPeter Tyser/common Misc architecture independent functions 1537207b366SRobert P. J. Day/configs Board default configuration files 1548d321b81SPeter Tyser/disk Code for disk drive partition handling 1558d321b81SPeter Tyser/doc Documentation (don't expect too much) 1568d321b81SPeter Tyser/drivers Commonly used device drivers 15733c7731bSRobert P. J. Day/dts Contains Makefile for building internal U-Boot fdt. 1588d321b81SPeter Tyser/examples Example code for standalone applications, etc. 1598d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 1608d321b81SPeter Tyser/include Header Files 1617207b366SRobert P. J. Day/lib Library routines generic to all architectures 1627207b366SRobert P. J. Day/Licenses Various license files 1638d321b81SPeter Tyser/net Networking code 1648d321b81SPeter Tyser/post Power On Self Test 1657207b366SRobert P. J. Day/scripts Various build scripts and Makefiles 1667207b366SRobert P. J. Day/test Various unit test files 1678d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 168c609719bSwdenk 169c609719bSwdenkSoftware Configuration: 170c609719bSwdenk======================= 171c609719bSwdenk 172c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 173c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 174c609719bSwdenk 175c609719bSwdenkThere are two classes of configuration variables: 176c609719bSwdenk 177c609719bSwdenk* Configuration _OPTIONS_: 178c609719bSwdenk These are selectable by the user and have names beginning with 179c609719bSwdenk "CONFIG_". 180c609719bSwdenk 181c609719bSwdenk* Configuration _SETTINGS_: 182c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 183c609719bSwdenk you don't know what you're doing; they have names beginning with 1846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 185c609719bSwdenk 1867207b366SRobert P. J. DayPreviously, all configuration was done by hand, which involved creating 1877207b366SRobert P. J. Daysymbolic links and editing configuration files manually. More recently, 1887207b366SRobert P. J. DayU-Boot has added the Kbuild infrastructure used by the Linux kernel, 1897207b366SRobert P. J. Dayallowing you to use the "make menuconfig" command to configure your 1907207b366SRobert P. J. Daybuild. 191c609719bSwdenk 192c609719bSwdenk 193c609719bSwdenkSelection of Processor Architecture and Board Type: 194c609719bSwdenk--------------------------------------------------- 195c609719bSwdenk 196c609719bSwdenkFor all supported boards there are ready-to-use default 197ab584d67SHolger Freytherconfigurations available; just type "make <board_name>_defconfig". 198c609719bSwdenk 199c609719bSwdenkExample: For a TQM823L module type: 200c609719bSwdenk 201c609719bSwdenk cd u-boot 202ab584d67SHolger Freyther make TQM823L_defconfig 203c609719bSwdenk 2047207b366SRobert P. J. DayNote: If you're looking for the default configuration file for a board 2057207b366SRobert P. J. Dayyou're sure used to be there but is now missing, check the file 2067207b366SRobert P. J. Daydoc/README.scrapyard for a list of no longer supported boards. 207c609719bSwdenk 20875b3c3aaSSimon GlassSandbox Environment: 20975b3c3aaSSimon Glass-------------------- 21075b3c3aaSSimon Glass 21175b3c3aaSSimon GlassU-Boot can be built natively to run on a Linux host using the 'sandbox' 21275b3c3aaSSimon Glassboard. This allows feature development which is not board- or architecture- 21375b3c3aaSSimon Glassspecific to be undertaken on a native platform. The sandbox is also used to 21475b3c3aaSSimon Glassrun some of U-Boot's tests. 21575b3c3aaSSimon Glass 2166b1978f8SJagannadha Sutradharudu TekiSee board/sandbox/README.sandbox for more details. 21775b3c3aaSSimon Glass 21875b3c3aaSSimon Glass 219db910353SSimon GlassBoard Initialisation Flow: 220db910353SSimon Glass-------------------------- 221db910353SSimon Glass 222db910353SSimon GlassThis is the intended start-up flow for boards. This should apply for both 2237207b366SRobert P. J. DaySPL and U-Boot proper (i.e. they both follow the same rules). 224db910353SSimon Glass 2257207b366SRobert P. J. DayNote: "SPL" stands for "Secondary Program Loader," which is explained in 2267207b366SRobert P. J. Daymore detail later in this file. 2277207b366SRobert P. J. Day 2287207b366SRobert P. J. DayAt present, SPL mostly uses a separate code path, but the function names 2297207b366SRobert P. J. Dayand roles of each function are the same. Some boards or architectures 2307207b366SRobert P. J. Daymay not conform to this. At least most ARM boards which use 2317207b366SRobert P. J. DayCONFIG_SPL_FRAMEWORK conform to this. 2327207b366SRobert P. J. Day 2337207b366SRobert P. J. DayExecution typically starts with an architecture-specific (and possibly 2347207b366SRobert P. J. DayCPU-specific) start.S file, such as: 2357207b366SRobert P. J. Day 2367207b366SRobert P. J. Day - arch/arm/cpu/armv7/start.S 2377207b366SRobert P. J. Day - arch/powerpc/cpu/mpc83xx/start.S 2387207b366SRobert P. J. Day - arch/mips/cpu/start.S 2397207b366SRobert P. J. Day 2407207b366SRobert P. J. Dayand so on. From there, three functions are called; the purpose and 2417207b366SRobert P. J. Daylimitations of each of these functions are described below. 242db910353SSimon Glass 243db910353SSimon Glasslowlevel_init(): 244db910353SSimon Glass - purpose: essential init to permit execution to reach board_init_f() 245db910353SSimon Glass - no global_data or BSS 246db910353SSimon Glass - there is no stack (ARMv7 may have one but it will soon be removed) 247db910353SSimon Glass - must not set up SDRAM or use console 248db910353SSimon Glass - must only do the bare minimum to allow execution to continue to 249db910353SSimon Glass board_init_f() 250db910353SSimon Glass - this is almost never needed 251db910353SSimon Glass - return normally from this function 252db910353SSimon Glass 253db910353SSimon Glassboard_init_f(): 254db910353SSimon Glass - purpose: set up the machine ready for running board_init_r(): 255db910353SSimon Glass i.e. SDRAM and serial UART 256db910353SSimon Glass - global_data is available 257db910353SSimon Glass - stack is in SRAM 258db910353SSimon Glass - BSS is not available, so you cannot use global/static variables, 259db910353SSimon Glass only stack variables and global_data 260db910353SSimon Glass 261db910353SSimon Glass Non-SPL-specific notes: 262db910353SSimon Glass - dram_init() is called to set up DRAM. If already done in SPL this 263db910353SSimon Glass can do nothing 264db910353SSimon Glass 265db910353SSimon Glass SPL-specific notes: 266db910353SSimon Glass - you can override the entire board_init_f() function with your own 267db910353SSimon Glass version as needed. 268db910353SSimon Glass - preloader_console_init() can be called here in extremis 269db910353SSimon Glass - should set up SDRAM, and anything needed to make the UART work 270db910353SSimon Glass - these is no need to clear BSS, it will be done by crt0.S 271db910353SSimon Glass - must return normally from this function (don't call board_init_r() 272db910353SSimon Glass directly) 273db910353SSimon Glass 274db910353SSimon GlassHere the BSS is cleared. For SPL, if CONFIG_SPL_STACK_R is defined, then at 275db910353SSimon Glassthis point the stack and global_data are relocated to below 276db910353SSimon GlassCONFIG_SPL_STACK_R_ADDR. For non-SPL, U-Boot is relocated to run at the top of 277db910353SSimon Glassmemory. 278db910353SSimon Glass 279db910353SSimon Glassboard_init_r(): 280db910353SSimon Glass - purpose: main execution, common code 281db910353SSimon Glass - global_data is available 282db910353SSimon Glass - SDRAM is available 283db910353SSimon Glass - BSS is available, all static/global variables can be used 284db910353SSimon Glass - execution eventually continues to main_loop() 285db910353SSimon Glass 286db910353SSimon Glass Non-SPL-specific notes: 287db910353SSimon Glass - U-Boot is relocated to the top of memory and is now running from 288db910353SSimon Glass there. 289db910353SSimon Glass 290db910353SSimon Glass SPL-specific notes: 291db910353SSimon Glass - stack is optionally in SDRAM, if CONFIG_SPL_STACK_R is defined and 292db910353SSimon Glass CONFIG_SPL_STACK_R_ADDR points into SDRAM 293db910353SSimon Glass - preloader_console_init() can be called here - typically this is 2940680f1b1SLey Foon Tan done by selecting CONFIG_SPL_BOARD_INIT and then supplying a 295db910353SSimon Glass spl_board_init() function containing this call 296db910353SSimon Glass - loads U-Boot or (in falcon mode) Linux 297db910353SSimon Glass 298db910353SSimon Glass 299db910353SSimon Glass 300c609719bSwdenkConfiguration Options: 301c609719bSwdenk---------------------- 302c609719bSwdenk 303c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 304c609719bSwdenksuch information is kept in a configuration file 305c609719bSwdenk"include/configs/<board_name>.h". 306c609719bSwdenk 307c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 308c609719bSwdenk"include/configs/TQM823L.h". 309c609719bSwdenk 310c609719bSwdenk 3117f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 3127f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 3137f6c2cbcSwdenkbuild a config tool - later. 3147f6c2cbcSwdenk 31563b2316cSAshish Kumar- ARM Platform Bus Type(CCI): 31663b2316cSAshish Kumar CoreLink Cache Coherent Interconnect (CCI) is ARM BUS which 31763b2316cSAshish Kumar provides full cache coherency between two clusters of multi-core 31863b2316cSAshish Kumar CPUs and I/O coherency for devices and I/O masters 31963b2316cSAshish Kumar 32063b2316cSAshish Kumar CONFIG_SYS_FSL_HAS_CCI400 32163b2316cSAshish Kumar 32263b2316cSAshish Kumar Defined For SoC that has cache coherent interconnect 32363b2316cSAshish Kumar CCN-400 3247f6c2cbcSwdenk 325*c055cee1SAshish Kumar CONFIG_SYS_FSL_HAS_CCN504 326*c055cee1SAshish Kumar 327*c055cee1SAshish Kumar Defined for SoC that has cache coherent interconnect CCN-504 328*c055cee1SAshish Kumar 329c609719bSwdenkThe following options need to be configured: 330c609719bSwdenk 3312628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 332c609719bSwdenk 3332628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 3346ccec449SWolfgang Denk 335cf946c6dSLei Wen- Marvell Family Member 336cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 337cf946c6dSLei Wen multiple fs option at one time 338cf946c6dSLei Wen for marvell soc family 339cf946c6dSLei Wen 34066412c63SKumar Gala- 85xx CPU Options: 341ffd06e02SYork Sun CONFIG_SYS_PPC64 342ffd06e02SYork Sun 343ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 344ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 345ffd06e02SYork Sun compliance, among other possible reasons. 346ffd06e02SYork Sun 34766412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 34866412c63SKumar Gala 34966412c63SKumar Gala Defines the core time base clock divider ratio compared to the 35066412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 35166412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 35266412c63SKumar Gala 3538f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3548f29084aSKumar Gala 3558f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3568f29084aSKumar Gala tree nodes for the given platform. 3578f29084aSKumar Gala 35833eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 35933eee330SScott Wood 36033eee330SScott Wood Enables a workaround for erratum A004510. If set, 36133eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 36233eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 36333eee330SScott Wood 36433eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 36533eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 36633eee330SScott Wood 36733eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 36833eee330SScott Wood for which the A004510 workaround should be applied. 36933eee330SScott Wood 37033eee330SScott Wood The rest of SVR is either not relevant to the decision 37133eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 37233eee330SScott Wood p2041) or is implied by the build target, which controls 37333eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 37433eee330SScott Wood 37533eee330SScott Wood See Freescale App Note 4493 for more information about 37633eee330SScott Wood this erratum. 37733eee330SScott Wood 37874fa22edSPrabhakar Kushwaha CONFIG_A003399_NOR_WORKAROUND 37974fa22edSPrabhakar Kushwaha Enables a workaround for IFC erratum A003399. It is only 380b445bbb4SJeremiah Mahler required during NOR boot. 38174fa22edSPrabhakar Kushwaha 3829f074e67SPrabhakar Kushwaha CONFIG_A008044_WORKAROUND 3839f074e67SPrabhakar Kushwaha Enables a workaround for T1040/T1042 erratum A008044. It is only 384b445bbb4SJeremiah Mahler required during NAND boot and valid for Rev 1.0 SoC revision 3859f074e67SPrabhakar Kushwaha 38633eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 38733eee330SScott Wood 38833eee330SScott Wood This is the value to write into CCSR offset 0x18600 38933eee330SScott Wood according to the A004510 workaround. 39033eee330SScott Wood 39164501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_DDR_ADDR 39264501c66SPriyanka Jain This value denotes start offset of DDR memory which is 39364501c66SPriyanka Jain connected exclusively to the DSP cores. 39464501c66SPriyanka Jain 395765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_M2_RAM_ADDR 396765b0bdbSPriyanka Jain This value denotes start offset of M2 memory 397765b0bdbSPriyanka Jain which is directly connected to the DSP core. 398765b0bdbSPriyanka Jain 39964501c66SPriyanka Jain CONFIG_SYS_FSL_DSP_M3_RAM_ADDR 40064501c66SPriyanka Jain This value denotes start offset of M3 memory which is directly 40164501c66SPriyanka Jain connected to the DSP core. 40264501c66SPriyanka Jain 403765b0bdbSPriyanka Jain CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT 404765b0bdbSPriyanka Jain This value denotes start offset of DSP CCSR space. 405765b0bdbSPriyanka Jain 406b135991aSPriyanka Jain CONFIG_SYS_FSL_SINGLE_SOURCE_CLK 407b135991aSPriyanka Jain Single Source Clock is clocking mode present in some of FSL SoC's. 408b135991aSPriyanka Jain In this mode, a single differential clock is used to supply 409b135991aSPriyanka Jain clocks to the sysclock, ddrclock and usbclock. 410b135991aSPriyanka Jain 411fb4a2409SAneesh Bansal CONFIG_SYS_CPC_REINIT_F 412fb4a2409SAneesh Bansal This CONFIG is defined when the CPC is configured as SRAM at the 413a187559eSBin Meng time of U-Boot entry and is required to be re-initialized. 414fb4a2409SAneesh Bansal 415aade2004STang Yuantian CONFIG_DEEP_SLEEP 416b445bbb4SJeremiah Mahler Indicates this SoC supports deep sleep feature. If deep sleep is 417aade2004STang Yuantian supported, core will start to execute uboot when wakes up. 418aade2004STang Yuantian 4196cb461b4SDaniel Schwierzeck- Generic CPU options: 4206cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4216cb461b4SDaniel Schwierzeck 4226cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4236cb461b4SDaniel Schwierzeck values is arch specific. 4246cb461b4SDaniel Schwierzeck 4255614e71bSYork Sun CONFIG_SYS_FSL_DDR 4265614e71bSYork Sun Freescale DDR driver in use. This type of DDR controller is 4275614e71bSYork Sun found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core 4285614e71bSYork Sun SoCs. 4295614e71bSYork Sun 4305614e71bSYork Sun CONFIG_SYS_FSL_DDR_ADDR 4315614e71bSYork Sun Freescale DDR memory-mapped register base. 4325614e71bSYork Sun 4335614e71bSYork Sun CONFIG_SYS_FSL_DDR_EMU 4345614e71bSYork Sun Specify emulator support for DDR. Some DDR features such as 4355614e71bSYork Sun deskew training are not available. 4365614e71bSYork Sun 4375614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN1 4385614e71bSYork Sun Freescale DDR1 controller. 4395614e71bSYork Sun 4405614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN2 4415614e71bSYork Sun Freescale DDR2 controller. 4425614e71bSYork Sun 4435614e71bSYork Sun CONFIG_SYS_FSL_DDRC_GEN3 4445614e71bSYork Sun Freescale DDR3 controller. 4455614e71bSYork Sun 44634e026f9SYork Sun CONFIG_SYS_FSL_DDRC_GEN4 44734e026f9SYork Sun Freescale DDR4 controller. 44834e026f9SYork Sun 4499ac4ffbdSYork Sun CONFIG_SYS_FSL_DDRC_ARM_GEN3 4509ac4ffbdSYork Sun Freescale DDR3 controller for ARM-based SoCs. 4519ac4ffbdSYork Sun 4525614e71bSYork Sun CONFIG_SYS_FSL_DDR1 4535614e71bSYork Sun Board config to use DDR1. It can be enabled for SoCs with 4545614e71bSYork Sun Freescale DDR1 or DDR2 controllers, depending on the board 4555614e71bSYork Sun implemetation. 4565614e71bSYork Sun 4575614e71bSYork Sun CONFIG_SYS_FSL_DDR2 45862a3b7ddSRobert P. J. Day Board config to use DDR2. It can be enabled for SoCs with 4595614e71bSYork Sun Freescale DDR2 or DDR3 controllers, depending on the board 4605614e71bSYork Sun implementation. 4615614e71bSYork Sun 4625614e71bSYork Sun CONFIG_SYS_FSL_DDR3 4635614e71bSYork Sun Board config to use DDR3. It can be enabled for SoCs with 46434e026f9SYork Sun Freescale DDR3 or DDR3L controllers. 46534e026f9SYork Sun 46634e026f9SYork Sun CONFIG_SYS_FSL_DDR3L 46734e026f9SYork Sun Board config to use DDR3L. It can be enabled for SoCs with 46834e026f9SYork Sun DDR3L controllers. 46934e026f9SYork Sun 47034e026f9SYork Sun CONFIG_SYS_FSL_DDR4 47134e026f9SYork Sun Board config to use DDR4. It can be enabled for SoCs with 47234e026f9SYork Sun DDR4 controllers. 4735614e71bSYork Sun 4741b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_BE 4751b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Big Endian 4761b4175d6SPrabhakar Kushwaha 4771b4175d6SPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_LE 4781b4175d6SPrabhakar Kushwaha Defines the IFC controller register space as Little Endian 4791b4175d6SPrabhakar Kushwaha 4801c40707eSPrabhakar Kushwaha CONFIG_SYS_FSL_IFC_CLK_DIV 4811c40707eSPrabhakar Kushwaha Defines divider of platform clock(clock input to IFC controller). 4821c40707eSPrabhakar Kushwaha 483add63f94SPrabhakar Kushwaha CONFIG_SYS_FSL_LBC_CLK_DIV 484add63f94SPrabhakar Kushwaha Defines divider of platform clock(clock input to eLBC controller). 485add63f94SPrabhakar Kushwaha 486690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_PBI 487690e4258SPrabhakar Kushwaha It enables addition of RCW (Power on reset configuration) in built image. 488690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 489690e4258SPrabhakar Kushwaha 490690e4258SPrabhakar Kushwaha CONFIG_SYS_FSL_PBL_RCW 491690e4258SPrabhakar Kushwaha It adds PBI(pre-boot instructions) commands in u-boot build image. 492690e4258SPrabhakar Kushwaha PBI commands can be used to configure SoC before it starts the execution. 493690e4258SPrabhakar Kushwaha Please refer doc/README.pblimage for more details 494690e4258SPrabhakar Kushwaha 49589ad7be8SPrabhakar Kushwaha CONFIG_SPL_FSL_PBL 49689ad7be8SPrabhakar Kushwaha It adds a target to create boot binary having SPL binary in PBI format 49789ad7be8SPrabhakar Kushwaha concatenated with u-boot binary. 49889ad7be8SPrabhakar Kushwaha 4994e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_BE 5004e5b1bd0SYork Sun Defines the DDR controller register space as Big Endian 5014e5b1bd0SYork Sun 5024e5b1bd0SYork Sun CONFIG_SYS_FSL_DDR_LE 5034e5b1bd0SYork Sun Defines the DDR controller register space as Little Endian 5044e5b1bd0SYork Sun 5056b9e309aSYork Sun CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 5066b9e309aSYork Sun Physical address from the view of DDR controllers. It is the 5076b9e309aSYork Sun same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But 5086b9e309aSYork Sun it could be different for ARM SoCs. 5096b9e309aSYork Sun 5106b1e1254SYork Sun CONFIG_SYS_FSL_DDR_INTLV_256B 5116b1e1254SYork Sun DDR controller interleaving on 256-byte. This is a special 5126b1e1254SYork Sun interleaving mode, handled by Dickens for Freescale layerscape 5136b1e1254SYork Sun SoCs with ARM core. 5146b1e1254SYork Sun 5151d71efbbSYork Sun CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS 5161d71efbbSYork Sun Number of controllers used as main memory. 5171d71efbbSYork Sun 5181d71efbbSYork Sun CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS 5191d71efbbSYork Sun Number of controllers used for other than main memory. 5201d71efbbSYork Sun 52144937214SPrabhakar Kushwaha CONFIG_SYS_FSL_HAS_DP_DDR 52244937214SPrabhakar Kushwaha Defines the SoC has DP-DDR used for DPAA. 52344937214SPrabhakar Kushwaha 524028dbb8dSRuchika Gupta CONFIG_SYS_FSL_SEC_BE 525028dbb8dSRuchika Gupta Defines the SEC controller register space as Big Endian 526028dbb8dSRuchika Gupta 527028dbb8dSRuchika Gupta CONFIG_SYS_FSL_SEC_LE 528028dbb8dSRuchika Gupta Defines the SEC controller register space as Little Endian 529028dbb8dSRuchika Gupta 53092bbd64eSDaniel Schwierzeck- MIPS CPU options: 53192bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 53292bbd64eSDaniel Schwierzeck 53392bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 53492bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 53592bbd64eSDaniel Schwierzeck relocation. 53692bbd64eSDaniel Schwierzeck 53792bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 53892bbd64eSDaniel Schwierzeck 53992bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 54092bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 54192bbd64eSDaniel Schwierzeck Possible values are: 54292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 54392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 54492bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 54592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 54692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 54792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 54892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 54992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 55092bbd64eSDaniel Schwierzeck 55192bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 55292bbd64eSDaniel Schwierzeck 55392bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 55492bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 55592bbd64eSDaniel Schwierzeck 55692bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 55792bbd64eSDaniel Schwierzeck 55892bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 55992bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 56092bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 56192bbd64eSDaniel Schwierzeck 562b67d8816SChristian Riesch- ARM options: 563b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 564b67d8816SChristian Riesch 565b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 566b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 567b67d8816SChristian Riesch 568207774b2SYork Sun COUNTER_FREQUENCY 569207774b2SYork Sun Generic timer clock source frequency. 570207774b2SYork Sun 571207774b2SYork Sun COUNTER_FREQUENCY_REAL 572207774b2SYork Sun Generic timer clock source frequency if the real clock is 573207774b2SYork Sun different from COUNTER_FREQUENCY, and can only be determined 574207774b2SYork Sun at run time. 575207774b2SYork Sun 57673c38934SStephen Warren- Tegra SoC options: 57773c38934SStephen Warren CONFIG_TEGRA_SUPPORT_NON_SECURE 57873c38934SStephen Warren 57973c38934SStephen Warren Support executing U-Boot in non-secure (NS) mode. Certain 58073c38934SStephen Warren impossible actions will be skipped if the CPU is in NS mode, 58173c38934SStephen Warren such as ARM architectural timer initialization. 58273c38934SStephen Warren 5835da627a4Swdenk- Linux Kernel Interface: 584c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 585c609719bSwdenk 586c609719bSwdenk U-Boot stores all clock information in Hz 587c609719bSwdenk internally. For binary compatibility with older Linux 588c609719bSwdenk kernels (which expect the clocks passed in the 589c609719bSwdenk bd_info data to be in MHz) the environment variable 590c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 591c609719bSwdenk converts clock data to MHZ before passing it to the 592c609719bSwdenk Linux kernel. 593c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 594c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 595c609719bSwdenk default environment. 596c609719bSwdenk 5975da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 5985da627a4Swdenk 599b445bbb4SJeremiah Mahler When transferring memsize parameter to Linux, some versions 6005da627a4Swdenk expect it to be in bytes, others in MB. 6015da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 6025da627a4Swdenk 603fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 604f57f70aaSWolfgang Denk 605f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 606213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 607213bf8c8SGerald Van Baren concepts). 608213bf8c8SGerald Van Baren 609213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 610213bf8c8SGerald Van Baren * New libfdt-based support 611213bf8c8SGerald Van Baren * Adds the "fdt" command 6123bb342fcSKim Phillips * The bootm command automatically updates the fdt 613213bf8c8SGerald Van Baren 614f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 615c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 616f57f70aaSWolfgang Denk 61711ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 61811ccc33fSMarcel Ziswiler addresses 6193bb342fcSKim Phillips 6204e253137SKumar Gala CONFIG_OF_BOARD_SETUP 6214e253137SKumar Gala 6224e253137SKumar Gala Board code has addition modification that it wants to make 6234e253137SKumar Gala to the flat device tree before handing it off to the kernel 6246705d81eSwdenk 625c654b517SSimon Glass CONFIG_OF_SYSTEM_SETUP 626c654b517SSimon Glass 627c654b517SSimon Glass Other code has addition modification that it wants to make 628c654b517SSimon Glass to the flat device tree before handing it off to the kernel. 629c654b517SSimon Glass This causes ft_system_setup() to be called before booting 630c654b517SSimon Glass the kernel. 631c654b517SSimon Glass 6323887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 6333887c3fbSHeiko Schocher 6343887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 6353887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 6363887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 6373887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 6383887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 6393887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 6403887c3fbSHeiko Schocher 6417eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 6427eb29398SIgor Grinberg 6437eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 6447eb29398SIgor Grinberg machine type and must be used to specify the machine type 6457eb29398SIgor Grinberg number as it appears in the ARM machine registry 6467eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 6477eb29398SIgor Grinberg Only boards that have multiple machine types supported 6487eb29398SIgor Grinberg in a single configuration file and the machine type is 6497eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 6507eb29398SIgor Grinberg 6510b2f4ecaSNiklaus Giger- vxWorks boot parameters: 6520b2f4ecaSNiklaus Giger 6530b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 6549e98b7e3SBin Meng environments variables: bootdev, bootfile, ipaddr, netmask, 6559e98b7e3SBin Meng serverip, gatewayip, hostname, othbootargs. 6560b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 6570b2f4ecaSNiklaus Giger 6580b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 6590b2f4ecaSNiklaus Giger the defaults discussed just above. 6600b2f4ecaSNiklaus Giger 6612c451f78SAneesh V- Cache Configuration: 6622c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 6632c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 6642c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 6652c451f78SAneesh V 66693bc2193SAneesh V- Cache Configuration for ARM: 66793bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 66893bc2193SAneesh V controller 66993bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 67093bc2193SAneesh V controller register space 67193bc2193SAneesh V 6726705d81eSwdenk- Serial Ports: 67348d0192fSAndreas Engel CONFIG_PL010_SERIAL 6746705d81eSwdenk 6756705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 6766705d81eSwdenk 67748d0192fSAndreas Engel CONFIG_PL011_SERIAL 6786705d81eSwdenk 6796705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 6806705d81eSwdenk 6816705d81eSwdenk CONFIG_PL011_CLOCK 6826705d81eSwdenk 6836705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 6846705d81eSwdenk the clock speed of the UARTs. 6856705d81eSwdenk 6866705d81eSwdenk CONFIG_PL01x_PORTS 6876705d81eSwdenk 6886705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 6896705d81eSwdenk define this to a list of base addresses for each (supported) 6906705d81eSwdenk port. See e.g. include/configs/versatile.h 6916705d81eSwdenk 692d57dee57SKaricheri, Muralidharan CONFIG_SERIAL_HW_FLOW_CONTROL 693d57dee57SKaricheri, Muralidharan 694d57dee57SKaricheri, Muralidharan Define this variable to enable hw flow control in serial driver. 695d57dee57SKaricheri, Muralidharan Current user of this option is drivers/serial/nsl16550.c driver 6966705d81eSwdenk 697c609719bSwdenk- Console Baudrate: 698c609719bSwdenk CONFIG_BAUDRATE - in bps 699c609719bSwdenk Select one of the baudrates listed in 7006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 701c609719bSwdenk 702c609719bSwdenk- Autoboot Command: 703c609719bSwdenk CONFIG_BOOTCOMMAND 704c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 705c609719bSwdenk define a command string that is automatically executed 706c609719bSwdenk when no character is read on the console interface 707c609719bSwdenk within "Boot Delay" after reset. 708c609719bSwdenk 709c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 710c609719bSwdenk The value of these goes into the environment as 711c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 712c609719bSwdenk as a convenience, when switching between booting from 71311ccc33fSMarcel Ziswiler RAM and NFS. 714c609719bSwdenk 715eda0ba38SHeiko Schocher- Bootcount: 716eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 717eda0ba38SHeiko Schocher Implements a mechanism for detecting a repeating reboot 718eda0ba38SHeiko Schocher cycle, see: 719eda0ba38SHeiko Schocher http://www.denx.de/wiki/view/DULG/UBootBootCountLimit 720eda0ba38SHeiko Schocher 721eda0ba38SHeiko Schocher CONFIG_BOOTCOUNT_ENV 722eda0ba38SHeiko Schocher If no softreset save registers are found on the hardware 723eda0ba38SHeiko Schocher "bootcount" is stored in the environment. To prevent a 724eda0ba38SHeiko Schocher saveenv on all reboots, the environment variable 725eda0ba38SHeiko Schocher "upgrade_available" is used. If "upgrade_available" is 726eda0ba38SHeiko Schocher 0, "bootcount" is always 0, if "upgrade_available" is 727eda0ba38SHeiko Schocher 1 "bootcount" is incremented in the environment. 728eda0ba38SHeiko Schocher So the Userspace Applikation must set the "upgrade_available" 729eda0ba38SHeiko Schocher and "bootcount" variable to 0, if a boot was successfully. 730eda0ba38SHeiko Schocher 731c609719bSwdenk- Pre-Boot Commands: 732c609719bSwdenk CONFIG_PREBOOT 733c609719bSwdenk 734c609719bSwdenk When this option is #defined, the existence of the 735c609719bSwdenk environment variable "preboot" will be checked 736c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 737c609719bSwdenk countdown and/or running the auto-boot command resp. 738c609719bSwdenk entering interactive mode. 739c609719bSwdenk 740c609719bSwdenk This feature is especially useful when "preboot" is 741c609719bSwdenk automatically generated or modified. For an example 742c609719bSwdenk see the LWMON board specific code: here "preboot" is 743c609719bSwdenk modified when the user holds down a certain 744c609719bSwdenk combination of keys on the (special) keyboard when 745c609719bSwdenk booting the systems 746c609719bSwdenk 747c609719bSwdenk- Serial Download Echo Mode: 748c609719bSwdenk CONFIG_LOADS_ECHO 749c609719bSwdenk If defined to 1, all characters received during a 750c609719bSwdenk serial download (using the "loads" command) are 751c609719bSwdenk echoed back. This might be needed by some terminal 752c609719bSwdenk emulations (like "cu"), but may as well just take 753c609719bSwdenk time on others. This setting #define's the initial 754c609719bSwdenk value of the "loads_echo" environment variable. 755c609719bSwdenk 756602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 757c609719bSwdenk CONFIG_KGDB_BAUDRATE 758c609719bSwdenk Select one of the baudrates listed in 7596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 760c609719bSwdenk 761302a6487SSimon Glass- Removal of commands 762302a6487SSimon Glass If no commands are needed to boot, you can disable 763302a6487SSimon Glass CONFIG_CMDLINE to remove them. In this case, the command line 764302a6487SSimon Glass will not be available, and when U-Boot wants to execute the 765302a6487SSimon Glass boot command (on start-up) it will call board_run_command() 766302a6487SSimon Glass instead. This can reduce image size significantly for very 767302a6487SSimon Glass simple boot procedures. 768302a6487SSimon Glass 769a5ecbe62SWolfgang Denk- Regular expression support: 770a5ecbe62SWolfgang Denk CONFIG_REGEX 771a5ecbe62SWolfgang Denk If this variable is defined, U-Boot is linked against 772a5ecbe62SWolfgang Denk the SLRE (Super Light Regular Expression) library, 773a5ecbe62SWolfgang Denk which adds regex support to some commands, as for 774a5ecbe62SWolfgang Denk example "env grep" and "setexpr". 775a5ecbe62SWolfgang Denk 77645ba8077SSimon Glass- Device tree: 77745ba8077SSimon Glass CONFIG_OF_CONTROL 77845ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 77945ba8077SSimon Glass to configure its devices, instead of relying on statically 78045ba8077SSimon Glass compiled #defines in the board file. This option is 78145ba8077SSimon Glass experimental and only available on a few boards. The device 78245ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 78345ba8077SSimon Glass 7842c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 78582f766d1SAlex Deymo be done using one of the three options below: 786bbb0b128SSimon Glass 787bbb0b128SSimon Glass CONFIG_OF_EMBED 788bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 789bbb0b128SSimon Glass binary in its image. This device tree file should be in the 790bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 791bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 792eb3eb602SNobuhiro Iwamatsu the global data structure as gd->fdt_blob. 79345ba8077SSimon Glass 7942c0f79e4SSimon Glass CONFIG_OF_SEPARATE 7952c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 7962c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 7972c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 7982c0f79e4SSimon Glass 7992c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 8002c0f79e4SSimon Glass 8012c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 8022c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 8032c0f79e4SSimon Glass still use the individual files if you need something more 8042c0f79e4SSimon Glass exotic. 8052c0f79e4SSimon Glass 80682f766d1SAlex Deymo CONFIG_OF_BOARD 80782f766d1SAlex Deymo If this variable is defined, U-Boot will use the device tree 80882f766d1SAlex Deymo provided by the board at runtime instead of embedding one with 80982f766d1SAlex Deymo the image. Only boards defining board_fdt_blob_setup() support 81082f766d1SAlex Deymo this option (see include/fdtdec.h file). 81182f766d1SAlex Deymo 812c609719bSwdenk- Watchdog: 813c609719bSwdenk CONFIG_WATCHDOG 814c609719bSwdenk If this variable is defined, it enables watchdog 8156abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 816907208c4SChristophe Leroy specific code for a watchdog. For the 8xx 817907208c4SChristophe Leroy CPUs, the SIU Watchdog feature is enabled in the SYPCR 818907208c4SChristophe Leroy register. When supported for a specific SoC is 819907208c4SChristophe Leroy available, then no further board specific code should 820907208c4SChristophe Leroy be needed to use it. 8216abe6fb6SDetlev Zundel 8226abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 8236abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 8246abe6fb6SDetlev Zundel SoC, then define this variable and provide board 8256abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 826c609719bSwdenk 8277bae0d6fSHeiko Schocher CONFIG_AT91_HW_WDT_TIMEOUT 8287bae0d6fSHeiko Schocher specify the timeout in seconds. default 2 seconds. 8297bae0d6fSHeiko Schocher 830c1551ea8Sstroese- U-Boot Version: 831c1551ea8Sstroese CONFIG_VERSION_VARIABLE 832c1551ea8Sstroese If this variable is defined, an environment variable 833c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 834c1551ea8Sstroese version as printed by the "version" command. 835a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 836a1ea8e51SBenoît Thébaudeau next reset. 837c1551ea8Sstroese 838c609719bSwdenk- Real-Time Clock: 839c609719bSwdenk 840602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 841c609719bSwdenk has to be selected, too. Define exactly one of the 842c609719bSwdenk following options: 843c609719bSwdenk 844c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 8454e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 846c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 8471cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 848c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 8497f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 850412921d2SMarkus Niebel CONFIG_RTC_DS1339 - use Maxim, Inc. DS1339 RTC 8513bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 8529536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 8534c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 8542bd3cab3SChris Packham CONFIG_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 85571d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 85671d19f30SHeiko Schocher RV3029 RTC. 857c609719bSwdenk 858b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 859b37c7e5eSwdenk must also be configured. See I2C Support, below. 860b37c7e5eSwdenk 861e92739d3SPeter Tyser- GPIO Support: 862e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 863e92739d3SPeter Tyser 8645dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 8655dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 8665dec49caSChris Packham pins supported by a particular chip. 8675dec49caSChris Packham 868e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 869e92739d3SPeter Tyser must also be configured. See I2C Support, below. 870e92739d3SPeter Tyser 871aa53233aSSimon Glass- I/O tracing: 872aa53233aSSimon Glass When CONFIG_IO_TRACE is selected, U-Boot intercepts all I/O 873aa53233aSSimon Glass accesses and can checksum them or write a list of them out 874aa53233aSSimon Glass to memory. See the 'iotrace' command for details. This is 875aa53233aSSimon Glass useful for testing device drivers since it can confirm that 876aa53233aSSimon Glass the driver behaves the same way before and after a code 877aa53233aSSimon Glass change. Currently this is supported on sandbox and arm. To 878aa53233aSSimon Glass add support for your architecture, add '#include <iotrace.h>' 879aa53233aSSimon Glass to the bottom of arch/<arch>/include/asm/io.h and test. 880aa53233aSSimon Glass 881aa53233aSSimon Glass Example output from the 'iotrace stats' command is below. 882aa53233aSSimon Glass Note that if the trace buffer is exhausted, the checksum will 883aa53233aSSimon Glass still continue to operate. 884aa53233aSSimon Glass 885aa53233aSSimon Glass iotrace is enabled 886aa53233aSSimon Glass Start: 10000000 (buffer start address) 887aa53233aSSimon Glass Size: 00010000 (buffer size) 888aa53233aSSimon Glass Offset: 00000120 (current buffer offset) 889aa53233aSSimon Glass Output: 10000120 (start + offset) 890aa53233aSSimon Glass Count: 00000018 (number of trace records) 891aa53233aSSimon Glass CRC32: 9526fb66 (CRC32 of all trace records) 892aa53233aSSimon Glass 893c609719bSwdenk- Timestamp Support: 894c609719bSwdenk 895c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 896c609719bSwdenk (date and time) of an image is printed by image 897c609719bSwdenk commands like bootm or iminfo. This option is 898602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 899c609719bSwdenk 900923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 901923c46f9SKarl O. Pinc Zero or more of the following: 902923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 903923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 904923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 905923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 906923c46f9SKarl O. Pinc disk/part_efi.c 907923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 908c609719bSwdenk 909fc843a02SSimon Glass If IDE or SCSI support is enabled (CONFIG_IDE or 910c649e3c9SSimon Glass CONFIG_SCSI) you must configure support for at 911923c46f9SKarl O. Pinc least one non-MTD partition type as well. 912c609719bSwdenk 913c609719bSwdenk- IDE Reset method: 9144d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 9154d13cbadSwdenk board configurations files but used nowhere! 916c609719bSwdenk 9174d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 9184d13cbadSwdenk be performed by calling the function 9194d13cbadSwdenk ide_set_reset(int reset) 9204d13cbadSwdenk which has to be defined in a board specific file 921c609719bSwdenk 922c609719bSwdenk- ATAPI Support: 923c609719bSwdenk CONFIG_ATAPI 924c609719bSwdenk 925c609719bSwdenk Set this to enable ATAPI support. 926c609719bSwdenk 927c40b2956Swdenk- LBA48 Support 928c40b2956Swdenk CONFIG_LBA48 929c40b2956Swdenk 930c40b2956Swdenk Set this to enable support for disks larger than 137GB 9314b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 932c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 933c40b2956Swdenk support disks up to 2.1TB. 934c40b2956Swdenk 9356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 936c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 937c40b2956Swdenk Default is 32bit. 938c40b2956Swdenk 939c609719bSwdenk- SCSI Support: 9406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 9416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 9426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 943c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 944c609719bSwdenk devices. 945c609719bSwdenk 946447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 947447c031bSStefan Reinauer SCSI devices found during the last scan. 948447c031bSStefan Reinauer 949c609719bSwdenk- NETWORK Support (PCI): 950682011ffSwdenk CONFIG_E1000 951ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 952ce5207e1SKyle Moffett 953ce5207e1SKyle Moffett CONFIG_E1000_SPI 954ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 955ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 956ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 957ce5207e1SKyle Moffett 958ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 959ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 960ce5207e1SKyle Moffett example with the "sspi" command. 961ce5207e1SKyle Moffett 962c609719bSwdenk CONFIG_EEPRO100 963c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 96411ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 965c609719bSwdenk write routine for first time initialisation. 966c609719bSwdenk 967c609719bSwdenk CONFIG_TULIP 968c609719bSwdenk Support for Digital 2114x chips. 969c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 970c609719bSwdenk modem chip initialisation (KS8761/QS6611). 971c609719bSwdenk 972c609719bSwdenk CONFIG_NATSEMI 973c609719bSwdenk Support for National dp83815 chips. 974c609719bSwdenk 975c609719bSwdenk CONFIG_NS8382X 976c609719bSwdenk Support for National dp8382[01] gigabit chips. 977c609719bSwdenk 97845219c46Swdenk- NETWORK Support (other): 97945219c46Swdenk 980c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 981c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 982c041e9d2SJens Scharsig 983c041e9d2SJens Scharsig CONFIG_RMII 984c041e9d2SJens Scharsig Define this to use reduced MII inteface 985c041e9d2SJens Scharsig 986c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 987c041e9d2SJens Scharsig If this defined, the driver is quiet. 988c041e9d2SJens Scharsig The driver doen't show link status messages. 989c041e9d2SJens Scharsig 990efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 991efdd7319SRob Herring Support for the Calxeda XGMAC device 992efdd7319SRob Herring 9933bb46d23SAshok CONFIG_LAN91C96 99445219c46Swdenk Support for SMSC's LAN91C96 chips. 99545219c46Swdenk 99645219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 99745219c46Swdenk Define this to enable 32 bit addressing 99845219c46Swdenk 9993bb46d23SAshok CONFIG_SMC91111 1000f39748aeSwdenk Support for SMSC's LAN91C111 chip 1001f39748aeSwdenk 1002f39748aeSwdenk CONFIG_SMC91111_BASE 1003f39748aeSwdenk Define this to hold the physical address 1004f39748aeSwdenk of the device (I/O space) 1005f39748aeSwdenk 1006f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1007f39748aeSwdenk Define this if data bus is 32 bits 1008f39748aeSwdenk 1009f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1010f39748aeSwdenk Define this to use i/o functions instead of macros 1011f39748aeSwdenk (some hardware wont work with macros) 1012f39748aeSwdenk 1013dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1014dc02badaSHeiko Schocher Support for davinci emac 1015dc02badaSHeiko Schocher 1016dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1017dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1018dc02badaSHeiko Schocher 1019b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1020b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1021b3dbf4a5SMacpaul Lin 1022b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1023b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1024b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1025b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1026b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1027b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1028b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1029b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1030b3dbf4a5SMacpaul Lin 1031c2fff331SMike Rapoport CONFIG_SMC911X 1032557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1033557b377dSJens Gehrlein 1034c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1035557b377dSJens Gehrlein Define this to hold the physical address 1036557b377dSJens Gehrlein of the device (I/O space) 1037557b377dSJens Gehrlein 1038c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1039557b377dSJens Gehrlein Define this if data bus is 32 bits 1040557b377dSJens Gehrlein 1041c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1042557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1043557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1044c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1045557b377dSJens Gehrlein 10463d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 10473d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 10483d0075faSYoshihiro Shimoda 10493d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 10503d0075faSYoshihiro Shimoda Define the number of ports to be used 10513d0075faSYoshihiro Shimoda 10523d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 10533d0075faSYoshihiro Shimoda Define the ETH PHY's address 10543d0075faSYoshihiro Shimoda 105568260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 105668260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 105768260aabSYoshihiro Shimoda 1058b2f97cf2SHeiko Schocher- PWM Support: 1059b2f97cf2SHeiko Schocher CONFIG_PWM_IMX 10605052e819SRobert P. J. Day Support for PWM module on the imx6. 1061b2f97cf2SHeiko Schocher 10625e124724SVadim Bendebury- TPM Support: 106390899cc0SChe-liang Chiou CONFIG_TPM 106490899cc0SChe-liang Chiou Support TPM devices. 106590899cc0SChe-liang Chiou 10660766ad2fSChristophe Ricard CONFIG_TPM_TIS_INFINEON 10670766ad2fSChristophe Ricard Support for Infineon i2c bus TPM devices. Only one device 10681b393db5STom Wai-Hong Tam per system is supported at this time. 10691b393db5STom Wai-Hong Tam 10701b393db5STom Wai-Hong Tam CONFIG_TPM_TIS_I2C_BURST_LIMITATION 10711b393db5STom Wai-Hong Tam Define the burst count bytes upper limit 10721b393db5STom Wai-Hong Tam 10733aa74088SChristophe Ricard CONFIG_TPM_ST33ZP24 10743aa74088SChristophe Ricard Support for STMicroelectronics TPM devices. Requires DM_TPM support. 10753aa74088SChristophe Ricard 10763aa74088SChristophe Ricard CONFIG_TPM_ST33ZP24_I2C 10773aa74088SChristophe Ricard Support for STMicroelectronics ST33ZP24 I2C devices. 10783aa74088SChristophe Ricard Requires TPM_ST33ZP24 and I2C. 10793aa74088SChristophe Ricard 1080b75fdc11SChristophe Ricard CONFIG_TPM_ST33ZP24_SPI 1081b75fdc11SChristophe Ricard Support for STMicroelectronics ST33ZP24 SPI devices. 1082b75fdc11SChristophe Ricard Requires TPM_ST33ZP24 and SPI. 1083b75fdc11SChristophe Ricard 1084c01939c7SDirk Eibach CONFIG_TPM_ATMEL_TWI 1085c01939c7SDirk Eibach Support for Atmel TWI TPM device. Requires I2C support. 1086c01939c7SDirk Eibach 108790899cc0SChe-liang Chiou CONFIG_TPM_TIS_LPC 10885e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 10895e124724SVadim Bendebury per system is supported at this time. 10905e124724SVadim Bendebury 10915e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 10925e124724SVadim Bendebury Base address where the generic TPM device is mapped 10935e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 10945e124724SVadim Bendebury 0xfed40000. 10955e124724SVadim Bendebury 1096be6c1529SReinhard Pfau CONFIG_TPM 1097be6c1529SReinhard Pfau Define this to enable the TPM support library which provides 1098be6c1529SReinhard Pfau functional interfaces to some TPM commands. 1099be6c1529SReinhard Pfau Requires support for a TPM device. 1100be6c1529SReinhard Pfau 1101be6c1529SReinhard Pfau CONFIG_TPM_AUTH_SESSIONS 1102be6c1529SReinhard Pfau Define this to enable authorized functions in the TPM library. 1103be6c1529SReinhard Pfau Requires CONFIG_TPM and CONFIG_SHA1. 1104be6c1529SReinhard Pfau 1105c609719bSwdenk- USB Support: 1106c609719bSwdenk At the moment only the UHCI host controller is 1107064b55cfSHeiko Schocher supported (PIP405, MIP405); define 1108c609719bSwdenk CONFIG_USB_UHCI to enable it. 1109c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 111030d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1111c609719bSwdenk storage devices. 1112c609719bSwdenk Note: 1113c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1114c609719bSwdenk (TEAC FD-05PUB). 11154d13cbadSwdenk 11169ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 11179ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 11189ab4ce22SSimon Glass 11196e9e0626SOleksandr Tymoshenko CONFIG_USB_DWC2_REG_ADDR the physical CPU address of the DWC2 11206e9e0626SOleksandr Tymoshenko HW module registers. 11216e9e0626SOleksandr Tymoshenko 112216c8d5e7SWolfgang Denk- USB Device: 112316c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 112416c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 112516c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 112611ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 112716c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 112816c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 112916c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 113016c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 113116c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 113216c8d5e7SWolfgang Denk a Linux host by 113316c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 113416c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 113516c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 113616c8d5e7SWolfgang Denk might be defined in YourBoardName.h 113716c8d5e7SWolfgang Denk 113816c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 113916c8d5e7SWolfgang Denk Define this to build a UDC device 114016c8d5e7SWolfgang Denk 114116c8d5e7SWolfgang Denk CONFIG_USB_TTY 114216c8d5e7SWolfgang Denk Define this to have a tty type of device available to 114316c8d5e7SWolfgang Denk talk to the UDC device 114416c8d5e7SWolfgang Denk 1145f9da0f89SVipin KUMAR CONFIG_USBD_HS 1146f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1147f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1148f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1149f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1150f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1151f9da0f89SVipin KUMAR speed. 1152f9da0f89SVipin KUMAR 11536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 115416c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 115516c8d5e7SWolfgang Denk be set to usbtty. 115616c8d5e7SWolfgang Denk 115716c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 115816c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 115916c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 116016c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 116116c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 116216c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 116316c8d5e7SWolfgang Denk 116416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 116516c8d5e7SWolfgang Denk Define this string as the name of your company for 116616c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 116716c8d5e7SWolfgang Denk 116816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 116916c8d5e7SWolfgang Denk Define this string as the name of your product 117016c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 117116c8d5e7SWolfgang Denk 117216c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 117316c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 117416c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 117516c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 117616c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 117716c8d5e7SWolfgang Denk 117816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 117916c8d5e7SWolfgang Denk Define this as the unique Product ID 118016c8d5e7SWolfgang Denk for your device 118116c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1182c609719bSwdenk 1183d70a560fSIgor Grinberg- ULPI Layer Support: 1184d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1185d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1186d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1187d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1188d70a560fSIgor Grinberg viewport is supported. 1189d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1190d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 11916d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 11926d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 11936d365ea0SLucas Stach the appropriate value in Hz. 1194c609719bSwdenk 1195c609719bSwdenk- MMC Support: 1196c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1197c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1198c609719bSwdenk accessed from the boot prompt by mapping the device 1199c609719bSwdenk to physical memory similar to flash. Command line is 1200602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1201602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1202c609719bSwdenk 1203afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1204afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1205afb35666SYoshihiro Shimoda 1206afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1207afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1208afb35666SYoshihiro Shimoda 1209afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1210afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1211afb35666SYoshihiro Shimoda 12121fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_BOOT 12131fd93c6eSPierre Aubert Enable some additional features of the eMMC boot partitions. 12141fd93c6eSPierre Aubert 12151fd93c6eSPierre Aubert CONFIG_SUPPORT_EMMC_RPMB 12161fd93c6eSPierre Aubert Enable the commands for reading, writing and programming the 12171fd93c6eSPierre Aubert key for the Replay Protection Memory Block partition in eMMC. 12181fd93c6eSPierre Aubert 1219b3ba6e94STom Rini- USB Device Firmware Update (DFU) class support: 122001acd6abSPaul Kocialkowski CONFIG_USB_FUNCTION_DFU 1221b3ba6e94STom Rini This enables the USB portion of the DFU USB class 1222b3ba6e94STom Rini 1223b3ba6e94STom Rini CONFIG_DFU_MMC 1224b3ba6e94STom Rini This enables support for exposing (e)MMC devices via DFU. 1225b3ba6e94STom Rini 1226c6631764SPantelis Antoniou CONFIG_DFU_NAND 1227c6631764SPantelis Antoniou This enables support for exposing NAND devices via DFU. 1228c6631764SPantelis Antoniou 1229a9479f04SAfzal Mohammed CONFIG_DFU_RAM 1230a9479f04SAfzal Mohammed This enables support for exposing RAM via DFU. 1231a9479f04SAfzal Mohammed Note: DFU spec refer to non-volatile memory usage, but 1232a9479f04SAfzal Mohammed allow usages beyond the scope of spec - here RAM usage, 1233a9479f04SAfzal Mohammed one that would help mostly the developer. 1234a9479f04SAfzal Mohammed 1235e7e75c70SHeiko Schocher CONFIG_SYS_DFU_DATA_BUF_SIZE 1236e7e75c70SHeiko Schocher Dfu transfer uses a buffer before writing data to the 1237e7e75c70SHeiko Schocher raw storage device. Make the size (in bytes) of this buffer 1238e7e75c70SHeiko Schocher configurable. The size of this buffer is also configurable 1239e7e75c70SHeiko Schocher through the "dfu_bufsiz" environment variable. 1240e7e75c70SHeiko Schocher 1241ea2453d5SPantelis Antoniou CONFIG_SYS_DFU_MAX_FILE_SIZE 1242ea2453d5SPantelis Antoniou When updating files rather than the raw storage device, 1243ea2453d5SPantelis Antoniou we use a static buffer to copy the file into and then write 1244ea2453d5SPantelis Antoniou the buffer once we've been given the whole file. Define 1245ea2453d5SPantelis Antoniou this to the maximum filesize (in bytes) for the buffer. 1246ea2453d5SPantelis Antoniou Default is 4 MiB if undefined. 1247ea2453d5SPantelis Antoniou 1248001a8319SHeiko Schocher DFU_DEFAULT_POLL_TIMEOUT 1249001a8319SHeiko Schocher Poll timeout [ms], is the timeout a device can send to the 1250001a8319SHeiko Schocher host. The host must wait for this timeout before sending 1251001a8319SHeiko Schocher a subsequent DFU_GET_STATUS request to the device. 1252001a8319SHeiko Schocher 1253001a8319SHeiko Schocher DFU_MANIFEST_POLL_TIMEOUT 1254001a8319SHeiko Schocher Poll timeout [ms], which the device sends to the host when 1255001a8319SHeiko Schocher entering dfuMANIFEST state. Host waits this timeout, before 1256001a8319SHeiko Schocher sending again an USB request to the device. 1257001a8319SHeiko Schocher 12586705d81eSwdenk- Journaling Flash filesystem support: 1259b2482dffSSimon Glass CONFIG_JFFS2_NAND 12606705d81eSwdenk Define these for a default partition on a NAND device 12616705d81eSwdenk 12626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 12636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 12646705d81eSwdenk Define these for a default partition on a NOR device 12656705d81eSwdenk 1266c609719bSwdenk- Keyboard Support: 126739f615edSSimon Glass See Kconfig help for available keyboard drivers. 126839f615edSSimon Glass 126939f615edSSimon Glass CONFIG_KEYBOARD 127039f615edSSimon Glass 127139f615edSSimon Glass Define this to enable a custom keyboard support. 127239f615edSSimon Glass This simply calls drv_keyboard_init() which must be 127339f615edSSimon Glass defined in your board-specific files. This option is deprecated 127439f615edSSimon Glass and is only used by novena. For new boards, use driver model 127539f615edSSimon Glass instead. 1276c609719bSwdenk 1277c609719bSwdenk- Video support: 12787d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 12797d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 12807d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 12817d3053fbSTimur Tabi support, and should also define these other macros: 12827d3053fbSTimur Tabi 12837d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 12847d3053fbSTimur Tabi CONFIG_VIDEO 12857d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 12867d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 12877d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 12887d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 12897d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 12907d3053fbSTimur Tabi 1291ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1292ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 12938eca9439SFabio Estevam boot. See the documentation file doc/README.video for a 1294ba8e76bdSTimur Tabi description of this variable. 12957d3053fbSTimur Tabi 1296c609719bSwdenk- LCD Support: CONFIG_LCD 1297c609719bSwdenk 1298c609719bSwdenk Define this to enable LCD support (for output to LCD 1299c609719bSwdenk display); also select one of the supported displays 1300c609719bSwdenk by defining one of these: 1301c609719bSwdenk 130239cf4804SStelian Pop CONFIG_ATMEL_LCD: 130339cf4804SStelian Pop 130439cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 130539cf4804SStelian Pop 1306fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1307c609719bSwdenk 1308fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1309c609719bSwdenk 1310fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1311c609719bSwdenk 1312fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1313fd3103bbSwdenk Active, color, single scan. 1314fd3103bbSwdenk 1315fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1316fd3103bbSwdenk 1317fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1318c609719bSwdenk Active, color, single scan. 1319c609719bSwdenk 1320c609719bSwdenk CONFIG_SHARP_16x9 1321c609719bSwdenk 1322c609719bSwdenk Sharp 320x240. Active, color, single scan. 1323c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1324c609719bSwdenk 1325c609719bSwdenk CONFIG_SHARP_LQ64D341 1326c609719bSwdenk 1327c609719bSwdenk Sharp LQ64D341 display, 640x480. 1328c609719bSwdenk Active, color, single scan. 1329c609719bSwdenk 1330c609719bSwdenk CONFIG_HLD1045 1331c609719bSwdenk 1332c609719bSwdenk HLD1045 display, 640x480. 1333c609719bSwdenk Active, color, single scan. 1334c609719bSwdenk 1335c609719bSwdenk CONFIG_OPTREX_BW 1336c609719bSwdenk 1337c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1338c609719bSwdenk or 1339c609719bSwdenk Hitachi LMG6912RPFC-00T 1340c609719bSwdenk or 1341c609719bSwdenk Hitachi SP14Q002 1342c609719bSwdenk 1343c609719bSwdenk 320x240. Black & white. 1344c609719bSwdenk 1345676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1346676d319eSSimon Glass 1347b445bbb4SJeremiah Mahler Normally the LCD is page-aligned (typically 4KB). If this is 1348676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1349676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1350676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1351676d319eSSimon Glass a per-section basis. 1352676d319eSSimon Glass 1353676d319eSSimon Glass 1354604c7d4aSHannes Petermaier CONFIG_LCD_ROTATION 1355604c7d4aSHannes Petermaier 1356604c7d4aSHannes Petermaier Sometimes, for example if the display is mounted in portrait 1357604c7d4aSHannes Petermaier mode or even if it's mounted landscape but rotated by 180degree, 1358604c7d4aSHannes Petermaier we need to rotate our content of the display relative to the 1359604c7d4aSHannes Petermaier framebuffer, so that user can read the messages which are 1360604c7d4aSHannes Petermaier printed out. 1361604c7d4aSHannes Petermaier Once CONFIG_LCD_ROTATION is defined, the lcd_console will be 1362604c7d4aSHannes Petermaier initialized with a given rotation from "vl_rot" out of 1363604c7d4aSHannes Petermaier "vidinfo_t" which is provided by the board specific code. 1364604c7d4aSHannes Petermaier The value for vl_rot is coded as following (matching to 1365604c7d4aSHannes Petermaier fbcon=rotate:<n> linux-kernel commandline): 1366604c7d4aSHannes Petermaier 0 = no rotation respectively 0 degree 1367604c7d4aSHannes Petermaier 1 = 90 degree rotation 1368604c7d4aSHannes Petermaier 2 = 180 degree rotation 1369604c7d4aSHannes Petermaier 3 = 270 degree rotation 1370604c7d4aSHannes Petermaier 1371604c7d4aSHannes Petermaier If CONFIG_LCD_ROTATION is not defined, the console will be 1372604c7d4aSHannes Petermaier initialized with 0degree rotation. 1373604c7d4aSHannes Petermaier 137445d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 137545d7f525STom Wai-Hong Tam 137645d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 137745d7f525STom Wai-Hong Tam 1378735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1379735987c5STom Wai-Hong Tam 1380735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1381735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1382735987c5STom Wai-Hong Tam 13837152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1384d791b1dcSwdenk 1385d791b1dcSwdenk If this option is set, the environment is checked for 1386d791b1dcSwdenk a variable "splashimage". If found, the usual display 1387d791b1dcSwdenk of logo, copyright and system information on the LCD 1388e94d2cd9Swdenk is suppressed and the BMP image at the address 1389d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1390d791b1dcSwdenk console is redirected to the "nulldev", too. This 1391d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1392d791b1dcSwdenk loaded very quickly after power-on. 1393d791b1dcSwdenk 1394c0880485SNikita Kiryanov CONFIG_SPLASHIMAGE_GUARD 1395c0880485SNikita Kiryanov 1396c0880485SNikita Kiryanov If this option is set, then U-Boot will prevent the environment 1397c0880485SNikita Kiryanov variable "splashimage" from being set to a problematic address 1398ab5645f1SFabio Estevam (see doc/README.displaying-bmps). 1399c0880485SNikita Kiryanov This option is useful for targets where, due to alignment 1400c0880485SNikita Kiryanov restrictions, an improperly aligned BMP image will cause a data 1401c0880485SNikita Kiryanov abort. If you think you will not have problems with unaligned 1402c0880485SNikita Kiryanov accesses (for example because your toolchain prevents them) 1403c0880485SNikita Kiryanov there is no need to set this option. 1404c0880485SNikita Kiryanov 14051ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 14061ca298ceSMatthias Weisser 14071ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 14081ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 14091ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 14101ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 14111ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 14121ca298ceSMatthias Weisser specify 'm' for centering the image. 14131ca298ceSMatthias Weisser 14141ca298ceSMatthias Weisser Example: 14151ca298ceSMatthias Weisser setenv splashpos m,m 14161ca298ceSMatthias Weisser => image at center of screen 14171ca298ceSMatthias Weisser 14181ca298ceSMatthias Weisser setenv splashpos 30,20 14191ca298ceSMatthias Weisser => image at x = 30 and y = 20 14201ca298ceSMatthias Weisser 14211ca298ceSMatthias Weisser setenv splashpos -10,m 14221ca298ceSMatthias Weisser => vertically centered image 14231ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 14241ca298ceSMatthias Weisser 142598f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 142698f4a3dfSStefan Roese 142798f4a3dfSStefan Roese If this option is set, additionally to standard BMP 142898f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 142998f4a3dfSStefan Roese splashscreen support or the bmp command. 143098f4a3dfSStefan Roese 1431d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1432d5011762SAnatolij Gustschin 1433d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1434d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1435d5011762SAnatolij Gustschin bmp command. 1436d5011762SAnatolij Gustschin 1437c29fdfc1Swdenk- Compression support: 14388ef70478SKees Cook CONFIG_GZIP 14398ef70478SKees Cook 14408ef70478SKees Cook Enabled by default to support gzip compressed images. 14418ef70478SKees Cook 1442c29fdfc1Swdenk CONFIG_BZIP2 1443c29fdfc1Swdenk 1444c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1445c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1446c29fdfc1Swdenk compressed images are supported. 1447c29fdfc1Swdenk 1448c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 14496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1450c29fdfc1Swdenk be at least 4MB. 1451d791b1dcSwdenk 145217ea1177Swdenk- MII/PHY support: 145317ea1177Swdenk CONFIG_PHY_ADDR 145417ea1177Swdenk 145517ea1177Swdenk The address of PHY on MII bus. 145617ea1177Swdenk 145717ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 145817ea1177Swdenk 145917ea1177Swdenk The clock frequency of the MII bus 146017ea1177Swdenk 146117ea1177Swdenk CONFIG_PHY_RESET_DELAY 146217ea1177Swdenk 146317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 146417ea1177Swdenk reset before any MII register access is possible. 146517ea1177Swdenk For such PHY, set this option to the usec delay 146617ea1177Swdenk required. (minimum 300usec for LXT971A) 146717ea1177Swdenk 146817ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 146917ea1177Swdenk 147017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 147117ea1177Swdenk command issued before MII status register can be read 147217ea1177Swdenk 1473c609719bSwdenk- IP address: 1474c609719bSwdenk CONFIG_IPADDR 1475c609719bSwdenk 1476c609719bSwdenk Define a default value for the IP address to use for 147711ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1478c609719bSwdenk determined through e.g. bootp. 14791ebcd654SWolfgang Denk (Environment variable "ipaddr") 1480c609719bSwdenk 1481c609719bSwdenk- Server IP address: 1482c609719bSwdenk CONFIG_SERVERIP 1483c609719bSwdenk 1484c609719bSwdenk Defines a default value for the IP address of a TFTP 1485c609719bSwdenk server to contact when using the "tftboot" command. 14861ebcd654SWolfgang Denk (Environment variable "serverip") 1487c609719bSwdenk 148897cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 148997cfe861SRobin Getz 149097cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 149197cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 149297cfe861SRobin Getz 14931ebcd654SWolfgang Denk- Gateway IP address: 14941ebcd654SWolfgang Denk CONFIG_GATEWAYIP 14951ebcd654SWolfgang Denk 14961ebcd654SWolfgang Denk Defines a default value for the IP address of the 14971ebcd654SWolfgang Denk default router where packets to other networks are 14981ebcd654SWolfgang Denk sent to. 14991ebcd654SWolfgang Denk (Environment variable "gatewayip") 15001ebcd654SWolfgang Denk 15011ebcd654SWolfgang Denk- Subnet mask: 15021ebcd654SWolfgang Denk CONFIG_NETMASK 15031ebcd654SWolfgang Denk 15041ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 15051ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 15061ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 15071ebcd654SWolfgang Denk forwarded through a router. 15081ebcd654SWolfgang Denk (Environment variable "netmask") 15091ebcd654SWolfgang Denk 151053a5c424SDavid Updegraff- Multicast TFTP Mode: 151153a5c424SDavid Updegraff CONFIG_MCAST_TFTP 151253a5c424SDavid Updegraff 151353a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 151453a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 151511ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 151653a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 151753a5c424SDavid Updegraff multicast group. 151853a5c424SDavid Updegraff 1519c609719bSwdenk- BOOTP Recovery Mode: 1520c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1521c609719bSwdenk 1522c609719bSwdenk If you have many targets in a network that try to 1523c609719bSwdenk boot using BOOTP, you may want to avoid that all 1524c609719bSwdenk systems send out BOOTP requests at precisely the same 1525c609719bSwdenk moment (which would happen for instance at recovery 1526c609719bSwdenk from a power failure, when all systems will try to 1527c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1528c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1529c609719bSwdenk inserted before sending out BOOTP requests. The 15306c33c785SWolfgang Denk following delays are inserted then: 1531c609719bSwdenk 1532c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1533c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1534c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1535c609719bSwdenk 4th and following 1536c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1537c609719bSwdenk 153892ac8accSThierry Reding CONFIG_BOOTP_ID_CACHE_SIZE 153992ac8accSThierry Reding 154092ac8accSThierry Reding BOOTP packets are uniquely identified using a 32-bit ID. The 154192ac8accSThierry Reding server will copy the ID from client requests to responses and 154292ac8accSThierry Reding U-Boot will use this to determine if it is the destination of 154392ac8accSThierry Reding an incoming response. Some servers will check that addresses 154492ac8accSThierry Reding aren't in use before handing them out (usually using an ARP 154592ac8accSThierry Reding ping) and therefore take up to a few hundred milliseconds to 154692ac8accSThierry Reding respond. Network congestion may also influence the time it 154792ac8accSThierry Reding takes for a response to make it back to the client. If that 154892ac8accSThierry Reding time is too long, U-Boot will retransmit requests. In order 154992ac8accSThierry Reding to allow earlier responses to still be accepted after these 155092ac8accSThierry Reding retransmissions, U-Boot's BOOTP client keeps a small cache of 155192ac8accSThierry Reding IDs. The CONFIG_BOOTP_ID_CACHE_SIZE controls the size of this 155292ac8accSThierry Reding cache. The default is to keep IDs for up to four outstanding 155392ac8accSThierry Reding requests. Increasing this will allow U-Boot to accept offers 155492ac8accSThierry Reding from a BOOTP client in networks with unusually high latency. 155592ac8accSThierry Reding 1556fe389a82Sstroese- DHCP Advanced Options: 15571fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 15581fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1559fe389a82Sstroese 15601fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 15611fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 15621fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 15631fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 15641fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 15651fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 15661fe80d79SJon Loeliger CONFIG_BOOTP_DNS 15671fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 15681fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 15691fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 15701fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 15711fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 15722c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1573fe389a82Sstroese 15745d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 15755d110f0aSWilson Callan environment variable, not the BOOTP server. 1576fe389a82Sstroese 15772c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 15782c00e099SJoe Hershberger after the configured retry count, the call will fail 15792c00e099SJoe Hershberger instead of starting over. This can be used to fail over 15802c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 15812c00e099SJoe Hershberger is not available. 15822c00e099SJoe Hershberger 1583fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1584fe389a82Sstroese serverip from a DHCP server, it is possible that more 1585fe389a82Sstroese than one DNS serverip is offered to the client. 1586fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1587fe389a82Sstroese serverip will be stored in the additional environment 1588fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1589fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 15901fe80d79SJon Loeliger is defined. 1591fe389a82Sstroese 1592fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1593fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1594fe389a82Sstroese need the hostname of the DHCP requester. 15955d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 15961fe80d79SJon Loeliger of the "hostname" environment variable is passed as 15971fe80d79SJon Loeliger option 12 to the DHCP server. 1598fe389a82Sstroese 1599d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1600d9a2f416SAras Vaichas 1601d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1602d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1603d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1604d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1605d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1606d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1607d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1608d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1609d9a2f416SAras Vaichas that one of the retries will be successful but note that 1610d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1611d9a2f416SAras Vaichas this delay. 1612d9a2f416SAras Vaichas 1613d22c338eSJoe Hershberger - Link-local IP address negotiation: 1614d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1615d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1616d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1617d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1618d22c338eSJoe Hershberger 1619d22c338eSJoe Hershberger See doc/README.link-local for more information. 1620d22c338eSJoe Hershberger 1621a3d991bdSwdenk - CDP Options: 1622a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1623a3d991bdSwdenk 1624a3d991bdSwdenk The device id used in CDP trigger frames. 1625a3d991bdSwdenk 1626a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1627a3d991bdSwdenk 1628a3d991bdSwdenk A two character string which is prefixed to the MAC address 1629a3d991bdSwdenk of the device. 1630a3d991bdSwdenk 1631a3d991bdSwdenk CONFIG_CDP_PORT_ID 1632a3d991bdSwdenk 1633a3d991bdSwdenk A printf format string which contains the ascii name of 1634a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 163511ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1636a3d991bdSwdenk 1637a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1638a3d991bdSwdenk 1639a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1640a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1641a3d991bdSwdenk 1642a3d991bdSwdenk CONFIG_CDP_VERSION 1643a3d991bdSwdenk 1644a3d991bdSwdenk An ascii string containing the version of the software. 1645a3d991bdSwdenk 1646a3d991bdSwdenk CONFIG_CDP_PLATFORM 1647a3d991bdSwdenk 1648a3d991bdSwdenk An ascii string containing the name of the platform. 1649a3d991bdSwdenk 1650a3d991bdSwdenk CONFIG_CDP_TRIGGER 1651a3d991bdSwdenk 1652a3d991bdSwdenk A 32bit integer sent on the trigger. 1653a3d991bdSwdenk 1654a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1655a3d991bdSwdenk 1656a3d991bdSwdenk A 16bit integer containing the power consumption of the 1657a3d991bdSwdenk device in .1 of milliwatts. 1658a3d991bdSwdenk 1659a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1660a3d991bdSwdenk 1661a3d991bdSwdenk A byte containing the id of the VLAN. 1662a3d991bdSwdenk 166379267eddSUri Mashiach- Status LED: CONFIG_LED_STATUS 1664c609719bSwdenk 1665c609719bSwdenk Several configurations allow to display the current 1666c609719bSwdenk status using a LED. For instance, the LED will blink 1667c609719bSwdenk fast while running U-Boot code, stop blinking as 1668c609719bSwdenk soon as a reply to a BOOTP request was received, and 1669c609719bSwdenk start blinking slow once the Linux kernel is running 1670c609719bSwdenk (supported by a status LED driver in the Linux 167179267eddSUri Mashiach kernel). Defining CONFIG_LED_STATUS enables this 1672c609719bSwdenk feature in U-Boot. 1673c609719bSwdenk 16741df7bbbaSIgor Grinberg Additional options: 16751df7bbbaSIgor Grinberg 167679267eddSUri Mashiach CONFIG_LED_STATUS_GPIO 16771df7bbbaSIgor Grinberg The status LED can be connected to a GPIO pin. 16781df7bbbaSIgor Grinberg In such cases, the gpio_led driver can be used as a 167979267eddSUri Mashiach status LED backend implementation. Define CONFIG_LED_STATUS_GPIO 16801df7bbbaSIgor Grinberg to include the gpio_led driver in the U-Boot binary. 16811df7bbbaSIgor Grinberg 16829dfdcdfeSIgor Grinberg CONFIG_GPIO_LED_INVERTED_TABLE 16839dfdcdfeSIgor Grinberg Some GPIO connected LEDs may have inverted polarity in which 16849dfdcdfeSIgor Grinberg case the GPIO high value corresponds to LED off state and 16859dfdcdfeSIgor Grinberg GPIO low value corresponds to LED on state. 16869dfdcdfeSIgor Grinberg In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined 16879dfdcdfeSIgor Grinberg with a list of GPIO LEDs that have inverted polarity. 16889dfdcdfeSIgor Grinberg 16893f4978c7SHeiko Schocher- I2C Support: CONFIG_SYS_I2C 1690c609719bSwdenk 16913f4978c7SHeiko Schocher This enable the NEW i2c subsystem, and will allow you to use 16923f4978c7SHeiko Schocher i2c commands at the u-boot command line (as long as you set 16933f4978c7SHeiko Schocher CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c 16943f4978c7SHeiko Schocher based realtime clock chips or other i2c devices. See 16953f4978c7SHeiko Schocher common/cmd_i2c.c for a description of the command line 16963f4978c7SHeiko Schocher interface. 16973f4978c7SHeiko Schocher 16983f4978c7SHeiko Schocher ported i2c driver to the new framework: 1699ea818dbbSHeiko Schocher - drivers/i2c/soft_i2c.c: 1700ea818dbbSHeiko Schocher - activate first bus with CONFIG_SYS_I2C_SOFT define 1701ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE 1702ea818dbbSHeiko Schocher for defining speed and slave address 1703ea818dbbSHeiko Schocher - activate second bus with I2C_SOFT_DECLARATIONS2 define 1704ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 1705ea818dbbSHeiko Schocher for defining speed and slave address 1706ea818dbbSHeiko Schocher - activate third bus with I2C_SOFT_DECLARATIONS3 define 1707ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 1708ea818dbbSHeiko Schocher for defining speed and slave address 1709ea818dbbSHeiko Schocher - activate fourth bus with I2C_SOFT_DECLARATIONS4 define 1710ea818dbbSHeiko Schocher CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 1711ea818dbbSHeiko Schocher for defining speed and slave address 17123f4978c7SHeiko Schocher 171300f792e0SHeiko Schocher - drivers/i2c/fsl_i2c.c: 171400f792e0SHeiko Schocher - activate i2c driver with CONFIG_SYS_I2C_FSL 171500f792e0SHeiko Schocher define CONFIG_SYS_FSL_I2C_OFFSET for setting the register 171600f792e0SHeiko Schocher offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and 171700f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first 171800f792e0SHeiko Schocher bus. 171900f792e0SHeiko Schocher - If your board supports a second fsl i2c bus, define 172000f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_OFFSET for the register offset 172100f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SPEED for the speed and 172200f792e0SHeiko Schocher CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the 172300f792e0SHeiko Schocher second bus. 172400f792e0SHeiko Schocher 17251f2ba722SSimon Glass - drivers/i2c/tegra_i2c.c: 17261f2ba722SSimon Glass - activate this driver with CONFIG_SYS_I2C_TEGRA 17271f2ba722SSimon Glass - This driver adds 4 i2c buses with a fix speed from 17281f2ba722SSimon Glass 100000 and the slave addr 0! 17291f2ba722SSimon Glass 1730880540deSDirk Eibach - drivers/i2c/ppc4xx_i2c.c 1731880540deSDirk Eibach - activate this driver with CONFIG_SYS_I2C_PPC4XX 1732880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 1733880540deSDirk Eibach - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 1734880540deSDirk Eibach 1735fac96408Strem - drivers/i2c/i2c_mxc.c 1736fac96408Strem - activate this driver with CONFIG_SYS_I2C_MXC 173703544c66SAlbert ARIBAUD \\(3ADEV\\) - enable bus 1 with CONFIG_SYS_I2C_MXC_I2C1 173803544c66SAlbert ARIBAUD \\(3ADEV\\) - enable bus 2 with CONFIG_SYS_I2C_MXC_I2C2 173903544c66SAlbert ARIBAUD \\(3ADEV\\) - enable bus 3 with CONFIG_SYS_I2C_MXC_I2C3 174003544c66SAlbert ARIBAUD \\(3ADEV\\) - enable bus 4 with CONFIG_SYS_I2C_MXC_I2C4 1741fac96408Strem - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED 1742fac96408Strem - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE 1743fac96408Strem - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED 1744fac96408Strem - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE 1745fac96408Strem - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED 1746fac96408Strem - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE 174703544c66SAlbert ARIBAUD \\(3ADEV\\) - define speed for bus 4 with CONFIG_SYS_MXC_I2C4_SPEED 174803544c66SAlbert ARIBAUD \\(3ADEV\\) - define slave for bus 4 with CONFIG_SYS_MXC_I2C4_SLAVE 1749b445bbb4SJeremiah Mahler If those defines are not set, default value is 100000 1750fac96408Strem for speed, and 0 for slave. 1751fac96408Strem 17521086bfa9SNobuhiro Iwamatsu - drivers/i2c/rcar_i2c.c: 17531086bfa9SNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_RCAR 17541086bfa9SNobuhiro Iwamatsu - This driver adds 4 i2c buses 17551086bfa9SNobuhiro Iwamatsu 17561086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 17571086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 17581086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 17591086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 17601086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 17611086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 17621086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 17631086bfa9SNobuhiro Iwamatsu - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 17641086bfa9SNobuhiro Iwamatsu - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses 17651086bfa9SNobuhiro Iwamatsu 17662035d77dSNobuhiro Iwamatsu - drivers/i2c/sh_i2c.c: 17672035d77dSNobuhiro Iwamatsu - activate this driver with CONFIG_SYS_I2C_SH 17682035d77dSNobuhiro Iwamatsu - This driver adds from 2 to 5 i2c buses 17692035d77dSNobuhiro Iwamatsu 17702035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 17712035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 17722035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 17732035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 17742035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 17752035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 17762035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 17772035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 17782035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 17792035d77dSNobuhiro Iwamatsu - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 1780b445bbb4SJeremiah Mahler - CONFIG_SYS_I2C_SH_NUM_CONTROLLERS for number of i2c buses 17812035d77dSNobuhiro Iwamatsu 17826789e84eSHeiko Schocher - drivers/i2c/omap24xx_i2c.c 17836789e84eSHeiko Schocher - activate this driver with CONFIG_SYS_I2C_OMAP24XX 17846789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 17856789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 17866789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 17876789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 17886789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 17896789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 17906789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 17916789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 17926789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 17936789e84eSHeiko Schocher - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 17946789e84eSHeiko Schocher 17950bdffe71SHeiko Schocher - drivers/i2c/zynq_i2c.c 17960bdffe71SHeiko Schocher - activate this driver with CONFIG_SYS_I2C_ZYNQ 17970bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting 17980bdffe71SHeiko Schocher - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr 17990bdffe71SHeiko Schocher 1800e717fc6dSNaveen Krishna Ch - drivers/i2c/s3c24x0_i2c.c: 1801e717fc6dSNaveen Krishna Ch - activate this driver with CONFIG_SYS_I2C_S3C24X0 1802e717fc6dSNaveen Krishna Ch - This driver adds i2c buses (11 for Exynos5250, Exynos5420 1803e717fc6dSNaveen Krishna Ch 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) 1804e717fc6dSNaveen Krishna Ch with a fix speed from 100000 and the slave addr 0! 1805e717fc6dSNaveen Krishna Ch 1806b46226bdSDirk Eibach - drivers/i2c/ihs_i2c.c 1807b46226bdSDirk Eibach - activate this driver with CONFIG_SYS_I2C_IHS 1808b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0 1809b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0 1810b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0 1811b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1 1812b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1 1813b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1 1814b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2 1815b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2 1816b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2 1817b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3 1818b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3 1819b46226bdSDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3 1820071be896SDirk Eibach - activate dual channel with CONFIG_SYS_I2C_IHS_DUAL 1821071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_0_1 speed channel 0_1 1822071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_0_1 slave addr channel 0_1 1823071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_1_1 speed channel 1_1 1824071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_1_1 slave addr channel 1_1 1825071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_2_1 speed channel 2_1 1826071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_2_1 slave addr channel 2_1 1827071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SPEED_3_1 speed channel 3_1 1828071be896SDirk Eibach - CONFIG_SYS_I2C_IHS_SLAVE_3_1 slave addr channel 3_1 1829b46226bdSDirk Eibach 18303f4978c7SHeiko Schocher additional defines: 18313f4978c7SHeiko Schocher 18323f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES 1833945a18e6SSimon Glass Hold the number of i2c buses you want to use. 18343f4978c7SHeiko Schocher 18353f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS 18363f4978c7SHeiko Schocher define this, if you don't use i2c muxes on your hardware. 18373f4978c7SHeiko Schocher if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can 18383f4978c7SHeiko Schocher omit this define. 18393f4978c7SHeiko Schocher 18403f4978c7SHeiko Schocher CONFIG_SYS_I2C_MAX_HOPS 18413f4978c7SHeiko Schocher define how many muxes are maximal consecutively connected 18423f4978c7SHeiko Schocher on one i2c bus. If you not use i2c muxes, omit this 18433f4978c7SHeiko Schocher define. 18443f4978c7SHeiko Schocher 18453f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES 1846b445bbb4SJeremiah Mahler hold a list of buses you want to use, only used if 18473f4978c7SHeiko Schocher CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example 18483f4978c7SHeiko Schocher a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and 18493f4978c7SHeiko Schocher CONFIG_SYS_NUM_I2C_BUSES = 9: 18503f4978c7SHeiko Schocher 18513f4978c7SHeiko Schocher CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ 18523f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ 18533f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ 18543f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ 18553f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ 18563f4978c7SHeiko Schocher {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ 18573f4978c7SHeiko Schocher {1, {I2C_NULL_HOP}}, \ 18583f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ 18593f4978c7SHeiko Schocher {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ 18603f4978c7SHeiko Schocher } 18613f4978c7SHeiko Schocher 18623f4978c7SHeiko Schocher which defines 18633f4978c7SHeiko Schocher bus 0 on adapter 0 without a mux 1864ea818dbbSHeiko Schocher bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 1865ea818dbbSHeiko Schocher bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 1866ea818dbbSHeiko Schocher bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 1867ea818dbbSHeiko Schocher bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 1868ea818dbbSHeiko Schocher bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 18693f4978c7SHeiko Schocher bus 6 on adapter 1 without a mux 1870ea818dbbSHeiko Schocher bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 1871ea818dbbSHeiko Schocher bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 18723f4978c7SHeiko Schocher 18733f4978c7SHeiko Schocher If you do not have i2c muxes on your board, omit this define. 18743f4978c7SHeiko Schocher 1875ce3b5d69SSimon Glass- Legacy I2C Support: 1876ea818dbbSHeiko Schocher If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) 1877b37c7e5eSwdenk then the following macros need to be defined (examples are 1878b37c7e5eSwdenk from include/configs/lwmon.h): 1879c609719bSwdenk 1880c609719bSwdenk I2C_INIT 1881c609719bSwdenk 1882b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1883c609719bSwdenk controller or configure ports. 1884c609719bSwdenk 1885b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1886b37c7e5eSwdenk 1887c609719bSwdenk I2C_ACTIVE 1888c609719bSwdenk 1889c609719bSwdenk The code necessary to make the I2C data line active 1890c609719bSwdenk (driven). If the data line is open collector, this 1891c609719bSwdenk define can be null. 1892c609719bSwdenk 1893b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1894b37c7e5eSwdenk 1895c609719bSwdenk I2C_TRISTATE 1896c609719bSwdenk 1897c609719bSwdenk The code necessary to make the I2C data line tri-stated 1898c609719bSwdenk (inactive). If the data line is open collector, this 1899c609719bSwdenk define can be null. 1900c609719bSwdenk 1901b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1902b37c7e5eSwdenk 1903c609719bSwdenk I2C_READ 1904c609719bSwdenk 1905472d5460SYork Sun Code that returns true if the I2C data line is high, 1906472d5460SYork Sun false if it is low. 1907c609719bSwdenk 1908b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1909b37c7e5eSwdenk 1910c609719bSwdenk I2C_SDA(bit) 1911c609719bSwdenk 1912472d5460SYork Sun If <bit> is true, sets the I2C data line high. If it 1913472d5460SYork Sun is false, it clears it (low). 1914c609719bSwdenk 1915b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1916b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1917b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1918b37c7e5eSwdenk 1919c609719bSwdenk I2C_SCL(bit) 1920c609719bSwdenk 1921472d5460SYork Sun If <bit> is true, sets the I2C clock line high. If it 1922472d5460SYork Sun is false, it clears it (low). 1923c609719bSwdenk 1924b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1925b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1926b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1927b37c7e5eSwdenk 1928c609719bSwdenk I2C_DELAY 1929c609719bSwdenk 1930c609719bSwdenk This delay is invoked four times per clock cycle so this 1931c609719bSwdenk controls the rate of data transfer. The data rate thus 1932b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1933b37c7e5eSwdenk like: 1934b37c7e5eSwdenk 1935b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1936c609719bSwdenk 1937793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1938793b5726SMike Frysinger 1939793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1940793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1941793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1942793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1943793b5726SMike Frysinger 1944793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1945793b5726SMike Frysinger the generic GPIO functions. 1946793b5726SMike Frysinger 19476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 194847cd00faSwdenk 194947cd00faSwdenk When a board is reset during an i2c bus transfer 195047cd00faSwdenk chips might think that the current transfer is still 195147cd00faSwdenk in progress. On some boards it is possible to access 195247cd00faSwdenk the i2c SCLK line directly, either by using the 195347cd00faSwdenk processor pin as a GPIO or by having a second pin 195447cd00faSwdenk connected to the bus. If this option is defined a 195547cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 195647cd00faSwdenk is run early in the boot sequence. 195747cd00faSwdenk 1958bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1959bb99ad6dSBen Warren 1960bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1961bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1962bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1963bb99ad6dSBen Warren Note that bus numbering is zero-based. 1964bb99ad6dSBen Warren 19656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1966bb99ad6dSBen Warren 1967bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 19680f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 19690f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 19700f89c54bSPeter Tyser a 1D array of device addresses 1971bb99ad6dSBen Warren 1972bb99ad6dSBen Warren e.g. 1973bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 19746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1975bb99ad6dSBen Warren 1976bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1977bb99ad6dSBen Warren 1978bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1979945a18e6SSimon Glass #define CONFIG_SYS_I2C_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1980bb99ad6dSBen Warren 1981bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1982bb99ad6dSBen Warren 19836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1984be5e6181STimur Tabi 1985be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1986be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1987be5e6181STimur Tabi 19886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 19890dc018ecSStefan Roese 19900dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 19910dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 19920dc018ecSStefan Roese 19932ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 19942ac6985aSAndrew Dyer 19952ac6985aSAndrew Dyer defining this will force the i2c_read() function in 19962ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 19972ac6985aSAndrew Dyer between writing the address pointer and reading the 19982ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 19992ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 20002ac6985aSAndrew Dyer devices can use either method, but some require one or 20012ac6985aSAndrew Dyer the other. 2002be5e6181STimur Tabi 2003c609719bSwdenk- SPI Support: CONFIG_SPI 2004c609719bSwdenk 2005c609719bSwdenk Enables SPI driver (so far only tested with 2006c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2007c609719bSwdenk D/As on the SACSng board) 2008c609719bSwdenk 20096639562eSYoshihiro Shimoda CONFIG_SH_SPI 20106639562eSYoshihiro Shimoda 20116639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 20126639562eSYoshihiro Shimoda only SH7757 is supported. 20136639562eSYoshihiro Shimoda 2014c609719bSwdenk CONFIG_SOFT_SPI 2015c609719bSwdenk 2016c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2017c609719bSwdenk using hardware support. This is a general purpose 2018c609719bSwdenk driver that only requires three general I/O port pins 2019c609719bSwdenk (two outputs, one input) to function. If this is 2020c609719bSwdenk defined, the board configuration must define several 2021c609719bSwdenk SPI configuration items (port pins to use, etc). For 2022c609719bSwdenk an example, see include/configs/sacsng.h. 2023c609719bSwdenk 202404a9e118SBen Warren CONFIG_HARD_SPI 202504a9e118SBen Warren 202604a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 202704a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 202804a9e118SBen Warren must define a list of chip-select function pointers. 202904a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 203004a9e118SBen Warren example, see include/configs/mpc8349emds.h. 203104a9e118SBen Warren 203238254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 203338254f45SGuennadi Liakhovetski 203438254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 20352e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 203638254f45SGuennadi Liakhovetski 2037f659b573SHeiko Schocher CONFIG_SYS_SPI_MXC_WAIT 2038f659b573SHeiko Schocher Timeout for waiting until spi transfer completed. 2039f659b573SHeiko Schocher default: (CONFIG_SYS_HZ/100) /* 10 ms */ 2040f659b573SHeiko Schocher 20410133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 20420133502eSMatthias Fuchs 20430133502eSMatthias Fuchs Enables FPGA subsystem. 20440133502eSMatthias Fuchs 20450133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 20460133502eSMatthias Fuchs 20470133502eSMatthias Fuchs Enables support for specific chip vendors. 20480133502eSMatthias Fuchs (ALTERA, XILINX) 20490133502eSMatthias Fuchs 20500133502eSMatthias Fuchs CONFIG_FPGA_<family> 20510133502eSMatthias Fuchs 20520133502eSMatthias Fuchs Enables support for FPGA family. 20530133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 20540133502eSMatthias Fuchs 20550133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2056c609719bSwdenk 2057c609719bSwdenk Specify the number of FPGA devices to support. 2058c609719bSwdenk 20596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2060c609719bSwdenk 2061c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2062c609719bSwdenk 20636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2064c609719bSwdenk 2065c609719bSwdenk Enable checks on FPGA configuration interface busy 2066c609719bSwdenk status by the configuration function. This option 2067c609719bSwdenk will require a board or device specific function to 2068c609719bSwdenk be written. 2069c609719bSwdenk 2070c609719bSwdenk CONFIG_FPGA_DELAY 2071c609719bSwdenk 2072c609719bSwdenk If defined, a function that provides delays in the FPGA 2073c609719bSwdenk configuration driver. 2074c609719bSwdenk 20756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2076c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2077c609719bSwdenk 20786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2079c609719bSwdenk 2080c609719bSwdenk Check for configuration errors during FPGA bitfile 2081c609719bSwdenk loading. For example, abort during Virtex II 2082c609719bSwdenk configuration if the INIT_B line goes low (which 2083c609719bSwdenk indicated a CRC error). 2084c609719bSwdenk 20856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2086c609719bSwdenk 2087b445bbb4SJeremiah Mahler Maximum time to wait for the INIT_B line to de-assert 2088b445bbb4SJeremiah Mahler after PROB_B has been de-asserted during a Virtex II 2089c609719bSwdenk FPGA configuration sequence. The default time is 500 209011ccc33fSMarcel Ziswiler ms. 2091c609719bSwdenk 20926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2093c609719bSwdenk 2094b445bbb4SJeremiah Mahler Maximum time to wait for BUSY to de-assert during 209511ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2096c609719bSwdenk 20976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2098c609719bSwdenk 2099c609719bSwdenk Time to wait after FPGA configuration. The default is 210011ccc33fSMarcel Ziswiler 200 ms. 2101c609719bSwdenk 2102c609719bSwdenk- Configuration Management: 2103b2b8a696SStefan Roese CONFIG_BUILD_TARGET 2104b2b8a696SStefan Roese 2105b2b8a696SStefan Roese Some SoCs need special image types (e.g. U-Boot binary 2106b2b8a696SStefan Roese with a special header) as build targets. By defining 2107b2b8a696SStefan Roese CONFIG_BUILD_TARGET in the SoC / board header, this 2108b2b8a696SStefan Roese special image will be automatically built upon calling 21096de80f21SSimon Glass make / buildman. 2110b2b8a696SStefan Roese 2111c609719bSwdenk CONFIG_IDENT_STRING 2112c609719bSwdenk 2113c609719bSwdenk If defined, this string will be added to the U-Boot 2114c609719bSwdenk version information (U_BOOT_VERSION) 2115c609719bSwdenk 2116c609719bSwdenk- Vendor Parameter Protection: 2117c609719bSwdenk 2118c609719bSwdenk U-Boot considers the values of the environment 2119c609719bSwdenk variables "serial#" (Board Serial Number) and 21207152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2121c609719bSwdenk are set once by the board vendor / manufacturer, and 2122c609719bSwdenk protects these variables from casual modification by 2123c609719bSwdenk the user. Once set, these variables are read-only, 2124c609719bSwdenk and write or delete attempts are rejected. You can 212511ccc33fSMarcel Ziswiler change this behaviour: 2126c609719bSwdenk 2127c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2128c609719bSwdenk file, the write protection for vendor parameters is 212947cd00faSwdenk completely disabled. Anybody can change or delete 2130c609719bSwdenk these parameters. 2131c609719bSwdenk 213292ac5208SJoe Hershberger Alternatively, if you define _both_ an ethaddr in the 213392ac5208SJoe Hershberger default env _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 213411ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2135c609719bSwdenk which can be changed exactly ONCE by the user. [The 2136c609719bSwdenk serial# is unaffected by this, i. e. it remains 2137c609719bSwdenk read-only.] 2138c609719bSwdenk 21392598090bSJoe Hershberger The same can be accomplished in a more flexible way 21402598090bSJoe Hershberger for any variable by configuring the type of access 21412598090bSJoe Hershberger to allow for those variables in the ".flags" variable 21422598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 21432598090bSJoe Hershberger 2144c609719bSwdenk- Protected RAM: 2145c609719bSwdenk CONFIG_PRAM 2146c609719bSwdenk 2147c609719bSwdenk Define this variable to enable the reservation of 2148c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2149c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2150c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2151c609719bSwdenk this default value by defining an environment 2152c609719bSwdenk variable "pram" to the number of kB you want to 2153c609719bSwdenk reserve. Note that the board info structure will 2154c609719bSwdenk still show the full amount of RAM. If pRAM is 2155c609719bSwdenk reserved, a new environment variable "mem" will 2156c609719bSwdenk automatically be defined to hold the amount of 2157c609719bSwdenk remaining RAM in a form that can be passed as boot 2158c609719bSwdenk argument to Linux, for instance like that: 2159c609719bSwdenk 2160fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2161c609719bSwdenk saveenv 2162c609719bSwdenk 2163c609719bSwdenk This way you can tell Linux not to use this memory, 2164c609719bSwdenk either, which results in a memory region that will 2165c609719bSwdenk not be affected by reboots. 2166c609719bSwdenk 2167c609719bSwdenk *WARNING* If your board configuration uses automatic 2168c609719bSwdenk detection of the RAM size, you must make sure that 2169c609719bSwdenk this memory test is non-destructive. So far, the 2170c609719bSwdenk following board configurations are known to be 2171c609719bSwdenk "pRAM-clean": 2172c609719bSwdenk 21735b8e76c3SHeiko Schocher IVMS8, IVML24, SPD8xx, 21741b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 21752eb48ff7SHeiko Schocher FLAGADM 2176c609719bSwdenk 217740fef049SGabe Black- Access to physical memory region (> 4GB) 217840fef049SGabe Black Some basic support is provided for operations on memory not 217940fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 218040fef049SGabe Black support access to more than 4GB of memory on 32-bit 218140fef049SGabe Black machines using physical address extension or similar. 218240fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 218340fef049SGabe Black currently only supports clearing the memory. 218440fef049SGabe Black 2185c609719bSwdenk- Error Recovery: 2186c609719bSwdenk CONFIG_PANIC_HANG 2187c609719bSwdenk 2188c609719bSwdenk Define this variable to stop the system in case of a 2189c609719bSwdenk fatal error, so that you have to reset it manually. 2190c609719bSwdenk This is probably NOT a good idea for an embedded 219111ccc33fSMarcel Ziswiler system where you want the system to reboot 2192c609719bSwdenk automatically as fast as possible, but it may be 2193c609719bSwdenk useful during development since you can try to debug 2194c609719bSwdenk the conditions that lead to the situation. 2195c609719bSwdenk 2196c609719bSwdenk CONFIG_NET_RETRY_COUNT 2197c609719bSwdenk 2198c609719bSwdenk This variable defines the number of retries for 2199c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2200c609719bSwdenk before giving up the operation. If not defined, a 2201c609719bSwdenk default value of 5 is used. 2202c609719bSwdenk 220340cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 220440cb90eeSGuennadi Liakhovetski 220540cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 220640cb90eeSGuennadi Liakhovetski 220748a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 220848a3e999STetsuyuki Kobayashi 220948a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 221048a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 221148a3e999STetsuyuki Kobayashi try longer timeout such as 221248a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 221348a3e999STetsuyuki Kobayashi 2214c609719bSwdenk- Command Interpreter: 22158078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 221604a85b3bSwdenk 221704a85b3bSwdenk Enable auto completion of commands using TAB. 221804a85b3bSwdenk 22196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2220c609719bSwdenk 2221c609719bSwdenk This defines the secondary prompt string, which is 2222c609719bSwdenk printed when the command interpreter needs more input 2223c609719bSwdenk to complete a command. Usually "> ". 2224c609719bSwdenk 2225c609719bSwdenk Note: 2226c609719bSwdenk 2227c609719bSwdenk In the current implementation, the local variables 2228c609719bSwdenk space and global environment variables space are 2229c609719bSwdenk separated. Local variables are those you define by 22303b57fe0aSwdenk simply typing `name=value'. To access a local 2231c609719bSwdenk variable later on, you have write `$name' or 22323b57fe0aSwdenk `${name}'; to execute the contents of a variable 22333b57fe0aSwdenk directly type `$name' at the command prompt. 2234c609719bSwdenk 2235c609719bSwdenk Global environment variables are those you use 2236c609719bSwdenk setenv/printenv to work with. To run a command stored 2237c609719bSwdenk in such a variable, you need to use the run command, 2238c609719bSwdenk and you must not use the '$' sign to access them. 2239c609719bSwdenk 2240c609719bSwdenk To store commands and special characters in a 2241c609719bSwdenk variable, please use double quotation marks 2242c609719bSwdenk surrounding the whole text of the variable, instead 2243c609719bSwdenk of the backslashes before semicolons and special 2244c609719bSwdenk symbols. 2245c609719bSwdenk 2246b445bbb4SJeremiah Mahler- Command Line Editing and History: 2247aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2248aa0c71acSWolfgang Denk 224911ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2250aa0c71acSWolfgang Denk command line input operations 2251aa0c71acSWolfgang Denk 2252f3b267b3SMarek Vasut- Command Line PS1/PS2 support: 2253f3b267b3SMarek Vasut CONFIG_CMDLINE_PS_SUPPORT 2254f3b267b3SMarek Vasut 2255f3b267b3SMarek Vasut Enable support for changing the command prompt string 2256f3b267b3SMarek Vasut at run-time. Only static string is supported so far. 2257f3b267b3SMarek Vasut The string is obtained from environment variables PS1 2258f3b267b3SMarek Vasut and PS2. 2259f3b267b3SMarek Vasut 2260a8c7c708Swdenk- Default Environment: 2261c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2262c609719bSwdenk 2263c609719bSwdenk Define this to contain any number of null terminated 2264c609719bSwdenk strings (variable = value pairs) that will be part of 22657152b1d0Swdenk the default environment compiled into the boot image. 22662262cfeeSwdenk 2267c609719bSwdenk For example, place something like this in your 2268c609719bSwdenk board's config file: 2269c609719bSwdenk 2270c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2271c609719bSwdenk "myvar1=value1\0" \ 2272c609719bSwdenk "myvar2=value2\0" 2273c609719bSwdenk 2274c609719bSwdenk Warning: This method is based on knowledge about the 2275c609719bSwdenk internal format how the environment is stored by the 22762262cfeeSwdenk U-Boot code. This is NOT an official, exported 2277c609719bSwdenk interface! Although it is unlikely that this format 22787152b1d0Swdenk will change soon, there is no guarantee either. 2279c609719bSwdenk You better know what you are doing here. 2280c609719bSwdenk 2281c609719bSwdenk Note: overly (ab)use of the default environment is 2282c609719bSwdenk discouraged. Make sure to check other ways to preset 228374de7aefSWolfgang Denk the environment like the "source" command or the 2284c609719bSwdenk boot command first. 2285c609719bSwdenk 22865e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 22875e724ca2SStephen Warren 22885e724ca2SStephen Warren Define this in order to add variables describing the 22895e724ca2SStephen Warren U-Boot build configuration to the default environment. 22905e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 22915e724ca2SStephen Warren 22925e724ca2SStephen Warren Enabling this option will cause the following to be defined: 22935e724ca2SStephen Warren 22945e724ca2SStephen Warren - CONFIG_SYS_ARCH 22955e724ca2SStephen Warren - CONFIG_SYS_CPU 22965e724ca2SStephen Warren - CONFIG_SYS_BOARD 22975e724ca2SStephen Warren - CONFIG_SYS_VENDOR 22985e724ca2SStephen Warren - CONFIG_SYS_SOC 22995e724ca2SStephen Warren 23007e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 23017e27f89fSTom Rini 23027e27f89fSTom Rini Define this in order to add variables describing certain 23037e27f89fSTom Rini run-time determined information about the hardware to the 23047e27f89fSTom Rini environment. These will be named board_name, board_rev. 23057e27f89fSTom Rini 230606fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 230706fd8538SSimon Glass 230806fd8538SSimon Glass Normally the environment is loaded when the board is 2309b445bbb4SJeremiah Mahler initialised so that it is available to U-Boot. This inhibits 231006fd8538SSimon Glass that so that the environment is not available until 231106fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 231206fd8538SSimon Glass this is instead controlled by the value of 231306fd8538SSimon Glass /config/load-environment. 231406fd8538SSimon Glass 2315a8c7c708Swdenk- DataFlash Support: 23162abbe075Swdenk CONFIG_HAS_DATAFLASH 23172abbe075Swdenk 23182abbe075Swdenk Defining this option enables DataFlash features and 23192abbe075Swdenk allows to read/write in Dataflash via the standard 23202abbe075Swdenk commands cp, md... 23212abbe075Swdenk 2322f61ec45eSEric Nelson- Serial Flash support 232300fd59ddSSimon Glass Usage requires an initial 'sf probe' to define the serial 2324f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2325f61ec45eSEric Nelson commands. 2326f61ec45eSEric Nelson 2327f61ec45eSEric Nelson The following defaults may be provided by the platform 2328f61ec45eSEric Nelson to handle the common case when only a single serial 2329f61ec45eSEric Nelson flash is present on the system. 2330f61ec45eSEric Nelson 2331f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2332f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2333f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2334f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2335f61ec45eSEric Nelson 23363f85ce27Swdenk CONFIG_SYSTEMACE 23373f85ce27Swdenk 23383f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 23393f85ce27Swdenk chips attached via some sort of local bus. The address 234011ccc33fSMarcel Ziswiler of the chip must also be defined in the 23416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 23423f85ce27Swdenk 23433f85ce27Swdenk #define CONFIG_SYSTEMACE 23446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 23453f85ce27Swdenk 23463f85ce27Swdenk When SystemACE support is added, the "ace" device type 23473f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 23483f85ce27Swdenk 2349ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2350ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2351ecb0ccd9SWolfgang Denk 235228cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2353ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 235428cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2355ecb0ccd9SWolfgang Denk number generator is used. 2356ecb0ccd9SWolfgang Denk 235728cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 235828cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 235928cb9375SWolfgang Denk defined, the normal port 69 is used. 236028cb9375SWolfgang Denk 236128cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2362ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2363ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2364ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2365ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2366ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2367ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2368ecb0ccd9SWolfgang Denk 23699e50c406SHeiko Schocher- bootcount support: 23709e50c406SHeiko Schocher CONFIG_BOOTCOUNT_LIMIT 23719e50c406SHeiko Schocher 23729e50c406SHeiko Schocher This enables the bootcounter support, see: 23739e50c406SHeiko Schocher http://www.denx.de/wiki/DULG/UBootBootCountLimit 23749e50c406SHeiko Schocher 23759e50c406SHeiko Schocher CONFIG_AT91SAM9XE 23769e50c406SHeiko Schocher enable special bootcounter support on at91sam9xe based boards. 23779e50c406SHeiko Schocher CONFIG_SOC_DA8XX 23789e50c406SHeiko Schocher enable special bootcounter support on da850 based boards. 23799e50c406SHeiko Schocher CONFIG_BOOTCOUNT_RAM 23809e50c406SHeiko Schocher enable support for the bootcounter in RAM 23819e50c406SHeiko Schocher CONFIG_BOOTCOUNT_I2C 23829e50c406SHeiko Schocher enable support for the bootcounter on an i2c (like RTC) device. 23839e50c406SHeiko Schocher CONFIG_SYS_I2C_RTC_ADDR = i2c chip address 23849e50c406SHeiko Schocher CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for 23859e50c406SHeiko Schocher the bootcounter. 23869e50c406SHeiko Schocher CONFIG_BOOTCOUNT_ALEN = address len 238719c402afSSimon Glass 2388a8c7c708Swdenk- Show boot progress: 2389c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2390c609719bSwdenk 2391c609719bSwdenk Defining this option allows to add some board- 2392c609719bSwdenk specific code (calling a user-provided function 2393c609719bSwdenk "show_boot_progress(int)") that enables you to show 2394c609719bSwdenk the system's boot progress on some display (for 2395c609719bSwdenk example, some LED's) on your board. At the moment, 2396c609719bSwdenk the following checkpoints are implemented: 2397c609719bSwdenk 239894fd1316SSimon Glass 23991372cce2SMarian BalakowiczLegacy uImage format: 24001372cce2SMarian Balakowicz 2401c609719bSwdenk Arg Where When 2402c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2403c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2404c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2405c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2406c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2407c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2408c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2409c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2410c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 24111372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2412c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2413c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2414c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2415c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 24161372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2417c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 24181372cce2SMarian Balakowicz 24191372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 24201372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 24211372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 24221372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 24231372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 24241372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 24251372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 242611ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 24271372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 24281372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 24291372cce2SMarian Balakowicz 2430ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2431c609719bSwdenk 2432a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 243363e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 243463e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 243563e73c9aSwdenk 2436566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2437566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2438566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2439566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2440566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2441566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2442566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2443566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2444566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2445566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2446566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2447566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2448566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2449566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2450566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2451566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2452566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2453566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2454566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2455566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2456566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2457566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2458566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2459566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2460566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2461566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2462566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2463566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2464566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2465566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2466566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2467566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2468566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2469566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2470566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2471566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2472566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2473566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2474566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2475566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2476566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2477566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2478566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2479566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2480566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2481566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2482566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2483c609719bSwdenk 2484566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2485c609719bSwdenk 2486566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2487566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2488566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2489206c60cbSwdenk 2490566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2491bc0571fcSJoe Hershberger 80 common/cmd_net.c before calling net_loop() 2492bc0571fcSJoe Hershberger -81 common/cmd_net.c some error in net_loop() occurred 2493bc0571fcSJoe Hershberger 81 common/cmd_net.c net_loop() back without error 2494566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2495566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 249674de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 249774de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2498566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2499c609719bSwdenk 25001372cce2SMarian BalakowiczFIT uImage format: 25011372cce2SMarian Balakowicz 25021372cce2SMarian Balakowicz Arg Where When 25031372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 25041372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 25051372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 25061372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 25071372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 25081372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2509f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 25101372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 25111372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 25121372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 25131372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 25141372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 251511ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 251611ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 25171372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 25181372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 25191372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 25201372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 25211372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 25221372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 25231372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 25241372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 25251372cce2SMarian Balakowicz 25261372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 25271372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 25281372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 252911ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 25301372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 25311372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 25321372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 25331372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 25341372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 25351372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 25361372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 25371372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 25381372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 25391372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 25401372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 25411372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 25421372cce2SMarian Balakowicz 254311ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 25441372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 25451372cce2SMarian Balakowicz 254611ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 25471372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 25481372cce2SMarian Balakowicz 254911ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 25501372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 25511372cce2SMarian Balakowicz 255221d29f7fSHeiko Schocher- legacy image format: 255321d29f7fSHeiko Schocher CONFIG_IMAGE_FORMAT_LEGACY 255421d29f7fSHeiko Schocher enables the legacy image format support in U-Boot. 255521d29f7fSHeiko Schocher 255621d29f7fSHeiko Schocher Default: 255721d29f7fSHeiko Schocher enabled if CONFIG_FIT_SIGNATURE is not defined. 255821d29f7fSHeiko Schocher 255921d29f7fSHeiko Schocher CONFIG_DISABLE_IMAGE_LEGACY 256021d29f7fSHeiko Schocher disable the legacy image format 256121d29f7fSHeiko Schocher 256221d29f7fSHeiko Schocher This define is introduced, as the legacy image format is 256321d29f7fSHeiko Schocher enabled per default for backward compatibility. 256421d29f7fSHeiko Schocher 25654cf2609bSWolfgang Denk- Standalone program support: 25664cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 25674cf2609bSWolfgang Denk 25686feff899SWolfgang Denk This option defines a board specific value for the 25696feff899SWolfgang Denk address where standalone program gets loaded, thus 25706feff899SWolfgang Denk overwriting the architecture dependent default 25714cf2609bSWolfgang Denk settings. 25724cf2609bSWolfgang Denk 25734cf2609bSWolfgang Denk- Frame Buffer Address: 25744cf2609bSWolfgang Denk CONFIG_FB_ADDR 25754cf2609bSWolfgang Denk 25764cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 257744a53b57SWolfgang Denk address for frame buffer. This is typically the case 257844a53b57SWolfgang Denk when using a graphics controller has separate video 257944a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 258044a53b57SWolfgang Denk the given address instead of dynamically reserving it 258144a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 258244a53b57SWolfgang Denk the memory for the frame buffer depending on the 258344a53b57SWolfgang Denk configured panel size. 25844cf2609bSWolfgang Denk 25854cf2609bSWolfgang Denk Please see board_init_f function. 25864cf2609bSWolfgang Denk 2587cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2588cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2589cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2590cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2591cccfc2abSDetlev Zundel 2592cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2593cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2594cccfc2abSDetlev Zundel 2595cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2596cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2597cccfc2abSDetlev Zundel 2598cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2599cccfc2abSDetlev Zundel Needed for mtdparts command support. 2600cccfc2abSDetlev Zundel 2601cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2602cccfc2abSDetlev Zundel 2603cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2604cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2605cccfc2abSDetlev Zundel 260670c219cdSJoe Hershberger- UBI support 2607147162daSJoe Hershberger CONFIG_UBI_SILENCE_MSG 2608147162daSJoe Hershberger 2609147162daSJoe Hershberger Make the verbose messages from UBI stop printing. This leaves 2610147162daSJoe Hershberger warnings and errors enabled. 2611147162daSJoe Hershberger 2612ff94bc40SHeiko Schocher 2613ff94bc40SHeiko Schocher CONFIG_MTD_UBI_WL_THRESHOLD 2614ff94bc40SHeiko Schocher This parameter defines the maximum difference between the highest 2615ff94bc40SHeiko Schocher erase counter value and the lowest erase counter value of eraseblocks 2616ff94bc40SHeiko Schocher of UBI devices. When this threshold is exceeded, UBI starts performing 2617ff94bc40SHeiko Schocher wear leveling by means of moving data from eraseblock with low erase 2618ff94bc40SHeiko Schocher counter to eraseblocks with high erase counter. 2619ff94bc40SHeiko Schocher 2620ff94bc40SHeiko Schocher The default value should be OK for SLC NAND flashes, NOR flashes and 2621ff94bc40SHeiko Schocher other flashes which have eraseblock life-cycle 100000 or more. 2622ff94bc40SHeiko Schocher However, in case of MLC NAND flashes which typically have eraseblock 2623ff94bc40SHeiko Schocher life-cycle less than 10000, the threshold should be lessened (e.g., 2624ff94bc40SHeiko Schocher to 128 or 256, although it does not have to be power of 2). 2625ff94bc40SHeiko Schocher 2626ff94bc40SHeiko Schocher default: 4096 2627ff94bc40SHeiko Schocher 2628ff94bc40SHeiko Schocher CONFIG_MTD_UBI_BEB_LIMIT 2629ff94bc40SHeiko Schocher This option specifies the maximum bad physical eraseblocks UBI 2630ff94bc40SHeiko Schocher expects on the MTD device (per 1024 eraseblocks). If the 2631ff94bc40SHeiko Schocher underlying flash does not admit of bad eraseblocks (e.g. NOR 2632ff94bc40SHeiko Schocher flash), this value is ignored. 2633ff94bc40SHeiko Schocher 2634ff94bc40SHeiko Schocher NAND datasheets often specify the minimum and maximum NVM 2635ff94bc40SHeiko Schocher (Number of Valid Blocks) for the flashes' endurance lifetime. 2636ff94bc40SHeiko Schocher The maximum expected bad eraseblocks per 1024 eraseblocks 2637ff94bc40SHeiko Schocher then can be calculated as "1024 * (1 - MinNVB / MaxNVB)", 2638ff94bc40SHeiko Schocher which gives 20 for most NANDs (MaxNVB is basically the total 2639ff94bc40SHeiko Schocher count of eraseblocks on the chip). 2640ff94bc40SHeiko Schocher 2641ff94bc40SHeiko Schocher To put it differently, if this value is 20, UBI will try to 2642ff94bc40SHeiko Schocher reserve about 1.9% of physical eraseblocks for bad blocks 2643ff94bc40SHeiko Schocher handling. And that will be 1.9% of eraseblocks on the entire 2644ff94bc40SHeiko Schocher NAND chip, not just the MTD partition UBI attaches. This means 2645ff94bc40SHeiko Schocher that if you have, say, a NAND flash chip admits maximum 40 bad 2646ff94bc40SHeiko Schocher eraseblocks, and it is split on two MTD partitions of the same 2647ff94bc40SHeiko Schocher size, UBI will reserve 40 eraseblocks when attaching a 2648ff94bc40SHeiko Schocher partition. 2649ff94bc40SHeiko Schocher 2650ff94bc40SHeiko Schocher default: 20 2651ff94bc40SHeiko Schocher 2652ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP 2653ff94bc40SHeiko Schocher Fastmap is a mechanism which allows attaching an UBI device 2654ff94bc40SHeiko Schocher in nearly constant time. Instead of scanning the whole MTD device it 2655ff94bc40SHeiko Schocher only has to locate a checkpoint (called fastmap) on the device. 2656ff94bc40SHeiko Schocher The on-flash fastmap contains all information needed to attach 2657ff94bc40SHeiko Schocher the device. Using fastmap makes only sense on large devices where 2658ff94bc40SHeiko Schocher attaching by scanning takes long. UBI will not automatically install 2659ff94bc40SHeiko Schocher a fastmap on old images, but you can set the UBI parameter 2660ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT to 1 if you want so. Please note 2661ff94bc40SHeiko Schocher that fastmap-enabled images are still usable with UBI implementations 2662ff94bc40SHeiko Schocher without fastmap support. On typical flash devices the whole fastmap 2663ff94bc40SHeiko Schocher fits into one PEB. UBI will reserve PEBs to hold two fastmaps. 2664ff94bc40SHeiko Schocher 2665ff94bc40SHeiko Schocher CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 2666ff94bc40SHeiko Schocher Set this parameter to enable fastmap automatically on images 2667ff94bc40SHeiko Schocher without a fastmap. 2668ff94bc40SHeiko Schocher default: 0 2669ff94bc40SHeiko Schocher 26700195a7bbSHeiko Schocher CONFIG_MTD_UBI_FM_DEBUG 26710195a7bbSHeiko Schocher Enable UBI fastmap debug 26720195a7bbSHeiko Schocher default: 0 26730195a7bbSHeiko Schocher 267470c219cdSJoe Hershberger- UBIFS support 2675147162daSJoe Hershberger CONFIG_UBIFS_SILENCE_MSG 2676147162daSJoe Hershberger 2677147162daSJoe Hershberger Make the verbose messages from UBIFS stop printing. This leaves 2678147162daSJoe Hershberger warnings and errors enabled. 2679147162daSJoe Hershberger 26806a11cf48SDaniel Schwierzeck- SPL framework 26816a11cf48SDaniel Schwierzeck CONFIG_SPL 26826a11cf48SDaniel Schwierzeck Enable building of SPL globally. 26836a11cf48SDaniel Schwierzeck 268495579793STom Rini CONFIG_SPL_LDSCRIPT 268595579793STom Rini LDSCRIPT for linking the SPL binary. 268695579793STom Rini 26876ebc3461SAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT 26886ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL, BSS included. 26896ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory 26906ebc3461SAlbert ARIBAUD used by SPL from _start to __bss_end does not exceed it. 26918960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 26926ebc3461SAlbert ARIBAUD must not be both defined at the same time. 26936ebc3461SAlbert ARIBAUD 269495579793STom Rini CONFIG_SPL_MAX_SIZE 26956ebc3461SAlbert ARIBAUD Maximum size of the SPL image (text, data, rodata, and 26966ebc3461SAlbert ARIBAUD linker lists sections), BSS excluded. 26976ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual size does 26986ebc3461SAlbert ARIBAUD not exceed it. 269995579793STom Rini 27006a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 27016a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 27026a11cf48SDaniel Schwierzeck 270394a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 270494a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 270594a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 270694a45bb1SScott Wood 270795579793STom Rini CONFIG_SPL_BSS_START_ADDR 270895579793STom Rini Link address for the BSS within the SPL binary. 270995579793STom Rini 271095579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 27116ebc3461SAlbert ARIBAUD Maximum size in memory allocated to the SPL BSS. 27126ebc3461SAlbert ARIBAUD When defined, the linker checks that the actual memory used 27136ebc3461SAlbert ARIBAUD by SPL from __bss_start to __bss_end does not exceed it. 27148960af8bSAlbert ARIBAUD CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE 27156ebc3461SAlbert ARIBAUD must not be both defined at the same time. 271695579793STom Rini 271795579793STom Rini CONFIG_SPL_STACK 271895579793STom Rini Adress of the start of the stack SPL will use 271995579793STom Rini 27208c80eb3bSAlbert ARIBAUD \(3ADEV\) CONFIG_SPL_PANIC_ON_RAW_IMAGE 27218c80eb3bSAlbert ARIBAUD \(3ADEV\) When defined, SPL will panic() if the image it has 27228c80eb3bSAlbert ARIBAUD \(3ADEV\) loaded does not have a signature. 27238c80eb3bSAlbert ARIBAUD \(3ADEV\) Defining this is useful when code which loads images 27248c80eb3bSAlbert ARIBAUD \(3ADEV\) in SPL cannot guarantee that absolutely all read errors 27258c80eb3bSAlbert ARIBAUD \(3ADEV\) will be caught. 27268c80eb3bSAlbert ARIBAUD \(3ADEV\) An example is the LPC32XX MLC NAND driver, which will 27278c80eb3bSAlbert ARIBAUD \(3ADEV\) consider that a completely unreadable NAND block is bad, 27288c80eb3bSAlbert ARIBAUD \(3ADEV\) and thus should be skipped silently. 27298c80eb3bSAlbert ARIBAUD \(3ADEV\) 273094a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 273194a45bb1SScott Wood Adress of the start of the stack SPL will use after 273294a45bb1SScott Wood relocation. If unspecified, this is equal to 273394a45bb1SScott Wood CONFIG_SPL_STACK. 273494a45bb1SScott Wood 273595579793STom Rini CONFIG_SYS_SPL_MALLOC_START 273695579793STom Rini Starting address of the malloc pool used in SPL. 27379ac4fc82SFabio Estevam When this option is set the full malloc is used in SPL and 27389ac4fc82SFabio Estevam it is set up by spl_init() and before that, the simple malloc() 27399ac4fc82SFabio Estevam can be used if CONFIG_SYS_MALLOC_F is defined. 274095579793STom Rini 274195579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 274295579793STom Rini The size of the malloc pool used in SPL. 27436a11cf48SDaniel Schwierzeck 274447f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 274547f7bcaeSTom Rini Enable the SPL framework under common/. This framework 274647f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 274747f7bcaeSTom Rini NAND loading of the Linux Kernel. 274847f7bcaeSTom Rini 27499607faf2STom Rini CONFIG_SPL_OS_BOOT 27509607faf2STom Rini Enable booting directly to an OS from SPL. 27519607faf2STom Rini See also: doc/README.falcon 27529607faf2STom Rini 2753861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 2754861a86f4STom Rini For ARM, enable an optional function to print more information 2755861a86f4STom Rini about the running system. 2756861a86f4STom Rini 27574b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 27584b919725SScott Wood Arch init code should be built for a very small image 27594b919725SScott Wood 2760b97300b6SPaul Kocialkowski CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION 2761b97300b6SPaul Kocialkowski Partition on the MMC to load U-Boot from when the MMC is being 2762b97300b6SPaul Kocialkowski used in raw mode 2763b97300b6SPaul Kocialkowski 27642b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 27652b75b0adSPeter Korsgaard Sector to load kernel uImage from when MMC is being 27662b75b0adSPeter Korsgaard used in raw mode (for Falcon mode) 27672b75b0adSPeter Korsgaard 27682b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, 27692b75b0adSPeter Korsgaard CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 27702b75b0adSPeter Korsgaard Sector and number of sectors to load kernel argument 27712b75b0adSPeter Korsgaard parameters from when MMC is being used in raw mode 27722b75b0adSPeter Korsgaard (for falcon mode) 27732b75b0adSPeter Korsgaard 2774e2ccdf89SPaul Kocialkowski CONFIG_SYS_MMCSD_FS_BOOT_PARTITION 2775e2ccdf89SPaul Kocialkowski Partition on the MMC to load U-Boot from when the MMC is being 2776e2ccdf89SPaul Kocialkowski used in fs mode 2777e2ccdf89SPaul Kocialkowski 2778fae81c72SGuillaume GARDET CONFIG_SPL_FS_LOAD_PAYLOAD_NAME 2779fae81c72SGuillaume GARDET Filename to read to load U-Boot when reading from filesystem 2780fae81c72SGuillaume GARDET 2781fae81c72SGuillaume GARDET CONFIG_SPL_FS_LOAD_KERNEL_NAME 27827ad2cc79SPeter Korsgaard Filename to read to load kernel uImage when reading 2783fae81c72SGuillaume GARDET from filesystem (for Falcon mode) 27847ad2cc79SPeter Korsgaard 2785fae81c72SGuillaume GARDET CONFIG_SPL_FS_LOAD_ARGS_NAME 27867ad2cc79SPeter Korsgaard Filename to read to load kernel argument parameters 2787fae81c72SGuillaume GARDET when reading from filesystem (for Falcon mode) 27887ad2cc79SPeter Korsgaard 278906f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 279006f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 279106f60ae3SScott Wood start.S waits for the rest of the SPL to load before 279206f60ae3SScott Wood continuing (the hardware starts execution after just 279306f60ae3SScott Wood loading the first page rather than the full 4K). 279406f60ae3SScott Wood 2795651fcf60SPrabhakar Kushwaha CONFIG_SPL_SKIP_RELOCATE 2796651fcf60SPrabhakar Kushwaha Avoid SPL relocation 2797651fcf60SPrabhakar Kushwaha 27986f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 27996f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 28006f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 28016f2f01b9SScott Wood 28026f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 28036f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 28046f2f01b9SScott Wood 28056f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 28066f2f01b9SScott Wood Include standard software ECC in the SPL 28076f2f01b9SScott Wood 280895579793STom Rini CONFIG_SPL_NAND_SIMPLE 28097d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 28107d4b7955SScott Wood expose the cmd_ctrl() interface. 281195579793STom Rini 28126f4e7d3cSThomas Gleixner CONFIG_SPL_UBI 28136f4e7d3cSThomas Gleixner Support for a lightweight UBI (fastmap) scanner and 28146f4e7d3cSThomas Gleixner loader 28156f4e7d3cSThomas Gleixner 28160c3117b1SHeiko Schocher CONFIG_SPL_NAND_RAW_ONLY 28170c3117b1SHeiko Schocher Support to boot only raw u-boot.bin images. Use this only 28180c3117b1SHeiko Schocher if you need to save space. 28190c3117b1SHeiko Schocher 28207c8eea59SYing Zhang CONFIG_SPL_COMMON_INIT_DDR 28217c8eea59SYing Zhang Set for common ddr init with serial presence detect in 28227c8eea59SYing Zhang SPL binary. 28237c8eea59SYing Zhang 282495579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 282595579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 282695579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 282795579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 282895579793STom Rini CONFIG_SYS_NAND_ECCBYTES 282995579793STom Rini Defines the size and behavior of the NAND that SPL uses 28307d4b7955SScott Wood to read U-Boot 283195579793STom Rini 2832fbe76ae4SPrabhakar Kushwaha CONFIG_SPL_NAND_BOOT 2833fbe76ae4SPrabhakar Kushwaha Add support NAND boot 2834fbe76ae4SPrabhakar Kushwaha 283595579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 28367d4b7955SScott Wood Location in NAND to read U-Boot from 28377d4b7955SScott Wood 28387d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 28397d4b7955SScott Wood Location in memory to load U-Boot to 28407d4b7955SScott Wood 28417d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 28427d4b7955SScott Wood Size of image to load 284395579793STom Rini 284495579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 28457d4b7955SScott Wood Entry point in loaded image to jump to 284695579793STom Rini 284795579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 284895579793STom Rini Define this if you need to first read the OOB and then the 2849b445bbb4SJeremiah Mahler data. This is used, for example, on davinci platforms. 285095579793STom Rini 2851c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 2852c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 2853c57b953dSPavel Machek 285474752baaSScott Wood CONFIG_SPL_PAD_TO 28556113d3f2SBenoît Thébaudeau Image offset to which the SPL should be padded before appending 28566113d3f2SBenoît Thébaudeau the SPL payload. By default, this is defined as 28576113d3f2SBenoît Thébaudeau CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 28586113d3f2SBenoît Thébaudeau CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 28596113d3f2SBenoît Thébaudeau payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 286074752baaSScott Wood 2861ca2fca22SScott Wood CONFIG_SPL_TARGET 2862ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 2863ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 2864ca2fca22SScott Wood example if more than one image needs to be produced. 2865ca2fca22SScott Wood 286687ebee39SSimon Glass CONFIG_FIT_SPL_PRINT 286787ebee39SSimon Glass Printing information about a FIT image adds quite a bit of 286887ebee39SSimon Glass code to SPL. So this is normally disabled in SPL. Use this 286987ebee39SSimon Glass option to re-enable it. This will affect the output of the 287087ebee39SSimon Glass bootm command when booting a FIT image. 287187ebee39SSimon Glass 28723aa29de0SYing Zhang- TPL framework 28733aa29de0SYing Zhang CONFIG_TPL 28743aa29de0SYing Zhang Enable building of TPL globally. 28753aa29de0SYing Zhang 28763aa29de0SYing Zhang CONFIG_TPL_PAD_TO 28773aa29de0SYing Zhang Image offset to which the TPL should be padded before appending 28783aa29de0SYing Zhang the TPL payload. By default, this is defined as 28793aa29de0SYing Zhang CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. 28803aa29de0SYing Zhang CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL 28813aa29de0SYing Zhang payload without any padding, or >= CONFIG_SPL_MAX_SIZE. 28823aa29de0SYing Zhang 2883a8c7c708Swdenk- Interrupt support (PPC): 2884a8c7c708Swdenk 2885a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2886a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 288711ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2888a8c7c708Swdenk should set decrementer_count to appropriate value. If 288911ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2890a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 289111ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2892a8c7c708Swdenk specific handling. If board has watchdog / status_led 2893a8c7c708Swdenk / other_activity_monitor it works automatically from 2894a8c7c708Swdenk general timer_interrupt(). 2895a8c7c708Swdenk 2896c609719bSwdenk 28979660e442SHelmut RaigerBoard initialization settings: 28989660e442SHelmut Raiger------------------------------ 28999660e442SHelmut Raiger 29009660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 29019660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 29029660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 29039660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 29049660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 29059660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 29069660e442SHelmut Raiger 29079660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 29089660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 29099660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 29109660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2911c609719bSwdenk 2912c609719bSwdenkConfiguration Settings: 2913c609719bSwdenk----------------------- 2914c609719bSwdenk 29154d1fd7f1SYork Sun- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. 29164d1fd7f1SYork Sun Optionally it can be defined to support 64-bit memory commands. 29174d1fd7f1SYork Sun 29186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2919c609719bSwdenk undefine this when you're short of memory. 2920c609719bSwdenk 29212fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 29222fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 29232fb2604dSPeter Tyser 29246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2925c609719bSwdenk prompt for user input. 2926c609719bSwdenk 29276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2928c609719bSwdenk 29296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2930c609719bSwdenk 29316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2932c609719bSwdenk 29336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2934c609719bSwdenk the application (usually a Linux kernel) when it is 2935c609719bSwdenk booted 2936c609719bSwdenk 29376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2938c609719bSwdenk List of legal baudrate settings for this board. 2939c609719bSwdenk 29406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2941c609719bSwdenk Begin and End addresses of the area used by the 2942c609719bSwdenk simple memory test. 2943c609719bSwdenk 29446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2945c609719bSwdenk Enable an alternate, more extensive memory test. 2946c609719bSwdenk 29476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 29485f535fe1Swdenk Scratch address used by the alternate memory test 29495f535fe1Swdenk You only need to set this if address zero isn't writeable 29505f535fe1Swdenk 2951e8149522SYork Sun- CONFIG_SYS_MEM_RESERVE_SECURE 2952e61a7534SYork Sun Only implemented for ARMv8 for now. 2953e8149522SYork Sun If defined, the size of CONFIG_SYS_MEM_RESERVE_SECURE memory 2954e8149522SYork Sun is substracted from total RAM and won't be reported to OS. 2955e8149522SYork Sun This memory can be used as secure memory. A variable 2956e61a7534SYork Sun gd->arch.secure_ram is used to track the location. In systems 2957e8149522SYork Sun the RAM base is not zero, or RAM is divided into banks, 2958e8149522SYork Sun this variable needs to be recalcuated to get the address. 2959e8149522SYork Sun 2960aabd7ddbSYork Sun- CONFIG_SYS_MEM_TOP_HIDE: 29616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 296214f73ca6SStefan Roese this specified memory area will get subtracted from the top 296311ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 296414f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 296514f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 296614f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 29675e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 296814f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 29695e12e75dSStefan Roese will have to get fixed in Linux additionally. 297014f73ca6SStefan Roese 297114f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 297214f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 297314f73ca6SStefan Roese be touched. 297414f73ca6SStefan Roese 297514f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 297614f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 297714f73ca6SStefan Roese then the end address of the Linux memory will be located at a 297814f73ca6SStefan Roese non page size aligned address and this could cause major 297914f73ca6SStefan Roese problems. 298014f73ca6SStefan Roese 29816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2982c609719bSwdenk Enable temporary baudrate change while serial download 2983c609719bSwdenk 29846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2985c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2986c609719bSwdenk 29876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2988c609719bSwdenk Physical start address of Flash memory. 2989c609719bSwdenk 29906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2991c609719bSwdenk Physical start address of boot monitor code (set by 2992c609719bSwdenk make config files to be same as the text base address 299314d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 29946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2995c609719bSwdenk 29966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 29973b57fe0aSwdenk Size of memory reserved for monitor code, used to 29983b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 29993b57fe0aSwdenk embedded within the U-Boot image, or in a separate 30003b57fe0aSwdenk flash sector. 3001c609719bSwdenk 30026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3003c609719bSwdenk Size of DRAM reserved for malloc() use. 3004c609719bSwdenk 3005d59476b6SSimon Glass- CONFIG_SYS_MALLOC_F_LEN 3006d59476b6SSimon Glass Size of the malloc() pool for use before relocation. If 3007d59476b6SSimon Glass this is defined, then a very simple malloc() implementation 3008d59476b6SSimon Glass will become available before relocation. The address is just 3009d59476b6SSimon Glass below the global data, and the stack is moved down to make 3010d59476b6SSimon Glass space. 3011d59476b6SSimon Glass 3012d59476b6SSimon Glass This feature allocates regions with increasing addresses 3013d59476b6SSimon Glass within the region. calloc() is supported, but realloc() 3014d59476b6SSimon Glass is not available. free() is supported but does nothing. 3015b445bbb4SJeremiah Mahler The memory will be freed (or in fact just forgotten) when 3016d59476b6SSimon Glass U-Boot relocates itself. 3017d59476b6SSimon Glass 301838687ae6SSimon Glass- CONFIG_SYS_MALLOC_SIMPLE 301938687ae6SSimon Glass Provides a simple and small malloc() and calloc() for those 302038687ae6SSimon Glass boards which do not use the full malloc in SPL (which is 302138687ae6SSimon Glass enabled with CONFIG_SYS_SPL_MALLOC_START). 302238687ae6SSimon Glass 30231dfdd9baSThierry Reding- CONFIG_SYS_NONCACHED_MEMORY: 30241dfdd9baSThierry Reding Size of non-cached memory area. This area of memory will be 30251dfdd9baSThierry Reding typically located right below the malloc() area and mapped 30261dfdd9baSThierry Reding uncached in the MMU. This is useful for drivers that would 30271dfdd9baSThierry Reding otherwise require a lot of explicit cache maintenance. For 30281dfdd9baSThierry Reding some drivers it's also impossible to properly maintain the 30291dfdd9baSThierry Reding cache. For example if the regions that need to be flushed 30301dfdd9baSThierry Reding are not a multiple of the cache-line size, *and* padding 30311dfdd9baSThierry Reding cannot be allocated between the regions to align them (i.e. 30321dfdd9baSThierry Reding if the HW requires a contiguous array of regions, and the 30331dfdd9baSThierry Reding size of each region is not cache-aligned), then a flush of 30341dfdd9baSThierry Reding one region may result in overwriting data that hardware has 30351dfdd9baSThierry Reding written to another region in the same cache-line. This can 30361dfdd9baSThierry Reding happen for example in network drivers where descriptors for 30371dfdd9baSThierry Reding buffers are typically smaller than the CPU cache-line (e.g. 30381dfdd9baSThierry Reding 16 bytes vs. 32 or 64 bytes). 30391dfdd9baSThierry Reding 30401dfdd9baSThierry Reding Non-cached memory is only supported on 32-bit ARM at present. 30411dfdd9baSThierry Reding 30426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 304315940c9aSStefan Roese Normally compressed uImages are limited to an 304415940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 30456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 304615940c9aSStefan Roese to adjust this setting to your needs. 3047c609719bSwdenk 30486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3049c609719bSwdenk Maximum size of memory mapped by the startup code of 3050c609719bSwdenk the Linux kernel; all data that must be processed by 30517d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 30527d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 30531bce2aebSRobert P. J. Day environment variable is defined and non-zero. In such case 30547d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3055c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3056c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3057c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3058c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3059c609719bSwdenk 3060fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3061fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3062fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3063fca43cc8SJohn Rigby is enabled. 3064fca43cc8SJohn Rigby 3065fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3066fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3067fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3068fca43cc8SJohn Rigby 3069fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3070fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3071fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3072fca43cc8SJohn Rigby 30736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3074c609719bSwdenk Max number of Flash memory banks 3075c609719bSwdenk 30766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3077c609719bSwdenk Max number of sectors on a Flash chip 3078c609719bSwdenk 30796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3080c609719bSwdenk Timeout for Flash erase operations (in ms) 3081c609719bSwdenk 30826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3083c609719bSwdenk Timeout for Flash write operations (in ms) 3084c609719bSwdenk 30856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 30868564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 30878564acf9Swdenk 30886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 30898564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 30908564acf9Swdenk 30916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 30928564acf9Swdenk If defined, hardware flash sectors protection is used 30938564acf9Swdenk instead of U-Boot software protection. 30948564acf9Swdenk 30956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3096c609719bSwdenk 3097c609719bSwdenk Enable TFTP transfers directly to flash memory; 3098c609719bSwdenk without this option such a download has to be 3099c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3100c609719bSwdenk copy from RAM to flash. 3101c609719bSwdenk 3102c609719bSwdenk The two-step approach is usually more reliable, since 3103c609719bSwdenk you can check if the download worked before you erase 310411ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 310511ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3106c609719bSwdenk downloaded image) this option may be very useful. 3107c609719bSwdenk 31086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3109c609719bSwdenk Define if the flash driver uses extra elements in the 31105653fc33Swdenk common flash structure for storing flash geometry. 31115653fc33Swdenk 311200b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 31135653fc33Swdenk This option also enables the building of the cfi_flash driver 31145653fc33Swdenk in the drivers directory 311553cf9435Sstroese 311691809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 311791809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 311891809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 311991809ed5SPiotr Ziecik to the MTD layer. 312091809ed5SPiotr Ziecik 31216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 312296ef831fSGuennadi Liakhovetski Use buffered writes to flash. 312396ef831fSGuennadi Liakhovetski 312496ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 312596ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 312696ef831fSGuennadi Liakhovetski write commands. 312796ef831fSGuennadi Liakhovetski 31286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 31295568e613SStefan Roese If this option is defined, the common CFI flash doesn't 31305568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 31315568e613SStefan Roese is useful, if some of the configured banks are only 31325568e613SStefan Roese optionally available. 31335568e613SStefan Roese 31349a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 31359a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 31369a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 31379a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 31389a042e9cSJerry Van Baren 3139352ef3f1SStefan Roese- CONFIG_FLASH_VERIFY 3140352ef3f1SStefan Roese If defined, the content of the flash (destination) is compared 3141352ef3f1SStefan Roese against the source after the write operation. An error message 3142352ef3f1SStefan Roese will be printed when the contents are not identical. 3143352ef3f1SStefan Roese Please note that this option is useless in nearly all cases, 3144352ef3f1SStefan Roese since such flash programming errors usually are detected earlier 3145352ef3f1SStefan Roese while unprotecting/erasing/programming. Please only enable 3146352ef3f1SStefan Roese this option if you really know what you are doing. 3147352ef3f1SStefan Roese 31486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 314911ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 315011ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 315153cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 315253cf9435Sstroese buffers can be full shortly after enabling the interface 315311ccc33fSMarcel Ziswiler on high Ethernet traffic. 315453cf9435Sstroese Defaults to 4 if not defined. 3155c609719bSwdenk 3156ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3157ea882bafSWolfgang Denk 3158ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3159ea882bafSWolfgang Denk internally to store the environment settings. The default 3160ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3161ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3162ea882bafSWolfgang Denk lib/hashtable.c for details. 3163ea882bafSWolfgang Denk 31642598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 31652598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 31661bce2aebSRobert P. J. Day Enable validation of the values given to environment variables when 31672598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 31682598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 31692598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 31702598090bSJoe Hershberger 31712598090bSJoe Hershberger The format of the list is: 31722598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3173b445bbb4SJeremiah Mahler access_attribute = [a|r|o|c] 3174b445bbb4SJeremiah Mahler attributes = type_attribute[access_attribute] 31752598090bSJoe Hershberger entry = variable_name[:attributes] 31762598090bSJoe Hershberger list = entry[,list] 31772598090bSJoe Hershberger 31782598090bSJoe Hershberger The type attributes are: 31792598090bSJoe Hershberger s - String (default) 31802598090bSJoe Hershberger d - Decimal 31812598090bSJoe Hershberger x - Hexadecimal 31822598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 31832598090bSJoe Hershberger i - IP address 31842598090bSJoe Hershberger m - MAC address 31852598090bSJoe Hershberger 3186267541f7SJoe Hershberger The access attributes are: 3187267541f7SJoe Hershberger a - Any (default) 3188267541f7SJoe Hershberger r - Read-only 3189267541f7SJoe Hershberger o - Write-once 3190267541f7SJoe Hershberger c - Change-default 3191267541f7SJoe Hershberger 31922598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 31932598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 3194b445bbb4SJeremiah Mahler environment variable in the default or embedded environment. 31952598090bSJoe Hershberger 31962598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 31972598090bSJoe Hershberger Define this to a list (string) to define validation that 31982598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 31992598090bSJoe Hershberger environment variable. To override a setting in the static 32002598090bSJoe Hershberger list, simply add an entry for the same variable name to the 32012598090bSJoe Hershberger ".flags" variable. 32022598090bSJoe Hershberger 3203bdf1fe4eSJoe Hershberger If CONFIG_REGEX is defined, the variable_name above is evaluated as a 3204bdf1fe4eSJoe Hershberger regular expression. This allows multiple variables to define the same 3205bdf1fe4eSJoe Hershberger flags without explicitly listing them for each variable. 3206bdf1fe4eSJoe Hershberger 3207267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3208267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3209267541f7SJoe Hershberger access flags. 3210267541f7SJoe Hershberger 32110d296cc2SGabe Black- CONFIG_USE_STDINT 32120d296cc2SGabe Black If stdint.h is available with your toolchain you can define this 32130d296cc2SGabe Black option to enable it. You can provide option 'USE_STDINT=1' when 32140d296cc2SGabe Black building U-Boot to enable this. 32150d296cc2SGabe Black 3216c609719bSwdenkThe following definitions that deal with the placement and management 3217c609719bSwdenkof environment data (variable area); in general, we support the 3218c609719bSwdenkfollowing configurations: 3219c609719bSwdenk 3220c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3221c3eb3fe4SMike Frysinger 3222c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3223c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3224c3eb3fe4SMike Frysinger 3225c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3226b445bbb4SJeremiah Mahlerin U-Boot initialization (when we try to get the setting of for the 322711ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3228c609719bSwdenkU-Boot will hang. 3229c609719bSwdenk 3230c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3231c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3232c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3233c609719bSwdenkto save the current settings. 3234c609719bSwdenk 32350a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 32360a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3237fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3238fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 32390a85a9e7SLiu Gang 3240b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3241b74ab737SGuennadi Liakhovetski 3242b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3243b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3244b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3245b74ab737SGuennadi Liakhovetski 3246e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3247c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 324800caae6dSSimon Glasscreated; also, when using EEPROM you will have to use env_get_f() 3249c609719bSwdenkuntil then to read environment variables. 3250c609719bSwdenk 325185ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 325285ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 325385ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 325485ec0bccSwdenknecessary, because the first environment variable we need is the 325585ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 325685ec0bccSwdenkhave any device yet where we could complain.] 3257c609719bSwdenk 3258c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3259c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 326085ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3261c609719bSwdenk 32626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3263fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3264fc3e2165Swdenk 32656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3266fc3e2165Swdenk also needs to be defined. 3267fc3e2165Swdenk 32686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3269fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3270c609719bSwdenk 3271f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3272f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3273f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3274f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3275f5675aa5SRon Madrid space for already greatly restricted images, including but not 3276f5675aa5SRon Madrid limited to NAND_SPL configurations. 3277f5675aa5SRon Madrid 3278b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 3279b2b92f53SSimon Glass Display information about the board that U-Boot is running on 3280b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 3281b2b92f53SSimon Glass to do this. 3282b2b92f53SSimon Glass 3283e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 3284e2e3e2b1SSimon Glass Similar to the previous option, but display this information 3285e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 3286e2e3e2b1SSimon Glass present. 3287e2e3e2b1SSimon Glass 3288feb85801SSascha Silbe- CONFIG_BOARD_SIZE_LIMIT: 3289feb85801SSascha Silbe Maximum size of the U-Boot image. When defined, the 3290feb85801SSascha Silbe build system checks that the actual size does not 3291feb85801SSascha Silbe exceed it. 3292feb85801SSascha Silbe 3293c609719bSwdenkLow Level (hardware related) configuration options: 3294dc7c9a1aSwdenk--------------------------------------------------- 3295c609719bSwdenk 32966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3297c609719bSwdenk Cache Line Size of the CPU. 3298c609719bSwdenk 3299e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3300e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3301e46fedfeSTimur Tabi PowerPC SOCs. 3302e46fedfeSTimur Tabi 3303e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3304e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3305e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3306e46fedfeSTimur Tabi 3307e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3308e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3309e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3310e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3311e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3312e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3313e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3314e46fedfeSTimur Tabi 3315e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3316e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3317e46fedfeSTimur Tabi 3318e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3319e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3320e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3321e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3322e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3323e46fedfeSTimur Tabi 3324e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3325e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3326e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3327e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3328e46fedfeSTimur Tabi 3329e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3330e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3331e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3332e46fedfeSTimur Tabi 33337f6c2cbcSwdenk- Floppy Disk Support: 33346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 33357f6c2cbcSwdenk 33367f6c2cbcSwdenk the default drive number (default value 0) 33377f6c2cbcSwdenk 33386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 33397f6c2cbcSwdenk 334011ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 33417f6c2cbcSwdenk (default value 1) 33427f6c2cbcSwdenk 33436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 33447f6c2cbcSwdenk 33457f6c2cbcSwdenk defines the offset of register from address. It 33467f6c2cbcSwdenk depends on which part of the data bus is connected to 334711ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 33487f6c2cbcSwdenk 33496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 33506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 33517f6c2cbcSwdenk default value. 33527f6c2cbcSwdenk 33536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 33547f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 33557f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 3356b445bbb4SJeremiah Mahler source code. It is used to make hardware-dependent 33577f6c2cbcSwdenk initializations. 33587f6c2cbcSwdenk 33590abddf82SMacpaul Lin- CONFIG_IDE_AHB: 33600abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 33610abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 33620abddf82SMacpaul Lin When software is doing ATA command and data transfer to 33630abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 33640abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 3365b445bbb4SJeremiah Mahler is required. 33660abddf82SMacpaul Lin 33676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 336825d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 3369907208c4SChristophe Leroy doing! (11-4) [MPC8xx systems only] 3370c609719bSwdenk 33716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3372c609719bSwdenk 33737152b1d0Swdenk Start address of memory area that can be used for 3374c609719bSwdenk initial data and stack; please note that this must be 3375c609719bSwdenk writable memory that is working WITHOUT special 3376c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3377c609719bSwdenk will become available only after programming the 3378c609719bSwdenk memory controller and running certain initialization 3379c609719bSwdenk sequences. 3380c609719bSwdenk 3381c609719bSwdenk U-Boot uses the following memory types: 3382907208c4SChristophe Leroy - MPC8xx: IMMR (internal memory of the CPU) 3383c609719bSwdenk 33846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3385c609719bSwdenk 3386c609719bSwdenk Offset of the initial data structure in the memory 33876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 33886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3389c609719bSwdenk data is located at the end of the available space 3390553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 3391acd51f9dSSimon Glass GENERATED_GBL_DATA_SIZE), and the initial stack is just 33926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 33936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3394c609719bSwdenk 3395c609719bSwdenk Note: 3396c609719bSwdenk On the MPC824X (or other systems that use the data 3397c609719bSwdenk cache for initial memory) the address chosen for 33986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3399c609719bSwdenk point to an otherwise UNUSED address space between 3400c609719bSwdenk the top of RAM and the start of the PCI space. 3401c609719bSwdenk 34026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3403c609719bSwdenk 34046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3405c609719bSwdenk SDRAM timing 3406c609719bSwdenk 34076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3408c609719bSwdenk periodic timer for refresh 3409c609719bSwdenk 34106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 34116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 34126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 34136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3414c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3415c609719bSwdenk 3416c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 34176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 34186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3419c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3420c609719bSwdenk 342169fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 3422b445bbb4SJeremiah Mahler Only scan through and get the devices on the buses. 342369fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 342469fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 342569fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 342669fd2d3bSAndrew Sharp by coreboot or similar. 342769fd2d3bSAndrew Sharp 3428842033e6SGabor Juhos- CONFIG_PCI_INDIRECT_BRIDGE: 3429842033e6SGabor Juhos Enable support for indirect PCI bridges. 3430842033e6SGabor Juhos 3431a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3432a09b9b68SKumar Gala Chip has SRIO or not 3433a09b9b68SKumar Gala 3434a09b9b68SKumar Gala- CONFIG_SRIO1: 3435a09b9b68SKumar Gala Board has SRIO 1 port available 3436a09b9b68SKumar Gala 3437a09b9b68SKumar Gala- CONFIG_SRIO2: 3438a09b9b68SKumar Gala Board has SRIO 2 port available 3439a09b9b68SKumar Gala 3440c8b28152SLiu Gang- CONFIG_SRIO_PCIE_BOOT_MASTER 3441c8b28152SLiu Gang Board can support master function for Boot from SRIO and PCIE 3442c8b28152SLiu Gang 3443a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3444a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3445a09b9b68SKumar Gala 3446a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3447a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3448a09b9b68SKumar Gala 3449a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3450a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3451a09b9b68SKumar Gala 345266bd1846SFabio Estevam- CONFIG_SYS_NAND_BUSWIDTH_16BIT 345366bd1846SFabio Estevam Defined to tell the NAND controller that the NAND chip is using 345466bd1846SFabio Estevam a 16 bit bus. 345566bd1846SFabio Estevam Not all NAND drivers use this symbol. 3456a430e916SFabio Estevam Example of drivers that use it: 345766bd1846SFabio Estevam - drivers/mtd/nand/ndfc.c 3458a430e916SFabio Estevam - drivers/mtd/nand/mxc_nand.c 3459eced4626SAlex Waterman 3460eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3461eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3462eced4626SAlex Waterman a default value will be used. 3463eced4626SAlex Waterman 3464bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3465218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3466218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3467218ca724SWolfgang Denk 3468bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3469bb99ad6dSBen Warren I2C address of the SPD EEPROM 3470bb99ad6dSBen Warren 34716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3472218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3473218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3474218ca724SWolfgang Denk to something your driver can deal with. 3475bb99ad6dSBen Warren 34761b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 34771b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 34781b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 34791b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 34801b3e3c4fSYork Sun header files or board specific files. 34811b3e3c4fSYork Sun 34826f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 34836f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 34846f5e1dc5SYork Sun 3485e32d59a2SYork Sun- CONFIG_FSL_DDR_SYNC_REFRESH 3486e32d59a2SYork Sun Enable sync of refresh for multiple controllers. 3487e32d59a2SYork Sun 34884516ff81SYork Sun- CONFIG_FSL_DDR_BIST 34894516ff81SYork Sun Enable built-in memory test for Freescale DDR controllers. 34904516ff81SYork Sun 34916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3492218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3493218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 34942ad6b513STimur Tabi 3495c26e454dSwdenk- CONFIG_RMII 3496c26e454dSwdenk Enable RMII mode for all FECs. 3497c26e454dSwdenk Note that this is a global option, we can't 3498c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3499c26e454dSwdenk 35005cf91d6bSwdenk- CONFIG_CRC32_VERIFY 35015cf91d6bSwdenk Add a verify option to the crc32 command. 35025cf91d6bSwdenk The syntax is: 35035cf91d6bSwdenk 35045cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 35055cf91d6bSwdenk 35065cf91d6bSwdenk Where address/count indicate a memory area 35075cf91d6bSwdenk and crc32 is the correct crc32 which the 35085cf91d6bSwdenk area should have. 35095cf91d6bSwdenk 351056523f12Swdenk- CONFIG_LOOPW 351156523f12Swdenk Add the "loopw" memory command. This only takes effect if 3512493f420eSSimon Glass the memory commands are activated globally (CONFIG_CMD_MEMORY). 351356523f12Swdenk 35147b466641Sstroese- CONFIG_MX_CYCLIC 35157b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 35167b466641Sstroese "md/mw" commands. 35177b466641Sstroese Examples: 35187b466641Sstroese 35197b466641Sstroese => mdc.b 10 4 500 35207b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 35217b466641Sstroese 35227b466641Sstroese => mwc.l 100 12345678 10 35237b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 35247b466641Sstroese 35257b466641Sstroese This only takes effect if the memory commands are activated 3526493f420eSSimon Glass globally (CONFIG_CMD_MEMORY). 35277b466641Sstroese 35288aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3529afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3530e03f3169SWolfgang Denk low level initializations (like setting up the memory 3531e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3532e03f3169SWolfgang Denk relocate itself into RAM. 35338aa1a2d1Swdenk 3534e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3535e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3536e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3537e03f3169SWolfgang Denk these initializations itself. 35388aa1a2d1Swdenk 3539b5bd0982SSimon Glass- CONFIG_SKIP_LOWLEVEL_INIT_ONLY 3540b5bd0982SSimon Glass [ARM926EJ-S only] This allows just the call to lowlevel_init() 354190211f77Syeongjun Kim to be skipped. The normal CP15 init (such as enabling the 3542b5bd0982SSimon Glass instruction cache) is still performed. 3543b5bd0982SSimon Glass 3544401bb30bSAneesh V- CONFIG_SPL_BUILD 3545df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3546df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3547df81238bSMagnus Lilja compiling a NAND SPL. 3548400558b5Swdenk 35493aa29de0SYing Zhang- CONFIG_TPL_BUILD 35503aa29de0SYing Zhang Modifies the behaviour of start.S when compiling a loader 35513aa29de0SYing Zhang that is executed after the SPL and before the actual U-Boot. 35523aa29de0SYing Zhang It is loaded by the SPL. 35533aa29de0SYing Zhang 35545df572f0SYing Zhang- CONFIG_SYS_MPC85XX_NO_RESETVEC 35555df572f0SYing Zhang Only for 85xx systems. If this variable is specified, the section 35565df572f0SYing Zhang .resetvec is not kept and the section .bootpg is placed in the 35575df572f0SYing Zhang previous 4k of the .text section. 35585df572f0SYing Zhang 35594213fc29SSimon Glass- CONFIG_ARCH_MAP_SYSMEM 35604213fc29SSimon Glass Generally U-Boot (and in particular the md command) uses 35614213fc29SSimon Glass effective address. It is therefore not necessary to regard 35624213fc29SSimon Glass U-Boot address as virtual addresses that need to be translated 35634213fc29SSimon Glass to physical addresses. However, sandbox requires this, since 35644213fc29SSimon Glass it maintains its own little RAM buffer which contains all 35654213fc29SSimon Glass addressable memory. This option causes some memory accesses 35664213fc29SSimon Glass to be mapped through map_sysmem() / unmap_sysmem(). 35674213fc29SSimon Glass 3568588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 3569588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 3570588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 3571b16f521aSGabe Black 357216678eb4SHeiko Schocher- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: 357316678eb4SHeiko Schocher Enables the RTC32K OSC on AM33xx based plattforms 357416678eb4SHeiko Schocher 3575999d7d32SKaricheri, Muralidharan- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE 3576999d7d32SKaricheri, Muralidharan Option to disable subpage write in NAND driver 3577999d7d32SKaricheri, Muralidharan driver that uses this: 3578999d7d32SKaricheri, Muralidharan drivers/mtd/nand/davinci_nand.c 3579999d7d32SKaricheri, Muralidharan 3580f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3581f2717b47STimur Tabi----------------------------------- 3582f2717b47STimur Tabi 3583f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3584f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3585f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3586f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3587f2717b47STimur Tabiwithin that device. 3588f2717b47STimur Tabi 3589dcf1d774SZhao Qiang- CONFIG_SYS_FMAN_FW_ADDR 3590dcf1d774SZhao Qiang The address in the storage device where the FMAN microcode is located. The 3591dcf1d774SZhao Qiang meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3592dcf1d774SZhao Qiang is also specified. 3593dcf1d774SZhao Qiang 3594dcf1d774SZhao Qiang- CONFIG_SYS_QE_FW_ADDR 3595dcf1d774SZhao Qiang The address in the storage device where the QE microcode is located. The 3596f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3597f2717b47STimur Tabi is also specified. 3598f2717b47STimur Tabi 3599f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3600f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3601f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3602f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3603f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3604f2717b47STimur Tabi 3605f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3606f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3607f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3608f2717b47STimur Tabi virtual address in NOR flash. 3609f2717b47STimur Tabi 3610f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3611f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3612f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3613f2717b47STimur Tabi 3614f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3615f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3616f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3617f2717b47STimur Tabi 3618292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3619292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3620292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3621fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3622fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3623fc54c7faSLiu Gang master's memory space. 3624f2717b47STimur Tabi 3625b940ca64SJ. German RiveraFreescale Layerscape Management Complex Firmware Support: 3626b940ca64SJ. German Rivera--------------------------------------------------------- 3627b940ca64SJ. German RiveraThe Freescale Layerscape Management Complex (MC) supports the loading of 3628b940ca64SJ. German Rivera"firmware". 3629b940ca64SJ. German RiveraThis firmware often needs to be loaded during U-Boot booting, so macros 3630b940ca64SJ. German Riveraare used to identify the storage device (NOR flash, SPI, etc) and the address 3631b940ca64SJ. German Riverawithin that device. 3632b940ca64SJ. German Rivera 3633b940ca64SJ. German Rivera- CONFIG_FSL_MC_ENET 3634b940ca64SJ. German Rivera Enable the MC driver for Layerscape SoCs. 3635b940ca64SJ. German Rivera 36365c055089SPrabhakar KushwahaFreescale Layerscape Debug Server Support: 36375c055089SPrabhakar Kushwaha------------------------------------------- 36385c055089SPrabhakar KushwahaThe Freescale Layerscape Debug Server Support supports the loading of 36395c055089SPrabhakar Kushwaha"Debug Server firmware" and triggering SP boot-rom. 36405c055089SPrabhakar KushwahaThis firmware often needs to be loaded during U-Boot booting. 36415c055089SPrabhakar Kushwaha 3642c0492141SYork Sun- CONFIG_SYS_MC_RSV_MEM_ALIGN 3643c0492141SYork Sun Define alignment of reserved memory MC requires 36445c055089SPrabhakar Kushwaha 3645f3f431a7SPaul KocialkowskiReproducible builds 3646f3f431a7SPaul Kocialkowski------------------- 3647f3f431a7SPaul Kocialkowski 3648f3f431a7SPaul KocialkowskiIn order to achieve reproducible builds, timestamps used in the U-Boot build 3649f3f431a7SPaul Kocialkowskiprocess have to be set to a fixed value. 3650f3f431a7SPaul Kocialkowski 3651f3f431a7SPaul KocialkowskiThis is done using the SOURCE_DATE_EPOCH environment variable. 3652f3f431a7SPaul KocialkowskiSOURCE_DATE_EPOCH is to be set on the build host's shell, not as a configuration 3653f3f431a7SPaul Kocialkowskioption for U-Boot or an environment variable in U-Boot. 3654f3f431a7SPaul Kocialkowski 3655f3f431a7SPaul KocialkowskiSOURCE_DATE_EPOCH should be set to a number of seconds since the epoch, in UTC. 3656f3f431a7SPaul Kocialkowski 3657c609719bSwdenkBuilding the Software: 3658c609719bSwdenk====================== 3659c609719bSwdenk 3660218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3661218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3662218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3663218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3664218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3665218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3666c609719bSwdenk 3667218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3668218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3669218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3670218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3671218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3672c609719bSwdenk 3673218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3674218ca724SWolfgang Denk $ export CROSS_COMPILE 3675c609719bSwdenk 36762f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 36772f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 36782f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 36792f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 36802f8d396bSPeter Tyser 36812f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 36822f8d396bSPeter Tyser 36832f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 36842f8d396bSPeter Tyser be executed on computers running Windows. 36852f8d396bSPeter Tyser 3686c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3687c609719bSwdenksources you must configure U-Boot for one specific board type. This 3688c609719bSwdenkis done by typing: 3689c609719bSwdenk 3690ab584d67SHolger Freyther make NAME_defconfig 3691c609719bSwdenk 3692ab584d67SHolger Freytherwhere "NAME_defconfig" is the name of one of the existing configu- 36934d675ae6SMichael Jonesrations; see boards.cfg for supported names. 369454387ac9Swdenk 3695c609719bSwdenkNote: for some board special configuration names may exist; check if 3696c609719bSwdenk additional information is available from the board vendor; for 36972729af9dSwdenk instance, the TQM823L systems are available without (standard) 36982729af9dSwdenk or with LCD support. You can select such additional "features" 369911ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3700c609719bSwdenk 3701ab584d67SHolger Freyther make TQM823L_defconfig 37022729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3703c609719bSwdenk 3704ab584d67SHolger Freyther make TQM823L_LCD_defconfig 3705c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3706c609719bSwdenk 3707c609719bSwdenk etc. 3708c609719bSwdenk 3709c609719bSwdenk 3710c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 37117152b1d0Swdenkimages ready for download to / installation on your system: 3712c609719bSwdenk 3713c609719bSwdenk- "u-boot.bin" is a raw binary image 3714c609719bSwdenk- "u-boot" is an image in ELF binary format 3715c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3716c609719bSwdenk 3717baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3718baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3719baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3720baf31249SMarian Balakowicz 3721baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3722baf31249SMarian Balakowicz 3723baf31249SMarian Balakowicz make O=/tmp/build distclean 3724ab584d67SHolger Freyther make O=/tmp/build NAME_defconfig 3725baf31249SMarian Balakowicz make O=/tmp/build all 3726baf31249SMarian Balakowicz 3727adbba996STimo Ketola2. Set environment variable KBUILD_OUTPUT to point to the desired location: 3728baf31249SMarian Balakowicz 3729adbba996STimo Ketola export KBUILD_OUTPUT=/tmp/build 3730baf31249SMarian Balakowicz make distclean 3731ab584d67SHolger Freyther make NAME_defconfig 3732baf31249SMarian Balakowicz make all 3733baf31249SMarian Balakowicz 3734adbba996STimo KetolaNote that the command line "O=" setting overrides the KBUILD_OUTPUT environment 3735baf31249SMarian Balakowiczvariable. 3736baf31249SMarian Balakowicz 3737c609719bSwdenk 3738c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3739c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3740c609719bSwdenknative "make". 3741c609719bSwdenk 3742c609719bSwdenk 3743c609719bSwdenkIf the system board that you have is not listed, then you will need 3744c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3745c609719bSwdenksteps: 3746c609719bSwdenk 37473c1496cdSPhil Sutter1. Create a new directory to hold your board specific code. Add any 374885ec0bccSwdenk files you need. In your board directory, you will need at least 37493c1496cdSPhil Sutter the "Makefile" and a "<board>.c". 37503c1496cdSPhil Sutter2. Create a new configuration file "include/configs/<board>.h" for 37513c1496cdSPhil Sutter your board. 3752c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3753c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 3754ab584d67SHolger Freyther4. Run "make <board>_defconfig" with your new name. 3755c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3756c609719bSwdenk to be installed on your target system. 375785ec0bccSwdenk6. Debug and solve any problems that might arise. 3758c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3759c609719bSwdenk 3760c609719bSwdenk 3761c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3762c609719bSwdenk============================================================== 3763c609719bSwdenk 3764c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3765c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3766c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3767c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3768218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3769c609719bSwdenk 3770c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3771c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3772c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 37736de80f21SSimon Glassjust run the buildman script (tools/buildman/buildman), which will 37746de80f21SSimon Glassconfigure and build U-Boot for ALL supported system. Be warned, this 37756de80f21SSimon Glasswill take a while. Please see the buildman README, or run 'buildman -H' 37766de80f21SSimon Glassfor documentation. 3777baf31249SMarian Balakowicz 3778baf31249SMarian Balakowicz 3779c609719bSwdenkSee also "U-Boot Porting Guide" below. 3780c609719bSwdenk 3781c609719bSwdenk 3782c609719bSwdenkMonitor Commands - Overview: 3783c609719bSwdenk============================ 3784c609719bSwdenk 3785c609719bSwdenkgo - start application at address 'addr' 3786c609719bSwdenkrun - run commands in an environment variable 3787c609719bSwdenkbootm - boot application image from memory 3788c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 378944f074c7SMarek Vasutbootz - boot zImage from memory 3790c609719bSwdenktftpboot- boot image via network using TFTP protocol 3791c609719bSwdenk and env variables "ipaddr" and "serverip" 3792c609719bSwdenk (and eventually "gatewayip") 37931fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3794c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3795c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3796c609719bSwdenkloads - load S-Record file over serial line 3797c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3798c609719bSwdenkmd - memory display 3799c609719bSwdenkmm - memory modify (auto-incrementing) 3800c609719bSwdenknm - memory modify (constant address) 3801c609719bSwdenkmw - memory write (fill) 3802c609719bSwdenkcp - memory copy 3803c609719bSwdenkcmp - memory compare 3804c609719bSwdenkcrc32 - checksum calculation 38050f89c54bSPeter Tyseri2c - I2C sub-system 3806c609719bSwdenksspi - SPI utility commands 3807c609719bSwdenkbase - print or set address offset 3808c609719bSwdenkprintenv- print environment variables 3809c609719bSwdenksetenv - set environment variables 3810c609719bSwdenksaveenv - save environment variables to persistent storage 3811c609719bSwdenkprotect - enable or disable FLASH write protection 3812c609719bSwdenkerase - erase FLASH memory 3813c609719bSwdenkflinfo - print FLASH memory information 381410635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 3815c609719bSwdenkbdinfo - print Board Info structure 3816c609719bSwdenkiminfo - print header information for application image 3817c609719bSwdenkconinfo - print console devices and informations 3818c609719bSwdenkide - IDE sub-system 3819c609719bSwdenkloop - infinite loop on address range 382056523f12Swdenkloopw - infinite write loop on address range 3821c609719bSwdenkmtest - simple RAM test 3822c609719bSwdenkicache - enable or disable instruction cache 3823c609719bSwdenkdcache - enable or disable data cache 3824c609719bSwdenkreset - Perform RESET of the CPU 3825c609719bSwdenkecho - echo args to console 3826c609719bSwdenkversion - print monitor version 3827c609719bSwdenkhelp - print online help 3828c609719bSwdenk? - alias for 'help' 3829c609719bSwdenk 3830c609719bSwdenk 3831c609719bSwdenkMonitor Commands - Detailed Description: 3832c609719bSwdenk======================================== 3833c609719bSwdenk 3834c609719bSwdenkTODO. 3835c609719bSwdenk 3836c609719bSwdenkFor now: just type "help <command>". 3837c609719bSwdenk 3838c609719bSwdenk 3839c609719bSwdenkEnvironment Variables: 3840c609719bSwdenk====================== 3841c609719bSwdenk 3842c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3843c609719bSwdenkcan be made persistent by saving to Flash memory. 3844c609719bSwdenk 3845c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3846c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3847c609719bSwdenkwithout a value can be used to delete a variable from the 3848c609719bSwdenkenvironment. As long as you don't save the environment you are 3849c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3850c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3851c609719bSwdenk 3852c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3853c96f86eeSWolfgang Denk 3854c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3855c609719bSwdenk 3856c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3857c609719bSwdenk 3858c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3859c609719bSwdenk 3860c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3861c609719bSwdenk 3862c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3863c609719bSwdenk 3864c609719bSwdenk bootfile - Name of the image to load with TFTP 3865c609719bSwdenk 38667d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 38677d721e34SBartlomiej Sieka command can be restricted. This variable is given as 38687d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 38697d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 38707d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 38717d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3872c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3873c3624e6eSGrant Likely bootm_mapsize. 3874c3624e6eSGrant Likely 3875c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3876c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3877c3624e6eSGrant Likely defines the size of the memory region starting at base 3878c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3879c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3880c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3881c3624e6eSGrant Likely used otherwise. 38827d721e34SBartlomiej Sieka 38837d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 38847d721e34SBartlomiej Sieka command can be restricted. This variable is given as 38857d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 38867d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 38877d721e34SBartlomiej Sieka environment variable. 38887d721e34SBartlomiej Sieka 38894bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 38904bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 38914bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 38924bae9090SBartlomiej Sieka 3893c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3894c609719bSwdenk "bootp" will just load perform a lookup of the 3895c609719bSwdenk configuration from the BOOTP server, but not try to 3896c609719bSwdenk load any image using TFTP 3897c609719bSwdenk 3898c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3899c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3900c609719bSwdenk be automatically started (by internally calling 3901c609719bSwdenk "bootm") 3902c609719bSwdenk 39034a6fd34bSwdenk If set to "no", a standalone image passed to the 39044a6fd34bSwdenk "bootm" command will be copied to the load address 39054a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 39064a6fd34bSwdenk This can be used to load and uncompress arbitrary 39074a6fd34bSwdenk data. 39084a6fd34bSwdenk 3909a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3910a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3911fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3912fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3913fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3914fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3915fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3916fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3917fa34f6b2SShawn Guo access it during the boot procedure. 3918fa34f6b2SShawn Guo 3919a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3920a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3921a28afca5SDavid A. Long to work it must reside in writable memory, have 3922a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3923a28afca5SDavid A. Long add the information it needs into it, and the memory 3924a28afca5SDavid A. Long must be accessible by the kernel. 3925a28afca5SDavid A. Long 3926eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3927eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3928eea63e05SSimon Glass defined. 3929eea63e05SSimon Glass 393017ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 393117ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 393217ea1177Swdenk mode (400kHZ). This environment variable is used in 393317ea1177Swdenk initialization code. So, for changes to be effective 393417ea1177Swdenk it must be saved and board must be reset. 393517ea1177Swdenk 3936c609719bSwdenk initrd_high - restrict positioning of initrd images: 3937c609719bSwdenk If this variable is not set, initrd images will be 3938c609719bSwdenk copied to the highest possible address in RAM; this 3939c609719bSwdenk is usually what you want since it allows for 3940c609719bSwdenk maximum initrd size. If for some reason you want to 3941c609719bSwdenk make sure that the initrd image is loaded below the 39426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3943c609719bSwdenk variable to a value of "no" or "off" or "0". 3944c609719bSwdenk Alternatively, you can set it to a maximum upper 3945c609719bSwdenk address to use (U-Boot will still check that it 3946c609719bSwdenk does not overwrite the U-Boot stack and data). 3947c609719bSwdenk 3948c609719bSwdenk For instance, when you have a system with 16 MB 39497152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3950c609719bSwdenk you can do this by adding "mem=12M" to the value of 3951c609719bSwdenk the "bootargs" variable. However, now you must make 39527152b1d0Swdenk sure that the initrd image is placed in the first 3953c609719bSwdenk 12 MB as well - this can be done with 3954c609719bSwdenk 3955c609719bSwdenk setenv initrd_high 00c00000 3956c609719bSwdenk 395738b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 395838b99261Swdenk indication to U-Boot that all addresses are legal 395938b99261Swdenk for the Linux kernel, including addresses in flash 396038b99261Swdenk memory. In this case U-Boot will NOT COPY the 396138b99261Swdenk ramdisk at all. This may be useful to reduce the 396238b99261Swdenk boot time on your system, but requires that this 396338b99261Swdenk feature is supported by your Linux kernel. 396438b99261Swdenk 3965c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3966c609719bSwdenk 3967c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3968dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3969c609719bSwdenk 3970c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3971c609719bSwdenk 3972c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3973c609719bSwdenk 3974c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3975c609719bSwdenk 3976c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3977c609719bSwdenk 3978c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3979c609719bSwdenk 3980e2a53458SMike Frysinger ethprime - controls which interface is used first. 3981a3d991bdSwdenk 3982e2a53458SMike Frysinger ethact - controls which interface is currently active. 3983e2a53458SMike Frysinger For example you can do the following 3984a3d991bdSwdenk 398548690d80SHeiko Schocher => setenv ethact FEC 398648690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 398748690d80SHeiko Schocher => setenv ethact SCC 398848690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3989a3d991bdSwdenk 3990e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3991e1692577SMatthias Fuchs available network interfaces. 3992e1692577SMatthias Fuchs It just stays at the currently selected interface. 3993e1692577SMatthias Fuchs 3994a3d991bdSwdenk netretry - When set to "no" each network operation will 3995a3d991bdSwdenk either succeed or fail without retrying. 39966e592385Swdenk When set to "once" the network operation will 39976e592385Swdenk fail when all the available network interfaces 39986e592385Swdenk are tried once without success. 3999a3d991bdSwdenk Useful on scripts which control the retry operation 4000a3d991bdSwdenk themselves. 4001a3d991bdSwdenk 4002b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4003a1cf027aSJean-Christophe PLAGNIOL-VILLARD 4004b445bbb4SJeremiah Mahler silent_linux - If set then Linux will be told to boot silently, by 40058d51aacdSSimon Glass changing the console to be empty. If "yes" it will be 40068d51aacdSSimon Glass made silent. If "no" it will not be made silent. If 40078d51aacdSSimon Glass unset, then it will be made silent if the U-Boot console 40088d51aacdSSimon Glass is silent. 40098d51aacdSSimon Glass 4010f5fb7346SAlbert ARIBAUD \(3ADEV\) tftpsrcp - If this is set, the value is used for TFTP's 4011ecb0ccd9SWolfgang Denk UDP source port. 4012ecb0ccd9SWolfgang Denk 4013f5fb7346SAlbert ARIBAUD \(3ADEV\) tftpdstp - If this is set, the value is used for TFTP's UDP 401428cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 401528cb9375SWolfgang Denk 4016c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4017c96f86eeSWolfgang Denk we use the TFTP server's default block size 4018c96f86eeSWolfgang Denk 4019c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4020c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4021c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4022c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4023c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4024c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4025c96f86eeSWolfgang Denk with unreliable TFTP servers. 4026c96f86eeSWolfgang Denk 4027f5fb7346SAlbert ARIBAUD \(3ADEV\) tftptimeoutcountmax - maximum count of TFTP timeouts (no 4028f5fb7346SAlbert ARIBAUD \(3ADEV\) unit, minimum value = 0). Defines how many timeouts 4029f5fb7346SAlbert ARIBAUD \(3ADEV\) can happen during a single file transfer before that 4030f5fb7346SAlbert ARIBAUD \(3ADEV\) transfer is aborted. The default is 10, and 0 means 4031f5fb7346SAlbert ARIBAUD \(3ADEV\) 'no timeouts allowed'. Increasing this value may help 4032f5fb7346SAlbert ARIBAUD \(3ADEV\) downloads succeed with high packet loss rates, or with 4033f5fb7346SAlbert ARIBAUD \(3ADEV\) unreliable TFTP servers or client hardware. 4034f5fb7346SAlbert ARIBAUD \(3ADEV\) 4035a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 403611ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4037a3d991bdSwdenk VLAN tagged frames. 4038c609719bSwdenk 403950768f5bSAlexandre Messier bootpretryperiod - Period during which BOOTP/DHCP sends retries. 404050768f5bSAlexandre Messier Unsigned value, in milliseconds. If not set, the period will 404150768f5bSAlexandre Messier be either the default (28000), or a value based on 404250768f5bSAlexandre Messier CONFIG_NET_RETRY_COUNT, if defined. This value has 404350768f5bSAlexandre Messier precedence over the valu based on CONFIG_NET_RETRY_COUNT. 404450768f5bSAlexandre Messier 4045dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4046dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4047dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4048dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4049dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4050dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4051dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4052dc0b7b0eSJason Hobbs 4053dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4054aed9fed9SFabio Estevamboards currently use other variables for these purposes, and some 4055dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4056dc0b7b0eSJason Hobbs 4057dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4058dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4059dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4060dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4061dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4062dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4063dc0b7b0eSJason Hobbs 4064c609719bSwdenkThe following environment variables may be used and automatically 4065c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4066c609719bSwdenkdepending the information provided by your boot server: 4067c609719bSwdenk 4068c609719bSwdenk bootfile - see above 4069c609719bSwdenk dnsip - IP address of your Domain Name Server 4070fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4071c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4072c609719bSwdenk hostname - Target hostname 4073c609719bSwdenk ipaddr - see above 4074c609719bSwdenk netmask - Subnet Mask 4075c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4076c609719bSwdenk serverip - see above 4077c609719bSwdenk 4078c609719bSwdenk 4079c609719bSwdenkThere are two special Environment Variables: 4080c609719bSwdenk 4081c609719bSwdenk serial# - contains hardware identification information such 4082c609719bSwdenk as type string and/or serial number 4083c609719bSwdenk ethaddr - Ethernet address 4084c609719bSwdenk 4085c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4086c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4087c609719bSwdenkonce they have been set once. 4088c609719bSwdenk 4089c609719bSwdenk 4090c1551ea8SstroeseFurther special Environment Variables: 4091c1551ea8Sstroese 4092c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4093c1551ea8Sstroese with the "version" command. This variable is 4094c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4095c1551ea8Sstroese 4096c1551ea8Sstroese 4097c609719bSwdenkPlease note that changes to some configuration parameters may take 4098c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4099c609719bSwdenk 4100c609719bSwdenk 4101170ab110SJoe HershbergerCallback functions for environment variables: 4102170ab110SJoe Hershberger--------------------------------------------- 4103170ab110SJoe Hershberger 4104170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4105b445bbb4SJeremiah Mahlerwhen their values are changed. This functionality allows functions to 4106170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4107170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4108170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4109170ab110SJoe Hershberger 4110170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4111170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 4112170ab110SJoe Hershberger 4113170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 4114170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 4115170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 4116170ab110SJoe Hershbergerassociations. The list must be in the following format: 4117170ab110SJoe Hershberger 4118170ab110SJoe Hershberger entry = variable_name[:callback_name] 4119170ab110SJoe Hershberger list = entry[,list] 4120170ab110SJoe Hershberger 4121170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 4122170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 4123170ab110SJoe Hershberger 4124170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 4125170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 4126170ab110SJoe Hershbergeroverride any association in the static list. You can define 4127170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 4128b445bbb4SJeremiah Mahler".callbacks" environment variable in the default or embedded environment. 4129170ab110SJoe Hershberger 4130bdf1fe4eSJoe HershbergerIf CONFIG_REGEX is defined, the variable_name above is evaluated as a 4131bdf1fe4eSJoe Hershbergerregular expression. This allows multiple variables to be connected to 4132bdf1fe4eSJoe Hershbergerthe same callback without explicitly listing them all out. 4133bdf1fe4eSJoe Hershberger 4134170ab110SJoe Hershberger 4135f07771ccSwdenkCommand Line Parsing: 4136f07771ccSwdenk===================== 4137f07771ccSwdenk 4138f07771ccSwdenkThere are two different command line parsers available with U-Boot: 41397152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4140f07771ccSwdenk 4141f07771ccSwdenkOld, simple command line parser: 4142f07771ccSwdenk-------------------------------- 4143f07771ccSwdenk 4144f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4145f07771ccSwdenk- several commands on one line, separated by ';' 4146fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4147f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4148f07771ccSwdenk for example: 4149fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4150f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4151f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4152f07771ccSwdenk 4153f07771ccSwdenkHush shell: 4154f07771ccSwdenk----------- 4155f07771ccSwdenk 4156f07771ccSwdenk- similar to Bourne shell, with control structures like 4157f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4158f07771ccSwdenk until...do...done, ... 4159f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4160f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4161f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4162f07771ccSwdenk command 4163f07771ccSwdenk 4164f07771ccSwdenkGeneral rules: 4165f07771ccSwdenk-------------- 4166f07771ccSwdenk 4167f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4168f07771ccSwdenk command) contains several commands separated by semicolon, and 4169f07771ccSwdenk one of these commands fails, then the remaining commands will be 4170f07771ccSwdenk executed anyway. 4171f07771ccSwdenk 4172f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 417311ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4174f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4175f07771ccSwdenk variables are not executed. 4176f07771ccSwdenk 4177c609719bSwdenkNote for Redundant Ethernet Interfaces: 4178c609719bSwdenk======================================= 4179c609719bSwdenk 418011ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4181c609719bSwdenksuch configurations and is capable of automatic selection of a 41827152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4183c609719bSwdenk 4184c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4185c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4186c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4187c609719bSwdenk 4188c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4189c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4190c609719bSwdenkding setting in the environment; if the corresponding environment 4191c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4192c609719bSwdenk 4193c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4194c609719bSwdenk environment, the SROM's address is used. 4195c609719bSwdenk 4196c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4197c609719bSwdenk environment exists, then the value from the environment variable is 4198c609719bSwdenk used. 4199c609719bSwdenk 4200c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4201c609719bSwdenk both addresses are the same, this MAC address is used. 4202c609719bSwdenk 4203c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4204c609719bSwdenk addresses differ, the value from the environment is used and a 4205c609719bSwdenk warning is printed. 4206c609719bSwdenk 4207c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4208bef1014bSJoe Hershberger is raised. If CONFIG_NET_RANDOM_ETHADDR is defined, then in this case 4209bef1014bSJoe Hershberger a random, locally-assigned MAC is used. 4210c609719bSwdenk 4211ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4212ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4213ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4214ecee9324SBen WarrenThe naming convention is as follows: 4215ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4216c609719bSwdenk 4217c609719bSwdenkImage Formats: 4218c609719bSwdenk============== 4219c609719bSwdenk 42203310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 42213310c549SMarian Balakowiczimages in two formats: 42223310c549SMarian Balakowicz 42233310c549SMarian BalakowiczNew uImage format (FIT) 42243310c549SMarian Balakowicz----------------------- 42253310c549SMarian Balakowicz 42263310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 42273310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 42283310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 42293310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 42303310c549SMarian Balakowicz 42313310c549SMarian Balakowicz 42323310c549SMarian BalakowiczOld uImage format 42333310c549SMarian Balakowicz----------------- 42343310c549SMarian Balakowicz 42353310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 42363310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 42373310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4238c609719bSwdenk 4239c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4240c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4241f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4242f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4243f5ed9e39SPeter Tyser INTEGRITY). 4244daab59acSAndy Shevchenko* Target CPU Architecture (Provisions for Alpha, ARM, Intel x86, 4245afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4246daab59acSAndy Shevchenko Currently supported: ARM, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4247c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4248c609719bSwdenk* Load Address 4249c609719bSwdenk* Entry Point 4250c609719bSwdenk* Image Name 4251c609719bSwdenk* Image Timestamp 4252c609719bSwdenk 4253c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4254c609719bSwdenkand the data portions of the image are secured against corruption by 4255c609719bSwdenkCRC32 checksums. 4256c609719bSwdenk 4257c609719bSwdenk 4258c609719bSwdenkLinux Support: 4259c609719bSwdenk============== 4260c609719bSwdenk 4261c609719bSwdenkAlthough U-Boot should support any OS or standalone application 42627152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4263c609719bSwdenkU-Boot. 4264c609719bSwdenk 4265c609719bSwdenkU-Boot includes many features that so far have been part of some 4266c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4267c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4268c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 42697152b1d0Swdenkserves several purposes: 4270c609719bSwdenk 4271c609719bSwdenk- the same features can be used for other OS or standalone 4272c609719bSwdenk applications (for instance: using compressed images to reduce the 4273c609719bSwdenk Flash memory footprint) 4274c609719bSwdenk 4275c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 42767152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4277c609719bSwdenk 4278c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4279c609719bSwdenk images; of course this also means that different kernel images can 4280c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4281c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4282c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4283c609719bSwdenk software is easier now. 4284c609719bSwdenk 4285c609719bSwdenk 4286c609719bSwdenkLinux HOWTO: 4287c609719bSwdenk============ 4288c609719bSwdenk 4289c609719bSwdenkPorting Linux to U-Boot based systems: 4290c609719bSwdenk--------------------------------------- 4291c609719bSwdenk 4292c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4293c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4294c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4295c609719bSwdenkLinux :-). 4296c609719bSwdenk 4297a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4298c609719bSwdenk 4299c609719bSwdenkJust make sure your machine specific header file (for instance 4300c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 43011dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 43021dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 43036d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4304c609719bSwdenk 43052eb31b13SSimon GlassNote that U-Boot now has a driver model, a unified model for drivers. 43062eb31b13SSimon GlassIf you are adding a new driver, plumb it into driver model. If there 43072eb31b13SSimon Glassis no uclass available, you are encouraged to create one. See 43082eb31b13SSimon Glassdoc/driver-model. 43092eb31b13SSimon Glass 4310c609719bSwdenk 4311c609719bSwdenkConfiguring the Linux kernel: 4312c609719bSwdenk----------------------------- 4313c609719bSwdenk 4314c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4315c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4316c609719bSwdenk 4317c609719bSwdenk 4318c609719bSwdenkBuilding a Linux Image: 4319c609719bSwdenk----------------------- 4320c609719bSwdenk 432124ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 432224ee89b9Swdenknot used. If you use recent kernel source, a new build target 432324ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 432424ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 432524ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 432624ee89b9Swdenk100% compatible format. 4327c609719bSwdenk 4328c609719bSwdenkExample: 4329c609719bSwdenk 4330ab584d67SHolger Freyther make TQM850L_defconfig 4331c609719bSwdenk make oldconfig 4332c609719bSwdenk make dep 433324ee89b9Swdenk make uImage 4334c609719bSwdenk 433524ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 433624ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 433724ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4338c609719bSwdenk 433924ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 434024ee89b9Swdenk 434124ee89b9Swdenk* convert the kernel into a raw binary image: 434224ee89b9Swdenk 434324ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 434424ee89b9Swdenk -R .note -R .comment \ 434524ee89b9Swdenk -S vmlinux linux.bin 434624ee89b9Swdenk 434724ee89b9Swdenk* compress the binary image: 434824ee89b9Swdenk 434924ee89b9Swdenk gzip -9 linux.bin 435024ee89b9Swdenk 435124ee89b9Swdenk* package compressed binary image for U-Boot: 435224ee89b9Swdenk 435324ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 435424ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 435524ee89b9Swdenk -d linux.bin.gz uImage 435624ee89b9Swdenk 435724ee89b9Swdenk 435824ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 435924ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 436024ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 436124ee89b9Swdenkbyte header containing information about target architecture, 436224ee89b9Swdenkoperating system, image type, compression method, entry points, time 436324ee89b9Swdenkstamp, CRC32 checksums, etc. 436424ee89b9Swdenk 436524ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 436624ee89b9Swdenkprint the header information, or to build new images. 4367c609719bSwdenk 4368c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4369c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4370c609719bSwdenkchecksum verification: 4371c609719bSwdenk 4372c609719bSwdenk tools/mkimage -l image 4373c609719bSwdenk -l ==> list image header information 4374c609719bSwdenk 4375c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4376c609719bSwdenkfrom a "data file" which is used as image payload: 4377c609719bSwdenk 4378c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4379c609719bSwdenk -n name -d data_file image 4380c609719bSwdenk -A ==> set architecture to 'arch' 4381c609719bSwdenk -O ==> set operating system to 'os' 4382c609719bSwdenk -T ==> set image type to 'type' 4383c609719bSwdenk -C ==> set compression type 'comp' 4384c609719bSwdenk -a ==> set load address to 'addr' (hex) 4385c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4386c609719bSwdenk -n ==> set image name to 'name' 4387c609719bSwdenk -d ==> use image data from 'datafile' 4388c609719bSwdenk 438969459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 439069459791Swdenkaddress (0x00000000), but the entry point address depends on the 439169459791Swdenkkernel version: 4392c609719bSwdenk 4393c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 439424ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4395c609719bSwdenk 4396c609719bSwdenkSo a typical call to build a U-Boot image would read: 4397c609719bSwdenk 439824ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 439924ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4400a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 440124ee89b9Swdenk > examples/uImage.TQM850L 440224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4403c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4404c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4405c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4406c609719bSwdenk Load Address: 0x00000000 440724ee89b9Swdenk Entry Point: 0x00000000 4408c609719bSwdenk 4409c609719bSwdenkTo verify the contents of the image (or check for corruption): 4410c609719bSwdenk 441124ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 441224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4413c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4414c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4415c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4416c609719bSwdenk Load Address: 0x00000000 441724ee89b9Swdenk Entry Point: 0x00000000 4418c609719bSwdenk 4419c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4420c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4421c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4422c609719bSwdenkneed to be uncompressed: 4423c609719bSwdenk 4424a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 442524ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 442624ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4427a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 442824ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 442924ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4430c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4431c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4432c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4433c609719bSwdenk Load Address: 0x00000000 443424ee89b9Swdenk Entry Point: 0x00000000 4435c609719bSwdenk 4436c609719bSwdenk 4437c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4438c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4439c609719bSwdenk 4440c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4441c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4442c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4443c609719bSwdenk Image Name: Simple Ramdisk Image 4444c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4445c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4446c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4447c609719bSwdenk Load Address: 0x00000000 4448c609719bSwdenk Entry Point: 0x00000000 4449c609719bSwdenk 4450a804b5ceSGuilherme Maciel FerreiraThe "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" 4451a804b5ceSGuilherme Maciel Ferreiraoption performs the converse operation of the mkimage's second form (the "-d" 4452a804b5ceSGuilherme Maciel Ferreiraoption). Given an image built by mkimage, the dumpimage extracts a "data file" 4453a804b5ceSGuilherme Maciel Ferreirafrom the image: 4454a804b5ceSGuilherme Maciel Ferreira 4455f41f5b7cSGuilherme Maciel Ferreira tools/dumpimage -i image -T type -p position data_file 4456f41f5b7cSGuilherme Maciel Ferreira -i ==> extract from the 'image' a specific 'data_file' 4457f41f5b7cSGuilherme Maciel Ferreira -T ==> set image type to 'type' 4458f41f5b7cSGuilherme Maciel Ferreira -p ==> 'position' (starting at 0) of the 'data_file' inside the 'image' 4459a804b5ceSGuilherme Maciel Ferreira 4460c609719bSwdenk 4461c609719bSwdenkInstalling a Linux Image: 4462c609719bSwdenk------------------------- 4463c609719bSwdenk 4464c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4465c609719bSwdenkyou must convert the image to S-Record format: 4466c609719bSwdenk 4467c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4468c609719bSwdenk 4469c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4470c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4471c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4472c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4473c609719bSwdenkcommand. 4474c609719bSwdenk 4475c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4476c609719bSwdenkTQM8xxL is in the first Flash bank): 4477c609719bSwdenk 4478c609719bSwdenk => erase 40100000 401FFFFF 4479c609719bSwdenk 4480c609719bSwdenk .......... done 4481c609719bSwdenk Erased 8 sectors 4482c609719bSwdenk 4483c609719bSwdenk => loads 40100000 4484c609719bSwdenk ## Ready for S-Record download ... 4485c609719bSwdenk ~>examples/image.srec 4486c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4487c609719bSwdenk ... 4488c609719bSwdenk 15989 15990 15991 15992 4489c609719bSwdenk [file transfer complete] 4490c609719bSwdenk [connected] 4491c609719bSwdenk ## Start Addr = 0x00000000 4492c609719bSwdenk 4493c609719bSwdenk 4494c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4495c609719bSwdenkthis includes a checksum verification so you can be sure no data 4496c609719bSwdenkcorruption happened: 4497c609719bSwdenk 4498c609719bSwdenk => imi 40100000 4499c609719bSwdenk 4500c609719bSwdenk ## Checking Image at 40100000 ... 4501c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4502c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4503c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4504c609719bSwdenk Load Address: 00000000 4505c609719bSwdenk Entry Point: 0000000c 4506c609719bSwdenk Verifying Checksum ... OK 4507c609719bSwdenk 4508c609719bSwdenk 4509c609719bSwdenkBoot Linux: 4510c609719bSwdenk----------- 4511c609719bSwdenk 4512c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4513c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4514c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4515c609719bSwdenkparameters. You can check and modify this variable using the 4516c609719bSwdenk"printenv" and "setenv" commands: 4517c609719bSwdenk 4518c609719bSwdenk 4519c609719bSwdenk => printenv bootargs 4520c609719bSwdenk bootargs=root=/dev/ram 4521c609719bSwdenk 4522c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4523c609719bSwdenk 4524c609719bSwdenk => printenv bootargs 4525c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4526c609719bSwdenk 4527c609719bSwdenk => bootm 40020000 4528c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4529c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4530c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4531c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4532c609719bSwdenk Load Address: 00000000 4533c609719bSwdenk Entry Point: 0000000c 4534c609719bSwdenk Verifying Checksum ... OK 4535c609719bSwdenk Uncompressing Kernel Image ... OK 4536c609719bSwdenk 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 4537c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4538c609719bSwdenk time_init: decrementer frequency = 187500000/60 4539c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4540c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4541c609719bSwdenk ... 4542c609719bSwdenk 454311ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 45447152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4545c609719bSwdenkformat!) to the "bootm" command: 4546c609719bSwdenk 4547c609719bSwdenk => imi 40100000 40200000 4548c609719bSwdenk 4549c609719bSwdenk ## Checking Image at 40100000 ... 4550c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4551c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4552c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4553c609719bSwdenk Load Address: 00000000 4554c609719bSwdenk Entry Point: 0000000c 4555c609719bSwdenk Verifying Checksum ... OK 4556c609719bSwdenk 4557c609719bSwdenk ## Checking Image at 40200000 ... 4558c609719bSwdenk Image Name: Simple Ramdisk Image 4559c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4560c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4561c609719bSwdenk Load Address: 00000000 4562c609719bSwdenk Entry Point: 00000000 4563c609719bSwdenk Verifying Checksum ... OK 4564c609719bSwdenk 4565c609719bSwdenk => bootm 40100000 40200000 4566c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4567c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4568c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4569c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4570c609719bSwdenk Load Address: 00000000 4571c609719bSwdenk Entry Point: 0000000c 4572c609719bSwdenk Verifying Checksum ... OK 4573c609719bSwdenk Uncompressing Kernel Image ... OK 4574c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4575c609719bSwdenk Image Name: Simple Ramdisk Image 4576c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4577c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4578c609719bSwdenk Load Address: 00000000 4579c609719bSwdenk Entry Point: 00000000 4580c609719bSwdenk Verifying Checksum ... OK 4581c609719bSwdenk Loading Ramdisk ... OK 4582c609719bSwdenk 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 4583c609719bSwdenk Boot arguments: root=/dev/ram 4584c609719bSwdenk time_init: decrementer frequency = 187500000/60 4585c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4586c609719bSwdenk ... 4587c609719bSwdenk RAMDISK: Compressed image found at block 0 4588c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4589c609719bSwdenk 4590c609719bSwdenk bash# 4591c609719bSwdenk 45920267768eSMatthew McClintockBoot Linux and pass a flat device tree: 45930267768eSMatthew McClintock----------- 45940267768eSMatthew McClintock 45950267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 45960267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 45970267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 45980267768eSMatthew McClintockflat device tree: 45990267768eSMatthew McClintock 46000267768eSMatthew McClintock=> print oftaddr 46010267768eSMatthew McClintockoftaddr=0x300000 46020267768eSMatthew McClintock=> print oft 46030267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 46040267768eSMatthew McClintock=> tftp $oftaddr $oft 46050267768eSMatthew McClintockSpeed: 1000, full duplex 46060267768eSMatthew McClintockUsing TSEC0 device 46070267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 46080267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 46090267768eSMatthew McClintockLoad address: 0x300000 46100267768eSMatthew McClintockLoading: # 46110267768eSMatthew McClintockdone 46120267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 46130267768eSMatthew McClintock=> tftp $loadaddr $bootfile 46140267768eSMatthew McClintockSpeed: 1000, full duplex 46150267768eSMatthew McClintockUsing TSEC0 device 46160267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 46170267768eSMatthew McClintockFilename 'uImage'. 46180267768eSMatthew McClintockLoad address: 0x200000 46190267768eSMatthew McClintockLoading:############ 46200267768eSMatthew McClintockdone 46210267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 46220267768eSMatthew McClintock=> print loadaddr 46230267768eSMatthew McClintockloadaddr=200000 46240267768eSMatthew McClintock=> print oftaddr 46250267768eSMatthew McClintockoftaddr=0x300000 46260267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 46270267768eSMatthew McClintock## Booting image at 00200000 ... 46280267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 46290267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 46300267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 46310267768eSMatthew McClintock Load Address: 00000000 46320267768eSMatthew McClintock Entry Point: 00000000 46330267768eSMatthew McClintock Verifying Checksum ... OK 46340267768eSMatthew McClintock Uncompressing Kernel Image ... OK 46350267768eSMatthew McClintockBooting using flat device tree at 0x300000 46360267768eSMatthew McClintockUsing MPC85xx ADS machine description 46370267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 46380267768eSMatthew McClintock[snip] 46390267768eSMatthew McClintock 46400267768eSMatthew McClintock 46416069ff26SwdenkMore About U-Boot Image Types: 46426069ff26Swdenk------------------------------ 46436069ff26Swdenk 46446069ff26SwdenkU-Boot supports the following image types: 46456069ff26Swdenk 46466069ff26Swdenk "Standalone Programs" are directly runnable in the environment 46476069ff26Swdenk provided by U-Boot; it is expected that (if they behave 46486069ff26Swdenk well) you can continue to work in U-Boot after return from 46496069ff26Swdenk the Standalone Program. 46506069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 46516069ff26Swdenk will take over control completely. Usually these programs 46526069ff26Swdenk will install their own set of exception handlers, device 46536069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 46546069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 46556069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 46566069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 46576069ff26Swdenk being started. 46586069ff26Swdenk "Multi-File Images" contain several images, typically an OS 46596069ff26Swdenk (Linux) kernel image and one or more data images like 46606069ff26Swdenk RAMDisks. This construct is useful for instance when you want 46616069ff26Swdenk to boot over the network using BOOTP etc., where the boot 46626069ff26Swdenk server provides just a single image file, but you want to get 46636069ff26Swdenk for instance an OS kernel and a RAMDisk image. 46646069ff26Swdenk 46656069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 46666069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 46676069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 46686069ff26Swdenk Immediately after the terminating 0 follow the images, one by 46696069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 46706069ff26Swdenk a multiple of 4 bytes). 46716069ff26Swdenk 46726069ff26Swdenk "Firmware Images" are binary images containing firmware (like 46736069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 46746069ff26Swdenk flash memory. 46756069ff26Swdenk 46766069ff26Swdenk "Script files" are command sequences that will be executed by 46776069ff26Swdenk U-Boot's command interpreter; this feature is especially 46786069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 46796069ff26Swdenk as command interpreter. 46806069ff26Swdenk 468144f074c7SMarek VasutBooting the Linux zImage: 468244f074c7SMarek Vasut------------------------- 468344f074c7SMarek Vasut 468444f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 468544f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 468644f074c7SMarek Vasutas the syntax of "bootm" command. 468744f074c7SMarek Vasut 46888ac28563STom RiniNote, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply 4689017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4690017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4691017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4692017e1f3fSMarek Vasut 4693c609719bSwdenk 4694c609719bSwdenkStandalone HOWTO: 4695c609719bSwdenk================= 4696c609719bSwdenk 4697c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4698c609719bSwdenkrun "standalone" applications, which can use some resources of 4699c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4700c609719bSwdenk 4701c609719bSwdenkTwo simple examples are included with the sources: 4702c609719bSwdenk 4703c609719bSwdenk"Hello World" Demo: 4704c609719bSwdenk------------------- 4705c609719bSwdenk 4706c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4707c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4708c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4709c609719bSwdenklike that: 4710c609719bSwdenk 4711c609719bSwdenk => loads 4712c609719bSwdenk ## Ready for S-Record download ... 4713c609719bSwdenk ~>examples/hello_world.srec 4714c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4715c609719bSwdenk [file transfer complete] 4716c609719bSwdenk [connected] 4717c609719bSwdenk ## Start Addr = 0x00040004 4718c609719bSwdenk 4719c609719bSwdenk => go 40004 Hello World! This is a test. 4720c609719bSwdenk ## Starting application at 0x00040004 ... 4721c609719bSwdenk Hello World 4722c609719bSwdenk argc = 7 4723c609719bSwdenk argv[0] = "40004" 4724c609719bSwdenk argv[1] = "Hello" 4725c609719bSwdenk argv[2] = "World!" 4726c609719bSwdenk argv[3] = "This" 4727c609719bSwdenk argv[4] = "is" 4728c609719bSwdenk argv[5] = "a" 4729c609719bSwdenk argv[6] = "test." 4730c609719bSwdenk argv[7] = "<NULL>" 4731c609719bSwdenk Hit any key to exit ... 4732c609719bSwdenk 4733c609719bSwdenk ## Application terminated, rc = 0x0 4734c609719bSwdenk 4735c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4736c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4737c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4738c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4739c609719bSwdenkcharacter, but this is just a demo program. The application can be 4740c609719bSwdenkcontrolled by the following keys: 4741c609719bSwdenk 4742c609719bSwdenk ? - print current values og the CPM Timer registers 4743c609719bSwdenk b - enable interrupts and start timer 4744c609719bSwdenk e - stop timer and disable interrupts 4745c609719bSwdenk q - quit application 4746c609719bSwdenk 4747c609719bSwdenk => loads 4748c609719bSwdenk ## Ready for S-Record download ... 4749c609719bSwdenk ~>examples/timer.srec 4750c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4751c609719bSwdenk [file transfer complete] 4752c609719bSwdenk [connected] 4753c609719bSwdenk ## Start Addr = 0x00040004 4754c609719bSwdenk 4755c609719bSwdenk => go 40004 4756c609719bSwdenk ## Starting application at 0x00040004 ... 4757c609719bSwdenk TIMERS=0xfff00980 4758c609719bSwdenk Using timer 1 4759c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4760c609719bSwdenk 4761c609719bSwdenkHit 'b': 4762c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4763c609719bSwdenk Enabling timer 4764c609719bSwdenkHit '?': 4765c609719bSwdenk [q, b, e, ?] ........ 4766c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4767c609719bSwdenkHit '?': 4768c609719bSwdenk [q, b, e, ?] . 4769c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4770c609719bSwdenkHit '?': 4771c609719bSwdenk [q, b, e, ?] . 4772c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4773c609719bSwdenkHit '?': 4774c609719bSwdenk [q, b, e, ?] . 4775c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4776c609719bSwdenkHit 'e': 4777c609719bSwdenk [q, b, e, ?] ...Stopping timer 4778c609719bSwdenkHit 'q': 4779c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4780c609719bSwdenk 4781c609719bSwdenk 478285ec0bccSwdenkMinicom warning: 478385ec0bccSwdenk================ 478485ec0bccSwdenk 47857152b1d0SwdenkOver time, many people have reported problems when trying to use the 478685ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 478785ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4788f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 478985ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4790e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 4791e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 4792e53515a2SKarl O. Pincfor help with kermit. 4793e53515a2SKarl O. Pinc 479485ec0bccSwdenk 479552f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 479652f52c14Swdenkconfiguration to your "File transfer protocols" section: 479752f52c14Swdenk 479852f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 479952f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 480052f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 480152f52c14Swdenk 480252f52c14Swdenk 4803c609719bSwdenkNetBSD Notes: 4804c609719bSwdenk============= 4805c609719bSwdenk 4806c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4807c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4808c609719bSwdenk 4809c609719bSwdenkBuilding requires a cross environment; it is known to work on 4810c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4811c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4812c609719bSwdenkNote that the cross-powerpc package does not install include files; 4813c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4814c609719bSwdenkmissing. This file has to be installed and patched manually: 4815c609719bSwdenk 4816c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4817c609719bSwdenk # mkdir powerpc 4818c609719bSwdenk # ln -s powerpc machine 4819c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4820c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4821c609719bSwdenk 4822c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4823c609719bSwdenkand U-Boot include files. 4824c609719bSwdenk 4825c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4826c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4827c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4828c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 48292a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4830c609719bSwdenk 4831c609719bSwdenk 4832c609719bSwdenkImplementation Internals: 4833c609719bSwdenk========================= 4834c609719bSwdenk 4835c609719bSwdenkThe following is not intended to be a complete description of every 4836c609719bSwdenkimplementation detail. However, it should help to understand the 4837c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4838c609719bSwdenkhardware. 4839c609719bSwdenk 4840c609719bSwdenk 4841c609719bSwdenkInitial Stack, Global Data: 4842c609719bSwdenk--------------------------- 4843c609719bSwdenk 4844c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4845c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4846c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4847c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4848c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4849c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4850c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4851c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4852c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4853c609719bSwdenklocked as (mis-) used as memory, etc. 4854c609719bSwdenk 48557152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 48560668236bSWolfgang Denk U-Boot mailing list: 485743d9616cSwdenk 485843d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 485943d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 486043d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 486143d9616cSwdenk ... 486243d9616cSwdenk 486343d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 486443d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 486543d9616cSwdenk require any physical RAM backing up the cache. The cleverness 486643d9616cSwdenk is that the cache is being used as a temporary supply of 486743d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 486811ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 486943d9616cSwdenk can see how this works by studying the cache architecture and 487043d9616cSwdenk operation in the architecture and processor-specific manuals. 487143d9616cSwdenk 487243d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 487343d9616cSwdenk is another option for the system designer to use as an 487411ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 487543d9616cSwdenk option should work for you. Using CS 4 should be fine if your 487643d9616cSwdenk board designers haven't used it for something that would 487743d9616cSwdenk cause you grief during the initial boot! It is frequently not 487843d9616cSwdenk used. 487943d9616cSwdenk 48806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 488143d9616cSwdenk with your processor/board/system design. The default value 488243d9616cSwdenk you will find in any recent u-boot distribution in 48838a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 488443d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 488543d9616cSwdenk it above 400_0000. Just make sure your board has no resources 488643d9616cSwdenk that are supposed to respond to that address! That code in 488743d9616cSwdenk start.S has been around a while and should work as is when 488843d9616cSwdenk you get the config right. 488943d9616cSwdenk 489043d9616cSwdenk -Chris Hallinan 489143d9616cSwdenk DS4.COM, Inc. 489243d9616cSwdenk 4893c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4894c609719bSwdenkcode for the initialization procedures: 4895c609719bSwdenk 4896c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4897c609719bSwdenk to write it. 4898c609719bSwdenk 4899b445bbb4SJeremiah Mahler* Do not use any uninitialized global data (or implicitly initialized 4900c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 49017152b1d0Swdenk zation is performed later (when relocating to RAM). 4902c609719bSwdenk 4903c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4904c609719bSwdenk that. 4905c609719bSwdenk 4906c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4907b445bbb4SJeremiah Mahlernormal global data to share information between the code. But it 4908c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4909c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4910c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4911c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4912c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4913c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4914c609719bSwdenkreserve for this purpose. 4915c609719bSwdenk 49167152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4917c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4918c609719bSwdenkGCC's implementation. 4919c609719bSwdenk 4920c609719bSwdenkFor PowerPC, the following registers have specific use: 4921c609719bSwdenk R1: stack pointer 4922e7670f6cSWolfgang Denk R2: reserved for system use 4923c609719bSwdenk R3-R4: parameter passing and return values 4924c609719bSwdenk R5-R10: parameter passing 4925c609719bSwdenk R13: small data area pointer 4926c609719bSwdenk R30: GOT pointer 4927c609719bSwdenk R31: frame pointer 4928c609719bSwdenk 4929e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4930e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4931e6bee808SJoakim Tjernlund going back and forth between asm and C) 4932c609719bSwdenk 4933e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4934c609719bSwdenk 4935c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4936c609719bSwdenk address of the global data structure is known at compile time), 4937c609719bSwdenk but it turned out that reserving a register results in somewhat 4938c609719bSwdenk smaller code - although the code savings are not that big (on 4939c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4940c609719bSwdenk 624 text + 127 data). 4941c609719bSwdenk 4942c609719bSwdenkOn ARM, the following registers are used: 4943c609719bSwdenk 4944c609719bSwdenk R0: function argument word/integer result 4945c609719bSwdenk R1-R3: function argument word 494612eba1b4SJeroen Hofstee R9: platform specific 494712eba1b4SJeroen Hofstee R10: stack limit (used only if stack checking is enabled) 4948c609719bSwdenk R11: argument (frame) pointer 4949c609719bSwdenk R12: temporary workspace 4950c609719bSwdenk R13: stack pointer 4951c609719bSwdenk R14: link register 4952c609719bSwdenk R15: program counter 4953c609719bSwdenk 495412eba1b4SJeroen Hofstee ==> U-Boot will use R9 to hold a pointer to the global data 495512eba1b4SJeroen Hofstee 495612eba1b4SJeroen Hofstee Note: on ARM, only R_ARM_RELATIVE relocations are supported. 4957c609719bSwdenk 49580df01fd3SThomas ChouOn Nios II, the ABI is documented here: 49590df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 49600df01fd3SThomas Chou 49610df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 49620df01fd3SThomas Chou 49630df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 49640df01fd3SThomas Chou to access small data sections, so gp is free. 49650df01fd3SThomas Chou 4966afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4967afc1ce82SMacpaul Lin 4968afc1ce82SMacpaul Lin R0-R1: argument/return 4969afc1ce82SMacpaul Lin R2-R5: argument 4970afc1ce82SMacpaul Lin R15: temporary register for assembler 4971afc1ce82SMacpaul Lin R16: trampoline register 4972afc1ce82SMacpaul Lin R28: frame pointer (FP) 4973afc1ce82SMacpaul Lin R29: global pointer (GP) 4974afc1ce82SMacpaul Lin R30: link register (LP) 4975afc1ce82SMacpaul Lin R31: stack pointer (SP) 4976afc1ce82SMacpaul Lin PC: program counter (PC) 4977afc1ce82SMacpaul Lin 4978afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4979afc1ce82SMacpaul Lin 4980d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4981d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4982c609719bSwdenk 4983c609719bSwdenkMemory Management: 4984c609719bSwdenk------------------ 4985c609719bSwdenk 4986c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4987c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4988c609719bSwdenk 4989c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4990c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4991c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4992c609719bSwdenkphysical memory banks. 4993c609719bSwdenk 4994c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4995c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4996c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4997c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 49986d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4999c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5000c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5001c609719bSwdenk 5002c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5003c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5004c609719bSwdenk 5005c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5006c609719bSwdenkthis: 5007c609719bSwdenk 5008c609719bSwdenk 0x0000 0000 Exception Vector code 5009c609719bSwdenk : 5010c609719bSwdenk 0x0000 1FFF 5011c609719bSwdenk 0x0000 2000 Free for Application Use 5012c609719bSwdenk : 5013c609719bSwdenk : 5014c609719bSwdenk 5015c609719bSwdenk : 5016c609719bSwdenk : 5017c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5018c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5019c609719bSwdenk 0x00FC 0000 Malloc Arena 5020c609719bSwdenk : 5021c609719bSwdenk 0x00FD FFFF 5022c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5023c609719bSwdenk ... eventually: LCD or video framebuffer 5024c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5025c609719bSwdenk 0x00FF FFFF [End of RAM] 5026c609719bSwdenk 5027c609719bSwdenk 5028c609719bSwdenkSystem Initialization: 5029c609719bSwdenk---------------------- 5030c609719bSwdenk 5031c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 503211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5033c609719bSwdenkconfiguration for CS0# this is a mirror of the on board Flash memory. 50347152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5035c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5036c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 50372eb48ff7SHeiko Schocherwhich provide such a feature like), or in a locked part of the data 50382eb48ff7SHeiko Schochercache. After that, U-Boot initializes the CPU core, the caches and 50392eb48ff7SHeiko Schocherthe SIU. 5040c609719bSwdenk 5041c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5042c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5043c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5044c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5045c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5046c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5047c609719bSwdenkbanks. 5048c609719bSwdenk 5049c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 50507152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5051c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5052c609719bSwdenk0x00000000, with any additional banks following immediately to create 5053c609719bSwdenkcontiguous memory starting from 0. 5054c609719bSwdenk 5055c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5056c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5057c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5058c609719bSwdenkpages, and the final stack is set up. 5059c609719bSwdenk 5060c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5061c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5062c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5063c609719bSwdenknew address in RAM. 5064c609719bSwdenk 5065c609719bSwdenk 5066c609719bSwdenkU-Boot Porting Guide: 5067c609719bSwdenk---------------------- 5068c609719bSwdenk 5069c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 50706aff3115Swdenklist, October 2002] 5071c609719bSwdenk 5072c609719bSwdenk 5073c609719bSwdenkint main(int argc, char *argv[]) 5074c609719bSwdenk{ 5075c609719bSwdenk sighandler_t no_more_time; 5076c609719bSwdenk 5077c609719bSwdenk signal(SIGALRM, no_more_time); 5078c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5079c609719bSwdenk 5080c609719bSwdenk if (available_money > available_manpower) { 50816c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5082c609719bSwdenk return 0; 5083c609719bSwdenk } 5084c609719bSwdenk 5085c609719bSwdenk Download latest U-Boot source; 5086c609719bSwdenk 50870668236bSWolfgang Denk Subscribe to u-boot mailing list; 50886aff3115Swdenk 50896c3fef28SJerry Van Baren if (clueless) 5090c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5091c609719bSwdenk 5092c609719bSwdenk while (learning) { 5093c609719bSwdenk Read the README file in the top level directory; 50947cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 50956c3fef28SJerry Van Baren Read applicable doc/*.README; 5096c609719bSwdenk Read the source, Luke; 50976c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5098c609719bSwdenk } 5099c609719bSwdenk 51006c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 51016c3fef28SJerry Van Baren Buy a BDI3000; 51026c3fef28SJerry Van Baren else 5103c609719bSwdenk Add a lot of aggravation and time; 5104c609719bSwdenk 51056c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 51066c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 51076c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 51086c3fef28SJerry Van Baren } else { 5109c609719bSwdenk Create your own board support subdirectory; 51106c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 51116c3fef28SJerry Van Baren } 51126c3fef28SJerry Van Baren Edit new board/<myboard> files 51136c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5114c609719bSwdenk 51156c3fef28SJerry Van Baren while (!accepted) { 5116c609719bSwdenk while (!running) { 5117c609719bSwdenk do { 5118c609719bSwdenk Add / modify source code; 5119c609719bSwdenk } until (compiles); 5120c609719bSwdenk Debug; 5121c609719bSwdenk if (clueless) 5122c609719bSwdenk email("Hi, I am having problems..."); 5123c609719bSwdenk } 51246c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 51256c3fef28SJerry Van Baren if (reasonable critiques) 51266c3fef28SJerry Van Baren Incorporate improvements from email list code review; 51276c3fef28SJerry Van Baren else 51286c3fef28SJerry Van Baren Defend code as written; 51296c3fef28SJerry Van Baren } 5130c609719bSwdenk 5131c609719bSwdenk return 0; 5132c609719bSwdenk} 5133c609719bSwdenk 5134c609719bSwdenkvoid no_more_time (int sig) 5135c609719bSwdenk{ 5136c609719bSwdenk hire_a_guru(); 5137c609719bSwdenk} 5138c609719bSwdenk 5139c609719bSwdenk 5140c609719bSwdenkCoding Standards: 5141c609719bSwdenk----------------- 5142c609719bSwdenk 5143c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 51442c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 51457ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5146c609719bSwdenk 51472c051651SDetlev ZundelSource files originating from a different project (for example the 51482c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 5149b445bbb4SJeremiah Mahlerreformatted to ease subsequent migration to newer versions of those 51502c051651SDetlev Zundelsources. 51512c051651SDetlev Zundel 51522c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 51532c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 51542c051651SDetlev Zundelin your code. 5155c609719bSwdenk 5156c178d3daSwdenkPlease also stick to the following formatting rules: 5157180d3f74Swdenk- remove any trailing white space 51587ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5159180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 51607ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5161180d3f74Swdenk- do not add trailing empty lines to source files 5162180d3f74Swdenk 5163c609719bSwdenkSubmissions which do not conform to the standards may be returned 5164c609719bSwdenkwith a request to reformat the changes. 5165c609719bSwdenk 5166c609719bSwdenk 5167c609719bSwdenkSubmitting Patches: 5168c609719bSwdenk------------------- 5169c609719bSwdenk 5170c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5171c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5172c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5173c609719bSwdenk 51740d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5175218ca724SWolfgang Denk 51760668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 51770668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 51780668236bSWolfgang Denk 5179c609719bSwdenkWhen you send a patch, please include the following information with 5180c609719bSwdenkit: 5181c609719bSwdenk 5182c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5183c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5184c609719bSwdenk patch actually fixes something. 5185c609719bSwdenk 5186c609719bSwdenk* For new features: a description of the feature and your 5187c609719bSwdenk implementation. 5188c609719bSwdenk 5189c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5190c609719bSwdenk 51917207b366SRobert P. J. Day* For major contributions, add a MAINTAINERS file with your 51927207b366SRobert P. J. Day information and associated file and directory references. 5193c609719bSwdenk 519427af930eSAlbert ARIBAUD* When you add support for a new board, don't forget to add a 519527af930eSAlbert ARIBAUD maintainer e-mail address to the boards.cfg file, too. 5196c609719bSwdenk 5197c609719bSwdenk* If your patch adds new configuration options, don't forget to 5198c609719bSwdenk document these in the README file. 5199c609719bSwdenk 5200218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5201218ca724SWolfgang Denk recommended) you can easily generate the patch using the 52027ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5203218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5204218ca724SWolfgang Denk with some other mail clients. 5205c609719bSwdenk 5206218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5207218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5208218ca724SWolfgang Denk GNU diff. 52096dff5529Swdenk 5210218ca724SWolfgang Denk The current directory when running this command shall be the parent 5211218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5212218ca724SWolfgang Denk your patch includes sufficient directory information for the 5213218ca724SWolfgang Denk affected files). 5214218ca724SWolfgang Denk 5215218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5216218ca724SWolfgang Denk and compressed attachments must not be used. 5217c609719bSwdenk 521852f52c14Swdenk* If one logical set of modifications affects or creates several 521952f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 522052f52c14Swdenk 522152f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 522252f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 522352f52c14Swdenk 522452f52c14Swdenk 5225c609719bSwdenkNotes: 5226c609719bSwdenk 52276de80f21SSimon Glass* Before sending the patch, run the buildman script on your patched 5228c609719bSwdenk source tree and make sure that no errors or warnings are reported 5229c609719bSwdenk for any of the boards. 5230c609719bSwdenk 5231c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5232c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5233c609719bSwdenk returned with a request to re-formatting / split it. 5234c609719bSwdenk 5235c609719bSwdenk* If you modify existing code, make sure that your new code does not 5236c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5237c609719bSwdenk When adding new features, these should compile conditionally only 5238c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5239c609719bSwdenk disabled must not need more memory than the old code without your 5240c609719bSwdenk modification. 524190dc6704Swdenk 52420668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 52430668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 52440668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 52450668236bSWolfgang Denk bigger than the size limit should be avoided. 5246