1c609719bSwdenk# 2b75190deSWolfgang Denk# (C) Copyright 2000 - 2012 3c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4c609719bSwdenk# 5c609719bSwdenk# See file CREDITS for list of people who contributed to this 6c609719bSwdenk# project. 7c609719bSwdenk# 8c609719bSwdenk# This program is free software; you can redistribute it and/or 9c609719bSwdenk# modify it under the terms of the GNU General Public License as 10c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11c609719bSwdenk# the License, or (at your option) any later version. 12c609719bSwdenk# 13c609719bSwdenk# This program is distributed in the hope that it will be useful, 14c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16c609719bSwdenk# GNU General Public License for more details. 17c609719bSwdenk# 18c609719bSwdenk# You should have received a copy of the GNU General Public License 19c609719bSwdenk# along with this program; if not, write to the Free Software 20c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21c609719bSwdenk# MA 02111-1307 USA 22c609719bSwdenk# 23c609719bSwdenk 24c609719bSwdenkSummary: 25c609719bSwdenk======== 26c609719bSwdenk 2724ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30e86e5a07Swdenkinitialize and test the hardware or to download and run application 31e86e5a07Swdenkcode. 32c609719bSwdenk 33c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 3424ee89b9Swdenkthe source code originate in the Linux source tree, we have some 3524ee89b9Swdenkheader files in common, and special provision has been made to 36c609719bSwdenksupport booting of Linux images. 37c609719bSwdenk 38c609719bSwdenkSome attention has been paid to make this software easily 39c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43c609719bSwdenkload and run it dynamically. 44c609719bSwdenk 45c609719bSwdenk 46c609719bSwdenkStatus: 47c609719bSwdenk======= 48c609719bSwdenk 49c609719bSwdenkIn general, all boards for which a configuration option exists in the 50c609719bSwdenkMakefile have been tested to some extent and can be considered 51c609719bSwdenk"working". In fact, many of them are used in production systems. 52c609719bSwdenk 53c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55218ca724SWolfgang Denkmaintainers. 56c609719bSwdenk 57c609719bSwdenk 58c609719bSwdenkWhere to get help: 59c609719bSwdenk================== 60c609719bSwdenk 61c609719bSwdenkIn case you have questions about, problems with or contributions for 62c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 630c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 640c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 650c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 660c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 67c609719bSwdenk 68c609719bSwdenk 69218ca724SWolfgang DenkWhere to get source code: 70218ca724SWolfgang Denk========================= 71218ca724SWolfgang Denk 72218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75218ca724SWolfgang Denk 76218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 7711ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 78218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79218ca724SWolfgang Denkdirectory. 80218ca724SWolfgang Denk 81d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83218ca724SWolfgang Denk 84218ca724SWolfgang Denk 85c609719bSwdenkWhere we come from: 86c609719bSwdenk=================== 87c609719bSwdenk 88c609719bSwdenk- start from 8xxrom sources 8924ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90c609719bSwdenk- clean up code 91c609719bSwdenk- make it easier to add custom boards 92c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93c609719bSwdenk- extend functions, especially: 94c609719bSwdenk * Provide extended interface to Linux boot loader 95c609719bSwdenk * S-Record download 96c609719bSwdenk * network boot 9711ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 9824ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99c609719bSwdenk- add other CPU families (starting with ARM) 10024ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 1010d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 10224ee89b9Swdenk 10324ee89b9Swdenk 10424ee89b9SwdenkNames and Spelling: 10524ee89b9Swdenk=================== 10624ee89b9Swdenk 10724ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 10824ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 10924ee89b9Swdenkin source files etc.). Example: 11024ee89b9Swdenk 11124ee89b9Swdenk This is the README file for the U-Boot project. 11224ee89b9Swdenk 11324ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 11424ee89b9Swdenk 11524ee89b9Swdenk include/asm-ppc/u-boot.h 11624ee89b9Swdenk 11724ee89b9Swdenk #include <asm/u-boot.h> 11824ee89b9Swdenk 11924ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 12024ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 12124ee89b9Swdenk 12224ee89b9Swdenk U_BOOT_VERSION u_boot_logo 12324ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124c609719bSwdenk 125c609719bSwdenk 12693f19cc0SwdenkVersioning: 12793f19cc0Swdenk=========== 12893f19cc0Swdenk 129360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 130360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 131360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 132360d883aSThomas Webernames consisting of the calendar year and month of the release date. 133360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 134360d883aSThomas Weberreleases in "stable" maintenance trees. 13593f19cc0Swdenk 136360d883aSThomas WeberExamples: 137360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 138360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 139360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 14093f19cc0Swdenk 14193f19cc0Swdenk 142c609719bSwdenkDirectory Hierarchy: 143c609719bSwdenk==================== 144c609719bSwdenk 1458d321b81SPeter Tyser/arch Architecture specific files 1468d321b81SPeter Tyser /arm Files generic to ARM architecture 1478d321b81SPeter Tyser /cpu CPU specific files 1488d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1498d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1506eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1518d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1528d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1538d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 1548d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1558d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1568d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 1578d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1588d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 1598d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1608d321b81SPeter Tyser /lib Architecture specific library files 1618d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1628d321b81SPeter Tyser /cpu CPU specific files 1638d321b81SPeter Tyser /lib Architecture specific library files 1648d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1658d321b81SPeter Tyser /cpu CPU specific files 1668d321b81SPeter Tyser /lib Architecture specific library files 167fea25720SGraeme Russ /x86 Files generic to x86 architecture 1688d321b81SPeter Tyser /cpu CPU specific files 1698d321b81SPeter Tyser /lib Architecture specific library files 1708d321b81SPeter Tyser /m68k Files generic to m68k architecture 1718d321b81SPeter Tyser /cpu CPU specific files 1728d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1738d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1748d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1758d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1768d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1778d321b81SPeter Tyser /lib Architecture specific library files 1788d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1798d321b81SPeter Tyser /cpu CPU specific files 1808d321b81SPeter Tyser /lib Architecture specific library files 1818d321b81SPeter Tyser /mips Files generic to MIPS architecture 1828d321b81SPeter Tyser /cpu CPU specific files 18392bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 18480421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 1858d321b81SPeter Tyser /lib Architecture specific library files 186afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 187afc1ce82SMacpaul Lin /cpu CPU specific files 188afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 189afc1ce82SMacpaul Lin /lib Architecture specific library files 1908d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1918d321b81SPeter Tyser /cpu CPU specific files 1928d321b81SPeter Tyser /lib Architecture specific library files 193a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1948d321b81SPeter Tyser /cpu CPU specific files 1958d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1968d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1978d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1988d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1998d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 2008d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 2018d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 2028d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 2038d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 2048d321b81SPeter Tyser /lib Architecture specific library files 2058d321b81SPeter Tyser /sh Files generic to SH architecture 2068d321b81SPeter Tyser /cpu CPU specific files 2078d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 2088d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 2098d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 2108d321b81SPeter Tyser /lib Architecture specific library files 2118d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2128d321b81SPeter Tyser /cpu CPU specific files 2138d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2148d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2158d321b81SPeter Tyser /lib Architecture specific library files 2168d321b81SPeter Tyser/api Machine/arch independent API for external apps 2178d321b81SPeter Tyser/board Board dependent files 2188d321b81SPeter Tyser/common Misc architecture independent functions 2198d321b81SPeter Tyser/disk Code for disk drive partition handling 2208d321b81SPeter Tyser/doc Documentation (don't expect too much) 2218d321b81SPeter Tyser/drivers Commonly used device drivers 2228d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2238d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2248d321b81SPeter Tyser/include Header Files 2258d321b81SPeter Tyser/lib Files generic to all architectures 2268d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2278d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2288d321b81SPeter Tyser /lzo Library files to support LZO decompression 2298d321b81SPeter Tyser/net Networking code 2308d321b81SPeter Tyser/post Power On Self Test 2318d321b81SPeter Tyser/rtc Real Time Clock drivers 2328d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 233c609719bSwdenk 234c609719bSwdenkSoftware Configuration: 235c609719bSwdenk======================= 236c609719bSwdenk 237c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 238c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 239c609719bSwdenk 240c609719bSwdenkThere are two classes of configuration variables: 241c609719bSwdenk 242c609719bSwdenk* Configuration _OPTIONS_: 243c609719bSwdenk These are selectable by the user and have names beginning with 244c609719bSwdenk "CONFIG_". 245c609719bSwdenk 246c609719bSwdenk* Configuration _SETTINGS_: 247c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 248c609719bSwdenk you don't know what you're doing; they have names beginning with 2496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 250c609719bSwdenk 251c609719bSwdenkLater we will add a configuration tool - probably similar to or even 252c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 253c609719bSwdenkdo the configuration by hand, which means creating some symbolic 254c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 255c609719bSwdenkas an example here. 256c609719bSwdenk 257c609719bSwdenk 258c609719bSwdenkSelection of Processor Architecture and Board Type: 259c609719bSwdenk--------------------------------------------------- 260c609719bSwdenk 261c609719bSwdenkFor all supported boards there are ready-to-use default 262c609719bSwdenkconfigurations available; just type "make <board_name>_config". 263c609719bSwdenk 264c609719bSwdenkExample: For a TQM823L module type: 265c609719bSwdenk 266c609719bSwdenk cd u-boot 267c609719bSwdenk make TQM823L_config 268c609719bSwdenk 26911ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 270c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 271c609719bSwdenkdirectory according to the instructions in cogent/README. 272c609719bSwdenk 273c609719bSwdenk 274c609719bSwdenkConfiguration Options: 275c609719bSwdenk---------------------- 276c609719bSwdenk 277c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 278c609719bSwdenksuch information is kept in a configuration file 279c609719bSwdenk"include/configs/<board_name>.h". 280c609719bSwdenk 281c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 282c609719bSwdenk"include/configs/TQM823L.h". 283c609719bSwdenk 284c609719bSwdenk 2857f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2867f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2877f6c2cbcSwdenkbuild a config tool - later. 2887f6c2cbcSwdenk 2897f6c2cbcSwdenk 290c609719bSwdenkThe following options need to be configured: 291c609719bSwdenk 2922628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 293c609719bSwdenk 2942628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2956ccec449SWolfgang Denk 2966ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 29709ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 298c609719bSwdenk 299c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 300c609719bSwdenk Define exactly one of 301c609719bSwdenk CONFIG_CMA286_60_OLD 302c609719bSwdenk--- FIXME --- not tested yet: 303c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 304c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 305c609719bSwdenk 306c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 307c609719bSwdenk Define exactly one of 308c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 309c609719bSwdenk 310c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 311c609719bSwdenk Define one or more of 312c609719bSwdenk CONFIG_CMA302 313c609719bSwdenk 314c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 315c609719bSwdenk Define one or more of 316c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 31711ccc33fSMarcel Ziswiler the LCD display every second with 318c609719bSwdenk a "rotator" |\-/|\-/ 319c609719bSwdenk 3202535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3212535d602Swdenk CONFIG_ADSTYPE 3222535d602Swdenk Possible values are: 3236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3272535d602Swdenk 328cf946c6dSLei Wen- Marvell Family Member 329cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 330cf946c6dSLei Wen multiple fs option at one time 331cf946c6dSLei Wen for marvell soc family 332cf946c6dSLei Wen 333c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 334c609719bSwdenk Define exactly one of 335c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 336c609719bSwdenk 33711ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 33866ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 33966ca92a5Swdenk get_gclk_freq() cannot work 3405da627a4Swdenk e.g. if there is no 32KHz 3415da627a4Swdenk reference PIT/RTC clock 34266ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 34366ca92a5Swdenk or XTAL/EXTAL) 344c609719bSwdenk 34566ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 34866ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 34975d1ea7fSwdenk See doc/README.MPC866 35075d1ea7fSwdenk 3516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 35275d1ea7fSwdenk 35375d1ea7fSwdenk Define this to measure the actual CPU clock instead 35475d1ea7fSwdenk of relying on the correctness of the configured 35575d1ea7fSwdenk values. Mostly useful for board bringup to make sure 35675d1ea7fSwdenk the PLL is locked at the intended frequency. Note 35775d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 35975d1ea7fSwdenk 360506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 361506f3918SHeiko Schocher 362506f3918SHeiko Schocher Define this option if you want to enable the 363506f3918SHeiko Schocher ICache only when Code runs from RAM. 364506f3918SHeiko Schocher 36566412c63SKumar Gala- 85xx CPU Options: 36666412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36766412c63SKumar Gala 36866412c63SKumar Gala Defines the core time base clock divider ratio compared to the 36966412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 37066412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37166412c63SKumar Gala 3728f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3738f29084aSKumar Gala 3748f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3758f29084aSKumar Gala tree nodes for the given platform. 3768f29084aSKumar Gala 377afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 378afa6b551SPrabhakar Kushwaha 379afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 380afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 381afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 382afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 383afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 384afa6b551SPrabhakar Kushwaha purpose. 385afa6b551SPrabhakar Kushwaha 38633eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 38733eee330SScott Wood 38833eee330SScott Wood Enables a workaround for erratum A004510. If set, 38933eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 39033eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 39133eee330SScott Wood 39233eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 39333eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 39433eee330SScott Wood 39533eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 39633eee330SScott Wood for which the A004510 workaround should be applied. 39733eee330SScott Wood 39833eee330SScott Wood The rest of SVR is either not relevant to the decision 39933eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 40033eee330SScott Wood p2041) or is implied by the build target, which controls 40133eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 40233eee330SScott Wood 40333eee330SScott Wood See Freescale App Note 4493 for more information about 40433eee330SScott Wood this erratum. 40533eee330SScott Wood 40633eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 40733eee330SScott Wood 40833eee330SScott Wood This is the value to write into CCSR offset 0x18600 40933eee330SScott Wood according to the A004510 workaround. 41033eee330SScott Wood 4116cb461b4SDaniel Schwierzeck- Generic CPU options: 4126cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4136cb461b4SDaniel Schwierzeck 4146cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4156cb461b4SDaniel Schwierzeck values is arch specific. 4166cb461b4SDaniel Schwierzeck 4170b953ffcSMarkus Klotzbuecher- Intel Monahans options: 4186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 4190b953ffcSMarkus Klotzbuecher 4200b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 4210b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 4220b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 4230b953ffcSMarkus Klotzbuecher 4246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 4250b953ffcSMarkus Klotzbuecher 4260b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 4270b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 4280b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 4290b953ffcSMarkus Klotzbuecher by this value. 4300b953ffcSMarkus Klotzbuecher 43192bbd64eSDaniel Schwierzeck- MIPS CPU options: 43292bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 43392bbd64eSDaniel Schwierzeck 43492bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 43592bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 43692bbd64eSDaniel Schwierzeck relocation. 43792bbd64eSDaniel Schwierzeck 43892bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 43992bbd64eSDaniel Schwierzeck 44092bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 44192bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 44292bbd64eSDaniel Schwierzeck Possible values are: 44392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 44492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 44592bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 44692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 44792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 44892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 44992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 45092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 45192bbd64eSDaniel Schwierzeck 45292bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 45392bbd64eSDaniel Schwierzeck 45492bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 45592bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 45692bbd64eSDaniel Schwierzeck 45792bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 45892bbd64eSDaniel Schwierzeck 45992bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 46092bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 46192bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 46292bbd64eSDaniel Schwierzeck 463b67d8816SChristian Riesch- ARM options: 464b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 465b67d8816SChristian Riesch 466b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 467b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 468b67d8816SChristian Riesch 4695356f545SAneesh V CONFIG_SYS_THUMB_BUILD 4705356f545SAneesh V 4715356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 4725356f545SAneesh V set for ARM architectures. Thumb instruction set provides 4735356f545SAneesh V better code density. For ARM architectures that support 4745356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 4755356f545SAneesh V GCC. 4765356f545SAneesh V 4775da627a4Swdenk- Linux Kernel Interface: 478c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 479c609719bSwdenk 480c609719bSwdenk U-Boot stores all clock information in Hz 481c609719bSwdenk internally. For binary compatibility with older Linux 482c609719bSwdenk kernels (which expect the clocks passed in the 483c609719bSwdenk bd_info data to be in MHz) the environment variable 484c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 485c609719bSwdenk converts clock data to MHZ before passing it to the 486c609719bSwdenk Linux kernel. 487c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 488c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 489c609719bSwdenk default environment. 490c609719bSwdenk 4915da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 4925da627a4Swdenk 49311ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 4945da627a4Swdenk expect it to be in bytes, others in MB. 4955da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 4965da627a4Swdenk 497fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 498f57f70aaSWolfgang Denk 499f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 500213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 501213bf8c8SGerald Van Baren concepts). 502213bf8c8SGerald Van Baren 503213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 504213bf8c8SGerald Van Baren * New libfdt-based support 505213bf8c8SGerald Van Baren * Adds the "fdt" command 5063bb342fcSKim Phillips * The bootm command automatically updates the fdt 507213bf8c8SGerald Van Baren 508b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 509b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 510b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 511b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 512f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 513c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 514f57f70aaSWolfgang Denk 51511ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 51611ccc33fSMarcel Ziswiler addresses 5173bb342fcSKim Phillips 5184e253137SKumar Gala CONFIG_OF_BOARD_SETUP 5194e253137SKumar Gala 5204e253137SKumar Gala Board code has addition modification that it wants to make 5214e253137SKumar Gala to the flat device tree before handing it off to the kernel 5226705d81eSwdenk 5230267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 5240267768eSMatthew McClintock 52511ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 5260267768eSMatthew McClintock param header, the default value is zero if undefined. 5270267768eSMatthew McClintock 5283887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 5293887c3fbSHeiko Schocher 5303887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 5313887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 5323887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 5333887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 5343887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 5353887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 5363887c3fbSHeiko Schocher 5377eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 5387eb29398SIgor Grinberg 5397eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 5407eb29398SIgor Grinberg machine type and must be used to specify the machine type 5417eb29398SIgor Grinberg number as it appears in the ARM machine registry 5427eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 5437eb29398SIgor Grinberg Only boards that have multiple machine types supported 5447eb29398SIgor Grinberg in a single configuration file and the machine type is 5457eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 5467eb29398SIgor Grinberg 5470b2f4ecaSNiklaus Giger- vxWorks boot parameters: 5480b2f4ecaSNiklaus Giger 5490b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 5500b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 5510b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 5520b2f4ecaSNiklaus Giger 5530b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5540b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5550b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5560b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5570b2f4ecaSNiklaus Giger 5580b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5590b2f4ecaSNiklaus Giger 5600b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5610b2f4ecaSNiklaus Giger 5620b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5630b2f4ecaSNiklaus Giger the defaults discussed just above. 5640b2f4ecaSNiklaus Giger 5652c451f78SAneesh V- Cache Configuration: 5662c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 5672c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 5682c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 5692c451f78SAneesh V 57093bc2193SAneesh V- Cache Configuration for ARM: 57193bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 57293bc2193SAneesh V controller 57393bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 57493bc2193SAneesh V controller register space 57593bc2193SAneesh V 5766705d81eSwdenk- Serial Ports: 57748d0192fSAndreas Engel CONFIG_PL010_SERIAL 5786705d81eSwdenk 5796705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 5806705d81eSwdenk 58148d0192fSAndreas Engel CONFIG_PL011_SERIAL 5826705d81eSwdenk 5836705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 5846705d81eSwdenk 5856705d81eSwdenk CONFIG_PL011_CLOCK 5866705d81eSwdenk 5876705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 5886705d81eSwdenk the clock speed of the UARTs. 5896705d81eSwdenk 5906705d81eSwdenk CONFIG_PL01x_PORTS 5916705d81eSwdenk 5926705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 5936705d81eSwdenk define this to a list of base addresses for each (supported) 5946705d81eSwdenk port. See e.g. include/configs/versatile.h 5956705d81eSwdenk 596910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 597910f1ae3SJohn Rigby 598910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 599910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 600910f1ae3SJohn Rigby this variable to initialize the extra register. 601910f1ae3SJohn Rigby 602910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 603910f1ae3SJohn Rigby 604910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 605910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 606910f1ae3SJohn Rigby variable to flush the UART at init time. 607910f1ae3SJohn Rigby 6086705d81eSwdenk 609c609719bSwdenk- Console Interface: 610c609719bSwdenk Depending on board, define exactly one serial port 611c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 612c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 613c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 614c609719bSwdenk 615c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 616c609719bSwdenk port routines must be defined elsewhere 617c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 618c609719bSwdenk 619c609719bSwdenk CONFIG_CFB_CONSOLE 620c609719bSwdenk Enables console device for a color framebuffer. Needs following 621c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 622c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 623c609719bSwdenk (default big endian) 624c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 625c609719bSwdenk rectangle fill 626c609719bSwdenk (cf. smiLynxEM) 627c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 628c609719bSwdenk bit-blit (cf. smiLynxEM) 629c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 630c609719bSwdenk (cols=pitch) 631c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 632c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 633c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 634c609719bSwdenk (0-5, cf. cfb_console.c) 635c609719bSwdenk VIDEO_FB_ADRS framebuffer address 636c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 637c609719bSwdenk (i.e. i8042_kbd_init()) 638c609719bSwdenk VIDEO_TSTC_FCT test char fct 639c609719bSwdenk (i.e. i8042_tstc) 640c609719bSwdenk VIDEO_GETC_FCT get char fct 641c609719bSwdenk (i.e. i8042_getc) 642c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 643c609719bSwdenk (requires blink timer 644c609719bSwdenk cf. i8042.c) 6456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 646c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 647c609719bSwdenk upper right corner 648602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 649c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 650c609719bSwdenk upper left corner 651a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 652a6c7ad2fSwdenk linux_logo.h for logo. 653a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 654c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 65511ccc33fSMarcel Ziswiler additional board info beside 656c609719bSwdenk the logo 657c609719bSwdenk 658c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 659c609719bSwdenk default i/o. Serial console can be forced with 660c609719bSwdenk environment 'console=serial'. 661c609719bSwdenk 662a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 663a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 664a3ad8e26Swdenk the "silent" environment variable. See 665a3ad8e26Swdenk doc/README.silent for more information. 666a3ad8e26Swdenk 667c609719bSwdenk- Console Baudrate: 668c609719bSwdenk CONFIG_BAUDRATE - in bps 669c609719bSwdenk Select one of the baudrates listed in 6706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 672c609719bSwdenk 673c92fac91SHeiko Schocher- Console Rx buffer length 674c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 675c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6762b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 677c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 678c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 679c92fac91SHeiko Schocher the SMC. 680c92fac91SHeiko Schocher 6819558b48aSGraeme Russ- Pre-Console Buffer: 6829558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 6839558b48aSGraeme Russ initialised etc) all console output is silently discarded. 6849558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 6859558b48aSGraeme Russ buffer any console messages prior to the console being 6869558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 6879558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 6889558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 6899558b48aSGraeme Russ bytes are output before the console is initialised, the 6909558b48aSGraeme Russ earlier bytes are discarded. 6919558b48aSGraeme Russ 6929558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 6939558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 6949558b48aSGraeme Russ 695046a37bdSSonny Rao- Safe printf() functions 696046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 697046a37bdSSonny Rao the printf() functions. These are defined in 698046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 699046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 700046a37bdSSonny Rao If this option is not given then these functions will 701046a37bdSSonny Rao silently discard their buffer size argument - this means 702046a37bdSSonny Rao you are not getting any overflow checking in this case. 703046a37bdSSonny Rao 704c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 705c609719bSwdenk Delay before automatically booting the default image; 706c609719bSwdenk set to -1 to disable autoboot. 707*93d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 708*93d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 709c609719bSwdenk 710c609719bSwdenk See doc/README.autoboot for these options that 711c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 712c609719bSwdenk CONFIG_BOOT_RETRY_TIME 713c609719bSwdenk CONFIG_BOOT_RETRY_MIN 714c609719bSwdenk CONFIG_AUTOBOOT_KEYED 715c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 716c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 717c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 718c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 719c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 720c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 721c609719bSwdenk CONFIG_RESET_TO_RETRY 722c609719bSwdenk 723c609719bSwdenk- Autoboot Command: 724c609719bSwdenk CONFIG_BOOTCOMMAND 725c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 726c609719bSwdenk define a command string that is automatically executed 727c609719bSwdenk when no character is read on the console interface 728c609719bSwdenk within "Boot Delay" after reset. 729c609719bSwdenk 730c609719bSwdenk CONFIG_BOOTARGS 731c609719bSwdenk This can be used to pass arguments to the bootm 732c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 733c609719bSwdenk environment value "bootargs". 734c609719bSwdenk 735c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 736c609719bSwdenk The value of these goes into the environment as 737c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 738c609719bSwdenk as a convenience, when switching between booting from 73911ccc33fSMarcel Ziswiler RAM and NFS. 740c609719bSwdenk 741c609719bSwdenk- Pre-Boot Commands: 742c609719bSwdenk CONFIG_PREBOOT 743c609719bSwdenk 744c609719bSwdenk When this option is #defined, the existence of the 745c609719bSwdenk environment variable "preboot" will be checked 746c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 747c609719bSwdenk countdown and/or running the auto-boot command resp. 748c609719bSwdenk entering interactive mode. 749c609719bSwdenk 750c609719bSwdenk This feature is especially useful when "preboot" is 751c609719bSwdenk automatically generated or modified. For an example 752c609719bSwdenk see the LWMON board specific code: here "preboot" is 753c609719bSwdenk modified when the user holds down a certain 754c609719bSwdenk combination of keys on the (special) keyboard when 755c609719bSwdenk booting the systems 756c609719bSwdenk 757c609719bSwdenk- Serial Download Echo Mode: 758c609719bSwdenk CONFIG_LOADS_ECHO 759c609719bSwdenk If defined to 1, all characters received during a 760c609719bSwdenk serial download (using the "loads" command) are 761c609719bSwdenk echoed back. This might be needed by some terminal 762c609719bSwdenk emulations (like "cu"), but may as well just take 763c609719bSwdenk time on others. This setting #define's the initial 764c609719bSwdenk value of the "loads_echo" environment variable. 765c609719bSwdenk 766602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 767c609719bSwdenk CONFIG_KGDB_BAUDRATE 768c609719bSwdenk Select one of the baudrates listed in 7696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 770c609719bSwdenk 771c609719bSwdenk- Monitor Functions: 772602ad3b3SJon Loeliger Monitor commands can be included or excluded 773602ad3b3SJon Loeliger from the build by using the #include files 774c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 775c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 776602ad3b3SJon Loeliger and augmenting with additional #define's 777602ad3b3SJon Loeliger for wanted commands. 778c609719bSwdenk 779602ad3b3SJon Loeliger The default command configuration includes all commands 780602ad3b3SJon Loeliger except those marked below with a "*". 781602ad3b3SJon Loeliger 782602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 783602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 784602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 785602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 786602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 787602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 788602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 789602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 790710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 791602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 792602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 793602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 794a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 795a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 796a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 797a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 798602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 799602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 800246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 801602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 802602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 8030c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 804bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 805602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 806602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 807602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 808602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 809602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 810a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 811a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 812602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 813602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 814602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 815602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 816602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 817602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 8180c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 819602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 820602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 821602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 822602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 8231ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 824d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 825d22c338eSJoe Hershberger (169.254.*.*) 826602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 827602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 82802c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 82902c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 830602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 83156523f12Swdenk loop, loopw, mtest 832602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 833602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 834602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 83568d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 836602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 837602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 838e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 839e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 840602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 841602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 842602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 843602ad3b3SJon Loeliger host 844602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 845602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 846602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 847602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 848602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 849602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 850602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 851602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 852602ad3b3SJon Loeliger (4xx only) 853f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 854c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 85502c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 85674de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 857602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 8587a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 8591fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 860ca366d0eSChe-liang Chiou CONFIG_CMD_TIME * run command and report execution time 861602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 862602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 863c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 864c609719bSwdenk 865c609719bSwdenk 866c609719bSwdenk EXAMPLE: If you want all functions except of network 867c609719bSwdenk support you can write: 868c609719bSwdenk 869602ad3b3SJon Loeliger #include "config_cmd_all.h" 870602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 871c609719bSwdenk 872213bf8c8SGerald Van Baren Other Commands: 873213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 874c609719bSwdenk 875c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 876602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 877c609719bSwdenk what you (and your U-Boot users) are doing. Data 878c609719bSwdenk cache cannot be enabled on systems like the 8xx or 879c609719bSwdenk 8260 (where accesses to the IMMR region must be 880c609719bSwdenk uncached), and it cannot be disabled on all other 881c609719bSwdenk systems where we (mis-) use the data cache to hold an 882c609719bSwdenk initial stack and some data. 883c609719bSwdenk 884c609719bSwdenk 885c609719bSwdenk XXX - this list needs to get updated! 886c609719bSwdenk 88745ba8077SSimon Glass- Device tree: 88845ba8077SSimon Glass CONFIG_OF_CONTROL 88945ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 89045ba8077SSimon Glass to configure its devices, instead of relying on statically 89145ba8077SSimon Glass compiled #defines in the board file. This option is 89245ba8077SSimon Glass experimental and only available on a few boards. The device 89345ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 89445ba8077SSimon Glass 8952c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 8962c0f79e4SSimon Glass be done using one of the two options below: 897bbb0b128SSimon Glass 898bbb0b128SSimon Glass CONFIG_OF_EMBED 899bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 900bbb0b128SSimon Glass binary in its image. This device tree file should be in the 901bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 902bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 903bbb0b128SSimon Glass the global data structure as gd->blob. 90445ba8077SSimon Glass 9052c0f79e4SSimon Glass CONFIG_OF_SEPARATE 9062c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 9072c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 9082c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 9092c0f79e4SSimon Glass 9102c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 9112c0f79e4SSimon Glass 9122c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 9132c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 9142c0f79e4SSimon Glass still use the individual files if you need something more 9152c0f79e4SSimon Glass exotic. 9162c0f79e4SSimon Glass 917c609719bSwdenk- Watchdog: 918c609719bSwdenk CONFIG_WATCHDOG 919c609719bSwdenk If this variable is defined, it enables watchdog 9206abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 9216abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 9226abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 9236abe6fb6SDetlev Zundel register. When supported for a specific SoC is 9246abe6fb6SDetlev Zundel available, then no further board specific code should 9256abe6fb6SDetlev Zundel be needed to use it. 9266abe6fb6SDetlev Zundel 9276abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 9286abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 9296abe6fb6SDetlev Zundel SoC, then define this variable and provide board 9306abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 931c609719bSwdenk 932c1551ea8Sstroese- U-Boot Version: 933c1551ea8Sstroese CONFIG_VERSION_VARIABLE 934c1551ea8Sstroese If this variable is defined, an environment variable 935c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 936c1551ea8Sstroese version as printed by the "version" command. 937a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 938a1ea8e51SBenoît Thébaudeau next reset. 939c1551ea8Sstroese 940c609719bSwdenk- Real-Time Clock: 941c609719bSwdenk 942602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 943c609719bSwdenk has to be selected, too. Define exactly one of the 944c609719bSwdenk following options: 945c609719bSwdenk 946c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 947c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 9484e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 949c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 9501cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 951c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 9527f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 9533bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 9549536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 9554c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 9566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 95771d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 95871d19f30SHeiko Schocher RV3029 RTC. 959c609719bSwdenk 960b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 961b37c7e5eSwdenk must also be configured. See I2C Support, below. 962b37c7e5eSwdenk 963e92739d3SPeter Tyser- GPIO Support: 964e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 965e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 966e92739d3SPeter Tyser 9675dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 9685dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 9695dec49caSChris Packham pins supported by a particular chip. 9705dec49caSChris Packham 971e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 972e92739d3SPeter Tyser must also be configured. See I2C Support, below. 973e92739d3SPeter Tyser 974c609719bSwdenk- Timestamp Support: 975c609719bSwdenk 976c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 977c609719bSwdenk (date and time) of an image is printed by image 978c609719bSwdenk commands like bootm or iminfo. This option is 979602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 980c609719bSwdenk 981923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 982923c46f9SKarl O. Pinc Zero or more of the following: 983923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 984923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 985923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 986923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 987923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 988923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 989923c46f9SKarl O. Pinc disk/part_efi.c 990923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 991c609719bSwdenk 992602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 993218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 994923c46f9SKarl O. Pinc least one non-MTD partition type as well. 995c609719bSwdenk 996c609719bSwdenk- IDE Reset method: 9974d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 9984d13cbadSwdenk board configurations files but used nowhere! 999c609719bSwdenk 10004d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 10014d13cbadSwdenk be performed by calling the function 10024d13cbadSwdenk ide_set_reset(int reset) 10034d13cbadSwdenk which has to be defined in a board specific file 1004c609719bSwdenk 1005c609719bSwdenk- ATAPI Support: 1006c609719bSwdenk CONFIG_ATAPI 1007c609719bSwdenk 1008c609719bSwdenk Set this to enable ATAPI support. 1009c609719bSwdenk 1010c40b2956Swdenk- LBA48 Support 1011c40b2956Swdenk CONFIG_LBA48 1012c40b2956Swdenk 1013c40b2956Swdenk Set this to enable support for disks larger than 137GB 10144b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1015c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1016c40b2956Swdenk support disks up to 2.1TB. 1017c40b2956Swdenk 10186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1019c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1020c40b2956Swdenk Default is 32bit. 1021c40b2956Swdenk 1022c609719bSwdenk- SCSI Support: 1023c609719bSwdenk At the moment only there is only support for the 1024c609719bSwdenk SYM53C8XX SCSI controller; define 1025c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1026c609719bSwdenk 10276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 10286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 10296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1030c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1031c609719bSwdenk devices. 10326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1033c609719bSwdenk 1034c609719bSwdenk- NETWORK Support (PCI): 1035682011ffSwdenk CONFIG_E1000 1036ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1037ce5207e1SKyle Moffett 1038ce5207e1SKyle Moffett CONFIG_E1000_SPI 1039ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1040ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1041ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1042ce5207e1SKyle Moffett 1043ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1044ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1045ce5207e1SKyle Moffett example with the "sspi" command. 1046ce5207e1SKyle Moffett 1047ce5207e1SKyle Moffett CONFIG_CMD_E1000 1048ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1049ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1050682011ffSwdenk 1051ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 105211ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1053ac3315c2SAndre Schwarz 1054c609719bSwdenk CONFIG_EEPRO100 1055c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 105611ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1057c609719bSwdenk write routine for first time initialisation. 1058c609719bSwdenk 1059c609719bSwdenk CONFIG_TULIP 1060c609719bSwdenk Support for Digital 2114x chips. 1061c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1062c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1063c609719bSwdenk 1064c609719bSwdenk CONFIG_NATSEMI 1065c609719bSwdenk Support for National dp83815 chips. 1066c609719bSwdenk 1067c609719bSwdenk CONFIG_NS8382X 1068c609719bSwdenk Support for National dp8382[01] gigabit chips. 1069c609719bSwdenk 107045219c46Swdenk- NETWORK Support (other): 107145219c46Swdenk 1072c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1073c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1074c041e9d2SJens Scharsig 1075c041e9d2SJens Scharsig CONFIG_RMII 1076c041e9d2SJens Scharsig Define this to use reduced MII inteface 1077c041e9d2SJens Scharsig 1078c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1079c041e9d2SJens Scharsig If this defined, the driver is quiet. 1080c041e9d2SJens Scharsig The driver doen't show link status messages. 1081c041e9d2SJens Scharsig 1082efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1083efdd7319SRob Herring Support for the Calxeda XGMAC device 1084efdd7319SRob Herring 108545219c46Swdenk CONFIG_DRIVER_LAN91C96 108645219c46Swdenk Support for SMSC's LAN91C96 chips. 108745219c46Swdenk 108845219c46Swdenk CONFIG_LAN91C96_BASE 108945219c46Swdenk Define this to hold the physical address 109045219c46Swdenk of the LAN91C96's I/O space 109145219c46Swdenk 109245219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 109345219c46Swdenk Define this to enable 32 bit addressing 109445219c46Swdenk 1095f39748aeSwdenk CONFIG_DRIVER_SMC91111 1096f39748aeSwdenk Support for SMSC's LAN91C111 chip 1097f39748aeSwdenk 1098f39748aeSwdenk CONFIG_SMC91111_BASE 1099f39748aeSwdenk Define this to hold the physical address 1100f39748aeSwdenk of the device (I/O space) 1101f39748aeSwdenk 1102f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1103f39748aeSwdenk Define this if data bus is 32 bits 1104f39748aeSwdenk 1105f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1106f39748aeSwdenk Define this to use i/o functions instead of macros 1107f39748aeSwdenk (some hardware wont work with macros) 1108f39748aeSwdenk 1109dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1110dc02badaSHeiko Schocher Support for davinci emac 1111dc02badaSHeiko Schocher 1112dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1113dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1114dc02badaSHeiko Schocher 1115b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1116b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1117b3dbf4a5SMacpaul Lin 1118b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1119b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1120b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1121b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1122b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1123b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1124b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1125b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1126b3dbf4a5SMacpaul Lin 1127c2fff331SMike Rapoport CONFIG_SMC911X 1128557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1129557b377dSJens Gehrlein 1130c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1131557b377dSJens Gehrlein Define this to hold the physical address 1132557b377dSJens Gehrlein of the device (I/O space) 1133557b377dSJens Gehrlein 1134c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1135557b377dSJens Gehrlein Define this if data bus is 32 bits 1136557b377dSJens Gehrlein 1137c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1138557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1139557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1140c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1141557b377dSJens Gehrlein 11423d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 11433d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 11443d0075faSYoshihiro Shimoda 11453d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 11463d0075faSYoshihiro Shimoda Define the number of ports to be used 11473d0075faSYoshihiro Shimoda 11483d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 11493d0075faSYoshihiro Shimoda Define the ETH PHY's address 11503d0075faSYoshihiro Shimoda 115168260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 115268260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 115368260aabSYoshihiro Shimoda 11545e124724SVadim Bendebury- TPM Support: 11555e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 11565e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 11575e124724SVadim Bendebury per system is supported at this time. 11585e124724SVadim Bendebury 11595e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 11605e124724SVadim Bendebury Base address where the generic TPM device is mapped 11615e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 11625e124724SVadim Bendebury 0xfed40000. 11635e124724SVadim Bendebury 1164c609719bSwdenk- USB Support: 1165c609719bSwdenk At the moment only the UHCI host controller is 11664d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1167c609719bSwdenk CONFIG_USB_UHCI to enable it. 1168c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 116930d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1170c609719bSwdenk storage devices. 1171c609719bSwdenk Note: 1172c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1173c609719bSwdenk (TEAC FD-05PUB). 11744d13cbadSwdenk MPC5200 USB requires additional defines: 11754d13cbadSwdenk CONFIG_USB_CLOCK 11764d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1177307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1178307ecb6dSEric Millbrandt for USB on PSC3 11794d13cbadSwdenk CONFIG_USB_CONFIG 11804d13cbadSwdenk for differential drivers: 0x00001000 11814d13cbadSwdenk for single ended drivers: 0x00005000 1182307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1183307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 11846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1185fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1186fdcfaa1bSZhang Wei instead of using asynchronous interrupts 11874d13cbadSwdenk 11889ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 11899ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 11909ab4ce22SSimon Glass 119116c8d5e7SWolfgang Denk- USB Device: 119216c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 119316c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 119416c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 119511ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 119616c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 119716c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 119816c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 119916c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 120016c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 120116c8d5e7SWolfgang Denk a Linux host by 120216c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 120316c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 120416c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 120516c8d5e7SWolfgang Denk might be defined in YourBoardName.h 120616c8d5e7SWolfgang Denk 120716c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 120816c8d5e7SWolfgang Denk Define this to build a UDC device 120916c8d5e7SWolfgang Denk 121016c8d5e7SWolfgang Denk CONFIG_USB_TTY 121116c8d5e7SWolfgang Denk Define this to have a tty type of device available to 121216c8d5e7SWolfgang Denk talk to the UDC device 121316c8d5e7SWolfgang Denk 1214f9da0f89SVipin KUMAR CONFIG_USBD_HS 1215f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1216f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1217f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1218f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1219f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1220f9da0f89SVipin KUMAR speed. 1221f9da0f89SVipin KUMAR 12226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 122316c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 122416c8d5e7SWolfgang Denk be set to usbtty. 122516c8d5e7SWolfgang Denk 122616c8d5e7SWolfgang Denk mpc8xx: 12276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 122816c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 12296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 123016c8d5e7SWolfgang Denk 12316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 123216c8d5e7SWolfgang Denk Derive USB clock from brgclk 12336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 123416c8d5e7SWolfgang Denk 123516c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 123616c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 123716c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 123816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 123916c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 124016c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 124116c8d5e7SWolfgang Denk 124216c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 124316c8d5e7SWolfgang Denk Define this string as the name of your company for 124416c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 124516c8d5e7SWolfgang Denk 124616c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 124716c8d5e7SWolfgang Denk Define this string as the name of your product 124816c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 124916c8d5e7SWolfgang Denk 125016c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 125116c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 125216c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 125316c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 125416c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 125516c8d5e7SWolfgang Denk 125616c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 125716c8d5e7SWolfgang Denk Define this as the unique Product ID 125816c8d5e7SWolfgang Denk for your device 125916c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1260c609719bSwdenk 1261d70a560fSIgor Grinberg- ULPI Layer Support: 1262d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1263d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1264d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1265d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1266d70a560fSIgor Grinberg viewport is supported. 1267d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1268d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 1269c609719bSwdenk 1270c609719bSwdenk- MMC Support: 1271c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1272c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1273c609719bSwdenk accessed from the boot prompt by mapping the device 1274c609719bSwdenk to physical memory similar to flash. Command line is 1275602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1276602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1277c609719bSwdenk 1278afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1279afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1280afb35666SYoshihiro Shimoda 1281afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1282afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1283afb35666SYoshihiro Shimoda 1284afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1285afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1286afb35666SYoshihiro Shimoda 12876705d81eSwdenk- Journaling Flash filesystem support: 12886705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 12896705d81eSwdenk CONFIG_JFFS2_NAND_DEV 12906705d81eSwdenk Define these for a default partition on a NAND device 12916705d81eSwdenk 12926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 12936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 12946705d81eSwdenk Define these for a default partition on a NOR device 12956705d81eSwdenk 12966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 12976705d81eSwdenk Define this to create an own partition. You have to provide a 12986705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 12996705d81eSwdenk 13006705d81eSwdenk If you define only one JFFS2 partition you may also want to 13016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 13026705d81eSwdenk to disable the command chpart. This is the default when you 13036705d81eSwdenk have not defined a custom partition 13046705d81eSwdenk 1305c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1306c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1307656f4c65SDonggeun Kim 1308656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1309656f4c65SDonggeun Kim file in FAT formatted partition. 1310656f4c65SDonggeun Kim 1311656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1312656f4c65SDonggeun Kim user to write files to FAT. 1313c30a15e5SDonggeun Kim 1314c609719bSwdenk- Keyboard Support: 1315c609719bSwdenk CONFIG_ISA_KEYBOARD 1316c609719bSwdenk 1317c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1318c609719bSwdenk support 1319c609719bSwdenk 1320c609719bSwdenk CONFIG_I8042_KBD 1321c609719bSwdenk Standard PC keyboard driver with US (is default) and 1322c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1323c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1324c609719bSwdenk for cfb_console. Supports cursor blinking. 1325c609719bSwdenk 1326c609719bSwdenk- Video support: 1327c609719bSwdenk CONFIG_VIDEO 1328c609719bSwdenk 1329c609719bSwdenk Define this to enable video support (for output to 1330c609719bSwdenk video). 1331c609719bSwdenk 1332c609719bSwdenk CONFIG_VIDEO_CT69000 1333c609719bSwdenk 1334c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1335c609719bSwdenk 1336c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1337eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1338eeb1b77bSwdenk video output is selected via environment 'videoout' 1339eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1340eeb1b77bSwdenk assumed. 1341c609719bSwdenk 1342eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 134311ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1344eeb1b77bSwdenk are possible: 1345eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1346eeb1b77bSwdenk Following standard modes are supported (* is default): 1347eeb1b77bSwdenk 1348eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1349eeb1b77bSwdenk -------------+--------------------------------------------- 1350eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1351eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1352eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1353eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1354eeb1b77bSwdenk -------------+--------------------------------------------- 1355c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1356c609719bSwdenk 1357eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 13587817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1359eeb1b77bSwdenk 1360eeb1b77bSwdenk 1361a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1362a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1363a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1364a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1365a6c7ad2fSwdenk 13667d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 13677d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 13687d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 13697d3053fbSTimur Tabi support, and should also define these other macros: 13707d3053fbSTimur Tabi 13717d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 13727d3053fbSTimur Tabi CONFIG_VIDEO 13737d3053fbSTimur Tabi CONFIG_CMD_BMP 13747d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 13757d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 13767d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 13777d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 13787d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 13797d3053fbSTimur Tabi 1380ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1381ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1382ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1383ba8e76bdSTimur Tabi description of this variable. 13847d3053fbSTimur Tabi 1385682011ffSwdenk- Keyboard Support: 1386682011ffSwdenk CONFIG_KEYBOARD 1387682011ffSwdenk 1388682011ffSwdenk Define this to enable a custom keyboard support. 1389682011ffSwdenk This simply calls drv_keyboard_init() which must be 1390682011ffSwdenk defined in your board-specific files. 1391682011ffSwdenk The only board using this so far is RBC823. 1392a6c7ad2fSwdenk 1393c609719bSwdenk- LCD Support: CONFIG_LCD 1394c609719bSwdenk 1395c609719bSwdenk Define this to enable LCD support (for output to LCD 1396c609719bSwdenk display); also select one of the supported displays 1397c609719bSwdenk by defining one of these: 1398c609719bSwdenk 139939cf4804SStelian Pop CONFIG_ATMEL_LCD: 140039cf4804SStelian Pop 140139cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 140239cf4804SStelian Pop 1403fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1404c609719bSwdenk 1405fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1406c609719bSwdenk 1407fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1408c609719bSwdenk 1409fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1410fd3103bbSwdenk Active, color, single scan. 1411fd3103bbSwdenk 1412fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1413fd3103bbSwdenk 1414fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1415c609719bSwdenk Active, color, single scan. 1416c609719bSwdenk 1417c609719bSwdenk CONFIG_SHARP_16x9 1418c609719bSwdenk 1419c609719bSwdenk Sharp 320x240. Active, color, single scan. 1420c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1421c609719bSwdenk 1422c609719bSwdenk CONFIG_SHARP_LQ64D341 1423c609719bSwdenk 1424c609719bSwdenk Sharp LQ64D341 display, 640x480. 1425c609719bSwdenk Active, color, single scan. 1426c609719bSwdenk 1427c609719bSwdenk CONFIG_HLD1045 1428c609719bSwdenk 1429c609719bSwdenk HLD1045 display, 640x480. 1430c609719bSwdenk Active, color, single scan. 1431c609719bSwdenk 1432c609719bSwdenk CONFIG_OPTREX_BW 1433c609719bSwdenk 1434c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1435c609719bSwdenk or 1436c609719bSwdenk Hitachi LMG6912RPFC-00T 1437c609719bSwdenk or 1438c609719bSwdenk Hitachi SP14Q002 1439c609719bSwdenk 1440c609719bSwdenk 320x240. Black & white. 1441c609719bSwdenk 1442c609719bSwdenk Normally display is black on white background; define 14436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1444c609719bSwdenk 14457152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1446d791b1dcSwdenk 1447d791b1dcSwdenk If this option is set, the environment is checked for 1448d791b1dcSwdenk a variable "splashimage". If found, the usual display 1449d791b1dcSwdenk of logo, copyright and system information on the LCD 1450e94d2cd9Swdenk is suppressed and the BMP image at the address 1451d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1452d791b1dcSwdenk console is redirected to the "nulldev", too. This 1453d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1454d791b1dcSwdenk loaded very quickly after power-on. 1455d791b1dcSwdenk 14561ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 14571ca298ceSMatthias Weisser 14581ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 14591ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 14601ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 14611ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 14621ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 14631ca298ceSMatthias Weisser specify 'm' for centering the image. 14641ca298ceSMatthias Weisser 14651ca298ceSMatthias Weisser Example: 14661ca298ceSMatthias Weisser setenv splashpos m,m 14671ca298ceSMatthias Weisser => image at center of screen 14681ca298ceSMatthias Weisser 14691ca298ceSMatthias Weisser setenv splashpos 30,20 14701ca298ceSMatthias Weisser => image at x = 30 and y = 20 14711ca298ceSMatthias Weisser 14721ca298ceSMatthias Weisser setenv splashpos -10,m 14731ca298ceSMatthias Weisser => vertically centered image 14741ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 14751ca298ceSMatthias Weisser 147698f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 147798f4a3dfSStefan Roese 147898f4a3dfSStefan Roese If this option is set, additionally to standard BMP 147998f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 148098f4a3dfSStefan Roese splashscreen support or the bmp command. 148198f4a3dfSStefan Roese 1482d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1483d5011762SAnatolij Gustschin 1484d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1485d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1486d5011762SAnatolij Gustschin bmp command. 1487d5011762SAnatolij Gustschin 1488f2b96dfbSLei Wen- Do compresssing for memory range: 1489f2b96dfbSLei Wen CONFIG_CMD_ZIP 1490f2b96dfbSLei Wen 1491f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1492f2b96dfbSLei Wen to compress the specified memory at its best effort. 1493f2b96dfbSLei Wen 1494c29fdfc1Swdenk- Compression support: 1495c29fdfc1Swdenk CONFIG_BZIP2 1496c29fdfc1Swdenk 1497c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1498c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1499c29fdfc1Swdenk compressed images are supported. 1500c29fdfc1Swdenk 1501c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 15026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1503c29fdfc1Swdenk be at least 4MB. 1504d791b1dcSwdenk 1505fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1506fc9c1727SLuigi 'Comio' Mantellini 1507fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1508fc9c1727SLuigi 'Comio' Mantellini images is included. 1509fc9c1727SLuigi 'Comio' Mantellini 1510fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1511fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1512fc9c1727SLuigi 'Comio' Mantellini formula: 1513fc9c1727SLuigi 'Comio' Mantellini 1514fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1515fc9c1727SLuigi 'Comio' Mantellini 1516fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1517fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1518fc9c1727SLuigi 'Comio' Mantellini 1519fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1520fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1521fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1522fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1523fc9c1727SLuigi 'Comio' Mantellini 1524fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1525fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 15266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1527fc9c1727SLuigi 'Comio' Mantellini 152817ea1177Swdenk- MII/PHY support: 152917ea1177Swdenk CONFIG_PHY_ADDR 153017ea1177Swdenk 153117ea1177Swdenk The address of PHY on MII bus. 153217ea1177Swdenk 153317ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 153417ea1177Swdenk 153517ea1177Swdenk The clock frequency of the MII bus 153617ea1177Swdenk 153717ea1177Swdenk CONFIG_PHY_GIGE 153817ea1177Swdenk 153917ea1177Swdenk If this option is set, support for speed/duplex 154011ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 154117ea1177Swdenk 154217ea1177Swdenk CONFIG_PHY_RESET_DELAY 154317ea1177Swdenk 154417ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 154517ea1177Swdenk reset before any MII register access is possible. 154617ea1177Swdenk For such PHY, set this option to the usec delay 154717ea1177Swdenk required. (minimum 300usec for LXT971A) 154817ea1177Swdenk 154917ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 155017ea1177Swdenk 155117ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 155217ea1177Swdenk command issued before MII status register can be read 155317ea1177Swdenk 1554c609719bSwdenk- Ethernet address: 1555c609719bSwdenk CONFIG_ETHADDR 1556c68a05feSrichardretanubun CONFIG_ETH1ADDR 1557c609719bSwdenk CONFIG_ETH2ADDR 1558c609719bSwdenk CONFIG_ETH3ADDR 1559c68a05feSrichardretanubun CONFIG_ETH4ADDR 1560c68a05feSrichardretanubun CONFIG_ETH5ADDR 1561c609719bSwdenk 156211ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 156311ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1564c609719bSwdenk is not determined automatically. 1565c609719bSwdenk 1566c609719bSwdenk- IP address: 1567c609719bSwdenk CONFIG_IPADDR 1568c609719bSwdenk 1569c609719bSwdenk Define a default value for the IP address to use for 157011ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1571c609719bSwdenk determined through e.g. bootp. 15721ebcd654SWolfgang Denk (Environment variable "ipaddr") 1573c609719bSwdenk 1574c609719bSwdenk- Server IP address: 1575c609719bSwdenk CONFIG_SERVERIP 1576c609719bSwdenk 1577c609719bSwdenk Defines a default value for the IP address of a TFTP 1578c609719bSwdenk server to contact when using the "tftboot" command. 15791ebcd654SWolfgang Denk (Environment variable "serverip") 1580c609719bSwdenk 158197cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 158297cfe861SRobin Getz 158397cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 158497cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 158597cfe861SRobin Getz 15861ebcd654SWolfgang Denk- Gateway IP address: 15871ebcd654SWolfgang Denk CONFIG_GATEWAYIP 15881ebcd654SWolfgang Denk 15891ebcd654SWolfgang Denk Defines a default value for the IP address of the 15901ebcd654SWolfgang Denk default router where packets to other networks are 15911ebcd654SWolfgang Denk sent to. 15921ebcd654SWolfgang Denk (Environment variable "gatewayip") 15931ebcd654SWolfgang Denk 15941ebcd654SWolfgang Denk- Subnet mask: 15951ebcd654SWolfgang Denk CONFIG_NETMASK 15961ebcd654SWolfgang Denk 15971ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 15981ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 15991ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 16001ebcd654SWolfgang Denk forwarded through a router. 16011ebcd654SWolfgang Denk (Environment variable "netmask") 16021ebcd654SWolfgang Denk 160353a5c424SDavid Updegraff- Multicast TFTP Mode: 160453a5c424SDavid Updegraff CONFIG_MCAST_TFTP 160553a5c424SDavid Updegraff 160653a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 160753a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 160811ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 160953a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 161053a5c424SDavid Updegraff multicast group. 161153a5c424SDavid Updegraff 1612c609719bSwdenk- BOOTP Recovery Mode: 1613c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1614c609719bSwdenk 1615c609719bSwdenk If you have many targets in a network that try to 1616c609719bSwdenk boot using BOOTP, you may want to avoid that all 1617c609719bSwdenk systems send out BOOTP requests at precisely the same 1618c609719bSwdenk moment (which would happen for instance at recovery 1619c609719bSwdenk from a power failure, when all systems will try to 1620c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1621c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1622c609719bSwdenk inserted before sending out BOOTP requests. The 16236c33c785SWolfgang Denk following delays are inserted then: 1624c609719bSwdenk 1625c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1626c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1627c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1628c609719bSwdenk 4th and following 1629c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1630c609719bSwdenk 1631fe389a82Sstroese- DHCP Advanced Options: 16321fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 16331fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1634fe389a82Sstroese 16351fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 16361fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 16371fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 16381fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 16391fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 16401fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 16411fe80d79SJon Loeliger CONFIG_BOOTP_DNS 16421fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 16431fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 16441fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 16451fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 16461fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 16472c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1648fe389a82Sstroese 16495d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 16505d110f0aSWilson Callan environment variable, not the BOOTP server. 1651fe389a82Sstroese 16522c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 16532c00e099SJoe Hershberger after the configured retry count, the call will fail 16542c00e099SJoe Hershberger instead of starting over. This can be used to fail over 16552c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 16562c00e099SJoe Hershberger is not available. 16572c00e099SJoe Hershberger 1658fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1659fe389a82Sstroese serverip from a DHCP server, it is possible that more 1660fe389a82Sstroese than one DNS serverip is offered to the client. 1661fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1662fe389a82Sstroese serverip will be stored in the additional environment 1663fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1664fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 16651fe80d79SJon Loeliger is defined. 1666fe389a82Sstroese 1667fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1668fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1669fe389a82Sstroese need the hostname of the DHCP requester. 16705d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 16711fe80d79SJon Loeliger of the "hostname" environment variable is passed as 16721fe80d79SJon Loeliger option 12 to the DHCP server. 1673fe389a82Sstroese 1674d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1675d9a2f416SAras Vaichas 1676d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1677d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1678d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1679d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1680d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1681d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1682d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1683d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1684d9a2f416SAras Vaichas that one of the retries will be successful but note that 1685d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1686d9a2f416SAras Vaichas this delay. 1687d9a2f416SAras Vaichas 1688d22c338eSJoe Hershberger - Link-local IP address negotiation: 1689d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1690d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1691d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1692d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1693d22c338eSJoe Hershberger 1694d22c338eSJoe Hershberger See doc/README.link-local for more information. 1695d22c338eSJoe Hershberger 1696a3d991bdSwdenk - CDP Options: 1697a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1698a3d991bdSwdenk 1699a3d991bdSwdenk The device id used in CDP trigger frames. 1700a3d991bdSwdenk 1701a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1702a3d991bdSwdenk 1703a3d991bdSwdenk A two character string which is prefixed to the MAC address 1704a3d991bdSwdenk of the device. 1705a3d991bdSwdenk 1706a3d991bdSwdenk CONFIG_CDP_PORT_ID 1707a3d991bdSwdenk 1708a3d991bdSwdenk A printf format string which contains the ascii name of 1709a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 171011ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1711a3d991bdSwdenk 1712a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1713a3d991bdSwdenk 1714a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1715a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1716a3d991bdSwdenk 1717a3d991bdSwdenk CONFIG_CDP_VERSION 1718a3d991bdSwdenk 1719a3d991bdSwdenk An ascii string containing the version of the software. 1720a3d991bdSwdenk 1721a3d991bdSwdenk CONFIG_CDP_PLATFORM 1722a3d991bdSwdenk 1723a3d991bdSwdenk An ascii string containing the name of the platform. 1724a3d991bdSwdenk 1725a3d991bdSwdenk CONFIG_CDP_TRIGGER 1726a3d991bdSwdenk 1727a3d991bdSwdenk A 32bit integer sent on the trigger. 1728a3d991bdSwdenk 1729a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1730a3d991bdSwdenk 1731a3d991bdSwdenk A 16bit integer containing the power consumption of the 1732a3d991bdSwdenk device in .1 of milliwatts. 1733a3d991bdSwdenk 1734a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1735a3d991bdSwdenk 1736a3d991bdSwdenk A byte containing the id of the VLAN. 1737a3d991bdSwdenk 1738c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1739c609719bSwdenk 1740c609719bSwdenk Several configurations allow to display the current 1741c609719bSwdenk status using a LED. For instance, the LED will blink 1742c609719bSwdenk fast while running U-Boot code, stop blinking as 1743c609719bSwdenk soon as a reply to a BOOTP request was received, and 1744c609719bSwdenk start blinking slow once the Linux kernel is running 1745c609719bSwdenk (supported by a status LED driver in the Linux 1746c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1747c609719bSwdenk feature in U-Boot. 1748c609719bSwdenk 1749c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1750c609719bSwdenk 1751c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1752c609719bSwdenk on those systems that support this (optional) 1753c609719bSwdenk feature, like the TQM8xxL modules. 1754c609719bSwdenk 1755c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1756c609719bSwdenk 1757b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1758b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 175911ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1760c609719bSwdenk 1761b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1762602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1763b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1764b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1765c609719bSwdenk command line interface. 1766c609719bSwdenk 1767bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1768c609719bSwdenk 1769b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1770b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1771b37c7e5eSwdenk support for I2C. 1772c609719bSwdenk 1773b37c7e5eSwdenk There are several other quantities that must also be 1774b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1775c609719bSwdenk 17766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1777b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 17786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 177911ccc33fSMarcel Ziswiler the CPU's i2c node address). 1780c609719bSwdenk 17818d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1782a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 17838d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 17848d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 17858d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1786b37c7e5eSwdenk 17875da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 17885da71efaSEric Millbrandt 17895da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 17905da71efaSEric Millbrandt chips might think that the current transfer is still 17915da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 17925da71efaSEric Millbrandt commands until the slave device responds. 17935da71efaSEric Millbrandt 1794b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1795b37c7e5eSwdenk 1796b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1797b37c7e5eSwdenk then the following macros need to be defined (examples are 1798b37c7e5eSwdenk from include/configs/lwmon.h): 1799c609719bSwdenk 1800c609719bSwdenk I2C_INIT 1801c609719bSwdenk 1802b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1803c609719bSwdenk controller or configure ports. 1804c609719bSwdenk 1805b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1806b37c7e5eSwdenk 1807c609719bSwdenk I2C_PORT 1808c609719bSwdenk 1809c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1810c609719bSwdenk assumes both bits are on the same port). Valid values 1811c609719bSwdenk are 0..3 for ports A..D. 1812c609719bSwdenk 1813c609719bSwdenk I2C_ACTIVE 1814c609719bSwdenk 1815c609719bSwdenk The code necessary to make the I2C data line active 1816c609719bSwdenk (driven). If the data line is open collector, this 1817c609719bSwdenk define can be null. 1818c609719bSwdenk 1819b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1820b37c7e5eSwdenk 1821c609719bSwdenk I2C_TRISTATE 1822c609719bSwdenk 1823c609719bSwdenk The code necessary to make the I2C data line tri-stated 1824c609719bSwdenk (inactive). If the data line is open collector, this 1825c609719bSwdenk define can be null. 1826c609719bSwdenk 1827b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1828b37c7e5eSwdenk 1829c609719bSwdenk I2C_READ 1830c609719bSwdenk 1831c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1832c609719bSwdenk FALSE if it is low. 1833c609719bSwdenk 1834b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1835b37c7e5eSwdenk 1836c609719bSwdenk I2C_SDA(bit) 1837c609719bSwdenk 1838c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1839c609719bSwdenk is FALSE, it clears it (low). 1840c609719bSwdenk 1841b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1842b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1843b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1844b37c7e5eSwdenk 1845c609719bSwdenk I2C_SCL(bit) 1846c609719bSwdenk 1847c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1848c609719bSwdenk is FALSE, it clears it (low). 1849c609719bSwdenk 1850b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1851b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1852b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1853b37c7e5eSwdenk 1854c609719bSwdenk I2C_DELAY 1855c609719bSwdenk 1856c609719bSwdenk This delay is invoked four times per clock cycle so this 1857c609719bSwdenk controls the rate of data transfer. The data rate thus 1858b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1859b37c7e5eSwdenk like: 1860b37c7e5eSwdenk 1861b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1862c609719bSwdenk 1863793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1864793b5726SMike Frysinger 1865793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1866793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1867793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1868793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1869793b5726SMike Frysinger 1870793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1871793b5726SMike Frysinger the generic GPIO functions. 1872793b5726SMike Frysinger 18736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 187447cd00faSwdenk 187547cd00faSwdenk When a board is reset during an i2c bus transfer 187647cd00faSwdenk chips might think that the current transfer is still 187747cd00faSwdenk in progress. On some boards it is possible to access 187847cd00faSwdenk the i2c SCLK line directly, either by using the 187947cd00faSwdenk processor pin as a GPIO or by having a second pin 188047cd00faSwdenk connected to the bus. If this option is defined a 188147cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 188247cd00faSwdenk is run early in the boot sequence. 188347cd00faSwdenk 188426a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 188526a33504SRichard Retanubun 188626a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 188726a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 188826a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 188926a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 189026a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 189126a33504SRichard Retanubun controller provide such a method. It is called at the end of 189226a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 189326a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 189426a33504SRichard Retanubun 189517ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 189617ea1177Swdenk 189717ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 189817ea1177Swdenk in u-boot bd_info structure based on u-boot environment 189917ea1177Swdenk variable "i2cfast". (see also i2cfast) 190017ea1177Swdenk 1901bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1902bb99ad6dSBen Warren 1903bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1904bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1905bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1906bb99ad6dSBen Warren Note that bus numbering is zero-based. 1907bb99ad6dSBen Warren 19086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1909bb99ad6dSBen Warren 1910bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 19110f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 19120f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 19130f89c54bSPeter Tyser a 1D array of device addresses 1914bb99ad6dSBen Warren 1915bb99ad6dSBen Warren e.g. 1916bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 19176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1918bb99ad6dSBen Warren 1919bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1920bb99ad6dSBen Warren 1921bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 19226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1923bb99ad6dSBen Warren 1924bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1925bb99ad6dSBen Warren 19266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1927be5e6181STimur Tabi 1928be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1929be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1930be5e6181STimur Tabi 19316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 19320dc018ecSStefan Roese 19330dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 19340dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 19350dc018ecSStefan Roese 19366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 19370dc018ecSStefan Roese 19380dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 19390dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 19400dc018ecSStefan Roese 19416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 19429ebbb54fSVictor Gallardo 19439ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 19449ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 19459ebbb54fSVictor Gallardo specified DTT device. 19469ebbb54fSVictor Gallardo 1947be5e6181STimur Tabi CONFIG_FSL_I2C 1948be5e6181STimur Tabi 1949be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 19507817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1951be5e6181STimur Tabi 195267b23a32SHeiko Schocher CONFIG_I2C_MUX 195367b23a32SHeiko Schocher 195467b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 195567b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 195667b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 195767b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 195867b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 195967b23a32SHeiko Schocher the muxes to activate this new "bus". 196067b23a32SHeiko Schocher 196167b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 196267b23a32SHeiko Schocher feature! 196367b23a32SHeiko Schocher 196467b23a32SHeiko Schocher Example: 196567b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 196667b23a32SHeiko Schocher The First mux with address 70 and channel 6 196767b23a32SHeiko Schocher The Second mux with address 71 and channel 4 196867b23a32SHeiko Schocher 196967b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 197067b23a32SHeiko Schocher 197167b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 197267b23a32SHeiko Schocher of I2C Busses with muxes: 197367b23a32SHeiko Schocher 197467b23a32SHeiko Schocher => i2c bus 197567b23a32SHeiko Schocher Busses reached over muxes: 197667b23a32SHeiko Schocher Bus ID: 2 197767b23a32SHeiko Schocher reached over Mux(es): 197867b23a32SHeiko Schocher pca9544a@70 ch: 4 197967b23a32SHeiko Schocher Bus ID: 3 198067b23a32SHeiko Schocher reached over Mux(es): 198167b23a32SHeiko Schocher pca9544a@70 ch: 6 198267b23a32SHeiko Schocher pca9544a@71 ch: 4 198367b23a32SHeiko Schocher => 198467b23a32SHeiko Schocher 198567b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1986f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1987f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 198867b23a32SHeiko Schocher the channel 4. 198967b23a32SHeiko Schocher 199067b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1991f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 199267b23a32SHeiko Schocher the 2 muxes. 199367b23a32SHeiko Schocher 199467b23a32SHeiko Schocher This option is actually implemented for the bitbanging 199567b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 199667b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 199767b23a32SHeiko Schocher to add this option to other architectures. 199867b23a32SHeiko Schocher 19992ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 20002ac6985aSAndrew Dyer 20012ac6985aSAndrew Dyer defining this will force the i2c_read() function in 20022ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 20032ac6985aSAndrew Dyer between writing the address pointer and reading the 20042ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 20052ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 20062ac6985aSAndrew Dyer devices can use either method, but some require one or 20072ac6985aSAndrew Dyer the other. 2008be5e6181STimur Tabi 2009c609719bSwdenk- SPI Support: CONFIG_SPI 2010c609719bSwdenk 2011c609719bSwdenk Enables SPI driver (so far only tested with 2012c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2013c609719bSwdenk D/As on the SACSng board) 2014c609719bSwdenk 20156639562eSYoshihiro Shimoda CONFIG_SH_SPI 20166639562eSYoshihiro Shimoda 20176639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 20186639562eSYoshihiro Shimoda only SH7757 is supported. 20196639562eSYoshihiro Shimoda 2020c609719bSwdenk CONFIG_SPI_X 2021c609719bSwdenk 2022c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2023c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2024c609719bSwdenk 2025c609719bSwdenk CONFIG_SOFT_SPI 2026c609719bSwdenk 2027c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2028c609719bSwdenk using hardware support. This is a general purpose 2029c609719bSwdenk driver that only requires three general I/O port pins 2030c609719bSwdenk (two outputs, one input) to function. If this is 2031c609719bSwdenk defined, the board configuration must define several 2032c609719bSwdenk SPI configuration items (port pins to use, etc). For 2033c609719bSwdenk an example, see include/configs/sacsng.h. 2034c609719bSwdenk 203504a9e118SBen Warren CONFIG_HARD_SPI 203604a9e118SBen Warren 203704a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 203804a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 203904a9e118SBen Warren must define a list of chip-select function pointers. 204004a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 204104a9e118SBen Warren example, see include/configs/mpc8349emds.h. 204204a9e118SBen Warren 204338254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 204438254f45SGuennadi Liakhovetski 204538254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 20462e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 204738254f45SGuennadi Liakhovetski 20480133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 20490133502eSMatthias Fuchs 20500133502eSMatthias Fuchs Enables FPGA subsystem. 20510133502eSMatthias Fuchs 20520133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 20530133502eSMatthias Fuchs 20540133502eSMatthias Fuchs Enables support for specific chip vendors. 20550133502eSMatthias Fuchs (ALTERA, XILINX) 20560133502eSMatthias Fuchs 20570133502eSMatthias Fuchs CONFIG_FPGA_<family> 20580133502eSMatthias Fuchs 20590133502eSMatthias Fuchs Enables support for FPGA family. 20600133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 20610133502eSMatthias Fuchs 20620133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2063c609719bSwdenk 2064c609719bSwdenk Specify the number of FPGA devices to support. 2065c609719bSwdenk 20666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2067c609719bSwdenk 2068c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2069c609719bSwdenk 20706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2071c609719bSwdenk 2072c609719bSwdenk Enable checks on FPGA configuration interface busy 2073c609719bSwdenk status by the configuration function. This option 2074c609719bSwdenk will require a board or device specific function to 2075c609719bSwdenk be written. 2076c609719bSwdenk 2077c609719bSwdenk CONFIG_FPGA_DELAY 2078c609719bSwdenk 2079c609719bSwdenk If defined, a function that provides delays in the FPGA 2080c609719bSwdenk configuration driver. 2081c609719bSwdenk 20826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2083c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2084c609719bSwdenk 20856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2086c609719bSwdenk 2087c609719bSwdenk Check for configuration errors during FPGA bitfile 2088c609719bSwdenk loading. For example, abort during Virtex II 2089c609719bSwdenk configuration if the INIT_B line goes low (which 2090c609719bSwdenk indicated a CRC error). 2091c609719bSwdenk 20926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2093c609719bSwdenk 2094c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2095c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2096c609719bSwdenk FPGA configuration sequence. The default time is 500 209711ccc33fSMarcel Ziswiler ms. 2098c609719bSwdenk 20996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2100c609719bSwdenk 2101c609719bSwdenk Maximum time to wait for BUSY to deassert during 210211ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2103c609719bSwdenk 21046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2105c609719bSwdenk 2106c609719bSwdenk Time to wait after FPGA configuration. The default is 210711ccc33fSMarcel Ziswiler 200 ms. 2108c609719bSwdenk 2109c609719bSwdenk- Configuration Management: 2110c609719bSwdenk CONFIG_IDENT_STRING 2111c609719bSwdenk 2112c609719bSwdenk If defined, this string will be added to the U-Boot 2113c609719bSwdenk version information (U_BOOT_VERSION) 2114c609719bSwdenk 2115c609719bSwdenk- Vendor Parameter Protection: 2116c609719bSwdenk 2117c609719bSwdenk U-Boot considers the values of the environment 2118c609719bSwdenk variables "serial#" (Board Serial Number) and 21197152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2120c609719bSwdenk are set once by the board vendor / manufacturer, and 2121c609719bSwdenk protects these variables from casual modification by 2122c609719bSwdenk the user. Once set, these variables are read-only, 2123c609719bSwdenk and write or delete attempts are rejected. You can 212411ccc33fSMarcel Ziswiler change this behaviour: 2125c609719bSwdenk 2126c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2127c609719bSwdenk file, the write protection for vendor parameters is 212847cd00faSwdenk completely disabled. Anybody can change or delete 2129c609719bSwdenk these parameters. 2130c609719bSwdenk 2131c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2132c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 213311ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2134c609719bSwdenk which can be changed exactly ONCE by the user. [The 2135c609719bSwdenk serial# is unaffected by this, i. e. it remains 2136c609719bSwdenk read-only.] 2137c609719bSwdenk 2138c609719bSwdenk- Protected RAM: 2139c609719bSwdenk CONFIG_PRAM 2140c609719bSwdenk 2141c609719bSwdenk Define this variable to enable the reservation of 2142c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2143c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2144c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2145c609719bSwdenk this default value by defining an environment 2146c609719bSwdenk variable "pram" to the number of kB you want to 2147c609719bSwdenk reserve. Note that the board info structure will 2148c609719bSwdenk still show the full amount of RAM. If pRAM is 2149c609719bSwdenk reserved, a new environment variable "mem" will 2150c609719bSwdenk automatically be defined to hold the amount of 2151c609719bSwdenk remaining RAM in a form that can be passed as boot 2152c609719bSwdenk argument to Linux, for instance like that: 2153c609719bSwdenk 2154fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2155c609719bSwdenk saveenv 2156c609719bSwdenk 2157c609719bSwdenk This way you can tell Linux not to use this memory, 2158c609719bSwdenk either, which results in a memory region that will 2159c609719bSwdenk not be affected by reboots. 2160c609719bSwdenk 2161c609719bSwdenk *WARNING* If your board configuration uses automatic 2162c609719bSwdenk detection of the RAM size, you must make sure that 2163c609719bSwdenk this memory test is non-destructive. So far, the 2164c609719bSwdenk following board configurations are known to be 2165c609719bSwdenk "pRAM-clean": 2166c609719bSwdenk 2167c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 2168c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 2169544d97e9SWolfgang Denk FLAGADM, TQM8260 2170c609719bSwdenk 2171c609719bSwdenk- Error Recovery: 2172c609719bSwdenk CONFIG_PANIC_HANG 2173c609719bSwdenk 2174c609719bSwdenk Define this variable to stop the system in case of a 2175c609719bSwdenk fatal error, so that you have to reset it manually. 2176c609719bSwdenk This is probably NOT a good idea for an embedded 217711ccc33fSMarcel Ziswiler system where you want the system to reboot 2178c609719bSwdenk automatically as fast as possible, but it may be 2179c609719bSwdenk useful during development since you can try to debug 2180c609719bSwdenk the conditions that lead to the situation. 2181c609719bSwdenk 2182c609719bSwdenk CONFIG_NET_RETRY_COUNT 2183c609719bSwdenk 2184c609719bSwdenk This variable defines the number of retries for 2185c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2186c609719bSwdenk before giving up the operation. If not defined, a 2187c609719bSwdenk default value of 5 is used. 2188c609719bSwdenk 218940cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 219040cb90eeSGuennadi Liakhovetski 219140cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 219240cb90eeSGuennadi Liakhovetski 219348a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 219448a3e999STetsuyuki Kobayashi 219548a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 219648a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 219748a3e999STetsuyuki Kobayashi try longer timeout such as 219848a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 219948a3e999STetsuyuki Kobayashi 2200c609719bSwdenk- Command Interpreter: 22018078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 220204a85b3bSwdenk 220304a85b3bSwdenk Enable auto completion of commands using TAB. 220404a85b3bSwdenk 22058078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 22068078f1a5SWolfgang Denk for the "hush" shell. 22078078f1a5SWolfgang Denk 22088078f1a5SWolfgang Denk 22096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2210c609719bSwdenk 2211c609719bSwdenk Define this variable to enable the "hush" shell (from 2212c609719bSwdenk Busybox) as command line interpreter, thus enabling 2213c609719bSwdenk powerful command line syntax like 2214c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2215c609719bSwdenk constructs ("shell scripts"). 2216c609719bSwdenk 2217c609719bSwdenk If undefined, you get the old, much simpler behaviour 2218c609719bSwdenk with a somewhat smaller memory footprint. 2219c609719bSwdenk 2220c609719bSwdenk 22216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2222c609719bSwdenk 2223c609719bSwdenk This defines the secondary prompt string, which is 2224c609719bSwdenk printed when the command interpreter needs more input 2225c609719bSwdenk to complete a command. Usually "> ". 2226c609719bSwdenk 2227c609719bSwdenk Note: 2228c609719bSwdenk 2229c609719bSwdenk In the current implementation, the local variables 2230c609719bSwdenk space and global environment variables space are 2231c609719bSwdenk separated. Local variables are those you define by 22323b57fe0aSwdenk simply typing `name=value'. To access a local 2233c609719bSwdenk variable later on, you have write `$name' or 22343b57fe0aSwdenk `${name}'; to execute the contents of a variable 22353b57fe0aSwdenk directly type `$name' at the command prompt. 2236c609719bSwdenk 2237c609719bSwdenk Global environment variables are those you use 2238c609719bSwdenk setenv/printenv to work with. To run a command stored 2239c609719bSwdenk in such a variable, you need to use the run command, 2240c609719bSwdenk and you must not use the '$' sign to access them. 2241c609719bSwdenk 2242c609719bSwdenk To store commands and special characters in a 2243c609719bSwdenk variable, please use double quotation marks 2244c609719bSwdenk surrounding the whole text of the variable, instead 2245c609719bSwdenk of the backslashes before semicolons and special 2246c609719bSwdenk symbols. 2247c609719bSwdenk 2248aa0c71acSWolfgang Denk- Commandline Editing and History: 2249aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2250aa0c71acSWolfgang Denk 225111ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2252aa0c71acSWolfgang Denk commandline input operations 2253aa0c71acSWolfgang Denk 2254a8c7c708Swdenk- Default Environment: 2255c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2256c609719bSwdenk 2257c609719bSwdenk Define this to contain any number of null terminated 2258c609719bSwdenk strings (variable = value pairs) that will be part of 22597152b1d0Swdenk the default environment compiled into the boot image. 22602262cfeeSwdenk 2261c609719bSwdenk For example, place something like this in your 2262c609719bSwdenk board's config file: 2263c609719bSwdenk 2264c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2265c609719bSwdenk "myvar1=value1\0" \ 2266c609719bSwdenk "myvar2=value2\0" 2267c609719bSwdenk 2268c609719bSwdenk Warning: This method is based on knowledge about the 2269c609719bSwdenk internal format how the environment is stored by the 22702262cfeeSwdenk U-Boot code. This is NOT an official, exported 2271c609719bSwdenk interface! Although it is unlikely that this format 22727152b1d0Swdenk will change soon, there is no guarantee either. 2273c609719bSwdenk You better know what you are doing here. 2274c609719bSwdenk 2275c609719bSwdenk Note: overly (ab)use of the default environment is 2276c609719bSwdenk discouraged. Make sure to check other ways to preset 227774de7aefSWolfgang Denk the environment like the "source" command or the 2278c609719bSwdenk boot command first. 2279c609719bSwdenk 22805e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 22815e724ca2SStephen Warren 22825e724ca2SStephen Warren Define this in order to add variables describing the 22835e724ca2SStephen Warren U-Boot build configuration to the default environment. 22845e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 22855e724ca2SStephen Warren 22865e724ca2SStephen Warren Enabling this option will cause the following to be defined: 22875e724ca2SStephen Warren 22885e724ca2SStephen Warren - CONFIG_SYS_ARCH 22895e724ca2SStephen Warren - CONFIG_SYS_CPU 22905e724ca2SStephen Warren - CONFIG_SYS_BOARD 22915e724ca2SStephen Warren - CONFIG_SYS_VENDOR 22925e724ca2SStephen Warren - CONFIG_SYS_SOC 22935e724ca2SStephen Warren 2294a8c7c708Swdenk- DataFlash Support: 22952abbe075Swdenk CONFIG_HAS_DATAFLASH 22962abbe075Swdenk 22972abbe075Swdenk Defining this option enables DataFlash features and 22982abbe075Swdenk allows to read/write in Dataflash via the standard 22992abbe075Swdenk commands cp, md... 23002abbe075Swdenk 2301f61ec45eSEric Nelson- Serial Flash support 2302f61ec45eSEric Nelson CONFIG_CMD_SF 2303f61ec45eSEric Nelson 2304f61ec45eSEric Nelson Defining this option enables SPI flash commands 2305f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2306f61ec45eSEric Nelson 2307f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2308f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2309f61ec45eSEric Nelson commands. 2310f61ec45eSEric Nelson 2311f61ec45eSEric Nelson The following defaults may be provided by the platform 2312f61ec45eSEric Nelson to handle the common case when only a single serial 2313f61ec45eSEric Nelson flash is present on the system. 2314f61ec45eSEric Nelson 2315f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2316f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2317f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2318f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2319f61ec45eSEric Nelson 23203f85ce27Swdenk- SystemACE Support: 23213f85ce27Swdenk CONFIG_SYSTEMACE 23223f85ce27Swdenk 23233f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 23243f85ce27Swdenk chips attached via some sort of local bus. The address 232511ccc33fSMarcel Ziswiler of the chip must also be defined in the 23266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 23273f85ce27Swdenk 23283f85ce27Swdenk #define CONFIG_SYSTEMACE 23296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 23303f85ce27Swdenk 23313f85ce27Swdenk When SystemACE support is added, the "ace" device type 23323f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 23333f85ce27Swdenk 2334ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2335ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2336ecb0ccd9SWolfgang Denk 233728cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2338ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 233928cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2340ecb0ccd9SWolfgang Denk number generator is used. 2341ecb0ccd9SWolfgang Denk 234228cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 234328cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 234428cb9375SWolfgang Denk defined, the normal port 69 is used. 234528cb9375SWolfgang Denk 234628cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2347ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2348ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2349ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2350ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2351ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2352ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2353ecb0ccd9SWolfgang Denk 2354a8c7c708Swdenk- Show boot progress: 2355c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2356c609719bSwdenk 2357c609719bSwdenk Defining this option allows to add some board- 2358c609719bSwdenk specific code (calling a user-provided function 2359c609719bSwdenk "show_boot_progress(int)") that enables you to show 2360c609719bSwdenk the system's boot progress on some display (for 2361c609719bSwdenk example, some LED's) on your board. At the moment, 2362c609719bSwdenk the following checkpoints are implemented: 2363c609719bSwdenk 23643a608ca0SSimon Glass- Detailed boot stage timing 23653a608ca0SSimon Glass CONFIG_BOOTSTAGE 23663a608ca0SSimon Glass Define this option to get detailed timing of each stage 23673a608ca0SSimon Glass of the boot process. 23683a608ca0SSimon Glass 23693a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 23703a608ca0SSimon Glass This is the number of available user bootstage records. 23713a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 23723a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 23733a608ca0SSimon Glass the limit, recording will stop. 23743a608ca0SSimon Glass 23753a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 23763a608ca0SSimon Glass Define this to print a report before boot, similar to this: 23773a608ca0SSimon Glass 23783a608ca0SSimon Glass Timer summary in microseconds: 23793a608ca0SSimon Glass Mark Elapsed Stage 23803a608ca0SSimon Glass 0 0 reset 23813a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 23823a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 23833a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 23843a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 23853a608ca0SSimon Glass 3,910,375 250,777 main_loop 23863a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 23873a608ca0SSimon Glass 30,361,327 445,160 start_kernel 23883a608ca0SSimon Glass 23891372cce2SMarian BalakowiczLegacy uImage format: 23901372cce2SMarian Balakowicz 2391c609719bSwdenk Arg Where When 2392c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2393c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2394c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2395c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2396c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2397c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2398c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2399c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2400c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 24011372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2402c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2403c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2404c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2405c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 24061372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2407c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 24081372cce2SMarian Balakowicz 24091372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 24101372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 24111372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 24121372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 24131372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 24141372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 24151372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 241611ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 24171372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 24181372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 24191372cce2SMarian Balakowicz 2420ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2421c609719bSwdenk 2422a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 242363e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 242463e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 242563e73c9aSwdenk 2426566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2427566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2428566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2429566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2430566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2431566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2432566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2433566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2434566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2435566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2436566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2437566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2438566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2439566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2440566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2441566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2442566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2443566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2444566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2445566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2446566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2447566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2448566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2449566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2450566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2451566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2452566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2453566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2454566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2455566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2456566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2457566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2458566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2459566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2460566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2461566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2462566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2463566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2464566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2465566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2466566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2467566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2468566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2469566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2470566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2471566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2472566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2473c609719bSwdenk 2474566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2475c609719bSwdenk 2476566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2477566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2478566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2479206c60cbSwdenk 2480566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2481566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 248211ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2483566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2484566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2485566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 248674de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 248774de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2488566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2489c609719bSwdenk 24901372cce2SMarian BalakowiczFIT uImage format: 24911372cce2SMarian Balakowicz 24921372cce2SMarian Balakowicz Arg Where When 24931372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 24941372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 24951372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 24961372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 24971372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 24981372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2499f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 25001372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 25011372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 25021372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 25031372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 25041372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 250511ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 250611ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 25071372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 25081372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 25091372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 25101372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 25111372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 25121372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 25131372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 25141372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 25151372cce2SMarian Balakowicz 25161372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 25171372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 25181372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 251911ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 25201372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 25211372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 25221372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 25231372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 25241372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 25251372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 25261372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 25271372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 25281372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 25291372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 25301372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 25311372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 25321372cce2SMarian Balakowicz 253311ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 25341372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 25351372cce2SMarian Balakowicz 253611ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 25371372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 25381372cce2SMarian Balakowicz 253911ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 25401372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 25411372cce2SMarian Balakowicz 25424cf2609bSWolfgang Denk- Standalone program support: 25434cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 25444cf2609bSWolfgang Denk 25456feff899SWolfgang Denk This option defines a board specific value for the 25466feff899SWolfgang Denk address where standalone program gets loaded, thus 25476feff899SWolfgang Denk overwriting the architecture dependent default 25484cf2609bSWolfgang Denk settings. 25494cf2609bSWolfgang Denk 25504cf2609bSWolfgang Denk- Frame Buffer Address: 25514cf2609bSWolfgang Denk CONFIG_FB_ADDR 25524cf2609bSWolfgang Denk 25534cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 25544cf2609bSWolfgang Denk address for frame buffer. 25554cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 25564cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 25576feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 25584cf2609bSWolfgang Denk 25594cf2609bSWolfgang Denk Please see board_init_f function. 25604cf2609bSWolfgang Denk 2561cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2562cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2563cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2564cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2565cccfc2abSDetlev Zundel 2566cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2567cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2568cccfc2abSDetlev Zundel 2569cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2570cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2571cccfc2abSDetlev Zundel 2572cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2573cccfc2abSDetlev Zundel Needed for mtdparts command support. 2574cccfc2abSDetlev Zundel 2575cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2576cccfc2abSDetlev Zundel 2577cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2578cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2579cccfc2abSDetlev Zundel 25806a11cf48SDaniel Schwierzeck- SPL framework 25816a11cf48SDaniel Schwierzeck CONFIG_SPL 25826a11cf48SDaniel Schwierzeck Enable building of SPL globally. 25836a11cf48SDaniel Schwierzeck 258495579793STom Rini CONFIG_SPL_LDSCRIPT 258595579793STom Rini LDSCRIPT for linking the SPL binary. 258695579793STom Rini 258795579793STom Rini CONFIG_SPL_MAX_SIZE 258895579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 258995579793STom Rini 25906a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 25916a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 25926a11cf48SDaniel Schwierzeck 259395579793STom Rini CONFIG_SPL_BSS_START_ADDR 259495579793STom Rini Link address for the BSS within the SPL binary. 259595579793STom Rini 259695579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 259795579793STom Rini Maximum binary size of the BSS section of the SPL binary. 259895579793STom Rini 259995579793STom Rini CONFIG_SPL_STACK 260095579793STom Rini Adress of the start of the stack SPL will use 260195579793STom Rini 260295579793STom Rini CONFIG_SYS_SPL_MALLOC_START 260395579793STom Rini Starting address of the malloc pool used in SPL. 260495579793STom Rini 260595579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 260695579793STom Rini The size of the malloc pool used in SPL. 26076a11cf48SDaniel Schwierzeck 260847f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 260947f7bcaeSTom Rini Enable the SPL framework under common/. This framework 261047f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 261147f7bcaeSTom Rini NAND loading of the Linux Kernel. 261247f7bcaeSTom Rini 2613861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 2614861a86f4STom Rini For ARM, enable an optional function to print more information 2615861a86f4STom Rini about the running system. 2616861a86f4STom Rini 26176a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 26186a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 26196a11cf48SDaniel Schwierzeck 26206a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 26216a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 26226a11cf48SDaniel Schwierzeck 26236a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 26246a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 26256a11cf48SDaniel Schwierzeck 26266a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 26276a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 26286a11cf48SDaniel Schwierzeck 26296a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 26306a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 26316a11cf48SDaniel Schwierzeck 263295579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 263395579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 263495579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 263595579793STom Rini Address, size and partition on the MMC to load U-Boot from 263695579793STom Rini when the MMC is being used in raw mode. 263795579793STom Rini 263895579793STom Rini CONFIG_SPL_FAT_SUPPORT 263995579793STom Rini Support for fs/fat/libfat.o in SPL binary 264095579793STom Rini 264195579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 264295579793STom Rini Filename to read to load U-Boot when reading from FAT 264395579793STom Rini 264495579793STom Rini CONFIG_SPL_NAND_SIMPLE 264595579793STom Rini Support for drivers/mtd/nand/libnand.o in SPL binary 264695579793STom Rini 264795579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 264895579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 264995579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 265095579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 265195579793STom Rini CONFIG_SYS_NAND_ECCBYTES 265295579793STom Rini Defines the size and behavior of the NAND that SPL uses 265395579793STom Rini to read U-Boot with CONFIG_SPL_NAND_SIMPLE 265495579793STom Rini 265595579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 265695579793STom Rini Location in NAND for CONFIG_SPL_NAND_SIMPLE to read U-Boot 265795579793STom Rini from. 265895579793STom Rini 265995579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 266095579793STom Rini Location in memory for CONFIG_SPL_NAND_SIMPLE to load U-Boot 266195579793STom Rini to. 266295579793STom Rini 266395579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 266495579793STom Rini Define this if you need to first read the OOB and then the 266595579793STom Rini data. This is used for example on davinci plattforms. 266695579793STom Rini 266795579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 266895579793STom Rini Support for an OMAP3-specific set of functions to return the 266995579793STom Rini ID and MFR of the first attached NAND chip, if present. 267095579793STom Rini 26716a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 26726a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 26736a11cf48SDaniel Schwierzeck 26746a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 26756a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 26766a11cf48SDaniel Schwierzeck 26776a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 26786a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 26796a11cf48SDaniel Schwierzeck 2680c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 2681c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 2682c57b953dSPavel Machek 26836a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 26846a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 26851372cce2SMarian Balakowicz 2686c609719bSwdenkModem Support: 2687c609719bSwdenk-------------- 2688c609719bSwdenk 2689566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2690c609719bSwdenk 269111ccc33fSMarcel Ziswiler- Modem support enable: 2692c609719bSwdenk CONFIG_MODEM_SUPPORT 2693c609719bSwdenk 2694c609719bSwdenk- RTS/CTS Flow control enable: 2695c609719bSwdenk CONFIG_HWFLOW 2696c609719bSwdenk 2697c609719bSwdenk- Modem debug support: 2698c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2699c609719bSwdenk 2700c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2701c609719bSwdenk for modem support. Useful only with BDI2000. 2702c609719bSwdenk 2703a8c7c708Swdenk- Interrupt support (PPC): 2704a8c7c708Swdenk 2705a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2706a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 270711ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2708a8c7c708Swdenk should set decrementer_count to appropriate value. If 270911ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2710a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 271111ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2712a8c7c708Swdenk specific handling. If board has watchdog / status_led 2713a8c7c708Swdenk / other_activity_monitor it works automatically from 2714a8c7c708Swdenk general timer_interrupt(). 2715a8c7c708Swdenk 2716c609719bSwdenk- General: 2717c609719bSwdenk 2718c609719bSwdenk In the target system modem support is enabled when a 2719c609719bSwdenk specific key (key combination) is pressed during 2720c609719bSwdenk power-on. Otherwise U-Boot will boot normally 272111ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2722c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2723c609719bSwdenk function, returning 1 and thus enabling modem 2724c609719bSwdenk initialization. 2725c609719bSwdenk 2726c609719bSwdenk If there are no modem init strings in the 2727c609719bSwdenk environment, U-Boot proceed to autoboot; the 2728c609719bSwdenk previous output (banner, info printfs) will be 272911ccc33fSMarcel Ziswiler suppressed, though. 2730c609719bSwdenk 2731c609719bSwdenk See also: doc/README.Modem 2732c609719bSwdenk 27339660e442SHelmut RaigerBoard initialization settings: 27349660e442SHelmut Raiger------------------------------ 27359660e442SHelmut Raiger 27369660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 27379660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 27389660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 27399660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 27409660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 27419660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 27429660e442SHelmut Raiger 27439660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 27449660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 27459660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 27469660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2747c609719bSwdenk 2748c609719bSwdenkConfiguration Settings: 2749c609719bSwdenk----------------------- 2750c609719bSwdenk 27516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2752c609719bSwdenk undefine this when you're short of memory. 2753c609719bSwdenk 27542fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 27552fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 27562fb2604dSPeter Tyser 27576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2758c609719bSwdenk prompt for user input. 2759c609719bSwdenk 27606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2761c609719bSwdenk 27626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2763c609719bSwdenk 27646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2765c609719bSwdenk 27666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2767c609719bSwdenk the application (usually a Linux kernel) when it is 2768c609719bSwdenk booted 2769c609719bSwdenk 27706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2771c609719bSwdenk List of legal baudrate settings for this board. 2772c609719bSwdenk 27736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2774c609719bSwdenk Suppress display of console information at boot. 2775c609719bSwdenk 27766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2777c609719bSwdenk If the board specific function 2778c609719bSwdenk extern int overwrite_console (void); 2779c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2780c609719bSwdenk serial port, else the settings in the environment are used. 2781c609719bSwdenk 27826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2783c609719bSwdenk Enable the call to overwrite_console(). 2784c609719bSwdenk 27856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2786c609719bSwdenk Enable overwrite of previous console environment settings. 2787c609719bSwdenk 27886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2789c609719bSwdenk Begin and End addresses of the area used by the 2790c609719bSwdenk simple memory test. 2791c609719bSwdenk 27926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2793c609719bSwdenk Enable an alternate, more extensive memory test. 2794c609719bSwdenk 27956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 27965f535fe1Swdenk Scratch address used by the alternate memory test 27975f535fe1Swdenk You only need to set this if address zero isn't writeable 27985f535fe1Swdenk 27996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 28006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 280114f73ca6SStefan Roese this specified memory area will get subtracted from the top 280211ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 280314f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 280414f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 280514f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 28065e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 280714f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 28085e12e75dSStefan Roese will have to get fixed in Linux additionally. 280914f73ca6SStefan Roese 281014f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 281114f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 281214f73ca6SStefan Roese be touched. 281314f73ca6SStefan Roese 281414f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 281514f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 281614f73ca6SStefan Roese then the end address of the Linux memory will be located at a 281714f73ca6SStefan Roese non page size aligned address and this could cause major 281814f73ca6SStefan Roese problems. 281914f73ca6SStefan Roese 28206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2821c609719bSwdenk Default load address for network file downloads 2822c609719bSwdenk 28236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2824c609719bSwdenk Enable temporary baudrate change while serial download 2825c609719bSwdenk 28266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2827c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2828c609719bSwdenk 28296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2830c609719bSwdenk Physical start address of Motherboard I/O (if using a 2831c609719bSwdenk Cogent motherboard) 2832c609719bSwdenk 28336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2834c609719bSwdenk Physical start address of Flash memory. 2835c609719bSwdenk 28366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2837c609719bSwdenk Physical start address of boot monitor code (set by 2838c609719bSwdenk make config files to be same as the text base address 283914d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 28406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2841c609719bSwdenk 28426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 28433b57fe0aSwdenk Size of memory reserved for monitor code, used to 28443b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 28453b57fe0aSwdenk embedded within the U-Boot image, or in a separate 28463b57fe0aSwdenk flash sector. 2847c609719bSwdenk 28486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2849c609719bSwdenk Size of DRAM reserved for malloc() use. 2850c609719bSwdenk 28516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 285215940c9aSStefan Roese Normally compressed uImages are limited to an 285315940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 28546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 285515940c9aSStefan Roese to adjust this setting to your needs. 2856c609719bSwdenk 28576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2858c609719bSwdenk Maximum size of memory mapped by the startup code of 2859c609719bSwdenk the Linux kernel; all data that must be processed by 28607d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 28617d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 28627d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 28637d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2864c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2865c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2866c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2867c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2868c609719bSwdenk 2869fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2870fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2871fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2872fca43cc8SJohn Rigby is enabled. 2873fca43cc8SJohn Rigby 2874fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2875fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2876fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2877fca43cc8SJohn Rigby 2878fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2879fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2880fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2881fca43cc8SJohn Rigby 28826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2883c609719bSwdenk Max number of Flash memory banks 2884c609719bSwdenk 28856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2886c609719bSwdenk Max number of sectors on a Flash chip 2887c609719bSwdenk 28886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2889c609719bSwdenk Timeout for Flash erase operations (in ms) 2890c609719bSwdenk 28916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2892c609719bSwdenk Timeout for Flash write operations (in ms) 2893c609719bSwdenk 28946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 28958564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 28968564acf9Swdenk 28976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 28988564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 28998564acf9Swdenk 29006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 29018564acf9Swdenk If defined, hardware flash sectors protection is used 29028564acf9Swdenk instead of U-Boot software protection. 29038564acf9Swdenk 29046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2905c609719bSwdenk 2906c609719bSwdenk Enable TFTP transfers directly to flash memory; 2907c609719bSwdenk without this option such a download has to be 2908c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2909c609719bSwdenk copy from RAM to flash. 2910c609719bSwdenk 2911c609719bSwdenk The two-step approach is usually more reliable, since 2912c609719bSwdenk you can check if the download worked before you erase 291311ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 291411ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2915c609719bSwdenk downloaded image) this option may be very useful. 2916c609719bSwdenk 29176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2918c609719bSwdenk Define if the flash driver uses extra elements in the 29195653fc33Swdenk common flash structure for storing flash geometry. 29205653fc33Swdenk 292100b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 29225653fc33Swdenk This option also enables the building of the cfi_flash driver 29235653fc33Swdenk in the drivers directory 292453cf9435Sstroese 292591809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 292691809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 292791809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 292891809ed5SPiotr Ziecik to the MTD layer. 292991809ed5SPiotr Ziecik 29306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 293196ef831fSGuennadi Liakhovetski Use buffered writes to flash. 293296ef831fSGuennadi Liakhovetski 293396ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 293496ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 293596ef831fSGuennadi Liakhovetski write commands. 293696ef831fSGuennadi Liakhovetski 29376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 29385568e613SStefan Roese If this option is defined, the common CFI flash doesn't 29395568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 29405568e613SStefan Roese is useful, if some of the configured banks are only 29415568e613SStefan Roese optionally available. 29425568e613SStefan Roese 29439a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 29449a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 29459a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 29469a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 29479a042e9cSJerry Van Baren 29486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 294911ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 295011ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 295153cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 295253cf9435Sstroese buffers can be full shortly after enabling the interface 295311ccc33fSMarcel Ziswiler on high Ethernet traffic. 295453cf9435Sstroese Defaults to 4 if not defined. 2955c609719bSwdenk 2956ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2957ea882bafSWolfgang Denk 2958ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2959ea882bafSWolfgang Denk internally to store the environment settings. The default 2960ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2961ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2962ea882bafSWolfgang Denk lib/hashtable.c for details. 2963ea882bafSWolfgang Denk 2964c609719bSwdenkThe following definitions that deal with the placement and management 2965c609719bSwdenkof environment data (variable area); in general, we support the 2966c609719bSwdenkfollowing configurations: 2967c609719bSwdenk 2968c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2969c3eb3fe4SMike Frysinger 2970c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2971c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2972c3eb3fe4SMike Frysinger 29735a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2974c609719bSwdenk 2975c609719bSwdenk Define this if the environment is in flash memory. 2976c609719bSwdenk 2977c609719bSwdenk a) The environment occupies one whole flash sector, which is 2978c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2979c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2980c609719bSwdenk sector" type flash chips, which have several smaller 2981c609719bSwdenk sectors at the start or the end. For instance, such a 2982c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2983c609719bSwdenk such a case you would place the environment in one of the 2984c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2985c609719bSwdenk "top boot sector" type flash chips, you would put the 2986c609719bSwdenk environment in one of the last sectors, leaving a gap 2987c609719bSwdenk between U-Boot and the environment. 2988c609719bSwdenk 29890e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2990c609719bSwdenk 2991c609719bSwdenk Offset of environment data (variable area) to the 2992c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2993c609719bSwdenk type flash chips the second sector can be used: the offset 2994c609719bSwdenk for this sector is given here. 2995c609719bSwdenk 29966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2997c609719bSwdenk 29980e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2999c609719bSwdenk 3000c609719bSwdenk This is just another way to specify the start address of 3001c609719bSwdenk the flash sector containing the environment (instead of 30020e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3003c609719bSwdenk 30040e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3005c609719bSwdenk 3006c609719bSwdenk Size of the sector containing the environment. 3007c609719bSwdenk 3008c609719bSwdenk 3009c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3010c609719bSwdenk In such a case you don't want to spend a whole sector for 3011c609719bSwdenk the environment. 3012c609719bSwdenk 30130e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3014c609719bSwdenk 30155a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 30160e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3017c609719bSwdenk of this flash sector for the environment. This saves 3018c609719bSwdenk memory for the RAM copy of the environment. 3019c609719bSwdenk 3020c609719bSwdenk It may also save flash memory if you decide to use this 3021c609719bSwdenk when your environment is "embedded" within U-Boot code, 3022c609719bSwdenk since then the remainder of the flash sector could be used 3023c609719bSwdenk for U-Boot code. It should be pointed out that this is 3024c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3025c609719bSwdenk updating the environment in flash makes it always 3026c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3027c609719bSwdenk wrong before the contents has been restored from a copy in 3028c609719bSwdenk RAM, your target system will be dead. 3029c609719bSwdenk 30300e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 30310e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3032c609719bSwdenk 3033c609719bSwdenk These settings describe a second storage area used to hold 303411ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 30353e38691eSwdenk a valid backup copy in case there is a power failure during 3036c609719bSwdenk a "saveenv" operation. 3037c609719bSwdenk 3038c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3039c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3040c609719bSwdenkaccordingly! 3041c609719bSwdenk 3042c609719bSwdenk 30439314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3044c609719bSwdenk 3045c609719bSwdenk Define this if you have some non-volatile memory device 3046c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3047c609719bSwdenk environment. 3048c609719bSwdenk 30490e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 30500e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3051c609719bSwdenk 305211ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3053c609719bSwdenk want to use for environment. It is assumed that this memory 3054c609719bSwdenk can just be read and written to, without any special 3055c609719bSwdenk provision. 3056c609719bSwdenk 3057c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3058c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 305911ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3060c609719bSwdenkU-Boot will hang. 3061c609719bSwdenk 3062c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3063c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3064c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3065c609719bSwdenkto save the current settings. 3066c609719bSwdenk 3067c609719bSwdenk 3068bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3069c609719bSwdenk 3070c609719bSwdenk Use this if you have an EEPROM or similar serial access 3071c609719bSwdenk device and a driver for it. 3072c609719bSwdenk 30730e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 30740e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3075c609719bSwdenk 3076c609719bSwdenk These two #defines specify the offset and size of the 3077c609719bSwdenk environment area within the total memory of your EEPROM. 3078c609719bSwdenk 30796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3080c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3081c609719bSwdenk The default address is zero. 3082c609719bSwdenk 30836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3084c609719bSwdenk If defined, the number of bits used to address bytes in a 3085c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3086c609719bSwdenk would require six bits. 3087c609719bSwdenk 30886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3089c609719bSwdenk If defined, the number of milliseconds to delay between 3090c609719bSwdenk page writes. The default is zero milliseconds. 3091c609719bSwdenk 30926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3093c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3094c609719bSwdenk that this is NOT the chip address length! 3095c609719bSwdenk 30966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 30975cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 30985cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 30995cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 31005cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 31015cf91d6bSwdenk byte chips. 31025cf91d6bSwdenk 31035cf91d6bSwdenk Note that we consider the length of the address field to 31045cf91d6bSwdenk still be one byte because the extra address bits are hidden 31055cf91d6bSwdenk in the chip address. 31065cf91d6bSwdenk 31076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3108c609719bSwdenk The size in bytes of the EEPROM device. 3109c609719bSwdenk 3110548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3111548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3112548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3113548738b4SHeiko Schocher 3114548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3115548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3116548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3117548738b4SHeiko Schocher EEPROM. For example: 3118548738b4SHeiko Schocher 3119548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3120548738b4SHeiko Schocher 3121548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3122548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3123c609719bSwdenk 3124057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 31255779d8d9Swdenk 31265779d8d9Swdenk Define this if you have a DataFlash memory device which you 31275779d8d9Swdenk want to use for the environment. 31285779d8d9Swdenk 31290e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 31300e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 31310e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 31325779d8d9Swdenk 31335779d8d9Swdenk These three #defines specify the offset and size of the 31345779d8d9Swdenk environment area within the total memory of your DataFlash placed 31355779d8d9Swdenk at the specified address. 31365779d8d9Swdenk 31370a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 31380a85a9e7SLiu Gang 31390a85a9e7SLiu Gang Define this if you have a remote memory space which you 31400a85a9e7SLiu Gang want to use for the local device's environment. 31410a85a9e7SLiu Gang 31420a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 31430a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 31440a85a9e7SLiu Gang 31450a85a9e7SLiu Gang These two #defines specify the address and size of the 31460a85a9e7SLiu Gang environment area within the remote memory space. The 31470a85a9e7SLiu Gang local device can get the environment from remote memory 3148fc54c7faSLiu Gang space by SRIO or PCIE links. 31490a85a9e7SLiu Gang 31500a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 31510a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3152fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3153fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 31540a85a9e7SLiu Gang 315551bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 315613a5695bSwdenk 315713a5695bSwdenk Define this if you have a NAND device which you want to use 315813a5695bSwdenk for the environment. 315913a5695bSwdenk 31600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 31610e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 316213a5695bSwdenk 316313a5695bSwdenk These two #defines specify the offset and size of the environment 3164fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3165fdd813deSScott Wood aligned to an erase block boundary. 31665779d8d9Swdenk 3167fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3168e443c944SMarkus Klotzbuecher 31690e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3170fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3171fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3172fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3173fdd813deSScott Wood aligned to an erase block boundary. 3174e443c944SMarkus Klotzbuecher 3175fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3176fdd813deSScott Wood 3177fdd813deSScott Wood Specifies the length of the region in which the environment 3178fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3179fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3180fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3181fdd813deSScott Wood the range to be avoided. 3182fdd813deSScott Wood 3183fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3184fdd813deSScott Wood 3185fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3186fdd813deSScott Wood environment from block zero's out-of-band data. The 3187fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3188fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3189fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3190e443c944SMarkus Klotzbuecher 3191b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3192b74ab737SGuennadi Liakhovetski 3193b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3194b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3195b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3196b74ab737SGuennadi Liakhovetski 31976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3198c609719bSwdenk 3199c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3200c609719bSwdenk area is used at an early stage (ROM part) if the environment 3201c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3202c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3203c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3204c609719bSwdenk to be a good choice since it makes it far enough from the 3205c609719bSwdenk start of the data area as well as from the stack pointer. 3206c609719bSwdenk 3207e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3208c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3209cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3210c609719bSwdenkuntil then to read environment variables. 3211c609719bSwdenk 321285ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 321385ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 321485ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 321585ec0bccSwdenknecessary, because the first environment variable we need is the 321685ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 321785ec0bccSwdenkhave any device yet where we could complain.] 3218c609719bSwdenk 3219c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3220c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 322185ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3222c609719bSwdenk 32236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3224fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3225fc3e2165Swdenk 32266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3227fc3e2165Swdenk also needs to be defined. 3228fc3e2165Swdenk 32296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3230fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3231c609719bSwdenk 3232f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3233f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3234f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3235f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3236f5675aa5SRon Madrid space for already greatly restricted images, including but not 3237f5675aa5SRon Madrid limited to NAND_SPL configurations. 3238f5675aa5SRon Madrid 3239c609719bSwdenkLow Level (hardware related) configuration options: 3240dc7c9a1aSwdenk--------------------------------------------------- 3241c609719bSwdenk 32426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3243c609719bSwdenk Cache Line Size of the CPU. 3244c609719bSwdenk 32456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3246c609719bSwdenk Default address of the IMMR after system reset. 32472535d602Swdenk 32482535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 32492535d602Swdenk and RPXsuper) to be able to adjust the position of 32502535d602Swdenk the IMMR register after a reset. 3251c609719bSwdenk 3252e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3253e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3254e46fedfeSTimur Tabi PowerPC SOCs. 3255e46fedfeSTimur Tabi 3256e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3257e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3258e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3259e46fedfeSTimur Tabi 3260e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3261e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3262e46fedfeSTimur Tabi 3263e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3264e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3265e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3266e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3267e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3268e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3269e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3270e46fedfeSTimur Tabi 3271e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3272e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3273e46fedfeSTimur Tabi 3274e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3275e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3276e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3277e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3278e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3279e46fedfeSTimur Tabi 3280e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3281e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3282e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3283e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3284e46fedfeSTimur Tabi 3285e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3286e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3287e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3288e46fedfeSTimur Tabi 32897f6c2cbcSwdenk- Floppy Disk Support: 32906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 32917f6c2cbcSwdenk 32927f6c2cbcSwdenk the default drive number (default value 0) 32937f6c2cbcSwdenk 32946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 32957f6c2cbcSwdenk 329611ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 32977f6c2cbcSwdenk (default value 1) 32987f6c2cbcSwdenk 32996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 33007f6c2cbcSwdenk 33017f6c2cbcSwdenk defines the offset of register from address. It 33027f6c2cbcSwdenk depends on which part of the data bus is connected to 330311ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 33047f6c2cbcSwdenk 33056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 33066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 33077f6c2cbcSwdenk default value. 33087f6c2cbcSwdenk 33096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 33107f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 33117f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 33127f6c2cbcSwdenk source code. It is used to make hardware dependant 33137f6c2cbcSwdenk initializations. 33147f6c2cbcSwdenk 33150abddf82SMacpaul Lin- CONFIG_IDE_AHB: 33160abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 33170abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 33180abddf82SMacpaul Lin When software is doing ATA command and data transfer to 33190abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 33200abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 33210abddf82SMacpaul Lin is requierd. 33220abddf82SMacpaul Lin 33236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 332425d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 332525d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3326c609719bSwdenk 33276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3328c609719bSwdenk 33297152b1d0Swdenk Start address of memory area that can be used for 3330c609719bSwdenk initial data and stack; please note that this must be 3331c609719bSwdenk writable memory that is working WITHOUT special 3332c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3333c609719bSwdenk will become available only after programming the 3334c609719bSwdenk memory controller and running certain initialization 3335c609719bSwdenk sequences. 3336c609719bSwdenk 3337c609719bSwdenk U-Boot uses the following memory types: 3338c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3339c609719bSwdenk - MPC824X: data cache 3340c609719bSwdenk - PPC4xx: data cache 3341c609719bSwdenk 33426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3343c609719bSwdenk 3344c609719bSwdenk Offset of the initial data structure in the memory 33456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 33466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3347c609719bSwdenk data is located at the end of the available space 3348553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 33496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 33506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 33516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3352c609719bSwdenk 3353c609719bSwdenk Note: 3354c609719bSwdenk On the MPC824X (or other systems that use the data 3355c609719bSwdenk cache for initial memory) the address chosen for 33566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3357c609719bSwdenk point to an otherwise UNUSED address space between 3358c609719bSwdenk the top of RAM and the start of the PCI space. 3359c609719bSwdenk 33606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3361c609719bSwdenk 33626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3363c609719bSwdenk 33646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3365c609719bSwdenk 33666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3367c609719bSwdenk 33686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3369c609719bSwdenk 33706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3371c609719bSwdenk 33726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3373c609719bSwdenk SDRAM timing 3374c609719bSwdenk 33756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3376c609719bSwdenk periodic timer for refresh 3377c609719bSwdenk 33786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3379c609719bSwdenk 33806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 33816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 33826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 33836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3384c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3385c609719bSwdenk 3386c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 33876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 33886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3389c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3390c609719bSwdenk 33916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 33926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3393c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3394c609719bSwdenk Prescaler definitions (SDRAM timing) 3395c609719bSwdenk 33966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3397c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3398c609719bSwdenk define relocation offset in DPRAM [DSP2] 3399c609719bSwdenk 34006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3401b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3402b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3403b423d055SHeiko Schocher 34046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3405c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3406c609719bSwdenk define relocation offset in DPRAM [SCC4] 3407c609719bSwdenk 34086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3409c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3410c609719bSwdenk wrong setting might damage your board. Read 3411c609719bSwdenk doc/README.MBX before setting this variable! 3412c609719bSwdenk 34136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3414ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3415ea909b76Swdenk (Power On Self Tests). This definition overrides 3416ea909b76Swdenk #define'd default value in commproc.h resp. 3417ea909b76Swdenk cpm_8260.h. 3418ea909b76Swdenk 34196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 34206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 34216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 34226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 34236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 34246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 34256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 34266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3427a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 34285d232d0eSwdenk 34299cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 34309cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 34319cacf4fcSDirk Eibach required. 34329cacf4fcSDirk Eibach 343369fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 343469fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 343569fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 343669fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 343769fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 343869fd2d3bSAndrew Sharp by coreboot or similar. 343969fd2d3bSAndrew Sharp 3440a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3441a09b9b68SKumar Gala Chip has SRIO or not 3442a09b9b68SKumar Gala 3443a09b9b68SKumar Gala- CONFIG_SRIO1: 3444a09b9b68SKumar Gala Board has SRIO 1 port available 3445a09b9b68SKumar Gala 3446a09b9b68SKumar Gala- CONFIG_SRIO2: 3447a09b9b68SKumar Gala Board has SRIO 2 port available 3448a09b9b68SKumar Gala 3449a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3450a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3451a09b9b68SKumar Gala 3452a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3453a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3454a09b9b68SKumar Gala 3455a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3456a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3457a09b9b68SKumar Gala 3458eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3459eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3460eced4626SAlex Waterman 16 bit bus. 3461eced4626SAlex Waterman 3462eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3463eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3464eced4626SAlex Waterman a default value will be used. 3465eced4626SAlex Waterman 3466bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3467218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3468218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3469218ca724SWolfgang Denk 3470bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3471bb99ad6dSBen Warren I2C address of the SPD EEPROM 3472bb99ad6dSBen Warren 34736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3474218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3475218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3476218ca724SWolfgang Denk to something your driver can deal with. 3477bb99ad6dSBen Warren 34781b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 34791b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 34801b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 34811b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 34821b3e3c4fSYork Sun header files or board specific files. 34831b3e3c4fSYork Sun 34846f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 34856f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 34866f5e1dc5SYork Sun 34876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3488218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3489218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 34902ad6b513STimur Tabi 3491c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3492c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3493c26e454dSwdenk 3494c26e454dSwdenk- CONFIG_FEC[12]_PHY 3495c26e454dSwdenk Define to the hardcoded PHY address which corresponds 34966e592385Swdenk to the given FEC; i. e. 3497c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3498c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3499c26e454dSwdenk 3500c26e454dSwdenk When set to -1, means to probe for first available. 3501c26e454dSwdenk 3502c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3503c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3504c26e454dSwdenk (so program the FEC to ignore it). 3505c26e454dSwdenk 3506c26e454dSwdenk- CONFIG_RMII 3507c26e454dSwdenk Enable RMII mode for all FECs. 3508c26e454dSwdenk Note that this is a global option, we can't 3509c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3510c26e454dSwdenk 35115cf91d6bSwdenk- CONFIG_CRC32_VERIFY 35125cf91d6bSwdenk Add a verify option to the crc32 command. 35135cf91d6bSwdenk The syntax is: 35145cf91d6bSwdenk 35155cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 35165cf91d6bSwdenk 35175cf91d6bSwdenk Where address/count indicate a memory area 35185cf91d6bSwdenk and crc32 is the correct crc32 which the 35195cf91d6bSwdenk area should have. 35205cf91d6bSwdenk 352156523f12Swdenk- CONFIG_LOOPW 352256523f12Swdenk Add the "loopw" memory command. This only takes effect if 3523602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 352456523f12Swdenk 35257b466641Sstroese- CONFIG_MX_CYCLIC 35267b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 35277b466641Sstroese "md/mw" commands. 35287b466641Sstroese Examples: 35297b466641Sstroese 35307b466641Sstroese => mdc.b 10 4 500 35317b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 35327b466641Sstroese 35337b466641Sstroese => mwc.l 100 12345678 10 35347b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 35357b466641Sstroese 35367b466641Sstroese This only takes effect if the memory commands are activated 3537602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 35387b466641Sstroese 35398aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3540afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3541e03f3169SWolfgang Denk low level initializations (like setting up the memory 3542e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3543e03f3169SWolfgang Denk relocate itself into RAM. 35448aa1a2d1Swdenk 3545e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3546e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3547e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3548e03f3169SWolfgang Denk these initializations itself. 35498aa1a2d1Swdenk 3550401bb30bSAneesh V- CONFIG_SPL_BUILD 3551df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3552df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3553df81238bSMagnus Lilja compiling a NAND SPL. 3554400558b5Swdenk 3555d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3556d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3557d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3558d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3559d8834a13SMatthias Weisser conditions but may increase the binary size. 3560d8834a13SMatthias Weisser 3561f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3562f2717b47STimur Tabi----------------------------------- 3563f2717b47STimur Tabi 3564f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3565f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3566f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3567f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3568f2717b47STimur Tabiwithin that device. 3569f2717b47STimur Tabi 3570f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3571f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3572f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3573f2717b47STimur Tabi is also specified. 3574f2717b47STimur Tabi 3575f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3576f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3577f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3578f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3579f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3580f2717b47STimur Tabi 3581f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3582f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3583f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3584f2717b47STimur Tabi virtual address in NOR flash. 3585f2717b47STimur Tabi 3586f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3587f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3588f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3589f2717b47STimur Tabi 3590f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3591f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3592f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3593f2717b47STimur Tabi 3594f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3595f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3596f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3597f2717b47STimur Tabi 3598292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3599292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3600292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3601fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3602fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3603fc54c7faSLiu Gang master's memory space. 3604f2717b47STimur Tabi 3605c609719bSwdenkBuilding the Software: 3606c609719bSwdenk====================== 3607c609719bSwdenk 3608218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3609218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3610218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3611218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3612218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3613218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3614c609719bSwdenk 3615218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3616218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3617218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3618218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3619218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3620c609719bSwdenk 3621218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3622218ca724SWolfgang Denk $ export CROSS_COMPILE 3623c609719bSwdenk 36242f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 36252f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 36262f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 36272f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 36282f8d396bSPeter Tyser 36292f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 36302f8d396bSPeter Tyser 36312f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 36322f8d396bSPeter Tyser be executed on computers running Windows. 36332f8d396bSPeter Tyser 3634c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3635c609719bSwdenksources you must configure U-Boot for one specific board type. This 3636c609719bSwdenkis done by typing: 3637c609719bSwdenk 3638c609719bSwdenk make NAME_config 3639c609719bSwdenk 3640218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 36414d675ae6SMichael Jonesrations; see boards.cfg for supported names. 364254387ac9Swdenk 3643c609719bSwdenkNote: for some board special configuration names may exist; check if 3644c609719bSwdenk additional information is available from the board vendor; for 36452729af9dSwdenk instance, the TQM823L systems are available without (standard) 36462729af9dSwdenk or with LCD support. You can select such additional "features" 364711ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3648c609719bSwdenk 36492729af9dSwdenk make TQM823L_config 36502729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3651c609719bSwdenk 3652c609719bSwdenk make TQM823L_LCD_config 3653c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3654c609719bSwdenk 3655c609719bSwdenk etc. 3656c609719bSwdenk 3657c609719bSwdenk 3658c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 36597152b1d0Swdenkimages ready for download to / installation on your system: 3660c609719bSwdenk 3661c609719bSwdenk- "u-boot.bin" is a raw binary image 3662c609719bSwdenk- "u-boot" is an image in ELF binary format 3663c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3664c609719bSwdenk 3665baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3666baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3667baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3668baf31249SMarian Balakowicz 3669baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3670baf31249SMarian Balakowicz 3671baf31249SMarian Balakowicz make O=/tmp/build distclean 3672baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3673baf31249SMarian Balakowicz make O=/tmp/build all 3674baf31249SMarian Balakowicz 3675baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3676baf31249SMarian Balakowicz 3677baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3678baf31249SMarian Balakowicz make distclean 3679baf31249SMarian Balakowicz make NAME_config 3680baf31249SMarian Balakowicz make all 3681baf31249SMarian Balakowicz 3682baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3683baf31249SMarian Balakowiczvariable. 3684baf31249SMarian Balakowicz 3685c609719bSwdenk 3686c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3687c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3688c609719bSwdenknative "make". 3689c609719bSwdenk 3690c609719bSwdenk 3691c609719bSwdenkIf the system board that you have is not listed, then you will need 3692c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3693c609719bSwdenksteps: 3694c609719bSwdenk 3695c609719bSwdenk1. Add a new configuration option for your board to the toplevel 36964d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 36974d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3698c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 369985ec0bccSwdenk files you need. In your board directory, you will need at least 370085ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 370185ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 370285ec0bccSwdenk your board 3703c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3704c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 370585ec0bccSwdenk4. Run "make <board>_config" with your new name. 3706c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3707c609719bSwdenk to be installed on your target system. 370885ec0bccSwdenk6. Debug and solve any problems that might arise. 3709c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3710c609719bSwdenk 3711c609719bSwdenk 3712c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3713c609719bSwdenk============================================================== 3714c609719bSwdenk 3715c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3716c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3717c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3718c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3719218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3720c609719bSwdenk 3721c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3722c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3723c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3724c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3725c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 37267152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3727218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3728218ca724SWolfgang Denkyou can type 3729c609719bSwdenk 3730c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3731c609719bSwdenk 3732c609719bSwdenkor to build on a native PowerPC system you can type 3733c609719bSwdenk 3734c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3735c609719bSwdenk 3736218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3737218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3738218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3739218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3740218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3741218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3742218ca724SWolfgang Denkvariable. For example: 3743baf31249SMarian Balakowicz 3744baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3745baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3746baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3747baf31249SMarian Balakowicz 3748218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3749218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3750218ca724SWolfgang Denkduring the whole build process. 3751baf31249SMarian Balakowicz 3752baf31249SMarian Balakowicz 3753c609719bSwdenkSee also "U-Boot Porting Guide" below. 3754c609719bSwdenk 3755c609719bSwdenk 3756c609719bSwdenkMonitor Commands - Overview: 3757c609719bSwdenk============================ 3758c609719bSwdenk 3759c609719bSwdenkgo - start application at address 'addr' 3760c609719bSwdenkrun - run commands in an environment variable 3761c609719bSwdenkbootm - boot application image from memory 3762c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 376344f074c7SMarek Vasutbootz - boot zImage from memory 3764c609719bSwdenktftpboot- boot image via network using TFTP protocol 3765c609719bSwdenk and env variables "ipaddr" and "serverip" 3766c609719bSwdenk (and eventually "gatewayip") 37671fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3768c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3769c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3770c609719bSwdenkloads - load S-Record file over serial line 3771c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3772c609719bSwdenkmd - memory display 3773c609719bSwdenkmm - memory modify (auto-incrementing) 3774c609719bSwdenknm - memory modify (constant address) 3775c609719bSwdenkmw - memory write (fill) 3776c609719bSwdenkcp - memory copy 3777c609719bSwdenkcmp - memory compare 3778c609719bSwdenkcrc32 - checksum calculation 37790f89c54bSPeter Tyseri2c - I2C sub-system 3780c609719bSwdenksspi - SPI utility commands 3781c609719bSwdenkbase - print or set address offset 3782c609719bSwdenkprintenv- print environment variables 3783c609719bSwdenksetenv - set environment variables 3784c609719bSwdenksaveenv - save environment variables to persistent storage 3785c609719bSwdenkprotect - enable or disable FLASH write protection 3786c609719bSwdenkerase - erase FLASH memory 3787c609719bSwdenkflinfo - print FLASH memory information 3788c609719bSwdenkbdinfo - print Board Info structure 3789c609719bSwdenkiminfo - print header information for application image 3790c609719bSwdenkconinfo - print console devices and informations 3791c609719bSwdenkide - IDE sub-system 3792c609719bSwdenkloop - infinite loop on address range 379356523f12Swdenkloopw - infinite write loop on address range 3794c609719bSwdenkmtest - simple RAM test 3795c609719bSwdenkicache - enable or disable instruction cache 3796c609719bSwdenkdcache - enable or disable data cache 3797c609719bSwdenkreset - Perform RESET of the CPU 3798c609719bSwdenkecho - echo args to console 3799c609719bSwdenkversion - print monitor version 3800c609719bSwdenkhelp - print online help 3801c609719bSwdenk? - alias for 'help' 3802c609719bSwdenk 3803c609719bSwdenk 3804c609719bSwdenkMonitor Commands - Detailed Description: 3805c609719bSwdenk======================================== 3806c609719bSwdenk 3807c609719bSwdenkTODO. 3808c609719bSwdenk 3809c609719bSwdenkFor now: just type "help <command>". 3810c609719bSwdenk 3811c609719bSwdenk 3812c609719bSwdenkEnvironment Variables: 3813c609719bSwdenk====================== 3814c609719bSwdenk 3815c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3816c609719bSwdenkcan be made persistent by saving to Flash memory. 3817c609719bSwdenk 3818c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3819c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3820c609719bSwdenkwithout a value can be used to delete a variable from the 3821c609719bSwdenkenvironment. As long as you don't save the environment you are 3822c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3823c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3824c609719bSwdenk 3825c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3826c96f86eeSWolfgang Denk 3827c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3828c609719bSwdenk 3829c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3830c609719bSwdenk 3831c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3832c609719bSwdenk 3833c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3834c609719bSwdenk 3835c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3836c609719bSwdenk 3837c609719bSwdenk bootfile - Name of the image to load with TFTP 3838c609719bSwdenk 38397d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 38407d721e34SBartlomiej Sieka command can be restricted. This variable is given as 38417d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 38427d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 38437d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 38447d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3845c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3846c3624e6eSGrant Likely bootm_mapsize. 3847c3624e6eSGrant Likely 3848c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3849c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3850c3624e6eSGrant Likely defines the size of the memory region starting at base 3851c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3852c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3853c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3854c3624e6eSGrant Likely used otherwise. 38557d721e34SBartlomiej Sieka 38567d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 38577d721e34SBartlomiej Sieka command can be restricted. This variable is given as 38587d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 38597d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 38607d721e34SBartlomiej Sieka environment variable. 38617d721e34SBartlomiej Sieka 38624bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 38634bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 38644bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 38654bae9090SBartlomiej Sieka 3866c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3867c609719bSwdenk "bootp" will just load perform a lookup of the 3868c609719bSwdenk configuration from the BOOTP server, but not try to 3869c609719bSwdenk load any image using TFTP 3870c609719bSwdenk 3871c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3872c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3873c609719bSwdenk be automatically started (by internally calling 3874c609719bSwdenk "bootm") 3875c609719bSwdenk 38764a6fd34bSwdenk If set to "no", a standalone image passed to the 38774a6fd34bSwdenk "bootm" command will be copied to the load address 38784a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 38794a6fd34bSwdenk This can be used to load and uncompress arbitrary 38804a6fd34bSwdenk data. 38814a6fd34bSwdenk 3882a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3883a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3884fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3885fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3886fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3887fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3888fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3889fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3890fa34f6b2SShawn Guo access it during the boot procedure. 3891fa34f6b2SShawn Guo 3892a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3893a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3894a28afca5SDavid A. Long to work it must reside in writable memory, have 3895a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3896a28afca5SDavid A. Long add the information it needs into it, and the memory 3897a28afca5SDavid A. Long must be accessible by the kernel. 3898a28afca5SDavid A. Long 3899eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3900eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3901eea63e05SSimon Glass defined. 3902eea63e05SSimon Glass 390317ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 390417ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 390517ea1177Swdenk mode (400kHZ). This environment variable is used in 390617ea1177Swdenk initialization code. So, for changes to be effective 390717ea1177Swdenk it must be saved and board must be reset. 390817ea1177Swdenk 3909c609719bSwdenk initrd_high - restrict positioning of initrd images: 3910c609719bSwdenk If this variable is not set, initrd images will be 3911c609719bSwdenk copied to the highest possible address in RAM; this 3912c609719bSwdenk is usually what you want since it allows for 3913c609719bSwdenk maximum initrd size. If for some reason you want to 3914c609719bSwdenk make sure that the initrd image is loaded below the 39156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3916c609719bSwdenk variable to a value of "no" or "off" or "0". 3917c609719bSwdenk Alternatively, you can set it to a maximum upper 3918c609719bSwdenk address to use (U-Boot will still check that it 3919c609719bSwdenk does not overwrite the U-Boot stack and data). 3920c609719bSwdenk 3921c609719bSwdenk For instance, when you have a system with 16 MB 39227152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3923c609719bSwdenk you can do this by adding "mem=12M" to the value of 3924c609719bSwdenk the "bootargs" variable. However, now you must make 39257152b1d0Swdenk sure that the initrd image is placed in the first 3926c609719bSwdenk 12 MB as well - this can be done with 3927c609719bSwdenk 3928c609719bSwdenk setenv initrd_high 00c00000 3929c609719bSwdenk 393038b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 393138b99261Swdenk indication to U-Boot that all addresses are legal 393238b99261Swdenk for the Linux kernel, including addresses in flash 393338b99261Swdenk memory. In this case U-Boot will NOT COPY the 393438b99261Swdenk ramdisk at all. This may be useful to reduce the 393538b99261Swdenk boot time on your system, but requires that this 393638b99261Swdenk feature is supported by your Linux kernel. 393738b99261Swdenk 3938c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3939c609719bSwdenk 3940c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3941dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3942c609719bSwdenk 3943c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3944c609719bSwdenk 3945c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3946c609719bSwdenk 3947c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3948c609719bSwdenk 3949c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3950c609719bSwdenk 3951c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3952c609719bSwdenk 3953e2a53458SMike Frysinger ethprime - controls which interface is used first. 3954a3d991bdSwdenk 3955e2a53458SMike Frysinger ethact - controls which interface is currently active. 3956e2a53458SMike Frysinger For example you can do the following 3957a3d991bdSwdenk 395848690d80SHeiko Schocher => setenv ethact FEC 395948690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 396048690d80SHeiko Schocher => setenv ethact SCC 396148690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3962a3d991bdSwdenk 3963e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3964e1692577SMatthias Fuchs available network interfaces. 3965e1692577SMatthias Fuchs It just stays at the currently selected interface. 3966e1692577SMatthias Fuchs 3967a3d991bdSwdenk netretry - When set to "no" each network operation will 3968a3d991bdSwdenk either succeed or fail without retrying. 39696e592385Swdenk When set to "once" the network operation will 39706e592385Swdenk fail when all the available network interfaces 39716e592385Swdenk are tried once without success. 3972a3d991bdSwdenk Useful on scripts which control the retry operation 3973a3d991bdSwdenk themselves. 3974a3d991bdSwdenk 3975b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3976a1cf027aSJean-Christophe PLAGNIOL-VILLARD 397728cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3978ecb0ccd9SWolfgang Denk UDP source port. 3979ecb0ccd9SWolfgang Denk 398028cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 398128cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 398228cb9375SWolfgang Denk 3983c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3984c96f86eeSWolfgang Denk we use the TFTP server's default block size 3985c96f86eeSWolfgang Denk 3986c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3987c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3988c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3989c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3990c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3991c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3992c96f86eeSWolfgang Denk with unreliable TFTP servers. 3993c96f86eeSWolfgang Denk 3994a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 399511ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3996a3d991bdSwdenk VLAN tagged frames. 3997c609719bSwdenk 3998dc0b7b0eSJason HobbsThe following image location variables contain the location of images 3999dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4000dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4001dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4002dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4003dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4004dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4005dc0b7b0eSJason Hobbs 4006dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4007dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4008dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4009dc0b7b0eSJason Hobbs 4010dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4011dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4012dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4013dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4014dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4015dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4016dc0b7b0eSJason Hobbs 4017c609719bSwdenkThe following environment variables may be used and automatically 4018c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4019c609719bSwdenkdepending the information provided by your boot server: 4020c609719bSwdenk 4021c609719bSwdenk bootfile - see above 4022c609719bSwdenk dnsip - IP address of your Domain Name Server 4023fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4024c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4025c609719bSwdenk hostname - Target hostname 4026c609719bSwdenk ipaddr - see above 4027c609719bSwdenk netmask - Subnet Mask 4028c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4029c609719bSwdenk serverip - see above 4030c609719bSwdenk 4031c609719bSwdenk 4032c609719bSwdenkThere are two special Environment Variables: 4033c609719bSwdenk 4034c609719bSwdenk serial# - contains hardware identification information such 4035c609719bSwdenk as type string and/or serial number 4036c609719bSwdenk ethaddr - Ethernet address 4037c609719bSwdenk 4038c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4039c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4040c609719bSwdenkonce they have been set once. 4041c609719bSwdenk 4042c609719bSwdenk 4043c1551ea8SstroeseFurther special Environment Variables: 4044c1551ea8Sstroese 4045c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4046c1551ea8Sstroese with the "version" command. This variable is 4047c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4048c1551ea8Sstroese 4049c1551ea8Sstroese 4050c609719bSwdenkPlease note that changes to some configuration parameters may take 4051c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4052c609719bSwdenk 4053c609719bSwdenk 4054f07771ccSwdenkCommand Line Parsing: 4055f07771ccSwdenk===================== 4056f07771ccSwdenk 4057f07771ccSwdenkThere are two different command line parsers available with U-Boot: 40587152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4059f07771ccSwdenk 4060f07771ccSwdenkOld, simple command line parser: 4061f07771ccSwdenk-------------------------------- 4062f07771ccSwdenk 4063f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4064f07771ccSwdenk- several commands on one line, separated by ';' 4065fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4066f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4067f07771ccSwdenk for example: 4068fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4069f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4070f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4071f07771ccSwdenk 4072f07771ccSwdenkHush shell: 4073f07771ccSwdenk----------- 4074f07771ccSwdenk 4075f07771ccSwdenk- similar to Bourne shell, with control structures like 4076f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4077f07771ccSwdenk until...do...done, ... 4078f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4079f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4080f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4081f07771ccSwdenk command 4082f07771ccSwdenk 4083f07771ccSwdenkGeneral rules: 4084f07771ccSwdenk-------------- 4085f07771ccSwdenk 4086f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4087f07771ccSwdenk command) contains several commands separated by semicolon, and 4088f07771ccSwdenk one of these commands fails, then the remaining commands will be 4089f07771ccSwdenk executed anyway. 4090f07771ccSwdenk 4091f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 409211ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4093f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4094f07771ccSwdenk variables are not executed. 4095f07771ccSwdenk 4096c609719bSwdenkNote for Redundant Ethernet Interfaces: 4097c609719bSwdenk======================================= 4098c609719bSwdenk 409911ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4100c609719bSwdenksuch configurations and is capable of automatic selection of a 41017152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4102c609719bSwdenk 4103c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4104c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4105c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4106c609719bSwdenk 4107c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4108c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4109c609719bSwdenkding setting in the environment; if the corresponding environment 4110c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4111c609719bSwdenk 4112c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4113c609719bSwdenk environment, the SROM's address is used. 4114c609719bSwdenk 4115c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4116c609719bSwdenk environment exists, then the value from the environment variable is 4117c609719bSwdenk used. 4118c609719bSwdenk 4119c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4120c609719bSwdenk both addresses are the same, this MAC address is used. 4121c609719bSwdenk 4122c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4123c609719bSwdenk addresses differ, the value from the environment is used and a 4124c609719bSwdenk warning is printed. 4125c609719bSwdenk 4126c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4127c609719bSwdenk is raised. 4128c609719bSwdenk 4129ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4130ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4131ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4132ecee9324SBen WarrenThe naming convention is as follows: 4133ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4134c609719bSwdenk 4135c609719bSwdenkImage Formats: 4136c609719bSwdenk============== 4137c609719bSwdenk 41383310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 41393310c549SMarian Balakowiczimages in two formats: 41403310c549SMarian Balakowicz 41413310c549SMarian BalakowiczNew uImage format (FIT) 41423310c549SMarian Balakowicz----------------------- 41433310c549SMarian Balakowicz 41443310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 41453310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 41463310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 41473310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 41483310c549SMarian Balakowicz 41493310c549SMarian Balakowicz 41503310c549SMarian BalakowiczOld uImage format 41513310c549SMarian Balakowicz----------------- 41523310c549SMarian Balakowicz 41533310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 41543310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 41553310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4156c609719bSwdenk 4157c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4158c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4159f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4160f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4161f5ed9e39SPeter Tyser INTEGRITY). 41627b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4163afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4164afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4165c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4166c609719bSwdenk* Load Address 4167c609719bSwdenk* Entry Point 4168c609719bSwdenk* Image Name 4169c609719bSwdenk* Image Timestamp 4170c609719bSwdenk 4171c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4172c609719bSwdenkand the data portions of the image are secured against corruption by 4173c609719bSwdenkCRC32 checksums. 4174c609719bSwdenk 4175c609719bSwdenk 4176c609719bSwdenkLinux Support: 4177c609719bSwdenk============== 4178c609719bSwdenk 4179c609719bSwdenkAlthough U-Boot should support any OS or standalone application 41807152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4181c609719bSwdenkU-Boot. 4182c609719bSwdenk 4183c609719bSwdenkU-Boot includes many features that so far have been part of some 4184c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4185c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4186c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 41877152b1d0Swdenkserves several purposes: 4188c609719bSwdenk 4189c609719bSwdenk- the same features can be used for other OS or standalone 4190c609719bSwdenk applications (for instance: using compressed images to reduce the 4191c609719bSwdenk Flash memory footprint) 4192c609719bSwdenk 4193c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 41947152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4195c609719bSwdenk 4196c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4197c609719bSwdenk images; of course this also means that different kernel images can 4198c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4199c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4200c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4201c609719bSwdenk software is easier now. 4202c609719bSwdenk 4203c609719bSwdenk 4204c609719bSwdenkLinux HOWTO: 4205c609719bSwdenk============ 4206c609719bSwdenk 4207c609719bSwdenkPorting Linux to U-Boot based systems: 4208c609719bSwdenk--------------------------------------- 4209c609719bSwdenk 4210c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4211c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4212c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4213c609719bSwdenkLinux :-). 4214c609719bSwdenk 4215a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4216c609719bSwdenk 4217c609719bSwdenkJust make sure your machine specific header file (for instance 4218c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 42191dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 42201dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 42216d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4222c609719bSwdenk 4223c609719bSwdenk 4224c609719bSwdenkConfiguring the Linux kernel: 4225c609719bSwdenk----------------------------- 4226c609719bSwdenk 4227c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4228c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4229c609719bSwdenk 4230c609719bSwdenk 4231c609719bSwdenkBuilding a Linux Image: 4232c609719bSwdenk----------------------- 4233c609719bSwdenk 423424ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 423524ee89b9Swdenknot used. If you use recent kernel source, a new build target 423624ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 423724ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 423824ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 423924ee89b9Swdenk100% compatible format. 4240c609719bSwdenk 4241c609719bSwdenkExample: 4242c609719bSwdenk 4243c609719bSwdenk make TQM850L_config 4244c609719bSwdenk make oldconfig 4245c609719bSwdenk make dep 424624ee89b9Swdenk make uImage 4247c609719bSwdenk 424824ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 424924ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 425024ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4251c609719bSwdenk 425224ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 425324ee89b9Swdenk 425424ee89b9Swdenk* convert the kernel into a raw binary image: 425524ee89b9Swdenk 425624ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 425724ee89b9Swdenk -R .note -R .comment \ 425824ee89b9Swdenk -S vmlinux linux.bin 425924ee89b9Swdenk 426024ee89b9Swdenk* compress the binary image: 426124ee89b9Swdenk 426224ee89b9Swdenk gzip -9 linux.bin 426324ee89b9Swdenk 426424ee89b9Swdenk* package compressed binary image for U-Boot: 426524ee89b9Swdenk 426624ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 426724ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 426824ee89b9Swdenk -d linux.bin.gz uImage 426924ee89b9Swdenk 427024ee89b9Swdenk 427124ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 427224ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 427324ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 427424ee89b9Swdenkbyte header containing information about target architecture, 427524ee89b9Swdenkoperating system, image type, compression method, entry points, time 427624ee89b9Swdenkstamp, CRC32 checksums, etc. 427724ee89b9Swdenk 427824ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 427924ee89b9Swdenkprint the header information, or to build new images. 4280c609719bSwdenk 4281c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4282c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4283c609719bSwdenkchecksum verification: 4284c609719bSwdenk 4285c609719bSwdenk tools/mkimage -l image 4286c609719bSwdenk -l ==> list image header information 4287c609719bSwdenk 4288c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4289c609719bSwdenkfrom a "data file" which is used as image payload: 4290c609719bSwdenk 4291c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4292c609719bSwdenk -n name -d data_file image 4293c609719bSwdenk -A ==> set architecture to 'arch' 4294c609719bSwdenk -O ==> set operating system to 'os' 4295c609719bSwdenk -T ==> set image type to 'type' 4296c609719bSwdenk -C ==> set compression type 'comp' 4297c609719bSwdenk -a ==> set load address to 'addr' (hex) 4298c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4299c609719bSwdenk -n ==> set image name to 'name' 4300c609719bSwdenk -d ==> use image data from 'datafile' 4301c609719bSwdenk 430269459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 430369459791Swdenkaddress (0x00000000), but the entry point address depends on the 430469459791Swdenkkernel version: 4305c609719bSwdenk 4306c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 430724ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4308c609719bSwdenk 4309c609719bSwdenkSo a typical call to build a U-Boot image would read: 4310c609719bSwdenk 431124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 431224ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4313a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 431424ee89b9Swdenk > examples/uImage.TQM850L 431524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4316c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4317c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4318c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4319c609719bSwdenk Load Address: 0x00000000 432024ee89b9Swdenk Entry Point: 0x00000000 4321c609719bSwdenk 4322c609719bSwdenkTo verify the contents of the image (or check for corruption): 4323c609719bSwdenk 432424ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 432524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4326c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4327c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4328c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4329c609719bSwdenk Load Address: 0x00000000 433024ee89b9Swdenk Entry Point: 0x00000000 4331c609719bSwdenk 4332c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4333c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4334c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4335c609719bSwdenkneed to be uncompressed: 4336c609719bSwdenk 4337a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 433824ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 433924ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4340a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 434124ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 434224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4343c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4344c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4345c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4346c609719bSwdenk Load Address: 0x00000000 434724ee89b9Swdenk Entry Point: 0x00000000 4348c609719bSwdenk 4349c609719bSwdenk 4350c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4351c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4352c609719bSwdenk 4353c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4354c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4355c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4356c609719bSwdenk Image Name: Simple Ramdisk Image 4357c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4358c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4359c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4360c609719bSwdenk Load Address: 0x00000000 4361c609719bSwdenk Entry Point: 0x00000000 4362c609719bSwdenk 4363c609719bSwdenk 4364c609719bSwdenkInstalling a Linux Image: 4365c609719bSwdenk------------------------- 4366c609719bSwdenk 4367c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4368c609719bSwdenkyou must convert the image to S-Record format: 4369c609719bSwdenk 4370c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4371c609719bSwdenk 4372c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4373c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4374c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4375c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4376c609719bSwdenkcommand. 4377c609719bSwdenk 4378c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4379c609719bSwdenkTQM8xxL is in the first Flash bank): 4380c609719bSwdenk 4381c609719bSwdenk => erase 40100000 401FFFFF 4382c609719bSwdenk 4383c609719bSwdenk .......... done 4384c609719bSwdenk Erased 8 sectors 4385c609719bSwdenk 4386c609719bSwdenk => loads 40100000 4387c609719bSwdenk ## Ready for S-Record download ... 4388c609719bSwdenk ~>examples/image.srec 4389c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4390c609719bSwdenk ... 4391c609719bSwdenk 15989 15990 15991 15992 4392c609719bSwdenk [file transfer complete] 4393c609719bSwdenk [connected] 4394c609719bSwdenk ## Start Addr = 0x00000000 4395c609719bSwdenk 4396c609719bSwdenk 4397c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4398c609719bSwdenkthis includes a checksum verification so you can be sure no data 4399c609719bSwdenkcorruption happened: 4400c609719bSwdenk 4401c609719bSwdenk => imi 40100000 4402c609719bSwdenk 4403c609719bSwdenk ## Checking Image at 40100000 ... 4404c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4405c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4406c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4407c609719bSwdenk Load Address: 00000000 4408c609719bSwdenk Entry Point: 0000000c 4409c609719bSwdenk Verifying Checksum ... OK 4410c609719bSwdenk 4411c609719bSwdenk 4412c609719bSwdenkBoot Linux: 4413c609719bSwdenk----------- 4414c609719bSwdenk 4415c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4416c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4417c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4418c609719bSwdenkparameters. You can check and modify this variable using the 4419c609719bSwdenk"printenv" and "setenv" commands: 4420c609719bSwdenk 4421c609719bSwdenk 4422c609719bSwdenk => printenv bootargs 4423c609719bSwdenk bootargs=root=/dev/ram 4424c609719bSwdenk 4425c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4426c609719bSwdenk 4427c609719bSwdenk => printenv bootargs 4428c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4429c609719bSwdenk 4430c609719bSwdenk => bootm 40020000 4431c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4432c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4433c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4434c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4435c609719bSwdenk Load Address: 00000000 4436c609719bSwdenk Entry Point: 0000000c 4437c609719bSwdenk Verifying Checksum ... OK 4438c609719bSwdenk Uncompressing Kernel Image ... OK 4439c609719bSwdenk 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 4440c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4441c609719bSwdenk time_init: decrementer frequency = 187500000/60 4442c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4443c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4444c609719bSwdenk ... 4445c609719bSwdenk 444611ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 44477152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4448c609719bSwdenkformat!) to the "bootm" command: 4449c609719bSwdenk 4450c609719bSwdenk => imi 40100000 40200000 4451c609719bSwdenk 4452c609719bSwdenk ## Checking Image at 40100000 ... 4453c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4454c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4455c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4456c609719bSwdenk Load Address: 00000000 4457c609719bSwdenk Entry Point: 0000000c 4458c609719bSwdenk Verifying Checksum ... OK 4459c609719bSwdenk 4460c609719bSwdenk ## Checking Image at 40200000 ... 4461c609719bSwdenk Image Name: Simple Ramdisk Image 4462c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4463c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4464c609719bSwdenk Load Address: 00000000 4465c609719bSwdenk Entry Point: 00000000 4466c609719bSwdenk Verifying Checksum ... OK 4467c609719bSwdenk 4468c609719bSwdenk => bootm 40100000 40200000 4469c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4470c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4471c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4472c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4473c609719bSwdenk Load Address: 00000000 4474c609719bSwdenk Entry Point: 0000000c 4475c609719bSwdenk Verifying Checksum ... OK 4476c609719bSwdenk Uncompressing Kernel Image ... OK 4477c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4478c609719bSwdenk Image Name: Simple Ramdisk Image 4479c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4480c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4481c609719bSwdenk Load Address: 00000000 4482c609719bSwdenk Entry Point: 00000000 4483c609719bSwdenk Verifying Checksum ... OK 4484c609719bSwdenk Loading Ramdisk ... OK 4485c609719bSwdenk 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 4486c609719bSwdenk Boot arguments: root=/dev/ram 4487c609719bSwdenk time_init: decrementer frequency = 187500000/60 4488c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4489c609719bSwdenk ... 4490c609719bSwdenk RAMDISK: Compressed image found at block 0 4491c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4492c609719bSwdenk 4493c609719bSwdenk bash# 4494c609719bSwdenk 44950267768eSMatthew McClintockBoot Linux and pass a flat device tree: 44960267768eSMatthew McClintock----------- 44970267768eSMatthew McClintock 44980267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 44990267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 45000267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 45010267768eSMatthew McClintockflat device tree: 45020267768eSMatthew McClintock 45030267768eSMatthew McClintock=> print oftaddr 45040267768eSMatthew McClintockoftaddr=0x300000 45050267768eSMatthew McClintock=> print oft 45060267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 45070267768eSMatthew McClintock=> tftp $oftaddr $oft 45080267768eSMatthew McClintockSpeed: 1000, full duplex 45090267768eSMatthew McClintockUsing TSEC0 device 45100267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 45110267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 45120267768eSMatthew McClintockLoad address: 0x300000 45130267768eSMatthew McClintockLoading: # 45140267768eSMatthew McClintockdone 45150267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 45160267768eSMatthew McClintock=> tftp $loadaddr $bootfile 45170267768eSMatthew McClintockSpeed: 1000, full duplex 45180267768eSMatthew McClintockUsing TSEC0 device 45190267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 45200267768eSMatthew McClintockFilename 'uImage'. 45210267768eSMatthew McClintockLoad address: 0x200000 45220267768eSMatthew McClintockLoading:############ 45230267768eSMatthew McClintockdone 45240267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 45250267768eSMatthew McClintock=> print loadaddr 45260267768eSMatthew McClintockloadaddr=200000 45270267768eSMatthew McClintock=> print oftaddr 45280267768eSMatthew McClintockoftaddr=0x300000 45290267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 45300267768eSMatthew McClintock## Booting image at 00200000 ... 45310267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 45320267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 45330267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 45340267768eSMatthew McClintock Load Address: 00000000 45350267768eSMatthew McClintock Entry Point: 00000000 45360267768eSMatthew McClintock Verifying Checksum ... OK 45370267768eSMatthew McClintock Uncompressing Kernel Image ... OK 45380267768eSMatthew McClintockBooting using flat device tree at 0x300000 45390267768eSMatthew McClintockUsing MPC85xx ADS machine description 45400267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 45410267768eSMatthew McClintock[snip] 45420267768eSMatthew McClintock 45430267768eSMatthew McClintock 45446069ff26SwdenkMore About U-Boot Image Types: 45456069ff26Swdenk------------------------------ 45466069ff26Swdenk 45476069ff26SwdenkU-Boot supports the following image types: 45486069ff26Swdenk 45496069ff26Swdenk "Standalone Programs" are directly runnable in the environment 45506069ff26Swdenk provided by U-Boot; it is expected that (if they behave 45516069ff26Swdenk well) you can continue to work in U-Boot after return from 45526069ff26Swdenk the Standalone Program. 45536069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 45546069ff26Swdenk will take over control completely. Usually these programs 45556069ff26Swdenk will install their own set of exception handlers, device 45566069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 45576069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 45586069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 45596069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 45606069ff26Swdenk being started. 45616069ff26Swdenk "Multi-File Images" contain several images, typically an OS 45626069ff26Swdenk (Linux) kernel image and one or more data images like 45636069ff26Swdenk RAMDisks. This construct is useful for instance when you want 45646069ff26Swdenk to boot over the network using BOOTP etc., where the boot 45656069ff26Swdenk server provides just a single image file, but you want to get 45666069ff26Swdenk for instance an OS kernel and a RAMDisk image. 45676069ff26Swdenk 45686069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 45696069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 45706069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 45716069ff26Swdenk Immediately after the terminating 0 follow the images, one by 45726069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 45736069ff26Swdenk a multiple of 4 bytes). 45746069ff26Swdenk 45756069ff26Swdenk "Firmware Images" are binary images containing firmware (like 45766069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 45776069ff26Swdenk flash memory. 45786069ff26Swdenk 45796069ff26Swdenk "Script files" are command sequences that will be executed by 45806069ff26Swdenk U-Boot's command interpreter; this feature is especially 45816069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 45826069ff26Swdenk as command interpreter. 45836069ff26Swdenk 458444f074c7SMarek VasutBooting the Linux zImage: 458544f074c7SMarek Vasut------------------------- 458644f074c7SMarek Vasut 458744f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 458844f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 458944f074c7SMarek Vasutas the syntax of "bootm" command. 459044f074c7SMarek Vasut 4591017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4592017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4593017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4594017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4595017e1f3fSMarek Vasut 4596c609719bSwdenk 4597c609719bSwdenkStandalone HOWTO: 4598c609719bSwdenk================= 4599c609719bSwdenk 4600c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4601c609719bSwdenkrun "standalone" applications, which can use some resources of 4602c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4603c609719bSwdenk 4604c609719bSwdenkTwo simple examples are included with the sources: 4605c609719bSwdenk 4606c609719bSwdenk"Hello World" Demo: 4607c609719bSwdenk------------------- 4608c609719bSwdenk 4609c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4610c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4611c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4612c609719bSwdenklike that: 4613c609719bSwdenk 4614c609719bSwdenk => loads 4615c609719bSwdenk ## Ready for S-Record download ... 4616c609719bSwdenk ~>examples/hello_world.srec 4617c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4618c609719bSwdenk [file transfer complete] 4619c609719bSwdenk [connected] 4620c609719bSwdenk ## Start Addr = 0x00040004 4621c609719bSwdenk 4622c609719bSwdenk => go 40004 Hello World! This is a test. 4623c609719bSwdenk ## Starting application at 0x00040004 ... 4624c609719bSwdenk Hello World 4625c609719bSwdenk argc = 7 4626c609719bSwdenk argv[0] = "40004" 4627c609719bSwdenk argv[1] = "Hello" 4628c609719bSwdenk argv[2] = "World!" 4629c609719bSwdenk argv[3] = "This" 4630c609719bSwdenk argv[4] = "is" 4631c609719bSwdenk argv[5] = "a" 4632c609719bSwdenk argv[6] = "test." 4633c609719bSwdenk argv[7] = "<NULL>" 4634c609719bSwdenk Hit any key to exit ... 4635c609719bSwdenk 4636c609719bSwdenk ## Application terminated, rc = 0x0 4637c609719bSwdenk 4638c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4639c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4640c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4641c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4642c609719bSwdenkcharacter, but this is just a demo program. The application can be 4643c609719bSwdenkcontrolled by the following keys: 4644c609719bSwdenk 4645c609719bSwdenk ? - print current values og the CPM Timer registers 4646c609719bSwdenk b - enable interrupts and start timer 4647c609719bSwdenk e - stop timer and disable interrupts 4648c609719bSwdenk q - quit application 4649c609719bSwdenk 4650c609719bSwdenk => loads 4651c609719bSwdenk ## Ready for S-Record download ... 4652c609719bSwdenk ~>examples/timer.srec 4653c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4654c609719bSwdenk [file transfer complete] 4655c609719bSwdenk [connected] 4656c609719bSwdenk ## Start Addr = 0x00040004 4657c609719bSwdenk 4658c609719bSwdenk => go 40004 4659c609719bSwdenk ## Starting application at 0x00040004 ... 4660c609719bSwdenk TIMERS=0xfff00980 4661c609719bSwdenk Using timer 1 4662c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4663c609719bSwdenk 4664c609719bSwdenkHit 'b': 4665c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4666c609719bSwdenk Enabling timer 4667c609719bSwdenkHit '?': 4668c609719bSwdenk [q, b, e, ?] ........ 4669c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4670c609719bSwdenkHit '?': 4671c609719bSwdenk [q, b, e, ?] . 4672c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4673c609719bSwdenkHit '?': 4674c609719bSwdenk [q, b, e, ?] . 4675c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4676c609719bSwdenkHit '?': 4677c609719bSwdenk [q, b, e, ?] . 4678c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4679c609719bSwdenkHit 'e': 4680c609719bSwdenk [q, b, e, ?] ...Stopping timer 4681c609719bSwdenkHit 'q': 4682c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4683c609719bSwdenk 4684c609719bSwdenk 468585ec0bccSwdenkMinicom warning: 468685ec0bccSwdenk================ 468785ec0bccSwdenk 46887152b1d0SwdenkOver time, many people have reported problems when trying to use the 468985ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 469085ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4691f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 469285ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4693e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 4694e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 4695e53515a2SKarl O. Pincfor help with kermit. 4696e53515a2SKarl O. Pinc 469785ec0bccSwdenk 469852f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 469952f52c14Swdenkconfiguration to your "File transfer protocols" section: 470052f52c14Swdenk 470152f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 470252f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 470352f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 470452f52c14Swdenk 470552f52c14Swdenk 4706c609719bSwdenkNetBSD Notes: 4707c609719bSwdenk============= 4708c609719bSwdenk 4709c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4710c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4711c609719bSwdenk 4712c609719bSwdenkBuilding requires a cross environment; it is known to work on 4713c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4714c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4715c609719bSwdenkNote that the cross-powerpc package does not install include files; 4716c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4717c609719bSwdenkmissing. This file has to be installed and patched manually: 4718c609719bSwdenk 4719c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4720c609719bSwdenk # mkdir powerpc 4721c609719bSwdenk # ln -s powerpc machine 4722c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4723c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4724c609719bSwdenk 4725c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4726c609719bSwdenkand U-Boot include files. 4727c609719bSwdenk 4728c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4729c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4730c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4731c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 47322a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4733c609719bSwdenk 4734c609719bSwdenk 4735c609719bSwdenkImplementation Internals: 4736c609719bSwdenk========================= 4737c609719bSwdenk 4738c609719bSwdenkThe following is not intended to be a complete description of every 4739c609719bSwdenkimplementation detail. However, it should help to understand the 4740c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4741c609719bSwdenkhardware. 4742c609719bSwdenk 4743c609719bSwdenk 4744c609719bSwdenkInitial Stack, Global Data: 4745c609719bSwdenk--------------------------- 4746c609719bSwdenk 4747c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4748c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4749c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4750c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4751c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4752c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4753c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4754c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4755c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4756c609719bSwdenklocked as (mis-) used as memory, etc. 4757c609719bSwdenk 47587152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 47590668236bSWolfgang Denk U-Boot mailing list: 476043d9616cSwdenk 476143d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 476243d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 476343d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 476443d9616cSwdenk ... 476543d9616cSwdenk 476643d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 476743d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 476843d9616cSwdenk require any physical RAM backing up the cache. The cleverness 476943d9616cSwdenk is that the cache is being used as a temporary supply of 477043d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 477111ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 477243d9616cSwdenk can see how this works by studying the cache architecture and 477343d9616cSwdenk operation in the architecture and processor-specific manuals. 477443d9616cSwdenk 477543d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 477643d9616cSwdenk is another option for the system designer to use as an 477711ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 477843d9616cSwdenk option should work for you. Using CS 4 should be fine if your 477943d9616cSwdenk board designers haven't used it for something that would 478043d9616cSwdenk cause you grief during the initial boot! It is frequently not 478143d9616cSwdenk used. 478243d9616cSwdenk 47836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 478443d9616cSwdenk with your processor/board/system design. The default value 478543d9616cSwdenk you will find in any recent u-boot distribution in 47868a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 478743d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 478843d9616cSwdenk it above 400_0000. Just make sure your board has no resources 478943d9616cSwdenk that are supposed to respond to that address! That code in 479043d9616cSwdenk start.S has been around a while and should work as is when 479143d9616cSwdenk you get the config right. 479243d9616cSwdenk 479343d9616cSwdenk -Chris Hallinan 479443d9616cSwdenk DS4.COM, Inc. 479543d9616cSwdenk 4796c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4797c609719bSwdenkcode for the initialization procedures: 4798c609719bSwdenk 4799c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4800c609719bSwdenk to write it. 4801c609719bSwdenk 480211ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4803c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 48047152b1d0Swdenk zation is performed later (when relocating to RAM). 4805c609719bSwdenk 4806c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4807c609719bSwdenk that. 4808c609719bSwdenk 4809c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4810c609719bSwdenknormal global data to share information beween the code. But it 4811c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4812c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4813c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4814c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4815c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4816c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4817c609719bSwdenkreserve for this purpose. 4818c609719bSwdenk 48197152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4820c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4821c609719bSwdenkGCC's implementation. 4822c609719bSwdenk 4823c609719bSwdenkFor PowerPC, the following registers have specific use: 4824c609719bSwdenk R1: stack pointer 4825e7670f6cSWolfgang Denk R2: reserved for system use 4826c609719bSwdenk R3-R4: parameter passing and return values 4827c609719bSwdenk R5-R10: parameter passing 4828c609719bSwdenk R13: small data area pointer 4829c609719bSwdenk R30: GOT pointer 4830c609719bSwdenk R31: frame pointer 4831c609719bSwdenk 4832e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4833e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4834e6bee808SJoakim Tjernlund going back and forth between asm and C) 4835c609719bSwdenk 4836e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4837c609719bSwdenk 4838c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4839c609719bSwdenk address of the global data structure is known at compile time), 4840c609719bSwdenk but it turned out that reserving a register results in somewhat 4841c609719bSwdenk smaller code - although the code savings are not that big (on 4842c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4843c609719bSwdenk 624 text + 127 data). 4844c609719bSwdenk 4845c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 48464c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 48474c58eb55SMike Frysinger 4848c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 48494c58eb55SMike Frysinger 4850c609719bSwdenkOn ARM, the following registers are used: 4851c609719bSwdenk 4852c609719bSwdenk R0: function argument word/integer result 4853c609719bSwdenk R1-R3: function argument word 4854c609719bSwdenk R9: GOT pointer 4855c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4856c609719bSwdenk R11: argument (frame) pointer 4857c609719bSwdenk R12: temporary workspace 4858c609719bSwdenk R13: stack pointer 4859c609719bSwdenk R14: link register 4860c609719bSwdenk R15: program counter 4861c609719bSwdenk 4862c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4863c609719bSwdenk 48640df01fd3SThomas ChouOn Nios II, the ABI is documented here: 48650df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 48660df01fd3SThomas Chou 48670df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 48680df01fd3SThomas Chou 48690df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 48700df01fd3SThomas Chou to access small data sections, so gp is free. 48710df01fd3SThomas Chou 4872afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4873afc1ce82SMacpaul Lin 4874afc1ce82SMacpaul Lin R0-R1: argument/return 4875afc1ce82SMacpaul Lin R2-R5: argument 4876afc1ce82SMacpaul Lin R15: temporary register for assembler 4877afc1ce82SMacpaul Lin R16: trampoline register 4878afc1ce82SMacpaul Lin R28: frame pointer (FP) 4879afc1ce82SMacpaul Lin R29: global pointer (GP) 4880afc1ce82SMacpaul Lin R30: link register (LP) 4881afc1ce82SMacpaul Lin R31: stack pointer (SP) 4882afc1ce82SMacpaul Lin PC: program counter (PC) 4883afc1ce82SMacpaul Lin 4884afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4885afc1ce82SMacpaul Lin 4886d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4887d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4888c609719bSwdenk 4889c609719bSwdenkMemory Management: 4890c609719bSwdenk------------------ 4891c609719bSwdenk 4892c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4893c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4894c609719bSwdenk 4895c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4896c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4897c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4898c609719bSwdenkphysical memory banks. 4899c609719bSwdenk 4900c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4901c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4902c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4903c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 49046d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4905c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4906c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4907c609719bSwdenk 4908c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4909c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4910c609719bSwdenk 4911c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4912c609719bSwdenkthis: 4913c609719bSwdenk 4914c609719bSwdenk 0x0000 0000 Exception Vector code 4915c609719bSwdenk : 4916c609719bSwdenk 0x0000 1FFF 4917c609719bSwdenk 0x0000 2000 Free for Application Use 4918c609719bSwdenk : 4919c609719bSwdenk : 4920c609719bSwdenk 4921c609719bSwdenk : 4922c609719bSwdenk : 4923c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4924c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4925c609719bSwdenk 0x00FC 0000 Malloc Arena 4926c609719bSwdenk : 4927c609719bSwdenk 0x00FD FFFF 4928c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4929c609719bSwdenk ... eventually: LCD or video framebuffer 4930c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4931c609719bSwdenk 0x00FF FFFF [End of RAM] 4932c609719bSwdenk 4933c609719bSwdenk 4934c609719bSwdenkSystem Initialization: 4935c609719bSwdenk---------------------- 4936c609719bSwdenk 4937c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 493811ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4939c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 49407152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4941c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4942c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4943c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4944c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4945c609719bSwdenkthe caches and the SIU. 4946c609719bSwdenk 4947c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4948c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4949c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4950c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4951c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4952c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4953c609719bSwdenkbanks. 4954c609719bSwdenk 4955c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 49567152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4957c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4958c609719bSwdenk0x00000000, with any additional banks following immediately to create 4959c609719bSwdenkcontiguous memory starting from 0. 4960c609719bSwdenk 4961c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4962c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4963c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4964c609719bSwdenkpages, and the final stack is set up. 4965c609719bSwdenk 4966c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4967c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4968c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4969c609719bSwdenknew address in RAM. 4970c609719bSwdenk 4971c609719bSwdenk 4972c609719bSwdenkU-Boot Porting Guide: 4973c609719bSwdenk---------------------- 4974c609719bSwdenk 4975c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 49766aff3115Swdenklist, October 2002] 4977c609719bSwdenk 4978c609719bSwdenk 4979c609719bSwdenkint main(int argc, char *argv[]) 4980c609719bSwdenk{ 4981c609719bSwdenk sighandler_t no_more_time; 4982c609719bSwdenk 4983c609719bSwdenk signal(SIGALRM, no_more_time); 4984c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4985c609719bSwdenk 4986c609719bSwdenk if (available_money > available_manpower) { 49876c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4988c609719bSwdenk return 0; 4989c609719bSwdenk } 4990c609719bSwdenk 4991c609719bSwdenk Download latest U-Boot source; 4992c609719bSwdenk 49930668236bSWolfgang Denk Subscribe to u-boot mailing list; 49946aff3115Swdenk 49956c3fef28SJerry Van Baren if (clueless) 4996c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4997c609719bSwdenk 4998c609719bSwdenk while (learning) { 4999c609719bSwdenk Read the README file in the top level directory; 50007cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 50016c3fef28SJerry Van Baren Read applicable doc/*.README; 5002c609719bSwdenk Read the source, Luke; 50036c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5004c609719bSwdenk } 5005c609719bSwdenk 50066c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 50076c3fef28SJerry Van Baren Buy a BDI3000; 50086c3fef28SJerry Van Baren else 5009c609719bSwdenk Add a lot of aggravation and time; 5010c609719bSwdenk 50116c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 50126c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 50136c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 50146c3fef28SJerry Van Baren } else { 5015c609719bSwdenk Create your own board support subdirectory; 50166c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 50176c3fef28SJerry Van Baren } 50186c3fef28SJerry Van Baren Edit new board/<myboard> files 50196c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5020c609719bSwdenk 50216c3fef28SJerry Van Baren while (!accepted) { 5022c609719bSwdenk while (!running) { 5023c609719bSwdenk do { 5024c609719bSwdenk Add / modify source code; 5025c609719bSwdenk } until (compiles); 5026c609719bSwdenk Debug; 5027c609719bSwdenk if (clueless) 5028c609719bSwdenk email("Hi, I am having problems..."); 5029c609719bSwdenk } 50306c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 50316c3fef28SJerry Van Baren if (reasonable critiques) 50326c3fef28SJerry Van Baren Incorporate improvements from email list code review; 50336c3fef28SJerry Van Baren else 50346c3fef28SJerry Van Baren Defend code as written; 50356c3fef28SJerry Van Baren } 5036c609719bSwdenk 5037c609719bSwdenk return 0; 5038c609719bSwdenk} 5039c609719bSwdenk 5040c609719bSwdenkvoid no_more_time (int sig) 5041c609719bSwdenk{ 5042c609719bSwdenk hire_a_guru(); 5043c609719bSwdenk} 5044c609719bSwdenk 5045c609719bSwdenk 5046c609719bSwdenkCoding Standards: 5047c609719bSwdenk----------------- 5048c609719bSwdenk 5049c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 50502c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 50517ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5052c609719bSwdenk 50532c051651SDetlev ZundelSource files originating from a different project (for example the 50542c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 50552c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 50562c051651SDetlev Zundelsources. 50572c051651SDetlev Zundel 50582c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 50592c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 50602c051651SDetlev Zundelin your code. 5061c609719bSwdenk 5062c178d3daSwdenkPlease also stick to the following formatting rules: 5063180d3f74Swdenk- remove any trailing white space 50647ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5065180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 50667ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5067180d3f74Swdenk- do not add trailing empty lines to source files 5068180d3f74Swdenk 5069c609719bSwdenkSubmissions which do not conform to the standards may be returned 5070c609719bSwdenkwith a request to reformat the changes. 5071c609719bSwdenk 5072c609719bSwdenk 5073c609719bSwdenkSubmitting Patches: 5074c609719bSwdenk------------------- 5075c609719bSwdenk 5076c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5077c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5078c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5079c609719bSwdenk 50800d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5081218ca724SWolfgang Denk 50820668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 50830668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 50840668236bSWolfgang Denk 5085c609719bSwdenkWhen you send a patch, please include the following information with 5086c609719bSwdenkit: 5087c609719bSwdenk 5088c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5089c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5090c609719bSwdenk patch actually fixes something. 5091c609719bSwdenk 5092c609719bSwdenk* For new features: a description of the feature and your 5093c609719bSwdenk implementation. 5094c609719bSwdenk 5095c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5096c609719bSwdenk 5097c609719bSwdenk* For major contributions, your entry to the CREDITS file 5098c609719bSwdenk 5099c609719bSwdenk* When you add support for a new board, don't forget to add this 51007ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5101c609719bSwdenk 5102c609719bSwdenk* If your patch adds new configuration options, don't forget to 5103c609719bSwdenk document these in the README file. 5104c609719bSwdenk 5105218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5106218ca724SWolfgang Denk recommended) you can easily generate the patch using the 51077ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5108218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5109218ca724SWolfgang Denk with some other mail clients. 5110c609719bSwdenk 5111218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5112218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5113218ca724SWolfgang Denk GNU diff. 51146dff5529Swdenk 5115218ca724SWolfgang Denk The current directory when running this command shall be the parent 5116218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5117218ca724SWolfgang Denk your patch includes sufficient directory information for the 5118218ca724SWolfgang Denk affected files). 5119218ca724SWolfgang Denk 5120218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5121218ca724SWolfgang Denk and compressed attachments must not be used. 5122c609719bSwdenk 512352f52c14Swdenk* If one logical set of modifications affects or creates several 512452f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 512552f52c14Swdenk 512652f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 512752f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 512852f52c14Swdenk 512952f52c14Swdenk 5130c609719bSwdenkNotes: 5131c609719bSwdenk 5132c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5133c609719bSwdenk source tree and make sure that no errors or warnings are reported 5134c609719bSwdenk for any of the boards. 5135c609719bSwdenk 5136c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5137c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5138c609719bSwdenk returned with a request to re-formatting / split it. 5139c609719bSwdenk 5140c609719bSwdenk* If you modify existing code, make sure that your new code does not 5141c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5142c609719bSwdenk When adding new features, these should compile conditionally only 5143c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5144c609719bSwdenk disabled must not need more memory than the old code without your 5145c609719bSwdenk modification. 514690dc6704Swdenk 51470668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 51480668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 51490668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 51500668236bSWolfgang Denk bigger than the size limit should be avoided. 5151