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: 366ffd06e02SYork Sun CONFIG_SYS_PPC64 367ffd06e02SYork Sun 368ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 369ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 370ffd06e02SYork Sun compliance, among other possible reasons. 371ffd06e02SYork Sun 37266412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 37366412c63SKumar Gala 37466412c63SKumar Gala Defines the core time base clock divider ratio compared to the 37566412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 37666412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37766412c63SKumar Gala 3788f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3798f29084aSKumar Gala 3808f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3818f29084aSKumar Gala tree nodes for the given platform. 3828f29084aSKumar Gala 383afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 384afa6b551SPrabhakar Kushwaha 385afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 386afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 387afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 388afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 389afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 390afa6b551SPrabhakar Kushwaha purpose. 391afa6b551SPrabhakar Kushwaha 39233eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 39333eee330SScott Wood 39433eee330SScott Wood Enables a workaround for erratum A004510. If set, 39533eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 39633eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 39733eee330SScott Wood 39833eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 39933eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 40033eee330SScott Wood 40133eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 40233eee330SScott Wood for which the A004510 workaround should be applied. 40333eee330SScott Wood 40433eee330SScott Wood The rest of SVR is either not relevant to the decision 40533eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 40633eee330SScott Wood p2041) or is implied by the build target, which controls 40733eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 40833eee330SScott Wood 40933eee330SScott Wood See Freescale App Note 4493 for more information about 41033eee330SScott Wood this erratum. 41133eee330SScott Wood 41233eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 41333eee330SScott Wood 41433eee330SScott Wood This is the value to write into CCSR offset 0x18600 41533eee330SScott Wood according to the A004510 workaround. 41633eee330SScott Wood 4176cb461b4SDaniel Schwierzeck- Generic CPU options: 4186cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4196cb461b4SDaniel Schwierzeck 4206cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4216cb461b4SDaniel Schwierzeck values is arch specific. 4226cb461b4SDaniel Schwierzeck 4230b953ffcSMarkus Klotzbuecher- Intel Monahans options: 4246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 4250b953ffcSMarkus Klotzbuecher 4260b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 4270b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 4280b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 4290b953ffcSMarkus Klotzbuecher 4306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 4310b953ffcSMarkus Klotzbuecher 4320b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 4330b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 4340b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 4350b953ffcSMarkus Klotzbuecher by this value. 4360b953ffcSMarkus Klotzbuecher 43792bbd64eSDaniel Schwierzeck- MIPS CPU options: 43892bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 43992bbd64eSDaniel Schwierzeck 44092bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 44192bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 44292bbd64eSDaniel Schwierzeck relocation. 44392bbd64eSDaniel Schwierzeck 44492bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 44592bbd64eSDaniel Schwierzeck 44692bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 44792bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 44892bbd64eSDaniel Schwierzeck Possible values are: 44992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 45092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 45192bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 45292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 45392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 45492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 45592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 45692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 45792bbd64eSDaniel Schwierzeck 45892bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 45992bbd64eSDaniel Schwierzeck 46092bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 46192bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 46292bbd64eSDaniel Schwierzeck 46392bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 46492bbd64eSDaniel Schwierzeck 46592bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 46692bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 46792bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 46892bbd64eSDaniel Schwierzeck 469b67d8816SChristian Riesch- ARM options: 470b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 471b67d8816SChristian Riesch 472b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 473b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 474b67d8816SChristian Riesch 4755356f545SAneesh V CONFIG_SYS_THUMB_BUILD 4765356f545SAneesh V 4775356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 4785356f545SAneesh V set for ARM architectures. Thumb instruction set provides 4795356f545SAneesh V better code density. For ARM architectures that support 4805356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 4815356f545SAneesh V GCC. 4825356f545SAneesh V 4835da627a4Swdenk- Linux Kernel Interface: 484c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 485c609719bSwdenk 486c609719bSwdenk U-Boot stores all clock information in Hz 487c609719bSwdenk internally. For binary compatibility with older Linux 488c609719bSwdenk kernels (which expect the clocks passed in the 489c609719bSwdenk bd_info data to be in MHz) the environment variable 490c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 491c609719bSwdenk converts clock data to MHZ before passing it to the 492c609719bSwdenk Linux kernel. 493c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 494c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 495c609719bSwdenk default environment. 496c609719bSwdenk 4975da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 4985da627a4Swdenk 49911ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 5005da627a4Swdenk expect it to be in bytes, others in MB. 5015da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 5025da627a4Swdenk 503fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 504f57f70aaSWolfgang Denk 505f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 506213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 507213bf8c8SGerald Van Baren concepts). 508213bf8c8SGerald Van Baren 509213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 510213bf8c8SGerald Van Baren * New libfdt-based support 511213bf8c8SGerald Van Baren * Adds the "fdt" command 5123bb342fcSKim Phillips * The bootm command automatically updates the fdt 513213bf8c8SGerald Van Baren 514b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 515b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 516b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 517b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 518f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 519c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 520f57f70aaSWolfgang Denk 52111ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 52211ccc33fSMarcel Ziswiler addresses 5233bb342fcSKim Phillips 5244e253137SKumar Gala CONFIG_OF_BOARD_SETUP 5254e253137SKumar Gala 5264e253137SKumar Gala Board code has addition modification that it wants to make 5274e253137SKumar Gala to the flat device tree before handing it off to the kernel 5286705d81eSwdenk 5290267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 5300267768eSMatthew McClintock 53111ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 5320267768eSMatthew McClintock param header, the default value is zero if undefined. 5330267768eSMatthew McClintock 5343887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 5353887c3fbSHeiko Schocher 5363887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 5373887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 5383887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 5393887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 5403887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 5413887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 5423887c3fbSHeiko Schocher 5437eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 5447eb29398SIgor Grinberg 5457eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 5467eb29398SIgor Grinberg machine type and must be used to specify the machine type 5477eb29398SIgor Grinberg number as it appears in the ARM machine registry 5487eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 5497eb29398SIgor Grinberg Only boards that have multiple machine types supported 5507eb29398SIgor Grinberg in a single configuration file and the machine type is 5517eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 5527eb29398SIgor Grinberg 5530b2f4ecaSNiklaus Giger- vxWorks boot parameters: 5540b2f4ecaSNiklaus Giger 5550b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 5560b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 5570b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 5580b2f4ecaSNiklaus Giger 5590b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5600b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5610b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5620b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5630b2f4ecaSNiklaus Giger 5640b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5650b2f4ecaSNiklaus Giger 5660b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5670b2f4ecaSNiklaus Giger 5680b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5690b2f4ecaSNiklaus Giger the defaults discussed just above. 5700b2f4ecaSNiklaus Giger 5712c451f78SAneesh V- Cache Configuration: 5722c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 5732c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 5742c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 5752c451f78SAneesh V 57693bc2193SAneesh V- Cache Configuration for ARM: 57793bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 57893bc2193SAneesh V controller 57993bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 58093bc2193SAneesh V controller register space 58193bc2193SAneesh V 5826705d81eSwdenk- Serial Ports: 58348d0192fSAndreas Engel CONFIG_PL010_SERIAL 5846705d81eSwdenk 5856705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 5866705d81eSwdenk 58748d0192fSAndreas Engel CONFIG_PL011_SERIAL 5886705d81eSwdenk 5896705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 5906705d81eSwdenk 5916705d81eSwdenk CONFIG_PL011_CLOCK 5926705d81eSwdenk 5936705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 5946705d81eSwdenk the clock speed of the UARTs. 5956705d81eSwdenk 5966705d81eSwdenk CONFIG_PL01x_PORTS 5976705d81eSwdenk 5986705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 5996705d81eSwdenk define this to a list of base addresses for each (supported) 6006705d81eSwdenk port. See e.g. include/configs/versatile.h 6016705d81eSwdenk 602910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 603910f1ae3SJohn Rigby 604910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 605910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 606910f1ae3SJohn Rigby this variable to initialize the extra register. 607910f1ae3SJohn Rigby 608910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 609910f1ae3SJohn Rigby 610910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 611910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 612910f1ae3SJohn Rigby variable to flush the UART at init time. 613910f1ae3SJohn Rigby 6146705d81eSwdenk 615c609719bSwdenk- Console Interface: 616c609719bSwdenk Depending on board, define exactly one serial port 617c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 618c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 619c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 620c609719bSwdenk 621c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 622c609719bSwdenk port routines must be defined elsewhere 623c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 624c609719bSwdenk 625c609719bSwdenk CONFIG_CFB_CONSOLE 626c609719bSwdenk Enables console device for a color framebuffer. Needs following 627c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 628c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 629c609719bSwdenk (default big endian) 630c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 631c609719bSwdenk rectangle fill 632c609719bSwdenk (cf. smiLynxEM) 633c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 634c609719bSwdenk bit-blit (cf. smiLynxEM) 635c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 636c609719bSwdenk (cols=pitch) 637c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 638c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 639c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 640c609719bSwdenk (0-5, cf. cfb_console.c) 641c609719bSwdenk VIDEO_FB_ADRS framebuffer address 642c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 643c609719bSwdenk (i.e. i8042_kbd_init()) 644c609719bSwdenk VIDEO_TSTC_FCT test char fct 645c609719bSwdenk (i.e. i8042_tstc) 646c609719bSwdenk VIDEO_GETC_FCT get char fct 647c609719bSwdenk (i.e. i8042_getc) 648c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 649c609719bSwdenk (requires blink timer 650c609719bSwdenk cf. i8042.c) 6516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 652c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 653c609719bSwdenk upper right corner 654602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 655c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 656c609719bSwdenk upper left corner 657a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 658a6c7ad2fSwdenk linux_logo.h for logo. 659a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 660c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 66111ccc33fSMarcel Ziswiler additional board info beside 662c609719bSwdenk the logo 663c609719bSwdenk 66433a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 66533a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 66633a35bbbSPali Rohár erase functions and limited graphics rendition control). 66733a35bbbSPali Rohár 668c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 669c609719bSwdenk default i/o. Serial console can be forced with 670c609719bSwdenk environment 'console=serial'. 671c609719bSwdenk 672a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 673a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 674a3ad8e26Swdenk the "silent" environment variable. See 675a3ad8e26Swdenk doc/README.silent for more information. 676a3ad8e26Swdenk 677c609719bSwdenk- Console Baudrate: 678c609719bSwdenk CONFIG_BAUDRATE - in bps 679c609719bSwdenk Select one of the baudrates listed in 6806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 682c609719bSwdenk 683c92fac91SHeiko Schocher- Console Rx buffer length 684c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 685c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6862b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 687c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 688c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 689c92fac91SHeiko Schocher the SMC. 690c92fac91SHeiko Schocher 6919558b48aSGraeme Russ- Pre-Console Buffer: 6929558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 6939558b48aSGraeme Russ initialised etc) all console output is silently discarded. 6949558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 6959558b48aSGraeme Russ buffer any console messages prior to the console being 6969558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 6979558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 6989558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 6999558b48aSGraeme Russ bytes are output before the console is initialised, the 7009558b48aSGraeme Russ earlier bytes are discarded. 7019558b48aSGraeme Russ 7029558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 7039558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 7049558b48aSGraeme Russ 705046a37bdSSonny Rao- Safe printf() functions 706046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 707046a37bdSSonny Rao the printf() functions. These are defined in 708046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 709046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 710046a37bdSSonny Rao If this option is not given then these functions will 711046a37bdSSonny Rao silently discard their buffer size argument - this means 712046a37bdSSonny Rao you are not getting any overflow checking in this case. 713046a37bdSSonny Rao 714c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 715c609719bSwdenk Delay before automatically booting the default image; 716c609719bSwdenk set to -1 to disable autoboot. 71793d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 71893d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 719c609719bSwdenk 720c609719bSwdenk See doc/README.autoboot for these options that 721c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 722c609719bSwdenk CONFIG_BOOT_RETRY_TIME 723c609719bSwdenk CONFIG_BOOT_RETRY_MIN 724c609719bSwdenk CONFIG_AUTOBOOT_KEYED 725c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 726c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 727c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 728c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 729c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 730c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 731c609719bSwdenk CONFIG_RESET_TO_RETRY 732c609719bSwdenk 733c609719bSwdenk- Autoboot Command: 734c609719bSwdenk CONFIG_BOOTCOMMAND 735c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 736c609719bSwdenk define a command string that is automatically executed 737c609719bSwdenk when no character is read on the console interface 738c609719bSwdenk within "Boot Delay" after reset. 739c609719bSwdenk 740c609719bSwdenk CONFIG_BOOTARGS 741c609719bSwdenk This can be used to pass arguments to the bootm 742c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 743c609719bSwdenk environment value "bootargs". 744c609719bSwdenk 745c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 746c609719bSwdenk The value of these goes into the environment as 747c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 748c609719bSwdenk as a convenience, when switching between booting from 74911ccc33fSMarcel Ziswiler RAM and NFS. 750c609719bSwdenk 751c609719bSwdenk- Pre-Boot Commands: 752c609719bSwdenk CONFIG_PREBOOT 753c609719bSwdenk 754c609719bSwdenk When this option is #defined, the existence of the 755c609719bSwdenk environment variable "preboot" will be checked 756c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 757c609719bSwdenk countdown and/or running the auto-boot command resp. 758c609719bSwdenk entering interactive mode. 759c609719bSwdenk 760c609719bSwdenk This feature is especially useful when "preboot" is 761c609719bSwdenk automatically generated or modified. For an example 762c609719bSwdenk see the LWMON board specific code: here "preboot" is 763c609719bSwdenk modified when the user holds down a certain 764c609719bSwdenk combination of keys on the (special) keyboard when 765c609719bSwdenk booting the systems 766c609719bSwdenk 767c609719bSwdenk- Serial Download Echo Mode: 768c609719bSwdenk CONFIG_LOADS_ECHO 769c609719bSwdenk If defined to 1, all characters received during a 770c609719bSwdenk serial download (using the "loads" command) are 771c609719bSwdenk echoed back. This might be needed by some terminal 772c609719bSwdenk emulations (like "cu"), but may as well just take 773c609719bSwdenk time on others. This setting #define's the initial 774c609719bSwdenk value of the "loads_echo" environment variable. 775c609719bSwdenk 776602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 777c609719bSwdenk CONFIG_KGDB_BAUDRATE 778c609719bSwdenk Select one of the baudrates listed in 7796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 780c609719bSwdenk 781c609719bSwdenk- Monitor Functions: 782602ad3b3SJon Loeliger Monitor commands can be included or excluded 783602ad3b3SJon Loeliger from the build by using the #include files 784c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 785c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 786602ad3b3SJon Loeliger and augmenting with additional #define's 787602ad3b3SJon Loeliger for wanted commands. 788c609719bSwdenk 789602ad3b3SJon Loeliger The default command configuration includes all commands 790602ad3b3SJon Loeliger except those marked below with a "*". 791602ad3b3SJon Loeliger 792602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 793602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 794602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 795602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 796602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 797602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 798602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 799602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 800710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 801602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 802602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 803602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 804a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 805a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 806a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 807a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 808602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 809602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 810246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 811602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 812602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 8130c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 81403e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 81503e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 816bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 817602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 81803e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 819602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 820602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 821602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 822a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 823a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 824602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 825602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 826602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 827602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 828602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 829602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 8300c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 831c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 832602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 833602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 834602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 835602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 8361ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 837d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 838d22c338eSJoe Hershberger (169.254.*.*) 839602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 840602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 84102c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 84202c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 843602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 84456523f12Swdenk loop, loopw, mtest 845602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 846602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 847602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 84868d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 849602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 850602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 851e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 852e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 853602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 854602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 855602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 856602ad3b3SJon Loeliger host 857602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 858602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 859602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 860602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 861602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 862602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 863602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 864602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 865602ad3b3SJon Loeliger (4xx only) 866f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 867c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 86802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 86974de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 870602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 8717a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 8721fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 873da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 874da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 875602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 876602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 877c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 878c609719bSwdenk 879c609719bSwdenk 880c609719bSwdenk EXAMPLE: If you want all functions except of network 881c609719bSwdenk support you can write: 882c609719bSwdenk 883602ad3b3SJon Loeliger #include "config_cmd_all.h" 884602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 885c609719bSwdenk 886213bf8c8SGerald Van Baren Other Commands: 887213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 888c609719bSwdenk 889c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 890602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 891c609719bSwdenk what you (and your U-Boot users) are doing. Data 892c609719bSwdenk cache cannot be enabled on systems like the 8xx or 893c609719bSwdenk 8260 (where accesses to the IMMR region must be 894c609719bSwdenk uncached), and it cannot be disabled on all other 895c609719bSwdenk systems where we (mis-) use the data cache to hold an 896c609719bSwdenk initial stack and some data. 897c609719bSwdenk 898c609719bSwdenk 899c609719bSwdenk XXX - this list needs to get updated! 900c609719bSwdenk 90145ba8077SSimon Glass- Device tree: 90245ba8077SSimon Glass CONFIG_OF_CONTROL 90345ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 90445ba8077SSimon Glass to configure its devices, instead of relying on statically 90545ba8077SSimon Glass compiled #defines in the board file. This option is 90645ba8077SSimon Glass experimental and only available on a few boards. The device 90745ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 90845ba8077SSimon Glass 9092c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 9102c0f79e4SSimon Glass be done using one of the two options below: 911bbb0b128SSimon Glass 912bbb0b128SSimon Glass CONFIG_OF_EMBED 913bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 914bbb0b128SSimon Glass binary in its image. This device tree file should be in the 915bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 916bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 917bbb0b128SSimon Glass the global data structure as gd->blob. 91845ba8077SSimon Glass 9192c0f79e4SSimon Glass CONFIG_OF_SEPARATE 9202c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 9212c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 9222c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 9232c0f79e4SSimon Glass 9242c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 9252c0f79e4SSimon Glass 9262c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 9272c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 9282c0f79e4SSimon Glass still use the individual files if you need something more 9292c0f79e4SSimon Glass exotic. 9302c0f79e4SSimon Glass 931c609719bSwdenk- Watchdog: 932c609719bSwdenk CONFIG_WATCHDOG 933c609719bSwdenk If this variable is defined, it enables watchdog 9346abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 9356abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 9366abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 9376abe6fb6SDetlev Zundel register. When supported for a specific SoC is 9386abe6fb6SDetlev Zundel available, then no further board specific code should 9396abe6fb6SDetlev Zundel be needed to use it. 9406abe6fb6SDetlev Zundel 9416abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 9426abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 9436abe6fb6SDetlev Zundel SoC, then define this variable and provide board 9446abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 945c609719bSwdenk 946c1551ea8Sstroese- U-Boot Version: 947c1551ea8Sstroese CONFIG_VERSION_VARIABLE 948c1551ea8Sstroese If this variable is defined, an environment variable 949c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 950c1551ea8Sstroese version as printed by the "version" command. 951a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 952a1ea8e51SBenoît Thébaudeau next reset. 953c1551ea8Sstroese 954c609719bSwdenk- Real-Time Clock: 955c609719bSwdenk 956602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 957c609719bSwdenk has to be selected, too. Define exactly one of the 958c609719bSwdenk following options: 959c609719bSwdenk 960c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 961c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 9624e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 963c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 9641cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 965c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 9667f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 9673bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 9689536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 9694c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 9706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 97171d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 97271d19f30SHeiko Schocher RV3029 RTC. 973c609719bSwdenk 974b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 975b37c7e5eSwdenk must also be configured. See I2C Support, below. 976b37c7e5eSwdenk 977e92739d3SPeter Tyser- GPIO Support: 978e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 979e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 980e92739d3SPeter Tyser 9815dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 9825dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 9835dec49caSChris Packham pins supported by a particular chip. 9845dec49caSChris Packham 985e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 986e92739d3SPeter Tyser must also be configured. See I2C Support, below. 987e92739d3SPeter Tyser 988c609719bSwdenk- Timestamp Support: 989c609719bSwdenk 990c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 991c609719bSwdenk (date and time) of an image is printed by image 992c609719bSwdenk commands like bootm or iminfo. This option is 993602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 994c609719bSwdenk 995923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 996923c46f9SKarl O. Pinc Zero or more of the following: 997923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 998923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 999923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1000923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1001923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1002923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1003923c46f9SKarl O. Pinc disk/part_efi.c 1004923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1005c609719bSwdenk 1006602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1007218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1008923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1009c609719bSwdenk 1010c609719bSwdenk- IDE Reset method: 10114d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 10124d13cbadSwdenk board configurations files but used nowhere! 1013c609719bSwdenk 10144d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 10154d13cbadSwdenk be performed by calling the function 10164d13cbadSwdenk ide_set_reset(int reset) 10174d13cbadSwdenk which has to be defined in a board specific file 1018c609719bSwdenk 1019c609719bSwdenk- ATAPI Support: 1020c609719bSwdenk CONFIG_ATAPI 1021c609719bSwdenk 1022c609719bSwdenk Set this to enable ATAPI support. 1023c609719bSwdenk 1024c40b2956Swdenk- LBA48 Support 1025c40b2956Swdenk CONFIG_LBA48 1026c40b2956Swdenk 1027c40b2956Swdenk Set this to enable support for disks larger than 137GB 10284b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1029c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1030c40b2956Swdenk support disks up to 2.1TB. 1031c40b2956Swdenk 10326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1033c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1034c40b2956Swdenk Default is 32bit. 1035c40b2956Swdenk 1036c609719bSwdenk- SCSI Support: 1037c609719bSwdenk At the moment only there is only support for the 1038c609719bSwdenk SYM53C8XX SCSI controller; define 1039c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1040c609719bSwdenk 10416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 10426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 10436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1044c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1045c609719bSwdenk devices. 10466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1047c609719bSwdenk 1048447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1049447c031bSStefan Reinauer SCSI devices found during the last scan. 1050447c031bSStefan Reinauer 1051c609719bSwdenk- NETWORK Support (PCI): 1052682011ffSwdenk CONFIG_E1000 1053ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1054ce5207e1SKyle Moffett 1055ce5207e1SKyle Moffett CONFIG_E1000_SPI 1056ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1057ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1058ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1059ce5207e1SKyle Moffett 1060ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1061ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1062ce5207e1SKyle Moffett example with the "sspi" command. 1063ce5207e1SKyle Moffett 1064ce5207e1SKyle Moffett CONFIG_CMD_E1000 1065ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1066ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1067682011ffSwdenk 1068ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 106911ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1070ac3315c2SAndre Schwarz 1071c609719bSwdenk CONFIG_EEPRO100 1072c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 107311ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1074c609719bSwdenk write routine for first time initialisation. 1075c609719bSwdenk 1076c609719bSwdenk CONFIG_TULIP 1077c609719bSwdenk Support for Digital 2114x chips. 1078c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1079c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1080c609719bSwdenk 1081c609719bSwdenk CONFIG_NATSEMI 1082c609719bSwdenk Support for National dp83815 chips. 1083c609719bSwdenk 1084c609719bSwdenk CONFIG_NS8382X 1085c609719bSwdenk Support for National dp8382[01] gigabit chips. 1086c609719bSwdenk 108745219c46Swdenk- NETWORK Support (other): 108845219c46Swdenk 1089c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1090c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1091c041e9d2SJens Scharsig 1092c041e9d2SJens Scharsig CONFIG_RMII 1093c041e9d2SJens Scharsig Define this to use reduced MII inteface 1094c041e9d2SJens Scharsig 1095c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1096c041e9d2SJens Scharsig If this defined, the driver is quiet. 1097c041e9d2SJens Scharsig The driver doen't show link status messages. 1098c041e9d2SJens Scharsig 1099efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1100efdd7319SRob Herring Support for the Calxeda XGMAC device 1101efdd7319SRob Herring 11023bb46d23SAshok CONFIG_LAN91C96 110345219c46Swdenk Support for SMSC's LAN91C96 chips. 110445219c46Swdenk 110545219c46Swdenk CONFIG_LAN91C96_BASE 110645219c46Swdenk Define this to hold the physical address 110745219c46Swdenk of the LAN91C96's I/O space 110845219c46Swdenk 110945219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 111045219c46Swdenk Define this to enable 32 bit addressing 111145219c46Swdenk 11123bb46d23SAshok CONFIG_SMC91111 1113f39748aeSwdenk Support for SMSC's LAN91C111 chip 1114f39748aeSwdenk 1115f39748aeSwdenk CONFIG_SMC91111_BASE 1116f39748aeSwdenk Define this to hold the physical address 1117f39748aeSwdenk of the device (I/O space) 1118f39748aeSwdenk 1119f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1120f39748aeSwdenk Define this if data bus is 32 bits 1121f39748aeSwdenk 1122f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1123f39748aeSwdenk Define this to use i/o functions instead of macros 1124f39748aeSwdenk (some hardware wont work with macros) 1125f39748aeSwdenk 1126dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1127dc02badaSHeiko Schocher Support for davinci emac 1128dc02badaSHeiko Schocher 1129dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1130dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1131dc02badaSHeiko Schocher 1132b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1133b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1134b3dbf4a5SMacpaul Lin 1135b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1136b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1137b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1138b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1139b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1140b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1141b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1142b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1143b3dbf4a5SMacpaul Lin 1144c2fff331SMike Rapoport CONFIG_SMC911X 1145557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1146557b377dSJens Gehrlein 1147c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1148557b377dSJens Gehrlein Define this to hold the physical address 1149557b377dSJens Gehrlein of the device (I/O space) 1150557b377dSJens Gehrlein 1151c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1152557b377dSJens Gehrlein Define this if data bus is 32 bits 1153557b377dSJens Gehrlein 1154c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1155557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1156557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1157c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1158557b377dSJens Gehrlein 11593d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 11603d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 11613d0075faSYoshihiro Shimoda 11623d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 11633d0075faSYoshihiro Shimoda Define the number of ports to be used 11643d0075faSYoshihiro Shimoda 11653d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 11663d0075faSYoshihiro Shimoda Define the ETH PHY's address 11673d0075faSYoshihiro Shimoda 116868260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 116968260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 117068260aabSYoshihiro Shimoda 11715e124724SVadim Bendebury- TPM Support: 11725e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 11735e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 11745e124724SVadim Bendebury per system is supported at this time. 11755e124724SVadim Bendebury 11765e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 11775e124724SVadim Bendebury Base address where the generic TPM device is mapped 11785e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 11795e124724SVadim Bendebury 0xfed40000. 11805e124724SVadim Bendebury 1181c609719bSwdenk- USB Support: 1182c609719bSwdenk At the moment only the UHCI host controller is 11834d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1184c609719bSwdenk CONFIG_USB_UHCI to enable it. 1185c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 118630d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1187c609719bSwdenk storage devices. 1188c609719bSwdenk Note: 1189c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1190c609719bSwdenk (TEAC FD-05PUB). 11914d13cbadSwdenk MPC5200 USB requires additional defines: 11924d13cbadSwdenk CONFIG_USB_CLOCK 11934d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1194307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1195307ecb6dSEric Millbrandt for USB on PSC3 11964d13cbadSwdenk CONFIG_USB_CONFIG 11974d13cbadSwdenk for differential drivers: 0x00001000 11984d13cbadSwdenk for single ended drivers: 0x00005000 1199307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1200307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 12016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1202fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1203fdcfaa1bSZhang Wei instead of using asynchronous interrupts 12044d13cbadSwdenk 12059ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 12069ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 12079ab4ce22SSimon Glass 120816c8d5e7SWolfgang Denk- USB Device: 120916c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 121016c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 121116c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 121211ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 121316c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 121416c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 121516c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 121616c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 121716c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 121816c8d5e7SWolfgang Denk a Linux host by 121916c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 122016c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 122116c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 122216c8d5e7SWolfgang Denk might be defined in YourBoardName.h 122316c8d5e7SWolfgang Denk 122416c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 122516c8d5e7SWolfgang Denk Define this to build a UDC device 122616c8d5e7SWolfgang Denk 122716c8d5e7SWolfgang Denk CONFIG_USB_TTY 122816c8d5e7SWolfgang Denk Define this to have a tty type of device available to 122916c8d5e7SWolfgang Denk talk to the UDC device 123016c8d5e7SWolfgang Denk 1231f9da0f89SVipin KUMAR CONFIG_USBD_HS 1232f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1233f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1234f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1235f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1236f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1237f9da0f89SVipin KUMAR speed. 1238f9da0f89SVipin KUMAR 12396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 124016c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 124116c8d5e7SWolfgang Denk be set to usbtty. 124216c8d5e7SWolfgang Denk 124316c8d5e7SWolfgang Denk mpc8xx: 12446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 124516c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 12466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 124716c8d5e7SWolfgang Denk 12486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 124916c8d5e7SWolfgang Denk Derive USB clock from brgclk 12506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 125116c8d5e7SWolfgang Denk 125216c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 125316c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 125416c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 125516c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 125616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 125716c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 125816c8d5e7SWolfgang Denk 125916c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 126016c8d5e7SWolfgang Denk Define this string as the name of your company for 126116c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 126216c8d5e7SWolfgang Denk 126316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 126416c8d5e7SWolfgang Denk Define this string as the name of your product 126516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 126616c8d5e7SWolfgang Denk 126716c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 126816c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 126916c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 127016c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 127116c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 127216c8d5e7SWolfgang Denk 127316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 127416c8d5e7SWolfgang Denk Define this as the unique Product ID 127516c8d5e7SWolfgang Denk for your device 127616c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1277c609719bSwdenk 1278d70a560fSIgor Grinberg- ULPI Layer Support: 1279d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1280d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1281d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1282d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1283d70a560fSIgor Grinberg viewport is supported. 1284d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1285d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 12866d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 12876d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 12886d365ea0SLucas Stach the appropriate value in Hz. 1289c609719bSwdenk 1290c609719bSwdenk- MMC Support: 1291c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1292c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1293c609719bSwdenk accessed from the boot prompt by mapping the device 1294c609719bSwdenk to physical memory similar to flash. Command line is 1295602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1296602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1297c609719bSwdenk 1298afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1299afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1300afb35666SYoshihiro Shimoda 1301afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1302afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1303afb35666SYoshihiro Shimoda 1304afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1305afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1306afb35666SYoshihiro Shimoda 13076705d81eSwdenk- Journaling Flash filesystem support: 13086705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 13096705d81eSwdenk CONFIG_JFFS2_NAND_DEV 13106705d81eSwdenk Define these for a default partition on a NAND device 13116705d81eSwdenk 13126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 13136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 13146705d81eSwdenk Define these for a default partition on a NOR device 13156705d81eSwdenk 13166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 13176705d81eSwdenk Define this to create an own partition. You have to provide a 13186705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 13196705d81eSwdenk 13206705d81eSwdenk If you define only one JFFS2 partition you may also want to 13216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 13226705d81eSwdenk to disable the command chpart. This is the default when you 13236705d81eSwdenk have not defined a custom partition 13246705d81eSwdenk 1325c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1326c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1327656f4c65SDonggeun Kim 1328656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1329656f4c65SDonggeun Kim file in FAT formatted partition. 1330656f4c65SDonggeun Kim 1331656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1332656f4c65SDonggeun Kim user to write files to FAT. 1333c30a15e5SDonggeun Kim 133484cd9327SGabe BlackCBFS (Coreboot Filesystem) support 133584cd9327SGabe Black CONFIG_CMD_CBFS 133684cd9327SGabe Black 133784cd9327SGabe Black Define this to enable support for reading from a Coreboot 133884cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 133984cd9327SGabe Black and cbfsload. 134084cd9327SGabe Black 1341c609719bSwdenk- Keyboard Support: 1342c609719bSwdenk CONFIG_ISA_KEYBOARD 1343c609719bSwdenk 1344c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1345c609719bSwdenk support 1346c609719bSwdenk 1347c609719bSwdenk CONFIG_I8042_KBD 1348c609719bSwdenk Standard PC keyboard driver with US (is default) and 1349c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1350c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1351c609719bSwdenk for cfb_console. Supports cursor blinking. 1352c609719bSwdenk 1353c609719bSwdenk- Video support: 1354c609719bSwdenk CONFIG_VIDEO 1355c609719bSwdenk 1356c609719bSwdenk Define this to enable video support (for output to 1357c609719bSwdenk video). 1358c609719bSwdenk 1359c609719bSwdenk CONFIG_VIDEO_CT69000 1360c609719bSwdenk 1361c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1362c609719bSwdenk 1363c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1364eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1365eeb1b77bSwdenk video output is selected via environment 'videoout' 1366eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1367eeb1b77bSwdenk assumed. 1368c609719bSwdenk 1369eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 137011ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1371eeb1b77bSwdenk are possible: 1372eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1373eeb1b77bSwdenk Following standard modes are supported (* is default): 1374eeb1b77bSwdenk 1375eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1376eeb1b77bSwdenk -------------+--------------------------------------------- 1377eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1378eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1379eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1380eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1381eeb1b77bSwdenk -------------+--------------------------------------------- 1382c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1383c609719bSwdenk 1384eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 13857817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1386eeb1b77bSwdenk 1387eeb1b77bSwdenk 1388a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1389a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1390a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1391a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1392a6c7ad2fSwdenk 13937d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 13947d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 13957d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 13967d3053fbSTimur Tabi support, and should also define these other macros: 13977d3053fbSTimur Tabi 13987d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 13997d3053fbSTimur Tabi CONFIG_VIDEO 14007d3053fbSTimur Tabi CONFIG_CMD_BMP 14017d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 14027d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 14037d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 14047d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 14057d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 14067d3053fbSTimur Tabi 1407ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1408ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1409ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1410ba8e76bdSTimur Tabi description of this variable. 14117d3053fbSTimur Tabi 1412682011ffSwdenk- Keyboard Support: 1413682011ffSwdenk CONFIG_KEYBOARD 1414682011ffSwdenk 1415682011ffSwdenk Define this to enable a custom keyboard support. 1416682011ffSwdenk This simply calls drv_keyboard_init() which must be 1417682011ffSwdenk defined in your board-specific files. 1418682011ffSwdenk The only board using this so far is RBC823. 1419a6c7ad2fSwdenk 1420c609719bSwdenk- LCD Support: CONFIG_LCD 1421c609719bSwdenk 1422c609719bSwdenk Define this to enable LCD support (for output to LCD 1423c609719bSwdenk display); also select one of the supported displays 1424c609719bSwdenk by defining one of these: 1425c609719bSwdenk 142639cf4804SStelian Pop CONFIG_ATMEL_LCD: 142739cf4804SStelian Pop 142839cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 142939cf4804SStelian Pop 1430fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1431c609719bSwdenk 1432fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1433c609719bSwdenk 1434fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1435c609719bSwdenk 1436fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1437fd3103bbSwdenk Active, color, single scan. 1438fd3103bbSwdenk 1439fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1440fd3103bbSwdenk 1441fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1442c609719bSwdenk Active, color, single scan. 1443c609719bSwdenk 1444c609719bSwdenk CONFIG_SHARP_16x9 1445c609719bSwdenk 1446c609719bSwdenk Sharp 320x240. Active, color, single scan. 1447c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1448c609719bSwdenk 1449c609719bSwdenk CONFIG_SHARP_LQ64D341 1450c609719bSwdenk 1451c609719bSwdenk Sharp LQ64D341 display, 640x480. 1452c609719bSwdenk Active, color, single scan. 1453c609719bSwdenk 1454c609719bSwdenk CONFIG_HLD1045 1455c609719bSwdenk 1456c609719bSwdenk HLD1045 display, 640x480. 1457c609719bSwdenk Active, color, single scan. 1458c609719bSwdenk 1459c609719bSwdenk CONFIG_OPTREX_BW 1460c609719bSwdenk 1461c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1462c609719bSwdenk or 1463c609719bSwdenk Hitachi LMG6912RPFC-00T 1464c609719bSwdenk or 1465c609719bSwdenk Hitachi SP14Q002 1466c609719bSwdenk 1467c609719bSwdenk 320x240. Black & white. 1468c609719bSwdenk 1469c609719bSwdenk Normally display is black on white background; define 14706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1471c609719bSwdenk 1472676d319eSSimon Glass 1473676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1474676d319eSSimon Glass 1475676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1476676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1477676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1478676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1479676d319eSSimon Glass a per-section basis. 1480676d319eSSimon Glass 1481*0d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 1482*0d89efefSSimon Glass 1483*0d89efefSSimon Glass When the console need to be scrolled, this is the number of 1484*0d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 1485*0d89efefSSimon Glass the console jump but can help speed up operation when scrolling 1486*0d89efefSSimon Glass is slow. 1487676d319eSSimon Glass 14887152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1489d791b1dcSwdenk 1490d791b1dcSwdenk If this option is set, the environment is checked for 1491d791b1dcSwdenk a variable "splashimage". If found, the usual display 1492d791b1dcSwdenk of logo, copyright and system information on the LCD 1493e94d2cd9Swdenk is suppressed and the BMP image at the address 1494d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1495d791b1dcSwdenk console is redirected to the "nulldev", too. This 1496d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1497d791b1dcSwdenk loaded very quickly after power-on. 1498d791b1dcSwdenk 14991ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 15001ca298ceSMatthias Weisser 15011ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 15021ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 15031ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 15041ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 15051ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 15061ca298ceSMatthias Weisser specify 'm' for centering the image. 15071ca298ceSMatthias Weisser 15081ca298ceSMatthias Weisser Example: 15091ca298ceSMatthias Weisser setenv splashpos m,m 15101ca298ceSMatthias Weisser => image at center of screen 15111ca298ceSMatthias Weisser 15121ca298ceSMatthias Weisser setenv splashpos 30,20 15131ca298ceSMatthias Weisser => image at x = 30 and y = 20 15141ca298ceSMatthias Weisser 15151ca298ceSMatthias Weisser setenv splashpos -10,m 15161ca298ceSMatthias Weisser => vertically centered image 15171ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 15181ca298ceSMatthias Weisser 151998f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 152098f4a3dfSStefan Roese 152198f4a3dfSStefan Roese If this option is set, additionally to standard BMP 152298f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 152398f4a3dfSStefan Roese splashscreen support or the bmp command. 152498f4a3dfSStefan Roese 1525d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1526d5011762SAnatolij Gustschin 1527d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1528d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1529d5011762SAnatolij Gustschin bmp command. 1530d5011762SAnatolij Gustschin 1531f2b96dfbSLei Wen- Do compresssing for memory range: 1532f2b96dfbSLei Wen CONFIG_CMD_ZIP 1533f2b96dfbSLei Wen 1534f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1535f2b96dfbSLei Wen to compress the specified memory at its best effort. 1536f2b96dfbSLei Wen 1537c29fdfc1Swdenk- Compression support: 1538c29fdfc1Swdenk CONFIG_BZIP2 1539c29fdfc1Swdenk 1540c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1541c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1542c29fdfc1Swdenk compressed images are supported. 1543c29fdfc1Swdenk 1544c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 15456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1546c29fdfc1Swdenk be at least 4MB. 1547d791b1dcSwdenk 1548fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1549fc9c1727SLuigi 'Comio' Mantellini 1550fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1551fc9c1727SLuigi 'Comio' Mantellini images is included. 1552fc9c1727SLuigi 'Comio' Mantellini 1553fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1554fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1555fc9c1727SLuigi 'Comio' Mantellini formula: 1556fc9c1727SLuigi 'Comio' Mantellini 1557fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1558fc9c1727SLuigi 'Comio' Mantellini 1559fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1560fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1561fc9c1727SLuigi 'Comio' Mantellini 1562fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1563fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1564fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1565fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1566fc9c1727SLuigi 'Comio' Mantellini 1567fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1568fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 15696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1570fc9c1727SLuigi 'Comio' Mantellini 157117ea1177Swdenk- MII/PHY support: 157217ea1177Swdenk CONFIG_PHY_ADDR 157317ea1177Swdenk 157417ea1177Swdenk The address of PHY on MII bus. 157517ea1177Swdenk 157617ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 157717ea1177Swdenk 157817ea1177Swdenk The clock frequency of the MII bus 157917ea1177Swdenk 158017ea1177Swdenk CONFIG_PHY_GIGE 158117ea1177Swdenk 158217ea1177Swdenk If this option is set, support for speed/duplex 158311ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 158417ea1177Swdenk 158517ea1177Swdenk CONFIG_PHY_RESET_DELAY 158617ea1177Swdenk 158717ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 158817ea1177Swdenk reset before any MII register access is possible. 158917ea1177Swdenk For such PHY, set this option to the usec delay 159017ea1177Swdenk required. (minimum 300usec for LXT971A) 159117ea1177Swdenk 159217ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 159317ea1177Swdenk 159417ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 159517ea1177Swdenk command issued before MII status register can be read 159617ea1177Swdenk 1597c609719bSwdenk- Ethernet address: 1598c609719bSwdenk CONFIG_ETHADDR 1599c68a05feSrichardretanubun CONFIG_ETH1ADDR 1600c609719bSwdenk CONFIG_ETH2ADDR 1601c609719bSwdenk CONFIG_ETH3ADDR 1602c68a05feSrichardretanubun CONFIG_ETH4ADDR 1603c68a05feSrichardretanubun CONFIG_ETH5ADDR 1604c609719bSwdenk 160511ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 160611ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1607c609719bSwdenk is not determined automatically. 1608c609719bSwdenk 1609c609719bSwdenk- IP address: 1610c609719bSwdenk CONFIG_IPADDR 1611c609719bSwdenk 1612c609719bSwdenk Define a default value for the IP address to use for 161311ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1614c609719bSwdenk determined through e.g. bootp. 16151ebcd654SWolfgang Denk (Environment variable "ipaddr") 1616c609719bSwdenk 1617c609719bSwdenk- Server IP address: 1618c609719bSwdenk CONFIG_SERVERIP 1619c609719bSwdenk 1620c609719bSwdenk Defines a default value for the IP address of a TFTP 1621c609719bSwdenk server to contact when using the "tftboot" command. 16221ebcd654SWolfgang Denk (Environment variable "serverip") 1623c609719bSwdenk 162497cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 162597cfe861SRobin Getz 162697cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 162797cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 162897cfe861SRobin Getz 16291ebcd654SWolfgang Denk- Gateway IP address: 16301ebcd654SWolfgang Denk CONFIG_GATEWAYIP 16311ebcd654SWolfgang Denk 16321ebcd654SWolfgang Denk Defines a default value for the IP address of the 16331ebcd654SWolfgang Denk default router where packets to other networks are 16341ebcd654SWolfgang Denk sent to. 16351ebcd654SWolfgang Denk (Environment variable "gatewayip") 16361ebcd654SWolfgang Denk 16371ebcd654SWolfgang Denk- Subnet mask: 16381ebcd654SWolfgang Denk CONFIG_NETMASK 16391ebcd654SWolfgang Denk 16401ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 16411ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 16421ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 16431ebcd654SWolfgang Denk forwarded through a router. 16441ebcd654SWolfgang Denk (Environment variable "netmask") 16451ebcd654SWolfgang Denk 164653a5c424SDavid Updegraff- Multicast TFTP Mode: 164753a5c424SDavid Updegraff CONFIG_MCAST_TFTP 164853a5c424SDavid Updegraff 164953a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 165053a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 165111ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 165253a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 165353a5c424SDavid Updegraff multicast group. 165453a5c424SDavid Updegraff 1655c609719bSwdenk- BOOTP Recovery Mode: 1656c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1657c609719bSwdenk 1658c609719bSwdenk If you have many targets in a network that try to 1659c609719bSwdenk boot using BOOTP, you may want to avoid that all 1660c609719bSwdenk systems send out BOOTP requests at precisely the same 1661c609719bSwdenk moment (which would happen for instance at recovery 1662c609719bSwdenk from a power failure, when all systems will try to 1663c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1664c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1665c609719bSwdenk inserted before sending out BOOTP requests. The 16666c33c785SWolfgang Denk following delays are inserted then: 1667c609719bSwdenk 1668c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1669c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1670c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1671c609719bSwdenk 4th and following 1672c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1673c609719bSwdenk 1674fe389a82Sstroese- DHCP Advanced Options: 16751fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 16761fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1677fe389a82Sstroese 16781fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 16791fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 16801fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 16811fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 16821fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 16831fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 16841fe80d79SJon Loeliger CONFIG_BOOTP_DNS 16851fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 16861fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 16871fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 16881fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 16891fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 16902c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1691fe389a82Sstroese 16925d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 16935d110f0aSWilson Callan environment variable, not the BOOTP server. 1694fe389a82Sstroese 16952c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 16962c00e099SJoe Hershberger after the configured retry count, the call will fail 16972c00e099SJoe Hershberger instead of starting over. This can be used to fail over 16982c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 16992c00e099SJoe Hershberger is not available. 17002c00e099SJoe Hershberger 1701fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1702fe389a82Sstroese serverip from a DHCP server, it is possible that more 1703fe389a82Sstroese than one DNS serverip is offered to the client. 1704fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1705fe389a82Sstroese serverip will be stored in the additional environment 1706fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1707fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 17081fe80d79SJon Loeliger is defined. 1709fe389a82Sstroese 1710fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1711fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1712fe389a82Sstroese need the hostname of the DHCP requester. 17135d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 17141fe80d79SJon Loeliger of the "hostname" environment variable is passed as 17151fe80d79SJon Loeliger option 12 to the DHCP server. 1716fe389a82Sstroese 1717d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1718d9a2f416SAras Vaichas 1719d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1720d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1721d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1722d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1723d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1724d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1725d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1726d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1727d9a2f416SAras Vaichas that one of the retries will be successful but note that 1728d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1729d9a2f416SAras Vaichas this delay. 1730d9a2f416SAras Vaichas 1731d22c338eSJoe Hershberger - Link-local IP address negotiation: 1732d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1733d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1734d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1735d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1736d22c338eSJoe Hershberger 1737d22c338eSJoe Hershberger See doc/README.link-local for more information. 1738d22c338eSJoe Hershberger 1739a3d991bdSwdenk - CDP Options: 1740a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1741a3d991bdSwdenk 1742a3d991bdSwdenk The device id used in CDP trigger frames. 1743a3d991bdSwdenk 1744a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1745a3d991bdSwdenk 1746a3d991bdSwdenk A two character string which is prefixed to the MAC address 1747a3d991bdSwdenk of the device. 1748a3d991bdSwdenk 1749a3d991bdSwdenk CONFIG_CDP_PORT_ID 1750a3d991bdSwdenk 1751a3d991bdSwdenk A printf format string which contains the ascii name of 1752a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 175311ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1754a3d991bdSwdenk 1755a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1756a3d991bdSwdenk 1757a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1758a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1759a3d991bdSwdenk 1760a3d991bdSwdenk CONFIG_CDP_VERSION 1761a3d991bdSwdenk 1762a3d991bdSwdenk An ascii string containing the version of the software. 1763a3d991bdSwdenk 1764a3d991bdSwdenk CONFIG_CDP_PLATFORM 1765a3d991bdSwdenk 1766a3d991bdSwdenk An ascii string containing the name of the platform. 1767a3d991bdSwdenk 1768a3d991bdSwdenk CONFIG_CDP_TRIGGER 1769a3d991bdSwdenk 1770a3d991bdSwdenk A 32bit integer sent on the trigger. 1771a3d991bdSwdenk 1772a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1773a3d991bdSwdenk 1774a3d991bdSwdenk A 16bit integer containing the power consumption of the 1775a3d991bdSwdenk device in .1 of milliwatts. 1776a3d991bdSwdenk 1777a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1778a3d991bdSwdenk 1779a3d991bdSwdenk A byte containing the id of the VLAN. 1780a3d991bdSwdenk 1781c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1782c609719bSwdenk 1783c609719bSwdenk Several configurations allow to display the current 1784c609719bSwdenk status using a LED. For instance, the LED will blink 1785c609719bSwdenk fast while running U-Boot code, stop blinking as 1786c609719bSwdenk soon as a reply to a BOOTP request was received, and 1787c609719bSwdenk start blinking slow once the Linux kernel is running 1788c609719bSwdenk (supported by a status LED driver in the Linux 1789c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1790c609719bSwdenk feature in U-Boot. 1791c609719bSwdenk 1792c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1793c609719bSwdenk 1794c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1795c609719bSwdenk on those systems that support this (optional) 1796c609719bSwdenk feature, like the TQM8xxL modules. 1797c609719bSwdenk 1798c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1799c609719bSwdenk 1800b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1801b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 180211ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1803c609719bSwdenk 1804b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1805602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1806b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1807b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1808c609719bSwdenk command line interface. 1809c609719bSwdenk 1810bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1811c609719bSwdenk 1812b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1813b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1814b37c7e5eSwdenk support for I2C. 1815c609719bSwdenk 1816b37c7e5eSwdenk There are several other quantities that must also be 1817b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1818c609719bSwdenk 18196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1820b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 18216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 182211ccc33fSMarcel Ziswiler the CPU's i2c node address). 1823c609719bSwdenk 18248d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1825a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 18268d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 18278d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 18288d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1829b37c7e5eSwdenk 18305da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 18315da71efaSEric Millbrandt 18325da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 18335da71efaSEric Millbrandt chips might think that the current transfer is still 18345da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 18355da71efaSEric Millbrandt commands until the slave device responds. 18365da71efaSEric Millbrandt 1837b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1838b37c7e5eSwdenk 1839b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1840b37c7e5eSwdenk then the following macros need to be defined (examples are 1841b37c7e5eSwdenk from include/configs/lwmon.h): 1842c609719bSwdenk 1843c609719bSwdenk I2C_INIT 1844c609719bSwdenk 1845b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1846c609719bSwdenk controller or configure ports. 1847c609719bSwdenk 1848b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1849b37c7e5eSwdenk 1850c609719bSwdenk I2C_PORT 1851c609719bSwdenk 1852c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1853c609719bSwdenk assumes both bits are on the same port). Valid values 1854c609719bSwdenk are 0..3 for ports A..D. 1855c609719bSwdenk 1856c609719bSwdenk I2C_ACTIVE 1857c609719bSwdenk 1858c609719bSwdenk The code necessary to make the I2C data line active 1859c609719bSwdenk (driven). If the data line is open collector, this 1860c609719bSwdenk define can be null. 1861c609719bSwdenk 1862b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1863b37c7e5eSwdenk 1864c609719bSwdenk I2C_TRISTATE 1865c609719bSwdenk 1866c609719bSwdenk The code necessary to make the I2C data line tri-stated 1867c609719bSwdenk (inactive). If the data line is open collector, this 1868c609719bSwdenk define can be null. 1869c609719bSwdenk 1870b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1871b37c7e5eSwdenk 1872c609719bSwdenk I2C_READ 1873c609719bSwdenk 1874c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1875c609719bSwdenk FALSE if it is low. 1876c609719bSwdenk 1877b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1878b37c7e5eSwdenk 1879c609719bSwdenk I2C_SDA(bit) 1880c609719bSwdenk 1881c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1882c609719bSwdenk is FALSE, it clears it (low). 1883c609719bSwdenk 1884b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1885b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1886b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1887b37c7e5eSwdenk 1888c609719bSwdenk I2C_SCL(bit) 1889c609719bSwdenk 1890c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1891c609719bSwdenk is FALSE, it clears it (low). 1892c609719bSwdenk 1893b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1894b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1895b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1896b37c7e5eSwdenk 1897c609719bSwdenk I2C_DELAY 1898c609719bSwdenk 1899c609719bSwdenk This delay is invoked four times per clock cycle so this 1900c609719bSwdenk controls the rate of data transfer. The data rate thus 1901b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1902b37c7e5eSwdenk like: 1903b37c7e5eSwdenk 1904b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1905c609719bSwdenk 1906793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1907793b5726SMike Frysinger 1908793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1909793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1910793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1911793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1912793b5726SMike Frysinger 1913793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1914793b5726SMike Frysinger the generic GPIO functions. 1915793b5726SMike Frysinger 19166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 191747cd00faSwdenk 191847cd00faSwdenk When a board is reset during an i2c bus transfer 191947cd00faSwdenk chips might think that the current transfer is still 192047cd00faSwdenk in progress. On some boards it is possible to access 192147cd00faSwdenk the i2c SCLK line directly, either by using the 192247cd00faSwdenk processor pin as a GPIO or by having a second pin 192347cd00faSwdenk connected to the bus. If this option is defined a 192447cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 192547cd00faSwdenk is run early in the boot sequence. 192647cd00faSwdenk 192726a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 192826a33504SRichard Retanubun 192926a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 193026a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 193126a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 193226a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 193326a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 193426a33504SRichard Retanubun controller provide such a method. It is called at the end of 193526a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 193626a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 193726a33504SRichard Retanubun 193817ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 193917ea1177Swdenk 194017ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 194117ea1177Swdenk in u-boot bd_info structure based on u-boot environment 194217ea1177Swdenk variable "i2cfast". (see also i2cfast) 194317ea1177Swdenk 1944bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1945bb99ad6dSBen Warren 1946bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1947bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1948bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1949bb99ad6dSBen Warren Note that bus numbering is zero-based. 1950bb99ad6dSBen Warren 19516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1952bb99ad6dSBen Warren 1953bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 19540f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 19550f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 19560f89c54bSPeter Tyser a 1D array of device addresses 1957bb99ad6dSBen Warren 1958bb99ad6dSBen Warren e.g. 1959bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 19606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1961bb99ad6dSBen Warren 1962bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1963bb99ad6dSBen Warren 1964bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 19656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1966bb99ad6dSBen Warren 1967bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1968bb99ad6dSBen Warren 19696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1970be5e6181STimur Tabi 1971be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1972be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1973be5e6181STimur Tabi 19746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 19750dc018ecSStefan Roese 19760dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 19770dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 19780dc018ecSStefan Roese 19796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 19800dc018ecSStefan Roese 19810dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 19820dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 19830dc018ecSStefan Roese 19846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 19859ebbb54fSVictor Gallardo 19869ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 19879ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 19889ebbb54fSVictor Gallardo specified DTT device. 19899ebbb54fSVictor Gallardo 1990be5e6181STimur Tabi CONFIG_FSL_I2C 1991be5e6181STimur Tabi 1992be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 19937817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1994be5e6181STimur Tabi 199567b23a32SHeiko Schocher CONFIG_I2C_MUX 199667b23a32SHeiko Schocher 199767b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 199867b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 199967b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 200067b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 200167b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 200267b23a32SHeiko Schocher the muxes to activate this new "bus". 200367b23a32SHeiko Schocher 200467b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 200567b23a32SHeiko Schocher feature! 200667b23a32SHeiko Schocher 200767b23a32SHeiko Schocher Example: 200867b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 200967b23a32SHeiko Schocher The First mux with address 70 and channel 6 201067b23a32SHeiko Schocher The Second mux with address 71 and channel 4 201167b23a32SHeiko Schocher 201267b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 201367b23a32SHeiko Schocher 201467b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 201567b23a32SHeiko Schocher of I2C Busses with muxes: 201667b23a32SHeiko Schocher 201767b23a32SHeiko Schocher => i2c bus 201867b23a32SHeiko Schocher Busses reached over muxes: 201967b23a32SHeiko Schocher Bus ID: 2 202067b23a32SHeiko Schocher reached over Mux(es): 202167b23a32SHeiko Schocher pca9544a@70 ch: 4 202267b23a32SHeiko Schocher Bus ID: 3 202367b23a32SHeiko Schocher reached over Mux(es): 202467b23a32SHeiko Schocher pca9544a@70 ch: 6 202567b23a32SHeiko Schocher pca9544a@71 ch: 4 202667b23a32SHeiko Schocher => 202767b23a32SHeiko Schocher 202867b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 2029f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 2030f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 203167b23a32SHeiko Schocher the channel 4. 203267b23a32SHeiko Schocher 203367b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 2034f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 203567b23a32SHeiko Schocher the 2 muxes. 203667b23a32SHeiko Schocher 203767b23a32SHeiko Schocher This option is actually implemented for the bitbanging 203867b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 203967b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 204067b23a32SHeiko Schocher to add this option to other architectures. 204167b23a32SHeiko Schocher 20422ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 20432ac6985aSAndrew Dyer 20442ac6985aSAndrew Dyer defining this will force the i2c_read() function in 20452ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 20462ac6985aSAndrew Dyer between writing the address pointer and reading the 20472ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 20482ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 20492ac6985aSAndrew Dyer devices can use either method, but some require one or 20502ac6985aSAndrew Dyer the other. 2051be5e6181STimur Tabi 2052c609719bSwdenk- SPI Support: CONFIG_SPI 2053c609719bSwdenk 2054c609719bSwdenk Enables SPI driver (so far only tested with 2055c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2056c609719bSwdenk D/As on the SACSng board) 2057c609719bSwdenk 20586639562eSYoshihiro Shimoda CONFIG_SH_SPI 20596639562eSYoshihiro Shimoda 20606639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 20616639562eSYoshihiro Shimoda only SH7757 is supported. 20626639562eSYoshihiro Shimoda 2063c609719bSwdenk CONFIG_SPI_X 2064c609719bSwdenk 2065c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2066c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2067c609719bSwdenk 2068c609719bSwdenk CONFIG_SOFT_SPI 2069c609719bSwdenk 2070c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2071c609719bSwdenk using hardware support. This is a general purpose 2072c609719bSwdenk driver that only requires three general I/O port pins 2073c609719bSwdenk (two outputs, one input) to function. If this is 2074c609719bSwdenk defined, the board configuration must define several 2075c609719bSwdenk SPI configuration items (port pins to use, etc). For 2076c609719bSwdenk an example, see include/configs/sacsng.h. 2077c609719bSwdenk 207804a9e118SBen Warren CONFIG_HARD_SPI 207904a9e118SBen Warren 208004a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 208104a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 208204a9e118SBen Warren must define a list of chip-select function pointers. 208304a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 208404a9e118SBen Warren example, see include/configs/mpc8349emds.h. 208504a9e118SBen Warren 208638254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 208738254f45SGuennadi Liakhovetski 208838254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 20892e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 209038254f45SGuennadi Liakhovetski 20910133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 20920133502eSMatthias Fuchs 20930133502eSMatthias Fuchs Enables FPGA subsystem. 20940133502eSMatthias Fuchs 20950133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 20960133502eSMatthias Fuchs 20970133502eSMatthias Fuchs Enables support for specific chip vendors. 20980133502eSMatthias Fuchs (ALTERA, XILINX) 20990133502eSMatthias Fuchs 21000133502eSMatthias Fuchs CONFIG_FPGA_<family> 21010133502eSMatthias Fuchs 21020133502eSMatthias Fuchs Enables support for FPGA family. 21030133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 21040133502eSMatthias Fuchs 21050133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2106c609719bSwdenk 2107c609719bSwdenk Specify the number of FPGA devices to support. 2108c609719bSwdenk 21096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2110c609719bSwdenk 2111c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2112c609719bSwdenk 21136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2114c609719bSwdenk 2115c609719bSwdenk Enable checks on FPGA configuration interface busy 2116c609719bSwdenk status by the configuration function. This option 2117c609719bSwdenk will require a board or device specific function to 2118c609719bSwdenk be written. 2119c609719bSwdenk 2120c609719bSwdenk CONFIG_FPGA_DELAY 2121c609719bSwdenk 2122c609719bSwdenk If defined, a function that provides delays in the FPGA 2123c609719bSwdenk configuration driver. 2124c609719bSwdenk 21256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2126c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2127c609719bSwdenk 21286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2129c609719bSwdenk 2130c609719bSwdenk Check for configuration errors during FPGA bitfile 2131c609719bSwdenk loading. For example, abort during Virtex II 2132c609719bSwdenk configuration if the INIT_B line goes low (which 2133c609719bSwdenk indicated a CRC error). 2134c609719bSwdenk 21356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2136c609719bSwdenk 2137c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2138c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2139c609719bSwdenk FPGA configuration sequence. The default time is 500 214011ccc33fSMarcel Ziswiler ms. 2141c609719bSwdenk 21426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2143c609719bSwdenk 2144c609719bSwdenk Maximum time to wait for BUSY to deassert during 214511ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2146c609719bSwdenk 21476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2148c609719bSwdenk 2149c609719bSwdenk Time to wait after FPGA configuration. The default is 215011ccc33fSMarcel Ziswiler 200 ms. 2151c609719bSwdenk 2152c609719bSwdenk- Configuration Management: 2153c609719bSwdenk CONFIG_IDENT_STRING 2154c609719bSwdenk 2155c609719bSwdenk If defined, this string will be added to the U-Boot 2156c609719bSwdenk version information (U_BOOT_VERSION) 2157c609719bSwdenk 2158c609719bSwdenk- Vendor Parameter Protection: 2159c609719bSwdenk 2160c609719bSwdenk U-Boot considers the values of the environment 2161c609719bSwdenk variables "serial#" (Board Serial Number) and 21627152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2163c609719bSwdenk are set once by the board vendor / manufacturer, and 2164c609719bSwdenk protects these variables from casual modification by 2165c609719bSwdenk the user. Once set, these variables are read-only, 2166c609719bSwdenk and write or delete attempts are rejected. You can 216711ccc33fSMarcel Ziswiler change this behaviour: 2168c609719bSwdenk 2169c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2170c609719bSwdenk file, the write protection for vendor parameters is 217147cd00faSwdenk completely disabled. Anybody can change or delete 2172c609719bSwdenk these parameters. 2173c609719bSwdenk 2174c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2175c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 217611ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2177c609719bSwdenk which can be changed exactly ONCE by the user. [The 2178c609719bSwdenk serial# is unaffected by this, i. e. it remains 2179c609719bSwdenk read-only.] 2180c609719bSwdenk 2181c609719bSwdenk- Protected RAM: 2182c609719bSwdenk CONFIG_PRAM 2183c609719bSwdenk 2184c609719bSwdenk Define this variable to enable the reservation of 2185c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2186c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2187c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2188c609719bSwdenk this default value by defining an environment 2189c609719bSwdenk variable "pram" to the number of kB you want to 2190c609719bSwdenk reserve. Note that the board info structure will 2191c609719bSwdenk still show the full amount of RAM. If pRAM is 2192c609719bSwdenk reserved, a new environment variable "mem" will 2193c609719bSwdenk automatically be defined to hold the amount of 2194c609719bSwdenk remaining RAM in a form that can be passed as boot 2195c609719bSwdenk argument to Linux, for instance like that: 2196c609719bSwdenk 2197fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2198c609719bSwdenk saveenv 2199c609719bSwdenk 2200c609719bSwdenk This way you can tell Linux not to use this memory, 2201c609719bSwdenk either, which results in a memory region that will 2202c609719bSwdenk not be affected by reboots. 2203c609719bSwdenk 2204c609719bSwdenk *WARNING* If your board configuration uses automatic 2205c609719bSwdenk detection of the RAM size, you must make sure that 2206c609719bSwdenk this memory test is non-destructive. So far, the 2207c609719bSwdenk following board configurations are known to be 2208c609719bSwdenk "pRAM-clean": 2209c609719bSwdenk 22101b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 22111b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2212544d97e9SWolfgang Denk FLAGADM, TQM8260 2213c609719bSwdenk 2214c609719bSwdenk- Error Recovery: 2215c609719bSwdenk CONFIG_PANIC_HANG 2216c609719bSwdenk 2217c609719bSwdenk Define this variable to stop the system in case of a 2218c609719bSwdenk fatal error, so that you have to reset it manually. 2219c609719bSwdenk This is probably NOT a good idea for an embedded 222011ccc33fSMarcel Ziswiler system where you want the system to reboot 2221c609719bSwdenk automatically as fast as possible, but it may be 2222c609719bSwdenk useful during development since you can try to debug 2223c609719bSwdenk the conditions that lead to the situation. 2224c609719bSwdenk 2225c609719bSwdenk CONFIG_NET_RETRY_COUNT 2226c609719bSwdenk 2227c609719bSwdenk This variable defines the number of retries for 2228c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2229c609719bSwdenk before giving up the operation. If not defined, a 2230c609719bSwdenk default value of 5 is used. 2231c609719bSwdenk 223240cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 223340cb90eeSGuennadi Liakhovetski 223440cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 223540cb90eeSGuennadi Liakhovetski 223648a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 223748a3e999STetsuyuki Kobayashi 223848a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 223948a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 224048a3e999STetsuyuki Kobayashi try longer timeout such as 224148a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 224248a3e999STetsuyuki Kobayashi 2243c609719bSwdenk- Command Interpreter: 22448078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 224504a85b3bSwdenk 224604a85b3bSwdenk Enable auto completion of commands using TAB. 224704a85b3bSwdenk 22488078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 22498078f1a5SWolfgang Denk for the "hush" shell. 22508078f1a5SWolfgang Denk 22518078f1a5SWolfgang Denk 22526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2253c609719bSwdenk 2254c609719bSwdenk Define this variable to enable the "hush" shell (from 2255c609719bSwdenk Busybox) as command line interpreter, thus enabling 2256c609719bSwdenk powerful command line syntax like 2257c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2258c609719bSwdenk constructs ("shell scripts"). 2259c609719bSwdenk 2260c609719bSwdenk If undefined, you get the old, much simpler behaviour 2261c609719bSwdenk with a somewhat smaller memory footprint. 2262c609719bSwdenk 2263c609719bSwdenk 22646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2265c609719bSwdenk 2266c609719bSwdenk This defines the secondary prompt string, which is 2267c609719bSwdenk printed when the command interpreter needs more input 2268c609719bSwdenk to complete a command. Usually "> ". 2269c609719bSwdenk 2270c609719bSwdenk Note: 2271c609719bSwdenk 2272c609719bSwdenk In the current implementation, the local variables 2273c609719bSwdenk space and global environment variables space are 2274c609719bSwdenk separated. Local variables are those you define by 22753b57fe0aSwdenk simply typing `name=value'. To access a local 2276c609719bSwdenk variable later on, you have write `$name' or 22773b57fe0aSwdenk `${name}'; to execute the contents of a variable 22783b57fe0aSwdenk directly type `$name' at the command prompt. 2279c609719bSwdenk 2280c609719bSwdenk Global environment variables are those you use 2281c609719bSwdenk setenv/printenv to work with. To run a command stored 2282c609719bSwdenk in such a variable, you need to use the run command, 2283c609719bSwdenk and you must not use the '$' sign to access them. 2284c609719bSwdenk 2285c609719bSwdenk To store commands and special characters in a 2286c609719bSwdenk variable, please use double quotation marks 2287c609719bSwdenk surrounding the whole text of the variable, instead 2288c609719bSwdenk of the backslashes before semicolons and special 2289c609719bSwdenk symbols. 2290c609719bSwdenk 2291aa0c71acSWolfgang Denk- Commandline Editing and History: 2292aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2293aa0c71acSWolfgang Denk 229411ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2295aa0c71acSWolfgang Denk commandline input operations 2296aa0c71acSWolfgang Denk 2297a8c7c708Swdenk- Default Environment: 2298c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2299c609719bSwdenk 2300c609719bSwdenk Define this to contain any number of null terminated 2301c609719bSwdenk strings (variable = value pairs) that will be part of 23027152b1d0Swdenk the default environment compiled into the boot image. 23032262cfeeSwdenk 2304c609719bSwdenk For example, place something like this in your 2305c609719bSwdenk board's config file: 2306c609719bSwdenk 2307c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2308c609719bSwdenk "myvar1=value1\0" \ 2309c609719bSwdenk "myvar2=value2\0" 2310c609719bSwdenk 2311c609719bSwdenk Warning: This method is based on knowledge about the 2312c609719bSwdenk internal format how the environment is stored by the 23132262cfeeSwdenk U-Boot code. This is NOT an official, exported 2314c609719bSwdenk interface! Although it is unlikely that this format 23157152b1d0Swdenk will change soon, there is no guarantee either. 2316c609719bSwdenk You better know what you are doing here. 2317c609719bSwdenk 2318c609719bSwdenk Note: overly (ab)use of the default environment is 2319c609719bSwdenk discouraged. Make sure to check other ways to preset 232074de7aefSWolfgang Denk the environment like the "source" command or the 2321c609719bSwdenk boot command first. 2322c609719bSwdenk 23235e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 23245e724ca2SStephen Warren 23255e724ca2SStephen Warren Define this in order to add variables describing the 23265e724ca2SStephen Warren U-Boot build configuration to the default environment. 23275e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 23285e724ca2SStephen Warren 23295e724ca2SStephen Warren Enabling this option will cause the following to be defined: 23305e724ca2SStephen Warren 23315e724ca2SStephen Warren - CONFIG_SYS_ARCH 23325e724ca2SStephen Warren - CONFIG_SYS_CPU 23335e724ca2SStephen Warren - CONFIG_SYS_BOARD 23345e724ca2SStephen Warren - CONFIG_SYS_VENDOR 23355e724ca2SStephen Warren - CONFIG_SYS_SOC 23365e724ca2SStephen Warren 23377e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 23387e27f89fSTom Rini 23397e27f89fSTom Rini Define this in order to add variables describing certain 23407e27f89fSTom Rini run-time determined information about the hardware to the 23417e27f89fSTom Rini environment. These will be named board_name, board_rev. 23427e27f89fSTom Rini 2343a8c7c708Swdenk- DataFlash Support: 23442abbe075Swdenk CONFIG_HAS_DATAFLASH 23452abbe075Swdenk 23462abbe075Swdenk Defining this option enables DataFlash features and 23472abbe075Swdenk allows to read/write in Dataflash via the standard 23482abbe075Swdenk commands cp, md... 23492abbe075Swdenk 2350f61ec45eSEric Nelson- Serial Flash support 2351f61ec45eSEric Nelson CONFIG_CMD_SF 2352f61ec45eSEric Nelson 2353f61ec45eSEric Nelson Defining this option enables SPI flash commands 2354f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2355f61ec45eSEric Nelson 2356f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2357f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2358f61ec45eSEric Nelson commands. 2359f61ec45eSEric Nelson 2360f61ec45eSEric Nelson The following defaults may be provided by the platform 2361f61ec45eSEric Nelson to handle the common case when only a single serial 2362f61ec45eSEric Nelson flash is present on the system. 2363f61ec45eSEric Nelson 2364f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2365f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2366f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2367f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2368f61ec45eSEric Nelson 23693f85ce27Swdenk- SystemACE Support: 23703f85ce27Swdenk CONFIG_SYSTEMACE 23713f85ce27Swdenk 23723f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 23733f85ce27Swdenk chips attached via some sort of local bus. The address 237411ccc33fSMarcel Ziswiler of the chip must also be defined in the 23756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 23763f85ce27Swdenk 23773f85ce27Swdenk #define CONFIG_SYSTEMACE 23786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 23793f85ce27Swdenk 23803f85ce27Swdenk When SystemACE support is added, the "ace" device type 23813f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 23823f85ce27Swdenk 2383ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2384ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2385ecb0ccd9SWolfgang Denk 238628cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2387ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 238828cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2389ecb0ccd9SWolfgang Denk number generator is used. 2390ecb0ccd9SWolfgang Denk 239128cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 239228cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 239328cb9375SWolfgang Denk defined, the normal port 69 is used. 239428cb9375SWolfgang Denk 239528cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2396ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2397ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2398ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2399ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2400ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2401ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2402ecb0ccd9SWolfgang Denk 2403a8c7c708Swdenk- Show boot progress: 2404c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2405c609719bSwdenk 2406c609719bSwdenk Defining this option allows to add some board- 2407c609719bSwdenk specific code (calling a user-provided function 2408c609719bSwdenk "show_boot_progress(int)") that enables you to show 2409c609719bSwdenk the system's boot progress on some display (for 2410c609719bSwdenk example, some LED's) on your board. At the moment, 2411c609719bSwdenk the following checkpoints are implemented: 2412c609719bSwdenk 24133a608ca0SSimon Glass- Detailed boot stage timing 24143a608ca0SSimon Glass CONFIG_BOOTSTAGE 24153a608ca0SSimon Glass Define this option to get detailed timing of each stage 24163a608ca0SSimon Glass of the boot process. 24173a608ca0SSimon Glass 24183a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 24193a608ca0SSimon Glass This is the number of available user bootstage records. 24203a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 24213a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 24223a608ca0SSimon Glass the limit, recording will stop. 24233a608ca0SSimon Glass 24243a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 24253a608ca0SSimon Glass Define this to print a report before boot, similar to this: 24263a608ca0SSimon Glass 24273a608ca0SSimon Glass Timer summary in microseconds: 24283a608ca0SSimon Glass Mark Elapsed Stage 24293a608ca0SSimon Glass 0 0 reset 24303a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 24313a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 24323a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 24333a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 24343a608ca0SSimon Glass 3,910,375 250,777 main_loop 24353a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 24363a608ca0SSimon Glass 30,361,327 445,160 start_kernel 24373a608ca0SSimon Glass 24382eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 24392eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 24402eba38cfSSimon Glass and un/stashing of bootstage data. 24412eba38cfSSimon Glass 244294fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 244394fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 244494fd1316SSimon Glass node is created with each bootstage id as a child. Each child 244594fd1316SSimon Glass has a 'name' property and either 'mark' containing the 244694fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 244794fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 244894fd1316SSimon Glass For example: 244994fd1316SSimon Glass 245094fd1316SSimon Glass bootstage { 245194fd1316SSimon Glass 154 { 245294fd1316SSimon Glass name = "board_init_f"; 245394fd1316SSimon Glass mark = <3575678>; 245494fd1316SSimon Glass }; 245594fd1316SSimon Glass 170 { 245694fd1316SSimon Glass name = "lcd"; 245794fd1316SSimon Glass accum = <33482>; 245894fd1316SSimon Glass }; 245994fd1316SSimon Glass }; 246094fd1316SSimon Glass 246194fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 246294fd1316SSimon Glass 24631372cce2SMarian BalakowiczLegacy uImage format: 24641372cce2SMarian Balakowicz 2465c609719bSwdenk Arg Where When 2466c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2467c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2468c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2469c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2470c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2471c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2472c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2473c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2474c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 24751372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2476c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2477c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2478c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2479c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 24801372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2481c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 24821372cce2SMarian Balakowicz 24831372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 24841372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 24851372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 24861372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 24871372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 24881372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 24891372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 249011ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 24911372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 24921372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 24931372cce2SMarian Balakowicz 2494ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2495c609719bSwdenk 2496a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 249763e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 249863e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 249963e73c9aSwdenk 2500566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2501566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2502566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2503566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2504566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2505566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2506566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2507566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2508566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2509566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2510566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2511566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2512566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2513566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2514566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2515566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2516566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2517566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2518566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2519566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2520566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2521566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2522566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2523566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2524566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2525566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2526566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2527566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2528566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2529566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2530566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2531566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2532566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2533566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2534566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2535566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2536566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2537566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2538566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2539566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2540566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2541566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2542566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2543566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2544566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2545566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2546566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2547c609719bSwdenk 2548566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2549c609719bSwdenk 2550566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2551566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2552566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2553206c60cbSwdenk 2554566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2555566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 255611ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2557566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2558566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2559566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 256074de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 256174de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2562566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2563c609719bSwdenk 25641372cce2SMarian BalakowiczFIT uImage format: 25651372cce2SMarian Balakowicz 25661372cce2SMarian Balakowicz Arg Where When 25671372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 25681372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 25691372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 25701372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 25711372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 25721372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2573f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 25741372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 25751372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 25761372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 25771372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 25781372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 257911ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 258011ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 25811372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 25821372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 25831372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 25841372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 25851372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 25861372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 25871372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 25881372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 25891372cce2SMarian Balakowicz 25901372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 25911372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 25921372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 259311ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 25941372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 25951372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 25961372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 25971372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 25981372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 25991372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 26001372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 26011372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 26021372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 26031372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 26041372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 26051372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 26061372cce2SMarian Balakowicz 260711ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 26081372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 26091372cce2SMarian Balakowicz 261011ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 26111372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 26121372cce2SMarian Balakowicz 261311ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 26141372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 26151372cce2SMarian Balakowicz 26164cf2609bSWolfgang Denk- Standalone program support: 26174cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 26184cf2609bSWolfgang Denk 26196feff899SWolfgang Denk This option defines a board specific value for the 26206feff899SWolfgang Denk address where standalone program gets loaded, thus 26216feff899SWolfgang Denk overwriting the architecture dependent default 26224cf2609bSWolfgang Denk settings. 26234cf2609bSWolfgang Denk 26244cf2609bSWolfgang Denk- Frame Buffer Address: 26254cf2609bSWolfgang Denk CONFIG_FB_ADDR 26264cf2609bSWolfgang Denk 26274cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 26284cf2609bSWolfgang Denk address for frame buffer. 26294cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 26304cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 26316feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 26324cf2609bSWolfgang Denk 26334cf2609bSWolfgang Denk Please see board_init_f function. 26344cf2609bSWolfgang Denk 2635cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2636cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2637cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2638cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2639cccfc2abSDetlev Zundel 2640cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2641cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2642cccfc2abSDetlev Zundel 2643cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2644cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2645cccfc2abSDetlev Zundel 2646cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2647cccfc2abSDetlev Zundel Needed for mtdparts command support. 2648cccfc2abSDetlev Zundel 2649cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2650cccfc2abSDetlev Zundel 2651cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2652cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2653cccfc2abSDetlev Zundel 26546a11cf48SDaniel Schwierzeck- SPL framework 26556a11cf48SDaniel Schwierzeck CONFIG_SPL 26566a11cf48SDaniel Schwierzeck Enable building of SPL globally. 26576a11cf48SDaniel Schwierzeck 265895579793STom Rini CONFIG_SPL_LDSCRIPT 265995579793STom Rini LDSCRIPT for linking the SPL binary. 266095579793STom Rini 266195579793STom Rini CONFIG_SPL_MAX_SIZE 266295579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 266395579793STom Rini 26646a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 26656a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 26666a11cf48SDaniel Schwierzeck 266795579793STom Rini CONFIG_SPL_BSS_START_ADDR 266895579793STom Rini Link address for the BSS within the SPL binary. 266995579793STom Rini 267095579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 267195579793STom Rini Maximum binary size of the BSS section of the SPL binary. 267295579793STom Rini 267395579793STom Rini CONFIG_SPL_STACK 267495579793STom Rini Adress of the start of the stack SPL will use 267595579793STom Rini 267695579793STom Rini CONFIG_SYS_SPL_MALLOC_START 267795579793STom Rini Starting address of the malloc pool used in SPL. 267895579793STom Rini 267995579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 268095579793STom Rini The size of the malloc pool used in SPL. 26816a11cf48SDaniel Schwierzeck 268247f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 268347f7bcaeSTom Rini Enable the SPL framework under common/. This framework 268447f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 268547f7bcaeSTom Rini NAND loading of the Linux Kernel. 268647f7bcaeSTom Rini 2687861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 2688861a86f4STom Rini For ARM, enable an optional function to print more information 2689861a86f4STom Rini about the running system. 2690861a86f4STom Rini 26916a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 26926a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 26936a11cf48SDaniel Schwierzeck 26946a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 26956a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 26966a11cf48SDaniel Schwierzeck 26976a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 26986a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 26996a11cf48SDaniel Schwierzeck 27006a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 27016a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 27026a11cf48SDaniel Schwierzeck 27036a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 27046a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 27056a11cf48SDaniel Schwierzeck 270695579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 270795579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 270895579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 270995579793STom Rini Address, size and partition on the MMC to load U-Boot from 271095579793STom Rini when the MMC is being used in raw mode. 271195579793STom Rini 271295579793STom Rini CONFIG_SPL_FAT_SUPPORT 271395579793STom Rini Support for fs/fat/libfat.o in SPL binary 271495579793STom Rini 271595579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 271695579793STom Rini Filename to read to load U-Boot when reading from FAT 271795579793STom Rini 271895579793STom Rini CONFIG_SPL_NAND_SIMPLE 271995579793STom Rini Support for drivers/mtd/nand/libnand.o in SPL binary 272095579793STom Rini 272195579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 272295579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 272395579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 272495579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 272595579793STom Rini CONFIG_SYS_NAND_ECCBYTES 272695579793STom Rini Defines the size and behavior of the NAND that SPL uses 272795579793STom Rini to read U-Boot with CONFIG_SPL_NAND_SIMPLE 272895579793STom Rini 272995579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 273095579793STom Rini Location in NAND for CONFIG_SPL_NAND_SIMPLE to read U-Boot 273195579793STom Rini from. 273295579793STom Rini 273395579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 273495579793STom Rini Location in memory for CONFIG_SPL_NAND_SIMPLE to load U-Boot 273595579793STom Rini to. 273695579793STom Rini 273795579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 273895579793STom Rini Define this if you need to first read the OOB and then the 273995579793STom Rini data. This is used for example on davinci plattforms. 274095579793STom Rini 274195579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 274295579793STom Rini Support for an OMAP3-specific set of functions to return the 274395579793STom Rini ID and MFR of the first attached NAND chip, if present. 274495579793STom Rini 27456a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 27466a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 27476a11cf48SDaniel Schwierzeck 27486a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 27496a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 27506a11cf48SDaniel Schwierzeck 27516a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 27526a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 27536a11cf48SDaniel Schwierzeck 2754c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 2755c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 2756c57b953dSPavel Machek 27576a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 27586a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 27591372cce2SMarian Balakowicz 2760c609719bSwdenkModem Support: 2761c609719bSwdenk-------------- 2762c609719bSwdenk 2763566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2764c609719bSwdenk 276511ccc33fSMarcel Ziswiler- Modem support enable: 2766c609719bSwdenk CONFIG_MODEM_SUPPORT 2767c609719bSwdenk 2768c609719bSwdenk- RTS/CTS Flow control enable: 2769c609719bSwdenk CONFIG_HWFLOW 2770c609719bSwdenk 2771c609719bSwdenk- Modem debug support: 2772c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2773c609719bSwdenk 2774c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2775c609719bSwdenk for modem support. Useful only with BDI2000. 2776c609719bSwdenk 2777a8c7c708Swdenk- Interrupt support (PPC): 2778a8c7c708Swdenk 2779a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2780a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 278111ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2782a8c7c708Swdenk should set decrementer_count to appropriate value. If 278311ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2784a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 278511ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2786a8c7c708Swdenk specific handling. If board has watchdog / status_led 2787a8c7c708Swdenk / other_activity_monitor it works automatically from 2788a8c7c708Swdenk general timer_interrupt(). 2789a8c7c708Swdenk 2790c609719bSwdenk- General: 2791c609719bSwdenk 2792c609719bSwdenk In the target system modem support is enabled when a 2793c609719bSwdenk specific key (key combination) is pressed during 2794c609719bSwdenk power-on. Otherwise U-Boot will boot normally 279511ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2796c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2797c609719bSwdenk function, returning 1 and thus enabling modem 2798c609719bSwdenk initialization. 2799c609719bSwdenk 2800c609719bSwdenk If there are no modem init strings in the 2801c609719bSwdenk environment, U-Boot proceed to autoboot; the 2802c609719bSwdenk previous output (banner, info printfs) will be 280311ccc33fSMarcel Ziswiler suppressed, though. 2804c609719bSwdenk 2805c609719bSwdenk See also: doc/README.Modem 2806c609719bSwdenk 28079660e442SHelmut RaigerBoard initialization settings: 28089660e442SHelmut Raiger------------------------------ 28099660e442SHelmut Raiger 28109660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 28119660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 28129660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 28139660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 28149660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 28159660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 28169660e442SHelmut Raiger 28179660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 28189660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 28199660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 28209660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2821c609719bSwdenk 2822c609719bSwdenkConfiguration Settings: 2823c609719bSwdenk----------------------- 2824c609719bSwdenk 28256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2826c609719bSwdenk undefine this when you're short of memory. 2827c609719bSwdenk 28282fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 28292fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 28302fb2604dSPeter Tyser 28316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2832c609719bSwdenk prompt for user input. 2833c609719bSwdenk 28346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2835c609719bSwdenk 28366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2837c609719bSwdenk 28386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2839c609719bSwdenk 28406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2841c609719bSwdenk the application (usually a Linux kernel) when it is 2842c609719bSwdenk booted 2843c609719bSwdenk 28446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2845c609719bSwdenk List of legal baudrate settings for this board. 2846c609719bSwdenk 28476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2848c609719bSwdenk Suppress display of console information at boot. 2849c609719bSwdenk 28506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2851c609719bSwdenk If the board specific function 2852c609719bSwdenk extern int overwrite_console (void); 2853c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2854c609719bSwdenk serial port, else the settings in the environment are used. 2855c609719bSwdenk 28566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2857c609719bSwdenk Enable the call to overwrite_console(). 2858c609719bSwdenk 28596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2860c609719bSwdenk Enable overwrite of previous console environment settings. 2861c609719bSwdenk 28626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2863c609719bSwdenk Begin and End addresses of the area used by the 2864c609719bSwdenk simple memory test. 2865c609719bSwdenk 28666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2867c609719bSwdenk Enable an alternate, more extensive memory test. 2868c609719bSwdenk 28696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 28705f535fe1Swdenk Scratch address used by the alternate memory test 28715f535fe1Swdenk You only need to set this if address zero isn't writeable 28725f535fe1Swdenk 28736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 28746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 287514f73ca6SStefan Roese this specified memory area will get subtracted from the top 287611ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 287714f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 287814f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 287914f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 28805e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 288114f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 28825e12e75dSStefan Roese will have to get fixed in Linux additionally. 288314f73ca6SStefan Roese 288414f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 288514f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 288614f73ca6SStefan Roese be touched. 288714f73ca6SStefan Roese 288814f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 288914f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 289014f73ca6SStefan Roese then the end address of the Linux memory will be located at a 289114f73ca6SStefan Roese non page size aligned address and this could cause major 289214f73ca6SStefan Roese problems. 289314f73ca6SStefan Roese 28946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2895c609719bSwdenk Default load address for network file downloads 2896c609719bSwdenk 28976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2898c609719bSwdenk Enable temporary baudrate change while serial download 2899c609719bSwdenk 29006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2901c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2902c609719bSwdenk 29036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2904c609719bSwdenk Physical start address of Motherboard I/O (if using a 2905c609719bSwdenk Cogent motherboard) 2906c609719bSwdenk 29076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2908c609719bSwdenk Physical start address of Flash memory. 2909c609719bSwdenk 29106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2911c609719bSwdenk Physical start address of boot monitor code (set by 2912c609719bSwdenk make config files to be same as the text base address 291314d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 29146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2915c609719bSwdenk 29166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 29173b57fe0aSwdenk Size of memory reserved for monitor code, used to 29183b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 29193b57fe0aSwdenk embedded within the U-Boot image, or in a separate 29203b57fe0aSwdenk flash sector. 2921c609719bSwdenk 29226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2923c609719bSwdenk Size of DRAM reserved for malloc() use. 2924c609719bSwdenk 29256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 292615940c9aSStefan Roese Normally compressed uImages are limited to an 292715940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 29286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 292915940c9aSStefan Roese to adjust this setting to your needs. 2930c609719bSwdenk 29316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2932c609719bSwdenk Maximum size of memory mapped by the startup code of 2933c609719bSwdenk the Linux kernel; all data that must be processed by 29347d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 29357d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 29367d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 29377d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2938c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2939c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2940c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2941c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2942c609719bSwdenk 2943fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2944fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2945fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2946fca43cc8SJohn Rigby is enabled. 2947fca43cc8SJohn Rigby 2948fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2949fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2950fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2951fca43cc8SJohn Rigby 2952fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2953fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2954fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2955fca43cc8SJohn Rigby 29566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2957c609719bSwdenk Max number of Flash memory banks 2958c609719bSwdenk 29596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2960c609719bSwdenk Max number of sectors on a Flash chip 2961c609719bSwdenk 29626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2963c609719bSwdenk Timeout for Flash erase operations (in ms) 2964c609719bSwdenk 29656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2966c609719bSwdenk Timeout for Flash write operations (in ms) 2967c609719bSwdenk 29686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 29698564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 29708564acf9Swdenk 29716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 29728564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 29738564acf9Swdenk 29746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 29758564acf9Swdenk If defined, hardware flash sectors protection is used 29768564acf9Swdenk instead of U-Boot software protection. 29778564acf9Swdenk 29786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2979c609719bSwdenk 2980c609719bSwdenk Enable TFTP transfers directly to flash memory; 2981c609719bSwdenk without this option such a download has to be 2982c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2983c609719bSwdenk copy from RAM to flash. 2984c609719bSwdenk 2985c609719bSwdenk The two-step approach is usually more reliable, since 2986c609719bSwdenk you can check if the download worked before you erase 298711ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 298811ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2989c609719bSwdenk downloaded image) this option may be very useful. 2990c609719bSwdenk 29916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2992c609719bSwdenk Define if the flash driver uses extra elements in the 29935653fc33Swdenk common flash structure for storing flash geometry. 29945653fc33Swdenk 299500b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 29965653fc33Swdenk This option also enables the building of the cfi_flash driver 29975653fc33Swdenk in the drivers directory 299853cf9435Sstroese 299991809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 300091809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 300191809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 300291809ed5SPiotr Ziecik to the MTD layer. 300391809ed5SPiotr Ziecik 30046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 300596ef831fSGuennadi Liakhovetski Use buffered writes to flash. 300696ef831fSGuennadi Liakhovetski 300796ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 300896ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 300996ef831fSGuennadi Liakhovetski write commands. 301096ef831fSGuennadi Liakhovetski 30116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 30125568e613SStefan Roese If this option is defined, the common CFI flash doesn't 30135568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 30145568e613SStefan Roese is useful, if some of the configured banks are only 30155568e613SStefan Roese optionally available. 30165568e613SStefan Roese 30179a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 30189a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 30199a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 30209a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 30219a042e9cSJerry Van Baren 30226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 302311ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 302411ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 302553cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 302653cf9435Sstroese buffers can be full shortly after enabling the interface 302711ccc33fSMarcel Ziswiler on high Ethernet traffic. 302853cf9435Sstroese Defaults to 4 if not defined. 3029c609719bSwdenk 3030ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3031ea882bafSWolfgang Denk 3032ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3033ea882bafSWolfgang Denk internally to store the environment settings. The default 3034ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3035ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3036ea882bafSWolfgang Denk lib/hashtable.c for details. 3037ea882bafSWolfgang Denk 3038c609719bSwdenkThe following definitions that deal with the placement and management 3039c609719bSwdenkof environment data (variable area); in general, we support the 3040c609719bSwdenkfollowing configurations: 3041c609719bSwdenk 3042c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3043c3eb3fe4SMike Frysinger 3044c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3045c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3046c3eb3fe4SMike Frysinger 30475a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3048c609719bSwdenk 3049c609719bSwdenk Define this if the environment is in flash memory. 3050c609719bSwdenk 3051c609719bSwdenk a) The environment occupies one whole flash sector, which is 3052c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3053c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3054c609719bSwdenk sector" type flash chips, which have several smaller 3055c609719bSwdenk sectors at the start or the end. For instance, such a 3056c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3057c609719bSwdenk such a case you would place the environment in one of the 3058c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3059c609719bSwdenk "top boot sector" type flash chips, you would put the 3060c609719bSwdenk environment in one of the last sectors, leaving a gap 3061c609719bSwdenk between U-Boot and the environment. 3062c609719bSwdenk 30630e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3064c609719bSwdenk 3065c609719bSwdenk Offset of environment data (variable area) to the 3066c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3067c609719bSwdenk type flash chips the second sector can be used: the offset 3068c609719bSwdenk for this sector is given here. 3069c609719bSwdenk 30706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3071c609719bSwdenk 30720e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3073c609719bSwdenk 3074c609719bSwdenk This is just another way to specify the start address of 3075c609719bSwdenk the flash sector containing the environment (instead of 30760e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3077c609719bSwdenk 30780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3079c609719bSwdenk 3080c609719bSwdenk Size of the sector containing the environment. 3081c609719bSwdenk 3082c609719bSwdenk 3083c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3084c609719bSwdenk In such a case you don't want to spend a whole sector for 3085c609719bSwdenk the environment. 3086c609719bSwdenk 30870e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3088c609719bSwdenk 30895a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 30900e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3091c609719bSwdenk of this flash sector for the environment. This saves 3092c609719bSwdenk memory for the RAM copy of the environment. 3093c609719bSwdenk 3094c609719bSwdenk It may also save flash memory if you decide to use this 3095c609719bSwdenk when your environment is "embedded" within U-Boot code, 3096c609719bSwdenk since then the remainder of the flash sector could be used 3097c609719bSwdenk for U-Boot code. It should be pointed out that this is 3098c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3099c609719bSwdenk updating the environment in flash makes it always 3100c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3101c609719bSwdenk wrong before the contents has been restored from a copy in 3102c609719bSwdenk RAM, your target system will be dead. 3103c609719bSwdenk 31040e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 31050e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3106c609719bSwdenk 3107c609719bSwdenk These settings describe a second storage area used to hold 310811ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 31093e38691eSwdenk a valid backup copy in case there is a power failure during 3110c609719bSwdenk a "saveenv" operation. 3111c609719bSwdenk 3112c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3113c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3114c609719bSwdenkaccordingly! 3115c609719bSwdenk 3116c609719bSwdenk 31179314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3118c609719bSwdenk 3119c609719bSwdenk Define this if you have some non-volatile memory device 3120c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3121c609719bSwdenk environment. 3122c609719bSwdenk 31230e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 31240e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3125c609719bSwdenk 312611ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3127c609719bSwdenk want to use for environment. It is assumed that this memory 3128c609719bSwdenk can just be read and written to, without any special 3129c609719bSwdenk provision. 3130c609719bSwdenk 3131c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3132c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 313311ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3134c609719bSwdenkU-Boot will hang. 3135c609719bSwdenk 3136c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3137c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3138c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3139c609719bSwdenkto save the current settings. 3140c609719bSwdenk 3141c609719bSwdenk 3142bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3143c609719bSwdenk 3144c609719bSwdenk Use this if you have an EEPROM or similar serial access 3145c609719bSwdenk device and a driver for it. 3146c609719bSwdenk 31470e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 31480e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3149c609719bSwdenk 3150c609719bSwdenk These two #defines specify the offset and size of the 3151c609719bSwdenk environment area within the total memory of your EEPROM. 3152c609719bSwdenk 31536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3154c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3155c609719bSwdenk The default address is zero. 3156c609719bSwdenk 31576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3158c609719bSwdenk If defined, the number of bits used to address bytes in a 3159c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3160c609719bSwdenk would require six bits. 3161c609719bSwdenk 31626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3163c609719bSwdenk If defined, the number of milliseconds to delay between 3164c609719bSwdenk page writes. The default is zero milliseconds. 3165c609719bSwdenk 31666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3167c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3168c609719bSwdenk that this is NOT the chip address length! 3169c609719bSwdenk 31706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 31715cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 31725cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 31735cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 31745cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 31755cf91d6bSwdenk byte chips. 31765cf91d6bSwdenk 31775cf91d6bSwdenk Note that we consider the length of the address field to 31785cf91d6bSwdenk still be one byte because the extra address bits are hidden 31795cf91d6bSwdenk in the chip address. 31805cf91d6bSwdenk 31816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3182c609719bSwdenk The size in bytes of the EEPROM device. 3183c609719bSwdenk 3184548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3185548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3186548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3187548738b4SHeiko Schocher 3188548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3189548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3190548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3191548738b4SHeiko Schocher EEPROM. For example: 3192548738b4SHeiko Schocher 3193548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3194548738b4SHeiko Schocher 3195548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3196548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3197c609719bSwdenk 3198057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 31995779d8d9Swdenk 32005779d8d9Swdenk Define this if you have a DataFlash memory device which you 32015779d8d9Swdenk want to use for the environment. 32025779d8d9Swdenk 32030e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 32040e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 32050e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 32065779d8d9Swdenk 32075779d8d9Swdenk These three #defines specify the offset and size of the 32085779d8d9Swdenk environment area within the total memory of your DataFlash placed 32095779d8d9Swdenk at the specified address. 32105779d8d9Swdenk 32110a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 32120a85a9e7SLiu Gang 32130a85a9e7SLiu Gang Define this if you have a remote memory space which you 32140a85a9e7SLiu Gang want to use for the local device's environment. 32150a85a9e7SLiu Gang 32160a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 32170a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 32180a85a9e7SLiu Gang 32190a85a9e7SLiu Gang These two #defines specify the address and size of the 32200a85a9e7SLiu Gang environment area within the remote memory space. The 32210a85a9e7SLiu Gang local device can get the environment from remote memory 3222fc54c7faSLiu Gang space by SRIO or PCIE links. 32230a85a9e7SLiu Gang 32240a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 32250a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3226fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3227fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 32280a85a9e7SLiu Gang 322951bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 323013a5695bSwdenk 323113a5695bSwdenk Define this if you have a NAND device which you want to use 323213a5695bSwdenk for the environment. 323313a5695bSwdenk 32340e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 32350e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 323613a5695bSwdenk 323713a5695bSwdenk These two #defines specify the offset and size of the environment 3238fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3239fdd813deSScott Wood aligned to an erase block boundary. 32405779d8d9Swdenk 3241fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3242e443c944SMarkus Klotzbuecher 32430e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3244fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3245fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3246fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3247fdd813deSScott Wood aligned to an erase block boundary. 3248e443c944SMarkus Klotzbuecher 3249fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3250fdd813deSScott Wood 3251fdd813deSScott Wood Specifies the length of the region in which the environment 3252fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3253fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3254fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3255fdd813deSScott Wood the range to be avoided. 3256fdd813deSScott Wood 3257fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3258fdd813deSScott Wood 3259fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3260fdd813deSScott Wood environment from block zero's out-of-band data. The 3261fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3262fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3263fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3264e443c944SMarkus Klotzbuecher 3265b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3266b74ab737SGuennadi Liakhovetski 3267b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3268b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3269b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3270b74ab737SGuennadi Liakhovetski 32716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3272c609719bSwdenk 3273c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3274c609719bSwdenk area is used at an early stage (ROM part) if the environment 3275c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3276c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3277c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3278c609719bSwdenk to be a good choice since it makes it far enough from the 3279c609719bSwdenk start of the data area as well as from the stack pointer. 3280c609719bSwdenk 3281e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3282c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3283cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3284c609719bSwdenkuntil then to read environment variables. 3285c609719bSwdenk 328685ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 328785ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 328885ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 328985ec0bccSwdenknecessary, because the first environment variable we need is the 329085ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 329185ec0bccSwdenkhave any device yet where we could complain.] 3292c609719bSwdenk 3293c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3294c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 329585ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3296c609719bSwdenk 32976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3298fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3299fc3e2165Swdenk 33006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3301fc3e2165Swdenk also needs to be defined. 3302fc3e2165Swdenk 33036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3304fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3305c609719bSwdenk 3306f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3307f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3308f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3309f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3310f5675aa5SRon Madrid space for already greatly restricted images, including but not 3311f5675aa5SRon Madrid limited to NAND_SPL configurations. 3312f5675aa5SRon Madrid 3313c609719bSwdenkLow Level (hardware related) configuration options: 3314dc7c9a1aSwdenk--------------------------------------------------- 3315c609719bSwdenk 33166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3317c609719bSwdenk Cache Line Size of the CPU. 3318c609719bSwdenk 33196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3320c609719bSwdenk Default address of the IMMR after system reset. 33212535d602Swdenk 33222535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 33232535d602Swdenk and RPXsuper) to be able to adjust the position of 33242535d602Swdenk the IMMR register after a reset. 3325c609719bSwdenk 3326e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3327e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3328e46fedfeSTimur Tabi PowerPC SOCs. 3329e46fedfeSTimur Tabi 3330e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3331e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3332e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3333e46fedfeSTimur Tabi 3334e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3335e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3336e46fedfeSTimur Tabi 3337e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3338e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3339e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3340e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3341e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3342e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3343e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3344e46fedfeSTimur Tabi 3345e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3346e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3347e46fedfeSTimur Tabi 3348e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3349e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3350e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3351e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3352e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3353e46fedfeSTimur Tabi 3354e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3355e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3356e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3357e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3358e46fedfeSTimur Tabi 3359e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3360e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3361e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3362e46fedfeSTimur Tabi 33637f6c2cbcSwdenk- Floppy Disk Support: 33646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 33657f6c2cbcSwdenk 33667f6c2cbcSwdenk the default drive number (default value 0) 33677f6c2cbcSwdenk 33686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 33697f6c2cbcSwdenk 337011ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 33717f6c2cbcSwdenk (default value 1) 33727f6c2cbcSwdenk 33736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 33747f6c2cbcSwdenk 33757f6c2cbcSwdenk defines the offset of register from address. It 33767f6c2cbcSwdenk depends on which part of the data bus is connected to 337711ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 33787f6c2cbcSwdenk 33796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 33806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 33817f6c2cbcSwdenk default value. 33827f6c2cbcSwdenk 33836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 33847f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 33857f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 33867f6c2cbcSwdenk source code. It is used to make hardware dependant 33877f6c2cbcSwdenk initializations. 33887f6c2cbcSwdenk 33890abddf82SMacpaul Lin- CONFIG_IDE_AHB: 33900abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 33910abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 33920abddf82SMacpaul Lin When software is doing ATA command and data transfer to 33930abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 33940abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 33950abddf82SMacpaul Lin is requierd. 33960abddf82SMacpaul Lin 33976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 339825d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 339925d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3400c609719bSwdenk 34016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3402c609719bSwdenk 34037152b1d0Swdenk Start address of memory area that can be used for 3404c609719bSwdenk initial data and stack; please note that this must be 3405c609719bSwdenk writable memory that is working WITHOUT special 3406c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3407c609719bSwdenk will become available only after programming the 3408c609719bSwdenk memory controller and running certain initialization 3409c609719bSwdenk sequences. 3410c609719bSwdenk 3411c609719bSwdenk U-Boot uses the following memory types: 3412c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3413c609719bSwdenk - MPC824X: data cache 3414c609719bSwdenk - PPC4xx: data cache 3415c609719bSwdenk 34166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3417c609719bSwdenk 3418c609719bSwdenk Offset of the initial data structure in the memory 34196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 34206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3421c609719bSwdenk data is located at the end of the available space 3422553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 34236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 34246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 34256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3426c609719bSwdenk 3427c609719bSwdenk Note: 3428c609719bSwdenk On the MPC824X (or other systems that use the data 3429c609719bSwdenk cache for initial memory) the address chosen for 34306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3431c609719bSwdenk point to an otherwise UNUSED address space between 3432c609719bSwdenk the top of RAM and the start of the PCI space. 3433c609719bSwdenk 34346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3435c609719bSwdenk 34366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3437c609719bSwdenk 34386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3439c609719bSwdenk 34406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3441c609719bSwdenk 34426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3443c609719bSwdenk 34446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3445c609719bSwdenk 34466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3447c609719bSwdenk SDRAM timing 3448c609719bSwdenk 34496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3450c609719bSwdenk periodic timer for refresh 3451c609719bSwdenk 34526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3453c609719bSwdenk 34546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 34556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 34566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 34576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3458c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3459c609719bSwdenk 3460c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 34616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 34626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3463c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3464c609719bSwdenk 34656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 34666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3467c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3468c609719bSwdenk Prescaler definitions (SDRAM timing) 3469c609719bSwdenk 34706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3471c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3472c609719bSwdenk define relocation offset in DPRAM [DSP2] 3473c609719bSwdenk 34746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3475b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3476b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3477b423d055SHeiko Schocher 34786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3479c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3480c609719bSwdenk define relocation offset in DPRAM [SCC4] 3481c609719bSwdenk 34826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3483c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3484c609719bSwdenk wrong setting might damage your board. Read 3485c609719bSwdenk doc/README.MBX before setting this variable! 3486c609719bSwdenk 34876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3488ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3489ea909b76Swdenk (Power On Self Tests). This definition overrides 3490ea909b76Swdenk #define'd default value in commproc.h resp. 3491ea909b76Swdenk cpm_8260.h. 3492ea909b76Swdenk 34936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 34946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 34956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 34966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 34976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 34986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 34996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 35006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3501a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 35025d232d0eSwdenk 35039cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 35049cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 35059cacf4fcSDirk Eibach required. 35069cacf4fcSDirk Eibach 350769fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 350869fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 350969fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 351069fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 351169fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 351269fd2d3bSAndrew Sharp by coreboot or similar. 351369fd2d3bSAndrew Sharp 3514a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3515a09b9b68SKumar Gala Chip has SRIO or not 3516a09b9b68SKumar Gala 3517a09b9b68SKumar Gala- CONFIG_SRIO1: 3518a09b9b68SKumar Gala Board has SRIO 1 port available 3519a09b9b68SKumar Gala 3520a09b9b68SKumar Gala- CONFIG_SRIO2: 3521a09b9b68SKumar Gala Board has SRIO 2 port available 3522a09b9b68SKumar Gala 3523a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3524a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3525a09b9b68SKumar Gala 3526a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3527a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3528a09b9b68SKumar Gala 3529a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3530a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3531a09b9b68SKumar Gala 3532eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3533eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3534eced4626SAlex Waterman 16 bit bus. 3535eced4626SAlex Waterman 3536eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3537eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3538eced4626SAlex Waterman a default value will be used. 3539eced4626SAlex Waterman 3540bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3541218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3542218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3543218ca724SWolfgang Denk 3544bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3545bb99ad6dSBen Warren I2C address of the SPD EEPROM 3546bb99ad6dSBen Warren 35476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3548218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3549218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3550218ca724SWolfgang Denk to something your driver can deal with. 3551bb99ad6dSBen Warren 35521b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 35531b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 35541b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 35551b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 35561b3e3c4fSYork Sun header files or board specific files. 35571b3e3c4fSYork Sun 35586f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 35596f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 35606f5e1dc5SYork Sun 35616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3562218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3563218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 35642ad6b513STimur Tabi 3565c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3566c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3567c26e454dSwdenk 3568c26e454dSwdenk- CONFIG_FEC[12]_PHY 3569c26e454dSwdenk Define to the hardcoded PHY address which corresponds 35706e592385Swdenk to the given FEC; i. e. 3571c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3572c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3573c26e454dSwdenk 3574c26e454dSwdenk When set to -1, means to probe for first available. 3575c26e454dSwdenk 3576c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3577c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3578c26e454dSwdenk (so program the FEC to ignore it). 3579c26e454dSwdenk 3580c26e454dSwdenk- CONFIG_RMII 3581c26e454dSwdenk Enable RMII mode for all FECs. 3582c26e454dSwdenk Note that this is a global option, we can't 3583c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3584c26e454dSwdenk 35855cf91d6bSwdenk- CONFIG_CRC32_VERIFY 35865cf91d6bSwdenk Add a verify option to the crc32 command. 35875cf91d6bSwdenk The syntax is: 35885cf91d6bSwdenk 35895cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 35905cf91d6bSwdenk 35915cf91d6bSwdenk Where address/count indicate a memory area 35925cf91d6bSwdenk and crc32 is the correct crc32 which the 35935cf91d6bSwdenk area should have. 35945cf91d6bSwdenk 359556523f12Swdenk- CONFIG_LOOPW 359656523f12Swdenk Add the "loopw" memory command. This only takes effect if 3597602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 359856523f12Swdenk 35997b466641Sstroese- CONFIG_MX_CYCLIC 36007b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 36017b466641Sstroese "md/mw" commands. 36027b466641Sstroese Examples: 36037b466641Sstroese 36047b466641Sstroese => mdc.b 10 4 500 36057b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 36067b466641Sstroese 36077b466641Sstroese => mwc.l 100 12345678 10 36087b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 36097b466641Sstroese 36107b466641Sstroese This only takes effect if the memory commands are activated 3611602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 36127b466641Sstroese 36138aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3614afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3615e03f3169SWolfgang Denk low level initializations (like setting up the memory 3616e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3617e03f3169SWolfgang Denk relocate itself into RAM. 36188aa1a2d1Swdenk 3619e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3620e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3621e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3622e03f3169SWolfgang Denk these initializations itself. 36238aa1a2d1Swdenk 3624401bb30bSAneesh V- CONFIG_SPL_BUILD 3625df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3626df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3627df81238bSMagnus Lilja compiling a NAND SPL. 3628400558b5Swdenk 3629d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3630d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3631d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3632d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3633d8834a13SMatthias Weisser conditions but may increase the binary size. 3634d8834a13SMatthias Weisser 3635f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3636f2717b47STimur Tabi----------------------------------- 3637f2717b47STimur Tabi 3638f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3639f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3640f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3641f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3642f2717b47STimur Tabiwithin that device. 3643f2717b47STimur Tabi 3644f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3645f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3646f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3647f2717b47STimur Tabi is also specified. 3648f2717b47STimur Tabi 3649f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3650f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3651f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3652f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3653f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3654f2717b47STimur Tabi 3655f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3656f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3657f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3658f2717b47STimur Tabi virtual address in NOR flash. 3659f2717b47STimur Tabi 3660f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3661f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3662f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3663f2717b47STimur Tabi 3664f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3665f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3666f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3667f2717b47STimur Tabi 3668f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3669f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3670f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3671f2717b47STimur Tabi 3672292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3673292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3674292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3675fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3676fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3677fc54c7faSLiu Gang master's memory space. 3678f2717b47STimur Tabi 3679c609719bSwdenkBuilding the Software: 3680c609719bSwdenk====================== 3681c609719bSwdenk 3682218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3683218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3684218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3685218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3686218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3687218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3688c609719bSwdenk 3689218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3690218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3691218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3692218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3693218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3694c609719bSwdenk 3695218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3696218ca724SWolfgang Denk $ export CROSS_COMPILE 3697c609719bSwdenk 36982f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 36992f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 37002f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 37012f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 37022f8d396bSPeter Tyser 37032f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 37042f8d396bSPeter Tyser 37052f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 37062f8d396bSPeter Tyser be executed on computers running Windows. 37072f8d396bSPeter Tyser 3708c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3709c609719bSwdenksources you must configure U-Boot for one specific board type. This 3710c609719bSwdenkis done by typing: 3711c609719bSwdenk 3712c609719bSwdenk make NAME_config 3713c609719bSwdenk 3714218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 37154d675ae6SMichael Jonesrations; see boards.cfg for supported names. 371654387ac9Swdenk 3717c609719bSwdenkNote: for some board special configuration names may exist; check if 3718c609719bSwdenk additional information is available from the board vendor; for 37192729af9dSwdenk instance, the TQM823L systems are available without (standard) 37202729af9dSwdenk or with LCD support. You can select such additional "features" 372111ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3722c609719bSwdenk 37232729af9dSwdenk make TQM823L_config 37242729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3725c609719bSwdenk 3726c609719bSwdenk make TQM823L_LCD_config 3727c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3728c609719bSwdenk 3729c609719bSwdenk etc. 3730c609719bSwdenk 3731c609719bSwdenk 3732c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 37337152b1d0Swdenkimages ready for download to / installation on your system: 3734c609719bSwdenk 3735c609719bSwdenk- "u-boot.bin" is a raw binary image 3736c609719bSwdenk- "u-boot" is an image in ELF binary format 3737c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3738c609719bSwdenk 3739baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3740baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3741baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3742baf31249SMarian Balakowicz 3743baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3744baf31249SMarian Balakowicz 3745baf31249SMarian Balakowicz make O=/tmp/build distclean 3746baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3747baf31249SMarian Balakowicz make O=/tmp/build all 3748baf31249SMarian Balakowicz 3749baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3750baf31249SMarian Balakowicz 3751baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3752baf31249SMarian Balakowicz make distclean 3753baf31249SMarian Balakowicz make NAME_config 3754baf31249SMarian Balakowicz make all 3755baf31249SMarian Balakowicz 3756baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3757baf31249SMarian Balakowiczvariable. 3758baf31249SMarian Balakowicz 3759c609719bSwdenk 3760c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3761c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3762c609719bSwdenknative "make". 3763c609719bSwdenk 3764c609719bSwdenk 3765c609719bSwdenkIf the system board that you have is not listed, then you will need 3766c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3767c609719bSwdenksteps: 3768c609719bSwdenk 3769c609719bSwdenk1. Add a new configuration option for your board to the toplevel 37704d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 37714d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3772c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 377385ec0bccSwdenk files you need. In your board directory, you will need at least 377485ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 377585ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 377685ec0bccSwdenk your board 3777c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3778c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 377985ec0bccSwdenk4. Run "make <board>_config" with your new name. 3780c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3781c609719bSwdenk to be installed on your target system. 378285ec0bccSwdenk6. Debug and solve any problems that might arise. 3783c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3784c609719bSwdenk 3785c609719bSwdenk 3786c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3787c609719bSwdenk============================================================== 3788c609719bSwdenk 3789c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3790c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3791c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3792c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3793218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3794c609719bSwdenk 3795c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3796c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3797c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3798c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3799c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 38007152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3801218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3802218ca724SWolfgang Denkyou can type 3803c609719bSwdenk 3804c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3805c609719bSwdenk 3806c609719bSwdenkor to build on a native PowerPC system you can type 3807c609719bSwdenk 3808c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3809c609719bSwdenk 3810218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3811218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3812218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3813218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3814218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3815218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3816218ca724SWolfgang Denkvariable. For example: 3817baf31249SMarian Balakowicz 3818baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3819baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3820baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3821baf31249SMarian Balakowicz 3822218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3823218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3824218ca724SWolfgang Denkduring the whole build process. 3825baf31249SMarian Balakowicz 3826baf31249SMarian Balakowicz 3827c609719bSwdenkSee also "U-Boot Porting Guide" below. 3828c609719bSwdenk 3829c609719bSwdenk 3830c609719bSwdenkMonitor Commands - Overview: 3831c609719bSwdenk============================ 3832c609719bSwdenk 3833c609719bSwdenkgo - start application at address 'addr' 3834c609719bSwdenkrun - run commands in an environment variable 3835c609719bSwdenkbootm - boot application image from memory 3836c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 383744f074c7SMarek Vasutbootz - boot zImage from memory 3838c609719bSwdenktftpboot- boot image via network using TFTP protocol 3839c609719bSwdenk and env variables "ipaddr" and "serverip" 3840c609719bSwdenk (and eventually "gatewayip") 38411fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3842c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3843c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3844c609719bSwdenkloads - load S-Record file over serial line 3845c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3846c609719bSwdenkmd - memory display 3847c609719bSwdenkmm - memory modify (auto-incrementing) 3848c609719bSwdenknm - memory modify (constant address) 3849c609719bSwdenkmw - memory write (fill) 3850c609719bSwdenkcp - memory copy 3851c609719bSwdenkcmp - memory compare 3852c609719bSwdenkcrc32 - checksum calculation 38530f89c54bSPeter Tyseri2c - I2C sub-system 3854c609719bSwdenksspi - SPI utility commands 3855c609719bSwdenkbase - print or set address offset 3856c609719bSwdenkprintenv- print environment variables 3857c609719bSwdenksetenv - set environment variables 3858c609719bSwdenksaveenv - save environment variables to persistent storage 3859c609719bSwdenkprotect - enable or disable FLASH write protection 3860c609719bSwdenkerase - erase FLASH memory 3861c609719bSwdenkflinfo - print FLASH memory information 3862c609719bSwdenkbdinfo - print Board Info structure 3863c609719bSwdenkiminfo - print header information for application image 3864c609719bSwdenkconinfo - print console devices and informations 3865c609719bSwdenkide - IDE sub-system 3866c609719bSwdenkloop - infinite loop on address range 386756523f12Swdenkloopw - infinite write loop on address range 3868c609719bSwdenkmtest - simple RAM test 3869c609719bSwdenkicache - enable or disable instruction cache 3870c609719bSwdenkdcache - enable or disable data cache 3871c609719bSwdenkreset - Perform RESET of the CPU 3872c609719bSwdenkecho - echo args to console 3873c609719bSwdenkversion - print monitor version 3874c609719bSwdenkhelp - print online help 3875c609719bSwdenk? - alias for 'help' 3876c609719bSwdenk 3877c609719bSwdenk 3878c609719bSwdenkMonitor Commands - Detailed Description: 3879c609719bSwdenk======================================== 3880c609719bSwdenk 3881c609719bSwdenkTODO. 3882c609719bSwdenk 3883c609719bSwdenkFor now: just type "help <command>". 3884c609719bSwdenk 3885c609719bSwdenk 3886c609719bSwdenkEnvironment Variables: 3887c609719bSwdenk====================== 3888c609719bSwdenk 3889c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3890c609719bSwdenkcan be made persistent by saving to Flash memory. 3891c609719bSwdenk 3892c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3893c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3894c609719bSwdenkwithout a value can be used to delete a variable from the 3895c609719bSwdenkenvironment. As long as you don't save the environment you are 3896c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3897c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3898c609719bSwdenk 3899c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3900c96f86eeSWolfgang Denk 3901c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3902c609719bSwdenk 3903c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3904c609719bSwdenk 3905c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3906c609719bSwdenk 3907c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3908c609719bSwdenk 3909c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3910c609719bSwdenk 3911c609719bSwdenk bootfile - Name of the image to load with TFTP 3912c609719bSwdenk 39137d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 39147d721e34SBartlomiej Sieka command can be restricted. This variable is given as 39157d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 39167d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 39177d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 39187d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3919c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3920c3624e6eSGrant Likely bootm_mapsize. 3921c3624e6eSGrant Likely 3922c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3923c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3924c3624e6eSGrant Likely defines the size of the memory region starting at base 3925c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3926c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3927c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3928c3624e6eSGrant Likely used otherwise. 39297d721e34SBartlomiej Sieka 39307d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 39317d721e34SBartlomiej Sieka command can be restricted. This variable is given as 39327d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 39337d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 39347d721e34SBartlomiej Sieka environment variable. 39357d721e34SBartlomiej Sieka 39364bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 39374bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 39384bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 39394bae9090SBartlomiej Sieka 3940c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3941c609719bSwdenk "bootp" will just load perform a lookup of the 3942c609719bSwdenk configuration from the BOOTP server, but not try to 3943c609719bSwdenk load any image using TFTP 3944c609719bSwdenk 3945c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3946c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3947c609719bSwdenk be automatically started (by internally calling 3948c609719bSwdenk "bootm") 3949c609719bSwdenk 39504a6fd34bSwdenk If set to "no", a standalone image passed to the 39514a6fd34bSwdenk "bootm" command will be copied to the load address 39524a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 39534a6fd34bSwdenk This can be used to load and uncompress arbitrary 39544a6fd34bSwdenk data. 39554a6fd34bSwdenk 3956a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3957a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3958fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3959fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3960fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3961fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3962fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3963fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3964fa34f6b2SShawn Guo access it during the boot procedure. 3965fa34f6b2SShawn Guo 3966a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3967a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3968a28afca5SDavid A. Long to work it must reside in writable memory, have 3969a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3970a28afca5SDavid A. Long add the information it needs into it, and the memory 3971a28afca5SDavid A. Long must be accessible by the kernel. 3972a28afca5SDavid A. Long 3973eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3974eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3975eea63e05SSimon Glass defined. 3976eea63e05SSimon Glass 397717ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 397817ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 397917ea1177Swdenk mode (400kHZ). This environment variable is used in 398017ea1177Swdenk initialization code. So, for changes to be effective 398117ea1177Swdenk it must be saved and board must be reset. 398217ea1177Swdenk 3983c609719bSwdenk initrd_high - restrict positioning of initrd images: 3984c609719bSwdenk If this variable is not set, initrd images will be 3985c609719bSwdenk copied to the highest possible address in RAM; this 3986c609719bSwdenk is usually what you want since it allows for 3987c609719bSwdenk maximum initrd size. If for some reason you want to 3988c609719bSwdenk make sure that the initrd image is loaded below the 39896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3990c609719bSwdenk variable to a value of "no" or "off" or "0". 3991c609719bSwdenk Alternatively, you can set it to a maximum upper 3992c609719bSwdenk address to use (U-Boot will still check that it 3993c609719bSwdenk does not overwrite the U-Boot stack and data). 3994c609719bSwdenk 3995c609719bSwdenk For instance, when you have a system with 16 MB 39967152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3997c609719bSwdenk you can do this by adding "mem=12M" to the value of 3998c609719bSwdenk the "bootargs" variable. However, now you must make 39997152b1d0Swdenk sure that the initrd image is placed in the first 4000c609719bSwdenk 12 MB as well - this can be done with 4001c609719bSwdenk 4002c609719bSwdenk setenv initrd_high 00c00000 4003c609719bSwdenk 400438b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 400538b99261Swdenk indication to U-Boot that all addresses are legal 400638b99261Swdenk for the Linux kernel, including addresses in flash 400738b99261Swdenk memory. In this case U-Boot will NOT COPY the 400838b99261Swdenk ramdisk at all. This may be useful to reduce the 400938b99261Swdenk boot time on your system, but requires that this 401038b99261Swdenk feature is supported by your Linux kernel. 401138b99261Swdenk 4012c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4013c609719bSwdenk 4014c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4015dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4016c609719bSwdenk 4017c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4018c609719bSwdenk 4019c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4020c609719bSwdenk 4021c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4022c609719bSwdenk 4023c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4024c609719bSwdenk 4025c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4026c609719bSwdenk 4027e2a53458SMike Frysinger ethprime - controls which interface is used first. 4028a3d991bdSwdenk 4029e2a53458SMike Frysinger ethact - controls which interface is currently active. 4030e2a53458SMike Frysinger For example you can do the following 4031a3d991bdSwdenk 403248690d80SHeiko Schocher => setenv ethact FEC 403348690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 403448690d80SHeiko Schocher => setenv ethact SCC 403548690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4036a3d991bdSwdenk 4037e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4038e1692577SMatthias Fuchs available network interfaces. 4039e1692577SMatthias Fuchs It just stays at the currently selected interface. 4040e1692577SMatthias Fuchs 4041a3d991bdSwdenk netretry - When set to "no" each network operation will 4042a3d991bdSwdenk either succeed or fail without retrying. 40436e592385Swdenk When set to "once" the network operation will 40446e592385Swdenk fail when all the available network interfaces 40456e592385Swdenk are tried once without success. 4046a3d991bdSwdenk Useful on scripts which control the retry operation 4047a3d991bdSwdenk themselves. 4048a3d991bdSwdenk 4049b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4050a1cf027aSJean-Christophe PLAGNIOL-VILLARD 405128cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4052ecb0ccd9SWolfgang Denk UDP source port. 4053ecb0ccd9SWolfgang Denk 405428cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 405528cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 405628cb9375SWolfgang Denk 4057c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4058c96f86eeSWolfgang Denk we use the TFTP server's default block size 4059c96f86eeSWolfgang Denk 4060c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4061c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4062c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4063c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4064c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4065c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4066c96f86eeSWolfgang Denk with unreliable TFTP servers. 4067c96f86eeSWolfgang Denk 4068a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 406911ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4070a3d991bdSwdenk VLAN tagged frames. 4071c609719bSwdenk 4072dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4073dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4074dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4075dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4076dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4077dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4078dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4079dc0b7b0eSJason Hobbs 4080dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4081dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4082dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4083dc0b7b0eSJason Hobbs 4084dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4085dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4086dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4087dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4088dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4089dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4090dc0b7b0eSJason Hobbs 4091c609719bSwdenkThe following environment variables may be used and automatically 4092c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4093c609719bSwdenkdepending the information provided by your boot server: 4094c609719bSwdenk 4095c609719bSwdenk bootfile - see above 4096c609719bSwdenk dnsip - IP address of your Domain Name Server 4097fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4098c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4099c609719bSwdenk hostname - Target hostname 4100c609719bSwdenk ipaddr - see above 4101c609719bSwdenk netmask - Subnet Mask 4102c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4103c609719bSwdenk serverip - see above 4104c609719bSwdenk 4105c609719bSwdenk 4106c609719bSwdenkThere are two special Environment Variables: 4107c609719bSwdenk 4108c609719bSwdenk serial# - contains hardware identification information such 4109c609719bSwdenk as type string and/or serial number 4110c609719bSwdenk ethaddr - Ethernet address 4111c609719bSwdenk 4112c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4113c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4114c609719bSwdenkonce they have been set once. 4115c609719bSwdenk 4116c609719bSwdenk 4117c1551ea8SstroeseFurther special Environment Variables: 4118c1551ea8Sstroese 4119c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4120c1551ea8Sstroese with the "version" command. This variable is 4121c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4122c1551ea8Sstroese 4123c1551ea8Sstroese 4124c609719bSwdenkPlease note that changes to some configuration parameters may take 4125c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4126c609719bSwdenk 4127c609719bSwdenk 4128f07771ccSwdenkCommand Line Parsing: 4129f07771ccSwdenk===================== 4130f07771ccSwdenk 4131f07771ccSwdenkThere are two different command line parsers available with U-Boot: 41327152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4133f07771ccSwdenk 4134f07771ccSwdenkOld, simple command line parser: 4135f07771ccSwdenk-------------------------------- 4136f07771ccSwdenk 4137f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4138f07771ccSwdenk- several commands on one line, separated by ';' 4139fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4140f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4141f07771ccSwdenk for example: 4142fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4143f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4144f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4145f07771ccSwdenk 4146f07771ccSwdenkHush shell: 4147f07771ccSwdenk----------- 4148f07771ccSwdenk 4149f07771ccSwdenk- similar to Bourne shell, with control structures like 4150f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4151f07771ccSwdenk until...do...done, ... 4152f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4153f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4154f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4155f07771ccSwdenk command 4156f07771ccSwdenk 4157f07771ccSwdenkGeneral rules: 4158f07771ccSwdenk-------------- 4159f07771ccSwdenk 4160f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4161f07771ccSwdenk command) contains several commands separated by semicolon, and 4162f07771ccSwdenk one of these commands fails, then the remaining commands will be 4163f07771ccSwdenk executed anyway. 4164f07771ccSwdenk 4165f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 416611ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4167f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4168f07771ccSwdenk variables are not executed. 4169f07771ccSwdenk 4170c609719bSwdenkNote for Redundant Ethernet Interfaces: 4171c609719bSwdenk======================================= 4172c609719bSwdenk 417311ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4174c609719bSwdenksuch configurations and is capable of automatic selection of a 41757152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4176c609719bSwdenk 4177c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4178c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4179c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4180c609719bSwdenk 4181c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4182c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4183c609719bSwdenkding setting in the environment; if the corresponding environment 4184c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4185c609719bSwdenk 4186c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4187c609719bSwdenk environment, the SROM's address is used. 4188c609719bSwdenk 4189c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4190c609719bSwdenk environment exists, then the value from the environment variable is 4191c609719bSwdenk used. 4192c609719bSwdenk 4193c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4194c609719bSwdenk both addresses are the same, this MAC address is used. 4195c609719bSwdenk 4196c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4197c609719bSwdenk addresses differ, the value from the environment is used and a 4198c609719bSwdenk warning is printed. 4199c609719bSwdenk 4200c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4201c609719bSwdenk is raised. 4202c609719bSwdenk 4203ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4204ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4205ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4206ecee9324SBen WarrenThe naming convention is as follows: 4207ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4208c609719bSwdenk 4209c609719bSwdenkImage Formats: 4210c609719bSwdenk============== 4211c609719bSwdenk 42123310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 42133310c549SMarian Balakowiczimages in two formats: 42143310c549SMarian Balakowicz 42153310c549SMarian BalakowiczNew uImage format (FIT) 42163310c549SMarian Balakowicz----------------------- 42173310c549SMarian Balakowicz 42183310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 42193310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 42203310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 42213310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 42223310c549SMarian Balakowicz 42233310c549SMarian Balakowicz 42243310c549SMarian BalakowiczOld uImage format 42253310c549SMarian Balakowicz----------------- 42263310c549SMarian Balakowicz 42273310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 42283310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 42293310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4230c609719bSwdenk 4231c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4232c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4233f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4234f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4235f5ed9e39SPeter Tyser INTEGRITY). 42367b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4237afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4238afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4239c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4240c609719bSwdenk* Load Address 4241c609719bSwdenk* Entry Point 4242c609719bSwdenk* Image Name 4243c609719bSwdenk* Image Timestamp 4244c609719bSwdenk 4245c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4246c609719bSwdenkand the data portions of the image are secured against corruption by 4247c609719bSwdenkCRC32 checksums. 4248c609719bSwdenk 4249c609719bSwdenk 4250c609719bSwdenkLinux Support: 4251c609719bSwdenk============== 4252c609719bSwdenk 4253c609719bSwdenkAlthough U-Boot should support any OS or standalone application 42547152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4255c609719bSwdenkU-Boot. 4256c609719bSwdenk 4257c609719bSwdenkU-Boot includes many features that so far have been part of some 4258c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4259c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4260c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 42617152b1d0Swdenkserves several purposes: 4262c609719bSwdenk 4263c609719bSwdenk- the same features can be used for other OS or standalone 4264c609719bSwdenk applications (for instance: using compressed images to reduce the 4265c609719bSwdenk Flash memory footprint) 4266c609719bSwdenk 4267c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 42687152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4269c609719bSwdenk 4270c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4271c609719bSwdenk images; of course this also means that different kernel images can 4272c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4273c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4274c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4275c609719bSwdenk software is easier now. 4276c609719bSwdenk 4277c609719bSwdenk 4278c609719bSwdenkLinux HOWTO: 4279c609719bSwdenk============ 4280c609719bSwdenk 4281c609719bSwdenkPorting Linux to U-Boot based systems: 4282c609719bSwdenk--------------------------------------- 4283c609719bSwdenk 4284c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4285c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4286c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4287c609719bSwdenkLinux :-). 4288c609719bSwdenk 4289a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4290c609719bSwdenk 4291c609719bSwdenkJust make sure your machine specific header file (for instance 4292c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 42931dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 42941dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 42956d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4296c609719bSwdenk 4297c609719bSwdenk 4298c609719bSwdenkConfiguring the Linux kernel: 4299c609719bSwdenk----------------------------- 4300c609719bSwdenk 4301c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4302c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4303c609719bSwdenk 4304c609719bSwdenk 4305c609719bSwdenkBuilding a Linux Image: 4306c609719bSwdenk----------------------- 4307c609719bSwdenk 430824ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 430924ee89b9Swdenknot used. If you use recent kernel source, a new build target 431024ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 431124ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 431224ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 431324ee89b9Swdenk100% compatible format. 4314c609719bSwdenk 4315c609719bSwdenkExample: 4316c609719bSwdenk 4317c609719bSwdenk make TQM850L_config 4318c609719bSwdenk make oldconfig 4319c609719bSwdenk make dep 432024ee89b9Swdenk make uImage 4321c609719bSwdenk 432224ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 432324ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 432424ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4325c609719bSwdenk 432624ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 432724ee89b9Swdenk 432824ee89b9Swdenk* convert the kernel into a raw binary image: 432924ee89b9Swdenk 433024ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 433124ee89b9Swdenk -R .note -R .comment \ 433224ee89b9Swdenk -S vmlinux linux.bin 433324ee89b9Swdenk 433424ee89b9Swdenk* compress the binary image: 433524ee89b9Swdenk 433624ee89b9Swdenk gzip -9 linux.bin 433724ee89b9Swdenk 433824ee89b9Swdenk* package compressed binary image for U-Boot: 433924ee89b9Swdenk 434024ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 434124ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 434224ee89b9Swdenk -d linux.bin.gz uImage 434324ee89b9Swdenk 434424ee89b9Swdenk 434524ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 434624ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 434724ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 434824ee89b9Swdenkbyte header containing information about target architecture, 434924ee89b9Swdenkoperating system, image type, compression method, entry points, time 435024ee89b9Swdenkstamp, CRC32 checksums, etc. 435124ee89b9Swdenk 435224ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 435324ee89b9Swdenkprint the header information, or to build new images. 4354c609719bSwdenk 4355c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4356c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4357c609719bSwdenkchecksum verification: 4358c609719bSwdenk 4359c609719bSwdenk tools/mkimage -l image 4360c609719bSwdenk -l ==> list image header information 4361c609719bSwdenk 4362c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4363c609719bSwdenkfrom a "data file" which is used as image payload: 4364c609719bSwdenk 4365c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4366c609719bSwdenk -n name -d data_file image 4367c609719bSwdenk -A ==> set architecture to 'arch' 4368c609719bSwdenk -O ==> set operating system to 'os' 4369c609719bSwdenk -T ==> set image type to 'type' 4370c609719bSwdenk -C ==> set compression type 'comp' 4371c609719bSwdenk -a ==> set load address to 'addr' (hex) 4372c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4373c609719bSwdenk -n ==> set image name to 'name' 4374c609719bSwdenk -d ==> use image data from 'datafile' 4375c609719bSwdenk 437669459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 437769459791Swdenkaddress (0x00000000), but the entry point address depends on the 437869459791Swdenkkernel version: 4379c609719bSwdenk 4380c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 438124ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4382c609719bSwdenk 4383c609719bSwdenkSo a typical call to build a U-Boot image would read: 4384c609719bSwdenk 438524ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 438624ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4387a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 438824ee89b9Swdenk > examples/uImage.TQM850L 438924ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4390c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4391c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4392c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4393c609719bSwdenk Load Address: 0x00000000 439424ee89b9Swdenk Entry Point: 0x00000000 4395c609719bSwdenk 4396c609719bSwdenkTo verify the contents of the image (or check for corruption): 4397c609719bSwdenk 439824ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 439924ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4400c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4401c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4402c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4403c609719bSwdenk Load Address: 0x00000000 440424ee89b9Swdenk Entry Point: 0x00000000 4405c609719bSwdenk 4406c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4407c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4408c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4409c609719bSwdenkneed to be uncompressed: 4410c609719bSwdenk 4411a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 441224ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 441324ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4414a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 441524ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 441624ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4417c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4418c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4419c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4420c609719bSwdenk Load Address: 0x00000000 442124ee89b9Swdenk Entry Point: 0x00000000 4422c609719bSwdenk 4423c609719bSwdenk 4424c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4425c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4426c609719bSwdenk 4427c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4428c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4429c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4430c609719bSwdenk Image Name: Simple Ramdisk Image 4431c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4432c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4433c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4434c609719bSwdenk Load Address: 0x00000000 4435c609719bSwdenk Entry Point: 0x00000000 4436c609719bSwdenk 4437c609719bSwdenk 4438c609719bSwdenkInstalling a Linux Image: 4439c609719bSwdenk------------------------- 4440c609719bSwdenk 4441c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4442c609719bSwdenkyou must convert the image to S-Record format: 4443c609719bSwdenk 4444c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4445c609719bSwdenk 4446c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4447c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4448c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4449c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4450c609719bSwdenkcommand. 4451c609719bSwdenk 4452c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4453c609719bSwdenkTQM8xxL is in the first Flash bank): 4454c609719bSwdenk 4455c609719bSwdenk => erase 40100000 401FFFFF 4456c609719bSwdenk 4457c609719bSwdenk .......... done 4458c609719bSwdenk Erased 8 sectors 4459c609719bSwdenk 4460c609719bSwdenk => loads 40100000 4461c609719bSwdenk ## Ready for S-Record download ... 4462c609719bSwdenk ~>examples/image.srec 4463c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4464c609719bSwdenk ... 4465c609719bSwdenk 15989 15990 15991 15992 4466c609719bSwdenk [file transfer complete] 4467c609719bSwdenk [connected] 4468c609719bSwdenk ## Start Addr = 0x00000000 4469c609719bSwdenk 4470c609719bSwdenk 4471c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4472c609719bSwdenkthis includes a checksum verification so you can be sure no data 4473c609719bSwdenkcorruption happened: 4474c609719bSwdenk 4475c609719bSwdenk => imi 40100000 4476c609719bSwdenk 4477c609719bSwdenk ## Checking Image at 40100000 ... 4478c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4479c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4480c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4481c609719bSwdenk Load Address: 00000000 4482c609719bSwdenk Entry Point: 0000000c 4483c609719bSwdenk Verifying Checksum ... OK 4484c609719bSwdenk 4485c609719bSwdenk 4486c609719bSwdenkBoot Linux: 4487c609719bSwdenk----------- 4488c609719bSwdenk 4489c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4490c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4491c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4492c609719bSwdenkparameters. You can check and modify this variable using the 4493c609719bSwdenk"printenv" and "setenv" commands: 4494c609719bSwdenk 4495c609719bSwdenk 4496c609719bSwdenk => printenv bootargs 4497c609719bSwdenk bootargs=root=/dev/ram 4498c609719bSwdenk 4499c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4500c609719bSwdenk 4501c609719bSwdenk => printenv bootargs 4502c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4503c609719bSwdenk 4504c609719bSwdenk => bootm 40020000 4505c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4506c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4507c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4508c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4509c609719bSwdenk Load Address: 00000000 4510c609719bSwdenk Entry Point: 0000000c 4511c609719bSwdenk Verifying Checksum ... OK 4512c609719bSwdenk Uncompressing Kernel Image ... OK 4513c609719bSwdenk 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 4514c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4515c609719bSwdenk time_init: decrementer frequency = 187500000/60 4516c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4517c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4518c609719bSwdenk ... 4519c609719bSwdenk 452011ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 45217152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4522c609719bSwdenkformat!) to the "bootm" command: 4523c609719bSwdenk 4524c609719bSwdenk => imi 40100000 40200000 4525c609719bSwdenk 4526c609719bSwdenk ## Checking Image at 40100000 ... 4527c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4528c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4529c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4530c609719bSwdenk Load Address: 00000000 4531c609719bSwdenk Entry Point: 0000000c 4532c609719bSwdenk Verifying Checksum ... OK 4533c609719bSwdenk 4534c609719bSwdenk ## Checking Image at 40200000 ... 4535c609719bSwdenk Image Name: Simple Ramdisk Image 4536c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4537c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4538c609719bSwdenk Load Address: 00000000 4539c609719bSwdenk Entry Point: 00000000 4540c609719bSwdenk Verifying Checksum ... OK 4541c609719bSwdenk 4542c609719bSwdenk => bootm 40100000 40200000 4543c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4544c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4545c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4546c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4547c609719bSwdenk Load Address: 00000000 4548c609719bSwdenk Entry Point: 0000000c 4549c609719bSwdenk Verifying Checksum ... OK 4550c609719bSwdenk Uncompressing Kernel Image ... OK 4551c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4552c609719bSwdenk Image Name: Simple Ramdisk Image 4553c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4554c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4555c609719bSwdenk Load Address: 00000000 4556c609719bSwdenk Entry Point: 00000000 4557c609719bSwdenk Verifying Checksum ... OK 4558c609719bSwdenk Loading Ramdisk ... OK 4559c609719bSwdenk 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 4560c609719bSwdenk Boot arguments: root=/dev/ram 4561c609719bSwdenk time_init: decrementer frequency = 187500000/60 4562c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4563c609719bSwdenk ... 4564c609719bSwdenk RAMDISK: Compressed image found at block 0 4565c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4566c609719bSwdenk 4567c609719bSwdenk bash# 4568c609719bSwdenk 45690267768eSMatthew McClintockBoot Linux and pass a flat device tree: 45700267768eSMatthew McClintock----------- 45710267768eSMatthew McClintock 45720267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 45730267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 45740267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 45750267768eSMatthew McClintockflat device tree: 45760267768eSMatthew McClintock 45770267768eSMatthew McClintock=> print oftaddr 45780267768eSMatthew McClintockoftaddr=0x300000 45790267768eSMatthew McClintock=> print oft 45800267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 45810267768eSMatthew McClintock=> tftp $oftaddr $oft 45820267768eSMatthew McClintockSpeed: 1000, full duplex 45830267768eSMatthew McClintockUsing TSEC0 device 45840267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 45850267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 45860267768eSMatthew McClintockLoad address: 0x300000 45870267768eSMatthew McClintockLoading: # 45880267768eSMatthew McClintockdone 45890267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 45900267768eSMatthew McClintock=> tftp $loadaddr $bootfile 45910267768eSMatthew McClintockSpeed: 1000, full duplex 45920267768eSMatthew McClintockUsing TSEC0 device 45930267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 45940267768eSMatthew McClintockFilename 'uImage'. 45950267768eSMatthew McClintockLoad address: 0x200000 45960267768eSMatthew McClintockLoading:############ 45970267768eSMatthew McClintockdone 45980267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 45990267768eSMatthew McClintock=> print loadaddr 46000267768eSMatthew McClintockloadaddr=200000 46010267768eSMatthew McClintock=> print oftaddr 46020267768eSMatthew McClintockoftaddr=0x300000 46030267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 46040267768eSMatthew McClintock## Booting image at 00200000 ... 46050267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 46060267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 46070267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 46080267768eSMatthew McClintock Load Address: 00000000 46090267768eSMatthew McClintock Entry Point: 00000000 46100267768eSMatthew McClintock Verifying Checksum ... OK 46110267768eSMatthew McClintock Uncompressing Kernel Image ... OK 46120267768eSMatthew McClintockBooting using flat device tree at 0x300000 46130267768eSMatthew McClintockUsing MPC85xx ADS machine description 46140267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 46150267768eSMatthew McClintock[snip] 46160267768eSMatthew McClintock 46170267768eSMatthew McClintock 46186069ff26SwdenkMore About U-Boot Image Types: 46196069ff26Swdenk------------------------------ 46206069ff26Swdenk 46216069ff26SwdenkU-Boot supports the following image types: 46226069ff26Swdenk 46236069ff26Swdenk "Standalone Programs" are directly runnable in the environment 46246069ff26Swdenk provided by U-Boot; it is expected that (if they behave 46256069ff26Swdenk well) you can continue to work in U-Boot after return from 46266069ff26Swdenk the Standalone Program. 46276069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 46286069ff26Swdenk will take over control completely. Usually these programs 46296069ff26Swdenk will install their own set of exception handlers, device 46306069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 46316069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 46326069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 46336069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 46346069ff26Swdenk being started. 46356069ff26Swdenk "Multi-File Images" contain several images, typically an OS 46366069ff26Swdenk (Linux) kernel image and one or more data images like 46376069ff26Swdenk RAMDisks. This construct is useful for instance when you want 46386069ff26Swdenk to boot over the network using BOOTP etc., where the boot 46396069ff26Swdenk server provides just a single image file, but you want to get 46406069ff26Swdenk for instance an OS kernel and a RAMDisk image. 46416069ff26Swdenk 46426069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 46436069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 46446069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 46456069ff26Swdenk Immediately after the terminating 0 follow the images, one by 46466069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 46476069ff26Swdenk a multiple of 4 bytes). 46486069ff26Swdenk 46496069ff26Swdenk "Firmware Images" are binary images containing firmware (like 46506069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 46516069ff26Swdenk flash memory. 46526069ff26Swdenk 46536069ff26Swdenk "Script files" are command sequences that will be executed by 46546069ff26Swdenk U-Boot's command interpreter; this feature is especially 46556069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 46566069ff26Swdenk as command interpreter. 46576069ff26Swdenk 465844f074c7SMarek VasutBooting the Linux zImage: 465944f074c7SMarek Vasut------------------------- 466044f074c7SMarek Vasut 466144f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 466244f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 466344f074c7SMarek Vasutas the syntax of "bootm" command. 466444f074c7SMarek Vasut 4665017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4666017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4667017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4668017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4669017e1f3fSMarek Vasut 4670c609719bSwdenk 4671c609719bSwdenkStandalone HOWTO: 4672c609719bSwdenk================= 4673c609719bSwdenk 4674c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4675c609719bSwdenkrun "standalone" applications, which can use some resources of 4676c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4677c609719bSwdenk 4678c609719bSwdenkTwo simple examples are included with the sources: 4679c609719bSwdenk 4680c609719bSwdenk"Hello World" Demo: 4681c609719bSwdenk------------------- 4682c609719bSwdenk 4683c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4684c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4685c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4686c609719bSwdenklike that: 4687c609719bSwdenk 4688c609719bSwdenk => loads 4689c609719bSwdenk ## Ready for S-Record download ... 4690c609719bSwdenk ~>examples/hello_world.srec 4691c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4692c609719bSwdenk [file transfer complete] 4693c609719bSwdenk [connected] 4694c609719bSwdenk ## Start Addr = 0x00040004 4695c609719bSwdenk 4696c609719bSwdenk => go 40004 Hello World! This is a test. 4697c609719bSwdenk ## Starting application at 0x00040004 ... 4698c609719bSwdenk Hello World 4699c609719bSwdenk argc = 7 4700c609719bSwdenk argv[0] = "40004" 4701c609719bSwdenk argv[1] = "Hello" 4702c609719bSwdenk argv[2] = "World!" 4703c609719bSwdenk argv[3] = "This" 4704c609719bSwdenk argv[4] = "is" 4705c609719bSwdenk argv[5] = "a" 4706c609719bSwdenk argv[6] = "test." 4707c609719bSwdenk argv[7] = "<NULL>" 4708c609719bSwdenk Hit any key to exit ... 4709c609719bSwdenk 4710c609719bSwdenk ## Application terminated, rc = 0x0 4711c609719bSwdenk 4712c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4713c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4714c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4715c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4716c609719bSwdenkcharacter, but this is just a demo program. The application can be 4717c609719bSwdenkcontrolled by the following keys: 4718c609719bSwdenk 4719c609719bSwdenk ? - print current values og the CPM Timer registers 4720c609719bSwdenk b - enable interrupts and start timer 4721c609719bSwdenk e - stop timer and disable interrupts 4722c609719bSwdenk q - quit application 4723c609719bSwdenk 4724c609719bSwdenk => loads 4725c609719bSwdenk ## Ready for S-Record download ... 4726c609719bSwdenk ~>examples/timer.srec 4727c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4728c609719bSwdenk [file transfer complete] 4729c609719bSwdenk [connected] 4730c609719bSwdenk ## Start Addr = 0x00040004 4731c609719bSwdenk 4732c609719bSwdenk => go 40004 4733c609719bSwdenk ## Starting application at 0x00040004 ... 4734c609719bSwdenk TIMERS=0xfff00980 4735c609719bSwdenk Using timer 1 4736c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4737c609719bSwdenk 4738c609719bSwdenkHit 'b': 4739c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4740c609719bSwdenk Enabling timer 4741c609719bSwdenkHit '?': 4742c609719bSwdenk [q, b, e, ?] ........ 4743c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4744c609719bSwdenkHit '?': 4745c609719bSwdenk [q, b, e, ?] . 4746c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4747c609719bSwdenkHit '?': 4748c609719bSwdenk [q, b, e, ?] . 4749c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4750c609719bSwdenkHit '?': 4751c609719bSwdenk [q, b, e, ?] . 4752c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4753c609719bSwdenkHit 'e': 4754c609719bSwdenk [q, b, e, ?] ...Stopping timer 4755c609719bSwdenkHit 'q': 4756c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4757c609719bSwdenk 4758c609719bSwdenk 475985ec0bccSwdenkMinicom warning: 476085ec0bccSwdenk================ 476185ec0bccSwdenk 47627152b1d0SwdenkOver time, many people have reported problems when trying to use the 476385ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 476485ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4765f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 476685ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4767e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 4768e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 4769e53515a2SKarl O. Pincfor help with kermit. 4770e53515a2SKarl O. Pinc 477185ec0bccSwdenk 477252f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 477352f52c14Swdenkconfiguration to your "File transfer protocols" section: 477452f52c14Swdenk 477552f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 477652f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 477752f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 477852f52c14Swdenk 477952f52c14Swdenk 4780c609719bSwdenkNetBSD Notes: 4781c609719bSwdenk============= 4782c609719bSwdenk 4783c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4784c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4785c609719bSwdenk 4786c609719bSwdenkBuilding requires a cross environment; it is known to work on 4787c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4788c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4789c609719bSwdenkNote that the cross-powerpc package does not install include files; 4790c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4791c609719bSwdenkmissing. This file has to be installed and patched manually: 4792c609719bSwdenk 4793c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4794c609719bSwdenk # mkdir powerpc 4795c609719bSwdenk # ln -s powerpc machine 4796c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4797c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4798c609719bSwdenk 4799c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4800c609719bSwdenkand U-Boot include files. 4801c609719bSwdenk 4802c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4803c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4804c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4805c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 48062a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4807c609719bSwdenk 4808c609719bSwdenk 4809c609719bSwdenkImplementation Internals: 4810c609719bSwdenk========================= 4811c609719bSwdenk 4812c609719bSwdenkThe following is not intended to be a complete description of every 4813c609719bSwdenkimplementation detail. However, it should help to understand the 4814c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4815c609719bSwdenkhardware. 4816c609719bSwdenk 4817c609719bSwdenk 4818c609719bSwdenkInitial Stack, Global Data: 4819c609719bSwdenk--------------------------- 4820c609719bSwdenk 4821c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4822c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4823c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4824c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4825c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4826c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4827c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4828c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4829c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4830c609719bSwdenklocked as (mis-) used as memory, etc. 4831c609719bSwdenk 48327152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 48330668236bSWolfgang Denk U-Boot mailing list: 483443d9616cSwdenk 483543d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 483643d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 483743d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 483843d9616cSwdenk ... 483943d9616cSwdenk 484043d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 484143d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 484243d9616cSwdenk require any physical RAM backing up the cache. The cleverness 484343d9616cSwdenk is that the cache is being used as a temporary supply of 484443d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 484511ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 484643d9616cSwdenk can see how this works by studying the cache architecture and 484743d9616cSwdenk operation in the architecture and processor-specific manuals. 484843d9616cSwdenk 484943d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 485043d9616cSwdenk is another option for the system designer to use as an 485111ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 485243d9616cSwdenk option should work for you. Using CS 4 should be fine if your 485343d9616cSwdenk board designers haven't used it for something that would 485443d9616cSwdenk cause you grief during the initial boot! It is frequently not 485543d9616cSwdenk used. 485643d9616cSwdenk 48576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 485843d9616cSwdenk with your processor/board/system design. The default value 485943d9616cSwdenk you will find in any recent u-boot distribution in 48608a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 486143d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 486243d9616cSwdenk it above 400_0000. Just make sure your board has no resources 486343d9616cSwdenk that are supposed to respond to that address! That code in 486443d9616cSwdenk start.S has been around a while and should work as is when 486543d9616cSwdenk you get the config right. 486643d9616cSwdenk 486743d9616cSwdenk -Chris Hallinan 486843d9616cSwdenk DS4.COM, Inc. 486943d9616cSwdenk 4870c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4871c609719bSwdenkcode for the initialization procedures: 4872c609719bSwdenk 4873c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4874c609719bSwdenk to write it. 4875c609719bSwdenk 487611ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4877c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 48787152b1d0Swdenk zation is performed later (when relocating to RAM). 4879c609719bSwdenk 4880c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4881c609719bSwdenk that. 4882c609719bSwdenk 4883c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4884c609719bSwdenknormal global data to share information beween the code. But it 4885c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4886c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4887c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4888c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4889c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4890c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4891c609719bSwdenkreserve for this purpose. 4892c609719bSwdenk 48937152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4894c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4895c609719bSwdenkGCC's implementation. 4896c609719bSwdenk 4897c609719bSwdenkFor PowerPC, the following registers have specific use: 4898c609719bSwdenk R1: stack pointer 4899e7670f6cSWolfgang Denk R2: reserved for system use 4900c609719bSwdenk R3-R4: parameter passing and return values 4901c609719bSwdenk R5-R10: parameter passing 4902c609719bSwdenk R13: small data area pointer 4903c609719bSwdenk R30: GOT pointer 4904c609719bSwdenk R31: frame pointer 4905c609719bSwdenk 4906e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4907e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4908e6bee808SJoakim Tjernlund going back and forth between asm and C) 4909c609719bSwdenk 4910e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4911c609719bSwdenk 4912c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4913c609719bSwdenk address of the global data structure is known at compile time), 4914c609719bSwdenk but it turned out that reserving a register results in somewhat 4915c609719bSwdenk smaller code - although the code savings are not that big (on 4916c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4917c609719bSwdenk 624 text + 127 data). 4918c609719bSwdenk 4919c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 49204c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 49214c58eb55SMike Frysinger 4922c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 49234c58eb55SMike Frysinger 4924c609719bSwdenkOn ARM, the following registers are used: 4925c609719bSwdenk 4926c609719bSwdenk R0: function argument word/integer result 4927c609719bSwdenk R1-R3: function argument word 4928c609719bSwdenk R9: GOT pointer 4929c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4930c609719bSwdenk R11: argument (frame) pointer 4931c609719bSwdenk R12: temporary workspace 4932c609719bSwdenk R13: stack pointer 4933c609719bSwdenk R14: link register 4934c609719bSwdenk R15: program counter 4935c609719bSwdenk 4936c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4937c609719bSwdenk 49380df01fd3SThomas ChouOn Nios II, the ABI is documented here: 49390df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 49400df01fd3SThomas Chou 49410df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 49420df01fd3SThomas Chou 49430df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 49440df01fd3SThomas Chou to access small data sections, so gp is free. 49450df01fd3SThomas Chou 4946afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4947afc1ce82SMacpaul Lin 4948afc1ce82SMacpaul Lin R0-R1: argument/return 4949afc1ce82SMacpaul Lin R2-R5: argument 4950afc1ce82SMacpaul Lin R15: temporary register for assembler 4951afc1ce82SMacpaul Lin R16: trampoline register 4952afc1ce82SMacpaul Lin R28: frame pointer (FP) 4953afc1ce82SMacpaul Lin R29: global pointer (GP) 4954afc1ce82SMacpaul Lin R30: link register (LP) 4955afc1ce82SMacpaul Lin R31: stack pointer (SP) 4956afc1ce82SMacpaul Lin PC: program counter (PC) 4957afc1ce82SMacpaul Lin 4958afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4959afc1ce82SMacpaul Lin 4960d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4961d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4962c609719bSwdenk 4963c609719bSwdenkMemory Management: 4964c609719bSwdenk------------------ 4965c609719bSwdenk 4966c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4967c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4968c609719bSwdenk 4969c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4970c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4971c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4972c609719bSwdenkphysical memory banks. 4973c609719bSwdenk 4974c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4975c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4976c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4977c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 49786d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4979c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4980c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4981c609719bSwdenk 4982c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4983c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4984c609719bSwdenk 4985c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4986c609719bSwdenkthis: 4987c609719bSwdenk 4988c609719bSwdenk 0x0000 0000 Exception Vector code 4989c609719bSwdenk : 4990c609719bSwdenk 0x0000 1FFF 4991c609719bSwdenk 0x0000 2000 Free for Application Use 4992c609719bSwdenk : 4993c609719bSwdenk : 4994c609719bSwdenk 4995c609719bSwdenk : 4996c609719bSwdenk : 4997c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4998c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4999c609719bSwdenk 0x00FC 0000 Malloc Arena 5000c609719bSwdenk : 5001c609719bSwdenk 0x00FD FFFF 5002c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5003c609719bSwdenk ... eventually: LCD or video framebuffer 5004c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5005c609719bSwdenk 0x00FF FFFF [End of RAM] 5006c609719bSwdenk 5007c609719bSwdenk 5008c609719bSwdenkSystem Initialization: 5009c609719bSwdenk---------------------- 5010c609719bSwdenk 5011c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 501211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5013c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 50147152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5015c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5016c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5017c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5018c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5019c609719bSwdenkthe caches and the SIU. 5020c609719bSwdenk 5021c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5022c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5023c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5024c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5025c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5026c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5027c609719bSwdenkbanks. 5028c609719bSwdenk 5029c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 50307152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5031c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5032c609719bSwdenk0x00000000, with any additional banks following immediately to create 5033c609719bSwdenkcontiguous memory starting from 0. 5034c609719bSwdenk 5035c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5036c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5037c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5038c609719bSwdenkpages, and the final stack is set up. 5039c609719bSwdenk 5040c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5041c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5042c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5043c609719bSwdenknew address in RAM. 5044c609719bSwdenk 5045c609719bSwdenk 5046c609719bSwdenkU-Boot Porting Guide: 5047c609719bSwdenk---------------------- 5048c609719bSwdenk 5049c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 50506aff3115Swdenklist, October 2002] 5051c609719bSwdenk 5052c609719bSwdenk 5053c609719bSwdenkint main(int argc, char *argv[]) 5054c609719bSwdenk{ 5055c609719bSwdenk sighandler_t no_more_time; 5056c609719bSwdenk 5057c609719bSwdenk signal(SIGALRM, no_more_time); 5058c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5059c609719bSwdenk 5060c609719bSwdenk if (available_money > available_manpower) { 50616c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5062c609719bSwdenk return 0; 5063c609719bSwdenk } 5064c609719bSwdenk 5065c609719bSwdenk Download latest U-Boot source; 5066c609719bSwdenk 50670668236bSWolfgang Denk Subscribe to u-boot mailing list; 50686aff3115Swdenk 50696c3fef28SJerry Van Baren if (clueless) 5070c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5071c609719bSwdenk 5072c609719bSwdenk while (learning) { 5073c609719bSwdenk Read the README file in the top level directory; 50747cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 50756c3fef28SJerry Van Baren Read applicable doc/*.README; 5076c609719bSwdenk Read the source, Luke; 50776c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5078c609719bSwdenk } 5079c609719bSwdenk 50806c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 50816c3fef28SJerry Van Baren Buy a BDI3000; 50826c3fef28SJerry Van Baren else 5083c609719bSwdenk Add a lot of aggravation and time; 5084c609719bSwdenk 50856c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 50866c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 50876c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 50886c3fef28SJerry Van Baren } else { 5089c609719bSwdenk Create your own board support subdirectory; 50906c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 50916c3fef28SJerry Van Baren } 50926c3fef28SJerry Van Baren Edit new board/<myboard> files 50936c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5094c609719bSwdenk 50956c3fef28SJerry Van Baren while (!accepted) { 5096c609719bSwdenk while (!running) { 5097c609719bSwdenk do { 5098c609719bSwdenk Add / modify source code; 5099c609719bSwdenk } until (compiles); 5100c609719bSwdenk Debug; 5101c609719bSwdenk if (clueless) 5102c609719bSwdenk email("Hi, I am having problems..."); 5103c609719bSwdenk } 51046c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 51056c3fef28SJerry Van Baren if (reasonable critiques) 51066c3fef28SJerry Van Baren Incorporate improvements from email list code review; 51076c3fef28SJerry Van Baren else 51086c3fef28SJerry Van Baren Defend code as written; 51096c3fef28SJerry Van Baren } 5110c609719bSwdenk 5111c609719bSwdenk return 0; 5112c609719bSwdenk} 5113c609719bSwdenk 5114c609719bSwdenkvoid no_more_time (int sig) 5115c609719bSwdenk{ 5116c609719bSwdenk hire_a_guru(); 5117c609719bSwdenk} 5118c609719bSwdenk 5119c609719bSwdenk 5120c609719bSwdenkCoding Standards: 5121c609719bSwdenk----------------- 5122c609719bSwdenk 5123c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 51242c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 51257ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5126c609719bSwdenk 51272c051651SDetlev ZundelSource files originating from a different project (for example the 51282c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 51292c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 51302c051651SDetlev Zundelsources. 51312c051651SDetlev Zundel 51322c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 51332c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 51342c051651SDetlev Zundelin your code. 5135c609719bSwdenk 5136c178d3daSwdenkPlease also stick to the following formatting rules: 5137180d3f74Swdenk- remove any trailing white space 51387ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5139180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 51407ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5141180d3f74Swdenk- do not add trailing empty lines to source files 5142180d3f74Swdenk 5143c609719bSwdenkSubmissions which do not conform to the standards may be returned 5144c609719bSwdenkwith a request to reformat the changes. 5145c609719bSwdenk 5146c609719bSwdenk 5147c609719bSwdenkSubmitting Patches: 5148c609719bSwdenk------------------- 5149c609719bSwdenk 5150c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5151c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5152c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5153c609719bSwdenk 51540d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5155218ca724SWolfgang Denk 51560668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 51570668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 51580668236bSWolfgang Denk 5159c609719bSwdenkWhen you send a patch, please include the following information with 5160c609719bSwdenkit: 5161c609719bSwdenk 5162c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5163c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5164c609719bSwdenk patch actually fixes something. 5165c609719bSwdenk 5166c609719bSwdenk* For new features: a description of the feature and your 5167c609719bSwdenk implementation. 5168c609719bSwdenk 5169c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5170c609719bSwdenk 5171c609719bSwdenk* For major contributions, your entry to the CREDITS file 5172c609719bSwdenk 5173c609719bSwdenk* When you add support for a new board, don't forget to add this 51747ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5175c609719bSwdenk 5176c609719bSwdenk* If your patch adds new configuration options, don't forget to 5177c609719bSwdenk document these in the README file. 5178c609719bSwdenk 5179218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5180218ca724SWolfgang Denk recommended) you can easily generate the patch using the 51817ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5182218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5183218ca724SWolfgang Denk with some other mail clients. 5184c609719bSwdenk 5185218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5186218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5187218ca724SWolfgang Denk GNU diff. 51886dff5529Swdenk 5189218ca724SWolfgang Denk The current directory when running this command shall be the parent 5190218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5191218ca724SWolfgang Denk your patch includes sufficient directory information for the 5192218ca724SWolfgang Denk affected files). 5193218ca724SWolfgang Denk 5194218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5195218ca724SWolfgang Denk and compressed attachments must not be used. 5196c609719bSwdenk 519752f52c14Swdenk* If one logical set of modifications affects or creates several 519852f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 519952f52c14Swdenk 520052f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 520152f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 520252f52c14Swdenk 520352f52c14Swdenk 5204c609719bSwdenkNotes: 5205c609719bSwdenk 5206c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5207c609719bSwdenk source tree and make sure that no errors or warnings are reported 5208c609719bSwdenk for any of the boards. 5209c609719bSwdenk 5210c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5211c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5212c609719bSwdenk returned with a request to re-formatting / split it. 5213c609719bSwdenk 5214c609719bSwdenk* If you modify existing code, make sure that your new code does not 5215c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5216c609719bSwdenk When adding new features, these should compile conditionally only 5217c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5218c609719bSwdenk disabled must not need more memory than the old code without your 5219c609719bSwdenk modification. 522090dc6704Swdenk 52210668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 52220668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 52230668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 52240668236bSWolfgang Denk bigger than the size limit should be avoided. 5225