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 147245d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 147345d7f525STom Wai-Hong Tam 147445d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 147545d7f525STom Wai-Hong Tam 147645d7f525STom Wai-Hong Tam 14777152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1478d791b1dcSwdenk 1479d791b1dcSwdenk If this option is set, the environment is checked for 1480d791b1dcSwdenk a variable "splashimage". If found, the usual display 1481d791b1dcSwdenk of logo, copyright and system information on the LCD 1482e94d2cd9Swdenk is suppressed and the BMP image at the address 1483d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1484d791b1dcSwdenk console is redirected to the "nulldev", too. This 1485d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1486d791b1dcSwdenk loaded very quickly after power-on. 1487d791b1dcSwdenk 14881ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 14891ca298ceSMatthias Weisser 14901ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 14911ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 14921ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 14931ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 14941ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 14951ca298ceSMatthias Weisser specify 'm' for centering the image. 14961ca298ceSMatthias Weisser 14971ca298ceSMatthias Weisser Example: 14981ca298ceSMatthias Weisser setenv splashpos m,m 14991ca298ceSMatthias Weisser => image at center of screen 15001ca298ceSMatthias Weisser 15011ca298ceSMatthias Weisser setenv splashpos 30,20 15021ca298ceSMatthias Weisser => image at x = 30 and y = 20 15031ca298ceSMatthias Weisser 15041ca298ceSMatthias Weisser setenv splashpos -10,m 15051ca298ceSMatthias Weisser => vertically centered image 15061ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 15071ca298ceSMatthias Weisser 150898f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 150998f4a3dfSStefan Roese 151098f4a3dfSStefan Roese If this option is set, additionally to standard BMP 151198f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 151298f4a3dfSStefan Roese splashscreen support or the bmp command. 151398f4a3dfSStefan Roese 1514d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1515d5011762SAnatolij Gustschin 1516d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1517d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1518d5011762SAnatolij Gustschin bmp command. 1519d5011762SAnatolij Gustschin 1520f2b96dfbSLei Wen- Do compresssing for memory range: 1521f2b96dfbSLei Wen CONFIG_CMD_ZIP 1522f2b96dfbSLei Wen 1523f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1524f2b96dfbSLei Wen to compress the specified memory at its best effort. 1525f2b96dfbSLei Wen 1526c29fdfc1Swdenk- Compression support: 1527c29fdfc1Swdenk CONFIG_BZIP2 1528c29fdfc1Swdenk 1529c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1530c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1531c29fdfc1Swdenk compressed images are supported. 1532c29fdfc1Swdenk 1533c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 15346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1535c29fdfc1Swdenk be at least 4MB. 1536d791b1dcSwdenk 1537fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1538fc9c1727SLuigi 'Comio' Mantellini 1539fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1540fc9c1727SLuigi 'Comio' Mantellini images is included. 1541fc9c1727SLuigi 'Comio' Mantellini 1542fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1543fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1544fc9c1727SLuigi 'Comio' Mantellini formula: 1545fc9c1727SLuigi 'Comio' Mantellini 1546fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1547fc9c1727SLuigi 'Comio' Mantellini 1548fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1549fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1550fc9c1727SLuigi 'Comio' Mantellini 1551fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1552fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1553fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1554fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1555fc9c1727SLuigi 'Comio' Mantellini 1556fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1557fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 15586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1559fc9c1727SLuigi 'Comio' Mantellini 156017ea1177Swdenk- MII/PHY support: 156117ea1177Swdenk CONFIG_PHY_ADDR 156217ea1177Swdenk 156317ea1177Swdenk The address of PHY on MII bus. 156417ea1177Swdenk 156517ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 156617ea1177Swdenk 156717ea1177Swdenk The clock frequency of the MII bus 156817ea1177Swdenk 156917ea1177Swdenk CONFIG_PHY_GIGE 157017ea1177Swdenk 157117ea1177Swdenk If this option is set, support for speed/duplex 157211ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 157317ea1177Swdenk 157417ea1177Swdenk CONFIG_PHY_RESET_DELAY 157517ea1177Swdenk 157617ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 157717ea1177Swdenk reset before any MII register access is possible. 157817ea1177Swdenk For such PHY, set this option to the usec delay 157917ea1177Swdenk required. (minimum 300usec for LXT971A) 158017ea1177Swdenk 158117ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 158217ea1177Swdenk 158317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 158417ea1177Swdenk command issued before MII status register can be read 158517ea1177Swdenk 1586c609719bSwdenk- Ethernet address: 1587c609719bSwdenk CONFIG_ETHADDR 1588c68a05feSrichardretanubun CONFIG_ETH1ADDR 1589c609719bSwdenk CONFIG_ETH2ADDR 1590c609719bSwdenk CONFIG_ETH3ADDR 1591c68a05feSrichardretanubun CONFIG_ETH4ADDR 1592c68a05feSrichardretanubun CONFIG_ETH5ADDR 1593c609719bSwdenk 159411ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 159511ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1596c609719bSwdenk is not determined automatically. 1597c609719bSwdenk 1598c609719bSwdenk- IP address: 1599c609719bSwdenk CONFIG_IPADDR 1600c609719bSwdenk 1601c609719bSwdenk Define a default value for the IP address to use for 160211ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1603c609719bSwdenk determined through e.g. bootp. 16041ebcd654SWolfgang Denk (Environment variable "ipaddr") 1605c609719bSwdenk 1606c609719bSwdenk- Server IP address: 1607c609719bSwdenk CONFIG_SERVERIP 1608c609719bSwdenk 1609c609719bSwdenk Defines a default value for the IP address of a TFTP 1610c609719bSwdenk server to contact when using the "tftboot" command. 16111ebcd654SWolfgang Denk (Environment variable "serverip") 1612c609719bSwdenk 161397cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 161497cfe861SRobin Getz 161597cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 161697cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 161797cfe861SRobin Getz 16181ebcd654SWolfgang Denk- Gateway IP address: 16191ebcd654SWolfgang Denk CONFIG_GATEWAYIP 16201ebcd654SWolfgang Denk 16211ebcd654SWolfgang Denk Defines a default value for the IP address of the 16221ebcd654SWolfgang Denk default router where packets to other networks are 16231ebcd654SWolfgang Denk sent to. 16241ebcd654SWolfgang Denk (Environment variable "gatewayip") 16251ebcd654SWolfgang Denk 16261ebcd654SWolfgang Denk- Subnet mask: 16271ebcd654SWolfgang Denk CONFIG_NETMASK 16281ebcd654SWolfgang Denk 16291ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 16301ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 16311ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 16321ebcd654SWolfgang Denk forwarded through a router. 16331ebcd654SWolfgang Denk (Environment variable "netmask") 16341ebcd654SWolfgang Denk 163553a5c424SDavid Updegraff- Multicast TFTP Mode: 163653a5c424SDavid Updegraff CONFIG_MCAST_TFTP 163753a5c424SDavid Updegraff 163853a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 163953a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 164011ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 164153a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 164253a5c424SDavid Updegraff multicast group. 164353a5c424SDavid Updegraff 1644c609719bSwdenk- BOOTP Recovery Mode: 1645c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1646c609719bSwdenk 1647c609719bSwdenk If you have many targets in a network that try to 1648c609719bSwdenk boot using BOOTP, you may want to avoid that all 1649c609719bSwdenk systems send out BOOTP requests at precisely the same 1650c609719bSwdenk moment (which would happen for instance at recovery 1651c609719bSwdenk from a power failure, when all systems will try to 1652c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1653c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1654c609719bSwdenk inserted before sending out BOOTP requests. The 16556c33c785SWolfgang Denk following delays are inserted then: 1656c609719bSwdenk 1657c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1658c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1659c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1660c609719bSwdenk 4th and following 1661c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1662c609719bSwdenk 1663fe389a82Sstroese- DHCP Advanced Options: 16641fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 16651fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1666fe389a82Sstroese 16671fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 16681fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 16691fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 16701fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 16711fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 16721fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 16731fe80d79SJon Loeliger CONFIG_BOOTP_DNS 16741fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 16751fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 16761fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 16771fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 16781fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 16792c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1680fe389a82Sstroese 16815d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 16825d110f0aSWilson Callan environment variable, not the BOOTP server. 1683fe389a82Sstroese 16842c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 16852c00e099SJoe Hershberger after the configured retry count, the call will fail 16862c00e099SJoe Hershberger instead of starting over. This can be used to fail over 16872c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 16882c00e099SJoe Hershberger is not available. 16892c00e099SJoe Hershberger 1690fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1691fe389a82Sstroese serverip from a DHCP server, it is possible that more 1692fe389a82Sstroese than one DNS serverip is offered to the client. 1693fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1694fe389a82Sstroese serverip will be stored in the additional environment 1695fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1696fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 16971fe80d79SJon Loeliger is defined. 1698fe389a82Sstroese 1699fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1700fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1701fe389a82Sstroese need the hostname of the DHCP requester. 17025d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 17031fe80d79SJon Loeliger of the "hostname" environment variable is passed as 17041fe80d79SJon Loeliger option 12 to the DHCP server. 1705fe389a82Sstroese 1706d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1707d9a2f416SAras Vaichas 1708d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1709d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1710d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1711d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1712d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1713d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1714d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1715d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1716d9a2f416SAras Vaichas that one of the retries will be successful but note that 1717d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1718d9a2f416SAras Vaichas this delay. 1719d9a2f416SAras Vaichas 1720d22c338eSJoe Hershberger - Link-local IP address negotiation: 1721d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1722d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1723d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1724d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1725d22c338eSJoe Hershberger 1726d22c338eSJoe Hershberger See doc/README.link-local for more information. 1727d22c338eSJoe Hershberger 1728a3d991bdSwdenk - CDP Options: 1729a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1730a3d991bdSwdenk 1731a3d991bdSwdenk The device id used in CDP trigger frames. 1732a3d991bdSwdenk 1733a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1734a3d991bdSwdenk 1735a3d991bdSwdenk A two character string which is prefixed to the MAC address 1736a3d991bdSwdenk of the device. 1737a3d991bdSwdenk 1738a3d991bdSwdenk CONFIG_CDP_PORT_ID 1739a3d991bdSwdenk 1740a3d991bdSwdenk A printf format string which contains the ascii name of 1741a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 174211ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1743a3d991bdSwdenk 1744a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1745a3d991bdSwdenk 1746a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1747a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1748a3d991bdSwdenk 1749a3d991bdSwdenk CONFIG_CDP_VERSION 1750a3d991bdSwdenk 1751a3d991bdSwdenk An ascii string containing the version of the software. 1752a3d991bdSwdenk 1753a3d991bdSwdenk CONFIG_CDP_PLATFORM 1754a3d991bdSwdenk 1755a3d991bdSwdenk An ascii string containing the name of the platform. 1756a3d991bdSwdenk 1757a3d991bdSwdenk CONFIG_CDP_TRIGGER 1758a3d991bdSwdenk 1759a3d991bdSwdenk A 32bit integer sent on the trigger. 1760a3d991bdSwdenk 1761a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1762a3d991bdSwdenk 1763a3d991bdSwdenk A 16bit integer containing the power consumption of the 1764a3d991bdSwdenk device in .1 of milliwatts. 1765a3d991bdSwdenk 1766a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1767a3d991bdSwdenk 1768a3d991bdSwdenk A byte containing the id of the VLAN. 1769a3d991bdSwdenk 1770c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1771c609719bSwdenk 1772c609719bSwdenk Several configurations allow to display the current 1773c609719bSwdenk status using a LED. For instance, the LED will blink 1774c609719bSwdenk fast while running U-Boot code, stop blinking as 1775c609719bSwdenk soon as a reply to a BOOTP request was received, and 1776c609719bSwdenk start blinking slow once the Linux kernel is running 1777c609719bSwdenk (supported by a status LED driver in the Linux 1778c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1779c609719bSwdenk feature in U-Boot. 1780c609719bSwdenk 1781c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1782c609719bSwdenk 1783c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1784c609719bSwdenk on those systems that support this (optional) 1785c609719bSwdenk feature, like the TQM8xxL modules. 1786c609719bSwdenk 1787c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1788c609719bSwdenk 1789b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1790b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 179111ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1792c609719bSwdenk 1793b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1794602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1795b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1796b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1797c609719bSwdenk command line interface. 1798c609719bSwdenk 1799bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1800c609719bSwdenk 1801b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1802b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1803b37c7e5eSwdenk support for I2C. 1804c609719bSwdenk 1805b37c7e5eSwdenk There are several other quantities that must also be 1806b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1807c609719bSwdenk 18086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1809b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 18106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 181111ccc33fSMarcel Ziswiler the CPU's i2c node address). 1812c609719bSwdenk 18138d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1814a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 18158d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 18168d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 18178d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1818b37c7e5eSwdenk 18195da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 18205da71efaSEric Millbrandt 18215da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 18225da71efaSEric Millbrandt chips might think that the current transfer is still 18235da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 18245da71efaSEric Millbrandt commands until the slave device responds. 18255da71efaSEric Millbrandt 1826b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1827b37c7e5eSwdenk 1828b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1829b37c7e5eSwdenk then the following macros need to be defined (examples are 1830b37c7e5eSwdenk from include/configs/lwmon.h): 1831c609719bSwdenk 1832c609719bSwdenk I2C_INIT 1833c609719bSwdenk 1834b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1835c609719bSwdenk controller or configure ports. 1836c609719bSwdenk 1837b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1838b37c7e5eSwdenk 1839c609719bSwdenk I2C_PORT 1840c609719bSwdenk 1841c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1842c609719bSwdenk assumes both bits are on the same port). Valid values 1843c609719bSwdenk are 0..3 for ports A..D. 1844c609719bSwdenk 1845c609719bSwdenk I2C_ACTIVE 1846c609719bSwdenk 1847c609719bSwdenk The code necessary to make the I2C data line active 1848c609719bSwdenk (driven). If the data line is open collector, this 1849c609719bSwdenk define can be null. 1850c609719bSwdenk 1851b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1852b37c7e5eSwdenk 1853c609719bSwdenk I2C_TRISTATE 1854c609719bSwdenk 1855c609719bSwdenk The code necessary to make the I2C data line tri-stated 1856c609719bSwdenk (inactive). If the data line is open collector, this 1857c609719bSwdenk define can be null. 1858c609719bSwdenk 1859b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1860b37c7e5eSwdenk 1861c609719bSwdenk I2C_READ 1862c609719bSwdenk 1863c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1864c609719bSwdenk FALSE if it is low. 1865c609719bSwdenk 1866b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1867b37c7e5eSwdenk 1868c609719bSwdenk I2C_SDA(bit) 1869c609719bSwdenk 1870c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1871c609719bSwdenk is FALSE, it clears it (low). 1872c609719bSwdenk 1873b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1874b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1875b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1876b37c7e5eSwdenk 1877c609719bSwdenk I2C_SCL(bit) 1878c609719bSwdenk 1879c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1880c609719bSwdenk is FALSE, it clears it (low). 1881c609719bSwdenk 1882b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1883b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1884b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1885b37c7e5eSwdenk 1886c609719bSwdenk I2C_DELAY 1887c609719bSwdenk 1888c609719bSwdenk This delay is invoked four times per clock cycle so this 1889c609719bSwdenk controls the rate of data transfer. The data rate thus 1890b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1891b37c7e5eSwdenk like: 1892b37c7e5eSwdenk 1893b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1894c609719bSwdenk 1895793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1896793b5726SMike Frysinger 1897793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1898793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1899793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1900793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1901793b5726SMike Frysinger 1902793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1903793b5726SMike Frysinger the generic GPIO functions. 1904793b5726SMike Frysinger 19056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 190647cd00faSwdenk 190747cd00faSwdenk When a board is reset during an i2c bus transfer 190847cd00faSwdenk chips might think that the current transfer is still 190947cd00faSwdenk in progress. On some boards it is possible to access 191047cd00faSwdenk the i2c SCLK line directly, either by using the 191147cd00faSwdenk processor pin as a GPIO or by having a second pin 191247cd00faSwdenk connected to the bus. If this option is defined a 191347cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 191447cd00faSwdenk is run early in the boot sequence. 191547cd00faSwdenk 191626a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 191726a33504SRichard Retanubun 191826a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 191926a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 192026a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 192126a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 192226a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 192326a33504SRichard Retanubun controller provide such a method. It is called at the end of 192426a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 192526a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 192626a33504SRichard Retanubun 192717ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 192817ea1177Swdenk 192917ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 193017ea1177Swdenk in u-boot bd_info structure based on u-boot environment 193117ea1177Swdenk variable "i2cfast". (see also i2cfast) 193217ea1177Swdenk 1933bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1934bb99ad6dSBen Warren 1935bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1936bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1937bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1938bb99ad6dSBen Warren Note that bus numbering is zero-based. 1939bb99ad6dSBen Warren 19406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1941bb99ad6dSBen Warren 1942bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 19430f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 19440f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 19450f89c54bSPeter Tyser a 1D array of device addresses 1946bb99ad6dSBen Warren 1947bb99ad6dSBen Warren e.g. 1948bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 19496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1950bb99ad6dSBen Warren 1951bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1952bb99ad6dSBen Warren 1953bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 19546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1955bb99ad6dSBen Warren 1956bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1957bb99ad6dSBen Warren 19586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1959be5e6181STimur Tabi 1960be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1961be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1962be5e6181STimur Tabi 19636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 19640dc018ecSStefan Roese 19650dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 19660dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 19670dc018ecSStefan Roese 19686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 19690dc018ecSStefan Roese 19700dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 19710dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 19720dc018ecSStefan Roese 19736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 19749ebbb54fSVictor Gallardo 19759ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 19769ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 19779ebbb54fSVictor Gallardo specified DTT device. 19789ebbb54fSVictor Gallardo 1979be5e6181STimur Tabi CONFIG_FSL_I2C 1980be5e6181STimur Tabi 1981be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 19827817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1983be5e6181STimur Tabi 198467b23a32SHeiko Schocher CONFIG_I2C_MUX 198567b23a32SHeiko Schocher 198667b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 198767b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 198867b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 198967b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 199067b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 199167b23a32SHeiko Schocher the muxes to activate this new "bus". 199267b23a32SHeiko Schocher 199367b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 199467b23a32SHeiko Schocher feature! 199567b23a32SHeiko Schocher 199667b23a32SHeiko Schocher Example: 199767b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 199867b23a32SHeiko Schocher The First mux with address 70 and channel 6 199967b23a32SHeiko Schocher The Second mux with address 71 and channel 4 200067b23a32SHeiko Schocher 200167b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 200267b23a32SHeiko Schocher 200367b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 200467b23a32SHeiko Schocher of I2C Busses with muxes: 200567b23a32SHeiko Schocher 200667b23a32SHeiko Schocher => i2c bus 200767b23a32SHeiko Schocher Busses reached over muxes: 200867b23a32SHeiko Schocher Bus ID: 2 200967b23a32SHeiko Schocher reached over Mux(es): 201067b23a32SHeiko Schocher pca9544a@70 ch: 4 201167b23a32SHeiko Schocher Bus ID: 3 201267b23a32SHeiko Schocher reached over Mux(es): 201367b23a32SHeiko Schocher pca9544a@70 ch: 6 201467b23a32SHeiko Schocher pca9544a@71 ch: 4 201567b23a32SHeiko Schocher => 201667b23a32SHeiko Schocher 201767b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 2018f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 2019f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 202067b23a32SHeiko Schocher the channel 4. 202167b23a32SHeiko Schocher 202267b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 2023f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 202467b23a32SHeiko Schocher the 2 muxes. 202567b23a32SHeiko Schocher 202667b23a32SHeiko Schocher This option is actually implemented for the bitbanging 202767b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 202867b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 202967b23a32SHeiko Schocher to add this option to other architectures. 203067b23a32SHeiko Schocher 20312ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 20322ac6985aSAndrew Dyer 20332ac6985aSAndrew Dyer defining this will force the i2c_read() function in 20342ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 20352ac6985aSAndrew Dyer between writing the address pointer and reading the 20362ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 20372ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 20382ac6985aSAndrew Dyer devices can use either method, but some require one or 20392ac6985aSAndrew Dyer the other. 2040be5e6181STimur Tabi 2041c609719bSwdenk- SPI Support: CONFIG_SPI 2042c609719bSwdenk 2043c609719bSwdenk Enables SPI driver (so far only tested with 2044c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2045c609719bSwdenk D/As on the SACSng board) 2046c609719bSwdenk 20476639562eSYoshihiro Shimoda CONFIG_SH_SPI 20486639562eSYoshihiro Shimoda 20496639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 20506639562eSYoshihiro Shimoda only SH7757 is supported. 20516639562eSYoshihiro Shimoda 2052c609719bSwdenk CONFIG_SPI_X 2053c609719bSwdenk 2054c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2055c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2056c609719bSwdenk 2057c609719bSwdenk CONFIG_SOFT_SPI 2058c609719bSwdenk 2059c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2060c609719bSwdenk using hardware support. This is a general purpose 2061c609719bSwdenk driver that only requires three general I/O port pins 2062c609719bSwdenk (two outputs, one input) to function. If this is 2063c609719bSwdenk defined, the board configuration must define several 2064c609719bSwdenk SPI configuration items (port pins to use, etc). For 2065c609719bSwdenk an example, see include/configs/sacsng.h. 2066c609719bSwdenk 206704a9e118SBen Warren CONFIG_HARD_SPI 206804a9e118SBen Warren 206904a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 207004a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 207104a9e118SBen Warren must define a list of chip-select function pointers. 207204a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 207304a9e118SBen Warren example, see include/configs/mpc8349emds.h. 207404a9e118SBen Warren 207538254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 207638254f45SGuennadi Liakhovetski 207738254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 20782e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 207938254f45SGuennadi Liakhovetski 20800133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 20810133502eSMatthias Fuchs 20820133502eSMatthias Fuchs Enables FPGA subsystem. 20830133502eSMatthias Fuchs 20840133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 20850133502eSMatthias Fuchs 20860133502eSMatthias Fuchs Enables support for specific chip vendors. 20870133502eSMatthias Fuchs (ALTERA, XILINX) 20880133502eSMatthias Fuchs 20890133502eSMatthias Fuchs CONFIG_FPGA_<family> 20900133502eSMatthias Fuchs 20910133502eSMatthias Fuchs Enables support for FPGA family. 20920133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 20930133502eSMatthias Fuchs 20940133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2095c609719bSwdenk 2096c609719bSwdenk Specify the number of FPGA devices to support. 2097c609719bSwdenk 20986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2099c609719bSwdenk 2100c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2101c609719bSwdenk 21026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2103c609719bSwdenk 2104c609719bSwdenk Enable checks on FPGA configuration interface busy 2105c609719bSwdenk status by the configuration function. This option 2106c609719bSwdenk will require a board or device specific function to 2107c609719bSwdenk be written. 2108c609719bSwdenk 2109c609719bSwdenk CONFIG_FPGA_DELAY 2110c609719bSwdenk 2111c609719bSwdenk If defined, a function that provides delays in the FPGA 2112c609719bSwdenk configuration driver. 2113c609719bSwdenk 21146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2115c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2116c609719bSwdenk 21176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2118c609719bSwdenk 2119c609719bSwdenk Check for configuration errors during FPGA bitfile 2120c609719bSwdenk loading. For example, abort during Virtex II 2121c609719bSwdenk configuration if the INIT_B line goes low (which 2122c609719bSwdenk indicated a CRC error). 2123c609719bSwdenk 21246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2125c609719bSwdenk 2126c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2127c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2128c609719bSwdenk FPGA configuration sequence. The default time is 500 212911ccc33fSMarcel Ziswiler ms. 2130c609719bSwdenk 21316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2132c609719bSwdenk 2133c609719bSwdenk Maximum time to wait for BUSY to deassert during 213411ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2135c609719bSwdenk 21366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2137c609719bSwdenk 2138c609719bSwdenk Time to wait after FPGA configuration. The default is 213911ccc33fSMarcel Ziswiler 200 ms. 2140c609719bSwdenk 2141c609719bSwdenk- Configuration Management: 2142c609719bSwdenk CONFIG_IDENT_STRING 2143c609719bSwdenk 2144c609719bSwdenk If defined, this string will be added to the U-Boot 2145c609719bSwdenk version information (U_BOOT_VERSION) 2146c609719bSwdenk 2147c609719bSwdenk- Vendor Parameter Protection: 2148c609719bSwdenk 2149c609719bSwdenk U-Boot considers the values of the environment 2150c609719bSwdenk variables "serial#" (Board Serial Number) and 21517152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2152c609719bSwdenk are set once by the board vendor / manufacturer, and 2153c609719bSwdenk protects these variables from casual modification by 2154c609719bSwdenk the user. Once set, these variables are read-only, 2155c609719bSwdenk and write or delete attempts are rejected. You can 215611ccc33fSMarcel Ziswiler change this behaviour: 2157c609719bSwdenk 2158c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2159c609719bSwdenk file, the write protection for vendor parameters is 216047cd00faSwdenk completely disabled. Anybody can change or delete 2161c609719bSwdenk these parameters. 2162c609719bSwdenk 2163c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2164c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 216511ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2166c609719bSwdenk which can be changed exactly ONCE by the user. [The 2167c609719bSwdenk serial# is unaffected by this, i. e. it remains 2168c609719bSwdenk read-only.] 2169c609719bSwdenk 2170c609719bSwdenk- Protected RAM: 2171c609719bSwdenk CONFIG_PRAM 2172c609719bSwdenk 2173c609719bSwdenk Define this variable to enable the reservation of 2174c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2175c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2176c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2177c609719bSwdenk this default value by defining an environment 2178c609719bSwdenk variable "pram" to the number of kB you want to 2179c609719bSwdenk reserve. Note that the board info structure will 2180c609719bSwdenk still show the full amount of RAM. If pRAM is 2181c609719bSwdenk reserved, a new environment variable "mem" will 2182c609719bSwdenk automatically be defined to hold the amount of 2183c609719bSwdenk remaining RAM in a form that can be passed as boot 2184c609719bSwdenk argument to Linux, for instance like that: 2185c609719bSwdenk 2186fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2187c609719bSwdenk saveenv 2188c609719bSwdenk 2189c609719bSwdenk This way you can tell Linux not to use this memory, 2190c609719bSwdenk either, which results in a memory region that will 2191c609719bSwdenk not be affected by reboots. 2192c609719bSwdenk 2193c609719bSwdenk *WARNING* If your board configuration uses automatic 2194c609719bSwdenk detection of the RAM size, you must make sure that 2195c609719bSwdenk this memory test is non-destructive. So far, the 2196c609719bSwdenk following board configurations are known to be 2197c609719bSwdenk "pRAM-clean": 2198c609719bSwdenk 21991b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 22001b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2201544d97e9SWolfgang Denk FLAGADM, TQM8260 2202c609719bSwdenk 2203c609719bSwdenk- Error Recovery: 2204c609719bSwdenk CONFIG_PANIC_HANG 2205c609719bSwdenk 2206c609719bSwdenk Define this variable to stop the system in case of a 2207c609719bSwdenk fatal error, so that you have to reset it manually. 2208c609719bSwdenk This is probably NOT a good idea for an embedded 220911ccc33fSMarcel Ziswiler system where you want the system to reboot 2210c609719bSwdenk automatically as fast as possible, but it may be 2211c609719bSwdenk useful during development since you can try to debug 2212c609719bSwdenk the conditions that lead to the situation. 2213c609719bSwdenk 2214c609719bSwdenk CONFIG_NET_RETRY_COUNT 2215c609719bSwdenk 2216c609719bSwdenk This variable defines the number of retries for 2217c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2218c609719bSwdenk before giving up the operation. If not defined, a 2219c609719bSwdenk default value of 5 is used. 2220c609719bSwdenk 222140cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 222240cb90eeSGuennadi Liakhovetski 222340cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 222440cb90eeSGuennadi Liakhovetski 222548a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 222648a3e999STetsuyuki Kobayashi 222748a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 222848a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 222948a3e999STetsuyuki Kobayashi try longer timeout such as 223048a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 223148a3e999STetsuyuki Kobayashi 2232c609719bSwdenk- Command Interpreter: 22338078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 223404a85b3bSwdenk 223504a85b3bSwdenk Enable auto completion of commands using TAB. 223604a85b3bSwdenk 22378078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 22388078f1a5SWolfgang Denk for the "hush" shell. 22398078f1a5SWolfgang Denk 22408078f1a5SWolfgang Denk 22416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2242c609719bSwdenk 2243c609719bSwdenk Define this variable to enable the "hush" shell (from 2244c609719bSwdenk Busybox) as command line interpreter, thus enabling 2245c609719bSwdenk powerful command line syntax like 2246c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2247c609719bSwdenk constructs ("shell scripts"). 2248c609719bSwdenk 2249c609719bSwdenk If undefined, you get the old, much simpler behaviour 2250c609719bSwdenk with a somewhat smaller memory footprint. 2251c609719bSwdenk 2252c609719bSwdenk 22536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2254c609719bSwdenk 2255c609719bSwdenk This defines the secondary prompt string, which is 2256c609719bSwdenk printed when the command interpreter needs more input 2257c609719bSwdenk to complete a command. Usually "> ". 2258c609719bSwdenk 2259c609719bSwdenk Note: 2260c609719bSwdenk 2261c609719bSwdenk In the current implementation, the local variables 2262c609719bSwdenk space and global environment variables space are 2263c609719bSwdenk separated. Local variables are those you define by 22643b57fe0aSwdenk simply typing `name=value'. To access a local 2265c609719bSwdenk variable later on, you have write `$name' or 22663b57fe0aSwdenk `${name}'; to execute the contents of a variable 22673b57fe0aSwdenk directly type `$name' at the command prompt. 2268c609719bSwdenk 2269c609719bSwdenk Global environment variables are those you use 2270c609719bSwdenk setenv/printenv to work with. To run a command stored 2271c609719bSwdenk in such a variable, you need to use the run command, 2272c609719bSwdenk and you must not use the '$' sign to access them. 2273c609719bSwdenk 2274c609719bSwdenk To store commands and special characters in a 2275c609719bSwdenk variable, please use double quotation marks 2276c609719bSwdenk surrounding the whole text of the variable, instead 2277c609719bSwdenk of the backslashes before semicolons and special 2278c609719bSwdenk symbols. 2279c609719bSwdenk 2280aa0c71acSWolfgang Denk- Commandline Editing and History: 2281aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2282aa0c71acSWolfgang Denk 228311ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2284aa0c71acSWolfgang Denk commandline input operations 2285aa0c71acSWolfgang Denk 2286a8c7c708Swdenk- Default Environment: 2287c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2288c609719bSwdenk 2289c609719bSwdenk Define this to contain any number of null terminated 2290c609719bSwdenk strings (variable = value pairs) that will be part of 22917152b1d0Swdenk the default environment compiled into the boot image. 22922262cfeeSwdenk 2293c609719bSwdenk For example, place something like this in your 2294c609719bSwdenk board's config file: 2295c609719bSwdenk 2296c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2297c609719bSwdenk "myvar1=value1\0" \ 2298c609719bSwdenk "myvar2=value2\0" 2299c609719bSwdenk 2300c609719bSwdenk Warning: This method is based on knowledge about the 2301c609719bSwdenk internal format how the environment is stored by the 23022262cfeeSwdenk U-Boot code. This is NOT an official, exported 2303c609719bSwdenk interface! Although it is unlikely that this format 23047152b1d0Swdenk will change soon, there is no guarantee either. 2305c609719bSwdenk You better know what you are doing here. 2306c609719bSwdenk 2307c609719bSwdenk Note: overly (ab)use of the default environment is 2308c609719bSwdenk discouraged. Make sure to check other ways to preset 230974de7aefSWolfgang Denk the environment like the "source" command or the 2310c609719bSwdenk boot command first. 2311c609719bSwdenk 23125e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 23135e724ca2SStephen Warren 23145e724ca2SStephen Warren Define this in order to add variables describing the 23155e724ca2SStephen Warren U-Boot build configuration to the default environment. 23165e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 23175e724ca2SStephen Warren 23185e724ca2SStephen Warren Enabling this option will cause the following to be defined: 23195e724ca2SStephen Warren 23205e724ca2SStephen Warren - CONFIG_SYS_ARCH 23215e724ca2SStephen Warren - CONFIG_SYS_CPU 23225e724ca2SStephen Warren - CONFIG_SYS_BOARD 23235e724ca2SStephen Warren - CONFIG_SYS_VENDOR 23245e724ca2SStephen Warren - CONFIG_SYS_SOC 23255e724ca2SStephen Warren 23267e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 23277e27f89fSTom Rini 23287e27f89fSTom Rini Define this in order to add variables describing certain 23297e27f89fSTom Rini run-time determined information about the hardware to the 23307e27f89fSTom Rini environment. These will be named board_name, board_rev. 23317e27f89fSTom Rini 2332a8c7c708Swdenk- DataFlash Support: 23332abbe075Swdenk CONFIG_HAS_DATAFLASH 23342abbe075Swdenk 23352abbe075Swdenk Defining this option enables DataFlash features and 23362abbe075Swdenk allows to read/write in Dataflash via the standard 23372abbe075Swdenk commands cp, md... 23382abbe075Swdenk 2339f61ec45eSEric Nelson- Serial Flash support 2340f61ec45eSEric Nelson CONFIG_CMD_SF 2341f61ec45eSEric Nelson 2342f61ec45eSEric Nelson Defining this option enables SPI flash commands 2343f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2344f61ec45eSEric Nelson 2345f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2346f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2347f61ec45eSEric Nelson commands. 2348f61ec45eSEric Nelson 2349f61ec45eSEric Nelson The following defaults may be provided by the platform 2350f61ec45eSEric Nelson to handle the common case when only a single serial 2351f61ec45eSEric Nelson flash is present on the system. 2352f61ec45eSEric Nelson 2353f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2354f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2355f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2356f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2357f61ec45eSEric Nelson 23583f85ce27Swdenk- SystemACE Support: 23593f85ce27Swdenk CONFIG_SYSTEMACE 23603f85ce27Swdenk 23613f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 23623f85ce27Swdenk chips attached via some sort of local bus. The address 236311ccc33fSMarcel Ziswiler of the chip must also be defined in the 23646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 23653f85ce27Swdenk 23663f85ce27Swdenk #define CONFIG_SYSTEMACE 23676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 23683f85ce27Swdenk 23693f85ce27Swdenk When SystemACE support is added, the "ace" device type 23703f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 23713f85ce27Swdenk 2372ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2373ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2374ecb0ccd9SWolfgang Denk 237528cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2376ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 237728cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2378ecb0ccd9SWolfgang Denk number generator is used. 2379ecb0ccd9SWolfgang Denk 238028cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 238128cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 238228cb9375SWolfgang Denk defined, the normal port 69 is used. 238328cb9375SWolfgang Denk 238428cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2385ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2386ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2387ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2388ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2389ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2390ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2391ecb0ccd9SWolfgang Denk 2392a8c7c708Swdenk- Show boot progress: 2393c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2394c609719bSwdenk 2395c609719bSwdenk Defining this option allows to add some board- 2396c609719bSwdenk specific code (calling a user-provided function 2397c609719bSwdenk "show_boot_progress(int)") that enables you to show 2398c609719bSwdenk the system's boot progress on some display (for 2399c609719bSwdenk example, some LED's) on your board. At the moment, 2400c609719bSwdenk the following checkpoints are implemented: 2401c609719bSwdenk 24023a608ca0SSimon Glass- Detailed boot stage timing 24033a608ca0SSimon Glass CONFIG_BOOTSTAGE 24043a608ca0SSimon Glass Define this option to get detailed timing of each stage 24053a608ca0SSimon Glass of the boot process. 24063a608ca0SSimon Glass 24073a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 24083a608ca0SSimon Glass This is the number of available user bootstage records. 24093a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 24103a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 24113a608ca0SSimon Glass the limit, recording will stop. 24123a608ca0SSimon Glass 24133a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 24143a608ca0SSimon Glass Define this to print a report before boot, similar to this: 24153a608ca0SSimon Glass 24163a608ca0SSimon Glass Timer summary in microseconds: 24173a608ca0SSimon Glass Mark Elapsed Stage 24183a608ca0SSimon Glass 0 0 reset 24193a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 24203a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 24213a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 24223a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 24233a608ca0SSimon Glass 3,910,375 250,777 main_loop 24243a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 24253a608ca0SSimon Glass 30,361,327 445,160 start_kernel 24263a608ca0SSimon Glass 24272eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 24282eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 24292eba38cfSSimon Glass and un/stashing of bootstage data. 24302eba38cfSSimon Glass 243194fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 243294fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 243394fd1316SSimon Glass node is created with each bootstage id as a child. Each child 243494fd1316SSimon Glass has a 'name' property and either 'mark' containing the 243594fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 243694fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 243794fd1316SSimon Glass For example: 243894fd1316SSimon Glass 243994fd1316SSimon Glass bootstage { 244094fd1316SSimon Glass 154 { 244194fd1316SSimon Glass name = "board_init_f"; 244294fd1316SSimon Glass mark = <3575678>; 244394fd1316SSimon Glass }; 244494fd1316SSimon Glass 170 { 244594fd1316SSimon Glass name = "lcd"; 244694fd1316SSimon Glass accum = <33482>; 244794fd1316SSimon Glass }; 244894fd1316SSimon Glass }; 244994fd1316SSimon Glass 245094fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 245194fd1316SSimon Glass 24521372cce2SMarian BalakowiczLegacy uImage format: 24531372cce2SMarian Balakowicz 2454c609719bSwdenk Arg Where When 2455c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2456c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2457c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2458c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2459c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2460c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2461c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2462c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2463c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 24641372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2465c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2466c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2467c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2468c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 24691372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2470c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 24711372cce2SMarian Balakowicz 24721372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 24731372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 24741372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 24751372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 24761372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 24771372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 24781372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 247911ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 24801372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 24811372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 24821372cce2SMarian Balakowicz 2483ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2484c609719bSwdenk 2485a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 248663e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 248763e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 248863e73c9aSwdenk 2489566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2490566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2491566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2492566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2493566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2494566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2495566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2496566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2497566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2498566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2499566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2500566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2501566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2502566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2503566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2504566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2505566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2506566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2507566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2508566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2509566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2510566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2511566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2512566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2513566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2514566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2515566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2516566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2517566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2518566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2519566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2520566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2521566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2522566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2523566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2524566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2525566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2526566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2527566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2528566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2529566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2530566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2531566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2532566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2533566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2534566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2535566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2536c609719bSwdenk 2537566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2538c609719bSwdenk 2539566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2540566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2541566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2542206c60cbSwdenk 2543566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2544566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 254511ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2546566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2547566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2548566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 254974de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 255074de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2551566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2552c609719bSwdenk 25531372cce2SMarian BalakowiczFIT uImage format: 25541372cce2SMarian Balakowicz 25551372cce2SMarian Balakowicz Arg Where When 25561372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 25571372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 25581372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 25591372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 25601372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 25611372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2562f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 25631372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 25641372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 25651372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 25661372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 25671372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 256811ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 256911ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 25701372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 25711372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 25721372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 25731372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 25741372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 25751372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 25761372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 25771372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 25781372cce2SMarian Balakowicz 25791372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 25801372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 25811372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 258211ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 25831372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 25841372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 25851372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 25861372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 25871372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 25881372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 25891372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 25901372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 25911372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 25921372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 25931372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 25941372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 25951372cce2SMarian Balakowicz 259611ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 25971372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 25981372cce2SMarian Balakowicz 259911ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 26001372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 26011372cce2SMarian Balakowicz 260211ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 26031372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 26041372cce2SMarian Balakowicz 26054cf2609bSWolfgang Denk- Standalone program support: 26064cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 26074cf2609bSWolfgang Denk 26086feff899SWolfgang Denk This option defines a board specific value for the 26096feff899SWolfgang Denk address where standalone program gets loaded, thus 26106feff899SWolfgang Denk overwriting the architecture dependent default 26114cf2609bSWolfgang Denk settings. 26124cf2609bSWolfgang Denk 26134cf2609bSWolfgang Denk- Frame Buffer Address: 26144cf2609bSWolfgang Denk CONFIG_FB_ADDR 26154cf2609bSWolfgang Denk 26164cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 26174cf2609bSWolfgang Denk address for frame buffer. 26184cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 26194cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 26206feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 26214cf2609bSWolfgang Denk 26224cf2609bSWolfgang Denk Please see board_init_f function. 26234cf2609bSWolfgang Denk 2624cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2625cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2626cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2627cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2628cccfc2abSDetlev Zundel 2629cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2630cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2631cccfc2abSDetlev Zundel 2632cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2633cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2634cccfc2abSDetlev Zundel 2635cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2636cccfc2abSDetlev Zundel Needed for mtdparts command support. 2637cccfc2abSDetlev Zundel 2638cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2639cccfc2abSDetlev Zundel 2640cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2641cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2642cccfc2abSDetlev Zundel 26436a11cf48SDaniel Schwierzeck- SPL framework 26446a11cf48SDaniel Schwierzeck CONFIG_SPL 26456a11cf48SDaniel Schwierzeck Enable building of SPL globally. 26466a11cf48SDaniel Schwierzeck 264795579793STom Rini CONFIG_SPL_LDSCRIPT 264895579793STom Rini LDSCRIPT for linking the SPL binary. 264995579793STom Rini 265095579793STom Rini CONFIG_SPL_MAX_SIZE 265195579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 265295579793STom Rini 26536a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 26546a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 26556a11cf48SDaniel Schwierzeck 265694a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 265794a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 265894a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 265994a45bb1SScott Wood 266095579793STom Rini CONFIG_SPL_BSS_START_ADDR 266195579793STom Rini Link address for the BSS within the SPL binary. 266295579793STom Rini 266395579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 266495579793STom Rini Maximum binary size of the BSS section of the SPL binary. 266595579793STom Rini 266695579793STom Rini CONFIG_SPL_STACK 266795579793STom Rini Adress of the start of the stack SPL will use 266895579793STom Rini 266994a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 267094a45bb1SScott Wood Adress of the start of the stack SPL will use after 267194a45bb1SScott Wood relocation. If unspecified, this is equal to 267294a45bb1SScott Wood CONFIG_SPL_STACK. 267394a45bb1SScott Wood 267495579793STom Rini CONFIG_SYS_SPL_MALLOC_START 267595579793STom Rini Starting address of the malloc pool used in SPL. 267695579793STom Rini 267795579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 267895579793STom Rini The size of the malloc pool used in SPL. 26796a11cf48SDaniel Schwierzeck 268047f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 268147f7bcaeSTom Rini Enable the SPL framework under common/. This framework 268247f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 268347f7bcaeSTom Rini NAND loading of the Linux Kernel. 268447f7bcaeSTom Rini 2685861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 2686861a86f4STom Rini For ARM, enable an optional function to print more information 2687861a86f4STom Rini about the running system. 2688861a86f4STom Rini 26894b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 26904b919725SScott Wood Arch init code should be built for a very small image 26914b919725SScott Wood 26926a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 26936a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 26946a11cf48SDaniel Schwierzeck 26956a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 26966a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 26976a11cf48SDaniel Schwierzeck 26986a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 26996a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 27006a11cf48SDaniel Schwierzeck 27016a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 27026a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 27036a11cf48SDaniel Schwierzeck 27046a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 27056a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 27066a11cf48SDaniel Schwierzeck 270795579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 270895579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 270995579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 271095579793STom Rini Address, size and partition on the MMC to load U-Boot from 271195579793STom Rini when the MMC is being used in raw mode. 271295579793STom Rini 271395579793STom Rini CONFIG_SPL_FAT_SUPPORT 271495579793STom Rini Support for fs/fat/libfat.o in SPL binary 271595579793STom Rini 271695579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 271795579793STom Rini Filename to read to load U-Boot when reading from FAT 271895579793STom Rini 2719*6f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 2720*6f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 2721*6f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 2722*6f2f01b9SScott Wood 2723*6f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 2724*6f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 2725*6f2f01b9SScott Wood 2726*6f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 2727*6f2f01b9SScott Wood Include standard software ECC in the SPL 2728*6f2f01b9SScott Wood 272995579793STom Rini CONFIG_SPL_NAND_SIMPLE 273095579793STom Rini Support for drivers/mtd/nand/libnand.o in SPL binary 273195579793STom Rini 273295579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 273395579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 273495579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 273595579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 273695579793STom Rini CONFIG_SYS_NAND_ECCBYTES 273795579793STom Rini Defines the size and behavior of the NAND that SPL uses 273895579793STom Rini to read U-Boot with CONFIG_SPL_NAND_SIMPLE 273995579793STom Rini 274095579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 274195579793STom Rini Location in NAND for CONFIG_SPL_NAND_SIMPLE to read U-Boot 274295579793STom Rini from. 274395579793STom Rini 274495579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 274595579793STom Rini Location in memory for CONFIG_SPL_NAND_SIMPLE to load U-Boot 274695579793STom Rini to. 274795579793STom Rini 274895579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 274995579793STom Rini Define this if you need to first read the OOB and then the 275095579793STom Rini data. This is used for example on davinci plattforms. 275195579793STom Rini 275295579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 275395579793STom Rini Support for an OMAP3-specific set of functions to return the 275495579793STom Rini ID and MFR of the first attached NAND chip, if present. 275595579793STom Rini 27566a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 27576a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 27586a11cf48SDaniel Schwierzeck 27596a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 27606a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 27616a11cf48SDaniel Schwierzeck 27626a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 27636a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 27646a11cf48SDaniel Schwierzeck 2765c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 2766c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 2767c57b953dSPavel Machek 27686a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 27696a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 27701372cce2SMarian Balakowicz 2771ca2fca22SScott Wood CONFIG_SPL_TARGET 2772ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 2773ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 2774ca2fca22SScott Wood example if more than one image needs to be produced. 2775ca2fca22SScott Wood 2776c609719bSwdenkModem Support: 2777c609719bSwdenk-------------- 2778c609719bSwdenk 2779566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2780c609719bSwdenk 278111ccc33fSMarcel Ziswiler- Modem support enable: 2782c609719bSwdenk CONFIG_MODEM_SUPPORT 2783c609719bSwdenk 2784c609719bSwdenk- RTS/CTS Flow control enable: 2785c609719bSwdenk CONFIG_HWFLOW 2786c609719bSwdenk 2787c609719bSwdenk- Modem debug support: 2788c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2789c609719bSwdenk 2790c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2791c609719bSwdenk for modem support. Useful only with BDI2000. 2792c609719bSwdenk 2793a8c7c708Swdenk- Interrupt support (PPC): 2794a8c7c708Swdenk 2795a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2796a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 279711ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2798a8c7c708Swdenk should set decrementer_count to appropriate value. If 279911ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2800a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 280111ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2802a8c7c708Swdenk specific handling. If board has watchdog / status_led 2803a8c7c708Swdenk / other_activity_monitor it works automatically from 2804a8c7c708Swdenk general timer_interrupt(). 2805a8c7c708Swdenk 2806c609719bSwdenk- General: 2807c609719bSwdenk 2808c609719bSwdenk In the target system modem support is enabled when a 2809c609719bSwdenk specific key (key combination) is pressed during 2810c609719bSwdenk power-on. Otherwise U-Boot will boot normally 281111ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2812c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2813c609719bSwdenk function, returning 1 and thus enabling modem 2814c609719bSwdenk initialization. 2815c609719bSwdenk 2816c609719bSwdenk If there are no modem init strings in the 2817c609719bSwdenk environment, U-Boot proceed to autoboot; the 2818c609719bSwdenk previous output (banner, info printfs) will be 281911ccc33fSMarcel Ziswiler suppressed, though. 2820c609719bSwdenk 2821c609719bSwdenk See also: doc/README.Modem 2822c609719bSwdenk 28239660e442SHelmut RaigerBoard initialization settings: 28249660e442SHelmut Raiger------------------------------ 28259660e442SHelmut Raiger 28269660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 28279660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 28289660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 28299660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 28309660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 28319660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 28329660e442SHelmut Raiger 28339660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 28349660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 28359660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 28369660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2837c609719bSwdenk 2838c609719bSwdenkConfiguration Settings: 2839c609719bSwdenk----------------------- 2840c609719bSwdenk 28416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2842c609719bSwdenk undefine this when you're short of memory. 2843c609719bSwdenk 28442fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 28452fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 28462fb2604dSPeter Tyser 28476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2848c609719bSwdenk prompt for user input. 2849c609719bSwdenk 28506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2851c609719bSwdenk 28526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2853c609719bSwdenk 28546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2855c609719bSwdenk 28566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2857c609719bSwdenk the application (usually a Linux kernel) when it is 2858c609719bSwdenk booted 2859c609719bSwdenk 28606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2861c609719bSwdenk List of legal baudrate settings for this board. 2862c609719bSwdenk 28636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2864c609719bSwdenk Suppress display of console information at boot. 2865c609719bSwdenk 28666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2867c609719bSwdenk If the board specific function 2868c609719bSwdenk extern int overwrite_console (void); 2869c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2870c609719bSwdenk serial port, else the settings in the environment are used. 2871c609719bSwdenk 28726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2873c609719bSwdenk Enable the call to overwrite_console(). 2874c609719bSwdenk 28756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2876c609719bSwdenk Enable overwrite of previous console environment settings. 2877c609719bSwdenk 28786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2879c609719bSwdenk Begin and End addresses of the area used by the 2880c609719bSwdenk simple memory test. 2881c609719bSwdenk 28826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2883c609719bSwdenk Enable an alternate, more extensive memory test. 2884c609719bSwdenk 28856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 28865f535fe1Swdenk Scratch address used by the alternate memory test 28875f535fe1Swdenk You only need to set this if address zero isn't writeable 28885f535fe1Swdenk 28896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 28906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 289114f73ca6SStefan Roese this specified memory area will get subtracted from the top 289211ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 289314f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 289414f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 289514f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 28965e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 289714f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 28985e12e75dSStefan Roese will have to get fixed in Linux additionally. 289914f73ca6SStefan Roese 290014f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 290114f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 290214f73ca6SStefan Roese be touched. 290314f73ca6SStefan Roese 290414f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 290514f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 290614f73ca6SStefan Roese then the end address of the Linux memory will be located at a 290714f73ca6SStefan Roese non page size aligned address and this could cause major 290814f73ca6SStefan Roese problems. 290914f73ca6SStefan Roese 29106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2911c609719bSwdenk Default load address for network file downloads 2912c609719bSwdenk 29136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2914c609719bSwdenk Enable temporary baudrate change while serial download 2915c609719bSwdenk 29166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2917c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2918c609719bSwdenk 29196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2920c609719bSwdenk Physical start address of Motherboard I/O (if using a 2921c609719bSwdenk Cogent motherboard) 2922c609719bSwdenk 29236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2924c609719bSwdenk Physical start address of Flash memory. 2925c609719bSwdenk 29266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2927c609719bSwdenk Physical start address of boot monitor code (set by 2928c609719bSwdenk make config files to be same as the text base address 292914d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 29306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2931c609719bSwdenk 29326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 29333b57fe0aSwdenk Size of memory reserved for monitor code, used to 29343b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 29353b57fe0aSwdenk embedded within the U-Boot image, or in a separate 29363b57fe0aSwdenk flash sector. 2937c609719bSwdenk 29386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2939c609719bSwdenk Size of DRAM reserved for malloc() use. 2940c609719bSwdenk 29416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 294215940c9aSStefan Roese Normally compressed uImages are limited to an 294315940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 29446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 294515940c9aSStefan Roese to adjust this setting to your needs. 2946c609719bSwdenk 29476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2948c609719bSwdenk Maximum size of memory mapped by the startup code of 2949c609719bSwdenk the Linux kernel; all data that must be processed by 29507d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 29517d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 29527d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 29537d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2954c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2955c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2956c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2957c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2958c609719bSwdenk 2959fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2960fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2961fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2962fca43cc8SJohn Rigby is enabled. 2963fca43cc8SJohn Rigby 2964fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2965fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2966fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2967fca43cc8SJohn Rigby 2968fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2969fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2970fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2971fca43cc8SJohn Rigby 29726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2973c609719bSwdenk Max number of Flash memory banks 2974c609719bSwdenk 29756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2976c609719bSwdenk Max number of sectors on a Flash chip 2977c609719bSwdenk 29786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2979c609719bSwdenk Timeout for Flash erase operations (in ms) 2980c609719bSwdenk 29816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2982c609719bSwdenk Timeout for Flash write operations (in ms) 2983c609719bSwdenk 29846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 29858564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 29868564acf9Swdenk 29876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 29888564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 29898564acf9Swdenk 29906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 29918564acf9Swdenk If defined, hardware flash sectors protection is used 29928564acf9Swdenk instead of U-Boot software protection. 29938564acf9Swdenk 29946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2995c609719bSwdenk 2996c609719bSwdenk Enable TFTP transfers directly to flash memory; 2997c609719bSwdenk without this option such a download has to be 2998c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2999c609719bSwdenk copy from RAM to flash. 3000c609719bSwdenk 3001c609719bSwdenk The two-step approach is usually more reliable, since 3002c609719bSwdenk you can check if the download worked before you erase 300311ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 300411ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3005c609719bSwdenk downloaded image) this option may be very useful. 3006c609719bSwdenk 30076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3008c609719bSwdenk Define if the flash driver uses extra elements in the 30095653fc33Swdenk common flash structure for storing flash geometry. 30105653fc33Swdenk 301100b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 30125653fc33Swdenk This option also enables the building of the cfi_flash driver 30135653fc33Swdenk in the drivers directory 301453cf9435Sstroese 301591809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 301691809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 301791809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 301891809ed5SPiotr Ziecik to the MTD layer. 301991809ed5SPiotr Ziecik 30206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 302196ef831fSGuennadi Liakhovetski Use buffered writes to flash. 302296ef831fSGuennadi Liakhovetski 302396ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 302496ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 302596ef831fSGuennadi Liakhovetski write commands. 302696ef831fSGuennadi Liakhovetski 30276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 30285568e613SStefan Roese If this option is defined, the common CFI flash doesn't 30295568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 30305568e613SStefan Roese is useful, if some of the configured banks are only 30315568e613SStefan Roese optionally available. 30325568e613SStefan Roese 30339a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 30349a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 30359a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 30369a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 30379a042e9cSJerry Van Baren 30386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 303911ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 304011ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 304153cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 304253cf9435Sstroese buffers can be full shortly after enabling the interface 304311ccc33fSMarcel Ziswiler on high Ethernet traffic. 304453cf9435Sstroese Defaults to 4 if not defined. 3045c609719bSwdenk 3046ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3047ea882bafSWolfgang Denk 3048ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3049ea882bafSWolfgang Denk internally to store the environment settings. The default 3050ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3051ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3052ea882bafSWolfgang Denk lib/hashtable.c for details. 3053ea882bafSWolfgang Denk 3054c609719bSwdenkThe following definitions that deal with the placement and management 3055c609719bSwdenkof environment data (variable area); in general, we support the 3056c609719bSwdenkfollowing configurations: 3057c609719bSwdenk 3058c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3059c3eb3fe4SMike Frysinger 3060c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3061c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3062c3eb3fe4SMike Frysinger 30635a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3064c609719bSwdenk 3065c609719bSwdenk Define this if the environment is in flash memory. 3066c609719bSwdenk 3067c609719bSwdenk a) The environment occupies one whole flash sector, which is 3068c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3069c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3070c609719bSwdenk sector" type flash chips, which have several smaller 3071c609719bSwdenk sectors at the start or the end. For instance, such a 3072c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3073c609719bSwdenk such a case you would place the environment in one of the 3074c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3075c609719bSwdenk "top boot sector" type flash chips, you would put the 3076c609719bSwdenk environment in one of the last sectors, leaving a gap 3077c609719bSwdenk between U-Boot and the environment. 3078c609719bSwdenk 30790e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3080c609719bSwdenk 3081c609719bSwdenk Offset of environment data (variable area) to the 3082c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3083c609719bSwdenk type flash chips the second sector can be used: the offset 3084c609719bSwdenk for this sector is given here. 3085c609719bSwdenk 30866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3087c609719bSwdenk 30880e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3089c609719bSwdenk 3090c609719bSwdenk This is just another way to specify the start address of 3091c609719bSwdenk the flash sector containing the environment (instead of 30920e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3093c609719bSwdenk 30940e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3095c609719bSwdenk 3096c609719bSwdenk Size of the sector containing the environment. 3097c609719bSwdenk 3098c609719bSwdenk 3099c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3100c609719bSwdenk In such a case you don't want to spend a whole sector for 3101c609719bSwdenk the environment. 3102c609719bSwdenk 31030e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3104c609719bSwdenk 31055a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 31060e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3107c609719bSwdenk of this flash sector for the environment. This saves 3108c609719bSwdenk memory for the RAM copy of the environment. 3109c609719bSwdenk 3110c609719bSwdenk It may also save flash memory if you decide to use this 3111c609719bSwdenk when your environment is "embedded" within U-Boot code, 3112c609719bSwdenk since then the remainder of the flash sector could be used 3113c609719bSwdenk for U-Boot code. It should be pointed out that this is 3114c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3115c609719bSwdenk updating the environment in flash makes it always 3116c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3117c609719bSwdenk wrong before the contents has been restored from a copy in 3118c609719bSwdenk RAM, your target system will be dead. 3119c609719bSwdenk 31200e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 31210e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3122c609719bSwdenk 3123c609719bSwdenk These settings describe a second storage area used to hold 312411ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 31253e38691eSwdenk a valid backup copy in case there is a power failure during 3126c609719bSwdenk a "saveenv" operation. 3127c609719bSwdenk 3128c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3129c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3130c609719bSwdenkaccordingly! 3131c609719bSwdenk 3132c609719bSwdenk 31339314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3134c609719bSwdenk 3135c609719bSwdenk Define this if you have some non-volatile memory device 3136c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3137c609719bSwdenk environment. 3138c609719bSwdenk 31390e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 31400e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3141c609719bSwdenk 314211ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3143c609719bSwdenk want to use for environment. It is assumed that this memory 3144c609719bSwdenk can just be read and written to, without any special 3145c609719bSwdenk provision. 3146c609719bSwdenk 3147c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3148c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 314911ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3150c609719bSwdenkU-Boot will hang. 3151c609719bSwdenk 3152c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3153c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3154c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3155c609719bSwdenkto save the current settings. 3156c609719bSwdenk 3157c609719bSwdenk 3158bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3159c609719bSwdenk 3160c609719bSwdenk Use this if you have an EEPROM or similar serial access 3161c609719bSwdenk device and a driver for it. 3162c609719bSwdenk 31630e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 31640e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3165c609719bSwdenk 3166c609719bSwdenk These two #defines specify the offset and size of the 3167c609719bSwdenk environment area within the total memory of your EEPROM. 3168c609719bSwdenk 31696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3170c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3171c609719bSwdenk The default address is zero. 3172c609719bSwdenk 31736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3174c609719bSwdenk If defined, the number of bits used to address bytes in a 3175c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3176c609719bSwdenk would require six bits. 3177c609719bSwdenk 31786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3179c609719bSwdenk If defined, the number of milliseconds to delay between 3180c609719bSwdenk page writes. The default is zero milliseconds. 3181c609719bSwdenk 31826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3183c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3184c609719bSwdenk that this is NOT the chip address length! 3185c609719bSwdenk 31866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 31875cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 31885cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 31895cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 31905cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 31915cf91d6bSwdenk byte chips. 31925cf91d6bSwdenk 31935cf91d6bSwdenk Note that we consider the length of the address field to 31945cf91d6bSwdenk still be one byte because the extra address bits are hidden 31955cf91d6bSwdenk in the chip address. 31965cf91d6bSwdenk 31976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3198c609719bSwdenk The size in bytes of the EEPROM device. 3199c609719bSwdenk 3200548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3201548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3202548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3203548738b4SHeiko Schocher 3204548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3205548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3206548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3207548738b4SHeiko Schocher EEPROM. For example: 3208548738b4SHeiko Schocher 3209548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3210548738b4SHeiko Schocher 3211548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3212548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3213c609719bSwdenk 3214057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 32155779d8d9Swdenk 32165779d8d9Swdenk Define this if you have a DataFlash memory device which you 32175779d8d9Swdenk want to use for the environment. 32185779d8d9Swdenk 32190e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 32200e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 32210e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 32225779d8d9Swdenk 32235779d8d9Swdenk These three #defines specify the offset and size of the 32245779d8d9Swdenk environment area within the total memory of your DataFlash placed 32255779d8d9Swdenk at the specified address. 32265779d8d9Swdenk 32270a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 32280a85a9e7SLiu Gang 32290a85a9e7SLiu Gang Define this if you have a remote memory space which you 32300a85a9e7SLiu Gang want to use for the local device's environment. 32310a85a9e7SLiu Gang 32320a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 32330a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 32340a85a9e7SLiu Gang 32350a85a9e7SLiu Gang These two #defines specify the address and size of the 32360a85a9e7SLiu Gang environment area within the remote memory space. The 32370a85a9e7SLiu Gang local device can get the environment from remote memory 3238fc54c7faSLiu Gang space by SRIO or PCIE links. 32390a85a9e7SLiu Gang 32400a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 32410a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3242fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3243fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 32440a85a9e7SLiu Gang 324551bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 324613a5695bSwdenk 324713a5695bSwdenk Define this if you have a NAND device which you want to use 324813a5695bSwdenk for the environment. 324913a5695bSwdenk 32500e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 32510e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 325213a5695bSwdenk 325313a5695bSwdenk These two #defines specify the offset and size of the environment 3254fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3255fdd813deSScott Wood aligned to an erase block boundary. 32565779d8d9Swdenk 3257fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3258e443c944SMarkus Klotzbuecher 32590e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3260fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3261fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3262fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3263fdd813deSScott Wood aligned to an erase block boundary. 3264e443c944SMarkus Klotzbuecher 3265fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3266fdd813deSScott Wood 3267fdd813deSScott Wood Specifies the length of the region in which the environment 3268fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3269fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3270fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3271fdd813deSScott Wood the range to be avoided. 3272fdd813deSScott Wood 3273fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3274fdd813deSScott Wood 3275fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3276fdd813deSScott Wood environment from block zero's out-of-band data. The 3277fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3278fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3279fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3280e443c944SMarkus Klotzbuecher 3281b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3282b74ab737SGuennadi Liakhovetski 3283b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3284b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3285b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3286b74ab737SGuennadi Liakhovetski 32876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3288c609719bSwdenk 3289c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3290c609719bSwdenk area is used at an early stage (ROM part) if the environment 3291c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3292c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3293c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3294c609719bSwdenk to be a good choice since it makes it far enough from the 3295c609719bSwdenk start of the data area as well as from the stack pointer. 3296c609719bSwdenk 3297e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3298c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3299cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3300c609719bSwdenkuntil then to read environment variables. 3301c609719bSwdenk 330285ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 330385ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 330485ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 330585ec0bccSwdenknecessary, because the first environment variable we need is the 330685ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 330785ec0bccSwdenkhave any device yet where we could complain.] 3308c609719bSwdenk 3309c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3310c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 331185ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3312c609719bSwdenk 33136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3314fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3315fc3e2165Swdenk 33166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3317fc3e2165Swdenk also needs to be defined. 3318fc3e2165Swdenk 33196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3320fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3321c609719bSwdenk 3322f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3323f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3324f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3325f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3326f5675aa5SRon Madrid space for already greatly restricted images, including but not 3327f5675aa5SRon Madrid limited to NAND_SPL configurations. 3328f5675aa5SRon Madrid 3329c609719bSwdenkLow Level (hardware related) configuration options: 3330dc7c9a1aSwdenk--------------------------------------------------- 3331c609719bSwdenk 33326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3333c609719bSwdenk Cache Line Size of the CPU. 3334c609719bSwdenk 33356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3336c609719bSwdenk Default address of the IMMR after system reset. 33372535d602Swdenk 33382535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 33392535d602Swdenk and RPXsuper) to be able to adjust the position of 33402535d602Swdenk the IMMR register after a reset. 3341c609719bSwdenk 3342e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3343e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3344e46fedfeSTimur Tabi PowerPC SOCs. 3345e46fedfeSTimur Tabi 3346e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3347e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3348e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3349e46fedfeSTimur Tabi 3350e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3351e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3352e46fedfeSTimur Tabi 3353e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3354e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3355e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3356e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3357e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3358e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3359e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3360e46fedfeSTimur Tabi 3361e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3362e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3363e46fedfeSTimur Tabi 3364e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3365e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3366e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3367e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3368e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3369e46fedfeSTimur Tabi 3370e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3371e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3372e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3373e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3374e46fedfeSTimur Tabi 3375e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3376e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3377e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3378e46fedfeSTimur Tabi 33797f6c2cbcSwdenk- Floppy Disk Support: 33806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 33817f6c2cbcSwdenk 33827f6c2cbcSwdenk the default drive number (default value 0) 33837f6c2cbcSwdenk 33846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 33857f6c2cbcSwdenk 338611ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 33877f6c2cbcSwdenk (default value 1) 33887f6c2cbcSwdenk 33896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 33907f6c2cbcSwdenk 33917f6c2cbcSwdenk defines the offset of register from address. It 33927f6c2cbcSwdenk depends on which part of the data bus is connected to 339311ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 33947f6c2cbcSwdenk 33956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 33966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 33977f6c2cbcSwdenk default value. 33987f6c2cbcSwdenk 33996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 34007f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 34017f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 34027f6c2cbcSwdenk source code. It is used to make hardware dependant 34037f6c2cbcSwdenk initializations. 34047f6c2cbcSwdenk 34050abddf82SMacpaul Lin- CONFIG_IDE_AHB: 34060abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 34070abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 34080abddf82SMacpaul Lin When software is doing ATA command and data transfer to 34090abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 34100abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 34110abddf82SMacpaul Lin is requierd. 34120abddf82SMacpaul Lin 34136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 341425d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 341525d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3416c609719bSwdenk 34176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3418c609719bSwdenk 34197152b1d0Swdenk Start address of memory area that can be used for 3420c609719bSwdenk initial data and stack; please note that this must be 3421c609719bSwdenk writable memory that is working WITHOUT special 3422c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3423c609719bSwdenk will become available only after programming the 3424c609719bSwdenk memory controller and running certain initialization 3425c609719bSwdenk sequences. 3426c609719bSwdenk 3427c609719bSwdenk U-Boot uses the following memory types: 3428c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3429c609719bSwdenk - MPC824X: data cache 3430c609719bSwdenk - PPC4xx: data cache 3431c609719bSwdenk 34326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3433c609719bSwdenk 3434c609719bSwdenk Offset of the initial data structure in the memory 34356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 34366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3437c609719bSwdenk data is located at the end of the available space 3438553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 34396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 34406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 34416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3442c609719bSwdenk 3443c609719bSwdenk Note: 3444c609719bSwdenk On the MPC824X (or other systems that use the data 3445c609719bSwdenk cache for initial memory) the address chosen for 34466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3447c609719bSwdenk point to an otherwise UNUSED address space between 3448c609719bSwdenk the top of RAM and the start of the PCI space. 3449c609719bSwdenk 34506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3451c609719bSwdenk 34526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3453c609719bSwdenk 34546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3455c609719bSwdenk 34566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3457c609719bSwdenk 34586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3459c609719bSwdenk 34606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3461c609719bSwdenk 34626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3463c609719bSwdenk SDRAM timing 3464c609719bSwdenk 34656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3466c609719bSwdenk periodic timer for refresh 3467c609719bSwdenk 34686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3469c609719bSwdenk 34706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 34716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 34726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 34736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3474c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3475c609719bSwdenk 3476c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 34776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 34786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3479c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3480c609719bSwdenk 34816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 34826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3483c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3484c609719bSwdenk Prescaler definitions (SDRAM timing) 3485c609719bSwdenk 34866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3487c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3488c609719bSwdenk define relocation offset in DPRAM [DSP2] 3489c609719bSwdenk 34906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3491b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3492b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3493b423d055SHeiko Schocher 34946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3495c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3496c609719bSwdenk define relocation offset in DPRAM [SCC4] 3497c609719bSwdenk 34986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3499c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3500c609719bSwdenk wrong setting might damage your board. Read 3501c609719bSwdenk doc/README.MBX before setting this variable! 3502c609719bSwdenk 35036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3504ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3505ea909b76Swdenk (Power On Self Tests). This definition overrides 3506ea909b76Swdenk #define'd default value in commproc.h resp. 3507ea909b76Swdenk cpm_8260.h. 3508ea909b76Swdenk 35096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 35106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 35116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 35126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 35136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 35146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 35156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 35166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3517a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 35185d232d0eSwdenk 35199cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 35209cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 35219cacf4fcSDirk Eibach required. 35229cacf4fcSDirk Eibach 352369fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 352469fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 352569fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 352669fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 352769fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 352869fd2d3bSAndrew Sharp by coreboot or similar. 352969fd2d3bSAndrew Sharp 3530a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3531a09b9b68SKumar Gala Chip has SRIO or not 3532a09b9b68SKumar Gala 3533a09b9b68SKumar Gala- CONFIG_SRIO1: 3534a09b9b68SKumar Gala Board has SRIO 1 port available 3535a09b9b68SKumar Gala 3536a09b9b68SKumar Gala- CONFIG_SRIO2: 3537a09b9b68SKumar Gala Board has SRIO 2 port available 3538a09b9b68SKumar Gala 3539a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3540a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3541a09b9b68SKumar Gala 3542a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3543a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3544a09b9b68SKumar Gala 3545a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3546a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3547a09b9b68SKumar Gala 3548eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3549eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3550eced4626SAlex Waterman 16 bit bus. 3551eced4626SAlex Waterman 3552eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3553eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3554eced4626SAlex Waterman a default value will be used. 3555eced4626SAlex Waterman 3556bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3557218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3558218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3559218ca724SWolfgang Denk 3560bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3561bb99ad6dSBen Warren I2C address of the SPD EEPROM 3562bb99ad6dSBen Warren 35636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3564218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3565218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3566218ca724SWolfgang Denk to something your driver can deal with. 3567bb99ad6dSBen Warren 35681b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 35691b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 35701b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 35711b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 35721b3e3c4fSYork Sun header files or board specific files. 35731b3e3c4fSYork Sun 35746f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 35756f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 35766f5e1dc5SYork Sun 35776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3578218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3579218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 35802ad6b513STimur Tabi 3581c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3582c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3583c26e454dSwdenk 3584c26e454dSwdenk- CONFIG_FEC[12]_PHY 3585c26e454dSwdenk Define to the hardcoded PHY address which corresponds 35866e592385Swdenk to the given FEC; i. e. 3587c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3588c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3589c26e454dSwdenk 3590c26e454dSwdenk When set to -1, means to probe for first available. 3591c26e454dSwdenk 3592c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3593c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3594c26e454dSwdenk (so program the FEC to ignore it). 3595c26e454dSwdenk 3596c26e454dSwdenk- CONFIG_RMII 3597c26e454dSwdenk Enable RMII mode for all FECs. 3598c26e454dSwdenk Note that this is a global option, we can't 3599c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3600c26e454dSwdenk 36015cf91d6bSwdenk- CONFIG_CRC32_VERIFY 36025cf91d6bSwdenk Add a verify option to the crc32 command. 36035cf91d6bSwdenk The syntax is: 36045cf91d6bSwdenk 36055cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 36065cf91d6bSwdenk 36075cf91d6bSwdenk Where address/count indicate a memory area 36085cf91d6bSwdenk and crc32 is the correct crc32 which the 36095cf91d6bSwdenk area should have. 36105cf91d6bSwdenk 361156523f12Swdenk- CONFIG_LOOPW 361256523f12Swdenk Add the "loopw" memory command. This only takes effect if 3613602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 361456523f12Swdenk 36157b466641Sstroese- CONFIG_MX_CYCLIC 36167b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 36177b466641Sstroese "md/mw" commands. 36187b466641Sstroese Examples: 36197b466641Sstroese 36207b466641Sstroese => mdc.b 10 4 500 36217b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 36227b466641Sstroese 36237b466641Sstroese => mwc.l 100 12345678 10 36247b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 36257b466641Sstroese 36267b466641Sstroese This only takes effect if the memory commands are activated 3627602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 36287b466641Sstroese 36298aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3630afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3631e03f3169SWolfgang Denk low level initializations (like setting up the memory 3632e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3633e03f3169SWolfgang Denk relocate itself into RAM. 36348aa1a2d1Swdenk 3635e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3636e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3637e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3638e03f3169SWolfgang Denk these initializations itself. 36398aa1a2d1Swdenk 3640401bb30bSAneesh V- CONFIG_SPL_BUILD 3641df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3642df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3643df81238bSMagnus Lilja compiling a NAND SPL. 3644400558b5Swdenk 3645d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3646d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3647d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3648d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3649d8834a13SMatthias Weisser conditions but may increase the binary size. 3650d8834a13SMatthias Weisser 3651f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3652f2717b47STimur Tabi----------------------------------- 3653f2717b47STimur Tabi 3654f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3655f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3656f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3657f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3658f2717b47STimur Tabiwithin that device. 3659f2717b47STimur Tabi 3660f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3661f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3662f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3663f2717b47STimur Tabi is also specified. 3664f2717b47STimur Tabi 3665f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3666f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3667f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3668f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3669f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3670f2717b47STimur Tabi 3671f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3672f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3673f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3674f2717b47STimur Tabi virtual address in NOR flash. 3675f2717b47STimur Tabi 3676f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3677f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3678f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3679f2717b47STimur Tabi 3680f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3681f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3682f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3683f2717b47STimur Tabi 3684f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3685f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3686f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3687f2717b47STimur Tabi 3688292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3689292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3690292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3691fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3692fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3693fc54c7faSLiu Gang master's memory space. 3694f2717b47STimur Tabi 3695c609719bSwdenkBuilding the Software: 3696c609719bSwdenk====================== 3697c609719bSwdenk 3698218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3699218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3700218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3701218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3702218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3703218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3704c609719bSwdenk 3705218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3706218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3707218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3708218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3709218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3710c609719bSwdenk 3711218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3712218ca724SWolfgang Denk $ export CROSS_COMPILE 3713c609719bSwdenk 37142f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 37152f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 37162f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 37172f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 37182f8d396bSPeter Tyser 37192f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 37202f8d396bSPeter Tyser 37212f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 37222f8d396bSPeter Tyser be executed on computers running Windows. 37232f8d396bSPeter Tyser 3724c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3725c609719bSwdenksources you must configure U-Boot for one specific board type. This 3726c609719bSwdenkis done by typing: 3727c609719bSwdenk 3728c609719bSwdenk make NAME_config 3729c609719bSwdenk 3730218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 37314d675ae6SMichael Jonesrations; see boards.cfg for supported names. 373254387ac9Swdenk 3733c609719bSwdenkNote: for some board special configuration names may exist; check if 3734c609719bSwdenk additional information is available from the board vendor; for 37352729af9dSwdenk instance, the TQM823L systems are available without (standard) 37362729af9dSwdenk or with LCD support. You can select such additional "features" 373711ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3738c609719bSwdenk 37392729af9dSwdenk make TQM823L_config 37402729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3741c609719bSwdenk 3742c609719bSwdenk make TQM823L_LCD_config 3743c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3744c609719bSwdenk 3745c609719bSwdenk etc. 3746c609719bSwdenk 3747c609719bSwdenk 3748c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 37497152b1d0Swdenkimages ready for download to / installation on your system: 3750c609719bSwdenk 3751c609719bSwdenk- "u-boot.bin" is a raw binary image 3752c609719bSwdenk- "u-boot" is an image in ELF binary format 3753c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3754c609719bSwdenk 3755baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3756baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3757baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3758baf31249SMarian Balakowicz 3759baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3760baf31249SMarian Balakowicz 3761baf31249SMarian Balakowicz make O=/tmp/build distclean 3762baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3763baf31249SMarian Balakowicz make O=/tmp/build all 3764baf31249SMarian Balakowicz 3765baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3766baf31249SMarian Balakowicz 3767baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3768baf31249SMarian Balakowicz make distclean 3769baf31249SMarian Balakowicz make NAME_config 3770baf31249SMarian Balakowicz make all 3771baf31249SMarian Balakowicz 3772baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3773baf31249SMarian Balakowiczvariable. 3774baf31249SMarian Balakowicz 3775c609719bSwdenk 3776c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3777c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3778c609719bSwdenknative "make". 3779c609719bSwdenk 3780c609719bSwdenk 3781c609719bSwdenkIf the system board that you have is not listed, then you will need 3782c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3783c609719bSwdenksteps: 3784c609719bSwdenk 3785c609719bSwdenk1. Add a new configuration option for your board to the toplevel 37864d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 37874d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3788c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 378985ec0bccSwdenk files you need. In your board directory, you will need at least 379085ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 379185ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 379285ec0bccSwdenk your board 3793c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3794c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 379585ec0bccSwdenk4. Run "make <board>_config" with your new name. 3796c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3797c609719bSwdenk to be installed on your target system. 379885ec0bccSwdenk6. Debug and solve any problems that might arise. 3799c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3800c609719bSwdenk 3801c609719bSwdenk 3802c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3803c609719bSwdenk============================================================== 3804c609719bSwdenk 3805c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3806c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3807c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3808c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3809218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3810c609719bSwdenk 3811c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3812c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3813c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3814c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3815c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 38167152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3817218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3818218ca724SWolfgang Denkyou can type 3819c609719bSwdenk 3820c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3821c609719bSwdenk 3822c609719bSwdenkor to build on a native PowerPC system you can type 3823c609719bSwdenk 3824c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3825c609719bSwdenk 3826218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3827218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3828218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3829218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3830218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3831218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3832218ca724SWolfgang Denkvariable. For example: 3833baf31249SMarian Balakowicz 3834baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3835baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3836baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3837baf31249SMarian Balakowicz 3838218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3839218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3840218ca724SWolfgang Denkduring the whole build process. 3841baf31249SMarian Balakowicz 3842baf31249SMarian Balakowicz 3843c609719bSwdenkSee also "U-Boot Porting Guide" below. 3844c609719bSwdenk 3845c609719bSwdenk 3846c609719bSwdenkMonitor Commands - Overview: 3847c609719bSwdenk============================ 3848c609719bSwdenk 3849c609719bSwdenkgo - start application at address 'addr' 3850c609719bSwdenkrun - run commands in an environment variable 3851c609719bSwdenkbootm - boot application image from memory 3852c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 385344f074c7SMarek Vasutbootz - boot zImage from memory 3854c609719bSwdenktftpboot- boot image via network using TFTP protocol 3855c609719bSwdenk and env variables "ipaddr" and "serverip" 3856c609719bSwdenk (and eventually "gatewayip") 38571fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3858c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3859c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3860c609719bSwdenkloads - load S-Record file over serial line 3861c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3862c609719bSwdenkmd - memory display 3863c609719bSwdenkmm - memory modify (auto-incrementing) 3864c609719bSwdenknm - memory modify (constant address) 3865c609719bSwdenkmw - memory write (fill) 3866c609719bSwdenkcp - memory copy 3867c609719bSwdenkcmp - memory compare 3868c609719bSwdenkcrc32 - checksum calculation 38690f89c54bSPeter Tyseri2c - I2C sub-system 3870c609719bSwdenksspi - SPI utility commands 3871c609719bSwdenkbase - print or set address offset 3872c609719bSwdenkprintenv- print environment variables 3873c609719bSwdenksetenv - set environment variables 3874c609719bSwdenksaveenv - save environment variables to persistent storage 3875c609719bSwdenkprotect - enable or disable FLASH write protection 3876c609719bSwdenkerase - erase FLASH memory 3877c609719bSwdenkflinfo - print FLASH memory information 3878c609719bSwdenkbdinfo - print Board Info structure 3879c609719bSwdenkiminfo - print header information for application image 3880c609719bSwdenkconinfo - print console devices and informations 3881c609719bSwdenkide - IDE sub-system 3882c609719bSwdenkloop - infinite loop on address range 388356523f12Swdenkloopw - infinite write loop on address range 3884c609719bSwdenkmtest - simple RAM test 3885c609719bSwdenkicache - enable or disable instruction cache 3886c609719bSwdenkdcache - enable or disable data cache 3887c609719bSwdenkreset - Perform RESET of the CPU 3888c609719bSwdenkecho - echo args to console 3889c609719bSwdenkversion - print monitor version 3890c609719bSwdenkhelp - print online help 3891c609719bSwdenk? - alias for 'help' 3892c609719bSwdenk 3893c609719bSwdenk 3894c609719bSwdenkMonitor Commands - Detailed Description: 3895c609719bSwdenk======================================== 3896c609719bSwdenk 3897c609719bSwdenkTODO. 3898c609719bSwdenk 3899c609719bSwdenkFor now: just type "help <command>". 3900c609719bSwdenk 3901c609719bSwdenk 3902c609719bSwdenkEnvironment Variables: 3903c609719bSwdenk====================== 3904c609719bSwdenk 3905c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3906c609719bSwdenkcan be made persistent by saving to Flash memory. 3907c609719bSwdenk 3908c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3909c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3910c609719bSwdenkwithout a value can be used to delete a variable from the 3911c609719bSwdenkenvironment. As long as you don't save the environment you are 3912c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3913c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3914c609719bSwdenk 3915c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3916c96f86eeSWolfgang Denk 3917c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3918c609719bSwdenk 3919c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3920c609719bSwdenk 3921c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3922c609719bSwdenk 3923c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3924c609719bSwdenk 3925c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3926c609719bSwdenk 3927c609719bSwdenk bootfile - Name of the image to load with TFTP 3928c609719bSwdenk 39297d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 39307d721e34SBartlomiej Sieka command can be restricted. This variable is given as 39317d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 39327d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 39337d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 39347d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3935c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3936c3624e6eSGrant Likely bootm_mapsize. 3937c3624e6eSGrant Likely 3938c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3939c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3940c3624e6eSGrant Likely defines the size of the memory region starting at base 3941c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3942c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3943c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3944c3624e6eSGrant Likely used otherwise. 39457d721e34SBartlomiej Sieka 39467d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 39477d721e34SBartlomiej Sieka command can be restricted. This variable is given as 39487d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 39497d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 39507d721e34SBartlomiej Sieka environment variable. 39517d721e34SBartlomiej Sieka 39524bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 39534bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 39544bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 39554bae9090SBartlomiej Sieka 3956c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3957c609719bSwdenk "bootp" will just load perform a lookup of the 3958c609719bSwdenk configuration from the BOOTP server, but not try to 3959c609719bSwdenk load any image using TFTP 3960c609719bSwdenk 3961c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3962c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3963c609719bSwdenk be automatically started (by internally calling 3964c609719bSwdenk "bootm") 3965c609719bSwdenk 39664a6fd34bSwdenk If set to "no", a standalone image passed to the 39674a6fd34bSwdenk "bootm" command will be copied to the load address 39684a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 39694a6fd34bSwdenk This can be used to load and uncompress arbitrary 39704a6fd34bSwdenk data. 39714a6fd34bSwdenk 3972a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3973a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3974fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3975fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3976fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3977fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3978fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3979fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3980fa34f6b2SShawn Guo access it during the boot procedure. 3981fa34f6b2SShawn Guo 3982a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3983a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3984a28afca5SDavid A. Long to work it must reside in writable memory, have 3985a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3986a28afca5SDavid A. Long add the information it needs into it, and the memory 3987a28afca5SDavid A. Long must be accessible by the kernel. 3988a28afca5SDavid A. Long 3989eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3990eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3991eea63e05SSimon Glass defined. 3992eea63e05SSimon Glass 399317ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 399417ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 399517ea1177Swdenk mode (400kHZ). This environment variable is used in 399617ea1177Swdenk initialization code. So, for changes to be effective 399717ea1177Swdenk it must be saved and board must be reset. 399817ea1177Swdenk 3999c609719bSwdenk initrd_high - restrict positioning of initrd images: 4000c609719bSwdenk If this variable is not set, initrd images will be 4001c609719bSwdenk copied to the highest possible address in RAM; this 4002c609719bSwdenk is usually what you want since it allows for 4003c609719bSwdenk maximum initrd size. If for some reason you want to 4004c609719bSwdenk make sure that the initrd image is loaded below the 40056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4006c609719bSwdenk variable to a value of "no" or "off" or "0". 4007c609719bSwdenk Alternatively, you can set it to a maximum upper 4008c609719bSwdenk address to use (U-Boot will still check that it 4009c609719bSwdenk does not overwrite the U-Boot stack and data). 4010c609719bSwdenk 4011c609719bSwdenk For instance, when you have a system with 16 MB 40127152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4013c609719bSwdenk you can do this by adding "mem=12M" to the value of 4014c609719bSwdenk the "bootargs" variable. However, now you must make 40157152b1d0Swdenk sure that the initrd image is placed in the first 4016c609719bSwdenk 12 MB as well - this can be done with 4017c609719bSwdenk 4018c609719bSwdenk setenv initrd_high 00c00000 4019c609719bSwdenk 402038b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 402138b99261Swdenk indication to U-Boot that all addresses are legal 402238b99261Swdenk for the Linux kernel, including addresses in flash 402338b99261Swdenk memory. In this case U-Boot will NOT COPY the 402438b99261Swdenk ramdisk at all. This may be useful to reduce the 402538b99261Swdenk boot time on your system, but requires that this 402638b99261Swdenk feature is supported by your Linux kernel. 402738b99261Swdenk 4028c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4029c609719bSwdenk 4030c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4031dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4032c609719bSwdenk 4033c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4034c609719bSwdenk 4035c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4036c609719bSwdenk 4037c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4038c609719bSwdenk 4039c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4040c609719bSwdenk 4041c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4042c609719bSwdenk 4043e2a53458SMike Frysinger ethprime - controls which interface is used first. 4044a3d991bdSwdenk 4045e2a53458SMike Frysinger ethact - controls which interface is currently active. 4046e2a53458SMike Frysinger For example you can do the following 4047a3d991bdSwdenk 404848690d80SHeiko Schocher => setenv ethact FEC 404948690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 405048690d80SHeiko Schocher => setenv ethact SCC 405148690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4052a3d991bdSwdenk 4053e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4054e1692577SMatthias Fuchs available network interfaces. 4055e1692577SMatthias Fuchs It just stays at the currently selected interface. 4056e1692577SMatthias Fuchs 4057a3d991bdSwdenk netretry - When set to "no" each network operation will 4058a3d991bdSwdenk either succeed or fail without retrying. 40596e592385Swdenk When set to "once" the network operation will 40606e592385Swdenk fail when all the available network interfaces 40616e592385Swdenk are tried once without success. 4062a3d991bdSwdenk Useful on scripts which control the retry operation 4063a3d991bdSwdenk themselves. 4064a3d991bdSwdenk 4065b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4066a1cf027aSJean-Christophe PLAGNIOL-VILLARD 406728cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4068ecb0ccd9SWolfgang Denk UDP source port. 4069ecb0ccd9SWolfgang Denk 407028cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 407128cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 407228cb9375SWolfgang Denk 4073c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4074c96f86eeSWolfgang Denk we use the TFTP server's default block size 4075c96f86eeSWolfgang Denk 4076c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4077c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4078c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4079c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4080c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4081c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4082c96f86eeSWolfgang Denk with unreliable TFTP servers. 4083c96f86eeSWolfgang Denk 4084a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 408511ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4086a3d991bdSwdenk VLAN tagged frames. 4087c609719bSwdenk 4088dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4089dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4090dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4091dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4092dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4093dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4094dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4095dc0b7b0eSJason Hobbs 4096dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4097dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4098dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4099dc0b7b0eSJason Hobbs 4100dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4101dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4102dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4103dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4104dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4105dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4106dc0b7b0eSJason Hobbs 4107c609719bSwdenkThe following environment variables may be used and automatically 4108c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4109c609719bSwdenkdepending the information provided by your boot server: 4110c609719bSwdenk 4111c609719bSwdenk bootfile - see above 4112c609719bSwdenk dnsip - IP address of your Domain Name Server 4113fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4114c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4115c609719bSwdenk hostname - Target hostname 4116c609719bSwdenk ipaddr - see above 4117c609719bSwdenk netmask - Subnet Mask 4118c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4119c609719bSwdenk serverip - see above 4120c609719bSwdenk 4121c609719bSwdenk 4122c609719bSwdenkThere are two special Environment Variables: 4123c609719bSwdenk 4124c609719bSwdenk serial# - contains hardware identification information such 4125c609719bSwdenk as type string and/or serial number 4126c609719bSwdenk ethaddr - Ethernet address 4127c609719bSwdenk 4128c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4129c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4130c609719bSwdenkonce they have been set once. 4131c609719bSwdenk 4132c609719bSwdenk 4133c1551ea8SstroeseFurther special Environment Variables: 4134c1551ea8Sstroese 4135c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4136c1551ea8Sstroese with the "version" command. This variable is 4137c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4138c1551ea8Sstroese 4139c1551ea8Sstroese 4140c609719bSwdenkPlease note that changes to some configuration parameters may take 4141c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4142c609719bSwdenk 4143c609719bSwdenk 4144f07771ccSwdenkCommand Line Parsing: 4145f07771ccSwdenk===================== 4146f07771ccSwdenk 4147f07771ccSwdenkThere are two different command line parsers available with U-Boot: 41487152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4149f07771ccSwdenk 4150f07771ccSwdenkOld, simple command line parser: 4151f07771ccSwdenk-------------------------------- 4152f07771ccSwdenk 4153f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4154f07771ccSwdenk- several commands on one line, separated by ';' 4155fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4156f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4157f07771ccSwdenk for example: 4158fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4159f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4160f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4161f07771ccSwdenk 4162f07771ccSwdenkHush shell: 4163f07771ccSwdenk----------- 4164f07771ccSwdenk 4165f07771ccSwdenk- similar to Bourne shell, with control structures like 4166f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4167f07771ccSwdenk until...do...done, ... 4168f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4169f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4170f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4171f07771ccSwdenk command 4172f07771ccSwdenk 4173f07771ccSwdenkGeneral rules: 4174f07771ccSwdenk-------------- 4175f07771ccSwdenk 4176f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4177f07771ccSwdenk command) contains several commands separated by semicolon, and 4178f07771ccSwdenk one of these commands fails, then the remaining commands will be 4179f07771ccSwdenk executed anyway. 4180f07771ccSwdenk 4181f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 418211ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4183f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4184f07771ccSwdenk variables are not executed. 4185f07771ccSwdenk 4186c609719bSwdenkNote for Redundant Ethernet Interfaces: 4187c609719bSwdenk======================================= 4188c609719bSwdenk 418911ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4190c609719bSwdenksuch configurations and is capable of automatic selection of a 41917152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4192c609719bSwdenk 4193c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4194c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4195c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4196c609719bSwdenk 4197c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4198c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4199c609719bSwdenkding setting in the environment; if the corresponding environment 4200c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4201c609719bSwdenk 4202c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4203c609719bSwdenk environment, the SROM's address is used. 4204c609719bSwdenk 4205c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4206c609719bSwdenk environment exists, then the value from the environment variable is 4207c609719bSwdenk used. 4208c609719bSwdenk 4209c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4210c609719bSwdenk both addresses are the same, this MAC address is used. 4211c609719bSwdenk 4212c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4213c609719bSwdenk addresses differ, the value from the environment is used and a 4214c609719bSwdenk warning is printed. 4215c609719bSwdenk 4216c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4217c609719bSwdenk is raised. 4218c609719bSwdenk 4219ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4220ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4221ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4222ecee9324SBen WarrenThe naming convention is as follows: 4223ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4224c609719bSwdenk 4225c609719bSwdenkImage Formats: 4226c609719bSwdenk============== 4227c609719bSwdenk 42283310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 42293310c549SMarian Balakowiczimages in two formats: 42303310c549SMarian Balakowicz 42313310c549SMarian BalakowiczNew uImage format (FIT) 42323310c549SMarian Balakowicz----------------------- 42333310c549SMarian Balakowicz 42343310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 42353310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 42363310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 42373310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 42383310c549SMarian Balakowicz 42393310c549SMarian Balakowicz 42403310c549SMarian BalakowiczOld uImage format 42413310c549SMarian Balakowicz----------------- 42423310c549SMarian Balakowicz 42433310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 42443310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 42453310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4246c609719bSwdenk 4247c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4248c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4249f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4250f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4251f5ed9e39SPeter Tyser INTEGRITY). 42527b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4253afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4254afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4255c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4256c609719bSwdenk* Load Address 4257c609719bSwdenk* Entry Point 4258c609719bSwdenk* Image Name 4259c609719bSwdenk* Image Timestamp 4260c609719bSwdenk 4261c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4262c609719bSwdenkand the data portions of the image are secured against corruption by 4263c609719bSwdenkCRC32 checksums. 4264c609719bSwdenk 4265c609719bSwdenk 4266c609719bSwdenkLinux Support: 4267c609719bSwdenk============== 4268c609719bSwdenk 4269c609719bSwdenkAlthough U-Boot should support any OS or standalone application 42707152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4271c609719bSwdenkU-Boot. 4272c609719bSwdenk 4273c609719bSwdenkU-Boot includes many features that so far have been part of some 4274c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4275c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4276c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 42777152b1d0Swdenkserves several purposes: 4278c609719bSwdenk 4279c609719bSwdenk- the same features can be used for other OS or standalone 4280c609719bSwdenk applications (for instance: using compressed images to reduce the 4281c609719bSwdenk Flash memory footprint) 4282c609719bSwdenk 4283c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 42847152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4285c609719bSwdenk 4286c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4287c609719bSwdenk images; of course this also means that different kernel images can 4288c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4289c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4290c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4291c609719bSwdenk software is easier now. 4292c609719bSwdenk 4293c609719bSwdenk 4294c609719bSwdenkLinux HOWTO: 4295c609719bSwdenk============ 4296c609719bSwdenk 4297c609719bSwdenkPorting Linux to U-Boot based systems: 4298c609719bSwdenk--------------------------------------- 4299c609719bSwdenk 4300c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4301c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4302c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4303c609719bSwdenkLinux :-). 4304c609719bSwdenk 4305a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4306c609719bSwdenk 4307c609719bSwdenkJust make sure your machine specific header file (for instance 4308c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 43091dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 43101dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 43116d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4312c609719bSwdenk 4313c609719bSwdenk 4314c609719bSwdenkConfiguring the Linux kernel: 4315c609719bSwdenk----------------------------- 4316c609719bSwdenk 4317c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4318c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4319c609719bSwdenk 4320c609719bSwdenk 4321c609719bSwdenkBuilding a Linux Image: 4322c609719bSwdenk----------------------- 4323c609719bSwdenk 432424ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 432524ee89b9Swdenknot used. If you use recent kernel source, a new build target 432624ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 432724ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 432824ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 432924ee89b9Swdenk100% compatible format. 4330c609719bSwdenk 4331c609719bSwdenkExample: 4332c609719bSwdenk 4333c609719bSwdenk make TQM850L_config 4334c609719bSwdenk make oldconfig 4335c609719bSwdenk make dep 433624ee89b9Swdenk make uImage 4337c609719bSwdenk 433824ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 433924ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 434024ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4341c609719bSwdenk 434224ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 434324ee89b9Swdenk 434424ee89b9Swdenk* convert the kernel into a raw binary image: 434524ee89b9Swdenk 434624ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 434724ee89b9Swdenk -R .note -R .comment \ 434824ee89b9Swdenk -S vmlinux linux.bin 434924ee89b9Swdenk 435024ee89b9Swdenk* compress the binary image: 435124ee89b9Swdenk 435224ee89b9Swdenk gzip -9 linux.bin 435324ee89b9Swdenk 435424ee89b9Swdenk* package compressed binary image for U-Boot: 435524ee89b9Swdenk 435624ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 435724ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 435824ee89b9Swdenk -d linux.bin.gz uImage 435924ee89b9Swdenk 436024ee89b9Swdenk 436124ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 436224ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 436324ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 436424ee89b9Swdenkbyte header containing information about target architecture, 436524ee89b9Swdenkoperating system, image type, compression method, entry points, time 436624ee89b9Swdenkstamp, CRC32 checksums, etc. 436724ee89b9Swdenk 436824ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 436924ee89b9Swdenkprint the header information, or to build new images. 4370c609719bSwdenk 4371c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4372c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4373c609719bSwdenkchecksum verification: 4374c609719bSwdenk 4375c609719bSwdenk tools/mkimage -l image 4376c609719bSwdenk -l ==> list image header information 4377c609719bSwdenk 4378c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4379c609719bSwdenkfrom a "data file" which is used as image payload: 4380c609719bSwdenk 4381c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4382c609719bSwdenk -n name -d data_file image 4383c609719bSwdenk -A ==> set architecture to 'arch' 4384c609719bSwdenk -O ==> set operating system to 'os' 4385c609719bSwdenk -T ==> set image type to 'type' 4386c609719bSwdenk -C ==> set compression type 'comp' 4387c609719bSwdenk -a ==> set load address to 'addr' (hex) 4388c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4389c609719bSwdenk -n ==> set image name to 'name' 4390c609719bSwdenk -d ==> use image data from 'datafile' 4391c609719bSwdenk 439269459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 439369459791Swdenkaddress (0x00000000), but the entry point address depends on the 439469459791Swdenkkernel version: 4395c609719bSwdenk 4396c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 439724ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4398c609719bSwdenk 4399c609719bSwdenkSo a typical call to build a U-Boot image would read: 4400c609719bSwdenk 440124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 440224ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4403a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 440424ee89b9Swdenk > examples/uImage.TQM850L 440524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4406c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4407c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4408c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4409c609719bSwdenk Load Address: 0x00000000 441024ee89b9Swdenk Entry Point: 0x00000000 4411c609719bSwdenk 4412c609719bSwdenkTo verify the contents of the image (or check for corruption): 4413c609719bSwdenk 441424ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 441524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4416c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4417c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4418c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4419c609719bSwdenk Load Address: 0x00000000 442024ee89b9Swdenk Entry Point: 0x00000000 4421c609719bSwdenk 4422c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4423c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4424c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4425c609719bSwdenkneed to be uncompressed: 4426c609719bSwdenk 4427a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 442824ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 442924ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4430a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 443124ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 443224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4433c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4434c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4435c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4436c609719bSwdenk Load Address: 0x00000000 443724ee89b9Swdenk Entry Point: 0x00000000 4438c609719bSwdenk 4439c609719bSwdenk 4440c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4441c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4442c609719bSwdenk 4443c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4444c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4445c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4446c609719bSwdenk Image Name: Simple Ramdisk Image 4447c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4448c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4449c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4450c609719bSwdenk Load Address: 0x00000000 4451c609719bSwdenk Entry Point: 0x00000000 4452c609719bSwdenk 4453c609719bSwdenk 4454c609719bSwdenkInstalling a Linux Image: 4455c609719bSwdenk------------------------- 4456c609719bSwdenk 4457c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4458c609719bSwdenkyou must convert the image to S-Record format: 4459c609719bSwdenk 4460c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4461c609719bSwdenk 4462c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4463c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4464c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4465c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4466c609719bSwdenkcommand. 4467c609719bSwdenk 4468c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4469c609719bSwdenkTQM8xxL is in the first Flash bank): 4470c609719bSwdenk 4471c609719bSwdenk => erase 40100000 401FFFFF 4472c609719bSwdenk 4473c609719bSwdenk .......... done 4474c609719bSwdenk Erased 8 sectors 4475c609719bSwdenk 4476c609719bSwdenk => loads 40100000 4477c609719bSwdenk ## Ready for S-Record download ... 4478c609719bSwdenk ~>examples/image.srec 4479c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4480c609719bSwdenk ... 4481c609719bSwdenk 15989 15990 15991 15992 4482c609719bSwdenk [file transfer complete] 4483c609719bSwdenk [connected] 4484c609719bSwdenk ## Start Addr = 0x00000000 4485c609719bSwdenk 4486c609719bSwdenk 4487c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4488c609719bSwdenkthis includes a checksum verification so you can be sure no data 4489c609719bSwdenkcorruption happened: 4490c609719bSwdenk 4491c609719bSwdenk => imi 40100000 4492c609719bSwdenk 4493c609719bSwdenk ## Checking Image at 40100000 ... 4494c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4495c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4496c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4497c609719bSwdenk Load Address: 00000000 4498c609719bSwdenk Entry Point: 0000000c 4499c609719bSwdenk Verifying Checksum ... OK 4500c609719bSwdenk 4501c609719bSwdenk 4502c609719bSwdenkBoot Linux: 4503c609719bSwdenk----------- 4504c609719bSwdenk 4505c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4506c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4507c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4508c609719bSwdenkparameters. You can check and modify this variable using the 4509c609719bSwdenk"printenv" and "setenv" commands: 4510c609719bSwdenk 4511c609719bSwdenk 4512c609719bSwdenk => printenv bootargs 4513c609719bSwdenk bootargs=root=/dev/ram 4514c609719bSwdenk 4515c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4516c609719bSwdenk 4517c609719bSwdenk => printenv bootargs 4518c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4519c609719bSwdenk 4520c609719bSwdenk => bootm 40020000 4521c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4522c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4523c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4524c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4525c609719bSwdenk Load Address: 00000000 4526c609719bSwdenk Entry Point: 0000000c 4527c609719bSwdenk Verifying Checksum ... OK 4528c609719bSwdenk Uncompressing Kernel Image ... OK 4529c609719bSwdenk 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 4530c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4531c609719bSwdenk time_init: decrementer frequency = 187500000/60 4532c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4533c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4534c609719bSwdenk ... 4535c609719bSwdenk 453611ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 45377152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4538c609719bSwdenkformat!) to the "bootm" command: 4539c609719bSwdenk 4540c609719bSwdenk => imi 40100000 40200000 4541c609719bSwdenk 4542c609719bSwdenk ## Checking Image at 40100000 ... 4543c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4544c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4545c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4546c609719bSwdenk Load Address: 00000000 4547c609719bSwdenk Entry Point: 0000000c 4548c609719bSwdenk Verifying Checksum ... OK 4549c609719bSwdenk 4550c609719bSwdenk ## Checking Image at 40200000 ... 4551c609719bSwdenk Image Name: Simple Ramdisk Image 4552c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4553c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4554c609719bSwdenk Load Address: 00000000 4555c609719bSwdenk Entry Point: 00000000 4556c609719bSwdenk Verifying Checksum ... OK 4557c609719bSwdenk 4558c609719bSwdenk => bootm 40100000 40200000 4559c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4560c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4561c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4562c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4563c609719bSwdenk Load Address: 00000000 4564c609719bSwdenk Entry Point: 0000000c 4565c609719bSwdenk Verifying Checksum ... OK 4566c609719bSwdenk Uncompressing Kernel Image ... OK 4567c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4568c609719bSwdenk Image Name: Simple Ramdisk Image 4569c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4570c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4571c609719bSwdenk Load Address: 00000000 4572c609719bSwdenk Entry Point: 00000000 4573c609719bSwdenk Verifying Checksum ... OK 4574c609719bSwdenk Loading Ramdisk ... OK 4575c609719bSwdenk 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 4576c609719bSwdenk Boot arguments: root=/dev/ram 4577c609719bSwdenk time_init: decrementer frequency = 187500000/60 4578c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4579c609719bSwdenk ... 4580c609719bSwdenk RAMDISK: Compressed image found at block 0 4581c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4582c609719bSwdenk 4583c609719bSwdenk bash# 4584c609719bSwdenk 45850267768eSMatthew McClintockBoot Linux and pass a flat device tree: 45860267768eSMatthew McClintock----------- 45870267768eSMatthew McClintock 45880267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 45890267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 45900267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 45910267768eSMatthew McClintockflat device tree: 45920267768eSMatthew McClintock 45930267768eSMatthew McClintock=> print oftaddr 45940267768eSMatthew McClintockoftaddr=0x300000 45950267768eSMatthew McClintock=> print oft 45960267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 45970267768eSMatthew McClintock=> tftp $oftaddr $oft 45980267768eSMatthew McClintockSpeed: 1000, full duplex 45990267768eSMatthew McClintockUsing TSEC0 device 46000267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 46010267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 46020267768eSMatthew McClintockLoad address: 0x300000 46030267768eSMatthew McClintockLoading: # 46040267768eSMatthew McClintockdone 46050267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 46060267768eSMatthew McClintock=> tftp $loadaddr $bootfile 46070267768eSMatthew McClintockSpeed: 1000, full duplex 46080267768eSMatthew McClintockUsing TSEC0 device 46090267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 46100267768eSMatthew McClintockFilename 'uImage'. 46110267768eSMatthew McClintockLoad address: 0x200000 46120267768eSMatthew McClintockLoading:############ 46130267768eSMatthew McClintockdone 46140267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 46150267768eSMatthew McClintock=> print loadaddr 46160267768eSMatthew McClintockloadaddr=200000 46170267768eSMatthew McClintock=> print oftaddr 46180267768eSMatthew McClintockoftaddr=0x300000 46190267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 46200267768eSMatthew McClintock## Booting image at 00200000 ... 46210267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 46220267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 46230267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 46240267768eSMatthew McClintock Load Address: 00000000 46250267768eSMatthew McClintock Entry Point: 00000000 46260267768eSMatthew McClintock Verifying Checksum ... OK 46270267768eSMatthew McClintock Uncompressing Kernel Image ... OK 46280267768eSMatthew McClintockBooting using flat device tree at 0x300000 46290267768eSMatthew McClintockUsing MPC85xx ADS machine description 46300267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 46310267768eSMatthew McClintock[snip] 46320267768eSMatthew McClintock 46330267768eSMatthew McClintock 46346069ff26SwdenkMore About U-Boot Image Types: 46356069ff26Swdenk------------------------------ 46366069ff26Swdenk 46376069ff26SwdenkU-Boot supports the following image types: 46386069ff26Swdenk 46396069ff26Swdenk "Standalone Programs" are directly runnable in the environment 46406069ff26Swdenk provided by U-Boot; it is expected that (if they behave 46416069ff26Swdenk well) you can continue to work in U-Boot after return from 46426069ff26Swdenk the Standalone Program. 46436069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 46446069ff26Swdenk will take over control completely. Usually these programs 46456069ff26Swdenk will install their own set of exception handlers, device 46466069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 46476069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 46486069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 46496069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 46506069ff26Swdenk being started. 46516069ff26Swdenk "Multi-File Images" contain several images, typically an OS 46526069ff26Swdenk (Linux) kernel image and one or more data images like 46536069ff26Swdenk RAMDisks. This construct is useful for instance when you want 46546069ff26Swdenk to boot over the network using BOOTP etc., where the boot 46556069ff26Swdenk server provides just a single image file, but you want to get 46566069ff26Swdenk for instance an OS kernel and a RAMDisk image. 46576069ff26Swdenk 46586069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 46596069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 46606069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 46616069ff26Swdenk Immediately after the terminating 0 follow the images, one by 46626069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 46636069ff26Swdenk a multiple of 4 bytes). 46646069ff26Swdenk 46656069ff26Swdenk "Firmware Images" are binary images containing firmware (like 46666069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 46676069ff26Swdenk flash memory. 46686069ff26Swdenk 46696069ff26Swdenk "Script files" are command sequences that will be executed by 46706069ff26Swdenk U-Boot's command interpreter; this feature is especially 46716069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 46726069ff26Swdenk as command interpreter. 46736069ff26Swdenk 467444f074c7SMarek VasutBooting the Linux zImage: 467544f074c7SMarek Vasut------------------------- 467644f074c7SMarek Vasut 467744f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 467844f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 467944f074c7SMarek Vasutas the syntax of "bootm" command. 468044f074c7SMarek Vasut 4681017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4682017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4683017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4684017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4685017e1f3fSMarek Vasut 4686c609719bSwdenk 4687c609719bSwdenkStandalone HOWTO: 4688c609719bSwdenk================= 4689c609719bSwdenk 4690c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4691c609719bSwdenkrun "standalone" applications, which can use some resources of 4692c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4693c609719bSwdenk 4694c609719bSwdenkTwo simple examples are included with the sources: 4695c609719bSwdenk 4696c609719bSwdenk"Hello World" Demo: 4697c609719bSwdenk------------------- 4698c609719bSwdenk 4699c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4700c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4701c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4702c609719bSwdenklike that: 4703c609719bSwdenk 4704c609719bSwdenk => loads 4705c609719bSwdenk ## Ready for S-Record download ... 4706c609719bSwdenk ~>examples/hello_world.srec 4707c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4708c609719bSwdenk [file transfer complete] 4709c609719bSwdenk [connected] 4710c609719bSwdenk ## Start Addr = 0x00040004 4711c609719bSwdenk 4712c609719bSwdenk => go 40004 Hello World! This is a test. 4713c609719bSwdenk ## Starting application at 0x00040004 ... 4714c609719bSwdenk Hello World 4715c609719bSwdenk argc = 7 4716c609719bSwdenk argv[0] = "40004" 4717c609719bSwdenk argv[1] = "Hello" 4718c609719bSwdenk argv[2] = "World!" 4719c609719bSwdenk argv[3] = "This" 4720c609719bSwdenk argv[4] = "is" 4721c609719bSwdenk argv[5] = "a" 4722c609719bSwdenk argv[6] = "test." 4723c609719bSwdenk argv[7] = "<NULL>" 4724c609719bSwdenk Hit any key to exit ... 4725c609719bSwdenk 4726c609719bSwdenk ## Application terminated, rc = 0x0 4727c609719bSwdenk 4728c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4729c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4730c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4731c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4732c609719bSwdenkcharacter, but this is just a demo program. The application can be 4733c609719bSwdenkcontrolled by the following keys: 4734c609719bSwdenk 4735c609719bSwdenk ? - print current values og the CPM Timer registers 4736c609719bSwdenk b - enable interrupts and start timer 4737c609719bSwdenk e - stop timer and disable interrupts 4738c609719bSwdenk q - quit application 4739c609719bSwdenk 4740c609719bSwdenk => loads 4741c609719bSwdenk ## Ready for S-Record download ... 4742c609719bSwdenk ~>examples/timer.srec 4743c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4744c609719bSwdenk [file transfer complete] 4745c609719bSwdenk [connected] 4746c609719bSwdenk ## Start Addr = 0x00040004 4747c609719bSwdenk 4748c609719bSwdenk => go 40004 4749c609719bSwdenk ## Starting application at 0x00040004 ... 4750c609719bSwdenk TIMERS=0xfff00980 4751c609719bSwdenk Using timer 1 4752c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4753c609719bSwdenk 4754c609719bSwdenkHit 'b': 4755c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4756c609719bSwdenk Enabling timer 4757c609719bSwdenkHit '?': 4758c609719bSwdenk [q, b, e, ?] ........ 4759c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4760c609719bSwdenkHit '?': 4761c609719bSwdenk [q, b, e, ?] . 4762c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4763c609719bSwdenkHit '?': 4764c609719bSwdenk [q, b, e, ?] . 4765c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4766c609719bSwdenkHit '?': 4767c609719bSwdenk [q, b, e, ?] . 4768c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4769c609719bSwdenkHit 'e': 4770c609719bSwdenk [q, b, e, ?] ...Stopping timer 4771c609719bSwdenkHit 'q': 4772c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4773c609719bSwdenk 4774c609719bSwdenk 477585ec0bccSwdenkMinicom warning: 477685ec0bccSwdenk================ 477785ec0bccSwdenk 47787152b1d0SwdenkOver time, many people have reported problems when trying to use the 477985ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 478085ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4781f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 478285ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4783e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 4784e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 4785e53515a2SKarl O. Pincfor help with kermit. 4786e53515a2SKarl O. Pinc 478785ec0bccSwdenk 478852f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 478952f52c14Swdenkconfiguration to your "File transfer protocols" section: 479052f52c14Swdenk 479152f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 479252f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 479352f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 479452f52c14Swdenk 479552f52c14Swdenk 4796c609719bSwdenkNetBSD Notes: 4797c609719bSwdenk============= 4798c609719bSwdenk 4799c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4800c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4801c609719bSwdenk 4802c609719bSwdenkBuilding requires a cross environment; it is known to work on 4803c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4804c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4805c609719bSwdenkNote that the cross-powerpc package does not install include files; 4806c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4807c609719bSwdenkmissing. This file has to be installed and patched manually: 4808c609719bSwdenk 4809c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4810c609719bSwdenk # mkdir powerpc 4811c609719bSwdenk # ln -s powerpc machine 4812c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4813c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4814c609719bSwdenk 4815c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4816c609719bSwdenkand U-Boot include files. 4817c609719bSwdenk 4818c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4819c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4820c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4821c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 48222a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4823c609719bSwdenk 4824c609719bSwdenk 4825c609719bSwdenkImplementation Internals: 4826c609719bSwdenk========================= 4827c609719bSwdenk 4828c609719bSwdenkThe following is not intended to be a complete description of every 4829c609719bSwdenkimplementation detail. However, it should help to understand the 4830c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4831c609719bSwdenkhardware. 4832c609719bSwdenk 4833c609719bSwdenk 4834c609719bSwdenkInitial Stack, Global Data: 4835c609719bSwdenk--------------------------- 4836c609719bSwdenk 4837c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4838c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4839c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4840c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4841c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4842c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4843c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4844c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4845c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4846c609719bSwdenklocked as (mis-) used as memory, etc. 4847c609719bSwdenk 48487152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 48490668236bSWolfgang Denk U-Boot mailing list: 485043d9616cSwdenk 485143d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 485243d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 485343d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 485443d9616cSwdenk ... 485543d9616cSwdenk 485643d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 485743d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 485843d9616cSwdenk require any physical RAM backing up the cache. The cleverness 485943d9616cSwdenk is that the cache is being used as a temporary supply of 486043d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 486111ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 486243d9616cSwdenk can see how this works by studying the cache architecture and 486343d9616cSwdenk operation in the architecture and processor-specific manuals. 486443d9616cSwdenk 486543d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 486643d9616cSwdenk is another option for the system designer to use as an 486711ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 486843d9616cSwdenk option should work for you. Using CS 4 should be fine if your 486943d9616cSwdenk board designers haven't used it for something that would 487043d9616cSwdenk cause you grief during the initial boot! It is frequently not 487143d9616cSwdenk used. 487243d9616cSwdenk 48736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 487443d9616cSwdenk with your processor/board/system design. The default value 487543d9616cSwdenk you will find in any recent u-boot distribution in 48768a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 487743d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 487843d9616cSwdenk it above 400_0000. Just make sure your board has no resources 487943d9616cSwdenk that are supposed to respond to that address! That code in 488043d9616cSwdenk start.S has been around a while and should work as is when 488143d9616cSwdenk you get the config right. 488243d9616cSwdenk 488343d9616cSwdenk -Chris Hallinan 488443d9616cSwdenk DS4.COM, Inc. 488543d9616cSwdenk 4886c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4887c609719bSwdenkcode for the initialization procedures: 4888c609719bSwdenk 4889c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4890c609719bSwdenk to write it. 4891c609719bSwdenk 489211ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4893c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 48947152b1d0Swdenk zation is performed later (when relocating to RAM). 4895c609719bSwdenk 4896c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4897c609719bSwdenk that. 4898c609719bSwdenk 4899c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4900c609719bSwdenknormal global data to share information beween the code. But it 4901c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4902c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4903c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4904c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4905c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4906c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4907c609719bSwdenkreserve for this purpose. 4908c609719bSwdenk 49097152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4910c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4911c609719bSwdenkGCC's implementation. 4912c609719bSwdenk 4913c609719bSwdenkFor PowerPC, the following registers have specific use: 4914c609719bSwdenk R1: stack pointer 4915e7670f6cSWolfgang Denk R2: reserved for system use 4916c609719bSwdenk R3-R4: parameter passing and return values 4917c609719bSwdenk R5-R10: parameter passing 4918c609719bSwdenk R13: small data area pointer 4919c609719bSwdenk R30: GOT pointer 4920c609719bSwdenk R31: frame pointer 4921c609719bSwdenk 4922e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4923e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4924e6bee808SJoakim Tjernlund going back and forth between asm and C) 4925c609719bSwdenk 4926e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4927c609719bSwdenk 4928c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4929c609719bSwdenk address of the global data structure is known at compile time), 4930c609719bSwdenk but it turned out that reserving a register results in somewhat 4931c609719bSwdenk smaller code - although the code savings are not that big (on 4932c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4933c609719bSwdenk 624 text + 127 data). 4934c609719bSwdenk 4935c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 49364c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 49374c58eb55SMike Frysinger 4938c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 49394c58eb55SMike Frysinger 4940c609719bSwdenkOn ARM, the following registers are used: 4941c609719bSwdenk 4942c609719bSwdenk R0: function argument word/integer result 4943c609719bSwdenk R1-R3: function argument word 4944c609719bSwdenk R9: GOT pointer 4945c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4946c609719bSwdenk R11: argument (frame) pointer 4947c609719bSwdenk R12: temporary workspace 4948c609719bSwdenk R13: stack pointer 4949c609719bSwdenk R14: link register 4950c609719bSwdenk R15: program counter 4951c609719bSwdenk 4952c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4953c609719bSwdenk 49540df01fd3SThomas ChouOn Nios II, the ABI is documented here: 49550df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 49560df01fd3SThomas Chou 49570df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 49580df01fd3SThomas Chou 49590df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 49600df01fd3SThomas Chou to access small data sections, so gp is free. 49610df01fd3SThomas Chou 4962afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4963afc1ce82SMacpaul Lin 4964afc1ce82SMacpaul Lin R0-R1: argument/return 4965afc1ce82SMacpaul Lin R2-R5: argument 4966afc1ce82SMacpaul Lin R15: temporary register for assembler 4967afc1ce82SMacpaul Lin R16: trampoline register 4968afc1ce82SMacpaul Lin R28: frame pointer (FP) 4969afc1ce82SMacpaul Lin R29: global pointer (GP) 4970afc1ce82SMacpaul Lin R30: link register (LP) 4971afc1ce82SMacpaul Lin R31: stack pointer (SP) 4972afc1ce82SMacpaul Lin PC: program counter (PC) 4973afc1ce82SMacpaul Lin 4974afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4975afc1ce82SMacpaul Lin 4976d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4977d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4978c609719bSwdenk 4979c609719bSwdenkMemory Management: 4980c609719bSwdenk------------------ 4981c609719bSwdenk 4982c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4983c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4984c609719bSwdenk 4985c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4986c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4987c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4988c609719bSwdenkphysical memory banks. 4989c609719bSwdenk 4990c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4991c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4992c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4993c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 49946d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4995c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4996c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4997c609719bSwdenk 4998c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4999c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5000c609719bSwdenk 5001c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5002c609719bSwdenkthis: 5003c609719bSwdenk 5004c609719bSwdenk 0x0000 0000 Exception Vector code 5005c609719bSwdenk : 5006c609719bSwdenk 0x0000 1FFF 5007c609719bSwdenk 0x0000 2000 Free for Application Use 5008c609719bSwdenk : 5009c609719bSwdenk : 5010c609719bSwdenk 5011c609719bSwdenk : 5012c609719bSwdenk : 5013c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5014c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5015c609719bSwdenk 0x00FC 0000 Malloc Arena 5016c609719bSwdenk : 5017c609719bSwdenk 0x00FD FFFF 5018c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5019c609719bSwdenk ... eventually: LCD or video framebuffer 5020c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5021c609719bSwdenk 0x00FF FFFF [End of RAM] 5022c609719bSwdenk 5023c609719bSwdenk 5024c609719bSwdenkSystem Initialization: 5025c609719bSwdenk---------------------- 5026c609719bSwdenk 5027c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 502811ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5029c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 50307152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5031c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5032c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5033c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5034c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5035c609719bSwdenkthe caches and the SIU. 5036c609719bSwdenk 5037c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5038c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5039c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5040c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5041c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5042c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5043c609719bSwdenkbanks. 5044c609719bSwdenk 5045c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 50467152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5047c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5048c609719bSwdenk0x00000000, with any additional banks following immediately to create 5049c609719bSwdenkcontiguous memory starting from 0. 5050c609719bSwdenk 5051c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5052c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5053c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5054c609719bSwdenkpages, and the final stack is set up. 5055c609719bSwdenk 5056c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5057c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5058c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5059c609719bSwdenknew address in RAM. 5060c609719bSwdenk 5061c609719bSwdenk 5062c609719bSwdenkU-Boot Porting Guide: 5063c609719bSwdenk---------------------- 5064c609719bSwdenk 5065c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 50666aff3115Swdenklist, October 2002] 5067c609719bSwdenk 5068c609719bSwdenk 5069c609719bSwdenkint main(int argc, char *argv[]) 5070c609719bSwdenk{ 5071c609719bSwdenk sighandler_t no_more_time; 5072c609719bSwdenk 5073c609719bSwdenk signal(SIGALRM, no_more_time); 5074c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5075c609719bSwdenk 5076c609719bSwdenk if (available_money > available_manpower) { 50776c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5078c609719bSwdenk return 0; 5079c609719bSwdenk } 5080c609719bSwdenk 5081c609719bSwdenk Download latest U-Boot source; 5082c609719bSwdenk 50830668236bSWolfgang Denk Subscribe to u-boot mailing list; 50846aff3115Swdenk 50856c3fef28SJerry Van Baren if (clueless) 5086c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5087c609719bSwdenk 5088c609719bSwdenk while (learning) { 5089c609719bSwdenk Read the README file in the top level directory; 50907cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 50916c3fef28SJerry Van Baren Read applicable doc/*.README; 5092c609719bSwdenk Read the source, Luke; 50936c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5094c609719bSwdenk } 5095c609719bSwdenk 50966c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 50976c3fef28SJerry Van Baren Buy a BDI3000; 50986c3fef28SJerry Van Baren else 5099c609719bSwdenk Add a lot of aggravation and time; 5100c609719bSwdenk 51016c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 51026c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 51036c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 51046c3fef28SJerry Van Baren } else { 5105c609719bSwdenk Create your own board support subdirectory; 51066c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 51076c3fef28SJerry Van Baren } 51086c3fef28SJerry Van Baren Edit new board/<myboard> files 51096c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5110c609719bSwdenk 51116c3fef28SJerry Van Baren while (!accepted) { 5112c609719bSwdenk while (!running) { 5113c609719bSwdenk do { 5114c609719bSwdenk Add / modify source code; 5115c609719bSwdenk } until (compiles); 5116c609719bSwdenk Debug; 5117c609719bSwdenk if (clueless) 5118c609719bSwdenk email("Hi, I am having problems..."); 5119c609719bSwdenk } 51206c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 51216c3fef28SJerry Van Baren if (reasonable critiques) 51226c3fef28SJerry Van Baren Incorporate improvements from email list code review; 51236c3fef28SJerry Van Baren else 51246c3fef28SJerry Van Baren Defend code as written; 51256c3fef28SJerry Van Baren } 5126c609719bSwdenk 5127c609719bSwdenk return 0; 5128c609719bSwdenk} 5129c609719bSwdenk 5130c609719bSwdenkvoid no_more_time (int sig) 5131c609719bSwdenk{ 5132c609719bSwdenk hire_a_guru(); 5133c609719bSwdenk} 5134c609719bSwdenk 5135c609719bSwdenk 5136c609719bSwdenkCoding Standards: 5137c609719bSwdenk----------------- 5138c609719bSwdenk 5139c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 51402c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 51417ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5142c609719bSwdenk 51432c051651SDetlev ZundelSource files originating from a different project (for example the 51442c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 51452c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 51462c051651SDetlev Zundelsources. 51472c051651SDetlev Zundel 51482c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 51492c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 51502c051651SDetlev Zundelin your code. 5151c609719bSwdenk 5152c178d3daSwdenkPlease also stick to the following formatting rules: 5153180d3f74Swdenk- remove any trailing white space 51547ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5155180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 51567ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5157180d3f74Swdenk- do not add trailing empty lines to source files 5158180d3f74Swdenk 5159c609719bSwdenkSubmissions which do not conform to the standards may be returned 5160c609719bSwdenkwith a request to reformat the changes. 5161c609719bSwdenk 5162c609719bSwdenk 5163c609719bSwdenkSubmitting Patches: 5164c609719bSwdenk------------------- 5165c609719bSwdenk 5166c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5167c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5168c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5169c609719bSwdenk 51700d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5171218ca724SWolfgang Denk 51720668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 51730668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 51740668236bSWolfgang Denk 5175c609719bSwdenkWhen you send a patch, please include the following information with 5176c609719bSwdenkit: 5177c609719bSwdenk 5178c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5179c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5180c609719bSwdenk patch actually fixes something. 5181c609719bSwdenk 5182c609719bSwdenk* For new features: a description of the feature and your 5183c609719bSwdenk implementation. 5184c609719bSwdenk 5185c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5186c609719bSwdenk 5187c609719bSwdenk* For major contributions, your entry to the CREDITS file 5188c609719bSwdenk 5189c609719bSwdenk* When you add support for a new board, don't forget to add this 51907ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5191c609719bSwdenk 5192c609719bSwdenk* If your patch adds new configuration options, don't forget to 5193c609719bSwdenk document these in the README file. 5194c609719bSwdenk 5195218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5196218ca724SWolfgang Denk recommended) you can easily generate the patch using the 51977ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5198218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5199218ca724SWolfgang Denk with some other mail clients. 5200c609719bSwdenk 5201218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5202218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5203218ca724SWolfgang Denk GNU diff. 52046dff5529Swdenk 5205218ca724SWolfgang Denk The current directory when running this command shall be the parent 5206218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5207218ca724SWolfgang Denk your patch includes sufficient directory information for the 5208218ca724SWolfgang Denk affected files). 5209218ca724SWolfgang Denk 5210218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5211218ca724SWolfgang Denk and compressed attachments must not be used. 5212c609719bSwdenk 521352f52c14Swdenk* If one logical set of modifications affects or creates several 521452f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 521552f52c14Swdenk 521652f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 521752f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 521852f52c14Swdenk 521952f52c14Swdenk 5220c609719bSwdenkNotes: 5221c609719bSwdenk 5222c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5223c609719bSwdenk source tree and make sure that no errors or warnings are reported 5224c609719bSwdenk for any of the boards. 5225c609719bSwdenk 5226c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5227c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5228c609719bSwdenk returned with a request to re-formatting / split it. 5229c609719bSwdenk 5230c609719bSwdenk* If you modify existing code, make sure that your new code does not 5231c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5232c609719bSwdenk When adding new features, these should compile conditionally only 5233c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5234c609719bSwdenk disabled must not need more memory than the old code without your 5235c609719bSwdenk modification. 523690dc6704Swdenk 52370668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 52380668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 52390668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 52400668236bSWolfgang Denk bigger than the size limit should be avoided. 5241