1c609719bSwdenk# 26abe6fb6SDetlev Zundel# (C) Copyright 2000 - 2011 3c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4c609719bSwdenk# 5c609719bSwdenk# See file CREDITS for list of people who contributed to this 6c609719bSwdenk# project. 7c609719bSwdenk# 8c609719bSwdenk# This program is free software; you can redistribute it and/or 9c609719bSwdenk# modify it under the terms of the GNU General Public License as 10c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11c609719bSwdenk# the License, or (at your option) any later version. 12c609719bSwdenk# 13c609719bSwdenk# This program is distributed in the hope that it will be useful, 14c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16c609719bSwdenk# GNU General Public License for more details. 17c609719bSwdenk# 18c609719bSwdenk# You should have received a copy of the GNU General Public License 19c609719bSwdenk# along with this program; if not, write to the Free Software 20c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21c609719bSwdenk# MA 02111-1307 USA 22c609719bSwdenk# 23c609719bSwdenk 24c609719bSwdenkSummary: 25c609719bSwdenk======== 26c609719bSwdenk 2724ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30e86e5a07Swdenkinitialize and test the hardware or to download and run application 31e86e5a07Swdenkcode. 32c609719bSwdenk 33c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 3424ee89b9Swdenkthe source code originate in the Linux source tree, we have some 3524ee89b9Swdenkheader files in common, and special provision has been made to 36c609719bSwdenksupport booting of Linux images. 37c609719bSwdenk 38c609719bSwdenkSome attention has been paid to make this software easily 39c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43c609719bSwdenkload and run it dynamically. 44c609719bSwdenk 45c609719bSwdenk 46c609719bSwdenkStatus: 47c609719bSwdenk======= 48c609719bSwdenk 49c609719bSwdenkIn general, all boards for which a configuration option exists in the 50c609719bSwdenkMakefile have been tested to some extent and can be considered 51c609719bSwdenk"working". In fact, many of them are used in production systems. 52c609719bSwdenk 53c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55218ca724SWolfgang Denkmaintainers. 56c609719bSwdenk 57c609719bSwdenk 58c609719bSwdenkWhere to get help: 59c609719bSwdenk================== 60c609719bSwdenk 61c609719bSwdenkIn case you have questions about, problems with or contributions for 62c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 630c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 640c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 650c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 660c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 67c609719bSwdenk 68c609719bSwdenk 69218ca724SWolfgang DenkWhere to get source code: 70218ca724SWolfgang Denk========================= 71218ca724SWolfgang Denk 72218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75218ca724SWolfgang Denk 76218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 7711ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 78218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79218ca724SWolfgang Denkdirectory. 80218ca724SWolfgang Denk 81d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83218ca724SWolfgang Denk 84218ca724SWolfgang Denk 85c609719bSwdenkWhere we come from: 86c609719bSwdenk=================== 87c609719bSwdenk 88c609719bSwdenk- start from 8xxrom sources 8924ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90c609719bSwdenk- clean up code 91c609719bSwdenk- make it easier to add custom boards 92c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93c609719bSwdenk- extend functions, especially: 94c609719bSwdenk * Provide extended interface to Linux boot loader 95c609719bSwdenk * S-Record download 96c609719bSwdenk * network boot 9711ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 9824ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99c609719bSwdenk- add other CPU families (starting with ARM) 10024ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 1010d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 10224ee89b9Swdenk 10324ee89b9Swdenk 10424ee89b9SwdenkNames and Spelling: 10524ee89b9Swdenk=================== 10624ee89b9Swdenk 10724ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 10824ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 10924ee89b9Swdenkin source files etc.). Example: 11024ee89b9Swdenk 11124ee89b9Swdenk This is the README file for the U-Boot project. 11224ee89b9Swdenk 11324ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 11424ee89b9Swdenk 11524ee89b9Swdenk include/asm-ppc/u-boot.h 11624ee89b9Swdenk 11724ee89b9Swdenk #include <asm/u-boot.h> 11824ee89b9Swdenk 11924ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 12024ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 12124ee89b9Swdenk 12224ee89b9Swdenk U_BOOT_VERSION u_boot_logo 12324ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124c609719bSwdenk 125c609719bSwdenk 12693f19cc0SwdenkVersioning: 12793f19cc0Swdenk=========== 12893f19cc0Swdenk 129360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 130360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 131360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 132360d883aSThomas Webernames consisting of the calendar year and month of the release date. 133360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 134360d883aSThomas Weberreleases in "stable" maintenance trees. 13593f19cc0Swdenk 136360d883aSThomas WeberExamples: 137360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 138360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 139360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 14093f19cc0Swdenk 14193f19cc0Swdenk 142c609719bSwdenkDirectory Hierarchy: 143c609719bSwdenk==================== 144c609719bSwdenk 1458d321b81SPeter Tyser/arch Architecture specific files 1468d321b81SPeter Tyser /arm Files generic to ARM architecture 1478d321b81SPeter Tyser /cpu CPU specific files 1488d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1498d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1506eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1518d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1528d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1538d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 1548d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1558d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1568d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 1578d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1588d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 1598d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1608d321b81SPeter Tyser /lib Architecture specific library files 1618d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1628d321b81SPeter Tyser /cpu CPU specific files 1638d321b81SPeter Tyser /lib Architecture specific library files 1648d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1658d321b81SPeter Tyser /cpu CPU specific files 1668d321b81SPeter Tyser /lib Architecture specific library files 167fea25720SGraeme Russ /x86 Files generic to x86 architecture 1688d321b81SPeter Tyser /cpu CPU specific files 1698d321b81SPeter Tyser /lib Architecture specific library files 1708d321b81SPeter Tyser /m68k Files generic to m68k architecture 1718d321b81SPeter Tyser /cpu CPU specific files 1728d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1738d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1748d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1758d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1768d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1778d321b81SPeter Tyser /lib Architecture specific library files 1788d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1798d321b81SPeter Tyser /cpu CPU specific files 1808d321b81SPeter Tyser /lib Architecture specific library files 1818d321b81SPeter Tyser /mips Files generic to MIPS architecture 1828d321b81SPeter Tyser /cpu CPU specific files 18392bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 18480421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 1858d321b81SPeter Tyser /lib Architecture specific library files 186afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 187afc1ce82SMacpaul Lin /cpu CPU specific files 188afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 189afc1ce82SMacpaul Lin /lib Architecture specific library files 1908d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1918d321b81SPeter Tyser /cpu CPU specific files 1928d321b81SPeter Tyser /lib Architecture specific library files 193a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1948d321b81SPeter Tyser /cpu CPU specific files 1958d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1968d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1978d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1988d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1998d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 2008d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 2018d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 2028d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 2038d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 2048d321b81SPeter Tyser /lib Architecture specific library files 2058d321b81SPeter Tyser /sh Files generic to SH architecture 2068d321b81SPeter Tyser /cpu CPU specific files 2078d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 2088d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 2098d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 2108d321b81SPeter Tyser /lib Architecture specific library files 2118d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2128d321b81SPeter Tyser /cpu CPU specific files 2138d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2148d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2158d321b81SPeter Tyser /lib Architecture specific library files 2168d321b81SPeter Tyser/api Machine/arch independent API for external apps 2178d321b81SPeter Tyser/board Board dependent files 2188d321b81SPeter Tyser/common Misc architecture independent functions 2198d321b81SPeter Tyser/disk Code for disk drive partition handling 2208d321b81SPeter Tyser/doc Documentation (don't expect too much) 2218d321b81SPeter Tyser/drivers Commonly used device drivers 2228d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2238d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2248d321b81SPeter Tyser/include Header Files 2258d321b81SPeter Tyser/lib Files generic to all architectures 2268d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2278d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2288d321b81SPeter Tyser /lzo Library files to support LZO decompression 2298d321b81SPeter Tyser/net Networking code 2308d321b81SPeter Tyser/post Power On Self Test 2318d321b81SPeter Tyser/rtc Real Time Clock drivers 2328d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 233c609719bSwdenk 234c609719bSwdenkSoftware Configuration: 235c609719bSwdenk======================= 236c609719bSwdenk 237c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 238c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 239c609719bSwdenk 240c609719bSwdenkThere are two classes of configuration variables: 241c609719bSwdenk 242c609719bSwdenk* Configuration _OPTIONS_: 243c609719bSwdenk These are selectable by the user and have names beginning with 244c609719bSwdenk "CONFIG_". 245c609719bSwdenk 246c609719bSwdenk* Configuration _SETTINGS_: 247c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 248c609719bSwdenk you don't know what you're doing; they have names beginning with 2496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 250c609719bSwdenk 251c609719bSwdenkLater we will add a configuration tool - probably similar to or even 252c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 253c609719bSwdenkdo the configuration by hand, which means creating some symbolic 254c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 255c609719bSwdenkas an example here. 256c609719bSwdenk 257c609719bSwdenk 258c609719bSwdenkSelection of Processor Architecture and Board Type: 259c609719bSwdenk--------------------------------------------------- 260c609719bSwdenk 261c609719bSwdenkFor all supported boards there are ready-to-use default 262c609719bSwdenkconfigurations available; just type "make <board_name>_config". 263c609719bSwdenk 264c609719bSwdenkExample: For a TQM823L module type: 265c609719bSwdenk 266c609719bSwdenk cd u-boot 267c609719bSwdenk make TQM823L_config 268c609719bSwdenk 26911ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 270c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 271c609719bSwdenkdirectory according to the instructions in cogent/README. 272c609719bSwdenk 273c609719bSwdenk 274c609719bSwdenkConfiguration Options: 275c609719bSwdenk---------------------- 276c609719bSwdenk 277c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 278c609719bSwdenksuch information is kept in a configuration file 279c609719bSwdenk"include/configs/<board_name>.h". 280c609719bSwdenk 281c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 282c609719bSwdenk"include/configs/TQM823L.h". 283c609719bSwdenk 284c609719bSwdenk 2857f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2867f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2877f6c2cbcSwdenkbuild a config tool - later. 2887f6c2cbcSwdenk 2897f6c2cbcSwdenk 290c609719bSwdenkThe following options need to be configured: 291c609719bSwdenk 2922628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 293c609719bSwdenk 2942628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2956ccec449SWolfgang Denk 2966ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 29709ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 298c609719bSwdenk 299c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 300c609719bSwdenk Define exactly one of 301c609719bSwdenk CONFIG_CMA286_60_OLD 302c609719bSwdenk--- FIXME --- not tested yet: 303c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 304c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 305c609719bSwdenk 306c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 307c609719bSwdenk Define exactly one of 308c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 309c609719bSwdenk 310c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 311c609719bSwdenk Define one or more of 312c609719bSwdenk CONFIG_CMA302 313c609719bSwdenk 314c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 315c609719bSwdenk Define one or more of 316c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 31711ccc33fSMarcel Ziswiler the LCD display every second with 318c609719bSwdenk a "rotator" |\-/|\-/ 319c609719bSwdenk 3202535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3212535d602Swdenk CONFIG_ADSTYPE 3222535d602Swdenk Possible values are: 3236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3272535d602Swdenk 328cf946c6dSLei Wen- Marvell Family Member 329cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 330cf946c6dSLei Wen multiple fs option at one time 331cf946c6dSLei Wen for marvell soc family 332cf946c6dSLei Wen 333c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 334c609719bSwdenk Define exactly one of 335c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 336c609719bSwdenk 33711ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 33866ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 33966ca92a5Swdenk get_gclk_freq() cannot work 3405da627a4Swdenk e.g. if there is no 32KHz 3415da627a4Swdenk reference PIT/RTC clock 34266ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 34366ca92a5Swdenk or XTAL/EXTAL) 344c609719bSwdenk 34566ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 34866ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 34975d1ea7fSwdenk See doc/README.MPC866 35075d1ea7fSwdenk 3516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 35275d1ea7fSwdenk 35375d1ea7fSwdenk Define this to measure the actual CPU clock instead 35475d1ea7fSwdenk of relying on the correctness of the configured 35575d1ea7fSwdenk values. Mostly useful for board bringup to make sure 35675d1ea7fSwdenk the PLL is locked at the intended frequency. Note 35775d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 35975d1ea7fSwdenk 360506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 361506f3918SHeiko Schocher 362506f3918SHeiko Schocher Define this option if you want to enable the 363506f3918SHeiko Schocher ICache only when Code runs from RAM. 364506f3918SHeiko Schocher 36566412c63SKumar Gala- 85xx CPU Options: 36666412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36766412c63SKumar Gala 36866412c63SKumar Gala Defines the core time base clock divider ratio compared to the 36966412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 37066412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37166412c63SKumar Gala 3728f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3738f29084aSKumar Gala 3748f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3758f29084aSKumar Gala tree nodes for the given platform. 3768f29084aSKumar Gala 3770b953ffcSMarkus Klotzbuecher- Intel Monahans options: 3786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 3790b953ffcSMarkus Klotzbuecher 3800b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 3810b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 3820b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 3830b953ffcSMarkus Klotzbuecher 3846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 3850b953ffcSMarkus Klotzbuecher 3860b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 3870b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 3880b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 3890b953ffcSMarkus Klotzbuecher by this value. 3900b953ffcSMarkus Klotzbuecher 39192bbd64eSDaniel Schwierzeck- MIPS CPU options: 39292bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 39392bbd64eSDaniel Schwierzeck 39492bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 39592bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 39692bbd64eSDaniel Schwierzeck relocation. 39792bbd64eSDaniel Schwierzeck 39892bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 39992bbd64eSDaniel Schwierzeck 40092bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 40192bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 40292bbd64eSDaniel Schwierzeck Possible values are: 40392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 40492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 40592bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 40692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 40792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 40892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 40992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 41092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 41192bbd64eSDaniel Schwierzeck 41292bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 41392bbd64eSDaniel Schwierzeck 41492bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 41592bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 41692bbd64eSDaniel Schwierzeck 41792bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 41892bbd64eSDaniel Schwierzeck 41992bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 42092bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 42192bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 42292bbd64eSDaniel Schwierzeck 4235da627a4Swdenk- Linux Kernel Interface: 424c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 425c609719bSwdenk 426c609719bSwdenk U-Boot stores all clock information in Hz 427c609719bSwdenk internally. For binary compatibility with older Linux 428c609719bSwdenk kernels (which expect the clocks passed in the 429c609719bSwdenk bd_info data to be in MHz) the environment variable 430c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 431c609719bSwdenk converts clock data to MHZ before passing it to the 432c609719bSwdenk Linux kernel. 433c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 434c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 435c609719bSwdenk default environment. 436c609719bSwdenk 4375da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 4385da627a4Swdenk 43911ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 4405da627a4Swdenk expect it to be in bytes, others in MB. 4415da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 4425da627a4Swdenk 443fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 444f57f70aaSWolfgang Denk 445f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 446213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 447213bf8c8SGerald Van Baren concepts). 448213bf8c8SGerald Van Baren 449213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 450213bf8c8SGerald Van Baren * New libfdt-based support 451213bf8c8SGerald Van Baren * Adds the "fdt" command 4523bb342fcSKim Phillips * The bootm command automatically updates the fdt 453213bf8c8SGerald Van Baren 454b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 455b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 456b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 457b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 458f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 459c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 460f57f70aaSWolfgang Denk 46111ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 46211ccc33fSMarcel Ziswiler addresses 4633bb342fcSKim Phillips 4644e253137SKumar Gala CONFIG_OF_BOARD_SETUP 4654e253137SKumar Gala 4664e253137SKumar Gala Board code has addition modification that it wants to make 4674e253137SKumar Gala to the flat device tree before handing it off to the kernel 4686705d81eSwdenk 4690267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 4700267768eSMatthew McClintock 47111ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 4720267768eSMatthew McClintock param header, the default value is zero if undefined. 4730267768eSMatthew McClintock 4743887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 4753887c3fbSHeiko Schocher 4763887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 4773887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 4783887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 4793887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 4803887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 4813887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 4823887c3fbSHeiko Schocher 4837eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 4847eb29398SIgor Grinberg 4857eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 4867eb29398SIgor Grinberg machine type and must be used to specify the machine type 4877eb29398SIgor Grinberg number as it appears in the ARM machine registry 4887eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 4897eb29398SIgor Grinberg Only boards that have multiple machine types supported 4907eb29398SIgor Grinberg in a single configuration file and the machine type is 4917eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 4927eb29398SIgor Grinberg 4930b2f4ecaSNiklaus Giger- vxWorks boot parameters: 4940b2f4ecaSNiklaus Giger 4950b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 4960b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 4970b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 4980b2f4ecaSNiklaus Giger 4990b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5000b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5010b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5020b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5030b2f4ecaSNiklaus Giger 5040b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5050b2f4ecaSNiklaus Giger 5060b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5070b2f4ecaSNiklaus Giger 5080b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5090b2f4ecaSNiklaus Giger the defaults discussed just above. 5100b2f4ecaSNiklaus Giger 5112c451f78SAneesh V- Cache Configuration: 5122c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 5132c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 5142c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 5152c451f78SAneesh V 51693bc2193SAneesh V- Cache Configuration for ARM: 51793bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 51893bc2193SAneesh V controller 51993bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 52093bc2193SAneesh V controller register space 52193bc2193SAneesh V 5226705d81eSwdenk- Serial Ports: 52348d0192fSAndreas Engel CONFIG_PL010_SERIAL 5246705d81eSwdenk 5256705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 5266705d81eSwdenk 52748d0192fSAndreas Engel CONFIG_PL011_SERIAL 5286705d81eSwdenk 5296705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 5306705d81eSwdenk 5316705d81eSwdenk CONFIG_PL011_CLOCK 5326705d81eSwdenk 5336705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 5346705d81eSwdenk the clock speed of the UARTs. 5356705d81eSwdenk 5366705d81eSwdenk CONFIG_PL01x_PORTS 5376705d81eSwdenk 5386705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 5396705d81eSwdenk define this to a list of base addresses for each (supported) 5406705d81eSwdenk port. See e.g. include/configs/versatile.h 5416705d81eSwdenk 542910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 543910f1ae3SJohn Rigby 544910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 545910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 546910f1ae3SJohn Rigby this variable to initialize the extra register. 547910f1ae3SJohn Rigby 548910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 549910f1ae3SJohn Rigby 550910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 551910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 552910f1ae3SJohn Rigby variable to flush the UART at init time. 553910f1ae3SJohn Rigby 5546705d81eSwdenk 555c609719bSwdenk- Console Interface: 556c609719bSwdenk Depending on board, define exactly one serial port 557c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 558c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 559c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 560c609719bSwdenk 561c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 562c609719bSwdenk port routines must be defined elsewhere 563c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 564c609719bSwdenk 565c609719bSwdenk CONFIG_CFB_CONSOLE 566c609719bSwdenk Enables console device for a color framebuffer. Needs following 567c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 568c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 569c609719bSwdenk (default big endian) 570c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 571c609719bSwdenk rectangle fill 572c609719bSwdenk (cf. smiLynxEM) 573c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 574c609719bSwdenk bit-blit (cf. smiLynxEM) 575c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 576c609719bSwdenk (cols=pitch) 577c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 578c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 579c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 580c609719bSwdenk (0-5, cf. cfb_console.c) 581c609719bSwdenk VIDEO_FB_ADRS framebuffer address 582c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 583c609719bSwdenk (i.e. i8042_kbd_init()) 584c609719bSwdenk VIDEO_TSTC_FCT test char fct 585c609719bSwdenk (i.e. i8042_tstc) 586c609719bSwdenk VIDEO_GETC_FCT get char fct 587c609719bSwdenk (i.e. i8042_getc) 588c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 589c609719bSwdenk (requires blink timer 590c609719bSwdenk cf. i8042.c) 5916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 592c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 593c609719bSwdenk upper right corner 594602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 595c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 596c609719bSwdenk upper left corner 597a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 598a6c7ad2fSwdenk linux_logo.h for logo. 599a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 600c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 60111ccc33fSMarcel Ziswiler additional board info beside 602c609719bSwdenk the logo 603c609719bSwdenk 604c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 605c609719bSwdenk default i/o. Serial console can be forced with 606c609719bSwdenk environment 'console=serial'. 607c609719bSwdenk 608a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 609a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 610a3ad8e26Swdenk the "silent" environment variable. See 611a3ad8e26Swdenk doc/README.silent for more information. 612a3ad8e26Swdenk 613c609719bSwdenk- Console Baudrate: 614c609719bSwdenk CONFIG_BAUDRATE - in bps 615c609719bSwdenk Select one of the baudrates listed in 6166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 618c609719bSwdenk 619c92fac91SHeiko Schocher- Console Rx buffer length 620c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 621c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6222b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 623c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 624c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 625c92fac91SHeiko Schocher the SMC. 626c92fac91SHeiko Schocher 6279558b48aSGraeme Russ- Pre-Console Buffer: 6289558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 6299558b48aSGraeme Russ initialised etc) all console output is silently discarded. 6309558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 6319558b48aSGraeme Russ buffer any console messages prior to the console being 6329558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 6339558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 6349558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 6359558b48aSGraeme Russ bytes are output before the console is initialised, the 6369558b48aSGraeme Russ earlier bytes are discarded. 6379558b48aSGraeme Russ 6389558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 6399558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 6409558b48aSGraeme Russ 641c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 642c609719bSwdenk Delay before automatically booting the default image; 643c609719bSwdenk set to -1 to disable autoboot. 644c609719bSwdenk 645c609719bSwdenk See doc/README.autoboot for these options that 646c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 647c609719bSwdenk CONFIG_BOOT_RETRY_TIME 648c609719bSwdenk CONFIG_BOOT_RETRY_MIN 649c609719bSwdenk CONFIG_AUTOBOOT_KEYED 650c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 651c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 652c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 653c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 654c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 655c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 656c609719bSwdenk CONFIG_RESET_TO_RETRY 657c609719bSwdenk 658c609719bSwdenk- Autoboot Command: 659c609719bSwdenk CONFIG_BOOTCOMMAND 660c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 661c609719bSwdenk define a command string that is automatically executed 662c609719bSwdenk when no character is read on the console interface 663c609719bSwdenk within "Boot Delay" after reset. 664c609719bSwdenk 665c609719bSwdenk CONFIG_BOOTARGS 666c609719bSwdenk This can be used to pass arguments to the bootm 667c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 668c609719bSwdenk environment value "bootargs". 669c609719bSwdenk 670c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 671c609719bSwdenk The value of these goes into the environment as 672c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 673c609719bSwdenk as a convenience, when switching between booting from 67411ccc33fSMarcel Ziswiler RAM and NFS. 675c609719bSwdenk 676c609719bSwdenk- Pre-Boot Commands: 677c609719bSwdenk CONFIG_PREBOOT 678c609719bSwdenk 679c609719bSwdenk When this option is #defined, the existence of the 680c609719bSwdenk environment variable "preboot" will be checked 681c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 682c609719bSwdenk countdown and/or running the auto-boot command resp. 683c609719bSwdenk entering interactive mode. 684c609719bSwdenk 685c609719bSwdenk This feature is especially useful when "preboot" is 686c609719bSwdenk automatically generated or modified. For an example 687c609719bSwdenk see the LWMON board specific code: here "preboot" is 688c609719bSwdenk modified when the user holds down a certain 689c609719bSwdenk combination of keys on the (special) keyboard when 690c609719bSwdenk booting the systems 691c609719bSwdenk 692c609719bSwdenk- Serial Download Echo Mode: 693c609719bSwdenk CONFIG_LOADS_ECHO 694c609719bSwdenk If defined to 1, all characters received during a 695c609719bSwdenk serial download (using the "loads" command) are 696c609719bSwdenk echoed back. This might be needed by some terminal 697c609719bSwdenk emulations (like "cu"), but may as well just take 698c609719bSwdenk time on others. This setting #define's the initial 699c609719bSwdenk value of the "loads_echo" environment variable. 700c609719bSwdenk 701602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 702c609719bSwdenk CONFIG_KGDB_BAUDRATE 703c609719bSwdenk Select one of the baudrates listed in 7046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 705c609719bSwdenk 706c609719bSwdenk- Monitor Functions: 707602ad3b3SJon Loeliger Monitor commands can be included or excluded 708602ad3b3SJon Loeliger from the build by using the #include files 709602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 710602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 711602ad3b3SJon Loeliger and augmenting with additional #define's 712602ad3b3SJon Loeliger for wanted commands. 713c609719bSwdenk 714602ad3b3SJon Loeliger The default command configuration includes all commands 715602ad3b3SJon Loeliger except those marked below with a "*". 716602ad3b3SJon Loeliger 717602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 718602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 719602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 720602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 721602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 722602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 723602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 724602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 725710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 726602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 727602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 728602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 729a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 730a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 731a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 732a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 733602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 734602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 735246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 736602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 737602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 7380c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 739bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 740602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 741602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 742602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 743602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 744602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 745a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 746a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 747602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 748602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 749602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 750602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 751602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 752602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 7530c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 754602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 755602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 756602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 757602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 7581ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 759602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 760602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 76102c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 76202c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 763602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 76456523f12Swdenk loop, loopw, mtest 765602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 766602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 767602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 76868d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 769602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 770602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 771e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 772e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 773602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 774602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 775602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 776602ad3b3SJon Loeliger host 777602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 778602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 779602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 780602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 781602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 782602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 783602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 784602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 785602ad3b3SJon Loeliger (4xx only) 786c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 78702c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 78874de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 789602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 7907a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 7911fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 792ca366d0eSChe-liang Chiou CONFIG_CMD_TIME * run command and report execution time 793602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 794602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 795602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 796c609719bSwdenk 797c609719bSwdenk 798c609719bSwdenk EXAMPLE: If you want all functions except of network 799c609719bSwdenk support you can write: 800c609719bSwdenk 801602ad3b3SJon Loeliger #include "config_cmd_all.h" 802602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 803c609719bSwdenk 804213bf8c8SGerald Van Baren Other Commands: 805213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 806c609719bSwdenk 807c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 808602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 809c609719bSwdenk what you (and your U-Boot users) are doing. Data 810c609719bSwdenk cache cannot be enabled on systems like the 8xx or 811c609719bSwdenk 8260 (where accesses to the IMMR region must be 812c609719bSwdenk uncached), and it cannot be disabled on all other 813c609719bSwdenk systems where we (mis-) use the data cache to hold an 814c609719bSwdenk initial stack and some data. 815c609719bSwdenk 816c609719bSwdenk 817c609719bSwdenk XXX - this list needs to get updated! 818c609719bSwdenk 81945ba8077SSimon Glass- Device tree: 82045ba8077SSimon Glass CONFIG_OF_CONTROL 82145ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 82245ba8077SSimon Glass to configure its devices, instead of relying on statically 82345ba8077SSimon Glass compiled #defines in the board file. This option is 82445ba8077SSimon Glass experimental and only available on a few boards. The device 82545ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 82645ba8077SSimon Glass 827*bbb0b128SSimon Glass U-Boot needs to get its device tree from somewhere. At present 828*bbb0b128SSimon Glass the only way is to embed it in the image with CONFIG_OF_EMBED. 829*bbb0b128SSimon Glass 830*bbb0b128SSimon Glass CONFIG_OF_EMBED 831*bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 832*bbb0b128SSimon Glass binary in its image. This device tree file should be in the 833*bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 834*bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 835*bbb0b128SSimon Glass the global data structure as gd->blob. 83645ba8077SSimon Glass 837c609719bSwdenk- Watchdog: 838c609719bSwdenk CONFIG_WATCHDOG 839c609719bSwdenk If this variable is defined, it enables watchdog 8406abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 8416abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 8426abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 8436abe6fb6SDetlev Zundel register. When supported for a specific SoC is 8446abe6fb6SDetlev Zundel available, then no further board specific code should 8456abe6fb6SDetlev Zundel be needed to use it. 8466abe6fb6SDetlev Zundel 8476abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 8486abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 8496abe6fb6SDetlev Zundel SoC, then define this variable and provide board 8506abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 851c609719bSwdenk 852c1551ea8Sstroese- U-Boot Version: 853c1551ea8Sstroese CONFIG_VERSION_VARIABLE 854c1551ea8Sstroese If this variable is defined, an environment variable 855c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 856c1551ea8Sstroese version as printed by the "version" command. 857c1551ea8Sstroese This variable is readonly. 858c1551ea8Sstroese 859c609719bSwdenk- Real-Time Clock: 860c609719bSwdenk 861602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 862c609719bSwdenk has to be selected, too. Define exactly one of the 863c609719bSwdenk following options: 864c609719bSwdenk 865c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 866c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 8677ce63709SGuennadi Liakhovetski CONFIG_RTC_MC13783 - use MC13783 RTC 868c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 8691cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 870c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 8717f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 8723bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 8739536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 8744c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 8756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 87671d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 87771d19f30SHeiko Schocher RV3029 RTC. 878c609719bSwdenk 879b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 880b37c7e5eSwdenk must also be configured. See I2C Support, below. 881b37c7e5eSwdenk 882e92739d3SPeter Tyser- GPIO Support: 883e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 884e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 885e92739d3SPeter Tyser 8865dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 8875dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 8885dec49caSChris Packham pins supported by a particular chip. 8895dec49caSChris Packham 890e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 891e92739d3SPeter Tyser must also be configured. See I2C Support, below. 892e92739d3SPeter Tyser 893c609719bSwdenk- Timestamp Support: 894c609719bSwdenk 895c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 896c609719bSwdenk (date and time) of an image is printed by image 897c609719bSwdenk commands like bootm or iminfo. This option is 898602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 899c609719bSwdenk 900c609719bSwdenk- Partition Support: 901c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 90207f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 903c609719bSwdenk 904602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 905218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 906218ca724SWolfgang Denk least one partition type as well. 907c609719bSwdenk 908c609719bSwdenk- IDE Reset method: 9094d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 9104d13cbadSwdenk board configurations files but used nowhere! 911c609719bSwdenk 9124d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 9134d13cbadSwdenk be performed by calling the function 9144d13cbadSwdenk ide_set_reset(int reset) 9154d13cbadSwdenk which has to be defined in a board specific file 916c609719bSwdenk 917c609719bSwdenk- ATAPI Support: 918c609719bSwdenk CONFIG_ATAPI 919c609719bSwdenk 920c609719bSwdenk Set this to enable ATAPI support. 921c609719bSwdenk 922c40b2956Swdenk- LBA48 Support 923c40b2956Swdenk CONFIG_LBA48 924c40b2956Swdenk 925c40b2956Swdenk Set this to enable support for disks larger than 137GB 9264b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 927c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 928c40b2956Swdenk support disks up to 2.1TB. 929c40b2956Swdenk 9306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 931c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 932c40b2956Swdenk Default is 32bit. 933c40b2956Swdenk 934c609719bSwdenk- SCSI Support: 935c609719bSwdenk At the moment only there is only support for the 936c609719bSwdenk SYM53C8XX SCSI controller; define 937c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 938c609719bSwdenk 9396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 9406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 9416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 942c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 943c609719bSwdenk devices. 9446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 945c609719bSwdenk 946c609719bSwdenk- NETWORK Support (PCI): 947682011ffSwdenk CONFIG_E1000 948682011ffSwdenk Support for Intel 8254x gigabit chips. 949682011ffSwdenk 950ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 95111ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 952ac3315c2SAndre Schwarz 953c609719bSwdenk CONFIG_EEPRO100 954c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 95511ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 956c609719bSwdenk write routine for first time initialisation. 957c609719bSwdenk 958c609719bSwdenk CONFIG_TULIP 959c609719bSwdenk Support for Digital 2114x chips. 960c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 961c609719bSwdenk modem chip initialisation (KS8761/QS6611). 962c609719bSwdenk 963c609719bSwdenk CONFIG_NATSEMI 964c609719bSwdenk Support for National dp83815 chips. 965c609719bSwdenk 966c609719bSwdenk CONFIG_NS8382X 967c609719bSwdenk Support for National dp8382[01] gigabit chips. 968c609719bSwdenk 96945219c46Swdenk- NETWORK Support (other): 97045219c46Swdenk 971c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 972c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 973c041e9d2SJens Scharsig 974c041e9d2SJens Scharsig CONFIG_RMII 975c041e9d2SJens Scharsig Define this to use reduced MII inteface 976c041e9d2SJens Scharsig 977c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 978c041e9d2SJens Scharsig If this defined, the driver is quiet. 979c041e9d2SJens Scharsig The driver doen't show link status messages. 980c041e9d2SJens Scharsig 98145219c46Swdenk CONFIG_DRIVER_LAN91C96 98245219c46Swdenk Support for SMSC's LAN91C96 chips. 98345219c46Swdenk 98445219c46Swdenk CONFIG_LAN91C96_BASE 98545219c46Swdenk Define this to hold the physical address 98645219c46Swdenk of the LAN91C96's I/O space 98745219c46Swdenk 98845219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 98945219c46Swdenk Define this to enable 32 bit addressing 99045219c46Swdenk 991f39748aeSwdenk CONFIG_DRIVER_SMC91111 992f39748aeSwdenk Support for SMSC's LAN91C111 chip 993f39748aeSwdenk 994f39748aeSwdenk CONFIG_SMC91111_BASE 995f39748aeSwdenk Define this to hold the physical address 996f39748aeSwdenk of the device (I/O space) 997f39748aeSwdenk 998f39748aeSwdenk CONFIG_SMC_USE_32_BIT 999f39748aeSwdenk Define this if data bus is 32 bits 1000f39748aeSwdenk 1001f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1002f39748aeSwdenk Define this to use i/o functions instead of macros 1003f39748aeSwdenk (some hardware wont work with macros) 1004f39748aeSwdenk 1005b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1006b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1007b3dbf4a5SMacpaul Lin 1008b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1009b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1010b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1011b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1012b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1013b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1014b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1015b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1016b3dbf4a5SMacpaul Lin 1017c2fff331SMike Rapoport CONFIG_SMC911X 1018557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1019557b377dSJens Gehrlein 1020c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1021557b377dSJens Gehrlein Define this to hold the physical address 1022557b377dSJens Gehrlein of the device (I/O space) 1023557b377dSJens Gehrlein 1024c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1025557b377dSJens Gehrlein Define this if data bus is 32 bits 1026557b377dSJens Gehrlein 1027c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1028557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1029557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1030c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1031557b377dSJens Gehrlein 10323d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 10333d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 10343d0075faSYoshihiro Shimoda 10353d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 10363d0075faSYoshihiro Shimoda Define the number of ports to be used 10373d0075faSYoshihiro Shimoda 10383d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 10393d0075faSYoshihiro Shimoda Define the ETH PHY's address 10403d0075faSYoshihiro Shimoda 104168260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 104268260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 104368260aabSYoshihiro Shimoda 1044c609719bSwdenk- USB Support: 1045c609719bSwdenk At the moment only the UHCI host controller is 10464d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1047c609719bSwdenk CONFIG_USB_UHCI to enable it. 1048c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 104930d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1050c609719bSwdenk storage devices. 1051c609719bSwdenk Note: 1052c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1053c609719bSwdenk (TEAC FD-05PUB). 10544d13cbadSwdenk MPC5200 USB requires additional defines: 10554d13cbadSwdenk CONFIG_USB_CLOCK 10564d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1057307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1058307ecb6dSEric Millbrandt for USB on PSC3 10594d13cbadSwdenk CONFIG_USB_CONFIG 10604d13cbadSwdenk for differential drivers: 0x00001000 10614d13cbadSwdenk for single ended drivers: 0x00005000 1062307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1063307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 10646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1065fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1066fdcfaa1bSZhang Wei instead of using asynchronous interrupts 10674d13cbadSwdenk 106816c8d5e7SWolfgang Denk- USB Device: 106916c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 107016c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 107116c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 107211ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 107316c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 107416c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 107516c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 107616c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 107716c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 107816c8d5e7SWolfgang Denk a Linux host by 107916c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 108016c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 108116c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 108216c8d5e7SWolfgang Denk might be defined in YourBoardName.h 108316c8d5e7SWolfgang Denk 108416c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 108516c8d5e7SWolfgang Denk Define this to build a UDC device 108616c8d5e7SWolfgang Denk 108716c8d5e7SWolfgang Denk CONFIG_USB_TTY 108816c8d5e7SWolfgang Denk Define this to have a tty type of device available to 108916c8d5e7SWolfgang Denk talk to the UDC device 109016c8d5e7SWolfgang Denk 10916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 109216c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 109316c8d5e7SWolfgang Denk be set to usbtty. 109416c8d5e7SWolfgang Denk 109516c8d5e7SWolfgang Denk mpc8xx: 10966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 109716c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 10986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 109916c8d5e7SWolfgang Denk 11006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 110116c8d5e7SWolfgang Denk Derive USB clock from brgclk 11026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 110316c8d5e7SWolfgang Denk 110416c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 110516c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 110616c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 110716c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 110816c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 110916c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 111016c8d5e7SWolfgang Denk 111116c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 111216c8d5e7SWolfgang Denk Define this string as the name of your company for 111316c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 111416c8d5e7SWolfgang Denk 111516c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 111616c8d5e7SWolfgang Denk Define this string as the name of your product 111716c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 111816c8d5e7SWolfgang Denk 111916c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 112016c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 112116c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 112216c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 112316c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 112416c8d5e7SWolfgang Denk 112516c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 112616c8d5e7SWolfgang Denk Define this as the unique Product ID 112716c8d5e7SWolfgang Denk for your device 112816c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1129c609719bSwdenk 1130c609719bSwdenk 1131c609719bSwdenk- MMC Support: 1132c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1133c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1134c609719bSwdenk accessed from the boot prompt by mapping the device 1135c609719bSwdenk to physical memory similar to flash. Command line is 1136602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1137602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1138c609719bSwdenk 1139afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1140afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1141afb35666SYoshihiro Shimoda 1142afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1143afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1144afb35666SYoshihiro Shimoda 1145afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1146afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1147afb35666SYoshihiro Shimoda 11486705d81eSwdenk- Journaling Flash filesystem support: 11496705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 11506705d81eSwdenk CONFIG_JFFS2_NAND_DEV 11516705d81eSwdenk Define these for a default partition on a NAND device 11526705d81eSwdenk 11536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 11546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 11556705d81eSwdenk Define these for a default partition on a NOR device 11566705d81eSwdenk 11576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 11586705d81eSwdenk Define this to create an own partition. You have to provide a 11596705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 11606705d81eSwdenk 11616705d81eSwdenk If you define only one JFFS2 partition you may also want to 11626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 11636705d81eSwdenk to disable the command chpart. This is the default when you 11646705d81eSwdenk have not defined a custom partition 11656705d81eSwdenk 1166c609719bSwdenk- Keyboard Support: 1167c609719bSwdenk CONFIG_ISA_KEYBOARD 1168c609719bSwdenk 1169c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1170c609719bSwdenk support 1171c609719bSwdenk 1172c609719bSwdenk CONFIG_I8042_KBD 1173c609719bSwdenk Standard PC keyboard driver with US (is default) and 1174c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1175c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1176c609719bSwdenk for cfb_console. Supports cursor blinking. 1177c609719bSwdenk 1178c609719bSwdenk- Video support: 1179c609719bSwdenk CONFIG_VIDEO 1180c609719bSwdenk 1181c609719bSwdenk Define this to enable video support (for output to 1182c609719bSwdenk video). 1183c609719bSwdenk 1184c609719bSwdenk CONFIG_VIDEO_CT69000 1185c609719bSwdenk 1186c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1187c609719bSwdenk 1188c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1189eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1190eeb1b77bSwdenk video output is selected via environment 'videoout' 1191eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1192eeb1b77bSwdenk assumed. 1193c609719bSwdenk 1194eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 119511ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1196eeb1b77bSwdenk are possible: 1197eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1198eeb1b77bSwdenk Following standard modes are supported (* is default): 1199eeb1b77bSwdenk 1200eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1201eeb1b77bSwdenk -------------+--------------------------------------------- 1202eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1203eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1204eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1205eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1206eeb1b77bSwdenk -------------+--------------------------------------------- 1207c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1208c609719bSwdenk 1209eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 12107817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1211eeb1b77bSwdenk 1212eeb1b77bSwdenk 1213a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1214a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1215a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1216a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1217a6c7ad2fSwdenk 12187d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 12197d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 12207d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 12217d3053fbSTimur Tabi support, and should also define these other macros: 12227d3053fbSTimur Tabi 12237d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 12247d3053fbSTimur Tabi CONFIG_VIDEO 12257d3053fbSTimur Tabi CONFIG_CMD_BMP 12267d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 12277d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 12287d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 12297d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 12307d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 12317d3053fbSTimur Tabi 1232ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1233ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1234ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1235ba8e76bdSTimur Tabi description of this variable. 12367d3053fbSTimur Tabi 1237682011ffSwdenk- Keyboard Support: 1238682011ffSwdenk CONFIG_KEYBOARD 1239682011ffSwdenk 1240682011ffSwdenk Define this to enable a custom keyboard support. 1241682011ffSwdenk This simply calls drv_keyboard_init() which must be 1242682011ffSwdenk defined in your board-specific files. 1243682011ffSwdenk The only board using this so far is RBC823. 1244a6c7ad2fSwdenk 1245c609719bSwdenk- LCD Support: CONFIG_LCD 1246c609719bSwdenk 1247c609719bSwdenk Define this to enable LCD support (for output to LCD 1248c609719bSwdenk display); also select one of the supported displays 1249c609719bSwdenk by defining one of these: 1250c609719bSwdenk 125139cf4804SStelian Pop CONFIG_ATMEL_LCD: 125239cf4804SStelian Pop 125339cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 125439cf4804SStelian Pop 1255fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1256c609719bSwdenk 1257fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1258c609719bSwdenk 1259fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1260c609719bSwdenk 1261fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1262fd3103bbSwdenk Active, color, single scan. 1263fd3103bbSwdenk 1264fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1265fd3103bbSwdenk 1266fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1267c609719bSwdenk Active, color, single scan. 1268c609719bSwdenk 1269c609719bSwdenk CONFIG_SHARP_16x9 1270c609719bSwdenk 1271c609719bSwdenk Sharp 320x240. Active, color, single scan. 1272c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1273c609719bSwdenk 1274c609719bSwdenk CONFIG_SHARP_LQ64D341 1275c609719bSwdenk 1276c609719bSwdenk Sharp LQ64D341 display, 640x480. 1277c609719bSwdenk Active, color, single scan. 1278c609719bSwdenk 1279c609719bSwdenk CONFIG_HLD1045 1280c609719bSwdenk 1281c609719bSwdenk HLD1045 display, 640x480. 1282c609719bSwdenk Active, color, single scan. 1283c609719bSwdenk 1284c609719bSwdenk CONFIG_OPTREX_BW 1285c609719bSwdenk 1286c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1287c609719bSwdenk or 1288c609719bSwdenk Hitachi LMG6912RPFC-00T 1289c609719bSwdenk or 1290c609719bSwdenk Hitachi SP14Q002 1291c609719bSwdenk 1292c609719bSwdenk 320x240. Black & white. 1293c609719bSwdenk 1294c609719bSwdenk Normally display is black on white background; define 12956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1296c609719bSwdenk 12977152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1298d791b1dcSwdenk 1299d791b1dcSwdenk If this option is set, the environment is checked for 1300d791b1dcSwdenk a variable "splashimage". If found, the usual display 1301d791b1dcSwdenk of logo, copyright and system information on the LCD 1302e94d2cd9Swdenk is suppressed and the BMP image at the address 1303d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1304d791b1dcSwdenk console is redirected to the "nulldev", too. This 1305d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1306d791b1dcSwdenk loaded very quickly after power-on. 1307d791b1dcSwdenk 13081ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 13091ca298ceSMatthias Weisser 13101ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 13111ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 13121ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 13131ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 13141ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 13151ca298ceSMatthias Weisser specify 'm' for centering the image. 13161ca298ceSMatthias Weisser 13171ca298ceSMatthias Weisser Example: 13181ca298ceSMatthias Weisser setenv splashpos m,m 13191ca298ceSMatthias Weisser => image at center of screen 13201ca298ceSMatthias Weisser 13211ca298ceSMatthias Weisser setenv splashpos 30,20 13221ca298ceSMatthias Weisser => image at x = 30 and y = 20 13231ca298ceSMatthias Weisser 13241ca298ceSMatthias Weisser setenv splashpos -10,m 13251ca298ceSMatthias Weisser => vertically centered image 13261ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 13271ca298ceSMatthias Weisser 132898f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 132998f4a3dfSStefan Roese 133098f4a3dfSStefan Roese If this option is set, additionally to standard BMP 133198f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 133298f4a3dfSStefan Roese splashscreen support or the bmp command. 133398f4a3dfSStefan Roese 1334d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1335d5011762SAnatolij Gustschin 1336d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1337d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1338d5011762SAnatolij Gustschin bmp command. 1339d5011762SAnatolij Gustschin 1340c29fdfc1Swdenk- Compression support: 1341c29fdfc1Swdenk CONFIG_BZIP2 1342c29fdfc1Swdenk 1343c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1344c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1345c29fdfc1Swdenk compressed images are supported. 1346c29fdfc1Swdenk 1347c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 13486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1349c29fdfc1Swdenk be at least 4MB. 1350d791b1dcSwdenk 1351fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1352fc9c1727SLuigi 'Comio' Mantellini 1353fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1354fc9c1727SLuigi 'Comio' Mantellini images is included. 1355fc9c1727SLuigi 'Comio' Mantellini 1356fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1357fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1358fc9c1727SLuigi 'Comio' Mantellini formula: 1359fc9c1727SLuigi 'Comio' Mantellini 1360fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1361fc9c1727SLuigi 'Comio' Mantellini 1362fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1363fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1364fc9c1727SLuigi 'Comio' Mantellini 1365fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1366fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1367fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1368fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1369fc9c1727SLuigi 'Comio' Mantellini 1370fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1371fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 13726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1373fc9c1727SLuigi 'Comio' Mantellini 137417ea1177Swdenk- MII/PHY support: 137517ea1177Swdenk CONFIG_PHY_ADDR 137617ea1177Swdenk 137717ea1177Swdenk The address of PHY on MII bus. 137817ea1177Swdenk 137917ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 138017ea1177Swdenk 138117ea1177Swdenk The clock frequency of the MII bus 138217ea1177Swdenk 138317ea1177Swdenk CONFIG_PHY_GIGE 138417ea1177Swdenk 138517ea1177Swdenk If this option is set, support for speed/duplex 138611ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 138717ea1177Swdenk 138817ea1177Swdenk CONFIG_PHY_RESET_DELAY 138917ea1177Swdenk 139017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 139117ea1177Swdenk reset before any MII register access is possible. 139217ea1177Swdenk For such PHY, set this option to the usec delay 139317ea1177Swdenk required. (minimum 300usec for LXT971A) 139417ea1177Swdenk 139517ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 139617ea1177Swdenk 139717ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 139817ea1177Swdenk command issued before MII status register can be read 139917ea1177Swdenk 1400c609719bSwdenk- Ethernet address: 1401c609719bSwdenk CONFIG_ETHADDR 1402c68a05feSrichardretanubun CONFIG_ETH1ADDR 1403c609719bSwdenk CONFIG_ETH2ADDR 1404c609719bSwdenk CONFIG_ETH3ADDR 1405c68a05feSrichardretanubun CONFIG_ETH4ADDR 1406c68a05feSrichardretanubun CONFIG_ETH5ADDR 1407c609719bSwdenk 140811ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 140911ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1410c609719bSwdenk is not determined automatically. 1411c609719bSwdenk 1412c609719bSwdenk- IP address: 1413c609719bSwdenk CONFIG_IPADDR 1414c609719bSwdenk 1415c609719bSwdenk Define a default value for the IP address to use for 141611ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1417c609719bSwdenk determined through e.g. bootp. 1418c609719bSwdenk 1419c609719bSwdenk- Server IP address: 1420c609719bSwdenk CONFIG_SERVERIP 1421c609719bSwdenk 1422c609719bSwdenk Defines a default value for the IP address of a TFTP 1423c609719bSwdenk server to contact when using the "tftboot" command. 1424c609719bSwdenk 142597cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 142697cfe861SRobin Getz 142797cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 142897cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 142997cfe861SRobin Getz 143053a5c424SDavid Updegraff- Multicast TFTP Mode: 143153a5c424SDavid Updegraff CONFIG_MCAST_TFTP 143253a5c424SDavid Updegraff 143353a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 143453a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 143511ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 143653a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 143753a5c424SDavid Updegraff multicast group. 143853a5c424SDavid Updegraff 1439c609719bSwdenk- BOOTP Recovery Mode: 1440c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1441c609719bSwdenk 1442c609719bSwdenk If you have many targets in a network that try to 1443c609719bSwdenk boot using BOOTP, you may want to avoid that all 1444c609719bSwdenk systems send out BOOTP requests at precisely the same 1445c609719bSwdenk moment (which would happen for instance at recovery 1446c609719bSwdenk from a power failure, when all systems will try to 1447c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1448c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1449c609719bSwdenk inserted before sending out BOOTP requests. The 14506c33c785SWolfgang Denk following delays are inserted then: 1451c609719bSwdenk 1452c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1453c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1454c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1455c609719bSwdenk 4th and following 1456c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1457c609719bSwdenk 1458fe389a82Sstroese- DHCP Advanced Options: 14591fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 14601fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1461fe389a82Sstroese 14621fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 14631fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 14641fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 14651fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 14661fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 14671fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 14681fe80d79SJon Loeliger CONFIG_BOOTP_DNS 14691fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 14701fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 14711fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 14721fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 14731fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1474fe389a82Sstroese 14755d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 14765d110f0aSWilson Callan environment variable, not the BOOTP server. 1477fe389a82Sstroese 1478fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1479fe389a82Sstroese serverip from a DHCP server, it is possible that more 1480fe389a82Sstroese than one DNS serverip is offered to the client. 1481fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1482fe389a82Sstroese serverip will be stored in the additional environment 1483fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1484fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 14851fe80d79SJon Loeliger is defined. 1486fe389a82Sstroese 1487fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1488fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1489fe389a82Sstroese need the hostname of the DHCP requester. 14905d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 14911fe80d79SJon Loeliger of the "hostname" environment variable is passed as 14921fe80d79SJon Loeliger option 12 to the DHCP server. 1493fe389a82Sstroese 1494d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1495d9a2f416SAras Vaichas 1496d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1497d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1498d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1499d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1500d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1501d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1502d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1503d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1504d9a2f416SAras Vaichas that one of the retries will be successful but note that 1505d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1506d9a2f416SAras Vaichas this delay. 1507d9a2f416SAras Vaichas 1508a3d991bdSwdenk - CDP Options: 1509a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1510a3d991bdSwdenk 1511a3d991bdSwdenk The device id used in CDP trigger frames. 1512a3d991bdSwdenk 1513a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1514a3d991bdSwdenk 1515a3d991bdSwdenk A two character string which is prefixed to the MAC address 1516a3d991bdSwdenk of the device. 1517a3d991bdSwdenk 1518a3d991bdSwdenk CONFIG_CDP_PORT_ID 1519a3d991bdSwdenk 1520a3d991bdSwdenk A printf format string which contains the ascii name of 1521a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 152211ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1523a3d991bdSwdenk 1524a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1525a3d991bdSwdenk 1526a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1527a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1528a3d991bdSwdenk 1529a3d991bdSwdenk CONFIG_CDP_VERSION 1530a3d991bdSwdenk 1531a3d991bdSwdenk An ascii string containing the version of the software. 1532a3d991bdSwdenk 1533a3d991bdSwdenk CONFIG_CDP_PLATFORM 1534a3d991bdSwdenk 1535a3d991bdSwdenk An ascii string containing the name of the platform. 1536a3d991bdSwdenk 1537a3d991bdSwdenk CONFIG_CDP_TRIGGER 1538a3d991bdSwdenk 1539a3d991bdSwdenk A 32bit integer sent on the trigger. 1540a3d991bdSwdenk 1541a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1542a3d991bdSwdenk 1543a3d991bdSwdenk A 16bit integer containing the power consumption of the 1544a3d991bdSwdenk device in .1 of milliwatts. 1545a3d991bdSwdenk 1546a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1547a3d991bdSwdenk 1548a3d991bdSwdenk A byte containing the id of the VLAN. 1549a3d991bdSwdenk 1550c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1551c609719bSwdenk 1552c609719bSwdenk Several configurations allow to display the current 1553c609719bSwdenk status using a LED. For instance, the LED will blink 1554c609719bSwdenk fast while running U-Boot code, stop blinking as 1555c609719bSwdenk soon as a reply to a BOOTP request was received, and 1556c609719bSwdenk start blinking slow once the Linux kernel is running 1557c609719bSwdenk (supported by a status LED driver in the Linux 1558c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1559c609719bSwdenk feature in U-Boot. 1560c609719bSwdenk 1561c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1562c609719bSwdenk 1563c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1564c609719bSwdenk on those systems that support this (optional) 1565c609719bSwdenk feature, like the TQM8xxL modules. 1566c609719bSwdenk 1567c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1568c609719bSwdenk 1569b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1570b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 157111ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1572c609719bSwdenk 1573b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1574602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1575b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1576b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1577c609719bSwdenk command line interface. 1578c609719bSwdenk 1579bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1580c609719bSwdenk 1581b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1582b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1583b37c7e5eSwdenk support for I2C. 1584c609719bSwdenk 1585b37c7e5eSwdenk There are several other quantities that must also be 1586b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1587c609719bSwdenk 15886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1589b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 15906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 159111ccc33fSMarcel Ziswiler the CPU's i2c node address). 1592c609719bSwdenk 15938d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1594a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 15958d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 15968d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 15978d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1598b37c7e5eSwdenk 15995da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 16005da71efaSEric Millbrandt 16015da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 16025da71efaSEric Millbrandt chips might think that the current transfer is still 16035da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 16045da71efaSEric Millbrandt commands until the slave device responds. 16055da71efaSEric Millbrandt 1606b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1607b37c7e5eSwdenk 1608b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1609b37c7e5eSwdenk then the following macros need to be defined (examples are 1610b37c7e5eSwdenk from include/configs/lwmon.h): 1611c609719bSwdenk 1612c609719bSwdenk I2C_INIT 1613c609719bSwdenk 1614b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1615c609719bSwdenk controller or configure ports. 1616c609719bSwdenk 1617b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1618b37c7e5eSwdenk 1619c609719bSwdenk I2C_PORT 1620c609719bSwdenk 1621c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1622c609719bSwdenk assumes both bits are on the same port). Valid values 1623c609719bSwdenk are 0..3 for ports A..D. 1624c609719bSwdenk 1625c609719bSwdenk I2C_ACTIVE 1626c609719bSwdenk 1627c609719bSwdenk The code necessary to make the I2C data line active 1628c609719bSwdenk (driven). If the data line is open collector, this 1629c609719bSwdenk define can be null. 1630c609719bSwdenk 1631b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1632b37c7e5eSwdenk 1633c609719bSwdenk I2C_TRISTATE 1634c609719bSwdenk 1635c609719bSwdenk The code necessary to make the I2C data line tri-stated 1636c609719bSwdenk (inactive). If the data line is open collector, this 1637c609719bSwdenk define can be null. 1638c609719bSwdenk 1639b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1640b37c7e5eSwdenk 1641c609719bSwdenk I2C_READ 1642c609719bSwdenk 1643c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1644c609719bSwdenk FALSE if it is low. 1645c609719bSwdenk 1646b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1647b37c7e5eSwdenk 1648c609719bSwdenk I2C_SDA(bit) 1649c609719bSwdenk 1650c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1651c609719bSwdenk is FALSE, it clears it (low). 1652c609719bSwdenk 1653b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1654b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1655b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1656b37c7e5eSwdenk 1657c609719bSwdenk I2C_SCL(bit) 1658c609719bSwdenk 1659c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1660c609719bSwdenk is FALSE, it clears it (low). 1661c609719bSwdenk 1662b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1663b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1664b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1665b37c7e5eSwdenk 1666c609719bSwdenk I2C_DELAY 1667c609719bSwdenk 1668c609719bSwdenk This delay is invoked four times per clock cycle so this 1669c609719bSwdenk controls the rate of data transfer. The data rate thus 1670b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1671b37c7e5eSwdenk like: 1672b37c7e5eSwdenk 1673b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1674c609719bSwdenk 1675793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1676793b5726SMike Frysinger 1677793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1678793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1679793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1680793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1681793b5726SMike Frysinger 1682793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1683793b5726SMike Frysinger the generic GPIO functions. 1684793b5726SMike Frysinger 16856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 168647cd00faSwdenk 168747cd00faSwdenk When a board is reset during an i2c bus transfer 168847cd00faSwdenk chips might think that the current transfer is still 168947cd00faSwdenk in progress. On some boards it is possible to access 169047cd00faSwdenk the i2c SCLK line directly, either by using the 169147cd00faSwdenk processor pin as a GPIO or by having a second pin 169247cd00faSwdenk connected to the bus. If this option is defined a 169347cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 169447cd00faSwdenk is run early in the boot sequence. 169547cd00faSwdenk 169626a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 169726a33504SRichard Retanubun 169826a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 169926a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 170026a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 170126a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 170226a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 170326a33504SRichard Retanubun controller provide such a method. It is called at the end of 170426a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 170526a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 170626a33504SRichard Retanubun 170717ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 170817ea1177Swdenk 170917ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 171017ea1177Swdenk in u-boot bd_info structure based on u-boot environment 171117ea1177Swdenk variable "i2cfast". (see also i2cfast) 171217ea1177Swdenk 1713bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1714bb99ad6dSBen Warren 1715bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1716bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1717bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1718bb99ad6dSBen Warren Note that bus numbering is zero-based. 1719bb99ad6dSBen Warren 17206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1721bb99ad6dSBen Warren 1722bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 17230f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 17240f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 17250f89c54bSPeter Tyser a 1D array of device addresses 1726bb99ad6dSBen Warren 1727bb99ad6dSBen Warren e.g. 1728bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 17296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1730bb99ad6dSBen Warren 1731bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1732bb99ad6dSBen Warren 1733bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 17346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1735bb99ad6dSBen Warren 1736bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1737bb99ad6dSBen Warren 17386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1739be5e6181STimur Tabi 1740be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1741be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1742be5e6181STimur Tabi 17436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 17440dc018ecSStefan Roese 17450dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 17460dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 17470dc018ecSStefan Roese 17486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 17490dc018ecSStefan Roese 17500dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 17510dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 17520dc018ecSStefan Roese 17536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 17549ebbb54fSVictor Gallardo 17559ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 17569ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 17579ebbb54fSVictor Gallardo specified DTT device. 17589ebbb54fSVictor Gallardo 1759be5e6181STimur Tabi CONFIG_FSL_I2C 1760be5e6181STimur Tabi 1761be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 17627817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1763be5e6181STimur Tabi 176467b23a32SHeiko Schocher CONFIG_I2C_MUX 176567b23a32SHeiko Schocher 176667b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 176767b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 176867b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 176967b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 177067b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 177167b23a32SHeiko Schocher the muxes to activate this new "bus". 177267b23a32SHeiko Schocher 177367b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 177467b23a32SHeiko Schocher feature! 177567b23a32SHeiko Schocher 177667b23a32SHeiko Schocher Example: 177767b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 177867b23a32SHeiko Schocher The First mux with address 70 and channel 6 177967b23a32SHeiko Schocher The Second mux with address 71 and channel 4 178067b23a32SHeiko Schocher 178167b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 178267b23a32SHeiko Schocher 178367b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 178467b23a32SHeiko Schocher of I2C Busses with muxes: 178567b23a32SHeiko Schocher 178667b23a32SHeiko Schocher => i2c bus 178767b23a32SHeiko Schocher Busses reached over muxes: 178867b23a32SHeiko Schocher Bus ID: 2 178967b23a32SHeiko Schocher reached over Mux(es): 179067b23a32SHeiko Schocher pca9544a@70 ch: 4 179167b23a32SHeiko Schocher Bus ID: 3 179267b23a32SHeiko Schocher reached over Mux(es): 179367b23a32SHeiko Schocher pca9544a@70 ch: 6 179467b23a32SHeiko Schocher pca9544a@71 ch: 4 179567b23a32SHeiko Schocher => 179667b23a32SHeiko Schocher 179767b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1798f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1799f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 180067b23a32SHeiko Schocher the channel 4. 180167b23a32SHeiko Schocher 180267b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1803f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 180467b23a32SHeiko Schocher the 2 muxes. 180567b23a32SHeiko Schocher 180667b23a32SHeiko Schocher This option is actually implemented for the bitbanging 180767b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 180867b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 180967b23a32SHeiko Schocher to add this option to other architectures. 181067b23a32SHeiko Schocher 18112ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 18122ac6985aSAndrew Dyer 18132ac6985aSAndrew Dyer defining this will force the i2c_read() function in 18142ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 18152ac6985aSAndrew Dyer between writing the address pointer and reading the 18162ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 18172ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 18182ac6985aSAndrew Dyer devices can use either method, but some require one or 18192ac6985aSAndrew Dyer the other. 1820be5e6181STimur Tabi 1821c609719bSwdenk- SPI Support: CONFIG_SPI 1822c609719bSwdenk 1823c609719bSwdenk Enables SPI driver (so far only tested with 1824c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1825c609719bSwdenk D/As on the SACSng board) 1826c609719bSwdenk 18276639562eSYoshihiro Shimoda CONFIG_SH_SPI 18286639562eSYoshihiro Shimoda 18296639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 18306639562eSYoshihiro Shimoda only SH7757 is supported. 18316639562eSYoshihiro Shimoda 1832c609719bSwdenk CONFIG_SPI_X 1833c609719bSwdenk 1834c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1835c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1836c609719bSwdenk 1837c609719bSwdenk CONFIG_SOFT_SPI 1838c609719bSwdenk 1839c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1840c609719bSwdenk using hardware support. This is a general purpose 1841c609719bSwdenk driver that only requires three general I/O port pins 1842c609719bSwdenk (two outputs, one input) to function. If this is 1843c609719bSwdenk defined, the board configuration must define several 1844c609719bSwdenk SPI configuration items (port pins to use, etc). For 1845c609719bSwdenk an example, see include/configs/sacsng.h. 1846c609719bSwdenk 184704a9e118SBen Warren CONFIG_HARD_SPI 184804a9e118SBen Warren 184904a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 185004a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 185104a9e118SBen Warren must define a list of chip-select function pointers. 185204a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 185304a9e118SBen Warren example, see include/configs/mpc8349emds.h. 185404a9e118SBen Warren 185538254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 185638254f45SGuennadi Liakhovetski 185738254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 185838254f45SGuennadi Liakhovetski SoCs. Currently only i.MX31 is supported. 185938254f45SGuennadi Liakhovetski 18600133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 18610133502eSMatthias Fuchs 18620133502eSMatthias Fuchs Enables FPGA subsystem. 18630133502eSMatthias Fuchs 18640133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 18650133502eSMatthias Fuchs 18660133502eSMatthias Fuchs Enables support for specific chip vendors. 18670133502eSMatthias Fuchs (ALTERA, XILINX) 18680133502eSMatthias Fuchs 18690133502eSMatthias Fuchs CONFIG_FPGA_<family> 18700133502eSMatthias Fuchs 18710133502eSMatthias Fuchs Enables support for FPGA family. 18720133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 18730133502eSMatthias Fuchs 18740133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1875c609719bSwdenk 1876c609719bSwdenk Specify the number of FPGA devices to support. 1877c609719bSwdenk 18786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1879c609719bSwdenk 1880c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1881c609719bSwdenk 18826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1883c609719bSwdenk 1884c609719bSwdenk Enable checks on FPGA configuration interface busy 1885c609719bSwdenk status by the configuration function. This option 1886c609719bSwdenk will require a board or device specific function to 1887c609719bSwdenk be written. 1888c609719bSwdenk 1889c609719bSwdenk CONFIG_FPGA_DELAY 1890c609719bSwdenk 1891c609719bSwdenk If defined, a function that provides delays in the FPGA 1892c609719bSwdenk configuration driver. 1893c609719bSwdenk 18946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 1895c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1896c609719bSwdenk 18976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 1898c609719bSwdenk 1899c609719bSwdenk Check for configuration errors during FPGA bitfile 1900c609719bSwdenk loading. For example, abort during Virtex II 1901c609719bSwdenk configuration if the INIT_B line goes low (which 1902c609719bSwdenk indicated a CRC error). 1903c609719bSwdenk 19046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 1905c609719bSwdenk 1906c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1907c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1908c609719bSwdenk FPGA configuration sequence. The default time is 500 190911ccc33fSMarcel Ziswiler ms. 1910c609719bSwdenk 19116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 1912c609719bSwdenk 1913c609719bSwdenk Maximum time to wait for BUSY to deassert during 191411ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 1915c609719bSwdenk 19166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 1917c609719bSwdenk 1918c609719bSwdenk Time to wait after FPGA configuration. The default is 191911ccc33fSMarcel Ziswiler 200 ms. 1920c609719bSwdenk 1921c609719bSwdenk- Configuration Management: 1922c609719bSwdenk CONFIG_IDENT_STRING 1923c609719bSwdenk 1924c609719bSwdenk If defined, this string will be added to the U-Boot 1925c609719bSwdenk version information (U_BOOT_VERSION) 1926c609719bSwdenk 1927c609719bSwdenk- Vendor Parameter Protection: 1928c609719bSwdenk 1929c609719bSwdenk U-Boot considers the values of the environment 1930c609719bSwdenk variables "serial#" (Board Serial Number) and 19317152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1932c609719bSwdenk are set once by the board vendor / manufacturer, and 1933c609719bSwdenk protects these variables from casual modification by 1934c609719bSwdenk the user. Once set, these variables are read-only, 1935c609719bSwdenk and write or delete attempts are rejected. You can 193611ccc33fSMarcel Ziswiler change this behaviour: 1937c609719bSwdenk 1938c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1939c609719bSwdenk file, the write protection for vendor parameters is 194047cd00faSwdenk completely disabled. Anybody can change or delete 1941c609719bSwdenk these parameters. 1942c609719bSwdenk 1943c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1944c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 194511ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 1946c609719bSwdenk which can be changed exactly ONCE by the user. [The 1947c609719bSwdenk serial# is unaffected by this, i. e. it remains 1948c609719bSwdenk read-only.] 1949c609719bSwdenk 1950c609719bSwdenk- Protected RAM: 1951c609719bSwdenk CONFIG_PRAM 1952c609719bSwdenk 1953c609719bSwdenk Define this variable to enable the reservation of 1954c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1955c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1956c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1957c609719bSwdenk this default value by defining an environment 1958c609719bSwdenk variable "pram" to the number of kB you want to 1959c609719bSwdenk reserve. Note that the board info structure will 1960c609719bSwdenk still show the full amount of RAM. If pRAM is 1961c609719bSwdenk reserved, a new environment variable "mem" will 1962c609719bSwdenk automatically be defined to hold the amount of 1963c609719bSwdenk remaining RAM in a form that can be passed as boot 1964c609719bSwdenk argument to Linux, for instance like that: 1965c609719bSwdenk 1966fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1967c609719bSwdenk saveenv 1968c609719bSwdenk 1969c609719bSwdenk This way you can tell Linux not to use this memory, 1970c609719bSwdenk either, which results in a memory region that will 1971c609719bSwdenk not be affected by reboots. 1972c609719bSwdenk 1973c609719bSwdenk *WARNING* If your board configuration uses automatic 1974c609719bSwdenk detection of the RAM size, you must make sure that 1975c609719bSwdenk this memory test is non-destructive. So far, the 1976c609719bSwdenk following board configurations are known to be 1977c609719bSwdenk "pRAM-clean": 1978c609719bSwdenk 1979c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1980c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1981544d97e9SWolfgang Denk FLAGADM, TQM8260 1982c609719bSwdenk 1983c609719bSwdenk- Error Recovery: 1984c609719bSwdenk CONFIG_PANIC_HANG 1985c609719bSwdenk 1986c609719bSwdenk Define this variable to stop the system in case of a 1987c609719bSwdenk fatal error, so that you have to reset it manually. 1988c609719bSwdenk This is probably NOT a good idea for an embedded 198911ccc33fSMarcel Ziswiler system where you want the system to reboot 1990c609719bSwdenk automatically as fast as possible, but it may be 1991c609719bSwdenk useful during development since you can try to debug 1992c609719bSwdenk the conditions that lead to the situation. 1993c609719bSwdenk 1994c609719bSwdenk CONFIG_NET_RETRY_COUNT 1995c609719bSwdenk 1996c609719bSwdenk This variable defines the number of retries for 1997c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1998c609719bSwdenk before giving up the operation. If not defined, a 1999c609719bSwdenk default value of 5 is used. 2000c609719bSwdenk 200140cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 200240cb90eeSGuennadi Liakhovetski 200340cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 200440cb90eeSGuennadi Liakhovetski 2005c609719bSwdenk- Command Interpreter: 20068078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 200704a85b3bSwdenk 200804a85b3bSwdenk Enable auto completion of commands using TAB. 200904a85b3bSwdenk 20108078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 20118078f1a5SWolfgang Denk for the "hush" shell. 20128078f1a5SWolfgang Denk 20138078f1a5SWolfgang Denk 20146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2015c609719bSwdenk 2016c609719bSwdenk Define this variable to enable the "hush" shell (from 2017c609719bSwdenk Busybox) as command line interpreter, thus enabling 2018c609719bSwdenk powerful command line syntax like 2019c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2020c609719bSwdenk constructs ("shell scripts"). 2021c609719bSwdenk 2022c609719bSwdenk If undefined, you get the old, much simpler behaviour 2023c609719bSwdenk with a somewhat smaller memory footprint. 2024c609719bSwdenk 2025c609719bSwdenk 20266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2027c609719bSwdenk 2028c609719bSwdenk This defines the secondary prompt string, which is 2029c609719bSwdenk printed when the command interpreter needs more input 2030c609719bSwdenk to complete a command. Usually "> ". 2031c609719bSwdenk 2032c609719bSwdenk Note: 2033c609719bSwdenk 2034c609719bSwdenk In the current implementation, the local variables 2035c609719bSwdenk space and global environment variables space are 2036c609719bSwdenk separated. Local variables are those you define by 20373b57fe0aSwdenk simply typing `name=value'. To access a local 2038c609719bSwdenk variable later on, you have write `$name' or 20393b57fe0aSwdenk `${name}'; to execute the contents of a variable 20403b57fe0aSwdenk directly type `$name' at the command prompt. 2041c609719bSwdenk 2042c609719bSwdenk Global environment variables are those you use 2043c609719bSwdenk setenv/printenv to work with. To run a command stored 2044c609719bSwdenk in such a variable, you need to use the run command, 2045c609719bSwdenk and you must not use the '$' sign to access them. 2046c609719bSwdenk 2047c609719bSwdenk To store commands and special characters in a 2048c609719bSwdenk variable, please use double quotation marks 2049c609719bSwdenk surrounding the whole text of the variable, instead 2050c609719bSwdenk of the backslashes before semicolons and special 2051c609719bSwdenk symbols. 2052c609719bSwdenk 2053aa0c71acSWolfgang Denk- Commandline Editing and History: 2054aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2055aa0c71acSWolfgang Denk 205611ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2057aa0c71acSWolfgang Denk commandline input operations 2058aa0c71acSWolfgang Denk 2059a8c7c708Swdenk- Default Environment: 2060c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2061c609719bSwdenk 2062c609719bSwdenk Define this to contain any number of null terminated 2063c609719bSwdenk strings (variable = value pairs) that will be part of 20647152b1d0Swdenk the default environment compiled into the boot image. 20652262cfeeSwdenk 2066c609719bSwdenk For example, place something like this in your 2067c609719bSwdenk board's config file: 2068c609719bSwdenk 2069c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2070c609719bSwdenk "myvar1=value1\0" \ 2071c609719bSwdenk "myvar2=value2\0" 2072c609719bSwdenk 2073c609719bSwdenk Warning: This method is based on knowledge about the 2074c609719bSwdenk internal format how the environment is stored by the 20752262cfeeSwdenk U-Boot code. This is NOT an official, exported 2076c609719bSwdenk interface! Although it is unlikely that this format 20777152b1d0Swdenk will change soon, there is no guarantee either. 2078c609719bSwdenk You better know what you are doing here. 2079c609719bSwdenk 2080c609719bSwdenk Note: overly (ab)use of the default environment is 2081c609719bSwdenk discouraged. Make sure to check other ways to preset 208274de7aefSWolfgang Denk the environment like the "source" command or the 2083c609719bSwdenk boot command first. 2084c609719bSwdenk 2085a8c7c708Swdenk- DataFlash Support: 20862abbe075Swdenk CONFIG_HAS_DATAFLASH 20872abbe075Swdenk 20882abbe075Swdenk Defining this option enables DataFlash features and 20892abbe075Swdenk allows to read/write in Dataflash via the standard 20902abbe075Swdenk commands cp, md... 20912abbe075Swdenk 20923f85ce27Swdenk- SystemACE Support: 20933f85ce27Swdenk CONFIG_SYSTEMACE 20943f85ce27Swdenk 20953f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 20963f85ce27Swdenk chips attached via some sort of local bus. The address 209711ccc33fSMarcel Ziswiler of the chip must also be defined in the 20986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 20993f85ce27Swdenk 21003f85ce27Swdenk #define CONFIG_SYSTEMACE 21016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 21023f85ce27Swdenk 21033f85ce27Swdenk When SystemACE support is added, the "ace" device type 21043f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 21053f85ce27Swdenk 2106ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2107ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2108ecb0ccd9SWolfgang Denk 210928cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2110ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 211128cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2112ecb0ccd9SWolfgang Denk number generator is used. 2113ecb0ccd9SWolfgang Denk 211428cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 211528cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 211628cb9375SWolfgang Denk defined, the normal port 69 is used. 211728cb9375SWolfgang Denk 211828cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2119ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2120ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2121ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2122ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2123ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2124ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2125ecb0ccd9SWolfgang Denk 2126a8c7c708Swdenk- Show boot progress: 2127c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2128c609719bSwdenk 2129c609719bSwdenk Defining this option allows to add some board- 2130c609719bSwdenk specific code (calling a user-provided function 2131c609719bSwdenk "show_boot_progress(int)") that enables you to show 2132c609719bSwdenk the system's boot progress on some display (for 2133c609719bSwdenk example, some LED's) on your board. At the moment, 2134c609719bSwdenk the following checkpoints are implemented: 2135c609719bSwdenk 21361372cce2SMarian BalakowiczLegacy uImage format: 21371372cce2SMarian Balakowicz 2138c609719bSwdenk Arg Where When 2139c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2140c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2141c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2142c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2143c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2144c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2145c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2146c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2147c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 21481372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2149c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2150c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2151c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2152c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 21531372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2154c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 21551372cce2SMarian Balakowicz 21561372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 21571372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 21581372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 21591372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 21601372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 21611372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 21621372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 216311ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 21641372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 21651372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 21661372cce2SMarian Balakowicz 2167ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2168c609719bSwdenk 2169a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 217063e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 217163e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 217263e73c9aSwdenk 2173566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2174566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2175566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2176566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2177566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2178566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2179566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2180566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2181566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2182566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2183566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2184566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2185566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2186566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2187566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2188566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2189566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2190566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2191566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2192566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2193566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2194566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2195566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2196566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2197566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2198566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2199566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2200566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2201566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2202566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2203566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2204566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2205566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2206566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2207566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2208566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2209566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2210566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2211566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2212566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2213566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2214566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2215566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2216566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2217566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2218566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2219566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2220c609719bSwdenk 2221566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2222c609719bSwdenk 2223566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2224566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2225566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2226206c60cbSwdenk 2227566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2228566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 222911ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2230566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2231566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2232566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 223374de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 223474de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2235566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2236c609719bSwdenk 22371372cce2SMarian BalakowiczFIT uImage format: 22381372cce2SMarian Balakowicz 22391372cce2SMarian Balakowicz Arg Where When 22401372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 22411372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 22421372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 22431372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 22441372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 22451372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2246f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 22471372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 22481372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 22491372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 22501372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 22511372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 225211ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 225311ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 22541372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 22551372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 22561372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 22571372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 22581372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 22591372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 22601372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 22611372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 22621372cce2SMarian Balakowicz 22631372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 22641372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 22651372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 226611ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 22671372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 22681372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 22691372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 22701372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 22711372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 22721372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 22731372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 22741372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 22751372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 22761372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 22771372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 22781372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 22791372cce2SMarian Balakowicz 228011ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 22811372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 22821372cce2SMarian Balakowicz 228311ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 22841372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 22851372cce2SMarian Balakowicz 228611ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 22871372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 22881372cce2SMarian Balakowicz 22894cf2609bSWolfgang Denk- Standalone program support: 22904cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 22914cf2609bSWolfgang Denk 22926feff899SWolfgang Denk This option defines a board specific value for the 22936feff899SWolfgang Denk address where standalone program gets loaded, thus 22946feff899SWolfgang Denk overwriting the architecture dependent default 22954cf2609bSWolfgang Denk settings. 22964cf2609bSWolfgang Denk 22974cf2609bSWolfgang Denk- Frame Buffer Address: 22984cf2609bSWolfgang Denk CONFIG_FB_ADDR 22994cf2609bSWolfgang Denk 23004cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 23014cf2609bSWolfgang Denk address for frame buffer. 23024cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 23034cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 23046feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 23054cf2609bSWolfgang Denk 23064cf2609bSWolfgang Denk Please see board_init_f function. 23074cf2609bSWolfgang Denk 2308cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2309cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2310cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2311cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2312cccfc2abSDetlev Zundel 2313cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2314cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2315cccfc2abSDetlev Zundel 2316cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2317cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2318cccfc2abSDetlev Zundel 2319cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2320cccfc2abSDetlev Zundel Needed for mtdparts command support. 2321cccfc2abSDetlev Zundel 2322cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2323cccfc2abSDetlev Zundel 2324cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2325cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2326cccfc2abSDetlev Zundel 23276a11cf48SDaniel Schwierzeck- SPL framework 23286a11cf48SDaniel Schwierzeck CONFIG_SPL 23296a11cf48SDaniel Schwierzeck Enable building of SPL globally. 23306a11cf48SDaniel Schwierzeck 23316a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 23326a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 23336a11cf48SDaniel Schwierzeck 23346a11cf48SDaniel Schwierzeck CONFIG_SPL_LDSCRIPT 23356a11cf48SDaniel Schwierzeck LDSCRIPT for linking the SPL binary. 23366a11cf48SDaniel Schwierzeck 23376a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 23386a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 23396a11cf48SDaniel Schwierzeck 23406a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 23416a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 23426a11cf48SDaniel Schwierzeck 23436a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 23446a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 23456a11cf48SDaniel Schwierzeck 23466a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 23476a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 23486a11cf48SDaniel Schwierzeck 23496a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 23506a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 23516a11cf48SDaniel Schwierzeck 23526a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 23536a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 23546a11cf48SDaniel Schwierzeck 23556a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 23566a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 23576a11cf48SDaniel Schwierzeck 23586a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 23596a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 23606a11cf48SDaniel Schwierzeck 23616a11cf48SDaniel Schwierzeck CONFIG_SPL_FAT_SUPPORT 23626a11cf48SDaniel Schwierzeck Support for fs/fat/libfat.o in SPL binary 23636a11cf48SDaniel Schwierzeck 23646a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 23656a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 23661372cce2SMarian Balakowicz 2367c609719bSwdenkModem Support: 2368c609719bSwdenk-------------- 2369c609719bSwdenk 2370566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2371c609719bSwdenk 237211ccc33fSMarcel Ziswiler- Modem support enable: 2373c609719bSwdenk CONFIG_MODEM_SUPPORT 2374c609719bSwdenk 2375c609719bSwdenk- RTS/CTS Flow control enable: 2376c609719bSwdenk CONFIG_HWFLOW 2377c609719bSwdenk 2378c609719bSwdenk- Modem debug support: 2379c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2380c609719bSwdenk 2381c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2382c609719bSwdenk for modem support. Useful only with BDI2000. 2383c609719bSwdenk 2384a8c7c708Swdenk- Interrupt support (PPC): 2385a8c7c708Swdenk 2386a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2387a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 238811ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2389a8c7c708Swdenk should set decrementer_count to appropriate value. If 239011ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2391a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 239211ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2393a8c7c708Swdenk specific handling. If board has watchdog / status_led 2394a8c7c708Swdenk / other_activity_monitor it works automatically from 2395a8c7c708Swdenk general timer_interrupt(). 2396a8c7c708Swdenk 2397c609719bSwdenk- General: 2398c609719bSwdenk 2399c609719bSwdenk In the target system modem support is enabled when a 2400c609719bSwdenk specific key (key combination) is pressed during 2401c609719bSwdenk power-on. Otherwise U-Boot will boot normally 240211ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2403c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2404c609719bSwdenk function, returning 1 and thus enabling modem 2405c609719bSwdenk initialization. 2406c609719bSwdenk 2407c609719bSwdenk If there are no modem init strings in the 2408c609719bSwdenk environment, U-Boot proceed to autoboot; the 2409c609719bSwdenk previous output (banner, info printfs) will be 241011ccc33fSMarcel Ziswiler suppressed, though. 2411c609719bSwdenk 2412c609719bSwdenk See also: doc/README.Modem 2413c609719bSwdenk 2414c609719bSwdenk 2415c609719bSwdenkConfiguration Settings: 2416c609719bSwdenk----------------------- 2417c609719bSwdenk 24186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2419c609719bSwdenk undefine this when you're short of memory. 2420c609719bSwdenk 24212fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 24222fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 24232fb2604dSPeter Tyser 24246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2425c609719bSwdenk prompt for user input. 2426c609719bSwdenk 24276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2428c609719bSwdenk 24296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2430c609719bSwdenk 24316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2432c609719bSwdenk 24336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2434c609719bSwdenk the application (usually a Linux kernel) when it is 2435c609719bSwdenk booted 2436c609719bSwdenk 24376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2438c609719bSwdenk List of legal baudrate settings for this board. 2439c609719bSwdenk 24406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2441c609719bSwdenk Suppress display of console information at boot. 2442c609719bSwdenk 24436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2444c609719bSwdenk If the board specific function 2445c609719bSwdenk extern int overwrite_console (void); 2446c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2447c609719bSwdenk serial port, else the settings in the environment are used. 2448c609719bSwdenk 24496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2450c609719bSwdenk Enable the call to overwrite_console(). 2451c609719bSwdenk 24526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2453c609719bSwdenk Enable overwrite of previous console environment settings. 2454c609719bSwdenk 24556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2456c609719bSwdenk Begin and End addresses of the area used by the 2457c609719bSwdenk simple memory test. 2458c609719bSwdenk 24596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2460c609719bSwdenk Enable an alternate, more extensive memory test. 2461c609719bSwdenk 24626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 24635f535fe1Swdenk Scratch address used by the alternate memory test 24645f535fe1Swdenk You only need to set this if address zero isn't writeable 24655f535fe1Swdenk 24666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 24676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 246814f73ca6SStefan Roese this specified memory area will get subtracted from the top 246911ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 247014f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 247114f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 247214f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 24735e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 247414f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 24755e12e75dSStefan Roese will have to get fixed in Linux additionally. 247614f73ca6SStefan Roese 247714f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 247814f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 247914f73ca6SStefan Roese be touched. 248014f73ca6SStefan Roese 248114f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 248214f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 248314f73ca6SStefan Roese then the end address of the Linux memory will be located at a 248414f73ca6SStefan Roese non page size aligned address and this could cause major 248514f73ca6SStefan Roese problems. 248614f73ca6SStefan Roese 24876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2488c609719bSwdenk Default load address for network file downloads 2489c609719bSwdenk 24906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2491c609719bSwdenk Enable temporary baudrate change while serial download 2492c609719bSwdenk 24936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2494c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2495c609719bSwdenk 24966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2497c609719bSwdenk Physical start address of Motherboard I/O (if using a 2498c609719bSwdenk Cogent motherboard) 2499c609719bSwdenk 25006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2501c609719bSwdenk Physical start address of Flash memory. 2502c609719bSwdenk 25036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2504c609719bSwdenk Physical start address of boot monitor code (set by 2505c609719bSwdenk make config files to be same as the text base address 250614d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 25076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2508c609719bSwdenk 25096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 25103b57fe0aSwdenk Size of memory reserved for monitor code, used to 25113b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 25123b57fe0aSwdenk embedded within the U-Boot image, or in a separate 25133b57fe0aSwdenk flash sector. 2514c609719bSwdenk 25156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2516c609719bSwdenk Size of DRAM reserved for malloc() use. 2517c609719bSwdenk 25186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 251915940c9aSStefan Roese Normally compressed uImages are limited to an 252015940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 25216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 252215940c9aSStefan Roese to adjust this setting to your needs. 2523c609719bSwdenk 25246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2525c609719bSwdenk Maximum size of memory mapped by the startup code of 2526c609719bSwdenk the Linux kernel; all data that must be processed by 25277d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 25287d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 25297d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 25307d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2531c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2532c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2533c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2534c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2535c609719bSwdenk 2536fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2537fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2538fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2539fca43cc8SJohn Rigby is enabled. 2540fca43cc8SJohn Rigby 2541fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2542fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2543fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2544fca43cc8SJohn Rigby 2545fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2546fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2547fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2548fca43cc8SJohn Rigby 25496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2550c609719bSwdenk Max number of Flash memory banks 2551c609719bSwdenk 25526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2553c609719bSwdenk Max number of sectors on a Flash chip 2554c609719bSwdenk 25556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2556c609719bSwdenk Timeout for Flash erase operations (in ms) 2557c609719bSwdenk 25586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2559c609719bSwdenk Timeout for Flash write operations (in ms) 2560c609719bSwdenk 25616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 25628564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 25638564acf9Swdenk 25646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 25658564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 25668564acf9Swdenk 25676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 25688564acf9Swdenk If defined, hardware flash sectors protection is used 25698564acf9Swdenk instead of U-Boot software protection. 25708564acf9Swdenk 25716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2572c609719bSwdenk 2573c609719bSwdenk Enable TFTP transfers directly to flash memory; 2574c609719bSwdenk without this option such a download has to be 2575c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2576c609719bSwdenk copy from RAM to flash. 2577c609719bSwdenk 2578c609719bSwdenk The two-step approach is usually more reliable, since 2579c609719bSwdenk you can check if the download worked before you erase 258011ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 258111ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2582c609719bSwdenk downloaded image) this option may be very useful. 2583c609719bSwdenk 25846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2585c609719bSwdenk Define if the flash driver uses extra elements in the 25865653fc33Swdenk common flash structure for storing flash geometry. 25875653fc33Swdenk 258800b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 25895653fc33Swdenk This option also enables the building of the cfi_flash driver 25905653fc33Swdenk in the drivers directory 259153cf9435Sstroese 259291809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 259391809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 259491809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 259591809ed5SPiotr Ziecik to the MTD layer. 259691809ed5SPiotr Ziecik 25976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 259896ef831fSGuennadi Liakhovetski Use buffered writes to flash. 259996ef831fSGuennadi Liakhovetski 260096ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 260196ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 260296ef831fSGuennadi Liakhovetski write commands. 260396ef831fSGuennadi Liakhovetski 26046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 26055568e613SStefan Roese If this option is defined, the common CFI flash doesn't 26065568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 26075568e613SStefan Roese is useful, if some of the configured banks are only 26085568e613SStefan Roese optionally available. 26095568e613SStefan Roese 26109a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 26119a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 26129a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 26139a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 26149a042e9cSJerry Van Baren 26156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 261611ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 261711ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 261853cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 261953cf9435Sstroese buffers can be full shortly after enabling the interface 262011ccc33fSMarcel Ziswiler on high Ethernet traffic. 262153cf9435Sstroese Defaults to 4 if not defined. 2622c609719bSwdenk 2623ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2624ea882bafSWolfgang Denk 2625ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2626ea882bafSWolfgang Denk internally to store the environment settings. The default 2627ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2628ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2629ea882bafSWolfgang Denk lib/hashtable.c for details. 2630ea882bafSWolfgang Denk 2631c609719bSwdenkThe following definitions that deal with the placement and management 2632c609719bSwdenkof environment data (variable area); in general, we support the 2633c609719bSwdenkfollowing configurations: 2634c609719bSwdenk 2635c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2636c3eb3fe4SMike Frysinger 2637c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2638c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2639c3eb3fe4SMike Frysinger 26405a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2641c609719bSwdenk 2642c609719bSwdenk Define this if the environment is in flash memory. 2643c609719bSwdenk 2644c609719bSwdenk a) The environment occupies one whole flash sector, which is 2645c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2646c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2647c609719bSwdenk sector" type flash chips, which have several smaller 2648c609719bSwdenk sectors at the start or the end. For instance, such a 2649c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2650c609719bSwdenk such a case you would place the environment in one of the 2651c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2652c609719bSwdenk "top boot sector" type flash chips, you would put the 2653c609719bSwdenk environment in one of the last sectors, leaving a gap 2654c609719bSwdenk between U-Boot and the environment. 2655c609719bSwdenk 26560e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2657c609719bSwdenk 2658c609719bSwdenk Offset of environment data (variable area) to the 2659c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2660c609719bSwdenk type flash chips the second sector can be used: the offset 2661c609719bSwdenk for this sector is given here. 2662c609719bSwdenk 26636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2664c609719bSwdenk 26650e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2666c609719bSwdenk 2667c609719bSwdenk This is just another way to specify the start address of 2668c609719bSwdenk the flash sector containing the environment (instead of 26690e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2670c609719bSwdenk 26710e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2672c609719bSwdenk 2673c609719bSwdenk Size of the sector containing the environment. 2674c609719bSwdenk 2675c609719bSwdenk 2676c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2677c609719bSwdenk In such a case you don't want to spend a whole sector for 2678c609719bSwdenk the environment. 2679c609719bSwdenk 26800e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2681c609719bSwdenk 26825a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 26830e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2684c609719bSwdenk of this flash sector for the environment. This saves 2685c609719bSwdenk memory for the RAM copy of the environment. 2686c609719bSwdenk 2687c609719bSwdenk It may also save flash memory if you decide to use this 2688c609719bSwdenk when your environment is "embedded" within U-Boot code, 2689c609719bSwdenk since then the remainder of the flash sector could be used 2690c609719bSwdenk for U-Boot code. It should be pointed out that this is 2691c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2692c609719bSwdenk updating the environment in flash makes it always 2693c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2694c609719bSwdenk wrong before the contents has been restored from a copy in 2695c609719bSwdenk RAM, your target system will be dead. 2696c609719bSwdenk 26970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 26980e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2699c609719bSwdenk 2700c609719bSwdenk These settings describe a second storage area used to hold 270111ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 27023e38691eSwdenk a valid backup copy in case there is a power failure during 2703c609719bSwdenk a "saveenv" operation. 2704c609719bSwdenk 2705c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2706c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2707c609719bSwdenkaccordingly! 2708c609719bSwdenk 2709c609719bSwdenk 27109314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2711c609719bSwdenk 2712c609719bSwdenk Define this if you have some non-volatile memory device 2713c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2714c609719bSwdenk environment. 2715c609719bSwdenk 27160e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 27170e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2718c609719bSwdenk 271911ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2720c609719bSwdenk want to use for environment. It is assumed that this memory 2721c609719bSwdenk can just be read and written to, without any special 2722c609719bSwdenk provision. 2723c609719bSwdenk 2724c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2725c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 272611ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2727c609719bSwdenkU-Boot will hang. 2728c609719bSwdenk 2729c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2730c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2731c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2732c609719bSwdenkto save the current settings. 2733c609719bSwdenk 2734c609719bSwdenk 2735bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2736c609719bSwdenk 2737c609719bSwdenk Use this if you have an EEPROM or similar serial access 2738c609719bSwdenk device and a driver for it. 2739c609719bSwdenk 27400e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 27410e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2742c609719bSwdenk 2743c609719bSwdenk These two #defines specify the offset and size of the 2744c609719bSwdenk environment area within the total memory of your EEPROM. 2745c609719bSwdenk 27466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2747c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2748c609719bSwdenk The default address is zero. 2749c609719bSwdenk 27506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2751c609719bSwdenk If defined, the number of bits used to address bytes in a 2752c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2753c609719bSwdenk would require six bits. 2754c609719bSwdenk 27556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2756c609719bSwdenk If defined, the number of milliseconds to delay between 2757c609719bSwdenk page writes. The default is zero milliseconds. 2758c609719bSwdenk 27596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2760c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2761c609719bSwdenk that this is NOT the chip address length! 2762c609719bSwdenk 27636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 27645cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 27655cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 27665cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 27675cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 27685cf91d6bSwdenk byte chips. 27695cf91d6bSwdenk 27705cf91d6bSwdenk Note that we consider the length of the address field to 27715cf91d6bSwdenk still be one byte because the extra address bits are hidden 27725cf91d6bSwdenk in the chip address. 27735cf91d6bSwdenk 27746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2775c609719bSwdenk The size in bytes of the EEPROM device. 2776c609719bSwdenk 2777548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 2778548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 2779548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 2780548738b4SHeiko Schocher 2781548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 2782548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 2783548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 2784548738b4SHeiko Schocher EEPROM. For example: 2785548738b4SHeiko Schocher 2786548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 2787548738b4SHeiko Schocher 2788548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 2789548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 2790c609719bSwdenk 2791057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 27925779d8d9Swdenk 27935779d8d9Swdenk Define this if you have a DataFlash memory device which you 27945779d8d9Swdenk want to use for the environment. 27955779d8d9Swdenk 27960e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 27970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 27980e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 27995779d8d9Swdenk 28005779d8d9Swdenk These three #defines specify the offset and size of the 28015779d8d9Swdenk environment area within the total memory of your DataFlash placed 28025779d8d9Swdenk at the specified address. 28035779d8d9Swdenk 280451bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 280513a5695bSwdenk 280613a5695bSwdenk Define this if you have a NAND device which you want to use 280713a5695bSwdenk for the environment. 280813a5695bSwdenk 28090e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 28100e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 281113a5695bSwdenk 281213a5695bSwdenk These two #defines specify the offset and size of the environment 2813fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 2814fdd813deSScott Wood aligned to an erase block boundary. 28155779d8d9Swdenk 2816fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 2817e443c944SMarkus Klotzbuecher 28180e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2819fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 2820fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 2821fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 2822fdd813deSScott Wood aligned to an erase block boundary. 2823e443c944SMarkus Klotzbuecher 2824fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 2825fdd813deSScott Wood 2826fdd813deSScott Wood Specifies the length of the region in which the environment 2827fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 2828fdd813deSScott Wood block size. Specifying a range with more erase blocks than 2829fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 2830fdd813deSScott Wood the range to be avoided. 2831fdd813deSScott Wood 2832fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 2833fdd813deSScott Wood 2834fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 2835fdd813deSScott Wood environment from block zero's out-of-band data. The 2836fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 2837fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 2838fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 2839e443c944SMarkus Klotzbuecher 2840b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 2841b74ab737SGuennadi Liakhovetski 2842b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 2843b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 2844b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 2845b74ab737SGuennadi Liakhovetski 28466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 2847c609719bSwdenk 2848c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2849c609719bSwdenk area is used at an early stage (ROM part) if the environment 2850c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2851c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2852c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2853c609719bSwdenk to be a good choice since it makes it far enough from the 2854c609719bSwdenk start of the data area as well as from the stack pointer. 2855c609719bSwdenk 2856e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2857c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2858cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 2859c609719bSwdenkuntil then to read environment variables. 2860c609719bSwdenk 286185ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 286285ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 286385ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 286485ec0bccSwdenknecessary, because the first environment variable we need is the 286585ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 286685ec0bccSwdenkhave any device yet where we could complain.] 2867c609719bSwdenk 2868c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2869c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 287085ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2871c609719bSwdenk 28726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 2873fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2874fc3e2165Swdenk 28756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 2876fc3e2165Swdenk also needs to be defined. 2877fc3e2165Swdenk 28786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 2879fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2880c609719bSwdenk 2881f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 2882f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 2883f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 2884f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 2885f5675aa5SRon Madrid space for already greatly restricted images, including but not 2886f5675aa5SRon Madrid limited to NAND_SPL configurations. 2887f5675aa5SRon Madrid 2888c609719bSwdenkLow Level (hardware related) configuration options: 2889dc7c9a1aSwdenk--------------------------------------------------- 2890c609719bSwdenk 28916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 2892c609719bSwdenk Cache Line Size of the CPU. 2893c609719bSwdenk 28946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 2895c609719bSwdenk Default address of the IMMR after system reset. 28962535d602Swdenk 28972535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 28982535d602Swdenk and RPXsuper) to be able to adjust the position of 28992535d602Swdenk the IMMR register after a reset. 2900c609719bSwdenk 2901e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 2902e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 2903e46fedfeSTimur Tabi PowerPC SOCs. 2904e46fedfeSTimur Tabi 2905e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 2906e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 2907e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 2908e46fedfeSTimur Tabi 2909e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 2910e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 2911e46fedfeSTimur Tabi 2912e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 2913e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 2914e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 2915e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 2916e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 2917e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 2918e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 2919e46fedfeSTimur Tabi 2920e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 2921e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 2922e46fedfeSTimur Tabi 2923e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 2924e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 2925e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 2926e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 2927e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 2928e46fedfeSTimur Tabi 2929e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 2930e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 2931e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 2932e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 2933e46fedfeSTimur Tabi 2934e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 2935e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 2936e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 2937e46fedfeSTimur Tabi 29387f6c2cbcSwdenk- Floppy Disk Support: 29396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 29407f6c2cbcSwdenk 29417f6c2cbcSwdenk the default drive number (default value 0) 29427f6c2cbcSwdenk 29436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 29447f6c2cbcSwdenk 294511ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 29467f6c2cbcSwdenk (default value 1) 29477f6c2cbcSwdenk 29486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 29497f6c2cbcSwdenk 29507f6c2cbcSwdenk defines the offset of register from address. It 29517f6c2cbcSwdenk depends on which part of the data bus is connected to 295211ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 29537f6c2cbcSwdenk 29546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 29556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 29567f6c2cbcSwdenk default value. 29577f6c2cbcSwdenk 29586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 29597f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 29607f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 29617f6c2cbcSwdenk source code. It is used to make hardware dependant 29627f6c2cbcSwdenk initializations. 29637f6c2cbcSwdenk 29640abddf82SMacpaul Lin- CONFIG_IDE_AHB: 29650abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 29660abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 29670abddf82SMacpaul Lin When software is doing ATA command and data transfer to 29680abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 29690abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 29700abddf82SMacpaul Lin is requierd. 29710abddf82SMacpaul Lin 29726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 297325d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 297425d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2975c609719bSwdenk 29766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 2977c609719bSwdenk 29787152b1d0Swdenk Start address of memory area that can be used for 2979c609719bSwdenk initial data and stack; please note that this must be 2980c609719bSwdenk writable memory that is working WITHOUT special 2981c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2982c609719bSwdenk will become available only after programming the 2983c609719bSwdenk memory controller and running certain initialization 2984c609719bSwdenk sequences. 2985c609719bSwdenk 2986c609719bSwdenk U-Boot uses the following memory types: 2987c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2988c609719bSwdenk - MPC824X: data cache 2989c609719bSwdenk - PPC4xx: data cache 2990c609719bSwdenk 29916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 2992c609719bSwdenk 2993c609719bSwdenk Offset of the initial data structure in the memory 29946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 29956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 2996c609719bSwdenk data is located at the end of the available space 2997553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 29986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 29996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 30006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3001c609719bSwdenk 3002c609719bSwdenk Note: 3003c609719bSwdenk On the MPC824X (or other systems that use the data 3004c609719bSwdenk cache for initial memory) the address chosen for 30056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3006c609719bSwdenk point to an otherwise UNUSED address space between 3007c609719bSwdenk the top of RAM and the start of the PCI space. 3008c609719bSwdenk 30096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3010c609719bSwdenk 30116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3012c609719bSwdenk 30136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3014c609719bSwdenk 30156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3016c609719bSwdenk 30176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3018c609719bSwdenk 30196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3020c609719bSwdenk 30216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3022c609719bSwdenk SDRAM timing 3023c609719bSwdenk 30246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3025c609719bSwdenk periodic timer for refresh 3026c609719bSwdenk 30276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3028c609719bSwdenk 30296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 30306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 30316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 30326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3033c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3034c609719bSwdenk 3035c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 30366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 30376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3038c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3039c609719bSwdenk 30406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 30416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3042c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3043c609719bSwdenk Prescaler definitions (SDRAM timing) 3044c609719bSwdenk 30456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3046c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3047c609719bSwdenk define relocation offset in DPRAM [DSP2] 3048c609719bSwdenk 30496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3050b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3051b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3052b423d055SHeiko Schocher 30536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3054c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3055c609719bSwdenk define relocation offset in DPRAM [SCC4] 3056c609719bSwdenk 30576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3058c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3059c609719bSwdenk wrong setting might damage your board. Read 3060c609719bSwdenk doc/README.MBX before setting this variable! 3061c609719bSwdenk 30626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3063ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3064ea909b76Swdenk (Power On Self Tests). This definition overrides 3065ea909b76Swdenk #define'd default value in commproc.h resp. 3066ea909b76Swdenk cpm_8260.h. 3067ea909b76Swdenk 30686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 30696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 30706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 30716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 30726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 30736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 30746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 30756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3076a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 30775d232d0eSwdenk 30789cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 30799cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 30809cacf4fcSDirk Eibach required. 30819cacf4fcSDirk Eibach 3082a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3083a09b9b68SKumar Gala Chip has SRIO or not 3084a09b9b68SKumar Gala 3085a09b9b68SKumar Gala- CONFIG_SRIO1: 3086a09b9b68SKumar Gala Board has SRIO 1 port available 3087a09b9b68SKumar Gala 3088a09b9b68SKumar Gala- CONFIG_SRIO2: 3089a09b9b68SKumar Gala Board has SRIO 2 port available 3090a09b9b68SKumar Gala 3091a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3092a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3093a09b9b68SKumar Gala 3094a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3095a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3096a09b9b68SKumar Gala 3097a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3098a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3099a09b9b68SKumar Gala 3100eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3101eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3102eced4626SAlex Waterman 16 bit bus. 3103eced4626SAlex Waterman 3104eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3105eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3106eced4626SAlex Waterman a default value will be used. 3107eced4626SAlex Waterman 3108bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3109218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3110218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3111218ca724SWolfgang Denk 3112bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3113bb99ad6dSBen Warren I2C address of the SPD EEPROM 3114bb99ad6dSBen Warren 31156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3116218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3117218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3118218ca724SWolfgang Denk to something your driver can deal with. 3119bb99ad6dSBen Warren 31201b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 31211b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 31221b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 31231b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 31241b3e3c4fSYork Sun header files or board specific files. 31251b3e3c4fSYork Sun 31266f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 31276f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 31286f5e1dc5SYork Sun 31296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3130218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3131218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 31322ad6b513STimur Tabi 3133c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3134c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3135c26e454dSwdenk 3136c26e454dSwdenk- CONFIG_FEC[12]_PHY 3137c26e454dSwdenk Define to the hardcoded PHY address which corresponds 31386e592385Swdenk to the given FEC; i. e. 3139c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3140c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3141c26e454dSwdenk 3142c26e454dSwdenk When set to -1, means to probe for first available. 3143c26e454dSwdenk 3144c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3145c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3146c26e454dSwdenk (so program the FEC to ignore it). 3147c26e454dSwdenk 3148c26e454dSwdenk- CONFIG_RMII 3149c26e454dSwdenk Enable RMII mode for all FECs. 3150c26e454dSwdenk Note that this is a global option, we can't 3151c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3152c26e454dSwdenk 31535cf91d6bSwdenk- CONFIG_CRC32_VERIFY 31545cf91d6bSwdenk Add a verify option to the crc32 command. 31555cf91d6bSwdenk The syntax is: 31565cf91d6bSwdenk 31575cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 31585cf91d6bSwdenk 31595cf91d6bSwdenk Where address/count indicate a memory area 31605cf91d6bSwdenk and crc32 is the correct crc32 which the 31615cf91d6bSwdenk area should have. 31625cf91d6bSwdenk 316356523f12Swdenk- CONFIG_LOOPW 316456523f12Swdenk Add the "loopw" memory command. This only takes effect if 3165602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 316656523f12Swdenk 31677b466641Sstroese- CONFIG_MX_CYCLIC 31687b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 31697b466641Sstroese "md/mw" commands. 31707b466641Sstroese Examples: 31717b466641Sstroese 31727b466641Sstroese => mdc.b 10 4 500 31737b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 31747b466641Sstroese 31757b466641Sstroese => mwc.l 100 12345678 10 31767b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 31777b466641Sstroese 31787b466641Sstroese This only takes effect if the memory commands are activated 3179602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 31807b466641Sstroese 31818aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3182afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3183e03f3169SWolfgang Denk low level initializations (like setting up the memory 3184e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3185e03f3169SWolfgang Denk relocate itself into RAM. 31868aa1a2d1Swdenk 3187e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3188e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3189e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3190e03f3169SWolfgang Denk these initializations itself. 31918aa1a2d1Swdenk 3192401bb30bSAneesh V- CONFIG_SPL_BUILD 3193df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3194df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3195df81238bSMagnus Lilja compiling a NAND SPL. 3196400558b5Swdenk 3197d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3198d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3199d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3200d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3201d8834a13SMatthias Weisser conditions but may increase the binary size. 3202d8834a13SMatthias Weisser 3203c609719bSwdenkBuilding the Software: 3204c609719bSwdenk====================== 3205c609719bSwdenk 3206218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3207218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3208218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3209218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3210218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3211218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3212c609719bSwdenk 3213218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3214218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3215218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3216218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3217218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3218c609719bSwdenk 3219218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3220218ca724SWolfgang Denk $ export CROSS_COMPILE 3221c609719bSwdenk 32222f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 32232f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 32242f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 32252f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 32262f8d396bSPeter Tyser 32272f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 32282f8d396bSPeter Tyser 32292f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 32302f8d396bSPeter Tyser be executed on computers running Windows. 32312f8d396bSPeter Tyser 3232c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3233c609719bSwdenksources you must configure U-Boot for one specific board type. This 3234c609719bSwdenkis done by typing: 3235c609719bSwdenk 3236c609719bSwdenk make NAME_config 3237c609719bSwdenk 3238218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 3239218ca724SWolfgang Denkrations; see the main Makefile for supported names. 324054387ac9Swdenk 3241c609719bSwdenkNote: for some board special configuration names may exist; check if 3242c609719bSwdenk additional information is available from the board vendor; for 32432729af9dSwdenk instance, the TQM823L systems are available without (standard) 32442729af9dSwdenk or with LCD support. You can select such additional "features" 324511ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3246c609719bSwdenk 32472729af9dSwdenk make TQM823L_config 32482729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3249c609719bSwdenk 3250c609719bSwdenk make TQM823L_LCD_config 3251c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3252c609719bSwdenk 3253c609719bSwdenk etc. 3254c609719bSwdenk 3255c609719bSwdenk 3256c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 32577152b1d0Swdenkimages ready for download to / installation on your system: 3258c609719bSwdenk 3259c609719bSwdenk- "u-boot.bin" is a raw binary image 3260c609719bSwdenk- "u-boot" is an image in ELF binary format 3261c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3262c609719bSwdenk 3263baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3264baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3265baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3266baf31249SMarian Balakowicz 3267baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3268baf31249SMarian Balakowicz 3269baf31249SMarian Balakowicz make O=/tmp/build distclean 3270baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3271baf31249SMarian Balakowicz make O=/tmp/build all 3272baf31249SMarian Balakowicz 3273baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3274baf31249SMarian Balakowicz 3275baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3276baf31249SMarian Balakowicz make distclean 3277baf31249SMarian Balakowicz make NAME_config 3278baf31249SMarian Balakowicz make all 3279baf31249SMarian Balakowicz 3280baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3281baf31249SMarian Balakowiczvariable. 3282baf31249SMarian Balakowicz 3283c609719bSwdenk 3284c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3285c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3286c609719bSwdenknative "make". 3287c609719bSwdenk 3288c609719bSwdenk 3289c609719bSwdenkIf the system board that you have is not listed, then you will need 3290c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3291c609719bSwdenksteps: 3292c609719bSwdenk 3293c609719bSwdenk1. Add a new configuration option for your board to the toplevel 329485ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 329585ec0bccSwdenk entries as examples. Note that here and at many other places 32967152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 329785ec0bccSwdenk keep this order. 3298c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 329985ec0bccSwdenk files you need. In your board directory, you will need at least 330085ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 330185ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 330285ec0bccSwdenk your board 3303c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3304c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 330585ec0bccSwdenk4. Run "make <board>_config" with your new name. 3306c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3307c609719bSwdenk to be installed on your target system. 330885ec0bccSwdenk6. Debug and solve any problems that might arise. 3309c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3310c609719bSwdenk 3311c609719bSwdenk 3312c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3313c609719bSwdenk============================================================== 3314c609719bSwdenk 3315c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3316c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3317c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3318c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3319218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3320c609719bSwdenk 3321c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3322c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3323c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3324c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3325c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 33267152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3327218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3328218ca724SWolfgang Denkyou can type 3329c609719bSwdenk 3330c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3331c609719bSwdenk 3332c609719bSwdenkor to build on a native PowerPC system you can type 3333c609719bSwdenk 3334c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3335c609719bSwdenk 3336218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3337218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3338218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3339218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3340218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3341218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3342218ca724SWolfgang Denkvariable. For example: 3343baf31249SMarian Balakowicz 3344baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3345baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3346baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3347baf31249SMarian Balakowicz 3348218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3349218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3350218ca724SWolfgang Denkduring the whole build process. 3351baf31249SMarian Balakowicz 3352baf31249SMarian Balakowicz 3353c609719bSwdenkSee also "U-Boot Porting Guide" below. 3354c609719bSwdenk 3355c609719bSwdenk 3356c609719bSwdenkMonitor Commands - Overview: 3357c609719bSwdenk============================ 3358c609719bSwdenk 3359c609719bSwdenkgo - start application at address 'addr' 3360c609719bSwdenkrun - run commands in an environment variable 3361c609719bSwdenkbootm - boot application image from memory 3362c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3363c609719bSwdenktftpboot- boot image via network using TFTP protocol 3364c609719bSwdenk and env variables "ipaddr" and "serverip" 3365c609719bSwdenk (and eventually "gatewayip") 33661fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3367c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3368c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3369c609719bSwdenkloads - load S-Record file over serial line 3370c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3371c609719bSwdenkmd - memory display 3372c609719bSwdenkmm - memory modify (auto-incrementing) 3373c609719bSwdenknm - memory modify (constant address) 3374c609719bSwdenkmw - memory write (fill) 3375c609719bSwdenkcp - memory copy 3376c609719bSwdenkcmp - memory compare 3377c609719bSwdenkcrc32 - checksum calculation 33780f89c54bSPeter Tyseri2c - I2C sub-system 3379c609719bSwdenksspi - SPI utility commands 3380c609719bSwdenkbase - print or set address offset 3381c609719bSwdenkprintenv- print environment variables 3382c609719bSwdenksetenv - set environment variables 3383c609719bSwdenksaveenv - save environment variables to persistent storage 3384c609719bSwdenkprotect - enable or disable FLASH write protection 3385c609719bSwdenkerase - erase FLASH memory 3386c609719bSwdenkflinfo - print FLASH memory information 3387c609719bSwdenkbdinfo - print Board Info structure 3388c609719bSwdenkiminfo - print header information for application image 3389c609719bSwdenkconinfo - print console devices and informations 3390c609719bSwdenkide - IDE sub-system 3391c609719bSwdenkloop - infinite loop on address range 339256523f12Swdenkloopw - infinite write loop on address range 3393c609719bSwdenkmtest - simple RAM test 3394c609719bSwdenkicache - enable or disable instruction cache 3395c609719bSwdenkdcache - enable or disable data cache 3396c609719bSwdenkreset - Perform RESET of the CPU 3397c609719bSwdenkecho - echo args to console 3398c609719bSwdenkversion - print monitor version 3399c609719bSwdenkhelp - print online help 3400c609719bSwdenk? - alias for 'help' 3401c609719bSwdenk 3402c609719bSwdenk 3403c609719bSwdenkMonitor Commands - Detailed Description: 3404c609719bSwdenk======================================== 3405c609719bSwdenk 3406c609719bSwdenkTODO. 3407c609719bSwdenk 3408c609719bSwdenkFor now: just type "help <command>". 3409c609719bSwdenk 3410c609719bSwdenk 3411c609719bSwdenkEnvironment Variables: 3412c609719bSwdenk====================== 3413c609719bSwdenk 3414c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3415c609719bSwdenkcan be made persistent by saving to Flash memory. 3416c609719bSwdenk 3417c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3418c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3419c609719bSwdenkwithout a value can be used to delete a variable from the 3420c609719bSwdenkenvironment. As long as you don't save the environment you are 3421c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3422c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3423c609719bSwdenk 3424c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3425c96f86eeSWolfgang Denk 3426c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3427c609719bSwdenk 3428c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3429c609719bSwdenk 3430c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3431c609719bSwdenk 3432c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3433c609719bSwdenk 3434c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3435c609719bSwdenk 3436c609719bSwdenk bootfile - Name of the image to load with TFTP 3437c609719bSwdenk 34387d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 34397d721e34SBartlomiej Sieka command can be restricted. This variable is given as 34407d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 34417d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 34427d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 34437d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3444c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3445c3624e6eSGrant Likely bootm_mapsize. 3446c3624e6eSGrant Likely 3447c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3448c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3449c3624e6eSGrant Likely defines the size of the memory region starting at base 3450c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3451c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3452c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3453c3624e6eSGrant Likely used otherwise. 34547d721e34SBartlomiej Sieka 34557d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 34567d721e34SBartlomiej Sieka command can be restricted. This variable is given as 34577d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 34587d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 34597d721e34SBartlomiej Sieka environment variable. 34607d721e34SBartlomiej Sieka 34614bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 34624bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 34634bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 34644bae9090SBartlomiej Sieka 3465c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3466c609719bSwdenk "bootp" will just load perform a lookup of the 3467c609719bSwdenk configuration from the BOOTP server, but not try to 3468c609719bSwdenk load any image using TFTP 3469c609719bSwdenk 3470c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3471c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3472c609719bSwdenk be automatically started (by internally calling 3473c609719bSwdenk "bootm") 3474c609719bSwdenk 34754a6fd34bSwdenk If set to "no", a standalone image passed to the 34764a6fd34bSwdenk "bootm" command will be copied to the load address 34774a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 34784a6fd34bSwdenk This can be used to load and uncompress arbitrary 34794a6fd34bSwdenk data. 34804a6fd34bSwdenk 3481a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3482a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3483a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3484a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3485a28afca5SDavid A. Long to work it must reside in writable memory, have 3486a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3487a28afca5SDavid A. Long add the information it needs into it, and the memory 3488a28afca5SDavid A. Long must be accessible by the kernel. 3489a28afca5SDavid A. Long 349017ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 349117ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 349217ea1177Swdenk mode (400kHZ). This environment variable is used in 349317ea1177Swdenk initialization code. So, for changes to be effective 349417ea1177Swdenk it must be saved and board must be reset. 349517ea1177Swdenk 3496c609719bSwdenk initrd_high - restrict positioning of initrd images: 3497c609719bSwdenk If this variable is not set, initrd images will be 3498c609719bSwdenk copied to the highest possible address in RAM; this 3499c609719bSwdenk is usually what you want since it allows for 3500c609719bSwdenk maximum initrd size. If for some reason you want to 3501c609719bSwdenk make sure that the initrd image is loaded below the 35026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3503c609719bSwdenk variable to a value of "no" or "off" or "0". 3504c609719bSwdenk Alternatively, you can set it to a maximum upper 3505c609719bSwdenk address to use (U-Boot will still check that it 3506c609719bSwdenk does not overwrite the U-Boot stack and data). 3507c609719bSwdenk 3508c609719bSwdenk For instance, when you have a system with 16 MB 35097152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3510c609719bSwdenk you can do this by adding "mem=12M" to the value of 3511c609719bSwdenk the "bootargs" variable. However, now you must make 35127152b1d0Swdenk sure that the initrd image is placed in the first 3513c609719bSwdenk 12 MB as well - this can be done with 3514c609719bSwdenk 3515c609719bSwdenk setenv initrd_high 00c00000 3516c609719bSwdenk 351738b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 351838b99261Swdenk indication to U-Boot that all addresses are legal 351938b99261Swdenk for the Linux kernel, including addresses in flash 352038b99261Swdenk memory. In this case U-Boot will NOT COPY the 352138b99261Swdenk ramdisk at all. This may be useful to reduce the 352238b99261Swdenk boot time on your system, but requires that this 352338b99261Swdenk feature is supported by your Linux kernel. 352438b99261Swdenk 3525c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3526c609719bSwdenk 3527c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3528dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3529c609719bSwdenk 3530c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3531c609719bSwdenk 3532c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3533c609719bSwdenk 3534c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3535c609719bSwdenk 3536c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3537c609719bSwdenk 3538c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3539c609719bSwdenk 3540e2a53458SMike Frysinger ethprime - controls which interface is used first. 3541a3d991bdSwdenk 3542e2a53458SMike Frysinger ethact - controls which interface is currently active. 3543e2a53458SMike Frysinger For example you can do the following 3544a3d991bdSwdenk 354548690d80SHeiko Schocher => setenv ethact FEC 354648690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 354748690d80SHeiko Schocher => setenv ethact SCC 354848690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3549a3d991bdSwdenk 3550e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3551e1692577SMatthias Fuchs available network interfaces. 3552e1692577SMatthias Fuchs It just stays at the currently selected interface. 3553e1692577SMatthias Fuchs 3554a3d991bdSwdenk netretry - When set to "no" each network operation will 3555a3d991bdSwdenk either succeed or fail without retrying. 35566e592385Swdenk When set to "once" the network operation will 35576e592385Swdenk fail when all the available network interfaces 35586e592385Swdenk are tried once without success. 3559a3d991bdSwdenk Useful on scripts which control the retry operation 3560a3d991bdSwdenk themselves. 3561a3d991bdSwdenk 3562b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3563a1cf027aSJean-Christophe PLAGNIOL-VILLARD 356428cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3565ecb0ccd9SWolfgang Denk UDP source port. 3566ecb0ccd9SWolfgang Denk 356728cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 356828cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 356928cb9375SWolfgang Denk 3570c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3571c96f86eeSWolfgang Denk we use the TFTP server's default block size 3572c96f86eeSWolfgang Denk 3573c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3574c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3575c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3576c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3577c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3578c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3579c96f86eeSWolfgang Denk with unreliable TFTP servers. 3580c96f86eeSWolfgang Denk 3581a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 358211ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3583a3d991bdSwdenk VLAN tagged frames. 3584c609719bSwdenk 3585dc0b7b0eSJason HobbsThe following image location variables contain the location of images 3586dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 3587dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 3588dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 3589dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 3590dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 3591dc0b7b0eSJason Hobbsflash or offset in NAND flash. 3592dc0b7b0eSJason Hobbs 3593dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 3594dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 3595dc0b7b0eSJason Hobbsboards use these variables for other purposes. 3596dc0b7b0eSJason Hobbs 3597dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 3598dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 3599dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 3600dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 3601dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 3602dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 3603dc0b7b0eSJason Hobbs 3604c609719bSwdenkThe following environment variables may be used and automatically 3605c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3606c609719bSwdenkdepending the information provided by your boot server: 3607c609719bSwdenk 3608c609719bSwdenk bootfile - see above 3609c609719bSwdenk dnsip - IP address of your Domain Name Server 3610fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3611c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3612c609719bSwdenk hostname - Target hostname 3613c609719bSwdenk ipaddr - see above 3614c609719bSwdenk netmask - Subnet Mask 3615c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3616c609719bSwdenk serverip - see above 3617c609719bSwdenk 3618c609719bSwdenk 3619c609719bSwdenkThere are two special Environment Variables: 3620c609719bSwdenk 3621c609719bSwdenk serial# - contains hardware identification information such 3622c609719bSwdenk as type string and/or serial number 3623c609719bSwdenk ethaddr - Ethernet address 3624c609719bSwdenk 3625c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3626c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3627c609719bSwdenkonce they have been set once. 3628c609719bSwdenk 3629c609719bSwdenk 3630c1551ea8SstroeseFurther special Environment Variables: 3631c1551ea8Sstroese 3632c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3633c1551ea8Sstroese with the "version" command. This variable is 3634c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3635c1551ea8Sstroese 3636c1551ea8Sstroese 3637c609719bSwdenkPlease note that changes to some configuration parameters may take 3638c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3639c609719bSwdenk 3640c609719bSwdenk 3641f07771ccSwdenkCommand Line Parsing: 3642f07771ccSwdenk===================== 3643f07771ccSwdenk 3644f07771ccSwdenkThere are two different command line parsers available with U-Boot: 36457152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3646f07771ccSwdenk 3647f07771ccSwdenkOld, simple command line parser: 3648f07771ccSwdenk-------------------------------- 3649f07771ccSwdenk 3650f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3651f07771ccSwdenk- several commands on one line, separated by ';' 3652fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3653f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3654f07771ccSwdenk for example: 3655fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3656f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3657f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3658f07771ccSwdenk 3659f07771ccSwdenkHush shell: 3660f07771ccSwdenk----------- 3661f07771ccSwdenk 3662f07771ccSwdenk- similar to Bourne shell, with control structures like 3663f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3664f07771ccSwdenk until...do...done, ... 3665f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3666f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3667f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3668f07771ccSwdenk command 3669f07771ccSwdenk 3670f07771ccSwdenkGeneral rules: 3671f07771ccSwdenk-------------- 3672f07771ccSwdenk 3673f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3674f07771ccSwdenk command) contains several commands separated by semicolon, and 3675f07771ccSwdenk one of these commands fails, then the remaining commands will be 3676f07771ccSwdenk executed anyway. 3677f07771ccSwdenk 3678f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 367911ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3680f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3681f07771ccSwdenk variables are not executed. 3682f07771ccSwdenk 3683c609719bSwdenkNote for Redundant Ethernet Interfaces: 3684c609719bSwdenk======================================= 3685c609719bSwdenk 368611ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3687c609719bSwdenksuch configurations and is capable of automatic selection of a 36887152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3689c609719bSwdenk 3690c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3691c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3692c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3693c609719bSwdenk 3694c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3695c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3696c609719bSwdenkding setting in the environment; if the corresponding environment 3697c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3698c609719bSwdenk 3699c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3700c609719bSwdenk environment, the SROM's address is used. 3701c609719bSwdenk 3702c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3703c609719bSwdenk environment exists, then the value from the environment variable is 3704c609719bSwdenk used. 3705c609719bSwdenk 3706c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3707c609719bSwdenk both addresses are the same, this MAC address is used. 3708c609719bSwdenk 3709c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3710c609719bSwdenk addresses differ, the value from the environment is used and a 3711c609719bSwdenk warning is printed. 3712c609719bSwdenk 3713c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3714c609719bSwdenk is raised. 3715c609719bSwdenk 3716ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 3717ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 3718ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 3719ecee9324SBen WarrenThe naming convention is as follows: 3720ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 3721c609719bSwdenk 3722c609719bSwdenkImage Formats: 3723c609719bSwdenk============== 3724c609719bSwdenk 37253310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 37263310c549SMarian Balakowiczimages in two formats: 37273310c549SMarian Balakowicz 37283310c549SMarian BalakowiczNew uImage format (FIT) 37293310c549SMarian Balakowicz----------------------- 37303310c549SMarian Balakowicz 37313310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 37323310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 37333310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 37343310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 37353310c549SMarian Balakowicz 37363310c549SMarian Balakowicz 37373310c549SMarian BalakowiczOld uImage format 37383310c549SMarian Balakowicz----------------- 37393310c549SMarian Balakowicz 37403310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 37413310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 37423310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3743c609719bSwdenk 3744c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3745c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3746f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3747f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3748f5ed9e39SPeter Tyser INTEGRITY). 37497b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 3750afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 3751afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 3752c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3753c609719bSwdenk* Load Address 3754c609719bSwdenk* Entry Point 3755c609719bSwdenk* Image Name 3756c609719bSwdenk* Image Timestamp 3757c609719bSwdenk 3758c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3759c609719bSwdenkand the data portions of the image are secured against corruption by 3760c609719bSwdenkCRC32 checksums. 3761c609719bSwdenk 3762c609719bSwdenk 3763c609719bSwdenkLinux Support: 3764c609719bSwdenk============== 3765c609719bSwdenk 3766c609719bSwdenkAlthough U-Boot should support any OS or standalone application 37677152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3768c609719bSwdenkU-Boot. 3769c609719bSwdenk 3770c609719bSwdenkU-Boot includes many features that so far have been part of some 3771c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3772c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3773c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 37747152b1d0Swdenkserves several purposes: 3775c609719bSwdenk 3776c609719bSwdenk- the same features can be used for other OS or standalone 3777c609719bSwdenk applications (for instance: using compressed images to reduce the 3778c609719bSwdenk Flash memory footprint) 3779c609719bSwdenk 3780c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 37817152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 3782c609719bSwdenk 3783c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 3784c609719bSwdenk images; of course this also means that different kernel images can 3785c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 3786c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 3787c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3788c609719bSwdenk software is easier now. 3789c609719bSwdenk 3790c609719bSwdenk 3791c609719bSwdenkLinux HOWTO: 3792c609719bSwdenk============ 3793c609719bSwdenk 3794c609719bSwdenkPorting Linux to U-Boot based systems: 3795c609719bSwdenk--------------------------------------- 3796c609719bSwdenk 3797c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3798c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3799c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3800c609719bSwdenkLinux :-). 3801c609719bSwdenk 3802a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 3803c609719bSwdenk 3804c609719bSwdenkJust make sure your machine specific header file (for instance 3805c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 38061dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 38071dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 38086d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 3809c609719bSwdenk 3810c609719bSwdenk 3811c609719bSwdenkConfiguring the Linux kernel: 3812c609719bSwdenk----------------------------- 3813c609719bSwdenk 3814c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 3815c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 3816c609719bSwdenk 3817c609719bSwdenk 3818c609719bSwdenkBuilding a Linux Image: 3819c609719bSwdenk----------------------- 3820c609719bSwdenk 382124ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 382224ee89b9Swdenknot used. If you use recent kernel source, a new build target 382324ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 382424ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 382524ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 382624ee89b9Swdenk100% compatible format. 3827c609719bSwdenk 3828c609719bSwdenkExample: 3829c609719bSwdenk 3830c609719bSwdenk make TQM850L_config 3831c609719bSwdenk make oldconfig 3832c609719bSwdenk make dep 383324ee89b9Swdenk make uImage 3834c609719bSwdenk 383524ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 383624ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 383724ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 3838c609719bSwdenk 383924ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 384024ee89b9Swdenk 384124ee89b9Swdenk* convert the kernel into a raw binary image: 384224ee89b9Swdenk 384324ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 384424ee89b9Swdenk -R .note -R .comment \ 384524ee89b9Swdenk -S vmlinux linux.bin 384624ee89b9Swdenk 384724ee89b9Swdenk* compress the binary image: 384824ee89b9Swdenk 384924ee89b9Swdenk gzip -9 linux.bin 385024ee89b9Swdenk 385124ee89b9Swdenk* package compressed binary image for U-Boot: 385224ee89b9Swdenk 385324ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 385424ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 385524ee89b9Swdenk -d linux.bin.gz uImage 385624ee89b9Swdenk 385724ee89b9Swdenk 385824ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 385924ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 386024ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 386124ee89b9Swdenkbyte header containing information about target architecture, 386224ee89b9Swdenkoperating system, image type, compression method, entry points, time 386324ee89b9Swdenkstamp, CRC32 checksums, etc. 386424ee89b9Swdenk 386524ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 386624ee89b9Swdenkprint the header information, or to build new images. 3867c609719bSwdenk 3868c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 3869c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 3870c609719bSwdenkchecksum verification: 3871c609719bSwdenk 3872c609719bSwdenk tools/mkimage -l image 3873c609719bSwdenk -l ==> list image header information 3874c609719bSwdenk 3875c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 3876c609719bSwdenkfrom a "data file" which is used as image payload: 3877c609719bSwdenk 3878c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 3879c609719bSwdenk -n name -d data_file image 3880c609719bSwdenk -A ==> set architecture to 'arch' 3881c609719bSwdenk -O ==> set operating system to 'os' 3882c609719bSwdenk -T ==> set image type to 'type' 3883c609719bSwdenk -C ==> set compression type 'comp' 3884c609719bSwdenk -a ==> set load address to 'addr' (hex) 3885c609719bSwdenk -e ==> set entry point to 'ep' (hex) 3886c609719bSwdenk -n ==> set image name to 'name' 3887c609719bSwdenk -d ==> use image data from 'datafile' 3888c609719bSwdenk 388969459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 389069459791Swdenkaddress (0x00000000), but the entry point address depends on the 389169459791Swdenkkernel version: 3892c609719bSwdenk 3893c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 389424ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 3895c609719bSwdenk 3896c609719bSwdenkSo a typical call to build a U-Boot image would read: 3897c609719bSwdenk 389824ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 389924ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 3900a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 390124ee89b9Swdenk > examples/uImage.TQM850L 390224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3903c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3904c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3905c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3906c609719bSwdenk Load Address: 0x00000000 390724ee89b9Swdenk Entry Point: 0x00000000 3908c609719bSwdenk 3909c609719bSwdenkTo verify the contents of the image (or check for corruption): 3910c609719bSwdenk 391124ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 391224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3913c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3914c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3915c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3916c609719bSwdenk Load Address: 0x00000000 391724ee89b9Swdenk Entry Point: 0x00000000 3918c609719bSwdenk 3919c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 3920c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3921c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3922c609719bSwdenkneed to be uncompressed: 3923c609719bSwdenk 3924a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 392524ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 392624ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 3927a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 392824ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 392924ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3930c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3931c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3932c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3933c609719bSwdenk Load Address: 0x00000000 393424ee89b9Swdenk Entry Point: 0x00000000 3935c609719bSwdenk 3936c609719bSwdenk 3937c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3938c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3939c609719bSwdenk 3940c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3941c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3942c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3943c609719bSwdenk Image Name: Simple Ramdisk Image 3944c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3945c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3946c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3947c609719bSwdenk Load Address: 0x00000000 3948c609719bSwdenk Entry Point: 0x00000000 3949c609719bSwdenk 3950c609719bSwdenk 3951c609719bSwdenkInstalling a Linux Image: 3952c609719bSwdenk------------------------- 3953c609719bSwdenk 3954c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3955c609719bSwdenkyou must convert the image to S-Record format: 3956c609719bSwdenk 3957c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3958c609719bSwdenk 3959c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3960c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3961c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3962c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3963c609719bSwdenkcommand. 3964c609719bSwdenk 3965c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3966c609719bSwdenkTQM8xxL is in the first Flash bank): 3967c609719bSwdenk 3968c609719bSwdenk => erase 40100000 401FFFFF 3969c609719bSwdenk 3970c609719bSwdenk .......... done 3971c609719bSwdenk Erased 8 sectors 3972c609719bSwdenk 3973c609719bSwdenk => loads 40100000 3974c609719bSwdenk ## Ready for S-Record download ... 3975c609719bSwdenk ~>examples/image.srec 3976c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3977c609719bSwdenk ... 3978c609719bSwdenk 15989 15990 15991 15992 3979c609719bSwdenk [file transfer complete] 3980c609719bSwdenk [connected] 3981c609719bSwdenk ## Start Addr = 0x00000000 3982c609719bSwdenk 3983c609719bSwdenk 3984c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3985c609719bSwdenkthis includes a checksum verification so you can be sure no data 3986c609719bSwdenkcorruption happened: 3987c609719bSwdenk 3988c609719bSwdenk => imi 40100000 3989c609719bSwdenk 3990c609719bSwdenk ## Checking Image at 40100000 ... 3991c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3992c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3993c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3994c609719bSwdenk Load Address: 00000000 3995c609719bSwdenk Entry Point: 0000000c 3996c609719bSwdenk Verifying Checksum ... OK 3997c609719bSwdenk 3998c609719bSwdenk 3999c609719bSwdenkBoot Linux: 4000c609719bSwdenk----------- 4001c609719bSwdenk 4002c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4003c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4004c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4005c609719bSwdenkparameters. You can check and modify this variable using the 4006c609719bSwdenk"printenv" and "setenv" commands: 4007c609719bSwdenk 4008c609719bSwdenk 4009c609719bSwdenk => printenv bootargs 4010c609719bSwdenk bootargs=root=/dev/ram 4011c609719bSwdenk 4012c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4013c609719bSwdenk 4014c609719bSwdenk => printenv bootargs 4015c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4016c609719bSwdenk 4017c609719bSwdenk => bootm 40020000 4018c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4019c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4020c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4021c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4022c609719bSwdenk Load Address: 00000000 4023c609719bSwdenk Entry Point: 0000000c 4024c609719bSwdenk Verifying Checksum ... OK 4025c609719bSwdenk Uncompressing Kernel Image ... OK 4026c609719bSwdenk 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 4027c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4028c609719bSwdenk time_init: decrementer frequency = 187500000/60 4029c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4030c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4031c609719bSwdenk ... 4032c609719bSwdenk 403311ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 40347152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4035c609719bSwdenkformat!) to the "bootm" command: 4036c609719bSwdenk 4037c609719bSwdenk => imi 40100000 40200000 4038c609719bSwdenk 4039c609719bSwdenk ## Checking Image at 40100000 ... 4040c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4041c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4042c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4043c609719bSwdenk Load Address: 00000000 4044c609719bSwdenk Entry Point: 0000000c 4045c609719bSwdenk Verifying Checksum ... OK 4046c609719bSwdenk 4047c609719bSwdenk ## Checking Image at 40200000 ... 4048c609719bSwdenk Image Name: Simple Ramdisk Image 4049c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4050c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4051c609719bSwdenk Load Address: 00000000 4052c609719bSwdenk Entry Point: 00000000 4053c609719bSwdenk Verifying Checksum ... OK 4054c609719bSwdenk 4055c609719bSwdenk => bootm 40100000 40200000 4056c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4057c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4058c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4059c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4060c609719bSwdenk Load Address: 00000000 4061c609719bSwdenk Entry Point: 0000000c 4062c609719bSwdenk Verifying Checksum ... OK 4063c609719bSwdenk Uncompressing Kernel Image ... OK 4064c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4065c609719bSwdenk Image Name: Simple Ramdisk Image 4066c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4067c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4068c609719bSwdenk Load Address: 00000000 4069c609719bSwdenk Entry Point: 00000000 4070c609719bSwdenk Verifying Checksum ... OK 4071c609719bSwdenk Loading Ramdisk ... OK 4072c609719bSwdenk 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 4073c609719bSwdenk Boot arguments: root=/dev/ram 4074c609719bSwdenk time_init: decrementer frequency = 187500000/60 4075c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4076c609719bSwdenk ... 4077c609719bSwdenk RAMDISK: Compressed image found at block 0 4078c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4079c609719bSwdenk 4080c609719bSwdenk bash# 4081c609719bSwdenk 40820267768eSMatthew McClintockBoot Linux and pass a flat device tree: 40830267768eSMatthew McClintock----------- 40840267768eSMatthew McClintock 40850267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 40860267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 40870267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 40880267768eSMatthew McClintockflat device tree: 40890267768eSMatthew McClintock 40900267768eSMatthew McClintock=> print oftaddr 40910267768eSMatthew McClintockoftaddr=0x300000 40920267768eSMatthew McClintock=> print oft 40930267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 40940267768eSMatthew McClintock=> tftp $oftaddr $oft 40950267768eSMatthew McClintockSpeed: 1000, full duplex 40960267768eSMatthew McClintockUsing TSEC0 device 40970267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 40980267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 40990267768eSMatthew McClintockLoad address: 0x300000 41000267768eSMatthew McClintockLoading: # 41010267768eSMatthew McClintockdone 41020267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 41030267768eSMatthew McClintock=> tftp $loadaddr $bootfile 41040267768eSMatthew McClintockSpeed: 1000, full duplex 41050267768eSMatthew McClintockUsing TSEC0 device 41060267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 41070267768eSMatthew McClintockFilename 'uImage'. 41080267768eSMatthew McClintockLoad address: 0x200000 41090267768eSMatthew McClintockLoading:############ 41100267768eSMatthew McClintockdone 41110267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 41120267768eSMatthew McClintock=> print loadaddr 41130267768eSMatthew McClintockloadaddr=200000 41140267768eSMatthew McClintock=> print oftaddr 41150267768eSMatthew McClintockoftaddr=0x300000 41160267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 41170267768eSMatthew McClintock## Booting image at 00200000 ... 41180267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 41190267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 41200267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 41210267768eSMatthew McClintock Load Address: 00000000 41220267768eSMatthew McClintock Entry Point: 00000000 41230267768eSMatthew McClintock Verifying Checksum ... OK 41240267768eSMatthew McClintock Uncompressing Kernel Image ... OK 41250267768eSMatthew McClintockBooting using flat device tree at 0x300000 41260267768eSMatthew McClintockUsing MPC85xx ADS machine description 41270267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 41280267768eSMatthew McClintock[snip] 41290267768eSMatthew McClintock 41300267768eSMatthew McClintock 41316069ff26SwdenkMore About U-Boot Image Types: 41326069ff26Swdenk------------------------------ 41336069ff26Swdenk 41346069ff26SwdenkU-Boot supports the following image types: 41356069ff26Swdenk 41366069ff26Swdenk "Standalone Programs" are directly runnable in the environment 41376069ff26Swdenk provided by U-Boot; it is expected that (if they behave 41386069ff26Swdenk well) you can continue to work in U-Boot after return from 41396069ff26Swdenk the Standalone Program. 41406069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 41416069ff26Swdenk will take over control completely. Usually these programs 41426069ff26Swdenk will install their own set of exception handlers, device 41436069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 41446069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 41456069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 41466069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 41476069ff26Swdenk being started. 41486069ff26Swdenk "Multi-File Images" contain several images, typically an OS 41496069ff26Swdenk (Linux) kernel image and one or more data images like 41506069ff26Swdenk RAMDisks. This construct is useful for instance when you want 41516069ff26Swdenk to boot over the network using BOOTP etc., where the boot 41526069ff26Swdenk server provides just a single image file, but you want to get 41536069ff26Swdenk for instance an OS kernel and a RAMDisk image. 41546069ff26Swdenk 41556069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 41566069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 41576069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 41586069ff26Swdenk Immediately after the terminating 0 follow the images, one by 41596069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 41606069ff26Swdenk a multiple of 4 bytes). 41616069ff26Swdenk 41626069ff26Swdenk "Firmware Images" are binary images containing firmware (like 41636069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 41646069ff26Swdenk flash memory. 41656069ff26Swdenk 41666069ff26Swdenk "Script files" are command sequences that will be executed by 41676069ff26Swdenk U-Boot's command interpreter; this feature is especially 41686069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 41696069ff26Swdenk as command interpreter. 41706069ff26Swdenk 4171c609719bSwdenk 4172c609719bSwdenkStandalone HOWTO: 4173c609719bSwdenk================= 4174c609719bSwdenk 4175c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4176c609719bSwdenkrun "standalone" applications, which can use some resources of 4177c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4178c609719bSwdenk 4179c609719bSwdenkTwo simple examples are included with the sources: 4180c609719bSwdenk 4181c609719bSwdenk"Hello World" Demo: 4182c609719bSwdenk------------------- 4183c609719bSwdenk 4184c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4185c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4186c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4187c609719bSwdenklike that: 4188c609719bSwdenk 4189c609719bSwdenk => loads 4190c609719bSwdenk ## Ready for S-Record download ... 4191c609719bSwdenk ~>examples/hello_world.srec 4192c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4193c609719bSwdenk [file transfer complete] 4194c609719bSwdenk [connected] 4195c609719bSwdenk ## Start Addr = 0x00040004 4196c609719bSwdenk 4197c609719bSwdenk => go 40004 Hello World! This is a test. 4198c609719bSwdenk ## Starting application at 0x00040004 ... 4199c609719bSwdenk Hello World 4200c609719bSwdenk argc = 7 4201c609719bSwdenk argv[0] = "40004" 4202c609719bSwdenk argv[1] = "Hello" 4203c609719bSwdenk argv[2] = "World!" 4204c609719bSwdenk argv[3] = "This" 4205c609719bSwdenk argv[4] = "is" 4206c609719bSwdenk argv[5] = "a" 4207c609719bSwdenk argv[6] = "test." 4208c609719bSwdenk argv[7] = "<NULL>" 4209c609719bSwdenk Hit any key to exit ... 4210c609719bSwdenk 4211c609719bSwdenk ## Application terminated, rc = 0x0 4212c609719bSwdenk 4213c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4214c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4215c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4216c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4217c609719bSwdenkcharacter, but this is just a demo program. The application can be 4218c609719bSwdenkcontrolled by the following keys: 4219c609719bSwdenk 4220c609719bSwdenk ? - print current values og the CPM Timer registers 4221c609719bSwdenk b - enable interrupts and start timer 4222c609719bSwdenk e - stop timer and disable interrupts 4223c609719bSwdenk q - quit application 4224c609719bSwdenk 4225c609719bSwdenk => loads 4226c609719bSwdenk ## Ready for S-Record download ... 4227c609719bSwdenk ~>examples/timer.srec 4228c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4229c609719bSwdenk [file transfer complete] 4230c609719bSwdenk [connected] 4231c609719bSwdenk ## Start Addr = 0x00040004 4232c609719bSwdenk 4233c609719bSwdenk => go 40004 4234c609719bSwdenk ## Starting application at 0x00040004 ... 4235c609719bSwdenk TIMERS=0xfff00980 4236c609719bSwdenk Using timer 1 4237c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4238c609719bSwdenk 4239c609719bSwdenkHit 'b': 4240c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4241c609719bSwdenk Enabling timer 4242c609719bSwdenkHit '?': 4243c609719bSwdenk [q, b, e, ?] ........ 4244c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4245c609719bSwdenkHit '?': 4246c609719bSwdenk [q, b, e, ?] . 4247c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4248c609719bSwdenkHit '?': 4249c609719bSwdenk [q, b, e, ?] . 4250c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4251c609719bSwdenkHit '?': 4252c609719bSwdenk [q, b, e, ?] . 4253c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4254c609719bSwdenkHit 'e': 4255c609719bSwdenk [q, b, e, ?] ...Stopping timer 4256c609719bSwdenkHit 'q': 4257c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4258c609719bSwdenk 4259c609719bSwdenk 426085ec0bccSwdenkMinicom warning: 426185ec0bccSwdenk================ 426285ec0bccSwdenk 42637152b1d0SwdenkOver time, many people have reported problems when trying to use the 426485ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 426585ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4266f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 426785ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 426885ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 426985ec0bccSwdenk 427052f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 427152f52c14Swdenkconfiguration to your "File transfer protocols" section: 427252f52c14Swdenk 427352f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 427452f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 427552f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 427652f52c14Swdenk 427752f52c14Swdenk 4278c609719bSwdenkNetBSD Notes: 4279c609719bSwdenk============= 4280c609719bSwdenk 4281c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4282c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4283c609719bSwdenk 4284c609719bSwdenkBuilding requires a cross environment; it is known to work on 4285c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4286c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4287c609719bSwdenkNote that the cross-powerpc package does not install include files; 4288c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4289c609719bSwdenkmissing. This file has to be installed and patched manually: 4290c609719bSwdenk 4291c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4292c609719bSwdenk # mkdir powerpc 4293c609719bSwdenk # ln -s powerpc machine 4294c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4295c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4296c609719bSwdenk 4297c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4298c609719bSwdenkand U-Boot include files. 4299c609719bSwdenk 4300c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4301c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4302c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4303c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 43042a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4305c609719bSwdenk 4306c609719bSwdenk 4307c609719bSwdenkImplementation Internals: 4308c609719bSwdenk========================= 4309c609719bSwdenk 4310c609719bSwdenkThe following is not intended to be a complete description of every 4311c609719bSwdenkimplementation detail. However, it should help to understand the 4312c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4313c609719bSwdenkhardware. 4314c609719bSwdenk 4315c609719bSwdenk 4316c609719bSwdenkInitial Stack, Global Data: 4317c609719bSwdenk--------------------------- 4318c609719bSwdenk 4319c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4320c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4321c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4322c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4323c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4324c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4325c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4326c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4327c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4328c609719bSwdenklocked as (mis-) used as memory, etc. 4329c609719bSwdenk 43307152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 43310668236bSWolfgang Denk U-Boot mailing list: 433243d9616cSwdenk 433343d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 433443d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 433543d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 433643d9616cSwdenk ... 433743d9616cSwdenk 433843d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 433943d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 434043d9616cSwdenk require any physical RAM backing up the cache. The cleverness 434143d9616cSwdenk is that the cache is being used as a temporary supply of 434243d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 434311ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 434443d9616cSwdenk can see how this works by studying the cache architecture and 434543d9616cSwdenk operation in the architecture and processor-specific manuals. 434643d9616cSwdenk 434743d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 434843d9616cSwdenk is another option for the system designer to use as an 434911ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 435043d9616cSwdenk option should work for you. Using CS 4 should be fine if your 435143d9616cSwdenk board designers haven't used it for something that would 435243d9616cSwdenk cause you grief during the initial boot! It is frequently not 435343d9616cSwdenk used. 435443d9616cSwdenk 43556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 435643d9616cSwdenk with your processor/board/system design. The default value 435743d9616cSwdenk you will find in any recent u-boot distribution in 43588a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 435943d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 436043d9616cSwdenk it above 400_0000. Just make sure your board has no resources 436143d9616cSwdenk that are supposed to respond to that address! That code in 436243d9616cSwdenk start.S has been around a while and should work as is when 436343d9616cSwdenk you get the config right. 436443d9616cSwdenk 436543d9616cSwdenk -Chris Hallinan 436643d9616cSwdenk DS4.COM, Inc. 436743d9616cSwdenk 4368c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4369c609719bSwdenkcode for the initialization procedures: 4370c609719bSwdenk 4371c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4372c609719bSwdenk to write it. 4373c609719bSwdenk 437411ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4375c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 43767152b1d0Swdenk zation is performed later (when relocating to RAM). 4377c609719bSwdenk 4378c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4379c609719bSwdenk that. 4380c609719bSwdenk 4381c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4382c609719bSwdenknormal global data to share information beween the code. But it 4383c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4384c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4385c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4386c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4387c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4388c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4389c609719bSwdenkreserve for this purpose. 4390c609719bSwdenk 43917152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4392c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4393c609719bSwdenkGCC's implementation. 4394c609719bSwdenk 4395c609719bSwdenkFor PowerPC, the following registers have specific use: 4396c609719bSwdenk R1: stack pointer 4397e7670f6cSWolfgang Denk R2: reserved for system use 4398c609719bSwdenk R3-R4: parameter passing and return values 4399c609719bSwdenk R5-R10: parameter passing 4400c609719bSwdenk R13: small data area pointer 4401c609719bSwdenk R30: GOT pointer 4402c609719bSwdenk R31: frame pointer 4403c609719bSwdenk 4404e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4405e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4406e6bee808SJoakim Tjernlund going back and forth between asm and C) 4407c609719bSwdenk 4408e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4409c609719bSwdenk 4410c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4411c609719bSwdenk address of the global data structure is known at compile time), 4412c609719bSwdenk but it turned out that reserving a register results in somewhat 4413c609719bSwdenk smaller code - although the code savings are not that big (on 4414c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4415c609719bSwdenk 624 text + 127 data). 4416c609719bSwdenk 4417c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 44184c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 44194c58eb55SMike Frysinger 4420c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 44214c58eb55SMike Frysinger 4422c609719bSwdenkOn ARM, the following registers are used: 4423c609719bSwdenk 4424c609719bSwdenk R0: function argument word/integer result 4425c609719bSwdenk R1-R3: function argument word 4426c609719bSwdenk R9: GOT pointer 4427c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4428c609719bSwdenk R11: argument (frame) pointer 4429c609719bSwdenk R12: temporary workspace 4430c609719bSwdenk R13: stack pointer 4431c609719bSwdenk R14: link register 4432c609719bSwdenk R15: program counter 4433c609719bSwdenk 4434c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4435c609719bSwdenk 44360df01fd3SThomas ChouOn Nios II, the ABI is documented here: 44370df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 44380df01fd3SThomas Chou 44390df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 44400df01fd3SThomas Chou 44410df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 44420df01fd3SThomas Chou to access small data sections, so gp is free. 44430df01fd3SThomas Chou 4444afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4445afc1ce82SMacpaul Lin 4446afc1ce82SMacpaul Lin R0-R1: argument/return 4447afc1ce82SMacpaul Lin R2-R5: argument 4448afc1ce82SMacpaul Lin R15: temporary register for assembler 4449afc1ce82SMacpaul Lin R16: trampoline register 4450afc1ce82SMacpaul Lin R28: frame pointer (FP) 4451afc1ce82SMacpaul Lin R29: global pointer (GP) 4452afc1ce82SMacpaul Lin R30: link register (LP) 4453afc1ce82SMacpaul Lin R31: stack pointer (SP) 4454afc1ce82SMacpaul Lin PC: program counter (PC) 4455afc1ce82SMacpaul Lin 4456afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4457afc1ce82SMacpaul Lin 4458d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4459d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4460c609719bSwdenk 4461c609719bSwdenkMemory Management: 4462c609719bSwdenk------------------ 4463c609719bSwdenk 4464c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4465c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4466c609719bSwdenk 4467c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4468c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4469c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4470c609719bSwdenkphysical memory banks. 4471c609719bSwdenk 4472c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4473c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4474c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4475c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 44766d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4477c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4478c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4479c609719bSwdenk 4480c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4481c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4482c609719bSwdenk 4483c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4484c609719bSwdenkthis: 4485c609719bSwdenk 4486c609719bSwdenk 0x0000 0000 Exception Vector code 4487c609719bSwdenk : 4488c609719bSwdenk 0x0000 1FFF 4489c609719bSwdenk 0x0000 2000 Free for Application Use 4490c609719bSwdenk : 4491c609719bSwdenk : 4492c609719bSwdenk 4493c609719bSwdenk : 4494c609719bSwdenk : 4495c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4496c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4497c609719bSwdenk 0x00FC 0000 Malloc Arena 4498c609719bSwdenk : 4499c609719bSwdenk 0x00FD FFFF 4500c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4501c609719bSwdenk ... eventually: LCD or video framebuffer 4502c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4503c609719bSwdenk 0x00FF FFFF [End of RAM] 4504c609719bSwdenk 4505c609719bSwdenk 4506c609719bSwdenkSystem Initialization: 4507c609719bSwdenk---------------------- 4508c609719bSwdenk 4509c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 451011ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4511c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 45127152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4513c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4514c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4515c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4516c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4517c609719bSwdenkthe caches and the SIU. 4518c609719bSwdenk 4519c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4520c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4521c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4522c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4523c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4524c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4525c609719bSwdenkbanks. 4526c609719bSwdenk 4527c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 45287152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4529c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4530c609719bSwdenk0x00000000, with any additional banks following immediately to create 4531c609719bSwdenkcontiguous memory starting from 0. 4532c609719bSwdenk 4533c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4534c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4535c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4536c609719bSwdenkpages, and the final stack is set up. 4537c609719bSwdenk 4538c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4539c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4540c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4541c609719bSwdenknew address in RAM. 4542c609719bSwdenk 4543c609719bSwdenk 4544c609719bSwdenkU-Boot Porting Guide: 4545c609719bSwdenk---------------------- 4546c609719bSwdenk 4547c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 45486aff3115Swdenklist, October 2002] 4549c609719bSwdenk 4550c609719bSwdenk 4551c609719bSwdenkint main(int argc, char *argv[]) 4552c609719bSwdenk{ 4553c609719bSwdenk sighandler_t no_more_time; 4554c609719bSwdenk 4555c609719bSwdenk signal(SIGALRM, no_more_time); 4556c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4557c609719bSwdenk 4558c609719bSwdenk if (available_money > available_manpower) { 45596c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4560c609719bSwdenk return 0; 4561c609719bSwdenk } 4562c609719bSwdenk 4563c609719bSwdenk Download latest U-Boot source; 4564c609719bSwdenk 45650668236bSWolfgang Denk Subscribe to u-boot mailing list; 45666aff3115Swdenk 45676c3fef28SJerry Van Baren if (clueless) 4568c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4569c609719bSwdenk 4570c609719bSwdenk while (learning) { 4571c609719bSwdenk Read the README file in the top level directory; 45727cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 45736c3fef28SJerry Van Baren Read applicable doc/*.README; 4574c609719bSwdenk Read the source, Luke; 45756c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4576c609719bSwdenk } 4577c609719bSwdenk 45786c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 45796c3fef28SJerry Van Baren Buy a BDI3000; 45806c3fef28SJerry Van Baren else 4581c609719bSwdenk Add a lot of aggravation and time; 4582c609719bSwdenk 45836c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 45846c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 45856c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 45866c3fef28SJerry Van Baren } else { 4587c609719bSwdenk Create your own board support subdirectory; 45886c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 45896c3fef28SJerry Van Baren } 45906c3fef28SJerry Van Baren Edit new board/<myboard> files 45916c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4592c609719bSwdenk 45936c3fef28SJerry Van Baren while (!accepted) { 4594c609719bSwdenk while (!running) { 4595c609719bSwdenk do { 4596c609719bSwdenk Add / modify source code; 4597c609719bSwdenk } until (compiles); 4598c609719bSwdenk Debug; 4599c609719bSwdenk if (clueless) 4600c609719bSwdenk email("Hi, I am having problems..."); 4601c609719bSwdenk } 46026c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 46036c3fef28SJerry Van Baren if (reasonable critiques) 46046c3fef28SJerry Van Baren Incorporate improvements from email list code review; 46056c3fef28SJerry Van Baren else 46066c3fef28SJerry Van Baren Defend code as written; 46076c3fef28SJerry Van Baren } 4608c609719bSwdenk 4609c609719bSwdenk return 0; 4610c609719bSwdenk} 4611c609719bSwdenk 4612c609719bSwdenkvoid no_more_time (int sig) 4613c609719bSwdenk{ 4614c609719bSwdenk hire_a_guru(); 4615c609719bSwdenk} 4616c609719bSwdenk 4617c609719bSwdenk 4618c609719bSwdenkCoding Standards: 4619c609719bSwdenk----------------- 4620c609719bSwdenk 4621c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 46222c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 46237ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 4624c609719bSwdenk 46252c051651SDetlev ZundelSource files originating from a different project (for example the 46262c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 46272c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 46282c051651SDetlev Zundelsources. 46292c051651SDetlev Zundel 46302c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 46312c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 46322c051651SDetlev Zundelin your code. 4633c609719bSwdenk 4634c178d3daSwdenkPlease also stick to the following formatting rules: 4635180d3f74Swdenk- remove any trailing white space 46367ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 4637180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 46387ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 4639180d3f74Swdenk- do not add trailing empty lines to source files 4640180d3f74Swdenk 4641c609719bSwdenkSubmissions which do not conform to the standards may be returned 4642c609719bSwdenkwith a request to reformat the changes. 4643c609719bSwdenk 4644c609719bSwdenk 4645c609719bSwdenkSubmitting Patches: 4646c609719bSwdenk------------------- 4647c609719bSwdenk 4648c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4649c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4650c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4651c609719bSwdenk 46520d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4653218ca724SWolfgang Denk 46540668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 46550668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 46560668236bSWolfgang Denk 4657c609719bSwdenkWhen you send a patch, please include the following information with 4658c609719bSwdenkit: 4659c609719bSwdenk 4660c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4661c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4662c609719bSwdenk patch actually fixes something. 4663c609719bSwdenk 4664c609719bSwdenk* For new features: a description of the feature and your 4665c609719bSwdenk implementation. 4666c609719bSwdenk 4667c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4668c609719bSwdenk 4669c609719bSwdenk* For major contributions, your entry to the CREDITS file 4670c609719bSwdenk 4671c609719bSwdenk* When you add support for a new board, don't forget to add this 46727ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 4673c609719bSwdenk 4674c609719bSwdenk* If your patch adds new configuration options, don't forget to 4675c609719bSwdenk document these in the README file. 4676c609719bSwdenk 4677218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4678218ca724SWolfgang Denk recommended) you can easily generate the patch using the 46797ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 4680218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4681218ca724SWolfgang Denk with some other mail clients. 4682c609719bSwdenk 4683218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4684218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4685218ca724SWolfgang Denk GNU diff. 46866dff5529Swdenk 4687218ca724SWolfgang Denk The current directory when running this command shall be the parent 4688218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4689218ca724SWolfgang Denk your patch includes sufficient directory information for the 4690218ca724SWolfgang Denk affected files). 4691218ca724SWolfgang Denk 4692218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4693218ca724SWolfgang Denk and compressed attachments must not be used. 4694c609719bSwdenk 469552f52c14Swdenk* If one logical set of modifications affects or creates several 469652f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 469752f52c14Swdenk 469852f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 469952f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 470052f52c14Swdenk 470152f52c14Swdenk 4702c609719bSwdenkNotes: 4703c609719bSwdenk 4704c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4705c609719bSwdenk source tree and make sure that no errors or warnings are reported 4706c609719bSwdenk for any of the boards. 4707c609719bSwdenk 4708c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4709c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4710c609719bSwdenk returned with a request to re-formatting / split it. 4711c609719bSwdenk 4712c609719bSwdenk* If you modify existing code, make sure that your new code does not 4713c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4714c609719bSwdenk When adding new features, these should compile conditionally only 4715c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4716c609719bSwdenk disabled must not need more memory than the old code without your 4717c609719bSwdenk modification. 471890dc6704Swdenk 47190668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 47200668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 47210668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 47220668236bSWolfgang Denk bigger than the size limit should be avoided. 4723