1c609719bSwdenk# 2cccfc2abSDetlev Zundel# (C) Copyright 2000 - 2009 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 1508d321b81SPeter Tyser /at91rm9200 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 1678d321b81SPeter Tyser /i386 Files generic to i386 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 1838d321b81SPeter Tyser /lib Architecture specific library files 1848d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1858d321b81SPeter Tyser /cpu CPU specific files 1868d321b81SPeter Tyser /lib Architecture specific library files 187a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1888d321b81SPeter Tyser /cpu CPU specific files 1898d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1908d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1918d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1928d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1938d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 1948d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 1958d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 1968d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 1978d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 1988d321b81SPeter Tyser /lib Architecture specific library files 1998d321b81SPeter Tyser /sh Files generic to SH architecture 2008d321b81SPeter Tyser /cpu CPU specific files 2018d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 2028d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 2038d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 2048d321b81SPeter Tyser /lib Architecture specific library files 2058d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2068d321b81SPeter Tyser /cpu CPU specific files 2078d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2088d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2098d321b81SPeter Tyser /lib Architecture specific library files 2108d321b81SPeter Tyser/api Machine/arch independent API for external apps 2118d321b81SPeter Tyser/board Board dependent files 2128d321b81SPeter Tyser/common Misc architecture independent functions 2138d321b81SPeter Tyser/disk Code for disk drive partition handling 2148d321b81SPeter Tyser/doc Documentation (don't expect too much) 2158d321b81SPeter Tyser/drivers Commonly used device drivers 2168d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2178d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2188d321b81SPeter Tyser/include Header Files 2198d321b81SPeter Tyser/lib Files generic to all architectures 2208d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2218d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2228d321b81SPeter Tyser /lzo Library files to support LZO decompression 2238d321b81SPeter Tyser/net Networking code 2248d321b81SPeter Tyser/post Power On Self Test 2258d321b81SPeter Tyser/rtc Real Time Clock drivers 2268d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 227c609719bSwdenk 228c609719bSwdenkSoftware Configuration: 229c609719bSwdenk======================= 230c609719bSwdenk 231c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 232c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 233c609719bSwdenk 234c609719bSwdenkThere are two classes of configuration variables: 235c609719bSwdenk 236c609719bSwdenk* Configuration _OPTIONS_: 237c609719bSwdenk These are selectable by the user and have names beginning with 238c609719bSwdenk "CONFIG_". 239c609719bSwdenk 240c609719bSwdenk* Configuration _SETTINGS_: 241c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 242c609719bSwdenk you don't know what you're doing; they have names beginning with 2436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 244c609719bSwdenk 245c609719bSwdenkLater we will add a configuration tool - probably similar to or even 246c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 247c609719bSwdenkdo the configuration by hand, which means creating some symbolic 248c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 249c609719bSwdenkas an example here. 250c609719bSwdenk 251c609719bSwdenk 252c609719bSwdenkSelection of Processor Architecture and Board Type: 253c609719bSwdenk--------------------------------------------------- 254c609719bSwdenk 255c609719bSwdenkFor all supported boards there are ready-to-use default 256c609719bSwdenkconfigurations available; just type "make <board_name>_config". 257c609719bSwdenk 258c609719bSwdenkExample: For a TQM823L module type: 259c609719bSwdenk 260c609719bSwdenk cd u-boot 261c609719bSwdenk make TQM823L_config 262c609719bSwdenk 26311ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 264c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 265c609719bSwdenkdirectory according to the instructions in cogent/README. 266c609719bSwdenk 267c609719bSwdenk 268c609719bSwdenkConfiguration Options: 269c609719bSwdenk---------------------- 270c609719bSwdenk 271c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 272c609719bSwdenksuch information is kept in a configuration file 273c609719bSwdenk"include/configs/<board_name>.h". 274c609719bSwdenk 275c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 276c609719bSwdenk"include/configs/TQM823L.h". 277c609719bSwdenk 278c609719bSwdenk 2797f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2807f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2817f6c2cbcSwdenkbuild a config tool - later. 2827f6c2cbcSwdenk 2837f6c2cbcSwdenk 284c609719bSwdenkThe following options need to be configured: 285c609719bSwdenk 2862628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 287c609719bSwdenk 2882628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2896ccec449SWolfgang Denk 2906ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 29109ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 292c609719bSwdenk 293c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 294c609719bSwdenk Define exactly one of 295c609719bSwdenk CONFIG_CMA286_60_OLD 296c609719bSwdenk--- FIXME --- not tested yet: 297c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 298c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 299c609719bSwdenk 300c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 301c609719bSwdenk Define exactly one of 302c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 303c609719bSwdenk 304c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 305c609719bSwdenk Define one or more of 306c609719bSwdenk CONFIG_CMA302 307c609719bSwdenk 308c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 309c609719bSwdenk Define one or more of 310c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 31111ccc33fSMarcel Ziswiler the LCD display every second with 312c609719bSwdenk a "rotator" |\-/|\-/ 313c609719bSwdenk 3142535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3152535d602Swdenk CONFIG_ADSTYPE 3162535d602Swdenk Possible values are: 3176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3212535d602Swdenk 322c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 323c609719bSwdenk Define exactly one of 324c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 325c609719bSwdenk 32611ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 32766ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 32866ca92a5Swdenk get_gclk_freq() cannot work 3295da627a4Swdenk e.g. if there is no 32KHz 3305da627a4Swdenk reference PIT/RTC clock 33166ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 33266ca92a5Swdenk or XTAL/EXTAL) 333c609719bSwdenk 33466ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 33766ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 33875d1ea7fSwdenk See doc/README.MPC866 33975d1ea7fSwdenk 3406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 34175d1ea7fSwdenk 34275d1ea7fSwdenk Define this to measure the actual CPU clock instead 34375d1ea7fSwdenk of relying on the correctness of the configured 34475d1ea7fSwdenk values. Mostly useful for board bringup to make sure 34575d1ea7fSwdenk the PLL is locked at the intended frequency. Note 34675d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 34875d1ea7fSwdenk 349506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 350506f3918SHeiko Schocher 351506f3918SHeiko Schocher Define this option if you want to enable the 352506f3918SHeiko Schocher ICache only when Code runs from RAM. 353506f3918SHeiko Schocher 3540b953ffcSMarkus Klotzbuecher- Intel Monahans options: 3556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 3560b953ffcSMarkus Klotzbuecher 3570b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 3580b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 3590b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 3600b953ffcSMarkus Klotzbuecher 3616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 3620b953ffcSMarkus Klotzbuecher 3630b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 3640b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 3650b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 3660b953ffcSMarkus Klotzbuecher by this value. 3670b953ffcSMarkus Klotzbuecher 3685da627a4Swdenk- Linux Kernel Interface: 369c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 370c609719bSwdenk 371c609719bSwdenk U-Boot stores all clock information in Hz 372c609719bSwdenk internally. For binary compatibility with older Linux 373c609719bSwdenk kernels (which expect the clocks passed in the 374c609719bSwdenk bd_info data to be in MHz) the environment variable 375c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 376c609719bSwdenk converts clock data to MHZ before passing it to the 377c609719bSwdenk Linux kernel. 378c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 379c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 380c609719bSwdenk default environment. 381c609719bSwdenk 3825da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 3835da627a4Swdenk 38411ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 3855da627a4Swdenk expect it to be in bytes, others in MB. 3865da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 3875da627a4Swdenk 388fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 389f57f70aaSWolfgang Denk 390f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 391213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 392213bf8c8SGerald Van Baren concepts). 393213bf8c8SGerald Van Baren 394213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 395213bf8c8SGerald Van Baren * New libfdt-based support 396213bf8c8SGerald Van Baren * Adds the "fdt" command 3973bb342fcSKim Phillips * The bootm command automatically updates the fdt 398213bf8c8SGerald Van Baren 399b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 400b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 401b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 402b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 403f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 404c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 405f57f70aaSWolfgang Denk 40611ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 40711ccc33fSMarcel Ziswiler addresses 4083bb342fcSKim Phillips 4094e253137SKumar Gala CONFIG_OF_BOARD_SETUP 4104e253137SKumar Gala 4114e253137SKumar Gala Board code has addition modification that it wants to make 4124e253137SKumar Gala to the flat device tree before handing it off to the kernel 4136705d81eSwdenk 4140267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 4150267768eSMatthew McClintock 41611ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 4170267768eSMatthew McClintock param header, the default value is zero if undefined. 4180267768eSMatthew McClintock 4193887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 4203887c3fbSHeiko Schocher 4213887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 4223887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 4233887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 4243887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 4253887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 4263887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 4273887c3fbSHeiko Schocher 4280b2f4ecaSNiklaus Giger- vxWorks boot parameters: 4290b2f4ecaSNiklaus Giger 4300b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 4310b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 4320b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 4330b2f4ecaSNiklaus Giger 4340b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 4350b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 4360b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 4370b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 4380b2f4ecaSNiklaus Giger 4390b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 4400b2f4ecaSNiklaus Giger 4410b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 4420b2f4ecaSNiklaus Giger 4430b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 4440b2f4ecaSNiklaus Giger the defaults discussed just above. 4450b2f4ecaSNiklaus Giger 4466705d81eSwdenk- Serial Ports: 44748d0192fSAndreas Engel CONFIG_PL010_SERIAL 4486705d81eSwdenk 4496705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 4506705d81eSwdenk 45148d0192fSAndreas Engel CONFIG_PL011_SERIAL 4526705d81eSwdenk 4536705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 4546705d81eSwdenk 4556705d81eSwdenk CONFIG_PL011_CLOCK 4566705d81eSwdenk 4576705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 4586705d81eSwdenk the clock speed of the UARTs. 4596705d81eSwdenk 4606705d81eSwdenk CONFIG_PL01x_PORTS 4616705d81eSwdenk 4626705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 4636705d81eSwdenk define this to a list of base addresses for each (supported) 4646705d81eSwdenk port. See e.g. include/configs/versatile.h 4656705d81eSwdenk 4666705d81eSwdenk 467c609719bSwdenk- Console Interface: 468c609719bSwdenk Depending on board, define exactly one serial port 469c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 470c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 471c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 472c609719bSwdenk 473c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 474c609719bSwdenk port routines must be defined elsewhere 475c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 476c609719bSwdenk 477c609719bSwdenk CONFIG_CFB_CONSOLE 478c609719bSwdenk Enables console device for a color framebuffer. Needs following 479c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 480c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 481c609719bSwdenk (default big endian) 482c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 483c609719bSwdenk rectangle fill 484c609719bSwdenk (cf. smiLynxEM) 485c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 486c609719bSwdenk bit-blit (cf. smiLynxEM) 487c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 488c609719bSwdenk (cols=pitch) 489c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 490c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 491c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 492c609719bSwdenk (0-5, cf. cfb_console.c) 493c609719bSwdenk VIDEO_FB_ADRS framebuffer address 494c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 495c609719bSwdenk (i.e. i8042_kbd_init()) 496c609719bSwdenk VIDEO_TSTC_FCT test char fct 497c609719bSwdenk (i.e. i8042_tstc) 498c609719bSwdenk VIDEO_GETC_FCT get char fct 499c609719bSwdenk (i.e. i8042_getc) 500c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 501c609719bSwdenk (requires blink timer 502c609719bSwdenk cf. i8042.c) 5036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 504c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 505c609719bSwdenk upper right corner 506602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 507c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 508c609719bSwdenk upper left corner 509a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 510a6c7ad2fSwdenk linux_logo.h for logo. 511a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 512c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 51311ccc33fSMarcel Ziswiler additional board info beside 514c609719bSwdenk the logo 515c609719bSwdenk 516c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 517c609719bSwdenk default i/o. Serial console can be forced with 518c609719bSwdenk environment 'console=serial'. 519c609719bSwdenk 520a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 521a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 522a3ad8e26Swdenk the "silent" environment variable. See 523a3ad8e26Swdenk doc/README.silent for more information. 524a3ad8e26Swdenk 525c609719bSwdenk- Console Baudrate: 526c609719bSwdenk CONFIG_BAUDRATE - in bps 527c609719bSwdenk Select one of the baudrates listed in 5286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 5296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 530c609719bSwdenk 531c92fac91SHeiko Schocher- Console Rx buffer length 532c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 533c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 5342b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 535c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 536c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 537c92fac91SHeiko Schocher the SMC. 538c92fac91SHeiko Schocher 539c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 540c609719bSwdenk Delay before automatically booting the default image; 541c609719bSwdenk set to -1 to disable autoboot. 542c609719bSwdenk 543c609719bSwdenk See doc/README.autoboot for these options that 544c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 545c609719bSwdenk CONFIG_BOOT_RETRY_TIME 546c609719bSwdenk CONFIG_BOOT_RETRY_MIN 547c609719bSwdenk CONFIG_AUTOBOOT_KEYED 548c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 549c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 550c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 551c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 552c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 553c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 554c609719bSwdenk CONFIG_RESET_TO_RETRY 555c609719bSwdenk 556c609719bSwdenk- Autoboot Command: 557c609719bSwdenk CONFIG_BOOTCOMMAND 558c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 559c609719bSwdenk define a command string that is automatically executed 560c609719bSwdenk when no character is read on the console interface 561c609719bSwdenk within "Boot Delay" after reset. 562c609719bSwdenk 563c609719bSwdenk CONFIG_BOOTARGS 564c609719bSwdenk This can be used to pass arguments to the bootm 565c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 566c609719bSwdenk environment value "bootargs". 567c609719bSwdenk 568c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 569c609719bSwdenk The value of these goes into the environment as 570c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 571c609719bSwdenk as a convenience, when switching between booting from 57211ccc33fSMarcel Ziswiler RAM and NFS. 573c609719bSwdenk 574c609719bSwdenk- Pre-Boot Commands: 575c609719bSwdenk CONFIG_PREBOOT 576c609719bSwdenk 577c609719bSwdenk When this option is #defined, the existence of the 578c609719bSwdenk environment variable "preboot" will be checked 579c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 580c609719bSwdenk countdown and/or running the auto-boot command resp. 581c609719bSwdenk entering interactive mode. 582c609719bSwdenk 583c609719bSwdenk This feature is especially useful when "preboot" is 584c609719bSwdenk automatically generated or modified. For an example 585c609719bSwdenk see the LWMON board specific code: here "preboot" is 586c609719bSwdenk modified when the user holds down a certain 587c609719bSwdenk combination of keys on the (special) keyboard when 588c609719bSwdenk booting the systems 589c609719bSwdenk 590c609719bSwdenk- Serial Download Echo Mode: 591c609719bSwdenk CONFIG_LOADS_ECHO 592c609719bSwdenk If defined to 1, all characters received during a 593c609719bSwdenk serial download (using the "loads" command) are 594c609719bSwdenk echoed back. This might be needed by some terminal 595c609719bSwdenk emulations (like "cu"), but may as well just take 596c609719bSwdenk time on others. This setting #define's the initial 597c609719bSwdenk value of the "loads_echo" environment variable. 598c609719bSwdenk 599602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 600c609719bSwdenk CONFIG_KGDB_BAUDRATE 601c609719bSwdenk Select one of the baudrates listed in 6026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 603c609719bSwdenk 604c609719bSwdenk- Monitor Functions: 605602ad3b3SJon Loeliger Monitor commands can be included or excluded 606602ad3b3SJon Loeliger from the build by using the #include files 607602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 608602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 609602ad3b3SJon Loeliger and augmenting with additional #define's 610602ad3b3SJon Loeliger for wanted commands. 611c609719bSwdenk 612602ad3b3SJon Loeliger The default command configuration includes all commands 613602ad3b3SJon Loeliger except those marked below with a "*". 614602ad3b3SJon Loeliger 615602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 616602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 617602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 618602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 619602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 620602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 621602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 622602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 623602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 624602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 625602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 626a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 627a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 628a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 629a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 630602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 631602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 632246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 633602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 634602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 635bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 636602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 637602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 638602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 639602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 640602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 641602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 642602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 643602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 644602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 645602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 646602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 647602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 648602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 649602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 650602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 651602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 652602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 65302c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 65402c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 655602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 65656523f12Swdenk loop, loopw, mtest 657602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 658602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 659602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 66068d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 661602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 662602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 663e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 664e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 665602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 666602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 667602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 668602ad3b3SJon Loeliger host 669602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 670602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 671602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 672602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 673602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 674602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 675602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 676602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 677602ad3b3SJon Loeliger (4xx only) 678c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 67902c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 68074de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 681602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 682602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 683602ad3b3SJon Loeliger CONFIG_CMD_VFD * VFD support (TRAB) 684602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 685602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 686c609719bSwdenk 687c609719bSwdenk 688c609719bSwdenk EXAMPLE: If you want all functions except of network 689c609719bSwdenk support you can write: 690c609719bSwdenk 691602ad3b3SJon Loeliger #include "config_cmd_all.h" 692602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 693c609719bSwdenk 694213bf8c8SGerald Van Baren Other Commands: 695213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 696c609719bSwdenk 697c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 698602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 699c609719bSwdenk what you (and your U-Boot users) are doing. Data 700c609719bSwdenk cache cannot be enabled on systems like the 8xx or 701c609719bSwdenk 8260 (where accesses to the IMMR region must be 702c609719bSwdenk uncached), and it cannot be disabled on all other 703c609719bSwdenk systems where we (mis-) use the data cache to hold an 704c609719bSwdenk initial stack and some data. 705c609719bSwdenk 706c609719bSwdenk 707c609719bSwdenk XXX - this list needs to get updated! 708c609719bSwdenk 709c609719bSwdenk- Watchdog: 710c609719bSwdenk CONFIG_WATCHDOG 711c609719bSwdenk If this variable is defined, it enables watchdog 7127152b1d0Swdenk support. There must be support in the platform specific 713c609719bSwdenk code for a watchdog. For the 8xx and 8260 CPUs, the 714c609719bSwdenk SIU Watchdog feature is enabled in the SYPCR 715c609719bSwdenk register. 716c609719bSwdenk 717c1551ea8Sstroese- U-Boot Version: 718c1551ea8Sstroese CONFIG_VERSION_VARIABLE 719c1551ea8Sstroese If this variable is defined, an environment variable 720c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 721c1551ea8Sstroese version as printed by the "version" command. 722c1551ea8Sstroese This variable is readonly. 723c1551ea8Sstroese 724c609719bSwdenk- Real-Time Clock: 725c609719bSwdenk 726602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 727c609719bSwdenk has to be selected, too. Define exactly one of the 728c609719bSwdenk following options: 729c609719bSwdenk 730c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 731c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 7327ce63709SGuennadi Liakhovetski CONFIG_RTC_MC13783 - use MC13783 RTC 733c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 7341cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 735c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 7367f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 7373bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 7389536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 7394c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 7406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 741c609719bSwdenk 742b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 743b37c7e5eSwdenk must also be configured. See I2C Support, below. 744b37c7e5eSwdenk 745e92739d3SPeter Tyser- GPIO Support: 746e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 747e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 748e92739d3SPeter Tyser 7495dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 7505dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 7515dec49caSChris Packham pins supported by a particular chip. 7525dec49caSChris Packham 753e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 754e92739d3SPeter Tyser must also be configured. See I2C Support, below. 755e92739d3SPeter Tyser 756c609719bSwdenk- Timestamp Support: 757c609719bSwdenk 758c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 759c609719bSwdenk (date and time) of an image is printed by image 760c609719bSwdenk commands like bootm or iminfo. This option is 761602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 762c609719bSwdenk 763c609719bSwdenk- Partition Support: 764c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 76507f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 766c609719bSwdenk 767602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 768218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 769218ca724SWolfgang Denk least one partition type as well. 770c609719bSwdenk 771c609719bSwdenk- IDE Reset method: 7724d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 7734d13cbadSwdenk board configurations files but used nowhere! 774c609719bSwdenk 7754d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 7764d13cbadSwdenk be performed by calling the function 7774d13cbadSwdenk ide_set_reset(int reset) 7784d13cbadSwdenk which has to be defined in a board specific file 779c609719bSwdenk 780c609719bSwdenk- ATAPI Support: 781c609719bSwdenk CONFIG_ATAPI 782c609719bSwdenk 783c609719bSwdenk Set this to enable ATAPI support. 784c609719bSwdenk 785c40b2956Swdenk- LBA48 Support 786c40b2956Swdenk CONFIG_LBA48 787c40b2956Swdenk 788c40b2956Swdenk Set this to enable support for disks larger than 137GB 7894b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 790c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 791c40b2956Swdenk support disks up to 2.1TB. 792c40b2956Swdenk 7936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 794c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 795c40b2956Swdenk Default is 32bit. 796c40b2956Swdenk 797c609719bSwdenk- SCSI Support: 798c609719bSwdenk At the moment only there is only support for the 799c609719bSwdenk SYM53C8XX SCSI controller; define 800c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 801c609719bSwdenk 8026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 8036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 8046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 805c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 806c609719bSwdenk devices. 8076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 808c609719bSwdenk 809c609719bSwdenk- NETWORK Support (PCI): 810682011ffSwdenk CONFIG_E1000 811682011ffSwdenk Support for Intel 8254x gigabit chips. 812682011ffSwdenk 813ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 81411ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 815ac3315c2SAndre Schwarz 816c609719bSwdenk CONFIG_EEPRO100 817c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 81811ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 819c609719bSwdenk write routine for first time initialisation. 820c609719bSwdenk 821c609719bSwdenk CONFIG_TULIP 822c609719bSwdenk Support for Digital 2114x chips. 823c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 824c609719bSwdenk modem chip initialisation (KS8761/QS6611). 825c609719bSwdenk 826c609719bSwdenk CONFIG_NATSEMI 827c609719bSwdenk Support for National dp83815 chips. 828c609719bSwdenk 829c609719bSwdenk CONFIG_NS8382X 830c609719bSwdenk Support for National dp8382[01] gigabit chips. 831c609719bSwdenk 83245219c46Swdenk- NETWORK Support (other): 83345219c46Swdenk 834c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 835c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 836c041e9d2SJens Scharsig 837c041e9d2SJens Scharsig CONFIG_RMII 838c041e9d2SJens Scharsig Define this to use reduced MII inteface 839c041e9d2SJens Scharsig 840c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 841c041e9d2SJens Scharsig If this defined, the driver is quiet. 842c041e9d2SJens Scharsig The driver doen't show link status messages. 843c041e9d2SJens Scharsig 84445219c46Swdenk CONFIG_DRIVER_LAN91C96 84545219c46Swdenk Support for SMSC's LAN91C96 chips. 84645219c46Swdenk 84745219c46Swdenk CONFIG_LAN91C96_BASE 84845219c46Swdenk Define this to hold the physical address 84945219c46Swdenk of the LAN91C96's I/O space 85045219c46Swdenk 85145219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 85245219c46Swdenk Define this to enable 32 bit addressing 85345219c46Swdenk 854f39748aeSwdenk CONFIG_DRIVER_SMC91111 855f39748aeSwdenk Support for SMSC's LAN91C111 chip 856f39748aeSwdenk 857f39748aeSwdenk CONFIG_SMC91111_BASE 858f39748aeSwdenk Define this to hold the physical address 859f39748aeSwdenk of the device (I/O space) 860f39748aeSwdenk 861f39748aeSwdenk CONFIG_SMC_USE_32_BIT 862f39748aeSwdenk Define this if data bus is 32 bits 863f39748aeSwdenk 864f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 865f39748aeSwdenk Define this to use i/o functions instead of macros 866f39748aeSwdenk (some hardware wont work with macros) 867f39748aeSwdenk 868b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 869b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 870b3dbf4a5SMacpaul Lin 871b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 872b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 873b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 874b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 875b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 876b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 877b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 878b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 879b3dbf4a5SMacpaul Lin 880c2fff331SMike Rapoport CONFIG_SMC911X 881557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 882557b377dSJens Gehrlein 883c2fff331SMike Rapoport CONFIG_SMC911X_BASE 884557b377dSJens Gehrlein Define this to hold the physical address 885557b377dSJens Gehrlein of the device (I/O space) 886557b377dSJens Gehrlein 887c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 888557b377dSJens Gehrlein Define this if data bus is 32 bits 889557b377dSJens Gehrlein 890c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 891557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 892557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 893c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 894557b377dSJens Gehrlein 8953d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 8963d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 8973d0075faSYoshihiro Shimoda 8983d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 8993d0075faSYoshihiro Shimoda Define the number of ports to be used 9003d0075faSYoshihiro Shimoda 9013d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 9023d0075faSYoshihiro Shimoda Define the ETH PHY's address 9033d0075faSYoshihiro Shimoda 90468260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 90568260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 90668260aabSYoshihiro Shimoda 907c609719bSwdenk- USB Support: 908c609719bSwdenk At the moment only the UHCI host controller is 9094d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 910c609719bSwdenk CONFIG_USB_UHCI to enable it. 911c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 91230d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 913c609719bSwdenk storage devices. 914c609719bSwdenk Note: 915c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 916c609719bSwdenk (TEAC FD-05PUB). 9174d13cbadSwdenk MPC5200 USB requires additional defines: 9184d13cbadSwdenk CONFIG_USB_CLOCK 9194d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 920307ecb6dSEric Millbrandt CONFIG_PSC3_USB 921307ecb6dSEric Millbrandt for USB on PSC3 9224d13cbadSwdenk CONFIG_USB_CONFIG 9234d13cbadSwdenk for differential drivers: 0x00001000 9244d13cbadSwdenk for single ended drivers: 0x00005000 925307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 926307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 9276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 928fdcfaa1bSZhang Wei May be defined to allow interrupt polling 929fdcfaa1bSZhang Wei instead of using asynchronous interrupts 9304d13cbadSwdenk 93116c8d5e7SWolfgang Denk- USB Device: 93216c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 93316c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 93416c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 93511ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 93616c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 93716c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 93816c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 93916c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 94016c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 94116c8d5e7SWolfgang Denk a Linux host by 94216c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 94316c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 94416c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 94516c8d5e7SWolfgang Denk might be defined in YourBoardName.h 94616c8d5e7SWolfgang Denk 94716c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 94816c8d5e7SWolfgang Denk Define this to build a UDC device 94916c8d5e7SWolfgang Denk 95016c8d5e7SWolfgang Denk CONFIG_USB_TTY 95116c8d5e7SWolfgang Denk Define this to have a tty type of device available to 95216c8d5e7SWolfgang Denk talk to the UDC device 95316c8d5e7SWolfgang Denk 9546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 95516c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 95616c8d5e7SWolfgang Denk be set to usbtty. 95716c8d5e7SWolfgang Denk 95816c8d5e7SWolfgang Denk mpc8xx: 9596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 96016c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 9616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 96216c8d5e7SWolfgang Denk 9636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 96416c8d5e7SWolfgang Denk Derive USB clock from brgclk 9656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 96616c8d5e7SWolfgang Denk 96716c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 96816c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 96916c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 97016c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 97116c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 97216c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 97316c8d5e7SWolfgang Denk 97416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 97516c8d5e7SWolfgang Denk Define this string as the name of your company for 97616c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 97716c8d5e7SWolfgang Denk 97816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 97916c8d5e7SWolfgang Denk Define this string as the name of your product 98016c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 98116c8d5e7SWolfgang Denk 98216c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 98316c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 98416c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 98516c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 98616c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 98716c8d5e7SWolfgang Denk 98816c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 98916c8d5e7SWolfgang Denk Define this as the unique Product ID 99016c8d5e7SWolfgang Denk for your device 99116c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 992c609719bSwdenk 993c609719bSwdenk 994c609719bSwdenk- MMC Support: 995c609719bSwdenk The MMC controller on the Intel PXA is supported. To 996c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 997c609719bSwdenk accessed from the boot prompt by mapping the device 998c609719bSwdenk to physical memory similar to flash. Command line is 999602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1000602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1001c609719bSwdenk 10026705d81eSwdenk- Journaling Flash filesystem support: 10036705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 10046705d81eSwdenk CONFIG_JFFS2_NAND_DEV 10056705d81eSwdenk Define these for a default partition on a NAND device 10066705d81eSwdenk 10076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 10086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 10096705d81eSwdenk Define these for a default partition on a NOR device 10106705d81eSwdenk 10116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 10126705d81eSwdenk Define this to create an own partition. You have to provide a 10136705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 10146705d81eSwdenk 10156705d81eSwdenk If you define only one JFFS2 partition you may also want to 10166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 10176705d81eSwdenk to disable the command chpart. This is the default when you 10186705d81eSwdenk have not defined a custom partition 10196705d81eSwdenk 1020c609719bSwdenk- Keyboard Support: 1021c609719bSwdenk CONFIG_ISA_KEYBOARD 1022c609719bSwdenk 1023c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1024c609719bSwdenk support 1025c609719bSwdenk 1026c609719bSwdenk CONFIG_I8042_KBD 1027c609719bSwdenk Standard PC keyboard driver with US (is default) and 1028c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1029c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1030c609719bSwdenk for cfb_console. Supports cursor blinking. 1031c609719bSwdenk 1032c609719bSwdenk- Video support: 1033c609719bSwdenk CONFIG_VIDEO 1034c609719bSwdenk 1035c609719bSwdenk Define this to enable video support (for output to 1036c609719bSwdenk video). 1037c609719bSwdenk 1038c609719bSwdenk CONFIG_VIDEO_CT69000 1039c609719bSwdenk 1040c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1041c609719bSwdenk 1042c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1043eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1044eeb1b77bSwdenk video output is selected via environment 'videoout' 1045eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1046eeb1b77bSwdenk assumed. 1047c609719bSwdenk 1048eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 104911ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1050eeb1b77bSwdenk are possible: 1051eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1052eeb1b77bSwdenk Following standard modes are supported (* is default): 1053eeb1b77bSwdenk 1054eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1055eeb1b77bSwdenk -------------+--------------------------------------------- 1056eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1057eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1058eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1059eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1060eeb1b77bSwdenk -------------+--------------------------------------------- 1061c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1062c609719bSwdenk 1063eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 10647817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1065eeb1b77bSwdenk 1066eeb1b77bSwdenk 1067a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1068a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1069a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1070a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1071a6c7ad2fSwdenk 1072682011ffSwdenk- Keyboard Support: 1073682011ffSwdenk CONFIG_KEYBOARD 1074682011ffSwdenk 1075682011ffSwdenk Define this to enable a custom keyboard support. 1076682011ffSwdenk This simply calls drv_keyboard_init() which must be 1077682011ffSwdenk defined in your board-specific files. 1078682011ffSwdenk The only board using this so far is RBC823. 1079a6c7ad2fSwdenk 1080c609719bSwdenk- LCD Support: CONFIG_LCD 1081c609719bSwdenk 1082c609719bSwdenk Define this to enable LCD support (for output to LCD 1083c609719bSwdenk display); also select one of the supported displays 1084c609719bSwdenk by defining one of these: 1085c609719bSwdenk 108639cf4804SStelian Pop CONFIG_ATMEL_LCD: 108739cf4804SStelian Pop 108839cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 108939cf4804SStelian Pop 1090fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1091c609719bSwdenk 1092fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1093c609719bSwdenk 1094fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1095c609719bSwdenk 1096fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1097fd3103bbSwdenk Active, color, single scan. 1098fd3103bbSwdenk 1099fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1100fd3103bbSwdenk 1101fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1102c609719bSwdenk Active, color, single scan. 1103c609719bSwdenk 1104c609719bSwdenk CONFIG_SHARP_16x9 1105c609719bSwdenk 1106c609719bSwdenk Sharp 320x240. Active, color, single scan. 1107c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1108c609719bSwdenk 1109c609719bSwdenk CONFIG_SHARP_LQ64D341 1110c609719bSwdenk 1111c609719bSwdenk Sharp LQ64D341 display, 640x480. 1112c609719bSwdenk Active, color, single scan. 1113c609719bSwdenk 1114c609719bSwdenk CONFIG_HLD1045 1115c609719bSwdenk 1116c609719bSwdenk HLD1045 display, 640x480. 1117c609719bSwdenk Active, color, single scan. 1118c609719bSwdenk 1119c609719bSwdenk CONFIG_OPTREX_BW 1120c609719bSwdenk 1121c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1122c609719bSwdenk or 1123c609719bSwdenk Hitachi LMG6912RPFC-00T 1124c609719bSwdenk or 1125c609719bSwdenk Hitachi SP14Q002 1126c609719bSwdenk 1127c609719bSwdenk 320x240. Black & white. 1128c609719bSwdenk 1129c609719bSwdenk Normally display is black on white background; define 11306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1131c609719bSwdenk 11327152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1133d791b1dcSwdenk 1134d791b1dcSwdenk If this option is set, the environment is checked for 1135d791b1dcSwdenk a variable "splashimage". If found, the usual display 1136d791b1dcSwdenk of logo, copyright and system information on the LCD 1137e94d2cd9Swdenk is suppressed and the BMP image at the address 1138d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1139d791b1dcSwdenk console is redirected to the "nulldev", too. This 1140d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1141d791b1dcSwdenk loaded very quickly after power-on. 1142d791b1dcSwdenk 11431ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 11441ca298ceSMatthias Weisser 11451ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 11461ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 11471ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 11481ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 11491ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 11501ca298ceSMatthias Weisser specify 'm' for centering the image. 11511ca298ceSMatthias Weisser 11521ca298ceSMatthias Weisser Example: 11531ca298ceSMatthias Weisser setenv splashpos m,m 11541ca298ceSMatthias Weisser => image at center of screen 11551ca298ceSMatthias Weisser 11561ca298ceSMatthias Weisser setenv splashpos 30,20 11571ca298ceSMatthias Weisser => image at x = 30 and y = 20 11581ca298ceSMatthias Weisser 11591ca298ceSMatthias Weisser setenv splashpos -10,m 11601ca298ceSMatthias Weisser => vertically centered image 11611ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 11621ca298ceSMatthias Weisser 116398f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 116498f4a3dfSStefan Roese 116598f4a3dfSStefan Roese If this option is set, additionally to standard BMP 116698f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 116798f4a3dfSStefan Roese splashscreen support or the bmp command. 116898f4a3dfSStefan Roese 1169d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1170d5011762SAnatolij Gustschin 1171d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1172d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1173d5011762SAnatolij Gustschin bmp command. 1174d5011762SAnatolij Gustschin 1175c29fdfc1Swdenk- Compression support: 1176c29fdfc1Swdenk CONFIG_BZIP2 1177c29fdfc1Swdenk 1178c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1179c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1180c29fdfc1Swdenk compressed images are supported. 1181c29fdfc1Swdenk 1182c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 11836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1184c29fdfc1Swdenk be at least 4MB. 1185d791b1dcSwdenk 1186fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1187fc9c1727SLuigi 'Comio' Mantellini 1188fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1189fc9c1727SLuigi 'Comio' Mantellini images is included. 1190fc9c1727SLuigi 'Comio' Mantellini 1191fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1192fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1193fc9c1727SLuigi 'Comio' Mantellini formula: 1194fc9c1727SLuigi 'Comio' Mantellini 1195fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1196fc9c1727SLuigi 'Comio' Mantellini 1197fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1198fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1199fc9c1727SLuigi 'Comio' Mantellini 1200fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1201fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1202fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1203fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1204fc9c1727SLuigi 'Comio' Mantellini 1205fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1206fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 12076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1208fc9c1727SLuigi 'Comio' Mantellini 120917ea1177Swdenk- MII/PHY support: 121017ea1177Swdenk CONFIG_PHY_ADDR 121117ea1177Swdenk 121217ea1177Swdenk The address of PHY on MII bus. 121317ea1177Swdenk 121417ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 121517ea1177Swdenk 121617ea1177Swdenk The clock frequency of the MII bus 121717ea1177Swdenk 121817ea1177Swdenk CONFIG_PHY_GIGE 121917ea1177Swdenk 122017ea1177Swdenk If this option is set, support for speed/duplex 122111ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 122217ea1177Swdenk 122317ea1177Swdenk CONFIG_PHY_RESET_DELAY 122417ea1177Swdenk 122517ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 122617ea1177Swdenk reset before any MII register access is possible. 122717ea1177Swdenk For such PHY, set this option to the usec delay 122817ea1177Swdenk required. (minimum 300usec for LXT971A) 122917ea1177Swdenk 123017ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 123117ea1177Swdenk 123217ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 123317ea1177Swdenk command issued before MII status register can be read 123417ea1177Swdenk 1235c609719bSwdenk- Ethernet address: 1236c609719bSwdenk CONFIG_ETHADDR 1237c68a05feSrichardretanubun CONFIG_ETH1ADDR 1238c609719bSwdenk CONFIG_ETH2ADDR 1239c609719bSwdenk CONFIG_ETH3ADDR 1240c68a05feSrichardretanubun CONFIG_ETH4ADDR 1241c68a05feSrichardretanubun CONFIG_ETH5ADDR 1242c609719bSwdenk 124311ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 124411ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1245c609719bSwdenk is not determined automatically. 1246c609719bSwdenk 1247c609719bSwdenk- IP address: 1248c609719bSwdenk CONFIG_IPADDR 1249c609719bSwdenk 1250c609719bSwdenk Define a default value for the IP address to use for 125111ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1252c609719bSwdenk determined through e.g. bootp. 1253c609719bSwdenk 1254c609719bSwdenk- Server IP address: 1255c609719bSwdenk CONFIG_SERVERIP 1256c609719bSwdenk 1257c609719bSwdenk Defines a default value for the IP address of a TFTP 1258c609719bSwdenk server to contact when using the "tftboot" command. 1259c609719bSwdenk 126097cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 126197cfe861SRobin Getz 126297cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 126397cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 126497cfe861SRobin Getz 126553a5c424SDavid Updegraff- Multicast TFTP Mode: 126653a5c424SDavid Updegraff CONFIG_MCAST_TFTP 126753a5c424SDavid Updegraff 126853a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 126953a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 127011ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 127153a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 127253a5c424SDavid Updegraff multicast group. 127353a5c424SDavid Updegraff 127453a5c424SDavid Updegraff CONFIG_BOOTP_RANDOM_DELAY 1275c609719bSwdenk- BOOTP Recovery Mode: 1276c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1277c609719bSwdenk 1278c609719bSwdenk If you have many targets in a network that try to 1279c609719bSwdenk boot using BOOTP, you may want to avoid that all 1280c609719bSwdenk systems send out BOOTP requests at precisely the same 1281c609719bSwdenk moment (which would happen for instance at recovery 1282c609719bSwdenk from a power failure, when all systems will try to 1283c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1284c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1285c609719bSwdenk inserted before sending out BOOTP requests. The 12866c33c785SWolfgang Denk following delays are inserted then: 1287c609719bSwdenk 1288c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1289c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1290c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1291c609719bSwdenk 4th and following 1292c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1293c609719bSwdenk 1294fe389a82Sstroese- DHCP Advanced Options: 12951fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 12961fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1297fe389a82Sstroese 12981fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 12991fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 13001fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 13011fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 13021fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 13031fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 13041fe80d79SJon Loeliger CONFIG_BOOTP_DNS 13051fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 13061fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 13071fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 13081fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 13091fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1310fe389a82Sstroese 13115d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 13125d110f0aSWilson Callan environment variable, not the BOOTP server. 1313fe389a82Sstroese 1314fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1315fe389a82Sstroese serverip from a DHCP server, it is possible that more 1316fe389a82Sstroese than one DNS serverip is offered to the client. 1317fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1318fe389a82Sstroese serverip will be stored in the additional environment 1319fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1320fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 13211fe80d79SJon Loeliger is defined. 1322fe389a82Sstroese 1323fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1324fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1325fe389a82Sstroese need the hostname of the DHCP requester. 13265d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 13271fe80d79SJon Loeliger of the "hostname" environment variable is passed as 13281fe80d79SJon Loeliger option 12 to the DHCP server. 1329fe389a82Sstroese 1330d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1331d9a2f416SAras Vaichas 1332d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1333d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1334d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1335d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1336d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1337d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1338d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1339d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1340d9a2f416SAras Vaichas that one of the retries will be successful but note that 1341d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1342d9a2f416SAras Vaichas this delay. 1343d9a2f416SAras Vaichas 1344a3d991bdSwdenk - CDP Options: 1345a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1346a3d991bdSwdenk 1347a3d991bdSwdenk The device id used in CDP trigger frames. 1348a3d991bdSwdenk 1349a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1350a3d991bdSwdenk 1351a3d991bdSwdenk A two character string which is prefixed to the MAC address 1352a3d991bdSwdenk of the device. 1353a3d991bdSwdenk 1354a3d991bdSwdenk CONFIG_CDP_PORT_ID 1355a3d991bdSwdenk 1356a3d991bdSwdenk A printf format string which contains the ascii name of 1357a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 135811ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1359a3d991bdSwdenk 1360a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1361a3d991bdSwdenk 1362a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1363a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1364a3d991bdSwdenk 1365a3d991bdSwdenk CONFIG_CDP_VERSION 1366a3d991bdSwdenk 1367a3d991bdSwdenk An ascii string containing the version of the software. 1368a3d991bdSwdenk 1369a3d991bdSwdenk CONFIG_CDP_PLATFORM 1370a3d991bdSwdenk 1371a3d991bdSwdenk An ascii string containing the name of the platform. 1372a3d991bdSwdenk 1373a3d991bdSwdenk CONFIG_CDP_TRIGGER 1374a3d991bdSwdenk 1375a3d991bdSwdenk A 32bit integer sent on the trigger. 1376a3d991bdSwdenk 1377a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1378a3d991bdSwdenk 1379a3d991bdSwdenk A 16bit integer containing the power consumption of the 1380a3d991bdSwdenk device in .1 of milliwatts. 1381a3d991bdSwdenk 1382a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1383a3d991bdSwdenk 1384a3d991bdSwdenk A byte containing the id of the VLAN. 1385a3d991bdSwdenk 1386c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1387c609719bSwdenk 1388c609719bSwdenk Several configurations allow to display the current 1389c609719bSwdenk status using a LED. For instance, the LED will blink 1390c609719bSwdenk fast while running U-Boot code, stop blinking as 1391c609719bSwdenk soon as a reply to a BOOTP request was received, and 1392c609719bSwdenk start blinking slow once the Linux kernel is running 1393c609719bSwdenk (supported by a status LED driver in the Linux 1394c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1395c609719bSwdenk feature in U-Boot. 1396c609719bSwdenk 1397c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1398c609719bSwdenk 1399c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1400c609719bSwdenk on those systems that support this (optional) 1401c609719bSwdenk feature, like the TQM8xxL modules. 1402c609719bSwdenk 1403c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1404c609719bSwdenk 1405b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1406b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 140711ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1408c609719bSwdenk 1409b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1410602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1411b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1412b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1413c609719bSwdenk command line interface. 1414c609719bSwdenk 1415bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1416c609719bSwdenk 1417b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1418b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1419b37c7e5eSwdenk support for I2C. 1420c609719bSwdenk 1421b37c7e5eSwdenk There are several other quantities that must also be 1422b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1423c609719bSwdenk 14246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1425b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 14266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 142711ccc33fSMarcel Ziswiler the CPU's i2c node address). 1428c609719bSwdenk 14298d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1430a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 14318d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 14328d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 14338d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1434b37c7e5eSwdenk 14355da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 14365da71efaSEric Millbrandt 14375da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 14385da71efaSEric Millbrandt chips might think that the current transfer is still 14395da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 14405da71efaSEric Millbrandt commands until the slave device responds. 14415da71efaSEric Millbrandt 1442b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1443b37c7e5eSwdenk 1444b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1445b37c7e5eSwdenk then the following macros need to be defined (examples are 1446b37c7e5eSwdenk from include/configs/lwmon.h): 1447c609719bSwdenk 1448c609719bSwdenk I2C_INIT 1449c609719bSwdenk 1450b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1451c609719bSwdenk controller or configure ports. 1452c609719bSwdenk 1453b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1454b37c7e5eSwdenk 1455c609719bSwdenk I2C_PORT 1456c609719bSwdenk 1457c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1458c609719bSwdenk assumes both bits are on the same port). Valid values 1459c609719bSwdenk are 0..3 for ports A..D. 1460c609719bSwdenk 1461c609719bSwdenk I2C_ACTIVE 1462c609719bSwdenk 1463c609719bSwdenk The code necessary to make the I2C data line active 1464c609719bSwdenk (driven). If the data line is open collector, this 1465c609719bSwdenk define can be null. 1466c609719bSwdenk 1467b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1468b37c7e5eSwdenk 1469c609719bSwdenk I2C_TRISTATE 1470c609719bSwdenk 1471c609719bSwdenk The code necessary to make the I2C data line tri-stated 1472c609719bSwdenk (inactive). If the data line is open collector, this 1473c609719bSwdenk define can be null. 1474c609719bSwdenk 1475b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1476b37c7e5eSwdenk 1477c609719bSwdenk I2C_READ 1478c609719bSwdenk 1479c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1480c609719bSwdenk FALSE if it is low. 1481c609719bSwdenk 1482b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1483b37c7e5eSwdenk 1484c609719bSwdenk I2C_SDA(bit) 1485c609719bSwdenk 1486c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1487c609719bSwdenk is FALSE, it clears it (low). 1488c609719bSwdenk 1489b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1490b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1491b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1492b37c7e5eSwdenk 1493c609719bSwdenk I2C_SCL(bit) 1494c609719bSwdenk 1495c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1496c609719bSwdenk is FALSE, it clears it (low). 1497c609719bSwdenk 1498b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1499b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1500b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1501b37c7e5eSwdenk 1502c609719bSwdenk I2C_DELAY 1503c609719bSwdenk 1504c609719bSwdenk This delay is invoked four times per clock cycle so this 1505c609719bSwdenk controls the rate of data transfer. The data rate thus 1506b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1507b37c7e5eSwdenk like: 1508b37c7e5eSwdenk 1509b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1510c609719bSwdenk 1511793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1512793b5726SMike Frysinger 1513793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1514793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1515793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1516793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1517793b5726SMike Frysinger 1518793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1519793b5726SMike Frysinger the generic GPIO functions. 1520793b5726SMike Frysinger 15216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 152247cd00faSwdenk 152347cd00faSwdenk When a board is reset during an i2c bus transfer 152447cd00faSwdenk chips might think that the current transfer is still 152547cd00faSwdenk in progress. On some boards it is possible to access 152647cd00faSwdenk the i2c SCLK line directly, either by using the 152747cd00faSwdenk processor pin as a GPIO or by having a second pin 152847cd00faSwdenk connected to the bus. If this option is defined a 152947cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 153047cd00faSwdenk is run early in the boot sequence. 153147cd00faSwdenk 153226a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 153326a33504SRichard Retanubun 153426a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 153526a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 153626a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 153726a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 153826a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 153926a33504SRichard Retanubun controller provide such a method. It is called at the end of 154026a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 154126a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 154226a33504SRichard Retanubun 154317ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 154417ea1177Swdenk 154517ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 154617ea1177Swdenk in u-boot bd_info structure based on u-boot environment 154717ea1177Swdenk variable "i2cfast". (see also i2cfast) 154817ea1177Swdenk 1549bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1550bb99ad6dSBen Warren 1551bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1552bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1553bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1554bb99ad6dSBen Warren Note that bus numbering is zero-based. 1555bb99ad6dSBen Warren 15566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1557bb99ad6dSBen Warren 1558bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 15590f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 15600f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 15610f89c54bSPeter Tyser a 1D array of device addresses 1562bb99ad6dSBen Warren 1563bb99ad6dSBen Warren e.g. 1564bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 15656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1566bb99ad6dSBen Warren 1567bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1568bb99ad6dSBen Warren 1569bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 15706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1571bb99ad6dSBen Warren 1572bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1573bb99ad6dSBen Warren 15746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1575be5e6181STimur Tabi 1576be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1577be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1578be5e6181STimur Tabi 15796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 15800dc018ecSStefan Roese 15810dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 15820dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 15830dc018ecSStefan Roese 15846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 15850dc018ecSStefan Roese 15860dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 15870dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 15880dc018ecSStefan Roese 15896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 15909ebbb54fSVictor Gallardo 15919ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 15929ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 15939ebbb54fSVictor Gallardo specified DTT device. 15949ebbb54fSVictor Gallardo 1595be5e6181STimur Tabi CONFIG_FSL_I2C 1596be5e6181STimur Tabi 1597be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 15987817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1599be5e6181STimur Tabi 160067b23a32SHeiko Schocher CONFIG_I2C_MUX 160167b23a32SHeiko Schocher 160267b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 160367b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 160467b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 160567b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 160667b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 160767b23a32SHeiko Schocher the muxes to activate this new "bus". 160867b23a32SHeiko Schocher 160967b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 161067b23a32SHeiko Schocher feature! 161167b23a32SHeiko Schocher 161267b23a32SHeiko Schocher Example: 161367b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 161467b23a32SHeiko Schocher The First mux with address 70 and channel 6 161567b23a32SHeiko Schocher The Second mux with address 71 and channel 4 161667b23a32SHeiko Schocher 161767b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 161867b23a32SHeiko Schocher 161967b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 162067b23a32SHeiko Schocher of I2C Busses with muxes: 162167b23a32SHeiko Schocher 162267b23a32SHeiko Schocher => i2c bus 162367b23a32SHeiko Schocher Busses reached over muxes: 162467b23a32SHeiko Schocher Bus ID: 2 162567b23a32SHeiko Schocher reached over Mux(es): 162667b23a32SHeiko Schocher pca9544a@70 ch: 4 162767b23a32SHeiko Schocher Bus ID: 3 162867b23a32SHeiko Schocher reached over Mux(es): 162967b23a32SHeiko Schocher pca9544a@70 ch: 6 163067b23a32SHeiko Schocher pca9544a@71 ch: 4 163167b23a32SHeiko Schocher => 163267b23a32SHeiko Schocher 163367b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 163467b23a32SHeiko Schocher u-boot sends First the Commando to the mux@70 to enable 163567b23a32SHeiko Schocher channel 6, and then the Commando to the mux@71 to enable 163667b23a32SHeiko Schocher the channel 4. 163767b23a32SHeiko Schocher 163867b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 163967b23a32SHeiko Schocher usual, to communicate with your I2C devices behind 164067b23a32SHeiko Schocher the 2 muxes. 164167b23a32SHeiko Schocher 164267b23a32SHeiko Schocher This option is actually implemented for the bitbanging 164367b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 164467b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 164567b23a32SHeiko Schocher to add this option to other architectures. 164667b23a32SHeiko Schocher 16472ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 16482ac6985aSAndrew Dyer 16492ac6985aSAndrew Dyer defining this will force the i2c_read() function in 16502ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 16512ac6985aSAndrew Dyer between writing the address pointer and reading the 16522ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 16532ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 16542ac6985aSAndrew Dyer devices can use either method, but some require one or 16552ac6985aSAndrew Dyer the other. 1656be5e6181STimur Tabi 1657c609719bSwdenk- SPI Support: CONFIG_SPI 1658c609719bSwdenk 1659c609719bSwdenk Enables SPI driver (so far only tested with 1660c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1661c609719bSwdenk D/As on the SACSng board) 1662c609719bSwdenk 1663*6639562eSYoshihiro Shimoda CONFIG_SH_SPI 1664*6639562eSYoshihiro Shimoda 1665*6639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 1666*6639562eSYoshihiro Shimoda only SH7757 is supported. 1667*6639562eSYoshihiro Shimoda 1668c609719bSwdenk CONFIG_SPI_X 1669c609719bSwdenk 1670c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1671c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1672c609719bSwdenk 1673c609719bSwdenk CONFIG_SOFT_SPI 1674c609719bSwdenk 1675c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1676c609719bSwdenk using hardware support. This is a general purpose 1677c609719bSwdenk driver that only requires three general I/O port pins 1678c609719bSwdenk (two outputs, one input) to function. If this is 1679c609719bSwdenk defined, the board configuration must define several 1680c609719bSwdenk SPI configuration items (port pins to use, etc). For 1681c609719bSwdenk an example, see include/configs/sacsng.h. 1682c609719bSwdenk 168304a9e118SBen Warren CONFIG_HARD_SPI 168404a9e118SBen Warren 168504a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 168604a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 168704a9e118SBen Warren must define a list of chip-select function pointers. 168804a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 168904a9e118SBen Warren example, see include/configs/mpc8349emds.h. 169004a9e118SBen Warren 169138254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 169238254f45SGuennadi Liakhovetski 169338254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 169438254f45SGuennadi Liakhovetski SoCs. Currently only i.MX31 is supported. 169538254f45SGuennadi Liakhovetski 16960133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 16970133502eSMatthias Fuchs 16980133502eSMatthias Fuchs Enables FPGA subsystem. 16990133502eSMatthias Fuchs 17000133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 17010133502eSMatthias Fuchs 17020133502eSMatthias Fuchs Enables support for specific chip vendors. 17030133502eSMatthias Fuchs (ALTERA, XILINX) 17040133502eSMatthias Fuchs 17050133502eSMatthias Fuchs CONFIG_FPGA_<family> 17060133502eSMatthias Fuchs 17070133502eSMatthias Fuchs Enables support for FPGA family. 17080133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 17090133502eSMatthias Fuchs 17100133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1711c609719bSwdenk 1712c609719bSwdenk Specify the number of FPGA devices to support. 1713c609719bSwdenk 17146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1715c609719bSwdenk 1716c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1717c609719bSwdenk 17186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1719c609719bSwdenk 1720c609719bSwdenk Enable checks on FPGA configuration interface busy 1721c609719bSwdenk status by the configuration function. This option 1722c609719bSwdenk will require a board or device specific function to 1723c609719bSwdenk be written. 1724c609719bSwdenk 1725c609719bSwdenk CONFIG_FPGA_DELAY 1726c609719bSwdenk 1727c609719bSwdenk If defined, a function that provides delays in the FPGA 1728c609719bSwdenk configuration driver. 1729c609719bSwdenk 17306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 1731c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1732c609719bSwdenk 17336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 1734c609719bSwdenk 1735c609719bSwdenk Check for configuration errors during FPGA bitfile 1736c609719bSwdenk loading. For example, abort during Virtex II 1737c609719bSwdenk configuration if the INIT_B line goes low (which 1738c609719bSwdenk indicated a CRC error). 1739c609719bSwdenk 17406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 1741c609719bSwdenk 1742c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1743c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1744c609719bSwdenk FPGA configuration sequence. The default time is 500 174511ccc33fSMarcel Ziswiler ms. 1746c609719bSwdenk 17476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 1748c609719bSwdenk 1749c609719bSwdenk Maximum time to wait for BUSY to deassert during 175011ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 1751c609719bSwdenk 17526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 1753c609719bSwdenk 1754c609719bSwdenk Time to wait after FPGA configuration. The default is 175511ccc33fSMarcel Ziswiler 200 ms. 1756c609719bSwdenk 1757c609719bSwdenk- Configuration Management: 1758c609719bSwdenk CONFIG_IDENT_STRING 1759c609719bSwdenk 1760c609719bSwdenk If defined, this string will be added to the U-Boot 1761c609719bSwdenk version information (U_BOOT_VERSION) 1762c609719bSwdenk 1763c609719bSwdenk- Vendor Parameter Protection: 1764c609719bSwdenk 1765c609719bSwdenk U-Boot considers the values of the environment 1766c609719bSwdenk variables "serial#" (Board Serial Number) and 17677152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1768c609719bSwdenk are set once by the board vendor / manufacturer, and 1769c609719bSwdenk protects these variables from casual modification by 1770c609719bSwdenk the user. Once set, these variables are read-only, 1771c609719bSwdenk and write or delete attempts are rejected. You can 177211ccc33fSMarcel Ziswiler change this behaviour: 1773c609719bSwdenk 1774c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1775c609719bSwdenk file, the write protection for vendor parameters is 177647cd00faSwdenk completely disabled. Anybody can change or delete 1777c609719bSwdenk these parameters. 1778c609719bSwdenk 1779c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1780c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 178111ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 1782c609719bSwdenk which can be changed exactly ONCE by the user. [The 1783c609719bSwdenk serial# is unaffected by this, i. e. it remains 1784c609719bSwdenk read-only.] 1785c609719bSwdenk 1786c609719bSwdenk- Protected RAM: 1787c609719bSwdenk CONFIG_PRAM 1788c609719bSwdenk 1789c609719bSwdenk Define this variable to enable the reservation of 1790c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1791c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1792c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1793c609719bSwdenk this default value by defining an environment 1794c609719bSwdenk variable "pram" to the number of kB you want to 1795c609719bSwdenk reserve. Note that the board info structure will 1796c609719bSwdenk still show the full amount of RAM. If pRAM is 1797c609719bSwdenk reserved, a new environment variable "mem" will 1798c609719bSwdenk automatically be defined to hold the amount of 1799c609719bSwdenk remaining RAM in a form that can be passed as boot 1800c609719bSwdenk argument to Linux, for instance like that: 1801c609719bSwdenk 1802fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1803c609719bSwdenk saveenv 1804c609719bSwdenk 1805c609719bSwdenk This way you can tell Linux not to use this memory, 1806c609719bSwdenk either, which results in a memory region that will 1807c609719bSwdenk not be affected by reboots. 1808c609719bSwdenk 1809c609719bSwdenk *WARNING* If your board configuration uses automatic 1810c609719bSwdenk detection of the RAM size, you must make sure that 1811c609719bSwdenk this memory test is non-destructive. So far, the 1812c609719bSwdenk following board configurations are known to be 1813c609719bSwdenk "pRAM-clean": 1814c609719bSwdenk 1815c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1816c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1817544d97e9SWolfgang Denk FLAGADM, TQM8260 1818c609719bSwdenk 1819c609719bSwdenk- Error Recovery: 1820c609719bSwdenk CONFIG_PANIC_HANG 1821c609719bSwdenk 1822c609719bSwdenk Define this variable to stop the system in case of a 1823c609719bSwdenk fatal error, so that you have to reset it manually. 1824c609719bSwdenk This is probably NOT a good idea for an embedded 182511ccc33fSMarcel Ziswiler system where you want the system to reboot 1826c609719bSwdenk automatically as fast as possible, but it may be 1827c609719bSwdenk useful during development since you can try to debug 1828c609719bSwdenk the conditions that lead to the situation. 1829c609719bSwdenk 1830c609719bSwdenk CONFIG_NET_RETRY_COUNT 1831c609719bSwdenk 1832c609719bSwdenk This variable defines the number of retries for 1833c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1834c609719bSwdenk before giving up the operation. If not defined, a 1835c609719bSwdenk default value of 5 is used. 1836c609719bSwdenk 183740cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 183840cb90eeSGuennadi Liakhovetski 183940cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 184040cb90eeSGuennadi Liakhovetski 1841c609719bSwdenk- Command Interpreter: 18428078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 184304a85b3bSwdenk 184404a85b3bSwdenk Enable auto completion of commands using TAB. 184504a85b3bSwdenk 18468078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 18478078f1a5SWolfgang Denk for the "hush" shell. 18488078f1a5SWolfgang Denk 18498078f1a5SWolfgang Denk 18506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 1851c609719bSwdenk 1852c609719bSwdenk Define this variable to enable the "hush" shell (from 1853c609719bSwdenk Busybox) as command line interpreter, thus enabling 1854c609719bSwdenk powerful command line syntax like 1855c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 1856c609719bSwdenk constructs ("shell scripts"). 1857c609719bSwdenk 1858c609719bSwdenk If undefined, you get the old, much simpler behaviour 1859c609719bSwdenk with a somewhat smaller memory footprint. 1860c609719bSwdenk 1861c609719bSwdenk 18626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 1863c609719bSwdenk 1864c609719bSwdenk This defines the secondary prompt string, which is 1865c609719bSwdenk printed when the command interpreter needs more input 1866c609719bSwdenk to complete a command. Usually "> ". 1867c609719bSwdenk 1868c609719bSwdenk Note: 1869c609719bSwdenk 1870c609719bSwdenk In the current implementation, the local variables 1871c609719bSwdenk space and global environment variables space are 1872c609719bSwdenk separated. Local variables are those you define by 18733b57fe0aSwdenk simply typing `name=value'. To access a local 1874c609719bSwdenk variable later on, you have write `$name' or 18753b57fe0aSwdenk `${name}'; to execute the contents of a variable 18763b57fe0aSwdenk directly type `$name' at the command prompt. 1877c609719bSwdenk 1878c609719bSwdenk Global environment variables are those you use 1879c609719bSwdenk setenv/printenv to work with. To run a command stored 1880c609719bSwdenk in such a variable, you need to use the run command, 1881c609719bSwdenk and you must not use the '$' sign to access them. 1882c609719bSwdenk 1883c609719bSwdenk To store commands and special characters in a 1884c609719bSwdenk variable, please use double quotation marks 1885c609719bSwdenk surrounding the whole text of the variable, instead 1886c609719bSwdenk of the backslashes before semicolons and special 1887c609719bSwdenk symbols. 1888c609719bSwdenk 1889aa0c71acSWolfgang Denk- Commandline Editing and History: 1890aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 1891aa0c71acSWolfgang Denk 189211ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 1893aa0c71acSWolfgang Denk commandline input operations 1894aa0c71acSWolfgang Denk 1895a8c7c708Swdenk- Default Environment: 1896c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 1897c609719bSwdenk 1898c609719bSwdenk Define this to contain any number of null terminated 1899c609719bSwdenk strings (variable = value pairs) that will be part of 19007152b1d0Swdenk the default environment compiled into the boot image. 19012262cfeeSwdenk 1902c609719bSwdenk For example, place something like this in your 1903c609719bSwdenk board's config file: 1904c609719bSwdenk 1905c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 1906c609719bSwdenk "myvar1=value1\0" \ 1907c609719bSwdenk "myvar2=value2\0" 1908c609719bSwdenk 1909c609719bSwdenk Warning: This method is based on knowledge about the 1910c609719bSwdenk internal format how the environment is stored by the 19112262cfeeSwdenk U-Boot code. This is NOT an official, exported 1912c609719bSwdenk interface! Although it is unlikely that this format 19137152b1d0Swdenk will change soon, there is no guarantee either. 1914c609719bSwdenk You better know what you are doing here. 1915c609719bSwdenk 1916c609719bSwdenk Note: overly (ab)use of the default environment is 1917c609719bSwdenk discouraged. Make sure to check other ways to preset 191874de7aefSWolfgang Denk the environment like the "source" command or the 1919c609719bSwdenk boot command first. 1920c609719bSwdenk 1921a8c7c708Swdenk- DataFlash Support: 19222abbe075Swdenk CONFIG_HAS_DATAFLASH 19232abbe075Swdenk 19242abbe075Swdenk Defining this option enables DataFlash features and 19252abbe075Swdenk allows to read/write in Dataflash via the standard 19262abbe075Swdenk commands cp, md... 19272abbe075Swdenk 19283f85ce27Swdenk- SystemACE Support: 19293f85ce27Swdenk CONFIG_SYSTEMACE 19303f85ce27Swdenk 19313f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 19323f85ce27Swdenk chips attached via some sort of local bus. The address 193311ccc33fSMarcel Ziswiler of the chip must also be defined in the 19346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 19353f85ce27Swdenk 19363f85ce27Swdenk #define CONFIG_SYSTEMACE 19376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 19383f85ce27Swdenk 19393f85ce27Swdenk When SystemACE support is added, the "ace" device type 19403f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 19413f85ce27Swdenk 1942ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 1943ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 1944ecb0ccd9SWolfgang Denk 194528cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 1946ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 194728cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 1948ecb0ccd9SWolfgang Denk number generator is used. 1949ecb0ccd9SWolfgang Denk 195028cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 195128cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 195228cb9375SWolfgang Denk defined, the normal port 69 is used. 195328cb9375SWolfgang Denk 195428cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 1955ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 1956ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 1957ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 1958ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 1959ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 1960ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 1961ecb0ccd9SWolfgang Denk 1962a8c7c708Swdenk- Show boot progress: 1963c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 1964c609719bSwdenk 1965c609719bSwdenk Defining this option allows to add some board- 1966c609719bSwdenk specific code (calling a user-provided function 1967c609719bSwdenk "show_boot_progress(int)") that enables you to show 1968c609719bSwdenk the system's boot progress on some display (for 1969c609719bSwdenk example, some LED's) on your board. At the moment, 1970c609719bSwdenk the following checkpoints are implemented: 1971c609719bSwdenk 19721372cce2SMarian BalakowiczLegacy uImage format: 19731372cce2SMarian Balakowicz 1974c609719bSwdenk Arg Where When 1975c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 1976c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 1977c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 1978c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 1979c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 1980c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 1981c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 1982c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 1983c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 19841372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 1985c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 1986c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 1987c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 1988c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 19891372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 1990c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 19911372cce2SMarian Balakowicz 19921372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 19931372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 19941372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 19951372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 19961372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 19971372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 19981372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 199911ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 20001372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 20011372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 20021372cce2SMarian Balakowicz 2003ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2004c609719bSwdenk 2005a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 200663e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 200763e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 200863e73c9aSwdenk 2009566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2010566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2011566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2012566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2013566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2014566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2015566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2016566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2017566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2018566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2019566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2020566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2021566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2022566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2023566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2024566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2025566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2026566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2027566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2028566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2029566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2030566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2031566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2032566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2033566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2034566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2035566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2036566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2037566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2038566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2039566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2040566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2041566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2042566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2043566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2044566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2045566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2046566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2047566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2048566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2049566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2050566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2051566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2052566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2053566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2054566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2055566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2056c609719bSwdenk 2057566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2058c609719bSwdenk 2059566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2060566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2061566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2062206c60cbSwdenk 2063566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2064566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 206511ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2066566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2067566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2068566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 206974de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 207074de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2071566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2072c609719bSwdenk 20731372cce2SMarian BalakowiczFIT uImage format: 20741372cce2SMarian Balakowicz 20751372cce2SMarian Balakowicz Arg Where When 20761372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 20771372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 20781372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 20791372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 20801372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 20811372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2082f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 20831372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 20841372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 20851372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 20861372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 20871372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 208811ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 208911ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 20901372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 20911372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 20921372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 20931372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 20941372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 20951372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 20961372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 20971372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 20981372cce2SMarian Balakowicz 20991372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 21001372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 21011372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 210211ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 21031372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 21041372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 21051372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 21061372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 21071372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 21081372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 21091372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 21101372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 21111372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 21121372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 21131372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 21141372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 21151372cce2SMarian Balakowicz 211611ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 21171372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 21181372cce2SMarian Balakowicz 211911ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 21201372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 21211372cce2SMarian Balakowicz 212211ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 21231372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 21241372cce2SMarian Balakowicz 2125cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2126cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2127cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2128cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2129cccfc2abSDetlev Zundel 2130cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2131cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2132cccfc2abSDetlev Zundel 2133cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2134cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2135cccfc2abSDetlev Zundel 2136cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2137cccfc2abSDetlev Zundel Needed for mtdparts command support. 2138cccfc2abSDetlev Zundel 2139cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2140cccfc2abSDetlev Zundel 2141cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2142cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2143cccfc2abSDetlev Zundel 21441372cce2SMarian Balakowicz 2145c609719bSwdenkModem Support: 2146c609719bSwdenk-------------- 2147c609719bSwdenk 214885ec0bccSwdenk[so far only for SMDK2400 and TRAB boards] 2149c609719bSwdenk 215011ccc33fSMarcel Ziswiler- Modem support enable: 2151c609719bSwdenk CONFIG_MODEM_SUPPORT 2152c609719bSwdenk 2153c609719bSwdenk- RTS/CTS Flow control enable: 2154c609719bSwdenk CONFIG_HWFLOW 2155c609719bSwdenk 2156c609719bSwdenk- Modem debug support: 2157c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2158c609719bSwdenk 2159c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2160c609719bSwdenk for modem support. Useful only with BDI2000. 2161c609719bSwdenk 2162a8c7c708Swdenk- Interrupt support (PPC): 2163a8c7c708Swdenk 2164a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2165a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 216611ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2167a8c7c708Swdenk should set decrementer_count to appropriate value. If 216811ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2169a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 217011ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2171a8c7c708Swdenk specific handling. If board has watchdog / status_led 2172a8c7c708Swdenk / other_activity_monitor it works automatically from 2173a8c7c708Swdenk general timer_interrupt(). 2174a8c7c708Swdenk 2175c609719bSwdenk- General: 2176c609719bSwdenk 2177c609719bSwdenk In the target system modem support is enabled when a 2178c609719bSwdenk specific key (key combination) is pressed during 2179c609719bSwdenk power-on. Otherwise U-Boot will boot normally 218011ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2181c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2182c609719bSwdenk function, returning 1 and thus enabling modem 2183c609719bSwdenk initialization. 2184c609719bSwdenk 2185c609719bSwdenk If there are no modem init strings in the 2186c609719bSwdenk environment, U-Boot proceed to autoboot; the 2187c609719bSwdenk previous output (banner, info printfs) will be 218811ccc33fSMarcel Ziswiler suppressed, though. 2189c609719bSwdenk 2190c609719bSwdenk See also: doc/README.Modem 2191c609719bSwdenk 2192c609719bSwdenk 2193c609719bSwdenkConfiguration Settings: 2194c609719bSwdenk----------------------- 2195c609719bSwdenk 21966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2197c609719bSwdenk undefine this when you're short of memory. 2198c609719bSwdenk 21992fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 22002fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 22012fb2604dSPeter Tyser 22026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2203c609719bSwdenk prompt for user input. 2204c609719bSwdenk 22056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2206c609719bSwdenk 22076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2208c609719bSwdenk 22096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2210c609719bSwdenk 22116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2212c609719bSwdenk the application (usually a Linux kernel) when it is 2213c609719bSwdenk booted 2214c609719bSwdenk 22156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2216c609719bSwdenk List of legal baudrate settings for this board. 2217c609719bSwdenk 22186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2219c609719bSwdenk Suppress display of console information at boot. 2220c609719bSwdenk 22216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2222c609719bSwdenk If the board specific function 2223c609719bSwdenk extern int overwrite_console (void); 2224c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2225c609719bSwdenk serial port, else the settings in the environment are used. 2226c609719bSwdenk 22276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2228c609719bSwdenk Enable the call to overwrite_console(). 2229c609719bSwdenk 22306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2231c609719bSwdenk Enable overwrite of previous console environment settings. 2232c609719bSwdenk 22336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2234c609719bSwdenk Begin and End addresses of the area used by the 2235c609719bSwdenk simple memory test. 2236c609719bSwdenk 22376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2238c609719bSwdenk Enable an alternate, more extensive memory test. 2239c609719bSwdenk 22406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 22415f535fe1Swdenk Scratch address used by the alternate memory test 22425f535fe1Swdenk You only need to set this if address zero isn't writeable 22435f535fe1Swdenk 22446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 22456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 224614f73ca6SStefan Roese this specified memory area will get subtracted from the top 224711ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 224814f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 224914f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 225014f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 22515e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 225214f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 22535e12e75dSStefan Roese will have to get fixed in Linux additionally. 225414f73ca6SStefan Roese 225514f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 225614f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 225714f73ca6SStefan Roese be touched. 225814f73ca6SStefan Roese 225914f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 226014f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 226114f73ca6SStefan Roese then the end address of the Linux memory will be located at a 226214f73ca6SStefan Roese non page size aligned address and this could cause major 226314f73ca6SStefan Roese problems. 226414f73ca6SStefan Roese 22656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2266c609719bSwdenk Default load address for network file downloads 2267c609719bSwdenk 22686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2269c609719bSwdenk Enable temporary baudrate change while serial download 2270c609719bSwdenk 22716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2272c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2273c609719bSwdenk 22746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2275c609719bSwdenk Physical start address of Motherboard I/O (if using a 2276c609719bSwdenk Cogent motherboard) 2277c609719bSwdenk 22786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2279c609719bSwdenk Physical start address of Flash memory. 2280c609719bSwdenk 22816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2282c609719bSwdenk Physical start address of boot monitor code (set by 2283c609719bSwdenk make config files to be same as the text base address 228414d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 22856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2286c609719bSwdenk 22876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 22883b57fe0aSwdenk Size of memory reserved for monitor code, used to 22893b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 22903b57fe0aSwdenk embedded within the U-Boot image, or in a separate 22913b57fe0aSwdenk flash sector. 2292c609719bSwdenk 22936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2294c609719bSwdenk Size of DRAM reserved for malloc() use. 2295c609719bSwdenk 22966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 229715940c9aSStefan Roese Normally compressed uImages are limited to an 229815940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 22996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 230015940c9aSStefan Roese to adjust this setting to your needs. 2301c609719bSwdenk 23026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2303c609719bSwdenk Maximum size of memory mapped by the startup code of 2304c609719bSwdenk the Linux kernel; all data that must be processed by 23057d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 23067d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 23077d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 23087d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 23096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. 2310c609719bSwdenk 2311fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2312fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2313fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2314fca43cc8SJohn Rigby is enabled. 2315fca43cc8SJohn Rigby 2316fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2317fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2318fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2319fca43cc8SJohn Rigby 2320fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2321fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2322fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2323fca43cc8SJohn Rigby 23246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2325c609719bSwdenk Max number of Flash memory banks 2326c609719bSwdenk 23276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2328c609719bSwdenk Max number of sectors on a Flash chip 2329c609719bSwdenk 23306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2331c609719bSwdenk Timeout for Flash erase operations (in ms) 2332c609719bSwdenk 23336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2334c609719bSwdenk Timeout for Flash write operations (in ms) 2335c609719bSwdenk 23366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 23378564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 23388564acf9Swdenk 23396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 23408564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 23418564acf9Swdenk 23426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 23438564acf9Swdenk If defined, hardware flash sectors protection is used 23448564acf9Swdenk instead of U-Boot software protection. 23458564acf9Swdenk 23466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2347c609719bSwdenk 2348c609719bSwdenk Enable TFTP transfers directly to flash memory; 2349c609719bSwdenk without this option such a download has to be 2350c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2351c609719bSwdenk copy from RAM to flash. 2352c609719bSwdenk 2353c609719bSwdenk The two-step approach is usually more reliable, since 2354c609719bSwdenk you can check if the download worked before you erase 235511ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 235611ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2357c609719bSwdenk downloaded image) this option may be very useful. 2358c609719bSwdenk 23596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2360c609719bSwdenk Define if the flash driver uses extra elements in the 23615653fc33Swdenk common flash structure for storing flash geometry. 23625653fc33Swdenk 236300b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 23645653fc33Swdenk This option also enables the building of the cfi_flash driver 23655653fc33Swdenk in the drivers directory 236653cf9435Sstroese 236791809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 236891809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 236991809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 237091809ed5SPiotr Ziecik to the MTD layer. 237191809ed5SPiotr Ziecik 23726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 237396ef831fSGuennadi Liakhovetski Use buffered writes to flash. 237496ef831fSGuennadi Liakhovetski 237596ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 237696ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 237796ef831fSGuennadi Liakhovetski write commands. 237896ef831fSGuennadi Liakhovetski 23796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 23805568e613SStefan Roese If this option is defined, the common CFI flash doesn't 23815568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 23825568e613SStefan Roese is useful, if some of the configured banks are only 23835568e613SStefan Roese optionally available. 23845568e613SStefan Roese 23859a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 23869a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 23879a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 23889a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 23899a042e9cSJerry Van Baren 23906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 239111ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 239211ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 239353cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 239453cf9435Sstroese buffers can be full shortly after enabling the interface 239511ccc33fSMarcel Ziswiler on high Ethernet traffic. 239653cf9435Sstroese Defaults to 4 if not defined. 2397c609719bSwdenk 2398ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2399ea882bafSWolfgang Denk 2400ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2401ea882bafSWolfgang Denk internally to store the environment settings. The default 2402ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2403ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2404ea882bafSWolfgang Denk lib/hashtable.c for details. 2405ea882bafSWolfgang Denk 2406c609719bSwdenkThe following definitions that deal with the placement and management 2407c609719bSwdenkof environment data (variable area); in general, we support the 2408c609719bSwdenkfollowing configurations: 2409c609719bSwdenk 24105a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2411c609719bSwdenk 2412c609719bSwdenk Define this if the environment is in flash memory. 2413c609719bSwdenk 2414c609719bSwdenk a) The environment occupies one whole flash sector, which is 2415c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2416c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2417c609719bSwdenk sector" type flash chips, which have several smaller 2418c609719bSwdenk sectors at the start or the end. For instance, such a 2419c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2420c609719bSwdenk such a case you would place the environment in one of the 2421c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2422c609719bSwdenk "top boot sector" type flash chips, you would put the 2423c609719bSwdenk environment in one of the last sectors, leaving a gap 2424c609719bSwdenk between U-Boot and the environment. 2425c609719bSwdenk 24260e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2427c609719bSwdenk 2428c609719bSwdenk Offset of environment data (variable area) to the 2429c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2430c609719bSwdenk type flash chips the second sector can be used: the offset 2431c609719bSwdenk for this sector is given here. 2432c609719bSwdenk 24336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2434c609719bSwdenk 24350e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2436c609719bSwdenk 2437c609719bSwdenk This is just another way to specify the start address of 2438c609719bSwdenk the flash sector containing the environment (instead of 24390e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2440c609719bSwdenk 24410e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2442c609719bSwdenk 2443c609719bSwdenk Size of the sector containing the environment. 2444c609719bSwdenk 2445c609719bSwdenk 2446c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2447c609719bSwdenk In such a case you don't want to spend a whole sector for 2448c609719bSwdenk the environment. 2449c609719bSwdenk 24500e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2451c609719bSwdenk 24525a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 24530e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2454c609719bSwdenk of this flash sector for the environment. This saves 2455c609719bSwdenk memory for the RAM copy of the environment. 2456c609719bSwdenk 2457c609719bSwdenk It may also save flash memory if you decide to use this 2458c609719bSwdenk when your environment is "embedded" within U-Boot code, 2459c609719bSwdenk since then the remainder of the flash sector could be used 2460c609719bSwdenk for U-Boot code. It should be pointed out that this is 2461c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2462c609719bSwdenk updating the environment in flash makes it always 2463c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2464c609719bSwdenk wrong before the contents has been restored from a copy in 2465c609719bSwdenk RAM, your target system will be dead. 2466c609719bSwdenk 24670e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 24680e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2469c609719bSwdenk 2470c609719bSwdenk These settings describe a second storage area used to hold 247111ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 24723e38691eSwdenk a valid backup copy in case there is a power failure during 2473c609719bSwdenk a "saveenv" operation. 2474c609719bSwdenk 2475c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2476c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2477c609719bSwdenkaccordingly! 2478c609719bSwdenk 2479c609719bSwdenk 24809314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2481c609719bSwdenk 2482c609719bSwdenk Define this if you have some non-volatile memory device 2483c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2484c609719bSwdenk environment. 2485c609719bSwdenk 24860e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 24870e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2488c609719bSwdenk 248911ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2490c609719bSwdenk want to use for environment. It is assumed that this memory 2491c609719bSwdenk can just be read and written to, without any special 2492c609719bSwdenk provision. 2493c609719bSwdenk 2494c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2495c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 249611ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2497c609719bSwdenkU-Boot will hang. 2498c609719bSwdenk 2499c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2500c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2501c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2502c609719bSwdenkto save the current settings. 2503c609719bSwdenk 2504c609719bSwdenk 2505bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2506c609719bSwdenk 2507c609719bSwdenk Use this if you have an EEPROM or similar serial access 2508c609719bSwdenk device and a driver for it. 2509c609719bSwdenk 25100e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 25110e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2512c609719bSwdenk 2513c609719bSwdenk These two #defines specify the offset and size of the 2514c609719bSwdenk environment area within the total memory of your EEPROM. 2515c609719bSwdenk 25166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2517c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2518c609719bSwdenk The default address is zero. 2519c609719bSwdenk 25206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2521c609719bSwdenk If defined, the number of bits used to address bytes in a 2522c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2523c609719bSwdenk would require six bits. 2524c609719bSwdenk 25256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2526c609719bSwdenk If defined, the number of milliseconds to delay between 2527c609719bSwdenk page writes. The default is zero milliseconds. 2528c609719bSwdenk 25296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2530c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2531c609719bSwdenk that this is NOT the chip address length! 2532c609719bSwdenk 25336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 25345cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 25355cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 25365cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 25375cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 25385cf91d6bSwdenk byte chips. 25395cf91d6bSwdenk 25405cf91d6bSwdenk Note that we consider the length of the address field to 25415cf91d6bSwdenk still be one byte because the extra address bits are hidden 25425cf91d6bSwdenk in the chip address. 25435cf91d6bSwdenk 25446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2545c609719bSwdenk The size in bytes of the EEPROM device. 2546c609719bSwdenk 2547548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 2548548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 2549548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 2550548738b4SHeiko Schocher 2551548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 2552548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 2553548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 2554548738b4SHeiko Schocher EEPROM. For example: 2555548738b4SHeiko Schocher 2556548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 2557548738b4SHeiko Schocher 2558548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 2559548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 2560c609719bSwdenk 2561057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 25625779d8d9Swdenk 25635779d8d9Swdenk Define this if you have a DataFlash memory device which you 25645779d8d9Swdenk want to use for the environment. 25655779d8d9Swdenk 25660e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 25670e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 25680e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 25695779d8d9Swdenk 25705779d8d9Swdenk These three #defines specify the offset and size of the 25715779d8d9Swdenk environment area within the total memory of your DataFlash placed 25725779d8d9Swdenk at the specified address. 25735779d8d9Swdenk 257451bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 257513a5695bSwdenk 257613a5695bSwdenk Define this if you have a NAND device which you want to use 257713a5695bSwdenk for the environment. 257813a5695bSwdenk 25790e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 25800e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 258113a5695bSwdenk 258213a5695bSwdenk These two #defines specify the offset and size of the environment 2583fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 2584fdd813deSScott Wood aligned to an erase block boundary. 25855779d8d9Swdenk 2586fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 2587e443c944SMarkus Klotzbuecher 25880e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2589fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 2590fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 2591fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 2592fdd813deSScott Wood aligned to an erase block boundary. 2593e443c944SMarkus Klotzbuecher 2594fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 2595fdd813deSScott Wood 2596fdd813deSScott Wood Specifies the length of the region in which the environment 2597fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 2598fdd813deSScott Wood block size. Specifying a range with more erase blocks than 2599fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 2600fdd813deSScott Wood the range to be avoided. 2601fdd813deSScott Wood 2602fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 2603fdd813deSScott Wood 2604fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 2605fdd813deSScott Wood environment from block zero's out-of-band data. The 2606fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 2607fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 2608fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 2609e443c944SMarkus Klotzbuecher 2610b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 2611b74ab737SGuennadi Liakhovetski 2612b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 2613b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 2614b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 2615b74ab737SGuennadi Liakhovetski 26166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 2617c609719bSwdenk 2618c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2619c609719bSwdenk area is used at an early stage (ROM part) if the environment 2620c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2621c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2622c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2623c609719bSwdenk to be a good choice since it makes it far enough from the 2624c609719bSwdenk start of the data area as well as from the stack pointer. 2625c609719bSwdenk 2626e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2627c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2628cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 2629c609719bSwdenkuntil then to read environment variables. 2630c609719bSwdenk 263185ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 263285ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 263385ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 263485ec0bccSwdenknecessary, because the first environment variable we need is the 263585ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 263685ec0bccSwdenkhave any device yet where we could complain.] 2637c609719bSwdenk 2638c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2639c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 264085ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2641c609719bSwdenk 26426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 2643fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2644fc3e2165Swdenk 26456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 2646fc3e2165Swdenk also needs to be defined. 2647fc3e2165Swdenk 26486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 2649fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2650c609719bSwdenk 2651f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 2652f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 2653f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 2654f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 2655f5675aa5SRon Madrid space for already greatly restricted images, including but not 2656f5675aa5SRon Madrid limited to NAND_SPL configurations. 2657f5675aa5SRon Madrid 2658c609719bSwdenkLow Level (hardware related) configuration options: 2659dc7c9a1aSwdenk--------------------------------------------------- 2660c609719bSwdenk 26616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 2662c609719bSwdenk Cache Line Size of the CPU. 2663c609719bSwdenk 26646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 2665c609719bSwdenk Default address of the IMMR after system reset. 26662535d602Swdenk 26672535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 26682535d602Swdenk and RPXsuper) to be able to adjust the position of 26692535d602Swdenk the IMMR register after a reset. 2670c609719bSwdenk 26717f6c2cbcSwdenk- Floppy Disk Support: 26726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 26737f6c2cbcSwdenk 26747f6c2cbcSwdenk the default drive number (default value 0) 26757f6c2cbcSwdenk 26766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 26777f6c2cbcSwdenk 267811ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 26797f6c2cbcSwdenk (default value 1) 26807f6c2cbcSwdenk 26816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 26827f6c2cbcSwdenk 26837f6c2cbcSwdenk defines the offset of register from address. It 26847f6c2cbcSwdenk depends on which part of the data bus is connected to 268511ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 26867f6c2cbcSwdenk 26876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 26886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 26897f6c2cbcSwdenk default value. 26907f6c2cbcSwdenk 26916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 26927f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 26937f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 26947f6c2cbcSwdenk source code. It is used to make hardware dependant 26957f6c2cbcSwdenk initializations. 26967f6c2cbcSwdenk 26976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 269825d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 269925d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2700c609719bSwdenk 27016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 2702c609719bSwdenk 27037152b1d0Swdenk Start address of memory area that can be used for 2704c609719bSwdenk initial data and stack; please note that this must be 2705c609719bSwdenk writable memory that is working WITHOUT special 2706c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2707c609719bSwdenk will become available only after programming the 2708c609719bSwdenk memory controller and running certain initialization 2709c609719bSwdenk sequences. 2710c609719bSwdenk 2711c609719bSwdenk U-Boot uses the following memory types: 2712c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2713c609719bSwdenk - MPC824X: data cache 2714c609719bSwdenk - PPC4xx: data cache 2715c609719bSwdenk 27166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 2717c609719bSwdenk 2718c609719bSwdenk Offset of the initial data structure in the memory 27196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 27206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 2721c609719bSwdenk data is located at the end of the available space 2722553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 27236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 27246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 27256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 2726c609719bSwdenk 2727c609719bSwdenk Note: 2728c609719bSwdenk On the MPC824X (or other systems that use the data 2729c609719bSwdenk cache for initial memory) the address chosen for 27306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 2731c609719bSwdenk point to an otherwise UNUSED address space between 2732c609719bSwdenk the top of RAM and the start of the PCI space. 2733c609719bSwdenk 27346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 2735c609719bSwdenk 27366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 2737c609719bSwdenk 27386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 2739c609719bSwdenk 27406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 2741c609719bSwdenk 27426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 2743c609719bSwdenk 27446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 2745c609719bSwdenk 27466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 2747c609719bSwdenk SDRAM timing 2748c609719bSwdenk 27496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 2750c609719bSwdenk periodic timer for refresh 2751c609719bSwdenk 27526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 2753c609719bSwdenk 27546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 27556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 27566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 27576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 2758c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 2759c609719bSwdenk 2760c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 27616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 27626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 2763c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 2764c609719bSwdenk 27656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 27666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 2767c609719bSwdenk Machine Mode Register and Memory Periodic Timer 2768c609719bSwdenk Prescaler definitions (SDRAM timing) 2769c609719bSwdenk 27706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 2771c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 2772c609719bSwdenk define relocation offset in DPRAM [DSP2] 2773c609719bSwdenk 27746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 2775b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 2776b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 2777b423d055SHeiko Schocher 27786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 2779c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 2780c609719bSwdenk define relocation offset in DPRAM [SCC4] 2781c609719bSwdenk 27826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 2783c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 2784c609719bSwdenk wrong setting might damage your board. Read 2785c609719bSwdenk doc/README.MBX before setting this variable! 2786c609719bSwdenk 27876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 2788ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 2789ea909b76Swdenk (Power On Self Tests). This definition overrides 2790ea909b76Swdenk #define'd default value in commproc.h resp. 2791ea909b76Swdenk cpm_8260.h. 2792ea909b76Swdenk 27936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 27946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 27956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 27966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 27976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 27986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 27996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 28006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 2801a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 28025d232d0eSwdenk 28039cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 28049cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 28059cacf4fcSDirk Eibach required. 28069cacf4fcSDirk Eibach 2807a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 2808a09b9b68SKumar Gala Chip has SRIO or not 2809a09b9b68SKumar Gala 2810a09b9b68SKumar Gala- CONFIG_SRIO1: 2811a09b9b68SKumar Gala Board has SRIO 1 port available 2812a09b9b68SKumar Gala 2813a09b9b68SKumar Gala- CONFIG_SRIO2: 2814a09b9b68SKumar Gala Board has SRIO 2 port available 2815a09b9b68SKumar Gala 2816a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 2817a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 2818a09b9b68SKumar Gala 2819a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 2820a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 2821a09b9b68SKumar Gala 2822a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 2823a09b9b68SKumar Gala Size of SRIO port 'n' memory region 2824a09b9b68SKumar Gala 2825bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 2826218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 2827218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 2828218ca724SWolfgang Denk 2829bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 2830bb99ad6dSBen Warren I2C address of the SPD EEPROM 2831bb99ad6dSBen Warren 28326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 2833218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 2834218ca724SWolfgang Denk one, specify here. Note that the value must resolve 2835218ca724SWolfgang Denk to something your driver can deal with. 2836bb99ad6dSBen Warren 28376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 2838218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 2839218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 28402ad6b513STimur Tabi 2841c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 2842c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 2843c26e454dSwdenk 2844c26e454dSwdenk- CONFIG_FEC[12]_PHY 2845c26e454dSwdenk Define to the hardcoded PHY address which corresponds 28466e592385Swdenk to the given FEC; i. e. 2847c26e454dSwdenk #define CONFIG_FEC1_PHY 4 2848c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 2849c26e454dSwdenk 2850c26e454dSwdenk When set to -1, means to probe for first available. 2851c26e454dSwdenk 2852c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 2853c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 2854c26e454dSwdenk (so program the FEC to ignore it). 2855c26e454dSwdenk 2856c26e454dSwdenk- CONFIG_RMII 2857c26e454dSwdenk Enable RMII mode for all FECs. 2858c26e454dSwdenk Note that this is a global option, we can't 2859c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 2860c26e454dSwdenk 28615cf91d6bSwdenk- CONFIG_CRC32_VERIFY 28625cf91d6bSwdenk Add a verify option to the crc32 command. 28635cf91d6bSwdenk The syntax is: 28645cf91d6bSwdenk 28655cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 28665cf91d6bSwdenk 28675cf91d6bSwdenk Where address/count indicate a memory area 28685cf91d6bSwdenk and crc32 is the correct crc32 which the 28695cf91d6bSwdenk area should have. 28705cf91d6bSwdenk 287156523f12Swdenk- CONFIG_LOOPW 287256523f12Swdenk Add the "loopw" memory command. This only takes effect if 2873602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 287456523f12Swdenk 28757b466641Sstroese- CONFIG_MX_CYCLIC 28767b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 28777b466641Sstroese "md/mw" commands. 28787b466641Sstroese Examples: 28797b466641Sstroese 28807b466641Sstroese => mdc.b 10 4 500 28817b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 28827b466641Sstroese 28837b466641Sstroese => mwc.l 100 12345678 10 28847b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 28857b466641Sstroese 28867b466641Sstroese This only takes effect if the memory commands are activated 2887602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 28887b466641Sstroese 28898aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 2890e03f3169SWolfgang Denk [ARM only] If this variable is defined, then certain 2891e03f3169SWolfgang Denk low level initializations (like setting up the memory 2892e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 2893e03f3169SWolfgang Denk relocate itself into RAM. 28948aa1a2d1Swdenk 2895e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 2896e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 2897e03f3169SWolfgang Denk other boot loader or by a debugger which performs 2898e03f3169SWolfgang Denk these initializations itself. 28998aa1a2d1Swdenk 2900df81238bSMagnus Lilja- CONFIG_PRELOADER 2901df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 2902df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 2903df81238bSMagnus Lilja compiling a NAND SPL. 2904400558b5Swdenk 2905c609719bSwdenkBuilding the Software: 2906c609719bSwdenk====================== 2907c609719bSwdenk 2908218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 2909218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 2910218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 2911218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 2912218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 2913218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 2914c609719bSwdenk 2915218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 2916218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 2917218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 2918218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 2919218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 2920c609719bSwdenk 2921218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 2922218ca724SWolfgang Denk $ export CROSS_COMPILE 2923c609719bSwdenk 29242f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 29252f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 29262f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 29272f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 29282f8d396bSPeter Tyser 29292f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 29302f8d396bSPeter Tyser 29312f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 29322f8d396bSPeter Tyser be executed on computers running Windows. 29332f8d396bSPeter Tyser 2934c609719bSwdenkU-Boot is intended to be simple to build. After installing the 2935c609719bSwdenksources you must configure U-Boot for one specific board type. This 2936c609719bSwdenkis done by typing: 2937c609719bSwdenk 2938c609719bSwdenk make NAME_config 2939c609719bSwdenk 2940218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 2941218ca724SWolfgang Denkrations; see the main Makefile for supported names. 294254387ac9Swdenk 2943c609719bSwdenkNote: for some board special configuration names may exist; check if 2944c609719bSwdenk additional information is available from the board vendor; for 29452729af9dSwdenk instance, the TQM823L systems are available without (standard) 29462729af9dSwdenk or with LCD support. You can select such additional "features" 294711ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 2948c609719bSwdenk 29492729af9dSwdenk make TQM823L_config 29502729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 2951c609719bSwdenk 2952c609719bSwdenk make TQM823L_LCD_config 2953c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 2954c609719bSwdenk 2955c609719bSwdenk etc. 2956c609719bSwdenk 2957c609719bSwdenk 2958c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 29597152b1d0Swdenkimages ready for download to / installation on your system: 2960c609719bSwdenk 2961c609719bSwdenk- "u-boot.bin" is a raw binary image 2962c609719bSwdenk- "u-boot" is an image in ELF binary format 2963c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 2964c609719bSwdenk 2965baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 2966baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 2967baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 2968baf31249SMarian Balakowicz 2969baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 2970baf31249SMarian Balakowicz 2971baf31249SMarian Balakowicz make O=/tmp/build distclean 2972baf31249SMarian Balakowicz make O=/tmp/build NAME_config 2973baf31249SMarian Balakowicz make O=/tmp/build all 2974baf31249SMarian Balakowicz 2975baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 2976baf31249SMarian Balakowicz 2977baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2978baf31249SMarian Balakowicz make distclean 2979baf31249SMarian Balakowicz make NAME_config 2980baf31249SMarian Balakowicz make all 2981baf31249SMarian Balakowicz 2982baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 2983baf31249SMarian Balakowiczvariable. 2984baf31249SMarian Balakowicz 2985c609719bSwdenk 2986c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 2987c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 2988c609719bSwdenknative "make". 2989c609719bSwdenk 2990c609719bSwdenk 2991c609719bSwdenkIf the system board that you have is not listed, then you will need 2992c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 2993c609719bSwdenksteps: 2994c609719bSwdenk 2995c609719bSwdenk1. Add a new configuration option for your board to the toplevel 299685ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 299785ec0bccSwdenk entries as examples. Note that here and at many other places 29987152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 299985ec0bccSwdenk keep this order. 3000c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 300185ec0bccSwdenk files you need. In your board directory, you will need at least 300285ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 300385ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 300485ec0bccSwdenk your board 3005c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3006c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 300785ec0bccSwdenk4. Run "make <board>_config" with your new name. 3008c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3009c609719bSwdenk to be installed on your target system. 301085ec0bccSwdenk6. Debug and solve any problems that might arise. 3011c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3012c609719bSwdenk 3013c609719bSwdenk 3014c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3015c609719bSwdenk============================================================== 3016c609719bSwdenk 3017c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3018c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3019c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3020c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3021218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3022c609719bSwdenk 3023c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3024c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3025c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3026c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3027c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 30287152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3029218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3030218ca724SWolfgang Denkyou can type 3031c609719bSwdenk 3032c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3033c609719bSwdenk 3034c609719bSwdenkor to build on a native PowerPC system you can type 3035c609719bSwdenk 3036c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3037c609719bSwdenk 3038218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3039218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3040218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3041218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3042218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3043218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3044218ca724SWolfgang Denkvariable. For example: 3045baf31249SMarian Balakowicz 3046baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3047baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3048baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3049baf31249SMarian Balakowicz 3050218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3051218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3052218ca724SWolfgang Denkduring the whole build process. 3053baf31249SMarian Balakowicz 3054baf31249SMarian Balakowicz 3055c609719bSwdenkSee also "U-Boot Porting Guide" below. 3056c609719bSwdenk 3057c609719bSwdenk 3058c609719bSwdenkMonitor Commands - Overview: 3059c609719bSwdenk============================ 3060c609719bSwdenk 3061c609719bSwdenkgo - start application at address 'addr' 3062c609719bSwdenkrun - run commands in an environment variable 3063c609719bSwdenkbootm - boot application image from memory 3064c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3065c609719bSwdenktftpboot- boot image via network using TFTP protocol 3066c609719bSwdenk and env variables "ipaddr" and "serverip" 3067c609719bSwdenk (and eventually "gatewayip") 3068c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3069c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3070c609719bSwdenkloads - load S-Record file over serial line 3071c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3072c609719bSwdenkmd - memory display 3073c609719bSwdenkmm - memory modify (auto-incrementing) 3074c609719bSwdenknm - memory modify (constant address) 3075c609719bSwdenkmw - memory write (fill) 3076c609719bSwdenkcp - memory copy 3077c609719bSwdenkcmp - memory compare 3078c609719bSwdenkcrc32 - checksum calculation 30790f89c54bSPeter Tyseri2c - I2C sub-system 3080c609719bSwdenksspi - SPI utility commands 3081c609719bSwdenkbase - print or set address offset 3082c609719bSwdenkprintenv- print environment variables 3083c609719bSwdenksetenv - set environment variables 3084c609719bSwdenksaveenv - save environment variables to persistent storage 3085c609719bSwdenkprotect - enable or disable FLASH write protection 3086c609719bSwdenkerase - erase FLASH memory 3087c609719bSwdenkflinfo - print FLASH memory information 3088c609719bSwdenkbdinfo - print Board Info structure 3089c609719bSwdenkiminfo - print header information for application image 3090c609719bSwdenkconinfo - print console devices and informations 3091c609719bSwdenkide - IDE sub-system 3092c609719bSwdenkloop - infinite loop on address range 309356523f12Swdenkloopw - infinite write loop on address range 3094c609719bSwdenkmtest - simple RAM test 3095c609719bSwdenkicache - enable or disable instruction cache 3096c609719bSwdenkdcache - enable or disable data cache 3097c609719bSwdenkreset - Perform RESET of the CPU 3098c609719bSwdenkecho - echo args to console 3099c609719bSwdenkversion - print monitor version 3100c609719bSwdenkhelp - print online help 3101c609719bSwdenk? - alias for 'help' 3102c609719bSwdenk 3103c609719bSwdenk 3104c609719bSwdenkMonitor Commands - Detailed Description: 3105c609719bSwdenk======================================== 3106c609719bSwdenk 3107c609719bSwdenkTODO. 3108c609719bSwdenk 3109c609719bSwdenkFor now: just type "help <command>". 3110c609719bSwdenk 3111c609719bSwdenk 3112c609719bSwdenkEnvironment Variables: 3113c609719bSwdenk====================== 3114c609719bSwdenk 3115c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3116c609719bSwdenkcan be made persistent by saving to Flash memory. 3117c609719bSwdenk 3118c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3119c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3120c609719bSwdenkwithout a value can be used to delete a variable from the 3121c609719bSwdenkenvironment. As long as you don't save the environment you are 3122c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3123c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3124c609719bSwdenk 3125c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3126c96f86eeSWolfgang Denk 3127c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3128c609719bSwdenk 3129c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3130c609719bSwdenk 3131c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3132c609719bSwdenk 3133c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3134c609719bSwdenk 3135c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3136c609719bSwdenk 3137c609719bSwdenk bootfile - Name of the image to load with TFTP 3138c609719bSwdenk 31397d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 31407d721e34SBartlomiej Sieka command can be restricted. This variable is given as 31417d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 31427d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 31437d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 31447d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 31456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD kernel -- see the description of CONFIG_SYS_BOOTMAPSZ. 31467d721e34SBartlomiej Sieka 31477d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 31487d721e34SBartlomiej Sieka command can be restricted. This variable is given as 31497d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 31507d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 31517d721e34SBartlomiej Sieka environment variable. 31527d721e34SBartlomiej Sieka 31534bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 31544bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 31554bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 31564bae9090SBartlomiej Sieka 3157c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3158c609719bSwdenk "bootp" will just load perform a lookup of the 3159c609719bSwdenk configuration from the BOOTP server, but not try to 3160c609719bSwdenk load any image using TFTP 3161c609719bSwdenk 3162c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3163c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3164c609719bSwdenk be automatically started (by internally calling 3165c609719bSwdenk "bootm") 3166c609719bSwdenk 31674a6fd34bSwdenk If set to "no", a standalone image passed to the 31684a6fd34bSwdenk "bootm" command will be copied to the load address 31694a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 31704a6fd34bSwdenk This can be used to load and uncompress arbitrary 31714a6fd34bSwdenk data. 31724a6fd34bSwdenk 317317ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 317417ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 317517ea1177Swdenk mode (400kHZ). This environment variable is used in 317617ea1177Swdenk initialization code. So, for changes to be effective 317717ea1177Swdenk it must be saved and board must be reset. 317817ea1177Swdenk 3179c609719bSwdenk initrd_high - restrict positioning of initrd images: 3180c609719bSwdenk If this variable is not set, initrd images will be 3181c609719bSwdenk copied to the highest possible address in RAM; this 3182c609719bSwdenk is usually what you want since it allows for 3183c609719bSwdenk maximum initrd size. If for some reason you want to 3184c609719bSwdenk make sure that the initrd image is loaded below the 31856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3186c609719bSwdenk variable to a value of "no" or "off" or "0". 3187c609719bSwdenk Alternatively, you can set it to a maximum upper 3188c609719bSwdenk address to use (U-Boot will still check that it 3189c609719bSwdenk does not overwrite the U-Boot stack and data). 3190c609719bSwdenk 3191c609719bSwdenk For instance, when you have a system with 16 MB 31927152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3193c609719bSwdenk you can do this by adding "mem=12M" to the value of 3194c609719bSwdenk the "bootargs" variable. However, now you must make 31957152b1d0Swdenk sure that the initrd image is placed in the first 3196c609719bSwdenk 12 MB as well - this can be done with 3197c609719bSwdenk 3198c609719bSwdenk setenv initrd_high 00c00000 3199c609719bSwdenk 320038b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 320138b99261Swdenk indication to U-Boot that all addresses are legal 320238b99261Swdenk for the Linux kernel, including addresses in flash 320338b99261Swdenk memory. In this case U-Boot will NOT COPY the 320438b99261Swdenk ramdisk at all. This may be useful to reduce the 320538b99261Swdenk boot time on your system, but requires that this 320638b99261Swdenk feature is supported by your Linux kernel. 320738b99261Swdenk 3208c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3209c609719bSwdenk 3210c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3211dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3212c609719bSwdenk 3213c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3214c609719bSwdenk 3215c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3216c609719bSwdenk 3217c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3218c609719bSwdenk 3219c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3220c609719bSwdenk 3221c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3222c609719bSwdenk 3223a3d991bdSwdenk ethprime - When CONFIG_NET_MULTI is enabled controls which 3224a3d991bdSwdenk interface is used first. 3225a3d991bdSwdenk 3226a3d991bdSwdenk ethact - When CONFIG_NET_MULTI is enabled controls which 3227a3d991bdSwdenk interface is currently active. For example you 3228a3d991bdSwdenk can do the following 3229a3d991bdSwdenk 323048690d80SHeiko Schocher => setenv ethact FEC 323148690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 323248690d80SHeiko Schocher => setenv ethact SCC 323348690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3234a3d991bdSwdenk 3235e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3236e1692577SMatthias Fuchs available network interfaces. 3237e1692577SMatthias Fuchs It just stays at the currently selected interface. 3238e1692577SMatthias Fuchs 3239a3d991bdSwdenk netretry - When set to "no" each network operation will 3240a3d991bdSwdenk either succeed or fail without retrying. 32416e592385Swdenk When set to "once" the network operation will 32426e592385Swdenk fail when all the available network interfaces 32436e592385Swdenk are tried once without success. 3244a3d991bdSwdenk Useful on scripts which control the retry operation 3245a3d991bdSwdenk themselves. 3246a3d991bdSwdenk 3247b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3248a1cf027aSJean-Christophe PLAGNIOL-VILLARD 324928cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3250ecb0ccd9SWolfgang Denk UDP source port. 3251ecb0ccd9SWolfgang Denk 325228cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 325328cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 325428cb9375SWolfgang Denk 3255c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3256c96f86eeSWolfgang Denk we use the TFTP server's default block size 3257c96f86eeSWolfgang Denk 3258c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3259c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3260c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3261c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3262c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3263c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3264c96f86eeSWolfgang Denk with unreliable TFTP servers. 3265c96f86eeSWolfgang Denk 3266a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 326711ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3268a3d991bdSwdenk VLAN tagged frames. 3269c609719bSwdenk 3270c609719bSwdenkThe following environment variables may be used and automatically 3271c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3272c609719bSwdenkdepending the information provided by your boot server: 3273c609719bSwdenk 3274c609719bSwdenk bootfile - see above 3275c609719bSwdenk dnsip - IP address of your Domain Name Server 3276fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3277c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3278c609719bSwdenk hostname - Target hostname 3279c609719bSwdenk ipaddr - see above 3280c609719bSwdenk netmask - Subnet Mask 3281c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3282c609719bSwdenk serverip - see above 3283c609719bSwdenk 3284c609719bSwdenk 3285c609719bSwdenkThere are two special Environment Variables: 3286c609719bSwdenk 3287c609719bSwdenk serial# - contains hardware identification information such 3288c609719bSwdenk as type string and/or serial number 3289c609719bSwdenk ethaddr - Ethernet address 3290c609719bSwdenk 3291c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3292c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3293c609719bSwdenkonce they have been set once. 3294c609719bSwdenk 3295c609719bSwdenk 3296c1551ea8SstroeseFurther special Environment Variables: 3297c1551ea8Sstroese 3298c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3299c1551ea8Sstroese with the "version" command. This variable is 3300c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3301c1551ea8Sstroese 3302c1551ea8Sstroese 3303c609719bSwdenkPlease note that changes to some configuration parameters may take 3304c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3305c609719bSwdenk 3306c609719bSwdenk 3307f07771ccSwdenkCommand Line Parsing: 3308f07771ccSwdenk===================== 3309f07771ccSwdenk 3310f07771ccSwdenkThere are two different command line parsers available with U-Boot: 33117152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3312f07771ccSwdenk 3313f07771ccSwdenkOld, simple command line parser: 3314f07771ccSwdenk-------------------------------- 3315f07771ccSwdenk 3316f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3317f07771ccSwdenk- several commands on one line, separated by ';' 3318fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3319f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3320f07771ccSwdenk for example: 3321fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3322f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3323f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3324f07771ccSwdenk 3325f07771ccSwdenkHush shell: 3326f07771ccSwdenk----------- 3327f07771ccSwdenk 3328f07771ccSwdenk- similar to Bourne shell, with control structures like 3329f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3330f07771ccSwdenk until...do...done, ... 3331f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3332f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3333f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3334f07771ccSwdenk command 3335f07771ccSwdenk 3336f07771ccSwdenkGeneral rules: 3337f07771ccSwdenk-------------- 3338f07771ccSwdenk 3339f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3340f07771ccSwdenk command) contains several commands separated by semicolon, and 3341f07771ccSwdenk one of these commands fails, then the remaining commands will be 3342f07771ccSwdenk executed anyway. 3343f07771ccSwdenk 3344f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 334511ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3346f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3347f07771ccSwdenk variables are not executed. 3348f07771ccSwdenk 3349c609719bSwdenkNote for Redundant Ethernet Interfaces: 3350c609719bSwdenk======================================= 3351c609719bSwdenk 335211ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3353c609719bSwdenksuch configurations and is capable of automatic selection of a 33547152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3355c609719bSwdenk 3356c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3357c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3358c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3359c609719bSwdenk 3360c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3361c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3362c609719bSwdenkding setting in the environment; if the corresponding environment 3363c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3364c609719bSwdenk 3365c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3366c609719bSwdenk environment, the SROM's address is used. 3367c609719bSwdenk 3368c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3369c609719bSwdenk environment exists, then the value from the environment variable is 3370c609719bSwdenk used. 3371c609719bSwdenk 3372c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3373c609719bSwdenk both addresses are the same, this MAC address is used. 3374c609719bSwdenk 3375c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3376c609719bSwdenk addresses differ, the value from the environment is used and a 3377c609719bSwdenk warning is printed. 3378c609719bSwdenk 3379c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3380c609719bSwdenk is raised. 3381c609719bSwdenk 3382ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 3383ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 3384ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 3385ecee9324SBen WarrenThe naming convention is as follows: 3386ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 3387c609719bSwdenk 3388c609719bSwdenkImage Formats: 3389c609719bSwdenk============== 3390c609719bSwdenk 33913310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 33923310c549SMarian Balakowiczimages in two formats: 33933310c549SMarian Balakowicz 33943310c549SMarian BalakowiczNew uImage format (FIT) 33953310c549SMarian Balakowicz----------------------- 33963310c549SMarian Balakowicz 33973310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 33983310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 33993310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 34003310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 34013310c549SMarian Balakowicz 34023310c549SMarian Balakowicz 34033310c549SMarian BalakowiczOld uImage format 34043310c549SMarian Balakowicz----------------- 34053310c549SMarian Balakowicz 34063310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 34073310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 34083310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3409c609719bSwdenk 3410c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3411c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3412f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3413f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3414f5ed9e39SPeter Tyser INTEGRITY). 34157b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 34161117cbf2SThomas Chou IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 34171117cbf2SThomas Chou Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC). 3418c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3419c609719bSwdenk* Load Address 3420c609719bSwdenk* Entry Point 3421c609719bSwdenk* Image Name 3422c609719bSwdenk* Image Timestamp 3423c609719bSwdenk 3424c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3425c609719bSwdenkand the data portions of the image are secured against corruption by 3426c609719bSwdenkCRC32 checksums. 3427c609719bSwdenk 3428c609719bSwdenk 3429c609719bSwdenkLinux Support: 3430c609719bSwdenk============== 3431c609719bSwdenk 3432c609719bSwdenkAlthough U-Boot should support any OS or standalone application 34337152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3434c609719bSwdenkU-Boot. 3435c609719bSwdenk 3436c609719bSwdenkU-Boot includes many features that so far have been part of some 3437c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3438c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3439c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 34407152b1d0Swdenkserves several purposes: 3441c609719bSwdenk 3442c609719bSwdenk- the same features can be used for other OS or standalone 3443c609719bSwdenk applications (for instance: using compressed images to reduce the 3444c609719bSwdenk Flash memory footprint) 3445c609719bSwdenk 3446c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 34477152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 3448c609719bSwdenk 3449c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 3450c609719bSwdenk images; of course this also means that different kernel images can 3451c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 3452c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 3453c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3454c609719bSwdenk software is easier now. 3455c609719bSwdenk 3456c609719bSwdenk 3457c609719bSwdenkLinux HOWTO: 3458c609719bSwdenk============ 3459c609719bSwdenk 3460c609719bSwdenkPorting Linux to U-Boot based systems: 3461c609719bSwdenk--------------------------------------- 3462c609719bSwdenk 3463c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3464c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3465c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3466c609719bSwdenkLinux :-). 3467c609719bSwdenk 3468a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 3469c609719bSwdenk 3470c609719bSwdenkJust make sure your machine specific header file (for instance 3471c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 34721dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 34731dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 34746d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 3475c609719bSwdenk 3476c609719bSwdenk 3477c609719bSwdenkConfiguring the Linux kernel: 3478c609719bSwdenk----------------------------- 3479c609719bSwdenk 3480c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 3481c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 3482c609719bSwdenk 3483c609719bSwdenk 3484c609719bSwdenkBuilding a Linux Image: 3485c609719bSwdenk----------------------- 3486c609719bSwdenk 348724ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 348824ee89b9Swdenknot used. If you use recent kernel source, a new build target 348924ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 349024ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 349124ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 349224ee89b9Swdenk100% compatible format. 3493c609719bSwdenk 3494c609719bSwdenkExample: 3495c609719bSwdenk 3496c609719bSwdenk make TQM850L_config 3497c609719bSwdenk make oldconfig 3498c609719bSwdenk make dep 349924ee89b9Swdenk make uImage 3500c609719bSwdenk 350124ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 350224ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 350324ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 3504c609719bSwdenk 350524ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 350624ee89b9Swdenk 350724ee89b9Swdenk* convert the kernel into a raw binary image: 350824ee89b9Swdenk 350924ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 351024ee89b9Swdenk -R .note -R .comment \ 351124ee89b9Swdenk -S vmlinux linux.bin 351224ee89b9Swdenk 351324ee89b9Swdenk* compress the binary image: 351424ee89b9Swdenk 351524ee89b9Swdenk gzip -9 linux.bin 351624ee89b9Swdenk 351724ee89b9Swdenk* package compressed binary image for U-Boot: 351824ee89b9Swdenk 351924ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 352024ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 352124ee89b9Swdenk -d linux.bin.gz uImage 352224ee89b9Swdenk 352324ee89b9Swdenk 352424ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 352524ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 352624ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 352724ee89b9Swdenkbyte header containing information about target architecture, 352824ee89b9Swdenkoperating system, image type, compression method, entry points, time 352924ee89b9Swdenkstamp, CRC32 checksums, etc. 353024ee89b9Swdenk 353124ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 353224ee89b9Swdenkprint the header information, or to build new images. 3533c609719bSwdenk 3534c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 3535c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 3536c609719bSwdenkchecksum verification: 3537c609719bSwdenk 3538c609719bSwdenk tools/mkimage -l image 3539c609719bSwdenk -l ==> list image header information 3540c609719bSwdenk 3541c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 3542c609719bSwdenkfrom a "data file" which is used as image payload: 3543c609719bSwdenk 3544c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 3545c609719bSwdenk -n name -d data_file image 3546c609719bSwdenk -A ==> set architecture to 'arch' 3547c609719bSwdenk -O ==> set operating system to 'os' 3548c609719bSwdenk -T ==> set image type to 'type' 3549c609719bSwdenk -C ==> set compression type 'comp' 3550c609719bSwdenk -a ==> set load address to 'addr' (hex) 3551c609719bSwdenk -e ==> set entry point to 'ep' (hex) 3552c609719bSwdenk -n ==> set image name to 'name' 3553c609719bSwdenk -d ==> use image data from 'datafile' 3554c609719bSwdenk 355569459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 355669459791Swdenkaddress (0x00000000), but the entry point address depends on the 355769459791Swdenkkernel version: 3558c609719bSwdenk 3559c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 356024ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 3561c609719bSwdenk 3562c609719bSwdenkSo a typical call to build a U-Boot image would read: 3563c609719bSwdenk 356424ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 356524ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 3566a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 356724ee89b9Swdenk > examples/uImage.TQM850L 356824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3569c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3570c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3571c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3572c609719bSwdenk Load Address: 0x00000000 357324ee89b9Swdenk Entry Point: 0x00000000 3574c609719bSwdenk 3575c609719bSwdenkTo verify the contents of the image (or check for corruption): 3576c609719bSwdenk 357724ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 357824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3579c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3580c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3581c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3582c609719bSwdenk Load Address: 0x00000000 358324ee89b9Swdenk Entry Point: 0x00000000 3584c609719bSwdenk 3585c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 3586c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3587c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3588c609719bSwdenkneed to be uncompressed: 3589c609719bSwdenk 3590a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 359124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 359224ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 3593a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 359424ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 359524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3596c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3597c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3598c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3599c609719bSwdenk Load Address: 0x00000000 360024ee89b9Swdenk Entry Point: 0x00000000 3601c609719bSwdenk 3602c609719bSwdenk 3603c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3604c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3605c609719bSwdenk 3606c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3607c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3608c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3609c609719bSwdenk Image Name: Simple Ramdisk Image 3610c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3611c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3612c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3613c609719bSwdenk Load Address: 0x00000000 3614c609719bSwdenk Entry Point: 0x00000000 3615c609719bSwdenk 3616c609719bSwdenk 3617c609719bSwdenkInstalling a Linux Image: 3618c609719bSwdenk------------------------- 3619c609719bSwdenk 3620c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3621c609719bSwdenkyou must convert the image to S-Record format: 3622c609719bSwdenk 3623c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3624c609719bSwdenk 3625c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3626c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3627c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3628c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3629c609719bSwdenkcommand. 3630c609719bSwdenk 3631c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3632c609719bSwdenkTQM8xxL is in the first Flash bank): 3633c609719bSwdenk 3634c609719bSwdenk => erase 40100000 401FFFFF 3635c609719bSwdenk 3636c609719bSwdenk .......... done 3637c609719bSwdenk Erased 8 sectors 3638c609719bSwdenk 3639c609719bSwdenk => loads 40100000 3640c609719bSwdenk ## Ready for S-Record download ... 3641c609719bSwdenk ~>examples/image.srec 3642c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3643c609719bSwdenk ... 3644c609719bSwdenk 15989 15990 15991 15992 3645c609719bSwdenk [file transfer complete] 3646c609719bSwdenk [connected] 3647c609719bSwdenk ## Start Addr = 0x00000000 3648c609719bSwdenk 3649c609719bSwdenk 3650c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3651c609719bSwdenkthis includes a checksum verification so you can be sure no data 3652c609719bSwdenkcorruption happened: 3653c609719bSwdenk 3654c609719bSwdenk => imi 40100000 3655c609719bSwdenk 3656c609719bSwdenk ## Checking Image at 40100000 ... 3657c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3658c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3659c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3660c609719bSwdenk Load Address: 00000000 3661c609719bSwdenk Entry Point: 0000000c 3662c609719bSwdenk Verifying Checksum ... OK 3663c609719bSwdenk 3664c609719bSwdenk 3665c609719bSwdenkBoot Linux: 3666c609719bSwdenk----------- 3667c609719bSwdenk 3668c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 3669c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 3670c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 3671c609719bSwdenkparameters. You can check and modify this variable using the 3672c609719bSwdenk"printenv" and "setenv" commands: 3673c609719bSwdenk 3674c609719bSwdenk 3675c609719bSwdenk => printenv bootargs 3676c609719bSwdenk bootargs=root=/dev/ram 3677c609719bSwdenk 3678c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3679c609719bSwdenk 3680c609719bSwdenk => printenv bootargs 3681c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3682c609719bSwdenk 3683c609719bSwdenk => bootm 40020000 3684c609719bSwdenk ## Booting Linux kernel at 40020000 ... 3685c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 3686c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3687c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 3688c609719bSwdenk Load Address: 00000000 3689c609719bSwdenk Entry Point: 0000000c 3690c609719bSwdenk Verifying Checksum ... OK 3691c609719bSwdenk Uncompressing Kernel Image ... OK 3692c609719bSwdenk 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 3693c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3694c609719bSwdenk time_init: decrementer frequency = 187500000/60 3695c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3696c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 3697c609719bSwdenk ... 3698c609719bSwdenk 369911ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 37007152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 3701c609719bSwdenkformat!) to the "bootm" command: 3702c609719bSwdenk 3703c609719bSwdenk => imi 40100000 40200000 3704c609719bSwdenk 3705c609719bSwdenk ## Checking Image at 40100000 ... 3706c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3707c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3708c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3709c609719bSwdenk Load Address: 00000000 3710c609719bSwdenk Entry Point: 0000000c 3711c609719bSwdenk Verifying Checksum ... OK 3712c609719bSwdenk 3713c609719bSwdenk ## Checking Image at 40200000 ... 3714c609719bSwdenk Image Name: Simple Ramdisk Image 3715c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3716c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3717c609719bSwdenk Load Address: 00000000 3718c609719bSwdenk Entry Point: 00000000 3719c609719bSwdenk Verifying Checksum ... OK 3720c609719bSwdenk 3721c609719bSwdenk => bootm 40100000 40200000 3722c609719bSwdenk ## Booting Linux kernel at 40100000 ... 3723c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3724c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3725c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3726c609719bSwdenk Load Address: 00000000 3727c609719bSwdenk Entry Point: 0000000c 3728c609719bSwdenk Verifying Checksum ... OK 3729c609719bSwdenk Uncompressing Kernel Image ... OK 3730c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 3731c609719bSwdenk Image Name: Simple Ramdisk Image 3732c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3733c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3734c609719bSwdenk Load Address: 00000000 3735c609719bSwdenk Entry Point: 00000000 3736c609719bSwdenk Verifying Checksum ... OK 3737c609719bSwdenk Loading Ramdisk ... OK 3738c609719bSwdenk 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 3739c609719bSwdenk Boot arguments: root=/dev/ram 3740c609719bSwdenk time_init: decrementer frequency = 187500000/60 3741c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3742c609719bSwdenk ... 3743c609719bSwdenk RAMDISK: Compressed image found at block 0 3744c609719bSwdenk VFS: Mounted root (ext2 filesystem). 3745c609719bSwdenk 3746c609719bSwdenk bash# 3747c609719bSwdenk 37480267768eSMatthew McClintockBoot Linux and pass a flat device tree: 37490267768eSMatthew McClintock----------- 37500267768eSMatthew McClintock 37510267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 37520267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 37530267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 37540267768eSMatthew McClintockflat device tree: 37550267768eSMatthew McClintock 37560267768eSMatthew McClintock=> print oftaddr 37570267768eSMatthew McClintockoftaddr=0x300000 37580267768eSMatthew McClintock=> print oft 37590267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 37600267768eSMatthew McClintock=> tftp $oftaddr $oft 37610267768eSMatthew McClintockSpeed: 1000, full duplex 37620267768eSMatthew McClintockUsing TSEC0 device 37630267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 37640267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 37650267768eSMatthew McClintockLoad address: 0x300000 37660267768eSMatthew McClintockLoading: # 37670267768eSMatthew McClintockdone 37680267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 37690267768eSMatthew McClintock=> tftp $loadaddr $bootfile 37700267768eSMatthew McClintockSpeed: 1000, full duplex 37710267768eSMatthew McClintockUsing TSEC0 device 37720267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 37730267768eSMatthew McClintockFilename 'uImage'. 37740267768eSMatthew McClintockLoad address: 0x200000 37750267768eSMatthew McClintockLoading:############ 37760267768eSMatthew McClintockdone 37770267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 37780267768eSMatthew McClintock=> print loadaddr 37790267768eSMatthew McClintockloadaddr=200000 37800267768eSMatthew McClintock=> print oftaddr 37810267768eSMatthew McClintockoftaddr=0x300000 37820267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 37830267768eSMatthew McClintock## Booting image at 00200000 ... 37840267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 37850267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 37860267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 37870267768eSMatthew McClintock Load Address: 00000000 37880267768eSMatthew McClintock Entry Point: 00000000 37890267768eSMatthew McClintock Verifying Checksum ... OK 37900267768eSMatthew McClintock Uncompressing Kernel Image ... OK 37910267768eSMatthew McClintockBooting using flat device tree at 0x300000 37920267768eSMatthew McClintockUsing MPC85xx ADS machine description 37930267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 37940267768eSMatthew McClintock[snip] 37950267768eSMatthew McClintock 37960267768eSMatthew McClintock 37976069ff26SwdenkMore About U-Boot Image Types: 37986069ff26Swdenk------------------------------ 37996069ff26Swdenk 38006069ff26SwdenkU-Boot supports the following image types: 38016069ff26Swdenk 38026069ff26Swdenk "Standalone Programs" are directly runnable in the environment 38036069ff26Swdenk provided by U-Boot; it is expected that (if they behave 38046069ff26Swdenk well) you can continue to work in U-Boot after return from 38056069ff26Swdenk the Standalone Program. 38066069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 38076069ff26Swdenk will take over control completely. Usually these programs 38086069ff26Swdenk will install their own set of exception handlers, device 38096069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 38106069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 38116069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 38126069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 38136069ff26Swdenk being started. 38146069ff26Swdenk "Multi-File Images" contain several images, typically an OS 38156069ff26Swdenk (Linux) kernel image and one or more data images like 38166069ff26Swdenk RAMDisks. This construct is useful for instance when you want 38176069ff26Swdenk to boot over the network using BOOTP etc., where the boot 38186069ff26Swdenk server provides just a single image file, but you want to get 38196069ff26Swdenk for instance an OS kernel and a RAMDisk image. 38206069ff26Swdenk 38216069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 38226069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 38236069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 38246069ff26Swdenk Immediately after the terminating 0 follow the images, one by 38256069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 38266069ff26Swdenk a multiple of 4 bytes). 38276069ff26Swdenk 38286069ff26Swdenk "Firmware Images" are binary images containing firmware (like 38296069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 38306069ff26Swdenk flash memory. 38316069ff26Swdenk 38326069ff26Swdenk "Script files" are command sequences that will be executed by 38336069ff26Swdenk U-Boot's command interpreter; this feature is especially 38346069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 38356069ff26Swdenk as command interpreter. 38366069ff26Swdenk 3837c609719bSwdenk 3838c609719bSwdenkStandalone HOWTO: 3839c609719bSwdenk================= 3840c609719bSwdenk 3841c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 3842c609719bSwdenkrun "standalone" applications, which can use some resources of 3843c609719bSwdenkU-Boot like console I/O functions or interrupt services. 3844c609719bSwdenk 3845c609719bSwdenkTwo simple examples are included with the sources: 3846c609719bSwdenk 3847c609719bSwdenk"Hello World" Demo: 3848c609719bSwdenk------------------- 3849c609719bSwdenk 3850c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 3851c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 3852c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 3853c609719bSwdenklike that: 3854c609719bSwdenk 3855c609719bSwdenk => loads 3856c609719bSwdenk ## Ready for S-Record download ... 3857c609719bSwdenk ~>examples/hello_world.srec 3858c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3859c609719bSwdenk [file transfer complete] 3860c609719bSwdenk [connected] 3861c609719bSwdenk ## Start Addr = 0x00040004 3862c609719bSwdenk 3863c609719bSwdenk => go 40004 Hello World! This is a test. 3864c609719bSwdenk ## Starting application at 0x00040004 ... 3865c609719bSwdenk Hello World 3866c609719bSwdenk argc = 7 3867c609719bSwdenk argv[0] = "40004" 3868c609719bSwdenk argv[1] = "Hello" 3869c609719bSwdenk argv[2] = "World!" 3870c609719bSwdenk argv[3] = "This" 3871c609719bSwdenk argv[4] = "is" 3872c609719bSwdenk argv[5] = "a" 3873c609719bSwdenk argv[6] = "test." 3874c609719bSwdenk argv[7] = "<NULL>" 3875c609719bSwdenk Hit any key to exit ... 3876c609719bSwdenk 3877c609719bSwdenk ## Application terminated, rc = 0x0 3878c609719bSwdenk 3879c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 3880c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 3881c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 3882c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 3883c609719bSwdenkcharacter, but this is just a demo program. The application can be 3884c609719bSwdenkcontrolled by the following keys: 3885c609719bSwdenk 3886c609719bSwdenk ? - print current values og the CPM Timer registers 3887c609719bSwdenk b - enable interrupts and start timer 3888c609719bSwdenk e - stop timer and disable interrupts 3889c609719bSwdenk q - quit application 3890c609719bSwdenk 3891c609719bSwdenk => loads 3892c609719bSwdenk ## Ready for S-Record download ... 3893c609719bSwdenk ~>examples/timer.srec 3894c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3895c609719bSwdenk [file transfer complete] 3896c609719bSwdenk [connected] 3897c609719bSwdenk ## Start Addr = 0x00040004 3898c609719bSwdenk 3899c609719bSwdenk => go 40004 3900c609719bSwdenk ## Starting application at 0x00040004 ... 3901c609719bSwdenk TIMERS=0xfff00980 3902c609719bSwdenk Using timer 1 3903c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 3904c609719bSwdenk 3905c609719bSwdenkHit 'b': 3906c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 3907c609719bSwdenk Enabling timer 3908c609719bSwdenkHit '?': 3909c609719bSwdenk [q, b, e, ?] ........ 3910c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 3911c609719bSwdenkHit '?': 3912c609719bSwdenk [q, b, e, ?] . 3913c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 3914c609719bSwdenkHit '?': 3915c609719bSwdenk [q, b, e, ?] . 3916c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 3917c609719bSwdenkHit '?': 3918c609719bSwdenk [q, b, e, ?] . 3919c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 3920c609719bSwdenkHit 'e': 3921c609719bSwdenk [q, b, e, ?] ...Stopping timer 3922c609719bSwdenkHit 'q': 3923c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 3924c609719bSwdenk 3925c609719bSwdenk 392685ec0bccSwdenkMinicom warning: 392785ec0bccSwdenk================ 392885ec0bccSwdenk 39297152b1d0SwdenkOver time, many people have reported problems when trying to use the 393085ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 393185ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 3932f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 393385ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 393485ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 393585ec0bccSwdenk 393652f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 393752f52c14Swdenkconfiguration to your "File transfer protocols" section: 393852f52c14Swdenk 393952f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 394052f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 394152f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 394252f52c14Swdenk 394352f52c14Swdenk 3944c609719bSwdenkNetBSD Notes: 3945c609719bSwdenk============= 3946c609719bSwdenk 3947c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 3948c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 3949c609719bSwdenk 3950c609719bSwdenkBuilding requires a cross environment; it is known to work on 3951c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 3952c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 3953c609719bSwdenkNote that the cross-powerpc package does not install include files; 3954c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 3955c609719bSwdenkmissing. This file has to be installed and patched manually: 3956c609719bSwdenk 3957c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 3958c609719bSwdenk # mkdir powerpc 3959c609719bSwdenk # ln -s powerpc machine 3960c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 3961c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 3962c609719bSwdenk 3963c609719bSwdenkNative builds *don't* work due to incompatibilities between native 3964c609719bSwdenkand U-Boot include files. 3965c609719bSwdenk 3966c609719bSwdenkBooting assumes that (the first part of) the image booted is a 3967c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 3968c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 3969c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 39702a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 3971c609719bSwdenk 3972c609719bSwdenk 3973c609719bSwdenkImplementation Internals: 3974c609719bSwdenk========================= 3975c609719bSwdenk 3976c609719bSwdenkThe following is not intended to be a complete description of every 3977c609719bSwdenkimplementation detail. However, it should help to understand the 3978c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 3979c609719bSwdenkhardware. 3980c609719bSwdenk 3981c609719bSwdenk 3982c609719bSwdenkInitial Stack, Global Data: 3983c609719bSwdenk--------------------------- 3984c609719bSwdenk 3985c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 3986c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 3987c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 3988c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 3989c609719bSwdenkis not initialized as zero. To be able to get a C environment working 3990c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 3991c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 3992c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 3993c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 3994c609719bSwdenklocked as (mis-) used as memory, etc. 3995c609719bSwdenk 39967152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 39970668236bSWolfgang Denk U-Boot mailing list: 399843d9616cSwdenk 399943d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 400043d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 400143d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 400243d9616cSwdenk ... 400343d9616cSwdenk 400443d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 400543d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 400643d9616cSwdenk require any physical RAM backing up the cache. The cleverness 400743d9616cSwdenk is that the cache is being used as a temporary supply of 400843d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 400911ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 401043d9616cSwdenk can see how this works by studying the cache architecture and 401143d9616cSwdenk operation in the architecture and processor-specific manuals. 401243d9616cSwdenk 401343d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 401443d9616cSwdenk is another option for the system designer to use as an 401511ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 401643d9616cSwdenk option should work for you. Using CS 4 should be fine if your 401743d9616cSwdenk board designers haven't used it for something that would 401843d9616cSwdenk cause you grief during the initial boot! It is frequently not 401943d9616cSwdenk used. 402043d9616cSwdenk 40216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 402243d9616cSwdenk with your processor/board/system design. The default value 402343d9616cSwdenk you will find in any recent u-boot distribution in 40248a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 402543d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 402643d9616cSwdenk it above 400_0000. Just make sure your board has no resources 402743d9616cSwdenk that are supposed to respond to that address! That code in 402843d9616cSwdenk start.S has been around a while and should work as is when 402943d9616cSwdenk you get the config right. 403043d9616cSwdenk 403143d9616cSwdenk -Chris Hallinan 403243d9616cSwdenk DS4.COM, Inc. 403343d9616cSwdenk 4034c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4035c609719bSwdenkcode for the initialization procedures: 4036c609719bSwdenk 4037c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4038c609719bSwdenk to write it. 4039c609719bSwdenk 404011ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4041c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 40427152b1d0Swdenk zation is performed later (when relocating to RAM). 4043c609719bSwdenk 4044c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4045c609719bSwdenk that. 4046c609719bSwdenk 4047c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4048c609719bSwdenknormal global data to share information beween the code. But it 4049c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4050c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4051c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4052c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4053c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4054c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4055c609719bSwdenkreserve for this purpose. 4056c609719bSwdenk 40577152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4058c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4059c609719bSwdenkGCC's implementation. 4060c609719bSwdenk 4061c609719bSwdenkFor PowerPC, the following registers have specific use: 4062c609719bSwdenk R1: stack pointer 4063e7670f6cSWolfgang Denk R2: reserved for system use 4064c609719bSwdenk R3-R4: parameter passing and return values 4065c609719bSwdenk R5-R10: parameter passing 4066c609719bSwdenk R13: small data area pointer 4067c609719bSwdenk R30: GOT pointer 4068c609719bSwdenk R31: frame pointer 4069c609719bSwdenk 4070e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4071e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4072e6bee808SJoakim Tjernlund going back and forth between asm and C) 4073c609719bSwdenk 4074e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4075c609719bSwdenk 4076c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4077c609719bSwdenk address of the global data structure is known at compile time), 4078c609719bSwdenk but it turned out that reserving a register results in somewhat 4079c609719bSwdenk smaller code - although the code savings are not that big (on 4080c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4081c609719bSwdenk 624 text + 127 data). 4082c609719bSwdenk 4083c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 40844c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 40854c58eb55SMike Frysinger 4086c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 40874c58eb55SMike Frysinger 4088c609719bSwdenkOn ARM, the following registers are used: 4089c609719bSwdenk 4090c609719bSwdenk R0: function argument word/integer result 4091c609719bSwdenk R1-R3: function argument word 4092c609719bSwdenk R9: GOT pointer 4093c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4094c609719bSwdenk R11: argument (frame) pointer 4095c609719bSwdenk R12: temporary workspace 4096c609719bSwdenk R13: stack pointer 4097c609719bSwdenk R14: link register 4098c609719bSwdenk R15: program counter 4099c609719bSwdenk 4100c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4101c609719bSwdenk 41020df01fd3SThomas ChouOn Nios II, the ABI is documented here: 41030df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 41040df01fd3SThomas Chou 41050df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 41060df01fd3SThomas Chou 41070df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 41080df01fd3SThomas Chou to access small data sections, so gp is free. 41090df01fd3SThomas Chou 4110d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4111d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4112c609719bSwdenk 4113c609719bSwdenkMemory Management: 4114c609719bSwdenk------------------ 4115c609719bSwdenk 4116c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4117c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4118c609719bSwdenk 4119c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4120c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4121c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4122c609719bSwdenkphysical memory banks. 4123c609719bSwdenk 4124c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4125c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4126c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4127c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 41286d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4129c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4130c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4131c609719bSwdenk 4132c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4133c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4134c609719bSwdenk 4135c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4136c609719bSwdenkthis: 4137c609719bSwdenk 4138c609719bSwdenk 0x0000 0000 Exception Vector code 4139c609719bSwdenk : 4140c609719bSwdenk 0x0000 1FFF 4141c609719bSwdenk 0x0000 2000 Free for Application Use 4142c609719bSwdenk : 4143c609719bSwdenk : 4144c609719bSwdenk 4145c609719bSwdenk : 4146c609719bSwdenk : 4147c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4148c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4149c609719bSwdenk 0x00FC 0000 Malloc Arena 4150c609719bSwdenk : 4151c609719bSwdenk 0x00FD FFFF 4152c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4153c609719bSwdenk ... eventually: LCD or video framebuffer 4154c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4155c609719bSwdenk 0x00FF FFFF [End of RAM] 4156c609719bSwdenk 4157c609719bSwdenk 4158c609719bSwdenkSystem Initialization: 4159c609719bSwdenk---------------------- 4160c609719bSwdenk 4161c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 416211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4163c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 41647152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4165c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4166c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4167c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4168c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4169c609719bSwdenkthe caches and the SIU. 4170c609719bSwdenk 4171c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4172c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4173c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4174c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4175c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4176c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4177c609719bSwdenkbanks. 4178c609719bSwdenk 4179c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 41807152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4181c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4182c609719bSwdenk0x00000000, with any additional banks following immediately to create 4183c609719bSwdenkcontiguous memory starting from 0. 4184c609719bSwdenk 4185c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4186c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4187c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4188c609719bSwdenkpages, and the final stack is set up. 4189c609719bSwdenk 4190c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4191c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4192c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4193c609719bSwdenknew address in RAM. 4194c609719bSwdenk 4195c609719bSwdenk 4196c609719bSwdenkU-Boot Porting Guide: 4197c609719bSwdenk---------------------- 4198c609719bSwdenk 4199c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 42006aff3115Swdenklist, October 2002] 4201c609719bSwdenk 4202c609719bSwdenk 4203c609719bSwdenkint main(int argc, char *argv[]) 4204c609719bSwdenk{ 4205c609719bSwdenk sighandler_t no_more_time; 4206c609719bSwdenk 4207c609719bSwdenk signal(SIGALRM, no_more_time); 4208c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4209c609719bSwdenk 4210c609719bSwdenk if (available_money > available_manpower) { 42116c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4212c609719bSwdenk return 0; 4213c609719bSwdenk } 4214c609719bSwdenk 4215c609719bSwdenk Download latest U-Boot source; 4216c609719bSwdenk 42170668236bSWolfgang Denk Subscribe to u-boot mailing list; 42186aff3115Swdenk 42196c3fef28SJerry Van Baren if (clueless) 4220c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4221c609719bSwdenk 4222c609719bSwdenk while (learning) { 4223c609719bSwdenk Read the README file in the top level directory; 42247cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 42256c3fef28SJerry Van Baren Read applicable doc/*.README; 4226c609719bSwdenk Read the source, Luke; 42276c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4228c609719bSwdenk } 4229c609719bSwdenk 42306c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 42316c3fef28SJerry Van Baren Buy a BDI3000; 42326c3fef28SJerry Van Baren else 4233c609719bSwdenk Add a lot of aggravation and time; 4234c609719bSwdenk 42356c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 42366c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 42376c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 42386c3fef28SJerry Van Baren } else { 4239c609719bSwdenk Create your own board support subdirectory; 42406c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 42416c3fef28SJerry Van Baren } 42426c3fef28SJerry Van Baren Edit new board/<myboard> files 42436c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4244c609719bSwdenk 42456c3fef28SJerry Van Baren while (!accepted) { 4246c609719bSwdenk while (!running) { 4247c609719bSwdenk do { 4248c609719bSwdenk Add / modify source code; 4249c609719bSwdenk } until (compiles); 4250c609719bSwdenk Debug; 4251c609719bSwdenk if (clueless) 4252c609719bSwdenk email("Hi, I am having problems..."); 4253c609719bSwdenk } 42546c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 42556c3fef28SJerry Van Baren if (reasonable critiques) 42566c3fef28SJerry Van Baren Incorporate improvements from email list code review; 42576c3fef28SJerry Van Baren else 42586c3fef28SJerry Van Baren Defend code as written; 42596c3fef28SJerry Van Baren } 4260c609719bSwdenk 4261c609719bSwdenk return 0; 4262c609719bSwdenk} 4263c609719bSwdenk 4264c609719bSwdenkvoid no_more_time (int sig) 4265c609719bSwdenk{ 4266c609719bSwdenk hire_a_guru(); 4267c609719bSwdenk} 4268c609719bSwdenk 4269c609719bSwdenk 4270c609719bSwdenkCoding Standards: 4271c609719bSwdenk----------------- 4272c609719bSwdenk 4273c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 42742c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 42752c051651SDetlev Zundel"scripts/Lindent" in your Linux kernel source directory. In sources 42762c051651SDetlev Zundeloriginating from U-Boot a style corresponding to "Lindent -pcs" (adding 42772c051651SDetlev Zundelspaces before parameters to function calls) is actually used. 4278c609719bSwdenk 42792c051651SDetlev ZundelSource files originating from a different project (for example the 42802c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 42812c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 42822c051651SDetlev Zundelsources. 42832c051651SDetlev Zundel 42842c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 42852c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 42862c051651SDetlev Zundelin your code. 4287c609719bSwdenk 4288c178d3daSwdenkPlease also stick to the following formatting rules: 4289180d3f74Swdenk- remove any trailing white space 4290180d3f74Swdenk- use TAB characters for indentation, not spaces 4291180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 4292180d3f74Swdenk- do not add more than 2 empty lines to source files 4293180d3f74Swdenk- do not add trailing empty lines to source files 4294180d3f74Swdenk 4295c609719bSwdenkSubmissions which do not conform to the standards may be returned 4296c609719bSwdenkwith a request to reformat the changes. 4297c609719bSwdenk 4298c609719bSwdenk 4299c609719bSwdenkSubmitting Patches: 4300c609719bSwdenk------------------- 4301c609719bSwdenk 4302c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4303c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4304c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4305c609719bSwdenk 43060d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4307218ca724SWolfgang Denk 43080668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 43090668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 43100668236bSWolfgang Denk 4311c609719bSwdenkWhen you send a patch, please include the following information with 4312c609719bSwdenkit: 4313c609719bSwdenk 4314c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4315c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4316c609719bSwdenk patch actually fixes something. 4317c609719bSwdenk 4318c609719bSwdenk* For new features: a description of the feature and your 4319c609719bSwdenk implementation. 4320c609719bSwdenk 4321c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4322c609719bSwdenk 4323c609719bSwdenk* For major contributions, your entry to the CREDITS file 4324c609719bSwdenk 4325c609719bSwdenk* When you add support for a new board, don't forget to add this 4326c609719bSwdenk board to the MAKEALL script, too. 4327c609719bSwdenk 4328c609719bSwdenk* If your patch adds new configuration options, don't forget to 4329c609719bSwdenk document these in the README file. 4330c609719bSwdenk 4331218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4332218ca724SWolfgang Denk recommended) you can easily generate the patch using the 4333218ca724SWolfgang Denk "git-format-patch". If you then use "git-send-email" to send it to 4334218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4335218ca724SWolfgang Denk with some other mail clients. 4336c609719bSwdenk 4337218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4338218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4339218ca724SWolfgang Denk GNU diff. 43406dff5529Swdenk 4341218ca724SWolfgang Denk The current directory when running this command shall be the parent 4342218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4343218ca724SWolfgang Denk your patch includes sufficient directory information for the 4344218ca724SWolfgang Denk affected files). 4345218ca724SWolfgang Denk 4346218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4347218ca724SWolfgang Denk and compressed attachments must not be used. 4348c609719bSwdenk 434952f52c14Swdenk* If one logical set of modifications affects or creates several 435052f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 435152f52c14Swdenk 435252f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 435352f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 435452f52c14Swdenk 435552f52c14Swdenk 4356c609719bSwdenkNotes: 4357c609719bSwdenk 4358c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4359c609719bSwdenk source tree and make sure that no errors or warnings are reported 4360c609719bSwdenk for any of the boards. 4361c609719bSwdenk 4362c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4363c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4364c609719bSwdenk returned with a request to re-formatting / split it. 4365c609719bSwdenk 4366c609719bSwdenk* If you modify existing code, make sure that your new code does not 4367c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4368c609719bSwdenk When adding new features, these should compile conditionally only 4369c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4370c609719bSwdenk disabled must not need more memory than the old code without your 4371c609719bSwdenk modification. 437290dc6704Swdenk 43730668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 43740668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 43750668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 43760668236bSWolfgang Denk bigger than the size limit should be avoided. 4377