1c609719bSwdenk# 2b75190deSWolfgang Denk# (C) Copyright 2000 - 2012 3c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4c609719bSwdenk# 5c609719bSwdenk# See file CREDITS for list of people who contributed to this 6c609719bSwdenk# project. 7c609719bSwdenk# 8c609719bSwdenk# This program is free software; you can redistribute it and/or 9c609719bSwdenk# modify it under the terms of the GNU General Public License as 10c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11c609719bSwdenk# the License, or (at your option) any later version. 12c609719bSwdenk# 13c609719bSwdenk# This program is distributed in the hope that it will be useful, 14c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16c609719bSwdenk# GNU General Public License for more details. 17c609719bSwdenk# 18c609719bSwdenk# You should have received a copy of the GNU General Public License 19c609719bSwdenk# along with this program; if not, write to the Free Software 20c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21c609719bSwdenk# MA 02111-1307 USA 22c609719bSwdenk# 23c609719bSwdenk 24c609719bSwdenkSummary: 25c609719bSwdenk======== 26c609719bSwdenk 2724ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30e86e5a07Swdenkinitialize and test the hardware or to download and run application 31e86e5a07Swdenkcode. 32c609719bSwdenk 33c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 3424ee89b9Swdenkthe source code originate in the Linux source tree, we have some 3524ee89b9Swdenkheader files in common, and special provision has been made to 36c609719bSwdenksupport booting of Linux images. 37c609719bSwdenk 38c609719bSwdenkSome attention has been paid to make this software easily 39c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43c609719bSwdenkload and run it dynamically. 44c609719bSwdenk 45c609719bSwdenk 46c609719bSwdenkStatus: 47c609719bSwdenk======= 48c609719bSwdenk 49c609719bSwdenkIn general, all boards for which a configuration option exists in the 50c609719bSwdenkMakefile have been tested to some extent and can be considered 51c609719bSwdenk"working". In fact, many of them are used in production systems. 52c609719bSwdenk 53c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55218ca724SWolfgang Denkmaintainers. 56c609719bSwdenk 57c609719bSwdenk 58c609719bSwdenkWhere to get help: 59c609719bSwdenk================== 60c609719bSwdenk 61c609719bSwdenkIn case you have questions about, problems with or contributions for 62c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 630c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 640c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 650c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 660c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 67c609719bSwdenk 68c609719bSwdenk 69218ca724SWolfgang DenkWhere to get source code: 70218ca724SWolfgang Denk========================= 71218ca724SWolfgang Denk 72218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75218ca724SWolfgang Denk 76218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 7711ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 78218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79218ca724SWolfgang Denkdirectory. 80218ca724SWolfgang Denk 81d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83218ca724SWolfgang Denk 84218ca724SWolfgang Denk 85c609719bSwdenkWhere we come from: 86c609719bSwdenk=================== 87c609719bSwdenk 88c609719bSwdenk- start from 8xxrom sources 8924ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90c609719bSwdenk- clean up code 91c609719bSwdenk- make it easier to add custom boards 92c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93c609719bSwdenk- extend functions, especially: 94c609719bSwdenk * Provide extended interface to Linux boot loader 95c609719bSwdenk * S-Record download 96c609719bSwdenk * network boot 9711ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 9824ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99c609719bSwdenk- add other CPU families (starting with ARM) 10024ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 1010d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 10224ee89b9Swdenk 10324ee89b9Swdenk 10424ee89b9SwdenkNames and Spelling: 10524ee89b9Swdenk=================== 10624ee89b9Swdenk 10724ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 10824ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 10924ee89b9Swdenkin source files etc.). Example: 11024ee89b9Swdenk 11124ee89b9Swdenk This is the README file for the U-Boot project. 11224ee89b9Swdenk 11324ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 11424ee89b9Swdenk 11524ee89b9Swdenk include/asm-ppc/u-boot.h 11624ee89b9Swdenk 11724ee89b9Swdenk #include <asm/u-boot.h> 11824ee89b9Swdenk 11924ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 12024ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 12124ee89b9Swdenk 12224ee89b9Swdenk U_BOOT_VERSION u_boot_logo 12324ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124c609719bSwdenk 125c609719bSwdenk 12693f19cc0SwdenkVersioning: 12793f19cc0Swdenk=========== 12893f19cc0Swdenk 129360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 130360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 131360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 132360d883aSThomas Webernames consisting of the calendar year and month of the release date. 133360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 134360d883aSThomas Weberreleases in "stable" maintenance trees. 13593f19cc0Swdenk 136360d883aSThomas WeberExamples: 137360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 138360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 139360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 14093f19cc0Swdenk 14193f19cc0Swdenk 142c609719bSwdenkDirectory Hierarchy: 143c609719bSwdenk==================== 144c609719bSwdenk 1458d321b81SPeter Tyser/arch Architecture specific files 1468d321b81SPeter Tyser /arm Files generic to ARM architecture 1478d321b81SPeter Tyser /cpu CPU specific files 1488d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1498d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1506eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1518d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1528d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1538d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 1548d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1558d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1568d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 1578d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1588d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 1598d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1608d321b81SPeter Tyser /lib Architecture specific library files 1618d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1628d321b81SPeter Tyser /cpu CPU specific files 1638d321b81SPeter Tyser /lib Architecture specific library files 1648d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1658d321b81SPeter Tyser /cpu CPU specific files 1668d321b81SPeter Tyser /lib Architecture specific library files 167fea25720SGraeme Russ /x86 Files generic to x86 architecture 1688d321b81SPeter Tyser /cpu CPU specific files 1698d321b81SPeter Tyser /lib Architecture specific library files 1708d321b81SPeter Tyser /m68k Files generic to m68k architecture 1718d321b81SPeter Tyser /cpu CPU specific files 1728d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1738d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1748d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1758d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1768d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1778d321b81SPeter Tyser /lib Architecture specific library files 1788d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1798d321b81SPeter Tyser /cpu CPU specific files 1808d321b81SPeter Tyser /lib Architecture specific library files 1818d321b81SPeter Tyser /mips Files generic to MIPS architecture 1828d321b81SPeter Tyser /cpu CPU specific files 18392bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 18480421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 1858d321b81SPeter Tyser /lib Architecture specific library files 186afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 187afc1ce82SMacpaul Lin /cpu CPU specific files 188afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 189afc1ce82SMacpaul Lin /lib Architecture specific library files 1908d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1918d321b81SPeter Tyser /cpu CPU specific files 1928d321b81SPeter Tyser /lib Architecture specific library files 193a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1948d321b81SPeter Tyser /cpu CPU specific files 1958d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 1968d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 1978d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 1988d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 1998d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 2008d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 2018d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 2028d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 2038d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 2048d321b81SPeter Tyser /lib Architecture specific library files 2058d321b81SPeter Tyser /sh Files generic to SH architecture 2068d321b81SPeter Tyser /cpu CPU specific files 2078d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 2088d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 2098d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 2108d321b81SPeter Tyser /lib Architecture specific library files 2118d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2128d321b81SPeter Tyser /cpu CPU specific files 2138d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2148d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2158d321b81SPeter Tyser /lib Architecture specific library files 2168d321b81SPeter Tyser/api Machine/arch independent API for external apps 2178d321b81SPeter Tyser/board Board dependent files 2188d321b81SPeter Tyser/common Misc architecture independent functions 2198d321b81SPeter Tyser/disk Code for disk drive partition handling 2208d321b81SPeter Tyser/doc Documentation (don't expect too much) 2218d321b81SPeter Tyser/drivers Commonly used device drivers 2228d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2238d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2248d321b81SPeter Tyser/include Header Files 2258d321b81SPeter Tyser/lib Files generic to all architectures 2268d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2278d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2288d321b81SPeter Tyser /lzo Library files to support LZO decompression 2298d321b81SPeter Tyser/net Networking code 2308d321b81SPeter Tyser/post Power On Self Test 2318d321b81SPeter Tyser/rtc Real Time Clock drivers 2328d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 233c609719bSwdenk 234c609719bSwdenkSoftware Configuration: 235c609719bSwdenk======================= 236c609719bSwdenk 237c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 238c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 239c609719bSwdenk 240c609719bSwdenkThere are two classes of configuration variables: 241c609719bSwdenk 242c609719bSwdenk* Configuration _OPTIONS_: 243c609719bSwdenk These are selectable by the user and have names beginning with 244c609719bSwdenk "CONFIG_". 245c609719bSwdenk 246c609719bSwdenk* Configuration _SETTINGS_: 247c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 248c609719bSwdenk you don't know what you're doing; they have names beginning with 2496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 250c609719bSwdenk 251c609719bSwdenkLater we will add a configuration tool - probably similar to or even 252c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 253c609719bSwdenkdo the configuration by hand, which means creating some symbolic 254c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 255c609719bSwdenkas an example here. 256c609719bSwdenk 257c609719bSwdenk 258c609719bSwdenkSelection of Processor Architecture and Board Type: 259c609719bSwdenk--------------------------------------------------- 260c609719bSwdenk 261c609719bSwdenkFor all supported boards there are ready-to-use default 262c609719bSwdenkconfigurations available; just type "make <board_name>_config". 263c609719bSwdenk 264c609719bSwdenkExample: For a TQM823L module type: 265c609719bSwdenk 266c609719bSwdenk cd u-boot 267c609719bSwdenk make TQM823L_config 268c609719bSwdenk 26911ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 270c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 271c609719bSwdenkdirectory according to the instructions in cogent/README. 272c609719bSwdenk 273c609719bSwdenk 274c609719bSwdenkConfiguration Options: 275c609719bSwdenk---------------------- 276c609719bSwdenk 277c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 278c609719bSwdenksuch information is kept in a configuration file 279c609719bSwdenk"include/configs/<board_name>.h". 280c609719bSwdenk 281c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 282c609719bSwdenk"include/configs/TQM823L.h". 283c609719bSwdenk 284c609719bSwdenk 2857f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2867f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2877f6c2cbcSwdenkbuild a config tool - later. 2887f6c2cbcSwdenk 2897f6c2cbcSwdenk 290c609719bSwdenkThe following options need to be configured: 291c609719bSwdenk 2922628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 293c609719bSwdenk 2942628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2956ccec449SWolfgang Denk 2966ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 29709ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 298c609719bSwdenk 299c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 300c609719bSwdenk Define exactly one of 301c609719bSwdenk CONFIG_CMA286_60_OLD 302c609719bSwdenk--- FIXME --- not tested yet: 303c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 304c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 305c609719bSwdenk 306c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 307c609719bSwdenk Define exactly one of 308c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 309c609719bSwdenk 310c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 311c609719bSwdenk Define one or more of 312c609719bSwdenk CONFIG_CMA302 313c609719bSwdenk 314c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 315c609719bSwdenk Define one or more of 316c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 31711ccc33fSMarcel Ziswiler the LCD display every second with 318c609719bSwdenk a "rotator" |\-/|\-/ 319c609719bSwdenk 3202535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3212535d602Swdenk CONFIG_ADSTYPE 3222535d602Swdenk Possible values are: 3236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3272535d602Swdenk 328cf946c6dSLei Wen- Marvell Family Member 329cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 330cf946c6dSLei Wen multiple fs option at one time 331cf946c6dSLei Wen for marvell soc family 332cf946c6dSLei Wen 333c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 334c609719bSwdenk Define exactly one of 335c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 336c609719bSwdenk 33711ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 33866ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 33966ca92a5Swdenk get_gclk_freq() cannot work 3405da627a4Swdenk e.g. if there is no 32KHz 3415da627a4Swdenk reference PIT/RTC clock 34266ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 34366ca92a5Swdenk or XTAL/EXTAL) 344c609719bSwdenk 34566ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 34866ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 34975d1ea7fSwdenk See doc/README.MPC866 35075d1ea7fSwdenk 3516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 35275d1ea7fSwdenk 35375d1ea7fSwdenk Define this to measure the actual CPU clock instead 35475d1ea7fSwdenk of relying on the correctness of the configured 35575d1ea7fSwdenk values. Mostly useful for board bringup to make sure 35675d1ea7fSwdenk the PLL is locked at the intended frequency. Note 35775d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 35975d1ea7fSwdenk 360506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 361506f3918SHeiko Schocher 362506f3918SHeiko Schocher Define this option if you want to enable the 363506f3918SHeiko Schocher ICache only when Code runs from RAM. 364506f3918SHeiko Schocher 36566412c63SKumar Gala- 85xx CPU Options: 36666412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 36766412c63SKumar Gala 36866412c63SKumar Gala Defines the core time base clock divider ratio compared to the 36966412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 37066412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 37166412c63SKumar Gala 3728f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3738f29084aSKumar Gala 3748f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3758f29084aSKumar Gala tree nodes for the given platform. 3768f29084aSKumar Gala 3770b953ffcSMarkus Klotzbuecher- Intel Monahans options: 3786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 3790b953ffcSMarkus Klotzbuecher 3800b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 3810b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 3820b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 3830b953ffcSMarkus Klotzbuecher 3846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 3850b953ffcSMarkus Klotzbuecher 3860b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 3870b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 3880b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 3890b953ffcSMarkus Klotzbuecher by this value. 3900b953ffcSMarkus Klotzbuecher 39192bbd64eSDaniel Schwierzeck- MIPS CPU options: 39292bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 39392bbd64eSDaniel Schwierzeck 39492bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 39592bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 39692bbd64eSDaniel Schwierzeck relocation. 39792bbd64eSDaniel Schwierzeck 39892bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 39992bbd64eSDaniel Schwierzeck 40092bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 40192bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 40292bbd64eSDaniel Schwierzeck Possible values are: 40392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 40492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 40592bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 40692bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 40792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 40892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 40992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 41092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 41192bbd64eSDaniel Schwierzeck 41292bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 41392bbd64eSDaniel Schwierzeck 41492bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 41592bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 41692bbd64eSDaniel Schwierzeck 41792bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 41892bbd64eSDaniel Schwierzeck 41992bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 42092bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 42192bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 42292bbd64eSDaniel Schwierzeck 423b67d8816SChristian Riesch- ARM options: 424b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 425b67d8816SChristian Riesch 426b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 427b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 428b67d8816SChristian Riesch 4295da627a4Swdenk- Linux Kernel Interface: 430c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 431c609719bSwdenk 432c609719bSwdenk U-Boot stores all clock information in Hz 433c609719bSwdenk internally. For binary compatibility with older Linux 434c609719bSwdenk kernels (which expect the clocks passed in the 435c609719bSwdenk bd_info data to be in MHz) the environment variable 436c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 437c609719bSwdenk converts clock data to MHZ before passing it to the 438c609719bSwdenk Linux kernel. 439c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 440c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 441c609719bSwdenk default environment. 442c609719bSwdenk 4435da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 4445da627a4Swdenk 44511ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 4465da627a4Swdenk expect it to be in bytes, others in MB. 4475da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 4485da627a4Swdenk 449fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 450f57f70aaSWolfgang Denk 451f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 452213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 453213bf8c8SGerald Van Baren concepts). 454213bf8c8SGerald Van Baren 455213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 456213bf8c8SGerald Van Baren * New libfdt-based support 457213bf8c8SGerald Van Baren * Adds the "fdt" command 4583bb342fcSKim Phillips * The bootm command automatically updates the fdt 459213bf8c8SGerald Van Baren 460b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 461b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 462b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 463b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 464f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 465c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 466f57f70aaSWolfgang Denk 46711ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 46811ccc33fSMarcel Ziswiler addresses 4693bb342fcSKim Phillips 4704e253137SKumar Gala CONFIG_OF_BOARD_SETUP 4714e253137SKumar Gala 4724e253137SKumar Gala Board code has addition modification that it wants to make 4734e253137SKumar Gala to the flat device tree before handing it off to the kernel 4746705d81eSwdenk 4750267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 4760267768eSMatthew McClintock 47711ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 4780267768eSMatthew McClintock param header, the default value is zero if undefined. 4790267768eSMatthew McClintock 4803887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 4813887c3fbSHeiko Schocher 4823887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 4833887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 4843887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 4853887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 4863887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 4873887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 4883887c3fbSHeiko Schocher 4897eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 4907eb29398SIgor Grinberg 4917eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 4927eb29398SIgor Grinberg machine type and must be used to specify the machine type 4937eb29398SIgor Grinberg number as it appears in the ARM machine registry 4947eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 4957eb29398SIgor Grinberg Only boards that have multiple machine types supported 4967eb29398SIgor Grinberg in a single configuration file and the machine type is 4977eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 4987eb29398SIgor Grinberg 4990b2f4ecaSNiklaus Giger- vxWorks boot parameters: 5000b2f4ecaSNiklaus Giger 5010b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 5020b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 5030b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 5040b2f4ecaSNiklaus Giger 5050b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5060b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5070b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5080b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5090b2f4ecaSNiklaus Giger 5100b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5110b2f4ecaSNiklaus Giger 5120b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5130b2f4ecaSNiklaus Giger 5140b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5150b2f4ecaSNiklaus Giger the defaults discussed just above. 5160b2f4ecaSNiklaus Giger 5172c451f78SAneesh V- Cache Configuration: 5182c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 5192c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 5202c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 5212c451f78SAneesh V 52293bc2193SAneesh V- Cache Configuration for ARM: 52393bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 52493bc2193SAneesh V controller 52593bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 52693bc2193SAneesh V controller register space 52793bc2193SAneesh V 5286705d81eSwdenk- Serial Ports: 52948d0192fSAndreas Engel CONFIG_PL010_SERIAL 5306705d81eSwdenk 5316705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 5326705d81eSwdenk 53348d0192fSAndreas Engel CONFIG_PL011_SERIAL 5346705d81eSwdenk 5356705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 5366705d81eSwdenk 5376705d81eSwdenk CONFIG_PL011_CLOCK 5386705d81eSwdenk 5396705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 5406705d81eSwdenk the clock speed of the UARTs. 5416705d81eSwdenk 5426705d81eSwdenk CONFIG_PL01x_PORTS 5436705d81eSwdenk 5446705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 5456705d81eSwdenk define this to a list of base addresses for each (supported) 5466705d81eSwdenk port. See e.g. include/configs/versatile.h 5476705d81eSwdenk 548910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 549910f1ae3SJohn Rigby 550910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 551910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 552910f1ae3SJohn Rigby this variable to initialize the extra register. 553910f1ae3SJohn Rigby 554910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 555910f1ae3SJohn Rigby 556910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 557910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 558910f1ae3SJohn Rigby variable to flush the UART at init time. 559910f1ae3SJohn Rigby 5606705d81eSwdenk 561c609719bSwdenk- Console Interface: 562c609719bSwdenk Depending on board, define exactly one serial port 563c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 564c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 565c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 566c609719bSwdenk 567c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 568c609719bSwdenk port routines must be defined elsewhere 569c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 570c609719bSwdenk 571c609719bSwdenk CONFIG_CFB_CONSOLE 572c609719bSwdenk Enables console device for a color framebuffer. Needs following 573c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 574c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 575c609719bSwdenk (default big endian) 576c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 577c609719bSwdenk rectangle fill 578c609719bSwdenk (cf. smiLynxEM) 579c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 580c609719bSwdenk bit-blit (cf. smiLynxEM) 581c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 582c609719bSwdenk (cols=pitch) 583c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 584c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 585c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 586c609719bSwdenk (0-5, cf. cfb_console.c) 587c609719bSwdenk VIDEO_FB_ADRS framebuffer address 588c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 589c609719bSwdenk (i.e. i8042_kbd_init()) 590c609719bSwdenk VIDEO_TSTC_FCT test char fct 591c609719bSwdenk (i.e. i8042_tstc) 592c609719bSwdenk VIDEO_GETC_FCT get char fct 593c609719bSwdenk (i.e. i8042_getc) 594c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 595c609719bSwdenk (requires blink timer 596c609719bSwdenk cf. i8042.c) 5976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 598c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 599c609719bSwdenk upper right corner 600602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 601c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 602c609719bSwdenk upper left corner 603a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 604a6c7ad2fSwdenk linux_logo.h for logo. 605a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 606c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 60711ccc33fSMarcel Ziswiler additional board info beside 608c609719bSwdenk the logo 609c609719bSwdenk 610c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 611c609719bSwdenk default i/o. Serial console can be forced with 612c609719bSwdenk environment 'console=serial'. 613c609719bSwdenk 614a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 615a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 616a3ad8e26Swdenk the "silent" environment variable. See 617a3ad8e26Swdenk doc/README.silent for more information. 618a3ad8e26Swdenk 619c609719bSwdenk- Console Baudrate: 620c609719bSwdenk CONFIG_BAUDRATE - in bps 621c609719bSwdenk Select one of the baudrates listed in 6226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 624c609719bSwdenk 625c92fac91SHeiko Schocher- Console Rx buffer length 626c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 627c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6282b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 629c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 630c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 631c92fac91SHeiko Schocher the SMC. 632c92fac91SHeiko Schocher 6339558b48aSGraeme Russ- Pre-Console Buffer: 6349558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 6359558b48aSGraeme Russ initialised etc) all console output is silently discarded. 6369558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 6379558b48aSGraeme Russ buffer any console messages prior to the console being 6389558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 6399558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 6409558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 6419558b48aSGraeme Russ bytes are output before the console is initialised, the 6429558b48aSGraeme Russ earlier bytes are discarded. 6439558b48aSGraeme Russ 6449558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 6459558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 6469558b48aSGraeme Russ 647295d3942SSimon Glass- Pre-console putc(): 648295d3942SSimon Glass Prior to the console being initialised, console output is 649295d3942SSimon Glass normally silently discarded. This can be annoying if a 650295d3942SSimon Glass panic() happens in this time. 651295d3942SSimon Glass 652295d3942SSimon Glass If the CONFIG_PRE_CONSOLE_PUTC option is defined, then 653295d3942SSimon Glass U-Boot will call board_pre_console_putc() for each output 654295d3942SSimon Glass character in this case, This function should try to output 655295d3942SSimon Glass the character if possible, perhaps on all available UARTs 656295d3942SSimon Glass (it will need to do this directly, since the console code 657295d3942SSimon Glass is not functional yet). Note that if the panic happens 658295d3942SSimon Glass early enough, then it is possible that board_init_f() 659295d3942SSimon Glass (or even arch_cpu_init() on ARM) has not been called yet. 660295d3942SSimon Glass You should init all clocks, GPIOs, etc. that are needed 661295d3942SSimon Glass to get the character out. Baud rates will need to default 662295d3942SSimon Glass to something sensible. 663295d3942SSimon Glass 664046a37bdSSonny Rao- Safe printf() functions 665046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 666046a37bdSSonny Rao the printf() functions. These are defined in 667046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 668046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 669046a37bdSSonny Rao If this option is not given then these functions will 670046a37bdSSonny Rao silently discard their buffer size argument - this means 671046a37bdSSonny Rao you are not getting any overflow checking in this case. 672046a37bdSSonny Rao 673c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 674c609719bSwdenk Delay before automatically booting the default image; 675c609719bSwdenk set to -1 to disable autoboot. 676c609719bSwdenk 677c609719bSwdenk See doc/README.autoboot for these options that 678c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 679c609719bSwdenk CONFIG_BOOT_RETRY_TIME 680c609719bSwdenk CONFIG_BOOT_RETRY_MIN 681c609719bSwdenk CONFIG_AUTOBOOT_KEYED 682c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 683c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 684c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 685c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 686c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 687c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 688c609719bSwdenk CONFIG_RESET_TO_RETRY 689c609719bSwdenk 690c609719bSwdenk- Autoboot Command: 691c609719bSwdenk CONFIG_BOOTCOMMAND 692c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 693c609719bSwdenk define a command string that is automatically executed 694c609719bSwdenk when no character is read on the console interface 695c609719bSwdenk within "Boot Delay" after reset. 696c609719bSwdenk 697c609719bSwdenk CONFIG_BOOTARGS 698c609719bSwdenk This can be used to pass arguments to the bootm 699c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 700c609719bSwdenk environment value "bootargs". 701c609719bSwdenk 702c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 703c609719bSwdenk The value of these goes into the environment as 704c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 705c609719bSwdenk as a convenience, when switching between booting from 70611ccc33fSMarcel Ziswiler RAM and NFS. 707c609719bSwdenk 708c609719bSwdenk- Pre-Boot Commands: 709c609719bSwdenk CONFIG_PREBOOT 710c609719bSwdenk 711c609719bSwdenk When this option is #defined, the existence of the 712c609719bSwdenk environment variable "preboot" will be checked 713c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 714c609719bSwdenk countdown and/or running the auto-boot command resp. 715c609719bSwdenk entering interactive mode. 716c609719bSwdenk 717c609719bSwdenk This feature is especially useful when "preboot" is 718c609719bSwdenk automatically generated or modified. For an example 719c609719bSwdenk see the LWMON board specific code: here "preboot" is 720c609719bSwdenk modified when the user holds down a certain 721c609719bSwdenk combination of keys on the (special) keyboard when 722c609719bSwdenk booting the systems 723c609719bSwdenk 724c609719bSwdenk- Serial Download Echo Mode: 725c609719bSwdenk CONFIG_LOADS_ECHO 726c609719bSwdenk If defined to 1, all characters received during a 727c609719bSwdenk serial download (using the "loads" command) are 728c609719bSwdenk echoed back. This might be needed by some terminal 729c609719bSwdenk emulations (like "cu"), but may as well just take 730c609719bSwdenk time on others. This setting #define's the initial 731c609719bSwdenk value of the "loads_echo" environment variable. 732c609719bSwdenk 733602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 734c609719bSwdenk CONFIG_KGDB_BAUDRATE 735c609719bSwdenk Select one of the baudrates listed in 7366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 737c609719bSwdenk 738c609719bSwdenk- Monitor Functions: 739602ad3b3SJon Loeliger Monitor commands can be included or excluded 740602ad3b3SJon Loeliger from the build by using the #include files 741602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 742602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 743602ad3b3SJon Loeliger and augmenting with additional #define's 744602ad3b3SJon Loeliger for wanted commands. 745c609719bSwdenk 746602ad3b3SJon Loeliger The default command configuration includes all commands 747602ad3b3SJon Loeliger except those marked below with a "*". 748602ad3b3SJon Loeliger 749602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 750602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 751602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 752602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 753602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 754602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 755602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 756602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 757710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 758602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 759602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 760602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 761a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 762a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 763a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 764a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 765602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 766602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 767246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 768602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 769602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 7700c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 771bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 772602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 773602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 774602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 775602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 776602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 777a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 778a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 779602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 780602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 781602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 782602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 783602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 784602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 7850c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 786602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 787602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 788602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 789602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 7901ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 791602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 792602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 79302c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 79402c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 795602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 79656523f12Swdenk loop, loopw, mtest 797602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 798602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 799602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 80068d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 801602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 802602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 803e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 804e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 805602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 806602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 807602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 808602ad3b3SJon Loeliger host 809602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 810602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 811602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 812602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 813602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 814602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 815602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 816602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 817602ad3b3SJon Loeliger (4xx only) 818f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 819c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 82002c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 82174de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 822602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 8237a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 8241fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 825ca366d0eSChe-liang Chiou CONFIG_CMD_TIME * run command and report execution time 826602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 827602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 828602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 829c609719bSwdenk 830c609719bSwdenk 831c609719bSwdenk EXAMPLE: If you want all functions except of network 832c609719bSwdenk support you can write: 833c609719bSwdenk 834602ad3b3SJon Loeliger #include "config_cmd_all.h" 835602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 836c609719bSwdenk 837213bf8c8SGerald Van Baren Other Commands: 838213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 839c609719bSwdenk 840c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 841602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 842c609719bSwdenk what you (and your U-Boot users) are doing. Data 843c609719bSwdenk cache cannot be enabled on systems like the 8xx or 844c609719bSwdenk 8260 (where accesses to the IMMR region must be 845c609719bSwdenk uncached), and it cannot be disabled on all other 846c609719bSwdenk systems where we (mis-) use the data cache to hold an 847c609719bSwdenk initial stack and some data. 848c609719bSwdenk 849c609719bSwdenk 850c609719bSwdenk XXX - this list needs to get updated! 851c609719bSwdenk 85245ba8077SSimon Glass- Device tree: 85345ba8077SSimon Glass CONFIG_OF_CONTROL 85445ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 85545ba8077SSimon Glass to configure its devices, instead of relying on statically 85645ba8077SSimon Glass compiled #defines in the board file. This option is 85745ba8077SSimon Glass experimental and only available on a few boards. The device 85845ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 85945ba8077SSimon Glass 8602c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 8612c0f79e4SSimon Glass be done using one of the two options below: 862bbb0b128SSimon Glass 863bbb0b128SSimon Glass CONFIG_OF_EMBED 864bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 865bbb0b128SSimon Glass binary in its image. This device tree file should be in the 866bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 867bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 868bbb0b128SSimon Glass the global data structure as gd->blob. 86945ba8077SSimon Glass 8702c0f79e4SSimon Glass CONFIG_OF_SEPARATE 8712c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 8722c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 8732c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 8742c0f79e4SSimon Glass 8752c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 8762c0f79e4SSimon Glass 8772c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 8782c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 8792c0f79e4SSimon Glass still use the individual files if you need something more 8802c0f79e4SSimon Glass exotic. 8812c0f79e4SSimon Glass 882c609719bSwdenk- Watchdog: 883c609719bSwdenk CONFIG_WATCHDOG 884c609719bSwdenk If this variable is defined, it enables watchdog 8856abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 8866abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 8876abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 8886abe6fb6SDetlev Zundel register. When supported for a specific SoC is 8896abe6fb6SDetlev Zundel available, then no further board specific code should 8906abe6fb6SDetlev Zundel be needed to use it. 8916abe6fb6SDetlev Zundel 8926abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 8936abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 8946abe6fb6SDetlev Zundel SoC, then define this variable and provide board 8956abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 896c609719bSwdenk 897c1551ea8Sstroese- U-Boot Version: 898c1551ea8Sstroese CONFIG_VERSION_VARIABLE 899c1551ea8Sstroese If this variable is defined, an environment variable 900c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 901c1551ea8Sstroese version as printed by the "version" command. 902c1551ea8Sstroese This variable is readonly. 903c1551ea8Sstroese 904c609719bSwdenk- Real-Time Clock: 905c609719bSwdenk 906602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 907c609719bSwdenk has to be selected, too. Define exactly one of the 908c609719bSwdenk following options: 909c609719bSwdenk 910c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 911c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 9124e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 913c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 9141cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 915c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 9167f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 9173bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 9189536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 9194c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 9206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 92171d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 92271d19f30SHeiko Schocher RV3029 RTC. 923c609719bSwdenk 924b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 925b37c7e5eSwdenk must also be configured. See I2C Support, below. 926b37c7e5eSwdenk 927e92739d3SPeter Tyser- GPIO Support: 928e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 929e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 930e92739d3SPeter Tyser 9315dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 9325dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 9335dec49caSChris Packham pins supported by a particular chip. 9345dec49caSChris Packham 935e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 936e92739d3SPeter Tyser must also be configured. See I2C Support, below. 937e92739d3SPeter Tyser 938c609719bSwdenk- Timestamp Support: 939c609719bSwdenk 940c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 941c609719bSwdenk (date and time) of an image is printed by image 942c609719bSwdenk commands like bootm or iminfo. This option is 943602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 944c609719bSwdenk 945c609719bSwdenk- Partition Support: 946c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 94707f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 948c609719bSwdenk 949602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 950218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 951218ca724SWolfgang Denk least one partition type as well. 952c609719bSwdenk 953c609719bSwdenk- IDE Reset method: 9544d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 9554d13cbadSwdenk board configurations files but used nowhere! 956c609719bSwdenk 9574d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 9584d13cbadSwdenk be performed by calling the function 9594d13cbadSwdenk ide_set_reset(int reset) 9604d13cbadSwdenk which has to be defined in a board specific file 961c609719bSwdenk 962c609719bSwdenk- ATAPI Support: 963c609719bSwdenk CONFIG_ATAPI 964c609719bSwdenk 965c609719bSwdenk Set this to enable ATAPI support. 966c609719bSwdenk 967c40b2956Swdenk- LBA48 Support 968c40b2956Swdenk CONFIG_LBA48 969c40b2956Swdenk 970c40b2956Swdenk Set this to enable support for disks larger than 137GB 9714b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 972c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 973c40b2956Swdenk support disks up to 2.1TB. 974c40b2956Swdenk 9756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 976c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 977c40b2956Swdenk Default is 32bit. 978c40b2956Swdenk 979c609719bSwdenk- SCSI Support: 980c609719bSwdenk At the moment only there is only support for the 981c609719bSwdenk SYM53C8XX SCSI controller; define 982c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 983c609719bSwdenk 9846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 9856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 9866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 987c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 988c609719bSwdenk devices. 9896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 990c609719bSwdenk 991c609719bSwdenk- NETWORK Support (PCI): 992682011ffSwdenk CONFIG_E1000 993ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 994ce5207e1SKyle Moffett 995ce5207e1SKyle Moffett CONFIG_E1000_SPI 996ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 997ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 998ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 999ce5207e1SKyle Moffett 1000ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1001ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1002ce5207e1SKyle Moffett example with the "sspi" command. 1003ce5207e1SKyle Moffett 1004ce5207e1SKyle Moffett CONFIG_CMD_E1000 1005ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1006ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1007682011ffSwdenk 1008ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 100911ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1010ac3315c2SAndre Schwarz 1011c609719bSwdenk CONFIG_EEPRO100 1012c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 101311ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1014c609719bSwdenk write routine for first time initialisation. 1015c609719bSwdenk 1016c609719bSwdenk CONFIG_TULIP 1017c609719bSwdenk Support for Digital 2114x chips. 1018c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1019c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1020c609719bSwdenk 1021c609719bSwdenk CONFIG_NATSEMI 1022c609719bSwdenk Support for National dp83815 chips. 1023c609719bSwdenk 1024c609719bSwdenk CONFIG_NS8382X 1025c609719bSwdenk Support for National dp8382[01] gigabit chips. 1026c609719bSwdenk 102745219c46Swdenk- NETWORK Support (other): 102845219c46Swdenk 1029c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1030c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1031c041e9d2SJens Scharsig 1032c041e9d2SJens Scharsig CONFIG_RMII 1033c041e9d2SJens Scharsig Define this to use reduced MII inteface 1034c041e9d2SJens Scharsig 1035c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1036c041e9d2SJens Scharsig If this defined, the driver is quiet. 1037c041e9d2SJens Scharsig The driver doen't show link status messages. 1038c041e9d2SJens Scharsig 1039efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1040efdd7319SRob Herring Support for the Calxeda XGMAC device 1041efdd7319SRob Herring 104245219c46Swdenk CONFIG_DRIVER_LAN91C96 104345219c46Swdenk Support for SMSC's LAN91C96 chips. 104445219c46Swdenk 104545219c46Swdenk CONFIG_LAN91C96_BASE 104645219c46Swdenk Define this to hold the physical address 104745219c46Swdenk of the LAN91C96's I/O space 104845219c46Swdenk 104945219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 105045219c46Swdenk Define this to enable 32 bit addressing 105145219c46Swdenk 1052f39748aeSwdenk CONFIG_DRIVER_SMC91111 1053f39748aeSwdenk Support for SMSC's LAN91C111 chip 1054f39748aeSwdenk 1055f39748aeSwdenk CONFIG_SMC91111_BASE 1056f39748aeSwdenk Define this to hold the physical address 1057f39748aeSwdenk of the device (I/O space) 1058f39748aeSwdenk 1059f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1060f39748aeSwdenk Define this if data bus is 32 bits 1061f39748aeSwdenk 1062f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1063f39748aeSwdenk Define this to use i/o functions instead of macros 1064f39748aeSwdenk (some hardware wont work with macros) 1065f39748aeSwdenk 1066dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1067dc02badaSHeiko Schocher Support for davinci emac 1068dc02badaSHeiko Schocher 1069dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1070dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1071dc02badaSHeiko Schocher 1072b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1073b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1074b3dbf4a5SMacpaul Lin 1075b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1076b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1077b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1078b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1079b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1080b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1081b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1082b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1083b3dbf4a5SMacpaul Lin 1084c2fff331SMike Rapoport CONFIG_SMC911X 1085557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1086557b377dSJens Gehrlein 1087c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1088557b377dSJens Gehrlein Define this to hold the physical address 1089557b377dSJens Gehrlein of the device (I/O space) 1090557b377dSJens Gehrlein 1091c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1092557b377dSJens Gehrlein Define this if data bus is 32 bits 1093557b377dSJens Gehrlein 1094c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1095557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1096557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1097c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1098557b377dSJens Gehrlein 10993d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 11003d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 11013d0075faSYoshihiro Shimoda 11023d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 11033d0075faSYoshihiro Shimoda Define the number of ports to be used 11043d0075faSYoshihiro Shimoda 11053d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 11063d0075faSYoshihiro Shimoda Define the ETH PHY's address 11073d0075faSYoshihiro Shimoda 110868260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 110968260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 111068260aabSYoshihiro Shimoda 11115e124724SVadim Bendebury- TPM Support: 11125e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 11135e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 11145e124724SVadim Bendebury per system is supported at this time. 11155e124724SVadim Bendebury 11165e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 11175e124724SVadim Bendebury Base address where the generic TPM device is mapped 11185e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 11195e124724SVadim Bendebury 0xfed40000. 11205e124724SVadim Bendebury 1121c609719bSwdenk- USB Support: 1122c609719bSwdenk At the moment only the UHCI host controller is 11234d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1124c609719bSwdenk CONFIG_USB_UHCI to enable it. 1125c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 112630d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1127c609719bSwdenk storage devices. 1128c609719bSwdenk Note: 1129c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1130c609719bSwdenk (TEAC FD-05PUB). 11314d13cbadSwdenk MPC5200 USB requires additional defines: 11324d13cbadSwdenk CONFIG_USB_CLOCK 11334d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1134307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1135307ecb6dSEric Millbrandt for USB on PSC3 11364d13cbadSwdenk CONFIG_USB_CONFIG 11374d13cbadSwdenk for differential drivers: 0x00001000 11384d13cbadSwdenk for single ended drivers: 0x00005000 1139307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1140307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 11416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1142fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1143fdcfaa1bSZhang Wei instead of using asynchronous interrupts 11444d13cbadSwdenk 114516c8d5e7SWolfgang Denk- USB Device: 114616c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 114716c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 114816c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 114911ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 115016c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 115116c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 115216c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 115316c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 115416c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 115516c8d5e7SWolfgang Denk a Linux host by 115616c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 115716c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 115816c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 115916c8d5e7SWolfgang Denk might be defined in YourBoardName.h 116016c8d5e7SWolfgang Denk 116116c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 116216c8d5e7SWolfgang Denk Define this to build a UDC device 116316c8d5e7SWolfgang Denk 116416c8d5e7SWolfgang Denk CONFIG_USB_TTY 116516c8d5e7SWolfgang Denk Define this to have a tty type of device available to 116616c8d5e7SWolfgang Denk talk to the UDC device 116716c8d5e7SWolfgang Denk 11686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 116916c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 117016c8d5e7SWolfgang Denk be set to usbtty. 117116c8d5e7SWolfgang Denk 117216c8d5e7SWolfgang Denk mpc8xx: 11736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 117416c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 11756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 117616c8d5e7SWolfgang Denk 11776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 117816c8d5e7SWolfgang Denk Derive USB clock from brgclk 11796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 118016c8d5e7SWolfgang Denk 118116c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 118216c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 118316c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 118416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 118516c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 118616c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 118716c8d5e7SWolfgang Denk 118816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 118916c8d5e7SWolfgang Denk Define this string as the name of your company for 119016c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 119116c8d5e7SWolfgang Denk 119216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 119316c8d5e7SWolfgang Denk Define this string as the name of your product 119416c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 119516c8d5e7SWolfgang Denk 119616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 119716c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 119816c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 119916c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 120016c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 120116c8d5e7SWolfgang Denk 120216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 120316c8d5e7SWolfgang Denk Define this as the unique Product ID 120416c8d5e7SWolfgang Denk for your device 120516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1206c609719bSwdenk 1207d70a560fSIgor Grinberg- ULPI Layer Support: 1208d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1209d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1210d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1211d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1212d70a560fSIgor Grinberg viewport is supported. 1213d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1214d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 1215c609719bSwdenk 1216c609719bSwdenk- MMC Support: 1217c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1218c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1219c609719bSwdenk accessed from the boot prompt by mapping the device 1220c609719bSwdenk to physical memory similar to flash. Command line is 1221602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1222602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1223c609719bSwdenk 1224afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1225afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1226afb35666SYoshihiro Shimoda 1227afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1228afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1229afb35666SYoshihiro Shimoda 1230afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1231afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1232afb35666SYoshihiro Shimoda 12336705d81eSwdenk- Journaling Flash filesystem support: 12346705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 12356705d81eSwdenk CONFIG_JFFS2_NAND_DEV 12366705d81eSwdenk Define these for a default partition on a NAND device 12376705d81eSwdenk 12386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 12396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 12406705d81eSwdenk Define these for a default partition on a NOR device 12416705d81eSwdenk 12426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 12436705d81eSwdenk Define this to create an own partition. You have to provide a 12446705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 12456705d81eSwdenk 12466705d81eSwdenk If you define only one JFFS2 partition you may also want to 12476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 12486705d81eSwdenk to disable the command chpart. This is the default when you 12496705d81eSwdenk have not defined a custom partition 12506705d81eSwdenk 1251c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1252c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1253c30a15e5SDonggeun Kim Support for saving memory data as a file 1254c30a15e5SDonggeun Kim in FAT formatted partition 1255c30a15e5SDonggeun Kim 1256c609719bSwdenk- Keyboard Support: 1257c609719bSwdenk CONFIG_ISA_KEYBOARD 1258c609719bSwdenk 1259c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1260c609719bSwdenk support 1261c609719bSwdenk 1262c609719bSwdenk CONFIG_I8042_KBD 1263c609719bSwdenk Standard PC keyboard driver with US (is default) and 1264c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1265c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1266c609719bSwdenk for cfb_console. Supports cursor blinking. 1267c609719bSwdenk 1268c609719bSwdenk- Video support: 1269c609719bSwdenk CONFIG_VIDEO 1270c609719bSwdenk 1271c609719bSwdenk Define this to enable video support (for output to 1272c609719bSwdenk video). 1273c609719bSwdenk 1274c609719bSwdenk CONFIG_VIDEO_CT69000 1275c609719bSwdenk 1276c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1277c609719bSwdenk 1278c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1279eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1280eeb1b77bSwdenk video output is selected via environment 'videoout' 1281eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1282eeb1b77bSwdenk assumed. 1283c609719bSwdenk 1284eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 128511ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1286eeb1b77bSwdenk are possible: 1287eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1288eeb1b77bSwdenk Following standard modes are supported (* is default): 1289eeb1b77bSwdenk 1290eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1291eeb1b77bSwdenk -------------+--------------------------------------------- 1292eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1293eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1294eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1295eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1296eeb1b77bSwdenk -------------+--------------------------------------------- 1297c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1298c609719bSwdenk 1299eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 13007817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1301eeb1b77bSwdenk 1302eeb1b77bSwdenk 1303a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1304a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1305a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1306a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1307a6c7ad2fSwdenk 13087d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 13097d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 13107d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 13117d3053fbSTimur Tabi support, and should also define these other macros: 13127d3053fbSTimur Tabi 13137d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 13147d3053fbSTimur Tabi CONFIG_VIDEO 13157d3053fbSTimur Tabi CONFIG_CMD_BMP 13167d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 13177d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 13187d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 13197d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 13207d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 13217d3053fbSTimur Tabi 1322ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1323ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1324ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1325ba8e76bdSTimur Tabi description of this variable. 13267d3053fbSTimur Tabi 1327682011ffSwdenk- Keyboard Support: 1328682011ffSwdenk CONFIG_KEYBOARD 1329682011ffSwdenk 1330682011ffSwdenk Define this to enable a custom keyboard support. 1331682011ffSwdenk This simply calls drv_keyboard_init() which must be 1332682011ffSwdenk defined in your board-specific files. 1333682011ffSwdenk The only board using this so far is RBC823. 1334a6c7ad2fSwdenk 1335c609719bSwdenk- LCD Support: CONFIG_LCD 1336c609719bSwdenk 1337c609719bSwdenk Define this to enable LCD support (for output to LCD 1338c609719bSwdenk display); also select one of the supported displays 1339c609719bSwdenk by defining one of these: 1340c609719bSwdenk 134139cf4804SStelian Pop CONFIG_ATMEL_LCD: 134239cf4804SStelian Pop 134339cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 134439cf4804SStelian Pop 1345fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1346c609719bSwdenk 1347fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1348c609719bSwdenk 1349fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1350c609719bSwdenk 1351fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1352fd3103bbSwdenk Active, color, single scan. 1353fd3103bbSwdenk 1354fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1355fd3103bbSwdenk 1356fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1357c609719bSwdenk Active, color, single scan. 1358c609719bSwdenk 1359c609719bSwdenk CONFIG_SHARP_16x9 1360c609719bSwdenk 1361c609719bSwdenk Sharp 320x240. Active, color, single scan. 1362c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1363c609719bSwdenk 1364c609719bSwdenk CONFIG_SHARP_LQ64D341 1365c609719bSwdenk 1366c609719bSwdenk Sharp LQ64D341 display, 640x480. 1367c609719bSwdenk Active, color, single scan. 1368c609719bSwdenk 1369c609719bSwdenk CONFIG_HLD1045 1370c609719bSwdenk 1371c609719bSwdenk HLD1045 display, 640x480. 1372c609719bSwdenk Active, color, single scan. 1373c609719bSwdenk 1374c609719bSwdenk CONFIG_OPTREX_BW 1375c609719bSwdenk 1376c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1377c609719bSwdenk or 1378c609719bSwdenk Hitachi LMG6912RPFC-00T 1379c609719bSwdenk or 1380c609719bSwdenk Hitachi SP14Q002 1381c609719bSwdenk 1382c609719bSwdenk 320x240. Black & white. 1383c609719bSwdenk 1384c609719bSwdenk Normally display is black on white background; define 13856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1386c609719bSwdenk 13877152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1388d791b1dcSwdenk 1389d791b1dcSwdenk If this option is set, the environment is checked for 1390d791b1dcSwdenk a variable "splashimage". If found, the usual display 1391d791b1dcSwdenk of logo, copyright and system information on the LCD 1392e94d2cd9Swdenk is suppressed and the BMP image at the address 1393d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1394d791b1dcSwdenk console is redirected to the "nulldev", too. This 1395d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1396d791b1dcSwdenk loaded very quickly after power-on. 1397d791b1dcSwdenk 13981ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 13991ca298ceSMatthias Weisser 14001ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 14011ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 14021ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 14031ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 14041ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 14051ca298ceSMatthias Weisser specify 'm' for centering the image. 14061ca298ceSMatthias Weisser 14071ca298ceSMatthias Weisser Example: 14081ca298ceSMatthias Weisser setenv splashpos m,m 14091ca298ceSMatthias Weisser => image at center of screen 14101ca298ceSMatthias Weisser 14111ca298ceSMatthias Weisser setenv splashpos 30,20 14121ca298ceSMatthias Weisser => image at x = 30 and y = 20 14131ca298ceSMatthias Weisser 14141ca298ceSMatthias Weisser setenv splashpos -10,m 14151ca298ceSMatthias Weisser => vertically centered image 14161ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 14171ca298ceSMatthias Weisser 141898f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 141998f4a3dfSStefan Roese 142098f4a3dfSStefan Roese If this option is set, additionally to standard BMP 142198f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 142298f4a3dfSStefan Roese splashscreen support or the bmp command. 142398f4a3dfSStefan Roese 1424d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1425d5011762SAnatolij Gustschin 1426d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1427d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1428d5011762SAnatolij Gustschin bmp command. 1429d5011762SAnatolij Gustschin 1430c29fdfc1Swdenk- Compression support: 1431c29fdfc1Swdenk CONFIG_BZIP2 1432c29fdfc1Swdenk 1433c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1434c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1435c29fdfc1Swdenk compressed images are supported. 1436c29fdfc1Swdenk 1437c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 14386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1439c29fdfc1Swdenk be at least 4MB. 1440d791b1dcSwdenk 1441fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1442fc9c1727SLuigi 'Comio' Mantellini 1443fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1444fc9c1727SLuigi 'Comio' Mantellini images is included. 1445fc9c1727SLuigi 'Comio' Mantellini 1446fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1447fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1448fc9c1727SLuigi 'Comio' Mantellini formula: 1449fc9c1727SLuigi 'Comio' Mantellini 1450fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1451fc9c1727SLuigi 'Comio' Mantellini 1452fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1453fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1454fc9c1727SLuigi 'Comio' Mantellini 1455fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1456fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1457fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1458fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1459fc9c1727SLuigi 'Comio' Mantellini 1460fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1461fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 14626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1463fc9c1727SLuigi 'Comio' Mantellini 146417ea1177Swdenk- MII/PHY support: 146517ea1177Swdenk CONFIG_PHY_ADDR 146617ea1177Swdenk 146717ea1177Swdenk The address of PHY on MII bus. 146817ea1177Swdenk 146917ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 147017ea1177Swdenk 147117ea1177Swdenk The clock frequency of the MII bus 147217ea1177Swdenk 147317ea1177Swdenk CONFIG_PHY_GIGE 147417ea1177Swdenk 147517ea1177Swdenk If this option is set, support for speed/duplex 147611ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 147717ea1177Swdenk 147817ea1177Swdenk CONFIG_PHY_RESET_DELAY 147917ea1177Swdenk 148017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 148117ea1177Swdenk reset before any MII register access is possible. 148217ea1177Swdenk For such PHY, set this option to the usec delay 148317ea1177Swdenk required. (minimum 300usec for LXT971A) 148417ea1177Swdenk 148517ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 148617ea1177Swdenk 148717ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 148817ea1177Swdenk command issued before MII status register can be read 148917ea1177Swdenk 1490c609719bSwdenk- Ethernet address: 1491c609719bSwdenk CONFIG_ETHADDR 1492c68a05feSrichardretanubun CONFIG_ETH1ADDR 1493c609719bSwdenk CONFIG_ETH2ADDR 1494c609719bSwdenk CONFIG_ETH3ADDR 1495c68a05feSrichardretanubun CONFIG_ETH4ADDR 1496c68a05feSrichardretanubun CONFIG_ETH5ADDR 1497c609719bSwdenk 149811ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 149911ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1500c609719bSwdenk is not determined automatically. 1501c609719bSwdenk 1502c609719bSwdenk- IP address: 1503c609719bSwdenk CONFIG_IPADDR 1504c609719bSwdenk 1505c609719bSwdenk Define a default value for the IP address to use for 150611ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1507c609719bSwdenk determined through e.g. bootp. 15081ebcd654SWolfgang Denk (Environment variable "ipaddr") 1509c609719bSwdenk 1510c609719bSwdenk- Server IP address: 1511c609719bSwdenk CONFIG_SERVERIP 1512c609719bSwdenk 1513c609719bSwdenk Defines a default value for the IP address of a TFTP 1514c609719bSwdenk server to contact when using the "tftboot" command. 15151ebcd654SWolfgang Denk (Environment variable "serverip") 1516c609719bSwdenk 151797cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 151897cfe861SRobin Getz 151997cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 152097cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 152197cfe861SRobin Getz 15221ebcd654SWolfgang Denk- Gateway IP address: 15231ebcd654SWolfgang Denk CONFIG_GATEWAYIP 15241ebcd654SWolfgang Denk 15251ebcd654SWolfgang Denk Defines a default value for the IP address of the 15261ebcd654SWolfgang Denk default router where packets to other networks are 15271ebcd654SWolfgang Denk sent to. 15281ebcd654SWolfgang Denk (Environment variable "gatewayip") 15291ebcd654SWolfgang Denk 15301ebcd654SWolfgang Denk- Subnet mask: 15311ebcd654SWolfgang Denk CONFIG_NETMASK 15321ebcd654SWolfgang Denk 15331ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 15341ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 15351ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 15361ebcd654SWolfgang Denk forwarded through a router. 15371ebcd654SWolfgang Denk (Environment variable "netmask") 15381ebcd654SWolfgang Denk 153953a5c424SDavid Updegraff- Multicast TFTP Mode: 154053a5c424SDavid Updegraff CONFIG_MCAST_TFTP 154153a5c424SDavid Updegraff 154253a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 154353a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 154411ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 154553a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 154653a5c424SDavid Updegraff multicast group. 154753a5c424SDavid Updegraff 1548c609719bSwdenk- BOOTP Recovery Mode: 1549c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1550c609719bSwdenk 1551c609719bSwdenk If you have many targets in a network that try to 1552c609719bSwdenk boot using BOOTP, you may want to avoid that all 1553c609719bSwdenk systems send out BOOTP requests at precisely the same 1554c609719bSwdenk moment (which would happen for instance at recovery 1555c609719bSwdenk from a power failure, when all systems will try to 1556c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1557c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1558c609719bSwdenk inserted before sending out BOOTP requests. The 15596c33c785SWolfgang Denk following delays are inserted then: 1560c609719bSwdenk 1561c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1562c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1563c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1564c609719bSwdenk 4th and following 1565c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1566c609719bSwdenk 1567fe389a82Sstroese- DHCP Advanced Options: 15681fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 15691fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1570fe389a82Sstroese 15711fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 15721fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 15731fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 15741fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 15751fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 15761fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 15771fe80d79SJon Loeliger CONFIG_BOOTP_DNS 15781fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 15791fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 15801fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 15811fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 15821fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1583fe389a82Sstroese 15845d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 15855d110f0aSWilson Callan environment variable, not the BOOTP server. 1586fe389a82Sstroese 1587fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1588fe389a82Sstroese serverip from a DHCP server, it is possible that more 1589fe389a82Sstroese than one DNS serverip is offered to the client. 1590fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1591fe389a82Sstroese serverip will be stored in the additional environment 1592fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1593fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 15941fe80d79SJon Loeliger is defined. 1595fe389a82Sstroese 1596fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1597fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1598fe389a82Sstroese need the hostname of the DHCP requester. 15995d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 16001fe80d79SJon Loeliger of the "hostname" environment variable is passed as 16011fe80d79SJon Loeliger option 12 to the DHCP server. 1602fe389a82Sstroese 1603d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1604d9a2f416SAras Vaichas 1605d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1606d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1607d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1608d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1609d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1610d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1611d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1612d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1613d9a2f416SAras Vaichas that one of the retries will be successful but note that 1614d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1615d9a2f416SAras Vaichas this delay. 1616d9a2f416SAras Vaichas 1617a3d991bdSwdenk - CDP Options: 1618a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1619a3d991bdSwdenk 1620a3d991bdSwdenk The device id used in CDP trigger frames. 1621a3d991bdSwdenk 1622a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1623a3d991bdSwdenk 1624a3d991bdSwdenk A two character string which is prefixed to the MAC address 1625a3d991bdSwdenk of the device. 1626a3d991bdSwdenk 1627a3d991bdSwdenk CONFIG_CDP_PORT_ID 1628a3d991bdSwdenk 1629a3d991bdSwdenk A printf format string which contains the ascii name of 1630a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 163111ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1632a3d991bdSwdenk 1633a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1634a3d991bdSwdenk 1635a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1636a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1637a3d991bdSwdenk 1638a3d991bdSwdenk CONFIG_CDP_VERSION 1639a3d991bdSwdenk 1640a3d991bdSwdenk An ascii string containing the version of the software. 1641a3d991bdSwdenk 1642a3d991bdSwdenk CONFIG_CDP_PLATFORM 1643a3d991bdSwdenk 1644a3d991bdSwdenk An ascii string containing the name of the platform. 1645a3d991bdSwdenk 1646a3d991bdSwdenk CONFIG_CDP_TRIGGER 1647a3d991bdSwdenk 1648a3d991bdSwdenk A 32bit integer sent on the trigger. 1649a3d991bdSwdenk 1650a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1651a3d991bdSwdenk 1652a3d991bdSwdenk A 16bit integer containing the power consumption of the 1653a3d991bdSwdenk device in .1 of milliwatts. 1654a3d991bdSwdenk 1655a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1656a3d991bdSwdenk 1657a3d991bdSwdenk A byte containing the id of the VLAN. 1658a3d991bdSwdenk 1659c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1660c609719bSwdenk 1661c609719bSwdenk Several configurations allow to display the current 1662c609719bSwdenk status using a LED. For instance, the LED will blink 1663c609719bSwdenk fast while running U-Boot code, stop blinking as 1664c609719bSwdenk soon as a reply to a BOOTP request was received, and 1665c609719bSwdenk start blinking slow once the Linux kernel is running 1666c609719bSwdenk (supported by a status LED driver in the Linux 1667c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1668c609719bSwdenk feature in U-Boot. 1669c609719bSwdenk 1670c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1671c609719bSwdenk 1672c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1673c609719bSwdenk on those systems that support this (optional) 1674c609719bSwdenk feature, like the TQM8xxL modules. 1675c609719bSwdenk 1676c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1677c609719bSwdenk 1678b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1679b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 168011ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1681c609719bSwdenk 1682b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1683602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1684b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1685b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1686c609719bSwdenk command line interface. 1687c609719bSwdenk 1688bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1689c609719bSwdenk 1690b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1691b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1692b37c7e5eSwdenk support for I2C. 1693c609719bSwdenk 1694b37c7e5eSwdenk There are several other quantities that must also be 1695b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1696c609719bSwdenk 16976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1698b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 16996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 170011ccc33fSMarcel Ziswiler the CPU's i2c node address). 1701c609719bSwdenk 17028d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1703a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 17048d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 17058d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 17068d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1707b37c7e5eSwdenk 17085da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 17095da71efaSEric Millbrandt 17105da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 17115da71efaSEric Millbrandt chips might think that the current transfer is still 17125da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 17135da71efaSEric Millbrandt commands until the slave device responds. 17145da71efaSEric Millbrandt 1715b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1716b37c7e5eSwdenk 1717b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1718b37c7e5eSwdenk then the following macros need to be defined (examples are 1719b37c7e5eSwdenk from include/configs/lwmon.h): 1720c609719bSwdenk 1721c609719bSwdenk I2C_INIT 1722c609719bSwdenk 1723b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1724c609719bSwdenk controller or configure ports. 1725c609719bSwdenk 1726b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1727b37c7e5eSwdenk 1728c609719bSwdenk I2C_PORT 1729c609719bSwdenk 1730c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1731c609719bSwdenk assumes both bits are on the same port). Valid values 1732c609719bSwdenk are 0..3 for ports A..D. 1733c609719bSwdenk 1734c609719bSwdenk I2C_ACTIVE 1735c609719bSwdenk 1736c609719bSwdenk The code necessary to make the I2C data line active 1737c609719bSwdenk (driven). If the data line is open collector, this 1738c609719bSwdenk define can be null. 1739c609719bSwdenk 1740b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1741b37c7e5eSwdenk 1742c609719bSwdenk I2C_TRISTATE 1743c609719bSwdenk 1744c609719bSwdenk The code necessary to make the I2C data line tri-stated 1745c609719bSwdenk (inactive). If the data line is open collector, this 1746c609719bSwdenk define can be null. 1747c609719bSwdenk 1748b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1749b37c7e5eSwdenk 1750c609719bSwdenk I2C_READ 1751c609719bSwdenk 1752c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1753c609719bSwdenk FALSE if it is low. 1754c609719bSwdenk 1755b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1756b37c7e5eSwdenk 1757c609719bSwdenk I2C_SDA(bit) 1758c609719bSwdenk 1759c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1760c609719bSwdenk is FALSE, it clears it (low). 1761c609719bSwdenk 1762b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1763b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1764b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1765b37c7e5eSwdenk 1766c609719bSwdenk I2C_SCL(bit) 1767c609719bSwdenk 1768c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1769c609719bSwdenk is FALSE, it clears it (low). 1770c609719bSwdenk 1771b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1772b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1773b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1774b37c7e5eSwdenk 1775c609719bSwdenk I2C_DELAY 1776c609719bSwdenk 1777c609719bSwdenk This delay is invoked four times per clock cycle so this 1778c609719bSwdenk controls the rate of data transfer. The data rate thus 1779b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1780b37c7e5eSwdenk like: 1781b37c7e5eSwdenk 1782b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1783c609719bSwdenk 1784793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1785793b5726SMike Frysinger 1786793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1787793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1788793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1789793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1790793b5726SMike Frysinger 1791793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1792793b5726SMike Frysinger the generic GPIO functions. 1793793b5726SMike Frysinger 17946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 179547cd00faSwdenk 179647cd00faSwdenk When a board is reset during an i2c bus transfer 179747cd00faSwdenk chips might think that the current transfer is still 179847cd00faSwdenk in progress. On some boards it is possible to access 179947cd00faSwdenk the i2c SCLK line directly, either by using the 180047cd00faSwdenk processor pin as a GPIO or by having a second pin 180147cd00faSwdenk connected to the bus. If this option is defined a 180247cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 180347cd00faSwdenk is run early in the boot sequence. 180447cd00faSwdenk 180526a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 180626a33504SRichard Retanubun 180726a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 180826a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 180926a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 181026a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 181126a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 181226a33504SRichard Retanubun controller provide such a method. It is called at the end of 181326a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 181426a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 181526a33504SRichard Retanubun 181617ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 181717ea1177Swdenk 181817ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 181917ea1177Swdenk in u-boot bd_info structure based on u-boot environment 182017ea1177Swdenk variable "i2cfast". (see also i2cfast) 182117ea1177Swdenk 1822bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1823bb99ad6dSBen Warren 1824bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1825bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1826bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1827bb99ad6dSBen Warren Note that bus numbering is zero-based. 1828bb99ad6dSBen Warren 18296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1830bb99ad6dSBen Warren 1831bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 18320f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 18330f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 18340f89c54bSPeter Tyser a 1D array of device addresses 1835bb99ad6dSBen Warren 1836bb99ad6dSBen Warren e.g. 1837bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 18386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1839bb99ad6dSBen Warren 1840bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1841bb99ad6dSBen Warren 1842bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 18436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1844bb99ad6dSBen Warren 1845bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1846bb99ad6dSBen Warren 18476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1848be5e6181STimur Tabi 1849be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1850be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1851be5e6181STimur Tabi 18526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 18530dc018ecSStefan Roese 18540dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 18550dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 18560dc018ecSStefan Roese 18576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 18580dc018ecSStefan Roese 18590dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 18600dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 18610dc018ecSStefan Roese 18626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 18639ebbb54fSVictor Gallardo 18649ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 18659ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 18669ebbb54fSVictor Gallardo specified DTT device. 18679ebbb54fSVictor Gallardo 1868be5e6181STimur Tabi CONFIG_FSL_I2C 1869be5e6181STimur Tabi 1870be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 18717817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1872be5e6181STimur Tabi 187367b23a32SHeiko Schocher CONFIG_I2C_MUX 187467b23a32SHeiko Schocher 187567b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 187667b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 187767b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 187867b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 187967b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 188067b23a32SHeiko Schocher the muxes to activate this new "bus". 188167b23a32SHeiko Schocher 188267b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 188367b23a32SHeiko Schocher feature! 188467b23a32SHeiko Schocher 188567b23a32SHeiko Schocher Example: 188667b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 188767b23a32SHeiko Schocher The First mux with address 70 and channel 6 188867b23a32SHeiko Schocher The Second mux with address 71 and channel 4 188967b23a32SHeiko Schocher 189067b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 189167b23a32SHeiko Schocher 189267b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 189367b23a32SHeiko Schocher of I2C Busses with muxes: 189467b23a32SHeiko Schocher 189567b23a32SHeiko Schocher => i2c bus 189667b23a32SHeiko Schocher Busses reached over muxes: 189767b23a32SHeiko Schocher Bus ID: 2 189867b23a32SHeiko Schocher reached over Mux(es): 189967b23a32SHeiko Schocher pca9544a@70 ch: 4 190067b23a32SHeiko Schocher Bus ID: 3 190167b23a32SHeiko Schocher reached over Mux(es): 190267b23a32SHeiko Schocher pca9544a@70 ch: 6 190367b23a32SHeiko Schocher pca9544a@71 ch: 4 190467b23a32SHeiko Schocher => 190567b23a32SHeiko Schocher 190667b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1907f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1908f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 190967b23a32SHeiko Schocher the channel 4. 191067b23a32SHeiko Schocher 191167b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1912f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 191367b23a32SHeiko Schocher the 2 muxes. 191467b23a32SHeiko Schocher 191567b23a32SHeiko Schocher This option is actually implemented for the bitbanging 191667b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 191767b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 191867b23a32SHeiko Schocher to add this option to other architectures. 191967b23a32SHeiko Schocher 19202ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 19212ac6985aSAndrew Dyer 19222ac6985aSAndrew Dyer defining this will force the i2c_read() function in 19232ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 19242ac6985aSAndrew Dyer between writing the address pointer and reading the 19252ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 19262ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 19272ac6985aSAndrew Dyer devices can use either method, but some require one or 19282ac6985aSAndrew Dyer the other. 1929be5e6181STimur Tabi 1930c609719bSwdenk- SPI Support: CONFIG_SPI 1931c609719bSwdenk 1932c609719bSwdenk Enables SPI driver (so far only tested with 1933c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1934c609719bSwdenk D/As on the SACSng board) 1935c609719bSwdenk 19366639562eSYoshihiro Shimoda CONFIG_SH_SPI 19376639562eSYoshihiro Shimoda 19386639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 19396639562eSYoshihiro Shimoda only SH7757 is supported. 19406639562eSYoshihiro Shimoda 1941c609719bSwdenk CONFIG_SPI_X 1942c609719bSwdenk 1943c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1944c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1945c609719bSwdenk 1946c609719bSwdenk CONFIG_SOFT_SPI 1947c609719bSwdenk 1948c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1949c609719bSwdenk using hardware support. This is a general purpose 1950c609719bSwdenk driver that only requires three general I/O port pins 1951c609719bSwdenk (two outputs, one input) to function. If this is 1952c609719bSwdenk defined, the board configuration must define several 1953c609719bSwdenk SPI configuration items (port pins to use, etc). For 1954c609719bSwdenk an example, see include/configs/sacsng.h. 1955c609719bSwdenk 195604a9e118SBen Warren CONFIG_HARD_SPI 195704a9e118SBen Warren 195804a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 195904a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 196004a9e118SBen Warren must define a list of chip-select function pointers. 196104a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 196204a9e118SBen Warren example, see include/configs/mpc8349emds.h. 196304a9e118SBen Warren 196438254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 196538254f45SGuennadi Liakhovetski 196638254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 19672e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 196838254f45SGuennadi Liakhovetski 19690133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 19700133502eSMatthias Fuchs 19710133502eSMatthias Fuchs Enables FPGA subsystem. 19720133502eSMatthias Fuchs 19730133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 19740133502eSMatthias Fuchs 19750133502eSMatthias Fuchs Enables support for specific chip vendors. 19760133502eSMatthias Fuchs (ALTERA, XILINX) 19770133502eSMatthias Fuchs 19780133502eSMatthias Fuchs CONFIG_FPGA_<family> 19790133502eSMatthias Fuchs 19800133502eSMatthias Fuchs Enables support for FPGA family. 19810133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 19820133502eSMatthias Fuchs 19830133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1984c609719bSwdenk 1985c609719bSwdenk Specify the number of FPGA devices to support. 1986c609719bSwdenk 19876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1988c609719bSwdenk 1989c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1990c609719bSwdenk 19916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1992c609719bSwdenk 1993c609719bSwdenk Enable checks on FPGA configuration interface busy 1994c609719bSwdenk status by the configuration function. This option 1995c609719bSwdenk will require a board or device specific function to 1996c609719bSwdenk be written. 1997c609719bSwdenk 1998c609719bSwdenk CONFIG_FPGA_DELAY 1999c609719bSwdenk 2000c609719bSwdenk If defined, a function that provides delays in the FPGA 2001c609719bSwdenk configuration driver. 2002c609719bSwdenk 20036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2004c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2005c609719bSwdenk 20066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2007c609719bSwdenk 2008c609719bSwdenk Check for configuration errors during FPGA bitfile 2009c609719bSwdenk loading. For example, abort during Virtex II 2010c609719bSwdenk configuration if the INIT_B line goes low (which 2011c609719bSwdenk indicated a CRC error). 2012c609719bSwdenk 20136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2014c609719bSwdenk 2015c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2016c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2017c609719bSwdenk FPGA configuration sequence. The default time is 500 201811ccc33fSMarcel Ziswiler ms. 2019c609719bSwdenk 20206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2021c609719bSwdenk 2022c609719bSwdenk Maximum time to wait for BUSY to deassert during 202311ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2024c609719bSwdenk 20256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2026c609719bSwdenk 2027c609719bSwdenk Time to wait after FPGA configuration. The default is 202811ccc33fSMarcel Ziswiler 200 ms. 2029c609719bSwdenk 2030c609719bSwdenk- Configuration Management: 2031c609719bSwdenk CONFIG_IDENT_STRING 2032c609719bSwdenk 2033c609719bSwdenk If defined, this string will be added to the U-Boot 2034c609719bSwdenk version information (U_BOOT_VERSION) 2035c609719bSwdenk 2036c609719bSwdenk- Vendor Parameter Protection: 2037c609719bSwdenk 2038c609719bSwdenk U-Boot considers the values of the environment 2039c609719bSwdenk variables "serial#" (Board Serial Number) and 20407152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2041c609719bSwdenk are set once by the board vendor / manufacturer, and 2042c609719bSwdenk protects these variables from casual modification by 2043c609719bSwdenk the user. Once set, these variables are read-only, 2044c609719bSwdenk and write or delete attempts are rejected. You can 204511ccc33fSMarcel Ziswiler change this behaviour: 2046c609719bSwdenk 2047c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2048c609719bSwdenk file, the write protection for vendor parameters is 204947cd00faSwdenk completely disabled. Anybody can change or delete 2050c609719bSwdenk these parameters. 2051c609719bSwdenk 2052c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2053c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 205411ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2055c609719bSwdenk which can be changed exactly ONCE by the user. [The 2056c609719bSwdenk serial# is unaffected by this, i. e. it remains 2057c609719bSwdenk read-only.] 2058c609719bSwdenk 2059c609719bSwdenk- Protected RAM: 2060c609719bSwdenk CONFIG_PRAM 2061c609719bSwdenk 2062c609719bSwdenk Define this variable to enable the reservation of 2063c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2064c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2065c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2066c609719bSwdenk this default value by defining an environment 2067c609719bSwdenk variable "pram" to the number of kB you want to 2068c609719bSwdenk reserve. Note that the board info structure will 2069c609719bSwdenk still show the full amount of RAM. If pRAM is 2070c609719bSwdenk reserved, a new environment variable "mem" will 2071c609719bSwdenk automatically be defined to hold the amount of 2072c609719bSwdenk remaining RAM in a form that can be passed as boot 2073c609719bSwdenk argument to Linux, for instance like that: 2074c609719bSwdenk 2075fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2076c609719bSwdenk saveenv 2077c609719bSwdenk 2078c609719bSwdenk This way you can tell Linux not to use this memory, 2079c609719bSwdenk either, which results in a memory region that will 2080c609719bSwdenk not be affected by reboots. 2081c609719bSwdenk 2082c609719bSwdenk *WARNING* If your board configuration uses automatic 2083c609719bSwdenk detection of the RAM size, you must make sure that 2084c609719bSwdenk this memory test is non-destructive. So far, the 2085c609719bSwdenk following board configurations are known to be 2086c609719bSwdenk "pRAM-clean": 2087c609719bSwdenk 2088c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 2089c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 2090544d97e9SWolfgang Denk FLAGADM, TQM8260 2091c609719bSwdenk 2092c609719bSwdenk- Error Recovery: 2093c609719bSwdenk CONFIG_PANIC_HANG 2094c609719bSwdenk 2095c609719bSwdenk Define this variable to stop the system in case of a 2096c609719bSwdenk fatal error, so that you have to reset it manually. 2097c609719bSwdenk This is probably NOT a good idea for an embedded 209811ccc33fSMarcel Ziswiler system where you want the system to reboot 2099c609719bSwdenk automatically as fast as possible, but it may be 2100c609719bSwdenk useful during development since you can try to debug 2101c609719bSwdenk the conditions that lead to the situation. 2102c609719bSwdenk 2103c609719bSwdenk CONFIG_NET_RETRY_COUNT 2104c609719bSwdenk 2105c609719bSwdenk This variable defines the number of retries for 2106c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2107c609719bSwdenk before giving up the operation. If not defined, a 2108c609719bSwdenk default value of 5 is used. 2109c609719bSwdenk 211040cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 211140cb90eeSGuennadi Liakhovetski 211240cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 211340cb90eeSGuennadi Liakhovetski 2114c609719bSwdenk- Command Interpreter: 21158078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 211604a85b3bSwdenk 211704a85b3bSwdenk Enable auto completion of commands using TAB. 211804a85b3bSwdenk 21198078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 21208078f1a5SWolfgang Denk for the "hush" shell. 21218078f1a5SWolfgang Denk 21228078f1a5SWolfgang Denk 21236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2124c609719bSwdenk 2125c609719bSwdenk Define this variable to enable the "hush" shell (from 2126c609719bSwdenk Busybox) as command line interpreter, thus enabling 2127c609719bSwdenk powerful command line syntax like 2128c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2129c609719bSwdenk constructs ("shell scripts"). 2130c609719bSwdenk 2131c609719bSwdenk If undefined, you get the old, much simpler behaviour 2132c609719bSwdenk with a somewhat smaller memory footprint. 2133c609719bSwdenk 2134c609719bSwdenk 21356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2136c609719bSwdenk 2137c609719bSwdenk This defines the secondary prompt string, which is 2138c609719bSwdenk printed when the command interpreter needs more input 2139c609719bSwdenk to complete a command. Usually "> ". 2140c609719bSwdenk 2141c609719bSwdenk Note: 2142c609719bSwdenk 2143c609719bSwdenk In the current implementation, the local variables 2144c609719bSwdenk space and global environment variables space are 2145c609719bSwdenk separated. Local variables are those you define by 21463b57fe0aSwdenk simply typing `name=value'. To access a local 2147c609719bSwdenk variable later on, you have write `$name' or 21483b57fe0aSwdenk `${name}'; to execute the contents of a variable 21493b57fe0aSwdenk directly type `$name' at the command prompt. 2150c609719bSwdenk 2151c609719bSwdenk Global environment variables are those you use 2152c609719bSwdenk setenv/printenv to work with. To run a command stored 2153c609719bSwdenk in such a variable, you need to use the run command, 2154c609719bSwdenk and you must not use the '$' sign to access them. 2155c609719bSwdenk 2156c609719bSwdenk To store commands and special characters in a 2157c609719bSwdenk variable, please use double quotation marks 2158c609719bSwdenk surrounding the whole text of the variable, instead 2159c609719bSwdenk of the backslashes before semicolons and special 2160c609719bSwdenk symbols. 2161c609719bSwdenk 2162aa0c71acSWolfgang Denk- Commandline Editing and History: 2163aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2164aa0c71acSWolfgang Denk 216511ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2166aa0c71acSWolfgang Denk commandline input operations 2167aa0c71acSWolfgang Denk 2168a8c7c708Swdenk- Default Environment: 2169c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2170c609719bSwdenk 2171c609719bSwdenk Define this to contain any number of null terminated 2172c609719bSwdenk strings (variable = value pairs) that will be part of 21737152b1d0Swdenk the default environment compiled into the boot image. 21742262cfeeSwdenk 2175c609719bSwdenk For example, place something like this in your 2176c609719bSwdenk board's config file: 2177c609719bSwdenk 2178c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2179c609719bSwdenk "myvar1=value1\0" \ 2180c609719bSwdenk "myvar2=value2\0" 2181c609719bSwdenk 2182c609719bSwdenk Warning: This method is based on knowledge about the 2183c609719bSwdenk internal format how the environment is stored by the 21842262cfeeSwdenk U-Boot code. This is NOT an official, exported 2185c609719bSwdenk interface! Although it is unlikely that this format 21867152b1d0Swdenk will change soon, there is no guarantee either. 2187c609719bSwdenk You better know what you are doing here. 2188c609719bSwdenk 2189c609719bSwdenk Note: overly (ab)use of the default environment is 2190c609719bSwdenk discouraged. Make sure to check other ways to preset 219174de7aefSWolfgang Denk the environment like the "source" command or the 2192c609719bSwdenk boot command first. 2193c609719bSwdenk 2194a8c7c708Swdenk- DataFlash Support: 21952abbe075Swdenk CONFIG_HAS_DATAFLASH 21962abbe075Swdenk 21972abbe075Swdenk Defining this option enables DataFlash features and 21982abbe075Swdenk allows to read/write in Dataflash via the standard 21992abbe075Swdenk commands cp, md... 22002abbe075Swdenk 2201f61ec45eSEric Nelson- Serial Flash support 2202f61ec45eSEric Nelson CONFIG_CMD_SF 2203f61ec45eSEric Nelson 2204f61ec45eSEric Nelson Defining this option enables SPI flash commands 2205f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2206f61ec45eSEric Nelson 2207f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2208f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2209f61ec45eSEric Nelson commands. 2210f61ec45eSEric Nelson 2211f61ec45eSEric Nelson The following defaults may be provided by the platform 2212f61ec45eSEric Nelson to handle the common case when only a single serial 2213f61ec45eSEric Nelson flash is present on the system. 2214f61ec45eSEric Nelson 2215f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2216f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2217f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2218f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2219f61ec45eSEric Nelson 22203f85ce27Swdenk- SystemACE Support: 22213f85ce27Swdenk CONFIG_SYSTEMACE 22223f85ce27Swdenk 22233f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 22243f85ce27Swdenk chips attached via some sort of local bus. The address 222511ccc33fSMarcel Ziswiler of the chip must also be defined in the 22266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 22273f85ce27Swdenk 22283f85ce27Swdenk #define CONFIG_SYSTEMACE 22296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 22303f85ce27Swdenk 22313f85ce27Swdenk When SystemACE support is added, the "ace" device type 22323f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 22333f85ce27Swdenk 2234ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2235ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2236ecb0ccd9SWolfgang Denk 223728cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2238ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 223928cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2240ecb0ccd9SWolfgang Denk number generator is used. 2241ecb0ccd9SWolfgang Denk 224228cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 224328cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 224428cb9375SWolfgang Denk defined, the normal port 69 is used. 224528cb9375SWolfgang Denk 224628cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2247ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2248ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2249ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2250ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2251ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2252ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2253ecb0ccd9SWolfgang Denk 2254a8c7c708Swdenk- Show boot progress: 2255c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2256c609719bSwdenk 2257c609719bSwdenk Defining this option allows to add some board- 2258c609719bSwdenk specific code (calling a user-provided function 2259c609719bSwdenk "show_boot_progress(int)") that enables you to show 2260c609719bSwdenk the system's boot progress on some display (for 2261c609719bSwdenk example, some LED's) on your board. At the moment, 2262c609719bSwdenk the following checkpoints are implemented: 2263c609719bSwdenk 2264*3a608ca0SSimon Glass- Detailed boot stage timing 2265*3a608ca0SSimon Glass CONFIG_BOOTSTAGE 2266*3a608ca0SSimon Glass Define this option to get detailed timing of each stage 2267*3a608ca0SSimon Glass of the boot process. 2268*3a608ca0SSimon Glass 2269*3a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 2270*3a608ca0SSimon Glass This is the number of available user bootstage records. 2271*3a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 2272*3a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 2273*3a608ca0SSimon Glass the limit, recording will stop. 2274*3a608ca0SSimon Glass 2275*3a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 2276*3a608ca0SSimon Glass Define this to print a report before boot, similar to this: 2277*3a608ca0SSimon Glass 2278*3a608ca0SSimon Glass Timer summary in microseconds: 2279*3a608ca0SSimon Glass Mark Elapsed Stage 2280*3a608ca0SSimon Glass 0 0 reset 2281*3a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 2282*3a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 2283*3a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 2284*3a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 2285*3a608ca0SSimon Glass 3,910,375 250,777 main_loop 2286*3a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 2287*3a608ca0SSimon Glass 30,361,327 445,160 start_kernel 2288*3a608ca0SSimon Glass 22891372cce2SMarian BalakowiczLegacy uImage format: 22901372cce2SMarian Balakowicz 2291c609719bSwdenk Arg Where When 2292c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2293c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2294c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2295c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2296c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2297c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2298c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2299c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2300c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 23011372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2302c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2303c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2304c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2305c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 23061372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2307c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 23081372cce2SMarian Balakowicz 23091372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 23101372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 23111372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 23121372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 23131372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 23141372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 23151372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 231611ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 23171372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 23181372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 23191372cce2SMarian Balakowicz 2320ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2321c609719bSwdenk 2322a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 232363e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 232463e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 232563e73c9aSwdenk 2326566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2327566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2328566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2329566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2330566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2331566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2332566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2333566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2334566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2335566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2336566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2337566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2338566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2339566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2340566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2341566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2342566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2343566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2344566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2345566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2346566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2347566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2348566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2349566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2350566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2351566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2352566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2353566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2354566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2355566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2356566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2357566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2358566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2359566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2360566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2361566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2362566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2363566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2364566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2365566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2366566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2367566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2368566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2369566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2370566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2371566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2372566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2373c609719bSwdenk 2374566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2375c609719bSwdenk 2376566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2377566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2378566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2379206c60cbSwdenk 2380566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2381566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 238211ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2383566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2384566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2385566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 238674de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 238774de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2388566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2389c609719bSwdenk 23901372cce2SMarian BalakowiczFIT uImage format: 23911372cce2SMarian Balakowicz 23921372cce2SMarian Balakowicz Arg Where When 23931372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 23941372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 23951372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 23961372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 23971372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 23981372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2399f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 24001372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 24011372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 24021372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 24031372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 24041372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 240511ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 240611ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 24071372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 24081372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 24091372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 24101372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 24111372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 24121372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 24131372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 24141372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 24151372cce2SMarian Balakowicz 24161372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 24171372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 24181372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 241911ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 24201372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 24211372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 24221372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 24231372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 24241372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 24251372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 24261372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 24271372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 24281372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 24291372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 24301372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 24311372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 24321372cce2SMarian Balakowicz 243311ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 24341372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 24351372cce2SMarian Balakowicz 243611ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 24371372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 24381372cce2SMarian Balakowicz 243911ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 24401372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 24411372cce2SMarian Balakowicz 24424cf2609bSWolfgang Denk- Standalone program support: 24434cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 24444cf2609bSWolfgang Denk 24456feff899SWolfgang Denk This option defines a board specific value for the 24466feff899SWolfgang Denk address where standalone program gets loaded, thus 24476feff899SWolfgang Denk overwriting the architecture dependent default 24484cf2609bSWolfgang Denk settings. 24494cf2609bSWolfgang Denk 24504cf2609bSWolfgang Denk- Frame Buffer Address: 24514cf2609bSWolfgang Denk CONFIG_FB_ADDR 24524cf2609bSWolfgang Denk 24534cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 24544cf2609bSWolfgang Denk address for frame buffer. 24554cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 24564cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 24576feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 24584cf2609bSWolfgang Denk 24594cf2609bSWolfgang Denk Please see board_init_f function. 24604cf2609bSWolfgang Denk 2461cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2462cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2463cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2464cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2465cccfc2abSDetlev Zundel 2466cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2467cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2468cccfc2abSDetlev Zundel 2469cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2470cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2471cccfc2abSDetlev Zundel 2472cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2473cccfc2abSDetlev Zundel Needed for mtdparts command support. 2474cccfc2abSDetlev Zundel 2475cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2476cccfc2abSDetlev Zundel 2477cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2478cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2479cccfc2abSDetlev Zundel 24806a11cf48SDaniel Schwierzeck- SPL framework 24816a11cf48SDaniel Schwierzeck CONFIG_SPL 24826a11cf48SDaniel Schwierzeck Enable building of SPL globally. 24836a11cf48SDaniel Schwierzeck 24846a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 24856a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 24866a11cf48SDaniel Schwierzeck 24876a11cf48SDaniel Schwierzeck CONFIG_SPL_LDSCRIPT 24886a11cf48SDaniel Schwierzeck LDSCRIPT for linking the SPL binary. 24896a11cf48SDaniel Schwierzeck 24906a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 24916a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 24926a11cf48SDaniel Schwierzeck 24936a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 24946a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 24956a11cf48SDaniel Schwierzeck 24966a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 24976a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 24986a11cf48SDaniel Schwierzeck 24996a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 25006a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 25016a11cf48SDaniel Schwierzeck 25026a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 25036a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 25046a11cf48SDaniel Schwierzeck 25056a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 25066a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 25076a11cf48SDaniel Schwierzeck 25086a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 25096a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 25106a11cf48SDaniel Schwierzeck 25116a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 25126a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 25136a11cf48SDaniel Schwierzeck 25146a11cf48SDaniel Schwierzeck CONFIG_SPL_FAT_SUPPORT 25156a11cf48SDaniel Schwierzeck Support for fs/fat/libfat.o in SPL binary 25166a11cf48SDaniel Schwierzeck 25176a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 25186a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 25191372cce2SMarian Balakowicz 2520c609719bSwdenkModem Support: 2521c609719bSwdenk-------------- 2522c609719bSwdenk 2523566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2524c609719bSwdenk 252511ccc33fSMarcel Ziswiler- Modem support enable: 2526c609719bSwdenk CONFIG_MODEM_SUPPORT 2527c609719bSwdenk 2528c609719bSwdenk- RTS/CTS Flow control enable: 2529c609719bSwdenk CONFIG_HWFLOW 2530c609719bSwdenk 2531c609719bSwdenk- Modem debug support: 2532c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2533c609719bSwdenk 2534c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2535c609719bSwdenk for modem support. Useful only with BDI2000. 2536c609719bSwdenk 2537a8c7c708Swdenk- Interrupt support (PPC): 2538a8c7c708Swdenk 2539a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2540a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 254111ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2542a8c7c708Swdenk should set decrementer_count to appropriate value. If 254311ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2544a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 254511ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2546a8c7c708Swdenk specific handling. If board has watchdog / status_led 2547a8c7c708Swdenk / other_activity_monitor it works automatically from 2548a8c7c708Swdenk general timer_interrupt(). 2549a8c7c708Swdenk 2550c609719bSwdenk- General: 2551c609719bSwdenk 2552c609719bSwdenk In the target system modem support is enabled when a 2553c609719bSwdenk specific key (key combination) is pressed during 2554c609719bSwdenk power-on. Otherwise U-Boot will boot normally 255511ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2556c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2557c609719bSwdenk function, returning 1 and thus enabling modem 2558c609719bSwdenk initialization. 2559c609719bSwdenk 2560c609719bSwdenk If there are no modem init strings in the 2561c609719bSwdenk environment, U-Boot proceed to autoboot; the 2562c609719bSwdenk previous output (banner, info printfs) will be 256311ccc33fSMarcel Ziswiler suppressed, though. 2564c609719bSwdenk 2565c609719bSwdenk See also: doc/README.Modem 2566c609719bSwdenk 25679660e442SHelmut RaigerBoard initialization settings: 25689660e442SHelmut Raiger------------------------------ 25699660e442SHelmut Raiger 25709660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 25719660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 25729660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 25739660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 25749660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 25759660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 25769660e442SHelmut Raiger 25779660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 25789660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 25799660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 25809660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2581c609719bSwdenk 2582c609719bSwdenkConfiguration Settings: 2583c609719bSwdenk----------------------- 2584c609719bSwdenk 25856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2586c609719bSwdenk undefine this when you're short of memory. 2587c609719bSwdenk 25882fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 25892fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 25902fb2604dSPeter Tyser 25916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2592c609719bSwdenk prompt for user input. 2593c609719bSwdenk 25946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2595c609719bSwdenk 25966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2597c609719bSwdenk 25986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2599c609719bSwdenk 26006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2601c609719bSwdenk the application (usually a Linux kernel) when it is 2602c609719bSwdenk booted 2603c609719bSwdenk 26046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2605c609719bSwdenk List of legal baudrate settings for this board. 2606c609719bSwdenk 26076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2608c609719bSwdenk Suppress display of console information at boot. 2609c609719bSwdenk 26106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2611c609719bSwdenk If the board specific function 2612c609719bSwdenk extern int overwrite_console (void); 2613c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2614c609719bSwdenk serial port, else the settings in the environment are used. 2615c609719bSwdenk 26166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2617c609719bSwdenk Enable the call to overwrite_console(). 2618c609719bSwdenk 26196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2620c609719bSwdenk Enable overwrite of previous console environment settings. 2621c609719bSwdenk 26226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2623c609719bSwdenk Begin and End addresses of the area used by the 2624c609719bSwdenk simple memory test. 2625c609719bSwdenk 26266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2627c609719bSwdenk Enable an alternate, more extensive memory test. 2628c609719bSwdenk 26296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 26305f535fe1Swdenk Scratch address used by the alternate memory test 26315f535fe1Swdenk You only need to set this if address zero isn't writeable 26325f535fe1Swdenk 26336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 26346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 263514f73ca6SStefan Roese this specified memory area will get subtracted from the top 263611ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 263714f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 263814f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 263914f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 26405e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 264114f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 26425e12e75dSStefan Roese will have to get fixed in Linux additionally. 264314f73ca6SStefan Roese 264414f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 264514f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 264614f73ca6SStefan Roese be touched. 264714f73ca6SStefan Roese 264814f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 264914f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 265014f73ca6SStefan Roese then the end address of the Linux memory will be located at a 265114f73ca6SStefan Roese non page size aligned address and this could cause major 265214f73ca6SStefan Roese problems. 265314f73ca6SStefan Roese 26546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2655c609719bSwdenk Default load address for network file downloads 2656c609719bSwdenk 26576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2658c609719bSwdenk Enable temporary baudrate change while serial download 2659c609719bSwdenk 26606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2661c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2662c609719bSwdenk 26636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2664c609719bSwdenk Physical start address of Motherboard I/O (if using a 2665c609719bSwdenk Cogent motherboard) 2666c609719bSwdenk 26676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2668c609719bSwdenk Physical start address of Flash memory. 2669c609719bSwdenk 26706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2671c609719bSwdenk Physical start address of boot monitor code (set by 2672c609719bSwdenk make config files to be same as the text base address 267314d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 26746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2675c609719bSwdenk 26766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 26773b57fe0aSwdenk Size of memory reserved for monitor code, used to 26783b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 26793b57fe0aSwdenk embedded within the U-Boot image, or in a separate 26803b57fe0aSwdenk flash sector. 2681c609719bSwdenk 26826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2683c609719bSwdenk Size of DRAM reserved for malloc() use. 2684c609719bSwdenk 26856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 268615940c9aSStefan Roese Normally compressed uImages are limited to an 268715940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 26886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 268915940c9aSStefan Roese to adjust this setting to your needs. 2690c609719bSwdenk 26916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2692c609719bSwdenk Maximum size of memory mapped by the startup code of 2693c609719bSwdenk the Linux kernel; all data that must be processed by 26947d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 26957d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 26967d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 26977d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2698c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2699c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2700c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2701c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2702c609719bSwdenk 2703fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2704fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2705fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2706fca43cc8SJohn Rigby is enabled. 2707fca43cc8SJohn Rigby 2708fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2709fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2710fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2711fca43cc8SJohn Rigby 2712fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2713fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2714fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2715fca43cc8SJohn Rigby 27166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2717c609719bSwdenk Max number of Flash memory banks 2718c609719bSwdenk 27196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2720c609719bSwdenk Max number of sectors on a Flash chip 2721c609719bSwdenk 27226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2723c609719bSwdenk Timeout for Flash erase operations (in ms) 2724c609719bSwdenk 27256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2726c609719bSwdenk Timeout for Flash write operations (in ms) 2727c609719bSwdenk 27286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 27298564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 27308564acf9Swdenk 27316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 27328564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 27338564acf9Swdenk 27346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 27358564acf9Swdenk If defined, hardware flash sectors protection is used 27368564acf9Swdenk instead of U-Boot software protection. 27378564acf9Swdenk 27386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2739c609719bSwdenk 2740c609719bSwdenk Enable TFTP transfers directly to flash memory; 2741c609719bSwdenk without this option such a download has to be 2742c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2743c609719bSwdenk copy from RAM to flash. 2744c609719bSwdenk 2745c609719bSwdenk The two-step approach is usually more reliable, since 2746c609719bSwdenk you can check if the download worked before you erase 274711ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 274811ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2749c609719bSwdenk downloaded image) this option may be very useful. 2750c609719bSwdenk 27516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2752c609719bSwdenk Define if the flash driver uses extra elements in the 27535653fc33Swdenk common flash structure for storing flash geometry. 27545653fc33Swdenk 275500b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 27565653fc33Swdenk This option also enables the building of the cfi_flash driver 27575653fc33Swdenk in the drivers directory 275853cf9435Sstroese 275991809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 276091809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 276191809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 276291809ed5SPiotr Ziecik to the MTD layer. 276391809ed5SPiotr Ziecik 27646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 276596ef831fSGuennadi Liakhovetski Use buffered writes to flash. 276696ef831fSGuennadi Liakhovetski 276796ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 276896ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 276996ef831fSGuennadi Liakhovetski write commands. 277096ef831fSGuennadi Liakhovetski 27716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 27725568e613SStefan Roese If this option is defined, the common CFI flash doesn't 27735568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 27745568e613SStefan Roese is useful, if some of the configured banks are only 27755568e613SStefan Roese optionally available. 27765568e613SStefan Roese 27779a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 27789a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 27799a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 27809a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 27819a042e9cSJerry Van Baren 27826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 278311ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 278411ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 278553cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 278653cf9435Sstroese buffers can be full shortly after enabling the interface 278711ccc33fSMarcel Ziswiler on high Ethernet traffic. 278853cf9435Sstroese Defaults to 4 if not defined. 2789c609719bSwdenk 2790ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2791ea882bafSWolfgang Denk 2792ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2793ea882bafSWolfgang Denk internally to store the environment settings. The default 2794ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2795ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2796ea882bafSWolfgang Denk lib/hashtable.c for details. 2797ea882bafSWolfgang Denk 2798c609719bSwdenkThe following definitions that deal with the placement and management 2799c609719bSwdenkof environment data (variable area); in general, we support the 2800c609719bSwdenkfollowing configurations: 2801c609719bSwdenk 2802c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2803c3eb3fe4SMike Frysinger 2804c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2805c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2806c3eb3fe4SMike Frysinger 28075a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2808c609719bSwdenk 2809c609719bSwdenk Define this if the environment is in flash memory. 2810c609719bSwdenk 2811c609719bSwdenk a) The environment occupies one whole flash sector, which is 2812c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2813c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2814c609719bSwdenk sector" type flash chips, which have several smaller 2815c609719bSwdenk sectors at the start or the end. For instance, such a 2816c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2817c609719bSwdenk such a case you would place the environment in one of the 2818c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2819c609719bSwdenk "top boot sector" type flash chips, you would put the 2820c609719bSwdenk environment in one of the last sectors, leaving a gap 2821c609719bSwdenk between U-Boot and the environment. 2822c609719bSwdenk 28230e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2824c609719bSwdenk 2825c609719bSwdenk Offset of environment data (variable area) to the 2826c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2827c609719bSwdenk type flash chips the second sector can be used: the offset 2828c609719bSwdenk for this sector is given here. 2829c609719bSwdenk 28306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2831c609719bSwdenk 28320e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2833c609719bSwdenk 2834c609719bSwdenk This is just another way to specify the start address of 2835c609719bSwdenk the flash sector containing the environment (instead of 28360e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2837c609719bSwdenk 28380e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2839c609719bSwdenk 2840c609719bSwdenk Size of the sector containing the environment. 2841c609719bSwdenk 2842c609719bSwdenk 2843c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2844c609719bSwdenk In such a case you don't want to spend a whole sector for 2845c609719bSwdenk the environment. 2846c609719bSwdenk 28470e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2848c609719bSwdenk 28495a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 28500e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2851c609719bSwdenk of this flash sector for the environment. This saves 2852c609719bSwdenk memory for the RAM copy of the environment. 2853c609719bSwdenk 2854c609719bSwdenk It may also save flash memory if you decide to use this 2855c609719bSwdenk when your environment is "embedded" within U-Boot code, 2856c609719bSwdenk since then the remainder of the flash sector could be used 2857c609719bSwdenk for U-Boot code. It should be pointed out that this is 2858c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2859c609719bSwdenk updating the environment in flash makes it always 2860c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2861c609719bSwdenk wrong before the contents has been restored from a copy in 2862c609719bSwdenk RAM, your target system will be dead. 2863c609719bSwdenk 28640e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 28650e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2866c609719bSwdenk 2867c609719bSwdenk These settings describe a second storage area used to hold 286811ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 28693e38691eSwdenk a valid backup copy in case there is a power failure during 2870c609719bSwdenk a "saveenv" operation. 2871c609719bSwdenk 2872c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2873c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2874c609719bSwdenkaccordingly! 2875c609719bSwdenk 2876c609719bSwdenk 28779314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2878c609719bSwdenk 2879c609719bSwdenk Define this if you have some non-volatile memory device 2880c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2881c609719bSwdenk environment. 2882c609719bSwdenk 28830e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 28840e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2885c609719bSwdenk 288611ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2887c609719bSwdenk want to use for environment. It is assumed that this memory 2888c609719bSwdenk can just be read and written to, without any special 2889c609719bSwdenk provision. 2890c609719bSwdenk 2891c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2892c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 289311ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2894c609719bSwdenkU-Boot will hang. 2895c609719bSwdenk 2896c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2897c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2898c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2899c609719bSwdenkto save the current settings. 2900c609719bSwdenk 2901c609719bSwdenk 2902bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2903c609719bSwdenk 2904c609719bSwdenk Use this if you have an EEPROM or similar serial access 2905c609719bSwdenk device and a driver for it. 2906c609719bSwdenk 29070e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 29080e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2909c609719bSwdenk 2910c609719bSwdenk These two #defines specify the offset and size of the 2911c609719bSwdenk environment area within the total memory of your EEPROM. 2912c609719bSwdenk 29136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2914c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2915c609719bSwdenk The default address is zero. 2916c609719bSwdenk 29176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2918c609719bSwdenk If defined, the number of bits used to address bytes in a 2919c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2920c609719bSwdenk would require six bits. 2921c609719bSwdenk 29226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2923c609719bSwdenk If defined, the number of milliseconds to delay between 2924c609719bSwdenk page writes. The default is zero milliseconds. 2925c609719bSwdenk 29266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2927c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2928c609719bSwdenk that this is NOT the chip address length! 2929c609719bSwdenk 29306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 29315cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 29325cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 29335cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 29345cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 29355cf91d6bSwdenk byte chips. 29365cf91d6bSwdenk 29375cf91d6bSwdenk Note that we consider the length of the address field to 29385cf91d6bSwdenk still be one byte because the extra address bits are hidden 29395cf91d6bSwdenk in the chip address. 29405cf91d6bSwdenk 29416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2942c609719bSwdenk The size in bytes of the EEPROM device. 2943c609719bSwdenk 2944548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 2945548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 2946548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 2947548738b4SHeiko Schocher 2948548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 2949548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 2950548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 2951548738b4SHeiko Schocher EEPROM. For example: 2952548738b4SHeiko Schocher 2953548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 2954548738b4SHeiko Schocher 2955548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 2956548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 2957c609719bSwdenk 2958057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 29595779d8d9Swdenk 29605779d8d9Swdenk Define this if you have a DataFlash memory device which you 29615779d8d9Swdenk want to use for the environment. 29625779d8d9Swdenk 29630e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 29640e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 29650e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 29665779d8d9Swdenk 29675779d8d9Swdenk These three #defines specify the offset and size of the 29685779d8d9Swdenk environment area within the total memory of your DataFlash placed 29695779d8d9Swdenk at the specified address. 29705779d8d9Swdenk 297151bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 297213a5695bSwdenk 297313a5695bSwdenk Define this if you have a NAND device which you want to use 297413a5695bSwdenk for the environment. 297513a5695bSwdenk 29760e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 29770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 297813a5695bSwdenk 297913a5695bSwdenk These two #defines specify the offset and size of the environment 2980fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 2981fdd813deSScott Wood aligned to an erase block boundary. 29825779d8d9Swdenk 2983fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 2984e443c944SMarkus Klotzbuecher 29850e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2986fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 2987fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 2988fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 2989fdd813deSScott Wood aligned to an erase block boundary. 2990e443c944SMarkus Klotzbuecher 2991fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 2992fdd813deSScott Wood 2993fdd813deSScott Wood Specifies the length of the region in which the environment 2994fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 2995fdd813deSScott Wood block size. Specifying a range with more erase blocks than 2996fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 2997fdd813deSScott Wood the range to be avoided. 2998fdd813deSScott Wood 2999fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3000fdd813deSScott Wood 3001fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3002fdd813deSScott Wood environment from block zero's out-of-band data. The 3003fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3004fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3005fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3006e443c944SMarkus Klotzbuecher 3007b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3008b74ab737SGuennadi Liakhovetski 3009b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3010b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3011b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3012b74ab737SGuennadi Liakhovetski 30136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3014c609719bSwdenk 3015c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3016c609719bSwdenk area is used at an early stage (ROM part) if the environment 3017c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3018c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3019c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3020c609719bSwdenk to be a good choice since it makes it far enough from the 3021c609719bSwdenk start of the data area as well as from the stack pointer. 3022c609719bSwdenk 3023e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3024c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3025cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3026c609719bSwdenkuntil then to read environment variables. 3027c609719bSwdenk 302885ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 302985ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 303085ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 303185ec0bccSwdenknecessary, because the first environment variable we need is the 303285ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 303385ec0bccSwdenkhave any device yet where we could complain.] 3034c609719bSwdenk 3035c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3036c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 303785ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3038c609719bSwdenk 30396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3040fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3041fc3e2165Swdenk 30426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3043fc3e2165Swdenk also needs to be defined. 3044fc3e2165Swdenk 30456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3046fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3047c609719bSwdenk 3048f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3049f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3050f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3051f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3052f5675aa5SRon Madrid space for already greatly restricted images, including but not 3053f5675aa5SRon Madrid limited to NAND_SPL configurations. 3054f5675aa5SRon Madrid 3055c609719bSwdenkLow Level (hardware related) configuration options: 3056dc7c9a1aSwdenk--------------------------------------------------- 3057c609719bSwdenk 30586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3059c609719bSwdenk Cache Line Size of the CPU. 3060c609719bSwdenk 30616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3062c609719bSwdenk Default address of the IMMR after system reset. 30632535d602Swdenk 30642535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 30652535d602Swdenk and RPXsuper) to be able to adjust the position of 30662535d602Swdenk the IMMR register after a reset. 3067c609719bSwdenk 3068e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3069e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3070e46fedfeSTimur Tabi PowerPC SOCs. 3071e46fedfeSTimur Tabi 3072e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3073e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3074e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3075e46fedfeSTimur Tabi 3076e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3077e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3078e46fedfeSTimur Tabi 3079e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3080e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3081e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3082e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3083e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3084e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3085e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3086e46fedfeSTimur Tabi 3087e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3088e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3089e46fedfeSTimur Tabi 3090e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3091e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3092e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3093e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3094e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3095e46fedfeSTimur Tabi 3096e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3097e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3098e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3099e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3100e46fedfeSTimur Tabi 3101e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3102e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3103e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3104e46fedfeSTimur Tabi 31057f6c2cbcSwdenk- Floppy Disk Support: 31066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 31077f6c2cbcSwdenk 31087f6c2cbcSwdenk the default drive number (default value 0) 31097f6c2cbcSwdenk 31106d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 31117f6c2cbcSwdenk 311211ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 31137f6c2cbcSwdenk (default value 1) 31147f6c2cbcSwdenk 31156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 31167f6c2cbcSwdenk 31177f6c2cbcSwdenk defines the offset of register from address. It 31187f6c2cbcSwdenk depends on which part of the data bus is connected to 311911ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 31207f6c2cbcSwdenk 31216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 31226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 31237f6c2cbcSwdenk default value. 31247f6c2cbcSwdenk 31256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 31267f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 31277f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 31287f6c2cbcSwdenk source code. It is used to make hardware dependant 31297f6c2cbcSwdenk initializations. 31307f6c2cbcSwdenk 31310abddf82SMacpaul Lin- CONFIG_IDE_AHB: 31320abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 31330abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 31340abddf82SMacpaul Lin When software is doing ATA command and data transfer to 31350abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 31360abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 31370abddf82SMacpaul Lin is requierd. 31380abddf82SMacpaul Lin 31396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 314025d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 314125d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3142c609719bSwdenk 31436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3144c609719bSwdenk 31457152b1d0Swdenk Start address of memory area that can be used for 3146c609719bSwdenk initial data and stack; please note that this must be 3147c609719bSwdenk writable memory that is working WITHOUT special 3148c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3149c609719bSwdenk will become available only after programming the 3150c609719bSwdenk memory controller and running certain initialization 3151c609719bSwdenk sequences. 3152c609719bSwdenk 3153c609719bSwdenk U-Boot uses the following memory types: 3154c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3155c609719bSwdenk - MPC824X: data cache 3156c609719bSwdenk - PPC4xx: data cache 3157c609719bSwdenk 31586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3159c609719bSwdenk 3160c609719bSwdenk Offset of the initial data structure in the memory 31616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 31626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3163c609719bSwdenk data is located at the end of the available space 3164553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 31656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 31666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 31676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3168c609719bSwdenk 3169c609719bSwdenk Note: 3170c609719bSwdenk On the MPC824X (or other systems that use the data 3171c609719bSwdenk cache for initial memory) the address chosen for 31726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3173c609719bSwdenk point to an otherwise UNUSED address space between 3174c609719bSwdenk the top of RAM and the start of the PCI space. 3175c609719bSwdenk 31766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3177c609719bSwdenk 31786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3179c609719bSwdenk 31806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3181c609719bSwdenk 31826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3183c609719bSwdenk 31846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3185c609719bSwdenk 31866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3187c609719bSwdenk 31886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3189c609719bSwdenk SDRAM timing 3190c609719bSwdenk 31916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3192c609719bSwdenk periodic timer for refresh 3193c609719bSwdenk 31946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3195c609719bSwdenk 31966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 31976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 31986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 31996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3200c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3201c609719bSwdenk 3202c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 32036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 32046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3205c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3206c609719bSwdenk 32076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 32086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3209c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3210c609719bSwdenk Prescaler definitions (SDRAM timing) 3211c609719bSwdenk 32126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3213c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3214c609719bSwdenk define relocation offset in DPRAM [DSP2] 3215c609719bSwdenk 32166d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3217b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3218b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3219b423d055SHeiko Schocher 32206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3221c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3222c609719bSwdenk define relocation offset in DPRAM [SCC4] 3223c609719bSwdenk 32246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3225c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3226c609719bSwdenk wrong setting might damage your board. Read 3227c609719bSwdenk doc/README.MBX before setting this variable! 3228c609719bSwdenk 32296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3230ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3231ea909b76Swdenk (Power On Self Tests). This definition overrides 3232ea909b76Swdenk #define'd default value in commproc.h resp. 3233ea909b76Swdenk cpm_8260.h. 3234ea909b76Swdenk 32356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 32366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 32376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 32386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 32396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 32406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 32416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 32426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3243a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 32445d232d0eSwdenk 32459cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 32469cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 32479cacf4fcSDirk Eibach required. 32489cacf4fcSDirk Eibach 3249a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3250a09b9b68SKumar Gala Chip has SRIO or not 3251a09b9b68SKumar Gala 3252a09b9b68SKumar Gala- CONFIG_SRIO1: 3253a09b9b68SKumar Gala Board has SRIO 1 port available 3254a09b9b68SKumar Gala 3255a09b9b68SKumar Gala- CONFIG_SRIO2: 3256a09b9b68SKumar Gala Board has SRIO 2 port available 3257a09b9b68SKumar Gala 3258a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3259a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3260a09b9b68SKumar Gala 3261a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3262a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3263a09b9b68SKumar Gala 3264a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3265a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3266a09b9b68SKumar Gala 3267eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3268eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3269eced4626SAlex Waterman 16 bit bus. 3270eced4626SAlex Waterman 3271eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3272eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3273eced4626SAlex Waterman a default value will be used. 3274eced4626SAlex Waterman 3275bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3276218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3277218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3278218ca724SWolfgang Denk 3279bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3280bb99ad6dSBen Warren I2C address of the SPD EEPROM 3281bb99ad6dSBen Warren 32826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3283218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3284218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3285218ca724SWolfgang Denk to something your driver can deal with. 3286bb99ad6dSBen Warren 32871b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 32881b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 32891b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 32901b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 32911b3e3c4fSYork Sun header files or board specific files. 32921b3e3c4fSYork Sun 32936f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 32946f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 32956f5e1dc5SYork Sun 32966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3297218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3298218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 32992ad6b513STimur Tabi 3300c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3301c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3302c26e454dSwdenk 3303c26e454dSwdenk- CONFIG_FEC[12]_PHY 3304c26e454dSwdenk Define to the hardcoded PHY address which corresponds 33056e592385Swdenk to the given FEC; i. e. 3306c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3307c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3308c26e454dSwdenk 3309c26e454dSwdenk When set to -1, means to probe for first available. 3310c26e454dSwdenk 3311c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3312c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3313c26e454dSwdenk (so program the FEC to ignore it). 3314c26e454dSwdenk 3315c26e454dSwdenk- CONFIG_RMII 3316c26e454dSwdenk Enable RMII mode for all FECs. 3317c26e454dSwdenk Note that this is a global option, we can't 3318c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3319c26e454dSwdenk 33205cf91d6bSwdenk- CONFIG_CRC32_VERIFY 33215cf91d6bSwdenk Add a verify option to the crc32 command. 33225cf91d6bSwdenk The syntax is: 33235cf91d6bSwdenk 33245cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 33255cf91d6bSwdenk 33265cf91d6bSwdenk Where address/count indicate a memory area 33275cf91d6bSwdenk and crc32 is the correct crc32 which the 33285cf91d6bSwdenk area should have. 33295cf91d6bSwdenk 333056523f12Swdenk- CONFIG_LOOPW 333156523f12Swdenk Add the "loopw" memory command. This only takes effect if 3332602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 333356523f12Swdenk 33347b466641Sstroese- CONFIG_MX_CYCLIC 33357b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 33367b466641Sstroese "md/mw" commands. 33377b466641Sstroese Examples: 33387b466641Sstroese 33397b466641Sstroese => mdc.b 10 4 500 33407b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 33417b466641Sstroese 33427b466641Sstroese => mwc.l 100 12345678 10 33437b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 33447b466641Sstroese 33457b466641Sstroese This only takes effect if the memory commands are activated 3346602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 33477b466641Sstroese 33488aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3349afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3350e03f3169SWolfgang Denk low level initializations (like setting up the memory 3351e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3352e03f3169SWolfgang Denk relocate itself into RAM. 33538aa1a2d1Swdenk 3354e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3355e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3356e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3357e03f3169SWolfgang Denk these initializations itself. 33588aa1a2d1Swdenk 3359401bb30bSAneesh V- CONFIG_SPL_BUILD 3360df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3361df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3362df81238bSMagnus Lilja compiling a NAND SPL. 3363400558b5Swdenk 336468bb8295SHeiko Schocher- CONFIG_SYS_NAND_HW_ECC_OOBFIRST 336568bb8295SHeiko Schocher define this, if you want to read first the oob data 336668bb8295SHeiko Schocher and then the data. This is used for example on 336768bb8295SHeiko Schocher davinci plattforms. 336868bb8295SHeiko Schocher 3369d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3370d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3371d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3372d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3373d8834a13SMatthias Weisser conditions but may increase the binary size. 3374d8834a13SMatthias Weisser 3375f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3376f2717b47STimur Tabi----------------------------------- 3377f2717b47STimur Tabi 3378f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3379f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3380f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3381f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3382f2717b47STimur Tabiwithin that device. 3383f2717b47STimur Tabi 3384f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3385f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3386f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3387f2717b47STimur Tabi is also specified. 3388f2717b47STimur Tabi 3389f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3390f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3391f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3392f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3393f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3394f2717b47STimur Tabi 3395f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3396f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3397f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3398f2717b47STimur Tabi virtual address in NOR flash. 3399f2717b47STimur Tabi 3400f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3401f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3402f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3403f2717b47STimur Tabi 3404f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3405f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3406f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3407f2717b47STimur Tabi 3408f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3409f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3410f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3411f2717b47STimur Tabi 3412f2717b47STimur Tabi 3413c609719bSwdenkBuilding the Software: 3414c609719bSwdenk====================== 3415c609719bSwdenk 3416218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3417218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3418218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3419218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3420218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3421218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3422c609719bSwdenk 3423218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3424218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3425218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3426218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3427218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3428c609719bSwdenk 3429218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3430218ca724SWolfgang Denk $ export CROSS_COMPILE 3431c609719bSwdenk 34322f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 34332f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 34342f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 34352f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 34362f8d396bSPeter Tyser 34372f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 34382f8d396bSPeter Tyser 34392f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 34402f8d396bSPeter Tyser be executed on computers running Windows. 34412f8d396bSPeter Tyser 3442c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3443c609719bSwdenksources you must configure U-Boot for one specific board type. This 3444c609719bSwdenkis done by typing: 3445c609719bSwdenk 3446c609719bSwdenk make NAME_config 3447c609719bSwdenk 3448218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 3449218ca724SWolfgang Denkrations; see the main Makefile for supported names. 345054387ac9Swdenk 3451c609719bSwdenkNote: for some board special configuration names may exist; check if 3452c609719bSwdenk additional information is available from the board vendor; for 34532729af9dSwdenk instance, the TQM823L systems are available without (standard) 34542729af9dSwdenk or with LCD support. You can select such additional "features" 345511ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3456c609719bSwdenk 34572729af9dSwdenk make TQM823L_config 34582729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3459c609719bSwdenk 3460c609719bSwdenk make TQM823L_LCD_config 3461c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3462c609719bSwdenk 3463c609719bSwdenk etc. 3464c609719bSwdenk 3465c609719bSwdenk 3466c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 34677152b1d0Swdenkimages ready for download to / installation on your system: 3468c609719bSwdenk 3469c609719bSwdenk- "u-boot.bin" is a raw binary image 3470c609719bSwdenk- "u-boot" is an image in ELF binary format 3471c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3472c609719bSwdenk 3473baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3474baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3475baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3476baf31249SMarian Balakowicz 3477baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3478baf31249SMarian Balakowicz 3479baf31249SMarian Balakowicz make O=/tmp/build distclean 3480baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3481baf31249SMarian Balakowicz make O=/tmp/build all 3482baf31249SMarian Balakowicz 3483baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3484baf31249SMarian Balakowicz 3485baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3486baf31249SMarian Balakowicz make distclean 3487baf31249SMarian Balakowicz make NAME_config 3488baf31249SMarian Balakowicz make all 3489baf31249SMarian Balakowicz 3490baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3491baf31249SMarian Balakowiczvariable. 3492baf31249SMarian Balakowicz 3493c609719bSwdenk 3494c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3495c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3496c609719bSwdenknative "make". 3497c609719bSwdenk 3498c609719bSwdenk 3499c609719bSwdenkIf the system board that you have is not listed, then you will need 3500c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3501c609719bSwdenksteps: 3502c609719bSwdenk 3503c609719bSwdenk1. Add a new configuration option for your board to the toplevel 350485ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 350585ec0bccSwdenk entries as examples. Note that here and at many other places 35067152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 350785ec0bccSwdenk keep this order. 3508c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 350985ec0bccSwdenk files you need. In your board directory, you will need at least 351085ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 351185ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 351285ec0bccSwdenk your board 3513c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3514c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 351585ec0bccSwdenk4. Run "make <board>_config" with your new name. 3516c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3517c609719bSwdenk to be installed on your target system. 351885ec0bccSwdenk6. Debug and solve any problems that might arise. 3519c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3520c609719bSwdenk 3521c609719bSwdenk 3522c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3523c609719bSwdenk============================================================== 3524c609719bSwdenk 3525c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3526c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3527c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3528c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3529218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3530c609719bSwdenk 3531c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3532c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3533c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3534c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3535c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 35367152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3537218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3538218ca724SWolfgang Denkyou can type 3539c609719bSwdenk 3540c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3541c609719bSwdenk 3542c609719bSwdenkor to build on a native PowerPC system you can type 3543c609719bSwdenk 3544c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3545c609719bSwdenk 3546218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3547218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3548218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3549218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3550218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3551218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3552218ca724SWolfgang Denkvariable. For example: 3553baf31249SMarian Balakowicz 3554baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3555baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3556baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3557baf31249SMarian Balakowicz 3558218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3559218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3560218ca724SWolfgang Denkduring the whole build process. 3561baf31249SMarian Balakowicz 3562baf31249SMarian Balakowicz 3563c609719bSwdenkSee also "U-Boot Porting Guide" below. 3564c609719bSwdenk 3565c609719bSwdenk 3566c609719bSwdenkMonitor Commands - Overview: 3567c609719bSwdenk============================ 3568c609719bSwdenk 3569c609719bSwdenkgo - start application at address 'addr' 3570c609719bSwdenkrun - run commands in an environment variable 3571c609719bSwdenkbootm - boot application image from memory 3572c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3573c609719bSwdenktftpboot- boot image via network using TFTP protocol 3574c609719bSwdenk and env variables "ipaddr" and "serverip" 3575c609719bSwdenk (and eventually "gatewayip") 35761fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3577c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3578c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3579c609719bSwdenkloads - load S-Record file over serial line 3580c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3581c609719bSwdenkmd - memory display 3582c609719bSwdenkmm - memory modify (auto-incrementing) 3583c609719bSwdenknm - memory modify (constant address) 3584c609719bSwdenkmw - memory write (fill) 3585c609719bSwdenkcp - memory copy 3586c609719bSwdenkcmp - memory compare 3587c609719bSwdenkcrc32 - checksum calculation 35880f89c54bSPeter Tyseri2c - I2C sub-system 3589c609719bSwdenksspi - SPI utility commands 3590c609719bSwdenkbase - print or set address offset 3591c609719bSwdenkprintenv- print environment variables 3592c609719bSwdenksetenv - set environment variables 3593c609719bSwdenksaveenv - save environment variables to persistent storage 3594c609719bSwdenkprotect - enable or disable FLASH write protection 3595c609719bSwdenkerase - erase FLASH memory 3596c609719bSwdenkflinfo - print FLASH memory information 3597c609719bSwdenkbdinfo - print Board Info structure 3598c609719bSwdenkiminfo - print header information for application image 3599c609719bSwdenkconinfo - print console devices and informations 3600c609719bSwdenkide - IDE sub-system 3601c609719bSwdenkloop - infinite loop on address range 360256523f12Swdenkloopw - infinite write loop on address range 3603c609719bSwdenkmtest - simple RAM test 3604c609719bSwdenkicache - enable or disable instruction cache 3605c609719bSwdenkdcache - enable or disable data cache 3606c609719bSwdenkreset - Perform RESET of the CPU 3607c609719bSwdenkecho - echo args to console 3608c609719bSwdenkversion - print monitor version 3609c609719bSwdenkhelp - print online help 3610c609719bSwdenk? - alias for 'help' 3611c609719bSwdenk 3612c609719bSwdenk 3613c609719bSwdenkMonitor Commands - Detailed Description: 3614c609719bSwdenk======================================== 3615c609719bSwdenk 3616c609719bSwdenkTODO. 3617c609719bSwdenk 3618c609719bSwdenkFor now: just type "help <command>". 3619c609719bSwdenk 3620c609719bSwdenk 3621c609719bSwdenkEnvironment Variables: 3622c609719bSwdenk====================== 3623c609719bSwdenk 3624c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3625c609719bSwdenkcan be made persistent by saving to Flash memory. 3626c609719bSwdenk 3627c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3628c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3629c609719bSwdenkwithout a value can be used to delete a variable from the 3630c609719bSwdenkenvironment. As long as you don't save the environment you are 3631c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3632c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3633c609719bSwdenk 3634c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3635c96f86eeSWolfgang Denk 3636c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3637c609719bSwdenk 3638c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3639c609719bSwdenk 3640c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3641c609719bSwdenk 3642c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3643c609719bSwdenk 3644c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3645c609719bSwdenk 3646c609719bSwdenk bootfile - Name of the image to load with TFTP 3647c609719bSwdenk 36487d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 36497d721e34SBartlomiej Sieka command can be restricted. This variable is given as 36507d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 36517d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 36527d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 36537d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3654c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3655c3624e6eSGrant Likely bootm_mapsize. 3656c3624e6eSGrant Likely 3657c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3658c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3659c3624e6eSGrant Likely defines the size of the memory region starting at base 3660c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3661c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3662c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3663c3624e6eSGrant Likely used otherwise. 36647d721e34SBartlomiej Sieka 36657d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 36667d721e34SBartlomiej Sieka command can be restricted. This variable is given as 36677d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 36687d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 36697d721e34SBartlomiej Sieka environment variable. 36707d721e34SBartlomiej Sieka 36714bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 36724bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 36734bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 36744bae9090SBartlomiej Sieka 3675c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3676c609719bSwdenk "bootp" will just load perform a lookup of the 3677c609719bSwdenk configuration from the BOOTP server, but not try to 3678c609719bSwdenk load any image using TFTP 3679c609719bSwdenk 3680c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3681c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3682c609719bSwdenk be automatically started (by internally calling 3683c609719bSwdenk "bootm") 3684c609719bSwdenk 36854a6fd34bSwdenk If set to "no", a standalone image passed to the 36864a6fd34bSwdenk "bootm" command will be copied to the load address 36874a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 36884a6fd34bSwdenk This can be used to load and uncompress arbitrary 36894a6fd34bSwdenk data. 36904a6fd34bSwdenk 3691a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3692a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3693fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3694fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3695fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3696fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3697fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3698fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3699fa34f6b2SShawn Guo access it during the boot procedure. 3700fa34f6b2SShawn Guo 3701a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3702a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3703a28afca5SDavid A. Long to work it must reside in writable memory, have 3704a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3705a28afca5SDavid A. Long add the information it needs into it, and the memory 3706a28afca5SDavid A. Long must be accessible by the kernel. 3707a28afca5SDavid A. Long 3708eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3709eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3710eea63e05SSimon Glass defined. 3711eea63e05SSimon Glass 371217ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 371317ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 371417ea1177Swdenk mode (400kHZ). This environment variable is used in 371517ea1177Swdenk initialization code. So, for changes to be effective 371617ea1177Swdenk it must be saved and board must be reset. 371717ea1177Swdenk 3718c609719bSwdenk initrd_high - restrict positioning of initrd images: 3719c609719bSwdenk If this variable is not set, initrd images will be 3720c609719bSwdenk copied to the highest possible address in RAM; this 3721c609719bSwdenk is usually what you want since it allows for 3722c609719bSwdenk maximum initrd size. If for some reason you want to 3723c609719bSwdenk make sure that the initrd image is loaded below the 37246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3725c609719bSwdenk variable to a value of "no" or "off" or "0". 3726c609719bSwdenk Alternatively, you can set it to a maximum upper 3727c609719bSwdenk address to use (U-Boot will still check that it 3728c609719bSwdenk does not overwrite the U-Boot stack and data). 3729c609719bSwdenk 3730c609719bSwdenk For instance, when you have a system with 16 MB 37317152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3732c609719bSwdenk you can do this by adding "mem=12M" to the value of 3733c609719bSwdenk the "bootargs" variable. However, now you must make 37347152b1d0Swdenk sure that the initrd image is placed in the first 3735c609719bSwdenk 12 MB as well - this can be done with 3736c609719bSwdenk 3737c609719bSwdenk setenv initrd_high 00c00000 3738c609719bSwdenk 373938b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 374038b99261Swdenk indication to U-Boot that all addresses are legal 374138b99261Swdenk for the Linux kernel, including addresses in flash 374238b99261Swdenk memory. In this case U-Boot will NOT COPY the 374338b99261Swdenk ramdisk at all. This may be useful to reduce the 374438b99261Swdenk boot time on your system, but requires that this 374538b99261Swdenk feature is supported by your Linux kernel. 374638b99261Swdenk 3747c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3748c609719bSwdenk 3749c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3750dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3751c609719bSwdenk 3752c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3753c609719bSwdenk 3754c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3755c609719bSwdenk 3756c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3757c609719bSwdenk 3758c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3759c609719bSwdenk 3760c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3761c609719bSwdenk 3762e2a53458SMike Frysinger ethprime - controls which interface is used first. 3763a3d991bdSwdenk 3764e2a53458SMike Frysinger ethact - controls which interface is currently active. 3765e2a53458SMike Frysinger For example you can do the following 3766a3d991bdSwdenk 376748690d80SHeiko Schocher => setenv ethact FEC 376848690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 376948690d80SHeiko Schocher => setenv ethact SCC 377048690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3771a3d991bdSwdenk 3772e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3773e1692577SMatthias Fuchs available network interfaces. 3774e1692577SMatthias Fuchs It just stays at the currently selected interface. 3775e1692577SMatthias Fuchs 3776a3d991bdSwdenk netretry - When set to "no" each network operation will 3777a3d991bdSwdenk either succeed or fail without retrying. 37786e592385Swdenk When set to "once" the network operation will 37796e592385Swdenk fail when all the available network interfaces 37806e592385Swdenk are tried once without success. 3781a3d991bdSwdenk Useful on scripts which control the retry operation 3782a3d991bdSwdenk themselves. 3783a3d991bdSwdenk 3784b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3785a1cf027aSJean-Christophe PLAGNIOL-VILLARD 378628cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3787ecb0ccd9SWolfgang Denk UDP source port. 3788ecb0ccd9SWolfgang Denk 378928cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 379028cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 379128cb9375SWolfgang Denk 3792c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3793c96f86eeSWolfgang Denk we use the TFTP server's default block size 3794c96f86eeSWolfgang Denk 3795c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3796c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3797c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3798c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3799c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3800c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3801c96f86eeSWolfgang Denk with unreliable TFTP servers. 3802c96f86eeSWolfgang Denk 3803a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 380411ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3805a3d991bdSwdenk VLAN tagged frames. 3806c609719bSwdenk 3807dc0b7b0eSJason HobbsThe following image location variables contain the location of images 3808dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 3809dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 3810dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 3811dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 3812dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 3813dc0b7b0eSJason Hobbsflash or offset in NAND flash. 3814dc0b7b0eSJason Hobbs 3815dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 3816dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 3817dc0b7b0eSJason Hobbsboards use these variables for other purposes. 3818dc0b7b0eSJason Hobbs 3819dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 3820dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 3821dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 3822dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 3823dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 3824dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 3825dc0b7b0eSJason Hobbs 3826c609719bSwdenkThe following environment variables may be used and automatically 3827c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3828c609719bSwdenkdepending the information provided by your boot server: 3829c609719bSwdenk 3830c609719bSwdenk bootfile - see above 3831c609719bSwdenk dnsip - IP address of your Domain Name Server 3832fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3833c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3834c609719bSwdenk hostname - Target hostname 3835c609719bSwdenk ipaddr - see above 3836c609719bSwdenk netmask - Subnet Mask 3837c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3838c609719bSwdenk serverip - see above 3839c609719bSwdenk 3840c609719bSwdenk 3841c609719bSwdenkThere are two special Environment Variables: 3842c609719bSwdenk 3843c609719bSwdenk serial# - contains hardware identification information such 3844c609719bSwdenk as type string and/or serial number 3845c609719bSwdenk ethaddr - Ethernet address 3846c609719bSwdenk 3847c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3848c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3849c609719bSwdenkonce they have been set once. 3850c609719bSwdenk 3851c609719bSwdenk 3852c1551ea8SstroeseFurther special Environment Variables: 3853c1551ea8Sstroese 3854c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3855c1551ea8Sstroese with the "version" command. This variable is 3856c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3857c1551ea8Sstroese 3858c1551ea8Sstroese 3859c609719bSwdenkPlease note that changes to some configuration parameters may take 3860c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3861c609719bSwdenk 3862c609719bSwdenk 3863f07771ccSwdenkCommand Line Parsing: 3864f07771ccSwdenk===================== 3865f07771ccSwdenk 3866f07771ccSwdenkThere are two different command line parsers available with U-Boot: 38677152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3868f07771ccSwdenk 3869f07771ccSwdenkOld, simple command line parser: 3870f07771ccSwdenk-------------------------------- 3871f07771ccSwdenk 3872f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3873f07771ccSwdenk- several commands on one line, separated by ';' 3874fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3875f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3876f07771ccSwdenk for example: 3877fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3878f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3879f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3880f07771ccSwdenk 3881f07771ccSwdenkHush shell: 3882f07771ccSwdenk----------- 3883f07771ccSwdenk 3884f07771ccSwdenk- similar to Bourne shell, with control structures like 3885f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3886f07771ccSwdenk until...do...done, ... 3887f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3888f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3889f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3890f07771ccSwdenk command 3891f07771ccSwdenk 3892f07771ccSwdenkGeneral rules: 3893f07771ccSwdenk-------------- 3894f07771ccSwdenk 3895f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3896f07771ccSwdenk command) contains several commands separated by semicolon, and 3897f07771ccSwdenk one of these commands fails, then the remaining commands will be 3898f07771ccSwdenk executed anyway. 3899f07771ccSwdenk 3900f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 390111ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3902f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3903f07771ccSwdenk variables are not executed. 3904f07771ccSwdenk 3905c609719bSwdenkNote for Redundant Ethernet Interfaces: 3906c609719bSwdenk======================================= 3907c609719bSwdenk 390811ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3909c609719bSwdenksuch configurations and is capable of automatic selection of a 39107152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3911c609719bSwdenk 3912c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3913c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3914c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3915c609719bSwdenk 3916c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3917c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3918c609719bSwdenkding setting in the environment; if the corresponding environment 3919c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3920c609719bSwdenk 3921c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3922c609719bSwdenk environment, the SROM's address is used. 3923c609719bSwdenk 3924c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3925c609719bSwdenk environment exists, then the value from the environment variable is 3926c609719bSwdenk used. 3927c609719bSwdenk 3928c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3929c609719bSwdenk both addresses are the same, this MAC address is used. 3930c609719bSwdenk 3931c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3932c609719bSwdenk addresses differ, the value from the environment is used and a 3933c609719bSwdenk warning is printed. 3934c609719bSwdenk 3935c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3936c609719bSwdenk is raised. 3937c609719bSwdenk 3938ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 3939ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 3940ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 3941ecee9324SBen WarrenThe naming convention is as follows: 3942ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 3943c609719bSwdenk 3944c609719bSwdenkImage Formats: 3945c609719bSwdenk============== 3946c609719bSwdenk 39473310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 39483310c549SMarian Balakowiczimages in two formats: 39493310c549SMarian Balakowicz 39503310c549SMarian BalakowiczNew uImage format (FIT) 39513310c549SMarian Balakowicz----------------------- 39523310c549SMarian Balakowicz 39533310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 39543310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 39553310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 39563310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 39573310c549SMarian Balakowicz 39583310c549SMarian Balakowicz 39593310c549SMarian BalakowiczOld uImage format 39603310c549SMarian Balakowicz----------------- 39613310c549SMarian Balakowicz 39623310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 39633310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 39643310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3965c609719bSwdenk 3966c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3967c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3968f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3969f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3970f5ed9e39SPeter Tyser INTEGRITY). 39717b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 3972afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 3973afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 3974c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3975c609719bSwdenk* Load Address 3976c609719bSwdenk* Entry Point 3977c609719bSwdenk* Image Name 3978c609719bSwdenk* Image Timestamp 3979c609719bSwdenk 3980c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3981c609719bSwdenkand the data portions of the image are secured against corruption by 3982c609719bSwdenkCRC32 checksums. 3983c609719bSwdenk 3984c609719bSwdenk 3985c609719bSwdenkLinux Support: 3986c609719bSwdenk============== 3987c609719bSwdenk 3988c609719bSwdenkAlthough U-Boot should support any OS or standalone application 39897152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3990c609719bSwdenkU-Boot. 3991c609719bSwdenk 3992c609719bSwdenkU-Boot includes many features that so far have been part of some 3993c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3994c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3995c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 39967152b1d0Swdenkserves several purposes: 3997c609719bSwdenk 3998c609719bSwdenk- the same features can be used for other OS or standalone 3999c609719bSwdenk applications (for instance: using compressed images to reduce the 4000c609719bSwdenk Flash memory footprint) 4001c609719bSwdenk 4002c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 40037152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4004c609719bSwdenk 4005c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4006c609719bSwdenk images; of course this also means that different kernel images can 4007c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4008c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4009c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4010c609719bSwdenk software is easier now. 4011c609719bSwdenk 4012c609719bSwdenk 4013c609719bSwdenkLinux HOWTO: 4014c609719bSwdenk============ 4015c609719bSwdenk 4016c609719bSwdenkPorting Linux to U-Boot based systems: 4017c609719bSwdenk--------------------------------------- 4018c609719bSwdenk 4019c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4020c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4021c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4022c609719bSwdenkLinux :-). 4023c609719bSwdenk 4024a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4025c609719bSwdenk 4026c609719bSwdenkJust make sure your machine specific header file (for instance 4027c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 40281dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 40291dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 40306d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4031c609719bSwdenk 4032c609719bSwdenk 4033c609719bSwdenkConfiguring the Linux kernel: 4034c609719bSwdenk----------------------------- 4035c609719bSwdenk 4036c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4037c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4038c609719bSwdenk 4039c609719bSwdenk 4040c609719bSwdenkBuilding a Linux Image: 4041c609719bSwdenk----------------------- 4042c609719bSwdenk 404324ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 404424ee89b9Swdenknot used. If you use recent kernel source, a new build target 404524ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 404624ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 404724ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 404824ee89b9Swdenk100% compatible format. 4049c609719bSwdenk 4050c609719bSwdenkExample: 4051c609719bSwdenk 4052c609719bSwdenk make TQM850L_config 4053c609719bSwdenk make oldconfig 4054c609719bSwdenk make dep 405524ee89b9Swdenk make uImage 4056c609719bSwdenk 405724ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 405824ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 405924ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4060c609719bSwdenk 406124ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 406224ee89b9Swdenk 406324ee89b9Swdenk* convert the kernel into a raw binary image: 406424ee89b9Swdenk 406524ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 406624ee89b9Swdenk -R .note -R .comment \ 406724ee89b9Swdenk -S vmlinux linux.bin 406824ee89b9Swdenk 406924ee89b9Swdenk* compress the binary image: 407024ee89b9Swdenk 407124ee89b9Swdenk gzip -9 linux.bin 407224ee89b9Swdenk 407324ee89b9Swdenk* package compressed binary image for U-Boot: 407424ee89b9Swdenk 407524ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 407624ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 407724ee89b9Swdenk -d linux.bin.gz uImage 407824ee89b9Swdenk 407924ee89b9Swdenk 408024ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 408124ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 408224ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 408324ee89b9Swdenkbyte header containing information about target architecture, 408424ee89b9Swdenkoperating system, image type, compression method, entry points, time 408524ee89b9Swdenkstamp, CRC32 checksums, etc. 408624ee89b9Swdenk 408724ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 408824ee89b9Swdenkprint the header information, or to build new images. 4089c609719bSwdenk 4090c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4091c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4092c609719bSwdenkchecksum verification: 4093c609719bSwdenk 4094c609719bSwdenk tools/mkimage -l image 4095c609719bSwdenk -l ==> list image header information 4096c609719bSwdenk 4097c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4098c609719bSwdenkfrom a "data file" which is used as image payload: 4099c609719bSwdenk 4100c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4101c609719bSwdenk -n name -d data_file image 4102c609719bSwdenk -A ==> set architecture to 'arch' 4103c609719bSwdenk -O ==> set operating system to 'os' 4104c609719bSwdenk -T ==> set image type to 'type' 4105c609719bSwdenk -C ==> set compression type 'comp' 4106c609719bSwdenk -a ==> set load address to 'addr' (hex) 4107c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4108c609719bSwdenk -n ==> set image name to 'name' 4109c609719bSwdenk -d ==> use image data from 'datafile' 4110c609719bSwdenk 411169459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 411269459791Swdenkaddress (0x00000000), but the entry point address depends on the 411369459791Swdenkkernel version: 4114c609719bSwdenk 4115c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 411624ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4117c609719bSwdenk 4118c609719bSwdenkSo a typical call to build a U-Boot image would read: 4119c609719bSwdenk 412024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 412124ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4122a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 412324ee89b9Swdenk > examples/uImage.TQM850L 412424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4125c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4126c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4127c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4128c609719bSwdenk Load Address: 0x00000000 412924ee89b9Swdenk Entry Point: 0x00000000 4130c609719bSwdenk 4131c609719bSwdenkTo verify the contents of the image (or check for corruption): 4132c609719bSwdenk 413324ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 413424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4135c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4136c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4137c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4138c609719bSwdenk Load Address: 0x00000000 413924ee89b9Swdenk Entry Point: 0x00000000 4140c609719bSwdenk 4141c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4142c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4143c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4144c609719bSwdenkneed to be uncompressed: 4145c609719bSwdenk 4146a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 414724ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 414824ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4149a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 415024ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 415124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4152c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4153c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4154c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4155c609719bSwdenk Load Address: 0x00000000 415624ee89b9Swdenk Entry Point: 0x00000000 4157c609719bSwdenk 4158c609719bSwdenk 4159c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4160c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4161c609719bSwdenk 4162c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4163c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4164c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4165c609719bSwdenk Image Name: Simple Ramdisk Image 4166c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4167c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4168c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4169c609719bSwdenk Load Address: 0x00000000 4170c609719bSwdenk Entry Point: 0x00000000 4171c609719bSwdenk 4172c609719bSwdenk 4173c609719bSwdenkInstalling a Linux Image: 4174c609719bSwdenk------------------------- 4175c609719bSwdenk 4176c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4177c609719bSwdenkyou must convert the image to S-Record format: 4178c609719bSwdenk 4179c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4180c609719bSwdenk 4181c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4182c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4183c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4184c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4185c609719bSwdenkcommand. 4186c609719bSwdenk 4187c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4188c609719bSwdenkTQM8xxL is in the first Flash bank): 4189c609719bSwdenk 4190c609719bSwdenk => erase 40100000 401FFFFF 4191c609719bSwdenk 4192c609719bSwdenk .......... done 4193c609719bSwdenk Erased 8 sectors 4194c609719bSwdenk 4195c609719bSwdenk => loads 40100000 4196c609719bSwdenk ## Ready for S-Record download ... 4197c609719bSwdenk ~>examples/image.srec 4198c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4199c609719bSwdenk ... 4200c609719bSwdenk 15989 15990 15991 15992 4201c609719bSwdenk [file transfer complete] 4202c609719bSwdenk [connected] 4203c609719bSwdenk ## Start Addr = 0x00000000 4204c609719bSwdenk 4205c609719bSwdenk 4206c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4207c609719bSwdenkthis includes a checksum verification so you can be sure no data 4208c609719bSwdenkcorruption happened: 4209c609719bSwdenk 4210c609719bSwdenk => imi 40100000 4211c609719bSwdenk 4212c609719bSwdenk ## Checking Image at 40100000 ... 4213c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4214c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4215c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4216c609719bSwdenk Load Address: 00000000 4217c609719bSwdenk Entry Point: 0000000c 4218c609719bSwdenk Verifying Checksum ... OK 4219c609719bSwdenk 4220c609719bSwdenk 4221c609719bSwdenkBoot Linux: 4222c609719bSwdenk----------- 4223c609719bSwdenk 4224c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4225c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4226c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4227c609719bSwdenkparameters. You can check and modify this variable using the 4228c609719bSwdenk"printenv" and "setenv" commands: 4229c609719bSwdenk 4230c609719bSwdenk 4231c609719bSwdenk => printenv bootargs 4232c609719bSwdenk bootargs=root=/dev/ram 4233c609719bSwdenk 4234c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4235c609719bSwdenk 4236c609719bSwdenk => printenv bootargs 4237c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4238c609719bSwdenk 4239c609719bSwdenk => bootm 40020000 4240c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4241c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4242c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4243c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4244c609719bSwdenk Load Address: 00000000 4245c609719bSwdenk Entry Point: 0000000c 4246c609719bSwdenk Verifying Checksum ... OK 4247c609719bSwdenk Uncompressing Kernel Image ... OK 4248c609719bSwdenk 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 4249c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4250c609719bSwdenk time_init: decrementer frequency = 187500000/60 4251c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4252c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4253c609719bSwdenk ... 4254c609719bSwdenk 425511ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 42567152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4257c609719bSwdenkformat!) to the "bootm" command: 4258c609719bSwdenk 4259c609719bSwdenk => imi 40100000 40200000 4260c609719bSwdenk 4261c609719bSwdenk ## Checking Image at 40100000 ... 4262c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4263c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4264c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4265c609719bSwdenk Load Address: 00000000 4266c609719bSwdenk Entry Point: 0000000c 4267c609719bSwdenk Verifying Checksum ... OK 4268c609719bSwdenk 4269c609719bSwdenk ## Checking Image at 40200000 ... 4270c609719bSwdenk Image Name: Simple Ramdisk Image 4271c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4272c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4273c609719bSwdenk Load Address: 00000000 4274c609719bSwdenk Entry Point: 00000000 4275c609719bSwdenk Verifying Checksum ... OK 4276c609719bSwdenk 4277c609719bSwdenk => bootm 40100000 40200000 4278c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4279c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4280c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4281c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4282c609719bSwdenk Load Address: 00000000 4283c609719bSwdenk Entry Point: 0000000c 4284c609719bSwdenk Verifying Checksum ... OK 4285c609719bSwdenk Uncompressing Kernel Image ... OK 4286c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4287c609719bSwdenk Image Name: Simple Ramdisk Image 4288c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4289c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4290c609719bSwdenk Load Address: 00000000 4291c609719bSwdenk Entry Point: 00000000 4292c609719bSwdenk Verifying Checksum ... OK 4293c609719bSwdenk Loading Ramdisk ... OK 4294c609719bSwdenk 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 4295c609719bSwdenk Boot arguments: root=/dev/ram 4296c609719bSwdenk time_init: decrementer frequency = 187500000/60 4297c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4298c609719bSwdenk ... 4299c609719bSwdenk RAMDISK: Compressed image found at block 0 4300c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4301c609719bSwdenk 4302c609719bSwdenk bash# 4303c609719bSwdenk 43040267768eSMatthew McClintockBoot Linux and pass a flat device tree: 43050267768eSMatthew McClintock----------- 43060267768eSMatthew McClintock 43070267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 43080267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 43090267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 43100267768eSMatthew McClintockflat device tree: 43110267768eSMatthew McClintock 43120267768eSMatthew McClintock=> print oftaddr 43130267768eSMatthew McClintockoftaddr=0x300000 43140267768eSMatthew McClintock=> print oft 43150267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 43160267768eSMatthew McClintock=> tftp $oftaddr $oft 43170267768eSMatthew McClintockSpeed: 1000, full duplex 43180267768eSMatthew McClintockUsing TSEC0 device 43190267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 43200267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 43210267768eSMatthew McClintockLoad address: 0x300000 43220267768eSMatthew McClintockLoading: # 43230267768eSMatthew McClintockdone 43240267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 43250267768eSMatthew McClintock=> tftp $loadaddr $bootfile 43260267768eSMatthew McClintockSpeed: 1000, full duplex 43270267768eSMatthew McClintockUsing TSEC0 device 43280267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 43290267768eSMatthew McClintockFilename 'uImage'. 43300267768eSMatthew McClintockLoad address: 0x200000 43310267768eSMatthew McClintockLoading:############ 43320267768eSMatthew McClintockdone 43330267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 43340267768eSMatthew McClintock=> print loadaddr 43350267768eSMatthew McClintockloadaddr=200000 43360267768eSMatthew McClintock=> print oftaddr 43370267768eSMatthew McClintockoftaddr=0x300000 43380267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 43390267768eSMatthew McClintock## Booting image at 00200000 ... 43400267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 43410267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 43420267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 43430267768eSMatthew McClintock Load Address: 00000000 43440267768eSMatthew McClintock Entry Point: 00000000 43450267768eSMatthew McClintock Verifying Checksum ... OK 43460267768eSMatthew McClintock Uncompressing Kernel Image ... OK 43470267768eSMatthew McClintockBooting using flat device tree at 0x300000 43480267768eSMatthew McClintockUsing MPC85xx ADS machine description 43490267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 43500267768eSMatthew McClintock[snip] 43510267768eSMatthew McClintock 43520267768eSMatthew McClintock 43536069ff26SwdenkMore About U-Boot Image Types: 43546069ff26Swdenk------------------------------ 43556069ff26Swdenk 43566069ff26SwdenkU-Boot supports the following image types: 43576069ff26Swdenk 43586069ff26Swdenk "Standalone Programs" are directly runnable in the environment 43596069ff26Swdenk provided by U-Boot; it is expected that (if they behave 43606069ff26Swdenk well) you can continue to work in U-Boot after return from 43616069ff26Swdenk the Standalone Program. 43626069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 43636069ff26Swdenk will take over control completely. Usually these programs 43646069ff26Swdenk will install their own set of exception handlers, device 43656069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 43666069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 43676069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 43686069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 43696069ff26Swdenk being started. 43706069ff26Swdenk "Multi-File Images" contain several images, typically an OS 43716069ff26Swdenk (Linux) kernel image and one or more data images like 43726069ff26Swdenk RAMDisks. This construct is useful for instance when you want 43736069ff26Swdenk to boot over the network using BOOTP etc., where the boot 43746069ff26Swdenk server provides just a single image file, but you want to get 43756069ff26Swdenk for instance an OS kernel and a RAMDisk image. 43766069ff26Swdenk 43776069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 43786069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 43796069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 43806069ff26Swdenk Immediately after the terminating 0 follow the images, one by 43816069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 43826069ff26Swdenk a multiple of 4 bytes). 43836069ff26Swdenk 43846069ff26Swdenk "Firmware Images" are binary images containing firmware (like 43856069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 43866069ff26Swdenk flash memory. 43876069ff26Swdenk 43886069ff26Swdenk "Script files" are command sequences that will be executed by 43896069ff26Swdenk U-Boot's command interpreter; this feature is especially 43906069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 43916069ff26Swdenk as command interpreter. 43926069ff26Swdenk 4393c609719bSwdenk 4394c609719bSwdenkStandalone HOWTO: 4395c609719bSwdenk================= 4396c609719bSwdenk 4397c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4398c609719bSwdenkrun "standalone" applications, which can use some resources of 4399c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4400c609719bSwdenk 4401c609719bSwdenkTwo simple examples are included with the sources: 4402c609719bSwdenk 4403c609719bSwdenk"Hello World" Demo: 4404c609719bSwdenk------------------- 4405c609719bSwdenk 4406c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4407c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4408c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4409c609719bSwdenklike that: 4410c609719bSwdenk 4411c609719bSwdenk => loads 4412c609719bSwdenk ## Ready for S-Record download ... 4413c609719bSwdenk ~>examples/hello_world.srec 4414c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4415c609719bSwdenk [file transfer complete] 4416c609719bSwdenk [connected] 4417c609719bSwdenk ## Start Addr = 0x00040004 4418c609719bSwdenk 4419c609719bSwdenk => go 40004 Hello World! This is a test. 4420c609719bSwdenk ## Starting application at 0x00040004 ... 4421c609719bSwdenk Hello World 4422c609719bSwdenk argc = 7 4423c609719bSwdenk argv[0] = "40004" 4424c609719bSwdenk argv[1] = "Hello" 4425c609719bSwdenk argv[2] = "World!" 4426c609719bSwdenk argv[3] = "This" 4427c609719bSwdenk argv[4] = "is" 4428c609719bSwdenk argv[5] = "a" 4429c609719bSwdenk argv[6] = "test." 4430c609719bSwdenk argv[7] = "<NULL>" 4431c609719bSwdenk Hit any key to exit ... 4432c609719bSwdenk 4433c609719bSwdenk ## Application terminated, rc = 0x0 4434c609719bSwdenk 4435c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4436c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4437c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4438c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4439c609719bSwdenkcharacter, but this is just a demo program. The application can be 4440c609719bSwdenkcontrolled by the following keys: 4441c609719bSwdenk 4442c609719bSwdenk ? - print current values og the CPM Timer registers 4443c609719bSwdenk b - enable interrupts and start timer 4444c609719bSwdenk e - stop timer and disable interrupts 4445c609719bSwdenk q - quit application 4446c609719bSwdenk 4447c609719bSwdenk => loads 4448c609719bSwdenk ## Ready for S-Record download ... 4449c609719bSwdenk ~>examples/timer.srec 4450c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4451c609719bSwdenk [file transfer complete] 4452c609719bSwdenk [connected] 4453c609719bSwdenk ## Start Addr = 0x00040004 4454c609719bSwdenk 4455c609719bSwdenk => go 40004 4456c609719bSwdenk ## Starting application at 0x00040004 ... 4457c609719bSwdenk TIMERS=0xfff00980 4458c609719bSwdenk Using timer 1 4459c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4460c609719bSwdenk 4461c609719bSwdenkHit 'b': 4462c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4463c609719bSwdenk Enabling timer 4464c609719bSwdenkHit '?': 4465c609719bSwdenk [q, b, e, ?] ........ 4466c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4467c609719bSwdenkHit '?': 4468c609719bSwdenk [q, b, e, ?] . 4469c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4470c609719bSwdenkHit '?': 4471c609719bSwdenk [q, b, e, ?] . 4472c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4473c609719bSwdenkHit '?': 4474c609719bSwdenk [q, b, e, ?] . 4475c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4476c609719bSwdenkHit 'e': 4477c609719bSwdenk [q, b, e, ?] ...Stopping timer 4478c609719bSwdenkHit 'q': 4479c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4480c609719bSwdenk 4481c609719bSwdenk 448285ec0bccSwdenkMinicom warning: 448385ec0bccSwdenk================ 448485ec0bccSwdenk 44857152b1d0SwdenkOver time, many people have reported problems when trying to use the 448685ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 448785ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4488f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 448985ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 449085ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 449185ec0bccSwdenk 449252f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 449352f52c14Swdenkconfiguration to your "File transfer protocols" section: 449452f52c14Swdenk 449552f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 449652f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 449752f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 449852f52c14Swdenk 449952f52c14Swdenk 4500c609719bSwdenkNetBSD Notes: 4501c609719bSwdenk============= 4502c609719bSwdenk 4503c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4504c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4505c609719bSwdenk 4506c609719bSwdenkBuilding requires a cross environment; it is known to work on 4507c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4508c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4509c609719bSwdenkNote that the cross-powerpc package does not install include files; 4510c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4511c609719bSwdenkmissing. This file has to be installed and patched manually: 4512c609719bSwdenk 4513c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4514c609719bSwdenk # mkdir powerpc 4515c609719bSwdenk # ln -s powerpc machine 4516c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4517c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4518c609719bSwdenk 4519c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4520c609719bSwdenkand U-Boot include files. 4521c609719bSwdenk 4522c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4523c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4524c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4525c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 45262a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4527c609719bSwdenk 4528c609719bSwdenk 4529c609719bSwdenkImplementation Internals: 4530c609719bSwdenk========================= 4531c609719bSwdenk 4532c609719bSwdenkThe following is not intended to be a complete description of every 4533c609719bSwdenkimplementation detail. However, it should help to understand the 4534c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4535c609719bSwdenkhardware. 4536c609719bSwdenk 4537c609719bSwdenk 4538c609719bSwdenkInitial Stack, Global Data: 4539c609719bSwdenk--------------------------- 4540c609719bSwdenk 4541c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4542c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4543c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4544c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4545c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4546c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4547c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4548c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4549c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4550c609719bSwdenklocked as (mis-) used as memory, etc. 4551c609719bSwdenk 45527152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 45530668236bSWolfgang Denk U-Boot mailing list: 455443d9616cSwdenk 455543d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 455643d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 455743d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 455843d9616cSwdenk ... 455943d9616cSwdenk 456043d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 456143d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 456243d9616cSwdenk require any physical RAM backing up the cache. The cleverness 456343d9616cSwdenk is that the cache is being used as a temporary supply of 456443d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 456511ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 456643d9616cSwdenk can see how this works by studying the cache architecture and 456743d9616cSwdenk operation in the architecture and processor-specific manuals. 456843d9616cSwdenk 456943d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 457043d9616cSwdenk is another option for the system designer to use as an 457111ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 457243d9616cSwdenk option should work for you. Using CS 4 should be fine if your 457343d9616cSwdenk board designers haven't used it for something that would 457443d9616cSwdenk cause you grief during the initial boot! It is frequently not 457543d9616cSwdenk used. 457643d9616cSwdenk 45776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 457843d9616cSwdenk with your processor/board/system design. The default value 457943d9616cSwdenk you will find in any recent u-boot distribution in 45808a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 458143d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 458243d9616cSwdenk it above 400_0000. Just make sure your board has no resources 458343d9616cSwdenk that are supposed to respond to that address! That code in 458443d9616cSwdenk start.S has been around a while and should work as is when 458543d9616cSwdenk you get the config right. 458643d9616cSwdenk 458743d9616cSwdenk -Chris Hallinan 458843d9616cSwdenk DS4.COM, Inc. 458943d9616cSwdenk 4590c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4591c609719bSwdenkcode for the initialization procedures: 4592c609719bSwdenk 4593c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4594c609719bSwdenk to write it. 4595c609719bSwdenk 459611ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4597c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 45987152b1d0Swdenk zation is performed later (when relocating to RAM). 4599c609719bSwdenk 4600c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4601c609719bSwdenk that. 4602c609719bSwdenk 4603c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4604c609719bSwdenknormal global data to share information beween the code. But it 4605c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4606c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4607c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4608c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4609c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4610c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4611c609719bSwdenkreserve for this purpose. 4612c609719bSwdenk 46137152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4614c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4615c609719bSwdenkGCC's implementation. 4616c609719bSwdenk 4617c609719bSwdenkFor PowerPC, the following registers have specific use: 4618c609719bSwdenk R1: stack pointer 4619e7670f6cSWolfgang Denk R2: reserved for system use 4620c609719bSwdenk R3-R4: parameter passing and return values 4621c609719bSwdenk R5-R10: parameter passing 4622c609719bSwdenk R13: small data area pointer 4623c609719bSwdenk R30: GOT pointer 4624c609719bSwdenk R31: frame pointer 4625c609719bSwdenk 4626e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4627e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4628e6bee808SJoakim Tjernlund going back and forth between asm and C) 4629c609719bSwdenk 4630e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4631c609719bSwdenk 4632c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4633c609719bSwdenk address of the global data structure is known at compile time), 4634c609719bSwdenk but it turned out that reserving a register results in somewhat 4635c609719bSwdenk smaller code - although the code savings are not that big (on 4636c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4637c609719bSwdenk 624 text + 127 data). 4638c609719bSwdenk 4639c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 46404c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 46414c58eb55SMike Frysinger 4642c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 46434c58eb55SMike Frysinger 4644c609719bSwdenkOn ARM, the following registers are used: 4645c609719bSwdenk 4646c609719bSwdenk R0: function argument word/integer result 4647c609719bSwdenk R1-R3: function argument word 4648c609719bSwdenk R9: GOT pointer 4649c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4650c609719bSwdenk R11: argument (frame) pointer 4651c609719bSwdenk R12: temporary workspace 4652c609719bSwdenk R13: stack pointer 4653c609719bSwdenk R14: link register 4654c609719bSwdenk R15: program counter 4655c609719bSwdenk 4656c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4657c609719bSwdenk 46580df01fd3SThomas ChouOn Nios II, the ABI is documented here: 46590df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 46600df01fd3SThomas Chou 46610df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 46620df01fd3SThomas Chou 46630df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 46640df01fd3SThomas Chou to access small data sections, so gp is free. 46650df01fd3SThomas Chou 4666afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4667afc1ce82SMacpaul Lin 4668afc1ce82SMacpaul Lin R0-R1: argument/return 4669afc1ce82SMacpaul Lin R2-R5: argument 4670afc1ce82SMacpaul Lin R15: temporary register for assembler 4671afc1ce82SMacpaul Lin R16: trampoline register 4672afc1ce82SMacpaul Lin R28: frame pointer (FP) 4673afc1ce82SMacpaul Lin R29: global pointer (GP) 4674afc1ce82SMacpaul Lin R30: link register (LP) 4675afc1ce82SMacpaul Lin R31: stack pointer (SP) 4676afc1ce82SMacpaul Lin PC: program counter (PC) 4677afc1ce82SMacpaul Lin 4678afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4679afc1ce82SMacpaul Lin 4680d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4681d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4682c609719bSwdenk 4683c609719bSwdenkMemory Management: 4684c609719bSwdenk------------------ 4685c609719bSwdenk 4686c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4687c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4688c609719bSwdenk 4689c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4690c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4691c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4692c609719bSwdenkphysical memory banks. 4693c609719bSwdenk 4694c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4695c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4696c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4697c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 46986d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4699c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4700c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4701c609719bSwdenk 4702c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4703c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4704c609719bSwdenk 4705c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4706c609719bSwdenkthis: 4707c609719bSwdenk 4708c609719bSwdenk 0x0000 0000 Exception Vector code 4709c609719bSwdenk : 4710c609719bSwdenk 0x0000 1FFF 4711c609719bSwdenk 0x0000 2000 Free for Application Use 4712c609719bSwdenk : 4713c609719bSwdenk : 4714c609719bSwdenk 4715c609719bSwdenk : 4716c609719bSwdenk : 4717c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4718c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4719c609719bSwdenk 0x00FC 0000 Malloc Arena 4720c609719bSwdenk : 4721c609719bSwdenk 0x00FD FFFF 4722c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4723c609719bSwdenk ... eventually: LCD or video framebuffer 4724c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4725c609719bSwdenk 0x00FF FFFF [End of RAM] 4726c609719bSwdenk 4727c609719bSwdenk 4728c609719bSwdenkSystem Initialization: 4729c609719bSwdenk---------------------- 4730c609719bSwdenk 4731c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 473211ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4733c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 47347152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4735c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4736c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4737c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4738c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4739c609719bSwdenkthe caches and the SIU. 4740c609719bSwdenk 4741c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4742c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4743c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4744c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4745c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4746c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4747c609719bSwdenkbanks. 4748c609719bSwdenk 4749c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 47507152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4751c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4752c609719bSwdenk0x00000000, with any additional banks following immediately to create 4753c609719bSwdenkcontiguous memory starting from 0. 4754c609719bSwdenk 4755c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4756c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4757c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4758c609719bSwdenkpages, and the final stack is set up. 4759c609719bSwdenk 4760c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4761c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4762c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4763c609719bSwdenknew address in RAM. 4764c609719bSwdenk 4765c609719bSwdenk 4766c609719bSwdenkU-Boot Porting Guide: 4767c609719bSwdenk---------------------- 4768c609719bSwdenk 4769c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 47706aff3115Swdenklist, October 2002] 4771c609719bSwdenk 4772c609719bSwdenk 4773c609719bSwdenkint main(int argc, char *argv[]) 4774c609719bSwdenk{ 4775c609719bSwdenk sighandler_t no_more_time; 4776c609719bSwdenk 4777c609719bSwdenk signal(SIGALRM, no_more_time); 4778c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4779c609719bSwdenk 4780c609719bSwdenk if (available_money > available_manpower) { 47816c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4782c609719bSwdenk return 0; 4783c609719bSwdenk } 4784c609719bSwdenk 4785c609719bSwdenk Download latest U-Boot source; 4786c609719bSwdenk 47870668236bSWolfgang Denk Subscribe to u-boot mailing list; 47886aff3115Swdenk 47896c3fef28SJerry Van Baren if (clueless) 4790c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4791c609719bSwdenk 4792c609719bSwdenk while (learning) { 4793c609719bSwdenk Read the README file in the top level directory; 47947cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 47956c3fef28SJerry Van Baren Read applicable doc/*.README; 4796c609719bSwdenk Read the source, Luke; 47976c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4798c609719bSwdenk } 4799c609719bSwdenk 48006c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 48016c3fef28SJerry Van Baren Buy a BDI3000; 48026c3fef28SJerry Van Baren else 4803c609719bSwdenk Add a lot of aggravation and time; 4804c609719bSwdenk 48056c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 48066c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 48076c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 48086c3fef28SJerry Van Baren } else { 4809c609719bSwdenk Create your own board support subdirectory; 48106c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 48116c3fef28SJerry Van Baren } 48126c3fef28SJerry Van Baren Edit new board/<myboard> files 48136c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4814c609719bSwdenk 48156c3fef28SJerry Van Baren while (!accepted) { 4816c609719bSwdenk while (!running) { 4817c609719bSwdenk do { 4818c609719bSwdenk Add / modify source code; 4819c609719bSwdenk } until (compiles); 4820c609719bSwdenk Debug; 4821c609719bSwdenk if (clueless) 4822c609719bSwdenk email("Hi, I am having problems..."); 4823c609719bSwdenk } 48246c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 48256c3fef28SJerry Van Baren if (reasonable critiques) 48266c3fef28SJerry Van Baren Incorporate improvements from email list code review; 48276c3fef28SJerry Van Baren else 48286c3fef28SJerry Van Baren Defend code as written; 48296c3fef28SJerry Van Baren } 4830c609719bSwdenk 4831c609719bSwdenk return 0; 4832c609719bSwdenk} 4833c609719bSwdenk 4834c609719bSwdenkvoid no_more_time (int sig) 4835c609719bSwdenk{ 4836c609719bSwdenk hire_a_guru(); 4837c609719bSwdenk} 4838c609719bSwdenk 4839c609719bSwdenk 4840c609719bSwdenkCoding Standards: 4841c609719bSwdenk----------------- 4842c609719bSwdenk 4843c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 48442c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 48457ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 4846c609719bSwdenk 48472c051651SDetlev ZundelSource files originating from a different project (for example the 48482c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 48492c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 48502c051651SDetlev Zundelsources. 48512c051651SDetlev Zundel 48522c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 48532c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 48542c051651SDetlev Zundelin your code. 4855c609719bSwdenk 4856c178d3daSwdenkPlease also stick to the following formatting rules: 4857180d3f74Swdenk- remove any trailing white space 48587ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 4859180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 48607ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 4861180d3f74Swdenk- do not add trailing empty lines to source files 4862180d3f74Swdenk 4863c609719bSwdenkSubmissions which do not conform to the standards may be returned 4864c609719bSwdenkwith a request to reformat the changes. 4865c609719bSwdenk 4866c609719bSwdenk 4867c609719bSwdenkSubmitting Patches: 4868c609719bSwdenk------------------- 4869c609719bSwdenk 4870c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4871c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4872c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4873c609719bSwdenk 48740d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4875218ca724SWolfgang Denk 48760668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 48770668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 48780668236bSWolfgang Denk 4879c609719bSwdenkWhen you send a patch, please include the following information with 4880c609719bSwdenkit: 4881c609719bSwdenk 4882c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4883c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4884c609719bSwdenk patch actually fixes something. 4885c609719bSwdenk 4886c609719bSwdenk* For new features: a description of the feature and your 4887c609719bSwdenk implementation. 4888c609719bSwdenk 4889c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4890c609719bSwdenk 4891c609719bSwdenk* For major contributions, your entry to the CREDITS file 4892c609719bSwdenk 4893c609719bSwdenk* When you add support for a new board, don't forget to add this 48947ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 4895c609719bSwdenk 4896c609719bSwdenk* If your patch adds new configuration options, don't forget to 4897c609719bSwdenk document these in the README file. 4898c609719bSwdenk 4899218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4900218ca724SWolfgang Denk recommended) you can easily generate the patch using the 49017ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 4902218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4903218ca724SWolfgang Denk with some other mail clients. 4904c609719bSwdenk 4905218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4906218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4907218ca724SWolfgang Denk GNU diff. 49086dff5529Swdenk 4909218ca724SWolfgang Denk The current directory when running this command shall be the parent 4910218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4911218ca724SWolfgang Denk your patch includes sufficient directory information for the 4912218ca724SWolfgang Denk affected files). 4913218ca724SWolfgang Denk 4914218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4915218ca724SWolfgang Denk and compressed attachments must not be used. 4916c609719bSwdenk 491752f52c14Swdenk* If one logical set of modifications affects or creates several 491852f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 491952f52c14Swdenk 492052f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 492152f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 492252f52c14Swdenk 492352f52c14Swdenk 4924c609719bSwdenkNotes: 4925c609719bSwdenk 4926c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4927c609719bSwdenk source tree and make sure that no errors or warnings are reported 4928c609719bSwdenk for any of the boards. 4929c609719bSwdenk 4930c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4931c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4932c609719bSwdenk returned with a request to re-formatting / split it. 4933c609719bSwdenk 4934c609719bSwdenk* If you modify existing code, make sure that your new code does not 4935c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4936c609719bSwdenk When adding new features, these should compile conditionally only 4937c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4938c609719bSwdenk disabled must not need more memory than the old code without your 4939c609719bSwdenk modification. 494090dc6704Swdenk 49410668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 49420668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 49430668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 49440668236bSWolfgang Denk bigger than the size limit should be avoided. 4945