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 377afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 378afa6b551SPrabhakar Kushwaha 379afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 380afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 381afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 382afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 383afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 384afa6b551SPrabhakar Kushwaha purpose. 385afa6b551SPrabhakar Kushwaha 3866cb461b4SDaniel Schwierzeck- Generic CPU options: 3876cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 3886cb461b4SDaniel Schwierzeck 3896cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 3906cb461b4SDaniel Schwierzeck values is arch specific. 3916cb461b4SDaniel Schwierzeck 3920b953ffcSMarkus Klotzbuecher- Intel Monahans options: 3936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 3940b953ffcSMarkus Klotzbuecher 3950b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 3960b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 3970b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 3980b953ffcSMarkus Klotzbuecher 3996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 4000b953ffcSMarkus Klotzbuecher 4010b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 4020b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 4030b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 4040b953ffcSMarkus Klotzbuecher by this value. 4050b953ffcSMarkus Klotzbuecher 40692bbd64eSDaniel Schwierzeck- MIPS CPU options: 40792bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 40892bbd64eSDaniel Schwierzeck 40992bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 41092bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 41192bbd64eSDaniel Schwierzeck relocation. 41292bbd64eSDaniel Schwierzeck 41392bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 41492bbd64eSDaniel Schwierzeck 41592bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 41692bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 41792bbd64eSDaniel Schwierzeck Possible values are: 41892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 41992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 42092bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 42192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 42292bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 42392bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 42492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 42592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 42692bbd64eSDaniel Schwierzeck 42792bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 42892bbd64eSDaniel Schwierzeck 42992bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 43092bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 43192bbd64eSDaniel Schwierzeck 43292bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 43392bbd64eSDaniel Schwierzeck 43492bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 43592bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 43692bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 43792bbd64eSDaniel Schwierzeck 438b67d8816SChristian Riesch- ARM options: 439b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 440b67d8816SChristian Riesch 441b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 442b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 443b67d8816SChristian Riesch 4445356f545SAneesh V CONFIG_SYS_THUMB_BUILD 4455356f545SAneesh V 4465356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 4475356f545SAneesh V set for ARM architectures. Thumb instruction set provides 4485356f545SAneesh V better code density. For ARM architectures that support 4495356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 4505356f545SAneesh V GCC. 4515356f545SAneesh V 4525da627a4Swdenk- Linux Kernel Interface: 453c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 454c609719bSwdenk 455c609719bSwdenk U-Boot stores all clock information in Hz 456c609719bSwdenk internally. For binary compatibility with older Linux 457c609719bSwdenk kernels (which expect the clocks passed in the 458c609719bSwdenk bd_info data to be in MHz) the environment variable 459c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 460c609719bSwdenk converts clock data to MHZ before passing it to the 461c609719bSwdenk Linux kernel. 462c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 463c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 464c609719bSwdenk default environment. 465c609719bSwdenk 4665da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 4675da627a4Swdenk 46811ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 4695da627a4Swdenk expect it to be in bytes, others in MB. 4705da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 4715da627a4Swdenk 472fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 473f57f70aaSWolfgang Denk 474f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 475213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 476213bf8c8SGerald Van Baren concepts). 477213bf8c8SGerald Van Baren 478213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 479213bf8c8SGerald Van Baren * New libfdt-based support 480213bf8c8SGerald Van Baren * Adds the "fdt" command 4813bb342fcSKim Phillips * The bootm command automatically updates the fdt 482213bf8c8SGerald Van Baren 483b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 484b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 485b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 486b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 487f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 488c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 489f57f70aaSWolfgang Denk 49011ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 49111ccc33fSMarcel Ziswiler addresses 4923bb342fcSKim Phillips 4934e253137SKumar Gala CONFIG_OF_BOARD_SETUP 4944e253137SKumar Gala 4954e253137SKumar Gala Board code has addition modification that it wants to make 4964e253137SKumar Gala to the flat device tree before handing it off to the kernel 4976705d81eSwdenk 4980267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 4990267768eSMatthew McClintock 50011ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 5010267768eSMatthew McClintock param header, the default value is zero if undefined. 5020267768eSMatthew McClintock 5033887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 5043887c3fbSHeiko Schocher 5053887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 5063887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 5073887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 5083887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 5093887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 5103887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 5113887c3fbSHeiko Schocher 5127eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 5137eb29398SIgor Grinberg 5147eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 5157eb29398SIgor Grinberg machine type and must be used to specify the machine type 5167eb29398SIgor Grinberg number as it appears in the ARM machine registry 5177eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 5187eb29398SIgor Grinberg Only boards that have multiple machine types supported 5197eb29398SIgor Grinberg in a single configuration file and the machine type is 5207eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 5217eb29398SIgor Grinberg 5220b2f4ecaSNiklaus Giger- vxWorks boot parameters: 5230b2f4ecaSNiklaus Giger 5240b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 5250b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 5260b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 5270b2f4ecaSNiklaus Giger 5280b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5290b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5300b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5310b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5320b2f4ecaSNiklaus Giger 5330b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5340b2f4ecaSNiklaus Giger 5350b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5360b2f4ecaSNiklaus Giger 5370b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5380b2f4ecaSNiklaus Giger the defaults discussed just above. 5390b2f4ecaSNiklaus Giger 5402c451f78SAneesh V- Cache Configuration: 5412c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 5422c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 5432c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 5442c451f78SAneesh V 54593bc2193SAneesh V- Cache Configuration for ARM: 54693bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 54793bc2193SAneesh V controller 54893bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 54993bc2193SAneesh V controller register space 55093bc2193SAneesh V 5516705d81eSwdenk- Serial Ports: 55248d0192fSAndreas Engel CONFIG_PL010_SERIAL 5536705d81eSwdenk 5546705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 5556705d81eSwdenk 55648d0192fSAndreas Engel CONFIG_PL011_SERIAL 5576705d81eSwdenk 5586705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 5596705d81eSwdenk 5606705d81eSwdenk CONFIG_PL011_CLOCK 5616705d81eSwdenk 5626705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 5636705d81eSwdenk the clock speed of the UARTs. 5646705d81eSwdenk 5656705d81eSwdenk CONFIG_PL01x_PORTS 5666705d81eSwdenk 5676705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 5686705d81eSwdenk define this to a list of base addresses for each (supported) 5696705d81eSwdenk port. See e.g. include/configs/versatile.h 5706705d81eSwdenk 571910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 572910f1ae3SJohn Rigby 573910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 574910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 575910f1ae3SJohn Rigby this variable to initialize the extra register. 576910f1ae3SJohn Rigby 577910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 578910f1ae3SJohn Rigby 579910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 580910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 581910f1ae3SJohn Rigby variable to flush the UART at init time. 582910f1ae3SJohn Rigby 5836705d81eSwdenk 584c609719bSwdenk- Console Interface: 585c609719bSwdenk Depending on board, define exactly one serial port 586c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 587c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 588c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 589c609719bSwdenk 590c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 591c609719bSwdenk port routines must be defined elsewhere 592c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 593c609719bSwdenk 594c609719bSwdenk CONFIG_CFB_CONSOLE 595c609719bSwdenk Enables console device for a color framebuffer. Needs following 596c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 597c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 598c609719bSwdenk (default big endian) 599c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 600c609719bSwdenk rectangle fill 601c609719bSwdenk (cf. smiLynxEM) 602c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 603c609719bSwdenk bit-blit (cf. smiLynxEM) 604c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 605c609719bSwdenk (cols=pitch) 606c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 607c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 608c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 609c609719bSwdenk (0-5, cf. cfb_console.c) 610c609719bSwdenk VIDEO_FB_ADRS framebuffer address 611c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 612c609719bSwdenk (i.e. i8042_kbd_init()) 613c609719bSwdenk VIDEO_TSTC_FCT test char fct 614c609719bSwdenk (i.e. i8042_tstc) 615c609719bSwdenk VIDEO_GETC_FCT get char fct 616c609719bSwdenk (i.e. i8042_getc) 617c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 618c609719bSwdenk (requires blink timer 619c609719bSwdenk cf. i8042.c) 6206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 621c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 622c609719bSwdenk upper right corner 623602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 624c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 625c609719bSwdenk upper left corner 626a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 627a6c7ad2fSwdenk linux_logo.h for logo. 628a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 629c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 63011ccc33fSMarcel Ziswiler additional board info beside 631c609719bSwdenk the logo 632c609719bSwdenk 633c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 634c609719bSwdenk default i/o. Serial console can be forced with 635c609719bSwdenk environment 'console=serial'. 636c609719bSwdenk 637a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 638a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 639a3ad8e26Swdenk the "silent" environment variable. See 640a3ad8e26Swdenk doc/README.silent for more information. 641a3ad8e26Swdenk 642c609719bSwdenk- Console Baudrate: 643c609719bSwdenk CONFIG_BAUDRATE - in bps 644c609719bSwdenk Select one of the baudrates listed in 6456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 647c609719bSwdenk 648c92fac91SHeiko Schocher- Console Rx buffer length 649c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 650c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6512b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 652c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 653c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 654c92fac91SHeiko Schocher the SMC. 655c92fac91SHeiko Schocher 6569558b48aSGraeme Russ- Pre-Console Buffer: 6579558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 6589558b48aSGraeme Russ initialised etc) all console output is silently discarded. 6599558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 6609558b48aSGraeme Russ buffer any console messages prior to the console being 6619558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 6629558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 6639558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 6649558b48aSGraeme Russ bytes are output before the console is initialised, the 6659558b48aSGraeme Russ earlier bytes are discarded. 6669558b48aSGraeme Russ 6679558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 6689558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 6699558b48aSGraeme Russ 670046a37bdSSonny Rao- Safe printf() functions 671046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 672046a37bdSSonny Rao the printf() functions. These are defined in 673046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 674046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 675046a37bdSSonny Rao If this option is not given then these functions will 676046a37bdSSonny Rao silently discard their buffer size argument - this means 677046a37bdSSonny Rao you are not getting any overflow checking in this case. 678046a37bdSSonny Rao 679c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 680c609719bSwdenk Delay before automatically booting the default image; 681c609719bSwdenk set to -1 to disable autoboot. 682c609719bSwdenk 683c609719bSwdenk See doc/README.autoboot for these options that 684c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 685c609719bSwdenk CONFIG_BOOT_RETRY_TIME 686c609719bSwdenk CONFIG_BOOT_RETRY_MIN 687c609719bSwdenk CONFIG_AUTOBOOT_KEYED 688c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 689c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 690c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 691c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 692c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 693c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 694c609719bSwdenk CONFIG_RESET_TO_RETRY 695c609719bSwdenk 696c609719bSwdenk- Autoboot Command: 697c609719bSwdenk CONFIG_BOOTCOMMAND 698c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 699c609719bSwdenk define a command string that is automatically executed 700c609719bSwdenk when no character is read on the console interface 701c609719bSwdenk within "Boot Delay" after reset. 702c609719bSwdenk 703c609719bSwdenk CONFIG_BOOTARGS 704c609719bSwdenk This can be used to pass arguments to the bootm 705c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 706c609719bSwdenk environment value "bootargs". 707c609719bSwdenk 708c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 709c609719bSwdenk The value of these goes into the environment as 710c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 711c609719bSwdenk as a convenience, when switching between booting from 71211ccc33fSMarcel Ziswiler RAM and NFS. 713c609719bSwdenk 714c609719bSwdenk- Pre-Boot Commands: 715c609719bSwdenk CONFIG_PREBOOT 716c609719bSwdenk 717c609719bSwdenk When this option is #defined, the existence of the 718c609719bSwdenk environment variable "preboot" will be checked 719c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 720c609719bSwdenk countdown and/or running the auto-boot command resp. 721c609719bSwdenk entering interactive mode. 722c609719bSwdenk 723c609719bSwdenk This feature is especially useful when "preboot" is 724c609719bSwdenk automatically generated or modified. For an example 725c609719bSwdenk see the LWMON board specific code: here "preboot" is 726c609719bSwdenk modified when the user holds down a certain 727c609719bSwdenk combination of keys on the (special) keyboard when 728c609719bSwdenk booting the systems 729c609719bSwdenk 730c609719bSwdenk- Serial Download Echo Mode: 731c609719bSwdenk CONFIG_LOADS_ECHO 732c609719bSwdenk If defined to 1, all characters received during a 733c609719bSwdenk serial download (using the "loads" command) are 734c609719bSwdenk echoed back. This might be needed by some terminal 735c609719bSwdenk emulations (like "cu"), but may as well just take 736c609719bSwdenk time on others. This setting #define's the initial 737c609719bSwdenk value of the "loads_echo" environment variable. 738c609719bSwdenk 739602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 740c609719bSwdenk CONFIG_KGDB_BAUDRATE 741c609719bSwdenk Select one of the baudrates listed in 7426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 743c609719bSwdenk 744c609719bSwdenk- Monitor Functions: 745602ad3b3SJon Loeliger Monitor commands can be included or excluded 746602ad3b3SJon Loeliger from the build by using the #include files 747602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 748602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 749602ad3b3SJon Loeliger and augmenting with additional #define's 750602ad3b3SJon Loeliger for wanted commands. 751c609719bSwdenk 752602ad3b3SJon Loeliger The default command configuration includes all commands 753602ad3b3SJon Loeliger except those marked below with a "*". 754602ad3b3SJon Loeliger 755602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 756602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 757602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 758602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 759602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 760602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 761602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 762602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 763710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 764602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 765602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 766602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 767a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 768a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 769a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 770a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 771602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 772602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 773246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 774602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 775602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 7760c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 777bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 778602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 779602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 780602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 781602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 782602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 783a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 784a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 785602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 786602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 787602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 788602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 789602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 790602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 7910c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 792602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 793602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 794602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 795602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 7961ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 797d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 798d22c338eSJoe Hershberger (169.254.*.*) 799602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 800602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 80102c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 80202c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 803602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 80456523f12Swdenk loop, loopw, mtest 805602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 806602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 807602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 80868d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 809602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 810602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 811e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 812e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 813602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 814602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 815602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 816602ad3b3SJon Loeliger host 817602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 818602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 819602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 820602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 821602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 822602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 823602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 824602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 825602ad3b3SJon Loeliger (4xx only) 826f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 827c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 82802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 82974de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 830602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 8317a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 8321fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 833ca366d0eSChe-liang Chiou CONFIG_CMD_TIME * run command and report execution time 834602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 835602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 836c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 837c609719bSwdenk 838c609719bSwdenk 839c609719bSwdenk EXAMPLE: If you want all functions except of network 840c609719bSwdenk support you can write: 841c609719bSwdenk 842602ad3b3SJon Loeliger #include "config_cmd_all.h" 843602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 844c609719bSwdenk 845213bf8c8SGerald Van Baren Other Commands: 846213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 847c609719bSwdenk 848c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 849602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 850c609719bSwdenk what you (and your U-Boot users) are doing. Data 851c609719bSwdenk cache cannot be enabled on systems like the 8xx or 852c609719bSwdenk 8260 (where accesses to the IMMR region must be 853c609719bSwdenk uncached), and it cannot be disabled on all other 854c609719bSwdenk systems where we (mis-) use the data cache to hold an 855c609719bSwdenk initial stack and some data. 856c609719bSwdenk 857c609719bSwdenk 858c609719bSwdenk XXX - this list needs to get updated! 859c609719bSwdenk 86045ba8077SSimon Glass- Device tree: 86145ba8077SSimon Glass CONFIG_OF_CONTROL 86245ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 86345ba8077SSimon Glass to configure its devices, instead of relying on statically 86445ba8077SSimon Glass compiled #defines in the board file. This option is 86545ba8077SSimon Glass experimental and only available on a few boards. The device 86645ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 86745ba8077SSimon Glass 8682c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 8692c0f79e4SSimon Glass be done using one of the two options below: 870bbb0b128SSimon Glass 871bbb0b128SSimon Glass CONFIG_OF_EMBED 872bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 873bbb0b128SSimon Glass binary in its image. This device tree file should be in the 874bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 875bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 876bbb0b128SSimon Glass the global data structure as gd->blob. 87745ba8077SSimon Glass 8782c0f79e4SSimon Glass CONFIG_OF_SEPARATE 8792c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 8802c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 8812c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 8822c0f79e4SSimon Glass 8832c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 8842c0f79e4SSimon Glass 8852c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 8862c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 8872c0f79e4SSimon Glass still use the individual files if you need something more 8882c0f79e4SSimon Glass exotic. 8892c0f79e4SSimon Glass 890c609719bSwdenk- Watchdog: 891c609719bSwdenk CONFIG_WATCHDOG 892c609719bSwdenk If this variable is defined, it enables watchdog 8936abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 8946abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 8956abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 8966abe6fb6SDetlev Zundel register. When supported for a specific SoC is 8976abe6fb6SDetlev Zundel available, then no further board specific code should 8986abe6fb6SDetlev Zundel be needed to use it. 8996abe6fb6SDetlev Zundel 9006abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 9016abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 9026abe6fb6SDetlev Zundel SoC, then define this variable and provide board 9036abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 904c609719bSwdenk 905c1551ea8Sstroese- U-Boot Version: 906c1551ea8Sstroese CONFIG_VERSION_VARIABLE 907c1551ea8Sstroese If this variable is defined, an environment variable 908c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 909c1551ea8Sstroese version as printed by the "version" command. 910c1551ea8Sstroese This variable is readonly. 911c1551ea8Sstroese 912c609719bSwdenk- Real-Time Clock: 913c609719bSwdenk 914602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 915c609719bSwdenk has to be selected, too. Define exactly one of the 916c609719bSwdenk following options: 917c609719bSwdenk 918c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 919c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 9204e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 921c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 9221cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 923c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 9247f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 9253bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 9269536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 9274c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 9286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 92971d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 93071d19f30SHeiko Schocher RV3029 RTC. 931c609719bSwdenk 932b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 933b37c7e5eSwdenk must also be configured. See I2C Support, below. 934b37c7e5eSwdenk 935e92739d3SPeter Tyser- GPIO Support: 936e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 937e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 938e92739d3SPeter Tyser 9395dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 9405dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 9415dec49caSChris Packham pins supported by a particular chip. 9425dec49caSChris Packham 943e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 944e92739d3SPeter Tyser must also be configured. See I2C Support, below. 945e92739d3SPeter Tyser 946c609719bSwdenk- Timestamp Support: 947c609719bSwdenk 948c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 949c609719bSwdenk (date and time) of an image is printed by image 950c609719bSwdenk commands like bootm or iminfo. This option is 951602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 952c609719bSwdenk 953c609719bSwdenk- Partition Support: 954c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 95507f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 956c609719bSwdenk 957602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 958218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 959218ca724SWolfgang Denk least one partition type as well. 960c609719bSwdenk 961c609719bSwdenk- IDE Reset method: 9624d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 9634d13cbadSwdenk board configurations files but used nowhere! 964c609719bSwdenk 9654d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 9664d13cbadSwdenk be performed by calling the function 9674d13cbadSwdenk ide_set_reset(int reset) 9684d13cbadSwdenk which has to be defined in a board specific file 969c609719bSwdenk 970c609719bSwdenk- ATAPI Support: 971c609719bSwdenk CONFIG_ATAPI 972c609719bSwdenk 973c609719bSwdenk Set this to enable ATAPI support. 974c609719bSwdenk 975c40b2956Swdenk- LBA48 Support 976c40b2956Swdenk CONFIG_LBA48 977c40b2956Swdenk 978c40b2956Swdenk Set this to enable support for disks larger than 137GB 9794b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 980c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 981c40b2956Swdenk support disks up to 2.1TB. 982c40b2956Swdenk 9836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 984c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 985c40b2956Swdenk Default is 32bit. 986c40b2956Swdenk 987c609719bSwdenk- SCSI Support: 988c609719bSwdenk At the moment only there is only support for the 989c609719bSwdenk SYM53C8XX SCSI controller; define 990c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 991c609719bSwdenk 9926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 9936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 9946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 995c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 996c609719bSwdenk devices. 9976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 998c609719bSwdenk 999c609719bSwdenk- NETWORK Support (PCI): 1000682011ffSwdenk CONFIG_E1000 1001ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1002ce5207e1SKyle Moffett 1003ce5207e1SKyle Moffett CONFIG_E1000_SPI 1004ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1005ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1006ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1007ce5207e1SKyle Moffett 1008ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1009ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1010ce5207e1SKyle Moffett example with the "sspi" command. 1011ce5207e1SKyle Moffett 1012ce5207e1SKyle Moffett CONFIG_CMD_E1000 1013ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1014ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1015682011ffSwdenk 1016ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 101711ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1018ac3315c2SAndre Schwarz 1019c609719bSwdenk CONFIG_EEPRO100 1020c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 102111ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1022c609719bSwdenk write routine for first time initialisation. 1023c609719bSwdenk 1024c609719bSwdenk CONFIG_TULIP 1025c609719bSwdenk Support for Digital 2114x chips. 1026c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1027c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1028c609719bSwdenk 1029c609719bSwdenk CONFIG_NATSEMI 1030c609719bSwdenk Support for National dp83815 chips. 1031c609719bSwdenk 1032c609719bSwdenk CONFIG_NS8382X 1033c609719bSwdenk Support for National dp8382[01] gigabit chips. 1034c609719bSwdenk 103545219c46Swdenk- NETWORK Support (other): 103645219c46Swdenk 1037c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1038c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1039c041e9d2SJens Scharsig 1040c041e9d2SJens Scharsig CONFIG_RMII 1041c041e9d2SJens Scharsig Define this to use reduced MII inteface 1042c041e9d2SJens Scharsig 1043c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1044c041e9d2SJens Scharsig If this defined, the driver is quiet. 1045c041e9d2SJens Scharsig The driver doen't show link status messages. 1046c041e9d2SJens Scharsig 1047efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1048efdd7319SRob Herring Support for the Calxeda XGMAC device 1049efdd7319SRob Herring 105045219c46Swdenk CONFIG_DRIVER_LAN91C96 105145219c46Swdenk Support for SMSC's LAN91C96 chips. 105245219c46Swdenk 105345219c46Swdenk CONFIG_LAN91C96_BASE 105445219c46Swdenk Define this to hold the physical address 105545219c46Swdenk of the LAN91C96's I/O space 105645219c46Swdenk 105745219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 105845219c46Swdenk Define this to enable 32 bit addressing 105945219c46Swdenk 1060f39748aeSwdenk CONFIG_DRIVER_SMC91111 1061f39748aeSwdenk Support for SMSC's LAN91C111 chip 1062f39748aeSwdenk 1063f39748aeSwdenk CONFIG_SMC91111_BASE 1064f39748aeSwdenk Define this to hold the physical address 1065f39748aeSwdenk of the device (I/O space) 1066f39748aeSwdenk 1067f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1068f39748aeSwdenk Define this if data bus is 32 bits 1069f39748aeSwdenk 1070f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1071f39748aeSwdenk Define this to use i/o functions instead of macros 1072f39748aeSwdenk (some hardware wont work with macros) 1073f39748aeSwdenk 1074dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1075dc02badaSHeiko Schocher Support for davinci emac 1076dc02badaSHeiko Schocher 1077dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1078dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1079dc02badaSHeiko Schocher 1080b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1081b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1082b3dbf4a5SMacpaul Lin 1083b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1084b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1085b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1086b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1087b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1088b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1089b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1090b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1091b3dbf4a5SMacpaul Lin 1092c2fff331SMike Rapoport CONFIG_SMC911X 1093557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1094557b377dSJens Gehrlein 1095c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1096557b377dSJens Gehrlein Define this to hold the physical address 1097557b377dSJens Gehrlein of the device (I/O space) 1098557b377dSJens Gehrlein 1099c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1100557b377dSJens Gehrlein Define this if data bus is 32 bits 1101557b377dSJens Gehrlein 1102c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1103557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1104557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1105c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1106557b377dSJens Gehrlein 11073d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 11083d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 11093d0075faSYoshihiro Shimoda 11103d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 11113d0075faSYoshihiro Shimoda Define the number of ports to be used 11123d0075faSYoshihiro Shimoda 11133d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 11143d0075faSYoshihiro Shimoda Define the ETH PHY's address 11153d0075faSYoshihiro Shimoda 111668260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 111768260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 111868260aabSYoshihiro Shimoda 11195e124724SVadim Bendebury- TPM Support: 11205e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 11215e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 11225e124724SVadim Bendebury per system is supported at this time. 11235e124724SVadim Bendebury 11245e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 11255e124724SVadim Bendebury Base address where the generic TPM device is mapped 11265e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 11275e124724SVadim Bendebury 0xfed40000. 11285e124724SVadim Bendebury 1129c609719bSwdenk- USB Support: 1130c609719bSwdenk At the moment only the UHCI host controller is 11314d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1132c609719bSwdenk CONFIG_USB_UHCI to enable it. 1133c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 113430d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1135c609719bSwdenk storage devices. 1136c609719bSwdenk Note: 1137c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1138c609719bSwdenk (TEAC FD-05PUB). 11394d13cbadSwdenk MPC5200 USB requires additional defines: 11404d13cbadSwdenk CONFIG_USB_CLOCK 11414d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1142307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1143307ecb6dSEric Millbrandt for USB on PSC3 11444d13cbadSwdenk CONFIG_USB_CONFIG 11454d13cbadSwdenk for differential drivers: 0x00001000 11464d13cbadSwdenk for single ended drivers: 0x00005000 1147307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1148307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 11496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1150fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1151fdcfaa1bSZhang Wei instead of using asynchronous interrupts 11524d13cbadSwdenk 11539ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 11549ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 11559ab4ce22SSimon Glass 115616c8d5e7SWolfgang Denk- USB Device: 115716c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 115816c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 115916c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 116011ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 116116c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 116216c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 116316c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 116416c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 116516c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 116616c8d5e7SWolfgang Denk a Linux host by 116716c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 116816c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 116916c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 117016c8d5e7SWolfgang Denk might be defined in YourBoardName.h 117116c8d5e7SWolfgang Denk 117216c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 117316c8d5e7SWolfgang Denk Define this to build a UDC device 117416c8d5e7SWolfgang Denk 117516c8d5e7SWolfgang Denk CONFIG_USB_TTY 117616c8d5e7SWolfgang Denk Define this to have a tty type of device available to 117716c8d5e7SWolfgang Denk talk to the UDC device 117816c8d5e7SWolfgang Denk 1179f9da0f89SVipin KUMAR CONFIG_USBD_HS 1180f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1181f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1182f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1183f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1184f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1185f9da0f89SVipin KUMAR speed. 1186f9da0f89SVipin KUMAR 11876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 118816c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 118916c8d5e7SWolfgang Denk be set to usbtty. 119016c8d5e7SWolfgang Denk 119116c8d5e7SWolfgang Denk mpc8xx: 11926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 119316c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 11946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 119516c8d5e7SWolfgang Denk 11966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 119716c8d5e7SWolfgang Denk Derive USB clock from brgclk 11986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 119916c8d5e7SWolfgang Denk 120016c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 120116c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 120216c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 120316c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 120416c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 120516c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 120616c8d5e7SWolfgang Denk 120716c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 120816c8d5e7SWolfgang Denk Define this string as the name of your company for 120916c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 121016c8d5e7SWolfgang Denk 121116c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 121216c8d5e7SWolfgang Denk Define this string as the name of your product 121316c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 121416c8d5e7SWolfgang Denk 121516c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 121616c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 121716c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 121816c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 121916c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 122016c8d5e7SWolfgang Denk 122116c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 122216c8d5e7SWolfgang Denk Define this as the unique Product ID 122316c8d5e7SWolfgang Denk for your device 122416c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1225c609719bSwdenk 1226d70a560fSIgor Grinberg- ULPI Layer Support: 1227d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1228d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1229d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1230d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1231d70a560fSIgor Grinberg viewport is supported. 1232d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1233d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 1234c609719bSwdenk 1235c609719bSwdenk- MMC Support: 1236c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1237c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1238c609719bSwdenk accessed from the boot prompt by mapping the device 1239c609719bSwdenk to physical memory similar to flash. Command line is 1240602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1241602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1242c609719bSwdenk 1243afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1244afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1245afb35666SYoshihiro Shimoda 1246afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1247afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1248afb35666SYoshihiro Shimoda 1249afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1250afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1251afb35666SYoshihiro Shimoda 12526705d81eSwdenk- Journaling Flash filesystem support: 12536705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 12546705d81eSwdenk CONFIG_JFFS2_NAND_DEV 12556705d81eSwdenk Define these for a default partition on a NAND device 12566705d81eSwdenk 12576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 12586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 12596705d81eSwdenk Define these for a default partition on a NOR device 12606705d81eSwdenk 12616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 12626705d81eSwdenk Define this to create an own partition. You have to provide a 12636705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 12646705d81eSwdenk 12656705d81eSwdenk If you define only one JFFS2 partition you may also want to 12666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 12676705d81eSwdenk to disable the command chpart. This is the default when you 12686705d81eSwdenk have not defined a custom partition 12696705d81eSwdenk 1270c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1271c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1272656f4c65SDonggeun Kim 1273656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1274656f4c65SDonggeun Kim file in FAT formatted partition. 1275656f4c65SDonggeun Kim 1276656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1277656f4c65SDonggeun Kim user to write files to FAT. 1278c30a15e5SDonggeun Kim 1279c609719bSwdenk- Keyboard Support: 1280c609719bSwdenk CONFIG_ISA_KEYBOARD 1281c609719bSwdenk 1282c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1283c609719bSwdenk support 1284c609719bSwdenk 1285c609719bSwdenk CONFIG_I8042_KBD 1286c609719bSwdenk Standard PC keyboard driver with US (is default) and 1287c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1288c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1289c609719bSwdenk for cfb_console. Supports cursor blinking. 1290c609719bSwdenk 1291c609719bSwdenk- Video support: 1292c609719bSwdenk CONFIG_VIDEO 1293c609719bSwdenk 1294c609719bSwdenk Define this to enable video support (for output to 1295c609719bSwdenk video). 1296c609719bSwdenk 1297c609719bSwdenk CONFIG_VIDEO_CT69000 1298c609719bSwdenk 1299c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1300c609719bSwdenk 1301c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1302eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1303eeb1b77bSwdenk video output is selected via environment 'videoout' 1304eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1305eeb1b77bSwdenk assumed. 1306c609719bSwdenk 1307eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 130811ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1309eeb1b77bSwdenk are possible: 1310eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1311eeb1b77bSwdenk Following standard modes are supported (* is default): 1312eeb1b77bSwdenk 1313eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1314eeb1b77bSwdenk -------------+--------------------------------------------- 1315eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1316eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1317eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1318eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1319eeb1b77bSwdenk -------------+--------------------------------------------- 1320c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1321c609719bSwdenk 1322eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 13237817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1324eeb1b77bSwdenk 1325eeb1b77bSwdenk 1326a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1327a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1328a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1329a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1330a6c7ad2fSwdenk 13317d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 13327d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 13337d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 13347d3053fbSTimur Tabi support, and should also define these other macros: 13357d3053fbSTimur Tabi 13367d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 13377d3053fbSTimur Tabi CONFIG_VIDEO 13387d3053fbSTimur Tabi CONFIG_CMD_BMP 13397d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 13407d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 13417d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 13427d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 13437d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 13447d3053fbSTimur Tabi 1345ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1346ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1347ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1348ba8e76bdSTimur Tabi description of this variable. 13497d3053fbSTimur Tabi 1350682011ffSwdenk- Keyboard Support: 1351682011ffSwdenk CONFIG_KEYBOARD 1352682011ffSwdenk 1353682011ffSwdenk Define this to enable a custom keyboard support. 1354682011ffSwdenk This simply calls drv_keyboard_init() which must be 1355682011ffSwdenk defined in your board-specific files. 1356682011ffSwdenk The only board using this so far is RBC823. 1357a6c7ad2fSwdenk 1358c609719bSwdenk- LCD Support: CONFIG_LCD 1359c609719bSwdenk 1360c609719bSwdenk Define this to enable LCD support (for output to LCD 1361c609719bSwdenk display); also select one of the supported displays 1362c609719bSwdenk by defining one of these: 1363c609719bSwdenk 136439cf4804SStelian Pop CONFIG_ATMEL_LCD: 136539cf4804SStelian Pop 136639cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 136739cf4804SStelian Pop 1368fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1369c609719bSwdenk 1370fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1371c609719bSwdenk 1372fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1373c609719bSwdenk 1374fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1375fd3103bbSwdenk Active, color, single scan. 1376fd3103bbSwdenk 1377fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1378fd3103bbSwdenk 1379fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1380c609719bSwdenk Active, color, single scan. 1381c609719bSwdenk 1382c609719bSwdenk CONFIG_SHARP_16x9 1383c609719bSwdenk 1384c609719bSwdenk Sharp 320x240. Active, color, single scan. 1385c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1386c609719bSwdenk 1387c609719bSwdenk CONFIG_SHARP_LQ64D341 1388c609719bSwdenk 1389c609719bSwdenk Sharp LQ64D341 display, 640x480. 1390c609719bSwdenk Active, color, single scan. 1391c609719bSwdenk 1392c609719bSwdenk CONFIG_HLD1045 1393c609719bSwdenk 1394c609719bSwdenk HLD1045 display, 640x480. 1395c609719bSwdenk Active, color, single scan. 1396c609719bSwdenk 1397c609719bSwdenk CONFIG_OPTREX_BW 1398c609719bSwdenk 1399c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1400c609719bSwdenk or 1401c609719bSwdenk Hitachi LMG6912RPFC-00T 1402c609719bSwdenk or 1403c609719bSwdenk Hitachi SP14Q002 1404c609719bSwdenk 1405c609719bSwdenk 320x240. Black & white. 1406c609719bSwdenk 1407c609719bSwdenk Normally display is black on white background; define 14086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1409c609719bSwdenk 14107152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1411d791b1dcSwdenk 1412d791b1dcSwdenk If this option is set, the environment is checked for 1413d791b1dcSwdenk a variable "splashimage". If found, the usual display 1414d791b1dcSwdenk of logo, copyright and system information on the LCD 1415e94d2cd9Swdenk is suppressed and the BMP image at the address 1416d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1417d791b1dcSwdenk console is redirected to the "nulldev", too. This 1418d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1419d791b1dcSwdenk loaded very quickly after power-on. 1420d791b1dcSwdenk 14211ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 14221ca298ceSMatthias Weisser 14231ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 14241ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 14251ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 14261ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 14271ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 14281ca298ceSMatthias Weisser specify 'm' for centering the image. 14291ca298ceSMatthias Weisser 14301ca298ceSMatthias Weisser Example: 14311ca298ceSMatthias Weisser setenv splashpos m,m 14321ca298ceSMatthias Weisser => image at center of screen 14331ca298ceSMatthias Weisser 14341ca298ceSMatthias Weisser setenv splashpos 30,20 14351ca298ceSMatthias Weisser => image at x = 30 and y = 20 14361ca298ceSMatthias Weisser 14371ca298ceSMatthias Weisser setenv splashpos -10,m 14381ca298ceSMatthias Weisser => vertically centered image 14391ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 14401ca298ceSMatthias Weisser 144198f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 144298f4a3dfSStefan Roese 144398f4a3dfSStefan Roese If this option is set, additionally to standard BMP 144498f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 144598f4a3dfSStefan Roese splashscreen support or the bmp command. 144698f4a3dfSStefan Roese 1447d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1448d5011762SAnatolij Gustschin 1449d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1450d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1451d5011762SAnatolij Gustschin bmp command. 1452d5011762SAnatolij Gustschin 1453c29fdfc1Swdenk- Compression support: 1454c29fdfc1Swdenk CONFIG_BZIP2 1455c29fdfc1Swdenk 1456c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1457c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1458c29fdfc1Swdenk compressed images are supported. 1459c29fdfc1Swdenk 1460c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 14616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1462c29fdfc1Swdenk be at least 4MB. 1463d791b1dcSwdenk 1464fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1465fc9c1727SLuigi 'Comio' Mantellini 1466fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1467fc9c1727SLuigi 'Comio' Mantellini images is included. 1468fc9c1727SLuigi 'Comio' Mantellini 1469fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1470fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1471fc9c1727SLuigi 'Comio' Mantellini formula: 1472fc9c1727SLuigi 'Comio' Mantellini 1473fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1474fc9c1727SLuigi 'Comio' Mantellini 1475fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1476fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1477fc9c1727SLuigi 'Comio' Mantellini 1478fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1479fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1480fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1481fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1482fc9c1727SLuigi 'Comio' Mantellini 1483fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1484fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 14856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1486fc9c1727SLuigi 'Comio' Mantellini 148717ea1177Swdenk- MII/PHY support: 148817ea1177Swdenk CONFIG_PHY_ADDR 148917ea1177Swdenk 149017ea1177Swdenk The address of PHY on MII bus. 149117ea1177Swdenk 149217ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 149317ea1177Swdenk 149417ea1177Swdenk The clock frequency of the MII bus 149517ea1177Swdenk 149617ea1177Swdenk CONFIG_PHY_GIGE 149717ea1177Swdenk 149817ea1177Swdenk If this option is set, support for speed/duplex 149911ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 150017ea1177Swdenk 150117ea1177Swdenk CONFIG_PHY_RESET_DELAY 150217ea1177Swdenk 150317ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 150417ea1177Swdenk reset before any MII register access is possible. 150517ea1177Swdenk For such PHY, set this option to the usec delay 150617ea1177Swdenk required. (minimum 300usec for LXT971A) 150717ea1177Swdenk 150817ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 150917ea1177Swdenk 151017ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 151117ea1177Swdenk command issued before MII status register can be read 151217ea1177Swdenk 1513c609719bSwdenk- Ethernet address: 1514c609719bSwdenk CONFIG_ETHADDR 1515c68a05feSrichardretanubun CONFIG_ETH1ADDR 1516c609719bSwdenk CONFIG_ETH2ADDR 1517c609719bSwdenk CONFIG_ETH3ADDR 1518c68a05feSrichardretanubun CONFIG_ETH4ADDR 1519c68a05feSrichardretanubun CONFIG_ETH5ADDR 1520c609719bSwdenk 152111ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 152211ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1523c609719bSwdenk is not determined automatically. 1524c609719bSwdenk 1525c609719bSwdenk- IP address: 1526c609719bSwdenk CONFIG_IPADDR 1527c609719bSwdenk 1528c609719bSwdenk Define a default value for the IP address to use for 152911ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1530c609719bSwdenk determined through e.g. bootp. 15311ebcd654SWolfgang Denk (Environment variable "ipaddr") 1532c609719bSwdenk 1533c609719bSwdenk- Server IP address: 1534c609719bSwdenk CONFIG_SERVERIP 1535c609719bSwdenk 1536c609719bSwdenk Defines a default value for the IP address of a TFTP 1537c609719bSwdenk server to contact when using the "tftboot" command. 15381ebcd654SWolfgang Denk (Environment variable "serverip") 1539c609719bSwdenk 154097cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 154197cfe861SRobin Getz 154297cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 154397cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 154497cfe861SRobin Getz 15451ebcd654SWolfgang Denk- Gateway IP address: 15461ebcd654SWolfgang Denk CONFIG_GATEWAYIP 15471ebcd654SWolfgang Denk 15481ebcd654SWolfgang Denk Defines a default value for the IP address of the 15491ebcd654SWolfgang Denk default router where packets to other networks are 15501ebcd654SWolfgang Denk sent to. 15511ebcd654SWolfgang Denk (Environment variable "gatewayip") 15521ebcd654SWolfgang Denk 15531ebcd654SWolfgang Denk- Subnet mask: 15541ebcd654SWolfgang Denk CONFIG_NETMASK 15551ebcd654SWolfgang Denk 15561ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 15571ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 15581ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 15591ebcd654SWolfgang Denk forwarded through a router. 15601ebcd654SWolfgang Denk (Environment variable "netmask") 15611ebcd654SWolfgang Denk 156253a5c424SDavid Updegraff- Multicast TFTP Mode: 156353a5c424SDavid Updegraff CONFIG_MCAST_TFTP 156453a5c424SDavid Updegraff 156553a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 156653a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 156711ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 156853a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 156953a5c424SDavid Updegraff multicast group. 157053a5c424SDavid Updegraff 1571c609719bSwdenk- BOOTP Recovery Mode: 1572c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1573c609719bSwdenk 1574c609719bSwdenk If you have many targets in a network that try to 1575c609719bSwdenk boot using BOOTP, you may want to avoid that all 1576c609719bSwdenk systems send out BOOTP requests at precisely the same 1577c609719bSwdenk moment (which would happen for instance at recovery 1578c609719bSwdenk from a power failure, when all systems will try to 1579c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1580c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1581c609719bSwdenk inserted before sending out BOOTP requests. The 15826c33c785SWolfgang Denk following delays are inserted then: 1583c609719bSwdenk 1584c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1585c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1586c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1587c609719bSwdenk 4th and following 1588c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1589c609719bSwdenk 1590fe389a82Sstroese- DHCP Advanced Options: 15911fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 15921fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1593fe389a82Sstroese 15941fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 15951fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 15961fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 15971fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 15981fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 15991fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 16001fe80d79SJon Loeliger CONFIG_BOOTP_DNS 16011fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 16021fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 16031fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 16041fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 16051fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 16062c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1607fe389a82Sstroese 16085d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 16095d110f0aSWilson Callan environment variable, not the BOOTP server. 1610fe389a82Sstroese 16112c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 16122c00e099SJoe Hershberger after the configured retry count, the call will fail 16132c00e099SJoe Hershberger instead of starting over. This can be used to fail over 16142c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 16152c00e099SJoe Hershberger is not available. 16162c00e099SJoe Hershberger 1617fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1618fe389a82Sstroese serverip from a DHCP server, it is possible that more 1619fe389a82Sstroese than one DNS serverip is offered to the client. 1620fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1621fe389a82Sstroese serverip will be stored in the additional environment 1622fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1623fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 16241fe80d79SJon Loeliger is defined. 1625fe389a82Sstroese 1626fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1627fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1628fe389a82Sstroese need the hostname of the DHCP requester. 16295d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 16301fe80d79SJon Loeliger of the "hostname" environment variable is passed as 16311fe80d79SJon Loeliger option 12 to the DHCP server. 1632fe389a82Sstroese 1633d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1634d9a2f416SAras Vaichas 1635d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1636d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1637d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1638d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1639d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1640d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1641d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1642d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1643d9a2f416SAras Vaichas that one of the retries will be successful but note that 1644d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1645d9a2f416SAras Vaichas this delay. 1646d9a2f416SAras Vaichas 1647d22c338eSJoe Hershberger - Link-local IP address negotiation: 1648d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1649d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1650d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1651d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1652d22c338eSJoe Hershberger 1653d22c338eSJoe Hershberger See doc/README.link-local for more information. 1654d22c338eSJoe Hershberger 1655a3d991bdSwdenk - CDP Options: 1656a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1657a3d991bdSwdenk 1658a3d991bdSwdenk The device id used in CDP trigger frames. 1659a3d991bdSwdenk 1660a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1661a3d991bdSwdenk 1662a3d991bdSwdenk A two character string which is prefixed to the MAC address 1663a3d991bdSwdenk of the device. 1664a3d991bdSwdenk 1665a3d991bdSwdenk CONFIG_CDP_PORT_ID 1666a3d991bdSwdenk 1667a3d991bdSwdenk A printf format string which contains the ascii name of 1668a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 166911ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1670a3d991bdSwdenk 1671a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1672a3d991bdSwdenk 1673a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1674a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1675a3d991bdSwdenk 1676a3d991bdSwdenk CONFIG_CDP_VERSION 1677a3d991bdSwdenk 1678a3d991bdSwdenk An ascii string containing the version of the software. 1679a3d991bdSwdenk 1680a3d991bdSwdenk CONFIG_CDP_PLATFORM 1681a3d991bdSwdenk 1682a3d991bdSwdenk An ascii string containing the name of the platform. 1683a3d991bdSwdenk 1684a3d991bdSwdenk CONFIG_CDP_TRIGGER 1685a3d991bdSwdenk 1686a3d991bdSwdenk A 32bit integer sent on the trigger. 1687a3d991bdSwdenk 1688a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1689a3d991bdSwdenk 1690a3d991bdSwdenk A 16bit integer containing the power consumption of the 1691a3d991bdSwdenk device in .1 of milliwatts. 1692a3d991bdSwdenk 1693a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1694a3d991bdSwdenk 1695a3d991bdSwdenk A byte containing the id of the VLAN. 1696a3d991bdSwdenk 1697c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1698c609719bSwdenk 1699c609719bSwdenk Several configurations allow to display the current 1700c609719bSwdenk status using a LED. For instance, the LED will blink 1701c609719bSwdenk fast while running U-Boot code, stop blinking as 1702c609719bSwdenk soon as a reply to a BOOTP request was received, and 1703c609719bSwdenk start blinking slow once the Linux kernel is running 1704c609719bSwdenk (supported by a status LED driver in the Linux 1705c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1706c609719bSwdenk feature in U-Boot. 1707c609719bSwdenk 1708c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1709c609719bSwdenk 1710c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1711c609719bSwdenk on those systems that support this (optional) 1712c609719bSwdenk feature, like the TQM8xxL modules. 1713c609719bSwdenk 1714c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1715c609719bSwdenk 1716b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1717b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 171811ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1719c609719bSwdenk 1720b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1721602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1722b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1723b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1724c609719bSwdenk command line interface. 1725c609719bSwdenk 1726bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1727c609719bSwdenk 1728b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1729b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1730b37c7e5eSwdenk support for I2C. 1731c609719bSwdenk 1732b37c7e5eSwdenk There are several other quantities that must also be 1733b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1734c609719bSwdenk 17356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1736b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 17376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 173811ccc33fSMarcel Ziswiler the CPU's i2c node address). 1739c609719bSwdenk 17408d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1741a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 17428d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 17438d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 17448d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1745b37c7e5eSwdenk 17465da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 17475da71efaSEric Millbrandt 17485da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 17495da71efaSEric Millbrandt chips might think that the current transfer is still 17505da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 17515da71efaSEric Millbrandt commands until the slave device responds. 17525da71efaSEric Millbrandt 1753b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1754b37c7e5eSwdenk 1755b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1756b37c7e5eSwdenk then the following macros need to be defined (examples are 1757b37c7e5eSwdenk from include/configs/lwmon.h): 1758c609719bSwdenk 1759c609719bSwdenk I2C_INIT 1760c609719bSwdenk 1761b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1762c609719bSwdenk controller or configure ports. 1763c609719bSwdenk 1764b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1765b37c7e5eSwdenk 1766c609719bSwdenk I2C_PORT 1767c609719bSwdenk 1768c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1769c609719bSwdenk assumes both bits are on the same port). Valid values 1770c609719bSwdenk are 0..3 for ports A..D. 1771c609719bSwdenk 1772c609719bSwdenk I2C_ACTIVE 1773c609719bSwdenk 1774c609719bSwdenk The code necessary to make the I2C data line active 1775c609719bSwdenk (driven). If the data line is open collector, this 1776c609719bSwdenk define can be null. 1777c609719bSwdenk 1778b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1779b37c7e5eSwdenk 1780c609719bSwdenk I2C_TRISTATE 1781c609719bSwdenk 1782c609719bSwdenk The code necessary to make the I2C data line tri-stated 1783c609719bSwdenk (inactive). If the data line is open collector, this 1784c609719bSwdenk define can be null. 1785c609719bSwdenk 1786b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1787b37c7e5eSwdenk 1788c609719bSwdenk I2C_READ 1789c609719bSwdenk 1790c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1791c609719bSwdenk FALSE if it is low. 1792c609719bSwdenk 1793b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1794b37c7e5eSwdenk 1795c609719bSwdenk I2C_SDA(bit) 1796c609719bSwdenk 1797c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1798c609719bSwdenk is FALSE, it clears it (low). 1799c609719bSwdenk 1800b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1801b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1802b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1803b37c7e5eSwdenk 1804c609719bSwdenk I2C_SCL(bit) 1805c609719bSwdenk 1806c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1807c609719bSwdenk is FALSE, it clears it (low). 1808c609719bSwdenk 1809b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1810b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1811b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1812b37c7e5eSwdenk 1813c609719bSwdenk I2C_DELAY 1814c609719bSwdenk 1815c609719bSwdenk This delay is invoked four times per clock cycle so this 1816c609719bSwdenk controls the rate of data transfer. The data rate thus 1817b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1818b37c7e5eSwdenk like: 1819b37c7e5eSwdenk 1820b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1821c609719bSwdenk 1822793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1823793b5726SMike Frysinger 1824793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1825793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1826793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1827793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1828793b5726SMike Frysinger 1829793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1830793b5726SMike Frysinger the generic GPIO functions. 1831793b5726SMike Frysinger 18326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 183347cd00faSwdenk 183447cd00faSwdenk When a board is reset during an i2c bus transfer 183547cd00faSwdenk chips might think that the current transfer is still 183647cd00faSwdenk in progress. On some boards it is possible to access 183747cd00faSwdenk the i2c SCLK line directly, either by using the 183847cd00faSwdenk processor pin as a GPIO or by having a second pin 183947cd00faSwdenk connected to the bus. If this option is defined a 184047cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 184147cd00faSwdenk is run early in the boot sequence. 184247cd00faSwdenk 184326a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 184426a33504SRichard Retanubun 184526a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 184626a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 184726a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 184826a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 184926a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 185026a33504SRichard Retanubun controller provide such a method. It is called at the end of 185126a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 185226a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 185326a33504SRichard Retanubun 185417ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 185517ea1177Swdenk 185617ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 185717ea1177Swdenk in u-boot bd_info structure based on u-boot environment 185817ea1177Swdenk variable "i2cfast". (see also i2cfast) 185917ea1177Swdenk 1860bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1861bb99ad6dSBen Warren 1862bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1863bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1864bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1865bb99ad6dSBen Warren Note that bus numbering is zero-based. 1866bb99ad6dSBen Warren 18676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1868bb99ad6dSBen Warren 1869bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 18700f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 18710f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 18720f89c54bSPeter Tyser a 1D array of device addresses 1873bb99ad6dSBen Warren 1874bb99ad6dSBen Warren e.g. 1875bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 18766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1877bb99ad6dSBen Warren 1878bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1879bb99ad6dSBen Warren 1880bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 18816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1882bb99ad6dSBen Warren 1883bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1884bb99ad6dSBen Warren 18856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1886be5e6181STimur Tabi 1887be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1888be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1889be5e6181STimur Tabi 18906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 18910dc018ecSStefan Roese 18920dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 18930dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 18940dc018ecSStefan Roese 18956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 18960dc018ecSStefan Roese 18970dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 18980dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 18990dc018ecSStefan Roese 19006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 19019ebbb54fSVictor Gallardo 19029ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 19039ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 19049ebbb54fSVictor Gallardo specified DTT device. 19059ebbb54fSVictor Gallardo 1906be5e6181STimur Tabi CONFIG_FSL_I2C 1907be5e6181STimur Tabi 1908be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 19097817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1910be5e6181STimur Tabi 191167b23a32SHeiko Schocher CONFIG_I2C_MUX 191267b23a32SHeiko Schocher 191367b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 191467b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 191567b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 191667b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 191767b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 191867b23a32SHeiko Schocher the muxes to activate this new "bus". 191967b23a32SHeiko Schocher 192067b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 192167b23a32SHeiko Schocher feature! 192267b23a32SHeiko Schocher 192367b23a32SHeiko Schocher Example: 192467b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 192567b23a32SHeiko Schocher The First mux with address 70 and channel 6 192667b23a32SHeiko Schocher The Second mux with address 71 and channel 4 192767b23a32SHeiko Schocher 192867b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 192967b23a32SHeiko Schocher 193067b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 193167b23a32SHeiko Schocher of I2C Busses with muxes: 193267b23a32SHeiko Schocher 193367b23a32SHeiko Schocher => i2c bus 193467b23a32SHeiko Schocher Busses reached over muxes: 193567b23a32SHeiko Schocher Bus ID: 2 193667b23a32SHeiko Schocher reached over Mux(es): 193767b23a32SHeiko Schocher pca9544a@70 ch: 4 193867b23a32SHeiko Schocher Bus ID: 3 193967b23a32SHeiko Schocher reached over Mux(es): 194067b23a32SHeiko Schocher pca9544a@70 ch: 6 194167b23a32SHeiko Schocher pca9544a@71 ch: 4 194267b23a32SHeiko Schocher => 194367b23a32SHeiko Schocher 194467b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1945f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1946f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 194767b23a32SHeiko Schocher the channel 4. 194867b23a32SHeiko Schocher 194967b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1950f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 195167b23a32SHeiko Schocher the 2 muxes. 195267b23a32SHeiko Schocher 195367b23a32SHeiko Schocher This option is actually implemented for the bitbanging 195467b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 195567b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 195667b23a32SHeiko Schocher to add this option to other architectures. 195767b23a32SHeiko Schocher 19582ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 19592ac6985aSAndrew Dyer 19602ac6985aSAndrew Dyer defining this will force the i2c_read() function in 19612ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 19622ac6985aSAndrew Dyer between writing the address pointer and reading the 19632ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 19642ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 19652ac6985aSAndrew Dyer devices can use either method, but some require one or 19662ac6985aSAndrew Dyer the other. 1967be5e6181STimur Tabi 1968c609719bSwdenk- SPI Support: CONFIG_SPI 1969c609719bSwdenk 1970c609719bSwdenk Enables SPI driver (so far only tested with 1971c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1972c609719bSwdenk D/As on the SACSng board) 1973c609719bSwdenk 19746639562eSYoshihiro Shimoda CONFIG_SH_SPI 19756639562eSYoshihiro Shimoda 19766639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 19776639562eSYoshihiro Shimoda only SH7757 is supported. 19786639562eSYoshihiro Shimoda 1979c609719bSwdenk CONFIG_SPI_X 1980c609719bSwdenk 1981c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1982c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1983c609719bSwdenk 1984c609719bSwdenk CONFIG_SOFT_SPI 1985c609719bSwdenk 1986c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1987c609719bSwdenk using hardware support. This is a general purpose 1988c609719bSwdenk driver that only requires three general I/O port pins 1989c609719bSwdenk (two outputs, one input) to function. If this is 1990c609719bSwdenk defined, the board configuration must define several 1991c609719bSwdenk SPI configuration items (port pins to use, etc). For 1992c609719bSwdenk an example, see include/configs/sacsng.h. 1993c609719bSwdenk 199404a9e118SBen Warren CONFIG_HARD_SPI 199504a9e118SBen Warren 199604a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 199704a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 199804a9e118SBen Warren must define a list of chip-select function pointers. 199904a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 200004a9e118SBen Warren example, see include/configs/mpc8349emds.h. 200104a9e118SBen Warren 200238254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 200338254f45SGuennadi Liakhovetski 200438254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 20052e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 200638254f45SGuennadi Liakhovetski 20070133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 20080133502eSMatthias Fuchs 20090133502eSMatthias Fuchs Enables FPGA subsystem. 20100133502eSMatthias Fuchs 20110133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 20120133502eSMatthias Fuchs 20130133502eSMatthias Fuchs Enables support for specific chip vendors. 20140133502eSMatthias Fuchs (ALTERA, XILINX) 20150133502eSMatthias Fuchs 20160133502eSMatthias Fuchs CONFIG_FPGA_<family> 20170133502eSMatthias Fuchs 20180133502eSMatthias Fuchs Enables support for FPGA family. 20190133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 20200133502eSMatthias Fuchs 20210133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2022c609719bSwdenk 2023c609719bSwdenk Specify the number of FPGA devices to support. 2024c609719bSwdenk 20256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2026c609719bSwdenk 2027c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2028c609719bSwdenk 20296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2030c609719bSwdenk 2031c609719bSwdenk Enable checks on FPGA configuration interface busy 2032c609719bSwdenk status by the configuration function. This option 2033c609719bSwdenk will require a board or device specific function to 2034c609719bSwdenk be written. 2035c609719bSwdenk 2036c609719bSwdenk CONFIG_FPGA_DELAY 2037c609719bSwdenk 2038c609719bSwdenk If defined, a function that provides delays in the FPGA 2039c609719bSwdenk configuration driver. 2040c609719bSwdenk 20416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2042c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2043c609719bSwdenk 20446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2045c609719bSwdenk 2046c609719bSwdenk Check for configuration errors during FPGA bitfile 2047c609719bSwdenk loading. For example, abort during Virtex II 2048c609719bSwdenk configuration if the INIT_B line goes low (which 2049c609719bSwdenk indicated a CRC error). 2050c609719bSwdenk 20516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2052c609719bSwdenk 2053c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2054c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2055c609719bSwdenk FPGA configuration sequence. The default time is 500 205611ccc33fSMarcel Ziswiler ms. 2057c609719bSwdenk 20586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2059c609719bSwdenk 2060c609719bSwdenk Maximum time to wait for BUSY to deassert during 206111ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2062c609719bSwdenk 20636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2064c609719bSwdenk 2065c609719bSwdenk Time to wait after FPGA configuration. The default is 206611ccc33fSMarcel Ziswiler 200 ms. 2067c609719bSwdenk 2068c609719bSwdenk- Configuration Management: 2069c609719bSwdenk CONFIG_IDENT_STRING 2070c609719bSwdenk 2071c609719bSwdenk If defined, this string will be added to the U-Boot 2072c609719bSwdenk version information (U_BOOT_VERSION) 2073c609719bSwdenk 2074c609719bSwdenk- Vendor Parameter Protection: 2075c609719bSwdenk 2076c609719bSwdenk U-Boot considers the values of the environment 2077c609719bSwdenk variables "serial#" (Board Serial Number) and 20787152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2079c609719bSwdenk are set once by the board vendor / manufacturer, and 2080c609719bSwdenk protects these variables from casual modification by 2081c609719bSwdenk the user. Once set, these variables are read-only, 2082c609719bSwdenk and write or delete attempts are rejected. You can 208311ccc33fSMarcel Ziswiler change this behaviour: 2084c609719bSwdenk 2085c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2086c609719bSwdenk file, the write protection for vendor parameters is 208747cd00faSwdenk completely disabled. Anybody can change or delete 2088c609719bSwdenk these parameters. 2089c609719bSwdenk 2090c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2091c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 209211ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2093c609719bSwdenk which can be changed exactly ONCE by the user. [The 2094c609719bSwdenk serial# is unaffected by this, i. e. it remains 2095c609719bSwdenk read-only.] 2096c609719bSwdenk 2097c609719bSwdenk- Protected RAM: 2098c609719bSwdenk CONFIG_PRAM 2099c609719bSwdenk 2100c609719bSwdenk Define this variable to enable the reservation of 2101c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2102c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2103c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2104c609719bSwdenk this default value by defining an environment 2105c609719bSwdenk variable "pram" to the number of kB you want to 2106c609719bSwdenk reserve. Note that the board info structure will 2107c609719bSwdenk still show the full amount of RAM. If pRAM is 2108c609719bSwdenk reserved, a new environment variable "mem" will 2109c609719bSwdenk automatically be defined to hold the amount of 2110c609719bSwdenk remaining RAM in a form that can be passed as boot 2111c609719bSwdenk argument to Linux, for instance like that: 2112c609719bSwdenk 2113fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2114c609719bSwdenk saveenv 2115c609719bSwdenk 2116c609719bSwdenk This way you can tell Linux not to use this memory, 2117c609719bSwdenk either, which results in a memory region that will 2118c609719bSwdenk not be affected by reboots. 2119c609719bSwdenk 2120c609719bSwdenk *WARNING* If your board configuration uses automatic 2121c609719bSwdenk detection of the RAM size, you must make sure that 2122c609719bSwdenk this memory test is non-destructive. So far, the 2123c609719bSwdenk following board configurations are known to be 2124c609719bSwdenk "pRAM-clean": 2125c609719bSwdenk 2126c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 2127c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 2128544d97e9SWolfgang Denk FLAGADM, TQM8260 2129c609719bSwdenk 2130c609719bSwdenk- Error Recovery: 2131c609719bSwdenk CONFIG_PANIC_HANG 2132c609719bSwdenk 2133c609719bSwdenk Define this variable to stop the system in case of a 2134c609719bSwdenk fatal error, so that you have to reset it manually. 2135c609719bSwdenk This is probably NOT a good idea for an embedded 213611ccc33fSMarcel Ziswiler system where you want the system to reboot 2137c609719bSwdenk automatically as fast as possible, but it may be 2138c609719bSwdenk useful during development since you can try to debug 2139c609719bSwdenk the conditions that lead to the situation. 2140c609719bSwdenk 2141c609719bSwdenk CONFIG_NET_RETRY_COUNT 2142c609719bSwdenk 2143c609719bSwdenk This variable defines the number of retries for 2144c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2145c609719bSwdenk before giving up the operation. If not defined, a 2146c609719bSwdenk default value of 5 is used. 2147c609719bSwdenk 214840cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 214940cb90eeSGuennadi Liakhovetski 215040cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 215140cb90eeSGuennadi Liakhovetski 215248a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 215348a3e999STetsuyuki Kobayashi 215448a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 215548a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 215648a3e999STetsuyuki Kobayashi try longer timeout such as 215748a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 215848a3e999STetsuyuki Kobayashi 2159c609719bSwdenk- Command Interpreter: 21608078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 216104a85b3bSwdenk 216204a85b3bSwdenk Enable auto completion of commands using TAB. 216304a85b3bSwdenk 21648078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 21658078f1a5SWolfgang Denk for the "hush" shell. 21668078f1a5SWolfgang Denk 21678078f1a5SWolfgang Denk 21686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2169c609719bSwdenk 2170c609719bSwdenk Define this variable to enable the "hush" shell (from 2171c609719bSwdenk Busybox) as command line interpreter, thus enabling 2172c609719bSwdenk powerful command line syntax like 2173c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2174c609719bSwdenk constructs ("shell scripts"). 2175c609719bSwdenk 2176c609719bSwdenk If undefined, you get the old, much simpler behaviour 2177c609719bSwdenk with a somewhat smaller memory footprint. 2178c609719bSwdenk 2179c609719bSwdenk 21806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2181c609719bSwdenk 2182c609719bSwdenk This defines the secondary prompt string, which is 2183c609719bSwdenk printed when the command interpreter needs more input 2184c609719bSwdenk to complete a command. Usually "> ". 2185c609719bSwdenk 2186c609719bSwdenk Note: 2187c609719bSwdenk 2188c609719bSwdenk In the current implementation, the local variables 2189c609719bSwdenk space and global environment variables space are 2190c609719bSwdenk separated. Local variables are those you define by 21913b57fe0aSwdenk simply typing `name=value'. To access a local 2192c609719bSwdenk variable later on, you have write `$name' or 21933b57fe0aSwdenk `${name}'; to execute the contents of a variable 21943b57fe0aSwdenk directly type `$name' at the command prompt. 2195c609719bSwdenk 2196c609719bSwdenk Global environment variables are those you use 2197c609719bSwdenk setenv/printenv to work with. To run a command stored 2198c609719bSwdenk in such a variable, you need to use the run command, 2199c609719bSwdenk and you must not use the '$' sign to access them. 2200c609719bSwdenk 2201c609719bSwdenk To store commands and special characters in a 2202c609719bSwdenk variable, please use double quotation marks 2203c609719bSwdenk surrounding the whole text of the variable, instead 2204c609719bSwdenk of the backslashes before semicolons and special 2205c609719bSwdenk symbols. 2206c609719bSwdenk 2207aa0c71acSWolfgang Denk- Commandline Editing and History: 2208aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2209aa0c71acSWolfgang Denk 221011ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2211aa0c71acSWolfgang Denk commandline input operations 2212aa0c71acSWolfgang Denk 2213a8c7c708Swdenk- Default Environment: 2214c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2215c609719bSwdenk 2216c609719bSwdenk Define this to contain any number of null terminated 2217c609719bSwdenk strings (variable = value pairs) that will be part of 22187152b1d0Swdenk the default environment compiled into the boot image. 22192262cfeeSwdenk 2220c609719bSwdenk For example, place something like this in your 2221c609719bSwdenk board's config file: 2222c609719bSwdenk 2223c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2224c609719bSwdenk "myvar1=value1\0" \ 2225c609719bSwdenk "myvar2=value2\0" 2226c609719bSwdenk 2227c609719bSwdenk Warning: This method is based on knowledge about the 2228c609719bSwdenk internal format how the environment is stored by the 22292262cfeeSwdenk U-Boot code. This is NOT an official, exported 2230c609719bSwdenk interface! Although it is unlikely that this format 22317152b1d0Swdenk will change soon, there is no guarantee either. 2232c609719bSwdenk You better know what you are doing here. 2233c609719bSwdenk 2234c609719bSwdenk Note: overly (ab)use of the default environment is 2235c609719bSwdenk discouraged. Make sure to check other ways to preset 223674de7aefSWolfgang Denk the environment like the "source" command or the 2237c609719bSwdenk boot command first. 2238c609719bSwdenk 22395e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 22405e724ca2SStephen Warren 22415e724ca2SStephen Warren Define this in order to add variables describing the 22425e724ca2SStephen Warren U-Boot build configuration to the default environment. 22435e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 22445e724ca2SStephen Warren 22455e724ca2SStephen Warren Enabling this option will cause the following to be defined: 22465e724ca2SStephen Warren 22475e724ca2SStephen Warren - CONFIG_SYS_ARCH 22485e724ca2SStephen Warren - CONFIG_SYS_CPU 22495e724ca2SStephen Warren - CONFIG_SYS_BOARD 22505e724ca2SStephen Warren - CONFIG_SYS_VENDOR 22515e724ca2SStephen Warren - CONFIG_SYS_SOC 22525e724ca2SStephen Warren 2253a8c7c708Swdenk- DataFlash Support: 22542abbe075Swdenk CONFIG_HAS_DATAFLASH 22552abbe075Swdenk 22562abbe075Swdenk Defining this option enables DataFlash features and 22572abbe075Swdenk allows to read/write in Dataflash via the standard 22582abbe075Swdenk commands cp, md... 22592abbe075Swdenk 2260f61ec45eSEric Nelson- Serial Flash support 2261f61ec45eSEric Nelson CONFIG_CMD_SF 2262f61ec45eSEric Nelson 2263f61ec45eSEric Nelson Defining this option enables SPI flash commands 2264f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2265f61ec45eSEric Nelson 2266f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2267f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2268f61ec45eSEric Nelson commands. 2269f61ec45eSEric Nelson 2270f61ec45eSEric Nelson The following defaults may be provided by the platform 2271f61ec45eSEric Nelson to handle the common case when only a single serial 2272f61ec45eSEric Nelson flash is present on the system. 2273f61ec45eSEric Nelson 2274f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2275f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2276f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2277f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2278f61ec45eSEric Nelson 22793f85ce27Swdenk- SystemACE Support: 22803f85ce27Swdenk CONFIG_SYSTEMACE 22813f85ce27Swdenk 22823f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 22833f85ce27Swdenk chips attached via some sort of local bus. The address 228411ccc33fSMarcel Ziswiler of the chip must also be defined in the 22856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 22863f85ce27Swdenk 22873f85ce27Swdenk #define CONFIG_SYSTEMACE 22886d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 22893f85ce27Swdenk 22903f85ce27Swdenk When SystemACE support is added, the "ace" device type 22913f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 22923f85ce27Swdenk 2293ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2294ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2295ecb0ccd9SWolfgang Denk 229628cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2297ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 229828cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2299ecb0ccd9SWolfgang Denk number generator is used. 2300ecb0ccd9SWolfgang Denk 230128cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 230228cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 230328cb9375SWolfgang Denk defined, the normal port 69 is used. 230428cb9375SWolfgang Denk 230528cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2306ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2307ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2308ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2309ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2310ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2311ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2312ecb0ccd9SWolfgang Denk 2313a8c7c708Swdenk- Show boot progress: 2314c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2315c609719bSwdenk 2316c609719bSwdenk Defining this option allows to add some board- 2317c609719bSwdenk specific code (calling a user-provided function 2318c609719bSwdenk "show_boot_progress(int)") that enables you to show 2319c609719bSwdenk the system's boot progress on some display (for 2320c609719bSwdenk example, some LED's) on your board. At the moment, 2321c609719bSwdenk the following checkpoints are implemented: 2322c609719bSwdenk 23233a608ca0SSimon Glass- Detailed boot stage timing 23243a608ca0SSimon Glass CONFIG_BOOTSTAGE 23253a608ca0SSimon Glass Define this option to get detailed timing of each stage 23263a608ca0SSimon Glass of the boot process. 23273a608ca0SSimon Glass 23283a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 23293a608ca0SSimon Glass This is the number of available user bootstage records. 23303a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 23313a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 23323a608ca0SSimon Glass the limit, recording will stop. 23333a608ca0SSimon Glass 23343a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 23353a608ca0SSimon Glass Define this to print a report before boot, similar to this: 23363a608ca0SSimon Glass 23373a608ca0SSimon Glass Timer summary in microseconds: 23383a608ca0SSimon Glass Mark Elapsed Stage 23393a608ca0SSimon Glass 0 0 reset 23403a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 23413a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 23423a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 23433a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 23443a608ca0SSimon Glass 3,910,375 250,777 main_loop 23453a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 23463a608ca0SSimon Glass 30,361,327 445,160 start_kernel 23473a608ca0SSimon Glass 23481372cce2SMarian BalakowiczLegacy uImage format: 23491372cce2SMarian Balakowicz 2350c609719bSwdenk Arg Where When 2351c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2352c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2353c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2354c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2355c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2356c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2357c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2358c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2359c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 23601372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2361c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2362c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2363c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2364c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 23651372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2366c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 23671372cce2SMarian Balakowicz 23681372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 23691372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 23701372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 23711372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 23721372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 23731372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 23741372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 237511ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 23761372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 23771372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 23781372cce2SMarian Balakowicz 2379ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2380c609719bSwdenk 2381a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 238263e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 238363e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 238463e73c9aSwdenk 2385566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2386566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2387566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2388566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2389566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2390566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2391566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2392566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2393566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2394566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2395566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2396566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2397566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2398566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2399566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2400566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2401566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2402566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2403566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2404566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2405566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2406566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2407566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2408566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2409566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2410566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2411566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2412566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2413566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2414566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2415566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2416566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2417566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2418566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2419566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2420566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2421566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2422566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2423566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2424566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2425566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2426566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2427566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2428566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2429566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2430566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2431566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2432c609719bSwdenk 2433566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2434c609719bSwdenk 2435566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2436566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2437566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2438206c60cbSwdenk 2439566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2440566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 244111ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2442566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2443566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2444566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 244574de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 244674de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2447566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2448c609719bSwdenk 24491372cce2SMarian BalakowiczFIT uImage format: 24501372cce2SMarian Balakowicz 24511372cce2SMarian Balakowicz Arg Where When 24521372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 24531372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 24541372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 24551372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 24561372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 24571372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2458f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 24591372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 24601372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 24611372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 24621372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 24631372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 246411ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 246511ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 24661372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 24671372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 24681372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 24691372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 24701372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 24711372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 24721372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 24731372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 24741372cce2SMarian Balakowicz 24751372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 24761372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 24771372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 247811ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 24791372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 24801372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 24811372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 24821372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 24831372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 24841372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 24851372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 24861372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 24871372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 24881372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 24891372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 24901372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 24911372cce2SMarian Balakowicz 249211ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 24931372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 24941372cce2SMarian Balakowicz 249511ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 24961372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 24971372cce2SMarian Balakowicz 249811ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 24991372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 25001372cce2SMarian Balakowicz 25014cf2609bSWolfgang Denk- Standalone program support: 25024cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 25034cf2609bSWolfgang Denk 25046feff899SWolfgang Denk This option defines a board specific value for the 25056feff899SWolfgang Denk address where standalone program gets loaded, thus 25066feff899SWolfgang Denk overwriting the architecture dependent default 25074cf2609bSWolfgang Denk settings. 25084cf2609bSWolfgang Denk 25094cf2609bSWolfgang Denk- Frame Buffer Address: 25104cf2609bSWolfgang Denk CONFIG_FB_ADDR 25114cf2609bSWolfgang Denk 25124cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 25134cf2609bSWolfgang Denk address for frame buffer. 25144cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 25154cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 25166feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 25174cf2609bSWolfgang Denk 25184cf2609bSWolfgang Denk Please see board_init_f function. 25194cf2609bSWolfgang Denk 2520cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2521cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2522cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2523cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2524cccfc2abSDetlev Zundel 2525cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2526cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2527cccfc2abSDetlev Zundel 2528cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2529cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2530cccfc2abSDetlev Zundel 2531cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2532cccfc2abSDetlev Zundel Needed for mtdparts command support. 2533cccfc2abSDetlev Zundel 2534cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2535cccfc2abSDetlev Zundel 2536cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2537cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2538cccfc2abSDetlev Zundel 25396a11cf48SDaniel Schwierzeck- SPL framework 25406a11cf48SDaniel Schwierzeck CONFIG_SPL 25416a11cf48SDaniel Schwierzeck Enable building of SPL globally. 25426a11cf48SDaniel Schwierzeck 254395579793STom Rini CONFIG_SPL_LDSCRIPT 254495579793STom Rini LDSCRIPT for linking the SPL binary. 254595579793STom Rini 254695579793STom Rini CONFIG_SPL_MAX_SIZE 254795579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 254895579793STom Rini 25496a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 25506a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 25516a11cf48SDaniel Schwierzeck 255295579793STom Rini CONFIG_SPL_BSS_START_ADDR 255395579793STom Rini Link address for the BSS within the SPL binary. 255495579793STom Rini 255595579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 255695579793STom Rini Maximum binary size of the BSS section of the SPL binary. 255795579793STom Rini 255895579793STom Rini CONFIG_SPL_STACK 255995579793STom Rini Adress of the start of the stack SPL will use 256095579793STom Rini 256195579793STom Rini CONFIG_SYS_SPL_MALLOC_START 256295579793STom Rini Starting address of the malloc pool used in SPL. 256395579793STom Rini 256495579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 256595579793STom Rini The size of the malloc pool used in SPL. 25666a11cf48SDaniel Schwierzeck 25676a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 25686a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 25696a11cf48SDaniel Schwierzeck 25706a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 25716a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 25726a11cf48SDaniel Schwierzeck 25736a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 25746a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 25756a11cf48SDaniel Schwierzeck 25766a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 25776a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 25786a11cf48SDaniel Schwierzeck 25796a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 25806a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 25816a11cf48SDaniel Schwierzeck 258295579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 258395579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 258495579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 258595579793STom Rini Address, size and partition on the MMC to load U-Boot from 258695579793STom Rini when the MMC is being used in raw mode. 258795579793STom Rini 258895579793STom Rini CONFIG_SPL_FAT_SUPPORT 258995579793STom Rini Support for fs/fat/libfat.o in SPL binary 259095579793STom Rini 259195579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 259295579793STom Rini Filename to read to load U-Boot when reading from FAT 259395579793STom Rini 259495579793STom Rini CONFIG_SPL_NAND_SIMPLE 259595579793STom Rini Support for drivers/mtd/nand/libnand.o in SPL binary 259695579793STom Rini 259795579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 259895579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 259995579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 260095579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 260195579793STom Rini CONFIG_SYS_NAND_ECCBYTES 260295579793STom Rini Defines the size and behavior of the NAND that SPL uses 260395579793STom Rini to read U-Boot with CONFIG_SPL_NAND_SIMPLE 260495579793STom Rini 260595579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 260695579793STom Rini Location in NAND for CONFIG_SPL_NAND_SIMPLE to read U-Boot 260795579793STom Rini from. 260895579793STom Rini 260995579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 261095579793STom Rini Location in memory for CONFIG_SPL_NAND_SIMPLE to load U-Boot 261195579793STom Rini to. 261295579793STom Rini 261395579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 261495579793STom Rini Define this if you need to first read the OOB and then the 261595579793STom Rini data. This is used for example on davinci plattforms. 261695579793STom Rini 261795579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 261895579793STom Rini Support for an OMAP3-specific set of functions to return the 261995579793STom Rini ID and MFR of the first attached NAND chip, if present. 262095579793STom Rini 26216a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 26226a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 26236a11cf48SDaniel Schwierzeck 26246a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 26256a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 26266a11cf48SDaniel Schwierzeck 26276a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 26286a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 26296a11cf48SDaniel Schwierzeck 26306a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 26316a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 26321372cce2SMarian Balakowicz 2633c609719bSwdenkModem Support: 2634c609719bSwdenk-------------- 2635c609719bSwdenk 2636566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2637c609719bSwdenk 263811ccc33fSMarcel Ziswiler- Modem support enable: 2639c609719bSwdenk CONFIG_MODEM_SUPPORT 2640c609719bSwdenk 2641c609719bSwdenk- RTS/CTS Flow control enable: 2642c609719bSwdenk CONFIG_HWFLOW 2643c609719bSwdenk 2644c609719bSwdenk- Modem debug support: 2645c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2646c609719bSwdenk 2647c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2648c609719bSwdenk for modem support. Useful only with BDI2000. 2649c609719bSwdenk 2650a8c7c708Swdenk- Interrupt support (PPC): 2651a8c7c708Swdenk 2652a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2653a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 265411ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2655a8c7c708Swdenk should set decrementer_count to appropriate value. If 265611ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2657a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 265811ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2659a8c7c708Swdenk specific handling. If board has watchdog / status_led 2660a8c7c708Swdenk / other_activity_monitor it works automatically from 2661a8c7c708Swdenk general timer_interrupt(). 2662a8c7c708Swdenk 2663c609719bSwdenk- General: 2664c609719bSwdenk 2665c609719bSwdenk In the target system modem support is enabled when a 2666c609719bSwdenk specific key (key combination) is pressed during 2667c609719bSwdenk power-on. Otherwise U-Boot will boot normally 266811ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2669c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2670c609719bSwdenk function, returning 1 and thus enabling modem 2671c609719bSwdenk initialization. 2672c609719bSwdenk 2673c609719bSwdenk If there are no modem init strings in the 2674c609719bSwdenk environment, U-Boot proceed to autoboot; the 2675c609719bSwdenk previous output (banner, info printfs) will be 267611ccc33fSMarcel Ziswiler suppressed, though. 2677c609719bSwdenk 2678c609719bSwdenk See also: doc/README.Modem 2679c609719bSwdenk 26809660e442SHelmut RaigerBoard initialization settings: 26819660e442SHelmut Raiger------------------------------ 26829660e442SHelmut Raiger 26839660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 26849660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 26859660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 26869660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 26879660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 26889660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 26899660e442SHelmut Raiger 26909660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 26919660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 26929660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 26939660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2694c609719bSwdenk 2695c609719bSwdenkConfiguration Settings: 2696c609719bSwdenk----------------------- 2697c609719bSwdenk 26986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2699c609719bSwdenk undefine this when you're short of memory. 2700c609719bSwdenk 27012fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 27022fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 27032fb2604dSPeter Tyser 27046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2705c609719bSwdenk prompt for user input. 2706c609719bSwdenk 27076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2708c609719bSwdenk 27096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2710c609719bSwdenk 27116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2712c609719bSwdenk 27136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2714c609719bSwdenk the application (usually a Linux kernel) when it is 2715c609719bSwdenk booted 2716c609719bSwdenk 27176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2718c609719bSwdenk List of legal baudrate settings for this board. 2719c609719bSwdenk 27206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2721c609719bSwdenk Suppress display of console information at boot. 2722c609719bSwdenk 27236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2724c609719bSwdenk If the board specific function 2725c609719bSwdenk extern int overwrite_console (void); 2726c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2727c609719bSwdenk serial port, else the settings in the environment are used. 2728c609719bSwdenk 27296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2730c609719bSwdenk Enable the call to overwrite_console(). 2731c609719bSwdenk 27326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2733c609719bSwdenk Enable overwrite of previous console environment settings. 2734c609719bSwdenk 27356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2736c609719bSwdenk Begin and End addresses of the area used by the 2737c609719bSwdenk simple memory test. 2738c609719bSwdenk 27396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2740c609719bSwdenk Enable an alternate, more extensive memory test. 2741c609719bSwdenk 27426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 27435f535fe1Swdenk Scratch address used by the alternate memory test 27445f535fe1Swdenk You only need to set this if address zero isn't writeable 27455f535fe1Swdenk 27466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 27476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 274814f73ca6SStefan Roese this specified memory area will get subtracted from the top 274911ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 275014f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 275114f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 275214f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 27535e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 275414f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 27555e12e75dSStefan Roese will have to get fixed in Linux additionally. 275614f73ca6SStefan Roese 275714f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 275814f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 275914f73ca6SStefan Roese be touched. 276014f73ca6SStefan Roese 276114f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 276214f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 276314f73ca6SStefan Roese then the end address of the Linux memory will be located at a 276414f73ca6SStefan Roese non page size aligned address and this could cause major 276514f73ca6SStefan Roese problems. 276614f73ca6SStefan Roese 27676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2768c609719bSwdenk Default load address for network file downloads 2769c609719bSwdenk 27706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2771c609719bSwdenk Enable temporary baudrate change while serial download 2772c609719bSwdenk 27736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2774c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2775c609719bSwdenk 27766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2777c609719bSwdenk Physical start address of Motherboard I/O (if using a 2778c609719bSwdenk Cogent motherboard) 2779c609719bSwdenk 27806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2781c609719bSwdenk Physical start address of Flash memory. 2782c609719bSwdenk 27836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2784c609719bSwdenk Physical start address of boot monitor code (set by 2785c609719bSwdenk make config files to be same as the text base address 278614d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 27876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2788c609719bSwdenk 27896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 27903b57fe0aSwdenk Size of memory reserved for monitor code, used to 27913b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 27923b57fe0aSwdenk embedded within the U-Boot image, or in a separate 27933b57fe0aSwdenk flash sector. 2794c609719bSwdenk 27956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2796c609719bSwdenk Size of DRAM reserved for malloc() use. 2797c609719bSwdenk 27986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 279915940c9aSStefan Roese Normally compressed uImages are limited to an 280015940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 28016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 280215940c9aSStefan Roese to adjust this setting to your needs. 2803c609719bSwdenk 28046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2805c609719bSwdenk Maximum size of memory mapped by the startup code of 2806c609719bSwdenk the Linux kernel; all data that must be processed by 28077d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 28087d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 28097d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 28107d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2811c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2812c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2813c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2814c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2815c609719bSwdenk 2816fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2817fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2818fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2819fca43cc8SJohn Rigby is enabled. 2820fca43cc8SJohn Rigby 2821fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2822fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2823fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2824fca43cc8SJohn Rigby 2825fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2826fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2827fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2828fca43cc8SJohn Rigby 28296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2830c609719bSwdenk Max number of Flash memory banks 2831c609719bSwdenk 28326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2833c609719bSwdenk Max number of sectors on a Flash chip 2834c609719bSwdenk 28356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2836c609719bSwdenk Timeout for Flash erase operations (in ms) 2837c609719bSwdenk 28386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2839c609719bSwdenk Timeout for Flash write operations (in ms) 2840c609719bSwdenk 28416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 28428564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 28438564acf9Swdenk 28446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 28458564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 28468564acf9Swdenk 28476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 28488564acf9Swdenk If defined, hardware flash sectors protection is used 28498564acf9Swdenk instead of U-Boot software protection. 28508564acf9Swdenk 28516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2852c609719bSwdenk 2853c609719bSwdenk Enable TFTP transfers directly to flash memory; 2854c609719bSwdenk without this option such a download has to be 2855c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2856c609719bSwdenk copy from RAM to flash. 2857c609719bSwdenk 2858c609719bSwdenk The two-step approach is usually more reliable, since 2859c609719bSwdenk you can check if the download worked before you erase 286011ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 286111ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2862c609719bSwdenk downloaded image) this option may be very useful. 2863c609719bSwdenk 28646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2865c609719bSwdenk Define if the flash driver uses extra elements in the 28665653fc33Swdenk common flash structure for storing flash geometry. 28675653fc33Swdenk 286800b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 28695653fc33Swdenk This option also enables the building of the cfi_flash driver 28705653fc33Swdenk in the drivers directory 287153cf9435Sstroese 287291809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 287391809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 287491809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 287591809ed5SPiotr Ziecik to the MTD layer. 287691809ed5SPiotr Ziecik 28776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 287896ef831fSGuennadi Liakhovetski Use buffered writes to flash. 287996ef831fSGuennadi Liakhovetski 288096ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 288196ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 288296ef831fSGuennadi Liakhovetski write commands. 288396ef831fSGuennadi Liakhovetski 28846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 28855568e613SStefan Roese If this option is defined, the common CFI flash doesn't 28865568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 28875568e613SStefan Roese is useful, if some of the configured banks are only 28885568e613SStefan Roese optionally available. 28895568e613SStefan Roese 28909a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 28919a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 28929a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 28939a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 28949a042e9cSJerry Van Baren 28956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 289611ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 289711ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 289853cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 289953cf9435Sstroese buffers can be full shortly after enabling the interface 290011ccc33fSMarcel Ziswiler on high Ethernet traffic. 290153cf9435Sstroese Defaults to 4 if not defined. 2902c609719bSwdenk 2903ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2904ea882bafSWolfgang Denk 2905ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2906ea882bafSWolfgang Denk internally to store the environment settings. The default 2907ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2908ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2909ea882bafSWolfgang Denk lib/hashtable.c for details. 2910ea882bafSWolfgang Denk 2911c609719bSwdenkThe following definitions that deal with the placement and management 2912c609719bSwdenkof environment data (variable area); in general, we support the 2913c609719bSwdenkfollowing configurations: 2914c609719bSwdenk 2915c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2916c3eb3fe4SMike Frysinger 2917c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2918c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2919c3eb3fe4SMike Frysinger 29205a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2921c609719bSwdenk 2922c609719bSwdenk Define this if the environment is in flash memory. 2923c609719bSwdenk 2924c609719bSwdenk a) The environment occupies one whole flash sector, which is 2925c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2926c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2927c609719bSwdenk sector" type flash chips, which have several smaller 2928c609719bSwdenk sectors at the start or the end. For instance, such a 2929c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2930c609719bSwdenk such a case you would place the environment in one of the 2931c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2932c609719bSwdenk "top boot sector" type flash chips, you would put the 2933c609719bSwdenk environment in one of the last sectors, leaving a gap 2934c609719bSwdenk between U-Boot and the environment. 2935c609719bSwdenk 29360e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2937c609719bSwdenk 2938c609719bSwdenk Offset of environment data (variable area) to the 2939c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2940c609719bSwdenk type flash chips the second sector can be used: the offset 2941c609719bSwdenk for this sector is given here. 2942c609719bSwdenk 29436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2944c609719bSwdenk 29450e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2946c609719bSwdenk 2947c609719bSwdenk This is just another way to specify the start address of 2948c609719bSwdenk the flash sector containing the environment (instead of 29490e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2950c609719bSwdenk 29510e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2952c609719bSwdenk 2953c609719bSwdenk Size of the sector containing the environment. 2954c609719bSwdenk 2955c609719bSwdenk 2956c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2957c609719bSwdenk In such a case you don't want to spend a whole sector for 2958c609719bSwdenk the environment. 2959c609719bSwdenk 29600e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2961c609719bSwdenk 29625a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 29630e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2964c609719bSwdenk of this flash sector for the environment. This saves 2965c609719bSwdenk memory for the RAM copy of the environment. 2966c609719bSwdenk 2967c609719bSwdenk It may also save flash memory if you decide to use this 2968c609719bSwdenk when your environment is "embedded" within U-Boot code, 2969c609719bSwdenk since then the remainder of the flash sector could be used 2970c609719bSwdenk for U-Boot code. It should be pointed out that this is 2971c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2972c609719bSwdenk updating the environment in flash makes it always 2973c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2974c609719bSwdenk wrong before the contents has been restored from a copy in 2975c609719bSwdenk RAM, your target system will be dead. 2976c609719bSwdenk 29770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 29780e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2979c609719bSwdenk 2980c609719bSwdenk These settings describe a second storage area used to hold 298111ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 29823e38691eSwdenk a valid backup copy in case there is a power failure during 2983c609719bSwdenk a "saveenv" operation. 2984c609719bSwdenk 2985c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2986c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2987c609719bSwdenkaccordingly! 2988c609719bSwdenk 2989c609719bSwdenk 29909314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2991c609719bSwdenk 2992c609719bSwdenk Define this if you have some non-volatile memory device 2993c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2994c609719bSwdenk environment. 2995c609719bSwdenk 29960e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 29970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2998c609719bSwdenk 299911ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3000c609719bSwdenk want to use for environment. It is assumed that this memory 3001c609719bSwdenk can just be read and written to, without any special 3002c609719bSwdenk provision. 3003c609719bSwdenk 3004c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3005c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 300611ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3007c609719bSwdenkU-Boot will hang. 3008c609719bSwdenk 3009c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3010c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3011c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3012c609719bSwdenkto save the current settings. 3013c609719bSwdenk 3014c609719bSwdenk 3015bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3016c609719bSwdenk 3017c609719bSwdenk Use this if you have an EEPROM or similar serial access 3018c609719bSwdenk device and a driver for it. 3019c609719bSwdenk 30200e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 30210e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3022c609719bSwdenk 3023c609719bSwdenk These two #defines specify the offset and size of the 3024c609719bSwdenk environment area within the total memory of your EEPROM. 3025c609719bSwdenk 30266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3027c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3028c609719bSwdenk The default address is zero. 3029c609719bSwdenk 30306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3031c609719bSwdenk If defined, the number of bits used to address bytes in a 3032c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3033c609719bSwdenk would require six bits. 3034c609719bSwdenk 30356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3036c609719bSwdenk If defined, the number of milliseconds to delay between 3037c609719bSwdenk page writes. The default is zero milliseconds. 3038c609719bSwdenk 30396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3040c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3041c609719bSwdenk that this is NOT the chip address length! 3042c609719bSwdenk 30436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 30445cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 30455cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 30465cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 30475cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 30485cf91d6bSwdenk byte chips. 30495cf91d6bSwdenk 30505cf91d6bSwdenk Note that we consider the length of the address field to 30515cf91d6bSwdenk still be one byte because the extra address bits are hidden 30525cf91d6bSwdenk in the chip address. 30535cf91d6bSwdenk 30546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3055c609719bSwdenk The size in bytes of the EEPROM device. 3056c609719bSwdenk 3057548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3058548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3059548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3060548738b4SHeiko Schocher 3061548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3062548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3063548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3064548738b4SHeiko Schocher EEPROM. For example: 3065548738b4SHeiko Schocher 3066548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3067548738b4SHeiko Schocher 3068548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3069548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3070c609719bSwdenk 3071057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 30725779d8d9Swdenk 30735779d8d9Swdenk Define this if you have a DataFlash memory device which you 30745779d8d9Swdenk want to use for the environment. 30755779d8d9Swdenk 30760e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 30770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 30780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 30795779d8d9Swdenk 30805779d8d9Swdenk These three #defines specify the offset and size of the 30815779d8d9Swdenk environment area within the total memory of your DataFlash placed 30825779d8d9Swdenk at the specified address. 30835779d8d9Swdenk 30840a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 30850a85a9e7SLiu Gang 30860a85a9e7SLiu Gang Define this if you have a remote memory space which you 30870a85a9e7SLiu Gang want to use for the local device's environment. 30880a85a9e7SLiu Gang 30890a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 30900a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 30910a85a9e7SLiu Gang 30920a85a9e7SLiu Gang These two #defines specify the address and size of the 30930a85a9e7SLiu Gang environment area within the remote memory space. The 30940a85a9e7SLiu Gang local device can get the environment from remote memory 3095*fc54c7faSLiu Gang space by SRIO or PCIE links. 30960a85a9e7SLiu Gang 30970a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 30980a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3099*fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3100*fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 31010a85a9e7SLiu Gang 310251bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 310313a5695bSwdenk 310413a5695bSwdenk Define this if you have a NAND device which you want to use 310513a5695bSwdenk for the environment. 310613a5695bSwdenk 31070e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 31080e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 310913a5695bSwdenk 311013a5695bSwdenk These two #defines specify the offset and size of the environment 3111fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3112fdd813deSScott Wood aligned to an erase block boundary. 31135779d8d9Swdenk 3114fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3115e443c944SMarkus Klotzbuecher 31160e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3117fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3118fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3119fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3120fdd813deSScott Wood aligned to an erase block boundary. 3121e443c944SMarkus Klotzbuecher 3122fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3123fdd813deSScott Wood 3124fdd813deSScott Wood Specifies the length of the region in which the environment 3125fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3126fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3127fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3128fdd813deSScott Wood the range to be avoided. 3129fdd813deSScott Wood 3130fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3131fdd813deSScott Wood 3132fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3133fdd813deSScott Wood environment from block zero's out-of-band data. The 3134fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3135fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3136fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3137e443c944SMarkus Klotzbuecher 3138b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3139b74ab737SGuennadi Liakhovetski 3140b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3141b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3142b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3143b74ab737SGuennadi Liakhovetski 31446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3145c609719bSwdenk 3146c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3147c609719bSwdenk area is used at an early stage (ROM part) if the environment 3148c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3149c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3150c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3151c609719bSwdenk to be a good choice since it makes it far enough from the 3152c609719bSwdenk start of the data area as well as from the stack pointer. 3153c609719bSwdenk 3154e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3155c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3156cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3157c609719bSwdenkuntil then to read environment variables. 3158c609719bSwdenk 315985ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 316085ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 316185ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 316285ec0bccSwdenknecessary, because the first environment variable we need is the 316385ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 316485ec0bccSwdenkhave any device yet where we could complain.] 3165c609719bSwdenk 3166c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3167c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 316885ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3169c609719bSwdenk 31706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3171fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3172fc3e2165Swdenk 31736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3174fc3e2165Swdenk also needs to be defined. 3175fc3e2165Swdenk 31766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3177fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3178c609719bSwdenk 3179f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3180f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3181f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3182f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3183f5675aa5SRon Madrid space for already greatly restricted images, including but not 3184f5675aa5SRon Madrid limited to NAND_SPL configurations. 3185f5675aa5SRon Madrid 3186c609719bSwdenkLow Level (hardware related) configuration options: 3187dc7c9a1aSwdenk--------------------------------------------------- 3188c609719bSwdenk 31896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3190c609719bSwdenk Cache Line Size of the CPU. 3191c609719bSwdenk 31926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3193c609719bSwdenk Default address of the IMMR after system reset. 31942535d602Swdenk 31952535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 31962535d602Swdenk and RPXsuper) to be able to adjust the position of 31972535d602Swdenk the IMMR register after a reset. 3198c609719bSwdenk 3199e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3200e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3201e46fedfeSTimur Tabi PowerPC SOCs. 3202e46fedfeSTimur Tabi 3203e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3204e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3205e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3206e46fedfeSTimur Tabi 3207e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3208e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3209e46fedfeSTimur Tabi 3210e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3211e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3212e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3213e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3214e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3215e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3216e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3217e46fedfeSTimur Tabi 3218e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3219e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3220e46fedfeSTimur Tabi 3221e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3222e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3223e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3224e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3225e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3226e46fedfeSTimur Tabi 3227e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3228e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3229e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3230e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3231e46fedfeSTimur Tabi 3232e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3233e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3234e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3235e46fedfeSTimur Tabi 32367f6c2cbcSwdenk- Floppy Disk Support: 32376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 32387f6c2cbcSwdenk 32397f6c2cbcSwdenk the default drive number (default value 0) 32407f6c2cbcSwdenk 32416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 32427f6c2cbcSwdenk 324311ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 32447f6c2cbcSwdenk (default value 1) 32457f6c2cbcSwdenk 32466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 32477f6c2cbcSwdenk 32487f6c2cbcSwdenk defines the offset of register from address. It 32497f6c2cbcSwdenk depends on which part of the data bus is connected to 325011ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 32517f6c2cbcSwdenk 32526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 32536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 32547f6c2cbcSwdenk default value. 32557f6c2cbcSwdenk 32566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 32577f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 32587f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 32597f6c2cbcSwdenk source code. It is used to make hardware dependant 32607f6c2cbcSwdenk initializations. 32617f6c2cbcSwdenk 32620abddf82SMacpaul Lin- CONFIG_IDE_AHB: 32630abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 32640abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 32650abddf82SMacpaul Lin When software is doing ATA command and data transfer to 32660abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 32670abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 32680abddf82SMacpaul Lin is requierd. 32690abddf82SMacpaul Lin 32706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 327125d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 327225d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3273c609719bSwdenk 32746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3275c609719bSwdenk 32767152b1d0Swdenk Start address of memory area that can be used for 3277c609719bSwdenk initial data and stack; please note that this must be 3278c609719bSwdenk writable memory that is working WITHOUT special 3279c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3280c609719bSwdenk will become available only after programming the 3281c609719bSwdenk memory controller and running certain initialization 3282c609719bSwdenk sequences. 3283c609719bSwdenk 3284c609719bSwdenk U-Boot uses the following memory types: 3285c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3286c609719bSwdenk - MPC824X: data cache 3287c609719bSwdenk - PPC4xx: data cache 3288c609719bSwdenk 32896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3290c609719bSwdenk 3291c609719bSwdenk Offset of the initial data structure in the memory 32926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 32936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3294c609719bSwdenk data is located at the end of the available space 3295553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 32966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 32976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 32986d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3299c609719bSwdenk 3300c609719bSwdenk Note: 3301c609719bSwdenk On the MPC824X (or other systems that use the data 3302c609719bSwdenk cache for initial memory) the address chosen for 33036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3304c609719bSwdenk point to an otherwise UNUSED address space between 3305c609719bSwdenk the top of RAM and the start of the PCI space. 3306c609719bSwdenk 33076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3308c609719bSwdenk 33096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3310c609719bSwdenk 33116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3312c609719bSwdenk 33136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3314c609719bSwdenk 33156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3316c609719bSwdenk 33176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3318c609719bSwdenk 33196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3320c609719bSwdenk SDRAM timing 3321c609719bSwdenk 33226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3323c609719bSwdenk periodic timer for refresh 3324c609719bSwdenk 33256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3326c609719bSwdenk 33276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 33286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 33296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 33306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3331c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3332c609719bSwdenk 3333c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 33346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 33356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3336c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3337c609719bSwdenk 33386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 33396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3340c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3341c609719bSwdenk Prescaler definitions (SDRAM timing) 3342c609719bSwdenk 33436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3344c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3345c609719bSwdenk define relocation offset in DPRAM [DSP2] 3346c609719bSwdenk 33476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3348b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3349b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3350b423d055SHeiko Schocher 33516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3352c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3353c609719bSwdenk define relocation offset in DPRAM [SCC4] 3354c609719bSwdenk 33556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3356c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3357c609719bSwdenk wrong setting might damage your board. Read 3358c609719bSwdenk doc/README.MBX before setting this variable! 3359c609719bSwdenk 33606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3361ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3362ea909b76Swdenk (Power On Self Tests). This definition overrides 3363ea909b76Swdenk #define'd default value in commproc.h resp. 3364ea909b76Swdenk cpm_8260.h. 3365ea909b76Swdenk 33666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 33676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 33686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 33696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 33706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 33716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 33726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 33736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3374a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 33755d232d0eSwdenk 33769cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 33779cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 33789cacf4fcSDirk Eibach required. 33799cacf4fcSDirk Eibach 3380a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3381a09b9b68SKumar Gala Chip has SRIO or not 3382a09b9b68SKumar Gala 3383a09b9b68SKumar Gala- CONFIG_SRIO1: 3384a09b9b68SKumar Gala Board has SRIO 1 port available 3385a09b9b68SKumar Gala 3386a09b9b68SKumar Gala- CONFIG_SRIO2: 3387a09b9b68SKumar Gala Board has SRIO 2 port available 3388a09b9b68SKumar Gala 3389a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3390a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3391a09b9b68SKumar Gala 3392a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3393a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3394a09b9b68SKumar Gala 3395a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3396a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3397a09b9b68SKumar Gala 3398eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3399eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3400eced4626SAlex Waterman 16 bit bus. 3401eced4626SAlex Waterman 3402eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3403eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3404eced4626SAlex Waterman a default value will be used. 3405eced4626SAlex Waterman 3406bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3407218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3408218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3409218ca724SWolfgang Denk 3410bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3411bb99ad6dSBen Warren I2C address of the SPD EEPROM 3412bb99ad6dSBen Warren 34136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3414218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3415218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3416218ca724SWolfgang Denk to something your driver can deal with. 3417bb99ad6dSBen Warren 34181b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 34191b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 34201b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 34211b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 34221b3e3c4fSYork Sun header files or board specific files. 34231b3e3c4fSYork Sun 34246f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 34256f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 34266f5e1dc5SYork Sun 34276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3428218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3429218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 34302ad6b513STimur Tabi 3431c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3432c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3433c26e454dSwdenk 3434c26e454dSwdenk- CONFIG_FEC[12]_PHY 3435c26e454dSwdenk Define to the hardcoded PHY address which corresponds 34366e592385Swdenk to the given FEC; i. e. 3437c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3438c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3439c26e454dSwdenk 3440c26e454dSwdenk When set to -1, means to probe for first available. 3441c26e454dSwdenk 3442c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3443c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3444c26e454dSwdenk (so program the FEC to ignore it). 3445c26e454dSwdenk 3446c26e454dSwdenk- CONFIG_RMII 3447c26e454dSwdenk Enable RMII mode for all FECs. 3448c26e454dSwdenk Note that this is a global option, we can't 3449c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3450c26e454dSwdenk 34515cf91d6bSwdenk- CONFIG_CRC32_VERIFY 34525cf91d6bSwdenk Add a verify option to the crc32 command. 34535cf91d6bSwdenk The syntax is: 34545cf91d6bSwdenk 34555cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 34565cf91d6bSwdenk 34575cf91d6bSwdenk Where address/count indicate a memory area 34585cf91d6bSwdenk and crc32 is the correct crc32 which the 34595cf91d6bSwdenk area should have. 34605cf91d6bSwdenk 346156523f12Swdenk- CONFIG_LOOPW 346256523f12Swdenk Add the "loopw" memory command. This only takes effect if 3463602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 346456523f12Swdenk 34657b466641Sstroese- CONFIG_MX_CYCLIC 34667b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 34677b466641Sstroese "md/mw" commands. 34687b466641Sstroese Examples: 34697b466641Sstroese 34707b466641Sstroese => mdc.b 10 4 500 34717b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 34727b466641Sstroese 34737b466641Sstroese => mwc.l 100 12345678 10 34747b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 34757b466641Sstroese 34767b466641Sstroese This only takes effect if the memory commands are activated 3477602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 34787b466641Sstroese 34798aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3480afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3481e03f3169SWolfgang Denk low level initializations (like setting up the memory 3482e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3483e03f3169SWolfgang Denk relocate itself into RAM. 34848aa1a2d1Swdenk 3485e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3486e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3487e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3488e03f3169SWolfgang Denk these initializations itself. 34898aa1a2d1Swdenk 3490401bb30bSAneesh V- CONFIG_SPL_BUILD 3491df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3492df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3493df81238bSMagnus Lilja compiling a NAND SPL. 3494400558b5Swdenk 3495d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3496d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3497d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3498d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3499d8834a13SMatthias Weisser conditions but may increase the binary size. 3500d8834a13SMatthias Weisser 3501f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3502f2717b47STimur Tabi----------------------------------- 3503f2717b47STimur Tabi 3504f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3505f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3506f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3507f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3508f2717b47STimur Tabiwithin that device. 3509f2717b47STimur Tabi 3510f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3511f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3512f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3513f2717b47STimur Tabi is also specified. 3514f2717b47STimur Tabi 3515f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3516f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3517f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3518f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3519f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3520f2717b47STimur Tabi 3521f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3522f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3523f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3524f2717b47STimur Tabi virtual address in NOR flash. 3525f2717b47STimur Tabi 3526f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3527f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3528f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3529f2717b47STimur Tabi 3530f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3531f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3532f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3533f2717b47STimur Tabi 3534f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3535f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3536f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3537f2717b47STimur Tabi 3538292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3539292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3540292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3541*fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3542*fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3543*fc54c7faSLiu Gang master's memory space. 3544f2717b47STimur Tabi 3545c609719bSwdenkBuilding the Software: 3546c609719bSwdenk====================== 3547c609719bSwdenk 3548218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3549218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3550218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3551218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3552218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3553218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3554c609719bSwdenk 3555218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3556218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3557218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3558218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3559218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3560c609719bSwdenk 3561218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3562218ca724SWolfgang Denk $ export CROSS_COMPILE 3563c609719bSwdenk 35642f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 35652f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 35662f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 35672f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 35682f8d396bSPeter Tyser 35692f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 35702f8d396bSPeter Tyser 35712f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 35722f8d396bSPeter Tyser be executed on computers running Windows. 35732f8d396bSPeter Tyser 3574c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3575c609719bSwdenksources you must configure U-Boot for one specific board type. This 3576c609719bSwdenkis done by typing: 3577c609719bSwdenk 3578c609719bSwdenk make NAME_config 3579c609719bSwdenk 3580218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 35814d675ae6SMichael Jonesrations; see boards.cfg for supported names. 358254387ac9Swdenk 3583c609719bSwdenkNote: for some board special configuration names may exist; check if 3584c609719bSwdenk additional information is available from the board vendor; for 35852729af9dSwdenk instance, the TQM823L systems are available without (standard) 35862729af9dSwdenk or with LCD support. You can select such additional "features" 358711ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3588c609719bSwdenk 35892729af9dSwdenk make TQM823L_config 35902729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3591c609719bSwdenk 3592c609719bSwdenk make TQM823L_LCD_config 3593c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3594c609719bSwdenk 3595c609719bSwdenk etc. 3596c609719bSwdenk 3597c609719bSwdenk 3598c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 35997152b1d0Swdenkimages ready for download to / installation on your system: 3600c609719bSwdenk 3601c609719bSwdenk- "u-boot.bin" is a raw binary image 3602c609719bSwdenk- "u-boot" is an image in ELF binary format 3603c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3604c609719bSwdenk 3605baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3606baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3607baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3608baf31249SMarian Balakowicz 3609baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3610baf31249SMarian Balakowicz 3611baf31249SMarian Balakowicz make O=/tmp/build distclean 3612baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3613baf31249SMarian Balakowicz make O=/tmp/build all 3614baf31249SMarian Balakowicz 3615baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3616baf31249SMarian Balakowicz 3617baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3618baf31249SMarian Balakowicz make distclean 3619baf31249SMarian Balakowicz make NAME_config 3620baf31249SMarian Balakowicz make all 3621baf31249SMarian Balakowicz 3622baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3623baf31249SMarian Balakowiczvariable. 3624baf31249SMarian Balakowicz 3625c609719bSwdenk 3626c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3627c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3628c609719bSwdenknative "make". 3629c609719bSwdenk 3630c609719bSwdenk 3631c609719bSwdenkIf the system board that you have is not listed, then you will need 3632c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3633c609719bSwdenksteps: 3634c609719bSwdenk 3635c609719bSwdenk1. Add a new configuration option for your board to the toplevel 36364d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 36374d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3638c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 363985ec0bccSwdenk files you need. In your board directory, you will need at least 364085ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 364185ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 364285ec0bccSwdenk your board 3643c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3644c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 364585ec0bccSwdenk4. Run "make <board>_config" with your new name. 3646c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3647c609719bSwdenk to be installed on your target system. 364885ec0bccSwdenk6. Debug and solve any problems that might arise. 3649c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3650c609719bSwdenk 3651c609719bSwdenk 3652c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3653c609719bSwdenk============================================================== 3654c609719bSwdenk 3655c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3656c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3657c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3658c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3659218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3660c609719bSwdenk 3661c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3662c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3663c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3664c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3665c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 36667152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3667218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3668218ca724SWolfgang Denkyou can type 3669c609719bSwdenk 3670c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3671c609719bSwdenk 3672c609719bSwdenkor to build on a native PowerPC system you can type 3673c609719bSwdenk 3674c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3675c609719bSwdenk 3676218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3677218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3678218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3679218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3680218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3681218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3682218ca724SWolfgang Denkvariable. For example: 3683baf31249SMarian Balakowicz 3684baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3685baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3686baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3687baf31249SMarian Balakowicz 3688218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3689218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3690218ca724SWolfgang Denkduring the whole build process. 3691baf31249SMarian Balakowicz 3692baf31249SMarian Balakowicz 3693c609719bSwdenkSee also "U-Boot Porting Guide" below. 3694c609719bSwdenk 3695c609719bSwdenk 3696c609719bSwdenkMonitor Commands - Overview: 3697c609719bSwdenk============================ 3698c609719bSwdenk 3699c609719bSwdenkgo - start application at address 'addr' 3700c609719bSwdenkrun - run commands in an environment variable 3701c609719bSwdenkbootm - boot application image from memory 3702c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 370344f074c7SMarek Vasutbootz - boot zImage from memory 3704c609719bSwdenktftpboot- boot image via network using TFTP protocol 3705c609719bSwdenk and env variables "ipaddr" and "serverip" 3706c609719bSwdenk (and eventually "gatewayip") 37071fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3708c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3709c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3710c609719bSwdenkloads - load S-Record file over serial line 3711c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3712c609719bSwdenkmd - memory display 3713c609719bSwdenkmm - memory modify (auto-incrementing) 3714c609719bSwdenknm - memory modify (constant address) 3715c609719bSwdenkmw - memory write (fill) 3716c609719bSwdenkcp - memory copy 3717c609719bSwdenkcmp - memory compare 3718c609719bSwdenkcrc32 - checksum calculation 37190f89c54bSPeter Tyseri2c - I2C sub-system 3720c609719bSwdenksspi - SPI utility commands 3721c609719bSwdenkbase - print or set address offset 3722c609719bSwdenkprintenv- print environment variables 3723c609719bSwdenksetenv - set environment variables 3724c609719bSwdenksaveenv - save environment variables to persistent storage 3725c609719bSwdenkprotect - enable or disable FLASH write protection 3726c609719bSwdenkerase - erase FLASH memory 3727c609719bSwdenkflinfo - print FLASH memory information 3728c609719bSwdenkbdinfo - print Board Info structure 3729c609719bSwdenkiminfo - print header information for application image 3730c609719bSwdenkconinfo - print console devices and informations 3731c609719bSwdenkide - IDE sub-system 3732c609719bSwdenkloop - infinite loop on address range 373356523f12Swdenkloopw - infinite write loop on address range 3734c609719bSwdenkmtest - simple RAM test 3735c609719bSwdenkicache - enable or disable instruction cache 3736c609719bSwdenkdcache - enable or disable data cache 3737c609719bSwdenkreset - Perform RESET of the CPU 3738c609719bSwdenkecho - echo args to console 3739c609719bSwdenkversion - print monitor version 3740c609719bSwdenkhelp - print online help 3741c609719bSwdenk? - alias for 'help' 3742c609719bSwdenk 3743c609719bSwdenk 3744c609719bSwdenkMonitor Commands - Detailed Description: 3745c609719bSwdenk======================================== 3746c609719bSwdenk 3747c609719bSwdenkTODO. 3748c609719bSwdenk 3749c609719bSwdenkFor now: just type "help <command>". 3750c609719bSwdenk 3751c609719bSwdenk 3752c609719bSwdenkEnvironment Variables: 3753c609719bSwdenk====================== 3754c609719bSwdenk 3755c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3756c609719bSwdenkcan be made persistent by saving to Flash memory. 3757c609719bSwdenk 3758c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3759c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3760c609719bSwdenkwithout a value can be used to delete a variable from the 3761c609719bSwdenkenvironment. As long as you don't save the environment you are 3762c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3763c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3764c609719bSwdenk 3765c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3766c96f86eeSWolfgang Denk 3767c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3768c609719bSwdenk 3769c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3770c609719bSwdenk 3771c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3772c609719bSwdenk 3773c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3774c609719bSwdenk 3775c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3776c609719bSwdenk 3777c609719bSwdenk bootfile - Name of the image to load with TFTP 3778c609719bSwdenk 37797d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 37807d721e34SBartlomiej Sieka command can be restricted. This variable is given as 37817d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 37827d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 37837d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 37847d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3785c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3786c3624e6eSGrant Likely bootm_mapsize. 3787c3624e6eSGrant Likely 3788c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3789c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3790c3624e6eSGrant Likely defines the size of the memory region starting at base 3791c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3792c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3793c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3794c3624e6eSGrant Likely used otherwise. 37957d721e34SBartlomiej Sieka 37967d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 37977d721e34SBartlomiej Sieka command can be restricted. This variable is given as 37987d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 37997d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 38007d721e34SBartlomiej Sieka environment variable. 38017d721e34SBartlomiej Sieka 38024bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 38034bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 38044bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 38054bae9090SBartlomiej Sieka 3806c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3807c609719bSwdenk "bootp" will just load perform a lookup of the 3808c609719bSwdenk configuration from the BOOTP server, but not try to 3809c609719bSwdenk load any image using TFTP 3810c609719bSwdenk 3811c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3812c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3813c609719bSwdenk be automatically started (by internally calling 3814c609719bSwdenk "bootm") 3815c609719bSwdenk 38164a6fd34bSwdenk If set to "no", a standalone image passed to the 38174a6fd34bSwdenk "bootm" command will be copied to the load address 38184a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 38194a6fd34bSwdenk This can be used to load and uncompress arbitrary 38204a6fd34bSwdenk data. 38214a6fd34bSwdenk 3822a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3823a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3824fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3825fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3826fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3827fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3828fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3829fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3830fa34f6b2SShawn Guo access it during the boot procedure. 3831fa34f6b2SShawn Guo 3832a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3833a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3834a28afca5SDavid A. Long to work it must reside in writable memory, have 3835a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3836a28afca5SDavid A. Long add the information it needs into it, and the memory 3837a28afca5SDavid A. Long must be accessible by the kernel. 3838a28afca5SDavid A. Long 3839eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3840eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3841eea63e05SSimon Glass defined. 3842eea63e05SSimon Glass 384317ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 384417ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 384517ea1177Swdenk mode (400kHZ). This environment variable is used in 384617ea1177Swdenk initialization code. So, for changes to be effective 384717ea1177Swdenk it must be saved and board must be reset. 384817ea1177Swdenk 3849c609719bSwdenk initrd_high - restrict positioning of initrd images: 3850c609719bSwdenk If this variable is not set, initrd images will be 3851c609719bSwdenk copied to the highest possible address in RAM; this 3852c609719bSwdenk is usually what you want since it allows for 3853c609719bSwdenk maximum initrd size. If for some reason you want to 3854c609719bSwdenk make sure that the initrd image is loaded below the 38556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3856c609719bSwdenk variable to a value of "no" or "off" or "0". 3857c609719bSwdenk Alternatively, you can set it to a maximum upper 3858c609719bSwdenk address to use (U-Boot will still check that it 3859c609719bSwdenk does not overwrite the U-Boot stack and data). 3860c609719bSwdenk 3861c609719bSwdenk For instance, when you have a system with 16 MB 38627152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3863c609719bSwdenk you can do this by adding "mem=12M" to the value of 3864c609719bSwdenk the "bootargs" variable. However, now you must make 38657152b1d0Swdenk sure that the initrd image is placed in the first 3866c609719bSwdenk 12 MB as well - this can be done with 3867c609719bSwdenk 3868c609719bSwdenk setenv initrd_high 00c00000 3869c609719bSwdenk 387038b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 387138b99261Swdenk indication to U-Boot that all addresses are legal 387238b99261Swdenk for the Linux kernel, including addresses in flash 387338b99261Swdenk memory. In this case U-Boot will NOT COPY the 387438b99261Swdenk ramdisk at all. This may be useful to reduce the 387538b99261Swdenk boot time on your system, but requires that this 387638b99261Swdenk feature is supported by your Linux kernel. 387738b99261Swdenk 3878c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3879c609719bSwdenk 3880c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3881dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3882c609719bSwdenk 3883c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3884c609719bSwdenk 3885c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3886c609719bSwdenk 3887c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3888c609719bSwdenk 3889c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3890c609719bSwdenk 3891c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3892c609719bSwdenk 3893e2a53458SMike Frysinger ethprime - controls which interface is used first. 3894a3d991bdSwdenk 3895e2a53458SMike Frysinger ethact - controls which interface is currently active. 3896e2a53458SMike Frysinger For example you can do the following 3897a3d991bdSwdenk 389848690d80SHeiko Schocher => setenv ethact FEC 389948690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 390048690d80SHeiko Schocher => setenv ethact SCC 390148690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3902a3d991bdSwdenk 3903e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3904e1692577SMatthias Fuchs available network interfaces. 3905e1692577SMatthias Fuchs It just stays at the currently selected interface. 3906e1692577SMatthias Fuchs 3907a3d991bdSwdenk netretry - When set to "no" each network operation will 3908a3d991bdSwdenk either succeed or fail without retrying. 39096e592385Swdenk When set to "once" the network operation will 39106e592385Swdenk fail when all the available network interfaces 39116e592385Swdenk are tried once without success. 3912a3d991bdSwdenk Useful on scripts which control the retry operation 3913a3d991bdSwdenk themselves. 3914a3d991bdSwdenk 3915b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3916a1cf027aSJean-Christophe PLAGNIOL-VILLARD 391728cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3918ecb0ccd9SWolfgang Denk UDP source port. 3919ecb0ccd9SWolfgang Denk 392028cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 392128cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 392228cb9375SWolfgang Denk 3923c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3924c96f86eeSWolfgang Denk we use the TFTP server's default block size 3925c96f86eeSWolfgang Denk 3926c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3927c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3928c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3929c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3930c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3931c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3932c96f86eeSWolfgang Denk with unreliable TFTP servers. 3933c96f86eeSWolfgang Denk 3934a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 393511ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3936a3d991bdSwdenk VLAN tagged frames. 3937c609719bSwdenk 3938dc0b7b0eSJason HobbsThe following image location variables contain the location of images 3939dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 3940dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 3941dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 3942dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 3943dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 3944dc0b7b0eSJason Hobbsflash or offset in NAND flash. 3945dc0b7b0eSJason Hobbs 3946dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 3947dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 3948dc0b7b0eSJason Hobbsboards use these variables for other purposes. 3949dc0b7b0eSJason Hobbs 3950dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 3951dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 3952dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 3953dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 3954dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 3955dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 3956dc0b7b0eSJason Hobbs 3957c609719bSwdenkThe following environment variables may be used and automatically 3958c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3959c609719bSwdenkdepending the information provided by your boot server: 3960c609719bSwdenk 3961c609719bSwdenk bootfile - see above 3962c609719bSwdenk dnsip - IP address of your Domain Name Server 3963fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3964c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3965c609719bSwdenk hostname - Target hostname 3966c609719bSwdenk ipaddr - see above 3967c609719bSwdenk netmask - Subnet Mask 3968c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3969c609719bSwdenk serverip - see above 3970c609719bSwdenk 3971c609719bSwdenk 3972c609719bSwdenkThere are two special Environment Variables: 3973c609719bSwdenk 3974c609719bSwdenk serial# - contains hardware identification information such 3975c609719bSwdenk as type string and/or serial number 3976c609719bSwdenk ethaddr - Ethernet address 3977c609719bSwdenk 3978c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3979c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3980c609719bSwdenkonce they have been set once. 3981c609719bSwdenk 3982c609719bSwdenk 3983c1551ea8SstroeseFurther special Environment Variables: 3984c1551ea8Sstroese 3985c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3986c1551ea8Sstroese with the "version" command. This variable is 3987c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3988c1551ea8Sstroese 3989c1551ea8Sstroese 3990c609719bSwdenkPlease note that changes to some configuration parameters may take 3991c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3992c609719bSwdenk 3993c609719bSwdenk 3994f07771ccSwdenkCommand Line Parsing: 3995f07771ccSwdenk===================== 3996f07771ccSwdenk 3997f07771ccSwdenkThere are two different command line parsers available with U-Boot: 39987152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3999f07771ccSwdenk 4000f07771ccSwdenkOld, simple command line parser: 4001f07771ccSwdenk-------------------------------- 4002f07771ccSwdenk 4003f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4004f07771ccSwdenk- several commands on one line, separated by ';' 4005fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4006f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4007f07771ccSwdenk for example: 4008fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4009f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4010f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4011f07771ccSwdenk 4012f07771ccSwdenkHush shell: 4013f07771ccSwdenk----------- 4014f07771ccSwdenk 4015f07771ccSwdenk- similar to Bourne shell, with control structures like 4016f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4017f07771ccSwdenk until...do...done, ... 4018f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4019f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4020f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4021f07771ccSwdenk command 4022f07771ccSwdenk 4023f07771ccSwdenkGeneral rules: 4024f07771ccSwdenk-------------- 4025f07771ccSwdenk 4026f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4027f07771ccSwdenk command) contains several commands separated by semicolon, and 4028f07771ccSwdenk one of these commands fails, then the remaining commands will be 4029f07771ccSwdenk executed anyway. 4030f07771ccSwdenk 4031f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 403211ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4033f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4034f07771ccSwdenk variables are not executed. 4035f07771ccSwdenk 4036c609719bSwdenkNote for Redundant Ethernet Interfaces: 4037c609719bSwdenk======================================= 4038c609719bSwdenk 403911ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4040c609719bSwdenksuch configurations and is capable of automatic selection of a 40417152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4042c609719bSwdenk 4043c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4044c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4045c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4046c609719bSwdenk 4047c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4048c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4049c609719bSwdenkding setting in the environment; if the corresponding environment 4050c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4051c609719bSwdenk 4052c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4053c609719bSwdenk environment, the SROM's address is used. 4054c609719bSwdenk 4055c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4056c609719bSwdenk environment exists, then the value from the environment variable is 4057c609719bSwdenk used. 4058c609719bSwdenk 4059c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4060c609719bSwdenk both addresses are the same, this MAC address is used. 4061c609719bSwdenk 4062c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4063c609719bSwdenk addresses differ, the value from the environment is used and a 4064c609719bSwdenk warning is printed. 4065c609719bSwdenk 4066c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4067c609719bSwdenk is raised. 4068c609719bSwdenk 4069ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4070ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4071ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4072ecee9324SBen WarrenThe naming convention is as follows: 4073ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4074c609719bSwdenk 4075c609719bSwdenkImage Formats: 4076c609719bSwdenk============== 4077c609719bSwdenk 40783310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 40793310c549SMarian Balakowiczimages in two formats: 40803310c549SMarian Balakowicz 40813310c549SMarian BalakowiczNew uImage format (FIT) 40823310c549SMarian Balakowicz----------------------- 40833310c549SMarian Balakowicz 40843310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 40853310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 40863310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 40873310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 40883310c549SMarian Balakowicz 40893310c549SMarian Balakowicz 40903310c549SMarian BalakowiczOld uImage format 40913310c549SMarian Balakowicz----------------- 40923310c549SMarian Balakowicz 40933310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 40943310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 40953310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4096c609719bSwdenk 4097c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4098c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4099f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4100f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4101f5ed9e39SPeter Tyser INTEGRITY). 41027b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4103afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4104afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4105c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4106c609719bSwdenk* Load Address 4107c609719bSwdenk* Entry Point 4108c609719bSwdenk* Image Name 4109c609719bSwdenk* Image Timestamp 4110c609719bSwdenk 4111c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4112c609719bSwdenkand the data portions of the image are secured against corruption by 4113c609719bSwdenkCRC32 checksums. 4114c609719bSwdenk 4115c609719bSwdenk 4116c609719bSwdenkLinux Support: 4117c609719bSwdenk============== 4118c609719bSwdenk 4119c609719bSwdenkAlthough U-Boot should support any OS or standalone application 41207152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4121c609719bSwdenkU-Boot. 4122c609719bSwdenk 4123c609719bSwdenkU-Boot includes many features that so far have been part of some 4124c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4125c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4126c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 41277152b1d0Swdenkserves several purposes: 4128c609719bSwdenk 4129c609719bSwdenk- the same features can be used for other OS or standalone 4130c609719bSwdenk applications (for instance: using compressed images to reduce the 4131c609719bSwdenk Flash memory footprint) 4132c609719bSwdenk 4133c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 41347152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4135c609719bSwdenk 4136c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4137c609719bSwdenk images; of course this also means that different kernel images can 4138c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4139c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4140c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4141c609719bSwdenk software is easier now. 4142c609719bSwdenk 4143c609719bSwdenk 4144c609719bSwdenkLinux HOWTO: 4145c609719bSwdenk============ 4146c609719bSwdenk 4147c609719bSwdenkPorting Linux to U-Boot based systems: 4148c609719bSwdenk--------------------------------------- 4149c609719bSwdenk 4150c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4151c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4152c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4153c609719bSwdenkLinux :-). 4154c609719bSwdenk 4155a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4156c609719bSwdenk 4157c609719bSwdenkJust make sure your machine specific header file (for instance 4158c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 41591dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 41601dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 41616d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4162c609719bSwdenk 4163c609719bSwdenk 4164c609719bSwdenkConfiguring the Linux kernel: 4165c609719bSwdenk----------------------------- 4166c609719bSwdenk 4167c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4168c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4169c609719bSwdenk 4170c609719bSwdenk 4171c609719bSwdenkBuilding a Linux Image: 4172c609719bSwdenk----------------------- 4173c609719bSwdenk 417424ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 417524ee89b9Swdenknot used. If you use recent kernel source, a new build target 417624ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 417724ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 417824ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 417924ee89b9Swdenk100% compatible format. 4180c609719bSwdenk 4181c609719bSwdenkExample: 4182c609719bSwdenk 4183c609719bSwdenk make TQM850L_config 4184c609719bSwdenk make oldconfig 4185c609719bSwdenk make dep 418624ee89b9Swdenk make uImage 4187c609719bSwdenk 418824ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 418924ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 419024ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4191c609719bSwdenk 419224ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 419324ee89b9Swdenk 419424ee89b9Swdenk* convert the kernel into a raw binary image: 419524ee89b9Swdenk 419624ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 419724ee89b9Swdenk -R .note -R .comment \ 419824ee89b9Swdenk -S vmlinux linux.bin 419924ee89b9Swdenk 420024ee89b9Swdenk* compress the binary image: 420124ee89b9Swdenk 420224ee89b9Swdenk gzip -9 linux.bin 420324ee89b9Swdenk 420424ee89b9Swdenk* package compressed binary image for U-Boot: 420524ee89b9Swdenk 420624ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 420724ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 420824ee89b9Swdenk -d linux.bin.gz uImage 420924ee89b9Swdenk 421024ee89b9Swdenk 421124ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 421224ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 421324ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 421424ee89b9Swdenkbyte header containing information about target architecture, 421524ee89b9Swdenkoperating system, image type, compression method, entry points, time 421624ee89b9Swdenkstamp, CRC32 checksums, etc. 421724ee89b9Swdenk 421824ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 421924ee89b9Swdenkprint the header information, or to build new images. 4220c609719bSwdenk 4221c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4222c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4223c609719bSwdenkchecksum verification: 4224c609719bSwdenk 4225c609719bSwdenk tools/mkimage -l image 4226c609719bSwdenk -l ==> list image header information 4227c609719bSwdenk 4228c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4229c609719bSwdenkfrom a "data file" which is used as image payload: 4230c609719bSwdenk 4231c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4232c609719bSwdenk -n name -d data_file image 4233c609719bSwdenk -A ==> set architecture to 'arch' 4234c609719bSwdenk -O ==> set operating system to 'os' 4235c609719bSwdenk -T ==> set image type to 'type' 4236c609719bSwdenk -C ==> set compression type 'comp' 4237c609719bSwdenk -a ==> set load address to 'addr' (hex) 4238c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4239c609719bSwdenk -n ==> set image name to 'name' 4240c609719bSwdenk -d ==> use image data from 'datafile' 4241c609719bSwdenk 424269459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 424369459791Swdenkaddress (0x00000000), but the entry point address depends on the 424469459791Swdenkkernel version: 4245c609719bSwdenk 4246c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 424724ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4248c609719bSwdenk 4249c609719bSwdenkSo a typical call to build a U-Boot image would read: 4250c609719bSwdenk 425124ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 425224ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4253a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 425424ee89b9Swdenk > examples/uImage.TQM850L 425524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4256c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4257c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4258c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4259c609719bSwdenk Load Address: 0x00000000 426024ee89b9Swdenk Entry Point: 0x00000000 4261c609719bSwdenk 4262c609719bSwdenkTo verify the contents of the image (or check for corruption): 4263c609719bSwdenk 426424ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 426524ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4266c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4267c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4268c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4269c609719bSwdenk Load Address: 0x00000000 427024ee89b9Swdenk Entry Point: 0x00000000 4271c609719bSwdenk 4272c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4273c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4274c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4275c609719bSwdenkneed to be uncompressed: 4276c609719bSwdenk 4277a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 427824ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 427924ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4280a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 428124ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 428224ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4283c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4284c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4285c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4286c609719bSwdenk Load Address: 0x00000000 428724ee89b9Swdenk Entry Point: 0x00000000 4288c609719bSwdenk 4289c609719bSwdenk 4290c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4291c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4292c609719bSwdenk 4293c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4294c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4295c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4296c609719bSwdenk Image Name: Simple Ramdisk Image 4297c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4298c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4299c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4300c609719bSwdenk Load Address: 0x00000000 4301c609719bSwdenk Entry Point: 0x00000000 4302c609719bSwdenk 4303c609719bSwdenk 4304c609719bSwdenkInstalling a Linux Image: 4305c609719bSwdenk------------------------- 4306c609719bSwdenk 4307c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4308c609719bSwdenkyou must convert the image to S-Record format: 4309c609719bSwdenk 4310c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4311c609719bSwdenk 4312c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4313c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4314c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4315c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4316c609719bSwdenkcommand. 4317c609719bSwdenk 4318c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4319c609719bSwdenkTQM8xxL is in the first Flash bank): 4320c609719bSwdenk 4321c609719bSwdenk => erase 40100000 401FFFFF 4322c609719bSwdenk 4323c609719bSwdenk .......... done 4324c609719bSwdenk Erased 8 sectors 4325c609719bSwdenk 4326c609719bSwdenk => loads 40100000 4327c609719bSwdenk ## Ready for S-Record download ... 4328c609719bSwdenk ~>examples/image.srec 4329c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4330c609719bSwdenk ... 4331c609719bSwdenk 15989 15990 15991 15992 4332c609719bSwdenk [file transfer complete] 4333c609719bSwdenk [connected] 4334c609719bSwdenk ## Start Addr = 0x00000000 4335c609719bSwdenk 4336c609719bSwdenk 4337c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4338c609719bSwdenkthis includes a checksum verification so you can be sure no data 4339c609719bSwdenkcorruption happened: 4340c609719bSwdenk 4341c609719bSwdenk => imi 40100000 4342c609719bSwdenk 4343c609719bSwdenk ## Checking Image at 40100000 ... 4344c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4345c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4346c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4347c609719bSwdenk Load Address: 00000000 4348c609719bSwdenk Entry Point: 0000000c 4349c609719bSwdenk Verifying Checksum ... OK 4350c609719bSwdenk 4351c609719bSwdenk 4352c609719bSwdenkBoot Linux: 4353c609719bSwdenk----------- 4354c609719bSwdenk 4355c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4356c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4357c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4358c609719bSwdenkparameters. You can check and modify this variable using the 4359c609719bSwdenk"printenv" and "setenv" commands: 4360c609719bSwdenk 4361c609719bSwdenk 4362c609719bSwdenk => printenv bootargs 4363c609719bSwdenk bootargs=root=/dev/ram 4364c609719bSwdenk 4365c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4366c609719bSwdenk 4367c609719bSwdenk => printenv bootargs 4368c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4369c609719bSwdenk 4370c609719bSwdenk => bootm 40020000 4371c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4372c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4373c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4374c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4375c609719bSwdenk Load Address: 00000000 4376c609719bSwdenk Entry Point: 0000000c 4377c609719bSwdenk Verifying Checksum ... OK 4378c609719bSwdenk Uncompressing Kernel Image ... OK 4379c609719bSwdenk 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 4380c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4381c609719bSwdenk time_init: decrementer frequency = 187500000/60 4382c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4383c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4384c609719bSwdenk ... 4385c609719bSwdenk 438611ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 43877152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4388c609719bSwdenkformat!) to the "bootm" command: 4389c609719bSwdenk 4390c609719bSwdenk => imi 40100000 40200000 4391c609719bSwdenk 4392c609719bSwdenk ## Checking Image at 40100000 ... 4393c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4394c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4395c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4396c609719bSwdenk Load Address: 00000000 4397c609719bSwdenk Entry Point: 0000000c 4398c609719bSwdenk Verifying Checksum ... OK 4399c609719bSwdenk 4400c609719bSwdenk ## Checking Image at 40200000 ... 4401c609719bSwdenk Image Name: Simple Ramdisk Image 4402c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4403c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4404c609719bSwdenk Load Address: 00000000 4405c609719bSwdenk Entry Point: 00000000 4406c609719bSwdenk Verifying Checksum ... OK 4407c609719bSwdenk 4408c609719bSwdenk => bootm 40100000 40200000 4409c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4410c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4411c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4412c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4413c609719bSwdenk Load Address: 00000000 4414c609719bSwdenk Entry Point: 0000000c 4415c609719bSwdenk Verifying Checksum ... OK 4416c609719bSwdenk Uncompressing Kernel Image ... OK 4417c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4418c609719bSwdenk Image Name: Simple Ramdisk Image 4419c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4420c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4421c609719bSwdenk Load Address: 00000000 4422c609719bSwdenk Entry Point: 00000000 4423c609719bSwdenk Verifying Checksum ... OK 4424c609719bSwdenk Loading Ramdisk ... OK 4425c609719bSwdenk 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 4426c609719bSwdenk Boot arguments: root=/dev/ram 4427c609719bSwdenk time_init: decrementer frequency = 187500000/60 4428c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4429c609719bSwdenk ... 4430c609719bSwdenk RAMDISK: Compressed image found at block 0 4431c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4432c609719bSwdenk 4433c609719bSwdenk bash# 4434c609719bSwdenk 44350267768eSMatthew McClintockBoot Linux and pass a flat device tree: 44360267768eSMatthew McClintock----------- 44370267768eSMatthew McClintock 44380267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 44390267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 44400267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 44410267768eSMatthew McClintockflat device tree: 44420267768eSMatthew McClintock 44430267768eSMatthew McClintock=> print oftaddr 44440267768eSMatthew McClintockoftaddr=0x300000 44450267768eSMatthew McClintock=> print oft 44460267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 44470267768eSMatthew McClintock=> tftp $oftaddr $oft 44480267768eSMatthew McClintockSpeed: 1000, full duplex 44490267768eSMatthew McClintockUsing TSEC0 device 44500267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 44510267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 44520267768eSMatthew McClintockLoad address: 0x300000 44530267768eSMatthew McClintockLoading: # 44540267768eSMatthew McClintockdone 44550267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 44560267768eSMatthew McClintock=> tftp $loadaddr $bootfile 44570267768eSMatthew McClintockSpeed: 1000, full duplex 44580267768eSMatthew McClintockUsing TSEC0 device 44590267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 44600267768eSMatthew McClintockFilename 'uImage'. 44610267768eSMatthew McClintockLoad address: 0x200000 44620267768eSMatthew McClintockLoading:############ 44630267768eSMatthew McClintockdone 44640267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 44650267768eSMatthew McClintock=> print loadaddr 44660267768eSMatthew McClintockloadaddr=200000 44670267768eSMatthew McClintock=> print oftaddr 44680267768eSMatthew McClintockoftaddr=0x300000 44690267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 44700267768eSMatthew McClintock## Booting image at 00200000 ... 44710267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 44720267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 44730267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 44740267768eSMatthew McClintock Load Address: 00000000 44750267768eSMatthew McClintock Entry Point: 00000000 44760267768eSMatthew McClintock Verifying Checksum ... OK 44770267768eSMatthew McClintock Uncompressing Kernel Image ... OK 44780267768eSMatthew McClintockBooting using flat device tree at 0x300000 44790267768eSMatthew McClintockUsing MPC85xx ADS machine description 44800267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 44810267768eSMatthew McClintock[snip] 44820267768eSMatthew McClintock 44830267768eSMatthew McClintock 44846069ff26SwdenkMore About U-Boot Image Types: 44856069ff26Swdenk------------------------------ 44866069ff26Swdenk 44876069ff26SwdenkU-Boot supports the following image types: 44886069ff26Swdenk 44896069ff26Swdenk "Standalone Programs" are directly runnable in the environment 44906069ff26Swdenk provided by U-Boot; it is expected that (if they behave 44916069ff26Swdenk well) you can continue to work in U-Boot after return from 44926069ff26Swdenk the Standalone Program. 44936069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 44946069ff26Swdenk will take over control completely. Usually these programs 44956069ff26Swdenk will install their own set of exception handlers, device 44966069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 44976069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 44986069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 44996069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 45006069ff26Swdenk being started. 45016069ff26Swdenk "Multi-File Images" contain several images, typically an OS 45026069ff26Swdenk (Linux) kernel image and one or more data images like 45036069ff26Swdenk RAMDisks. This construct is useful for instance when you want 45046069ff26Swdenk to boot over the network using BOOTP etc., where the boot 45056069ff26Swdenk server provides just a single image file, but you want to get 45066069ff26Swdenk for instance an OS kernel and a RAMDisk image. 45076069ff26Swdenk 45086069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 45096069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 45106069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 45116069ff26Swdenk Immediately after the terminating 0 follow the images, one by 45126069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 45136069ff26Swdenk a multiple of 4 bytes). 45146069ff26Swdenk 45156069ff26Swdenk "Firmware Images" are binary images containing firmware (like 45166069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 45176069ff26Swdenk flash memory. 45186069ff26Swdenk 45196069ff26Swdenk "Script files" are command sequences that will be executed by 45206069ff26Swdenk U-Boot's command interpreter; this feature is especially 45216069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 45226069ff26Swdenk as command interpreter. 45236069ff26Swdenk 452444f074c7SMarek VasutBooting the Linux zImage: 452544f074c7SMarek Vasut------------------------- 452644f074c7SMarek Vasut 452744f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 452844f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 452944f074c7SMarek Vasutas the syntax of "bootm" command. 453044f074c7SMarek Vasut 4531017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4532017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4533017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4534017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4535017e1f3fSMarek Vasut 4536c609719bSwdenk 4537c609719bSwdenkStandalone HOWTO: 4538c609719bSwdenk================= 4539c609719bSwdenk 4540c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4541c609719bSwdenkrun "standalone" applications, which can use some resources of 4542c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4543c609719bSwdenk 4544c609719bSwdenkTwo simple examples are included with the sources: 4545c609719bSwdenk 4546c609719bSwdenk"Hello World" Demo: 4547c609719bSwdenk------------------- 4548c609719bSwdenk 4549c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4550c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4551c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4552c609719bSwdenklike that: 4553c609719bSwdenk 4554c609719bSwdenk => loads 4555c609719bSwdenk ## Ready for S-Record download ... 4556c609719bSwdenk ~>examples/hello_world.srec 4557c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4558c609719bSwdenk [file transfer complete] 4559c609719bSwdenk [connected] 4560c609719bSwdenk ## Start Addr = 0x00040004 4561c609719bSwdenk 4562c609719bSwdenk => go 40004 Hello World! This is a test. 4563c609719bSwdenk ## Starting application at 0x00040004 ... 4564c609719bSwdenk Hello World 4565c609719bSwdenk argc = 7 4566c609719bSwdenk argv[0] = "40004" 4567c609719bSwdenk argv[1] = "Hello" 4568c609719bSwdenk argv[2] = "World!" 4569c609719bSwdenk argv[3] = "This" 4570c609719bSwdenk argv[4] = "is" 4571c609719bSwdenk argv[5] = "a" 4572c609719bSwdenk argv[6] = "test." 4573c609719bSwdenk argv[7] = "<NULL>" 4574c609719bSwdenk Hit any key to exit ... 4575c609719bSwdenk 4576c609719bSwdenk ## Application terminated, rc = 0x0 4577c609719bSwdenk 4578c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4579c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4580c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4581c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4582c609719bSwdenkcharacter, but this is just a demo program. The application can be 4583c609719bSwdenkcontrolled by the following keys: 4584c609719bSwdenk 4585c609719bSwdenk ? - print current values og the CPM Timer registers 4586c609719bSwdenk b - enable interrupts and start timer 4587c609719bSwdenk e - stop timer and disable interrupts 4588c609719bSwdenk q - quit application 4589c609719bSwdenk 4590c609719bSwdenk => loads 4591c609719bSwdenk ## Ready for S-Record download ... 4592c609719bSwdenk ~>examples/timer.srec 4593c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4594c609719bSwdenk [file transfer complete] 4595c609719bSwdenk [connected] 4596c609719bSwdenk ## Start Addr = 0x00040004 4597c609719bSwdenk 4598c609719bSwdenk => go 40004 4599c609719bSwdenk ## Starting application at 0x00040004 ... 4600c609719bSwdenk TIMERS=0xfff00980 4601c609719bSwdenk Using timer 1 4602c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4603c609719bSwdenk 4604c609719bSwdenkHit 'b': 4605c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4606c609719bSwdenk Enabling timer 4607c609719bSwdenkHit '?': 4608c609719bSwdenk [q, b, e, ?] ........ 4609c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4610c609719bSwdenkHit '?': 4611c609719bSwdenk [q, b, e, ?] . 4612c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4613c609719bSwdenkHit '?': 4614c609719bSwdenk [q, b, e, ?] . 4615c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4616c609719bSwdenkHit '?': 4617c609719bSwdenk [q, b, e, ?] . 4618c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4619c609719bSwdenkHit 'e': 4620c609719bSwdenk [q, b, e, ?] ...Stopping timer 4621c609719bSwdenkHit 'q': 4622c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4623c609719bSwdenk 4624c609719bSwdenk 462585ec0bccSwdenkMinicom warning: 462685ec0bccSwdenk================ 462785ec0bccSwdenk 46287152b1d0SwdenkOver time, many people have reported problems when trying to use the 462985ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 463085ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4631f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 463285ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 463385ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 463485ec0bccSwdenk 463552f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 463652f52c14Swdenkconfiguration to your "File transfer protocols" section: 463752f52c14Swdenk 463852f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 463952f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 464052f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 464152f52c14Swdenk 464252f52c14Swdenk 4643c609719bSwdenkNetBSD Notes: 4644c609719bSwdenk============= 4645c609719bSwdenk 4646c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4647c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4648c609719bSwdenk 4649c609719bSwdenkBuilding requires a cross environment; it is known to work on 4650c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4651c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4652c609719bSwdenkNote that the cross-powerpc package does not install include files; 4653c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4654c609719bSwdenkmissing. This file has to be installed and patched manually: 4655c609719bSwdenk 4656c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4657c609719bSwdenk # mkdir powerpc 4658c609719bSwdenk # ln -s powerpc machine 4659c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4660c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4661c609719bSwdenk 4662c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4663c609719bSwdenkand U-Boot include files. 4664c609719bSwdenk 4665c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4666c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4667c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4668c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 46692a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4670c609719bSwdenk 4671c609719bSwdenk 4672c609719bSwdenkImplementation Internals: 4673c609719bSwdenk========================= 4674c609719bSwdenk 4675c609719bSwdenkThe following is not intended to be a complete description of every 4676c609719bSwdenkimplementation detail. However, it should help to understand the 4677c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4678c609719bSwdenkhardware. 4679c609719bSwdenk 4680c609719bSwdenk 4681c609719bSwdenkInitial Stack, Global Data: 4682c609719bSwdenk--------------------------- 4683c609719bSwdenk 4684c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4685c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4686c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4687c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4688c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4689c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4690c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4691c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4692c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4693c609719bSwdenklocked as (mis-) used as memory, etc. 4694c609719bSwdenk 46957152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 46960668236bSWolfgang Denk U-Boot mailing list: 469743d9616cSwdenk 469843d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 469943d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 470043d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 470143d9616cSwdenk ... 470243d9616cSwdenk 470343d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 470443d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 470543d9616cSwdenk require any physical RAM backing up the cache. The cleverness 470643d9616cSwdenk is that the cache is being used as a temporary supply of 470743d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 470811ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 470943d9616cSwdenk can see how this works by studying the cache architecture and 471043d9616cSwdenk operation in the architecture and processor-specific manuals. 471143d9616cSwdenk 471243d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 471343d9616cSwdenk is another option for the system designer to use as an 471411ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 471543d9616cSwdenk option should work for you. Using CS 4 should be fine if your 471643d9616cSwdenk board designers haven't used it for something that would 471743d9616cSwdenk cause you grief during the initial boot! It is frequently not 471843d9616cSwdenk used. 471943d9616cSwdenk 47206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 472143d9616cSwdenk with your processor/board/system design. The default value 472243d9616cSwdenk you will find in any recent u-boot distribution in 47238a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 472443d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 472543d9616cSwdenk it above 400_0000. Just make sure your board has no resources 472643d9616cSwdenk that are supposed to respond to that address! That code in 472743d9616cSwdenk start.S has been around a while and should work as is when 472843d9616cSwdenk you get the config right. 472943d9616cSwdenk 473043d9616cSwdenk -Chris Hallinan 473143d9616cSwdenk DS4.COM, Inc. 473243d9616cSwdenk 4733c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4734c609719bSwdenkcode for the initialization procedures: 4735c609719bSwdenk 4736c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4737c609719bSwdenk to write it. 4738c609719bSwdenk 473911ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4740c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 47417152b1d0Swdenk zation is performed later (when relocating to RAM). 4742c609719bSwdenk 4743c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4744c609719bSwdenk that. 4745c609719bSwdenk 4746c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4747c609719bSwdenknormal global data to share information beween the code. But it 4748c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4749c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4750c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4751c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4752c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4753c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4754c609719bSwdenkreserve for this purpose. 4755c609719bSwdenk 47567152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4757c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4758c609719bSwdenkGCC's implementation. 4759c609719bSwdenk 4760c609719bSwdenkFor PowerPC, the following registers have specific use: 4761c609719bSwdenk R1: stack pointer 4762e7670f6cSWolfgang Denk R2: reserved for system use 4763c609719bSwdenk R3-R4: parameter passing and return values 4764c609719bSwdenk R5-R10: parameter passing 4765c609719bSwdenk R13: small data area pointer 4766c609719bSwdenk R30: GOT pointer 4767c609719bSwdenk R31: frame pointer 4768c609719bSwdenk 4769e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4770e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4771e6bee808SJoakim Tjernlund going back and forth between asm and C) 4772c609719bSwdenk 4773e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4774c609719bSwdenk 4775c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4776c609719bSwdenk address of the global data structure is known at compile time), 4777c609719bSwdenk but it turned out that reserving a register results in somewhat 4778c609719bSwdenk smaller code - although the code savings are not that big (on 4779c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4780c609719bSwdenk 624 text + 127 data). 4781c609719bSwdenk 4782c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 47834c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 47844c58eb55SMike Frysinger 4785c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 47864c58eb55SMike Frysinger 4787c609719bSwdenkOn ARM, the following registers are used: 4788c609719bSwdenk 4789c609719bSwdenk R0: function argument word/integer result 4790c609719bSwdenk R1-R3: function argument word 4791c609719bSwdenk R9: GOT pointer 4792c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4793c609719bSwdenk R11: argument (frame) pointer 4794c609719bSwdenk R12: temporary workspace 4795c609719bSwdenk R13: stack pointer 4796c609719bSwdenk R14: link register 4797c609719bSwdenk R15: program counter 4798c609719bSwdenk 4799c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4800c609719bSwdenk 48010df01fd3SThomas ChouOn Nios II, the ABI is documented here: 48020df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 48030df01fd3SThomas Chou 48040df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 48050df01fd3SThomas Chou 48060df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 48070df01fd3SThomas Chou to access small data sections, so gp is free. 48080df01fd3SThomas Chou 4809afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4810afc1ce82SMacpaul Lin 4811afc1ce82SMacpaul Lin R0-R1: argument/return 4812afc1ce82SMacpaul Lin R2-R5: argument 4813afc1ce82SMacpaul Lin R15: temporary register for assembler 4814afc1ce82SMacpaul Lin R16: trampoline register 4815afc1ce82SMacpaul Lin R28: frame pointer (FP) 4816afc1ce82SMacpaul Lin R29: global pointer (GP) 4817afc1ce82SMacpaul Lin R30: link register (LP) 4818afc1ce82SMacpaul Lin R31: stack pointer (SP) 4819afc1ce82SMacpaul Lin PC: program counter (PC) 4820afc1ce82SMacpaul Lin 4821afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4822afc1ce82SMacpaul Lin 4823d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4824d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4825c609719bSwdenk 4826c609719bSwdenkMemory Management: 4827c609719bSwdenk------------------ 4828c609719bSwdenk 4829c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4830c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4831c609719bSwdenk 4832c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4833c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4834c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4835c609719bSwdenkphysical memory banks. 4836c609719bSwdenk 4837c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4838c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4839c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4840c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 48416d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4842c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4843c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4844c609719bSwdenk 4845c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4846c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4847c609719bSwdenk 4848c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4849c609719bSwdenkthis: 4850c609719bSwdenk 4851c609719bSwdenk 0x0000 0000 Exception Vector code 4852c609719bSwdenk : 4853c609719bSwdenk 0x0000 1FFF 4854c609719bSwdenk 0x0000 2000 Free for Application Use 4855c609719bSwdenk : 4856c609719bSwdenk : 4857c609719bSwdenk 4858c609719bSwdenk : 4859c609719bSwdenk : 4860c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4861c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4862c609719bSwdenk 0x00FC 0000 Malloc Arena 4863c609719bSwdenk : 4864c609719bSwdenk 0x00FD FFFF 4865c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4866c609719bSwdenk ... eventually: LCD or video framebuffer 4867c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4868c609719bSwdenk 0x00FF FFFF [End of RAM] 4869c609719bSwdenk 4870c609719bSwdenk 4871c609719bSwdenkSystem Initialization: 4872c609719bSwdenk---------------------- 4873c609719bSwdenk 4874c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 487511ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4876c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 48777152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4878c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4879c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4880c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4881c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4882c609719bSwdenkthe caches and the SIU. 4883c609719bSwdenk 4884c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4885c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4886c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4887c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4888c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4889c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4890c609719bSwdenkbanks. 4891c609719bSwdenk 4892c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 48937152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4894c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4895c609719bSwdenk0x00000000, with any additional banks following immediately to create 4896c609719bSwdenkcontiguous memory starting from 0. 4897c609719bSwdenk 4898c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4899c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4900c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4901c609719bSwdenkpages, and the final stack is set up. 4902c609719bSwdenk 4903c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4904c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4905c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4906c609719bSwdenknew address in RAM. 4907c609719bSwdenk 4908c609719bSwdenk 4909c609719bSwdenkU-Boot Porting Guide: 4910c609719bSwdenk---------------------- 4911c609719bSwdenk 4912c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 49136aff3115Swdenklist, October 2002] 4914c609719bSwdenk 4915c609719bSwdenk 4916c609719bSwdenkint main(int argc, char *argv[]) 4917c609719bSwdenk{ 4918c609719bSwdenk sighandler_t no_more_time; 4919c609719bSwdenk 4920c609719bSwdenk signal(SIGALRM, no_more_time); 4921c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4922c609719bSwdenk 4923c609719bSwdenk if (available_money > available_manpower) { 49246c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4925c609719bSwdenk return 0; 4926c609719bSwdenk } 4927c609719bSwdenk 4928c609719bSwdenk Download latest U-Boot source; 4929c609719bSwdenk 49300668236bSWolfgang Denk Subscribe to u-boot mailing list; 49316aff3115Swdenk 49326c3fef28SJerry Van Baren if (clueless) 4933c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4934c609719bSwdenk 4935c609719bSwdenk while (learning) { 4936c609719bSwdenk Read the README file in the top level directory; 49377cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 49386c3fef28SJerry Van Baren Read applicable doc/*.README; 4939c609719bSwdenk Read the source, Luke; 49406c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4941c609719bSwdenk } 4942c609719bSwdenk 49436c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 49446c3fef28SJerry Van Baren Buy a BDI3000; 49456c3fef28SJerry Van Baren else 4946c609719bSwdenk Add a lot of aggravation and time; 4947c609719bSwdenk 49486c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 49496c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 49506c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 49516c3fef28SJerry Van Baren } else { 4952c609719bSwdenk Create your own board support subdirectory; 49536c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 49546c3fef28SJerry Van Baren } 49556c3fef28SJerry Van Baren Edit new board/<myboard> files 49566c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4957c609719bSwdenk 49586c3fef28SJerry Van Baren while (!accepted) { 4959c609719bSwdenk while (!running) { 4960c609719bSwdenk do { 4961c609719bSwdenk Add / modify source code; 4962c609719bSwdenk } until (compiles); 4963c609719bSwdenk Debug; 4964c609719bSwdenk if (clueless) 4965c609719bSwdenk email("Hi, I am having problems..."); 4966c609719bSwdenk } 49676c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 49686c3fef28SJerry Van Baren if (reasonable critiques) 49696c3fef28SJerry Van Baren Incorporate improvements from email list code review; 49706c3fef28SJerry Van Baren else 49716c3fef28SJerry Van Baren Defend code as written; 49726c3fef28SJerry Van Baren } 4973c609719bSwdenk 4974c609719bSwdenk return 0; 4975c609719bSwdenk} 4976c609719bSwdenk 4977c609719bSwdenkvoid no_more_time (int sig) 4978c609719bSwdenk{ 4979c609719bSwdenk hire_a_guru(); 4980c609719bSwdenk} 4981c609719bSwdenk 4982c609719bSwdenk 4983c609719bSwdenkCoding Standards: 4984c609719bSwdenk----------------- 4985c609719bSwdenk 4986c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 49872c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 49887ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 4989c609719bSwdenk 49902c051651SDetlev ZundelSource files originating from a different project (for example the 49912c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 49922c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 49932c051651SDetlev Zundelsources. 49942c051651SDetlev Zundel 49952c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 49962c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 49972c051651SDetlev Zundelin your code. 4998c609719bSwdenk 4999c178d3daSwdenkPlease also stick to the following formatting rules: 5000180d3f74Swdenk- remove any trailing white space 50017ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5002180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 50037ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5004180d3f74Swdenk- do not add trailing empty lines to source files 5005180d3f74Swdenk 5006c609719bSwdenkSubmissions which do not conform to the standards may be returned 5007c609719bSwdenkwith a request to reformat the changes. 5008c609719bSwdenk 5009c609719bSwdenk 5010c609719bSwdenkSubmitting Patches: 5011c609719bSwdenk------------------- 5012c609719bSwdenk 5013c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5014c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5015c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5016c609719bSwdenk 50170d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5018218ca724SWolfgang Denk 50190668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 50200668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 50210668236bSWolfgang Denk 5022c609719bSwdenkWhen you send a patch, please include the following information with 5023c609719bSwdenkit: 5024c609719bSwdenk 5025c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5026c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5027c609719bSwdenk patch actually fixes something. 5028c609719bSwdenk 5029c609719bSwdenk* For new features: a description of the feature and your 5030c609719bSwdenk implementation. 5031c609719bSwdenk 5032c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5033c609719bSwdenk 5034c609719bSwdenk* For major contributions, your entry to the CREDITS file 5035c609719bSwdenk 5036c609719bSwdenk* When you add support for a new board, don't forget to add this 50377ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5038c609719bSwdenk 5039c609719bSwdenk* If your patch adds new configuration options, don't forget to 5040c609719bSwdenk document these in the README file. 5041c609719bSwdenk 5042218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5043218ca724SWolfgang Denk recommended) you can easily generate the patch using the 50447ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5045218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5046218ca724SWolfgang Denk with some other mail clients. 5047c609719bSwdenk 5048218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5049218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5050218ca724SWolfgang Denk GNU diff. 50516dff5529Swdenk 5052218ca724SWolfgang Denk The current directory when running this command shall be the parent 5053218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5054218ca724SWolfgang Denk your patch includes sufficient directory information for the 5055218ca724SWolfgang Denk affected files). 5056218ca724SWolfgang Denk 5057218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5058218ca724SWolfgang Denk and compressed attachments must not be used. 5059c609719bSwdenk 506052f52c14Swdenk* If one logical set of modifications affects or creates several 506152f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 506252f52c14Swdenk 506352f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 506452f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 506552f52c14Swdenk 506652f52c14Swdenk 5067c609719bSwdenkNotes: 5068c609719bSwdenk 5069c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5070c609719bSwdenk source tree and make sure that no errors or warnings are reported 5071c609719bSwdenk for any of the boards. 5072c609719bSwdenk 5073c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5074c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5075c609719bSwdenk returned with a request to re-formatting / split it. 5076c609719bSwdenk 5077c609719bSwdenk* If you modify existing code, make sure that your new code does not 5078c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5079c609719bSwdenk When adding new features, these should compile conditionally only 5080c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5081c609719bSwdenk disabled must not need more memory than the old code without your 5082c609719bSwdenk modification. 508390dc6704Swdenk 50840668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 50850668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 50860668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 50870668236bSWolfgang Denk bigger than the size limit should be avoided. 5088