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 57adb9d851SRobert P. J. DayNote: There is no CHANGELOG file in the actual U-Boot source tree; 58adb9d851SRobert P. J. Dayit can be created dynamically from the Git log using: 59adb9d851SRobert P. J. Day 60adb9d851SRobert P. J. Day make CHANGELOG 61adb9d851SRobert P. J. Day 62c609719bSwdenk 63c609719bSwdenkWhere to get help: 64c609719bSwdenk================== 65c609719bSwdenk 66c609719bSwdenkIn case you have questions about, problems with or contributions for 67c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 680c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 690c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 700c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 710c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 72c609719bSwdenk 73c609719bSwdenk 74218ca724SWolfgang DenkWhere to get source code: 75218ca724SWolfgang Denk========================= 76218ca724SWolfgang Denk 77218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 78218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 79218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 80218ca724SWolfgang Denk 81218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 8211ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 83218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 84218ca724SWolfgang Denkdirectory. 85218ca724SWolfgang Denk 86d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 87218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 88218ca724SWolfgang Denk 89218ca724SWolfgang Denk 90c609719bSwdenkWhere we come from: 91c609719bSwdenk=================== 92c609719bSwdenk 93c609719bSwdenk- start from 8xxrom sources 9424ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 95c609719bSwdenk- clean up code 96c609719bSwdenk- make it easier to add custom boards 97c609719bSwdenk- make it possible to add other [PowerPC] CPUs 98c609719bSwdenk- extend functions, especially: 99c609719bSwdenk * Provide extended interface to Linux boot loader 100c609719bSwdenk * S-Record download 101c609719bSwdenk * network boot 10211ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 10324ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 104c609719bSwdenk- add other CPU families (starting with ARM) 10524ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 1060d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 10724ee89b9Swdenk 10824ee89b9Swdenk 10924ee89b9SwdenkNames and Spelling: 11024ee89b9Swdenk=================== 11124ee89b9Swdenk 11224ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 11324ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 11424ee89b9Swdenkin source files etc.). Example: 11524ee89b9Swdenk 11624ee89b9Swdenk This is the README file for the U-Boot project. 11724ee89b9Swdenk 11824ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 11924ee89b9Swdenk 12024ee89b9Swdenk include/asm-ppc/u-boot.h 12124ee89b9Swdenk 12224ee89b9Swdenk #include <asm/u-boot.h> 12324ee89b9Swdenk 12424ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 12524ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 12624ee89b9Swdenk 12724ee89b9Swdenk U_BOOT_VERSION u_boot_logo 12824ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 129c609719bSwdenk 130c609719bSwdenk 13193f19cc0SwdenkVersioning: 13293f19cc0Swdenk=========== 13393f19cc0Swdenk 134360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 135360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 136360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 137360d883aSThomas Webernames consisting of the calendar year and month of the release date. 138360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 139360d883aSThomas Weberreleases in "stable" maintenance trees. 14093f19cc0Swdenk 141360d883aSThomas WeberExamples: 142360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 143360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 144360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 14593f19cc0Swdenk 14693f19cc0Swdenk 147c609719bSwdenkDirectory Hierarchy: 148c609719bSwdenk==================== 149c609719bSwdenk 1508d321b81SPeter Tyser/arch Architecture specific files 1518d321b81SPeter Tyser /arm Files generic to ARM architecture 1528d321b81SPeter Tyser /cpu CPU specific files 1538d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 1548d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 1556eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 1568d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 1578d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 1588d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 1598d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 1608d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 1618d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 1628d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 1638d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 1648d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 1658d321b81SPeter Tyser /lib Architecture specific library files 1668d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 1678d321b81SPeter Tyser /cpu CPU specific files 1688d321b81SPeter Tyser /lib Architecture specific library files 1698d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 1708d321b81SPeter Tyser /cpu CPU specific files 1718d321b81SPeter Tyser /lib Architecture specific library files 172fea25720SGraeme Russ /x86 Files generic to x86 architecture 1738d321b81SPeter Tyser /cpu CPU specific files 1748d321b81SPeter Tyser /lib Architecture specific library files 1758d321b81SPeter Tyser /m68k Files generic to m68k architecture 1768d321b81SPeter Tyser /cpu CPU specific files 1778d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1788d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1798d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1808d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 1818d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 1828d321b81SPeter Tyser /lib Architecture specific library files 1838d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 1848d321b81SPeter Tyser /cpu CPU specific files 1858d321b81SPeter Tyser /lib Architecture specific library files 1868d321b81SPeter Tyser /mips Files generic to MIPS architecture 1878d321b81SPeter Tyser /cpu CPU specific files 18892bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 18980421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 1908d321b81SPeter Tyser /lib Architecture specific library files 191afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 192afc1ce82SMacpaul Lin /cpu CPU specific files 193afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 194afc1ce82SMacpaul Lin /lib Architecture specific library files 1958d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 1968d321b81SPeter Tyser /cpu CPU specific files 1978d321b81SPeter Tyser /lib Architecture specific library files 198a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 1998d321b81SPeter Tyser /cpu CPU specific files 2008d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 2018d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 2028d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 2038d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 2048d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 2058d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 2068d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 2078d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 2088d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 2098d321b81SPeter Tyser /lib Architecture specific library files 2108d321b81SPeter Tyser /sh Files generic to SH architecture 2118d321b81SPeter Tyser /cpu CPU specific files 2128d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 2138d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 2148d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 2158d321b81SPeter Tyser /lib Architecture specific library files 2168d321b81SPeter Tyser /sparc Files generic to SPARC architecture 2178d321b81SPeter Tyser /cpu CPU specific files 2188d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 2198d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 2208d321b81SPeter Tyser /lib Architecture specific library files 2218d321b81SPeter Tyser/api Machine/arch independent API for external apps 2228d321b81SPeter Tyser/board Board dependent files 2238d321b81SPeter Tyser/common Misc architecture independent functions 2248d321b81SPeter Tyser/disk Code for disk drive partition handling 2258d321b81SPeter Tyser/doc Documentation (don't expect too much) 2268d321b81SPeter Tyser/drivers Commonly used device drivers 2278d321b81SPeter Tyser/examples Example code for standalone applications, etc. 2288d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 2298d321b81SPeter Tyser/include Header Files 2308d321b81SPeter Tyser/lib Files generic to all architectures 2318d321b81SPeter Tyser /libfdt Library files to support flattened device trees 2328d321b81SPeter Tyser /lzma Library files to support LZMA decompression 2338d321b81SPeter Tyser /lzo Library files to support LZO decompression 2348d321b81SPeter Tyser/net Networking code 2358d321b81SPeter Tyser/post Power On Self Test 2368d321b81SPeter Tyser/rtc Real Time Clock drivers 2378d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 238c609719bSwdenk 239c609719bSwdenkSoftware Configuration: 240c609719bSwdenk======================= 241c609719bSwdenk 242c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 243c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 244c609719bSwdenk 245c609719bSwdenkThere are two classes of configuration variables: 246c609719bSwdenk 247c609719bSwdenk* Configuration _OPTIONS_: 248c609719bSwdenk These are selectable by the user and have names beginning with 249c609719bSwdenk "CONFIG_". 250c609719bSwdenk 251c609719bSwdenk* Configuration _SETTINGS_: 252c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 253c609719bSwdenk you don't know what you're doing; they have names beginning with 2546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 255c609719bSwdenk 256c609719bSwdenkLater we will add a configuration tool - probably similar to or even 257c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 258c609719bSwdenkdo the configuration by hand, which means creating some symbolic 259c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 260c609719bSwdenkas an example here. 261c609719bSwdenk 262c609719bSwdenk 263c609719bSwdenkSelection of Processor Architecture and Board Type: 264c609719bSwdenk--------------------------------------------------- 265c609719bSwdenk 266c609719bSwdenkFor all supported boards there are ready-to-use default 267c609719bSwdenkconfigurations available; just type "make <board_name>_config". 268c609719bSwdenk 269c609719bSwdenkExample: For a TQM823L module type: 270c609719bSwdenk 271c609719bSwdenk cd u-boot 272c609719bSwdenk make TQM823L_config 273c609719bSwdenk 27411ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 275c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 276c609719bSwdenkdirectory according to the instructions in cogent/README. 277c609719bSwdenk 278c609719bSwdenk 279c609719bSwdenkConfiguration Options: 280c609719bSwdenk---------------------- 281c609719bSwdenk 282c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 283c609719bSwdenksuch information is kept in a configuration file 284c609719bSwdenk"include/configs/<board_name>.h". 285c609719bSwdenk 286c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 287c609719bSwdenk"include/configs/TQM823L.h". 288c609719bSwdenk 289c609719bSwdenk 2907f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2917f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2927f6c2cbcSwdenkbuild a config tool - later. 2937f6c2cbcSwdenk 2947f6c2cbcSwdenk 295c609719bSwdenkThe following options need to be configured: 296c609719bSwdenk 2972628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 298c609719bSwdenk 2992628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 3006ccec449SWolfgang Denk 3016ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 30209ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 303c609719bSwdenk 304c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 305c609719bSwdenk Define exactly one of 306c609719bSwdenk CONFIG_CMA286_60_OLD 307c609719bSwdenk--- FIXME --- not tested yet: 308c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 309c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 310c609719bSwdenk 311c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 312c609719bSwdenk Define exactly one of 313c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 314c609719bSwdenk 315c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 316c609719bSwdenk Define one or more of 317c609719bSwdenk CONFIG_CMA302 318c609719bSwdenk 319c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 320c609719bSwdenk Define one or more of 321c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 32211ccc33fSMarcel Ziswiler the LCD display every second with 323c609719bSwdenk a "rotator" |\-/|\-/ 324c609719bSwdenk 3252535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 3262535d602Swdenk CONFIG_ADSTYPE 3272535d602Swdenk Possible values are: 3286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 3296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 3306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 3316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 3322535d602Swdenk 333cf946c6dSLei Wen- Marvell Family Member 334cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 335cf946c6dSLei Wen multiple fs option at one time 336cf946c6dSLei Wen for marvell soc family 337cf946c6dSLei Wen 338c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 339c609719bSwdenk Define exactly one of 340c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 341c609719bSwdenk 34211ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 34366ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 34466ca92a5Swdenk get_gclk_freq() cannot work 3455da627a4Swdenk e.g. if there is no 32KHz 3465da627a4Swdenk reference PIT/RTC clock 34766ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 34866ca92a5Swdenk or XTAL/EXTAL) 349c609719bSwdenk 35066ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 3516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 3526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 35366ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 35475d1ea7fSwdenk See doc/README.MPC866 35575d1ea7fSwdenk 3566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 35775d1ea7fSwdenk 35875d1ea7fSwdenk Define this to measure the actual CPU clock instead 35975d1ea7fSwdenk of relying on the correctness of the configured 36075d1ea7fSwdenk values. Mostly useful for board bringup to make sure 36175d1ea7fSwdenk the PLL is locked at the intended frequency. Note 36275d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 3636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 36475d1ea7fSwdenk 365506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 366506f3918SHeiko Schocher 367506f3918SHeiko Schocher Define this option if you want to enable the 368506f3918SHeiko Schocher ICache only when Code runs from RAM. 369506f3918SHeiko Schocher 37066412c63SKumar Gala- 85xx CPU Options: 371ffd06e02SYork Sun CONFIG_SYS_PPC64 372ffd06e02SYork Sun 373ffd06e02SYork Sun Specifies that the core is a 64-bit PowerPC implementation (implements 374ffd06e02SYork Sun the "64" category of the Power ISA). This is necessary for ePAPR 375ffd06e02SYork Sun compliance, among other possible reasons. 376ffd06e02SYork Sun 37766412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 37866412c63SKumar Gala 37966412c63SKumar Gala Defines the core time base clock divider ratio compared to the 38066412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 38166412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 38266412c63SKumar Gala 3838f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 3848f29084aSKumar Gala 3858f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 3868f29084aSKumar Gala tree nodes for the given platform. 3878f29084aSKumar Gala 388afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 389afa6b551SPrabhakar Kushwaha 390afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 391afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 392afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 393afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 394afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 395afa6b551SPrabhakar Kushwaha purpose. 396afa6b551SPrabhakar Kushwaha 39733eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510 39833eee330SScott Wood 39933eee330SScott Wood Enables a workaround for erratum A004510. If set, 40033eee330SScott Wood then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and 40133eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. 40233eee330SScott Wood 40333eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 40433eee330SScott Wood CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) 40533eee330SScott Wood 40633eee330SScott Wood Defines one or two SoC revisions (low 8 bits of SVR) 40733eee330SScott Wood for which the A004510 workaround should be applied. 40833eee330SScott Wood 40933eee330SScott Wood The rest of SVR is either not relevant to the decision 41033eee330SScott Wood of whether the erratum is present (e.g. p2040 versus 41133eee330SScott Wood p2041) or is implied by the build target, which controls 41233eee330SScott Wood whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. 41333eee330SScott Wood 41433eee330SScott Wood See Freescale App Note 4493 for more information about 41533eee330SScott Wood this erratum. 41633eee330SScott Wood 41733eee330SScott Wood CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 41833eee330SScott Wood 41933eee330SScott Wood This is the value to write into CCSR offset 0x18600 42033eee330SScott Wood according to the A004510 workaround. 42133eee330SScott Wood 4226cb461b4SDaniel Schwierzeck- Generic CPU options: 4236cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 4246cb461b4SDaniel Schwierzeck 4256cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 4266cb461b4SDaniel Schwierzeck values is arch specific. 4276cb461b4SDaniel Schwierzeck 4280b953ffcSMarkus Klotzbuecher- Intel Monahans options: 4296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 4300b953ffcSMarkus Klotzbuecher 4310b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 4320b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 4330b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 4340b953ffcSMarkus Klotzbuecher 4356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 4360b953ffcSMarkus Klotzbuecher 4370b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 4380b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 4390b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 4400b953ffcSMarkus Klotzbuecher by this value. 4410b953ffcSMarkus Klotzbuecher 44292bbd64eSDaniel Schwierzeck- MIPS CPU options: 44392bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 44492bbd64eSDaniel Schwierzeck 44592bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 44692bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 44792bbd64eSDaniel Schwierzeck relocation. 44892bbd64eSDaniel Schwierzeck 44992bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 45092bbd64eSDaniel Schwierzeck 45192bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 45292bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 45392bbd64eSDaniel Schwierzeck Possible values are: 45492bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 45592bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 45692bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 45792bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 45892bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 45992bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 46092bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 46192bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 46292bbd64eSDaniel Schwierzeck 46392bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 46492bbd64eSDaniel Schwierzeck 46592bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 46692bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 46792bbd64eSDaniel Schwierzeck 46892bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 46992bbd64eSDaniel Schwierzeck 47092bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 47192bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 47292bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 47392bbd64eSDaniel Schwierzeck 474b67d8816SChristian Riesch- ARM options: 475b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 476b67d8816SChristian Riesch 477b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 478b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 479b67d8816SChristian Riesch 4805356f545SAneesh V CONFIG_SYS_THUMB_BUILD 4815356f545SAneesh V 4825356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 4835356f545SAneesh V set for ARM architectures. Thumb instruction set provides 4845356f545SAneesh V better code density. For ARM architectures that support 4855356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 4865356f545SAneesh V GCC. 4875356f545SAneesh V 4885da627a4Swdenk- Linux Kernel Interface: 489c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 490c609719bSwdenk 491c609719bSwdenk U-Boot stores all clock information in Hz 492c609719bSwdenk internally. For binary compatibility with older Linux 493c609719bSwdenk kernels (which expect the clocks passed in the 494c609719bSwdenk bd_info data to be in MHz) the environment variable 495c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 496c609719bSwdenk converts clock data to MHZ before passing it to the 497c609719bSwdenk Linux kernel. 498c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 499c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 500c609719bSwdenk default environment. 501c609719bSwdenk 5025da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 5035da627a4Swdenk 50411ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 5055da627a4Swdenk expect it to be in bytes, others in MB. 5065da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 5075da627a4Swdenk 508fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 509f57f70aaSWolfgang Denk 510f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 511213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 512213bf8c8SGerald Van Baren concepts). 513213bf8c8SGerald Van Baren 514213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 515213bf8c8SGerald Van Baren * New libfdt-based support 516213bf8c8SGerald Van Baren * Adds the "fdt" command 5173bb342fcSKim Phillips * The bootm command automatically updates the fdt 518213bf8c8SGerald Van Baren 519b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 520b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 521b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 522b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 523f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 524c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 525f57f70aaSWolfgang Denk 52611ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 52711ccc33fSMarcel Ziswiler addresses 5283bb342fcSKim Phillips 5294e253137SKumar Gala CONFIG_OF_BOARD_SETUP 5304e253137SKumar Gala 5314e253137SKumar Gala Board code has addition modification that it wants to make 5324e253137SKumar Gala to the flat device tree before handing it off to the kernel 5336705d81eSwdenk 5340267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 5350267768eSMatthew McClintock 53611ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 5370267768eSMatthew McClintock param header, the default value is zero if undefined. 5380267768eSMatthew McClintock 5393887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 5403887c3fbSHeiko Schocher 5413887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 5423887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 5433887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 5443887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 5453887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 5463887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 5473887c3fbSHeiko Schocher 5487eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 5497eb29398SIgor Grinberg 5507eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 5517eb29398SIgor Grinberg machine type and must be used to specify the machine type 5527eb29398SIgor Grinberg number as it appears in the ARM machine registry 5537eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 5547eb29398SIgor Grinberg Only boards that have multiple machine types supported 5557eb29398SIgor Grinberg in a single configuration file and the machine type is 5567eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 5577eb29398SIgor Grinberg 5580b2f4ecaSNiklaus Giger- vxWorks boot parameters: 5590b2f4ecaSNiklaus Giger 5600b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 5610b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 5620b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 5630b2f4ecaSNiklaus Giger 5640b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 5650b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 5660b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 5670b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 5680b2f4ecaSNiklaus Giger 5690b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 5700b2f4ecaSNiklaus Giger 5710b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 5720b2f4ecaSNiklaus Giger 5730b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 5740b2f4ecaSNiklaus Giger the defaults discussed just above. 5750b2f4ecaSNiklaus Giger 5762c451f78SAneesh V- Cache Configuration: 5772c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 5782c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 5792c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 5802c451f78SAneesh V 58193bc2193SAneesh V- Cache Configuration for ARM: 58293bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 58393bc2193SAneesh V controller 58493bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 58593bc2193SAneesh V controller register space 58693bc2193SAneesh V 5876705d81eSwdenk- Serial Ports: 58848d0192fSAndreas Engel CONFIG_PL010_SERIAL 5896705d81eSwdenk 5906705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 5916705d81eSwdenk 59248d0192fSAndreas Engel CONFIG_PL011_SERIAL 5936705d81eSwdenk 5946705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 5956705d81eSwdenk 5966705d81eSwdenk CONFIG_PL011_CLOCK 5976705d81eSwdenk 5986705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 5996705d81eSwdenk the clock speed of the UARTs. 6006705d81eSwdenk 6016705d81eSwdenk CONFIG_PL01x_PORTS 6026705d81eSwdenk 6036705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 6046705d81eSwdenk define this to a list of base addresses for each (supported) 6056705d81eSwdenk port. See e.g. include/configs/versatile.h 6066705d81eSwdenk 607910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 608910f1ae3SJohn Rigby 609910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 610910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 611910f1ae3SJohn Rigby this variable to initialize the extra register. 612910f1ae3SJohn Rigby 613910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 614910f1ae3SJohn Rigby 615910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 616910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 617910f1ae3SJohn Rigby variable to flush the UART at init time. 618910f1ae3SJohn Rigby 6196705d81eSwdenk 620c609719bSwdenk- Console Interface: 621c609719bSwdenk Depending on board, define exactly one serial port 622c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 623c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 624c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 625c609719bSwdenk 626c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 627c609719bSwdenk port routines must be defined elsewhere 628c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 629c609719bSwdenk 630c609719bSwdenk CONFIG_CFB_CONSOLE 631c609719bSwdenk Enables console device for a color framebuffer. Needs following 632c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 633c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 634c609719bSwdenk (default big endian) 635c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 636c609719bSwdenk rectangle fill 637c609719bSwdenk (cf. smiLynxEM) 638c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 639c609719bSwdenk bit-blit (cf. smiLynxEM) 640c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 641c609719bSwdenk (cols=pitch) 642c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 643c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 644c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 645c609719bSwdenk (0-5, cf. cfb_console.c) 646c609719bSwdenk VIDEO_FB_ADRS framebuffer address 647c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 648c609719bSwdenk (i.e. i8042_kbd_init()) 649c609719bSwdenk VIDEO_TSTC_FCT test char fct 650c609719bSwdenk (i.e. i8042_tstc) 651c609719bSwdenk VIDEO_GETC_FCT get char fct 652c609719bSwdenk (i.e. i8042_getc) 653c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 654c609719bSwdenk (requires blink timer 655c609719bSwdenk cf. i8042.c) 6566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 657c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 658c609719bSwdenk upper right corner 659602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 660c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 661c609719bSwdenk upper left corner 662a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 663a6c7ad2fSwdenk linux_logo.h for logo. 664a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 665c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 66611ccc33fSMarcel Ziswiler additional board info beside 667c609719bSwdenk the logo 668c609719bSwdenk 66933a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 67033a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 67133a35bbbSPali Rohár erase functions and limited graphics rendition control). 67233a35bbbSPali Rohár 673c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 674c609719bSwdenk default i/o. Serial console can be forced with 675c609719bSwdenk environment 'console=serial'. 676c609719bSwdenk 677a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 678a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 679a3ad8e26Swdenk the "silent" environment variable. See 680a3ad8e26Swdenk doc/README.silent for more information. 681a3ad8e26Swdenk 682c609719bSwdenk- Console Baudrate: 683c609719bSwdenk CONFIG_BAUDRATE - in bps 684c609719bSwdenk Select one of the baudrates listed in 6856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6866d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 687c609719bSwdenk 688c92fac91SHeiko Schocher- Console Rx buffer length 689c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 690c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6912b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 692c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 693c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 694c92fac91SHeiko Schocher the SMC. 695c92fac91SHeiko Schocher 6969558b48aSGraeme Russ- Pre-Console Buffer: 6979558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 6989558b48aSGraeme Russ initialised etc) all console output is silently discarded. 6999558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 7009558b48aSGraeme Russ buffer any console messages prior to the console being 7019558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 7029558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 7039558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 7049558b48aSGraeme Russ bytes are output before the console is initialised, the 7059558b48aSGraeme Russ earlier bytes are discarded. 7069558b48aSGraeme Russ 7079558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 7089558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 7099558b48aSGraeme Russ 710046a37bdSSonny Rao- Safe printf() functions 711046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 712046a37bdSSonny Rao the printf() functions. These are defined in 713046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 714046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 715046a37bdSSonny Rao If this option is not given then these functions will 716046a37bdSSonny Rao silently discard their buffer size argument - this means 717046a37bdSSonny Rao you are not getting any overflow checking in this case. 718046a37bdSSonny Rao 719c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 720c609719bSwdenk Delay before automatically booting the default image; 721c609719bSwdenk set to -1 to disable autoboot. 72293d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 72393d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 724c609719bSwdenk 725c609719bSwdenk See doc/README.autoboot for these options that 726c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 727c609719bSwdenk CONFIG_BOOT_RETRY_TIME 728c609719bSwdenk CONFIG_BOOT_RETRY_MIN 729c609719bSwdenk CONFIG_AUTOBOOT_KEYED 730c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 731c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 732c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 733c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 734c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 735c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 736c609719bSwdenk CONFIG_RESET_TO_RETRY 737c609719bSwdenk 738c609719bSwdenk- Autoboot Command: 739c609719bSwdenk CONFIG_BOOTCOMMAND 740c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 741c609719bSwdenk define a command string that is automatically executed 742c609719bSwdenk when no character is read on the console interface 743c609719bSwdenk within "Boot Delay" after reset. 744c609719bSwdenk 745c609719bSwdenk CONFIG_BOOTARGS 746c609719bSwdenk This can be used to pass arguments to the bootm 747c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 748c609719bSwdenk environment value "bootargs". 749c609719bSwdenk 750c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 751c609719bSwdenk The value of these goes into the environment as 752c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 753c609719bSwdenk as a convenience, when switching between booting from 75411ccc33fSMarcel Ziswiler RAM and NFS. 755c609719bSwdenk 756c609719bSwdenk- Pre-Boot Commands: 757c609719bSwdenk CONFIG_PREBOOT 758c609719bSwdenk 759c609719bSwdenk When this option is #defined, the existence of the 760c609719bSwdenk environment variable "preboot" will be checked 761c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 762c609719bSwdenk countdown and/or running the auto-boot command resp. 763c609719bSwdenk entering interactive mode. 764c609719bSwdenk 765c609719bSwdenk This feature is especially useful when "preboot" is 766c609719bSwdenk automatically generated or modified. For an example 767c609719bSwdenk see the LWMON board specific code: here "preboot" is 768c609719bSwdenk modified when the user holds down a certain 769c609719bSwdenk combination of keys on the (special) keyboard when 770c609719bSwdenk booting the systems 771c609719bSwdenk 772c609719bSwdenk- Serial Download Echo Mode: 773c609719bSwdenk CONFIG_LOADS_ECHO 774c609719bSwdenk If defined to 1, all characters received during a 775c609719bSwdenk serial download (using the "loads" command) are 776c609719bSwdenk echoed back. This might be needed by some terminal 777c609719bSwdenk emulations (like "cu"), but may as well just take 778c609719bSwdenk time on others. This setting #define's the initial 779c609719bSwdenk value of the "loads_echo" environment variable. 780c609719bSwdenk 781602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 782c609719bSwdenk CONFIG_KGDB_BAUDRATE 783c609719bSwdenk Select one of the baudrates listed in 7846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 785c609719bSwdenk 786c609719bSwdenk- Monitor Functions: 787602ad3b3SJon Loeliger Monitor commands can be included or excluded 788602ad3b3SJon Loeliger from the build by using the #include files 789c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 790c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 791602ad3b3SJon Loeliger and augmenting with additional #define's 792602ad3b3SJon Loeliger for wanted commands. 793c609719bSwdenk 794602ad3b3SJon Loeliger The default command configuration includes all commands 795602ad3b3SJon Loeliger except those marked below with a "*". 796602ad3b3SJon Loeliger 797602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 798602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 799602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 800602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 801602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 802602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 803602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 804602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 805710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 806602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 807602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 808602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 809a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 810a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 811a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 812a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 813602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 814602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 815246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 816602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 817602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 8185e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 819fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 8200c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 82103e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 82203e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 823bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 824602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 82503e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 826602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 827602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 828602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 82953fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 830a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 831a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 832bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 833602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 834602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 835602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 836602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 837602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 838602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 8390c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 840c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 841602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 842602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 843602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 844602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 8451ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 846d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 847d22c338eSJoe Hershberger (169.254.*.*) 848602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 849602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 85002c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 85102c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 852602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 85356523f12Swdenk loop, loopw, mtest 854602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 855602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 856602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 85768d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 858602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 859602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 860e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 861e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 862602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 863602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 864602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 865602ad3b3SJon Loeliger host 866602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 867ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 868602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 869602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 870602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 871602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 872602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 873602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 874602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 875602ad3b3SJon Loeliger (4xx only) 876f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 877c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 87802c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 87974de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 880602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 8817a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 8821fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 883da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 884da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 885602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 886602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 887c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 888c609719bSwdenk 889c609719bSwdenk 890c609719bSwdenk EXAMPLE: If you want all functions except of network 891c609719bSwdenk support you can write: 892c609719bSwdenk 893602ad3b3SJon Loeliger #include "config_cmd_all.h" 894602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 895c609719bSwdenk 896213bf8c8SGerald Van Baren Other Commands: 897213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 898c609719bSwdenk 899c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 900602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 901c609719bSwdenk what you (and your U-Boot users) are doing. Data 902c609719bSwdenk cache cannot be enabled on systems like the 8xx or 903c609719bSwdenk 8260 (where accesses to the IMMR region must be 904c609719bSwdenk uncached), and it cannot be disabled on all other 905c609719bSwdenk systems where we (mis-) use the data cache to hold an 906c609719bSwdenk initial stack and some data. 907c609719bSwdenk 908c609719bSwdenk 909c609719bSwdenk XXX - this list needs to get updated! 910c609719bSwdenk 91145ba8077SSimon Glass- Device tree: 91245ba8077SSimon Glass CONFIG_OF_CONTROL 91345ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 91445ba8077SSimon Glass to configure its devices, instead of relying on statically 91545ba8077SSimon Glass compiled #defines in the board file. This option is 91645ba8077SSimon Glass experimental and only available on a few boards. The device 91745ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 91845ba8077SSimon Glass 9192c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 9202c0f79e4SSimon Glass be done using one of the two options below: 921bbb0b128SSimon Glass 922bbb0b128SSimon Glass CONFIG_OF_EMBED 923bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 924bbb0b128SSimon Glass binary in its image. This device tree file should be in the 925bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 926bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 927bbb0b128SSimon Glass the global data structure as gd->blob. 92845ba8077SSimon Glass 9292c0f79e4SSimon Glass CONFIG_OF_SEPARATE 9302c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 9312c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 9322c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 9332c0f79e4SSimon Glass 9342c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 9352c0f79e4SSimon Glass 9362c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 9372c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 9382c0f79e4SSimon Glass still use the individual files if you need something more 9392c0f79e4SSimon Glass exotic. 9402c0f79e4SSimon Glass 941c609719bSwdenk- Watchdog: 942c609719bSwdenk CONFIG_WATCHDOG 943c609719bSwdenk If this variable is defined, it enables watchdog 9446abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 9456abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 9466abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 9476abe6fb6SDetlev Zundel register. When supported for a specific SoC is 9486abe6fb6SDetlev Zundel available, then no further board specific code should 9496abe6fb6SDetlev Zundel be needed to use it. 9506abe6fb6SDetlev Zundel 9516abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 9526abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 9536abe6fb6SDetlev Zundel SoC, then define this variable and provide board 9546abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 955c609719bSwdenk 956c1551ea8Sstroese- U-Boot Version: 957c1551ea8Sstroese CONFIG_VERSION_VARIABLE 958c1551ea8Sstroese If this variable is defined, an environment variable 959c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 960c1551ea8Sstroese version as printed by the "version" command. 961a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 962a1ea8e51SBenoît Thébaudeau next reset. 963c1551ea8Sstroese 964c609719bSwdenk- Real-Time Clock: 965c609719bSwdenk 966602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 967c609719bSwdenk has to be selected, too. Define exactly one of the 968c609719bSwdenk following options: 969c609719bSwdenk 970c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 971c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 9724e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 973c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 9741cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 975c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 9767f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 9773bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 9789536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 9794c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 9806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 98171d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 98271d19f30SHeiko Schocher RV3029 RTC. 983c609719bSwdenk 984b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 985b37c7e5eSwdenk must also be configured. See I2C Support, below. 986b37c7e5eSwdenk 987e92739d3SPeter Tyser- GPIO Support: 988e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 989e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 990e92739d3SPeter Tyser 9915dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 9925dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 9935dec49caSChris Packham pins supported by a particular chip. 9945dec49caSChris Packham 995e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 996e92739d3SPeter Tyser must also be configured. See I2C Support, below. 997e92739d3SPeter Tyser 998c609719bSwdenk- Timestamp Support: 999c609719bSwdenk 1000c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1001c609719bSwdenk (date and time) of an image is printed by image 1002c609719bSwdenk commands like bootm or iminfo. This option is 1003602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1004c609719bSwdenk 1005923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1006923c46f9SKarl O. Pinc Zero or more of the following: 1007923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1008923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1009923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1010923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1011923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1012923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1013923c46f9SKarl O. Pinc disk/part_efi.c 1014923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1015c609719bSwdenk 1016602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1017218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1018923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1019c609719bSwdenk 1020c609719bSwdenk- IDE Reset method: 10214d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 10224d13cbadSwdenk board configurations files but used nowhere! 1023c609719bSwdenk 10244d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 10254d13cbadSwdenk be performed by calling the function 10264d13cbadSwdenk ide_set_reset(int reset) 10274d13cbadSwdenk which has to be defined in a board specific file 1028c609719bSwdenk 1029c609719bSwdenk- ATAPI Support: 1030c609719bSwdenk CONFIG_ATAPI 1031c609719bSwdenk 1032c609719bSwdenk Set this to enable ATAPI support. 1033c609719bSwdenk 1034c40b2956Swdenk- LBA48 Support 1035c40b2956Swdenk CONFIG_LBA48 1036c40b2956Swdenk 1037c40b2956Swdenk Set this to enable support for disks larger than 137GB 10384b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1039c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1040c40b2956Swdenk support disks up to 2.1TB. 1041c40b2956Swdenk 10426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1043c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1044c40b2956Swdenk Default is 32bit. 1045c40b2956Swdenk 1046c609719bSwdenk- SCSI Support: 1047c609719bSwdenk At the moment only there is only support for the 1048c609719bSwdenk SYM53C8XX SCSI controller; define 1049c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1050c609719bSwdenk 10516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 10526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 10536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1054c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1055c609719bSwdenk devices. 10566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1057c609719bSwdenk 1058447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1059447c031bSStefan Reinauer SCSI devices found during the last scan. 1060447c031bSStefan Reinauer 1061c609719bSwdenk- NETWORK Support (PCI): 1062682011ffSwdenk CONFIG_E1000 1063ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1064ce5207e1SKyle Moffett 1065ce5207e1SKyle Moffett CONFIG_E1000_SPI 1066ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1067ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1068ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1069ce5207e1SKyle Moffett 1070ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1071ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1072ce5207e1SKyle Moffett example with the "sspi" command. 1073ce5207e1SKyle Moffett 1074ce5207e1SKyle Moffett CONFIG_CMD_E1000 1075ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1076ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1077682011ffSwdenk 1078ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 107911ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1080ac3315c2SAndre Schwarz 1081c609719bSwdenk CONFIG_EEPRO100 1082c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 108311ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1084c609719bSwdenk write routine for first time initialisation. 1085c609719bSwdenk 1086c609719bSwdenk CONFIG_TULIP 1087c609719bSwdenk Support for Digital 2114x chips. 1088c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1089c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1090c609719bSwdenk 1091c609719bSwdenk CONFIG_NATSEMI 1092c609719bSwdenk Support for National dp83815 chips. 1093c609719bSwdenk 1094c609719bSwdenk CONFIG_NS8382X 1095c609719bSwdenk Support for National dp8382[01] gigabit chips. 1096c609719bSwdenk 109745219c46Swdenk- NETWORK Support (other): 109845219c46Swdenk 1099c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1100c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1101c041e9d2SJens Scharsig 1102c041e9d2SJens Scharsig CONFIG_RMII 1103c041e9d2SJens Scharsig Define this to use reduced MII inteface 1104c041e9d2SJens Scharsig 1105c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1106c041e9d2SJens Scharsig If this defined, the driver is quiet. 1107c041e9d2SJens Scharsig The driver doen't show link status messages. 1108c041e9d2SJens Scharsig 1109efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1110efdd7319SRob Herring Support for the Calxeda XGMAC device 1111efdd7319SRob Herring 11123bb46d23SAshok CONFIG_LAN91C96 111345219c46Swdenk Support for SMSC's LAN91C96 chips. 111445219c46Swdenk 111545219c46Swdenk CONFIG_LAN91C96_BASE 111645219c46Swdenk Define this to hold the physical address 111745219c46Swdenk of the LAN91C96's I/O space 111845219c46Swdenk 111945219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 112045219c46Swdenk Define this to enable 32 bit addressing 112145219c46Swdenk 11223bb46d23SAshok CONFIG_SMC91111 1123f39748aeSwdenk Support for SMSC's LAN91C111 chip 1124f39748aeSwdenk 1125f39748aeSwdenk CONFIG_SMC91111_BASE 1126f39748aeSwdenk Define this to hold the physical address 1127f39748aeSwdenk of the device (I/O space) 1128f39748aeSwdenk 1129f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1130f39748aeSwdenk Define this if data bus is 32 bits 1131f39748aeSwdenk 1132f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1133f39748aeSwdenk Define this to use i/o functions instead of macros 1134f39748aeSwdenk (some hardware wont work with macros) 1135f39748aeSwdenk 1136dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1137dc02badaSHeiko Schocher Support for davinci emac 1138dc02badaSHeiko Schocher 1139dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1140dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1141dc02badaSHeiko Schocher 1142b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1143b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1144b3dbf4a5SMacpaul Lin 1145b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1146b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1147b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1148b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1149b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1150b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1151b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1152b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1153b3dbf4a5SMacpaul Lin 1154c2fff331SMike Rapoport CONFIG_SMC911X 1155557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1156557b377dSJens Gehrlein 1157c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1158557b377dSJens Gehrlein Define this to hold the physical address 1159557b377dSJens Gehrlein of the device (I/O space) 1160557b377dSJens Gehrlein 1161c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1162557b377dSJens Gehrlein Define this if data bus is 32 bits 1163557b377dSJens Gehrlein 1164c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1165557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1166557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1167c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1168557b377dSJens Gehrlein 11693d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 11703d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 11713d0075faSYoshihiro Shimoda 11723d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 11733d0075faSYoshihiro Shimoda Define the number of ports to be used 11743d0075faSYoshihiro Shimoda 11753d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 11763d0075faSYoshihiro Shimoda Define the ETH PHY's address 11773d0075faSYoshihiro Shimoda 117868260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 117968260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 118068260aabSYoshihiro Shimoda 11815e124724SVadim Bendebury- TPM Support: 11825e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 11835e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 11845e124724SVadim Bendebury per system is supported at this time. 11855e124724SVadim Bendebury 11865e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 11875e124724SVadim Bendebury Base address where the generic TPM device is mapped 11885e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 11895e124724SVadim Bendebury 0xfed40000. 11905e124724SVadim Bendebury 1191c609719bSwdenk- USB Support: 1192c609719bSwdenk At the moment only the UHCI host controller is 11934d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1194c609719bSwdenk CONFIG_USB_UHCI to enable it. 1195c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 119630d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1197c609719bSwdenk storage devices. 1198c609719bSwdenk Note: 1199c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1200c609719bSwdenk (TEAC FD-05PUB). 12014d13cbadSwdenk MPC5200 USB requires additional defines: 12024d13cbadSwdenk CONFIG_USB_CLOCK 12034d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1204307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1205307ecb6dSEric Millbrandt for USB on PSC3 12064d13cbadSwdenk CONFIG_USB_CONFIG 12074d13cbadSwdenk for differential drivers: 0x00001000 12084d13cbadSwdenk for single ended drivers: 0x00005000 1209307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1210307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 12116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1212fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1213fdcfaa1bSZhang Wei instead of using asynchronous interrupts 12144d13cbadSwdenk 12159ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 12169ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 12179ab4ce22SSimon Glass 121816c8d5e7SWolfgang Denk- USB Device: 121916c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 122016c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 122116c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 122211ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 122316c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 122416c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 122516c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 122616c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 122716c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 122816c8d5e7SWolfgang Denk a Linux host by 122916c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 123016c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 123116c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 123216c8d5e7SWolfgang Denk might be defined in YourBoardName.h 123316c8d5e7SWolfgang Denk 123416c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 123516c8d5e7SWolfgang Denk Define this to build a UDC device 123616c8d5e7SWolfgang Denk 123716c8d5e7SWolfgang Denk CONFIG_USB_TTY 123816c8d5e7SWolfgang Denk Define this to have a tty type of device available to 123916c8d5e7SWolfgang Denk talk to the UDC device 124016c8d5e7SWolfgang Denk 1241f9da0f89SVipin KUMAR CONFIG_USBD_HS 1242f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1243f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1244f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1245f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1246f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1247f9da0f89SVipin KUMAR speed. 1248f9da0f89SVipin KUMAR 12496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 125016c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 125116c8d5e7SWolfgang Denk be set to usbtty. 125216c8d5e7SWolfgang Denk 125316c8d5e7SWolfgang Denk mpc8xx: 12546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 125516c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 12566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 125716c8d5e7SWolfgang Denk 12586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 125916c8d5e7SWolfgang Denk Derive USB clock from brgclk 12606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 126116c8d5e7SWolfgang Denk 126216c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 126316c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 126416c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 126516c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 126616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 126716c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 126816c8d5e7SWolfgang Denk 126916c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 127016c8d5e7SWolfgang Denk Define this string as the name of your company for 127116c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 127216c8d5e7SWolfgang Denk 127316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 127416c8d5e7SWolfgang Denk Define this string as the name of your product 127516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 127616c8d5e7SWolfgang Denk 127716c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 127816c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 127916c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 128016c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 128116c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 128216c8d5e7SWolfgang Denk 128316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 128416c8d5e7SWolfgang Denk Define this as the unique Product ID 128516c8d5e7SWolfgang Denk for your device 128616c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1287c609719bSwdenk 1288d70a560fSIgor Grinberg- ULPI Layer Support: 1289d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1290d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1291d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1292d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1293d70a560fSIgor Grinberg viewport is supported. 1294d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1295d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 12966d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 12976d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 12986d365ea0SLucas Stach the appropriate value in Hz. 1299c609719bSwdenk 1300c609719bSwdenk- MMC Support: 1301c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1302c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1303c609719bSwdenk accessed from the boot prompt by mapping the device 1304c609719bSwdenk to physical memory similar to flash. Command line is 1305602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1306602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1307c609719bSwdenk 1308afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1309afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1310afb35666SYoshihiro Shimoda 1311afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1312afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1313afb35666SYoshihiro Shimoda 1314afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1315afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1316afb35666SYoshihiro Shimoda 13176705d81eSwdenk- Journaling Flash filesystem support: 13186705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 13196705d81eSwdenk CONFIG_JFFS2_NAND_DEV 13206705d81eSwdenk Define these for a default partition on a NAND device 13216705d81eSwdenk 13226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 13236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 13246705d81eSwdenk Define these for a default partition on a NOR device 13256705d81eSwdenk 13266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 13276705d81eSwdenk Define this to create an own partition. You have to provide a 13286705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 13296705d81eSwdenk 13306705d81eSwdenk If you define only one JFFS2 partition you may also want to 13316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 13326705d81eSwdenk to disable the command chpart. This is the default when you 13336705d81eSwdenk have not defined a custom partition 13346705d81eSwdenk 1335c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1336c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1337656f4c65SDonggeun Kim 1338656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1339656f4c65SDonggeun Kim file in FAT formatted partition. 1340656f4c65SDonggeun Kim 1341656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1342656f4c65SDonggeun Kim user to write files to FAT. 1343c30a15e5SDonggeun Kim 134484cd9327SGabe BlackCBFS (Coreboot Filesystem) support 134584cd9327SGabe Black CONFIG_CMD_CBFS 134684cd9327SGabe Black 134784cd9327SGabe Black Define this to enable support for reading from a Coreboot 134884cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 134984cd9327SGabe Black and cbfsload. 135084cd9327SGabe Black 1351c609719bSwdenk- Keyboard Support: 1352c609719bSwdenk CONFIG_ISA_KEYBOARD 1353c609719bSwdenk 1354c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1355c609719bSwdenk support 1356c609719bSwdenk 1357c609719bSwdenk CONFIG_I8042_KBD 1358c609719bSwdenk Standard PC keyboard driver with US (is default) and 1359c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1360c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1361c609719bSwdenk for cfb_console. Supports cursor blinking. 1362c609719bSwdenk 1363c609719bSwdenk- Video support: 1364c609719bSwdenk CONFIG_VIDEO 1365c609719bSwdenk 1366c609719bSwdenk Define this to enable video support (for output to 1367c609719bSwdenk video). 1368c609719bSwdenk 1369c609719bSwdenk CONFIG_VIDEO_CT69000 1370c609719bSwdenk 1371c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1372c609719bSwdenk 1373c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1374eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1375eeb1b77bSwdenk video output is selected via environment 'videoout' 1376eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1377eeb1b77bSwdenk assumed. 1378c609719bSwdenk 1379eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 138011ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1381eeb1b77bSwdenk are possible: 1382eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1383eeb1b77bSwdenk Following standard modes are supported (* is default): 1384eeb1b77bSwdenk 1385eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1386eeb1b77bSwdenk -------------+--------------------------------------------- 1387eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1388eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1389eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1390eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1391eeb1b77bSwdenk -------------+--------------------------------------------- 1392c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1393c609719bSwdenk 1394eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 13957817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1396eeb1b77bSwdenk 1397eeb1b77bSwdenk 1398a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1399a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1400a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1401a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1402a6c7ad2fSwdenk 14037d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 14047d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 14057d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 14067d3053fbSTimur Tabi support, and should also define these other macros: 14077d3053fbSTimur Tabi 14087d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 14097d3053fbSTimur Tabi CONFIG_VIDEO 14107d3053fbSTimur Tabi CONFIG_CMD_BMP 14117d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 14127d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 14137d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 14147d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 14157d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 14167d3053fbSTimur Tabi 1417ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1418ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1419ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1420ba8e76bdSTimur Tabi description of this variable. 14217d3053fbSTimur Tabi 1422058d59b0SSimon Glass CONFIG_VIDEO_VGA 1423058d59b0SSimon Glass 1424058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1425058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1426058d59b0SSimon Glass driver. 1427058d59b0SSimon Glass 1428058d59b0SSimon Glass 1429682011ffSwdenk- Keyboard Support: 1430682011ffSwdenk CONFIG_KEYBOARD 1431682011ffSwdenk 1432682011ffSwdenk Define this to enable a custom keyboard support. 1433682011ffSwdenk This simply calls drv_keyboard_init() which must be 1434682011ffSwdenk defined in your board-specific files. 1435682011ffSwdenk The only board using this so far is RBC823. 1436a6c7ad2fSwdenk 1437c609719bSwdenk- LCD Support: CONFIG_LCD 1438c609719bSwdenk 1439c609719bSwdenk Define this to enable LCD support (for output to LCD 1440c609719bSwdenk display); also select one of the supported displays 1441c609719bSwdenk by defining one of these: 1442c609719bSwdenk 144339cf4804SStelian Pop CONFIG_ATMEL_LCD: 144439cf4804SStelian Pop 144539cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 144639cf4804SStelian Pop 1447fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1448c609719bSwdenk 1449fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1450c609719bSwdenk 1451fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1452c609719bSwdenk 1453fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1454fd3103bbSwdenk Active, color, single scan. 1455fd3103bbSwdenk 1456fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1457fd3103bbSwdenk 1458fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1459c609719bSwdenk Active, color, single scan. 1460c609719bSwdenk 1461c609719bSwdenk CONFIG_SHARP_16x9 1462c609719bSwdenk 1463c609719bSwdenk Sharp 320x240. Active, color, single scan. 1464c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1465c609719bSwdenk 1466c609719bSwdenk CONFIG_SHARP_LQ64D341 1467c609719bSwdenk 1468c609719bSwdenk Sharp LQ64D341 display, 640x480. 1469c609719bSwdenk Active, color, single scan. 1470c609719bSwdenk 1471c609719bSwdenk CONFIG_HLD1045 1472c609719bSwdenk 1473c609719bSwdenk HLD1045 display, 640x480. 1474c609719bSwdenk Active, color, single scan. 1475c609719bSwdenk 1476c609719bSwdenk CONFIG_OPTREX_BW 1477c609719bSwdenk 1478c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1479c609719bSwdenk or 1480c609719bSwdenk Hitachi LMG6912RPFC-00T 1481c609719bSwdenk or 1482c609719bSwdenk Hitachi SP14Q002 1483c609719bSwdenk 1484c609719bSwdenk 320x240. Black & white. 1485c609719bSwdenk 1486c609719bSwdenk Normally display is black on white background; define 14876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1488c609719bSwdenk 1489676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1490676d319eSSimon Glass 1491676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1492676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1493676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1494676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1495676d319eSSimon Glass a per-section basis. 1496676d319eSSimon Glass 14970d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 14980d89efefSSimon Glass 14990d89efefSSimon Glass When the console need to be scrolled, this is the number of 15000d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 15010d89efefSSimon Glass the console jump but can help speed up operation when scrolling 15020d89efefSSimon Glass is slow. 1503676d319eSSimon Glass 150445d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 150545d7f525STom Wai-Hong Tam 150645d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 150745d7f525STom Wai-Hong Tam 1508735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1509735987c5STom Wai-Hong Tam 1510735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1511735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1512735987c5STom Wai-Hong Tam 15137152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1514d791b1dcSwdenk 1515d791b1dcSwdenk If this option is set, the environment is checked for 1516d791b1dcSwdenk a variable "splashimage". If found, the usual display 1517d791b1dcSwdenk of logo, copyright and system information on the LCD 1518e94d2cd9Swdenk is suppressed and the BMP image at the address 1519d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1520d791b1dcSwdenk console is redirected to the "nulldev", too. This 1521d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1522d791b1dcSwdenk loaded very quickly after power-on. 1523d791b1dcSwdenk 15241ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 15251ca298ceSMatthias Weisser 15261ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 15271ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 15281ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 15291ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 15301ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 15311ca298ceSMatthias Weisser specify 'm' for centering the image. 15321ca298ceSMatthias Weisser 15331ca298ceSMatthias Weisser Example: 15341ca298ceSMatthias Weisser setenv splashpos m,m 15351ca298ceSMatthias Weisser => image at center of screen 15361ca298ceSMatthias Weisser 15371ca298ceSMatthias Weisser setenv splashpos 30,20 15381ca298ceSMatthias Weisser => image at x = 30 and y = 20 15391ca298ceSMatthias Weisser 15401ca298ceSMatthias Weisser setenv splashpos -10,m 15411ca298ceSMatthias Weisser => vertically centered image 15421ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 15431ca298ceSMatthias Weisser 154498f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 154598f4a3dfSStefan Roese 154698f4a3dfSStefan Roese If this option is set, additionally to standard BMP 154798f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 154898f4a3dfSStefan Roese splashscreen support or the bmp command. 154998f4a3dfSStefan Roese 1550d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1551d5011762SAnatolij Gustschin 1552d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1553d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1554d5011762SAnatolij Gustschin bmp command. 1555d5011762SAnatolij Gustschin 1556f2b96dfbSLei Wen- Do compresssing for memory range: 1557f2b96dfbSLei Wen CONFIG_CMD_ZIP 1558f2b96dfbSLei Wen 1559f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1560f2b96dfbSLei Wen to compress the specified memory at its best effort. 1561f2b96dfbSLei Wen 1562c29fdfc1Swdenk- Compression support: 1563c29fdfc1Swdenk CONFIG_BZIP2 1564c29fdfc1Swdenk 1565c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1566c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1567c29fdfc1Swdenk compressed images are supported. 1568c29fdfc1Swdenk 1569c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 15706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1571c29fdfc1Swdenk be at least 4MB. 1572d791b1dcSwdenk 1573fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1574fc9c1727SLuigi 'Comio' Mantellini 1575fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1576fc9c1727SLuigi 'Comio' Mantellini images is included. 1577fc9c1727SLuigi 'Comio' Mantellini 1578fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1579fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1580fc9c1727SLuigi 'Comio' Mantellini formula: 1581fc9c1727SLuigi 'Comio' Mantellini 1582fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1583fc9c1727SLuigi 'Comio' Mantellini 1584fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1585fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1586fc9c1727SLuigi 'Comio' Mantellini 1587fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1588fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1589fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1590fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1591fc9c1727SLuigi 'Comio' Mantellini 1592fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1593fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 15946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1595fc9c1727SLuigi 'Comio' Mantellini 159617ea1177Swdenk- MII/PHY support: 159717ea1177Swdenk CONFIG_PHY_ADDR 159817ea1177Swdenk 159917ea1177Swdenk The address of PHY on MII bus. 160017ea1177Swdenk 160117ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 160217ea1177Swdenk 160317ea1177Swdenk The clock frequency of the MII bus 160417ea1177Swdenk 160517ea1177Swdenk CONFIG_PHY_GIGE 160617ea1177Swdenk 160717ea1177Swdenk If this option is set, support for speed/duplex 160811ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 160917ea1177Swdenk 161017ea1177Swdenk CONFIG_PHY_RESET_DELAY 161117ea1177Swdenk 161217ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 161317ea1177Swdenk reset before any MII register access is possible. 161417ea1177Swdenk For such PHY, set this option to the usec delay 161517ea1177Swdenk required. (minimum 300usec for LXT971A) 161617ea1177Swdenk 161717ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 161817ea1177Swdenk 161917ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 162017ea1177Swdenk command issued before MII status register can be read 162117ea1177Swdenk 1622c609719bSwdenk- Ethernet address: 1623c609719bSwdenk CONFIG_ETHADDR 1624c68a05feSrichardretanubun CONFIG_ETH1ADDR 1625c609719bSwdenk CONFIG_ETH2ADDR 1626c609719bSwdenk CONFIG_ETH3ADDR 1627c68a05feSrichardretanubun CONFIG_ETH4ADDR 1628c68a05feSrichardretanubun CONFIG_ETH5ADDR 1629c609719bSwdenk 163011ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 163111ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1632c609719bSwdenk is not determined automatically. 1633c609719bSwdenk 1634c609719bSwdenk- IP address: 1635c609719bSwdenk CONFIG_IPADDR 1636c609719bSwdenk 1637c609719bSwdenk Define a default value for the IP address to use for 163811ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1639c609719bSwdenk determined through e.g. bootp. 16401ebcd654SWolfgang Denk (Environment variable "ipaddr") 1641c609719bSwdenk 1642c609719bSwdenk- Server IP address: 1643c609719bSwdenk CONFIG_SERVERIP 1644c609719bSwdenk 1645c609719bSwdenk Defines a default value for the IP address of a TFTP 1646c609719bSwdenk server to contact when using the "tftboot" command. 16471ebcd654SWolfgang Denk (Environment variable "serverip") 1648c609719bSwdenk 164997cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 165097cfe861SRobin Getz 165197cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 165297cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 165397cfe861SRobin Getz 16541ebcd654SWolfgang Denk- Gateway IP address: 16551ebcd654SWolfgang Denk CONFIG_GATEWAYIP 16561ebcd654SWolfgang Denk 16571ebcd654SWolfgang Denk Defines a default value for the IP address of the 16581ebcd654SWolfgang Denk default router where packets to other networks are 16591ebcd654SWolfgang Denk sent to. 16601ebcd654SWolfgang Denk (Environment variable "gatewayip") 16611ebcd654SWolfgang Denk 16621ebcd654SWolfgang Denk- Subnet mask: 16631ebcd654SWolfgang Denk CONFIG_NETMASK 16641ebcd654SWolfgang Denk 16651ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 16661ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 16671ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 16681ebcd654SWolfgang Denk forwarded through a router. 16691ebcd654SWolfgang Denk (Environment variable "netmask") 16701ebcd654SWolfgang Denk 167153a5c424SDavid Updegraff- Multicast TFTP Mode: 167253a5c424SDavid Updegraff CONFIG_MCAST_TFTP 167353a5c424SDavid Updegraff 167453a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 167553a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 167611ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 167753a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 167853a5c424SDavid Updegraff multicast group. 167953a5c424SDavid Updegraff 1680c609719bSwdenk- BOOTP Recovery Mode: 1681c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1682c609719bSwdenk 1683c609719bSwdenk If you have many targets in a network that try to 1684c609719bSwdenk boot using BOOTP, you may want to avoid that all 1685c609719bSwdenk systems send out BOOTP requests at precisely the same 1686c609719bSwdenk moment (which would happen for instance at recovery 1687c609719bSwdenk from a power failure, when all systems will try to 1688c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1689c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1690c609719bSwdenk inserted before sending out BOOTP requests. The 16916c33c785SWolfgang Denk following delays are inserted then: 1692c609719bSwdenk 1693c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1694c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1695c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1696c609719bSwdenk 4th and following 1697c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1698c609719bSwdenk 1699fe389a82Sstroese- DHCP Advanced Options: 17001fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 17011fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1702fe389a82Sstroese 17031fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 17041fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 17051fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 17061fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 17071fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 17081fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 17091fe80d79SJon Loeliger CONFIG_BOOTP_DNS 17101fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 17111fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 17121fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 17131fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 17141fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 17152c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1716fe389a82Sstroese 17175d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 17185d110f0aSWilson Callan environment variable, not the BOOTP server. 1719fe389a82Sstroese 17202c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 17212c00e099SJoe Hershberger after the configured retry count, the call will fail 17222c00e099SJoe Hershberger instead of starting over. This can be used to fail over 17232c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 17242c00e099SJoe Hershberger is not available. 17252c00e099SJoe Hershberger 1726fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1727fe389a82Sstroese serverip from a DHCP server, it is possible that more 1728fe389a82Sstroese than one DNS serverip is offered to the client. 1729fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1730fe389a82Sstroese serverip will be stored in the additional environment 1731fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1732fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 17331fe80d79SJon Loeliger is defined. 1734fe389a82Sstroese 1735fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1736fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1737fe389a82Sstroese need the hostname of the DHCP requester. 17385d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 17391fe80d79SJon Loeliger of the "hostname" environment variable is passed as 17401fe80d79SJon Loeliger option 12 to the DHCP server. 1741fe389a82Sstroese 1742d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1743d9a2f416SAras Vaichas 1744d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1745d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1746d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1747d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1748d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1749d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1750d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1751d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1752d9a2f416SAras Vaichas that one of the retries will be successful but note that 1753d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1754d9a2f416SAras Vaichas this delay. 1755d9a2f416SAras Vaichas 1756d22c338eSJoe Hershberger - Link-local IP address negotiation: 1757d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1758d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1759d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1760d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1761d22c338eSJoe Hershberger 1762d22c338eSJoe Hershberger See doc/README.link-local for more information. 1763d22c338eSJoe Hershberger 1764a3d991bdSwdenk - CDP Options: 1765a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1766a3d991bdSwdenk 1767a3d991bdSwdenk The device id used in CDP trigger frames. 1768a3d991bdSwdenk 1769a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1770a3d991bdSwdenk 1771a3d991bdSwdenk A two character string which is prefixed to the MAC address 1772a3d991bdSwdenk of the device. 1773a3d991bdSwdenk 1774a3d991bdSwdenk CONFIG_CDP_PORT_ID 1775a3d991bdSwdenk 1776a3d991bdSwdenk A printf format string which contains the ascii name of 1777a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 177811ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1779a3d991bdSwdenk 1780a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1781a3d991bdSwdenk 1782a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1783a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1784a3d991bdSwdenk 1785a3d991bdSwdenk CONFIG_CDP_VERSION 1786a3d991bdSwdenk 1787a3d991bdSwdenk An ascii string containing the version of the software. 1788a3d991bdSwdenk 1789a3d991bdSwdenk CONFIG_CDP_PLATFORM 1790a3d991bdSwdenk 1791a3d991bdSwdenk An ascii string containing the name of the platform. 1792a3d991bdSwdenk 1793a3d991bdSwdenk CONFIG_CDP_TRIGGER 1794a3d991bdSwdenk 1795a3d991bdSwdenk A 32bit integer sent on the trigger. 1796a3d991bdSwdenk 1797a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1798a3d991bdSwdenk 1799a3d991bdSwdenk A 16bit integer containing the power consumption of the 1800a3d991bdSwdenk device in .1 of milliwatts. 1801a3d991bdSwdenk 1802a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1803a3d991bdSwdenk 1804a3d991bdSwdenk A byte containing the id of the VLAN. 1805a3d991bdSwdenk 1806c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1807c609719bSwdenk 1808c609719bSwdenk Several configurations allow to display the current 1809c609719bSwdenk status using a LED. For instance, the LED will blink 1810c609719bSwdenk fast while running U-Boot code, stop blinking as 1811c609719bSwdenk soon as a reply to a BOOTP request was received, and 1812c609719bSwdenk start blinking slow once the Linux kernel is running 1813c609719bSwdenk (supported by a status LED driver in the Linux 1814c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1815c609719bSwdenk feature in U-Boot. 1816c609719bSwdenk 1817c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1818c609719bSwdenk 1819c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1820c609719bSwdenk on those systems that support this (optional) 1821c609719bSwdenk feature, like the TQM8xxL modules. 1822c609719bSwdenk 1823c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1824c609719bSwdenk 1825b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1826b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 182711ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1828c609719bSwdenk 1829b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1830602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1831b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1832b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1833c609719bSwdenk command line interface. 1834c609719bSwdenk 1835bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1836c609719bSwdenk 1837b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1838b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1839b37c7e5eSwdenk support for I2C. 1840c609719bSwdenk 1841b37c7e5eSwdenk There are several other quantities that must also be 1842b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1843c609719bSwdenk 18446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1845b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 18466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 184711ccc33fSMarcel Ziswiler the CPU's i2c node address). 1848c609719bSwdenk 18498d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1850a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 18518d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 18528d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 18538d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1854b37c7e5eSwdenk 18555da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 18565da71efaSEric Millbrandt 18575da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 18585da71efaSEric Millbrandt chips might think that the current transfer is still 18595da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 18605da71efaSEric Millbrandt commands until the slave device responds. 18615da71efaSEric Millbrandt 1862b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1863b37c7e5eSwdenk 1864b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1865b37c7e5eSwdenk then the following macros need to be defined (examples are 1866b37c7e5eSwdenk from include/configs/lwmon.h): 1867c609719bSwdenk 1868c609719bSwdenk I2C_INIT 1869c609719bSwdenk 1870b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1871c609719bSwdenk controller or configure ports. 1872c609719bSwdenk 1873b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1874b37c7e5eSwdenk 1875c609719bSwdenk I2C_PORT 1876c609719bSwdenk 1877c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1878c609719bSwdenk assumes both bits are on the same port). Valid values 1879c609719bSwdenk are 0..3 for ports A..D. 1880c609719bSwdenk 1881c609719bSwdenk I2C_ACTIVE 1882c609719bSwdenk 1883c609719bSwdenk The code necessary to make the I2C data line active 1884c609719bSwdenk (driven). If the data line is open collector, this 1885c609719bSwdenk define can be null. 1886c609719bSwdenk 1887b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1888b37c7e5eSwdenk 1889c609719bSwdenk I2C_TRISTATE 1890c609719bSwdenk 1891c609719bSwdenk The code necessary to make the I2C data line tri-stated 1892c609719bSwdenk (inactive). If the data line is open collector, this 1893c609719bSwdenk define can be null. 1894c609719bSwdenk 1895b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1896b37c7e5eSwdenk 1897c609719bSwdenk I2C_READ 1898c609719bSwdenk 1899c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1900c609719bSwdenk FALSE if it is low. 1901c609719bSwdenk 1902b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1903b37c7e5eSwdenk 1904c609719bSwdenk I2C_SDA(bit) 1905c609719bSwdenk 1906c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1907c609719bSwdenk is FALSE, it clears it (low). 1908c609719bSwdenk 1909b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1910b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1911b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1912b37c7e5eSwdenk 1913c609719bSwdenk I2C_SCL(bit) 1914c609719bSwdenk 1915c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1916c609719bSwdenk is FALSE, it clears it (low). 1917c609719bSwdenk 1918b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1919b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1920b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1921b37c7e5eSwdenk 1922c609719bSwdenk I2C_DELAY 1923c609719bSwdenk 1924c609719bSwdenk This delay is invoked four times per clock cycle so this 1925c609719bSwdenk controls the rate of data transfer. The data rate thus 1926b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1927b37c7e5eSwdenk like: 1928b37c7e5eSwdenk 1929b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1930c609719bSwdenk 1931793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1932793b5726SMike Frysinger 1933793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1934793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1935793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1936793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1937793b5726SMike Frysinger 1938793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1939793b5726SMike Frysinger the generic GPIO functions. 1940793b5726SMike Frysinger 19416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 194247cd00faSwdenk 194347cd00faSwdenk When a board is reset during an i2c bus transfer 194447cd00faSwdenk chips might think that the current transfer is still 194547cd00faSwdenk in progress. On some boards it is possible to access 194647cd00faSwdenk the i2c SCLK line directly, either by using the 194747cd00faSwdenk processor pin as a GPIO or by having a second pin 194847cd00faSwdenk connected to the bus. If this option is defined a 194947cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 195047cd00faSwdenk is run early in the boot sequence. 195147cd00faSwdenk 195226a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 195326a33504SRichard Retanubun 195426a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 195526a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 195626a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 195726a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 195826a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 195926a33504SRichard Retanubun controller provide such a method. It is called at the end of 196026a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 196126a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 196226a33504SRichard Retanubun 196317ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 196417ea1177Swdenk 196517ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 196617ea1177Swdenk in u-boot bd_info structure based on u-boot environment 196717ea1177Swdenk variable "i2cfast". (see also i2cfast) 196817ea1177Swdenk 1969bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1970bb99ad6dSBen Warren 1971bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1972bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1973bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1974bb99ad6dSBen Warren Note that bus numbering is zero-based. 1975bb99ad6dSBen Warren 19766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1977bb99ad6dSBen Warren 1978bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 19790f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 19800f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 19810f89c54bSPeter Tyser a 1D array of device addresses 1982bb99ad6dSBen Warren 1983bb99ad6dSBen Warren e.g. 1984bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 19856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1986bb99ad6dSBen Warren 1987bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1988bb99ad6dSBen Warren 1989bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 19906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1991bb99ad6dSBen Warren 1992bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1993bb99ad6dSBen Warren 19946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1995be5e6181STimur Tabi 1996be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1997be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1998be5e6181STimur Tabi 19996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 20000dc018ecSStefan Roese 20010dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 20020dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 20030dc018ecSStefan Roese 20046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 20050dc018ecSStefan Roese 20060dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 20070dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 20080dc018ecSStefan Roese 20096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 20109ebbb54fSVictor Gallardo 20119ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 20129ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 20139ebbb54fSVictor Gallardo specified DTT device. 20149ebbb54fSVictor Gallardo 2015be5e6181STimur Tabi CONFIG_FSL_I2C 2016be5e6181STimur Tabi 2017be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 20187817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 2019be5e6181STimur Tabi 202067b23a32SHeiko Schocher CONFIG_I2C_MUX 202167b23a32SHeiko Schocher 202267b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 202367b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 202467b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 202567b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 202667b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 202767b23a32SHeiko Schocher the muxes to activate this new "bus". 202867b23a32SHeiko Schocher 202967b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 203067b23a32SHeiko Schocher feature! 203167b23a32SHeiko Schocher 203267b23a32SHeiko Schocher Example: 203367b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 203467b23a32SHeiko Schocher The First mux with address 70 and channel 6 203567b23a32SHeiko Schocher The Second mux with address 71 and channel 4 203667b23a32SHeiko Schocher 203767b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 203867b23a32SHeiko Schocher 203967b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 204067b23a32SHeiko Schocher of I2C Busses with muxes: 204167b23a32SHeiko Schocher 204267b23a32SHeiko Schocher => i2c bus 204367b23a32SHeiko Schocher Busses reached over muxes: 204467b23a32SHeiko Schocher Bus ID: 2 204567b23a32SHeiko Schocher reached over Mux(es): 204667b23a32SHeiko Schocher pca9544a@70 ch: 4 204767b23a32SHeiko Schocher Bus ID: 3 204867b23a32SHeiko Schocher reached over Mux(es): 204967b23a32SHeiko Schocher pca9544a@70 ch: 6 205067b23a32SHeiko Schocher pca9544a@71 ch: 4 205167b23a32SHeiko Schocher => 205267b23a32SHeiko Schocher 205367b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 2054f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 2055f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 205667b23a32SHeiko Schocher the channel 4. 205767b23a32SHeiko Schocher 205867b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 2059f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 206067b23a32SHeiko Schocher the 2 muxes. 206167b23a32SHeiko Schocher 206267b23a32SHeiko Schocher This option is actually implemented for the bitbanging 206367b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 206467b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 206567b23a32SHeiko Schocher to add this option to other architectures. 206667b23a32SHeiko Schocher 20672ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 20682ac6985aSAndrew Dyer 20692ac6985aSAndrew Dyer defining this will force the i2c_read() function in 20702ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 20712ac6985aSAndrew Dyer between writing the address pointer and reading the 20722ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 20732ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 20742ac6985aSAndrew Dyer devices can use either method, but some require one or 20752ac6985aSAndrew Dyer the other. 2076be5e6181STimur Tabi 2077c609719bSwdenk- SPI Support: CONFIG_SPI 2078c609719bSwdenk 2079c609719bSwdenk Enables SPI driver (so far only tested with 2080c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2081c609719bSwdenk D/As on the SACSng board) 2082c609719bSwdenk 20836639562eSYoshihiro Shimoda CONFIG_SH_SPI 20846639562eSYoshihiro Shimoda 20856639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 20866639562eSYoshihiro Shimoda only SH7757 is supported. 20876639562eSYoshihiro Shimoda 2088c609719bSwdenk CONFIG_SPI_X 2089c609719bSwdenk 2090c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2091c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2092c609719bSwdenk 2093c609719bSwdenk CONFIG_SOFT_SPI 2094c609719bSwdenk 2095c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2096c609719bSwdenk using hardware support. This is a general purpose 2097c609719bSwdenk driver that only requires three general I/O port pins 2098c609719bSwdenk (two outputs, one input) to function. If this is 2099c609719bSwdenk defined, the board configuration must define several 2100c609719bSwdenk SPI configuration items (port pins to use, etc). For 2101c609719bSwdenk an example, see include/configs/sacsng.h. 2102c609719bSwdenk 210304a9e118SBen Warren CONFIG_HARD_SPI 210404a9e118SBen Warren 210504a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 210604a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 210704a9e118SBen Warren must define a list of chip-select function pointers. 210804a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 210904a9e118SBen Warren example, see include/configs/mpc8349emds.h. 211004a9e118SBen Warren 211138254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 211238254f45SGuennadi Liakhovetski 211338254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 21142e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 211538254f45SGuennadi Liakhovetski 21160133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 21170133502eSMatthias Fuchs 21180133502eSMatthias Fuchs Enables FPGA subsystem. 21190133502eSMatthias Fuchs 21200133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 21210133502eSMatthias Fuchs 21220133502eSMatthias Fuchs Enables support for specific chip vendors. 21230133502eSMatthias Fuchs (ALTERA, XILINX) 21240133502eSMatthias Fuchs 21250133502eSMatthias Fuchs CONFIG_FPGA_<family> 21260133502eSMatthias Fuchs 21270133502eSMatthias Fuchs Enables support for FPGA family. 21280133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 21290133502eSMatthias Fuchs 21300133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2131c609719bSwdenk 2132c609719bSwdenk Specify the number of FPGA devices to support. 2133c609719bSwdenk 21346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2135c609719bSwdenk 2136c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2137c609719bSwdenk 21386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2139c609719bSwdenk 2140c609719bSwdenk Enable checks on FPGA configuration interface busy 2141c609719bSwdenk status by the configuration function. This option 2142c609719bSwdenk will require a board or device specific function to 2143c609719bSwdenk be written. 2144c609719bSwdenk 2145c609719bSwdenk CONFIG_FPGA_DELAY 2146c609719bSwdenk 2147c609719bSwdenk If defined, a function that provides delays in the FPGA 2148c609719bSwdenk configuration driver. 2149c609719bSwdenk 21506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2151c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2152c609719bSwdenk 21536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2154c609719bSwdenk 2155c609719bSwdenk Check for configuration errors during FPGA bitfile 2156c609719bSwdenk loading. For example, abort during Virtex II 2157c609719bSwdenk configuration if the INIT_B line goes low (which 2158c609719bSwdenk indicated a CRC error). 2159c609719bSwdenk 21606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2161c609719bSwdenk 2162c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2163c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2164c609719bSwdenk FPGA configuration sequence. The default time is 500 216511ccc33fSMarcel Ziswiler ms. 2166c609719bSwdenk 21676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2168c609719bSwdenk 2169c609719bSwdenk Maximum time to wait for BUSY to deassert during 217011ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2171c609719bSwdenk 21726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2173c609719bSwdenk 2174c609719bSwdenk Time to wait after FPGA configuration. The default is 217511ccc33fSMarcel Ziswiler 200 ms. 2176c609719bSwdenk 2177c609719bSwdenk- Configuration Management: 2178c609719bSwdenk CONFIG_IDENT_STRING 2179c609719bSwdenk 2180c609719bSwdenk If defined, this string will be added to the U-Boot 2181c609719bSwdenk version information (U_BOOT_VERSION) 2182c609719bSwdenk 2183c609719bSwdenk- Vendor Parameter Protection: 2184c609719bSwdenk 2185c609719bSwdenk U-Boot considers the values of the environment 2186c609719bSwdenk variables "serial#" (Board Serial Number) and 21877152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2188c609719bSwdenk are set once by the board vendor / manufacturer, and 2189c609719bSwdenk protects these variables from casual modification by 2190c609719bSwdenk the user. Once set, these variables are read-only, 2191c609719bSwdenk and write or delete attempts are rejected. You can 219211ccc33fSMarcel Ziswiler change this behaviour: 2193c609719bSwdenk 2194c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2195c609719bSwdenk file, the write protection for vendor parameters is 219647cd00faSwdenk completely disabled. Anybody can change or delete 2197c609719bSwdenk these parameters. 2198c609719bSwdenk 2199c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2200c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 220111ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2202c609719bSwdenk which can be changed exactly ONCE by the user. [The 2203c609719bSwdenk serial# is unaffected by this, i. e. it remains 2204c609719bSwdenk read-only.] 2205c609719bSwdenk 22062598090bSJoe Hershberger The same can be accomplished in a more flexible way 22072598090bSJoe Hershberger for any variable by configuring the type of access 22082598090bSJoe Hershberger to allow for those variables in the ".flags" variable 22092598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 22102598090bSJoe Hershberger 2211c609719bSwdenk- Protected RAM: 2212c609719bSwdenk CONFIG_PRAM 2213c609719bSwdenk 2214c609719bSwdenk Define this variable to enable the reservation of 2215c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2216c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2217c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2218c609719bSwdenk this default value by defining an environment 2219c609719bSwdenk variable "pram" to the number of kB you want to 2220c609719bSwdenk reserve. Note that the board info structure will 2221c609719bSwdenk still show the full amount of RAM. If pRAM is 2222c609719bSwdenk reserved, a new environment variable "mem" will 2223c609719bSwdenk automatically be defined to hold the amount of 2224c609719bSwdenk remaining RAM in a form that can be passed as boot 2225c609719bSwdenk argument to Linux, for instance like that: 2226c609719bSwdenk 2227fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2228c609719bSwdenk saveenv 2229c609719bSwdenk 2230c609719bSwdenk This way you can tell Linux not to use this memory, 2231c609719bSwdenk either, which results in a memory region that will 2232c609719bSwdenk not be affected by reboots. 2233c609719bSwdenk 2234c609719bSwdenk *WARNING* If your board configuration uses automatic 2235c609719bSwdenk detection of the RAM size, you must make sure that 2236c609719bSwdenk this memory test is non-destructive. So far, the 2237c609719bSwdenk following board configurations are known to be 2238c609719bSwdenk "pRAM-clean": 2239c609719bSwdenk 22401b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 22411b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2242544d97e9SWolfgang Denk FLAGADM, TQM8260 2243c609719bSwdenk 224440fef049SGabe Black- Access to physical memory region (> 4GB) 224540fef049SGabe Black Some basic support is provided for operations on memory not 224640fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 224740fef049SGabe Black support access to more than 4GB of memory on 32-bit 224840fef049SGabe Black machines using physical address extension or similar. 224940fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 225040fef049SGabe Black currently only supports clearing the memory. 225140fef049SGabe Black 2252c609719bSwdenk- Error Recovery: 2253c609719bSwdenk CONFIG_PANIC_HANG 2254c609719bSwdenk 2255c609719bSwdenk Define this variable to stop the system in case of a 2256c609719bSwdenk fatal error, so that you have to reset it manually. 2257c609719bSwdenk This is probably NOT a good idea for an embedded 225811ccc33fSMarcel Ziswiler system where you want the system to reboot 2259c609719bSwdenk automatically as fast as possible, but it may be 2260c609719bSwdenk useful during development since you can try to debug 2261c609719bSwdenk the conditions that lead to the situation. 2262c609719bSwdenk 2263c609719bSwdenk CONFIG_NET_RETRY_COUNT 2264c609719bSwdenk 2265c609719bSwdenk This variable defines the number of retries for 2266c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2267c609719bSwdenk before giving up the operation. If not defined, a 2268c609719bSwdenk default value of 5 is used. 2269c609719bSwdenk 227040cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 227140cb90eeSGuennadi Liakhovetski 227240cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 227340cb90eeSGuennadi Liakhovetski 227448a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 227548a3e999STetsuyuki Kobayashi 227648a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 227748a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 227848a3e999STetsuyuki Kobayashi try longer timeout such as 227948a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 228048a3e999STetsuyuki Kobayashi 2281c609719bSwdenk- Command Interpreter: 22828078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 228304a85b3bSwdenk 228404a85b3bSwdenk Enable auto completion of commands using TAB. 228504a85b3bSwdenk 22868078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 22878078f1a5SWolfgang Denk for the "hush" shell. 22888078f1a5SWolfgang Denk 22898078f1a5SWolfgang Denk 22906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2291c609719bSwdenk 2292c609719bSwdenk Define this variable to enable the "hush" shell (from 2293c609719bSwdenk Busybox) as command line interpreter, thus enabling 2294c609719bSwdenk powerful command line syntax like 2295c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2296c609719bSwdenk constructs ("shell scripts"). 2297c609719bSwdenk 2298c609719bSwdenk If undefined, you get the old, much simpler behaviour 2299c609719bSwdenk with a somewhat smaller memory footprint. 2300c609719bSwdenk 2301c609719bSwdenk 23026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2303c609719bSwdenk 2304c609719bSwdenk This defines the secondary prompt string, which is 2305c609719bSwdenk printed when the command interpreter needs more input 2306c609719bSwdenk to complete a command. Usually "> ". 2307c609719bSwdenk 2308c609719bSwdenk Note: 2309c609719bSwdenk 2310c609719bSwdenk In the current implementation, the local variables 2311c609719bSwdenk space and global environment variables space are 2312c609719bSwdenk separated. Local variables are those you define by 23133b57fe0aSwdenk simply typing `name=value'. To access a local 2314c609719bSwdenk variable later on, you have write `$name' or 23153b57fe0aSwdenk `${name}'; to execute the contents of a variable 23163b57fe0aSwdenk directly type `$name' at the command prompt. 2317c609719bSwdenk 2318c609719bSwdenk Global environment variables are those you use 2319c609719bSwdenk setenv/printenv to work with. To run a command stored 2320c609719bSwdenk in such a variable, you need to use the run command, 2321c609719bSwdenk and you must not use the '$' sign to access them. 2322c609719bSwdenk 2323c609719bSwdenk To store commands and special characters in a 2324c609719bSwdenk variable, please use double quotation marks 2325c609719bSwdenk surrounding the whole text of the variable, instead 2326c609719bSwdenk of the backslashes before semicolons and special 2327c609719bSwdenk symbols. 2328c609719bSwdenk 2329aa0c71acSWolfgang Denk- Commandline Editing and History: 2330aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2331aa0c71acSWolfgang Denk 233211ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2333aa0c71acSWolfgang Denk commandline input operations 2334aa0c71acSWolfgang Denk 2335a8c7c708Swdenk- Default Environment: 2336c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2337c609719bSwdenk 2338c609719bSwdenk Define this to contain any number of null terminated 2339c609719bSwdenk strings (variable = value pairs) that will be part of 23407152b1d0Swdenk the default environment compiled into the boot image. 23412262cfeeSwdenk 2342c609719bSwdenk For example, place something like this in your 2343c609719bSwdenk board's config file: 2344c609719bSwdenk 2345c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2346c609719bSwdenk "myvar1=value1\0" \ 2347c609719bSwdenk "myvar2=value2\0" 2348c609719bSwdenk 2349c609719bSwdenk Warning: This method is based on knowledge about the 2350c609719bSwdenk internal format how the environment is stored by the 23512262cfeeSwdenk U-Boot code. This is NOT an official, exported 2352c609719bSwdenk interface! Although it is unlikely that this format 23537152b1d0Swdenk will change soon, there is no guarantee either. 2354c609719bSwdenk You better know what you are doing here. 2355c609719bSwdenk 2356c609719bSwdenk Note: overly (ab)use of the default environment is 2357c609719bSwdenk discouraged. Make sure to check other ways to preset 235874de7aefSWolfgang Denk the environment like the "source" command or the 2359c609719bSwdenk boot command first. 2360c609719bSwdenk 23615e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 23625e724ca2SStephen Warren 23635e724ca2SStephen Warren Define this in order to add variables describing the 23645e724ca2SStephen Warren U-Boot build configuration to the default environment. 23655e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 23665e724ca2SStephen Warren 23675e724ca2SStephen Warren Enabling this option will cause the following to be defined: 23685e724ca2SStephen Warren 23695e724ca2SStephen Warren - CONFIG_SYS_ARCH 23705e724ca2SStephen Warren - CONFIG_SYS_CPU 23715e724ca2SStephen Warren - CONFIG_SYS_BOARD 23725e724ca2SStephen Warren - CONFIG_SYS_VENDOR 23735e724ca2SStephen Warren - CONFIG_SYS_SOC 23745e724ca2SStephen Warren 23757e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 23767e27f89fSTom Rini 23777e27f89fSTom Rini Define this in order to add variables describing certain 23787e27f89fSTom Rini run-time determined information about the hardware to the 23797e27f89fSTom Rini environment. These will be named board_name, board_rev. 23807e27f89fSTom Rini 238106fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 238206fd8538SSimon Glass 238306fd8538SSimon Glass Normally the environment is loaded when the board is 238406fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 238506fd8538SSimon Glass that so that the environment is not available until 238606fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 238706fd8538SSimon Glass this is instead controlled by the value of 238806fd8538SSimon Glass /config/load-environment. 238906fd8538SSimon Glass 2390a8c7c708Swdenk- DataFlash Support: 23912abbe075Swdenk CONFIG_HAS_DATAFLASH 23922abbe075Swdenk 23932abbe075Swdenk Defining this option enables DataFlash features and 23942abbe075Swdenk allows to read/write in Dataflash via the standard 23952abbe075Swdenk commands cp, md... 23962abbe075Swdenk 2397f61ec45eSEric Nelson- Serial Flash support 2398f61ec45eSEric Nelson CONFIG_CMD_SF 2399f61ec45eSEric Nelson 2400f61ec45eSEric Nelson Defining this option enables SPI flash commands 2401f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2402f61ec45eSEric Nelson 2403f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2404f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2405f61ec45eSEric Nelson commands. 2406f61ec45eSEric Nelson 2407f61ec45eSEric Nelson The following defaults may be provided by the platform 2408f61ec45eSEric Nelson to handle the common case when only a single serial 2409f61ec45eSEric Nelson flash is present on the system. 2410f61ec45eSEric Nelson 2411f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2412f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2413f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2414f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2415f61ec45eSEric Nelson 24163f85ce27Swdenk- SystemACE Support: 24173f85ce27Swdenk CONFIG_SYSTEMACE 24183f85ce27Swdenk 24193f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 24203f85ce27Swdenk chips attached via some sort of local bus. The address 242111ccc33fSMarcel Ziswiler of the chip must also be defined in the 24226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 24233f85ce27Swdenk 24243f85ce27Swdenk #define CONFIG_SYSTEMACE 24256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 24263f85ce27Swdenk 24273f85ce27Swdenk When SystemACE support is added, the "ace" device type 24283f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 24293f85ce27Swdenk 2430ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2431ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2432ecb0ccd9SWolfgang Denk 243328cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2434ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 243528cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2436ecb0ccd9SWolfgang Denk number generator is used. 2437ecb0ccd9SWolfgang Denk 243828cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 243928cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 244028cb9375SWolfgang Denk defined, the normal port 69 is used. 244128cb9375SWolfgang Denk 244228cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2443ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2444ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2445ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2446ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2447ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2448ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2449ecb0ccd9SWolfgang Denk 2450bf36c5d5SSimon Glass- Hashing support: 2451bf36c5d5SSimon Glass CONFIG_CMD_HASH 2452bf36c5d5SSimon Glass 2453bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2454bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2455bf36c5d5SSimon Glass 2456bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2457bf36c5d5SSimon Glass 2458bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2459bf36c5d5SSimon Glass size a little. 2460bf36c5d5SSimon Glass 2461bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2462bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2463bf36c5d5SSimon Glass 2464bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2465bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2466bf36c5d5SSimon Glass 2467a8c7c708Swdenk- Show boot progress: 2468c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2469c609719bSwdenk 2470c609719bSwdenk Defining this option allows to add some board- 2471c609719bSwdenk specific code (calling a user-provided function 2472c609719bSwdenk "show_boot_progress(int)") that enables you to show 2473c609719bSwdenk the system's boot progress on some display (for 2474c609719bSwdenk example, some LED's) on your board. At the moment, 2475c609719bSwdenk the following checkpoints are implemented: 2476c609719bSwdenk 24773a608ca0SSimon Glass- Detailed boot stage timing 24783a608ca0SSimon Glass CONFIG_BOOTSTAGE 24793a608ca0SSimon Glass Define this option to get detailed timing of each stage 24803a608ca0SSimon Glass of the boot process. 24813a608ca0SSimon Glass 24823a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 24833a608ca0SSimon Glass This is the number of available user bootstage records. 24843a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 24853a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 24863a608ca0SSimon Glass the limit, recording will stop. 24873a608ca0SSimon Glass 24883a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 24893a608ca0SSimon Glass Define this to print a report before boot, similar to this: 24903a608ca0SSimon Glass 24913a608ca0SSimon Glass Timer summary in microseconds: 24923a608ca0SSimon Glass Mark Elapsed Stage 24933a608ca0SSimon Glass 0 0 reset 24943a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 24953a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 24963a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 24973a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 24983a608ca0SSimon Glass 3,910,375 250,777 main_loop 24993a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 25003a608ca0SSimon Glass 30,361,327 445,160 start_kernel 25013a608ca0SSimon Glass 25022eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 25032eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 25042eba38cfSSimon Glass and un/stashing of bootstage data. 25052eba38cfSSimon Glass 250694fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 250794fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 250894fd1316SSimon Glass node is created with each bootstage id as a child. Each child 250994fd1316SSimon Glass has a 'name' property and either 'mark' containing the 251094fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 251194fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 251294fd1316SSimon Glass For example: 251394fd1316SSimon Glass 251494fd1316SSimon Glass bootstage { 251594fd1316SSimon Glass 154 { 251694fd1316SSimon Glass name = "board_init_f"; 251794fd1316SSimon Glass mark = <3575678>; 251894fd1316SSimon Glass }; 251994fd1316SSimon Glass 170 { 252094fd1316SSimon Glass name = "lcd"; 252194fd1316SSimon Glass accum = <33482>; 252294fd1316SSimon Glass }; 252394fd1316SSimon Glass }; 252494fd1316SSimon Glass 252594fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 252694fd1316SSimon Glass 25271372cce2SMarian BalakowiczLegacy uImage format: 25281372cce2SMarian Balakowicz 2529c609719bSwdenk Arg Where When 2530c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2531c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2532c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2533c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2534c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2535c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2536c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2537c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2538c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 25391372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2540c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2541c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2542c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2543c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 25441372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2545c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 25461372cce2SMarian Balakowicz 25471372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 25481372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 25491372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 25501372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 25511372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 25521372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 25531372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 255411ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 25551372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 25561372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 25571372cce2SMarian Balakowicz 2558ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2559c609719bSwdenk 2560a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 256163e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 256263e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 256363e73c9aSwdenk 2564566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2565566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2566566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2567566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2568566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2569566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2570566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2571566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2572566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2573566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2574566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2575566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2576566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2577566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2578566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2579566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2580566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2581566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2582566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2583566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2584566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2585566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2586566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2587566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2588566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2589566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2590566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2591566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2592566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2593566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2594566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2595566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2596566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2597566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2598566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2599566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2600566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2601566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2602566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2603566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2604566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2605566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2606566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2607566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2608566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2609566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2610566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2611c609719bSwdenk 2612566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2613c609719bSwdenk 2614566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2615566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2616566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2617206c60cbSwdenk 2618566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2619566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 262011ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2621566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2622566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2623566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 262474de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 262574de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2626566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2627c609719bSwdenk 26281372cce2SMarian BalakowiczFIT uImage format: 26291372cce2SMarian Balakowicz 26301372cce2SMarian Balakowicz Arg Where When 26311372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 26321372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 26331372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 26341372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 26351372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 26361372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2637f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 26381372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 26391372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 26401372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 26411372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 26421372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 264311ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 264411ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 26451372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 26461372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 26471372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 26481372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 26491372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 26501372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 26511372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 26521372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 26531372cce2SMarian Balakowicz 26541372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 26551372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 26561372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 265711ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 26581372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 26591372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 26601372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 26611372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 26621372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 26631372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 26641372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 26651372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 26661372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 26671372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 26681372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 26691372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 26701372cce2SMarian Balakowicz 267111ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 26721372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 26731372cce2SMarian Balakowicz 267411ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 26751372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 26761372cce2SMarian Balakowicz 267711ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 26781372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 26791372cce2SMarian Balakowicz 2680d95f6ec7SGabe Black- FIT image support: 2681d95f6ec7SGabe Black CONFIG_FIT 2682d95f6ec7SGabe Black Enable support for the FIT uImage format. 2683d95f6ec7SGabe Black 2684d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 2685d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 2686d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 2687d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 2688d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 2689d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 2690d95f6ec7SGabe Black 26914cf2609bSWolfgang Denk- Standalone program support: 26924cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 26934cf2609bSWolfgang Denk 26946feff899SWolfgang Denk This option defines a board specific value for the 26956feff899SWolfgang Denk address where standalone program gets loaded, thus 26966feff899SWolfgang Denk overwriting the architecture dependent default 26974cf2609bSWolfgang Denk settings. 26984cf2609bSWolfgang Denk 26994cf2609bSWolfgang Denk- Frame Buffer Address: 27004cf2609bSWolfgang Denk CONFIG_FB_ADDR 27014cf2609bSWolfgang Denk 27024cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 27034cf2609bSWolfgang Denk address for frame buffer. 27044cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 27054cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 27066feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 27074cf2609bSWolfgang Denk 27084cf2609bSWolfgang Denk Please see board_init_f function. 27094cf2609bSWolfgang Denk 2710cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2711cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2712cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2713cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2714cccfc2abSDetlev Zundel 2715cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2716cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2717cccfc2abSDetlev Zundel 2718cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2719cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2720cccfc2abSDetlev Zundel 2721cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2722cccfc2abSDetlev Zundel Needed for mtdparts command support. 2723cccfc2abSDetlev Zundel 2724cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2725cccfc2abSDetlev Zundel 2726cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2727cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2728cccfc2abSDetlev Zundel 27296a11cf48SDaniel Schwierzeck- SPL framework 27306a11cf48SDaniel Schwierzeck CONFIG_SPL 27316a11cf48SDaniel Schwierzeck Enable building of SPL globally. 27326a11cf48SDaniel Schwierzeck 273395579793STom Rini CONFIG_SPL_LDSCRIPT 273495579793STom Rini LDSCRIPT for linking the SPL binary. 273595579793STom Rini 273695579793STom Rini CONFIG_SPL_MAX_SIZE 273795579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 273895579793STom Rini 27396a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 27406a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 27416a11cf48SDaniel Schwierzeck 274294a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 274394a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 274494a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 274594a45bb1SScott Wood 274695579793STom Rini CONFIG_SPL_BSS_START_ADDR 274795579793STom Rini Link address for the BSS within the SPL binary. 274895579793STom Rini 274995579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 275095579793STom Rini Maximum binary size of the BSS section of the SPL binary. 275195579793STom Rini 275295579793STom Rini CONFIG_SPL_STACK 275395579793STom Rini Adress of the start of the stack SPL will use 275495579793STom Rini 275594a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 275694a45bb1SScott Wood Adress of the start of the stack SPL will use after 275794a45bb1SScott Wood relocation. If unspecified, this is equal to 275894a45bb1SScott Wood CONFIG_SPL_STACK. 275994a45bb1SScott Wood 276095579793STom Rini CONFIG_SYS_SPL_MALLOC_START 276195579793STom Rini Starting address of the malloc pool used in SPL. 276295579793STom Rini 276395579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 276495579793STom Rini The size of the malloc pool used in SPL. 27656a11cf48SDaniel Schwierzeck 276647f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 276747f7bcaeSTom Rini Enable the SPL framework under common/. This framework 276847f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 276947f7bcaeSTom Rini NAND loading of the Linux Kernel. 277047f7bcaeSTom Rini 2771861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 2772861a86f4STom Rini For ARM, enable an optional function to print more information 2773861a86f4STom Rini about the running system. 2774861a86f4STom Rini 27754b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 27764b919725SScott Wood Arch init code should be built for a very small image 27774b919725SScott Wood 27786a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 27796a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 27806a11cf48SDaniel Schwierzeck 27816a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 27826a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 27836a11cf48SDaniel Schwierzeck 27846a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 27856a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 27866a11cf48SDaniel Schwierzeck 27876a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 27886a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 27896a11cf48SDaniel Schwierzeck 27906a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 27916a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 27926a11cf48SDaniel Schwierzeck 279395579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 279495579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 279595579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 279695579793STom Rini Address, size and partition on the MMC to load U-Boot from 279795579793STom Rini when the MMC is being used in raw mode. 279895579793STom Rini 279995579793STom Rini CONFIG_SPL_FAT_SUPPORT 280095579793STom Rini Support for fs/fat/libfat.o in SPL binary 280195579793STom Rini 280295579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 280395579793STom Rini Filename to read to load U-Boot when reading from FAT 280495579793STom Rini 28056f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 28066f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 28076f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 28086f2f01b9SScott Wood 28096f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 28106f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 28116f2f01b9SScott Wood 28126f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 28136f2f01b9SScott Wood Include standard software ECC in the SPL 28146f2f01b9SScott Wood 281595579793STom Rini CONFIG_SPL_NAND_SIMPLE 28167d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 28177d4b7955SScott Wood expose the cmd_ctrl() interface. 281895579793STom Rini 281995579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 282095579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 282195579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 282295579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 282395579793STom Rini CONFIG_SYS_NAND_ECCBYTES 282495579793STom Rini Defines the size and behavior of the NAND that SPL uses 28257d4b7955SScott Wood to read U-Boot 282695579793STom Rini 282795579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 28287d4b7955SScott Wood Location in NAND to read U-Boot from 28297d4b7955SScott Wood 28307d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 28317d4b7955SScott Wood Location in memory to load U-Boot to 28327d4b7955SScott Wood 28337d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 28347d4b7955SScott Wood Size of image to load 283595579793STom Rini 283695579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 28377d4b7955SScott Wood Entry point in loaded image to jump to 283895579793STom Rini 283995579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 284095579793STom Rini Define this if you need to first read the OOB and then the 284195579793STom Rini data. This is used for example on davinci plattforms. 284295579793STom Rini 284395579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 284495579793STom Rini Support for an OMAP3-specific set of functions to return the 284595579793STom Rini ID and MFR of the first attached NAND chip, if present. 284695579793STom Rini 28476a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 28486a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 28496a11cf48SDaniel Schwierzeck 28506a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 28516a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 28526a11cf48SDaniel Schwierzeck 28536a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 28546a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 28556a11cf48SDaniel Schwierzeck 2856c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 2857c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 2858c57b953dSPavel Machek 28596a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 28606a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 28611372cce2SMarian Balakowicz 2862ca2fca22SScott Wood CONFIG_SPL_TARGET 2863ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 2864ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 2865ca2fca22SScott Wood example if more than one image needs to be produced. 2866ca2fca22SScott Wood 2867c609719bSwdenkModem Support: 2868c609719bSwdenk-------------- 2869c609719bSwdenk 2870566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2871c609719bSwdenk 287211ccc33fSMarcel Ziswiler- Modem support enable: 2873c609719bSwdenk CONFIG_MODEM_SUPPORT 2874c609719bSwdenk 2875c609719bSwdenk- RTS/CTS Flow control enable: 2876c609719bSwdenk CONFIG_HWFLOW 2877c609719bSwdenk 2878c609719bSwdenk- Modem debug support: 2879c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2880c609719bSwdenk 2881c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2882c609719bSwdenk for modem support. Useful only with BDI2000. 2883c609719bSwdenk 2884a8c7c708Swdenk- Interrupt support (PPC): 2885a8c7c708Swdenk 2886a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2887a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 288811ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2889a8c7c708Swdenk should set decrementer_count to appropriate value. If 289011ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2891a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 289211ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2893a8c7c708Swdenk specific handling. If board has watchdog / status_led 2894a8c7c708Swdenk / other_activity_monitor it works automatically from 2895a8c7c708Swdenk general timer_interrupt(). 2896a8c7c708Swdenk 2897c609719bSwdenk- General: 2898c609719bSwdenk 2899c609719bSwdenk In the target system modem support is enabled when a 2900c609719bSwdenk specific key (key combination) is pressed during 2901c609719bSwdenk power-on. Otherwise U-Boot will boot normally 290211ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2903c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2904c609719bSwdenk function, returning 1 and thus enabling modem 2905c609719bSwdenk initialization. 2906c609719bSwdenk 2907c609719bSwdenk If there are no modem init strings in the 2908c609719bSwdenk environment, U-Boot proceed to autoboot; the 2909c609719bSwdenk previous output (banner, info printfs) will be 291011ccc33fSMarcel Ziswiler suppressed, though. 2911c609719bSwdenk 2912c609719bSwdenk See also: doc/README.Modem 2913c609719bSwdenk 29149660e442SHelmut RaigerBoard initialization settings: 29159660e442SHelmut Raiger------------------------------ 29169660e442SHelmut Raiger 29179660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 29189660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 29199660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 29209660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 29219660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 29229660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 29239660e442SHelmut Raiger 29249660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 29259660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 29269660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 29279660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2928c609719bSwdenk 2929c609719bSwdenkConfiguration Settings: 2930c609719bSwdenk----------------------- 2931c609719bSwdenk 29326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2933c609719bSwdenk undefine this when you're short of memory. 2934c609719bSwdenk 29352fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 29362fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 29372fb2604dSPeter Tyser 29386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2939c609719bSwdenk prompt for user input. 2940c609719bSwdenk 29416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2942c609719bSwdenk 29436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2944c609719bSwdenk 29456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2946c609719bSwdenk 29476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2948c609719bSwdenk the application (usually a Linux kernel) when it is 2949c609719bSwdenk booted 2950c609719bSwdenk 29516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2952c609719bSwdenk List of legal baudrate settings for this board. 2953c609719bSwdenk 29546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2955c609719bSwdenk Suppress display of console information at boot. 2956c609719bSwdenk 29576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2958c609719bSwdenk If the board specific function 2959c609719bSwdenk extern int overwrite_console (void); 2960c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2961c609719bSwdenk serial port, else the settings in the environment are used. 2962c609719bSwdenk 29636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2964c609719bSwdenk Enable the call to overwrite_console(). 2965c609719bSwdenk 29666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2967c609719bSwdenk Enable overwrite of previous console environment settings. 2968c609719bSwdenk 29696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2970c609719bSwdenk Begin and End addresses of the area used by the 2971c609719bSwdenk simple memory test. 2972c609719bSwdenk 29736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2974c609719bSwdenk Enable an alternate, more extensive memory test. 2975c609719bSwdenk 29766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 29775f535fe1Swdenk Scratch address used by the alternate memory test 29785f535fe1Swdenk You only need to set this if address zero isn't writeable 29795f535fe1Swdenk 29806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 29816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 298214f73ca6SStefan Roese this specified memory area will get subtracted from the top 298311ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 298414f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 298514f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 298614f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 29875e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 298814f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 29895e12e75dSStefan Roese will have to get fixed in Linux additionally. 299014f73ca6SStefan Roese 299114f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 299214f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 299314f73ca6SStefan Roese be touched. 299414f73ca6SStefan Roese 299514f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 299614f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 299714f73ca6SStefan Roese then the end address of the Linux memory will be located at a 299814f73ca6SStefan Roese non page size aligned address and this could cause major 299914f73ca6SStefan Roese problems. 300014f73ca6SStefan Roese 30016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3002c609719bSwdenk Enable temporary baudrate change while serial download 3003c609719bSwdenk 30046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3005c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3006c609719bSwdenk 30076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3008c609719bSwdenk Physical start address of Motherboard I/O (if using a 3009c609719bSwdenk Cogent motherboard) 3010c609719bSwdenk 30116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3012c609719bSwdenk Physical start address of Flash memory. 3013c609719bSwdenk 30146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3015c609719bSwdenk Physical start address of boot monitor code (set by 3016c609719bSwdenk make config files to be same as the text base address 301714d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 30186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3019c609719bSwdenk 30206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 30213b57fe0aSwdenk Size of memory reserved for monitor code, used to 30223b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 30233b57fe0aSwdenk embedded within the U-Boot image, or in a separate 30243b57fe0aSwdenk flash sector. 3025c609719bSwdenk 30266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3027c609719bSwdenk Size of DRAM reserved for malloc() use. 3028c609719bSwdenk 30296d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 303015940c9aSStefan Roese Normally compressed uImages are limited to an 303115940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 30326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 303315940c9aSStefan Roese to adjust this setting to your needs. 3034c609719bSwdenk 30356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3036c609719bSwdenk Maximum size of memory mapped by the startup code of 3037c609719bSwdenk the Linux kernel; all data that must be processed by 30387d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 30397d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 30407d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 30417d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3042c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3043c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3044c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3045c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3046c609719bSwdenk 3047fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3048fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3049fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3050fca43cc8SJohn Rigby is enabled. 3051fca43cc8SJohn Rigby 3052fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3053fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3054fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3055fca43cc8SJohn Rigby 3056fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3057fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3058fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3059fca43cc8SJohn Rigby 30606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3061c609719bSwdenk Max number of Flash memory banks 3062c609719bSwdenk 30636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3064c609719bSwdenk Max number of sectors on a Flash chip 3065c609719bSwdenk 30666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3067c609719bSwdenk Timeout for Flash erase operations (in ms) 3068c609719bSwdenk 30696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3070c609719bSwdenk Timeout for Flash write operations (in ms) 3071c609719bSwdenk 30726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 30738564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 30748564acf9Swdenk 30756d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 30768564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 30778564acf9Swdenk 30786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 30798564acf9Swdenk If defined, hardware flash sectors protection is used 30808564acf9Swdenk instead of U-Boot software protection. 30818564acf9Swdenk 30826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3083c609719bSwdenk 3084c609719bSwdenk Enable TFTP transfers directly to flash memory; 3085c609719bSwdenk without this option such a download has to be 3086c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3087c609719bSwdenk copy from RAM to flash. 3088c609719bSwdenk 3089c609719bSwdenk The two-step approach is usually more reliable, since 3090c609719bSwdenk you can check if the download worked before you erase 309111ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 309211ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3093c609719bSwdenk downloaded image) this option may be very useful. 3094c609719bSwdenk 30956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3096c609719bSwdenk Define if the flash driver uses extra elements in the 30975653fc33Swdenk common flash structure for storing flash geometry. 30985653fc33Swdenk 309900b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 31005653fc33Swdenk This option also enables the building of the cfi_flash driver 31015653fc33Swdenk in the drivers directory 310253cf9435Sstroese 310391809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 310491809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 310591809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 310691809ed5SPiotr Ziecik to the MTD layer. 310791809ed5SPiotr Ziecik 31086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 310996ef831fSGuennadi Liakhovetski Use buffered writes to flash. 311096ef831fSGuennadi Liakhovetski 311196ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 311296ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 311396ef831fSGuennadi Liakhovetski write commands. 311496ef831fSGuennadi Liakhovetski 31156d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 31165568e613SStefan Roese If this option is defined, the common CFI flash doesn't 31175568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 31185568e613SStefan Roese is useful, if some of the configured banks are only 31195568e613SStefan Roese optionally available. 31205568e613SStefan Roese 31219a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 31229a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 31239a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 31249a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 31259a042e9cSJerry Van Baren 31266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 312711ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 312811ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 312953cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 313053cf9435Sstroese buffers can be full shortly after enabling the interface 313111ccc33fSMarcel Ziswiler on high Ethernet traffic. 313253cf9435Sstroese Defaults to 4 if not defined. 3133c609719bSwdenk 3134ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3135ea882bafSWolfgang Denk 3136ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3137ea882bafSWolfgang Denk internally to store the environment settings. The default 3138ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3139ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3140ea882bafSWolfgang Denk lib/hashtable.c for details. 3141ea882bafSWolfgang Denk 31422598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 31432598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 31442598090bSJoe Hershberger Enable validation of the values given to enviroment variables when 31452598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 31462598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 31472598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 31482598090bSJoe Hershberger 31492598090bSJoe Hershberger The format of the list is: 31502598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3151267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3152267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 31532598090bSJoe Hershberger entry = variable_name[:attributes] 31542598090bSJoe Hershberger list = entry[,list] 31552598090bSJoe Hershberger 31562598090bSJoe Hershberger The type attributes are: 31572598090bSJoe Hershberger s - String (default) 31582598090bSJoe Hershberger d - Decimal 31592598090bSJoe Hershberger x - Hexadecimal 31602598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 31612598090bSJoe Hershberger i - IP address 31622598090bSJoe Hershberger m - MAC address 31632598090bSJoe Hershberger 3164267541f7SJoe Hershberger The access attributes are: 3165267541f7SJoe Hershberger a - Any (default) 3166267541f7SJoe Hershberger r - Read-only 3167267541f7SJoe Hershberger o - Write-once 3168267541f7SJoe Hershberger c - Change-default 3169267541f7SJoe Hershberger 31702598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 31712598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 31722598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 31732598090bSJoe Hershberger 31742598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 31752598090bSJoe Hershberger Define this to a list (string) to define validation that 31762598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 31772598090bSJoe Hershberger environment variable. To override a setting in the static 31782598090bSJoe Hershberger list, simply add an entry for the same variable name to the 31792598090bSJoe Hershberger ".flags" variable. 31802598090bSJoe Hershberger 3181267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3182267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3183267541f7SJoe Hershberger access flags. 3184267541f7SJoe Hershberger 3185c609719bSwdenkThe following definitions that deal with the placement and management 3186c609719bSwdenkof environment data (variable area); in general, we support the 3187c609719bSwdenkfollowing configurations: 3188c609719bSwdenk 3189c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3190c3eb3fe4SMike Frysinger 3191c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3192c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3193c3eb3fe4SMike Frysinger 31945a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3195c609719bSwdenk 3196c609719bSwdenk Define this if the environment is in flash memory. 3197c609719bSwdenk 3198c609719bSwdenk a) The environment occupies one whole flash sector, which is 3199c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3200c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3201c609719bSwdenk sector" type flash chips, which have several smaller 3202c609719bSwdenk sectors at the start or the end. For instance, such a 3203c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3204c609719bSwdenk such a case you would place the environment in one of the 3205c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3206c609719bSwdenk "top boot sector" type flash chips, you would put the 3207c609719bSwdenk environment in one of the last sectors, leaving a gap 3208c609719bSwdenk between U-Boot and the environment. 3209c609719bSwdenk 32100e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3211c609719bSwdenk 3212c609719bSwdenk Offset of environment data (variable area) to the 3213c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3214c609719bSwdenk type flash chips the second sector can be used: the offset 3215c609719bSwdenk for this sector is given here. 3216c609719bSwdenk 32176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3218c609719bSwdenk 32190e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3220c609719bSwdenk 3221c609719bSwdenk This is just another way to specify the start address of 3222c609719bSwdenk the flash sector containing the environment (instead of 32230e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3224c609719bSwdenk 32250e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3226c609719bSwdenk 3227c609719bSwdenk Size of the sector containing the environment. 3228c609719bSwdenk 3229c609719bSwdenk 3230c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3231c609719bSwdenk In such a case you don't want to spend a whole sector for 3232c609719bSwdenk the environment. 3233c609719bSwdenk 32340e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3235c609719bSwdenk 32365a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 32370e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3238c609719bSwdenk of this flash sector for the environment. This saves 3239c609719bSwdenk memory for the RAM copy of the environment. 3240c609719bSwdenk 3241c609719bSwdenk It may also save flash memory if you decide to use this 3242c609719bSwdenk when your environment is "embedded" within U-Boot code, 3243c609719bSwdenk since then the remainder of the flash sector could be used 3244c609719bSwdenk for U-Boot code. It should be pointed out that this is 3245c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3246c609719bSwdenk updating the environment in flash makes it always 3247c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3248c609719bSwdenk wrong before the contents has been restored from a copy in 3249c609719bSwdenk RAM, your target system will be dead. 3250c609719bSwdenk 32510e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 32520e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3253c609719bSwdenk 3254c609719bSwdenk These settings describe a second storage area used to hold 325511ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 32563e38691eSwdenk a valid backup copy in case there is a power failure during 3257c609719bSwdenk a "saveenv" operation. 3258c609719bSwdenk 3259c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3260c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3261c609719bSwdenkaccordingly! 3262c609719bSwdenk 3263c609719bSwdenk 32649314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3265c609719bSwdenk 3266c609719bSwdenk Define this if you have some non-volatile memory device 3267c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3268c609719bSwdenk environment. 3269c609719bSwdenk 32700e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 32710e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3272c609719bSwdenk 327311ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3274c609719bSwdenk want to use for environment. It is assumed that this memory 3275c609719bSwdenk can just be read and written to, without any special 3276c609719bSwdenk provision. 3277c609719bSwdenk 3278c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3279c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 328011ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3281c609719bSwdenkU-Boot will hang. 3282c609719bSwdenk 3283c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3284c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3285c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3286c609719bSwdenkto save the current settings. 3287c609719bSwdenk 3288c609719bSwdenk 3289bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3290c609719bSwdenk 3291c609719bSwdenk Use this if you have an EEPROM or similar serial access 3292c609719bSwdenk device and a driver for it. 3293c609719bSwdenk 32940e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 32950e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3296c609719bSwdenk 3297c609719bSwdenk These two #defines specify the offset and size of the 3298c609719bSwdenk environment area within the total memory of your EEPROM. 3299c609719bSwdenk 33006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3301c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3302c609719bSwdenk The default address is zero. 3303c609719bSwdenk 33046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3305c609719bSwdenk If defined, the number of bits used to address bytes in a 3306c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3307c609719bSwdenk would require six bits. 3308c609719bSwdenk 33096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3310c609719bSwdenk If defined, the number of milliseconds to delay between 3311c609719bSwdenk page writes. The default is zero milliseconds. 3312c609719bSwdenk 33136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3314c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3315c609719bSwdenk that this is NOT the chip address length! 3316c609719bSwdenk 33176d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 33185cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 33195cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 33205cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 33215cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 33225cf91d6bSwdenk byte chips. 33235cf91d6bSwdenk 33245cf91d6bSwdenk Note that we consider the length of the address field to 33255cf91d6bSwdenk still be one byte because the extra address bits are hidden 33265cf91d6bSwdenk in the chip address. 33275cf91d6bSwdenk 33286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3329c609719bSwdenk The size in bytes of the EEPROM device. 3330c609719bSwdenk 3331548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3332548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3333548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3334548738b4SHeiko Schocher 3335548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3336548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3337548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3338548738b4SHeiko Schocher EEPROM. For example: 3339548738b4SHeiko Schocher 3340548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3341548738b4SHeiko Schocher 3342548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3343548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3344c609719bSwdenk 3345057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 33465779d8d9Swdenk 33475779d8d9Swdenk Define this if you have a DataFlash memory device which you 33485779d8d9Swdenk want to use for the environment. 33495779d8d9Swdenk 33500e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 33510e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 33520e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 33535779d8d9Swdenk 33545779d8d9Swdenk These three #defines specify the offset and size of the 33555779d8d9Swdenk environment area within the total memory of your DataFlash placed 33565779d8d9Swdenk at the specified address. 33575779d8d9Swdenk 33580a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 33590a85a9e7SLiu Gang 33600a85a9e7SLiu Gang Define this if you have a remote memory space which you 33610a85a9e7SLiu Gang want to use for the local device's environment. 33620a85a9e7SLiu Gang 33630a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 33640a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 33650a85a9e7SLiu Gang 33660a85a9e7SLiu Gang These two #defines specify the address and size of the 33670a85a9e7SLiu Gang environment area within the remote memory space. The 33680a85a9e7SLiu Gang local device can get the environment from remote memory 3369fc54c7faSLiu Gang space by SRIO or PCIE links. 33700a85a9e7SLiu Gang 33710a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 33720a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3373fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3374fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 33750a85a9e7SLiu Gang 337651bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 337713a5695bSwdenk 337813a5695bSwdenk Define this if you have a NAND device which you want to use 337913a5695bSwdenk for the environment. 338013a5695bSwdenk 33810e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 33820e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 338313a5695bSwdenk 338413a5695bSwdenk These two #defines specify the offset and size of the environment 3385fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3386fdd813deSScott Wood aligned to an erase block boundary. 33875779d8d9Swdenk 3388fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3389e443c944SMarkus Klotzbuecher 33900e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3391fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3392fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3393fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3394fdd813deSScott Wood aligned to an erase block boundary. 3395e443c944SMarkus Klotzbuecher 3396fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3397fdd813deSScott Wood 3398fdd813deSScott Wood Specifies the length of the region in which the environment 3399fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3400fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3401fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3402fdd813deSScott Wood the range to be avoided. 3403fdd813deSScott Wood 3404fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3405fdd813deSScott Wood 3406fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3407fdd813deSScott Wood environment from block zero's out-of-band data. The 3408fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3409fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3410fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3411e443c944SMarkus Klotzbuecher 3412b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3413b74ab737SGuennadi Liakhovetski 3414b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3415b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3416b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3417b74ab737SGuennadi Liakhovetski 34186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3419c609719bSwdenk 3420c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3421c609719bSwdenk area is used at an early stage (ROM part) if the environment 3422c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3423c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3424c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3425c609719bSwdenk to be a good choice since it makes it far enough from the 3426c609719bSwdenk start of the data area as well as from the stack pointer. 3427c609719bSwdenk 3428e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3429c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3430cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3431c609719bSwdenkuntil then to read environment variables. 3432c609719bSwdenk 343385ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 343485ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 343585ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 343685ec0bccSwdenknecessary, because the first environment variable we need is the 343785ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 343885ec0bccSwdenkhave any device yet where we could complain.] 3439c609719bSwdenk 3440c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3441c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 344285ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3443c609719bSwdenk 34446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3445fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3446fc3e2165Swdenk 34476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3448fc3e2165Swdenk also needs to be defined. 3449fc3e2165Swdenk 34506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3451fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3452c609719bSwdenk 3453f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3454f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3455f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3456f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3457f5675aa5SRon Madrid space for already greatly restricted images, including but not 3458f5675aa5SRon Madrid limited to NAND_SPL configurations. 3459f5675aa5SRon Madrid 3460b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 3461b2b92f53SSimon Glass Display information about the board that U-Boot is running on 3462b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 3463b2b92f53SSimon Glass to do this. 3464b2b92f53SSimon Glass 3465*e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 3466*e2e3e2b1SSimon Glass Similar to the previous option, but display this information 3467*e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 3468*e2e3e2b1SSimon Glass present. 3469*e2e3e2b1SSimon Glass 3470c609719bSwdenkLow Level (hardware related) configuration options: 3471dc7c9a1aSwdenk--------------------------------------------------- 3472c609719bSwdenk 34736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3474c609719bSwdenk Cache Line Size of the CPU. 3475c609719bSwdenk 34766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3477c609719bSwdenk Default address of the IMMR after system reset. 34782535d602Swdenk 34792535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 34802535d602Swdenk and RPXsuper) to be able to adjust the position of 34812535d602Swdenk the IMMR register after a reset. 3482c609719bSwdenk 3483e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3484e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3485e46fedfeSTimur Tabi PowerPC SOCs. 3486e46fedfeSTimur Tabi 3487e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3488e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3489e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3490e46fedfeSTimur Tabi 3491e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3492e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3493e46fedfeSTimur Tabi 3494e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3495e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3496e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3497e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3498e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3499e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3500e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3501e46fedfeSTimur Tabi 3502e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3503e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3504e46fedfeSTimur Tabi 3505e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3506e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3507e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3508e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3509e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3510e46fedfeSTimur Tabi 3511e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3512e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3513e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3514e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3515e46fedfeSTimur Tabi 3516e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3517e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3518e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3519e46fedfeSTimur Tabi 35207f6c2cbcSwdenk- Floppy Disk Support: 35216d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 35227f6c2cbcSwdenk 35237f6c2cbcSwdenk the default drive number (default value 0) 35247f6c2cbcSwdenk 35256d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 35267f6c2cbcSwdenk 352711ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 35287f6c2cbcSwdenk (default value 1) 35297f6c2cbcSwdenk 35306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 35317f6c2cbcSwdenk 35327f6c2cbcSwdenk defines the offset of register from address. It 35337f6c2cbcSwdenk depends on which part of the data bus is connected to 353411ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 35357f6c2cbcSwdenk 35366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 35376d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 35387f6c2cbcSwdenk default value. 35397f6c2cbcSwdenk 35406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 35417f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 35427f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 35437f6c2cbcSwdenk source code. It is used to make hardware dependant 35447f6c2cbcSwdenk initializations. 35457f6c2cbcSwdenk 35460abddf82SMacpaul Lin- CONFIG_IDE_AHB: 35470abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 35480abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 35490abddf82SMacpaul Lin When software is doing ATA command and data transfer to 35500abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 35510abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 35520abddf82SMacpaul Lin is requierd. 35530abddf82SMacpaul Lin 35546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 355525d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 355625d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3557c609719bSwdenk 35586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3559c609719bSwdenk 35607152b1d0Swdenk Start address of memory area that can be used for 3561c609719bSwdenk initial data and stack; please note that this must be 3562c609719bSwdenk writable memory that is working WITHOUT special 3563c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3564c609719bSwdenk will become available only after programming the 3565c609719bSwdenk memory controller and running certain initialization 3566c609719bSwdenk sequences. 3567c609719bSwdenk 3568c609719bSwdenk U-Boot uses the following memory types: 3569c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3570c609719bSwdenk - MPC824X: data cache 3571c609719bSwdenk - PPC4xx: data cache 3572c609719bSwdenk 35736d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3574c609719bSwdenk 3575c609719bSwdenk Offset of the initial data structure in the memory 35766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 35776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3578c609719bSwdenk data is located at the end of the available space 3579553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 35806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 35816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 35826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3583c609719bSwdenk 3584c609719bSwdenk Note: 3585c609719bSwdenk On the MPC824X (or other systems that use the data 3586c609719bSwdenk cache for initial memory) the address chosen for 35876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3588c609719bSwdenk point to an otherwise UNUSED address space between 3589c609719bSwdenk the top of RAM and the start of the PCI space. 3590c609719bSwdenk 35916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3592c609719bSwdenk 35936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3594c609719bSwdenk 35956d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3596c609719bSwdenk 35976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3598c609719bSwdenk 35996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3600c609719bSwdenk 36016d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3602c609719bSwdenk 36036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3604c609719bSwdenk SDRAM timing 3605c609719bSwdenk 36066d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3607c609719bSwdenk periodic timer for refresh 3608c609719bSwdenk 36096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3610c609719bSwdenk 36116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 36126d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 36136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 36146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3615c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3616c609719bSwdenk 3617c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 36186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 36196d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3620c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3621c609719bSwdenk 36226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 36236d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3624c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3625c609719bSwdenk Prescaler definitions (SDRAM timing) 3626c609719bSwdenk 36276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3628c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3629c609719bSwdenk define relocation offset in DPRAM [DSP2] 3630c609719bSwdenk 36316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3632b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3633b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3634b423d055SHeiko Schocher 36356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3636c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3637c609719bSwdenk define relocation offset in DPRAM [SCC4] 3638c609719bSwdenk 36396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3640c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3641c609719bSwdenk wrong setting might damage your board. Read 3642c609719bSwdenk doc/README.MBX before setting this variable! 3643c609719bSwdenk 36446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3645ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3646ea909b76Swdenk (Power On Self Tests). This definition overrides 3647ea909b76Swdenk #define'd default value in commproc.h resp. 3648ea909b76Swdenk cpm_8260.h. 3649ea909b76Swdenk 36506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 36516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 36526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 36536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 36546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 36556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 36566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 36576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3658a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 36595d232d0eSwdenk 36609cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 36619cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 36629cacf4fcSDirk Eibach required. 36639cacf4fcSDirk Eibach 366469fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 366569fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 366669fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 366769fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 366869fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 366969fd2d3bSAndrew Sharp by coreboot or similar. 367069fd2d3bSAndrew Sharp 3671a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3672a09b9b68SKumar Gala Chip has SRIO or not 3673a09b9b68SKumar Gala 3674a09b9b68SKumar Gala- CONFIG_SRIO1: 3675a09b9b68SKumar Gala Board has SRIO 1 port available 3676a09b9b68SKumar Gala 3677a09b9b68SKumar Gala- CONFIG_SRIO2: 3678a09b9b68SKumar Gala Board has SRIO 2 port available 3679a09b9b68SKumar Gala 3680a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3681a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3682a09b9b68SKumar Gala 3683a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3684a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3685a09b9b68SKumar Gala 3686a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3687a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3688a09b9b68SKumar Gala 3689eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3690eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3691eced4626SAlex Waterman 16 bit bus. 3692eced4626SAlex Waterman 3693eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3694eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3695eced4626SAlex Waterman a default value will be used. 3696eced4626SAlex Waterman 3697bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3698218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3699218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3700218ca724SWolfgang Denk 3701bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3702bb99ad6dSBen Warren I2C address of the SPD EEPROM 3703bb99ad6dSBen Warren 37046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3705218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3706218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3707218ca724SWolfgang Denk to something your driver can deal with. 3708bb99ad6dSBen Warren 37091b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 37101b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 37111b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 37121b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 37131b3e3c4fSYork Sun header files or board specific files. 37141b3e3c4fSYork Sun 37156f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 37166f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 37176f5e1dc5SYork Sun 37186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3719218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3720218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 37212ad6b513STimur Tabi 3722c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3723c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3724c26e454dSwdenk 3725c26e454dSwdenk- CONFIG_FEC[12]_PHY 3726c26e454dSwdenk Define to the hardcoded PHY address which corresponds 37276e592385Swdenk to the given FEC; i. e. 3728c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3729c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3730c26e454dSwdenk 3731c26e454dSwdenk When set to -1, means to probe for first available. 3732c26e454dSwdenk 3733c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3734c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3735c26e454dSwdenk (so program the FEC to ignore it). 3736c26e454dSwdenk 3737c26e454dSwdenk- CONFIG_RMII 3738c26e454dSwdenk Enable RMII mode for all FECs. 3739c26e454dSwdenk Note that this is a global option, we can't 3740c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3741c26e454dSwdenk 37425cf91d6bSwdenk- CONFIG_CRC32_VERIFY 37435cf91d6bSwdenk Add a verify option to the crc32 command. 37445cf91d6bSwdenk The syntax is: 37455cf91d6bSwdenk 37465cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 37475cf91d6bSwdenk 37485cf91d6bSwdenk Where address/count indicate a memory area 37495cf91d6bSwdenk and crc32 is the correct crc32 which the 37505cf91d6bSwdenk area should have. 37515cf91d6bSwdenk 375256523f12Swdenk- CONFIG_LOOPW 375356523f12Swdenk Add the "loopw" memory command. This only takes effect if 3754602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 375556523f12Swdenk 37567b466641Sstroese- CONFIG_MX_CYCLIC 37577b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 37587b466641Sstroese "md/mw" commands. 37597b466641Sstroese Examples: 37607b466641Sstroese 37617b466641Sstroese => mdc.b 10 4 500 37627b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 37637b466641Sstroese 37647b466641Sstroese => mwc.l 100 12345678 10 37657b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 37667b466641Sstroese 37677b466641Sstroese This only takes effect if the memory commands are activated 3768602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 37697b466641Sstroese 37708aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3771afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3772e03f3169SWolfgang Denk low level initializations (like setting up the memory 3773e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3774e03f3169SWolfgang Denk relocate itself into RAM. 37758aa1a2d1Swdenk 3776e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3777e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3778e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3779e03f3169SWolfgang Denk these initializations itself. 37808aa1a2d1Swdenk 3781401bb30bSAneesh V- CONFIG_SPL_BUILD 3782df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3783df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3784df81238bSMagnus Lilja compiling a NAND SPL. 3785400558b5Swdenk 3786d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3787d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3788d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3789d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3790d8834a13SMatthias Weisser conditions but may increase the binary size. 3791d8834a13SMatthias Weisser 3792b16f521aSGabe Black- CONFIG_X86_NO_RESET_VECTOR 3793b16f521aSGabe Black If defined, the x86 reset vector code is excluded. You will need 3794b16f521aSGabe Black to do this when U-Boot is running from Coreboot. 3795b16f521aSGabe Black 37965b5ece9eSGabe Black- CONFIG_X86_NO_REAL_MODE 37975b5ece9eSGabe Black If defined, x86 real mode code is omitted. This assumes a 37985b5ece9eSGabe Black 32-bit environment where such code is not needed. You will 37995b5ece9eSGabe Black need to do this when U-Boot is running from Coreboot. 38005b5ece9eSGabe Black 38015b5ece9eSGabe Black 3802f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3803f2717b47STimur Tabi----------------------------------- 3804f2717b47STimur Tabi 3805f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3806f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3807f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3808f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3809f2717b47STimur Tabiwithin that device. 3810f2717b47STimur Tabi 3811f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3812f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3813f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3814f2717b47STimur Tabi is also specified. 3815f2717b47STimur Tabi 3816f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3817f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3818f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3819f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3820f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3821f2717b47STimur Tabi 3822f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3823f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3824f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3825f2717b47STimur Tabi virtual address in NOR flash. 3826f2717b47STimur Tabi 3827f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3828f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3829f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3830f2717b47STimur Tabi 3831f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3832f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3833f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3834f2717b47STimur Tabi 3835f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3836f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3837f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3838f2717b47STimur Tabi 3839292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3840292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3841292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3842fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3843fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3844fc54c7faSLiu Gang master's memory space. 3845f2717b47STimur Tabi 3846c609719bSwdenkBuilding the Software: 3847c609719bSwdenk====================== 3848c609719bSwdenk 3849218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3850218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3851218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3852218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3853218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3854218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3855c609719bSwdenk 3856218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3857218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3858218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3859218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3860218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3861c609719bSwdenk 3862218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3863218ca724SWolfgang Denk $ export CROSS_COMPILE 3864c609719bSwdenk 38652f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 38662f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 38672f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 38682f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 38692f8d396bSPeter Tyser 38702f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 38712f8d396bSPeter Tyser 38722f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 38732f8d396bSPeter Tyser be executed on computers running Windows. 38742f8d396bSPeter Tyser 3875c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3876c609719bSwdenksources you must configure U-Boot for one specific board type. This 3877c609719bSwdenkis done by typing: 3878c609719bSwdenk 3879c609719bSwdenk make NAME_config 3880c609719bSwdenk 3881218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 38824d675ae6SMichael Jonesrations; see boards.cfg for supported names. 388354387ac9Swdenk 3884c609719bSwdenkNote: for some board special configuration names may exist; check if 3885c609719bSwdenk additional information is available from the board vendor; for 38862729af9dSwdenk instance, the TQM823L systems are available without (standard) 38872729af9dSwdenk or with LCD support. You can select such additional "features" 388811ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3889c609719bSwdenk 38902729af9dSwdenk make TQM823L_config 38912729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3892c609719bSwdenk 3893c609719bSwdenk make TQM823L_LCD_config 3894c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3895c609719bSwdenk 3896c609719bSwdenk etc. 3897c609719bSwdenk 3898c609719bSwdenk 3899c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 39007152b1d0Swdenkimages ready for download to / installation on your system: 3901c609719bSwdenk 3902c609719bSwdenk- "u-boot.bin" is a raw binary image 3903c609719bSwdenk- "u-boot" is an image in ELF binary format 3904c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3905c609719bSwdenk 3906baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3907baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3908baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3909baf31249SMarian Balakowicz 3910baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3911baf31249SMarian Balakowicz 3912baf31249SMarian Balakowicz make O=/tmp/build distclean 3913baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3914baf31249SMarian Balakowicz make O=/tmp/build all 3915baf31249SMarian Balakowicz 3916baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3917baf31249SMarian Balakowicz 3918baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3919baf31249SMarian Balakowicz make distclean 3920baf31249SMarian Balakowicz make NAME_config 3921baf31249SMarian Balakowicz make all 3922baf31249SMarian Balakowicz 3923baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3924baf31249SMarian Balakowiczvariable. 3925baf31249SMarian Balakowicz 3926c609719bSwdenk 3927c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3928c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3929c609719bSwdenknative "make". 3930c609719bSwdenk 3931c609719bSwdenk 3932c609719bSwdenkIf the system board that you have is not listed, then you will need 3933c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3934c609719bSwdenksteps: 3935c609719bSwdenk 3936c609719bSwdenk1. Add a new configuration option for your board to the toplevel 39374d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 39384d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3939c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 394085ec0bccSwdenk files you need. In your board directory, you will need at least 394185ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 394285ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 394385ec0bccSwdenk your board 3944c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3945c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 394685ec0bccSwdenk4. Run "make <board>_config" with your new name. 3947c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3948c609719bSwdenk to be installed on your target system. 394985ec0bccSwdenk6. Debug and solve any problems that might arise. 3950c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3951c609719bSwdenk 3952c609719bSwdenk 3953c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3954c609719bSwdenk============================================================== 3955c609719bSwdenk 3956c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3957c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3958c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3959c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3960218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3961c609719bSwdenk 3962c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3963c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3964c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3965c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3966c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 39677152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3968218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3969218ca724SWolfgang Denkyou can type 3970c609719bSwdenk 3971c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3972c609719bSwdenk 3973c609719bSwdenkor to build on a native PowerPC system you can type 3974c609719bSwdenk 3975c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3976c609719bSwdenk 3977218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3978218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3979218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3980218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3981218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3982218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3983218ca724SWolfgang Denkvariable. For example: 3984baf31249SMarian Balakowicz 3985baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3986baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3987baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3988baf31249SMarian Balakowicz 3989218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3990218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3991218ca724SWolfgang Denkduring the whole build process. 3992baf31249SMarian Balakowicz 3993baf31249SMarian Balakowicz 3994c609719bSwdenkSee also "U-Boot Porting Guide" below. 3995c609719bSwdenk 3996c609719bSwdenk 3997c609719bSwdenkMonitor Commands - Overview: 3998c609719bSwdenk============================ 3999c609719bSwdenk 4000c609719bSwdenkgo - start application at address 'addr' 4001c609719bSwdenkrun - run commands in an environment variable 4002c609719bSwdenkbootm - boot application image from memory 4003c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 400444f074c7SMarek Vasutbootz - boot zImage from memory 4005c609719bSwdenktftpboot- boot image via network using TFTP protocol 4006c609719bSwdenk and env variables "ipaddr" and "serverip" 4007c609719bSwdenk (and eventually "gatewayip") 40081fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4009c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4010c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4011c609719bSwdenkloads - load S-Record file over serial line 4012c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4013c609719bSwdenkmd - memory display 4014c609719bSwdenkmm - memory modify (auto-incrementing) 4015c609719bSwdenknm - memory modify (constant address) 4016c609719bSwdenkmw - memory write (fill) 4017c609719bSwdenkcp - memory copy 4018c609719bSwdenkcmp - memory compare 4019c609719bSwdenkcrc32 - checksum calculation 40200f89c54bSPeter Tyseri2c - I2C sub-system 4021c609719bSwdenksspi - SPI utility commands 4022c609719bSwdenkbase - print or set address offset 4023c609719bSwdenkprintenv- print environment variables 4024c609719bSwdenksetenv - set environment variables 4025c609719bSwdenksaveenv - save environment variables to persistent storage 4026c609719bSwdenkprotect - enable or disable FLASH write protection 4027c609719bSwdenkerase - erase FLASH memory 4028c609719bSwdenkflinfo - print FLASH memory information 402910635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4030c609719bSwdenkbdinfo - print Board Info structure 4031c609719bSwdenkiminfo - print header information for application image 4032c609719bSwdenkconinfo - print console devices and informations 4033c609719bSwdenkide - IDE sub-system 4034c609719bSwdenkloop - infinite loop on address range 403556523f12Swdenkloopw - infinite write loop on address range 4036c609719bSwdenkmtest - simple RAM test 4037c609719bSwdenkicache - enable or disable instruction cache 4038c609719bSwdenkdcache - enable or disable data cache 4039c609719bSwdenkreset - Perform RESET of the CPU 4040c609719bSwdenkecho - echo args to console 4041c609719bSwdenkversion - print monitor version 4042c609719bSwdenkhelp - print online help 4043c609719bSwdenk? - alias for 'help' 4044c609719bSwdenk 4045c609719bSwdenk 4046c609719bSwdenkMonitor Commands - Detailed Description: 4047c609719bSwdenk======================================== 4048c609719bSwdenk 4049c609719bSwdenkTODO. 4050c609719bSwdenk 4051c609719bSwdenkFor now: just type "help <command>". 4052c609719bSwdenk 4053c609719bSwdenk 4054c609719bSwdenkEnvironment Variables: 4055c609719bSwdenk====================== 4056c609719bSwdenk 4057c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4058c609719bSwdenkcan be made persistent by saving to Flash memory. 4059c609719bSwdenk 4060c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4061c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4062c609719bSwdenkwithout a value can be used to delete a variable from the 4063c609719bSwdenkenvironment. As long as you don't save the environment you are 4064c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4065c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4066c609719bSwdenk 4067c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4068c96f86eeSWolfgang Denk 4069c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4070c609719bSwdenk 4071c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4072c609719bSwdenk 4073c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4074c609719bSwdenk 4075c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4076c609719bSwdenk 4077c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4078c609719bSwdenk 4079c609719bSwdenk bootfile - Name of the image to load with TFTP 4080c609719bSwdenk 40817d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 40827d721e34SBartlomiej Sieka command can be restricted. This variable is given as 40837d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 40847d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 40857d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 40867d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4087c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4088c3624e6eSGrant Likely bootm_mapsize. 4089c3624e6eSGrant Likely 4090c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4091c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4092c3624e6eSGrant Likely defines the size of the memory region starting at base 4093c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4094c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4095c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4096c3624e6eSGrant Likely used otherwise. 40977d721e34SBartlomiej Sieka 40987d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 40997d721e34SBartlomiej Sieka command can be restricted. This variable is given as 41007d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 41017d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 41027d721e34SBartlomiej Sieka environment variable. 41037d721e34SBartlomiej Sieka 41044bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 41054bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 41064bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 41074bae9090SBartlomiej Sieka 4108c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4109c609719bSwdenk "bootp" will just load perform a lookup of the 4110c609719bSwdenk configuration from the BOOTP server, but not try to 4111c609719bSwdenk load any image using TFTP 4112c609719bSwdenk 4113c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4114c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4115c609719bSwdenk be automatically started (by internally calling 4116c609719bSwdenk "bootm") 4117c609719bSwdenk 41184a6fd34bSwdenk If set to "no", a standalone image passed to the 41194a6fd34bSwdenk "bootm" command will be copied to the load address 41204a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 41214a6fd34bSwdenk This can be used to load and uncompress arbitrary 41224a6fd34bSwdenk data. 41234a6fd34bSwdenk 4124a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4125a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4126fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4127fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4128fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4129fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4130fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4131fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4132fa34f6b2SShawn Guo access it during the boot procedure. 4133fa34f6b2SShawn Guo 4134a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4135a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4136a28afca5SDavid A. Long to work it must reside in writable memory, have 4137a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4138a28afca5SDavid A. Long add the information it needs into it, and the memory 4139a28afca5SDavid A. Long must be accessible by the kernel. 4140a28afca5SDavid A. Long 4141eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4142eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4143eea63e05SSimon Glass defined. 4144eea63e05SSimon Glass 414517ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 414617ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 414717ea1177Swdenk mode (400kHZ). This environment variable is used in 414817ea1177Swdenk initialization code. So, for changes to be effective 414917ea1177Swdenk it must be saved and board must be reset. 415017ea1177Swdenk 4151c609719bSwdenk initrd_high - restrict positioning of initrd images: 4152c609719bSwdenk If this variable is not set, initrd images will be 4153c609719bSwdenk copied to the highest possible address in RAM; this 4154c609719bSwdenk is usually what you want since it allows for 4155c609719bSwdenk maximum initrd size. If for some reason you want to 4156c609719bSwdenk make sure that the initrd image is loaded below the 41576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4158c609719bSwdenk variable to a value of "no" or "off" or "0". 4159c609719bSwdenk Alternatively, you can set it to a maximum upper 4160c609719bSwdenk address to use (U-Boot will still check that it 4161c609719bSwdenk does not overwrite the U-Boot stack and data). 4162c609719bSwdenk 4163c609719bSwdenk For instance, when you have a system with 16 MB 41647152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4165c609719bSwdenk you can do this by adding "mem=12M" to the value of 4166c609719bSwdenk the "bootargs" variable. However, now you must make 41677152b1d0Swdenk sure that the initrd image is placed in the first 4168c609719bSwdenk 12 MB as well - this can be done with 4169c609719bSwdenk 4170c609719bSwdenk setenv initrd_high 00c00000 4171c609719bSwdenk 417238b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 417338b99261Swdenk indication to U-Boot that all addresses are legal 417438b99261Swdenk for the Linux kernel, including addresses in flash 417538b99261Swdenk memory. In this case U-Boot will NOT COPY the 417638b99261Swdenk ramdisk at all. This may be useful to reduce the 417738b99261Swdenk boot time on your system, but requires that this 417838b99261Swdenk feature is supported by your Linux kernel. 417938b99261Swdenk 4180c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4181c609719bSwdenk 4182c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4183dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4184c609719bSwdenk 4185c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4186c609719bSwdenk 4187c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4188c609719bSwdenk 4189c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4190c609719bSwdenk 4191c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4192c609719bSwdenk 4193c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4194c609719bSwdenk 4195e2a53458SMike Frysinger ethprime - controls which interface is used first. 4196a3d991bdSwdenk 4197e2a53458SMike Frysinger ethact - controls which interface is currently active. 4198e2a53458SMike Frysinger For example you can do the following 4199a3d991bdSwdenk 420048690d80SHeiko Schocher => setenv ethact FEC 420148690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 420248690d80SHeiko Schocher => setenv ethact SCC 420348690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4204a3d991bdSwdenk 4205e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4206e1692577SMatthias Fuchs available network interfaces. 4207e1692577SMatthias Fuchs It just stays at the currently selected interface. 4208e1692577SMatthias Fuchs 4209a3d991bdSwdenk netretry - When set to "no" each network operation will 4210a3d991bdSwdenk either succeed or fail without retrying. 42116e592385Swdenk When set to "once" the network operation will 42126e592385Swdenk fail when all the available network interfaces 42136e592385Swdenk are tried once without success. 4214a3d991bdSwdenk Useful on scripts which control the retry operation 4215a3d991bdSwdenk themselves. 4216a3d991bdSwdenk 4217b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4218a1cf027aSJean-Christophe PLAGNIOL-VILLARD 421928cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4220ecb0ccd9SWolfgang Denk UDP source port. 4221ecb0ccd9SWolfgang Denk 422228cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 422328cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 422428cb9375SWolfgang Denk 4225c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4226c96f86eeSWolfgang Denk we use the TFTP server's default block size 4227c96f86eeSWolfgang Denk 4228c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4229c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4230c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4231c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4232c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4233c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4234c96f86eeSWolfgang Denk with unreliable TFTP servers. 4235c96f86eeSWolfgang Denk 4236a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 423711ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4238a3d991bdSwdenk VLAN tagged frames. 4239c609719bSwdenk 4240dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4241dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4242dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4243dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4244dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4245dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4246dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4247dc0b7b0eSJason Hobbs 4248dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4249dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4250dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4251dc0b7b0eSJason Hobbs 4252dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4253dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4254dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4255dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4256dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4257dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4258dc0b7b0eSJason Hobbs 4259c609719bSwdenkThe following environment variables may be used and automatically 4260c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4261c609719bSwdenkdepending the information provided by your boot server: 4262c609719bSwdenk 4263c609719bSwdenk bootfile - see above 4264c609719bSwdenk dnsip - IP address of your Domain Name Server 4265fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4266c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4267c609719bSwdenk hostname - Target hostname 4268c609719bSwdenk ipaddr - see above 4269c609719bSwdenk netmask - Subnet Mask 4270c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4271c609719bSwdenk serverip - see above 4272c609719bSwdenk 4273c609719bSwdenk 4274c609719bSwdenkThere are two special Environment Variables: 4275c609719bSwdenk 4276c609719bSwdenk serial# - contains hardware identification information such 4277c609719bSwdenk as type string and/or serial number 4278c609719bSwdenk ethaddr - Ethernet address 4279c609719bSwdenk 4280c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4281c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4282c609719bSwdenkonce they have been set once. 4283c609719bSwdenk 4284c609719bSwdenk 4285c1551ea8SstroeseFurther special Environment Variables: 4286c1551ea8Sstroese 4287c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4288c1551ea8Sstroese with the "version" command. This variable is 4289c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4290c1551ea8Sstroese 4291c1551ea8Sstroese 4292c609719bSwdenkPlease note that changes to some configuration parameters may take 4293c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4294c609719bSwdenk 4295c609719bSwdenk 4296170ab110SJoe HershbergerCallback functions for environment variables: 4297170ab110SJoe Hershberger--------------------------------------------- 4298170ab110SJoe Hershberger 4299170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4300170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 4301170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4302170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4303170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4304170ab110SJoe Hershberger 4305170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4306170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 4307170ab110SJoe Hershberger 4308170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 4309170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 4310170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 4311170ab110SJoe Hershbergerassociations. The list must be in the following format: 4312170ab110SJoe Hershberger 4313170ab110SJoe Hershberger entry = variable_name[:callback_name] 4314170ab110SJoe Hershberger list = entry[,list] 4315170ab110SJoe Hershberger 4316170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 4317170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 4318170ab110SJoe Hershberger 4319170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 4320170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 4321170ab110SJoe Hershbergeroverride any association in the static list. You can define 4322170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 4323170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 4324170ab110SJoe Hershberger 4325170ab110SJoe Hershberger 4326f07771ccSwdenkCommand Line Parsing: 4327f07771ccSwdenk===================== 4328f07771ccSwdenk 4329f07771ccSwdenkThere are two different command line parsers available with U-Boot: 43307152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4331f07771ccSwdenk 4332f07771ccSwdenkOld, simple command line parser: 4333f07771ccSwdenk-------------------------------- 4334f07771ccSwdenk 4335f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4336f07771ccSwdenk- several commands on one line, separated by ';' 4337fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4338f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4339f07771ccSwdenk for example: 4340fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4341f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4342f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4343f07771ccSwdenk 4344f07771ccSwdenkHush shell: 4345f07771ccSwdenk----------- 4346f07771ccSwdenk 4347f07771ccSwdenk- similar to Bourne shell, with control structures like 4348f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4349f07771ccSwdenk until...do...done, ... 4350f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4351f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4352f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4353f07771ccSwdenk command 4354f07771ccSwdenk 4355f07771ccSwdenkGeneral rules: 4356f07771ccSwdenk-------------- 4357f07771ccSwdenk 4358f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4359f07771ccSwdenk command) contains several commands separated by semicolon, and 4360f07771ccSwdenk one of these commands fails, then the remaining commands will be 4361f07771ccSwdenk executed anyway. 4362f07771ccSwdenk 4363f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 436411ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4365f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4366f07771ccSwdenk variables are not executed. 4367f07771ccSwdenk 4368c609719bSwdenkNote for Redundant Ethernet Interfaces: 4369c609719bSwdenk======================================= 4370c609719bSwdenk 437111ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4372c609719bSwdenksuch configurations and is capable of automatic selection of a 43737152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4374c609719bSwdenk 4375c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4376c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4377c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4378c609719bSwdenk 4379c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4380c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4381c609719bSwdenkding setting in the environment; if the corresponding environment 4382c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4383c609719bSwdenk 4384c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4385c609719bSwdenk environment, the SROM's address is used. 4386c609719bSwdenk 4387c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4388c609719bSwdenk environment exists, then the value from the environment variable is 4389c609719bSwdenk used. 4390c609719bSwdenk 4391c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4392c609719bSwdenk both addresses are the same, this MAC address is used. 4393c609719bSwdenk 4394c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4395c609719bSwdenk addresses differ, the value from the environment is used and a 4396c609719bSwdenk warning is printed. 4397c609719bSwdenk 4398c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4399c609719bSwdenk is raised. 4400c609719bSwdenk 4401ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4402ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4403ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4404ecee9324SBen WarrenThe naming convention is as follows: 4405ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4406c609719bSwdenk 4407c609719bSwdenkImage Formats: 4408c609719bSwdenk============== 4409c609719bSwdenk 44103310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 44113310c549SMarian Balakowiczimages in two formats: 44123310c549SMarian Balakowicz 44133310c549SMarian BalakowiczNew uImage format (FIT) 44143310c549SMarian Balakowicz----------------------- 44153310c549SMarian Balakowicz 44163310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 44173310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 44183310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 44193310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 44203310c549SMarian Balakowicz 44213310c549SMarian Balakowicz 44223310c549SMarian BalakowiczOld uImage format 44233310c549SMarian Balakowicz----------------- 44243310c549SMarian Balakowicz 44253310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 44263310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 44273310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4428c609719bSwdenk 4429c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4430c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4431f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4432f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4433f5ed9e39SPeter Tyser INTEGRITY). 44347b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4435afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4436afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4437c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4438c609719bSwdenk* Load Address 4439c609719bSwdenk* Entry Point 4440c609719bSwdenk* Image Name 4441c609719bSwdenk* Image Timestamp 4442c609719bSwdenk 4443c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4444c609719bSwdenkand the data portions of the image are secured against corruption by 4445c609719bSwdenkCRC32 checksums. 4446c609719bSwdenk 4447c609719bSwdenk 4448c609719bSwdenkLinux Support: 4449c609719bSwdenk============== 4450c609719bSwdenk 4451c609719bSwdenkAlthough U-Boot should support any OS or standalone application 44527152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4453c609719bSwdenkU-Boot. 4454c609719bSwdenk 4455c609719bSwdenkU-Boot includes many features that so far have been part of some 4456c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4457c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4458c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 44597152b1d0Swdenkserves several purposes: 4460c609719bSwdenk 4461c609719bSwdenk- the same features can be used for other OS or standalone 4462c609719bSwdenk applications (for instance: using compressed images to reduce the 4463c609719bSwdenk Flash memory footprint) 4464c609719bSwdenk 4465c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 44667152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4467c609719bSwdenk 4468c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4469c609719bSwdenk images; of course this also means that different kernel images can 4470c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4471c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4472c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4473c609719bSwdenk software is easier now. 4474c609719bSwdenk 4475c609719bSwdenk 4476c609719bSwdenkLinux HOWTO: 4477c609719bSwdenk============ 4478c609719bSwdenk 4479c609719bSwdenkPorting Linux to U-Boot based systems: 4480c609719bSwdenk--------------------------------------- 4481c609719bSwdenk 4482c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4483c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4484c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4485c609719bSwdenkLinux :-). 4486c609719bSwdenk 4487a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4488c609719bSwdenk 4489c609719bSwdenkJust make sure your machine specific header file (for instance 4490c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 44911dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 44921dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 44936d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4494c609719bSwdenk 4495c609719bSwdenk 4496c609719bSwdenkConfiguring the Linux kernel: 4497c609719bSwdenk----------------------------- 4498c609719bSwdenk 4499c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4500c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4501c609719bSwdenk 4502c609719bSwdenk 4503c609719bSwdenkBuilding a Linux Image: 4504c609719bSwdenk----------------------- 4505c609719bSwdenk 450624ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 450724ee89b9Swdenknot used. If you use recent kernel source, a new build target 450824ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 450924ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 451024ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 451124ee89b9Swdenk100% compatible format. 4512c609719bSwdenk 4513c609719bSwdenkExample: 4514c609719bSwdenk 4515c609719bSwdenk make TQM850L_config 4516c609719bSwdenk make oldconfig 4517c609719bSwdenk make dep 451824ee89b9Swdenk make uImage 4519c609719bSwdenk 452024ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 452124ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 452224ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4523c609719bSwdenk 452424ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 452524ee89b9Swdenk 452624ee89b9Swdenk* convert the kernel into a raw binary image: 452724ee89b9Swdenk 452824ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 452924ee89b9Swdenk -R .note -R .comment \ 453024ee89b9Swdenk -S vmlinux linux.bin 453124ee89b9Swdenk 453224ee89b9Swdenk* compress the binary image: 453324ee89b9Swdenk 453424ee89b9Swdenk gzip -9 linux.bin 453524ee89b9Swdenk 453624ee89b9Swdenk* package compressed binary image for U-Boot: 453724ee89b9Swdenk 453824ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 453924ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 454024ee89b9Swdenk -d linux.bin.gz uImage 454124ee89b9Swdenk 454224ee89b9Swdenk 454324ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 454424ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 454524ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 454624ee89b9Swdenkbyte header containing information about target architecture, 454724ee89b9Swdenkoperating system, image type, compression method, entry points, time 454824ee89b9Swdenkstamp, CRC32 checksums, etc. 454924ee89b9Swdenk 455024ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 455124ee89b9Swdenkprint the header information, or to build new images. 4552c609719bSwdenk 4553c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4554c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4555c609719bSwdenkchecksum verification: 4556c609719bSwdenk 4557c609719bSwdenk tools/mkimage -l image 4558c609719bSwdenk -l ==> list image header information 4559c609719bSwdenk 4560c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4561c609719bSwdenkfrom a "data file" which is used as image payload: 4562c609719bSwdenk 4563c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4564c609719bSwdenk -n name -d data_file image 4565c609719bSwdenk -A ==> set architecture to 'arch' 4566c609719bSwdenk -O ==> set operating system to 'os' 4567c609719bSwdenk -T ==> set image type to 'type' 4568c609719bSwdenk -C ==> set compression type 'comp' 4569c609719bSwdenk -a ==> set load address to 'addr' (hex) 4570c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4571c609719bSwdenk -n ==> set image name to 'name' 4572c609719bSwdenk -d ==> use image data from 'datafile' 4573c609719bSwdenk 457469459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 457569459791Swdenkaddress (0x00000000), but the entry point address depends on the 457669459791Swdenkkernel version: 4577c609719bSwdenk 4578c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 457924ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4580c609719bSwdenk 4581c609719bSwdenkSo a typical call to build a U-Boot image would read: 4582c609719bSwdenk 458324ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 458424ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4585a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 458624ee89b9Swdenk > examples/uImage.TQM850L 458724ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4588c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4589c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4590c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4591c609719bSwdenk Load Address: 0x00000000 459224ee89b9Swdenk Entry Point: 0x00000000 4593c609719bSwdenk 4594c609719bSwdenkTo verify the contents of the image (or check for corruption): 4595c609719bSwdenk 459624ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 459724ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4598c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4599c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4600c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4601c609719bSwdenk Load Address: 0x00000000 460224ee89b9Swdenk Entry Point: 0x00000000 4603c609719bSwdenk 4604c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4605c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4606c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4607c609719bSwdenkneed to be uncompressed: 4608c609719bSwdenk 4609a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 461024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 461124ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4612a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 461324ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 461424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4615c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4616c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4617c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4618c609719bSwdenk Load Address: 0x00000000 461924ee89b9Swdenk Entry Point: 0x00000000 4620c609719bSwdenk 4621c609719bSwdenk 4622c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4623c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4624c609719bSwdenk 4625c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4626c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4627c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4628c609719bSwdenk Image Name: Simple Ramdisk Image 4629c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4630c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4631c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4632c609719bSwdenk Load Address: 0x00000000 4633c609719bSwdenk Entry Point: 0x00000000 4634c609719bSwdenk 4635c609719bSwdenk 4636c609719bSwdenkInstalling a Linux Image: 4637c609719bSwdenk------------------------- 4638c609719bSwdenk 4639c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4640c609719bSwdenkyou must convert the image to S-Record format: 4641c609719bSwdenk 4642c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4643c609719bSwdenk 4644c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4645c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4646c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4647c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4648c609719bSwdenkcommand. 4649c609719bSwdenk 4650c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4651c609719bSwdenkTQM8xxL is in the first Flash bank): 4652c609719bSwdenk 4653c609719bSwdenk => erase 40100000 401FFFFF 4654c609719bSwdenk 4655c609719bSwdenk .......... done 4656c609719bSwdenk Erased 8 sectors 4657c609719bSwdenk 4658c609719bSwdenk => loads 40100000 4659c609719bSwdenk ## Ready for S-Record download ... 4660c609719bSwdenk ~>examples/image.srec 4661c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4662c609719bSwdenk ... 4663c609719bSwdenk 15989 15990 15991 15992 4664c609719bSwdenk [file transfer complete] 4665c609719bSwdenk [connected] 4666c609719bSwdenk ## Start Addr = 0x00000000 4667c609719bSwdenk 4668c609719bSwdenk 4669c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4670c609719bSwdenkthis includes a checksum verification so you can be sure no data 4671c609719bSwdenkcorruption happened: 4672c609719bSwdenk 4673c609719bSwdenk => imi 40100000 4674c609719bSwdenk 4675c609719bSwdenk ## Checking Image at 40100000 ... 4676c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4677c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4678c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4679c609719bSwdenk Load Address: 00000000 4680c609719bSwdenk Entry Point: 0000000c 4681c609719bSwdenk Verifying Checksum ... OK 4682c609719bSwdenk 4683c609719bSwdenk 4684c609719bSwdenkBoot Linux: 4685c609719bSwdenk----------- 4686c609719bSwdenk 4687c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4688c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4689c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4690c609719bSwdenkparameters. You can check and modify this variable using the 4691c609719bSwdenk"printenv" and "setenv" commands: 4692c609719bSwdenk 4693c609719bSwdenk 4694c609719bSwdenk => printenv bootargs 4695c609719bSwdenk bootargs=root=/dev/ram 4696c609719bSwdenk 4697c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4698c609719bSwdenk 4699c609719bSwdenk => printenv bootargs 4700c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4701c609719bSwdenk 4702c609719bSwdenk => bootm 40020000 4703c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4704c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4705c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4706c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4707c609719bSwdenk Load Address: 00000000 4708c609719bSwdenk Entry Point: 0000000c 4709c609719bSwdenk Verifying Checksum ... OK 4710c609719bSwdenk Uncompressing Kernel Image ... OK 4711c609719bSwdenk 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 4712c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4713c609719bSwdenk time_init: decrementer frequency = 187500000/60 4714c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4715c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4716c609719bSwdenk ... 4717c609719bSwdenk 471811ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 47197152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4720c609719bSwdenkformat!) to the "bootm" command: 4721c609719bSwdenk 4722c609719bSwdenk => imi 40100000 40200000 4723c609719bSwdenk 4724c609719bSwdenk ## Checking Image at 40100000 ... 4725c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4726c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4727c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4728c609719bSwdenk Load Address: 00000000 4729c609719bSwdenk Entry Point: 0000000c 4730c609719bSwdenk Verifying Checksum ... OK 4731c609719bSwdenk 4732c609719bSwdenk ## Checking Image at 40200000 ... 4733c609719bSwdenk Image Name: Simple Ramdisk Image 4734c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4735c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4736c609719bSwdenk Load Address: 00000000 4737c609719bSwdenk Entry Point: 00000000 4738c609719bSwdenk Verifying Checksum ... OK 4739c609719bSwdenk 4740c609719bSwdenk => bootm 40100000 40200000 4741c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4742c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4743c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4744c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4745c609719bSwdenk Load Address: 00000000 4746c609719bSwdenk Entry Point: 0000000c 4747c609719bSwdenk Verifying Checksum ... OK 4748c609719bSwdenk Uncompressing Kernel Image ... OK 4749c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4750c609719bSwdenk Image Name: Simple Ramdisk Image 4751c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4752c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4753c609719bSwdenk Load Address: 00000000 4754c609719bSwdenk Entry Point: 00000000 4755c609719bSwdenk Verifying Checksum ... OK 4756c609719bSwdenk Loading Ramdisk ... OK 4757c609719bSwdenk 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 4758c609719bSwdenk Boot arguments: root=/dev/ram 4759c609719bSwdenk time_init: decrementer frequency = 187500000/60 4760c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4761c609719bSwdenk ... 4762c609719bSwdenk RAMDISK: Compressed image found at block 0 4763c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4764c609719bSwdenk 4765c609719bSwdenk bash# 4766c609719bSwdenk 47670267768eSMatthew McClintockBoot Linux and pass a flat device tree: 47680267768eSMatthew McClintock----------- 47690267768eSMatthew McClintock 47700267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 47710267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 47720267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 47730267768eSMatthew McClintockflat device tree: 47740267768eSMatthew McClintock 47750267768eSMatthew McClintock=> print oftaddr 47760267768eSMatthew McClintockoftaddr=0x300000 47770267768eSMatthew McClintock=> print oft 47780267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 47790267768eSMatthew McClintock=> tftp $oftaddr $oft 47800267768eSMatthew McClintockSpeed: 1000, full duplex 47810267768eSMatthew McClintockUsing TSEC0 device 47820267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 47830267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 47840267768eSMatthew McClintockLoad address: 0x300000 47850267768eSMatthew McClintockLoading: # 47860267768eSMatthew McClintockdone 47870267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 47880267768eSMatthew McClintock=> tftp $loadaddr $bootfile 47890267768eSMatthew McClintockSpeed: 1000, full duplex 47900267768eSMatthew McClintockUsing TSEC0 device 47910267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 47920267768eSMatthew McClintockFilename 'uImage'. 47930267768eSMatthew McClintockLoad address: 0x200000 47940267768eSMatthew McClintockLoading:############ 47950267768eSMatthew McClintockdone 47960267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 47970267768eSMatthew McClintock=> print loadaddr 47980267768eSMatthew McClintockloadaddr=200000 47990267768eSMatthew McClintock=> print oftaddr 48000267768eSMatthew McClintockoftaddr=0x300000 48010267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 48020267768eSMatthew McClintock## Booting image at 00200000 ... 48030267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 48040267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 48050267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 48060267768eSMatthew McClintock Load Address: 00000000 48070267768eSMatthew McClintock Entry Point: 00000000 48080267768eSMatthew McClintock Verifying Checksum ... OK 48090267768eSMatthew McClintock Uncompressing Kernel Image ... OK 48100267768eSMatthew McClintockBooting using flat device tree at 0x300000 48110267768eSMatthew McClintockUsing MPC85xx ADS machine description 48120267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 48130267768eSMatthew McClintock[snip] 48140267768eSMatthew McClintock 48150267768eSMatthew McClintock 48166069ff26SwdenkMore About U-Boot Image Types: 48176069ff26Swdenk------------------------------ 48186069ff26Swdenk 48196069ff26SwdenkU-Boot supports the following image types: 48206069ff26Swdenk 48216069ff26Swdenk "Standalone Programs" are directly runnable in the environment 48226069ff26Swdenk provided by U-Boot; it is expected that (if they behave 48236069ff26Swdenk well) you can continue to work in U-Boot after return from 48246069ff26Swdenk the Standalone Program. 48256069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 48266069ff26Swdenk will take over control completely. Usually these programs 48276069ff26Swdenk will install their own set of exception handlers, device 48286069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 48296069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 48306069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 48316069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 48326069ff26Swdenk being started. 48336069ff26Swdenk "Multi-File Images" contain several images, typically an OS 48346069ff26Swdenk (Linux) kernel image and one or more data images like 48356069ff26Swdenk RAMDisks. This construct is useful for instance when you want 48366069ff26Swdenk to boot over the network using BOOTP etc., where the boot 48376069ff26Swdenk server provides just a single image file, but you want to get 48386069ff26Swdenk for instance an OS kernel and a RAMDisk image. 48396069ff26Swdenk 48406069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 48416069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 48426069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 48436069ff26Swdenk Immediately after the terminating 0 follow the images, one by 48446069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 48456069ff26Swdenk a multiple of 4 bytes). 48466069ff26Swdenk 48476069ff26Swdenk "Firmware Images" are binary images containing firmware (like 48486069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 48496069ff26Swdenk flash memory. 48506069ff26Swdenk 48516069ff26Swdenk "Script files" are command sequences that will be executed by 48526069ff26Swdenk U-Boot's command interpreter; this feature is especially 48536069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 48546069ff26Swdenk as command interpreter. 48556069ff26Swdenk 485644f074c7SMarek VasutBooting the Linux zImage: 485744f074c7SMarek Vasut------------------------- 485844f074c7SMarek Vasut 485944f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 486044f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 486144f074c7SMarek Vasutas the syntax of "bootm" command. 486244f074c7SMarek Vasut 4863017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4864017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4865017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4866017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4867017e1f3fSMarek Vasut 4868c609719bSwdenk 4869c609719bSwdenkStandalone HOWTO: 4870c609719bSwdenk================= 4871c609719bSwdenk 4872c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4873c609719bSwdenkrun "standalone" applications, which can use some resources of 4874c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4875c609719bSwdenk 4876c609719bSwdenkTwo simple examples are included with the sources: 4877c609719bSwdenk 4878c609719bSwdenk"Hello World" Demo: 4879c609719bSwdenk------------------- 4880c609719bSwdenk 4881c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4882c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4883c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4884c609719bSwdenklike that: 4885c609719bSwdenk 4886c609719bSwdenk => loads 4887c609719bSwdenk ## Ready for S-Record download ... 4888c609719bSwdenk ~>examples/hello_world.srec 4889c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4890c609719bSwdenk [file transfer complete] 4891c609719bSwdenk [connected] 4892c609719bSwdenk ## Start Addr = 0x00040004 4893c609719bSwdenk 4894c609719bSwdenk => go 40004 Hello World! This is a test. 4895c609719bSwdenk ## Starting application at 0x00040004 ... 4896c609719bSwdenk Hello World 4897c609719bSwdenk argc = 7 4898c609719bSwdenk argv[0] = "40004" 4899c609719bSwdenk argv[1] = "Hello" 4900c609719bSwdenk argv[2] = "World!" 4901c609719bSwdenk argv[3] = "This" 4902c609719bSwdenk argv[4] = "is" 4903c609719bSwdenk argv[5] = "a" 4904c609719bSwdenk argv[6] = "test." 4905c609719bSwdenk argv[7] = "<NULL>" 4906c609719bSwdenk Hit any key to exit ... 4907c609719bSwdenk 4908c609719bSwdenk ## Application terminated, rc = 0x0 4909c609719bSwdenk 4910c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4911c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4912c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4913c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4914c609719bSwdenkcharacter, but this is just a demo program. The application can be 4915c609719bSwdenkcontrolled by the following keys: 4916c609719bSwdenk 4917c609719bSwdenk ? - print current values og the CPM Timer registers 4918c609719bSwdenk b - enable interrupts and start timer 4919c609719bSwdenk e - stop timer and disable interrupts 4920c609719bSwdenk q - quit application 4921c609719bSwdenk 4922c609719bSwdenk => loads 4923c609719bSwdenk ## Ready for S-Record download ... 4924c609719bSwdenk ~>examples/timer.srec 4925c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4926c609719bSwdenk [file transfer complete] 4927c609719bSwdenk [connected] 4928c609719bSwdenk ## Start Addr = 0x00040004 4929c609719bSwdenk 4930c609719bSwdenk => go 40004 4931c609719bSwdenk ## Starting application at 0x00040004 ... 4932c609719bSwdenk TIMERS=0xfff00980 4933c609719bSwdenk Using timer 1 4934c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4935c609719bSwdenk 4936c609719bSwdenkHit 'b': 4937c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4938c609719bSwdenk Enabling timer 4939c609719bSwdenkHit '?': 4940c609719bSwdenk [q, b, e, ?] ........ 4941c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4942c609719bSwdenkHit '?': 4943c609719bSwdenk [q, b, e, ?] . 4944c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4945c609719bSwdenkHit '?': 4946c609719bSwdenk [q, b, e, ?] . 4947c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4948c609719bSwdenkHit '?': 4949c609719bSwdenk [q, b, e, ?] . 4950c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4951c609719bSwdenkHit 'e': 4952c609719bSwdenk [q, b, e, ?] ...Stopping timer 4953c609719bSwdenkHit 'q': 4954c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4955c609719bSwdenk 4956c609719bSwdenk 495785ec0bccSwdenkMinicom warning: 495885ec0bccSwdenk================ 495985ec0bccSwdenk 49607152b1d0SwdenkOver time, many people have reported problems when trying to use the 496185ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 496285ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4963f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 496485ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4965e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 4966e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 4967e53515a2SKarl O. Pincfor help with kermit. 4968e53515a2SKarl O. Pinc 496985ec0bccSwdenk 497052f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 497152f52c14Swdenkconfiguration to your "File transfer protocols" section: 497252f52c14Swdenk 497352f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 497452f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 497552f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 497652f52c14Swdenk 497752f52c14Swdenk 4978c609719bSwdenkNetBSD Notes: 4979c609719bSwdenk============= 4980c609719bSwdenk 4981c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4982c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4983c609719bSwdenk 4984c609719bSwdenkBuilding requires a cross environment; it is known to work on 4985c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4986c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4987c609719bSwdenkNote that the cross-powerpc package does not install include files; 4988c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4989c609719bSwdenkmissing. This file has to be installed and patched manually: 4990c609719bSwdenk 4991c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4992c609719bSwdenk # mkdir powerpc 4993c609719bSwdenk # ln -s powerpc machine 4994c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4995c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4996c609719bSwdenk 4997c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4998c609719bSwdenkand U-Boot include files. 4999c609719bSwdenk 5000c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5001c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5002c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5003c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 50042a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5005c609719bSwdenk 5006c609719bSwdenk 5007c609719bSwdenkImplementation Internals: 5008c609719bSwdenk========================= 5009c609719bSwdenk 5010c609719bSwdenkThe following is not intended to be a complete description of every 5011c609719bSwdenkimplementation detail. However, it should help to understand the 5012c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5013c609719bSwdenkhardware. 5014c609719bSwdenk 5015c609719bSwdenk 5016c609719bSwdenkInitial Stack, Global Data: 5017c609719bSwdenk--------------------------- 5018c609719bSwdenk 5019c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5020c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5021c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5022c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5023c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5024c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5025c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5026c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5027c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5028c609719bSwdenklocked as (mis-) used as memory, etc. 5029c609719bSwdenk 50307152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 50310668236bSWolfgang Denk U-Boot mailing list: 503243d9616cSwdenk 503343d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 503443d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 503543d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 503643d9616cSwdenk ... 503743d9616cSwdenk 503843d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 503943d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 504043d9616cSwdenk require any physical RAM backing up the cache. The cleverness 504143d9616cSwdenk is that the cache is being used as a temporary supply of 504243d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 504311ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 504443d9616cSwdenk can see how this works by studying the cache architecture and 504543d9616cSwdenk operation in the architecture and processor-specific manuals. 504643d9616cSwdenk 504743d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 504843d9616cSwdenk is another option for the system designer to use as an 504911ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 505043d9616cSwdenk option should work for you. Using CS 4 should be fine if your 505143d9616cSwdenk board designers haven't used it for something that would 505243d9616cSwdenk cause you grief during the initial boot! It is frequently not 505343d9616cSwdenk used. 505443d9616cSwdenk 50556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 505643d9616cSwdenk with your processor/board/system design. The default value 505743d9616cSwdenk you will find in any recent u-boot distribution in 50588a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 505943d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 506043d9616cSwdenk it above 400_0000. Just make sure your board has no resources 506143d9616cSwdenk that are supposed to respond to that address! That code in 506243d9616cSwdenk start.S has been around a while and should work as is when 506343d9616cSwdenk you get the config right. 506443d9616cSwdenk 506543d9616cSwdenk -Chris Hallinan 506643d9616cSwdenk DS4.COM, Inc. 506743d9616cSwdenk 5068c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5069c609719bSwdenkcode for the initialization procedures: 5070c609719bSwdenk 5071c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5072c609719bSwdenk to write it. 5073c609719bSwdenk 507411ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5075c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 50767152b1d0Swdenk zation is performed later (when relocating to RAM). 5077c609719bSwdenk 5078c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5079c609719bSwdenk that. 5080c609719bSwdenk 5081c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5082c609719bSwdenknormal global data to share information beween the code. But it 5083c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5084c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5085c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5086c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5087c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5088c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5089c609719bSwdenkreserve for this purpose. 5090c609719bSwdenk 50917152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5092c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5093c609719bSwdenkGCC's implementation. 5094c609719bSwdenk 5095c609719bSwdenkFor PowerPC, the following registers have specific use: 5096c609719bSwdenk R1: stack pointer 5097e7670f6cSWolfgang Denk R2: reserved for system use 5098c609719bSwdenk R3-R4: parameter passing and return values 5099c609719bSwdenk R5-R10: parameter passing 5100c609719bSwdenk R13: small data area pointer 5101c609719bSwdenk R30: GOT pointer 5102c609719bSwdenk R31: frame pointer 5103c609719bSwdenk 5104e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5105e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5106e6bee808SJoakim Tjernlund going back and forth between asm and C) 5107c609719bSwdenk 5108e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5109c609719bSwdenk 5110c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5111c609719bSwdenk address of the global data structure is known at compile time), 5112c609719bSwdenk but it turned out that reserving a register results in somewhat 5113c609719bSwdenk smaller code - although the code savings are not that big (on 5114c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5115c609719bSwdenk 624 text + 127 data). 5116c609719bSwdenk 5117c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 51184c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 51194c58eb55SMike Frysinger 5120c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 51214c58eb55SMike Frysinger 5122c609719bSwdenkOn ARM, the following registers are used: 5123c609719bSwdenk 5124c609719bSwdenk R0: function argument word/integer result 5125c609719bSwdenk R1-R3: function argument word 5126c609719bSwdenk R9: GOT pointer 5127c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 5128c609719bSwdenk R11: argument (frame) pointer 5129c609719bSwdenk R12: temporary workspace 5130c609719bSwdenk R13: stack pointer 5131c609719bSwdenk R14: link register 5132c609719bSwdenk R15: program counter 5133c609719bSwdenk 5134c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 5135c609719bSwdenk 51360df01fd3SThomas ChouOn Nios II, the ABI is documented here: 51370df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 51380df01fd3SThomas Chou 51390df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 51400df01fd3SThomas Chou 51410df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 51420df01fd3SThomas Chou to access small data sections, so gp is free. 51430df01fd3SThomas Chou 5144afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5145afc1ce82SMacpaul Lin 5146afc1ce82SMacpaul Lin R0-R1: argument/return 5147afc1ce82SMacpaul Lin R2-R5: argument 5148afc1ce82SMacpaul Lin R15: temporary register for assembler 5149afc1ce82SMacpaul Lin R16: trampoline register 5150afc1ce82SMacpaul Lin R28: frame pointer (FP) 5151afc1ce82SMacpaul Lin R29: global pointer (GP) 5152afc1ce82SMacpaul Lin R30: link register (LP) 5153afc1ce82SMacpaul Lin R31: stack pointer (SP) 5154afc1ce82SMacpaul Lin PC: program counter (PC) 5155afc1ce82SMacpaul Lin 5156afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5157afc1ce82SMacpaul Lin 5158d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5159d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5160c609719bSwdenk 5161c609719bSwdenkMemory Management: 5162c609719bSwdenk------------------ 5163c609719bSwdenk 5164c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5165c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5166c609719bSwdenk 5167c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5168c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5169c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5170c609719bSwdenkphysical memory banks. 5171c609719bSwdenk 5172c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5173c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5174c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5175c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 51766d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5177c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5178c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5179c609719bSwdenk 5180c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5181c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5182c609719bSwdenk 5183c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5184c609719bSwdenkthis: 5185c609719bSwdenk 5186c609719bSwdenk 0x0000 0000 Exception Vector code 5187c609719bSwdenk : 5188c609719bSwdenk 0x0000 1FFF 5189c609719bSwdenk 0x0000 2000 Free for Application Use 5190c609719bSwdenk : 5191c609719bSwdenk : 5192c609719bSwdenk 5193c609719bSwdenk : 5194c609719bSwdenk : 5195c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5196c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5197c609719bSwdenk 0x00FC 0000 Malloc Arena 5198c609719bSwdenk : 5199c609719bSwdenk 0x00FD FFFF 5200c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5201c609719bSwdenk ... eventually: LCD or video framebuffer 5202c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5203c609719bSwdenk 0x00FF FFFF [End of RAM] 5204c609719bSwdenk 5205c609719bSwdenk 5206c609719bSwdenkSystem Initialization: 5207c609719bSwdenk---------------------- 5208c609719bSwdenk 5209c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 521011ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5211c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 52127152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5213c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5214c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5215c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5216c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5217c609719bSwdenkthe caches and the SIU. 5218c609719bSwdenk 5219c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5220c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5221c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5222c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5223c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5224c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5225c609719bSwdenkbanks. 5226c609719bSwdenk 5227c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 52287152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5229c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5230c609719bSwdenk0x00000000, with any additional banks following immediately to create 5231c609719bSwdenkcontiguous memory starting from 0. 5232c609719bSwdenk 5233c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5234c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5235c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5236c609719bSwdenkpages, and the final stack is set up. 5237c609719bSwdenk 5238c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5239c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5240c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5241c609719bSwdenknew address in RAM. 5242c609719bSwdenk 5243c609719bSwdenk 5244c609719bSwdenkU-Boot Porting Guide: 5245c609719bSwdenk---------------------- 5246c609719bSwdenk 5247c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 52486aff3115Swdenklist, October 2002] 5249c609719bSwdenk 5250c609719bSwdenk 5251c609719bSwdenkint main(int argc, char *argv[]) 5252c609719bSwdenk{ 5253c609719bSwdenk sighandler_t no_more_time; 5254c609719bSwdenk 5255c609719bSwdenk signal(SIGALRM, no_more_time); 5256c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5257c609719bSwdenk 5258c609719bSwdenk if (available_money > available_manpower) { 52596c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5260c609719bSwdenk return 0; 5261c609719bSwdenk } 5262c609719bSwdenk 5263c609719bSwdenk Download latest U-Boot source; 5264c609719bSwdenk 52650668236bSWolfgang Denk Subscribe to u-boot mailing list; 52666aff3115Swdenk 52676c3fef28SJerry Van Baren if (clueless) 5268c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5269c609719bSwdenk 5270c609719bSwdenk while (learning) { 5271c609719bSwdenk Read the README file in the top level directory; 52727cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 52736c3fef28SJerry Van Baren Read applicable doc/*.README; 5274c609719bSwdenk Read the source, Luke; 52756c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5276c609719bSwdenk } 5277c609719bSwdenk 52786c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 52796c3fef28SJerry Van Baren Buy a BDI3000; 52806c3fef28SJerry Van Baren else 5281c609719bSwdenk Add a lot of aggravation and time; 5282c609719bSwdenk 52836c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 52846c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 52856c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 52866c3fef28SJerry Van Baren } else { 5287c609719bSwdenk Create your own board support subdirectory; 52886c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 52896c3fef28SJerry Van Baren } 52906c3fef28SJerry Van Baren Edit new board/<myboard> files 52916c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5292c609719bSwdenk 52936c3fef28SJerry Van Baren while (!accepted) { 5294c609719bSwdenk while (!running) { 5295c609719bSwdenk do { 5296c609719bSwdenk Add / modify source code; 5297c609719bSwdenk } until (compiles); 5298c609719bSwdenk Debug; 5299c609719bSwdenk if (clueless) 5300c609719bSwdenk email("Hi, I am having problems..."); 5301c609719bSwdenk } 53026c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 53036c3fef28SJerry Van Baren if (reasonable critiques) 53046c3fef28SJerry Van Baren Incorporate improvements from email list code review; 53056c3fef28SJerry Van Baren else 53066c3fef28SJerry Van Baren Defend code as written; 53076c3fef28SJerry Van Baren } 5308c609719bSwdenk 5309c609719bSwdenk return 0; 5310c609719bSwdenk} 5311c609719bSwdenk 5312c609719bSwdenkvoid no_more_time (int sig) 5313c609719bSwdenk{ 5314c609719bSwdenk hire_a_guru(); 5315c609719bSwdenk} 5316c609719bSwdenk 5317c609719bSwdenk 5318c609719bSwdenkCoding Standards: 5319c609719bSwdenk----------------- 5320c609719bSwdenk 5321c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 53222c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 53237ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5324c609719bSwdenk 53252c051651SDetlev ZundelSource files originating from a different project (for example the 53262c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 53272c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 53282c051651SDetlev Zundelsources. 53292c051651SDetlev Zundel 53302c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 53312c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 53322c051651SDetlev Zundelin your code. 5333c609719bSwdenk 5334c178d3daSwdenkPlease also stick to the following formatting rules: 5335180d3f74Swdenk- remove any trailing white space 53367ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5337180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 53387ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5339180d3f74Swdenk- do not add trailing empty lines to source files 5340180d3f74Swdenk 5341c609719bSwdenkSubmissions which do not conform to the standards may be returned 5342c609719bSwdenkwith a request to reformat the changes. 5343c609719bSwdenk 5344c609719bSwdenk 5345c609719bSwdenkSubmitting Patches: 5346c609719bSwdenk------------------- 5347c609719bSwdenk 5348c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5349c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5350c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5351c609719bSwdenk 53520d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5353218ca724SWolfgang Denk 53540668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 53550668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 53560668236bSWolfgang Denk 5357c609719bSwdenkWhen you send a patch, please include the following information with 5358c609719bSwdenkit: 5359c609719bSwdenk 5360c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5361c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5362c609719bSwdenk patch actually fixes something. 5363c609719bSwdenk 5364c609719bSwdenk* For new features: a description of the feature and your 5365c609719bSwdenk implementation. 5366c609719bSwdenk 5367c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5368c609719bSwdenk 5369c609719bSwdenk* For major contributions, your entry to the CREDITS file 5370c609719bSwdenk 5371c609719bSwdenk* When you add support for a new board, don't forget to add this 53727ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5373c609719bSwdenk 5374c609719bSwdenk* If your patch adds new configuration options, don't forget to 5375c609719bSwdenk document these in the README file. 5376c609719bSwdenk 5377218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5378218ca724SWolfgang Denk recommended) you can easily generate the patch using the 53797ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5380218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5381218ca724SWolfgang Denk with some other mail clients. 5382c609719bSwdenk 5383218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5384218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5385218ca724SWolfgang Denk GNU diff. 53866dff5529Swdenk 5387218ca724SWolfgang Denk The current directory when running this command shall be the parent 5388218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5389218ca724SWolfgang Denk your patch includes sufficient directory information for the 5390218ca724SWolfgang Denk affected files). 5391218ca724SWolfgang Denk 5392218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5393218ca724SWolfgang Denk and compressed attachments must not be used. 5394c609719bSwdenk 539552f52c14Swdenk* If one logical set of modifications affects or creates several 539652f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 539752f52c14Swdenk 539852f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 539952f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 540052f52c14Swdenk 540152f52c14Swdenk 5402c609719bSwdenkNotes: 5403c609719bSwdenk 5404c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5405c609719bSwdenk source tree and make sure that no errors or warnings are reported 5406c609719bSwdenk for any of the boards. 5407c609719bSwdenk 5408c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5409c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5410c609719bSwdenk returned with a request to re-formatting / split it. 5411c609719bSwdenk 5412c609719bSwdenk* If you modify existing code, make sure that your new code does not 5413c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5414c609719bSwdenk When adding new features, these should compile conditionally only 5415c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5416c609719bSwdenk disabled must not need more memory than the old code without your 5417c609719bSwdenk modification. 541890dc6704Swdenk 54190668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 54200668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 54210668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 54220668236bSWolfgang Denk bigger than the size limit should be avoided. 5423