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 6197de0fe1aSJavier Martinez Canillas CONFIG_SYS_NS16550_BROKEN_TEMT 6207de0fe1aSJavier Martinez Canillas 6217de0fe1aSJavier Martinez Canillas 16550 UART set the Transmitter Empty (TEMT) Bit when all output 6227de0fe1aSJavier Martinez Canillas has finished and the transmitter is totally empty. U-Boot waits 6237de0fe1aSJavier Martinez Canillas for this bit to be set to initialize the serial console. On some 6247de0fe1aSJavier Martinez Canillas broken platforms this bit is not set in SPL making U-Boot to 6257de0fe1aSJavier Martinez Canillas hang while waiting for TEMT. Define this option to avoid it. 6267de0fe1aSJavier Martinez Canillas 6276705d81eSwdenk 628c609719bSwdenk- Console Interface: 629c609719bSwdenk Depending on board, define exactly one serial port 630c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 631c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 632c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 633c609719bSwdenk 634c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 635c609719bSwdenk port routines must be defined elsewhere 636c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 637c609719bSwdenk 638c609719bSwdenk CONFIG_CFB_CONSOLE 639c609719bSwdenk Enables console device for a color framebuffer. Needs following 640c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 641c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 642c609719bSwdenk (default big endian) 643c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 644c609719bSwdenk rectangle fill 645c609719bSwdenk (cf. smiLynxEM) 646c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 647c609719bSwdenk bit-blit (cf. smiLynxEM) 648c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 649c609719bSwdenk (cols=pitch) 650c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 651c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 652c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 653c609719bSwdenk (0-5, cf. cfb_console.c) 654c609719bSwdenk VIDEO_FB_ADRS framebuffer address 655c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 656c609719bSwdenk (i.e. i8042_kbd_init()) 657c609719bSwdenk VIDEO_TSTC_FCT test char fct 658c609719bSwdenk (i.e. i8042_tstc) 659c609719bSwdenk VIDEO_GETC_FCT get char fct 660c609719bSwdenk (i.e. i8042_getc) 661c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 662c609719bSwdenk (requires blink timer 663c609719bSwdenk cf. i8042.c) 6646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 665c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 666c609719bSwdenk upper right corner 667602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 668c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 669c609719bSwdenk upper left corner 670a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 671a6c7ad2fSwdenk linux_logo.h for logo. 672a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 673c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 67411ccc33fSMarcel Ziswiler additional board info beside 675c609719bSwdenk the logo 676c609719bSwdenk 67733a35bbbSPali Rohár When CONFIG_CFB_CONSOLE_ANSI is defined, console will support 67833a35bbbSPali Rohár a limited number of ANSI escape sequences (cursor control, 67933a35bbbSPali Rohár erase functions and limited graphics rendition control). 68033a35bbbSPali Rohár 681c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 682c609719bSwdenk default i/o. Serial console can be forced with 683c609719bSwdenk environment 'console=serial'. 684c609719bSwdenk 685a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 686a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 687a3ad8e26Swdenk the "silent" environment variable. See 688a3ad8e26Swdenk doc/README.silent for more information. 689a3ad8e26Swdenk 690c609719bSwdenk- Console Baudrate: 691c609719bSwdenk CONFIG_BAUDRATE - in bps 692c609719bSwdenk Select one of the baudrates listed in 6936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 6946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 695c609719bSwdenk 696c92fac91SHeiko Schocher- Console Rx buffer length 697c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 698c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 6992b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 700c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 701c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 702c92fac91SHeiko Schocher the SMC. 703c92fac91SHeiko Schocher 7049558b48aSGraeme Russ- Pre-Console Buffer: 7059558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 7069558b48aSGraeme Russ initialised etc) all console output is silently discarded. 7079558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 7089558b48aSGraeme Russ buffer any console messages prior to the console being 7099558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 7109558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 7119558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 7129558b48aSGraeme Russ bytes are output before the console is initialised, the 7139558b48aSGraeme Russ earlier bytes are discarded. 7149558b48aSGraeme Russ 7159558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 7169558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 7179558b48aSGraeme Russ 718046a37bdSSonny Rao- Safe printf() functions 719046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 720046a37bdSSonny Rao the printf() functions. These are defined in 721046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 722046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 723046a37bdSSonny Rao If this option is not given then these functions will 724046a37bdSSonny Rao silently discard their buffer size argument - this means 725046a37bdSSonny Rao you are not getting any overflow checking in this case. 726046a37bdSSonny Rao 727c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 728c609719bSwdenk Delay before automatically booting the default image; 729c609719bSwdenk set to -1 to disable autoboot. 73093d7212fSJoe Hershberger set to -2 to autoboot with no delay and not check for abort 73193d7212fSJoe Hershberger (even when CONFIG_ZERO_BOOTDELAY_CHECK is defined). 732c609719bSwdenk 733c609719bSwdenk See doc/README.autoboot for these options that 734c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 735c609719bSwdenk CONFIG_BOOT_RETRY_TIME 736c609719bSwdenk CONFIG_BOOT_RETRY_MIN 737c609719bSwdenk CONFIG_AUTOBOOT_KEYED 738c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 739c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 740c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 741c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 742c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 743c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 744c609719bSwdenk CONFIG_RESET_TO_RETRY 745c609719bSwdenk 746c609719bSwdenk- Autoboot Command: 747c609719bSwdenk CONFIG_BOOTCOMMAND 748c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 749c609719bSwdenk define a command string that is automatically executed 750c609719bSwdenk when no character is read on the console interface 751c609719bSwdenk within "Boot Delay" after reset. 752c609719bSwdenk 753c609719bSwdenk CONFIG_BOOTARGS 754c609719bSwdenk This can be used to pass arguments to the bootm 755c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 756c609719bSwdenk environment value "bootargs". 757c609719bSwdenk 758c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 759c609719bSwdenk The value of these goes into the environment as 760c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 761c609719bSwdenk as a convenience, when switching between booting from 76211ccc33fSMarcel Ziswiler RAM and NFS. 763c609719bSwdenk 764c609719bSwdenk- Pre-Boot Commands: 765c609719bSwdenk CONFIG_PREBOOT 766c609719bSwdenk 767c609719bSwdenk When this option is #defined, the existence of the 768c609719bSwdenk environment variable "preboot" will be checked 769c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 770c609719bSwdenk countdown and/or running the auto-boot command resp. 771c609719bSwdenk entering interactive mode. 772c609719bSwdenk 773c609719bSwdenk This feature is especially useful when "preboot" is 774c609719bSwdenk automatically generated or modified. For an example 775c609719bSwdenk see the LWMON board specific code: here "preboot" is 776c609719bSwdenk modified when the user holds down a certain 777c609719bSwdenk combination of keys on the (special) keyboard when 778c609719bSwdenk booting the systems 779c609719bSwdenk 780c609719bSwdenk- Serial Download Echo Mode: 781c609719bSwdenk CONFIG_LOADS_ECHO 782c609719bSwdenk If defined to 1, all characters received during a 783c609719bSwdenk serial download (using the "loads" command) are 784c609719bSwdenk echoed back. This might be needed by some terminal 785c609719bSwdenk emulations (like "cu"), but may as well just take 786c609719bSwdenk time on others. This setting #define's the initial 787c609719bSwdenk value of the "loads_echo" environment variable. 788c609719bSwdenk 789602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 790c609719bSwdenk CONFIG_KGDB_BAUDRATE 791c609719bSwdenk Select one of the baudrates listed in 7926d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 793c609719bSwdenk 794c609719bSwdenk- Monitor Functions: 795602ad3b3SJon Loeliger Monitor commands can be included or excluded 796602ad3b3SJon Loeliger from the build by using the #include files 797c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 798c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 799602ad3b3SJon Loeliger and augmenting with additional #define's 800602ad3b3SJon Loeliger for wanted commands. 801c609719bSwdenk 802602ad3b3SJon Loeliger The default command configuration includes all commands 803602ad3b3SJon Loeliger except those marked below with a "*". 804602ad3b3SJon Loeliger 805602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 806602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 807602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 808602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 809602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 810602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 811602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 812602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 813710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 814602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 815602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 816602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 817a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 818a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 819a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 820a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 821602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 822602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 823246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 824602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 825602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 8265e2b3e0cSJoe Hershberger CONFIG_CMD_ENV_CALLBACK * display details about env callbacks 827fffad71bSJoe Hershberger CONFIG_CMD_ENV_FLAGS * display details about env flags 8280c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 82903e2ecf6SStephen Warren CONFIG_CMD_EXT2 * ext2 command support 83003e2ecf6SStephen Warren CONFIG_CMD_EXT4 * ext4 command support 831bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 832602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 83303e2ecf6SStephen Warren CONFIG_CMD_FAT * FAT command support 834602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 835602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 836602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 83753fdc7efSAnton Staaf CONFIG_CMD_GETTIME * Get time since boot 838a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 839a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 840bf36c5d5SSimon Glass CONFIG_CMD_HASH * calculate hash / digest 841602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 842602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 843602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 844602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 845602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 846602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 8470c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 848c167cc02SJoe Hershberger CONFIG_CMD_INI * import data from an ini file into the env 849602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 850602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 851602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 852602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 8531ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 854d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 855d22c338eSJoe Hershberger (169.254.*.*) 856602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 857602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 85802c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 85902c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 86015a33e49SSimon Glass CONFIG_CMD_MEMINFO * Display detailed memory information 861602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 86256523f12Swdenk loop, loopw, mtest 863602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 864602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 865602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 86668d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 867602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 868602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 869e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 870e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 871602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 872602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 873602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 874602ad3b3SJon Loeliger host 875602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 876ff048ea9SKenneth Waters CONFIG_CMD_READ * Read raw data from partition 877602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 878602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 879602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 880602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 881602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 882602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 883602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 884602ad3b3SJon Loeliger (4xx only) 885f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 886c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 88702c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 88874de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 889602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 8907a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 8911fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 892da83bcd7SJoe Hershberger CONFIG_CMD_TIME * run command and report execution time (ARM specific) 893da83bcd7SJoe Hershberger CONFIG_CMD_TIMER * access to the system tick timer 894602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 895602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 896c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 897c609719bSwdenk 898c609719bSwdenk 899c609719bSwdenk EXAMPLE: If you want all functions except of network 900c609719bSwdenk support you can write: 901c609719bSwdenk 902602ad3b3SJon Loeliger #include "config_cmd_all.h" 903602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 904c609719bSwdenk 905213bf8c8SGerald Van Baren Other Commands: 906213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 907c609719bSwdenk 908c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 909602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 910c609719bSwdenk what you (and your U-Boot users) are doing. Data 911c609719bSwdenk cache cannot be enabled on systems like the 8xx or 912c609719bSwdenk 8260 (where accesses to the IMMR region must be 913c609719bSwdenk uncached), and it cannot be disabled on all other 914c609719bSwdenk systems where we (mis-) use the data cache to hold an 915c609719bSwdenk initial stack and some data. 916c609719bSwdenk 917c609719bSwdenk 918c609719bSwdenk XXX - this list needs to get updated! 919c609719bSwdenk 92045ba8077SSimon Glass- Device tree: 92145ba8077SSimon Glass CONFIG_OF_CONTROL 92245ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 92345ba8077SSimon Glass to configure its devices, instead of relying on statically 92445ba8077SSimon Glass compiled #defines in the board file. This option is 92545ba8077SSimon Glass experimental and only available on a few boards. The device 92645ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 92745ba8077SSimon Glass 9282c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 9292c0f79e4SSimon Glass be done using one of the two options below: 930bbb0b128SSimon Glass 931bbb0b128SSimon Glass CONFIG_OF_EMBED 932bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 933bbb0b128SSimon Glass binary in its image. This device tree file should be in the 934bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 935bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 936bbb0b128SSimon Glass the global data structure as gd->blob. 93745ba8077SSimon Glass 9382c0f79e4SSimon Glass CONFIG_OF_SEPARATE 9392c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 9402c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 9412c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 9422c0f79e4SSimon Glass 9432c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 9442c0f79e4SSimon Glass 9452c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 9462c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 9472c0f79e4SSimon Glass still use the individual files if you need something more 9482c0f79e4SSimon Glass exotic. 9492c0f79e4SSimon Glass 950c609719bSwdenk- Watchdog: 951c609719bSwdenk CONFIG_WATCHDOG 952c609719bSwdenk If this variable is defined, it enables watchdog 9536abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 9546abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 9556abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 9566abe6fb6SDetlev Zundel register. When supported for a specific SoC is 9576abe6fb6SDetlev Zundel available, then no further board specific code should 9586abe6fb6SDetlev Zundel be needed to use it. 9596abe6fb6SDetlev Zundel 9606abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 9616abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 9626abe6fb6SDetlev Zundel SoC, then define this variable and provide board 9636abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 964c609719bSwdenk 965c1551ea8Sstroese- U-Boot Version: 966c1551ea8Sstroese CONFIG_VERSION_VARIABLE 967c1551ea8Sstroese If this variable is defined, an environment variable 968c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 969c1551ea8Sstroese version as printed by the "version" command. 970a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 971a1ea8e51SBenoît Thébaudeau next reset. 972c1551ea8Sstroese 973c609719bSwdenk- Real-Time Clock: 974c609719bSwdenk 975602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 976c609719bSwdenk has to be selected, too. Define exactly one of the 977c609719bSwdenk following options: 978c609719bSwdenk 979c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 980c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 9814e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 982c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 9831cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 984c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 9857f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 9863bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 9879536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 9884c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 9896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 99071d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 99171d19f30SHeiko Schocher RV3029 RTC. 992c609719bSwdenk 993b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 994b37c7e5eSwdenk must also be configured. See I2C Support, below. 995b37c7e5eSwdenk 996e92739d3SPeter Tyser- GPIO Support: 997e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 998e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 999e92739d3SPeter Tyser 10005dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 10015dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 10025dec49caSChris Packham pins supported by a particular chip. 10035dec49caSChris Packham 1004e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 1005e92739d3SPeter Tyser must also be configured. See I2C Support, below. 1006e92739d3SPeter Tyser 1007c609719bSwdenk- Timestamp Support: 1008c609719bSwdenk 1009c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 1010c609719bSwdenk (date and time) of an image is printed by image 1011c609719bSwdenk commands like bootm or iminfo. This option is 1012602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 1013c609719bSwdenk 1014923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 1015923c46f9SKarl O. Pinc Zero or more of the following: 1016923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 1017923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 1018923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 1019923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 1020923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 1021923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 1022923c46f9SKarl O. Pinc disk/part_efi.c 1023923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 1024c609719bSwdenk 1025602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 1026218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 1027923c46f9SKarl O. Pinc least one non-MTD partition type as well. 1028c609719bSwdenk 1029c609719bSwdenk- IDE Reset method: 10304d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 10314d13cbadSwdenk board configurations files but used nowhere! 1032c609719bSwdenk 10334d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 10344d13cbadSwdenk be performed by calling the function 10354d13cbadSwdenk ide_set_reset(int reset) 10364d13cbadSwdenk which has to be defined in a board specific file 1037c609719bSwdenk 1038c609719bSwdenk- ATAPI Support: 1039c609719bSwdenk CONFIG_ATAPI 1040c609719bSwdenk 1041c609719bSwdenk Set this to enable ATAPI support. 1042c609719bSwdenk 1043c40b2956Swdenk- LBA48 Support 1044c40b2956Swdenk CONFIG_LBA48 1045c40b2956Swdenk 1046c40b2956Swdenk Set this to enable support for disks larger than 137GB 10474b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 1048c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 1049c40b2956Swdenk support disks up to 2.1TB. 1050c40b2956Swdenk 10516d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 1052c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 1053c40b2956Swdenk Default is 32bit. 1054c40b2956Swdenk 1055c609719bSwdenk- SCSI Support: 1056c609719bSwdenk At the moment only there is only support for the 1057c609719bSwdenk SYM53C8XX SCSI controller; define 1058c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 1059c609719bSwdenk 10606d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 10616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 10626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1063c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1064c609719bSwdenk devices. 10656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1066c609719bSwdenk 1067447c031bSStefan Reinauer The environment variable 'scsidevs' is set to the number of 1068447c031bSStefan Reinauer SCSI devices found during the last scan. 1069447c031bSStefan Reinauer 1070c609719bSwdenk- NETWORK Support (PCI): 1071682011ffSwdenk CONFIG_E1000 1072ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1073ce5207e1SKyle Moffett 1074ce5207e1SKyle Moffett CONFIG_E1000_SPI 1075ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1076ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1077ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1078ce5207e1SKyle Moffett 1079ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1080ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1081ce5207e1SKyle Moffett example with the "sspi" command. 1082ce5207e1SKyle Moffett 1083ce5207e1SKyle Moffett CONFIG_CMD_E1000 1084ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1085ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1086682011ffSwdenk 1087ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 108811ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1089ac3315c2SAndre Schwarz 1090c609719bSwdenk CONFIG_EEPRO100 1091c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 109211ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1093c609719bSwdenk write routine for first time initialisation. 1094c609719bSwdenk 1095c609719bSwdenk CONFIG_TULIP 1096c609719bSwdenk Support for Digital 2114x chips. 1097c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1098c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1099c609719bSwdenk 1100c609719bSwdenk CONFIG_NATSEMI 1101c609719bSwdenk Support for National dp83815 chips. 1102c609719bSwdenk 1103c609719bSwdenk CONFIG_NS8382X 1104c609719bSwdenk Support for National dp8382[01] gigabit chips. 1105c609719bSwdenk 110645219c46Swdenk- NETWORK Support (other): 110745219c46Swdenk 1108c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1109c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1110c041e9d2SJens Scharsig 1111c041e9d2SJens Scharsig CONFIG_RMII 1112c041e9d2SJens Scharsig Define this to use reduced MII inteface 1113c041e9d2SJens Scharsig 1114c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1115c041e9d2SJens Scharsig If this defined, the driver is quiet. 1116c041e9d2SJens Scharsig The driver doen't show link status messages. 1117c041e9d2SJens Scharsig 1118efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1119efdd7319SRob Herring Support for the Calxeda XGMAC device 1120efdd7319SRob Herring 11213bb46d23SAshok CONFIG_LAN91C96 112245219c46Swdenk Support for SMSC's LAN91C96 chips. 112345219c46Swdenk 112445219c46Swdenk CONFIG_LAN91C96_BASE 112545219c46Swdenk Define this to hold the physical address 112645219c46Swdenk of the LAN91C96's I/O space 112745219c46Swdenk 112845219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 112945219c46Swdenk Define this to enable 32 bit addressing 113045219c46Swdenk 11313bb46d23SAshok CONFIG_SMC91111 1132f39748aeSwdenk Support for SMSC's LAN91C111 chip 1133f39748aeSwdenk 1134f39748aeSwdenk CONFIG_SMC91111_BASE 1135f39748aeSwdenk Define this to hold the physical address 1136f39748aeSwdenk of the device (I/O space) 1137f39748aeSwdenk 1138f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1139f39748aeSwdenk Define this if data bus is 32 bits 1140f39748aeSwdenk 1141f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1142f39748aeSwdenk Define this to use i/o functions instead of macros 1143f39748aeSwdenk (some hardware wont work with macros) 1144f39748aeSwdenk 1145dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1146dc02badaSHeiko Schocher Support for davinci emac 1147dc02badaSHeiko Schocher 1148dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1149dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1150dc02badaSHeiko Schocher 1151b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1152b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1153b3dbf4a5SMacpaul Lin 1154b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1155b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1156b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1157b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1158b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1159b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1160b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1161b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1162b3dbf4a5SMacpaul Lin 1163c2fff331SMike Rapoport CONFIG_SMC911X 1164557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1165557b377dSJens Gehrlein 1166c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1167557b377dSJens Gehrlein Define this to hold the physical address 1168557b377dSJens Gehrlein of the device (I/O space) 1169557b377dSJens Gehrlein 1170c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1171557b377dSJens Gehrlein Define this if data bus is 32 bits 1172557b377dSJens Gehrlein 1173c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1174557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1175557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1176c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1177557b377dSJens Gehrlein 11783d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 11793d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 11803d0075faSYoshihiro Shimoda 11813d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 11823d0075faSYoshihiro Shimoda Define the number of ports to be used 11833d0075faSYoshihiro Shimoda 11843d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 11853d0075faSYoshihiro Shimoda Define the ETH PHY's address 11863d0075faSYoshihiro Shimoda 118768260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 118868260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 118968260aabSYoshihiro Shimoda 11905e124724SVadim Bendebury- TPM Support: 11915e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 11925e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 11935e124724SVadim Bendebury per system is supported at this time. 11945e124724SVadim Bendebury 11955e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 11965e124724SVadim Bendebury Base address where the generic TPM device is mapped 11975e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 11985e124724SVadim Bendebury 0xfed40000. 11995e124724SVadim Bendebury 1200c609719bSwdenk- USB Support: 1201c609719bSwdenk At the moment only the UHCI host controller is 12024d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1203c609719bSwdenk CONFIG_USB_UHCI to enable it. 1204c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 120530d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1206c609719bSwdenk storage devices. 1207c609719bSwdenk Note: 1208c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1209c609719bSwdenk (TEAC FD-05PUB). 12104d13cbadSwdenk MPC5200 USB requires additional defines: 12114d13cbadSwdenk CONFIG_USB_CLOCK 12124d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1213307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1214307ecb6dSEric Millbrandt for USB on PSC3 12154d13cbadSwdenk CONFIG_USB_CONFIG 12164d13cbadSwdenk for differential drivers: 0x00001000 12174d13cbadSwdenk for single ended drivers: 0x00005000 1218307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1219307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 12206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1221fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1222fdcfaa1bSZhang Wei instead of using asynchronous interrupts 12234d13cbadSwdenk 12249ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 12259ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 12269ab4ce22SSimon Glass 122716c8d5e7SWolfgang Denk- USB Device: 122816c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 122916c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 123016c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 123111ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 123216c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 123316c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 123416c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 123516c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 123616c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 123716c8d5e7SWolfgang Denk a Linux host by 123816c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 123916c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 124016c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 124116c8d5e7SWolfgang Denk might be defined in YourBoardName.h 124216c8d5e7SWolfgang Denk 124316c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 124416c8d5e7SWolfgang Denk Define this to build a UDC device 124516c8d5e7SWolfgang Denk 124616c8d5e7SWolfgang Denk CONFIG_USB_TTY 124716c8d5e7SWolfgang Denk Define this to have a tty type of device available to 124816c8d5e7SWolfgang Denk talk to the UDC device 124916c8d5e7SWolfgang Denk 1250f9da0f89SVipin KUMAR CONFIG_USBD_HS 1251f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1252f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1253f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1254f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1255f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1256f9da0f89SVipin KUMAR speed. 1257f9da0f89SVipin KUMAR 12586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 125916c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 126016c8d5e7SWolfgang Denk be set to usbtty. 126116c8d5e7SWolfgang Denk 126216c8d5e7SWolfgang Denk mpc8xx: 12636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 126416c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 12656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 126616c8d5e7SWolfgang Denk 12676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 126816c8d5e7SWolfgang Denk Derive USB clock from brgclk 12696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 127016c8d5e7SWolfgang Denk 127116c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 127216c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 127316c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 127416c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 127516c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 127616c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 127716c8d5e7SWolfgang Denk 127816c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 127916c8d5e7SWolfgang Denk Define this string as the name of your company for 128016c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 128116c8d5e7SWolfgang Denk 128216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 128316c8d5e7SWolfgang Denk Define this string as the name of your product 128416c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 128516c8d5e7SWolfgang Denk 128616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 128716c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 128816c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 128916c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 129016c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 129116c8d5e7SWolfgang Denk 129216c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 129316c8d5e7SWolfgang Denk Define this as the unique Product ID 129416c8d5e7SWolfgang Denk for your device 129516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1296c609719bSwdenk 1297d70a560fSIgor Grinberg- ULPI Layer Support: 1298d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1299d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1300d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1301d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1302d70a560fSIgor Grinberg viewport is supported. 1303d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1304d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 13056d365ea0SLucas Stach If your ULPI phy needs a different reference clock than the 13066d365ea0SLucas Stach standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to 13076d365ea0SLucas Stach the appropriate value in Hz. 1308c609719bSwdenk 1309c609719bSwdenk- MMC Support: 1310c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1311c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1312c609719bSwdenk accessed from the boot prompt by mapping the device 1313c609719bSwdenk to physical memory similar to flash. Command line is 1314602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1315602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1316c609719bSwdenk 1317afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1318afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1319afb35666SYoshihiro Shimoda 1320afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1321afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1322afb35666SYoshihiro Shimoda 1323afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1324afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1325afb35666SYoshihiro Shimoda 13266705d81eSwdenk- Journaling Flash filesystem support: 13276705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 13286705d81eSwdenk CONFIG_JFFS2_NAND_DEV 13296705d81eSwdenk Define these for a default partition on a NAND device 13306705d81eSwdenk 13316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 13326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 13336705d81eSwdenk Define these for a default partition on a NOR device 13346705d81eSwdenk 13356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 13366705d81eSwdenk Define this to create an own partition. You have to provide a 13376705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 13386705d81eSwdenk 13396705d81eSwdenk If you define only one JFFS2 partition you may also want to 13406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 13416705d81eSwdenk to disable the command chpart. This is the default when you 13426705d81eSwdenk have not defined a custom partition 13436705d81eSwdenk 1344c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1345c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1346656f4c65SDonggeun Kim 1347656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1348656f4c65SDonggeun Kim file in FAT formatted partition. 1349656f4c65SDonggeun Kim 1350656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1351656f4c65SDonggeun Kim user to write files to FAT. 1352c30a15e5SDonggeun Kim 135384cd9327SGabe BlackCBFS (Coreboot Filesystem) support 135484cd9327SGabe Black CONFIG_CMD_CBFS 135584cd9327SGabe Black 135684cd9327SGabe Black Define this to enable support for reading from a Coreboot 135784cd9327SGabe Black filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls 135884cd9327SGabe Black and cbfsload. 135984cd9327SGabe Black 1360c609719bSwdenk- Keyboard Support: 1361c609719bSwdenk CONFIG_ISA_KEYBOARD 1362c609719bSwdenk 1363c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1364c609719bSwdenk support 1365c609719bSwdenk 1366c609719bSwdenk CONFIG_I8042_KBD 1367c609719bSwdenk Standard PC keyboard driver with US (is default) and 1368c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1369c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1370c609719bSwdenk for cfb_console. Supports cursor blinking. 1371c609719bSwdenk 1372c609719bSwdenk- Video support: 1373c609719bSwdenk CONFIG_VIDEO 1374c609719bSwdenk 1375c609719bSwdenk Define this to enable video support (for output to 1376c609719bSwdenk video). 1377c609719bSwdenk 1378c609719bSwdenk CONFIG_VIDEO_CT69000 1379c609719bSwdenk 1380c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1381c609719bSwdenk 1382c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1383eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1384eeb1b77bSwdenk video output is selected via environment 'videoout' 1385eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1386eeb1b77bSwdenk assumed. 1387c609719bSwdenk 1388eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 138911ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1390eeb1b77bSwdenk are possible: 1391eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1392eeb1b77bSwdenk Following standard modes are supported (* is default): 1393eeb1b77bSwdenk 1394eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1395eeb1b77bSwdenk -------------+--------------------------------------------- 1396eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1397eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1398eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1399eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1400eeb1b77bSwdenk -------------+--------------------------------------------- 1401c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1402c609719bSwdenk 1403eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 14047817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1405eeb1b77bSwdenk 1406eeb1b77bSwdenk 1407a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1408a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1409a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1410a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1411a6c7ad2fSwdenk 14127d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 14137d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 14147d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 14157d3053fbSTimur Tabi support, and should also define these other macros: 14167d3053fbSTimur Tabi 14177d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 14187d3053fbSTimur Tabi CONFIG_VIDEO 14197d3053fbSTimur Tabi CONFIG_CMD_BMP 14207d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 14217d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 14227d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 14237d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 14247d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 14257d3053fbSTimur Tabi 1426ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1427ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1428ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1429ba8e76bdSTimur Tabi description of this variable. 14307d3053fbSTimur Tabi 1431058d59b0SSimon Glass CONFIG_VIDEO_VGA 1432058d59b0SSimon Glass 1433058d59b0SSimon Glass Enable the VGA video / BIOS for x86. The alternative if you 1434058d59b0SSimon Glass are using coreboot is to use the coreboot frame buffer 1435058d59b0SSimon Glass driver. 1436058d59b0SSimon Glass 1437058d59b0SSimon Glass 1438682011ffSwdenk- Keyboard Support: 1439682011ffSwdenk CONFIG_KEYBOARD 1440682011ffSwdenk 1441682011ffSwdenk Define this to enable a custom keyboard support. 1442682011ffSwdenk This simply calls drv_keyboard_init() which must be 1443682011ffSwdenk defined in your board-specific files. 1444682011ffSwdenk The only board using this so far is RBC823. 1445a6c7ad2fSwdenk 1446c609719bSwdenk- LCD Support: CONFIG_LCD 1447c609719bSwdenk 1448c609719bSwdenk Define this to enable LCD support (for output to LCD 1449c609719bSwdenk display); also select one of the supported displays 1450c609719bSwdenk by defining one of these: 1451c609719bSwdenk 145239cf4804SStelian Pop CONFIG_ATMEL_LCD: 145339cf4804SStelian Pop 145439cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 145539cf4804SStelian Pop 1456fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1457c609719bSwdenk 1458fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1459c609719bSwdenk 1460fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1461c609719bSwdenk 1462fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1463fd3103bbSwdenk Active, color, single scan. 1464fd3103bbSwdenk 1465fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1466fd3103bbSwdenk 1467fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1468c609719bSwdenk Active, color, single scan. 1469c609719bSwdenk 1470c609719bSwdenk CONFIG_SHARP_16x9 1471c609719bSwdenk 1472c609719bSwdenk Sharp 320x240. Active, color, single scan. 1473c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1474c609719bSwdenk 1475c609719bSwdenk CONFIG_SHARP_LQ64D341 1476c609719bSwdenk 1477c609719bSwdenk Sharp LQ64D341 display, 640x480. 1478c609719bSwdenk Active, color, single scan. 1479c609719bSwdenk 1480c609719bSwdenk CONFIG_HLD1045 1481c609719bSwdenk 1482c609719bSwdenk HLD1045 display, 640x480. 1483c609719bSwdenk Active, color, single scan. 1484c609719bSwdenk 1485c609719bSwdenk CONFIG_OPTREX_BW 1486c609719bSwdenk 1487c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1488c609719bSwdenk or 1489c609719bSwdenk Hitachi LMG6912RPFC-00T 1490c609719bSwdenk or 1491c609719bSwdenk Hitachi SP14Q002 1492c609719bSwdenk 1493c609719bSwdenk 320x240. Black & white. 1494c609719bSwdenk 1495c609719bSwdenk Normally display is black on white background; define 14966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1497c609719bSwdenk 1498676d319eSSimon Glass CONFIG_LCD_ALIGNMENT 1499676d319eSSimon Glass 1500676d319eSSimon Glass Normally the LCD is page-aligned (tyically 4KB). If this is 1501676d319eSSimon Glass defined then the LCD will be aligned to this value instead. 1502676d319eSSimon Glass For ARM it is sometimes useful to use MMU_SECTION_SIZE 1503676d319eSSimon Glass here, since it is cheaper to change data cache settings on 1504676d319eSSimon Glass a per-section basis. 1505676d319eSSimon Glass 15060d89efefSSimon Glass CONFIG_CONSOLE_SCROLL_LINES 15070d89efefSSimon Glass 15080d89efefSSimon Glass When the console need to be scrolled, this is the number of 15090d89efefSSimon Glass lines to scroll by. It defaults to 1. Increasing this makes 15100d89efefSSimon Glass the console jump but can help speed up operation when scrolling 15110d89efefSSimon Glass is slow. 1512676d319eSSimon Glass 151345d7f525STom Wai-Hong Tam CONFIG_LCD_BMP_RLE8 151445d7f525STom Wai-Hong Tam 151545d7f525STom Wai-Hong Tam Support drawing of RLE8-compressed bitmaps on the LCD. 151645d7f525STom Wai-Hong Tam 1517735987c5STom Wai-Hong Tam CONFIG_I2C_EDID 1518735987c5STom Wai-Hong Tam 1519735987c5STom Wai-Hong Tam Enables an 'i2c edid' command which can read EDID 1520735987c5STom Wai-Hong Tam information over I2C from an attached LCD display. 1521735987c5STom Wai-Hong Tam 15227152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1523d791b1dcSwdenk 1524d791b1dcSwdenk If this option is set, the environment is checked for 1525d791b1dcSwdenk a variable "splashimage". If found, the usual display 1526d791b1dcSwdenk of logo, copyright and system information on the LCD 1527e94d2cd9Swdenk is suppressed and the BMP image at the address 1528d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1529d791b1dcSwdenk console is redirected to the "nulldev", too. This 1530d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1531d791b1dcSwdenk loaded very quickly after power-on. 1532d791b1dcSwdenk 15331ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 15341ca298ceSMatthias Weisser 15351ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 15361ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 15371ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 15381ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 15391ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 15401ca298ceSMatthias Weisser specify 'm' for centering the image. 15411ca298ceSMatthias Weisser 15421ca298ceSMatthias Weisser Example: 15431ca298ceSMatthias Weisser setenv splashpos m,m 15441ca298ceSMatthias Weisser => image at center of screen 15451ca298ceSMatthias Weisser 15461ca298ceSMatthias Weisser setenv splashpos 30,20 15471ca298ceSMatthias Weisser => image at x = 30 and y = 20 15481ca298ceSMatthias Weisser 15491ca298ceSMatthias Weisser setenv splashpos -10,m 15501ca298ceSMatthias Weisser => vertically centered image 15511ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 15521ca298ceSMatthias Weisser 155398f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 155498f4a3dfSStefan Roese 155598f4a3dfSStefan Roese If this option is set, additionally to standard BMP 155698f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 155798f4a3dfSStefan Roese splashscreen support or the bmp command. 155898f4a3dfSStefan Roese 1559d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1560d5011762SAnatolij Gustschin 1561d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1562d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1563d5011762SAnatolij Gustschin bmp command. 1564d5011762SAnatolij Gustschin 1565f2b96dfbSLei Wen- Do compresssing for memory range: 1566f2b96dfbSLei Wen CONFIG_CMD_ZIP 1567f2b96dfbSLei Wen 1568f2b96dfbSLei Wen If this option is set, it would use zlib deflate method 1569f2b96dfbSLei Wen to compress the specified memory at its best effort. 1570f2b96dfbSLei Wen 1571c29fdfc1Swdenk- Compression support: 1572c29fdfc1Swdenk CONFIG_BZIP2 1573c29fdfc1Swdenk 1574c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1575c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1576c29fdfc1Swdenk compressed images are supported. 1577c29fdfc1Swdenk 1578c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 15796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1580c29fdfc1Swdenk be at least 4MB. 1581d791b1dcSwdenk 1582fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1583fc9c1727SLuigi 'Comio' Mantellini 1584fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1585fc9c1727SLuigi 'Comio' Mantellini images is included. 1586fc9c1727SLuigi 'Comio' Mantellini 1587fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1588fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1589fc9c1727SLuigi 'Comio' Mantellini formula: 1590fc9c1727SLuigi 'Comio' Mantellini 1591fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1592fc9c1727SLuigi 'Comio' Mantellini 1593fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1594fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1595fc9c1727SLuigi 'Comio' Mantellini 1596fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1597fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1598fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1599fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1600fc9c1727SLuigi 'Comio' Mantellini 1601fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1602fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 16036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1604fc9c1727SLuigi 'Comio' Mantellini 160517ea1177Swdenk- MII/PHY support: 160617ea1177Swdenk CONFIG_PHY_ADDR 160717ea1177Swdenk 160817ea1177Swdenk The address of PHY on MII bus. 160917ea1177Swdenk 161017ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 161117ea1177Swdenk 161217ea1177Swdenk The clock frequency of the MII bus 161317ea1177Swdenk 161417ea1177Swdenk CONFIG_PHY_GIGE 161517ea1177Swdenk 161617ea1177Swdenk If this option is set, support for speed/duplex 161711ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 161817ea1177Swdenk 161917ea1177Swdenk CONFIG_PHY_RESET_DELAY 162017ea1177Swdenk 162117ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 162217ea1177Swdenk reset before any MII register access is possible. 162317ea1177Swdenk For such PHY, set this option to the usec delay 162417ea1177Swdenk required. (minimum 300usec for LXT971A) 162517ea1177Swdenk 162617ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 162717ea1177Swdenk 162817ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 162917ea1177Swdenk command issued before MII status register can be read 163017ea1177Swdenk 1631c609719bSwdenk- Ethernet address: 1632c609719bSwdenk CONFIG_ETHADDR 1633c68a05feSrichardretanubun CONFIG_ETH1ADDR 1634c609719bSwdenk CONFIG_ETH2ADDR 1635c609719bSwdenk CONFIG_ETH3ADDR 1636c68a05feSrichardretanubun CONFIG_ETH4ADDR 1637c68a05feSrichardretanubun CONFIG_ETH5ADDR 1638c609719bSwdenk 163911ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 164011ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1641c609719bSwdenk is not determined automatically. 1642c609719bSwdenk 1643c609719bSwdenk- IP address: 1644c609719bSwdenk CONFIG_IPADDR 1645c609719bSwdenk 1646c609719bSwdenk Define a default value for the IP address to use for 164711ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1648c609719bSwdenk determined through e.g. bootp. 16491ebcd654SWolfgang Denk (Environment variable "ipaddr") 1650c609719bSwdenk 1651c609719bSwdenk- Server IP address: 1652c609719bSwdenk CONFIG_SERVERIP 1653c609719bSwdenk 1654c609719bSwdenk Defines a default value for the IP address of a TFTP 1655c609719bSwdenk server to contact when using the "tftboot" command. 16561ebcd654SWolfgang Denk (Environment variable "serverip") 1657c609719bSwdenk 165897cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 165997cfe861SRobin Getz 166097cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 166197cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 166297cfe861SRobin Getz 16631ebcd654SWolfgang Denk- Gateway IP address: 16641ebcd654SWolfgang Denk CONFIG_GATEWAYIP 16651ebcd654SWolfgang Denk 16661ebcd654SWolfgang Denk Defines a default value for the IP address of the 16671ebcd654SWolfgang Denk default router where packets to other networks are 16681ebcd654SWolfgang Denk sent to. 16691ebcd654SWolfgang Denk (Environment variable "gatewayip") 16701ebcd654SWolfgang Denk 16711ebcd654SWolfgang Denk- Subnet mask: 16721ebcd654SWolfgang Denk CONFIG_NETMASK 16731ebcd654SWolfgang Denk 16741ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 16751ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 16761ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 16771ebcd654SWolfgang Denk forwarded through a router. 16781ebcd654SWolfgang Denk (Environment variable "netmask") 16791ebcd654SWolfgang Denk 168053a5c424SDavid Updegraff- Multicast TFTP Mode: 168153a5c424SDavid Updegraff CONFIG_MCAST_TFTP 168253a5c424SDavid Updegraff 168353a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 168453a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 168511ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 168653a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 168753a5c424SDavid Updegraff multicast group. 168853a5c424SDavid Updegraff 1689c609719bSwdenk- BOOTP Recovery Mode: 1690c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1691c609719bSwdenk 1692c609719bSwdenk If you have many targets in a network that try to 1693c609719bSwdenk boot using BOOTP, you may want to avoid that all 1694c609719bSwdenk systems send out BOOTP requests at precisely the same 1695c609719bSwdenk moment (which would happen for instance at recovery 1696c609719bSwdenk from a power failure, when all systems will try to 1697c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1698c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1699c609719bSwdenk inserted before sending out BOOTP requests. The 17006c33c785SWolfgang Denk following delays are inserted then: 1701c609719bSwdenk 1702c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1703c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1704c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1705c609719bSwdenk 4th and following 1706c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1707c609719bSwdenk 1708fe389a82Sstroese- DHCP Advanced Options: 17091fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 17101fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1711fe389a82Sstroese 17121fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 17131fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 17141fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 17151fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 17161fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 17171fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 17181fe80d79SJon Loeliger CONFIG_BOOTP_DNS 17191fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 17201fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 17211fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 17221fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 17231fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 17242c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1725fe389a82Sstroese 17265d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 17275d110f0aSWilson Callan environment variable, not the BOOTP server. 1728fe389a82Sstroese 17292c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 17302c00e099SJoe Hershberger after the configured retry count, the call will fail 17312c00e099SJoe Hershberger instead of starting over. This can be used to fail over 17322c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 17332c00e099SJoe Hershberger is not available. 17342c00e099SJoe Hershberger 1735fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1736fe389a82Sstroese serverip from a DHCP server, it is possible that more 1737fe389a82Sstroese than one DNS serverip is offered to the client. 1738fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1739fe389a82Sstroese serverip will be stored in the additional environment 1740fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1741fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 17421fe80d79SJon Loeliger is defined. 1743fe389a82Sstroese 1744fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1745fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1746fe389a82Sstroese need the hostname of the DHCP requester. 17475d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 17481fe80d79SJon Loeliger of the "hostname" environment variable is passed as 17491fe80d79SJon Loeliger option 12 to the DHCP server. 1750fe389a82Sstroese 1751d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1752d9a2f416SAras Vaichas 1753d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1754d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1755d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1756d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1757d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1758d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1759d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1760d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1761d9a2f416SAras Vaichas that one of the retries will be successful but note that 1762d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1763d9a2f416SAras Vaichas this delay. 1764d9a2f416SAras Vaichas 1765d22c338eSJoe Hershberger - Link-local IP address negotiation: 1766d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1767d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1768d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1769d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1770d22c338eSJoe Hershberger 1771d22c338eSJoe Hershberger See doc/README.link-local for more information. 1772d22c338eSJoe Hershberger 1773a3d991bdSwdenk - CDP Options: 1774a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1775a3d991bdSwdenk 1776a3d991bdSwdenk The device id used in CDP trigger frames. 1777a3d991bdSwdenk 1778a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1779a3d991bdSwdenk 1780a3d991bdSwdenk A two character string which is prefixed to the MAC address 1781a3d991bdSwdenk of the device. 1782a3d991bdSwdenk 1783a3d991bdSwdenk CONFIG_CDP_PORT_ID 1784a3d991bdSwdenk 1785a3d991bdSwdenk A printf format string which contains the ascii name of 1786a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 178711ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1788a3d991bdSwdenk 1789a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1790a3d991bdSwdenk 1791a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1792a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1793a3d991bdSwdenk 1794a3d991bdSwdenk CONFIG_CDP_VERSION 1795a3d991bdSwdenk 1796a3d991bdSwdenk An ascii string containing the version of the software. 1797a3d991bdSwdenk 1798a3d991bdSwdenk CONFIG_CDP_PLATFORM 1799a3d991bdSwdenk 1800a3d991bdSwdenk An ascii string containing the name of the platform. 1801a3d991bdSwdenk 1802a3d991bdSwdenk CONFIG_CDP_TRIGGER 1803a3d991bdSwdenk 1804a3d991bdSwdenk A 32bit integer sent on the trigger. 1805a3d991bdSwdenk 1806a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1807a3d991bdSwdenk 1808a3d991bdSwdenk A 16bit integer containing the power consumption of the 1809a3d991bdSwdenk device in .1 of milliwatts. 1810a3d991bdSwdenk 1811a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1812a3d991bdSwdenk 1813a3d991bdSwdenk A byte containing the id of the VLAN. 1814a3d991bdSwdenk 1815c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1816c609719bSwdenk 1817c609719bSwdenk Several configurations allow to display the current 1818c609719bSwdenk status using a LED. For instance, the LED will blink 1819c609719bSwdenk fast while running U-Boot code, stop blinking as 1820c609719bSwdenk soon as a reply to a BOOTP request was received, and 1821c609719bSwdenk start blinking slow once the Linux kernel is running 1822c609719bSwdenk (supported by a status LED driver in the Linux 1823c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1824c609719bSwdenk feature in U-Boot. 1825c609719bSwdenk 1826c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1827c609719bSwdenk 1828c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1829c609719bSwdenk on those systems that support this (optional) 1830c609719bSwdenk feature, like the TQM8xxL modules. 1831c609719bSwdenk 1832c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1833c609719bSwdenk 1834b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1835b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 183611ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1837c609719bSwdenk 1838b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1839602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1840b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1841b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1842c609719bSwdenk command line interface. 1843c609719bSwdenk 1844bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1845c609719bSwdenk 1846b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1847b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1848b37c7e5eSwdenk support for I2C. 1849c609719bSwdenk 1850b37c7e5eSwdenk There are several other quantities that must also be 1851b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1852c609719bSwdenk 18536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1854b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 18556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 185611ccc33fSMarcel Ziswiler the CPU's i2c node address). 1857c609719bSwdenk 18588d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1859a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 18608d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 18618d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 18628d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1863b37c7e5eSwdenk 18645da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 18655da71efaSEric Millbrandt 18665da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 18675da71efaSEric Millbrandt chips might think that the current transfer is still 18685da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 18695da71efaSEric Millbrandt commands until the slave device responds. 18705da71efaSEric Millbrandt 1871b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1872b37c7e5eSwdenk 1873b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1874b37c7e5eSwdenk then the following macros need to be defined (examples are 1875b37c7e5eSwdenk from include/configs/lwmon.h): 1876c609719bSwdenk 1877c609719bSwdenk I2C_INIT 1878c609719bSwdenk 1879b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1880c609719bSwdenk controller or configure ports. 1881c609719bSwdenk 1882b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1883b37c7e5eSwdenk 1884c609719bSwdenk I2C_PORT 1885c609719bSwdenk 1886c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1887c609719bSwdenk assumes both bits are on the same port). Valid values 1888c609719bSwdenk are 0..3 for ports A..D. 1889c609719bSwdenk 1890c609719bSwdenk I2C_ACTIVE 1891c609719bSwdenk 1892c609719bSwdenk The code necessary to make the I2C data line active 1893c609719bSwdenk (driven). If the data line is open collector, this 1894c609719bSwdenk define can be null. 1895c609719bSwdenk 1896b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1897b37c7e5eSwdenk 1898c609719bSwdenk I2C_TRISTATE 1899c609719bSwdenk 1900c609719bSwdenk The code necessary to make the I2C data line tri-stated 1901c609719bSwdenk (inactive). If the data line is open collector, this 1902c609719bSwdenk define can be null. 1903c609719bSwdenk 1904b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1905b37c7e5eSwdenk 1906c609719bSwdenk I2C_READ 1907c609719bSwdenk 1908c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1909c609719bSwdenk FALSE if it is low. 1910c609719bSwdenk 1911b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1912b37c7e5eSwdenk 1913c609719bSwdenk I2C_SDA(bit) 1914c609719bSwdenk 1915c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1916c609719bSwdenk is FALSE, it clears it (low). 1917c609719bSwdenk 1918b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1919b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1920b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1921b37c7e5eSwdenk 1922c609719bSwdenk I2C_SCL(bit) 1923c609719bSwdenk 1924c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1925c609719bSwdenk is FALSE, it clears it (low). 1926c609719bSwdenk 1927b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1928b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1929b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1930b37c7e5eSwdenk 1931c609719bSwdenk I2C_DELAY 1932c609719bSwdenk 1933c609719bSwdenk This delay is invoked four times per clock cycle so this 1934c609719bSwdenk controls the rate of data transfer. The data rate thus 1935b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1936b37c7e5eSwdenk like: 1937b37c7e5eSwdenk 1938b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1939c609719bSwdenk 1940793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1941793b5726SMike Frysinger 1942793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1943793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1944793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1945793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1946793b5726SMike Frysinger 1947793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1948793b5726SMike Frysinger the generic GPIO functions. 1949793b5726SMike Frysinger 19506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 195147cd00faSwdenk 195247cd00faSwdenk When a board is reset during an i2c bus transfer 195347cd00faSwdenk chips might think that the current transfer is still 195447cd00faSwdenk in progress. On some boards it is possible to access 195547cd00faSwdenk the i2c SCLK line directly, either by using the 195647cd00faSwdenk processor pin as a GPIO or by having a second pin 195747cd00faSwdenk connected to the bus. If this option is defined a 195847cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 195947cd00faSwdenk is run early in the boot sequence. 196047cd00faSwdenk 196126a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 196226a33504SRichard Retanubun 196326a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 196426a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 196526a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 196626a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 196726a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 196826a33504SRichard Retanubun controller provide such a method. It is called at the end of 196926a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 197026a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 197126a33504SRichard Retanubun 197217ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 197317ea1177Swdenk 197417ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 197517ea1177Swdenk in u-boot bd_info structure based on u-boot environment 197617ea1177Swdenk variable "i2cfast". (see also i2cfast) 197717ea1177Swdenk 1978bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1979bb99ad6dSBen Warren 1980bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1981bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1982bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1983bb99ad6dSBen Warren Note that bus numbering is zero-based. 1984bb99ad6dSBen Warren 19856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1986bb99ad6dSBen Warren 1987bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 19880f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 19890f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 19900f89c54bSPeter Tyser a 1D array of device addresses 1991bb99ad6dSBen Warren 1992bb99ad6dSBen Warren e.g. 1993bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 19946d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1995bb99ad6dSBen Warren 1996bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1997bb99ad6dSBen Warren 1998bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 19996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 2000bb99ad6dSBen Warren 2001bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 2002bb99ad6dSBen Warren 20036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 2004be5e6181STimur Tabi 2005be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 2006be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 2007be5e6181STimur Tabi 20086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 20090dc018ecSStefan Roese 20100dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 20110dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 20120dc018ecSStefan Roese 20136d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 20140dc018ecSStefan Roese 20150dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 20160dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 20170dc018ecSStefan Roese 20186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 20199ebbb54fSVictor Gallardo 20209ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 20219ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 20229ebbb54fSVictor Gallardo specified DTT device. 20239ebbb54fSVictor Gallardo 2024be5e6181STimur Tabi CONFIG_FSL_I2C 2025be5e6181STimur Tabi 2026be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 20277817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 2028be5e6181STimur Tabi 202967b23a32SHeiko Schocher CONFIG_I2C_MUX 203067b23a32SHeiko Schocher 203167b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 203267b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 203367b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 203467b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 203567b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 203667b23a32SHeiko Schocher the muxes to activate this new "bus". 203767b23a32SHeiko Schocher 203867b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 203967b23a32SHeiko Schocher feature! 204067b23a32SHeiko Schocher 204167b23a32SHeiko Schocher Example: 204267b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 204367b23a32SHeiko Schocher The First mux with address 70 and channel 6 204467b23a32SHeiko Schocher The Second mux with address 71 and channel 4 204567b23a32SHeiko Schocher 204667b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 204767b23a32SHeiko Schocher 204867b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 204967b23a32SHeiko Schocher of I2C Busses with muxes: 205067b23a32SHeiko Schocher 205167b23a32SHeiko Schocher => i2c bus 205267b23a32SHeiko Schocher Busses reached over muxes: 205367b23a32SHeiko Schocher Bus ID: 2 205467b23a32SHeiko Schocher reached over Mux(es): 205567b23a32SHeiko Schocher pca9544a@70 ch: 4 205667b23a32SHeiko Schocher Bus ID: 3 205767b23a32SHeiko Schocher reached over Mux(es): 205867b23a32SHeiko Schocher pca9544a@70 ch: 6 205967b23a32SHeiko Schocher pca9544a@71 ch: 4 206067b23a32SHeiko Schocher => 206167b23a32SHeiko Schocher 206267b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 2063f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 2064f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 206567b23a32SHeiko Schocher the channel 4. 206667b23a32SHeiko Schocher 206767b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 2068f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 206967b23a32SHeiko Schocher the 2 muxes. 207067b23a32SHeiko Schocher 207167b23a32SHeiko Schocher This option is actually implemented for the bitbanging 207267b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 207367b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 207467b23a32SHeiko Schocher to add this option to other architectures. 207567b23a32SHeiko Schocher 20762ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 20772ac6985aSAndrew Dyer 20782ac6985aSAndrew Dyer defining this will force the i2c_read() function in 20792ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 20802ac6985aSAndrew Dyer between writing the address pointer and reading the 20812ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 20822ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 20832ac6985aSAndrew Dyer devices can use either method, but some require one or 20842ac6985aSAndrew Dyer the other. 2085be5e6181STimur Tabi 2086c609719bSwdenk- SPI Support: CONFIG_SPI 2087c609719bSwdenk 2088c609719bSwdenk Enables SPI driver (so far only tested with 2089c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 2090c609719bSwdenk D/As on the SACSng board) 2091c609719bSwdenk 20926639562eSYoshihiro Shimoda CONFIG_SH_SPI 20936639562eSYoshihiro Shimoda 20946639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 20956639562eSYoshihiro Shimoda only SH7757 is supported. 20966639562eSYoshihiro Shimoda 2097c609719bSwdenk CONFIG_SPI_X 2098c609719bSwdenk 2099c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 2100c609719bSwdenk (symmetrical to CONFIG_I2C_X) 2101c609719bSwdenk 2102c609719bSwdenk CONFIG_SOFT_SPI 2103c609719bSwdenk 2104c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 2105c609719bSwdenk using hardware support. This is a general purpose 2106c609719bSwdenk driver that only requires three general I/O port pins 2107c609719bSwdenk (two outputs, one input) to function. If this is 2108c609719bSwdenk defined, the board configuration must define several 2109c609719bSwdenk SPI configuration items (port pins to use, etc). For 2110c609719bSwdenk an example, see include/configs/sacsng.h. 2111c609719bSwdenk 211204a9e118SBen Warren CONFIG_HARD_SPI 211304a9e118SBen Warren 211404a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 211504a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 211604a9e118SBen Warren must define a list of chip-select function pointers. 211704a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 211804a9e118SBen Warren example, see include/configs/mpc8349emds.h. 211904a9e118SBen Warren 212038254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 212138254f45SGuennadi Liakhovetski 212238254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 21232e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 212438254f45SGuennadi Liakhovetski 21250133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 21260133502eSMatthias Fuchs 21270133502eSMatthias Fuchs Enables FPGA subsystem. 21280133502eSMatthias Fuchs 21290133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 21300133502eSMatthias Fuchs 21310133502eSMatthias Fuchs Enables support for specific chip vendors. 21320133502eSMatthias Fuchs (ALTERA, XILINX) 21330133502eSMatthias Fuchs 21340133502eSMatthias Fuchs CONFIG_FPGA_<family> 21350133502eSMatthias Fuchs 21360133502eSMatthias Fuchs Enables support for FPGA family. 21370133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 21380133502eSMatthias Fuchs 21390133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2140c609719bSwdenk 2141c609719bSwdenk Specify the number of FPGA devices to support. 2142c609719bSwdenk 21436d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2144c609719bSwdenk 2145c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2146c609719bSwdenk 21476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2148c609719bSwdenk 2149c609719bSwdenk Enable checks on FPGA configuration interface busy 2150c609719bSwdenk status by the configuration function. This option 2151c609719bSwdenk will require a board or device specific function to 2152c609719bSwdenk be written. 2153c609719bSwdenk 2154c609719bSwdenk CONFIG_FPGA_DELAY 2155c609719bSwdenk 2156c609719bSwdenk If defined, a function that provides delays in the FPGA 2157c609719bSwdenk configuration driver. 2158c609719bSwdenk 21596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2160c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2161c609719bSwdenk 21626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2163c609719bSwdenk 2164c609719bSwdenk Check for configuration errors during FPGA bitfile 2165c609719bSwdenk loading. For example, abort during Virtex II 2166c609719bSwdenk configuration if the INIT_B line goes low (which 2167c609719bSwdenk indicated a CRC error). 2168c609719bSwdenk 21696d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2170c609719bSwdenk 2171c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2172c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2173c609719bSwdenk FPGA configuration sequence. The default time is 500 217411ccc33fSMarcel Ziswiler ms. 2175c609719bSwdenk 21766d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2177c609719bSwdenk 2178c609719bSwdenk Maximum time to wait for BUSY to deassert during 217911ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2180c609719bSwdenk 21816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2182c609719bSwdenk 2183c609719bSwdenk Time to wait after FPGA configuration. The default is 218411ccc33fSMarcel Ziswiler 200 ms. 2185c609719bSwdenk 2186c609719bSwdenk- Configuration Management: 2187c609719bSwdenk CONFIG_IDENT_STRING 2188c609719bSwdenk 2189c609719bSwdenk If defined, this string will be added to the U-Boot 2190c609719bSwdenk version information (U_BOOT_VERSION) 2191c609719bSwdenk 2192c609719bSwdenk- Vendor Parameter Protection: 2193c609719bSwdenk 2194c609719bSwdenk U-Boot considers the values of the environment 2195c609719bSwdenk variables "serial#" (Board Serial Number) and 21967152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2197c609719bSwdenk are set once by the board vendor / manufacturer, and 2198c609719bSwdenk protects these variables from casual modification by 2199c609719bSwdenk the user. Once set, these variables are read-only, 2200c609719bSwdenk and write or delete attempts are rejected. You can 220111ccc33fSMarcel Ziswiler change this behaviour: 2202c609719bSwdenk 2203c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2204c609719bSwdenk file, the write protection for vendor parameters is 220547cd00faSwdenk completely disabled. Anybody can change or delete 2206c609719bSwdenk these parameters. 2207c609719bSwdenk 2208c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2209c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 221011ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2211c609719bSwdenk which can be changed exactly ONCE by the user. [The 2212c609719bSwdenk serial# is unaffected by this, i. e. it remains 2213c609719bSwdenk read-only.] 2214c609719bSwdenk 22152598090bSJoe Hershberger The same can be accomplished in a more flexible way 22162598090bSJoe Hershberger for any variable by configuring the type of access 22172598090bSJoe Hershberger to allow for those variables in the ".flags" variable 22182598090bSJoe Hershberger or define CONFIG_ENV_FLAGS_LIST_STATIC. 22192598090bSJoe Hershberger 2220c609719bSwdenk- Protected RAM: 2221c609719bSwdenk CONFIG_PRAM 2222c609719bSwdenk 2223c609719bSwdenk Define this variable to enable the reservation of 2224c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2225c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2226c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2227c609719bSwdenk this default value by defining an environment 2228c609719bSwdenk variable "pram" to the number of kB you want to 2229c609719bSwdenk reserve. Note that the board info structure will 2230c609719bSwdenk still show the full amount of RAM. If pRAM is 2231c609719bSwdenk reserved, a new environment variable "mem" will 2232c609719bSwdenk automatically be defined to hold the amount of 2233c609719bSwdenk remaining RAM in a form that can be passed as boot 2234c609719bSwdenk argument to Linux, for instance like that: 2235c609719bSwdenk 2236fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2237c609719bSwdenk saveenv 2238c609719bSwdenk 2239c609719bSwdenk This way you can tell Linux not to use this memory, 2240c609719bSwdenk either, which results in a memory region that will 2241c609719bSwdenk not be affected by reboots. 2242c609719bSwdenk 2243c609719bSwdenk *WARNING* If your board configuration uses automatic 2244c609719bSwdenk detection of the RAM size, you must make sure that 2245c609719bSwdenk this memory test is non-destructive. So far, the 2246c609719bSwdenk following board configurations are known to be 2247c609719bSwdenk "pRAM-clean": 2248c609719bSwdenk 22491b0757ecSWolfgang Denk IVMS8, IVML24, SPD8xx, TQM8xxL, 22501b0757ecSWolfgang Denk HERMES, IP860, RPXlite, LWMON, 2251544d97e9SWolfgang Denk FLAGADM, TQM8260 2252c609719bSwdenk 225340fef049SGabe Black- Access to physical memory region (> 4GB) 225440fef049SGabe Black Some basic support is provided for operations on memory not 225540fef049SGabe Black normally accessible to U-Boot - e.g. some architectures 225640fef049SGabe Black support access to more than 4GB of memory on 32-bit 225740fef049SGabe Black machines using physical address extension or similar. 225840fef049SGabe Black Define CONFIG_PHYSMEM to access this basic support, which 225940fef049SGabe Black currently only supports clearing the memory. 226040fef049SGabe Black 2261c609719bSwdenk- Error Recovery: 2262c609719bSwdenk CONFIG_PANIC_HANG 2263c609719bSwdenk 2264c609719bSwdenk Define this variable to stop the system in case of a 2265c609719bSwdenk fatal error, so that you have to reset it manually. 2266c609719bSwdenk This is probably NOT a good idea for an embedded 226711ccc33fSMarcel Ziswiler system where you want the system to reboot 2268c609719bSwdenk automatically as fast as possible, but it may be 2269c609719bSwdenk useful during development since you can try to debug 2270c609719bSwdenk the conditions that lead to the situation. 2271c609719bSwdenk 2272c609719bSwdenk CONFIG_NET_RETRY_COUNT 2273c609719bSwdenk 2274c609719bSwdenk This variable defines the number of retries for 2275c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2276c609719bSwdenk before giving up the operation. If not defined, a 2277c609719bSwdenk default value of 5 is used. 2278c609719bSwdenk 227940cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 228040cb90eeSGuennadi Liakhovetski 228140cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 228240cb90eeSGuennadi Liakhovetski 228348a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 228448a3e999STetsuyuki Kobayashi 228548a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 228648a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 228748a3e999STetsuyuki Kobayashi try longer timeout such as 228848a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 228948a3e999STetsuyuki Kobayashi 2290c609719bSwdenk- Command Interpreter: 22918078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 229204a85b3bSwdenk 229304a85b3bSwdenk Enable auto completion of commands using TAB. 229404a85b3bSwdenk 22958078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 22968078f1a5SWolfgang Denk for the "hush" shell. 22978078f1a5SWolfgang Denk 22988078f1a5SWolfgang Denk 22996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2300c609719bSwdenk 2301c609719bSwdenk Define this variable to enable the "hush" shell (from 2302c609719bSwdenk Busybox) as command line interpreter, thus enabling 2303c609719bSwdenk powerful command line syntax like 2304c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2305c609719bSwdenk constructs ("shell scripts"). 2306c609719bSwdenk 2307c609719bSwdenk If undefined, you get the old, much simpler behaviour 2308c609719bSwdenk with a somewhat smaller memory footprint. 2309c609719bSwdenk 2310c609719bSwdenk 23116d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2312c609719bSwdenk 2313c609719bSwdenk This defines the secondary prompt string, which is 2314c609719bSwdenk printed when the command interpreter needs more input 2315c609719bSwdenk to complete a command. Usually "> ". 2316c609719bSwdenk 2317c609719bSwdenk Note: 2318c609719bSwdenk 2319c609719bSwdenk In the current implementation, the local variables 2320c609719bSwdenk space and global environment variables space are 2321c609719bSwdenk separated. Local variables are those you define by 23223b57fe0aSwdenk simply typing `name=value'. To access a local 2323c609719bSwdenk variable later on, you have write `$name' or 23243b57fe0aSwdenk `${name}'; to execute the contents of a variable 23253b57fe0aSwdenk directly type `$name' at the command prompt. 2326c609719bSwdenk 2327c609719bSwdenk Global environment variables are those you use 2328c609719bSwdenk setenv/printenv to work with. To run a command stored 2329c609719bSwdenk in such a variable, you need to use the run command, 2330c609719bSwdenk and you must not use the '$' sign to access them. 2331c609719bSwdenk 2332c609719bSwdenk To store commands and special characters in a 2333c609719bSwdenk variable, please use double quotation marks 2334c609719bSwdenk surrounding the whole text of the variable, instead 2335c609719bSwdenk of the backslashes before semicolons and special 2336c609719bSwdenk symbols. 2337c609719bSwdenk 2338aa0c71acSWolfgang Denk- Commandline Editing and History: 2339aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2340aa0c71acSWolfgang Denk 234111ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2342aa0c71acSWolfgang Denk commandline input operations 2343aa0c71acSWolfgang Denk 2344a8c7c708Swdenk- Default Environment: 2345c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2346c609719bSwdenk 2347c609719bSwdenk Define this to contain any number of null terminated 2348c609719bSwdenk strings (variable = value pairs) that will be part of 23497152b1d0Swdenk the default environment compiled into the boot image. 23502262cfeeSwdenk 2351c609719bSwdenk For example, place something like this in your 2352c609719bSwdenk board's config file: 2353c609719bSwdenk 2354c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2355c609719bSwdenk "myvar1=value1\0" \ 2356c609719bSwdenk "myvar2=value2\0" 2357c609719bSwdenk 2358c609719bSwdenk Warning: This method is based on knowledge about the 2359c609719bSwdenk internal format how the environment is stored by the 23602262cfeeSwdenk U-Boot code. This is NOT an official, exported 2361c609719bSwdenk interface! Although it is unlikely that this format 23627152b1d0Swdenk will change soon, there is no guarantee either. 2363c609719bSwdenk You better know what you are doing here. 2364c609719bSwdenk 2365c609719bSwdenk Note: overly (ab)use of the default environment is 2366c609719bSwdenk discouraged. Make sure to check other ways to preset 236774de7aefSWolfgang Denk the environment like the "source" command or the 2368c609719bSwdenk boot command first. 2369c609719bSwdenk 23705e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 23715e724ca2SStephen Warren 23725e724ca2SStephen Warren Define this in order to add variables describing the 23735e724ca2SStephen Warren U-Boot build configuration to the default environment. 23745e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 23755e724ca2SStephen Warren 23765e724ca2SStephen Warren Enabling this option will cause the following to be defined: 23775e724ca2SStephen Warren 23785e724ca2SStephen Warren - CONFIG_SYS_ARCH 23795e724ca2SStephen Warren - CONFIG_SYS_CPU 23805e724ca2SStephen Warren - CONFIG_SYS_BOARD 23815e724ca2SStephen Warren - CONFIG_SYS_VENDOR 23825e724ca2SStephen Warren - CONFIG_SYS_SOC 23835e724ca2SStephen Warren 23847e27f89fSTom Rini CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 23857e27f89fSTom Rini 23867e27f89fSTom Rini Define this in order to add variables describing certain 23877e27f89fSTom Rini run-time determined information about the hardware to the 23887e27f89fSTom Rini environment. These will be named board_name, board_rev. 23897e27f89fSTom Rini 239006fd8538SSimon Glass CONFIG_DELAY_ENVIRONMENT 239106fd8538SSimon Glass 239206fd8538SSimon Glass Normally the environment is loaded when the board is 239306fd8538SSimon Glass intialised so that it is available to U-Boot. This inhibits 239406fd8538SSimon Glass that so that the environment is not available until 239506fd8538SSimon Glass explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL 239606fd8538SSimon Glass this is instead controlled by the value of 239706fd8538SSimon Glass /config/load-environment. 239806fd8538SSimon Glass 2399a8c7c708Swdenk- DataFlash Support: 24002abbe075Swdenk CONFIG_HAS_DATAFLASH 24012abbe075Swdenk 24022abbe075Swdenk Defining this option enables DataFlash features and 24032abbe075Swdenk allows to read/write in Dataflash via the standard 24042abbe075Swdenk commands cp, md... 24052abbe075Swdenk 2406f61ec45eSEric Nelson- Serial Flash support 2407f61ec45eSEric Nelson CONFIG_CMD_SF 2408f61ec45eSEric Nelson 2409f61ec45eSEric Nelson Defining this option enables SPI flash commands 2410f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2411f61ec45eSEric Nelson 2412f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2413f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2414f61ec45eSEric Nelson commands. 2415f61ec45eSEric Nelson 2416f61ec45eSEric Nelson The following defaults may be provided by the platform 2417f61ec45eSEric Nelson to handle the common case when only a single serial 2418f61ec45eSEric Nelson flash is present on the system. 2419f61ec45eSEric Nelson 2420f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2421f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2422f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2423f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2424f61ec45eSEric Nelson 242524007273SSimon Glass CONFIG_CMD_SF_TEST 242624007273SSimon Glass 242724007273SSimon Glass Define this option to include a destructive SPI flash 242824007273SSimon Glass test ('sf test'). 242924007273SSimon Glass 24303f85ce27Swdenk- SystemACE Support: 24313f85ce27Swdenk CONFIG_SYSTEMACE 24323f85ce27Swdenk 24333f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 24343f85ce27Swdenk chips attached via some sort of local bus. The address 243511ccc33fSMarcel Ziswiler of the chip must also be defined in the 24366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 24373f85ce27Swdenk 24383f85ce27Swdenk #define CONFIG_SYSTEMACE 24396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 24403f85ce27Swdenk 24413f85ce27Swdenk When SystemACE support is added, the "ace" device type 24423f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 24433f85ce27Swdenk 2444ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2445ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2446ecb0ccd9SWolfgang Denk 244728cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2448ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 244928cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2450ecb0ccd9SWolfgang Denk number generator is used. 2451ecb0ccd9SWolfgang Denk 245228cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 245328cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 245428cb9375SWolfgang Denk defined, the normal port 69 is used. 245528cb9375SWolfgang Denk 245628cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2457ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2458ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2459ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2460ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2461ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2462ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2463ecb0ccd9SWolfgang Denk 2464bf36c5d5SSimon Glass- Hashing support: 2465bf36c5d5SSimon Glass CONFIG_CMD_HASH 2466bf36c5d5SSimon Glass 2467bf36c5d5SSimon Glass This enables a generic 'hash' command which can produce 2468bf36c5d5SSimon Glass hashes / digests from a few algorithms (e.g. SHA1, SHA256). 2469bf36c5d5SSimon Glass 2470bf36c5d5SSimon Glass CONFIG_HASH_VERIFY 2471bf36c5d5SSimon Glass 2472bf36c5d5SSimon Glass Enable the hash verify command (hash -v). This adds to code 2473bf36c5d5SSimon Glass size a little. 2474bf36c5d5SSimon Glass 2475bf36c5d5SSimon Glass CONFIG_SHA1 - support SHA1 hashing 2476bf36c5d5SSimon Glass CONFIG_SHA256 - support SHA256 hashing 2477bf36c5d5SSimon Glass 2478bf36c5d5SSimon Glass Note: There is also a sha1sum command, which should perhaps 2479bf36c5d5SSimon Glass be deprecated in favour of 'hash sha1'. 2480bf36c5d5SSimon Glass 2481a8c7c708Swdenk- Show boot progress: 2482c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2483c609719bSwdenk 2484c609719bSwdenk Defining this option allows to add some board- 2485c609719bSwdenk specific code (calling a user-provided function 2486c609719bSwdenk "show_boot_progress(int)") that enables you to show 2487c609719bSwdenk the system's boot progress on some display (for 2488c609719bSwdenk example, some LED's) on your board. At the moment, 2489c609719bSwdenk the following checkpoints are implemented: 2490c609719bSwdenk 24913a608ca0SSimon Glass- Detailed boot stage timing 24923a608ca0SSimon Glass CONFIG_BOOTSTAGE 24933a608ca0SSimon Glass Define this option to get detailed timing of each stage 24943a608ca0SSimon Glass of the boot process. 24953a608ca0SSimon Glass 24963a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 24973a608ca0SSimon Glass This is the number of available user bootstage records. 24983a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 24993a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 25003a608ca0SSimon Glass the limit, recording will stop. 25013a608ca0SSimon Glass 25023a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 25033a608ca0SSimon Glass Define this to print a report before boot, similar to this: 25043a608ca0SSimon Glass 25053a608ca0SSimon Glass Timer summary in microseconds: 25063a608ca0SSimon Glass Mark Elapsed Stage 25073a608ca0SSimon Glass 0 0 reset 25083a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 25093a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 25103a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 25113a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 25123a608ca0SSimon Glass 3,910,375 250,777 main_loop 25133a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 25143a608ca0SSimon Glass 30,361,327 445,160 start_kernel 25153a608ca0SSimon Glass 25162eba38cfSSimon Glass CONFIG_CMD_BOOTSTAGE 25172eba38cfSSimon Glass Add a 'bootstage' command which supports printing a report 25182eba38cfSSimon Glass and un/stashing of bootstage data. 25192eba38cfSSimon Glass 252094fd1316SSimon Glass CONFIG_BOOTSTAGE_FDT 252194fd1316SSimon Glass Stash the bootstage information in the FDT. A root 'bootstage' 252294fd1316SSimon Glass node is created with each bootstage id as a child. Each child 252394fd1316SSimon Glass has a 'name' property and either 'mark' containing the 252494fd1316SSimon Glass mark time in microsecond, or 'accum' containing the 252594fd1316SSimon Glass accumulated time for that bootstage id in microseconds. 252694fd1316SSimon Glass For example: 252794fd1316SSimon Glass 252894fd1316SSimon Glass bootstage { 252994fd1316SSimon Glass 154 { 253094fd1316SSimon Glass name = "board_init_f"; 253194fd1316SSimon Glass mark = <3575678>; 253294fd1316SSimon Glass }; 253394fd1316SSimon Glass 170 { 253494fd1316SSimon Glass name = "lcd"; 253594fd1316SSimon Glass accum = <33482>; 253694fd1316SSimon Glass }; 253794fd1316SSimon Glass }; 253894fd1316SSimon Glass 253994fd1316SSimon Glass Code in the Linux kernel can find this in /proc/devicetree. 254094fd1316SSimon Glass 25411372cce2SMarian BalakowiczLegacy uImage format: 25421372cce2SMarian Balakowicz 2543c609719bSwdenk Arg Where When 2544c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2545c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2546c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2547c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2548c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2549c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2550c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2551c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2552c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 25531372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2554c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2555c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2556c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2557c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 25581372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2559c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 25601372cce2SMarian Balakowicz 25611372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 25621372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 25631372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 25641372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 25651372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 25661372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 25671372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 256811ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 25691372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 25701372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 25711372cce2SMarian Balakowicz 2572ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2573c609719bSwdenk 2574a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 257563e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 257663e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 257763e73c9aSwdenk 2578566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2579566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2580566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2581566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2582566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2583566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2584566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2585566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2586566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2587566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2588566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2589566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2590566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2591566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2592566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2593566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2594566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2595566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2596566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2597566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2598566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2599566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2600566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2601566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2602566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2603566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2604566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2605566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2606566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2607566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2608566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2609566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2610566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2611566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2612566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2613566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2614566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2615566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2616566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2617566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2618566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2619566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2620566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2621566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2622566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2623566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2624566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2625c609719bSwdenk 2626566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2627c609719bSwdenk 2628566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2629566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2630566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2631206c60cbSwdenk 2632566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2633566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 263411ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2635566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2636566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2637566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 263874de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 263974de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2640566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2641c609719bSwdenk 26421372cce2SMarian BalakowiczFIT uImage format: 26431372cce2SMarian Balakowicz 26441372cce2SMarian Balakowicz Arg Where When 26451372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 26461372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 26471372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 26481372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 26491372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 26501372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2651f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 26521372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 26531372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 26541372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 26551372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 26561372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 265711ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 265811ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 26591372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 26601372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 26611372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 26621372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 26631372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 26641372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 26651372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 26661372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 26671372cce2SMarian Balakowicz 26681372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 26691372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 26701372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 267111ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 26721372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 26731372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 26741372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 26751372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 26761372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 26771372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 26781372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 26791372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 26801372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 26811372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 26821372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 26831372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 26841372cce2SMarian Balakowicz 268511ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 26861372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 26871372cce2SMarian Balakowicz 268811ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 26891372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 26901372cce2SMarian Balakowicz 269111ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 26921372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 26931372cce2SMarian Balakowicz 2694d95f6ec7SGabe Black- FIT image support: 2695d95f6ec7SGabe Black CONFIG_FIT 2696d95f6ec7SGabe Black Enable support for the FIT uImage format. 2697d95f6ec7SGabe Black 2698d95f6ec7SGabe Black CONFIG_FIT_BEST_MATCH 2699d95f6ec7SGabe Black When no configuration is explicitly selected, default to the 2700d95f6ec7SGabe Black one whose fdt's compatibility field best matches that of 2701d95f6ec7SGabe Black U-Boot itself. A match is considered "best" if it matches the 2702d95f6ec7SGabe Black most specific compatibility entry of U-Boot's fdt's root node. 2703d95f6ec7SGabe Black The order of entries in the configuration's fdt is ignored. 2704d95f6ec7SGabe Black 27054cf2609bSWolfgang Denk- Standalone program support: 27064cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 27074cf2609bSWolfgang Denk 27086feff899SWolfgang Denk This option defines a board specific value for the 27096feff899SWolfgang Denk address where standalone program gets loaded, thus 27106feff899SWolfgang Denk overwriting the architecture dependent default 27114cf2609bSWolfgang Denk settings. 27124cf2609bSWolfgang Denk 27134cf2609bSWolfgang Denk- Frame Buffer Address: 27144cf2609bSWolfgang Denk CONFIG_FB_ADDR 27154cf2609bSWolfgang Denk 27164cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 271744a53b57SWolfgang Denk address for frame buffer. This is typically the case 271844a53b57SWolfgang Denk when using a graphics controller has separate video 271944a53b57SWolfgang Denk memory. U-Boot will then place the frame buffer at 272044a53b57SWolfgang Denk the given address instead of dynamically reserving it 272144a53b57SWolfgang Denk in system RAM by calling lcd_setmem(), which grabs 272244a53b57SWolfgang Denk the memory for the frame buffer depending on the 272344a53b57SWolfgang Denk configured panel size. 27244cf2609bSWolfgang Denk 27254cf2609bSWolfgang Denk Please see board_init_f function. 27264cf2609bSWolfgang Denk 2727cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2728cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2729cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2730cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2731cccfc2abSDetlev Zundel 2732cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2733cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2734cccfc2abSDetlev Zundel 2735cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2736cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2737cccfc2abSDetlev Zundel 2738cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2739cccfc2abSDetlev Zundel Needed for mtdparts command support. 2740cccfc2abSDetlev Zundel 2741cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2742cccfc2abSDetlev Zundel 2743cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2744cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2745cccfc2abSDetlev Zundel 27466a11cf48SDaniel Schwierzeck- SPL framework 27476a11cf48SDaniel Schwierzeck CONFIG_SPL 27486a11cf48SDaniel Schwierzeck Enable building of SPL globally. 27496a11cf48SDaniel Schwierzeck 275095579793STom Rini CONFIG_SPL_LDSCRIPT 275195579793STom Rini LDSCRIPT for linking the SPL binary. 275295579793STom Rini 275395579793STom Rini CONFIG_SPL_MAX_SIZE 275495579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 275595579793STom Rini 27566a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 27576a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 27586a11cf48SDaniel Schwierzeck 275994a45bb1SScott Wood CONFIG_SPL_RELOC_TEXT_BASE 276094a45bb1SScott Wood Address to relocate to. If unspecified, this is equal to 276194a45bb1SScott Wood CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). 276294a45bb1SScott Wood 276395579793STom Rini CONFIG_SPL_BSS_START_ADDR 276495579793STom Rini Link address for the BSS within the SPL binary. 276595579793STom Rini 276695579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 276795579793STom Rini Maximum binary size of the BSS section of the SPL binary. 276895579793STom Rini 276995579793STom Rini CONFIG_SPL_STACK 277095579793STom Rini Adress of the start of the stack SPL will use 277195579793STom Rini 277294a45bb1SScott Wood CONFIG_SPL_RELOC_STACK 277394a45bb1SScott Wood Adress of the start of the stack SPL will use after 277494a45bb1SScott Wood relocation. If unspecified, this is equal to 277594a45bb1SScott Wood CONFIG_SPL_STACK. 277694a45bb1SScott Wood 277795579793STom Rini CONFIG_SYS_SPL_MALLOC_START 277895579793STom Rini Starting address of the malloc pool used in SPL. 277995579793STom Rini 278095579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 278195579793STom Rini The size of the malloc pool used in SPL. 27826a11cf48SDaniel Schwierzeck 278347f7bcaeSTom Rini CONFIG_SPL_FRAMEWORK 278447f7bcaeSTom Rini Enable the SPL framework under common/. This framework 278547f7bcaeSTom Rini supports MMC, NAND and YMODEM loading of U-Boot and NAND 278647f7bcaeSTom Rini NAND loading of the Linux Kernel. 278747f7bcaeSTom Rini 2788861a86f4STom Rini CONFIG_SPL_DISPLAY_PRINT 2789861a86f4STom Rini For ARM, enable an optional function to print more information 2790861a86f4STom Rini about the running system. 2791861a86f4STom Rini 27924b919725SScott Wood CONFIG_SPL_INIT_MINIMAL 27934b919725SScott Wood Arch init code should be built for a very small image 27944b919725SScott Wood 27956a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 27966a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 27976a11cf48SDaniel Schwierzeck 27986a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 27996a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 28006a11cf48SDaniel Schwierzeck 28016a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 28026a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 28036a11cf48SDaniel Schwierzeck 28046a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 28056a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 28066a11cf48SDaniel Schwierzeck 28076a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 28086a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 28096a11cf48SDaniel Schwierzeck 281095579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 281195579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 281295579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 281395579793STom Rini Address, size and partition on the MMC to load U-Boot from 281495579793STom Rini when the MMC is being used in raw mode. 281595579793STom Rini 281695579793STom Rini CONFIG_SPL_FAT_SUPPORT 281795579793STom Rini Support for fs/fat/libfat.o in SPL binary 281895579793STom Rini 281995579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 282095579793STom Rini Filename to read to load U-Boot when reading from FAT 282195579793STom Rini 282206f60ae3SScott Wood CONFIG_SPL_MPC83XX_WAIT_FOR_NAND 282306f60ae3SScott Wood Set this for NAND SPL on PPC mpc83xx targets, so that 282406f60ae3SScott Wood start.S waits for the rest of the SPL to load before 282506f60ae3SScott Wood continuing (the hardware starts execution after just 282606f60ae3SScott Wood loading the first page rather than the full 4K). 282706f60ae3SScott Wood 28286f2f01b9SScott Wood CONFIG_SPL_NAND_BASE 28296f2f01b9SScott Wood Include nand_base.c in the SPL. Requires 28306f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS. 28316f2f01b9SScott Wood 28326f2f01b9SScott Wood CONFIG_SPL_NAND_DRIVERS 28336f2f01b9SScott Wood SPL uses normal NAND drivers, not minimal drivers. 28346f2f01b9SScott Wood 28356f2f01b9SScott Wood CONFIG_SPL_NAND_ECC 28366f2f01b9SScott Wood Include standard software ECC in the SPL 28376f2f01b9SScott Wood 283895579793STom Rini CONFIG_SPL_NAND_SIMPLE 28397d4b7955SScott Wood Support for NAND boot using simple NAND drivers that 28407d4b7955SScott Wood expose the cmd_ctrl() interface. 284195579793STom Rini 284295579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 284395579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 284495579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 284595579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 284695579793STom Rini CONFIG_SYS_NAND_ECCBYTES 284795579793STom Rini Defines the size and behavior of the NAND that SPL uses 28487d4b7955SScott Wood to read U-Boot 284995579793STom Rini 285095579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 28517d4b7955SScott Wood Location in NAND to read U-Boot from 28527d4b7955SScott Wood 28537d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_DST 28547d4b7955SScott Wood Location in memory to load U-Boot to 28557d4b7955SScott Wood 28567d4b7955SScott Wood CONFIG_SYS_NAND_U_BOOT_SIZE 28577d4b7955SScott Wood Size of image to load 285895579793STom Rini 285995579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 28607d4b7955SScott Wood Entry point in loaded image to jump to 286195579793STom Rini 286295579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 286395579793STom Rini Define this if you need to first read the OOB and then the 286495579793STom Rini data. This is used for example on davinci plattforms. 286595579793STom Rini 286695579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 286795579793STom Rini Support for an OMAP3-specific set of functions to return the 286895579793STom Rini ID and MFR of the first attached NAND chip, if present. 286995579793STom Rini 28706a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 28716a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 28726a11cf48SDaniel Schwierzeck 28736a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 28746a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 28756a11cf48SDaniel Schwierzeck 28766a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 28776a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 28786a11cf48SDaniel Schwierzeck 2879c57b953dSPavel Machek CONFIG_SPL_RAM_DEVICE 2880c57b953dSPavel Machek Support for running image already present in ram, in SPL binary 2881c57b953dSPavel Machek 28826a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 28836a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 28841372cce2SMarian Balakowicz 288574752baaSScott Wood CONFIG_SPL_PAD_TO 288674752baaSScott Wood Linker address to which the SPL should be padded before 288774752baaSScott Wood appending the SPL payload. 288874752baaSScott Wood 2889ca2fca22SScott Wood CONFIG_SPL_TARGET 2890ca2fca22SScott Wood Final target image containing SPL and payload. Some SPLs 2891ca2fca22SScott Wood use an arch-specific makefile fragment instead, for 2892ca2fca22SScott Wood example if more than one image needs to be produced. 2893ca2fca22SScott Wood 2894c609719bSwdenkModem Support: 2895c609719bSwdenk-------------- 2896c609719bSwdenk 2897566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2898c609719bSwdenk 289911ccc33fSMarcel Ziswiler- Modem support enable: 2900c609719bSwdenk CONFIG_MODEM_SUPPORT 2901c609719bSwdenk 2902c609719bSwdenk- RTS/CTS Flow control enable: 2903c609719bSwdenk CONFIG_HWFLOW 2904c609719bSwdenk 2905c609719bSwdenk- Modem debug support: 2906c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2907c609719bSwdenk 2908c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2909c609719bSwdenk for modem support. Useful only with BDI2000. 2910c609719bSwdenk 2911a8c7c708Swdenk- Interrupt support (PPC): 2912a8c7c708Swdenk 2913a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2914a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 291511ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2916a8c7c708Swdenk should set decrementer_count to appropriate value. If 291711ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2918a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 291911ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2920a8c7c708Swdenk specific handling. If board has watchdog / status_led 2921a8c7c708Swdenk / other_activity_monitor it works automatically from 2922a8c7c708Swdenk general timer_interrupt(). 2923a8c7c708Swdenk 2924c609719bSwdenk- General: 2925c609719bSwdenk 2926c609719bSwdenk In the target system modem support is enabled when a 2927c609719bSwdenk specific key (key combination) is pressed during 2928c609719bSwdenk power-on. Otherwise U-Boot will boot normally 292911ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2930c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2931c609719bSwdenk function, returning 1 and thus enabling modem 2932c609719bSwdenk initialization. 2933c609719bSwdenk 2934c609719bSwdenk If there are no modem init strings in the 2935c609719bSwdenk environment, U-Boot proceed to autoboot; the 2936c609719bSwdenk previous output (banner, info printfs) will be 293711ccc33fSMarcel Ziswiler suppressed, though. 2938c609719bSwdenk 2939c609719bSwdenk See also: doc/README.Modem 2940c609719bSwdenk 29419660e442SHelmut RaigerBoard initialization settings: 29429660e442SHelmut Raiger------------------------------ 29439660e442SHelmut Raiger 29449660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 29459660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 29469660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 29479660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 29489660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 29499660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 29509660e442SHelmut Raiger 29519660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 29529660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 29539660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 29549660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2955c609719bSwdenk 2956c609719bSwdenkConfiguration Settings: 2957c609719bSwdenk----------------------- 2958c609719bSwdenk 29596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2960c609719bSwdenk undefine this when you're short of memory. 2961c609719bSwdenk 29622fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 29632fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 29642fb2604dSPeter Tyser 29656d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2966c609719bSwdenk prompt for user input. 2967c609719bSwdenk 29686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2969c609719bSwdenk 29706d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2971c609719bSwdenk 29726d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2973c609719bSwdenk 29746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2975c609719bSwdenk the application (usually a Linux kernel) when it is 2976c609719bSwdenk booted 2977c609719bSwdenk 29786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2979c609719bSwdenk List of legal baudrate settings for this board. 2980c609719bSwdenk 29816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2982c609719bSwdenk Suppress display of console information at boot. 2983c609719bSwdenk 29846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2985c609719bSwdenk If the board specific function 2986c609719bSwdenk extern int overwrite_console (void); 2987c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2988c609719bSwdenk serial port, else the settings in the environment are used. 2989c609719bSwdenk 29906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2991c609719bSwdenk Enable the call to overwrite_console(). 2992c609719bSwdenk 29936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2994c609719bSwdenk Enable overwrite of previous console environment settings. 2995c609719bSwdenk 29966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2997c609719bSwdenk Begin and End addresses of the area used by the 2998c609719bSwdenk simple memory test. 2999c609719bSwdenk 30006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 3001c609719bSwdenk Enable an alternate, more extensive memory test. 3002c609719bSwdenk 30036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 30045f535fe1Swdenk Scratch address used by the alternate memory test 30055f535fe1Swdenk You only need to set this if address zero isn't writeable 30065f535fe1Swdenk 30076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 30086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 300914f73ca6SStefan Roese this specified memory area will get subtracted from the top 301011ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 301114f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 301214f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 301314f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 30145e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 301514f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 30165e12e75dSStefan Roese will have to get fixed in Linux additionally. 301714f73ca6SStefan Roese 301814f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 301914f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 302014f73ca6SStefan Roese be touched. 302114f73ca6SStefan Roese 302214f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 302314f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 302414f73ca6SStefan Roese then the end address of the Linux memory will be located at a 302514f73ca6SStefan Roese non page size aligned address and this could cause major 302614f73ca6SStefan Roese problems. 302714f73ca6SStefan Roese 30286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 3029c609719bSwdenk Enable temporary baudrate change while serial download 3030c609719bSwdenk 30316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 3032c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 3033c609719bSwdenk 30346d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 3035c609719bSwdenk Physical start address of Motherboard I/O (if using a 3036c609719bSwdenk Cogent motherboard) 3037c609719bSwdenk 30386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 3039c609719bSwdenk Physical start address of Flash memory. 3040c609719bSwdenk 30416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 3042c609719bSwdenk Physical start address of boot monitor code (set by 3043c609719bSwdenk make config files to be same as the text base address 304414d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 30456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 3046c609719bSwdenk 30476d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 30483b57fe0aSwdenk Size of memory reserved for monitor code, used to 30493b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 30503b57fe0aSwdenk embedded within the U-Boot image, or in a separate 30513b57fe0aSwdenk flash sector. 3052c609719bSwdenk 30536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 3054c609719bSwdenk Size of DRAM reserved for malloc() use. 3055c609719bSwdenk 30566d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 305715940c9aSStefan Roese Normally compressed uImages are limited to an 305815940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 30596d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 306015940c9aSStefan Roese to adjust this setting to your needs. 3061c609719bSwdenk 30626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 3063c609719bSwdenk Maximum size of memory mapped by the startup code of 3064c609719bSwdenk the Linux kernel; all data that must be processed by 30657d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 30667d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 30677d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 30687d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 3069c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 3070c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 3071c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 3072c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 3073c609719bSwdenk 3074fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 3075fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 3076fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 3077fca43cc8SJohn Rigby is enabled. 3078fca43cc8SJohn Rigby 3079fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 3080fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 3081fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 3082fca43cc8SJohn Rigby 3083fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 3084fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 3085fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 3086fca43cc8SJohn Rigby 30876d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 3088c609719bSwdenk Max number of Flash memory banks 3089c609719bSwdenk 30906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 3091c609719bSwdenk Max number of sectors on a Flash chip 3092c609719bSwdenk 30936d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 3094c609719bSwdenk Timeout for Flash erase operations (in ms) 3095c609719bSwdenk 30966d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 3097c609719bSwdenk Timeout for Flash write operations (in ms) 3098c609719bSwdenk 30996d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 31008564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 31018564acf9Swdenk 31026d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 31038564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 31048564acf9Swdenk 31056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 31068564acf9Swdenk If defined, hardware flash sectors protection is used 31078564acf9Swdenk instead of U-Boot software protection. 31088564acf9Swdenk 31096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 3110c609719bSwdenk 3111c609719bSwdenk Enable TFTP transfers directly to flash memory; 3112c609719bSwdenk without this option such a download has to be 3113c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 3114c609719bSwdenk copy from RAM to flash. 3115c609719bSwdenk 3116c609719bSwdenk The two-step approach is usually more reliable, since 3117c609719bSwdenk you can check if the download worked before you erase 311811ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 311911ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 3120c609719bSwdenk downloaded image) this option may be very useful. 3121c609719bSwdenk 31226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 3123c609719bSwdenk Define if the flash driver uses extra elements in the 31245653fc33Swdenk common flash structure for storing flash geometry. 31255653fc33Swdenk 312600b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 31275653fc33Swdenk This option also enables the building of the cfi_flash driver 31285653fc33Swdenk in the drivers directory 312953cf9435Sstroese 313091809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 313191809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 313291809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 313391809ed5SPiotr Ziecik to the MTD layer. 313491809ed5SPiotr Ziecik 31356d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 313696ef831fSGuennadi Liakhovetski Use buffered writes to flash. 313796ef831fSGuennadi Liakhovetski 313896ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 313996ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 314096ef831fSGuennadi Liakhovetski write commands. 314196ef831fSGuennadi Liakhovetski 31426d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 31435568e613SStefan Roese If this option is defined, the common CFI flash doesn't 31445568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 31455568e613SStefan Roese is useful, if some of the configured banks are only 31465568e613SStefan Roese optionally available. 31475568e613SStefan Roese 31489a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 31499a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 31509a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 31519a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 31529a042e9cSJerry Van Baren 31536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 315411ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 315511ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 315653cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 315753cf9435Sstroese buffers can be full shortly after enabling the interface 315811ccc33fSMarcel Ziswiler on high Ethernet traffic. 315953cf9435Sstroese Defaults to 4 if not defined. 3160c609719bSwdenk 3161ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 3162ea882bafSWolfgang Denk 3163ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 3164ea882bafSWolfgang Denk internally to store the environment settings. The default 3165ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 3166ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 3167ea882bafSWolfgang Denk lib/hashtable.c for details. 3168ea882bafSWolfgang Denk 31692598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_DEFAULT 31702598090bSJoe Hershberger- CONFIG_ENV_FLAGS_LIST_STATIC 31712598090bSJoe Hershberger Enable validation of the values given to enviroment variables when 31722598090bSJoe Hershberger calling env set. Variables can be restricted to only decimal, 31732598090bSJoe Hershberger hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, 31742598090bSJoe Hershberger the variables can also be restricted to IP address or MAC address. 31752598090bSJoe Hershberger 31762598090bSJoe Hershberger The format of the list is: 31772598090bSJoe Hershberger type_attribute = [s|d|x|b|i|m] 3178267541f7SJoe Hershberger access_atribute = [a|r|o|c] 3179267541f7SJoe Hershberger attributes = type_attribute[access_atribute] 31802598090bSJoe Hershberger entry = variable_name[:attributes] 31812598090bSJoe Hershberger list = entry[,list] 31822598090bSJoe Hershberger 31832598090bSJoe Hershberger The type attributes are: 31842598090bSJoe Hershberger s - String (default) 31852598090bSJoe Hershberger d - Decimal 31862598090bSJoe Hershberger x - Hexadecimal 31872598090bSJoe Hershberger b - Boolean ([1yYtT|0nNfF]) 31882598090bSJoe Hershberger i - IP address 31892598090bSJoe Hershberger m - MAC address 31902598090bSJoe Hershberger 3191267541f7SJoe Hershberger The access attributes are: 3192267541f7SJoe Hershberger a - Any (default) 3193267541f7SJoe Hershberger r - Read-only 3194267541f7SJoe Hershberger o - Write-once 3195267541f7SJoe Hershberger c - Change-default 3196267541f7SJoe Hershberger 31972598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_DEFAULT 31982598090bSJoe Hershberger Define this to a list (string) to define the ".flags" 31992598090bSJoe Hershberger envirnoment variable in the default or embedded environment. 32002598090bSJoe Hershberger 32012598090bSJoe Hershberger - CONFIG_ENV_FLAGS_LIST_STATIC 32022598090bSJoe Hershberger Define this to a list (string) to define validation that 32032598090bSJoe Hershberger should be done if an entry is not found in the ".flags" 32042598090bSJoe Hershberger environment variable. To override a setting in the static 32052598090bSJoe Hershberger list, simply add an entry for the same variable name to the 32062598090bSJoe Hershberger ".flags" variable. 32072598090bSJoe Hershberger 3208267541f7SJoe Hershberger- CONFIG_ENV_ACCESS_IGNORE_FORCE 3209267541f7SJoe Hershberger If defined, don't allow the -f switch to env set override variable 3210267541f7SJoe Hershberger access flags. 3211267541f7SJoe Hershberger 3212c609719bSwdenkThe following definitions that deal with the placement and management 3213c609719bSwdenkof environment data (variable area); in general, we support the 3214c609719bSwdenkfollowing configurations: 3215c609719bSwdenk 3216c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 3217c3eb3fe4SMike Frysinger 3218c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 3219c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 3220c3eb3fe4SMike Frysinger 32215a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 3222c609719bSwdenk 3223c609719bSwdenk Define this if the environment is in flash memory. 3224c609719bSwdenk 3225c609719bSwdenk a) The environment occupies one whole flash sector, which is 3226c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 3227c609719bSwdenk happens usually with "bottom boot sector" or "top boot 3228c609719bSwdenk sector" type flash chips, which have several smaller 3229c609719bSwdenk sectors at the start or the end. For instance, such a 3230c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 3231c609719bSwdenk such a case you would place the environment in one of the 3232c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 3233c609719bSwdenk "top boot sector" type flash chips, you would put the 3234c609719bSwdenk environment in one of the last sectors, leaving a gap 3235c609719bSwdenk between U-Boot and the environment. 3236c609719bSwdenk 32370e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3238c609719bSwdenk 3239c609719bSwdenk Offset of environment data (variable area) to the 3240c609719bSwdenk beginning of flash memory; for instance, with bottom boot 3241c609719bSwdenk type flash chips the second sector can be used: the offset 3242c609719bSwdenk for this sector is given here. 3243c609719bSwdenk 32446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 3245c609719bSwdenk 32460e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3247c609719bSwdenk 3248c609719bSwdenk This is just another way to specify the start address of 3249c609719bSwdenk the flash sector containing the environment (instead of 32500e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 3251c609719bSwdenk 32520e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 3253c609719bSwdenk 3254c609719bSwdenk Size of the sector containing the environment. 3255c609719bSwdenk 3256c609719bSwdenk 3257c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 3258c609719bSwdenk In such a case you don't want to spend a whole sector for 3259c609719bSwdenk the environment. 3260c609719bSwdenk 32610e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3262c609719bSwdenk 32635a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 32640e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 3265c609719bSwdenk of this flash sector for the environment. This saves 3266c609719bSwdenk memory for the RAM copy of the environment. 3267c609719bSwdenk 3268c609719bSwdenk It may also save flash memory if you decide to use this 3269c609719bSwdenk when your environment is "embedded" within U-Boot code, 3270c609719bSwdenk since then the remainder of the flash sector could be used 3271c609719bSwdenk for U-Boot code. It should be pointed out that this is 3272c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 3273c609719bSwdenk updating the environment in flash makes it always 3274c609719bSwdenk necessary to erase the WHOLE sector. If something goes 3275c609719bSwdenk wrong before the contents has been restored from a copy in 3276c609719bSwdenk RAM, your target system will be dead. 3277c609719bSwdenk 32780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 32790e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 3280c609719bSwdenk 3281c609719bSwdenk These settings describe a second storage area used to hold 328211ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 32833e38691eSwdenk a valid backup copy in case there is a power failure during 3284c609719bSwdenk a "saveenv" operation. 3285c609719bSwdenk 3286c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 3287c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 3288c609719bSwdenkaccordingly! 3289c609719bSwdenk 3290c609719bSwdenk 32919314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 3292c609719bSwdenk 3293c609719bSwdenk Define this if you have some non-volatile memory device 3294c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3295c609719bSwdenk environment. 3296c609719bSwdenk 32970e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 32980e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3299c609719bSwdenk 330011ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3301c609719bSwdenk want to use for environment. It is assumed that this memory 3302c609719bSwdenk can just be read and written to, without any special 3303c609719bSwdenk provision. 3304c609719bSwdenk 3305c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3306c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 330711ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3308c609719bSwdenkU-Boot will hang. 3309c609719bSwdenk 3310c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3311c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3312c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3313c609719bSwdenkto save the current settings. 3314c609719bSwdenk 3315c609719bSwdenk 3316bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3317c609719bSwdenk 3318c609719bSwdenk Use this if you have an EEPROM or similar serial access 3319c609719bSwdenk device and a driver for it. 3320c609719bSwdenk 33210e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 33220e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3323c609719bSwdenk 3324c609719bSwdenk These two #defines specify the offset and size of the 3325c609719bSwdenk environment area within the total memory of your EEPROM. 3326c609719bSwdenk 33276d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3328c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3329c609719bSwdenk The default address is zero. 3330c609719bSwdenk 33316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3332c609719bSwdenk If defined, the number of bits used to address bytes in a 3333c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3334c609719bSwdenk would require six bits. 3335c609719bSwdenk 33366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3337c609719bSwdenk If defined, the number of milliseconds to delay between 3338c609719bSwdenk page writes. The default is zero milliseconds. 3339c609719bSwdenk 33406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3341c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3342c609719bSwdenk that this is NOT the chip address length! 3343c609719bSwdenk 33446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 33455cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 33465cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 33475cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 33485cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 33495cf91d6bSwdenk byte chips. 33505cf91d6bSwdenk 33515cf91d6bSwdenk Note that we consider the length of the address field to 33525cf91d6bSwdenk still be one byte because the extra address bits are hidden 33535cf91d6bSwdenk in the chip address. 33545cf91d6bSwdenk 33556d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3356c609719bSwdenk The size in bytes of the EEPROM device. 3357c609719bSwdenk 3358548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3359548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3360548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3361548738b4SHeiko Schocher 3362548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3363548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3364548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3365548738b4SHeiko Schocher EEPROM. For example: 3366548738b4SHeiko Schocher 3367548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3368548738b4SHeiko Schocher 3369548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3370548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3371c609719bSwdenk 3372057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 33735779d8d9Swdenk 33745779d8d9Swdenk Define this if you have a DataFlash memory device which you 33755779d8d9Swdenk want to use for the environment. 33765779d8d9Swdenk 33770e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 33780e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 33790e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 33805779d8d9Swdenk 33815779d8d9Swdenk These three #defines specify the offset and size of the 33825779d8d9Swdenk environment area within the total memory of your DataFlash placed 33835779d8d9Swdenk at the specified address. 33845779d8d9Swdenk 33850a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 33860a85a9e7SLiu Gang 33870a85a9e7SLiu Gang Define this if you have a remote memory space which you 33880a85a9e7SLiu Gang want to use for the local device's environment. 33890a85a9e7SLiu Gang 33900a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 33910a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 33920a85a9e7SLiu Gang 33930a85a9e7SLiu Gang These two #defines specify the address and size of the 33940a85a9e7SLiu Gang environment area within the remote memory space. The 33950a85a9e7SLiu Gang local device can get the environment from remote memory 3396fc54c7faSLiu Gang space by SRIO or PCIE links. 33970a85a9e7SLiu Gang 33980a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 33990a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3400fc54c7faSLiu Gangenvironment stored in a remote NOR flash by SRIO or PCIE link, 3401fc54c7faSLiu Gangbut it can not erase, write this NOR flash by SRIO or PCIE interface. 34020a85a9e7SLiu Gang 340351bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 340413a5695bSwdenk 340513a5695bSwdenk Define this if you have a NAND device which you want to use 340613a5695bSwdenk for the environment. 340713a5695bSwdenk 34080e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 34090e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 341013a5695bSwdenk 341113a5695bSwdenk These two #defines specify the offset and size of the environment 3412fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3413fdd813deSScott Wood aligned to an erase block boundary. 34145779d8d9Swdenk 3415fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3416e443c944SMarkus Klotzbuecher 34170e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3418fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3419fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3420fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3421fdd813deSScott Wood aligned to an erase block boundary. 3422e443c944SMarkus Klotzbuecher 3423fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3424fdd813deSScott Wood 3425fdd813deSScott Wood Specifies the length of the region in which the environment 3426fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3427fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3428fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3429fdd813deSScott Wood the range to be avoided. 3430fdd813deSScott Wood 3431fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3432fdd813deSScott Wood 3433fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3434fdd813deSScott Wood environment from block zero's out-of-band data. The 3435fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3436fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3437fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3438e443c944SMarkus Klotzbuecher 3439b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3440b74ab737SGuennadi Liakhovetski 3441b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3442b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3443b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3444b74ab737SGuennadi Liakhovetski 34456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3446c609719bSwdenk 3447c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3448c609719bSwdenk area is used at an early stage (ROM part) if the environment 3449c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3450c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3451c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3452c609719bSwdenk to be a good choice since it makes it far enough from the 3453c609719bSwdenk start of the data area as well as from the stack pointer. 3454c609719bSwdenk 3455e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3456c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3457cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3458c609719bSwdenkuntil then to read environment variables. 3459c609719bSwdenk 346085ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 346185ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 346285ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 346385ec0bccSwdenknecessary, because the first environment variable we need is the 346485ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 346585ec0bccSwdenkhave any device yet where we could complain.] 3466c609719bSwdenk 3467c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3468c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 346985ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3470c609719bSwdenk 34716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3472fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3473fc3e2165Swdenk 34746d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3475fc3e2165Swdenk also needs to be defined. 3476fc3e2165Swdenk 34776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3478fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3479c609719bSwdenk 3480f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3481f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3482f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3483f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3484f5675aa5SRon Madrid space for already greatly restricted images, including but not 3485f5675aa5SRon Madrid limited to NAND_SPL configurations. 3486f5675aa5SRon Madrid 3487b2b92f53SSimon Glass- CONFIG_DISPLAY_BOARDINFO 3488b2b92f53SSimon Glass Display information about the board that U-Boot is running on 3489b2b92f53SSimon Glass when U-Boot starts up. The board function checkboard() is called 3490b2b92f53SSimon Glass to do this. 3491b2b92f53SSimon Glass 3492e2e3e2b1SSimon Glass- CONFIG_DISPLAY_BOARDINFO_LATE 3493e2e3e2b1SSimon Glass Similar to the previous option, but display this information 3494e2e3e2b1SSimon Glass later, once stdio is running and output goes to the LCD, if 3495e2e3e2b1SSimon Glass present. 3496e2e3e2b1SSimon Glass 3497c609719bSwdenkLow Level (hardware related) configuration options: 3498dc7c9a1aSwdenk--------------------------------------------------- 3499c609719bSwdenk 35006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3501c609719bSwdenk Cache Line Size of the CPU. 3502c609719bSwdenk 35036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3504c609719bSwdenk Default address of the IMMR after system reset. 35052535d602Swdenk 35062535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 35072535d602Swdenk and RPXsuper) to be able to adjust the position of 35082535d602Swdenk the IMMR register after a reset. 3509c609719bSwdenk 3510e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3511e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3512e46fedfeSTimur Tabi PowerPC SOCs. 3513e46fedfeSTimur Tabi 3514e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3515e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3516e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3517e46fedfeSTimur Tabi 3518e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3519e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3520e46fedfeSTimur Tabi 3521e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3522e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3523e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3524e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3525e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3526e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3527e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3528e46fedfeSTimur Tabi 3529e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3530e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3531e46fedfeSTimur Tabi 3532e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3533e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3534e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3535e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3536e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3537e46fedfeSTimur Tabi 3538e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3539e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3540e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3541e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3542e46fedfeSTimur Tabi 3543e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3544e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3545e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3546e46fedfeSTimur Tabi 35477f6c2cbcSwdenk- Floppy Disk Support: 35486d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 35497f6c2cbcSwdenk 35507f6c2cbcSwdenk the default drive number (default value 0) 35517f6c2cbcSwdenk 35526d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 35537f6c2cbcSwdenk 355411ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 35557f6c2cbcSwdenk (default value 1) 35567f6c2cbcSwdenk 35576d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 35587f6c2cbcSwdenk 35597f6c2cbcSwdenk defines the offset of register from address. It 35607f6c2cbcSwdenk depends on which part of the data bus is connected to 356111ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 35627f6c2cbcSwdenk 35636d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 35646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 35657f6c2cbcSwdenk default value. 35667f6c2cbcSwdenk 35676d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 35687f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 35697f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 35707f6c2cbcSwdenk source code. It is used to make hardware dependant 35717f6c2cbcSwdenk initializations. 35727f6c2cbcSwdenk 35730abddf82SMacpaul Lin- CONFIG_IDE_AHB: 35740abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 35750abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 35760abddf82SMacpaul Lin When software is doing ATA command and data transfer to 35770abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 35780abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 35790abddf82SMacpaul Lin is requierd. 35800abddf82SMacpaul Lin 35816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 358225d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 358325d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3584c609719bSwdenk 35856d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3586c609719bSwdenk 35877152b1d0Swdenk Start address of memory area that can be used for 3588c609719bSwdenk initial data and stack; please note that this must be 3589c609719bSwdenk writable memory that is working WITHOUT special 3590c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3591c609719bSwdenk will become available only after programming the 3592c609719bSwdenk memory controller and running certain initialization 3593c609719bSwdenk sequences. 3594c609719bSwdenk 3595c609719bSwdenk U-Boot uses the following memory types: 3596c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3597c609719bSwdenk - MPC824X: data cache 3598c609719bSwdenk - PPC4xx: data cache 3599c609719bSwdenk 36006d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3601c609719bSwdenk 3602c609719bSwdenk Offset of the initial data structure in the memory 36036d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 36046d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3605c609719bSwdenk data is located at the end of the available space 3606553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 36076d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 36086d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 36096d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3610c609719bSwdenk 3611c609719bSwdenk Note: 3612c609719bSwdenk On the MPC824X (or other systems that use the data 3613c609719bSwdenk cache for initial memory) the address chosen for 36146d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3615c609719bSwdenk point to an otherwise UNUSED address space between 3616c609719bSwdenk the top of RAM and the start of the PCI space. 3617c609719bSwdenk 36186d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3619c609719bSwdenk 36206d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3621c609719bSwdenk 36226d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3623c609719bSwdenk 36246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3625c609719bSwdenk 36266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3627c609719bSwdenk 36286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3629c609719bSwdenk 36306d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3631c609719bSwdenk SDRAM timing 3632c609719bSwdenk 36336d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3634c609719bSwdenk periodic timer for refresh 3635c609719bSwdenk 36366d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3637c609719bSwdenk 36386d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 36396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 36406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 36416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3642c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3643c609719bSwdenk 3644c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 36456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 36466d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3647c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3648c609719bSwdenk 36496d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 36506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3651c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3652c609719bSwdenk Prescaler definitions (SDRAM timing) 3653c609719bSwdenk 36546d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3655c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3656c609719bSwdenk define relocation offset in DPRAM [DSP2] 3657c609719bSwdenk 36586d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3659b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3660b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3661b423d055SHeiko Schocher 36626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3663c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3664c609719bSwdenk define relocation offset in DPRAM [SCC4] 3665c609719bSwdenk 36666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3667c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3668c609719bSwdenk wrong setting might damage your board. Read 3669c609719bSwdenk doc/README.MBX before setting this variable! 3670c609719bSwdenk 36716d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3672ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3673ea909b76Swdenk (Power On Self Tests). This definition overrides 3674ea909b76Swdenk #define'd default value in commproc.h resp. 3675ea909b76Swdenk cpm_8260.h. 3676ea909b76Swdenk 36776d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 36786d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 36796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 36806d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 36816d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 36826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 36836d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 36846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3685a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 36865d232d0eSwdenk 36879cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 36889cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 36899cacf4fcSDirk Eibach required. 36909cacf4fcSDirk Eibach 369169fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 369269fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 369369fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 369469fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 369569fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 369669fd2d3bSAndrew Sharp by coreboot or similar. 369769fd2d3bSAndrew Sharp 3698a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3699a09b9b68SKumar Gala Chip has SRIO or not 3700a09b9b68SKumar Gala 3701a09b9b68SKumar Gala- CONFIG_SRIO1: 3702a09b9b68SKumar Gala Board has SRIO 1 port available 3703a09b9b68SKumar Gala 3704a09b9b68SKumar Gala- CONFIG_SRIO2: 3705a09b9b68SKumar Gala Board has SRIO 2 port available 3706a09b9b68SKumar Gala 3707a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3708a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3709a09b9b68SKumar Gala 3710a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3711a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3712a09b9b68SKumar Gala 3713a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3714a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3715a09b9b68SKumar Gala 3716eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3717eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3718eced4626SAlex Waterman 16 bit bus. 3719eced4626SAlex Waterman 3720eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3721eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3722eced4626SAlex Waterman a default value will be used. 3723eced4626SAlex Waterman 3724bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3725218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3726218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3727218ca724SWolfgang Denk 3728bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3729bb99ad6dSBen Warren I2C address of the SPD EEPROM 3730bb99ad6dSBen Warren 37316d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3732218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3733218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3734218ca724SWolfgang Denk to something your driver can deal with. 3735bb99ad6dSBen Warren 37361b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 37371b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 37381b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 37391b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 37401b3e3c4fSYork Sun header files or board specific files. 37411b3e3c4fSYork Sun 37426f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 37436f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 37446f5e1dc5SYork Sun 37456d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3746218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3747218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 37482ad6b513STimur Tabi 3749c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3750c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3751c26e454dSwdenk 3752c26e454dSwdenk- CONFIG_FEC[12]_PHY 3753c26e454dSwdenk Define to the hardcoded PHY address which corresponds 37546e592385Swdenk to the given FEC; i. e. 3755c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3756c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3757c26e454dSwdenk 3758c26e454dSwdenk When set to -1, means to probe for first available. 3759c26e454dSwdenk 3760c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3761c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3762c26e454dSwdenk (so program the FEC to ignore it). 3763c26e454dSwdenk 3764c26e454dSwdenk- CONFIG_RMII 3765c26e454dSwdenk Enable RMII mode for all FECs. 3766c26e454dSwdenk Note that this is a global option, we can't 3767c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3768c26e454dSwdenk 37695cf91d6bSwdenk- CONFIG_CRC32_VERIFY 37705cf91d6bSwdenk Add a verify option to the crc32 command. 37715cf91d6bSwdenk The syntax is: 37725cf91d6bSwdenk 37735cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 37745cf91d6bSwdenk 37755cf91d6bSwdenk Where address/count indicate a memory area 37765cf91d6bSwdenk and crc32 is the correct crc32 which the 37775cf91d6bSwdenk area should have. 37785cf91d6bSwdenk 377956523f12Swdenk- CONFIG_LOOPW 378056523f12Swdenk Add the "loopw" memory command. This only takes effect if 3781602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 378256523f12Swdenk 37837b466641Sstroese- CONFIG_MX_CYCLIC 37847b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 37857b466641Sstroese "md/mw" commands. 37867b466641Sstroese Examples: 37877b466641Sstroese 37887b466641Sstroese => mdc.b 10 4 500 37897b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 37907b466641Sstroese 37917b466641Sstroese => mwc.l 100 12345678 10 37927b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 37937b466641Sstroese 37947b466641Sstroese This only takes effect if the memory commands are activated 3795602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 37967b466641Sstroese 37978aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3798afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3799e03f3169SWolfgang Denk low level initializations (like setting up the memory 3800e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3801e03f3169SWolfgang Denk relocate itself into RAM. 38028aa1a2d1Swdenk 3803e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3804e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3805e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3806e03f3169SWolfgang Denk these initializations itself. 38078aa1a2d1Swdenk 3808401bb30bSAneesh V- CONFIG_SPL_BUILD 3809df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3810df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3811df81238bSMagnus Lilja compiling a NAND SPL. 3812400558b5Swdenk 3813d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3814d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3815d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3816d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3817d8834a13SMatthias Weisser conditions but may increase the binary size. 3818d8834a13SMatthias Weisser 3819*588a13f7SSimon Glass- CONFIG_X86_RESET_VECTOR 3820*588a13f7SSimon Glass If defined, the x86 reset vector code is included. This is not 3821*588a13f7SSimon Glass needed when U-Boot is running from Coreboot. 3822b16f521aSGabe Black 38235b5ece9eSGabe Black- CONFIG_X86_NO_REAL_MODE 38245b5ece9eSGabe Black If defined, x86 real mode code is omitted. This assumes a 38255b5ece9eSGabe Black 32-bit environment where such code is not needed. You will 38265b5ece9eSGabe Black need to do this when U-Boot is running from Coreboot. 38275b5ece9eSGabe Black 38285b5ece9eSGabe Black 3829f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3830f2717b47STimur Tabi----------------------------------- 3831f2717b47STimur Tabi 3832f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3833f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3834f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3835f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3836f2717b47STimur Tabiwithin that device. 3837f2717b47STimur Tabi 3838f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3839f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3840f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3841f2717b47STimur Tabi is also specified. 3842f2717b47STimur Tabi 3843f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3844f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3845f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3846f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3847f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3848f2717b47STimur Tabi 3849f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3850f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3851f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3852f2717b47STimur Tabi virtual address in NOR flash. 3853f2717b47STimur Tabi 3854f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3855f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3856f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3857f2717b47STimur Tabi 3858f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3859f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3860f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3861f2717b47STimur Tabi 3862f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3863f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3864f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3865f2717b47STimur Tabi 3866292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3867292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3868292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3869fc54c7faSLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound 3870fc54c7faSLiu Gang window->master inbound window->master LAW->the ucode address in 3871fc54c7faSLiu Gang master's memory space. 3872f2717b47STimur Tabi 3873c609719bSwdenkBuilding the Software: 3874c609719bSwdenk====================== 3875c609719bSwdenk 3876218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3877218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3878218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3879218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3880218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3881218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3882c609719bSwdenk 3883218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3884218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3885218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3886218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3887218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3888c609719bSwdenk 3889218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3890218ca724SWolfgang Denk $ export CROSS_COMPILE 3891c609719bSwdenk 38922f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 38932f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 38942f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 38952f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 38962f8d396bSPeter Tyser 38972f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 38982f8d396bSPeter Tyser 38992f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 39002f8d396bSPeter Tyser be executed on computers running Windows. 39012f8d396bSPeter Tyser 3902c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3903c609719bSwdenksources you must configure U-Boot for one specific board type. This 3904c609719bSwdenkis done by typing: 3905c609719bSwdenk 3906c609719bSwdenk make NAME_config 3907c609719bSwdenk 3908218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 39094d675ae6SMichael Jonesrations; see boards.cfg for supported names. 391054387ac9Swdenk 3911c609719bSwdenkNote: for some board special configuration names may exist; check if 3912c609719bSwdenk additional information is available from the board vendor; for 39132729af9dSwdenk instance, the TQM823L systems are available without (standard) 39142729af9dSwdenk or with LCD support. You can select such additional "features" 391511ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3916c609719bSwdenk 39172729af9dSwdenk make TQM823L_config 39182729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3919c609719bSwdenk 3920c609719bSwdenk make TQM823L_LCD_config 3921c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3922c609719bSwdenk 3923c609719bSwdenk etc. 3924c609719bSwdenk 3925c609719bSwdenk 3926c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 39277152b1d0Swdenkimages ready for download to / installation on your system: 3928c609719bSwdenk 3929c609719bSwdenk- "u-boot.bin" is a raw binary image 3930c609719bSwdenk- "u-boot" is an image in ELF binary format 3931c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3932c609719bSwdenk 3933baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3934baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3935baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3936baf31249SMarian Balakowicz 3937baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3938baf31249SMarian Balakowicz 3939baf31249SMarian Balakowicz make O=/tmp/build distclean 3940baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3941baf31249SMarian Balakowicz make O=/tmp/build all 3942baf31249SMarian Balakowicz 3943baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3944baf31249SMarian Balakowicz 3945baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3946baf31249SMarian Balakowicz make distclean 3947baf31249SMarian Balakowicz make NAME_config 3948baf31249SMarian Balakowicz make all 3949baf31249SMarian Balakowicz 3950baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3951baf31249SMarian Balakowiczvariable. 3952baf31249SMarian Balakowicz 3953c609719bSwdenk 3954c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3955c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3956c609719bSwdenknative "make". 3957c609719bSwdenk 3958c609719bSwdenk 3959c609719bSwdenkIf the system board that you have is not listed, then you will need 3960c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3961c609719bSwdenksteps: 3962c609719bSwdenk 3963c609719bSwdenk1. Add a new configuration option for your board to the toplevel 39644d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 39654d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3966c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 396785ec0bccSwdenk files you need. In your board directory, you will need at least 396885ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 396985ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 397085ec0bccSwdenk your board 3971c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3972c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 397385ec0bccSwdenk4. Run "make <board>_config" with your new name. 3974c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3975c609719bSwdenk to be installed on your target system. 397685ec0bccSwdenk6. Debug and solve any problems that might arise. 3977c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3978c609719bSwdenk 3979c609719bSwdenk 3980c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3981c609719bSwdenk============================================================== 3982c609719bSwdenk 3983c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3984c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3985c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3986c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3987218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3988c609719bSwdenk 3989c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3990c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3991c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3992c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3993c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 39947152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3995218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3996218ca724SWolfgang Denkyou can type 3997c609719bSwdenk 3998c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3999c609719bSwdenk 4000c609719bSwdenkor to build on a native PowerPC system you can type 4001c609719bSwdenk 4002c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 4003c609719bSwdenk 4004218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 4005218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 4006218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 4007218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 4008218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 4009218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 4010218ca724SWolfgang Denkvariable. For example: 4011baf31249SMarian Balakowicz 4012baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 4013baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 4014baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 4015baf31249SMarian Balakowicz 4016218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 4017218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 4018218ca724SWolfgang Denkduring the whole build process. 4019baf31249SMarian Balakowicz 4020baf31249SMarian Balakowicz 4021c609719bSwdenkSee also "U-Boot Porting Guide" below. 4022c609719bSwdenk 4023c609719bSwdenk 4024c609719bSwdenkMonitor Commands - Overview: 4025c609719bSwdenk============================ 4026c609719bSwdenk 4027c609719bSwdenkgo - start application at address 'addr' 4028c609719bSwdenkrun - run commands in an environment variable 4029c609719bSwdenkbootm - boot application image from memory 4030c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 403144f074c7SMarek Vasutbootz - boot zImage from memory 4032c609719bSwdenktftpboot- boot image via network using TFTP protocol 4033c609719bSwdenk and env variables "ipaddr" and "serverip" 4034c609719bSwdenk (and eventually "gatewayip") 40351fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 4036c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 4037c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 4038c609719bSwdenkloads - load S-Record file over serial line 4039c609719bSwdenkloadb - load binary file over serial line (kermit mode) 4040c609719bSwdenkmd - memory display 4041c609719bSwdenkmm - memory modify (auto-incrementing) 4042c609719bSwdenknm - memory modify (constant address) 4043c609719bSwdenkmw - memory write (fill) 4044c609719bSwdenkcp - memory copy 4045c609719bSwdenkcmp - memory compare 4046c609719bSwdenkcrc32 - checksum calculation 40470f89c54bSPeter Tyseri2c - I2C sub-system 4048c609719bSwdenksspi - SPI utility commands 4049c609719bSwdenkbase - print or set address offset 4050c609719bSwdenkprintenv- print environment variables 4051c609719bSwdenksetenv - set environment variables 4052c609719bSwdenksaveenv - save environment variables to persistent storage 4053c609719bSwdenkprotect - enable or disable FLASH write protection 4054c609719bSwdenkerase - erase FLASH memory 4055c609719bSwdenkflinfo - print FLASH memory information 405610635afaSKarl O. Pincnand - NAND memory operations (see doc/README.nand) 4057c609719bSwdenkbdinfo - print Board Info structure 4058c609719bSwdenkiminfo - print header information for application image 4059c609719bSwdenkconinfo - print console devices and informations 4060c609719bSwdenkide - IDE sub-system 4061c609719bSwdenkloop - infinite loop on address range 406256523f12Swdenkloopw - infinite write loop on address range 4063c609719bSwdenkmtest - simple RAM test 4064c609719bSwdenkicache - enable or disable instruction cache 4065c609719bSwdenkdcache - enable or disable data cache 4066c609719bSwdenkreset - Perform RESET of the CPU 4067c609719bSwdenkecho - echo args to console 4068c609719bSwdenkversion - print monitor version 4069c609719bSwdenkhelp - print online help 4070c609719bSwdenk? - alias for 'help' 4071c609719bSwdenk 4072c609719bSwdenk 4073c609719bSwdenkMonitor Commands - Detailed Description: 4074c609719bSwdenk======================================== 4075c609719bSwdenk 4076c609719bSwdenkTODO. 4077c609719bSwdenk 4078c609719bSwdenkFor now: just type "help <command>". 4079c609719bSwdenk 4080c609719bSwdenk 4081c609719bSwdenkEnvironment Variables: 4082c609719bSwdenk====================== 4083c609719bSwdenk 4084c609719bSwdenkU-Boot supports user configuration using Environment Variables which 4085c609719bSwdenkcan be made persistent by saving to Flash memory. 4086c609719bSwdenk 4087c609719bSwdenkEnvironment Variables are set using "setenv", printed using 4088c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 4089c609719bSwdenkwithout a value can be used to delete a variable from the 4090c609719bSwdenkenvironment. As long as you don't save the environment you are 4091c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 4092c609719bSwdenkenvironment is erased by accident, a default environment is provided. 4093c609719bSwdenk 4094c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 4095c96f86eeSWolfgang Denk 4096c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 4097c609719bSwdenk 4098c609719bSwdenk baudrate - see CONFIG_BAUDRATE 4099c609719bSwdenk 4100c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 4101c609719bSwdenk 4102c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 4103c609719bSwdenk 4104c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 4105c609719bSwdenk 4106c609719bSwdenk bootfile - Name of the image to load with TFTP 4107c609719bSwdenk 41087d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 41097d721e34SBartlomiej Sieka command can be restricted. This variable is given as 41107d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 41117d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 41127d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 41137d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 4114c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 4115c3624e6eSGrant Likely bootm_mapsize. 4116c3624e6eSGrant Likely 4117c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 4118c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 4119c3624e6eSGrant Likely defines the size of the memory region starting at base 4120c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 4121c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 4122c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 4123c3624e6eSGrant Likely used otherwise. 41247d721e34SBartlomiej Sieka 41257d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 41267d721e34SBartlomiej Sieka command can be restricted. This variable is given as 41277d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 41287d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 41297d721e34SBartlomiej Sieka environment variable. 41307d721e34SBartlomiej Sieka 41314bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 41324bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 41334bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 41344bae9090SBartlomiej Sieka 4135c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 4136c609719bSwdenk "bootp" will just load perform a lookup of the 4137c609719bSwdenk configuration from the BOOTP server, but not try to 4138c609719bSwdenk load any image using TFTP 4139c609719bSwdenk 4140c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 4141c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 4142c609719bSwdenk be automatically started (by internally calling 4143c609719bSwdenk "bootm") 4144c609719bSwdenk 41454a6fd34bSwdenk If set to "no", a standalone image passed to the 41464a6fd34bSwdenk "bootm" command will be copied to the load address 41474a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 41484a6fd34bSwdenk This can be used to load and uncompress arbitrary 41494a6fd34bSwdenk data. 41504a6fd34bSwdenk 4151a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 4152a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 4153fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 4154fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 4155fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 4156fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 4157fa34f6b2SShawn Guo device tree blob be copied to the maximum address 4158fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 4159fa34f6b2SShawn Guo access it during the boot procedure. 4160fa34f6b2SShawn Guo 4161a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 4162a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 4163a28afca5SDavid A. Long to work it must reside in writable memory, have 4164a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 4165a28afca5SDavid A. Long add the information it needs into it, and the memory 4166a28afca5SDavid A. Long must be accessible by the kernel. 4167a28afca5SDavid A. Long 4168eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 4169eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 4170eea63e05SSimon Glass defined. 4171eea63e05SSimon Glass 417217ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 417317ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 417417ea1177Swdenk mode (400kHZ). This environment variable is used in 417517ea1177Swdenk initialization code. So, for changes to be effective 417617ea1177Swdenk it must be saved and board must be reset. 417717ea1177Swdenk 4178c609719bSwdenk initrd_high - restrict positioning of initrd images: 4179c609719bSwdenk If this variable is not set, initrd images will be 4180c609719bSwdenk copied to the highest possible address in RAM; this 4181c609719bSwdenk is usually what you want since it allows for 4182c609719bSwdenk maximum initrd size. If for some reason you want to 4183c609719bSwdenk make sure that the initrd image is loaded below the 41846d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 4185c609719bSwdenk variable to a value of "no" or "off" or "0". 4186c609719bSwdenk Alternatively, you can set it to a maximum upper 4187c609719bSwdenk address to use (U-Boot will still check that it 4188c609719bSwdenk does not overwrite the U-Boot stack and data). 4189c609719bSwdenk 4190c609719bSwdenk For instance, when you have a system with 16 MB 41917152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 4192c609719bSwdenk you can do this by adding "mem=12M" to the value of 4193c609719bSwdenk the "bootargs" variable. However, now you must make 41947152b1d0Swdenk sure that the initrd image is placed in the first 4195c609719bSwdenk 12 MB as well - this can be done with 4196c609719bSwdenk 4197c609719bSwdenk setenv initrd_high 00c00000 4198c609719bSwdenk 419938b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 420038b99261Swdenk indication to U-Boot that all addresses are legal 420138b99261Swdenk for the Linux kernel, including addresses in flash 420238b99261Swdenk memory. In this case U-Boot will NOT COPY the 420338b99261Swdenk ramdisk at all. This may be useful to reduce the 420438b99261Swdenk boot time on your system, but requires that this 420538b99261Swdenk feature is supported by your Linux kernel. 420638b99261Swdenk 4207c609719bSwdenk ipaddr - IP address; needed for tftpboot command 4208c609719bSwdenk 4209c609719bSwdenk loadaddr - Default load address for commands like "bootp", 4210dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 4211c609719bSwdenk 4212c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 4213c609719bSwdenk 4214c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 4215c609719bSwdenk 4216c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 4217c609719bSwdenk 4218c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 4219c609719bSwdenk 4220c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 4221c609719bSwdenk 4222e2a53458SMike Frysinger ethprime - controls which interface is used first. 4223a3d991bdSwdenk 4224e2a53458SMike Frysinger ethact - controls which interface is currently active. 4225e2a53458SMike Frysinger For example you can do the following 4226a3d991bdSwdenk 422748690d80SHeiko Schocher => setenv ethact FEC 422848690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 422948690d80SHeiko Schocher => setenv ethact SCC 423048690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 4231a3d991bdSwdenk 4232e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 4233e1692577SMatthias Fuchs available network interfaces. 4234e1692577SMatthias Fuchs It just stays at the currently selected interface. 4235e1692577SMatthias Fuchs 4236a3d991bdSwdenk netretry - When set to "no" each network operation will 4237a3d991bdSwdenk either succeed or fail without retrying. 42386e592385Swdenk When set to "once" the network operation will 42396e592385Swdenk fail when all the available network interfaces 42406e592385Swdenk are tried once without success. 4241a3d991bdSwdenk Useful on scripts which control the retry operation 4242a3d991bdSwdenk themselves. 4243a3d991bdSwdenk 4244b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 4245a1cf027aSJean-Christophe PLAGNIOL-VILLARD 424628cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 4247ecb0ccd9SWolfgang Denk UDP source port. 4248ecb0ccd9SWolfgang Denk 424928cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 425028cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 425128cb9375SWolfgang Denk 4252c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 4253c96f86eeSWolfgang Denk we use the TFTP server's default block size 4254c96f86eeSWolfgang Denk 4255c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 4256c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 4257c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 4258c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 4259c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 4260c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 4261c96f86eeSWolfgang Denk with unreliable TFTP servers. 4262c96f86eeSWolfgang Denk 4263a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 426411ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 4265a3d991bdSwdenk VLAN tagged frames. 4266c609719bSwdenk 4267dc0b7b0eSJason HobbsThe following image location variables contain the location of images 4268dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 4269dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 4270dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 4271dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 4272dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 4273dc0b7b0eSJason Hobbsflash or offset in NAND flash. 4274dc0b7b0eSJason Hobbs 4275dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 4276dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 4277dc0b7b0eSJason Hobbsboards use these variables for other purposes. 4278dc0b7b0eSJason Hobbs 4279dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 4280dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 4281dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 4282dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 4283dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 4284dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 4285dc0b7b0eSJason Hobbs 4286c609719bSwdenkThe following environment variables may be used and automatically 4287c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 4288c609719bSwdenkdepending the information provided by your boot server: 4289c609719bSwdenk 4290c609719bSwdenk bootfile - see above 4291c609719bSwdenk dnsip - IP address of your Domain Name Server 4292fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 4293c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 4294c609719bSwdenk hostname - Target hostname 4295c609719bSwdenk ipaddr - see above 4296c609719bSwdenk netmask - Subnet Mask 4297c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 4298c609719bSwdenk serverip - see above 4299c609719bSwdenk 4300c609719bSwdenk 4301c609719bSwdenkThere are two special Environment Variables: 4302c609719bSwdenk 4303c609719bSwdenk serial# - contains hardware identification information such 4304c609719bSwdenk as type string and/or serial number 4305c609719bSwdenk ethaddr - Ethernet address 4306c609719bSwdenk 4307c609719bSwdenkThese variables can be set only once (usually during manufacturing of 4308c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 4309c609719bSwdenkonce they have been set once. 4310c609719bSwdenk 4311c609719bSwdenk 4312c1551ea8SstroeseFurther special Environment Variables: 4313c1551ea8Sstroese 4314c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4315c1551ea8Sstroese with the "version" command. This variable is 4316c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4317c1551ea8Sstroese 4318c1551ea8Sstroese 4319c609719bSwdenkPlease note that changes to some configuration parameters may take 4320c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4321c609719bSwdenk 4322c609719bSwdenk 4323170ab110SJoe HershbergerCallback functions for environment variables: 4324170ab110SJoe Hershberger--------------------------------------------- 4325170ab110SJoe Hershberger 4326170ab110SJoe HershbergerFor some environment variables, the behavior of u-boot needs to change 4327170ab110SJoe Hershbergerwhen their values are changed. This functionailty allows functions to 4328170ab110SJoe Hershbergerbe associated with arbitrary variables. On creation, overwrite, or 4329170ab110SJoe Hershbergerdeletion, the callback will provide the opportunity for some side 4330170ab110SJoe Hershbergereffect to happen or for the change to be rejected. 4331170ab110SJoe Hershberger 4332170ab110SJoe HershbergerThe callbacks are named and associated with a function using the 4333170ab110SJoe HershbergerU_BOOT_ENV_CALLBACK macro in your board or driver code. 4334170ab110SJoe Hershberger 4335170ab110SJoe HershbergerThese callbacks are associated with variables in one of two ways. The 4336170ab110SJoe Hershbergerstatic list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC 4337170ab110SJoe Hershbergerin the board configuration to a string that defines a list of 4338170ab110SJoe Hershbergerassociations. The list must be in the following format: 4339170ab110SJoe Hershberger 4340170ab110SJoe Hershberger entry = variable_name[:callback_name] 4341170ab110SJoe Hershberger list = entry[,list] 4342170ab110SJoe Hershberger 4343170ab110SJoe HershbergerIf the callback name is not specified, then the callback is deleted. 4344170ab110SJoe HershbergerSpaces are also allowed anywhere in the list. 4345170ab110SJoe Hershberger 4346170ab110SJoe HershbergerCallbacks can also be associated by defining the ".callbacks" variable 4347170ab110SJoe Hershbergerwith the same list format above. Any association in ".callbacks" will 4348170ab110SJoe Hershbergeroverride any association in the static list. You can define 4349170ab110SJoe HershbergerCONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the 4350170ab110SJoe Hershberger".callbacks" envirnoment variable in the default or embedded environment. 4351170ab110SJoe Hershberger 4352170ab110SJoe Hershberger 4353f07771ccSwdenkCommand Line Parsing: 4354f07771ccSwdenk===================== 4355f07771ccSwdenk 4356f07771ccSwdenkThere are two different command line parsers available with U-Boot: 43577152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4358f07771ccSwdenk 4359f07771ccSwdenkOld, simple command line parser: 4360f07771ccSwdenk-------------------------------- 4361f07771ccSwdenk 4362f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4363f07771ccSwdenk- several commands on one line, separated by ';' 4364fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4365f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4366f07771ccSwdenk for example: 4367fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4368f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4369f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4370f07771ccSwdenk 4371f07771ccSwdenkHush shell: 4372f07771ccSwdenk----------- 4373f07771ccSwdenk 4374f07771ccSwdenk- similar to Bourne shell, with control structures like 4375f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4376f07771ccSwdenk until...do...done, ... 4377f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4378f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4379f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4380f07771ccSwdenk command 4381f07771ccSwdenk 4382f07771ccSwdenkGeneral rules: 4383f07771ccSwdenk-------------- 4384f07771ccSwdenk 4385f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4386f07771ccSwdenk command) contains several commands separated by semicolon, and 4387f07771ccSwdenk one of these commands fails, then the remaining commands will be 4388f07771ccSwdenk executed anyway. 4389f07771ccSwdenk 4390f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 439111ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4392f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4393f07771ccSwdenk variables are not executed. 4394f07771ccSwdenk 4395c609719bSwdenkNote for Redundant Ethernet Interfaces: 4396c609719bSwdenk======================================= 4397c609719bSwdenk 439811ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4399c609719bSwdenksuch configurations and is capable of automatic selection of a 44007152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4401c609719bSwdenk 4402c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4403c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4404c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4405c609719bSwdenk 4406c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4407c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4408c609719bSwdenkding setting in the environment; if the corresponding environment 4409c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4410c609719bSwdenk 4411c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4412c609719bSwdenk environment, the SROM's address is used. 4413c609719bSwdenk 4414c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4415c609719bSwdenk environment exists, then the value from the environment variable is 4416c609719bSwdenk used. 4417c609719bSwdenk 4418c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4419c609719bSwdenk both addresses are the same, this MAC address is used. 4420c609719bSwdenk 4421c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4422c609719bSwdenk addresses differ, the value from the environment is used and a 4423c609719bSwdenk warning is printed. 4424c609719bSwdenk 4425c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4426c609719bSwdenk is raised. 4427c609719bSwdenk 4428ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4429ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4430ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4431ecee9324SBen WarrenThe naming convention is as follows: 4432ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4433c609719bSwdenk 4434c609719bSwdenkImage Formats: 4435c609719bSwdenk============== 4436c609719bSwdenk 44373310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 44383310c549SMarian Balakowiczimages in two formats: 44393310c549SMarian Balakowicz 44403310c549SMarian BalakowiczNew uImage format (FIT) 44413310c549SMarian Balakowicz----------------------- 44423310c549SMarian Balakowicz 44433310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 44443310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 44453310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 44463310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 44473310c549SMarian Balakowicz 44483310c549SMarian Balakowicz 44493310c549SMarian BalakowiczOld uImage format 44503310c549SMarian Balakowicz----------------- 44513310c549SMarian Balakowicz 44523310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 44533310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 44543310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4455c609719bSwdenk 4456c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4457c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4458f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4459f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4460f5ed9e39SPeter Tyser INTEGRITY). 44617b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4462afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4463afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4464c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4465c609719bSwdenk* Load Address 4466c609719bSwdenk* Entry Point 4467c609719bSwdenk* Image Name 4468c609719bSwdenk* Image Timestamp 4469c609719bSwdenk 4470c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4471c609719bSwdenkand the data portions of the image are secured against corruption by 4472c609719bSwdenkCRC32 checksums. 4473c609719bSwdenk 4474c609719bSwdenk 4475c609719bSwdenkLinux Support: 4476c609719bSwdenk============== 4477c609719bSwdenk 4478c609719bSwdenkAlthough U-Boot should support any OS or standalone application 44797152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4480c609719bSwdenkU-Boot. 4481c609719bSwdenk 4482c609719bSwdenkU-Boot includes many features that so far have been part of some 4483c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4484c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4485c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 44867152b1d0Swdenkserves several purposes: 4487c609719bSwdenk 4488c609719bSwdenk- the same features can be used for other OS or standalone 4489c609719bSwdenk applications (for instance: using compressed images to reduce the 4490c609719bSwdenk Flash memory footprint) 4491c609719bSwdenk 4492c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 44937152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4494c609719bSwdenk 4495c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4496c609719bSwdenk images; of course this also means that different kernel images can 4497c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4498c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4499c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4500c609719bSwdenk software is easier now. 4501c609719bSwdenk 4502c609719bSwdenk 4503c609719bSwdenkLinux HOWTO: 4504c609719bSwdenk============ 4505c609719bSwdenk 4506c609719bSwdenkPorting Linux to U-Boot based systems: 4507c609719bSwdenk--------------------------------------- 4508c609719bSwdenk 4509c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4510c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4511c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4512c609719bSwdenkLinux :-). 4513c609719bSwdenk 4514a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4515c609719bSwdenk 4516c609719bSwdenkJust make sure your machine specific header file (for instance 4517c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 45181dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 45191dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 45206d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4521c609719bSwdenk 4522c609719bSwdenk 4523c609719bSwdenkConfiguring the Linux kernel: 4524c609719bSwdenk----------------------------- 4525c609719bSwdenk 4526c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4527c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4528c609719bSwdenk 4529c609719bSwdenk 4530c609719bSwdenkBuilding a Linux Image: 4531c609719bSwdenk----------------------- 4532c609719bSwdenk 453324ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 453424ee89b9Swdenknot used. If you use recent kernel source, a new build target 453524ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 453624ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 453724ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 453824ee89b9Swdenk100% compatible format. 4539c609719bSwdenk 4540c609719bSwdenkExample: 4541c609719bSwdenk 4542c609719bSwdenk make TQM850L_config 4543c609719bSwdenk make oldconfig 4544c609719bSwdenk make dep 454524ee89b9Swdenk make uImage 4546c609719bSwdenk 454724ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 454824ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 454924ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4550c609719bSwdenk 455124ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 455224ee89b9Swdenk 455324ee89b9Swdenk* convert the kernel into a raw binary image: 455424ee89b9Swdenk 455524ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 455624ee89b9Swdenk -R .note -R .comment \ 455724ee89b9Swdenk -S vmlinux linux.bin 455824ee89b9Swdenk 455924ee89b9Swdenk* compress the binary image: 456024ee89b9Swdenk 456124ee89b9Swdenk gzip -9 linux.bin 456224ee89b9Swdenk 456324ee89b9Swdenk* package compressed binary image for U-Boot: 456424ee89b9Swdenk 456524ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 456624ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 456724ee89b9Swdenk -d linux.bin.gz uImage 456824ee89b9Swdenk 456924ee89b9Swdenk 457024ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 457124ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 457224ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 457324ee89b9Swdenkbyte header containing information about target architecture, 457424ee89b9Swdenkoperating system, image type, compression method, entry points, time 457524ee89b9Swdenkstamp, CRC32 checksums, etc. 457624ee89b9Swdenk 457724ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 457824ee89b9Swdenkprint the header information, or to build new images. 4579c609719bSwdenk 4580c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4581c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4582c609719bSwdenkchecksum verification: 4583c609719bSwdenk 4584c609719bSwdenk tools/mkimage -l image 4585c609719bSwdenk -l ==> list image header information 4586c609719bSwdenk 4587c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4588c609719bSwdenkfrom a "data file" which is used as image payload: 4589c609719bSwdenk 4590c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4591c609719bSwdenk -n name -d data_file image 4592c609719bSwdenk -A ==> set architecture to 'arch' 4593c609719bSwdenk -O ==> set operating system to 'os' 4594c609719bSwdenk -T ==> set image type to 'type' 4595c609719bSwdenk -C ==> set compression type 'comp' 4596c609719bSwdenk -a ==> set load address to 'addr' (hex) 4597c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4598c609719bSwdenk -n ==> set image name to 'name' 4599c609719bSwdenk -d ==> use image data from 'datafile' 4600c609719bSwdenk 460169459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 460269459791Swdenkaddress (0x00000000), but the entry point address depends on the 460369459791Swdenkkernel version: 4604c609719bSwdenk 4605c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 460624ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4607c609719bSwdenk 4608c609719bSwdenkSo a typical call to build a U-Boot image would read: 4609c609719bSwdenk 461024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 461124ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4612a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 461324ee89b9Swdenk > examples/uImage.TQM850L 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 (gzip compressed) 4617c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4618c609719bSwdenk Load Address: 0x00000000 461924ee89b9Swdenk Entry Point: 0x00000000 4620c609719bSwdenk 4621c609719bSwdenkTo verify the contents of the image (or check for corruption): 4622c609719bSwdenk 462324ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 462424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4625c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4626c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4627c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4628c609719bSwdenk Load Address: 0x00000000 462924ee89b9Swdenk Entry Point: 0x00000000 4630c609719bSwdenk 4631c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4632c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4633c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4634c609719bSwdenkneed to be uncompressed: 4635c609719bSwdenk 4636a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 463724ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 463824ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4639a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 464024ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 464124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4642c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4643c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4644c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4645c609719bSwdenk Load Address: 0x00000000 464624ee89b9Swdenk Entry Point: 0x00000000 4647c609719bSwdenk 4648c609719bSwdenk 4649c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4650c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4651c609719bSwdenk 4652c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4653c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4654c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4655c609719bSwdenk Image Name: Simple Ramdisk Image 4656c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4657c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4658c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4659c609719bSwdenk Load Address: 0x00000000 4660c609719bSwdenk Entry Point: 0x00000000 4661c609719bSwdenk 4662c609719bSwdenk 4663c609719bSwdenkInstalling a Linux Image: 4664c609719bSwdenk------------------------- 4665c609719bSwdenk 4666c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4667c609719bSwdenkyou must convert the image to S-Record format: 4668c609719bSwdenk 4669c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4670c609719bSwdenk 4671c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4672c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4673c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4674c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4675c609719bSwdenkcommand. 4676c609719bSwdenk 4677c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4678c609719bSwdenkTQM8xxL is in the first Flash bank): 4679c609719bSwdenk 4680c609719bSwdenk => erase 40100000 401FFFFF 4681c609719bSwdenk 4682c609719bSwdenk .......... done 4683c609719bSwdenk Erased 8 sectors 4684c609719bSwdenk 4685c609719bSwdenk => loads 40100000 4686c609719bSwdenk ## Ready for S-Record download ... 4687c609719bSwdenk ~>examples/image.srec 4688c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4689c609719bSwdenk ... 4690c609719bSwdenk 15989 15990 15991 15992 4691c609719bSwdenk [file transfer complete] 4692c609719bSwdenk [connected] 4693c609719bSwdenk ## Start Addr = 0x00000000 4694c609719bSwdenk 4695c609719bSwdenk 4696c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4697c609719bSwdenkthis includes a checksum verification so you can be sure no data 4698c609719bSwdenkcorruption happened: 4699c609719bSwdenk 4700c609719bSwdenk => imi 40100000 4701c609719bSwdenk 4702c609719bSwdenk ## Checking Image at 40100000 ... 4703c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4704c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4705c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4706c609719bSwdenk Load Address: 00000000 4707c609719bSwdenk Entry Point: 0000000c 4708c609719bSwdenk Verifying Checksum ... OK 4709c609719bSwdenk 4710c609719bSwdenk 4711c609719bSwdenkBoot Linux: 4712c609719bSwdenk----------- 4713c609719bSwdenk 4714c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4715c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4716c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4717c609719bSwdenkparameters. You can check and modify this variable using the 4718c609719bSwdenk"printenv" and "setenv" commands: 4719c609719bSwdenk 4720c609719bSwdenk 4721c609719bSwdenk => printenv bootargs 4722c609719bSwdenk bootargs=root=/dev/ram 4723c609719bSwdenk 4724c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4725c609719bSwdenk 4726c609719bSwdenk => printenv bootargs 4727c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4728c609719bSwdenk 4729c609719bSwdenk => bootm 40020000 4730c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4731c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4732c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4733c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4734c609719bSwdenk Load Address: 00000000 4735c609719bSwdenk Entry Point: 0000000c 4736c609719bSwdenk Verifying Checksum ... OK 4737c609719bSwdenk Uncompressing Kernel Image ... OK 4738c609719bSwdenk 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 4739c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4740c609719bSwdenk time_init: decrementer frequency = 187500000/60 4741c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4742c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4743c609719bSwdenk ... 4744c609719bSwdenk 474511ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 47467152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4747c609719bSwdenkformat!) to the "bootm" command: 4748c609719bSwdenk 4749c609719bSwdenk => imi 40100000 40200000 4750c609719bSwdenk 4751c609719bSwdenk ## Checking Image at 40100000 ... 4752c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4753c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4754c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4755c609719bSwdenk Load Address: 00000000 4756c609719bSwdenk Entry Point: 0000000c 4757c609719bSwdenk Verifying Checksum ... OK 4758c609719bSwdenk 4759c609719bSwdenk ## Checking Image at 40200000 ... 4760c609719bSwdenk Image Name: Simple Ramdisk Image 4761c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4762c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4763c609719bSwdenk Load Address: 00000000 4764c609719bSwdenk Entry Point: 00000000 4765c609719bSwdenk Verifying Checksum ... OK 4766c609719bSwdenk 4767c609719bSwdenk => bootm 40100000 40200000 4768c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4769c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4770c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4771c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4772c609719bSwdenk Load Address: 00000000 4773c609719bSwdenk Entry Point: 0000000c 4774c609719bSwdenk Verifying Checksum ... OK 4775c609719bSwdenk Uncompressing Kernel Image ... OK 4776c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4777c609719bSwdenk Image Name: Simple Ramdisk Image 4778c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4779c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4780c609719bSwdenk Load Address: 00000000 4781c609719bSwdenk Entry Point: 00000000 4782c609719bSwdenk Verifying Checksum ... OK 4783c609719bSwdenk Loading Ramdisk ... OK 4784c609719bSwdenk 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 4785c609719bSwdenk Boot arguments: root=/dev/ram 4786c609719bSwdenk time_init: decrementer frequency = 187500000/60 4787c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4788c609719bSwdenk ... 4789c609719bSwdenk RAMDISK: Compressed image found at block 0 4790c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4791c609719bSwdenk 4792c609719bSwdenk bash# 4793c609719bSwdenk 47940267768eSMatthew McClintockBoot Linux and pass a flat device tree: 47950267768eSMatthew McClintock----------- 47960267768eSMatthew McClintock 47970267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 47980267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 47990267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 48000267768eSMatthew McClintockflat device tree: 48010267768eSMatthew McClintock 48020267768eSMatthew McClintock=> print oftaddr 48030267768eSMatthew McClintockoftaddr=0x300000 48040267768eSMatthew McClintock=> print oft 48050267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 48060267768eSMatthew McClintock=> tftp $oftaddr $oft 48070267768eSMatthew McClintockSpeed: 1000, full duplex 48080267768eSMatthew McClintockUsing TSEC0 device 48090267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 48100267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 48110267768eSMatthew McClintockLoad address: 0x300000 48120267768eSMatthew McClintockLoading: # 48130267768eSMatthew McClintockdone 48140267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 48150267768eSMatthew McClintock=> tftp $loadaddr $bootfile 48160267768eSMatthew McClintockSpeed: 1000, full duplex 48170267768eSMatthew McClintockUsing TSEC0 device 48180267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 48190267768eSMatthew McClintockFilename 'uImage'. 48200267768eSMatthew McClintockLoad address: 0x200000 48210267768eSMatthew McClintockLoading:############ 48220267768eSMatthew McClintockdone 48230267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 48240267768eSMatthew McClintock=> print loadaddr 48250267768eSMatthew McClintockloadaddr=200000 48260267768eSMatthew McClintock=> print oftaddr 48270267768eSMatthew McClintockoftaddr=0x300000 48280267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 48290267768eSMatthew McClintock## Booting image at 00200000 ... 48300267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 48310267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 48320267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 48330267768eSMatthew McClintock Load Address: 00000000 48340267768eSMatthew McClintock Entry Point: 00000000 48350267768eSMatthew McClintock Verifying Checksum ... OK 48360267768eSMatthew McClintock Uncompressing Kernel Image ... OK 48370267768eSMatthew McClintockBooting using flat device tree at 0x300000 48380267768eSMatthew McClintockUsing MPC85xx ADS machine description 48390267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 48400267768eSMatthew McClintock[snip] 48410267768eSMatthew McClintock 48420267768eSMatthew McClintock 48436069ff26SwdenkMore About U-Boot Image Types: 48446069ff26Swdenk------------------------------ 48456069ff26Swdenk 48466069ff26SwdenkU-Boot supports the following image types: 48476069ff26Swdenk 48486069ff26Swdenk "Standalone Programs" are directly runnable in the environment 48496069ff26Swdenk provided by U-Boot; it is expected that (if they behave 48506069ff26Swdenk well) you can continue to work in U-Boot after return from 48516069ff26Swdenk the Standalone Program. 48526069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 48536069ff26Swdenk will take over control completely. Usually these programs 48546069ff26Swdenk will install their own set of exception handlers, device 48556069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 48566069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 48576069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 48586069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 48596069ff26Swdenk being started. 48606069ff26Swdenk "Multi-File Images" contain several images, typically an OS 48616069ff26Swdenk (Linux) kernel image and one or more data images like 48626069ff26Swdenk RAMDisks. This construct is useful for instance when you want 48636069ff26Swdenk to boot over the network using BOOTP etc., where the boot 48646069ff26Swdenk server provides just a single image file, but you want to get 48656069ff26Swdenk for instance an OS kernel and a RAMDisk image. 48666069ff26Swdenk 48676069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 48686069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 48696069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 48706069ff26Swdenk Immediately after the terminating 0 follow the images, one by 48716069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 48726069ff26Swdenk a multiple of 4 bytes). 48736069ff26Swdenk 48746069ff26Swdenk "Firmware Images" are binary images containing firmware (like 48756069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 48766069ff26Swdenk flash memory. 48776069ff26Swdenk 48786069ff26Swdenk "Script files" are command sequences that will be executed by 48796069ff26Swdenk U-Boot's command interpreter; this feature is especially 48806069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 48816069ff26Swdenk as command interpreter. 48826069ff26Swdenk 488344f074c7SMarek VasutBooting the Linux zImage: 488444f074c7SMarek Vasut------------------------- 488544f074c7SMarek Vasut 488644f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 488744f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 488844f074c7SMarek Vasutas the syntax of "bootm" command. 488944f074c7SMarek Vasut 4890017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4891017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4892017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4893017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4894017e1f3fSMarek Vasut 4895c609719bSwdenk 4896c609719bSwdenkStandalone HOWTO: 4897c609719bSwdenk================= 4898c609719bSwdenk 4899c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4900c609719bSwdenkrun "standalone" applications, which can use some resources of 4901c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4902c609719bSwdenk 4903c609719bSwdenkTwo simple examples are included with the sources: 4904c609719bSwdenk 4905c609719bSwdenk"Hello World" Demo: 4906c609719bSwdenk------------------- 4907c609719bSwdenk 4908c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4909c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4910c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4911c609719bSwdenklike that: 4912c609719bSwdenk 4913c609719bSwdenk => loads 4914c609719bSwdenk ## Ready for S-Record download ... 4915c609719bSwdenk ~>examples/hello_world.srec 4916c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4917c609719bSwdenk [file transfer complete] 4918c609719bSwdenk [connected] 4919c609719bSwdenk ## Start Addr = 0x00040004 4920c609719bSwdenk 4921c609719bSwdenk => go 40004 Hello World! This is a test. 4922c609719bSwdenk ## Starting application at 0x00040004 ... 4923c609719bSwdenk Hello World 4924c609719bSwdenk argc = 7 4925c609719bSwdenk argv[0] = "40004" 4926c609719bSwdenk argv[1] = "Hello" 4927c609719bSwdenk argv[2] = "World!" 4928c609719bSwdenk argv[3] = "This" 4929c609719bSwdenk argv[4] = "is" 4930c609719bSwdenk argv[5] = "a" 4931c609719bSwdenk argv[6] = "test." 4932c609719bSwdenk argv[7] = "<NULL>" 4933c609719bSwdenk Hit any key to exit ... 4934c609719bSwdenk 4935c609719bSwdenk ## Application terminated, rc = 0x0 4936c609719bSwdenk 4937c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4938c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4939c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4940c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4941c609719bSwdenkcharacter, but this is just a demo program. The application can be 4942c609719bSwdenkcontrolled by the following keys: 4943c609719bSwdenk 4944c609719bSwdenk ? - print current values og the CPM Timer registers 4945c609719bSwdenk b - enable interrupts and start timer 4946c609719bSwdenk e - stop timer and disable interrupts 4947c609719bSwdenk q - quit application 4948c609719bSwdenk 4949c609719bSwdenk => loads 4950c609719bSwdenk ## Ready for S-Record download ... 4951c609719bSwdenk ~>examples/timer.srec 4952c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4953c609719bSwdenk [file transfer complete] 4954c609719bSwdenk [connected] 4955c609719bSwdenk ## Start Addr = 0x00040004 4956c609719bSwdenk 4957c609719bSwdenk => go 40004 4958c609719bSwdenk ## Starting application at 0x00040004 ... 4959c609719bSwdenk TIMERS=0xfff00980 4960c609719bSwdenk Using timer 1 4961c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4962c609719bSwdenk 4963c609719bSwdenkHit 'b': 4964c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4965c609719bSwdenk Enabling timer 4966c609719bSwdenkHit '?': 4967c609719bSwdenk [q, b, e, ?] ........ 4968c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4969c609719bSwdenkHit '?': 4970c609719bSwdenk [q, b, e, ?] . 4971c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4972c609719bSwdenkHit '?': 4973c609719bSwdenk [q, b, e, ?] . 4974c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4975c609719bSwdenkHit '?': 4976c609719bSwdenk [q, b, e, ?] . 4977c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4978c609719bSwdenkHit 'e': 4979c609719bSwdenk [q, b, e, ?] ...Stopping timer 4980c609719bSwdenkHit 'q': 4981c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4982c609719bSwdenk 4983c609719bSwdenk 498485ec0bccSwdenkMinicom warning: 498585ec0bccSwdenk================ 498685ec0bccSwdenk 49877152b1d0SwdenkOver time, many people have reported problems when trying to use the 498885ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 498985ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4990f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 499185ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4992e53515a2SKarl O. Pincuse "cu" for S-Record download ("loads" command). See 4993e53515a2SKarl O. Pinchttp://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. 4994e53515a2SKarl O. Pincfor help with kermit. 4995e53515a2SKarl O. Pinc 499685ec0bccSwdenk 499752f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 499852f52c14Swdenkconfiguration to your "File transfer protocols" section: 499952f52c14Swdenk 500052f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 500152f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 500252f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 500352f52c14Swdenk 500452f52c14Swdenk 5005c609719bSwdenkNetBSD Notes: 5006c609719bSwdenk============= 5007c609719bSwdenk 5008c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 5009c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 5010c609719bSwdenk 5011c609719bSwdenkBuilding requires a cross environment; it is known to work on 5012c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 5013c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 5014c609719bSwdenkNote that the cross-powerpc package does not install include files; 5015c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 5016c609719bSwdenkmissing. This file has to be installed and patched manually: 5017c609719bSwdenk 5018c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 5019c609719bSwdenk # mkdir powerpc 5020c609719bSwdenk # ln -s powerpc machine 5021c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 5022c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 5023c609719bSwdenk 5024c609719bSwdenkNative builds *don't* work due to incompatibilities between native 5025c609719bSwdenkand U-Boot include files. 5026c609719bSwdenk 5027c609719bSwdenkBooting assumes that (the first part of) the image booted is a 5028c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 5029c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 5030c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 50312a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 5032c609719bSwdenk 5033c609719bSwdenk 5034c609719bSwdenkImplementation Internals: 5035c609719bSwdenk========================= 5036c609719bSwdenk 5037c609719bSwdenkThe following is not intended to be a complete description of every 5038c609719bSwdenkimplementation detail. However, it should help to understand the 5039c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 5040c609719bSwdenkhardware. 5041c609719bSwdenk 5042c609719bSwdenk 5043c609719bSwdenkInitial Stack, Global Data: 5044c609719bSwdenk--------------------------- 5045c609719bSwdenk 5046c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 5047c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 5048c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 5049c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 5050c609719bSwdenkis not initialized as zero. To be able to get a C environment working 5051c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 5052c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 5053c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 5054c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 5055c609719bSwdenklocked as (mis-) used as memory, etc. 5056c609719bSwdenk 50577152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 50580668236bSWolfgang Denk U-Boot mailing list: 505943d9616cSwdenk 506043d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 506143d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 506243d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 506343d9616cSwdenk ... 506443d9616cSwdenk 506543d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 506643d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 506743d9616cSwdenk require any physical RAM backing up the cache. The cleverness 506843d9616cSwdenk is that the cache is being used as a temporary supply of 506943d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 507011ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 507143d9616cSwdenk can see how this works by studying the cache architecture and 507243d9616cSwdenk operation in the architecture and processor-specific manuals. 507343d9616cSwdenk 507443d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 507543d9616cSwdenk is another option for the system designer to use as an 507611ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 507743d9616cSwdenk option should work for you. Using CS 4 should be fine if your 507843d9616cSwdenk board designers haven't used it for something that would 507943d9616cSwdenk cause you grief during the initial boot! It is frequently not 508043d9616cSwdenk used. 508143d9616cSwdenk 50826d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 508343d9616cSwdenk with your processor/board/system design. The default value 508443d9616cSwdenk you will find in any recent u-boot distribution in 50858a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 508643d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 508743d9616cSwdenk it above 400_0000. Just make sure your board has no resources 508843d9616cSwdenk that are supposed to respond to that address! That code in 508943d9616cSwdenk start.S has been around a while and should work as is when 509043d9616cSwdenk you get the config right. 509143d9616cSwdenk 509243d9616cSwdenk -Chris Hallinan 509343d9616cSwdenk DS4.COM, Inc. 509443d9616cSwdenk 5095c609719bSwdenkIt is essential to remember this, since it has some impact on the C 5096c609719bSwdenkcode for the initialization procedures: 5097c609719bSwdenk 5098c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 5099c609719bSwdenk to write it. 5100c609719bSwdenk 510111ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 5102c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 51037152b1d0Swdenk zation is performed later (when relocating to RAM). 5104c609719bSwdenk 5105c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 5106c609719bSwdenk that. 5107c609719bSwdenk 5108c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 5109c609719bSwdenknormal global data to share information beween the code. But it 5110c609719bSwdenkturned out that the implementation of U-Boot can be greatly 5111c609719bSwdenksimplified by making a global data structure (gd_t) available to all 5112c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 5113c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 5114c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 5115c609719bSwdenkplace a pointer (gd) to the global data into a register which we 5116c609719bSwdenkreserve for this purpose. 5117c609719bSwdenk 51187152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 5119c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 5120c609719bSwdenkGCC's implementation. 5121c609719bSwdenk 5122c609719bSwdenkFor PowerPC, the following registers have specific use: 5123c609719bSwdenk R1: stack pointer 5124e7670f6cSWolfgang Denk R2: reserved for system use 5125c609719bSwdenk R3-R4: parameter passing and return values 5126c609719bSwdenk R5-R10: parameter passing 5127c609719bSwdenk R13: small data area pointer 5128c609719bSwdenk R30: GOT pointer 5129c609719bSwdenk R31: frame pointer 5130c609719bSwdenk 5131e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 5132e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 5133e6bee808SJoakim Tjernlund going back and forth between asm and C) 5134c609719bSwdenk 5135e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 5136c609719bSwdenk 5137c609719bSwdenk Note: on PPC, we could use a static initializer (since the 5138c609719bSwdenk address of the global data structure is known at compile time), 5139c609719bSwdenk but it turned out that reserving a register results in somewhat 5140c609719bSwdenk smaller code - although the code savings are not that big (on 5141c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 5142c609719bSwdenk 624 text + 127 data). 5143c609719bSwdenk 5144c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 51454c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 51464c58eb55SMike Frysinger 5147c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 51484c58eb55SMike Frysinger 5149c609719bSwdenkOn ARM, the following registers are used: 5150c609719bSwdenk 5151c609719bSwdenk R0: function argument word/integer result 5152c609719bSwdenk R1-R3: function argument word 5153c609719bSwdenk R9: GOT pointer 5154c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 5155c609719bSwdenk R11: argument (frame) pointer 5156c609719bSwdenk R12: temporary workspace 5157c609719bSwdenk R13: stack pointer 5158c609719bSwdenk R14: link register 5159c609719bSwdenk R15: program counter 5160c609719bSwdenk 5161c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 5162c609719bSwdenk 51630df01fd3SThomas ChouOn Nios II, the ABI is documented here: 51640df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 51650df01fd3SThomas Chou 51660df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 51670df01fd3SThomas Chou 51680df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 51690df01fd3SThomas Chou to access small data sections, so gp is free. 51700df01fd3SThomas Chou 5171afc1ce82SMacpaul LinOn NDS32, the following registers are used: 5172afc1ce82SMacpaul Lin 5173afc1ce82SMacpaul Lin R0-R1: argument/return 5174afc1ce82SMacpaul Lin R2-R5: argument 5175afc1ce82SMacpaul Lin R15: temporary register for assembler 5176afc1ce82SMacpaul Lin R16: trampoline register 5177afc1ce82SMacpaul Lin R28: frame pointer (FP) 5178afc1ce82SMacpaul Lin R29: global pointer (GP) 5179afc1ce82SMacpaul Lin R30: link register (LP) 5180afc1ce82SMacpaul Lin R31: stack pointer (SP) 5181afc1ce82SMacpaul Lin PC: program counter (PC) 5182afc1ce82SMacpaul Lin 5183afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 5184afc1ce82SMacpaul Lin 5185d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 5186d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 5187c609719bSwdenk 5188c609719bSwdenkMemory Management: 5189c609719bSwdenk------------------ 5190c609719bSwdenk 5191c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 5192c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 5193c609719bSwdenk 5194c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 5195c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 5196c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 5197c609719bSwdenkphysical memory banks. 5198c609719bSwdenk 5199c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 5200c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 5201c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 5202c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 52036d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 5204c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 5205c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 5206c609719bSwdenk 5207c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 5208c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 5209c609719bSwdenk 5210c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 5211c609719bSwdenkthis: 5212c609719bSwdenk 5213c609719bSwdenk 0x0000 0000 Exception Vector code 5214c609719bSwdenk : 5215c609719bSwdenk 0x0000 1FFF 5216c609719bSwdenk 0x0000 2000 Free for Application Use 5217c609719bSwdenk : 5218c609719bSwdenk : 5219c609719bSwdenk 5220c609719bSwdenk : 5221c609719bSwdenk : 5222c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 5223c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 5224c609719bSwdenk 0x00FC 0000 Malloc Arena 5225c609719bSwdenk : 5226c609719bSwdenk 0x00FD FFFF 5227c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 5228c609719bSwdenk ... eventually: LCD or video framebuffer 5229c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 5230c609719bSwdenk 0x00FF FFFF [End of RAM] 5231c609719bSwdenk 5232c609719bSwdenk 5233c609719bSwdenkSystem Initialization: 5234c609719bSwdenk---------------------- 5235c609719bSwdenk 5236c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 523711ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 5238c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 52397152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 5240c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 5241c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 5242c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 5243c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 5244c609719bSwdenkthe caches and the SIU. 5245c609719bSwdenk 5246c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 5247c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 5248c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 5249c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 5250c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 5251c609719bSwdenksimple memory test is run that determines the size of the SDRAM 5252c609719bSwdenkbanks. 5253c609719bSwdenk 5254c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 52557152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 5256c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 5257c609719bSwdenk0x00000000, with any additional banks following immediately to create 5258c609719bSwdenkcontiguous memory starting from 0. 5259c609719bSwdenk 5260c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 5261c609719bSwdenkand allocates memory for use by malloc() and for the global Board 5262c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 5263c609719bSwdenkpages, and the final stack is set up. 5264c609719bSwdenk 5265c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 5266c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 5267c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 5268c609719bSwdenknew address in RAM. 5269c609719bSwdenk 5270c609719bSwdenk 5271c609719bSwdenkU-Boot Porting Guide: 5272c609719bSwdenk---------------------- 5273c609719bSwdenk 5274c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 52756aff3115Swdenklist, October 2002] 5276c609719bSwdenk 5277c609719bSwdenk 5278c609719bSwdenkint main(int argc, char *argv[]) 5279c609719bSwdenk{ 5280c609719bSwdenk sighandler_t no_more_time; 5281c609719bSwdenk 5282c609719bSwdenk signal(SIGALRM, no_more_time); 5283c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 5284c609719bSwdenk 5285c609719bSwdenk if (available_money > available_manpower) { 52866c3fef28SJerry Van Baren Pay consultant to port U-Boot; 5287c609719bSwdenk return 0; 5288c609719bSwdenk } 5289c609719bSwdenk 5290c609719bSwdenk Download latest U-Boot source; 5291c609719bSwdenk 52920668236bSWolfgang Denk Subscribe to u-boot mailing list; 52936aff3115Swdenk 52946c3fef28SJerry Van Baren if (clueless) 5295c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 5296c609719bSwdenk 5297c609719bSwdenk while (learning) { 5298c609719bSwdenk Read the README file in the top level directory; 52997cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 53006c3fef28SJerry Van Baren Read applicable doc/*.README; 5301c609719bSwdenk Read the source, Luke; 53026c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 5303c609719bSwdenk } 5304c609719bSwdenk 53056c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 53066c3fef28SJerry Van Baren Buy a BDI3000; 53076c3fef28SJerry Van Baren else 5308c609719bSwdenk Add a lot of aggravation and time; 5309c609719bSwdenk 53106c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 53116c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 53126c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 53136c3fef28SJerry Van Baren } else { 5314c609719bSwdenk Create your own board support subdirectory; 53156c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 53166c3fef28SJerry Van Baren } 53176c3fef28SJerry Van Baren Edit new board/<myboard> files 53186c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 5319c609719bSwdenk 53206c3fef28SJerry Van Baren while (!accepted) { 5321c609719bSwdenk while (!running) { 5322c609719bSwdenk do { 5323c609719bSwdenk Add / modify source code; 5324c609719bSwdenk } until (compiles); 5325c609719bSwdenk Debug; 5326c609719bSwdenk if (clueless) 5327c609719bSwdenk email("Hi, I am having problems..."); 5328c609719bSwdenk } 53296c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 53306c3fef28SJerry Van Baren if (reasonable critiques) 53316c3fef28SJerry Van Baren Incorporate improvements from email list code review; 53326c3fef28SJerry Van Baren else 53336c3fef28SJerry Van Baren Defend code as written; 53346c3fef28SJerry Van Baren } 5335c609719bSwdenk 5336c609719bSwdenk return 0; 5337c609719bSwdenk} 5338c609719bSwdenk 5339c609719bSwdenkvoid no_more_time (int sig) 5340c609719bSwdenk{ 5341c609719bSwdenk hire_a_guru(); 5342c609719bSwdenk} 5343c609719bSwdenk 5344c609719bSwdenk 5345c609719bSwdenkCoding Standards: 5346c609719bSwdenk----------------- 5347c609719bSwdenk 5348c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 53492c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 53507ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5351c609719bSwdenk 53522c051651SDetlev ZundelSource files originating from a different project (for example the 53532c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 53542c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 53552c051651SDetlev Zundelsources. 53562c051651SDetlev Zundel 53572c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 53582c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 53592c051651SDetlev Zundelin your code. 5360c609719bSwdenk 5361c178d3daSwdenkPlease also stick to the following formatting rules: 5362180d3f74Swdenk- remove any trailing white space 53637ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5364180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 53657ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5366180d3f74Swdenk- do not add trailing empty lines to source files 5367180d3f74Swdenk 5368c609719bSwdenkSubmissions which do not conform to the standards may be returned 5369c609719bSwdenkwith a request to reformat the changes. 5370c609719bSwdenk 5371c609719bSwdenk 5372c609719bSwdenkSubmitting Patches: 5373c609719bSwdenk------------------- 5374c609719bSwdenk 5375c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5376c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5377c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5378c609719bSwdenk 53790d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5380218ca724SWolfgang Denk 53810668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 53820668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 53830668236bSWolfgang Denk 5384c609719bSwdenkWhen you send a patch, please include the following information with 5385c609719bSwdenkit: 5386c609719bSwdenk 5387c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5388c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5389c609719bSwdenk patch actually fixes something. 5390c609719bSwdenk 5391c609719bSwdenk* For new features: a description of the feature and your 5392c609719bSwdenk implementation. 5393c609719bSwdenk 5394c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5395c609719bSwdenk 5396c609719bSwdenk* For major contributions, your entry to the CREDITS file 5397c609719bSwdenk 5398c609719bSwdenk* When you add support for a new board, don't forget to add this 53997ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5400c609719bSwdenk 5401c609719bSwdenk* If your patch adds new configuration options, don't forget to 5402c609719bSwdenk document these in the README file. 5403c609719bSwdenk 5404218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5405218ca724SWolfgang Denk recommended) you can easily generate the patch using the 54067ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5407218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5408218ca724SWolfgang Denk with some other mail clients. 5409c609719bSwdenk 5410218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5411218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5412218ca724SWolfgang Denk GNU diff. 54136dff5529Swdenk 5414218ca724SWolfgang Denk The current directory when running this command shall be the parent 5415218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5416218ca724SWolfgang Denk your patch includes sufficient directory information for the 5417218ca724SWolfgang Denk affected files). 5418218ca724SWolfgang Denk 5419218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5420218ca724SWolfgang Denk and compressed attachments must not be used. 5421c609719bSwdenk 542252f52c14Swdenk* If one logical set of modifications affects or creates several 542352f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 542452f52c14Swdenk 542552f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 542652f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 542752f52c14Swdenk 542852f52c14Swdenk 5429c609719bSwdenkNotes: 5430c609719bSwdenk 5431c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5432c609719bSwdenk source tree and make sure that no errors or warnings are reported 5433c609719bSwdenk for any of the boards. 5434c609719bSwdenk 5435c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5436c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5437c609719bSwdenk returned with a request to re-formatting / split it. 5438c609719bSwdenk 5439c609719bSwdenk* If you modify existing code, make sure that your new code does not 5440c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5441c609719bSwdenk When adding new features, these should compile conditionally only 5442c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5443c609719bSwdenk disabled must not need more memory than the old code without your 5444c609719bSwdenk modification. 544590dc6704Swdenk 54460668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 54470668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 54480668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 54490668236bSWolfgang Denk bigger than the size limit should be avoided. 5450