1 c609719bSwdenk# 2 b75190deSWolfgang Denk# (C) Copyright 2000 - 2012 3 c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 c609719bSwdenk# 5 c609719bSwdenk# See file CREDITS for list of people who contributed to this 6 c609719bSwdenk# project. 7 c609719bSwdenk# 8 c609719bSwdenk# This program is free software; you can redistribute it and/or 9 c609719bSwdenk# modify it under the terms of the GNU General Public License as 10 c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11 c609719bSwdenk# the License, or (at your option) any later version. 12 c609719bSwdenk# 13 c609719bSwdenk# This program is distributed in the hope that it will be useful, 14 c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15 c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 c609719bSwdenk# GNU General Public License for more details. 17 c609719bSwdenk# 18 c609719bSwdenk# You should have received a copy of the GNU General Public License 19 c609719bSwdenk# along with this program; if not, write to the Free Software 20 c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 c609719bSwdenk# MA 02111-1307 USA 22 c609719bSwdenk# 23 c609719bSwdenk 24 c609719bSwdenkSummary: 25 c609719bSwdenk======== 26 c609719bSwdenk 27 24ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28 e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29 e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30 e86e5a07Swdenkinitialize and test the hardware or to download and run application 31 e86e5a07Swdenkcode. 32 c609719bSwdenk 33 c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 34 24ee89b9Swdenkthe source code originate in the Linux source tree, we have some 35 24ee89b9Swdenkheader files in common, and special provision has been made to 36 c609719bSwdenksupport booting of Linux images. 37 c609719bSwdenk 38 c609719bSwdenkSome attention has been paid to make this software easily 39 c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40 c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41 c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42 c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43 c609719bSwdenkload and run it dynamically. 44 c609719bSwdenk 45 c609719bSwdenk 46 c609719bSwdenkStatus: 47 c609719bSwdenk======= 48 c609719bSwdenk 49 c609719bSwdenkIn general, all boards for which a configuration option exists in the 50 c609719bSwdenkMakefile have been tested to some extent and can be considered 51 c609719bSwdenk"working". In fact, many of them are used in production systems. 52 c609719bSwdenk 53 c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54 218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55 218ca724SWolfgang Denkmaintainers. 56 c609719bSwdenk 57 c609719bSwdenk 58 c609719bSwdenkWhere to get help: 59 c609719bSwdenk================== 60 c609719bSwdenk 61 c609719bSwdenkIn case you have questions about, problems with or contributions for 62 c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 63 0c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 64 0c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 65 0c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 66 0c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 67 c609719bSwdenk 68 c609719bSwdenk 69 218ca724SWolfgang DenkWhere to get source code: 70 218ca724SWolfgang Denk========================= 71 218ca724SWolfgang Denk 72 218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73 218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74 218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75 218ca724SWolfgang Denk 76 218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 77 11ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 78 218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79 218ca724SWolfgang Denkdirectory. 80 218ca724SWolfgang Denk 81 d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82 218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83 218ca724SWolfgang Denk 84 218ca724SWolfgang Denk 85 c609719bSwdenkWhere we come from: 86 c609719bSwdenk=================== 87 c609719bSwdenk 88 c609719bSwdenk- start from 8xxrom sources 89 24ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90 c609719bSwdenk- clean up code 91 c609719bSwdenk- make it easier to add custom boards 92 c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93 c609719bSwdenk- extend functions, especially: 94 c609719bSwdenk * Provide extended interface to Linux boot loader 95 c609719bSwdenk * S-Record download 96 c609719bSwdenk * network boot 97 11ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 98 24ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99 c609719bSwdenk- add other CPU families (starting with ARM) 100 24ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 101 0d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 102 24ee89b9Swdenk 103 24ee89b9Swdenk 104 24ee89b9SwdenkNames and Spelling: 105 24ee89b9Swdenk=================== 106 24ee89b9Swdenk 107 24ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 108 24ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 109 24ee89b9Swdenkin source files etc.). Example: 110 24ee89b9Swdenk 111 24ee89b9Swdenk This is the README file for the U-Boot project. 112 24ee89b9Swdenk 113 24ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 114 24ee89b9Swdenk 115 24ee89b9Swdenk include/asm-ppc/u-boot.h 116 24ee89b9Swdenk 117 24ee89b9Swdenk #include <asm/u-boot.h> 118 24ee89b9Swdenk 119 24ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 120 24ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 121 24ee89b9Swdenk 122 24ee89b9Swdenk U_BOOT_VERSION u_boot_logo 123 24ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124 c609719bSwdenk 125 c609719bSwdenk 126 93f19cc0SwdenkVersioning: 127 93f19cc0Swdenk=========== 128 93f19cc0Swdenk 129 360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 130 360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 131 360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 132 360d883aSThomas Webernames consisting of the calendar year and month of the release date. 133 360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 134 360d883aSThomas Weberreleases in "stable" maintenance trees. 135 93f19cc0Swdenk 136 360d883aSThomas WeberExamples: 137 360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 138 360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 139 360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 140 93f19cc0Swdenk 141 93f19cc0Swdenk 142 c609719bSwdenkDirectory Hierarchy: 143 c609719bSwdenk==================== 144 c609719bSwdenk 145 8d321b81SPeter Tyser/arch Architecture specific files 146 8d321b81SPeter Tyser /arm Files generic to ARM architecture 147 8d321b81SPeter Tyser /cpu CPU specific files 148 8d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 149 8d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 150 6eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 151 8d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 152 8d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 153 8d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 154 8d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 155 8d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 156 8d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 157 8d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 158 8d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 159 8d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 160 8d321b81SPeter Tyser /lib Architecture specific library files 161 8d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 162 8d321b81SPeter Tyser /cpu CPU specific files 163 8d321b81SPeter Tyser /lib Architecture specific library files 164 8d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 165 8d321b81SPeter Tyser /cpu CPU specific files 166 8d321b81SPeter Tyser /lib Architecture specific library files 167 fea25720SGraeme Russ /x86 Files generic to x86 architecture 168 8d321b81SPeter Tyser /cpu CPU specific files 169 8d321b81SPeter Tyser /lib Architecture specific library files 170 8d321b81SPeter Tyser /m68k Files generic to m68k architecture 171 8d321b81SPeter Tyser /cpu CPU specific files 172 8d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 173 8d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 174 8d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 175 8d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 176 8d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 177 8d321b81SPeter Tyser /lib Architecture specific library files 178 8d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 179 8d321b81SPeter Tyser /cpu CPU specific files 180 8d321b81SPeter Tyser /lib Architecture specific library files 181 8d321b81SPeter Tyser /mips Files generic to MIPS architecture 182 8d321b81SPeter Tyser /cpu CPU specific files 183 92bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 184 80421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 185 8d321b81SPeter Tyser /lib Architecture specific library files 186 afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 187 afc1ce82SMacpaul Lin /cpu CPU specific files 188 afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 189 afc1ce82SMacpaul Lin /lib Architecture specific library files 190 8d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 191 8d321b81SPeter Tyser /cpu CPU specific files 192 8d321b81SPeter Tyser /lib Architecture specific library files 193 a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 194 8d321b81SPeter Tyser /cpu CPU specific files 195 8d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 196 8d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 197 8d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 198 8d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 199 8d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 200 8d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 201 8d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 202 8d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 203 8d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 204 8d321b81SPeter Tyser /lib Architecture specific library files 205 8d321b81SPeter Tyser /sh Files generic to SH architecture 206 8d321b81SPeter Tyser /cpu CPU specific files 207 8d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 208 8d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 209 8d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 210 8d321b81SPeter Tyser /lib Architecture specific library files 211 8d321b81SPeter Tyser /sparc Files generic to SPARC architecture 212 8d321b81SPeter Tyser /cpu CPU specific files 213 8d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 214 8d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 215 8d321b81SPeter Tyser /lib Architecture specific library files 216 8d321b81SPeter Tyser/api Machine/arch independent API for external apps 217 8d321b81SPeter Tyser/board Board dependent files 218 8d321b81SPeter Tyser/common Misc architecture independent functions 219 8d321b81SPeter Tyser/disk Code for disk drive partition handling 220 8d321b81SPeter Tyser/doc Documentation (don't expect too much) 221 8d321b81SPeter Tyser/drivers Commonly used device drivers 222 8d321b81SPeter Tyser/examples Example code for standalone applications, etc. 223 8d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 224 8d321b81SPeter Tyser/include Header Files 225 8d321b81SPeter Tyser/lib Files generic to all architectures 226 8d321b81SPeter Tyser /libfdt Library files to support flattened device trees 227 8d321b81SPeter Tyser /lzma Library files to support LZMA decompression 228 8d321b81SPeter Tyser /lzo Library files to support LZO decompression 229 8d321b81SPeter Tyser/net Networking code 230 8d321b81SPeter Tyser/post Power On Self Test 231 8d321b81SPeter Tyser/rtc Real Time Clock drivers 232 8d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 233 c609719bSwdenk 234 c609719bSwdenkSoftware Configuration: 235 c609719bSwdenk======================= 236 c609719bSwdenk 237 c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 238 c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 239 c609719bSwdenk 240 c609719bSwdenkThere are two classes of configuration variables: 241 c609719bSwdenk 242 c609719bSwdenk* Configuration _OPTIONS_: 243 c609719bSwdenk These are selectable by the user and have names beginning with 244 c609719bSwdenk "CONFIG_". 245 c609719bSwdenk 246 c609719bSwdenk* Configuration _SETTINGS_: 247 c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 248 c609719bSwdenk you don't know what you're doing; they have names beginning with 249 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 250 c609719bSwdenk 251 c609719bSwdenkLater we will add a configuration tool - probably similar to or even 252 c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 253 c609719bSwdenkdo the configuration by hand, which means creating some symbolic 254 c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 255 c609719bSwdenkas an example here. 256 c609719bSwdenk 257 c609719bSwdenk 258 c609719bSwdenkSelection of Processor Architecture and Board Type: 259 c609719bSwdenk--------------------------------------------------- 260 c609719bSwdenk 261 c609719bSwdenkFor all supported boards there are ready-to-use default 262 c609719bSwdenkconfigurations available; just type "make <board_name>_config". 263 c609719bSwdenk 264 c609719bSwdenkExample: For a TQM823L module type: 265 c609719bSwdenk 266 c609719bSwdenk cd u-boot 267 c609719bSwdenk make TQM823L_config 268 c609719bSwdenk 269 11ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 270 c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 271 c609719bSwdenkdirectory according to the instructions in cogent/README. 272 c609719bSwdenk 273 c609719bSwdenk 274 c609719bSwdenkConfiguration Options: 275 c609719bSwdenk---------------------- 276 c609719bSwdenk 277 c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 278 c609719bSwdenksuch information is kept in a configuration file 279 c609719bSwdenk"include/configs/<board_name>.h". 280 c609719bSwdenk 281 c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 282 c609719bSwdenk"include/configs/TQM823L.h". 283 c609719bSwdenk 284 c609719bSwdenk 285 7f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 286 7f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 287 7f6c2cbcSwdenkbuild a config tool - later. 288 7f6c2cbcSwdenk 289 7f6c2cbcSwdenk 290 c609719bSwdenkThe following options need to be configured: 291 c609719bSwdenk 292 2628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 293 c609719bSwdenk 294 2628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 295 6ccec449SWolfgang Denk 296 6ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 297 09ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 298 c609719bSwdenk 299 c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 300 c609719bSwdenk Define exactly one of 301 c609719bSwdenk CONFIG_CMA286_60_OLD 302 c609719bSwdenk--- FIXME --- not tested yet: 303 c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 304 c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 305 c609719bSwdenk 306 c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 307 c609719bSwdenk Define exactly one of 308 c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 309 c609719bSwdenk 310 c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 311 c609719bSwdenk Define one or more of 312 c609719bSwdenk CONFIG_CMA302 313 c609719bSwdenk 314 c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 315 c609719bSwdenk Define one or more of 316 c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 317 11ccc33fSMarcel Ziswiler the LCD display every second with 318 c609719bSwdenk a "rotator" |\-/|\-/ 319 c609719bSwdenk 320 2535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 321 2535d602Swdenk CONFIG_ADSTYPE 322 2535d602Swdenk Possible values are: 323 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 324 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 325 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 326 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 327 2535d602Swdenk 328 cf946c6dSLei Wen- Marvell Family Member 329 cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 330 cf946c6dSLei Wen multiple fs option at one time 331 cf946c6dSLei Wen for marvell soc family 332 cf946c6dSLei Wen 333 c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 334 c609719bSwdenk Define exactly one of 335 c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 336 c609719bSwdenk 337 11ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 338 66ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 339 66ca92a5Swdenk get_gclk_freq() cannot work 340 5da627a4Swdenk e.g. if there is no 32KHz 341 5da627a4Swdenk reference PIT/RTC clock 342 66ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 343 66ca92a5Swdenk or XTAL/EXTAL) 344 c609719bSwdenk 345 66ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 346 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 347 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 348 66ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 349 75d1ea7fSwdenk See doc/README.MPC866 350 75d1ea7fSwdenk 351 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 352 75d1ea7fSwdenk 353 75d1ea7fSwdenk Define this to measure the actual CPU clock instead 354 75d1ea7fSwdenk of relying on the correctness of the configured 355 75d1ea7fSwdenk values. Mostly useful for board bringup to make sure 356 75d1ea7fSwdenk the PLL is locked at the intended frequency. Note 357 75d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 358 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 359 75d1ea7fSwdenk 360 506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 361 506f3918SHeiko Schocher 362 506f3918SHeiko Schocher Define this option if you want to enable the 363 506f3918SHeiko Schocher ICache only when Code runs from RAM. 364 506f3918SHeiko Schocher 365 66412c63SKumar Gala- 85xx CPU Options: 366 66412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 367 66412c63SKumar Gala 368 66412c63SKumar Gala Defines the core time base clock divider ratio compared to the 369 66412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 370 66412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 371 66412c63SKumar Gala 372 8f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 373 8f29084aSKumar Gala 374 8f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 375 8f29084aSKumar Gala tree nodes for the given platform. 376 8f29084aSKumar Gala 377 afa6b551SPrabhakar Kushwaha CONFIG_SYS_PPC_E500_DEBUG_TLB 378 afa6b551SPrabhakar Kushwaha 379 afa6b551SPrabhakar Kushwaha Enables a temporary TLB entry to be used during boot to work 380 afa6b551SPrabhakar Kushwaha around limitations in e500v1 and e500v2 external debugger 381 afa6b551SPrabhakar Kushwaha support. This reduces the portions of the boot code where 382 afa6b551SPrabhakar Kushwaha breakpoints and single stepping do not work. The value of this 383 afa6b551SPrabhakar Kushwaha symbol should be set to the TLB1 entry to be used for this 384 afa6b551SPrabhakar Kushwaha purpose. 385 afa6b551SPrabhakar Kushwaha 386 6cb461b4SDaniel Schwierzeck- Generic CPU options: 387 6cb461b4SDaniel Schwierzeck CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN 388 6cb461b4SDaniel Schwierzeck 389 6cb461b4SDaniel Schwierzeck Defines the endianess of the CPU. Implementation of those 390 6cb461b4SDaniel Schwierzeck values is arch specific. 391 6cb461b4SDaniel Schwierzeck 392 0b953ffcSMarkus Klotzbuecher- Intel Monahans options: 393 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 394 0b953ffcSMarkus Klotzbuecher 395 0b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 396 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 397 0b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 398 0b953ffcSMarkus Klotzbuecher 399 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 400 0b953ffcSMarkus Klotzbuecher 401 0b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 402 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 403 0b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 404 0b953ffcSMarkus Klotzbuecher by this value. 405 0b953ffcSMarkus Klotzbuecher 406 92bbd64eSDaniel Schwierzeck- MIPS CPU options: 407 92bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 408 92bbd64eSDaniel Schwierzeck 409 92bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 410 92bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 411 92bbd64eSDaniel Schwierzeck relocation. 412 92bbd64eSDaniel Schwierzeck 413 92bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 414 92bbd64eSDaniel Schwierzeck 415 92bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 416 92bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 417 92bbd64eSDaniel Schwierzeck Possible values are: 418 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 419 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 420 92bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 421 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 422 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 423 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 424 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 425 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 426 92bbd64eSDaniel Schwierzeck 427 92bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 428 92bbd64eSDaniel Schwierzeck 429 92bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 430 92bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 431 92bbd64eSDaniel Schwierzeck 432 92bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 433 92bbd64eSDaniel Schwierzeck 434 92bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 435 92bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 436 92bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 437 92bbd64eSDaniel Schwierzeck 438 b67d8816SChristian Riesch- ARM options: 439 b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 440 b67d8816SChristian Riesch 441 b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 442 b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 443 b67d8816SChristian Riesch 444 5356f545SAneesh V CONFIG_SYS_THUMB_BUILD 445 5356f545SAneesh V 446 5356f545SAneesh V Use this flag to build U-Boot using the Thumb instruction 447 5356f545SAneesh V set for ARM architectures. Thumb instruction set provides 448 5356f545SAneesh V better code density. For ARM architectures that support 449 5356f545SAneesh V Thumb2 this flag will result in Thumb2 code generated by 450 5356f545SAneesh V GCC. 451 5356f545SAneesh V 452 5da627a4Swdenk- Linux Kernel Interface: 453 c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 454 c609719bSwdenk 455 c609719bSwdenk U-Boot stores all clock information in Hz 456 c609719bSwdenk internally. For binary compatibility with older Linux 457 c609719bSwdenk kernels (which expect the clocks passed in the 458 c609719bSwdenk bd_info data to be in MHz) the environment variable 459 c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 460 c609719bSwdenk converts clock data to MHZ before passing it to the 461 c609719bSwdenk Linux kernel. 462 c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 463 c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 464 c609719bSwdenk default environment. 465 c609719bSwdenk 466 5da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 467 5da627a4Swdenk 468 11ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 469 5da627a4Swdenk expect it to be in bytes, others in MB. 470 5da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 471 5da627a4Swdenk 472 fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 473 f57f70aaSWolfgang Denk 474 f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 475 213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 476 213bf8c8SGerald Van Baren concepts). 477 213bf8c8SGerald Van Baren 478 213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 479 213bf8c8SGerald Van Baren * New libfdt-based support 480 213bf8c8SGerald Van Baren * Adds the "fdt" command 481 3bb342fcSKim Phillips * The bootm command automatically updates the fdt 482 213bf8c8SGerald Van Baren 483 b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 484 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 485 b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 486 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 487 f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 488 c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 489 f57f70aaSWolfgang Denk 490 11ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 491 11ccc33fSMarcel Ziswiler addresses 492 3bb342fcSKim Phillips 493 4e253137SKumar Gala CONFIG_OF_BOARD_SETUP 494 4e253137SKumar Gala 495 4e253137SKumar Gala Board code has addition modification that it wants to make 496 4e253137SKumar Gala to the flat device tree before handing it off to the kernel 497 6705d81eSwdenk 498 0267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 499 0267768eSMatthew McClintock 500 11ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 501 0267768eSMatthew McClintock param header, the default value is zero if undefined. 502 0267768eSMatthew McClintock 503 3887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 504 3887c3fbSHeiko Schocher 505 3887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 506 3887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 507 3887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 508 3887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 509 3887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 510 3887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 511 3887c3fbSHeiko Schocher 512 7eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 513 7eb29398SIgor Grinberg 514 7eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 515 7eb29398SIgor Grinberg machine type and must be used to specify the machine type 516 7eb29398SIgor Grinberg number as it appears in the ARM machine registry 517 7eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 518 7eb29398SIgor Grinberg Only boards that have multiple machine types supported 519 7eb29398SIgor Grinberg in a single configuration file and the machine type is 520 7eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 521 7eb29398SIgor Grinberg 522 0b2f4ecaSNiklaus Giger- vxWorks boot parameters: 523 0b2f4ecaSNiklaus Giger 524 0b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 525 0b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 526 0b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 527 0b2f4ecaSNiklaus Giger 528 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 529 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 530 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 531 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 532 0b2f4ecaSNiklaus Giger 533 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 534 0b2f4ecaSNiklaus Giger 535 0b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 536 0b2f4ecaSNiklaus Giger 537 0b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 538 0b2f4ecaSNiklaus Giger the defaults discussed just above. 539 0b2f4ecaSNiklaus Giger 540 2c451f78SAneesh V- Cache Configuration: 541 2c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 542 2c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 543 2c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 544 2c451f78SAneesh V 545 93bc2193SAneesh V- Cache Configuration for ARM: 546 93bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 547 93bc2193SAneesh V controller 548 93bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 549 93bc2193SAneesh V controller register space 550 93bc2193SAneesh V 551 6705d81eSwdenk- Serial Ports: 552 48d0192fSAndreas Engel CONFIG_PL010_SERIAL 553 6705d81eSwdenk 554 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 555 6705d81eSwdenk 556 48d0192fSAndreas Engel CONFIG_PL011_SERIAL 557 6705d81eSwdenk 558 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 559 6705d81eSwdenk 560 6705d81eSwdenk CONFIG_PL011_CLOCK 561 6705d81eSwdenk 562 6705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 563 6705d81eSwdenk the clock speed of the UARTs. 564 6705d81eSwdenk 565 6705d81eSwdenk CONFIG_PL01x_PORTS 566 6705d81eSwdenk 567 6705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 568 6705d81eSwdenk define this to a list of base addresses for each (supported) 569 6705d81eSwdenk port. See e.g. include/configs/versatile.h 570 6705d81eSwdenk 571 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 572 910f1ae3SJohn Rigby 573 910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 574 910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 575 910f1ae3SJohn Rigby this variable to initialize the extra register. 576 910f1ae3SJohn Rigby 577 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 578 910f1ae3SJohn Rigby 579 910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 580 910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 581 910f1ae3SJohn Rigby variable to flush the UART at init time. 582 910f1ae3SJohn Rigby 583 6705d81eSwdenk 584 c609719bSwdenk- Console Interface: 585 c609719bSwdenk Depending on board, define exactly one serial port 586 c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 587 c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 588 c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 589 c609719bSwdenk 590 c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 591 c609719bSwdenk port routines must be defined elsewhere 592 c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 593 c609719bSwdenk 594 c609719bSwdenk CONFIG_CFB_CONSOLE 595 c609719bSwdenk Enables console device for a color framebuffer. Needs following 596 c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 597 c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 598 c609719bSwdenk (default big endian) 599 c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 600 c609719bSwdenk rectangle fill 601 c609719bSwdenk (cf. smiLynxEM) 602 c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 603 c609719bSwdenk bit-blit (cf. smiLynxEM) 604 c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 605 c609719bSwdenk (cols=pitch) 606 c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 607 c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 608 c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 609 c609719bSwdenk (0-5, cf. cfb_console.c) 610 c609719bSwdenk VIDEO_FB_ADRS framebuffer address 611 c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 612 c609719bSwdenk (i.e. i8042_kbd_init()) 613 c609719bSwdenk VIDEO_TSTC_FCT test char fct 614 c609719bSwdenk (i.e. i8042_tstc) 615 c609719bSwdenk VIDEO_GETC_FCT get char fct 616 c609719bSwdenk (i.e. i8042_getc) 617 c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 618 c609719bSwdenk (requires blink timer 619 c609719bSwdenk cf. i8042.c) 620 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 621 c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 622 c609719bSwdenk upper right corner 623 602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 624 c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 625 c609719bSwdenk upper left corner 626 a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 627 a6c7ad2fSwdenk linux_logo.h for logo. 628 a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 629 c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 630 11ccc33fSMarcel Ziswiler additional board info beside 631 c609719bSwdenk the logo 632 c609719bSwdenk 633 c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 634 c609719bSwdenk default i/o. Serial console can be forced with 635 c609719bSwdenk environment 'console=serial'. 636 c609719bSwdenk 637 a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 638 a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 639 a3ad8e26Swdenk the "silent" environment variable. See 640 a3ad8e26Swdenk doc/README.silent for more information. 641 a3ad8e26Swdenk 642 c609719bSwdenk- Console Baudrate: 643 c609719bSwdenk CONFIG_BAUDRATE - in bps 644 c609719bSwdenk Select one of the baudrates listed in 645 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 646 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 647 c609719bSwdenk 648 c92fac91SHeiko Schocher- Console Rx buffer length 649 c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 650 c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 651 2b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 652 c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 653 c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 654 c92fac91SHeiko Schocher the SMC. 655 c92fac91SHeiko Schocher 656 9558b48aSGraeme Russ- Pre-Console Buffer: 657 9558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 658 9558b48aSGraeme Russ initialised etc) all console output is silently discarded. 659 9558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 660 9558b48aSGraeme Russ buffer any console messages prior to the console being 661 9558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 662 9558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 663 9558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 664 9558b48aSGraeme Russ bytes are output before the console is initialised, the 665 9558b48aSGraeme Russ earlier bytes are discarded. 666 9558b48aSGraeme Russ 667 9558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 668 9558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 669 9558b48aSGraeme Russ 670 046a37bdSSonny Rao- Safe printf() functions 671 046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 672 046a37bdSSonny Rao the printf() functions. These are defined in 673 046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 674 046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 675 046a37bdSSonny Rao If this option is not given then these functions will 676 046a37bdSSonny Rao silently discard their buffer size argument - this means 677 046a37bdSSonny Rao you are not getting any overflow checking in this case. 678 046a37bdSSonny Rao 679 c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 680 c609719bSwdenk Delay before automatically booting the default image; 681 c609719bSwdenk set to -1 to disable autoboot. 682 c609719bSwdenk 683 c609719bSwdenk See doc/README.autoboot for these options that 684 c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 685 c609719bSwdenk CONFIG_BOOT_RETRY_TIME 686 c609719bSwdenk CONFIG_BOOT_RETRY_MIN 687 c609719bSwdenk CONFIG_AUTOBOOT_KEYED 688 c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 689 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 690 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 691 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 692 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 693 c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 694 c609719bSwdenk CONFIG_RESET_TO_RETRY 695 c609719bSwdenk 696 c609719bSwdenk- Autoboot Command: 697 c609719bSwdenk CONFIG_BOOTCOMMAND 698 c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 699 c609719bSwdenk define a command string that is automatically executed 700 c609719bSwdenk when no character is read on the console interface 701 c609719bSwdenk within "Boot Delay" after reset. 702 c609719bSwdenk 703 c609719bSwdenk CONFIG_BOOTARGS 704 c609719bSwdenk This can be used to pass arguments to the bootm 705 c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 706 c609719bSwdenk environment value "bootargs". 707 c609719bSwdenk 708 c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 709 c609719bSwdenk The value of these goes into the environment as 710 c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 711 c609719bSwdenk as a convenience, when switching between booting from 712 11ccc33fSMarcel Ziswiler RAM and NFS. 713 c609719bSwdenk 714 c609719bSwdenk- Pre-Boot Commands: 715 c609719bSwdenk CONFIG_PREBOOT 716 c609719bSwdenk 717 c609719bSwdenk When this option is #defined, the existence of the 718 c609719bSwdenk environment variable "preboot" will be checked 719 c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 720 c609719bSwdenk countdown and/or running the auto-boot command resp. 721 c609719bSwdenk entering interactive mode. 722 c609719bSwdenk 723 c609719bSwdenk This feature is especially useful when "preboot" is 724 c609719bSwdenk automatically generated or modified. For an example 725 c609719bSwdenk see the LWMON board specific code: here "preboot" is 726 c609719bSwdenk modified when the user holds down a certain 727 c609719bSwdenk combination of keys on the (special) keyboard when 728 c609719bSwdenk booting the systems 729 c609719bSwdenk 730 c609719bSwdenk- Serial Download Echo Mode: 731 c609719bSwdenk CONFIG_LOADS_ECHO 732 c609719bSwdenk If defined to 1, all characters received during a 733 c609719bSwdenk serial download (using the "loads" command) are 734 c609719bSwdenk echoed back. This might be needed by some terminal 735 c609719bSwdenk emulations (like "cu"), but may as well just take 736 c609719bSwdenk time on others. This setting #define's the initial 737 c609719bSwdenk value of the "loads_echo" environment variable. 738 c609719bSwdenk 739 602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 740 c609719bSwdenk CONFIG_KGDB_BAUDRATE 741 c609719bSwdenk Select one of the baudrates listed in 742 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 743 c609719bSwdenk 744 c609719bSwdenk- Monitor Functions: 745 602ad3b3SJon Loeliger Monitor commands can be included or excluded 746 602ad3b3SJon Loeliger from the build by using the #include files 747 c6c621bdSStephen Warren <config_cmd_all.h> and #undef'ing unwanted 748 c6c621bdSStephen Warren commands, or using <config_cmd_default.h> 749 602ad3b3SJon Loeliger and augmenting with additional #define's 750 602ad3b3SJon Loeliger for wanted commands. 751 c609719bSwdenk 752 602ad3b3SJon Loeliger The default command configuration includes all commands 753 602ad3b3SJon Loeliger except those marked below with a "*". 754 602ad3b3SJon Loeliger 755 602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 756 602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 757 602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 758 602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 759 602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 760 602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 761 602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 762 602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 763 710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 764 602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 765 602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 766 602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 767 a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 768 a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 769 a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 770 a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 771 602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 772 602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 773 246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 774 602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 775 602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 776 0c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 777 bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 778 602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 779 602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 780 602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 781 602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 782 602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 783 a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 784 a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 785 602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 786 602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 787 602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 788 602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 789 602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 790 602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 791 0c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 792 602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 793 602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 794 602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 795 602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 796 1ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 797 d22c338eSJoe Hershberger CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration 798 d22c338eSJoe Hershberger (169.254.*.*) 799 602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 800 602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 801 02c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 802 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 803 602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 804 56523f12Swdenk loop, loopw, mtest 805 602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 806 602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 807 602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 808 68d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 809 602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 810 602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 811 e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 812 e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 813 602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 814 602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 815 602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 816 602ad3b3SJon Loeliger host 817 602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 818 602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 819 602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 820 602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 821 602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 822 602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 823 602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 824 602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 825 602ad3b3SJon Loeliger (4xx only) 826 f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 827 c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 828 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 829 74de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 830 602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 831 7a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 832 1fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 833 ca366d0eSChe-liang Chiou CONFIG_CMD_TIME * run command and report execution time 834 602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 835 602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 836 c8339f51SMarek Vasut CONFIG_CMD_MFSL * Microblaze FSL support 837 c609719bSwdenk 838 c609719bSwdenk 839 c609719bSwdenk EXAMPLE: If you want all functions except of network 840 c609719bSwdenk support you can write: 841 c609719bSwdenk 842 602ad3b3SJon Loeliger #include "config_cmd_all.h" 843 602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 844 c609719bSwdenk 845 213bf8c8SGerald Van Baren Other Commands: 846 213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 847 c609719bSwdenk 848 c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 849 602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 850 c609719bSwdenk what you (and your U-Boot users) are doing. Data 851 c609719bSwdenk cache cannot be enabled on systems like the 8xx or 852 c609719bSwdenk 8260 (where accesses to the IMMR region must be 853 c609719bSwdenk uncached), and it cannot be disabled on all other 854 c609719bSwdenk systems where we (mis-) use the data cache to hold an 855 c609719bSwdenk initial stack and some data. 856 c609719bSwdenk 857 c609719bSwdenk 858 c609719bSwdenk XXX - this list needs to get updated! 859 c609719bSwdenk 860 45ba8077SSimon Glass- Device tree: 861 45ba8077SSimon Glass CONFIG_OF_CONTROL 862 45ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 863 45ba8077SSimon Glass to configure its devices, instead of relying on statically 864 45ba8077SSimon Glass compiled #defines in the board file. This option is 865 45ba8077SSimon Glass experimental and only available on a few boards. The device 866 45ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 867 45ba8077SSimon Glass 868 2c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 869 2c0f79e4SSimon Glass be done using one of the two options below: 870 bbb0b128SSimon Glass 871 bbb0b128SSimon Glass CONFIG_OF_EMBED 872 bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 873 bbb0b128SSimon Glass binary in its image. This device tree file should be in the 874 bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 875 bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 876 bbb0b128SSimon Glass the global data structure as gd->blob. 877 45ba8077SSimon Glass 878 2c0f79e4SSimon Glass CONFIG_OF_SEPARATE 879 2c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 880 2c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 881 2c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 882 2c0f79e4SSimon Glass 883 2c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 884 2c0f79e4SSimon Glass 885 2c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 886 2c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 887 2c0f79e4SSimon Glass still use the individual files if you need something more 888 2c0f79e4SSimon Glass exotic. 889 2c0f79e4SSimon Glass 890 c609719bSwdenk- Watchdog: 891 c609719bSwdenk CONFIG_WATCHDOG 892 c609719bSwdenk If this variable is defined, it enables watchdog 893 6abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 894 6abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 895 6abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 896 6abe6fb6SDetlev Zundel register. When supported for a specific SoC is 897 6abe6fb6SDetlev Zundel available, then no further board specific code should 898 6abe6fb6SDetlev Zundel be needed to use it. 899 6abe6fb6SDetlev Zundel 900 6abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 901 6abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 902 6abe6fb6SDetlev Zundel SoC, then define this variable and provide board 903 6abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 904 c609719bSwdenk 905 c1551ea8Sstroese- U-Boot Version: 906 c1551ea8Sstroese CONFIG_VERSION_VARIABLE 907 c1551ea8Sstroese If this variable is defined, an environment variable 908 c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 909 c1551ea8Sstroese version as printed by the "version" command. 910 a1ea8e51SBenoît Thébaudeau Any change to this variable will be reverted at the 911 a1ea8e51SBenoît Thébaudeau next reset. 912 c1551ea8Sstroese 913 c609719bSwdenk- Real-Time Clock: 914 c609719bSwdenk 915 602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 916 c609719bSwdenk has to be selected, too. Define exactly one of the 917 c609719bSwdenk following options: 918 c609719bSwdenk 919 c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 920 c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 921 4e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 922 c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 923 1cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 924 c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 925 7f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 926 3bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 927 9536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 928 4c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 929 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 930 71d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 931 71d19f30SHeiko Schocher RV3029 RTC. 932 c609719bSwdenk 933 b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 934 b37c7e5eSwdenk must also be configured. See I2C Support, below. 935 b37c7e5eSwdenk 936 e92739d3SPeter Tyser- GPIO Support: 937 e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 938 e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 939 e92739d3SPeter Tyser 940 5dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 941 5dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 942 5dec49caSChris Packham pins supported by a particular chip. 943 5dec49caSChris Packham 944 e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 945 e92739d3SPeter Tyser must also be configured. See I2C Support, below. 946 e92739d3SPeter Tyser 947 c609719bSwdenk- Timestamp Support: 948 c609719bSwdenk 949 c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 950 c609719bSwdenk (date and time) of an image is printed by image 951 c609719bSwdenk commands like bootm or iminfo. This option is 952 602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 953 c609719bSwdenk 954 *923c46f9SKarl O. Pinc- Partition Labels (disklabels) Supported: 955 *923c46f9SKarl O. Pinc Zero or more of the following: 956 *923c46f9SKarl O. Pinc CONFIG_MAC_PARTITION Apple's MacOS partition table. 957 *923c46f9SKarl O. Pinc CONFIG_DOS_PARTITION MS Dos partition table, traditional on the 958 *923c46f9SKarl O. Pinc Intel architecture, USB sticks, etc. 959 *923c46f9SKarl O. Pinc CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. 960 *923c46f9SKarl O. Pinc CONFIG_EFI_PARTITION GPT partition table, common when EFI is the 961 *923c46f9SKarl O. Pinc bootloader. Note 2TB partition limit; see 962 *923c46f9SKarl O. Pinc disk/part_efi.c 963 *923c46f9SKarl O. Pinc CONFIG_MTD_PARTITIONS Memory Technology Device partition table. 964 c609719bSwdenk 965 602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 966 218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 967 *923c46f9SKarl O. Pinc least one non-MTD partition type as well. 968 c609719bSwdenk 969 c609719bSwdenk- IDE Reset method: 970 4d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 971 4d13cbadSwdenk board configurations files but used nowhere! 972 c609719bSwdenk 973 4d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 974 4d13cbadSwdenk be performed by calling the function 975 4d13cbadSwdenk ide_set_reset(int reset) 976 4d13cbadSwdenk which has to be defined in a board specific file 977 c609719bSwdenk 978 c609719bSwdenk- ATAPI Support: 979 c609719bSwdenk CONFIG_ATAPI 980 c609719bSwdenk 981 c609719bSwdenk Set this to enable ATAPI support. 982 c609719bSwdenk 983 c40b2956Swdenk- LBA48 Support 984 c40b2956Swdenk CONFIG_LBA48 985 c40b2956Swdenk 986 c40b2956Swdenk Set this to enable support for disks larger than 137GB 987 4b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 988 c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 989 c40b2956Swdenk support disks up to 2.1TB. 990 c40b2956Swdenk 991 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 992 c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 993 c40b2956Swdenk Default is 32bit. 994 c40b2956Swdenk 995 c609719bSwdenk- SCSI Support: 996 c609719bSwdenk At the moment only there is only support for the 997 c609719bSwdenk SYM53C8XX SCSI controller; define 998 c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 999 c609719bSwdenk 1000 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 1001 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 1002 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 1003 c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 1004 c609719bSwdenk devices. 1005 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 1006 c609719bSwdenk 1007 c609719bSwdenk- NETWORK Support (PCI): 1008 682011ffSwdenk CONFIG_E1000 1009 ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 1010 ce5207e1SKyle Moffett 1011 ce5207e1SKyle Moffett CONFIG_E1000_SPI 1012 ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 1013 ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 1014 ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 1015 ce5207e1SKyle Moffett 1016 ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1017 ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1018 ce5207e1SKyle Moffett example with the "sspi" command. 1019 ce5207e1SKyle Moffett 1020 ce5207e1SKyle Moffett CONFIG_CMD_E1000 1021 ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1022 ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1023 682011ffSwdenk 1024 ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 1025 11ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1026 ac3315c2SAndre Schwarz 1027 c609719bSwdenk CONFIG_EEPRO100 1028 c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 1029 11ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1030 c609719bSwdenk write routine for first time initialisation. 1031 c609719bSwdenk 1032 c609719bSwdenk CONFIG_TULIP 1033 c609719bSwdenk Support for Digital 2114x chips. 1034 c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1035 c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1036 c609719bSwdenk 1037 c609719bSwdenk CONFIG_NATSEMI 1038 c609719bSwdenk Support for National dp83815 chips. 1039 c609719bSwdenk 1040 c609719bSwdenk CONFIG_NS8382X 1041 c609719bSwdenk Support for National dp8382[01] gigabit chips. 1042 c609719bSwdenk 1043 45219c46Swdenk- NETWORK Support (other): 1044 45219c46Swdenk 1045 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1046 c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1047 c041e9d2SJens Scharsig 1048 c041e9d2SJens Scharsig CONFIG_RMII 1049 c041e9d2SJens Scharsig Define this to use reduced MII inteface 1050 c041e9d2SJens Scharsig 1051 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1052 c041e9d2SJens Scharsig If this defined, the driver is quiet. 1053 c041e9d2SJens Scharsig The driver doen't show link status messages. 1054 c041e9d2SJens Scharsig 1055 efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1056 efdd7319SRob Herring Support for the Calxeda XGMAC device 1057 efdd7319SRob Herring 1058 45219c46Swdenk CONFIG_DRIVER_LAN91C96 1059 45219c46Swdenk Support for SMSC's LAN91C96 chips. 1060 45219c46Swdenk 1061 45219c46Swdenk CONFIG_LAN91C96_BASE 1062 45219c46Swdenk Define this to hold the physical address 1063 45219c46Swdenk of the LAN91C96's I/O space 1064 45219c46Swdenk 1065 45219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 1066 45219c46Swdenk Define this to enable 32 bit addressing 1067 45219c46Swdenk 1068 f39748aeSwdenk CONFIG_DRIVER_SMC91111 1069 f39748aeSwdenk Support for SMSC's LAN91C111 chip 1070 f39748aeSwdenk 1071 f39748aeSwdenk CONFIG_SMC91111_BASE 1072 f39748aeSwdenk Define this to hold the physical address 1073 f39748aeSwdenk of the device (I/O space) 1074 f39748aeSwdenk 1075 f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1076 f39748aeSwdenk Define this if data bus is 32 bits 1077 f39748aeSwdenk 1078 f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1079 f39748aeSwdenk Define this to use i/o functions instead of macros 1080 f39748aeSwdenk (some hardware wont work with macros) 1081 f39748aeSwdenk 1082 dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1083 dc02badaSHeiko Schocher Support for davinci emac 1084 dc02badaSHeiko Schocher 1085 dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1086 dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1087 dc02badaSHeiko Schocher 1088 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1089 b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1090 b3dbf4a5SMacpaul Lin 1091 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1092 b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1093 b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1094 b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1095 b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1096 b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1097 b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1098 b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1099 b3dbf4a5SMacpaul Lin 1100 c2fff331SMike Rapoport CONFIG_SMC911X 1101 557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1102 557b377dSJens Gehrlein 1103 c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1104 557b377dSJens Gehrlein Define this to hold the physical address 1105 557b377dSJens Gehrlein of the device (I/O space) 1106 557b377dSJens Gehrlein 1107 c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1108 557b377dSJens Gehrlein Define this if data bus is 32 bits 1109 557b377dSJens Gehrlein 1110 c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1111 557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1112 557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1113 c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1114 557b377dSJens Gehrlein 1115 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 1116 3d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 1117 3d0075faSYoshihiro Shimoda 1118 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 1119 3d0075faSYoshihiro Shimoda Define the number of ports to be used 1120 3d0075faSYoshihiro Shimoda 1121 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 1122 3d0075faSYoshihiro Shimoda Define the ETH PHY's address 1123 3d0075faSYoshihiro Shimoda 1124 68260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 1125 68260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 1126 68260aabSYoshihiro Shimoda 1127 5e124724SVadim Bendebury- TPM Support: 1128 5e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 1129 5e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 1130 5e124724SVadim Bendebury per system is supported at this time. 1131 5e124724SVadim Bendebury 1132 5e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 1133 5e124724SVadim Bendebury Base address where the generic TPM device is mapped 1134 5e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 1135 5e124724SVadim Bendebury 0xfed40000. 1136 5e124724SVadim Bendebury 1137 c609719bSwdenk- USB Support: 1138 c609719bSwdenk At the moment only the UHCI host controller is 1139 4d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1140 c609719bSwdenk CONFIG_USB_UHCI to enable it. 1141 c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 1142 30d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1143 c609719bSwdenk storage devices. 1144 c609719bSwdenk Note: 1145 c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1146 c609719bSwdenk (TEAC FD-05PUB). 1147 4d13cbadSwdenk MPC5200 USB requires additional defines: 1148 4d13cbadSwdenk CONFIG_USB_CLOCK 1149 4d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1150 307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1151 307ecb6dSEric Millbrandt for USB on PSC3 1152 4d13cbadSwdenk CONFIG_USB_CONFIG 1153 4d13cbadSwdenk for differential drivers: 0x00001000 1154 4d13cbadSwdenk for single ended drivers: 0x00005000 1155 307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1156 307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 1157 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1158 fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1159 fdcfaa1bSZhang Wei instead of using asynchronous interrupts 1160 4d13cbadSwdenk 1161 9ab4ce22SSimon Glass CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the 1162 9ab4ce22SSimon Glass txfilltuning field in the EHCI controller on reset. 1163 9ab4ce22SSimon Glass 1164 16c8d5e7SWolfgang Denk- USB Device: 1165 16c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 1166 16c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 1167 16c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 1168 11ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 1169 16c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 1170 16c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 1171 16c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 1172 16c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 1173 16c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 1174 16c8d5e7SWolfgang Denk a Linux host by 1175 16c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 1176 16c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 1177 16c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 1178 16c8d5e7SWolfgang Denk might be defined in YourBoardName.h 1179 16c8d5e7SWolfgang Denk 1180 16c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 1181 16c8d5e7SWolfgang Denk Define this to build a UDC device 1182 16c8d5e7SWolfgang Denk 1183 16c8d5e7SWolfgang Denk CONFIG_USB_TTY 1184 16c8d5e7SWolfgang Denk Define this to have a tty type of device available to 1185 16c8d5e7SWolfgang Denk talk to the UDC device 1186 16c8d5e7SWolfgang Denk 1187 f9da0f89SVipin KUMAR CONFIG_USBD_HS 1188 f9da0f89SVipin KUMAR Define this to enable the high speed support for usb 1189 f9da0f89SVipin KUMAR device and usbtty. If this feature is enabled, a routine 1190 f9da0f89SVipin KUMAR int is_usbd_high_speed(void) 1191 f9da0f89SVipin KUMAR also needs to be defined by the driver to dynamically poll 1192 f9da0f89SVipin KUMAR whether the enumeration has succeded at high speed or full 1193 f9da0f89SVipin KUMAR speed. 1194 f9da0f89SVipin KUMAR 1195 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 1196 16c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 1197 16c8d5e7SWolfgang Denk be set to usbtty. 1198 16c8d5e7SWolfgang Denk 1199 16c8d5e7SWolfgang Denk mpc8xx: 1200 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 1201 16c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 1202 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 1203 16c8d5e7SWolfgang Denk 1204 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 1205 16c8d5e7SWolfgang Denk Derive USB clock from brgclk 1206 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 1207 16c8d5e7SWolfgang Denk 1208 16c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 1209 16c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 1210 16c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 1211 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 1212 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 1213 16c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 1214 16c8d5e7SWolfgang Denk 1215 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 1216 16c8d5e7SWolfgang Denk Define this string as the name of your company for 1217 16c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 1218 16c8d5e7SWolfgang Denk 1219 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 1220 16c8d5e7SWolfgang Denk Define this string as the name of your product 1221 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 1222 16c8d5e7SWolfgang Denk 1223 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 1224 16c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 1225 16c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 1226 16c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 1227 16c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 1228 16c8d5e7SWolfgang Denk 1229 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 1230 16c8d5e7SWolfgang Denk Define this as the unique Product ID 1231 16c8d5e7SWolfgang Denk for your device 1232 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1233 c609719bSwdenk 1234 d70a560fSIgor Grinberg- ULPI Layer Support: 1235 d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1236 d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1237 d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1238 d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1239 d70a560fSIgor Grinberg viewport is supported. 1240 d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1241 d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 1242 c609719bSwdenk 1243 c609719bSwdenk- MMC Support: 1244 c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1245 c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1246 c609719bSwdenk accessed from the boot prompt by mapping the device 1247 c609719bSwdenk to physical memory similar to flash. Command line is 1248 602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1249 602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1250 c609719bSwdenk 1251 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1252 afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1253 afb35666SYoshihiro Shimoda 1254 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1255 afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1256 afb35666SYoshihiro Shimoda 1257 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1258 afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1259 afb35666SYoshihiro Shimoda 1260 6705d81eSwdenk- Journaling Flash filesystem support: 1261 6705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 1262 6705d81eSwdenk CONFIG_JFFS2_NAND_DEV 1263 6705d81eSwdenk Define these for a default partition on a NAND device 1264 6705d81eSwdenk 1265 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 1266 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 1267 6705d81eSwdenk Define these for a default partition on a NOR device 1268 6705d81eSwdenk 1269 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 1270 6705d81eSwdenk Define this to create an own partition. You have to provide a 1271 6705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 1272 6705d81eSwdenk 1273 6705d81eSwdenk If you define only one JFFS2 partition you may also want to 1274 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 1275 6705d81eSwdenk to disable the command chpart. This is the default when you 1276 6705d81eSwdenk have not defined a custom partition 1277 6705d81eSwdenk 1278 c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1279 c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1280 656f4c65SDonggeun Kim 1281 656f4c65SDonggeun Kim Define this to enable support for saving memory data as a 1282 656f4c65SDonggeun Kim file in FAT formatted partition. 1283 656f4c65SDonggeun Kim 1284 656f4c65SDonggeun Kim This will also enable the command "fatwrite" enabling the 1285 656f4c65SDonggeun Kim user to write files to FAT. 1286 c30a15e5SDonggeun Kim 1287 c609719bSwdenk- Keyboard Support: 1288 c609719bSwdenk CONFIG_ISA_KEYBOARD 1289 c609719bSwdenk 1290 c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1291 c609719bSwdenk support 1292 c609719bSwdenk 1293 c609719bSwdenk CONFIG_I8042_KBD 1294 c609719bSwdenk Standard PC keyboard driver with US (is default) and 1295 c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1296 c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1297 c609719bSwdenk for cfb_console. Supports cursor blinking. 1298 c609719bSwdenk 1299 c609719bSwdenk- Video support: 1300 c609719bSwdenk CONFIG_VIDEO 1301 c609719bSwdenk 1302 c609719bSwdenk Define this to enable video support (for output to 1303 c609719bSwdenk video). 1304 c609719bSwdenk 1305 c609719bSwdenk CONFIG_VIDEO_CT69000 1306 c609719bSwdenk 1307 c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1308 c609719bSwdenk 1309 c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1310 eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1311 eeb1b77bSwdenk video output is selected via environment 'videoout' 1312 eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1313 eeb1b77bSwdenk assumed. 1314 c609719bSwdenk 1315 eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 1316 11ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1317 eeb1b77bSwdenk are possible: 1318 eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1319 eeb1b77bSwdenk Following standard modes are supported (* is default): 1320 eeb1b77bSwdenk 1321 eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1322 eeb1b77bSwdenk -------------+--------------------------------------------- 1323 eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1324 eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1325 eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1326 eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1327 eeb1b77bSwdenk -------------+--------------------------------------------- 1328 c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1329 c609719bSwdenk 1330 eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 1331 7817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1332 eeb1b77bSwdenk 1333 eeb1b77bSwdenk 1334 a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1335 a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1336 a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1337 a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1338 a6c7ad2fSwdenk 1339 7d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 1340 7d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 1341 7d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 1342 7d3053fbSTimur Tabi support, and should also define these other macros: 1343 7d3053fbSTimur Tabi 1344 7d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 1345 7d3053fbSTimur Tabi CONFIG_VIDEO 1346 7d3053fbSTimur Tabi CONFIG_CMD_BMP 1347 7d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 1348 7d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 1349 7d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 1350 7d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 1351 7d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 1352 7d3053fbSTimur Tabi 1353 ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1354 ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1355 ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1356 ba8e76bdSTimur Tabi description of this variable. 1357 7d3053fbSTimur Tabi 1358 682011ffSwdenk- Keyboard Support: 1359 682011ffSwdenk CONFIG_KEYBOARD 1360 682011ffSwdenk 1361 682011ffSwdenk Define this to enable a custom keyboard support. 1362 682011ffSwdenk This simply calls drv_keyboard_init() which must be 1363 682011ffSwdenk defined in your board-specific files. 1364 682011ffSwdenk The only board using this so far is RBC823. 1365 a6c7ad2fSwdenk 1366 c609719bSwdenk- LCD Support: CONFIG_LCD 1367 c609719bSwdenk 1368 c609719bSwdenk Define this to enable LCD support (for output to LCD 1369 c609719bSwdenk display); also select one of the supported displays 1370 c609719bSwdenk by defining one of these: 1371 c609719bSwdenk 1372 39cf4804SStelian Pop CONFIG_ATMEL_LCD: 1373 39cf4804SStelian Pop 1374 39cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 1375 39cf4804SStelian Pop 1376 fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1377 c609719bSwdenk 1378 fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1379 c609719bSwdenk 1380 fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1381 c609719bSwdenk 1382 fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1383 fd3103bbSwdenk Active, color, single scan. 1384 fd3103bbSwdenk 1385 fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1386 fd3103bbSwdenk 1387 fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1388 c609719bSwdenk Active, color, single scan. 1389 c609719bSwdenk 1390 c609719bSwdenk CONFIG_SHARP_16x9 1391 c609719bSwdenk 1392 c609719bSwdenk Sharp 320x240. Active, color, single scan. 1393 c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1394 c609719bSwdenk 1395 c609719bSwdenk CONFIG_SHARP_LQ64D341 1396 c609719bSwdenk 1397 c609719bSwdenk Sharp LQ64D341 display, 640x480. 1398 c609719bSwdenk Active, color, single scan. 1399 c609719bSwdenk 1400 c609719bSwdenk CONFIG_HLD1045 1401 c609719bSwdenk 1402 c609719bSwdenk HLD1045 display, 640x480. 1403 c609719bSwdenk Active, color, single scan. 1404 c609719bSwdenk 1405 c609719bSwdenk CONFIG_OPTREX_BW 1406 c609719bSwdenk 1407 c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1408 c609719bSwdenk or 1409 c609719bSwdenk Hitachi LMG6912RPFC-00T 1410 c609719bSwdenk or 1411 c609719bSwdenk Hitachi SP14Q002 1412 c609719bSwdenk 1413 c609719bSwdenk 320x240. Black & white. 1414 c609719bSwdenk 1415 c609719bSwdenk Normally display is black on white background; define 1416 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1417 c609719bSwdenk 1418 7152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1419 d791b1dcSwdenk 1420 d791b1dcSwdenk If this option is set, the environment is checked for 1421 d791b1dcSwdenk a variable "splashimage". If found, the usual display 1422 d791b1dcSwdenk of logo, copyright and system information on the LCD 1423 e94d2cd9Swdenk is suppressed and the BMP image at the address 1424 d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1425 d791b1dcSwdenk console is redirected to the "nulldev", too. This 1426 d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1427 d791b1dcSwdenk loaded very quickly after power-on. 1428 d791b1dcSwdenk 1429 1ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 1430 1ca298ceSMatthias Weisser 1431 1ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 1432 1ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 1433 1ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 1434 1ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 1435 1ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 1436 1ca298ceSMatthias Weisser specify 'm' for centering the image. 1437 1ca298ceSMatthias Weisser 1438 1ca298ceSMatthias Weisser Example: 1439 1ca298ceSMatthias Weisser setenv splashpos m,m 1440 1ca298ceSMatthias Weisser => image at center of screen 1441 1ca298ceSMatthias Weisser 1442 1ca298ceSMatthias Weisser setenv splashpos 30,20 1443 1ca298ceSMatthias Weisser => image at x = 30 and y = 20 1444 1ca298ceSMatthias Weisser 1445 1ca298ceSMatthias Weisser setenv splashpos -10,m 1446 1ca298ceSMatthias Weisser => vertically centered image 1447 1ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 1448 1ca298ceSMatthias Weisser 1449 98f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 1450 98f4a3dfSStefan Roese 1451 98f4a3dfSStefan Roese If this option is set, additionally to standard BMP 1452 98f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 1453 98f4a3dfSStefan Roese splashscreen support or the bmp command. 1454 98f4a3dfSStefan Roese 1455 d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1456 d5011762SAnatolij Gustschin 1457 d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1458 d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1459 d5011762SAnatolij Gustschin bmp command. 1460 d5011762SAnatolij Gustschin 1461 c29fdfc1Swdenk- Compression support: 1462 c29fdfc1Swdenk CONFIG_BZIP2 1463 c29fdfc1Swdenk 1464 c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1465 c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1466 c29fdfc1Swdenk compressed images are supported. 1467 c29fdfc1Swdenk 1468 c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1469 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1470 c29fdfc1Swdenk be at least 4MB. 1471 d791b1dcSwdenk 1472 fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1473 fc9c1727SLuigi 'Comio' Mantellini 1474 fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1475 fc9c1727SLuigi 'Comio' Mantellini images is included. 1476 fc9c1727SLuigi 'Comio' Mantellini 1477 fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1478 fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1479 fc9c1727SLuigi 'Comio' Mantellini formula: 1480 fc9c1727SLuigi 'Comio' Mantellini 1481 fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1482 fc9c1727SLuigi 'Comio' Mantellini 1483 fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1484 fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1485 fc9c1727SLuigi 'Comio' Mantellini 1486 fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1487 fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1488 fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1489 fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1490 fc9c1727SLuigi 'Comio' Mantellini 1491 fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1492 fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 1493 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1494 fc9c1727SLuigi 'Comio' Mantellini 1495 17ea1177Swdenk- MII/PHY support: 1496 17ea1177Swdenk CONFIG_PHY_ADDR 1497 17ea1177Swdenk 1498 17ea1177Swdenk The address of PHY on MII bus. 1499 17ea1177Swdenk 1500 17ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 1501 17ea1177Swdenk 1502 17ea1177Swdenk The clock frequency of the MII bus 1503 17ea1177Swdenk 1504 17ea1177Swdenk CONFIG_PHY_GIGE 1505 17ea1177Swdenk 1506 17ea1177Swdenk If this option is set, support for speed/duplex 1507 11ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 1508 17ea1177Swdenk 1509 17ea1177Swdenk CONFIG_PHY_RESET_DELAY 1510 17ea1177Swdenk 1511 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1512 17ea1177Swdenk reset before any MII register access is possible. 1513 17ea1177Swdenk For such PHY, set this option to the usec delay 1514 17ea1177Swdenk required. (minimum 300usec for LXT971A) 1515 17ea1177Swdenk 1516 17ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 1517 17ea1177Swdenk 1518 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1519 17ea1177Swdenk command issued before MII status register can be read 1520 17ea1177Swdenk 1521 c609719bSwdenk- Ethernet address: 1522 c609719bSwdenk CONFIG_ETHADDR 1523 c68a05feSrichardretanubun CONFIG_ETH1ADDR 1524 c609719bSwdenk CONFIG_ETH2ADDR 1525 c609719bSwdenk CONFIG_ETH3ADDR 1526 c68a05feSrichardretanubun CONFIG_ETH4ADDR 1527 c68a05feSrichardretanubun CONFIG_ETH5ADDR 1528 c609719bSwdenk 1529 11ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 1530 11ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1531 c609719bSwdenk is not determined automatically. 1532 c609719bSwdenk 1533 c609719bSwdenk- IP address: 1534 c609719bSwdenk CONFIG_IPADDR 1535 c609719bSwdenk 1536 c609719bSwdenk Define a default value for the IP address to use for 1537 11ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1538 c609719bSwdenk determined through e.g. bootp. 1539 1ebcd654SWolfgang Denk (Environment variable "ipaddr") 1540 c609719bSwdenk 1541 c609719bSwdenk- Server IP address: 1542 c609719bSwdenk CONFIG_SERVERIP 1543 c609719bSwdenk 1544 c609719bSwdenk Defines a default value for the IP address of a TFTP 1545 c609719bSwdenk server to contact when using the "tftboot" command. 1546 1ebcd654SWolfgang Denk (Environment variable "serverip") 1547 c609719bSwdenk 1548 97cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 1549 97cfe861SRobin Getz 1550 97cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 1551 97cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 1552 97cfe861SRobin Getz 1553 1ebcd654SWolfgang Denk- Gateway IP address: 1554 1ebcd654SWolfgang Denk CONFIG_GATEWAYIP 1555 1ebcd654SWolfgang Denk 1556 1ebcd654SWolfgang Denk Defines a default value for the IP address of the 1557 1ebcd654SWolfgang Denk default router where packets to other networks are 1558 1ebcd654SWolfgang Denk sent to. 1559 1ebcd654SWolfgang Denk (Environment variable "gatewayip") 1560 1ebcd654SWolfgang Denk 1561 1ebcd654SWolfgang Denk- Subnet mask: 1562 1ebcd654SWolfgang Denk CONFIG_NETMASK 1563 1ebcd654SWolfgang Denk 1564 1ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 1565 1ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 1566 1ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 1567 1ebcd654SWolfgang Denk forwarded through a router. 1568 1ebcd654SWolfgang Denk (Environment variable "netmask") 1569 1ebcd654SWolfgang Denk 1570 53a5c424SDavid Updegraff- Multicast TFTP Mode: 1571 53a5c424SDavid Updegraff CONFIG_MCAST_TFTP 1572 53a5c424SDavid Updegraff 1573 53a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 1574 53a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 1575 11ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 1576 53a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 1577 53a5c424SDavid Updegraff multicast group. 1578 53a5c424SDavid Updegraff 1579 c609719bSwdenk- BOOTP Recovery Mode: 1580 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1581 c609719bSwdenk 1582 c609719bSwdenk If you have many targets in a network that try to 1583 c609719bSwdenk boot using BOOTP, you may want to avoid that all 1584 c609719bSwdenk systems send out BOOTP requests at precisely the same 1585 c609719bSwdenk moment (which would happen for instance at recovery 1586 c609719bSwdenk from a power failure, when all systems will try to 1587 c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1588 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1589 c609719bSwdenk inserted before sending out BOOTP requests. The 1590 6c33c785SWolfgang Denk following delays are inserted then: 1591 c609719bSwdenk 1592 c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1593 c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1594 c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1595 c609719bSwdenk 4th and following 1596 c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1597 c609719bSwdenk 1598 fe389a82Sstroese- DHCP Advanced Options: 1599 1fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 1600 1fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1601 fe389a82Sstroese 1602 1fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 1603 1fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 1604 1fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 1605 1fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 1606 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 1607 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 1608 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS 1609 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 1610 1fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 1611 1fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 1612 1fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 1613 1fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1614 2c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL 1615 fe389a82Sstroese 1616 5d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 1617 5d110f0aSWilson Callan environment variable, not the BOOTP server. 1618 fe389a82Sstroese 1619 2c00e099SJoe Hershberger CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found 1620 2c00e099SJoe Hershberger after the configured retry count, the call will fail 1621 2c00e099SJoe Hershberger instead of starting over. This can be used to fail over 1622 2c00e099SJoe Hershberger to Link-local IP address configuration if the DHCP server 1623 2c00e099SJoe Hershberger is not available. 1624 2c00e099SJoe Hershberger 1625 fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1626 fe389a82Sstroese serverip from a DHCP server, it is possible that more 1627 fe389a82Sstroese than one DNS serverip is offered to the client. 1628 fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1629 fe389a82Sstroese serverip will be stored in the additional environment 1630 fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1631 fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 1632 1fe80d79SJon Loeliger is defined. 1633 fe389a82Sstroese 1634 fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1635 fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1636 fe389a82Sstroese need the hostname of the DHCP requester. 1637 5d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 1638 1fe80d79SJon Loeliger of the "hostname" environment variable is passed as 1639 1fe80d79SJon Loeliger option 12 to the DHCP server. 1640 fe389a82Sstroese 1641 d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1642 d9a2f416SAras Vaichas 1643 d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1644 d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1645 d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1646 d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1647 d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1648 d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1649 d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1650 d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1651 d9a2f416SAras Vaichas that one of the retries will be successful but note that 1652 d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1653 d9a2f416SAras Vaichas this delay. 1654 d9a2f416SAras Vaichas 1655 d22c338eSJoe Hershberger - Link-local IP address negotiation: 1656 d22c338eSJoe Hershberger Negotiate with other link-local clients on the local network 1657 d22c338eSJoe Hershberger for an address that doesn't require explicit configuration. 1658 d22c338eSJoe Hershberger This is especially useful if a DHCP server cannot be guaranteed 1659 d22c338eSJoe Hershberger to exist in all environments that the device must operate. 1660 d22c338eSJoe Hershberger 1661 d22c338eSJoe Hershberger See doc/README.link-local for more information. 1662 d22c338eSJoe Hershberger 1663 a3d991bdSwdenk - CDP Options: 1664 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1665 a3d991bdSwdenk 1666 a3d991bdSwdenk The device id used in CDP trigger frames. 1667 a3d991bdSwdenk 1668 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1669 a3d991bdSwdenk 1670 a3d991bdSwdenk A two character string which is prefixed to the MAC address 1671 a3d991bdSwdenk of the device. 1672 a3d991bdSwdenk 1673 a3d991bdSwdenk CONFIG_CDP_PORT_ID 1674 a3d991bdSwdenk 1675 a3d991bdSwdenk A printf format string which contains the ascii name of 1676 a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1677 11ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1678 a3d991bdSwdenk 1679 a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1680 a3d991bdSwdenk 1681 a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1682 a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1683 a3d991bdSwdenk 1684 a3d991bdSwdenk CONFIG_CDP_VERSION 1685 a3d991bdSwdenk 1686 a3d991bdSwdenk An ascii string containing the version of the software. 1687 a3d991bdSwdenk 1688 a3d991bdSwdenk CONFIG_CDP_PLATFORM 1689 a3d991bdSwdenk 1690 a3d991bdSwdenk An ascii string containing the name of the platform. 1691 a3d991bdSwdenk 1692 a3d991bdSwdenk CONFIG_CDP_TRIGGER 1693 a3d991bdSwdenk 1694 a3d991bdSwdenk A 32bit integer sent on the trigger. 1695 a3d991bdSwdenk 1696 a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1697 a3d991bdSwdenk 1698 a3d991bdSwdenk A 16bit integer containing the power consumption of the 1699 a3d991bdSwdenk device in .1 of milliwatts. 1700 a3d991bdSwdenk 1701 a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1702 a3d991bdSwdenk 1703 a3d991bdSwdenk A byte containing the id of the VLAN. 1704 a3d991bdSwdenk 1705 c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1706 c609719bSwdenk 1707 c609719bSwdenk Several configurations allow to display the current 1708 c609719bSwdenk status using a LED. For instance, the LED will blink 1709 c609719bSwdenk fast while running U-Boot code, stop blinking as 1710 c609719bSwdenk soon as a reply to a BOOTP request was received, and 1711 c609719bSwdenk start blinking slow once the Linux kernel is running 1712 c609719bSwdenk (supported by a status LED driver in the Linux 1713 c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1714 c609719bSwdenk feature in U-Boot. 1715 c609719bSwdenk 1716 c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1717 c609719bSwdenk 1718 c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1719 c609719bSwdenk on those systems that support this (optional) 1720 c609719bSwdenk feature, like the TQM8xxL modules. 1721 c609719bSwdenk 1722 c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1723 c609719bSwdenk 1724 b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1725 b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1726 11ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1727 c609719bSwdenk 1728 b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1729 602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1730 b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1731 b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1732 c609719bSwdenk command line interface. 1733 c609719bSwdenk 1734 bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1735 c609719bSwdenk 1736 b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1737 b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1738 b37c7e5eSwdenk support for I2C. 1739 c609719bSwdenk 1740 b37c7e5eSwdenk There are several other quantities that must also be 1741 b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1742 c609719bSwdenk 1743 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1744 b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1745 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 1746 11ccc33fSMarcel Ziswiler the CPU's i2c node address). 1747 c609719bSwdenk 1748 8d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1749 a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 1750 8d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 1751 8d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 1752 8d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1753 b37c7e5eSwdenk 1754 5da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 1755 5da71efaSEric Millbrandt 1756 5da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 1757 5da71efaSEric Millbrandt chips might think that the current transfer is still 1758 5da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 1759 5da71efaSEric Millbrandt commands until the slave device responds. 1760 5da71efaSEric Millbrandt 1761 b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1762 b37c7e5eSwdenk 1763 b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1764 b37c7e5eSwdenk then the following macros need to be defined (examples are 1765 b37c7e5eSwdenk from include/configs/lwmon.h): 1766 c609719bSwdenk 1767 c609719bSwdenk I2C_INIT 1768 c609719bSwdenk 1769 b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1770 c609719bSwdenk controller or configure ports. 1771 c609719bSwdenk 1772 b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1773 b37c7e5eSwdenk 1774 c609719bSwdenk I2C_PORT 1775 c609719bSwdenk 1776 c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1777 c609719bSwdenk assumes both bits are on the same port). Valid values 1778 c609719bSwdenk are 0..3 for ports A..D. 1779 c609719bSwdenk 1780 c609719bSwdenk I2C_ACTIVE 1781 c609719bSwdenk 1782 c609719bSwdenk The code necessary to make the I2C data line active 1783 c609719bSwdenk (driven). If the data line is open collector, this 1784 c609719bSwdenk define can be null. 1785 c609719bSwdenk 1786 b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1787 b37c7e5eSwdenk 1788 c609719bSwdenk I2C_TRISTATE 1789 c609719bSwdenk 1790 c609719bSwdenk The code necessary to make the I2C data line tri-stated 1791 c609719bSwdenk (inactive). If the data line is open collector, this 1792 c609719bSwdenk define can be null. 1793 c609719bSwdenk 1794 b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1795 b37c7e5eSwdenk 1796 c609719bSwdenk I2C_READ 1797 c609719bSwdenk 1798 c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1799 c609719bSwdenk FALSE if it is low. 1800 c609719bSwdenk 1801 b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1802 b37c7e5eSwdenk 1803 c609719bSwdenk I2C_SDA(bit) 1804 c609719bSwdenk 1805 c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1806 c609719bSwdenk is FALSE, it clears it (low). 1807 c609719bSwdenk 1808 b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1809 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1810 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1811 b37c7e5eSwdenk 1812 c609719bSwdenk I2C_SCL(bit) 1813 c609719bSwdenk 1814 c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1815 c609719bSwdenk is FALSE, it clears it (low). 1816 c609719bSwdenk 1817 b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1818 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1819 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1820 b37c7e5eSwdenk 1821 c609719bSwdenk I2C_DELAY 1822 c609719bSwdenk 1823 c609719bSwdenk This delay is invoked four times per clock cycle so this 1824 c609719bSwdenk controls the rate of data transfer. The data rate thus 1825 b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1826 b37c7e5eSwdenk like: 1827 b37c7e5eSwdenk 1828 b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1829 c609719bSwdenk 1830 793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1831 793b5726SMike Frysinger 1832 793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1833 793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1834 793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1835 793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1836 793b5726SMike Frysinger 1837 793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1838 793b5726SMike Frysinger the generic GPIO functions. 1839 793b5726SMike Frysinger 1840 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 1841 47cd00faSwdenk 1842 47cd00faSwdenk When a board is reset during an i2c bus transfer 1843 47cd00faSwdenk chips might think that the current transfer is still 1844 47cd00faSwdenk in progress. On some boards it is possible to access 1845 47cd00faSwdenk the i2c SCLK line directly, either by using the 1846 47cd00faSwdenk processor pin as a GPIO or by having a second pin 1847 47cd00faSwdenk connected to the bus. If this option is defined a 1848 47cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 1849 47cd00faSwdenk is run early in the boot sequence. 1850 47cd00faSwdenk 1851 26a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 1852 26a33504SRichard Retanubun 1853 26a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 1854 26a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 1855 26a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 1856 26a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 1857 26a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 1858 26a33504SRichard Retanubun controller provide such a method. It is called at the end of 1859 26a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 1860 26a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 1861 26a33504SRichard Retanubun 1862 17ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 1863 17ea1177Swdenk 1864 17ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 1865 17ea1177Swdenk in u-boot bd_info structure based on u-boot environment 1866 17ea1177Swdenk variable "i2cfast". (see also i2cfast) 1867 17ea1177Swdenk 1868 bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1869 bb99ad6dSBen Warren 1870 bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1871 bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1872 bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1873 bb99ad6dSBen Warren Note that bus numbering is zero-based. 1874 bb99ad6dSBen Warren 1875 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1876 bb99ad6dSBen Warren 1877 bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1878 0f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 1879 0f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 1880 0f89c54bSPeter Tyser a 1D array of device addresses 1881 bb99ad6dSBen Warren 1882 bb99ad6dSBen Warren e.g. 1883 bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1884 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1885 bb99ad6dSBen Warren 1886 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1887 bb99ad6dSBen Warren 1888 bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1889 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1890 bb99ad6dSBen Warren 1891 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1892 bb99ad6dSBen Warren 1893 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1894 be5e6181STimur Tabi 1895 be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1896 be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1897 be5e6181STimur Tabi 1898 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 1899 0dc018ecSStefan Roese 1900 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 1901 0dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 1902 0dc018ecSStefan Roese 1903 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 1904 0dc018ecSStefan Roese 1905 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 1906 0dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 1907 0dc018ecSStefan Roese 1908 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 1909 9ebbb54fSVictor Gallardo 1910 9ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 1911 9ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 1912 9ebbb54fSVictor Gallardo specified DTT device. 1913 9ebbb54fSVictor Gallardo 1914 be5e6181STimur Tabi CONFIG_FSL_I2C 1915 be5e6181STimur Tabi 1916 be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 1917 7817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1918 be5e6181STimur Tabi 1919 67b23a32SHeiko Schocher CONFIG_I2C_MUX 1920 67b23a32SHeiko Schocher 1921 67b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 1922 67b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 1923 67b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 1924 67b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 1925 67b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 1926 67b23a32SHeiko Schocher the muxes to activate this new "bus". 1927 67b23a32SHeiko Schocher 1928 67b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 1929 67b23a32SHeiko Schocher feature! 1930 67b23a32SHeiko Schocher 1931 67b23a32SHeiko Schocher Example: 1932 67b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 1933 67b23a32SHeiko Schocher The First mux with address 70 and channel 6 1934 67b23a32SHeiko Schocher The Second mux with address 71 and channel 4 1935 67b23a32SHeiko Schocher 1936 67b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 1937 67b23a32SHeiko Schocher 1938 67b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 1939 67b23a32SHeiko Schocher of I2C Busses with muxes: 1940 67b23a32SHeiko Schocher 1941 67b23a32SHeiko Schocher => i2c bus 1942 67b23a32SHeiko Schocher Busses reached over muxes: 1943 67b23a32SHeiko Schocher Bus ID: 2 1944 67b23a32SHeiko Schocher reached over Mux(es): 1945 67b23a32SHeiko Schocher pca9544a@70 ch: 4 1946 67b23a32SHeiko Schocher Bus ID: 3 1947 67b23a32SHeiko Schocher reached over Mux(es): 1948 67b23a32SHeiko Schocher pca9544a@70 ch: 6 1949 67b23a32SHeiko Schocher pca9544a@71 ch: 4 1950 67b23a32SHeiko Schocher => 1951 67b23a32SHeiko Schocher 1952 67b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1953 f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1954 f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 1955 67b23a32SHeiko Schocher the channel 4. 1956 67b23a32SHeiko Schocher 1957 67b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1958 f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 1959 67b23a32SHeiko Schocher the 2 muxes. 1960 67b23a32SHeiko Schocher 1961 67b23a32SHeiko Schocher This option is actually implemented for the bitbanging 1962 67b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 1963 67b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 1964 67b23a32SHeiko Schocher to add this option to other architectures. 1965 67b23a32SHeiko Schocher 1966 2ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 1967 2ac6985aSAndrew Dyer 1968 2ac6985aSAndrew Dyer defining this will force the i2c_read() function in 1969 2ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 1970 2ac6985aSAndrew Dyer between writing the address pointer and reading the 1971 2ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 1972 2ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 1973 2ac6985aSAndrew Dyer devices can use either method, but some require one or 1974 2ac6985aSAndrew Dyer the other. 1975 be5e6181STimur Tabi 1976 c609719bSwdenk- SPI Support: CONFIG_SPI 1977 c609719bSwdenk 1978 c609719bSwdenk Enables SPI driver (so far only tested with 1979 c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1980 c609719bSwdenk D/As on the SACSng board) 1981 c609719bSwdenk 1982 6639562eSYoshihiro Shimoda CONFIG_SH_SPI 1983 6639562eSYoshihiro Shimoda 1984 6639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 1985 6639562eSYoshihiro Shimoda only SH7757 is supported. 1986 6639562eSYoshihiro Shimoda 1987 c609719bSwdenk CONFIG_SPI_X 1988 c609719bSwdenk 1989 c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1990 c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1991 c609719bSwdenk 1992 c609719bSwdenk CONFIG_SOFT_SPI 1993 c609719bSwdenk 1994 c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1995 c609719bSwdenk using hardware support. This is a general purpose 1996 c609719bSwdenk driver that only requires three general I/O port pins 1997 c609719bSwdenk (two outputs, one input) to function. If this is 1998 c609719bSwdenk defined, the board configuration must define several 1999 c609719bSwdenk SPI configuration items (port pins to use, etc). For 2000 c609719bSwdenk an example, see include/configs/sacsng.h. 2001 c609719bSwdenk 2002 04a9e118SBen Warren CONFIG_HARD_SPI 2003 04a9e118SBen Warren 2004 04a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 2005 04a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 2006 04a9e118SBen Warren must define a list of chip-select function pointers. 2007 04a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 2008 04a9e118SBen Warren example, see include/configs/mpc8349emds.h. 2009 04a9e118SBen Warren 2010 38254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 2011 38254f45SGuennadi Liakhovetski 2012 38254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 2013 2e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 2014 38254f45SGuennadi Liakhovetski 2015 0133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 2016 0133502eSMatthias Fuchs 2017 0133502eSMatthias Fuchs Enables FPGA subsystem. 2018 0133502eSMatthias Fuchs 2019 0133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 2020 0133502eSMatthias Fuchs 2021 0133502eSMatthias Fuchs Enables support for specific chip vendors. 2022 0133502eSMatthias Fuchs (ALTERA, XILINX) 2023 0133502eSMatthias Fuchs 2024 0133502eSMatthias Fuchs CONFIG_FPGA_<family> 2025 0133502eSMatthias Fuchs 2026 0133502eSMatthias Fuchs Enables support for FPGA family. 2027 0133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 2028 0133502eSMatthias Fuchs 2029 0133502eSMatthias Fuchs CONFIG_FPGA_COUNT 2030 c609719bSwdenk 2031 c609719bSwdenk Specify the number of FPGA devices to support. 2032 c609719bSwdenk 2033 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 2034 c609719bSwdenk 2035 c609719bSwdenk Enable printing of hash marks during FPGA configuration. 2036 c609719bSwdenk 2037 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 2038 c609719bSwdenk 2039 c609719bSwdenk Enable checks on FPGA configuration interface busy 2040 c609719bSwdenk status by the configuration function. This option 2041 c609719bSwdenk will require a board or device specific function to 2042 c609719bSwdenk be written. 2043 c609719bSwdenk 2044 c609719bSwdenk CONFIG_FPGA_DELAY 2045 c609719bSwdenk 2046 c609719bSwdenk If defined, a function that provides delays in the FPGA 2047 c609719bSwdenk configuration driver. 2048 c609719bSwdenk 2049 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2050 c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2051 c609719bSwdenk 2052 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2053 c609719bSwdenk 2054 c609719bSwdenk Check for configuration errors during FPGA bitfile 2055 c609719bSwdenk loading. For example, abort during Virtex II 2056 c609719bSwdenk configuration if the INIT_B line goes low (which 2057 c609719bSwdenk indicated a CRC error). 2058 c609719bSwdenk 2059 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2060 c609719bSwdenk 2061 c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2062 c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2063 c609719bSwdenk FPGA configuration sequence. The default time is 500 2064 11ccc33fSMarcel Ziswiler ms. 2065 c609719bSwdenk 2066 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2067 c609719bSwdenk 2068 c609719bSwdenk Maximum time to wait for BUSY to deassert during 2069 11ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2070 c609719bSwdenk 2071 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2072 c609719bSwdenk 2073 c609719bSwdenk Time to wait after FPGA configuration. The default is 2074 11ccc33fSMarcel Ziswiler 200 ms. 2075 c609719bSwdenk 2076 c609719bSwdenk- Configuration Management: 2077 c609719bSwdenk CONFIG_IDENT_STRING 2078 c609719bSwdenk 2079 c609719bSwdenk If defined, this string will be added to the U-Boot 2080 c609719bSwdenk version information (U_BOOT_VERSION) 2081 c609719bSwdenk 2082 c609719bSwdenk- Vendor Parameter Protection: 2083 c609719bSwdenk 2084 c609719bSwdenk U-Boot considers the values of the environment 2085 c609719bSwdenk variables "serial#" (Board Serial Number) and 2086 7152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2087 c609719bSwdenk are set once by the board vendor / manufacturer, and 2088 c609719bSwdenk protects these variables from casual modification by 2089 c609719bSwdenk the user. Once set, these variables are read-only, 2090 c609719bSwdenk and write or delete attempts are rejected. You can 2091 11ccc33fSMarcel Ziswiler change this behaviour: 2092 c609719bSwdenk 2093 c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2094 c609719bSwdenk file, the write protection for vendor parameters is 2095 47cd00faSwdenk completely disabled. Anybody can change or delete 2096 c609719bSwdenk these parameters. 2097 c609719bSwdenk 2098 c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2099 c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 2100 11ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2101 c609719bSwdenk which can be changed exactly ONCE by the user. [The 2102 c609719bSwdenk serial# is unaffected by this, i. e. it remains 2103 c609719bSwdenk read-only.] 2104 c609719bSwdenk 2105 c609719bSwdenk- Protected RAM: 2106 c609719bSwdenk CONFIG_PRAM 2107 c609719bSwdenk 2108 c609719bSwdenk Define this variable to enable the reservation of 2109 c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2110 c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2111 c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2112 c609719bSwdenk this default value by defining an environment 2113 c609719bSwdenk variable "pram" to the number of kB you want to 2114 c609719bSwdenk reserve. Note that the board info structure will 2115 c609719bSwdenk still show the full amount of RAM. If pRAM is 2116 c609719bSwdenk reserved, a new environment variable "mem" will 2117 c609719bSwdenk automatically be defined to hold the amount of 2118 c609719bSwdenk remaining RAM in a form that can be passed as boot 2119 c609719bSwdenk argument to Linux, for instance like that: 2120 c609719bSwdenk 2121 fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2122 c609719bSwdenk saveenv 2123 c609719bSwdenk 2124 c609719bSwdenk This way you can tell Linux not to use this memory, 2125 c609719bSwdenk either, which results in a memory region that will 2126 c609719bSwdenk not be affected by reboots. 2127 c609719bSwdenk 2128 c609719bSwdenk *WARNING* If your board configuration uses automatic 2129 c609719bSwdenk detection of the RAM size, you must make sure that 2130 c609719bSwdenk this memory test is non-destructive. So far, the 2131 c609719bSwdenk following board configurations are known to be 2132 c609719bSwdenk "pRAM-clean": 2133 c609719bSwdenk 2134 c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 2135 c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 2136 544d97e9SWolfgang Denk FLAGADM, TQM8260 2137 c609719bSwdenk 2138 c609719bSwdenk- Error Recovery: 2139 c609719bSwdenk CONFIG_PANIC_HANG 2140 c609719bSwdenk 2141 c609719bSwdenk Define this variable to stop the system in case of a 2142 c609719bSwdenk fatal error, so that you have to reset it manually. 2143 c609719bSwdenk This is probably NOT a good idea for an embedded 2144 11ccc33fSMarcel Ziswiler system where you want the system to reboot 2145 c609719bSwdenk automatically as fast as possible, but it may be 2146 c609719bSwdenk useful during development since you can try to debug 2147 c609719bSwdenk the conditions that lead to the situation. 2148 c609719bSwdenk 2149 c609719bSwdenk CONFIG_NET_RETRY_COUNT 2150 c609719bSwdenk 2151 c609719bSwdenk This variable defines the number of retries for 2152 c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2153 c609719bSwdenk before giving up the operation. If not defined, a 2154 c609719bSwdenk default value of 5 is used. 2155 c609719bSwdenk 2156 40cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 2157 40cb90eeSGuennadi Liakhovetski 2158 40cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 2159 40cb90eeSGuennadi Liakhovetski 2160 48a3e999STetsuyuki Kobayashi CONFIG_NFS_TIMEOUT 2161 48a3e999STetsuyuki Kobayashi 2162 48a3e999STetsuyuki Kobayashi Timeout in milliseconds used in NFS protocol. 2163 48a3e999STetsuyuki Kobayashi If you encounter "ERROR: Cannot umount" in nfs command, 2164 48a3e999STetsuyuki Kobayashi try longer timeout such as 2165 48a3e999STetsuyuki Kobayashi #define CONFIG_NFS_TIMEOUT 10000UL 2166 48a3e999STetsuyuki Kobayashi 2167 c609719bSwdenk- Command Interpreter: 2168 8078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 2169 04a85b3bSwdenk 2170 04a85b3bSwdenk Enable auto completion of commands using TAB. 2171 04a85b3bSwdenk 2172 8078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 2173 8078f1a5SWolfgang Denk for the "hush" shell. 2174 8078f1a5SWolfgang Denk 2175 8078f1a5SWolfgang Denk 2176 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2177 c609719bSwdenk 2178 c609719bSwdenk Define this variable to enable the "hush" shell (from 2179 c609719bSwdenk Busybox) as command line interpreter, thus enabling 2180 c609719bSwdenk powerful command line syntax like 2181 c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2182 c609719bSwdenk constructs ("shell scripts"). 2183 c609719bSwdenk 2184 c609719bSwdenk If undefined, you get the old, much simpler behaviour 2185 c609719bSwdenk with a somewhat smaller memory footprint. 2186 c609719bSwdenk 2187 c609719bSwdenk 2188 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2189 c609719bSwdenk 2190 c609719bSwdenk This defines the secondary prompt string, which is 2191 c609719bSwdenk printed when the command interpreter needs more input 2192 c609719bSwdenk to complete a command. Usually "> ". 2193 c609719bSwdenk 2194 c609719bSwdenk Note: 2195 c609719bSwdenk 2196 c609719bSwdenk In the current implementation, the local variables 2197 c609719bSwdenk space and global environment variables space are 2198 c609719bSwdenk separated. Local variables are those you define by 2199 3b57fe0aSwdenk simply typing `name=value'. To access a local 2200 c609719bSwdenk variable later on, you have write `$name' or 2201 3b57fe0aSwdenk `${name}'; to execute the contents of a variable 2202 3b57fe0aSwdenk directly type `$name' at the command prompt. 2203 c609719bSwdenk 2204 c609719bSwdenk Global environment variables are those you use 2205 c609719bSwdenk setenv/printenv to work with. To run a command stored 2206 c609719bSwdenk in such a variable, you need to use the run command, 2207 c609719bSwdenk and you must not use the '$' sign to access them. 2208 c609719bSwdenk 2209 c609719bSwdenk To store commands and special characters in a 2210 c609719bSwdenk variable, please use double quotation marks 2211 c609719bSwdenk surrounding the whole text of the variable, instead 2212 c609719bSwdenk of the backslashes before semicolons and special 2213 c609719bSwdenk symbols. 2214 c609719bSwdenk 2215 aa0c71acSWolfgang Denk- Commandline Editing and History: 2216 aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2217 aa0c71acSWolfgang Denk 2218 11ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2219 aa0c71acSWolfgang Denk commandline input operations 2220 aa0c71acSWolfgang Denk 2221 a8c7c708Swdenk- Default Environment: 2222 c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2223 c609719bSwdenk 2224 c609719bSwdenk Define this to contain any number of null terminated 2225 c609719bSwdenk strings (variable = value pairs) that will be part of 2226 7152b1d0Swdenk the default environment compiled into the boot image. 2227 2262cfeeSwdenk 2228 c609719bSwdenk For example, place something like this in your 2229 c609719bSwdenk board's config file: 2230 c609719bSwdenk 2231 c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2232 c609719bSwdenk "myvar1=value1\0" \ 2233 c609719bSwdenk "myvar2=value2\0" 2234 c609719bSwdenk 2235 c609719bSwdenk Warning: This method is based on knowledge about the 2236 c609719bSwdenk internal format how the environment is stored by the 2237 2262cfeeSwdenk U-Boot code. This is NOT an official, exported 2238 c609719bSwdenk interface! Although it is unlikely that this format 2239 7152b1d0Swdenk will change soon, there is no guarantee either. 2240 c609719bSwdenk You better know what you are doing here. 2241 c609719bSwdenk 2242 c609719bSwdenk Note: overly (ab)use of the default environment is 2243 c609719bSwdenk discouraged. Make sure to check other ways to preset 2244 74de7aefSWolfgang Denk the environment like the "source" command or the 2245 c609719bSwdenk boot command first. 2246 c609719bSwdenk 2247 5e724ca2SStephen Warren CONFIG_ENV_VARS_UBOOT_CONFIG 2248 5e724ca2SStephen Warren 2249 5e724ca2SStephen Warren Define this in order to add variables describing the 2250 5e724ca2SStephen Warren U-Boot build configuration to the default environment. 2251 5e724ca2SStephen Warren These will be named arch, cpu, board, vendor, and soc. 2252 5e724ca2SStephen Warren 2253 5e724ca2SStephen Warren Enabling this option will cause the following to be defined: 2254 5e724ca2SStephen Warren 2255 5e724ca2SStephen Warren - CONFIG_SYS_ARCH 2256 5e724ca2SStephen Warren - CONFIG_SYS_CPU 2257 5e724ca2SStephen Warren - CONFIG_SYS_BOARD 2258 5e724ca2SStephen Warren - CONFIG_SYS_VENDOR 2259 5e724ca2SStephen Warren - CONFIG_SYS_SOC 2260 5e724ca2SStephen Warren 2261 a8c7c708Swdenk- DataFlash Support: 2262 2abbe075Swdenk CONFIG_HAS_DATAFLASH 2263 2abbe075Swdenk 2264 2abbe075Swdenk Defining this option enables DataFlash features and 2265 2abbe075Swdenk allows to read/write in Dataflash via the standard 2266 2abbe075Swdenk commands cp, md... 2267 2abbe075Swdenk 2268 f61ec45eSEric Nelson- Serial Flash support 2269 f61ec45eSEric Nelson CONFIG_CMD_SF 2270 f61ec45eSEric Nelson 2271 f61ec45eSEric Nelson Defining this option enables SPI flash commands 2272 f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2273 f61ec45eSEric Nelson 2274 f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2275 f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2276 f61ec45eSEric Nelson commands. 2277 f61ec45eSEric Nelson 2278 f61ec45eSEric Nelson The following defaults may be provided by the platform 2279 f61ec45eSEric Nelson to handle the common case when only a single serial 2280 f61ec45eSEric Nelson flash is present on the system. 2281 f61ec45eSEric Nelson 2282 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2283 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2284 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2285 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2286 f61ec45eSEric Nelson 2287 3f85ce27Swdenk- SystemACE Support: 2288 3f85ce27Swdenk CONFIG_SYSTEMACE 2289 3f85ce27Swdenk 2290 3f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 2291 3f85ce27Swdenk chips attached via some sort of local bus. The address 2292 11ccc33fSMarcel Ziswiler of the chip must also be defined in the 2293 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 2294 3f85ce27Swdenk 2295 3f85ce27Swdenk #define CONFIG_SYSTEMACE 2296 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 2297 3f85ce27Swdenk 2298 3f85ce27Swdenk When SystemACE support is added, the "ace" device type 2299 3f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 2300 3f85ce27Swdenk 2301 ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2302 ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2303 ecb0ccd9SWolfgang Denk 2304 28cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2305 ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 2306 28cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2307 ecb0ccd9SWolfgang Denk number generator is used. 2308 ecb0ccd9SWolfgang Denk 2309 28cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 2310 28cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 2311 28cb9375SWolfgang Denk defined, the normal port 69 is used. 2312 28cb9375SWolfgang Denk 2313 28cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2314 ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2315 ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2316 ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2317 ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2318 ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2319 ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2320 ecb0ccd9SWolfgang Denk 2321 a8c7c708Swdenk- Show boot progress: 2322 c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2323 c609719bSwdenk 2324 c609719bSwdenk Defining this option allows to add some board- 2325 c609719bSwdenk specific code (calling a user-provided function 2326 c609719bSwdenk "show_boot_progress(int)") that enables you to show 2327 c609719bSwdenk the system's boot progress on some display (for 2328 c609719bSwdenk example, some LED's) on your board. At the moment, 2329 c609719bSwdenk the following checkpoints are implemented: 2330 c609719bSwdenk 2331 3a608ca0SSimon Glass- Detailed boot stage timing 2332 3a608ca0SSimon Glass CONFIG_BOOTSTAGE 2333 3a608ca0SSimon Glass Define this option to get detailed timing of each stage 2334 3a608ca0SSimon Glass of the boot process. 2335 3a608ca0SSimon Glass 2336 3a608ca0SSimon Glass CONFIG_BOOTSTAGE_USER_COUNT 2337 3a608ca0SSimon Glass This is the number of available user bootstage records. 2338 3a608ca0SSimon Glass Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) 2339 3a608ca0SSimon Glass a new ID will be allocated from this stash. If you exceed 2340 3a608ca0SSimon Glass the limit, recording will stop. 2341 3a608ca0SSimon Glass 2342 3a608ca0SSimon Glass CONFIG_BOOTSTAGE_REPORT 2343 3a608ca0SSimon Glass Define this to print a report before boot, similar to this: 2344 3a608ca0SSimon Glass 2345 3a608ca0SSimon Glass Timer summary in microseconds: 2346 3a608ca0SSimon Glass Mark Elapsed Stage 2347 3a608ca0SSimon Glass 0 0 reset 2348 3a608ca0SSimon Glass 3,575,678 3,575,678 board_init_f start 2349 3a608ca0SSimon Glass 3,575,695 17 arch_cpu_init A9 2350 3a608ca0SSimon Glass 3,575,777 82 arch_cpu_init done 2351 3a608ca0SSimon Glass 3,659,598 83,821 board_init_r start 2352 3a608ca0SSimon Glass 3,910,375 250,777 main_loop 2353 3a608ca0SSimon Glass 29,916,167 26,005,792 bootm_start 2354 3a608ca0SSimon Glass 30,361,327 445,160 start_kernel 2355 3a608ca0SSimon Glass 2356 1372cce2SMarian BalakowiczLegacy uImage format: 2357 1372cce2SMarian Balakowicz 2358 c609719bSwdenk Arg Where When 2359 c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2360 c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2361 c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2362 c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2363 c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2364 c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2365 c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2366 c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2367 c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 2368 1372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2369 c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2370 c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2371 c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2372 c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 2373 1372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2374 c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 2375 1372cce2SMarian Balakowicz 2376 1372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 2377 1372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 2378 1372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 2379 1372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 2380 1372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 2381 1372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 2382 1372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 2383 11ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 2384 1372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 2385 1372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 2386 1372cce2SMarian Balakowicz 2387 ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2388 c609719bSwdenk 2389 a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 2390 63e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 2391 63e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 2392 63e73c9aSwdenk 2393 566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2394 566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2395 566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2396 566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2397 566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2398 566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2399 566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2400 566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2401 566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2402 566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2403 566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2404 566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2405 566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2406 566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2407 566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2408 566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2409 566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2410 566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2411 566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2412 566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2413 566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2414 566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2415 566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2416 566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2417 566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2418 566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2419 566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2420 566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2421 566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2422 566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2423 566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2424 566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2425 566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2426 566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2427 566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2428 566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2429 566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2430 566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2431 566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2432 566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2433 566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2434 566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2435 566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2436 566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2437 566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2438 566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2439 566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2440 c609719bSwdenk 2441 566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2442 c609719bSwdenk 2443 566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2444 566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2445 566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2446 206c60cbSwdenk 2447 566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2448 566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 2449 11ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2450 566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2451 566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2452 566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 2453 74de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 2454 74de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2455 566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2456 c609719bSwdenk 2457 1372cce2SMarian BalakowiczFIT uImage format: 2458 1372cce2SMarian Balakowicz 2459 1372cce2SMarian Balakowicz Arg Where When 2460 1372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 2461 1372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 2462 1372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 2463 1372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 2464 1372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 2465 1372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2466 f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 2467 1372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 2468 1372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 2469 1372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 2470 1372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 2471 1372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 2472 11ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 2473 11ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 2474 1372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 2475 1372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 2476 1372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 2477 1372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 2478 1372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 2479 1372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 2480 1372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 2481 1372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 2482 1372cce2SMarian Balakowicz 2483 1372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 2484 1372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 2485 1372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 2486 11ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 2487 1372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 2488 1372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 2489 1372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 2490 1372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 2491 1372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 2492 1372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 2493 1372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 2494 1372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 2495 1372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 2496 1372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 2497 1372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 2498 1372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 2499 1372cce2SMarian Balakowicz 2500 11ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 2501 1372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 2502 1372cce2SMarian Balakowicz 2503 11ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 2504 1372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 2505 1372cce2SMarian Balakowicz 2506 11ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 2507 1372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 2508 1372cce2SMarian Balakowicz 2509 4cf2609bSWolfgang Denk- Standalone program support: 2510 4cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 2511 4cf2609bSWolfgang Denk 2512 6feff899SWolfgang Denk This option defines a board specific value for the 2513 6feff899SWolfgang Denk address where standalone program gets loaded, thus 2514 6feff899SWolfgang Denk overwriting the architecture dependent default 2515 4cf2609bSWolfgang Denk settings. 2516 4cf2609bSWolfgang Denk 2517 4cf2609bSWolfgang Denk- Frame Buffer Address: 2518 4cf2609bSWolfgang Denk CONFIG_FB_ADDR 2519 4cf2609bSWolfgang Denk 2520 4cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 2521 4cf2609bSWolfgang Denk address for frame buffer. 2522 4cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 2523 4cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 2524 6feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 2525 4cf2609bSWolfgang Denk 2526 4cf2609bSWolfgang Denk Please see board_init_f function. 2527 4cf2609bSWolfgang Denk 2528 cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2529 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2530 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2531 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2532 cccfc2abSDetlev Zundel 2533 cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2534 cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2535 cccfc2abSDetlev Zundel 2536 cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2537 cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2538 cccfc2abSDetlev Zundel 2539 cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2540 cccfc2abSDetlev Zundel Needed for mtdparts command support. 2541 cccfc2abSDetlev Zundel 2542 cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2543 cccfc2abSDetlev Zundel 2544 cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2545 cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2546 cccfc2abSDetlev Zundel 2547 6a11cf48SDaniel Schwierzeck- SPL framework 2548 6a11cf48SDaniel Schwierzeck CONFIG_SPL 2549 6a11cf48SDaniel Schwierzeck Enable building of SPL globally. 2550 6a11cf48SDaniel Schwierzeck 2551 95579793STom Rini CONFIG_SPL_LDSCRIPT 2552 95579793STom Rini LDSCRIPT for linking the SPL binary. 2553 95579793STom Rini 2554 95579793STom Rini CONFIG_SPL_MAX_SIZE 2555 95579793STom Rini Maximum binary size (text, data and rodata) of the SPL binary. 2556 95579793STom Rini 2557 6a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 2558 6a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 2559 6a11cf48SDaniel Schwierzeck 2560 95579793STom Rini CONFIG_SPL_BSS_START_ADDR 2561 95579793STom Rini Link address for the BSS within the SPL binary. 2562 95579793STom Rini 2563 95579793STom Rini CONFIG_SPL_BSS_MAX_SIZE 2564 95579793STom Rini Maximum binary size of the BSS section of the SPL binary. 2565 95579793STom Rini 2566 95579793STom Rini CONFIG_SPL_STACK 2567 95579793STom Rini Adress of the start of the stack SPL will use 2568 95579793STom Rini 2569 95579793STom Rini CONFIG_SYS_SPL_MALLOC_START 2570 95579793STom Rini Starting address of the malloc pool used in SPL. 2571 95579793STom Rini 2572 95579793STom Rini CONFIG_SYS_SPL_MALLOC_SIZE 2573 95579793STom Rini The size of the malloc pool used in SPL. 2574 6a11cf48SDaniel Schwierzeck 2575 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 2576 6a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 2577 6a11cf48SDaniel Schwierzeck 2578 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 2579 6a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 2580 6a11cf48SDaniel Schwierzeck 2581 6a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 2582 6a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 2583 6a11cf48SDaniel Schwierzeck 2584 6a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 2585 6a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 2586 6a11cf48SDaniel Schwierzeck 2587 6a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 2588 6a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 2589 6a11cf48SDaniel Schwierzeck 2590 95579793STom Rini CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 2591 95579793STom Rini CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, 2592 95579793STom Rini CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 2593 95579793STom Rini Address, size and partition on the MMC to load U-Boot from 2594 95579793STom Rini when the MMC is being used in raw mode. 2595 95579793STom Rini 2596 95579793STom Rini CONFIG_SPL_FAT_SUPPORT 2597 95579793STom Rini Support for fs/fat/libfat.o in SPL binary 2598 95579793STom Rini 2599 95579793STom Rini CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME 2600 95579793STom Rini Filename to read to load U-Boot when reading from FAT 2601 95579793STom Rini 2602 95579793STom Rini CONFIG_SPL_NAND_SIMPLE 2603 95579793STom Rini Support for drivers/mtd/nand/libnand.o in SPL binary 2604 95579793STom Rini 2605 95579793STom Rini CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, 2606 95579793STom Rini CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, 2607 95579793STom Rini CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, 2608 95579793STom Rini CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, 2609 95579793STom Rini CONFIG_SYS_NAND_ECCBYTES 2610 95579793STom Rini Defines the size and behavior of the NAND that SPL uses 2611 95579793STom Rini to read U-Boot with CONFIG_SPL_NAND_SIMPLE 2612 95579793STom Rini 2613 95579793STom Rini CONFIG_SYS_NAND_U_BOOT_OFFS 2614 95579793STom Rini Location in NAND for CONFIG_SPL_NAND_SIMPLE to read U-Boot 2615 95579793STom Rini from. 2616 95579793STom Rini 2617 95579793STom Rini CONFIG_SYS_NAND_U_BOOT_START 2618 95579793STom Rini Location in memory for CONFIG_SPL_NAND_SIMPLE to load U-Boot 2619 95579793STom Rini to. 2620 95579793STom Rini 2621 95579793STom Rini CONFIG_SYS_NAND_HW_ECC_OOBFIRST 2622 95579793STom Rini Define this if you need to first read the OOB and then the 2623 95579793STom Rini data. This is used for example on davinci plattforms. 2624 95579793STom Rini 2625 95579793STom Rini CONFIG_SPL_OMAP3_ID_NAND 2626 95579793STom Rini Support for an OMAP3-specific set of functions to return the 2627 95579793STom Rini ID and MFR of the first attached NAND chip, if present. 2628 95579793STom Rini 2629 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 2630 6a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 2631 6a11cf48SDaniel Schwierzeck 2632 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 2633 6a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 2634 6a11cf48SDaniel Schwierzeck 2635 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 2636 6a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 2637 6a11cf48SDaniel Schwierzeck 2638 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 2639 6a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 2640 1372cce2SMarian Balakowicz 2641 c609719bSwdenkModem Support: 2642 c609719bSwdenk-------------- 2643 c609719bSwdenk 2644 566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2645 c609719bSwdenk 2646 11ccc33fSMarcel Ziswiler- Modem support enable: 2647 c609719bSwdenk CONFIG_MODEM_SUPPORT 2648 c609719bSwdenk 2649 c609719bSwdenk- RTS/CTS Flow control enable: 2650 c609719bSwdenk CONFIG_HWFLOW 2651 c609719bSwdenk 2652 c609719bSwdenk- Modem debug support: 2653 c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2654 c609719bSwdenk 2655 c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2656 c609719bSwdenk for modem support. Useful only with BDI2000. 2657 c609719bSwdenk 2658 a8c7c708Swdenk- Interrupt support (PPC): 2659 a8c7c708Swdenk 2660 a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2661 a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 2662 11ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2663 a8c7c708Swdenk should set decrementer_count to appropriate value. If 2664 11ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2665 a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 2666 11ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2667 a8c7c708Swdenk specific handling. If board has watchdog / status_led 2668 a8c7c708Swdenk / other_activity_monitor it works automatically from 2669 a8c7c708Swdenk general timer_interrupt(). 2670 a8c7c708Swdenk 2671 c609719bSwdenk- General: 2672 c609719bSwdenk 2673 c609719bSwdenk In the target system modem support is enabled when a 2674 c609719bSwdenk specific key (key combination) is pressed during 2675 c609719bSwdenk power-on. Otherwise U-Boot will boot normally 2676 11ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2677 c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2678 c609719bSwdenk function, returning 1 and thus enabling modem 2679 c609719bSwdenk initialization. 2680 c609719bSwdenk 2681 c609719bSwdenk If there are no modem init strings in the 2682 c609719bSwdenk environment, U-Boot proceed to autoboot; the 2683 c609719bSwdenk previous output (banner, info printfs) will be 2684 11ccc33fSMarcel Ziswiler suppressed, though. 2685 c609719bSwdenk 2686 c609719bSwdenk See also: doc/README.Modem 2687 c609719bSwdenk 2688 9660e442SHelmut RaigerBoard initialization settings: 2689 9660e442SHelmut Raiger------------------------------ 2690 9660e442SHelmut Raiger 2691 9660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 2692 9660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 2693 9660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 2694 9660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 2695 9660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 2696 9660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 2697 9660e442SHelmut Raiger 2698 9660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 2699 9660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 2700 9660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 2701 9660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2702 c609719bSwdenk 2703 c609719bSwdenkConfiguration Settings: 2704 c609719bSwdenk----------------------- 2705 c609719bSwdenk 2706 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2707 c609719bSwdenk undefine this when you're short of memory. 2708 c609719bSwdenk 2709 2fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 2710 2fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 2711 2fb2604dSPeter Tyser 2712 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2713 c609719bSwdenk prompt for user input. 2714 c609719bSwdenk 2715 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2716 c609719bSwdenk 2717 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2718 c609719bSwdenk 2719 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2720 c609719bSwdenk 2721 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2722 c609719bSwdenk the application (usually a Linux kernel) when it is 2723 c609719bSwdenk booted 2724 c609719bSwdenk 2725 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2726 c609719bSwdenk List of legal baudrate settings for this board. 2727 c609719bSwdenk 2728 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2729 c609719bSwdenk Suppress display of console information at boot. 2730 c609719bSwdenk 2731 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2732 c609719bSwdenk If the board specific function 2733 c609719bSwdenk extern int overwrite_console (void); 2734 c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2735 c609719bSwdenk serial port, else the settings in the environment are used. 2736 c609719bSwdenk 2737 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2738 c609719bSwdenk Enable the call to overwrite_console(). 2739 c609719bSwdenk 2740 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2741 c609719bSwdenk Enable overwrite of previous console environment settings. 2742 c609719bSwdenk 2743 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2744 c609719bSwdenk Begin and End addresses of the area used by the 2745 c609719bSwdenk simple memory test. 2746 c609719bSwdenk 2747 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2748 c609719bSwdenk Enable an alternate, more extensive memory test. 2749 c609719bSwdenk 2750 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 2751 5f535fe1Swdenk Scratch address used by the alternate memory test 2752 5f535fe1Swdenk You only need to set this if address zero isn't writeable 2753 5f535fe1Swdenk 2754 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 2755 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 2756 14f73ca6SStefan Roese this specified memory area will get subtracted from the top 2757 11ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 2758 14f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 2759 14f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 2760 14f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 2761 5e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 2762 14f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 2763 5e12e75dSStefan Roese will have to get fixed in Linux additionally. 2764 14f73ca6SStefan Roese 2765 14f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 2766 14f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 2767 14f73ca6SStefan Roese be touched. 2768 14f73ca6SStefan Roese 2769 14f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 2770 14f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 2771 14f73ca6SStefan Roese then the end address of the Linux memory will be located at a 2772 14f73ca6SStefan Roese non page size aligned address and this could cause major 2773 14f73ca6SStefan Roese problems. 2774 14f73ca6SStefan Roese 2775 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2776 c609719bSwdenk Default load address for network file downloads 2777 c609719bSwdenk 2778 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2779 c609719bSwdenk Enable temporary baudrate change while serial download 2780 c609719bSwdenk 2781 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2782 c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2783 c609719bSwdenk 2784 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2785 c609719bSwdenk Physical start address of Motherboard I/O (if using a 2786 c609719bSwdenk Cogent motherboard) 2787 c609719bSwdenk 2788 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2789 c609719bSwdenk Physical start address of Flash memory. 2790 c609719bSwdenk 2791 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2792 c609719bSwdenk Physical start address of boot monitor code (set by 2793 c609719bSwdenk make config files to be same as the text base address 2794 14d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 2795 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2796 c609719bSwdenk 2797 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 2798 3b57fe0aSwdenk Size of memory reserved for monitor code, used to 2799 3b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 2800 3b57fe0aSwdenk embedded within the U-Boot image, or in a separate 2801 3b57fe0aSwdenk flash sector. 2802 c609719bSwdenk 2803 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2804 c609719bSwdenk Size of DRAM reserved for malloc() use. 2805 c609719bSwdenk 2806 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 2807 15940c9aSStefan Roese Normally compressed uImages are limited to an 2808 15940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 2809 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 2810 15940c9aSStefan Roese to adjust this setting to your needs. 2811 c609719bSwdenk 2812 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2813 c609719bSwdenk Maximum size of memory mapped by the startup code of 2814 c609719bSwdenk the Linux kernel; all data that must be processed by 2815 7d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 2816 7d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 2817 7d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 2818 7d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2819 c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2820 c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2821 c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2822 c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2823 c609719bSwdenk 2824 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2825 fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2826 fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2827 fca43cc8SJohn Rigby is enabled. 2828 fca43cc8SJohn Rigby 2829 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2830 fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2831 fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2832 fca43cc8SJohn Rigby 2833 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2834 fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2835 fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2836 fca43cc8SJohn Rigby 2837 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2838 c609719bSwdenk Max number of Flash memory banks 2839 c609719bSwdenk 2840 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2841 c609719bSwdenk Max number of sectors on a Flash chip 2842 c609719bSwdenk 2843 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2844 c609719bSwdenk Timeout for Flash erase operations (in ms) 2845 c609719bSwdenk 2846 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2847 c609719bSwdenk Timeout for Flash write operations (in ms) 2848 c609719bSwdenk 2849 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 2850 8564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 2851 8564acf9Swdenk 2852 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 2853 8564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 2854 8564acf9Swdenk 2855 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 2856 8564acf9Swdenk If defined, hardware flash sectors protection is used 2857 8564acf9Swdenk instead of U-Boot software protection. 2858 8564acf9Swdenk 2859 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2860 c609719bSwdenk 2861 c609719bSwdenk Enable TFTP transfers directly to flash memory; 2862 c609719bSwdenk without this option such a download has to be 2863 c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2864 c609719bSwdenk copy from RAM to flash. 2865 c609719bSwdenk 2866 c609719bSwdenk The two-step approach is usually more reliable, since 2867 c609719bSwdenk you can check if the download worked before you erase 2868 11ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 2869 11ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2870 c609719bSwdenk downloaded image) this option may be very useful. 2871 c609719bSwdenk 2872 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2873 c609719bSwdenk Define if the flash driver uses extra elements in the 2874 5653fc33Swdenk common flash structure for storing flash geometry. 2875 5653fc33Swdenk 2876 00b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 2877 5653fc33Swdenk This option also enables the building of the cfi_flash driver 2878 5653fc33Swdenk in the drivers directory 2879 53cf9435Sstroese 2880 91809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 2881 91809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 2882 91809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 2883 91809ed5SPiotr Ziecik to the MTD layer. 2884 91809ed5SPiotr Ziecik 2885 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 2886 96ef831fSGuennadi Liakhovetski Use buffered writes to flash. 2887 96ef831fSGuennadi Liakhovetski 2888 96ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 2889 96ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 2890 96ef831fSGuennadi Liakhovetski write commands. 2891 96ef831fSGuennadi Liakhovetski 2892 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 2893 5568e613SStefan Roese If this option is defined, the common CFI flash doesn't 2894 5568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 2895 5568e613SStefan Roese is useful, if some of the configured banks are only 2896 5568e613SStefan Roese optionally available. 2897 5568e613SStefan Roese 2898 9a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 2899 9a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 2900 9a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 2901 9a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 2902 9a042e9cSJerry Van Baren 2903 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 2904 11ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 2905 11ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 2906 53cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 2907 53cf9435Sstroese buffers can be full shortly after enabling the interface 2908 11ccc33fSMarcel Ziswiler on high Ethernet traffic. 2909 53cf9435Sstroese Defaults to 4 if not defined. 2910 c609719bSwdenk 2911 ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2912 ea882bafSWolfgang Denk 2913 ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2914 ea882bafSWolfgang Denk internally to store the environment settings. The default 2915 ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2916 ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2917 ea882bafSWolfgang Denk lib/hashtable.c for details. 2918 ea882bafSWolfgang Denk 2919 c609719bSwdenkThe following definitions that deal with the placement and management 2920 c609719bSwdenkof environment data (variable area); in general, we support the 2921 c609719bSwdenkfollowing configurations: 2922 c609719bSwdenk 2923 c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2924 c3eb3fe4SMike Frysinger 2925 c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2926 c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2927 c3eb3fe4SMike Frysinger 2928 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2929 c609719bSwdenk 2930 c609719bSwdenk Define this if the environment is in flash memory. 2931 c609719bSwdenk 2932 c609719bSwdenk a) The environment occupies one whole flash sector, which is 2933 c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2934 c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2935 c609719bSwdenk sector" type flash chips, which have several smaller 2936 c609719bSwdenk sectors at the start or the end. For instance, such a 2937 c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2938 c609719bSwdenk such a case you would place the environment in one of the 2939 c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2940 c609719bSwdenk "top boot sector" type flash chips, you would put the 2941 c609719bSwdenk environment in one of the last sectors, leaving a gap 2942 c609719bSwdenk between U-Boot and the environment. 2943 c609719bSwdenk 2944 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2945 c609719bSwdenk 2946 c609719bSwdenk Offset of environment data (variable area) to the 2947 c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2948 c609719bSwdenk type flash chips the second sector can be used: the offset 2949 c609719bSwdenk for this sector is given here. 2950 c609719bSwdenk 2951 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2952 c609719bSwdenk 2953 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2954 c609719bSwdenk 2955 c609719bSwdenk This is just another way to specify the start address of 2956 c609719bSwdenk the flash sector containing the environment (instead of 2957 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2958 c609719bSwdenk 2959 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2960 c609719bSwdenk 2961 c609719bSwdenk Size of the sector containing the environment. 2962 c609719bSwdenk 2963 c609719bSwdenk 2964 c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2965 c609719bSwdenk In such a case you don't want to spend a whole sector for 2966 c609719bSwdenk the environment. 2967 c609719bSwdenk 2968 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2969 c609719bSwdenk 2970 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 2971 0e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2972 c609719bSwdenk of this flash sector for the environment. This saves 2973 c609719bSwdenk memory for the RAM copy of the environment. 2974 c609719bSwdenk 2975 c609719bSwdenk It may also save flash memory if you decide to use this 2976 c609719bSwdenk when your environment is "embedded" within U-Boot code, 2977 c609719bSwdenk since then the remainder of the flash sector could be used 2978 c609719bSwdenk for U-Boot code. It should be pointed out that this is 2979 c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2980 c609719bSwdenk updating the environment in flash makes it always 2981 c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2982 c609719bSwdenk wrong before the contents has been restored from a copy in 2983 c609719bSwdenk RAM, your target system will be dead. 2984 c609719bSwdenk 2985 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 2986 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2987 c609719bSwdenk 2988 c609719bSwdenk These settings describe a second storage area used to hold 2989 11ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 2990 3e38691eSwdenk a valid backup copy in case there is a power failure during 2991 c609719bSwdenk a "saveenv" operation. 2992 c609719bSwdenk 2993 c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2994 c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2995 c609719bSwdenkaccordingly! 2996 c609719bSwdenk 2997 c609719bSwdenk 2998 9314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2999 c609719bSwdenk 3000 c609719bSwdenk Define this if you have some non-volatile memory device 3001 c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 3002 c609719bSwdenk environment. 3003 c609719bSwdenk 3004 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3005 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3006 c609719bSwdenk 3007 11ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 3008 c609719bSwdenk want to use for environment. It is assumed that this memory 3009 c609719bSwdenk can just be read and written to, without any special 3010 c609719bSwdenk provision. 3011 c609719bSwdenk 3012 c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 3013 c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 3014 11ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 3015 c609719bSwdenkU-Boot will hang. 3016 c609719bSwdenk 3017 c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 3018 c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 3019 c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 3020 c609719bSwdenkto save the current settings. 3021 c609719bSwdenk 3022 c609719bSwdenk 3023 bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 3024 c609719bSwdenk 3025 c609719bSwdenk Use this if you have an EEPROM or similar serial access 3026 c609719bSwdenk device and a driver for it. 3027 c609719bSwdenk 3028 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3029 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3030 c609719bSwdenk 3031 c609719bSwdenk These two #defines specify the offset and size of the 3032 c609719bSwdenk environment area within the total memory of your EEPROM. 3033 c609719bSwdenk 3034 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 3035 c609719bSwdenk If defined, specified the chip address of the EEPROM device. 3036 c609719bSwdenk The default address is zero. 3037 c609719bSwdenk 3038 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 3039 c609719bSwdenk If defined, the number of bits used to address bytes in a 3040 c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 3041 c609719bSwdenk would require six bits. 3042 c609719bSwdenk 3043 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 3044 c609719bSwdenk If defined, the number of milliseconds to delay between 3045 c609719bSwdenk page writes. The default is zero milliseconds. 3046 c609719bSwdenk 3047 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 3048 c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 3049 c609719bSwdenk that this is NOT the chip address length! 3050 c609719bSwdenk 3051 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 3052 5cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 3053 5cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 3054 5cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 3055 5cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 3056 5cf91d6bSwdenk byte chips. 3057 5cf91d6bSwdenk 3058 5cf91d6bSwdenk Note that we consider the length of the address field to 3059 5cf91d6bSwdenk still be one byte because the extra address bits are hidden 3060 5cf91d6bSwdenk in the chip address. 3061 5cf91d6bSwdenk 3062 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 3063 c609719bSwdenk The size in bytes of the EEPROM device. 3064 c609719bSwdenk 3065 548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 3066 548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 3067 548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 3068 548738b4SHeiko Schocher 3069 548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 3070 548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 3071 548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 3072 548738b4SHeiko Schocher EEPROM. For example: 3073 548738b4SHeiko Schocher 3074 548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 3075 548738b4SHeiko Schocher 3076 548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 3077 548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 3078 c609719bSwdenk 3079 057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 3080 5779d8d9Swdenk 3081 5779d8d9Swdenk Define this if you have a DataFlash memory device which you 3082 5779d8d9Swdenk want to use for the environment. 3083 5779d8d9Swdenk 3084 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3085 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 3086 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3087 5779d8d9Swdenk 3088 5779d8d9Swdenk These three #defines specify the offset and size of the 3089 5779d8d9Swdenk environment area within the total memory of your DataFlash placed 3090 5779d8d9Swdenk at the specified address. 3091 5779d8d9Swdenk 3092 0a85a9e7SLiu Gang- CONFIG_ENV_IS_IN_REMOTE: 3093 0a85a9e7SLiu Gang 3094 0a85a9e7SLiu Gang Define this if you have a remote memory space which you 3095 0a85a9e7SLiu Gang want to use for the local device's environment. 3096 0a85a9e7SLiu Gang 3097 0a85a9e7SLiu Gang - CONFIG_ENV_ADDR: 3098 0a85a9e7SLiu Gang - CONFIG_ENV_SIZE: 3099 0a85a9e7SLiu Gang 3100 0a85a9e7SLiu Gang These two #defines specify the address and size of the 3101 0a85a9e7SLiu Gang environment area within the remote memory space. The 3102 0a85a9e7SLiu Gang local device can get the environment from remote memory 3103 0a85a9e7SLiu Gang space by SRIO or other links. 3104 0a85a9e7SLiu Gang 3105 0a85a9e7SLiu GangBE CAREFUL! For some special cases, the local device can not use 3106 0a85a9e7SLiu Gang"saveenv" command. For example, the local device will get the 3107 0a85a9e7SLiu Gangenvironment stored in a remote NOR flash by SRIO link, but it can 3108 0a85a9e7SLiu Gangnot erase, write this NOR flash by SRIO interface. 3109 0a85a9e7SLiu Gang 3110 51bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 3111 13a5695bSwdenk 3112 13a5695bSwdenk Define this if you have a NAND device which you want to use 3113 13a5695bSwdenk for the environment. 3114 13a5695bSwdenk 3115 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 3116 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 3117 13a5695bSwdenk 3118 13a5695bSwdenk These two #defines specify the offset and size of the environment 3119 fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 3120 fdd813deSScott Wood aligned to an erase block boundary. 3121 5779d8d9Swdenk 3122 fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 3123 e443c944SMarkus Klotzbuecher 3124 0e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 3125 fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 3126 fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 3127 fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 3128 fdd813deSScott Wood aligned to an erase block boundary. 3129 e443c944SMarkus Klotzbuecher 3130 fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 3131 fdd813deSScott Wood 3132 fdd813deSScott Wood Specifies the length of the region in which the environment 3133 fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 3134 fdd813deSScott Wood block size. Specifying a range with more erase blocks than 3135 fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 3136 fdd813deSScott Wood the range to be avoided. 3137 fdd813deSScott Wood 3138 fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 3139 fdd813deSScott Wood 3140 fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 3141 fdd813deSScott Wood environment from block zero's out-of-band data. The 3142 fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 3143 fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 3144 fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 3145 e443c944SMarkus Klotzbuecher 3146 b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 3147 b74ab737SGuennadi Liakhovetski 3148 b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 3149 b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 3150 b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 3151 b74ab737SGuennadi Liakhovetski 3152 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 3153 c609719bSwdenk 3154 c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 3155 c609719bSwdenk area is used at an early stage (ROM part) if the environment 3156 c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 3157 c609719bSwdenk scratch DPRAM area. It is used between the two initialization 3158 c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 3159 c609719bSwdenk to be a good choice since it makes it far enough from the 3160 c609719bSwdenk start of the data area as well as from the stack pointer. 3161 c609719bSwdenk 3162 e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 3163 c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3164 cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3165 c609719bSwdenkuntil then to read environment variables. 3166 c609719bSwdenk 3167 85ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 3168 85ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 3169 85ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 3170 85ec0bccSwdenknecessary, because the first environment variable we need is the 3171 85ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 3172 85ec0bccSwdenkhave any device yet where we could complain.] 3173 c609719bSwdenk 3174 c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3175 c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 3176 85ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3177 c609719bSwdenk 3178 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3179 fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3180 fc3e2165Swdenk 3181 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3182 fc3e2165Swdenk also needs to be defined. 3183 fc3e2165Swdenk 3184 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3185 fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3186 c609719bSwdenk 3187 f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3188 f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3189 f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3190 f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3191 f5675aa5SRon Madrid space for already greatly restricted images, including but not 3192 f5675aa5SRon Madrid limited to NAND_SPL configurations. 3193 f5675aa5SRon Madrid 3194 c609719bSwdenkLow Level (hardware related) configuration options: 3195 dc7c9a1aSwdenk--------------------------------------------------- 3196 c609719bSwdenk 3197 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3198 c609719bSwdenk Cache Line Size of the CPU. 3199 c609719bSwdenk 3200 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3201 c609719bSwdenk Default address of the IMMR after system reset. 3202 2535d602Swdenk 3203 2535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 3204 2535d602Swdenk and RPXsuper) to be able to adjust the position of 3205 2535d602Swdenk the IMMR register after a reset. 3206 c609719bSwdenk 3207 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3208 e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3209 e46fedfeSTimur Tabi PowerPC SOCs. 3210 e46fedfeSTimur Tabi 3211 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3212 e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3213 e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3214 e46fedfeSTimur Tabi 3215 e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3216 e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3217 e46fedfeSTimur Tabi 3218 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3219 e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3220 e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3221 e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3222 e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3223 e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3224 e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3225 e46fedfeSTimur Tabi 3226 e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3227 e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3228 e46fedfeSTimur Tabi 3229 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3230 e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3231 e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3232 e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3233 e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3234 e46fedfeSTimur Tabi 3235 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3236 e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3237 e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3238 e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3239 e46fedfeSTimur Tabi 3240 e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3241 e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3242 e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3243 e46fedfeSTimur Tabi 3244 7f6c2cbcSwdenk- Floppy Disk Support: 3245 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 3246 7f6c2cbcSwdenk 3247 7f6c2cbcSwdenk the default drive number (default value 0) 3248 7f6c2cbcSwdenk 3249 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 3250 7f6c2cbcSwdenk 3251 11ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 3252 7f6c2cbcSwdenk (default value 1) 3253 7f6c2cbcSwdenk 3254 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 3255 7f6c2cbcSwdenk 3256 7f6c2cbcSwdenk defines the offset of register from address. It 3257 7f6c2cbcSwdenk depends on which part of the data bus is connected to 3258 11ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 3259 7f6c2cbcSwdenk 3260 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 3261 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 3262 7f6c2cbcSwdenk default value. 3263 7f6c2cbcSwdenk 3264 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 3265 7f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 3266 7f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 3267 7f6c2cbcSwdenk source code. It is used to make hardware dependant 3268 7f6c2cbcSwdenk initializations. 3269 7f6c2cbcSwdenk 3270 0abddf82SMacpaul Lin- CONFIG_IDE_AHB: 3271 0abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 3272 0abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 3273 0abddf82SMacpaul Lin When software is doing ATA command and data transfer to 3274 0abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 3275 0abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 3276 0abddf82SMacpaul Lin is requierd. 3277 0abddf82SMacpaul Lin 3278 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 3279 25d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 3280 25d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3281 c609719bSwdenk 3282 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3283 c609719bSwdenk 3284 7152b1d0Swdenk Start address of memory area that can be used for 3285 c609719bSwdenk initial data and stack; please note that this must be 3286 c609719bSwdenk writable memory that is working WITHOUT special 3287 c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3288 c609719bSwdenk will become available only after programming the 3289 c609719bSwdenk memory controller and running certain initialization 3290 c609719bSwdenk sequences. 3291 c609719bSwdenk 3292 c609719bSwdenk U-Boot uses the following memory types: 3293 c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3294 c609719bSwdenk - MPC824X: data cache 3295 c609719bSwdenk - PPC4xx: data cache 3296 c609719bSwdenk 3297 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3298 c609719bSwdenk 3299 c609719bSwdenk Offset of the initial data structure in the memory 3300 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 3301 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3302 c609719bSwdenk data is located at the end of the available space 3303 553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 3304 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 3305 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 3306 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3307 c609719bSwdenk 3308 c609719bSwdenk Note: 3309 c609719bSwdenk On the MPC824X (or other systems that use the data 3310 c609719bSwdenk cache for initial memory) the address chosen for 3311 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3312 c609719bSwdenk point to an otherwise UNUSED address space between 3313 c609719bSwdenk the top of RAM and the start of the PCI space. 3314 c609719bSwdenk 3315 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3316 c609719bSwdenk 3317 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3318 c609719bSwdenk 3319 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3320 c609719bSwdenk 3321 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3322 c609719bSwdenk 3323 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3324 c609719bSwdenk 3325 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3326 c609719bSwdenk 3327 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3328 c609719bSwdenk SDRAM timing 3329 c609719bSwdenk 3330 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3331 c609719bSwdenk periodic timer for refresh 3332 c609719bSwdenk 3333 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3334 c609719bSwdenk 3335 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 3336 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 3337 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 3338 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3339 c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3340 c609719bSwdenk 3341 c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 3342 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 3343 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3344 c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3345 c609719bSwdenk 3346 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 3347 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3348 c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3349 c609719bSwdenk Prescaler definitions (SDRAM timing) 3350 c609719bSwdenk 3351 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3352 c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3353 c609719bSwdenk define relocation offset in DPRAM [DSP2] 3354 c609719bSwdenk 3355 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3356 b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3357 b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3358 b423d055SHeiko Schocher 3359 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3360 c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3361 c609719bSwdenk define relocation offset in DPRAM [SCC4] 3362 c609719bSwdenk 3363 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3364 c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3365 c609719bSwdenk wrong setting might damage your board. Read 3366 c609719bSwdenk doc/README.MBX before setting this variable! 3367 c609719bSwdenk 3368 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3369 ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3370 ea909b76Swdenk (Power On Self Tests). This definition overrides 3371 ea909b76Swdenk #define'd default value in commproc.h resp. 3372 ea909b76Swdenk cpm_8260.h. 3373 ea909b76Swdenk 3374 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 3375 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 3376 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 3377 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 3378 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 3379 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 3380 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 3381 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3382 a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 3383 5d232d0eSwdenk 3384 9cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 3385 9cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 3386 9cacf4fcSDirk Eibach required. 3387 9cacf4fcSDirk Eibach 3388 69fd2d3bSAndrew Sharp- CONFIG_PCI_ENUM_ONLY 3389 69fd2d3bSAndrew Sharp Only scan through and get the devices on the busses. 3390 69fd2d3bSAndrew Sharp Don't do any setup work, presumably because someone or 3391 69fd2d3bSAndrew Sharp something has already done it, and we don't need to do it 3392 69fd2d3bSAndrew Sharp a second time. Useful for platforms that are pre-booted 3393 69fd2d3bSAndrew Sharp by coreboot or similar. 3394 69fd2d3bSAndrew Sharp 3395 a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3396 a09b9b68SKumar Gala Chip has SRIO or not 3397 a09b9b68SKumar Gala 3398 a09b9b68SKumar Gala- CONFIG_SRIO1: 3399 a09b9b68SKumar Gala Board has SRIO 1 port available 3400 a09b9b68SKumar Gala 3401 a09b9b68SKumar Gala- CONFIG_SRIO2: 3402 a09b9b68SKumar Gala Board has SRIO 2 port available 3403 a09b9b68SKumar Gala 3404 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3405 a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3406 a09b9b68SKumar Gala 3407 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3408 a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3409 a09b9b68SKumar Gala 3410 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3411 a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3412 a09b9b68SKumar Gala 3413 eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3414 eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3415 eced4626SAlex Waterman 16 bit bus. 3416 eced4626SAlex Waterman 3417 eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3418 eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3419 eced4626SAlex Waterman a default value will be used. 3420 eced4626SAlex Waterman 3421 bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3422 218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3423 218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3424 218ca724SWolfgang Denk 3425 bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3426 bb99ad6dSBen Warren I2C address of the SPD EEPROM 3427 bb99ad6dSBen Warren 3428 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3429 218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3430 218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3431 218ca724SWolfgang Denk to something your driver can deal with. 3432 bb99ad6dSBen Warren 3433 1b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 3434 1b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 3435 1b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 3436 1b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 3437 1b3e3c4fSYork Sun header files or board specific files. 3438 1b3e3c4fSYork Sun 3439 6f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 3440 6f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 3441 6f5e1dc5SYork Sun 3442 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3443 218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3444 218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 3445 2ad6b513STimur Tabi 3446 c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3447 c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3448 c26e454dSwdenk 3449 c26e454dSwdenk- CONFIG_FEC[12]_PHY 3450 c26e454dSwdenk Define to the hardcoded PHY address which corresponds 3451 6e592385Swdenk to the given FEC; i. e. 3452 c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3453 c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3454 c26e454dSwdenk 3455 c26e454dSwdenk When set to -1, means to probe for first available. 3456 c26e454dSwdenk 3457 c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3458 c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3459 c26e454dSwdenk (so program the FEC to ignore it). 3460 c26e454dSwdenk 3461 c26e454dSwdenk- CONFIG_RMII 3462 c26e454dSwdenk Enable RMII mode for all FECs. 3463 c26e454dSwdenk Note that this is a global option, we can't 3464 c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3465 c26e454dSwdenk 3466 5cf91d6bSwdenk- CONFIG_CRC32_VERIFY 3467 5cf91d6bSwdenk Add a verify option to the crc32 command. 3468 5cf91d6bSwdenk The syntax is: 3469 5cf91d6bSwdenk 3470 5cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 3471 5cf91d6bSwdenk 3472 5cf91d6bSwdenk Where address/count indicate a memory area 3473 5cf91d6bSwdenk and crc32 is the correct crc32 which the 3474 5cf91d6bSwdenk area should have. 3475 5cf91d6bSwdenk 3476 56523f12Swdenk- CONFIG_LOOPW 3477 56523f12Swdenk Add the "loopw" memory command. This only takes effect if 3478 602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 3479 56523f12Swdenk 3480 7b466641Sstroese- CONFIG_MX_CYCLIC 3481 7b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 3482 7b466641Sstroese "md/mw" commands. 3483 7b466641Sstroese Examples: 3484 7b466641Sstroese 3485 7b466641Sstroese => mdc.b 10 4 500 3486 7b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 3487 7b466641Sstroese 3488 7b466641Sstroese => mwc.l 100 12345678 10 3489 7b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 3490 7b466641Sstroese 3491 7b466641Sstroese This only takes effect if the memory commands are activated 3492 602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 3493 7b466641Sstroese 3494 8aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3495 afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3496 e03f3169SWolfgang Denk low level initializations (like setting up the memory 3497 e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3498 e03f3169SWolfgang Denk relocate itself into RAM. 3499 8aa1a2d1Swdenk 3500 e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3501 e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3502 e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3503 e03f3169SWolfgang Denk these initializations itself. 3504 8aa1a2d1Swdenk 3505 401bb30bSAneesh V- CONFIG_SPL_BUILD 3506 df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3507 df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3508 df81238bSMagnus Lilja compiling a NAND SPL. 3509 400558b5Swdenk 3510 d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3511 d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3512 d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3513 d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3514 d8834a13SMatthias Weisser conditions but may increase the binary size. 3515 d8834a13SMatthias Weisser 3516 f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3517 f2717b47STimur Tabi----------------------------------- 3518 f2717b47STimur Tabi 3519 f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3520 f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3521 f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3522 f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3523 f2717b47STimur Tabiwithin that device. 3524 f2717b47STimur Tabi 3525 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3526 f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3527 f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3528 f2717b47STimur Tabi is also specified. 3529 f2717b47STimur Tabi 3530 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3531 f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3532 f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3533 f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3534 f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3535 f2717b47STimur Tabi 3536 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3537 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3538 f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3539 f2717b47STimur Tabi virtual address in NOR flash. 3540 f2717b47STimur Tabi 3541 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3542 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3543 f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3544 f2717b47STimur Tabi 3545 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3546 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3547 f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3548 f2717b47STimur Tabi 3549 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3550 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3551 f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3552 f2717b47STimur Tabi 3553 292dc6c5SLiu Gang- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE 3554 292dc6c5SLiu Gang Specifies that QE/FMAN firmware is located in the remote (master) 3555 292dc6c5SLiu Gang memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which 3556 292dc6c5SLiu Gang can be mapped from slave TLB->slave LAW->slave SRIO outbound window 3557 292dc6c5SLiu Gang ->master inbound window->master LAW->the ucode address in master's 3558 292dc6c5SLiu Gang NOR flash. 3559 f2717b47STimur Tabi 3560 c609719bSwdenkBuilding the Software: 3561 c609719bSwdenk====================== 3562 c609719bSwdenk 3563 218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3564 218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3565 218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3566 218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3567 218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3568 218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3569 c609719bSwdenk 3570 218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3571 218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3572 218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3573 218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3574 218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3575 c609719bSwdenk 3576 218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3577 218ca724SWolfgang Denk $ export CROSS_COMPILE 3578 c609719bSwdenk 3579 2f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 3580 2f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 3581 2f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 3582 2f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 3583 2f8d396bSPeter Tyser 3584 2f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 3585 2f8d396bSPeter Tyser 3586 2f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 3587 2f8d396bSPeter Tyser be executed on computers running Windows. 3588 2f8d396bSPeter Tyser 3589 c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3590 c609719bSwdenksources you must configure U-Boot for one specific board type. This 3591 c609719bSwdenkis done by typing: 3592 c609719bSwdenk 3593 c609719bSwdenk make NAME_config 3594 c609719bSwdenk 3595 218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 3596 4d675ae6SMichael Jonesrations; see boards.cfg for supported names. 3597 54387ac9Swdenk 3598 c609719bSwdenkNote: for some board special configuration names may exist; check if 3599 c609719bSwdenk additional information is available from the board vendor; for 3600 2729af9dSwdenk instance, the TQM823L systems are available without (standard) 3601 2729af9dSwdenk or with LCD support. You can select such additional "features" 3602 11ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3603 c609719bSwdenk 3604 2729af9dSwdenk make TQM823L_config 3605 2729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3606 c609719bSwdenk 3607 c609719bSwdenk make TQM823L_LCD_config 3608 c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3609 c609719bSwdenk 3610 c609719bSwdenk etc. 3611 c609719bSwdenk 3612 c609719bSwdenk 3613 c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 3614 7152b1d0Swdenkimages ready for download to / installation on your system: 3615 c609719bSwdenk 3616 c609719bSwdenk- "u-boot.bin" is a raw binary image 3617 c609719bSwdenk- "u-boot" is an image in ELF binary format 3618 c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3619 c609719bSwdenk 3620 baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3621 baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3622 baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3623 baf31249SMarian Balakowicz 3624 baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3625 baf31249SMarian Balakowicz 3626 baf31249SMarian Balakowicz make O=/tmp/build distclean 3627 baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3628 baf31249SMarian Balakowicz make O=/tmp/build all 3629 baf31249SMarian Balakowicz 3630 baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3631 baf31249SMarian Balakowicz 3632 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3633 baf31249SMarian Balakowicz make distclean 3634 baf31249SMarian Balakowicz make NAME_config 3635 baf31249SMarian Balakowicz make all 3636 baf31249SMarian Balakowicz 3637 baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3638 baf31249SMarian Balakowiczvariable. 3639 baf31249SMarian Balakowicz 3640 c609719bSwdenk 3641 c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3642 c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3643 c609719bSwdenknative "make". 3644 c609719bSwdenk 3645 c609719bSwdenk 3646 c609719bSwdenkIf the system board that you have is not listed, then you will need 3647 c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3648 c609719bSwdenksteps: 3649 c609719bSwdenk 3650 c609719bSwdenk1. Add a new configuration option for your board to the toplevel 3651 4d675ae6SMichael Jones "boards.cfg" file, using the existing entries as examples. 3652 4d675ae6SMichael Jones Follow the instructions there to keep the boards in order. 3653 c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 3654 85ec0bccSwdenk files you need. In your board directory, you will need at least 3655 85ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 3656 85ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 3657 85ec0bccSwdenk your board 3658 c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3659 c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 3660 85ec0bccSwdenk4. Run "make <board>_config" with your new name. 3661 c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3662 c609719bSwdenk to be installed on your target system. 3663 85ec0bccSwdenk6. Debug and solve any problems that might arise. 3664 c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3665 c609719bSwdenk 3666 c609719bSwdenk 3667 c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3668 c609719bSwdenk============================================================== 3669 c609719bSwdenk 3670 c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3671 c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3672 c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3673 c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3674 218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3675 c609719bSwdenk 3676 c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3677 c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3678 c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3679 c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3680 c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 3681 7152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3682 218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3683 218ca724SWolfgang Denkyou can type 3684 c609719bSwdenk 3685 c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3686 c609719bSwdenk 3687 c609719bSwdenkor to build on a native PowerPC system you can type 3688 c609719bSwdenk 3689 c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3690 c609719bSwdenk 3691 218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3692 218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3693 218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3694 218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3695 218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3696 218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3697 218ca724SWolfgang Denkvariable. For example: 3698 baf31249SMarian Balakowicz 3699 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3700 baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3701 baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3702 baf31249SMarian Balakowicz 3703 218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3704 218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3705 218ca724SWolfgang Denkduring the whole build process. 3706 baf31249SMarian Balakowicz 3707 baf31249SMarian Balakowicz 3708 c609719bSwdenkSee also "U-Boot Porting Guide" below. 3709 c609719bSwdenk 3710 c609719bSwdenk 3711 c609719bSwdenkMonitor Commands - Overview: 3712 c609719bSwdenk============================ 3713 c609719bSwdenk 3714 c609719bSwdenkgo - start application at address 'addr' 3715 c609719bSwdenkrun - run commands in an environment variable 3716 c609719bSwdenkbootm - boot application image from memory 3717 c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3718 44f074c7SMarek Vasutbootz - boot zImage from memory 3719 c609719bSwdenktftpboot- boot image via network using TFTP protocol 3720 c609719bSwdenk and env variables "ipaddr" and "serverip" 3721 c609719bSwdenk (and eventually "gatewayip") 3722 1fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3723 c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3724 c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3725 c609719bSwdenkloads - load S-Record file over serial line 3726 c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3727 c609719bSwdenkmd - memory display 3728 c609719bSwdenkmm - memory modify (auto-incrementing) 3729 c609719bSwdenknm - memory modify (constant address) 3730 c609719bSwdenkmw - memory write (fill) 3731 c609719bSwdenkcp - memory copy 3732 c609719bSwdenkcmp - memory compare 3733 c609719bSwdenkcrc32 - checksum calculation 3734 0f89c54bSPeter Tyseri2c - I2C sub-system 3735 c609719bSwdenksspi - SPI utility commands 3736 c609719bSwdenkbase - print or set address offset 3737 c609719bSwdenkprintenv- print environment variables 3738 c609719bSwdenksetenv - set environment variables 3739 c609719bSwdenksaveenv - save environment variables to persistent storage 3740 c609719bSwdenkprotect - enable or disable FLASH write protection 3741 c609719bSwdenkerase - erase FLASH memory 3742 c609719bSwdenkflinfo - print FLASH memory information 3743 c609719bSwdenkbdinfo - print Board Info structure 3744 c609719bSwdenkiminfo - print header information for application image 3745 c609719bSwdenkconinfo - print console devices and informations 3746 c609719bSwdenkide - IDE sub-system 3747 c609719bSwdenkloop - infinite loop on address range 3748 56523f12Swdenkloopw - infinite write loop on address range 3749 c609719bSwdenkmtest - simple RAM test 3750 c609719bSwdenkicache - enable or disable instruction cache 3751 c609719bSwdenkdcache - enable or disable data cache 3752 c609719bSwdenkreset - Perform RESET of the CPU 3753 c609719bSwdenkecho - echo args to console 3754 c609719bSwdenkversion - print monitor version 3755 c609719bSwdenkhelp - print online help 3756 c609719bSwdenk? - alias for 'help' 3757 c609719bSwdenk 3758 c609719bSwdenk 3759 c609719bSwdenkMonitor Commands - Detailed Description: 3760 c609719bSwdenk======================================== 3761 c609719bSwdenk 3762 c609719bSwdenkTODO. 3763 c609719bSwdenk 3764 c609719bSwdenkFor now: just type "help <command>". 3765 c609719bSwdenk 3766 c609719bSwdenk 3767 c609719bSwdenkEnvironment Variables: 3768 c609719bSwdenk====================== 3769 c609719bSwdenk 3770 c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3771 c609719bSwdenkcan be made persistent by saving to Flash memory. 3772 c609719bSwdenk 3773 c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3774 c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3775 c609719bSwdenkwithout a value can be used to delete a variable from the 3776 c609719bSwdenkenvironment. As long as you don't save the environment you are 3777 c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3778 c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3779 c609719bSwdenk 3780 c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3781 c96f86eeSWolfgang Denk 3782 c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3783 c609719bSwdenk 3784 c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3785 c609719bSwdenk 3786 c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3787 c609719bSwdenk 3788 c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3789 c609719bSwdenk 3790 c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3791 c609719bSwdenk 3792 c609719bSwdenk bootfile - Name of the image to load with TFTP 3793 c609719bSwdenk 3794 7d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 3795 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3796 7d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 3797 7d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 3798 7d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 3799 7d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3800 c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3801 c3624e6eSGrant Likely bootm_mapsize. 3802 c3624e6eSGrant Likely 3803 c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3804 c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3805 c3624e6eSGrant Likely defines the size of the memory region starting at base 3806 c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3807 c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3808 c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3809 c3624e6eSGrant Likely used otherwise. 3810 7d721e34SBartlomiej Sieka 3811 7d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 3812 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3813 7d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 3814 7d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 3815 7d721e34SBartlomiej Sieka environment variable. 3816 7d721e34SBartlomiej Sieka 3817 4bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 3818 4bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 3819 4bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 3820 4bae9090SBartlomiej Sieka 3821 c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3822 c609719bSwdenk "bootp" will just load perform a lookup of the 3823 c609719bSwdenk configuration from the BOOTP server, but not try to 3824 c609719bSwdenk load any image using TFTP 3825 c609719bSwdenk 3826 c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3827 c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3828 c609719bSwdenk be automatically started (by internally calling 3829 c609719bSwdenk "bootm") 3830 c609719bSwdenk 3831 4a6fd34bSwdenk If set to "no", a standalone image passed to the 3832 4a6fd34bSwdenk "bootm" command will be copied to the load address 3833 4a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 3834 4a6fd34bSwdenk This can be used to load and uncompress arbitrary 3835 4a6fd34bSwdenk data. 3836 4a6fd34bSwdenk 3837 a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3838 a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3839 fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3840 fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3841 fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3842 fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3843 fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3844 fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3845 fa34f6b2SShawn Guo access it during the boot procedure. 3846 fa34f6b2SShawn Guo 3847 a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3848 a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3849 a28afca5SDavid A. Long to work it must reside in writable memory, have 3850 a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3851 a28afca5SDavid A. Long add the information it needs into it, and the memory 3852 a28afca5SDavid A. Long must be accessible by the kernel. 3853 a28afca5SDavid A. Long 3854 eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3855 eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3856 eea63e05SSimon Glass defined. 3857 eea63e05SSimon Glass 3858 17ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 3859 17ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 3860 17ea1177Swdenk mode (400kHZ). This environment variable is used in 3861 17ea1177Swdenk initialization code. So, for changes to be effective 3862 17ea1177Swdenk it must be saved and board must be reset. 3863 17ea1177Swdenk 3864 c609719bSwdenk initrd_high - restrict positioning of initrd images: 3865 c609719bSwdenk If this variable is not set, initrd images will be 3866 c609719bSwdenk copied to the highest possible address in RAM; this 3867 c609719bSwdenk is usually what you want since it allows for 3868 c609719bSwdenk maximum initrd size. If for some reason you want to 3869 c609719bSwdenk make sure that the initrd image is loaded below the 3870 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3871 c609719bSwdenk variable to a value of "no" or "off" or "0". 3872 c609719bSwdenk Alternatively, you can set it to a maximum upper 3873 c609719bSwdenk address to use (U-Boot will still check that it 3874 c609719bSwdenk does not overwrite the U-Boot stack and data). 3875 c609719bSwdenk 3876 c609719bSwdenk For instance, when you have a system with 16 MB 3877 7152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3878 c609719bSwdenk you can do this by adding "mem=12M" to the value of 3879 c609719bSwdenk the "bootargs" variable. However, now you must make 3880 7152b1d0Swdenk sure that the initrd image is placed in the first 3881 c609719bSwdenk 12 MB as well - this can be done with 3882 c609719bSwdenk 3883 c609719bSwdenk setenv initrd_high 00c00000 3884 c609719bSwdenk 3885 38b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 3886 38b99261Swdenk indication to U-Boot that all addresses are legal 3887 38b99261Swdenk for the Linux kernel, including addresses in flash 3888 38b99261Swdenk memory. In this case U-Boot will NOT COPY the 3889 38b99261Swdenk ramdisk at all. This may be useful to reduce the 3890 38b99261Swdenk boot time on your system, but requires that this 3891 38b99261Swdenk feature is supported by your Linux kernel. 3892 38b99261Swdenk 3893 c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3894 c609719bSwdenk 3895 c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3896 dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3897 c609719bSwdenk 3898 c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3899 c609719bSwdenk 3900 c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3901 c609719bSwdenk 3902 c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3903 c609719bSwdenk 3904 c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3905 c609719bSwdenk 3906 c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3907 c609719bSwdenk 3908 e2a53458SMike Frysinger ethprime - controls which interface is used first. 3909 a3d991bdSwdenk 3910 e2a53458SMike Frysinger ethact - controls which interface is currently active. 3911 e2a53458SMike Frysinger For example you can do the following 3912 a3d991bdSwdenk 3913 48690d80SHeiko Schocher => setenv ethact FEC 3914 48690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 3915 48690d80SHeiko Schocher => setenv ethact SCC 3916 48690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3917 a3d991bdSwdenk 3918 e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3919 e1692577SMatthias Fuchs available network interfaces. 3920 e1692577SMatthias Fuchs It just stays at the currently selected interface. 3921 e1692577SMatthias Fuchs 3922 a3d991bdSwdenk netretry - When set to "no" each network operation will 3923 a3d991bdSwdenk either succeed or fail without retrying. 3924 6e592385Swdenk When set to "once" the network operation will 3925 6e592385Swdenk fail when all the available network interfaces 3926 6e592385Swdenk are tried once without success. 3927 a3d991bdSwdenk Useful on scripts which control the retry operation 3928 a3d991bdSwdenk themselves. 3929 a3d991bdSwdenk 3930 b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3931 a1cf027aSJean-Christophe PLAGNIOL-VILLARD 3932 28cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3933 ecb0ccd9SWolfgang Denk UDP source port. 3934 ecb0ccd9SWolfgang Denk 3935 28cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 3936 28cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 3937 28cb9375SWolfgang Denk 3938 c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3939 c96f86eeSWolfgang Denk we use the TFTP server's default block size 3940 c96f86eeSWolfgang Denk 3941 c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3942 c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3943 c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3944 c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3945 c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3946 c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3947 c96f86eeSWolfgang Denk with unreliable TFTP servers. 3948 c96f86eeSWolfgang Denk 3949 a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 3950 11ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3951 a3d991bdSwdenk VLAN tagged frames. 3952 c609719bSwdenk 3953 dc0b7b0eSJason HobbsThe following image location variables contain the location of images 3954 dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 3955 dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 3956 dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 3957 dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 3958 dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 3959 dc0b7b0eSJason Hobbsflash or offset in NAND flash. 3960 dc0b7b0eSJason Hobbs 3961 dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 3962 dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 3963 dc0b7b0eSJason Hobbsboards use these variables for other purposes. 3964 dc0b7b0eSJason Hobbs 3965 dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 3966 dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 3967 dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 3968 dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 3969 dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 3970 dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 3971 dc0b7b0eSJason Hobbs 3972 c609719bSwdenkThe following environment variables may be used and automatically 3973 c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3974 c609719bSwdenkdepending the information provided by your boot server: 3975 c609719bSwdenk 3976 c609719bSwdenk bootfile - see above 3977 c609719bSwdenk dnsip - IP address of your Domain Name Server 3978 fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3979 c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3980 c609719bSwdenk hostname - Target hostname 3981 c609719bSwdenk ipaddr - see above 3982 c609719bSwdenk netmask - Subnet Mask 3983 c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3984 c609719bSwdenk serverip - see above 3985 c609719bSwdenk 3986 c609719bSwdenk 3987 c609719bSwdenkThere are two special Environment Variables: 3988 c609719bSwdenk 3989 c609719bSwdenk serial# - contains hardware identification information such 3990 c609719bSwdenk as type string and/or serial number 3991 c609719bSwdenk ethaddr - Ethernet address 3992 c609719bSwdenk 3993 c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3994 c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3995 c609719bSwdenkonce they have been set once. 3996 c609719bSwdenk 3997 c609719bSwdenk 3998 c1551ea8SstroeseFurther special Environment Variables: 3999 c1551ea8Sstroese 4000 c1551ea8Sstroese ver - Contains the U-Boot version string as printed 4001 c1551ea8Sstroese with the "version" command. This variable is 4002 c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 4003 c1551ea8Sstroese 4004 c1551ea8Sstroese 4005 c609719bSwdenkPlease note that changes to some configuration parameters may take 4006 c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 4007 c609719bSwdenk 4008 c609719bSwdenk 4009 f07771ccSwdenkCommand Line Parsing: 4010 f07771ccSwdenk===================== 4011 f07771ccSwdenk 4012 f07771ccSwdenkThere are two different command line parsers available with U-Boot: 4013 7152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 4014 f07771ccSwdenk 4015 f07771ccSwdenkOld, simple command line parser: 4016 f07771ccSwdenk-------------------------------- 4017 f07771ccSwdenk 4018 f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 4019 f07771ccSwdenk- several commands on one line, separated by ';' 4020 fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 4021 f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 4022 f07771ccSwdenk for example: 4023 fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 4024 f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 4025 f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 4026 f07771ccSwdenk 4027 f07771ccSwdenkHush shell: 4028 f07771ccSwdenk----------- 4029 f07771ccSwdenk 4030 f07771ccSwdenk- similar to Bourne shell, with control structures like 4031 f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 4032 f07771ccSwdenk until...do...done, ... 4033 f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 4034 f07771ccSwdenk commands) and local shell variables (through standard shell syntax 4035 f07771ccSwdenk "name=value"); only environment variables can be used with "run" 4036 f07771ccSwdenk command 4037 f07771ccSwdenk 4038 f07771ccSwdenkGeneral rules: 4039 f07771ccSwdenk-------------- 4040 f07771ccSwdenk 4041 f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 4042 f07771ccSwdenk command) contains several commands separated by semicolon, and 4043 f07771ccSwdenk one of these commands fails, then the remaining commands will be 4044 f07771ccSwdenk executed anyway. 4045 f07771ccSwdenk 4046 f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 4047 11ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 4048 f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 4049 f07771ccSwdenk variables are not executed. 4050 f07771ccSwdenk 4051 c609719bSwdenkNote for Redundant Ethernet Interfaces: 4052 c609719bSwdenk======================================= 4053 c609719bSwdenk 4054 11ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 4055 c609719bSwdenksuch configurations and is capable of automatic selection of a 4056 7152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 4057 c609719bSwdenk 4058 c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 4059 c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 4060 c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 4061 c609719bSwdenk 4062 c609719bSwdenkIf the network interface stores some valid MAC address (for instance 4063 c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 4064 c609719bSwdenkding setting in the environment; if the corresponding environment 4065 c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 4066 c609719bSwdenk 4067 c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 4068 c609719bSwdenk environment, the SROM's address is used. 4069 c609719bSwdenk 4070 c609719bSwdenko If there is no valid address in the SROM, and a definition in the 4071 c609719bSwdenk environment exists, then the value from the environment variable is 4072 c609719bSwdenk used. 4073 c609719bSwdenk 4074 c609719bSwdenko If both the SROM and the environment contain a MAC address, and 4075 c609719bSwdenk both addresses are the same, this MAC address is used. 4076 c609719bSwdenk 4077 c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 4078 c609719bSwdenk addresses differ, the value from the environment is used and a 4079 c609719bSwdenk warning is printed. 4080 c609719bSwdenk 4081 c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 4082 c609719bSwdenk is raised. 4083 c609719bSwdenk 4084 ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 4085 ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 4086 ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 4087 ecee9324SBen WarrenThe naming convention is as follows: 4088 ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 4089 c609719bSwdenk 4090 c609719bSwdenkImage Formats: 4091 c609719bSwdenk============== 4092 c609719bSwdenk 4093 3310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 4094 3310c549SMarian Balakowiczimages in two formats: 4095 3310c549SMarian Balakowicz 4096 3310c549SMarian BalakowiczNew uImage format (FIT) 4097 3310c549SMarian Balakowicz----------------------- 4098 3310c549SMarian Balakowicz 4099 3310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 4100 3310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 4101 3310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 4102 3310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 4103 3310c549SMarian Balakowicz 4104 3310c549SMarian Balakowicz 4105 3310c549SMarian BalakowiczOld uImage format 4106 3310c549SMarian Balakowicz----------------- 4107 3310c549SMarian Balakowicz 4108 3310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 4109 3310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 4110 3310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 4111 c609719bSwdenk 4112 c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 4113 c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 4114 f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 4115 f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 4116 f5ed9e39SPeter Tyser INTEGRITY). 4117 7b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 4118 afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 4119 afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 4120 c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 4121 c609719bSwdenk* Load Address 4122 c609719bSwdenk* Entry Point 4123 c609719bSwdenk* Image Name 4124 c609719bSwdenk* Image Timestamp 4125 c609719bSwdenk 4126 c609719bSwdenkThe header is marked by a special Magic Number, and both the header 4127 c609719bSwdenkand the data portions of the image are secured against corruption by 4128 c609719bSwdenkCRC32 checksums. 4129 c609719bSwdenk 4130 c609719bSwdenk 4131 c609719bSwdenkLinux Support: 4132 c609719bSwdenk============== 4133 c609719bSwdenk 4134 c609719bSwdenkAlthough U-Boot should support any OS or standalone application 4135 7152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 4136 c609719bSwdenkU-Boot. 4137 c609719bSwdenk 4138 c609719bSwdenkU-Boot includes many features that so far have been part of some 4139 c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 4140 c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 4141 c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 4142 7152b1d0Swdenkserves several purposes: 4143 c609719bSwdenk 4144 c609719bSwdenk- the same features can be used for other OS or standalone 4145 c609719bSwdenk applications (for instance: using compressed images to reduce the 4146 c609719bSwdenk Flash memory footprint) 4147 c609719bSwdenk 4148 c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 4149 7152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 4150 c609719bSwdenk 4151 c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 4152 c609719bSwdenk images; of course this also means that different kernel images can 4153 c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 4154 c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 4155 c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 4156 c609719bSwdenk software is easier now. 4157 c609719bSwdenk 4158 c609719bSwdenk 4159 c609719bSwdenkLinux HOWTO: 4160 c609719bSwdenk============ 4161 c609719bSwdenk 4162 c609719bSwdenkPorting Linux to U-Boot based systems: 4163 c609719bSwdenk--------------------------------------- 4164 c609719bSwdenk 4165 c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 4166 c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 4167 c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 4168 c609719bSwdenkLinux :-). 4169 c609719bSwdenk 4170 a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4171 c609719bSwdenk 4172 c609719bSwdenkJust make sure your machine specific header file (for instance 4173 c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 4174 1dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 4175 1dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 4176 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4177 c609719bSwdenk 4178 c609719bSwdenk 4179 c609719bSwdenkConfiguring the Linux kernel: 4180 c609719bSwdenk----------------------------- 4181 c609719bSwdenk 4182 c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4183 c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4184 c609719bSwdenk 4185 c609719bSwdenk 4186 c609719bSwdenkBuilding a Linux Image: 4187 c609719bSwdenk----------------------- 4188 c609719bSwdenk 4189 24ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 4190 24ee89b9Swdenknot used. If you use recent kernel source, a new build target 4191 24ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 4192 24ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 4193 24ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 4194 24ee89b9Swdenk100% compatible format. 4195 c609719bSwdenk 4196 c609719bSwdenkExample: 4197 c609719bSwdenk 4198 c609719bSwdenk make TQM850L_config 4199 c609719bSwdenk make oldconfig 4200 c609719bSwdenk make dep 4201 24ee89b9Swdenk make uImage 4202 c609719bSwdenk 4203 24ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 4204 24ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 4205 24ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4206 c609719bSwdenk 4207 24ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 4208 24ee89b9Swdenk 4209 24ee89b9Swdenk* convert the kernel into a raw binary image: 4210 24ee89b9Swdenk 4211 24ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 4212 24ee89b9Swdenk -R .note -R .comment \ 4213 24ee89b9Swdenk -S vmlinux linux.bin 4214 24ee89b9Swdenk 4215 24ee89b9Swdenk* compress the binary image: 4216 24ee89b9Swdenk 4217 24ee89b9Swdenk gzip -9 linux.bin 4218 24ee89b9Swdenk 4219 24ee89b9Swdenk* package compressed binary image for U-Boot: 4220 24ee89b9Swdenk 4221 24ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 4222 24ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 4223 24ee89b9Swdenk -d linux.bin.gz uImage 4224 24ee89b9Swdenk 4225 24ee89b9Swdenk 4226 24ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 4227 24ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 4228 24ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 4229 24ee89b9Swdenkbyte header containing information about target architecture, 4230 24ee89b9Swdenkoperating system, image type, compression method, entry points, time 4231 24ee89b9Swdenkstamp, CRC32 checksums, etc. 4232 24ee89b9Swdenk 4233 24ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 4234 24ee89b9Swdenkprint the header information, or to build new images. 4235 c609719bSwdenk 4236 c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4237 c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4238 c609719bSwdenkchecksum verification: 4239 c609719bSwdenk 4240 c609719bSwdenk tools/mkimage -l image 4241 c609719bSwdenk -l ==> list image header information 4242 c609719bSwdenk 4243 c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4244 c609719bSwdenkfrom a "data file" which is used as image payload: 4245 c609719bSwdenk 4246 c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4247 c609719bSwdenk -n name -d data_file image 4248 c609719bSwdenk -A ==> set architecture to 'arch' 4249 c609719bSwdenk -O ==> set operating system to 'os' 4250 c609719bSwdenk -T ==> set image type to 'type' 4251 c609719bSwdenk -C ==> set compression type 'comp' 4252 c609719bSwdenk -a ==> set load address to 'addr' (hex) 4253 c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4254 c609719bSwdenk -n ==> set image name to 'name' 4255 c609719bSwdenk -d ==> use image data from 'datafile' 4256 c609719bSwdenk 4257 69459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 4258 69459791Swdenkaddress (0x00000000), but the entry point address depends on the 4259 69459791Swdenkkernel version: 4260 c609719bSwdenk 4261 c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 4262 24ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4263 c609719bSwdenk 4264 c609719bSwdenkSo a typical call to build a U-Boot image would read: 4265 c609719bSwdenk 4266 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 4267 24ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4268 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 4269 24ee89b9Swdenk > examples/uImage.TQM850L 4270 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4271 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4272 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4273 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4274 c609719bSwdenk Load Address: 0x00000000 4275 24ee89b9Swdenk Entry Point: 0x00000000 4276 c609719bSwdenk 4277 c609719bSwdenkTo verify the contents of the image (or check for corruption): 4278 c609719bSwdenk 4279 24ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 4280 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4281 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4282 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4283 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4284 c609719bSwdenk Load Address: 0x00000000 4285 24ee89b9Swdenk Entry Point: 0x00000000 4286 c609719bSwdenk 4287 c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4288 c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4289 c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4290 c609719bSwdenkneed to be uncompressed: 4291 c609719bSwdenk 4292 a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 4293 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 4294 24ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4295 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 4296 24ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 4297 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4298 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4299 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4300 c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4301 c609719bSwdenk Load Address: 0x00000000 4302 24ee89b9Swdenk Entry Point: 0x00000000 4303 c609719bSwdenk 4304 c609719bSwdenk 4305 c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4306 c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4307 c609719bSwdenk 4308 c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4309 c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4310 c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4311 c609719bSwdenk Image Name: Simple Ramdisk Image 4312 c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4313 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4314 c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4315 c609719bSwdenk Load Address: 0x00000000 4316 c609719bSwdenk Entry Point: 0x00000000 4317 c609719bSwdenk 4318 c609719bSwdenk 4319 c609719bSwdenkInstalling a Linux Image: 4320 c609719bSwdenk------------------------- 4321 c609719bSwdenk 4322 c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4323 c609719bSwdenkyou must convert the image to S-Record format: 4324 c609719bSwdenk 4325 c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4326 c609719bSwdenk 4327 c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4328 c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4329 c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4330 c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4331 c609719bSwdenkcommand. 4332 c609719bSwdenk 4333 c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4334 c609719bSwdenkTQM8xxL is in the first Flash bank): 4335 c609719bSwdenk 4336 c609719bSwdenk => erase 40100000 401FFFFF 4337 c609719bSwdenk 4338 c609719bSwdenk .......... done 4339 c609719bSwdenk Erased 8 sectors 4340 c609719bSwdenk 4341 c609719bSwdenk => loads 40100000 4342 c609719bSwdenk ## Ready for S-Record download ... 4343 c609719bSwdenk ~>examples/image.srec 4344 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4345 c609719bSwdenk ... 4346 c609719bSwdenk 15989 15990 15991 15992 4347 c609719bSwdenk [file transfer complete] 4348 c609719bSwdenk [connected] 4349 c609719bSwdenk ## Start Addr = 0x00000000 4350 c609719bSwdenk 4351 c609719bSwdenk 4352 c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4353 c609719bSwdenkthis includes a checksum verification so you can be sure no data 4354 c609719bSwdenkcorruption happened: 4355 c609719bSwdenk 4356 c609719bSwdenk => imi 40100000 4357 c609719bSwdenk 4358 c609719bSwdenk ## Checking Image at 40100000 ... 4359 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4360 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4361 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4362 c609719bSwdenk Load Address: 00000000 4363 c609719bSwdenk Entry Point: 0000000c 4364 c609719bSwdenk Verifying Checksum ... OK 4365 c609719bSwdenk 4366 c609719bSwdenk 4367 c609719bSwdenkBoot Linux: 4368 c609719bSwdenk----------- 4369 c609719bSwdenk 4370 c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4371 c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4372 c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4373 c609719bSwdenkparameters. You can check and modify this variable using the 4374 c609719bSwdenk"printenv" and "setenv" commands: 4375 c609719bSwdenk 4376 c609719bSwdenk 4377 c609719bSwdenk => printenv bootargs 4378 c609719bSwdenk bootargs=root=/dev/ram 4379 c609719bSwdenk 4380 c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4381 c609719bSwdenk 4382 c609719bSwdenk => printenv bootargs 4383 c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4384 c609719bSwdenk 4385 c609719bSwdenk => bootm 40020000 4386 c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4387 c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4388 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4389 c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4390 c609719bSwdenk Load Address: 00000000 4391 c609719bSwdenk Entry Point: 0000000c 4392 c609719bSwdenk Verifying Checksum ... OK 4393 c609719bSwdenk Uncompressing Kernel Image ... OK 4394 c609719bSwdenk 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 4395 c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4396 c609719bSwdenk time_init: decrementer frequency = 187500000/60 4397 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4398 c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4399 c609719bSwdenk ... 4400 c609719bSwdenk 4401 11ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 4402 7152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4403 c609719bSwdenkformat!) to the "bootm" command: 4404 c609719bSwdenk 4405 c609719bSwdenk => imi 40100000 40200000 4406 c609719bSwdenk 4407 c609719bSwdenk ## Checking Image at 40100000 ... 4408 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4409 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4410 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4411 c609719bSwdenk Load Address: 00000000 4412 c609719bSwdenk Entry Point: 0000000c 4413 c609719bSwdenk Verifying Checksum ... OK 4414 c609719bSwdenk 4415 c609719bSwdenk ## Checking Image at 40200000 ... 4416 c609719bSwdenk Image Name: Simple Ramdisk Image 4417 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4418 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4419 c609719bSwdenk Load Address: 00000000 4420 c609719bSwdenk Entry Point: 00000000 4421 c609719bSwdenk Verifying Checksum ... OK 4422 c609719bSwdenk 4423 c609719bSwdenk => bootm 40100000 40200000 4424 c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4425 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4426 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4427 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4428 c609719bSwdenk Load Address: 00000000 4429 c609719bSwdenk Entry Point: 0000000c 4430 c609719bSwdenk Verifying Checksum ... OK 4431 c609719bSwdenk Uncompressing Kernel Image ... OK 4432 c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4433 c609719bSwdenk Image Name: Simple Ramdisk Image 4434 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4435 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4436 c609719bSwdenk Load Address: 00000000 4437 c609719bSwdenk Entry Point: 00000000 4438 c609719bSwdenk Verifying Checksum ... OK 4439 c609719bSwdenk Loading Ramdisk ... OK 4440 c609719bSwdenk 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 4441 c609719bSwdenk Boot arguments: root=/dev/ram 4442 c609719bSwdenk time_init: decrementer frequency = 187500000/60 4443 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4444 c609719bSwdenk ... 4445 c609719bSwdenk RAMDISK: Compressed image found at block 0 4446 c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4447 c609719bSwdenk 4448 c609719bSwdenk bash# 4449 c609719bSwdenk 4450 0267768eSMatthew McClintockBoot Linux and pass a flat device tree: 4451 0267768eSMatthew McClintock----------- 4452 0267768eSMatthew McClintock 4453 0267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 4454 0267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 4455 0267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 4456 0267768eSMatthew McClintockflat device tree: 4457 0267768eSMatthew McClintock 4458 0267768eSMatthew McClintock=> print oftaddr 4459 0267768eSMatthew McClintockoftaddr=0x300000 4460 0267768eSMatthew McClintock=> print oft 4461 0267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 4462 0267768eSMatthew McClintock=> tftp $oftaddr $oft 4463 0267768eSMatthew McClintockSpeed: 1000, full duplex 4464 0267768eSMatthew McClintockUsing TSEC0 device 4465 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 4466 0267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 4467 0267768eSMatthew McClintockLoad address: 0x300000 4468 0267768eSMatthew McClintockLoading: # 4469 0267768eSMatthew McClintockdone 4470 0267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 4471 0267768eSMatthew McClintock=> tftp $loadaddr $bootfile 4472 0267768eSMatthew McClintockSpeed: 1000, full duplex 4473 0267768eSMatthew McClintockUsing TSEC0 device 4474 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 4475 0267768eSMatthew McClintockFilename 'uImage'. 4476 0267768eSMatthew McClintockLoad address: 0x200000 4477 0267768eSMatthew McClintockLoading:############ 4478 0267768eSMatthew McClintockdone 4479 0267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 4480 0267768eSMatthew McClintock=> print loadaddr 4481 0267768eSMatthew McClintockloadaddr=200000 4482 0267768eSMatthew McClintock=> print oftaddr 4483 0267768eSMatthew McClintockoftaddr=0x300000 4484 0267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 4485 0267768eSMatthew McClintock## Booting image at 00200000 ... 4486 0267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 4487 0267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 4488 0267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 4489 0267768eSMatthew McClintock Load Address: 00000000 4490 0267768eSMatthew McClintock Entry Point: 00000000 4491 0267768eSMatthew McClintock Verifying Checksum ... OK 4492 0267768eSMatthew McClintock Uncompressing Kernel Image ... OK 4493 0267768eSMatthew McClintockBooting using flat device tree at 0x300000 4494 0267768eSMatthew McClintockUsing MPC85xx ADS machine description 4495 0267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 4496 0267768eSMatthew McClintock[snip] 4497 0267768eSMatthew McClintock 4498 0267768eSMatthew McClintock 4499 6069ff26SwdenkMore About U-Boot Image Types: 4500 6069ff26Swdenk------------------------------ 4501 6069ff26Swdenk 4502 6069ff26SwdenkU-Boot supports the following image types: 4503 6069ff26Swdenk 4504 6069ff26Swdenk "Standalone Programs" are directly runnable in the environment 4505 6069ff26Swdenk provided by U-Boot; it is expected that (if they behave 4506 6069ff26Swdenk well) you can continue to work in U-Boot after return from 4507 6069ff26Swdenk the Standalone Program. 4508 6069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 4509 6069ff26Swdenk will take over control completely. Usually these programs 4510 6069ff26Swdenk will install their own set of exception handlers, device 4511 6069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 4512 6069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 4513 6069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 4514 6069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 4515 6069ff26Swdenk being started. 4516 6069ff26Swdenk "Multi-File Images" contain several images, typically an OS 4517 6069ff26Swdenk (Linux) kernel image and one or more data images like 4518 6069ff26Swdenk RAMDisks. This construct is useful for instance when you want 4519 6069ff26Swdenk to boot over the network using BOOTP etc., where the boot 4520 6069ff26Swdenk server provides just a single image file, but you want to get 4521 6069ff26Swdenk for instance an OS kernel and a RAMDisk image. 4522 6069ff26Swdenk 4523 6069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 4524 6069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 4525 6069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 4526 6069ff26Swdenk Immediately after the terminating 0 follow the images, one by 4527 6069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 4528 6069ff26Swdenk a multiple of 4 bytes). 4529 6069ff26Swdenk 4530 6069ff26Swdenk "Firmware Images" are binary images containing firmware (like 4531 6069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 4532 6069ff26Swdenk flash memory. 4533 6069ff26Swdenk 4534 6069ff26Swdenk "Script files" are command sequences that will be executed by 4535 6069ff26Swdenk U-Boot's command interpreter; this feature is especially 4536 6069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 4537 6069ff26Swdenk as command interpreter. 4538 6069ff26Swdenk 4539 44f074c7SMarek VasutBooting the Linux zImage: 4540 44f074c7SMarek Vasut------------------------- 4541 44f074c7SMarek Vasut 4542 44f074c7SMarek VasutOn some platforms, it's possible to boot Linux zImage. This is done 4543 44f074c7SMarek Vasutusing the "bootz" command. The syntax of "bootz" command is the same 4544 44f074c7SMarek Vasutas the syntax of "bootm" command. 4545 44f074c7SMarek Vasut 4546 017e1f3fSMarek VasutNote, defining the CONFIG_SUPPORT_INITRD_RAW allows user to supply 4547 017e1f3fSMarek Vasutkernel with raw initrd images. The syntax is slightly different, the 4548 017e1f3fSMarek Vasutaddress of the initrd must be augmented by it's size, in the following 4549 017e1f3fSMarek Vasutformat: "<initrd addres>:<initrd size>". 4550 017e1f3fSMarek Vasut 4551 c609719bSwdenk 4552 c609719bSwdenkStandalone HOWTO: 4553 c609719bSwdenk================= 4554 c609719bSwdenk 4555 c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4556 c609719bSwdenkrun "standalone" applications, which can use some resources of 4557 c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4558 c609719bSwdenk 4559 c609719bSwdenkTwo simple examples are included with the sources: 4560 c609719bSwdenk 4561 c609719bSwdenk"Hello World" Demo: 4562 c609719bSwdenk------------------- 4563 c609719bSwdenk 4564 c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4565 c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4566 c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4567 c609719bSwdenklike that: 4568 c609719bSwdenk 4569 c609719bSwdenk => loads 4570 c609719bSwdenk ## Ready for S-Record download ... 4571 c609719bSwdenk ~>examples/hello_world.srec 4572 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4573 c609719bSwdenk [file transfer complete] 4574 c609719bSwdenk [connected] 4575 c609719bSwdenk ## Start Addr = 0x00040004 4576 c609719bSwdenk 4577 c609719bSwdenk => go 40004 Hello World! This is a test. 4578 c609719bSwdenk ## Starting application at 0x00040004 ... 4579 c609719bSwdenk Hello World 4580 c609719bSwdenk argc = 7 4581 c609719bSwdenk argv[0] = "40004" 4582 c609719bSwdenk argv[1] = "Hello" 4583 c609719bSwdenk argv[2] = "World!" 4584 c609719bSwdenk argv[3] = "This" 4585 c609719bSwdenk argv[4] = "is" 4586 c609719bSwdenk argv[5] = "a" 4587 c609719bSwdenk argv[6] = "test." 4588 c609719bSwdenk argv[7] = "<NULL>" 4589 c609719bSwdenk Hit any key to exit ... 4590 c609719bSwdenk 4591 c609719bSwdenk ## Application terminated, rc = 0x0 4592 c609719bSwdenk 4593 c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4594 c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4595 c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4596 c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4597 c609719bSwdenkcharacter, but this is just a demo program. The application can be 4598 c609719bSwdenkcontrolled by the following keys: 4599 c609719bSwdenk 4600 c609719bSwdenk ? - print current values og the CPM Timer registers 4601 c609719bSwdenk b - enable interrupts and start timer 4602 c609719bSwdenk e - stop timer and disable interrupts 4603 c609719bSwdenk q - quit application 4604 c609719bSwdenk 4605 c609719bSwdenk => loads 4606 c609719bSwdenk ## Ready for S-Record download ... 4607 c609719bSwdenk ~>examples/timer.srec 4608 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4609 c609719bSwdenk [file transfer complete] 4610 c609719bSwdenk [connected] 4611 c609719bSwdenk ## Start Addr = 0x00040004 4612 c609719bSwdenk 4613 c609719bSwdenk => go 40004 4614 c609719bSwdenk ## Starting application at 0x00040004 ... 4615 c609719bSwdenk TIMERS=0xfff00980 4616 c609719bSwdenk Using timer 1 4617 c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4618 c609719bSwdenk 4619 c609719bSwdenkHit 'b': 4620 c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4621 c609719bSwdenk Enabling timer 4622 c609719bSwdenkHit '?': 4623 c609719bSwdenk [q, b, e, ?] ........ 4624 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4625 c609719bSwdenkHit '?': 4626 c609719bSwdenk [q, b, e, ?] . 4627 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4628 c609719bSwdenkHit '?': 4629 c609719bSwdenk [q, b, e, ?] . 4630 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4631 c609719bSwdenkHit '?': 4632 c609719bSwdenk [q, b, e, ?] . 4633 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4634 c609719bSwdenkHit 'e': 4635 c609719bSwdenk [q, b, e, ?] ...Stopping timer 4636 c609719bSwdenkHit 'q': 4637 c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4638 c609719bSwdenk 4639 c609719bSwdenk 4640 85ec0bccSwdenkMinicom warning: 4641 85ec0bccSwdenk================ 4642 85ec0bccSwdenk 4643 7152b1d0SwdenkOver time, many people have reported problems when trying to use the 4644 85ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 4645 85ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4646 f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 4647 85ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4648 85ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 4649 85ec0bccSwdenk 4650 52f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 4651 52f52c14Swdenkconfiguration to your "File transfer protocols" section: 4652 52f52c14Swdenk 4653 52f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 4654 52f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 4655 52f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 4656 52f52c14Swdenk 4657 52f52c14Swdenk 4658 c609719bSwdenkNetBSD Notes: 4659 c609719bSwdenk============= 4660 c609719bSwdenk 4661 c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4662 c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4663 c609719bSwdenk 4664 c609719bSwdenkBuilding requires a cross environment; it is known to work on 4665 c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4666 c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4667 c609719bSwdenkNote that the cross-powerpc package does not install include files; 4668 c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4669 c609719bSwdenkmissing. This file has to be installed and patched manually: 4670 c609719bSwdenk 4671 c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4672 c609719bSwdenk # mkdir powerpc 4673 c609719bSwdenk # ln -s powerpc machine 4674 c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4675 c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4676 c609719bSwdenk 4677 c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4678 c609719bSwdenkand U-Boot include files. 4679 c609719bSwdenk 4680 c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4681 c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4682 c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4683 c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 4684 2a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4685 c609719bSwdenk 4686 c609719bSwdenk 4687 c609719bSwdenkImplementation Internals: 4688 c609719bSwdenk========================= 4689 c609719bSwdenk 4690 c609719bSwdenkThe following is not intended to be a complete description of every 4691 c609719bSwdenkimplementation detail. However, it should help to understand the 4692 c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4693 c609719bSwdenkhardware. 4694 c609719bSwdenk 4695 c609719bSwdenk 4696 c609719bSwdenkInitial Stack, Global Data: 4697 c609719bSwdenk--------------------------- 4698 c609719bSwdenk 4699 c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4700 c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4701 c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4702 c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4703 c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4704 c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4705 c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4706 c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4707 c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4708 c609719bSwdenklocked as (mis-) used as memory, etc. 4709 c609719bSwdenk 4710 7152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 4711 0668236bSWolfgang Denk U-Boot mailing list: 4712 43d9616cSwdenk 4713 43d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 4714 43d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 4715 43d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 4716 43d9616cSwdenk ... 4717 43d9616cSwdenk 4718 43d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 4719 43d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 4720 43d9616cSwdenk require any physical RAM backing up the cache. The cleverness 4721 43d9616cSwdenk is that the cache is being used as a temporary supply of 4722 43d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 4723 11ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 4724 43d9616cSwdenk can see how this works by studying the cache architecture and 4725 43d9616cSwdenk operation in the architecture and processor-specific manuals. 4726 43d9616cSwdenk 4727 43d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 4728 43d9616cSwdenk is another option for the system designer to use as an 4729 11ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 4730 43d9616cSwdenk option should work for you. Using CS 4 should be fine if your 4731 43d9616cSwdenk board designers haven't used it for something that would 4732 43d9616cSwdenk cause you grief during the initial boot! It is frequently not 4733 43d9616cSwdenk used. 4734 43d9616cSwdenk 4735 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 4736 43d9616cSwdenk with your processor/board/system design. The default value 4737 43d9616cSwdenk you will find in any recent u-boot distribution in 4738 8a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 4739 43d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 4740 43d9616cSwdenk it above 400_0000. Just make sure your board has no resources 4741 43d9616cSwdenk that are supposed to respond to that address! That code in 4742 43d9616cSwdenk start.S has been around a while and should work as is when 4743 43d9616cSwdenk you get the config right. 4744 43d9616cSwdenk 4745 43d9616cSwdenk -Chris Hallinan 4746 43d9616cSwdenk DS4.COM, Inc. 4747 43d9616cSwdenk 4748 c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4749 c609719bSwdenkcode for the initialization procedures: 4750 c609719bSwdenk 4751 c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4752 c609719bSwdenk to write it. 4753 c609719bSwdenk 4754 11ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4755 c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 4756 7152b1d0Swdenk zation is performed later (when relocating to RAM). 4757 c609719bSwdenk 4758 c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4759 c609719bSwdenk that. 4760 c609719bSwdenk 4761 c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4762 c609719bSwdenknormal global data to share information beween the code. But it 4763 c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4764 c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4765 c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4766 c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4767 c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4768 c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4769 c609719bSwdenkreserve for this purpose. 4770 c609719bSwdenk 4771 7152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4772 c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4773 c609719bSwdenkGCC's implementation. 4774 c609719bSwdenk 4775 c609719bSwdenkFor PowerPC, the following registers have specific use: 4776 c609719bSwdenk R1: stack pointer 4777 e7670f6cSWolfgang Denk R2: reserved for system use 4778 c609719bSwdenk R3-R4: parameter passing and return values 4779 c609719bSwdenk R5-R10: parameter passing 4780 c609719bSwdenk R13: small data area pointer 4781 c609719bSwdenk R30: GOT pointer 4782 c609719bSwdenk R31: frame pointer 4783 c609719bSwdenk 4784 e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4785 e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4786 e6bee808SJoakim Tjernlund going back and forth between asm and C) 4787 c609719bSwdenk 4788 e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4789 c609719bSwdenk 4790 c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4791 c609719bSwdenk address of the global data structure is known at compile time), 4792 c609719bSwdenk but it turned out that reserving a register results in somewhat 4793 c609719bSwdenk smaller code - although the code savings are not that big (on 4794 c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4795 c609719bSwdenk 624 text + 127 data). 4796 c609719bSwdenk 4797 c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 4798 4c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 4799 4c58eb55SMike Frysinger 4800 c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 4801 4c58eb55SMike Frysinger 4802 c609719bSwdenkOn ARM, the following registers are used: 4803 c609719bSwdenk 4804 c609719bSwdenk R0: function argument word/integer result 4805 c609719bSwdenk R1-R3: function argument word 4806 c609719bSwdenk R9: GOT pointer 4807 c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4808 c609719bSwdenk R11: argument (frame) pointer 4809 c609719bSwdenk R12: temporary workspace 4810 c609719bSwdenk R13: stack pointer 4811 c609719bSwdenk R14: link register 4812 c609719bSwdenk R15: program counter 4813 c609719bSwdenk 4814 c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4815 c609719bSwdenk 4816 0df01fd3SThomas ChouOn Nios II, the ABI is documented here: 4817 0df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 4818 0df01fd3SThomas Chou 4819 0df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 4820 0df01fd3SThomas Chou 4821 0df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 4822 0df01fd3SThomas Chou to access small data sections, so gp is free. 4823 0df01fd3SThomas Chou 4824 afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4825 afc1ce82SMacpaul Lin 4826 afc1ce82SMacpaul Lin R0-R1: argument/return 4827 afc1ce82SMacpaul Lin R2-R5: argument 4828 afc1ce82SMacpaul Lin R15: temporary register for assembler 4829 afc1ce82SMacpaul Lin R16: trampoline register 4830 afc1ce82SMacpaul Lin R28: frame pointer (FP) 4831 afc1ce82SMacpaul Lin R29: global pointer (GP) 4832 afc1ce82SMacpaul Lin R30: link register (LP) 4833 afc1ce82SMacpaul Lin R31: stack pointer (SP) 4834 afc1ce82SMacpaul Lin PC: program counter (PC) 4835 afc1ce82SMacpaul Lin 4836 afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4837 afc1ce82SMacpaul Lin 4838 d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4839 d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4840 c609719bSwdenk 4841 c609719bSwdenkMemory Management: 4842 c609719bSwdenk------------------ 4843 c609719bSwdenk 4844 c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4845 c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4846 c609719bSwdenk 4847 c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4848 c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4849 c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4850 c609719bSwdenkphysical memory banks. 4851 c609719bSwdenk 4852 c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4853 c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4854 c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4855 c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 4856 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4857 c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4858 c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4859 c609719bSwdenk 4860 c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4861 c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4862 c609719bSwdenk 4863 c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4864 c609719bSwdenkthis: 4865 c609719bSwdenk 4866 c609719bSwdenk 0x0000 0000 Exception Vector code 4867 c609719bSwdenk : 4868 c609719bSwdenk 0x0000 1FFF 4869 c609719bSwdenk 0x0000 2000 Free for Application Use 4870 c609719bSwdenk : 4871 c609719bSwdenk : 4872 c609719bSwdenk 4873 c609719bSwdenk : 4874 c609719bSwdenk : 4875 c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4876 c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4877 c609719bSwdenk 0x00FC 0000 Malloc Arena 4878 c609719bSwdenk : 4879 c609719bSwdenk 0x00FD FFFF 4880 c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4881 c609719bSwdenk ... eventually: LCD or video framebuffer 4882 c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4883 c609719bSwdenk 0x00FF FFFF [End of RAM] 4884 c609719bSwdenk 4885 c609719bSwdenk 4886 c609719bSwdenkSystem Initialization: 4887 c609719bSwdenk---------------------- 4888 c609719bSwdenk 4889 c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 4890 11ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4891 c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 4892 7152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4893 c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4894 c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4895 c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4896 c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4897 c609719bSwdenkthe caches and the SIU. 4898 c609719bSwdenk 4899 c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4900 c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4901 c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4902 c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4903 c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4904 c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4905 c609719bSwdenkbanks. 4906 c609719bSwdenk 4907 c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 4908 7152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4909 c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4910 c609719bSwdenk0x00000000, with any additional banks following immediately to create 4911 c609719bSwdenkcontiguous memory starting from 0. 4912 c609719bSwdenk 4913 c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4914 c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4915 c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4916 c609719bSwdenkpages, and the final stack is set up. 4917 c609719bSwdenk 4918 c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4919 c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4920 c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4921 c609719bSwdenknew address in RAM. 4922 c609719bSwdenk 4923 c609719bSwdenk 4924 c609719bSwdenkU-Boot Porting Guide: 4925 c609719bSwdenk---------------------- 4926 c609719bSwdenk 4927 c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 4928 6aff3115Swdenklist, October 2002] 4929 c609719bSwdenk 4930 c609719bSwdenk 4931 c609719bSwdenkint main(int argc, char *argv[]) 4932 c609719bSwdenk{ 4933 c609719bSwdenk sighandler_t no_more_time; 4934 c609719bSwdenk 4935 c609719bSwdenk signal(SIGALRM, no_more_time); 4936 c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4937 c609719bSwdenk 4938 c609719bSwdenk if (available_money > available_manpower) { 4939 6c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4940 c609719bSwdenk return 0; 4941 c609719bSwdenk } 4942 c609719bSwdenk 4943 c609719bSwdenk Download latest U-Boot source; 4944 c609719bSwdenk 4945 0668236bSWolfgang Denk Subscribe to u-boot mailing list; 4946 6aff3115Swdenk 4947 6c3fef28SJerry Van Baren if (clueless) 4948 c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4949 c609719bSwdenk 4950 c609719bSwdenk while (learning) { 4951 c609719bSwdenk Read the README file in the top level directory; 4952 7cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 4953 6c3fef28SJerry Van Baren Read applicable doc/*.README; 4954 c609719bSwdenk Read the source, Luke; 4955 6c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4956 c609719bSwdenk } 4957 c609719bSwdenk 4958 6c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 4959 6c3fef28SJerry Van Baren Buy a BDI3000; 4960 6c3fef28SJerry Van Baren else 4961 c609719bSwdenk Add a lot of aggravation and time; 4962 c609719bSwdenk 4963 6c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 4964 6c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 4965 6c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 4966 6c3fef28SJerry Van Baren } else { 4967 c609719bSwdenk Create your own board support subdirectory; 4968 6c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 4969 6c3fef28SJerry Van Baren } 4970 6c3fef28SJerry Van Baren Edit new board/<myboard> files 4971 6c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4972 c609719bSwdenk 4973 6c3fef28SJerry Van Baren while (!accepted) { 4974 c609719bSwdenk while (!running) { 4975 c609719bSwdenk do { 4976 c609719bSwdenk Add / modify source code; 4977 c609719bSwdenk } until (compiles); 4978 c609719bSwdenk Debug; 4979 c609719bSwdenk if (clueless) 4980 c609719bSwdenk email("Hi, I am having problems..."); 4981 c609719bSwdenk } 4982 6c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 4983 6c3fef28SJerry Van Baren if (reasonable critiques) 4984 6c3fef28SJerry Van Baren Incorporate improvements from email list code review; 4985 6c3fef28SJerry Van Baren else 4986 6c3fef28SJerry Van Baren Defend code as written; 4987 6c3fef28SJerry Van Baren } 4988 c609719bSwdenk 4989 c609719bSwdenk return 0; 4990 c609719bSwdenk} 4991 c609719bSwdenk 4992 c609719bSwdenkvoid no_more_time (int sig) 4993 c609719bSwdenk{ 4994 c609719bSwdenk hire_a_guru(); 4995 c609719bSwdenk} 4996 c609719bSwdenk 4997 c609719bSwdenk 4998 c609719bSwdenkCoding Standards: 4999 c609719bSwdenk----------------- 5000 c609719bSwdenk 5001 c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 5002 2c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 5003 7ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 5004 c609719bSwdenk 5005 2c051651SDetlev ZundelSource files originating from a different project (for example the 5006 2c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 5007 2c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 5008 2c051651SDetlev Zundelsources. 5009 2c051651SDetlev Zundel 5010 2c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 5011 2c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 5012 2c051651SDetlev Zundelin your code. 5013 c609719bSwdenk 5014 c178d3daSwdenkPlease also stick to the following formatting rules: 5015 180d3f74Swdenk- remove any trailing white space 5016 7ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 5017 180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 5018 7ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 5019 180d3f74Swdenk- do not add trailing empty lines to source files 5020 180d3f74Swdenk 5021 c609719bSwdenkSubmissions which do not conform to the standards may be returned 5022 c609719bSwdenkwith a request to reformat the changes. 5023 c609719bSwdenk 5024 c609719bSwdenk 5025 c609719bSwdenkSubmitting Patches: 5026 c609719bSwdenk------------------- 5027 c609719bSwdenk 5028 c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 5029 c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 5030 c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 5031 c609719bSwdenk 5032 0d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 5033 218ca724SWolfgang Denk 5034 0668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 5035 0668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 5036 0668236bSWolfgang Denk 5037 c609719bSwdenkWhen you send a patch, please include the following information with 5038 c609719bSwdenkit: 5039 c609719bSwdenk 5040 c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 5041 c609719bSwdenk this bug. Please try to include a way of demonstrating that the 5042 c609719bSwdenk patch actually fixes something. 5043 c609719bSwdenk 5044 c609719bSwdenk* For new features: a description of the feature and your 5045 c609719bSwdenk implementation. 5046 c609719bSwdenk 5047 c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 5048 c609719bSwdenk 5049 c609719bSwdenk* For major contributions, your entry to the CREDITS file 5050 c609719bSwdenk 5051 c609719bSwdenk* When you add support for a new board, don't forget to add this 5052 7ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 5053 c609719bSwdenk 5054 c609719bSwdenk* If your patch adds new configuration options, don't forget to 5055 c609719bSwdenk document these in the README file. 5056 c609719bSwdenk 5057 218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 5058 218ca724SWolfgang Denk recommended) you can easily generate the patch using the 5059 7ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 5060 218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 5061 218ca724SWolfgang Denk with some other mail clients. 5062 c609719bSwdenk 5063 218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 5064 218ca724SWolfgang Denk diff does not support these options, then get the latest version of 5065 218ca724SWolfgang Denk GNU diff. 5066 6dff5529Swdenk 5067 218ca724SWolfgang Denk The current directory when running this command shall be the parent 5068 218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 5069 218ca724SWolfgang Denk your patch includes sufficient directory information for the 5070 218ca724SWolfgang Denk affected files). 5071 218ca724SWolfgang Denk 5072 218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 5073 218ca724SWolfgang Denk and compressed attachments must not be used. 5074 c609719bSwdenk 5075 52f52c14Swdenk* If one logical set of modifications affects or creates several 5076 52f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 5077 52f52c14Swdenk 5078 52f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 5079 52f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 5080 52f52c14Swdenk 5081 52f52c14Swdenk 5082 c609719bSwdenkNotes: 5083 c609719bSwdenk 5084 c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 5085 c609719bSwdenk source tree and make sure that no errors or warnings are reported 5086 c609719bSwdenk for any of the boards. 5087 c609719bSwdenk 5088 c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 5089 c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 5090 c609719bSwdenk returned with a request to re-formatting / split it. 5091 c609719bSwdenk 5092 c609719bSwdenk* If you modify existing code, make sure that your new code does not 5093 c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 5094 c609719bSwdenk When adding new features, these should compile conditionally only 5095 c609719bSwdenk (using #ifdef), and the resulting code with the new feature 5096 c609719bSwdenk disabled must not need more memory than the old code without your 5097 c609719bSwdenk modification. 5098 90dc6704Swdenk 5099 0668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 5100 0668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 5101 0668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 5102 0668236bSWolfgang Denk bigger than the size limit should be avoided. 5103