1 c609719bSwdenk# 2 6abe6fb6SDetlev Zundel# (C) Copyright 2000 - 2011 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 8d321b81SPeter Tyser /at91rm9200 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 8d321b81SPeter Tyser /lib Architecture specific library files 184 8d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 185 8d321b81SPeter Tyser /cpu CPU specific files 186 8d321b81SPeter Tyser /lib Architecture specific library files 187 a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 188 8d321b81SPeter Tyser /cpu CPU specific files 189 8d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 190 8d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 191 8d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 192 8d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 193 8d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 194 8d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 195 8d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 196 8d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 197 8d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 198 8d321b81SPeter Tyser /lib Architecture specific library files 199 8d321b81SPeter Tyser /sh Files generic to SH architecture 200 8d321b81SPeter Tyser /cpu CPU specific files 201 8d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 202 8d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 203 8d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 204 8d321b81SPeter Tyser /lib Architecture specific library files 205 8d321b81SPeter Tyser /sparc Files generic to SPARC architecture 206 8d321b81SPeter Tyser /cpu CPU specific files 207 8d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 208 8d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 209 8d321b81SPeter Tyser /lib Architecture specific library files 210 8d321b81SPeter Tyser/api Machine/arch independent API for external apps 211 8d321b81SPeter Tyser/board Board dependent files 212 8d321b81SPeter Tyser/common Misc architecture independent functions 213 8d321b81SPeter Tyser/disk Code for disk drive partition handling 214 8d321b81SPeter Tyser/doc Documentation (don't expect too much) 215 8d321b81SPeter Tyser/drivers Commonly used device drivers 216 8d321b81SPeter Tyser/examples Example code for standalone applications, etc. 217 8d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 218 8d321b81SPeter Tyser/include Header Files 219 8d321b81SPeter Tyser/lib Files generic to all architectures 220 8d321b81SPeter Tyser /libfdt Library files to support flattened device trees 221 8d321b81SPeter Tyser /lzma Library files to support LZMA decompression 222 8d321b81SPeter Tyser /lzo Library files to support LZO decompression 223 8d321b81SPeter Tyser/net Networking code 224 8d321b81SPeter Tyser/post Power On Self Test 225 8d321b81SPeter Tyser/rtc Real Time Clock drivers 226 8d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 227 c609719bSwdenk 228 c609719bSwdenkSoftware Configuration: 229 c609719bSwdenk======================= 230 c609719bSwdenk 231 c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 232 c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 233 c609719bSwdenk 234 c609719bSwdenkThere are two classes of configuration variables: 235 c609719bSwdenk 236 c609719bSwdenk* Configuration _OPTIONS_: 237 c609719bSwdenk These are selectable by the user and have names beginning with 238 c609719bSwdenk "CONFIG_". 239 c609719bSwdenk 240 c609719bSwdenk* Configuration _SETTINGS_: 241 c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 242 c609719bSwdenk you don't know what you're doing; they have names beginning with 243 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 244 c609719bSwdenk 245 c609719bSwdenkLater we will add a configuration tool - probably similar to or even 246 c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 247 c609719bSwdenkdo the configuration by hand, which means creating some symbolic 248 c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 249 c609719bSwdenkas an example here. 250 c609719bSwdenk 251 c609719bSwdenk 252 c609719bSwdenkSelection of Processor Architecture and Board Type: 253 c609719bSwdenk--------------------------------------------------- 254 c609719bSwdenk 255 c609719bSwdenkFor all supported boards there are ready-to-use default 256 c609719bSwdenkconfigurations available; just type "make <board_name>_config". 257 c609719bSwdenk 258 c609719bSwdenkExample: For a TQM823L module type: 259 c609719bSwdenk 260 c609719bSwdenk cd u-boot 261 c609719bSwdenk make TQM823L_config 262 c609719bSwdenk 263 11ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 264 c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 265 c609719bSwdenkdirectory according to the instructions in cogent/README. 266 c609719bSwdenk 267 c609719bSwdenk 268 c609719bSwdenkConfiguration Options: 269 c609719bSwdenk---------------------- 270 c609719bSwdenk 271 c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 272 c609719bSwdenksuch information is kept in a configuration file 273 c609719bSwdenk"include/configs/<board_name>.h". 274 c609719bSwdenk 275 c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 276 c609719bSwdenk"include/configs/TQM823L.h". 277 c609719bSwdenk 278 c609719bSwdenk 279 7f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 280 7f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 281 7f6c2cbcSwdenkbuild a config tool - later. 282 7f6c2cbcSwdenk 283 7f6c2cbcSwdenk 284 c609719bSwdenkThe following options need to be configured: 285 c609719bSwdenk 286 2628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 287 c609719bSwdenk 288 2628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 289 6ccec449SWolfgang Denk 290 6ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 291 09ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 292 c609719bSwdenk 293 c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 294 c609719bSwdenk Define exactly one of 295 c609719bSwdenk CONFIG_CMA286_60_OLD 296 c609719bSwdenk--- FIXME --- not tested yet: 297 c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 298 c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 299 c609719bSwdenk 300 c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 301 c609719bSwdenk Define exactly one of 302 c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 303 c609719bSwdenk 304 c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 305 c609719bSwdenk Define one or more of 306 c609719bSwdenk CONFIG_CMA302 307 c609719bSwdenk 308 c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 309 c609719bSwdenk Define one or more of 310 c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 311 11ccc33fSMarcel Ziswiler the LCD display every second with 312 c609719bSwdenk a "rotator" |\-/|\-/ 313 c609719bSwdenk 314 2535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 315 2535d602Swdenk CONFIG_ADSTYPE 316 2535d602Swdenk Possible values are: 317 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 318 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 319 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 320 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 321 2535d602Swdenk 322 cf946c6dSLei Wen- Marvell Family Member 323 cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 324 cf946c6dSLei Wen multiple fs option at one time 325 cf946c6dSLei Wen for marvell soc family 326 cf946c6dSLei Wen 327 c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 328 c609719bSwdenk Define exactly one of 329 c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 330 c609719bSwdenk 331 11ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 332 66ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 333 66ca92a5Swdenk get_gclk_freq() cannot work 334 5da627a4Swdenk e.g. if there is no 32KHz 335 5da627a4Swdenk reference PIT/RTC clock 336 66ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 337 66ca92a5Swdenk or XTAL/EXTAL) 338 c609719bSwdenk 339 66ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 340 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 341 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 342 66ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 343 75d1ea7fSwdenk See doc/README.MPC866 344 75d1ea7fSwdenk 345 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 346 75d1ea7fSwdenk 347 75d1ea7fSwdenk Define this to measure the actual CPU clock instead 348 75d1ea7fSwdenk of relying on the correctness of the configured 349 75d1ea7fSwdenk values. Mostly useful for board bringup to make sure 350 75d1ea7fSwdenk the PLL is locked at the intended frequency. Note 351 75d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 352 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 353 75d1ea7fSwdenk 354 506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 355 506f3918SHeiko Schocher 356 506f3918SHeiko Schocher Define this option if you want to enable the 357 506f3918SHeiko Schocher ICache only when Code runs from RAM. 358 506f3918SHeiko Schocher 359 66412c63SKumar Gala- 85xx CPU Options: 360 66412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 361 66412c63SKumar Gala 362 66412c63SKumar Gala Defines the core time base clock divider ratio compared to the 363 66412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 364 66412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 365 66412c63SKumar Gala 366 8f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 367 8f29084aSKumar Gala 368 8f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 369 8f29084aSKumar Gala tree nodes for the given platform. 370 8f29084aSKumar Gala 371 0b953ffcSMarkus Klotzbuecher- Intel Monahans options: 372 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 373 0b953ffcSMarkus Klotzbuecher 374 0b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 375 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 376 0b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 377 0b953ffcSMarkus Klotzbuecher 378 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 379 0b953ffcSMarkus Klotzbuecher 380 0b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 381 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 382 0b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 383 0b953ffcSMarkus Klotzbuecher by this value. 384 0b953ffcSMarkus Klotzbuecher 385 5da627a4Swdenk- Linux Kernel Interface: 386 c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 387 c609719bSwdenk 388 c609719bSwdenk U-Boot stores all clock information in Hz 389 c609719bSwdenk internally. For binary compatibility with older Linux 390 c609719bSwdenk kernels (which expect the clocks passed in the 391 c609719bSwdenk bd_info data to be in MHz) the environment variable 392 c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 393 c609719bSwdenk converts clock data to MHZ before passing it to the 394 c609719bSwdenk Linux kernel. 395 c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 396 c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 397 c609719bSwdenk default environment. 398 c609719bSwdenk 399 5da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 400 5da627a4Swdenk 401 11ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 402 5da627a4Swdenk expect it to be in bytes, others in MB. 403 5da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 404 5da627a4Swdenk 405 fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 406 f57f70aaSWolfgang Denk 407 f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 408 213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 409 213bf8c8SGerald Van Baren concepts). 410 213bf8c8SGerald Van Baren 411 213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 412 213bf8c8SGerald Van Baren * New libfdt-based support 413 213bf8c8SGerald Van Baren * Adds the "fdt" command 414 3bb342fcSKim Phillips * The bootm command automatically updates the fdt 415 213bf8c8SGerald Van Baren 416 b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 417 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 418 b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 419 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 420 f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 421 c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 422 f57f70aaSWolfgang Denk 423 11ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 424 11ccc33fSMarcel Ziswiler addresses 425 3bb342fcSKim Phillips 426 4e253137SKumar Gala CONFIG_OF_BOARD_SETUP 427 4e253137SKumar Gala 428 4e253137SKumar Gala Board code has addition modification that it wants to make 429 4e253137SKumar Gala to the flat device tree before handing it off to the kernel 430 6705d81eSwdenk 431 0267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 432 0267768eSMatthew McClintock 433 11ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 434 0267768eSMatthew McClintock param header, the default value is zero if undefined. 435 0267768eSMatthew McClintock 436 3887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 437 3887c3fbSHeiko Schocher 438 3887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 439 3887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 440 3887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 441 3887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 442 3887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 443 3887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 444 3887c3fbSHeiko Schocher 445 0b2f4ecaSNiklaus Giger- vxWorks boot parameters: 446 0b2f4ecaSNiklaus Giger 447 0b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 448 0b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 449 0b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 450 0b2f4ecaSNiklaus Giger 451 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 452 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 453 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 454 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 455 0b2f4ecaSNiklaus Giger 456 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 457 0b2f4ecaSNiklaus Giger 458 0b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 459 0b2f4ecaSNiklaus Giger 460 0b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 461 0b2f4ecaSNiklaus Giger the defaults discussed just above. 462 0b2f4ecaSNiklaus Giger 463 2c451f78SAneesh V- Cache Configuration: 464 2c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 465 2c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 466 2c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 467 2c451f78SAneesh V 468 93bc2193SAneesh V- Cache Configuration for ARM: 469 93bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 470 93bc2193SAneesh V controller 471 93bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 472 93bc2193SAneesh V controller register space 473 93bc2193SAneesh V 474 6705d81eSwdenk- Serial Ports: 475 48d0192fSAndreas Engel CONFIG_PL010_SERIAL 476 6705d81eSwdenk 477 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 478 6705d81eSwdenk 479 48d0192fSAndreas Engel CONFIG_PL011_SERIAL 480 6705d81eSwdenk 481 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 482 6705d81eSwdenk 483 6705d81eSwdenk CONFIG_PL011_CLOCK 484 6705d81eSwdenk 485 6705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 486 6705d81eSwdenk the clock speed of the UARTs. 487 6705d81eSwdenk 488 6705d81eSwdenk CONFIG_PL01x_PORTS 489 6705d81eSwdenk 490 6705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 491 6705d81eSwdenk define this to a list of base addresses for each (supported) 492 6705d81eSwdenk port. See e.g. include/configs/versatile.h 493 6705d81eSwdenk 494 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 495 910f1ae3SJohn Rigby 496 910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 497 910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 498 910f1ae3SJohn Rigby this variable to initialize the extra register. 499 910f1ae3SJohn Rigby 500 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 501 910f1ae3SJohn Rigby 502 910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 503 910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 504 910f1ae3SJohn Rigby variable to flush the UART at init time. 505 910f1ae3SJohn Rigby 506 6705d81eSwdenk 507 c609719bSwdenk- Console Interface: 508 c609719bSwdenk Depending on board, define exactly one serial port 509 c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 510 c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 511 c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 512 c609719bSwdenk 513 c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 514 c609719bSwdenk port routines must be defined elsewhere 515 c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 516 c609719bSwdenk 517 c609719bSwdenk CONFIG_CFB_CONSOLE 518 c609719bSwdenk Enables console device for a color framebuffer. Needs following 519 c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 520 c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 521 c609719bSwdenk (default big endian) 522 c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 523 c609719bSwdenk rectangle fill 524 c609719bSwdenk (cf. smiLynxEM) 525 c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 526 c609719bSwdenk bit-blit (cf. smiLynxEM) 527 c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 528 c609719bSwdenk (cols=pitch) 529 c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 530 c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 531 c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 532 c609719bSwdenk (0-5, cf. cfb_console.c) 533 c609719bSwdenk VIDEO_FB_ADRS framebuffer address 534 c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 535 c609719bSwdenk (i.e. i8042_kbd_init()) 536 c609719bSwdenk VIDEO_TSTC_FCT test char fct 537 c609719bSwdenk (i.e. i8042_tstc) 538 c609719bSwdenk VIDEO_GETC_FCT get char fct 539 c609719bSwdenk (i.e. i8042_getc) 540 c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 541 c609719bSwdenk (requires blink timer 542 c609719bSwdenk cf. i8042.c) 543 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 544 c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 545 c609719bSwdenk upper right corner 546 602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 547 c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 548 c609719bSwdenk upper left corner 549 a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 550 a6c7ad2fSwdenk linux_logo.h for logo. 551 a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 552 c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 553 11ccc33fSMarcel Ziswiler additional board info beside 554 c609719bSwdenk the logo 555 c609719bSwdenk 556 c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 557 c609719bSwdenk default i/o. Serial console can be forced with 558 c609719bSwdenk environment 'console=serial'. 559 c609719bSwdenk 560 a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 561 a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 562 a3ad8e26Swdenk the "silent" environment variable. See 563 a3ad8e26Swdenk doc/README.silent for more information. 564 a3ad8e26Swdenk 565 c609719bSwdenk- Console Baudrate: 566 c609719bSwdenk CONFIG_BAUDRATE - in bps 567 c609719bSwdenk Select one of the baudrates listed in 568 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 569 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 570 c609719bSwdenk 571 c92fac91SHeiko Schocher- Console Rx buffer length 572 c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 573 c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 574 2b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 575 c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 576 c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 577 c92fac91SHeiko Schocher the SMC. 578 c92fac91SHeiko Schocher 579 c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 580 c609719bSwdenk Delay before automatically booting the default image; 581 c609719bSwdenk set to -1 to disable autoboot. 582 c609719bSwdenk 583 c609719bSwdenk See doc/README.autoboot for these options that 584 c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 585 c609719bSwdenk CONFIG_BOOT_RETRY_TIME 586 c609719bSwdenk CONFIG_BOOT_RETRY_MIN 587 c609719bSwdenk CONFIG_AUTOBOOT_KEYED 588 c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 589 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 590 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 591 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 592 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 593 c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 594 c609719bSwdenk CONFIG_RESET_TO_RETRY 595 c609719bSwdenk 596 c609719bSwdenk- Autoboot Command: 597 c609719bSwdenk CONFIG_BOOTCOMMAND 598 c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 599 c609719bSwdenk define a command string that is automatically executed 600 c609719bSwdenk when no character is read on the console interface 601 c609719bSwdenk within "Boot Delay" after reset. 602 c609719bSwdenk 603 c609719bSwdenk CONFIG_BOOTARGS 604 c609719bSwdenk This can be used to pass arguments to the bootm 605 c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 606 c609719bSwdenk environment value "bootargs". 607 c609719bSwdenk 608 c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 609 c609719bSwdenk The value of these goes into the environment as 610 c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 611 c609719bSwdenk as a convenience, when switching between booting from 612 11ccc33fSMarcel Ziswiler RAM and NFS. 613 c609719bSwdenk 614 c609719bSwdenk- Pre-Boot Commands: 615 c609719bSwdenk CONFIG_PREBOOT 616 c609719bSwdenk 617 c609719bSwdenk When this option is #defined, the existence of the 618 c609719bSwdenk environment variable "preboot" will be checked 619 c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 620 c609719bSwdenk countdown and/or running the auto-boot command resp. 621 c609719bSwdenk entering interactive mode. 622 c609719bSwdenk 623 c609719bSwdenk This feature is especially useful when "preboot" is 624 c609719bSwdenk automatically generated or modified. For an example 625 c609719bSwdenk see the LWMON board specific code: here "preboot" is 626 c609719bSwdenk modified when the user holds down a certain 627 c609719bSwdenk combination of keys on the (special) keyboard when 628 c609719bSwdenk booting the systems 629 c609719bSwdenk 630 c609719bSwdenk- Serial Download Echo Mode: 631 c609719bSwdenk CONFIG_LOADS_ECHO 632 c609719bSwdenk If defined to 1, all characters received during a 633 c609719bSwdenk serial download (using the "loads" command) are 634 c609719bSwdenk echoed back. This might be needed by some terminal 635 c609719bSwdenk emulations (like "cu"), but may as well just take 636 c609719bSwdenk time on others. This setting #define's the initial 637 c609719bSwdenk value of the "loads_echo" environment variable. 638 c609719bSwdenk 639 602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 640 c609719bSwdenk CONFIG_KGDB_BAUDRATE 641 c609719bSwdenk Select one of the baudrates listed in 642 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 643 c609719bSwdenk 644 c609719bSwdenk- Monitor Functions: 645 602ad3b3SJon Loeliger Monitor commands can be included or excluded 646 602ad3b3SJon Loeliger from the build by using the #include files 647 602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 648 602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 649 602ad3b3SJon Loeliger and augmenting with additional #define's 650 602ad3b3SJon Loeliger for wanted commands. 651 c609719bSwdenk 652 602ad3b3SJon Loeliger The default command configuration includes all commands 653 602ad3b3SJon Loeliger except those marked below with a "*". 654 602ad3b3SJon Loeliger 655 602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 656 602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 657 602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 658 602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 659 602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 660 602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 661 602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 662 602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 663 710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 664 602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 665 602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 666 602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 667 a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 668 a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 669 a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 670 a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 671 602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 672 602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 673 246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 674 602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 675 602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 676 0c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 677 bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 678 602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 679 602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 680 602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 681 602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 682 602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 683 a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 684 a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 685 602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 686 602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 687 602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 688 602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 689 602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 690 602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 691 0c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 692 602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 693 602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 694 602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 695 602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 696 1ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 697 602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 698 602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 699 02c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 700 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 701 602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 702 56523f12Swdenk loop, loopw, mtest 703 602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 704 602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 705 602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 706 68d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 707 602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 708 602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 709 e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 710 e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 711 602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 712 602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 713 602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 714 602ad3b3SJon Loeliger host 715 602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 716 602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 717 602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 718 602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 719 602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 720 602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 721 602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 722 602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 723 602ad3b3SJon Loeliger (4xx only) 724 c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 725 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 726 74de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 727 602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 728 7a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 729 602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 730 602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 731 602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 732 c609719bSwdenk 733 c609719bSwdenk 734 c609719bSwdenk EXAMPLE: If you want all functions except of network 735 c609719bSwdenk support you can write: 736 c609719bSwdenk 737 602ad3b3SJon Loeliger #include "config_cmd_all.h" 738 602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 739 c609719bSwdenk 740 213bf8c8SGerald Van Baren Other Commands: 741 213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 742 c609719bSwdenk 743 c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 744 602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 745 c609719bSwdenk what you (and your U-Boot users) are doing. Data 746 c609719bSwdenk cache cannot be enabled on systems like the 8xx or 747 c609719bSwdenk 8260 (where accesses to the IMMR region must be 748 c609719bSwdenk uncached), and it cannot be disabled on all other 749 c609719bSwdenk systems where we (mis-) use the data cache to hold an 750 c609719bSwdenk initial stack and some data. 751 c609719bSwdenk 752 c609719bSwdenk 753 c609719bSwdenk XXX - this list needs to get updated! 754 c609719bSwdenk 755 c609719bSwdenk- Watchdog: 756 c609719bSwdenk CONFIG_WATCHDOG 757 c609719bSwdenk If this variable is defined, it enables watchdog 758 6abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 759 6abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 760 6abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 761 6abe6fb6SDetlev Zundel register. When supported for a specific SoC is 762 6abe6fb6SDetlev Zundel available, then no further board specific code should 763 6abe6fb6SDetlev Zundel be needed to use it. 764 6abe6fb6SDetlev Zundel 765 6abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 766 6abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 767 6abe6fb6SDetlev Zundel SoC, then define this variable and provide board 768 6abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 769 c609719bSwdenk 770 c1551ea8Sstroese- U-Boot Version: 771 c1551ea8Sstroese CONFIG_VERSION_VARIABLE 772 c1551ea8Sstroese If this variable is defined, an environment variable 773 c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 774 c1551ea8Sstroese version as printed by the "version" command. 775 c1551ea8Sstroese This variable is readonly. 776 c1551ea8Sstroese 777 c609719bSwdenk- Real-Time Clock: 778 c609719bSwdenk 779 602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 780 c609719bSwdenk has to be selected, too. Define exactly one of the 781 c609719bSwdenk following options: 782 c609719bSwdenk 783 c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 784 c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 785 7ce63709SGuennadi Liakhovetski CONFIG_RTC_MC13783 - use MC13783 RTC 786 c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 787 1cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 788 c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 789 7f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 790 3bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 791 9536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 792 4c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 793 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 794 71d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 795 71d19f30SHeiko Schocher RV3029 RTC. 796 c609719bSwdenk 797 b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 798 b37c7e5eSwdenk must also be configured. See I2C Support, below. 799 b37c7e5eSwdenk 800 e92739d3SPeter Tyser- GPIO Support: 801 e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 802 e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 803 e92739d3SPeter Tyser 804 5dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 805 5dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 806 5dec49caSChris Packham pins supported by a particular chip. 807 5dec49caSChris Packham 808 e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 809 e92739d3SPeter Tyser must also be configured. See I2C Support, below. 810 e92739d3SPeter Tyser 811 c609719bSwdenk- Timestamp Support: 812 c609719bSwdenk 813 c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 814 c609719bSwdenk (date and time) of an image is printed by image 815 c609719bSwdenk commands like bootm or iminfo. This option is 816 602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 817 c609719bSwdenk 818 c609719bSwdenk- Partition Support: 819 c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 820 07f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 821 c609719bSwdenk 822 602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 823 218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 824 218ca724SWolfgang Denk least one partition type as well. 825 c609719bSwdenk 826 c609719bSwdenk- IDE Reset method: 827 4d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 828 4d13cbadSwdenk board configurations files but used nowhere! 829 c609719bSwdenk 830 4d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 831 4d13cbadSwdenk be performed by calling the function 832 4d13cbadSwdenk ide_set_reset(int reset) 833 4d13cbadSwdenk which has to be defined in a board specific file 834 c609719bSwdenk 835 c609719bSwdenk- ATAPI Support: 836 c609719bSwdenk CONFIG_ATAPI 837 c609719bSwdenk 838 c609719bSwdenk Set this to enable ATAPI support. 839 c609719bSwdenk 840 c40b2956Swdenk- LBA48 Support 841 c40b2956Swdenk CONFIG_LBA48 842 c40b2956Swdenk 843 c40b2956Swdenk Set this to enable support for disks larger than 137GB 844 4b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 845 c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 846 c40b2956Swdenk support disks up to 2.1TB. 847 c40b2956Swdenk 848 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 849 c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 850 c40b2956Swdenk Default is 32bit. 851 c40b2956Swdenk 852 c609719bSwdenk- SCSI Support: 853 c609719bSwdenk At the moment only there is only support for the 854 c609719bSwdenk SYM53C8XX SCSI controller; define 855 c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 856 c609719bSwdenk 857 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 858 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 859 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 860 c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 861 c609719bSwdenk devices. 862 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 863 c609719bSwdenk 864 c609719bSwdenk- NETWORK Support (PCI): 865 682011ffSwdenk CONFIG_E1000 866 682011ffSwdenk Support for Intel 8254x gigabit chips. 867 682011ffSwdenk 868 ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 869 11ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 870 ac3315c2SAndre Schwarz 871 c609719bSwdenk CONFIG_EEPRO100 872 c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 873 11ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 874 c609719bSwdenk write routine for first time initialisation. 875 c609719bSwdenk 876 c609719bSwdenk CONFIG_TULIP 877 c609719bSwdenk Support for Digital 2114x chips. 878 c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 879 c609719bSwdenk modem chip initialisation (KS8761/QS6611). 880 c609719bSwdenk 881 c609719bSwdenk CONFIG_NATSEMI 882 c609719bSwdenk Support for National dp83815 chips. 883 c609719bSwdenk 884 c609719bSwdenk CONFIG_NS8382X 885 c609719bSwdenk Support for National dp8382[01] gigabit chips. 886 c609719bSwdenk 887 45219c46Swdenk- NETWORK Support (other): 888 45219c46Swdenk 889 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 890 c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 891 c041e9d2SJens Scharsig 892 c041e9d2SJens Scharsig CONFIG_RMII 893 c041e9d2SJens Scharsig Define this to use reduced MII inteface 894 c041e9d2SJens Scharsig 895 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 896 c041e9d2SJens Scharsig If this defined, the driver is quiet. 897 c041e9d2SJens Scharsig The driver doen't show link status messages. 898 c041e9d2SJens Scharsig 899 45219c46Swdenk CONFIG_DRIVER_LAN91C96 900 45219c46Swdenk Support for SMSC's LAN91C96 chips. 901 45219c46Swdenk 902 45219c46Swdenk CONFIG_LAN91C96_BASE 903 45219c46Swdenk Define this to hold the physical address 904 45219c46Swdenk of the LAN91C96's I/O space 905 45219c46Swdenk 906 45219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 907 45219c46Swdenk Define this to enable 32 bit addressing 908 45219c46Swdenk 909 f39748aeSwdenk CONFIG_DRIVER_SMC91111 910 f39748aeSwdenk Support for SMSC's LAN91C111 chip 911 f39748aeSwdenk 912 f39748aeSwdenk CONFIG_SMC91111_BASE 913 f39748aeSwdenk Define this to hold the physical address 914 f39748aeSwdenk of the device (I/O space) 915 f39748aeSwdenk 916 f39748aeSwdenk CONFIG_SMC_USE_32_BIT 917 f39748aeSwdenk Define this if data bus is 32 bits 918 f39748aeSwdenk 919 f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 920 f39748aeSwdenk Define this to use i/o functions instead of macros 921 f39748aeSwdenk (some hardware wont work with macros) 922 f39748aeSwdenk 923 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 924 b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 925 b3dbf4a5SMacpaul Lin 926 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 927 b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 928 b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 929 b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 930 b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 931 b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 932 b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 933 b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 934 b3dbf4a5SMacpaul Lin 935 c2fff331SMike Rapoport CONFIG_SMC911X 936 557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 937 557b377dSJens Gehrlein 938 c2fff331SMike Rapoport CONFIG_SMC911X_BASE 939 557b377dSJens Gehrlein Define this to hold the physical address 940 557b377dSJens Gehrlein of the device (I/O space) 941 557b377dSJens Gehrlein 942 c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 943 557b377dSJens Gehrlein Define this if data bus is 32 bits 944 557b377dSJens Gehrlein 945 c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 946 557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 947 557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 948 c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 949 557b377dSJens Gehrlein 950 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 951 3d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 952 3d0075faSYoshihiro Shimoda 953 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 954 3d0075faSYoshihiro Shimoda Define the number of ports to be used 955 3d0075faSYoshihiro Shimoda 956 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 957 3d0075faSYoshihiro Shimoda Define the ETH PHY's address 958 3d0075faSYoshihiro Shimoda 959 68260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 960 68260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 961 68260aabSYoshihiro Shimoda 962 c609719bSwdenk- USB Support: 963 c609719bSwdenk At the moment only the UHCI host controller is 964 4d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 965 c609719bSwdenk CONFIG_USB_UHCI to enable it. 966 c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 967 30d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 968 c609719bSwdenk storage devices. 969 c609719bSwdenk Note: 970 c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 971 c609719bSwdenk (TEAC FD-05PUB). 972 4d13cbadSwdenk MPC5200 USB requires additional defines: 973 4d13cbadSwdenk CONFIG_USB_CLOCK 974 4d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 975 307ecb6dSEric Millbrandt CONFIG_PSC3_USB 976 307ecb6dSEric Millbrandt for USB on PSC3 977 4d13cbadSwdenk CONFIG_USB_CONFIG 978 4d13cbadSwdenk for differential drivers: 0x00001000 979 4d13cbadSwdenk for single ended drivers: 0x00005000 980 307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 981 307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 982 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 983 fdcfaa1bSZhang Wei May be defined to allow interrupt polling 984 fdcfaa1bSZhang Wei instead of using asynchronous interrupts 985 4d13cbadSwdenk 986 16c8d5e7SWolfgang Denk- USB Device: 987 16c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 988 16c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 989 16c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 990 11ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 991 16c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 992 16c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 993 16c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 994 16c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 995 16c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 996 16c8d5e7SWolfgang Denk a Linux host by 997 16c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 998 16c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 999 16c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 1000 16c8d5e7SWolfgang Denk might be defined in YourBoardName.h 1001 16c8d5e7SWolfgang Denk 1002 16c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 1003 16c8d5e7SWolfgang Denk Define this to build a UDC device 1004 16c8d5e7SWolfgang Denk 1005 16c8d5e7SWolfgang Denk CONFIG_USB_TTY 1006 16c8d5e7SWolfgang Denk Define this to have a tty type of device available to 1007 16c8d5e7SWolfgang Denk talk to the UDC device 1008 16c8d5e7SWolfgang Denk 1009 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 1010 16c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 1011 16c8d5e7SWolfgang Denk be set to usbtty. 1012 16c8d5e7SWolfgang Denk 1013 16c8d5e7SWolfgang Denk mpc8xx: 1014 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 1015 16c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 1016 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 1017 16c8d5e7SWolfgang Denk 1018 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 1019 16c8d5e7SWolfgang Denk Derive USB clock from brgclk 1020 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 1021 16c8d5e7SWolfgang Denk 1022 16c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 1023 16c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 1024 16c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 1025 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 1026 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 1027 16c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 1028 16c8d5e7SWolfgang Denk 1029 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 1030 16c8d5e7SWolfgang Denk Define this string as the name of your company for 1031 16c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 1032 16c8d5e7SWolfgang Denk 1033 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 1034 16c8d5e7SWolfgang Denk Define this string as the name of your product 1035 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 1036 16c8d5e7SWolfgang Denk 1037 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 1038 16c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 1039 16c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 1040 16c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 1041 16c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 1042 16c8d5e7SWolfgang Denk 1043 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 1044 16c8d5e7SWolfgang Denk Define this as the unique Product ID 1045 16c8d5e7SWolfgang Denk for your device 1046 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1047 c609719bSwdenk 1048 c609719bSwdenk 1049 c609719bSwdenk- MMC Support: 1050 c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1051 c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1052 c609719bSwdenk accessed from the boot prompt by mapping the device 1053 c609719bSwdenk to physical memory similar to flash. Command line is 1054 602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1055 602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1056 c609719bSwdenk 1057 6705d81eSwdenk- Journaling Flash filesystem support: 1058 6705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 1059 6705d81eSwdenk CONFIG_JFFS2_NAND_DEV 1060 6705d81eSwdenk Define these for a default partition on a NAND device 1061 6705d81eSwdenk 1062 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 1063 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 1064 6705d81eSwdenk Define these for a default partition on a NOR device 1065 6705d81eSwdenk 1066 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 1067 6705d81eSwdenk Define this to create an own partition. You have to provide a 1068 6705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 1069 6705d81eSwdenk 1070 6705d81eSwdenk If you define only one JFFS2 partition you may also want to 1071 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 1072 6705d81eSwdenk to disable the command chpart. This is the default when you 1073 6705d81eSwdenk have not defined a custom partition 1074 6705d81eSwdenk 1075 c609719bSwdenk- Keyboard Support: 1076 c609719bSwdenk CONFIG_ISA_KEYBOARD 1077 c609719bSwdenk 1078 c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1079 c609719bSwdenk support 1080 c609719bSwdenk 1081 c609719bSwdenk CONFIG_I8042_KBD 1082 c609719bSwdenk Standard PC keyboard driver with US (is default) and 1083 c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1084 c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1085 c609719bSwdenk for cfb_console. Supports cursor blinking. 1086 c609719bSwdenk 1087 c609719bSwdenk- Video support: 1088 c609719bSwdenk CONFIG_VIDEO 1089 c609719bSwdenk 1090 c609719bSwdenk Define this to enable video support (for output to 1091 c609719bSwdenk video). 1092 c609719bSwdenk 1093 c609719bSwdenk CONFIG_VIDEO_CT69000 1094 c609719bSwdenk 1095 c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1096 c609719bSwdenk 1097 c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1098 eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1099 eeb1b77bSwdenk video output is selected via environment 'videoout' 1100 eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1101 eeb1b77bSwdenk assumed. 1102 c609719bSwdenk 1103 eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 1104 11ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1105 eeb1b77bSwdenk are possible: 1106 eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1107 eeb1b77bSwdenk Following standard modes are supported (* is default): 1108 eeb1b77bSwdenk 1109 eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1110 eeb1b77bSwdenk -------------+--------------------------------------------- 1111 eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1112 eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1113 eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1114 eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1115 eeb1b77bSwdenk -------------+--------------------------------------------- 1116 c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1117 c609719bSwdenk 1118 eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 1119 7817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1120 eeb1b77bSwdenk 1121 eeb1b77bSwdenk 1122 a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1123 a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1124 a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1125 a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1126 a6c7ad2fSwdenk 1127 7d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 1128 7d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 1129 7d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 1130 7d3053fbSTimur Tabi support, and should also define these other macros: 1131 7d3053fbSTimur Tabi 1132 7d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 1133 7d3053fbSTimur Tabi CONFIG_VIDEO 1134 7d3053fbSTimur Tabi CONFIG_CMD_BMP 1135 7d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 1136 7d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 1137 7d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 1138 7d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 1139 7d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 1140 7d3053fbSTimur Tabi 1141 ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1142 ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1143 ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1144 ba8e76bdSTimur Tabi description of this variable. 1145 7d3053fbSTimur Tabi 1146 682011ffSwdenk- Keyboard Support: 1147 682011ffSwdenk CONFIG_KEYBOARD 1148 682011ffSwdenk 1149 682011ffSwdenk Define this to enable a custom keyboard support. 1150 682011ffSwdenk This simply calls drv_keyboard_init() which must be 1151 682011ffSwdenk defined in your board-specific files. 1152 682011ffSwdenk The only board using this so far is RBC823. 1153 a6c7ad2fSwdenk 1154 c609719bSwdenk- LCD Support: CONFIG_LCD 1155 c609719bSwdenk 1156 c609719bSwdenk Define this to enable LCD support (for output to LCD 1157 c609719bSwdenk display); also select one of the supported displays 1158 c609719bSwdenk by defining one of these: 1159 c609719bSwdenk 1160 39cf4804SStelian Pop CONFIG_ATMEL_LCD: 1161 39cf4804SStelian Pop 1162 39cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 1163 39cf4804SStelian Pop 1164 fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1165 c609719bSwdenk 1166 fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1167 c609719bSwdenk 1168 fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1169 c609719bSwdenk 1170 fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1171 fd3103bbSwdenk Active, color, single scan. 1172 fd3103bbSwdenk 1173 fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1174 fd3103bbSwdenk 1175 fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1176 c609719bSwdenk Active, color, single scan. 1177 c609719bSwdenk 1178 c609719bSwdenk CONFIG_SHARP_16x9 1179 c609719bSwdenk 1180 c609719bSwdenk Sharp 320x240. Active, color, single scan. 1181 c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1182 c609719bSwdenk 1183 c609719bSwdenk CONFIG_SHARP_LQ64D341 1184 c609719bSwdenk 1185 c609719bSwdenk Sharp LQ64D341 display, 640x480. 1186 c609719bSwdenk Active, color, single scan. 1187 c609719bSwdenk 1188 c609719bSwdenk CONFIG_HLD1045 1189 c609719bSwdenk 1190 c609719bSwdenk HLD1045 display, 640x480. 1191 c609719bSwdenk Active, color, single scan. 1192 c609719bSwdenk 1193 c609719bSwdenk CONFIG_OPTREX_BW 1194 c609719bSwdenk 1195 c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1196 c609719bSwdenk or 1197 c609719bSwdenk Hitachi LMG6912RPFC-00T 1198 c609719bSwdenk or 1199 c609719bSwdenk Hitachi SP14Q002 1200 c609719bSwdenk 1201 c609719bSwdenk 320x240. Black & white. 1202 c609719bSwdenk 1203 c609719bSwdenk Normally display is black on white background; define 1204 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1205 c609719bSwdenk 1206 7152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1207 d791b1dcSwdenk 1208 d791b1dcSwdenk If this option is set, the environment is checked for 1209 d791b1dcSwdenk a variable "splashimage". If found, the usual display 1210 d791b1dcSwdenk of logo, copyright and system information on the LCD 1211 e94d2cd9Swdenk is suppressed and the BMP image at the address 1212 d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1213 d791b1dcSwdenk console is redirected to the "nulldev", too. This 1214 d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1215 d791b1dcSwdenk loaded very quickly after power-on. 1216 d791b1dcSwdenk 1217 1ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 1218 1ca298ceSMatthias Weisser 1219 1ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 1220 1ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 1221 1ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 1222 1ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 1223 1ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 1224 1ca298ceSMatthias Weisser specify 'm' for centering the image. 1225 1ca298ceSMatthias Weisser 1226 1ca298ceSMatthias Weisser Example: 1227 1ca298ceSMatthias Weisser setenv splashpos m,m 1228 1ca298ceSMatthias Weisser => image at center of screen 1229 1ca298ceSMatthias Weisser 1230 1ca298ceSMatthias Weisser setenv splashpos 30,20 1231 1ca298ceSMatthias Weisser => image at x = 30 and y = 20 1232 1ca298ceSMatthias Weisser 1233 1ca298ceSMatthias Weisser setenv splashpos -10,m 1234 1ca298ceSMatthias Weisser => vertically centered image 1235 1ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 1236 1ca298ceSMatthias Weisser 1237 98f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 1238 98f4a3dfSStefan Roese 1239 98f4a3dfSStefan Roese If this option is set, additionally to standard BMP 1240 98f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 1241 98f4a3dfSStefan Roese splashscreen support or the bmp command. 1242 98f4a3dfSStefan Roese 1243 d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1244 d5011762SAnatolij Gustschin 1245 d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1246 d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1247 d5011762SAnatolij Gustschin bmp command. 1248 d5011762SAnatolij Gustschin 1249 c29fdfc1Swdenk- Compression support: 1250 c29fdfc1Swdenk CONFIG_BZIP2 1251 c29fdfc1Swdenk 1252 c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1253 c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1254 c29fdfc1Swdenk compressed images are supported. 1255 c29fdfc1Swdenk 1256 c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1257 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1258 c29fdfc1Swdenk be at least 4MB. 1259 d791b1dcSwdenk 1260 fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1261 fc9c1727SLuigi 'Comio' Mantellini 1262 fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1263 fc9c1727SLuigi 'Comio' Mantellini images is included. 1264 fc9c1727SLuigi 'Comio' Mantellini 1265 fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1266 fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1267 fc9c1727SLuigi 'Comio' Mantellini formula: 1268 fc9c1727SLuigi 'Comio' Mantellini 1269 fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1270 fc9c1727SLuigi 'Comio' Mantellini 1271 fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1272 fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1273 fc9c1727SLuigi 'Comio' Mantellini 1274 fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1275 fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1276 fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1277 fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1278 fc9c1727SLuigi 'Comio' Mantellini 1279 fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1280 fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 1281 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1282 fc9c1727SLuigi 'Comio' Mantellini 1283 17ea1177Swdenk- MII/PHY support: 1284 17ea1177Swdenk CONFIG_PHY_ADDR 1285 17ea1177Swdenk 1286 17ea1177Swdenk The address of PHY on MII bus. 1287 17ea1177Swdenk 1288 17ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 1289 17ea1177Swdenk 1290 17ea1177Swdenk The clock frequency of the MII bus 1291 17ea1177Swdenk 1292 17ea1177Swdenk CONFIG_PHY_GIGE 1293 17ea1177Swdenk 1294 17ea1177Swdenk If this option is set, support for speed/duplex 1295 11ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 1296 17ea1177Swdenk 1297 17ea1177Swdenk CONFIG_PHY_RESET_DELAY 1298 17ea1177Swdenk 1299 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1300 17ea1177Swdenk reset before any MII register access is possible. 1301 17ea1177Swdenk For such PHY, set this option to the usec delay 1302 17ea1177Swdenk required. (minimum 300usec for LXT971A) 1303 17ea1177Swdenk 1304 17ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 1305 17ea1177Swdenk 1306 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1307 17ea1177Swdenk command issued before MII status register can be read 1308 17ea1177Swdenk 1309 c609719bSwdenk- Ethernet address: 1310 c609719bSwdenk CONFIG_ETHADDR 1311 c68a05feSrichardretanubun CONFIG_ETH1ADDR 1312 c609719bSwdenk CONFIG_ETH2ADDR 1313 c609719bSwdenk CONFIG_ETH3ADDR 1314 c68a05feSrichardretanubun CONFIG_ETH4ADDR 1315 c68a05feSrichardretanubun CONFIG_ETH5ADDR 1316 c609719bSwdenk 1317 11ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 1318 11ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1319 c609719bSwdenk is not determined automatically. 1320 c609719bSwdenk 1321 c609719bSwdenk- IP address: 1322 c609719bSwdenk CONFIG_IPADDR 1323 c609719bSwdenk 1324 c609719bSwdenk Define a default value for the IP address to use for 1325 11ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1326 c609719bSwdenk determined through e.g. bootp. 1327 c609719bSwdenk 1328 c609719bSwdenk- Server IP address: 1329 c609719bSwdenk CONFIG_SERVERIP 1330 c609719bSwdenk 1331 c609719bSwdenk Defines a default value for the IP address of a TFTP 1332 c609719bSwdenk server to contact when using the "tftboot" command. 1333 c609719bSwdenk 1334 97cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 1335 97cfe861SRobin Getz 1336 97cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 1337 97cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 1338 97cfe861SRobin Getz 1339 53a5c424SDavid Updegraff- Multicast TFTP Mode: 1340 53a5c424SDavid Updegraff CONFIG_MCAST_TFTP 1341 53a5c424SDavid Updegraff 1342 53a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 1343 53a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 1344 11ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 1345 53a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 1346 53a5c424SDavid Updegraff multicast group. 1347 53a5c424SDavid Updegraff 1348 c609719bSwdenk- BOOTP Recovery Mode: 1349 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1350 c609719bSwdenk 1351 c609719bSwdenk If you have many targets in a network that try to 1352 c609719bSwdenk boot using BOOTP, you may want to avoid that all 1353 c609719bSwdenk systems send out BOOTP requests at precisely the same 1354 c609719bSwdenk moment (which would happen for instance at recovery 1355 c609719bSwdenk from a power failure, when all systems will try to 1356 c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1357 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1358 c609719bSwdenk inserted before sending out BOOTP requests. The 1359 6c33c785SWolfgang Denk following delays are inserted then: 1360 c609719bSwdenk 1361 c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1362 c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1363 c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1364 c609719bSwdenk 4th and following 1365 c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1366 c609719bSwdenk 1367 fe389a82Sstroese- DHCP Advanced Options: 1368 1fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 1369 1fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1370 fe389a82Sstroese 1371 1fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 1372 1fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 1373 1fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 1374 1fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 1375 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 1376 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 1377 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS 1378 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 1379 1fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 1380 1fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 1381 1fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 1382 1fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1383 fe389a82Sstroese 1384 5d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 1385 5d110f0aSWilson Callan environment variable, not the BOOTP server. 1386 fe389a82Sstroese 1387 fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1388 fe389a82Sstroese serverip from a DHCP server, it is possible that more 1389 fe389a82Sstroese than one DNS serverip is offered to the client. 1390 fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1391 fe389a82Sstroese serverip will be stored in the additional environment 1392 fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1393 fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 1394 1fe80d79SJon Loeliger is defined. 1395 fe389a82Sstroese 1396 fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1397 fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1398 fe389a82Sstroese need the hostname of the DHCP requester. 1399 5d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 1400 1fe80d79SJon Loeliger of the "hostname" environment variable is passed as 1401 1fe80d79SJon Loeliger option 12 to the DHCP server. 1402 fe389a82Sstroese 1403 d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1404 d9a2f416SAras Vaichas 1405 d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1406 d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1407 d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1408 d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1409 d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1410 d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1411 d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1412 d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1413 d9a2f416SAras Vaichas that one of the retries will be successful but note that 1414 d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1415 d9a2f416SAras Vaichas this delay. 1416 d9a2f416SAras Vaichas 1417 a3d991bdSwdenk - CDP Options: 1418 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1419 a3d991bdSwdenk 1420 a3d991bdSwdenk The device id used in CDP trigger frames. 1421 a3d991bdSwdenk 1422 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1423 a3d991bdSwdenk 1424 a3d991bdSwdenk A two character string which is prefixed to the MAC address 1425 a3d991bdSwdenk of the device. 1426 a3d991bdSwdenk 1427 a3d991bdSwdenk CONFIG_CDP_PORT_ID 1428 a3d991bdSwdenk 1429 a3d991bdSwdenk A printf format string which contains the ascii name of 1430 a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1431 11ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1432 a3d991bdSwdenk 1433 a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1434 a3d991bdSwdenk 1435 a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1436 a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1437 a3d991bdSwdenk 1438 a3d991bdSwdenk CONFIG_CDP_VERSION 1439 a3d991bdSwdenk 1440 a3d991bdSwdenk An ascii string containing the version of the software. 1441 a3d991bdSwdenk 1442 a3d991bdSwdenk CONFIG_CDP_PLATFORM 1443 a3d991bdSwdenk 1444 a3d991bdSwdenk An ascii string containing the name of the platform. 1445 a3d991bdSwdenk 1446 a3d991bdSwdenk CONFIG_CDP_TRIGGER 1447 a3d991bdSwdenk 1448 a3d991bdSwdenk A 32bit integer sent on the trigger. 1449 a3d991bdSwdenk 1450 a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1451 a3d991bdSwdenk 1452 a3d991bdSwdenk A 16bit integer containing the power consumption of the 1453 a3d991bdSwdenk device in .1 of milliwatts. 1454 a3d991bdSwdenk 1455 a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1456 a3d991bdSwdenk 1457 a3d991bdSwdenk A byte containing the id of the VLAN. 1458 a3d991bdSwdenk 1459 c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1460 c609719bSwdenk 1461 c609719bSwdenk Several configurations allow to display the current 1462 c609719bSwdenk status using a LED. For instance, the LED will blink 1463 c609719bSwdenk fast while running U-Boot code, stop blinking as 1464 c609719bSwdenk soon as a reply to a BOOTP request was received, and 1465 c609719bSwdenk start blinking slow once the Linux kernel is running 1466 c609719bSwdenk (supported by a status LED driver in the Linux 1467 c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1468 c609719bSwdenk feature in U-Boot. 1469 c609719bSwdenk 1470 c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1471 c609719bSwdenk 1472 c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1473 c609719bSwdenk on those systems that support this (optional) 1474 c609719bSwdenk feature, like the TQM8xxL modules. 1475 c609719bSwdenk 1476 c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1477 c609719bSwdenk 1478 b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1479 b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1480 11ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1481 c609719bSwdenk 1482 b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1483 602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1484 b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1485 b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1486 c609719bSwdenk command line interface. 1487 c609719bSwdenk 1488 bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1489 c609719bSwdenk 1490 b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1491 b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1492 b37c7e5eSwdenk support for I2C. 1493 c609719bSwdenk 1494 b37c7e5eSwdenk There are several other quantities that must also be 1495 b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1496 c609719bSwdenk 1497 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1498 b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1499 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 1500 11ccc33fSMarcel Ziswiler the CPU's i2c node address). 1501 c609719bSwdenk 1502 8d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1503 a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 1504 8d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 1505 8d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 1506 8d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1507 b37c7e5eSwdenk 1508 5da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 1509 5da71efaSEric Millbrandt 1510 5da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 1511 5da71efaSEric Millbrandt chips might think that the current transfer is still 1512 5da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 1513 5da71efaSEric Millbrandt commands until the slave device responds. 1514 5da71efaSEric Millbrandt 1515 b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1516 b37c7e5eSwdenk 1517 b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1518 b37c7e5eSwdenk then the following macros need to be defined (examples are 1519 b37c7e5eSwdenk from include/configs/lwmon.h): 1520 c609719bSwdenk 1521 c609719bSwdenk I2C_INIT 1522 c609719bSwdenk 1523 b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1524 c609719bSwdenk controller or configure ports. 1525 c609719bSwdenk 1526 b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1527 b37c7e5eSwdenk 1528 c609719bSwdenk I2C_PORT 1529 c609719bSwdenk 1530 c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1531 c609719bSwdenk assumes both bits are on the same port). Valid values 1532 c609719bSwdenk are 0..3 for ports A..D. 1533 c609719bSwdenk 1534 c609719bSwdenk I2C_ACTIVE 1535 c609719bSwdenk 1536 c609719bSwdenk The code necessary to make the I2C data line active 1537 c609719bSwdenk (driven). If the data line is open collector, this 1538 c609719bSwdenk define can be null. 1539 c609719bSwdenk 1540 b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1541 b37c7e5eSwdenk 1542 c609719bSwdenk I2C_TRISTATE 1543 c609719bSwdenk 1544 c609719bSwdenk The code necessary to make the I2C data line tri-stated 1545 c609719bSwdenk (inactive). If the data line is open collector, this 1546 c609719bSwdenk define can be null. 1547 c609719bSwdenk 1548 b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1549 b37c7e5eSwdenk 1550 c609719bSwdenk I2C_READ 1551 c609719bSwdenk 1552 c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1553 c609719bSwdenk FALSE if it is low. 1554 c609719bSwdenk 1555 b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1556 b37c7e5eSwdenk 1557 c609719bSwdenk I2C_SDA(bit) 1558 c609719bSwdenk 1559 c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1560 c609719bSwdenk is FALSE, it clears it (low). 1561 c609719bSwdenk 1562 b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1563 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1564 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1565 b37c7e5eSwdenk 1566 c609719bSwdenk I2C_SCL(bit) 1567 c609719bSwdenk 1568 c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1569 c609719bSwdenk is FALSE, it clears it (low). 1570 c609719bSwdenk 1571 b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1572 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1573 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1574 b37c7e5eSwdenk 1575 c609719bSwdenk I2C_DELAY 1576 c609719bSwdenk 1577 c609719bSwdenk This delay is invoked four times per clock cycle so this 1578 c609719bSwdenk controls the rate of data transfer. The data rate thus 1579 b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1580 b37c7e5eSwdenk like: 1581 b37c7e5eSwdenk 1582 b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1583 c609719bSwdenk 1584 793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1585 793b5726SMike Frysinger 1586 793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1587 793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1588 793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1589 793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1590 793b5726SMike Frysinger 1591 793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1592 793b5726SMike Frysinger the generic GPIO functions. 1593 793b5726SMike Frysinger 1594 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 1595 47cd00faSwdenk 1596 47cd00faSwdenk When a board is reset during an i2c bus transfer 1597 47cd00faSwdenk chips might think that the current transfer is still 1598 47cd00faSwdenk in progress. On some boards it is possible to access 1599 47cd00faSwdenk the i2c SCLK line directly, either by using the 1600 47cd00faSwdenk processor pin as a GPIO or by having a second pin 1601 47cd00faSwdenk connected to the bus. If this option is defined a 1602 47cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 1603 47cd00faSwdenk is run early in the boot sequence. 1604 47cd00faSwdenk 1605 26a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 1606 26a33504SRichard Retanubun 1607 26a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 1608 26a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 1609 26a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 1610 26a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 1611 26a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 1612 26a33504SRichard Retanubun controller provide such a method. It is called at the end of 1613 26a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 1614 26a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 1615 26a33504SRichard Retanubun 1616 17ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 1617 17ea1177Swdenk 1618 17ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 1619 17ea1177Swdenk in u-boot bd_info structure based on u-boot environment 1620 17ea1177Swdenk variable "i2cfast". (see also i2cfast) 1621 17ea1177Swdenk 1622 bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1623 bb99ad6dSBen Warren 1624 bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1625 bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1626 bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1627 bb99ad6dSBen Warren Note that bus numbering is zero-based. 1628 bb99ad6dSBen Warren 1629 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1630 bb99ad6dSBen Warren 1631 bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1632 0f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 1633 0f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 1634 0f89c54bSPeter Tyser a 1D array of device addresses 1635 bb99ad6dSBen Warren 1636 bb99ad6dSBen Warren e.g. 1637 bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1638 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1639 bb99ad6dSBen Warren 1640 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1641 bb99ad6dSBen Warren 1642 bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1643 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1644 bb99ad6dSBen Warren 1645 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1646 bb99ad6dSBen Warren 1647 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1648 be5e6181STimur Tabi 1649 be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1650 be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1651 be5e6181STimur Tabi 1652 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 1653 0dc018ecSStefan Roese 1654 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 1655 0dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 1656 0dc018ecSStefan Roese 1657 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 1658 0dc018ecSStefan Roese 1659 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 1660 0dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 1661 0dc018ecSStefan Roese 1662 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 1663 9ebbb54fSVictor Gallardo 1664 9ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 1665 9ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 1666 9ebbb54fSVictor Gallardo specified DTT device. 1667 9ebbb54fSVictor Gallardo 1668 be5e6181STimur Tabi CONFIG_FSL_I2C 1669 be5e6181STimur Tabi 1670 be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 1671 7817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1672 be5e6181STimur Tabi 1673 67b23a32SHeiko Schocher CONFIG_I2C_MUX 1674 67b23a32SHeiko Schocher 1675 67b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 1676 67b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 1677 67b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 1678 67b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 1679 67b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 1680 67b23a32SHeiko Schocher the muxes to activate this new "bus". 1681 67b23a32SHeiko Schocher 1682 67b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 1683 67b23a32SHeiko Schocher feature! 1684 67b23a32SHeiko Schocher 1685 67b23a32SHeiko Schocher Example: 1686 67b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 1687 67b23a32SHeiko Schocher The First mux with address 70 and channel 6 1688 67b23a32SHeiko Schocher The Second mux with address 71 and channel 4 1689 67b23a32SHeiko Schocher 1690 67b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 1691 67b23a32SHeiko Schocher 1692 67b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 1693 67b23a32SHeiko Schocher of I2C Busses with muxes: 1694 67b23a32SHeiko Schocher 1695 67b23a32SHeiko Schocher => i2c bus 1696 67b23a32SHeiko Schocher Busses reached over muxes: 1697 67b23a32SHeiko Schocher Bus ID: 2 1698 67b23a32SHeiko Schocher reached over Mux(es): 1699 67b23a32SHeiko Schocher pca9544a@70 ch: 4 1700 67b23a32SHeiko Schocher Bus ID: 3 1701 67b23a32SHeiko Schocher reached over Mux(es): 1702 67b23a32SHeiko Schocher pca9544a@70 ch: 6 1703 67b23a32SHeiko Schocher pca9544a@71 ch: 4 1704 67b23a32SHeiko Schocher => 1705 67b23a32SHeiko Schocher 1706 67b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1707 67b23a32SHeiko Schocher u-boot sends First the Commando to the mux@70 to enable 1708 67b23a32SHeiko Schocher channel 6, and then the Commando to the mux@71 to enable 1709 67b23a32SHeiko Schocher the channel 4. 1710 67b23a32SHeiko Schocher 1711 67b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1712 67b23a32SHeiko Schocher usual, to communicate with your I2C devices behind 1713 67b23a32SHeiko Schocher the 2 muxes. 1714 67b23a32SHeiko Schocher 1715 67b23a32SHeiko Schocher This option is actually implemented for the bitbanging 1716 67b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 1717 67b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 1718 67b23a32SHeiko Schocher to add this option to other architectures. 1719 67b23a32SHeiko Schocher 1720 2ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 1721 2ac6985aSAndrew Dyer 1722 2ac6985aSAndrew Dyer defining this will force the i2c_read() function in 1723 2ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 1724 2ac6985aSAndrew Dyer between writing the address pointer and reading the 1725 2ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 1726 2ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 1727 2ac6985aSAndrew Dyer devices can use either method, but some require one or 1728 2ac6985aSAndrew Dyer the other. 1729 be5e6181STimur Tabi 1730 c609719bSwdenk- SPI Support: CONFIG_SPI 1731 c609719bSwdenk 1732 c609719bSwdenk Enables SPI driver (so far only tested with 1733 c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1734 c609719bSwdenk D/As on the SACSng board) 1735 c609719bSwdenk 1736 6639562eSYoshihiro Shimoda CONFIG_SH_SPI 1737 6639562eSYoshihiro Shimoda 1738 6639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 1739 6639562eSYoshihiro Shimoda only SH7757 is supported. 1740 6639562eSYoshihiro Shimoda 1741 c609719bSwdenk CONFIG_SPI_X 1742 c609719bSwdenk 1743 c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1744 c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1745 c609719bSwdenk 1746 c609719bSwdenk CONFIG_SOFT_SPI 1747 c609719bSwdenk 1748 c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1749 c609719bSwdenk using hardware support. This is a general purpose 1750 c609719bSwdenk driver that only requires three general I/O port pins 1751 c609719bSwdenk (two outputs, one input) to function. If this is 1752 c609719bSwdenk defined, the board configuration must define several 1753 c609719bSwdenk SPI configuration items (port pins to use, etc). For 1754 c609719bSwdenk an example, see include/configs/sacsng.h. 1755 c609719bSwdenk 1756 04a9e118SBen Warren CONFIG_HARD_SPI 1757 04a9e118SBen Warren 1758 04a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 1759 04a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 1760 04a9e118SBen Warren must define a list of chip-select function pointers. 1761 04a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 1762 04a9e118SBen Warren example, see include/configs/mpc8349emds.h. 1763 04a9e118SBen Warren 1764 38254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 1765 38254f45SGuennadi Liakhovetski 1766 38254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 1767 38254f45SGuennadi Liakhovetski SoCs. Currently only i.MX31 is supported. 1768 38254f45SGuennadi Liakhovetski 1769 0133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 1770 0133502eSMatthias Fuchs 1771 0133502eSMatthias Fuchs Enables FPGA subsystem. 1772 0133502eSMatthias Fuchs 1773 0133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 1774 0133502eSMatthias Fuchs 1775 0133502eSMatthias Fuchs Enables support for specific chip vendors. 1776 0133502eSMatthias Fuchs (ALTERA, XILINX) 1777 0133502eSMatthias Fuchs 1778 0133502eSMatthias Fuchs CONFIG_FPGA_<family> 1779 0133502eSMatthias Fuchs 1780 0133502eSMatthias Fuchs Enables support for FPGA family. 1781 0133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 1782 0133502eSMatthias Fuchs 1783 0133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1784 c609719bSwdenk 1785 c609719bSwdenk Specify the number of FPGA devices to support. 1786 c609719bSwdenk 1787 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1788 c609719bSwdenk 1789 c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1790 c609719bSwdenk 1791 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1792 c609719bSwdenk 1793 c609719bSwdenk Enable checks on FPGA configuration interface busy 1794 c609719bSwdenk status by the configuration function. This option 1795 c609719bSwdenk will require a board or device specific function to 1796 c609719bSwdenk be written. 1797 c609719bSwdenk 1798 c609719bSwdenk CONFIG_FPGA_DELAY 1799 c609719bSwdenk 1800 c609719bSwdenk If defined, a function that provides delays in the FPGA 1801 c609719bSwdenk configuration driver. 1802 c609719bSwdenk 1803 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 1804 c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1805 c609719bSwdenk 1806 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 1807 c609719bSwdenk 1808 c609719bSwdenk Check for configuration errors during FPGA bitfile 1809 c609719bSwdenk loading. For example, abort during Virtex II 1810 c609719bSwdenk configuration if the INIT_B line goes low (which 1811 c609719bSwdenk indicated a CRC error). 1812 c609719bSwdenk 1813 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 1814 c609719bSwdenk 1815 c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1816 c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1817 c609719bSwdenk FPGA configuration sequence. The default time is 500 1818 11ccc33fSMarcel Ziswiler ms. 1819 c609719bSwdenk 1820 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 1821 c609719bSwdenk 1822 c609719bSwdenk Maximum time to wait for BUSY to deassert during 1823 11ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 1824 c609719bSwdenk 1825 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 1826 c609719bSwdenk 1827 c609719bSwdenk Time to wait after FPGA configuration. The default is 1828 11ccc33fSMarcel Ziswiler 200 ms. 1829 c609719bSwdenk 1830 c609719bSwdenk- Configuration Management: 1831 c609719bSwdenk CONFIG_IDENT_STRING 1832 c609719bSwdenk 1833 c609719bSwdenk If defined, this string will be added to the U-Boot 1834 c609719bSwdenk version information (U_BOOT_VERSION) 1835 c609719bSwdenk 1836 c609719bSwdenk- Vendor Parameter Protection: 1837 c609719bSwdenk 1838 c609719bSwdenk U-Boot considers the values of the environment 1839 c609719bSwdenk variables "serial#" (Board Serial Number) and 1840 7152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1841 c609719bSwdenk are set once by the board vendor / manufacturer, and 1842 c609719bSwdenk protects these variables from casual modification by 1843 c609719bSwdenk the user. Once set, these variables are read-only, 1844 c609719bSwdenk and write or delete attempts are rejected. You can 1845 11ccc33fSMarcel Ziswiler change this behaviour: 1846 c609719bSwdenk 1847 c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1848 c609719bSwdenk file, the write protection for vendor parameters is 1849 47cd00faSwdenk completely disabled. Anybody can change or delete 1850 c609719bSwdenk these parameters. 1851 c609719bSwdenk 1852 c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1853 c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 1854 11ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 1855 c609719bSwdenk which can be changed exactly ONCE by the user. [The 1856 c609719bSwdenk serial# is unaffected by this, i. e. it remains 1857 c609719bSwdenk read-only.] 1858 c609719bSwdenk 1859 c609719bSwdenk- Protected RAM: 1860 c609719bSwdenk CONFIG_PRAM 1861 c609719bSwdenk 1862 c609719bSwdenk Define this variable to enable the reservation of 1863 c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1864 c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1865 c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1866 c609719bSwdenk this default value by defining an environment 1867 c609719bSwdenk variable "pram" to the number of kB you want to 1868 c609719bSwdenk reserve. Note that the board info structure will 1869 c609719bSwdenk still show the full amount of RAM. If pRAM is 1870 c609719bSwdenk reserved, a new environment variable "mem" will 1871 c609719bSwdenk automatically be defined to hold the amount of 1872 c609719bSwdenk remaining RAM in a form that can be passed as boot 1873 c609719bSwdenk argument to Linux, for instance like that: 1874 c609719bSwdenk 1875 fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1876 c609719bSwdenk saveenv 1877 c609719bSwdenk 1878 c609719bSwdenk This way you can tell Linux not to use this memory, 1879 c609719bSwdenk either, which results in a memory region that will 1880 c609719bSwdenk not be affected by reboots. 1881 c609719bSwdenk 1882 c609719bSwdenk *WARNING* If your board configuration uses automatic 1883 c609719bSwdenk detection of the RAM size, you must make sure that 1884 c609719bSwdenk this memory test is non-destructive. So far, the 1885 c609719bSwdenk following board configurations are known to be 1886 c609719bSwdenk "pRAM-clean": 1887 c609719bSwdenk 1888 c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1889 c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1890 544d97e9SWolfgang Denk FLAGADM, TQM8260 1891 c609719bSwdenk 1892 c609719bSwdenk- Error Recovery: 1893 c609719bSwdenk CONFIG_PANIC_HANG 1894 c609719bSwdenk 1895 c609719bSwdenk Define this variable to stop the system in case of a 1896 c609719bSwdenk fatal error, so that you have to reset it manually. 1897 c609719bSwdenk This is probably NOT a good idea for an embedded 1898 11ccc33fSMarcel Ziswiler system where you want the system to reboot 1899 c609719bSwdenk automatically as fast as possible, but it may be 1900 c609719bSwdenk useful during development since you can try to debug 1901 c609719bSwdenk the conditions that lead to the situation. 1902 c609719bSwdenk 1903 c609719bSwdenk CONFIG_NET_RETRY_COUNT 1904 c609719bSwdenk 1905 c609719bSwdenk This variable defines the number of retries for 1906 c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1907 c609719bSwdenk before giving up the operation. If not defined, a 1908 c609719bSwdenk default value of 5 is used. 1909 c609719bSwdenk 1910 40cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 1911 40cb90eeSGuennadi Liakhovetski 1912 40cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 1913 40cb90eeSGuennadi Liakhovetski 1914 c609719bSwdenk- Command Interpreter: 1915 8078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 1916 04a85b3bSwdenk 1917 04a85b3bSwdenk Enable auto completion of commands using TAB. 1918 04a85b3bSwdenk 1919 8078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 1920 8078f1a5SWolfgang Denk for the "hush" shell. 1921 8078f1a5SWolfgang Denk 1922 8078f1a5SWolfgang Denk 1923 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 1924 c609719bSwdenk 1925 c609719bSwdenk Define this variable to enable the "hush" shell (from 1926 c609719bSwdenk Busybox) as command line interpreter, thus enabling 1927 c609719bSwdenk powerful command line syntax like 1928 c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 1929 c609719bSwdenk constructs ("shell scripts"). 1930 c609719bSwdenk 1931 c609719bSwdenk If undefined, you get the old, much simpler behaviour 1932 c609719bSwdenk with a somewhat smaller memory footprint. 1933 c609719bSwdenk 1934 c609719bSwdenk 1935 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 1936 c609719bSwdenk 1937 c609719bSwdenk This defines the secondary prompt string, which is 1938 c609719bSwdenk printed when the command interpreter needs more input 1939 c609719bSwdenk to complete a command. Usually "> ". 1940 c609719bSwdenk 1941 c609719bSwdenk Note: 1942 c609719bSwdenk 1943 c609719bSwdenk In the current implementation, the local variables 1944 c609719bSwdenk space and global environment variables space are 1945 c609719bSwdenk separated. Local variables are those you define by 1946 3b57fe0aSwdenk simply typing `name=value'. To access a local 1947 c609719bSwdenk variable later on, you have write `$name' or 1948 3b57fe0aSwdenk `${name}'; to execute the contents of a variable 1949 3b57fe0aSwdenk directly type `$name' at the command prompt. 1950 c609719bSwdenk 1951 c609719bSwdenk Global environment variables are those you use 1952 c609719bSwdenk setenv/printenv to work with. To run a command stored 1953 c609719bSwdenk in such a variable, you need to use the run command, 1954 c609719bSwdenk and you must not use the '$' sign to access them. 1955 c609719bSwdenk 1956 c609719bSwdenk To store commands and special characters in a 1957 c609719bSwdenk variable, please use double quotation marks 1958 c609719bSwdenk surrounding the whole text of the variable, instead 1959 c609719bSwdenk of the backslashes before semicolons and special 1960 c609719bSwdenk symbols. 1961 c609719bSwdenk 1962 aa0c71acSWolfgang Denk- Commandline Editing and History: 1963 aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 1964 aa0c71acSWolfgang Denk 1965 11ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 1966 aa0c71acSWolfgang Denk commandline input operations 1967 aa0c71acSWolfgang Denk 1968 a8c7c708Swdenk- Default Environment: 1969 c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 1970 c609719bSwdenk 1971 c609719bSwdenk Define this to contain any number of null terminated 1972 c609719bSwdenk strings (variable = value pairs) that will be part of 1973 7152b1d0Swdenk the default environment compiled into the boot image. 1974 2262cfeeSwdenk 1975 c609719bSwdenk For example, place something like this in your 1976 c609719bSwdenk board's config file: 1977 c609719bSwdenk 1978 c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 1979 c609719bSwdenk "myvar1=value1\0" \ 1980 c609719bSwdenk "myvar2=value2\0" 1981 c609719bSwdenk 1982 c609719bSwdenk Warning: This method is based on knowledge about the 1983 c609719bSwdenk internal format how the environment is stored by the 1984 2262cfeeSwdenk U-Boot code. This is NOT an official, exported 1985 c609719bSwdenk interface! Although it is unlikely that this format 1986 7152b1d0Swdenk will change soon, there is no guarantee either. 1987 c609719bSwdenk You better know what you are doing here. 1988 c609719bSwdenk 1989 c609719bSwdenk Note: overly (ab)use of the default environment is 1990 c609719bSwdenk discouraged. Make sure to check other ways to preset 1991 74de7aefSWolfgang Denk the environment like the "source" command or the 1992 c609719bSwdenk boot command first. 1993 c609719bSwdenk 1994 a8c7c708Swdenk- DataFlash Support: 1995 2abbe075Swdenk CONFIG_HAS_DATAFLASH 1996 2abbe075Swdenk 1997 2abbe075Swdenk Defining this option enables DataFlash features and 1998 2abbe075Swdenk allows to read/write in Dataflash via the standard 1999 2abbe075Swdenk commands cp, md... 2000 2abbe075Swdenk 2001 3f85ce27Swdenk- SystemACE Support: 2002 3f85ce27Swdenk CONFIG_SYSTEMACE 2003 3f85ce27Swdenk 2004 3f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 2005 3f85ce27Swdenk chips attached via some sort of local bus. The address 2006 11ccc33fSMarcel Ziswiler of the chip must also be defined in the 2007 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 2008 3f85ce27Swdenk 2009 3f85ce27Swdenk #define CONFIG_SYSTEMACE 2010 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 2011 3f85ce27Swdenk 2012 3f85ce27Swdenk When SystemACE support is added, the "ace" device type 2013 3f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 2014 3f85ce27Swdenk 2015 ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2016 ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2017 ecb0ccd9SWolfgang Denk 2018 28cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2019 ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 2020 28cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2021 ecb0ccd9SWolfgang Denk number generator is used. 2022 ecb0ccd9SWolfgang Denk 2023 28cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 2024 28cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 2025 28cb9375SWolfgang Denk defined, the normal port 69 is used. 2026 28cb9375SWolfgang Denk 2027 28cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2028 ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2029 ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2030 ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2031 ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2032 ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2033 ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2034 ecb0ccd9SWolfgang Denk 2035 a8c7c708Swdenk- Show boot progress: 2036 c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2037 c609719bSwdenk 2038 c609719bSwdenk Defining this option allows to add some board- 2039 c609719bSwdenk specific code (calling a user-provided function 2040 c609719bSwdenk "show_boot_progress(int)") that enables you to show 2041 c609719bSwdenk the system's boot progress on some display (for 2042 c609719bSwdenk example, some LED's) on your board. At the moment, 2043 c609719bSwdenk the following checkpoints are implemented: 2044 c609719bSwdenk 2045 8ae86b76SWolfgang Denk- Standalone program support: 2046 8ae86b76SWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 2047 8ae86b76SWolfgang Denk 2048 8ae86b76SWolfgang Denk This option allows to define board specific values 2049 8ae86b76SWolfgang Denk for the address where standalone program gets loaded, 2050 8ae86b76SWolfgang Denk thus overwriting the architecutre dependent default 2051 8ae86b76SWolfgang Denk settings. 2052 8ae86b76SWolfgang Denk 2053 d32a1a4cSMinkyu Kang- Frame Buffer Address: 2054 d32a1a4cSMinkyu Kang CONFIG_FB_ADDR 2055 d32a1a4cSMinkyu Kang 2056 d32a1a4cSMinkyu Kang Define CONFIG_FB_ADDR if you want to use specific address for 2057 d32a1a4cSMinkyu Kang frame buffer. 2058 d32a1a4cSMinkyu Kang Then system will reserve the frame buffer address to defined address 2059 d32a1a4cSMinkyu Kang instead of lcd_setmem (this function grab the memory for frame buffer 2060 d32a1a4cSMinkyu Kang by panel's size). 2061 d32a1a4cSMinkyu Kang 2062 d32a1a4cSMinkyu Kang Please see board_init_f function. 2063 d32a1a4cSMinkyu Kang 2064 d32a1a4cSMinkyu Kang If you want this config option then, 2065 d32a1a4cSMinkyu Kang please define it at your board config file 2066 d32a1a4cSMinkyu Kang 2067 1372cce2SMarian BalakowiczLegacy uImage format: 2068 1372cce2SMarian Balakowicz 2069 c609719bSwdenk Arg Where When 2070 c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2071 c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2072 c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2073 c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2074 c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2075 c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2076 c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2077 c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2078 c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 2079 1372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2080 c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2081 c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2082 c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2083 c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 2084 1372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2085 c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 2086 1372cce2SMarian Balakowicz 2087 1372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 2088 1372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 2089 1372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 2090 1372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 2091 1372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 2092 1372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 2093 1372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 2094 11ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 2095 1372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 2096 1372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 2097 1372cce2SMarian Balakowicz 2098 ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2099 c609719bSwdenk 2100 a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 2101 63e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 2102 63e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 2103 63e73c9aSwdenk 2104 566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2105 566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2106 566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2107 566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2108 566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2109 566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2110 566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2111 566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2112 566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2113 566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2114 566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2115 566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2116 566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2117 566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2118 566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2119 566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2120 566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2121 566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2122 566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2123 566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2124 566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2125 566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2126 566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2127 566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2128 566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2129 566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2130 566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2131 566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2132 566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2133 566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2134 566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2135 566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2136 566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2137 566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2138 566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2139 566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2140 566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2141 566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2142 566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2143 566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2144 566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2145 566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2146 566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2147 566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2148 566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2149 566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2150 566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2151 c609719bSwdenk 2152 566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2153 c609719bSwdenk 2154 566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2155 566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2156 566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2157 206c60cbSwdenk 2158 566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2159 566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 2160 11ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2161 566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2162 566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2163 566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 2164 74de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 2165 74de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2166 566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2167 c609719bSwdenk 2168 1372cce2SMarian BalakowiczFIT uImage format: 2169 1372cce2SMarian Balakowicz 2170 1372cce2SMarian Balakowicz Arg Where When 2171 1372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 2172 1372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 2173 1372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 2174 1372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 2175 1372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 2176 1372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2177 f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 2178 1372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 2179 1372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 2180 1372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 2181 1372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 2182 1372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 2183 11ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 2184 11ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 2185 1372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 2186 1372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 2187 1372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 2188 1372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 2189 1372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 2190 1372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 2191 1372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 2192 1372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 2193 1372cce2SMarian Balakowicz 2194 1372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 2195 1372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 2196 1372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 2197 11ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 2198 1372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 2199 1372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 2200 1372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 2201 1372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 2202 1372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 2203 1372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 2204 1372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 2205 1372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 2206 1372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 2207 1372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 2208 1372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 2209 1372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 2210 1372cce2SMarian Balakowicz 2211 11ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 2212 1372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 2213 1372cce2SMarian Balakowicz 2214 11ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 2215 1372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 2216 1372cce2SMarian Balakowicz 2217 11ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 2218 1372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 2219 1372cce2SMarian Balakowicz 2220 cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2221 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2222 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2223 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2224 cccfc2abSDetlev Zundel 2225 cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2226 cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2227 cccfc2abSDetlev Zundel 2228 cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2229 cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2230 cccfc2abSDetlev Zundel 2231 cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2232 cccfc2abSDetlev Zundel Needed for mtdparts command support. 2233 cccfc2abSDetlev Zundel 2234 cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2235 cccfc2abSDetlev Zundel 2236 cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2237 cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2238 cccfc2abSDetlev Zundel 2239 1372cce2SMarian Balakowicz 2240 c609719bSwdenkModem Support: 2241 c609719bSwdenk-------------- 2242 c609719bSwdenk 2243 566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2244 c609719bSwdenk 2245 11ccc33fSMarcel Ziswiler- Modem support enable: 2246 c609719bSwdenk CONFIG_MODEM_SUPPORT 2247 c609719bSwdenk 2248 c609719bSwdenk- RTS/CTS Flow control enable: 2249 c609719bSwdenk CONFIG_HWFLOW 2250 c609719bSwdenk 2251 c609719bSwdenk- Modem debug support: 2252 c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2253 c609719bSwdenk 2254 c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2255 c609719bSwdenk for modem support. Useful only with BDI2000. 2256 c609719bSwdenk 2257 a8c7c708Swdenk- Interrupt support (PPC): 2258 a8c7c708Swdenk 2259 a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2260 a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 2261 11ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2262 a8c7c708Swdenk should set decrementer_count to appropriate value. If 2263 11ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2264 a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 2265 11ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2266 a8c7c708Swdenk specific handling. If board has watchdog / status_led 2267 a8c7c708Swdenk / other_activity_monitor it works automatically from 2268 a8c7c708Swdenk general timer_interrupt(). 2269 a8c7c708Swdenk 2270 c609719bSwdenk- General: 2271 c609719bSwdenk 2272 c609719bSwdenk In the target system modem support is enabled when a 2273 c609719bSwdenk specific key (key combination) is pressed during 2274 c609719bSwdenk power-on. Otherwise U-Boot will boot normally 2275 11ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2276 c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2277 c609719bSwdenk function, returning 1 and thus enabling modem 2278 c609719bSwdenk initialization. 2279 c609719bSwdenk 2280 c609719bSwdenk If there are no modem init strings in the 2281 c609719bSwdenk environment, U-Boot proceed to autoboot; the 2282 c609719bSwdenk previous output (banner, info printfs) will be 2283 11ccc33fSMarcel Ziswiler suppressed, though. 2284 c609719bSwdenk 2285 c609719bSwdenk See also: doc/README.Modem 2286 c609719bSwdenk 2287 c609719bSwdenk 2288 c609719bSwdenkConfiguration Settings: 2289 c609719bSwdenk----------------------- 2290 c609719bSwdenk 2291 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2292 c609719bSwdenk undefine this when you're short of memory. 2293 c609719bSwdenk 2294 2fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 2295 2fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 2296 2fb2604dSPeter Tyser 2297 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2298 c609719bSwdenk prompt for user input. 2299 c609719bSwdenk 2300 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2301 c609719bSwdenk 2302 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2303 c609719bSwdenk 2304 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2305 c609719bSwdenk 2306 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2307 c609719bSwdenk the application (usually a Linux kernel) when it is 2308 c609719bSwdenk booted 2309 c609719bSwdenk 2310 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2311 c609719bSwdenk List of legal baudrate settings for this board. 2312 c609719bSwdenk 2313 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2314 c609719bSwdenk Suppress display of console information at boot. 2315 c609719bSwdenk 2316 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2317 c609719bSwdenk If the board specific function 2318 c609719bSwdenk extern int overwrite_console (void); 2319 c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2320 c609719bSwdenk serial port, else the settings in the environment are used. 2321 c609719bSwdenk 2322 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2323 c609719bSwdenk Enable the call to overwrite_console(). 2324 c609719bSwdenk 2325 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2326 c609719bSwdenk Enable overwrite of previous console environment settings. 2327 c609719bSwdenk 2328 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2329 c609719bSwdenk Begin and End addresses of the area used by the 2330 c609719bSwdenk simple memory test. 2331 c609719bSwdenk 2332 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2333 c609719bSwdenk Enable an alternate, more extensive memory test. 2334 c609719bSwdenk 2335 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 2336 5f535fe1Swdenk Scratch address used by the alternate memory test 2337 5f535fe1Swdenk You only need to set this if address zero isn't writeable 2338 5f535fe1Swdenk 2339 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 2340 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 2341 14f73ca6SStefan Roese this specified memory area will get subtracted from the top 2342 11ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 2343 14f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 2344 14f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 2345 14f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 2346 5e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 2347 14f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 2348 5e12e75dSStefan Roese will have to get fixed in Linux additionally. 2349 14f73ca6SStefan Roese 2350 14f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 2351 14f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 2352 14f73ca6SStefan Roese be touched. 2353 14f73ca6SStefan Roese 2354 14f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 2355 14f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 2356 14f73ca6SStefan Roese then the end address of the Linux memory will be located at a 2357 14f73ca6SStefan Roese non page size aligned address and this could cause major 2358 14f73ca6SStefan Roese problems. 2359 14f73ca6SStefan Roese 2360 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2361 c609719bSwdenk Default load address for network file downloads 2362 c609719bSwdenk 2363 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2364 c609719bSwdenk Enable temporary baudrate change while serial download 2365 c609719bSwdenk 2366 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2367 c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2368 c609719bSwdenk 2369 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2370 c609719bSwdenk Physical start address of Motherboard I/O (if using a 2371 c609719bSwdenk Cogent motherboard) 2372 c609719bSwdenk 2373 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2374 c609719bSwdenk Physical start address of Flash memory. 2375 c609719bSwdenk 2376 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2377 c609719bSwdenk Physical start address of boot monitor code (set by 2378 c609719bSwdenk make config files to be same as the text base address 2379 14d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 2380 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2381 c609719bSwdenk 2382 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 2383 3b57fe0aSwdenk Size of memory reserved for monitor code, used to 2384 3b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 2385 3b57fe0aSwdenk embedded within the U-Boot image, or in a separate 2386 3b57fe0aSwdenk flash sector. 2387 c609719bSwdenk 2388 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2389 c609719bSwdenk Size of DRAM reserved for malloc() use. 2390 c609719bSwdenk 2391 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 2392 15940c9aSStefan Roese Normally compressed uImages are limited to an 2393 15940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 2394 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 2395 15940c9aSStefan Roese to adjust this setting to your needs. 2396 c609719bSwdenk 2397 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2398 c609719bSwdenk Maximum size of memory mapped by the startup code of 2399 c609719bSwdenk the Linux kernel; all data that must be processed by 2400 7d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 2401 7d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 2402 7d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 2403 7d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2404 c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2405 c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2406 c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2407 c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2408 c609719bSwdenk 2409 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2410 fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2411 fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2412 fca43cc8SJohn Rigby is enabled. 2413 fca43cc8SJohn Rigby 2414 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2415 fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2416 fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2417 fca43cc8SJohn Rigby 2418 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2419 fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2420 fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2421 fca43cc8SJohn Rigby 2422 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2423 c609719bSwdenk Max number of Flash memory banks 2424 c609719bSwdenk 2425 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2426 c609719bSwdenk Max number of sectors on a Flash chip 2427 c609719bSwdenk 2428 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2429 c609719bSwdenk Timeout for Flash erase operations (in ms) 2430 c609719bSwdenk 2431 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2432 c609719bSwdenk Timeout for Flash write operations (in ms) 2433 c609719bSwdenk 2434 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 2435 8564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 2436 8564acf9Swdenk 2437 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 2438 8564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 2439 8564acf9Swdenk 2440 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 2441 8564acf9Swdenk If defined, hardware flash sectors protection is used 2442 8564acf9Swdenk instead of U-Boot software protection. 2443 8564acf9Swdenk 2444 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2445 c609719bSwdenk 2446 c609719bSwdenk Enable TFTP transfers directly to flash memory; 2447 c609719bSwdenk without this option such a download has to be 2448 c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2449 c609719bSwdenk copy from RAM to flash. 2450 c609719bSwdenk 2451 c609719bSwdenk The two-step approach is usually more reliable, since 2452 c609719bSwdenk you can check if the download worked before you erase 2453 11ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 2454 11ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2455 c609719bSwdenk downloaded image) this option may be very useful. 2456 c609719bSwdenk 2457 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2458 c609719bSwdenk Define if the flash driver uses extra elements in the 2459 5653fc33Swdenk common flash structure for storing flash geometry. 2460 5653fc33Swdenk 2461 00b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 2462 5653fc33Swdenk This option also enables the building of the cfi_flash driver 2463 5653fc33Swdenk in the drivers directory 2464 53cf9435Sstroese 2465 91809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 2466 91809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 2467 91809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 2468 91809ed5SPiotr Ziecik to the MTD layer. 2469 91809ed5SPiotr Ziecik 2470 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 2471 96ef831fSGuennadi Liakhovetski Use buffered writes to flash. 2472 96ef831fSGuennadi Liakhovetski 2473 96ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 2474 96ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 2475 96ef831fSGuennadi Liakhovetski write commands. 2476 96ef831fSGuennadi Liakhovetski 2477 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 2478 5568e613SStefan Roese If this option is defined, the common CFI flash doesn't 2479 5568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 2480 5568e613SStefan Roese is useful, if some of the configured banks are only 2481 5568e613SStefan Roese optionally available. 2482 5568e613SStefan Roese 2483 9a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 2484 9a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 2485 9a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 2486 9a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 2487 9a042e9cSJerry Van Baren 2488 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 2489 11ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 2490 11ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 2491 53cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 2492 53cf9435Sstroese buffers can be full shortly after enabling the interface 2493 11ccc33fSMarcel Ziswiler on high Ethernet traffic. 2494 53cf9435Sstroese Defaults to 4 if not defined. 2495 c609719bSwdenk 2496 ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2497 ea882bafSWolfgang Denk 2498 ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2499 ea882bafSWolfgang Denk internally to store the environment settings. The default 2500 ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2501 ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2502 ea882bafSWolfgang Denk lib/hashtable.c for details. 2503 ea882bafSWolfgang Denk 2504 c609719bSwdenkThe following definitions that deal with the placement and management 2505 c609719bSwdenkof environment data (variable area); in general, we support the 2506 c609719bSwdenkfollowing configurations: 2507 c609719bSwdenk 2508 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2509 c609719bSwdenk 2510 c609719bSwdenk Define this if the environment is in flash memory. 2511 c609719bSwdenk 2512 c609719bSwdenk a) The environment occupies one whole flash sector, which is 2513 c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2514 c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2515 c609719bSwdenk sector" type flash chips, which have several smaller 2516 c609719bSwdenk sectors at the start or the end. For instance, such a 2517 c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2518 c609719bSwdenk such a case you would place the environment in one of the 2519 c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2520 c609719bSwdenk "top boot sector" type flash chips, you would put the 2521 c609719bSwdenk environment in one of the last sectors, leaving a gap 2522 c609719bSwdenk between U-Boot and the environment. 2523 c609719bSwdenk 2524 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2525 c609719bSwdenk 2526 c609719bSwdenk Offset of environment data (variable area) to the 2527 c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2528 c609719bSwdenk type flash chips the second sector can be used: the offset 2529 c609719bSwdenk for this sector is given here. 2530 c609719bSwdenk 2531 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2532 c609719bSwdenk 2533 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2534 c609719bSwdenk 2535 c609719bSwdenk This is just another way to specify the start address of 2536 c609719bSwdenk the flash sector containing the environment (instead of 2537 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2538 c609719bSwdenk 2539 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2540 c609719bSwdenk 2541 c609719bSwdenk Size of the sector containing the environment. 2542 c609719bSwdenk 2543 c609719bSwdenk 2544 c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2545 c609719bSwdenk In such a case you don't want to spend a whole sector for 2546 c609719bSwdenk the environment. 2547 c609719bSwdenk 2548 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2549 c609719bSwdenk 2550 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 2551 0e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2552 c609719bSwdenk of this flash sector for the environment. This saves 2553 c609719bSwdenk memory for the RAM copy of the environment. 2554 c609719bSwdenk 2555 c609719bSwdenk It may also save flash memory if you decide to use this 2556 c609719bSwdenk when your environment is "embedded" within U-Boot code, 2557 c609719bSwdenk since then the remainder of the flash sector could be used 2558 c609719bSwdenk for U-Boot code. It should be pointed out that this is 2559 c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2560 c609719bSwdenk updating the environment in flash makes it always 2561 c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2562 c609719bSwdenk wrong before the contents has been restored from a copy in 2563 c609719bSwdenk RAM, your target system will be dead. 2564 c609719bSwdenk 2565 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 2566 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2567 c609719bSwdenk 2568 c609719bSwdenk These settings describe a second storage area used to hold 2569 11ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 2570 3e38691eSwdenk a valid backup copy in case there is a power failure during 2571 c609719bSwdenk a "saveenv" operation. 2572 c609719bSwdenk 2573 c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2574 c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2575 c609719bSwdenkaccordingly! 2576 c609719bSwdenk 2577 c609719bSwdenk 2578 9314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2579 c609719bSwdenk 2580 c609719bSwdenk Define this if you have some non-volatile memory device 2581 c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2582 c609719bSwdenk environment. 2583 c609719bSwdenk 2584 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2585 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2586 c609719bSwdenk 2587 11ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2588 c609719bSwdenk want to use for environment. It is assumed that this memory 2589 c609719bSwdenk can just be read and written to, without any special 2590 c609719bSwdenk provision. 2591 c609719bSwdenk 2592 c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2593 c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 2594 11ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2595 c609719bSwdenkU-Boot will hang. 2596 c609719bSwdenk 2597 c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2598 c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2599 c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2600 c609719bSwdenkto save the current settings. 2601 c609719bSwdenk 2602 c609719bSwdenk 2603 bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2604 c609719bSwdenk 2605 c609719bSwdenk Use this if you have an EEPROM or similar serial access 2606 c609719bSwdenk device and a driver for it. 2607 c609719bSwdenk 2608 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2609 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2610 c609719bSwdenk 2611 c609719bSwdenk These two #defines specify the offset and size of the 2612 c609719bSwdenk environment area within the total memory of your EEPROM. 2613 c609719bSwdenk 2614 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2615 c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2616 c609719bSwdenk The default address is zero. 2617 c609719bSwdenk 2618 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2619 c609719bSwdenk If defined, the number of bits used to address bytes in a 2620 c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2621 c609719bSwdenk would require six bits. 2622 c609719bSwdenk 2623 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2624 c609719bSwdenk If defined, the number of milliseconds to delay between 2625 c609719bSwdenk page writes. The default is zero milliseconds. 2626 c609719bSwdenk 2627 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2628 c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2629 c609719bSwdenk that this is NOT the chip address length! 2630 c609719bSwdenk 2631 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 2632 5cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 2633 5cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 2634 5cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 2635 5cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 2636 5cf91d6bSwdenk byte chips. 2637 5cf91d6bSwdenk 2638 5cf91d6bSwdenk Note that we consider the length of the address field to 2639 5cf91d6bSwdenk still be one byte because the extra address bits are hidden 2640 5cf91d6bSwdenk in the chip address. 2641 5cf91d6bSwdenk 2642 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2643 c609719bSwdenk The size in bytes of the EEPROM device. 2644 c609719bSwdenk 2645 548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 2646 548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 2647 548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 2648 548738b4SHeiko Schocher 2649 548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 2650 548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 2651 548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 2652 548738b4SHeiko Schocher EEPROM. For example: 2653 548738b4SHeiko Schocher 2654 548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 2655 548738b4SHeiko Schocher 2656 548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 2657 548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 2658 c609719bSwdenk 2659 057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 2660 5779d8d9Swdenk 2661 5779d8d9Swdenk Define this if you have a DataFlash memory device which you 2662 5779d8d9Swdenk want to use for the environment. 2663 5779d8d9Swdenk 2664 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2665 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2666 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2667 5779d8d9Swdenk 2668 5779d8d9Swdenk These three #defines specify the offset and size of the 2669 5779d8d9Swdenk environment area within the total memory of your DataFlash placed 2670 5779d8d9Swdenk at the specified address. 2671 5779d8d9Swdenk 2672 51bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 2673 13a5695bSwdenk 2674 13a5695bSwdenk Define this if you have a NAND device which you want to use 2675 13a5695bSwdenk for the environment. 2676 13a5695bSwdenk 2677 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2678 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2679 13a5695bSwdenk 2680 13a5695bSwdenk These two #defines specify the offset and size of the environment 2681 fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 2682 fdd813deSScott Wood aligned to an erase block boundary. 2683 5779d8d9Swdenk 2684 fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 2685 e443c944SMarkus Klotzbuecher 2686 0e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2687 fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 2688 fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 2689 fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 2690 fdd813deSScott Wood aligned to an erase block boundary. 2691 e443c944SMarkus Klotzbuecher 2692 fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 2693 fdd813deSScott Wood 2694 fdd813deSScott Wood Specifies the length of the region in which the environment 2695 fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 2696 fdd813deSScott Wood block size. Specifying a range with more erase blocks than 2697 fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 2698 fdd813deSScott Wood the range to be avoided. 2699 fdd813deSScott Wood 2700 fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 2701 fdd813deSScott Wood 2702 fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 2703 fdd813deSScott Wood environment from block zero's out-of-band data. The 2704 fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 2705 fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 2706 fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 2707 e443c944SMarkus Klotzbuecher 2708 b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 2709 b74ab737SGuennadi Liakhovetski 2710 b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 2711 b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 2712 b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 2713 b74ab737SGuennadi Liakhovetski 2714 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 2715 c609719bSwdenk 2716 c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2717 c609719bSwdenk area is used at an early stage (ROM part) if the environment 2718 c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2719 c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2720 c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2721 c609719bSwdenk to be a good choice since it makes it far enough from the 2722 c609719bSwdenk start of the data area as well as from the stack pointer. 2723 c609719bSwdenk 2724 e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2725 c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2726 cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 2727 c609719bSwdenkuntil then to read environment variables. 2728 c609719bSwdenk 2729 85ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 2730 85ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 2731 85ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 2732 85ec0bccSwdenknecessary, because the first environment variable we need is the 2733 85ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 2734 85ec0bccSwdenkhave any device yet where we could complain.] 2735 c609719bSwdenk 2736 c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2737 c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 2738 85ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2739 c609719bSwdenk 2740 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 2741 fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2742 fc3e2165Swdenk 2743 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 2744 fc3e2165Swdenk also needs to be defined. 2745 fc3e2165Swdenk 2746 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 2747 fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2748 c609719bSwdenk 2749 f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 2750 f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 2751 f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 2752 f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 2753 f5675aa5SRon Madrid space for already greatly restricted images, including but not 2754 f5675aa5SRon Madrid limited to NAND_SPL configurations. 2755 f5675aa5SRon Madrid 2756 c609719bSwdenkLow Level (hardware related) configuration options: 2757 dc7c9a1aSwdenk--------------------------------------------------- 2758 c609719bSwdenk 2759 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 2760 c609719bSwdenk Cache Line Size of the CPU. 2761 c609719bSwdenk 2762 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 2763 c609719bSwdenk Default address of the IMMR after system reset. 2764 2535d602Swdenk 2765 2535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 2766 2535d602Swdenk and RPXsuper) to be able to adjust the position of 2767 2535d602Swdenk the IMMR register after a reset. 2768 c609719bSwdenk 2769 7f6c2cbcSwdenk- Floppy Disk Support: 2770 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 2771 7f6c2cbcSwdenk 2772 7f6c2cbcSwdenk the default drive number (default value 0) 2773 7f6c2cbcSwdenk 2774 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 2775 7f6c2cbcSwdenk 2776 11ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 2777 7f6c2cbcSwdenk (default value 1) 2778 7f6c2cbcSwdenk 2779 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 2780 7f6c2cbcSwdenk 2781 7f6c2cbcSwdenk defines the offset of register from address. It 2782 7f6c2cbcSwdenk depends on which part of the data bus is connected to 2783 11ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 2784 7f6c2cbcSwdenk 2785 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 2786 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 2787 7f6c2cbcSwdenk default value. 2788 7f6c2cbcSwdenk 2789 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 2790 7f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 2791 7f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 2792 7f6c2cbcSwdenk source code. It is used to make hardware dependant 2793 7f6c2cbcSwdenk initializations. 2794 7f6c2cbcSwdenk 2795 0abddf82SMacpaul Lin- CONFIG_IDE_AHB: 2796 0abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 2797 0abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 2798 0abddf82SMacpaul Lin When software is doing ATA command and data transfer to 2799 0abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 2800 0abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 2801 0abddf82SMacpaul Lin is requierd. 2802 0abddf82SMacpaul Lin 2803 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 2804 25d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 2805 25d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2806 c609719bSwdenk 2807 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 2808 c609719bSwdenk 2809 7152b1d0Swdenk Start address of memory area that can be used for 2810 c609719bSwdenk initial data and stack; please note that this must be 2811 c609719bSwdenk writable memory that is working WITHOUT special 2812 c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2813 c609719bSwdenk will become available only after programming the 2814 c609719bSwdenk memory controller and running certain initialization 2815 c609719bSwdenk sequences. 2816 c609719bSwdenk 2817 c609719bSwdenk U-Boot uses the following memory types: 2818 c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2819 c609719bSwdenk - MPC824X: data cache 2820 c609719bSwdenk - PPC4xx: data cache 2821 c609719bSwdenk 2822 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 2823 c609719bSwdenk 2824 c609719bSwdenk Offset of the initial data structure in the memory 2825 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 2826 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 2827 c609719bSwdenk data is located at the end of the available space 2828 553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 2829 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 2830 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 2831 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 2832 c609719bSwdenk 2833 c609719bSwdenk Note: 2834 c609719bSwdenk On the MPC824X (or other systems that use the data 2835 c609719bSwdenk cache for initial memory) the address chosen for 2836 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 2837 c609719bSwdenk point to an otherwise UNUSED address space between 2838 c609719bSwdenk the top of RAM and the start of the PCI space. 2839 c609719bSwdenk 2840 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 2841 c609719bSwdenk 2842 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 2843 c609719bSwdenk 2844 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 2845 c609719bSwdenk 2846 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 2847 c609719bSwdenk 2848 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 2849 c609719bSwdenk 2850 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 2851 c609719bSwdenk 2852 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 2853 c609719bSwdenk SDRAM timing 2854 c609719bSwdenk 2855 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 2856 c609719bSwdenk periodic timer for refresh 2857 c609719bSwdenk 2858 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 2859 c609719bSwdenk 2860 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 2861 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 2862 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 2863 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 2864 c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 2865 c609719bSwdenk 2866 c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 2867 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 2868 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 2869 c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 2870 c609719bSwdenk 2871 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 2872 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 2873 c609719bSwdenk Machine Mode Register and Memory Periodic Timer 2874 c609719bSwdenk Prescaler definitions (SDRAM timing) 2875 c609719bSwdenk 2876 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 2877 c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 2878 c609719bSwdenk define relocation offset in DPRAM [DSP2] 2879 c609719bSwdenk 2880 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 2881 b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 2882 b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 2883 b423d055SHeiko Schocher 2884 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 2885 c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 2886 c609719bSwdenk define relocation offset in DPRAM [SCC4] 2887 c609719bSwdenk 2888 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 2889 c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 2890 c609719bSwdenk wrong setting might damage your board. Read 2891 c609719bSwdenk doc/README.MBX before setting this variable! 2892 c609719bSwdenk 2893 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 2894 ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 2895 ea909b76Swdenk (Power On Self Tests). This definition overrides 2896 ea909b76Swdenk #define'd default value in commproc.h resp. 2897 ea909b76Swdenk cpm_8260.h. 2898 ea909b76Swdenk 2899 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 2900 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 2901 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 2902 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 2903 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 2904 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 2905 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 2906 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 2907 a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 2908 5d232d0eSwdenk 2909 9cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 2910 9cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 2911 9cacf4fcSDirk Eibach required. 2912 9cacf4fcSDirk Eibach 2913 a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 2914 a09b9b68SKumar Gala Chip has SRIO or not 2915 a09b9b68SKumar Gala 2916 a09b9b68SKumar Gala- CONFIG_SRIO1: 2917 a09b9b68SKumar Gala Board has SRIO 1 port available 2918 a09b9b68SKumar Gala 2919 a09b9b68SKumar Gala- CONFIG_SRIO2: 2920 a09b9b68SKumar Gala Board has SRIO 2 port available 2921 a09b9b68SKumar Gala 2922 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 2923 a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 2924 a09b9b68SKumar Gala 2925 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 2926 a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 2927 a09b9b68SKumar Gala 2928 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 2929 a09b9b68SKumar Gala Size of SRIO port 'n' memory region 2930 a09b9b68SKumar Gala 2931 eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 2932 eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 2933 eced4626SAlex Waterman 16 bit bus. 2934 eced4626SAlex Waterman 2935 eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 2936 eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 2937 eced4626SAlex Waterman a default value will be used. 2938 eced4626SAlex Waterman 2939 bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 2940 218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 2941 218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 2942 218ca724SWolfgang Denk 2943 bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 2944 bb99ad6dSBen Warren I2C address of the SPD EEPROM 2945 bb99ad6dSBen Warren 2946 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 2947 218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 2948 218ca724SWolfgang Denk one, specify here. Note that the value must resolve 2949 218ca724SWolfgang Denk to something your driver can deal with. 2950 bb99ad6dSBen Warren 2951 *1b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 2952 *1b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 2953 *1b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 2954 *1b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 2955 *1b3e3c4fSYork Sun header files or board specific files. 2956 *1b3e3c4fSYork Sun 2957 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 2958 218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 2959 218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 2960 2ad6b513STimur Tabi 2961 c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 2962 c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 2963 c26e454dSwdenk 2964 c26e454dSwdenk- CONFIG_FEC[12]_PHY 2965 c26e454dSwdenk Define to the hardcoded PHY address which corresponds 2966 6e592385Swdenk to the given FEC; i. e. 2967 c26e454dSwdenk #define CONFIG_FEC1_PHY 4 2968 c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 2969 c26e454dSwdenk 2970 c26e454dSwdenk When set to -1, means to probe for first available. 2971 c26e454dSwdenk 2972 c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 2973 c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 2974 c26e454dSwdenk (so program the FEC to ignore it). 2975 c26e454dSwdenk 2976 c26e454dSwdenk- CONFIG_RMII 2977 c26e454dSwdenk Enable RMII mode for all FECs. 2978 c26e454dSwdenk Note that this is a global option, we can't 2979 c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 2980 c26e454dSwdenk 2981 5cf91d6bSwdenk- CONFIG_CRC32_VERIFY 2982 5cf91d6bSwdenk Add a verify option to the crc32 command. 2983 5cf91d6bSwdenk The syntax is: 2984 5cf91d6bSwdenk 2985 5cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 2986 5cf91d6bSwdenk 2987 5cf91d6bSwdenk Where address/count indicate a memory area 2988 5cf91d6bSwdenk and crc32 is the correct crc32 which the 2989 5cf91d6bSwdenk area should have. 2990 5cf91d6bSwdenk 2991 56523f12Swdenk- CONFIG_LOOPW 2992 56523f12Swdenk Add the "loopw" memory command. This only takes effect if 2993 602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 2994 56523f12Swdenk 2995 7b466641Sstroese- CONFIG_MX_CYCLIC 2996 7b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 2997 7b466641Sstroese "md/mw" commands. 2998 7b466641Sstroese Examples: 2999 7b466641Sstroese 3000 7b466641Sstroese => mdc.b 10 4 500 3001 7b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 3002 7b466641Sstroese 3003 7b466641Sstroese => mwc.l 100 12345678 10 3004 7b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 3005 7b466641Sstroese 3006 7b466641Sstroese This only takes effect if the memory commands are activated 3007 602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 3008 7b466641Sstroese 3009 8aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3010 e03f3169SWolfgang Denk [ARM only] If this variable is defined, then certain 3011 e03f3169SWolfgang Denk low level initializations (like setting up the memory 3012 e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3013 e03f3169SWolfgang Denk relocate itself into RAM. 3014 8aa1a2d1Swdenk 3015 e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3016 e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3017 e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3018 e03f3169SWolfgang Denk these initializations itself. 3019 8aa1a2d1Swdenk 3020 df81238bSMagnus Lilja- CONFIG_PRELOADER 3021 df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3022 df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3023 df81238bSMagnus Lilja compiling a NAND SPL. 3024 400558b5Swdenk 3025 d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3026 d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3027 d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3028 d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3029 d8834a13SMatthias Weisser conditions but may increase the binary size. 3030 d8834a13SMatthias Weisser 3031 c609719bSwdenkBuilding the Software: 3032 c609719bSwdenk====================== 3033 c609719bSwdenk 3034 218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3035 218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3036 218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3037 218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3038 218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3039 218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3040 c609719bSwdenk 3041 218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3042 218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3043 218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3044 218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3045 218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3046 c609719bSwdenk 3047 218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3048 218ca724SWolfgang Denk $ export CROSS_COMPILE 3049 c609719bSwdenk 3050 2f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 3051 2f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 3052 2f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 3053 2f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 3054 2f8d396bSPeter Tyser 3055 2f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 3056 2f8d396bSPeter Tyser 3057 2f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 3058 2f8d396bSPeter Tyser be executed on computers running Windows. 3059 2f8d396bSPeter Tyser 3060 c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3061 c609719bSwdenksources you must configure U-Boot for one specific board type. This 3062 c609719bSwdenkis done by typing: 3063 c609719bSwdenk 3064 c609719bSwdenk make NAME_config 3065 c609719bSwdenk 3066 218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 3067 218ca724SWolfgang Denkrations; see the main Makefile for supported names. 3068 54387ac9Swdenk 3069 c609719bSwdenkNote: for some board special configuration names may exist; check if 3070 c609719bSwdenk additional information is available from the board vendor; for 3071 2729af9dSwdenk instance, the TQM823L systems are available without (standard) 3072 2729af9dSwdenk or with LCD support. You can select such additional "features" 3073 11ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3074 c609719bSwdenk 3075 2729af9dSwdenk make TQM823L_config 3076 2729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3077 c609719bSwdenk 3078 c609719bSwdenk make TQM823L_LCD_config 3079 c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3080 c609719bSwdenk 3081 c609719bSwdenk etc. 3082 c609719bSwdenk 3083 c609719bSwdenk 3084 c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 3085 7152b1d0Swdenkimages ready for download to / installation on your system: 3086 c609719bSwdenk 3087 c609719bSwdenk- "u-boot.bin" is a raw binary image 3088 c609719bSwdenk- "u-boot" is an image in ELF binary format 3089 c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3090 c609719bSwdenk 3091 baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3092 baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3093 baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3094 baf31249SMarian Balakowicz 3095 baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3096 baf31249SMarian Balakowicz 3097 baf31249SMarian Balakowicz make O=/tmp/build distclean 3098 baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3099 baf31249SMarian Balakowicz make O=/tmp/build all 3100 baf31249SMarian Balakowicz 3101 baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3102 baf31249SMarian Balakowicz 3103 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3104 baf31249SMarian Balakowicz make distclean 3105 baf31249SMarian Balakowicz make NAME_config 3106 baf31249SMarian Balakowicz make all 3107 baf31249SMarian Balakowicz 3108 baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3109 baf31249SMarian Balakowiczvariable. 3110 baf31249SMarian Balakowicz 3111 c609719bSwdenk 3112 c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3113 c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3114 c609719bSwdenknative "make". 3115 c609719bSwdenk 3116 c609719bSwdenk 3117 c609719bSwdenkIf the system board that you have is not listed, then you will need 3118 c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3119 c609719bSwdenksteps: 3120 c609719bSwdenk 3121 c609719bSwdenk1. Add a new configuration option for your board to the toplevel 3122 85ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 3123 85ec0bccSwdenk entries as examples. Note that here and at many other places 3124 7152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 3125 85ec0bccSwdenk keep this order. 3126 c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 3127 85ec0bccSwdenk files you need. In your board directory, you will need at least 3128 85ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 3129 85ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 3130 85ec0bccSwdenk your board 3131 c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3132 c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 3133 85ec0bccSwdenk4. Run "make <board>_config" with your new name. 3134 c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3135 c609719bSwdenk to be installed on your target system. 3136 85ec0bccSwdenk6. Debug and solve any problems that might arise. 3137 c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3138 c609719bSwdenk 3139 c609719bSwdenk 3140 c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3141 c609719bSwdenk============================================================== 3142 c609719bSwdenk 3143 c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3144 c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3145 c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3146 c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3147 218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3148 c609719bSwdenk 3149 c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3150 c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3151 c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3152 c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3153 c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 3154 7152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3155 218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3156 218ca724SWolfgang Denkyou can type 3157 c609719bSwdenk 3158 c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3159 c609719bSwdenk 3160 c609719bSwdenkor to build on a native PowerPC system you can type 3161 c609719bSwdenk 3162 c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3163 c609719bSwdenk 3164 218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3165 218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3166 218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3167 218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3168 218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3169 218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3170 218ca724SWolfgang Denkvariable. For example: 3171 baf31249SMarian Balakowicz 3172 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3173 baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3174 baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3175 baf31249SMarian Balakowicz 3176 218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3177 218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3178 218ca724SWolfgang Denkduring the whole build process. 3179 baf31249SMarian Balakowicz 3180 baf31249SMarian Balakowicz 3181 c609719bSwdenkSee also "U-Boot Porting Guide" below. 3182 c609719bSwdenk 3183 c609719bSwdenk 3184 c609719bSwdenkMonitor Commands - Overview: 3185 c609719bSwdenk============================ 3186 c609719bSwdenk 3187 c609719bSwdenkgo - start application at address 'addr' 3188 c609719bSwdenkrun - run commands in an environment variable 3189 c609719bSwdenkbootm - boot application image from memory 3190 c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3191 c609719bSwdenktftpboot- boot image via network using TFTP protocol 3192 c609719bSwdenk and env variables "ipaddr" and "serverip" 3193 c609719bSwdenk (and eventually "gatewayip") 3194 c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3195 c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3196 c609719bSwdenkloads - load S-Record file over serial line 3197 c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3198 c609719bSwdenkmd - memory display 3199 c609719bSwdenkmm - memory modify (auto-incrementing) 3200 c609719bSwdenknm - memory modify (constant address) 3201 c609719bSwdenkmw - memory write (fill) 3202 c609719bSwdenkcp - memory copy 3203 c609719bSwdenkcmp - memory compare 3204 c609719bSwdenkcrc32 - checksum calculation 3205 0f89c54bSPeter Tyseri2c - I2C sub-system 3206 c609719bSwdenksspi - SPI utility commands 3207 c609719bSwdenkbase - print or set address offset 3208 c609719bSwdenkprintenv- print environment variables 3209 c609719bSwdenksetenv - set environment variables 3210 c609719bSwdenksaveenv - save environment variables to persistent storage 3211 c609719bSwdenkprotect - enable or disable FLASH write protection 3212 c609719bSwdenkerase - erase FLASH memory 3213 c609719bSwdenkflinfo - print FLASH memory information 3214 c609719bSwdenkbdinfo - print Board Info structure 3215 c609719bSwdenkiminfo - print header information for application image 3216 c609719bSwdenkconinfo - print console devices and informations 3217 c609719bSwdenkide - IDE sub-system 3218 c609719bSwdenkloop - infinite loop on address range 3219 56523f12Swdenkloopw - infinite write loop on address range 3220 c609719bSwdenkmtest - simple RAM test 3221 c609719bSwdenkicache - enable or disable instruction cache 3222 c609719bSwdenkdcache - enable or disable data cache 3223 c609719bSwdenkreset - Perform RESET of the CPU 3224 c609719bSwdenkecho - echo args to console 3225 c609719bSwdenkversion - print monitor version 3226 c609719bSwdenkhelp - print online help 3227 c609719bSwdenk? - alias for 'help' 3228 c609719bSwdenk 3229 c609719bSwdenk 3230 c609719bSwdenkMonitor Commands - Detailed Description: 3231 c609719bSwdenk======================================== 3232 c609719bSwdenk 3233 c609719bSwdenkTODO. 3234 c609719bSwdenk 3235 c609719bSwdenkFor now: just type "help <command>". 3236 c609719bSwdenk 3237 c609719bSwdenk 3238 c609719bSwdenkEnvironment Variables: 3239 c609719bSwdenk====================== 3240 c609719bSwdenk 3241 c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3242 c609719bSwdenkcan be made persistent by saving to Flash memory. 3243 c609719bSwdenk 3244 c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3245 c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3246 c609719bSwdenkwithout a value can be used to delete a variable from the 3247 c609719bSwdenkenvironment. As long as you don't save the environment you are 3248 c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3249 c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3250 c609719bSwdenk 3251 c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3252 c96f86eeSWolfgang Denk 3253 c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3254 c609719bSwdenk 3255 c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3256 c609719bSwdenk 3257 c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3258 c609719bSwdenk 3259 c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3260 c609719bSwdenk 3261 c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3262 c609719bSwdenk 3263 c609719bSwdenk bootfile - Name of the image to load with TFTP 3264 c609719bSwdenk 3265 7d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 3266 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3267 7d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 3268 7d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 3269 7d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 3270 7d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3271 c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3272 c3624e6eSGrant Likely bootm_mapsize. 3273 c3624e6eSGrant Likely 3274 c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3275 c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3276 c3624e6eSGrant Likely defines the size of the memory region starting at base 3277 c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3278 c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3279 c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3280 c3624e6eSGrant Likely used otherwise. 3281 7d721e34SBartlomiej Sieka 3282 7d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 3283 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3284 7d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 3285 7d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 3286 7d721e34SBartlomiej Sieka environment variable. 3287 7d721e34SBartlomiej Sieka 3288 4bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 3289 4bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 3290 4bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 3291 4bae9090SBartlomiej Sieka 3292 c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3293 c609719bSwdenk "bootp" will just load perform a lookup of the 3294 c609719bSwdenk configuration from the BOOTP server, but not try to 3295 c609719bSwdenk load any image using TFTP 3296 c609719bSwdenk 3297 c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3298 c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3299 c609719bSwdenk be automatically started (by internally calling 3300 c609719bSwdenk "bootm") 3301 c609719bSwdenk 3302 4a6fd34bSwdenk If set to "no", a standalone image passed to the 3303 4a6fd34bSwdenk "bootm" command will be copied to the load address 3304 4a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 3305 4a6fd34bSwdenk This can be used to load and uncompress arbitrary 3306 4a6fd34bSwdenk data. 3307 4a6fd34bSwdenk 3308 17ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 3309 17ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 3310 17ea1177Swdenk mode (400kHZ). This environment variable is used in 3311 17ea1177Swdenk initialization code. So, for changes to be effective 3312 17ea1177Swdenk it must be saved and board must be reset. 3313 17ea1177Swdenk 3314 c609719bSwdenk initrd_high - restrict positioning of initrd images: 3315 c609719bSwdenk If this variable is not set, initrd images will be 3316 c609719bSwdenk copied to the highest possible address in RAM; this 3317 c609719bSwdenk is usually what you want since it allows for 3318 c609719bSwdenk maximum initrd size. If for some reason you want to 3319 c609719bSwdenk make sure that the initrd image is loaded below the 3320 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3321 c609719bSwdenk variable to a value of "no" or "off" or "0". 3322 c609719bSwdenk Alternatively, you can set it to a maximum upper 3323 c609719bSwdenk address to use (U-Boot will still check that it 3324 c609719bSwdenk does not overwrite the U-Boot stack and data). 3325 c609719bSwdenk 3326 c609719bSwdenk For instance, when you have a system with 16 MB 3327 7152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3328 c609719bSwdenk you can do this by adding "mem=12M" to the value of 3329 c609719bSwdenk the "bootargs" variable. However, now you must make 3330 7152b1d0Swdenk sure that the initrd image is placed in the first 3331 c609719bSwdenk 12 MB as well - this can be done with 3332 c609719bSwdenk 3333 c609719bSwdenk setenv initrd_high 00c00000 3334 c609719bSwdenk 3335 38b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 3336 38b99261Swdenk indication to U-Boot that all addresses are legal 3337 38b99261Swdenk for the Linux kernel, including addresses in flash 3338 38b99261Swdenk memory. In this case U-Boot will NOT COPY the 3339 38b99261Swdenk ramdisk at all. This may be useful to reduce the 3340 38b99261Swdenk boot time on your system, but requires that this 3341 38b99261Swdenk feature is supported by your Linux kernel. 3342 38b99261Swdenk 3343 c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3344 c609719bSwdenk 3345 c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3346 dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3347 c609719bSwdenk 3348 c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3349 c609719bSwdenk 3350 c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3351 c609719bSwdenk 3352 c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3353 c609719bSwdenk 3354 c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3355 c609719bSwdenk 3356 c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3357 c609719bSwdenk 3358 a3d991bdSwdenk ethprime - When CONFIG_NET_MULTI is enabled controls which 3359 a3d991bdSwdenk interface is used first. 3360 a3d991bdSwdenk 3361 a3d991bdSwdenk ethact - When CONFIG_NET_MULTI is enabled controls which 3362 a3d991bdSwdenk interface is currently active. For example you 3363 a3d991bdSwdenk can do the following 3364 a3d991bdSwdenk 3365 48690d80SHeiko Schocher => setenv ethact FEC 3366 48690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 3367 48690d80SHeiko Schocher => setenv ethact SCC 3368 48690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3369 a3d991bdSwdenk 3370 e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3371 e1692577SMatthias Fuchs available network interfaces. 3372 e1692577SMatthias Fuchs It just stays at the currently selected interface. 3373 e1692577SMatthias Fuchs 3374 a3d991bdSwdenk netretry - When set to "no" each network operation will 3375 a3d991bdSwdenk either succeed or fail without retrying. 3376 6e592385Swdenk When set to "once" the network operation will 3377 6e592385Swdenk fail when all the available network interfaces 3378 6e592385Swdenk are tried once without success. 3379 a3d991bdSwdenk Useful on scripts which control the retry operation 3380 a3d991bdSwdenk themselves. 3381 a3d991bdSwdenk 3382 b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3383 a1cf027aSJean-Christophe PLAGNIOL-VILLARD 3384 28cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3385 ecb0ccd9SWolfgang Denk UDP source port. 3386 ecb0ccd9SWolfgang Denk 3387 28cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 3388 28cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 3389 28cb9375SWolfgang Denk 3390 c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3391 c96f86eeSWolfgang Denk we use the TFTP server's default block size 3392 c96f86eeSWolfgang Denk 3393 c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3394 c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3395 c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3396 c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3397 c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3398 c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3399 c96f86eeSWolfgang Denk with unreliable TFTP servers. 3400 c96f86eeSWolfgang Denk 3401 a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 3402 11ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3403 a3d991bdSwdenk VLAN tagged frames. 3404 c609719bSwdenk 3405 c609719bSwdenkThe following environment variables may be used and automatically 3406 c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3407 c609719bSwdenkdepending the information provided by your boot server: 3408 c609719bSwdenk 3409 c609719bSwdenk bootfile - see above 3410 c609719bSwdenk dnsip - IP address of your Domain Name Server 3411 fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3412 c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3413 c609719bSwdenk hostname - Target hostname 3414 c609719bSwdenk ipaddr - see above 3415 c609719bSwdenk netmask - Subnet Mask 3416 c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3417 c609719bSwdenk serverip - see above 3418 c609719bSwdenk 3419 c609719bSwdenk 3420 c609719bSwdenkThere are two special Environment Variables: 3421 c609719bSwdenk 3422 c609719bSwdenk serial# - contains hardware identification information such 3423 c609719bSwdenk as type string and/or serial number 3424 c609719bSwdenk ethaddr - Ethernet address 3425 c609719bSwdenk 3426 c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3427 c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3428 c609719bSwdenkonce they have been set once. 3429 c609719bSwdenk 3430 c609719bSwdenk 3431 c1551ea8SstroeseFurther special Environment Variables: 3432 c1551ea8Sstroese 3433 c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3434 c1551ea8Sstroese with the "version" command. This variable is 3435 c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3436 c1551ea8Sstroese 3437 c1551ea8Sstroese 3438 c609719bSwdenkPlease note that changes to some configuration parameters may take 3439 c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3440 c609719bSwdenk 3441 c609719bSwdenk 3442 f07771ccSwdenkCommand Line Parsing: 3443 f07771ccSwdenk===================== 3444 f07771ccSwdenk 3445 f07771ccSwdenkThere are two different command line parsers available with U-Boot: 3446 7152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3447 f07771ccSwdenk 3448 f07771ccSwdenkOld, simple command line parser: 3449 f07771ccSwdenk-------------------------------- 3450 f07771ccSwdenk 3451 f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3452 f07771ccSwdenk- several commands on one line, separated by ';' 3453 fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3454 f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3455 f07771ccSwdenk for example: 3456 fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3457 f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3458 f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3459 f07771ccSwdenk 3460 f07771ccSwdenkHush shell: 3461 f07771ccSwdenk----------- 3462 f07771ccSwdenk 3463 f07771ccSwdenk- similar to Bourne shell, with control structures like 3464 f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3465 f07771ccSwdenk until...do...done, ... 3466 f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3467 f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3468 f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3469 f07771ccSwdenk command 3470 f07771ccSwdenk 3471 f07771ccSwdenkGeneral rules: 3472 f07771ccSwdenk-------------- 3473 f07771ccSwdenk 3474 f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3475 f07771ccSwdenk command) contains several commands separated by semicolon, and 3476 f07771ccSwdenk one of these commands fails, then the remaining commands will be 3477 f07771ccSwdenk executed anyway. 3478 f07771ccSwdenk 3479 f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 3480 11ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3481 f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3482 f07771ccSwdenk variables are not executed. 3483 f07771ccSwdenk 3484 c609719bSwdenkNote for Redundant Ethernet Interfaces: 3485 c609719bSwdenk======================================= 3486 c609719bSwdenk 3487 11ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3488 c609719bSwdenksuch configurations and is capable of automatic selection of a 3489 7152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3490 c609719bSwdenk 3491 c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3492 c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3493 c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3494 c609719bSwdenk 3495 c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3496 c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3497 c609719bSwdenkding setting in the environment; if the corresponding environment 3498 c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3499 c609719bSwdenk 3500 c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3501 c609719bSwdenk environment, the SROM's address is used. 3502 c609719bSwdenk 3503 c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3504 c609719bSwdenk environment exists, then the value from the environment variable is 3505 c609719bSwdenk used. 3506 c609719bSwdenk 3507 c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3508 c609719bSwdenk both addresses are the same, this MAC address is used. 3509 c609719bSwdenk 3510 c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3511 c609719bSwdenk addresses differ, the value from the environment is used and a 3512 c609719bSwdenk warning is printed. 3513 c609719bSwdenk 3514 c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3515 c609719bSwdenk is raised. 3516 c609719bSwdenk 3517 ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 3518 ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 3519 ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 3520 ecee9324SBen WarrenThe naming convention is as follows: 3521 ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 3522 c609719bSwdenk 3523 c609719bSwdenkImage Formats: 3524 c609719bSwdenk============== 3525 c609719bSwdenk 3526 3310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 3527 3310c549SMarian Balakowiczimages in two formats: 3528 3310c549SMarian Balakowicz 3529 3310c549SMarian BalakowiczNew uImage format (FIT) 3530 3310c549SMarian Balakowicz----------------------- 3531 3310c549SMarian Balakowicz 3532 3310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 3533 3310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 3534 3310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 3535 3310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 3536 3310c549SMarian Balakowicz 3537 3310c549SMarian Balakowicz 3538 3310c549SMarian BalakowiczOld uImage format 3539 3310c549SMarian Balakowicz----------------- 3540 3310c549SMarian Balakowicz 3541 3310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 3542 3310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 3543 3310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3544 c609719bSwdenk 3545 c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3546 c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3547 f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3548 f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3549 f5ed9e39SPeter Tyser INTEGRITY). 3550 7b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 3551 1117cbf2SThomas Chou IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 3552 1117cbf2SThomas Chou Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC). 3553 c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3554 c609719bSwdenk* Load Address 3555 c609719bSwdenk* Entry Point 3556 c609719bSwdenk* Image Name 3557 c609719bSwdenk* Image Timestamp 3558 c609719bSwdenk 3559 c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3560 c609719bSwdenkand the data portions of the image are secured against corruption by 3561 c609719bSwdenkCRC32 checksums. 3562 c609719bSwdenk 3563 c609719bSwdenk 3564 c609719bSwdenkLinux Support: 3565 c609719bSwdenk============== 3566 c609719bSwdenk 3567 c609719bSwdenkAlthough U-Boot should support any OS or standalone application 3568 7152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3569 c609719bSwdenkU-Boot. 3570 c609719bSwdenk 3571 c609719bSwdenkU-Boot includes many features that so far have been part of some 3572 c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3573 c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3574 c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 3575 7152b1d0Swdenkserves several purposes: 3576 c609719bSwdenk 3577 c609719bSwdenk- the same features can be used for other OS or standalone 3578 c609719bSwdenk applications (for instance: using compressed images to reduce the 3579 c609719bSwdenk Flash memory footprint) 3580 c609719bSwdenk 3581 c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 3582 7152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 3583 c609719bSwdenk 3584 c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 3585 c609719bSwdenk images; of course this also means that different kernel images can 3586 c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 3587 c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 3588 c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3589 c609719bSwdenk software is easier now. 3590 c609719bSwdenk 3591 c609719bSwdenk 3592 c609719bSwdenkLinux HOWTO: 3593 c609719bSwdenk============ 3594 c609719bSwdenk 3595 c609719bSwdenkPorting Linux to U-Boot based systems: 3596 c609719bSwdenk--------------------------------------- 3597 c609719bSwdenk 3598 c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3599 c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3600 c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3601 c609719bSwdenkLinux :-). 3602 c609719bSwdenk 3603 a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 3604 c609719bSwdenk 3605 c609719bSwdenkJust make sure your machine specific header file (for instance 3606 c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 3607 1dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 3608 1dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 3609 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 3610 c609719bSwdenk 3611 c609719bSwdenk 3612 c609719bSwdenkConfiguring the Linux kernel: 3613 c609719bSwdenk----------------------------- 3614 c609719bSwdenk 3615 c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 3616 c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 3617 c609719bSwdenk 3618 c609719bSwdenk 3619 c609719bSwdenkBuilding a Linux Image: 3620 c609719bSwdenk----------------------- 3621 c609719bSwdenk 3622 24ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 3623 24ee89b9Swdenknot used. If you use recent kernel source, a new build target 3624 24ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 3625 24ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 3626 24ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 3627 24ee89b9Swdenk100% compatible format. 3628 c609719bSwdenk 3629 c609719bSwdenkExample: 3630 c609719bSwdenk 3631 c609719bSwdenk make TQM850L_config 3632 c609719bSwdenk make oldconfig 3633 c609719bSwdenk make dep 3634 24ee89b9Swdenk make uImage 3635 c609719bSwdenk 3636 24ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 3637 24ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 3638 24ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 3639 c609719bSwdenk 3640 24ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 3641 24ee89b9Swdenk 3642 24ee89b9Swdenk* convert the kernel into a raw binary image: 3643 24ee89b9Swdenk 3644 24ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 3645 24ee89b9Swdenk -R .note -R .comment \ 3646 24ee89b9Swdenk -S vmlinux linux.bin 3647 24ee89b9Swdenk 3648 24ee89b9Swdenk* compress the binary image: 3649 24ee89b9Swdenk 3650 24ee89b9Swdenk gzip -9 linux.bin 3651 24ee89b9Swdenk 3652 24ee89b9Swdenk* package compressed binary image for U-Boot: 3653 24ee89b9Swdenk 3654 24ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 3655 24ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 3656 24ee89b9Swdenk -d linux.bin.gz uImage 3657 24ee89b9Swdenk 3658 24ee89b9Swdenk 3659 24ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 3660 24ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 3661 24ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 3662 24ee89b9Swdenkbyte header containing information about target architecture, 3663 24ee89b9Swdenkoperating system, image type, compression method, entry points, time 3664 24ee89b9Swdenkstamp, CRC32 checksums, etc. 3665 24ee89b9Swdenk 3666 24ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 3667 24ee89b9Swdenkprint the header information, or to build new images. 3668 c609719bSwdenk 3669 c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 3670 c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 3671 c609719bSwdenkchecksum verification: 3672 c609719bSwdenk 3673 c609719bSwdenk tools/mkimage -l image 3674 c609719bSwdenk -l ==> list image header information 3675 c609719bSwdenk 3676 c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 3677 c609719bSwdenkfrom a "data file" which is used as image payload: 3678 c609719bSwdenk 3679 c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 3680 c609719bSwdenk -n name -d data_file image 3681 c609719bSwdenk -A ==> set architecture to 'arch' 3682 c609719bSwdenk -O ==> set operating system to 'os' 3683 c609719bSwdenk -T ==> set image type to 'type' 3684 c609719bSwdenk -C ==> set compression type 'comp' 3685 c609719bSwdenk -a ==> set load address to 'addr' (hex) 3686 c609719bSwdenk -e ==> set entry point to 'ep' (hex) 3687 c609719bSwdenk -n ==> set image name to 'name' 3688 c609719bSwdenk -d ==> use image data from 'datafile' 3689 c609719bSwdenk 3690 69459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 3691 69459791Swdenkaddress (0x00000000), but the entry point address depends on the 3692 69459791Swdenkkernel version: 3693 c609719bSwdenk 3694 c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 3695 24ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 3696 c609719bSwdenk 3697 c609719bSwdenkSo a typical call to build a U-Boot image would read: 3698 c609719bSwdenk 3699 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 3700 24ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 3701 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 3702 24ee89b9Swdenk > examples/uImage.TQM850L 3703 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3704 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3705 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3706 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3707 c609719bSwdenk Load Address: 0x00000000 3708 24ee89b9Swdenk Entry Point: 0x00000000 3709 c609719bSwdenk 3710 c609719bSwdenkTo verify the contents of the image (or check for corruption): 3711 c609719bSwdenk 3712 24ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 3713 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3714 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3715 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3716 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3717 c609719bSwdenk Load Address: 0x00000000 3718 24ee89b9Swdenk Entry Point: 0x00000000 3719 c609719bSwdenk 3720 c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 3721 c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3722 c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3723 c609719bSwdenkneed to be uncompressed: 3724 c609719bSwdenk 3725 a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 3726 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 3727 24ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 3728 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 3729 24ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 3730 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3731 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3732 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3733 c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3734 c609719bSwdenk Load Address: 0x00000000 3735 24ee89b9Swdenk Entry Point: 0x00000000 3736 c609719bSwdenk 3737 c609719bSwdenk 3738 c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3739 c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3740 c609719bSwdenk 3741 c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3742 c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3743 c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3744 c609719bSwdenk Image Name: Simple Ramdisk Image 3745 c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3746 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3747 c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3748 c609719bSwdenk Load Address: 0x00000000 3749 c609719bSwdenk Entry Point: 0x00000000 3750 c609719bSwdenk 3751 c609719bSwdenk 3752 c609719bSwdenkInstalling a Linux Image: 3753 c609719bSwdenk------------------------- 3754 c609719bSwdenk 3755 c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3756 c609719bSwdenkyou must convert the image to S-Record format: 3757 c609719bSwdenk 3758 c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3759 c609719bSwdenk 3760 c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3761 c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3762 c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3763 c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3764 c609719bSwdenkcommand. 3765 c609719bSwdenk 3766 c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3767 c609719bSwdenkTQM8xxL is in the first Flash bank): 3768 c609719bSwdenk 3769 c609719bSwdenk => erase 40100000 401FFFFF 3770 c609719bSwdenk 3771 c609719bSwdenk .......... done 3772 c609719bSwdenk Erased 8 sectors 3773 c609719bSwdenk 3774 c609719bSwdenk => loads 40100000 3775 c609719bSwdenk ## Ready for S-Record download ... 3776 c609719bSwdenk ~>examples/image.srec 3777 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3778 c609719bSwdenk ... 3779 c609719bSwdenk 15989 15990 15991 15992 3780 c609719bSwdenk [file transfer complete] 3781 c609719bSwdenk [connected] 3782 c609719bSwdenk ## Start Addr = 0x00000000 3783 c609719bSwdenk 3784 c609719bSwdenk 3785 c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3786 c609719bSwdenkthis includes a checksum verification so you can be sure no data 3787 c609719bSwdenkcorruption happened: 3788 c609719bSwdenk 3789 c609719bSwdenk => imi 40100000 3790 c609719bSwdenk 3791 c609719bSwdenk ## Checking Image at 40100000 ... 3792 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3793 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3794 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3795 c609719bSwdenk Load Address: 00000000 3796 c609719bSwdenk Entry Point: 0000000c 3797 c609719bSwdenk Verifying Checksum ... OK 3798 c609719bSwdenk 3799 c609719bSwdenk 3800 c609719bSwdenkBoot Linux: 3801 c609719bSwdenk----------- 3802 c609719bSwdenk 3803 c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 3804 c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 3805 c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 3806 c609719bSwdenkparameters. You can check and modify this variable using the 3807 c609719bSwdenk"printenv" and "setenv" commands: 3808 c609719bSwdenk 3809 c609719bSwdenk 3810 c609719bSwdenk => printenv bootargs 3811 c609719bSwdenk bootargs=root=/dev/ram 3812 c609719bSwdenk 3813 c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3814 c609719bSwdenk 3815 c609719bSwdenk => printenv bootargs 3816 c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3817 c609719bSwdenk 3818 c609719bSwdenk => bootm 40020000 3819 c609719bSwdenk ## Booting Linux kernel at 40020000 ... 3820 c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 3821 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3822 c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 3823 c609719bSwdenk Load Address: 00000000 3824 c609719bSwdenk Entry Point: 0000000c 3825 c609719bSwdenk Verifying Checksum ... OK 3826 c609719bSwdenk Uncompressing Kernel Image ... OK 3827 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 3828 c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3829 c609719bSwdenk time_init: decrementer frequency = 187500000/60 3830 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3831 c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 3832 c609719bSwdenk ... 3833 c609719bSwdenk 3834 11ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 3835 7152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 3836 c609719bSwdenkformat!) to the "bootm" command: 3837 c609719bSwdenk 3838 c609719bSwdenk => imi 40100000 40200000 3839 c609719bSwdenk 3840 c609719bSwdenk ## Checking Image at 40100000 ... 3841 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3842 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3843 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3844 c609719bSwdenk Load Address: 00000000 3845 c609719bSwdenk Entry Point: 0000000c 3846 c609719bSwdenk Verifying Checksum ... OK 3847 c609719bSwdenk 3848 c609719bSwdenk ## Checking Image at 40200000 ... 3849 c609719bSwdenk Image Name: Simple Ramdisk Image 3850 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3851 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3852 c609719bSwdenk Load Address: 00000000 3853 c609719bSwdenk Entry Point: 00000000 3854 c609719bSwdenk Verifying Checksum ... OK 3855 c609719bSwdenk 3856 c609719bSwdenk => bootm 40100000 40200000 3857 c609719bSwdenk ## Booting Linux kernel at 40100000 ... 3858 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3859 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3860 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3861 c609719bSwdenk Load Address: 00000000 3862 c609719bSwdenk Entry Point: 0000000c 3863 c609719bSwdenk Verifying Checksum ... OK 3864 c609719bSwdenk Uncompressing Kernel Image ... OK 3865 c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 3866 c609719bSwdenk Image Name: Simple Ramdisk Image 3867 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3868 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3869 c609719bSwdenk Load Address: 00000000 3870 c609719bSwdenk Entry Point: 00000000 3871 c609719bSwdenk Verifying Checksum ... OK 3872 c609719bSwdenk Loading Ramdisk ... OK 3873 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 3874 c609719bSwdenk Boot arguments: root=/dev/ram 3875 c609719bSwdenk time_init: decrementer frequency = 187500000/60 3876 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3877 c609719bSwdenk ... 3878 c609719bSwdenk RAMDISK: Compressed image found at block 0 3879 c609719bSwdenk VFS: Mounted root (ext2 filesystem). 3880 c609719bSwdenk 3881 c609719bSwdenk bash# 3882 c609719bSwdenk 3883 0267768eSMatthew McClintockBoot Linux and pass a flat device tree: 3884 0267768eSMatthew McClintock----------- 3885 0267768eSMatthew McClintock 3886 0267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 3887 0267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 3888 0267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 3889 0267768eSMatthew McClintockflat device tree: 3890 0267768eSMatthew McClintock 3891 0267768eSMatthew McClintock=> print oftaddr 3892 0267768eSMatthew McClintockoftaddr=0x300000 3893 0267768eSMatthew McClintock=> print oft 3894 0267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 3895 0267768eSMatthew McClintock=> tftp $oftaddr $oft 3896 0267768eSMatthew McClintockSpeed: 1000, full duplex 3897 0267768eSMatthew McClintockUsing TSEC0 device 3898 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 3899 0267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 3900 0267768eSMatthew McClintockLoad address: 0x300000 3901 0267768eSMatthew McClintockLoading: # 3902 0267768eSMatthew McClintockdone 3903 0267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 3904 0267768eSMatthew McClintock=> tftp $loadaddr $bootfile 3905 0267768eSMatthew McClintockSpeed: 1000, full duplex 3906 0267768eSMatthew McClintockUsing TSEC0 device 3907 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 3908 0267768eSMatthew McClintockFilename 'uImage'. 3909 0267768eSMatthew McClintockLoad address: 0x200000 3910 0267768eSMatthew McClintockLoading:############ 3911 0267768eSMatthew McClintockdone 3912 0267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 3913 0267768eSMatthew McClintock=> print loadaddr 3914 0267768eSMatthew McClintockloadaddr=200000 3915 0267768eSMatthew McClintock=> print oftaddr 3916 0267768eSMatthew McClintockoftaddr=0x300000 3917 0267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 3918 0267768eSMatthew McClintock## Booting image at 00200000 ... 3919 0267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 3920 0267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 3921 0267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 3922 0267768eSMatthew McClintock Load Address: 00000000 3923 0267768eSMatthew McClintock Entry Point: 00000000 3924 0267768eSMatthew McClintock Verifying Checksum ... OK 3925 0267768eSMatthew McClintock Uncompressing Kernel Image ... OK 3926 0267768eSMatthew McClintockBooting using flat device tree at 0x300000 3927 0267768eSMatthew McClintockUsing MPC85xx ADS machine description 3928 0267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 3929 0267768eSMatthew McClintock[snip] 3930 0267768eSMatthew McClintock 3931 0267768eSMatthew McClintock 3932 6069ff26SwdenkMore About U-Boot Image Types: 3933 6069ff26Swdenk------------------------------ 3934 6069ff26Swdenk 3935 6069ff26SwdenkU-Boot supports the following image types: 3936 6069ff26Swdenk 3937 6069ff26Swdenk "Standalone Programs" are directly runnable in the environment 3938 6069ff26Swdenk provided by U-Boot; it is expected that (if they behave 3939 6069ff26Swdenk well) you can continue to work in U-Boot after return from 3940 6069ff26Swdenk the Standalone Program. 3941 6069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 3942 6069ff26Swdenk will take over control completely. Usually these programs 3943 6069ff26Swdenk will install their own set of exception handlers, device 3944 6069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 3945 6069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 3946 6069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 3947 6069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 3948 6069ff26Swdenk being started. 3949 6069ff26Swdenk "Multi-File Images" contain several images, typically an OS 3950 6069ff26Swdenk (Linux) kernel image and one or more data images like 3951 6069ff26Swdenk RAMDisks. This construct is useful for instance when you want 3952 6069ff26Swdenk to boot over the network using BOOTP etc., where the boot 3953 6069ff26Swdenk server provides just a single image file, but you want to get 3954 6069ff26Swdenk for instance an OS kernel and a RAMDisk image. 3955 6069ff26Swdenk 3956 6069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 3957 6069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 3958 6069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 3959 6069ff26Swdenk Immediately after the terminating 0 follow the images, one by 3960 6069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 3961 6069ff26Swdenk a multiple of 4 bytes). 3962 6069ff26Swdenk 3963 6069ff26Swdenk "Firmware Images" are binary images containing firmware (like 3964 6069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 3965 6069ff26Swdenk flash memory. 3966 6069ff26Swdenk 3967 6069ff26Swdenk "Script files" are command sequences that will be executed by 3968 6069ff26Swdenk U-Boot's command interpreter; this feature is especially 3969 6069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 3970 6069ff26Swdenk as command interpreter. 3971 6069ff26Swdenk 3972 c609719bSwdenk 3973 c609719bSwdenkStandalone HOWTO: 3974 c609719bSwdenk================= 3975 c609719bSwdenk 3976 c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 3977 c609719bSwdenkrun "standalone" applications, which can use some resources of 3978 c609719bSwdenkU-Boot like console I/O functions or interrupt services. 3979 c609719bSwdenk 3980 c609719bSwdenkTwo simple examples are included with the sources: 3981 c609719bSwdenk 3982 c609719bSwdenk"Hello World" Demo: 3983 c609719bSwdenk------------------- 3984 c609719bSwdenk 3985 c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 3986 c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 3987 c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 3988 c609719bSwdenklike that: 3989 c609719bSwdenk 3990 c609719bSwdenk => loads 3991 c609719bSwdenk ## Ready for S-Record download ... 3992 c609719bSwdenk ~>examples/hello_world.srec 3993 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3994 c609719bSwdenk [file transfer complete] 3995 c609719bSwdenk [connected] 3996 c609719bSwdenk ## Start Addr = 0x00040004 3997 c609719bSwdenk 3998 c609719bSwdenk => go 40004 Hello World! This is a test. 3999 c609719bSwdenk ## Starting application at 0x00040004 ... 4000 c609719bSwdenk Hello World 4001 c609719bSwdenk argc = 7 4002 c609719bSwdenk argv[0] = "40004" 4003 c609719bSwdenk argv[1] = "Hello" 4004 c609719bSwdenk argv[2] = "World!" 4005 c609719bSwdenk argv[3] = "This" 4006 c609719bSwdenk argv[4] = "is" 4007 c609719bSwdenk argv[5] = "a" 4008 c609719bSwdenk argv[6] = "test." 4009 c609719bSwdenk argv[7] = "<NULL>" 4010 c609719bSwdenk Hit any key to exit ... 4011 c609719bSwdenk 4012 c609719bSwdenk ## Application terminated, rc = 0x0 4013 c609719bSwdenk 4014 c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4015 c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4016 c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4017 c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4018 c609719bSwdenkcharacter, but this is just a demo program. The application can be 4019 c609719bSwdenkcontrolled by the following keys: 4020 c609719bSwdenk 4021 c609719bSwdenk ? - print current values og the CPM Timer registers 4022 c609719bSwdenk b - enable interrupts and start timer 4023 c609719bSwdenk e - stop timer and disable interrupts 4024 c609719bSwdenk q - quit application 4025 c609719bSwdenk 4026 c609719bSwdenk => loads 4027 c609719bSwdenk ## Ready for S-Record download ... 4028 c609719bSwdenk ~>examples/timer.srec 4029 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4030 c609719bSwdenk [file transfer complete] 4031 c609719bSwdenk [connected] 4032 c609719bSwdenk ## Start Addr = 0x00040004 4033 c609719bSwdenk 4034 c609719bSwdenk => go 40004 4035 c609719bSwdenk ## Starting application at 0x00040004 ... 4036 c609719bSwdenk TIMERS=0xfff00980 4037 c609719bSwdenk Using timer 1 4038 c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4039 c609719bSwdenk 4040 c609719bSwdenkHit 'b': 4041 c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4042 c609719bSwdenk Enabling timer 4043 c609719bSwdenkHit '?': 4044 c609719bSwdenk [q, b, e, ?] ........ 4045 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4046 c609719bSwdenkHit '?': 4047 c609719bSwdenk [q, b, e, ?] . 4048 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4049 c609719bSwdenkHit '?': 4050 c609719bSwdenk [q, b, e, ?] . 4051 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4052 c609719bSwdenkHit '?': 4053 c609719bSwdenk [q, b, e, ?] . 4054 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4055 c609719bSwdenkHit 'e': 4056 c609719bSwdenk [q, b, e, ?] ...Stopping timer 4057 c609719bSwdenkHit 'q': 4058 c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4059 c609719bSwdenk 4060 c609719bSwdenk 4061 85ec0bccSwdenkMinicom warning: 4062 85ec0bccSwdenk================ 4063 85ec0bccSwdenk 4064 7152b1d0SwdenkOver time, many people have reported problems when trying to use the 4065 85ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 4066 85ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4067 f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 4068 85ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4069 85ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 4070 85ec0bccSwdenk 4071 52f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 4072 52f52c14Swdenkconfiguration to your "File transfer protocols" section: 4073 52f52c14Swdenk 4074 52f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 4075 52f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 4076 52f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 4077 52f52c14Swdenk 4078 52f52c14Swdenk 4079 c609719bSwdenkNetBSD Notes: 4080 c609719bSwdenk============= 4081 c609719bSwdenk 4082 c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4083 c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4084 c609719bSwdenk 4085 c609719bSwdenkBuilding requires a cross environment; it is known to work on 4086 c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4087 c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4088 c609719bSwdenkNote that the cross-powerpc package does not install include files; 4089 c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4090 c609719bSwdenkmissing. This file has to be installed and patched manually: 4091 c609719bSwdenk 4092 c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4093 c609719bSwdenk # mkdir powerpc 4094 c609719bSwdenk # ln -s powerpc machine 4095 c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4096 c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4097 c609719bSwdenk 4098 c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4099 c609719bSwdenkand U-Boot include files. 4100 c609719bSwdenk 4101 c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4102 c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4103 c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4104 c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 4105 2a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4106 c609719bSwdenk 4107 c609719bSwdenk 4108 c609719bSwdenkImplementation Internals: 4109 c609719bSwdenk========================= 4110 c609719bSwdenk 4111 c609719bSwdenkThe following is not intended to be a complete description of every 4112 c609719bSwdenkimplementation detail. However, it should help to understand the 4113 c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4114 c609719bSwdenkhardware. 4115 c609719bSwdenk 4116 c609719bSwdenk 4117 c609719bSwdenkInitial Stack, Global Data: 4118 c609719bSwdenk--------------------------- 4119 c609719bSwdenk 4120 c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4121 c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4122 c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4123 c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4124 c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4125 c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4126 c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4127 c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4128 c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4129 c609719bSwdenklocked as (mis-) used as memory, etc. 4130 c609719bSwdenk 4131 7152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 4132 0668236bSWolfgang Denk U-Boot mailing list: 4133 43d9616cSwdenk 4134 43d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 4135 43d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 4136 43d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 4137 43d9616cSwdenk ... 4138 43d9616cSwdenk 4139 43d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 4140 43d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 4141 43d9616cSwdenk require any physical RAM backing up the cache. The cleverness 4142 43d9616cSwdenk is that the cache is being used as a temporary supply of 4143 43d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 4144 11ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 4145 43d9616cSwdenk can see how this works by studying the cache architecture and 4146 43d9616cSwdenk operation in the architecture and processor-specific manuals. 4147 43d9616cSwdenk 4148 43d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 4149 43d9616cSwdenk is another option for the system designer to use as an 4150 11ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 4151 43d9616cSwdenk option should work for you. Using CS 4 should be fine if your 4152 43d9616cSwdenk board designers haven't used it for something that would 4153 43d9616cSwdenk cause you grief during the initial boot! It is frequently not 4154 43d9616cSwdenk used. 4155 43d9616cSwdenk 4156 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 4157 43d9616cSwdenk with your processor/board/system design. The default value 4158 43d9616cSwdenk you will find in any recent u-boot distribution in 4159 8a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 4160 43d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 4161 43d9616cSwdenk it above 400_0000. Just make sure your board has no resources 4162 43d9616cSwdenk that are supposed to respond to that address! That code in 4163 43d9616cSwdenk start.S has been around a while and should work as is when 4164 43d9616cSwdenk you get the config right. 4165 43d9616cSwdenk 4166 43d9616cSwdenk -Chris Hallinan 4167 43d9616cSwdenk DS4.COM, Inc. 4168 43d9616cSwdenk 4169 c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4170 c609719bSwdenkcode for the initialization procedures: 4171 c609719bSwdenk 4172 c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4173 c609719bSwdenk to write it. 4174 c609719bSwdenk 4175 11ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4176 c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 4177 7152b1d0Swdenk zation is performed later (when relocating to RAM). 4178 c609719bSwdenk 4179 c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4180 c609719bSwdenk that. 4181 c609719bSwdenk 4182 c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4183 c609719bSwdenknormal global data to share information beween the code. But it 4184 c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4185 c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4186 c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4187 c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4188 c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4189 c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4190 c609719bSwdenkreserve for this purpose. 4191 c609719bSwdenk 4192 7152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4193 c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4194 c609719bSwdenkGCC's implementation. 4195 c609719bSwdenk 4196 c609719bSwdenkFor PowerPC, the following registers have specific use: 4197 c609719bSwdenk R1: stack pointer 4198 e7670f6cSWolfgang Denk R2: reserved for system use 4199 c609719bSwdenk R3-R4: parameter passing and return values 4200 c609719bSwdenk R5-R10: parameter passing 4201 c609719bSwdenk R13: small data area pointer 4202 c609719bSwdenk R30: GOT pointer 4203 c609719bSwdenk R31: frame pointer 4204 c609719bSwdenk 4205 e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4206 e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4207 e6bee808SJoakim Tjernlund going back and forth between asm and C) 4208 c609719bSwdenk 4209 e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4210 c609719bSwdenk 4211 c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4212 c609719bSwdenk address of the global data structure is known at compile time), 4213 c609719bSwdenk but it turned out that reserving a register results in somewhat 4214 c609719bSwdenk smaller code - although the code savings are not that big (on 4215 c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4216 c609719bSwdenk 624 text + 127 data). 4217 c609719bSwdenk 4218 c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 4219 4c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 4220 4c58eb55SMike Frysinger 4221 c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 4222 4c58eb55SMike Frysinger 4223 c609719bSwdenkOn ARM, the following registers are used: 4224 c609719bSwdenk 4225 c609719bSwdenk R0: function argument word/integer result 4226 c609719bSwdenk R1-R3: function argument word 4227 c609719bSwdenk R9: GOT pointer 4228 c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4229 c609719bSwdenk R11: argument (frame) pointer 4230 c609719bSwdenk R12: temporary workspace 4231 c609719bSwdenk R13: stack pointer 4232 c609719bSwdenk R14: link register 4233 c609719bSwdenk R15: program counter 4234 c609719bSwdenk 4235 c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4236 c609719bSwdenk 4237 0df01fd3SThomas ChouOn Nios II, the ABI is documented here: 4238 0df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 4239 0df01fd3SThomas Chou 4240 0df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 4241 0df01fd3SThomas Chou 4242 0df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 4243 0df01fd3SThomas Chou to access small data sections, so gp is free. 4244 0df01fd3SThomas Chou 4245 d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4246 d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4247 c609719bSwdenk 4248 c609719bSwdenkMemory Management: 4249 c609719bSwdenk------------------ 4250 c609719bSwdenk 4251 c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4252 c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4253 c609719bSwdenk 4254 c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4255 c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4256 c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4257 c609719bSwdenkphysical memory banks. 4258 c609719bSwdenk 4259 c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4260 c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4261 c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4262 c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 4263 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4264 c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4265 c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4266 c609719bSwdenk 4267 c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4268 c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4269 c609719bSwdenk 4270 c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4271 c609719bSwdenkthis: 4272 c609719bSwdenk 4273 c609719bSwdenk 0x0000 0000 Exception Vector code 4274 c609719bSwdenk : 4275 c609719bSwdenk 0x0000 1FFF 4276 c609719bSwdenk 0x0000 2000 Free for Application Use 4277 c609719bSwdenk : 4278 c609719bSwdenk : 4279 c609719bSwdenk 4280 c609719bSwdenk : 4281 c609719bSwdenk : 4282 c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4283 c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4284 c609719bSwdenk 0x00FC 0000 Malloc Arena 4285 c609719bSwdenk : 4286 c609719bSwdenk 0x00FD FFFF 4287 c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4288 c609719bSwdenk ... eventually: LCD or video framebuffer 4289 c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4290 c609719bSwdenk 0x00FF FFFF [End of RAM] 4291 c609719bSwdenk 4292 c609719bSwdenk 4293 c609719bSwdenkSystem Initialization: 4294 c609719bSwdenk---------------------- 4295 c609719bSwdenk 4296 c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 4297 11ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4298 c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 4299 7152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4300 c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4301 c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4302 c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4303 c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4304 c609719bSwdenkthe caches and the SIU. 4305 c609719bSwdenk 4306 c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4307 c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4308 c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4309 c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4310 c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4311 c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4312 c609719bSwdenkbanks. 4313 c609719bSwdenk 4314 c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 4315 7152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4316 c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4317 c609719bSwdenk0x00000000, with any additional banks following immediately to create 4318 c609719bSwdenkcontiguous memory starting from 0. 4319 c609719bSwdenk 4320 c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4321 c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4322 c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4323 c609719bSwdenkpages, and the final stack is set up. 4324 c609719bSwdenk 4325 c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4326 c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4327 c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4328 c609719bSwdenknew address in RAM. 4329 c609719bSwdenk 4330 c609719bSwdenk 4331 c609719bSwdenkU-Boot Porting Guide: 4332 c609719bSwdenk---------------------- 4333 c609719bSwdenk 4334 c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 4335 6aff3115Swdenklist, October 2002] 4336 c609719bSwdenk 4337 c609719bSwdenk 4338 c609719bSwdenkint main(int argc, char *argv[]) 4339 c609719bSwdenk{ 4340 c609719bSwdenk sighandler_t no_more_time; 4341 c609719bSwdenk 4342 c609719bSwdenk signal(SIGALRM, no_more_time); 4343 c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4344 c609719bSwdenk 4345 c609719bSwdenk if (available_money > available_manpower) { 4346 6c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4347 c609719bSwdenk return 0; 4348 c609719bSwdenk } 4349 c609719bSwdenk 4350 c609719bSwdenk Download latest U-Boot source; 4351 c609719bSwdenk 4352 0668236bSWolfgang Denk Subscribe to u-boot mailing list; 4353 6aff3115Swdenk 4354 6c3fef28SJerry Van Baren if (clueless) 4355 c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4356 c609719bSwdenk 4357 c609719bSwdenk while (learning) { 4358 c609719bSwdenk Read the README file in the top level directory; 4359 7cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 4360 6c3fef28SJerry Van Baren Read applicable doc/*.README; 4361 c609719bSwdenk Read the source, Luke; 4362 6c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4363 c609719bSwdenk } 4364 c609719bSwdenk 4365 6c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 4366 6c3fef28SJerry Van Baren Buy a BDI3000; 4367 6c3fef28SJerry Van Baren else 4368 c609719bSwdenk Add a lot of aggravation and time; 4369 c609719bSwdenk 4370 6c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 4371 6c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 4372 6c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 4373 6c3fef28SJerry Van Baren } else { 4374 c609719bSwdenk Create your own board support subdirectory; 4375 6c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 4376 6c3fef28SJerry Van Baren } 4377 6c3fef28SJerry Van Baren Edit new board/<myboard> files 4378 6c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4379 c609719bSwdenk 4380 6c3fef28SJerry Van Baren while (!accepted) { 4381 c609719bSwdenk while (!running) { 4382 c609719bSwdenk do { 4383 c609719bSwdenk Add / modify source code; 4384 c609719bSwdenk } until (compiles); 4385 c609719bSwdenk Debug; 4386 c609719bSwdenk if (clueless) 4387 c609719bSwdenk email("Hi, I am having problems..."); 4388 c609719bSwdenk } 4389 6c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 4390 6c3fef28SJerry Van Baren if (reasonable critiques) 4391 6c3fef28SJerry Van Baren Incorporate improvements from email list code review; 4392 6c3fef28SJerry Van Baren else 4393 6c3fef28SJerry Van Baren Defend code as written; 4394 6c3fef28SJerry Van Baren } 4395 c609719bSwdenk 4396 c609719bSwdenk return 0; 4397 c609719bSwdenk} 4398 c609719bSwdenk 4399 c609719bSwdenkvoid no_more_time (int sig) 4400 c609719bSwdenk{ 4401 c609719bSwdenk hire_a_guru(); 4402 c609719bSwdenk} 4403 c609719bSwdenk 4404 c609719bSwdenk 4405 c609719bSwdenkCoding Standards: 4406 c609719bSwdenk----------------- 4407 c609719bSwdenk 4408 c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 4409 2c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 4410 2c051651SDetlev Zundel"scripts/Lindent" in your Linux kernel source directory. In sources 4411 2c051651SDetlev Zundeloriginating from U-Boot a style corresponding to "Lindent -pcs" (adding 4412 2c051651SDetlev Zundelspaces before parameters to function calls) is actually used. 4413 c609719bSwdenk 4414 2c051651SDetlev ZundelSource files originating from a different project (for example the 4415 2c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 4416 2c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 4417 2c051651SDetlev Zundelsources. 4418 2c051651SDetlev Zundel 4419 2c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 4420 2c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 4421 2c051651SDetlev Zundelin your code. 4422 c609719bSwdenk 4423 c178d3daSwdenkPlease also stick to the following formatting rules: 4424 180d3f74Swdenk- remove any trailing white space 4425 180d3f74Swdenk- use TAB characters for indentation, not spaces 4426 180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 4427 180d3f74Swdenk- do not add more than 2 empty lines to source files 4428 180d3f74Swdenk- do not add trailing empty lines to source files 4429 180d3f74Swdenk 4430 c609719bSwdenkSubmissions which do not conform to the standards may be returned 4431 c609719bSwdenkwith a request to reformat the changes. 4432 c609719bSwdenk 4433 c609719bSwdenk 4434 c609719bSwdenkSubmitting Patches: 4435 c609719bSwdenk------------------- 4436 c609719bSwdenk 4437 c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4438 c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4439 c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4440 c609719bSwdenk 4441 0d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4442 218ca724SWolfgang Denk 4443 0668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 4444 0668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 4445 0668236bSWolfgang Denk 4446 c609719bSwdenkWhen you send a patch, please include the following information with 4447 c609719bSwdenkit: 4448 c609719bSwdenk 4449 c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4450 c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4451 c609719bSwdenk patch actually fixes something. 4452 c609719bSwdenk 4453 c609719bSwdenk* For new features: a description of the feature and your 4454 c609719bSwdenk implementation. 4455 c609719bSwdenk 4456 c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4457 c609719bSwdenk 4458 c609719bSwdenk* For major contributions, your entry to the CREDITS file 4459 c609719bSwdenk 4460 c609719bSwdenk* When you add support for a new board, don't forget to add this 4461 c609719bSwdenk board to the MAKEALL script, too. 4462 c609719bSwdenk 4463 c609719bSwdenk* If your patch adds new configuration options, don't forget to 4464 c609719bSwdenk document these in the README file. 4465 c609719bSwdenk 4466 218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4467 218ca724SWolfgang Denk recommended) you can easily generate the patch using the 4468 218ca724SWolfgang Denk "git-format-patch". If you then use "git-send-email" to send it to 4469 218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4470 218ca724SWolfgang Denk with some other mail clients. 4471 c609719bSwdenk 4472 218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4473 218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4474 218ca724SWolfgang Denk GNU diff. 4475 6dff5529Swdenk 4476 218ca724SWolfgang Denk The current directory when running this command shall be the parent 4477 218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4478 218ca724SWolfgang Denk your patch includes sufficient directory information for the 4479 218ca724SWolfgang Denk affected files). 4480 218ca724SWolfgang Denk 4481 218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4482 218ca724SWolfgang Denk and compressed attachments must not be used. 4483 c609719bSwdenk 4484 52f52c14Swdenk* If one logical set of modifications affects or creates several 4485 52f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 4486 52f52c14Swdenk 4487 52f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 4488 52f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 4489 52f52c14Swdenk 4490 52f52c14Swdenk 4491 c609719bSwdenkNotes: 4492 c609719bSwdenk 4493 c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4494 c609719bSwdenk source tree and make sure that no errors or warnings are reported 4495 c609719bSwdenk for any of the boards. 4496 c609719bSwdenk 4497 c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4498 c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4499 c609719bSwdenk returned with a request to re-formatting / split it. 4500 c609719bSwdenk 4501 c609719bSwdenk* If you modify existing code, make sure that your new code does not 4502 c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4503 c609719bSwdenk When adding new features, these should compile conditionally only 4504 c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4505 c609719bSwdenk disabled must not need more memory than the old code without your 4506 c609719bSwdenk modification. 4507 90dc6704Swdenk 4508 0668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 4509 0668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 4510 0668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 4511 0668236bSWolfgang Denk bigger than the size limit should be avoided. 4512