1 c609719bSwdenk# 2 218ca724SWolfgang Denk# (C) Copyright 2000 - 2008 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 93f19cc0SwdenkU-Boot uses a 3 level version number containing a version, a 130 93f19cc0Swdenksub-version, and a patchlevel: "U-Boot-2.34.5" means version "2", 131 93f19cc0Swdenksub-version "34", and patchlevel "4". 132 93f19cc0Swdenk 133 93f19cc0SwdenkThe patchlevel is used to indicate certain stages of development 134 93f19cc0Swdenkbetween released versions, i. e. officially released versions of 135 93f19cc0SwdenkU-Boot will always have a patchlevel of "0". 136 93f19cc0Swdenk 137 93f19cc0Swdenk 138 c609719bSwdenkDirectory Hierarchy: 139 c609719bSwdenk==================== 140 c609719bSwdenk 141 7152b1d0Swdenk- board Board dependent files 142 7152b1d0Swdenk- common Misc architecture independent functions 143 c609719bSwdenk- cpu CPU specific files 144 983fda83Swdenk - 74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 145 11dadd54Swdenk - arm720t Files specific to ARM 720 CPUs 146 11dadd54Swdenk - arm920t Files specific to ARM 920 CPUs 147 a85f9f21Swdenk - at91rm9200 Files specific to Atmel AT91RM9200 CPU 148 983fda83Swdenk - imx Files specific to Freescale MC9328 i.MX CPUs 149 1d9f4105Swdenk - s3c24x0 Files specific to Samsung S3C24X0 CPUs 150 11dadd54Swdenk - arm925t Files specific to ARM 925 CPUs 151 11dadd54Swdenk - arm926ejs Files specific to ARM 926 CPUs 152 8ed96046Swdenk - arm1136 Files specific to ARM 1136 CPUs 153 72a087e0SWolfgang Denk - at32ap Files specific to Atmel AVR32 AP CPUs 154 adbfeeb7SMike Frysinger - blackfin Files specific to Analog Devices Blackfin CPUs 155 11dadd54Swdenk - i386 Files specific to i386 CPUs 156 11dadd54Swdenk - ixp Files specific to Intel XScale IXP CPUs 157 b330990cSDaniel Hellstrom - leon2 Files specific to Gaisler LEON2 SPARC CPU 158 1e9a164eSDaniel Hellstrom - leon3 Files specific to Gaisler LEON3 SPARC CPU 159 983fda83Swdenk - mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 160 1552af70STsiChungLiew - mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 161 8e585f02STsiChung Liew - mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 162 8ae158cdSTsiChungLiew - mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 163 57a12720STsiChungLiew - mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 164 11dadd54Swdenk - mips Files specific to MIPS CPUs 165 983fda83Swdenk - mpc5xx Files specific to Freescale MPC5xx CPUs 166 983fda83Swdenk - mpc5xxx Files specific to Freescale MPC5xxx CPUs 167 983fda83Swdenk - mpc8xx Files specific to Freescale MPC8xx CPUs 168 983fda83Swdenk - mpc8220 Files specific to Freescale MPC8220 CPUs 169 983fda83Swdenk - mpc824x Files specific to Freescale MPC824x CPUs 170 983fda83Swdenk - mpc8260 Files specific to Freescale MPC8260 CPUs 171 983fda83Swdenk - mpc85xx Files specific to Freescale MPC85xx CPUs 172 11dadd54Swdenk - nios Files specific to Altera NIOS CPUs 173 5c952cf0Swdenk - nios2 Files specific to Altera Nios-II CPUs 174 0c8721a4SWolfgang Denk - ppc4xx Files specific to AMCC PowerPC 4xx CPUs 175 11dadd54Swdenk - pxa Files specific to Intel XScale PXA CPUs 176 11dadd54Swdenk - s3c44b0 Files specific to Samsung S3C44B0 CPUs 177 11dadd54Swdenk - sa1100 Files specific to Intel StrongARM SA1100 CPUs 178 c609719bSwdenk- disk Code for disk drive partition handling 179 c609719bSwdenk- doc Documentation (don't expect too much) 180 7152b1d0Swdenk- drivers Commonly used device drivers 181 c609719bSwdenk- dtt Digital Thermometer and Thermostat drivers 182 c609719bSwdenk- examples Example code for standalone applications, etc. 183 c609719bSwdenk- include Header Files 184 11dadd54Swdenk- lib_arm Files generic to ARM architecture 185 7b64fef3SWolfgang Denk- lib_avr32 Files generic to AVR32 architecture 186 adbfeeb7SMike Frysinger- lib_blackfin Files generic to Blackfin architecture 187 11dadd54Swdenk- lib_generic Files generic to all architectures 188 11dadd54Swdenk- lib_i386 Files generic to i386 architecture 189 11dadd54Swdenk- lib_m68k Files generic to m68k architecture 190 11dadd54Swdenk- lib_mips Files generic to MIPS architecture 191 11dadd54Swdenk- lib_nios Files generic to NIOS architecture 192 11dadd54Swdenk- lib_ppc Files generic to PowerPC architecture 193 c2f02da2SDaniel Hellstrom- lib_sparc Files generic to SPARC architecture 194 213bf8c8SGerald Van Baren- libfdt Library files to support flattened device trees 195 c609719bSwdenk- net Networking code 196 c609719bSwdenk- post Power On Self Test 197 c609719bSwdenk- rtc Real Time Clock drivers 198 c609719bSwdenk- tools Tools to build S-Record or U-Boot images, etc. 199 c609719bSwdenk 200 c609719bSwdenkSoftware Configuration: 201 c609719bSwdenk======================= 202 c609719bSwdenk 203 c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 204 c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 205 c609719bSwdenk 206 c609719bSwdenkThere are two classes of configuration variables: 207 c609719bSwdenk 208 c609719bSwdenk* Configuration _OPTIONS_: 209 c609719bSwdenk These are selectable by the user and have names beginning with 210 c609719bSwdenk "CONFIG_". 211 c609719bSwdenk 212 c609719bSwdenk* Configuration _SETTINGS_: 213 c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 214 c609719bSwdenk you don't know what you're doing; they have names beginning with 215 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 216 c609719bSwdenk 217 c609719bSwdenkLater we will add a configuration tool - probably similar to or even 218 c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 219 c609719bSwdenkdo the configuration by hand, which means creating some symbolic 220 c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 221 c609719bSwdenkas an example here. 222 c609719bSwdenk 223 c609719bSwdenk 224 c609719bSwdenkSelection of Processor Architecture and Board Type: 225 c609719bSwdenk--------------------------------------------------- 226 c609719bSwdenk 227 c609719bSwdenkFor all supported boards there are ready-to-use default 228 c609719bSwdenkconfigurations available; just type "make <board_name>_config". 229 c609719bSwdenk 230 c609719bSwdenkExample: For a TQM823L module type: 231 c609719bSwdenk 232 c609719bSwdenk cd u-boot 233 c609719bSwdenk make TQM823L_config 234 c609719bSwdenk 235 11ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 236 c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 237 c609719bSwdenkdirectory according to the instructions in cogent/README. 238 c609719bSwdenk 239 c609719bSwdenk 240 c609719bSwdenkConfiguration Options: 241 c609719bSwdenk---------------------- 242 c609719bSwdenk 243 c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 244 c609719bSwdenksuch information is kept in a configuration file 245 c609719bSwdenk"include/configs/<board_name>.h". 246 c609719bSwdenk 247 c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 248 c609719bSwdenk"include/configs/TQM823L.h". 249 c609719bSwdenk 250 c609719bSwdenk 251 7f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 252 7f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 253 7f6c2cbcSwdenkbuild a config tool - later. 254 7f6c2cbcSwdenk 255 7f6c2cbcSwdenk 256 c609719bSwdenkThe following options need to be configured: 257 c609719bSwdenk 258 2628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 259 c609719bSwdenk 260 2628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 261 6ccec449SWolfgang Denk 262 6ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 263 09ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 264 c609719bSwdenk 265 c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 266 c609719bSwdenk Define exactly one of 267 c609719bSwdenk CONFIG_CMA286_60_OLD 268 c609719bSwdenk--- FIXME --- not tested yet: 269 c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 270 c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 271 c609719bSwdenk 272 c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 273 c609719bSwdenk Define exactly one of 274 c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 275 c609719bSwdenk 276 c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 277 c609719bSwdenk Define one or more of 278 c609719bSwdenk CONFIG_CMA302 279 c609719bSwdenk 280 c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 281 c609719bSwdenk Define one or more of 282 c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 283 11ccc33fSMarcel Ziswiler the LCD display every second with 284 c609719bSwdenk a "rotator" |\-/|\-/ 285 c609719bSwdenk 286 2535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 287 2535d602Swdenk CONFIG_ADSTYPE 288 2535d602Swdenk Possible values are: 289 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 290 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 291 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 292 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 293 2535d602Swdenk 294 c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 295 c609719bSwdenk Define exactly one of 296 c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 297 c609719bSwdenk 298 11ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 299 66ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 300 66ca92a5Swdenk get_gclk_freq() cannot work 301 5da627a4Swdenk e.g. if there is no 32KHz 302 5da627a4Swdenk reference PIT/RTC clock 303 66ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 304 66ca92a5Swdenk or XTAL/EXTAL) 305 c609719bSwdenk 306 66ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 307 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 308 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 309 66ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 310 75d1ea7fSwdenk See doc/README.MPC866 311 75d1ea7fSwdenk 312 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 313 75d1ea7fSwdenk 314 75d1ea7fSwdenk Define this to measure the actual CPU clock instead 315 75d1ea7fSwdenk of relying on the correctness of the configured 316 75d1ea7fSwdenk values. Mostly useful for board bringup to make sure 317 75d1ea7fSwdenk the PLL is locked at the intended frequency. Note 318 75d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 319 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 320 75d1ea7fSwdenk 321 506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 322 506f3918SHeiko Schocher 323 506f3918SHeiko Schocher Define this option if you want to enable the 324 506f3918SHeiko Schocher ICache only when Code runs from RAM. 325 506f3918SHeiko Schocher 326 0b953ffcSMarkus Klotzbuecher- Intel Monahans options: 327 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 328 0b953ffcSMarkus Klotzbuecher 329 0b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 330 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 331 0b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 332 0b953ffcSMarkus Klotzbuecher 333 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 334 0b953ffcSMarkus Klotzbuecher 335 0b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 336 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 337 0b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 338 0b953ffcSMarkus Klotzbuecher by this value. 339 0b953ffcSMarkus Klotzbuecher 340 5da627a4Swdenk- Linux Kernel Interface: 341 c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 342 c609719bSwdenk 343 c609719bSwdenk U-Boot stores all clock information in Hz 344 c609719bSwdenk internally. For binary compatibility with older Linux 345 c609719bSwdenk kernels (which expect the clocks passed in the 346 c609719bSwdenk bd_info data to be in MHz) the environment variable 347 c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 348 c609719bSwdenk converts clock data to MHZ before passing it to the 349 c609719bSwdenk Linux kernel. 350 c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 351 c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 352 c609719bSwdenk default environment. 353 c609719bSwdenk 354 5da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 355 5da627a4Swdenk 356 11ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 357 5da627a4Swdenk expect it to be in bytes, others in MB. 358 5da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 359 5da627a4Swdenk 360 fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 361 f57f70aaSWolfgang Denk 362 f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 363 213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 364 213bf8c8SGerald Van Baren concepts). 365 213bf8c8SGerald Van Baren 366 213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 367 213bf8c8SGerald Van Baren * New libfdt-based support 368 213bf8c8SGerald Van Baren * Adds the "fdt" command 369 3bb342fcSKim Phillips * The bootm command automatically updates the fdt 370 213bf8c8SGerald Van Baren 371 f57f70aaSWolfgang Denk OF_CPU - The proper name of the cpus node. 372 c2871f03SKumar Gala OF_SOC - The proper name of the soc node. 373 f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 374 c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 375 f57f70aaSWolfgang Denk 376 11ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 377 11ccc33fSMarcel Ziswiler addresses 378 3bb342fcSKim Phillips 379 4e253137SKumar Gala CONFIG_OF_BOARD_SETUP 380 4e253137SKumar Gala 381 4e253137SKumar Gala Board code has addition modification that it wants to make 382 4e253137SKumar Gala to the flat device tree before handing it off to the kernel 383 6705d81eSwdenk 384 0267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 385 0267768eSMatthew McClintock 386 11ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 387 0267768eSMatthew McClintock param header, the default value is zero if undefined. 388 0267768eSMatthew McClintock 389 0b2f4ecaSNiklaus Giger- vxWorks boot parameters: 390 0b2f4ecaSNiklaus Giger 391 0b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 392 0b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 393 0b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 394 0b2f4ecaSNiklaus Giger 395 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 396 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 397 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 398 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 399 0b2f4ecaSNiklaus Giger 400 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 401 0b2f4ecaSNiklaus Giger 402 0b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 403 0b2f4ecaSNiklaus Giger 404 0b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 405 0b2f4ecaSNiklaus Giger the defaults discussed just above. 406 0b2f4ecaSNiklaus Giger 407 6705d81eSwdenk- Serial Ports: 408 48d0192fSAndreas Engel CONFIG_PL010_SERIAL 409 6705d81eSwdenk 410 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 411 6705d81eSwdenk 412 48d0192fSAndreas Engel CONFIG_PL011_SERIAL 413 6705d81eSwdenk 414 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 415 6705d81eSwdenk 416 6705d81eSwdenk CONFIG_PL011_CLOCK 417 6705d81eSwdenk 418 6705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 419 6705d81eSwdenk the clock speed of the UARTs. 420 6705d81eSwdenk 421 6705d81eSwdenk CONFIG_PL01x_PORTS 422 6705d81eSwdenk 423 6705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 424 6705d81eSwdenk define this to a list of base addresses for each (supported) 425 6705d81eSwdenk port. See e.g. include/configs/versatile.h 426 6705d81eSwdenk 427 6705d81eSwdenk 428 c609719bSwdenk- Console Interface: 429 c609719bSwdenk Depending on board, define exactly one serial port 430 c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 431 c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 432 c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 433 c609719bSwdenk 434 c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 435 c609719bSwdenk port routines must be defined elsewhere 436 c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 437 c609719bSwdenk 438 c609719bSwdenk CONFIG_CFB_CONSOLE 439 c609719bSwdenk Enables console device for a color framebuffer. Needs following 440 c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 441 c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 442 c609719bSwdenk (default big endian) 443 c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 444 c609719bSwdenk rectangle fill 445 c609719bSwdenk (cf. smiLynxEM) 446 c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 447 c609719bSwdenk bit-blit (cf. smiLynxEM) 448 c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 449 c609719bSwdenk (cols=pitch) 450 c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 451 c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 452 c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 453 c609719bSwdenk (0-5, cf. cfb_console.c) 454 c609719bSwdenk VIDEO_FB_ADRS framebuffer address 455 c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 456 c609719bSwdenk (i.e. i8042_kbd_init()) 457 c609719bSwdenk VIDEO_TSTC_FCT test char fct 458 c609719bSwdenk (i.e. i8042_tstc) 459 c609719bSwdenk VIDEO_GETC_FCT get char fct 460 c609719bSwdenk (i.e. i8042_getc) 461 c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 462 c609719bSwdenk (requires blink timer 463 c609719bSwdenk cf. i8042.c) 464 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 465 c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 466 c609719bSwdenk upper right corner 467 602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 468 c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 469 c609719bSwdenk upper left corner 470 a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 471 a6c7ad2fSwdenk linux_logo.h for logo. 472 a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 473 c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 474 11ccc33fSMarcel Ziswiler additional board info beside 475 c609719bSwdenk the logo 476 c609719bSwdenk 477 c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 478 c609719bSwdenk default i/o. Serial console can be forced with 479 c609719bSwdenk environment 'console=serial'. 480 c609719bSwdenk 481 a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 482 a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 483 a3ad8e26Swdenk the "silent" environment variable. See 484 a3ad8e26Swdenk doc/README.silent for more information. 485 a3ad8e26Swdenk 486 c609719bSwdenk- Console Baudrate: 487 c609719bSwdenk CONFIG_BAUDRATE - in bps 488 c609719bSwdenk Select one of the baudrates listed in 489 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 490 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 491 c609719bSwdenk 492 c92fac91SHeiko Schocher- Console Rx buffer length 493 c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 494 c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 495 2b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 496 c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 497 c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 498 c92fac91SHeiko Schocher the SMC. 499 c92fac91SHeiko Schocher 500 c609719bSwdenk- Interrupt driven serial port input: 501 c609719bSwdenk CONFIG_SERIAL_SOFTWARE_FIFO 502 c609719bSwdenk 503 c609719bSwdenk PPC405GP only. 504 c609719bSwdenk Use an interrupt handler for receiving data on the 505 c609719bSwdenk serial port. It also enables using hardware handshake 506 c609719bSwdenk (RTS/CTS) and UART's built-in FIFO. Set the number of 507 c609719bSwdenk bytes the interrupt driven input buffer should have. 508 c609719bSwdenk 509 109c0e3aSwdenk Leave undefined to disable this feature, including 510 109c0e3aSwdenk disable the buffer and hardware handshake. 511 c609719bSwdenk 512 1d49b1f3Sstroese- Console UART Number: 513 1d49b1f3Sstroese CONFIG_UART1_CONSOLE 514 1d49b1f3Sstroese 515 0c8721a4SWolfgang Denk AMCC PPC4xx only. 516 1d49b1f3Sstroese If defined internal UART1 (and not UART0) is used 517 1d49b1f3Sstroese as default U-Boot console. 518 1d49b1f3Sstroese 519 c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 520 c609719bSwdenk Delay before automatically booting the default image; 521 c609719bSwdenk set to -1 to disable autoboot. 522 c609719bSwdenk 523 c609719bSwdenk See doc/README.autoboot for these options that 524 c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 525 c609719bSwdenk CONFIG_BOOT_RETRY_TIME 526 c609719bSwdenk CONFIG_BOOT_RETRY_MIN 527 c609719bSwdenk CONFIG_AUTOBOOT_KEYED 528 c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 529 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 530 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 531 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 532 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 533 c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 534 c609719bSwdenk CONFIG_RESET_TO_RETRY 535 c609719bSwdenk 536 c609719bSwdenk- Autoboot Command: 537 c609719bSwdenk CONFIG_BOOTCOMMAND 538 c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 539 c609719bSwdenk define a command string that is automatically executed 540 c609719bSwdenk when no character is read on the console interface 541 c609719bSwdenk within "Boot Delay" after reset. 542 c609719bSwdenk 543 c609719bSwdenk CONFIG_BOOTARGS 544 c609719bSwdenk This can be used to pass arguments to the bootm 545 c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 546 c609719bSwdenk environment value "bootargs". 547 c609719bSwdenk 548 c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 549 c609719bSwdenk The value of these goes into the environment as 550 c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 551 c609719bSwdenk as a convenience, when switching between booting from 552 11ccc33fSMarcel Ziswiler RAM and NFS. 553 c609719bSwdenk 554 c609719bSwdenk- Pre-Boot Commands: 555 c609719bSwdenk CONFIG_PREBOOT 556 c609719bSwdenk 557 c609719bSwdenk When this option is #defined, the existence of the 558 c609719bSwdenk environment variable "preboot" will be checked 559 c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 560 c609719bSwdenk countdown and/or running the auto-boot command resp. 561 c609719bSwdenk entering interactive mode. 562 c609719bSwdenk 563 c609719bSwdenk This feature is especially useful when "preboot" is 564 c609719bSwdenk automatically generated or modified. For an example 565 c609719bSwdenk see the LWMON board specific code: here "preboot" is 566 c609719bSwdenk modified when the user holds down a certain 567 c609719bSwdenk combination of keys on the (special) keyboard when 568 c609719bSwdenk booting the systems 569 c609719bSwdenk 570 c609719bSwdenk- Serial Download Echo Mode: 571 c609719bSwdenk CONFIG_LOADS_ECHO 572 c609719bSwdenk If defined to 1, all characters received during a 573 c609719bSwdenk serial download (using the "loads" command) are 574 c609719bSwdenk echoed back. This might be needed by some terminal 575 c609719bSwdenk emulations (like "cu"), but may as well just take 576 c609719bSwdenk time on others. This setting #define's the initial 577 c609719bSwdenk value of the "loads_echo" environment variable. 578 c609719bSwdenk 579 602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 580 c609719bSwdenk CONFIG_KGDB_BAUDRATE 581 c609719bSwdenk Select one of the baudrates listed in 582 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 583 c609719bSwdenk 584 c609719bSwdenk- Monitor Functions: 585 602ad3b3SJon Loeliger Monitor commands can be included or excluded 586 602ad3b3SJon Loeliger from the build by using the #include files 587 602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 588 602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 589 602ad3b3SJon Loeliger and augmenting with additional #define's 590 602ad3b3SJon Loeliger for wanted commands. 591 c609719bSwdenk 592 602ad3b3SJon Loeliger The default command configuration includes all commands 593 602ad3b3SJon Loeliger except those marked below with a "*". 594 602ad3b3SJon Loeliger 595 602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 596 602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 597 602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 598 602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 599 602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 600 602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 601 602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 602 602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 603 602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 604 602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 605 602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 606 602ad3b3SJon Loeliger CONFIG_CMD_DOC * Disk-On-Chip Support 607 a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 608 a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 609 a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 610 a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 611 602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 612 602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 613 602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 614 602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 615 bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 616 602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 617 602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 618 602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 619 602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 620 602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 621 602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 622 602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 623 602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 624 602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 625 602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 626 602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 627 602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 628 602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 629 602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 630 602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 631 602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 632 602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 633 602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 634 56523f12Swdenk loop, loopw, mtest 635 602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 636 602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 637 602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 638 68d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 639 602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 640 602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 641 e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 642 e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 643 602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 644 602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 645 602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 646 602ad3b3SJon Loeliger host 647 602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 648 602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 649 602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 650 602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 651 602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 652 602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 653 602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 654 602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 655 602ad3b3SJon Loeliger (4xx only) 656 74de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 657 602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 658 602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 659 602ad3b3SJon Loeliger CONFIG_CMD_VFD * VFD support (TRAB) 660 602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 661 602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 662 c609719bSwdenk 663 c609719bSwdenk 664 c609719bSwdenk EXAMPLE: If you want all functions except of network 665 c609719bSwdenk support you can write: 666 c609719bSwdenk 667 602ad3b3SJon Loeliger #include "config_cmd_all.h" 668 602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 669 c609719bSwdenk 670 213bf8c8SGerald Van Baren Other Commands: 671 213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 672 c609719bSwdenk 673 c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 674 602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 675 c609719bSwdenk what you (and your U-Boot users) are doing. Data 676 c609719bSwdenk cache cannot be enabled on systems like the 8xx or 677 c609719bSwdenk 8260 (where accesses to the IMMR region must be 678 c609719bSwdenk uncached), and it cannot be disabled on all other 679 c609719bSwdenk systems where we (mis-) use the data cache to hold an 680 c609719bSwdenk initial stack and some data. 681 c609719bSwdenk 682 c609719bSwdenk 683 c609719bSwdenk XXX - this list needs to get updated! 684 c609719bSwdenk 685 c609719bSwdenk- Watchdog: 686 c609719bSwdenk CONFIG_WATCHDOG 687 c609719bSwdenk If this variable is defined, it enables watchdog 688 7152b1d0Swdenk support. There must be support in the platform specific 689 c609719bSwdenk code for a watchdog. For the 8xx and 8260 CPUs, the 690 c609719bSwdenk SIU Watchdog feature is enabled in the SYPCR 691 c609719bSwdenk register. 692 c609719bSwdenk 693 c1551ea8Sstroese- U-Boot Version: 694 c1551ea8Sstroese CONFIG_VERSION_VARIABLE 695 c1551ea8Sstroese If this variable is defined, an environment variable 696 c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 697 c1551ea8Sstroese version as printed by the "version" command. 698 c1551ea8Sstroese This variable is readonly. 699 c1551ea8Sstroese 700 c609719bSwdenk- Real-Time Clock: 701 c609719bSwdenk 702 602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 703 c609719bSwdenk has to be selected, too. Define exactly one of the 704 c609719bSwdenk following options: 705 c609719bSwdenk 706 c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 707 c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 708 7ce63709SGuennadi Liakhovetski CONFIG_RTC_MC13783 - use MC13783 RTC 709 c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 710 1cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 711 c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 712 7f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 713 3bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 714 9536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 715 4c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 716 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 717 c609719bSwdenk 718 b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 719 b37c7e5eSwdenk must also be configured. See I2C Support, below. 720 b37c7e5eSwdenk 721 e92739d3SPeter Tyser- GPIO Support: 722 e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 723 e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 724 e92739d3SPeter Tyser 725 e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 726 e92739d3SPeter Tyser must also be configured. See I2C Support, below. 727 e92739d3SPeter Tyser 728 c609719bSwdenk- Timestamp Support: 729 c609719bSwdenk 730 c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 731 c609719bSwdenk (date and time) of an image is printed by image 732 c609719bSwdenk commands like bootm or iminfo. This option is 733 602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 734 c609719bSwdenk 735 c609719bSwdenk- Partition Support: 736 c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 737 07f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 738 c609719bSwdenk 739 602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 740 218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 741 218ca724SWolfgang Denk least one partition type as well. 742 c609719bSwdenk 743 c609719bSwdenk- IDE Reset method: 744 4d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 745 4d13cbadSwdenk board configurations files but used nowhere! 746 c609719bSwdenk 747 4d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 748 4d13cbadSwdenk be performed by calling the function 749 4d13cbadSwdenk ide_set_reset(int reset) 750 4d13cbadSwdenk which has to be defined in a board specific file 751 c609719bSwdenk 752 c609719bSwdenk- ATAPI Support: 753 c609719bSwdenk CONFIG_ATAPI 754 c609719bSwdenk 755 c609719bSwdenk Set this to enable ATAPI support. 756 c609719bSwdenk 757 c40b2956Swdenk- LBA48 Support 758 c40b2956Swdenk CONFIG_LBA48 759 c40b2956Swdenk 760 c40b2956Swdenk Set this to enable support for disks larger than 137GB 761 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Also look at CONFIG_SYS_64BIT_LBA ,CONFIG_SYS_64BIT_VSPRINTF and CONFIG_SYS_64BIT_STRTOUL 762 c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 763 c40b2956Swdenk support disks up to 2.1TB. 764 c40b2956Swdenk 765 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 766 c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 767 c40b2956Swdenk Default is 32bit. 768 c40b2956Swdenk 769 c609719bSwdenk- SCSI Support: 770 c609719bSwdenk At the moment only there is only support for the 771 c609719bSwdenk SYM53C8XX SCSI controller; define 772 c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 773 c609719bSwdenk 774 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 775 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 776 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 777 c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 778 c609719bSwdenk devices. 779 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 780 c609719bSwdenk 781 c609719bSwdenk- NETWORK Support (PCI): 782 682011ffSwdenk CONFIG_E1000 783 682011ffSwdenk Support for Intel 8254x gigabit chips. 784 682011ffSwdenk 785 ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 786 11ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 787 ac3315c2SAndre Schwarz 788 c609719bSwdenk CONFIG_EEPRO100 789 c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 790 11ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 791 c609719bSwdenk write routine for first time initialisation. 792 c609719bSwdenk 793 c609719bSwdenk CONFIG_TULIP 794 c609719bSwdenk Support for Digital 2114x chips. 795 c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 796 c609719bSwdenk modem chip initialisation (KS8761/QS6611). 797 c609719bSwdenk 798 c609719bSwdenk CONFIG_NATSEMI 799 c609719bSwdenk Support for National dp83815 chips. 800 c609719bSwdenk 801 c609719bSwdenk CONFIG_NS8382X 802 c609719bSwdenk Support for National dp8382[01] gigabit chips. 803 c609719bSwdenk 804 45219c46Swdenk- NETWORK Support (other): 805 45219c46Swdenk 806 45219c46Swdenk CONFIG_DRIVER_LAN91C96 807 45219c46Swdenk Support for SMSC's LAN91C96 chips. 808 45219c46Swdenk 809 45219c46Swdenk CONFIG_LAN91C96_BASE 810 45219c46Swdenk Define this to hold the physical address 811 45219c46Swdenk of the LAN91C96's I/O space 812 45219c46Swdenk 813 45219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 814 45219c46Swdenk Define this to enable 32 bit addressing 815 45219c46Swdenk 816 f39748aeSwdenk CONFIG_DRIVER_SMC91111 817 f39748aeSwdenk Support for SMSC's LAN91C111 chip 818 f39748aeSwdenk 819 f39748aeSwdenk CONFIG_SMC91111_BASE 820 f39748aeSwdenk Define this to hold the physical address 821 f39748aeSwdenk of the device (I/O space) 822 f39748aeSwdenk 823 f39748aeSwdenk CONFIG_SMC_USE_32_BIT 824 f39748aeSwdenk Define this if data bus is 32 bits 825 f39748aeSwdenk 826 f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 827 f39748aeSwdenk Define this to use i/o functions instead of macros 828 f39748aeSwdenk (some hardware wont work with macros) 829 f39748aeSwdenk 830 557b377dSJens Gehrlein CONFIG_DRIVER_SMC911X 831 557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 832 557b377dSJens Gehrlein 833 557b377dSJens Gehrlein CONFIG_DRIVER_SMC911X_BASE 834 557b377dSJens Gehrlein Define this to hold the physical address 835 557b377dSJens Gehrlein of the device (I/O space) 836 557b377dSJens Gehrlein 837 557b377dSJens Gehrlein CONFIG_DRIVER_SMC911X_32_BIT 838 557b377dSJens Gehrlein Define this if data bus is 32 bits 839 557b377dSJens Gehrlein 840 557b377dSJens Gehrlein CONFIG_DRIVER_SMC911X_16_BIT 841 557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 842 557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 843 557b377dSJens Gehrlein words you may also try CONFIG_DRIVER_SMC911X_32_BIT. 844 557b377dSJens Gehrlein 845 c609719bSwdenk- USB Support: 846 c609719bSwdenk At the moment only the UHCI host controller is 847 4d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 848 c609719bSwdenk CONFIG_USB_UHCI to enable it. 849 c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 850 30d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 851 c609719bSwdenk storage devices. 852 c609719bSwdenk Note: 853 c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 854 c609719bSwdenk (TEAC FD-05PUB). 855 4d13cbadSwdenk MPC5200 USB requires additional defines: 856 4d13cbadSwdenk CONFIG_USB_CLOCK 857 4d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 858 4d13cbadSwdenk CONFIG_USB_CONFIG 859 4d13cbadSwdenk for differential drivers: 0x00001000 860 4d13cbadSwdenk for single ended drivers: 0x00005000 861 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 862 fdcfaa1bSZhang Wei May be defined to allow interrupt polling 863 fdcfaa1bSZhang Wei instead of using asynchronous interrupts 864 4d13cbadSwdenk 865 16c8d5e7SWolfgang Denk- USB Device: 866 16c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 867 16c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 868 16c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 869 11ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 870 16c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 871 16c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 872 16c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 873 16c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 874 16c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 875 16c8d5e7SWolfgang Denk a Linux host by 876 16c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 877 16c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 878 16c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 879 16c8d5e7SWolfgang Denk might be defined in YourBoardName.h 880 16c8d5e7SWolfgang Denk 881 16c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 882 16c8d5e7SWolfgang Denk Define this to build a UDC device 883 16c8d5e7SWolfgang Denk 884 16c8d5e7SWolfgang Denk CONFIG_USB_TTY 885 16c8d5e7SWolfgang Denk Define this to have a tty type of device available to 886 16c8d5e7SWolfgang Denk talk to the UDC device 887 16c8d5e7SWolfgang Denk 888 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 889 16c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 890 16c8d5e7SWolfgang Denk be set to usbtty. 891 16c8d5e7SWolfgang Denk 892 16c8d5e7SWolfgang Denk mpc8xx: 893 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 894 16c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 895 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 896 16c8d5e7SWolfgang Denk 897 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 898 16c8d5e7SWolfgang Denk Derive USB clock from brgclk 899 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 900 16c8d5e7SWolfgang Denk 901 16c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 902 16c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 903 16c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 904 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 905 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 906 16c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 907 16c8d5e7SWolfgang Denk 908 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 909 16c8d5e7SWolfgang Denk Define this string as the name of your company for 910 16c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 911 16c8d5e7SWolfgang Denk 912 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 913 16c8d5e7SWolfgang Denk Define this string as the name of your product 914 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 915 16c8d5e7SWolfgang Denk 916 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 917 16c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 918 16c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 919 16c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 920 16c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 921 16c8d5e7SWolfgang Denk 922 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 923 16c8d5e7SWolfgang Denk Define this as the unique Product ID 924 16c8d5e7SWolfgang Denk for your device 925 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 926 c609719bSwdenk 927 c609719bSwdenk 928 c609719bSwdenk- MMC Support: 929 c609719bSwdenk The MMC controller on the Intel PXA is supported. To 930 c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 931 c609719bSwdenk accessed from the boot prompt by mapping the device 932 c609719bSwdenk to physical memory similar to flash. Command line is 933 602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 934 602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 935 c609719bSwdenk 936 6705d81eSwdenk- Journaling Flash filesystem support: 937 6705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 938 6705d81eSwdenk CONFIG_JFFS2_NAND_DEV 939 6705d81eSwdenk Define these for a default partition on a NAND device 940 6705d81eSwdenk 941 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 942 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 943 6705d81eSwdenk Define these for a default partition on a NOR device 944 6705d81eSwdenk 945 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 946 6705d81eSwdenk Define this to create an own partition. You have to provide a 947 6705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 948 6705d81eSwdenk 949 6705d81eSwdenk If you define only one JFFS2 partition you may also want to 950 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 951 6705d81eSwdenk to disable the command chpart. This is the default when you 952 6705d81eSwdenk have not defined a custom partition 953 6705d81eSwdenk 954 c609719bSwdenk- Keyboard Support: 955 c609719bSwdenk CONFIG_ISA_KEYBOARD 956 c609719bSwdenk 957 c609719bSwdenk Define this to enable standard (PC-Style) keyboard 958 c609719bSwdenk support 959 c609719bSwdenk 960 c609719bSwdenk CONFIG_I8042_KBD 961 c609719bSwdenk Standard PC keyboard driver with US (is default) and 962 c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 963 c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 964 c609719bSwdenk for cfb_console. Supports cursor blinking. 965 c609719bSwdenk 966 c609719bSwdenk- Video support: 967 c609719bSwdenk CONFIG_VIDEO 968 c609719bSwdenk 969 c609719bSwdenk Define this to enable video support (for output to 970 c609719bSwdenk video). 971 c609719bSwdenk 972 c609719bSwdenk CONFIG_VIDEO_CT69000 973 c609719bSwdenk 974 c609719bSwdenk Enable Chips & Technologies 69000 Video chip 975 c609719bSwdenk 976 c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 977 eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 978 eeb1b77bSwdenk video output is selected via environment 'videoout' 979 eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 980 eeb1b77bSwdenk assumed. 981 c609719bSwdenk 982 eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 983 11ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 984 eeb1b77bSwdenk are possible: 985 eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 986 eeb1b77bSwdenk Following standard modes are supported (* is default): 987 eeb1b77bSwdenk 988 eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 989 eeb1b77bSwdenk -------------+--------------------------------------------- 990 eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 991 eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 992 eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 993 eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 994 eeb1b77bSwdenk -------------+--------------------------------------------- 995 c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 996 c609719bSwdenk 997 eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 998 7817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 999 eeb1b77bSwdenk 1000 eeb1b77bSwdenk 1001 a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1002 a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1003 a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1004 a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1005 a6c7ad2fSwdenk 1006 682011ffSwdenk- Keyboard Support: 1007 682011ffSwdenk CONFIG_KEYBOARD 1008 682011ffSwdenk 1009 682011ffSwdenk Define this to enable a custom keyboard support. 1010 682011ffSwdenk This simply calls drv_keyboard_init() which must be 1011 682011ffSwdenk defined in your board-specific files. 1012 682011ffSwdenk The only board using this so far is RBC823. 1013 a6c7ad2fSwdenk 1014 c609719bSwdenk- LCD Support: CONFIG_LCD 1015 c609719bSwdenk 1016 c609719bSwdenk Define this to enable LCD support (for output to LCD 1017 c609719bSwdenk display); also select one of the supported displays 1018 c609719bSwdenk by defining one of these: 1019 c609719bSwdenk 1020 39cf4804SStelian Pop CONFIG_ATMEL_LCD: 1021 39cf4804SStelian Pop 1022 39cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 1023 39cf4804SStelian Pop 1024 fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1025 c609719bSwdenk 1026 fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1027 c609719bSwdenk 1028 fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1029 c609719bSwdenk 1030 fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1031 fd3103bbSwdenk Active, color, single scan. 1032 fd3103bbSwdenk 1033 fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1034 fd3103bbSwdenk 1035 fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1036 c609719bSwdenk Active, color, single scan. 1037 c609719bSwdenk 1038 c609719bSwdenk CONFIG_SHARP_16x9 1039 c609719bSwdenk 1040 c609719bSwdenk Sharp 320x240. Active, color, single scan. 1041 c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1042 c609719bSwdenk 1043 c609719bSwdenk CONFIG_SHARP_LQ64D341 1044 c609719bSwdenk 1045 c609719bSwdenk Sharp LQ64D341 display, 640x480. 1046 c609719bSwdenk Active, color, single scan. 1047 c609719bSwdenk 1048 c609719bSwdenk CONFIG_HLD1045 1049 c609719bSwdenk 1050 c609719bSwdenk HLD1045 display, 640x480. 1051 c609719bSwdenk Active, color, single scan. 1052 c609719bSwdenk 1053 c609719bSwdenk CONFIG_OPTREX_BW 1054 c609719bSwdenk 1055 c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1056 c609719bSwdenk or 1057 c609719bSwdenk Hitachi LMG6912RPFC-00T 1058 c609719bSwdenk or 1059 c609719bSwdenk Hitachi SP14Q002 1060 c609719bSwdenk 1061 c609719bSwdenk 320x240. Black & white. 1062 c609719bSwdenk 1063 c609719bSwdenk Normally display is black on white background; define 1064 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1065 c609719bSwdenk 1066 7152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1067 d791b1dcSwdenk 1068 d791b1dcSwdenk If this option is set, the environment is checked for 1069 d791b1dcSwdenk a variable "splashimage". If found, the usual display 1070 d791b1dcSwdenk of logo, copyright and system information on the LCD 1071 e94d2cd9Swdenk is suppressed and the BMP image at the address 1072 d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1073 d791b1dcSwdenk console is redirected to the "nulldev", too. This 1074 d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1075 d791b1dcSwdenk loaded very quickly after power-on. 1076 d791b1dcSwdenk 1077 98f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 1078 98f4a3dfSStefan Roese 1079 98f4a3dfSStefan Roese If this option is set, additionally to standard BMP 1080 98f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 1081 98f4a3dfSStefan Roese splashscreen support or the bmp command. 1082 98f4a3dfSStefan Roese 1083 c29fdfc1Swdenk- Compression support: 1084 c29fdfc1Swdenk CONFIG_BZIP2 1085 c29fdfc1Swdenk 1086 c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1087 c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1088 c29fdfc1Swdenk compressed images are supported. 1089 c29fdfc1Swdenk 1090 c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1091 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1092 c29fdfc1Swdenk be at least 4MB. 1093 d791b1dcSwdenk 1094 fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1095 fc9c1727SLuigi 'Comio' Mantellini 1096 fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1097 fc9c1727SLuigi 'Comio' Mantellini images is included. 1098 fc9c1727SLuigi 'Comio' Mantellini 1099 fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1100 fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1101 fc9c1727SLuigi 'Comio' Mantellini formula: 1102 fc9c1727SLuigi 'Comio' Mantellini 1103 fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1104 fc9c1727SLuigi 'Comio' Mantellini 1105 fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1106 fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1107 fc9c1727SLuigi 'Comio' Mantellini 1108 fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1109 fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1110 fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1111 fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1112 fc9c1727SLuigi 'Comio' Mantellini 1113 fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1114 fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 1115 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1116 fc9c1727SLuigi 'Comio' Mantellini 1117 17ea1177Swdenk- MII/PHY support: 1118 17ea1177Swdenk CONFIG_PHY_ADDR 1119 17ea1177Swdenk 1120 17ea1177Swdenk The address of PHY on MII bus. 1121 17ea1177Swdenk 1122 17ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 1123 17ea1177Swdenk 1124 17ea1177Swdenk The clock frequency of the MII bus 1125 17ea1177Swdenk 1126 17ea1177Swdenk CONFIG_PHY_GIGE 1127 17ea1177Swdenk 1128 17ea1177Swdenk If this option is set, support for speed/duplex 1129 11ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 1130 17ea1177Swdenk 1131 17ea1177Swdenk CONFIG_PHY_RESET_DELAY 1132 17ea1177Swdenk 1133 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1134 17ea1177Swdenk reset before any MII register access is possible. 1135 17ea1177Swdenk For such PHY, set this option to the usec delay 1136 17ea1177Swdenk required. (minimum 300usec for LXT971A) 1137 17ea1177Swdenk 1138 17ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 1139 17ea1177Swdenk 1140 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1141 17ea1177Swdenk command issued before MII status register can be read 1142 17ea1177Swdenk 1143 c609719bSwdenk- Ethernet address: 1144 c609719bSwdenk CONFIG_ETHADDR 1145 c68a05feSrichardretanubun CONFIG_ETH1ADDR 1146 c609719bSwdenk CONFIG_ETH2ADDR 1147 c609719bSwdenk CONFIG_ETH3ADDR 1148 c68a05feSrichardretanubun CONFIG_ETH4ADDR 1149 c68a05feSrichardretanubun CONFIG_ETH5ADDR 1150 c609719bSwdenk 1151 11ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 1152 11ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1153 c609719bSwdenk is not determined automatically. 1154 c609719bSwdenk 1155 c609719bSwdenk- IP address: 1156 c609719bSwdenk CONFIG_IPADDR 1157 c609719bSwdenk 1158 c609719bSwdenk Define a default value for the IP address to use for 1159 11ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1160 c609719bSwdenk determined through e.g. bootp. 1161 c609719bSwdenk 1162 c609719bSwdenk- Server IP address: 1163 c609719bSwdenk CONFIG_SERVERIP 1164 c609719bSwdenk 1165 c609719bSwdenk Defines a default value for the IP address of a TFTP 1166 c609719bSwdenk server to contact when using the "tftboot" command. 1167 c609719bSwdenk 1168 53a5c424SDavid Updegraff- Multicast TFTP Mode: 1169 53a5c424SDavid Updegraff CONFIG_MCAST_TFTP 1170 53a5c424SDavid Updegraff 1171 53a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 1172 53a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 1173 11ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 1174 53a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 1175 53a5c424SDavid Updegraff multicast group. 1176 53a5c424SDavid Updegraff 1177 53a5c424SDavid Updegraff CONFIG_BOOTP_RANDOM_DELAY 1178 c609719bSwdenk- BOOTP Recovery Mode: 1179 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1180 c609719bSwdenk 1181 c609719bSwdenk If you have many targets in a network that try to 1182 c609719bSwdenk boot using BOOTP, you may want to avoid that all 1183 c609719bSwdenk systems send out BOOTP requests at precisely the same 1184 c609719bSwdenk moment (which would happen for instance at recovery 1185 c609719bSwdenk from a power failure, when all systems will try to 1186 c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1187 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1188 c609719bSwdenk inserted before sending out BOOTP requests. The 1189 6c33c785SWolfgang Denk following delays are inserted then: 1190 c609719bSwdenk 1191 c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1192 c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1193 c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1194 c609719bSwdenk 4th and following 1195 c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1196 c609719bSwdenk 1197 fe389a82Sstroese- DHCP Advanced Options: 1198 1fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 1199 1fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1200 fe389a82Sstroese 1201 1fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 1202 1fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 1203 1fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 1204 1fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 1205 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 1206 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 1207 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS 1208 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 1209 1fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 1210 1fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 1211 1fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 1212 1fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1213 fe389a82Sstroese 1214 5d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 1215 5d110f0aSWilson Callan environment variable, not the BOOTP server. 1216 fe389a82Sstroese 1217 fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1218 fe389a82Sstroese serverip from a DHCP server, it is possible that more 1219 fe389a82Sstroese than one DNS serverip is offered to the client. 1220 fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1221 fe389a82Sstroese serverip will be stored in the additional environment 1222 fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1223 fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 1224 1fe80d79SJon Loeliger is defined. 1225 fe389a82Sstroese 1226 fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1227 fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1228 fe389a82Sstroese need the hostname of the DHCP requester. 1229 5d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 1230 1fe80d79SJon Loeliger of the "hostname" environment variable is passed as 1231 1fe80d79SJon Loeliger option 12 to the DHCP server. 1232 fe389a82Sstroese 1233 d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1234 d9a2f416SAras Vaichas 1235 d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1236 d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1237 d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1238 d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1239 d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1240 d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1241 d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1242 d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1243 d9a2f416SAras Vaichas that one of the retries will be successful but note that 1244 d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1245 d9a2f416SAras Vaichas this delay. 1246 d9a2f416SAras Vaichas 1247 a3d991bdSwdenk - CDP Options: 1248 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1249 a3d991bdSwdenk 1250 a3d991bdSwdenk The device id used in CDP trigger frames. 1251 a3d991bdSwdenk 1252 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1253 a3d991bdSwdenk 1254 a3d991bdSwdenk A two character string which is prefixed to the MAC address 1255 a3d991bdSwdenk of the device. 1256 a3d991bdSwdenk 1257 a3d991bdSwdenk CONFIG_CDP_PORT_ID 1258 a3d991bdSwdenk 1259 a3d991bdSwdenk A printf format string which contains the ascii name of 1260 a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1261 11ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1262 a3d991bdSwdenk 1263 a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1264 a3d991bdSwdenk 1265 a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1266 a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1267 a3d991bdSwdenk 1268 a3d991bdSwdenk CONFIG_CDP_VERSION 1269 a3d991bdSwdenk 1270 a3d991bdSwdenk An ascii string containing the version of the software. 1271 a3d991bdSwdenk 1272 a3d991bdSwdenk CONFIG_CDP_PLATFORM 1273 a3d991bdSwdenk 1274 a3d991bdSwdenk An ascii string containing the name of the platform. 1275 a3d991bdSwdenk 1276 a3d991bdSwdenk CONFIG_CDP_TRIGGER 1277 a3d991bdSwdenk 1278 a3d991bdSwdenk A 32bit integer sent on the trigger. 1279 a3d991bdSwdenk 1280 a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1281 a3d991bdSwdenk 1282 a3d991bdSwdenk A 16bit integer containing the power consumption of the 1283 a3d991bdSwdenk device in .1 of milliwatts. 1284 a3d991bdSwdenk 1285 a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1286 a3d991bdSwdenk 1287 a3d991bdSwdenk A byte containing the id of the VLAN. 1288 a3d991bdSwdenk 1289 c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1290 c609719bSwdenk 1291 c609719bSwdenk Several configurations allow to display the current 1292 c609719bSwdenk status using a LED. For instance, the LED will blink 1293 c609719bSwdenk fast while running U-Boot code, stop blinking as 1294 c609719bSwdenk soon as a reply to a BOOTP request was received, and 1295 c609719bSwdenk start blinking slow once the Linux kernel is running 1296 c609719bSwdenk (supported by a status LED driver in the Linux 1297 c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1298 c609719bSwdenk feature in U-Boot. 1299 c609719bSwdenk 1300 c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1301 c609719bSwdenk 1302 c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1303 c609719bSwdenk on those systems that support this (optional) 1304 c609719bSwdenk feature, like the TQM8xxL modules. 1305 c609719bSwdenk 1306 c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1307 c609719bSwdenk 1308 b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1309 b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1310 11ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1311 c609719bSwdenk 1312 b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1313 602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1314 b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1315 b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1316 c609719bSwdenk command line interface. 1317 c609719bSwdenk 1318 bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1319 c609719bSwdenk 1320 b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1321 b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1322 b37c7e5eSwdenk support for I2C. 1323 c609719bSwdenk 1324 b37c7e5eSwdenk There are several other quantities that must also be 1325 b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1326 c609719bSwdenk 1327 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1328 b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1329 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 1330 11ccc33fSMarcel Ziswiler the CPU's i2c node address). 1331 c609719bSwdenk 1332 b37c7e5eSwdenk Now, the u-boot i2c code for the mpc8xx (cpu/mpc8xx/i2c.c) 1333 11ccc33fSMarcel Ziswiler sets the CPU up as a master node and so its address should 1334 b37c7e5eSwdenk therefore be cleared to 0 (See, eg, MPC823e User's Manual 1335 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD p.16-473). So, set CONFIG_SYS_I2C_SLAVE to 0. 1336 b37c7e5eSwdenk 1337 b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1338 b37c7e5eSwdenk 1339 b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1340 b37c7e5eSwdenk then the following macros need to be defined (examples are 1341 b37c7e5eSwdenk from include/configs/lwmon.h): 1342 c609719bSwdenk 1343 c609719bSwdenk I2C_INIT 1344 c609719bSwdenk 1345 b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1346 c609719bSwdenk controller or configure ports. 1347 c609719bSwdenk 1348 b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1349 b37c7e5eSwdenk 1350 c609719bSwdenk I2C_PORT 1351 c609719bSwdenk 1352 c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1353 c609719bSwdenk assumes both bits are on the same port). Valid values 1354 c609719bSwdenk are 0..3 for ports A..D. 1355 c609719bSwdenk 1356 c609719bSwdenk I2C_ACTIVE 1357 c609719bSwdenk 1358 c609719bSwdenk The code necessary to make the I2C data line active 1359 c609719bSwdenk (driven). If the data line is open collector, this 1360 c609719bSwdenk define can be null. 1361 c609719bSwdenk 1362 b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1363 b37c7e5eSwdenk 1364 c609719bSwdenk I2C_TRISTATE 1365 c609719bSwdenk 1366 c609719bSwdenk The code necessary to make the I2C data line tri-stated 1367 c609719bSwdenk (inactive). If the data line is open collector, this 1368 c609719bSwdenk define can be null. 1369 c609719bSwdenk 1370 b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1371 b37c7e5eSwdenk 1372 c609719bSwdenk I2C_READ 1373 c609719bSwdenk 1374 c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1375 c609719bSwdenk FALSE if it is low. 1376 c609719bSwdenk 1377 b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1378 b37c7e5eSwdenk 1379 c609719bSwdenk I2C_SDA(bit) 1380 c609719bSwdenk 1381 c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1382 c609719bSwdenk is FALSE, it clears it (low). 1383 c609719bSwdenk 1384 b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1385 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1386 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1387 b37c7e5eSwdenk 1388 c609719bSwdenk I2C_SCL(bit) 1389 c609719bSwdenk 1390 c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1391 c609719bSwdenk is FALSE, it clears it (low). 1392 c609719bSwdenk 1393 b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1394 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1395 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1396 b37c7e5eSwdenk 1397 c609719bSwdenk I2C_DELAY 1398 c609719bSwdenk 1399 c609719bSwdenk This delay is invoked four times per clock cycle so this 1400 c609719bSwdenk controls the rate of data transfer. The data rate thus 1401 b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1402 b37c7e5eSwdenk like: 1403 b37c7e5eSwdenk 1404 b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1405 c609719bSwdenk 1406 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 1407 47cd00faSwdenk 1408 47cd00faSwdenk When a board is reset during an i2c bus transfer 1409 47cd00faSwdenk chips might think that the current transfer is still 1410 47cd00faSwdenk in progress. On some boards it is possible to access 1411 47cd00faSwdenk the i2c SCLK line directly, either by using the 1412 47cd00faSwdenk processor pin as a GPIO or by having a second pin 1413 47cd00faSwdenk connected to the bus. If this option is defined a 1414 47cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 1415 47cd00faSwdenk is run early in the boot sequence. 1416 47cd00faSwdenk 1417 17ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 1418 17ea1177Swdenk 1419 17ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 1420 17ea1177Swdenk in u-boot bd_info structure based on u-boot environment 1421 17ea1177Swdenk variable "i2cfast". (see also i2cfast) 1422 17ea1177Swdenk 1423 bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1424 bb99ad6dSBen Warren 1425 bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1426 bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1427 bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1428 bb99ad6dSBen Warren Note that bus numbering is zero-based. 1429 bb99ad6dSBen Warren 1430 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1431 bb99ad6dSBen Warren 1432 bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1433 0f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 1434 0f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 1435 0f89c54bSPeter Tyser a 1D array of device addresses 1436 bb99ad6dSBen Warren 1437 bb99ad6dSBen Warren e.g. 1438 bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1439 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1440 bb99ad6dSBen Warren 1441 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1442 bb99ad6dSBen Warren 1443 bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1444 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1445 bb99ad6dSBen Warren 1446 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1447 bb99ad6dSBen Warren 1448 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1449 be5e6181STimur Tabi 1450 be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1451 be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1452 be5e6181STimur Tabi 1453 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 1454 0dc018ecSStefan Roese 1455 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 1456 0dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 1457 0dc018ecSStefan Roese 1458 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 1459 0dc018ecSStefan Roese 1460 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 1461 0dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 1462 0dc018ecSStefan Roese 1463 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 1464 9ebbb54fSVictor Gallardo 1465 9ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 1466 9ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 1467 9ebbb54fSVictor Gallardo specified DTT device. 1468 9ebbb54fSVictor Gallardo 1469 be5e6181STimur Tabi CONFIG_FSL_I2C 1470 be5e6181STimur Tabi 1471 be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 1472 7817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1473 be5e6181STimur Tabi 1474 67b23a32SHeiko Schocher CONFIG_I2C_MUX 1475 67b23a32SHeiko Schocher 1476 67b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 1477 67b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 1478 67b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 1479 67b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 1480 67b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 1481 67b23a32SHeiko Schocher the muxes to activate this new "bus". 1482 67b23a32SHeiko Schocher 1483 67b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 1484 67b23a32SHeiko Schocher feature! 1485 67b23a32SHeiko Schocher 1486 67b23a32SHeiko Schocher Example: 1487 67b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 1488 67b23a32SHeiko Schocher The First mux with address 70 and channel 6 1489 67b23a32SHeiko Schocher The Second mux with address 71 and channel 4 1490 67b23a32SHeiko Schocher 1491 67b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 1492 67b23a32SHeiko Schocher 1493 67b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 1494 67b23a32SHeiko Schocher of I2C Busses with muxes: 1495 67b23a32SHeiko Schocher 1496 67b23a32SHeiko Schocher => i2c bus 1497 67b23a32SHeiko Schocher Busses reached over muxes: 1498 67b23a32SHeiko Schocher Bus ID: 2 1499 67b23a32SHeiko Schocher reached over Mux(es): 1500 67b23a32SHeiko Schocher pca9544a@70 ch: 4 1501 67b23a32SHeiko Schocher Bus ID: 3 1502 67b23a32SHeiko Schocher reached over Mux(es): 1503 67b23a32SHeiko Schocher pca9544a@70 ch: 6 1504 67b23a32SHeiko Schocher pca9544a@71 ch: 4 1505 67b23a32SHeiko Schocher => 1506 67b23a32SHeiko Schocher 1507 67b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1508 67b23a32SHeiko Schocher u-boot sends First the Commando to the mux@70 to enable 1509 67b23a32SHeiko Schocher channel 6, and then the Commando to the mux@71 to enable 1510 67b23a32SHeiko Schocher the channel 4. 1511 67b23a32SHeiko Schocher 1512 67b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1513 67b23a32SHeiko Schocher usual, to communicate with your I2C devices behind 1514 67b23a32SHeiko Schocher the 2 muxes. 1515 67b23a32SHeiko Schocher 1516 67b23a32SHeiko Schocher This option is actually implemented for the bitbanging 1517 67b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 1518 67b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 1519 67b23a32SHeiko Schocher to add this option to other architectures. 1520 67b23a32SHeiko Schocher 1521 2ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 1522 2ac6985aSAndrew Dyer 1523 2ac6985aSAndrew Dyer defining this will force the i2c_read() function in 1524 2ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 1525 2ac6985aSAndrew Dyer between writing the address pointer and reading the 1526 2ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 1527 2ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 1528 2ac6985aSAndrew Dyer devices can use either method, but some require one or 1529 2ac6985aSAndrew Dyer the other. 1530 be5e6181STimur Tabi 1531 c609719bSwdenk- SPI Support: CONFIG_SPI 1532 c609719bSwdenk 1533 c609719bSwdenk Enables SPI driver (so far only tested with 1534 c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1535 c609719bSwdenk D/As on the SACSng board) 1536 c609719bSwdenk 1537 c609719bSwdenk CONFIG_SPI_X 1538 c609719bSwdenk 1539 c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1540 c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1541 c609719bSwdenk 1542 c609719bSwdenk CONFIG_SOFT_SPI 1543 c609719bSwdenk 1544 c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1545 c609719bSwdenk using hardware support. This is a general purpose 1546 c609719bSwdenk driver that only requires three general I/O port pins 1547 c609719bSwdenk (two outputs, one input) to function. If this is 1548 c609719bSwdenk defined, the board configuration must define several 1549 c609719bSwdenk SPI configuration items (port pins to use, etc). For 1550 c609719bSwdenk an example, see include/configs/sacsng.h. 1551 c609719bSwdenk 1552 04a9e118SBen Warren CONFIG_HARD_SPI 1553 04a9e118SBen Warren 1554 04a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 1555 04a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 1556 04a9e118SBen Warren must define a list of chip-select function pointers. 1557 04a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 1558 04a9e118SBen Warren example, see include/configs/mpc8349emds.h. 1559 04a9e118SBen Warren 1560 38254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 1561 38254f45SGuennadi Liakhovetski 1562 38254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 1563 38254f45SGuennadi Liakhovetski SoCs. Currently only i.MX31 is supported. 1564 38254f45SGuennadi Liakhovetski 1565 0133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 1566 0133502eSMatthias Fuchs 1567 0133502eSMatthias Fuchs Enables FPGA subsystem. 1568 0133502eSMatthias Fuchs 1569 0133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 1570 0133502eSMatthias Fuchs 1571 0133502eSMatthias Fuchs Enables support for specific chip vendors. 1572 0133502eSMatthias Fuchs (ALTERA, XILINX) 1573 0133502eSMatthias Fuchs 1574 0133502eSMatthias Fuchs CONFIG_FPGA_<family> 1575 0133502eSMatthias Fuchs 1576 0133502eSMatthias Fuchs Enables support for FPGA family. 1577 0133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 1578 0133502eSMatthias Fuchs 1579 0133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1580 c609719bSwdenk 1581 c609719bSwdenk Specify the number of FPGA devices to support. 1582 c609719bSwdenk 1583 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1584 c609719bSwdenk 1585 c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1586 c609719bSwdenk 1587 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1588 c609719bSwdenk 1589 c609719bSwdenk Enable checks on FPGA configuration interface busy 1590 c609719bSwdenk status by the configuration function. This option 1591 c609719bSwdenk will require a board or device specific function to 1592 c609719bSwdenk be written. 1593 c609719bSwdenk 1594 c609719bSwdenk CONFIG_FPGA_DELAY 1595 c609719bSwdenk 1596 c609719bSwdenk If defined, a function that provides delays in the FPGA 1597 c609719bSwdenk configuration driver. 1598 c609719bSwdenk 1599 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 1600 c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1601 c609719bSwdenk 1602 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 1603 c609719bSwdenk 1604 c609719bSwdenk Check for configuration errors during FPGA bitfile 1605 c609719bSwdenk loading. For example, abort during Virtex II 1606 c609719bSwdenk configuration if the INIT_B line goes low (which 1607 c609719bSwdenk indicated a CRC error). 1608 c609719bSwdenk 1609 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 1610 c609719bSwdenk 1611 c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1612 c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1613 c609719bSwdenk FPGA configuration sequence. The default time is 500 1614 11ccc33fSMarcel Ziswiler ms. 1615 c609719bSwdenk 1616 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 1617 c609719bSwdenk 1618 c609719bSwdenk Maximum time to wait for BUSY to deassert during 1619 11ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 1620 c609719bSwdenk 1621 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 1622 c609719bSwdenk 1623 c609719bSwdenk Time to wait after FPGA configuration. The default is 1624 11ccc33fSMarcel Ziswiler 200 ms. 1625 c609719bSwdenk 1626 c609719bSwdenk- Configuration Management: 1627 c609719bSwdenk CONFIG_IDENT_STRING 1628 c609719bSwdenk 1629 c609719bSwdenk If defined, this string will be added to the U-Boot 1630 c609719bSwdenk version information (U_BOOT_VERSION) 1631 c609719bSwdenk 1632 c609719bSwdenk- Vendor Parameter Protection: 1633 c609719bSwdenk 1634 c609719bSwdenk U-Boot considers the values of the environment 1635 c609719bSwdenk variables "serial#" (Board Serial Number) and 1636 7152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1637 c609719bSwdenk are set once by the board vendor / manufacturer, and 1638 c609719bSwdenk protects these variables from casual modification by 1639 c609719bSwdenk the user. Once set, these variables are read-only, 1640 c609719bSwdenk and write or delete attempts are rejected. You can 1641 11ccc33fSMarcel Ziswiler change this behaviour: 1642 c609719bSwdenk 1643 c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1644 c609719bSwdenk file, the write protection for vendor parameters is 1645 47cd00faSwdenk completely disabled. Anybody can change or delete 1646 c609719bSwdenk these parameters. 1647 c609719bSwdenk 1648 c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1649 c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 1650 11ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 1651 c609719bSwdenk which can be changed exactly ONCE by the user. [The 1652 c609719bSwdenk serial# is unaffected by this, i. e. it remains 1653 c609719bSwdenk read-only.] 1654 c609719bSwdenk 1655 c609719bSwdenk- Protected RAM: 1656 c609719bSwdenk CONFIG_PRAM 1657 c609719bSwdenk 1658 c609719bSwdenk Define this variable to enable the reservation of 1659 c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1660 c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1661 c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1662 c609719bSwdenk this default value by defining an environment 1663 c609719bSwdenk variable "pram" to the number of kB you want to 1664 c609719bSwdenk reserve. Note that the board info structure will 1665 c609719bSwdenk still show the full amount of RAM. If pRAM is 1666 c609719bSwdenk reserved, a new environment variable "mem" will 1667 c609719bSwdenk automatically be defined to hold the amount of 1668 c609719bSwdenk remaining RAM in a form that can be passed as boot 1669 c609719bSwdenk argument to Linux, for instance like that: 1670 c609719bSwdenk 1671 fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1672 c609719bSwdenk saveenv 1673 c609719bSwdenk 1674 c609719bSwdenk This way you can tell Linux not to use this memory, 1675 c609719bSwdenk either, which results in a memory region that will 1676 c609719bSwdenk not be affected by reboots. 1677 c609719bSwdenk 1678 c609719bSwdenk *WARNING* If your board configuration uses automatic 1679 c609719bSwdenk detection of the RAM size, you must make sure that 1680 c609719bSwdenk this memory test is non-destructive. So far, the 1681 c609719bSwdenk following board configurations are known to be 1682 c609719bSwdenk "pRAM-clean": 1683 c609719bSwdenk 1684 c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1685 c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1686 c609719bSwdenk PCU_E, FLAGADM, TQM8260 1687 c609719bSwdenk 1688 c609719bSwdenk- Error Recovery: 1689 c609719bSwdenk CONFIG_PANIC_HANG 1690 c609719bSwdenk 1691 c609719bSwdenk Define this variable to stop the system in case of a 1692 c609719bSwdenk fatal error, so that you have to reset it manually. 1693 c609719bSwdenk This is probably NOT a good idea for an embedded 1694 11ccc33fSMarcel Ziswiler system where you want the system to reboot 1695 c609719bSwdenk automatically as fast as possible, but it may be 1696 c609719bSwdenk useful during development since you can try to debug 1697 c609719bSwdenk the conditions that lead to the situation. 1698 c609719bSwdenk 1699 c609719bSwdenk CONFIG_NET_RETRY_COUNT 1700 c609719bSwdenk 1701 c609719bSwdenk This variable defines the number of retries for 1702 c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1703 c609719bSwdenk before giving up the operation. If not defined, a 1704 c609719bSwdenk default value of 5 is used. 1705 c609719bSwdenk 1706 40cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 1707 40cb90eeSGuennadi Liakhovetski 1708 40cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 1709 40cb90eeSGuennadi Liakhovetski 1710 c609719bSwdenk- Command Interpreter: 1711 8078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 1712 04a85b3bSwdenk 1713 04a85b3bSwdenk Enable auto completion of commands using TAB. 1714 04a85b3bSwdenk 1715 8078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 1716 8078f1a5SWolfgang Denk for the "hush" shell. 1717 8078f1a5SWolfgang Denk 1718 8078f1a5SWolfgang Denk 1719 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 1720 c609719bSwdenk 1721 c609719bSwdenk Define this variable to enable the "hush" shell (from 1722 c609719bSwdenk Busybox) as command line interpreter, thus enabling 1723 c609719bSwdenk powerful command line syntax like 1724 c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 1725 c609719bSwdenk constructs ("shell scripts"). 1726 c609719bSwdenk 1727 c609719bSwdenk If undefined, you get the old, much simpler behaviour 1728 c609719bSwdenk with a somewhat smaller memory footprint. 1729 c609719bSwdenk 1730 c609719bSwdenk 1731 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 1732 c609719bSwdenk 1733 c609719bSwdenk This defines the secondary prompt string, which is 1734 c609719bSwdenk printed when the command interpreter needs more input 1735 c609719bSwdenk to complete a command. Usually "> ". 1736 c609719bSwdenk 1737 c609719bSwdenk Note: 1738 c609719bSwdenk 1739 c609719bSwdenk In the current implementation, the local variables 1740 c609719bSwdenk space and global environment variables space are 1741 c609719bSwdenk separated. Local variables are those you define by 1742 3b57fe0aSwdenk simply typing `name=value'. To access a local 1743 c609719bSwdenk variable later on, you have write `$name' or 1744 3b57fe0aSwdenk `${name}'; to execute the contents of a variable 1745 3b57fe0aSwdenk directly type `$name' at the command prompt. 1746 c609719bSwdenk 1747 c609719bSwdenk Global environment variables are those you use 1748 c609719bSwdenk setenv/printenv to work with. To run a command stored 1749 c609719bSwdenk in such a variable, you need to use the run command, 1750 c609719bSwdenk and you must not use the '$' sign to access them. 1751 c609719bSwdenk 1752 c609719bSwdenk To store commands and special characters in a 1753 c609719bSwdenk variable, please use double quotation marks 1754 c609719bSwdenk surrounding the whole text of the variable, instead 1755 c609719bSwdenk of the backslashes before semicolons and special 1756 c609719bSwdenk symbols. 1757 c609719bSwdenk 1758 aa0c71acSWolfgang Denk- Commandline Editing and History: 1759 aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 1760 aa0c71acSWolfgang Denk 1761 11ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 1762 aa0c71acSWolfgang Denk commandline input operations 1763 aa0c71acSWolfgang Denk 1764 a8c7c708Swdenk- Default Environment: 1765 c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 1766 c609719bSwdenk 1767 c609719bSwdenk Define this to contain any number of null terminated 1768 c609719bSwdenk strings (variable = value pairs) that will be part of 1769 7152b1d0Swdenk the default environment compiled into the boot image. 1770 2262cfeeSwdenk 1771 c609719bSwdenk For example, place something like this in your 1772 c609719bSwdenk board's config file: 1773 c609719bSwdenk 1774 c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 1775 c609719bSwdenk "myvar1=value1\0" \ 1776 c609719bSwdenk "myvar2=value2\0" 1777 c609719bSwdenk 1778 c609719bSwdenk Warning: This method is based on knowledge about the 1779 c609719bSwdenk internal format how the environment is stored by the 1780 2262cfeeSwdenk U-Boot code. This is NOT an official, exported 1781 c609719bSwdenk interface! Although it is unlikely that this format 1782 7152b1d0Swdenk will change soon, there is no guarantee either. 1783 c609719bSwdenk You better know what you are doing here. 1784 c609719bSwdenk 1785 c609719bSwdenk Note: overly (ab)use of the default environment is 1786 c609719bSwdenk discouraged. Make sure to check other ways to preset 1787 74de7aefSWolfgang Denk the environment like the "source" command or the 1788 c609719bSwdenk boot command first. 1789 c609719bSwdenk 1790 a8c7c708Swdenk- DataFlash Support: 1791 2abbe075Swdenk CONFIG_HAS_DATAFLASH 1792 2abbe075Swdenk 1793 2abbe075Swdenk Defining this option enables DataFlash features and 1794 2abbe075Swdenk allows to read/write in Dataflash via the standard 1795 2abbe075Swdenk commands cp, md... 1796 2abbe075Swdenk 1797 3f85ce27Swdenk- SystemACE Support: 1798 3f85ce27Swdenk CONFIG_SYSTEMACE 1799 3f85ce27Swdenk 1800 3f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 1801 3f85ce27Swdenk chips attached via some sort of local bus. The address 1802 11ccc33fSMarcel Ziswiler of the chip must also be defined in the 1803 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 1804 3f85ce27Swdenk 1805 3f85ce27Swdenk #define CONFIG_SYSTEMACE 1806 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 1807 3f85ce27Swdenk 1808 3f85ce27Swdenk When SystemACE support is added, the "ace" device type 1809 3f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 1810 3f85ce27Swdenk 1811 ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 1812 ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 1813 ecb0ccd9SWolfgang Denk 1814 28cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 1815 ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 1816 28cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 1817 ecb0ccd9SWolfgang Denk number generator is used. 1818 ecb0ccd9SWolfgang Denk 1819 28cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 1820 28cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 1821 28cb9375SWolfgang Denk defined, the normal port 69 is used. 1822 28cb9375SWolfgang Denk 1823 28cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 1824 ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 1825 ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 1826 ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 1827 ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 1828 ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 1829 ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 1830 ecb0ccd9SWolfgang Denk 1831 a8c7c708Swdenk- Show boot progress: 1832 c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 1833 c609719bSwdenk 1834 c609719bSwdenk Defining this option allows to add some board- 1835 c609719bSwdenk specific code (calling a user-provided function 1836 c609719bSwdenk "show_boot_progress(int)") that enables you to show 1837 c609719bSwdenk the system's boot progress on some display (for 1838 c609719bSwdenk example, some LED's) on your board. At the moment, 1839 c609719bSwdenk the following checkpoints are implemented: 1840 c609719bSwdenk 1841 4bae9090SBartlomiej Sieka- Automatic software updates via TFTP server 1842 4bae9090SBartlomiej Sieka CONFIG_UPDATE_TFTP 1843 4bae9090SBartlomiej Sieka CONFIG_UPDATE_TFTP_CNT_MAX 1844 4bae9090SBartlomiej Sieka CONFIG_UPDATE_TFTP_MSEC_MAX 1845 4bae9090SBartlomiej Sieka 1846 4bae9090SBartlomiej Sieka These options enable and control the auto-update feature; 1847 4bae9090SBartlomiej Sieka for a more detailed description refer to doc/README.update. 1848 4bae9090SBartlomiej Sieka 1849 d558107cSStefan Roese- MTD Support (mtdparts command, UBI support) 1850 d558107cSStefan Roese CONFIG_MTD_DEVICE 1851 d558107cSStefan Roese 1852 d558107cSStefan Roese Adds the MTD device infrastructure from the Linux kernel. 1853 d558107cSStefan Roese Needed for mtdparts command support. 1854 d558107cSStefan Roese 1855 d558107cSStefan Roese CONFIG_MTD_PARTITIONS 1856 d558107cSStefan Roese 1857 d558107cSStefan Roese Adds the MTD partitioning infrastructure from the Linux 1858 d558107cSStefan Roese kernel. Needed for UBI support. 1859 d558107cSStefan Roese 1860 1372cce2SMarian BalakowiczLegacy uImage format: 1861 1372cce2SMarian Balakowicz 1862 c609719bSwdenk Arg Where When 1863 c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 1864 c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 1865 c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 1866 c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 1867 c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 1868 c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 1869 c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 1870 c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 1871 c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 1872 1372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 1873 c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 1874 c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 1875 c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 1876 c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 1877 1372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 1878 c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 1879 1372cce2SMarian Balakowicz 1880 1372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 1881 1372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 1882 1372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 1883 1372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 1884 1372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 1885 1372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 1886 1372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 1887 11ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 1888 1372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 1889 1372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 1890 1372cce2SMarian Balakowicz 1891 1372cce2SMarian Balakowicz 15 lib_<arch>/bootm.c All preparation done, transferring control to OS 1892 c609719bSwdenk 1893 63e73c9aSwdenk -30 lib_ppc/board.c Fatal error, hang the system 1894 63e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 1895 63e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 1896 63e73c9aSwdenk 1897 566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 1898 566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 1899 566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 1900 566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 1901 566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 1902 566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 1903 566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 1904 566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 1905 566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 1906 566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 1907 566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 1908 566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 1909 566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 1910 566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 1911 566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 1912 566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 1913 566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 1914 566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 1915 566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 1916 566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 1917 566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 1918 566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 1919 566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 1920 566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 1921 566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 1922 566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 1923 566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 1924 566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 1925 566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 1926 566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 1927 566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 1928 566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 1929 566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 1930 566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 1931 566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 1932 566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 1933 566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 1934 566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 1935 566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 1936 566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 1937 566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 1938 566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 1939 566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 1940 566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 1941 566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 1942 566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 1943 566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 1944 c609719bSwdenk 1945 566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 1946 c609719bSwdenk 1947 566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 1948 566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 1949 566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 1950 206c60cbSwdenk 1951 566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 1952 566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 1953 11ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 1954 566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 1955 566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 1956 566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 1957 74de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 1958 74de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 1959 566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 1960 c609719bSwdenk 1961 1372cce2SMarian BalakowiczFIT uImage format: 1962 1372cce2SMarian Balakowicz 1963 1372cce2SMarian Balakowicz Arg Where When 1964 1372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 1965 1372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 1966 1372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 1967 1372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 1968 1372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 1969 1372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 1970 f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 1971 1372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 1972 1372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 1973 1372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 1974 1372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 1975 1372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 1976 11ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 1977 11ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 1978 1372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 1979 1372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 1980 1372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 1981 1372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 1982 1372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 1983 1372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 1984 1372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 1985 1372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 1986 1372cce2SMarian Balakowicz 1987 1372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 1988 1372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 1989 1372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 1990 11ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 1991 1372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 1992 1372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 1993 1372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 1994 1372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 1995 1372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 1996 1372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 1997 1372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 1998 1372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 1999 1372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 2000 1372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 2001 1372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 2002 1372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 2003 1372cce2SMarian Balakowicz 2004 11ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 2005 1372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 2006 1372cce2SMarian Balakowicz 2007 11ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 2008 1372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 2009 1372cce2SMarian Balakowicz 2010 11ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 2011 1372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 2012 1372cce2SMarian Balakowicz 2013 1372cce2SMarian Balakowicz 2014 c609719bSwdenkModem Support: 2015 c609719bSwdenk-------------- 2016 c609719bSwdenk 2017 85ec0bccSwdenk[so far only for SMDK2400 and TRAB boards] 2018 c609719bSwdenk 2019 11ccc33fSMarcel Ziswiler- Modem support enable: 2020 c609719bSwdenk CONFIG_MODEM_SUPPORT 2021 c609719bSwdenk 2022 c609719bSwdenk- RTS/CTS Flow control enable: 2023 c609719bSwdenk CONFIG_HWFLOW 2024 c609719bSwdenk 2025 c609719bSwdenk- Modem debug support: 2026 c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2027 c609719bSwdenk 2028 c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2029 c609719bSwdenk for modem support. Useful only with BDI2000. 2030 c609719bSwdenk 2031 a8c7c708Swdenk- Interrupt support (PPC): 2032 a8c7c708Swdenk 2033 a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2034 a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 2035 11ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2036 a8c7c708Swdenk should set decrementer_count to appropriate value. If 2037 11ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2038 a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 2039 11ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2040 a8c7c708Swdenk specific handling. If board has watchdog / status_led 2041 a8c7c708Swdenk / other_activity_monitor it works automatically from 2042 a8c7c708Swdenk general timer_interrupt(). 2043 a8c7c708Swdenk 2044 c609719bSwdenk- General: 2045 c609719bSwdenk 2046 c609719bSwdenk In the target system modem support is enabled when a 2047 c609719bSwdenk specific key (key combination) is pressed during 2048 c609719bSwdenk power-on. Otherwise U-Boot will boot normally 2049 11ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2050 c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2051 c609719bSwdenk function, returning 1 and thus enabling modem 2052 c609719bSwdenk initialization. 2053 c609719bSwdenk 2054 c609719bSwdenk If there are no modem init strings in the 2055 c609719bSwdenk environment, U-Boot proceed to autoboot; the 2056 c609719bSwdenk previous output (banner, info printfs) will be 2057 11ccc33fSMarcel Ziswiler suppressed, though. 2058 c609719bSwdenk 2059 c609719bSwdenk See also: doc/README.Modem 2060 c609719bSwdenk 2061 c609719bSwdenk 2062 c609719bSwdenkConfiguration Settings: 2063 c609719bSwdenk----------------------- 2064 c609719bSwdenk 2065 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2066 c609719bSwdenk undefine this when you're short of memory. 2067 c609719bSwdenk 2068 2fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 2069 2fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 2070 2fb2604dSPeter Tyser 2071 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2072 c609719bSwdenk prompt for user input. 2073 c609719bSwdenk 2074 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2075 c609719bSwdenk 2076 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2077 c609719bSwdenk 2078 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2079 c609719bSwdenk 2080 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2081 c609719bSwdenk the application (usually a Linux kernel) when it is 2082 c609719bSwdenk booted 2083 c609719bSwdenk 2084 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2085 c609719bSwdenk List of legal baudrate settings for this board. 2086 c609719bSwdenk 2087 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2088 c609719bSwdenk Suppress display of console information at boot. 2089 c609719bSwdenk 2090 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2091 c609719bSwdenk If the board specific function 2092 c609719bSwdenk extern int overwrite_console (void); 2093 c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2094 c609719bSwdenk serial port, else the settings in the environment are used. 2095 c609719bSwdenk 2096 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2097 c609719bSwdenk Enable the call to overwrite_console(). 2098 c609719bSwdenk 2099 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2100 c609719bSwdenk Enable overwrite of previous console environment settings. 2101 c609719bSwdenk 2102 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2103 c609719bSwdenk Begin and End addresses of the area used by the 2104 c609719bSwdenk simple memory test. 2105 c609719bSwdenk 2106 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2107 c609719bSwdenk Enable an alternate, more extensive memory test. 2108 c609719bSwdenk 2109 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 2110 5f535fe1Swdenk Scratch address used by the alternate memory test 2111 5f535fe1Swdenk You only need to set this if address zero isn't writeable 2112 5f535fe1Swdenk 2113 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 2114 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 2115 14f73ca6SStefan Roese this specified memory area will get subtracted from the top 2116 11ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 2117 14f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 2118 14f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 2119 14f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 2120 5e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 2121 14f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 2122 5e12e75dSStefan Roese will have to get fixed in Linux additionally. 2123 14f73ca6SStefan Roese 2124 14f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 2125 14f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 2126 14f73ca6SStefan Roese be touched. 2127 14f73ca6SStefan Roese 2128 14f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 2129 14f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 2130 14f73ca6SStefan Roese then the end address of the Linux memory will be located at a 2131 14f73ca6SStefan Roese non page size aligned address and this could cause major 2132 14f73ca6SStefan Roese problems. 2133 14f73ca6SStefan Roese 2134 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2135 c609719bSwdenk Default load address for network file downloads 2136 c609719bSwdenk 2137 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2138 c609719bSwdenk Enable temporary baudrate change while serial download 2139 c609719bSwdenk 2140 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2141 c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2142 c609719bSwdenk 2143 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2144 c609719bSwdenk Physical start address of Motherboard I/O (if using a 2145 c609719bSwdenk Cogent motherboard) 2146 c609719bSwdenk 2147 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2148 c609719bSwdenk Physical start address of Flash memory. 2149 c609719bSwdenk 2150 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2151 c609719bSwdenk Physical start address of boot monitor code (set by 2152 c609719bSwdenk make config files to be same as the text base address 2153 c609719bSwdenk (TEXT_BASE) used when linking) - same as 2154 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2155 c609719bSwdenk 2156 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 2157 3b57fe0aSwdenk Size of memory reserved for monitor code, used to 2158 3b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 2159 3b57fe0aSwdenk embedded within the U-Boot image, or in a separate 2160 3b57fe0aSwdenk flash sector. 2161 c609719bSwdenk 2162 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2163 c609719bSwdenk Size of DRAM reserved for malloc() use. 2164 c609719bSwdenk 2165 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 2166 15940c9aSStefan Roese Normally compressed uImages are limited to an 2167 15940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 2168 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 2169 15940c9aSStefan Roese to adjust this setting to your needs. 2170 c609719bSwdenk 2171 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2172 c609719bSwdenk Maximum size of memory mapped by the startup code of 2173 c609719bSwdenk the Linux kernel; all data that must be processed by 2174 7d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 2175 7d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 2176 7d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 2177 7d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2178 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. 2179 c609719bSwdenk 2180 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2181 c609719bSwdenk Max number of Flash memory banks 2182 c609719bSwdenk 2183 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2184 c609719bSwdenk Max number of sectors on a Flash chip 2185 c609719bSwdenk 2186 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2187 c609719bSwdenk Timeout for Flash erase operations (in ms) 2188 c609719bSwdenk 2189 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2190 c609719bSwdenk Timeout for Flash write operations (in ms) 2191 c609719bSwdenk 2192 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 2193 8564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 2194 8564acf9Swdenk 2195 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 2196 8564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 2197 8564acf9Swdenk 2198 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 2199 8564acf9Swdenk If defined, hardware flash sectors protection is used 2200 8564acf9Swdenk instead of U-Boot software protection. 2201 8564acf9Swdenk 2202 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2203 c609719bSwdenk 2204 c609719bSwdenk Enable TFTP transfers directly to flash memory; 2205 c609719bSwdenk without this option such a download has to be 2206 c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2207 c609719bSwdenk copy from RAM to flash. 2208 c609719bSwdenk 2209 c609719bSwdenk The two-step approach is usually more reliable, since 2210 c609719bSwdenk you can check if the download worked before you erase 2211 11ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 2212 11ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2213 c609719bSwdenk downloaded image) this option may be very useful. 2214 c609719bSwdenk 2215 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2216 c609719bSwdenk Define if the flash driver uses extra elements in the 2217 5653fc33Swdenk common flash structure for storing flash geometry. 2218 5653fc33Swdenk 2219 00b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 2220 5653fc33Swdenk This option also enables the building of the cfi_flash driver 2221 5653fc33Swdenk in the drivers directory 2222 53cf9435Sstroese 2223 91809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 2224 91809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 2225 91809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 2226 91809ed5SPiotr Ziecik to the MTD layer. 2227 91809ed5SPiotr Ziecik 2228 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 2229 96ef831fSGuennadi Liakhovetski Use buffered writes to flash. 2230 96ef831fSGuennadi Liakhovetski 2231 96ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 2232 96ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 2233 96ef831fSGuennadi Liakhovetski write commands. 2234 96ef831fSGuennadi Liakhovetski 2235 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 2236 5568e613SStefan Roese If this option is defined, the common CFI flash doesn't 2237 5568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 2238 5568e613SStefan Roese is useful, if some of the configured banks are only 2239 5568e613SStefan Roese optionally available. 2240 5568e613SStefan Roese 2241 9a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 2242 9a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 2243 9a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 2244 9a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 2245 9a042e9cSJerry Van Baren 2246 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 2247 11ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 2248 11ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 2249 53cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 2250 53cf9435Sstroese buffers can be full shortly after enabling the interface 2251 11ccc33fSMarcel Ziswiler on high Ethernet traffic. 2252 53cf9435Sstroese Defaults to 4 if not defined. 2253 c609719bSwdenk 2254 c609719bSwdenkThe following definitions that deal with the placement and management 2255 c609719bSwdenkof environment data (variable area); in general, we support the 2256 c609719bSwdenkfollowing configurations: 2257 c609719bSwdenk 2258 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2259 c609719bSwdenk 2260 c609719bSwdenk Define this if the environment is in flash memory. 2261 c609719bSwdenk 2262 c609719bSwdenk a) The environment occupies one whole flash sector, which is 2263 c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2264 c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2265 c609719bSwdenk sector" type flash chips, which have several smaller 2266 c609719bSwdenk sectors at the start or the end. For instance, such a 2267 c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2268 c609719bSwdenk such a case you would place the environment in one of the 2269 c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2270 c609719bSwdenk "top boot sector" type flash chips, you would put the 2271 c609719bSwdenk environment in one of the last sectors, leaving a gap 2272 c609719bSwdenk between U-Boot and the environment. 2273 c609719bSwdenk 2274 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2275 c609719bSwdenk 2276 c609719bSwdenk Offset of environment data (variable area) to the 2277 c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2278 c609719bSwdenk type flash chips the second sector can be used: the offset 2279 c609719bSwdenk for this sector is given here. 2280 c609719bSwdenk 2281 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2282 c609719bSwdenk 2283 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2284 c609719bSwdenk 2285 c609719bSwdenk This is just another way to specify the start address of 2286 c609719bSwdenk the flash sector containing the environment (instead of 2287 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2288 c609719bSwdenk 2289 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2290 c609719bSwdenk 2291 c609719bSwdenk Size of the sector containing the environment. 2292 c609719bSwdenk 2293 c609719bSwdenk 2294 c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2295 c609719bSwdenk In such a case you don't want to spend a whole sector for 2296 c609719bSwdenk the environment. 2297 c609719bSwdenk 2298 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2299 c609719bSwdenk 2300 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 2301 0e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2302 c609719bSwdenk of this flash sector for the environment. This saves 2303 c609719bSwdenk memory for the RAM copy of the environment. 2304 c609719bSwdenk 2305 c609719bSwdenk It may also save flash memory if you decide to use this 2306 c609719bSwdenk when your environment is "embedded" within U-Boot code, 2307 c609719bSwdenk since then the remainder of the flash sector could be used 2308 c609719bSwdenk for U-Boot code. It should be pointed out that this is 2309 c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2310 c609719bSwdenk updating the environment in flash makes it always 2311 c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2312 c609719bSwdenk wrong before the contents has been restored from a copy in 2313 c609719bSwdenk RAM, your target system will be dead. 2314 c609719bSwdenk 2315 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 2316 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2317 c609719bSwdenk 2318 c609719bSwdenk These settings describe a second storage area used to hold 2319 11ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 2320 3e38691eSwdenk a valid backup copy in case there is a power failure during 2321 c609719bSwdenk a "saveenv" operation. 2322 c609719bSwdenk 2323 c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2324 c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2325 c609719bSwdenkaccordingly! 2326 c609719bSwdenk 2327 c609719bSwdenk 2328 9314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2329 c609719bSwdenk 2330 c609719bSwdenk Define this if you have some non-volatile memory device 2331 c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2332 c609719bSwdenk environment. 2333 c609719bSwdenk 2334 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2335 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2336 c609719bSwdenk 2337 11ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2338 c609719bSwdenk want to use for environment. It is assumed that this memory 2339 c609719bSwdenk can just be read and written to, without any special 2340 c609719bSwdenk provision. 2341 c609719bSwdenk 2342 c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2343 c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 2344 11ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2345 c609719bSwdenkU-Boot will hang. 2346 c609719bSwdenk 2347 c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2348 c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2349 c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2350 c609719bSwdenkto save the current settings. 2351 c609719bSwdenk 2352 c609719bSwdenk 2353 bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2354 c609719bSwdenk 2355 c609719bSwdenk Use this if you have an EEPROM or similar serial access 2356 c609719bSwdenk device and a driver for it. 2357 c609719bSwdenk 2358 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2359 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2360 c609719bSwdenk 2361 c609719bSwdenk These two #defines specify the offset and size of the 2362 c609719bSwdenk environment area within the total memory of your EEPROM. 2363 c609719bSwdenk 2364 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2365 c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2366 c609719bSwdenk The default address is zero. 2367 c609719bSwdenk 2368 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2369 c609719bSwdenk If defined, the number of bits used to address bytes in a 2370 c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2371 c609719bSwdenk would require six bits. 2372 c609719bSwdenk 2373 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2374 c609719bSwdenk If defined, the number of milliseconds to delay between 2375 c609719bSwdenk page writes. The default is zero milliseconds. 2376 c609719bSwdenk 2377 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2378 c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2379 c609719bSwdenk that this is NOT the chip address length! 2380 c609719bSwdenk 2381 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 2382 5cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 2383 5cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 2384 5cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 2385 5cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 2386 5cf91d6bSwdenk byte chips. 2387 5cf91d6bSwdenk 2388 5cf91d6bSwdenk Note that we consider the length of the address field to 2389 5cf91d6bSwdenk still be one byte because the extra address bits are hidden 2390 5cf91d6bSwdenk in the chip address. 2391 5cf91d6bSwdenk 2392 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2393 c609719bSwdenk The size in bytes of the EEPROM device. 2394 c609719bSwdenk 2395 c609719bSwdenk 2396 057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 2397 5779d8d9Swdenk 2398 5779d8d9Swdenk Define this if you have a DataFlash memory device which you 2399 5779d8d9Swdenk want to use for the environment. 2400 5779d8d9Swdenk 2401 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2402 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2403 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2404 5779d8d9Swdenk 2405 5779d8d9Swdenk These three #defines specify the offset and size of the 2406 5779d8d9Swdenk environment area within the total memory of your DataFlash placed 2407 5779d8d9Swdenk at the specified address. 2408 5779d8d9Swdenk 2409 51bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 2410 13a5695bSwdenk 2411 13a5695bSwdenk Define this if you have a NAND device which you want to use 2412 13a5695bSwdenk for the environment. 2413 13a5695bSwdenk 2414 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2415 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2416 13a5695bSwdenk 2417 13a5695bSwdenk These two #defines specify the offset and size of the environment 2418 13a5695bSwdenk area within the first NAND device. 2419 5779d8d9Swdenk 2420 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET_REDUND 2421 e443c944SMarkus Klotzbuecher 2422 0e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2423 e443c944SMarkus Klotzbuecher size used to hold a redundant copy of the environment data, 2424 e443c944SMarkus Klotzbuecher so that there is a valid backup copy in case there is a 2425 e443c944SMarkus Klotzbuecher power failure during a "saveenv" operation. 2426 e443c944SMarkus Klotzbuecher 2427 0e8d1586SJean-Christophe PLAGNIOL-VILLARD Note: CONFIG_ENV_OFFSET and CONFIG_ENV_OFFSET_REDUND must be aligned 2428 0e8d1586SJean-Christophe PLAGNIOL-VILLARD to a block boundary, and CONFIG_ENV_SIZE must be a multiple of 2429 e443c944SMarkus Klotzbuecher the NAND devices block size. 2430 e443c944SMarkus Klotzbuecher 2431 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 2432 c609719bSwdenk 2433 c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2434 c609719bSwdenk area is used at an early stage (ROM part) if the environment 2435 c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2436 c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2437 c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2438 c609719bSwdenk to be a good choice since it makes it far enough from the 2439 c609719bSwdenk start of the data area as well as from the stack pointer. 2440 c609719bSwdenk 2441 e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2442 c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2443 c609719bSwdenkcreated; also, when using EEPROM you will have to use getenv_r() 2444 c609719bSwdenkuntil then to read environment variables. 2445 c609719bSwdenk 2446 85ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 2447 85ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 2448 85ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 2449 85ec0bccSwdenknecessary, because the first environment variable we need is the 2450 85ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 2451 85ec0bccSwdenkhave any device yet where we could complain.] 2452 c609719bSwdenk 2453 c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2454 c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 2455 85ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2456 c609719bSwdenk 2457 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 2458 fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2459 fc3e2165Swdenk 2460 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 2461 fc3e2165Swdenk also needs to be defined. 2462 fc3e2165Swdenk 2463 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 2464 fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2465 c609719bSwdenk 2466 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_64BIT_VSPRINTF: 2467 c40b2956Swdenk Makes vsprintf (and all *printf functions) support printing 2468 c40b2956Swdenk of 64bit values by using the L quantifier 2469 c40b2956Swdenk 2470 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_64BIT_STRTOUL: 2471 c40b2956Swdenk Adds simple_strtoull that returns a 64bit value 2472 c40b2956Swdenk 2473 f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 2474 f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 2475 f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 2476 f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 2477 f5675aa5SRon Madrid space for already greatly restricted images, including but not 2478 f5675aa5SRon Madrid limited to NAND_SPL configurations. 2479 f5675aa5SRon Madrid 2480 c609719bSwdenkLow Level (hardware related) configuration options: 2481 dc7c9a1aSwdenk--------------------------------------------------- 2482 c609719bSwdenk 2483 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 2484 c609719bSwdenk Cache Line Size of the CPU. 2485 c609719bSwdenk 2486 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 2487 c609719bSwdenk Default address of the IMMR after system reset. 2488 2535d602Swdenk 2489 2535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 2490 2535d602Swdenk and RPXsuper) to be able to adjust the position of 2491 2535d602Swdenk the IMMR register after a reset. 2492 c609719bSwdenk 2493 7f6c2cbcSwdenk- Floppy Disk Support: 2494 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 2495 7f6c2cbcSwdenk 2496 7f6c2cbcSwdenk the default drive number (default value 0) 2497 7f6c2cbcSwdenk 2498 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 2499 7f6c2cbcSwdenk 2500 11ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 2501 7f6c2cbcSwdenk (default value 1) 2502 7f6c2cbcSwdenk 2503 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 2504 7f6c2cbcSwdenk 2505 7f6c2cbcSwdenk defines the offset of register from address. It 2506 7f6c2cbcSwdenk depends on which part of the data bus is connected to 2507 11ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 2508 7f6c2cbcSwdenk 2509 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 2510 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 2511 7f6c2cbcSwdenk default value. 2512 7f6c2cbcSwdenk 2513 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 2514 7f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 2515 7f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 2516 7f6c2cbcSwdenk source code. It is used to make hardware dependant 2517 7f6c2cbcSwdenk initializations. 2518 7f6c2cbcSwdenk 2519 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 2520 25d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 2521 25d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2522 c609719bSwdenk 2523 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 2524 c609719bSwdenk 2525 7152b1d0Swdenk Start address of memory area that can be used for 2526 c609719bSwdenk initial data and stack; please note that this must be 2527 c609719bSwdenk writable memory that is working WITHOUT special 2528 c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2529 c609719bSwdenk will become available only after programming the 2530 c609719bSwdenk memory controller and running certain initialization 2531 c609719bSwdenk sequences. 2532 c609719bSwdenk 2533 c609719bSwdenk U-Boot uses the following memory types: 2534 c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2535 c609719bSwdenk - MPC824X: data cache 2536 c609719bSwdenk - PPC4xx: data cache 2537 c609719bSwdenk 2538 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 2539 c609719bSwdenk 2540 c609719bSwdenk Offset of the initial data structure in the memory 2541 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 2542 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 2543 c609719bSwdenk data is located at the end of the available space 2544 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD (sometimes written as (CONFIG_SYS_INIT_RAM_END - 2545 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 2546 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 2547 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 2548 c609719bSwdenk 2549 c609719bSwdenk Note: 2550 c609719bSwdenk On the MPC824X (or other systems that use the data 2551 c609719bSwdenk cache for initial memory) the address chosen for 2552 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 2553 c609719bSwdenk point to an otherwise UNUSED address space between 2554 c609719bSwdenk the top of RAM and the start of the PCI space. 2555 c609719bSwdenk 2556 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 2557 c609719bSwdenk 2558 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 2559 c609719bSwdenk 2560 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 2561 c609719bSwdenk 2562 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 2563 c609719bSwdenk 2564 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 2565 c609719bSwdenk 2566 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 2567 c609719bSwdenk 2568 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 2569 c609719bSwdenk SDRAM timing 2570 c609719bSwdenk 2571 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 2572 c609719bSwdenk periodic timer for refresh 2573 c609719bSwdenk 2574 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 2575 c609719bSwdenk 2576 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 2577 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 2578 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 2579 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 2580 c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 2581 c609719bSwdenk 2582 c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 2583 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 2584 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 2585 c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 2586 c609719bSwdenk 2587 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 2588 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 2589 c609719bSwdenk Machine Mode Register and Memory Periodic Timer 2590 c609719bSwdenk Prescaler definitions (SDRAM timing) 2591 c609719bSwdenk 2592 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 2593 c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 2594 c609719bSwdenk define relocation offset in DPRAM [DSP2] 2595 c609719bSwdenk 2596 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 2597 b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 2598 b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 2599 b423d055SHeiko Schocher 2600 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 2601 c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 2602 c609719bSwdenk define relocation offset in DPRAM [SCC4] 2603 c609719bSwdenk 2604 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 2605 c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 2606 c609719bSwdenk wrong setting might damage your board. Read 2607 c609719bSwdenk doc/README.MBX before setting this variable! 2608 c609719bSwdenk 2609 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 2610 ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 2611 ea909b76Swdenk (Power On Self Tests). This definition overrides 2612 ea909b76Swdenk #define'd default value in commproc.h resp. 2613 ea909b76Swdenk cpm_8260.h. 2614 ea909b76Swdenk 2615 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 2616 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 2617 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 2618 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 2619 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 2620 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 2621 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 2622 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 2623 5d232d0eSwdenk Overrides the default PCI memory map in cpu/mpc8260/pci.c if set. 2624 5d232d0eSwdenk 2625 9cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 2626 9cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 2627 9cacf4fcSDirk Eibach required. 2628 9cacf4fcSDirk Eibach 2629 bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 2630 218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 2631 218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 2632 218ca724SWolfgang Denk 2633 bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 2634 bb99ad6dSBen Warren I2C address of the SPD EEPROM 2635 bb99ad6dSBen Warren 2636 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 2637 218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 2638 218ca724SWolfgang Denk one, specify here. Note that the value must resolve 2639 218ca724SWolfgang Denk to something your driver can deal with. 2640 bb99ad6dSBen Warren 2641 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 2642 218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 2643 218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 2644 2ad6b513STimur Tabi 2645 c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 2646 c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 2647 c26e454dSwdenk 2648 c26e454dSwdenk- CONFIG_FEC[12]_PHY 2649 c26e454dSwdenk Define to the hardcoded PHY address which corresponds 2650 6e592385Swdenk to the given FEC; i. e. 2651 c26e454dSwdenk #define CONFIG_FEC1_PHY 4 2652 c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 2653 c26e454dSwdenk 2654 c26e454dSwdenk When set to -1, means to probe for first available. 2655 c26e454dSwdenk 2656 c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 2657 c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 2658 c26e454dSwdenk (so program the FEC to ignore it). 2659 c26e454dSwdenk 2660 c26e454dSwdenk- CONFIG_RMII 2661 c26e454dSwdenk Enable RMII mode for all FECs. 2662 c26e454dSwdenk Note that this is a global option, we can't 2663 c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 2664 c26e454dSwdenk 2665 5cf91d6bSwdenk- CONFIG_CRC32_VERIFY 2666 5cf91d6bSwdenk Add a verify option to the crc32 command. 2667 5cf91d6bSwdenk The syntax is: 2668 5cf91d6bSwdenk 2669 5cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 2670 5cf91d6bSwdenk 2671 5cf91d6bSwdenk Where address/count indicate a memory area 2672 5cf91d6bSwdenk and crc32 is the correct crc32 which the 2673 5cf91d6bSwdenk area should have. 2674 5cf91d6bSwdenk 2675 56523f12Swdenk- CONFIG_LOOPW 2676 56523f12Swdenk Add the "loopw" memory command. This only takes effect if 2677 602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 2678 56523f12Swdenk 2679 7b466641Sstroese- CONFIG_MX_CYCLIC 2680 7b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 2681 7b466641Sstroese "md/mw" commands. 2682 7b466641Sstroese Examples: 2683 7b466641Sstroese 2684 7b466641Sstroese => mdc.b 10 4 500 2685 7b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 2686 7b466641Sstroese 2687 7b466641Sstroese => mwc.l 100 12345678 10 2688 7b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 2689 7b466641Sstroese 2690 7b466641Sstroese This only takes effect if the memory commands are activated 2691 602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 2692 7b466641Sstroese 2693 8aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 2694 8aa1a2d1Swdenk- CONFIG_SKIP_RELOCATE_UBOOT 2695 8aa1a2d1Swdenk 2696 8aa1a2d1Swdenk [ARM only] If these variables are defined, then 2697 8aa1a2d1Swdenk certain low level initializations (like setting up 2698 8aa1a2d1Swdenk the memory controller) are omitted and/or U-Boot does 2699 8aa1a2d1Swdenk not relocate itself into RAM. 2700 8aa1a2d1Swdenk Normally these variables MUST NOT be defined. The 2701 8aa1a2d1Swdenk only exception is when U-Boot is loaded (to RAM) by 2702 8aa1a2d1Swdenk some other boot loader or by a debugger which 2703 11ccc33fSMarcel Ziswiler performs these initializations itself. 2704 8aa1a2d1Swdenk 2705 *df81238bSMagnus Lilja- CONFIG_PRELOADER 2706 *df81238bSMagnus Lilja 2707 *df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 2708 *df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 2709 *df81238bSMagnus Lilja compiling a NAND SPL. 2710 400558b5Swdenk 2711 c609719bSwdenkBuilding the Software: 2712 c609719bSwdenk====================== 2713 c609719bSwdenk 2714 218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 2715 218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 2716 218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 2717 218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 2718 218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 2719 218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 2720 c609719bSwdenk 2721 218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 2722 218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 2723 218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 2724 218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 2725 218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 2726 c609719bSwdenk 2727 218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 2728 218ca724SWolfgang Denk $ export CROSS_COMPILE 2729 c609719bSwdenk 2730 2f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 2731 2f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 2732 2f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 2733 2f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 2734 2f8d396bSPeter Tyser 2735 2f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 2736 2f8d396bSPeter Tyser 2737 2f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 2738 2f8d396bSPeter Tyser be executed on computers running Windows. 2739 2f8d396bSPeter Tyser 2740 c609719bSwdenkU-Boot is intended to be simple to build. After installing the 2741 c609719bSwdenksources you must configure U-Boot for one specific board type. This 2742 c609719bSwdenkis done by typing: 2743 c609719bSwdenk 2744 c609719bSwdenk make NAME_config 2745 c609719bSwdenk 2746 218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 2747 218ca724SWolfgang Denkrations; see the main Makefile for supported names. 2748 54387ac9Swdenk 2749 c609719bSwdenkNote: for some board special configuration names may exist; check if 2750 c609719bSwdenk additional information is available from the board vendor; for 2751 2729af9dSwdenk instance, the TQM823L systems are available without (standard) 2752 2729af9dSwdenk or with LCD support. You can select such additional "features" 2753 11ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 2754 c609719bSwdenk 2755 2729af9dSwdenk make TQM823L_config 2756 2729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 2757 c609719bSwdenk 2758 c609719bSwdenk make TQM823L_LCD_config 2759 c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 2760 c609719bSwdenk 2761 c609719bSwdenk etc. 2762 c609719bSwdenk 2763 c609719bSwdenk 2764 c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 2765 7152b1d0Swdenkimages ready for download to / installation on your system: 2766 c609719bSwdenk 2767 c609719bSwdenk- "u-boot.bin" is a raw binary image 2768 c609719bSwdenk- "u-boot" is an image in ELF binary format 2769 c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 2770 c609719bSwdenk 2771 baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 2772 baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 2773 baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 2774 baf31249SMarian Balakowicz 2775 baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 2776 baf31249SMarian Balakowicz 2777 baf31249SMarian Balakowicz make O=/tmp/build distclean 2778 baf31249SMarian Balakowicz make O=/tmp/build NAME_config 2779 baf31249SMarian Balakowicz make O=/tmp/build all 2780 baf31249SMarian Balakowicz 2781 baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 2782 baf31249SMarian Balakowicz 2783 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2784 baf31249SMarian Balakowicz make distclean 2785 baf31249SMarian Balakowicz make NAME_config 2786 baf31249SMarian Balakowicz make all 2787 baf31249SMarian Balakowicz 2788 baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 2789 baf31249SMarian Balakowiczvariable. 2790 baf31249SMarian Balakowicz 2791 c609719bSwdenk 2792 c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 2793 c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 2794 c609719bSwdenknative "make". 2795 c609719bSwdenk 2796 c609719bSwdenk 2797 c609719bSwdenkIf the system board that you have is not listed, then you will need 2798 c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 2799 c609719bSwdenksteps: 2800 c609719bSwdenk 2801 c609719bSwdenk1. Add a new configuration option for your board to the toplevel 2802 85ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 2803 85ec0bccSwdenk entries as examples. Note that here and at many other places 2804 7152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 2805 85ec0bccSwdenk keep this order. 2806 c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 2807 85ec0bccSwdenk files you need. In your board directory, you will need at least 2808 85ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 2809 85ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 2810 85ec0bccSwdenk your board 2811 c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 2812 c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 2813 85ec0bccSwdenk4. Run "make <board>_config" with your new name. 2814 c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 2815 c609719bSwdenk to be installed on your target system. 2816 85ec0bccSwdenk6. Debug and solve any problems that might arise. 2817 c609719bSwdenk [Of course, this last step is much harder than it sounds.] 2818 c609719bSwdenk 2819 c609719bSwdenk 2820 c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 2821 c609719bSwdenk============================================================== 2822 c609719bSwdenk 2823 c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 2824 c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 2825 c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 2826 c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 2827 218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 2828 c609719bSwdenk 2829 c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 2830 c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 2831 c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 2832 c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 2833 c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 2834 7152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 2835 218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 2836 218ca724SWolfgang Denkyou can type 2837 c609719bSwdenk 2838 c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 2839 c609719bSwdenk 2840 c609719bSwdenkor to build on a native PowerPC system you can type 2841 c609719bSwdenk 2842 c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 2843 c609719bSwdenk 2844 218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 2845 218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 2846 218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 2847 218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 2848 218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 2849 218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 2850 218ca724SWolfgang Denkvariable. For example: 2851 baf31249SMarian Balakowicz 2852 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2853 baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 2854 baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 2855 baf31249SMarian Balakowicz 2856 218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 2857 218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 2858 218ca724SWolfgang Denkduring the whole build process. 2859 baf31249SMarian Balakowicz 2860 baf31249SMarian Balakowicz 2861 c609719bSwdenkSee also "U-Boot Porting Guide" below. 2862 c609719bSwdenk 2863 c609719bSwdenk 2864 c609719bSwdenkMonitor Commands - Overview: 2865 c609719bSwdenk============================ 2866 c609719bSwdenk 2867 c609719bSwdenkgo - start application at address 'addr' 2868 c609719bSwdenkrun - run commands in an environment variable 2869 c609719bSwdenkbootm - boot application image from memory 2870 c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 2871 c609719bSwdenktftpboot- boot image via network using TFTP protocol 2872 c609719bSwdenk and env variables "ipaddr" and "serverip" 2873 c609719bSwdenk (and eventually "gatewayip") 2874 c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 2875 c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 2876 c609719bSwdenkloads - load S-Record file over serial line 2877 c609719bSwdenkloadb - load binary file over serial line (kermit mode) 2878 c609719bSwdenkmd - memory display 2879 c609719bSwdenkmm - memory modify (auto-incrementing) 2880 c609719bSwdenknm - memory modify (constant address) 2881 c609719bSwdenkmw - memory write (fill) 2882 c609719bSwdenkcp - memory copy 2883 c609719bSwdenkcmp - memory compare 2884 c609719bSwdenkcrc32 - checksum calculation 2885 0f89c54bSPeter Tyseri2c - I2C sub-system 2886 c609719bSwdenksspi - SPI utility commands 2887 c609719bSwdenkbase - print or set address offset 2888 c609719bSwdenkprintenv- print environment variables 2889 c609719bSwdenksetenv - set environment variables 2890 c609719bSwdenksaveenv - save environment variables to persistent storage 2891 c609719bSwdenkprotect - enable or disable FLASH write protection 2892 c609719bSwdenkerase - erase FLASH memory 2893 c609719bSwdenkflinfo - print FLASH memory information 2894 c609719bSwdenkbdinfo - print Board Info structure 2895 c609719bSwdenkiminfo - print header information for application image 2896 c609719bSwdenkconinfo - print console devices and informations 2897 c609719bSwdenkide - IDE sub-system 2898 c609719bSwdenkloop - infinite loop on address range 2899 56523f12Swdenkloopw - infinite write loop on address range 2900 c609719bSwdenkmtest - simple RAM test 2901 c609719bSwdenkicache - enable or disable instruction cache 2902 c609719bSwdenkdcache - enable or disable data cache 2903 c609719bSwdenkreset - Perform RESET of the CPU 2904 c609719bSwdenkecho - echo args to console 2905 c609719bSwdenkversion - print monitor version 2906 c609719bSwdenkhelp - print online help 2907 c609719bSwdenk? - alias for 'help' 2908 c609719bSwdenk 2909 c609719bSwdenk 2910 c609719bSwdenkMonitor Commands - Detailed Description: 2911 c609719bSwdenk======================================== 2912 c609719bSwdenk 2913 c609719bSwdenkTODO. 2914 c609719bSwdenk 2915 c609719bSwdenkFor now: just type "help <command>". 2916 c609719bSwdenk 2917 c609719bSwdenk 2918 c609719bSwdenkEnvironment Variables: 2919 c609719bSwdenk====================== 2920 c609719bSwdenk 2921 c609719bSwdenkU-Boot supports user configuration using Environment Variables which 2922 c609719bSwdenkcan be made persistent by saving to Flash memory. 2923 c609719bSwdenk 2924 c609719bSwdenkEnvironment Variables are set using "setenv", printed using 2925 c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 2926 c609719bSwdenkwithout a value can be used to delete a variable from the 2927 c609719bSwdenkenvironment. As long as you don't save the environment you are 2928 c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 2929 c609719bSwdenkenvironment is erased by accident, a default environment is provided. 2930 c609719bSwdenk 2931 c609719bSwdenkSome configuration options can be set using Environment Variables: 2932 c609719bSwdenk 2933 c609719bSwdenk baudrate - see CONFIG_BAUDRATE 2934 c609719bSwdenk 2935 c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 2936 c609719bSwdenk 2937 c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 2938 c609719bSwdenk 2939 c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 2940 c609719bSwdenk 2941 c609719bSwdenk bootfile - Name of the image to load with TFTP 2942 c609719bSwdenk 2943 7d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 2944 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 2945 7d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 2946 7d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 2947 7d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 2948 7d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 2949 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD kernel -- see the description of CONFIG_SYS_BOOTMAPSZ. 2950 7d721e34SBartlomiej Sieka 2951 7d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 2952 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 2953 7d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 2954 7d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 2955 7d721e34SBartlomiej Sieka environment variable. 2956 7d721e34SBartlomiej Sieka 2957 4bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 2958 4bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 2959 4bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 2960 4bae9090SBartlomiej Sieka 2961 c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 2962 c609719bSwdenk "bootp" will just load perform a lookup of the 2963 c609719bSwdenk configuration from the BOOTP server, but not try to 2964 c609719bSwdenk load any image using TFTP 2965 c609719bSwdenk 2966 3310c549SMarian Balakowicz autoscript - if set to "yes" commands like "loadb", "loady", 2967 3310c549SMarian Balakowicz "bootp", "tftpb", "rarpboot" and "nfs" will attempt 2968 3310c549SMarian Balakowicz to automatically run script images (by internally 2969 74de7aefSWolfgang Denk calling "source"). 2970 3310c549SMarian Balakowicz 2971 3310c549SMarian Balakowicz autoscript_uname - if script image is in a format (FIT) this 2972 3310c549SMarian Balakowicz variable is used to get script subimage unit name. 2973 3310c549SMarian Balakowicz 2974 c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 2975 c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 2976 c609719bSwdenk be automatically started (by internally calling 2977 c609719bSwdenk "bootm") 2978 c609719bSwdenk 2979 4a6fd34bSwdenk If set to "no", a standalone image passed to the 2980 4a6fd34bSwdenk "bootm" command will be copied to the load address 2981 4a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 2982 4a6fd34bSwdenk This can be used to load and uncompress arbitrary 2983 4a6fd34bSwdenk data. 2984 4a6fd34bSwdenk 2985 17ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 2986 17ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 2987 17ea1177Swdenk mode (400kHZ). This environment variable is used in 2988 17ea1177Swdenk initialization code. So, for changes to be effective 2989 17ea1177Swdenk it must be saved and board must be reset. 2990 17ea1177Swdenk 2991 c609719bSwdenk initrd_high - restrict positioning of initrd images: 2992 c609719bSwdenk If this variable is not set, initrd images will be 2993 c609719bSwdenk copied to the highest possible address in RAM; this 2994 c609719bSwdenk is usually what you want since it allows for 2995 c609719bSwdenk maximum initrd size. If for some reason you want to 2996 c609719bSwdenk make sure that the initrd image is loaded below the 2997 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 2998 c609719bSwdenk variable to a value of "no" or "off" or "0". 2999 c609719bSwdenk Alternatively, you can set it to a maximum upper 3000 c609719bSwdenk address to use (U-Boot will still check that it 3001 c609719bSwdenk does not overwrite the U-Boot stack and data). 3002 c609719bSwdenk 3003 c609719bSwdenk For instance, when you have a system with 16 MB 3004 7152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3005 c609719bSwdenk you can do this by adding "mem=12M" to the value of 3006 c609719bSwdenk the "bootargs" variable. However, now you must make 3007 7152b1d0Swdenk sure that the initrd image is placed in the first 3008 c609719bSwdenk 12 MB as well - this can be done with 3009 c609719bSwdenk 3010 c609719bSwdenk setenv initrd_high 00c00000 3011 c609719bSwdenk 3012 38b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 3013 38b99261Swdenk indication to U-Boot that all addresses are legal 3014 38b99261Swdenk for the Linux kernel, including addresses in flash 3015 38b99261Swdenk memory. In this case U-Boot will NOT COPY the 3016 38b99261Swdenk ramdisk at all. This may be useful to reduce the 3017 38b99261Swdenk boot time on your system, but requires that this 3018 38b99261Swdenk feature is supported by your Linux kernel. 3019 38b99261Swdenk 3020 c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3021 c609719bSwdenk 3022 c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3023 dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3024 c609719bSwdenk 3025 c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3026 c609719bSwdenk 3027 c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3028 c609719bSwdenk 3029 c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3030 c609719bSwdenk 3031 c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3032 c609719bSwdenk 3033 c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3034 c609719bSwdenk 3035 a3d991bdSwdenk ethprime - When CONFIG_NET_MULTI is enabled controls which 3036 a3d991bdSwdenk interface is used first. 3037 a3d991bdSwdenk 3038 a3d991bdSwdenk ethact - When CONFIG_NET_MULTI is enabled controls which 3039 a3d991bdSwdenk interface is currently active. For example you 3040 a3d991bdSwdenk can do the following 3041 a3d991bdSwdenk 3042 a3d991bdSwdenk => setenv ethact FEC ETHERNET 3043 a3d991bdSwdenk => ping 192.168.0.1 # traffic sent on FEC ETHERNET 3044 a3d991bdSwdenk => setenv ethact SCC ETHERNET 3045 a3d991bdSwdenk => ping 10.0.0.1 # traffic sent on SCC ETHERNET 3046 a3d991bdSwdenk 3047 e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3048 e1692577SMatthias Fuchs available network interfaces. 3049 e1692577SMatthias Fuchs It just stays at the currently selected interface. 3050 e1692577SMatthias Fuchs 3051 a3d991bdSwdenk netretry - When set to "no" each network operation will 3052 a3d991bdSwdenk either succeed or fail without retrying. 3053 6e592385Swdenk When set to "once" the network operation will 3054 6e592385Swdenk fail when all the available network interfaces 3055 6e592385Swdenk are tried once without success. 3056 a3d991bdSwdenk Useful on scripts which control the retry operation 3057 a3d991bdSwdenk themselves. 3058 a3d991bdSwdenk 3059 b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3060 a1cf027aSJean-Christophe PLAGNIOL-VILLARD 3061 28cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3062 ecb0ccd9SWolfgang Denk UDP source port. 3063 ecb0ccd9SWolfgang Denk 3064 28cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 3065 28cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 3066 28cb9375SWolfgang Denk 3067 a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 3068 11ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3069 a3d991bdSwdenk VLAN tagged frames. 3070 c609719bSwdenk 3071 c609719bSwdenkThe following environment variables may be used and automatically 3072 c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3073 c609719bSwdenkdepending the information provided by your boot server: 3074 c609719bSwdenk 3075 c609719bSwdenk bootfile - see above 3076 c609719bSwdenk dnsip - IP address of your Domain Name Server 3077 fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3078 c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3079 c609719bSwdenk hostname - Target hostname 3080 c609719bSwdenk ipaddr - see above 3081 c609719bSwdenk netmask - Subnet Mask 3082 c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3083 c609719bSwdenk serverip - see above 3084 c609719bSwdenk 3085 c609719bSwdenk 3086 c609719bSwdenkThere are two special Environment Variables: 3087 c609719bSwdenk 3088 c609719bSwdenk serial# - contains hardware identification information such 3089 c609719bSwdenk as type string and/or serial number 3090 c609719bSwdenk ethaddr - Ethernet address 3091 c609719bSwdenk 3092 c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3093 c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3094 c609719bSwdenkonce they have been set once. 3095 c609719bSwdenk 3096 c609719bSwdenk 3097 c1551ea8SstroeseFurther special Environment Variables: 3098 c1551ea8Sstroese 3099 c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3100 c1551ea8Sstroese with the "version" command. This variable is 3101 c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3102 c1551ea8Sstroese 3103 c1551ea8Sstroese 3104 c609719bSwdenkPlease note that changes to some configuration parameters may take 3105 c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3106 c609719bSwdenk 3107 c609719bSwdenk 3108 f07771ccSwdenkCommand Line Parsing: 3109 f07771ccSwdenk===================== 3110 f07771ccSwdenk 3111 f07771ccSwdenkThere are two different command line parsers available with U-Boot: 3112 7152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3113 f07771ccSwdenk 3114 f07771ccSwdenkOld, simple command line parser: 3115 f07771ccSwdenk-------------------------------- 3116 f07771ccSwdenk 3117 f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3118 f07771ccSwdenk- several commands on one line, separated by ';' 3119 fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3120 f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3121 f07771ccSwdenk for example: 3122 fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3123 f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3124 f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3125 f07771ccSwdenk 3126 f07771ccSwdenkHush shell: 3127 f07771ccSwdenk----------- 3128 f07771ccSwdenk 3129 f07771ccSwdenk- similar to Bourne shell, with control structures like 3130 f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3131 f07771ccSwdenk until...do...done, ... 3132 f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3133 f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3134 f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3135 f07771ccSwdenk command 3136 f07771ccSwdenk 3137 f07771ccSwdenkGeneral rules: 3138 f07771ccSwdenk-------------- 3139 f07771ccSwdenk 3140 f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3141 f07771ccSwdenk command) contains several commands separated by semicolon, and 3142 f07771ccSwdenk one of these commands fails, then the remaining commands will be 3143 f07771ccSwdenk executed anyway. 3144 f07771ccSwdenk 3145 f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 3146 11ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3147 f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3148 f07771ccSwdenk variables are not executed. 3149 f07771ccSwdenk 3150 c609719bSwdenkNote for Redundant Ethernet Interfaces: 3151 c609719bSwdenk======================================= 3152 c609719bSwdenk 3153 11ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3154 c609719bSwdenksuch configurations and is capable of automatic selection of a 3155 7152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3156 c609719bSwdenk 3157 c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3158 c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3159 c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3160 c609719bSwdenk 3161 c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3162 c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3163 c609719bSwdenkding setting in the environment; if the corresponding environment 3164 c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3165 c609719bSwdenk 3166 c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3167 c609719bSwdenk environment, the SROM's address is used. 3168 c609719bSwdenk 3169 c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3170 c609719bSwdenk environment exists, then the value from the environment variable is 3171 c609719bSwdenk used. 3172 c609719bSwdenk 3173 c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3174 c609719bSwdenk both addresses are the same, this MAC address is used. 3175 c609719bSwdenk 3176 c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3177 c609719bSwdenk addresses differ, the value from the environment is used and a 3178 c609719bSwdenk warning is printed. 3179 c609719bSwdenk 3180 c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3181 c609719bSwdenk is raised. 3182 c609719bSwdenk 3183 c609719bSwdenk 3184 c609719bSwdenkImage Formats: 3185 c609719bSwdenk============== 3186 c609719bSwdenk 3187 3310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 3188 3310c549SMarian Balakowiczimages in two formats: 3189 3310c549SMarian Balakowicz 3190 3310c549SMarian BalakowiczNew uImage format (FIT) 3191 3310c549SMarian Balakowicz----------------------- 3192 3310c549SMarian Balakowicz 3193 3310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 3194 3310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 3195 3310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 3196 3310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 3197 3310c549SMarian Balakowicz 3198 3310c549SMarian Balakowicz 3199 3310c549SMarian BalakowiczOld uImage format 3200 3310c549SMarian Balakowicz----------------- 3201 3310c549SMarian Balakowicz 3202 3310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 3203 3310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 3204 3310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3205 c609719bSwdenk 3206 c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3207 c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3208 f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3209 f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3210 f5ed9e39SPeter Tyser INTEGRITY). 3211 7b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 3212 3d1e8a9dSwdenk IA64, MIPS, NIOS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 3213 7b64fef3SWolfgang Denk Currently supported: ARM, AVR32, Intel x86, MIPS, NIOS, PowerPC). 3214 c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3215 c609719bSwdenk* Load Address 3216 c609719bSwdenk* Entry Point 3217 c609719bSwdenk* Image Name 3218 c609719bSwdenk* Image Timestamp 3219 c609719bSwdenk 3220 c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3221 c609719bSwdenkand the data portions of the image are secured against corruption by 3222 c609719bSwdenkCRC32 checksums. 3223 c609719bSwdenk 3224 c609719bSwdenk 3225 c609719bSwdenkLinux Support: 3226 c609719bSwdenk============== 3227 c609719bSwdenk 3228 c609719bSwdenkAlthough U-Boot should support any OS or standalone application 3229 7152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3230 c609719bSwdenkU-Boot. 3231 c609719bSwdenk 3232 c609719bSwdenkU-Boot includes many features that so far have been part of some 3233 c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3234 c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3235 c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 3236 7152b1d0Swdenkserves several purposes: 3237 c609719bSwdenk 3238 c609719bSwdenk- the same features can be used for other OS or standalone 3239 c609719bSwdenk applications (for instance: using compressed images to reduce the 3240 c609719bSwdenk Flash memory footprint) 3241 c609719bSwdenk 3242 c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 3243 7152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 3244 c609719bSwdenk 3245 c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 3246 c609719bSwdenk images; of course this also means that different kernel images can 3247 c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 3248 c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 3249 c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3250 c609719bSwdenk software is easier now. 3251 c609719bSwdenk 3252 c609719bSwdenk 3253 c609719bSwdenkLinux HOWTO: 3254 c609719bSwdenk============ 3255 c609719bSwdenk 3256 c609719bSwdenkPorting Linux to U-Boot based systems: 3257 c609719bSwdenk--------------------------------------- 3258 c609719bSwdenk 3259 c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3260 c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3261 c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3262 c609719bSwdenkLinux :-). 3263 c609719bSwdenk 3264 c609719bSwdenkBut now you can ignore ALL boot loader code (in arch/ppc/mbxboot). 3265 c609719bSwdenk 3266 c609719bSwdenkJust make sure your machine specific header file (for instance 3267 c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 3268 1dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 3269 1dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 3270 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 3271 c609719bSwdenk 3272 c609719bSwdenk 3273 c609719bSwdenkConfiguring the Linux kernel: 3274 c609719bSwdenk----------------------------- 3275 c609719bSwdenk 3276 c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 3277 c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 3278 c609719bSwdenk 3279 c609719bSwdenk 3280 c609719bSwdenkBuilding a Linux Image: 3281 c609719bSwdenk----------------------- 3282 c609719bSwdenk 3283 24ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 3284 24ee89b9Swdenknot used. If you use recent kernel source, a new build target 3285 24ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 3286 24ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 3287 24ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 3288 24ee89b9Swdenk100% compatible format. 3289 c609719bSwdenk 3290 c609719bSwdenkExample: 3291 c609719bSwdenk 3292 c609719bSwdenk make TQM850L_config 3293 c609719bSwdenk make oldconfig 3294 c609719bSwdenk make dep 3295 24ee89b9Swdenk make uImage 3296 c609719bSwdenk 3297 24ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 3298 24ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 3299 24ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 3300 c609719bSwdenk 3301 24ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 3302 24ee89b9Swdenk 3303 24ee89b9Swdenk* convert the kernel into a raw binary image: 3304 24ee89b9Swdenk 3305 24ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 3306 24ee89b9Swdenk -R .note -R .comment \ 3307 24ee89b9Swdenk -S vmlinux linux.bin 3308 24ee89b9Swdenk 3309 24ee89b9Swdenk* compress the binary image: 3310 24ee89b9Swdenk 3311 24ee89b9Swdenk gzip -9 linux.bin 3312 24ee89b9Swdenk 3313 24ee89b9Swdenk* package compressed binary image for U-Boot: 3314 24ee89b9Swdenk 3315 24ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 3316 24ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 3317 24ee89b9Swdenk -d linux.bin.gz uImage 3318 24ee89b9Swdenk 3319 24ee89b9Swdenk 3320 24ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 3321 24ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 3322 24ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 3323 24ee89b9Swdenkbyte header containing information about target architecture, 3324 24ee89b9Swdenkoperating system, image type, compression method, entry points, time 3325 24ee89b9Swdenkstamp, CRC32 checksums, etc. 3326 24ee89b9Swdenk 3327 24ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 3328 24ee89b9Swdenkprint the header information, or to build new images. 3329 c609719bSwdenk 3330 c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 3331 c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 3332 c609719bSwdenkchecksum verification: 3333 c609719bSwdenk 3334 c609719bSwdenk tools/mkimage -l image 3335 c609719bSwdenk -l ==> list image header information 3336 c609719bSwdenk 3337 c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 3338 c609719bSwdenkfrom a "data file" which is used as image payload: 3339 c609719bSwdenk 3340 c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 3341 c609719bSwdenk -n name -d data_file image 3342 c609719bSwdenk -A ==> set architecture to 'arch' 3343 c609719bSwdenk -O ==> set operating system to 'os' 3344 c609719bSwdenk -T ==> set image type to 'type' 3345 c609719bSwdenk -C ==> set compression type 'comp' 3346 c609719bSwdenk -a ==> set load address to 'addr' (hex) 3347 c609719bSwdenk -e ==> set entry point to 'ep' (hex) 3348 c609719bSwdenk -n ==> set image name to 'name' 3349 c609719bSwdenk -d ==> use image data from 'datafile' 3350 c609719bSwdenk 3351 69459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 3352 69459791Swdenkaddress (0x00000000), but the entry point address depends on the 3353 69459791Swdenkkernel version: 3354 c609719bSwdenk 3355 c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 3356 24ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 3357 c609719bSwdenk 3358 c609719bSwdenkSo a typical call to build a U-Boot image would read: 3359 c609719bSwdenk 3360 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 3361 24ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 3362 24ee89b9Swdenk > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux.gz \ 3363 24ee89b9Swdenk > examples/uImage.TQM850L 3364 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3365 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3366 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3367 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3368 c609719bSwdenk Load Address: 0x00000000 3369 24ee89b9Swdenk Entry Point: 0x00000000 3370 c609719bSwdenk 3371 c609719bSwdenkTo verify the contents of the image (or check for corruption): 3372 c609719bSwdenk 3373 24ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 3374 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3375 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3376 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3377 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3378 c609719bSwdenk Load Address: 0x00000000 3379 24ee89b9Swdenk Entry Point: 0x00000000 3380 c609719bSwdenk 3381 c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 3382 c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3383 c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3384 c609719bSwdenkneed to be uncompressed: 3385 c609719bSwdenk 3386 24ee89b9Swdenk -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux.gz 3387 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 3388 24ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 3389 24ee89b9Swdenk > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux \ 3390 24ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 3391 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3392 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3393 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3394 c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3395 c609719bSwdenk Load Address: 0x00000000 3396 24ee89b9Swdenk Entry Point: 0x00000000 3397 c609719bSwdenk 3398 c609719bSwdenk 3399 c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3400 c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3401 c609719bSwdenk 3402 c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3403 c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3404 c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3405 c609719bSwdenk Image Name: Simple Ramdisk Image 3406 c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3407 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3408 c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3409 c609719bSwdenk Load Address: 0x00000000 3410 c609719bSwdenk Entry Point: 0x00000000 3411 c609719bSwdenk 3412 c609719bSwdenk 3413 c609719bSwdenkInstalling a Linux Image: 3414 c609719bSwdenk------------------------- 3415 c609719bSwdenk 3416 c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3417 c609719bSwdenkyou must convert the image to S-Record format: 3418 c609719bSwdenk 3419 c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3420 c609719bSwdenk 3421 c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3422 c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3423 c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3424 c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3425 c609719bSwdenkcommand. 3426 c609719bSwdenk 3427 c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3428 c609719bSwdenkTQM8xxL is in the first Flash bank): 3429 c609719bSwdenk 3430 c609719bSwdenk => erase 40100000 401FFFFF 3431 c609719bSwdenk 3432 c609719bSwdenk .......... done 3433 c609719bSwdenk Erased 8 sectors 3434 c609719bSwdenk 3435 c609719bSwdenk => loads 40100000 3436 c609719bSwdenk ## Ready for S-Record download ... 3437 c609719bSwdenk ~>examples/image.srec 3438 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3439 c609719bSwdenk ... 3440 c609719bSwdenk 15989 15990 15991 15992 3441 c609719bSwdenk [file transfer complete] 3442 c609719bSwdenk [connected] 3443 c609719bSwdenk ## Start Addr = 0x00000000 3444 c609719bSwdenk 3445 c609719bSwdenk 3446 c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3447 c609719bSwdenkthis includes a checksum verification so you can be sure no data 3448 c609719bSwdenkcorruption happened: 3449 c609719bSwdenk 3450 c609719bSwdenk => imi 40100000 3451 c609719bSwdenk 3452 c609719bSwdenk ## Checking Image at 40100000 ... 3453 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3454 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3455 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3456 c609719bSwdenk Load Address: 00000000 3457 c609719bSwdenk Entry Point: 0000000c 3458 c609719bSwdenk Verifying Checksum ... OK 3459 c609719bSwdenk 3460 c609719bSwdenk 3461 c609719bSwdenkBoot Linux: 3462 c609719bSwdenk----------- 3463 c609719bSwdenk 3464 c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 3465 c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 3466 c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 3467 c609719bSwdenkparameters. You can check and modify this variable using the 3468 c609719bSwdenk"printenv" and "setenv" commands: 3469 c609719bSwdenk 3470 c609719bSwdenk 3471 c609719bSwdenk => printenv bootargs 3472 c609719bSwdenk bootargs=root=/dev/ram 3473 c609719bSwdenk 3474 c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3475 c609719bSwdenk 3476 c609719bSwdenk => printenv bootargs 3477 c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3478 c609719bSwdenk 3479 c609719bSwdenk => bootm 40020000 3480 c609719bSwdenk ## Booting Linux kernel at 40020000 ... 3481 c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 3482 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3483 c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 3484 c609719bSwdenk Load Address: 00000000 3485 c609719bSwdenk Entry Point: 0000000c 3486 c609719bSwdenk Verifying Checksum ... OK 3487 c609719bSwdenk Uncompressing Kernel Image ... OK 3488 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 3489 c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3490 c609719bSwdenk time_init: decrementer frequency = 187500000/60 3491 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3492 c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 3493 c609719bSwdenk ... 3494 c609719bSwdenk 3495 11ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 3496 7152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 3497 c609719bSwdenkformat!) to the "bootm" command: 3498 c609719bSwdenk 3499 c609719bSwdenk => imi 40100000 40200000 3500 c609719bSwdenk 3501 c609719bSwdenk ## Checking Image at 40100000 ... 3502 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3503 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3504 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3505 c609719bSwdenk Load Address: 00000000 3506 c609719bSwdenk Entry Point: 0000000c 3507 c609719bSwdenk Verifying Checksum ... OK 3508 c609719bSwdenk 3509 c609719bSwdenk ## Checking Image at 40200000 ... 3510 c609719bSwdenk Image Name: Simple Ramdisk Image 3511 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3512 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3513 c609719bSwdenk Load Address: 00000000 3514 c609719bSwdenk Entry Point: 00000000 3515 c609719bSwdenk Verifying Checksum ... OK 3516 c609719bSwdenk 3517 c609719bSwdenk => bootm 40100000 40200000 3518 c609719bSwdenk ## Booting Linux kernel at 40100000 ... 3519 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3520 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3521 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3522 c609719bSwdenk Load Address: 00000000 3523 c609719bSwdenk Entry Point: 0000000c 3524 c609719bSwdenk Verifying Checksum ... OK 3525 c609719bSwdenk Uncompressing Kernel Image ... OK 3526 c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 3527 c609719bSwdenk Image Name: Simple Ramdisk Image 3528 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3529 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3530 c609719bSwdenk Load Address: 00000000 3531 c609719bSwdenk Entry Point: 00000000 3532 c609719bSwdenk Verifying Checksum ... OK 3533 c609719bSwdenk Loading Ramdisk ... OK 3534 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 3535 c609719bSwdenk Boot arguments: root=/dev/ram 3536 c609719bSwdenk time_init: decrementer frequency = 187500000/60 3537 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3538 c609719bSwdenk ... 3539 c609719bSwdenk RAMDISK: Compressed image found at block 0 3540 c609719bSwdenk VFS: Mounted root (ext2 filesystem). 3541 c609719bSwdenk 3542 c609719bSwdenk bash# 3543 c609719bSwdenk 3544 0267768eSMatthew McClintockBoot Linux and pass a flat device tree: 3545 0267768eSMatthew McClintock----------- 3546 0267768eSMatthew McClintock 3547 0267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 3548 0267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 3549 0267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 3550 0267768eSMatthew McClintockflat device tree: 3551 0267768eSMatthew McClintock 3552 0267768eSMatthew McClintock=> print oftaddr 3553 0267768eSMatthew McClintockoftaddr=0x300000 3554 0267768eSMatthew McClintock=> print oft 3555 0267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 3556 0267768eSMatthew McClintock=> tftp $oftaddr $oft 3557 0267768eSMatthew McClintockSpeed: 1000, full duplex 3558 0267768eSMatthew McClintockUsing TSEC0 device 3559 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 3560 0267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 3561 0267768eSMatthew McClintockLoad address: 0x300000 3562 0267768eSMatthew McClintockLoading: # 3563 0267768eSMatthew McClintockdone 3564 0267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 3565 0267768eSMatthew McClintock=> tftp $loadaddr $bootfile 3566 0267768eSMatthew McClintockSpeed: 1000, full duplex 3567 0267768eSMatthew McClintockUsing TSEC0 device 3568 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 3569 0267768eSMatthew McClintockFilename 'uImage'. 3570 0267768eSMatthew McClintockLoad address: 0x200000 3571 0267768eSMatthew McClintockLoading:############ 3572 0267768eSMatthew McClintockdone 3573 0267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 3574 0267768eSMatthew McClintock=> print loadaddr 3575 0267768eSMatthew McClintockloadaddr=200000 3576 0267768eSMatthew McClintock=> print oftaddr 3577 0267768eSMatthew McClintockoftaddr=0x300000 3578 0267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 3579 0267768eSMatthew McClintock## Booting image at 00200000 ... 3580 0267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 3581 0267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 3582 0267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 3583 0267768eSMatthew McClintock Load Address: 00000000 3584 0267768eSMatthew McClintock Entry Point: 00000000 3585 0267768eSMatthew McClintock Verifying Checksum ... OK 3586 0267768eSMatthew McClintock Uncompressing Kernel Image ... OK 3587 0267768eSMatthew McClintockBooting using flat device tree at 0x300000 3588 0267768eSMatthew McClintockUsing MPC85xx ADS machine description 3589 0267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 3590 0267768eSMatthew McClintock[snip] 3591 0267768eSMatthew McClintock 3592 0267768eSMatthew McClintock 3593 6069ff26SwdenkMore About U-Boot Image Types: 3594 6069ff26Swdenk------------------------------ 3595 6069ff26Swdenk 3596 6069ff26SwdenkU-Boot supports the following image types: 3597 6069ff26Swdenk 3598 6069ff26Swdenk "Standalone Programs" are directly runnable in the environment 3599 6069ff26Swdenk provided by U-Boot; it is expected that (if they behave 3600 6069ff26Swdenk well) you can continue to work in U-Boot after return from 3601 6069ff26Swdenk the Standalone Program. 3602 6069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 3603 6069ff26Swdenk will take over control completely. Usually these programs 3604 6069ff26Swdenk will install their own set of exception handlers, device 3605 6069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 3606 6069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 3607 6069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 3608 6069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 3609 6069ff26Swdenk being started. 3610 6069ff26Swdenk "Multi-File Images" contain several images, typically an OS 3611 6069ff26Swdenk (Linux) kernel image and one or more data images like 3612 6069ff26Swdenk RAMDisks. This construct is useful for instance when you want 3613 6069ff26Swdenk to boot over the network using BOOTP etc., where the boot 3614 6069ff26Swdenk server provides just a single image file, but you want to get 3615 6069ff26Swdenk for instance an OS kernel and a RAMDisk image. 3616 6069ff26Swdenk 3617 6069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 3618 6069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 3619 6069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 3620 6069ff26Swdenk Immediately after the terminating 0 follow the images, one by 3621 6069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 3622 6069ff26Swdenk a multiple of 4 bytes). 3623 6069ff26Swdenk 3624 6069ff26Swdenk "Firmware Images" are binary images containing firmware (like 3625 6069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 3626 6069ff26Swdenk flash memory. 3627 6069ff26Swdenk 3628 6069ff26Swdenk "Script files" are command sequences that will be executed by 3629 6069ff26Swdenk U-Boot's command interpreter; this feature is especially 3630 6069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 3631 6069ff26Swdenk as command interpreter. 3632 6069ff26Swdenk 3633 c609719bSwdenk 3634 c609719bSwdenkStandalone HOWTO: 3635 c609719bSwdenk================= 3636 c609719bSwdenk 3637 c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 3638 c609719bSwdenkrun "standalone" applications, which can use some resources of 3639 c609719bSwdenkU-Boot like console I/O functions or interrupt services. 3640 c609719bSwdenk 3641 c609719bSwdenkTwo simple examples are included with the sources: 3642 c609719bSwdenk 3643 c609719bSwdenk"Hello World" Demo: 3644 c609719bSwdenk------------------- 3645 c609719bSwdenk 3646 c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 3647 c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 3648 c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 3649 c609719bSwdenklike that: 3650 c609719bSwdenk 3651 c609719bSwdenk => loads 3652 c609719bSwdenk ## Ready for S-Record download ... 3653 c609719bSwdenk ~>examples/hello_world.srec 3654 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3655 c609719bSwdenk [file transfer complete] 3656 c609719bSwdenk [connected] 3657 c609719bSwdenk ## Start Addr = 0x00040004 3658 c609719bSwdenk 3659 c609719bSwdenk => go 40004 Hello World! This is a test. 3660 c609719bSwdenk ## Starting application at 0x00040004 ... 3661 c609719bSwdenk Hello World 3662 c609719bSwdenk argc = 7 3663 c609719bSwdenk argv[0] = "40004" 3664 c609719bSwdenk argv[1] = "Hello" 3665 c609719bSwdenk argv[2] = "World!" 3666 c609719bSwdenk argv[3] = "This" 3667 c609719bSwdenk argv[4] = "is" 3668 c609719bSwdenk argv[5] = "a" 3669 c609719bSwdenk argv[6] = "test." 3670 c609719bSwdenk argv[7] = "<NULL>" 3671 c609719bSwdenk Hit any key to exit ... 3672 c609719bSwdenk 3673 c609719bSwdenk ## Application terminated, rc = 0x0 3674 c609719bSwdenk 3675 c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 3676 c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 3677 c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 3678 c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 3679 c609719bSwdenkcharacter, but this is just a demo program. The application can be 3680 c609719bSwdenkcontrolled by the following keys: 3681 c609719bSwdenk 3682 c609719bSwdenk ? - print current values og the CPM Timer registers 3683 c609719bSwdenk b - enable interrupts and start timer 3684 c609719bSwdenk e - stop timer and disable interrupts 3685 c609719bSwdenk q - quit application 3686 c609719bSwdenk 3687 c609719bSwdenk => loads 3688 c609719bSwdenk ## Ready for S-Record download ... 3689 c609719bSwdenk ~>examples/timer.srec 3690 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3691 c609719bSwdenk [file transfer complete] 3692 c609719bSwdenk [connected] 3693 c609719bSwdenk ## Start Addr = 0x00040004 3694 c609719bSwdenk 3695 c609719bSwdenk => go 40004 3696 c609719bSwdenk ## Starting application at 0x00040004 ... 3697 c609719bSwdenk TIMERS=0xfff00980 3698 c609719bSwdenk Using timer 1 3699 c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 3700 c609719bSwdenk 3701 c609719bSwdenkHit 'b': 3702 c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 3703 c609719bSwdenk Enabling timer 3704 c609719bSwdenkHit '?': 3705 c609719bSwdenk [q, b, e, ?] ........ 3706 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 3707 c609719bSwdenkHit '?': 3708 c609719bSwdenk [q, b, e, ?] . 3709 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 3710 c609719bSwdenkHit '?': 3711 c609719bSwdenk [q, b, e, ?] . 3712 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 3713 c609719bSwdenkHit '?': 3714 c609719bSwdenk [q, b, e, ?] . 3715 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 3716 c609719bSwdenkHit 'e': 3717 c609719bSwdenk [q, b, e, ?] ...Stopping timer 3718 c609719bSwdenkHit 'q': 3719 c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 3720 c609719bSwdenk 3721 c609719bSwdenk 3722 85ec0bccSwdenkMinicom warning: 3723 85ec0bccSwdenk================ 3724 85ec0bccSwdenk 3725 7152b1d0SwdenkOver time, many people have reported problems when trying to use the 3726 85ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 3727 85ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 3728 f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 3729 85ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 3730 85ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 3731 85ec0bccSwdenk 3732 52f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 3733 52f52c14Swdenkconfiguration to your "File transfer protocols" section: 3734 52f52c14Swdenk 3735 52f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 3736 52f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 3737 52f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 3738 52f52c14Swdenk 3739 52f52c14Swdenk 3740 c609719bSwdenkNetBSD Notes: 3741 c609719bSwdenk============= 3742 c609719bSwdenk 3743 c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 3744 c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 3745 c609719bSwdenk 3746 c609719bSwdenkBuilding requires a cross environment; it is known to work on 3747 c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 3748 c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 3749 c609719bSwdenkNote that the cross-powerpc package does not install include files; 3750 c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 3751 c609719bSwdenkmissing. This file has to be installed and patched manually: 3752 c609719bSwdenk 3753 c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 3754 c609719bSwdenk # mkdir powerpc 3755 c609719bSwdenk # ln -s powerpc machine 3756 c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 3757 c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 3758 c609719bSwdenk 3759 c609719bSwdenkNative builds *don't* work due to incompatibilities between native 3760 c609719bSwdenkand U-Boot include files. 3761 c609719bSwdenk 3762 c609719bSwdenkBooting assumes that (the first part of) the image booted is a 3763 c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 3764 c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 3765 c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 3766 2a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 3767 c609719bSwdenk 3768 c609719bSwdenk 3769 c609719bSwdenkImplementation Internals: 3770 c609719bSwdenk========================= 3771 c609719bSwdenk 3772 c609719bSwdenkThe following is not intended to be a complete description of every 3773 c609719bSwdenkimplementation detail. However, it should help to understand the 3774 c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 3775 c609719bSwdenkhardware. 3776 c609719bSwdenk 3777 c609719bSwdenk 3778 c609719bSwdenkInitial Stack, Global Data: 3779 c609719bSwdenk--------------------------- 3780 c609719bSwdenk 3781 c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 3782 c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 3783 c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 3784 c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 3785 c609719bSwdenkis not initialized as zero. To be able to get a C environment working 3786 c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 3787 c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 3788 c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 3789 c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 3790 c609719bSwdenklocked as (mis-) used as memory, etc. 3791 c609719bSwdenk 3792 7152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 3793 0668236bSWolfgang Denk U-Boot mailing list: 3794 43d9616cSwdenk 3795 43d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 3796 43d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 3797 43d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 3798 43d9616cSwdenk ... 3799 43d9616cSwdenk 3800 43d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 3801 43d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 3802 43d9616cSwdenk require any physical RAM backing up the cache. The cleverness 3803 43d9616cSwdenk is that the cache is being used as a temporary supply of 3804 43d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 3805 11ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 3806 43d9616cSwdenk can see how this works by studying the cache architecture and 3807 43d9616cSwdenk operation in the architecture and processor-specific manuals. 3808 43d9616cSwdenk 3809 43d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 3810 43d9616cSwdenk is another option for the system designer to use as an 3811 11ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 3812 43d9616cSwdenk option should work for you. Using CS 4 should be fine if your 3813 43d9616cSwdenk board designers haven't used it for something that would 3814 43d9616cSwdenk cause you grief during the initial boot! It is frequently not 3815 43d9616cSwdenk used. 3816 43d9616cSwdenk 3817 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 3818 43d9616cSwdenk with your processor/board/system design. The default value 3819 43d9616cSwdenk you will find in any recent u-boot distribution in 3820 8a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 3821 43d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 3822 43d9616cSwdenk it above 400_0000. Just make sure your board has no resources 3823 43d9616cSwdenk that are supposed to respond to that address! That code in 3824 43d9616cSwdenk start.S has been around a while and should work as is when 3825 43d9616cSwdenk you get the config right. 3826 43d9616cSwdenk 3827 43d9616cSwdenk -Chris Hallinan 3828 43d9616cSwdenk DS4.COM, Inc. 3829 43d9616cSwdenk 3830 c609719bSwdenkIt is essential to remember this, since it has some impact on the C 3831 c609719bSwdenkcode for the initialization procedures: 3832 c609719bSwdenk 3833 c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 3834 c609719bSwdenk to write it. 3835 c609719bSwdenk 3836 11ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 3837 c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 3838 7152b1d0Swdenk zation is performed later (when relocating to RAM). 3839 c609719bSwdenk 3840 c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 3841 c609719bSwdenk that. 3842 c609719bSwdenk 3843 c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 3844 c609719bSwdenknormal global data to share information beween the code. But it 3845 c609719bSwdenkturned out that the implementation of U-Boot can be greatly 3846 c609719bSwdenksimplified by making a global data structure (gd_t) available to all 3847 c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 3848 c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 3849 c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 3850 c609719bSwdenkplace a pointer (gd) to the global data into a register which we 3851 c609719bSwdenkreserve for this purpose. 3852 c609719bSwdenk 3853 7152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 3854 c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 3855 c609719bSwdenkGCC's implementation. 3856 c609719bSwdenk 3857 c609719bSwdenkFor PowerPC, the following registers have specific use: 3858 c609719bSwdenk R1: stack pointer 3859 e7670f6cSWolfgang Denk R2: reserved for system use 3860 c609719bSwdenk R3-R4: parameter passing and return values 3861 c609719bSwdenk R5-R10: parameter passing 3862 c609719bSwdenk R13: small data area pointer 3863 c609719bSwdenk R30: GOT pointer 3864 c609719bSwdenk R31: frame pointer 3865 c609719bSwdenk 3866 c609719bSwdenk (U-Boot also uses R14 as internal GOT pointer.) 3867 c609719bSwdenk 3868 e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 3869 c609719bSwdenk 3870 c609719bSwdenk Note: on PPC, we could use a static initializer (since the 3871 c609719bSwdenk address of the global data structure is known at compile time), 3872 c609719bSwdenk but it turned out that reserving a register results in somewhat 3873 c609719bSwdenk smaller code - although the code savings are not that big (on 3874 c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 3875 c609719bSwdenk 624 text + 127 data). 3876 c609719bSwdenk 3877 4c58eb55SMike FrysingerOn Blackfin, the normal C ABI (except for P5) is followed as documented here: 3878 4c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 3879 4c58eb55SMike Frysinger 3880 4c58eb55SMike Frysinger ==> U-Boot will use P5 to hold a pointer to the global data 3881 4c58eb55SMike Frysinger 3882 c609719bSwdenkOn ARM, the following registers are used: 3883 c609719bSwdenk 3884 c609719bSwdenk R0: function argument word/integer result 3885 c609719bSwdenk R1-R3: function argument word 3886 c609719bSwdenk R9: GOT pointer 3887 c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 3888 c609719bSwdenk R11: argument (frame) pointer 3889 c609719bSwdenk R12: temporary workspace 3890 c609719bSwdenk R13: stack pointer 3891 c609719bSwdenk R14: link register 3892 c609719bSwdenk R15: program counter 3893 c609719bSwdenk 3894 c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 3895 c609719bSwdenk 3896 d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 3897 d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 3898 c609719bSwdenk 3899 c609719bSwdenkMemory Management: 3900 c609719bSwdenk------------------ 3901 c609719bSwdenk 3902 c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 3903 c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 3904 c609719bSwdenk 3905 c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 3906 c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 3907 c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 3908 c609719bSwdenkphysical memory banks. 3909 c609719bSwdenk 3910 c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 3911 c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 3912 c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 3913 c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 3914 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 3915 c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 3916 c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 3917 c609719bSwdenk 3918 c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 3919 c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 3920 c609719bSwdenk 3921 c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 3922 c609719bSwdenkthis: 3923 c609719bSwdenk 3924 c609719bSwdenk 0x0000 0000 Exception Vector code 3925 c609719bSwdenk : 3926 c609719bSwdenk 0x0000 1FFF 3927 c609719bSwdenk 0x0000 2000 Free for Application Use 3928 c609719bSwdenk : 3929 c609719bSwdenk : 3930 c609719bSwdenk 3931 c609719bSwdenk : 3932 c609719bSwdenk : 3933 c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 3934 c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 3935 c609719bSwdenk 0x00FC 0000 Malloc Arena 3936 c609719bSwdenk : 3937 c609719bSwdenk 0x00FD FFFF 3938 c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 3939 c609719bSwdenk ... eventually: LCD or video framebuffer 3940 c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 3941 c609719bSwdenk 0x00FF FFFF [End of RAM] 3942 c609719bSwdenk 3943 c609719bSwdenk 3944 c609719bSwdenkSystem Initialization: 3945 c609719bSwdenk---------------------- 3946 c609719bSwdenk 3947 c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 3948 11ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 3949 c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 3950 7152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 3951 c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 3952 c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 3953 c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 3954 c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 3955 c609719bSwdenkthe caches and the SIU. 3956 c609719bSwdenk 3957 c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 3958 c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 3959 c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 3960 c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 3961 c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 3962 c609719bSwdenksimple memory test is run that determines the size of the SDRAM 3963 c609719bSwdenkbanks. 3964 c609719bSwdenk 3965 c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 3966 7152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 3967 c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 3968 c609719bSwdenk0x00000000, with any additional banks following immediately to create 3969 c609719bSwdenkcontiguous memory starting from 0. 3970 c609719bSwdenk 3971 c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 3972 c609719bSwdenkand allocates memory for use by malloc() and for the global Board 3973 c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 3974 c609719bSwdenkpages, and the final stack is set up. 3975 c609719bSwdenk 3976 c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 3977 c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 3978 c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 3979 c609719bSwdenknew address in RAM. 3980 c609719bSwdenk 3981 c609719bSwdenk 3982 c609719bSwdenkU-Boot Porting Guide: 3983 c609719bSwdenk---------------------- 3984 c609719bSwdenk 3985 c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 3986 6aff3115Swdenklist, October 2002] 3987 c609719bSwdenk 3988 c609719bSwdenk 3989 c609719bSwdenkint main (int argc, char *argv[]) 3990 c609719bSwdenk{ 3991 c609719bSwdenk sighandler_t no_more_time; 3992 c609719bSwdenk 3993 c609719bSwdenk signal (SIGALRM, no_more_time); 3994 c609719bSwdenk alarm (PROJECT_DEADLINE - toSec (3 * WEEK)); 3995 c609719bSwdenk 3996 c609719bSwdenk if (available_money > available_manpower) { 3997 c609719bSwdenk pay consultant to port U-Boot; 3998 c609719bSwdenk return 0; 3999 c609719bSwdenk } 4000 c609719bSwdenk 4001 c609719bSwdenk Download latest U-Boot source; 4002 c609719bSwdenk 4003 0668236bSWolfgang Denk Subscribe to u-boot mailing list; 4004 6aff3115Swdenk 4005 c609719bSwdenk if (clueless) { 4006 c609719bSwdenk email ("Hi, I am new to U-Boot, how do I get started?"); 4007 c609719bSwdenk } 4008 c609719bSwdenk 4009 c609719bSwdenk while (learning) { 4010 c609719bSwdenk Read the README file in the top level directory; 4011 7cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual ; 4012 c609719bSwdenk Read the source, Luke; 4013 c609719bSwdenk } 4014 c609719bSwdenk 4015 c609719bSwdenk if (available_money > toLocalCurrency ($2500)) { 4016 c609719bSwdenk Buy a BDI2000; 4017 c609719bSwdenk } else { 4018 c609719bSwdenk Add a lot of aggravation and time; 4019 c609719bSwdenk } 4020 c609719bSwdenk 4021 c609719bSwdenk Create your own board support subdirectory; 4022 c609719bSwdenk 4023 6aff3115Swdenk Create your own board config file; 4024 6aff3115Swdenk 4025 c609719bSwdenk while (!running) { 4026 c609719bSwdenk do { 4027 c609719bSwdenk Add / modify source code; 4028 c609719bSwdenk } until (compiles); 4029 c609719bSwdenk Debug; 4030 c609719bSwdenk if (clueless) 4031 c609719bSwdenk email ("Hi, I am having problems..."); 4032 c609719bSwdenk } 4033 c609719bSwdenk Send patch file to Wolfgang; 4034 c609719bSwdenk 4035 c609719bSwdenk return 0; 4036 c609719bSwdenk} 4037 c609719bSwdenk 4038 c609719bSwdenkvoid no_more_time (int sig) 4039 c609719bSwdenk{ 4040 c609719bSwdenk hire_a_guru(); 4041 c609719bSwdenk} 4042 c609719bSwdenk 4043 c609719bSwdenk 4044 c609719bSwdenkCoding Standards: 4045 c609719bSwdenk----------------- 4046 c609719bSwdenk 4047 c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 4048 2c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 4049 2c051651SDetlev Zundel"scripts/Lindent" in your Linux kernel source directory. In sources 4050 2c051651SDetlev Zundeloriginating from U-Boot a style corresponding to "Lindent -pcs" (adding 4051 2c051651SDetlev Zundelspaces before parameters to function calls) is actually used. 4052 c609719bSwdenk 4053 2c051651SDetlev ZundelSource files originating from a different project (for example the 4054 2c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 4055 2c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 4056 2c051651SDetlev Zundelsources. 4057 2c051651SDetlev Zundel 4058 2c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 4059 2c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 4060 2c051651SDetlev Zundelin your code. 4061 c609719bSwdenk 4062 c178d3daSwdenkPlease also stick to the following formatting rules: 4063 180d3f74Swdenk- remove any trailing white space 4064 180d3f74Swdenk- use TAB characters for indentation, not spaces 4065 180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 4066 180d3f74Swdenk- do not add more than 2 empty lines to source files 4067 180d3f74Swdenk- do not add trailing empty lines to source files 4068 180d3f74Swdenk 4069 c609719bSwdenkSubmissions which do not conform to the standards may be returned 4070 c609719bSwdenkwith a request to reformat the changes. 4071 c609719bSwdenk 4072 c609719bSwdenk 4073 c609719bSwdenkSubmitting Patches: 4074 c609719bSwdenk------------------- 4075 c609719bSwdenk 4076 c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4077 c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4078 c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4079 c609719bSwdenk 4080 0d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4081 218ca724SWolfgang Denk 4082 0668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 4083 0668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 4084 0668236bSWolfgang Denk 4085 c609719bSwdenkWhen you send a patch, please include the following information with 4086 c609719bSwdenkit: 4087 c609719bSwdenk 4088 c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4089 c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4090 c609719bSwdenk patch actually fixes something. 4091 c609719bSwdenk 4092 c609719bSwdenk* For new features: a description of the feature and your 4093 c609719bSwdenk implementation. 4094 c609719bSwdenk 4095 c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4096 c609719bSwdenk 4097 c609719bSwdenk* For major contributions, your entry to the CREDITS file 4098 c609719bSwdenk 4099 c609719bSwdenk* When you add support for a new board, don't forget to add this 4100 c609719bSwdenk board to the MAKEALL script, too. 4101 c609719bSwdenk 4102 c609719bSwdenk* If your patch adds new configuration options, don't forget to 4103 c609719bSwdenk document these in the README file. 4104 c609719bSwdenk 4105 218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4106 218ca724SWolfgang Denk recommended) you can easily generate the patch using the 4107 218ca724SWolfgang Denk "git-format-patch". If you then use "git-send-email" to send it to 4108 218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4109 218ca724SWolfgang Denk with some other mail clients. 4110 c609719bSwdenk 4111 218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4112 218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4113 218ca724SWolfgang Denk GNU diff. 4114 6dff5529Swdenk 4115 218ca724SWolfgang Denk The current directory when running this command shall be the parent 4116 218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4117 218ca724SWolfgang Denk your patch includes sufficient directory information for the 4118 218ca724SWolfgang Denk affected files). 4119 218ca724SWolfgang Denk 4120 218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4121 218ca724SWolfgang Denk and compressed attachments must not be used. 4122 c609719bSwdenk 4123 52f52c14Swdenk* If one logical set of modifications affects or creates several 4124 52f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 4125 52f52c14Swdenk 4126 52f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 4127 52f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 4128 52f52c14Swdenk 4129 52f52c14Swdenk 4130 c609719bSwdenkNotes: 4131 c609719bSwdenk 4132 c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4133 c609719bSwdenk source tree and make sure that no errors or warnings are reported 4134 c609719bSwdenk for any of the boards. 4135 c609719bSwdenk 4136 c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4137 c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4138 c609719bSwdenk returned with a request to re-formatting / split it. 4139 c609719bSwdenk 4140 c609719bSwdenk* If you modify existing code, make sure that your new code does not 4141 c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4142 c609719bSwdenk When adding new features, these should compile conditionally only 4143 c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4144 c609719bSwdenk disabled must not need more memory than the old code without your 4145 c609719bSwdenk modification. 4146 90dc6704Swdenk 4147 0668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 4148 0668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 4149 0668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 4150 0668236bSWolfgang Denk bigger than the size limit should be avoided. 4151