1 c609719bSwdenk# 2 6abe6fb6SDetlev Zundel# (C) Copyright 2000 - 2011 3 c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 c609719bSwdenk# 5 c609719bSwdenk# See file CREDITS for list of people who contributed to this 6 c609719bSwdenk# project. 7 c609719bSwdenk# 8 c609719bSwdenk# This program is free software; you can redistribute it and/or 9 c609719bSwdenk# modify it under the terms of the GNU General Public License as 10 c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11 c609719bSwdenk# the License, or (at your option) any later version. 12 c609719bSwdenk# 13 c609719bSwdenk# This program is distributed in the hope that it will be useful, 14 c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15 c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 c609719bSwdenk# GNU General Public License for more details. 17 c609719bSwdenk# 18 c609719bSwdenk# You should have received a copy of the GNU General Public License 19 c609719bSwdenk# along with this program; if not, write to the Free Software 20 c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 c609719bSwdenk# MA 02111-1307 USA 22 c609719bSwdenk# 23 c609719bSwdenk 24 c609719bSwdenkSummary: 25 c609719bSwdenk======== 26 c609719bSwdenk 27 24ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28 e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29 e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30 e86e5a07Swdenkinitialize and test the hardware or to download and run application 31 e86e5a07Swdenkcode. 32 c609719bSwdenk 33 c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 34 24ee89b9Swdenkthe source code originate in the Linux source tree, we have some 35 24ee89b9Swdenkheader files in common, and special provision has been made to 36 c609719bSwdenksupport booting of Linux images. 37 c609719bSwdenk 38 c609719bSwdenkSome attention has been paid to make this software easily 39 c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40 c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41 c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42 c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43 c609719bSwdenkload and run it dynamically. 44 c609719bSwdenk 45 c609719bSwdenk 46 c609719bSwdenkStatus: 47 c609719bSwdenk======= 48 c609719bSwdenk 49 c609719bSwdenkIn general, all boards for which a configuration option exists in the 50 c609719bSwdenkMakefile have been tested to some extent and can be considered 51 c609719bSwdenk"working". In fact, many of them are used in production systems. 52 c609719bSwdenk 53 c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54 218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55 218ca724SWolfgang Denkmaintainers. 56 c609719bSwdenk 57 c609719bSwdenk 58 c609719bSwdenkWhere to get help: 59 c609719bSwdenk================== 60 c609719bSwdenk 61 c609719bSwdenkIn case you have questions about, problems with or contributions for 62 c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 63 0c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 64 0c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 65 0c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 66 0c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 67 c609719bSwdenk 68 c609719bSwdenk 69 218ca724SWolfgang DenkWhere to get source code: 70 218ca724SWolfgang Denk========================= 71 218ca724SWolfgang Denk 72 218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73 218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74 218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75 218ca724SWolfgang Denk 76 218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 77 11ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 78 218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79 218ca724SWolfgang Denkdirectory. 80 218ca724SWolfgang Denk 81 d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82 218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83 218ca724SWolfgang Denk 84 218ca724SWolfgang Denk 85 c609719bSwdenkWhere we come from: 86 c609719bSwdenk=================== 87 c609719bSwdenk 88 c609719bSwdenk- start from 8xxrom sources 89 24ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90 c609719bSwdenk- clean up code 91 c609719bSwdenk- make it easier to add custom boards 92 c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93 c609719bSwdenk- extend functions, especially: 94 c609719bSwdenk * Provide extended interface to Linux boot loader 95 c609719bSwdenk * S-Record download 96 c609719bSwdenk * network boot 97 11ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 98 24ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99 c609719bSwdenk- add other CPU families (starting with ARM) 100 24ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 101 0d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 102 24ee89b9Swdenk 103 24ee89b9Swdenk 104 24ee89b9SwdenkNames and Spelling: 105 24ee89b9Swdenk=================== 106 24ee89b9Swdenk 107 24ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 108 24ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 109 24ee89b9Swdenkin source files etc.). Example: 110 24ee89b9Swdenk 111 24ee89b9Swdenk This is the README file for the U-Boot project. 112 24ee89b9Swdenk 113 24ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 114 24ee89b9Swdenk 115 24ee89b9Swdenk include/asm-ppc/u-boot.h 116 24ee89b9Swdenk 117 24ee89b9Swdenk #include <asm/u-boot.h> 118 24ee89b9Swdenk 119 24ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 120 24ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 121 24ee89b9Swdenk 122 24ee89b9Swdenk U_BOOT_VERSION u_boot_logo 123 24ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124 c609719bSwdenk 125 c609719bSwdenk 126 93f19cc0SwdenkVersioning: 127 93f19cc0Swdenk=========== 128 93f19cc0Swdenk 129 360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 130 360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 131 360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 132 360d883aSThomas Webernames consisting of the calendar year and month of the release date. 133 360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 134 360d883aSThomas Weberreleases in "stable" maintenance trees. 135 93f19cc0Swdenk 136 360d883aSThomas WeberExamples: 137 360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 138 360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 139 360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 140 93f19cc0Swdenk 141 93f19cc0Swdenk 142 c609719bSwdenkDirectory Hierarchy: 143 c609719bSwdenk==================== 144 c609719bSwdenk 145 8d321b81SPeter Tyser/arch Architecture specific files 146 8d321b81SPeter Tyser /arm Files generic to ARM architecture 147 8d321b81SPeter Tyser /cpu CPU specific files 148 8d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 149 8d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 150 6eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 151 8d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 152 8d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 153 8d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 154 8d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 155 8d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 156 8d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 157 8d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 158 8d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 159 8d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 160 8d321b81SPeter Tyser /lib Architecture specific library files 161 8d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 162 8d321b81SPeter Tyser /cpu CPU specific files 163 8d321b81SPeter Tyser /lib Architecture specific library files 164 8d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 165 8d321b81SPeter Tyser /cpu CPU specific files 166 8d321b81SPeter Tyser /lib Architecture specific library files 167 fea25720SGraeme Russ /x86 Files generic to x86 architecture 168 8d321b81SPeter Tyser /cpu CPU specific files 169 8d321b81SPeter Tyser /lib Architecture specific library files 170 8d321b81SPeter Tyser /m68k Files generic to m68k architecture 171 8d321b81SPeter Tyser /cpu CPU specific files 172 8d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 173 8d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 174 8d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 175 8d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 176 8d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 177 8d321b81SPeter Tyser /lib Architecture specific library files 178 8d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 179 8d321b81SPeter Tyser /cpu CPU specific files 180 8d321b81SPeter Tyser /lib Architecture specific library files 181 8d321b81SPeter Tyser /mips Files generic to MIPS architecture 182 8d321b81SPeter Tyser /cpu CPU specific files 183 92bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 184 8d321b81SPeter Tyser /lib Architecture specific library files 185 8d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 186 8d321b81SPeter Tyser /cpu CPU specific files 187 8d321b81SPeter Tyser /lib Architecture specific library files 188 a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 189 8d321b81SPeter Tyser /cpu CPU specific files 190 8d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 191 8d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 192 8d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 193 8d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 194 8d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 195 8d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 196 8d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 197 8d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 198 8d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 199 8d321b81SPeter Tyser /lib Architecture specific library files 200 8d321b81SPeter Tyser /sh Files generic to SH architecture 201 8d321b81SPeter Tyser /cpu CPU specific files 202 8d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 203 8d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 204 8d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 205 8d321b81SPeter Tyser /lib Architecture specific library files 206 8d321b81SPeter Tyser /sparc Files generic to SPARC architecture 207 8d321b81SPeter Tyser /cpu CPU specific files 208 8d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 209 8d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 210 8d321b81SPeter Tyser /lib Architecture specific library files 211 8d321b81SPeter Tyser/api Machine/arch independent API for external apps 212 8d321b81SPeter Tyser/board Board dependent files 213 8d321b81SPeter Tyser/common Misc architecture independent functions 214 8d321b81SPeter Tyser/disk Code for disk drive partition handling 215 8d321b81SPeter Tyser/doc Documentation (don't expect too much) 216 8d321b81SPeter Tyser/drivers Commonly used device drivers 217 8d321b81SPeter Tyser/examples Example code for standalone applications, etc. 218 8d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 219 8d321b81SPeter Tyser/include Header Files 220 8d321b81SPeter Tyser/lib Files generic to all architectures 221 8d321b81SPeter Tyser /libfdt Library files to support flattened device trees 222 8d321b81SPeter Tyser /lzma Library files to support LZMA decompression 223 8d321b81SPeter Tyser /lzo Library files to support LZO decompression 224 8d321b81SPeter Tyser/net Networking code 225 8d321b81SPeter Tyser/post Power On Self Test 226 8d321b81SPeter Tyser/rtc Real Time Clock drivers 227 8d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 228 c609719bSwdenk 229 c609719bSwdenkSoftware Configuration: 230 c609719bSwdenk======================= 231 c609719bSwdenk 232 c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 233 c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 234 c609719bSwdenk 235 c609719bSwdenkThere are two classes of configuration variables: 236 c609719bSwdenk 237 c609719bSwdenk* Configuration _OPTIONS_: 238 c609719bSwdenk These are selectable by the user and have names beginning with 239 c609719bSwdenk "CONFIG_". 240 c609719bSwdenk 241 c609719bSwdenk* Configuration _SETTINGS_: 242 c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 243 c609719bSwdenk you don't know what you're doing; they have names beginning with 244 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 245 c609719bSwdenk 246 c609719bSwdenkLater we will add a configuration tool - probably similar to or even 247 c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 248 c609719bSwdenkdo the configuration by hand, which means creating some symbolic 249 c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 250 c609719bSwdenkas an example here. 251 c609719bSwdenk 252 c609719bSwdenk 253 c609719bSwdenkSelection of Processor Architecture and Board Type: 254 c609719bSwdenk--------------------------------------------------- 255 c609719bSwdenk 256 c609719bSwdenkFor all supported boards there are ready-to-use default 257 c609719bSwdenkconfigurations available; just type "make <board_name>_config". 258 c609719bSwdenk 259 c609719bSwdenkExample: For a TQM823L module type: 260 c609719bSwdenk 261 c609719bSwdenk cd u-boot 262 c609719bSwdenk make TQM823L_config 263 c609719bSwdenk 264 11ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 265 c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 266 c609719bSwdenkdirectory according to the instructions in cogent/README. 267 c609719bSwdenk 268 c609719bSwdenk 269 c609719bSwdenkConfiguration Options: 270 c609719bSwdenk---------------------- 271 c609719bSwdenk 272 c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 273 c609719bSwdenksuch information is kept in a configuration file 274 c609719bSwdenk"include/configs/<board_name>.h". 275 c609719bSwdenk 276 c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 277 c609719bSwdenk"include/configs/TQM823L.h". 278 c609719bSwdenk 279 c609719bSwdenk 280 7f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 281 7f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 282 7f6c2cbcSwdenkbuild a config tool - later. 283 7f6c2cbcSwdenk 284 7f6c2cbcSwdenk 285 c609719bSwdenkThe following options need to be configured: 286 c609719bSwdenk 287 2628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 288 c609719bSwdenk 289 2628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 290 6ccec449SWolfgang Denk 291 6ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 292 09ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 293 c609719bSwdenk 294 c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 295 c609719bSwdenk Define exactly one of 296 c609719bSwdenk CONFIG_CMA286_60_OLD 297 c609719bSwdenk--- FIXME --- not tested yet: 298 c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 299 c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 300 c609719bSwdenk 301 c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 302 c609719bSwdenk Define exactly one of 303 c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 304 c609719bSwdenk 305 c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 306 c609719bSwdenk Define one or more of 307 c609719bSwdenk CONFIG_CMA302 308 c609719bSwdenk 309 c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 310 c609719bSwdenk Define one or more of 311 c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 312 11ccc33fSMarcel Ziswiler the LCD display every second with 313 c609719bSwdenk a "rotator" |\-/|\-/ 314 c609719bSwdenk 315 2535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 316 2535d602Swdenk CONFIG_ADSTYPE 317 2535d602Swdenk Possible values are: 318 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 319 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 320 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 321 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 322 2535d602Swdenk 323 cf946c6dSLei Wen- Marvell Family Member 324 cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 325 cf946c6dSLei Wen multiple fs option at one time 326 cf946c6dSLei Wen for marvell soc family 327 cf946c6dSLei Wen 328 c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 329 c609719bSwdenk Define exactly one of 330 c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 331 c609719bSwdenk 332 11ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 333 66ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 334 66ca92a5Swdenk get_gclk_freq() cannot work 335 5da627a4Swdenk e.g. if there is no 32KHz 336 5da627a4Swdenk reference PIT/RTC clock 337 66ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 338 66ca92a5Swdenk or XTAL/EXTAL) 339 c609719bSwdenk 340 66ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 341 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 342 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 343 66ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 344 75d1ea7fSwdenk See doc/README.MPC866 345 75d1ea7fSwdenk 346 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 347 75d1ea7fSwdenk 348 75d1ea7fSwdenk Define this to measure the actual CPU clock instead 349 75d1ea7fSwdenk of relying on the correctness of the configured 350 75d1ea7fSwdenk values. Mostly useful for board bringup to make sure 351 75d1ea7fSwdenk the PLL is locked at the intended frequency. Note 352 75d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 353 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 354 75d1ea7fSwdenk 355 506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 356 506f3918SHeiko Schocher 357 506f3918SHeiko Schocher Define this option if you want to enable the 358 506f3918SHeiko Schocher ICache only when Code runs from RAM. 359 506f3918SHeiko Schocher 360 66412c63SKumar Gala- 85xx CPU Options: 361 66412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 362 66412c63SKumar Gala 363 66412c63SKumar Gala Defines the core time base clock divider ratio compared to the 364 66412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 365 66412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 366 66412c63SKumar Gala 367 8f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 368 8f29084aSKumar Gala 369 8f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 370 8f29084aSKumar Gala tree nodes for the given platform. 371 8f29084aSKumar Gala 372 0b953ffcSMarkus Klotzbuecher- Intel Monahans options: 373 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 374 0b953ffcSMarkus Klotzbuecher 375 0b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 376 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 377 0b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 378 0b953ffcSMarkus Klotzbuecher 379 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 380 0b953ffcSMarkus Klotzbuecher 381 0b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 382 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 383 0b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 384 0b953ffcSMarkus Klotzbuecher by this value. 385 0b953ffcSMarkus Klotzbuecher 386 92bbd64eSDaniel Schwierzeck- MIPS CPU options: 387 92bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 388 92bbd64eSDaniel Schwierzeck 389 92bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 390 92bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 391 92bbd64eSDaniel Schwierzeck relocation. 392 92bbd64eSDaniel Schwierzeck 393 92bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 394 92bbd64eSDaniel Schwierzeck 395 92bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 396 92bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 397 92bbd64eSDaniel Schwierzeck Possible values are: 398 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 399 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 400 92bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 401 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 402 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 403 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 404 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 405 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 406 92bbd64eSDaniel Schwierzeck 407 92bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 408 92bbd64eSDaniel Schwierzeck 409 92bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 410 92bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 411 92bbd64eSDaniel Schwierzeck 412 92bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 413 92bbd64eSDaniel Schwierzeck 414 92bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 415 92bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 416 92bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 417 92bbd64eSDaniel Schwierzeck 418 5da627a4Swdenk- Linux Kernel Interface: 419 c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 420 c609719bSwdenk 421 c609719bSwdenk U-Boot stores all clock information in Hz 422 c609719bSwdenk internally. For binary compatibility with older Linux 423 c609719bSwdenk kernels (which expect the clocks passed in the 424 c609719bSwdenk bd_info data to be in MHz) the environment variable 425 c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 426 c609719bSwdenk converts clock data to MHZ before passing it to the 427 c609719bSwdenk Linux kernel. 428 c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 429 c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 430 c609719bSwdenk default environment. 431 c609719bSwdenk 432 5da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 433 5da627a4Swdenk 434 11ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 435 5da627a4Swdenk expect it to be in bytes, others in MB. 436 5da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 437 5da627a4Swdenk 438 fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 439 f57f70aaSWolfgang Denk 440 f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 441 213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 442 213bf8c8SGerald Van Baren concepts). 443 213bf8c8SGerald Van Baren 444 213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 445 213bf8c8SGerald Van Baren * New libfdt-based support 446 213bf8c8SGerald Van Baren * Adds the "fdt" command 447 3bb342fcSKim Phillips * The bootm command automatically updates the fdt 448 213bf8c8SGerald Van Baren 449 b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 450 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 451 b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 452 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 453 f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 454 c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 455 f57f70aaSWolfgang Denk 456 11ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 457 11ccc33fSMarcel Ziswiler addresses 458 3bb342fcSKim Phillips 459 4e253137SKumar Gala CONFIG_OF_BOARD_SETUP 460 4e253137SKumar Gala 461 4e253137SKumar Gala Board code has addition modification that it wants to make 462 4e253137SKumar Gala to the flat device tree before handing it off to the kernel 463 6705d81eSwdenk 464 0267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 465 0267768eSMatthew McClintock 466 11ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 467 0267768eSMatthew McClintock param header, the default value is zero if undefined. 468 0267768eSMatthew McClintock 469 3887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 470 3887c3fbSHeiko Schocher 471 3887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 472 3887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 473 3887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 474 3887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 475 3887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 476 3887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 477 3887c3fbSHeiko Schocher 478 7eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 479 7eb29398SIgor Grinberg 480 7eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 481 7eb29398SIgor Grinberg machine type and must be used to specify the machine type 482 7eb29398SIgor Grinberg number as it appears in the ARM machine registry 483 7eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 484 7eb29398SIgor Grinberg Only boards that have multiple machine types supported 485 7eb29398SIgor Grinberg in a single configuration file and the machine type is 486 7eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 487 7eb29398SIgor Grinberg 488 0b2f4ecaSNiklaus Giger- vxWorks boot parameters: 489 0b2f4ecaSNiklaus Giger 490 0b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 491 0b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 492 0b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 493 0b2f4ecaSNiklaus Giger 494 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 495 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 496 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 497 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 498 0b2f4ecaSNiklaus Giger 499 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 500 0b2f4ecaSNiklaus Giger 501 0b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 502 0b2f4ecaSNiklaus Giger 503 0b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 504 0b2f4ecaSNiklaus Giger the defaults discussed just above. 505 0b2f4ecaSNiklaus Giger 506 2c451f78SAneesh V- Cache Configuration: 507 2c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 508 2c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 509 2c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 510 2c451f78SAneesh V 511 93bc2193SAneesh V- Cache Configuration for ARM: 512 93bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 513 93bc2193SAneesh V controller 514 93bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 515 93bc2193SAneesh V controller register space 516 93bc2193SAneesh V 517 6705d81eSwdenk- Serial Ports: 518 48d0192fSAndreas Engel CONFIG_PL010_SERIAL 519 6705d81eSwdenk 520 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 521 6705d81eSwdenk 522 48d0192fSAndreas Engel CONFIG_PL011_SERIAL 523 6705d81eSwdenk 524 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 525 6705d81eSwdenk 526 6705d81eSwdenk CONFIG_PL011_CLOCK 527 6705d81eSwdenk 528 6705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 529 6705d81eSwdenk the clock speed of the UARTs. 530 6705d81eSwdenk 531 6705d81eSwdenk CONFIG_PL01x_PORTS 532 6705d81eSwdenk 533 6705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 534 6705d81eSwdenk define this to a list of base addresses for each (supported) 535 6705d81eSwdenk port. See e.g. include/configs/versatile.h 536 6705d81eSwdenk 537 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 538 910f1ae3SJohn Rigby 539 910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 540 910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 541 910f1ae3SJohn Rigby this variable to initialize the extra register. 542 910f1ae3SJohn Rigby 543 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 544 910f1ae3SJohn Rigby 545 910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 546 910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 547 910f1ae3SJohn Rigby variable to flush the UART at init time. 548 910f1ae3SJohn Rigby 549 6705d81eSwdenk 550 c609719bSwdenk- Console Interface: 551 c609719bSwdenk Depending on board, define exactly one serial port 552 c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 553 c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 554 c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 555 c609719bSwdenk 556 c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 557 c609719bSwdenk port routines must be defined elsewhere 558 c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 559 c609719bSwdenk 560 c609719bSwdenk CONFIG_CFB_CONSOLE 561 c609719bSwdenk Enables console device for a color framebuffer. Needs following 562 c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 563 c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 564 c609719bSwdenk (default big endian) 565 c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 566 c609719bSwdenk rectangle fill 567 c609719bSwdenk (cf. smiLynxEM) 568 c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 569 c609719bSwdenk bit-blit (cf. smiLynxEM) 570 c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 571 c609719bSwdenk (cols=pitch) 572 c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 573 c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 574 c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 575 c609719bSwdenk (0-5, cf. cfb_console.c) 576 c609719bSwdenk VIDEO_FB_ADRS framebuffer address 577 c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 578 c609719bSwdenk (i.e. i8042_kbd_init()) 579 c609719bSwdenk VIDEO_TSTC_FCT test char fct 580 c609719bSwdenk (i.e. i8042_tstc) 581 c609719bSwdenk VIDEO_GETC_FCT get char fct 582 c609719bSwdenk (i.e. i8042_getc) 583 c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 584 c609719bSwdenk (requires blink timer 585 c609719bSwdenk cf. i8042.c) 586 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 587 c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 588 c609719bSwdenk upper right corner 589 602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 590 c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 591 c609719bSwdenk upper left corner 592 a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 593 a6c7ad2fSwdenk linux_logo.h for logo. 594 a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 595 c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 596 11ccc33fSMarcel Ziswiler additional board info beside 597 c609719bSwdenk the logo 598 c609719bSwdenk 599 c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 600 c609719bSwdenk default i/o. Serial console can be forced with 601 c609719bSwdenk environment 'console=serial'. 602 c609719bSwdenk 603 a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 604 a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 605 a3ad8e26Swdenk the "silent" environment variable. See 606 a3ad8e26Swdenk doc/README.silent for more information. 607 a3ad8e26Swdenk 608 c609719bSwdenk- Console Baudrate: 609 c609719bSwdenk CONFIG_BAUDRATE - in bps 610 c609719bSwdenk Select one of the baudrates listed in 611 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 612 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 613 c609719bSwdenk 614 c92fac91SHeiko Schocher- Console Rx buffer length 615 c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 616 c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 617 2b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 618 c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 619 c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 620 c92fac91SHeiko Schocher the SMC. 621 c92fac91SHeiko Schocher 622 9558b48aSGraeme Russ- Pre-Console Buffer: 623 9558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 624 9558b48aSGraeme Russ initialised etc) all console output is silently discarded. 625 9558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 626 9558b48aSGraeme Russ buffer any console messages prior to the console being 627 9558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 628 9558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 629 9558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 630 9558b48aSGraeme Russ bytes are output before the console is initialised, the 631 9558b48aSGraeme Russ earlier bytes are discarded. 632 9558b48aSGraeme Russ 633 9558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 634 9558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 635 9558b48aSGraeme Russ 636 c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 637 c609719bSwdenk Delay before automatically booting the default image; 638 c609719bSwdenk set to -1 to disable autoboot. 639 c609719bSwdenk 640 c609719bSwdenk See doc/README.autoboot for these options that 641 c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 642 c609719bSwdenk CONFIG_BOOT_RETRY_TIME 643 c609719bSwdenk CONFIG_BOOT_RETRY_MIN 644 c609719bSwdenk CONFIG_AUTOBOOT_KEYED 645 c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 646 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 647 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 648 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 649 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 650 c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 651 c609719bSwdenk CONFIG_RESET_TO_RETRY 652 c609719bSwdenk 653 c609719bSwdenk- Autoboot Command: 654 c609719bSwdenk CONFIG_BOOTCOMMAND 655 c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 656 c609719bSwdenk define a command string that is automatically executed 657 c609719bSwdenk when no character is read on the console interface 658 c609719bSwdenk within "Boot Delay" after reset. 659 c609719bSwdenk 660 c609719bSwdenk CONFIG_BOOTARGS 661 c609719bSwdenk This can be used to pass arguments to the bootm 662 c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 663 c609719bSwdenk environment value "bootargs". 664 c609719bSwdenk 665 c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 666 c609719bSwdenk The value of these goes into the environment as 667 c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 668 c609719bSwdenk as a convenience, when switching between booting from 669 11ccc33fSMarcel Ziswiler RAM and NFS. 670 c609719bSwdenk 671 c609719bSwdenk- Pre-Boot Commands: 672 c609719bSwdenk CONFIG_PREBOOT 673 c609719bSwdenk 674 c609719bSwdenk When this option is #defined, the existence of the 675 c609719bSwdenk environment variable "preboot" will be checked 676 c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 677 c609719bSwdenk countdown and/or running the auto-boot command resp. 678 c609719bSwdenk entering interactive mode. 679 c609719bSwdenk 680 c609719bSwdenk This feature is especially useful when "preboot" is 681 c609719bSwdenk automatically generated or modified. For an example 682 c609719bSwdenk see the LWMON board specific code: here "preboot" is 683 c609719bSwdenk modified when the user holds down a certain 684 c609719bSwdenk combination of keys on the (special) keyboard when 685 c609719bSwdenk booting the systems 686 c609719bSwdenk 687 c609719bSwdenk- Serial Download Echo Mode: 688 c609719bSwdenk CONFIG_LOADS_ECHO 689 c609719bSwdenk If defined to 1, all characters received during a 690 c609719bSwdenk serial download (using the "loads" command) are 691 c609719bSwdenk echoed back. This might be needed by some terminal 692 c609719bSwdenk emulations (like "cu"), but may as well just take 693 c609719bSwdenk time on others. This setting #define's the initial 694 c609719bSwdenk value of the "loads_echo" environment variable. 695 c609719bSwdenk 696 602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 697 c609719bSwdenk CONFIG_KGDB_BAUDRATE 698 c609719bSwdenk Select one of the baudrates listed in 699 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 700 c609719bSwdenk 701 c609719bSwdenk- Monitor Functions: 702 602ad3b3SJon Loeliger Monitor commands can be included or excluded 703 602ad3b3SJon Loeliger from the build by using the #include files 704 602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 705 602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 706 602ad3b3SJon Loeliger and augmenting with additional #define's 707 602ad3b3SJon Loeliger for wanted commands. 708 c609719bSwdenk 709 602ad3b3SJon Loeliger The default command configuration includes all commands 710 602ad3b3SJon Loeliger except those marked below with a "*". 711 602ad3b3SJon Loeliger 712 602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 713 602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 714 602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 715 602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 716 602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 717 602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 718 602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 719 602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 720 710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 721 602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 722 602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 723 602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 724 a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 725 a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 726 a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 727 a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 728 602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 729 602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 730 246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 731 602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 732 602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 733 0c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 734 bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 735 602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 736 602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 737 602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 738 602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 739 602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 740 a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 741 a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 742 602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 743 602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 744 602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 745 602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 746 602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 747 602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 748 0c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 749 602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 750 602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 751 602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 752 602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 753 1ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 754 602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 755 602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 756 02c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 757 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 758 602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 759 56523f12Swdenk loop, loopw, mtest 760 602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 761 602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 762 602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 763 68d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 764 602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 765 602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 766 e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 767 e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 768 602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 769 602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 770 602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 771 602ad3b3SJon Loeliger host 772 602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 773 602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 774 602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 775 602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 776 602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 777 602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 778 602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 779 602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 780 602ad3b3SJon Loeliger (4xx only) 781 c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 782 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 783 74de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 784 602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 785 7a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 786 602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 787 602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 788 602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 789 c609719bSwdenk 790 c609719bSwdenk 791 c609719bSwdenk EXAMPLE: If you want all functions except of network 792 c609719bSwdenk support you can write: 793 c609719bSwdenk 794 602ad3b3SJon Loeliger #include "config_cmd_all.h" 795 602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 796 c609719bSwdenk 797 213bf8c8SGerald Van Baren Other Commands: 798 213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 799 c609719bSwdenk 800 c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 801 602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 802 c609719bSwdenk what you (and your U-Boot users) are doing. Data 803 c609719bSwdenk cache cannot be enabled on systems like the 8xx or 804 c609719bSwdenk 8260 (where accesses to the IMMR region must be 805 c609719bSwdenk uncached), and it cannot be disabled on all other 806 c609719bSwdenk systems where we (mis-) use the data cache to hold an 807 c609719bSwdenk initial stack and some data. 808 c609719bSwdenk 809 c609719bSwdenk 810 c609719bSwdenk XXX - this list needs to get updated! 811 c609719bSwdenk 812 c609719bSwdenk- Watchdog: 813 c609719bSwdenk CONFIG_WATCHDOG 814 c609719bSwdenk If this variable is defined, it enables watchdog 815 6abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 816 6abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 817 6abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 818 6abe6fb6SDetlev Zundel register. When supported for a specific SoC is 819 6abe6fb6SDetlev Zundel available, then no further board specific code should 820 6abe6fb6SDetlev Zundel be needed to use it. 821 6abe6fb6SDetlev Zundel 822 6abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 823 6abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 824 6abe6fb6SDetlev Zundel SoC, then define this variable and provide board 825 6abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 826 c609719bSwdenk 827 c1551ea8Sstroese- U-Boot Version: 828 c1551ea8Sstroese CONFIG_VERSION_VARIABLE 829 c1551ea8Sstroese If this variable is defined, an environment variable 830 c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 831 c1551ea8Sstroese version as printed by the "version" command. 832 c1551ea8Sstroese This variable is readonly. 833 c1551ea8Sstroese 834 c609719bSwdenk- Real-Time Clock: 835 c609719bSwdenk 836 602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 837 c609719bSwdenk has to be selected, too. Define exactly one of the 838 c609719bSwdenk following options: 839 c609719bSwdenk 840 c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 841 c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 842 7ce63709SGuennadi Liakhovetski CONFIG_RTC_MC13783 - use MC13783 RTC 843 c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 844 1cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 845 c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 846 7f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 847 3bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 848 9536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 849 4c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 850 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 851 71d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 852 71d19f30SHeiko Schocher RV3029 RTC. 853 c609719bSwdenk 854 b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 855 b37c7e5eSwdenk must also be configured. See I2C Support, below. 856 b37c7e5eSwdenk 857 e92739d3SPeter Tyser- GPIO Support: 858 e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 859 e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 860 e92739d3SPeter Tyser 861 5dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 862 5dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 863 5dec49caSChris Packham pins supported by a particular chip. 864 5dec49caSChris Packham 865 e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 866 e92739d3SPeter Tyser must also be configured. See I2C Support, below. 867 e92739d3SPeter Tyser 868 c609719bSwdenk- Timestamp Support: 869 c609719bSwdenk 870 c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 871 c609719bSwdenk (date and time) of an image is printed by image 872 c609719bSwdenk commands like bootm or iminfo. This option is 873 602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 874 c609719bSwdenk 875 c609719bSwdenk- Partition Support: 876 c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 877 07f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 878 c609719bSwdenk 879 602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 880 218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 881 218ca724SWolfgang Denk least one partition type as well. 882 c609719bSwdenk 883 c609719bSwdenk- IDE Reset method: 884 4d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 885 4d13cbadSwdenk board configurations files but used nowhere! 886 c609719bSwdenk 887 4d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 888 4d13cbadSwdenk be performed by calling the function 889 4d13cbadSwdenk ide_set_reset(int reset) 890 4d13cbadSwdenk which has to be defined in a board specific file 891 c609719bSwdenk 892 c609719bSwdenk- ATAPI Support: 893 c609719bSwdenk CONFIG_ATAPI 894 c609719bSwdenk 895 c609719bSwdenk Set this to enable ATAPI support. 896 c609719bSwdenk 897 c40b2956Swdenk- LBA48 Support 898 c40b2956Swdenk CONFIG_LBA48 899 c40b2956Swdenk 900 c40b2956Swdenk Set this to enable support for disks larger than 137GB 901 4b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 902 c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 903 c40b2956Swdenk support disks up to 2.1TB. 904 c40b2956Swdenk 905 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 906 c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 907 c40b2956Swdenk Default is 32bit. 908 c40b2956Swdenk 909 c609719bSwdenk- SCSI Support: 910 c609719bSwdenk At the moment only there is only support for the 911 c609719bSwdenk SYM53C8XX SCSI controller; define 912 c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 913 c609719bSwdenk 914 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 915 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 916 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 917 c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 918 c609719bSwdenk devices. 919 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 920 c609719bSwdenk 921 c609719bSwdenk- NETWORK Support (PCI): 922 682011ffSwdenk CONFIG_E1000 923 682011ffSwdenk Support for Intel 8254x gigabit chips. 924 682011ffSwdenk 925 ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 926 11ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 927 ac3315c2SAndre Schwarz 928 c609719bSwdenk CONFIG_EEPRO100 929 c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 930 11ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 931 c609719bSwdenk write routine for first time initialisation. 932 c609719bSwdenk 933 c609719bSwdenk CONFIG_TULIP 934 c609719bSwdenk Support for Digital 2114x chips. 935 c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 936 c609719bSwdenk modem chip initialisation (KS8761/QS6611). 937 c609719bSwdenk 938 c609719bSwdenk CONFIG_NATSEMI 939 c609719bSwdenk Support for National dp83815 chips. 940 c609719bSwdenk 941 c609719bSwdenk CONFIG_NS8382X 942 c609719bSwdenk Support for National dp8382[01] gigabit chips. 943 c609719bSwdenk 944 45219c46Swdenk- NETWORK Support (other): 945 45219c46Swdenk 946 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 947 c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 948 c041e9d2SJens Scharsig 949 c041e9d2SJens Scharsig CONFIG_RMII 950 c041e9d2SJens Scharsig Define this to use reduced MII inteface 951 c041e9d2SJens Scharsig 952 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 953 c041e9d2SJens Scharsig If this defined, the driver is quiet. 954 c041e9d2SJens Scharsig The driver doen't show link status messages. 955 c041e9d2SJens Scharsig 956 45219c46Swdenk CONFIG_DRIVER_LAN91C96 957 45219c46Swdenk Support for SMSC's LAN91C96 chips. 958 45219c46Swdenk 959 45219c46Swdenk CONFIG_LAN91C96_BASE 960 45219c46Swdenk Define this to hold the physical address 961 45219c46Swdenk of the LAN91C96's I/O space 962 45219c46Swdenk 963 45219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 964 45219c46Swdenk Define this to enable 32 bit addressing 965 45219c46Swdenk 966 f39748aeSwdenk CONFIG_DRIVER_SMC91111 967 f39748aeSwdenk Support for SMSC's LAN91C111 chip 968 f39748aeSwdenk 969 f39748aeSwdenk CONFIG_SMC91111_BASE 970 f39748aeSwdenk Define this to hold the physical address 971 f39748aeSwdenk of the device (I/O space) 972 f39748aeSwdenk 973 f39748aeSwdenk CONFIG_SMC_USE_32_BIT 974 f39748aeSwdenk Define this if data bus is 32 bits 975 f39748aeSwdenk 976 f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 977 f39748aeSwdenk Define this to use i/o functions instead of macros 978 f39748aeSwdenk (some hardware wont work with macros) 979 f39748aeSwdenk 980 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 981 b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 982 b3dbf4a5SMacpaul Lin 983 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 984 b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 985 b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 986 b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 987 b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 988 b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 989 b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 990 b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 991 b3dbf4a5SMacpaul Lin 992 c2fff331SMike Rapoport CONFIG_SMC911X 993 557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 994 557b377dSJens Gehrlein 995 c2fff331SMike Rapoport CONFIG_SMC911X_BASE 996 557b377dSJens Gehrlein Define this to hold the physical address 997 557b377dSJens Gehrlein of the device (I/O space) 998 557b377dSJens Gehrlein 999 c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1000 557b377dSJens Gehrlein Define this if data bus is 32 bits 1001 557b377dSJens Gehrlein 1002 c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1003 557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1004 557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1005 c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1006 557b377dSJens Gehrlein 1007 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 1008 3d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 1009 3d0075faSYoshihiro Shimoda 1010 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 1011 3d0075faSYoshihiro Shimoda Define the number of ports to be used 1012 3d0075faSYoshihiro Shimoda 1013 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 1014 3d0075faSYoshihiro Shimoda Define the ETH PHY's address 1015 3d0075faSYoshihiro Shimoda 1016 68260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 1017 68260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 1018 68260aabSYoshihiro Shimoda 1019 c609719bSwdenk- USB Support: 1020 c609719bSwdenk At the moment only the UHCI host controller is 1021 4d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1022 c609719bSwdenk CONFIG_USB_UHCI to enable it. 1023 c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 1024 30d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1025 c609719bSwdenk storage devices. 1026 c609719bSwdenk Note: 1027 c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1028 c609719bSwdenk (TEAC FD-05PUB). 1029 4d13cbadSwdenk MPC5200 USB requires additional defines: 1030 4d13cbadSwdenk CONFIG_USB_CLOCK 1031 4d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1032 307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1033 307ecb6dSEric Millbrandt for USB on PSC3 1034 4d13cbadSwdenk CONFIG_USB_CONFIG 1035 4d13cbadSwdenk for differential drivers: 0x00001000 1036 4d13cbadSwdenk for single ended drivers: 0x00005000 1037 307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1038 307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 1039 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1040 fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1041 fdcfaa1bSZhang Wei instead of using asynchronous interrupts 1042 4d13cbadSwdenk 1043 16c8d5e7SWolfgang Denk- USB Device: 1044 16c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 1045 16c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 1046 16c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 1047 11ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 1048 16c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 1049 16c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 1050 16c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 1051 16c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 1052 16c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 1053 16c8d5e7SWolfgang Denk a Linux host by 1054 16c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 1055 16c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 1056 16c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 1057 16c8d5e7SWolfgang Denk might be defined in YourBoardName.h 1058 16c8d5e7SWolfgang Denk 1059 16c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 1060 16c8d5e7SWolfgang Denk Define this to build a UDC device 1061 16c8d5e7SWolfgang Denk 1062 16c8d5e7SWolfgang Denk CONFIG_USB_TTY 1063 16c8d5e7SWolfgang Denk Define this to have a tty type of device available to 1064 16c8d5e7SWolfgang Denk talk to the UDC device 1065 16c8d5e7SWolfgang Denk 1066 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 1067 16c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 1068 16c8d5e7SWolfgang Denk be set to usbtty. 1069 16c8d5e7SWolfgang Denk 1070 16c8d5e7SWolfgang Denk mpc8xx: 1071 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 1072 16c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 1073 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 1074 16c8d5e7SWolfgang Denk 1075 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 1076 16c8d5e7SWolfgang Denk Derive USB clock from brgclk 1077 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 1078 16c8d5e7SWolfgang Denk 1079 16c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 1080 16c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 1081 16c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 1082 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 1083 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 1084 16c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 1085 16c8d5e7SWolfgang Denk 1086 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 1087 16c8d5e7SWolfgang Denk Define this string as the name of your company for 1088 16c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 1089 16c8d5e7SWolfgang Denk 1090 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 1091 16c8d5e7SWolfgang Denk Define this string as the name of your product 1092 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 1093 16c8d5e7SWolfgang Denk 1094 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 1095 16c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 1096 16c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 1097 16c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 1098 16c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 1099 16c8d5e7SWolfgang Denk 1100 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 1101 16c8d5e7SWolfgang Denk Define this as the unique Product ID 1102 16c8d5e7SWolfgang Denk for your device 1103 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1104 c609719bSwdenk 1105 c609719bSwdenk 1106 c609719bSwdenk- MMC Support: 1107 c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1108 c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1109 c609719bSwdenk accessed from the boot prompt by mapping the device 1110 c609719bSwdenk to physical memory similar to flash. Command line is 1111 602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1112 602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1113 c609719bSwdenk 1114 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1115 afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1116 afb35666SYoshihiro Shimoda 1117 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1118 afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1119 afb35666SYoshihiro Shimoda 1120 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1121 afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1122 afb35666SYoshihiro Shimoda 1123 6705d81eSwdenk- Journaling Flash filesystem support: 1124 6705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 1125 6705d81eSwdenk CONFIG_JFFS2_NAND_DEV 1126 6705d81eSwdenk Define these for a default partition on a NAND device 1127 6705d81eSwdenk 1128 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 1129 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 1130 6705d81eSwdenk Define these for a default partition on a NOR device 1131 6705d81eSwdenk 1132 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 1133 6705d81eSwdenk Define this to create an own partition. You have to provide a 1134 6705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 1135 6705d81eSwdenk 1136 6705d81eSwdenk If you define only one JFFS2 partition you may also want to 1137 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 1138 6705d81eSwdenk to disable the command chpart. This is the default when you 1139 6705d81eSwdenk have not defined a custom partition 1140 6705d81eSwdenk 1141 c609719bSwdenk- Keyboard Support: 1142 c609719bSwdenk CONFIG_ISA_KEYBOARD 1143 c609719bSwdenk 1144 c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1145 c609719bSwdenk support 1146 c609719bSwdenk 1147 c609719bSwdenk CONFIG_I8042_KBD 1148 c609719bSwdenk Standard PC keyboard driver with US (is default) and 1149 c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1150 c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1151 c609719bSwdenk for cfb_console. Supports cursor blinking. 1152 c609719bSwdenk 1153 c609719bSwdenk- Video support: 1154 c609719bSwdenk CONFIG_VIDEO 1155 c609719bSwdenk 1156 c609719bSwdenk Define this to enable video support (for output to 1157 c609719bSwdenk video). 1158 c609719bSwdenk 1159 c609719bSwdenk CONFIG_VIDEO_CT69000 1160 c609719bSwdenk 1161 c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1162 c609719bSwdenk 1163 c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1164 eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1165 eeb1b77bSwdenk video output is selected via environment 'videoout' 1166 eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1167 eeb1b77bSwdenk assumed. 1168 c609719bSwdenk 1169 eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 1170 11ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1171 eeb1b77bSwdenk are possible: 1172 eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1173 eeb1b77bSwdenk Following standard modes are supported (* is default): 1174 eeb1b77bSwdenk 1175 eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1176 eeb1b77bSwdenk -------------+--------------------------------------------- 1177 eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1178 eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1179 eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1180 eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1181 eeb1b77bSwdenk -------------+--------------------------------------------- 1182 c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1183 c609719bSwdenk 1184 eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 1185 7817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1186 eeb1b77bSwdenk 1187 eeb1b77bSwdenk 1188 a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1189 a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1190 a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1191 a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1192 a6c7ad2fSwdenk 1193 7d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 1194 7d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 1195 7d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 1196 7d3053fbSTimur Tabi support, and should also define these other macros: 1197 7d3053fbSTimur Tabi 1198 7d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 1199 7d3053fbSTimur Tabi CONFIG_VIDEO 1200 7d3053fbSTimur Tabi CONFIG_CMD_BMP 1201 7d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 1202 7d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 1203 7d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 1204 7d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 1205 7d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 1206 7d3053fbSTimur Tabi 1207 ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1208 ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1209 ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1210 ba8e76bdSTimur Tabi description of this variable. 1211 7d3053fbSTimur Tabi 1212 682011ffSwdenk- Keyboard Support: 1213 682011ffSwdenk CONFIG_KEYBOARD 1214 682011ffSwdenk 1215 682011ffSwdenk Define this to enable a custom keyboard support. 1216 682011ffSwdenk This simply calls drv_keyboard_init() which must be 1217 682011ffSwdenk defined in your board-specific files. 1218 682011ffSwdenk The only board using this so far is RBC823. 1219 a6c7ad2fSwdenk 1220 c609719bSwdenk- LCD Support: CONFIG_LCD 1221 c609719bSwdenk 1222 c609719bSwdenk Define this to enable LCD support (for output to LCD 1223 c609719bSwdenk display); also select one of the supported displays 1224 c609719bSwdenk by defining one of these: 1225 c609719bSwdenk 1226 39cf4804SStelian Pop CONFIG_ATMEL_LCD: 1227 39cf4804SStelian Pop 1228 39cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 1229 39cf4804SStelian Pop 1230 fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1231 c609719bSwdenk 1232 fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1233 c609719bSwdenk 1234 fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1235 c609719bSwdenk 1236 fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1237 fd3103bbSwdenk Active, color, single scan. 1238 fd3103bbSwdenk 1239 fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1240 fd3103bbSwdenk 1241 fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1242 c609719bSwdenk Active, color, single scan. 1243 c609719bSwdenk 1244 c609719bSwdenk CONFIG_SHARP_16x9 1245 c609719bSwdenk 1246 c609719bSwdenk Sharp 320x240. Active, color, single scan. 1247 c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1248 c609719bSwdenk 1249 c609719bSwdenk CONFIG_SHARP_LQ64D341 1250 c609719bSwdenk 1251 c609719bSwdenk Sharp LQ64D341 display, 640x480. 1252 c609719bSwdenk Active, color, single scan. 1253 c609719bSwdenk 1254 c609719bSwdenk CONFIG_HLD1045 1255 c609719bSwdenk 1256 c609719bSwdenk HLD1045 display, 640x480. 1257 c609719bSwdenk Active, color, single scan. 1258 c609719bSwdenk 1259 c609719bSwdenk CONFIG_OPTREX_BW 1260 c609719bSwdenk 1261 c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1262 c609719bSwdenk or 1263 c609719bSwdenk Hitachi LMG6912RPFC-00T 1264 c609719bSwdenk or 1265 c609719bSwdenk Hitachi SP14Q002 1266 c609719bSwdenk 1267 c609719bSwdenk 320x240. Black & white. 1268 c609719bSwdenk 1269 c609719bSwdenk Normally display is black on white background; define 1270 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1271 c609719bSwdenk 1272 7152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1273 d791b1dcSwdenk 1274 d791b1dcSwdenk If this option is set, the environment is checked for 1275 d791b1dcSwdenk a variable "splashimage". If found, the usual display 1276 d791b1dcSwdenk of logo, copyright and system information on the LCD 1277 e94d2cd9Swdenk is suppressed and the BMP image at the address 1278 d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1279 d791b1dcSwdenk console is redirected to the "nulldev", too. This 1280 d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1281 d791b1dcSwdenk loaded very quickly after power-on. 1282 d791b1dcSwdenk 1283 1ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 1284 1ca298ceSMatthias Weisser 1285 1ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 1286 1ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 1287 1ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 1288 1ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 1289 1ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 1290 1ca298ceSMatthias Weisser specify 'm' for centering the image. 1291 1ca298ceSMatthias Weisser 1292 1ca298ceSMatthias Weisser Example: 1293 1ca298ceSMatthias Weisser setenv splashpos m,m 1294 1ca298ceSMatthias Weisser => image at center of screen 1295 1ca298ceSMatthias Weisser 1296 1ca298ceSMatthias Weisser setenv splashpos 30,20 1297 1ca298ceSMatthias Weisser => image at x = 30 and y = 20 1298 1ca298ceSMatthias Weisser 1299 1ca298ceSMatthias Weisser setenv splashpos -10,m 1300 1ca298ceSMatthias Weisser => vertically centered image 1301 1ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 1302 1ca298ceSMatthias Weisser 1303 98f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 1304 98f4a3dfSStefan Roese 1305 98f4a3dfSStefan Roese If this option is set, additionally to standard BMP 1306 98f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 1307 98f4a3dfSStefan Roese splashscreen support or the bmp command. 1308 98f4a3dfSStefan Roese 1309 d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1310 d5011762SAnatolij Gustschin 1311 d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1312 d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1313 d5011762SAnatolij Gustschin bmp command. 1314 d5011762SAnatolij Gustschin 1315 c29fdfc1Swdenk- Compression support: 1316 c29fdfc1Swdenk CONFIG_BZIP2 1317 c29fdfc1Swdenk 1318 c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1319 c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1320 c29fdfc1Swdenk compressed images are supported. 1321 c29fdfc1Swdenk 1322 c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1323 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1324 c29fdfc1Swdenk be at least 4MB. 1325 d791b1dcSwdenk 1326 fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1327 fc9c1727SLuigi 'Comio' Mantellini 1328 fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1329 fc9c1727SLuigi 'Comio' Mantellini images is included. 1330 fc9c1727SLuigi 'Comio' Mantellini 1331 fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1332 fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1333 fc9c1727SLuigi 'Comio' Mantellini formula: 1334 fc9c1727SLuigi 'Comio' Mantellini 1335 fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1336 fc9c1727SLuigi 'Comio' Mantellini 1337 fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1338 fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1339 fc9c1727SLuigi 'Comio' Mantellini 1340 fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1341 fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1342 fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1343 fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1344 fc9c1727SLuigi 'Comio' Mantellini 1345 fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1346 fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 1347 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1348 fc9c1727SLuigi 'Comio' Mantellini 1349 17ea1177Swdenk- MII/PHY support: 1350 17ea1177Swdenk CONFIG_PHY_ADDR 1351 17ea1177Swdenk 1352 17ea1177Swdenk The address of PHY on MII bus. 1353 17ea1177Swdenk 1354 17ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 1355 17ea1177Swdenk 1356 17ea1177Swdenk The clock frequency of the MII bus 1357 17ea1177Swdenk 1358 17ea1177Swdenk CONFIG_PHY_GIGE 1359 17ea1177Swdenk 1360 17ea1177Swdenk If this option is set, support for speed/duplex 1361 11ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 1362 17ea1177Swdenk 1363 17ea1177Swdenk CONFIG_PHY_RESET_DELAY 1364 17ea1177Swdenk 1365 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1366 17ea1177Swdenk reset before any MII register access is possible. 1367 17ea1177Swdenk For such PHY, set this option to the usec delay 1368 17ea1177Swdenk required. (minimum 300usec for LXT971A) 1369 17ea1177Swdenk 1370 17ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 1371 17ea1177Swdenk 1372 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1373 17ea1177Swdenk command issued before MII status register can be read 1374 17ea1177Swdenk 1375 c609719bSwdenk- Ethernet address: 1376 c609719bSwdenk CONFIG_ETHADDR 1377 c68a05feSrichardretanubun CONFIG_ETH1ADDR 1378 c609719bSwdenk CONFIG_ETH2ADDR 1379 c609719bSwdenk CONFIG_ETH3ADDR 1380 c68a05feSrichardretanubun CONFIG_ETH4ADDR 1381 c68a05feSrichardretanubun CONFIG_ETH5ADDR 1382 c609719bSwdenk 1383 11ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 1384 11ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1385 c609719bSwdenk is not determined automatically. 1386 c609719bSwdenk 1387 c609719bSwdenk- IP address: 1388 c609719bSwdenk CONFIG_IPADDR 1389 c609719bSwdenk 1390 c609719bSwdenk Define a default value for the IP address to use for 1391 11ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1392 c609719bSwdenk determined through e.g. bootp. 1393 c609719bSwdenk 1394 c609719bSwdenk- Server IP address: 1395 c609719bSwdenk CONFIG_SERVERIP 1396 c609719bSwdenk 1397 c609719bSwdenk Defines a default value for the IP address of a TFTP 1398 c609719bSwdenk server to contact when using the "tftboot" command. 1399 c609719bSwdenk 1400 97cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 1401 97cfe861SRobin Getz 1402 97cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 1403 97cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 1404 97cfe861SRobin Getz 1405 53a5c424SDavid Updegraff- Multicast TFTP Mode: 1406 53a5c424SDavid Updegraff CONFIG_MCAST_TFTP 1407 53a5c424SDavid Updegraff 1408 53a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 1409 53a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 1410 11ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 1411 53a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 1412 53a5c424SDavid Updegraff multicast group. 1413 53a5c424SDavid Updegraff 1414 c609719bSwdenk- BOOTP Recovery Mode: 1415 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1416 c609719bSwdenk 1417 c609719bSwdenk If you have many targets in a network that try to 1418 c609719bSwdenk boot using BOOTP, you may want to avoid that all 1419 c609719bSwdenk systems send out BOOTP requests at precisely the same 1420 c609719bSwdenk moment (which would happen for instance at recovery 1421 c609719bSwdenk from a power failure, when all systems will try to 1422 c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1423 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1424 c609719bSwdenk inserted before sending out BOOTP requests. The 1425 6c33c785SWolfgang Denk following delays are inserted then: 1426 c609719bSwdenk 1427 c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1428 c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1429 c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1430 c609719bSwdenk 4th and following 1431 c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1432 c609719bSwdenk 1433 fe389a82Sstroese- DHCP Advanced Options: 1434 1fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 1435 1fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1436 fe389a82Sstroese 1437 1fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 1438 1fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 1439 1fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 1440 1fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 1441 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 1442 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 1443 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS 1444 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 1445 1fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 1446 1fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 1447 1fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 1448 1fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1449 fe389a82Sstroese 1450 5d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 1451 5d110f0aSWilson Callan environment variable, not the BOOTP server. 1452 fe389a82Sstroese 1453 fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1454 fe389a82Sstroese serverip from a DHCP server, it is possible that more 1455 fe389a82Sstroese than one DNS serverip is offered to the client. 1456 fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1457 fe389a82Sstroese serverip will be stored in the additional environment 1458 fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1459 fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 1460 1fe80d79SJon Loeliger is defined. 1461 fe389a82Sstroese 1462 fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1463 fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1464 fe389a82Sstroese need the hostname of the DHCP requester. 1465 5d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 1466 1fe80d79SJon Loeliger of the "hostname" environment variable is passed as 1467 1fe80d79SJon Loeliger option 12 to the DHCP server. 1468 fe389a82Sstroese 1469 d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1470 d9a2f416SAras Vaichas 1471 d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1472 d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1473 d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1474 d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1475 d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1476 d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1477 d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1478 d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1479 d9a2f416SAras Vaichas that one of the retries will be successful but note that 1480 d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1481 d9a2f416SAras Vaichas this delay. 1482 d9a2f416SAras Vaichas 1483 a3d991bdSwdenk - CDP Options: 1484 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1485 a3d991bdSwdenk 1486 a3d991bdSwdenk The device id used in CDP trigger frames. 1487 a3d991bdSwdenk 1488 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1489 a3d991bdSwdenk 1490 a3d991bdSwdenk A two character string which is prefixed to the MAC address 1491 a3d991bdSwdenk of the device. 1492 a3d991bdSwdenk 1493 a3d991bdSwdenk CONFIG_CDP_PORT_ID 1494 a3d991bdSwdenk 1495 a3d991bdSwdenk A printf format string which contains the ascii name of 1496 a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1497 11ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1498 a3d991bdSwdenk 1499 a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1500 a3d991bdSwdenk 1501 a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1502 a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1503 a3d991bdSwdenk 1504 a3d991bdSwdenk CONFIG_CDP_VERSION 1505 a3d991bdSwdenk 1506 a3d991bdSwdenk An ascii string containing the version of the software. 1507 a3d991bdSwdenk 1508 a3d991bdSwdenk CONFIG_CDP_PLATFORM 1509 a3d991bdSwdenk 1510 a3d991bdSwdenk An ascii string containing the name of the platform. 1511 a3d991bdSwdenk 1512 a3d991bdSwdenk CONFIG_CDP_TRIGGER 1513 a3d991bdSwdenk 1514 a3d991bdSwdenk A 32bit integer sent on the trigger. 1515 a3d991bdSwdenk 1516 a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1517 a3d991bdSwdenk 1518 a3d991bdSwdenk A 16bit integer containing the power consumption of the 1519 a3d991bdSwdenk device in .1 of milliwatts. 1520 a3d991bdSwdenk 1521 a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1522 a3d991bdSwdenk 1523 a3d991bdSwdenk A byte containing the id of the VLAN. 1524 a3d991bdSwdenk 1525 c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1526 c609719bSwdenk 1527 c609719bSwdenk Several configurations allow to display the current 1528 c609719bSwdenk status using a LED. For instance, the LED will blink 1529 c609719bSwdenk fast while running U-Boot code, stop blinking as 1530 c609719bSwdenk soon as a reply to a BOOTP request was received, and 1531 c609719bSwdenk start blinking slow once the Linux kernel is running 1532 c609719bSwdenk (supported by a status LED driver in the Linux 1533 c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1534 c609719bSwdenk feature in U-Boot. 1535 c609719bSwdenk 1536 c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1537 c609719bSwdenk 1538 c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1539 c609719bSwdenk on those systems that support this (optional) 1540 c609719bSwdenk feature, like the TQM8xxL modules. 1541 c609719bSwdenk 1542 c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1543 c609719bSwdenk 1544 b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1545 b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1546 11ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1547 c609719bSwdenk 1548 b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1549 602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1550 b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1551 b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1552 c609719bSwdenk command line interface. 1553 c609719bSwdenk 1554 bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1555 c609719bSwdenk 1556 b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1557 b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1558 b37c7e5eSwdenk support for I2C. 1559 c609719bSwdenk 1560 b37c7e5eSwdenk There are several other quantities that must also be 1561 b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1562 c609719bSwdenk 1563 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1564 b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1565 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 1566 11ccc33fSMarcel Ziswiler the CPU's i2c node address). 1567 c609719bSwdenk 1568 8d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1569 a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 1570 8d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 1571 8d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 1572 8d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1573 b37c7e5eSwdenk 1574 5da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 1575 5da71efaSEric Millbrandt 1576 5da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 1577 5da71efaSEric Millbrandt chips might think that the current transfer is still 1578 5da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 1579 5da71efaSEric Millbrandt commands until the slave device responds. 1580 5da71efaSEric Millbrandt 1581 b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1582 b37c7e5eSwdenk 1583 b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1584 b37c7e5eSwdenk then the following macros need to be defined (examples are 1585 b37c7e5eSwdenk from include/configs/lwmon.h): 1586 c609719bSwdenk 1587 c609719bSwdenk I2C_INIT 1588 c609719bSwdenk 1589 b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1590 c609719bSwdenk controller or configure ports. 1591 c609719bSwdenk 1592 b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1593 b37c7e5eSwdenk 1594 c609719bSwdenk I2C_PORT 1595 c609719bSwdenk 1596 c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1597 c609719bSwdenk assumes both bits are on the same port). Valid values 1598 c609719bSwdenk are 0..3 for ports A..D. 1599 c609719bSwdenk 1600 c609719bSwdenk I2C_ACTIVE 1601 c609719bSwdenk 1602 c609719bSwdenk The code necessary to make the I2C data line active 1603 c609719bSwdenk (driven). If the data line is open collector, this 1604 c609719bSwdenk define can be null. 1605 c609719bSwdenk 1606 b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1607 b37c7e5eSwdenk 1608 c609719bSwdenk I2C_TRISTATE 1609 c609719bSwdenk 1610 c609719bSwdenk The code necessary to make the I2C data line tri-stated 1611 c609719bSwdenk (inactive). If the data line is open collector, this 1612 c609719bSwdenk define can be null. 1613 c609719bSwdenk 1614 b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1615 b37c7e5eSwdenk 1616 c609719bSwdenk I2C_READ 1617 c609719bSwdenk 1618 c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1619 c609719bSwdenk FALSE if it is low. 1620 c609719bSwdenk 1621 b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1622 b37c7e5eSwdenk 1623 c609719bSwdenk I2C_SDA(bit) 1624 c609719bSwdenk 1625 c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1626 c609719bSwdenk is FALSE, it clears it (low). 1627 c609719bSwdenk 1628 b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1629 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1630 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1631 b37c7e5eSwdenk 1632 c609719bSwdenk I2C_SCL(bit) 1633 c609719bSwdenk 1634 c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1635 c609719bSwdenk is FALSE, it clears it (low). 1636 c609719bSwdenk 1637 b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1638 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1639 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1640 b37c7e5eSwdenk 1641 c609719bSwdenk I2C_DELAY 1642 c609719bSwdenk 1643 c609719bSwdenk This delay is invoked four times per clock cycle so this 1644 c609719bSwdenk controls the rate of data transfer. The data rate thus 1645 b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1646 b37c7e5eSwdenk like: 1647 b37c7e5eSwdenk 1648 b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1649 c609719bSwdenk 1650 793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1651 793b5726SMike Frysinger 1652 793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1653 793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1654 793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1655 793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1656 793b5726SMike Frysinger 1657 793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1658 793b5726SMike Frysinger the generic GPIO functions. 1659 793b5726SMike Frysinger 1660 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 1661 47cd00faSwdenk 1662 47cd00faSwdenk When a board is reset during an i2c bus transfer 1663 47cd00faSwdenk chips might think that the current transfer is still 1664 47cd00faSwdenk in progress. On some boards it is possible to access 1665 47cd00faSwdenk the i2c SCLK line directly, either by using the 1666 47cd00faSwdenk processor pin as a GPIO or by having a second pin 1667 47cd00faSwdenk connected to the bus. If this option is defined a 1668 47cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 1669 47cd00faSwdenk is run early in the boot sequence. 1670 47cd00faSwdenk 1671 26a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 1672 26a33504SRichard Retanubun 1673 26a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 1674 26a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 1675 26a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 1676 26a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 1677 26a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 1678 26a33504SRichard Retanubun controller provide such a method. It is called at the end of 1679 26a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 1680 26a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 1681 26a33504SRichard Retanubun 1682 17ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 1683 17ea1177Swdenk 1684 17ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 1685 17ea1177Swdenk in u-boot bd_info structure based on u-boot environment 1686 17ea1177Swdenk variable "i2cfast". (see also i2cfast) 1687 17ea1177Swdenk 1688 bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1689 bb99ad6dSBen Warren 1690 bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1691 bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1692 bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1693 bb99ad6dSBen Warren Note that bus numbering is zero-based. 1694 bb99ad6dSBen Warren 1695 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1696 bb99ad6dSBen Warren 1697 bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1698 0f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 1699 0f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 1700 0f89c54bSPeter Tyser a 1D array of device addresses 1701 bb99ad6dSBen Warren 1702 bb99ad6dSBen Warren e.g. 1703 bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1704 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1705 bb99ad6dSBen Warren 1706 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1707 bb99ad6dSBen Warren 1708 bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1709 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1710 bb99ad6dSBen Warren 1711 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1712 bb99ad6dSBen Warren 1713 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1714 be5e6181STimur Tabi 1715 be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1716 be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1717 be5e6181STimur Tabi 1718 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 1719 0dc018ecSStefan Roese 1720 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 1721 0dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 1722 0dc018ecSStefan Roese 1723 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 1724 0dc018ecSStefan Roese 1725 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 1726 0dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 1727 0dc018ecSStefan Roese 1728 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 1729 9ebbb54fSVictor Gallardo 1730 9ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 1731 9ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 1732 9ebbb54fSVictor Gallardo specified DTT device. 1733 9ebbb54fSVictor Gallardo 1734 be5e6181STimur Tabi CONFIG_FSL_I2C 1735 be5e6181STimur Tabi 1736 be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 1737 7817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1738 be5e6181STimur Tabi 1739 67b23a32SHeiko Schocher CONFIG_I2C_MUX 1740 67b23a32SHeiko Schocher 1741 67b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 1742 67b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 1743 67b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 1744 67b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 1745 67b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 1746 67b23a32SHeiko Schocher the muxes to activate this new "bus". 1747 67b23a32SHeiko Schocher 1748 67b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 1749 67b23a32SHeiko Schocher feature! 1750 67b23a32SHeiko Schocher 1751 67b23a32SHeiko Schocher Example: 1752 67b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 1753 67b23a32SHeiko Schocher The First mux with address 70 and channel 6 1754 67b23a32SHeiko Schocher The Second mux with address 71 and channel 4 1755 67b23a32SHeiko Schocher 1756 67b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 1757 67b23a32SHeiko Schocher 1758 67b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 1759 67b23a32SHeiko Schocher of I2C Busses with muxes: 1760 67b23a32SHeiko Schocher 1761 67b23a32SHeiko Schocher => i2c bus 1762 67b23a32SHeiko Schocher Busses reached over muxes: 1763 67b23a32SHeiko Schocher Bus ID: 2 1764 67b23a32SHeiko Schocher reached over Mux(es): 1765 67b23a32SHeiko Schocher pca9544a@70 ch: 4 1766 67b23a32SHeiko Schocher Bus ID: 3 1767 67b23a32SHeiko Schocher reached over Mux(es): 1768 67b23a32SHeiko Schocher pca9544a@70 ch: 6 1769 67b23a32SHeiko Schocher pca9544a@71 ch: 4 1770 67b23a32SHeiko Schocher => 1771 67b23a32SHeiko Schocher 1772 67b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1773 f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1774 f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 1775 67b23a32SHeiko Schocher the channel 4. 1776 67b23a32SHeiko Schocher 1777 67b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1778 f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 1779 67b23a32SHeiko Schocher the 2 muxes. 1780 67b23a32SHeiko Schocher 1781 67b23a32SHeiko Schocher This option is actually implemented for the bitbanging 1782 67b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 1783 67b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 1784 67b23a32SHeiko Schocher to add this option to other architectures. 1785 67b23a32SHeiko Schocher 1786 2ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 1787 2ac6985aSAndrew Dyer 1788 2ac6985aSAndrew Dyer defining this will force the i2c_read() function in 1789 2ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 1790 2ac6985aSAndrew Dyer between writing the address pointer and reading the 1791 2ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 1792 2ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 1793 2ac6985aSAndrew Dyer devices can use either method, but some require one or 1794 2ac6985aSAndrew Dyer the other. 1795 be5e6181STimur Tabi 1796 c609719bSwdenk- SPI Support: CONFIG_SPI 1797 c609719bSwdenk 1798 c609719bSwdenk Enables SPI driver (so far only tested with 1799 c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1800 c609719bSwdenk D/As on the SACSng board) 1801 c609719bSwdenk 1802 6639562eSYoshihiro Shimoda CONFIG_SH_SPI 1803 6639562eSYoshihiro Shimoda 1804 6639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 1805 6639562eSYoshihiro Shimoda only SH7757 is supported. 1806 6639562eSYoshihiro Shimoda 1807 c609719bSwdenk CONFIG_SPI_X 1808 c609719bSwdenk 1809 c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1810 c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1811 c609719bSwdenk 1812 c609719bSwdenk CONFIG_SOFT_SPI 1813 c609719bSwdenk 1814 c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1815 c609719bSwdenk using hardware support. This is a general purpose 1816 c609719bSwdenk driver that only requires three general I/O port pins 1817 c609719bSwdenk (two outputs, one input) to function. If this is 1818 c609719bSwdenk defined, the board configuration must define several 1819 c609719bSwdenk SPI configuration items (port pins to use, etc). For 1820 c609719bSwdenk an example, see include/configs/sacsng.h. 1821 c609719bSwdenk 1822 04a9e118SBen Warren CONFIG_HARD_SPI 1823 04a9e118SBen Warren 1824 04a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 1825 04a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 1826 04a9e118SBen Warren must define a list of chip-select function pointers. 1827 04a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 1828 04a9e118SBen Warren example, see include/configs/mpc8349emds.h. 1829 04a9e118SBen Warren 1830 38254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 1831 38254f45SGuennadi Liakhovetski 1832 38254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 1833 38254f45SGuennadi Liakhovetski SoCs. Currently only i.MX31 is supported. 1834 38254f45SGuennadi Liakhovetski 1835 0133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 1836 0133502eSMatthias Fuchs 1837 0133502eSMatthias Fuchs Enables FPGA subsystem. 1838 0133502eSMatthias Fuchs 1839 0133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 1840 0133502eSMatthias Fuchs 1841 0133502eSMatthias Fuchs Enables support for specific chip vendors. 1842 0133502eSMatthias Fuchs (ALTERA, XILINX) 1843 0133502eSMatthias Fuchs 1844 0133502eSMatthias Fuchs CONFIG_FPGA_<family> 1845 0133502eSMatthias Fuchs 1846 0133502eSMatthias Fuchs Enables support for FPGA family. 1847 0133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 1848 0133502eSMatthias Fuchs 1849 0133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1850 c609719bSwdenk 1851 c609719bSwdenk Specify the number of FPGA devices to support. 1852 c609719bSwdenk 1853 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1854 c609719bSwdenk 1855 c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1856 c609719bSwdenk 1857 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1858 c609719bSwdenk 1859 c609719bSwdenk Enable checks on FPGA configuration interface busy 1860 c609719bSwdenk status by the configuration function. This option 1861 c609719bSwdenk will require a board or device specific function to 1862 c609719bSwdenk be written. 1863 c609719bSwdenk 1864 c609719bSwdenk CONFIG_FPGA_DELAY 1865 c609719bSwdenk 1866 c609719bSwdenk If defined, a function that provides delays in the FPGA 1867 c609719bSwdenk configuration driver. 1868 c609719bSwdenk 1869 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 1870 c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1871 c609719bSwdenk 1872 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 1873 c609719bSwdenk 1874 c609719bSwdenk Check for configuration errors during FPGA bitfile 1875 c609719bSwdenk loading. For example, abort during Virtex II 1876 c609719bSwdenk configuration if the INIT_B line goes low (which 1877 c609719bSwdenk indicated a CRC error). 1878 c609719bSwdenk 1879 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 1880 c609719bSwdenk 1881 c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1882 c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1883 c609719bSwdenk FPGA configuration sequence. The default time is 500 1884 11ccc33fSMarcel Ziswiler ms. 1885 c609719bSwdenk 1886 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 1887 c609719bSwdenk 1888 c609719bSwdenk Maximum time to wait for BUSY to deassert during 1889 11ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 1890 c609719bSwdenk 1891 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 1892 c609719bSwdenk 1893 c609719bSwdenk Time to wait after FPGA configuration. The default is 1894 11ccc33fSMarcel Ziswiler 200 ms. 1895 c609719bSwdenk 1896 c609719bSwdenk- Configuration Management: 1897 c609719bSwdenk CONFIG_IDENT_STRING 1898 c609719bSwdenk 1899 c609719bSwdenk If defined, this string will be added to the U-Boot 1900 c609719bSwdenk version information (U_BOOT_VERSION) 1901 c609719bSwdenk 1902 c609719bSwdenk- Vendor Parameter Protection: 1903 c609719bSwdenk 1904 c609719bSwdenk U-Boot considers the values of the environment 1905 c609719bSwdenk variables "serial#" (Board Serial Number) and 1906 7152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1907 c609719bSwdenk are set once by the board vendor / manufacturer, and 1908 c609719bSwdenk protects these variables from casual modification by 1909 c609719bSwdenk the user. Once set, these variables are read-only, 1910 c609719bSwdenk and write or delete attempts are rejected. You can 1911 11ccc33fSMarcel Ziswiler change this behaviour: 1912 c609719bSwdenk 1913 c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1914 c609719bSwdenk file, the write protection for vendor parameters is 1915 47cd00faSwdenk completely disabled. Anybody can change or delete 1916 c609719bSwdenk these parameters. 1917 c609719bSwdenk 1918 c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1919 c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 1920 11ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 1921 c609719bSwdenk which can be changed exactly ONCE by the user. [The 1922 c609719bSwdenk serial# is unaffected by this, i. e. it remains 1923 c609719bSwdenk read-only.] 1924 c609719bSwdenk 1925 c609719bSwdenk- Protected RAM: 1926 c609719bSwdenk CONFIG_PRAM 1927 c609719bSwdenk 1928 c609719bSwdenk Define this variable to enable the reservation of 1929 c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1930 c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1931 c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1932 c609719bSwdenk this default value by defining an environment 1933 c609719bSwdenk variable "pram" to the number of kB you want to 1934 c609719bSwdenk reserve. Note that the board info structure will 1935 c609719bSwdenk still show the full amount of RAM. If pRAM is 1936 c609719bSwdenk reserved, a new environment variable "mem" will 1937 c609719bSwdenk automatically be defined to hold the amount of 1938 c609719bSwdenk remaining RAM in a form that can be passed as boot 1939 c609719bSwdenk argument to Linux, for instance like that: 1940 c609719bSwdenk 1941 fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1942 c609719bSwdenk saveenv 1943 c609719bSwdenk 1944 c609719bSwdenk This way you can tell Linux not to use this memory, 1945 c609719bSwdenk either, which results in a memory region that will 1946 c609719bSwdenk not be affected by reboots. 1947 c609719bSwdenk 1948 c609719bSwdenk *WARNING* If your board configuration uses automatic 1949 c609719bSwdenk detection of the RAM size, you must make sure that 1950 c609719bSwdenk this memory test is non-destructive. So far, the 1951 c609719bSwdenk following board configurations are known to be 1952 c609719bSwdenk "pRAM-clean": 1953 c609719bSwdenk 1954 c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1955 c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1956 544d97e9SWolfgang Denk FLAGADM, TQM8260 1957 c609719bSwdenk 1958 c609719bSwdenk- Error Recovery: 1959 c609719bSwdenk CONFIG_PANIC_HANG 1960 c609719bSwdenk 1961 c609719bSwdenk Define this variable to stop the system in case of a 1962 c609719bSwdenk fatal error, so that you have to reset it manually. 1963 c609719bSwdenk This is probably NOT a good idea for an embedded 1964 11ccc33fSMarcel Ziswiler system where you want the system to reboot 1965 c609719bSwdenk automatically as fast as possible, but it may be 1966 c609719bSwdenk useful during development since you can try to debug 1967 c609719bSwdenk the conditions that lead to the situation. 1968 c609719bSwdenk 1969 c609719bSwdenk CONFIG_NET_RETRY_COUNT 1970 c609719bSwdenk 1971 c609719bSwdenk This variable defines the number of retries for 1972 c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1973 c609719bSwdenk before giving up the operation. If not defined, a 1974 c609719bSwdenk default value of 5 is used. 1975 c609719bSwdenk 1976 40cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 1977 40cb90eeSGuennadi Liakhovetski 1978 40cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 1979 40cb90eeSGuennadi Liakhovetski 1980 c609719bSwdenk- Command Interpreter: 1981 8078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 1982 04a85b3bSwdenk 1983 04a85b3bSwdenk Enable auto completion of commands using TAB. 1984 04a85b3bSwdenk 1985 8078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 1986 8078f1a5SWolfgang Denk for the "hush" shell. 1987 8078f1a5SWolfgang Denk 1988 8078f1a5SWolfgang Denk 1989 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 1990 c609719bSwdenk 1991 c609719bSwdenk Define this variable to enable the "hush" shell (from 1992 c609719bSwdenk Busybox) as command line interpreter, thus enabling 1993 c609719bSwdenk powerful command line syntax like 1994 c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 1995 c609719bSwdenk constructs ("shell scripts"). 1996 c609719bSwdenk 1997 c609719bSwdenk If undefined, you get the old, much simpler behaviour 1998 c609719bSwdenk with a somewhat smaller memory footprint. 1999 c609719bSwdenk 2000 c609719bSwdenk 2001 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2002 c609719bSwdenk 2003 c609719bSwdenk This defines the secondary prompt string, which is 2004 c609719bSwdenk printed when the command interpreter needs more input 2005 c609719bSwdenk to complete a command. Usually "> ". 2006 c609719bSwdenk 2007 c609719bSwdenk Note: 2008 c609719bSwdenk 2009 c609719bSwdenk In the current implementation, the local variables 2010 c609719bSwdenk space and global environment variables space are 2011 c609719bSwdenk separated. Local variables are those you define by 2012 3b57fe0aSwdenk simply typing `name=value'. To access a local 2013 c609719bSwdenk variable later on, you have write `$name' or 2014 3b57fe0aSwdenk `${name}'; to execute the contents of a variable 2015 3b57fe0aSwdenk directly type `$name' at the command prompt. 2016 c609719bSwdenk 2017 c609719bSwdenk Global environment variables are those you use 2018 c609719bSwdenk setenv/printenv to work with. To run a command stored 2019 c609719bSwdenk in such a variable, you need to use the run command, 2020 c609719bSwdenk and you must not use the '$' sign to access them. 2021 c609719bSwdenk 2022 c609719bSwdenk To store commands and special characters in a 2023 c609719bSwdenk variable, please use double quotation marks 2024 c609719bSwdenk surrounding the whole text of the variable, instead 2025 c609719bSwdenk of the backslashes before semicolons and special 2026 c609719bSwdenk symbols. 2027 c609719bSwdenk 2028 aa0c71acSWolfgang Denk- Commandline Editing and History: 2029 aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2030 aa0c71acSWolfgang Denk 2031 11ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2032 aa0c71acSWolfgang Denk commandline input operations 2033 aa0c71acSWolfgang Denk 2034 a8c7c708Swdenk- Default Environment: 2035 c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2036 c609719bSwdenk 2037 c609719bSwdenk Define this to contain any number of null terminated 2038 c609719bSwdenk strings (variable = value pairs) that will be part of 2039 7152b1d0Swdenk the default environment compiled into the boot image. 2040 2262cfeeSwdenk 2041 c609719bSwdenk For example, place something like this in your 2042 c609719bSwdenk board's config file: 2043 c609719bSwdenk 2044 c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2045 c609719bSwdenk "myvar1=value1\0" \ 2046 c609719bSwdenk "myvar2=value2\0" 2047 c609719bSwdenk 2048 c609719bSwdenk Warning: This method is based on knowledge about the 2049 c609719bSwdenk internal format how the environment is stored by the 2050 2262cfeeSwdenk U-Boot code. This is NOT an official, exported 2051 c609719bSwdenk interface! Although it is unlikely that this format 2052 7152b1d0Swdenk will change soon, there is no guarantee either. 2053 c609719bSwdenk You better know what you are doing here. 2054 c609719bSwdenk 2055 c609719bSwdenk Note: overly (ab)use of the default environment is 2056 c609719bSwdenk discouraged. Make sure to check other ways to preset 2057 74de7aefSWolfgang Denk the environment like the "source" command or the 2058 c609719bSwdenk boot command first. 2059 c609719bSwdenk 2060 a8c7c708Swdenk- DataFlash Support: 2061 2abbe075Swdenk CONFIG_HAS_DATAFLASH 2062 2abbe075Swdenk 2063 2abbe075Swdenk Defining this option enables DataFlash features and 2064 2abbe075Swdenk allows to read/write in Dataflash via the standard 2065 2abbe075Swdenk commands cp, md... 2066 2abbe075Swdenk 2067 3f85ce27Swdenk- SystemACE Support: 2068 3f85ce27Swdenk CONFIG_SYSTEMACE 2069 3f85ce27Swdenk 2070 3f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 2071 3f85ce27Swdenk chips attached via some sort of local bus. The address 2072 11ccc33fSMarcel Ziswiler of the chip must also be defined in the 2073 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 2074 3f85ce27Swdenk 2075 3f85ce27Swdenk #define CONFIG_SYSTEMACE 2076 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 2077 3f85ce27Swdenk 2078 3f85ce27Swdenk When SystemACE support is added, the "ace" device type 2079 3f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 2080 3f85ce27Swdenk 2081 ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2082 ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2083 ecb0ccd9SWolfgang Denk 2084 28cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2085 ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 2086 28cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2087 ecb0ccd9SWolfgang Denk number generator is used. 2088 ecb0ccd9SWolfgang Denk 2089 28cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 2090 28cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 2091 28cb9375SWolfgang Denk defined, the normal port 69 is used. 2092 28cb9375SWolfgang Denk 2093 28cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2094 ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2095 ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2096 ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2097 ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2098 ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2099 ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2100 ecb0ccd9SWolfgang Denk 2101 a8c7c708Swdenk- Show boot progress: 2102 c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2103 c609719bSwdenk 2104 c609719bSwdenk Defining this option allows to add some board- 2105 c609719bSwdenk specific code (calling a user-provided function 2106 c609719bSwdenk "show_boot_progress(int)") that enables you to show 2107 c609719bSwdenk the system's boot progress on some display (for 2108 c609719bSwdenk example, some LED's) on your board. At the moment, 2109 c609719bSwdenk the following checkpoints are implemented: 2110 c609719bSwdenk 2111 8ae86b76SWolfgang Denk- Standalone program support: 2112 8ae86b76SWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 2113 8ae86b76SWolfgang Denk 2114 8ae86b76SWolfgang Denk This option allows to define board specific values 2115 8ae86b76SWolfgang Denk for the address where standalone program gets loaded, 2116 8ae86b76SWolfgang Denk thus overwriting the architecutre dependent default 2117 8ae86b76SWolfgang Denk settings. 2118 8ae86b76SWolfgang Denk 2119 d32a1a4cSMinkyu Kang- Frame Buffer Address: 2120 d32a1a4cSMinkyu Kang CONFIG_FB_ADDR 2121 d32a1a4cSMinkyu Kang 2122 d32a1a4cSMinkyu Kang Define CONFIG_FB_ADDR if you want to use specific address for 2123 d32a1a4cSMinkyu Kang frame buffer. 2124 d32a1a4cSMinkyu Kang Then system will reserve the frame buffer address to defined address 2125 d32a1a4cSMinkyu Kang instead of lcd_setmem (this function grab the memory for frame buffer 2126 d32a1a4cSMinkyu Kang by panel's size). 2127 d32a1a4cSMinkyu Kang 2128 d32a1a4cSMinkyu Kang Please see board_init_f function. 2129 d32a1a4cSMinkyu Kang 2130 d32a1a4cSMinkyu Kang If you want this config option then, 2131 d32a1a4cSMinkyu Kang please define it at your board config file 2132 d32a1a4cSMinkyu Kang 2133 1372cce2SMarian BalakowiczLegacy uImage format: 2134 1372cce2SMarian Balakowicz 2135 c609719bSwdenk Arg Where When 2136 c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2137 c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2138 c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2139 c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2140 c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2141 c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2142 c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2143 c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2144 c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 2145 1372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2146 c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2147 c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2148 c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2149 c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 2150 1372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2151 c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 2152 1372cce2SMarian Balakowicz 2153 1372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 2154 1372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 2155 1372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 2156 1372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 2157 1372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 2158 1372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 2159 1372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 2160 11ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 2161 1372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 2162 1372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 2163 1372cce2SMarian Balakowicz 2164 ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2165 c609719bSwdenk 2166 a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 2167 63e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 2168 63e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 2169 63e73c9aSwdenk 2170 566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2171 566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2172 566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2173 566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2174 566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2175 566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2176 566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2177 566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2178 566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2179 566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2180 566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2181 566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2182 566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2183 566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2184 566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2185 566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2186 566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2187 566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2188 566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2189 566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2190 566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2191 566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2192 566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2193 566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2194 566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2195 566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2196 566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2197 566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2198 566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2199 566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2200 566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2201 566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2202 566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2203 566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2204 566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2205 566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2206 566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2207 566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2208 566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2209 566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2210 566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2211 566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2212 566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2213 566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2214 566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2215 566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2216 566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2217 c609719bSwdenk 2218 566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2219 c609719bSwdenk 2220 566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2221 566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2222 566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2223 206c60cbSwdenk 2224 566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2225 566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 2226 11ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2227 566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2228 566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2229 566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 2230 74de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 2231 74de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2232 566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2233 c609719bSwdenk 2234 1372cce2SMarian BalakowiczFIT uImage format: 2235 1372cce2SMarian Balakowicz 2236 1372cce2SMarian Balakowicz Arg Where When 2237 1372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 2238 1372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 2239 1372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 2240 1372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 2241 1372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 2242 1372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2243 f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 2244 1372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 2245 1372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 2246 1372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 2247 1372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 2248 1372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 2249 11ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 2250 11ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 2251 1372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 2252 1372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 2253 1372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 2254 1372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 2255 1372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 2256 1372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 2257 1372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 2258 1372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 2259 1372cce2SMarian Balakowicz 2260 1372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 2261 1372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 2262 1372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 2263 11ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 2264 1372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 2265 1372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 2266 1372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 2267 1372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 2268 1372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 2269 1372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 2270 1372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 2271 1372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 2272 1372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 2273 1372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 2274 1372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 2275 1372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 2276 1372cce2SMarian Balakowicz 2277 11ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 2278 1372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 2279 1372cce2SMarian Balakowicz 2280 11ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 2281 1372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 2282 1372cce2SMarian Balakowicz 2283 11ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 2284 1372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 2285 1372cce2SMarian Balakowicz 2286 cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2287 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2288 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2289 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2290 cccfc2abSDetlev Zundel 2291 cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2292 cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2293 cccfc2abSDetlev Zundel 2294 cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2295 cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2296 cccfc2abSDetlev Zundel 2297 cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2298 cccfc2abSDetlev Zundel Needed for mtdparts command support. 2299 cccfc2abSDetlev Zundel 2300 cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2301 cccfc2abSDetlev Zundel 2302 cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2303 cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2304 cccfc2abSDetlev Zundel 2305 6a11cf48SDaniel Schwierzeck- SPL framework 2306 6a11cf48SDaniel Schwierzeck CONFIG_SPL 2307 6a11cf48SDaniel Schwierzeck Enable building of SPL globally. 2308 6a11cf48SDaniel Schwierzeck 2309 6a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 2310 6a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 2311 6a11cf48SDaniel Schwierzeck 2312 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LDSCRIPT 2313 6a11cf48SDaniel Schwierzeck LDSCRIPT for linking the SPL binary. 2314 6a11cf48SDaniel Schwierzeck 2315 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 2316 6a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 2317 6a11cf48SDaniel Schwierzeck 2318 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 2319 6a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 2320 6a11cf48SDaniel Schwierzeck 2321 6a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 2322 6a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 2323 6a11cf48SDaniel Schwierzeck 2324 6a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 2325 6a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 2326 6a11cf48SDaniel Schwierzeck 2327 6a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 2328 6a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 2329 6a11cf48SDaniel Schwierzeck 2330 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 2331 6a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 2332 6a11cf48SDaniel Schwierzeck 2333 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 2334 6a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 2335 6a11cf48SDaniel Schwierzeck 2336 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 2337 6a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 2338 6a11cf48SDaniel Schwierzeck 2339 6a11cf48SDaniel Schwierzeck CONFIG_SPL_FAT_SUPPORT 2340 6a11cf48SDaniel Schwierzeck Support for fs/fat/libfat.o in SPL binary 2341 6a11cf48SDaniel Schwierzeck 2342 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 2343 6a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 2344 1372cce2SMarian Balakowicz 2345 c609719bSwdenkModem Support: 2346 c609719bSwdenk-------------- 2347 c609719bSwdenk 2348 566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2349 c609719bSwdenk 2350 11ccc33fSMarcel Ziswiler- Modem support enable: 2351 c609719bSwdenk CONFIG_MODEM_SUPPORT 2352 c609719bSwdenk 2353 c609719bSwdenk- RTS/CTS Flow control enable: 2354 c609719bSwdenk CONFIG_HWFLOW 2355 c609719bSwdenk 2356 c609719bSwdenk- Modem debug support: 2357 c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2358 c609719bSwdenk 2359 c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2360 c609719bSwdenk for modem support. Useful only with BDI2000. 2361 c609719bSwdenk 2362 a8c7c708Swdenk- Interrupt support (PPC): 2363 a8c7c708Swdenk 2364 a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2365 a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 2366 11ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2367 a8c7c708Swdenk should set decrementer_count to appropriate value. If 2368 11ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2369 a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 2370 11ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2371 a8c7c708Swdenk specific handling. If board has watchdog / status_led 2372 a8c7c708Swdenk / other_activity_monitor it works automatically from 2373 a8c7c708Swdenk general timer_interrupt(). 2374 a8c7c708Swdenk 2375 c609719bSwdenk- General: 2376 c609719bSwdenk 2377 c609719bSwdenk In the target system modem support is enabled when a 2378 c609719bSwdenk specific key (key combination) is pressed during 2379 c609719bSwdenk power-on. Otherwise U-Boot will boot normally 2380 11ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2381 c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2382 c609719bSwdenk function, returning 1 and thus enabling modem 2383 c609719bSwdenk initialization. 2384 c609719bSwdenk 2385 c609719bSwdenk If there are no modem init strings in the 2386 c609719bSwdenk environment, U-Boot proceed to autoboot; the 2387 c609719bSwdenk previous output (banner, info printfs) will be 2388 11ccc33fSMarcel Ziswiler suppressed, though. 2389 c609719bSwdenk 2390 c609719bSwdenk See also: doc/README.Modem 2391 c609719bSwdenk 2392 c609719bSwdenk 2393 c609719bSwdenkConfiguration Settings: 2394 c609719bSwdenk----------------------- 2395 c609719bSwdenk 2396 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2397 c609719bSwdenk undefine this when you're short of memory. 2398 c609719bSwdenk 2399 2fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 2400 2fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 2401 2fb2604dSPeter Tyser 2402 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2403 c609719bSwdenk prompt for user input. 2404 c609719bSwdenk 2405 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2406 c609719bSwdenk 2407 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2408 c609719bSwdenk 2409 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2410 c609719bSwdenk 2411 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2412 c609719bSwdenk the application (usually a Linux kernel) when it is 2413 c609719bSwdenk booted 2414 c609719bSwdenk 2415 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2416 c609719bSwdenk List of legal baudrate settings for this board. 2417 c609719bSwdenk 2418 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2419 c609719bSwdenk Suppress display of console information at boot. 2420 c609719bSwdenk 2421 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2422 c609719bSwdenk If the board specific function 2423 c609719bSwdenk extern int overwrite_console (void); 2424 c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2425 c609719bSwdenk serial port, else the settings in the environment are used. 2426 c609719bSwdenk 2427 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2428 c609719bSwdenk Enable the call to overwrite_console(). 2429 c609719bSwdenk 2430 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2431 c609719bSwdenk Enable overwrite of previous console environment settings. 2432 c609719bSwdenk 2433 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2434 c609719bSwdenk Begin and End addresses of the area used by the 2435 c609719bSwdenk simple memory test. 2436 c609719bSwdenk 2437 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2438 c609719bSwdenk Enable an alternate, more extensive memory test. 2439 c609719bSwdenk 2440 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 2441 5f535fe1Swdenk Scratch address used by the alternate memory test 2442 5f535fe1Swdenk You only need to set this if address zero isn't writeable 2443 5f535fe1Swdenk 2444 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 2445 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 2446 14f73ca6SStefan Roese this specified memory area will get subtracted from the top 2447 11ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 2448 14f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 2449 14f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 2450 14f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 2451 5e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 2452 14f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 2453 5e12e75dSStefan Roese will have to get fixed in Linux additionally. 2454 14f73ca6SStefan Roese 2455 14f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 2456 14f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 2457 14f73ca6SStefan Roese be touched. 2458 14f73ca6SStefan Roese 2459 14f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 2460 14f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 2461 14f73ca6SStefan Roese then the end address of the Linux memory will be located at a 2462 14f73ca6SStefan Roese non page size aligned address and this could cause major 2463 14f73ca6SStefan Roese problems. 2464 14f73ca6SStefan Roese 2465 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2466 c609719bSwdenk Default load address for network file downloads 2467 c609719bSwdenk 2468 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2469 c609719bSwdenk Enable temporary baudrate change while serial download 2470 c609719bSwdenk 2471 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2472 c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2473 c609719bSwdenk 2474 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2475 c609719bSwdenk Physical start address of Motherboard I/O (if using a 2476 c609719bSwdenk Cogent motherboard) 2477 c609719bSwdenk 2478 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2479 c609719bSwdenk Physical start address of Flash memory. 2480 c609719bSwdenk 2481 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2482 c609719bSwdenk Physical start address of boot monitor code (set by 2483 c609719bSwdenk make config files to be same as the text base address 2484 14d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 2485 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2486 c609719bSwdenk 2487 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 2488 3b57fe0aSwdenk Size of memory reserved for monitor code, used to 2489 3b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 2490 3b57fe0aSwdenk embedded within the U-Boot image, or in a separate 2491 3b57fe0aSwdenk flash sector. 2492 c609719bSwdenk 2493 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2494 c609719bSwdenk Size of DRAM reserved for malloc() use. 2495 c609719bSwdenk 2496 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 2497 15940c9aSStefan Roese Normally compressed uImages are limited to an 2498 15940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 2499 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 2500 15940c9aSStefan Roese to adjust this setting to your needs. 2501 c609719bSwdenk 2502 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2503 c609719bSwdenk Maximum size of memory mapped by the startup code of 2504 c609719bSwdenk the Linux kernel; all data that must be processed by 2505 7d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 2506 7d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 2507 7d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 2508 7d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2509 c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2510 c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2511 c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2512 c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2513 c609719bSwdenk 2514 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2515 fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2516 fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2517 fca43cc8SJohn Rigby is enabled. 2518 fca43cc8SJohn Rigby 2519 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2520 fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2521 fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2522 fca43cc8SJohn Rigby 2523 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2524 fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2525 fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2526 fca43cc8SJohn Rigby 2527 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2528 c609719bSwdenk Max number of Flash memory banks 2529 c609719bSwdenk 2530 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2531 c609719bSwdenk Max number of sectors on a Flash chip 2532 c609719bSwdenk 2533 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2534 c609719bSwdenk Timeout for Flash erase operations (in ms) 2535 c609719bSwdenk 2536 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2537 c609719bSwdenk Timeout for Flash write operations (in ms) 2538 c609719bSwdenk 2539 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 2540 8564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 2541 8564acf9Swdenk 2542 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 2543 8564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 2544 8564acf9Swdenk 2545 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 2546 8564acf9Swdenk If defined, hardware flash sectors protection is used 2547 8564acf9Swdenk instead of U-Boot software protection. 2548 8564acf9Swdenk 2549 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2550 c609719bSwdenk 2551 c609719bSwdenk Enable TFTP transfers directly to flash memory; 2552 c609719bSwdenk without this option such a download has to be 2553 c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2554 c609719bSwdenk copy from RAM to flash. 2555 c609719bSwdenk 2556 c609719bSwdenk The two-step approach is usually more reliable, since 2557 c609719bSwdenk you can check if the download worked before you erase 2558 11ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 2559 11ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2560 c609719bSwdenk downloaded image) this option may be very useful. 2561 c609719bSwdenk 2562 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2563 c609719bSwdenk Define if the flash driver uses extra elements in the 2564 5653fc33Swdenk common flash structure for storing flash geometry. 2565 5653fc33Swdenk 2566 00b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 2567 5653fc33Swdenk This option also enables the building of the cfi_flash driver 2568 5653fc33Swdenk in the drivers directory 2569 53cf9435Sstroese 2570 91809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 2571 91809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 2572 91809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 2573 91809ed5SPiotr Ziecik to the MTD layer. 2574 91809ed5SPiotr Ziecik 2575 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 2576 96ef831fSGuennadi Liakhovetski Use buffered writes to flash. 2577 96ef831fSGuennadi Liakhovetski 2578 96ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 2579 96ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 2580 96ef831fSGuennadi Liakhovetski write commands. 2581 96ef831fSGuennadi Liakhovetski 2582 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 2583 5568e613SStefan Roese If this option is defined, the common CFI flash doesn't 2584 5568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 2585 5568e613SStefan Roese is useful, if some of the configured banks are only 2586 5568e613SStefan Roese optionally available. 2587 5568e613SStefan Roese 2588 9a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 2589 9a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 2590 9a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 2591 9a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 2592 9a042e9cSJerry Van Baren 2593 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 2594 11ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 2595 11ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 2596 53cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 2597 53cf9435Sstroese buffers can be full shortly after enabling the interface 2598 11ccc33fSMarcel Ziswiler on high Ethernet traffic. 2599 53cf9435Sstroese Defaults to 4 if not defined. 2600 c609719bSwdenk 2601 ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2602 ea882bafSWolfgang Denk 2603 ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2604 ea882bafSWolfgang Denk internally to store the environment settings. The default 2605 ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2606 ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2607 ea882bafSWolfgang Denk lib/hashtable.c for details. 2608 ea882bafSWolfgang Denk 2609 c609719bSwdenkThe following definitions that deal with the placement and management 2610 c609719bSwdenkof environment data (variable area); in general, we support the 2611 c609719bSwdenkfollowing configurations: 2612 c609719bSwdenk 2613 c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2614 c3eb3fe4SMike Frysinger 2615 c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2616 c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2617 c3eb3fe4SMike Frysinger 2618 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2619 c609719bSwdenk 2620 c609719bSwdenk Define this if the environment is in flash memory. 2621 c609719bSwdenk 2622 c609719bSwdenk a) The environment occupies one whole flash sector, which is 2623 c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2624 c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2625 c609719bSwdenk sector" type flash chips, which have several smaller 2626 c609719bSwdenk sectors at the start or the end. For instance, such a 2627 c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2628 c609719bSwdenk such a case you would place the environment in one of the 2629 c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2630 c609719bSwdenk "top boot sector" type flash chips, you would put the 2631 c609719bSwdenk environment in one of the last sectors, leaving a gap 2632 c609719bSwdenk between U-Boot and the environment. 2633 c609719bSwdenk 2634 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2635 c609719bSwdenk 2636 c609719bSwdenk Offset of environment data (variable area) to the 2637 c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2638 c609719bSwdenk type flash chips the second sector can be used: the offset 2639 c609719bSwdenk for this sector is given here. 2640 c609719bSwdenk 2641 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2642 c609719bSwdenk 2643 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2644 c609719bSwdenk 2645 c609719bSwdenk This is just another way to specify the start address of 2646 c609719bSwdenk the flash sector containing the environment (instead of 2647 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2648 c609719bSwdenk 2649 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2650 c609719bSwdenk 2651 c609719bSwdenk Size of the sector containing the environment. 2652 c609719bSwdenk 2653 c609719bSwdenk 2654 c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2655 c609719bSwdenk In such a case you don't want to spend a whole sector for 2656 c609719bSwdenk the environment. 2657 c609719bSwdenk 2658 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2659 c609719bSwdenk 2660 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 2661 0e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2662 c609719bSwdenk of this flash sector for the environment. This saves 2663 c609719bSwdenk memory for the RAM copy of the environment. 2664 c609719bSwdenk 2665 c609719bSwdenk It may also save flash memory if you decide to use this 2666 c609719bSwdenk when your environment is "embedded" within U-Boot code, 2667 c609719bSwdenk since then the remainder of the flash sector could be used 2668 c609719bSwdenk for U-Boot code. It should be pointed out that this is 2669 c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2670 c609719bSwdenk updating the environment in flash makes it always 2671 c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2672 c609719bSwdenk wrong before the contents has been restored from a copy in 2673 c609719bSwdenk RAM, your target system will be dead. 2674 c609719bSwdenk 2675 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 2676 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2677 c609719bSwdenk 2678 c609719bSwdenk These settings describe a second storage area used to hold 2679 11ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 2680 3e38691eSwdenk a valid backup copy in case there is a power failure during 2681 c609719bSwdenk a "saveenv" operation. 2682 c609719bSwdenk 2683 c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2684 c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2685 c609719bSwdenkaccordingly! 2686 c609719bSwdenk 2687 c609719bSwdenk 2688 9314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2689 c609719bSwdenk 2690 c609719bSwdenk Define this if you have some non-volatile memory device 2691 c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2692 c609719bSwdenk environment. 2693 c609719bSwdenk 2694 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2695 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2696 c609719bSwdenk 2697 11ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2698 c609719bSwdenk want to use for environment. It is assumed that this memory 2699 c609719bSwdenk can just be read and written to, without any special 2700 c609719bSwdenk provision. 2701 c609719bSwdenk 2702 c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2703 c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 2704 11ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2705 c609719bSwdenkU-Boot will hang. 2706 c609719bSwdenk 2707 c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2708 c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2709 c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2710 c609719bSwdenkto save the current settings. 2711 c609719bSwdenk 2712 c609719bSwdenk 2713 bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2714 c609719bSwdenk 2715 c609719bSwdenk Use this if you have an EEPROM or similar serial access 2716 c609719bSwdenk device and a driver for it. 2717 c609719bSwdenk 2718 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2719 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2720 c609719bSwdenk 2721 c609719bSwdenk These two #defines specify the offset and size of the 2722 c609719bSwdenk environment area within the total memory of your EEPROM. 2723 c609719bSwdenk 2724 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2725 c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2726 c609719bSwdenk The default address is zero. 2727 c609719bSwdenk 2728 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2729 c609719bSwdenk If defined, the number of bits used to address bytes in a 2730 c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2731 c609719bSwdenk would require six bits. 2732 c609719bSwdenk 2733 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2734 c609719bSwdenk If defined, the number of milliseconds to delay between 2735 c609719bSwdenk page writes. The default is zero milliseconds. 2736 c609719bSwdenk 2737 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2738 c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2739 c609719bSwdenk that this is NOT the chip address length! 2740 c609719bSwdenk 2741 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 2742 5cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 2743 5cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 2744 5cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 2745 5cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 2746 5cf91d6bSwdenk byte chips. 2747 5cf91d6bSwdenk 2748 5cf91d6bSwdenk Note that we consider the length of the address field to 2749 5cf91d6bSwdenk still be one byte because the extra address bits are hidden 2750 5cf91d6bSwdenk in the chip address. 2751 5cf91d6bSwdenk 2752 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2753 c609719bSwdenk The size in bytes of the EEPROM device. 2754 c609719bSwdenk 2755 548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 2756 548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 2757 548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 2758 548738b4SHeiko Schocher 2759 548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 2760 548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 2761 548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 2762 548738b4SHeiko Schocher EEPROM. For example: 2763 548738b4SHeiko Schocher 2764 548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 2765 548738b4SHeiko Schocher 2766 548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 2767 548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 2768 c609719bSwdenk 2769 057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 2770 5779d8d9Swdenk 2771 5779d8d9Swdenk Define this if you have a DataFlash memory device which you 2772 5779d8d9Swdenk want to use for the environment. 2773 5779d8d9Swdenk 2774 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2775 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2776 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2777 5779d8d9Swdenk 2778 5779d8d9Swdenk These three #defines specify the offset and size of the 2779 5779d8d9Swdenk environment area within the total memory of your DataFlash placed 2780 5779d8d9Swdenk at the specified address. 2781 5779d8d9Swdenk 2782 51bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 2783 13a5695bSwdenk 2784 13a5695bSwdenk Define this if you have a NAND device which you want to use 2785 13a5695bSwdenk for the environment. 2786 13a5695bSwdenk 2787 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2788 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2789 13a5695bSwdenk 2790 13a5695bSwdenk These two #defines specify the offset and size of the environment 2791 fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 2792 fdd813deSScott Wood aligned to an erase block boundary. 2793 5779d8d9Swdenk 2794 fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 2795 e443c944SMarkus Klotzbuecher 2796 0e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2797 fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 2798 fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 2799 fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 2800 fdd813deSScott Wood aligned to an erase block boundary. 2801 e443c944SMarkus Klotzbuecher 2802 fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 2803 fdd813deSScott Wood 2804 fdd813deSScott Wood Specifies the length of the region in which the environment 2805 fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 2806 fdd813deSScott Wood block size. Specifying a range with more erase blocks than 2807 fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 2808 fdd813deSScott Wood the range to be avoided. 2809 fdd813deSScott Wood 2810 fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 2811 fdd813deSScott Wood 2812 fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 2813 fdd813deSScott Wood environment from block zero's out-of-band data. The 2814 fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 2815 fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 2816 fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 2817 e443c944SMarkus Klotzbuecher 2818 b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 2819 b74ab737SGuennadi Liakhovetski 2820 b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 2821 b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 2822 b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 2823 b74ab737SGuennadi Liakhovetski 2824 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 2825 c609719bSwdenk 2826 c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2827 c609719bSwdenk area is used at an early stage (ROM part) if the environment 2828 c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2829 c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2830 c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2831 c609719bSwdenk to be a good choice since it makes it far enough from the 2832 c609719bSwdenk start of the data area as well as from the stack pointer. 2833 c609719bSwdenk 2834 e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2835 c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2836 cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 2837 c609719bSwdenkuntil then to read environment variables. 2838 c609719bSwdenk 2839 85ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 2840 85ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 2841 85ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 2842 85ec0bccSwdenknecessary, because the first environment variable we need is the 2843 85ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 2844 85ec0bccSwdenkhave any device yet where we could complain.] 2845 c609719bSwdenk 2846 c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2847 c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 2848 85ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2849 c609719bSwdenk 2850 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 2851 fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2852 fc3e2165Swdenk 2853 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 2854 fc3e2165Swdenk also needs to be defined. 2855 fc3e2165Swdenk 2856 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 2857 fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2858 c609719bSwdenk 2859 f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 2860 f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 2861 f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 2862 f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 2863 f5675aa5SRon Madrid space for already greatly restricted images, including but not 2864 f5675aa5SRon Madrid limited to NAND_SPL configurations. 2865 f5675aa5SRon Madrid 2866 c609719bSwdenkLow Level (hardware related) configuration options: 2867 dc7c9a1aSwdenk--------------------------------------------------- 2868 c609719bSwdenk 2869 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 2870 c609719bSwdenk Cache Line Size of the CPU. 2871 c609719bSwdenk 2872 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 2873 c609719bSwdenk Default address of the IMMR after system reset. 2874 2535d602Swdenk 2875 2535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 2876 2535d602Swdenk and RPXsuper) to be able to adjust the position of 2877 2535d602Swdenk the IMMR register after a reset. 2878 c609719bSwdenk 2879 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 2880 e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 2881 e46fedfeSTimur Tabi PowerPC SOCs. 2882 e46fedfeSTimur Tabi 2883 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 2884 e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 2885 e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 2886 e46fedfeSTimur Tabi 2887 e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 2888 e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 2889 e46fedfeSTimur Tabi 2890 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 2891 e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 2892 e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 2893 e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 2894 e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 2895 e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 2896 e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 2897 e46fedfeSTimur Tabi 2898 e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 2899 e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 2900 e46fedfeSTimur Tabi 2901 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 2902 e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 2903 e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 2904 e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 2905 e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 2906 e46fedfeSTimur Tabi 2907 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 2908 e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 2909 e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 2910 e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 2911 e46fedfeSTimur Tabi 2912 e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 2913 e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 2914 e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 2915 e46fedfeSTimur Tabi 2916 7f6c2cbcSwdenk- Floppy Disk Support: 2917 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 2918 7f6c2cbcSwdenk 2919 7f6c2cbcSwdenk the default drive number (default value 0) 2920 7f6c2cbcSwdenk 2921 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 2922 7f6c2cbcSwdenk 2923 11ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 2924 7f6c2cbcSwdenk (default value 1) 2925 7f6c2cbcSwdenk 2926 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 2927 7f6c2cbcSwdenk 2928 7f6c2cbcSwdenk defines the offset of register from address. It 2929 7f6c2cbcSwdenk depends on which part of the data bus is connected to 2930 11ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 2931 7f6c2cbcSwdenk 2932 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 2933 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 2934 7f6c2cbcSwdenk default value. 2935 7f6c2cbcSwdenk 2936 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 2937 7f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 2938 7f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 2939 7f6c2cbcSwdenk source code. It is used to make hardware dependant 2940 7f6c2cbcSwdenk initializations. 2941 7f6c2cbcSwdenk 2942 0abddf82SMacpaul Lin- CONFIG_IDE_AHB: 2943 0abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 2944 0abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 2945 0abddf82SMacpaul Lin When software is doing ATA command and data transfer to 2946 0abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 2947 0abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 2948 0abddf82SMacpaul Lin is requierd. 2949 0abddf82SMacpaul Lin 2950 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 2951 25d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 2952 25d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2953 c609719bSwdenk 2954 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 2955 c609719bSwdenk 2956 7152b1d0Swdenk Start address of memory area that can be used for 2957 c609719bSwdenk initial data and stack; please note that this must be 2958 c609719bSwdenk writable memory that is working WITHOUT special 2959 c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2960 c609719bSwdenk will become available only after programming the 2961 c609719bSwdenk memory controller and running certain initialization 2962 c609719bSwdenk sequences. 2963 c609719bSwdenk 2964 c609719bSwdenk U-Boot uses the following memory types: 2965 c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2966 c609719bSwdenk - MPC824X: data cache 2967 c609719bSwdenk - PPC4xx: data cache 2968 c609719bSwdenk 2969 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 2970 c609719bSwdenk 2971 c609719bSwdenk Offset of the initial data structure in the memory 2972 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 2973 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 2974 c609719bSwdenk data is located at the end of the available space 2975 553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 2976 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 2977 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 2978 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 2979 c609719bSwdenk 2980 c609719bSwdenk Note: 2981 c609719bSwdenk On the MPC824X (or other systems that use the data 2982 c609719bSwdenk cache for initial memory) the address chosen for 2983 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 2984 c609719bSwdenk point to an otherwise UNUSED address space between 2985 c609719bSwdenk the top of RAM and the start of the PCI space. 2986 c609719bSwdenk 2987 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 2988 c609719bSwdenk 2989 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 2990 c609719bSwdenk 2991 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 2992 c609719bSwdenk 2993 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 2994 c609719bSwdenk 2995 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 2996 c609719bSwdenk 2997 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 2998 c609719bSwdenk 2999 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3000 c609719bSwdenk SDRAM timing 3001 c609719bSwdenk 3002 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3003 c609719bSwdenk periodic timer for refresh 3004 c609719bSwdenk 3005 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3006 c609719bSwdenk 3007 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 3008 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 3009 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 3010 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3011 c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3012 c609719bSwdenk 3013 c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 3014 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 3015 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3016 c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3017 c609719bSwdenk 3018 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 3019 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3020 c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3021 c609719bSwdenk Prescaler definitions (SDRAM timing) 3022 c609719bSwdenk 3023 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3024 c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3025 c609719bSwdenk define relocation offset in DPRAM [DSP2] 3026 c609719bSwdenk 3027 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3028 b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3029 b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3030 b423d055SHeiko Schocher 3031 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3032 c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3033 c609719bSwdenk define relocation offset in DPRAM [SCC4] 3034 c609719bSwdenk 3035 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3036 c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3037 c609719bSwdenk wrong setting might damage your board. Read 3038 c609719bSwdenk doc/README.MBX before setting this variable! 3039 c609719bSwdenk 3040 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3041 ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3042 ea909b76Swdenk (Power On Self Tests). This definition overrides 3043 ea909b76Swdenk #define'd default value in commproc.h resp. 3044 ea909b76Swdenk cpm_8260.h. 3045 ea909b76Swdenk 3046 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 3047 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 3048 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 3049 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 3050 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 3051 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 3052 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 3053 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3054 a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 3055 5d232d0eSwdenk 3056 9cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 3057 9cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 3058 9cacf4fcSDirk Eibach required. 3059 9cacf4fcSDirk Eibach 3060 a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3061 a09b9b68SKumar Gala Chip has SRIO or not 3062 a09b9b68SKumar Gala 3063 a09b9b68SKumar Gala- CONFIG_SRIO1: 3064 a09b9b68SKumar Gala Board has SRIO 1 port available 3065 a09b9b68SKumar Gala 3066 a09b9b68SKumar Gala- CONFIG_SRIO2: 3067 a09b9b68SKumar Gala Board has SRIO 2 port available 3068 a09b9b68SKumar Gala 3069 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3070 a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3071 a09b9b68SKumar Gala 3072 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3073 a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3074 a09b9b68SKumar Gala 3075 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3076 a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3077 a09b9b68SKumar Gala 3078 eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3079 eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3080 eced4626SAlex Waterman 16 bit bus. 3081 eced4626SAlex Waterman 3082 eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3083 eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3084 eced4626SAlex Waterman a default value will be used. 3085 eced4626SAlex Waterman 3086 bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3087 218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3088 218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3089 218ca724SWolfgang Denk 3090 bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3091 bb99ad6dSBen Warren I2C address of the SPD EEPROM 3092 bb99ad6dSBen Warren 3093 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3094 218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3095 218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3096 218ca724SWolfgang Denk to something your driver can deal with. 3097 bb99ad6dSBen Warren 3098 1b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 3099 1b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 3100 1b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 3101 1b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 3102 1b3e3c4fSYork Sun header files or board specific files. 3103 1b3e3c4fSYork Sun 3104 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3105 218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3106 218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 3107 2ad6b513STimur Tabi 3108 c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3109 c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3110 c26e454dSwdenk 3111 c26e454dSwdenk- CONFIG_FEC[12]_PHY 3112 c26e454dSwdenk Define to the hardcoded PHY address which corresponds 3113 6e592385Swdenk to the given FEC; i. e. 3114 c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3115 c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3116 c26e454dSwdenk 3117 c26e454dSwdenk When set to -1, means to probe for first available. 3118 c26e454dSwdenk 3119 c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3120 c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3121 c26e454dSwdenk (so program the FEC to ignore it). 3122 c26e454dSwdenk 3123 c26e454dSwdenk- CONFIG_RMII 3124 c26e454dSwdenk Enable RMII mode for all FECs. 3125 c26e454dSwdenk Note that this is a global option, we can't 3126 c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3127 c26e454dSwdenk 3128 5cf91d6bSwdenk- CONFIG_CRC32_VERIFY 3129 5cf91d6bSwdenk Add a verify option to the crc32 command. 3130 5cf91d6bSwdenk The syntax is: 3131 5cf91d6bSwdenk 3132 5cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 3133 5cf91d6bSwdenk 3134 5cf91d6bSwdenk Where address/count indicate a memory area 3135 5cf91d6bSwdenk and crc32 is the correct crc32 which the 3136 5cf91d6bSwdenk area should have. 3137 5cf91d6bSwdenk 3138 56523f12Swdenk- CONFIG_LOOPW 3139 56523f12Swdenk Add the "loopw" memory command. This only takes effect if 3140 602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 3141 56523f12Swdenk 3142 7b466641Sstroese- CONFIG_MX_CYCLIC 3143 7b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 3144 7b466641Sstroese "md/mw" commands. 3145 7b466641Sstroese Examples: 3146 7b466641Sstroese 3147 7b466641Sstroese => mdc.b 10 4 500 3148 7b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 3149 7b466641Sstroese 3150 7b466641Sstroese => mwc.l 100 12345678 10 3151 7b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 3152 7b466641Sstroese 3153 7b466641Sstroese This only takes effect if the memory commands are activated 3154 602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 3155 7b466641Sstroese 3156 8aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3157 92bbd64eSDaniel Schwierzeck [ARM, MIPS only] If this variable is defined, then certain 3158 e03f3169SWolfgang Denk low level initializations (like setting up the memory 3159 e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3160 e03f3169SWolfgang Denk relocate itself into RAM. 3161 8aa1a2d1Swdenk 3162 e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3163 e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3164 e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3165 e03f3169SWolfgang Denk these initializations itself. 3166 8aa1a2d1Swdenk 3167 401bb30bSAneesh V- CONFIG_SPL_BUILD 3168 df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3169 df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3170 df81238bSMagnus Lilja compiling a NAND SPL. 3171 400558b5Swdenk 3172 d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3173 d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3174 d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3175 d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3176 d8834a13SMatthias Weisser conditions but may increase the binary size. 3177 d8834a13SMatthias Weisser 3178 c609719bSwdenkBuilding the Software: 3179 c609719bSwdenk====================== 3180 c609719bSwdenk 3181 218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3182 218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3183 218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3184 218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3185 218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3186 218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3187 c609719bSwdenk 3188 218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3189 218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3190 218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3191 218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3192 218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3193 c609719bSwdenk 3194 218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3195 218ca724SWolfgang Denk $ export CROSS_COMPILE 3196 c609719bSwdenk 3197 2f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 3198 2f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 3199 2f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 3200 2f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 3201 2f8d396bSPeter Tyser 3202 2f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 3203 2f8d396bSPeter Tyser 3204 2f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 3205 2f8d396bSPeter Tyser be executed on computers running Windows. 3206 2f8d396bSPeter Tyser 3207 c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3208 c609719bSwdenksources you must configure U-Boot for one specific board type. This 3209 c609719bSwdenkis done by typing: 3210 c609719bSwdenk 3211 c609719bSwdenk make NAME_config 3212 c609719bSwdenk 3213 218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 3214 218ca724SWolfgang Denkrations; see the main Makefile for supported names. 3215 54387ac9Swdenk 3216 c609719bSwdenkNote: for some board special configuration names may exist; check if 3217 c609719bSwdenk additional information is available from the board vendor; for 3218 2729af9dSwdenk instance, the TQM823L systems are available without (standard) 3219 2729af9dSwdenk or with LCD support. You can select such additional "features" 3220 11ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3221 c609719bSwdenk 3222 2729af9dSwdenk make TQM823L_config 3223 2729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3224 c609719bSwdenk 3225 c609719bSwdenk make TQM823L_LCD_config 3226 c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3227 c609719bSwdenk 3228 c609719bSwdenk etc. 3229 c609719bSwdenk 3230 c609719bSwdenk 3231 c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 3232 7152b1d0Swdenkimages ready for download to / installation on your system: 3233 c609719bSwdenk 3234 c609719bSwdenk- "u-boot.bin" is a raw binary image 3235 c609719bSwdenk- "u-boot" is an image in ELF binary format 3236 c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3237 c609719bSwdenk 3238 baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3239 baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3240 baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3241 baf31249SMarian Balakowicz 3242 baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3243 baf31249SMarian Balakowicz 3244 baf31249SMarian Balakowicz make O=/tmp/build distclean 3245 baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3246 baf31249SMarian Balakowicz make O=/tmp/build all 3247 baf31249SMarian Balakowicz 3248 baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3249 baf31249SMarian Balakowicz 3250 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3251 baf31249SMarian Balakowicz make distclean 3252 baf31249SMarian Balakowicz make NAME_config 3253 baf31249SMarian Balakowicz make all 3254 baf31249SMarian Balakowicz 3255 baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3256 baf31249SMarian Balakowiczvariable. 3257 baf31249SMarian Balakowicz 3258 c609719bSwdenk 3259 c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3260 c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3261 c609719bSwdenknative "make". 3262 c609719bSwdenk 3263 c609719bSwdenk 3264 c609719bSwdenkIf the system board that you have is not listed, then you will need 3265 c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3266 c609719bSwdenksteps: 3267 c609719bSwdenk 3268 c609719bSwdenk1. Add a new configuration option for your board to the toplevel 3269 85ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 3270 85ec0bccSwdenk entries as examples. Note that here and at many other places 3271 7152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 3272 85ec0bccSwdenk keep this order. 3273 c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 3274 85ec0bccSwdenk files you need. In your board directory, you will need at least 3275 85ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 3276 85ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 3277 85ec0bccSwdenk your board 3278 c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3279 c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 3280 85ec0bccSwdenk4. Run "make <board>_config" with your new name. 3281 c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3282 c609719bSwdenk to be installed on your target system. 3283 85ec0bccSwdenk6. Debug and solve any problems that might arise. 3284 c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3285 c609719bSwdenk 3286 c609719bSwdenk 3287 c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3288 c609719bSwdenk============================================================== 3289 c609719bSwdenk 3290 c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3291 c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3292 c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3293 c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3294 218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3295 c609719bSwdenk 3296 c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3297 c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3298 c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3299 c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3300 c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 3301 7152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3302 218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3303 218ca724SWolfgang Denkyou can type 3304 c609719bSwdenk 3305 c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3306 c609719bSwdenk 3307 c609719bSwdenkor to build on a native PowerPC system you can type 3308 c609719bSwdenk 3309 c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3310 c609719bSwdenk 3311 218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3312 218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3313 218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3314 218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3315 218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3316 218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3317 218ca724SWolfgang Denkvariable. For example: 3318 baf31249SMarian Balakowicz 3319 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3320 baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3321 baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3322 baf31249SMarian Balakowicz 3323 218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3324 218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3325 218ca724SWolfgang Denkduring the whole build process. 3326 baf31249SMarian Balakowicz 3327 baf31249SMarian Balakowicz 3328 c609719bSwdenkSee also "U-Boot Porting Guide" below. 3329 c609719bSwdenk 3330 c609719bSwdenk 3331 c609719bSwdenkMonitor Commands - Overview: 3332 c609719bSwdenk============================ 3333 c609719bSwdenk 3334 c609719bSwdenkgo - start application at address 'addr' 3335 c609719bSwdenkrun - run commands in an environment variable 3336 c609719bSwdenkbootm - boot application image from memory 3337 c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3338 c609719bSwdenktftpboot- boot image via network using TFTP protocol 3339 c609719bSwdenk and env variables "ipaddr" and "serverip" 3340 c609719bSwdenk (and eventually "gatewayip") 3341 c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3342 c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3343 c609719bSwdenkloads - load S-Record file over serial line 3344 c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3345 c609719bSwdenkmd - memory display 3346 c609719bSwdenkmm - memory modify (auto-incrementing) 3347 c609719bSwdenknm - memory modify (constant address) 3348 c609719bSwdenkmw - memory write (fill) 3349 c609719bSwdenkcp - memory copy 3350 c609719bSwdenkcmp - memory compare 3351 c609719bSwdenkcrc32 - checksum calculation 3352 0f89c54bSPeter Tyseri2c - I2C sub-system 3353 c609719bSwdenksspi - SPI utility commands 3354 c609719bSwdenkbase - print or set address offset 3355 c609719bSwdenkprintenv- print environment variables 3356 c609719bSwdenksetenv - set environment variables 3357 c609719bSwdenksaveenv - save environment variables to persistent storage 3358 c609719bSwdenkprotect - enable or disable FLASH write protection 3359 c609719bSwdenkerase - erase FLASH memory 3360 c609719bSwdenkflinfo - print FLASH memory information 3361 c609719bSwdenkbdinfo - print Board Info structure 3362 c609719bSwdenkiminfo - print header information for application image 3363 c609719bSwdenkconinfo - print console devices and informations 3364 c609719bSwdenkide - IDE sub-system 3365 c609719bSwdenkloop - infinite loop on address range 3366 56523f12Swdenkloopw - infinite write loop on address range 3367 c609719bSwdenkmtest - simple RAM test 3368 c609719bSwdenkicache - enable or disable instruction cache 3369 c609719bSwdenkdcache - enable or disable data cache 3370 c609719bSwdenkreset - Perform RESET of the CPU 3371 c609719bSwdenkecho - echo args to console 3372 c609719bSwdenkversion - print monitor version 3373 c609719bSwdenkhelp - print online help 3374 c609719bSwdenk? - alias for 'help' 3375 c609719bSwdenk 3376 c609719bSwdenk 3377 c609719bSwdenkMonitor Commands - Detailed Description: 3378 c609719bSwdenk======================================== 3379 c609719bSwdenk 3380 c609719bSwdenkTODO. 3381 c609719bSwdenk 3382 c609719bSwdenkFor now: just type "help <command>". 3383 c609719bSwdenk 3384 c609719bSwdenk 3385 c609719bSwdenkEnvironment Variables: 3386 c609719bSwdenk====================== 3387 c609719bSwdenk 3388 c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3389 c609719bSwdenkcan be made persistent by saving to Flash memory. 3390 c609719bSwdenk 3391 c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3392 c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3393 c609719bSwdenkwithout a value can be used to delete a variable from the 3394 c609719bSwdenkenvironment. As long as you don't save the environment you are 3395 c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3396 c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3397 c609719bSwdenk 3398 c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3399 c96f86eeSWolfgang Denk 3400 c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3401 c609719bSwdenk 3402 c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3403 c609719bSwdenk 3404 c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3405 c609719bSwdenk 3406 c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3407 c609719bSwdenk 3408 c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3409 c609719bSwdenk 3410 c609719bSwdenk bootfile - Name of the image to load with TFTP 3411 c609719bSwdenk 3412 7d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 3413 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3414 7d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 3415 7d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 3416 7d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 3417 7d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3418 c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3419 c3624e6eSGrant Likely bootm_mapsize. 3420 c3624e6eSGrant Likely 3421 c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3422 c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3423 c3624e6eSGrant Likely defines the size of the memory region starting at base 3424 c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3425 c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3426 c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3427 c3624e6eSGrant Likely used otherwise. 3428 7d721e34SBartlomiej Sieka 3429 7d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 3430 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3431 7d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 3432 7d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 3433 7d721e34SBartlomiej Sieka environment variable. 3434 7d721e34SBartlomiej Sieka 3435 4bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 3436 4bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 3437 4bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 3438 4bae9090SBartlomiej Sieka 3439 c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3440 c609719bSwdenk "bootp" will just load perform a lookup of the 3441 c609719bSwdenk configuration from the BOOTP server, but not try to 3442 c609719bSwdenk load any image using TFTP 3443 c609719bSwdenk 3444 c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3445 c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3446 c609719bSwdenk be automatically started (by internally calling 3447 c609719bSwdenk "bootm") 3448 c609719bSwdenk 3449 4a6fd34bSwdenk If set to "no", a standalone image passed to the 3450 4a6fd34bSwdenk "bootm" command will be copied to the load address 3451 4a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 3452 4a6fd34bSwdenk This can be used to load and uncompress arbitrary 3453 4a6fd34bSwdenk data. 3454 4a6fd34bSwdenk 3455 a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3456 a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3457 a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3458 a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3459 a28afca5SDavid A. Long to work it must reside in writable memory, have 3460 a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3461 a28afca5SDavid A. Long add the information it needs into it, and the memory 3462 a28afca5SDavid A. Long must be accessible by the kernel. 3463 a28afca5SDavid A. Long 3464 17ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 3465 17ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 3466 17ea1177Swdenk mode (400kHZ). This environment variable is used in 3467 17ea1177Swdenk initialization code. So, for changes to be effective 3468 17ea1177Swdenk it must be saved and board must be reset. 3469 17ea1177Swdenk 3470 c609719bSwdenk initrd_high - restrict positioning of initrd images: 3471 c609719bSwdenk If this variable is not set, initrd images will be 3472 c609719bSwdenk copied to the highest possible address in RAM; this 3473 c609719bSwdenk is usually what you want since it allows for 3474 c609719bSwdenk maximum initrd size. If for some reason you want to 3475 c609719bSwdenk make sure that the initrd image is loaded below the 3476 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3477 c609719bSwdenk variable to a value of "no" or "off" or "0". 3478 c609719bSwdenk Alternatively, you can set it to a maximum upper 3479 c609719bSwdenk address to use (U-Boot will still check that it 3480 c609719bSwdenk does not overwrite the U-Boot stack and data). 3481 c609719bSwdenk 3482 c609719bSwdenk For instance, when you have a system with 16 MB 3483 7152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3484 c609719bSwdenk you can do this by adding "mem=12M" to the value of 3485 c609719bSwdenk the "bootargs" variable. However, now you must make 3486 7152b1d0Swdenk sure that the initrd image is placed in the first 3487 c609719bSwdenk 12 MB as well - this can be done with 3488 c609719bSwdenk 3489 c609719bSwdenk setenv initrd_high 00c00000 3490 c609719bSwdenk 3491 38b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 3492 38b99261Swdenk indication to U-Boot that all addresses are legal 3493 38b99261Swdenk for the Linux kernel, including addresses in flash 3494 38b99261Swdenk memory. In this case U-Boot will NOT COPY the 3495 38b99261Swdenk ramdisk at all. This may be useful to reduce the 3496 38b99261Swdenk boot time on your system, but requires that this 3497 38b99261Swdenk feature is supported by your Linux kernel. 3498 38b99261Swdenk 3499 c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3500 c609719bSwdenk 3501 c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3502 dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3503 c609719bSwdenk 3504 c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3505 c609719bSwdenk 3506 c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3507 c609719bSwdenk 3508 c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3509 c609719bSwdenk 3510 c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3511 c609719bSwdenk 3512 c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3513 c609719bSwdenk 3514 *e2a53458SMike Frysinger ethprime - controls which interface is used first. 3515 a3d991bdSwdenk 3516 *e2a53458SMike Frysinger ethact - controls which interface is currently active. 3517 *e2a53458SMike Frysinger For example you can do the following 3518 a3d991bdSwdenk 3519 48690d80SHeiko Schocher => setenv ethact FEC 3520 48690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 3521 48690d80SHeiko Schocher => setenv ethact SCC 3522 48690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3523 a3d991bdSwdenk 3524 e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3525 e1692577SMatthias Fuchs available network interfaces. 3526 e1692577SMatthias Fuchs It just stays at the currently selected interface. 3527 e1692577SMatthias Fuchs 3528 a3d991bdSwdenk netretry - When set to "no" each network operation will 3529 a3d991bdSwdenk either succeed or fail without retrying. 3530 6e592385Swdenk When set to "once" the network operation will 3531 6e592385Swdenk fail when all the available network interfaces 3532 6e592385Swdenk are tried once without success. 3533 a3d991bdSwdenk Useful on scripts which control the retry operation 3534 a3d991bdSwdenk themselves. 3535 a3d991bdSwdenk 3536 b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3537 a1cf027aSJean-Christophe PLAGNIOL-VILLARD 3538 28cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3539 ecb0ccd9SWolfgang Denk UDP source port. 3540 ecb0ccd9SWolfgang Denk 3541 28cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 3542 28cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 3543 28cb9375SWolfgang Denk 3544 c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3545 c96f86eeSWolfgang Denk we use the TFTP server's default block size 3546 c96f86eeSWolfgang Denk 3547 c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3548 c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3549 c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3550 c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3551 c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3552 c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3553 c96f86eeSWolfgang Denk with unreliable TFTP servers. 3554 c96f86eeSWolfgang Denk 3555 a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 3556 11ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3557 a3d991bdSwdenk VLAN tagged frames. 3558 c609719bSwdenk 3559 c609719bSwdenkThe following environment variables may be used and automatically 3560 c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3561 c609719bSwdenkdepending the information provided by your boot server: 3562 c609719bSwdenk 3563 c609719bSwdenk bootfile - see above 3564 c609719bSwdenk dnsip - IP address of your Domain Name Server 3565 fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3566 c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3567 c609719bSwdenk hostname - Target hostname 3568 c609719bSwdenk ipaddr - see above 3569 c609719bSwdenk netmask - Subnet Mask 3570 c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3571 c609719bSwdenk serverip - see above 3572 c609719bSwdenk 3573 c609719bSwdenk 3574 c609719bSwdenkThere are two special Environment Variables: 3575 c609719bSwdenk 3576 c609719bSwdenk serial# - contains hardware identification information such 3577 c609719bSwdenk as type string and/or serial number 3578 c609719bSwdenk ethaddr - Ethernet address 3579 c609719bSwdenk 3580 c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3581 c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3582 c609719bSwdenkonce they have been set once. 3583 c609719bSwdenk 3584 c609719bSwdenk 3585 c1551ea8SstroeseFurther special Environment Variables: 3586 c1551ea8Sstroese 3587 c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3588 c1551ea8Sstroese with the "version" command. This variable is 3589 c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3590 c1551ea8Sstroese 3591 c1551ea8Sstroese 3592 c609719bSwdenkPlease note that changes to some configuration parameters may take 3593 c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3594 c609719bSwdenk 3595 c609719bSwdenk 3596 f07771ccSwdenkCommand Line Parsing: 3597 f07771ccSwdenk===================== 3598 f07771ccSwdenk 3599 f07771ccSwdenkThere are two different command line parsers available with U-Boot: 3600 7152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3601 f07771ccSwdenk 3602 f07771ccSwdenkOld, simple command line parser: 3603 f07771ccSwdenk-------------------------------- 3604 f07771ccSwdenk 3605 f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3606 f07771ccSwdenk- several commands on one line, separated by ';' 3607 fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3608 f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3609 f07771ccSwdenk for example: 3610 fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3611 f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3612 f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3613 f07771ccSwdenk 3614 f07771ccSwdenkHush shell: 3615 f07771ccSwdenk----------- 3616 f07771ccSwdenk 3617 f07771ccSwdenk- similar to Bourne shell, with control structures like 3618 f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3619 f07771ccSwdenk until...do...done, ... 3620 f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3621 f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3622 f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3623 f07771ccSwdenk command 3624 f07771ccSwdenk 3625 f07771ccSwdenkGeneral rules: 3626 f07771ccSwdenk-------------- 3627 f07771ccSwdenk 3628 f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3629 f07771ccSwdenk command) contains several commands separated by semicolon, and 3630 f07771ccSwdenk one of these commands fails, then the remaining commands will be 3631 f07771ccSwdenk executed anyway. 3632 f07771ccSwdenk 3633 f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 3634 11ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3635 f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3636 f07771ccSwdenk variables are not executed. 3637 f07771ccSwdenk 3638 c609719bSwdenkNote for Redundant Ethernet Interfaces: 3639 c609719bSwdenk======================================= 3640 c609719bSwdenk 3641 11ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3642 c609719bSwdenksuch configurations and is capable of automatic selection of a 3643 7152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3644 c609719bSwdenk 3645 c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3646 c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3647 c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3648 c609719bSwdenk 3649 c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3650 c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3651 c609719bSwdenkding setting in the environment; if the corresponding environment 3652 c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3653 c609719bSwdenk 3654 c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3655 c609719bSwdenk environment, the SROM's address is used. 3656 c609719bSwdenk 3657 c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3658 c609719bSwdenk environment exists, then the value from the environment variable is 3659 c609719bSwdenk used. 3660 c609719bSwdenk 3661 c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3662 c609719bSwdenk both addresses are the same, this MAC address is used. 3663 c609719bSwdenk 3664 c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3665 c609719bSwdenk addresses differ, the value from the environment is used and a 3666 c609719bSwdenk warning is printed. 3667 c609719bSwdenk 3668 c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3669 c609719bSwdenk is raised. 3670 c609719bSwdenk 3671 ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 3672 ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 3673 ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 3674 ecee9324SBen WarrenThe naming convention is as follows: 3675 ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 3676 c609719bSwdenk 3677 c609719bSwdenkImage Formats: 3678 c609719bSwdenk============== 3679 c609719bSwdenk 3680 3310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 3681 3310c549SMarian Balakowiczimages in two formats: 3682 3310c549SMarian Balakowicz 3683 3310c549SMarian BalakowiczNew uImage format (FIT) 3684 3310c549SMarian Balakowicz----------------------- 3685 3310c549SMarian Balakowicz 3686 3310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 3687 3310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 3688 3310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 3689 3310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 3690 3310c549SMarian Balakowicz 3691 3310c549SMarian Balakowicz 3692 3310c549SMarian BalakowiczOld uImage format 3693 3310c549SMarian Balakowicz----------------- 3694 3310c549SMarian Balakowicz 3695 3310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 3696 3310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 3697 3310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3698 c609719bSwdenk 3699 c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3700 c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3701 f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3702 f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3703 f5ed9e39SPeter Tyser INTEGRITY). 3704 7b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 3705 1117cbf2SThomas Chou IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 3706 1117cbf2SThomas Chou Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC). 3707 c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3708 c609719bSwdenk* Load Address 3709 c609719bSwdenk* Entry Point 3710 c609719bSwdenk* Image Name 3711 c609719bSwdenk* Image Timestamp 3712 c609719bSwdenk 3713 c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3714 c609719bSwdenkand the data portions of the image are secured against corruption by 3715 c609719bSwdenkCRC32 checksums. 3716 c609719bSwdenk 3717 c609719bSwdenk 3718 c609719bSwdenkLinux Support: 3719 c609719bSwdenk============== 3720 c609719bSwdenk 3721 c609719bSwdenkAlthough U-Boot should support any OS or standalone application 3722 7152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3723 c609719bSwdenkU-Boot. 3724 c609719bSwdenk 3725 c609719bSwdenkU-Boot includes many features that so far have been part of some 3726 c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3727 c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3728 c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 3729 7152b1d0Swdenkserves several purposes: 3730 c609719bSwdenk 3731 c609719bSwdenk- the same features can be used for other OS or standalone 3732 c609719bSwdenk applications (for instance: using compressed images to reduce the 3733 c609719bSwdenk Flash memory footprint) 3734 c609719bSwdenk 3735 c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 3736 7152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 3737 c609719bSwdenk 3738 c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 3739 c609719bSwdenk images; of course this also means that different kernel images can 3740 c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 3741 c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 3742 c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3743 c609719bSwdenk software is easier now. 3744 c609719bSwdenk 3745 c609719bSwdenk 3746 c609719bSwdenkLinux HOWTO: 3747 c609719bSwdenk============ 3748 c609719bSwdenk 3749 c609719bSwdenkPorting Linux to U-Boot based systems: 3750 c609719bSwdenk--------------------------------------- 3751 c609719bSwdenk 3752 c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3753 c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3754 c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3755 c609719bSwdenkLinux :-). 3756 c609719bSwdenk 3757 a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 3758 c609719bSwdenk 3759 c609719bSwdenkJust make sure your machine specific header file (for instance 3760 c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 3761 1dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 3762 1dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 3763 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 3764 c609719bSwdenk 3765 c609719bSwdenk 3766 c609719bSwdenkConfiguring the Linux kernel: 3767 c609719bSwdenk----------------------------- 3768 c609719bSwdenk 3769 c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 3770 c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 3771 c609719bSwdenk 3772 c609719bSwdenk 3773 c609719bSwdenkBuilding a Linux Image: 3774 c609719bSwdenk----------------------- 3775 c609719bSwdenk 3776 24ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 3777 24ee89b9Swdenknot used. If you use recent kernel source, a new build target 3778 24ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 3779 24ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 3780 24ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 3781 24ee89b9Swdenk100% compatible format. 3782 c609719bSwdenk 3783 c609719bSwdenkExample: 3784 c609719bSwdenk 3785 c609719bSwdenk make TQM850L_config 3786 c609719bSwdenk make oldconfig 3787 c609719bSwdenk make dep 3788 24ee89b9Swdenk make uImage 3789 c609719bSwdenk 3790 24ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 3791 24ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 3792 24ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 3793 c609719bSwdenk 3794 24ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 3795 24ee89b9Swdenk 3796 24ee89b9Swdenk* convert the kernel into a raw binary image: 3797 24ee89b9Swdenk 3798 24ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 3799 24ee89b9Swdenk -R .note -R .comment \ 3800 24ee89b9Swdenk -S vmlinux linux.bin 3801 24ee89b9Swdenk 3802 24ee89b9Swdenk* compress the binary image: 3803 24ee89b9Swdenk 3804 24ee89b9Swdenk gzip -9 linux.bin 3805 24ee89b9Swdenk 3806 24ee89b9Swdenk* package compressed binary image for U-Boot: 3807 24ee89b9Swdenk 3808 24ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 3809 24ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 3810 24ee89b9Swdenk -d linux.bin.gz uImage 3811 24ee89b9Swdenk 3812 24ee89b9Swdenk 3813 24ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 3814 24ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 3815 24ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 3816 24ee89b9Swdenkbyte header containing information about target architecture, 3817 24ee89b9Swdenkoperating system, image type, compression method, entry points, time 3818 24ee89b9Swdenkstamp, CRC32 checksums, etc. 3819 24ee89b9Swdenk 3820 24ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 3821 24ee89b9Swdenkprint the header information, or to build new images. 3822 c609719bSwdenk 3823 c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 3824 c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 3825 c609719bSwdenkchecksum verification: 3826 c609719bSwdenk 3827 c609719bSwdenk tools/mkimage -l image 3828 c609719bSwdenk -l ==> list image header information 3829 c609719bSwdenk 3830 c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 3831 c609719bSwdenkfrom a "data file" which is used as image payload: 3832 c609719bSwdenk 3833 c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 3834 c609719bSwdenk -n name -d data_file image 3835 c609719bSwdenk -A ==> set architecture to 'arch' 3836 c609719bSwdenk -O ==> set operating system to 'os' 3837 c609719bSwdenk -T ==> set image type to 'type' 3838 c609719bSwdenk -C ==> set compression type 'comp' 3839 c609719bSwdenk -a ==> set load address to 'addr' (hex) 3840 c609719bSwdenk -e ==> set entry point to 'ep' (hex) 3841 c609719bSwdenk -n ==> set image name to 'name' 3842 c609719bSwdenk -d ==> use image data from 'datafile' 3843 c609719bSwdenk 3844 69459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 3845 69459791Swdenkaddress (0x00000000), but the entry point address depends on the 3846 69459791Swdenkkernel version: 3847 c609719bSwdenk 3848 c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 3849 24ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 3850 c609719bSwdenk 3851 c609719bSwdenkSo a typical call to build a U-Boot image would read: 3852 c609719bSwdenk 3853 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 3854 24ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 3855 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 3856 24ee89b9Swdenk > examples/uImage.TQM850L 3857 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3858 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3859 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3860 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3861 c609719bSwdenk Load Address: 0x00000000 3862 24ee89b9Swdenk Entry Point: 0x00000000 3863 c609719bSwdenk 3864 c609719bSwdenkTo verify the contents of the image (or check for corruption): 3865 c609719bSwdenk 3866 24ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 3867 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3868 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3869 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3870 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3871 c609719bSwdenk Load Address: 0x00000000 3872 24ee89b9Swdenk Entry Point: 0x00000000 3873 c609719bSwdenk 3874 c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 3875 c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3876 c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3877 c609719bSwdenkneed to be uncompressed: 3878 c609719bSwdenk 3879 a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 3880 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 3881 24ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 3882 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 3883 24ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 3884 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3885 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3886 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3887 c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3888 c609719bSwdenk Load Address: 0x00000000 3889 24ee89b9Swdenk Entry Point: 0x00000000 3890 c609719bSwdenk 3891 c609719bSwdenk 3892 c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3893 c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3894 c609719bSwdenk 3895 c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3896 c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3897 c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3898 c609719bSwdenk Image Name: Simple Ramdisk Image 3899 c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3900 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3901 c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3902 c609719bSwdenk Load Address: 0x00000000 3903 c609719bSwdenk Entry Point: 0x00000000 3904 c609719bSwdenk 3905 c609719bSwdenk 3906 c609719bSwdenkInstalling a Linux Image: 3907 c609719bSwdenk------------------------- 3908 c609719bSwdenk 3909 c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3910 c609719bSwdenkyou must convert the image to S-Record format: 3911 c609719bSwdenk 3912 c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3913 c609719bSwdenk 3914 c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3915 c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3916 c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3917 c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3918 c609719bSwdenkcommand. 3919 c609719bSwdenk 3920 c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3921 c609719bSwdenkTQM8xxL is in the first Flash bank): 3922 c609719bSwdenk 3923 c609719bSwdenk => erase 40100000 401FFFFF 3924 c609719bSwdenk 3925 c609719bSwdenk .......... done 3926 c609719bSwdenk Erased 8 sectors 3927 c609719bSwdenk 3928 c609719bSwdenk => loads 40100000 3929 c609719bSwdenk ## Ready for S-Record download ... 3930 c609719bSwdenk ~>examples/image.srec 3931 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3932 c609719bSwdenk ... 3933 c609719bSwdenk 15989 15990 15991 15992 3934 c609719bSwdenk [file transfer complete] 3935 c609719bSwdenk [connected] 3936 c609719bSwdenk ## Start Addr = 0x00000000 3937 c609719bSwdenk 3938 c609719bSwdenk 3939 c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3940 c609719bSwdenkthis includes a checksum verification so you can be sure no data 3941 c609719bSwdenkcorruption happened: 3942 c609719bSwdenk 3943 c609719bSwdenk => imi 40100000 3944 c609719bSwdenk 3945 c609719bSwdenk ## Checking Image at 40100000 ... 3946 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3947 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3948 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3949 c609719bSwdenk Load Address: 00000000 3950 c609719bSwdenk Entry Point: 0000000c 3951 c609719bSwdenk Verifying Checksum ... OK 3952 c609719bSwdenk 3953 c609719bSwdenk 3954 c609719bSwdenkBoot Linux: 3955 c609719bSwdenk----------- 3956 c609719bSwdenk 3957 c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 3958 c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 3959 c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 3960 c609719bSwdenkparameters. You can check and modify this variable using the 3961 c609719bSwdenk"printenv" and "setenv" commands: 3962 c609719bSwdenk 3963 c609719bSwdenk 3964 c609719bSwdenk => printenv bootargs 3965 c609719bSwdenk bootargs=root=/dev/ram 3966 c609719bSwdenk 3967 c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3968 c609719bSwdenk 3969 c609719bSwdenk => printenv bootargs 3970 c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3971 c609719bSwdenk 3972 c609719bSwdenk => bootm 40020000 3973 c609719bSwdenk ## Booting Linux kernel at 40020000 ... 3974 c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 3975 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3976 c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 3977 c609719bSwdenk Load Address: 00000000 3978 c609719bSwdenk Entry Point: 0000000c 3979 c609719bSwdenk Verifying Checksum ... OK 3980 c609719bSwdenk Uncompressing Kernel Image ... OK 3981 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 3982 c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3983 c609719bSwdenk time_init: decrementer frequency = 187500000/60 3984 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3985 c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 3986 c609719bSwdenk ... 3987 c609719bSwdenk 3988 11ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 3989 7152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 3990 c609719bSwdenkformat!) to the "bootm" command: 3991 c609719bSwdenk 3992 c609719bSwdenk => imi 40100000 40200000 3993 c609719bSwdenk 3994 c609719bSwdenk ## Checking Image at 40100000 ... 3995 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3996 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3997 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3998 c609719bSwdenk Load Address: 00000000 3999 c609719bSwdenk Entry Point: 0000000c 4000 c609719bSwdenk Verifying Checksum ... OK 4001 c609719bSwdenk 4002 c609719bSwdenk ## Checking Image at 40200000 ... 4003 c609719bSwdenk Image Name: Simple Ramdisk Image 4004 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4005 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4006 c609719bSwdenk Load Address: 00000000 4007 c609719bSwdenk Entry Point: 00000000 4008 c609719bSwdenk Verifying Checksum ... OK 4009 c609719bSwdenk 4010 c609719bSwdenk => bootm 40100000 40200000 4011 c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4012 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4013 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4014 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4015 c609719bSwdenk Load Address: 00000000 4016 c609719bSwdenk Entry Point: 0000000c 4017 c609719bSwdenk Verifying Checksum ... OK 4018 c609719bSwdenk Uncompressing Kernel Image ... OK 4019 c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4020 c609719bSwdenk Image Name: Simple Ramdisk Image 4021 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4022 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4023 c609719bSwdenk Load Address: 00000000 4024 c609719bSwdenk Entry Point: 00000000 4025 c609719bSwdenk Verifying Checksum ... OK 4026 c609719bSwdenk Loading Ramdisk ... OK 4027 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 4028 c609719bSwdenk Boot arguments: root=/dev/ram 4029 c609719bSwdenk time_init: decrementer frequency = 187500000/60 4030 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4031 c609719bSwdenk ... 4032 c609719bSwdenk RAMDISK: Compressed image found at block 0 4033 c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4034 c609719bSwdenk 4035 c609719bSwdenk bash# 4036 c609719bSwdenk 4037 0267768eSMatthew McClintockBoot Linux and pass a flat device tree: 4038 0267768eSMatthew McClintock----------- 4039 0267768eSMatthew McClintock 4040 0267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 4041 0267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 4042 0267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 4043 0267768eSMatthew McClintockflat device tree: 4044 0267768eSMatthew McClintock 4045 0267768eSMatthew McClintock=> print oftaddr 4046 0267768eSMatthew McClintockoftaddr=0x300000 4047 0267768eSMatthew McClintock=> print oft 4048 0267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 4049 0267768eSMatthew McClintock=> tftp $oftaddr $oft 4050 0267768eSMatthew McClintockSpeed: 1000, full duplex 4051 0267768eSMatthew McClintockUsing TSEC0 device 4052 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 4053 0267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 4054 0267768eSMatthew McClintockLoad address: 0x300000 4055 0267768eSMatthew McClintockLoading: # 4056 0267768eSMatthew McClintockdone 4057 0267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 4058 0267768eSMatthew McClintock=> tftp $loadaddr $bootfile 4059 0267768eSMatthew McClintockSpeed: 1000, full duplex 4060 0267768eSMatthew McClintockUsing TSEC0 device 4061 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 4062 0267768eSMatthew McClintockFilename 'uImage'. 4063 0267768eSMatthew McClintockLoad address: 0x200000 4064 0267768eSMatthew McClintockLoading:############ 4065 0267768eSMatthew McClintockdone 4066 0267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 4067 0267768eSMatthew McClintock=> print loadaddr 4068 0267768eSMatthew McClintockloadaddr=200000 4069 0267768eSMatthew McClintock=> print oftaddr 4070 0267768eSMatthew McClintockoftaddr=0x300000 4071 0267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 4072 0267768eSMatthew McClintock## Booting image at 00200000 ... 4073 0267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 4074 0267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 4075 0267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 4076 0267768eSMatthew McClintock Load Address: 00000000 4077 0267768eSMatthew McClintock Entry Point: 00000000 4078 0267768eSMatthew McClintock Verifying Checksum ... OK 4079 0267768eSMatthew McClintock Uncompressing Kernel Image ... OK 4080 0267768eSMatthew McClintockBooting using flat device tree at 0x300000 4081 0267768eSMatthew McClintockUsing MPC85xx ADS machine description 4082 0267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 4083 0267768eSMatthew McClintock[snip] 4084 0267768eSMatthew McClintock 4085 0267768eSMatthew McClintock 4086 6069ff26SwdenkMore About U-Boot Image Types: 4087 6069ff26Swdenk------------------------------ 4088 6069ff26Swdenk 4089 6069ff26SwdenkU-Boot supports the following image types: 4090 6069ff26Swdenk 4091 6069ff26Swdenk "Standalone Programs" are directly runnable in the environment 4092 6069ff26Swdenk provided by U-Boot; it is expected that (if they behave 4093 6069ff26Swdenk well) you can continue to work in U-Boot after return from 4094 6069ff26Swdenk the Standalone Program. 4095 6069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 4096 6069ff26Swdenk will take over control completely. Usually these programs 4097 6069ff26Swdenk will install their own set of exception handlers, device 4098 6069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 4099 6069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 4100 6069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 4101 6069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 4102 6069ff26Swdenk being started. 4103 6069ff26Swdenk "Multi-File Images" contain several images, typically an OS 4104 6069ff26Swdenk (Linux) kernel image and one or more data images like 4105 6069ff26Swdenk RAMDisks. This construct is useful for instance when you want 4106 6069ff26Swdenk to boot over the network using BOOTP etc., where the boot 4107 6069ff26Swdenk server provides just a single image file, but you want to get 4108 6069ff26Swdenk for instance an OS kernel and a RAMDisk image. 4109 6069ff26Swdenk 4110 6069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 4111 6069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 4112 6069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 4113 6069ff26Swdenk Immediately after the terminating 0 follow the images, one by 4114 6069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 4115 6069ff26Swdenk a multiple of 4 bytes). 4116 6069ff26Swdenk 4117 6069ff26Swdenk "Firmware Images" are binary images containing firmware (like 4118 6069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 4119 6069ff26Swdenk flash memory. 4120 6069ff26Swdenk 4121 6069ff26Swdenk "Script files" are command sequences that will be executed by 4122 6069ff26Swdenk U-Boot's command interpreter; this feature is especially 4123 6069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 4124 6069ff26Swdenk as command interpreter. 4125 6069ff26Swdenk 4126 c609719bSwdenk 4127 c609719bSwdenkStandalone HOWTO: 4128 c609719bSwdenk================= 4129 c609719bSwdenk 4130 c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4131 c609719bSwdenkrun "standalone" applications, which can use some resources of 4132 c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4133 c609719bSwdenk 4134 c609719bSwdenkTwo simple examples are included with the sources: 4135 c609719bSwdenk 4136 c609719bSwdenk"Hello World" Demo: 4137 c609719bSwdenk------------------- 4138 c609719bSwdenk 4139 c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4140 c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4141 c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4142 c609719bSwdenklike that: 4143 c609719bSwdenk 4144 c609719bSwdenk => loads 4145 c609719bSwdenk ## Ready for S-Record download ... 4146 c609719bSwdenk ~>examples/hello_world.srec 4147 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4148 c609719bSwdenk [file transfer complete] 4149 c609719bSwdenk [connected] 4150 c609719bSwdenk ## Start Addr = 0x00040004 4151 c609719bSwdenk 4152 c609719bSwdenk => go 40004 Hello World! This is a test. 4153 c609719bSwdenk ## Starting application at 0x00040004 ... 4154 c609719bSwdenk Hello World 4155 c609719bSwdenk argc = 7 4156 c609719bSwdenk argv[0] = "40004" 4157 c609719bSwdenk argv[1] = "Hello" 4158 c609719bSwdenk argv[2] = "World!" 4159 c609719bSwdenk argv[3] = "This" 4160 c609719bSwdenk argv[4] = "is" 4161 c609719bSwdenk argv[5] = "a" 4162 c609719bSwdenk argv[6] = "test." 4163 c609719bSwdenk argv[7] = "<NULL>" 4164 c609719bSwdenk Hit any key to exit ... 4165 c609719bSwdenk 4166 c609719bSwdenk ## Application terminated, rc = 0x0 4167 c609719bSwdenk 4168 c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4169 c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4170 c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4171 c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4172 c609719bSwdenkcharacter, but this is just a demo program. The application can be 4173 c609719bSwdenkcontrolled by the following keys: 4174 c609719bSwdenk 4175 c609719bSwdenk ? - print current values og the CPM Timer registers 4176 c609719bSwdenk b - enable interrupts and start timer 4177 c609719bSwdenk e - stop timer and disable interrupts 4178 c609719bSwdenk q - quit application 4179 c609719bSwdenk 4180 c609719bSwdenk => loads 4181 c609719bSwdenk ## Ready for S-Record download ... 4182 c609719bSwdenk ~>examples/timer.srec 4183 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4184 c609719bSwdenk [file transfer complete] 4185 c609719bSwdenk [connected] 4186 c609719bSwdenk ## Start Addr = 0x00040004 4187 c609719bSwdenk 4188 c609719bSwdenk => go 40004 4189 c609719bSwdenk ## Starting application at 0x00040004 ... 4190 c609719bSwdenk TIMERS=0xfff00980 4191 c609719bSwdenk Using timer 1 4192 c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4193 c609719bSwdenk 4194 c609719bSwdenkHit 'b': 4195 c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4196 c609719bSwdenk Enabling timer 4197 c609719bSwdenkHit '?': 4198 c609719bSwdenk [q, b, e, ?] ........ 4199 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4200 c609719bSwdenkHit '?': 4201 c609719bSwdenk [q, b, e, ?] . 4202 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4203 c609719bSwdenkHit '?': 4204 c609719bSwdenk [q, b, e, ?] . 4205 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4206 c609719bSwdenkHit '?': 4207 c609719bSwdenk [q, b, e, ?] . 4208 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4209 c609719bSwdenkHit 'e': 4210 c609719bSwdenk [q, b, e, ?] ...Stopping timer 4211 c609719bSwdenkHit 'q': 4212 c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4213 c609719bSwdenk 4214 c609719bSwdenk 4215 85ec0bccSwdenkMinicom warning: 4216 85ec0bccSwdenk================ 4217 85ec0bccSwdenk 4218 7152b1d0SwdenkOver time, many people have reported problems when trying to use the 4219 85ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 4220 85ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4221 f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 4222 85ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4223 85ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 4224 85ec0bccSwdenk 4225 52f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 4226 52f52c14Swdenkconfiguration to your "File transfer protocols" section: 4227 52f52c14Swdenk 4228 52f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 4229 52f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 4230 52f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 4231 52f52c14Swdenk 4232 52f52c14Swdenk 4233 c609719bSwdenkNetBSD Notes: 4234 c609719bSwdenk============= 4235 c609719bSwdenk 4236 c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4237 c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4238 c609719bSwdenk 4239 c609719bSwdenkBuilding requires a cross environment; it is known to work on 4240 c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4241 c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4242 c609719bSwdenkNote that the cross-powerpc package does not install include files; 4243 c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4244 c609719bSwdenkmissing. This file has to be installed and patched manually: 4245 c609719bSwdenk 4246 c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4247 c609719bSwdenk # mkdir powerpc 4248 c609719bSwdenk # ln -s powerpc machine 4249 c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4250 c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4251 c609719bSwdenk 4252 c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4253 c609719bSwdenkand U-Boot include files. 4254 c609719bSwdenk 4255 c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4256 c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4257 c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4258 c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 4259 2a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4260 c609719bSwdenk 4261 c609719bSwdenk 4262 c609719bSwdenkImplementation Internals: 4263 c609719bSwdenk========================= 4264 c609719bSwdenk 4265 c609719bSwdenkThe following is not intended to be a complete description of every 4266 c609719bSwdenkimplementation detail. However, it should help to understand the 4267 c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4268 c609719bSwdenkhardware. 4269 c609719bSwdenk 4270 c609719bSwdenk 4271 c609719bSwdenkInitial Stack, Global Data: 4272 c609719bSwdenk--------------------------- 4273 c609719bSwdenk 4274 c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4275 c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4276 c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4277 c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4278 c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4279 c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4280 c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4281 c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4282 c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4283 c609719bSwdenklocked as (mis-) used as memory, etc. 4284 c609719bSwdenk 4285 7152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 4286 0668236bSWolfgang Denk U-Boot mailing list: 4287 43d9616cSwdenk 4288 43d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 4289 43d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 4290 43d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 4291 43d9616cSwdenk ... 4292 43d9616cSwdenk 4293 43d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 4294 43d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 4295 43d9616cSwdenk require any physical RAM backing up the cache. The cleverness 4296 43d9616cSwdenk is that the cache is being used as a temporary supply of 4297 43d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 4298 11ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 4299 43d9616cSwdenk can see how this works by studying the cache architecture and 4300 43d9616cSwdenk operation in the architecture and processor-specific manuals. 4301 43d9616cSwdenk 4302 43d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 4303 43d9616cSwdenk is another option for the system designer to use as an 4304 11ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 4305 43d9616cSwdenk option should work for you. Using CS 4 should be fine if your 4306 43d9616cSwdenk board designers haven't used it for something that would 4307 43d9616cSwdenk cause you grief during the initial boot! It is frequently not 4308 43d9616cSwdenk used. 4309 43d9616cSwdenk 4310 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 4311 43d9616cSwdenk with your processor/board/system design. The default value 4312 43d9616cSwdenk you will find in any recent u-boot distribution in 4313 8a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 4314 43d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 4315 43d9616cSwdenk it above 400_0000. Just make sure your board has no resources 4316 43d9616cSwdenk that are supposed to respond to that address! That code in 4317 43d9616cSwdenk start.S has been around a while and should work as is when 4318 43d9616cSwdenk you get the config right. 4319 43d9616cSwdenk 4320 43d9616cSwdenk -Chris Hallinan 4321 43d9616cSwdenk DS4.COM, Inc. 4322 43d9616cSwdenk 4323 c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4324 c609719bSwdenkcode for the initialization procedures: 4325 c609719bSwdenk 4326 c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4327 c609719bSwdenk to write it. 4328 c609719bSwdenk 4329 11ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4330 c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 4331 7152b1d0Swdenk zation is performed later (when relocating to RAM). 4332 c609719bSwdenk 4333 c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4334 c609719bSwdenk that. 4335 c609719bSwdenk 4336 c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4337 c609719bSwdenknormal global data to share information beween the code. But it 4338 c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4339 c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4340 c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4341 c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4342 c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4343 c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4344 c609719bSwdenkreserve for this purpose. 4345 c609719bSwdenk 4346 7152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4347 c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4348 c609719bSwdenkGCC's implementation. 4349 c609719bSwdenk 4350 c609719bSwdenkFor PowerPC, the following registers have specific use: 4351 c609719bSwdenk R1: stack pointer 4352 e7670f6cSWolfgang Denk R2: reserved for system use 4353 c609719bSwdenk R3-R4: parameter passing and return values 4354 c609719bSwdenk R5-R10: parameter passing 4355 c609719bSwdenk R13: small data area pointer 4356 c609719bSwdenk R30: GOT pointer 4357 c609719bSwdenk R31: frame pointer 4358 c609719bSwdenk 4359 e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4360 e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4361 e6bee808SJoakim Tjernlund going back and forth between asm and C) 4362 c609719bSwdenk 4363 e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4364 c609719bSwdenk 4365 c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4366 c609719bSwdenk address of the global data structure is known at compile time), 4367 c609719bSwdenk but it turned out that reserving a register results in somewhat 4368 c609719bSwdenk smaller code - although the code savings are not that big (on 4369 c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4370 c609719bSwdenk 624 text + 127 data). 4371 c609719bSwdenk 4372 c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 4373 4c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 4374 4c58eb55SMike Frysinger 4375 c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 4376 4c58eb55SMike Frysinger 4377 c609719bSwdenkOn ARM, the following registers are used: 4378 c609719bSwdenk 4379 c609719bSwdenk R0: function argument word/integer result 4380 c609719bSwdenk R1-R3: function argument word 4381 c609719bSwdenk R9: GOT pointer 4382 c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4383 c609719bSwdenk R11: argument (frame) pointer 4384 c609719bSwdenk R12: temporary workspace 4385 c609719bSwdenk R13: stack pointer 4386 c609719bSwdenk R14: link register 4387 c609719bSwdenk R15: program counter 4388 c609719bSwdenk 4389 c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4390 c609719bSwdenk 4391 0df01fd3SThomas ChouOn Nios II, the ABI is documented here: 4392 0df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 4393 0df01fd3SThomas Chou 4394 0df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 4395 0df01fd3SThomas Chou 4396 0df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 4397 0df01fd3SThomas Chou to access small data sections, so gp is free. 4398 0df01fd3SThomas Chou 4399 d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4400 d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4401 c609719bSwdenk 4402 c609719bSwdenkMemory Management: 4403 c609719bSwdenk------------------ 4404 c609719bSwdenk 4405 c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4406 c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4407 c609719bSwdenk 4408 c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4409 c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4410 c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4411 c609719bSwdenkphysical memory banks. 4412 c609719bSwdenk 4413 c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4414 c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4415 c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4416 c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 4417 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4418 c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4419 c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4420 c609719bSwdenk 4421 c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4422 c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4423 c609719bSwdenk 4424 c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4425 c609719bSwdenkthis: 4426 c609719bSwdenk 4427 c609719bSwdenk 0x0000 0000 Exception Vector code 4428 c609719bSwdenk : 4429 c609719bSwdenk 0x0000 1FFF 4430 c609719bSwdenk 0x0000 2000 Free for Application Use 4431 c609719bSwdenk : 4432 c609719bSwdenk : 4433 c609719bSwdenk 4434 c609719bSwdenk : 4435 c609719bSwdenk : 4436 c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4437 c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4438 c609719bSwdenk 0x00FC 0000 Malloc Arena 4439 c609719bSwdenk : 4440 c609719bSwdenk 0x00FD FFFF 4441 c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4442 c609719bSwdenk ... eventually: LCD or video framebuffer 4443 c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4444 c609719bSwdenk 0x00FF FFFF [End of RAM] 4445 c609719bSwdenk 4446 c609719bSwdenk 4447 c609719bSwdenkSystem Initialization: 4448 c609719bSwdenk---------------------- 4449 c609719bSwdenk 4450 c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 4451 11ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4452 c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 4453 7152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4454 c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4455 c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4456 c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4457 c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4458 c609719bSwdenkthe caches and the SIU. 4459 c609719bSwdenk 4460 c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4461 c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4462 c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4463 c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4464 c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4465 c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4466 c609719bSwdenkbanks. 4467 c609719bSwdenk 4468 c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 4469 7152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4470 c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4471 c609719bSwdenk0x00000000, with any additional banks following immediately to create 4472 c609719bSwdenkcontiguous memory starting from 0. 4473 c609719bSwdenk 4474 c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4475 c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4476 c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4477 c609719bSwdenkpages, and the final stack is set up. 4478 c609719bSwdenk 4479 c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4480 c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4481 c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4482 c609719bSwdenknew address in RAM. 4483 c609719bSwdenk 4484 c609719bSwdenk 4485 c609719bSwdenkU-Boot Porting Guide: 4486 c609719bSwdenk---------------------- 4487 c609719bSwdenk 4488 c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 4489 6aff3115Swdenklist, October 2002] 4490 c609719bSwdenk 4491 c609719bSwdenk 4492 c609719bSwdenkint main(int argc, char *argv[]) 4493 c609719bSwdenk{ 4494 c609719bSwdenk sighandler_t no_more_time; 4495 c609719bSwdenk 4496 c609719bSwdenk signal(SIGALRM, no_more_time); 4497 c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4498 c609719bSwdenk 4499 c609719bSwdenk if (available_money > available_manpower) { 4500 6c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4501 c609719bSwdenk return 0; 4502 c609719bSwdenk } 4503 c609719bSwdenk 4504 c609719bSwdenk Download latest U-Boot source; 4505 c609719bSwdenk 4506 0668236bSWolfgang Denk Subscribe to u-boot mailing list; 4507 6aff3115Swdenk 4508 6c3fef28SJerry Van Baren if (clueless) 4509 c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4510 c609719bSwdenk 4511 c609719bSwdenk while (learning) { 4512 c609719bSwdenk Read the README file in the top level directory; 4513 7cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 4514 6c3fef28SJerry Van Baren Read applicable doc/*.README; 4515 c609719bSwdenk Read the source, Luke; 4516 6c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4517 c609719bSwdenk } 4518 c609719bSwdenk 4519 6c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 4520 6c3fef28SJerry Van Baren Buy a BDI3000; 4521 6c3fef28SJerry Van Baren else 4522 c609719bSwdenk Add a lot of aggravation and time; 4523 c609719bSwdenk 4524 6c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 4525 6c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 4526 6c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 4527 6c3fef28SJerry Van Baren } else { 4528 c609719bSwdenk Create your own board support subdirectory; 4529 6c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 4530 6c3fef28SJerry Van Baren } 4531 6c3fef28SJerry Van Baren Edit new board/<myboard> files 4532 6c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4533 c609719bSwdenk 4534 6c3fef28SJerry Van Baren while (!accepted) { 4535 c609719bSwdenk while (!running) { 4536 c609719bSwdenk do { 4537 c609719bSwdenk Add / modify source code; 4538 c609719bSwdenk } until (compiles); 4539 c609719bSwdenk Debug; 4540 c609719bSwdenk if (clueless) 4541 c609719bSwdenk email("Hi, I am having problems..."); 4542 c609719bSwdenk } 4543 6c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 4544 6c3fef28SJerry Van Baren if (reasonable critiques) 4545 6c3fef28SJerry Van Baren Incorporate improvements from email list code review; 4546 6c3fef28SJerry Van Baren else 4547 6c3fef28SJerry Van Baren Defend code as written; 4548 6c3fef28SJerry Van Baren } 4549 c609719bSwdenk 4550 c609719bSwdenk return 0; 4551 c609719bSwdenk} 4552 c609719bSwdenk 4553 c609719bSwdenkvoid no_more_time (int sig) 4554 c609719bSwdenk{ 4555 c609719bSwdenk hire_a_guru(); 4556 c609719bSwdenk} 4557 c609719bSwdenk 4558 c609719bSwdenk 4559 c609719bSwdenkCoding Standards: 4560 c609719bSwdenk----------------- 4561 c609719bSwdenk 4562 c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 4563 2c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 4564 7ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 4565 c609719bSwdenk 4566 2c051651SDetlev ZundelSource files originating from a different project (for example the 4567 2c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 4568 2c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 4569 2c051651SDetlev Zundelsources. 4570 2c051651SDetlev Zundel 4571 2c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 4572 2c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 4573 2c051651SDetlev Zundelin your code. 4574 c609719bSwdenk 4575 c178d3daSwdenkPlease also stick to the following formatting rules: 4576 180d3f74Swdenk- remove any trailing white space 4577 7ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 4578 180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 4579 7ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 4580 180d3f74Swdenk- do not add trailing empty lines to source files 4581 180d3f74Swdenk 4582 c609719bSwdenkSubmissions which do not conform to the standards may be returned 4583 c609719bSwdenkwith a request to reformat the changes. 4584 c609719bSwdenk 4585 c609719bSwdenk 4586 c609719bSwdenkSubmitting Patches: 4587 c609719bSwdenk------------------- 4588 c609719bSwdenk 4589 c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4590 c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4591 c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4592 c609719bSwdenk 4593 0d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4594 218ca724SWolfgang Denk 4595 0668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 4596 0668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 4597 0668236bSWolfgang Denk 4598 c609719bSwdenkWhen you send a patch, please include the following information with 4599 c609719bSwdenkit: 4600 c609719bSwdenk 4601 c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4602 c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4603 c609719bSwdenk patch actually fixes something. 4604 c609719bSwdenk 4605 c609719bSwdenk* For new features: a description of the feature and your 4606 c609719bSwdenk implementation. 4607 c609719bSwdenk 4608 c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4609 c609719bSwdenk 4610 c609719bSwdenk* For major contributions, your entry to the CREDITS file 4611 c609719bSwdenk 4612 c609719bSwdenk* When you add support for a new board, don't forget to add this 4613 7ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 4614 c609719bSwdenk 4615 c609719bSwdenk* If your patch adds new configuration options, don't forget to 4616 c609719bSwdenk document these in the README file. 4617 c609719bSwdenk 4618 218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4619 218ca724SWolfgang Denk recommended) you can easily generate the patch using the 4620 7ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 4621 218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4622 218ca724SWolfgang Denk with some other mail clients. 4623 c609719bSwdenk 4624 218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4625 218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4626 218ca724SWolfgang Denk GNU diff. 4627 6dff5529Swdenk 4628 218ca724SWolfgang Denk The current directory when running this command shall be the parent 4629 218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4630 218ca724SWolfgang Denk your patch includes sufficient directory information for the 4631 218ca724SWolfgang Denk affected files). 4632 218ca724SWolfgang Denk 4633 218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4634 218ca724SWolfgang Denk and compressed attachments must not be used. 4635 c609719bSwdenk 4636 52f52c14Swdenk* If one logical set of modifications affects or creates several 4637 52f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 4638 52f52c14Swdenk 4639 52f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 4640 52f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 4641 52f52c14Swdenk 4642 52f52c14Swdenk 4643 c609719bSwdenkNotes: 4644 c609719bSwdenk 4645 c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4646 c609719bSwdenk source tree and make sure that no errors or warnings are reported 4647 c609719bSwdenk for any of the boards. 4648 c609719bSwdenk 4649 c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4650 c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4651 c609719bSwdenk returned with a request to re-formatting / split it. 4652 c609719bSwdenk 4653 c609719bSwdenk* If you modify existing code, make sure that your new code does not 4654 c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4655 c609719bSwdenk When adding new features, these should compile conditionally only 4656 c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4657 c609719bSwdenk disabled must not need more memory than the old code without your 4658 c609719bSwdenk modification. 4659 90dc6704Swdenk 4660 0668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 4661 0668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 4662 0668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 4663 0668236bSWolfgang Denk bigger than the size limit should be avoided. 4664