1 c609719bSwdenk# 2 b75190deSWolfgang Denk# (C) Copyright 2000 - 2012 3 c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 c609719bSwdenk# 5 c609719bSwdenk# See file CREDITS for list of people who contributed to this 6 c609719bSwdenk# project. 7 c609719bSwdenk# 8 c609719bSwdenk# This program is free software; you can redistribute it and/or 9 c609719bSwdenk# modify it under the terms of the GNU General Public License as 10 c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11 c609719bSwdenk# the License, or (at your option) any later version. 12 c609719bSwdenk# 13 c609719bSwdenk# This program is distributed in the hope that it will be useful, 14 c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15 c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 c609719bSwdenk# GNU General Public License for more details. 17 c609719bSwdenk# 18 c609719bSwdenk# You should have received a copy of the GNU General Public License 19 c609719bSwdenk# along with this program; if not, write to the Free Software 20 c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 c609719bSwdenk# MA 02111-1307 USA 22 c609719bSwdenk# 23 c609719bSwdenk 24 c609719bSwdenkSummary: 25 c609719bSwdenk======== 26 c609719bSwdenk 27 24ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28 e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29 e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30 e86e5a07Swdenkinitialize and test the hardware or to download and run application 31 e86e5a07Swdenkcode. 32 c609719bSwdenk 33 c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 34 24ee89b9Swdenkthe source code originate in the Linux source tree, we have some 35 24ee89b9Swdenkheader files in common, and special provision has been made to 36 c609719bSwdenksupport booting of Linux images. 37 c609719bSwdenk 38 c609719bSwdenkSome attention has been paid to make this software easily 39 c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40 c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41 c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42 c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43 c609719bSwdenkload and run it dynamically. 44 c609719bSwdenk 45 c609719bSwdenk 46 c609719bSwdenkStatus: 47 c609719bSwdenk======= 48 c609719bSwdenk 49 c609719bSwdenkIn general, all boards for which a configuration option exists in the 50 c609719bSwdenkMakefile have been tested to some extent and can be considered 51 c609719bSwdenk"working". In fact, many of them are used in production systems. 52 c609719bSwdenk 53 c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54 218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55 218ca724SWolfgang Denkmaintainers. 56 c609719bSwdenk 57 c609719bSwdenk 58 c609719bSwdenkWhere to get help: 59 c609719bSwdenk================== 60 c609719bSwdenk 61 c609719bSwdenkIn case you have questions about, problems with or contributions for 62 c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 63 0c32565fSPeter Tyser<u-boot@lists.denx.de>. There is also an archive of previous traffic 64 0c32565fSPeter Tyseron the mailing list - please search the archive before asking FAQ's. 65 0c32565fSPeter TyserPlease see http://lists.denx.de/pipermail/u-boot and 66 0c32565fSPeter Tyserhttp://dir.gmane.org/gmane.comp.boot-loaders.u-boot 67 c609719bSwdenk 68 c609719bSwdenk 69 218ca724SWolfgang DenkWhere to get source code: 70 218ca724SWolfgang Denk========================= 71 218ca724SWolfgang Denk 72 218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73 218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74 218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75 218ca724SWolfgang Denk 76 218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 77 11ccc33fSMarcel Ziswilerany version you might be interested in. Official releases are also 78 218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79 218ca724SWolfgang Denkdirectory. 80 218ca724SWolfgang Denk 81 d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82 218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83 218ca724SWolfgang Denk 84 218ca724SWolfgang Denk 85 c609719bSwdenkWhere we come from: 86 c609719bSwdenk=================== 87 c609719bSwdenk 88 c609719bSwdenk- start from 8xxrom sources 89 24ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90 c609719bSwdenk- clean up code 91 c609719bSwdenk- make it easier to add custom boards 92 c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93 c609719bSwdenk- extend functions, especially: 94 c609719bSwdenk * Provide extended interface to Linux boot loader 95 c609719bSwdenk * S-Record download 96 c609719bSwdenk * network boot 97 11ccc33fSMarcel Ziswiler * PCMCIA / CompactFlash / ATA disk / SCSI ... boot 98 24ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99 c609719bSwdenk- add other CPU families (starting with ARM) 100 24ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 101 0d28f34bSMagnus Lilja- current project page: see http://www.denx.de/wiki/U-Boot 102 24ee89b9Swdenk 103 24ee89b9Swdenk 104 24ee89b9SwdenkNames and Spelling: 105 24ee89b9Swdenk=================== 106 24ee89b9Swdenk 107 24ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 108 24ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 109 24ee89b9Swdenkin source files etc.). Example: 110 24ee89b9Swdenk 111 24ee89b9Swdenk This is the README file for the U-Boot project. 112 24ee89b9Swdenk 113 24ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 114 24ee89b9Swdenk 115 24ee89b9Swdenk include/asm-ppc/u-boot.h 116 24ee89b9Swdenk 117 24ee89b9Swdenk #include <asm/u-boot.h> 118 24ee89b9Swdenk 119 24ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 120 24ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 121 24ee89b9Swdenk 122 24ee89b9Swdenk U_BOOT_VERSION u_boot_logo 123 24ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124 c609719bSwdenk 125 c609719bSwdenk 126 93f19cc0SwdenkVersioning: 127 93f19cc0Swdenk=========== 128 93f19cc0Swdenk 129 360d883aSThomas WeberStarting with the release in October 2008, the names of the releases 130 360d883aSThomas Weberwere changed from numerical release numbers without deeper meaning 131 360d883aSThomas Weberinto a time stamp based numbering. Regular releases are identified by 132 360d883aSThomas Webernames consisting of the calendar year and month of the release date. 133 360d883aSThomas WeberAdditional fields (if present) indicate release candidates or bug fix 134 360d883aSThomas Weberreleases in "stable" maintenance trees. 135 93f19cc0Swdenk 136 360d883aSThomas WeberExamples: 137 360d883aSThomas Weber U-Boot v2009.11 - Release November 2009 138 360d883aSThomas Weber U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree 139 360d883aSThomas Weber U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release 140 93f19cc0Swdenk 141 93f19cc0Swdenk 142 c609719bSwdenkDirectory Hierarchy: 143 c609719bSwdenk==================== 144 c609719bSwdenk 145 8d321b81SPeter Tyser/arch Architecture specific files 146 8d321b81SPeter Tyser /arm Files generic to ARM architecture 147 8d321b81SPeter Tyser /cpu CPU specific files 148 8d321b81SPeter Tyser /arm720t Files specific to ARM 720 CPUs 149 8d321b81SPeter Tyser /arm920t Files specific to ARM 920 CPUs 150 6eb0921aSAndreas Bießmann /at91 Files specific to Atmel AT91RM9200 CPU 151 8d321b81SPeter Tyser /imx Files specific to Freescale MC9328 i.MX CPUs 152 8d321b81SPeter Tyser /s3c24x0 Files specific to Samsung S3C24X0 CPUs 153 8d321b81SPeter Tyser /arm925t Files specific to ARM 925 CPUs 154 8d321b81SPeter Tyser /arm926ejs Files specific to ARM 926 CPUs 155 8d321b81SPeter Tyser /arm1136 Files specific to ARM 1136 CPUs 156 8d321b81SPeter Tyser /ixp Files specific to Intel XScale IXP CPUs 157 8d321b81SPeter Tyser /pxa Files specific to Intel XScale PXA CPUs 158 8d321b81SPeter Tyser /s3c44b0 Files specific to Samsung S3C44B0 CPUs 159 8d321b81SPeter Tyser /sa1100 Files specific to Intel StrongARM SA1100 CPUs 160 8d321b81SPeter Tyser /lib Architecture specific library files 161 8d321b81SPeter Tyser /avr32 Files generic to AVR32 architecture 162 8d321b81SPeter Tyser /cpu CPU specific files 163 8d321b81SPeter Tyser /lib Architecture specific library files 164 8d321b81SPeter Tyser /blackfin Files generic to Analog Devices Blackfin architecture 165 8d321b81SPeter Tyser /cpu CPU specific files 166 8d321b81SPeter Tyser /lib Architecture specific library files 167 fea25720SGraeme Russ /x86 Files generic to x86 architecture 168 8d321b81SPeter Tyser /cpu CPU specific files 169 8d321b81SPeter Tyser /lib Architecture specific library files 170 8d321b81SPeter Tyser /m68k Files generic to m68k architecture 171 8d321b81SPeter Tyser /cpu CPU specific files 172 8d321b81SPeter Tyser /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 173 8d321b81SPeter Tyser /mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 174 8d321b81SPeter Tyser /mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 175 8d321b81SPeter Tyser /mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 176 8d321b81SPeter Tyser /mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 177 8d321b81SPeter Tyser /lib Architecture specific library files 178 8d321b81SPeter Tyser /microblaze Files generic to microblaze architecture 179 8d321b81SPeter Tyser /cpu CPU specific files 180 8d321b81SPeter Tyser /lib Architecture specific library files 181 8d321b81SPeter Tyser /mips Files generic to MIPS architecture 182 8d321b81SPeter Tyser /cpu CPU specific files 183 92bbd64eSDaniel Schwierzeck /mips32 Files specific to MIPS32 CPUs 184 80421fccSXiangfu Liu /xburst Files specific to Ingenic XBurst CPUs 185 8d321b81SPeter Tyser /lib Architecture specific library files 186 afc1ce82SMacpaul Lin /nds32 Files generic to NDS32 architecture 187 afc1ce82SMacpaul Lin /cpu CPU specific files 188 afc1ce82SMacpaul Lin /n1213 Files specific to Andes Technology N1213 CPUs 189 afc1ce82SMacpaul Lin /lib Architecture specific library files 190 8d321b81SPeter Tyser /nios2 Files generic to Altera NIOS2 architecture 191 8d321b81SPeter Tyser /cpu CPU specific files 192 8d321b81SPeter Tyser /lib Architecture specific library files 193 a47a12beSStefan Roese /powerpc Files generic to PowerPC architecture 194 8d321b81SPeter Tyser /cpu CPU specific files 195 8d321b81SPeter Tyser /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 196 8d321b81SPeter Tyser /mpc5xx Files specific to Freescale MPC5xx CPUs 197 8d321b81SPeter Tyser /mpc5xxx Files specific to Freescale MPC5xxx CPUs 198 8d321b81SPeter Tyser /mpc8xx Files specific to Freescale MPC8xx CPUs 199 8d321b81SPeter Tyser /mpc8220 Files specific to Freescale MPC8220 CPUs 200 8d321b81SPeter Tyser /mpc824x Files specific to Freescale MPC824x CPUs 201 8d321b81SPeter Tyser /mpc8260 Files specific to Freescale MPC8260 CPUs 202 8d321b81SPeter Tyser /mpc85xx Files specific to Freescale MPC85xx CPUs 203 8d321b81SPeter Tyser /ppc4xx Files specific to AMCC PowerPC 4xx CPUs 204 8d321b81SPeter Tyser /lib Architecture specific library files 205 8d321b81SPeter Tyser /sh Files generic to SH architecture 206 8d321b81SPeter Tyser /cpu CPU specific files 207 8d321b81SPeter Tyser /sh2 Files specific to sh2 CPUs 208 8d321b81SPeter Tyser /sh3 Files specific to sh3 CPUs 209 8d321b81SPeter Tyser /sh4 Files specific to sh4 CPUs 210 8d321b81SPeter Tyser /lib Architecture specific library files 211 8d321b81SPeter Tyser /sparc Files generic to SPARC architecture 212 8d321b81SPeter Tyser /cpu CPU specific files 213 8d321b81SPeter Tyser /leon2 Files specific to Gaisler LEON2 SPARC CPU 214 8d321b81SPeter Tyser /leon3 Files specific to Gaisler LEON3 SPARC CPU 215 8d321b81SPeter Tyser /lib Architecture specific library files 216 8d321b81SPeter Tyser/api Machine/arch independent API for external apps 217 8d321b81SPeter Tyser/board Board dependent files 218 8d321b81SPeter Tyser/common Misc architecture independent functions 219 8d321b81SPeter Tyser/disk Code for disk drive partition handling 220 8d321b81SPeter Tyser/doc Documentation (don't expect too much) 221 8d321b81SPeter Tyser/drivers Commonly used device drivers 222 8d321b81SPeter Tyser/examples Example code for standalone applications, etc. 223 8d321b81SPeter Tyser/fs Filesystem code (cramfs, ext2, jffs2, etc.) 224 8d321b81SPeter Tyser/include Header Files 225 8d321b81SPeter Tyser/lib Files generic to all architectures 226 8d321b81SPeter Tyser /libfdt Library files to support flattened device trees 227 8d321b81SPeter Tyser /lzma Library files to support LZMA decompression 228 8d321b81SPeter Tyser /lzo Library files to support LZO decompression 229 8d321b81SPeter Tyser/net Networking code 230 8d321b81SPeter Tyser/post Power On Self Test 231 8d321b81SPeter Tyser/rtc Real Time Clock drivers 232 8d321b81SPeter Tyser/tools Tools to build S-Record or U-Boot images, etc. 233 c609719bSwdenk 234 c609719bSwdenkSoftware Configuration: 235 c609719bSwdenk======================= 236 c609719bSwdenk 237 c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 238 c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 239 c609719bSwdenk 240 c609719bSwdenkThere are two classes of configuration variables: 241 c609719bSwdenk 242 c609719bSwdenk* Configuration _OPTIONS_: 243 c609719bSwdenk These are selectable by the user and have names beginning with 244 c609719bSwdenk "CONFIG_". 245 c609719bSwdenk 246 c609719bSwdenk* Configuration _SETTINGS_: 247 c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 248 c609719bSwdenk you don't know what you're doing; they have names beginning with 249 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD "CONFIG_SYS_". 250 c609719bSwdenk 251 c609719bSwdenkLater we will add a configuration tool - probably similar to or even 252 c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 253 c609719bSwdenkdo the configuration by hand, which means creating some symbolic 254 c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 255 c609719bSwdenkas an example here. 256 c609719bSwdenk 257 c609719bSwdenk 258 c609719bSwdenkSelection of Processor Architecture and Board Type: 259 c609719bSwdenk--------------------------------------------------- 260 c609719bSwdenk 261 c609719bSwdenkFor all supported boards there are ready-to-use default 262 c609719bSwdenkconfigurations available; just type "make <board_name>_config". 263 c609719bSwdenk 264 c609719bSwdenkExample: For a TQM823L module type: 265 c609719bSwdenk 266 c609719bSwdenk cd u-boot 267 c609719bSwdenk make TQM823L_config 268 c609719bSwdenk 269 11ccc33fSMarcel ZiswilerFor the Cogent platform, you need to specify the CPU type as well; 270 c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 271 c609719bSwdenkdirectory according to the instructions in cogent/README. 272 c609719bSwdenk 273 c609719bSwdenk 274 c609719bSwdenkConfiguration Options: 275 c609719bSwdenk---------------------- 276 c609719bSwdenk 277 c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 278 c609719bSwdenksuch information is kept in a configuration file 279 c609719bSwdenk"include/configs/<board_name>.h". 280 c609719bSwdenk 281 c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 282 c609719bSwdenk"include/configs/TQM823L.h". 283 c609719bSwdenk 284 c609719bSwdenk 285 7f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 286 7f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 287 7f6c2cbcSwdenkbuild a config tool - later. 288 7f6c2cbcSwdenk 289 7f6c2cbcSwdenk 290 c609719bSwdenkThe following options need to be configured: 291 c609719bSwdenk 292 2628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 293 c609719bSwdenk 294 2628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 295 6ccec449SWolfgang Denk 296 6ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 297 09ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 298 c609719bSwdenk 299 c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 300 c609719bSwdenk Define exactly one of 301 c609719bSwdenk CONFIG_CMA286_60_OLD 302 c609719bSwdenk--- FIXME --- not tested yet: 303 c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 304 c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 305 c609719bSwdenk 306 c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 307 c609719bSwdenk Define exactly one of 308 c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 309 c609719bSwdenk 310 c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 311 c609719bSwdenk Define one or more of 312 c609719bSwdenk CONFIG_CMA302 313 c609719bSwdenk 314 c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 315 c609719bSwdenk Define one or more of 316 c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 317 11ccc33fSMarcel Ziswiler the LCD display every second with 318 c609719bSwdenk a "rotator" |\-/|\-/ 319 c609719bSwdenk 320 2535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 321 2535d602Swdenk CONFIG_ADSTYPE 322 2535d602Swdenk Possible values are: 323 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8260ADS - original MPC8260ADS 324 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8266ADS - MPC8266ADS 325 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 326 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8272ADS - MPC8272ADS 327 2535d602Swdenk 328 cf946c6dSLei Wen- Marvell Family Member 329 cf946c6dSLei Wen CONFIG_SYS_MVFS - define it if you want to enable 330 cf946c6dSLei Wen multiple fs option at one time 331 cf946c6dSLei Wen for marvell soc family 332 cf946c6dSLei Wen 333 c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 334 c609719bSwdenk Define exactly one of 335 c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 336 c609719bSwdenk 337 11ccc33fSMarcel Ziswiler- 8xx CPU Options: (if using an MPC8xx CPU) 338 66ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 339 66ca92a5Swdenk get_gclk_freq() cannot work 340 5da627a4Swdenk e.g. if there is no 32KHz 341 5da627a4Swdenk reference PIT/RTC clock 342 66ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 343 66ca92a5Swdenk or XTAL/EXTAL) 344 c609719bSwdenk 345 66ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 346 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MIN 347 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_8xx_CPUCLK_MAX 348 66ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 349 75d1ea7fSwdenk See doc/README.MPC866 350 75d1ea7fSwdenk 351 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MEASURE_CPUCLK 352 75d1ea7fSwdenk 353 75d1ea7fSwdenk Define this to measure the actual CPU clock instead 354 75d1ea7fSwdenk of relying on the correctness of the configured 355 75d1ea7fSwdenk values. Mostly useful for board bringup to make sure 356 75d1ea7fSwdenk the PLL is locked at the intended frequency. Note 357 75d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 358 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD RTC clock or CONFIG_SYS_8XX_XIN) 359 75d1ea7fSwdenk 360 506f3918SHeiko Schocher CONFIG_SYS_DELAYED_ICACHE 361 506f3918SHeiko Schocher 362 506f3918SHeiko Schocher Define this option if you want to enable the 363 506f3918SHeiko Schocher ICache only when Code runs from RAM. 364 506f3918SHeiko Schocher 365 66412c63SKumar Gala- 85xx CPU Options: 366 66412c63SKumar Gala CONFIG_SYS_FSL_TBCLK_DIV 367 66412c63SKumar Gala 368 66412c63SKumar Gala Defines the core time base clock divider ratio compared to the 369 66412c63SKumar Gala system clock. On most PQ3 devices this is 8, on newer QorIQ 370 66412c63SKumar Gala devices it can be 16 or 32. The ratio varies from SoC to Soc. 371 66412c63SKumar Gala 372 8f29084aSKumar Gala CONFIG_SYS_FSL_PCIE_COMPAT 373 8f29084aSKumar Gala 374 8f29084aSKumar Gala Defines the string to utilize when trying to match PCIe device 375 8f29084aSKumar Gala tree nodes for the given platform. 376 8f29084aSKumar Gala 377 0b953ffcSMarkus Klotzbuecher- Intel Monahans options: 378 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO 379 0b953ffcSMarkus Klotzbuecher 380 0b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 381 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 382 0b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 383 0b953ffcSMarkus Klotzbuecher 384 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO 385 0b953ffcSMarkus Klotzbuecher 386 0b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 387 0b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 388 0b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 389 0b953ffcSMarkus Klotzbuecher by this value. 390 0b953ffcSMarkus Klotzbuecher 391 92bbd64eSDaniel Schwierzeck- MIPS CPU options: 392 92bbd64eSDaniel Schwierzeck CONFIG_SYS_INIT_SP_OFFSET 393 92bbd64eSDaniel Schwierzeck 394 92bbd64eSDaniel Schwierzeck Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack 395 92bbd64eSDaniel Schwierzeck pointer. This is needed for the temporary stack before 396 92bbd64eSDaniel Schwierzeck relocation. 397 92bbd64eSDaniel Schwierzeck 398 92bbd64eSDaniel Schwierzeck CONFIG_SYS_MIPS_CACHE_MODE 399 92bbd64eSDaniel Schwierzeck 400 92bbd64eSDaniel Schwierzeck Cache operation mode for the MIPS CPU. 401 92bbd64eSDaniel Schwierzeck See also arch/mips/include/asm/mipsregs.h. 402 92bbd64eSDaniel Schwierzeck Possible values are: 403 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NO_WA 404 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_WA 405 92bbd64eSDaniel Schwierzeck CONF_CM_UNCACHED 406 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_NONCOHERENT 407 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CE 408 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_COW 409 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_CUW 410 92bbd64eSDaniel Schwierzeck CONF_CM_CACHABLE_ACCELERATED 411 92bbd64eSDaniel Schwierzeck 412 92bbd64eSDaniel Schwierzeck CONFIG_SYS_XWAY_EBU_BOOTCFG 413 92bbd64eSDaniel Schwierzeck 414 92bbd64eSDaniel Schwierzeck Special option for Lantiq XWAY SoCs for booting from NOR flash. 415 92bbd64eSDaniel Schwierzeck See also arch/mips/cpu/mips32/start.S. 416 92bbd64eSDaniel Schwierzeck 417 92bbd64eSDaniel Schwierzeck CONFIG_XWAY_SWAP_BYTES 418 92bbd64eSDaniel Schwierzeck 419 92bbd64eSDaniel Schwierzeck Enable compilation of tools/xway-swap-bytes needed for Lantiq 420 92bbd64eSDaniel Schwierzeck XWAY SoCs for booting from NOR flash. The U-Boot image needs to 421 92bbd64eSDaniel Schwierzeck be swapped if a flash programmer is used. 422 92bbd64eSDaniel Schwierzeck 423 b67d8816SChristian Riesch- ARM options: 424 b67d8816SChristian Riesch CONFIG_SYS_EXCEPTION_VECTORS_HIGH 425 b67d8816SChristian Riesch 426 b67d8816SChristian Riesch Select high exception vectors of the ARM core, e.g., do not 427 b67d8816SChristian Riesch clear the V bit of the c1 register of CP15. 428 b67d8816SChristian Riesch 429 5da627a4Swdenk- Linux Kernel Interface: 430 c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 431 c609719bSwdenk 432 c609719bSwdenk U-Boot stores all clock information in Hz 433 c609719bSwdenk internally. For binary compatibility with older Linux 434 c609719bSwdenk kernels (which expect the clocks passed in the 435 c609719bSwdenk bd_info data to be in MHz) the environment variable 436 c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 437 c609719bSwdenk converts clock data to MHZ before passing it to the 438 c609719bSwdenk Linux kernel. 439 c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 440 c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 441 c609719bSwdenk default environment. 442 c609719bSwdenk 443 5da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 444 5da627a4Swdenk 445 11ccc33fSMarcel Ziswiler When transferring memsize parameter to linux, some versions 446 5da627a4Swdenk expect it to be in bytes, others in MB. 447 5da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 448 5da627a4Swdenk 449 fec6d9eeSGerald Van Baren CONFIG_OF_LIBFDT 450 f57f70aaSWolfgang Denk 451 f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 452 213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 453 213bf8c8SGerald Van Baren concepts). 454 213bf8c8SGerald Van Baren 455 213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 456 213bf8c8SGerald Van Baren * New libfdt-based support 457 213bf8c8SGerald Van Baren * Adds the "fdt" command 458 3bb342fcSKim Phillips * The bootm command automatically updates the fdt 459 213bf8c8SGerald Van Baren 460 b55ae402SMarcel Ziswiler OF_CPU - The proper name of the cpus node (only required for 461 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 462 b55ae402SMarcel Ziswiler OF_SOC - The proper name of the soc node (only required for 463 b55ae402SMarcel Ziswiler MPC512X and MPC5xxx based boards). 464 f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 465 c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 466 f57f70aaSWolfgang Denk 467 11ccc33fSMarcel Ziswiler boards with QUICC Engines require OF_QE to set UCC MAC 468 11ccc33fSMarcel Ziswiler addresses 469 3bb342fcSKim Phillips 470 4e253137SKumar Gala CONFIG_OF_BOARD_SETUP 471 4e253137SKumar Gala 472 4e253137SKumar Gala Board code has addition modification that it wants to make 473 4e253137SKumar Gala to the flat device tree before handing it off to the kernel 474 6705d81eSwdenk 475 0267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 476 0267768eSMatthew McClintock 477 11ccc33fSMarcel Ziswiler This define fills in the correct boot CPU in the boot 478 0267768eSMatthew McClintock param header, the default value is zero if undefined. 479 0267768eSMatthew McClintock 480 3887c3fbSHeiko Schocher CONFIG_OF_IDE_FIXUP 481 3887c3fbSHeiko Schocher 482 3887c3fbSHeiko Schocher U-Boot can detect if an IDE device is present or not. 483 3887c3fbSHeiko Schocher If not, and this new config option is activated, U-Boot 484 3887c3fbSHeiko Schocher removes the ATA node from the DTS before booting Linux, 485 3887c3fbSHeiko Schocher so the Linux IDE driver does not probe the device and 486 3887c3fbSHeiko Schocher crash. This is needed for buggy hardware (uc101) where 487 3887c3fbSHeiko Schocher no pull down resistor is connected to the signal IDE5V_DD7. 488 3887c3fbSHeiko Schocher 489 7eb29398SIgor Grinberg CONFIG_MACH_TYPE [relevant for ARM only][mandatory] 490 7eb29398SIgor Grinberg 491 7eb29398SIgor Grinberg This setting is mandatory for all boards that have only one 492 7eb29398SIgor Grinberg machine type and must be used to specify the machine type 493 7eb29398SIgor Grinberg number as it appears in the ARM machine registry 494 7eb29398SIgor Grinberg (see http://www.arm.linux.org.uk/developer/machines/). 495 7eb29398SIgor Grinberg Only boards that have multiple machine types supported 496 7eb29398SIgor Grinberg in a single configuration file and the machine type is 497 7eb29398SIgor Grinberg runtime discoverable, do not have to use this setting. 498 7eb29398SIgor Grinberg 499 0b2f4ecaSNiklaus Giger- vxWorks boot parameters: 500 0b2f4ecaSNiklaus Giger 501 0b2f4ecaSNiklaus Giger bootvx constructs a valid bootline using the following 502 0b2f4ecaSNiklaus Giger environments variables: bootfile, ipaddr, serverip, hostname. 503 0b2f4ecaSNiklaus Giger It loads the vxWorks image pointed bootfile. 504 0b2f4ecaSNiklaus Giger 505 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_DEVICE - The vxworks device name 506 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_MAC_PTR - Ethernet 6 byte MA -address 507 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_SERVERNAME - Name of the server 508 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_BOOT_ADDR - Address of boot parameters 509 0b2f4ecaSNiklaus Giger 510 0b2f4ecaSNiklaus Giger CONFIG_SYS_VXWORKS_ADD_PARAMS 511 0b2f4ecaSNiklaus Giger 512 0b2f4ecaSNiklaus Giger Add it at the end of the bootline. E.g "u=username pw=secret" 513 0b2f4ecaSNiklaus Giger 514 0b2f4ecaSNiklaus Giger Note: If a "bootargs" environment is defined, it will overwride 515 0b2f4ecaSNiklaus Giger the defaults discussed just above. 516 0b2f4ecaSNiklaus Giger 517 2c451f78SAneesh V- Cache Configuration: 518 2c451f78SAneesh V CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot 519 2c451f78SAneesh V CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot 520 2c451f78SAneesh V CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot 521 2c451f78SAneesh V 522 93bc2193SAneesh V- Cache Configuration for ARM: 523 93bc2193SAneesh V CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache 524 93bc2193SAneesh V controller 525 93bc2193SAneesh V CONFIG_SYS_PL310_BASE - Physical base address of PL310 526 93bc2193SAneesh V controller register space 527 93bc2193SAneesh V 528 6705d81eSwdenk- Serial Ports: 529 48d0192fSAndreas Engel CONFIG_PL010_SERIAL 530 6705d81eSwdenk 531 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 532 6705d81eSwdenk 533 48d0192fSAndreas Engel CONFIG_PL011_SERIAL 534 6705d81eSwdenk 535 6705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 536 6705d81eSwdenk 537 6705d81eSwdenk CONFIG_PL011_CLOCK 538 6705d81eSwdenk 539 6705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 540 6705d81eSwdenk the clock speed of the UARTs. 541 6705d81eSwdenk 542 6705d81eSwdenk CONFIG_PL01x_PORTS 543 6705d81eSwdenk 544 6705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 545 6705d81eSwdenk define this to a list of base addresses for each (supported) 546 6705d81eSwdenk port. See e.g. include/configs/versatile.h 547 6705d81eSwdenk 548 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_RLCR 549 910f1ae3SJohn Rigby 550 910f1ae3SJohn Rigby Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) 551 910f1ae3SJohn Rigby have separate receive and transmit line control registers. Set 552 910f1ae3SJohn Rigby this variable to initialize the extra register. 553 910f1ae3SJohn Rigby 554 910f1ae3SJohn Rigby CONFIG_PL011_SERIAL_FLUSH_ON_INIT 555 910f1ae3SJohn Rigby 556 910f1ae3SJohn Rigby On some platforms (e.g. U8500) U-Boot is loaded by a second stage 557 910f1ae3SJohn Rigby boot loader that has already initialized the UART. Define this 558 910f1ae3SJohn Rigby variable to flush the UART at init time. 559 910f1ae3SJohn Rigby 560 6705d81eSwdenk 561 c609719bSwdenk- Console Interface: 562 c609719bSwdenk Depending on board, define exactly one serial port 563 c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 564 c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 565 c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 566 c609719bSwdenk 567 c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 568 c609719bSwdenk port routines must be defined elsewhere 569 c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 570 c609719bSwdenk 571 c609719bSwdenk CONFIG_CFB_CONSOLE 572 c609719bSwdenk Enables console device for a color framebuffer. Needs following 573 c53043b7SWolfgang Denk defines (cf. smiLynxEM, i8042) 574 c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 575 c609719bSwdenk (default big endian) 576 c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 577 c609719bSwdenk rectangle fill 578 c609719bSwdenk (cf. smiLynxEM) 579 c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 580 c609719bSwdenk bit-blit (cf. smiLynxEM) 581 c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 582 c609719bSwdenk (cols=pitch) 583 c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 584 c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 585 c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 586 c609719bSwdenk (0-5, cf. cfb_console.c) 587 c609719bSwdenk VIDEO_FB_ADRS framebuffer address 588 c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 589 c609719bSwdenk (i.e. i8042_kbd_init()) 590 c609719bSwdenk VIDEO_TSTC_FCT test char fct 591 c609719bSwdenk (i.e. i8042_tstc) 592 c609719bSwdenk VIDEO_GETC_FCT get char fct 593 c609719bSwdenk (i.e. i8042_getc) 594 c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 595 c609719bSwdenk (requires blink timer 596 c609719bSwdenk cf. i8042.c) 597 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 598 c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 599 c609719bSwdenk upper right corner 600 602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 601 c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 602 c609719bSwdenk upper left corner 603 a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 604 a6c7ad2fSwdenk linux_logo.h for logo. 605 a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 606 c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 607 11ccc33fSMarcel Ziswiler additional board info beside 608 c609719bSwdenk the logo 609 c609719bSwdenk 610 c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 611 c609719bSwdenk default i/o. Serial console can be forced with 612 c609719bSwdenk environment 'console=serial'. 613 c609719bSwdenk 614 a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 615 a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 616 a3ad8e26Swdenk the "silent" environment variable. See 617 a3ad8e26Swdenk doc/README.silent for more information. 618 a3ad8e26Swdenk 619 c609719bSwdenk- Console Baudrate: 620 c609719bSwdenk CONFIG_BAUDRATE - in bps 621 c609719bSwdenk Select one of the baudrates listed in 622 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 623 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale 624 c609719bSwdenk 625 c92fac91SHeiko Schocher- Console Rx buffer length 626 c92fac91SHeiko Schocher With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 627 c92fac91SHeiko Schocher the maximum receive buffer length for the SMC. 628 2b3f12c2SHeiko Schocher This option is actual only for 82xx and 8xx possible. 629 c92fac91SHeiko Schocher If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 630 c92fac91SHeiko Schocher must be defined, to setup the maximum idle timeout for 631 c92fac91SHeiko Schocher the SMC. 632 c92fac91SHeiko Schocher 633 9558b48aSGraeme Russ- Pre-Console Buffer: 634 9558b48aSGraeme Russ Prior to the console being initialised (i.e. serial UART 635 9558b48aSGraeme Russ initialised etc) all console output is silently discarded. 636 9558b48aSGraeme Russ Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to 637 9558b48aSGraeme Russ buffer any console messages prior to the console being 638 9558b48aSGraeme Russ initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ 639 9558b48aSGraeme Russ bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is 640 9558b48aSGraeme Russ a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ 641 9558b48aSGraeme Russ bytes are output before the console is initialised, the 642 9558b48aSGraeme Russ earlier bytes are discarded. 643 9558b48aSGraeme Russ 644 9558b48aSGraeme Russ 'Sane' compilers will generate smaller code if 645 9558b48aSGraeme Russ CONFIG_PRE_CON_BUF_SZ is a power of 2 646 9558b48aSGraeme Russ 647 295d3942SSimon Glass- Pre-console putc(): 648 295d3942SSimon Glass Prior to the console being initialised, console output is 649 295d3942SSimon Glass normally silently discarded. This can be annoying if a 650 295d3942SSimon Glass panic() happens in this time. 651 295d3942SSimon Glass 652 295d3942SSimon Glass If the CONFIG_PRE_CONSOLE_PUTC option is defined, then 653 295d3942SSimon Glass U-Boot will call board_pre_console_putc() for each output 654 295d3942SSimon Glass character in this case, This function should try to output 655 295d3942SSimon Glass the character if possible, perhaps on all available UARTs 656 295d3942SSimon Glass (it will need to do this directly, since the console code 657 295d3942SSimon Glass is not functional yet). Note that if the panic happens 658 295d3942SSimon Glass early enough, then it is possible that board_init_f() 659 295d3942SSimon Glass (or even arch_cpu_init() on ARM) has not been called yet. 660 295d3942SSimon Glass You should init all clocks, GPIOs, etc. that are needed 661 295d3942SSimon Glass to get the character out. Baud rates will need to default 662 295d3942SSimon Glass to something sensible. 663 295d3942SSimon Glass 664 046a37bdSSonny Rao- Safe printf() functions 665 046a37bdSSonny Rao Define CONFIG_SYS_VSNPRINTF to compile in safe versions of 666 046a37bdSSonny Rao the printf() functions. These are defined in 667 046a37bdSSonny Rao include/vsprintf.h and include snprintf(), vsnprintf() and 668 046a37bdSSonny Rao so on. Code size increase is approximately 300-500 bytes. 669 046a37bdSSonny Rao If this option is not given then these functions will 670 046a37bdSSonny Rao silently discard their buffer size argument - this means 671 046a37bdSSonny Rao you are not getting any overflow checking in this case. 672 046a37bdSSonny Rao 673 c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 674 c609719bSwdenk Delay before automatically booting the default image; 675 c609719bSwdenk set to -1 to disable autoboot. 676 c609719bSwdenk 677 c609719bSwdenk See doc/README.autoboot for these options that 678 c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 679 c609719bSwdenk CONFIG_BOOT_RETRY_TIME 680 c609719bSwdenk CONFIG_BOOT_RETRY_MIN 681 c609719bSwdenk CONFIG_AUTOBOOT_KEYED 682 c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 683 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 684 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 685 c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 686 c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 687 c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 688 c609719bSwdenk CONFIG_RESET_TO_RETRY 689 c609719bSwdenk 690 c609719bSwdenk- Autoboot Command: 691 c609719bSwdenk CONFIG_BOOTCOMMAND 692 c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 693 c609719bSwdenk define a command string that is automatically executed 694 c609719bSwdenk when no character is read on the console interface 695 c609719bSwdenk within "Boot Delay" after reset. 696 c609719bSwdenk 697 c609719bSwdenk CONFIG_BOOTARGS 698 c609719bSwdenk This can be used to pass arguments to the bootm 699 c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 700 c609719bSwdenk environment value "bootargs". 701 c609719bSwdenk 702 c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 703 c609719bSwdenk The value of these goes into the environment as 704 c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 705 c609719bSwdenk as a convenience, when switching between booting from 706 11ccc33fSMarcel Ziswiler RAM and NFS. 707 c609719bSwdenk 708 c609719bSwdenk- Pre-Boot Commands: 709 c609719bSwdenk CONFIG_PREBOOT 710 c609719bSwdenk 711 c609719bSwdenk When this option is #defined, the existence of the 712 c609719bSwdenk environment variable "preboot" will be checked 713 c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 714 c609719bSwdenk countdown and/or running the auto-boot command resp. 715 c609719bSwdenk entering interactive mode. 716 c609719bSwdenk 717 c609719bSwdenk This feature is especially useful when "preboot" is 718 c609719bSwdenk automatically generated or modified. For an example 719 c609719bSwdenk see the LWMON board specific code: here "preboot" is 720 c609719bSwdenk modified when the user holds down a certain 721 c609719bSwdenk combination of keys on the (special) keyboard when 722 c609719bSwdenk booting the systems 723 c609719bSwdenk 724 c609719bSwdenk- Serial Download Echo Mode: 725 c609719bSwdenk CONFIG_LOADS_ECHO 726 c609719bSwdenk If defined to 1, all characters received during a 727 c609719bSwdenk serial download (using the "loads" command) are 728 c609719bSwdenk echoed back. This might be needed by some terminal 729 c609719bSwdenk emulations (like "cu"), but may as well just take 730 c609719bSwdenk time on others. This setting #define's the initial 731 c609719bSwdenk value of the "loads_echo" environment variable. 732 c609719bSwdenk 733 602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 734 c609719bSwdenk CONFIG_KGDB_BAUDRATE 735 c609719bSwdenk Select one of the baudrates listed in 736 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BAUDRATE_TABLE, see below. 737 c609719bSwdenk 738 c609719bSwdenk- Monitor Functions: 739 602ad3b3SJon Loeliger Monitor commands can be included or excluded 740 602ad3b3SJon Loeliger from the build by using the #include files 741 602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 742 602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 743 602ad3b3SJon Loeliger and augmenting with additional #define's 744 602ad3b3SJon Loeliger for wanted commands. 745 c609719bSwdenk 746 602ad3b3SJon Loeliger The default command configuration includes all commands 747 602ad3b3SJon Loeliger except those marked below with a "*". 748 602ad3b3SJon Loeliger 749 602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 750 602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 751 602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 752 602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 753 602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 754 602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 755 602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 756 602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 757 710b9938SMike Frysinger CONFIG_CMD_CRC32 * crc32 758 602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 759 602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 760 602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 761 a7c93104SPeter Tyser CONFIG_CMD_DS4510 * ds4510 I2C gpio commands 762 a7c93104SPeter Tyser CONFIG_CMD_DS4510_INFO * ds4510 I2C info command 763 a7c93104SPeter Tyser CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd 764 a7c93104SPeter Tyser CONFIG_CMD_DS4510_RST * ds4510 I2C rst command 765 602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 766 602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 767 246c6922SPeter Tyser CONFIG_CMD_EDITENV edit env variable 768 602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 769 602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 770 0c79cda0SMike Frysinger CONFIG_CMD_EXPORTENV * export the environment 771 bdab39d3SMike Frysinger CONFIG_CMD_SAVEENV saveenv 772 602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 773 602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 774 602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 775 602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 776 602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 777 a641b979SMike Frysinger CONFIG_CMD_GO * the 'go' command (exec code) 778 a000b795SKim Phillips CONFIG_CMD_GREPENV * search environment 779 602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 780 602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 781 602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 782 602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 783 602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 784 602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 785 0c79cda0SMike Frysinger CONFIG_CMD_IMPORTENV * import an environment 786 602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 787 602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 788 602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 789 602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 790 1ba7fd25SMike Frysinger CONFIG_CMD_LDRINFO ldrinfo (display Blackfin loader) 791 602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 792 602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 793 02c9aa1dSRobin Getz CONFIG_CMD_MD5SUM print md5 message digest 794 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY and CONFIG_MD5) 795 602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 796 56523f12Swdenk loop, loopw, mtest 797 602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 798 602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 799 602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 800 68d7d651SStefan Roese CONFIG_CMD_MTDPARTS * MTD partition support 801 602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 802 602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 803 e92739d3SPeter Tyser CONFIG_CMD_PCA953X * PCA953x I2C gpio commands 804 e92739d3SPeter Tyser CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command 805 602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 806 602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 807 602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 808 602ad3b3SJon Loeliger host 809 602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 810 602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 811 602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 812 602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 813 602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 814 602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 815 602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 816 602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 817 602ad3b3SJon Loeliger (4xx only) 818 f61ec45eSEric Nelson CONFIG_CMD_SF * Read/write/erase SPI NOR flash 819 c6b1ee66SAlexander Holler CONFIG_CMD_SHA1SUM print sha1 memory digest 820 02c9aa1dSRobin Getz (requires CONFIG_CMD_MEMORY) 821 74de7aefSWolfgang Denk CONFIG_CMD_SOURCE "source" command Support 822 602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 823 7a83af07SLuca Ceresoli CONFIG_CMD_TFTPSRV * TFTP transfer in server mode 824 1fb7cd49SSimon Glass CONFIG_CMD_TFTPPUT * TFTP put command (upload) 825 ca366d0eSChe-liang Chiou CONFIG_CMD_TIME * run command and report execution time 826 602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 827 602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 828 602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 829 c609719bSwdenk 830 c609719bSwdenk 831 c609719bSwdenk EXAMPLE: If you want all functions except of network 832 c609719bSwdenk support you can write: 833 c609719bSwdenk 834 602ad3b3SJon Loeliger #include "config_cmd_all.h" 835 602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 836 c609719bSwdenk 837 213bf8c8SGerald Van Baren Other Commands: 838 213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 839 c609719bSwdenk 840 c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 841 602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 842 c609719bSwdenk what you (and your U-Boot users) are doing. Data 843 c609719bSwdenk cache cannot be enabled on systems like the 8xx or 844 c609719bSwdenk 8260 (where accesses to the IMMR region must be 845 c609719bSwdenk uncached), and it cannot be disabled on all other 846 c609719bSwdenk systems where we (mis-) use the data cache to hold an 847 c609719bSwdenk initial stack and some data. 848 c609719bSwdenk 849 c609719bSwdenk 850 c609719bSwdenk XXX - this list needs to get updated! 851 c609719bSwdenk 852 45ba8077SSimon Glass- Device tree: 853 45ba8077SSimon Glass CONFIG_OF_CONTROL 854 45ba8077SSimon Glass If this variable is defined, U-Boot will use a device tree 855 45ba8077SSimon Glass to configure its devices, instead of relying on statically 856 45ba8077SSimon Glass compiled #defines in the board file. This option is 857 45ba8077SSimon Glass experimental and only available on a few boards. The device 858 45ba8077SSimon Glass tree is available in the global data as gd->fdt_blob. 859 45ba8077SSimon Glass 860 2c0f79e4SSimon Glass U-Boot needs to get its device tree from somewhere. This can 861 2c0f79e4SSimon Glass be done using one of the two options below: 862 bbb0b128SSimon Glass 863 bbb0b128SSimon Glass CONFIG_OF_EMBED 864 bbb0b128SSimon Glass If this variable is defined, U-Boot will embed a device tree 865 bbb0b128SSimon Glass binary in its image. This device tree file should be in the 866 bbb0b128SSimon Glass board directory and called <soc>-<board>.dts. The binary file 867 bbb0b128SSimon Glass is then picked up in board_init_f() and made available through 868 bbb0b128SSimon Glass the global data structure as gd->blob. 869 45ba8077SSimon Glass 870 2c0f79e4SSimon Glass CONFIG_OF_SEPARATE 871 2c0f79e4SSimon Glass If this variable is defined, U-Boot will build a device tree 872 2c0f79e4SSimon Glass binary. It will be called u-boot.dtb. Architecture-specific 873 2c0f79e4SSimon Glass code will locate it at run-time. Generally this works by: 874 2c0f79e4SSimon Glass 875 2c0f79e4SSimon Glass cat u-boot.bin u-boot.dtb >image.bin 876 2c0f79e4SSimon Glass 877 2c0f79e4SSimon Glass and in fact, U-Boot does this for you, creating a file called 878 2c0f79e4SSimon Glass u-boot-dtb.bin which is useful in the common case. You can 879 2c0f79e4SSimon Glass still use the individual files if you need something more 880 2c0f79e4SSimon Glass exotic. 881 2c0f79e4SSimon Glass 882 c609719bSwdenk- Watchdog: 883 c609719bSwdenk CONFIG_WATCHDOG 884 c609719bSwdenk If this variable is defined, it enables watchdog 885 6abe6fb6SDetlev Zundel support for the SoC. There must be support in the SoC 886 6abe6fb6SDetlev Zundel specific code for a watchdog. For the 8xx and 8260 887 6abe6fb6SDetlev Zundel CPUs, the SIU Watchdog feature is enabled in the SYPCR 888 6abe6fb6SDetlev Zundel register. When supported for a specific SoC is 889 6abe6fb6SDetlev Zundel available, then no further board specific code should 890 6abe6fb6SDetlev Zundel be needed to use it. 891 6abe6fb6SDetlev Zundel 892 6abe6fb6SDetlev Zundel CONFIG_HW_WATCHDOG 893 6abe6fb6SDetlev Zundel When using a watchdog circuitry external to the used 894 6abe6fb6SDetlev Zundel SoC, then define this variable and provide board 895 6abe6fb6SDetlev Zundel specific code for the "hw_watchdog_reset" function. 896 c609719bSwdenk 897 c1551ea8Sstroese- U-Boot Version: 898 c1551ea8Sstroese CONFIG_VERSION_VARIABLE 899 c1551ea8Sstroese If this variable is defined, an environment variable 900 c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 901 c1551ea8Sstroese version as printed by the "version" command. 902 c1551ea8Sstroese This variable is readonly. 903 c1551ea8Sstroese 904 c609719bSwdenk- Real-Time Clock: 905 c609719bSwdenk 906 602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 907 c609719bSwdenk has to be selected, too. Define exactly one of the 908 c609719bSwdenk following options: 909 c609719bSwdenk 910 c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 911 c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 912 4e8b7544SFabio Estevam CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC 913 c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 914 1cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 915 c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 916 7f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 917 3bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 918 9536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 919 4c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 920 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 921 71d19f30SHeiko Schocher CONFIG_SYS_RV3029_TCR - enable trickle charger on 922 71d19f30SHeiko Schocher RV3029 RTC. 923 c609719bSwdenk 924 b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 925 b37c7e5eSwdenk must also be configured. See I2C Support, below. 926 b37c7e5eSwdenk 927 e92739d3SPeter Tyser- GPIO Support: 928 e92739d3SPeter Tyser CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO 929 e92739d3SPeter Tyser CONFIG_PCA953X_INFO - enable pca953x info command 930 e92739d3SPeter Tyser 931 5dec49caSChris Packham The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of 932 5dec49caSChris Packham chip-ngpio pairs that tell the PCA953X driver the number of 933 5dec49caSChris Packham pins supported by a particular chip. 934 5dec49caSChris Packham 935 e92739d3SPeter Tyser Note that if the GPIO device uses I2C, then the I2C interface 936 e92739d3SPeter Tyser must also be configured. See I2C Support, below. 937 e92739d3SPeter Tyser 938 c609719bSwdenk- Timestamp Support: 939 c609719bSwdenk 940 c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 941 c609719bSwdenk (date and time) of an image is printed by image 942 c609719bSwdenk commands like bootm or iminfo. This option is 943 602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 944 c609719bSwdenk 945 c609719bSwdenk- Partition Support: 946 c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 947 07f3d789Srichardretanubun and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION 948 c609719bSwdenk 949 602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 950 218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 951 218ca724SWolfgang Denk least one partition type as well. 952 c609719bSwdenk 953 c609719bSwdenk- IDE Reset method: 954 4d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 955 4d13cbadSwdenk board configurations files but used nowhere! 956 c609719bSwdenk 957 4d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 958 4d13cbadSwdenk be performed by calling the function 959 4d13cbadSwdenk ide_set_reset(int reset) 960 4d13cbadSwdenk which has to be defined in a board specific file 961 c609719bSwdenk 962 c609719bSwdenk- ATAPI Support: 963 c609719bSwdenk CONFIG_ATAPI 964 c609719bSwdenk 965 c609719bSwdenk Set this to enable ATAPI support. 966 c609719bSwdenk 967 c40b2956Swdenk- LBA48 Support 968 c40b2956Swdenk CONFIG_LBA48 969 c40b2956Swdenk 970 c40b2956Swdenk Set this to enable support for disks larger than 137GB 971 4b142febSHeiko Schocher Also look at CONFIG_SYS_64BIT_LBA. 972 c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 973 c40b2956Swdenk support disks up to 2.1TB. 974 c40b2956Swdenk 975 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_64BIT_LBA: 976 c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 977 c40b2956Swdenk Default is 32bit. 978 c40b2956Swdenk 979 c609719bSwdenk- SCSI Support: 980 c609719bSwdenk At the moment only there is only support for the 981 c609719bSwdenk SYM53C8XX SCSI controller; define 982 c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 983 c609719bSwdenk 984 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and 985 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * 986 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the 987 c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 988 c609719bSwdenk devices. 989 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 990 c609719bSwdenk 991 c609719bSwdenk- NETWORK Support (PCI): 992 682011ffSwdenk CONFIG_E1000 993 ce5207e1SKyle Moffett Support for Intel 8254x/8257x gigabit chips. 994 ce5207e1SKyle Moffett 995 ce5207e1SKyle Moffett CONFIG_E1000_SPI 996 ce5207e1SKyle Moffett Utility code for direct access to the SPI bus on Intel 8257x. 997 ce5207e1SKyle Moffett This does not do anything useful unless you set at least one 998 ce5207e1SKyle Moffett of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. 999 ce5207e1SKyle Moffett 1000 ce5207e1SKyle Moffett CONFIG_E1000_SPI_GENERIC 1001 ce5207e1SKyle Moffett Allow generic access to the SPI bus on the Intel 8257x, for 1002 ce5207e1SKyle Moffett example with the "sspi" command. 1003 ce5207e1SKyle Moffett 1004 ce5207e1SKyle Moffett CONFIG_CMD_E1000 1005 ce5207e1SKyle Moffett Management command for E1000 devices. When used on devices 1006 ce5207e1SKyle Moffett with SPI support you can reprogram the EEPROM from U-Boot. 1007 682011ffSwdenk 1008 ac3315c2SAndre Schwarz CONFIG_E1000_FALLBACK_MAC 1009 11ccc33fSMarcel Ziswiler default MAC for empty EEPROM after production. 1010 ac3315c2SAndre Schwarz 1011 c609719bSwdenk CONFIG_EEPRO100 1012 c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 1013 11ccc33fSMarcel Ziswiler Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM 1014 c609719bSwdenk write routine for first time initialisation. 1015 c609719bSwdenk 1016 c609719bSwdenk CONFIG_TULIP 1017 c609719bSwdenk Support for Digital 2114x chips. 1018 c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 1019 c609719bSwdenk modem chip initialisation (KS8761/QS6611). 1020 c609719bSwdenk 1021 c609719bSwdenk CONFIG_NATSEMI 1022 c609719bSwdenk Support for National dp83815 chips. 1023 c609719bSwdenk 1024 c609719bSwdenk CONFIG_NS8382X 1025 c609719bSwdenk Support for National dp8382[01] gigabit chips. 1026 c609719bSwdenk 1027 45219c46Swdenk- NETWORK Support (other): 1028 45219c46Swdenk 1029 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC 1030 c041e9d2SJens Scharsig Support for AT91RM9200 EMAC. 1031 c041e9d2SJens Scharsig 1032 c041e9d2SJens Scharsig CONFIG_RMII 1033 c041e9d2SJens Scharsig Define this to use reduced MII inteface 1034 c041e9d2SJens Scharsig 1035 c041e9d2SJens Scharsig CONFIG_DRIVER_AT91EMAC_QUIET 1036 c041e9d2SJens Scharsig If this defined, the driver is quiet. 1037 c041e9d2SJens Scharsig The driver doen't show link status messages. 1038 c041e9d2SJens Scharsig 1039 efdd7319SRob Herring CONFIG_CALXEDA_XGMAC 1040 efdd7319SRob Herring Support for the Calxeda XGMAC device 1041 efdd7319SRob Herring 1042 45219c46Swdenk CONFIG_DRIVER_LAN91C96 1043 45219c46Swdenk Support for SMSC's LAN91C96 chips. 1044 45219c46Swdenk 1045 45219c46Swdenk CONFIG_LAN91C96_BASE 1046 45219c46Swdenk Define this to hold the physical address 1047 45219c46Swdenk of the LAN91C96's I/O space 1048 45219c46Swdenk 1049 45219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 1050 45219c46Swdenk Define this to enable 32 bit addressing 1051 45219c46Swdenk 1052 f39748aeSwdenk CONFIG_DRIVER_SMC91111 1053 f39748aeSwdenk Support for SMSC's LAN91C111 chip 1054 f39748aeSwdenk 1055 f39748aeSwdenk CONFIG_SMC91111_BASE 1056 f39748aeSwdenk Define this to hold the physical address 1057 f39748aeSwdenk of the device (I/O space) 1058 f39748aeSwdenk 1059 f39748aeSwdenk CONFIG_SMC_USE_32_BIT 1060 f39748aeSwdenk Define this if data bus is 32 bits 1061 f39748aeSwdenk 1062 f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 1063 f39748aeSwdenk Define this to use i/o functions instead of macros 1064 f39748aeSwdenk (some hardware wont work with macros) 1065 f39748aeSwdenk 1066 dc02badaSHeiko Schocher CONFIG_DRIVER_TI_EMAC 1067 dc02badaSHeiko Schocher Support for davinci emac 1068 dc02badaSHeiko Schocher 1069 dc02badaSHeiko Schocher CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 1070 dc02badaSHeiko Schocher Define this if you have more then 3 PHYs. 1071 dc02badaSHeiko Schocher 1072 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100 1073 b3dbf4a5SMacpaul Lin Support for Faraday's FTGMAC100 Gigabit SoC Ethernet 1074 b3dbf4a5SMacpaul Lin 1075 b3dbf4a5SMacpaul Lin CONFIG_FTGMAC100_EGIGA 1076 b3dbf4a5SMacpaul Lin Define this to use GE link update with gigabit PHY. 1077 b3dbf4a5SMacpaul Lin Define this if FTGMAC100 is connected to gigabit PHY. 1078 b3dbf4a5SMacpaul Lin If your system has 10/100 PHY only, it might not occur 1079 b3dbf4a5SMacpaul Lin wrong behavior. Because PHY usually return timeout or 1080 b3dbf4a5SMacpaul Lin useless data when polling gigabit status and gigabit 1081 b3dbf4a5SMacpaul Lin control registers. This behavior won't affect the 1082 b3dbf4a5SMacpaul Lin correctnessof 10/100 link speed update. 1083 b3dbf4a5SMacpaul Lin 1084 c2fff331SMike Rapoport CONFIG_SMC911X 1085 557b377dSJens Gehrlein Support for SMSC's LAN911x and LAN921x chips 1086 557b377dSJens Gehrlein 1087 c2fff331SMike Rapoport CONFIG_SMC911X_BASE 1088 557b377dSJens Gehrlein Define this to hold the physical address 1089 557b377dSJens Gehrlein of the device (I/O space) 1090 557b377dSJens Gehrlein 1091 c2fff331SMike Rapoport CONFIG_SMC911X_32_BIT 1092 557b377dSJens Gehrlein Define this if data bus is 32 bits 1093 557b377dSJens Gehrlein 1094 c2fff331SMike Rapoport CONFIG_SMC911X_16_BIT 1095 557b377dSJens Gehrlein Define this if data bus is 16 bits. If your processor 1096 557b377dSJens Gehrlein automatically converts one 32 bit word to two 16 bit 1097 c2fff331SMike Rapoport words you may also try CONFIG_SMC911X_32_BIT. 1098 557b377dSJens Gehrlein 1099 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER 1100 3d0075faSYoshihiro Shimoda Support for Renesas on-chip Ethernet controller 1101 3d0075faSYoshihiro Shimoda 1102 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_USE_PORT 1103 3d0075faSYoshihiro Shimoda Define the number of ports to be used 1104 3d0075faSYoshihiro Shimoda 1105 3d0075faSYoshihiro Shimoda CONFIG_SH_ETHER_PHY_ADDR 1106 3d0075faSYoshihiro Shimoda Define the ETH PHY's address 1107 3d0075faSYoshihiro Shimoda 1108 68260aabSYoshihiro Shimoda CONFIG_SH_ETHER_CACHE_WRITEBACK 1109 68260aabSYoshihiro Shimoda If this option is set, the driver enables cache flush. 1110 68260aabSYoshihiro Shimoda 1111 5e124724SVadim Bendebury- TPM Support: 1112 5e124724SVadim Bendebury CONFIG_GENERIC_LPC_TPM 1113 5e124724SVadim Bendebury Support for generic parallel port TPM devices. Only one device 1114 5e124724SVadim Bendebury per system is supported at this time. 1115 5e124724SVadim Bendebury 1116 5e124724SVadim Bendebury CONFIG_TPM_TIS_BASE_ADDRESS 1117 5e124724SVadim Bendebury Base address where the generic TPM device is mapped 1118 5e124724SVadim Bendebury to. Contemporary x86 systems usually map it at 1119 5e124724SVadim Bendebury 0xfed40000. 1120 5e124724SVadim Bendebury 1121 c609719bSwdenk- USB Support: 1122 c609719bSwdenk At the moment only the UHCI host controller is 1123 4d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 1124 c609719bSwdenk CONFIG_USB_UHCI to enable it. 1125 c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 1126 30d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 1127 c609719bSwdenk storage devices. 1128 c609719bSwdenk Note: 1129 c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 1130 c609719bSwdenk (TEAC FD-05PUB). 1131 4d13cbadSwdenk MPC5200 USB requires additional defines: 1132 4d13cbadSwdenk CONFIG_USB_CLOCK 1133 4d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 1134 307ecb6dSEric Millbrandt CONFIG_PSC3_USB 1135 307ecb6dSEric Millbrandt for USB on PSC3 1136 4d13cbadSwdenk CONFIG_USB_CONFIG 1137 4d13cbadSwdenk for differential drivers: 0x00001000 1138 4d13cbadSwdenk for single ended drivers: 0x00005000 1139 307ecb6dSEric Millbrandt for differential drivers on PSC3: 0x00000100 1140 307ecb6dSEric Millbrandt for single ended drivers on PSC3: 0x00004100 1141 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EVENT_POLL 1142 fdcfaa1bSZhang Wei May be defined to allow interrupt polling 1143 fdcfaa1bSZhang Wei instead of using asynchronous interrupts 1144 4d13cbadSwdenk 1145 16c8d5e7SWolfgang Denk- USB Device: 1146 16c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 1147 16c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 1148 16c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 1149 11ccc33fSMarcel Ziswiler attach your USB cable. The Unix command "dmesg" should print 1150 16c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 1151 16c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 1152 16c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 1153 16c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 1154 16c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 1155 16c8d5e7SWolfgang Denk a Linux host by 1156 16c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 1157 16c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 1158 16c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 1159 16c8d5e7SWolfgang Denk might be defined in YourBoardName.h 1160 16c8d5e7SWolfgang Denk 1161 16c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 1162 16c8d5e7SWolfgang Denk Define this to build a UDC device 1163 16c8d5e7SWolfgang Denk 1164 16c8d5e7SWolfgang Denk CONFIG_USB_TTY 1165 16c8d5e7SWolfgang Denk Define this to have a tty type of device available to 1166 16c8d5e7SWolfgang Denk talk to the UDC device 1167 16c8d5e7SWolfgang Denk 1168 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CONSOLE_IS_IN_ENV 1169 16c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 1170 16c8d5e7SWolfgang Denk be set to usbtty. 1171 16c8d5e7SWolfgang Denk 1172 16c8d5e7SWolfgang Denk mpc8xx: 1173 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_EXTC_CLK 0xBLAH 1174 16c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 1175 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_EXTC_CLK 0x02 1176 16c8d5e7SWolfgang Denk 1177 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_USB_BRG_CLK 0xBLAH 1178 16c8d5e7SWolfgang Denk Derive USB clock from brgclk 1179 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_USB_BRG_CLK 0x04 1180 16c8d5e7SWolfgang Denk 1181 16c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 1182 16c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 1183 16c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 1184 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 1185 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 1186 16c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 1187 16c8d5e7SWolfgang Denk 1188 16c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 1189 16c8d5e7SWolfgang Denk Define this string as the name of your company for 1190 16c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 1191 16c8d5e7SWolfgang Denk 1192 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 1193 16c8d5e7SWolfgang Denk Define this string as the name of your product 1194 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 1195 16c8d5e7SWolfgang Denk 1196 16c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 1197 16c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 1198 16c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 1199 16c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 1200 16c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 1201 16c8d5e7SWolfgang Denk 1202 16c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 1203 16c8d5e7SWolfgang Denk Define this as the unique Product ID 1204 16c8d5e7SWolfgang Denk for your device 1205 16c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 1206 c609719bSwdenk 1207 d70a560fSIgor Grinberg- ULPI Layer Support: 1208 d70a560fSIgor Grinberg The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via 1209 d70a560fSIgor Grinberg the generic ULPI layer. The generic layer accesses the ULPI PHY 1210 d70a560fSIgor Grinberg via the platform viewport, so you need both the genric layer and 1211 d70a560fSIgor Grinberg the viewport enabled. Currently only Chipidea/ARC based 1212 d70a560fSIgor Grinberg viewport is supported. 1213 d70a560fSIgor Grinberg To enable the ULPI layer support, define CONFIG_USB_ULPI and 1214 d70a560fSIgor Grinberg CONFIG_USB_ULPI_VIEWPORT in your board configuration file. 1215 c609719bSwdenk 1216 c609719bSwdenk- MMC Support: 1217 c609719bSwdenk The MMC controller on the Intel PXA is supported. To 1218 c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 1219 c609719bSwdenk accessed from the boot prompt by mapping the device 1220 c609719bSwdenk to physical memory similar to flash. Command line is 1221 602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 1222 602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 1223 c609719bSwdenk 1224 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF 1225 afb35666SYoshihiro Shimoda Support for Renesas on-chip MMCIF controller 1226 afb35666SYoshihiro Shimoda 1227 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_ADDR 1228 afb35666SYoshihiro Shimoda Define the base address of MMCIF registers 1229 afb35666SYoshihiro Shimoda 1230 afb35666SYoshihiro Shimoda CONFIG_SH_MMCIF_CLK 1231 afb35666SYoshihiro Shimoda Define the clock frequency for MMCIF 1232 afb35666SYoshihiro Shimoda 1233 6705d81eSwdenk- Journaling Flash filesystem support: 1234 6705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 1235 6705d81eSwdenk CONFIG_JFFS2_NAND_DEV 1236 6705d81eSwdenk Define these for a default partition on a NAND device 1237 6705d81eSwdenk 1238 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_SECTOR, 1239 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS 1240 6705d81eSwdenk Define these for a default partition on a NOR device 1241 6705d81eSwdenk 1242 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_JFFS_CUSTOM_PART 1243 6705d81eSwdenk Define this to create an own partition. You have to provide a 1244 6705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 1245 6705d81eSwdenk 1246 6705d81eSwdenk If you define only one JFFS2 partition you may also want to 1247 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_JFFS_SINGLE_PART 1 1248 6705d81eSwdenk to disable the command chpart. This is the default when you 1249 6705d81eSwdenk have not defined a custom partition 1250 6705d81eSwdenk 1251 c30a15e5SDonggeun Kim- FAT(File Allocation Table) filesystem write function support: 1252 c30a15e5SDonggeun Kim CONFIG_FAT_WRITE 1253 c30a15e5SDonggeun Kim Support for saving memory data as a file 1254 c30a15e5SDonggeun Kim in FAT formatted partition 1255 c30a15e5SDonggeun Kim 1256 c609719bSwdenk- Keyboard Support: 1257 c609719bSwdenk CONFIG_ISA_KEYBOARD 1258 c609719bSwdenk 1259 c609719bSwdenk Define this to enable standard (PC-Style) keyboard 1260 c609719bSwdenk support 1261 c609719bSwdenk 1262 c609719bSwdenk CONFIG_I8042_KBD 1263 c609719bSwdenk Standard PC keyboard driver with US (is default) and 1264 c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 1265 c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 1266 c609719bSwdenk for cfb_console. Supports cursor blinking. 1267 c609719bSwdenk 1268 c609719bSwdenk- Video support: 1269 c609719bSwdenk CONFIG_VIDEO 1270 c609719bSwdenk 1271 c609719bSwdenk Define this to enable video support (for output to 1272 c609719bSwdenk video). 1273 c609719bSwdenk 1274 c609719bSwdenk CONFIG_VIDEO_CT69000 1275 c609719bSwdenk 1276 c609719bSwdenk Enable Chips & Technologies 69000 Video chip 1277 c609719bSwdenk 1278 c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 1279 eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 1280 eeb1b77bSwdenk video output is selected via environment 'videoout' 1281 eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 1282 eeb1b77bSwdenk assumed. 1283 c609719bSwdenk 1284 eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 1285 11ccc33fSMarcel Ziswiler selected via environment 'videomode'. Two different ways 1286 eeb1b77bSwdenk are possible: 1287 eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 1288 eeb1b77bSwdenk Following standard modes are supported (* is default): 1289 eeb1b77bSwdenk 1290 eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 1291 eeb1b77bSwdenk -------------+--------------------------------------------- 1292 eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 1293 eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 1294 eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 1295 eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 1296 eeb1b77bSwdenk -------------+--------------------------------------------- 1297 c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 1298 c609719bSwdenk 1299 eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 1300 7817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 1301 eeb1b77bSwdenk 1302 eeb1b77bSwdenk 1303 a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 1304 a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 1305 a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 1306 a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 1307 a6c7ad2fSwdenk 1308 7d3053fbSTimur Tabi CONFIG_FSL_DIU_FB 1309 7d3053fbSTimur Tabi Enable the Freescale DIU video driver. Reference boards for 1310 7d3053fbSTimur Tabi SOCs that have a DIU should define this macro to enable DIU 1311 7d3053fbSTimur Tabi support, and should also define these other macros: 1312 7d3053fbSTimur Tabi 1313 7d3053fbSTimur Tabi CONFIG_SYS_DIU_ADDR 1314 7d3053fbSTimur Tabi CONFIG_VIDEO 1315 7d3053fbSTimur Tabi CONFIG_CMD_BMP 1316 7d3053fbSTimur Tabi CONFIG_CFB_CONSOLE 1317 7d3053fbSTimur Tabi CONFIG_VIDEO_SW_CURSOR 1318 7d3053fbSTimur Tabi CONFIG_VGA_AS_SINGLE_DEVICE 1319 7d3053fbSTimur Tabi CONFIG_VIDEO_LOGO 1320 7d3053fbSTimur Tabi CONFIG_VIDEO_BMP_LOGO 1321 7d3053fbSTimur Tabi 1322 ba8e76bdSTimur Tabi The DIU driver will look for the 'video-mode' environment 1323 ba8e76bdSTimur Tabi variable, and if defined, enable the DIU as a console during 1324 ba8e76bdSTimur Tabi boot. See the documentation file README.video for a 1325 ba8e76bdSTimur Tabi description of this variable. 1326 7d3053fbSTimur Tabi 1327 682011ffSwdenk- Keyboard Support: 1328 682011ffSwdenk CONFIG_KEYBOARD 1329 682011ffSwdenk 1330 682011ffSwdenk Define this to enable a custom keyboard support. 1331 682011ffSwdenk This simply calls drv_keyboard_init() which must be 1332 682011ffSwdenk defined in your board-specific files. 1333 682011ffSwdenk The only board using this so far is RBC823. 1334 a6c7ad2fSwdenk 1335 c609719bSwdenk- LCD Support: CONFIG_LCD 1336 c609719bSwdenk 1337 c609719bSwdenk Define this to enable LCD support (for output to LCD 1338 c609719bSwdenk display); also select one of the supported displays 1339 c609719bSwdenk by defining one of these: 1340 c609719bSwdenk 1341 39cf4804SStelian Pop CONFIG_ATMEL_LCD: 1342 39cf4804SStelian Pop 1343 39cf4804SStelian Pop HITACHI TX09D70VM1CCA, 3.5", 240x320. 1344 39cf4804SStelian Pop 1345 fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 1346 c609719bSwdenk 1347 fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 1348 c609719bSwdenk 1349 fd3103bbSwdenk CONFIG_NEC_NL6448BC20 1350 c609719bSwdenk 1351 fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 1352 fd3103bbSwdenk Active, color, single scan. 1353 fd3103bbSwdenk 1354 fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 1355 fd3103bbSwdenk 1356 fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 1357 c609719bSwdenk Active, color, single scan. 1358 c609719bSwdenk 1359 c609719bSwdenk CONFIG_SHARP_16x9 1360 c609719bSwdenk 1361 c609719bSwdenk Sharp 320x240. Active, color, single scan. 1362 c609719bSwdenk It isn't 16x9, and I am not sure what it is. 1363 c609719bSwdenk 1364 c609719bSwdenk CONFIG_SHARP_LQ64D341 1365 c609719bSwdenk 1366 c609719bSwdenk Sharp LQ64D341 display, 640x480. 1367 c609719bSwdenk Active, color, single scan. 1368 c609719bSwdenk 1369 c609719bSwdenk CONFIG_HLD1045 1370 c609719bSwdenk 1371 c609719bSwdenk HLD1045 display, 640x480. 1372 c609719bSwdenk Active, color, single scan. 1373 c609719bSwdenk 1374 c609719bSwdenk CONFIG_OPTREX_BW 1375 c609719bSwdenk 1376 c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1377 c609719bSwdenk or 1378 c609719bSwdenk Hitachi LMG6912RPFC-00T 1379 c609719bSwdenk or 1380 c609719bSwdenk Hitachi SP14Q002 1381 c609719bSwdenk 1382 c609719bSwdenk 320x240. Black & white. 1383 c609719bSwdenk 1384 c609719bSwdenk Normally display is black on white background; define 1385 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_WHITE_ON_BLACK to get it inverted. 1386 c609719bSwdenk 1387 7152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1388 d791b1dcSwdenk 1389 d791b1dcSwdenk If this option is set, the environment is checked for 1390 d791b1dcSwdenk a variable "splashimage". If found, the usual display 1391 d791b1dcSwdenk of logo, copyright and system information on the LCD 1392 e94d2cd9Swdenk is suppressed and the BMP image at the address 1393 d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1394 d791b1dcSwdenk console is redirected to the "nulldev", too. This 1395 d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1396 d791b1dcSwdenk loaded very quickly after power-on. 1397 d791b1dcSwdenk 1398 1ca298ceSMatthias Weisser CONFIG_SPLASH_SCREEN_ALIGN 1399 1ca298ceSMatthias Weisser 1400 1ca298ceSMatthias Weisser If this option is set the splash image can be freely positioned 1401 1ca298ceSMatthias Weisser on the screen. Environment variable "splashpos" specifies the 1402 1ca298ceSMatthias Weisser position as "x,y". If a positive number is given it is used as 1403 1ca298ceSMatthias Weisser number of pixel from left/top. If a negative number is given it 1404 1ca298ceSMatthias Weisser is used as number of pixel from right/bottom. You can also 1405 1ca298ceSMatthias Weisser specify 'm' for centering the image. 1406 1ca298ceSMatthias Weisser 1407 1ca298ceSMatthias Weisser Example: 1408 1ca298ceSMatthias Weisser setenv splashpos m,m 1409 1ca298ceSMatthias Weisser => image at center of screen 1410 1ca298ceSMatthias Weisser 1411 1ca298ceSMatthias Weisser setenv splashpos 30,20 1412 1ca298ceSMatthias Weisser => image at x = 30 and y = 20 1413 1ca298ceSMatthias Weisser 1414 1ca298ceSMatthias Weisser setenv splashpos -10,m 1415 1ca298ceSMatthias Weisser => vertically centered image 1416 1ca298ceSMatthias Weisser at x = dspWidth - bmpWidth - 9 1417 1ca298ceSMatthias Weisser 1418 98f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 1419 98f4a3dfSStefan Roese 1420 98f4a3dfSStefan Roese If this option is set, additionally to standard BMP 1421 98f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 1422 98f4a3dfSStefan Roese splashscreen support or the bmp command. 1423 98f4a3dfSStefan Roese 1424 d5011762SAnatolij Gustschin- Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 1425 d5011762SAnatolij Gustschin 1426 d5011762SAnatolij Gustschin If this option is set, 8-bit RLE compressed BMP images 1427 d5011762SAnatolij Gustschin can be displayed via the splashscreen support or the 1428 d5011762SAnatolij Gustschin bmp command. 1429 d5011762SAnatolij Gustschin 1430 c29fdfc1Swdenk- Compression support: 1431 c29fdfc1Swdenk CONFIG_BZIP2 1432 c29fdfc1Swdenk 1433 c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1434 c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1435 c29fdfc1Swdenk compressed images are supported. 1436 c29fdfc1Swdenk 1437 c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1438 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should 1439 c29fdfc1Swdenk be at least 4MB. 1440 d791b1dcSwdenk 1441 fc9c1727SLuigi 'Comio' Mantellini CONFIG_LZMA 1442 fc9c1727SLuigi 'Comio' Mantellini 1443 fc9c1727SLuigi 'Comio' Mantellini If this option is set, support for lzma compressed 1444 fc9c1727SLuigi 'Comio' Mantellini images is included. 1445 fc9c1727SLuigi 'Comio' Mantellini 1446 fc9c1727SLuigi 'Comio' Mantellini Note: The LZMA algorithm adds between 2 and 4KB of code and it 1447 fc9c1727SLuigi 'Comio' Mantellini requires an amount of dynamic memory that is given by the 1448 fc9c1727SLuigi 'Comio' Mantellini formula: 1449 fc9c1727SLuigi 'Comio' Mantellini 1450 fc9c1727SLuigi 'Comio' Mantellini (1846 + 768 << (lc + lp)) * sizeof(uint16) 1451 fc9c1727SLuigi 'Comio' Mantellini 1452 fc9c1727SLuigi 'Comio' Mantellini Where lc and lp stand for, respectively, Literal context bits 1453 fc9c1727SLuigi 'Comio' Mantellini and Literal pos bits. 1454 fc9c1727SLuigi 'Comio' Mantellini 1455 fc9c1727SLuigi 'Comio' Mantellini This value is upper-bounded by 14MB in the worst case. Anyway, 1456 fc9c1727SLuigi 'Comio' Mantellini for a ~4MB large kernel image, we have lc=3 and lp=0 for a 1457 fc9c1727SLuigi 'Comio' Mantellini total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is 1458 fc9c1727SLuigi 'Comio' Mantellini a very small buffer. 1459 fc9c1727SLuigi 'Comio' Mantellini 1460 fc9c1727SLuigi 'Comio' Mantellini Use the lzmainfo tool to determinate the lc and lp values and 1461 fc9c1727SLuigi 'Comio' Mantellini then calculate the amount of needed dynamic memory (ensuring 1462 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD the appropriate CONFIG_SYS_MALLOC_LEN value). 1463 fc9c1727SLuigi 'Comio' Mantellini 1464 17ea1177Swdenk- MII/PHY support: 1465 17ea1177Swdenk CONFIG_PHY_ADDR 1466 17ea1177Swdenk 1467 17ea1177Swdenk The address of PHY on MII bus. 1468 17ea1177Swdenk 1469 17ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 1470 17ea1177Swdenk 1471 17ea1177Swdenk The clock frequency of the MII bus 1472 17ea1177Swdenk 1473 17ea1177Swdenk CONFIG_PHY_GIGE 1474 17ea1177Swdenk 1475 17ea1177Swdenk If this option is set, support for speed/duplex 1476 11ccc33fSMarcel Ziswiler detection of gigabit PHY is included. 1477 17ea1177Swdenk 1478 17ea1177Swdenk CONFIG_PHY_RESET_DELAY 1479 17ea1177Swdenk 1480 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1481 17ea1177Swdenk reset before any MII register access is possible. 1482 17ea1177Swdenk For such PHY, set this option to the usec delay 1483 17ea1177Swdenk required. (minimum 300usec for LXT971A) 1484 17ea1177Swdenk 1485 17ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 1486 17ea1177Swdenk 1487 17ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 1488 17ea1177Swdenk command issued before MII status register can be read 1489 17ea1177Swdenk 1490 c609719bSwdenk- Ethernet address: 1491 c609719bSwdenk CONFIG_ETHADDR 1492 c68a05feSrichardretanubun CONFIG_ETH1ADDR 1493 c609719bSwdenk CONFIG_ETH2ADDR 1494 c609719bSwdenk CONFIG_ETH3ADDR 1495 c68a05feSrichardretanubun CONFIG_ETH4ADDR 1496 c68a05feSrichardretanubun CONFIG_ETH5ADDR 1497 c609719bSwdenk 1498 11ccc33fSMarcel Ziswiler Define a default value for Ethernet address to use 1499 11ccc33fSMarcel Ziswiler for the respective Ethernet interface, in case this 1500 c609719bSwdenk is not determined automatically. 1501 c609719bSwdenk 1502 c609719bSwdenk- IP address: 1503 c609719bSwdenk CONFIG_IPADDR 1504 c609719bSwdenk 1505 c609719bSwdenk Define a default value for the IP address to use for 1506 11ccc33fSMarcel Ziswiler the default Ethernet interface, in case this is not 1507 c609719bSwdenk determined through e.g. bootp. 1508 1ebcd654SWolfgang Denk (Environment variable "ipaddr") 1509 c609719bSwdenk 1510 c609719bSwdenk- Server IP address: 1511 c609719bSwdenk CONFIG_SERVERIP 1512 c609719bSwdenk 1513 c609719bSwdenk Defines a default value for the IP address of a TFTP 1514 c609719bSwdenk server to contact when using the "tftboot" command. 1515 1ebcd654SWolfgang Denk (Environment variable "serverip") 1516 c609719bSwdenk 1517 97cfe861SRobin Getz CONFIG_KEEP_SERVERADDR 1518 97cfe861SRobin Getz 1519 97cfe861SRobin Getz Keeps the server's MAC address, in the env 'serveraddr' 1520 97cfe861SRobin Getz for passing to bootargs (like Linux's netconsole option) 1521 97cfe861SRobin Getz 1522 1ebcd654SWolfgang Denk- Gateway IP address: 1523 1ebcd654SWolfgang Denk CONFIG_GATEWAYIP 1524 1ebcd654SWolfgang Denk 1525 1ebcd654SWolfgang Denk Defines a default value for the IP address of the 1526 1ebcd654SWolfgang Denk default router where packets to other networks are 1527 1ebcd654SWolfgang Denk sent to. 1528 1ebcd654SWolfgang Denk (Environment variable "gatewayip") 1529 1ebcd654SWolfgang Denk 1530 1ebcd654SWolfgang Denk- Subnet mask: 1531 1ebcd654SWolfgang Denk CONFIG_NETMASK 1532 1ebcd654SWolfgang Denk 1533 1ebcd654SWolfgang Denk Defines a default value for the subnet mask (or 1534 1ebcd654SWolfgang Denk routing prefix) which is used to determine if an IP 1535 1ebcd654SWolfgang Denk address belongs to the local subnet or needs to be 1536 1ebcd654SWolfgang Denk forwarded through a router. 1537 1ebcd654SWolfgang Denk (Environment variable "netmask") 1538 1ebcd654SWolfgang Denk 1539 53a5c424SDavid Updegraff- Multicast TFTP Mode: 1540 53a5c424SDavid Updegraff CONFIG_MCAST_TFTP 1541 53a5c424SDavid Updegraff 1542 53a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 1543 53a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 1544 11ccc33fSMarcel Ziswiler tftp down the same boot image concurrently. Note: the Ethernet 1545 53a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 1546 53a5c424SDavid Updegraff multicast group. 1547 53a5c424SDavid Updegraff 1548 c609719bSwdenk- BOOTP Recovery Mode: 1549 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1550 c609719bSwdenk 1551 c609719bSwdenk If you have many targets in a network that try to 1552 c609719bSwdenk boot using BOOTP, you may want to avoid that all 1553 c609719bSwdenk systems send out BOOTP requests at precisely the same 1554 c609719bSwdenk moment (which would happen for instance at recovery 1555 c609719bSwdenk from a power failure, when all systems will try to 1556 c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1557 c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1558 c609719bSwdenk inserted before sending out BOOTP requests. The 1559 6c33c785SWolfgang Denk following delays are inserted then: 1560 c609719bSwdenk 1561 c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1562 c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1563 c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1564 c609719bSwdenk 4th and following 1565 c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1566 c609719bSwdenk 1567 fe389a82Sstroese- DHCP Advanced Options: 1568 1fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 1569 1fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1570 fe389a82Sstroese 1571 1fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 1572 1fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 1573 1fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 1574 1fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 1575 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 1576 1fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 1577 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS 1578 1fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 1579 1fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 1580 1fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 1581 1fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 1582 1fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1583 fe389a82Sstroese 1584 5d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 1585 5d110f0aSWilson Callan environment variable, not the BOOTP server. 1586 fe389a82Sstroese 1587 fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1588 fe389a82Sstroese serverip from a DHCP server, it is possible that more 1589 fe389a82Sstroese than one DNS serverip is offered to the client. 1590 fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1591 fe389a82Sstroese serverip will be stored in the additional environment 1592 fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1593 fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 1594 1fe80d79SJon Loeliger is defined. 1595 fe389a82Sstroese 1596 fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1597 fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1598 fe389a82Sstroese need the hostname of the DHCP requester. 1599 5d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 1600 1fe80d79SJon Loeliger of the "hostname" environment variable is passed as 1601 1fe80d79SJon Loeliger option 12 to the DHCP server. 1602 fe389a82Sstroese 1603 d9a2f416SAras Vaichas CONFIG_BOOTP_DHCP_REQUEST_DELAY 1604 d9a2f416SAras Vaichas 1605 d9a2f416SAras Vaichas A 32bit value in microseconds for a delay between 1606 d9a2f416SAras Vaichas receiving a "DHCP Offer" and sending the "DHCP Request". 1607 d9a2f416SAras Vaichas This fixes a problem with certain DHCP servers that don't 1608 d9a2f416SAras Vaichas respond 100% of the time to a "DHCP request". E.g. On an 1609 d9a2f416SAras Vaichas AT91RM9200 processor running at 180MHz, this delay needed 1610 d9a2f416SAras Vaichas to be *at least* 15,000 usec before a Windows Server 2003 1611 d9a2f416SAras Vaichas DHCP server would reply 100% of the time. I recommend at 1612 d9a2f416SAras Vaichas least 50,000 usec to be safe. The alternative is to hope 1613 d9a2f416SAras Vaichas that one of the retries will be successful but note that 1614 d9a2f416SAras Vaichas the DHCP timeout and retry process takes a longer than 1615 d9a2f416SAras Vaichas this delay. 1616 d9a2f416SAras Vaichas 1617 a3d991bdSwdenk - CDP Options: 1618 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1619 a3d991bdSwdenk 1620 a3d991bdSwdenk The device id used in CDP trigger frames. 1621 a3d991bdSwdenk 1622 a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1623 a3d991bdSwdenk 1624 a3d991bdSwdenk A two character string which is prefixed to the MAC address 1625 a3d991bdSwdenk of the device. 1626 a3d991bdSwdenk 1627 a3d991bdSwdenk CONFIG_CDP_PORT_ID 1628 a3d991bdSwdenk 1629 a3d991bdSwdenk A printf format string which contains the ascii name of 1630 a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1631 11ccc33fSMarcel Ziswiler eth0 for the first Ethernet, eth1 for the second etc. 1632 a3d991bdSwdenk 1633 a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1634 a3d991bdSwdenk 1635 a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1636 a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1637 a3d991bdSwdenk 1638 a3d991bdSwdenk CONFIG_CDP_VERSION 1639 a3d991bdSwdenk 1640 a3d991bdSwdenk An ascii string containing the version of the software. 1641 a3d991bdSwdenk 1642 a3d991bdSwdenk CONFIG_CDP_PLATFORM 1643 a3d991bdSwdenk 1644 a3d991bdSwdenk An ascii string containing the name of the platform. 1645 a3d991bdSwdenk 1646 a3d991bdSwdenk CONFIG_CDP_TRIGGER 1647 a3d991bdSwdenk 1648 a3d991bdSwdenk A 32bit integer sent on the trigger. 1649 a3d991bdSwdenk 1650 a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1651 a3d991bdSwdenk 1652 a3d991bdSwdenk A 16bit integer containing the power consumption of the 1653 a3d991bdSwdenk device in .1 of milliwatts. 1654 a3d991bdSwdenk 1655 a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1656 a3d991bdSwdenk 1657 a3d991bdSwdenk A byte containing the id of the VLAN. 1658 a3d991bdSwdenk 1659 c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1660 c609719bSwdenk 1661 c609719bSwdenk Several configurations allow to display the current 1662 c609719bSwdenk status using a LED. For instance, the LED will blink 1663 c609719bSwdenk fast while running U-Boot code, stop blinking as 1664 c609719bSwdenk soon as a reply to a BOOTP request was received, and 1665 c609719bSwdenk start blinking slow once the Linux kernel is running 1666 c609719bSwdenk (supported by a status LED driver in the Linux 1667 c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1668 c609719bSwdenk feature in U-Boot. 1669 c609719bSwdenk 1670 c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1671 c609719bSwdenk 1672 c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1673 c609719bSwdenk on those systems that support this (optional) 1674 c609719bSwdenk feature, like the TQM8xxL modules. 1675 c609719bSwdenk 1676 c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1677 c609719bSwdenk 1678 b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1679 b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1680 11ccc33fSMarcel Ziswiler include the appropriate I2C driver for the selected CPU. 1681 c609719bSwdenk 1682 b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1683 602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1684 b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1685 b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1686 c609719bSwdenk command line interface. 1687 c609719bSwdenk 1688 bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1689 c609719bSwdenk 1690 b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1691 b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1692 b37c7e5eSwdenk support for I2C. 1693 c609719bSwdenk 1694 b37c7e5eSwdenk There are several other quantities that must also be 1695 b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1696 c609719bSwdenk 1697 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD In both cases you will need to define CONFIG_SYS_I2C_SPEED 1698 b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1699 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie 1700 11ccc33fSMarcel Ziswiler the CPU's i2c node address). 1701 c609719bSwdenk 1702 8d321b81SPeter Tyser Now, the u-boot i2c code for the mpc8xx 1703 a47a12beSStefan Roese (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node 1704 8d321b81SPeter Tyser and so its address should therefore be cleared to 0 (See, 1705 8d321b81SPeter Tyser eg, MPC823e User's Manual p.16-473). So, set 1706 8d321b81SPeter Tyser CONFIG_SYS_I2C_SLAVE to 0. 1707 b37c7e5eSwdenk 1708 5da71efaSEric Millbrandt CONFIG_SYS_I2C_INIT_MPC5XXX 1709 5da71efaSEric Millbrandt 1710 5da71efaSEric Millbrandt When a board is reset during an i2c bus transfer 1711 5da71efaSEric Millbrandt chips might think that the current transfer is still 1712 5da71efaSEric Millbrandt in progress. Reset the slave devices by sending start 1713 5da71efaSEric Millbrandt commands until the slave device responds. 1714 5da71efaSEric Millbrandt 1715 b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1716 b37c7e5eSwdenk 1717 b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1718 b37c7e5eSwdenk then the following macros need to be defined (examples are 1719 b37c7e5eSwdenk from include/configs/lwmon.h): 1720 c609719bSwdenk 1721 c609719bSwdenk I2C_INIT 1722 c609719bSwdenk 1723 b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1724 c609719bSwdenk controller or configure ports. 1725 c609719bSwdenk 1726 b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1727 b37c7e5eSwdenk 1728 c609719bSwdenk I2C_PORT 1729 c609719bSwdenk 1730 c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1731 c609719bSwdenk assumes both bits are on the same port). Valid values 1732 c609719bSwdenk are 0..3 for ports A..D. 1733 c609719bSwdenk 1734 c609719bSwdenk I2C_ACTIVE 1735 c609719bSwdenk 1736 c609719bSwdenk The code necessary to make the I2C data line active 1737 c609719bSwdenk (driven). If the data line is open collector, this 1738 c609719bSwdenk define can be null. 1739 c609719bSwdenk 1740 b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1741 b37c7e5eSwdenk 1742 c609719bSwdenk I2C_TRISTATE 1743 c609719bSwdenk 1744 c609719bSwdenk The code necessary to make the I2C data line tri-stated 1745 c609719bSwdenk (inactive). If the data line is open collector, this 1746 c609719bSwdenk define can be null. 1747 c609719bSwdenk 1748 b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1749 b37c7e5eSwdenk 1750 c609719bSwdenk I2C_READ 1751 c609719bSwdenk 1752 c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1753 c609719bSwdenk FALSE if it is low. 1754 c609719bSwdenk 1755 b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1756 b37c7e5eSwdenk 1757 c609719bSwdenk I2C_SDA(bit) 1758 c609719bSwdenk 1759 c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1760 c609719bSwdenk is FALSE, it clears it (low). 1761 c609719bSwdenk 1762 b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1763 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1764 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1765 b37c7e5eSwdenk 1766 c609719bSwdenk I2C_SCL(bit) 1767 c609719bSwdenk 1768 c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1769 c609719bSwdenk is FALSE, it clears it (low). 1770 c609719bSwdenk 1771 b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1772 b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1773 b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1774 b37c7e5eSwdenk 1775 c609719bSwdenk I2C_DELAY 1776 c609719bSwdenk 1777 c609719bSwdenk This delay is invoked four times per clock cycle so this 1778 c609719bSwdenk controls the rate of data transfer. The data rate thus 1779 b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1780 b37c7e5eSwdenk like: 1781 b37c7e5eSwdenk 1782 b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1783 c609719bSwdenk 1784 793b5726SMike Frysinger CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA 1785 793b5726SMike Frysinger 1786 793b5726SMike Frysinger If your arch supports the generic GPIO framework (asm/gpio.h), 1787 793b5726SMike Frysinger then you may alternatively define the two GPIOs that are to be 1788 793b5726SMike Frysinger used as SCL / SDA. Any of the previous I2C_xxx macros will 1789 793b5726SMike Frysinger have GPIO-based defaults assigned to them as appropriate. 1790 793b5726SMike Frysinger 1791 793b5726SMike Frysinger You should define these to the GPIO value as given directly to 1792 793b5726SMike Frysinger the generic GPIO functions. 1793 793b5726SMike Frysinger 1794 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_INIT_BOARD 1795 47cd00faSwdenk 1796 47cd00faSwdenk When a board is reset during an i2c bus transfer 1797 47cd00faSwdenk chips might think that the current transfer is still 1798 47cd00faSwdenk in progress. On some boards it is possible to access 1799 47cd00faSwdenk the i2c SCLK line directly, either by using the 1800 47cd00faSwdenk processor pin as a GPIO or by having a second pin 1801 47cd00faSwdenk connected to the bus. If this option is defined a 1802 47cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 1803 47cd00faSwdenk is run early in the boot sequence. 1804 47cd00faSwdenk 1805 26a33504SRichard Retanubun CONFIG_SYS_I2C_BOARD_LATE_INIT 1806 26a33504SRichard Retanubun 1807 26a33504SRichard Retanubun An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is 1808 26a33504SRichard Retanubun defined a custom i2c_board_late_init() routine in 1809 26a33504SRichard Retanubun boards/xxx/board.c is run AFTER the operations in i2c_init() 1810 26a33504SRichard Retanubun is completed. This callpoint can be used to unreset i2c bus 1811 26a33504SRichard Retanubun using CPU i2c controller register accesses for CPUs whose i2c 1812 26a33504SRichard Retanubun controller provide such a method. It is called at the end of 1813 26a33504SRichard Retanubun i2c_init() to allow i2c_init operations to setup the i2c bus 1814 26a33504SRichard Retanubun controller on the CPU (e.g. setting bus speed & slave address). 1815 26a33504SRichard Retanubun 1816 17ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 1817 17ea1177Swdenk 1818 17ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 1819 17ea1177Swdenk in u-boot bd_info structure based on u-boot environment 1820 17ea1177Swdenk variable "i2cfast". (see also i2cfast) 1821 17ea1177Swdenk 1822 bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1823 bb99ad6dSBen Warren 1824 bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1825 bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1826 bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1827 bb99ad6dSBen Warren Note that bus numbering is zero-based. 1828 bb99ad6dSBen Warren 1829 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_NOPROBES 1830 bb99ad6dSBen Warren 1831 bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1832 0f89c54bSPeter Tyser when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS 1833 0f89c54bSPeter Tyser is set, specify a list of bus-device pairs. Otherwise, specify 1834 0f89c54bSPeter Tyser a 1D array of device addresses 1835 bb99ad6dSBen Warren 1836 bb99ad6dSBen Warren e.g. 1837 bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1838 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} 1839 bb99ad6dSBen Warren 1840 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1841 bb99ad6dSBen Warren 1842 bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1843 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1844 bb99ad6dSBen Warren 1845 bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1846 bb99ad6dSBen Warren 1847 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SPD_BUS_NUM 1848 be5e6181STimur Tabi 1849 be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1850 be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1851 be5e6181STimur Tabi 1852 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_RTC_BUS_NUM 1853 0dc018ecSStefan Roese 1854 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 1855 0dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 1856 0dc018ecSStefan Roese 1857 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_DTT_BUS_NUM 1858 0dc018ecSStefan Roese 1859 0dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 1860 0dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 1861 0dc018ecSStefan Roese 1862 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_I2C_DTT_ADDR: 1863 9ebbb54fSVictor Gallardo 1864 9ebbb54fSVictor Gallardo If defined, specifies the I2C address of the DTT device. 1865 9ebbb54fSVictor Gallardo If not defined, then U-Boot uses predefined value for 1866 9ebbb54fSVictor Gallardo specified DTT device. 1867 9ebbb54fSVictor Gallardo 1868 be5e6181STimur Tabi CONFIG_FSL_I2C 1869 be5e6181STimur Tabi 1870 be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 1871 7817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1872 be5e6181STimur Tabi 1873 67b23a32SHeiko Schocher CONFIG_I2C_MUX 1874 67b23a32SHeiko Schocher 1875 67b23a32SHeiko Schocher Define this option if you have I2C devices reached over 1 .. n 1876 67b23a32SHeiko Schocher I2C Muxes like the pca9544a. This option addes a new I2C 1877 67b23a32SHeiko Schocher Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a 1878 67b23a32SHeiko Schocher new I2C Bus to the existing I2C Busses. If you select the 1879 67b23a32SHeiko Schocher new Bus with "i2c dev", u-bbot sends first the commandos for 1880 67b23a32SHeiko Schocher the muxes to activate this new "bus". 1881 67b23a32SHeiko Schocher 1882 67b23a32SHeiko Schocher CONFIG_I2C_MULTI_BUS must be also defined, to use this 1883 67b23a32SHeiko Schocher feature! 1884 67b23a32SHeiko Schocher 1885 67b23a32SHeiko Schocher Example: 1886 67b23a32SHeiko Schocher Adding a new I2C Bus reached over 2 pca9544a muxes 1887 67b23a32SHeiko Schocher The First mux with address 70 and channel 6 1888 67b23a32SHeiko Schocher The Second mux with address 71 and channel 4 1889 67b23a32SHeiko Schocher 1890 67b23a32SHeiko Schocher => i2c bus pca9544a:70:6:pca9544a:71:4 1891 67b23a32SHeiko Schocher 1892 67b23a32SHeiko Schocher Use the "i2c bus" command without parameter, to get a list 1893 67b23a32SHeiko Schocher of I2C Busses with muxes: 1894 67b23a32SHeiko Schocher 1895 67b23a32SHeiko Schocher => i2c bus 1896 67b23a32SHeiko Schocher Busses reached over muxes: 1897 67b23a32SHeiko Schocher Bus ID: 2 1898 67b23a32SHeiko Schocher reached over Mux(es): 1899 67b23a32SHeiko Schocher pca9544a@70 ch: 4 1900 67b23a32SHeiko Schocher Bus ID: 3 1901 67b23a32SHeiko Schocher reached over Mux(es): 1902 67b23a32SHeiko Schocher pca9544a@70 ch: 6 1903 67b23a32SHeiko Schocher pca9544a@71 ch: 4 1904 67b23a32SHeiko Schocher => 1905 67b23a32SHeiko Schocher 1906 67b23a32SHeiko Schocher If you now switch to the new I2C Bus 3 with "i2c dev 3" 1907 f9a78b8dSMichael Jones u-boot first sends the command to the mux@70 to enable 1908 f9a78b8dSMichael Jones channel 6, and then the command to the mux@71 to enable 1909 67b23a32SHeiko Schocher the channel 4. 1910 67b23a32SHeiko Schocher 1911 67b23a32SHeiko Schocher After that, you can use the "normal" i2c commands as 1912 f9a78b8dSMichael Jones usual to communicate with your I2C devices behind 1913 67b23a32SHeiko Schocher the 2 muxes. 1914 67b23a32SHeiko Schocher 1915 67b23a32SHeiko Schocher This option is actually implemented for the bitbanging 1916 67b23a32SHeiko Schocher algorithm in common/soft_i2c.c and for the Hardware I2C 1917 67b23a32SHeiko Schocher Bus on the MPC8260. But it should be not so difficult 1918 67b23a32SHeiko Schocher to add this option to other architectures. 1919 67b23a32SHeiko Schocher 1920 2ac6985aSAndrew Dyer CONFIG_SOFT_I2C_READ_REPEATED_START 1921 2ac6985aSAndrew Dyer 1922 2ac6985aSAndrew Dyer defining this will force the i2c_read() function in 1923 2ac6985aSAndrew Dyer the soft_i2c driver to perform an I2C repeated start 1924 2ac6985aSAndrew Dyer between writing the address pointer and reading the 1925 2ac6985aSAndrew Dyer data. If this define is omitted the default behaviour 1926 2ac6985aSAndrew Dyer of doing a stop-start sequence will be used. Most I2C 1927 2ac6985aSAndrew Dyer devices can use either method, but some require one or 1928 2ac6985aSAndrew Dyer the other. 1929 be5e6181STimur Tabi 1930 c609719bSwdenk- SPI Support: CONFIG_SPI 1931 c609719bSwdenk 1932 c609719bSwdenk Enables SPI driver (so far only tested with 1933 c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1934 c609719bSwdenk D/As on the SACSng board) 1935 c609719bSwdenk 1936 6639562eSYoshihiro Shimoda CONFIG_SH_SPI 1937 6639562eSYoshihiro Shimoda 1938 6639562eSYoshihiro Shimoda Enables the driver for SPI controller on SuperH. Currently 1939 6639562eSYoshihiro Shimoda only SH7757 is supported. 1940 6639562eSYoshihiro Shimoda 1941 c609719bSwdenk CONFIG_SPI_X 1942 c609719bSwdenk 1943 c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1944 c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1945 c609719bSwdenk 1946 c609719bSwdenk CONFIG_SOFT_SPI 1947 c609719bSwdenk 1948 c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1949 c609719bSwdenk using hardware support. This is a general purpose 1950 c609719bSwdenk driver that only requires three general I/O port pins 1951 c609719bSwdenk (two outputs, one input) to function. If this is 1952 c609719bSwdenk defined, the board configuration must define several 1953 c609719bSwdenk SPI configuration items (port pins to use, etc). For 1954 c609719bSwdenk an example, see include/configs/sacsng.h. 1955 c609719bSwdenk 1956 04a9e118SBen Warren CONFIG_HARD_SPI 1957 04a9e118SBen Warren 1958 04a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 1959 04a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 1960 04a9e118SBen Warren must define a list of chip-select function pointers. 1961 04a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 1962 04a9e118SBen Warren example, see include/configs/mpc8349emds.h. 1963 04a9e118SBen Warren 1964 38254f45SGuennadi Liakhovetski CONFIG_MXC_SPI 1965 38254f45SGuennadi Liakhovetski 1966 38254f45SGuennadi Liakhovetski Enables the driver for the SPI controllers on i.MX and MXC 1967 2e3cd1cdSFabio Estevam SoCs. Currently i.MX31/35/51 are supported. 1968 38254f45SGuennadi Liakhovetski 1969 0133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 1970 0133502eSMatthias Fuchs 1971 0133502eSMatthias Fuchs Enables FPGA subsystem. 1972 0133502eSMatthias Fuchs 1973 0133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 1974 0133502eSMatthias Fuchs 1975 0133502eSMatthias Fuchs Enables support for specific chip vendors. 1976 0133502eSMatthias Fuchs (ALTERA, XILINX) 1977 0133502eSMatthias Fuchs 1978 0133502eSMatthias Fuchs CONFIG_FPGA_<family> 1979 0133502eSMatthias Fuchs 1980 0133502eSMatthias Fuchs Enables support for FPGA family. 1981 0133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 1982 0133502eSMatthias Fuchs 1983 0133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1984 c609719bSwdenk 1985 c609719bSwdenk Specify the number of FPGA devices to support. 1986 c609719bSwdenk 1987 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_PROG_FEEDBACK 1988 c609719bSwdenk 1989 c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1990 c609719bSwdenk 1991 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_BUSY 1992 c609719bSwdenk 1993 c609719bSwdenk Enable checks on FPGA configuration interface busy 1994 c609719bSwdenk status by the configuration function. This option 1995 c609719bSwdenk will require a board or device specific function to 1996 c609719bSwdenk be written. 1997 c609719bSwdenk 1998 c609719bSwdenk CONFIG_FPGA_DELAY 1999 c609719bSwdenk 2000 c609719bSwdenk If defined, a function that provides delays in the FPGA 2001 c609719bSwdenk configuration driver. 2002 c609719bSwdenk 2003 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_CTRLC 2004 c609719bSwdenk Allow Control-C to interrupt FPGA configuration 2005 c609719bSwdenk 2006 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_CHECK_ERROR 2007 c609719bSwdenk 2008 c609719bSwdenk Check for configuration errors during FPGA bitfile 2009 c609719bSwdenk loading. For example, abort during Virtex II 2010 c609719bSwdenk configuration if the INIT_B line goes low (which 2011 c609719bSwdenk indicated a CRC error). 2012 c609719bSwdenk 2013 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_INIT 2014 c609719bSwdenk 2015 c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 2016 c609719bSwdenk after PROB_B has been deasserted during a Virtex II 2017 c609719bSwdenk FPGA configuration sequence. The default time is 500 2018 11ccc33fSMarcel Ziswiler ms. 2019 c609719bSwdenk 2020 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_BUSY 2021 c609719bSwdenk 2022 c609719bSwdenk Maximum time to wait for BUSY to deassert during 2023 11ccc33fSMarcel Ziswiler Virtex II FPGA configuration. The default is 5 ms. 2024 c609719bSwdenk 2025 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FPGA_WAIT_CONFIG 2026 c609719bSwdenk 2027 c609719bSwdenk Time to wait after FPGA configuration. The default is 2028 11ccc33fSMarcel Ziswiler 200 ms. 2029 c609719bSwdenk 2030 c609719bSwdenk- Configuration Management: 2031 c609719bSwdenk CONFIG_IDENT_STRING 2032 c609719bSwdenk 2033 c609719bSwdenk If defined, this string will be added to the U-Boot 2034 c609719bSwdenk version information (U_BOOT_VERSION) 2035 c609719bSwdenk 2036 c609719bSwdenk- Vendor Parameter Protection: 2037 c609719bSwdenk 2038 c609719bSwdenk U-Boot considers the values of the environment 2039 c609719bSwdenk variables "serial#" (Board Serial Number) and 2040 7152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 2041 c609719bSwdenk are set once by the board vendor / manufacturer, and 2042 c609719bSwdenk protects these variables from casual modification by 2043 c609719bSwdenk the user. Once set, these variables are read-only, 2044 c609719bSwdenk and write or delete attempts are rejected. You can 2045 11ccc33fSMarcel Ziswiler change this behaviour: 2046 c609719bSwdenk 2047 c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 2048 c609719bSwdenk file, the write protection for vendor parameters is 2049 47cd00faSwdenk completely disabled. Anybody can change or delete 2050 c609719bSwdenk these parameters. 2051 c609719bSwdenk 2052 c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 2053 c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 2054 11ccc33fSMarcel Ziswiler Ethernet address is installed in the environment, 2055 c609719bSwdenk which can be changed exactly ONCE by the user. [The 2056 c609719bSwdenk serial# is unaffected by this, i. e. it remains 2057 c609719bSwdenk read-only.] 2058 c609719bSwdenk 2059 c609719bSwdenk- Protected RAM: 2060 c609719bSwdenk CONFIG_PRAM 2061 c609719bSwdenk 2062 c609719bSwdenk Define this variable to enable the reservation of 2063 c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 2064 c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 2065 c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 2066 c609719bSwdenk this default value by defining an environment 2067 c609719bSwdenk variable "pram" to the number of kB you want to 2068 c609719bSwdenk reserve. Note that the board info structure will 2069 c609719bSwdenk still show the full amount of RAM. If pRAM is 2070 c609719bSwdenk reserved, a new environment variable "mem" will 2071 c609719bSwdenk automatically be defined to hold the amount of 2072 c609719bSwdenk remaining RAM in a form that can be passed as boot 2073 c609719bSwdenk argument to Linux, for instance like that: 2074 c609719bSwdenk 2075 fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 2076 c609719bSwdenk saveenv 2077 c609719bSwdenk 2078 c609719bSwdenk This way you can tell Linux not to use this memory, 2079 c609719bSwdenk either, which results in a memory region that will 2080 c609719bSwdenk not be affected by reboots. 2081 c609719bSwdenk 2082 c609719bSwdenk *WARNING* If your board configuration uses automatic 2083 c609719bSwdenk detection of the RAM size, you must make sure that 2084 c609719bSwdenk this memory test is non-destructive. So far, the 2085 c609719bSwdenk following board configurations are known to be 2086 c609719bSwdenk "pRAM-clean": 2087 c609719bSwdenk 2088 c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 2089 c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 2090 544d97e9SWolfgang Denk FLAGADM, TQM8260 2091 c609719bSwdenk 2092 c609719bSwdenk- Error Recovery: 2093 c609719bSwdenk CONFIG_PANIC_HANG 2094 c609719bSwdenk 2095 c609719bSwdenk Define this variable to stop the system in case of a 2096 c609719bSwdenk fatal error, so that you have to reset it manually. 2097 c609719bSwdenk This is probably NOT a good idea for an embedded 2098 11ccc33fSMarcel Ziswiler system where you want the system to reboot 2099 c609719bSwdenk automatically as fast as possible, but it may be 2100 c609719bSwdenk useful during development since you can try to debug 2101 c609719bSwdenk the conditions that lead to the situation. 2102 c609719bSwdenk 2103 c609719bSwdenk CONFIG_NET_RETRY_COUNT 2104 c609719bSwdenk 2105 c609719bSwdenk This variable defines the number of retries for 2106 c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 2107 c609719bSwdenk before giving up the operation. If not defined, a 2108 c609719bSwdenk default value of 5 is used. 2109 c609719bSwdenk 2110 40cb90eeSGuennadi Liakhovetski CONFIG_ARP_TIMEOUT 2111 40cb90eeSGuennadi Liakhovetski 2112 40cb90eeSGuennadi Liakhovetski Timeout waiting for an ARP reply in milliseconds. 2113 40cb90eeSGuennadi Liakhovetski 2114 c609719bSwdenk- Command Interpreter: 2115 8078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 2116 04a85b3bSwdenk 2117 04a85b3bSwdenk Enable auto completion of commands using TAB. 2118 04a85b3bSwdenk 2119 8078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 2120 8078f1a5SWolfgang Denk for the "hush" shell. 2121 8078f1a5SWolfgang Denk 2122 8078f1a5SWolfgang Denk 2123 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_HUSH_PARSER 2124 c609719bSwdenk 2125 c609719bSwdenk Define this variable to enable the "hush" shell (from 2126 c609719bSwdenk Busybox) as command line interpreter, thus enabling 2127 c609719bSwdenk powerful command line syntax like 2128 c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 2129 c609719bSwdenk constructs ("shell scripts"). 2130 c609719bSwdenk 2131 c609719bSwdenk If undefined, you get the old, much simpler behaviour 2132 c609719bSwdenk with a somewhat smaller memory footprint. 2133 c609719bSwdenk 2134 c609719bSwdenk 2135 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PROMPT_HUSH_PS2 2136 c609719bSwdenk 2137 c609719bSwdenk This defines the secondary prompt string, which is 2138 c609719bSwdenk printed when the command interpreter needs more input 2139 c609719bSwdenk to complete a command. Usually "> ". 2140 c609719bSwdenk 2141 c609719bSwdenk Note: 2142 c609719bSwdenk 2143 c609719bSwdenk In the current implementation, the local variables 2144 c609719bSwdenk space and global environment variables space are 2145 c609719bSwdenk separated. Local variables are those you define by 2146 3b57fe0aSwdenk simply typing `name=value'. To access a local 2147 c609719bSwdenk variable later on, you have write `$name' or 2148 3b57fe0aSwdenk `${name}'; to execute the contents of a variable 2149 3b57fe0aSwdenk directly type `$name' at the command prompt. 2150 c609719bSwdenk 2151 c609719bSwdenk Global environment variables are those you use 2152 c609719bSwdenk setenv/printenv to work with. To run a command stored 2153 c609719bSwdenk in such a variable, you need to use the run command, 2154 c609719bSwdenk and you must not use the '$' sign to access them. 2155 c609719bSwdenk 2156 c609719bSwdenk To store commands and special characters in a 2157 c609719bSwdenk variable, please use double quotation marks 2158 c609719bSwdenk surrounding the whole text of the variable, instead 2159 c609719bSwdenk of the backslashes before semicolons and special 2160 c609719bSwdenk symbols. 2161 c609719bSwdenk 2162 aa0c71acSWolfgang Denk- Commandline Editing and History: 2163 aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 2164 aa0c71acSWolfgang Denk 2165 11ccc33fSMarcel Ziswiler Enable editing and History functions for interactive 2166 aa0c71acSWolfgang Denk commandline input operations 2167 aa0c71acSWolfgang Denk 2168 a8c7c708Swdenk- Default Environment: 2169 c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 2170 c609719bSwdenk 2171 c609719bSwdenk Define this to contain any number of null terminated 2172 c609719bSwdenk strings (variable = value pairs) that will be part of 2173 7152b1d0Swdenk the default environment compiled into the boot image. 2174 2262cfeeSwdenk 2175 c609719bSwdenk For example, place something like this in your 2176 c609719bSwdenk board's config file: 2177 c609719bSwdenk 2178 c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 2179 c609719bSwdenk "myvar1=value1\0" \ 2180 c609719bSwdenk "myvar2=value2\0" 2181 c609719bSwdenk 2182 c609719bSwdenk Warning: This method is based on knowledge about the 2183 c609719bSwdenk internal format how the environment is stored by the 2184 2262cfeeSwdenk U-Boot code. This is NOT an official, exported 2185 c609719bSwdenk interface! Although it is unlikely that this format 2186 7152b1d0Swdenk will change soon, there is no guarantee either. 2187 c609719bSwdenk You better know what you are doing here. 2188 c609719bSwdenk 2189 c609719bSwdenk Note: overly (ab)use of the default environment is 2190 c609719bSwdenk discouraged. Make sure to check other ways to preset 2191 74de7aefSWolfgang Denk the environment like the "source" command or the 2192 c609719bSwdenk boot command first. 2193 c609719bSwdenk 2194 a8c7c708Swdenk- DataFlash Support: 2195 2abbe075Swdenk CONFIG_HAS_DATAFLASH 2196 2abbe075Swdenk 2197 2abbe075Swdenk Defining this option enables DataFlash features and 2198 2abbe075Swdenk allows to read/write in Dataflash via the standard 2199 2abbe075Swdenk commands cp, md... 2200 2abbe075Swdenk 2201 f61ec45eSEric Nelson- Serial Flash support 2202 f61ec45eSEric Nelson CONFIG_CMD_SF 2203 f61ec45eSEric Nelson 2204 f61ec45eSEric Nelson Defining this option enables SPI flash commands 2205 f61ec45eSEric Nelson 'sf probe/read/write/erase/update'. 2206 f61ec45eSEric Nelson 2207 f61ec45eSEric Nelson Usage requires an initial 'probe' to define the serial 2208 f61ec45eSEric Nelson flash parameters, followed by read/write/erase/update 2209 f61ec45eSEric Nelson commands. 2210 f61ec45eSEric Nelson 2211 f61ec45eSEric Nelson The following defaults may be provided by the platform 2212 f61ec45eSEric Nelson to handle the common case when only a single serial 2213 f61ec45eSEric Nelson flash is present on the system. 2214 f61ec45eSEric Nelson 2215 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_BUS Bus identifier 2216 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_CS Chip-select 2217 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_MODE (see include/spi.h) 2218 f61ec45eSEric Nelson CONFIG_SF_DEFAULT_SPEED in Hz 2219 f61ec45eSEric Nelson 2220 3f85ce27Swdenk- SystemACE Support: 2221 3f85ce27Swdenk CONFIG_SYSTEMACE 2222 3f85ce27Swdenk 2223 3f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 2224 3f85ce27Swdenk chips attached via some sort of local bus. The address 2225 11ccc33fSMarcel Ziswiler of the chip must also be defined in the 2226 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_SYSTEMACE_BASE macro. For example: 2227 3f85ce27Swdenk 2228 3f85ce27Swdenk #define CONFIG_SYSTEMACE 2229 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 2230 3f85ce27Swdenk 2231 3f85ce27Swdenk When SystemACE support is added, the "ace" device type 2232 3f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 2233 3f85ce27Swdenk 2234 ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 2235 ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 2236 ecb0ccd9SWolfgang Denk 2237 28cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 2238 ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 2239 28cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 2240 ecb0ccd9SWolfgang Denk number generator is used. 2241 ecb0ccd9SWolfgang Denk 2242 28cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 2243 28cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 2244 28cb9375SWolfgang Denk defined, the normal port 69 is used. 2245 28cb9375SWolfgang Denk 2246 28cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 2247 ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 2248 ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 2249 ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 2250 ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 2251 ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 2252 ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 2253 ecb0ccd9SWolfgang Denk 2254 a8c7c708Swdenk- Show boot progress: 2255 c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 2256 c609719bSwdenk 2257 c609719bSwdenk Defining this option allows to add some board- 2258 c609719bSwdenk specific code (calling a user-provided function 2259 c609719bSwdenk "show_boot_progress(int)") that enables you to show 2260 c609719bSwdenk the system's boot progress on some display (for 2261 c609719bSwdenk example, some LED's) on your board. At the moment, 2262 c609719bSwdenk the following checkpoints are implemented: 2263 c609719bSwdenk 2264 1372cce2SMarian BalakowiczLegacy uImage format: 2265 1372cce2SMarian Balakowicz 2266 c609719bSwdenk Arg Where When 2267 c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 2268 c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 2269 c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 2270 c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 2271 c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 2272 c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 2273 c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 2274 c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 2275 c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 2276 1372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 2277 c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 2278 c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 2279 c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 2280 c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 2281 1372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 2282 c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 2283 1372cce2SMarian Balakowicz 2284 1372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 2285 1372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 2286 1372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 2287 1372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 2288 1372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 2289 1372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 2290 1372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 2291 11ccc33fSMarcel Ziswiler -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) 2292 1372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 2293 1372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 2294 1372cce2SMarian Balakowicz 2295 ea0364f1SPeter Tyser 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS 2296 c609719bSwdenk 2297 a47a12beSStefan Roese -30 arch/powerpc/lib/board.c Fatal error, hang the system 2298 63e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 2299 63e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 2300 63e73c9aSwdenk 2301 566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 2302 566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 2303 566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 2304 566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 2305 566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 2306 566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 2307 566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 2308 566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 2309 566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 2310 566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 2311 566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 2312 566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 2313 566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 2314 566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 2315 566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 2316 566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 2317 566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 2318 566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 2319 566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 2320 566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 2321 566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 2322 566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 2323 566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 2324 566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 2325 566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 2326 566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 2327 566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 2328 566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 2329 566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 2330 566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 2331 566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 2332 566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 2333 566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 2334 566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 2335 566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 2336 566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 2337 566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 2338 566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 2339 566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 2340 566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 2341 566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 2342 566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 2343 566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 2344 566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 2345 566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 2346 566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 2347 566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 2348 c609719bSwdenk 2349 566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 2350 c609719bSwdenk 2351 566a494fSHeiko Schocher 64 net/eth.c starting with Ethernet configuration. 2352 566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 2353 566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 2354 206c60cbSwdenk 2355 566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 2356 566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 2357 11ccc33fSMarcel Ziswiler -81 common/cmd_net.c some error in NetLoop() occurred 2358 566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 2359 566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 2360 566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 2361 74de7aefSWolfgang Denk 83 common/cmd_net.c running "source" command 2362 74de7aefSWolfgang Denk -83 common/cmd_net.c some error in automatic boot or "source" command 2363 566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 2364 c609719bSwdenk 2365 1372cce2SMarian BalakowiczFIT uImage format: 2366 1372cce2SMarian Balakowicz 2367 1372cce2SMarian Balakowicz Arg Where When 2368 1372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 2369 1372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 2370 1372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 2371 1372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 2372 1372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 2373 1372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 2374 f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 2375 1372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 2376 1372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 2377 1372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 2378 1372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 2379 1372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 2380 11ccc33fSMarcel Ziswiler -106 common/cmd_bootm.c Kernel subimage has wrong type 2381 11ccc33fSMarcel Ziswiler 107 common/cmd_bootm.c Kernel subimage type OK 2382 1372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 2383 1372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 2384 1372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 2385 1372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 2386 1372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 2387 1372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 2388 1372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 2389 1372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 2390 1372cce2SMarian Balakowicz 2391 1372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 2392 1372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 2393 1372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 2394 11ccc33fSMarcel Ziswiler 122 common/image.c No ramdisk subimage unit name, using configuration 2395 1372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 2396 1372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 2397 1372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 2398 1372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 2399 1372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 2400 1372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 2401 1372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 2402 1372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 2403 1372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 2404 1372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 2405 1372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 2406 1372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 2407 1372cce2SMarian Balakowicz 2408 11ccc33fSMarcel Ziswiler -130 common/cmd_doc.c Incorrect FIT image format 2409 1372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 2410 1372cce2SMarian Balakowicz 2411 11ccc33fSMarcel Ziswiler -140 common/cmd_ide.c Incorrect FIT image format 2412 1372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 2413 1372cce2SMarian Balakowicz 2414 11ccc33fSMarcel Ziswiler -150 common/cmd_nand.c Incorrect FIT image format 2415 1372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 2416 1372cce2SMarian Balakowicz 2417 4cf2609bSWolfgang Denk- Standalone program support: 2418 4cf2609bSWolfgang Denk CONFIG_STANDALONE_LOAD_ADDR 2419 4cf2609bSWolfgang Denk 2420 6feff899SWolfgang Denk This option defines a board specific value for the 2421 6feff899SWolfgang Denk address where standalone program gets loaded, thus 2422 6feff899SWolfgang Denk overwriting the architecture dependent default 2423 4cf2609bSWolfgang Denk settings. 2424 4cf2609bSWolfgang Denk 2425 4cf2609bSWolfgang Denk- Frame Buffer Address: 2426 4cf2609bSWolfgang Denk CONFIG_FB_ADDR 2427 4cf2609bSWolfgang Denk 2428 4cf2609bSWolfgang Denk Define CONFIG_FB_ADDR if you want to use specific 2429 4cf2609bSWolfgang Denk address for frame buffer. 2430 4cf2609bSWolfgang Denk Then system will reserve the frame buffer address to 2431 4cf2609bSWolfgang Denk defined address instead of lcd_setmem (this function 2432 6feff899SWolfgang Denk grabs the memory for frame buffer by panel's size). 2433 4cf2609bSWolfgang Denk 2434 4cf2609bSWolfgang Denk Please see board_init_f function. 2435 4cf2609bSWolfgang Denk 2436 cccfc2abSDetlev Zundel- Automatic software updates via TFTP server 2437 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP 2438 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_CNT_MAX 2439 cccfc2abSDetlev Zundel CONFIG_UPDATE_TFTP_MSEC_MAX 2440 cccfc2abSDetlev Zundel 2441 cccfc2abSDetlev Zundel These options enable and control the auto-update feature; 2442 cccfc2abSDetlev Zundel for a more detailed description refer to doc/README.update. 2443 cccfc2abSDetlev Zundel 2444 cccfc2abSDetlev Zundel- MTD Support (mtdparts command, UBI support) 2445 cccfc2abSDetlev Zundel CONFIG_MTD_DEVICE 2446 cccfc2abSDetlev Zundel 2447 cccfc2abSDetlev Zundel Adds the MTD device infrastructure from the Linux kernel. 2448 cccfc2abSDetlev Zundel Needed for mtdparts command support. 2449 cccfc2abSDetlev Zundel 2450 cccfc2abSDetlev Zundel CONFIG_MTD_PARTITIONS 2451 cccfc2abSDetlev Zundel 2452 cccfc2abSDetlev Zundel Adds the MTD partitioning infrastructure from the Linux 2453 cccfc2abSDetlev Zundel kernel. Needed for UBI support. 2454 cccfc2abSDetlev Zundel 2455 6a11cf48SDaniel Schwierzeck- SPL framework 2456 6a11cf48SDaniel Schwierzeck CONFIG_SPL 2457 6a11cf48SDaniel Schwierzeck Enable building of SPL globally. 2458 6a11cf48SDaniel Schwierzeck 2459 6a11cf48SDaniel Schwierzeck CONFIG_SPL_TEXT_BASE 2460 6a11cf48SDaniel Schwierzeck TEXT_BASE for linking the SPL binary. 2461 6a11cf48SDaniel Schwierzeck 2462 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LDSCRIPT 2463 6a11cf48SDaniel Schwierzeck LDSCRIPT for linking the SPL binary. 2464 6a11cf48SDaniel Schwierzeck 2465 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBCOMMON_SUPPORT 2466 6a11cf48SDaniel Schwierzeck Support for common/libcommon.o in SPL binary 2467 6a11cf48SDaniel Schwierzeck 2468 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBDISK_SUPPORT 2469 6a11cf48SDaniel Schwierzeck Support for disk/libdisk.o in SPL binary 2470 6a11cf48SDaniel Schwierzeck 2471 6a11cf48SDaniel Schwierzeck CONFIG_SPL_I2C_SUPPORT 2472 6a11cf48SDaniel Schwierzeck Support for drivers/i2c/libi2c.o in SPL binary 2473 6a11cf48SDaniel Schwierzeck 2474 6a11cf48SDaniel Schwierzeck CONFIG_SPL_GPIO_SUPPORT 2475 6a11cf48SDaniel Schwierzeck Support for drivers/gpio/libgpio.o in SPL binary 2476 6a11cf48SDaniel Schwierzeck 2477 6a11cf48SDaniel Schwierzeck CONFIG_SPL_MMC_SUPPORT 2478 6a11cf48SDaniel Schwierzeck Support for drivers/mmc/libmmc.o in SPL binary 2479 6a11cf48SDaniel Schwierzeck 2480 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SERIAL_SUPPORT 2481 6a11cf48SDaniel Schwierzeck Support for drivers/serial/libserial.o in SPL binary 2482 6a11cf48SDaniel Schwierzeck 2483 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_FLASH_SUPPORT 2484 6a11cf48SDaniel Schwierzeck Support for drivers/mtd/spi/libspi_flash.o in SPL binary 2485 6a11cf48SDaniel Schwierzeck 2486 6a11cf48SDaniel Schwierzeck CONFIG_SPL_SPI_SUPPORT 2487 6a11cf48SDaniel Schwierzeck Support for drivers/spi/libspi.o in SPL binary 2488 6a11cf48SDaniel Schwierzeck 2489 6a11cf48SDaniel Schwierzeck CONFIG_SPL_FAT_SUPPORT 2490 6a11cf48SDaniel Schwierzeck Support for fs/fat/libfat.o in SPL binary 2491 6a11cf48SDaniel Schwierzeck 2492 6a11cf48SDaniel Schwierzeck CONFIG_SPL_LIBGENERIC_SUPPORT 2493 6a11cf48SDaniel Schwierzeck Support for lib/libgeneric.o in SPL binary 2494 1372cce2SMarian Balakowicz 2495 c609719bSwdenkModem Support: 2496 c609719bSwdenk-------------- 2497 c609719bSwdenk 2498 566e5cf4SWolfgang Denk[so far only for SMDK2400 boards] 2499 c609719bSwdenk 2500 11ccc33fSMarcel Ziswiler- Modem support enable: 2501 c609719bSwdenk CONFIG_MODEM_SUPPORT 2502 c609719bSwdenk 2503 c609719bSwdenk- RTS/CTS Flow control enable: 2504 c609719bSwdenk CONFIG_HWFLOW 2505 c609719bSwdenk 2506 c609719bSwdenk- Modem debug support: 2507 c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 2508 c609719bSwdenk 2509 c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 2510 c609719bSwdenk for modem support. Useful only with BDI2000. 2511 c609719bSwdenk 2512 a8c7c708Swdenk- Interrupt support (PPC): 2513 a8c7c708Swdenk 2514 a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 2515 a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 2516 11ccc33fSMarcel Ziswiler for CPU specific initialization. interrupt_init_cpu() 2517 a8c7c708Swdenk should set decrementer_count to appropriate value. If 2518 11ccc33fSMarcel Ziswiler CPU resets decrementer automatically after interrupt 2519 a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 2520 11ccc33fSMarcel Ziswiler timer_interrupt() calls timer_interrupt_cpu() for CPU 2521 a8c7c708Swdenk specific handling. If board has watchdog / status_led 2522 a8c7c708Swdenk / other_activity_monitor it works automatically from 2523 a8c7c708Swdenk general timer_interrupt(). 2524 a8c7c708Swdenk 2525 c609719bSwdenk- General: 2526 c609719bSwdenk 2527 c609719bSwdenk In the target system modem support is enabled when a 2528 c609719bSwdenk specific key (key combination) is pressed during 2529 c609719bSwdenk power-on. Otherwise U-Boot will boot normally 2530 11ccc33fSMarcel Ziswiler (autoboot). The key_pressed() function is called from 2531 c609719bSwdenk board_init(). Currently key_pressed() is a dummy 2532 c609719bSwdenk function, returning 1 and thus enabling modem 2533 c609719bSwdenk initialization. 2534 c609719bSwdenk 2535 c609719bSwdenk If there are no modem init strings in the 2536 c609719bSwdenk environment, U-Boot proceed to autoboot; the 2537 c609719bSwdenk previous output (banner, info printfs) will be 2538 11ccc33fSMarcel Ziswiler suppressed, though. 2539 c609719bSwdenk 2540 c609719bSwdenk See also: doc/README.Modem 2541 c609719bSwdenk 2542 9660e442SHelmut RaigerBoard initialization settings: 2543 9660e442SHelmut Raiger------------------------------ 2544 9660e442SHelmut Raiger 2545 9660e442SHelmut RaigerDuring Initialization u-boot calls a number of board specific functions 2546 9660e442SHelmut Raigerto allow the preparation of board specific prerequisites, e.g. pin setup 2547 9660e442SHelmut Raigerbefore drivers are initialized. To enable these callbacks the 2548 9660e442SHelmut Raigerfollowing configuration macros have to be defined. Currently this is 2549 9660e442SHelmut Raigerarchitecture specific, so please check arch/your_architecture/lib/board.c 2550 9660e442SHelmut Raigertypically in board_init_f() and board_init_r(). 2551 9660e442SHelmut Raiger 2552 9660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() 2553 9660e442SHelmut Raiger- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() 2554 9660e442SHelmut Raiger- CONFIG_BOARD_LATE_INIT: Call board_late_init() 2555 9660e442SHelmut Raiger- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() 2556 c609719bSwdenk 2557 c609719bSwdenkConfiguration Settings: 2558 c609719bSwdenk----------------------- 2559 c609719bSwdenk 2560 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LONGHELP: Defined when you want long help messages included; 2561 c609719bSwdenk undefine this when you're short of memory. 2562 c609719bSwdenk 2563 2fb2604dSPeter Tyser- CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default 2564 2fb2604dSPeter Tyser width of the commands listed in the 'help' command output. 2565 2fb2604dSPeter Tyser 2566 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to 2567 c609719bSwdenk prompt for user input. 2568 c609719bSwdenk 2569 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CBSIZE: Buffer size for input from the Console 2570 c609719bSwdenk 2571 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PBSIZE: Buffer size for Console output 2572 c609719bSwdenk 2573 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands 2574 c609719bSwdenk 2575 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to 2576 c609719bSwdenk the application (usually a Linux kernel) when it is 2577 c609719bSwdenk booted 2578 c609719bSwdenk 2579 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BAUDRATE_TABLE: 2580 c609719bSwdenk List of legal baudrate settings for this board. 2581 c609719bSwdenk 2582 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_INFO_QUIET 2583 c609719bSwdenk Suppress display of console information at boot. 2584 c609719bSwdenk 2585 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_IS_IN_ENV 2586 c609719bSwdenk If the board specific function 2587 c609719bSwdenk extern int overwrite_console (void); 2588 c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 2589 c609719bSwdenk serial port, else the settings in the environment are used. 2590 c609719bSwdenk 2591 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 2592 c609719bSwdenk Enable the call to overwrite_console(). 2593 c609719bSwdenk 2594 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CONSOLE_ENV_OVERWRITE 2595 c609719bSwdenk Enable overwrite of previous console environment settings. 2596 c609719bSwdenk 2597 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: 2598 c609719bSwdenk Begin and End addresses of the area used by the 2599 c609719bSwdenk simple memory test. 2600 c609719bSwdenk 2601 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_ALT_MEMTEST: 2602 c609719bSwdenk Enable an alternate, more extensive memory test. 2603 c609719bSwdenk 2604 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEMTEST_SCRATCH: 2605 5f535fe1Swdenk Scratch address used by the alternate memory test 2606 5f535fe1Swdenk You only need to set this if address zero isn't writeable 2607 5f535fe1Swdenk 2608 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MEM_TOP_HIDE (PPC only): 2609 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, 2610 14f73ca6SStefan Roese this specified memory area will get subtracted from the top 2611 11ccc33fSMarcel Ziswiler (end) of RAM and won't get "touched" at all by U-Boot. By 2612 14f73ca6SStefan Roese fixing up gd->ram_size the Linux kernel should gets passed 2613 14f73ca6SStefan Roese the now "corrected" memory size and won't touch it either. 2614 14f73ca6SStefan Roese This should work for arch/ppc and arch/powerpc. Only Linux 2615 5e12e75dSStefan Roese board ports in arch/powerpc with bootwrapper support that 2616 14f73ca6SStefan Roese recalculate the memory size from the SDRAM controller setup 2617 5e12e75dSStefan Roese will have to get fixed in Linux additionally. 2618 14f73ca6SStefan Roese 2619 14f73ca6SStefan Roese This option can be used as a workaround for the 440EPx/GRx 2620 14f73ca6SStefan Roese CHIP 11 errata where the last 256 bytes in SDRAM shouldn't 2621 14f73ca6SStefan Roese be touched. 2622 14f73ca6SStefan Roese 2623 14f73ca6SStefan Roese WARNING: Please make sure that this value is a multiple of 2624 14f73ca6SStefan Roese the Linux page size (normally 4k). If this is not the case, 2625 14f73ca6SStefan Roese then the end address of the Linux memory will be located at a 2626 14f73ca6SStefan Roese non page size aligned address and this could cause major 2627 14f73ca6SStefan Roese problems. 2628 14f73ca6SStefan Roese 2629 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TFTP_LOADADDR: 2630 c609719bSwdenk Default load address for network file downloads 2631 c609719bSwdenk 2632 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_LOADS_BAUD_CHANGE: 2633 c609719bSwdenk Enable temporary baudrate change while serial download 2634 c609719bSwdenk 2635 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SDRAM_BASE: 2636 c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 2637 c609719bSwdenk 2638 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MBIO_BASE: 2639 c609719bSwdenk Physical start address of Motherboard I/O (if using a 2640 c609719bSwdenk Cogent motherboard) 2641 c609719bSwdenk 2642 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_BASE: 2643 c609719bSwdenk Physical start address of Flash memory. 2644 c609719bSwdenk 2645 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_BASE: 2646 c609719bSwdenk Physical start address of boot monitor code (set by 2647 c609719bSwdenk make config files to be same as the text base address 2648 14d0a02aSWolfgang Denk (CONFIG_SYS_TEXT_BASE) used when linking) - same as 2649 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FLASH_BASE when booting from flash. 2650 c609719bSwdenk 2651 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MONITOR_LEN: 2652 3b57fe0aSwdenk Size of memory reserved for monitor code, used to 2653 3b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 2654 3b57fe0aSwdenk embedded within the U-Boot image, or in a separate 2655 3b57fe0aSwdenk flash sector. 2656 c609719bSwdenk 2657 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MALLOC_LEN: 2658 c609719bSwdenk Size of DRAM reserved for malloc() use. 2659 c609719bSwdenk 2660 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTM_LEN: 2661 15940c9aSStefan Roese Normally compressed uImages are limited to an 2662 15940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 2663 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD you can define CONFIG_SYS_BOOTM_LEN in your board config file 2664 15940c9aSStefan Roese to adjust this setting to your needs. 2665 c609719bSwdenk 2666 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_BOOTMAPSZ: 2667 c609719bSwdenk Maximum size of memory mapped by the startup code of 2668 c609719bSwdenk the Linux kernel; all data that must be processed by 2669 7d721e34SBartlomiej Sieka the Linux kernel (bd_info, boot arguments, FDT blob if 2670 7d721e34SBartlomiej Sieka used) must be put below this limit, unless "bootm_low" 2671 7d721e34SBartlomiej Sieka enviroment variable is defined and non-zero. In such case 2672 7d721e34SBartlomiej Sieka all data for the Linux kernel must be between "bootm_low" 2673 c3624e6eSGrant Likely and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment 2674 c3624e6eSGrant Likely variable "bootm_mapsize" will override the value of 2675 c3624e6eSGrant Likely CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, 2676 c3624e6eSGrant Likely then the value in "bootm_size" will be used instead. 2677 c609719bSwdenk 2678 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_RAMDISK_HIGH: 2679 fca43cc8SJohn Rigby Enable initrd_high functionality. If defined then the 2680 fca43cc8SJohn Rigby initrd_high feature is enabled and the bootm ramdisk subcommand 2681 fca43cc8SJohn Rigby is enabled. 2682 fca43cc8SJohn Rigby 2683 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_CMDLINE: 2684 fca43cc8SJohn Rigby Enables allocating and saving kernel cmdline in space between 2685 fca43cc8SJohn Rigby "bootm_low" and "bootm_low" + BOOTMAPSZ. 2686 fca43cc8SJohn Rigby 2687 fca43cc8SJohn Rigby- CONFIG_SYS_BOOT_GET_KBD: 2688 fca43cc8SJohn Rigby Enables allocating and saving a kernel copy of the bd_info in 2689 fca43cc8SJohn Rigby space between "bootm_low" and "bootm_low" + BOOTMAPSZ. 2690 fca43cc8SJohn Rigby 2691 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_BANKS: 2692 c609719bSwdenk Max number of Flash memory banks 2693 c609719bSwdenk 2694 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAX_FLASH_SECT: 2695 c609719bSwdenk Max number of sectors on a Flash chip 2696 c609719bSwdenk 2697 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_ERASE_TOUT: 2698 c609719bSwdenk Timeout for Flash erase operations (in ms) 2699 c609719bSwdenk 2700 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_WRITE_TOUT: 2701 c609719bSwdenk Timeout for Flash write operations (in ms) 2702 c609719bSwdenk 2703 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_LOCK_TOUT 2704 8564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 2705 8564acf9Swdenk 2706 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_UNLOCK_TOUT 2707 8564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 2708 8564acf9Swdenk 2709 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_PROTECTION 2710 8564acf9Swdenk If defined, hardware flash sectors protection is used 2711 8564acf9Swdenk instead of U-Boot software protection. 2712 8564acf9Swdenk 2713 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DIRECT_FLASH_TFTP: 2714 c609719bSwdenk 2715 c609719bSwdenk Enable TFTP transfers directly to flash memory; 2716 c609719bSwdenk without this option such a download has to be 2717 c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2718 c609719bSwdenk copy from RAM to flash. 2719 c609719bSwdenk 2720 c609719bSwdenk The two-step approach is usually more reliable, since 2721 c609719bSwdenk you can check if the download worked before you erase 2722 11ccc33fSMarcel Ziswiler the flash, but in some situations (when system RAM is 2723 11ccc33fSMarcel Ziswiler too limited to allow for a temporary copy of the 2724 c609719bSwdenk downloaded image) this option may be very useful. 2725 c609719bSwdenk 2726 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_CFI: 2727 c609719bSwdenk Define if the flash driver uses extra elements in the 2728 5653fc33Swdenk common flash structure for storing flash geometry. 2729 5653fc33Swdenk 2730 00b1883aSJean-Christophe PLAGNIOL-VILLARD- CONFIG_FLASH_CFI_DRIVER 2731 5653fc33Swdenk This option also enables the building of the cfi_flash driver 2732 5653fc33Swdenk in the drivers directory 2733 53cf9435Sstroese 2734 91809ed5SPiotr Ziecik- CONFIG_FLASH_CFI_MTD 2735 91809ed5SPiotr Ziecik This option enables the building of the cfi_mtd driver 2736 91809ed5SPiotr Ziecik in the drivers directory. The driver exports CFI flash 2737 91809ed5SPiotr Ziecik to the MTD layer. 2738 91809ed5SPiotr Ziecik 2739 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_USE_BUFFER_WRITE 2740 96ef831fSGuennadi Liakhovetski Use buffered writes to flash. 2741 96ef831fSGuennadi Liakhovetski 2742 96ef831fSGuennadi Liakhovetski- CONFIG_FLASH_SPANSION_S29WS_N 2743 96ef831fSGuennadi Liakhovetski s29ws-n MirrorBit flash has non-standard addresses for buffered 2744 96ef831fSGuennadi Liakhovetski write commands. 2745 96ef831fSGuennadi Liakhovetski 2746 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FLASH_QUIET_TEST 2747 5568e613SStefan Roese If this option is defined, the common CFI flash doesn't 2748 5568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 2749 5568e613SStefan Roese is useful, if some of the configured banks are only 2750 5568e613SStefan Roese optionally available. 2751 5568e613SStefan Roese 2752 9a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 2753 9a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 2754 9a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 2755 9a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 2756 9a042e9cSJerry Van Baren 2757 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_RX_ETH_BUFFER: 2758 11ccc33fSMarcel Ziswiler Defines the number of Ethernet receive buffers. On some 2759 11ccc33fSMarcel Ziswiler Ethernet controllers it is recommended to set this value 2760 53cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 2761 53cf9435Sstroese buffers can be full shortly after enabling the interface 2762 11ccc33fSMarcel Ziswiler on high Ethernet traffic. 2763 53cf9435Sstroese Defaults to 4 if not defined. 2764 c609719bSwdenk 2765 ea882bafSWolfgang Denk- CONFIG_ENV_MAX_ENTRIES 2766 ea882bafSWolfgang Denk 2767 ea882bafSWolfgang Denk Maximum number of entries in the hash table that is used 2768 ea882bafSWolfgang Denk internally to store the environment settings. The default 2769 ea882bafSWolfgang Denk setting is supposed to be generous and should work in most 2770 ea882bafSWolfgang Denk cases. This setting can be used to tune behaviour; see 2771 ea882bafSWolfgang Denk lib/hashtable.c for details. 2772 ea882bafSWolfgang Denk 2773 c609719bSwdenkThe following definitions that deal with the placement and management 2774 c609719bSwdenkof environment data (variable area); in general, we support the 2775 c609719bSwdenkfollowing configurations: 2776 c609719bSwdenk 2777 c3eb3fe4SMike Frysinger- CONFIG_BUILD_ENVCRC: 2778 c3eb3fe4SMike Frysinger 2779 c3eb3fe4SMike Frysinger Builds up envcrc with the target environment so that external utils 2780 c3eb3fe4SMike Frysinger may easily extract it and embed it in final U-Boot images. 2781 c3eb3fe4SMike Frysinger 2782 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_FLASH: 2783 c609719bSwdenk 2784 c609719bSwdenk Define this if the environment is in flash memory. 2785 c609719bSwdenk 2786 c609719bSwdenk a) The environment occupies one whole flash sector, which is 2787 c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2788 c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2789 c609719bSwdenk sector" type flash chips, which have several smaller 2790 c609719bSwdenk sectors at the start or the end. For instance, such a 2791 c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2792 c609719bSwdenk such a case you would place the environment in one of the 2793 c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2794 c609719bSwdenk "top boot sector" type flash chips, you would put the 2795 c609719bSwdenk environment in one of the last sectors, leaving a gap 2796 c609719bSwdenk between U-Boot and the environment. 2797 c609719bSwdenk 2798 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2799 c609719bSwdenk 2800 c609719bSwdenk Offset of environment data (variable area) to the 2801 c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2802 c609719bSwdenk type flash chips the second sector can be used: the offset 2803 c609719bSwdenk for this sector is given here. 2804 c609719bSwdenk 2805 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. 2806 c609719bSwdenk 2807 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2808 c609719bSwdenk 2809 c609719bSwdenk This is just another way to specify the start address of 2810 c609719bSwdenk the flash sector containing the environment (instead of 2811 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_OFFSET). 2812 c609719bSwdenk 2813 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SECT_SIZE: 2814 c609719bSwdenk 2815 c609719bSwdenk Size of the sector containing the environment. 2816 c609719bSwdenk 2817 c609719bSwdenk 2818 c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2819 c609719bSwdenk In such a case you don't want to spend a whole sector for 2820 c609719bSwdenk the environment. 2821 c609719bSwdenk 2822 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2823 c609719bSwdenk 2824 5a1aceb0SJean-Christophe PLAGNIOL-VILLARD If you use this in combination with CONFIG_ENV_IS_IN_FLASH 2825 0e8d1586SJean-Christophe PLAGNIOL-VILLARD and CONFIG_ENV_SECT_SIZE, you can specify to use only a part 2826 c609719bSwdenk of this flash sector for the environment. This saves 2827 c609719bSwdenk memory for the RAM copy of the environment. 2828 c609719bSwdenk 2829 c609719bSwdenk It may also save flash memory if you decide to use this 2830 c609719bSwdenk when your environment is "embedded" within U-Boot code, 2831 c609719bSwdenk since then the remainder of the flash sector could be used 2832 c609719bSwdenk for U-Boot code. It should be pointed out that this is 2833 c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2834 c609719bSwdenk updating the environment in flash makes it always 2835 c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2836 c609719bSwdenk wrong before the contents has been restored from a copy in 2837 c609719bSwdenk RAM, your target system will be dead. 2838 c609719bSwdenk 2839 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR_REDUND 2840 0e8d1586SJean-Christophe PLAGNIOL-VILLARD CONFIG_ENV_SIZE_REDUND 2841 c609719bSwdenk 2842 c609719bSwdenk These settings describe a second storage area used to hold 2843 11ccc33fSMarcel Ziswiler a redundant copy of the environment data, so that there is 2844 3e38691eSwdenk a valid backup copy in case there is a power failure during 2845 c609719bSwdenk a "saveenv" operation. 2846 c609719bSwdenk 2847 c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2848 c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2849 c609719bSwdenkaccordingly! 2850 c609719bSwdenk 2851 c609719bSwdenk 2852 9314cee6SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NVRAM: 2853 c609719bSwdenk 2854 c609719bSwdenk Define this if you have some non-volatile memory device 2855 c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2856 c609719bSwdenk environment. 2857 c609719bSwdenk 2858 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2859 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2860 c609719bSwdenk 2861 11ccc33fSMarcel Ziswiler These two #defines are used to determine the memory area you 2862 c609719bSwdenk want to use for environment. It is assumed that this memory 2863 c609719bSwdenk can just be read and written to, without any special 2864 c609719bSwdenk provision. 2865 c609719bSwdenk 2866 c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2867 c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 2868 11ccc33fSMarcel Ziswilerconsole baudrate). You *MUST* have mapped your NVRAM area then, or 2869 c609719bSwdenkU-Boot will hang. 2870 c609719bSwdenk 2871 c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2872 c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2873 c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2874 c609719bSwdenkto save the current settings. 2875 c609719bSwdenk 2876 c609719bSwdenk 2877 bb1f8b4fSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_EEPROM: 2878 c609719bSwdenk 2879 c609719bSwdenk Use this if you have an EEPROM or similar serial access 2880 c609719bSwdenk device and a driver for it. 2881 c609719bSwdenk 2882 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2883 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2884 c609719bSwdenk 2885 c609719bSwdenk These two #defines specify the offset and size of the 2886 c609719bSwdenk environment area within the total memory of your EEPROM. 2887 c609719bSwdenk 2888 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR: 2889 c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2890 c609719bSwdenk The default address is zero. 2891 c609719bSwdenk 2892 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: 2893 c609719bSwdenk If defined, the number of bits used to address bytes in a 2894 c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2895 c609719bSwdenk would require six bits. 2896 c609719bSwdenk 2897 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: 2898 c609719bSwdenk If defined, the number of milliseconds to delay between 2899 c609719bSwdenk page writes. The default is zero milliseconds. 2900 c609719bSwdenk 2901 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: 2902 c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2903 c609719bSwdenk that this is NOT the chip address length! 2904 c609719bSwdenk 2905 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: 2906 5cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 2907 5cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 2908 5cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 2909 5cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 2910 5cf91d6bSwdenk byte chips. 2911 5cf91d6bSwdenk 2912 5cf91d6bSwdenk Note that we consider the length of the address field to 2913 5cf91d6bSwdenk still be one byte because the extra address bits are hidden 2914 5cf91d6bSwdenk in the chip address. 2915 5cf91d6bSwdenk 2916 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD - CONFIG_SYS_EEPROM_SIZE: 2917 c609719bSwdenk The size in bytes of the EEPROM device. 2918 c609719bSwdenk 2919 548738b4SHeiko Schocher - CONFIG_ENV_EEPROM_IS_ON_I2C 2920 548738b4SHeiko Schocher define this, if you have I2C and SPI activated, and your 2921 548738b4SHeiko Schocher EEPROM, which holds the environment, is on the I2C bus. 2922 548738b4SHeiko Schocher 2923 548738b4SHeiko Schocher - CONFIG_I2C_ENV_EEPROM_BUS 2924 548738b4SHeiko Schocher if you have an Environment on an EEPROM reached over 2925 548738b4SHeiko Schocher I2C muxes, you can define here, how to reach this 2926 548738b4SHeiko Schocher EEPROM. For example: 2927 548738b4SHeiko Schocher 2928 548738b4SHeiko Schocher #define CONFIG_I2C_ENV_EEPROM_BUS "pca9547:70:d\0" 2929 548738b4SHeiko Schocher 2930 548738b4SHeiko Schocher EEPROM which holds the environment, is reached over 2931 548738b4SHeiko Schocher a pca9547 i2c mux with address 0x70, channel 3. 2932 c609719bSwdenk 2933 057c849cSJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_DATAFLASH: 2934 5779d8d9Swdenk 2935 5779d8d9Swdenk Define this if you have a DataFlash memory device which you 2936 5779d8d9Swdenk want to use for the environment. 2937 5779d8d9Swdenk 2938 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2939 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_ADDR: 2940 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2941 5779d8d9Swdenk 2942 5779d8d9Swdenk These three #defines specify the offset and size of the 2943 5779d8d9Swdenk environment area within the total memory of your DataFlash placed 2944 5779d8d9Swdenk at the specified address. 2945 5779d8d9Swdenk 2946 51bfee19SJean-Christophe PLAGNIOL-VILLARD- CONFIG_ENV_IS_IN_NAND: 2947 13a5695bSwdenk 2948 13a5695bSwdenk Define this if you have a NAND device which you want to use 2949 13a5695bSwdenk for the environment. 2950 13a5695bSwdenk 2951 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_OFFSET: 2952 0e8d1586SJean-Christophe PLAGNIOL-VILLARD - CONFIG_ENV_SIZE: 2953 13a5695bSwdenk 2954 13a5695bSwdenk These two #defines specify the offset and size of the environment 2955 fdd813deSScott Wood area within the first NAND device. CONFIG_ENV_OFFSET must be 2956 fdd813deSScott Wood aligned to an erase block boundary. 2957 5779d8d9Swdenk 2958 fdd813deSScott Wood - CONFIG_ENV_OFFSET_REDUND (optional): 2959 e443c944SMarkus Klotzbuecher 2960 0e8d1586SJean-Christophe PLAGNIOL-VILLARD This setting describes a second storage area of CONFIG_ENV_SIZE 2961 fdd813deSScott Wood size used to hold a redundant copy of the environment data, so 2962 fdd813deSScott Wood that there is a valid backup copy in case there is a power failure 2963 fdd813deSScott Wood during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be 2964 fdd813deSScott Wood aligned to an erase block boundary. 2965 e443c944SMarkus Klotzbuecher 2966 fdd813deSScott Wood - CONFIG_ENV_RANGE (optional): 2967 fdd813deSScott Wood 2968 fdd813deSScott Wood Specifies the length of the region in which the environment 2969 fdd813deSScott Wood can be written. This should be a multiple of the NAND device's 2970 fdd813deSScott Wood block size. Specifying a range with more erase blocks than 2971 fdd813deSScott Wood are needed to hold CONFIG_ENV_SIZE allows bad blocks within 2972 fdd813deSScott Wood the range to be avoided. 2973 fdd813deSScott Wood 2974 fdd813deSScott Wood - CONFIG_ENV_OFFSET_OOB (optional): 2975 fdd813deSScott Wood 2976 fdd813deSScott Wood Enables support for dynamically retrieving the offset of the 2977 fdd813deSScott Wood environment from block zero's out-of-band data. The 2978 fdd813deSScott Wood "nand env.oob" command can be used to record this offset. 2979 fdd813deSScott Wood Currently, CONFIG_ENV_OFFSET_REDUND is not supported when 2980 fdd813deSScott Wood using CONFIG_ENV_OFFSET_OOB. 2981 e443c944SMarkus Klotzbuecher 2982 b74ab737SGuennadi Liakhovetski- CONFIG_NAND_ENV_DST 2983 b74ab737SGuennadi Liakhovetski 2984 b74ab737SGuennadi Liakhovetski Defines address in RAM to which the nand_spl code should copy the 2985 b74ab737SGuennadi Liakhovetski environment. If redundant environment is used, it will be copied to 2986 b74ab737SGuennadi Liakhovetski CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. 2987 b74ab737SGuennadi Liakhovetski 2988 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_INIT_OFFSET 2989 c609719bSwdenk 2990 c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2991 c609719bSwdenk area is used at an early stage (ROM part) if the environment 2992 c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2993 c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2994 c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2995 c609719bSwdenk to be a good choice since it makes it far enough from the 2996 c609719bSwdenk start of the data area as well as from the stack pointer. 2997 c609719bSwdenk 2998 e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2999 c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 3000 cdb74977SWolfgang Denkcreated; also, when using EEPROM you will have to use getenv_f() 3001 c609719bSwdenkuntil then to read environment variables. 3002 c609719bSwdenk 3003 85ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 3004 85ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 3005 85ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 3006 85ec0bccSwdenknecessary, because the first environment variable we need is the 3007 85ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 3008 85ec0bccSwdenkhave any device yet where we could complain.] 3009 c609719bSwdenk 3010 c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 3011 c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 3012 85ec0bccSwdenkuse the "saveenv" command to store a valid environment. 3013 c609719bSwdenk 3014 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_ECHO_LINK_DOWN: 3015 fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 3016 fc3e2165Swdenk 3017 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR 3018 fc3e2165Swdenk also needs to be defined. 3019 fc3e2165Swdenk 3020 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_FAULT_MII_ADDR: 3021 fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 3022 c609719bSwdenk 3023 f5675aa5SRon Madrid- CONFIG_NS16550_MIN_FUNCTIONS: 3024 f5675aa5SRon Madrid Define this if you desire to only have use of the NS16550_init 3025 f5675aa5SRon Madrid and NS16550_putc functions for the serial driver located at 3026 f5675aa5SRon Madrid drivers/serial/ns16550.c. This option is useful for saving 3027 f5675aa5SRon Madrid space for already greatly restricted images, including but not 3028 f5675aa5SRon Madrid limited to NAND_SPL configurations. 3029 f5675aa5SRon Madrid 3030 c609719bSwdenkLow Level (hardware related) configuration options: 3031 dc7c9a1aSwdenk--------------------------------------------------- 3032 c609719bSwdenk 3033 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CACHELINE_SIZE: 3034 c609719bSwdenk Cache Line Size of the CPU. 3035 c609719bSwdenk 3036 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DEFAULT_IMMR: 3037 c609719bSwdenk Default address of the IMMR after system reset. 3038 2535d602Swdenk 3039 2535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 3040 2535d602Swdenk and RPXsuper) to be able to adjust the position of 3041 2535d602Swdenk the IMMR register after a reset. 3042 c609719bSwdenk 3043 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_DEFAULT: 3044 e46fedfeSTimur Tabi Default (power-on reset) physical address of CCSR on Freescale 3045 e46fedfeSTimur Tabi PowerPC SOCs. 3046 e46fedfeSTimur Tabi 3047 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR: 3048 e46fedfeSTimur Tabi Virtual address of CCSR. On a 32-bit build, this is typically 3049 e46fedfeSTimur Tabi the same value as CONFIG_SYS_CCSRBAR_DEFAULT. 3050 e46fedfeSTimur Tabi 3051 e46fedfeSTimur Tabi CONFIG_SYS_DEFAULT_IMMR must also be set to this value, 3052 e46fedfeSTimur Tabi for cross-platform code that uses that macro instead. 3053 e46fedfeSTimur Tabi 3054 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS: 3055 e46fedfeSTimur Tabi Physical address of CCSR. CCSR can be relocated to a new 3056 e46fedfeSTimur Tabi physical address, if desired. In this case, this macro should 3057 e46fedfeSTimur Tabi be set to that address. Otherwise, it should be set to the 3058 e46fedfeSTimur Tabi same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR 3059 e46fedfeSTimur Tabi is typically relocated on 36-bit builds. It is recommended 3060 e46fedfeSTimur Tabi that this macro be defined via the _HIGH and _LOW macros: 3061 e46fedfeSTimur Tabi 3062 e46fedfeSTimur Tabi #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH 3063 e46fedfeSTimur Tabi * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) 3064 e46fedfeSTimur Tabi 3065 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_HIGH: 3066 e46fedfeSTimur Tabi Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically 3067 e46fedfeSTimur Tabi either 0 (32-bit build) or 0xF (36-bit build). This macro is 3068 e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3069 e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3070 e46fedfeSTimur Tabi 3071 e46fedfeSTimur Tabi- CONFIG_SYS_CCSRBAR_PHYS_LOW: 3072 e46fedfeSTimur Tabi Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is 3073 e46fedfeSTimur Tabi used in assembly code, so it must not contain typecasts or 3074 e46fedfeSTimur Tabi integer size suffixes (e.g. "ULL"). 3075 e46fedfeSTimur Tabi 3076 e46fedfeSTimur Tabi- CONFIG_SYS_CCSR_DO_NOT_RELOCATE: 3077 e46fedfeSTimur Tabi If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be 3078 e46fedfeSTimur Tabi forced to a value that ensures that CCSR is not relocated. 3079 e46fedfeSTimur Tabi 3080 7f6c2cbcSwdenk- Floppy Disk Support: 3081 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER 3082 7f6c2cbcSwdenk 3083 7f6c2cbcSwdenk the default drive number (default value 0) 3084 7f6c2cbcSwdenk 3085 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_STRIDE 3086 7f6c2cbcSwdenk 3087 11ccc33fSMarcel Ziswiler defines the spacing between FDC chipset registers 3088 7f6c2cbcSwdenk (default value 1) 3089 7f6c2cbcSwdenk 3090 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_ISA_IO_OFFSET 3091 7f6c2cbcSwdenk 3092 7f6c2cbcSwdenk defines the offset of register from address. It 3093 7f6c2cbcSwdenk depends on which part of the data bus is connected to 3094 11ccc33fSMarcel Ziswiler the FDC chipset. (default value 0) 3095 7f6c2cbcSwdenk 3096 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and 3097 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their 3098 7f6c2cbcSwdenk default value. 3099 7f6c2cbcSwdenk 3100 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if CONFIG_SYS_FDC_HW_INIT is defined, then the function 3101 7f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 3102 7f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 3103 7f6c2cbcSwdenk source code. It is used to make hardware dependant 3104 7f6c2cbcSwdenk initializations. 3105 7f6c2cbcSwdenk 3106 0abddf82SMacpaul Lin- CONFIG_IDE_AHB: 3107 0abddf82SMacpaul Lin Most IDE controllers were designed to be connected with PCI 3108 0abddf82SMacpaul Lin interface. Only few of them were designed for AHB interface. 3109 0abddf82SMacpaul Lin When software is doing ATA command and data transfer to 3110 0abddf82SMacpaul Lin IDE devices through IDE-AHB controller, some additional 3111 0abddf82SMacpaul Lin registers accessing to these kind of IDE-AHB controller 3112 0abddf82SMacpaul Lin is requierd. 3113 0abddf82SMacpaul Lin 3114 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_IMMR: Physical address of the Internal Memory. 3115 25d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 3116 25d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 3117 c609719bSwdenk 3118 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_INIT_RAM_ADDR: 3119 c609719bSwdenk 3120 7152b1d0Swdenk Start address of memory area that can be used for 3121 c609719bSwdenk initial data and stack; please note that this must be 3122 c609719bSwdenk writable memory that is working WITHOUT special 3123 c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 3124 c609719bSwdenk will become available only after programming the 3125 c609719bSwdenk memory controller and running certain initialization 3126 c609719bSwdenk sequences. 3127 c609719bSwdenk 3128 c609719bSwdenk U-Boot uses the following memory types: 3129 c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 3130 c609719bSwdenk - MPC824X: data cache 3131 c609719bSwdenk - PPC4xx: data cache 3132 c609719bSwdenk 3133 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_GBL_DATA_OFFSET: 3134 c609719bSwdenk 3135 c609719bSwdenk Offset of the initial data structure in the memory 3136 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually 3137 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial 3138 c609719bSwdenk data is located at the end of the available space 3139 553f0982SWolfgang Denk (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - 3140 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just 3141 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + 3142 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_GBL_DATA_OFFSET) downward. 3143 c609719bSwdenk 3144 c609719bSwdenk Note: 3145 c609719bSwdenk On the MPC824X (or other systems that use the data 3146 c609719bSwdenk cache for initial memory) the address chosen for 3147 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must 3148 c609719bSwdenk point to an otherwise UNUSED address space between 3149 c609719bSwdenk the top of RAM and the start of the PCI space. 3150 c609719bSwdenk 3151 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) 3152 c609719bSwdenk 3153 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SYPCR: System Protection Control (11-9) 3154 c609719bSwdenk 3155 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) 3156 c609719bSwdenk 3157 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) 3158 c609719bSwdenk 3159 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 3160 c609719bSwdenk 3161 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) 3162 c609719bSwdenk 3163 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_OR_TIMING_SDRAM: 3164 c609719bSwdenk SDRAM timing 3165 c609719bSwdenk 3166 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA: 3167 c609719bSwdenk periodic timer for refresh 3168 c609719bSwdenk 3169 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_DER: Debug Event Register (37-47) 3170 c609719bSwdenk 3171 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, 3172 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, 3173 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, 3174 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BR1_PRELIM: 3175 c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 3176 c609719bSwdenk 3177 c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 3178 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, 3179 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: 3180 c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 3181 c609719bSwdenk 3182 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, 3183 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: 3184 c609719bSwdenk Machine Mode Register and Memory Periodic Timer 3185 c609719bSwdenk Prescaler definitions (SDRAM timing) 3186 c609719bSwdenk 3187 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: 3188 c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 3189 c609719bSwdenk define relocation offset in DPRAM [DSP2] 3190 c609719bSwdenk 3191 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: 3192 b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 3193 b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 3194 b423d055SHeiko Schocher 3195 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: 3196 c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 3197 c609719bSwdenk define relocation offset in DPRAM [SCC4] 3198 c609719bSwdenk 3199 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_USE_OSCCLK: 3200 c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 3201 c609719bSwdenk wrong setting might damage your board. Read 3202 c609719bSwdenk doc/README.MBX before setting this variable! 3203 c609719bSwdenk 3204 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 3205 ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 3206 ea909b76Swdenk (Power On Self Tests). This definition overrides 3207 ea909b76Swdenk #define'd default value in commproc.h resp. 3208 ea909b76Swdenk cpm_8260.h. 3209 ea909b76Swdenk 3210 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, 3211 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, 3212 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, 3213 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, 3214 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 3215 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, 3216 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, 3217 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) 3218 a47a12beSStefan Roese Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. 3219 5d232d0eSwdenk 3220 9cacf4fcSDirk Eibach- CONFIG_PCI_DISABLE_PCIE: 3221 9cacf4fcSDirk Eibach Disable PCI-Express on systems where it is supported but not 3222 9cacf4fcSDirk Eibach required. 3223 9cacf4fcSDirk Eibach 3224 a09b9b68SKumar Gala- CONFIG_SYS_SRIO: 3225 a09b9b68SKumar Gala Chip has SRIO or not 3226 a09b9b68SKumar Gala 3227 a09b9b68SKumar Gala- CONFIG_SRIO1: 3228 a09b9b68SKumar Gala Board has SRIO 1 port available 3229 a09b9b68SKumar Gala 3230 a09b9b68SKumar Gala- CONFIG_SRIO2: 3231 a09b9b68SKumar Gala Board has SRIO 2 port available 3232 a09b9b68SKumar Gala 3233 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_VIRT: 3234 a09b9b68SKumar Gala Virtual Address of SRIO port 'n' memory region 3235 a09b9b68SKumar Gala 3236 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_PHYS: 3237 a09b9b68SKumar Gala Physical Address of SRIO port 'n' memory region 3238 a09b9b68SKumar Gala 3239 a09b9b68SKumar Gala- CONFIG_SYS_SRIOn_MEM_SIZE: 3240 a09b9b68SKumar Gala Size of SRIO port 'n' memory region 3241 a09b9b68SKumar Gala 3242 eced4626SAlex Waterman- CONFIG_SYS_NDFC_16 3243 eced4626SAlex Waterman Defined to tell the NDFC that the NAND chip is using a 3244 eced4626SAlex Waterman 16 bit bus. 3245 eced4626SAlex Waterman 3246 eced4626SAlex Waterman- CONFIG_SYS_NDFC_EBC0_CFG 3247 eced4626SAlex Waterman Sets the EBC0_CFG register for the NDFC. If not defined 3248 eced4626SAlex Waterman a default value will be used. 3249 eced4626SAlex Waterman 3250 bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 3251 218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 3252 218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 3253 218ca724SWolfgang Denk 3254 bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 3255 bb99ad6dSBen Warren I2C address of the SPD EEPROM 3256 bb99ad6dSBen Warren 3257 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_SPD_BUS_NUM 3258 218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 3259 218ca724SWolfgang Denk one, specify here. Note that the value must resolve 3260 218ca724SWolfgang Denk to something your driver can deal with. 3261 bb99ad6dSBen Warren 3262 1b3e3c4fSYork Sun- CONFIG_SYS_DDR_RAW_TIMING 3263 1b3e3c4fSYork Sun Get DDR timing information from other than SPD. Common with 3264 1b3e3c4fSYork Sun soldered DDR chips onboard without SPD. DDR raw timing 3265 1b3e3c4fSYork Sun parameters are extracted from datasheet and hard-coded into 3266 1b3e3c4fSYork Sun header files or board specific files. 3267 1b3e3c4fSYork Sun 3268 6f5e1dc5SYork Sun- CONFIG_FSL_DDR_INTERACTIVE 3269 6f5e1dc5SYork Sun Enable interactive DDR debugging. See doc/README.fsl-ddr. 3270 6f5e1dc5SYork Sun 3271 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD- CONFIG_SYS_83XX_DDR_USES_CS0 3272 218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 3273 218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 3274 2ad6b513STimur Tabi 3275 c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 3276 c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 3277 c26e454dSwdenk 3278 c26e454dSwdenk- CONFIG_FEC[12]_PHY 3279 c26e454dSwdenk Define to the hardcoded PHY address which corresponds 3280 6e592385Swdenk to the given FEC; i. e. 3281 c26e454dSwdenk #define CONFIG_FEC1_PHY 4 3282 c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 3283 c26e454dSwdenk 3284 c26e454dSwdenk When set to -1, means to probe for first available. 3285 c26e454dSwdenk 3286 c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 3287 c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 3288 c26e454dSwdenk (so program the FEC to ignore it). 3289 c26e454dSwdenk 3290 c26e454dSwdenk- CONFIG_RMII 3291 c26e454dSwdenk Enable RMII mode for all FECs. 3292 c26e454dSwdenk Note that this is a global option, we can't 3293 c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 3294 c26e454dSwdenk 3295 5cf91d6bSwdenk- CONFIG_CRC32_VERIFY 3296 5cf91d6bSwdenk Add a verify option to the crc32 command. 3297 5cf91d6bSwdenk The syntax is: 3298 5cf91d6bSwdenk 3299 5cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 3300 5cf91d6bSwdenk 3301 5cf91d6bSwdenk Where address/count indicate a memory area 3302 5cf91d6bSwdenk and crc32 is the correct crc32 which the 3303 5cf91d6bSwdenk area should have. 3304 5cf91d6bSwdenk 3305 56523f12Swdenk- CONFIG_LOOPW 3306 56523f12Swdenk Add the "loopw" memory command. This only takes effect if 3307 602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 3308 56523f12Swdenk 3309 7b466641Sstroese- CONFIG_MX_CYCLIC 3310 7b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 3311 7b466641Sstroese "md/mw" commands. 3312 7b466641Sstroese Examples: 3313 7b466641Sstroese 3314 7b466641Sstroese => mdc.b 10 4 500 3315 7b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 3316 7b466641Sstroese 3317 7b466641Sstroese => mwc.l 100 12345678 10 3318 7b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 3319 7b466641Sstroese 3320 7b466641Sstroese This only takes effect if the memory commands are activated 3321 602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 3322 7b466641Sstroese 3323 8aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 3324 afc1ce82SMacpaul Lin [ARM, NDS32, MIPS only] If this variable is defined, then certain 3325 e03f3169SWolfgang Denk low level initializations (like setting up the memory 3326 e03f3169SWolfgang Denk controller) are omitted and/or U-Boot does not 3327 e03f3169SWolfgang Denk relocate itself into RAM. 3328 8aa1a2d1Swdenk 3329 e03f3169SWolfgang Denk Normally this variable MUST NOT be defined. The only 3330 e03f3169SWolfgang Denk exception is when U-Boot is loaded (to RAM) by some 3331 e03f3169SWolfgang Denk other boot loader or by a debugger which performs 3332 e03f3169SWolfgang Denk these initializations itself. 3333 8aa1a2d1Swdenk 3334 401bb30bSAneesh V- CONFIG_SPL_BUILD 3335 df81238bSMagnus Lilja Modifies the behaviour of start.S when compiling a loader 3336 df81238bSMagnus Lilja that is executed before the actual U-Boot. E.g. when 3337 df81238bSMagnus Lilja compiling a NAND SPL. 3338 400558b5Swdenk 3339 68bb8295SHeiko Schocher- CONFIG_SYS_NAND_HW_ECC_OOBFIRST 3340 68bb8295SHeiko Schocher define this, if you want to read first the oob data 3341 68bb8295SHeiko Schocher and then the data. This is used for example on 3342 68bb8295SHeiko Schocher davinci plattforms. 3343 68bb8295SHeiko Schocher 3344 d8834a13SMatthias Weisser- CONFIG_USE_ARCH_MEMCPY 3345 d8834a13SMatthias Weisser CONFIG_USE_ARCH_MEMSET 3346 d8834a13SMatthias Weisser If these options are used a optimized version of memcpy/memset will 3347 d8834a13SMatthias Weisser be used if available. These functions may be faster under some 3348 d8834a13SMatthias Weisser conditions but may increase the binary size. 3349 d8834a13SMatthias Weisser 3350 f2717b47STimur TabiFreescale QE/FMAN Firmware Support: 3351 f2717b47STimur Tabi----------------------------------- 3352 f2717b47STimur Tabi 3353 f2717b47STimur TabiThe Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the 3354 f2717b47STimur Tabiloading of "firmware", which is encoded in the QE firmware binary format. 3355 f2717b47STimur TabiThis firmware often needs to be loaded during U-Boot booting, so macros 3356 f2717b47STimur Tabiare used to identify the storage device (NOR flash, SPI, etc) and the address 3357 f2717b47STimur Tabiwithin that device. 3358 f2717b47STimur Tabi 3359 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_ADDR 3360 f2717b47STimur Tabi The address in the storage device where the firmware is located. The 3361 f2717b47STimur Tabi meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro 3362 f2717b47STimur Tabi is also specified. 3363 f2717b47STimur Tabi 3364 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_LENGTH 3365 f2717b47STimur Tabi The maximum possible size of the firmware. The firmware binary format 3366 f2717b47STimur Tabi has a field that specifies the actual size of the firmware, but it 3367 f2717b47STimur Tabi might not be possible to read any part of the firmware unless some 3368 f2717b47STimur Tabi local storage is allocated to hold the entire firmware first. 3369 f2717b47STimur Tabi 3370 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NOR 3371 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NOR flash, mapped as 3372 f2717b47STimur Tabi normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the 3373 f2717b47STimur Tabi virtual address in NOR flash. 3374 f2717b47STimur Tabi 3375 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_NAND 3376 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located in NAND flash. 3377 f2717b47STimur Tabi CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. 3378 f2717b47STimur Tabi 3379 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_MMC 3380 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SD/MMC 3381 f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3382 f2717b47STimur Tabi 3383 f2717b47STimur Tabi- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH 3384 f2717b47STimur Tabi Specifies that QE/FMAN firmware is located on the primary SPI 3385 f2717b47STimur Tabi device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. 3386 f2717b47STimur Tabi 3387 f2717b47STimur Tabi 3388 c609719bSwdenkBuilding the Software: 3389 c609719bSwdenk====================== 3390 c609719bSwdenk 3391 218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 3392 218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 3393 218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 3394 218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 3395 218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 3396 218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 3397 c609719bSwdenk 3398 218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 3399 218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 3400 218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 3401 218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 3402 218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 3403 c609719bSwdenk 3404 218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 3405 218ca724SWolfgang Denk $ export CROSS_COMPILE 3406 c609719bSwdenk 3407 2f8d396bSPeter TyserNote: If you wish to generate Windows versions of the utilities in 3408 2f8d396bSPeter Tyser the tools directory you can use the MinGW toolchain 3409 2f8d396bSPeter Tyser (http://www.mingw.org). Set your HOST tools to the MinGW 3410 2f8d396bSPeter Tyser toolchain and execute 'make tools'. For example: 3411 2f8d396bSPeter Tyser 3412 2f8d396bSPeter Tyser $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools 3413 2f8d396bSPeter Tyser 3414 2f8d396bSPeter Tyser Binaries such as tools/mkimage.exe will be created which can 3415 2f8d396bSPeter Tyser be executed on computers running Windows. 3416 2f8d396bSPeter Tyser 3417 c609719bSwdenkU-Boot is intended to be simple to build. After installing the 3418 c609719bSwdenksources you must configure U-Boot for one specific board type. This 3419 c609719bSwdenkis done by typing: 3420 c609719bSwdenk 3421 c609719bSwdenk make NAME_config 3422 c609719bSwdenk 3423 218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 3424 218ca724SWolfgang Denkrations; see the main Makefile for supported names. 3425 54387ac9Swdenk 3426 c609719bSwdenkNote: for some board special configuration names may exist; check if 3427 c609719bSwdenk additional information is available from the board vendor; for 3428 2729af9dSwdenk instance, the TQM823L systems are available without (standard) 3429 2729af9dSwdenk or with LCD support. You can select such additional "features" 3430 11ccc33fSMarcel Ziswiler when choosing the configuration, i. e. 3431 c609719bSwdenk 3432 2729af9dSwdenk make TQM823L_config 3433 2729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 3434 c609719bSwdenk 3435 c609719bSwdenk make TQM823L_LCD_config 3436 c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 3437 c609719bSwdenk 3438 c609719bSwdenk etc. 3439 c609719bSwdenk 3440 c609719bSwdenk 3441 c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 3442 7152b1d0Swdenkimages ready for download to / installation on your system: 3443 c609719bSwdenk 3444 c609719bSwdenk- "u-boot.bin" is a raw binary image 3445 c609719bSwdenk- "u-boot" is an image in ELF binary format 3446 c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 3447 c609719bSwdenk 3448 baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 3449 baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 3450 baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 3451 baf31249SMarian Balakowicz 3452 baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 3453 baf31249SMarian Balakowicz 3454 baf31249SMarian Balakowicz make O=/tmp/build distclean 3455 baf31249SMarian Balakowicz make O=/tmp/build NAME_config 3456 baf31249SMarian Balakowicz make O=/tmp/build all 3457 baf31249SMarian Balakowicz 3458 baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 3459 baf31249SMarian Balakowicz 3460 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3461 baf31249SMarian Balakowicz make distclean 3462 baf31249SMarian Balakowicz make NAME_config 3463 baf31249SMarian Balakowicz make all 3464 baf31249SMarian Balakowicz 3465 baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 3466 baf31249SMarian Balakowiczvariable. 3467 baf31249SMarian Balakowicz 3468 c609719bSwdenk 3469 c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 3470 c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 3471 c609719bSwdenknative "make". 3472 c609719bSwdenk 3473 c609719bSwdenk 3474 c609719bSwdenkIf the system board that you have is not listed, then you will need 3475 c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 3476 c609719bSwdenksteps: 3477 c609719bSwdenk 3478 c609719bSwdenk1. Add a new configuration option for your board to the toplevel 3479 85ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 3480 85ec0bccSwdenk entries as examples. Note that here and at many other places 3481 7152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 3482 85ec0bccSwdenk keep this order. 3483 c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 3484 85ec0bccSwdenk files you need. In your board directory, you will need at least 3485 85ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 3486 85ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 3487 85ec0bccSwdenk your board 3488 c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 3489 c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 3490 85ec0bccSwdenk4. Run "make <board>_config" with your new name. 3491 c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 3492 c609719bSwdenk to be installed on your target system. 3493 85ec0bccSwdenk6. Debug and solve any problems that might arise. 3494 c609719bSwdenk [Of course, this last step is much harder than it sounds.] 3495 c609719bSwdenk 3496 c609719bSwdenk 3497 c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 3498 c609719bSwdenk============================================================== 3499 c609719bSwdenk 3500 c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 3501 c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 3502 c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 3503 c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 3504 218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 3505 c609719bSwdenk 3506 c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 3507 c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 3508 c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 3509 c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 3510 c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 3511 7152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 3512 218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 3513 218ca724SWolfgang Denkyou can type 3514 c609719bSwdenk 3515 c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 3516 c609719bSwdenk 3517 c609719bSwdenkor to build on a native PowerPC system you can type 3518 c609719bSwdenk 3519 c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 3520 c609719bSwdenk 3521 218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 3522 218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 3523 218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 3524 218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 3525 218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 3526 218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 3527 218ca724SWolfgang Denkvariable. For example: 3528 baf31249SMarian Balakowicz 3529 baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 3530 baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 3531 baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 3532 baf31249SMarian Balakowicz 3533 218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 3534 218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 3535 218ca724SWolfgang Denkduring the whole build process. 3536 baf31249SMarian Balakowicz 3537 baf31249SMarian Balakowicz 3538 c609719bSwdenkSee also "U-Boot Porting Guide" below. 3539 c609719bSwdenk 3540 c609719bSwdenk 3541 c609719bSwdenkMonitor Commands - Overview: 3542 c609719bSwdenk============================ 3543 c609719bSwdenk 3544 c609719bSwdenkgo - start application at address 'addr' 3545 c609719bSwdenkrun - run commands in an environment variable 3546 c609719bSwdenkbootm - boot application image from memory 3547 c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 3548 c609719bSwdenktftpboot- boot image via network using TFTP protocol 3549 c609719bSwdenk and env variables "ipaddr" and "serverip" 3550 c609719bSwdenk (and eventually "gatewayip") 3551 1fb7cd49SSimon Glasstftpput - upload a file via network using TFTP protocol 3552 c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 3553 c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 3554 c609719bSwdenkloads - load S-Record file over serial line 3555 c609719bSwdenkloadb - load binary file over serial line (kermit mode) 3556 c609719bSwdenkmd - memory display 3557 c609719bSwdenkmm - memory modify (auto-incrementing) 3558 c609719bSwdenknm - memory modify (constant address) 3559 c609719bSwdenkmw - memory write (fill) 3560 c609719bSwdenkcp - memory copy 3561 c609719bSwdenkcmp - memory compare 3562 c609719bSwdenkcrc32 - checksum calculation 3563 0f89c54bSPeter Tyseri2c - I2C sub-system 3564 c609719bSwdenksspi - SPI utility commands 3565 c609719bSwdenkbase - print or set address offset 3566 c609719bSwdenkprintenv- print environment variables 3567 c609719bSwdenksetenv - set environment variables 3568 c609719bSwdenksaveenv - save environment variables to persistent storage 3569 c609719bSwdenkprotect - enable or disable FLASH write protection 3570 c609719bSwdenkerase - erase FLASH memory 3571 c609719bSwdenkflinfo - print FLASH memory information 3572 c609719bSwdenkbdinfo - print Board Info structure 3573 c609719bSwdenkiminfo - print header information for application image 3574 c609719bSwdenkconinfo - print console devices and informations 3575 c609719bSwdenkide - IDE sub-system 3576 c609719bSwdenkloop - infinite loop on address range 3577 56523f12Swdenkloopw - infinite write loop on address range 3578 c609719bSwdenkmtest - simple RAM test 3579 c609719bSwdenkicache - enable or disable instruction cache 3580 c609719bSwdenkdcache - enable or disable data cache 3581 c609719bSwdenkreset - Perform RESET of the CPU 3582 c609719bSwdenkecho - echo args to console 3583 c609719bSwdenkversion - print monitor version 3584 c609719bSwdenkhelp - print online help 3585 c609719bSwdenk? - alias for 'help' 3586 c609719bSwdenk 3587 c609719bSwdenk 3588 c609719bSwdenkMonitor Commands - Detailed Description: 3589 c609719bSwdenk======================================== 3590 c609719bSwdenk 3591 c609719bSwdenkTODO. 3592 c609719bSwdenk 3593 c609719bSwdenkFor now: just type "help <command>". 3594 c609719bSwdenk 3595 c609719bSwdenk 3596 c609719bSwdenkEnvironment Variables: 3597 c609719bSwdenk====================== 3598 c609719bSwdenk 3599 c609719bSwdenkU-Boot supports user configuration using Environment Variables which 3600 c609719bSwdenkcan be made persistent by saving to Flash memory. 3601 c609719bSwdenk 3602 c609719bSwdenkEnvironment Variables are set using "setenv", printed using 3603 c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 3604 c609719bSwdenkwithout a value can be used to delete a variable from the 3605 c609719bSwdenkenvironment. As long as you don't save the environment you are 3606 c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 3607 c609719bSwdenkenvironment is erased by accident, a default environment is provided. 3608 c609719bSwdenk 3609 c96f86eeSWolfgang DenkSome configuration options can be set using Environment Variables. 3610 c96f86eeSWolfgang Denk 3611 c96f86eeSWolfgang DenkList of environment variables (most likely not complete): 3612 c609719bSwdenk 3613 c609719bSwdenk baudrate - see CONFIG_BAUDRATE 3614 c609719bSwdenk 3615 c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 3616 c609719bSwdenk 3617 c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 3618 c609719bSwdenk 3619 c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 3620 c609719bSwdenk 3621 c609719bSwdenk bootfile - Name of the image to load with TFTP 3622 c609719bSwdenk 3623 7d721e34SBartlomiej Sieka bootm_low - Memory range available for image processing in the bootm 3624 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3625 7d721e34SBartlomiej Sieka a hexadecimal number and defines lowest address allowed 3626 7d721e34SBartlomiej Sieka for use by the bootm command. See also "bootm_size" 3627 7d721e34SBartlomiej Sieka environment variable. Address defined by "bootm_low" is 3628 7d721e34SBartlomiej Sieka also the base of the initial memory mapping for the Linux 3629 c3624e6eSGrant Likely kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and 3630 c3624e6eSGrant Likely bootm_mapsize. 3631 c3624e6eSGrant Likely 3632 c3624e6eSGrant Likely bootm_mapsize - Size of the initial memory mapping for the Linux kernel. 3633 c3624e6eSGrant Likely This variable is given as a hexadecimal number and it 3634 c3624e6eSGrant Likely defines the size of the memory region starting at base 3635 c3624e6eSGrant Likely address bootm_low that is accessible by the Linux kernel 3636 c3624e6eSGrant Likely during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used 3637 c3624e6eSGrant Likely as the default value if it is defined, and bootm_size is 3638 c3624e6eSGrant Likely used otherwise. 3639 7d721e34SBartlomiej Sieka 3640 7d721e34SBartlomiej Sieka bootm_size - Memory range available for image processing in the bootm 3641 7d721e34SBartlomiej Sieka command can be restricted. This variable is given as 3642 7d721e34SBartlomiej Sieka a hexadecimal number and defines the size of the region 3643 7d721e34SBartlomiej Sieka allowed for use by the bootm command. See also "bootm_low" 3644 7d721e34SBartlomiej Sieka environment variable. 3645 7d721e34SBartlomiej Sieka 3646 4bae9090SBartlomiej Sieka updatefile - Location of the software update file on a TFTP server, used 3647 4bae9090SBartlomiej Sieka by the automatic software update feature. Please refer to 3648 4bae9090SBartlomiej Sieka documentation in doc/README.update for more details. 3649 4bae9090SBartlomiej Sieka 3650 c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 3651 c609719bSwdenk "bootp" will just load perform a lookup of the 3652 c609719bSwdenk configuration from the BOOTP server, but not try to 3653 c609719bSwdenk load any image using TFTP 3654 c609719bSwdenk 3655 c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 3656 c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 3657 c609719bSwdenk be automatically started (by internally calling 3658 c609719bSwdenk "bootm") 3659 c609719bSwdenk 3660 4a6fd34bSwdenk If set to "no", a standalone image passed to the 3661 4a6fd34bSwdenk "bootm" command will be copied to the load address 3662 4a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 3663 4a6fd34bSwdenk This can be used to load and uncompress arbitrary 3664 4a6fd34bSwdenk data. 3665 4a6fd34bSwdenk 3666 a28afca5SDavid A. Long fdt_high - if set this restricts the maximum address that the 3667 a28afca5SDavid A. Long flattened device tree will be copied into upon boot. 3668 *fa34f6b2SShawn Guo For example, if you have a system with 1 GB memory 3669 *fa34f6b2SShawn Guo at physical address 0x10000000, while Linux kernel 3670 *fa34f6b2SShawn Guo only recognizes the first 704 MB as low memory, you 3671 *fa34f6b2SShawn Guo may need to set fdt_high as 0x3C000000 to have the 3672 *fa34f6b2SShawn Guo device tree blob be copied to the maximum address 3673 *fa34f6b2SShawn Guo of the 704 MB low memory, so that Linux kernel can 3674 *fa34f6b2SShawn Guo access it during the boot procedure. 3675 *fa34f6b2SShawn Guo 3676 a28afca5SDavid A. Long If this is set to the special value 0xFFFFFFFF then 3677 a28afca5SDavid A. Long the fdt will not be copied at all on boot. For this 3678 a28afca5SDavid A. Long to work it must reside in writable memory, have 3679 a28afca5SDavid A. Long sufficient padding on the end of it for u-boot to 3680 a28afca5SDavid A. Long add the information it needs into it, and the memory 3681 a28afca5SDavid A. Long must be accessible by the kernel. 3682 a28afca5SDavid A. Long 3683 eea63e05SSimon Glass fdtcontroladdr- if set this is the address of the control flattened 3684 eea63e05SSimon Glass device tree used by U-Boot when CONFIG_OF_CONTROL is 3685 eea63e05SSimon Glass defined. 3686 eea63e05SSimon Glass 3687 17ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 3688 17ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 3689 17ea1177Swdenk mode (400kHZ). This environment variable is used in 3690 17ea1177Swdenk initialization code. So, for changes to be effective 3691 17ea1177Swdenk it must be saved and board must be reset. 3692 17ea1177Swdenk 3693 c609719bSwdenk initrd_high - restrict positioning of initrd images: 3694 c609719bSwdenk If this variable is not set, initrd images will be 3695 c609719bSwdenk copied to the highest possible address in RAM; this 3696 c609719bSwdenk is usually what you want since it allows for 3697 c609719bSwdenk maximum initrd size. If for some reason you want to 3698 c609719bSwdenk make sure that the initrd image is loaded below the 3699 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_BOOTMAPSZ limit, you can set this environment 3700 c609719bSwdenk variable to a value of "no" or "off" or "0". 3701 c609719bSwdenk Alternatively, you can set it to a maximum upper 3702 c609719bSwdenk address to use (U-Boot will still check that it 3703 c609719bSwdenk does not overwrite the U-Boot stack and data). 3704 c609719bSwdenk 3705 c609719bSwdenk For instance, when you have a system with 16 MB 3706 7152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 3707 c609719bSwdenk you can do this by adding "mem=12M" to the value of 3708 c609719bSwdenk the "bootargs" variable. However, now you must make 3709 7152b1d0Swdenk sure that the initrd image is placed in the first 3710 c609719bSwdenk 12 MB as well - this can be done with 3711 c609719bSwdenk 3712 c609719bSwdenk setenv initrd_high 00c00000 3713 c609719bSwdenk 3714 38b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 3715 38b99261Swdenk indication to U-Boot that all addresses are legal 3716 38b99261Swdenk for the Linux kernel, including addresses in flash 3717 38b99261Swdenk memory. In this case U-Boot will NOT COPY the 3718 38b99261Swdenk ramdisk at all. This may be useful to reduce the 3719 38b99261Swdenk boot time on your system, but requires that this 3720 38b99261Swdenk feature is supported by your Linux kernel. 3721 38b99261Swdenk 3722 c609719bSwdenk ipaddr - IP address; needed for tftpboot command 3723 c609719bSwdenk 3724 c609719bSwdenk loadaddr - Default load address for commands like "bootp", 3725 dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 3726 c609719bSwdenk 3727 c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 3728 c609719bSwdenk 3729 c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 3730 c609719bSwdenk 3731 c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 3732 c609719bSwdenk 3733 c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 3734 c609719bSwdenk 3735 c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 3736 c609719bSwdenk 3737 e2a53458SMike Frysinger ethprime - controls which interface is used first. 3738 a3d991bdSwdenk 3739 e2a53458SMike Frysinger ethact - controls which interface is currently active. 3740 e2a53458SMike Frysinger For example you can do the following 3741 a3d991bdSwdenk 3742 48690d80SHeiko Schocher => setenv ethact FEC 3743 48690d80SHeiko Schocher => ping 192.168.0.1 # traffic sent on FEC 3744 48690d80SHeiko Schocher => setenv ethact SCC 3745 48690d80SHeiko Schocher => ping 10.0.0.1 # traffic sent on SCC 3746 a3d991bdSwdenk 3747 e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 3748 e1692577SMatthias Fuchs available network interfaces. 3749 e1692577SMatthias Fuchs It just stays at the currently selected interface. 3750 e1692577SMatthias Fuchs 3751 a3d991bdSwdenk netretry - When set to "no" each network operation will 3752 a3d991bdSwdenk either succeed or fail without retrying. 3753 6e592385Swdenk When set to "once" the network operation will 3754 6e592385Swdenk fail when all the available network interfaces 3755 6e592385Swdenk are tried once without success. 3756 a3d991bdSwdenk Useful on scripts which control the retry operation 3757 a3d991bdSwdenk themselves. 3758 a3d991bdSwdenk 3759 b4e2f89dSJean-Christophe PLAGNIOL-VILLARD npe_ucode - set load address for the NPE microcode 3760 a1cf027aSJean-Christophe PLAGNIOL-VILLARD 3761 28cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 3762 ecb0ccd9SWolfgang Denk UDP source port. 3763 ecb0ccd9SWolfgang Denk 3764 28cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 3765 28cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 3766 28cb9375SWolfgang Denk 3767 c96f86eeSWolfgang Denk tftpblocksize - Block size to use for TFTP transfers; if not set, 3768 c96f86eeSWolfgang Denk we use the TFTP server's default block size 3769 c96f86eeSWolfgang Denk 3770 c96f86eeSWolfgang Denk tftptimeout - Retransmission timeout for TFTP packets (in milli- 3771 c96f86eeSWolfgang Denk seconds, minimum value is 1000 = 1 second). Defines 3772 c96f86eeSWolfgang Denk when a packet is considered to be lost so it has to 3773 c96f86eeSWolfgang Denk be retransmitted. The default is 5000 = 5 seconds. 3774 c96f86eeSWolfgang Denk Lowering this value may make downloads succeed 3775 c96f86eeSWolfgang Denk faster in networks with high packet loss rates or 3776 c96f86eeSWolfgang Denk with unreliable TFTP servers. 3777 c96f86eeSWolfgang Denk 3778 a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 3779 11ccc33fSMarcel Ziswiler Ethernet is encapsulated/received over 802.1q 3780 a3d991bdSwdenk VLAN tagged frames. 3781 c609719bSwdenk 3782 dc0b7b0eSJason HobbsThe following image location variables contain the location of images 3783 dc0b7b0eSJason Hobbsused in booting. The "Image" column gives the role of the image and is 3784 dc0b7b0eSJason Hobbsnot an environment variable name. The other columns are environment 3785 dc0b7b0eSJason Hobbsvariable names. "File Name" gives the name of the file on a TFTP 3786 dc0b7b0eSJason Hobbsserver, "RAM Address" gives the location in RAM the image will be 3787 dc0b7b0eSJason Hobbsloaded to, and "Flash Location" gives the image's address in NOR 3788 dc0b7b0eSJason Hobbsflash or offset in NAND flash. 3789 dc0b7b0eSJason Hobbs 3790 dc0b7b0eSJason Hobbs*Note* - these variables don't have to be defined for all boards, some 3791 dc0b7b0eSJason Hobbsboards currenlty use other variables for these purposes, and some 3792 dc0b7b0eSJason Hobbsboards use these variables for other purposes. 3793 dc0b7b0eSJason Hobbs 3794 dc0b7b0eSJason HobbsImage File Name RAM Address Flash Location 3795 dc0b7b0eSJason Hobbs----- --------- ----------- -------------- 3796 dc0b7b0eSJason Hobbsu-boot u-boot u-boot_addr_r u-boot_addr 3797 dc0b7b0eSJason HobbsLinux kernel bootfile kernel_addr_r kernel_addr 3798 dc0b7b0eSJason Hobbsdevice tree blob fdtfile fdt_addr_r fdt_addr 3799 dc0b7b0eSJason Hobbsramdisk ramdiskfile ramdisk_addr_r ramdisk_addr 3800 dc0b7b0eSJason Hobbs 3801 c609719bSwdenkThe following environment variables may be used and automatically 3802 c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 3803 c609719bSwdenkdepending the information provided by your boot server: 3804 c609719bSwdenk 3805 c609719bSwdenk bootfile - see above 3806 c609719bSwdenk dnsip - IP address of your Domain Name Server 3807 fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 3808 c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 3809 c609719bSwdenk hostname - Target hostname 3810 c609719bSwdenk ipaddr - see above 3811 c609719bSwdenk netmask - Subnet Mask 3812 c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 3813 c609719bSwdenk serverip - see above 3814 c609719bSwdenk 3815 c609719bSwdenk 3816 c609719bSwdenkThere are two special Environment Variables: 3817 c609719bSwdenk 3818 c609719bSwdenk serial# - contains hardware identification information such 3819 c609719bSwdenk as type string and/or serial number 3820 c609719bSwdenk ethaddr - Ethernet address 3821 c609719bSwdenk 3822 c609719bSwdenkThese variables can be set only once (usually during manufacturing of 3823 c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 3824 c609719bSwdenkonce they have been set once. 3825 c609719bSwdenk 3826 c609719bSwdenk 3827 c1551ea8SstroeseFurther special Environment Variables: 3828 c1551ea8Sstroese 3829 c1551ea8Sstroese ver - Contains the U-Boot version string as printed 3830 c1551ea8Sstroese with the "version" command. This variable is 3831 c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 3832 c1551ea8Sstroese 3833 c1551ea8Sstroese 3834 c609719bSwdenkPlease note that changes to some configuration parameters may take 3835 c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 3836 c609719bSwdenk 3837 c609719bSwdenk 3838 f07771ccSwdenkCommand Line Parsing: 3839 f07771ccSwdenk===================== 3840 f07771ccSwdenk 3841 f07771ccSwdenkThere are two different command line parsers available with U-Boot: 3842 7152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 3843 f07771ccSwdenk 3844 f07771ccSwdenkOld, simple command line parser: 3845 f07771ccSwdenk-------------------------------- 3846 f07771ccSwdenk 3847 f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 3848 f07771ccSwdenk- several commands on one line, separated by ';' 3849 fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 3850 f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 3851 f07771ccSwdenk for example: 3852 fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 3853 f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 3854 f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 3855 f07771ccSwdenk 3856 f07771ccSwdenkHush shell: 3857 f07771ccSwdenk----------- 3858 f07771ccSwdenk 3859 f07771ccSwdenk- similar to Bourne shell, with control structures like 3860 f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 3861 f07771ccSwdenk until...do...done, ... 3862 f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 3863 f07771ccSwdenk commands) and local shell variables (through standard shell syntax 3864 f07771ccSwdenk "name=value"); only environment variables can be used with "run" 3865 f07771ccSwdenk command 3866 f07771ccSwdenk 3867 f07771ccSwdenkGeneral rules: 3868 f07771ccSwdenk-------------- 3869 f07771ccSwdenk 3870 f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 3871 f07771ccSwdenk command) contains several commands separated by semicolon, and 3872 f07771ccSwdenk one of these commands fails, then the remaining commands will be 3873 f07771ccSwdenk executed anyway. 3874 f07771ccSwdenk 3875 f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 3876 11ccc33fSMarcel Ziswiler calling run with a list of variables as arguments), any failing 3877 f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 3878 f07771ccSwdenk variables are not executed. 3879 f07771ccSwdenk 3880 c609719bSwdenkNote for Redundant Ethernet Interfaces: 3881 c609719bSwdenk======================================= 3882 c609719bSwdenk 3883 11ccc33fSMarcel ZiswilerSome boards come with redundant Ethernet interfaces; U-Boot supports 3884 c609719bSwdenksuch configurations and is capable of automatic selection of a 3885 7152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 3886 c609719bSwdenk 3887 c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 3888 c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 3889 c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 3890 c609719bSwdenk 3891 c609719bSwdenkIf the network interface stores some valid MAC address (for instance 3892 c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 3893 c609719bSwdenkding setting in the environment; if the corresponding environment 3894 c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 3895 c609719bSwdenk 3896 c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 3897 c609719bSwdenk environment, the SROM's address is used. 3898 c609719bSwdenk 3899 c609719bSwdenko If there is no valid address in the SROM, and a definition in the 3900 c609719bSwdenk environment exists, then the value from the environment variable is 3901 c609719bSwdenk used. 3902 c609719bSwdenk 3903 c609719bSwdenko If both the SROM and the environment contain a MAC address, and 3904 c609719bSwdenk both addresses are the same, this MAC address is used. 3905 c609719bSwdenk 3906 c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 3907 c609719bSwdenk addresses differ, the value from the environment is used and a 3908 c609719bSwdenk warning is printed. 3909 c609719bSwdenk 3910 c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 3911 c609719bSwdenk is raised. 3912 c609719bSwdenk 3913 ecee9324SBen WarrenIf Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses 3914 ecee9324SBen Warrenwill be programmed into hardware as part of the initialization process. This 3915 ecee9324SBen Warrenmay be skipped by setting the appropriate 'ethmacskip' environment variable. 3916 ecee9324SBen WarrenThe naming convention is as follows: 3917 ecee9324SBen Warren"ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. 3918 c609719bSwdenk 3919 c609719bSwdenkImage Formats: 3920 c609719bSwdenk============== 3921 c609719bSwdenk 3922 3310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 3923 3310c549SMarian Balakowiczimages in two formats: 3924 3310c549SMarian Balakowicz 3925 3310c549SMarian BalakowiczNew uImage format (FIT) 3926 3310c549SMarian Balakowicz----------------------- 3927 3310c549SMarian Balakowicz 3928 3310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 3929 3310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 3930 3310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 3931 3310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 3932 3310c549SMarian Balakowicz 3933 3310c549SMarian Balakowicz 3934 3310c549SMarian BalakowiczOld uImage format 3935 3310c549SMarian Balakowicz----------------- 3936 3310c549SMarian Balakowicz 3937 3310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 3938 3310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 3939 3310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 3940 c609719bSwdenk 3941 c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 3942 c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 3943 f5ed9e39SPeter Tyser LynxOS, pSOS, QNX, RTEMS, INTEGRITY; 3944 f5ed9e39SPeter Tyser Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, 3945 f5ed9e39SPeter Tyser INTEGRITY). 3946 7b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 3947 afc1ce82SMacpaul Lin IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 3948 afc1ce82SMacpaul Lin Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). 3949 c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 3950 c609719bSwdenk* Load Address 3951 c609719bSwdenk* Entry Point 3952 c609719bSwdenk* Image Name 3953 c609719bSwdenk* Image Timestamp 3954 c609719bSwdenk 3955 c609719bSwdenkThe header is marked by a special Magic Number, and both the header 3956 c609719bSwdenkand the data portions of the image are secured against corruption by 3957 c609719bSwdenkCRC32 checksums. 3958 c609719bSwdenk 3959 c609719bSwdenk 3960 c609719bSwdenkLinux Support: 3961 c609719bSwdenk============== 3962 c609719bSwdenk 3963 c609719bSwdenkAlthough U-Boot should support any OS or standalone application 3964 7152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 3965 c609719bSwdenkU-Boot. 3966 c609719bSwdenk 3967 c609719bSwdenkU-Boot includes many features that so far have been part of some 3968 c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 3969 c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 3970 c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 3971 7152b1d0Swdenkserves several purposes: 3972 c609719bSwdenk 3973 c609719bSwdenk- the same features can be used for other OS or standalone 3974 c609719bSwdenk applications (for instance: using compressed images to reduce the 3975 c609719bSwdenk Flash memory footprint) 3976 c609719bSwdenk 3977 c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 3978 7152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 3979 c609719bSwdenk 3980 c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 3981 c609719bSwdenk images; of course this also means that different kernel images can 3982 c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 3983 c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 3984 c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3985 c609719bSwdenk software is easier now. 3986 c609719bSwdenk 3987 c609719bSwdenk 3988 c609719bSwdenkLinux HOWTO: 3989 c609719bSwdenk============ 3990 c609719bSwdenk 3991 c609719bSwdenkPorting Linux to U-Boot based systems: 3992 c609719bSwdenk--------------------------------------- 3993 c609719bSwdenk 3994 c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3995 c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3996 c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3997 c609719bSwdenkLinux :-). 3998 c609719bSwdenk 3999 a47a12beSStefan RoeseBut now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). 4000 c609719bSwdenk 4001 c609719bSwdenkJust make sure your machine specific header file (for instance 4002 c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 4003 1dc30693SMarkus HeidelbergInformation structure as we define in include/asm-<arch>/u-boot.h, 4004 1dc30693SMarkus Heidelbergand make sure that your definition of IMAP_ADDR uses the same value 4005 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDas your U-Boot configuration in CONFIG_SYS_IMMR. 4006 c609719bSwdenk 4007 c609719bSwdenk 4008 c609719bSwdenkConfiguring the Linux kernel: 4009 c609719bSwdenk----------------------------- 4010 c609719bSwdenk 4011 c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 4012 c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 4013 c609719bSwdenk 4014 c609719bSwdenk 4015 c609719bSwdenkBuilding a Linux Image: 4016 c609719bSwdenk----------------------- 4017 c609719bSwdenk 4018 24ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 4019 24ee89b9Swdenknot used. If you use recent kernel source, a new build target 4020 24ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 4021 24ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 4022 24ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 4023 24ee89b9Swdenk100% compatible format. 4024 c609719bSwdenk 4025 c609719bSwdenkExample: 4026 c609719bSwdenk 4027 c609719bSwdenk make TQM850L_config 4028 c609719bSwdenk make oldconfig 4029 c609719bSwdenk make dep 4030 24ee89b9Swdenk make uImage 4031 c609719bSwdenk 4032 24ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 4033 24ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 4034 24ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 4035 c609719bSwdenk 4036 24ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 4037 24ee89b9Swdenk 4038 24ee89b9Swdenk* convert the kernel into a raw binary image: 4039 24ee89b9Swdenk 4040 24ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 4041 24ee89b9Swdenk -R .note -R .comment \ 4042 24ee89b9Swdenk -S vmlinux linux.bin 4043 24ee89b9Swdenk 4044 24ee89b9Swdenk* compress the binary image: 4045 24ee89b9Swdenk 4046 24ee89b9Swdenk gzip -9 linux.bin 4047 24ee89b9Swdenk 4048 24ee89b9Swdenk* package compressed binary image for U-Boot: 4049 24ee89b9Swdenk 4050 24ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 4051 24ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 4052 24ee89b9Swdenk -d linux.bin.gz uImage 4053 24ee89b9Swdenk 4054 24ee89b9Swdenk 4055 24ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 4056 24ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 4057 24ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 4058 24ee89b9Swdenkbyte header containing information about target architecture, 4059 24ee89b9Swdenkoperating system, image type, compression method, entry points, time 4060 24ee89b9Swdenkstamp, CRC32 checksums, etc. 4061 24ee89b9Swdenk 4062 24ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 4063 24ee89b9Swdenkprint the header information, or to build new images. 4064 c609719bSwdenk 4065 c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 4066 c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 4067 c609719bSwdenkchecksum verification: 4068 c609719bSwdenk 4069 c609719bSwdenk tools/mkimage -l image 4070 c609719bSwdenk -l ==> list image header information 4071 c609719bSwdenk 4072 c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 4073 c609719bSwdenkfrom a "data file" which is used as image payload: 4074 c609719bSwdenk 4075 c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 4076 c609719bSwdenk -n name -d data_file image 4077 c609719bSwdenk -A ==> set architecture to 'arch' 4078 c609719bSwdenk -O ==> set operating system to 'os' 4079 c609719bSwdenk -T ==> set image type to 'type' 4080 c609719bSwdenk -C ==> set compression type 'comp' 4081 c609719bSwdenk -a ==> set load address to 'addr' (hex) 4082 c609719bSwdenk -e ==> set entry point to 'ep' (hex) 4083 c609719bSwdenk -n ==> set image name to 'name' 4084 c609719bSwdenk -d ==> use image data from 'datafile' 4085 c609719bSwdenk 4086 69459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 4087 69459791Swdenkaddress (0x00000000), but the entry point address depends on the 4088 69459791Swdenkkernel version: 4089 c609719bSwdenk 4090 c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 4091 24ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 4092 c609719bSwdenk 4093 c609719bSwdenkSo a typical call to build a U-Boot image would read: 4094 c609719bSwdenk 4095 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 4096 24ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 4097 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ 4098 24ee89b9Swdenk > examples/uImage.TQM850L 4099 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4100 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4101 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4102 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4103 c609719bSwdenk Load Address: 0x00000000 4104 24ee89b9Swdenk Entry Point: 0x00000000 4105 c609719bSwdenk 4106 c609719bSwdenkTo verify the contents of the image (or check for corruption): 4107 c609719bSwdenk 4108 24ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 4109 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4110 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4111 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4112 c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 4113 c609719bSwdenk Load Address: 0x00000000 4114 24ee89b9Swdenk Entry Point: 0x00000000 4115 c609719bSwdenk 4116 c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 4117 c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 4118 c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 4119 c609719bSwdenkneed to be uncompressed: 4120 c609719bSwdenk 4121 a47a12beSStefan Roese -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz 4122 24ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 4123 24ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 4124 a47a12beSStefan Roese > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ 4125 24ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 4126 24ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 4127 c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 4128 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 4129 c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 4130 c609719bSwdenk Load Address: 0x00000000 4131 24ee89b9Swdenk Entry Point: 0x00000000 4132 c609719bSwdenk 4133 c609719bSwdenk 4134 c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 4135 c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 4136 c609719bSwdenk 4137 c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 4138 c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 4139 c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 4140 c609719bSwdenk Image Name: Simple Ramdisk Image 4141 c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 4142 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4143 c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 4144 c609719bSwdenk Load Address: 0x00000000 4145 c609719bSwdenk Entry Point: 0x00000000 4146 c609719bSwdenk 4147 c609719bSwdenk 4148 c609719bSwdenkInstalling a Linux Image: 4149 c609719bSwdenk------------------------- 4150 c609719bSwdenk 4151 c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 4152 c609719bSwdenkyou must convert the image to S-Record format: 4153 c609719bSwdenk 4154 c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 4155 c609719bSwdenk 4156 c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 4157 c609719bSwdenkimage header, so the resulting S-Record file will be relative to 4158 c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 4159 c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 4160 c609719bSwdenkcommand. 4161 c609719bSwdenk 4162 c609719bSwdenkExample: install the image to address 0x40100000 (which on the 4163 c609719bSwdenkTQM8xxL is in the first Flash bank): 4164 c609719bSwdenk 4165 c609719bSwdenk => erase 40100000 401FFFFF 4166 c609719bSwdenk 4167 c609719bSwdenk .......... done 4168 c609719bSwdenk Erased 8 sectors 4169 c609719bSwdenk 4170 c609719bSwdenk => loads 40100000 4171 c609719bSwdenk ## Ready for S-Record download ... 4172 c609719bSwdenk ~>examples/image.srec 4173 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 4174 c609719bSwdenk ... 4175 c609719bSwdenk 15989 15990 15991 15992 4176 c609719bSwdenk [file transfer complete] 4177 c609719bSwdenk [connected] 4178 c609719bSwdenk ## Start Addr = 0x00000000 4179 c609719bSwdenk 4180 c609719bSwdenk 4181 c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 4182 c609719bSwdenkthis includes a checksum verification so you can be sure no data 4183 c609719bSwdenkcorruption happened: 4184 c609719bSwdenk 4185 c609719bSwdenk => imi 40100000 4186 c609719bSwdenk 4187 c609719bSwdenk ## Checking Image at 40100000 ... 4188 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4189 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4190 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4191 c609719bSwdenk Load Address: 00000000 4192 c609719bSwdenk Entry Point: 0000000c 4193 c609719bSwdenk Verifying Checksum ... OK 4194 c609719bSwdenk 4195 c609719bSwdenk 4196 c609719bSwdenkBoot Linux: 4197 c609719bSwdenk----------- 4198 c609719bSwdenk 4199 c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 4200 c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 4201 c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 4202 c609719bSwdenkparameters. You can check and modify this variable using the 4203 c609719bSwdenk"printenv" and "setenv" commands: 4204 c609719bSwdenk 4205 c609719bSwdenk 4206 c609719bSwdenk => printenv bootargs 4207 c609719bSwdenk bootargs=root=/dev/ram 4208 c609719bSwdenk 4209 c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4210 c609719bSwdenk 4211 c609719bSwdenk => printenv bootargs 4212 c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4213 c609719bSwdenk 4214 c609719bSwdenk => bootm 40020000 4215 c609719bSwdenk ## Booting Linux kernel at 40020000 ... 4216 c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 4217 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4218 c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 4219 c609719bSwdenk Load Address: 00000000 4220 c609719bSwdenk Entry Point: 0000000c 4221 c609719bSwdenk Verifying Checksum ... OK 4222 c609719bSwdenk Uncompressing Kernel Image ... OK 4223 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 4224 c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 4225 c609719bSwdenk time_init: decrementer frequency = 187500000/60 4226 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4227 c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 4228 c609719bSwdenk ... 4229 c609719bSwdenk 4230 11ccc33fSMarcel ZiswilerIf you want to boot a Linux kernel with initial RAM disk, you pass 4231 7152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 4232 c609719bSwdenkformat!) to the "bootm" command: 4233 c609719bSwdenk 4234 c609719bSwdenk => imi 40100000 40200000 4235 c609719bSwdenk 4236 c609719bSwdenk ## Checking Image at 40100000 ... 4237 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4238 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4239 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4240 c609719bSwdenk Load Address: 00000000 4241 c609719bSwdenk Entry Point: 0000000c 4242 c609719bSwdenk Verifying Checksum ... OK 4243 c609719bSwdenk 4244 c609719bSwdenk ## Checking Image at 40200000 ... 4245 c609719bSwdenk Image Name: Simple Ramdisk Image 4246 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4247 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4248 c609719bSwdenk Load Address: 00000000 4249 c609719bSwdenk Entry Point: 00000000 4250 c609719bSwdenk Verifying Checksum ... OK 4251 c609719bSwdenk 4252 c609719bSwdenk => bootm 40100000 40200000 4253 c609719bSwdenk ## Booting Linux kernel at 40100000 ... 4254 c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 4255 c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 4256 c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 4257 c609719bSwdenk Load Address: 00000000 4258 c609719bSwdenk Entry Point: 0000000c 4259 c609719bSwdenk Verifying Checksum ... OK 4260 c609719bSwdenk Uncompressing Kernel Image ... OK 4261 c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 4262 c609719bSwdenk Image Name: Simple Ramdisk Image 4263 c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 4264 c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 4265 c609719bSwdenk Load Address: 00000000 4266 c609719bSwdenk Entry Point: 00000000 4267 c609719bSwdenk Verifying Checksum ... OK 4268 c609719bSwdenk Loading Ramdisk ... OK 4269 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 4270 c609719bSwdenk Boot arguments: root=/dev/ram 4271 c609719bSwdenk time_init: decrementer frequency = 187500000/60 4272 c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 4273 c609719bSwdenk ... 4274 c609719bSwdenk RAMDISK: Compressed image found at block 0 4275 c609719bSwdenk VFS: Mounted root (ext2 filesystem). 4276 c609719bSwdenk 4277 c609719bSwdenk bash# 4278 c609719bSwdenk 4279 0267768eSMatthew McClintockBoot Linux and pass a flat device tree: 4280 0267768eSMatthew McClintock----------- 4281 0267768eSMatthew McClintock 4282 0267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 4283 0267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 4284 0267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 4285 0267768eSMatthew McClintockflat device tree: 4286 0267768eSMatthew McClintock 4287 0267768eSMatthew McClintock=> print oftaddr 4288 0267768eSMatthew McClintockoftaddr=0x300000 4289 0267768eSMatthew McClintock=> print oft 4290 0267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 4291 0267768eSMatthew McClintock=> tftp $oftaddr $oft 4292 0267768eSMatthew McClintockSpeed: 1000, full duplex 4293 0267768eSMatthew McClintockUsing TSEC0 device 4294 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 4295 0267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 4296 0267768eSMatthew McClintockLoad address: 0x300000 4297 0267768eSMatthew McClintockLoading: # 4298 0267768eSMatthew McClintockdone 4299 0267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 4300 0267768eSMatthew McClintock=> tftp $loadaddr $bootfile 4301 0267768eSMatthew McClintockSpeed: 1000, full duplex 4302 0267768eSMatthew McClintockUsing TSEC0 device 4303 0267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 4304 0267768eSMatthew McClintockFilename 'uImage'. 4305 0267768eSMatthew McClintockLoad address: 0x200000 4306 0267768eSMatthew McClintockLoading:############ 4307 0267768eSMatthew McClintockdone 4308 0267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 4309 0267768eSMatthew McClintock=> print loadaddr 4310 0267768eSMatthew McClintockloadaddr=200000 4311 0267768eSMatthew McClintock=> print oftaddr 4312 0267768eSMatthew McClintockoftaddr=0x300000 4313 0267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 4314 0267768eSMatthew McClintock## Booting image at 00200000 ... 4315 0267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 4316 0267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 4317 0267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 4318 0267768eSMatthew McClintock Load Address: 00000000 4319 0267768eSMatthew McClintock Entry Point: 00000000 4320 0267768eSMatthew McClintock Verifying Checksum ... OK 4321 0267768eSMatthew McClintock Uncompressing Kernel Image ... OK 4322 0267768eSMatthew McClintockBooting using flat device tree at 0x300000 4323 0267768eSMatthew McClintockUsing MPC85xx ADS machine description 4324 0267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 4325 0267768eSMatthew McClintock[snip] 4326 0267768eSMatthew McClintock 4327 0267768eSMatthew McClintock 4328 6069ff26SwdenkMore About U-Boot Image Types: 4329 6069ff26Swdenk------------------------------ 4330 6069ff26Swdenk 4331 6069ff26SwdenkU-Boot supports the following image types: 4332 6069ff26Swdenk 4333 6069ff26Swdenk "Standalone Programs" are directly runnable in the environment 4334 6069ff26Swdenk provided by U-Boot; it is expected that (if they behave 4335 6069ff26Swdenk well) you can continue to work in U-Boot after return from 4336 6069ff26Swdenk the Standalone Program. 4337 6069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 4338 6069ff26Swdenk will take over control completely. Usually these programs 4339 6069ff26Swdenk will install their own set of exception handlers, device 4340 6069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 4341 6069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 4342 6069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 4343 6069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 4344 6069ff26Swdenk being started. 4345 6069ff26Swdenk "Multi-File Images" contain several images, typically an OS 4346 6069ff26Swdenk (Linux) kernel image and one or more data images like 4347 6069ff26Swdenk RAMDisks. This construct is useful for instance when you want 4348 6069ff26Swdenk to boot over the network using BOOTP etc., where the boot 4349 6069ff26Swdenk server provides just a single image file, but you want to get 4350 6069ff26Swdenk for instance an OS kernel and a RAMDisk image. 4351 6069ff26Swdenk 4352 6069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 4353 6069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 4354 6069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 4355 6069ff26Swdenk Immediately after the terminating 0 follow the images, one by 4356 6069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 4357 6069ff26Swdenk a multiple of 4 bytes). 4358 6069ff26Swdenk 4359 6069ff26Swdenk "Firmware Images" are binary images containing firmware (like 4360 6069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 4361 6069ff26Swdenk flash memory. 4362 6069ff26Swdenk 4363 6069ff26Swdenk "Script files" are command sequences that will be executed by 4364 6069ff26Swdenk U-Boot's command interpreter; this feature is especially 4365 6069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 4366 6069ff26Swdenk as command interpreter. 4367 6069ff26Swdenk 4368 c609719bSwdenk 4369 c609719bSwdenkStandalone HOWTO: 4370 c609719bSwdenk================= 4371 c609719bSwdenk 4372 c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 4373 c609719bSwdenkrun "standalone" applications, which can use some resources of 4374 c609719bSwdenkU-Boot like console I/O functions or interrupt services. 4375 c609719bSwdenk 4376 c609719bSwdenkTwo simple examples are included with the sources: 4377 c609719bSwdenk 4378 c609719bSwdenk"Hello World" Demo: 4379 c609719bSwdenk------------------- 4380 c609719bSwdenk 4381 c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 4382 c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 4383 c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 4384 c609719bSwdenklike that: 4385 c609719bSwdenk 4386 c609719bSwdenk => loads 4387 c609719bSwdenk ## Ready for S-Record download ... 4388 c609719bSwdenk ~>examples/hello_world.srec 4389 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4390 c609719bSwdenk [file transfer complete] 4391 c609719bSwdenk [connected] 4392 c609719bSwdenk ## Start Addr = 0x00040004 4393 c609719bSwdenk 4394 c609719bSwdenk => go 40004 Hello World! This is a test. 4395 c609719bSwdenk ## Starting application at 0x00040004 ... 4396 c609719bSwdenk Hello World 4397 c609719bSwdenk argc = 7 4398 c609719bSwdenk argv[0] = "40004" 4399 c609719bSwdenk argv[1] = "Hello" 4400 c609719bSwdenk argv[2] = "World!" 4401 c609719bSwdenk argv[3] = "This" 4402 c609719bSwdenk argv[4] = "is" 4403 c609719bSwdenk argv[5] = "a" 4404 c609719bSwdenk argv[6] = "test." 4405 c609719bSwdenk argv[7] = "<NULL>" 4406 c609719bSwdenk Hit any key to exit ... 4407 c609719bSwdenk 4408 c609719bSwdenk ## Application terminated, rc = 0x0 4409 c609719bSwdenk 4410 c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 4411 c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 4412 c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 4413 c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 4414 c609719bSwdenkcharacter, but this is just a demo program. The application can be 4415 c609719bSwdenkcontrolled by the following keys: 4416 c609719bSwdenk 4417 c609719bSwdenk ? - print current values og the CPM Timer registers 4418 c609719bSwdenk b - enable interrupts and start timer 4419 c609719bSwdenk e - stop timer and disable interrupts 4420 c609719bSwdenk q - quit application 4421 c609719bSwdenk 4422 c609719bSwdenk => loads 4423 c609719bSwdenk ## Ready for S-Record download ... 4424 c609719bSwdenk ~>examples/timer.srec 4425 c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 4426 c609719bSwdenk [file transfer complete] 4427 c609719bSwdenk [connected] 4428 c609719bSwdenk ## Start Addr = 0x00040004 4429 c609719bSwdenk 4430 c609719bSwdenk => go 40004 4431 c609719bSwdenk ## Starting application at 0x00040004 ... 4432 c609719bSwdenk TIMERS=0xfff00980 4433 c609719bSwdenk Using timer 1 4434 c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 4435 c609719bSwdenk 4436 c609719bSwdenkHit 'b': 4437 c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 4438 c609719bSwdenk Enabling timer 4439 c609719bSwdenkHit '?': 4440 c609719bSwdenk [q, b, e, ?] ........ 4441 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 4442 c609719bSwdenkHit '?': 4443 c609719bSwdenk [q, b, e, ?] . 4444 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 4445 c609719bSwdenkHit '?': 4446 c609719bSwdenk [q, b, e, ?] . 4447 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 4448 c609719bSwdenkHit '?': 4449 c609719bSwdenk [q, b, e, ?] . 4450 c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 4451 c609719bSwdenkHit 'e': 4452 c609719bSwdenk [q, b, e, ?] ...Stopping timer 4453 c609719bSwdenkHit 'q': 4454 c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 4455 c609719bSwdenk 4456 c609719bSwdenk 4457 85ec0bccSwdenkMinicom warning: 4458 85ec0bccSwdenk================ 4459 85ec0bccSwdenk 4460 7152b1d0SwdenkOver time, many people have reported problems when trying to use the 4461 85ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 4462 85ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 4463 f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 4464 85ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 4465 85ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 4466 85ec0bccSwdenk 4467 52f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 4468 52f52c14Swdenkconfiguration to your "File transfer protocols" section: 4469 52f52c14Swdenk 4470 52f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 4471 52f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 4472 52f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 4473 52f52c14Swdenk 4474 52f52c14Swdenk 4475 c609719bSwdenkNetBSD Notes: 4476 c609719bSwdenk============= 4477 c609719bSwdenk 4478 c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 4479 c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 4480 c609719bSwdenk 4481 c609719bSwdenkBuilding requires a cross environment; it is known to work on 4482 c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 4483 c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 4484 c609719bSwdenkNote that the cross-powerpc package does not install include files; 4485 c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 4486 c609719bSwdenkmissing. This file has to be installed and patched manually: 4487 c609719bSwdenk 4488 c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 4489 c609719bSwdenk # mkdir powerpc 4490 c609719bSwdenk # ln -s powerpc machine 4491 c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 4492 c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 4493 c609719bSwdenk 4494 c609719bSwdenkNative builds *don't* work due to incompatibilities between native 4495 c609719bSwdenkand U-Boot include files. 4496 c609719bSwdenk 4497 c609719bSwdenkBooting assumes that (the first part of) the image booted is a 4498 c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 4499 c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 4500 c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 4501 2a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 4502 c609719bSwdenk 4503 c609719bSwdenk 4504 c609719bSwdenkImplementation Internals: 4505 c609719bSwdenk========================= 4506 c609719bSwdenk 4507 c609719bSwdenkThe following is not intended to be a complete description of every 4508 c609719bSwdenkimplementation detail. However, it should help to understand the 4509 c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 4510 c609719bSwdenkhardware. 4511 c609719bSwdenk 4512 c609719bSwdenk 4513 c609719bSwdenkInitial Stack, Global Data: 4514 c609719bSwdenk--------------------------- 4515 c609719bSwdenk 4516 c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 4517 c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 4518 c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 4519 c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 4520 c609719bSwdenkis not initialized as zero. To be able to get a C environment working 4521 c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 4522 c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 4523 c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 4524 c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 4525 c609719bSwdenklocked as (mis-) used as memory, etc. 4526 c609719bSwdenk 4527 7152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 4528 0668236bSWolfgang Denk U-Boot mailing list: 4529 43d9616cSwdenk 4530 43d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 4531 43d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 4532 43d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 4533 43d9616cSwdenk ... 4534 43d9616cSwdenk 4535 43d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 4536 43d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 4537 43d9616cSwdenk require any physical RAM backing up the cache. The cleverness 4538 43d9616cSwdenk is that the cache is being used as a temporary supply of 4539 43d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 4540 11ccc33fSMarcel Ziswiler beyond the scope of this list to explain the details, but you 4541 43d9616cSwdenk can see how this works by studying the cache architecture and 4542 43d9616cSwdenk operation in the architecture and processor-specific manuals. 4543 43d9616cSwdenk 4544 43d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 4545 43d9616cSwdenk is another option for the system designer to use as an 4546 11ccc33fSMarcel Ziswiler initial stack/RAM area prior to SDRAM being available. Either 4547 43d9616cSwdenk option should work for you. Using CS 4 should be fine if your 4548 43d9616cSwdenk board designers haven't used it for something that would 4549 43d9616cSwdenk cause you grief during the initial boot! It is frequently not 4550 43d9616cSwdenk used. 4551 43d9616cSwdenk 4552 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARD CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere 4553 43d9616cSwdenk with your processor/board/system design. The default value 4554 43d9616cSwdenk you will find in any recent u-boot distribution in 4555 8a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 4556 43d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 4557 43d9616cSwdenk it above 400_0000. Just make sure your board has no resources 4558 43d9616cSwdenk that are supposed to respond to that address! That code in 4559 43d9616cSwdenk start.S has been around a while and should work as is when 4560 43d9616cSwdenk you get the config right. 4561 43d9616cSwdenk 4562 43d9616cSwdenk -Chris Hallinan 4563 43d9616cSwdenk DS4.COM, Inc. 4564 43d9616cSwdenk 4565 c609719bSwdenkIt is essential to remember this, since it has some impact on the C 4566 c609719bSwdenkcode for the initialization procedures: 4567 c609719bSwdenk 4568 c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 4569 c609719bSwdenk to write it. 4570 c609719bSwdenk 4571 11ccc33fSMarcel Ziswiler* Do not use any uninitialized global data (or implicitely initialized 4572 c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 4573 7152b1d0Swdenk zation is performed later (when relocating to RAM). 4574 c609719bSwdenk 4575 c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 4576 c609719bSwdenk that. 4577 c609719bSwdenk 4578 c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 4579 c609719bSwdenknormal global data to share information beween the code. But it 4580 c609719bSwdenkturned out that the implementation of U-Boot can be greatly 4581 c609719bSwdenksimplified by making a global data structure (gd_t) available to all 4582 c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 4583 c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 4584 c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 4585 c609719bSwdenkplace a pointer (gd) to the global data into a register which we 4586 c609719bSwdenkreserve for this purpose. 4587 c609719bSwdenk 4588 7152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 4589 c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 4590 c609719bSwdenkGCC's implementation. 4591 c609719bSwdenk 4592 c609719bSwdenkFor PowerPC, the following registers have specific use: 4593 c609719bSwdenk R1: stack pointer 4594 e7670f6cSWolfgang Denk R2: reserved for system use 4595 c609719bSwdenk R3-R4: parameter passing and return values 4596 c609719bSwdenk R5-R10: parameter passing 4597 c609719bSwdenk R13: small data area pointer 4598 c609719bSwdenk R30: GOT pointer 4599 c609719bSwdenk R31: frame pointer 4600 c609719bSwdenk 4601 e6bee808SJoakim Tjernlund (U-Boot also uses R12 as internal GOT pointer. r12 4602 e6bee808SJoakim Tjernlund is a volatile register so r12 needs to be reset when 4603 e6bee808SJoakim Tjernlund going back and forth between asm and C) 4604 c609719bSwdenk 4605 e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 4606 c609719bSwdenk 4607 c609719bSwdenk Note: on PPC, we could use a static initializer (since the 4608 c609719bSwdenk address of the global data structure is known at compile time), 4609 c609719bSwdenk but it turned out that reserving a register results in somewhat 4610 c609719bSwdenk smaller code - although the code savings are not that big (on 4611 c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 4612 c609719bSwdenk 624 text + 127 data). 4613 c609719bSwdenk 4614 c4db335cSRobin GetzOn Blackfin, the normal C ABI (except for P3) is followed as documented here: 4615 4c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 4616 4c58eb55SMike Frysinger 4617 c4db335cSRobin Getz ==> U-Boot will use P3 to hold a pointer to the global data 4618 4c58eb55SMike Frysinger 4619 c609719bSwdenkOn ARM, the following registers are used: 4620 c609719bSwdenk 4621 c609719bSwdenk R0: function argument word/integer result 4622 c609719bSwdenk R1-R3: function argument word 4623 c609719bSwdenk R9: GOT pointer 4624 c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 4625 c609719bSwdenk R11: argument (frame) pointer 4626 c609719bSwdenk R12: temporary workspace 4627 c609719bSwdenk R13: stack pointer 4628 c609719bSwdenk R14: link register 4629 c609719bSwdenk R15: program counter 4630 c609719bSwdenk 4631 c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 4632 c609719bSwdenk 4633 0df01fd3SThomas ChouOn Nios II, the ABI is documented here: 4634 0df01fd3SThomas Chou http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf 4635 0df01fd3SThomas Chou 4636 0df01fd3SThomas Chou ==> U-Boot will use gp to hold a pointer to the global data 4637 0df01fd3SThomas Chou 4638 0df01fd3SThomas Chou Note: on Nios II, we give "-G0" option to gcc and don't use gp 4639 0df01fd3SThomas Chou to access small data sections, so gp is free. 4640 0df01fd3SThomas Chou 4641 afc1ce82SMacpaul LinOn NDS32, the following registers are used: 4642 afc1ce82SMacpaul Lin 4643 afc1ce82SMacpaul Lin R0-R1: argument/return 4644 afc1ce82SMacpaul Lin R2-R5: argument 4645 afc1ce82SMacpaul Lin R15: temporary register for assembler 4646 afc1ce82SMacpaul Lin R16: trampoline register 4647 afc1ce82SMacpaul Lin R28: frame pointer (FP) 4648 afc1ce82SMacpaul Lin R29: global pointer (GP) 4649 afc1ce82SMacpaul Lin R30: link register (LP) 4650 afc1ce82SMacpaul Lin R31: stack pointer (SP) 4651 afc1ce82SMacpaul Lin PC: program counter (PC) 4652 afc1ce82SMacpaul Lin 4653 afc1ce82SMacpaul Lin ==> U-Boot will use R10 to hold a pointer to the global data 4654 afc1ce82SMacpaul Lin 4655 d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 4656 d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 4657 c609719bSwdenk 4658 c609719bSwdenkMemory Management: 4659 c609719bSwdenk------------------ 4660 c609719bSwdenk 4661 c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 4662 c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 4663 c609719bSwdenk 4664 c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 4665 c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 4666 c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 4667 c609719bSwdenkphysical memory banks. 4668 c609719bSwdenk 4669 c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 4670 c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 4671 c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 4672 c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 4673 6d0f6bcfSJean-Christophe PLAGNIOL-VILLARDmemory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN 4674 c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 4675 c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 4676 c609719bSwdenk 4677 c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 4678 c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 4679 c609719bSwdenk 4680 c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 4681 c609719bSwdenkthis: 4682 c609719bSwdenk 4683 c609719bSwdenk 0x0000 0000 Exception Vector code 4684 c609719bSwdenk : 4685 c609719bSwdenk 0x0000 1FFF 4686 c609719bSwdenk 0x0000 2000 Free for Application Use 4687 c609719bSwdenk : 4688 c609719bSwdenk : 4689 c609719bSwdenk 4690 c609719bSwdenk : 4691 c609719bSwdenk : 4692 c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 4693 c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 4694 c609719bSwdenk 0x00FC 0000 Malloc Arena 4695 c609719bSwdenk : 4696 c609719bSwdenk 0x00FD FFFF 4697 c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 4698 c609719bSwdenk ... eventually: LCD or video framebuffer 4699 c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 4700 c609719bSwdenk 0x00FF FFFF [End of RAM] 4701 c609719bSwdenk 4702 c609719bSwdenk 4703 c609719bSwdenkSystem Initialization: 4704 c609719bSwdenk---------------------- 4705 c609719bSwdenk 4706 c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 4707 11ccc33fSMarcel Ziswiler(on most PowerPC systems at address 0x00000100). Because of the reset 4708 c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 4709 7152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 4710 c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 4711 c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 4712 c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 4713 c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 4714 c609719bSwdenkthe caches and the SIU. 4715 c609719bSwdenk 4716 c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 4717 c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 4718 c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 4719 c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 4720 c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 4721 c609719bSwdenksimple memory test is run that determines the size of the SDRAM 4722 c609719bSwdenkbanks. 4723 c609719bSwdenk 4724 c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 4725 7152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 4726 c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 4727 c609719bSwdenk0x00000000, with any additional banks following immediately to create 4728 c609719bSwdenkcontiguous memory starting from 0. 4729 c609719bSwdenk 4730 c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 4731 c609719bSwdenkand allocates memory for use by malloc() and for the global Board 4732 c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 4733 c609719bSwdenkpages, and the final stack is set up. 4734 c609719bSwdenk 4735 c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 4736 c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 4737 c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 4738 c609719bSwdenknew address in RAM. 4739 c609719bSwdenk 4740 c609719bSwdenk 4741 c609719bSwdenkU-Boot Porting Guide: 4742 c609719bSwdenk---------------------- 4743 c609719bSwdenk 4744 c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 4745 6aff3115Swdenklist, October 2002] 4746 c609719bSwdenk 4747 c609719bSwdenk 4748 c609719bSwdenkint main(int argc, char *argv[]) 4749 c609719bSwdenk{ 4750 c609719bSwdenk sighandler_t no_more_time; 4751 c609719bSwdenk 4752 c609719bSwdenk signal(SIGALRM, no_more_time); 4753 c609719bSwdenk alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); 4754 c609719bSwdenk 4755 c609719bSwdenk if (available_money > available_manpower) { 4756 6c3fef28SJerry Van Baren Pay consultant to port U-Boot; 4757 c609719bSwdenk return 0; 4758 c609719bSwdenk } 4759 c609719bSwdenk 4760 c609719bSwdenk Download latest U-Boot source; 4761 c609719bSwdenk 4762 0668236bSWolfgang Denk Subscribe to u-boot mailing list; 4763 6aff3115Swdenk 4764 6c3fef28SJerry Van Baren if (clueless) 4765 c609719bSwdenk email("Hi, I am new to U-Boot, how do I get started?"); 4766 c609719bSwdenk 4767 c609719bSwdenk while (learning) { 4768 c609719bSwdenk Read the README file in the top level directory; 4769 7cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual; 4770 6c3fef28SJerry Van Baren Read applicable doc/*.README; 4771 c609719bSwdenk Read the source, Luke; 4772 6c3fef28SJerry Van Baren /* find . -name "*.[chS]" | xargs grep -i <keyword> */ 4773 c609719bSwdenk } 4774 c609719bSwdenk 4775 6c3fef28SJerry Van Baren if (available_money > toLocalCurrency ($2500)) 4776 6c3fef28SJerry Van Baren Buy a BDI3000; 4777 6c3fef28SJerry Van Baren else 4778 c609719bSwdenk Add a lot of aggravation and time; 4779 c609719bSwdenk 4780 6c3fef28SJerry Van Baren if (a similar board exists) { /* hopefully... */ 4781 6c3fef28SJerry Van Baren cp -a board/<similar> board/<myboard> 4782 6c3fef28SJerry Van Baren cp include/configs/<similar>.h include/configs/<myboard>.h 4783 6c3fef28SJerry Van Baren } else { 4784 c609719bSwdenk Create your own board support subdirectory; 4785 6c3fef28SJerry Van Baren Create your own board include/configs/<myboard>.h file; 4786 6c3fef28SJerry Van Baren } 4787 6c3fef28SJerry Van Baren Edit new board/<myboard> files 4788 6c3fef28SJerry Van Baren Edit new include/configs/<myboard>.h 4789 c609719bSwdenk 4790 6c3fef28SJerry Van Baren while (!accepted) { 4791 c609719bSwdenk while (!running) { 4792 c609719bSwdenk do { 4793 c609719bSwdenk Add / modify source code; 4794 c609719bSwdenk } until (compiles); 4795 c609719bSwdenk Debug; 4796 c609719bSwdenk if (clueless) 4797 c609719bSwdenk email("Hi, I am having problems..."); 4798 c609719bSwdenk } 4799 6c3fef28SJerry Van Baren Send patch file to the U-Boot email list; 4800 6c3fef28SJerry Van Baren if (reasonable critiques) 4801 6c3fef28SJerry Van Baren Incorporate improvements from email list code review; 4802 6c3fef28SJerry Van Baren else 4803 6c3fef28SJerry Van Baren Defend code as written; 4804 6c3fef28SJerry Van Baren } 4805 c609719bSwdenk 4806 c609719bSwdenk return 0; 4807 c609719bSwdenk} 4808 c609719bSwdenk 4809 c609719bSwdenkvoid no_more_time (int sig) 4810 c609719bSwdenk{ 4811 c609719bSwdenk hire_a_guru(); 4812 c609719bSwdenk} 4813 c609719bSwdenk 4814 c609719bSwdenk 4815 c609719bSwdenkCoding Standards: 4816 c609719bSwdenk----------------- 4817 c609719bSwdenk 4818 c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 4819 2c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 4820 7ca9296eSWolfgang Denk"scripts/Lindent" in your Linux kernel source directory. 4821 c609719bSwdenk 4822 2c051651SDetlev ZundelSource files originating from a different project (for example the 4823 2c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 4824 2c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 4825 2c051651SDetlev Zundelsources. 4826 2c051651SDetlev Zundel 4827 2c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 4828 2c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 4829 2c051651SDetlev Zundelin your code. 4830 c609719bSwdenk 4831 c178d3daSwdenkPlease also stick to the following formatting rules: 4832 180d3f74Swdenk- remove any trailing white space 4833 7ca9296eSWolfgang Denk- use TAB characters for indentation and vertical alignment, not spaces 4834 180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 4835 7ca9296eSWolfgang Denk- do not add more than 2 consecutive empty lines to source files 4836 180d3f74Swdenk- do not add trailing empty lines to source files 4837 180d3f74Swdenk 4838 c609719bSwdenkSubmissions which do not conform to the standards may be returned 4839 c609719bSwdenkwith a request to reformat the changes. 4840 c609719bSwdenk 4841 c609719bSwdenk 4842 c609719bSwdenkSubmitting Patches: 4843 c609719bSwdenk------------------- 4844 c609719bSwdenk 4845 c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 4846 c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 4847 c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 4848 c609719bSwdenk 4849 0d28f34bSMagnus LiljaPlease see http://www.denx.de/wiki/U-Boot/Patches for details. 4850 218ca724SWolfgang Denk 4851 0668236bSWolfgang DenkPatches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; 4852 0668236bSWolfgang Denksee http://lists.denx.de/mailman/listinfo/u-boot 4853 0668236bSWolfgang Denk 4854 c609719bSwdenkWhen you send a patch, please include the following information with 4855 c609719bSwdenkit: 4856 c609719bSwdenk 4857 c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 4858 c609719bSwdenk this bug. Please try to include a way of demonstrating that the 4859 c609719bSwdenk patch actually fixes something. 4860 c609719bSwdenk 4861 c609719bSwdenk* For new features: a description of the feature and your 4862 c609719bSwdenk implementation. 4863 c609719bSwdenk 4864 c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 4865 c609719bSwdenk 4866 c609719bSwdenk* For major contributions, your entry to the CREDITS file 4867 c609719bSwdenk 4868 c609719bSwdenk* When you add support for a new board, don't forget to add this 4869 7ca9296eSWolfgang Denk board to the MAINTAINERS file, too. 4870 c609719bSwdenk 4871 c609719bSwdenk* If your patch adds new configuration options, don't forget to 4872 c609719bSwdenk document these in the README file. 4873 c609719bSwdenk 4874 218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 4875 218ca724SWolfgang Denk recommended) you can easily generate the patch using the 4876 7ca9296eSWolfgang Denk "git format-patch". If you then use "git send-email" to send it to 4877 218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 4878 218ca724SWolfgang Denk with some other mail clients. 4879 c609719bSwdenk 4880 218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 4881 218ca724SWolfgang Denk diff does not support these options, then get the latest version of 4882 218ca724SWolfgang Denk GNU diff. 4883 6dff5529Swdenk 4884 218ca724SWolfgang Denk The current directory when running this command shall be the parent 4885 218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 4886 218ca724SWolfgang Denk your patch includes sufficient directory information for the 4887 218ca724SWolfgang Denk affected files). 4888 218ca724SWolfgang Denk 4889 218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 4890 218ca724SWolfgang Denk and compressed attachments must not be used. 4891 c609719bSwdenk 4892 52f52c14Swdenk* If one logical set of modifications affects or creates several 4893 52f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 4894 52f52c14Swdenk 4895 52f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 4896 52f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 4897 52f52c14Swdenk 4898 52f52c14Swdenk 4899 c609719bSwdenkNotes: 4900 c609719bSwdenk 4901 c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 4902 c609719bSwdenk source tree and make sure that no errors or warnings are reported 4903 c609719bSwdenk for any of the boards. 4904 c609719bSwdenk 4905 c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 4906 c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 4907 c609719bSwdenk returned with a request to re-formatting / split it. 4908 c609719bSwdenk 4909 c609719bSwdenk* If you modify existing code, make sure that your new code does not 4910 c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 4911 c609719bSwdenk When adding new features, these should compile conditionally only 4912 c609719bSwdenk (using #ifdef), and the resulting code with the new feature 4913 c609719bSwdenk disabled must not need more memory than the old code without your 4914 c609719bSwdenk modification. 4915 90dc6704Swdenk 4916 0668236bSWolfgang Denk* Remember that there is a size limit of 100 kB per message on the 4917 0668236bSWolfgang Denk u-boot mailing list. Bigger patches will be moderated. If they are 4918 0668236bSWolfgang Denk reasonable and not too big, they will be acknowledged. But patches 4919 0668236bSWolfgang Denk bigger than the size limit should be avoided. 4920