1c609719bSwdenk# 2218ca724SWolfgang Denk# (C) Copyright 2000 - 2008 3c609719bSwdenk# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4c609719bSwdenk# 5c609719bSwdenk# See file CREDITS for list of people who contributed to this 6c609719bSwdenk# project. 7c609719bSwdenk# 8c609719bSwdenk# This program is free software; you can redistribute it and/or 9c609719bSwdenk# modify it under the terms of the GNU General Public License as 10c609719bSwdenk# published by the Free Software Foundation; either version 2 of 11c609719bSwdenk# the License, or (at your option) any later version. 12c609719bSwdenk# 13c609719bSwdenk# This program is distributed in the hope that it will be useful, 14c609719bSwdenk# but WITHOUT ANY WARRANTY; without even the implied warranty of 15c609719bSwdenk# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16c609719bSwdenk# GNU General Public License for more details. 17c609719bSwdenk# 18c609719bSwdenk# You should have received a copy of the GNU General Public License 19c609719bSwdenk# along with this program; if not, write to the Free Software 20c609719bSwdenk# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21c609719bSwdenk# MA 02111-1307 USA 22c609719bSwdenk# 23c609719bSwdenk 24c609719bSwdenkSummary: 25c609719bSwdenk======== 26c609719bSwdenk 2724ee89b9SwdenkThis directory contains the source code for U-Boot, a boot loader for 28e86e5a07SwdenkEmbedded boards based on PowerPC, ARM, MIPS and several other 29e86e5a07Swdenkprocessors, which can be installed in a boot ROM and used to 30e86e5a07Swdenkinitialize and test the hardware or to download and run application 31e86e5a07Swdenkcode. 32c609719bSwdenk 33c609719bSwdenkThe development of U-Boot is closely related to Linux: some parts of 3424ee89b9Swdenkthe source code originate in the Linux source tree, we have some 3524ee89b9Swdenkheader files in common, and special provision has been made to 36c609719bSwdenksupport booting of Linux images. 37c609719bSwdenk 38c609719bSwdenkSome attention has been paid to make this software easily 39c609719bSwdenkconfigurable and extendable. For instance, all monitor commands are 40c609719bSwdenkimplemented with the same call interface, so that it's very easy to 41c609719bSwdenkadd new commands. Also, instead of permanently adding rarely used 42c609719bSwdenkcode (for instance hardware test utilities) to the monitor, you can 43c609719bSwdenkload and run it dynamically. 44c609719bSwdenk 45c609719bSwdenk 46c609719bSwdenkStatus: 47c609719bSwdenk======= 48c609719bSwdenk 49c609719bSwdenkIn general, all boards for which a configuration option exists in the 50c609719bSwdenkMakefile have been tested to some extent and can be considered 51c609719bSwdenk"working". In fact, many of them are used in production systems. 52c609719bSwdenk 53c609719bSwdenkIn case of problems see the CHANGELOG and CREDITS files to find out 54218ca724SWolfgang Denkwho contributed the specific port. The MAINTAINERS file lists board 55218ca724SWolfgang Denkmaintainers. 56c609719bSwdenk 57c609719bSwdenk 58c609719bSwdenkWhere to get help: 59c609719bSwdenk================== 60c609719bSwdenk 61c609719bSwdenkIn case you have questions about, problems with or contributions for 62c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 63c609719bSwdenk<u-boot-users@lists.sourceforge.net>. There is also an archive of 64c609719bSwdenkprevious traffic on the mailing list - please search the archive 65c609719bSwdenkbefore asking FAQ's. Please see 66c609719bSwdenkhttp://lists.sourceforge.net/lists/listinfo/u-boot-users/ 67c609719bSwdenk 68c609719bSwdenk 69218ca724SWolfgang DenkWhere to get source code: 70218ca724SWolfgang Denk========================= 71218ca724SWolfgang Denk 72218ca724SWolfgang DenkThe U-Boot source code is maintained in the git repository at 73218ca724SWolfgang Denkgit://www.denx.de/git/u-boot.git ; you can browse it online at 74218ca724SWolfgang Denkhttp://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary 75218ca724SWolfgang Denk 76218ca724SWolfgang DenkThe "snapshot" links on this page allow you to download tarballs of 77218ca724SWolfgang Denkany version you might be interested in. Ofifcial releases are also 78218ca724SWolfgang Denkavailable for FTP download from the ftp://ftp.denx.de/pub/u-boot/ 79218ca724SWolfgang Denkdirectory. 80218ca724SWolfgang Denk 81*d4ee711dSAnatolij GustschinPre-built (and tested) images are available from 82218ca724SWolfgang Denkftp://ftp.denx.de/pub/u-boot/images/ 83218ca724SWolfgang Denk 84218ca724SWolfgang Denk 85c609719bSwdenkWhere we come from: 86c609719bSwdenk=================== 87c609719bSwdenk 88c609719bSwdenk- start from 8xxrom sources 8924ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 90c609719bSwdenk- clean up code 91c609719bSwdenk- make it easier to add custom boards 92c609719bSwdenk- make it possible to add other [PowerPC] CPUs 93c609719bSwdenk- extend functions, especially: 94c609719bSwdenk * Provide extended interface to Linux boot loader 95c609719bSwdenk * S-Record download 96c609719bSwdenk * network boot 97c609719bSwdenk * PCMCIA / CompactFLash / ATA disk / SCSI ... boot 9824ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 99c609719bSwdenk- add other CPU families (starting with ARM) 10024ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 101218ca724SWolfgang Denk- current project page: see http://www.denx.de/wiki/UBoot 10224ee89b9Swdenk 10324ee89b9Swdenk 10424ee89b9SwdenkNames and Spelling: 10524ee89b9Swdenk=================== 10624ee89b9Swdenk 10724ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 10824ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 10924ee89b9Swdenkin source files etc.). Example: 11024ee89b9Swdenk 11124ee89b9Swdenk This is the README file for the U-Boot project. 11224ee89b9Swdenk 11324ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 11424ee89b9Swdenk 11524ee89b9Swdenk include/asm-ppc/u-boot.h 11624ee89b9Swdenk 11724ee89b9Swdenk #include <asm/u-boot.h> 11824ee89b9Swdenk 11924ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 12024ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 12124ee89b9Swdenk 12224ee89b9Swdenk U_BOOT_VERSION u_boot_logo 12324ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 124c609719bSwdenk 125c609719bSwdenk 12693f19cc0SwdenkVersioning: 12793f19cc0Swdenk=========== 12893f19cc0Swdenk 12993f19cc0SwdenkU-Boot uses a 3 level version number containing a version, a 13093f19cc0Swdenksub-version, and a patchlevel: "U-Boot-2.34.5" means version "2", 13193f19cc0Swdenksub-version "34", and patchlevel "4". 13293f19cc0Swdenk 13393f19cc0SwdenkThe patchlevel is used to indicate certain stages of development 13493f19cc0Swdenkbetween released versions, i. e. officially released versions of 13593f19cc0SwdenkU-Boot will always have a patchlevel of "0". 13693f19cc0Swdenk 13793f19cc0Swdenk 138c609719bSwdenkDirectory Hierarchy: 139c609719bSwdenk==================== 140c609719bSwdenk 1417152b1d0Swdenk- board Board dependent files 1427152b1d0Swdenk- common Misc architecture independent functions 143c609719bSwdenk- cpu CPU specific files 144983fda83Swdenk - 74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 14511dadd54Swdenk - arm720t Files specific to ARM 720 CPUs 14611dadd54Swdenk - arm920t Files specific to ARM 920 CPUs 147a85f9f21Swdenk - at91rm9200 Files specific to Atmel AT91RM9200 CPU 148983fda83Swdenk - imx Files specific to Freescale MC9328 i.MX CPUs 1491d9f4105Swdenk - s3c24x0 Files specific to Samsung S3C24X0 CPUs 15011dadd54Swdenk - arm925t Files specific to ARM 925 CPUs 15111dadd54Swdenk - arm926ejs Files specific to ARM 926 CPUs 1528ed96046Swdenk - arm1136 Files specific to ARM 1136 CPUs 15372a087e0SWolfgang Denk - at32ap Files specific to Atmel AVR32 AP CPUs 15411dadd54Swdenk - i386 Files specific to i386 CPUs 15511dadd54Swdenk - ixp Files specific to Intel XScale IXP CPUs 156983fda83Swdenk - mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1571552af70STsiChungLiew - mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs 1588e585f02STsiChung Liew - mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 1598ae158cdSTsiChungLiew - mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 16057a12720STsiChungLiew - mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs 16111dadd54Swdenk - mips Files specific to MIPS CPUs 162983fda83Swdenk - mpc5xx Files specific to Freescale MPC5xx CPUs 163983fda83Swdenk - mpc5xxx Files specific to Freescale MPC5xxx CPUs 164983fda83Swdenk - mpc8xx Files specific to Freescale MPC8xx CPUs 165983fda83Swdenk - mpc8220 Files specific to Freescale MPC8220 CPUs 166983fda83Swdenk - mpc824x Files specific to Freescale MPC824x CPUs 167983fda83Swdenk - mpc8260 Files specific to Freescale MPC8260 CPUs 168983fda83Swdenk - mpc85xx Files specific to Freescale MPC85xx CPUs 16911dadd54Swdenk - nios Files specific to Altera NIOS CPUs 1705c952cf0Swdenk - nios2 Files specific to Altera Nios-II CPUs 1710c8721a4SWolfgang Denk - ppc4xx Files specific to AMCC PowerPC 4xx CPUs 17211dadd54Swdenk - pxa Files specific to Intel XScale PXA CPUs 17311dadd54Swdenk - s3c44b0 Files specific to Samsung S3C44B0 CPUs 17411dadd54Swdenk - sa1100 Files specific to Intel StrongARM SA1100 CPUs 175c609719bSwdenk- disk Code for disk drive partition handling 176c609719bSwdenk- doc Documentation (don't expect too much) 1777152b1d0Swdenk- drivers Commonly used device drivers 178c609719bSwdenk- dtt Digital Thermometer and Thermostat drivers 179c609719bSwdenk- examples Example code for standalone applications, etc. 180c609719bSwdenk- include Header Files 18111dadd54Swdenk- lib_arm Files generic to ARM architecture 1827b64fef3SWolfgang Denk- lib_avr32 Files generic to AVR32 architecture 18311dadd54Swdenk- lib_generic Files generic to all architectures 18411dadd54Swdenk- lib_i386 Files generic to i386 architecture 18511dadd54Swdenk- lib_m68k Files generic to m68k architecture 18611dadd54Swdenk- lib_mips Files generic to MIPS architecture 18711dadd54Swdenk- lib_nios Files generic to NIOS architecture 18811dadd54Swdenk- lib_ppc Files generic to PowerPC architecture 189213bf8c8SGerald Van Baren- libfdt Library files to support flattened device trees 190c609719bSwdenk- net Networking code 191c609719bSwdenk- post Power On Self Test 192c609719bSwdenk- rtc Real Time Clock drivers 193c609719bSwdenk- tools Tools to build S-Record or U-Boot images, etc. 194c609719bSwdenk 195c609719bSwdenkSoftware Configuration: 196c609719bSwdenk======================= 197c609719bSwdenk 198c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 199c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 200c609719bSwdenk 201c609719bSwdenkThere are two classes of configuration variables: 202c609719bSwdenk 203c609719bSwdenk* Configuration _OPTIONS_: 204c609719bSwdenk These are selectable by the user and have names beginning with 205c609719bSwdenk "CONFIG_". 206c609719bSwdenk 207c609719bSwdenk* Configuration _SETTINGS_: 208c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 209c609719bSwdenk you don't know what you're doing; they have names beginning with 210c609719bSwdenk "CFG_". 211c609719bSwdenk 212c609719bSwdenkLater we will add a configuration tool - probably similar to or even 213c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 214c609719bSwdenkdo the configuration by hand, which means creating some symbolic 215c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 216c609719bSwdenkas an example here. 217c609719bSwdenk 218c609719bSwdenk 219c609719bSwdenkSelection of Processor Architecture and Board Type: 220c609719bSwdenk--------------------------------------------------- 221c609719bSwdenk 222c609719bSwdenkFor all supported boards there are ready-to-use default 223c609719bSwdenkconfigurations available; just type "make <board_name>_config". 224c609719bSwdenk 225c609719bSwdenkExample: For a TQM823L module type: 226c609719bSwdenk 227c609719bSwdenk cd u-boot 228c609719bSwdenk make TQM823L_config 229c609719bSwdenk 230c609719bSwdenkFor the Cogent platform, you need to specify the cpu type as well; 231c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 232c609719bSwdenkdirectory according to the instructions in cogent/README. 233c609719bSwdenk 234c609719bSwdenk 235c609719bSwdenkConfiguration Options: 236c609719bSwdenk---------------------- 237c609719bSwdenk 238c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 239c609719bSwdenksuch information is kept in a configuration file 240c609719bSwdenk"include/configs/<board_name>.h". 241c609719bSwdenk 242c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 243c609719bSwdenk"include/configs/TQM823L.h". 244c609719bSwdenk 245c609719bSwdenk 2467f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2477f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2487f6c2cbcSwdenkbuild a config tool - later. 2497f6c2cbcSwdenk 2507f6c2cbcSwdenk 251c609719bSwdenkThe following options need to be configured: 252c609719bSwdenk 2532628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 254c609719bSwdenk 2552628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2566ccec449SWolfgang Denk 2576ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 25809ea0de0SHaavard Skinnemoen Define exactly one, e.g. CONFIG_ATSTK1002 259c609719bSwdenk 260c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 261c609719bSwdenk Define exactly one of 262c609719bSwdenk CONFIG_CMA286_60_OLD 263c609719bSwdenk--- FIXME --- not tested yet: 264c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 265c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 266c609719bSwdenk 267c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 268c609719bSwdenk Define exactly one of 269c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 270c609719bSwdenk 271c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 272c609719bSwdenk Define one or more of 273c609719bSwdenk CONFIG_CMA302 274c609719bSwdenk 275c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 276c609719bSwdenk Define one or more of 277c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 278c609719bSwdenk the lcd display every second with 279c609719bSwdenk a "rotator" |\-/|\-/ 280c609719bSwdenk 2812535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 2822535d602Swdenk CONFIG_ADSTYPE 2832535d602Swdenk Possible values are: 2842535d602Swdenk CFG_8260ADS - original MPC8260ADS 285180d3f74Swdenk CFG_8266ADS - MPC8266ADS 28654387ac9Swdenk CFG_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 28704a85b3bSwdenk CFG_8272ADS - MPC8272ADS 2882535d602Swdenk 289c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 290c609719bSwdenk Define exactly one of 291c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 292c609719bSwdenk 29375d1ea7fSwdenk- 8xx CPU Options: (if using an MPC8xx cpu) 29466ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 29566ca92a5Swdenk get_gclk_freq() cannot work 2965da627a4Swdenk e.g. if there is no 32KHz 2975da627a4Swdenk reference PIT/RTC clock 29866ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 29966ca92a5Swdenk or XTAL/EXTAL) 300c609719bSwdenk 30166ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 30266ca92a5Swdenk CFG_8xx_CPUCLK_MIN 30366ca92a5Swdenk CFG_8xx_CPUCLK_MAX 30466ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 30575d1ea7fSwdenk See doc/README.MPC866 30675d1ea7fSwdenk 30775d1ea7fSwdenk CFG_MEASURE_CPUCLK 30875d1ea7fSwdenk 30975d1ea7fSwdenk Define this to measure the actual CPU clock instead 31075d1ea7fSwdenk of relying on the correctness of the configured 31175d1ea7fSwdenk values. Mostly useful for board bringup to make sure 31275d1ea7fSwdenk the PLL is locked at the intended frequency. Note 31375d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 31466ca92a5Swdenk RTC clock or CFG_8XX_XIN) 31575d1ea7fSwdenk 3160b953ffcSMarkus Klotzbuecher- Intel Monahans options: 3170b953ffcSMarkus Klotzbuecher CFG_MONAHANS_RUN_MODE_OSC_RATIO 3180b953ffcSMarkus Klotzbuecher 3190b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 3200b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 3210b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 3220b953ffcSMarkus Klotzbuecher 3230b953ffcSMarkus Klotzbuecher CFG_MONAHANS_TURBO_RUN_MODE_RATIO 3240b953ffcSMarkus Klotzbuecher 3250b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 3260b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 3270b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 3280b953ffcSMarkus Klotzbuecher by this value. 3290b953ffcSMarkus Klotzbuecher 3305da627a4Swdenk- Linux Kernel Interface: 331c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 332c609719bSwdenk 333c609719bSwdenk U-Boot stores all clock information in Hz 334c609719bSwdenk internally. For binary compatibility with older Linux 335c609719bSwdenk kernels (which expect the clocks passed in the 336c609719bSwdenk bd_info data to be in MHz) the environment variable 337c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 338c609719bSwdenk converts clock data to MHZ before passing it to the 339c609719bSwdenk Linux kernel. 340c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 341c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 342c609719bSwdenk default environment. 343c609719bSwdenk 3445da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 3455da627a4Swdenk 3465da627a4Swdenk When transfering memsize parameter to linux, some versions 3475da627a4Swdenk expect it to be in bytes, others in MB. 3485da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 3495da627a4Swdenk 350213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT / CONFIG_OF_FLAT_TREE 351f57f70aaSWolfgang Denk 352f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 353213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 354213bf8c8SGerald Van Baren concepts). 355213bf8c8SGerald Van Baren 356213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 357213bf8c8SGerald Van Baren * New libfdt-based support 358213bf8c8SGerald Van Baren * Adds the "fdt" command 3593bb342fcSKim Phillips * The bootm command automatically updates the fdt 360213bf8c8SGerald Van Baren 361213bf8c8SGerald Van Baren CONFIG_OF_FLAT_TREE 362213bf8c8SGerald Van Baren * Deprecated, see CONFIG_OF_LIBFDT 363213bf8c8SGerald Van Baren * Original ft_build.c-based support 364213bf8c8SGerald Van Baren * Automatically modifies the dft as part of the bootm command 365213bf8c8SGerald Van Baren * The environment variable "disable_of", when set, 366213bf8c8SGerald Van Baren disables this functionality. 367f57f70aaSWolfgang Denk 368f57f70aaSWolfgang Denk OF_CPU - The proper name of the cpus node. 369c2871f03SKumar Gala OF_SOC - The proper name of the soc node. 370f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 371c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 372f57f70aaSWolfgang Denk 3733bb342fcSKim Phillips boards with QUICC Engines require OF_QE to set UCC mac addresses 3743bb342fcSKim Phillips 375e4f880edSKumar Gala CONFIG_OF_HAS_BD_T 376e4f880edSKumar Gala 377213bf8c8SGerald Van Baren * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command 378213bf8c8SGerald Van Baren * CONFIG_OF_FLAT_TREE - The resulting flat device tree 379213bf8c8SGerald Van Baren will have a copy of the bd_t. Space should be 380213bf8c8SGerald Van Baren pre-allocated in the dts for the bd_t. 381e4f880edSKumar Gala 382e4f880edSKumar Gala CONFIG_OF_HAS_UBOOT_ENV 383e4f880edSKumar Gala 3843bb342fcSKim Phillips * CONFIG_OF_LIBFDT - enables the "fdt env" command 385213bf8c8SGerald Van Baren * CONFIG_OF_FLAT_TREE - The resulting flat device tree 386213bf8c8SGerald Van Baren will have a copy of u-boot's environment variables 387e4f880edSKumar Gala 3884e253137SKumar Gala CONFIG_OF_BOARD_SETUP 3894e253137SKumar Gala 3904e253137SKumar Gala Board code has addition modification that it wants to make 3914e253137SKumar Gala to the flat device tree before handing it off to the kernel 3926705d81eSwdenk 3930267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 3940267768eSMatthew McClintock 3950267768eSMatthew McClintock This define fills in the correct boot cpu in the boot 3960267768eSMatthew McClintock param header, the default value is zero if undefined. 3970267768eSMatthew McClintock 3986705d81eSwdenk- Serial Ports: 3996705d81eSwdenk CFG_PL010_SERIAL 4006705d81eSwdenk 4016705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 4026705d81eSwdenk 4036705d81eSwdenk CFG_PL011_SERIAL 4046705d81eSwdenk 4056705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 4066705d81eSwdenk 4076705d81eSwdenk CONFIG_PL011_CLOCK 4086705d81eSwdenk 4096705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 4106705d81eSwdenk the clock speed of the UARTs. 4116705d81eSwdenk 4126705d81eSwdenk CONFIG_PL01x_PORTS 4136705d81eSwdenk 4146705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 4156705d81eSwdenk define this to a list of base addresses for each (supported) 4166705d81eSwdenk port. See e.g. include/configs/versatile.h 4176705d81eSwdenk 4186705d81eSwdenk 419c609719bSwdenk- Console Interface: 420c609719bSwdenk Depending on board, define exactly one serial port 421c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 422c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 423c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 424c609719bSwdenk 425c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 426c609719bSwdenk port routines must be defined elsewhere 427c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 428c609719bSwdenk 429c609719bSwdenk CONFIG_CFB_CONSOLE 430c609719bSwdenk Enables console device for a color framebuffer. Needs following 431c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 432c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 433c609719bSwdenk (default big endian) 434c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 435c609719bSwdenk rectangle fill 436c609719bSwdenk (cf. smiLynxEM) 437c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 438c609719bSwdenk bit-blit (cf. smiLynxEM) 439c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 440c609719bSwdenk (cols=pitch) 441c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 442c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 443c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 444c609719bSwdenk (0-5, cf. cfb_console.c) 445c609719bSwdenk VIDEO_FB_ADRS framebuffer address 446c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 447c609719bSwdenk (i.e. i8042_kbd_init()) 448c609719bSwdenk VIDEO_TSTC_FCT test char fct 449c609719bSwdenk (i.e. i8042_tstc) 450c609719bSwdenk VIDEO_GETC_FCT get char fct 451c609719bSwdenk (i.e. i8042_getc) 452c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 453c609719bSwdenk (requires blink timer 454c609719bSwdenk cf. i8042.c) 455c609719bSwdenk CFG_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 456c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 457c609719bSwdenk upper right corner 458602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 459c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 460c609719bSwdenk upper left corner 461a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 462a6c7ad2fSwdenk linux_logo.h for logo. 463a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 464c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 465c609719bSwdenk addional board info beside 466c609719bSwdenk the logo 467c609719bSwdenk 468c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 469c609719bSwdenk default i/o. Serial console can be forced with 470c609719bSwdenk environment 'console=serial'. 471c609719bSwdenk 472a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 473a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 474a3ad8e26Swdenk the "silent" environment variable. See 475a3ad8e26Swdenk doc/README.silent for more information. 476a3ad8e26Swdenk 477c609719bSwdenk- Console Baudrate: 478c609719bSwdenk CONFIG_BAUDRATE - in bps 479c609719bSwdenk Select one of the baudrates listed in 480c609719bSwdenk CFG_BAUDRATE_TABLE, see below. 4813bbc899fSwdenk CFG_BRGCLK_PRESCALE, baudrate prescale 482c609719bSwdenk 483c609719bSwdenk- Interrupt driven serial port input: 484c609719bSwdenk CONFIG_SERIAL_SOFTWARE_FIFO 485c609719bSwdenk 486c609719bSwdenk PPC405GP only. 487c609719bSwdenk Use an interrupt handler for receiving data on the 488c609719bSwdenk serial port. It also enables using hardware handshake 489c609719bSwdenk (RTS/CTS) and UART's built-in FIFO. Set the number of 490c609719bSwdenk bytes the interrupt driven input buffer should have. 491c609719bSwdenk 492109c0e3aSwdenk Leave undefined to disable this feature, including 493109c0e3aSwdenk disable the buffer and hardware handshake. 494c609719bSwdenk 4951d49b1f3Sstroese- Console UART Number: 4961d49b1f3Sstroese CONFIG_UART1_CONSOLE 4971d49b1f3Sstroese 4980c8721a4SWolfgang Denk AMCC PPC4xx only. 4991d49b1f3Sstroese If defined internal UART1 (and not UART0) is used 5001d49b1f3Sstroese as default U-Boot console. 5011d49b1f3Sstroese 502c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 503c609719bSwdenk Delay before automatically booting the default image; 504c609719bSwdenk set to -1 to disable autoboot. 505c609719bSwdenk 506c609719bSwdenk See doc/README.autoboot for these options that 507c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 508c609719bSwdenk CONFIG_BOOT_RETRY_TIME 509c609719bSwdenk CONFIG_BOOT_RETRY_MIN 510c609719bSwdenk CONFIG_AUTOBOOT_KEYED 511c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 512c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 513c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 514c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 515c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 516c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 517c609719bSwdenk CONFIG_RESET_TO_RETRY 518c609719bSwdenk 519c609719bSwdenk- Autoboot Command: 520c609719bSwdenk CONFIG_BOOTCOMMAND 521c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 522c609719bSwdenk define a command string that is automatically executed 523c609719bSwdenk when no character is read on the console interface 524c609719bSwdenk within "Boot Delay" after reset. 525c609719bSwdenk 526c609719bSwdenk CONFIG_BOOTARGS 527c609719bSwdenk This can be used to pass arguments to the bootm 528c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 529c609719bSwdenk environment value "bootargs". 530c609719bSwdenk 531c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 532c609719bSwdenk The value of these goes into the environment as 533c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 534c609719bSwdenk as a convenience, when switching between booting from 535c609719bSwdenk ram and nfs. 536c609719bSwdenk 537c609719bSwdenk- Pre-Boot Commands: 538c609719bSwdenk CONFIG_PREBOOT 539c609719bSwdenk 540c609719bSwdenk When this option is #defined, the existence of the 541c609719bSwdenk environment variable "preboot" will be checked 542c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 543c609719bSwdenk countdown and/or running the auto-boot command resp. 544c609719bSwdenk entering interactive mode. 545c609719bSwdenk 546c609719bSwdenk This feature is especially useful when "preboot" is 547c609719bSwdenk automatically generated or modified. For an example 548c609719bSwdenk see the LWMON board specific code: here "preboot" is 549c609719bSwdenk modified when the user holds down a certain 550c609719bSwdenk combination of keys on the (special) keyboard when 551c609719bSwdenk booting the systems 552c609719bSwdenk 553c609719bSwdenk- Serial Download Echo Mode: 554c609719bSwdenk CONFIG_LOADS_ECHO 555c609719bSwdenk If defined to 1, all characters received during a 556c609719bSwdenk serial download (using the "loads" command) are 557c609719bSwdenk echoed back. This might be needed by some terminal 558c609719bSwdenk emulations (like "cu"), but may as well just take 559c609719bSwdenk time on others. This setting #define's the initial 560c609719bSwdenk value of the "loads_echo" environment variable. 561c609719bSwdenk 562602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 563c609719bSwdenk CONFIG_KGDB_BAUDRATE 564c609719bSwdenk Select one of the baudrates listed in 565c609719bSwdenk CFG_BAUDRATE_TABLE, see below. 566c609719bSwdenk 567c609719bSwdenk- Monitor Functions: 568602ad3b3SJon Loeliger Monitor commands can be included or excluded 569602ad3b3SJon Loeliger from the build by using the #include files 570602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 571602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 572602ad3b3SJon Loeliger and augmenting with additional #define's 573602ad3b3SJon Loeliger for wanted commands. 574c609719bSwdenk 575602ad3b3SJon Loeliger The default command configuration includes all commands 576602ad3b3SJon Loeliger except those marked below with a "*". 577602ad3b3SJon Loeliger 578602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 579602ad3b3SJon Loeliger CONFIG_CMD_AUTOSCRIPT Autoscript Support 580602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 581602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 582602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 583602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 584602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 585602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 586602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 587602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 588602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 589602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 590602ad3b3SJon Loeliger CONFIG_CMD_DOC * Disk-On-Chip Support 591602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 592602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 593602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 594602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 595602ad3b3SJon Loeliger CONFIG_CMD_ENV saveenv 596602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 597602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 598602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 599602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 600602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 601602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 602602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 603602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 604602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 605602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 606602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 607602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 608602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 609602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 610602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 611602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 612602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 613602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 61456523f12Swdenk loop, loopw, mtest 615602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 616602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 617602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 618602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 619602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 620602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 621602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 622602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 623602ad3b3SJon Loeliger host 624602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 625602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 626602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 627602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 628602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 629602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 630602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 631602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 632602ad3b3SJon Loeliger (4xx only) 633602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 634602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 635602ad3b3SJon Loeliger CONFIG_CMD_VFD * VFD support (TRAB) 636602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board SPecific functions 637602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 638602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 639c609719bSwdenk 640c609719bSwdenk 641c609719bSwdenk EXAMPLE: If you want all functions except of network 642c609719bSwdenk support you can write: 643c609719bSwdenk 644602ad3b3SJon Loeliger #include "config_cmd_all.h" 645602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 646c609719bSwdenk 647213bf8c8SGerald Van Baren Other Commands: 648213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 649c609719bSwdenk 650c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 651602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 652c609719bSwdenk what you (and your U-Boot users) are doing. Data 653c609719bSwdenk cache cannot be enabled on systems like the 8xx or 654c609719bSwdenk 8260 (where accesses to the IMMR region must be 655c609719bSwdenk uncached), and it cannot be disabled on all other 656c609719bSwdenk systems where we (mis-) use the data cache to hold an 657c609719bSwdenk initial stack and some data. 658c609719bSwdenk 659c609719bSwdenk 660c609719bSwdenk XXX - this list needs to get updated! 661c609719bSwdenk 662c609719bSwdenk- Watchdog: 663c609719bSwdenk CONFIG_WATCHDOG 664c609719bSwdenk If this variable is defined, it enables watchdog 6657152b1d0Swdenk support. There must be support in the platform specific 666c609719bSwdenk code for a watchdog. For the 8xx and 8260 CPUs, the 667c609719bSwdenk SIU Watchdog feature is enabled in the SYPCR 668c609719bSwdenk register. 669c609719bSwdenk 670c1551ea8Sstroese- U-Boot Version: 671c1551ea8Sstroese CONFIG_VERSION_VARIABLE 672c1551ea8Sstroese If this variable is defined, an environment variable 673c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 674c1551ea8Sstroese version as printed by the "version" command. 675c1551ea8Sstroese This variable is readonly. 676c1551ea8Sstroese 677c609719bSwdenk- Real-Time Clock: 678c609719bSwdenk 679602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 680c609719bSwdenk has to be selected, too. Define exactly one of the 681c609719bSwdenk following options: 682c609719bSwdenk 683c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 684c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 685c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 6861cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 687c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 6887f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 6893bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 6909536dfccSTor Krill CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC 6914c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 692da8808dfSJoakim Tjernlund CFG_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 693c609719bSwdenk 694b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 695b37c7e5eSwdenk must also be configured. See I2C Support, below. 696b37c7e5eSwdenk 697c609719bSwdenk- Timestamp Support: 698c609719bSwdenk 699c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 700c609719bSwdenk (date and time) of an image is printed by image 701c609719bSwdenk commands like bootm or iminfo. This option is 702602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 703c609719bSwdenk 704c609719bSwdenk- Partition Support: 705c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 706c609719bSwdenk and/or CONFIG_ISO_PARTITION 707c609719bSwdenk 708602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 709218ca724SWolfgang Denk CONFIG_CMD_SCSI) you must configure support for at 710218ca724SWolfgang Denk least one partition type as well. 711c609719bSwdenk 712c609719bSwdenk- IDE Reset method: 7134d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 7144d13cbadSwdenk board configurations files but used nowhere! 715c609719bSwdenk 7164d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 7174d13cbadSwdenk be performed by calling the function 7184d13cbadSwdenk ide_set_reset(int reset) 7194d13cbadSwdenk which has to be defined in a board specific file 720c609719bSwdenk 721c609719bSwdenk- ATAPI Support: 722c609719bSwdenk CONFIG_ATAPI 723c609719bSwdenk 724c609719bSwdenk Set this to enable ATAPI support. 725c609719bSwdenk 726c40b2956Swdenk- LBA48 Support 727c40b2956Swdenk CONFIG_LBA48 728c40b2956Swdenk 729c40b2956Swdenk Set this to enable support for disks larger than 137GB 730c40b2956Swdenk Also look at CFG_64BIT_LBA ,CFG_64BIT_VSPRINTF and CFG_64BIT_STRTOUL 731c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 732c40b2956Swdenk support disks up to 2.1TB. 733c40b2956Swdenk 734c40b2956Swdenk CFG_64BIT_LBA: 735c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 736c40b2956Swdenk Default is 32bit. 737c40b2956Swdenk 738c609719bSwdenk- SCSI Support: 739c609719bSwdenk At the moment only there is only support for the 740c609719bSwdenk SYM53C8XX SCSI controller; define 741c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 742c609719bSwdenk 743c609719bSwdenk CFG_SCSI_MAX_LUN [8], CFG_SCSI_MAX_SCSI_ID [7] and 744c609719bSwdenk CFG_SCSI_MAX_DEVICE [CFG_SCSI_MAX_SCSI_ID * 745c609719bSwdenk CFG_SCSI_MAX_LUN] can be adjusted to define the 746c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 747c609719bSwdenk devices. 748c609719bSwdenk CFG_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 749c609719bSwdenk 750c609719bSwdenk- NETWORK Support (PCI): 751682011ffSwdenk CONFIG_E1000 752682011ffSwdenk Support for Intel 8254x gigabit chips. 753682011ffSwdenk 754c609719bSwdenk CONFIG_EEPRO100 755c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 756c609719bSwdenk Optional CONFIG_EEPRO100_SROM_WRITE enables eeprom 757c609719bSwdenk write routine for first time initialisation. 758c609719bSwdenk 759c609719bSwdenk CONFIG_TULIP 760c609719bSwdenk Support for Digital 2114x chips. 761c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 762c609719bSwdenk modem chip initialisation (KS8761/QS6611). 763c609719bSwdenk 764c609719bSwdenk CONFIG_NATSEMI 765c609719bSwdenk Support for National dp83815 chips. 766c609719bSwdenk 767c609719bSwdenk CONFIG_NS8382X 768c609719bSwdenk Support for National dp8382[01] gigabit chips. 769c609719bSwdenk 77045219c46Swdenk- NETWORK Support (other): 77145219c46Swdenk 77245219c46Swdenk CONFIG_DRIVER_LAN91C96 77345219c46Swdenk Support for SMSC's LAN91C96 chips. 77445219c46Swdenk 77545219c46Swdenk CONFIG_LAN91C96_BASE 77645219c46Swdenk Define this to hold the physical address 77745219c46Swdenk of the LAN91C96's I/O space 77845219c46Swdenk 77945219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 78045219c46Swdenk Define this to enable 32 bit addressing 78145219c46Swdenk 782f39748aeSwdenk CONFIG_DRIVER_SMC91111 783f39748aeSwdenk Support for SMSC's LAN91C111 chip 784f39748aeSwdenk 785f39748aeSwdenk CONFIG_SMC91111_BASE 786f39748aeSwdenk Define this to hold the physical address 787f39748aeSwdenk of the device (I/O space) 788f39748aeSwdenk 789f39748aeSwdenk CONFIG_SMC_USE_32_BIT 790f39748aeSwdenk Define this if data bus is 32 bits 791f39748aeSwdenk 792f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 793f39748aeSwdenk Define this to use i/o functions instead of macros 794f39748aeSwdenk (some hardware wont work with macros) 795f39748aeSwdenk 796c609719bSwdenk- USB Support: 797c609719bSwdenk At the moment only the UHCI host controller is 7984d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 799c609719bSwdenk CONFIG_USB_UHCI to enable it. 800c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 80130d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 802c609719bSwdenk storage devices. 803c609719bSwdenk Note: 804c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 805c609719bSwdenk (TEAC FD-05PUB). 8064d13cbadSwdenk MPC5200 USB requires additional defines: 8074d13cbadSwdenk CONFIG_USB_CLOCK 8084d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 8094d13cbadSwdenk CONFIG_USB_CONFIG 8104d13cbadSwdenk for differential drivers: 0x00001000 8114d13cbadSwdenk for single ended drivers: 0x00005000 812fdcfaa1bSZhang Wei CFG_USB_EVENT_POLL 813fdcfaa1bSZhang Wei May be defined to allow interrupt polling 814fdcfaa1bSZhang Wei instead of using asynchronous interrupts 8154d13cbadSwdenk 81616c8d5e7SWolfgang Denk- USB Device: 81716c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 81816c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 81916c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 82016c8d5e7SWolfgang Denk attach your usb cable. The Unix command "dmesg" should print 82116c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 82216c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 82316c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 82416c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 82516c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 82616c8d5e7SWolfgang Denk a Linux host by 82716c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 82816c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 82916c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 83016c8d5e7SWolfgang Denk might be defined in YourBoardName.h 83116c8d5e7SWolfgang Denk 83216c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 83316c8d5e7SWolfgang Denk Define this to build a UDC device 83416c8d5e7SWolfgang Denk 83516c8d5e7SWolfgang Denk CONFIG_USB_TTY 83616c8d5e7SWolfgang Denk Define this to have a tty type of device available to 83716c8d5e7SWolfgang Denk talk to the UDC device 83816c8d5e7SWolfgang Denk 83916c8d5e7SWolfgang Denk CFG_CONSOLE_IS_IN_ENV 84016c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 84116c8d5e7SWolfgang Denk be set to usbtty. 84216c8d5e7SWolfgang Denk 84316c8d5e7SWolfgang Denk mpc8xx: 84416c8d5e7SWolfgang Denk CFG_USB_EXTC_CLK 0xBLAH 84516c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 84616c8d5e7SWolfgang Denk - CFG_USB_EXTC_CLK 0x02 84716c8d5e7SWolfgang Denk 84816c8d5e7SWolfgang Denk CFG_USB_BRG_CLK 0xBLAH 84916c8d5e7SWolfgang Denk Derive USB clock from brgclk 85016c8d5e7SWolfgang Denk - CFG_USB_BRG_CLK 0x04 85116c8d5e7SWolfgang Denk 85216c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 85316c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 85416c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 85516c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 85616c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 85716c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 85816c8d5e7SWolfgang Denk 85916c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 86016c8d5e7SWolfgang Denk Define this string as the name of your company for 86116c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 86216c8d5e7SWolfgang Denk 86316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 86416c8d5e7SWolfgang Denk Define this string as the name of your product 86516c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 86616c8d5e7SWolfgang Denk 86716c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 86816c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 86916c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 87016c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 87116c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 87216c8d5e7SWolfgang Denk 87316c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 87416c8d5e7SWolfgang Denk Define this as the unique Product ID 87516c8d5e7SWolfgang Denk for your device 87616c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 877c609719bSwdenk 878c609719bSwdenk 879c609719bSwdenk- MMC Support: 880c609719bSwdenk The MMC controller on the Intel PXA is supported. To 881c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 882c609719bSwdenk accessed from the boot prompt by mapping the device 883c609719bSwdenk to physical memory similar to flash. Command line is 884602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 885602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 886c609719bSwdenk 8876705d81eSwdenk- Journaling Flash filesystem support: 8886705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 8896705d81eSwdenk CONFIG_JFFS2_NAND_DEV 8906705d81eSwdenk Define these for a default partition on a NAND device 8916705d81eSwdenk 8926705d81eSwdenk CFG_JFFS2_FIRST_SECTOR, 8936705d81eSwdenk CFG_JFFS2_FIRST_BANK, CFG_JFFS2_NUM_BANKS 8946705d81eSwdenk Define these for a default partition on a NOR device 8956705d81eSwdenk 8966705d81eSwdenk CFG_JFFS_CUSTOM_PART 8976705d81eSwdenk Define this to create an own partition. You have to provide a 8986705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 8996705d81eSwdenk 9006705d81eSwdenk If you define only one JFFS2 partition you may also want to 9016705d81eSwdenk #define CFG_JFFS_SINGLE_PART 1 9026705d81eSwdenk to disable the command chpart. This is the default when you 9036705d81eSwdenk have not defined a custom partition 9046705d81eSwdenk 905c609719bSwdenk- Keyboard Support: 906c609719bSwdenk CONFIG_ISA_KEYBOARD 907c609719bSwdenk 908c609719bSwdenk Define this to enable standard (PC-Style) keyboard 909c609719bSwdenk support 910c609719bSwdenk 911c609719bSwdenk CONFIG_I8042_KBD 912c609719bSwdenk Standard PC keyboard driver with US (is default) and 913c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 914c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 915c609719bSwdenk for cfb_console. Supports cursor blinking. 916c609719bSwdenk 917c609719bSwdenk- Video support: 918c609719bSwdenk CONFIG_VIDEO 919c609719bSwdenk 920c609719bSwdenk Define this to enable video support (for output to 921c609719bSwdenk video). 922c609719bSwdenk 923c609719bSwdenk CONFIG_VIDEO_CT69000 924c609719bSwdenk 925c609719bSwdenk Enable Chips & Technologies 69000 Video chip 926c609719bSwdenk 927c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 928eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 929eeb1b77bSwdenk video output is selected via environment 'videoout' 930eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 931eeb1b77bSwdenk assumed. 932c609719bSwdenk 933eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 934eeb1b77bSwdenk selected via environment 'videomode'. Two diferent ways 935eeb1b77bSwdenk are possible: 936eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 937eeb1b77bSwdenk Following standard modes are supported (* is default): 938eeb1b77bSwdenk 939eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 940eeb1b77bSwdenk -------------+--------------------------------------------- 941eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 942eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 943eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 944eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 945eeb1b77bSwdenk -------------+--------------------------------------------- 946c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 947c609719bSwdenk 948eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 9497817cb20SMarcel Ziswiler from the bootargs. (See drivers/video/videomodes.c) 950eeb1b77bSwdenk 951eeb1b77bSwdenk 952a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 953a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 954a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 955a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 956a6c7ad2fSwdenk 957682011ffSwdenk- Keyboard Support: 958682011ffSwdenk CONFIG_KEYBOARD 959682011ffSwdenk 960682011ffSwdenk Define this to enable a custom keyboard support. 961682011ffSwdenk This simply calls drv_keyboard_init() which must be 962682011ffSwdenk defined in your board-specific files. 963682011ffSwdenk The only board using this so far is RBC823. 964a6c7ad2fSwdenk 965c609719bSwdenk- LCD Support: CONFIG_LCD 966c609719bSwdenk 967c609719bSwdenk Define this to enable LCD support (for output to LCD 968c609719bSwdenk display); also select one of the supported displays 969c609719bSwdenk by defining one of these: 970c609719bSwdenk 971fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 972c609719bSwdenk 973fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 974c609719bSwdenk 975fd3103bbSwdenk CONFIG_NEC_NL6448BC20 976c609719bSwdenk 977fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 978fd3103bbSwdenk Active, color, single scan. 979fd3103bbSwdenk 980fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 981fd3103bbSwdenk 982fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 983c609719bSwdenk Active, color, single scan. 984c609719bSwdenk 985c609719bSwdenk CONFIG_SHARP_16x9 986c609719bSwdenk 987c609719bSwdenk Sharp 320x240. Active, color, single scan. 988c609719bSwdenk It isn't 16x9, and I am not sure what it is. 989c609719bSwdenk 990c609719bSwdenk CONFIG_SHARP_LQ64D341 991c609719bSwdenk 992c609719bSwdenk Sharp LQ64D341 display, 640x480. 993c609719bSwdenk Active, color, single scan. 994c609719bSwdenk 995c609719bSwdenk CONFIG_HLD1045 996c609719bSwdenk 997c609719bSwdenk HLD1045 display, 640x480. 998c609719bSwdenk Active, color, single scan. 999c609719bSwdenk 1000c609719bSwdenk CONFIG_OPTREX_BW 1001c609719bSwdenk 1002c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 1003c609719bSwdenk or 1004c609719bSwdenk Hitachi LMG6912RPFC-00T 1005c609719bSwdenk or 1006c609719bSwdenk Hitachi SP14Q002 1007c609719bSwdenk 1008c609719bSwdenk 320x240. Black & white. 1009c609719bSwdenk 1010c609719bSwdenk Normally display is black on white background; define 1011c609719bSwdenk CFG_WHITE_ON_BLACK to get it inverted. 1012c609719bSwdenk 10137152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 1014d791b1dcSwdenk 1015d791b1dcSwdenk If this option is set, the environment is checked for 1016d791b1dcSwdenk a variable "splashimage". If found, the usual display 1017d791b1dcSwdenk of logo, copyright and system information on the LCD 1018e94d2cd9Swdenk is suppressed and the BMP image at the address 1019d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1020d791b1dcSwdenk console is redirected to the "nulldev", too. This 1021d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1022d791b1dcSwdenk loaded very quickly after power-on. 1023d791b1dcSwdenk 102498f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 102598f4a3dfSStefan Roese 102698f4a3dfSStefan Roese If this option is set, additionally to standard BMP 102798f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 102898f4a3dfSStefan Roese splashscreen support or the bmp command. 102998f4a3dfSStefan Roese 1030c29fdfc1Swdenk- Compression support: 1031c29fdfc1Swdenk CONFIG_BZIP2 1032c29fdfc1Swdenk 1033c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1034c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1035c29fdfc1Swdenk compressed images are supported. 1036c29fdfc1Swdenk 1037c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1038c29fdfc1Swdenk the malloc area (as defined by CFG_MALLOC_LEN) should 1039c29fdfc1Swdenk be at least 4MB. 1040d791b1dcSwdenk 104117ea1177Swdenk- MII/PHY support: 104217ea1177Swdenk CONFIG_PHY_ADDR 104317ea1177Swdenk 104417ea1177Swdenk The address of PHY on MII bus. 104517ea1177Swdenk 104617ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 104717ea1177Swdenk 104817ea1177Swdenk The clock frequency of the MII bus 104917ea1177Swdenk 105017ea1177Swdenk CONFIG_PHY_GIGE 105117ea1177Swdenk 105217ea1177Swdenk If this option is set, support for speed/duplex 105317ea1177Swdenk detection of Gigabit PHY is included. 105417ea1177Swdenk 105517ea1177Swdenk CONFIG_PHY_RESET_DELAY 105617ea1177Swdenk 105717ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 105817ea1177Swdenk reset before any MII register access is possible. 105917ea1177Swdenk For such PHY, set this option to the usec delay 106017ea1177Swdenk required. (minimum 300usec for LXT971A) 106117ea1177Swdenk 106217ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 106317ea1177Swdenk 106417ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 106517ea1177Swdenk command issued before MII status register can be read 106617ea1177Swdenk 1067c609719bSwdenk- Ethernet address: 1068c609719bSwdenk CONFIG_ETHADDR 1069c609719bSwdenk CONFIG_ETH2ADDR 1070c609719bSwdenk CONFIG_ETH3ADDR 1071c609719bSwdenk 1072c609719bSwdenk Define a default value for ethernet address to use 1073c609719bSwdenk for the respective ethernet interface, in case this 1074c609719bSwdenk is not determined automatically. 1075c609719bSwdenk 1076c609719bSwdenk- IP address: 1077c609719bSwdenk CONFIG_IPADDR 1078c609719bSwdenk 1079c609719bSwdenk Define a default value for the IP address to use for 1080c609719bSwdenk the default ethernet interface, in case this is not 1081c609719bSwdenk determined through e.g. bootp. 1082c609719bSwdenk 1083c609719bSwdenk- Server IP address: 1084c609719bSwdenk CONFIG_SERVERIP 1085c609719bSwdenk 1086c609719bSwdenk Defines a default value for theIP address of a TFTP 1087c609719bSwdenk server to contact when using the "tftboot" command. 1088c609719bSwdenk 108953a5c424SDavid Updegraff- Multicast TFTP Mode: 109053a5c424SDavid Updegraff CONFIG_MCAST_TFTP 109153a5c424SDavid Updegraff 109253a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 109353a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 109453a5c424SDavid Updegraff tftp down the same boot image concurrently. Note: the ethernet 109553a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 109653a5c424SDavid Updegraff multicast group. 109753a5c424SDavid Updegraff 109853a5c424SDavid Updegraff CONFIG_BOOTP_RANDOM_DELAY 1099c609719bSwdenk- BOOTP Recovery Mode: 1100c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1101c609719bSwdenk 1102c609719bSwdenk If you have many targets in a network that try to 1103c609719bSwdenk boot using BOOTP, you may want to avoid that all 1104c609719bSwdenk systems send out BOOTP requests at precisely the same 1105c609719bSwdenk moment (which would happen for instance at recovery 1106c609719bSwdenk from a power failure, when all systems will try to 1107c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1108c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1109c609719bSwdenk inserted before sending out BOOTP requests. The 11106c33c785SWolfgang Denk following delays are inserted then: 1111c609719bSwdenk 1112c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1113c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1114c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1115c609719bSwdenk 4th and following 1116c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1117c609719bSwdenk 1118fe389a82Sstroese- DHCP Advanced Options: 11191fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 11201fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1121fe389a82Sstroese 11221fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 11231fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 11241fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 11251fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 11261fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 11271fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 11281fe80d79SJon Loeliger CONFIG_BOOTP_DNS 11291fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 11301fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 11311fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 11321fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 11331fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1134fe389a82Sstroese 11355d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 11365d110f0aSWilson Callan environment variable, not the BOOTP server. 1137fe389a82Sstroese 1138fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1139fe389a82Sstroese serverip from a DHCP server, it is possible that more 1140fe389a82Sstroese than one DNS serverip is offered to the client. 1141fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1142fe389a82Sstroese serverip will be stored in the additional environment 1143fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1144fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 11451fe80d79SJon Loeliger is defined. 1146fe389a82Sstroese 1147fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1148fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1149fe389a82Sstroese need the hostname of the DHCP requester. 11505d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 11511fe80d79SJon Loeliger of the "hostname" environment variable is passed as 11521fe80d79SJon Loeliger option 12 to the DHCP server. 1153fe389a82Sstroese 1154a3d991bdSwdenk - CDP Options: 1155a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1156a3d991bdSwdenk 1157a3d991bdSwdenk The device id used in CDP trigger frames. 1158a3d991bdSwdenk 1159a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1160a3d991bdSwdenk 1161a3d991bdSwdenk A two character string which is prefixed to the MAC address 1162a3d991bdSwdenk of the device. 1163a3d991bdSwdenk 1164a3d991bdSwdenk CONFIG_CDP_PORT_ID 1165a3d991bdSwdenk 1166a3d991bdSwdenk A printf format string which contains the ascii name of 1167a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1168a3d991bdSwdenk eth0 for the first ethernet, eth1 for the second etc. 1169a3d991bdSwdenk 1170a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1171a3d991bdSwdenk 1172a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1173a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1174a3d991bdSwdenk 1175a3d991bdSwdenk CONFIG_CDP_VERSION 1176a3d991bdSwdenk 1177a3d991bdSwdenk An ascii string containing the version of the software. 1178a3d991bdSwdenk 1179a3d991bdSwdenk CONFIG_CDP_PLATFORM 1180a3d991bdSwdenk 1181a3d991bdSwdenk An ascii string containing the name of the platform. 1182a3d991bdSwdenk 1183a3d991bdSwdenk CONFIG_CDP_TRIGGER 1184a3d991bdSwdenk 1185a3d991bdSwdenk A 32bit integer sent on the trigger. 1186a3d991bdSwdenk 1187a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1188a3d991bdSwdenk 1189a3d991bdSwdenk A 16bit integer containing the power consumption of the 1190a3d991bdSwdenk device in .1 of milliwatts. 1191a3d991bdSwdenk 1192a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1193a3d991bdSwdenk 1194a3d991bdSwdenk A byte containing the id of the VLAN. 1195a3d991bdSwdenk 1196c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1197c609719bSwdenk 1198c609719bSwdenk Several configurations allow to display the current 1199c609719bSwdenk status using a LED. For instance, the LED will blink 1200c609719bSwdenk fast while running U-Boot code, stop blinking as 1201c609719bSwdenk soon as a reply to a BOOTP request was received, and 1202c609719bSwdenk start blinking slow once the Linux kernel is running 1203c609719bSwdenk (supported by a status LED driver in the Linux 1204c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1205c609719bSwdenk feature in U-Boot. 1206c609719bSwdenk 1207c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1208c609719bSwdenk 1209c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1210c609719bSwdenk on those systems that support this (optional) 1211c609719bSwdenk feature, like the TQM8xxL modules. 1212c609719bSwdenk 1213c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1214c609719bSwdenk 1215b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1216b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1217b37c7e5eSwdenk include the appropriate I2C driver for the selected cpu. 1218c609719bSwdenk 1219b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1220602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1221b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1222b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1223c609719bSwdenk command line interface. 1224c609719bSwdenk 1225bb99ad6dSBen Warren CONFIG_I2C_CMD_TREE is a recommended option that places 1226bb99ad6dSBen Warren all I2C commands under a single 'i2c' root command. The 1227bb99ad6dSBen Warren older 'imm', 'imd', 'iprobe' etc. commands are considered 1228bb99ad6dSBen Warren deprecated and may disappear in the future. 1229bb99ad6dSBen Warren 1230bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1231c609719bSwdenk 1232b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1233b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1234b37c7e5eSwdenk support for I2C. 1235c609719bSwdenk 1236b37c7e5eSwdenk There are several other quantities that must also be 1237b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1238c609719bSwdenk 1239b37c7e5eSwdenk In both cases you will need to define CFG_I2C_SPEED 1240b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1241b37c7e5eSwdenk to run and CFG_I2C_SLAVE to be the address of this node (ie 1242b37c7e5eSwdenk the cpu's i2c node address). 1243c609719bSwdenk 1244b37c7e5eSwdenk Now, the u-boot i2c code for the mpc8xx (cpu/mpc8xx/i2c.c) 1245b37c7e5eSwdenk sets the cpu up as a master node and so its address should 1246b37c7e5eSwdenk therefore be cleared to 0 (See, eg, MPC823e User's Manual 1247b37c7e5eSwdenk p.16-473). So, set CFG_I2C_SLAVE to 0. 1248b37c7e5eSwdenk 1249b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1250b37c7e5eSwdenk 1251b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1252b37c7e5eSwdenk then the following macros need to be defined (examples are 1253b37c7e5eSwdenk from include/configs/lwmon.h): 1254c609719bSwdenk 1255c609719bSwdenk I2C_INIT 1256c609719bSwdenk 1257b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1258c609719bSwdenk controller or configure ports. 1259c609719bSwdenk 1260b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1261b37c7e5eSwdenk 1262c609719bSwdenk I2C_PORT 1263c609719bSwdenk 1264c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1265c609719bSwdenk assumes both bits are on the same port). Valid values 1266c609719bSwdenk are 0..3 for ports A..D. 1267c609719bSwdenk 1268c609719bSwdenk I2C_ACTIVE 1269c609719bSwdenk 1270c609719bSwdenk The code necessary to make the I2C data line active 1271c609719bSwdenk (driven). If the data line is open collector, this 1272c609719bSwdenk define can be null. 1273c609719bSwdenk 1274b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1275b37c7e5eSwdenk 1276c609719bSwdenk I2C_TRISTATE 1277c609719bSwdenk 1278c609719bSwdenk The code necessary to make the I2C data line tri-stated 1279c609719bSwdenk (inactive). If the data line is open collector, this 1280c609719bSwdenk define can be null. 1281c609719bSwdenk 1282b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1283b37c7e5eSwdenk 1284c609719bSwdenk I2C_READ 1285c609719bSwdenk 1286c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1287c609719bSwdenk FALSE if it is low. 1288c609719bSwdenk 1289b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1290b37c7e5eSwdenk 1291c609719bSwdenk I2C_SDA(bit) 1292c609719bSwdenk 1293c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1294c609719bSwdenk is FALSE, it clears it (low). 1295c609719bSwdenk 1296b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1297b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1298b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1299b37c7e5eSwdenk 1300c609719bSwdenk I2C_SCL(bit) 1301c609719bSwdenk 1302c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1303c609719bSwdenk is FALSE, it clears it (low). 1304c609719bSwdenk 1305b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1306b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1307b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1308b37c7e5eSwdenk 1309c609719bSwdenk I2C_DELAY 1310c609719bSwdenk 1311c609719bSwdenk This delay is invoked four times per clock cycle so this 1312c609719bSwdenk controls the rate of data transfer. The data rate thus 1313b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1314b37c7e5eSwdenk like: 1315b37c7e5eSwdenk 1316b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1317c609719bSwdenk 131847cd00faSwdenk CFG_I2C_INIT_BOARD 131947cd00faSwdenk 132047cd00faSwdenk When a board is reset during an i2c bus transfer 132147cd00faSwdenk chips might think that the current transfer is still 132247cd00faSwdenk in progress. On some boards it is possible to access 132347cd00faSwdenk the i2c SCLK line directly, either by using the 132447cd00faSwdenk processor pin as a GPIO or by having a second pin 132547cd00faSwdenk connected to the bus. If this option is defined a 132647cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 132747cd00faSwdenk is run early in the boot sequence. 132847cd00faSwdenk 132917ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 133017ea1177Swdenk 133117ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 133217ea1177Swdenk in u-boot bd_info structure based on u-boot environment 133317ea1177Swdenk variable "i2cfast". (see also i2cfast) 133417ea1177Swdenk 1335bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1336bb99ad6dSBen Warren 1337bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1338bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1339bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1340bb99ad6dSBen Warren Note that bus numbering is zero-based. 1341bb99ad6dSBen Warren 1342bb99ad6dSBen Warren CFG_I2C_NOPROBES 1343bb99ad6dSBen Warren 1344bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1345bb99ad6dSBen Warren when the 'i2c probe' command is issued (or 'iprobe' using the legacy 1346bb99ad6dSBen Warren command). If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device 1347bb99ad6dSBen Warren pairs. Otherwise, specify a 1D array of device addresses 1348bb99ad6dSBen Warren 1349bb99ad6dSBen Warren e.g. 1350bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1351bb99ad6dSBen Warren #define CFG_I2C_NOPROBES {0x50,0x68} 1352bb99ad6dSBen Warren 1353bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1354bb99ad6dSBen Warren 1355bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1356bb99ad6dSBen Warren #define CFG_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1357bb99ad6dSBen Warren 1358bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1359bb99ad6dSBen Warren 1360be5e6181STimur Tabi CFG_SPD_BUS_NUM 1361be5e6181STimur Tabi 1362be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1363be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1364be5e6181STimur Tabi 13650dc018ecSStefan Roese CFG_RTC_BUS_NUM 13660dc018ecSStefan Roese 13670dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 13680dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 13690dc018ecSStefan Roese 13700dc018ecSStefan Roese CFG_DTT_BUS_NUM 13710dc018ecSStefan Roese 13720dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 13730dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 13740dc018ecSStefan Roese 1375be5e6181STimur Tabi CONFIG_FSL_I2C 1376be5e6181STimur Tabi 1377be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 13787817cb20SMarcel Ziswiler drivers/i2c/fsl_i2c.c. 1379be5e6181STimur Tabi 1380be5e6181STimur Tabi 1381c609719bSwdenk- SPI Support: CONFIG_SPI 1382c609719bSwdenk 1383c609719bSwdenk Enables SPI driver (so far only tested with 1384c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1385c609719bSwdenk D/As on the SACSng board) 1386c609719bSwdenk 1387c609719bSwdenk CONFIG_SPI_X 1388c609719bSwdenk 1389c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1390c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1391c609719bSwdenk 1392c609719bSwdenk CONFIG_SOFT_SPI 1393c609719bSwdenk 1394c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1395c609719bSwdenk using hardware support. This is a general purpose 1396c609719bSwdenk driver that only requires three general I/O port pins 1397c609719bSwdenk (two outputs, one input) to function. If this is 1398c609719bSwdenk defined, the board configuration must define several 1399c609719bSwdenk SPI configuration items (port pins to use, etc). For 1400c609719bSwdenk an example, see include/configs/sacsng.h. 1401c609719bSwdenk 140204a9e118SBen Warren CONFIG_HARD_SPI 140304a9e118SBen Warren 140404a9e118SBen Warren Enables a hardware SPI driver for general-purpose reads 140504a9e118SBen Warren and writes. As with CONFIG_SOFT_SPI, the board configuration 140604a9e118SBen Warren must define a list of chip-select function pointers. 140704a9e118SBen Warren Currently supported on some MPC8xxx processors. For an 140804a9e118SBen Warren example, see include/configs/mpc8349emds.h. 140904a9e118SBen Warren 14100133502eSMatthias Fuchs- FPGA Support: CONFIG_FPGA 14110133502eSMatthias Fuchs 14120133502eSMatthias Fuchs Enables FPGA subsystem. 14130133502eSMatthias Fuchs 14140133502eSMatthias Fuchs CONFIG_FPGA_<vendor> 14150133502eSMatthias Fuchs 14160133502eSMatthias Fuchs Enables support for specific chip vendors. 14170133502eSMatthias Fuchs (ALTERA, XILINX) 14180133502eSMatthias Fuchs 14190133502eSMatthias Fuchs CONFIG_FPGA_<family> 14200133502eSMatthias Fuchs 14210133502eSMatthias Fuchs Enables support for FPGA family. 14220133502eSMatthias Fuchs (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) 14230133502eSMatthias Fuchs 14240133502eSMatthias Fuchs CONFIG_FPGA_COUNT 1425c609719bSwdenk 1426c609719bSwdenk Specify the number of FPGA devices to support. 1427c609719bSwdenk 1428c609719bSwdenk CFG_FPGA_PROG_FEEDBACK 1429c609719bSwdenk 1430c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1431c609719bSwdenk 1432c609719bSwdenk CFG_FPGA_CHECK_BUSY 1433c609719bSwdenk 1434c609719bSwdenk Enable checks on FPGA configuration interface busy 1435c609719bSwdenk status by the configuration function. This option 1436c609719bSwdenk will require a board or device specific function to 1437c609719bSwdenk be written. 1438c609719bSwdenk 1439c609719bSwdenk CONFIG_FPGA_DELAY 1440c609719bSwdenk 1441c609719bSwdenk If defined, a function that provides delays in the FPGA 1442c609719bSwdenk configuration driver. 1443c609719bSwdenk 1444c609719bSwdenk CFG_FPGA_CHECK_CTRLC 1445c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1446c609719bSwdenk 1447c609719bSwdenk CFG_FPGA_CHECK_ERROR 1448c609719bSwdenk 1449c609719bSwdenk Check for configuration errors during FPGA bitfile 1450c609719bSwdenk loading. For example, abort during Virtex II 1451c609719bSwdenk configuration if the INIT_B line goes low (which 1452c609719bSwdenk indicated a CRC error). 1453c609719bSwdenk 1454c609719bSwdenk CFG_FPGA_WAIT_INIT 1455c609719bSwdenk 1456c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1457c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1458c609719bSwdenk FPGA configuration sequence. The default time is 500 1459c609719bSwdenk mS. 1460c609719bSwdenk 1461c609719bSwdenk CFG_FPGA_WAIT_BUSY 1462c609719bSwdenk 1463c609719bSwdenk Maximum time to wait for BUSY to deassert during 1464c609719bSwdenk Virtex II FPGA configuration. The default is 5 mS. 1465c609719bSwdenk 1466c609719bSwdenk CFG_FPGA_WAIT_CONFIG 1467c609719bSwdenk 1468c609719bSwdenk Time to wait after FPGA configuration. The default is 1469c609719bSwdenk 200 mS. 1470c609719bSwdenk 1471c609719bSwdenk- Configuration Management: 1472c609719bSwdenk CONFIG_IDENT_STRING 1473c609719bSwdenk 1474c609719bSwdenk If defined, this string will be added to the U-Boot 1475c609719bSwdenk version information (U_BOOT_VERSION) 1476c609719bSwdenk 1477c609719bSwdenk- Vendor Parameter Protection: 1478c609719bSwdenk 1479c609719bSwdenk U-Boot considers the values of the environment 1480c609719bSwdenk variables "serial#" (Board Serial Number) and 14817152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1482c609719bSwdenk are set once by the board vendor / manufacturer, and 1483c609719bSwdenk protects these variables from casual modification by 1484c609719bSwdenk the user. Once set, these variables are read-only, 1485c609719bSwdenk and write or delete attempts are rejected. You can 1486c609719bSwdenk change this behviour: 1487c609719bSwdenk 1488c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1489c609719bSwdenk file, the write protection for vendor parameters is 149047cd00faSwdenk completely disabled. Anybody can change or delete 1491c609719bSwdenk these parameters. 1492c609719bSwdenk 1493c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1494c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 1495c609719bSwdenk ethernet address is installed in the environment, 1496c609719bSwdenk which can be changed exactly ONCE by the user. [The 1497c609719bSwdenk serial# is unaffected by this, i. e. it remains 1498c609719bSwdenk read-only.] 1499c609719bSwdenk 1500c609719bSwdenk- Protected RAM: 1501c609719bSwdenk CONFIG_PRAM 1502c609719bSwdenk 1503c609719bSwdenk Define this variable to enable the reservation of 1504c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1505c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1506c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1507c609719bSwdenk this default value by defining an environment 1508c609719bSwdenk variable "pram" to the number of kB you want to 1509c609719bSwdenk reserve. Note that the board info structure will 1510c609719bSwdenk still show the full amount of RAM. If pRAM is 1511c609719bSwdenk reserved, a new environment variable "mem" will 1512c609719bSwdenk automatically be defined to hold the amount of 1513c609719bSwdenk remaining RAM in a form that can be passed as boot 1514c609719bSwdenk argument to Linux, for instance like that: 1515c609719bSwdenk 1516fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1517c609719bSwdenk saveenv 1518c609719bSwdenk 1519c609719bSwdenk This way you can tell Linux not to use this memory, 1520c609719bSwdenk either, which results in a memory region that will 1521c609719bSwdenk not be affected by reboots. 1522c609719bSwdenk 1523c609719bSwdenk *WARNING* If your board configuration uses automatic 1524c609719bSwdenk detection of the RAM size, you must make sure that 1525c609719bSwdenk this memory test is non-destructive. So far, the 1526c609719bSwdenk following board configurations are known to be 1527c609719bSwdenk "pRAM-clean": 1528c609719bSwdenk 1529c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1530c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1531c609719bSwdenk PCU_E, FLAGADM, TQM8260 1532c609719bSwdenk 1533c609719bSwdenk- Error Recovery: 1534c609719bSwdenk CONFIG_PANIC_HANG 1535c609719bSwdenk 1536c609719bSwdenk Define this variable to stop the system in case of a 1537c609719bSwdenk fatal error, so that you have to reset it manually. 1538c609719bSwdenk This is probably NOT a good idea for an embedded 1539c609719bSwdenk system where you want to system to reboot 1540c609719bSwdenk automatically as fast as possible, but it may be 1541c609719bSwdenk useful during development since you can try to debug 1542c609719bSwdenk the conditions that lead to the situation. 1543c609719bSwdenk 1544c609719bSwdenk CONFIG_NET_RETRY_COUNT 1545c609719bSwdenk 1546c609719bSwdenk This variable defines the number of retries for 1547c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1548c609719bSwdenk before giving up the operation. If not defined, a 1549c609719bSwdenk default value of 5 is used. 1550c609719bSwdenk 1551c609719bSwdenk- Command Interpreter: 15528078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 155304a85b3bSwdenk 155404a85b3bSwdenk Enable auto completion of commands using TAB. 155504a85b3bSwdenk 15568078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 15578078f1a5SWolfgang Denk for the "hush" shell. 15588078f1a5SWolfgang Denk 15598078f1a5SWolfgang Denk 1560c609719bSwdenk CFG_HUSH_PARSER 1561c609719bSwdenk 1562c609719bSwdenk Define this variable to enable the "hush" shell (from 1563c609719bSwdenk Busybox) as command line interpreter, thus enabling 1564c609719bSwdenk powerful command line syntax like 1565c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 1566c609719bSwdenk constructs ("shell scripts"). 1567c609719bSwdenk 1568c609719bSwdenk If undefined, you get the old, much simpler behaviour 1569c609719bSwdenk with a somewhat smaller memory footprint. 1570c609719bSwdenk 1571c609719bSwdenk 1572c609719bSwdenk CFG_PROMPT_HUSH_PS2 1573c609719bSwdenk 1574c609719bSwdenk This defines the secondary prompt string, which is 1575c609719bSwdenk printed when the command interpreter needs more input 1576c609719bSwdenk to complete a command. Usually "> ". 1577c609719bSwdenk 1578c609719bSwdenk Note: 1579c609719bSwdenk 1580c609719bSwdenk In the current implementation, the local variables 1581c609719bSwdenk space and global environment variables space are 1582c609719bSwdenk separated. Local variables are those you define by 15833b57fe0aSwdenk simply typing `name=value'. To access a local 1584c609719bSwdenk variable later on, you have write `$name' or 15853b57fe0aSwdenk `${name}'; to execute the contents of a variable 15863b57fe0aSwdenk directly type `$name' at the command prompt. 1587c609719bSwdenk 1588c609719bSwdenk Global environment variables are those you use 1589c609719bSwdenk setenv/printenv to work with. To run a command stored 1590c609719bSwdenk in such a variable, you need to use the run command, 1591c609719bSwdenk and you must not use the '$' sign to access them. 1592c609719bSwdenk 1593c609719bSwdenk To store commands and special characters in a 1594c609719bSwdenk variable, please use double quotation marks 1595c609719bSwdenk surrounding the whole text of the variable, instead 1596c609719bSwdenk of the backslashes before semicolons and special 1597c609719bSwdenk symbols. 1598c609719bSwdenk 1599aa0c71acSWolfgang Denk- Commandline Editing and History: 1600aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 1601aa0c71acSWolfgang Denk 1602aa0c71acSWolfgang Denk Enable editiong and History functions for interactive 1603aa0c71acSWolfgang Denk commandline input operations 1604aa0c71acSWolfgang Denk 1605a8c7c708Swdenk- Default Environment: 1606c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 1607c609719bSwdenk 1608c609719bSwdenk Define this to contain any number of null terminated 1609c609719bSwdenk strings (variable = value pairs) that will be part of 16107152b1d0Swdenk the default environment compiled into the boot image. 16112262cfeeSwdenk 1612c609719bSwdenk For example, place something like this in your 1613c609719bSwdenk board's config file: 1614c609719bSwdenk 1615c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 1616c609719bSwdenk "myvar1=value1\0" \ 1617c609719bSwdenk "myvar2=value2\0" 1618c609719bSwdenk 1619c609719bSwdenk Warning: This method is based on knowledge about the 1620c609719bSwdenk internal format how the environment is stored by the 16212262cfeeSwdenk U-Boot code. This is NOT an official, exported 1622c609719bSwdenk interface! Although it is unlikely that this format 16237152b1d0Swdenk will change soon, there is no guarantee either. 1624c609719bSwdenk You better know what you are doing here. 1625c609719bSwdenk 1626c609719bSwdenk Note: overly (ab)use of the default environment is 1627c609719bSwdenk discouraged. Make sure to check other ways to preset 1628c609719bSwdenk the environment like the autoscript function or the 1629c609719bSwdenk boot command first. 1630c609719bSwdenk 1631a8c7c708Swdenk- DataFlash Support: 16322abbe075Swdenk CONFIG_HAS_DATAFLASH 16332abbe075Swdenk 16342abbe075Swdenk Defining this option enables DataFlash features and 16352abbe075Swdenk allows to read/write in Dataflash via the standard 16362abbe075Swdenk commands cp, md... 16372abbe075Swdenk 16383f85ce27Swdenk- SystemACE Support: 16393f85ce27Swdenk CONFIG_SYSTEMACE 16403f85ce27Swdenk 16413f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 16423f85ce27Swdenk chips attached via some sort of local bus. The address 16433f85ce27Swdenk of the chip must alsh be defined in the 16443f85ce27Swdenk CFG_SYSTEMACE_BASE macro. For example: 16453f85ce27Swdenk 16463f85ce27Swdenk #define CONFIG_SYSTEMACE 16473f85ce27Swdenk #define CFG_SYSTEMACE_BASE 0xf0000000 16483f85ce27Swdenk 16493f85ce27Swdenk When SystemACE support is added, the "ace" device type 16503f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 16513f85ce27Swdenk 1652ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 1653ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 1654ecb0ccd9SWolfgang Denk 165528cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 1656ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 165728cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 1658ecb0ccd9SWolfgang Denk number generator is used. 1659ecb0ccd9SWolfgang Denk 166028cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 166128cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 166228cb9375SWolfgang Denk defined, the normal port 69 is used. 166328cb9375SWolfgang Denk 166428cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 1665ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 1666ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 1667ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 1668ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 1669ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 1670ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 1671ecb0ccd9SWolfgang Denk 1672a8c7c708Swdenk- Show boot progress: 1673c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 1674c609719bSwdenk 1675c609719bSwdenk Defining this option allows to add some board- 1676c609719bSwdenk specific code (calling a user-provided function 1677c609719bSwdenk "show_boot_progress(int)") that enables you to show 1678c609719bSwdenk the system's boot progress on some display (for 1679c609719bSwdenk example, some LED's) on your board. At the moment, 1680c609719bSwdenk the following checkpoints are implemented: 1681c609719bSwdenk 16821372cce2SMarian BalakowiczLegacy uImage format: 16831372cce2SMarian Balakowicz 1684c609719bSwdenk Arg Where When 1685c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 1686c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 1687c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 1688c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 1689c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 1690c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 1691c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 1692c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 1693c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 16941372cce2SMarian Balakowicz -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) 1695c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 1696c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 1697c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 1698c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 16991372cce2SMarian Balakowicz 8 common/cmd_bootm.c No uncompress/copy overwrite error 1700c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 17011372cce2SMarian Balakowicz 17021372cce2SMarian Balakowicz 9 common/image.c Start initial ramdisk verification 17031372cce2SMarian Balakowicz -10 common/image.c Ramdisk header has bad magic number 17041372cce2SMarian Balakowicz -11 common/image.c Ramdisk header has bad checksum 17051372cce2SMarian Balakowicz 10 common/image.c Ramdisk header is OK 17061372cce2SMarian Balakowicz -12 common/image.c Ramdisk data has bad checksum 17071372cce2SMarian Balakowicz 11 common/image.c Ramdisk data has correct checksum 17081372cce2SMarian Balakowicz 12 common/image.c Ramdisk verification complete, start loading 17091372cce2SMarian Balakowicz -13 common/image.c Wrong Image Type (not PPC Linux Ramdisk) 17101372cce2SMarian Balakowicz 13 common/image.c Start multifile image verification 17111372cce2SMarian Balakowicz 14 common/image.c No initial ramdisk, no multifile, continue. 17121372cce2SMarian Balakowicz 17131372cce2SMarian Balakowicz 15 lib_<arch>/bootm.c All preparation done, transferring control to OS 1714c609719bSwdenk 171563e73c9aSwdenk -30 lib_ppc/board.c Fatal error, hang the system 171663e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 171763e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 171863e73c9aSwdenk 1719566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 1720566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 1721566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 1722566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 1723566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 1724566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 1725566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 1726566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 1727566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 1728566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 1729566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 1730566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 1731566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 1732566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 1733566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 1734566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 1735566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 1736566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 1737566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 1738566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 1739566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 1740566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 1741566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 1742566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 1743566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 1744566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 1745566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 1746566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 1747566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 1748566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 1749566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 1750566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 1751566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 1752566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 1753566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 1754566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 1755566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 1756566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 1757566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 1758566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 1759566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 1760566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 1761566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 1762566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 1763566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 1764566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 1765566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 1766c609719bSwdenk 1767566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 1768c609719bSwdenk 1769566a494fSHeiko Schocher 64 net/eth.c starting with Ethernetconfiguration. 1770566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 1771566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 1772206c60cbSwdenk 1773566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 1774566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 1775566a494fSHeiko Schocher -81 common/cmd_net.c some error in NetLoop() occured 1776566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 1777566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 1778566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 1779566a494fSHeiko Schocher 83 common/cmd_net.c running autoscript 1780566a494fSHeiko Schocher -83 common/cmd_net.c some error in automatic boot or autoscript 1781566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 1782c609719bSwdenk 17831372cce2SMarian BalakowiczFIT uImage format: 17841372cce2SMarian Balakowicz 17851372cce2SMarian Balakowicz Arg Where When 17861372cce2SMarian Balakowicz 100 common/cmd_bootm.c Kernel FIT Image has correct format 17871372cce2SMarian Balakowicz -100 common/cmd_bootm.c Kernel FIT Image has incorrect format 17881372cce2SMarian Balakowicz 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration 17891372cce2SMarian Balakowicz -101 common/cmd_bootm.c Can't get configuration for kernel subimage 17901372cce2SMarian Balakowicz 102 common/cmd_bootm.c Kernel unit name specified 17911372cce2SMarian Balakowicz -103 common/cmd_bootm.c Can't get kernel subimage node offset 1792f773bea8SMarian Balakowicz 103 common/cmd_bootm.c Found configuration node 17931372cce2SMarian Balakowicz 104 common/cmd_bootm.c Got kernel subimage node offset 17941372cce2SMarian Balakowicz -104 common/cmd_bootm.c Kernel subimage hash verification failed 17951372cce2SMarian Balakowicz 105 common/cmd_bootm.c Kernel subimage hash verification OK 17961372cce2SMarian Balakowicz -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture 17971372cce2SMarian Balakowicz 106 common/cmd_bootm.c Architecture check OK 17981372cce2SMarian Balakowicz -106 common/cmd_bootm.c Kernel subimage has wrong typea 17991372cce2SMarian Balakowicz 107 common/cmd_bootm.c Kernel subimge type OK 18001372cce2SMarian Balakowicz -107 common/cmd_bootm.c Can't get kernel subimage data/size 18011372cce2SMarian Balakowicz 108 common/cmd_bootm.c Got kernel subimage data/size 18021372cce2SMarian Balakowicz -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) 18031372cce2SMarian Balakowicz -109 common/cmd_bootm.c Can't get kernel subimage type 18041372cce2SMarian Balakowicz -110 common/cmd_bootm.c Can't get kernel subimage comp 18051372cce2SMarian Balakowicz -111 common/cmd_bootm.c Can't get kernel subimage os 18061372cce2SMarian Balakowicz -112 common/cmd_bootm.c Can't get kernel subimage load address 18071372cce2SMarian Balakowicz -113 common/cmd_bootm.c Image uncompress/copy overwrite error 18081372cce2SMarian Balakowicz 18091372cce2SMarian Balakowicz 120 common/image.c Start initial ramdisk verification 18101372cce2SMarian Balakowicz -120 common/image.c Ramdisk FIT image has incorrect format 18111372cce2SMarian Balakowicz 121 common/image.c Ramdisk FIT image has correct format 18121372cce2SMarian Balakowicz 122 common/image.c No Ramdisk subimage unit name, using configuration 18131372cce2SMarian Balakowicz -122 common/image.c Can't get configuration for ramdisk subimage 18141372cce2SMarian Balakowicz 123 common/image.c Ramdisk unit name specified 18151372cce2SMarian Balakowicz -124 common/image.c Can't get ramdisk subimage node offset 18161372cce2SMarian Balakowicz 125 common/image.c Got ramdisk subimage node offset 18171372cce2SMarian Balakowicz -125 common/image.c Ramdisk subimage hash verification failed 18181372cce2SMarian Balakowicz 126 common/image.c Ramdisk subimage hash verification OK 18191372cce2SMarian Balakowicz -126 common/image.c Ramdisk subimage for unsupported architecture 18201372cce2SMarian Balakowicz 127 common/image.c Architecture check OK 18211372cce2SMarian Balakowicz -127 common/image.c Can't get ramdisk subimage data/size 18221372cce2SMarian Balakowicz 128 common/image.c Got ramdisk subimage data/size 18231372cce2SMarian Balakowicz 129 common/image.c Can't get ramdisk load address 18241372cce2SMarian Balakowicz -129 common/image.c Got ramdisk load address 18251372cce2SMarian Balakowicz 18261372cce2SMarian Balakowicz -130 common/cmd_doc.c Icorrect FIT image format 18271372cce2SMarian Balakowicz 131 common/cmd_doc.c FIT image format OK 18281372cce2SMarian Balakowicz 18291372cce2SMarian Balakowicz -140 common/cmd_ide.c Icorrect FIT image format 18301372cce2SMarian Balakowicz 141 common/cmd_ide.c FIT image format OK 18311372cce2SMarian Balakowicz 18321372cce2SMarian Balakowicz -150 common/cmd_nand.c Icorrect FIT image format 18331372cce2SMarian Balakowicz 151 common/cmd_nand.c FIT image format OK 18341372cce2SMarian Balakowicz 18351372cce2SMarian Balakowicz 1836c609719bSwdenkModem Support: 1837c609719bSwdenk-------------- 1838c609719bSwdenk 183985ec0bccSwdenk[so far only for SMDK2400 and TRAB boards] 1840c609719bSwdenk 1841c609719bSwdenk- Modem support endable: 1842c609719bSwdenk CONFIG_MODEM_SUPPORT 1843c609719bSwdenk 1844c609719bSwdenk- RTS/CTS Flow control enable: 1845c609719bSwdenk CONFIG_HWFLOW 1846c609719bSwdenk 1847c609719bSwdenk- Modem debug support: 1848c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 1849c609719bSwdenk 1850c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 1851c609719bSwdenk for modem support. Useful only with BDI2000. 1852c609719bSwdenk 1853a8c7c708Swdenk- Interrupt support (PPC): 1854a8c7c708Swdenk 1855a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 1856a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 1857a8c7c708Swdenk for cpu specific initialization. interrupt_init_cpu() 1858a8c7c708Swdenk should set decrementer_count to appropriate value. If 1859a8c7c708Swdenk cpu resets decrementer automatically after interrupt 1860a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 1861a8c7c708Swdenk timer_interrupt() calls timer_interrupt_cpu() for cpu 1862a8c7c708Swdenk specific handling. If board has watchdog / status_led 1863a8c7c708Swdenk / other_activity_monitor it works automatically from 1864a8c7c708Swdenk general timer_interrupt(). 1865a8c7c708Swdenk 1866c609719bSwdenk- General: 1867c609719bSwdenk 1868c609719bSwdenk In the target system modem support is enabled when a 1869c609719bSwdenk specific key (key combination) is pressed during 1870c609719bSwdenk power-on. Otherwise U-Boot will boot normally 1871c609719bSwdenk (autoboot). The key_pressed() fuction is called from 1872c609719bSwdenk board_init(). Currently key_pressed() is a dummy 1873c609719bSwdenk function, returning 1 and thus enabling modem 1874c609719bSwdenk initialization. 1875c609719bSwdenk 1876c609719bSwdenk If there are no modem init strings in the 1877c609719bSwdenk environment, U-Boot proceed to autoboot; the 1878c609719bSwdenk previous output (banner, info printfs) will be 1879c609719bSwdenk supressed, though. 1880c609719bSwdenk 1881c609719bSwdenk See also: doc/README.Modem 1882c609719bSwdenk 1883c609719bSwdenk 1884c609719bSwdenkConfiguration Settings: 1885c609719bSwdenk----------------------- 1886c609719bSwdenk 1887c609719bSwdenk- CFG_LONGHELP: Defined when you want long help messages included; 1888c609719bSwdenk undefine this when you're short of memory. 1889c609719bSwdenk 1890c609719bSwdenk- CFG_PROMPT: This is what U-Boot prints on the console to 1891c609719bSwdenk prompt for user input. 1892c609719bSwdenk 1893c609719bSwdenk- CFG_CBSIZE: Buffer size for input from the Console 1894c609719bSwdenk 1895c609719bSwdenk- CFG_PBSIZE: Buffer size for Console output 1896c609719bSwdenk 1897c609719bSwdenk- CFG_MAXARGS: max. Number of arguments accepted for monitor commands 1898c609719bSwdenk 1899c609719bSwdenk- CFG_BARGSIZE: Buffer size for Boot Arguments which are passed to 1900c609719bSwdenk the application (usually a Linux kernel) when it is 1901c609719bSwdenk booted 1902c609719bSwdenk 1903c609719bSwdenk- CFG_BAUDRATE_TABLE: 1904c609719bSwdenk List of legal baudrate settings for this board. 1905c609719bSwdenk 1906c609719bSwdenk- CFG_CONSOLE_INFO_QUIET 1907c609719bSwdenk Suppress display of console information at boot. 1908c609719bSwdenk 1909c609719bSwdenk- CFG_CONSOLE_IS_IN_ENV 1910c609719bSwdenk If the board specific function 1911c609719bSwdenk extern int overwrite_console (void); 1912c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 1913c609719bSwdenk serial port, else the settings in the environment are used. 1914c609719bSwdenk 1915c609719bSwdenk- CFG_CONSOLE_OVERWRITE_ROUTINE 1916c609719bSwdenk Enable the call to overwrite_console(). 1917c609719bSwdenk 1918c609719bSwdenk- CFG_CONSOLE_ENV_OVERWRITE 1919c609719bSwdenk Enable overwrite of previous console environment settings. 1920c609719bSwdenk 1921c609719bSwdenk- CFG_MEMTEST_START, CFG_MEMTEST_END: 1922c609719bSwdenk Begin and End addresses of the area used by the 1923c609719bSwdenk simple memory test. 1924c609719bSwdenk 1925c609719bSwdenk- CFG_ALT_MEMTEST: 1926c609719bSwdenk Enable an alternate, more extensive memory test. 1927c609719bSwdenk 19285f535fe1Swdenk- CFG_MEMTEST_SCRATCH: 19295f535fe1Swdenk Scratch address used by the alternate memory test 19305f535fe1Swdenk You only need to set this if address zero isn't writeable 19315f535fe1Swdenk 1932c609719bSwdenk- CFG_TFTP_LOADADDR: 1933c609719bSwdenk Default load address for network file downloads 1934c609719bSwdenk 1935c609719bSwdenk- CFG_LOADS_BAUD_CHANGE: 1936c609719bSwdenk Enable temporary baudrate change while serial download 1937c609719bSwdenk 1938c609719bSwdenk- CFG_SDRAM_BASE: 1939c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 1940c609719bSwdenk 1941c609719bSwdenk- CFG_MBIO_BASE: 1942c609719bSwdenk Physical start address of Motherboard I/O (if using a 1943c609719bSwdenk Cogent motherboard) 1944c609719bSwdenk 1945c609719bSwdenk- CFG_FLASH_BASE: 1946c609719bSwdenk Physical start address of Flash memory. 1947c609719bSwdenk 1948c609719bSwdenk- CFG_MONITOR_BASE: 1949c609719bSwdenk Physical start address of boot monitor code (set by 1950c609719bSwdenk make config files to be same as the text base address 1951c609719bSwdenk (TEXT_BASE) used when linking) - same as 1952c609719bSwdenk CFG_FLASH_BASE when booting from flash. 1953c609719bSwdenk 1954c609719bSwdenk- CFG_MONITOR_LEN: 19553b57fe0aSwdenk Size of memory reserved for monitor code, used to 19563b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 19573b57fe0aSwdenk embedded within the U-Boot image, or in a separate 19583b57fe0aSwdenk flash sector. 1959c609719bSwdenk 1960c609719bSwdenk- CFG_MALLOC_LEN: 1961c609719bSwdenk Size of DRAM reserved for malloc() use. 1962c609719bSwdenk 196315940c9aSStefan Roese- CFG_BOOTM_LEN: 196415940c9aSStefan Roese Normally compressed uImages are limited to an 196515940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 196615940c9aSStefan Roese you can define CFG_BOOTM_LEN in your board config file 196715940c9aSStefan Roese to adjust this setting to your needs. 1968c609719bSwdenk 1969c609719bSwdenk- CFG_BOOTMAPSZ: 1970c609719bSwdenk Maximum size of memory mapped by the startup code of 1971c609719bSwdenk the Linux kernel; all data that must be processed by 1972c609719bSwdenk the Linux kernel (bd_info, boot arguments, eventually 1973c609719bSwdenk initrd image) must be put below this limit. 1974c609719bSwdenk 1975c609719bSwdenk- CFG_MAX_FLASH_BANKS: 1976c609719bSwdenk Max number of Flash memory banks 1977c609719bSwdenk 1978c609719bSwdenk- CFG_MAX_FLASH_SECT: 1979c609719bSwdenk Max number of sectors on a Flash chip 1980c609719bSwdenk 1981c609719bSwdenk- CFG_FLASH_ERASE_TOUT: 1982c609719bSwdenk Timeout for Flash erase operations (in ms) 1983c609719bSwdenk 1984c609719bSwdenk- CFG_FLASH_WRITE_TOUT: 1985c609719bSwdenk Timeout for Flash write operations (in ms) 1986c609719bSwdenk 19878564acf9Swdenk- CFG_FLASH_LOCK_TOUT 19888564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 19898564acf9Swdenk 19908564acf9Swdenk- CFG_FLASH_UNLOCK_TOUT 19918564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 19928564acf9Swdenk 19938564acf9Swdenk- CFG_FLASH_PROTECTION 19948564acf9Swdenk If defined, hardware flash sectors protection is used 19958564acf9Swdenk instead of U-Boot software protection. 19968564acf9Swdenk 1997c609719bSwdenk- CFG_DIRECT_FLASH_TFTP: 1998c609719bSwdenk 1999c609719bSwdenk Enable TFTP transfers directly to flash memory; 2000c609719bSwdenk without this option such a download has to be 2001c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 2002c609719bSwdenk copy from RAM to flash. 2003c609719bSwdenk 2004c609719bSwdenk The two-step approach is usually more reliable, since 2005c609719bSwdenk you can check if the download worked before you erase 2006c609719bSwdenk the flash, but in some situations (when sytem RAM is 2007c609719bSwdenk too limited to allow for a tempory copy of the 2008c609719bSwdenk downloaded image) this option may be very useful. 2009c609719bSwdenk 2010c609719bSwdenk- CFG_FLASH_CFI: 2011c609719bSwdenk Define if the flash driver uses extra elements in the 20125653fc33Swdenk common flash structure for storing flash geometry. 20135653fc33Swdenk 20145653fc33Swdenk- CFG_FLASH_CFI_DRIVER 20155653fc33Swdenk This option also enables the building of the cfi_flash driver 20165653fc33Swdenk in the drivers directory 201753cf9435Sstroese 20185568e613SStefan Roese- CFG_FLASH_QUIET_TEST 20195568e613SStefan Roese If this option is defined, the common CFI flash doesn't 20205568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 20215568e613SStefan Roese is useful, if some of the configured banks are only 20225568e613SStefan Roese optionally available. 20235568e613SStefan Roese 20249a042e9cSJerry Van Baren- CONFIG_FLASH_SHOW_PROGRESS 20259a042e9cSJerry Van Baren If defined (must be an integer), print out countdown 20269a042e9cSJerry Van Baren digits and dots. Recommended value: 45 (9..1) for 80 20279a042e9cSJerry Van Baren column displays, 15 (3..1) for 40 column displays. 20289a042e9cSJerry Van Baren 202953cf9435Sstroese- CFG_RX_ETH_BUFFER: 203053cf9435Sstroese Defines the number of ethernet receive buffers. On some 203153cf9435Sstroese ethernet controllers it is recommended to set this value 203253cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 203353cf9435Sstroese buffers can be full shortly after enabling the interface 203453cf9435Sstroese on high ethernet traffic. 203553cf9435Sstroese Defaults to 4 if not defined. 2036c609719bSwdenk 2037c609719bSwdenkThe following definitions that deal with the placement and management 2038c609719bSwdenkof environment data (variable area); in general, we support the 2039c609719bSwdenkfollowing configurations: 2040c609719bSwdenk 2041c609719bSwdenk- CFG_ENV_IS_IN_FLASH: 2042c609719bSwdenk 2043c609719bSwdenk Define this if the environment is in flash memory. 2044c609719bSwdenk 2045c609719bSwdenk a) The environment occupies one whole flash sector, which is 2046c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 2047c609719bSwdenk happens usually with "bottom boot sector" or "top boot 2048c609719bSwdenk sector" type flash chips, which have several smaller 2049c609719bSwdenk sectors at the start or the end. For instance, such a 2050c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 2051c609719bSwdenk such a case you would place the environment in one of the 2052c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 2053c609719bSwdenk "top boot sector" type flash chips, you would put the 2054c609719bSwdenk environment in one of the last sectors, leaving a gap 2055c609719bSwdenk between U-Boot and the environment. 2056c609719bSwdenk 2057c609719bSwdenk - CFG_ENV_OFFSET: 2058c609719bSwdenk 2059c609719bSwdenk Offset of environment data (variable area) to the 2060c609719bSwdenk beginning of flash memory; for instance, with bottom boot 2061c609719bSwdenk type flash chips the second sector can be used: the offset 2062c609719bSwdenk for this sector is given here. 2063c609719bSwdenk 2064c609719bSwdenk CFG_ENV_OFFSET is used relative to CFG_FLASH_BASE. 2065c609719bSwdenk 2066c609719bSwdenk - CFG_ENV_ADDR: 2067c609719bSwdenk 2068c609719bSwdenk This is just another way to specify the start address of 2069c609719bSwdenk the flash sector containing the environment (instead of 2070c609719bSwdenk CFG_ENV_OFFSET). 2071c609719bSwdenk 2072c609719bSwdenk - CFG_ENV_SECT_SIZE: 2073c609719bSwdenk 2074c609719bSwdenk Size of the sector containing the environment. 2075c609719bSwdenk 2076c609719bSwdenk 2077c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 2078c609719bSwdenk In such a case you don't want to spend a whole sector for 2079c609719bSwdenk the environment. 2080c609719bSwdenk 2081c609719bSwdenk - CFG_ENV_SIZE: 2082c609719bSwdenk 2083c609719bSwdenk If you use this in combination with CFG_ENV_IS_IN_FLASH 2084c609719bSwdenk and CFG_ENV_SECT_SIZE, you can specify to use only a part 2085c609719bSwdenk of this flash sector for the environment. This saves 2086c609719bSwdenk memory for the RAM copy of the environment. 2087c609719bSwdenk 2088c609719bSwdenk It may also save flash memory if you decide to use this 2089c609719bSwdenk when your environment is "embedded" within U-Boot code, 2090c609719bSwdenk since then the remainder of the flash sector could be used 2091c609719bSwdenk for U-Boot code. It should be pointed out that this is 2092c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 2093c609719bSwdenk updating the environment in flash makes it always 2094c609719bSwdenk necessary to erase the WHOLE sector. If something goes 2095c609719bSwdenk wrong before the contents has been restored from a copy in 2096c609719bSwdenk RAM, your target system will be dead. 2097c609719bSwdenk 2098c609719bSwdenk - CFG_ENV_ADDR_REDUND 2099c609719bSwdenk CFG_ENV_SIZE_REDUND 2100c609719bSwdenk 2101c609719bSwdenk These settings describe a second storage area used to hold 2102c609719bSwdenk a redundand copy of the environment data, so that there is 21033e38691eSwdenk a valid backup copy in case there is a power failure during 2104c609719bSwdenk a "saveenv" operation. 2105c609719bSwdenk 2106c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2107c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2108c609719bSwdenkaccordingly! 2109c609719bSwdenk 2110c609719bSwdenk 2111c609719bSwdenk- CFG_ENV_IS_IN_NVRAM: 2112c609719bSwdenk 2113c609719bSwdenk Define this if you have some non-volatile memory device 2114c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2115c609719bSwdenk environment. 2116c609719bSwdenk 2117c609719bSwdenk - CFG_ENV_ADDR: 2118c609719bSwdenk - CFG_ENV_SIZE: 2119c609719bSwdenk 2120c609719bSwdenk These two #defines are used to determin the memory area you 2121c609719bSwdenk want to use for environment. It is assumed that this memory 2122c609719bSwdenk can just be read and written to, without any special 2123c609719bSwdenk provision. 2124c609719bSwdenk 2125c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2126c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 2127c609719bSwdenkconsole baudrate). You *MUST* have mappend your NVRAM area then, or 2128c609719bSwdenkU-Boot will hang. 2129c609719bSwdenk 2130c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2131c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2132c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2133c609719bSwdenkto save the current settings. 2134c609719bSwdenk 2135c609719bSwdenk 2136c609719bSwdenk- CFG_ENV_IS_IN_EEPROM: 2137c609719bSwdenk 2138c609719bSwdenk Use this if you have an EEPROM or similar serial access 2139c609719bSwdenk device and a driver for it. 2140c609719bSwdenk 2141c609719bSwdenk - CFG_ENV_OFFSET: 2142c609719bSwdenk - CFG_ENV_SIZE: 2143c609719bSwdenk 2144c609719bSwdenk These two #defines specify the offset and size of the 2145c609719bSwdenk environment area within the total memory of your EEPROM. 2146c609719bSwdenk 2147c609719bSwdenk - CFG_I2C_EEPROM_ADDR: 2148c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2149c609719bSwdenk The default address is zero. 2150c609719bSwdenk 2151c609719bSwdenk - CFG_EEPROM_PAGE_WRITE_BITS: 2152c609719bSwdenk If defined, the number of bits used to address bytes in a 2153c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2154c609719bSwdenk would require six bits. 2155c609719bSwdenk 2156c609719bSwdenk - CFG_EEPROM_PAGE_WRITE_DELAY_MS: 2157c609719bSwdenk If defined, the number of milliseconds to delay between 2158c609719bSwdenk page writes. The default is zero milliseconds. 2159c609719bSwdenk 2160c609719bSwdenk - CFG_I2C_EEPROM_ADDR_LEN: 2161c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2162c609719bSwdenk that this is NOT the chip address length! 2163c609719bSwdenk 21645cf91d6bSwdenk - CFG_I2C_EEPROM_ADDR_OVERFLOW: 21655cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 21665cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 21675cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 21685cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 21695cf91d6bSwdenk byte chips. 21705cf91d6bSwdenk 21715cf91d6bSwdenk Note that we consider the length of the address field to 21725cf91d6bSwdenk still be one byte because the extra address bits are hidden 21735cf91d6bSwdenk in the chip address. 21745cf91d6bSwdenk 2175c609719bSwdenk - CFG_EEPROM_SIZE: 2176c609719bSwdenk The size in bytes of the EEPROM device. 2177c609719bSwdenk 2178c609719bSwdenk 21795779d8d9Swdenk- CFG_ENV_IS_IN_DATAFLASH: 21805779d8d9Swdenk 21815779d8d9Swdenk Define this if you have a DataFlash memory device which you 21825779d8d9Swdenk want to use for the environment. 21835779d8d9Swdenk 21845779d8d9Swdenk - CFG_ENV_OFFSET: 21855779d8d9Swdenk - CFG_ENV_ADDR: 21865779d8d9Swdenk - CFG_ENV_SIZE: 21875779d8d9Swdenk 21885779d8d9Swdenk These three #defines specify the offset and size of the 21895779d8d9Swdenk environment area within the total memory of your DataFlash placed 21905779d8d9Swdenk at the specified address. 21915779d8d9Swdenk 219213a5695bSwdenk- CFG_ENV_IS_IN_NAND: 219313a5695bSwdenk 219413a5695bSwdenk Define this if you have a NAND device which you want to use 219513a5695bSwdenk for the environment. 219613a5695bSwdenk 219713a5695bSwdenk - CFG_ENV_OFFSET: 219813a5695bSwdenk - CFG_ENV_SIZE: 219913a5695bSwdenk 220013a5695bSwdenk These two #defines specify the offset and size of the environment 220113a5695bSwdenk area within the first NAND device. 22025779d8d9Swdenk 2203e443c944SMarkus Klotzbuecher - CFG_ENV_OFFSET_REDUND 2204e443c944SMarkus Klotzbuecher 2205e443c944SMarkus Klotzbuecher This setting describes a second storage area of CFG_ENV_SIZE 2206e443c944SMarkus Klotzbuecher size used to hold a redundant copy of the environment data, 2207e443c944SMarkus Klotzbuecher so that there is a valid backup copy in case there is a 2208e443c944SMarkus Klotzbuecher power failure during a "saveenv" operation. 2209e443c944SMarkus Klotzbuecher 2210e443c944SMarkus Klotzbuecher Note: CFG_ENV_OFFSET and CFG_ENV_OFFSET_REDUND must be aligned 2211e443c944SMarkus Klotzbuecher to a block boundary, and CFG_ENV_SIZE must be a multiple of 2212e443c944SMarkus Klotzbuecher the NAND devices block size. 2213e443c944SMarkus Klotzbuecher 2214c609719bSwdenk- CFG_SPI_INIT_OFFSET 2215c609719bSwdenk 2216c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2217c609719bSwdenk area is used at an early stage (ROM part) if the environment 2218c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2219c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2220c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2221c609719bSwdenk to be a good choice since it makes it far enough from the 2222c609719bSwdenk start of the data area as well as from the stack pointer. 2223c609719bSwdenk 2224e881cb56SBruce AdlerPlease note that the environment is read-only until the monitor 2225c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2226c609719bSwdenkcreated; also, when using EEPROM you will have to use getenv_r() 2227c609719bSwdenkuntil then to read environment variables. 2228c609719bSwdenk 222985ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 223085ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 223185ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 223285ec0bccSwdenknecessary, because the first environment variable we need is the 223385ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 223485ec0bccSwdenkhave any device yet where we could complain.] 2235c609719bSwdenk 2236c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2237c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 223885ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2239c609719bSwdenk 2240fc3e2165Swdenk- CFG_FAULT_ECHO_LINK_DOWN: 2241fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2242fc3e2165Swdenk 2243fc3e2165Swdenk Note: If this option is active, then CFG_FAULT_MII_ADDR 2244fc3e2165Swdenk also needs to be defined. 2245fc3e2165Swdenk 2246fc3e2165Swdenk- CFG_FAULT_MII_ADDR: 2247fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2248c609719bSwdenk 2249c40b2956Swdenk- CFG_64BIT_VSPRINTF: 2250c40b2956Swdenk Makes vsprintf (and all *printf functions) support printing 2251c40b2956Swdenk of 64bit values by using the L quantifier 2252c40b2956Swdenk 2253c40b2956Swdenk- CFG_64BIT_STRTOUL: 2254c40b2956Swdenk Adds simple_strtoull that returns a 64bit value 2255c40b2956Swdenk 2256c609719bSwdenkLow Level (hardware related) configuration options: 2257dc7c9a1aSwdenk--------------------------------------------------- 2258c609719bSwdenk 2259c609719bSwdenk- CFG_CACHELINE_SIZE: 2260c609719bSwdenk Cache Line Size of the CPU. 2261c609719bSwdenk 2262c609719bSwdenk- CFG_DEFAULT_IMMR: 2263c609719bSwdenk Default address of the IMMR after system reset. 22642535d602Swdenk 22652535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 22662535d602Swdenk and RPXsuper) to be able to adjust the position of 22672535d602Swdenk the IMMR register after a reset. 2268c609719bSwdenk 22697f6c2cbcSwdenk- Floppy Disk Support: 22707f6c2cbcSwdenk CFG_FDC_DRIVE_NUMBER 22717f6c2cbcSwdenk 22727f6c2cbcSwdenk the default drive number (default value 0) 22737f6c2cbcSwdenk 22747f6c2cbcSwdenk CFG_ISA_IO_STRIDE 22757f6c2cbcSwdenk 22767f6c2cbcSwdenk defines the spacing between fdc chipset registers 22777f6c2cbcSwdenk (default value 1) 22787f6c2cbcSwdenk 22797f6c2cbcSwdenk CFG_ISA_IO_OFFSET 22807f6c2cbcSwdenk 22817f6c2cbcSwdenk defines the offset of register from address. It 22827f6c2cbcSwdenk depends on which part of the data bus is connected to 22837f6c2cbcSwdenk the fdc chipset. (default value 0) 22847f6c2cbcSwdenk 22857f6c2cbcSwdenk If CFG_ISA_IO_STRIDE CFG_ISA_IO_OFFSET and 22867f6c2cbcSwdenk CFG_FDC_DRIVE_NUMBER are undefined, they take their 22877f6c2cbcSwdenk default value. 22887f6c2cbcSwdenk 22897f6c2cbcSwdenk if CFG_FDC_HW_INIT is defined, then the function 22907f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 22917f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 22927f6c2cbcSwdenk source code. It is used to make hardware dependant 22937f6c2cbcSwdenk initializations. 22947f6c2cbcSwdenk 229525d6712aSwdenk- CFG_IMMR: Physical address of the Internal Memory. 229625d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 229725d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2298c609719bSwdenk 2299c609719bSwdenk- CFG_INIT_RAM_ADDR: 2300c609719bSwdenk 23017152b1d0Swdenk Start address of memory area that can be used for 2302c609719bSwdenk initial data and stack; please note that this must be 2303c609719bSwdenk writable memory that is working WITHOUT special 2304c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2305c609719bSwdenk will become available only after programming the 2306c609719bSwdenk memory controller and running certain initialization 2307c609719bSwdenk sequences. 2308c609719bSwdenk 2309c609719bSwdenk U-Boot uses the following memory types: 2310c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2311c609719bSwdenk - MPC824X: data cache 2312c609719bSwdenk - PPC4xx: data cache 2313c609719bSwdenk 231485ec0bccSwdenk- CFG_GBL_DATA_OFFSET: 2315c609719bSwdenk 2316c609719bSwdenk Offset of the initial data structure in the memory 2317c609719bSwdenk area defined by CFG_INIT_RAM_ADDR. Usually 231885ec0bccSwdenk CFG_GBL_DATA_OFFSET is chosen such that the initial 2319c609719bSwdenk data is located at the end of the available space 2320c609719bSwdenk (sometimes written as (CFG_INIT_RAM_END - 2321c609719bSwdenk CFG_INIT_DATA_SIZE), and the initial stack is just 2322c609719bSwdenk below that area (growing from (CFG_INIT_RAM_ADDR + 232385ec0bccSwdenk CFG_GBL_DATA_OFFSET) downward. 2324c609719bSwdenk 2325c609719bSwdenk Note: 2326c609719bSwdenk On the MPC824X (or other systems that use the data 2327c609719bSwdenk cache for initial memory) the address chosen for 2328c609719bSwdenk CFG_INIT_RAM_ADDR is basically arbitrary - it must 2329c609719bSwdenk point to an otherwise UNUSED address space between 2330c609719bSwdenk the top of RAM and the start of the PCI space. 2331c609719bSwdenk 2332c609719bSwdenk- CFG_SIUMCR: SIU Module Configuration (11-6) 2333c609719bSwdenk 2334c609719bSwdenk- CFG_SYPCR: System Protection Control (11-9) 2335c609719bSwdenk 2336c609719bSwdenk- CFG_TBSCR: Time Base Status and Control (11-26) 2337c609719bSwdenk 2338c609719bSwdenk- CFG_PISCR: Periodic Interrupt Status and Control (11-31) 2339c609719bSwdenk 2340c609719bSwdenk- CFG_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 2341c609719bSwdenk 2342c609719bSwdenk- CFG_SCCR: System Clock and reset Control Register (15-27) 2343c609719bSwdenk 2344c609719bSwdenk- CFG_OR_TIMING_SDRAM: 2345c609719bSwdenk SDRAM timing 2346c609719bSwdenk 2347c609719bSwdenk- CFG_MAMR_PTA: 2348c609719bSwdenk periodic timer for refresh 2349c609719bSwdenk 2350c609719bSwdenk- CFG_DER: Debug Event Register (37-47) 2351c609719bSwdenk 2352c609719bSwdenk- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CFG_REMAP_OR_AM, 2353c609719bSwdenk CFG_PRELIM_OR_AM, CFG_OR_TIMING_FLASH, CFG_OR0_REMAP, 2354c609719bSwdenk CFG_OR0_PRELIM, CFG_BR0_PRELIM, CFG_OR1_REMAP, CFG_OR1_PRELIM, 2355c609719bSwdenk CFG_BR1_PRELIM: 2356c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 2357c609719bSwdenk 2358c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 2359c609719bSwdenk CFG_OR_TIMING_SDRAM, CFG_OR2_PRELIM, CFG_BR2_PRELIM, 2360c609719bSwdenk CFG_OR3_PRELIM, CFG_BR3_PRELIM: 2361c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 2362c609719bSwdenk 2363c609719bSwdenk- CFG_MAMR_PTA, CFG_MPTPR_2BK_4K, CFG_MPTPR_1BK_4K, CFG_MPTPR_2BK_8K, 2364c609719bSwdenk CFG_MPTPR_1BK_8K, CFG_MAMR_8COL, CFG_MAMR_9COL: 2365c609719bSwdenk Machine Mode Register and Memory Periodic Timer 2366c609719bSwdenk Prescaler definitions (SDRAM timing) 2367c609719bSwdenk 2368c609719bSwdenk- CFG_I2C_UCODE_PATCH, CFG_I2C_DPMEM_OFFSET [0x1FC0]: 2369c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 2370c609719bSwdenk define relocation offset in DPRAM [DSP2] 2371c609719bSwdenk 2372b423d055SHeiko Schocher- CFG_SMC_UCODE_PATCH, CFG_SMC_DPMEM_OFFSET [0x1FC0]: 2373b423d055SHeiko Schocher enable SMC microcode relocation patch (MPC8xx); 2374b423d055SHeiko Schocher define relocation offset in DPRAM [SMC1] 2375b423d055SHeiko Schocher 2376c609719bSwdenk- CFG_SPI_UCODE_PATCH, CFG_SPI_DPMEM_OFFSET [0x1FC0]: 2377c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 2378c609719bSwdenk define relocation offset in DPRAM [SCC4] 2379c609719bSwdenk 2380c609719bSwdenk- CFG_USE_OSCCLK: 2381c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 2382c609719bSwdenk wrong setting might damage your board. Read 2383c609719bSwdenk doc/README.MBX before setting this variable! 2384c609719bSwdenk 2385ea909b76Swdenk- CFG_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 2386ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 2387ea909b76Swdenk (Power On Self Tests). This definition overrides 2388ea909b76Swdenk #define'd default value in commproc.h resp. 2389ea909b76Swdenk cpm_8260.h. 2390ea909b76Swdenk 23915d232d0eSwdenk- CFG_PCI_SLV_MEM_LOCAL, CFG_PCI_SLV_MEM_BUS, CFG_PICMR0_MASK_ATTRIB, 23925d232d0eSwdenk CFG_PCI_MSTR0_LOCAL, CFG_PCIMSK0_MASK, CFG_PCI_MSTR1_LOCAL, 23935d232d0eSwdenk CFG_PCIMSK1_MASK, CFG_PCI_MSTR_MEM_LOCAL, CFG_PCI_MSTR_MEM_BUS, 23945d232d0eSwdenk CFG_CPU_PCI_MEM_START, CFG_PCI_MSTR_MEM_SIZE, CFG_POCMR0_MASK_ATTRIB, 23955d232d0eSwdenk CFG_PCI_MSTR_MEMIO_LOCAL, CFG_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 23965d232d0eSwdenk CFG_PCI_MSTR_MEMIO_SIZE, CFG_POCMR1_MASK_ATTRIB, CFG_PCI_MSTR_IO_LOCAL, 23975d232d0eSwdenk CFG_PCI_MSTR_IO_BUS, CFG_CPU_PCI_IO_START, CFG_PCI_MSTR_IO_SIZE, 23985d232d0eSwdenk CFG_POCMR2_MASK_ATTRIB: (MPC826x only) 23995d232d0eSwdenk Overrides the default PCI memory map in cpu/mpc8260/pci.c if set. 24005d232d0eSwdenk 2401bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 2402218ca724SWolfgang Denk Get DDR timing information from an I2C EEPROM. Common 2403218ca724SWolfgang Denk with pluggable memory modules such as SODIMMs 2404218ca724SWolfgang Denk 2405bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 2406bb99ad6dSBen Warren I2C address of the SPD EEPROM 2407bb99ad6dSBen Warren 2408bb99ad6dSBen Warren- CFG_SPD_BUS_NUM 2409218ca724SWolfgang Denk If SPD EEPROM is on an I2C bus other than the first 2410218ca724SWolfgang Denk one, specify here. Note that the value must resolve 2411218ca724SWolfgang Denk to something your driver can deal with. 2412bb99ad6dSBen Warren 24132ad6b513STimur Tabi- CFG_83XX_DDR_USES_CS0 2414218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 2415218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 24162ad6b513STimur Tabi 24172ad6b513STimur Tabi- CFG_83XX_DDR_USES_CS0 2418218ca724SWolfgang Denk Only for 83xx systems. If specified, then DDR should 2419218ca724SWolfgang Denk be configured using CS0 and CS1 instead of CS2 and CS3. 24202ad6b513STimur Tabi 2421c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 2422c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 2423c26e454dSwdenk 2424c26e454dSwdenk- CONFIG_FEC[12]_PHY 2425c26e454dSwdenk Define to the hardcoded PHY address which corresponds 24266e592385Swdenk to the given FEC; i. e. 2427c26e454dSwdenk #define CONFIG_FEC1_PHY 4 2428c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 2429c26e454dSwdenk 2430c26e454dSwdenk When set to -1, means to probe for first available. 2431c26e454dSwdenk 2432c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 2433c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 2434c26e454dSwdenk (so program the FEC to ignore it). 2435c26e454dSwdenk 2436c26e454dSwdenk- CONFIG_RMII 2437c26e454dSwdenk Enable RMII mode for all FECs. 2438c26e454dSwdenk Note that this is a global option, we can't 2439c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 2440c26e454dSwdenk 24415cf91d6bSwdenk- CONFIG_CRC32_VERIFY 24425cf91d6bSwdenk Add a verify option to the crc32 command. 24435cf91d6bSwdenk The syntax is: 24445cf91d6bSwdenk 24455cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 24465cf91d6bSwdenk 24475cf91d6bSwdenk Where address/count indicate a memory area 24485cf91d6bSwdenk and crc32 is the correct crc32 which the 24495cf91d6bSwdenk area should have. 24505cf91d6bSwdenk 245156523f12Swdenk- CONFIG_LOOPW 245256523f12Swdenk Add the "loopw" memory command. This only takes effect if 2453602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 245456523f12Swdenk 24557b466641Sstroese- CONFIG_MX_CYCLIC 24567b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 24577b466641Sstroese "md/mw" commands. 24587b466641Sstroese Examples: 24597b466641Sstroese 24607b466641Sstroese => mdc.b 10 4 500 24617b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 24627b466641Sstroese 24637b466641Sstroese => mwc.l 100 12345678 10 24647b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 24657b466641Sstroese 24667b466641Sstroese This only takes effect if the memory commands are activated 2467602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 24687b466641Sstroese 24698aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 24708aa1a2d1Swdenk- CONFIG_SKIP_RELOCATE_UBOOT 24718aa1a2d1Swdenk 24728aa1a2d1Swdenk [ARM only] If these variables are defined, then 24738aa1a2d1Swdenk certain low level initializations (like setting up 24748aa1a2d1Swdenk the memory controller) are omitted and/or U-Boot does 24758aa1a2d1Swdenk not relocate itself into RAM. 24768aa1a2d1Swdenk Normally these variables MUST NOT be defined. The 24778aa1a2d1Swdenk only exception is when U-Boot is loaded (to RAM) by 24788aa1a2d1Swdenk some other boot loader or by a debugger which 24798aa1a2d1Swdenk performs these intializations itself. 24808aa1a2d1Swdenk 2481400558b5Swdenk 2482c609719bSwdenkBuilding the Software: 2483c609719bSwdenk====================== 2484c609719bSwdenk 2485218ca724SWolfgang DenkBuilding U-Boot has been tested in several native build environments 2486218ca724SWolfgang Denkand in many different cross environments. Of course we cannot support 2487218ca724SWolfgang Denkall possibly existing versions of cross development tools in all 2488218ca724SWolfgang Denk(potentially obsolete) versions. In case of tool chain problems we 2489218ca724SWolfgang Denkrecommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) 2490218ca724SWolfgang Denkwhich is extensively used to build and test U-Boot. 2491c609719bSwdenk 2492218ca724SWolfgang DenkIf you are not using a native environment, it is assumed that you 2493218ca724SWolfgang Denkhave GNU cross compiling tools available in your path. In this case, 2494218ca724SWolfgang Denkyou must set the environment variable CROSS_COMPILE in your shell. 2495218ca724SWolfgang DenkNote that no changes to the Makefile or any other source files are 2496218ca724SWolfgang Denknecessary. For example using the ELDK on a 4xx CPU, please enter: 2497c609719bSwdenk 2498218ca724SWolfgang Denk $ CROSS_COMPILE=ppc_4xx- 2499218ca724SWolfgang Denk $ export CROSS_COMPILE 2500c609719bSwdenk 2501c609719bSwdenkU-Boot is intended to be simple to build. After installing the 2502c609719bSwdenksources you must configure U-Boot for one specific board type. This 2503c609719bSwdenkis done by typing: 2504c609719bSwdenk 2505c609719bSwdenk make NAME_config 2506c609719bSwdenk 2507218ca724SWolfgang Denkwhere "NAME_config" is the name of one of the existing configu- 2508218ca724SWolfgang Denkrations; see the main Makefile for supported names. 250954387ac9Swdenk 2510c609719bSwdenkNote: for some board special configuration names may exist; check if 2511c609719bSwdenk additional information is available from the board vendor; for 25122729af9dSwdenk instance, the TQM823L systems are available without (standard) 25132729af9dSwdenk or with LCD support. You can select such additional "features" 2514c609719bSwdenk when chosing the configuration, i. e. 2515c609719bSwdenk 25162729af9dSwdenk make TQM823L_config 25172729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 2518c609719bSwdenk 2519c609719bSwdenk make TQM823L_LCD_config 2520c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 2521c609719bSwdenk 2522c609719bSwdenk etc. 2523c609719bSwdenk 2524c609719bSwdenk 2525c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 25267152b1d0Swdenkimages ready for download to / installation on your system: 2527c609719bSwdenk 2528c609719bSwdenk- "u-boot.bin" is a raw binary image 2529c609719bSwdenk- "u-boot" is an image in ELF binary format 2530c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 2531c609719bSwdenk 2532baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 2533baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 2534baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 2535baf31249SMarian Balakowicz 2536baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 2537baf31249SMarian Balakowicz 2538baf31249SMarian Balakowicz make O=/tmp/build distclean 2539baf31249SMarian Balakowicz make O=/tmp/build NAME_config 2540baf31249SMarian Balakowicz make O=/tmp/build all 2541baf31249SMarian Balakowicz 2542baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 2543baf31249SMarian Balakowicz 2544baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2545baf31249SMarian Balakowicz make distclean 2546baf31249SMarian Balakowicz make NAME_config 2547baf31249SMarian Balakowicz make all 2548baf31249SMarian Balakowicz 2549baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 2550baf31249SMarian Balakowiczvariable. 2551baf31249SMarian Balakowicz 2552c609719bSwdenk 2553c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 2554c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 2555c609719bSwdenknative "make". 2556c609719bSwdenk 2557c609719bSwdenk 2558c609719bSwdenkIf the system board that you have is not listed, then you will need 2559c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 2560c609719bSwdenksteps: 2561c609719bSwdenk 2562c609719bSwdenk1. Add a new configuration option for your board to the toplevel 256385ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 256485ec0bccSwdenk entries as examples. Note that here and at many other places 25657152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 256685ec0bccSwdenk keep this order. 2567c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 256885ec0bccSwdenk files you need. In your board directory, you will need at least 256985ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 257085ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 257185ec0bccSwdenk your board 2572c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 2573c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 257485ec0bccSwdenk4. Run "make <board>_config" with your new name. 2575c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 2576c609719bSwdenk to be installed on your target system. 257785ec0bccSwdenk6. Debug and solve any problems that might arise. 2578c609719bSwdenk [Of course, this last step is much harder than it sounds.] 2579c609719bSwdenk 2580c609719bSwdenk 2581c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 2582c609719bSwdenk============================================================== 2583c609719bSwdenk 2584c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 2585c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 2586c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 2587c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 2588218ca724SWolfgang Denkofficial or latest in the git repository) version of U-Boot sources. 2589c609719bSwdenk 2590c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 2591c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 2592c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 2593c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 2594c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 25957152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 2596218ca724SWolfgang Denkenvironment variable to the script, i. e. to use the ELDK cross tools 2597218ca724SWolfgang Denkyou can type 2598c609719bSwdenk 2599c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 2600c609719bSwdenk 2601c609719bSwdenkor to build on a native PowerPC system you can type 2602c609719bSwdenk 2603c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 2604c609719bSwdenk 2605218ca724SWolfgang DenkWhen using the MAKEALL script, the default behaviour is to build 2606218ca724SWolfgang DenkU-Boot in the source directory. This location can be changed by 2607218ca724SWolfgang Denksetting the BUILD_DIR environment variable. Also, for each target 2608218ca724SWolfgang Denkbuilt, the MAKEALL script saves two log files (<target>.ERR and 2609218ca724SWolfgang Denk<target>.MAKEALL) in the <source dir>/LOG directory. This default 2610218ca724SWolfgang Denklocation can be changed by setting the MAKEALL_LOGDIR environment 2611218ca724SWolfgang Denkvariable. For example: 2612baf31249SMarian Balakowicz 2613baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2614baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 2615baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 2616baf31249SMarian Balakowicz 2617218ca724SWolfgang DenkWith the above settings build objects are saved in the /tmp/build, 2618218ca724SWolfgang Denklog files are saved in the /tmp/log and the source tree remains clean 2619218ca724SWolfgang Denkduring the whole build process. 2620baf31249SMarian Balakowicz 2621baf31249SMarian Balakowicz 2622c609719bSwdenkSee also "U-Boot Porting Guide" below. 2623c609719bSwdenk 2624c609719bSwdenk 2625c609719bSwdenkMonitor Commands - Overview: 2626c609719bSwdenk============================ 2627c609719bSwdenk 2628c609719bSwdenkgo - start application at address 'addr' 2629c609719bSwdenkrun - run commands in an environment variable 2630c609719bSwdenkbootm - boot application image from memory 2631c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 2632c609719bSwdenktftpboot- boot image via network using TFTP protocol 2633c609719bSwdenk and env variables "ipaddr" and "serverip" 2634c609719bSwdenk (and eventually "gatewayip") 2635c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 2636c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 2637c609719bSwdenkloads - load S-Record file over serial line 2638c609719bSwdenkloadb - load binary file over serial line (kermit mode) 2639c609719bSwdenkmd - memory display 2640c609719bSwdenkmm - memory modify (auto-incrementing) 2641c609719bSwdenknm - memory modify (constant address) 2642c609719bSwdenkmw - memory write (fill) 2643c609719bSwdenkcp - memory copy 2644c609719bSwdenkcmp - memory compare 2645c609719bSwdenkcrc32 - checksum calculation 2646c609719bSwdenkimd - i2c memory display 2647c609719bSwdenkimm - i2c memory modify (auto-incrementing) 2648c609719bSwdenkinm - i2c memory modify (constant address) 2649c609719bSwdenkimw - i2c memory write (fill) 2650c609719bSwdenkicrc32 - i2c checksum calculation 2651c609719bSwdenkiprobe - probe to discover valid I2C chip addresses 2652c609719bSwdenkiloop - infinite loop on address range 2653c609719bSwdenkisdram - print SDRAM configuration information 2654c609719bSwdenksspi - SPI utility commands 2655c609719bSwdenkbase - print or set address offset 2656c609719bSwdenkprintenv- print environment variables 2657c609719bSwdenksetenv - set environment variables 2658c609719bSwdenksaveenv - save environment variables to persistent storage 2659c609719bSwdenkprotect - enable or disable FLASH write protection 2660c609719bSwdenkerase - erase FLASH memory 2661c609719bSwdenkflinfo - print FLASH memory information 2662c609719bSwdenkbdinfo - print Board Info structure 2663c609719bSwdenkiminfo - print header information for application image 2664c609719bSwdenkconinfo - print console devices and informations 2665c609719bSwdenkide - IDE sub-system 2666c609719bSwdenkloop - infinite loop on address range 266756523f12Swdenkloopw - infinite write loop on address range 2668c609719bSwdenkmtest - simple RAM test 2669c609719bSwdenkicache - enable or disable instruction cache 2670c609719bSwdenkdcache - enable or disable data cache 2671c609719bSwdenkreset - Perform RESET of the CPU 2672c609719bSwdenkecho - echo args to console 2673c609719bSwdenkversion - print monitor version 2674c609719bSwdenkhelp - print online help 2675c609719bSwdenk? - alias for 'help' 2676c609719bSwdenk 2677c609719bSwdenk 2678c609719bSwdenkMonitor Commands - Detailed Description: 2679c609719bSwdenk======================================== 2680c609719bSwdenk 2681c609719bSwdenkTODO. 2682c609719bSwdenk 2683c609719bSwdenkFor now: just type "help <command>". 2684c609719bSwdenk 2685c609719bSwdenk 2686c609719bSwdenkEnvironment Variables: 2687c609719bSwdenk====================== 2688c609719bSwdenk 2689c609719bSwdenkU-Boot supports user configuration using Environment Variables which 2690c609719bSwdenkcan be made persistent by saving to Flash memory. 2691c609719bSwdenk 2692c609719bSwdenkEnvironment Variables are set using "setenv", printed using 2693c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 2694c609719bSwdenkwithout a value can be used to delete a variable from the 2695c609719bSwdenkenvironment. As long as you don't save the environment you are 2696c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 2697c609719bSwdenkenvironment is erased by accident, a default environment is provided. 2698c609719bSwdenk 2699c609719bSwdenkSome configuration options can be set using Environment Variables: 2700c609719bSwdenk 2701c609719bSwdenk baudrate - see CONFIG_BAUDRATE 2702c609719bSwdenk 2703c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 2704c609719bSwdenk 2705c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 2706c609719bSwdenk 2707c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 2708c609719bSwdenk 2709c609719bSwdenk bootfile - Name of the image to load with TFTP 2710c609719bSwdenk 2711c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 2712c609719bSwdenk "bootp" will just load perform a lookup of the 2713c609719bSwdenk configuration from the BOOTP server, but not try to 2714c609719bSwdenk load any image using TFTP 2715c609719bSwdenk 27163310c549SMarian Balakowicz autoscript - if set to "yes" commands like "loadb", "loady", 27173310c549SMarian Balakowicz "bootp", "tftpb", "rarpboot" and "nfs" will attempt 27183310c549SMarian Balakowicz to automatically run script images (by internally 27193310c549SMarian Balakowicz calling "autoscript"). 27203310c549SMarian Balakowicz 27213310c549SMarian Balakowicz autoscript_uname - if script image is in a format (FIT) this 27223310c549SMarian Balakowicz variable is used to get script subimage unit name. 27233310c549SMarian Balakowicz 2724c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 2725c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 2726c609719bSwdenk be automatically started (by internally calling 2727c609719bSwdenk "bootm") 2728c609719bSwdenk 27294a6fd34bSwdenk If set to "no", a standalone image passed to the 27304a6fd34bSwdenk "bootm" command will be copied to the load address 27314a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 27324a6fd34bSwdenk This can be used to load and uncompress arbitrary 27334a6fd34bSwdenk data. 27344a6fd34bSwdenk 273517ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 273617ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 273717ea1177Swdenk mode (400kHZ). This environment variable is used in 273817ea1177Swdenk initialization code. So, for changes to be effective 273917ea1177Swdenk it must be saved and board must be reset. 274017ea1177Swdenk 2741c609719bSwdenk initrd_high - restrict positioning of initrd images: 2742c609719bSwdenk If this variable is not set, initrd images will be 2743c609719bSwdenk copied to the highest possible address in RAM; this 2744c609719bSwdenk is usually what you want since it allows for 2745c609719bSwdenk maximum initrd size. If for some reason you want to 2746c609719bSwdenk make sure that the initrd image is loaded below the 2747c609719bSwdenk CFG_BOOTMAPSZ limit, you can set this environment 2748c609719bSwdenk variable to a value of "no" or "off" or "0". 2749c609719bSwdenk Alternatively, you can set it to a maximum upper 2750c609719bSwdenk address to use (U-Boot will still check that it 2751c609719bSwdenk does not overwrite the U-Boot stack and data). 2752c609719bSwdenk 2753c609719bSwdenk For instance, when you have a system with 16 MB 27547152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 2755c609719bSwdenk you can do this by adding "mem=12M" to the value of 2756c609719bSwdenk the "bootargs" variable. However, now you must make 27577152b1d0Swdenk sure that the initrd image is placed in the first 2758c609719bSwdenk 12 MB as well - this can be done with 2759c609719bSwdenk 2760c609719bSwdenk setenv initrd_high 00c00000 2761c609719bSwdenk 276238b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 276338b99261Swdenk indication to U-Boot that all addresses are legal 276438b99261Swdenk for the Linux kernel, including addresses in flash 276538b99261Swdenk memory. In this case U-Boot will NOT COPY the 276638b99261Swdenk ramdisk at all. This may be useful to reduce the 276738b99261Swdenk boot time on your system, but requires that this 276838b99261Swdenk feature is supported by your Linux kernel. 276938b99261Swdenk 2770c609719bSwdenk ipaddr - IP address; needed for tftpboot command 2771c609719bSwdenk 2772c609719bSwdenk loadaddr - Default load address for commands like "bootp", 2773dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 2774c609719bSwdenk 2775c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 2776c609719bSwdenk 2777c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 2778c609719bSwdenk 2779c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 2780c609719bSwdenk 2781c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 2782c609719bSwdenk 2783c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 2784c609719bSwdenk 2785a3d991bdSwdenk ethprime - When CONFIG_NET_MULTI is enabled controls which 2786a3d991bdSwdenk interface is used first. 2787a3d991bdSwdenk 2788a3d991bdSwdenk ethact - When CONFIG_NET_MULTI is enabled controls which 2789a3d991bdSwdenk interface is currently active. For example you 2790a3d991bdSwdenk can do the following 2791a3d991bdSwdenk 2792a3d991bdSwdenk => setenv ethact FEC ETHERNET 2793a3d991bdSwdenk => ping 192.168.0.1 # traffic sent on FEC ETHERNET 2794a3d991bdSwdenk => setenv ethact SCC ETHERNET 2795a3d991bdSwdenk => ping 10.0.0.1 # traffic sent on SCC ETHERNET 2796a3d991bdSwdenk 2797e1692577SMatthias Fuchs ethrotate - When set to "no" U-Boot does not go through all 2798e1692577SMatthias Fuchs available network interfaces. 2799e1692577SMatthias Fuchs It just stays at the currently selected interface. 2800e1692577SMatthias Fuchs 2801a3d991bdSwdenk netretry - When set to "no" each network operation will 2802a3d991bdSwdenk either succeed or fail without retrying. 28036e592385Swdenk When set to "once" the network operation will 28046e592385Swdenk fail when all the available network interfaces 28056e592385Swdenk are tried once without success. 2806a3d991bdSwdenk Useful on scripts which control the retry operation 2807a3d991bdSwdenk themselves. 2808a3d991bdSwdenk 2809a1cf027aSJean-Christophe PLAGNIOL-VILLARD npe_ucode - see CONFIG_IXP4XX_NPE_EXT_UCOD 2810a1cf027aSJean-Christophe PLAGNIOL-VILLARD if set load address for the npe microcode 2811a1cf027aSJean-Christophe PLAGNIOL-VILLARD 281228cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 2813ecb0ccd9SWolfgang Denk UDP source port. 2814ecb0ccd9SWolfgang Denk 281528cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 281628cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 281728cb9375SWolfgang Denk 2818a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 2819a3d991bdSwdenk ethernet is encapsulated/received over 802.1q 2820a3d991bdSwdenk VLAN tagged frames. 2821c609719bSwdenk 2822c609719bSwdenkThe following environment variables may be used and automatically 2823c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 2824c609719bSwdenkdepending the information provided by your boot server: 2825c609719bSwdenk 2826c609719bSwdenk bootfile - see above 2827c609719bSwdenk dnsip - IP address of your Domain Name Server 2828fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 2829c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 2830c609719bSwdenk hostname - Target hostname 2831c609719bSwdenk ipaddr - see above 2832c609719bSwdenk netmask - Subnet Mask 2833c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 2834c609719bSwdenk serverip - see above 2835c609719bSwdenk 2836c609719bSwdenk 2837c609719bSwdenkThere are two special Environment Variables: 2838c609719bSwdenk 2839c609719bSwdenk serial# - contains hardware identification information such 2840c609719bSwdenk as type string and/or serial number 2841c609719bSwdenk ethaddr - Ethernet address 2842c609719bSwdenk 2843c609719bSwdenkThese variables can be set only once (usually during manufacturing of 2844c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 2845c609719bSwdenkonce they have been set once. 2846c609719bSwdenk 2847c609719bSwdenk 2848c1551ea8SstroeseFurther special Environment Variables: 2849c1551ea8Sstroese 2850c1551ea8Sstroese ver - Contains the U-Boot version string as printed 2851c1551ea8Sstroese with the "version" command. This variable is 2852c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 2853c1551ea8Sstroese 2854c1551ea8Sstroese 2855c609719bSwdenkPlease note that changes to some configuration parameters may take 2856c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 2857c609719bSwdenk 2858c609719bSwdenk 2859f07771ccSwdenkCommand Line Parsing: 2860f07771ccSwdenk===================== 2861f07771ccSwdenk 2862f07771ccSwdenkThere are two different command line parsers available with U-Boot: 28637152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 2864f07771ccSwdenk 2865f07771ccSwdenkOld, simple command line parser: 2866f07771ccSwdenk-------------------------------- 2867f07771ccSwdenk 2868f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 2869f07771ccSwdenk- several commands on one line, separated by ';' 2870fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 2871f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 2872f07771ccSwdenk for example: 2873fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 2874f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 2875f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 2876f07771ccSwdenk 2877f07771ccSwdenkHush shell: 2878f07771ccSwdenk----------- 2879f07771ccSwdenk 2880f07771ccSwdenk- similar to Bourne shell, with control structures like 2881f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 2882f07771ccSwdenk until...do...done, ... 2883f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 2884f07771ccSwdenk commands) and local shell variables (through standard shell syntax 2885f07771ccSwdenk "name=value"); only environment variables can be used with "run" 2886f07771ccSwdenk command 2887f07771ccSwdenk 2888f07771ccSwdenkGeneral rules: 2889f07771ccSwdenk-------------- 2890f07771ccSwdenk 2891f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 2892f07771ccSwdenk command) contains several commands separated by semicolon, and 2893f07771ccSwdenk one of these commands fails, then the remaining commands will be 2894f07771ccSwdenk executed anyway. 2895f07771ccSwdenk 2896f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 2897f07771ccSwdenk calling run with a list af variables as arguments), any failing 2898f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 2899f07771ccSwdenk variables are not executed. 2900f07771ccSwdenk 2901c609719bSwdenkNote for Redundant Ethernet Interfaces: 2902c609719bSwdenk======================================= 2903c609719bSwdenk 29047152b1d0SwdenkSome boards come with redundant ethernet interfaces; U-Boot supports 2905c609719bSwdenksuch configurations and is capable of automatic selection of a 29067152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 2907c609719bSwdenk 2908c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 2909c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 2910c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 2911c609719bSwdenk 2912c609719bSwdenkIf the network interface stores some valid MAC address (for instance 2913c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 2914c609719bSwdenkding setting in the environment; if the corresponding environment 2915c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 2916c609719bSwdenk 2917c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 2918c609719bSwdenk environment, the SROM's address is used. 2919c609719bSwdenk 2920c609719bSwdenko If there is no valid address in the SROM, and a definition in the 2921c609719bSwdenk environment exists, then the value from the environment variable is 2922c609719bSwdenk used. 2923c609719bSwdenk 2924c609719bSwdenko If both the SROM and the environment contain a MAC address, and 2925c609719bSwdenk both addresses are the same, this MAC address is used. 2926c609719bSwdenk 2927c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 2928c609719bSwdenk addresses differ, the value from the environment is used and a 2929c609719bSwdenk warning is printed. 2930c609719bSwdenk 2931c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 2932c609719bSwdenk is raised. 2933c609719bSwdenk 2934c609719bSwdenk 2935c609719bSwdenkImage Formats: 2936c609719bSwdenk============== 2937c609719bSwdenk 29383310c549SMarian BalakowiczU-Boot is capable of booting (and performing other auxiliary operations on) 29393310c549SMarian Balakowiczimages in two formats: 29403310c549SMarian Balakowicz 29413310c549SMarian BalakowiczNew uImage format (FIT) 29423310c549SMarian Balakowicz----------------------- 29433310c549SMarian Balakowicz 29443310c549SMarian BalakowiczFlexible and powerful format based on Flattened Image Tree -- FIT (similar 29453310c549SMarian Balakowiczto Flattened Device Tree). It allows the use of images with multiple 29463310c549SMarian Balakowiczcomponents (several kernels, ramdisks, etc.), with contents protected by 29473310c549SMarian BalakowiczSHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. 29483310c549SMarian Balakowicz 29493310c549SMarian Balakowicz 29503310c549SMarian BalakowiczOld uImage format 29513310c549SMarian Balakowicz----------------- 29523310c549SMarian Balakowicz 29533310c549SMarian BalakowiczOld image format is based on binary files which can be basically anything, 29543310c549SMarian Balakowiczpreceded by a special header; see the definitions in include/image.h for 29553310c549SMarian Balakowiczdetails; basically, the header defines the following image properties: 2956c609719bSwdenk 2957c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 2958c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 29597f70e853Swdenk LynxOS, pSOS, QNX, RTEMS, ARTOS; 29601f4bb37dSwdenk Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, ARTOS, LynxOS). 29617b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 29623d1e8a9dSwdenk IA64, MIPS, NIOS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 29637b64fef3SWolfgang Denk Currently supported: ARM, AVR32, Intel x86, MIPS, NIOS, PowerPC). 2964c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 2965c609719bSwdenk* Load Address 2966c609719bSwdenk* Entry Point 2967c609719bSwdenk* Image Name 2968c609719bSwdenk* Image Timestamp 2969c609719bSwdenk 2970c609719bSwdenkThe header is marked by a special Magic Number, and both the header 2971c609719bSwdenkand the data portions of the image are secured against corruption by 2972c609719bSwdenkCRC32 checksums. 2973c609719bSwdenk 2974c609719bSwdenk 2975c609719bSwdenkLinux Support: 2976c609719bSwdenk============== 2977c609719bSwdenk 2978c609719bSwdenkAlthough U-Boot should support any OS or standalone application 29797152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 2980c609719bSwdenkU-Boot. 2981c609719bSwdenk 2982c609719bSwdenkU-Boot includes many features that so far have been part of some 2983c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 2984c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 2985c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 29867152b1d0Swdenkserves several purposes: 2987c609719bSwdenk 2988c609719bSwdenk- the same features can be used for other OS or standalone 2989c609719bSwdenk applications (for instance: using compressed images to reduce the 2990c609719bSwdenk Flash memory footprint) 2991c609719bSwdenk 2992c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 29937152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 2994c609719bSwdenk 2995c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 2996c609719bSwdenk images; of course this also means that different kernel images can 2997c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 2998c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 2999c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 3000c609719bSwdenk software is easier now. 3001c609719bSwdenk 3002c609719bSwdenk 3003c609719bSwdenkLinux HOWTO: 3004c609719bSwdenk============ 3005c609719bSwdenk 3006c609719bSwdenkPorting Linux to U-Boot based systems: 3007c609719bSwdenk--------------------------------------- 3008c609719bSwdenk 3009c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 3010c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 3011c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 3012c609719bSwdenkLinux :-). 3013c609719bSwdenk 3014c609719bSwdenkBut now you can ignore ALL boot loader code (in arch/ppc/mbxboot). 3015c609719bSwdenk 3016c609719bSwdenkJust make sure your machine specific header file (for instance 3017c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 3018c609719bSwdenkInformation structure as we define in include/u-boot.h, and make 3019c609719bSwdenksure that your definition of IMAP_ADDR uses the same value as your 3020c609719bSwdenkU-Boot configuration in CFG_IMMR. 3021c609719bSwdenk 3022c609719bSwdenk 3023c609719bSwdenkConfiguring the Linux kernel: 3024c609719bSwdenk----------------------------- 3025c609719bSwdenk 3026c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 3027c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 3028c609719bSwdenk 3029c609719bSwdenk 3030c609719bSwdenkBuilding a Linux Image: 3031c609719bSwdenk----------------------- 3032c609719bSwdenk 303324ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 303424ee89b9Swdenknot used. If you use recent kernel source, a new build target 303524ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 303624ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 303724ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 303824ee89b9Swdenk100% compatible format. 3039c609719bSwdenk 3040c609719bSwdenkExample: 3041c609719bSwdenk 3042c609719bSwdenk make TQM850L_config 3043c609719bSwdenk make oldconfig 3044c609719bSwdenk make dep 304524ee89b9Swdenk make uImage 3046c609719bSwdenk 304724ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 304824ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 304924ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 3050c609719bSwdenk 305124ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 305224ee89b9Swdenk 305324ee89b9Swdenk* convert the kernel into a raw binary image: 305424ee89b9Swdenk 305524ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 305624ee89b9Swdenk -R .note -R .comment \ 305724ee89b9Swdenk -S vmlinux linux.bin 305824ee89b9Swdenk 305924ee89b9Swdenk* compress the binary image: 306024ee89b9Swdenk 306124ee89b9Swdenk gzip -9 linux.bin 306224ee89b9Swdenk 306324ee89b9Swdenk* package compressed binary image for U-Boot: 306424ee89b9Swdenk 306524ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 306624ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 306724ee89b9Swdenk -d linux.bin.gz uImage 306824ee89b9Swdenk 306924ee89b9Swdenk 307024ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 307124ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 307224ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 307324ee89b9Swdenkbyte header containing information about target architecture, 307424ee89b9Swdenkoperating system, image type, compression method, entry points, time 307524ee89b9Swdenkstamp, CRC32 checksums, etc. 307624ee89b9Swdenk 307724ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 307824ee89b9Swdenkprint the header information, or to build new images. 3079c609719bSwdenk 3080c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 3081c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 3082c609719bSwdenkchecksum verification: 3083c609719bSwdenk 3084c609719bSwdenk tools/mkimage -l image 3085c609719bSwdenk -l ==> list image header information 3086c609719bSwdenk 3087c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 3088c609719bSwdenkfrom a "data file" which is used as image payload: 3089c609719bSwdenk 3090c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 3091c609719bSwdenk -n name -d data_file image 3092c609719bSwdenk -A ==> set architecture to 'arch' 3093c609719bSwdenk -O ==> set operating system to 'os' 3094c609719bSwdenk -T ==> set image type to 'type' 3095c609719bSwdenk -C ==> set compression type 'comp' 3096c609719bSwdenk -a ==> set load address to 'addr' (hex) 3097c609719bSwdenk -e ==> set entry point to 'ep' (hex) 3098c609719bSwdenk -n ==> set image name to 'name' 3099c609719bSwdenk -d ==> use image data from 'datafile' 3100c609719bSwdenk 310169459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 310269459791Swdenkaddress (0x00000000), but the entry point address depends on the 310369459791Swdenkkernel version: 3104c609719bSwdenk 3105c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 310624ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 3107c609719bSwdenk 3108c609719bSwdenkSo a typical call to build a U-Boot image would read: 3109c609719bSwdenk 311024ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 311124ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 311224ee89b9Swdenk > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux.gz \ 311324ee89b9Swdenk > examples/uImage.TQM850L 311424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3115c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3116c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3117c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3118c609719bSwdenk Load Address: 0x00000000 311924ee89b9Swdenk Entry Point: 0x00000000 3120c609719bSwdenk 3121c609719bSwdenkTo verify the contents of the image (or check for corruption): 3122c609719bSwdenk 312324ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 312424ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3125c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3126c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3127c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 3128c609719bSwdenk Load Address: 0x00000000 312924ee89b9Swdenk Entry Point: 0x00000000 3130c609719bSwdenk 3131c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 3132c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3133c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3134c609719bSwdenkneed to be uncompressed: 3135c609719bSwdenk 313624ee89b9Swdenk -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux.gz 313724ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 313824ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 313924ee89b9Swdenk > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux \ 314024ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 314124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3142c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3143c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3144c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3145c609719bSwdenk Load Address: 0x00000000 314624ee89b9Swdenk Entry Point: 0x00000000 3147c609719bSwdenk 3148c609719bSwdenk 3149c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3150c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3151c609719bSwdenk 3152c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3153c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3154c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3155c609719bSwdenk Image Name: Simple Ramdisk Image 3156c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3157c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3158c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3159c609719bSwdenk Load Address: 0x00000000 3160c609719bSwdenk Entry Point: 0x00000000 3161c609719bSwdenk 3162c609719bSwdenk 3163c609719bSwdenkInstalling a Linux Image: 3164c609719bSwdenk------------------------- 3165c609719bSwdenk 3166c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3167c609719bSwdenkyou must convert the image to S-Record format: 3168c609719bSwdenk 3169c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3170c609719bSwdenk 3171c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3172c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3173c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3174c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3175c609719bSwdenkcommand. 3176c609719bSwdenk 3177c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3178c609719bSwdenkTQM8xxL is in the first Flash bank): 3179c609719bSwdenk 3180c609719bSwdenk => erase 40100000 401FFFFF 3181c609719bSwdenk 3182c609719bSwdenk .......... done 3183c609719bSwdenk Erased 8 sectors 3184c609719bSwdenk 3185c609719bSwdenk => loads 40100000 3186c609719bSwdenk ## Ready for S-Record download ... 3187c609719bSwdenk ~>examples/image.srec 3188c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3189c609719bSwdenk ... 3190c609719bSwdenk 15989 15990 15991 15992 3191c609719bSwdenk [file transfer complete] 3192c609719bSwdenk [connected] 3193c609719bSwdenk ## Start Addr = 0x00000000 3194c609719bSwdenk 3195c609719bSwdenk 3196c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3197c609719bSwdenkthis includes a checksum verification so you can be sure no data 3198c609719bSwdenkcorruption happened: 3199c609719bSwdenk 3200c609719bSwdenk => imi 40100000 3201c609719bSwdenk 3202c609719bSwdenk ## Checking Image at 40100000 ... 3203c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3204c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3205c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3206c609719bSwdenk Load Address: 00000000 3207c609719bSwdenk Entry Point: 0000000c 3208c609719bSwdenk Verifying Checksum ... OK 3209c609719bSwdenk 3210c609719bSwdenk 3211c609719bSwdenkBoot Linux: 3212c609719bSwdenk----------- 3213c609719bSwdenk 3214c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 3215c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 3216c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 3217c609719bSwdenkparameters. You can check and modify this variable using the 3218c609719bSwdenk"printenv" and "setenv" commands: 3219c609719bSwdenk 3220c609719bSwdenk 3221c609719bSwdenk => printenv bootargs 3222c609719bSwdenk bootargs=root=/dev/ram 3223c609719bSwdenk 3224c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3225c609719bSwdenk 3226c609719bSwdenk => printenv bootargs 3227c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3228c609719bSwdenk 3229c609719bSwdenk => bootm 40020000 3230c609719bSwdenk ## Booting Linux kernel at 40020000 ... 3231c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 3232c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3233c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 3234c609719bSwdenk Load Address: 00000000 3235c609719bSwdenk Entry Point: 0000000c 3236c609719bSwdenk Verifying Checksum ... OK 3237c609719bSwdenk Uncompressing Kernel Image ... OK 3238c609719bSwdenk 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 3239c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3240c609719bSwdenk time_init: decrementer frequency = 187500000/60 3241c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3242c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 3243c609719bSwdenk ... 3244c609719bSwdenk 3245c609719bSwdenkIf you want to boot a Linux kernel with initial ram disk, you pass 32467152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 3247c609719bSwdenkformat!) to the "bootm" command: 3248c609719bSwdenk 3249c609719bSwdenk => imi 40100000 40200000 3250c609719bSwdenk 3251c609719bSwdenk ## Checking Image at 40100000 ... 3252c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3253c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3254c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3255c609719bSwdenk Load Address: 00000000 3256c609719bSwdenk Entry Point: 0000000c 3257c609719bSwdenk Verifying Checksum ... OK 3258c609719bSwdenk 3259c609719bSwdenk ## Checking Image at 40200000 ... 3260c609719bSwdenk Image Name: Simple Ramdisk Image 3261c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3262c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3263c609719bSwdenk Load Address: 00000000 3264c609719bSwdenk Entry Point: 00000000 3265c609719bSwdenk Verifying Checksum ... OK 3266c609719bSwdenk 3267c609719bSwdenk => bootm 40100000 40200000 3268c609719bSwdenk ## Booting Linux kernel at 40100000 ... 3269c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3270c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3271c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3272c609719bSwdenk Load Address: 00000000 3273c609719bSwdenk Entry Point: 0000000c 3274c609719bSwdenk Verifying Checksum ... OK 3275c609719bSwdenk Uncompressing Kernel Image ... OK 3276c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 3277c609719bSwdenk Image Name: Simple Ramdisk Image 3278c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3279c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3280c609719bSwdenk Load Address: 00000000 3281c609719bSwdenk Entry Point: 00000000 3282c609719bSwdenk Verifying Checksum ... OK 3283c609719bSwdenk Loading Ramdisk ... OK 3284c609719bSwdenk 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 3285c609719bSwdenk Boot arguments: root=/dev/ram 3286c609719bSwdenk time_init: decrementer frequency = 187500000/60 3287c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3288c609719bSwdenk ... 3289c609719bSwdenk RAMDISK: Compressed image found at block 0 3290c609719bSwdenk VFS: Mounted root (ext2 filesystem). 3291c609719bSwdenk 3292c609719bSwdenk bash# 3293c609719bSwdenk 32940267768eSMatthew McClintockBoot Linux and pass a flat device tree: 32950267768eSMatthew McClintock----------- 32960267768eSMatthew McClintock 32970267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 32980267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 32990267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 33000267768eSMatthew McClintockflat device tree: 33010267768eSMatthew McClintock 33020267768eSMatthew McClintock=> print oftaddr 33030267768eSMatthew McClintockoftaddr=0x300000 33040267768eSMatthew McClintock=> print oft 33050267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 33060267768eSMatthew McClintock=> tftp $oftaddr $oft 33070267768eSMatthew McClintockSpeed: 1000, full duplex 33080267768eSMatthew McClintockUsing TSEC0 device 33090267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 33100267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 33110267768eSMatthew McClintockLoad address: 0x300000 33120267768eSMatthew McClintockLoading: # 33130267768eSMatthew McClintockdone 33140267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 33150267768eSMatthew McClintock=> tftp $loadaddr $bootfile 33160267768eSMatthew McClintockSpeed: 1000, full duplex 33170267768eSMatthew McClintockUsing TSEC0 device 33180267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 33190267768eSMatthew McClintockFilename 'uImage'. 33200267768eSMatthew McClintockLoad address: 0x200000 33210267768eSMatthew McClintockLoading:############ 33220267768eSMatthew McClintockdone 33230267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 33240267768eSMatthew McClintock=> print loadaddr 33250267768eSMatthew McClintockloadaddr=200000 33260267768eSMatthew McClintock=> print oftaddr 33270267768eSMatthew McClintockoftaddr=0x300000 33280267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 33290267768eSMatthew McClintock## Booting image at 00200000 ... 33300267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 33310267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 33320267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 33330267768eSMatthew McClintock Load Address: 00000000 33340267768eSMatthew McClintock Entry Point: 00000000 33350267768eSMatthew McClintock Verifying Checksum ... OK 33360267768eSMatthew McClintock Uncompressing Kernel Image ... OK 33370267768eSMatthew McClintockBooting using flat device tree at 0x300000 33380267768eSMatthew McClintockUsing MPC85xx ADS machine description 33390267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 33400267768eSMatthew McClintock[snip] 33410267768eSMatthew McClintock 33420267768eSMatthew McClintock 33436069ff26SwdenkMore About U-Boot Image Types: 33446069ff26Swdenk------------------------------ 33456069ff26Swdenk 33466069ff26SwdenkU-Boot supports the following image types: 33476069ff26Swdenk 33486069ff26Swdenk "Standalone Programs" are directly runnable in the environment 33496069ff26Swdenk provided by U-Boot; it is expected that (if they behave 33506069ff26Swdenk well) you can continue to work in U-Boot after return from 33516069ff26Swdenk the Standalone Program. 33526069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 33536069ff26Swdenk will take over control completely. Usually these programs 33546069ff26Swdenk will install their own set of exception handlers, device 33556069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 33566069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 33576069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 33586069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 33596069ff26Swdenk being started. 33606069ff26Swdenk "Multi-File Images" contain several images, typically an OS 33616069ff26Swdenk (Linux) kernel image and one or more data images like 33626069ff26Swdenk RAMDisks. This construct is useful for instance when you want 33636069ff26Swdenk to boot over the network using BOOTP etc., where the boot 33646069ff26Swdenk server provides just a single image file, but you want to get 33656069ff26Swdenk for instance an OS kernel and a RAMDisk image. 33666069ff26Swdenk 33676069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 33686069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 33696069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 33706069ff26Swdenk Immediately after the terminating 0 follow the images, one by 33716069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 33726069ff26Swdenk a multiple of 4 bytes). 33736069ff26Swdenk 33746069ff26Swdenk "Firmware Images" are binary images containing firmware (like 33756069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 33766069ff26Swdenk flash memory. 33776069ff26Swdenk 33786069ff26Swdenk "Script files" are command sequences that will be executed by 33796069ff26Swdenk U-Boot's command interpreter; this feature is especially 33806069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 33816069ff26Swdenk as command interpreter. 33826069ff26Swdenk 3383c609719bSwdenk 3384c609719bSwdenkStandalone HOWTO: 3385c609719bSwdenk================= 3386c609719bSwdenk 3387c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 3388c609719bSwdenkrun "standalone" applications, which can use some resources of 3389c609719bSwdenkU-Boot like console I/O functions or interrupt services. 3390c609719bSwdenk 3391c609719bSwdenkTwo simple examples are included with the sources: 3392c609719bSwdenk 3393c609719bSwdenk"Hello World" Demo: 3394c609719bSwdenk------------------- 3395c609719bSwdenk 3396c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 3397c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 3398c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 3399c609719bSwdenklike that: 3400c609719bSwdenk 3401c609719bSwdenk => loads 3402c609719bSwdenk ## Ready for S-Record download ... 3403c609719bSwdenk ~>examples/hello_world.srec 3404c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3405c609719bSwdenk [file transfer complete] 3406c609719bSwdenk [connected] 3407c609719bSwdenk ## Start Addr = 0x00040004 3408c609719bSwdenk 3409c609719bSwdenk => go 40004 Hello World! This is a test. 3410c609719bSwdenk ## Starting application at 0x00040004 ... 3411c609719bSwdenk Hello World 3412c609719bSwdenk argc = 7 3413c609719bSwdenk argv[0] = "40004" 3414c609719bSwdenk argv[1] = "Hello" 3415c609719bSwdenk argv[2] = "World!" 3416c609719bSwdenk argv[3] = "This" 3417c609719bSwdenk argv[4] = "is" 3418c609719bSwdenk argv[5] = "a" 3419c609719bSwdenk argv[6] = "test." 3420c609719bSwdenk argv[7] = "<NULL>" 3421c609719bSwdenk Hit any key to exit ... 3422c609719bSwdenk 3423c609719bSwdenk ## Application terminated, rc = 0x0 3424c609719bSwdenk 3425c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 3426c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 3427c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 3428c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 3429c609719bSwdenkcharacter, but this is just a demo program. The application can be 3430c609719bSwdenkcontrolled by the following keys: 3431c609719bSwdenk 3432c609719bSwdenk ? - print current values og the CPM Timer registers 3433c609719bSwdenk b - enable interrupts and start timer 3434c609719bSwdenk e - stop timer and disable interrupts 3435c609719bSwdenk q - quit application 3436c609719bSwdenk 3437c609719bSwdenk => loads 3438c609719bSwdenk ## Ready for S-Record download ... 3439c609719bSwdenk ~>examples/timer.srec 3440c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3441c609719bSwdenk [file transfer complete] 3442c609719bSwdenk [connected] 3443c609719bSwdenk ## Start Addr = 0x00040004 3444c609719bSwdenk 3445c609719bSwdenk => go 40004 3446c609719bSwdenk ## Starting application at 0x00040004 ... 3447c609719bSwdenk TIMERS=0xfff00980 3448c609719bSwdenk Using timer 1 3449c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 3450c609719bSwdenk 3451c609719bSwdenkHit 'b': 3452c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 3453c609719bSwdenk Enabling timer 3454c609719bSwdenkHit '?': 3455c609719bSwdenk [q, b, e, ?] ........ 3456c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 3457c609719bSwdenkHit '?': 3458c609719bSwdenk [q, b, e, ?] . 3459c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 3460c609719bSwdenkHit '?': 3461c609719bSwdenk [q, b, e, ?] . 3462c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 3463c609719bSwdenkHit '?': 3464c609719bSwdenk [q, b, e, ?] . 3465c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 3466c609719bSwdenkHit 'e': 3467c609719bSwdenk [q, b, e, ?] ...Stopping timer 3468c609719bSwdenkHit 'q': 3469c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 3470c609719bSwdenk 3471c609719bSwdenk 347285ec0bccSwdenkMinicom warning: 347385ec0bccSwdenk================ 347485ec0bccSwdenk 34757152b1d0SwdenkOver time, many people have reported problems when trying to use the 347685ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 347785ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 3478f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 347985ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 348085ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 348185ec0bccSwdenk 348252f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 348352f52c14Swdenkconfiguration to your "File transfer protocols" section: 348452f52c14Swdenk 348552f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 348652f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 348752f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 348852f52c14Swdenk 348952f52c14Swdenk 3490c609719bSwdenkNetBSD Notes: 3491c609719bSwdenk============= 3492c609719bSwdenk 3493c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 3494c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 3495c609719bSwdenk 3496c609719bSwdenkBuilding requires a cross environment; it is known to work on 3497c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 3498c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 3499c609719bSwdenkNote that the cross-powerpc package does not install include files; 3500c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 3501c609719bSwdenkmissing. This file has to be installed and patched manually: 3502c609719bSwdenk 3503c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 3504c609719bSwdenk # mkdir powerpc 3505c609719bSwdenk # ln -s powerpc machine 3506c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 3507c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 3508c609719bSwdenk 3509c609719bSwdenkNative builds *don't* work due to incompatibilities between native 3510c609719bSwdenkand U-Boot include files. 3511c609719bSwdenk 3512c609719bSwdenkBooting assumes that (the first part of) the image booted is a 3513c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 3514c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 3515c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 35162a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 3517c609719bSwdenk 3518c609719bSwdenk 3519c609719bSwdenkImplementation Internals: 3520c609719bSwdenk========================= 3521c609719bSwdenk 3522c609719bSwdenkThe following is not intended to be a complete description of every 3523c609719bSwdenkimplementation detail. However, it should help to understand the 3524c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 3525c609719bSwdenkhardware. 3526c609719bSwdenk 3527c609719bSwdenk 3528c609719bSwdenkInitial Stack, Global Data: 3529c609719bSwdenk--------------------------- 3530c609719bSwdenk 3531c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 3532c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 3533c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 3534c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 3535c609719bSwdenkis not initialized as zero. To be able to get a C environment working 3536c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 3537c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 3538c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 3539c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 3540c609719bSwdenklocked as (mis-) used as memory, etc. 3541c609719bSwdenk 35427152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 354343d9616cSwdenk u-boot-users mailing list: 354443d9616cSwdenk 354543d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 354643d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 354743d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 354843d9616cSwdenk ... 354943d9616cSwdenk 355043d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 355143d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 355243d9616cSwdenk require any physical RAM backing up the cache. The cleverness 355343d9616cSwdenk is that the cache is being used as a temporary supply of 355443d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 355543d9616cSwdenk beyond the scope of this list to expain the details, but you 355643d9616cSwdenk can see how this works by studying the cache architecture and 355743d9616cSwdenk operation in the architecture and processor-specific manuals. 355843d9616cSwdenk 355943d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 356043d9616cSwdenk is another option for the system designer to use as an 356143d9616cSwdenk initial stack/ram area prior to SDRAM being available. Either 356243d9616cSwdenk option should work for you. Using CS 4 should be fine if your 356343d9616cSwdenk board designers haven't used it for something that would 356443d9616cSwdenk cause you grief during the initial boot! It is frequently not 356543d9616cSwdenk used. 356643d9616cSwdenk 356743d9616cSwdenk CFG_INIT_RAM_ADDR should be somewhere that won't interfere 356843d9616cSwdenk with your processor/board/system design. The default value 356943d9616cSwdenk you will find in any recent u-boot distribution in 35708a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 357143d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 357243d9616cSwdenk it above 400_0000. Just make sure your board has no resources 357343d9616cSwdenk that are supposed to respond to that address! That code in 357443d9616cSwdenk start.S has been around a while and should work as is when 357543d9616cSwdenk you get the config right. 357643d9616cSwdenk 357743d9616cSwdenk -Chris Hallinan 357843d9616cSwdenk DS4.COM, Inc. 357943d9616cSwdenk 3580c609719bSwdenkIt is essential to remember this, since it has some impact on the C 3581c609719bSwdenkcode for the initialization procedures: 3582c609719bSwdenk 3583c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 3584c609719bSwdenk to write it. 3585c609719bSwdenk 3586c609719bSwdenk* Do not use any unitialized global data (or implicitely initialized 3587c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 35887152b1d0Swdenk zation is performed later (when relocating to RAM). 3589c609719bSwdenk 3590c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 3591c609719bSwdenk that. 3592c609719bSwdenk 3593c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 3594c609719bSwdenknormal global data to share information beween the code. But it 3595c609719bSwdenkturned out that the implementation of U-Boot can be greatly 3596c609719bSwdenksimplified by making a global data structure (gd_t) available to all 3597c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 3598c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 3599c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 3600c609719bSwdenkplace a pointer (gd) to the global data into a register which we 3601c609719bSwdenkreserve for this purpose. 3602c609719bSwdenk 36037152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 3604c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 3605c609719bSwdenkGCC's implementation. 3606c609719bSwdenk 3607c609719bSwdenkFor PowerPC, the following registers have specific use: 3608c609719bSwdenk R1: stack pointer 3609e7670f6cSWolfgang Denk R2: reserved for system use 3610c609719bSwdenk R3-R4: parameter passing and return values 3611c609719bSwdenk R5-R10: parameter passing 3612c609719bSwdenk R13: small data area pointer 3613c609719bSwdenk R30: GOT pointer 3614c609719bSwdenk R31: frame pointer 3615c609719bSwdenk 3616c609719bSwdenk (U-Boot also uses R14 as internal GOT pointer.) 3617c609719bSwdenk 3618e7670f6cSWolfgang Denk ==> U-Boot will use R2 to hold a pointer to the global data 3619c609719bSwdenk 3620c609719bSwdenk Note: on PPC, we could use a static initializer (since the 3621c609719bSwdenk address of the global data structure is known at compile time), 3622c609719bSwdenk but it turned out that reserving a register results in somewhat 3623c609719bSwdenk smaller code - although the code savings are not that big (on 3624c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 3625c609719bSwdenk 624 text + 127 data). 3626c609719bSwdenk 36274c58eb55SMike FrysingerOn Blackfin, the normal C ABI (except for P5) is followed as documented here: 36284c58eb55SMike Frysinger http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface 36294c58eb55SMike Frysinger 36304c58eb55SMike Frysinger ==> U-Boot will use P5 to hold a pointer to the global data 36314c58eb55SMike Frysinger 3632c609719bSwdenkOn ARM, the following registers are used: 3633c609719bSwdenk 3634c609719bSwdenk R0: function argument word/integer result 3635c609719bSwdenk R1-R3: function argument word 3636c609719bSwdenk R9: GOT pointer 3637c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 3638c609719bSwdenk R11: argument (frame) pointer 3639c609719bSwdenk R12: temporary workspace 3640c609719bSwdenk R13: stack pointer 3641c609719bSwdenk R14: link register 3642c609719bSwdenk R15: program counter 3643c609719bSwdenk 3644c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 3645c609719bSwdenk 3646d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 3647d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 3648c609719bSwdenk 3649c609719bSwdenkMemory Management: 3650c609719bSwdenk------------------ 3651c609719bSwdenk 3652c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 3653c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 3654c609719bSwdenk 3655c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 3656c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 3657c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 3658c609719bSwdenkphysical memory banks. 3659c609719bSwdenk 3660c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 3661c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 3662c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 3663c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 3664c609719bSwdenkmemory is reserved for use by malloc() [see CFG_MALLOC_LEN 3665c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 3666c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 3667c609719bSwdenk 3668c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 3669c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 3670c609719bSwdenk 3671c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 3672c609719bSwdenkthis: 3673c609719bSwdenk 3674c609719bSwdenk 0x0000 0000 Exception Vector code 3675c609719bSwdenk : 3676c609719bSwdenk 0x0000 1FFF 3677c609719bSwdenk 0x0000 2000 Free for Application Use 3678c609719bSwdenk : 3679c609719bSwdenk : 3680c609719bSwdenk 3681c609719bSwdenk : 3682c609719bSwdenk : 3683c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 3684c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 3685c609719bSwdenk 0x00FC 0000 Malloc Arena 3686c609719bSwdenk : 3687c609719bSwdenk 0x00FD FFFF 3688c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 3689c609719bSwdenk ... eventually: LCD or video framebuffer 3690c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 3691c609719bSwdenk 0x00FF FFFF [End of RAM] 3692c609719bSwdenk 3693c609719bSwdenk 3694c609719bSwdenkSystem Initialization: 3695c609719bSwdenk---------------------- 3696c609719bSwdenk 3697c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 3698c609719bSwdenk(on most PowerPC systens at address 0x00000100). Because of the reset 3699c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 37007152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 3701c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 3702c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 3703c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 3704c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 3705c609719bSwdenkthe caches and the SIU. 3706c609719bSwdenk 3707c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 3708c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 3709c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 3710c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 3711c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 3712c609719bSwdenksimple memory test is run that determines the size of the SDRAM 3713c609719bSwdenkbanks. 3714c609719bSwdenk 3715c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 37167152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 3717c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 3718c609719bSwdenk0x00000000, with any additional banks following immediately to create 3719c609719bSwdenkcontiguous memory starting from 0. 3720c609719bSwdenk 3721c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 3722c609719bSwdenkand allocates memory for use by malloc() and for the global Board 3723c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 3724c609719bSwdenkpages, and the final stack is set up. 3725c609719bSwdenk 3726c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 3727c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 3728c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 3729c609719bSwdenknew address in RAM. 3730c609719bSwdenk 3731c609719bSwdenk 3732c609719bSwdenkU-Boot Porting Guide: 3733c609719bSwdenk---------------------- 3734c609719bSwdenk 3735c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 37366aff3115Swdenklist, October 2002] 3737c609719bSwdenk 3738c609719bSwdenk 3739c609719bSwdenkint main (int argc, char *argv[]) 3740c609719bSwdenk{ 3741c609719bSwdenk sighandler_t no_more_time; 3742c609719bSwdenk 3743c609719bSwdenk signal (SIGALRM, no_more_time); 3744c609719bSwdenk alarm (PROJECT_DEADLINE - toSec (3 * WEEK)); 3745c609719bSwdenk 3746c609719bSwdenk if (available_money > available_manpower) { 3747c609719bSwdenk pay consultant to port U-Boot; 3748c609719bSwdenk return 0; 3749c609719bSwdenk } 3750c609719bSwdenk 3751c609719bSwdenk Download latest U-Boot source; 3752c609719bSwdenk 37536aff3115Swdenk Subscribe to u-boot-users mailing list; 37546aff3115Swdenk 3755c609719bSwdenk if (clueless) { 3756c609719bSwdenk email ("Hi, I am new to U-Boot, how do I get started?"); 3757c609719bSwdenk } 3758c609719bSwdenk 3759c609719bSwdenk while (learning) { 3760c609719bSwdenk Read the README file in the top level directory; 37617cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual ; 3762c609719bSwdenk Read the source, Luke; 3763c609719bSwdenk } 3764c609719bSwdenk 3765c609719bSwdenk if (available_money > toLocalCurrency ($2500)) { 3766c609719bSwdenk Buy a BDI2000; 3767c609719bSwdenk } else { 3768c609719bSwdenk Add a lot of aggravation and time; 3769c609719bSwdenk } 3770c609719bSwdenk 3771c609719bSwdenk Create your own board support subdirectory; 3772c609719bSwdenk 37736aff3115Swdenk Create your own board config file; 37746aff3115Swdenk 3775c609719bSwdenk while (!running) { 3776c609719bSwdenk do { 3777c609719bSwdenk Add / modify source code; 3778c609719bSwdenk } until (compiles); 3779c609719bSwdenk Debug; 3780c609719bSwdenk if (clueless) 3781c609719bSwdenk email ("Hi, I am having problems..."); 3782c609719bSwdenk } 3783c609719bSwdenk Send patch file to Wolfgang; 3784c609719bSwdenk 3785c609719bSwdenk return 0; 3786c609719bSwdenk} 3787c609719bSwdenk 3788c609719bSwdenkvoid no_more_time (int sig) 3789c609719bSwdenk{ 3790c609719bSwdenk hire_a_guru(); 3791c609719bSwdenk} 3792c609719bSwdenk 3793c609719bSwdenk 3794c609719bSwdenkCoding Standards: 3795c609719bSwdenk----------------- 3796c609719bSwdenk 3797c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 37982c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 37992c051651SDetlev Zundel"scripts/Lindent" in your Linux kernel source directory. In sources 38002c051651SDetlev Zundeloriginating from U-Boot a style corresponding to "Lindent -pcs" (adding 38012c051651SDetlev Zundelspaces before parameters to function calls) is actually used. 3802c609719bSwdenk 38032c051651SDetlev ZundelSource files originating from a different project (for example the 38042c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 38052c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 38062c051651SDetlev Zundelsources. 38072c051651SDetlev Zundel 38082c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 38092c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 38102c051651SDetlev Zundelin your code. 3811c609719bSwdenk 3812c178d3daSwdenkPlease also stick to the following formatting rules: 3813180d3f74Swdenk- remove any trailing white space 3814180d3f74Swdenk- use TAB characters for indentation, not spaces 3815180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 3816180d3f74Swdenk- do not add more than 2 empty lines to source files 3817180d3f74Swdenk- do not add trailing empty lines to source files 3818180d3f74Swdenk 3819c609719bSwdenkSubmissions which do not conform to the standards may be returned 3820c609719bSwdenkwith a request to reformat the changes. 3821c609719bSwdenk 3822c609719bSwdenk 3823c609719bSwdenkSubmitting Patches: 3824c609719bSwdenk------------------- 3825c609719bSwdenk 3826c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 3827c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 3828c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 3829c609719bSwdenk 383090dc6704SwdenkPatches shall be sent to the u-boot-users mailing list. 3831c609719bSwdenk 3832218ca724SWolfgang DenkPlease see http://www.denx.de/wiki/UBoot/Patches for details. 3833218ca724SWolfgang Denk 3834c609719bSwdenkWhen you send a patch, please include the following information with 3835c609719bSwdenkit: 3836c609719bSwdenk 3837c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 3838c609719bSwdenk this bug. Please try to include a way of demonstrating that the 3839c609719bSwdenk patch actually fixes something. 3840c609719bSwdenk 3841c609719bSwdenk* For new features: a description of the feature and your 3842c609719bSwdenk implementation. 3843c609719bSwdenk 3844c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 3845c609719bSwdenk 3846c609719bSwdenk* For major contributions, your entry to the CREDITS file 3847c609719bSwdenk 3848c609719bSwdenk* When you add support for a new board, don't forget to add this 3849c609719bSwdenk board to the MAKEALL script, too. 3850c609719bSwdenk 3851c609719bSwdenk* If your patch adds new configuration options, don't forget to 3852c609719bSwdenk document these in the README file. 3853c609719bSwdenk 3854218ca724SWolfgang Denk* The patch itself. If you are using git (which is *strongly* 3855218ca724SWolfgang Denk recommended) you can easily generate the patch using the 3856218ca724SWolfgang Denk "git-format-patch". If you then use "git-send-email" to send it to 3857218ca724SWolfgang Denk the U-Boot mailing list, you will avoid most of the common problems 3858218ca724SWolfgang Denk with some other mail clients. 3859c609719bSwdenk 3860218ca724SWolfgang Denk If you cannot use git, use "diff -purN OLD NEW". If your version of 3861218ca724SWolfgang Denk diff does not support these options, then get the latest version of 3862218ca724SWolfgang Denk GNU diff. 38636dff5529Swdenk 3864218ca724SWolfgang Denk The current directory when running this command shall be the parent 3865218ca724SWolfgang Denk directory of the U-Boot source tree (i. e. please make sure that 3866218ca724SWolfgang Denk your patch includes sufficient directory information for the 3867218ca724SWolfgang Denk affected files). 3868218ca724SWolfgang Denk 3869218ca724SWolfgang Denk We prefer patches as plain text. MIME attachments are discouraged, 3870218ca724SWolfgang Denk and compressed attachments must not be used. 3871c609719bSwdenk 387252f52c14Swdenk* If one logical set of modifications affects or creates several 387352f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 387452f52c14Swdenk 387552f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 387652f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 387752f52c14Swdenk 387852f52c14Swdenk 3879c609719bSwdenkNotes: 3880c609719bSwdenk 3881c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 3882c609719bSwdenk source tree and make sure that no errors or warnings are reported 3883c609719bSwdenk for any of the boards. 3884c609719bSwdenk 3885c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 3886c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 3887c609719bSwdenk returned with a request to re-formatting / split it. 3888c609719bSwdenk 3889c609719bSwdenk* If you modify existing code, make sure that your new code does not 3890c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 3891c609719bSwdenk When adding new features, these should compile conditionally only 3892c609719bSwdenk (using #ifdef), and the resulting code with the new feature 3893c609719bSwdenk disabled must not need more memory than the old code without your 3894c609719bSwdenk modification. 389590dc6704Swdenk 389690dc6704Swdenk* Remember that there is a size limit of 40 kB per message on the 3897218ca724SWolfgang Denk u-boot-users mailing list. Bigger patches will be moderated. If 3898218ca724SWolfgang Denk they are reasonable and not bigger than 100 kB, they will be 3899218ca724SWolfgang Denk acknowledged. Even bigger patches should be avoided. 3900