1c609719bSwdenk# 2151ab83aSwdenk# (C) Copyright 2000 - 2005 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 54c609719bSwdenkwho contributed the specific port. 55c609719bSwdenk 56c609719bSwdenk 57c609719bSwdenkWhere to get help: 58c609719bSwdenk================== 59c609719bSwdenk 60c609719bSwdenkIn case you have questions about, problems with or contributions for 61c609719bSwdenkU-Boot you should send a message to the U-Boot mailing list at 62c609719bSwdenk<u-boot-users@lists.sourceforge.net>. There is also an archive of 63c609719bSwdenkprevious traffic on the mailing list - please search the archive 64c609719bSwdenkbefore asking FAQ's. Please see 65c609719bSwdenkhttp://lists.sourceforge.net/lists/listinfo/u-boot-users/ 66c609719bSwdenk 67c609719bSwdenk 68c609719bSwdenkWhere we come from: 69c609719bSwdenk=================== 70c609719bSwdenk 71c609719bSwdenk- start from 8xxrom sources 7224ee89b9Swdenk- create PPCBoot project (http://sourceforge.net/projects/ppcboot) 73c609719bSwdenk- clean up code 74c609719bSwdenk- make it easier to add custom boards 75c609719bSwdenk- make it possible to add other [PowerPC] CPUs 76c609719bSwdenk- extend functions, especially: 77c609719bSwdenk * Provide extended interface to Linux boot loader 78c609719bSwdenk * S-Record download 79c609719bSwdenk * network boot 80c609719bSwdenk * PCMCIA / CompactFLash / ATA disk / SCSI ... boot 8124ee89b9Swdenk- create ARMBoot project (http://sourceforge.net/projects/armboot) 82c609719bSwdenk- add other CPU families (starting with ARM) 8324ee89b9Swdenk- create U-Boot project (http://sourceforge.net/projects/u-boot) 8424ee89b9Swdenk 8524ee89b9Swdenk 8624ee89b9SwdenkNames and Spelling: 8724ee89b9Swdenk=================== 8824ee89b9Swdenk 8924ee89b9SwdenkThe "official" name of this project is "Das U-Boot". The spelling 9024ee89b9Swdenk"U-Boot" shall be used in all written text (documentation, comments 9124ee89b9Swdenkin source files etc.). Example: 9224ee89b9Swdenk 9324ee89b9Swdenk This is the README file for the U-Boot project. 9424ee89b9Swdenk 9524ee89b9SwdenkFile names etc. shall be based on the string "u-boot". Examples: 9624ee89b9Swdenk 9724ee89b9Swdenk include/asm-ppc/u-boot.h 9824ee89b9Swdenk 9924ee89b9Swdenk #include <asm/u-boot.h> 10024ee89b9Swdenk 10124ee89b9SwdenkVariable names, preprocessor constants etc. shall be either based on 10224ee89b9Swdenkthe string "u_boot" or on "U_BOOT". Example: 10324ee89b9Swdenk 10424ee89b9Swdenk U_BOOT_VERSION u_boot_logo 10524ee89b9Swdenk IH_OS_U_BOOT u_boot_hush_start 106c609719bSwdenk 107c609719bSwdenk 10893f19cc0SwdenkVersioning: 10993f19cc0Swdenk=========== 11093f19cc0Swdenk 11193f19cc0SwdenkU-Boot uses a 3 level version number containing a version, a 11293f19cc0Swdenksub-version, and a patchlevel: "U-Boot-2.34.5" means version "2", 11393f19cc0Swdenksub-version "34", and patchlevel "4". 11493f19cc0Swdenk 11593f19cc0SwdenkThe patchlevel is used to indicate certain stages of development 11693f19cc0Swdenkbetween released versions, i. e. officially released versions of 11793f19cc0SwdenkU-Boot will always have a patchlevel of "0". 11893f19cc0Swdenk 11993f19cc0Swdenk 120c609719bSwdenkDirectory Hierarchy: 121c609719bSwdenk==================== 122c609719bSwdenk 1237152b1d0Swdenk- board Board dependent files 1247152b1d0Swdenk- common Misc architecture independent functions 125c609719bSwdenk- cpu CPU specific files 126983fda83Swdenk - 74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs 12711dadd54Swdenk - arm720t Files specific to ARM 720 CPUs 12811dadd54Swdenk - arm920t Files specific to ARM 920 CPUs 129a85f9f21Swdenk - at91rm9200 Files specific to Atmel AT91RM9200 CPU 130983fda83Swdenk - imx Files specific to Freescale MC9328 i.MX CPUs 1311d9f4105Swdenk - s3c24x0 Files specific to Samsung S3C24X0 CPUs 13211dadd54Swdenk - arm925t Files specific to ARM 925 CPUs 13311dadd54Swdenk - arm926ejs Files specific to ARM 926 CPUs 1348ed96046Swdenk - arm1136 Files specific to ARM 1136 CPUs 13572a087e0SWolfgang Denk - at32ap Files specific to Atmel AVR32 AP CPUs 13611dadd54Swdenk - i386 Files specific to i386 CPUs 13711dadd54Swdenk - ixp Files specific to Intel XScale IXP CPUs 138983fda83Swdenk - mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs 1398e585f02STsiChung Liew - mcf532x Files specific to Freescale ColdFire MCF5329 CPUs 140*8ae158cdSTsiChungLiew - mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs 14111dadd54Swdenk - mips Files specific to MIPS CPUs 142983fda83Swdenk - mpc5xx Files specific to Freescale MPC5xx CPUs 143983fda83Swdenk - mpc5xxx Files specific to Freescale MPC5xxx CPUs 144983fda83Swdenk - mpc8xx Files specific to Freescale MPC8xx CPUs 145983fda83Swdenk - mpc8220 Files specific to Freescale MPC8220 CPUs 146983fda83Swdenk - mpc824x Files specific to Freescale MPC824x CPUs 147983fda83Swdenk - mpc8260 Files specific to Freescale MPC8260 CPUs 148983fda83Swdenk - mpc85xx Files specific to Freescale MPC85xx CPUs 14911dadd54Swdenk - nios Files specific to Altera NIOS CPUs 1505c952cf0Swdenk - nios2 Files specific to Altera Nios-II CPUs 1510c8721a4SWolfgang Denk - ppc4xx Files specific to AMCC PowerPC 4xx CPUs 15211dadd54Swdenk - pxa Files specific to Intel XScale PXA CPUs 15311dadd54Swdenk - s3c44b0 Files specific to Samsung S3C44B0 CPUs 15411dadd54Swdenk - sa1100 Files specific to Intel StrongARM SA1100 CPUs 155c609719bSwdenk- disk Code for disk drive partition handling 156c609719bSwdenk- doc Documentation (don't expect too much) 1577152b1d0Swdenk- drivers Commonly used device drivers 158c609719bSwdenk- dtt Digital Thermometer and Thermostat drivers 159c609719bSwdenk- examples Example code for standalone applications, etc. 160c609719bSwdenk- include Header Files 16111dadd54Swdenk- lib_arm Files generic to ARM architecture 1627b64fef3SWolfgang Denk- lib_avr32 Files generic to AVR32 architecture 16311dadd54Swdenk- lib_generic Files generic to all architectures 16411dadd54Swdenk- lib_i386 Files generic to i386 architecture 16511dadd54Swdenk- lib_m68k Files generic to m68k architecture 16611dadd54Swdenk- lib_mips Files generic to MIPS architecture 16711dadd54Swdenk- lib_nios Files generic to NIOS architecture 16811dadd54Swdenk- lib_ppc Files generic to PowerPC architecture 169213bf8c8SGerald Van Baren- libfdt Library files to support flattened device trees 170c609719bSwdenk- net Networking code 171c609719bSwdenk- post Power On Self Test 172c609719bSwdenk- rtc Real Time Clock drivers 173c609719bSwdenk- tools Tools to build S-Record or U-Boot images, etc. 174c609719bSwdenk 175c609719bSwdenkSoftware Configuration: 176c609719bSwdenk======================= 177c609719bSwdenk 178c609719bSwdenkConfiguration is usually done using C preprocessor defines; the 179c609719bSwdenkrationale behind that is to avoid dead code whenever possible. 180c609719bSwdenk 181c609719bSwdenkThere are two classes of configuration variables: 182c609719bSwdenk 183c609719bSwdenk* Configuration _OPTIONS_: 184c609719bSwdenk These are selectable by the user and have names beginning with 185c609719bSwdenk "CONFIG_". 186c609719bSwdenk 187c609719bSwdenk* Configuration _SETTINGS_: 188c609719bSwdenk These depend on the hardware etc. and should not be meddled with if 189c609719bSwdenk you don't know what you're doing; they have names beginning with 190c609719bSwdenk "CFG_". 191c609719bSwdenk 192c609719bSwdenkLater we will add a configuration tool - probably similar to or even 193c609719bSwdenkidentical to what's used for the Linux kernel. Right now, we have to 194c609719bSwdenkdo the configuration by hand, which means creating some symbolic 195c609719bSwdenklinks and editing some configuration files. We use the TQM8xxL boards 196c609719bSwdenkas an example here. 197c609719bSwdenk 198c609719bSwdenk 199c609719bSwdenkSelection of Processor Architecture and Board Type: 200c609719bSwdenk--------------------------------------------------- 201c609719bSwdenk 202c609719bSwdenkFor all supported boards there are ready-to-use default 203c609719bSwdenkconfigurations available; just type "make <board_name>_config". 204c609719bSwdenk 205c609719bSwdenkExample: For a TQM823L module type: 206c609719bSwdenk 207c609719bSwdenk cd u-boot 208c609719bSwdenk make TQM823L_config 209c609719bSwdenk 210c609719bSwdenkFor the Cogent platform, you need to specify the cpu type as well; 211c609719bSwdenke.g. "make cogent_mpc8xx_config". And also configure the cogent 212c609719bSwdenkdirectory according to the instructions in cogent/README. 213c609719bSwdenk 214c609719bSwdenk 215c609719bSwdenkConfiguration Options: 216c609719bSwdenk---------------------- 217c609719bSwdenk 218c609719bSwdenkConfiguration depends on the combination of board and CPU type; all 219c609719bSwdenksuch information is kept in a configuration file 220c609719bSwdenk"include/configs/<board_name>.h". 221c609719bSwdenk 222c609719bSwdenkExample: For a TQM823L module, all configuration settings are in 223c609719bSwdenk"include/configs/TQM823L.h". 224c609719bSwdenk 225c609719bSwdenk 2267f6c2cbcSwdenkMany of the options are named exactly as the corresponding Linux 2277f6c2cbcSwdenkkernel configuration options. The intention is to make it easier to 2287f6c2cbcSwdenkbuild a config tool - later. 2297f6c2cbcSwdenk 2307f6c2cbcSwdenk 231c609719bSwdenkThe following options need to be configured: 232c609719bSwdenk 2332628114eSKim Phillips- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. 234c609719bSwdenk 2352628114eSKim Phillips- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. 2366ccec449SWolfgang Denk 2376ccec449SWolfgang Denk- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) 2386ccec449SWolfgang Denk Define exactly one of 2396ccec449SWolfgang Denk CONFIG_ATSTK1002 2406ccec449SWolfgang Denk 241c609719bSwdenk 242c609719bSwdenk- CPU Module Type: (if CONFIG_COGENT is defined) 243c609719bSwdenk Define exactly one of 244c609719bSwdenk CONFIG_CMA286_60_OLD 245c609719bSwdenk--- FIXME --- not tested yet: 246c609719bSwdenk CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, 247c609719bSwdenk CONFIG_CMA287_23, CONFIG_CMA287_50 248c609719bSwdenk 249c609719bSwdenk- Motherboard Type: (if CONFIG_COGENT is defined) 250c609719bSwdenk Define exactly one of 251c609719bSwdenk CONFIG_CMA101, CONFIG_CMA102 252c609719bSwdenk 253c609719bSwdenk- Motherboard I/O Modules: (if CONFIG_COGENT is defined) 254c609719bSwdenk Define one or more of 255c609719bSwdenk CONFIG_CMA302 256c609719bSwdenk 257c609719bSwdenk- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) 258c609719bSwdenk Define one or more of 259c609719bSwdenk CONFIG_LCD_HEARTBEAT - update a character position on 260c609719bSwdenk the lcd display every second with 261c609719bSwdenk a "rotator" |\-/|\-/ 262c609719bSwdenk 2632535d602Swdenk- Board flavour: (if CONFIG_MPC8260ADS is defined) 2642535d602Swdenk CONFIG_ADSTYPE 2652535d602Swdenk Possible values are: 2662535d602Swdenk CFG_8260ADS - original MPC8260ADS 267180d3f74Swdenk CFG_8266ADS - MPC8266ADS 26854387ac9Swdenk CFG_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR 26904a85b3bSwdenk CFG_8272ADS - MPC8272ADS 2702535d602Swdenk 271c609719bSwdenk- MPC824X Family Member (if CONFIG_MPC824X is defined) 272c609719bSwdenk Define exactly one of 273c609719bSwdenk CONFIG_MPC8240, CONFIG_MPC8245 274c609719bSwdenk 27575d1ea7fSwdenk- 8xx CPU Options: (if using an MPC8xx cpu) 27666ca92a5Swdenk CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if 27766ca92a5Swdenk get_gclk_freq() cannot work 2785da627a4Swdenk e.g. if there is no 32KHz 2795da627a4Swdenk reference PIT/RTC clock 28066ca92a5Swdenk CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK 28166ca92a5Swdenk or XTAL/EXTAL) 282c609719bSwdenk 28366ca92a5Swdenk- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): 28466ca92a5Swdenk CFG_8xx_CPUCLK_MIN 28566ca92a5Swdenk CFG_8xx_CPUCLK_MAX 28666ca92a5Swdenk CONFIG_8xx_CPUCLK_DEFAULT 28775d1ea7fSwdenk See doc/README.MPC866 28875d1ea7fSwdenk 28975d1ea7fSwdenk CFG_MEASURE_CPUCLK 29075d1ea7fSwdenk 29175d1ea7fSwdenk Define this to measure the actual CPU clock instead 29275d1ea7fSwdenk of relying on the correctness of the configured 29375d1ea7fSwdenk values. Mostly useful for board bringup to make sure 29475d1ea7fSwdenk the PLL is locked at the intended frequency. Note 29575d1ea7fSwdenk that this requires a (stable) reference clock (32 kHz 29666ca92a5Swdenk RTC clock or CFG_8XX_XIN) 29775d1ea7fSwdenk 2980b953ffcSMarkus Klotzbuecher- Intel Monahans options: 2990b953ffcSMarkus Klotzbuecher CFG_MONAHANS_RUN_MODE_OSC_RATIO 3000b953ffcSMarkus Klotzbuecher 3010b953ffcSMarkus Klotzbuecher Defines the Monahans run mode to oscillator 3020b953ffcSMarkus Klotzbuecher ratio. Valid values are 8, 16, 24, 31. The core 3030b953ffcSMarkus Klotzbuecher frequency is this value multiplied by 13 MHz. 3040b953ffcSMarkus Klotzbuecher 3050b953ffcSMarkus Klotzbuecher CFG_MONAHANS_TURBO_RUN_MODE_RATIO 3060b953ffcSMarkus Klotzbuecher 3070b953ffcSMarkus Klotzbuecher Defines the Monahans turbo mode to oscillator 3080b953ffcSMarkus Klotzbuecher ratio. Valid values are 1 (default if undefined) and 3090b953ffcSMarkus Klotzbuecher 2. The core frequency as calculated above is multiplied 3100b953ffcSMarkus Klotzbuecher by this value. 3110b953ffcSMarkus Klotzbuecher 3125da627a4Swdenk- Linux Kernel Interface: 313c609719bSwdenk CONFIG_CLOCKS_IN_MHZ 314c609719bSwdenk 315c609719bSwdenk U-Boot stores all clock information in Hz 316c609719bSwdenk internally. For binary compatibility with older Linux 317c609719bSwdenk kernels (which expect the clocks passed in the 318c609719bSwdenk bd_info data to be in MHz) the environment variable 319c609719bSwdenk "clocks_in_mhz" can be defined so that U-Boot 320c609719bSwdenk converts clock data to MHZ before passing it to the 321c609719bSwdenk Linux kernel. 322c609719bSwdenk When CONFIG_CLOCKS_IN_MHZ is defined, a definition of 323c609719bSwdenk "clocks_in_mhz=1" is automatically included in the 324c609719bSwdenk default environment. 325c609719bSwdenk 3265da627a4Swdenk CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] 3275da627a4Swdenk 3285da627a4Swdenk When transfering memsize parameter to linux, some versions 3295da627a4Swdenk expect it to be in bytes, others in MB. 3305da627a4Swdenk Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. 3315da627a4Swdenk 332213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT / CONFIG_OF_FLAT_TREE 333f57f70aaSWolfgang Denk 334f57f70aaSWolfgang Denk New kernel versions are expecting firmware settings to be 335213bf8c8SGerald Van Baren passed using flattened device trees (based on open firmware 336213bf8c8SGerald Van Baren concepts). 337213bf8c8SGerald Van Baren 338213bf8c8SGerald Van Baren CONFIG_OF_LIBFDT 339213bf8c8SGerald Van Baren * New libfdt-based support 340213bf8c8SGerald Van Baren * Adds the "fdt" command 341213bf8c8SGerald Van Baren * The bootm command does _not_ modify the fdt 342213bf8c8SGerald Van Baren 343213bf8c8SGerald Van Baren CONFIG_OF_FLAT_TREE 344213bf8c8SGerald Van Baren * Deprecated, see CONFIG_OF_LIBFDT 345213bf8c8SGerald Van Baren * Original ft_build.c-based support 346213bf8c8SGerald Van Baren * Automatically modifies the dft as part of the bootm command 347213bf8c8SGerald Van Baren * The environment variable "disable_of", when set, 348213bf8c8SGerald Van Baren disables this functionality. 349f57f70aaSWolfgang Denk 350f57f70aaSWolfgang Denk CONFIG_OF_FLAT_TREE_MAX_SIZE 351f57f70aaSWolfgang Denk 352f57f70aaSWolfgang Denk The maximum size of the constructed OF tree. 353f57f70aaSWolfgang Denk 354f57f70aaSWolfgang Denk OF_CPU - The proper name of the cpus node. 355c2871f03SKumar Gala OF_SOC - The proper name of the soc node. 356f57f70aaSWolfgang Denk OF_TBCLK - The timebase frequency. 357c2871f03SKumar Gala OF_STDOUT_PATH - The path to the console device 358f57f70aaSWolfgang Denk 359e4f880edSKumar Gala CONFIG_OF_HAS_BD_T 360e4f880edSKumar Gala 361213bf8c8SGerald Van Baren * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command 362213bf8c8SGerald Van Baren * CONFIG_OF_FLAT_TREE - The resulting flat device tree 363213bf8c8SGerald Van Baren will have a copy of the bd_t. Space should be 364213bf8c8SGerald Van Baren pre-allocated in the dts for the bd_t. 365e4f880edSKumar Gala 366e4f880edSKumar Gala CONFIG_OF_HAS_UBOOT_ENV 367e4f880edSKumar Gala 368213bf8c8SGerald Van Baren * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command 369213bf8c8SGerald Van Baren * CONFIG_OF_FLAT_TREE - The resulting flat device tree 370213bf8c8SGerald Van Baren will have a copy of u-boot's environment variables 371e4f880edSKumar Gala 3724e253137SKumar Gala CONFIG_OF_BOARD_SETUP 3734e253137SKumar Gala 3744e253137SKumar Gala Board code has addition modification that it wants to make 3754e253137SKumar Gala to the flat device tree before handing it off to the kernel 3766705d81eSwdenk 3770267768eSMatthew McClintock CONFIG_OF_BOOT_CPU 3780267768eSMatthew McClintock 3790267768eSMatthew McClintock This define fills in the correct boot cpu in the boot 3800267768eSMatthew McClintock param header, the default value is zero if undefined. 3810267768eSMatthew McClintock 3826705d81eSwdenk- Serial Ports: 3836705d81eSwdenk CFG_PL010_SERIAL 3846705d81eSwdenk 3856705d81eSwdenk Define this if you want support for Amba PrimeCell PL010 UARTs. 3866705d81eSwdenk 3876705d81eSwdenk CFG_PL011_SERIAL 3886705d81eSwdenk 3896705d81eSwdenk Define this if you want support for Amba PrimeCell PL011 UARTs. 3906705d81eSwdenk 3916705d81eSwdenk CONFIG_PL011_CLOCK 3926705d81eSwdenk 3936705d81eSwdenk If you have Amba PrimeCell PL011 UARTs, set this variable to 3946705d81eSwdenk the clock speed of the UARTs. 3956705d81eSwdenk 3966705d81eSwdenk CONFIG_PL01x_PORTS 3976705d81eSwdenk 3986705d81eSwdenk If you have Amba PrimeCell PL010 or PL011 UARTs on your board, 3996705d81eSwdenk define this to a list of base addresses for each (supported) 4006705d81eSwdenk port. See e.g. include/configs/versatile.h 4016705d81eSwdenk 4026705d81eSwdenk 403c609719bSwdenk- Console Interface: 404c609719bSwdenk Depending on board, define exactly one serial port 405c609719bSwdenk (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, 406c609719bSwdenk CONFIG_8xx_CONS_SCC1, ...), or switch off the serial 407c609719bSwdenk console by defining CONFIG_8xx_CONS_NONE 408c609719bSwdenk 409c609719bSwdenk Note: if CONFIG_8xx_CONS_NONE is defined, the serial 410c609719bSwdenk port routines must be defined elsewhere 411c609719bSwdenk (i.e. serial_init(), serial_getc(), ...) 412c609719bSwdenk 413c609719bSwdenk CONFIG_CFB_CONSOLE 414c609719bSwdenk Enables console device for a color framebuffer. Needs following 415c609719bSwdenk defines (cf. smiLynxEM, i8042, board/eltec/bab7xx) 416c609719bSwdenk VIDEO_FB_LITTLE_ENDIAN graphic memory organisation 417c609719bSwdenk (default big endian) 418c609719bSwdenk VIDEO_HW_RECTFILL graphic chip supports 419c609719bSwdenk rectangle fill 420c609719bSwdenk (cf. smiLynxEM) 421c609719bSwdenk VIDEO_HW_BITBLT graphic chip supports 422c609719bSwdenk bit-blit (cf. smiLynxEM) 423c609719bSwdenk VIDEO_VISIBLE_COLS visible pixel columns 424c609719bSwdenk (cols=pitch) 425c609719bSwdenk VIDEO_VISIBLE_ROWS visible pixel rows 426c609719bSwdenk VIDEO_PIXEL_SIZE bytes per pixel 427c609719bSwdenk VIDEO_DATA_FORMAT graphic data format 428c609719bSwdenk (0-5, cf. cfb_console.c) 429c609719bSwdenk VIDEO_FB_ADRS framebuffer address 430c609719bSwdenk VIDEO_KBD_INIT_FCT keyboard int fct 431c609719bSwdenk (i.e. i8042_kbd_init()) 432c609719bSwdenk VIDEO_TSTC_FCT test char fct 433c609719bSwdenk (i.e. i8042_tstc) 434c609719bSwdenk VIDEO_GETC_FCT get char fct 435c609719bSwdenk (i.e. i8042_getc) 436c609719bSwdenk CONFIG_CONSOLE_CURSOR cursor drawing on/off 437c609719bSwdenk (requires blink timer 438c609719bSwdenk cf. i8042.c) 439c609719bSwdenk CFG_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c) 440c609719bSwdenk CONFIG_CONSOLE_TIME display time/date info in 441c609719bSwdenk upper right corner 442602ad3b3SJon Loeliger (requires CONFIG_CMD_DATE) 443c609719bSwdenk CONFIG_VIDEO_LOGO display Linux logo in 444c609719bSwdenk upper left corner 445a6c7ad2fSwdenk CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of 446a6c7ad2fSwdenk linux_logo.h for logo. 447a6c7ad2fSwdenk Requires CONFIG_VIDEO_LOGO 448c609719bSwdenk CONFIG_CONSOLE_EXTRA_INFO 449c609719bSwdenk addional board info beside 450c609719bSwdenk the logo 451c609719bSwdenk 452c609719bSwdenk When CONFIG_CFB_CONSOLE is defined, video console is 453c609719bSwdenk default i/o. Serial console can be forced with 454c609719bSwdenk environment 'console=serial'. 455c609719bSwdenk 456a3ad8e26Swdenk When CONFIG_SILENT_CONSOLE is defined, all console 457a3ad8e26Swdenk messages (by U-Boot and Linux!) can be silenced with 458a3ad8e26Swdenk the "silent" environment variable. See 459a3ad8e26Swdenk doc/README.silent for more information. 460a3ad8e26Swdenk 461c609719bSwdenk- Console Baudrate: 462c609719bSwdenk CONFIG_BAUDRATE - in bps 463c609719bSwdenk Select one of the baudrates listed in 464c609719bSwdenk CFG_BAUDRATE_TABLE, see below. 4653bbc899fSwdenk CFG_BRGCLK_PRESCALE, baudrate prescale 466c609719bSwdenk 467c609719bSwdenk- Interrupt driven serial port input: 468c609719bSwdenk CONFIG_SERIAL_SOFTWARE_FIFO 469c609719bSwdenk 470c609719bSwdenk PPC405GP only. 471c609719bSwdenk Use an interrupt handler for receiving data on the 472c609719bSwdenk serial port. It also enables using hardware handshake 473c609719bSwdenk (RTS/CTS) and UART's built-in FIFO. Set the number of 474c609719bSwdenk bytes the interrupt driven input buffer should have. 475c609719bSwdenk 476109c0e3aSwdenk Leave undefined to disable this feature, including 477109c0e3aSwdenk disable the buffer and hardware handshake. 478c609719bSwdenk 4791d49b1f3Sstroese- Console UART Number: 4801d49b1f3Sstroese CONFIG_UART1_CONSOLE 4811d49b1f3Sstroese 4820c8721a4SWolfgang Denk AMCC PPC4xx only. 4831d49b1f3Sstroese If defined internal UART1 (and not UART0) is used 4841d49b1f3Sstroese as default U-Boot console. 4851d49b1f3Sstroese 486c609719bSwdenk- Boot Delay: CONFIG_BOOTDELAY - in seconds 487c609719bSwdenk Delay before automatically booting the default image; 488c609719bSwdenk set to -1 to disable autoboot. 489c609719bSwdenk 490c609719bSwdenk See doc/README.autoboot for these options that 491c609719bSwdenk work with CONFIG_BOOTDELAY. None are required. 492c609719bSwdenk CONFIG_BOOT_RETRY_TIME 493c609719bSwdenk CONFIG_BOOT_RETRY_MIN 494c609719bSwdenk CONFIG_AUTOBOOT_KEYED 495c609719bSwdenk CONFIG_AUTOBOOT_PROMPT 496c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR 497c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR 498c609719bSwdenk CONFIG_AUTOBOOT_DELAY_STR2 499c609719bSwdenk CONFIG_AUTOBOOT_STOP_STR2 500c609719bSwdenk CONFIG_ZERO_BOOTDELAY_CHECK 501c609719bSwdenk CONFIG_RESET_TO_RETRY 502c609719bSwdenk 503c609719bSwdenk- Autoboot Command: 504c609719bSwdenk CONFIG_BOOTCOMMAND 505c609719bSwdenk Only needed when CONFIG_BOOTDELAY is enabled; 506c609719bSwdenk define a command string that is automatically executed 507c609719bSwdenk when no character is read on the console interface 508c609719bSwdenk within "Boot Delay" after reset. 509c609719bSwdenk 510c609719bSwdenk CONFIG_BOOTARGS 511c609719bSwdenk This can be used to pass arguments to the bootm 512c609719bSwdenk command. The value of CONFIG_BOOTARGS goes into the 513c609719bSwdenk environment value "bootargs". 514c609719bSwdenk 515c609719bSwdenk CONFIG_RAMBOOT and CONFIG_NFSBOOT 516c609719bSwdenk The value of these goes into the environment as 517c609719bSwdenk "ramboot" and "nfsboot" respectively, and can be used 518c609719bSwdenk as a convenience, when switching between booting from 519c609719bSwdenk ram and nfs. 520c609719bSwdenk 521c609719bSwdenk- Pre-Boot Commands: 522c609719bSwdenk CONFIG_PREBOOT 523c609719bSwdenk 524c609719bSwdenk When this option is #defined, the existence of the 525c609719bSwdenk environment variable "preboot" will be checked 526c609719bSwdenk immediately before starting the CONFIG_BOOTDELAY 527c609719bSwdenk countdown and/or running the auto-boot command resp. 528c609719bSwdenk entering interactive mode. 529c609719bSwdenk 530c609719bSwdenk This feature is especially useful when "preboot" is 531c609719bSwdenk automatically generated or modified. For an example 532c609719bSwdenk see the LWMON board specific code: here "preboot" is 533c609719bSwdenk modified when the user holds down a certain 534c609719bSwdenk combination of keys on the (special) keyboard when 535c609719bSwdenk booting the systems 536c609719bSwdenk 537c609719bSwdenk- Serial Download Echo Mode: 538c609719bSwdenk CONFIG_LOADS_ECHO 539c609719bSwdenk If defined to 1, all characters received during a 540c609719bSwdenk serial download (using the "loads" command) are 541c609719bSwdenk echoed back. This might be needed by some terminal 542c609719bSwdenk emulations (like "cu"), but may as well just take 543c609719bSwdenk time on others. This setting #define's the initial 544c609719bSwdenk value of the "loads_echo" environment variable. 545c609719bSwdenk 546602ad3b3SJon Loeliger- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) 547c609719bSwdenk CONFIG_KGDB_BAUDRATE 548c609719bSwdenk Select one of the baudrates listed in 549c609719bSwdenk CFG_BAUDRATE_TABLE, see below. 550c609719bSwdenk 551c609719bSwdenk- Monitor Functions: 552602ad3b3SJon Loeliger Monitor commands can be included or excluded 553602ad3b3SJon Loeliger from the build by using the #include files 554602ad3b3SJon Loeliger "config_cmd_all.h" and #undef'ing unwanted 555602ad3b3SJon Loeliger commands, or using "config_cmd_default.h" 556602ad3b3SJon Loeliger and augmenting with additional #define's 557602ad3b3SJon Loeliger for wanted commands. 558c609719bSwdenk 559602ad3b3SJon Loeliger The default command configuration includes all commands 560602ad3b3SJon Loeliger except those marked below with a "*". 561602ad3b3SJon Loeliger 562602ad3b3SJon Loeliger CONFIG_CMD_ASKENV * ask for env variable 563602ad3b3SJon Loeliger CONFIG_CMD_AUTOSCRIPT Autoscript Support 564602ad3b3SJon Loeliger CONFIG_CMD_BDI bdinfo 565602ad3b3SJon Loeliger CONFIG_CMD_BEDBUG * Include BedBug Debugger 566602ad3b3SJon Loeliger CONFIG_CMD_BMP * BMP support 567602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board specific commands 568602ad3b3SJon Loeliger CONFIG_CMD_BOOTD bootd 569602ad3b3SJon Loeliger CONFIG_CMD_CACHE * icache, dcache 570602ad3b3SJon Loeliger CONFIG_CMD_CONSOLE coninfo 571602ad3b3SJon Loeliger CONFIG_CMD_DATE * support for RTC, date/time... 572602ad3b3SJon Loeliger CONFIG_CMD_DHCP * DHCP support 573602ad3b3SJon Loeliger CONFIG_CMD_DIAG * Diagnostics 574602ad3b3SJon Loeliger CONFIG_CMD_DOC * Disk-On-Chip Support 575602ad3b3SJon Loeliger CONFIG_CMD_DTT * Digital Therm and Thermostat 576602ad3b3SJon Loeliger CONFIG_CMD_ECHO echo arguments 577602ad3b3SJon Loeliger CONFIG_CMD_EEPROM * EEPROM read/write support 578602ad3b3SJon Loeliger CONFIG_CMD_ELF * bootelf, bootvx 579602ad3b3SJon Loeliger CONFIG_CMD_ENV saveenv 580602ad3b3SJon Loeliger CONFIG_CMD_FDC * Floppy Disk Support 581602ad3b3SJon Loeliger CONFIG_CMD_FAT * FAT partition support 582602ad3b3SJon Loeliger CONFIG_CMD_FDOS * Dos diskette Support 583602ad3b3SJon Loeliger CONFIG_CMD_FLASH flinfo, erase, protect 584602ad3b3SJon Loeliger CONFIG_CMD_FPGA FPGA device initialization support 585602ad3b3SJon Loeliger CONFIG_CMD_HWFLOW * RTS/CTS hw flow control 586602ad3b3SJon Loeliger CONFIG_CMD_I2C * I2C serial bus support 587602ad3b3SJon Loeliger CONFIG_CMD_IDE * IDE harddisk support 588602ad3b3SJon Loeliger CONFIG_CMD_IMI iminfo 589602ad3b3SJon Loeliger CONFIG_CMD_IMLS List all found images 590602ad3b3SJon Loeliger CONFIG_CMD_IMMAP * IMMR dump support 591602ad3b3SJon Loeliger CONFIG_CMD_IRQ * irqinfo 592602ad3b3SJon Loeliger CONFIG_CMD_ITEST Integer/string test of 2 values 593602ad3b3SJon Loeliger CONFIG_CMD_JFFS2 * JFFS2 Support 594602ad3b3SJon Loeliger CONFIG_CMD_KGDB * kgdb 595602ad3b3SJon Loeliger CONFIG_CMD_LOADB loadb 596602ad3b3SJon Loeliger CONFIG_CMD_LOADS loads 597602ad3b3SJon Loeliger CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, 59856523f12Swdenk loop, loopw, mtest 599602ad3b3SJon Loeliger CONFIG_CMD_MISC Misc functions like sleep etc 600602ad3b3SJon Loeliger CONFIG_CMD_MMC * MMC memory mapped support 601602ad3b3SJon Loeliger CONFIG_CMD_MII * MII utility commands 602602ad3b3SJon Loeliger CONFIG_CMD_NAND * NAND support 603602ad3b3SJon Loeliger CONFIG_CMD_NET bootp, tftpboot, rarpboot 604602ad3b3SJon Loeliger CONFIG_CMD_PCI * pciinfo 605602ad3b3SJon Loeliger CONFIG_CMD_PCMCIA * PCMCIA support 606602ad3b3SJon Loeliger CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network 607602ad3b3SJon Loeliger host 608602ad3b3SJon Loeliger CONFIG_CMD_PORTIO * Port I/O 609602ad3b3SJon Loeliger CONFIG_CMD_REGINFO * Register dump 610602ad3b3SJon Loeliger CONFIG_CMD_RUN run command in env variable 611602ad3b3SJon Loeliger CONFIG_CMD_SAVES * save S record dump 612602ad3b3SJon Loeliger CONFIG_CMD_SCSI * SCSI Support 613602ad3b3SJon Loeliger CONFIG_CMD_SDRAM * print SDRAM configuration information 614602ad3b3SJon Loeliger (requires CONFIG_CMD_I2C) 615602ad3b3SJon Loeliger CONFIG_CMD_SETGETDCR Support for DCR Register access 616602ad3b3SJon Loeliger (4xx only) 617602ad3b3SJon Loeliger CONFIG_CMD_SPI * SPI serial bus support 618602ad3b3SJon Loeliger CONFIG_CMD_USB * USB support 619602ad3b3SJon Loeliger CONFIG_CMD_VFD * VFD support (TRAB) 620602ad3b3SJon Loeliger CONFIG_CMD_BSP * Board SPecific functions 621602ad3b3SJon Loeliger CONFIG_CMD_CDP * Cisco Discover Protocol support 622602ad3b3SJon Loeliger CONFIG_CMD_FSL * Microblaze FSL support 623c609719bSwdenk 624c609719bSwdenk 625c609719bSwdenk EXAMPLE: If you want all functions except of network 626c609719bSwdenk support you can write: 627c609719bSwdenk 628602ad3b3SJon Loeliger #include "config_cmd_all.h" 629602ad3b3SJon Loeliger #undef CONFIG_CMD_NET 630c609719bSwdenk 631213bf8c8SGerald Van Baren Other Commands: 632213bf8c8SGerald Van Baren fdt (flattened device tree) command: CONFIG_OF_LIBFDT 633c609719bSwdenk 634c609719bSwdenk Note: Don't enable the "icache" and "dcache" commands 635602ad3b3SJon Loeliger (configuration option CONFIG_CMD_CACHE) unless you know 636c609719bSwdenk what you (and your U-Boot users) are doing. Data 637c609719bSwdenk cache cannot be enabled on systems like the 8xx or 638c609719bSwdenk 8260 (where accesses to the IMMR region must be 639c609719bSwdenk uncached), and it cannot be disabled on all other 640c609719bSwdenk systems where we (mis-) use the data cache to hold an 641c609719bSwdenk initial stack and some data. 642c609719bSwdenk 643c609719bSwdenk 644c609719bSwdenk XXX - this list needs to get updated! 645c609719bSwdenk 646c609719bSwdenk- Watchdog: 647c609719bSwdenk CONFIG_WATCHDOG 648c609719bSwdenk If this variable is defined, it enables watchdog 6497152b1d0Swdenk support. There must be support in the platform specific 650c609719bSwdenk code for a watchdog. For the 8xx and 8260 CPUs, the 651c609719bSwdenk SIU Watchdog feature is enabled in the SYPCR 652c609719bSwdenk register. 653c609719bSwdenk 654c1551ea8Sstroese- U-Boot Version: 655c1551ea8Sstroese CONFIG_VERSION_VARIABLE 656c1551ea8Sstroese If this variable is defined, an environment variable 657c1551ea8Sstroese named "ver" is created by U-Boot showing the U-Boot 658c1551ea8Sstroese version as printed by the "version" command. 659c1551ea8Sstroese This variable is readonly. 660c1551ea8Sstroese 661c609719bSwdenk- Real-Time Clock: 662c609719bSwdenk 663602ad3b3SJon Loeliger When CONFIG_CMD_DATE is selected, the type of the RTC 664c609719bSwdenk has to be selected, too. Define exactly one of the 665c609719bSwdenk following options: 666c609719bSwdenk 667c609719bSwdenk CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx 668c609719bSwdenk CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC 669c609719bSwdenk CONFIG_RTC_MC146818 - use MC146818 RTC 6701cb8e980Swdenk CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC 671c609719bSwdenk CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC 6727f70e853Swdenk CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC 6733bac3513Swdenk CONFIG_RTC_DS164x - use Dallas DS164x RTC 6744c0d4c3bSwdenk CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC 675c609719bSwdenk 676b37c7e5eSwdenk Note that if the RTC uses I2C, then the I2C interface 677b37c7e5eSwdenk must also be configured. See I2C Support, below. 678b37c7e5eSwdenk 679c609719bSwdenk- Timestamp Support: 680c609719bSwdenk 681c609719bSwdenk When CONFIG_TIMESTAMP is selected, the timestamp 682c609719bSwdenk (date and time) of an image is printed by image 683c609719bSwdenk commands like bootm or iminfo. This option is 684602ad3b3SJon Loeliger automatically enabled when you select CONFIG_CMD_DATE . 685c609719bSwdenk 686c609719bSwdenk- Partition Support: 687c609719bSwdenk CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION 688c609719bSwdenk and/or CONFIG_ISO_PARTITION 689c609719bSwdenk 690602ad3b3SJon Loeliger If IDE or SCSI support is enabled (CONFIG_CMD_IDE or 691602ad3b3SJon Loeliger CONFIG_CMD_SCSI) you must configure support for at least 692c609719bSwdenk one partition type as well. 693c609719bSwdenk 694c609719bSwdenk- IDE Reset method: 6954d13cbadSwdenk CONFIG_IDE_RESET_ROUTINE - this is defined in several 6964d13cbadSwdenk board configurations files but used nowhere! 697c609719bSwdenk 6984d13cbadSwdenk CONFIG_IDE_RESET - is this is defined, IDE Reset will 6994d13cbadSwdenk be performed by calling the function 7004d13cbadSwdenk ide_set_reset(int reset) 7014d13cbadSwdenk which has to be defined in a board specific file 702c609719bSwdenk 703c609719bSwdenk- ATAPI Support: 704c609719bSwdenk CONFIG_ATAPI 705c609719bSwdenk 706c609719bSwdenk Set this to enable ATAPI support. 707c609719bSwdenk 708c40b2956Swdenk- LBA48 Support 709c40b2956Swdenk CONFIG_LBA48 710c40b2956Swdenk 711c40b2956Swdenk Set this to enable support for disks larger than 137GB 712c40b2956Swdenk Also look at CFG_64BIT_LBA ,CFG_64BIT_VSPRINTF and CFG_64BIT_STRTOUL 713c40b2956Swdenk Whithout these , LBA48 support uses 32bit variables and will 'only' 714c40b2956Swdenk support disks up to 2.1TB. 715c40b2956Swdenk 716c40b2956Swdenk CFG_64BIT_LBA: 717c40b2956Swdenk When enabled, makes the IDE subsystem use 64bit sector addresses. 718c40b2956Swdenk Default is 32bit. 719c40b2956Swdenk 720c609719bSwdenk- SCSI Support: 721c609719bSwdenk At the moment only there is only support for the 722c609719bSwdenk SYM53C8XX SCSI controller; define 723c609719bSwdenk CONFIG_SCSI_SYM53C8XX to enable it. 724c609719bSwdenk 725c609719bSwdenk CFG_SCSI_MAX_LUN [8], CFG_SCSI_MAX_SCSI_ID [7] and 726c609719bSwdenk CFG_SCSI_MAX_DEVICE [CFG_SCSI_MAX_SCSI_ID * 727c609719bSwdenk CFG_SCSI_MAX_LUN] can be adjusted to define the 728c609719bSwdenk maximum numbers of LUNs, SCSI ID's and target 729c609719bSwdenk devices. 730c609719bSwdenk CFG_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) 731c609719bSwdenk 732c609719bSwdenk- NETWORK Support (PCI): 733682011ffSwdenk CONFIG_E1000 734682011ffSwdenk Support for Intel 8254x gigabit chips. 735682011ffSwdenk 736c609719bSwdenk CONFIG_EEPRO100 737c609719bSwdenk Support for Intel 82557/82559/82559ER chips. 738c609719bSwdenk Optional CONFIG_EEPRO100_SROM_WRITE enables eeprom 739c609719bSwdenk write routine for first time initialisation. 740c609719bSwdenk 741c609719bSwdenk CONFIG_TULIP 742c609719bSwdenk Support for Digital 2114x chips. 743c609719bSwdenk Optional CONFIG_TULIP_SELECT_MEDIA for board specific 744c609719bSwdenk modem chip initialisation (KS8761/QS6611). 745c609719bSwdenk 746c609719bSwdenk CONFIG_NATSEMI 747c609719bSwdenk Support for National dp83815 chips. 748c609719bSwdenk 749c609719bSwdenk CONFIG_NS8382X 750c609719bSwdenk Support for National dp8382[01] gigabit chips. 751c609719bSwdenk 75245219c46Swdenk- NETWORK Support (other): 75345219c46Swdenk 75445219c46Swdenk CONFIG_DRIVER_LAN91C96 75545219c46Swdenk Support for SMSC's LAN91C96 chips. 75645219c46Swdenk 75745219c46Swdenk CONFIG_LAN91C96_BASE 75845219c46Swdenk Define this to hold the physical address 75945219c46Swdenk of the LAN91C96's I/O space 76045219c46Swdenk 76145219c46Swdenk CONFIG_LAN91C96_USE_32_BIT 76245219c46Swdenk Define this to enable 32 bit addressing 76345219c46Swdenk 764f39748aeSwdenk CONFIG_DRIVER_SMC91111 765f39748aeSwdenk Support for SMSC's LAN91C111 chip 766f39748aeSwdenk 767f39748aeSwdenk CONFIG_SMC91111_BASE 768f39748aeSwdenk Define this to hold the physical address 769f39748aeSwdenk of the device (I/O space) 770f39748aeSwdenk 771f39748aeSwdenk CONFIG_SMC_USE_32_BIT 772f39748aeSwdenk Define this if data bus is 32 bits 773f39748aeSwdenk 774f39748aeSwdenk CONFIG_SMC_USE_IOFUNCS 775f39748aeSwdenk Define this to use i/o functions instead of macros 776f39748aeSwdenk (some hardware wont work with macros) 777f39748aeSwdenk 778c609719bSwdenk- USB Support: 779c609719bSwdenk At the moment only the UHCI host controller is 7804d13cbadSwdenk supported (PIP405, MIP405, MPC5200); define 781c609719bSwdenk CONFIG_USB_UHCI to enable it. 782c609719bSwdenk define CONFIG_USB_KEYBOARD to enable the USB Keyboard 78330d56faeSwdenk and define CONFIG_USB_STORAGE to enable the USB 784c609719bSwdenk storage devices. 785c609719bSwdenk Note: 786c609719bSwdenk Supported are USB Keyboards and USB Floppy drives 787c609719bSwdenk (TEAC FD-05PUB). 7884d13cbadSwdenk MPC5200 USB requires additional defines: 7894d13cbadSwdenk CONFIG_USB_CLOCK 7904d13cbadSwdenk for 528 MHz Clock: 0x0001bbbb 7914d13cbadSwdenk CONFIG_USB_CONFIG 7924d13cbadSwdenk for differential drivers: 0x00001000 7934d13cbadSwdenk for single ended drivers: 0x00005000 794fdcfaa1bSZhang Wei CFG_USB_EVENT_POLL 795fdcfaa1bSZhang Wei May be defined to allow interrupt polling 796fdcfaa1bSZhang Wei instead of using asynchronous interrupts 7974d13cbadSwdenk 79816c8d5e7SWolfgang Denk- USB Device: 79916c8d5e7SWolfgang Denk Define the below if you wish to use the USB console. 80016c8d5e7SWolfgang Denk Once firmware is rebuilt from a serial console issue the 80116c8d5e7SWolfgang Denk command "setenv stdin usbtty; setenv stdout usbtty" and 80216c8d5e7SWolfgang Denk attach your usb cable. The Unix command "dmesg" should print 80316c8d5e7SWolfgang Denk it has found a new device. The environment variable usbtty 80416c8d5e7SWolfgang Denk can be set to gserial or cdc_acm to enable your device to 80516c8d5e7SWolfgang Denk appear to a USB host as a Linux gserial device or a 80616c8d5e7SWolfgang Denk Common Device Class Abstract Control Model serial device. 80716c8d5e7SWolfgang Denk If you select usbtty = gserial you should be able to enumerate 80816c8d5e7SWolfgang Denk a Linux host by 80916c8d5e7SWolfgang Denk # modprobe usbserial vendor=0xVendorID product=0xProductID 81016c8d5e7SWolfgang Denk else if using cdc_acm, simply setting the environment 81116c8d5e7SWolfgang Denk variable usbtty to be cdc_acm should suffice. The following 81216c8d5e7SWolfgang Denk might be defined in YourBoardName.h 81316c8d5e7SWolfgang Denk 81416c8d5e7SWolfgang Denk CONFIG_USB_DEVICE 81516c8d5e7SWolfgang Denk Define this to build a UDC device 81616c8d5e7SWolfgang Denk 81716c8d5e7SWolfgang Denk CONFIG_USB_TTY 81816c8d5e7SWolfgang Denk Define this to have a tty type of device available to 81916c8d5e7SWolfgang Denk talk to the UDC device 82016c8d5e7SWolfgang Denk 82116c8d5e7SWolfgang Denk CFG_CONSOLE_IS_IN_ENV 82216c8d5e7SWolfgang Denk Define this if you want stdin, stdout &/or stderr to 82316c8d5e7SWolfgang Denk be set to usbtty. 82416c8d5e7SWolfgang Denk 82516c8d5e7SWolfgang Denk mpc8xx: 82616c8d5e7SWolfgang Denk CFG_USB_EXTC_CLK 0xBLAH 82716c8d5e7SWolfgang Denk Derive USB clock from external clock "blah" 82816c8d5e7SWolfgang Denk - CFG_USB_EXTC_CLK 0x02 82916c8d5e7SWolfgang Denk 83016c8d5e7SWolfgang Denk CFG_USB_BRG_CLK 0xBLAH 83116c8d5e7SWolfgang Denk Derive USB clock from brgclk 83216c8d5e7SWolfgang Denk - CFG_USB_BRG_CLK 0x04 83316c8d5e7SWolfgang Denk 83416c8d5e7SWolfgang Denk If you have a USB-IF assigned VendorID then you may wish to 83516c8d5e7SWolfgang Denk define your own vendor specific values either in BoardName.h 83616c8d5e7SWolfgang Denk or directly in usbd_vendor_info.h. If you don't define 83716c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, 83816c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot 83916c8d5e7SWolfgang Denk should pretend to be a Linux device to it's target host. 84016c8d5e7SWolfgang Denk 84116c8d5e7SWolfgang Denk CONFIG_USBD_MANUFACTURER 84216c8d5e7SWolfgang Denk Define this string as the name of your company for 84316c8d5e7SWolfgang Denk - CONFIG_USBD_MANUFACTURER "my company" 84416c8d5e7SWolfgang Denk 84516c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCT_NAME 84616c8d5e7SWolfgang Denk Define this string as the name of your product 84716c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCT_NAME "acme usb device" 84816c8d5e7SWolfgang Denk 84916c8d5e7SWolfgang Denk CONFIG_USBD_VENDORID 85016c8d5e7SWolfgang Denk Define this as your assigned Vendor ID from the USB 85116c8d5e7SWolfgang Denk Implementors Forum. This *must* be a genuine Vendor ID 85216c8d5e7SWolfgang Denk to avoid polluting the USB namespace. 85316c8d5e7SWolfgang Denk - CONFIG_USBD_VENDORID 0xFFFF 85416c8d5e7SWolfgang Denk 85516c8d5e7SWolfgang Denk CONFIG_USBD_PRODUCTID 85616c8d5e7SWolfgang Denk Define this as the unique Product ID 85716c8d5e7SWolfgang Denk for your device 85816c8d5e7SWolfgang Denk - CONFIG_USBD_PRODUCTID 0xFFFF 859c609719bSwdenk 860c609719bSwdenk 861c609719bSwdenk- MMC Support: 862c609719bSwdenk The MMC controller on the Intel PXA is supported. To 863c609719bSwdenk enable this define CONFIG_MMC. The MMC can be 864c609719bSwdenk accessed from the boot prompt by mapping the device 865c609719bSwdenk to physical memory similar to flash. Command line is 866602ad3b3SJon Loeliger enabled with CONFIG_CMD_MMC. The MMC driver also works with 867602ad3b3SJon Loeliger the FAT fs. This is enabled with CONFIG_CMD_FAT. 868c609719bSwdenk 8696705d81eSwdenk- Journaling Flash filesystem support: 8706705d81eSwdenk CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, 8716705d81eSwdenk CONFIG_JFFS2_NAND_DEV 8726705d81eSwdenk Define these for a default partition on a NAND device 8736705d81eSwdenk 8746705d81eSwdenk CFG_JFFS2_FIRST_SECTOR, 8756705d81eSwdenk CFG_JFFS2_FIRST_BANK, CFG_JFFS2_NUM_BANKS 8766705d81eSwdenk Define these for a default partition on a NOR device 8776705d81eSwdenk 8786705d81eSwdenk CFG_JFFS_CUSTOM_PART 8796705d81eSwdenk Define this to create an own partition. You have to provide a 8806705d81eSwdenk function struct part_info* jffs2_part_info(int part_num) 8816705d81eSwdenk 8826705d81eSwdenk If you define only one JFFS2 partition you may also want to 8836705d81eSwdenk #define CFG_JFFS_SINGLE_PART 1 8846705d81eSwdenk to disable the command chpart. This is the default when you 8856705d81eSwdenk have not defined a custom partition 8866705d81eSwdenk 887c609719bSwdenk- Keyboard Support: 888c609719bSwdenk CONFIG_ISA_KEYBOARD 889c609719bSwdenk 890c609719bSwdenk Define this to enable standard (PC-Style) keyboard 891c609719bSwdenk support 892c609719bSwdenk 893c609719bSwdenk CONFIG_I8042_KBD 894c609719bSwdenk Standard PC keyboard driver with US (is default) and 895c609719bSwdenk GERMAN key layout (switch via environment 'keymap=de') support. 896c609719bSwdenk Export function i8042_kbd_init, i8042_tstc and i8042_getc 897c609719bSwdenk for cfb_console. Supports cursor blinking. 898c609719bSwdenk 899c609719bSwdenk- Video support: 900c609719bSwdenk CONFIG_VIDEO 901c609719bSwdenk 902c609719bSwdenk Define this to enable video support (for output to 903c609719bSwdenk video). 904c609719bSwdenk 905c609719bSwdenk CONFIG_VIDEO_CT69000 906c609719bSwdenk 907c609719bSwdenk Enable Chips & Technologies 69000 Video chip 908c609719bSwdenk 909c609719bSwdenk CONFIG_VIDEO_SMI_LYNXEM 910eeb1b77bSwdenk Enable Silicon Motion SMI 712/710/810 Video chip. The 911eeb1b77bSwdenk video output is selected via environment 'videoout' 912eeb1b77bSwdenk (1 = LCD and 2 = CRT). If videoout is undefined, CRT is 913eeb1b77bSwdenk assumed. 914c609719bSwdenk 915eeb1b77bSwdenk For the CT69000 and SMI_LYNXEM drivers, videomode is 916eeb1b77bSwdenk selected via environment 'videomode'. Two diferent ways 917eeb1b77bSwdenk are possible: 918eeb1b77bSwdenk - "videomode=num" 'num' is a standard LiLo mode numbers. 919eeb1b77bSwdenk Following standard modes are supported (* is default): 920eeb1b77bSwdenk 921eeb1b77bSwdenk Colors 640x480 800x600 1024x768 1152x864 1280x1024 922eeb1b77bSwdenk -------------+--------------------------------------------- 923eeb1b77bSwdenk 8 bits | 0x301* 0x303 0x305 0x161 0x307 924eeb1b77bSwdenk 15 bits | 0x310 0x313 0x316 0x162 0x319 925eeb1b77bSwdenk 16 bits | 0x311 0x314 0x317 0x163 0x31A 926eeb1b77bSwdenk 24 bits | 0x312 0x315 0x318 ? 0x31B 927eeb1b77bSwdenk -------------+--------------------------------------------- 928c609719bSwdenk (i.e. setenv videomode 317; saveenv; reset;) 929c609719bSwdenk 930eeb1b77bSwdenk - "videomode=bootargs" all the video parameters are parsed 931eeb1b77bSwdenk from the bootargs. (See drivers/videomodes.c) 932eeb1b77bSwdenk 933eeb1b77bSwdenk 934a6c7ad2fSwdenk CONFIG_VIDEO_SED13806 935a6c7ad2fSwdenk Enable Epson SED13806 driver. This driver supports 8bpp 936a6c7ad2fSwdenk and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP 937a6c7ad2fSwdenk or CONFIG_VIDEO_SED13806_16BPP 938a6c7ad2fSwdenk 939682011ffSwdenk- Keyboard Support: 940682011ffSwdenk CONFIG_KEYBOARD 941682011ffSwdenk 942682011ffSwdenk Define this to enable a custom keyboard support. 943682011ffSwdenk This simply calls drv_keyboard_init() which must be 944682011ffSwdenk defined in your board-specific files. 945682011ffSwdenk The only board using this so far is RBC823. 946a6c7ad2fSwdenk 947c609719bSwdenk- LCD Support: CONFIG_LCD 948c609719bSwdenk 949c609719bSwdenk Define this to enable LCD support (for output to LCD 950c609719bSwdenk display); also select one of the supported displays 951c609719bSwdenk by defining one of these: 952c609719bSwdenk 953fd3103bbSwdenk CONFIG_NEC_NL6448AC33: 954c609719bSwdenk 955fd3103bbSwdenk NEC NL6448AC33-18. Active, color, single scan. 956c609719bSwdenk 957fd3103bbSwdenk CONFIG_NEC_NL6448BC20 958c609719bSwdenk 959fd3103bbSwdenk NEC NL6448BC20-08. 6.5", 640x480. 960fd3103bbSwdenk Active, color, single scan. 961fd3103bbSwdenk 962fd3103bbSwdenk CONFIG_NEC_NL6448BC33_54 963fd3103bbSwdenk 964fd3103bbSwdenk NEC NL6448BC33-54. 10.4", 640x480. 965c609719bSwdenk Active, color, single scan. 966c609719bSwdenk 967c609719bSwdenk CONFIG_SHARP_16x9 968c609719bSwdenk 969c609719bSwdenk Sharp 320x240. Active, color, single scan. 970c609719bSwdenk It isn't 16x9, and I am not sure what it is. 971c609719bSwdenk 972c609719bSwdenk CONFIG_SHARP_LQ64D341 973c609719bSwdenk 974c609719bSwdenk Sharp LQ64D341 display, 640x480. 975c609719bSwdenk Active, color, single scan. 976c609719bSwdenk 977c609719bSwdenk CONFIG_HLD1045 978c609719bSwdenk 979c609719bSwdenk HLD1045 display, 640x480. 980c609719bSwdenk Active, color, single scan. 981c609719bSwdenk 982c609719bSwdenk CONFIG_OPTREX_BW 983c609719bSwdenk 984c609719bSwdenk Optrex CBL50840-2 NF-FW 99 22 M5 985c609719bSwdenk or 986c609719bSwdenk Hitachi LMG6912RPFC-00T 987c609719bSwdenk or 988c609719bSwdenk Hitachi SP14Q002 989c609719bSwdenk 990c609719bSwdenk 320x240. Black & white. 991c609719bSwdenk 992c609719bSwdenk Normally display is black on white background; define 993c609719bSwdenk CFG_WHITE_ON_BLACK to get it inverted. 994c609719bSwdenk 9957152b1d0Swdenk- Splash Screen Support: CONFIG_SPLASH_SCREEN 996d791b1dcSwdenk 997d791b1dcSwdenk If this option is set, the environment is checked for 998d791b1dcSwdenk a variable "splashimage". If found, the usual display 999d791b1dcSwdenk of logo, copyright and system information on the LCD 1000e94d2cd9Swdenk is suppressed and the BMP image at the address 1001d791b1dcSwdenk specified in "splashimage" is loaded instead. The 1002d791b1dcSwdenk console is redirected to the "nulldev", too. This 1003d791b1dcSwdenk allows for a "silent" boot where a splash screen is 1004d791b1dcSwdenk loaded very quickly after power-on. 1005d791b1dcSwdenk 100698f4a3dfSStefan Roese- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP 100798f4a3dfSStefan Roese 100898f4a3dfSStefan Roese If this option is set, additionally to standard BMP 100998f4a3dfSStefan Roese images, gzipped BMP images can be displayed via the 101098f4a3dfSStefan Roese splashscreen support or the bmp command. 101198f4a3dfSStefan Roese 1012c29fdfc1Swdenk- Compression support: 1013c29fdfc1Swdenk CONFIG_BZIP2 1014c29fdfc1Swdenk 1015c29fdfc1Swdenk If this option is set, support for bzip2 compressed 1016c29fdfc1Swdenk images is included. If not, only uncompressed and gzip 1017c29fdfc1Swdenk compressed images are supported. 1018c29fdfc1Swdenk 1019c29fdfc1Swdenk NOTE: the bzip2 algorithm requires a lot of RAM, so 1020c29fdfc1Swdenk the malloc area (as defined by CFG_MALLOC_LEN) should 1021c29fdfc1Swdenk be at least 4MB. 1022d791b1dcSwdenk 102317ea1177Swdenk- MII/PHY support: 102417ea1177Swdenk CONFIG_PHY_ADDR 102517ea1177Swdenk 102617ea1177Swdenk The address of PHY on MII bus. 102717ea1177Swdenk 102817ea1177Swdenk CONFIG_PHY_CLOCK_FREQ (ppc4xx) 102917ea1177Swdenk 103017ea1177Swdenk The clock frequency of the MII bus 103117ea1177Swdenk 103217ea1177Swdenk CONFIG_PHY_GIGE 103317ea1177Swdenk 103417ea1177Swdenk If this option is set, support for speed/duplex 103517ea1177Swdenk detection of Gigabit PHY is included. 103617ea1177Swdenk 103717ea1177Swdenk CONFIG_PHY_RESET_DELAY 103817ea1177Swdenk 103917ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 104017ea1177Swdenk reset before any MII register access is possible. 104117ea1177Swdenk For such PHY, set this option to the usec delay 104217ea1177Swdenk required. (minimum 300usec for LXT971A) 104317ea1177Swdenk 104417ea1177Swdenk CONFIG_PHY_CMD_DELAY (ppc4xx) 104517ea1177Swdenk 104617ea1177Swdenk Some PHY like Intel LXT971A need extra delay after 104717ea1177Swdenk command issued before MII status register can be read 104817ea1177Swdenk 1049c609719bSwdenk- Ethernet address: 1050c609719bSwdenk CONFIG_ETHADDR 1051c609719bSwdenk CONFIG_ETH2ADDR 1052c609719bSwdenk CONFIG_ETH3ADDR 1053c609719bSwdenk 1054c609719bSwdenk Define a default value for ethernet address to use 1055c609719bSwdenk for the respective ethernet interface, in case this 1056c609719bSwdenk is not determined automatically. 1057c609719bSwdenk 1058c609719bSwdenk- IP address: 1059c609719bSwdenk CONFIG_IPADDR 1060c609719bSwdenk 1061c609719bSwdenk Define a default value for the IP address to use for 1062c609719bSwdenk the default ethernet interface, in case this is not 1063c609719bSwdenk determined through e.g. bootp. 1064c609719bSwdenk 1065c609719bSwdenk- Server IP address: 1066c609719bSwdenk CONFIG_SERVERIP 1067c609719bSwdenk 1068c609719bSwdenk Defines a default value for theIP address of a TFTP 1069c609719bSwdenk server to contact when using the "tftboot" command. 1070c609719bSwdenk 107153a5c424SDavid Updegraff- Multicast TFTP Mode: 107253a5c424SDavid Updegraff CONFIG_MCAST_TFTP 107353a5c424SDavid Updegraff 107453a5c424SDavid Updegraff Defines whether you want to support multicast TFTP as per 107553a5c424SDavid Updegraff rfc-2090; for example to work with atftp. Lets lots of targets 107653a5c424SDavid Updegraff tftp down the same boot image concurrently. Note: the ethernet 107753a5c424SDavid Updegraff driver in use must provide a function: mcast() to join/leave a 107853a5c424SDavid Updegraff multicast group. 107953a5c424SDavid Updegraff 108053a5c424SDavid Updegraff CONFIG_BOOTP_RANDOM_DELAY 1081c609719bSwdenk- BOOTP Recovery Mode: 1082c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY 1083c609719bSwdenk 1084c609719bSwdenk If you have many targets in a network that try to 1085c609719bSwdenk boot using BOOTP, you may want to avoid that all 1086c609719bSwdenk systems send out BOOTP requests at precisely the same 1087c609719bSwdenk moment (which would happen for instance at recovery 1088c609719bSwdenk from a power failure, when all systems will try to 1089c609719bSwdenk boot, thus flooding the BOOTP server. Defining 1090c609719bSwdenk CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be 1091c609719bSwdenk inserted before sending out BOOTP requests. The 10926c33c785SWolfgang Denk following delays are inserted then: 1093c609719bSwdenk 1094c609719bSwdenk 1st BOOTP request: delay 0 ... 1 sec 1095c609719bSwdenk 2nd BOOTP request: delay 0 ... 2 sec 1096c609719bSwdenk 3rd BOOTP request: delay 0 ... 4 sec 1097c609719bSwdenk 4th and following 1098c609719bSwdenk BOOTP requests: delay 0 ... 8 sec 1099c609719bSwdenk 1100fe389a82Sstroese- DHCP Advanced Options: 11011fe80d79SJon Loeliger You can fine tune the DHCP functionality by defining 11021fe80d79SJon Loeliger CONFIG_BOOTP_* symbols: 1103fe389a82Sstroese 11041fe80d79SJon Loeliger CONFIG_BOOTP_SUBNETMASK 11051fe80d79SJon Loeliger CONFIG_BOOTP_GATEWAY 11061fe80d79SJon Loeliger CONFIG_BOOTP_HOSTNAME 11071fe80d79SJon Loeliger CONFIG_BOOTP_NISDOMAIN 11081fe80d79SJon Loeliger CONFIG_BOOTP_BOOTPATH 11091fe80d79SJon Loeliger CONFIG_BOOTP_BOOTFILESIZE 11101fe80d79SJon Loeliger CONFIG_BOOTP_DNS 11111fe80d79SJon Loeliger CONFIG_BOOTP_DNS2 11121fe80d79SJon Loeliger CONFIG_BOOTP_SEND_HOSTNAME 11131fe80d79SJon Loeliger CONFIG_BOOTP_NTPSERVER 11141fe80d79SJon Loeliger CONFIG_BOOTP_TIMEOFFSET 11151fe80d79SJon Loeliger CONFIG_BOOTP_VENDOREX 1116fe389a82Sstroese 11175d110f0aSWilson Callan CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip 11185d110f0aSWilson Callan environment variable, not the BOOTP server. 1119fe389a82Sstroese 1120fe389a82Sstroese CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS 1121fe389a82Sstroese serverip from a DHCP server, it is possible that more 1122fe389a82Sstroese than one DNS serverip is offered to the client. 1123fe389a82Sstroese If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS 1124fe389a82Sstroese serverip will be stored in the additional environment 1125fe389a82Sstroese variable "dnsip2". The first DNS serverip is always 1126fe389a82Sstroese stored in the variable "dnsip", when CONFIG_BOOTP_DNS 11271fe80d79SJon Loeliger is defined. 1128fe389a82Sstroese 1129fe389a82Sstroese CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable 1130fe389a82Sstroese to do a dynamic update of a DNS server. To do this, they 1131fe389a82Sstroese need the hostname of the DHCP requester. 11325d110f0aSWilson Callan If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content 11331fe80d79SJon Loeliger of the "hostname" environment variable is passed as 11341fe80d79SJon Loeliger option 12 to the DHCP server. 1135fe389a82Sstroese 1136a3d991bdSwdenk - CDP Options: 1137a3d991bdSwdenk CONFIG_CDP_DEVICE_ID 1138a3d991bdSwdenk 1139a3d991bdSwdenk The device id used in CDP trigger frames. 1140a3d991bdSwdenk 1141a3d991bdSwdenk CONFIG_CDP_DEVICE_ID_PREFIX 1142a3d991bdSwdenk 1143a3d991bdSwdenk A two character string which is prefixed to the MAC address 1144a3d991bdSwdenk of the device. 1145a3d991bdSwdenk 1146a3d991bdSwdenk CONFIG_CDP_PORT_ID 1147a3d991bdSwdenk 1148a3d991bdSwdenk A printf format string which contains the ascii name of 1149a3d991bdSwdenk the port. Normally is set to "eth%d" which sets 1150a3d991bdSwdenk eth0 for the first ethernet, eth1 for the second etc. 1151a3d991bdSwdenk 1152a3d991bdSwdenk CONFIG_CDP_CAPABILITIES 1153a3d991bdSwdenk 1154a3d991bdSwdenk A 32bit integer which indicates the device capabilities; 1155a3d991bdSwdenk 0x00000010 for a normal host which does not forwards. 1156a3d991bdSwdenk 1157a3d991bdSwdenk CONFIG_CDP_VERSION 1158a3d991bdSwdenk 1159a3d991bdSwdenk An ascii string containing the version of the software. 1160a3d991bdSwdenk 1161a3d991bdSwdenk CONFIG_CDP_PLATFORM 1162a3d991bdSwdenk 1163a3d991bdSwdenk An ascii string containing the name of the platform. 1164a3d991bdSwdenk 1165a3d991bdSwdenk CONFIG_CDP_TRIGGER 1166a3d991bdSwdenk 1167a3d991bdSwdenk A 32bit integer sent on the trigger. 1168a3d991bdSwdenk 1169a3d991bdSwdenk CONFIG_CDP_POWER_CONSUMPTION 1170a3d991bdSwdenk 1171a3d991bdSwdenk A 16bit integer containing the power consumption of the 1172a3d991bdSwdenk device in .1 of milliwatts. 1173a3d991bdSwdenk 1174a3d991bdSwdenk CONFIG_CDP_APPLIANCE_VLAN_TYPE 1175a3d991bdSwdenk 1176a3d991bdSwdenk A byte containing the id of the VLAN. 1177a3d991bdSwdenk 1178c609719bSwdenk- Status LED: CONFIG_STATUS_LED 1179c609719bSwdenk 1180c609719bSwdenk Several configurations allow to display the current 1181c609719bSwdenk status using a LED. For instance, the LED will blink 1182c609719bSwdenk fast while running U-Boot code, stop blinking as 1183c609719bSwdenk soon as a reply to a BOOTP request was received, and 1184c609719bSwdenk start blinking slow once the Linux kernel is running 1185c609719bSwdenk (supported by a status LED driver in the Linux 1186c609719bSwdenk kernel). Defining CONFIG_STATUS_LED enables this 1187c609719bSwdenk feature in U-Boot. 1188c609719bSwdenk 1189c609719bSwdenk- CAN Support: CONFIG_CAN_DRIVER 1190c609719bSwdenk 1191c609719bSwdenk Defining CONFIG_CAN_DRIVER enables CAN driver support 1192c609719bSwdenk on those systems that support this (optional) 1193c609719bSwdenk feature, like the TQM8xxL modules. 1194c609719bSwdenk 1195c609719bSwdenk- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C 1196c609719bSwdenk 1197b37c7e5eSwdenk These enable I2C serial bus commands. Defining either of 1198b37c7e5eSwdenk (but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will 1199b37c7e5eSwdenk include the appropriate I2C driver for the selected cpu. 1200c609719bSwdenk 1201b37c7e5eSwdenk This will allow you to use i2c commands at the u-boot 1202602ad3b3SJon Loeliger command line (as long as you set CONFIG_CMD_I2C in 1203b37c7e5eSwdenk CONFIG_COMMANDS) and communicate with i2c based realtime 1204b37c7e5eSwdenk clock chips. See common/cmd_i2c.c for a description of the 1205c609719bSwdenk command line interface. 1206c609719bSwdenk 1207bb99ad6dSBen Warren CONFIG_I2C_CMD_TREE is a recommended option that places 1208bb99ad6dSBen Warren all I2C commands under a single 'i2c' root command. The 1209bb99ad6dSBen Warren older 'imm', 'imd', 'iprobe' etc. commands are considered 1210bb99ad6dSBen Warren deprecated and may disappear in the future. 1211bb99ad6dSBen Warren 1212bb99ad6dSBen Warren CONFIG_HARD_I2C selects a hardware I2C controller. 1213c609719bSwdenk 1214b37c7e5eSwdenk CONFIG_SOFT_I2C configures u-boot to use a software (aka 1215b37c7e5eSwdenk bit-banging) driver instead of CPM or similar hardware 1216b37c7e5eSwdenk support for I2C. 1217c609719bSwdenk 1218b37c7e5eSwdenk There are several other quantities that must also be 1219b37c7e5eSwdenk defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C. 1220c609719bSwdenk 1221b37c7e5eSwdenk In both cases you will need to define CFG_I2C_SPEED 1222b37c7e5eSwdenk to be the frequency (in Hz) at which you wish your i2c bus 1223b37c7e5eSwdenk to run and CFG_I2C_SLAVE to be the address of this node (ie 1224b37c7e5eSwdenk the cpu's i2c node address). 1225c609719bSwdenk 1226b37c7e5eSwdenk Now, the u-boot i2c code for the mpc8xx (cpu/mpc8xx/i2c.c) 1227b37c7e5eSwdenk sets the cpu up as a master node and so its address should 1228b37c7e5eSwdenk therefore be cleared to 0 (See, eg, MPC823e User's Manual 1229b37c7e5eSwdenk p.16-473). So, set CFG_I2C_SLAVE to 0. 1230b37c7e5eSwdenk 1231b37c7e5eSwdenk That's all that's required for CONFIG_HARD_I2C. 1232b37c7e5eSwdenk 1233b37c7e5eSwdenk If you use the software i2c interface (CONFIG_SOFT_I2C) 1234b37c7e5eSwdenk then the following macros need to be defined (examples are 1235b37c7e5eSwdenk from include/configs/lwmon.h): 1236c609719bSwdenk 1237c609719bSwdenk I2C_INIT 1238c609719bSwdenk 1239b37c7e5eSwdenk (Optional). Any commands necessary to enable the I2C 1240c609719bSwdenk controller or configure ports. 1241c609719bSwdenk 1242b37c7e5eSwdenk eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) 1243b37c7e5eSwdenk 1244c609719bSwdenk I2C_PORT 1245c609719bSwdenk 1246c609719bSwdenk (Only for MPC8260 CPU). The I/O port to use (the code 1247c609719bSwdenk assumes both bits are on the same port). Valid values 1248c609719bSwdenk are 0..3 for ports A..D. 1249c609719bSwdenk 1250c609719bSwdenk I2C_ACTIVE 1251c609719bSwdenk 1252c609719bSwdenk The code necessary to make the I2C data line active 1253c609719bSwdenk (driven). If the data line is open collector, this 1254c609719bSwdenk define can be null. 1255c609719bSwdenk 1256b37c7e5eSwdenk eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) 1257b37c7e5eSwdenk 1258c609719bSwdenk I2C_TRISTATE 1259c609719bSwdenk 1260c609719bSwdenk The code necessary to make the I2C data line tri-stated 1261c609719bSwdenk (inactive). If the data line is open collector, this 1262c609719bSwdenk define can be null. 1263c609719bSwdenk 1264b37c7e5eSwdenk eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) 1265b37c7e5eSwdenk 1266c609719bSwdenk I2C_READ 1267c609719bSwdenk 1268c609719bSwdenk Code that returns TRUE if the I2C data line is high, 1269c609719bSwdenk FALSE if it is low. 1270c609719bSwdenk 1271b37c7e5eSwdenk eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) 1272b37c7e5eSwdenk 1273c609719bSwdenk I2C_SDA(bit) 1274c609719bSwdenk 1275c609719bSwdenk If <bit> is TRUE, sets the I2C data line high. If it 1276c609719bSwdenk is FALSE, it clears it (low). 1277c609719bSwdenk 1278b37c7e5eSwdenk eg: #define I2C_SDA(bit) \ 1279b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ 1280b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SDA 1281b37c7e5eSwdenk 1282c609719bSwdenk I2C_SCL(bit) 1283c609719bSwdenk 1284c609719bSwdenk If <bit> is TRUE, sets the I2C clock line high. If it 1285c609719bSwdenk is FALSE, it clears it (low). 1286c609719bSwdenk 1287b37c7e5eSwdenk eg: #define I2C_SCL(bit) \ 1288b37c7e5eSwdenk if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ 1289b37c7e5eSwdenk else immr->im_cpm.cp_pbdat &= ~PB_SCL 1290b37c7e5eSwdenk 1291c609719bSwdenk I2C_DELAY 1292c609719bSwdenk 1293c609719bSwdenk This delay is invoked four times per clock cycle so this 1294c609719bSwdenk controls the rate of data transfer. The data rate thus 1295b37c7e5eSwdenk is 1 / (I2C_DELAY * 4). Often defined to be something 1296b37c7e5eSwdenk like: 1297b37c7e5eSwdenk 1298b37c7e5eSwdenk #define I2C_DELAY udelay(2) 1299c609719bSwdenk 130047cd00faSwdenk CFG_I2C_INIT_BOARD 130147cd00faSwdenk 130247cd00faSwdenk When a board is reset during an i2c bus transfer 130347cd00faSwdenk chips might think that the current transfer is still 130447cd00faSwdenk in progress. On some boards it is possible to access 130547cd00faSwdenk the i2c SCLK line directly, either by using the 130647cd00faSwdenk processor pin as a GPIO or by having a second pin 130747cd00faSwdenk connected to the bus. If this option is defined a 130847cd00faSwdenk custom i2c_init_board() routine in boards/xxx/board.c 130947cd00faSwdenk is run early in the boot sequence. 131047cd00faSwdenk 131117ea1177Swdenk CONFIG_I2CFAST (PPC405GP|PPC405EP only) 131217ea1177Swdenk 131317ea1177Swdenk This option enables configuration of bi_iic_fast[] flags 131417ea1177Swdenk in u-boot bd_info structure based on u-boot environment 131517ea1177Swdenk variable "i2cfast". (see also i2cfast) 131617ea1177Swdenk 1317bb99ad6dSBen Warren CONFIG_I2C_MULTI_BUS 1318bb99ad6dSBen Warren 1319bb99ad6dSBen Warren This option allows the use of multiple I2C buses, each of which 1320bb99ad6dSBen Warren must have a controller. At any point in time, only one bus is 1321bb99ad6dSBen Warren active. To switch to a different bus, use the 'i2c dev' command. 1322bb99ad6dSBen Warren Note that bus numbering is zero-based. 1323bb99ad6dSBen Warren 1324bb99ad6dSBen Warren CFG_I2C_NOPROBES 1325bb99ad6dSBen Warren 1326bb99ad6dSBen Warren This option specifies a list of I2C devices that will be skipped 1327bb99ad6dSBen Warren when the 'i2c probe' command is issued (or 'iprobe' using the legacy 1328bb99ad6dSBen Warren command). If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device 1329bb99ad6dSBen Warren pairs. Otherwise, specify a 1D array of device addresses 1330bb99ad6dSBen Warren 1331bb99ad6dSBen Warren e.g. 1332bb99ad6dSBen Warren #undef CONFIG_I2C_MULTI_BUS 1333bb99ad6dSBen Warren #define CFG_I2C_NOPROBES {0x50,0x68} 1334bb99ad6dSBen Warren 1335bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on a board with one I2C bus 1336bb99ad6dSBen Warren 1337bb99ad6dSBen Warren #define CONFIG_I2C_MULTI_BUS 1338bb99ad6dSBen Warren #define CFG_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} 1339bb99ad6dSBen Warren 1340bb99ad6dSBen Warren will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 1341bb99ad6dSBen Warren 1342be5e6181STimur Tabi CFG_SPD_BUS_NUM 1343be5e6181STimur Tabi 1344be5e6181STimur Tabi If defined, then this indicates the I2C bus number for DDR SPD. 1345be5e6181STimur Tabi If not defined, then U-Boot assumes that SPD is on I2C bus 0. 1346be5e6181STimur Tabi 13470dc018ecSStefan Roese CFG_RTC_BUS_NUM 13480dc018ecSStefan Roese 13490dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the RTC. 13500dc018ecSStefan Roese If not defined, then U-Boot assumes that RTC is on I2C bus 0. 13510dc018ecSStefan Roese 13520dc018ecSStefan Roese CFG_DTT_BUS_NUM 13530dc018ecSStefan Roese 13540dc018ecSStefan Roese If defined, then this indicates the I2C bus number for the DTT. 13550dc018ecSStefan Roese If not defined, then U-Boot assumes that DTT is on I2C bus 0. 13560dc018ecSStefan Roese 1357be5e6181STimur Tabi CONFIG_FSL_I2C 1358be5e6181STimur Tabi 1359be5e6181STimur Tabi Define this option if you want to use Freescale's I2C driver in 1360be5e6181STimur Tabi drivers/fsl_i2c.c. 1361be5e6181STimur Tabi 1362be5e6181STimur Tabi 1363c609719bSwdenk- SPI Support: CONFIG_SPI 1364c609719bSwdenk 1365c609719bSwdenk Enables SPI driver (so far only tested with 1366c609719bSwdenk SPI EEPROM, also an instance works with Crystal A/D and 1367c609719bSwdenk D/As on the SACSng board) 1368c609719bSwdenk 1369c609719bSwdenk CONFIG_SPI_X 1370c609719bSwdenk 1371c609719bSwdenk Enables extended (16-bit) SPI EEPROM addressing. 1372c609719bSwdenk (symmetrical to CONFIG_I2C_X) 1373c609719bSwdenk 1374c609719bSwdenk CONFIG_SOFT_SPI 1375c609719bSwdenk 1376c609719bSwdenk Enables a software (bit-bang) SPI driver rather than 1377c609719bSwdenk using hardware support. This is a general purpose 1378c609719bSwdenk driver that only requires three general I/O port pins 1379c609719bSwdenk (two outputs, one input) to function. If this is 1380c609719bSwdenk defined, the board configuration must define several 1381c609719bSwdenk SPI configuration items (port pins to use, etc). For 1382c609719bSwdenk an example, see include/configs/sacsng.h. 1383c609719bSwdenk 1384c609719bSwdenk- FPGA Support: CONFIG_FPGA_COUNT 1385c609719bSwdenk 1386c609719bSwdenk Specify the number of FPGA devices to support. 1387c609719bSwdenk 1388c609719bSwdenk CONFIG_FPGA 1389c609719bSwdenk 1390c609719bSwdenk Used to specify the types of FPGA devices. For example, 1391c609719bSwdenk #define CONFIG_FPGA CFG_XILINX_VIRTEX2 1392c609719bSwdenk 1393c609719bSwdenk CFG_FPGA_PROG_FEEDBACK 1394c609719bSwdenk 1395c609719bSwdenk Enable printing of hash marks during FPGA configuration. 1396c609719bSwdenk 1397c609719bSwdenk CFG_FPGA_CHECK_BUSY 1398c609719bSwdenk 1399c609719bSwdenk Enable checks on FPGA configuration interface busy 1400c609719bSwdenk status by the configuration function. This option 1401c609719bSwdenk will require a board or device specific function to 1402c609719bSwdenk be written. 1403c609719bSwdenk 1404c609719bSwdenk CONFIG_FPGA_DELAY 1405c609719bSwdenk 1406c609719bSwdenk If defined, a function that provides delays in the FPGA 1407c609719bSwdenk configuration driver. 1408c609719bSwdenk 1409c609719bSwdenk CFG_FPGA_CHECK_CTRLC 1410c609719bSwdenk Allow Control-C to interrupt FPGA configuration 1411c609719bSwdenk 1412c609719bSwdenk CFG_FPGA_CHECK_ERROR 1413c609719bSwdenk 1414c609719bSwdenk Check for configuration errors during FPGA bitfile 1415c609719bSwdenk loading. For example, abort during Virtex II 1416c609719bSwdenk configuration if the INIT_B line goes low (which 1417c609719bSwdenk indicated a CRC error). 1418c609719bSwdenk 1419c609719bSwdenk CFG_FPGA_WAIT_INIT 1420c609719bSwdenk 1421c609719bSwdenk Maximum time to wait for the INIT_B line to deassert 1422c609719bSwdenk after PROB_B has been deasserted during a Virtex II 1423c609719bSwdenk FPGA configuration sequence. The default time is 500 1424c609719bSwdenk mS. 1425c609719bSwdenk 1426c609719bSwdenk CFG_FPGA_WAIT_BUSY 1427c609719bSwdenk 1428c609719bSwdenk Maximum time to wait for BUSY to deassert during 1429c609719bSwdenk Virtex II FPGA configuration. The default is 5 mS. 1430c609719bSwdenk 1431c609719bSwdenk CFG_FPGA_WAIT_CONFIG 1432c609719bSwdenk 1433c609719bSwdenk Time to wait after FPGA configuration. The default is 1434c609719bSwdenk 200 mS. 1435c609719bSwdenk 1436c609719bSwdenk- Configuration Management: 1437c609719bSwdenk CONFIG_IDENT_STRING 1438c609719bSwdenk 1439c609719bSwdenk If defined, this string will be added to the U-Boot 1440c609719bSwdenk version information (U_BOOT_VERSION) 1441c609719bSwdenk 1442c609719bSwdenk- Vendor Parameter Protection: 1443c609719bSwdenk 1444c609719bSwdenk U-Boot considers the values of the environment 1445c609719bSwdenk variables "serial#" (Board Serial Number) and 14467152b1d0Swdenk "ethaddr" (Ethernet Address) to be parameters that 1447c609719bSwdenk are set once by the board vendor / manufacturer, and 1448c609719bSwdenk protects these variables from casual modification by 1449c609719bSwdenk the user. Once set, these variables are read-only, 1450c609719bSwdenk and write or delete attempts are rejected. You can 1451c609719bSwdenk change this behviour: 1452c609719bSwdenk 1453c609719bSwdenk If CONFIG_ENV_OVERWRITE is #defined in your config 1454c609719bSwdenk file, the write protection for vendor parameters is 145547cd00faSwdenk completely disabled. Anybody can change or delete 1456c609719bSwdenk these parameters. 1457c609719bSwdenk 1458c609719bSwdenk Alternatively, if you #define _both_ CONFIG_ETHADDR 1459c609719bSwdenk _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default 1460c609719bSwdenk ethernet address is installed in the environment, 1461c609719bSwdenk which can be changed exactly ONCE by the user. [The 1462c609719bSwdenk serial# is unaffected by this, i. e. it remains 1463c609719bSwdenk read-only.] 1464c609719bSwdenk 1465c609719bSwdenk- Protected RAM: 1466c609719bSwdenk CONFIG_PRAM 1467c609719bSwdenk 1468c609719bSwdenk Define this variable to enable the reservation of 1469c609719bSwdenk "protected RAM", i. e. RAM which is not overwritten 1470c609719bSwdenk by U-Boot. Define CONFIG_PRAM to hold the number of 1471c609719bSwdenk kB you want to reserve for pRAM. You can overwrite 1472c609719bSwdenk this default value by defining an environment 1473c609719bSwdenk variable "pram" to the number of kB you want to 1474c609719bSwdenk reserve. Note that the board info structure will 1475c609719bSwdenk still show the full amount of RAM. If pRAM is 1476c609719bSwdenk reserved, a new environment variable "mem" will 1477c609719bSwdenk automatically be defined to hold the amount of 1478c609719bSwdenk remaining RAM in a form that can be passed as boot 1479c609719bSwdenk argument to Linux, for instance like that: 1480c609719bSwdenk 1481fe126d8bSWolfgang Denk setenv bootargs ... mem=\${mem} 1482c609719bSwdenk saveenv 1483c609719bSwdenk 1484c609719bSwdenk This way you can tell Linux not to use this memory, 1485c609719bSwdenk either, which results in a memory region that will 1486c609719bSwdenk not be affected by reboots. 1487c609719bSwdenk 1488c609719bSwdenk *WARNING* If your board configuration uses automatic 1489c609719bSwdenk detection of the RAM size, you must make sure that 1490c609719bSwdenk this memory test is non-destructive. So far, the 1491c609719bSwdenk following board configurations are known to be 1492c609719bSwdenk "pRAM-clean": 1493c609719bSwdenk 1494c609719bSwdenk ETX094, IVMS8, IVML24, SPD8xx, TQM8xxL, 1495c609719bSwdenk HERMES, IP860, RPXlite, LWMON, LANTEC, 1496c609719bSwdenk PCU_E, FLAGADM, TQM8260 1497c609719bSwdenk 1498c609719bSwdenk- Error Recovery: 1499c609719bSwdenk CONFIG_PANIC_HANG 1500c609719bSwdenk 1501c609719bSwdenk Define this variable to stop the system in case of a 1502c609719bSwdenk fatal error, so that you have to reset it manually. 1503c609719bSwdenk This is probably NOT a good idea for an embedded 1504c609719bSwdenk system where you want to system to reboot 1505c609719bSwdenk automatically as fast as possible, but it may be 1506c609719bSwdenk useful during development since you can try to debug 1507c609719bSwdenk the conditions that lead to the situation. 1508c609719bSwdenk 1509c609719bSwdenk CONFIG_NET_RETRY_COUNT 1510c609719bSwdenk 1511c609719bSwdenk This variable defines the number of retries for 1512c609719bSwdenk network operations like ARP, RARP, TFTP, or BOOTP 1513c609719bSwdenk before giving up the operation. If not defined, a 1514c609719bSwdenk default value of 5 is used. 1515c609719bSwdenk 1516c609719bSwdenk- Command Interpreter: 15178078f1a5SWolfgang Denk CONFIG_AUTO_COMPLETE 151804a85b3bSwdenk 151904a85b3bSwdenk Enable auto completion of commands using TAB. 152004a85b3bSwdenk 15218078f1a5SWolfgang Denk Note that this feature has NOT been implemented yet 15228078f1a5SWolfgang Denk for the "hush" shell. 15238078f1a5SWolfgang Denk 15248078f1a5SWolfgang Denk 1525c609719bSwdenk CFG_HUSH_PARSER 1526c609719bSwdenk 1527c609719bSwdenk Define this variable to enable the "hush" shell (from 1528c609719bSwdenk Busybox) as command line interpreter, thus enabling 1529c609719bSwdenk powerful command line syntax like 1530c609719bSwdenk if...then...else...fi conditionals or `&&' and '||' 1531c609719bSwdenk constructs ("shell scripts"). 1532c609719bSwdenk 1533c609719bSwdenk If undefined, you get the old, much simpler behaviour 1534c609719bSwdenk with a somewhat smaller memory footprint. 1535c609719bSwdenk 1536c609719bSwdenk 1537c609719bSwdenk CFG_PROMPT_HUSH_PS2 1538c609719bSwdenk 1539c609719bSwdenk This defines the secondary prompt string, which is 1540c609719bSwdenk printed when the command interpreter needs more input 1541c609719bSwdenk to complete a command. Usually "> ". 1542c609719bSwdenk 1543c609719bSwdenk Note: 1544c609719bSwdenk 1545c609719bSwdenk In the current implementation, the local variables 1546c609719bSwdenk space and global environment variables space are 1547c609719bSwdenk separated. Local variables are those you define by 15483b57fe0aSwdenk simply typing `name=value'. To access a local 1549c609719bSwdenk variable later on, you have write `$name' or 15503b57fe0aSwdenk `${name}'; to execute the contents of a variable 15513b57fe0aSwdenk directly type `$name' at the command prompt. 1552c609719bSwdenk 1553c609719bSwdenk Global environment variables are those you use 1554c609719bSwdenk setenv/printenv to work with. To run a command stored 1555c609719bSwdenk in such a variable, you need to use the run command, 1556c609719bSwdenk and you must not use the '$' sign to access them. 1557c609719bSwdenk 1558c609719bSwdenk To store commands and special characters in a 1559c609719bSwdenk variable, please use double quotation marks 1560c609719bSwdenk surrounding the whole text of the variable, instead 1561c609719bSwdenk of the backslashes before semicolons and special 1562c609719bSwdenk symbols. 1563c609719bSwdenk 1564aa0c71acSWolfgang Denk- Commandline Editing and History: 1565aa0c71acSWolfgang Denk CONFIG_CMDLINE_EDITING 1566aa0c71acSWolfgang Denk 1567aa0c71acSWolfgang Denk Enable editiong and History functions for interactive 1568aa0c71acSWolfgang Denk commandline input operations 1569aa0c71acSWolfgang Denk 1570a8c7c708Swdenk- Default Environment: 1571c609719bSwdenk CONFIG_EXTRA_ENV_SETTINGS 1572c609719bSwdenk 1573c609719bSwdenk Define this to contain any number of null terminated 1574c609719bSwdenk strings (variable = value pairs) that will be part of 15757152b1d0Swdenk the default environment compiled into the boot image. 15762262cfeeSwdenk 1577c609719bSwdenk For example, place something like this in your 1578c609719bSwdenk board's config file: 1579c609719bSwdenk 1580c609719bSwdenk #define CONFIG_EXTRA_ENV_SETTINGS \ 1581c609719bSwdenk "myvar1=value1\0" \ 1582c609719bSwdenk "myvar2=value2\0" 1583c609719bSwdenk 1584c609719bSwdenk Warning: This method is based on knowledge about the 1585c609719bSwdenk internal format how the environment is stored by the 15862262cfeeSwdenk U-Boot code. This is NOT an official, exported 1587c609719bSwdenk interface! Although it is unlikely that this format 15887152b1d0Swdenk will change soon, there is no guarantee either. 1589c609719bSwdenk You better know what you are doing here. 1590c609719bSwdenk 1591c609719bSwdenk Note: overly (ab)use of the default environment is 1592c609719bSwdenk discouraged. Make sure to check other ways to preset 1593c609719bSwdenk the environment like the autoscript function or the 1594c609719bSwdenk boot command first. 1595c609719bSwdenk 1596a8c7c708Swdenk- DataFlash Support: 15972abbe075Swdenk CONFIG_HAS_DATAFLASH 15982abbe075Swdenk 15992abbe075Swdenk Defining this option enables DataFlash features and 16002abbe075Swdenk allows to read/write in Dataflash via the standard 16012abbe075Swdenk commands cp, md... 16022abbe075Swdenk 16033f85ce27Swdenk- SystemACE Support: 16043f85ce27Swdenk CONFIG_SYSTEMACE 16053f85ce27Swdenk 16063f85ce27Swdenk Adding this option adds support for Xilinx SystemACE 16073f85ce27Swdenk chips attached via some sort of local bus. The address 16083f85ce27Swdenk of the chip must alsh be defined in the 16093f85ce27Swdenk CFG_SYSTEMACE_BASE macro. For example: 16103f85ce27Swdenk 16113f85ce27Swdenk #define CONFIG_SYSTEMACE 16123f85ce27Swdenk #define CFG_SYSTEMACE_BASE 0xf0000000 16133f85ce27Swdenk 16143f85ce27Swdenk When SystemACE support is added, the "ace" device type 16153f85ce27Swdenk becomes available to the fat commands, i.e. fatls. 16163f85ce27Swdenk 1617ecb0ccd9SWolfgang Denk- TFTP Fixed UDP Port: 1618ecb0ccd9SWolfgang Denk CONFIG_TFTP_PORT 1619ecb0ccd9SWolfgang Denk 162028cb9375SWolfgang Denk If this is defined, the environment variable tftpsrcp 1621ecb0ccd9SWolfgang Denk is used to supply the TFTP UDP source port value. 162228cb9375SWolfgang Denk If tftpsrcp isn't defined, the normal pseudo-random port 1623ecb0ccd9SWolfgang Denk number generator is used. 1624ecb0ccd9SWolfgang Denk 162528cb9375SWolfgang Denk Also, the environment variable tftpdstp is used to supply 162628cb9375SWolfgang Denk the TFTP UDP destination port value. If tftpdstp isn't 162728cb9375SWolfgang Denk defined, the normal port 69 is used. 162828cb9375SWolfgang Denk 162928cb9375SWolfgang Denk The purpose for tftpsrcp is to allow a TFTP server to 1630ecb0ccd9SWolfgang Denk blindly start the TFTP transfer using the pre-configured 1631ecb0ccd9SWolfgang Denk target IP address and UDP port. This has the effect of 1632ecb0ccd9SWolfgang Denk "punching through" the (Windows XP) firewall, allowing 1633ecb0ccd9SWolfgang Denk the remainder of the TFTP transfer to proceed normally. 1634ecb0ccd9SWolfgang Denk A better solution is to properly configure the firewall, 1635ecb0ccd9SWolfgang Denk but sometimes that is not allowed. 1636ecb0ccd9SWolfgang Denk 1637a8c7c708Swdenk- Show boot progress: 1638c609719bSwdenk CONFIG_SHOW_BOOT_PROGRESS 1639c609719bSwdenk 1640c609719bSwdenk Defining this option allows to add some board- 1641c609719bSwdenk specific code (calling a user-provided function 1642c609719bSwdenk "show_boot_progress(int)") that enables you to show 1643c609719bSwdenk the system's boot progress on some display (for 1644c609719bSwdenk example, some LED's) on your board. At the moment, 1645c609719bSwdenk the following checkpoints are implemented: 1646c609719bSwdenk 1647c609719bSwdenk Arg Where When 1648c609719bSwdenk 1 common/cmd_bootm.c before attempting to boot an image 1649c609719bSwdenk -1 common/cmd_bootm.c Image header has bad magic number 1650c609719bSwdenk 2 common/cmd_bootm.c Image header has correct magic number 1651c609719bSwdenk -2 common/cmd_bootm.c Image header has bad checksum 1652c609719bSwdenk 3 common/cmd_bootm.c Image header has correct checksum 1653c609719bSwdenk -3 common/cmd_bootm.c Image data has bad checksum 1654c609719bSwdenk 4 common/cmd_bootm.c Image data has correct checksum 1655c609719bSwdenk -4 common/cmd_bootm.c Image is for unsupported architecture 1656c609719bSwdenk 5 common/cmd_bootm.c Architecture check OK 1657c609719bSwdenk -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi, standalone) 1658c609719bSwdenk 6 common/cmd_bootm.c Image Type check OK 1659c609719bSwdenk -6 common/cmd_bootm.c gunzip uncompression error 1660c609719bSwdenk -7 common/cmd_bootm.c Unimplemented compression type 1661c609719bSwdenk 7 common/cmd_bootm.c Uncompression OK 1662c609719bSwdenk -8 common/cmd_bootm.c Wrong Image Type (not kernel, multi, standalone) 1663c609719bSwdenk 8 common/cmd_bootm.c Image Type check OK 1664c609719bSwdenk -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) 1665c609719bSwdenk 9 common/cmd_bootm.c Start initial ramdisk verification 1666c609719bSwdenk -10 common/cmd_bootm.c Ramdisk header has bad magic number 1667c609719bSwdenk -11 common/cmd_bootm.c Ramdisk header has bad checksum 1668c609719bSwdenk 10 common/cmd_bootm.c Ramdisk header is OK 1669c609719bSwdenk -12 common/cmd_bootm.c Ramdisk data has bad checksum 1670c609719bSwdenk 11 common/cmd_bootm.c Ramdisk data has correct checksum 1671c609719bSwdenk 12 common/cmd_bootm.c Ramdisk verification complete, start loading 1672c609719bSwdenk -13 common/cmd_bootm.c Wrong Image Type (not PPC Linux Ramdisk) 1673c609719bSwdenk 13 common/cmd_bootm.c Start multifile image verification 1674c609719bSwdenk 14 common/cmd_bootm.c No initial ramdisk, no multifile, continue. 1675c609719bSwdenk 15 common/cmd_bootm.c All preparation done, transferring control to OS 1676c609719bSwdenk 167763e73c9aSwdenk -30 lib_ppc/board.c Fatal error, hang the system 167863e73c9aSwdenk -31 post/post.c POST test failed, detected by post_output_backlog() 167963e73c9aSwdenk -32 post/post.c POST test failed, detected by post_run_single() 168063e73c9aSwdenk 1681566a494fSHeiko Schocher 34 common/cmd_doc.c before loading a Image from a DOC device 1682566a494fSHeiko Schocher -35 common/cmd_doc.c Bad usage of "doc" command 1683566a494fSHeiko Schocher 35 common/cmd_doc.c correct usage of "doc" command 1684566a494fSHeiko Schocher -36 common/cmd_doc.c No boot device 1685566a494fSHeiko Schocher 36 common/cmd_doc.c correct boot device 1686566a494fSHeiko Schocher -37 common/cmd_doc.c Unknown Chip ID on boot device 1687566a494fSHeiko Schocher 37 common/cmd_doc.c correct chip ID found, device available 1688566a494fSHeiko Schocher -38 common/cmd_doc.c Read Error on boot device 1689566a494fSHeiko Schocher 38 common/cmd_doc.c reading Image header from DOC device OK 1690566a494fSHeiko Schocher -39 common/cmd_doc.c Image header has bad magic number 1691566a494fSHeiko Schocher 39 common/cmd_doc.c Image header has correct magic number 1692566a494fSHeiko Schocher -40 common/cmd_doc.c Error reading Image from DOC device 1693566a494fSHeiko Schocher 40 common/cmd_doc.c Image header has correct magic number 1694566a494fSHeiko Schocher 41 common/cmd_ide.c before loading a Image from a IDE device 1695566a494fSHeiko Schocher -42 common/cmd_ide.c Bad usage of "ide" command 1696566a494fSHeiko Schocher 42 common/cmd_ide.c correct usage of "ide" command 1697566a494fSHeiko Schocher -43 common/cmd_ide.c No boot device 1698566a494fSHeiko Schocher 43 common/cmd_ide.c boot device found 1699566a494fSHeiko Schocher -44 common/cmd_ide.c Device not available 1700566a494fSHeiko Schocher 44 common/cmd_ide.c Device available 1701566a494fSHeiko Schocher -45 common/cmd_ide.c wrong partition selected 1702566a494fSHeiko Schocher 45 common/cmd_ide.c partition selected 1703566a494fSHeiko Schocher -46 common/cmd_ide.c Unknown partition table 1704566a494fSHeiko Schocher 46 common/cmd_ide.c valid partition table found 1705566a494fSHeiko Schocher -47 common/cmd_ide.c Invalid partition type 1706566a494fSHeiko Schocher 47 common/cmd_ide.c correct partition type 1707566a494fSHeiko Schocher -48 common/cmd_ide.c Error reading Image Header on boot device 1708566a494fSHeiko Schocher 48 common/cmd_ide.c reading Image Header from IDE device OK 1709566a494fSHeiko Schocher -49 common/cmd_ide.c Image header has bad magic number 1710566a494fSHeiko Schocher 49 common/cmd_ide.c Image header has correct magic number 1711566a494fSHeiko Schocher -50 common/cmd_ide.c Image header has bad checksum 1712566a494fSHeiko Schocher 50 common/cmd_ide.c Image header has correct checksum 1713566a494fSHeiko Schocher -51 common/cmd_ide.c Error reading Image from IDE device 1714566a494fSHeiko Schocher 51 common/cmd_ide.c reading Image from IDE device OK 1715566a494fSHeiko Schocher 52 common/cmd_nand.c before loading a Image from a NAND device 1716566a494fSHeiko Schocher -53 common/cmd_nand.c Bad usage of "nand" command 1717566a494fSHeiko Schocher 53 common/cmd_nand.c correct usage of "nand" command 1718566a494fSHeiko Schocher -54 common/cmd_nand.c No boot device 1719566a494fSHeiko Schocher 54 common/cmd_nand.c boot device found 1720566a494fSHeiko Schocher -55 common/cmd_nand.c Unknown Chip ID on boot device 1721566a494fSHeiko Schocher 55 common/cmd_nand.c correct chip ID found, device available 1722566a494fSHeiko Schocher -56 common/cmd_nand.c Error reading Image Header on boot device 1723566a494fSHeiko Schocher 56 common/cmd_nand.c reading Image Header from NAND device OK 1724566a494fSHeiko Schocher -57 common/cmd_nand.c Image header has bad magic number 1725566a494fSHeiko Schocher 57 common/cmd_nand.c Image header has correct magic number 1726566a494fSHeiko Schocher -58 common/cmd_nand.c Error reading Image from NAND device 1727566a494fSHeiko Schocher 58 common/cmd_nand.c reading Image from NAND device OK 1728c609719bSwdenk 1729566a494fSHeiko Schocher -60 common/env_common.c Environment has a bad CRC, using default 1730c609719bSwdenk 1731566a494fSHeiko Schocher 64 net/eth.c starting with Ethernetconfiguration. 1732566a494fSHeiko Schocher -64 net/eth.c no Ethernet found. 1733566a494fSHeiko Schocher 65 net/eth.c Ethernet found. 1734206c60cbSwdenk 1735566a494fSHeiko Schocher -80 common/cmd_net.c usage wrong 1736566a494fSHeiko Schocher 80 common/cmd_net.c before calling NetLoop() 1737566a494fSHeiko Schocher -81 common/cmd_net.c some error in NetLoop() occured 1738566a494fSHeiko Schocher 81 common/cmd_net.c NetLoop() back without error 1739566a494fSHeiko Schocher -82 common/cmd_net.c size == 0 (File with size 0 loaded) 1740566a494fSHeiko Schocher 82 common/cmd_net.c trying automatic boot 1741566a494fSHeiko Schocher 83 common/cmd_net.c running autoscript 1742566a494fSHeiko Schocher -83 common/cmd_net.c some error in automatic boot or autoscript 1743566a494fSHeiko Schocher 84 common/cmd_net.c end without errors 1744c609719bSwdenk 1745c609719bSwdenkModem Support: 1746c609719bSwdenk-------------- 1747c609719bSwdenk 174885ec0bccSwdenk[so far only for SMDK2400 and TRAB boards] 1749c609719bSwdenk 1750c609719bSwdenk- Modem support endable: 1751c609719bSwdenk CONFIG_MODEM_SUPPORT 1752c609719bSwdenk 1753c609719bSwdenk- RTS/CTS Flow control enable: 1754c609719bSwdenk CONFIG_HWFLOW 1755c609719bSwdenk 1756c609719bSwdenk- Modem debug support: 1757c609719bSwdenk CONFIG_MODEM_SUPPORT_DEBUG 1758c609719bSwdenk 1759c609719bSwdenk Enables debugging stuff (char screen[1024], dbg()) 1760c609719bSwdenk for modem support. Useful only with BDI2000. 1761c609719bSwdenk 1762a8c7c708Swdenk- Interrupt support (PPC): 1763a8c7c708Swdenk 1764a8c7c708Swdenk There are common interrupt_init() and timer_interrupt() 1765a8c7c708Swdenk for all PPC archs. interrupt_init() calls interrupt_init_cpu() 1766a8c7c708Swdenk for cpu specific initialization. interrupt_init_cpu() 1767a8c7c708Swdenk should set decrementer_count to appropriate value. If 1768a8c7c708Swdenk cpu resets decrementer automatically after interrupt 1769a8c7c708Swdenk (ppc4xx) it should set decrementer_count to zero. 1770a8c7c708Swdenk timer_interrupt() calls timer_interrupt_cpu() for cpu 1771a8c7c708Swdenk specific handling. If board has watchdog / status_led 1772a8c7c708Swdenk / other_activity_monitor it works automatically from 1773a8c7c708Swdenk general timer_interrupt(). 1774a8c7c708Swdenk 1775c609719bSwdenk- General: 1776c609719bSwdenk 1777c609719bSwdenk In the target system modem support is enabled when a 1778c609719bSwdenk specific key (key combination) is pressed during 1779c609719bSwdenk power-on. Otherwise U-Boot will boot normally 1780c609719bSwdenk (autoboot). The key_pressed() fuction is called from 1781c609719bSwdenk board_init(). Currently key_pressed() is a dummy 1782c609719bSwdenk function, returning 1 and thus enabling modem 1783c609719bSwdenk initialization. 1784c609719bSwdenk 1785c609719bSwdenk If there are no modem init strings in the 1786c609719bSwdenk environment, U-Boot proceed to autoboot; the 1787c609719bSwdenk previous output (banner, info printfs) will be 1788c609719bSwdenk supressed, though. 1789c609719bSwdenk 1790c609719bSwdenk See also: doc/README.Modem 1791c609719bSwdenk 1792c609719bSwdenk 1793c609719bSwdenkConfiguration Settings: 1794c609719bSwdenk----------------------- 1795c609719bSwdenk 1796c609719bSwdenk- CFG_LONGHELP: Defined when you want long help messages included; 1797c609719bSwdenk undefine this when you're short of memory. 1798c609719bSwdenk 1799c609719bSwdenk- CFG_PROMPT: This is what U-Boot prints on the console to 1800c609719bSwdenk prompt for user input. 1801c609719bSwdenk 1802c609719bSwdenk- CFG_CBSIZE: Buffer size for input from the Console 1803c609719bSwdenk 1804c609719bSwdenk- CFG_PBSIZE: Buffer size for Console output 1805c609719bSwdenk 1806c609719bSwdenk- CFG_MAXARGS: max. Number of arguments accepted for monitor commands 1807c609719bSwdenk 1808c609719bSwdenk- CFG_BARGSIZE: Buffer size for Boot Arguments which are passed to 1809c609719bSwdenk the application (usually a Linux kernel) when it is 1810c609719bSwdenk booted 1811c609719bSwdenk 1812c609719bSwdenk- CFG_BAUDRATE_TABLE: 1813c609719bSwdenk List of legal baudrate settings for this board. 1814c609719bSwdenk 1815c609719bSwdenk- CFG_CONSOLE_INFO_QUIET 1816c609719bSwdenk Suppress display of console information at boot. 1817c609719bSwdenk 1818c609719bSwdenk- CFG_CONSOLE_IS_IN_ENV 1819c609719bSwdenk If the board specific function 1820c609719bSwdenk extern int overwrite_console (void); 1821c609719bSwdenk returns 1, the stdin, stderr and stdout are switched to the 1822c609719bSwdenk serial port, else the settings in the environment are used. 1823c609719bSwdenk 1824c609719bSwdenk- CFG_CONSOLE_OVERWRITE_ROUTINE 1825c609719bSwdenk Enable the call to overwrite_console(). 1826c609719bSwdenk 1827c609719bSwdenk- CFG_CONSOLE_ENV_OVERWRITE 1828c609719bSwdenk Enable overwrite of previous console environment settings. 1829c609719bSwdenk 1830c609719bSwdenk- CFG_MEMTEST_START, CFG_MEMTEST_END: 1831c609719bSwdenk Begin and End addresses of the area used by the 1832c609719bSwdenk simple memory test. 1833c609719bSwdenk 1834c609719bSwdenk- CFG_ALT_MEMTEST: 1835c609719bSwdenk Enable an alternate, more extensive memory test. 1836c609719bSwdenk 18375f535fe1Swdenk- CFG_MEMTEST_SCRATCH: 18385f535fe1Swdenk Scratch address used by the alternate memory test 18395f535fe1Swdenk You only need to set this if address zero isn't writeable 18405f535fe1Swdenk 1841c609719bSwdenk- CFG_TFTP_LOADADDR: 1842c609719bSwdenk Default load address for network file downloads 1843c609719bSwdenk 1844c609719bSwdenk- CFG_LOADS_BAUD_CHANGE: 1845c609719bSwdenk Enable temporary baudrate change while serial download 1846c609719bSwdenk 1847c609719bSwdenk- CFG_SDRAM_BASE: 1848c609719bSwdenk Physical start address of SDRAM. _Must_ be 0 here. 1849c609719bSwdenk 1850c609719bSwdenk- CFG_MBIO_BASE: 1851c609719bSwdenk Physical start address of Motherboard I/O (if using a 1852c609719bSwdenk Cogent motherboard) 1853c609719bSwdenk 1854c609719bSwdenk- CFG_FLASH_BASE: 1855c609719bSwdenk Physical start address of Flash memory. 1856c609719bSwdenk 1857c609719bSwdenk- CFG_MONITOR_BASE: 1858c609719bSwdenk Physical start address of boot monitor code (set by 1859c609719bSwdenk make config files to be same as the text base address 1860c609719bSwdenk (TEXT_BASE) used when linking) - same as 1861c609719bSwdenk CFG_FLASH_BASE when booting from flash. 1862c609719bSwdenk 1863c609719bSwdenk- CFG_MONITOR_LEN: 18643b57fe0aSwdenk Size of memory reserved for monitor code, used to 18653b57fe0aSwdenk determine _at_compile_time_ (!) if the environment is 18663b57fe0aSwdenk embedded within the U-Boot image, or in a separate 18673b57fe0aSwdenk flash sector. 1868c609719bSwdenk 1869c609719bSwdenk- CFG_MALLOC_LEN: 1870c609719bSwdenk Size of DRAM reserved for malloc() use. 1871c609719bSwdenk 187215940c9aSStefan Roese- CFG_BOOTM_LEN: 187315940c9aSStefan Roese Normally compressed uImages are limited to an 187415940c9aSStefan Roese uncompressed size of 8 MBytes. If this is not enough, 187515940c9aSStefan Roese you can define CFG_BOOTM_LEN in your board config file 187615940c9aSStefan Roese to adjust this setting to your needs. 1877c609719bSwdenk 1878c609719bSwdenk- CFG_BOOTMAPSZ: 1879c609719bSwdenk Maximum size of memory mapped by the startup code of 1880c609719bSwdenk the Linux kernel; all data that must be processed by 1881c609719bSwdenk the Linux kernel (bd_info, boot arguments, eventually 1882c609719bSwdenk initrd image) must be put below this limit. 1883c609719bSwdenk 1884c609719bSwdenk- CFG_MAX_FLASH_BANKS: 1885c609719bSwdenk Max number of Flash memory banks 1886c609719bSwdenk 1887c609719bSwdenk- CFG_MAX_FLASH_SECT: 1888c609719bSwdenk Max number of sectors on a Flash chip 1889c609719bSwdenk 1890c609719bSwdenk- CFG_FLASH_ERASE_TOUT: 1891c609719bSwdenk Timeout for Flash erase operations (in ms) 1892c609719bSwdenk 1893c609719bSwdenk- CFG_FLASH_WRITE_TOUT: 1894c609719bSwdenk Timeout for Flash write operations (in ms) 1895c609719bSwdenk 18968564acf9Swdenk- CFG_FLASH_LOCK_TOUT 18978564acf9Swdenk Timeout for Flash set sector lock bit operation (in ms) 18988564acf9Swdenk 18998564acf9Swdenk- CFG_FLASH_UNLOCK_TOUT 19008564acf9Swdenk Timeout for Flash clear lock bits operation (in ms) 19018564acf9Swdenk 19028564acf9Swdenk- CFG_FLASH_PROTECTION 19038564acf9Swdenk If defined, hardware flash sectors protection is used 19048564acf9Swdenk instead of U-Boot software protection. 19058564acf9Swdenk 1906c609719bSwdenk- CFG_DIRECT_FLASH_TFTP: 1907c609719bSwdenk 1908c609719bSwdenk Enable TFTP transfers directly to flash memory; 1909c609719bSwdenk without this option such a download has to be 1910c609719bSwdenk performed in two steps: (1) download to RAM, and (2) 1911c609719bSwdenk copy from RAM to flash. 1912c609719bSwdenk 1913c609719bSwdenk The two-step approach is usually more reliable, since 1914c609719bSwdenk you can check if the download worked before you erase 1915c609719bSwdenk the flash, but in some situations (when sytem RAM is 1916c609719bSwdenk too limited to allow for a tempory copy of the 1917c609719bSwdenk downloaded image) this option may be very useful. 1918c609719bSwdenk 1919c609719bSwdenk- CFG_FLASH_CFI: 1920c609719bSwdenk Define if the flash driver uses extra elements in the 19215653fc33Swdenk common flash structure for storing flash geometry. 19225653fc33Swdenk 19235653fc33Swdenk- CFG_FLASH_CFI_DRIVER 19245653fc33Swdenk This option also enables the building of the cfi_flash driver 19255653fc33Swdenk in the drivers directory 192653cf9435Sstroese 19275568e613SStefan Roese- CFG_FLASH_QUIET_TEST 19285568e613SStefan Roese If this option is defined, the common CFI flash doesn't 19295568e613SStefan Roese print it's warning upon not recognized FLASH banks. This 19305568e613SStefan Roese is useful, if some of the configured banks are only 19315568e613SStefan Roese optionally available. 19325568e613SStefan Roese 193353cf9435Sstroese- CFG_RX_ETH_BUFFER: 193453cf9435Sstroese Defines the number of ethernet receive buffers. On some 193553cf9435Sstroese ethernet controllers it is recommended to set this value 193653cf9435Sstroese to 8 or even higher (EEPRO100 or 405 EMAC), since all 193753cf9435Sstroese buffers can be full shortly after enabling the interface 193853cf9435Sstroese on high ethernet traffic. 193953cf9435Sstroese Defaults to 4 if not defined. 1940c609719bSwdenk 1941c609719bSwdenkThe following definitions that deal with the placement and management 1942c609719bSwdenkof environment data (variable area); in general, we support the 1943c609719bSwdenkfollowing configurations: 1944c609719bSwdenk 1945c609719bSwdenk- CFG_ENV_IS_IN_FLASH: 1946c609719bSwdenk 1947c609719bSwdenk Define this if the environment is in flash memory. 1948c609719bSwdenk 1949c609719bSwdenk a) The environment occupies one whole flash sector, which is 1950c609719bSwdenk "embedded" in the text segment with the U-Boot code. This 1951c609719bSwdenk happens usually with "bottom boot sector" or "top boot 1952c609719bSwdenk sector" type flash chips, which have several smaller 1953c609719bSwdenk sectors at the start or the end. For instance, such a 1954c609719bSwdenk layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In 1955c609719bSwdenk such a case you would place the environment in one of the 1956c609719bSwdenk 4 kB sectors - with U-Boot code before and after it. With 1957c609719bSwdenk "top boot sector" type flash chips, you would put the 1958c609719bSwdenk environment in one of the last sectors, leaving a gap 1959c609719bSwdenk between U-Boot and the environment. 1960c609719bSwdenk 1961c609719bSwdenk - CFG_ENV_OFFSET: 1962c609719bSwdenk 1963c609719bSwdenk Offset of environment data (variable area) to the 1964c609719bSwdenk beginning of flash memory; for instance, with bottom boot 1965c609719bSwdenk type flash chips the second sector can be used: the offset 1966c609719bSwdenk for this sector is given here. 1967c609719bSwdenk 1968c609719bSwdenk CFG_ENV_OFFSET is used relative to CFG_FLASH_BASE. 1969c609719bSwdenk 1970c609719bSwdenk - CFG_ENV_ADDR: 1971c609719bSwdenk 1972c609719bSwdenk This is just another way to specify the start address of 1973c609719bSwdenk the flash sector containing the environment (instead of 1974c609719bSwdenk CFG_ENV_OFFSET). 1975c609719bSwdenk 1976c609719bSwdenk - CFG_ENV_SECT_SIZE: 1977c609719bSwdenk 1978c609719bSwdenk Size of the sector containing the environment. 1979c609719bSwdenk 1980c609719bSwdenk 1981c609719bSwdenk b) Sometimes flash chips have few, equal sized, BIG sectors. 1982c609719bSwdenk In such a case you don't want to spend a whole sector for 1983c609719bSwdenk the environment. 1984c609719bSwdenk 1985c609719bSwdenk - CFG_ENV_SIZE: 1986c609719bSwdenk 1987c609719bSwdenk If you use this in combination with CFG_ENV_IS_IN_FLASH 1988c609719bSwdenk and CFG_ENV_SECT_SIZE, you can specify to use only a part 1989c609719bSwdenk of this flash sector for the environment. This saves 1990c609719bSwdenk memory for the RAM copy of the environment. 1991c609719bSwdenk 1992c609719bSwdenk It may also save flash memory if you decide to use this 1993c609719bSwdenk when your environment is "embedded" within U-Boot code, 1994c609719bSwdenk since then the remainder of the flash sector could be used 1995c609719bSwdenk for U-Boot code. It should be pointed out that this is 1996c609719bSwdenk STRONGLY DISCOURAGED from a robustness point of view: 1997c609719bSwdenk updating the environment in flash makes it always 1998c609719bSwdenk necessary to erase the WHOLE sector. If something goes 1999c609719bSwdenk wrong before the contents has been restored from a copy in 2000c609719bSwdenk RAM, your target system will be dead. 2001c609719bSwdenk 2002c609719bSwdenk - CFG_ENV_ADDR_REDUND 2003c609719bSwdenk CFG_ENV_SIZE_REDUND 2004c609719bSwdenk 2005c609719bSwdenk These settings describe a second storage area used to hold 2006c609719bSwdenk a redundand copy of the environment data, so that there is 20073e38691eSwdenk a valid backup copy in case there is a power failure during 2008c609719bSwdenk a "saveenv" operation. 2009c609719bSwdenk 2010c609719bSwdenkBE CAREFUL! Any changes to the flash layout, and some changes to the 2011c609719bSwdenksource code will make it necessary to adapt <board>/u-boot.lds* 2012c609719bSwdenkaccordingly! 2013c609719bSwdenk 2014c609719bSwdenk 2015c609719bSwdenk- CFG_ENV_IS_IN_NVRAM: 2016c609719bSwdenk 2017c609719bSwdenk Define this if you have some non-volatile memory device 2018c609719bSwdenk (NVRAM, battery buffered SRAM) which you want to use for the 2019c609719bSwdenk environment. 2020c609719bSwdenk 2021c609719bSwdenk - CFG_ENV_ADDR: 2022c609719bSwdenk - CFG_ENV_SIZE: 2023c609719bSwdenk 2024c609719bSwdenk These two #defines are used to determin the memory area you 2025c609719bSwdenk want to use for environment. It is assumed that this memory 2026c609719bSwdenk can just be read and written to, without any special 2027c609719bSwdenk provision. 2028c609719bSwdenk 2029c609719bSwdenkBE CAREFUL! The first access to the environment happens quite early 2030c609719bSwdenkin U-Boot initalization (when we try to get the setting of for the 2031c609719bSwdenkconsole baudrate). You *MUST* have mappend your NVRAM area then, or 2032c609719bSwdenkU-Boot will hang. 2033c609719bSwdenk 2034c609719bSwdenkPlease note that even with NVRAM we still use a copy of the 2035c609719bSwdenkenvironment in RAM: we could work on NVRAM directly, but we want to 2036c609719bSwdenkkeep settings there always unmodified except somebody uses "saveenv" 2037c609719bSwdenkto save the current settings. 2038c609719bSwdenk 2039c609719bSwdenk 2040c609719bSwdenk- CFG_ENV_IS_IN_EEPROM: 2041c609719bSwdenk 2042c609719bSwdenk Use this if you have an EEPROM or similar serial access 2043c609719bSwdenk device and a driver for it. 2044c609719bSwdenk 2045c609719bSwdenk - CFG_ENV_OFFSET: 2046c609719bSwdenk - CFG_ENV_SIZE: 2047c609719bSwdenk 2048c609719bSwdenk These two #defines specify the offset and size of the 2049c609719bSwdenk environment area within the total memory of your EEPROM. 2050c609719bSwdenk 2051c609719bSwdenk - CFG_I2C_EEPROM_ADDR: 2052c609719bSwdenk If defined, specified the chip address of the EEPROM device. 2053c609719bSwdenk The default address is zero. 2054c609719bSwdenk 2055c609719bSwdenk - CFG_EEPROM_PAGE_WRITE_BITS: 2056c609719bSwdenk If defined, the number of bits used to address bytes in a 2057c609719bSwdenk single page in the EEPROM device. A 64 byte page, for example 2058c609719bSwdenk would require six bits. 2059c609719bSwdenk 2060c609719bSwdenk - CFG_EEPROM_PAGE_WRITE_DELAY_MS: 2061c609719bSwdenk If defined, the number of milliseconds to delay between 2062c609719bSwdenk page writes. The default is zero milliseconds. 2063c609719bSwdenk 2064c609719bSwdenk - CFG_I2C_EEPROM_ADDR_LEN: 2065c609719bSwdenk The length in bytes of the EEPROM memory array address. Note 2066c609719bSwdenk that this is NOT the chip address length! 2067c609719bSwdenk 20685cf91d6bSwdenk - CFG_I2C_EEPROM_ADDR_OVERFLOW: 20695cf91d6bSwdenk EEPROM chips that implement "address overflow" are ones 20705cf91d6bSwdenk like Catalyst 24WC04/08/16 which has 9/10/11 bits of 20715cf91d6bSwdenk address and the extra bits end up in the "chip address" bit 20725cf91d6bSwdenk slots. This makes a 24WC08 (1Kbyte) chip look like four 256 20735cf91d6bSwdenk byte chips. 20745cf91d6bSwdenk 20755cf91d6bSwdenk Note that we consider the length of the address field to 20765cf91d6bSwdenk still be one byte because the extra address bits are hidden 20775cf91d6bSwdenk in the chip address. 20785cf91d6bSwdenk 2079c609719bSwdenk - CFG_EEPROM_SIZE: 2080c609719bSwdenk The size in bytes of the EEPROM device. 2081c609719bSwdenk 2082c609719bSwdenk 20835779d8d9Swdenk- CFG_ENV_IS_IN_DATAFLASH: 20845779d8d9Swdenk 20855779d8d9Swdenk Define this if you have a DataFlash memory device which you 20865779d8d9Swdenk want to use for the environment. 20875779d8d9Swdenk 20885779d8d9Swdenk - CFG_ENV_OFFSET: 20895779d8d9Swdenk - CFG_ENV_ADDR: 20905779d8d9Swdenk - CFG_ENV_SIZE: 20915779d8d9Swdenk 20925779d8d9Swdenk These three #defines specify the offset and size of the 20935779d8d9Swdenk environment area within the total memory of your DataFlash placed 20945779d8d9Swdenk at the specified address. 20955779d8d9Swdenk 209613a5695bSwdenk- CFG_ENV_IS_IN_NAND: 209713a5695bSwdenk 209813a5695bSwdenk Define this if you have a NAND device which you want to use 209913a5695bSwdenk for the environment. 210013a5695bSwdenk 210113a5695bSwdenk - CFG_ENV_OFFSET: 210213a5695bSwdenk - CFG_ENV_SIZE: 210313a5695bSwdenk 210413a5695bSwdenk These two #defines specify the offset and size of the environment 210513a5695bSwdenk area within the first NAND device. 21065779d8d9Swdenk 2107e443c944SMarkus Klotzbuecher - CFG_ENV_OFFSET_REDUND 2108e443c944SMarkus Klotzbuecher 2109e443c944SMarkus Klotzbuecher This setting describes a second storage area of CFG_ENV_SIZE 2110e443c944SMarkus Klotzbuecher size used to hold a redundant copy of the environment data, 2111e443c944SMarkus Klotzbuecher so that there is a valid backup copy in case there is a 2112e443c944SMarkus Klotzbuecher power failure during a "saveenv" operation. 2113e443c944SMarkus Klotzbuecher 2114e443c944SMarkus Klotzbuecher Note: CFG_ENV_OFFSET and CFG_ENV_OFFSET_REDUND must be aligned 2115e443c944SMarkus Klotzbuecher to a block boundary, and CFG_ENV_SIZE must be a multiple of 2116e443c944SMarkus Klotzbuecher the NAND devices block size. 2117e443c944SMarkus Klotzbuecher 2118c609719bSwdenk- CFG_SPI_INIT_OFFSET 2119c609719bSwdenk 2120c609719bSwdenk Defines offset to the initial SPI buffer area in DPRAM. The 2121c609719bSwdenk area is used at an early stage (ROM part) if the environment 2122c609719bSwdenk is configured to reside in the SPI EEPROM: We need a 520 byte 2123c609719bSwdenk scratch DPRAM area. It is used between the two initialization 2124c609719bSwdenk calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems 2125c609719bSwdenk to be a good choice since it makes it far enough from the 2126c609719bSwdenk start of the data area as well as from the stack pointer. 2127c609719bSwdenk 2128c609719bSwdenkPlease note that the environment is read-only as long as the monitor 2129c609719bSwdenkhas been relocated to RAM and a RAM copy of the environment has been 2130c609719bSwdenkcreated; also, when using EEPROM you will have to use getenv_r() 2131c609719bSwdenkuntil then to read environment variables. 2132c609719bSwdenk 213385ec0bccSwdenkThe environment is protected by a CRC32 checksum. Before the monitor 213485ec0bccSwdenkis relocated into RAM, as a result of a bad CRC you will be working 213585ec0bccSwdenkwith the compiled-in default environment - *silently*!!! [This is 213685ec0bccSwdenknecessary, because the first environment variable we need is the 213785ec0bccSwdenk"baudrate" setting for the console - if we have a bad CRC, we don't 213885ec0bccSwdenkhave any device yet where we could complain.] 2139c609719bSwdenk 2140c609719bSwdenkNote: once the monitor has been relocated, then it will complain if 2141c609719bSwdenkthe default environment is used; a new CRC is computed as soon as you 214285ec0bccSwdenkuse the "saveenv" command to store a valid environment. 2143c609719bSwdenk 2144fc3e2165Swdenk- CFG_FAULT_ECHO_LINK_DOWN: 2145fc3e2165Swdenk Echo the inverted Ethernet link state to the fault LED. 2146fc3e2165Swdenk 2147fc3e2165Swdenk Note: If this option is active, then CFG_FAULT_MII_ADDR 2148fc3e2165Swdenk also needs to be defined. 2149fc3e2165Swdenk 2150fc3e2165Swdenk- CFG_FAULT_MII_ADDR: 2151fc3e2165Swdenk MII address of the PHY to check for the Ethernet link state. 2152c609719bSwdenk 2153c40b2956Swdenk- CFG_64BIT_VSPRINTF: 2154c40b2956Swdenk Makes vsprintf (and all *printf functions) support printing 2155c40b2956Swdenk of 64bit values by using the L quantifier 2156c40b2956Swdenk 2157c40b2956Swdenk- CFG_64BIT_STRTOUL: 2158c40b2956Swdenk Adds simple_strtoull that returns a 64bit value 2159c40b2956Swdenk 2160c609719bSwdenkLow Level (hardware related) configuration options: 2161dc7c9a1aSwdenk--------------------------------------------------- 2162c609719bSwdenk 2163c609719bSwdenk- CFG_CACHELINE_SIZE: 2164c609719bSwdenk Cache Line Size of the CPU. 2165c609719bSwdenk 2166c609719bSwdenk- CFG_DEFAULT_IMMR: 2167c609719bSwdenk Default address of the IMMR after system reset. 21682535d602Swdenk 21692535d602Swdenk Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, 21702535d602Swdenk and RPXsuper) to be able to adjust the position of 21712535d602Swdenk the IMMR register after a reset. 2172c609719bSwdenk 21737f6c2cbcSwdenk- Floppy Disk Support: 21747f6c2cbcSwdenk CFG_FDC_DRIVE_NUMBER 21757f6c2cbcSwdenk 21767f6c2cbcSwdenk the default drive number (default value 0) 21777f6c2cbcSwdenk 21787f6c2cbcSwdenk CFG_ISA_IO_STRIDE 21797f6c2cbcSwdenk 21807f6c2cbcSwdenk defines the spacing between fdc chipset registers 21817f6c2cbcSwdenk (default value 1) 21827f6c2cbcSwdenk 21837f6c2cbcSwdenk CFG_ISA_IO_OFFSET 21847f6c2cbcSwdenk 21857f6c2cbcSwdenk defines the offset of register from address. It 21867f6c2cbcSwdenk depends on which part of the data bus is connected to 21877f6c2cbcSwdenk the fdc chipset. (default value 0) 21887f6c2cbcSwdenk 21897f6c2cbcSwdenk If CFG_ISA_IO_STRIDE CFG_ISA_IO_OFFSET and 21907f6c2cbcSwdenk CFG_FDC_DRIVE_NUMBER are undefined, they take their 21917f6c2cbcSwdenk default value. 21927f6c2cbcSwdenk 21937f6c2cbcSwdenk if CFG_FDC_HW_INIT is defined, then the function 21947f6c2cbcSwdenk fdc_hw_init() is called at the beginning of the FDC 21957f6c2cbcSwdenk setup. fdc_hw_init() must be provided by the board 21967f6c2cbcSwdenk source code. It is used to make hardware dependant 21977f6c2cbcSwdenk initializations. 21987f6c2cbcSwdenk 219925d6712aSwdenk- CFG_IMMR: Physical address of the Internal Memory. 220025d6712aSwdenk DO NOT CHANGE unless you know exactly what you're 220125d6712aSwdenk doing! (11-4) [MPC8xx/82xx systems only] 2202c609719bSwdenk 2203c609719bSwdenk- CFG_INIT_RAM_ADDR: 2204c609719bSwdenk 22057152b1d0Swdenk Start address of memory area that can be used for 2206c609719bSwdenk initial data and stack; please note that this must be 2207c609719bSwdenk writable memory that is working WITHOUT special 2208c609719bSwdenk initialization, i. e. you CANNOT use normal RAM which 2209c609719bSwdenk will become available only after programming the 2210c609719bSwdenk memory controller and running certain initialization 2211c609719bSwdenk sequences. 2212c609719bSwdenk 2213c609719bSwdenk U-Boot uses the following memory types: 2214c609719bSwdenk - MPC8xx and MPC8260: IMMR (internal memory of the CPU) 2215c609719bSwdenk - MPC824X: data cache 2216c609719bSwdenk - PPC4xx: data cache 2217c609719bSwdenk 221885ec0bccSwdenk- CFG_GBL_DATA_OFFSET: 2219c609719bSwdenk 2220c609719bSwdenk Offset of the initial data structure in the memory 2221c609719bSwdenk area defined by CFG_INIT_RAM_ADDR. Usually 222285ec0bccSwdenk CFG_GBL_DATA_OFFSET is chosen such that the initial 2223c609719bSwdenk data is located at the end of the available space 2224c609719bSwdenk (sometimes written as (CFG_INIT_RAM_END - 2225c609719bSwdenk CFG_INIT_DATA_SIZE), and the initial stack is just 2226c609719bSwdenk below that area (growing from (CFG_INIT_RAM_ADDR + 222785ec0bccSwdenk CFG_GBL_DATA_OFFSET) downward. 2228c609719bSwdenk 2229c609719bSwdenk Note: 2230c609719bSwdenk On the MPC824X (or other systems that use the data 2231c609719bSwdenk cache for initial memory) the address chosen for 2232c609719bSwdenk CFG_INIT_RAM_ADDR is basically arbitrary - it must 2233c609719bSwdenk point to an otherwise UNUSED address space between 2234c609719bSwdenk the top of RAM and the start of the PCI space. 2235c609719bSwdenk 2236c609719bSwdenk- CFG_SIUMCR: SIU Module Configuration (11-6) 2237c609719bSwdenk 2238c609719bSwdenk- CFG_SYPCR: System Protection Control (11-9) 2239c609719bSwdenk 2240c609719bSwdenk- CFG_TBSCR: Time Base Status and Control (11-26) 2241c609719bSwdenk 2242c609719bSwdenk- CFG_PISCR: Periodic Interrupt Status and Control (11-31) 2243c609719bSwdenk 2244c609719bSwdenk- CFG_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) 2245c609719bSwdenk 2246c609719bSwdenk- CFG_SCCR: System Clock and reset Control Register (15-27) 2247c609719bSwdenk 2248c609719bSwdenk- CFG_OR_TIMING_SDRAM: 2249c609719bSwdenk SDRAM timing 2250c609719bSwdenk 2251c609719bSwdenk- CFG_MAMR_PTA: 2252c609719bSwdenk periodic timer for refresh 2253c609719bSwdenk 2254c609719bSwdenk- CFG_DER: Debug Event Register (37-47) 2255c609719bSwdenk 2256c609719bSwdenk- FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CFG_REMAP_OR_AM, 2257c609719bSwdenk CFG_PRELIM_OR_AM, CFG_OR_TIMING_FLASH, CFG_OR0_REMAP, 2258c609719bSwdenk CFG_OR0_PRELIM, CFG_BR0_PRELIM, CFG_OR1_REMAP, CFG_OR1_PRELIM, 2259c609719bSwdenk CFG_BR1_PRELIM: 2260c609719bSwdenk Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) 2261c609719bSwdenk 2262c609719bSwdenk- SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, 2263c609719bSwdenk CFG_OR_TIMING_SDRAM, CFG_OR2_PRELIM, CFG_BR2_PRELIM, 2264c609719bSwdenk CFG_OR3_PRELIM, CFG_BR3_PRELIM: 2265c609719bSwdenk Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) 2266c609719bSwdenk 2267c609719bSwdenk- CFG_MAMR_PTA, CFG_MPTPR_2BK_4K, CFG_MPTPR_1BK_4K, CFG_MPTPR_2BK_8K, 2268c609719bSwdenk CFG_MPTPR_1BK_8K, CFG_MAMR_8COL, CFG_MAMR_9COL: 2269c609719bSwdenk Machine Mode Register and Memory Periodic Timer 2270c609719bSwdenk Prescaler definitions (SDRAM timing) 2271c609719bSwdenk 2272c609719bSwdenk- CFG_I2C_UCODE_PATCH, CFG_I2C_DPMEM_OFFSET [0x1FC0]: 2273c609719bSwdenk enable I2C microcode relocation patch (MPC8xx); 2274c609719bSwdenk define relocation offset in DPRAM [DSP2] 2275c609719bSwdenk 2276c609719bSwdenk- CFG_SPI_UCODE_PATCH, CFG_SPI_DPMEM_OFFSET [0x1FC0]: 2277c609719bSwdenk enable SPI microcode relocation patch (MPC8xx); 2278c609719bSwdenk define relocation offset in DPRAM [SCC4] 2279c609719bSwdenk 2280c609719bSwdenk- CFG_USE_OSCCLK: 2281c609719bSwdenk Use OSCM clock mode on MBX8xx board. Be careful, 2282c609719bSwdenk wrong setting might damage your board. Read 2283c609719bSwdenk doc/README.MBX before setting this variable! 2284c609719bSwdenk 2285ea909b76Swdenk- CFG_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) 2286ea909b76Swdenk Offset of the bootmode word in DPRAM used by post 2287ea909b76Swdenk (Power On Self Tests). This definition overrides 2288ea909b76Swdenk #define'd default value in commproc.h resp. 2289ea909b76Swdenk cpm_8260.h. 2290ea909b76Swdenk 22915d232d0eSwdenk- CFG_PCI_SLV_MEM_LOCAL, CFG_PCI_SLV_MEM_BUS, CFG_PICMR0_MASK_ATTRIB, 22925d232d0eSwdenk CFG_PCI_MSTR0_LOCAL, CFG_PCIMSK0_MASK, CFG_PCI_MSTR1_LOCAL, 22935d232d0eSwdenk CFG_PCIMSK1_MASK, CFG_PCI_MSTR_MEM_LOCAL, CFG_PCI_MSTR_MEM_BUS, 22945d232d0eSwdenk CFG_CPU_PCI_MEM_START, CFG_PCI_MSTR_MEM_SIZE, CFG_POCMR0_MASK_ATTRIB, 22955d232d0eSwdenk CFG_PCI_MSTR_MEMIO_LOCAL, CFG_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, 22965d232d0eSwdenk CFG_PCI_MSTR_MEMIO_SIZE, CFG_POCMR1_MASK_ATTRIB, CFG_PCI_MSTR_IO_LOCAL, 22975d232d0eSwdenk CFG_PCI_MSTR_IO_BUS, CFG_CPU_PCI_IO_START, CFG_PCI_MSTR_IO_SIZE, 22985d232d0eSwdenk CFG_POCMR2_MASK_ATTRIB: (MPC826x only) 22995d232d0eSwdenk Overrides the default PCI memory map in cpu/mpc8260/pci.c if set. 23005d232d0eSwdenk 2301bb99ad6dSBen Warren- CONFIG_SPD_EEPROM 2302bb99ad6dSBen Warren Get DDR timing information from an I2C EEPROM. Common with pluggable 2303bb99ad6dSBen Warren memory modules such as SODIMMs 2304bb99ad6dSBen Warren SPD_EEPROM_ADDRESS 2305bb99ad6dSBen Warren I2C address of the SPD EEPROM 2306bb99ad6dSBen Warren 2307bb99ad6dSBen Warren- CFG_SPD_BUS_NUM 2308bb99ad6dSBen Warren If SPD EEPROM is on an I2C bus other than the first one, specify here. 2309bb99ad6dSBen Warren Note that the value must resolve to something your driver can deal with. 2310bb99ad6dSBen Warren 23112ad6b513STimur Tabi- CFG_83XX_DDR_USES_CS0 23122ad6b513STimur Tabi Only for 83xx systems. If specified, then DDR should be configured 23132ad6b513STimur Tabi using CS0 and CS1 instead of CS2 and CS3. 23142ad6b513STimur Tabi 23152ad6b513STimur Tabi- CFG_83XX_DDR_USES_CS0 23162ad6b513STimur Tabi Only for 83xx systems. If specified, then DDR should be configured 23172ad6b513STimur Tabi using CS0 and CS1 instead of CS2 and CS3. 23182ad6b513STimur Tabi 2319c26e454dSwdenk- CONFIG_ETHER_ON_FEC[12] 2320c26e454dSwdenk Define to enable FEC[12] on a 8xx series processor. 2321c26e454dSwdenk 2322c26e454dSwdenk- CONFIG_FEC[12]_PHY 2323c26e454dSwdenk Define to the hardcoded PHY address which corresponds 23246e592385Swdenk to the given FEC; i. e. 2325c26e454dSwdenk #define CONFIG_FEC1_PHY 4 2326c26e454dSwdenk means that the PHY with address 4 is connected to FEC1 2327c26e454dSwdenk 2328c26e454dSwdenk When set to -1, means to probe for first available. 2329c26e454dSwdenk 2330c26e454dSwdenk- CONFIG_FEC[12]_PHY_NORXERR 2331c26e454dSwdenk The PHY does not have a RXERR line (RMII only). 2332c26e454dSwdenk (so program the FEC to ignore it). 2333c26e454dSwdenk 2334c26e454dSwdenk- CONFIG_RMII 2335c26e454dSwdenk Enable RMII mode for all FECs. 2336c26e454dSwdenk Note that this is a global option, we can't 2337c26e454dSwdenk have one FEC in standard MII mode and another in RMII mode. 2338c26e454dSwdenk 23395cf91d6bSwdenk- CONFIG_CRC32_VERIFY 23405cf91d6bSwdenk Add a verify option to the crc32 command. 23415cf91d6bSwdenk The syntax is: 23425cf91d6bSwdenk 23435cf91d6bSwdenk => crc32 -v <address> <count> <crc32> 23445cf91d6bSwdenk 23455cf91d6bSwdenk Where address/count indicate a memory area 23465cf91d6bSwdenk and crc32 is the correct crc32 which the 23475cf91d6bSwdenk area should have. 23485cf91d6bSwdenk 234956523f12Swdenk- CONFIG_LOOPW 235056523f12Swdenk Add the "loopw" memory command. This only takes effect if 2351602ad3b3SJon Loeliger the memory commands are activated globally (CONFIG_CMD_MEM). 235256523f12Swdenk 23537b466641Sstroese- CONFIG_MX_CYCLIC 23547b466641Sstroese Add the "mdc" and "mwc" memory commands. These are cyclic 23557b466641Sstroese "md/mw" commands. 23567b466641Sstroese Examples: 23577b466641Sstroese 23587b466641Sstroese => mdc.b 10 4 500 23597b466641Sstroese This command will print 4 bytes (10,11,12,13) each 500 ms. 23607b466641Sstroese 23617b466641Sstroese => mwc.l 100 12345678 10 23627b466641Sstroese This command will write 12345678 to address 100 all 10 ms. 23637b466641Sstroese 23647b466641Sstroese This only takes effect if the memory commands are activated 2365602ad3b3SJon Loeliger globally (CONFIG_CMD_MEM). 23667b466641Sstroese 23678aa1a2d1Swdenk- CONFIG_SKIP_LOWLEVEL_INIT 23688aa1a2d1Swdenk- CONFIG_SKIP_RELOCATE_UBOOT 23698aa1a2d1Swdenk 23708aa1a2d1Swdenk [ARM only] If these variables are defined, then 23718aa1a2d1Swdenk certain low level initializations (like setting up 23728aa1a2d1Swdenk the memory controller) are omitted and/or U-Boot does 23738aa1a2d1Swdenk not relocate itself into RAM. 23748aa1a2d1Swdenk Normally these variables MUST NOT be defined. The 23758aa1a2d1Swdenk only exception is when U-Boot is loaded (to RAM) by 23768aa1a2d1Swdenk some other boot loader or by a debugger which 23778aa1a2d1Swdenk performs these intializations itself. 23788aa1a2d1Swdenk 2379400558b5Swdenk 2380c609719bSwdenkBuilding the Software: 2381c609719bSwdenk====================== 2382c609719bSwdenk 2383c609719bSwdenkBuilding U-Boot has been tested in native PPC environments (on a 2384c609719bSwdenkPowerBook G3 running LinuxPPC 2000) and in cross environments 2385c609719bSwdenk(running RedHat 6.x and 7.x Linux on x86, Solaris 2.6 on a SPARC, and 2386c609719bSwdenkNetBSD 1.5 on x86). 2387c609719bSwdenk 2388c609719bSwdenkIf you are not using a native PPC environment, it is assumed that you 2389c609719bSwdenkhave the GNU cross compiling tools available in your path and named 2390c609719bSwdenkwith a prefix of "powerpc-linux-". If this is not the case, (e.g. if 2391c609719bSwdenkyou are using Monta Vista's Hard Hat Linux CDK 1.2) you must change 2392c609719bSwdenkthe definition of CROSS_COMPILE in Makefile. For HHL on a 4xx CPU, 2393c609719bSwdenkchange it to: 2394c609719bSwdenk 2395c609719bSwdenk CROSS_COMPILE = ppc_4xx- 2396c609719bSwdenk 2397c609719bSwdenk 2398c609719bSwdenkU-Boot is intended to be simple to build. After installing the 2399c609719bSwdenksources you must configure U-Boot for one specific board type. This 2400c609719bSwdenkis done by typing: 2401c609719bSwdenk 2402c609719bSwdenk make NAME_config 2403c609719bSwdenk 2404c609719bSwdenkwhere "NAME_config" is the name of one of the existing 24052628114eSKim Phillipsconfigurations; see the main Makefile for supported names. 240654387ac9Swdenk 2407c609719bSwdenkNote: for some board special configuration names may exist; check if 2408c609719bSwdenk additional information is available from the board vendor; for 24092729af9dSwdenk instance, the TQM823L systems are available without (standard) 24102729af9dSwdenk or with LCD support. You can select such additional "features" 2411c609719bSwdenk when chosing the configuration, i. e. 2412c609719bSwdenk 24132729af9dSwdenk make TQM823L_config 24142729af9dSwdenk - will configure for a plain TQM823L, i. e. no LCD support 2415c609719bSwdenk 2416c609719bSwdenk make TQM823L_LCD_config 2417c609719bSwdenk - will configure for a TQM823L with U-Boot console on LCD 2418c609719bSwdenk 2419c609719bSwdenk etc. 2420c609719bSwdenk 2421c609719bSwdenk 2422c609719bSwdenkFinally, type "make all", and you should get some working U-Boot 24237152b1d0Swdenkimages ready for download to / installation on your system: 2424c609719bSwdenk 2425c609719bSwdenk- "u-boot.bin" is a raw binary image 2426c609719bSwdenk- "u-boot" is an image in ELF binary format 2427c609719bSwdenk- "u-boot.srec" is in Motorola S-Record format 2428c609719bSwdenk 2429baf31249SMarian BalakowiczBy default the build is performed locally and the objects are saved 2430baf31249SMarian Balakowiczin the source directory. One of the two methods can be used to change 2431baf31249SMarian Balakowiczthis behavior and build U-Boot to some external directory: 2432baf31249SMarian Balakowicz 2433baf31249SMarian Balakowicz1. Add O= to the make command line invocations: 2434baf31249SMarian Balakowicz 2435baf31249SMarian Balakowicz make O=/tmp/build distclean 2436baf31249SMarian Balakowicz make O=/tmp/build NAME_config 2437baf31249SMarian Balakowicz make O=/tmp/build all 2438baf31249SMarian Balakowicz 2439baf31249SMarian Balakowicz2. Set environment variable BUILD_DIR to point to the desired location: 2440baf31249SMarian Balakowicz 2441baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2442baf31249SMarian Balakowicz make distclean 2443baf31249SMarian Balakowicz make NAME_config 2444baf31249SMarian Balakowicz make all 2445baf31249SMarian Balakowicz 2446baf31249SMarian BalakowiczNote that the command line "O=" setting overrides the BUILD_DIR environment 2447baf31249SMarian Balakowiczvariable. 2448baf31249SMarian Balakowicz 2449c609719bSwdenk 2450c609719bSwdenkPlease be aware that the Makefiles assume you are using GNU make, so 2451c609719bSwdenkfor instance on NetBSD you might need to use "gmake" instead of 2452c609719bSwdenknative "make". 2453c609719bSwdenk 2454c609719bSwdenk 2455c609719bSwdenkIf the system board that you have is not listed, then you will need 2456c609719bSwdenkto port U-Boot to your hardware platform. To do this, follow these 2457c609719bSwdenksteps: 2458c609719bSwdenk 2459c609719bSwdenk1. Add a new configuration option for your board to the toplevel 246085ec0bccSwdenk "Makefile" and to the "MAKEALL" script, using the existing 246185ec0bccSwdenk entries as examples. Note that here and at many other places 24627152b1d0Swdenk boards and other names are listed in alphabetical sort order. Please 246385ec0bccSwdenk keep this order. 2464c609719bSwdenk2. Create a new directory to hold your board specific code. Add any 246585ec0bccSwdenk files you need. In your board directory, you will need at least 246685ec0bccSwdenk the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds". 246785ec0bccSwdenk3. Create a new configuration file "include/configs/<board>.h" for 246885ec0bccSwdenk your board 2469c609719bSwdenk3. If you're porting U-Boot to a new CPU, then also create a new 2470c609719bSwdenk directory to hold your CPU specific code. Add any files you need. 247185ec0bccSwdenk4. Run "make <board>_config" with your new name. 2472c609719bSwdenk5. Type "make", and you should get a working "u-boot.srec" file 2473c609719bSwdenk to be installed on your target system. 247485ec0bccSwdenk6. Debug and solve any problems that might arise. 2475c609719bSwdenk [Of course, this last step is much harder than it sounds.] 2476c609719bSwdenk 2477c609719bSwdenk 2478c609719bSwdenkTesting of U-Boot Modifications, Ports to New Hardware, etc.: 2479c609719bSwdenk============================================================== 2480c609719bSwdenk 2481c609719bSwdenkIf you have modified U-Boot sources (for instance added a new board 2482c609719bSwdenkor support for new devices, a new CPU, etc.) you are expected to 2483c609719bSwdenkprovide feedback to the other developers. The feedback normally takes 2484c609719bSwdenkthe form of a "patch", i. e. a context diff against a certain (latest 2485c609719bSwdenkofficial or latest in CVS) version of U-Boot sources. 2486c609719bSwdenk 2487c609719bSwdenkBut before you submit such a patch, please verify that your modifi- 2488c609719bSwdenkcation did not break existing code. At least make sure that *ALL* of 2489c609719bSwdenkthe supported boards compile WITHOUT ANY compiler warnings. To do so, 2490c609719bSwdenkjust run the "MAKEALL" script, which will configure and build U-Boot 2491c609719bSwdenkfor ALL supported system. Be warned, this will take a while. You can 24927152b1d0Swdenkselect which (cross) compiler to use by passing a `CROSS_COMPILE' 2493c609719bSwdenkenvironment variable to the script, i. e. to use the cross tools from 2494c609719bSwdenkMontaVista's Hard Hat Linux you can type 2495c609719bSwdenk 2496c609719bSwdenk CROSS_COMPILE=ppc_8xx- MAKEALL 2497c609719bSwdenk 2498c609719bSwdenkor to build on a native PowerPC system you can type 2499c609719bSwdenk 2500c609719bSwdenk CROSS_COMPILE=' ' MAKEALL 2501c609719bSwdenk 2502baf31249SMarian BalakowiczWhen using the MAKEALL script, the default behaviour is to build U-Boot 2503baf31249SMarian Balakowiczin the source directory. This location can be changed by setting the 2504baf31249SMarian BalakowiczBUILD_DIR environment variable. Also, for each target built, the MAKEALL 2505baf31249SMarian Balakowiczscript saves two log files (<target>.ERR and <target>.MAKEALL) in the 2506baf31249SMarian Balakowicz<source dir>/LOG directory. This default location can be changed by 2507baf31249SMarian Balakowiczsetting the MAKEALL_LOGDIR environment variable. For example: 2508baf31249SMarian Balakowicz 2509baf31249SMarian Balakowicz export BUILD_DIR=/tmp/build 2510baf31249SMarian Balakowicz export MAKEALL_LOGDIR=/tmp/log 2511baf31249SMarian Balakowicz CROSS_COMPILE=ppc_8xx- MAKEALL 2512baf31249SMarian Balakowicz 2513baf31249SMarian BalakowiczWith the above settings build objects are saved in the /tmp/build, log 2514baf31249SMarian Balakowiczfiles are saved in the /tmp/log and the source tree remains clean during 2515baf31249SMarian Balakowiczthe whole build process. 2516baf31249SMarian Balakowicz 2517baf31249SMarian Balakowicz 2518c609719bSwdenkSee also "U-Boot Porting Guide" below. 2519c609719bSwdenk 2520c609719bSwdenk 2521c609719bSwdenkMonitor Commands - Overview: 2522c609719bSwdenk============================ 2523c609719bSwdenk 2524c609719bSwdenkgo - start application at address 'addr' 2525c609719bSwdenkrun - run commands in an environment variable 2526c609719bSwdenkbootm - boot application image from memory 2527c609719bSwdenkbootp - boot image via network using BootP/TFTP protocol 2528c609719bSwdenktftpboot- boot image via network using TFTP protocol 2529c609719bSwdenk and env variables "ipaddr" and "serverip" 2530c609719bSwdenk (and eventually "gatewayip") 2531c609719bSwdenkrarpboot- boot image via network using RARP/TFTP protocol 2532c609719bSwdenkdiskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' 2533c609719bSwdenkloads - load S-Record file over serial line 2534c609719bSwdenkloadb - load binary file over serial line (kermit mode) 2535c609719bSwdenkmd - memory display 2536c609719bSwdenkmm - memory modify (auto-incrementing) 2537c609719bSwdenknm - memory modify (constant address) 2538c609719bSwdenkmw - memory write (fill) 2539c609719bSwdenkcp - memory copy 2540c609719bSwdenkcmp - memory compare 2541c609719bSwdenkcrc32 - checksum calculation 2542c609719bSwdenkimd - i2c memory display 2543c609719bSwdenkimm - i2c memory modify (auto-incrementing) 2544c609719bSwdenkinm - i2c memory modify (constant address) 2545c609719bSwdenkimw - i2c memory write (fill) 2546c609719bSwdenkicrc32 - i2c checksum calculation 2547c609719bSwdenkiprobe - probe to discover valid I2C chip addresses 2548c609719bSwdenkiloop - infinite loop on address range 2549c609719bSwdenkisdram - print SDRAM configuration information 2550c609719bSwdenksspi - SPI utility commands 2551c609719bSwdenkbase - print or set address offset 2552c609719bSwdenkprintenv- print environment variables 2553c609719bSwdenksetenv - set environment variables 2554c609719bSwdenksaveenv - save environment variables to persistent storage 2555c609719bSwdenkprotect - enable or disable FLASH write protection 2556c609719bSwdenkerase - erase FLASH memory 2557c609719bSwdenkflinfo - print FLASH memory information 2558c609719bSwdenkbdinfo - print Board Info structure 2559c609719bSwdenkiminfo - print header information for application image 2560c609719bSwdenkconinfo - print console devices and informations 2561c609719bSwdenkide - IDE sub-system 2562c609719bSwdenkloop - infinite loop on address range 256356523f12Swdenkloopw - infinite write loop on address range 2564c609719bSwdenkmtest - simple RAM test 2565c609719bSwdenkicache - enable or disable instruction cache 2566c609719bSwdenkdcache - enable or disable data cache 2567c609719bSwdenkreset - Perform RESET of the CPU 2568c609719bSwdenkecho - echo args to console 2569c609719bSwdenkversion - print monitor version 2570c609719bSwdenkhelp - print online help 2571c609719bSwdenk? - alias for 'help' 2572c609719bSwdenk 2573c609719bSwdenk 2574c609719bSwdenkMonitor Commands - Detailed Description: 2575c609719bSwdenk======================================== 2576c609719bSwdenk 2577c609719bSwdenkTODO. 2578c609719bSwdenk 2579c609719bSwdenkFor now: just type "help <command>". 2580c609719bSwdenk 2581c609719bSwdenk 2582c609719bSwdenkEnvironment Variables: 2583c609719bSwdenk====================== 2584c609719bSwdenk 2585c609719bSwdenkU-Boot supports user configuration using Environment Variables which 2586c609719bSwdenkcan be made persistent by saving to Flash memory. 2587c609719bSwdenk 2588c609719bSwdenkEnvironment Variables are set using "setenv", printed using 2589c609719bSwdenk"printenv", and saved to Flash using "saveenv". Using "setenv" 2590c609719bSwdenkwithout a value can be used to delete a variable from the 2591c609719bSwdenkenvironment. As long as you don't save the environment you are 2592c609719bSwdenkworking with an in-memory copy. In case the Flash area containing the 2593c609719bSwdenkenvironment is erased by accident, a default environment is provided. 2594c609719bSwdenk 2595c609719bSwdenkSome configuration options can be set using Environment Variables: 2596c609719bSwdenk 2597c609719bSwdenk baudrate - see CONFIG_BAUDRATE 2598c609719bSwdenk 2599c609719bSwdenk bootdelay - see CONFIG_BOOTDELAY 2600c609719bSwdenk 2601c609719bSwdenk bootcmd - see CONFIG_BOOTCOMMAND 2602c609719bSwdenk 2603c609719bSwdenk bootargs - Boot arguments when booting an RTOS image 2604c609719bSwdenk 2605c609719bSwdenk bootfile - Name of the image to load with TFTP 2606c609719bSwdenk 2607c609719bSwdenk autoload - if set to "no" (any string beginning with 'n'), 2608c609719bSwdenk "bootp" will just load perform a lookup of the 2609c609719bSwdenk configuration from the BOOTP server, but not try to 2610c609719bSwdenk load any image using TFTP 2611c609719bSwdenk 2612c609719bSwdenk autostart - if set to "yes", an image loaded using the "bootp", 2613c609719bSwdenk "rarpboot", "tftpboot" or "diskboot" commands will 2614c609719bSwdenk be automatically started (by internally calling 2615c609719bSwdenk "bootm") 2616c609719bSwdenk 26174a6fd34bSwdenk If set to "no", a standalone image passed to the 26184a6fd34bSwdenk "bootm" command will be copied to the load address 26194a6fd34bSwdenk (and eventually uncompressed), but NOT be started. 26204a6fd34bSwdenk This can be used to load and uncompress arbitrary 26214a6fd34bSwdenk data. 26224a6fd34bSwdenk 262317ea1177Swdenk i2cfast - (PPC405GP|PPC405EP only) 262417ea1177Swdenk if set to 'y' configures Linux I2C driver for fast 262517ea1177Swdenk mode (400kHZ). This environment variable is used in 262617ea1177Swdenk initialization code. So, for changes to be effective 262717ea1177Swdenk it must be saved and board must be reset. 262817ea1177Swdenk 2629c609719bSwdenk initrd_high - restrict positioning of initrd images: 2630c609719bSwdenk If this variable is not set, initrd images will be 2631c609719bSwdenk copied to the highest possible address in RAM; this 2632c609719bSwdenk is usually what you want since it allows for 2633c609719bSwdenk maximum initrd size. If for some reason you want to 2634c609719bSwdenk make sure that the initrd image is loaded below the 2635c609719bSwdenk CFG_BOOTMAPSZ limit, you can set this environment 2636c609719bSwdenk variable to a value of "no" or "off" or "0". 2637c609719bSwdenk Alternatively, you can set it to a maximum upper 2638c609719bSwdenk address to use (U-Boot will still check that it 2639c609719bSwdenk does not overwrite the U-Boot stack and data). 2640c609719bSwdenk 2641c609719bSwdenk For instance, when you have a system with 16 MB 26427152b1d0Swdenk RAM, and want to reserve 4 MB from use by Linux, 2643c609719bSwdenk you can do this by adding "mem=12M" to the value of 2644c609719bSwdenk the "bootargs" variable. However, now you must make 26457152b1d0Swdenk sure that the initrd image is placed in the first 2646c609719bSwdenk 12 MB as well - this can be done with 2647c609719bSwdenk 2648c609719bSwdenk setenv initrd_high 00c00000 2649c609719bSwdenk 265038b99261Swdenk If you set initrd_high to 0xFFFFFFFF, this is an 265138b99261Swdenk indication to U-Boot that all addresses are legal 265238b99261Swdenk for the Linux kernel, including addresses in flash 265338b99261Swdenk memory. In this case U-Boot will NOT COPY the 265438b99261Swdenk ramdisk at all. This may be useful to reduce the 265538b99261Swdenk boot time on your system, but requires that this 265638b99261Swdenk feature is supported by your Linux kernel. 265738b99261Swdenk 2658c609719bSwdenk ipaddr - IP address; needed for tftpboot command 2659c609719bSwdenk 2660c609719bSwdenk loadaddr - Default load address for commands like "bootp", 2661dc7c9a1aSwdenk "rarpboot", "tftpboot", "loadb" or "diskboot" 2662c609719bSwdenk 2663c609719bSwdenk loads_echo - see CONFIG_LOADS_ECHO 2664c609719bSwdenk 2665c609719bSwdenk serverip - TFTP server IP address; needed for tftpboot command 2666c609719bSwdenk 2667c609719bSwdenk bootretry - see CONFIG_BOOT_RETRY_TIME 2668c609719bSwdenk 2669c609719bSwdenk bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR 2670c609719bSwdenk 2671c609719bSwdenk bootstopkey - see CONFIG_AUTOBOOT_STOP_STR 2672c609719bSwdenk 2673a3d991bdSwdenk ethprime - When CONFIG_NET_MULTI is enabled controls which 2674a3d991bdSwdenk interface is used first. 2675a3d991bdSwdenk 2676a3d991bdSwdenk ethact - When CONFIG_NET_MULTI is enabled controls which 2677a3d991bdSwdenk interface is currently active. For example you 2678a3d991bdSwdenk can do the following 2679a3d991bdSwdenk 2680a3d991bdSwdenk => setenv ethact FEC ETHERNET 2681a3d991bdSwdenk => ping 192.168.0.1 # traffic sent on FEC ETHERNET 2682a3d991bdSwdenk => setenv ethact SCC ETHERNET 2683a3d991bdSwdenk => ping 10.0.0.1 # traffic sent on SCC ETHERNET 2684a3d991bdSwdenk 2685a3d991bdSwdenk netretry - When set to "no" each network operation will 2686a3d991bdSwdenk either succeed or fail without retrying. 26876e592385Swdenk When set to "once" the network operation will 26886e592385Swdenk fail when all the available network interfaces 26896e592385Swdenk are tried once without success. 2690a3d991bdSwdenk Useful on scripts which control the retry operation 2691a3d991bdSwdenk themselves. 2692a3d991bdSwdenk 269328cb9375SWolfgang Denk tftpsrcport - If this is set, the value is used for TFTP's 2694ecb0ccd9SWolfgang Denk UDP source port. 2695ecb0ccd9SWolfgang Denk 269628cb9375SWolfgang Denk tftpdstport - If this is set, the value is used for TFTP's UDP 269728cb9375SWolfgang Denk destination port instead of the Well Know Port 69. 269828cb9375SWolfgang Denk 2699a3d991bdSwdenk vlan - When set to a value < 4095 the traffic over 2700a3d991bdSwdenk ethernet is encapsulated/received over 802.1q 2701a3d991bdSwdenk VLAN tagged frames. 2702c609719bSwdenk 2703c609719bSwdenkThe following environment variables may be used and automatically 2704c609719bSwdenkupdated by the network boot commands ("bootp" and "rarpboot"), 2705c609719bSwdenkdepending the information provided by your boot server: 2706c609719bSwdenk 2707c609719bSwdenk bootfile - see above 2708c609719bSwdenk dnsip - IP address of your Domain Name Server 2709fe389a82Sstroese dnsip2 - IP address of your secondary Domain Name Server 2710c609719bSwdenk gatewayip - IP address of the Gateway (Router) to use 2711c609719bSwdenk hostname - Target hostname 2712c609719bSwdenk ipaddr - see above 2713c609719bSwdenk netmask - Subnet Mask 2714c609719bSwdenk rootpath - Pathname of the root filesystem on the NFS server 2715c609719bSwdenk serverip - see above 2716c609719bSwdenk 2717c609719bSwdenk 2718c609719bSwdenkThere are two special Environment Variables: 2719c609719bSwdenk 2720c609719bSwdenk serial# - contains hardware identification information such 2721c609719bSwdenk as type string and/or serial number 2722c609719bSwdenk ethaddr - Ethernet address 2723c609719bSwdenk 2724c609719bSwdenkThese variables can be set only once (usually during manufacturing of 2725c609719bSwdenkthe board). U-Boot refuses to delete or overwrite these variables 2726c609719bSwdenkonce they have been set once. 2727c609719bSwdenk 2728c609719bSwdenk 2729c1551ea8SstroeseFurther special Environment Variables: 2730c1551ea8Sstroese 2731c1551ea8Sstroese ver - Contains the U-Boot version string as printed 2732c1551ea8Sstroese with the "version" command. This variable is 2733c1551ea8Sstroese readonly (see CONFIG_VERSION_VARIABLE). 2734c1551ea8Sstroese 2735c1551ea8Sstroese 2736c609719bSwdenkPlease note that changes to some configuration parameters may take 2737c609719bSwdenkonly effect after the next boot (yes, that's just like Windoze :-). 2738c609719bSwdenk 2739c609719bSwdenk 2740f07771ccSwdenkCommand Line Parsing: 2741f07771ccSwdenk===================== 2742f07771ccSwdenk 2743f07771ccSwdenkThere are two different command line parsers available with U-Boot: 27447152b1d0Swdenkthe old "simple" one, and the much more powerful "hush" shell: 2745f07771ccSwdenk 2746f07771ccSwdenkOld, simple command line parser: 2747f07771ccSwdenk-------------------------------- 2748f07771ccSwdenk 2749f07771ccSwdenk- supports environment variables (through setenv / saveenv commands) 2750f07771ccSwdenk- several commands on one line, separated by ';' 2751fe126d8bSWolfgang Denk- variable substitution using "... ${name} ..." syntax 2752f07771ccSwdenk- special characters ('$', ';') can be escaped by prefixing with '\', 2753f07771ccSwdenk for example: 2754fe126d8bSWolfgang Denk setenv bootcmd bootm \${address} 2755f07771ccSwdenk- You can also escape text by enclosing in single apostrophes, for example: 2756f07771ccSwdenk setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' 2757f07771ccSwdenk 2758f07771ccSwdenkHush shell: 2759f07771ccSwdenk----------- 2760f07771ccSwdenk 2761f07771ccSwdenk- similar to Bourne shell, with control structures like 2762f07771ccSwdenk if...then...else...fi, for...do...done; while...do...done, 2763f07771ccSwdenk until...do...done, ... 2764f07771ccSwdenk- supports environment ("global") variables (through setenv / saveenv 2765f07771ccSwdenk commands) and local shell variables (through standard shell syntax 2766f07771ccSwdenk "name=value"); only environment variables can be used with "run" 2767f07771ccSwdenk command 2768f07771ccSwdenk 2769f07771ccSwdenkGeneral rules: 2770f07771ccSwdenk-------------- 2771f07771ccSwdenk 2772f07771ccSwdenk(1) If a command line (or an environment variable executed by a "run" 2773f07771ccSwdenk command) contains several commands separated by semicolon, and 2774f07771ccSwdenk one of these commands fails, then the remaining commands will be 2775f07771ccSwdenk executed anyway. 2776f07771ccSwdenk 2777f07771ccSwdenk(2) If you execute several variables with one call to run (i. e. 2778f07771ccSwdenk calling run with a list af variables as arguments), any failing 2779f07771ccSwdenk command will cause "run" to terminate, i. e. the remaining 2780f07771ccSwdenk variables are not executed. 2781f07771ccSwdenk 2782c609719bSwdenkNote for Redundant Ethernet Interfaces: 2783c609719bSwdenk======================================= 2784c609719bSwdenk 27857152b1d0SwdenkSome boards come with redundant ethernet interfaces; U-Boot supports 2786c609719bSwdenksuch configurations and is capable of automatic selection of a 27877152b1d0Swdenk"working" interface when needed. MAC assignment works as follows: 2788c609719bSwdenk 2789c609719bSwdenkNetwork interfaces are numbered eth0, eth1, eth2, ... Corresponding 2790c609719bSwdenkMAC addresses can be stored in the environment as "ethaddr" (=>eth0), 2791c609719bSwdenk"eth1addr" (=>eth1), "eth2addr", ... 2792c609719bSwdenk 2793c609719bSwdenkIf the network interface stores some valid MAC address (for instance 2794c609719bSwdenkin SROM), this is used as default address if there is NO correspon- 2795c609719bSwdenkding setting in the environment; if the corresponding environment 2796c609719bSwdenkvariable is set, this overrides the settings in the card; that means: 2797c609719bSwdenk 2798c609719bSwdenko If the SROM has a valid MAC address, and there is no address in the 2799c609719bSwdenk environment, the SROM's address is used. 2800c609719bSwdenk 2801c609719bSwdenko If there is no valid address in the SROM, and a definition in the 2802c609719bSwdenk environment exists, then the value from the environment variable is 2803c609719bSwdenk used. 2804c609719bSwdenk 2805c609719bSwdenko If both the SROM and the environment contain a MAC address, and 2806c609719bSwdenk both addresses are the same, this MAC address is used. 2807c609719bSwdenk 2808c609719bSwdenko If both the SROM and the environment contain a MAC address, and the 2809c609719bSwdenk addresses differ, the value from the environment is used and a 2810c609719bSwdenk warning is printed. 2811c609719bSwdenk 2812c609719bSwdenko If neither SROM nor the environment contain a MAC address, an error 2813c609719bSwdenk is raised. 2814c609719bSwdenk 2815c609719bSwdenk 2816c609719bSwdenkImage Formats: 2817c609719bSwdenk============== 2818c609719bSwdenk 2819c609719bSwdenkThe "boot" commands of this monitor operate on "image" files which 2820c609719bSwdenkcan be basicly anything, preceeded by a special header; see the 2821c609719bSwdenkdefinitions in include/image.h for details; basicly, the header 2822c609719bSwdenkdefines the following image properties: 2823c609719bSwdenk 2824c609719bSwdenk* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, 2825c609719bSwdenk 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, 28267f70e853Swdenk LynxOS, pSOS, QNX, RTEMS, ARTOS; 28271f4bb37dSwdenk Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, ARTOS, LynxOS). 28287b64fef3SWolfgang Denk* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, 28293d1e8a9dSwdenk IA64, MIPS, NIOS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; 28307b64fef3SWolfgang Denk Currently supported: ARM, AVR32, Intel x86, MIPS, NIOS, PowerPC). 2831c29fdfc1Swdenk* Compression Type (uncompressed, gzip, bzip2) 2832c609719bSwdenk* Load Address 2833c609719bSwdenk* Entry Point 2834c609719bSwdenk* Image Name 2835c609719bSwdenk* Image Timestamp 2836c609719bSwdenk 2837c609719bSwdenkThe header is marked by a special Magic Number, and both the header 2838c609719bSwdenkand the data portions of the image are secured against corruption by 2839c609719bSwdenkCRC32 checksums. 2840c609719bSwdenk 2841c609719bSwdenk 2842c609719bSwdenkLinux Support: 2843c609719bSwdenk============== 2844c609719bSwdenk 2845c609719bSwdenkAlthough U-Boot should support any OS or standalone application 28467152b1d0Swdenkeasily, the main focus has always been on Linux during the design of 2847c609719bSwdenkU-Boot. 2848c609719bSwdenk 2849c609719bSwdenkU-Boot includes many features that so far have been part of some 2850c609719bSwdenkspecial "boot loader" code within the Linux kernel. Also, any 2851c609719bSwdenk"initrd" images to be used are no longer part of one big Linux image; 2852c609719bSwdenkinstead, kernel and "initrd" are separate images. This implementation 28537152b1d0Swdenkserves several purposes: 2854c609719bSwdenk 2855c609719bSwdenk- the same features can be used for other OS or standalone 2856c609719bSwdenk applications (for instance: using compressed images to reduce the 2857c609719bSwdenk Flash memory footprint) 2858c609719bSwdenk 2859c609719bSwdenk- it becomes much easier to port new Linux kernel versions because 28607152b1d0Swdenk lots of low-level, hardware dependent stuff are done by U-Boot 2861c609719bSwdenk 2862c609719bSwdenk- the same Linux kernel image can now be used with different "initrd" 2863c609719bSwdenk images; of course this also means that different kernel images can 2864c609719bSwdenk be run with the same "initrd". This makes testing easier (you don't 2865c609719bSwdenk have to build a new "zImage.initrd" Linux image when you just 2866c609719bSwdenk change a file in your "initrd"). Also, a field-upgrade of the 2867c609719bSwdenk software is easier now. 2868c609719bSwdenk 2869c609719bSwdenk 2870c609719bSwdenkLinux HOWTO: 2871c609719bSwdenk============ 2872c609719bSwdenk 2873c609719bSwdenkPorting Linux to U-Boot based systems: 2874c609719bSwdenk--------------------------------------- 2875c609719bSwdenk 2876c609719bSwdenkU-Boot cannot save you from doing all the necessary modifications to 2877c609719bSwdenkconfigure the Linux device drivers for use with your target hardware 2878c609719bSwdenk(no, we don't intend to provide a full virtual machine interface to 2879c609719bSwdenkLinux :-). 2880c609719bSwdenk 2881c609719bSwdenkBut now you can ignore ALL boot loader code (in arch/ppc/mbxboot). 2882c609719bSwdenk 2883c609719bSwdenkJust make sure your machine specific header file (for instance 2884c609719bSwdenkinclude/asm-ppc/tqm8xx.h) includes the same definition of the Board 2885c609719bSwdenkInformation structure as we define in include/u-boot.h, and make 2886c609719bSwdenksure that your definition of IMAP_ADDR uses the same value as your 2887c609719bSwdenkU-Boot configuration in CFG_IMMR. 2888c609719bSwdenk 2889c609719bSwdenk 2890c609719bSwdenkConfiguring the Linux kernel: 2891c609719bSwdenk----------------------------- 2892c609719bSwdenk 2893c609719bSwdenkNo specific requirements for U-Boot. Make sure you have some root 2894c609719bSwdenkdevice (initial ramdisk, NFS) for your target system. 2895c609719bSwdenk 2896c609719bSwdenk 2897c609719bSwdenkBuilding a Linux Image: 2898c609719bSwdenk----------------------- 2899c609719bSwdenk 290024ee89b9SwdenkWith U-Boot, "normal" build targets like "zImage" or "bzImage" are 290124ee89b9Swdenknot used. If you use recent kernel source, a new build target 290224ee89b9Swdenk"uImage" will exist which automatically builds an image usable by 290324ee89b9SwdenkU-Boot. Most older kernels also have support for a "pImage" target, 290424ee89b9Swdenkwhich was introduced for our predecessor project PPCBoot and uses a 290524ee89b9Swdenk100% compatible format. 2906c609719bSwdenk 2907c609719bSwdenkExample: 2908c609719bSwdenk 2909c609719bSwdenk make TQM850L_config 2910c609719bSwdenk make oldconfig 2911c609719bSwdenk make dep 291224ee89b9Swdenk make uImage 2913c609719bSwdenk 291424ee89b9SwdenkThe "uImage" build target uses a special tool (in 'tools/mkimage') to 291524ee89b9Swdenkencapsulate a compressed Linux kernel image with header information, 291624ee89b9SwdenkCRC32 checksum etc. for use with U-Boot. This is what we are doing: 2917c609719bSwdenk 291824ee89b9Swdenk* build a standard "vmlinux" kernel image (in ELF binary format): 291924ee89b9Swdenk 292024ee89b9Swdenk* convert the kernel into a raw binary image: 292124ee89b9Swdenk 292224ee89b9Swdenk ${CROSS_COMPILE}-objcopy -O binary \ 292324ee89b9Swdenk -R .note -R .comment \ 292424ee89b9Swdenk -S vmlinux linux.bin 292524ee89b9Swdenk 292624ee89b9Swdenk* compress the binary image: 292724ee89b9Swdenk 292824ee89b9Swdenk gzip -9 linux.bin 292924ee89b9Swdenk 293024ee89b9Swdenk* package compressed binary image for U-Boot: 293124ee89b9Swdenk 293224ee89b9Swdenk mkimage -A ppc -O linux -T kernel -C gzip \ 293324ee89b9Swdenk -a 0 -e 0 -n "Linux Kernel Image" \ 293424ee89b9Swdenk -d linux.bin.gz uImage 293524ee89b9Swdenk 293624ee89b9Swdenk 293724ee89b9SwdenkThe "mkimage" tool can also be used to create ramdisk images for use 293824ee89b9Swdenkwith U-Boot, either separated from the Linux kernel image, or 293924ee89b9Swdenkcombined into one file. "mkimage" encapsulates the images with a 64 294024ee89b9Swdenkbyte header containing information about target architecture, 294124ee89b9Swdenkoperating system, image type, compression method, entry points, time 294224ee89b9Swdenkstamp, CRC32 checksums, etc. 294324ee89b9Swdenk 294424ee89b9Swdenk"mkimage" can be called in two ways: to verify existing images and 294524ee89b9Swdenkprint the header information, or to build new images. 2946c609719bSwdenk 2947c609719bSwdenkIn the first form (with "-l" option) mkimage lists the information 2948c609719bSwdenkcontained in the header of an existing U-Boot image; this includes 2949c609719bSwdenkchecksum verification: 2950c609719bSwdenk 2951c609719bSwdenk tools/mkimage -l image 2952c609719bSwdenk -l ==> list image header information 2953c609719bSwdenk 2954c609719bSwdenkThe second form (with "-d" option) is used to build a U-Boot image 2955c609719bSwdenkfrom a "data file" which is used as image payload: 2956c609719bSwdenk 2957c609719bSwdenk tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ 2958c609719bSwdenk -n name -d data_file image 2959c609719bSwdenk -A ==> set architecture to 'arch' 2960c609719bSwdenk -O ==> set operating system to 'os' 2961c609719bSwdenk -T ==> set image type to 'type' 2962c609719bSwdenk -C ==> set compression type 'comp' 2963c609719bSwdenk -a ==> set load address to 'addr' (hex) 2964c609719bSwdenk -e ==> set entry point to 'ep' (hex) 2965c609719bSwdenk -n ==> set image name to 'name' 2966c609719bSwdenk -d ==> use image data from 'datafile' 2967c609719bSwdenk 296869459791SwdenkRight now, all Linux kernels for PowerPC systems use the same load 296969459791Swdenkaddress (0x00000000), but the entry point address depends on the 297069459791Swdenkkernel version: 2971c609719bSwdenk 2972c609719bSwdenk- 2.2.x kernels have the entry point at 0x0000000C, 297324ee89b9Swdenk- 2.3.x and later kernels have the entry point at 0x00000000. 2974c609719bSwdenk 2975c609719bSwdenkSo a typical call to build a U-Boot image would read: 2976c609719bSwdenk 297724ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 297824ee89b9Swdenk > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ 297924ee89b9Swdenk > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux.gz \ 298024ee89b9Swdenk > examples/uImage.TQM850L 298124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 2982c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 2983c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 2984c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 2985c609719bSwdenk Load Address: 0x00000000 298624ee89b9Swdenk Entry Point: 0x00000000 2987c609719bSwdenk 2988c609719bSwdenkTo verify the contents of the image (or check for corruption): 2989c609719bSwdenk 299024ee89b9Swdenk -> tools/mkimage -l examples/uImage.TQM850L 299124ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 2992c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 2993c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 2994c609719bSwdenk Data Size: 335725 Bytes = 327.86 kB = 0.32 MB 2995c609719bSwdenk Load Address: 0x00000000 299624ee89b9Swdenk Entry Point: 0x00000000 2997c609719bSwdenk 2998c609719bSwdenkNOTE: for embedded systems where boot time is critical you can trade 2999c609719bSwdenkspeed for memory and install an UNCOMPRESSED image instead: this 3000c609719bSwdenkneeds more space in Flash, but boots much faster since it does not 3001c609719bSwdenkneed to be uncompressed: 3002c609719bSwdenk 300324ee89b9Swdenk -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux.gz 300424ee89b9Swdenk -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ 300524ee89b9Swdenk > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ 300624ee89b9Swdenk > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/ppc/coffboot/vmlinux \ 300724ee89b9Swdenk > examples/uImage.TQM850L-uncompressed 300824ee89b9Swdenk Image Name: 2.4.4 kernel for TQM850L 3009c609719bSwdenk Created: Wed Jul 19 02:34:59 2000 3010c609719bSwdenk Image Type: PowerPC Linux Kernel Image (uncompressed) 3011c609719bSwdenk Data Size: 792160 Bytes = 773.59 kB = 0.76 MB 3012c609719bSwdenk Load Address: 0x00000000 301324ee89b9Swdenk Entry Point: 0x00000000 3014c609719bSwdenk 3015c609719bSwdenk 3016c609719bSwdenkSimilar you can build U-Boot images from a 'ramdisk.image.gz' file 3017c609719bSwdenkwhen your kernel is intended to use an initial ramdisk: 3018c609719bSwdenk 3019c609719bSwdenk -> tools/mkimage -n 'Simple Ramdisk Image' \ 3020c609719bSwdenk > -A ppc -O linux -T ramdisk -C gzip \ 3021c609719bSwdenk > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd 3022c609719bSwdenk Image Name: Simple Ramdisk Image 3023c609719bSwdenk Created: Wed Jan 12 14:01:50 2000 3024c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3025c609719bSwdenk Data Size: 566530 Bytes = 553.25 kB = 0.54 MB 3026c609719bSwdenk Load Address: 0x00000000 3027c609719bSwdenk Entry Point: 0x00000000 3028c609719bSwdenk 3029c609719bSwdenk 3030c609719bSwdenkInstalling a Linux Image: 3031c609719bSwdenk------------------------- 3032c609719bSwdenk 3033c609719bSwdenkTo downloading a U-Boot image over the serial (console) interface, 3034c609719bSwdenkyou must convert the image to S-Record format: 3035c609719bSwdenk 3036c609719bSwdenk objcopy -I binary -O srec examples/image examples/image.srec 3037c609719bSwdenk 3038c609719bSwdenkThe 'objcopy' does not understand the information in the U-Boot 3039c609719bSwdenkimage header, so the resulting S-Record file will be relative to 3040c609719bSwdenkaddress 0x00000000. To load it to a given address, you need to 3041c609719bSwdenkspecify the target address as 'offset' parameter with the 'loads' 3042c609719bSwdenkcommand. 3043c609719bSwdenk 3044c609719bSwdenkExample: install the image to address 0x40100000 (which on the 3045c609719bSwdenkTQM8xxL is in the first Flash bank): 3046c609719bSwdenk 3047c609719bSwdenk => erase 40100000 401FFFFF 3048c609719bSwdenk 3049c609719bSwdenk .......... done 3050c609719bSwdenk Erased 8 sectors 3051c609719bSwdenk 3052c609719bSwdenk => loads 40100000 3053c609719bSwdenk ## Ready for S-Record download ... 3054c609719bSwdenk ~>examples/image.srec 3055c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 12 13 ... 3056c609719bSwdenk ... 3057c609719bSwdenk 15989 15990 15991 15992 3058c609719bSwdenk [file transfer complete] 3059c609719bSwdenk [connected] 3060c609719bSwdenk ## Start Addr = 0x00000000 3061c609719bSwdenk 3062c609719bSwdenk 3063c609719bSwdenkYou can check the success of the download using the 'iminfo' command; 3064c609719bSwdenkthis includes a checksum verification so you can be sure no data 3065c609719bSwdenkcorruption happened: 3066c609719bSwdenk 3067c609719bSwdenk => imi 40100000 3068c609719bSwdenk 3069c609719bSwdenk ## Checking Image at 40100000 ... 3070c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3071c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3072c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3073c609719bSwdenk Load Address: 00000000 3074c609719bSwdenk Entry Point: 0000000c 3075c609719bSwdenk Verifying Checksum ... OK 3076c609719bSwdenk 3077c609719bSwdenk 3078c609719bSwdenkBoot Linux: 3079c609719bSwdenk----------- 3080c609719bSwdenk 3081c609719bSwdenkThe "bootm" command is used to boot an application that is stored in 3082c609719bSwdenkmemory (RAM or Flash). In case of a Linux kernel image, the contents 3083c609719bSwdenkof the "bootargs" environment variable is passed to the kernel as 3084c609719bSwdenkparameters. You can check and modify this variable using the 3085c609719bSwdenk"printenv" and "setenv" commands: 3086c609719bSwdenk 3087c609719bSwdenk 3088c609719bSwdenk => printenv bootargs 3089c609719bSwdenk bootargs=root=/dev/ram 3090c609719bSwdenk 3091c609719bSwdenk => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3092c609719bSwdenk 3093c609719bSwdenk => printenv bootargs 3094c609719bSwdenk bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3095c609719bSwdenk 3096c609719bSwdenk => bootm 40020000 3097c609719bSwdenk ## Booting Linux kernel at 40020000 ... 3098c609719bSwdenk Image Name: 2.2.13 for NFS on TQM850L 3099c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3100c609719bSwdenk Data Size: 381681 Bytes = 372 kB = 0 MB 3101c609719bSwdenk Load Address: 00000000 3102c609719bSwdenk Entry Point: 0000000c 3103c609719bSwdenk Verifying Checksum ... OK 3104c609719bSwdenk Uncompressing Kernel Image ... OK 3105c609719bSwdenk 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 3106c609719bSwdenk Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 3107c609719bSwdenk time_init: decrementer frequency = 187500000/60 3108c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3109c609719bSwdenk Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] 3110c609719bSwdenk ... 3111c609719bSwdenk 3112c609719bSwdenkIf you want to boot a Linux kernel with initial ram disk, you pass 31137152b1d0Swdenkthe memory addresses of both the kernel and the initrd image (PPBCOOT 3114c609719bSwdenkformat!) to the "bootm" command: 3115c609719bSwdenk 3116c609719bSwdenk => imi 40100000 40200000 3117c609719bSwdenk 3118c609719bSwdenk ## Checking Image at 40100000 ... 3119c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3120c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3121c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3122c609719bSwdenk Load Address: 00000000 3123c609719bSwdenk Entry Point: 0000000c 3124c609719bSwdenk Verifying Checksum ... OK 3125c609719bSwdenk 3126c609719bSwdenk ## Checking Image at 40200000 ... 3127c609719bSwdenk Image Name: Simple Ramdisk Image 3128c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3129c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3130c609719bSwdenk Load Address: 00000000 3131c609719bSwdenk Entry Point: 00000000 3132c609719bSwdenk Verifying Checksum ... OK 3133c609719bSwdenk 3134c609719bSwdenk => bootm 40100000 40200000 3135c609719bSwdenk ## Booting Linux kernel at 40100000 ... 3136c609719bSwdenk Image Name: 2.2.13 for initrd on TQM850L 3137c609719bSwdenk Image Type: PowerPC Linux Kernel Image (gzip compressed) 3138c609719bSwdenk Data Size: 335725 Bytes = 327 kB = 0 MB 3139c609719bSwdenk Load Address: 00000000 3140c609719bSwdenk Entry Point: 0000000c 3141c609719bSwdenk Verifying Checksum ... OK 3142c609719bSwdenk Uncompressing Kernel Image ... OK 3143c609719bSwdenk ## Loading RAMDisk Image at 40200000 ... 3144c609719bSwdenk Image Name: Simple Ramdisk Image 3145c609719bSwdenk Image Type: PowerPC Linux RAMDisk Image (gzip compressed) 3146c609719bSwdenk Data Size: 566530 Bytes = 553 kB = 0 MB 3147c609719bSwdenk Load Address: 00000000 3148c609719bSwdenk Entry Point: 00000000 3149c609719bSwdenk Verifying Checksum ... OK 3150c609719bSwdenk Loading Ramdisk ... OK 3151c609719bSwdenk 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 3152c609719bSwdenk Boot arguments: root=/dev/ram 3153c609719bSwdenk time_init: decrementer frequency = 187500000/60 3154c609719bSwdenk Calibrating delay loop... 49.77 BogoMIPS 3155c609719bSwdenk ... 3156c609719bSwdenk RAMDISK: Compressed image found at block 0 3157c609719bSwdenk VFS: Mounted root (ext2 filesystem). 3158c609719bSwdenk 3159c609719bSwdenk bash# 3160c609719bSwdenk 31610267768eSMatthew McClintockBoot Linux and pass a flat device tree: 31620267768eSMatthew McClintock----------- 31630267768eSMatthew McClintock 31640267768eSMatthew McClintockFirst, U-Boot must be compiled with the appropriate defines. See the section 31650267768eSMatthew McClintocktitled "Linux Kernel Interface" above for a more in depth explanation. The 31660267768eSMatthew McClintockfollowing is an example of how to start a kernel and pass an updated 31670267768eSMatthew McClintockflat device tree: 31680267768eSMatthew McClintock 31690267768eSMatthew McClintock=> print oftaddr 31700267768eSMatthew McClintockoftaddr=0x300000 31710267768eSMatthew McClintock=> print oft 31720267768eSMatthew McClintockoft=oftrees/mpc8540ads.dtb 31730267768eSMatthew McClintock=> tftp $oftaddr $oft 31740267768eSMatthew McClintockSpeed: 1000, full duplex 31750267768eSMatthew McClintockUsing TSEC0 device 31760267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.101 31770267768eSMatthew McClintockFilename 'oftrees/mpc8540ads.dtb'. 31780267768eSMatthew McClintockLoad address: 0x300000 31790267768eSMatthew McClintockLoading: # 31800267768eSMatthew McClintockdone 31810267768eSMatthew McClintockBytes transferred = 4106 (100a hex) 31820267768eSMatthew McClintock=> tftp $loadaddr $bootfile 31830267768eSMatthew McClintockSpeed: 1000, full duplex 31840267768eSMatthew McClintockUsing TSEC0 device 31850267768eSMatthew McClintockTFTP from server 192.168.1.1; our IP address is 192.168.1.2 31860267768eSMatthew McClintockFilename 'uImage'. 31870267768eSMatthew McClintockLoad address: 0x200000 31880267768eSMatthew McClintockLoading:############ 31890267768eSMatthew McClintockdone 31900267768eSMatthew McClintockBytes transferred = 1029407 (fb51f hex) 31910267768eSMatthew McClintock=> print loadaddr 31920267768eSMatthew McClintockloadaddr=200000 31930267768eSMatthew McClintock=> print oftaddr 31940267768eSMatthew McClintockoftaddr=0x300000 31950267768eSMatthew McClintock=> bootm $loadaddr - $oftaddr 31960267768eSMatthew McClintock## Booting image at 00200000 ... 31970267768eSMatthew McClintock Image Name: Linux-2.6.17-dirty 31980267768eSMatthew McClintock Image Type: PowerPC Linux Kernel Image (gzip compressed) 31990267768eSMatthew McClintock Data Size: 1029343 Bytes = 1005.2 kB 32000267768eSMatthew McClintock Load Address: 00000000 32010267768eSMatthew McClintock Entry Point: 00000000 32020267768eSMatthew McClintock Verifying Checksum ... OK 32030267768eSMatthew McClintock Uncompressing Kernel Image ... OK 32040267768eSMatthew McClintockBooting using flat device tree at 0x300000 32050267768eSMatthew McClintockUsing MPC85xx ADS machine description 32060267768eSMatthew McClintockMemory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb 32070267768eSMatthew McClintock[snip] 32080267768eSMatthew McClintock 32090267768eSMatthew McClintock 32106069ff26SwdenkMore About U-Boot Image Types: 32116069ff26Swdenk------------------------------ 32126069ff26Swdenk 32136069ff26SwdenkU-Boot supports the following image types: 32146069ff26Swdenk 32156069ff26Swdenk "Standalone Programs" are directly runnable in the environment 32166069ff26Swdenk provided by U-Boot; it is expected that (if they behave 32176069ff26Swdenk well) you can continue to work in U-Boot after return from 32186069ff26Swdenk the Standalone Program. 32196069ff26Swdenk "OS Kernel Images" are usually images of some Embedded OS which 32206069ff26Swdenk will take over control completely. Usually these programs 32216069ff26Swdenk will install their own set of exception handlers, device 32226069ff26Swdenk drivers, set up the MMU, etc. - this means, that you cannot 32236069ff26Swdenk expect to re-enter U-Boot except by resetting the CPU. 32246069ff26Swdenk "RAMDisk Images" are more or less just data blocks, and their 32256069ff26Swdenk parameters (address, size) are passed to an OS kernel that is 32266069ff26Swdenk being started. 32276069ff26Swdenk "Multi-File Images" contain several images, typically an OS 32286069ff26Swdenk (Linux) kernel image and one or more data images like 32296069ff26Swdenk RAMDisks. This construct is useful for instance when you want 32306069ff26Swdenk to boot over the network using BOOTP etc., where the boot 32316069ff26Swdenk server provides just a single image file, but you want to get 32326069ff26Swdenk for instance an OS kernel and a RAMDisk image. 32336069ff26Swdenk 32346069ff26Swdenk "Multi-File Images" start with a list of image sizes, each 32356069ff26Swdenk image size (in bytes) specified by an "uint32_t" in network 32366069ff26Swdenk byte order. This list is terminated by an "(uint32_t)0". 32376069ff26Swdenk Immediately after the terminating 0 follow the images, one by 32386069ff26Swdenk one, all aligned on "uint32_t" boundaries (size rounded up to 32396069ff26Swdenk a multiple of 4 bytes). 32406069ff26Swdenk 32416069ff26Swdenk "Firmware Images" are binary images containing firmware (like 32426069ff26Swdenk U-Boot or FPGA images) which usually will be programmed to 32436069ff26Swdenk flash memory. 32446069ff26Swdenk 32456069ff26Swdenk "Script files" are command sequences that will be executed by 32466069ff26Swdenk U-Boot's command interpreter; this feature is especially 32476069ff26Swdenk useful when you configure U-Boot to use a real shell (hush) 32486069ff26Swdenk as command interpreter. 32496069ff26Swdenk 3250c609719bSwdenk 3251c609719bSwdenkStandalone HOWTO: 3252c609719bSwdenk================= 3253c609719bSwdenk 3254c609719bSwdenkOne of the features of U-Boot is that you can dynamically load and 3255c609719bSwdenkrun "standalone" applications, which can use some resources of 3256c609719bSwdenkU-Boot like console I/O functions or interrupt services. 3257c609719bSwdenk 3258c609719bSwdenkTwo simple examples are included with the sources: 3259c609719bSwdenk 3260c609719bSwdenk"Hello World" Demo: 3261c609719bSwdenk------------------- 3262c609719bSwdenk 3263c609719bSwdenk'examples/hello_world.c' contains a small "Hello World" Demo 3264c609719bSwdenkapplication; it is automatically compiled when you build U-Boot. 3265c609719bSwdenkIt's configured to run at address 0x00040004, so you can play with it 3266c609719bSwdenklike that: 3267c609719bSwdenk 3268c609719bSwdenk => loads 3269c609719bSwdenk ## Ready for S-Record download ... 3270c609719bSwdenk ~>examples/hello_world.srec 3271c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3272c609719bSwdenk [file transfer complete] 3273c609719bSwdenk [connected] 3274c609719bSwdenk ## Start Addr = 0x00040004 3275c609719bSwdenk 3276c609719bSwdenk => go 40004 Hello World! This is a test. 3277c609719bSwdenk ## Starting application at 0x00040004 ... 3278c609719bSwdenk Hello World 3279c609719bSwdenk argc = 7 3280c609719bSwdenk argv[0] = "40004" 3281c609719bSwdenk argv[1] = "Hello" 3282c609719bSwdenk argv[2] = "World!" 3283c609719bSwdenk argv[3] = "This" 3284c609719bSwdenk argv[4] = "is" 3285c609719bSwdenk argv[5] = "a" 3286c609719bSwdenk argv[6] = "test." 3287c609719bSwdenk argv[7] = "<NULL>" 3288c609719bSwdenk Hit any key to exit ... 3289c609719bSwdenk 3290c609719bSwdenk ## Application terminated, rc = 0x0 3291c609719bSwdenk 3292c609719bSwdenkAnother example, which demonstrates how to register a CPM interrupt 3293c609719bSwdenkhandler with the U-Boot code, can be found in 'examples/timer.c'. 3294c609719bSwdenkHere, a CPM timer is set up to generate an interrupt every second. 3295c609719bSwdenkThe interrupt service routine is trivial, just printing a '.' 3296c609719bSwdenkcharacter, but this is just a demo program. The application can be 3297c609719bSwdenkcontrolled by the following keys: 3298c609719bSwdenk 3299c609719bSwdenk ? - print current values og the CPM Timer registers 3300c609719bSwdenk b - enable interrupts and start timer 3301c609719bSwdenk e - stop timer and disable interrupts 3302c609719bSwdenk q - quit application 3303c609719bSwdenk 3304c609719bSwdenk => loads 3305c609719bSwdenk ## Ready for S-Record download ... 3306c609719bSwdenk ~>examples/timer.srec 3307c609719bSwdenk 1 2 3 4 5 6 7 8 9 10 11 ... 3308c609719bSwdenk [file transfer complete] 3309c609719bSwdenk [connected] 3310c609719bSwdenk ## Start Addr = 0x00040004 3311c609719bSwdenk 3312c609719bSwdenk => go 40004 3313c609719bSwdenk ## Starting application at 0x00040004 ... 3314c609719bSwdenk TIMERS=0xfff00980 3315c609719bSwdenk Using timer 1 3316c609719bSwdenk tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 3317c609719bSwdenk 3318c609719bSwdenkHit 'b': 3319c609719bSwdenk [q, b, e, ?] Set interval 1000000 us 3320c609719bSwdenk Enabling timer 3321c609719bSwdenkHit '?': 3322c609719bSwdenk [q, b, e, ?] ........ 3323c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 3324c609719bSwdenkHit '?': 3325c609719bSwdenk [q, b, e, ?] . 3326c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 3327c609719bSwdenkHit '?': 3328c609719bSwdenk [q, b, e, ?] . 3329c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 3330c609719bSwdenkHit '?': 3331c609719bSwdenk [q, b, e, ?] . 3332c609719bSwdenk tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 3333c609719bSwdenkHit 'e': 3334c609719bSwdenk [q, b, e, ?] ...Stopping timer 3335c609719bSwdenkHit 'q': 3336c609719bSwdenk [q, b, e, ?] ## Application terminated, rc = 0x0 3337c609719bSwdenk 3338c609719bSwdenk 333985ec0bccSwdenkMinicom warning: 334085ec0bccSwdenk================ 334185ec0bccSwdenk 33427152b1d0SwdenkOver time, many people have reported problems when trying to use the 334385ec0bccSwdenk"minicom" terminal emulation program for serial download. I (wd) 334485ec0bccSwdenkconsider minicom to be broken, and recommend not to use it. Under 3345f07771ccSwdenkUnix, I recommend to use C-Kermit for general purpose use (and 334685ec0bccSwdenkespecially for kermit binary protocol download ("loadb" command), and 334785ec0bccSwdenkuse "cu" for S-Record download ("loads" command). 334885ec0bccSwdenk 334952f52c14SwdenkNevertheless, if you absolutely want to use it try adding this 335052f52c14Swdenkconfiguration to your "File transfer protocols" section: 335152f52c14Swdenk 335252f52c14Swdenk Name Program Name U/D FullScr IO-Red. Multi 335352f52c14Swdenk X kermit /usr/bin/kermit -i -l %l -s Y U Y N N 335452f52c14Swdenk Y kermit /usr/bin/kermit -i -l %l -r N D Y N N 335552f52c14Swdenk 335652f52c14Swdenk 3357c609719bSwdenkNetBSD Notes: 3358c609719bSwdenk============= 3359c609719bSwdenk 3360c609719bSwdenkStarting at version 0.9.2, U-Boot supports NetBSD both as host 3361c609719bSwdenk(build U-Boot) and target system (boots NetBSD/mpc8xx). 3362c609719bSwdenk 3363c609719bSwdenkBuilding requires a cross environment; it is known to work on 3364c609719bSwdenkNetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also 3365c609719bSwdenkneed gmake since the Makefiles are not compatible with BSD make). 3366c609719bSwdenkNote that the cross-powerpc package does not install include files; 3367c609719bSwdenkattempting to build U-Boot will fail because <machine/ansi.h> is 3368c609719bSwdenkmissing. This file has to be installed and patched manually: 3369c609719bSwdenk 3370c609719bSwdenk # cd /usr/pkg/cross/powerpc-netbsd/include 3371c609719bSwdenk # mkdir powerpc 3372c609719bSwdenk # ln -s powerpc machine 3373c609719bSwdenk # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h 3374c609719bSwdenk # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST 3375c609719bSwdenk 3376c609719bSwdenkNative builds *don't* work due to incompatibilities between native 3377c609719bSwdenkand U-Boot include files. 3378c609719bSwdenk 3379c609719bSwdenkBooting assumes that (the first part of) the image booted is a 3380c609719bSwdenkstage-2 loader which in turn loads and then invokes the kernel 3381c609719bSwdenkproper. Loader sources will eventually appear in the NetBSD source 3382c609719bSwdenktree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the 33832a8af187Swdenkmeantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz 3384c609719bSwdenk 3385c609719bSwdenk 3386c609719bSwdenkImplementation Internals: 3387c609719bSwdenk========================= 3388c609719bSwdenk 3389c609719bSwdenkThe following is not intended to be a complete description of every 3390c609719bSwdenkimplementation detail. However, it should help to understand the 3391c609719bSwdenkinner workings of U-Boot and make it easier to port it to custom 3392c609719bSwdenkhardware. 3393c609719bSwdenk 3394c609719bSwdenk 3395c609719bSwdenkInitial Stack, Global Data: 3396c609719bSwdenk--------------------------- 3397c609719bSwdenk 3398c609719bSwdenkThe implementation of U-Boot is complicated by the fact that U-Boot 3399c609719bSwdenkstarts running out of ROM (flash memory), usually without access to 3400c609719bSwdenksystem RAM (because the memory controller is not initialized yet). 3401c609719bSwdenkThis means that we don't have writable Data or BSS segments, and BSS 3402c609719bSwdenkis not initialized as zero. To be able to get a C environment working 3403c609719bSwdenkat all, we have to allocate at least a minimal stack. Implementation 3404c609719bSwdenkoptions for this are defined and restricted by the CPU used: Some CPU 3405c609719bSwdenkmodels provide on-chip memory (like the IMMR area on MPC8xx and 3406c609719bSwdenkMPC826x processors), on others (parts of) the data cache can be 3407c609719bSwdenklocked as (mis-) used as memory, etc. 3408c609719bSwdenk 34097152b1d0Swdenk Chris Hallinan posted a good summary of these issues to the 341043d9616cSwdenk u-boot-users mailing list: 341143d9616cSwdenk 341243d9616cSwdenk Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? 341343d9616cSwdenk From: "Chris Hallinan" <clh@net1plus.com> 341443d9616cSwdenk Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) 341543d9616cSwdenk ... 341643d9616cSwdenk 341743d9616cSwdenk Correct me if I'm wrong, folks, but the way I understand it 341843d9616cSwdenk is this: Using DCACHE as initial RAM for Stack, etc, does not 341943d9616cSwdenk require any physical RAM backing up the cache. The cleverness 342043d9616cSwdenk is that the cache is being used as a temporary supply of 342143d9616cSwdenk necessary storage before the SDRAM controller is setup. It's 342243d9616cSwdenk beyond the scope of this list to expain the details, but you 342343d9616cSwdenk can see how this works by studying the cache architecture and 342443d9616cSwdenk operation in the architecture and processor-specific manuals. 342543d9616cSwdenk 342643d9616cSwdenk OCM is On Chip Memory, which I believe the 405GP has 4K. It 342743d9616cSwdenk is another option for the system designer to use as an 342843d9616cSwdenk initial stack/ram area prior to SDRAM being available. Either 342943d9616cSwdenk option should work for you. Using CS 4 should be fine if your 343043d9616cSwdenk board designers haven't used it for something that would 343143d9616cSwdenk cause you grief during the initial boot! It is frequently not 343243d9616cSwdenk used. 343343d9616cSwdenk 343443d9616cSwdenk CFG_INIT_RAM_ADDR should be somewhere that won't interfere 343543d9616cSwdenk with your processor/board/system design. The default value 343643d9616cSwdenk you will find in any recent u-boot distribution in 34378a316c9bSStefan Roese walnut.h should work for you. I'd set it to a value larger 343843d9616cSwdenk than your SDRAM module. If you have a 64MB SDRAM module, set 343943d9616cSwdenk it above 400_0000. Just make sure your board has no resources 344043d9616cSwdenk that are supposed to respond to that address! That code in 344143d9616cSwdenk start.S has been around a while and should work as is when 344243d9616cSwdenk you get the config right. 344343d9616cSwdenk 344443d9616cSwdenk -Chris Hallinan 344543d9616cSwdenk DS4.COM, Inc. 344643d9616cSwdenk 3447c609719bSwdenkIt is essential to remember this, since it has some impact on the C 3448c609719bSwdenkcode for the initialization procedures: 3449c609719bSwdenk 3450c609719bSwdenk* Initialized global data (data segment) is read-only. Do not attempt 3451c609719bSwdenk to write it. 3452c609719bSwdenk 3453c609719bSwdenk* Do not use any unitialized global data (or implicitely initialized 3454c609719bSwdenk as zero data - BSS segment) at all - this is undefined, initiali- 34557152b1d0Swdenk zation is performed later (when relocating to RAM). 3456c609719bSwdenk 3457c609719bSwdenk* Stack space is very limited. Avoid big data buffers or things like 3458c609719bSwdenk that. 3459c609719bSwdenk 3460c609719bSwdenkHaving only the stack as writable memory limits means we cannot use 3461c609719bSwdenknormal global data to share information beween the code. But it 3462c609719bSwdenkturned out that the implementation of U-Boot can be greatly 3463c609719bSwdenksimplified by making a global data structure (gd_t) available to all 3464c609719bSwdenkfunctions. We could pass a pointer to this data as argument to _all_ 3465c609719bSwdenkfunctions, but this would bloat the code. Instead we use a feature of 3466c609719bSwdenkthe GCC compiler (Global Register Variables) to share the data: we 3467c609719bSwdenkplace a pointer (gd) to the global data into a register which we 3468c609719bSwdenkreserve for this purpose. 3469c609719bSwdenk 34707152b1d0SwdenkWhen choosing a register for such a purpose we are restricted by the 3471c609719bSwdenkrelevant (E)ABI specifications for the current architecture, and by 3472c609719bSwdenkGCC's implementation. 3473c609719bSwdenk 3474c609719bSwdenkFor PowerPC, the following registers have specific use: 3475c609719bSwdenk R1: stack pointer 3476c609719bSwdenk R2: TOC pointer 3477c609719bSwdenk R3-R4: parameter passing and return values 3478c609719bSwdenk R5-R10: parameter passing 3479c609719bSwdenk R13: small data area pointer 3480c609719bSwdenk R30: GOT pointer 3481c609719bSwdenk R31: frame pointer 3482c609719bSwdenk 3483c609719bSwdenk (U-Boot also uses R14 as internal GOT pointer.) 3484c609719bSwdenk 3485c609719bSwdenk ==> U-Boot will use R29 to hold a pointer to the global data 3486c609719bSwdenk 3487c609719bSwdenk Note: on PPC, we could use a static initializer (since the 3488c609719bSwdenk address of the global data structure is known at compile time), 3489c609719bSwdenk but it turned out that reserving a register results in somewhat 3490c609719bSwdenk smaller code - although the code savings are not that big (on 3491c609719bSwdenk average for all boards 752 bytes for the whole U-Boot image, 3492c609719bSwdenk 624 text + 127 data). 3493c609719bSwdenk 3494c609719bSwdenkOn ARM, the following registers are used: 3495c609719bSwdenk 3496c609719bSwdenk R0: function argument word/integer result 3497c609719bSwdenk R1-R3: function argument word 3498c609719bSwdenk R9: GOT pointer 3499c609719bSwdenk R10: stack limit (used only if stack checking if enabled) 3500c609719bSwdenk R11: argument (frame) pointer 3501c609719bSwdenk R12: temporary workspace 3502c609719bSwdenk R13: stack pointer 3503c609719bSwdenk R14: link register 3504c609719bSwdenk R15: program counter 3505c609719bSwdenk 3506c609719bSwdenk ==> U-Boot will use R8 to hold a pointer to the global data 3507c609719bSwdenk 3508d87080b7SWolfgang DenkNOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, 3509d87080b7SWolfgang Denkor current versions of GCC may "optimize" the code too much. 3510c609719bSwdenk 3511c609719bSwdenkMemory Management: 3512c609719bSwdenk------------------ 3513c609719bSwdenk 3514c609719bSwdenkU-Boot runs in system state and uses physical addresses, i.e. the 3515c609719bSwdenkMMU is not used either for address mapping nor for memory protection. 3516c609719bSwdenk 3517c609719bSwdenkThe available memory is mapped to fixed addresses using the memory 3518c609719bSwdenkcontroller. In this process, a contiguous block is formed for each 3519c609719bSwdenkmemory type (Flash, SDRAM, SRAM), even when it consists of several 3520c609719bSwdenkphysical memory banks. 3521c609719bSwdenk 3522c609719bSwdenkU-Boot is installed in the first 128 kB of the first Flash bank (on 3523c609719bSwdenkTQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After 3524c609719bSwdenkbooting and sizing and initializing DRAM, the code relocates itself 3525c609719bSwdenkto the upper end of DRAM. Immediately below the U-Boot code some 3526c609719bSwdenkmemory is reserved for use by malloc() [see CFG_MALLOC_LEN 3527c609719bSwdenkconfiguration setting]. Below that, a structure with global Board 3528c609719bSwdenkInfo data is placed, followed by the stack (growing downward). 3529c609719bSwdenk 3530c609719bSwdenkAdditionally, some exception handler code is copied to the low 8 kB 3531c609719bSwdenkof DRAM (0x00000000 ... 0x00001FFF). 3532c609719bSwdenk 3533c609719bSwdenkSo a typical memory configuration with 16 MB of DRAM could look like 3534c609719bSwdenkthis: 3535c609719bSwdenk 3536c609719bSwdenk 0x0000 0000 Exception Vector code 3537c609719bSwdenk : 3538c609719bSwdenk 0x0000 1FFF 3539c609719bSwdenk 0x0000 2000 Free for Application Use 3540c609719bSwdenk : 3541c609719bSwdenk : 3542c609719bSwdenk 3543c609719bSwdenk : 3544c609719bSwdenk : 3545c609719bSwdenk 0x00FB FF20 Monitor Stack (Growing downward) 3546c609719bSwdenk 0x00FB FFAC Board Info Data and permanent copy of global data 3547c609719bSwdenk 0x00FC 0000 Malloc Arena 3548c609719bSwdenk : 3549c609719bSwdenk 0x00FD FFFF 3550c609719bSwdenk 0x00FE 0000 RAM Copy of Monitor Code 3551c609719bSwdenk ... eventually: LCD or video framebuffer 3552c609719bSwdenk ... eventually: pRAM (Protected RAM - unchanged by reset) 3553c609719bSwdenk 0x00FF FFFF [End of RAM] 3554c609719bSwdenk 3555c609719bSwdenk 3556c609719bSwdenkSystem Initialization: 3557c609719bSwdenk---------------------- 3558c609719bSwdenk 3559c609719bSwdenkIn the reset configuration, U-Boot starts at the reset entry point 3560c609719bSwdenk(on most PowerPC systens at address 0x00000100). Because of the reset 3561c609719bSwdenkconfiguration for CS0# this is a mirror of the onboard Flash memory. 35627152b1d0SwdenkTo be able to re-map memory U-Boot then jumps to its link address. 3563c609719bSwdenkTo be able to implement the initialization code in C, a (small!) 3564c609719bSwdenkinitial stack is set up in the internal Dual Ported RAM (in case CPUs 3565c609719bSwdenkwhich provide such a feature like MPC8xx or MPC8260), or in a locked 3566c609719bSwdenkpart of the data cache. After that, U-Boot initializes the CPU core, 3567c609719bSwdenkthe caches and the SIU. 3568c609719bSwdenk 3569c609719bSwdenkNext, all (potentially) available memory banks are mapped using a 3570c609719bSwdenkpreliminary mapping. For example, we put them on 512 MB boundaries 3571c609719bSwdenk(multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash 3572c609719bSwdenkon 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is 3573c609719bSwdenkprogrammed for SDRAM access. Using the temporary configuration, a 3574c609719bSwdenksimple memory test is run that determines the size of the SDRAM 3575c609719bSwdenkbanks. 3576c609719bSwdenk 3577c609719bSwdenkWhen there is more than one SDRAM bank, and the banks are of 35787152b1d0Swdenkdifferent size, the largest is mapped first. For equal size, the first 3579c609719bSwdenkbank (CS2#) is mapped first. The first mapping is always for address 3580c609719bSwdenk0x00000000, with any additional banks following immediately to create 3581c609719bSwdenkcontiguous memory starting from 0. 3582c609719bSwdenk 3583c609719bSwdenkThen, the monitor installs itself at the upper end of the SDRAM area 3584c609719bSwdenkand allocates memory for use by malloc() and for the global Board 3585c609719bSwdenkInfo data; also, the exception vector code is copied to the low RAM 3586c609719bSwdenkpages, and the final stack is set up. 3587c609719bSwdenk 3588c609719bSwdenkOnly after this relocation will you have a "normal" C environment; 3589c609719bSwdenkuntil that you are restricted in several ways, mostly because you are 3590c609719bSwdenkrunning from ROM, and because the code will have to be relocated to a 3591c609719bSwdenknew address in RAM. 3592c609719bSwdenk 3593c609719bSwdenk 3594c609719bSwdenkU-Boot Porting Guide: 3595c609719bSwdenk---------------------- 3596c609719bSwdenk 3597c609719bSwdenk[Based on messages by Jerry Van Baren in the U-Boot-Users mailing 35986aff3115Swdenklist, October 2002] 3599c609719bSwdenk 3600c609719bSwdenk 3601c609719bSwdenkint main (int argc, char *argv[]) 3602c609719bSwdenk{ 3603c609719bSwdenk sighandler_t no_more_time; 3604c609719bSwdenk 3605c609719bSwdenk signal (SIGALRM, no_more_time); 3606c609719bSwdenk alarm (PROJECT_DEADLINE - toSec (3 * WEEK)); 3607c609719bSwdenk 3608c609719bSwdenk if (available_money > available_manpower) { 3609c609719bSwdenk pay consultant to port U-Boot; 3610c609719bSwdenk return 0; 3611c609719bSwdenk } 3612c609719bSwdenk 3613c609719bSwdenk Download latest U-Boot source; 3614c609719bSwdenk 36156aff3115Swdenk Subscribe to u-boot-users mailing list; 36166aff3115Swdenk 3617c609719bSwdenk if (clueless) { 3618c609719bSwdenk email ("Hi, I am new to U-Boot, how do I get started?"); 3619c609719bSwdenk } 3620c609719bSwdenk 3621c609719bSwdenk while (learning) { 3622c609719bSwdenk Read the README file in the top level directory; 36237cb22f97Swdenk Read http://www.denx.de/twiki/bin/view/DULG/Manual ; 3624c609719bSwdenk Read the source, Luke; 3625c609719bSwdenk } 3626c609719bSwdenk 3627c609719bSwdenk if (available_money > toLocalCurrency ($2500)) { 3628c609719bSwdenk Buy a BDI2000; 3629c609719bSwdenk } else { 3630c609719bSwdenk Add a lot of aggravation and time; 3631c609719bSwdenk } 3632c609719bSwdenk 3633c609719bSwdenk Create your own board support subdirectory; 3634c609719bSwdenk 36356aff3115Swdenk Create your own board config file; 36366aff3115Swdenk 3637c609719bSwdenk while (!running) { 3638c609719bSwdenk do { 3639c609719bSwdenk Add / modify source code; 3640c609719bSwdenk } until (compiles); 3641c609719bSwdenk Debug; 3642c609719bSwdenk if (clueless) 3643c609719bSwdenk email ("Hi, I am having problems..."); 3644c609719bSwdenk } 3645c609719bSwdenk Send patch file to Wolfgang; 3646c609719bSwdenk 3647c609719bSwdenk return 0; 3648c609719bSwdenk} 3649c609719bSwdenk 3650c609719bSwdenkvoid no_more_time (int sig) 3651c609719bSwdenk{ 3652c609719bSwdenk hire_a_guru(); 3653c609719bSwdenk} 3654c609719bSwdenk 3655c609719bSwdenk 3656c609719bSwdenkCoding Standards: 3657c609719bSwdenk----------------- 3658c609719bSwdenk 3659c609719bSwdenkAll contributions to U-Boot should conform to the Linux kernel 36602c051651SDetlev Zundelcoding style; see the file "Documentation/CodingStyle" and the script 36612c051651SDetlev Zundel"scripts/Lindent" in your Linux kernel source directory. In sources 36622c051651SDetlev Zundeloriginating from U-Boot a style corresponding to "Lindent -pcs" (adding 36632c051651SDetlev Zundelspaces before parameters to function calls) is actually used. 3664c609719bSwdenk 36652c051651SDetlev ZundelSource files originating from a different project (for example the 36662c051651SDetlev ZundelMTD subsystem) are generally exempt from these guidelines and are not 36672c051651SDetlev Zundelreformated to ease subsequent migration to newer versions of those 36682c051651SDetlev Zundelsources. 36692c051651SDetlev Zundel 36702c051651SDetlev ZundelPlease note that U-Boot is implemented in C (and to some small parts in 36712c051651SDetlev ZundelAssembler); no C++ is used, so please do not use C++ style comments (//) 36722c051651SDetlev Zundelin your code. 3673c609719bSwdenk 3674c178d3daSwdenkPlease also stick to the following formatting rules: 3675180d3f74Swdenk- remove any trailing white space 3676180d3f74Swdenk- use TAB characters for indentation, not spaces 3677180d3f74Swdenk- make sure NOT to use DOS '\r\n' line feeds 3678180d3f74Swdenk- do not add more than 2 empty lines to source files 3679180d3f74Swdenk- do not add trailing empty lines to source files 3680180d3f74Swdenk 3681c609719bSwdenkSubmissions which do not conform to the standards may be returned 3682c609719bSwdenkwith a request to reformat the changes. 3683c609719bSwdenk 3684c609719bSwdenk 3685c609719bSwdenkSubmitting Patches: 3686c609719bSwdenk------------------- 3687c609719bSwdenk 3688c609719bSwdenkSince the number of patches for U-Boot is growing, we need to 3689c609719bSwdenkestablish some rules. Submissions which do not conform to these rules 3690c609719bSwdenkmay be rejected, even when they contain important and valuable stuff. 3691c609719bSwdenk 369290dc6704SwdenkPatches shall be sent to the u-boot-users mailing list. 3693c609719bSwdenk 3694c609719bSwdenkWhen you send a patch, please include the following information with 3695c609719bSwdenkit: 3696c609719bSwdenk 3697c609719bSwdenk* For bug fixes: a description of the bug and how your patch fixes 3698c609719bSwdenk this bug. Please try to include a way of demonstrating that the 3699c609719bSwdenk patch actually fixes something. 3700c609719bSwdenk 3701c609719bSwdenk* For new features: a description of the feature and your 3702c609719bSwdenk implementation. 3703c609719bSwdenk 3704c609719bSwdenk* A CHANGELOG entry as plaintext (separate from the patch) 3705c609719bSwdenk 3706c609719bSwdenk* For major contributions, your entry to the CREDITS file 3707c609719bSwdenk 3708c609719bSwdenk* When you add support for a new board, don't forget to add this 3709c609719bSwdenk board to the MAKEALL script, too. 3710c609719bSwdenk 3711c609719bSwdenk* If your patch adds new configuration options, don't forget to 3712c609719bSwdenk document these in the README file. 3713c609719bSwdenk 3714c609719bSwdenk* The patch itself. If you are accessing the CVS repository use "cvs 3715c609719bSwdenk update; cvs diff -puRN"; else, use "diff -purN OLD NEW". If your 3716c609719bSwdenk version of diff does not support these options, then get the latest 3717c609719bSwdenk version of GNU diff. 3718c609719bSwdenk 37196dff5529Swdenk The current directory when running this command shall be the top 37206dff5529Swdenk level directory of the U-Boot source tree, or it's parent directory 37216dff5529Swdenk (i. e. please make sure that your patch includes sufficient 37226dff5529Swdenk directory information for the affected files). 37236dff5529Swdenk 3724c609719bSwdenk We accept patches as plain text, MIME attachments or as uuencoded 3725c609719bSwdenk gzipped text. 3726c609719bSwdenk 372752f52c14Swdenk* If one logical set of modifications affects or creates several 372852f52c14Swdenk files, all these changes shall be submitted in a SINGLE patch file. 372952f52c14Swdenk 373052f52c14Swdenk* Changesets that contain different, unrelated modifications shall be 373152f52c14Swdenk submitted as SEPARATE patches, one patch per changeset. 373252f52c14Swdenk 373352f52c14Swdenk 3734c609719bSwdenkNotes: 3735c609719bSwdenk 3736c609719bSwdenk* Before sending the patch, run the MAKEALL script on your patched 3737c609719bSwdenk source tree and make sure that no errors or warnings are reported 3738c609719bSwdenk for any of the boards. 3739c609719bSwdenk 3740c609719bSwdenk* Keep your modifications to the necessary minimum: A patch 3741c609719bSwdenk containing several unrelated changes or arbitrary reformats will be 3742c609719bSwdenk returned with a request to re-formatting / split it. 3743c609719bSwdenk 3744c609719bSwdenk* If you modify existing code, make sure that your new code does not 3745c609719bSwdenk add to the memory footprint of the code ;-) Small is beautiful! 3746c609719bSwdenk When adding new features, these should compile conditionally only 3747c609719bSwdenk (using #ifdef), and the resulting code with the new feature 3748c609719bSwdenk disabled must not need more memory than the old code without your 3749c609719bSwdenk modification. 375090dc6704Swdenk 375190dc6704Swdenk* Remember that there is a size limit of 40 kB per message on the 375290dc6704Swdenk u-boot-users mailing list. Compression may help. 3753