X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=c90f6ee2d9dea89b8ca50b5563d6eaffc701342d;hb=31b9ab33d93d88ff89f3046aa45c68667a378a56;hp=43fb1c0d8959b515c62e612280a0ba538d2921ce;hpb=7511835b29f2074ebfa8ea794f0303ec8e49542b;p=u-boot diff --git a/README b/README index 43fb1c0d89..c90f6ee2d9 100644 --- a/README +++ b/README @@ -318,6 +318,11 @@ The following options need to be configured: that this requires a (stable) reference clock (32 kHz RTC clock or CONFIG_SYS_8XX_XIN) + CONFIG_SYS_DELAYED_ICACHE + + Define this option if you want to enable the + ICache only when Code runs from RAM. + - Intel Monahans options: CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO @@ -588,7 +593,6 @@ The following options need to be configured: except those marked below with a "*". CONFIG_CMD_ASKENV * ask for env variable - CONFIG_CMD_AUTOSCRIPT Autoscript Support CONFIG_CMD_BDI bdinfo CONFIG_CMD_BEDBUG * Include BedBug Debugger CONFIG_CMD_BMP * BMP support @@ -599,7 +603,6 @@ The following options need to be configured: CONFIG_CMD_DATE * support for RTC, date/time... CONFIG_CMD_DHCP * DHCP support CONFIG_CMD_DIAG * Diagnostics - CONFIG_CMD_DOC * Disk-On-Chip Support CONFIG_CMD_DS4510 * ds4510 I2C gpio commands CONFIG_CMD_DS4510_INFO * ds4510 I2C info command CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd @@ -626,11 +629,14 @@ The following options need to be configured: CONFIG_CMD_KGDB * kgdb CONFIG_CMD_LOADB loadb CONFIG_CMD_LOADS loads + CONFIG_CMD_MD5SUM print md5 message digest + (requires CONFIG_CMD_MEMORY and CONFIG_MD5) CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, loop, loopw, mtest CONFIG_CMD_MISC Misc functions like sleep etc CONFIG_CMD_MMC * MMC memory mapped support CONFIG_CMD_MII * MII utility commands + CONFIG_CMD_MTDPARTS * MTD partition support CONFIG_CMD_NAND * NAND support CONFIG_CMD_NET bootp, tftpboot, rarpboot CONFIG_CMD_PCA953X * PCA953x I2C gpio commands @@ -648,6 +654,9 @@ The following options need to be configured: (requires CONFIG_CMD_I2C) CONFIG_CMD_SETGETDCR Support for DCR Register access (4xx only) + CONFIG_CMD_SHA1 print sha1 memory digest + (requires CONFIG_CMD_MEMORY) + CONFIG_CMD_SOURCE "source" command Support CONFIG_CMD_SPI * SPI serial bus support CONFIG_CMD_USB * USB support CONFIG_CMD_VFD * VFD support (TRAB) @@ -849,9 +858,13 @@ The following options need to be configured: MPC5200 USB requires additional defines: CONFIG_USB_CLOCK for 528 MHz Clock: 0x0001bbbb + CONFIG_PSC3_USB + for USB on PSC3 CONFIG_USB_CONFIG for differential drivers: 0x00001000 for single ended drivers: 0x00005000 + for differential drivers on PSC3: 0x00000100 + for single ended drivers on PSC3: 0x00004100 CONFIG_SYS_USB_EVENT_POLL May be defined to allow interrupt polling instead of using asynchronous interrupts @@ -1068,6 +1081,26 @@ The following options need to be configured: allows for a "silent" boot where a splash screen is loaded very quickly after power-on. + CONFIG_SPLASH_SCREEN_ALIGN + + If this option is set the splash image can be freely positioned + on the screen. Environment variable "splashpos" specifies the + position as "x,y". If a positive number is given it is used as + number of pixel from left/top. If a negative number is given it + is used as number of pixel from right/bottom. You can also + specify 'm' for centering the image. + + Example: + setenv splashpos m,m + => image at center of screen + + setenv splashpos 30,20 + => image at x = 30 and y = 20 + + setenv splashpos -10,m + => vertically centered image + at x = dspWidth - bmpWidth - 9 + - Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP If this option is set, additionally to standard BMP @@ -1159,6 +1192,11 @@ The following options need to be configured: Defines a default value for the IP address of a TFTP server to contact when using the "tftboot" command. + CONFIG_KEEP_SERVERADDR + + Keeps the server's MAC address, in the env 'serveraddr' + for passing to bootargs (like Linux's netconsole option) + - Multicast TFTP Mode: CONFIG_MCAST_TFTP @@ -1309,11 +1347,6 @@ The following options need to be configured: clock chips. See common/cmd_i2c.c for a description of the command line interface. - CONFIG_I2C_CMD_TREE is a recommended option that places - all I2C commands under a single 'i2c' root command. The - older 'imm', 'imd', 'iprobe' etc. commands are considered - deprecated and may disappear in the future. - CONFIG_HARD_I2C selects a hardware I2C controller. CONFIG_SOFT_I2C configures u-boot to use a software (aka @@ -1429,9 +1462,9 @@ The following options need to be configured: CONFIG_SYS_I2C_NOPROBES This option specifies a list of I2C devices that will be skipped - when the 'i2c probe' command is issued (or 'iprobe' using the legacy - command). If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device - pairs. Otherwise, specify a 1D array of device addresses + when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS + is set, specify a list of bus-device pairs. Otherwise, specify + a 1D array of device addresses e.g. #undef CONFIG_I2C_MULTI_BUS @@ -1783,7 +1816,7 @@ The following options need to be configured: Note: overly (ab)use of the default environment is discouraged. Make sure to check other ways to preset - the environment like the autoscript function or the + the environment like the "source" command or the boot command first. - DataFlash Support: @@ -1845,6 +1878,17 @@ The following options need to be configured: These options enable and control the auto-update feature; for a more detailed description refer to doc/README.update. +- MTD Support (mtdparts command, UBI support) + CONFIG_MTD_DEVICE + + Adds the MTD device infrastructure from the Linux kernel. + Needed for mtdparts command support. + + CONFIG_MTD_PARTITIONS + + Adds the MTD partitioning infrastructure from the Linux + kernel. Needed for UBI support. + Legacy uImage format: Arg Where When @@ -1942,8 +1986,8 @@ Legacy uImage format: 81 common/cmd_net.c NetLoop() back without error -82 common/cmd_net.c size == 0 (File with size 0 loaded) 82 common/cmd_net.c trying automatic boot - 83 common/cmd_net.c running autoscript - -83 common/cmd_net.c some error in automatic boot or autoscript + 83 common/cmd_net.c running "source" command + -83 common/cmd_net.c some error in automatic boot or "source" command 84 common/cmd_net.c end without errors FIT uImage format: @@ -2416,6 +2460,12 @@ to save the current settings. to a block boundary, and CONFIG_ENV_SIZE must be a multiple of the NAND devices block size. +- CONFIG_NAND_ENV_DST + + Defines address in RAM to which the nand_spl code should copy the + environment. If redundant environment is used, it will be copied to + CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. + - CONFIG_SYS_SPI_INIT_OFFSET Defines offset to the initial SPI buffer area in DPRAM. The @@ -2690,6 +2740,11 @@ Low Level (hardware related) configuration options: some other boot loader or by a debugger which performs these initializations itself. +- CONFIG_PRELOADER + + Modifies the behaviour of start.S when compiling a loader + that is executed before the actual U-Boot. E.g. when + compiling a NAND SPL. Building the Software: ====================== @@ -2710,6 +2765,16 @@ necessary. For example using the ELDK on a 4xx CPU, please enter: $ CROSS_COMPILE=ppc_4xx- $ export CROSS_COMPILE +Note: If you wish to generate Windows versions of the utilities in + the tools directory you can use the MinGW toolchain + (http://www.mingw.org). Set your HOST tools to the MinGW + toolchain and execute 'make tools'. For example: + + $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools + + Binaries such as tools/mkimage.exe will be created which can + be executed on computers running Windows. + U-Boot is intended to be simple to build. After installing the sources you must configure U-Boot for one specific board type. This is done by typing: @@ -2855,14 +2920,7 @@ mw - memory write (fill) cp - memory copy cmp - memory compare crc32 - checksum calculation -imd - i2c memory display -imm - i2c memory modify (auto-incrementing) -inm - i2c memory modify (constant address) -imw - i2c memory write (fill) -icrc32 - i2c checksum calculation -iprobe - probe to discover valid I2C chip addresses -iloop - infinite loop on address range -isdram - print SDRAM configuration information +i2c - I2C sub-system sspi - SPI utility commands base - print or set address offset printenv- print environment variables @@ -2946,7 +3004,7 @@ Some configuration options can be set using Environment Variables: autoscript - if set to "yes" commands like "loadb", "loady", "bootp", "tftpb", "rarpboot" and "nfs" will attempt to automatically run script images (by internally - calling "autoscript"). + calling "source"). autoscript_uname - if script image is in a format (FIT) this variable is used to get script subimage unit name. @@ -3854,10 +3912,10 @@ For PowerPC, the following registers have specific use: average for all boards 752 bytes for the whole U-Boot image, 624 text + 127 data). -On Blackfin, the normal C ABI (except for P5) is followed as documented here: +On Blackfin, the normal C ABI (except for P3) is followed as documented here: http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface - ==> U-Boot will use P5 to hold a pointer to the global data + ==> U-Boot will use P3 to hold a pointer to the global data On ARM, the following registers are used: @@ -3966,15 +4024,15 @@ U-Boot Porting Guide: list, October 2002] -int main (int argc, char *argv[]) +int main(int argc, char *argv[]) { sighandler_t no_more_time; - signal (SIGALRM, no_more_time); - alarm (PROJECT_DEADLINE - toSec (3 * WEEK)); + signal(SIGALRM, no_more_time); + alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); if (available_money > available_manpower) { - pay consultant to port U-Boot; + Pay consultant to port U-Boot; return 0; } @@ -3982,35 +4040,47 @@ int main (int argc, char *argv[]) Subscribe to u-boot mailing list; - if (clueless) { - email ("Hi, I am new to U-Boot, how do I get started?"); - } + if (clueless) + email("Hi, I am new to U-Boot, how do I get started?"); while (learning) { Read the README file in the top level directory; - Read http://www.denx.de/twiki/bin/view/DULG/Manual ; + Read http://www.denx.de/twiki/bin/view/DULG/Manual; + Read applicable doc/*.README; Read the source, Luke; + /* find . -name "*.[chS]" | xargs grep -i */ } - if (available_money > toLocalCurrency ($2500)) { - Buy a BDI2000; - } else { + if (available_money > toLocalCurrency ($2500)) + Buy a BDI3000; + else Add a lot of aggravation and time; - } - - Create your own board support subdirectory; - Create your own board config file; - - while (!running) { - do { - Add / modify source code; - } until (compiles); - Debug; - if (clueless) - email ("Hi, I am having problems..."); + if (a similar board exists) { /* hopefully... */ + cp -a board/ board/ + cp include/configs/.h include/configs/.h + } else { + Create your own board support subdirectory; + Create your own board include/configs/.h file; + } + Edit new board/ files + Edit new include/configs/.h + + while (!accepted) { + while (!running) { + do { + Add / modify source code; + } until (compiles); + Debug; + if (clueless) + email("Hi, I am having problems..."); + } + Send patch file to the U-Boot email list; + if (reasonable critiques) + Incorporate improvements from email list code review; + else + Defend code as written; } - Send patch file to Wolfgang; return 0; }