X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=6272853993205496cf8cd1a6176e54e48badca21;hb=5c6db120fc184bae7a344a4e5da83b21164b59a6;hp=ac61a32adf33c471887111515a9d677a902d4146;hpb=5e2b3e0c59df3313254941b453ffeadba9e673ae;p=u-boot diff --git a/README b/README index ac61a32adf..6272853993 100644 --- a/README +++ b/README @@ -485,6 +485,17 @@ The following options need to be configured: Thumb2 this flag will result in Thumb2 code generated by GCC. + CONFIG_ARM_ERRATA_716044 + CONFIG_ARM_ERRATA_742230 + CONFIG_ARM_ERRATA_743622 + CONFIG_ARM_ERRATA_751472 + + If set, the workarounds for these ARM errata are applied early + during U-Boot startup. Note that these options force the + workarounds to be applied; no CPU-type/version detection + exists, unlike the similar options in the Linux kernel. Do not + set these options unless they apply! + - Linux Kernel Interface: CONFIG_CLOCKS_IN_MHZ @@ -816,6 +827,7 @@ The following options need to be configured: CONFIG_CMD_EEPROM * EEPROM read/write support CONFIG_CMD_ELF * bootelf, bootvx CONFIG_CMD_ENV_CALLBACK * display details about env callbacks + CONFIG_CMD_ENV_FLAGS * display details about env flags CONFIG_CMD_EXPORTENV * export the environment CONFIG_CMD_EXT2 * ext2 command support CONFIG_CMD_EXT4 * ext4 command support @@ -833,7 +845,8 @@ The following options need to be configured: CONFIG_CMD_I2C * I2C serial bus support CONFIG_CMD_IDE * IDE harddisk support CONFIG_CMD_IMI iminfo - CONFIG_CMD_IMLS List all found images + CONFIG_CMD_IMLS List all images found in NOR flash + CONFIG_CMD_IMLS_NAND List all images found in NAND flash CONFIG_CMD_IMMAP * IMMR dump support CONFIG_CMD_IMPORTENV * import an environment CONFIG_CMD_INI * import data from an ini file into the env @@ -848,8 +861,10 @@ The following options need to be configured: CONFIG_CMD_LOADS loads CONFIG_CMD_MD5SUM print md5 message digest (requires CONFIG_CMD_MEMORY and CONFIG_MD5) + CONFIG_CMD_MEMINFO * Display detailed memory information CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, - loop, loopw, mtest + loop, loopw + CONFIG_CMD_MEMTEST mtest CONFIG_CMD_MISC Misc functions like sleep etc CONFIG_CMD_MMC * MMC memory mapped support CONFIG_CMD_MII * MII utility commands @@ -866,6 +881,7 @@ The following options need to be configured: CONFIG_CMD_READ * Read raw data from partition CONFIG_CMD_REGINFO * Register dump CONFIG_CMD_RUN run command in env variable + CONFIG_CMD_SANDBOX * sb command to access sandbox features CONFIG_CMD_SAVES * save S record dump CONFIG_CMD_SCSI * SCSI Support CONFIG_CMD_SDRAM * print SDRAM configuration information @@ -1485,6 +1501,21 @@ CBFS (Coreboot Filesystem) support Normally display is black on white background; define CONFIG_SYS_WHITE_ON_BLACK to get it inverted. + CONFIG_LCD_ALIGNMENT + + Normally the LCD is page-aligned (tyically 4KB). If this is + defined then the LCD will be aligned to this value instead. + For ARM it is sometimes useful to use MMU_SECTION_SIZE + here, since it is cheaper to change data cache settings on + a per-section basis. + + CONFIG_CONSOLE_SCROLL_LINES + + When the console need to be scrolled, this is the number of + lines to scroll by. It defaults to 1. Increasing this makes + the console jump but can help speed up operation when scrolling + is slow. + CONFIG_LCD_BMP_RLE8 Support drawing of RLE8-compressed bitmaps on the LCD. @@ -1494,7 +1525,6 @@ CBFS (Coreboot Filesystem) support Enables an 'i2c edid' command which can read EDID information over I2C from an attached LCD display. - - Splash Screen Support: CONFIG_SPLASH_SCREEN If this option is set, the environment is checked for @@ -1506,6 +1536,17 @@ CBFS (Coreboot Filesystem) support allows for a "silent" boot where a splash screen is loaded very quickly after power-on. + CONFIG_SPLASHIMAGE_GUARD + + If this option is set, then U-Boot will prevent the environment + variable "splashimage" from being set to a problematic address + (see README.displaying-bmps and README.arm-unaligned-accesses). + This option is useful for targets where, due to alignment + restrictions, an improperly aligned BMP image will cause a data + abort. If you think you will not have problems with unaligned + accesses (for example because your toolchain prevents them) + there is no need to set this option. + CONFIG_SPLASH_SCREEN_ALIGN If this option is set the splash image can be freely positioned @@ -1526,6 +1567,14 @@ CBFS (Coreboot Filesystem) support => vertically centered image at x = dspWidth - bmpWidth - 9 + CONFIG_SPLASH_SCREEN_PREPARE + + If this option is set then the board_splash_screen_prepare() + function, which must be defined in your code, is called as part + of the splash screen display sequence. It gives the board an + opportunity to prepare the splash image data before it is + processed and sent to the frame buffer by U-Boot. + - Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP If this option is set, additionally to standard BMP @@ -2188,6 +2237,11 @@ CBFS (Coreboot Filesystem) support serial# is unaffected by this, i. e. it remains read-only.] + The same can be accomplished in a more flexible way + for any variable by configuring the type of access + to allow for those variables in the ".flags" variable + or define CONFIG_ENV_FLAGS_LIST_STATIC. + - Protected RAM: CONFIG_PRAM @@ -2358,6 +2412,15 @@ CBFS (Coreboot Filesystem) support run-time determined information about the hardware to the environment. These will be named board_name, board_rev. + CONFIG_DELAY_ENVIRONMENT + + Normally the environment is loaded when the board is + intialised so that it is available to U-Boot. This inhibits + that so that the environment is not available until + explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL + this is instead controlled by the value of + /config/load-environment. + - DataFlash Support: CONFIG_HAS_DATAFLASH @@ -2384,6 +2447,11 @@ CBFS (Coreboot Filesystem) support CONFIG_SF_DEFAULT_MODE (see include/spi.h) CONFIG_SF_DEFAULT_SPEED in Hz + CONFIG_CMD_SF_TEST + + Define this option to include a destructive SPI flash + test ('sf test'). + - SystemACE Support: CONFIG_SYSTEMACE @@ -2671,10 +2739,13 @@ FIT uImage format: CONFIG_FB_ADDR Define CONFIG_FB_ADDR if you want to use specific - address for frame buffer. - Then system will reserve the frame buffer address to - defined address instead of lcd_setmem (this function - grabs the memory for frame buffer by panel's size). + address for frame buffer. This is typically the case + when using a graphics controller has separate video + memory. U-Boot will then place the frame buffer at + the given address instead of dynamically reserving it + in system RAM by calling lcd_setmem(), which grabs + the memory for the frame buffer depending on the + configured panel size. Please see board_init_f function. @@ -2773,6 +2844,12 @@ FIT uImage format: CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME Filename to read to load U-Boot when reading from FAT + CONFIG_SPL_MPC83XX_WAIT_FOR_NAND + Set this for NAND SPL on PPC mpc83xx targets, so that + start.S waits for the rest of the SPL to load before + continuing (the hardware starts execution after just + loading the first page rather than the full 4K). + CONFIG_SPL_NAND_BASE Include nand_base.c in the SPL. Requires CONFIG_SPL_NAND_DRIVERS. @@ -2830,6 +2907,13 @@ FIT uImage format: CONFIG_SPL_LIBGENERIC_SUPPORT Support for lib/libgeneric.o in SPL binary + CONFIG_SPL_PAD_TO + Image offset to which the SPL should be padded before appending + the SPL payload. By default, this is defined as + CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. + CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL + payload without any padding, or >= CONFIG_SPL_MAX_SIZE. + CONFIG_SPL_TARGET Final target image containing SPL and payload. Some SPLs use an arch-specific makefile fragment instead, for @@ -2969,9 +3053,6 @@ Configuration Settings: non page size aligned address and this could cause major problems. -- CONFIG_SYS_TFTP_LOADADDR: - Default load address for network file downloads - - CONFIG_SYS_LOADS_BAUD_CHANGE: Enable temporary baudrate change while serial download @@ -3113,6 +3194,66 @@ Configuration Settings: cases. This setting can be used to tune behaviour; see lib/hashtable.c for details. +- CONFIG_ENV_FLAGS_LIST_DEFAULT +- CONFIG_ENV_FLAGS_LIST_STATIC + Enable validation of the values given to enviroment variables when + calling env set. Variables can be restricted to only decimal, + hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, + the variables can also be restricted to IP address or MAC address. + + The format of the list is: + type_attribute = [s|d|x|b|i|m] + access_atribute = [a|r|o|c] + attributes = type_attribute[access_atribute] + entry = variable_name[:attributes] + list = entry[,list] + + The type attributes are: + s - String (default) + d - Decimal + x - Hexadecimal + b - Boolean ([1yYtT|0nNfF]) + i - IP address + m - MAC address + + The access attributes are: + a - Any (default) + r - Read-only + o - Write-once + c - Change-default + + - CONFIG_ENV_FLAGS_LIST_DEFAULT + Define this to a list (string) to define the ".flags" + envirnoment variable in the default or embedded environment. + + - CONFIG_ENV_FLAGS_LIST_STATIC + Define this to a list (string) to define validation that + should be done if an entry is not found in the ".flags" + environment variable. To override a setting in the static + list, simply add an entry for the same variable name to the + ".flags" variable. + +- CONFIG_ENV_ACCESS_IGNORE_FORCE + If defined, don't allow the -f switch to env set override variable + access flags. + +- CONFIG_SYS_GENERIC_BOARD + This selects the architecture-generic board system instead of the + architecture-specific board files. It is intended to move boards + to this new framework over time. Defining this will disable the + arch/foo/lib/board.c file and use common/board_f.c and + common/board_r.c instead. To use this option your architecture + must support it (i.e. must define __HAVE_ARCH_GENERIC_BOARD in + its config.mk file). If you find problems enabling this option on + your board please report the problem and send patches! + +- CONFIG_SYS_SYM_OFFSETS + This is set by architectures that use offsets for link symbols + instead of absolute values. So bss_start is obtained using an + offset _bss_start_ofs from CONFIG_SYS_TEXT_BASE, rather than + directly. You should not need to touch this setting. + + The following definitions that deal with the placement and management of environment data (variable area); in general, we support the following configurations: @@ -3388,6 +3529,16 @@ use the "saveenv" command to store a valid environment. space for already greatly restricted images, including but not limited to NAND_SPL configurations. +- CONFIG_DISPLAY_BOARDINFO + Display information about the board that U-Boot is running on + when U-Boot starts up. The board function checkboard() is called + to do this. + +- CONFIG_DISPLAY_BOARDINFO_LATE + Similar to the previous option, but display this information + later, once stdio is running and output goes to the LCD, if + present. + Low Level (hardware related) configuration options: --------------------------------------------------- @@ -3607,9 +3758,13 @@ Low Level (hardware related) configuration options: - CONFIG_SYS_SRIOn_MEM_SIZE: Size of SRIO port 'n' memory region -- CONFIG_SYS_NDFC_16 - Defined to tell the NDFC that the NAND chip is using a - 16 bit bus. +- CONFIG_SYS_NAND_BUSWIDTH_16BIT + Defined to tell the NAND controller that the NAND chip is using + a 16 bit bus. + Not all NAND drivers use this symbol. + Example of drivers that use it: + - drivers/mtd/nand/ndfc.c + - drivers/mtd/nand/mxc_nand.c - CONFIG_SYS_NDFC_EBC0_CFG Sets the EBC0_CFG register for the NDFC. If not defined @@ -3704,21 +3859,29 @@ Low Level (hardware related) configuration options: that is executed before the actual U-Boot. E.g. when compiling a NAND SPL. +- CONFIG_ARCH_MAP_SYSMEM + Generally U-Boot (and in particular the md command) uses + effective address. It is therefore not necessary to regard + U-Boot address as virtual addresses that need to be translated + to physical addresses. However, sandbox requires this, since + it maintains its own little RAM buffer which contains all + addressable memory. This option causes some memory accesses + to be mapped through map_sysmem() / unmap_sysmem(). + - CONFIG_USE_ARCH_MEMCPY CONFIG_USE_ARCH_MEMSET If these options are used a optimized version of memcpy/memset will be used if available. These functions may be faster under some conditions but may increase the binary size. -- CONFIG_X86_NO_RESET_VECTOR - If defined, the x86 reset vector code is excluded. You will need - to do this when U-Boot is running from Coreboot. +- CONFIG_X86_RESET_VECTOR + If defined, the x86 reset vector code is included. This is not + needed when U-Boot is running from Coreboot. -- CONFIG_X86_NO_REAL_MODE - If defined, x86 real mode code is omitted. This assumes a - 32-bit environment where such code is not needed. You will - need to do this when U-Boot is running from Coreboot. +- CONFIG_SYS_MPUCLK + Defines the MPU clock speed (in MHz). + NOTE : currently only supported on AM335x platforms. Freescale QE/FMAN Firmware Support: -----------------------------------