X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=README;h=128734134b6b056e52945ba58a764a1b82e7e028;hb=02253d4d12667b99dc7538b0427353a8c8221514;hp=fb331f910d0cf73c7a6f33212a33febb589d14b2;hpb=c90c43cda8c376f949266f920bbb49119aef0b00;p=oweals%2Fu-boot.git diff --git a/README b/README index fb331f910d..128734134b 100644 --- a/README +++ b/README @@ -528,25 +528,6 @@ The following options need to be configured: pointer. This is needed for the temporary stack before relocation. - CONFIG_SYS_MIPS_CACHE_MODE - - Cache operation mode for the MIPS CPU. - See also arch/mips/include/asm/mipsregs.h. - Possible values are: - CONF_CM_CACHABLE_NO_WA - CONF_CM_CACHABLE_WA - CONF_CM_UNCACHED - CONF_CM_CACHABLE_NONCOHERENT - CONF_CM_CACHABLE_CE - CONF_CM_CACHABLE_COW - CONF_CM_CACHABLE_CUW - CONF_CM_CACHABLE_ACCELERATED - - CONFIG_SYS_XWAY_EBU_BOOTCFG - - Special option for Lantiq XWAY SoCs for booting from NOR flash. - See also arch/mips/cpu/mips32/start.S. - CONFIG_XWAY_SWAP_BYTES Enable compilation of tools/xway-swap-bytes needed for Lantiq @@ -874,9 +855,6 @@ The following options need to be configured: CONFIG_EFI_PARTITION GPT partition table, common when EFI is the bootloader. Note 2TB partition limit; see disk/part_efi.c - CONFIG_MTD_PARTITIONS Memory Technology Device partition table. - - If IDE or SCSI support is enabled (CONFIG_IDE or CONFIG_SCSI) you must configure support for at least one non-MTD partition type as well. @@ -980,9 +958,6 @@ The following options need to be configured: Define this to use i/o functions instead of macros (some hardware wont work with macros) - CONFIG_DRIVER_TI_EMAC - Support for davinci emac - CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT Define this if you have more then 3 PHYs. @@ -1171,9 +1146,6 @@ The following options need to be configured: CONFIG_DFU_OVER_USB This enables the USB portion of the DFU USB class - CONFIG_DFU_MMC - This enables support for exposing (e)MMC devices via DFU. - CONFIG_DFU_NAND This enables support for exposing NAND devices via DFU. @@ -1454,15 +1426,6 @@ The following options need to be configured: forwarded through a router. (Environment variable "netmask") -- Multicast TFTP Mode: - CONFIG_MCAST_TFTP - - Defines whether you want to support multicast TFTP as per - rfc-2090; for example to work with atftp. Lets lots of targets - tftp down the same boot image concurrently. Note: the Ethernet - driver in use must provide a function: mcast() to join/leave a - multicast group. - - BOOTP Recovery Mode: CONFIG_BOOTP_RANDOM_DELAY @@ -1733,11 +1696,6 @@ The following options need to be configured: - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 - - drivers/i2c/zynq_i2c.c - - activate this driver with CONFIG_SYS_I2C_ZYNQ - - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting - - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr - - drivers/i2c/s3c24x0_i2c.c: - activate this driver with CONFIG_SYS_I2C_S3C24X0 - This driver adds i2c buses (11 for Exynos5250, Exynos5420 @@ -1957,14 +1915,6 @@ The following options need to be configured: SPI configuration items (port pins to use, etc). For an example, see include/configs/sacsng.h. - CONFIG_HARD_SPI - - Enables a hardware SPI driver for general-purpose reads - and writes. As with CONFIG_SOFT_SPI, the board configuration - must define a list of chip-select function pointers. - Currently supported on some MPC8xxx processors. For an - example, see include/configs/mpc8349emds.h. - CONFIG_SYS_SPI_MXC_WAIT Timeout for waiting until spi transfer completed. default: (CONFIG_SYS_HZ/100) /* 10 ms */ @@ -2031,13 +1981,6 @@ The following options need to be configured: 200 ms. - Configuration Management: - CONFIG_BUILD_TARGET - - Some SoCs need special image types (e.g. U-Boot binary - with a special header) as build targets. By defining - CONFIG_BUILD_TARGET in the SoC / board header, this - special image will be automatically built upon calling - make / buildman. CONFIG_IDENT_STRING @@ -2433,17 +2376,6 @@ FIT uImage format: 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. - -- UBI support CONFIG_MTD_UBI_WL_THRESHOLD This parameter defines the maximum difference between the highest erase counter value and the lowest erase counter value of eraseblocks @@ -2625,6 +2557,10 @@ FIT uImage format: CONFIG_SPL_NAND_DRIVERS SPL uses normal NAND drivers, not minimal drivers. + CONFIG_SPL_NAND_IDENT + SPL uses the chip ID list to identify the NAND flash. + Requires CONFIG_SPL_NAND_BASE. + CONFIG_SPL_NAND_ECC Include standard software ECC in the SPL @@ -3028,11 +2964,6 @@ Configuration Settings: If defined, don't allow the -f switch to env set override variable access flags. -- CONFIG_USE_STDINT - If stdint.h is available with your toolchain you can define this - option to enable it. You can provide option 'USE_STDINT=1' when - building U-Boot to enable this. - The following definitions that deal with the placement and management of environment data (variable area); in general, we support the following configurations: @@ -3274,8 +3205,8 @@ Low Level (hardware related) configuration options: 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 + - drivers/mtd/nand/raw/ndfc.c + - drivers/mtd/nand/raw/mxc_nand.c - CONFIG_SYS_NDFC_EBC0_CFG Sets the EBC0_CFG register for the NDFC. If not defined @@ -3392,7 +3323,7 @@ Low Level (hardware related) configuration options: - CONFIG_SYS_NAND_NO_SUBPAGE_WRITE Option to disable subpage write in NAND driver driver that uses this: - drivers/mtd/nand/davinci_nand.c + drivers/mtd/nand/raw/davinci_nand.c Freescale QE/FMAN Firmware Support: ----------------------------------- @@ -3953,6 +3884,17 @@ If CONFIG_REGEX is defined, the variable_name above is evaluated as a regular expression. This allows multiple variables to be connected to the same callback without explicitly listing them all out. +The signature of the callback functions is: + + int callback(const char *name, const char *value, enum env_op op, int flags) + +* name - changed environment variable +* value - new value of the environment variable +* op - operation (create, overwrite, or delete) +* flags - attributes of the environment variable change, see flags H_* in + include/search.h + +The return value is 0 if the variable change is accepted and 1 otherwise. Command Line Parsing: =====================