X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=README;h=f7ed7eaae16c8460625a6b38727dfab3db7fdb9e;hb=9cdbc906721454b2db57dc2a38d236c35900960d;hp=a15a3dd39bd23b7ac939514da51b6916d6e3dbd4;hpb=002c3234e63303062fdc7511ef69be1fdda3093c;p=oweals%2Fu-boot.git diff --git a/README b/README index a15a3dd39b..f7ed7eaae1 100644 --- a/README +++ b/README @@ -1,9 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0+ # # (C) Copyright 2000 - 2013 # Wolfgang Denk, DENX Software Engineering, wd@denx.de. -# -# SPDX-License-Identifier: GPL-2.0+ -# Summary: ======== @@ -333,11 +331,6 @@ The following options need to be configured: - Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. -- Marvell Family Member - CONFIG_SYS_MVFS - define it if you want to enable - multiple fs option at one time - for marvell soc family - - 85xx CPU Options: CONFIG_SYS_PPC64 @@ -535,25 +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 @@ -881,9 +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. @@ -987,9 +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. @@ -1174,10 +1142,6 @@ The following options need to be configured: CONFIG_SUPPORT_EMMC_BOOT Enable some additional features of the eMMC boot partitions. - CONFIG_SUPPORT_EMMC_RPMB - Enable the commands for reading, writing and programming the - key for the Replay Protection Memory Block partition in eMMC. - - USB Device Firmware Update (DFU) class support: CONFIG_DFU_OVER_USB This enables the USB portion of the DFU USB class @@ -2444,17 +2408,6 @@ 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 @@ -2636,6 +2589,10 @@ 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 @@ -2697,7 +2654,7 @@ FIT uImage format: use an arch-specific makefile fragment instead, for example if more than one image needs to be produced. - CONFIG_FIT_SPL_PRINT + CONFIG_SPL_FIT_PRINT Printing information about a FIT image adds quite a bit of code to SPL. So this is normally disabled in SPL. Use this option to re-enable it. This will affect the output of the @@ -3039,11 +2996,6 @@ 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: @@ -3964,6 +3916,17 @@ 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: =====================