X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=README;h=6b6f7227336a1fff884e755ed59cdebdec371881;hb=be0789a8ee024e685f070dbd8c58736ea3891654;hp=ff0df3797d21e63343c4caadf5093423c710368d;hpb=9ff4ce8abc627b8696c9bd6fd726dd1dbf4b9a5c;p=platform%2Fkernel%2Fu-boot.git diff --git a/README b/README index ff0df37..6b6f722 100644 --- a/README +++ b/README @@ -166,27 +166,6 @@ Directory Hierarchy: Software Configuration: ======================= -Configuration is usually done using C preprocessor defines; the -rationale behind that is to avoid dead code whenever possible. - -There are two classes of configuration variables: - -* Configuration _OPTIONS_: - These are selectable by the user and have names beginning with - "CONFIG_". - -* Configuration _SETTINGS_: - These depend on the hardware etc. and should not be meddled with if - you don't know what you're doing; they have names beginning with - "CONFIG_SYS_". - -Previously, all configuration was done by hand, which involved creating -symbolic links and editing configuration files manually. More recently, -U-Boot has added the Kbuild infrastructure used by the Linux kernel, -allowing you to use the "make menuconfig" command to configure your -build. - - Selection of Processor Architecture and Board Type: --------------------------------------------------- @@ -417,12 +396,6 @@ The following options need to be configured: Board config to use DDR3L. It can be enabled for SoCs with DDR3L controllers. - CONFIG_SYS_FSL_IFC_BE - Defines the IFC controller register space as Big Endian - - CONFIG_SYS_FSL_IFC_LE - Defines the IFC controller register space as Little Endian - CONFIG_SYS_FSL_IFC_CLK_DIV Defines divider of platform clock(clock input to IFC controller). @@ -440,11 +413,6 @@ The following options need to be configured: same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But it could be different for ARM SoCs. - CONFIG_SYS_FSL_DDR_INTLV_256B - DDR controller interleaving on 256-byte. This is a special - interleaving mode, handled by Dickens for Freescale layerscape - SoCs with ARM core. - CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS Number of controllers used as main memory. @@ -1330,10 +1298,6 @@ The following options need to be configured: Enables support for FPGA family. (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) - CONFIG_SYS_FPGA_PROG_FEEDBACK - - Enable printing of hash marks during FPGA configuration. - CONFIG_SYS_FPGA_CHECK_BUSY Enable checks on FPGA configuration interface busy @@ -1346,9 +1310,6 @@ The following options need to be configured: If defined, a function that provides delays in the FPGA configuration driver. - CONFIG_SYS_FPGA_CHECK_CTRLC - Allow Control-C to interrupt FPGA configuration - CONFIG_SYS_FPGA_CHECK_ERROR Check for configuration errors during FPGA bitfile @@ -1756,38 +1717,10 @@ Configuration Settings: Enables allocating and saving a kernel copy of the bd_info in space between "bootm_low" and "bootm_low" + BOOTMAPSZ. -- CONFIG_SYS_MAX_FLASH_SECT: - Max number of sectors on a Flash chip - -- CONFIG_SYS_FLASH_ERASE_TOUT: - Timeout for Flash erase operations (in ms) - -- CONFIG_SYS_FLASH_WRITE_TOUT: - Timeout for Flash write operations (in ms) - -- CONFIG_SYS_FLASH_LOCK_TOUT - Timeout for Flash set sector lock bit operation (in ms) - -- CONFIG_SYS_FLASH_UNLOCK_TOUT - Timeout for Flash clear lock bits operation (in ms) - - CONFIG_SYS_FLASH_PROTECTION If defined, hardware flash sectors protection is used instead of U-Boot software protection. -- CONFIG_SYS_DIRECT_FLASH_TFTP: - - Enable TFTP transfers directly to flash memory; - without this option such a download has to be - performed in two steps: (1) download to RAM, and (2) - copy from RAM to flash. - - The two-step approach is usually more reliable, since - you can check if the download worked before you erase - the flash, but in some situations (when system RAM is - too limited to allow for a temporary copy of the - downloaded image) this option may be very useful. - - CONFIG_SYS_FLASH_CFI: Define if the flash driver uses extra elements in the common flash structure for storing flash geometry. @@ -1808,12 +1741,6 @@ Configuration Settings: s29ws-n MirrorBit flash has non-standard addresses for buffered write commands. -- CONFIG_SYS_FLASH_QUIET_TEST - If this option is defined, the common CFI flash doesn't - print it's warning upon not recognized FLASH banks. This - is useful, if some of the configured banks are only - optionally available. - - CONFIG_FLASH_SHOW_PROGRESS If defined (must be an integer), print out countdown digits and dots. Recommended value: 45 (9..1) for 80