X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=README;h=ec1b50c30551bd959fe2e374770973a55e37ccbe;hb=e45d22655aed0c81fa5890f47c1647c6e95bedb6;hp=2c4bde0b32973d00d2abda5b48c747fcdfc87f0e;hpb=e5f6fecda4a606acd2417fb537f331e37c757fa5;p=platform%2Fkernel%2Fu-boot.git diff --git a/README b/README index 2c4bde0..ec1b50c 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: --------------------------------------------------- @@ -315,17 +294,6 @@ The following options need to be configured: the "64" category of the Power ISA). This is necessary for ePAPR compliance, among other possible reasons. - CONFIG_SYS_FSL_TBCLK_DIV - - Defines the core time base clock divider ratio compared to the - system clock. On most PQ3 devices this is 8, on newer QorIQ - devices it can be 16 or 32. The ratio varies from SoC to Soc. - - CONFIG_SYS_FSL_PCIE_COMPAT - - Defines the string to utilize when trying to match PCIe device - tree nodes for the given platform. - CONFIG_SYS_FSL_ERRATUM_A004510 Enables a workaround for erratum A004510. If set, @@ -351,31 +319,12 @@ The following options need to be configured: This is the value to write into CCSR offset 0x18600 according to the A004510 workaround. - CONFIG_SYS_FSL_DSP_DDR_ADDR - This value denotes start offset of DDR memory which is - connected exclusively to the DSP cores. - - CONFIG_SYS_FSL_DSP_M2_RAM_ADDR - This value denotes start offset of M2 memory - which is directly connected to the DSP core. - - CONFIG_SYS_FSL_DSP_M3_RAM_ADDR - This value denotes start offset of M3 memory which is directly - connected to the DSP core. - - CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT - This value denotes start offset of DSP CCSR space. - CONFIG_SYS_FSL_SINGLE_SOURCE_CLK Single Source Clock is clocking mode present in some of FSL SoC's. In this mode, a single differential clock is used to supply clocks to the sysclock, ddrclock and usbclock. - Generic CPU options: - CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN - - Defines the endianess of the CPU. Implementation of those - values is arch specific. CONFIG_SYS_FSL_DDR Freescale DDR driver in use. This type of DDR controller is @@ -384,79 +333,17 @@ The following options need to be configured: CONFIG_SYS_FSL_DDR_ADDR Freescale DDR memory-mapped register base. - CONFIG_SYS_FSL_DDRC_GEN1 - Freescale DDR1 controller. - - CONFIG_SYS_FSL_DDRC_GEN2 - Freescale DDR2 controller. - - CONFIG_SYS_FSL_DDRC_GEN3 - Freescale DDR3 controller. - - CONFIG_SYS_FSL_DDRC_GEN4 - Freescale DDR4 controller. - - CONFIG_SYS_FSL_DDRC_ARM_GEN3 - Freescale DDR3 controller for ARM-based SoCs. - - CONFIG_SYS_FSL_DDR1 - Board config to use DDR1. It can be enabled for SoCs with - Freescale DDR1 or DDR2 controllers, depending on the board - implemetation. - - CONFIG_SYS_FSL_DDR2 - Board config to use DDR2. It can be enabled for SoCs with - Freescale DDR2 or DDR3 controllers, depending on the board - implementation. - - CONFIG_SYS_FSL_DDR3 - Board config to use DDR3. It can be enabled for SoCs with - Freescale DDR3 or DDR3L controllers. - - CONFIG_SYS_FSL_DDR3L - 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). CONFIG_SYS_FSL_LBC_CLK_DIV Defines divider of platform clock(clock input to eLBC controller). - CONFIG_SYS_FSL_DDR_BE - Defines the DDR controller register space as Big Endian - - CONFIG_SYS_FSL_DDR_LE - Defines the DDR controller register space as Little Endian - CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY Physical address from the view of DDR controllers. It is the 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. - - CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS - Number of controllers used for other than main memory. - - CONFIG_SYS_FSL_SEC_BE - Defines the SEC controller register space as Big Endian - - CONFIG_SYS_FSL_SEC_LE - Defines the SEC controller register space as Little Endian - - MIPS CPU options: CONFIG_XWAY_SWAP_BYTES @@ -528,8 +415,6 @@ The following options need to be configured: the defaults discussed just above. - Cache Configuration for ARM: - CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache - controller CONFIG_SYS_PL310_BASE - Physical base address of PL310 controller register space @@ -678,20 +563,6 @@ The following options need to be configured: CONFIG_LAN91C96_USE_32_BIT Define this to enable 32 bit addressing - CONFIG_SMC91111 - Support for SMSC's LAN91C111 chip - - CONFIG_SMC91111_BASE - Define this to hold the physical address - of the device (I/O space) - - CONFIG_SMC_USE_32_BIT - Define this if data bus is 32 bits - - CONFIG_SMC_USE_IOFUNCS - Define this to use i/o functions instead of macros - (some hardware wont work with macros) - CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT Define this if you have more then 3 PHYs. @@ -899,80 +770,6 @@ The following options need to be configured: - Keyboard Support: See Kconfig help for available keyboard drivers. -- LCD Support: CONFIG_LCD - - Define this to enable LCD support (for output to LCD - display); also select one of the supported displays - by defining one of these: - - CONFIG_NEC_NL6448AC33: - - NEC NL6448AC33-18. Active, color, single scan. - - CONFIG_NEC_NL6448BC20 - - NEC NL6448BC20-08. 6.5", 640x480. - Active, color, single scan. - - CONFIG_NEC_NL6448BC33_54 - - NEC NL6448BC33-54. 10.4", 640x480. - Active, color, single scan. - - CONFIG_SHARP_16x9 - - Sharp 320x240. Active, color, single scan. - It isn't 16x9, and I am not sure what it is. - - CONFIG_SHARP_LQ64D341 - - Sharp LQ64D341 display, 640x480. - Active, color, single scan. - - CONFIG_HLD1045 - - HLD1045 display, 640x480. - Active, color, single scan. - - CONFIG_OPTREX_BW - - Optrex CBL50840-2 NF-FW 99 22 M5 - or - Hitachi LMG6912RPFC-00T - or - Hitachi SP14Q002 - - 320x240. Black & white. - - CONFIG_LCD_ALIGNMENT - - Normally the LCD is page-aligned (typically 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_LCD_ROTATION - - Sometimes, for example if the display is mounted in portrait - mode or even if it's mounted landscape but rotated by 180degree, - we need to rotate our content of the display relative to the - framebuffer, so that user can read the messages which are - printed out. - Once CONFIG_LCD_ROTATION is defined, the lcd_console will be - initialized with a given rotation from "vl_rot" out of - "vidinfo_t" which is provided by the board specific code. - The value for vl_rot is coded as following (matching to - fbcon=rotate: linux-kernel commandline): - 0 = no rotation respectively 0 degree - 1 = 90 degree rotation - 2 = 180 degree rotation - 3 = 270 degree rotation - - If CONFIG_LCD_ROTATION is not defined, the console will be - initialized with 0degree rotation. - - MII/PHY support: CONFIG_PHY_CLOCK_FREQ (ppc4xx) @@ -1749,38 +1546,10 @@ 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. @@ -1801,12 +1570,6 @@ 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