X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=README;h=09662a4a0369b2567f6b8274898b4e8b16af8595;hb=0f740cb8e48eb7c90e7977def98601c929101446;hp=f27e578e7203a48d5f3a85f10affbd2f282933e1;hpb=aeef2b090d0d982f83dd9a64a22a5e7275dd2939;p=karo-tx-uboot.git diff --git a/README b/README index f27e578e72..09662a4a03 100644 --- a/README +++ b/README @@ -139,7 +139,6 @@ Directory Hierarchy: /at91 Files specific to Atmel AT91RM9200 CPU /imx Files specific to Freescale MC9328 i.MX CPUs /s3c24x0 Files specific to Samsung S3C24X0 CPUs - /arm925t Files specific to ARM 925 CPUs /arm926ejs Files specific to ARM 926 CPUs /arm1136 Files specific to ARM 1136 CPUs /ixp Files specific to Intel XScale IXP CPUs @@ -152,9 +151,6 @@ Directory Hierarchy: /blackfin Files generic to Analog Devices Blackfin architecture /cpu CPU specific files /lib Architecture specific library files - /x86 Files generic to x86 architecture - /cpu CPU specific files - /lib Architecture specific library files /m68k Files generic to m68k architecture /cpu CPU specific files /mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs @@ -178,6 +174,9 @@ Directory Hierarchy: /nios2 Files generic to Altera NIOS2 architecture /cpu CPU specific files /lib Architecture specific library files + /openrisc Files generic to OpenRISC architecture + /cpu CPU specific files + /lib Architecture specific library files /powerpc Files generic to PowerPC architecture /cpu CPU specific files /74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs @@ -200,12 +199,16 @@ Directory Hierarchy: /leon2 Files specific to Gaisler LEON2 SPARC CPU /leon3 Files specific to Gaisler LEON3 SPARC CPU /lib Architecture specific library files + /x86 Files generic to x86 architecture + /cpu CPU specific files + /lib Architecture specific library files /api Machine/arch independent API for external apps /board Board dependent files /common Misc architecture independent functions /disk Code for disk drive partition handling /doc Documentation (don't expect too much) /drivers Commonly used device drivers +/dts Contains Makefile for building internal U-Boot fdt. /examples Example code for standalone applications, etc. /fs Filesystem code (cramfs, ext2, jffs2, etc.) /include Header Files @@ -215,7 +218,7 @@ Directory Hierarchy: /lzo Library files to support LZO decompression /net Networking code /post Power On Self Test -/rtc Real Time Clock drivers +/spl Secondary Program Loader framework /tools Tools to build S-Record or U-Boot images, etc. Software Configuration: @@ -941,10 +944,10 @@ The following options need to be configured: - Regular expression support: CONFIG_REGEX - If this variable is defined, U-Boot is linked against - the SLRE (Super Light Regular Expression) library, - which adds regex support to some commands, as for - example "env grep" and "setexpr". + If this variable is defined, U-Boot is linked against + the SLRE (Super Light Regular Expression) library, + which adds regex support to some commands, as for + example "env grep" and "setexpr". - Device tree: CONFIG_OF_CONTROL @@ -1093,8 +1096,8 @@ The following options need to be configured: devices. CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) - The environment variable 'scsidevs' is set to the number of - SCSI devices found during the last scan. + The environment variable 'scsidevs' is set to the number of + SCSI devices found during the last scan. - NETWORK Support (PCI): CONFIG_E1000 @@ -1404,6 +1407,12 @@ The following options need to be configured: CONFIG_DFU_NAND This enables support for exposing NAND devices via DFU. + CONFIG_DFU_RAM + This enables support for exposing RAM via DFU. + Note: DFU spec refer to non-volatile memory usage, but + allow usages beyond the scope of spec - here RAM usage, + one that would help mostly the developer. + CONFIG_SYS_DFU_DATA_BUF_SIZE Dfu transfer uses a buffer before writing data to the raw storage device. Make the size (in bytes) of this buffer @@ -1978,7 +1987,7 @@ CBFS (Coreboot Filesystem) support offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first bus. - - If your board supports a second fsl i2c bus, define + - If your board supports a second fsl i2c bus, define CONFIG_SYS_FSL_I2C2_OFFSET for the register offset CONFIG_SYS_FSL_I2C2_SPEED for the speed and CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the @@ -3182,9 +3191,9 @@ FIT uImage format: CONFIG_TPL_PAD_TO Image offset to which the TPL should be padded before appending the TPL 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_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. Modem Support: -------------- @@ -3359,7 +3368,7 @@ Configuration Settings: the Linux kernel; all data that must be processed by the Linux kernel (bd_info, boot arguments, FDT blob if used) must be put below this limit, unless "bootm_low" - enviroment variable is defined and non-zero. In such case + environment variable is defined and non-zero. In such case all data for the Linux kernel must be between "bootm_low" and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment variable "bootm_mapsize" will override the value of @@ -3472,7 +3481,7 @@ Configuration Settings: - CONFIG_ENV_FLAGS_LIST_DEFAULT - CONFIG_ENV_FLAGS_LIST_STATIC - Enable validation of the values given to enviroment variables when + Enable validation of the values given to environment 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. @@ -5587,15 +5596,17 @@ On ARM, the following registers are used: R0: function argument word/integer result R1-R3: function argument word - R9: GOT pointer - R10: stack limit (used only if stack checking if enabled) + R9: platform specific + R10: stack limit (used only if stack checking is enabled) R11: argument (frame) pointer R12: temporary workspace R13: stack pointer R14: link register R15: program counter - ==> U-Boot will use R8 to hold a pointer to the global data + ==> U-Boot will use R9 to hold a pointer to the global data + + Note: on ARM, only R_ARM_RELATIVE relocations are supported. On Nios II, the ABI is documented here: http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf