--------------------------------------------- Kirkwood Boot Image generation using mkimage --------------------------------------------- This document describes the U-Boot feature as it is implemented for the Kirkwood family of SoCs. The Kirkwood SoC's can boot directly from NAND FLASH, SPI FLASH, SATA etc. using its internal bootRom support. for more details refer section 24.2 of Kirkwood functional specifications. ref: www.marvell.com/products/embedded.../kirkwood/index.jsp Command syntax: -------------- ./tools/mkimage -l to list the kwb image file details ./tools/mkimage -n \ -T kwbimage -a -e \ -d for ex. ./tools/mkimage -n ./board/Marvell/openrd_base/kwbimage.cfg \ -T kwbimage -a 0x00600000 -e 0x00600000 \ -d u-boot.bin u-boot.kwb kwbimage support available with mkimage utility will generate kirkwood boot image that can be flashed on the board NAND/SPI flash. The make target which uses mkimage to produce such an image is "u-boot.kwb". For example: export KBUILD_OUTPUT=/tmp/build make distclean make yourboard_config make u-boot.kwb Board specific configuration file specifications: ------------------------------------------------ 1. This file must present in the $(BOARDDIR). The default name is kwbimage.cfg. The name can be set as part of the full path to the file using CONFIG_SYS_KWD_CONFIG (probably in include/configs/.h). The path should look like: $(CONFIG_BOARDDIR)/.cfg 2. This file can have empty lines and lines starting with "#" as first character to put comments 3. This file can have configuration command lines as mentioned below, any other information in this file is treated as invalid. Configuration command line syntax: --------------------------------- 1. Each command line is must have two strings, first one command or address and second one data string 2. Following are the valid command strings and associated data strings:- Command string data string -------------- ----------- BOOT_FROM nand/spi/sata NAND_ECC_MODE default/rs/hamming/disabled NAND_PAGE_SIZE any uint16_t hex value SATA_PIO_MODE any uint32_t hex value DDR_INIT_DELAY any uint32_t hex value DATA regaddr and regdara hex value you can have maximum 55 such register programming commands 3. All commands are optional to program Typical example of kwimage.cfg file: ----------------------------------- # Boot Media configurations BOOT_FROM nand NAND_ECC_MODE default NAND_PAGE_SIZE 0x0800 # Configure RGMII-0 interface pad voltage to 1.8V DATA 0xFFD100e0 0x1b1b1b9b # DRAM Configuration DATA 0xFFD01400 0x43000c30 DATA 0xFFD01404 0x37543000 DATA 0xFFD01408 0x22125451 DATA 0xFFD0140C 0x00000a33 DATA 0xFFD01410 0x000000cc DATA 0xFFD01414 0x00000000 DATA 0xFFD01418 0x00000000 DATA 0xFFD0141C 0x00000C52 DATA 0xFFD01420 0x00000040 DATA 0xFFD01424 0x0000F17F DATA 0xFFD01428 0x00085520 DATA 0xFFD0147C 0x00008552 DATA 0xFFD01504 0x0FFFFFF1 DATA 0xFFD01508 0x10000000 DATA 0xFFD0150C 0x0FFFFFF5 DATA 0xFFD01514 0x00000000 DATA 0xFFD0151C 0x00000000 DATA 0xFFD01494 0x00030000 DATA 0xFFD01498 0x00000000 DATA 0xFFD0149C 0x0000E803 DATA 0xFFD01480 0x00000001 # End of Header extension DATA 0x0 0x0 ------------------------------------------------ Author: Prafulla Wadaskar