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diff --git a/qemu/roms/u-boot/doc/README.pblimage b/qemu/roms/u-boot/doc/README.pblimage new file mode 100644 index 000000000..7fdd26b71 --- /dev/null +++ b/qemu/roms/u-boot/doc/README.pblimage @@ -0,0 +1,111 @@ +------------------------------------------------------------------ +Freescale PBL(pre-boot loader) Boot Image generation using mkimage +------------------------------------------------------------------ + +The CoreNet SoC's can boot directly from eSPI FLASH, SD/MMC and +NAND, etc. These SoCs use PBL to load RCW and/or pre-initialization +instructions. For more details refer section 5 Pre-boot loader +specifications of reference manual P3041RM/P4080RM/P5020RM at link: +http://www.freescale.com/webapp/search/Serp.jsp?Reference+Manuals + +Building PBL Boot Image and boot steps +-------------------------------------- + +1. Building PBL Boot Image. + The default Image is u-boot.pbl. + + For eSPI boot(available on P2041/P3041/P4080/P5020/P5040/T4240): + To build the eSPI boot image: + make <board_name>_SPIFLASH + + For SD boot(available on P2041/P3041/P4080/P5020/P5040/T4240): + To build the SD boot image: + make <board_name>_SDCARD + + For Nand boot(available on P2041/P3041/P5020/P5040): + To build the NAND boot image: + make <board_name>_NAND + + +2. pblimage support available with mkimage utility will generate Freescale PBL +boot image that can be flashed on the board eSPI flash, SD/MMC and NAND. +Following steps describe it in detail. + + 1). Boot from eSPI flash + Write u-boot.pbl to eSPI flash from offset 0x0. + for ex in u-boot: + =>tftp 100000 u-boot.pbl + =>sf probe 0 + =>sf erase 0 100000 + =>sf write 100000 0 $filesize + Change SW1[1:5] = off off on off on. + + 2). Boot from SD/MMC + Write u-boot.pbl to SD/MMC from offset 0x1000. + for ex in u-boot: + =>tftp 100000 u-boot.pbl + =>mmcinfo + =>mmc write 100000 8 441 + Change SW1[1:5] = off off on on off. + + 3). Boot from Nand + Write u-boot.pbl to Nand from offset 0x0. + for ex in u-boot: + =>tftp 100000 u-boot.pbl + =>nand info + =>nand erase 0 100000 + =>nand write 100000 0 $filesize + Change SW1[1:5] = off on off off on + Change SW7[1:4] = on off off on + +Board specific configuration file specifications: +------------------------------------------------ +1. Configuration files rcw.cfg and pbi.cfg must present in the +board/freescale/corenet_ds/, rcw.cfg is for RCW, pbi.cfg is for +PBI instructions. File name must not be changed since they are used +in Makefile. +2. These files can have empty lines and lines starting with "#" as first +character to put comments + +Typical example of rcw.cfg file: +----------------------------------- + +#PBL preamble and RCW header +aa55aa55 010e0100 +#64 bytes RCW data +4c580000 00000000 18185218 0000cccc +40464000 3c3c2000 58000000 61000000 +00000000 00000000 00000000 008b6000 +00000000 00000000 00000000 00000000 + +Typical example of pbi.cfg file: +----------------------------------- + +#PBI commands +#Initialize CPC1 +09010000 00200400 +09138000 00000000 +091380c0 00000100 +09010100 00000000 +09010104 fff0000b +09010f00 08000000 +09010000 80000000 +#Configure LAW for CPC1 +09000d00 00000000 +09000d04 fff00000 +09000d08 81000013 +09000010 00000000 +09000014 ff000000 +09000018 81000000 +#Initialize eSPI controller +09110000 80000403 +09110020 2d170008 +09110024 00100008 +09110028 00100008 +0911002c 00100008 +#Flush PBL data +09138000 00000000 +091380c0 00000000 + +------------------------------------------------ +Author: Shaohui Xie<Shaohui.Xie@freescale.com> |