1------------------------------------------------------------------ 2Freescale PBL(pre-boot loader) Boot Image generation using mkimage 3------------------------------------------------------------------ 4 5The CoreNet SoC's can boot directly from eSPI FLASH, SD/MMC and 6NAND, etc. These SoCs use PBL to load RCW and/or pre-initialization 7instructions. For more details refer section 5 Pre-boot loader 8specifications of reference manual P3041RM/P4080RM/P5020RM at link: 9http://www.freescale.com/webapp/search/Serp.jsp?Reference+Manuals 10 11Building PBL Boot Image and boot steps 12-------------------------------------- 13 141. Building PBL Boot Image. 15 The default Image is u-boot.pbl. 16 17 For eSPI boot(available on P3041/P4080/P5020): 18 To build the eSPI boot image: 19 make <board_name>_SPIFLASH_config 20 make u-boot.pbl 21 22 For SD boot(available on P3041/P4080/P5020): 23 To build the SD boot image: 24 make <board_name>_SDCARD_config 25 make u-boot.pbl 26 27 For Nand boot(available on P3041/P5020): 28 To build the NAND boot image: 29 make <board_name>_NAND_config 30 make u-boot.pbl 31 32 332. pblimage support available with mkimage utility will generate Freescale PBL 34boot image that can be flashed on the board eSPI flash, SD/MMC and NAND. 35Following steps describe it in detail. 36 37 1). Boot from eSPI flash 38 Write u-boot.pbl to eSPI flash from offset 0x0. 39 for ex in u-boot: 40 =>tftp 100000 u-boot.pbl 41 =>sf probe 0 42 =>sf erase 0 100000 43 =>sf write 100000 0 $filesize 44 Change SW1[1:5] = off off on off on. 45 46 2). Boot from SD/MMC 47 Write u-boot.pbl to SD/MMC from offset 0x1000. 48 for ex in u-boot: 49 =>tftp 100000 u-boot.pbl 50 =>mmcinfo 51 =>mmc write 100000 8 441 52 Change SW1[1:5] = off off on on off. 53 54 3). Boot from Nand 55 Write u-boot.pbl to Nand from offset 0x0. 56 for ex in u-boot: 57 =>tftp 100000 u-boot.pbl 58 =>nand info 59 =>nand erase 0 100000 60 =>nand write 100000 0 $filesize 61 Change SW1[1:5] = off on off off on 62 Change SW7[1:4] = on off off on 63 64Board specific configuration file specifications: 65------------------------------------------------ 661. Configuration files rcw.cfg and pbi.cfg must present in the 67board/freescale/corenet_ds/, rcw.cfg is for RCW, pbi.cfg is for 68PBI instructions. File name must not be changed since they are used 69in Makefile. 702. These files can have empty lines and lines starting with "#" as first 71character to put comments 72 73Typical example of rcw.cfg file: 74----------------------------------- 75 76#PBL preamble and RCW header 77aa55aa55 010e0100 78#64 bytes RCW data 794c580000 00000000 18185218 0000cccc 8040464000 3c3c2000 58000000 61000000 8100000000 00000000 00000000 008b6000 8200000000 00000000 00000000 00000000 83 84Typical example of pbi.cfg file: 85----------------------------------- 86 87#PBI commands 88#Initialize CPC1 8909010000 00200400 9009138000 00000000 91091380c0 00000100 9209010100 00000000 9309010104 fff0000b 9409010f00 08000000 9509010000 80000000 96#Configure LAW for CPC1 9709000d00 00000000 9809000d04 fff00000 9909000d08 81000013 10009000010 00000000 10109000014 ff000000 10209000018 81000000 103#Initialize eSPI controller 10409110000 80000403 10509110020 2d170008 10609110024 00100008 10709110028 00100008 1080911002c 00100008 109#Flush PBL data 11009138000 00000000 111091380c0 00000000 112 113------------------------------------------------ 114Author: Shaohui Xie<Shaohui.Xie@freescale.com> 115