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 P2041/P3041/P4080/P5020/P5040/T4240): 18 To build the eSPI boot image: 19 make <board_name>_SPIFLASH 20 21 For SD boot(available on P2041/P3041/P4080/P5020/P5040/T4240): 22 To build the SD boot image: 23 make <board_name>_SDCARD 24 25 For Nand boot(available on P2041/P3041/P5020/P5040): 26 To build the NAND boot image: 27 make <board_name>_NAND 28 29 302. pblimage support available with mkimage utility will generate Freescale PBL 31boot image that can be flashed on the board eSPI flash, SD/MMC and NAND. 32Following steps describe it in detail. 33 34 1). Boot from eSPI flash 35 Write u-boot.pbl to eSPI flash from offset 0x0. 36 for ex in u-boot: 37 =>tftp 100000 u-boot.pbl 38 =>sf probe 0 39 =>sf erase 0 100000 40 =>sf write 100000 0 $filesize 41 Change SW1[1:5] = off off on off on. 42 43 2). Boot from SD/MMC 44 Write u-boot.pbl to SD/MMC from offset 0x1000. 45 for ex in u-boot: 46 =>tftp 100000 u-boot.pbl 47 =>mmcinfo 48 =>mmc write 100000 8 441 49 Change SW1[1:5] = off off on on off. 50 51 3). Boot from Nand 52 Write u-boot.pbl to Nand from offset 0x0. 53 for ex in u-boot: 54 =>tftp 100000 u-boot.pbl 55 =>nand info 56 =>nand erase 0 100000 57 =>nand write 100000 0 $filesize 58 Change SW1[1:5] = off on off off on 59 Change SW7[1:4] = on off off on 60 61Board specific configuration file specifications: 62------------------------------------------------ 631. Configuration files rcw.cfg and pbi.cfg must present in the 64board/freescale/corenet_ds/, rcw.cfg is for RCW, pbi.cfg is for 65PBI instructions. File name must not be changed since they are used 66in Makefile. 672. These files can have empty lines and lines starting with "#" as first 68character to put comments 69 70Typical example of rcw.cfg file: 71----------------------------------- 72 73#PBL preamble and RCW header 74aa55aa55 010e0100 75#64 bytes RCW data 764c580000 00000000 18185218 0000cccc 7740464000 3c3c2000 58000000 61000000 7800000000 00000000 00000000 008b6000 7900000000 00000000 00000000 00000000 80 81Typical example of pbi.cfg file: 82----------------------------------- 83 84#PBI commands 85#Initialize CPC1 8609010000 00200400 8709138000 00000000 88091380c0 00000100 8909010100 00000000 9009010104 fff0000b 9109010f00 08000000 9209010000 80000000 93#Configure LAW for CPC1 9409000d00 00000000 9509000d04 fff00000 9609000d08 81000013 9709000010 00000000 9809000014 ff000000 9909000018 81000000 100#Initialize eSPI controller 10109110000 80000403 10209110020 2d170008 10309110024 00100008 10409110028 00100008 1050911002c 00100008 106#Flush PBL data 10709138000 00000000 108091380c0 00000000 109 110------------------------------------------------ 111Author: Shaohui Xie<Shaohui.Xie@freescale.com> 112