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