uboot/doc/README.pblimage
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   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