u-boot/doc/README.pblimage

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2 Freescale PBL(pre-boot loader) Boot Image generation using mkimage
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5 The CoreNet SoC's can boot directly from eSPI FLASH, SD/MMC and
6 NAND, etc. These SoCs use PBL to load RCW and/or pre-initialization
7 instructions. For more details refer section 5 Pre-boot loader
11 Building PBL Boot Image and boot steps
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14 1. Building PBL Boot Image.
15    The default Image is u-boot.pbl.
17    For eSPI boot(available on P2041/P3041/P4080/P5020/P5040/T4240):
18 	To build the eSPI boot image:
21    For SD boot(available on P2041/P3041/P4080/P5020/P5040/T4240):
22 	To build the SD boot image:
25    For Nand boot(available on P2041/P3041/P5020/P5040):
26 	To build the NAND boot image:
31 boot image that can be flashed on the board eSPI flash, SD/MMC and NAND.
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
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
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
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