Commit bede87f4 authored by Dave Liu's avatar Dave Liu Committed by Wolfgang Denk

ata: add the readme for SATA command line

Signed-off-by: default avatarDave Liu <daveliu@freescale.com>
parent cd54081c
1. SATA usage in U-boot
Two ways to operate the hard disk
* Raw read/write block from/to SATA hard disk;
* ext2load read file from ext2 filesytem in hard disk
1.0 How to know the information of SATA hard disk?
=> sata info
SATA device 0: Model: ST3320620AS Firm: 3.AAD Ser#: 4QF01ZTN
Type: Hard Disk
Supports 48-bit addressing
Capacity: 305245.3 MB = 298.0 GB (625142448 x 512)
1.1 How to save the kernel, filesystem, dtb to SATA hard disk with raw?
Notes: 0x1000 sectors = 2 MBytes
wirte kernel
=> tftp 40000 /tftpboot/uImage.837x
=> sata write 40000 0 2000
write ramdisk
=> tftp 40000 /tftpboot/ramdisk.837x
=> sata write 40000 2000 8000
write dtb
=> tftp 40000 /tftpboot/mpc837xemds.dtb
=> sata write 40000 a000 1000
1.2 How to read the kernel, filesystem, dtb from SATA hard disk with raw?
load kernel
=> sata read 200000 0 2000
load ramdisk
=> sata read 1000000 2000 8000
load dtb
=> sata read 2000000 a000 1000
boot
=> bootm 200000 1000000 2000000
1.3 How to load image from ext2 filesystem in U-boot?
U-boot doesn't support ext2 write to hard disk, so
you have to write the image to hard disk under Linux env,
before you load image from ext2 filesystem.
=> ext2ls sata 0:1 /
<DIR> 4096 .
<DIR> 4096 ..
<DIR> 16384 lost+found
1352023 uImage.837x
3646377 ramdisk.837x
12288 mpc837xemds.dtb
12 hello.txt
=> ext2load sata 0:1 200000 /uImage.837x
=> ext2load sata 0:1 1000000 /ramdisk.837x
=> ext2load sata 0:1 2000000 /mpc837xemds.dtb
=> bootm 200000 1000000 2000000
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