README.sata
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1. SATA usage in U-boot
There are two ways to operate the hard disk
* Read/write raw blocks from/to SATA hard disk
* ext2load to read a file from ext2 file system
1.0 How to read the SATA hard disk's information?
=> 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 raw write the kernel, file system, dtb to a SATA hard disk?
Notes: Hard disk sectors are normally 512 bytes, so
0x1000 sectors = 2 MBytes
write 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 raw read the kernel, file system, dtb from a SATA hard disk?
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 an image from an ext2 file system in U-boot?
U-boot doesn't support writing to an ext2 file system, so the
files must be written by other means (e.g. linux).
=> 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