Re: [U-Boot-Users] [PATCH v4 8/9] ata: add the readme for SATA command line

Hi Dave,

Proposed English polishing.

Best regards, gvb

Dave Liu wrote:

Signed-off-by: Dave Liu daveliu@freescale.com

doc/README.sata | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 69 insertions(+), 0 deletions(-) create mode 100644 doc/README.sata

diff --git a/doc/README.sata b/doc/README.sata new file mode 100644 index 0000000..5cc69db --- /dev/null +++ b/doc/README.sata @@ -0,0 +1,69 @@ +1. SATA usage in U-boot

• Two ways to operate the hard disk

There are two ways to operate the hard disk

• • Raw read/write block from/to SATA hard disk;

* Read/write raw blocks from/to the SATA hard disk

• • ext2load read file from ext2 filesytem in hard disk

* ext2load to read a file from an ext2 file system

+1.0 How to know the information of SATA hard disk?

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 save the kernel, filesystem, dtb to SATA hard disk with raw?

1.1 How to raw write the kernel, file system, dtb to a SATA hard disk?

• Notes: 0x1000 sectors = 2 MBytes

Notes: Hard disk sectors are normally 512 bytes, so 0x1000 sectors = 2 MBytes

• wirte kernel

s/wirte/write/

• => 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?

1.2 How to raw read the kernel, filesystem, 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 image from ext2 filesystem in U-boot?

1.3 How to load an image from an ext2 file system 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.
  

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