Texas Instruments TMS320DM357 DVEVM v2.05 manual Restoring the Nand Flash Using NFS

Restoring the NAND Flash

A.6.2 Restoring the NAND Flash Using NFS

Once you have loaded the kernel binary to the corresponding NAND partition as described in Section A.6.1, you can use NFS to populate the YAFFS2 image (dm357_flash_image_#_#_#_#.tar) to the NAND partition. The YAFFS2 image should reside on the NFS Server root directory. Follow these steps:

1)Copy the dm357_flash_image_#_#_#_#.tar file from the DVSDK disk to the NFS mounted root directory. For example, /home/<useracct>/workdir/filesys.

2)Set the bootcmd environment variable to boot to kernel and mount to NFS. (Alternatively use the 'dhcp' command for the EVM IP Address.)

EVM # setenv bootcmd 'nboot 0x80700000 0 0x400000; bootm'

EVM # setenv bootargs console=ttyS0,115200n8 noinitrd

ip=dhcp root=/dev/nfs rw nfsroot=<nfs_host_ip>:<nfs_root_path> mem=232M video=davincifb:vid0=0,2025K:vid1=0,1350K:osd0=720x576x16,

2025K davinci_enc_mgr.ch0_output=COMPOSITE davinci_enc_mgr.ch0_mode=ntsc

Note: These variables need not be saved, because NFS is just a temporary filesystem.

3)Execute the 'boot' command to boot the Linux kernel.

4)Login to the EVM as root and execute the following set of U-Boot commands to mount the NAND partition and populate the YAFFS2 image:

EVM # mkdir /mnt/nand

EVM # flash_eraseall /dev/mtd0

EVM # mount -t yaffs2 /dev/mtdblock0 /mnt/nand/

EVM # cd /mnt/nand

EVM # tar xf /dm357_flash_image_#_#_#_#.tar

EVM # cd

EVM # umount /mnt/nand

EVM # reboot

5)When the EVM comes up after rebooting from the previous steps, press Esc to get back to U-Boot prompt. You can now restore the out- of-the-box U-Boot environment variables as described in Section A.4.1.

Additional Procedures A-13