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Alternate Boot Methods
Additional Procedures A-7
A.4.2 Booting via TFTP Using Board’s NAND Flash File System
To boot in this mode, set the following parameters after you abort the
automatic boot sequence:
EVM # setenv bootcmd 'dhcp;bootm'
EVM # setenv bootargs console=ttyS0,115200n8 ip=dhcp
root=/dev/mtdblock0 rw rootfstype=yaffs2 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
EVM # setenv serverip <tftp server ip address>
EVM # setenv bootfile <kernel image>
EVM # boot
When you boot, look for the following lines that confirm the boot mode:
TFTP from server 192.168.160.71; our IP address is
192.168.161.186
Filename 'library/davinci/0.4.2/uImage'.
...
## Booting image at 80700000 ...
A.4.3 Booting from Flash Using NFS File System
To boot in this mode, set the following parameters after you abort the
automatic boot sequence:
EVM # setenv bootcmd 'nboot 0x80700000 0 0x400000;bootm'
EVM # setenv nfshost <ip addr of nfs host>
EVM # setenv rootpath <directory to mount*>
EVM # setenv bootargs console=ttyS0,115200n8 noinitrd rw
ip=dhcp root=/dev/nfs nfsroot=$(nfshost):$(rootpath),
nolock 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
EVM # boot
*For example, <directory to mount> might be
/home/<useracct>/workdir/filesys.