[ d ] booting from nfs

booting from nfs on u-boot environment settiing
#setenv netmask 255.255.0.0
#setenv serverip 192.168.1.101
#setenv ipaddr 192.168.1.102
#setenv rootpath /work/nfs
#setenv bootcmd 'tftpboot 0x2000000 $(image_name);setenv bootargs console=ttyS0,115200 root=/dev/nfs nfsroot=$(serverip):$(rootpath) ip=$(ipaddr):$(serverip):::orion:eth0:none usb0Mode=host usb1Mode=host; bootm 0x2000000'