setenv  bootargs 'console=ttymxc0,115200 root=/dev/nfs nfsroot=192.168.2.100:/home/alientek/linux/nfs/rootfs,proto=tcp rw ip=192.168.2.220:192.168.2.100:192.168.2.1:255.255.255.0::eth0:off'
setenv bootcmd 'tftp 80800000 zImage;tftp 83000000 imx6ull-14x14-evk-emmc.dtb;bootz 80800000 - 83000000'
mmc erase 0 9999999
mmc info