bootcmd和bootargs环境变量

从网络启动

setenv bootargs 'console=tty0 console=ttymxc0,115200 root=/dev/mmcblk1p2 rootwait rw'
setenv bootcmd 'tftp 80800000 zImage; tftp 83000000 imx6ull-alientek-emmc.dtb; bootz 80800000 - 83000000'
saveenv

直接从MMC中读取

setenv bootargs 'console=tty0 console=ttymxc0,115200 root=/dev/mmcblk1p2 rootwait rw'
setenv bootcmd 'mmc dev 1; fatload mmc 1:1 80800000 zImage; fatload mmc 1:1 83000000 imx6ull-alientek-emmc.dtb; bootz 80800000 - 83000000;'
saveenv

setenv bootargs 'console=tty0 console=ttymxc0,115200 root=/dev/mmcblk1p2 rootwait rw'
setenv bootcmd 'mmc dev 1; fatload mmc 1:1 80800000 zImage; fatload mmc 1:1 83000000 imx6ull-14x14-emmc-4.3-800x480-c.dtb; bootz 80800000 - 83000000;'
saveenv

cp arch/arm/boot/zImage /home/zhiguoxin/linux/tftp -f
cp arch/arm/boot/dts/imx6ull-14x14-evk.dtb /home/zhiguoxin/linux/tftp -f