package/boot/uboot-sunxi/uEnv-a64.txt

   1 setenv loadkernel fatload mmc 0 \$kernel_addr_r uImage
   2 setenv loaddtb fatload mmc 0 \$fdt_addr_r dtb
   3 setenv bootargs console=ttyS0,115200 earlyprintk root=/dev/mmcblk0p2 rootwait earlycon=uart,mmio32,0x01c28000
   4 setenv uenvcmd run loadkernel \&\& run loaddtb \&\& booti \$kernel_addr_r - \$fdt_addr_r
   5 run uenvcmd