loadloadaddr=0x82000000
fdtaddr=0x88000000
kernel_file=zImage
fdtfile=am335x-boneblack.dtb
bootdir=/boot
mmcdev=1
mmcpart=2
loadzimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${bootdir}/${kernel_file} 
loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdtaddr} ${bootdir}/${fdtfile} 
console=ttyO0,115200n8
mmcroot=/dev/mmcblk0p2 rw
mmcrootfstype=ext4 rootwait 
mmcargs=setenv bootargs console=${console} root=${mmcroot} rootfstype=${mmcrootfstype} ${optargs}
uenvcmd=run loadzimage; run loadfdt; run mmcargs; bootz ${loadaddr} - ${fdtaddr}