bootcmd=run boot_ubuntu
boot_ubuntu=run setup; run loadkernel; run loadinitrd; bootz ${kernel_addr_r} ${ramdisk_addr_r}:${initrdsize} 0x100
setup=fdt addr 0x100; fdt get value bootargs /chosen bootargs
loadkernel=fatload mmc 0:1 ${kernel_addr_r} vmlinuz
loadinitrd=fatload mmc 0:1 ${ramdisk_addr_r} initrd.img; setenv initrdsize $filesize
kernel_addr_r=0x01000000
ramdisk_addr_r=0x02100000