abslibre/unmaintained/uboot-am335x_bone/boot.txt

# After modifying, run ./mkscr

if test -n ${distro_bootpart}; then setenv bootpart ${distro_bootpart}; else setenv bootpart 1; fi
part uuid ${devtype} ${devnum}:${bootpart} uuid

setenv bootargs "console=tty0 console=${console} root=PARTUUID=${uuid} rw rootwait"

if load ${devtype} ${devnum}:${bootpart} ${kernel_addr_r} /boot/vmlinuz-linux-libre; then
  gpio set 54
  echo fdt: ${fdtfile}
  if load ${devtype} ${devnum}:${bootpart} ${fdt_addr_r} /boot/dtbs/linux-libre/${fdtfile}; then
    gpio set 55
    if load ${devtype} ${devnum}:${bootpart} ${ramdisk_addr_r} /boot/initramfs-linux-libre.img; then
      gpio set 56
      bootz ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r};
    else
      gpio set 56
      bootz ${kernel_addr_r} - ${fdt_addr_r};
    fi;
  fi;
fi