[ -z "${ROCKCHIP_LEGACY_BOOT}" ] && export ROCKCHIP_LEGACY_BOOT=$("${ROOT}/${SCRIPTS}/uboot_helper" "${PROJECT}" "${DEVICE}" "${UBOOT_SYSTEM}" rockchip_legacy_boot)

if [ "${ROCKCHIP_LEGACY_BOOT}" = "1" ]; then
  export UBOOT_TARGET="u-boot-dtb.bin"
else
  export UBOOT_TARGET=""
fi

if [ -n "${ATF_PLATFORM}" ]; then
  if [ -f "$(get_install_dir atf)/usr/share/bootloader/bl31.elf" ]; then
    export BL31="$(get_install_dir atf)/usr/share/bootloader/bl31.elf"
  fi
fi