u-boot/doc/uImage.FIT/uefi.its

/*
 * Example FIT image description file demonstrating the usage of the
 * bootm command to launch UEFI binaries.
 *
 * Two boot configurations are available to enable booting GRUB2 on QEMU,
 * the former uses a FDT blob contained in the FIT image, while the later
 * relies on the FDT provided by the board emulator.
 */

/dts-v1/;

/ {
	description = "GRUB2 EFI and QEMU FDT blob";
	#address-cells = <1>;

	images {
		efi-grub {
			description = "GRUB EFI Firmware";
			data = /incbin/("bootarm.efi");
			type = "kernel_noload";
			arch = "arm";
			os = "efi";
			compression = "none";
			load = <0x0>;
			entry = <0x0>;
			hash-1 {
				algo = "sha256";
			};
		};

		fdt-qemu {
			description = "QEMU DTB";
			data = /incbin/("qemu-arm.dtb");
			type = "flat_dt";
			arch = "arm";
			compression = "none";
			hash-1 {
				algo = "sha256";
			};
		};
	};

	configurations {
		default = "config-grub-fdt";

		config-grub-fdt {
			description = "GRUB EFI Boot w/ FDT";
			kernel = "efi-grub";
			fdt = "fdt-qemu";
			signature-1 {
				algo = "sha256,rsa2048";
				key-name-hint = "dev";
				sign-images = "kernel", "fdt";
			};
		};

		config-grub-nofdt {
			description = "GRUB EFI Boot w/o FDT";
			kernel = "efi-grub";
			signature-1 {
				algo = "sha256,rsa2048";
				key-name-hint = "dev";
				sign-images = "kernel";
			};
		};
	};
};