linux-arkmicro/buildroot-2021.02.2/board/orangepi/orangepi-r1/genimage.cfg

# Minimal SD card image for the OrangePi R1
#
image boot.vfat {
	vfat {
		files = {
			"zImage",
			"sun8i-h2-plus-orangepi-r1.dtb",
			"boot.scr"
		}
	}
	size = 10M
}

image sdcard.img {
	hdimage {
		# for root=PARTLABEL support
		gpt = true
		# default GPT location conflicts with spl, move it after
		gpt-location = 1M
	}

	partition u-boot {
		in-partition-table = "no"
		image = "u-boot-sunxi-with-spl.bin"
		offset = 8192
		size = 1056768 # 1MB - 8192 + 16384 (GPT)
	}

	partition boot {
		partition-type = 0xC
		bootable = "true"
		image = "boot.vfat"
	}

	# 'rootfs' will be used as the partition label, used
	# with root=PARTLABEL=rootfs kernel command line
	partition rootfs {
		partition-type = 0x83
		image = "rootfs.ext4"
		size = 512M
	}
}