kumquat-buildroot/board/canaan/k210-soc/genimage.cfg

image boot.vfat {
	vfat {
		file uImage {
			image = "uImage"
		}

		file k210.dtb {
			image = "k210.dtb"
		}
	}
	size = 4M
}

image sdcard.img {
	hdimage {
	}

	partition boot {
		partition-type = 0xC
		image = "boot.vfat"
		bootable = "true"
		offset = 4M
	}

	partition rootfs {
		partition-type = 0x83
		image = "rootfs.ext2"
		size = 64M
	}
}