cross/mipsel-linux-uclibc/buildroot/buildroot-2025.02.4/board/stmicroelectronics/stm32f746-disco/genimage.cfg

image sdcard.img {
	hdimage {
	}

	partition rootfs {
		partition-type = 0x83
		image = "rootfs.ext2"
		size = 32M
	}
}