buildroot

image boot.vfat {

  vfat {

    files = {

      "bcm2710-rpi-3-b.dtb",

      "bcm2837-rpi-3-b.dtb",

      "rpi-firmware/bootcode.bin",

      "rpi-firmware/cmdline.txt",

      "rpi-firmware/config.txt",

      "rpi-firmware/fixup.dat",

      "rpi-firmware/start.elf",

      "Image"

    }

  }

  size = 32M

}

​

image sdcard.img {

  hdimage {

  }

​

  partition boot {

    partition-type = 0xC

    bootable = "true"

    image = "boot.vfat"

  }

​

  partition rootfs {

    partition-type = 0x83

    image = "rootfs.ext4"

  }

}