overlay-beaglebone/scripts/board_specific_setup.sh

#!/bin/bash

# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Creates a hybrid MBR which points the MBR partition 1 to GPT
# partition 12 (ESP).
install_hybrid_mbr() {
  info "Creating hybrid MBR"
  locate_gpt
  local start_esp=$(partoffset "$1" 12)
  local num_esp_sectors=$(partsize "$1" 12)
  sudo sfdisk -X dos "$1" <<EOF
unit: sectors

disk1 : start=   ${start_esp}, size=    ${num_esp_sectors}, Id= c, bootable
disk2 : start=   1, size=    1, Id= ee
EOF
}

# Downloads and installs the MLO and copies u-boot to the ESP.
# This is used combined with a hybrid MBR to allow booting
# a Beaglebone from microSD only.
install_beaglebone_bootloader() {
  local efi_offset_sectors=$(partoffset "$1" 12)
  local efi_size_sectors=$(partsize "$1" 12)
  local efi_offset=$(( efi_offset_sectors * 512 ))
  local efi_size=$(( efi_size_sectors * 512 ))
  local mount_opts=loop,offset=${efi_offset},sizelimit=${efi_size}
  local efi_dir=$(mktemp -d)

  sudo mount -o "${mount_opts}"  "$1" "${efi_dir}"

  sudo cp "${BOARD_ROOT}/firmware/u-boot.img" "${efi_dir}/"
  sudo cp "${BOARD_ROOT}/firmware/MLO" "${efi_dir}/"
  sudo cp "${BOARD_ROOT}/firmware/uEnv.txt" "${efi_dir}/"

  sudo umount "${efi_dir}"
  rmdir "${efi_dir}"
}

board_setup() {
  install_beaglebone_bootloader "$1"
  install_hybrid_mbr "$1"
}

skip_blacklist_check=1
skip_test_image_content=1