diff --git a/cros/build b/cros/build
new file mode 100755
index 0000000000..13f7d925c9
--- /dev/null
+++ b/cros/build
@@ -0,0 +1,82 @@
+#!/bin/sh
+
+SCRIPT="$0"
+SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
+
+OUTPUT="build/coreboot.rom"
+TMP_DIFF="$SCRIPT_DIR/.image-diff.bin"
+FLASHROM="/usr/local/sbin/flashrom"
+
+BL1_NAME="E5250.nbl1.bin"
+BL1_PATH="3rdparty/cpu/samsung/exynos5250/"
+BL1_URL="http://commondatastorage.googleapis.com/chromeos-localmirror/distfiles/exynos-pre-boot-0.0.2-r8.tbz2"
+
+die() {
+  echo "$*" >&2
+  exit 1
+}
+
+create_diff_128k() {
+  local image_file="$1"
+  local diff_file="$2"
+  cp -f "$image_file" "$diff_file"
+  dd if=/dev/zero of=$diff_file bs=1 count=$((128*1024)) conv=notrunc
+}
+
+fast_flash_image() {
+  local image_file="$1"
+  local diff_file="$2"
+  dut-control spi2_buf_en:on spi2_buf_on_flex_en:on spi2_vref:pp1800
+  sudo ${FLASHROM} -p ft2232_spi:type=servo-v2,port=a -w "$image_file" -V \
+    --noverify --ignore-fmap --diff "$diff_file"
+  dut-control spi2_buf_en:off spi2_buf_on_flex_en:off spi2_vref:off
+}
+
+get_bl1() {
+  wget "${BL1_URL}" -O /tmp/bl1.tbz2
+  tar jxvf /tmp/bl1.tbz2
+  mkdir -p "${BL1_PATH}"
+  mv "exynos-pre-boot/firmware/${BL1_NAME}" "${BL1_PATH}"
+  rm -rf exynos-pre-boot
+  if [ ! -e "${BL1_PATH}/${BL1_NAME}" ]; then
+    echo "Error getting BL1"
+    exit 1
+  fi
+}
+
+merge_bl1() {
+  local outfile="$1"
+  local bl1="${BL1_PATH}/${BL1_NAME}"
+
+  if [ ! -e "$bl1" ]; then
+    get_bl1
+  fi
+
+  # use the new BL1 which supports 30KB BL2/SPL/Coreboot
+  local size="$(stat -c "%s" "$outfile")"
+  local bl1_size="$(stat -c "%s" "$bl1")"
+
+  [ "$bl1_size" = "$((0x2000))" ] || die "Incorrect BL1 input file."
+  dd if="$bl1" of=${outfile} conv=notrunc
+}
+
+is_servod_ready() {
+  ps -C servod >/dev/null 2>&1
+}
+
+main() {
+  make
+  merge_bl1 "$OUTPUT"
+  create_diff_128k "$OUTPUT" "$TMP_DIFF"
+  echo "OK: Generated image (with BL1) in $OUTPUT"
+  if is_servod_ready; then
+    echo "servod detected - flashing into device."
+    fast_flash_image "$OUTPUT" "$TMP_DIFF"
+    echo "OK: Generated and flashed 128k of image into device via servo."
+  else
+    echo "(servod is not running, flashing into device is skipped)"
+  fi
+}
+
+set -e
+main "$@"