write_tegra_bios replaces the numerous burn-u-boot scripts.

host/write_tegra_bios

+#!/bin/bash
+
+# Copyright (c) 2011 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.
+
+#
+# This utility writes a BIOS image to a tegra based board.
+#
+
+# Include common CrOS utilities.
+. "/usr/lib/crosutils/common.sh"
+
+get_default_board
+
+# Command line options
+DEFINE_string board "$DEFAULT_BOARD" "The name of the board to flash."
+DEFINE_string variant "" "Board variant."
+DEFINE_string bios "" "Path to bios image to write."
+
+# Parse command line.
+FLAGS "$@" || exit 1
+eval set -- "${FLAGS_ARGV}"
+
+# Die on errors.
+set -e
+
+if [ -z "${FLAGS_board}" ]; then
+  error "--board required."
+  exit 1
+fi
+
+get_board_and_variant $FLAGS_board $FLAGS_variant
+
+# If the user didn't specify a BIOS image to load then build the path from
+# the chroot directory and the board/variant information provided.  This works
+# both inside and outside the chroot.
+if [ -z "${FLAGS_bios}" ]; then
+  FLAGS_bios="/build/${BOARD_VARIANT}/u-boot/u-boot.bin"
+
+  info "Using BIOS image: ${FLAGS_bios}"
+fi
+
+if [ ! -e "${FLAGS_bios}" ]; then
+  error "No BIOS image found at: ${FLAGS_bios}"
+  exit
+fi
+
+# Search for the burn-u-boot directory in our overlay list.  The first directory
+# found should be sufficient because there should only be burn-u-boot
+# directories at the board level.
+OVERLAY_LIST=$(cros_overlay_list --board "${BOARD}" --variant "${VARIANT}")
+
+for overlay in ${OVERLAY_LIST} ; do
+  if [ -d "${overlay}/burn-u-boot" ]; then
+    burn_u_boot="${overlay}/burn-u-boot"
+    break
+  fi
+done
+
+# Make sure that we have found a burn-u-boot directory and that the nvflash
+# tool has been installed.
+if [ ! -d "${burn_u_boot}" ]; then
+  error "No burn-u-boot directory found in the overlay list for this board:"
+  error "${OVERLAY_LIST}"
+fi
+
+if ! which nvflash >/dev/null ; then
+  error "The nvflash utility was not found.  Run the following command in your"
+  error "chroot: sudo -E emerge nvflash"
+  exit
+fi
+
+# bootloader.bin is a special program used to burn things into flash
+bin="${burn_u_boot}/bin/bootloader.bin"
+
+# The BCT file contains memory timings, firmware offset and length and a
+# checksum of the firmware image. The BCT file is the first data read out
+# of reset by the masked ROM.
+bct="${burn_u_boot}/bct/default.bct"
+
+# this file describes the flash layout - it pulls in the boot loader file
+cfg="${burn_u_boot}/flash.cfg"
+
+# extract the ODM data from the <overlay>/burn-u-boot/data.odm file
+odm=$(cat "${burn_u_boot}/data.odm")
+
+# try to print a helpful name - the U-Boot version string
+header=$(strings $FLAGS_bios | grep "U-Boot" | head -1 )
+info "Using: $header"
+
+# insert the correct file to flash into the nvflash configuration file.
+temp=$(mktemp)
+
+trap "rm -f ${temp}" EXIT
+
+sed "s#^filename=.*\$#filename=${FLAGS_bios}#" $cfg > $temp
+
+# Write the BCT + U-Boot + FDT Blob image to the boot device specified in the
+# flash.cfg from the burn-u-boot directory.
+sudo nvflash \
+  --bct "${bct}" \
+  --setbct \
+  --odmdata "${odm}" \
+  --configfile "${temp}" \
+  --create \
+  --bl "${bin}" \
+  --go
+
+if [ $? != 0 ]; then
+  echo
+  error "Burn failed"
+  error "Please check that your board is connected via the A-to-A USB cable"
+  error "correctly.  Also ensure that your board is in the NVIDIA force"
+  error "recovery mode.  This is accomplished by holding down the 'recovery'"
+  error "button while resetting the board (either by power cycling or pressing"
+  error "'reset'.  More information for your specific board can be found in"
+  error "the README.txt file in your boards overlay."
+else
+  info "$header written"
+  info "Press reset to start your new U-Boot"
+fi