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|
#!/bin/bash
# Download Intel MRC images
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# This script assumes that the working directory is the
# root of osboot_src or osboot git.
# This file is forked from util/chromeos/crosfirmware.sh in coreboot cfc26ce278
# Changes to it in osboot are copyright 2021 Leah Rowe
[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e
# On some systems, `parted` and `debugfs` are located in /sbin.
export PATH="${PATH}:/sbin"
download_image()
{
_url=${1}
_file=${2}
_sha1sum=${3}
echo "Downloading recovery image"
curl "$_url" > "$_file.zip"
if [ "$(sha1sum ${_file}.zip)" = "${_sha1sum} ${_file}.zip" ]; then
unzip -q "${_file}.zip"
rm "${_file}.zip"
echo "Checksum verification passed for recovery image."
return 0
else
rm "${_file}.zip"
echo "Bad checksum. Recovery image deleted."
return 1
fi
}
extract_partition()
{
NAME=${1}
FILE=${2}
ROOTFS=${3}
_bs=1024
echo "Extracting ROOT-A partition"
ROOTP=$( printf "unit\nB\nprint\nquit\n" | \
parted ${FILE} 2>/dev/null | grep ${NAME} )
START=$(( $( echo ${ROOTP} | cut -f2 -d\ | tr -d "B" ) ))
SIZE=$(( $( echo ${ROOTP} | cut -f4 -d\ | tr -d "B" ) ))
dd if=${FILE} of=${ROOTFS} bs=${_bs} skip=$(( ${START} / ${_bs} )) \
count=$(( ${SIZE} / ${_bs} )) > /dev/null
}
extract_shellball()
{
ROOTFS=${1}
SHELLBALL=${2}
echo "Extracting chromeos-firmwareupdate"
printf "cd /usr/sbin\ndump chromeos-firmwareupdate ${SHELLBALL}\nquit" | \
debugfs ${ROOTFS} > /dev/null 2>&1
}
extract_coreboot()
{
_shellball=${1}
_unpacked=$( mktemp -d )
echo "Extracting coreboot image"
sh ${_shellball} --unpack ${_unpacked} > /dev/null
_version=$( cat ${_unpacked}/VERSION | grep BIOS\ version: | \
cut -f2 -d: | tr -d \ )
cp ${_unpacked}/bios.bin coreboot-${_version}.bin
rm -r "${_unpacked}"
}
check_existing()
{
_mrc_complete_hash="d18de1e3d52c0815b82ea406ca07897c56c65696"
if [ -f mrc/haswell/mrc.bin ]; then
printf 'found existing mrc.bin, checking its hash\n'
if [ "$(sha1sum mrc/haswell/mrc.bin)" = "${_mrc_complete_hash} mrc/haswell/mrc.bin" ]; then
printf 'checksums matched, skipping redownloading image\n'
return 0
else
printf 'hashes did not match, starting over\n'
return 1
fi
else
return 1
fi
}
# Skips redownloading every time the script runs
check_existing && exit 0
if [ ! -d "coreboot/default/" ]; then
./download coreboot default
fi
if [ ! -f "coreboot/default/util/cbfstool/cbfstool" ]; then
./build module cbutils default
fi
# Remove the old version that may still exist
# ------------------------------------------------------------------------------
printf "Downloading Intel MRC blobs\n"
#rm -Rf "mrc/"
mkdir -p mrc/haswell/
(
cd mrc/haswell/
# https://web.archive.org/web/20210211071412/https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf
# peppy image used as defined here, mrc.bin extracted from that.
# when wanting to use an updated version later on, just change the url and
# sha1sums and such, in this script, based on a newer version on archive.org.
# For haswell mrc.bin, used on ThinkPad T440p and W541
_board="peppy"
_file="chromeos_12239.92.0_peppy_recovery_stable-channel_mp-v3.bin"
_url="https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_12239.92.0_peppy_recovery_stable-channel_mp-v3.bin.zip"
_url2="https://web.archive.org/web/20200516070928/https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_12239.92.0_peppy_recovery_stable-channel_mp-v3.bin.zip"
_sha1sum="cd5917cbe7f821ad769bf0fd87046898f9e175c8"
download_image ${_url} ${_file} ${_sha1sum}
if [ ! -f ${_file} ]; then
download_image ${_url2} ${_file} ${_sha1sum}
fi
if [ ! -f $_file ]; then
echo "${_file} was not downloaded, or verification failed. Exiting"
exit 1
fi
extract_partition ROOT-A ${_file} root-a.ext2
extract_shellball root-a.ext2 chromeos-firmwareupdate-${_board}
extract_coreboot chromeos-firmwareupdate-${_board}
../../coreboot/default/util/cbfstool/cbfstool coreboot-*.bin extract -f mrc.bin -n mrc.bin -r RO_SECTION
rm -f "chromeos-firmwareupdate-${_board}" coreboot-*.bin "${_file}" "root-a.ext2"
printf "\n\nHaswell mrc.bin file (for T440p and W541) downloaded to mrc/haswell/mrc.bin\n\n"
)
exit 0
|
