diff options
Diffstat (limited to 'resources/scripts/download/mrc')
| -rwxr-xr-x | resources/scripts/download/mrc | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/resources/scripts/download/mrc b/resources/scripts/download/mrc new file mode 100755 index 0000000..e51da9e --- /dev/null +++ b/resources/scripts/download/mrc @@ -0,0 +1,169 @@ +#!/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 |