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Add read mode to flash.sh

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If we want to modify a running BIOS we will need the ability to pull
down the current BIOS, modify it, and then reflash. This change adds a
read option to flash.sh and pulls down three versions of the BIOS and
only exists successfully if all three match.
This commit is contained in:
Kyle Rankin 2018-05-15 16:24:24 -07:00
parent b276e355d9
commit a9bf4eb874
No known key found for this signature in database
GPG Key ID: 555577116BFA74B9
1 changed files with 32 additions and 10 deletions
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42
initrd/bin/flash.sh
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@ -23,27 +23,49 @@ esac
flash_rom() {
ROM=$1
cp "$ROM" /tmp/${CONFIG_BOARD}.rom
sha256sum /tmp/${CONFIG_BOARD}.rom
if [ "$CLEAN" -eq 0 ]; then
preserve_rom /tmp/${CONFIG_BOARD}.rom \
|| die "$ROM: Config preservation failed"
fi
if [ "$READ" -eq 1 ]; then
flashrom $FLASHROM_OPTIONS -r "${ROM}.1" \
|| die "$ROM: Read failed"
flashrom $FLASHROM_OPTIONS -r "${ROM}.2" \
|| die "$ROM: Read failed"
flashrom $FLASHROM_OPTIONS -r "${ROM}.3" \
|| die "$ROM: Read failed"
if [ `sha256sum ${ROM}.[123] | cut -f1 -d ' ' | uniq | wc -l` -eq 1 ]; then
mv ${ROM}.1 $ROM
rm ${ROM}.[23]
else
die "$ROM: Read inconsistent"
fi
else
cp "$ROM" /tmp/${CONFIG_BOARD}.rom
sha256sum /tmp/${CONFIG_BOARD}.rom
if [ "$CLEAN" -eq 0 ]; then
preserve_rom /tmp/${CONFIG_BOARD}.rom \
|| die "$ROM: Config preservation failed"
fi
flashrom $FLASHROM_OPTIONS -w /tmp/${CONFIG_BOARD}.rom \
|| die "$ROM: Flash failed"
flashrom $FLASHROM_OPTIONS -w /tmp/${CONFIG_BOARD}.rom \
|| die "$ROM: Flash failed"
fi
}
if [ "$1" = "-c" ]; then
if [ "$1" == "-c" ]; then
CLEAN=1
READ=0
ROM="$2"
elif [ "$1" == "-r" ]; then
CLEAN=0
READ=1
ROM="$2"
touch $ROM
else
CLEAN=0
READ=0
ROM="$1"
fi
if [ ! -e "$ROM" ]; then
die "Usage: $0 [-c] <path_to_image.rom>"
die "Usage: $0 [-c|-r] <path_to_image.rom>"
fi
flash_rom $ROM