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|
# Copyright (C) 2006 Joey Hess <joeyh@debian.org>
# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Martin Michlmayr <tbm@cyrius.com>
# Copyright (C) 2011 Loïc Minier <lool@dooz.org>
# Copyright (C) 2011 Julian Andres Klode <jak@debian.org>
# 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; either version 2
# of the License, or (at your option) any later version.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
# USA.
BOOTSCRIPTS_DIR="${FK_CHECKOUT:-$FK_DIR}/bootscript"
MACHINE_DB="$(cat "${FK_CHECKOUT:-$FK_DIR}/db/"*.db)"
PROC_CPUINFO="/proc/cpuinfo"
PROC_MTD="/proc/mtd"
PROC_DT="/proc/device-tree/model"
error() {
echo "$@" >&2
exit 1
}
mtdblock() {
local mtdname="$1"
sed -rn "s,^mtd([^:]*).*\"$mtdname\"\$,/dev/mtdblock\\1,p" "$PROC_MTD"
}
check_block_dev() {
local dev="$1"
if [ ! -b "$dev" ]; then
error "$dev is not a block device"
fi
}
mtdsize() {
local mtdname="$1"
size=$(grep "\"$mtdname\"$" "$PROC_MTD" | cut -d " " -f 2)
printf "%d" "0x$size"
}
check_kflavors() {
local kfile_suffix="$1"
shift
if [ -z "$kfile_suffix" ]; then
return 0
fi
for kflavor; do
if [ "$kfile_suffix" = "$kflavor" ]; then
return 0
fi
done
return 1
}
check_mtd_size() {
local mtd_name="$1"
local required_size="$2"
local actual_size="$3"
if [ $required_size -gt $actual_size ]; then
error "Not enough space in MTD $mtd_name (need $required_size but is actually $actual_size)."
fi
}
check_supported() {
local machine="$1"
local field
local value
echo "$MACHINE_DB" | {
while read field value; do
if [ "$field" = "Machine:" ] &&
[ "$value" = "$machine" ]; then
return 0
fi
done
return 1
}
}
get_root_uuid() {
echo $(blkid -o value -s UUID $(mount | grep "on /${1%/} " | tail -n1 | cut -d' ' -f1))
}
get_cpuinfo_hardware() {
if [ -f "$PROC_DT" ]; then
cat "$PROC_DT"
else
grep "^Hardware" "$PROC_CPUINFO" | sed 's/Hardware\s*:\s*//'
fi
}
get_kfile_suffix() {
local kfile="$1"
local full_version=${kfile#*-}
local flavour_abi=${full_version#*-}
local flavour=${flavour_abi#*-}
echo "$flavour"
}
# this is case-sensitive and doesn't support fields spanning multiple lines
get_machine_field() {
local machine="$1"
local field_name="$2"
local state="machine"
local field
local value
echo "$MACHINE_DB" | {
while read field value; do
if [ "$state" = "machine" ] &&
[ "$field" = "Machine:" ] &&
[ "$value" = "$machine" ]; then
state="fields"
fi
if [ "$state" = "fields" ]; then
case "$field" in
"${field_name}:")
echo "$value"
return 0
;;
"")
state="machine"
;;
esac
fi
done
return 1
}
}
machine_uses_flash() {
local machine="$1"
if ! check_supported "$machine"; then
# assume devices not explicitly listed are using flash
return 0
fi
if [ -n "$(get_machine_field "$machine" "Mtd-Kernel")" ] ||
[ -n "$(get_machine_field "$machine" "Mtd-Initrd")" ]; then
return 0
fi
return 1
}
# output ARM instructions to set machine number; argument is the decimal
# machine number as found in linux/arch/arm/tools/mach-types
set_machine_id() {
local machine_id="$1"
local high
local low
if [ -z "$machine_id" ]; then
return
fi
high="$(printf "%02x" $(($machine_id / 256)))"
low="$(printf "%02x" $(($machine_id % 256)))"
devio "wl 0xe3a01c$high,4" "wl 0xe38110$low,4"
}
gen_kernel() {
local input="$1"
local output="$2"
local machine_id="$3"
{
set_machine_id "$machine_id"
cat "$input"
} >"$output"
}
gen_ubootenv() {
ENVSTUBDIRS="/etc/flash-kernel/ubootenv.d /usr/share/flash-kernel/ubootenv.d"
ENVSTUBS="$(find $ENVSTUBDIRS -type f -regex '.*/[0-9a-zA-Z_-]+' -printf '%f\n' | LC_ALL=C sort -u)"
for file in $ENVSTUBS; do
for dir in $ENVSTUBDIRS; do
if [ -f $dir/$file ]; then
cat $dir/$file
break
fi
done
done
}
append_dtb() {
local kernel="$1"
local dtb="$2"
local output="$3"
{
cat "$kernel"
cat "$dtb"
} >"$output"
}
flash_kernel() {
local input_file="$1"
local output_mtd="$2"
local machine_id="$3"
printf "Flashing kernel... " >&2
gen_kernel "$input_file" "$output_mtd" "$machine_id" || error "failed."
echo "done." >&2
}
flash_initrd() {
local input_file="$1"
local output_mtd="$2"
local pad="$3"
printf "Flashing initramfs... " >&2
{
cat "$input_file"
if [ "$pad" -gt 0 ]; then
dd if=/dev/zero bs="$pad" count=1 2>/dev/null
fi
} >"$output_mtd" || error "failed."
echo "done." >&2
}
mkimage_kernel() {
local kaddr="$1"
local kdesc="$2"
local kdata="$3"
local uimage="$4"
printf "Generating kernel u-boot image... " >&2
mkimage -A arm -O linux -T kernel -C none -a "$kaddr" -e "$kaddr" \
-n "$kdesc" -d "$kdata" "$uimage" >&2 1>/dev/null
echo "done." >&2
}
mkimage_initrd() {
local iaddr="$1"
local idesc="$2"
local idata="$3"
local uinitrd="$4"
printf "Generating initramfs u-boot image... " >&2
mkimage -A arm -O linux -T ramdisk -C gzip -a "$iaddr" -e "$iaddr" \
-n "$idesc" -d "$idata" "$uinitrd" >&2 1>/dev/null
echo "done." >&2
}
mkimage_script() {
local saddr="$1"
local sdesc="$2"
local sdata="$3"
local script="$4"
local tdata="$tmpdir/$(basename $sdata)"
local ubootenv="$(mktemp --tmpdir=$tmpdir)"
gen_ubootenv > $ubootenv
printf "Generating boot script u-boot image... " >&2
sed -e "/@@UBOOT_ENV_EXTRA@@/{
s/@@UBOOT_ENV_EXTRA@@//g
r $ubootenv
}" < $sdata > $tdata
mkimage -A arm -O linux -T script -C none -a "$saddr" -e "$saddr" \
-n "$sdesc" -d "$tdata" "$script" >&2 1>/dev/null
echo "done." >&2
}
mkimage_multi() {
local maddr="$1"
local mdesc="$2"
local kdata="$3"
local idata="$4"
local umulti="$5"
printf "Generating u-boot image..." >&2
mkimage -A arm -O linux -T multi -C none -a "$maddr" -e "$maddr" \
-n "$mdesc" -d "$kdata:$idata" "$umulti" >&2 1>/dev/null
echo "done." >&2
}
backup_and_install() {
local source="$1"
local dest="$2"
if [ -e "$dest" ]; then
echo "Taking backup of $(basename "$dest")." >&2
mv "$dest" "$dest.bak"
fi
echo "Installing new $(basename "$dest")." >&2
mv "$source" "$dest"
}
# See http://www.nslu2-linux.org/wiki/Info/BootFlash -- the NSLU2 uses a
# 16 byte MTD header, the first four bytes (big endian) give the length of
# the remainder of the image, and the remaining bytes are zero. Generate
# this header.
sercomm_header() {
perl -e 'print pack("N4", shift)' "$1"
}
nslu2_swap() {
if [ "$little_endian" ]; then
devio "<<$1" "xp $,4"
else
cat "$1"
fi
}
# XXX needs testsuite coverage
abootimg_get_image_size() {
local abootimg="$1"
echo "$abootimg" | sed -rn 's/^\* image size = ([0-9]+) bytes.*/\1/p'
}
# XXX needs testsuite coverage
android_flash() {
local device="$1"
if [ -z "$android_skip_initrd" ]; then
printf "Flashing kernel and initramfs to $device... " >&2
abootimg -u "$device" -k "$kfile" -r "$ifile" >/dev/null ||
error "failed."
echo "done." >&2
else
printf "Flashing the kernel (skipping initrd) to $device... " >&2
abootimg -u "$device" -k "$kfile" >/dev/null || error "failed."
echo "done." >&2
fi
}
include_only_flavors() {
# include_only_flavors(flav1, flav2, flav3)
# filter lines of input in uname -r format (X.Y.Z-N-flavor)
# and filter-out anything that is not in the listed input
# if exactly zero flavors are given, then assume everything is a match
local cur_uname cur_flav allowed_flav
while read cur_uname; do
if [ $# -eq 0 ]; then
echo "$cur_uname"
else
# could use cur_flav=$(get_kfile_suffix "$cur_uname")
# but this is much faster.
cur_flav=${cur_uname#*-*-}
for allowed_flav in "$@"; do
if [ "${cur_flav}" = "${allowed_flav}" ]; then
echo "$cur_uname"
break
fi
done
fi
done
}
main() {
if [ "x$1" = "x--machine" ]; then
machine="$2"
shift 2
else
machine="$(get_cpuinfo_hardware)"
fi
if [ "x$1" = "x--supported" ]; then
if check_supported "$machine"; then
exit 0
fi
exit 1
fi
# kernel + initrd installation/upgrade mode, with optional version
kvers="$1"
# if get_machine_field returns non-zero, then all flavors are allowed
kflavors="$(get_machine_field "$machine" "Kernel-Flavors")" || :
latest_version=$(linux-version list | include_only_flavors $kflavors | linux-version sort | tail -1)
if [ -n "$kvers" ] && [ "$kvers" != "$latest_version" ]; then
echo "Ignoring old or unknown version $kvers (latest is $latest_version)" >&2
exit 0
fi
kvers="$latest_version"
# accumulate multiple calls in a trigger to only run flash-kernel once; the
# trigger will just call flash-kernel again with FLASH_KERNEL_NOTRIGGER set to
# force a real run
if [ -z "$FLASH_KERNEL_NOTRIGGER" ] && [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] && dpkg-trigger --check-supported 2>/dev/null; then
# flash-kernel trigger isn't disabled, and we're called from
# some package maintainer script (e.g. some postinst calls
# flash-kernel), and dpkg-trigger is installed and confirms
# that the running dpkg support triggers: we can use the
# flash-kernel trigger (asynchronously)
if dpkg-trigger --no-await flash-kernel; then
echo "flash-kernel: deferring update (trigger activated)" >&2
exit 0
fi
# dpkg-trigger failed for some reason, proceed to a normal run
fi
kfile="/boot/vmlinuz-$kvers"
ifile="/boot/initrd.img-$kvers"
desc="kernel $kvers"
idesc="ramdisk $kvers"
if [ ! -e $kfile ] || [ ! -e $ifile ]; then
error "Can't find $kfile or $ifile"
fi
kfilesize=$(stat -c '%s' "$kfile")
ifilesize=$(stat -c '%s' "$ifile")
if [ -L "$kfile" ]; then
kfile=$(readlink -e "$kfile")
fi
kfile_suffix=$(get_kfile_suffix "$kfile")
if ! check_supported "$machine"; then
error "Unsupported platform."
fi
if [ -n "$kflavors" ]; then
if ! check_kflavors "$kfile_suffix" $kflavors; then
echo "Kernel suffix $kfile_suffix does not match any of the expected flavors ($kflavors), therefore not writing it to flash." >&2
exit 0
fi
fi
echo "flash-kernel: installing version $kvers" >&2
machine_id="$(get_machine_field "$machine" "Machine-Id")" || :
method="$(get_machine_field "$machine" "Method")" || method="generic"
mtd_kernel="$(get_machine_field "$machine" "Mtd-Kernel")" || :
mtd_initrd="$(get_machine_field "$machine" "Mtd-Initrd")" || :
dtb_name="$(get_machine_field "$machine" "DTB-Id")" || :
dtb_kver="$(get_machine_field "$machine" "DTB-Kernel-Version")" || :
ukaddr="$(get_machine_field "$machine" "U-Boot-Kernel-Address")" || :
uiaddr="$(get_machine_field "$machine" "U-Boot-Initrd-Address")" || :
umaddr="$(get_machine_field "$machine" "U-Boot-Multi-Address")" || :
usaddr="$(get_machine_field "$machine" "U-Boot-Script-Address")" || :
usname="$(get_machine_field "$machine" "U-Boot-Script-Name")" || :
boot_device="$(get_machine_field "$machine" "Boot-Device")" || :
boot_kernel_path="$(get_machine_field "$machine" "Boot-Kernel-Path")" || :
boot_initrd_path="$(get_machine_field "$machine" "Boot-Initrd-Path")" || :
boot_script_path="$(get_machine_field "$machine" "Boot-Script-Path")" || :
boot_dtb_path="$(get_machine_field "$machine" "Boot-Dtb-Path")" || :
boot_multi_path="$(get_machine_field "$machine" "Boot-Multi-Path")" || :
android_boot_device="$(get_machine_field "$machine" "Android-Boot-Device")" || :
android_skip_initrd="$(get_machine_field "$machine" "Android-Skip-Initrd")" || :
if [ -n "$mtd_kernel" ] || [ -n "$mtd_initrd" ]; then
if [ ! -e "$PROC_MTD" ]; then
error "$PROC_MTD doesn't exist"
fi
fi
if [ -n "$mtd_kernel" ]; then
kmtd=$(mtdblock "$mtd_kernel")
if [ -z "$kmtd" ]; then
error "Cannot find mtd partition '$mtd_kernel'"
fi
check_block_dev "$kmtd"
kmtdsize=$(mtdsize "$mtd_kernel")
kreqsize=$kfilesize
# setting the machine id prepends 8 bytes in front of the kernel
if [ -n "$machine_id" ]; then
kreqsize=$(($kreqsize + 8))
fi
# encapsulating in an U-Boot image grows the size by 64 bytes
if [ -n "$ukaddr" ]; then
kreqsize=$(($kreqsize + 64))
fi
check_mtd_size "$mtd_kernel" $kreqsize $kmtdsize
fi
if [ -n "$mtd_initrd" ]; then
imtd=$(mtdblock "$mtd_initrd")
if [ -z "$imtd" ]; then
error "Cannot find mtd partition '$mtd_initrd'"
fi
check_block_dev "$imtd"
imtdsize=$(mtdsize "$mtd_initrd")
ireqsize=$ifilesize
# encapsulating in an U-Boot image grows the size by 64 bytes
if [ -n "$uiaddr" ]; then
ireqsize=$(($ireqsize + 64))
fi
check_mtd_size "$mtd_initrd" $ireqsize $imtdsize
fi
tmpdir=""
boot_mnt_dir=""
cleanups() {
rm -rf "$tmpdir"
if [ -d "$boot_mnt_dir" ]; then
umount -l "$boot_mnt_dir"
rmdir "$boot_mnt_dir"
fi
}
trap cleanups EXIT HUP INT QUIT ILL KILL SEGV PIPE TERM
self="$(basename "$0")"
tmpdir="$(mktemp -dt "$self.XXXXXXXX")"
case "$method" in
"android")
if abootimg -i "$android_boot_device" > /dev/null 2>&1; then
part="$android_boot_device"
else
largest_size="-1"
for p in "$android_boot_device"*[0-9]; do
abootimg="$(LC_ALL=C abootimg -i "$p" 2>/dev/null || true)"
image_size="$(abootimg_get_image_size "$abootimg")"
if [ -n "$image_size" ] &&
[ "$image_size" -gt "$largest_size" ]; then
part="$p"
fi
done
fi
if [ -z "$part" ]; then
error "Couldn't find Android boot partition on $android_boot_device"
fi
android_flash "$part"
;;
"generic")
kernel="$kfile"
initrd="$ifile"
if [ -n "$machine_id" ]; then
gen_kernel "$kernel" "$tmpdir/kernel" "$machine_id"
kernel="$tmpdir/kernel"
fi
if [ -n "$dtb_kver" ]; then
if dpkg --compare-versions "$kvers" ge "$dtb_kver" >/dev/null; then
dtb="/lib/firmware/$kvers/device-tree/$dtb_name"
if [ ! -f "$dtb" ] ; then
error "Couldn't find $dtb"
fi
append_dtb "$kernel" "$dtb" "$tmpdir/kernel.dtb"
mv "$tmpdir/kernel.dtb" "$tmpdir/kernel"
kernel="$tmpdir/kernel"
fi
fi
if [ -n "$ukaddr" ]; then
mkimage_kernel "$ukaddr" "$desc" "$kernel" \
"$tmpdir/uImage"
kernel="$tmpdir/uImage"
rm -f "$tmpdir/kernel"
fi
if [ -n "$umaddr" ]; then
mkimage_multi "$umaddr" "$desc" "$kernel" "$initrd" \
"$tmpdir/uImage"
rm -f "$tmpdir/kernel"
fi
if [ -n "$boot_device" ]; then
check_block_dev "$boot_device"
# don't use $tmpdir/boot as to not nuke it accidentally
# if umount fails
boot_mnt_dir="$(mktemp -dt "$self.XXXXXXXX")"
mount "$boot_device" "$boot_mnt_dir"
fi
if [ -n "$boot_kernel_path" ]; then
boot_kernel_path="$boot_mnt_dir/$boot_kernel_path"
# don't mv the original kernel
if [ "$kernel" != "$kfile" ]; then
backup_and_install "$kernel" \
"$boot_kernel_path"
else
# TODO add support for kernel symlink
:
fi
elif [ -n "$kmtd" ]; then
flash_kernel "$tmpdir/uImage" "$kmtd" ""
rm -f "$tmpdir/uImage"
fi
if [ -n "$dtb_name" ] && [ -n "$boot_dtb_path" ]; then
dtb="/lib/firmware/$kvers/device-tree/$dtb_name"
if [ -f "$dtb" ]; then
cp "$dtb" "$tmpdir/$dtb_name"
dtb_path="$boot_mnt_dir/$boot_dtb_path"
backup_and_install "$tmpdir/$dtb_name" "$dtb_path"
fi
fi
if [ -n "$boot_multi_path" ]; then
backup_and_install "$tmpdir/uImage" "$boot_multi_path"
fi
if [ -n "$uiaddr" ]; then
mkimage_initrd "$uiaddr" "$idesc" "$initrd" \
"$tmpdir/uInitrd"
initrd="$tmpdir/uInitrd"
fi
if [ -n "$boot_initrd_path" ]; then
boot_initrd_path="$boot_mnt_dir/$boot_initrd_path"
# don't mv the original initrd
if [ "$initrd" != "$ifile" ]; then
backup_and_install "$initrd" \
"$boot_initrd_path"
else
# TODO add support for initrd symlink
:
fi
elif [ -n "$imtd" ]; then
ipad=0
# padding isn't needed for U-Boot images
if [ -z "$uiaddr" ]; then
ipad=$(($imtdsize - $ireqsize))
fi
flash_initrd "$initrd" "$imtd" $ipad
rm -f "$tmpdir/uInitrd"
fi
if [ -n "$boot_script_path" ]; then
case $usname in
bootscr*)
boot_script_path="$boot_mnt_dir/$boot_script_path"
boot_script="$BOOTSCRIPTS_DIR/$usname"
mkimage_script "$usaddr" "boot script" "$boot_script" \
"$tmpdir/boot.scr"
boot_script="$tmpdir/boot.scr"
backup_and_install "$boot_script" "$boot_script_path"
;;
uEnvtxt*)
VOLID=${VOLID:-"$(get_root_uuid)"}
boot_script_in="$BOOTSCRIPTS_DIR/$usname"
boot_script="$boot_mnt_dir/$usname"
cp $boot_script_in $boot_script
boot_script_path="$boot_mnt_dir/uEnv.txt"
boot_script_env="$boot_mnt_dir/preEnv.txt"
env_script="$tmpdir/preEnv.txt"
[ -e /etc/default/flash-kernel ] && . /etc/default/flash-kernel
echo "bootargs=$UBOOT_DEFAULTS root=UUID=$VOLID" > $env_script
backup_and_install "$env_script" "$boot_script_env"
backup_and_install "$boot_script" "$boot_script_path"
;;
esac
fi
;;
"symlink")
rm -f /boot/initrd /boot/zImage
ln -s "$(basename "$ifile")" /boot/initrd
gen_kernel "$kfile" "/boot/zImage" "$machine_id"
;;
"multi")
gen_kernel "$kfile" "$tmpdir/kernel" ""
# Hack to work around a bug in some U-Boot versions:
if [ $(($(stat -c '%s' "$tmpdir/kernel") % 4)) -eq 0 ]; then
echo >> "$tmpdir/kernel"
fi
mkimage_multi "$umaddr" "$desc" "$tmpdir/kernel" "$ifile" \
"$tmpdir/uImage"
rm -f "$tmpdir/kernel"
backup_and_install "$tmpdir/uImage" "$boot_multi_path"
;;
"redboot")
flash_kernel "$kfile" "$kmtd" "$machine_id"
pad=$(($imtdsize - $ifilesize))
flash_initrd "$ifile" "$imtd" $pad
;;
"slug")
case "$(dpkg --print-architecture)" in
arm|armel)
little_endian=1
;;
armeb)
little_endian=0
;;
esac
mtd_fis="FIS directory"
fismtd=$(mtdblock "$mtd_fis")
if [ -z "$fismtd" ]; then
error "Cannot find mtd partition '$mtd_fis'"
fi
check_mtd_size "$mtd_kernel" $(($kfilesize + 16 + 16)) \
$kmtdsize
check_mtd_size "$mtd_initrd" $(($ifilesize + 16)) \
$imtdsize
# The following devio magic parses the FIS directory to
# obtain the size, offset and name of each partition. This
# used used to obtain the offset of the Kernel partition.
offset=$(echo "$(devio "<<$fismtd" '
<= $ 0x20000 -
L= 0x1000
$( 1
# 0xff byte in name[0] ends the partition table
$? @ 255 =
# output size base name
<= f15+
.= b 0xfffffff &
<= f4+
.= b
pf "%lu %lu "
<= f28-
cp 16
pn
<= f240+
L= L256-
$) L255>')" |
while read a b c; do
if [ "$c" = "Kernel" ]; then
echo $b
fi
done)
# The Kernel partition, starting at $offset, is divided into
# two areas at $boundary. We therefore need to split the
# kernel into two and write them to flash with two Sercomm
# headers.
boundary=1441792 # 0x00160000
ksize1=$(($boundary - $offset - 16))
printf "Flashing kernel: " >&2
{
sercomm_header $(($kfilesize + 16))
dd if="$kfile" of="$tmpdir/kpart1" bs=$ksize1 \
count=1 2>/dev/null
nslu2_swap "$tmpdir/kpart1"
rm -f "$tmpdir/kpart1"
sercomm_header 131072
dd if="$kfile" of="$tmpdir/kpart2" ibs=$ksize1 \
skip=1 2>/dev/null
nslu2_swap "$tmpdir/kpart2"
rm -f "$tmpdir/kpart2"
} > "$kmtd" || error "failed."
echo "done." >&2
printf "Flashing initramfs: " >&2
dd if="$ifile" of="$tmpdir/initrd" ibs=$(($imtdsize - 16)) \
conv=sync 2>/dev/null
{
sercomm_header $ifilesize
nslu2_swap "$tmpdir/initrd"
rm -f "$tmpdir/initrd"
} > "$imtd" || error "failed."
echo "done." >&2
;;
esac
}
# vim:noexpandtab shiftwidth=8 syntax=sh
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