@@ -212,10 +212,13 @@ CROSSWRAP := -C "$(CROSS_COMPILE)"
endif
endif
+compressor-$(CONFIG_KERNEL_GZIP) := gz
+
# args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
quiet_cmd_wrap = WRAP $@
- cmd_wrap =$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
- $(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) vmlinux
+ cmd_wrap =$(CONFIG_SHELL) $(wrapper) -Z $(compressor-y) -c -o $@ -p $2 \
+ $(CROSSWRAP) $(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) \
+ vmlinux
image-$(CONFIG_PPC_PSERIES) += zImage.pseries
image-$(CONFIG_PPC_POWERNV) += zImage.pseries
@@ -20,6 +20,8 @@
# -D dir specify directory containing data files used by script
# (default ./arch/powerpc/boot)
# -W dir specify working directory for temporary files (default .)
+# -z use gzip (legacy)
+# -Z zsuffix compression to use (gz, xz or none)
# Stop execution if any command fails
set -e
@@ -38,7 +40,7 @@ dtb=
dts=
cacheit=
binary=
-gzip=.gz
+compression=.gz
pie=
format=
@@ -59,7 +61,8 @@ tmpdir=.
usage() {
echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
- echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
+ echo ' [-D datadir] [-W workingdir] [-Z (gz|xz|none)]' >&2
+ echo ' [--no-compression] [vmlinux]' >&2
exit 1
}
@@ -126,8 +129,24 @@ while [ "$#" -gt 0 ]; do
[ "$#" -gt 0 ] || usage
tmpdir="$1"
;;
+ -z)
+ compression=.gz
+ ;;
+ -Z)
+ shift
+ [ "$#" -gt 0 ] || usage
+ [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "none" ] || usage
+
+ compression=".$1"
+
+ if [ $compression = ".none" ]; then
+ compression=
+ fi
+ ;;
--no-gzip)
- gzip=
+ # a "feature" of the the wrapper script is that it can be used outside
+ # the kernel tree. So keeping this around for backwards compatibility.
+ compression=
;;
-?)
usage
@@ -140,6 +159,7 @@ while [ "$#" -gt 0 ]; do
shift
done
+
if [ -n "$dts" ]; then
if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
dts="$object/dts/$dts"
@@ -212,7 +232,7 @@ miboot|uboot*)
;;
cuboot*)
binary=y
- gzip=
+ compression=
case "$platform" in
*-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
platformo=$object/cuboot-8xx.o
@@ -243,7 +263,7 @@ cuboot*)
ps3)
platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
lds=$object/zImage.ps3.lds
- gzip=
+ compression=
ext=bin
objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
ksection=.kernel:vmlinux.bin
@@ -310,27 +330,37 @@ mvme7100)
esac
vmz="$tmpdir/`basename \"$kernel\"`.$ext"
-if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
- ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
- strip_size=$(stat -c %s $vmz.$$)
+# Calculate the vmlinux.strip size
+${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
+strip_size=$(stat -c %s $vmz.$$)
- if [ -n "$gzip" ]; then
+if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
+ # recompress the image if we need to
+ case $compression in
+ .xz)
+ xz --check=crc32 -f -9 "$vmz.$$"
+ ;;
+ .gz)
gzip -n -f -9 "$vmz.$$"
- fi
+ ;;
+ *)
+ # drop the compression suffix so the stripped vmlinux is used
+ compression=
+ ;;
+ esac
if [ -n "$cacheit" ]; then
- mv -f "$vmz.$$$gzip" "$vmz$gzip"
+ mv -f "$vmz.$$$compression" "$vmz$compression"
else
vmz="$vmz.$$"
fi
else
- # Calculate the vmlinux.strip size
- ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
- strip_size=$(stat -c %s $vmz.$$)
rm -f $vmz.$$
fi
+vmz="$vmz$compression"
+
if [ "$make_space" = "y" ]; then
# Round the size to next higher MB limit
round_size=$(((strip_size + 0xfffff) & 0xfff00000))
@@ -346,8 +376,6 @@ if [ "$make_space" = "y" ]; then
fi
fi
-vmz="$vmz$gzip"
-
# Extract kernel version information, some platforms want to include
# it in the image header
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
@@ -417,6 +445,7 @@ if [ "$platform" != "miboot" ]; then
if [ -n "$link_address" ] ; then
text_start="-Ttext $link_address"
fi
+#link everything
${CROSS}ld -m $format -T $lds $text_start $pie -o "$ofile" \
$platformo $tmp $object/wrapper.a
rm $tmp
This modifies the script so that the -Z option takes an argument to specify the compression type. It can either be 'gz', 'xz' or 'none'. The legazy --no-gzip and -z options are still supported and will set the compression to none and gzip respectively, but they are not documented. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> --- arch/powerpc/boot/Makefile | 7 ++++-- arch/powerpc/boot/wrapper | 61 ++++++++++++++++++++++++++++++++++------------ 2 files changed, 50 insertions(+), 18 deletions(-)