android_kernel_motorola_sm6225/arch/powerpc/boot/wrapper
Scott Wood a9903811bf [POWERPC] bootwrapper: Make compression of the kernel image optional.
The --no-gzip option can be passed to the wrapper so that the kernel
image is included uncompressed into the zImage.  This is intended for
bootloaders where the zImage itself can be compressed, or where boot time
is considered more important than kernel image size.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-03-21 22:35:21 +11:00

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#!/bin/sh
# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
# This program may be used under the terms of version 2 of the GNU
# General Public License.
# This script takes a kernel binary and optionally an initrd image
# and/or a device-tree blob, and creates a bootable zImage for a
# given platform.
# Options:
# -o zImage specify output file
# -p platform specify platform (links in $platform.o)
# -i initrd specify initrd file
# -d devtree specify device-tree blob
# -s tree.dts specify device-tree source file (needs dtc installed)
# -c cache $kernel.strip.gz (use if present & newer, else make)
# -C prefix specify command prefix for cross-building tools
# (strip, objcopy, ld)
# -D dir specify directory containing data files used by script
# (default ./arch/powerpc/boot)
# -W dir specify working directory for temporary files (default .)
# defaults
kernel=
ofile=zImage
platform=of
initrd=
dtb=
dts=
cacheit=
gzip=.gz
# cross-compilation prefix
CROSS=
# directory for object and other files used by this script
object=arch/powerpc/boot
# directory for working files
tmpdir=.
usage() {
echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
exit 1
}
while [ "$#" -gt 0 ]; do
case "$1" in
-o)
shift
[ "$#" -gt 0 ] || usage
ofile="$1"
;;
-p)
shift
[ "$#" -gt 0 ] || usage
platform="$1"
;;
-i)
shift
[ "$#" -gt 0 ] || usage
initrd="$1"
;;
-d)
shift
[ "$#" -gt 0 ] || usage
dtb="$1"
;;
-s)
shift
[ "$#" -gt 0 ] || usage
dts="$1"
;;
-c)
cacheit=y
;;
-C)
shift
[ "$#" -gt 0 ] || usage
CROSS="$1"
;;
-D)
shift
[ "$#" -gt 0 ] || usage
object="$1"
;;
-W)
shift
[ "$#" -gt 0 ] || usage
tmpdir="$1"
;;
--no-gzip)
gzip=
;;
-?)
usage
;;
*)
[ -z "$kernel" ] || usage
kernel="$1"
;;
esac
shift
done
if [ -n "$dts" ]; then
if [ -z "$dtb" ]; then
dtb="$platform.dtb"
fi
dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts" || exit 1
fi
if [ -z "$kernel" ]; then
kernel=vmlinux
fi
platformo=$object/"$platform".o
lds=$object/zImage.lds
ext=strip
objflags=-S
tmp=$tmpdir/zImage.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd
case "$platform" in
pmac|pseries|chrp)
platformo=$object/of.o
;;
pmaccoff)
platformo=$object/of.o
lds=$object/zImage.coff.lds
;;
miboot|uboot)
# miboot and U-boot want just the bare bits, not an ELF binary
ext=bin
objflags="-O binary"
tmp="$ofile"
ksection=image
isection=initrd
;;
esac
vmz="$tmpdir/`basename \"$kernel\"`.$ext"
if [ -z "$cacheit" -o ! -f "$vmz.gz" -o "$vmz.gz" -ot "$kernel" ]; then
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
if [ -n "$gzip" ]; then
gzip -f -9 "$vmz.$$"
fi
if [ -n "$cacheit" ]; then
mv -f "$vmz.$$$gzip" "$vmz$gzip"
else
vmz="$vmz.$$"
fi
fi
vmz="$vmz$gzip"
case "$platform" in
uboot)
rm -f "$ofile"
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
cut -d' ' -f3`
if [ -n "$version" ]; then
version="-n Linux-$version"
fi
mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
$version -d "$vmz" "$ofile"
if [ -z "$cacheit" ]; then
rm -f "$vmz"
fi
exit 0
;;
esac
addsec() {
${CROSS}objcopy $4 $1 \
--add-section=$3="$2" \
--set-section-flags=$3=contents,alloc,load,readonly,data
}
addsec $tmp "$vmz" $ksection $object/empty.o
if [ -z "$cacheit" ]; then
rm -f "$vmz"
fi
if [ -n "$initrd" ]; then
addsec $tmp "$initrd" $isection
fi
if [ -n "$dtb" ]; then
addsec $tmp "$dtb" .kernel:dtb
if [ -n "$dts" ]; then
rm $dtb
fi
fi
if [ "$platform" != "miboot" ]; then
${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
$platformo $tmp $object/wrapper.a
rm $tmp
fi
# post-processing needed for some platforms
case "$platform" in
pseries|chrp)
$object/addnote "$ofile"
;;
pmaccoff)
entry=`objdump -f "$ofile" | grep '^start address ' | \
cut -d' ' -f3`
${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
$object/hack-coff "$ofile"
;;
esac