android_kernel_xiaomi_sm8350/arch/powerpc/boot/wrapper
David Gibson f6dfc80554 [POWERPC] Support for the Ebony 440GP reference board in arch/powerpc
This adds platform support code for the Ebony (440GP) evaluation
board.  This includes both code in arch/powerpc/platforms/44x for
board initialization, and zImage wrapper code to correctly tweak the
flattened device tree based on information from the firmware.  The
zImage supports both IBM OpenBIOS (aka "treeboot") and old versions of
uboot which don't support a flattened device tree.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-08 14:47:32 +10:00

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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.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd
case "$platform" in
pmac|pseries|chrp)
platformo=$object/of.o
;;
pmaccoff)
platformo=$object/of.o
lds=$object/zImage.coff.lds
;;
miboot|uboot)
# miboot and U-boot want just the bare bits, not an ELF binary
ext=bin
objflags="-O binary"
tmp="$ofile"
ksection=image
isection=initrd
;;
cuboot*)
gzip=
;;
esac
vmz="$tmpdir/`basename \"$kernel\"`.$ext"
if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
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"
# Extract kernel version information, some platforms want to include
# it in the image header
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
cut -d' ' -f3`
if [ -n "$version" ]; then
uboot_version="-n Linux-$version"
fi
case "$platform" in
uboot)
rm -f "$ofile"
mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
$uboot_version -d "$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 $tmp
fi
# Some platforms need the zImage's entry point and base address
base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
# post-processing needed for some platforms
case "$platform" in
pseries|chrp)
$object/addnote "$ofile"
;;
pmaccoff)
${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
$object/hack-coff "$ofile"
;;
cuboot*)
mv "$ofile" "$ofile".elf
${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin
gzip -f -9 "$ofile".bin
mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
$uboot_version -d "$ofile".bin.gz "$ofile"
;;
treeboot*)
mv "$ofile" "$ofile.elf"
$object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
if [ -z "$cacheit" ]; then
rm -f "$ofile.elf"
fi
exit 0
;;
esac