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linux/arch/powerpc/boot/wrapper
Geoff Levand bafdb64577 [POWERPC] PS3: Bootwrapper support.
Add support to build the PS3 flash rom image and remove some unneeded
lmb calls.

The PS3's lv1 loader supports loading gzipped binary images from flash
rom to addr zero. The loader enters the image at addr 0x100.

In this implementation a bootwrapper overlay is use to arrange for the
kernel to be loaded to addr zero and to have a suitable bootwrapper
entry at 0x100.  To construct the rom image, 0x100 bytes from offset
0x100 in the kernel is copied to the bootwrapper symbol
__system_reset_kernel.  The 0x100 bytes at the bootwrapper symbol
__system_reset_overlay is then copied to offset 0x100.  At runtime the
bootwrapper program copies the 0x100 bytes at __system_reset_kernel to
addr 0x100.

zImage.ps3 is a wrapped image that contains a flat device tree, an lv1
compatible entry point, and an optional initrd.  otheros.bld is the gzip
compresed rom image built from zImage.ps3.  otheros.bld is suitable for
programming into the PS3 boot flash memory.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-07-10 21:56:40 +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.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd
case "$platform" in
pmac|pseries|chrp)
platformo=$object/of.o
;;
coff)
platformo=$object/of.o
lds=$object/zImage.coff.lds
;;
miboot|uboot)
# miboot and U-boot want just the bare bits, not an ELF binary
ext=bin
objflags="-O binary"
tmp="$ofile"
ksection=image
isection=initrd
;;
cuboot*)
gzip=
;;
ps3)
platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
lds=$object/zImage.ps3.lds
gzip=
ext=bin
objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
ksection=.kernel:vmlinux.bin
isection=.kernel:initrd
;;
esac
vmz="$tmpdir/`basename \"$kernel\"`.$ext"
if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
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"
;;
coff)
${CROSS}objcopy -O aixcoff-rs6000 --set-start "$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 "$ofile.elf"
fi
exit 0
;;
ps3)
# The ps3's loader supports loading gzipped binary images from flash
# rom to addr zero. The loader enters the image at addr 0x100. A
# bootwrapper overlay is use to arrange for the kernel to be loaded
# to addr zero and to have a suitable bootwrapper entry at 0x100.
# To construct the rom image, 0x100 bytes from offset 0x100 in the
# kernel is copied to the bootwrapper symbol __system_reset_kernel.
# The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
# then copied to offset 0x100. At runtime the bootwrapper program
# copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
system_reset_overlay=0x`${CROSS}nm "$ofile" \
| grep ' __system_reset_overlay$' \
| cut -d' ' -f1`
system_reset_overlay=`printf "%d" $system_reset_overlay`
system_reset_kernel=0x`${CROSS}nm "$ofile" \
| grep ' __system_reset_kernel$' \
| cut -d' ' -f1`
system_reset_kernel=`printf "%d" $system_reset_kernel`
overlay_dest="256"
overlay_size="256"
rm -f "$object/otheros.bld"
${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
msg=$(dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
skip=$overlay_dest seek=$system_reset_kernel \
count=$overlay_size bs=1 2>&1)
if [ $? -ne "0" ]; then
echo $msg
exit 1
fi
msg=$(dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
skip=$system_reset_overlay seek=$overlay_dest \
count=$overlay_size bs=1 2>&1)
if [ $? -ne "0" ]; then
echo $msg
exit 2
fi
gzip --force -9 --stdout "$ofile.bin" > "$object/otheros.bld"
;;
esac