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linux/arch/powerpc/boot/wrapper

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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 $kernel.strip.gz (use if present & newer, else make)
# -C prefix specify command prefix for cross-building tools
# (strip, objcopy, ld)
# -D dir specify directory containing data files used by script
# (default ./arch/powerpc/boot)
# -W dir specify working directory for temporary files (default .)
# Stop execution if any command fails
set -e
# Allow for verbose output
if [ "$V" = 1 ]; then
set -x
fi
# defaults
kernel=
ofile=zImage
platform=of
initrd=
dtb=
dts=
cacheit=
binary=
gzip=.gz
pie=
# cross-compilation prefix
CROSS=
# mkimage wrapper script
MKIMAGE=$srctree/scripts/mkuboot.sh
# directory for object and other files used by this script
object=arch/powerpc/boot
objbin=$object
dtc=scripts/dtc/dtc
# 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"
objbin="$1"
;;
-W)
shift
[ "$#" -gt 0 ] || usage
tmpdir="$1"
;;
--no-gzip)
gzip=
;;
-?)
usage
;;
*)
[ -z "$kernel" ] || usage
kernel="$1"
;;
esac
shift
done
if [ -n "$dts" ]; then
if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
dts="$object/dts/$dts"
fi
if [ -z "$dtb" ]; then
dtb="$platform.dtb"
fi
$dtc -O dtb -o "$dtb" -b 0 "$dts"
fi
if [ -z "$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
link_address='0x400000'
make_space=y
case "$platform" in
pseries)
platformo=$object/of.o
link_address='0x4000000'
;;
maple)
platformo=$object/of.o
link_address='0x400000'
;;
pmac|chrp)
platformo=$object/of.o
;;
coff)
platformo="$object/crt0.o $object/of.o"
lds=$object/zImage.coff.lds
link_address='0x500000'
pie=
;;
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*)
binary=y
gzip=
case "$platform" in
*-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
platformo=$object/cuboot-8xx.o
;;
*5200*|*-motionpro)
platformo=$object/cuboot-52xx.o
;;
*-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
platformo=$object/cuboot-pq2.o
;;
*-mpc824*)
platformo=$object/cuboot-824x.o
;;
*-mpc83*|*-asp834x*)
platformo=$object/cuboot-83xx.o
;;
*-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
platformo=$object/cuboot-85xx-cpm2.o
;;
*-mpc85*|*-tqm85*|*-sbc85*)
platformo=$object/cuboot-85xx.o
;;
*-amigaone)
link_address='0x800000'
;;
esac
;;
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
link_address=''
make_space=n
pie=
;;
ep88xc|ep405|ep8248e)
platformo="$object/fixed-head.o $object/$platform.o"
binary=y
;;
adder875-redboot)
platformo="$object/fixed-head.o $object/redboot-8xx.o"
binary=y
;;
simpleboot-virtex405-*)
platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
binary=y
;;
simpleboot-virtex440-*)
platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
binary=y
;;
simpleboot-*)
platformo="$object/fixed-head.o $object/simpleboot.o"
binary=y
;;
asp834x-redboot)
platformo="$object/fixed-head.o $object/redboot-83xx.o"
binary=y
;;
xpedite52*)
link_address='0x1400000'
platformo=$object/cuboot-85xx.o
;;
gamecube|wii)
link_address='0x600000'
platformo="$object/$platform-head.o $object/$platform.o"
;;
treeboot-currituck)
link_address='0x1000000'
;;
treeboot-iss4xx-mpic)
platformo="$object/treeboot-iss4xx.o"
;;
epapr)
link_address='0x20000000'
pie=-pie
;;
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.$$)
if [ -n "$gzip" ]; then
gzip -n -f -9 "$vmz.$$"
fi
if [ -n "$cacheit" ]; then
mv -f "$vmz.$$$gzip" "$vmz$gzip"
else
vmz="$vmz.$$"
fi
else
# Calculate the vmlinux.strip size
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
strip_size=$(stat -c %s $vmz.$$)
rm -f $vmz.$$
fi
if [ "$make_space" = "y" ]; then
# Round the size to next higher MB limit
round_size=$(((strip_size + 0xfffff) & 0xfff00000))
round_size=0x$(printf "%x" $round_size)
link_addr=$(printf "%d" $link_address)
if [ $link_addr -lt $strip_size ]; then
echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
"overlaps the address of the wrapper($link_address)"
echo "INFO: Fixing the link_address of wrapper to ($round_size)"
link_address=$round_size
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
# physical offset of kernel image
membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
case "$platform" in
uboot)
rm -f "$ofile"
${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
$uboot_version -d "$vmz" "$ofile"
if [ -z "$cacheit" ]; then
rm -f "$vmz"
fi
exit 0
;;
uboot-obs600)
rm -f "$ofile"
# obs600 wants a multi image with an initrd, so we need to put a fake
# one in even when building a "normal" image.
if [ -n "$initrd" ]; then
real_rd="$initrd"
else
real_rd=`mktemp`
echo "\0" >>"$real_rd"
fi
${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
if [ -z "$initrd" ]; then
rm -f "$real_rd"
fi
if [ -z "$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
if [ -n "$link_address" ] ; then
text_start="-Ttext $link_address"
fi
${CROSS}ld -m elf32ppc -T $lds $text_start $pie -o "$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`
if [ -n "$binary" ]; then
mv "$ofile" "$ofile".elf
${CROSS}objcopy -O binary "$ofile".elf "$ofile"
fi
# post-processing needed for some platforms
case "$platform" in
pseries|chrp|maple)
$objbin/addnote "$ofile"
;;
coff)
${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
$objbin/hack-coff "$ofile"
;;
cuboot*)
gzip -n -f -9 "$ofile"
${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
$uboot_version -d "$ofile".gz "$ofile"
;;
treeboot*)
mv "$ofile" "$ofile.elf"
$objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
if [ -z "$cacheit" ]; then
rm -f "$ofile.elf"
fi
exit 0
;;
ps3)
# The ps3's loader supports loading a gzipped binary image from flash
# rom to ram addr zero. The loader then enters the system reset
# vector at addr 0x100. A bootwrapper overlay is used to arrange for
# a binary image of the kernel to be at addr zero, and yet have a
# suitable bootwrapper entry at 0x100. To construct the final rom
# image 512 bytes from offset 0x100 is copied to the bootwrapper
# place holder at symbol __system_reset_kernel. The 512 bytes of the
# bootwrapper entry code at symbol __system_reset_overlay is then
# copied to offset 0x100. At runtime the bootwrapper program copies
# the data at __system_reset_kernel back to addr 0x100.
system_reset_overlay=0x`${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="512"
${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
skip=$overlay_dest seek=$system_reset_kernel \
count=$overlay_size bs=1
dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
skip=$system_reset_overlay seek=$overlay_dest \
count=$overlay_size bs=1
odir="$(dirname "$ofile.bin")"
rm -f "$odir/otheros.bld"
gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
;;
esac
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