#!/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 $kernel.strip.gz (use if present & newer, else make) # -C prefix specify command prefix for cross-building tools # (strip, objcopy, ld) # -D dir specify directory containing data files used by script # (default ./arch/powerpc/boot) # -W dir specify working directory for temporary files (default .) # defaults kernel= ofile=zImage platform=of initrd= dtb= dts= cacheit= # cross-compilation prefix CROSS= # directory for object and other files used by this script object=arch/powerpc/boot # directory for working files tmpdir=. usage() { echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2 echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2 echo ' [-D datadir] [-W workingdir] [vmlinux]' >&2 exit 1 } while [ "$#" -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="$1" ;; -?) usage ;; *) [ -z "$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.$$.o ksection=.kernel:vmlinux.strip isection=.kernel:initrd case "$platform" in pmac|pseries|chrp) platformo=$object/of.o ;; pmaccoff) platformo=$object/of.o lds=$object/zImage.coff.lds ;; miboot|uboot) # miboot and U-boot want just the bare bits, not an ELF binary ext=bin objflags="-O binary" tmp="$ofile" ksection=image isection=initrd ;; esac vmz="$tmpdir/`basename \"$kernel\"`.$ext" if [ -z "$cacheit" -o ! -f "$vmz.gz" -o "$vmz.gz" -ot "$kernel" ]; then ${CROSS}objcopy $objflags "$kernel" "$vmz.$$" gzip -f -9 "$vmz.$$" if [ -n "$cacheit" ]; then mv -f "$vmz.$$.gz" "$vmz.gz" else vmz="$vmz.$$" fi fi 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.gz" "$ofile" if [ -z "$cacheit" ]; then rm -f $vmz.gz 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.gz" $ksection $object/empty.o if [ -z "$cacheit" ]; then rm -f "$vmz.gz" fi if [ -n "$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" \ $object/crt0.o $platformo $tmp $object/wrapper.a rm $tmp fi # post-processing needed for some platforms case "$platform" in pseries|chrp) $object/addnote "$ofile" ;; pmaccoff) ${CROSS}objcopy -O aixcoff-rs6000 --set-start 0x500000 "$ofile" $object/hack-coff "$ofile" ;; esac