#!/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' 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='' 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 # 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 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