arch/powerpc/boot/wrapper

   1 #!/bin/sh
   2
   3 # Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
   4 # This program may be used under the terms of version 2 of the GNU
   5 # General Public License.
   6
   7 # This script takes a kernel binary and optionally an initrd image
   8 # and/or a device-tree blob, and creates a bootable zImage for a
   9 # given platform.
  10
  11 # Options:
  12 # -o zImage     specify output file
  13 # -p platform   specify platform (links in $platform.o)
  14 # -i initrd     specify initrd file
  15 # -d devtree    specify device-tree blob
  16 # -s tree.dts   specify device-tree source file (needs dtc installed)
  17 # -c            cache $kernel.strip.gz (use if present & newer, else make)
  18 # -C prefix     specify command prefix for cross-building tools
  19 #               (strip, objcopy, ld)
  20 # -D dir        specify directory containing data files used by script
  21 #               (default ./arch/powerpc/boot)
  22 # -W dir        specify working directory for temporary files (default .)
  23
  24 # defaults
  25 kernel=
  26 ofile=zImage
  27 platform=of
  28 initrd=
  29 dtb=
  30 dts=
  31 cacheit=
  32
  33 # cross-compilation prefix
  34 CROSS=
  35
  36 # directory for object and other files used by this script
  37 object=arch/powerpc/boot
  38
  39 # directory for working files
  40 tmpdir=.
  41
  42 usage() {
  43     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  44     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  45     echo '       [-D datadir] [-W workingdir] [vmlinux]' >&2
  46     exit 1
  47 }
  48
  49 while [ "$#" -gt 0 ]; do
  50     case "$1" in
  51     -o)
  52         shift
  53         [ "$#" -gt 0 ] || usage
  54         ofile="$1"
  55         ;;
  56     -p)
  57         shift
  58         [ "$#" -gt 0 ] || usage
  59         platform="$1"
  60         ;;
  61     -i)
  62         shift
  63         [ "$#" -gt 0 ] || usage
  64         initrd="$1"
  65         ;;
  66     -d)
  67         shift
  68         [ "$#" -gt 0 ] || usage
  69         dtb="$1"
  70         ;;
  71     -s)
  72         shift
  73         [ "$#" -gt 0 ] || usage
  74         dts="$1"
  75         ;;
  76     -c)
  77         cacheit=y
  78         ;;
  79     -C)
  80         shift
  81         [ "$#" -gt 0 ] || usage
  82         CROSS="$1"
  83         ;;
  84     -D)
  85         shift
  86         [ "$#" -gt 0 ] || usage
  87         object="$1"
  88         ;;
  89     -W)
  90         shift
  91         [ "$#" -gt 0 ] || usage
  92         tmpdir="$1"
  93         ;;
  94     -?)
  95         usage
  96         ;;
  97     *)
  98         [ -z "$kernel" ] || usage
  99         kernel="$1"
 100         ;;
 101     esac
 102     shift
 103 done
 104
 105 if [ -n "$dts" ]; then
 106     if [ -z "$dtb" ]; then
 107         dtb="$platform.dtb"
 108     fi
 109     dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts" || exit 1
 110 fi
 111
 112 if [ -z "$kernel" ]; then
 113     kernel=vmlinux
 114 fi
 115
 116 platformo=$object/"$platform".o
 117 lds=$object/zImage.lds
 118 ext=strip
 119 objflags=-S
 120 tmp=$tmpdir/zImage.$$.o
 121 ksection=.kernel:vmlinux.strip
 122 isection=.kernel:initrd
 123
 124 case "$platform" in
 125 pmac|pseries|chrp)
 126     platformo=$object/of.o
 127     ;;
 128 pmaccoff)
 129     platformo=$object/of.o
 130     lds=$object/zImage.coff.lds
 131     ;;
 132 miboot|uboot)
 133     # miboot and U-boot want just the bare bits, not an ELF binary
 134     ext=bin
 135     objflags="-O binary"
 136     tmp="$ofile"
 137     ksection=image
 138     isection=initrd
 139     ;;
 140 esac
 141
 142 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 143 if [ -z "$cacheit" -o ! -f "$vmz.gz" -o "$vmz.gz" -ot "$kernel" ]; then
 144     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 145     gzip -f -9 "$vmz.$$"
 146     if [ -n "$cacheit" ]; then
 147         mv -f "$vmz.$$.gz" "$vmz.gz"
 148     else
 149         vmz="$vmz.$$"
 150     fi
 151 fi
 152
 153 case "$platform" in
 154 uboot)
 155     rm -f "$ofile"
 156     version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 157         cut -d' ' -f3`
 158     if [ -n "$version" ]; then
 159         version="-n Linux-$version"
 160     fi
 161     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 162         $version -d "$vmz.gz" "$ofile"
 163     if [ -z "$cacheit" ]; then
 164         rm -f $vmz.gz
 165     fi
 166     exit 0
 167     ;;
 168 esac
 169
 170 addsec() {
 171     ${CROSS}objcopy $4 $1 \
 172         --add-section=$3="$2" \
 173         --set-section-flags=$3=contents,alloc,load,readonly,data
 174 }
 175
 176 addsec $tmp "$vmz.gz" $ksection $object/empty.o
 177 if [ -z "$cacheit" ]; then
 178     rm -f "$vmz.gz"
 179 fi
 180
 181 if [ -n "$initrd" ]; then
 182     addsec $tmp "$initrd" $isection
 183 fi
 184
 185 if [ -n "$dtb" ]; then
 186     addsec $tmp "$dtb" .kernel:dtb
 187 fi
 188
 189 if [ "$platform" != "miboot" ]; then
 190     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 191         $object/crt0.o $platformo $tmp $object/wrapper.a
 192     rm $tmp
 193 fi
 194
 195 # post-processing needed for some platforms
 196 case "$platform" in
 197 pseries|chrp)
 198     $object/addnote "$ofile"
 199     ;;
 200 pmaccoff)
 201     ${CROSS}objcopy -O aixcoff-rs6000 --set-start 0x500000 "$ofile"
 202     $object/hack-coff "$ofile"
 203     ;;
 204 esac