release/src-rt-6.x/linux/linux-2.6/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 $kernel.strip.gz (use if present & newer, else make)
  18 # -C prefix     specify command prefix for cross-building tools
  19 #               (strip, objcopy, ld)
  20 # -D dir        specify directory containing data files used by script
  21 #               (default ./arch/powerpc/boot)
  22 # -W dir        specify working directory for temporary files (default .)
  23
  24 # defaults
  25 kernel=
  26 ofile=zImage
  27 platform=of
  28 initrd=
  29 dtb=
  30 dts=
  31 cacheit=
  32 gzip=.gz
  33
  34 # cross-compilation prefix
  35 CROSS=
  36
  37 # directory for object and other files used by this script
  38 object=arch/powerpc/boot
  39
  40 # directory for working files
  41 tmpdir=.
  42
  43 usage() {
  44     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  45     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  46     echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
  47     exit 1
  48 }
  49
  50 while [ "$#" -gt 0 ]; do
  51     case "$1" in
  52     -o)
  53         shift
  54         [ "$#" -gt 0 ] || usage
  55         ofile="$1"
  56         ;;
  57     -p)
  58         shift
  59         [ "$#" -gt 0 ] || usage
  60         platform="$1"
  61         ;;
  62     -i)
  63         shift
  64         [ "$#" -gt 0 ] || usage
  65         initrd="$1"
  66         ;;
  67     -d)
  68         shift
  69         [ "$#" -gt 0 ] || usage
  70         dtb="$1"
  71         ;;
  72     -s)
  73         shift
  74         [ "$#" -gt 0 ] || usage
  75         dts="$1"
  76         ;;
  77     -c)
  78         cacheit=y
  79         ;;
  80     -C)
  81         shift
  82         [ "$#" -gt 0 ] || usage
  83         CROSS="$1"
  84         ;;
  85     -D)
  86         shift
  87         [ "$#" -gt 0 ] || usage
  88         object="$1"
  89         ;;
  90     -W)
  91         shift
  92         [ "$#" -gt 0 ] || usage
  93         tmpdir="$1"
  94         ;;
  95     --no-gzip)
  96         gzip=
  97         ;;
  98     -?)
  99         usage
 100         ;;
 101     *)
 102         [ -z "$kernel" ] || usage
 103         kernel="$1"
 104         ;;
 105     esac
 106     shift
 107 done
 108
 109 if [ -n "$dts" ]; then
 110     if [ -z "$dtb" ]; then
 111         dtb="$platform.dtb"
 112     fi
 113     dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts" || exit 1
 114 fi
 115
 116 if [ -z "$kernel" ]; then
 117     kernel=vmlinux
 118 fi
 119
 120 platformo=$object/"$platform".o
 121 lds=$object/zImage.lds
 122 ext=strip
 123 objflags=-S
 124 tmp=$tmpdir/zImage.$$.o
 125 ksection=.kernel:vmlinux.strip
 126 isection=.kernel:initrd
 127
 128 case "$platform" in
 129 pmac|pseries|chrp)
 130     platformo=$object/of.o
 131     ;;
 132 coff)
 133     platformo=$object/of.o
 134     lds=$object/zImage.coff.lds
 135     ;;
 136 miboot|uboot)
 137     # miboot and U-boot want just the bare bits, not an ELF binary
 138     ext=bin
 139     objflags="-O binary"
 140     tmp="$ofile"
 141     ksection=image
 142     isection=initrd
 143     ;;
 144 cuboot*)
 145     gzip=
 146     ;;
 147 esac
 148
 149 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 150 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 151     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 152
 153     if [ -n "$gzip" ]; then
 154         gzip -f -9 "$vmz.$$"
 155     fi
 156
 157     if [ -n "$cacheit" ]; then
 158         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 159     else
 160         vmz="$vmz.$$"
 161     fi
 162 fi
 163
 164 vmz="$vmz$gzip"
 165
 166 # Extract kernel version information, some platforms want to include
 167 # it in the image header
 168 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 169     cut -d' ' -f3`
 170 if [ -n "$version" ]; then
 171     uboot_version="-n Linux-$version"
 172 fi
 173
 174 case "$platform" in
 175 uboot)
 176     rm -f "$ofile"
 177     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 178         $uboot_version -d "$vmz" "$ofile"
 179     if [ -z "$cacheit" ]; then
 180         rm -f "$vmz"
 181     fi
 182     exit 0
 183     ;;
 184 esac
 185
 186 addsec() {
 187     ${CROSS}objcopy $4 $1 \
 188         --add-section=$3="$2" \
 189         --set-section-flags=$3=contents,alloc,load,readonly,data
 190 }
 191
 192 addsec $tmp "$vmz" $ksection $object/empty.o
 193 if [ -z "$cacheit" ]; then
 194     rm -f "$vmz"
 195 fi
 196
 197 if [ -n "$initrd" ]; then
 198     addsec $tmp "$initrd" $isection
 199 fi
 200
 201 if [ -n "$dtb" ]; then
 202     addsec $tmp "$dtb" .kernel:dtb
 203     if [ -n "$dts" ]; then
 204         rm $dtb
 205     fi
 206 fi
 207
 208 if [ "$platform" != "miboot" ]; then
 209     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 210         $platformo $tmp $object/wrapper.a
 211     rm $tmp
 212 fi
 213
 214 # Some platforms need the zImage's entry point and base address
 215 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 216 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 217
 218 # post-processing needed for some platforms
 219 case "$platform" in
 220 pseries|chrp)
 221     $object/addnote "$ofile"
 222     ;;
 223 coff)
 224     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 225     $object/hack-coff "$ofile"
 226     ;;
 227 cuboot*)
 228     mv "$ofile" "$ofile".elf
 229     ${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin
 230     gzip -f -9 "$ofile".bin
 231     mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 232             $uboot_version -d "$ofile".bin.gz "$ofile"
 233     ;;
 234 treeboot*)
 235     mv "$ofile" "$ofile.elf"
 236     $object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 237     if [ -z "$cacheit" ]; then
 238         rm -f "$ofile.elf"
 239     fi
 240     exit 0
 241     ;;
 242 esac