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 $kernel.strip.gz (use if present & newer, else make)
  18 # -C prefix     specify command prefix for cross-building tools
  19 #               (strip, objcopy, ld)
  20 # -D dir        specify directory containing data files used by script
  21 #               (default ./arch/powerpc/boot)
  22 # -W dir        specify working directory for temporary files (default .)
  23
  24 # Stop execution if any command fails
  25 set -e
  26
  27 # Allow for verbose output
  28 if [ "$V" = 1 ]; then
  29     set -x
  30 fi
  31
  32 # defaults
  33 kernel=
  34 ofile=zImage
  35 platform=of
  36 initrd=
  37 dtb=
  38 dts=
  39 cacheit=
  40 binary=
  41 gzip=.gz
  42
  43 # cross-compilation prefix
  44 CROSS=
  45
  46 # directory for object and other files used by this script
  47 object=arch/powerpc/boot
  48
  49 # directory for working files
  50 tmpdir=.
  51
  52 usage() {
  53     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  54     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  55     echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
  56     exit 1
  57 }
  58
  59 while [ "$#" -gt 0 ]; do
  60     case "$1" in
  61     -o)
  62         shift
  63         [ "$#" -gt 0 ] || usage
  64         ofile="$1"
  65         ;;
  66     -p)
  67         shift
  68         [ "$#" -gt 0 ] || usage
  69         platform="$1"
  70         ;;
  71     -i)
  72         shift
  73         [ "$#" -gt 0 ] || usage
  74         initrd="$1"
  75         ;;
  76     -d)
  77         shift
  78         [ "$#" -gt 0 ] || usage
  79         dtb="$1"
  80         ;;
  81     -s)
  82         shift
  83         [ "$#" -gt 0 ] || usage
  84         dts="$1"
  85         ;;
  86     -c)
  87         cacheit=y
  88         ;;
  89     -C)
  90         shift
  91         [ "$#" -gt 0 ] || usage
  92         CROSS="$1"
  93         ;;
  94     -D)
  95         shift
  96         [ "$#" -gt 0 ] || usage
  97         object="$1"
  98         ;;
  99     -W)
 100         shift
 101         [ "$#" -gt 0 ] || usage
 102         tmpdir="$1"
 103         ;;
 104     --no-gzip)
 105         gzip=
 106         ;;
 107     -?)
 108         usage
 109         ;;
 110     *)
 111         [ -z "$kernel" ] || usage
 112         kernel="$1"
 113         ;;
 114     esac
 115     shift
 116 done
 117
 118 if [ -n "$dts" ]; then
 119     if [ -z "$dtb" ]; then
 120         dtb="$platform.dtb"
 121     fi
 122     dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts"
 123 fi
 124
 125 if [ -z "$kernel" ]; then
 126     kernel=vmlinux
 127 fi
 128
 129 platformo=$object/"$platform".o
 130 lds=$object/zImage.lds
 131 ext=strip
 132 objflags=-S
 133 tmp=$tmpdir/zImage.$$.o
 134 ksection=.kernel:vmlinux.strip
 135 isection=.kernel:initrd
 136
 137 case "$platform" in
 138 pmac|pseries|chrp)
 139     platformo=$object/of.o
 140     ;;
 141 coff)
 142     platformo=$object/of.o
 143     lds=$object/zImage.coff.lds
 144     ;;
 145 miboot|uboot)
 146     # miboot and U-boot want just the bare bits, not an ELF binary
 147     ext=bin
 148     objflags="-O binary"
 149     tmp="$ofile"
 150     ksection=image
 151     isection=initrd
 152     ;;
 153 cuboot*)
 154     binary=y
 155     gzip=
 156     ;;
 157 ps3)
 158     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 159     lds=$object/zImage.ps3.lds
 160     gzip=
 161     ext=bin
 162     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 163     ksection=.kernel:vmlinux.bin
 164     isection=.kernel:initrd
 165     ;;
 166 ep88xc)
 167     platformo="$object/fixed-head.o $object/$platform.o"
 168     binary=y
 169     ;;
 170 esac
 171
 172 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 173 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 174     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 175
 176     if [ -n "$gzip" ]; then
 177         gzip -f -9 "$vmz.$$"
 178     fi
 179
 180     if [ -n "$cacheit" ]; then
 181         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 182     else
 183         vmz="$vmz.$$"
 184     fi
 185 fi
 186
 187 vmz="$vmz$gzip"
 188
 189 # Extract kernel version information, some platforms want to include
 190 # it in the image header
 191 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 192     cut -d' ' -f3`
 193 if [ -n "$version" ]; then
 194     uboot_version="-n Linux-$version"
 195 fi
 196
 197 case "$platform" in
 198 uboot)
 199     rm -f "$ofile"
 200     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 201         $uboot_version -d "$vmz" "$ofile"
 202     if [ -z "$cacheit" ]; then
 203         rm -f "$vmz"
 204     fi
 205     exit 0
 206     ;;
 207 esac
 208
 209 addsec() {
 210     ${CROSS}objcopy $4 $1 \
 211         --add-section=$3="$2" \
 212         --set-section-flags=$3=contents,alloc,load,readonly,data
 213 }
 214
 215 addsec $tmp "$vmz" $ksection $object/empty.o
 216 if [ -z "$cacheit" ]; then
 217     rm -f "$vmz"
 218 fi
 219
 220 if [ -n "$initrd" ]; then
 221     addsec $tmp "$initrd" $isection
 222 fi
 223
 224 if [ -n "$dtb" ]; then
 225     addsec $tmp "$dtb" .kernel:dtb
 226     if [ -n "$dts" ]; then
 227         rm $dtb
 228     fi
 229 fi
 230
 231 if [ "$platform" != "miboot" ]; then
 232     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 233         $platformo $tmp $object/wrapper.a
 234     rm $tmp
 235 fi
 236
 237 # Some platforms need the zImage's entry point and base address
 238 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 239 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 240
 241 if [ -n "$binary" ]; then
 242     mv "$ofile" "$ofile".elf
 243     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 244 fi
 245
 246 # post-processing needed for some platforms
 247 case "$platform" in
 248 pseries|chrp)
 249     $object/addnote "$ofile"
 250     ;;
 251 coff)
 252     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 253     $object/hack-coff "$ofile"
 254     ;;
 255 cuboot*)
 256     gzip -f -9 "$ofile"
 257     mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 258             $uboot_version -d "$ofile".gz "$ofile"
 259     ;;
 260 treeboot*)
 261     mv "$ofile" "$ofile.elf"
 262     $object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 263     if [ -z "$cacheit" ]; then
 264         rm -f "$ofile.elf"
 265     fi
 266     exit 0
 267     ;;
 268 ps3)
 269     # The ps3's loader supports loading gzipped binary images from flash
 270     # rom to addr zero. The loader enters the image at addr 0x100.  A
 271     # bootwrapper overlay is use to arrange for the kernel to be loaded
 272     # to addr zero and to have a suitable bootwrapper entry at 0x100.
 273     # To construct the rom image, 0x100 bytes from offset 0x100 in the
 274     # kernel is copied to the bootwrapper symbol __system_reset_kernel.
 275     # The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
 276     # then copied to offset 0x100.  At runtime the bootwrapper program
 277     # copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
 278
 279     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 280         | grep ' __system_reset_overlay$'       \
 281         | cut -d' ' -f1`
 282     system_reset_overlay=`printf "%d" $system_reset_overlay`
 283     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 284         | grep ' __system_reset_kernel$'       \
 285         | cut -d' ' -f1`
 286     system_reset_kernel=`printf "%d" $system_reset_kernel`
 287     overlay_dest="256"
 288     overlay_size="256"
 289
 290     rm -f "$object/otheros.bld"
 291
 292     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 293
 294     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 295         skip=$overlay_dest seek=$system_reset_kernel  \
 296         count=$overlay_size bs=1
 297
 298     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 299         skip=$system_reset_overlay seek=$overlay_dest \
 300         count=$overlay_size bs=1
 301
 302     gzip --force -9 --stdout "$ofile.bin" > "$object/otheros.bld"
 303     ;;
 304 esac