release/src-rt-6.x.4708/linux/linux-2.6.36/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 # mkimage wrapper script
  47 MKIMAGE=$srctree/scripts/mkuboot.sh
  48
  49 # directory for object and other files used by this script
  50 object=arch/powerpc/boot
  51 objbin=$object
  52 dtc=scripts/dtc/dtc
  53
  54 # directory for working files
  55 tmpdir=.
  56
  57 usage() {
  58     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  59     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  60     echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
  61     exit 1
  62 }
  63
  64 while [ "$#" -gt 0 ]; do
  65     case "$1" in
  66     -o)
  67         shift
  68         [ "$#" -gt 0 ] || usage
  69         ofile="$1"
  70         ;;
  71     -p)
  72         shift
  73         [ "$#" -gt 0 ] || usage
  74         platform="$1"
  75         ;;
  76     -i)
  77         shift
  78         [ "$#" -gt 0 ] || usage
  79         initrd="$1"
  80         ;;
  81     -d)
  82         shift
  83         [ "$#" -gt 0 ] || usage
  84         dtb="$1"
  85         ;;
  86     -s)
  87         shift
  88         [ "$#" -gt 0 ] || usage
  89         dts="$1"
  90         ;;
  91     -c)
  92         cacheit=y
  93         ;;
  94     -C)
  95         shift
  96         [ "$#" -gt 0 ] || usage
  97         CROSS="$1"
  98         ;;
  99     -D)
 100         shift
 101         [ "$#" -gt 0 ] || usage
 102         object="$1"
 103         objbin="$1"
 104         ;;
 105     -W)
 106         shift
 107         [ "$#" -gt 0 ] || usage
 108         tmpdir="$1"
 109         ;;
 110     --no-gzip)
 111         gzip=
 112         ;;
 113     -?)
 114         usage
 115         ;;
 116     *)
 117         [ -z "$kernel" ] || usage
 118         kernel="$1"
 119         ;;
 120     esac
 121     shift
 122 done
 123
 124 if [ -n "$dts" ]; then
 125     if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
 126         dts="$object/dts/$dts"
 127     fi
 128     if [ -z "$dtb" ]; then
 129         dtb="$platform.dtb"
 130     fi
 131     $dtc -O dtb -o "$dtb" -b 0 "$dts"
 132 fi
 133
 134 if [ -z "$kernel" ]; then
 135     kernel=vmlinux
 136 fi
 137
 138 platformo=$object/"$platform".o
 139 lds=$object/zImage.lds
 140 ext=strip
 141 objflags=-S
 142 tmp=$tmpdir/zImage.$$.o
 143 ksection=.kernel:vmlinux.strip
 144 isection=.kernel:initrd
 145 link_address='0x400000'
 146
 147 case "$platform" in
 148 pseries)
 149     platformo=$object/of.o
 150     link_address='0x4000000'
 151     ;;
 152 maple)
 153     platformo=$object/of.o
 154     link_address='0x400000'
 155     ;;
 156 pmac|chrp)
 157     platformo=$object/of.o
 158     ;;
 159 coff)
 160     platformo=$object/of.o
 161     lds=$object/zImage.coff.lds
 162     link_address='0x500000'
 163     ;;
 164 miboot|uboot)
 165     # miboot and U-boot want just the bare bits, not an ELF binary
 166     ext=bin
 167     objflags="-O binary"
 168     tmp="$ofile"
 169     ksection=image
 170     isection=initrd
 171     ;;
 172 cuboot*)
 173     binary=y
 174     gzip=
 175     case "$platform" in
 176     *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
 177         platformo=$object/cuboot-8xx.o
 178         ;;
 179     *5200*|*-motionpro)
 180         platformo=$object/cuboot-52xx.o
 181         ;;
 182     *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
 183         platformo=$object/cuboot-pq2.o
 184         ;;
 185     *-mpc824*)
 186         platformo=$object/cuboot-824x.o
 187         ;;
 188     *-mpc83*|*-asp834x*)
 189         platformo=$object/cuboot-83xx.o
 190         ;;
 191     *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
 192         platformo=$object/cuboot-85xx-cpm2.o
 193         ;;
 194     *-mpc85*|*-tqm85*|*-sbc85*)
 195         platformo=$object/cuboot-85xx.o
 196         ;;
 197     *-amigaone)
 198         link_address='0x800000'
 199         ;;
 200     esac
 201     ;;
 202 ps3)
 203     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 204     lds=$object/zImage.ps3.lds
 205     gzip=
 206     ext=bin
 207     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 208     ksection=.kernel:vmlinux.bin
 209     isection=.kernel:initrd
 210     link_address=''
 211     ;;
 212 ep88xc|ep405|ep8248e)
 213     platformo="$object/fixed-head.o $object/$platform.o"
 214     binary=y
 215     ;;
 216 adder875-redboot)
 217     platformo="$object/fixed-head.o $object/redboot-8xx.o"
 218     binary=y
 219     ;;
 220 simpleboot-virtex405-*)
 221     platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
 222     binary=y
 223     ;;
 224 simpleboot-virtex440-*)
 225     platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
 226     binary=y
 227     ;;
 228 simpleboot-*)
 229     platformo="$object/fixed-head.o $object/simpleboot.o"
 230     binary=y
 231     ;;
 232 asp834x-redboot)
 233     platformo="$object/fixed-head.o $object/redboot-83xx.o"
 234     binary=y
 235     ;;
 236 xpedite52*)
 237     link_address='0x1400000'
 238     platformo=$object/cuboot-85xx.o
 239     ;;
 240 gamecube|wii)
 241     link_address='0x600000'
 242     platformo="$object/$platform-head.o $object/$platform.o"
 243     ;;
 244 treeboot-iss4xx-mpic)
 245     platformo="$object/treeboot-iss4xx.o"
 246     ;;
 247 esac
 248
 249 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 250 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 251     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 252
 253     if [ -n "$gzip" ]; then
 254         gzip -f -9 "$vmz.$$"
 255     fi
 256
 257     if [ -n "$cacheit" ]; then
 258         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 259     else
 260         vmz="$vmz.$$"
 261     fi
 262 fi
 263
 264 vmz="$vmz$gzip"
 265
 266 # Extract kernel version information, some platforms want to include
 267 # it in the image header
 268 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 269     cut -d' ' -f3`
 270 if [ -n "$version" ]; then
 271     uboot_version="-n Linux-$version"
 272 fi
 273
 274 # physical offset of kernel image
 275 membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
 276
 277 case "$platform" in
 278 uboot)
 279     rm -f "$ofile"
 280     ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
 281         $uboot_version -d "$vmz" "$ofile"
 282     if [ -z "$cacheit" ]; then
 283         rm -f "$vmz"
 284     fi
 285     exit 0
 286     ;;
 287 esac
 288
 289 addsec() {
 290     ${CROSS}objcopy $4 $1 \
 291         --add-section=$3="$2" \
 292         --set-section-flags=$3=contents,alloc,load,readonly,data
 293 }
 294
 295 addsec $tmp "$vmz" $ksection $object/empty.o
 296 if [ -z "$cacheit" ]; then
 297     rm -f "$vmz"
 298 fi
 299
 300 if [ -n "$initrd" ]; then
 301     addsec $tmp "$initrd" $isection
 302 fi
 303
 304 if [ -n "$dtb" ]; then
 305     addsec $tmp "$dtb" .kernel:dtb
 306     if [ -n "$dts" ]; then
 307         rm $dtb
 308     fi
 309 fi
 310
 311 if [ "$platform" != "miboot" ]; then
 312     if [ -n "$link_address" ] ; then
 313         text_start="-Ttext $link_address --defsym _start=$link_address"
 314     fi
 315     ${CROSS}ld -m elf32ppc -T $lds $text_start -o "$ofile" \
 316         $platformo $tmp $object/wrapper.a
 317     rm $tmp
 318 fi
 319
 320 # Some platforms need the zImage's entry point and base address
 321 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 322 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 323
 324 if [ -n "$binary" ]; then
 325     mv "$ofile" "$ofile".elf
 326     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 327 fi
 328
 329 # post-processing needed for some platforms
 330 case "$platform" in
 331 pseries|chrp|maple)
 332     $objbin/addnote "$ofile"
 333     ;;
 334 coff)
 335     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 336     $objbin/hack-coff "$ofile"
 337     ;;
 338 cuboot*)
 339     gzip -f -9 "$ofile"
 340     ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 341             $uboot_version -d "$ofile".gz "$ofile"
 342     ;;
 343 treeboot*)
 344     mv "$ofile" "$ofile.elf"
 345     $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 346     if [ -z "$cacheit" ]; then
 347         rm -f "$ofile.elf"
 348     fi
 349     exit 0
 350     ;;
 351 ps3)
 352     # The ps3's loader supports loading a gzipped binary image from flash
 353     # rom to ram addr zero. The loader then enters the system reset
 354     # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
 355     # a binary image of the kernel to be at addr zero, and yet have a
 356     # suitable bootwrapper entry at 0x100.  To construct the final rom
 357     # image 512 bytes from offset 0x100 is copied to the bootwrapper
 358     # place holder at symbol __system_reset_kernel.  The 512 bytes of the
 359     # bootwrapper entry code at symbol __system_reset_overlay is then
 360     # copied to offset 0x100.  At runtime the bootwrapper program copies
 361     # the data at __system_reset_kernel back to addr 0x100.
 362
 363     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 364         | grep ' __system_reset_overlay$'       \
 365         | cut -d' ' -f1`
 366     system_reset_overlay=`printf "%d" $system_reset_overlay`
 367     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 368         | grep ' __system_reset_kernel$'       \
 369         | cut -d' ' -f1`
 370     system_reset_kernel=`printf "%d" $system_reset_kernel`
 371     overlay_dest="256"
 372     overlay_size="512"
 373
 374     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 375
 376     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 377         skip=$overlay_dest seek=$system_reset_kernel  \
 378         count=$overlay_size bs=1
 379
 380     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 381         skip=$system_reset_overlay seek=$overlay_dest \
 382         count=$overlay_size bs=1
 383
 384     odir="$(dirname "$ofile.bin")"
 385     rm -f "$odir/otheros.bld"
 386     gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
 387     ;;
 388 esac