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