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 $kernel.strip.gz (use if present & newer, else make)
  18 # -C prefix     specify command prefix for cross-building tools
  19 #               (strip, objcopy, ld)
  20 # -D dir        specify directory containing data files used by script
  21 #               (default ./arch/powerpc/boot)
  22 # -W dir        specify working directory for temporary files (default .)
  23 # -z            use gzip (legacy)
  24 # -Z zsuffix    compression to use (gz, xz or none)
  25
  26 # Stop execution if any command fails
  27 set -e
  28
  29 # Allow for verbose output
  30 if [ "$V" = 1 ]; then
  31     set -x
  32 fi
  33
  34 # defaults
  35 kernel=
  36 ofile=zImage
  37 platform=of
  38 initrd=
  39 dtb=
  40 dts=
  41 cacheit=
  42 binary=
  43 compression=.gz
  44 pie=
  45 format=
  46
  47 # cross-compilation prefix
  48 CROSS=
  49
  50 # mkimage wrapper script
  51 MKIMAGE=$srctree/scripts/mkuboot.sh
  52
  53 # directory for object and other files used by this script
  54 object=arch/powerpc/boot
  55 objbin=$object
  56 dtc=scripts/dtc/dtc
  57
  58 # directory for working files
  59 tmpdir=.
  60
  61 usage() {
  62     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  63     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  64     echo '       [-D datadir] [-W workingdir] [-Z (gz|xz|none)]' >&2
  65     echo '       [--no-compression] [vmlinux]' >&2
  66     exit 1
  67 }
  68
  69 run_cmd() {
  70     if [ "$V" = 1 ]; then
  71         $* 2>&1
  72     else
  73         local msg
  74
  75         set +e
  76         msg=$($* 2>&1)
  77
  78         if [ $? -ne "0" ]; then
  79                 echo $msg
  80                 exit 1
  81         fi
  82         set -e
  83     fi
  84 }
  85
  86 while [ "$#" -gt 0 ]; do
  87     case "$1" in
  88     -o)
  89         shift
  90         [ "$#" -gt 0 ] || usage
  91         ofile="$1"
  92         ;;
  93     -p)
  94         shift
  95         [ "$#" -gt 0 ] || usage
  96         platform="$1"
  97         ;;
  98     -i)
  99         shift
 100         [ "$#" -gt 0 ] || usage
 101         initrd="$1"
 102         ;;
 103     -d)
 104         shift
 105         [ "$#" -gt 0 ] || usage
 106         dtb="$1"
 107         ;;
 108     -s)
 109         shift
 110         [ "$#" -gt 0 ] || usage
 111         dts="$1"
 112         ;;
 113     -c)
 114         cacheit=y
 115         ;;
 116     -C)
 117         shift
 118         [ "$#" -gt 0 ] || usage
 119         CROSS="$1"
 120         ;;
 121     -D)
 122         shift
 123         [ "$#" -gt 0 ] || usage
 124         object="$1"
 125         objbin="$1"
 126         ;;
 127     -W)
 128         shift
 129         [ "$#" -gt 0 ] || usage
 130         tmpdir="$1"
 131         ;;
 132     -z)
 133         compression=.gz
 134         ;;
 135     -Z)
 136         shift
 137         [ "$#" -gt 0 ] || usage
 138         [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "none" ] || usage
 139
 140         compression=".$1"
 141
 142         if [ $compression = ".none" ]; then
 143                 compression=
 144         fi
 145         ;;
 146     --no-gzip)
 147         # a "feature" of the the wrapper script is that it can be used outside
 148         # the kernel tree. So keeping this around for backwards compatibility.
 149         compression=
 150         ;;
 151     -?)
 152         usage
 153         ;;
 154     *)
 155         [ -z "$kernel" ] || usage
 156         kernel="$1"
 157         ;;
 158     esac
 159     shift
 160 done
 161
 162
 163 if [ -n "$dts" ]; then
 164     if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
 165         dts="$object/dts/$dts"
 166     fi
 167     if [ -z "$dtb" ]; then
 168         dtb="$platform.dtb"
 169     fi
 170     $dtc -O dtb -o "$dtb" -b 0 "$dts"
 171 fi
 172
 173 if [ -z "$kernel" ]; then
 174     kernel=vmlinux
 175 fi
 176
 177 LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
 178 case "$elfformat" in
 179     elf64-powerpcle)    format=elf64lppc        ;;
 180     elf64-powerpc)      format=elf32ppc ;;
 181     elf32-powerpc)      format=elf32ppc ;;
 182 esac
 183
 184 ld_version()
 185 {
 186     # Poached from scripts/ld-version.sh, but we don't want to call that because
 187     # this script (wrapper) is distributed separately from the kernel source.
 188     # Extract linker version number from stdin and turn into single number.
 189     awk '{
 190         gsub(".*\\)", "");
 191         gsub(".*version ", "");
 192         gsub("-.*", "");
 193         split($1,a, ".");
 194         print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
 195         exit
 196     }'
 197 }
 198
 199 # Do not include PT_INTERP segment when linking pie. Non-pie linking
 200 # just ignores this option.
 201 LD_VERSION=$(${CROSS}ld --version | ld_version)
 202 LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
 203 if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
 204         nodl="--no-dynamic-linker"
 205 fi
 206
 207 platformo=$object/"$platform".o
 208 lds=$object/zImage.lds
 209 ext=strip
 210 objflags=-S
 211 tmp=$tmpdir/zImage.$$.o
 212 ksection=.kernel:vmlinux.strip
 213 isection=.kernel:initrd
 214 link_address='0x400000'
 215 make_space=y
 216
 217 case "$platform" in
 218 of)
 219     platformo="$object/of.o $object/epapr.o"
 220     make_space=n
 221     ;;
 222 pseries)
 223     platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
 224     link_address='0x4000000'
 225     if [ "$format" != "elf32ppc" ]; then
 226         link_address=
 227         pie=-pie
 228     fi
 229     make_space=n
 230     ;;
 231 maple)
 232     platformo="$object/of.o $object/epapr.o"
 233     link_address='0x400000'
 234     make_space=n
 235     ;;
 236 pmac|chrp)
 237     platformo="$object/of.o $object/epapr.o"
 238     make_space=n
 239     ;;
 240 coff)
 241     platformo="$object/crt0.o $object/of.o $object/epapr.o"
 242     lds=$object/zImage.coff.lds
 243     link_address='0x500000'
 244     make_space=n
 245     pie=
 246     ;;
 247 miboot|uboot*)
 248     # miboot and U-boot want just the bare bits, not an ELF binary
 249     ext=bin
 250     objflags="-O binary"
 251     tmp="$ofile"
 252     ksection=image
 253     isection=initrd
 254     ;;
 255 cuboot*)
 256     binary=y
 257     compression=
 258     case "$platform" in
 259     *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
 260         platformo=$object/cuboot-8xx.o
 261         ;;
 262     *5200*|*-motionpro)
 263         platformo=$object/cuboot-52xx.o
 264         ;;
 265     *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
 266         platformo=$object/cuboot-pq2.o
 267         ;;
 268     *-mpc824*)
 269         platformo=$object/cuboot-824x.o
 270         ;;
 271     *-mpc83*|*-asp834x*)
 272         platformo=$object/cuboot-83xx.o
 273         ;;
 274     *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
 275         platformo=$object/cuboot-85xx-cpm2.o
 276         ;;
 277     *-mpc85*|*-tqm85*|*-sbc85*)
 278         platformo=$object/cuboot-85xx.o
 279         ;;
 280     *-amigaone)
 281         link_address='0x800000'
 282         ;;
 283     esac
 284     ;;
 285 ps3)
 286     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 287     lds=$object/zImage.ps3.lds
 288     compression=
 289     ext=bin
 290     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 291     ksection=.kernel:vmlinux.bin
 292     isection=.kernel:initrd
 293     link_address=''
 294     make_space=n
 295     pie=
 296     ;;
 297 ep88xc|ep405|ep8248e)
 298     platformo="$object/fixed-head.o $object/$platform.o"
 299     binary=y
 300     ;;
 301 adder875-redboot)
 302     platformo="$object/fixed-head.o $object/redboot-8xx.o"
 303     binary=y
 304     ;;
 305 simpleboot-virtex405-*)
 306     platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
 307     binary=y
 308     ;;
 309 simpleboot-virtex440-*)
 310     platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
 311     binary=y
 312     ;;
 313 simpleboot-*)
 314     platformo="$object/fixed-head.o $object/simpleboot.o"
 315     binary=y
 316     ;;
 317 asp834x-redboot)
 318     platformo="$object/fixed-head.o $object/redboot-83xx.o"
 319     binary=y
 320     ;;
 321 xpedite52*)
 322     link_address='0x1400000'
 323     platformo=$object/cuboot-85xx.o
 324     ;;
 325 gamecube|wii)
 326     link_address='0x600000'
 327     platformo="$object/$platform-head.o $object/$platform.o"
 328     ;;
 329 treeboot-currituck)
 330     link_address='0x1000000'
 331     ;;
 332 treeboot-akebono)
 333     link_address='0x1000000'
 334     ;;
 335 treeboot-iss4xx-mpic)
 336     platformo="$object/treeboot-iss4xx.o"
 337     ;;
 338 epapr)
 339     platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
 340     link_address='0x20000000'
 341     pie=-pie
 342     ;;
 343 mvme5100)
 344     platformo="$object/fixed-head.o $object/mvme5100.o"
 345     binary=y
 346     ;;
 347 mvme7100)
 348     platformo="$object/motload-head.o $object/mvme7100.o"
 349     link_address='0x4000000'
 350     binary=y
 351     ;;
 352 esac
 353
 354 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 355
 356 # Calculate the vmlinux.strip size
 357 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 358 strip_size=$(stat -c %s $vmz.$$)
 359
 360 if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
 361     # recompress the image if we need to
 362     case $compression in
 363     .xz)
 364         xz --check=crc32 -f -6 "$vmz.$$"
 365         ;;
 366     .gz)
 367         gzip -n -f -9 "$vmz.$$"
 368         ;;
 369     *)
 370         # drop the compression suffix so the stripped vmlinux is used
 371         compression=
 372         ;;
 373     esac
 374
 375     if [ -n "$cacheit" ]; then
 376         mv -f "$vmz.$$$compression" "$vmz$compression"
 377     else
 378         vmz="$vmz.$$"
 379     fi
 380 else
 381     rm -f $vmz.$$
 382 fi
 383
 384 vmz="$vmz$compression"
 385
 386 if [ "$make_space" = "y" ]; then
 387         # Round the size to next higher MB limit
 388         round_size=$(((strip_size + 0xfffff) & 0xfff00000))
 389
 390         round_size=0x$(printf "%x" $round_size)
 391         link_addr=$(printf "%d" $link_address)
 392
 393         if [ $link_addr -lt $strip_size ]; then
 394             echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
 395                         "overlaps the address of the wrapper($link_address)"
 396             echo "INFO: Fixing the link_address of wrapper to ($round_size)"
 397             link_address=$round_size
 398         fi
 399 fi
 400
 401 # Extract kernel version information, some platforms want to include
 402 # it in the image header
 403 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 404     cut -d' ' -f3`
 405 if [ -n "$version" ]; then
 406     uboot_version="-n Linux-$version"
 407 fi
 408
 409 # physical offset of kernel image
 410 membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
 411
 412 case "$platform" in
 413 uboot)
 414     rm -f "$ofile"
 415     ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
 416         $uboot_version -d "$vmz" "$ofile"
 417     if [ -z "$cacheit" ]; then
 418         rm -f "$vmz"
 419     fi
 420     exit 0
 421     ;;
 422 uboot-obs600)
 423     rm -f "$ofile"
 424     # obs600 wants a multi image with an initrd, so we need to put a fake
 425     # one in even when building a "normal" image.
 426     if [ -n "$initrd" ]; then
 427         real_rd="$initrd"
 428     else
 429         real_rd=`mktemp`
 430         echo "\0" >>"$real_rd"
 431     fi
 432     ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
 433         $uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
 434     if [ -z "$initrd" ]; then
 435         rm -f "$real_rd"
 436     fi
 437     if [ -z "$cacheit" ]; then
 438         rm -f "$vmz"
 439     fi
 440     exit 0
 441     ;;
 442 esac
 443
 444 addsec() {
 445     ${CROSS}objcopy $4 $1 \
 446         --add-section=$3="$2" \
 447         --set-section-flags=$3=contents,alloc,load,readonly,data
 448 }
 449
 450 addsec $tmp "$vmz" $ksection $object/empty.o
 451 if [ -z "$cacheit" ]; then
 452     rm -f "$vmz"
 453 fi
 454
 455 if [ -n "$initrd" ]; then
 456     addsec $tmp "$initrd" $isection
 457 fi
 458
 459 if [ -n "$dtb" ]; then
 460     addsec $tmp "$dtb" .kernel:dtb
 461     if [ -n "$dts" ]; then
 462         rm $dtb
 463     fi
 464 fi
 465
 466 if [ "$platform" != "miboot" ]; then
 467     if [ -n "$link_address" ] ; then
 468         text_start="-Ttext $link_address"
 469     fi
 470 #link everything
 471     ${CROSS}ld -m $format -T $lds $text_start $pie $nodl -o "$ofile" \
 472         $platformo $tmp $object/wrapper.a
 473     rm $tmp
 474 fi
 475
 476 # Some platforms need the zImage's entry point and base address
 477 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 478 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 479
 480 if [ -n "$binary" ]; then
 481     mv "$ofile" "$ofile".elf
 482     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 483 fi
 484
 485 # post-processing needed for some platforms
 486 case "$platform" in
 487 pseries|chrp|maple)
 488     $objbin/addnote "$ofile"
 489     ;;
 490 coff)
 491     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 492     $objbin/hack-coff "$ofile"
 493     ;;
 494 cuboot*)
 495     gzip -n -f -9 "$ofile"
 496     ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 497             $uboot_version -d "$ofile".gz "$ofile"
 498     ;;
 499 treeboot*)
 500     mv "$ofile" "$ofile.elf"
 501     $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 502     if [ -z "$cacheit" ]; then
 503         rm -f "$ofile.elf"
 504     fi
 505     exit 0
 506     ;;
 507 ps3)
 508     # The ps3's loader supports loading a gzipped binary image from flash
 509     # rom to ram addr zero. The loader then enters the system reset
 510     # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
 511     # a binary image of the kernel to be at addr zero, and yet have a
 512     # suitable bootwrapper entry at 0x100.  To construct the final rom
 513     # image 512 bytes from offset 0x100 is copied to the bootwrapper
 514     # place holder at symbol __system_reset_kernel.  The 512 bytes of the
 515     # bootwrapper entry code at symbol __system_reset_overlay is then
 516     # copied to offset 0x100.  At runtime the bootwrapper program copies
 517     # the data at __system_reset_kernel back to addr 0x100.
 518
 519     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 520         | grep ' __system_reset_overlay$'       \
 521         | cut -d' ' -f1`
 522     system_reset_overlay=`printf "%d" $system_reset_overlay`
 523     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 524         | grep ' __system_reset_kernel$'       \
 525         | cut -d' ' -f1`
 526     system_reset_kernel=`printf "%d" $system_reset_kernel`
 527     overlay_dest="256"
 528     overlay_size="512"
 529
 530     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 531
 532     run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 533         skip=$overlay_dest seek=$system_reset_kernel          \
 534         count=$overlay_size bs=1
 535
 536     run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 537         skip=$system_reset_overlay seek=$overlay_dest         \
 538         count=$overlay_size bs=1
 539
 540     odir="$(dirname "$ofile.bin")"
 541     rm -f "$odir/otheros.bld"
 542     gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
 543     ;;
 544 esac