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