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=$object
  49
  50 # directory for working files
  51 tmpdir=.
  52
  53 usage() {
  54     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  55     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  56     echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
  57     exit 1
  58 }
  59
  60 while [ "$#" -gt 0 ]; do
  61     case "$1" in
  62     -o)
  63         shift
  64         [ "$#" -gt 0 ] || usage
  65         ofile="$1"
  66         ;;
  67     -p)
  68         shift
  69         [ "$#" -gt 0 ] || usage
  70         platform="$1"
  71         ;;
  72     -i)
  73         shift
  74         [ "$#" -gt 0 ] || usage
  75         initrd="$1"
  76         ;;
  77     -d)
  78         shift
  79         [ "$#" -gt 0 ] || usage
  80         dtb="$1"
  81         ;;
  82     -s)
  83         shift
  84         [ "$#" -gt 0 ] || usage
  85         dts="$1"
  86         ;;
  87     -c)
  88         cacheit=y
  89         ;;
  90     -C)
  91         shift
  92         [ "$#" -gt 0 ] || usage
  93         CROSS="$1"
  94         ;;
  95     -D)
  96         shift
  97         [ "$#" -gt 0 ] || usage
  98         object="$1"
  99         objbin="$1"
 100         ;;
 101     -W)
 102         shift
 103         [ "$#" -gt 0 ] || usage
 104         tmpdir="$1"
 105         ;;
 106     --no-gzip)
 107         gzip=
 108         ;;
 109     -?)
 110         usage
 111         ;;
 112     *)
 113         [ -z "$kernel" ] || usage
 114         kernel="$1"
 115         ;;
 116     esac
 117     shift
 118 done
 119
 120 if [ -n "$dts" ]; then
 121     if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
 122         dts="$object/dts/$dts"
 123     fi
 124     if [ -z "$dtb" ]; then
 125         dtb="$platform.dtb"
 126     fi
 127     $object/dtc -O dtb -o "$dtb" -b 0 "$dts"
 128 fi
 129
 130 if [ -z "$kernel" ]; then
 131     kernel=vmlinux
 132 fi
 133
 134 platformo=$object/"$platform".o
 135 lds=$object/zImage.lds
 136 ext=strip
 137 objflags=-S
 138 tmp=$tmpdir/zImage.$$.o
 139 ksection=.kernel:vmlinux.strip
 140 isection=.kernel:initrd
 141
 142 case "$platform" in
 143 pmac|pseries|chrp)
 144     platformo=$object/of.o
 145     ;;
 146 coff)
 147     platformo=$object/of.o
 148     lds=$object/zImage.coff.lds
 149     ;;
 150 miboot|uboot)
 151     # miboot and U-boot want just the bare bits, not an ELF binary
 152     ext=bin
 153     objflags="-O binary"
 154     tmp="$ofile"
 155     ksection=image
 156     isection=initrd
 157     ;;
 158 cuboot*)
 159     binary=y
 160     gzip=
 161     case "$platform" in
 162     *-mpc885ads|*-adder875*|*-ep88xc)
 163         platformo=$object/cuboot-8xx.o
 164         ;;
 165     *5200*|*-motionpro)
 166         platformo=$object/cuboot-52xx.o
 167         ;;
 168     *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
 169         platformo=$object/cuboot-pq2.o
 170         ;;
 171     *-mpc824*)
 172         platformo=$object/cuboot-824x.o
 173         ;;
 174     *-mpc83*)
 175         platformo=$object/cuboot-83xx.o
 176         ;;
 177     *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
 178         platformo=$object/cuboot-85xx-cpm2.o
 179         ;;
 180     *-mpc85*|*-tqm8540|*-sbc85*)
 181         platformo=$object/cuboot-85xx.o
 182         ;;
 183     esac
 184     ;;
 185 ps3)
 186     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 187     lds=$object/zImage.ps3.lds
 188     gzip=
 189     ext=bin
 190     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 191     ksection=.kernel:vmlinux.bin
 192     isection=.kernel:initrd
 193     ;;
 194 ep88xc|ep405|ep8248e)
 195     platformo="$object/fixed-head.o $object/$platform.o"
 196     binary=y
 197     ;;
 198 adder875-redboot)
 199     platformo="$object/fixed-head.o $object/redboot-8xx.o"
 200     binary=y
 201     ;;
 202 simpleboot-virtex405-*)
 203     platformo="$object/virtex405-head.o $object/simpleboot.o"
 204     binary=y
 205     ;;
 206 esac
 207
 208 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 209 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 210     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 211
 212     if [ -n "$gzip" ]; then
 213         gzip -f -9 "$vmz.$$"
 214     fi
 215
 216     if [ -n "$cacheit" ]; then
 217         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 218     else
 219         vmz="$vmz.$$"
 220     fi
 221 fi
 222
 223 vmz="$vmz$gzip"
 224
 225 # Extract kernel version information, some platforms want to include
 226 # it in the image header
 227 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 228     cut -d' ' -f3`
 229 if [ -n "$version" ]; then
 230     uboot_version="-n Linux-$version"
 231 fi
 232
 233 # physical offset of kernel image
 234 membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
 235
 236 case "$platform" in
 237 uboot)
 238     rm -f "$ofile"
 239     mkimage -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
 240         $uboot_version -d "$vmz" "$ofile"
 241     if [ -z "$cacheit" ]; then
 242         rm -f "$vmz"
 243     fi
 244     exit 0
 245     ;;
 246 esac
 247
 248 addsec() {
 249     ${CROSS}objcopy $4 $1 \
 250         --add-section=$3="$2" \
 251         --set-section-flags=$3=contents,alloc,load,readonly,data
 252 }
 253
 254 addsec $tmp "$vmz" $ksection $object/empty.o
 255 if [ -z "$cacheit" ]; then
 256     rm -f "$vmz"
 257 fi
 258
 259 if [ -n "$initrd" ]; then
 260     addsec $tmp "$initrd" $isection
 261 fi
 262
 263 if [ -n "$dtb" ]; then
 264     addsec $tmp "$dtb" .kernel:dtb
 265     if [ -n "$dts" ]; then
 266         rm $dtb
 267     fi
 268 fi
 269
 270 if [ "$platform" != "miboot" ]; then
 271     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 272         $platformo $tmp $object/wrapper.a
 273     rm $tmp
 274 fi
 275
 276 # Some platforms need the zImage's entry point and base address
 277 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 278 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 279
 280 if [ -n "$binary" ]; then
 281     mv "$ofile" "$ofile".elf
 282     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 283 fi
 284
 285 # post-processing needed for some platforms
 286 case "$platform" in
 287 pseries|chrp)
 288     $objbin/addnote "$ofile"
 289     ;;
 290 coff)
 291     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 292     $objbin/hack-coff "$ofile"
 293     ;;
 294 cuboot*)
 295     gzip -f -9 "$ofile"
 296     mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 297             $uboot_version -d "$ofile".gz "$ofile"
 298     ;;
 299 treeboot*)
 300     mv "$ofile" "$ofile.elf"
 301     $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 302     if [ -z "$cacheit" ]; then
 303         rm -f "$ofile.elf"
 304     fi
 305     exit 0
 306     ;;
 307 ps3)
 308     # The ps3's loader supports loading a gzipped binary image from flash
 309     # rom to ram addr zero. The loader then enters the system reset
 310     # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
 311     # a binary image of the kernel to be at addr zero, and yet have a
 312     # suitable bootwrapper entry at 0x100.  To construct the final rom
 313     # image 512 bytes from offset 0x100 is copied to the bootwrapper
 314     # place holder at symbol __system_reset_kernel.  The 512 bytes of the
 315     # bootwrapper entry code at symbol __system_reset_overlay is then
 316     # copied to offset 0x100.  At runtime the bootwrapper program copies
 317     # the data at __system_reset_kernel back to addr 0x100.
 318
 319     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 320         | grep ' __system_reset_overlay$'       \
 321         | cut -d' ' -f1`
 322     system_reset_overlay=`printf "%d" $system_reset_overlay`
 323     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 324         | grep ' __system_reset_kernel$'       \
 325         | cut -d' ' -f1`
 326     system_reset_kernel=`printf "%d" $system_reset_kernel`
 327     overlay_dest="256"
 328     overlay_size="512"
 329
 330     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 331
 332     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 333         skip=$overlay_dest seek=$system_reset_kernel  \
 334         count=$overlay_size bs=1
 335
 336     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 337         skip=$system_reset_overlay seek=$overlay_dest \
 338         count=$overlay_size bs=1
 339
 340     odir="$(dirname "$ofile.bin")"
 341     rm -f "$odir/otheros.bld"
 342     gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
 343     ;;
 344 esac