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.$$.o
 139 ksection=.kernel:vmlinux.strip
 140 isection=.kernel:initrd
 141
 142 case "$platform" in
 143 pmac|pseries|chrp)
 144     platformo=$object/of.o
 145     ;;
 146 coff)
 147     platformo=$object/of.o
 148     lds=$object/zImage.coff.lds
 149     ;;
 150 miboot|uboot)
 151     # miboot and U-boot want just the bare bits, not an ELF binary
 152     ext=bin
 153     objflags="-O binary"
 154     tmp="$ofile"
 155     ksection=image
 156     isection=initrd
 157     ;;
 158 cuboot*)
 159     binary=y
 160     gzip=
 161     ;;
 162 ps3)
 163     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 164     lds=$object/zImage.ps3.lds
 165     gzip=
 166     ext=bin
 167     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 168     ksection=.kernel:vmlinux.bin
 169     isection=.kernel:initrd
 170     ;;
 171 ep88xc|ep405|redboot*|ep8248e)
 172     platformo="$object/fixed-head.o $object/$platform.o"
 173     binary=y
 174     ;;
 175 esac
 176
 177 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 178 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 179     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 180
 181     if [ -n "$gzip" ]; then
 182         gzip -f -9 "$vmz.$$"
 183     fi
 184
 185     if [ -n "$cacheit" ]; then
 186         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 187     else
 188         vmz="$vmz.$$"
 189     fi
 190 fi
 191
 192 vmz="$vmz$gzip"
 193
 194 # Extract kernel version information, some platforms want to include
 195 # it in the image header
 196 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 197     cut -d' ' -f3`
 198 if [ -n "$version" ]; then
 199     uboot_version="-n Linux-$version"
 200 fi
 201
 202 case "$platform" in
 203 uboot)
 204     rm -f "$ofile"
 205     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 206         $uboot_version -d "$vmz" "$ofile"
 207     if [ -z "$cacheit" ]; then
 208         rm -f "$vmz"
 209     fi
 210     exit 0
 211     ;;
 212 esac
 213
 214 addsec() {
 215     ${CROSS}objcopy $4 $1 \
 216         --add-section=$3="$2" \
 217         --set-section-flags=$3=contents,alloc,load,readonly,data
 218 }
 219
 220 addsec $tmp "$vmz" $ksection $object/empty.o
 221 if [ -z "$cacheit" ]; then
 222     rm -f "$vmz"
 223 fi
 224
 225 if [ -n "$initrd" ]; then
 226     addsec $tmp "$initrd" $isection
 227 fi
 228
 229 if [ -n "$dtb" ]; then
 230     addsec $tmp "$dtb" .kernel:dtb
 231     if [ -n "$dts" ]; then
 232         rm $dtb
 233     fi
 234 fi
 235
 236 if [ "$platform" != "miboot" ]; then
 237     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 238         $platformo $tmp $object/wrapper.a
 239     rm $tmp
 240 fi
 241
 242 # Some platforms need the zImage's entry point and base address
 243 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 244 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 245
 246 if [ -n "$binary" ]; then
 247     mv "$ofile" "$ofile".elf
 248     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 249 fi
 250
 251 # post-processing needed for some platforms
 252 case "$platform" in
 253 pseries|chrp)
 254     $objbin/addnote "$ofile"
 255     ;;
 256 coff)
 257     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 258     $objbin/hack-coff "$ofile"
 259     ;;
 260 cuboot*)
 261     gzip -f -9 "$ofile"
 262     mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 263             $uboot_version -d "$ofile".gz "$ofile"
 264     ;;
 265 treeboot*)
 266     mv "$ofile" "$ofile.elf"
 267     $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 268     if [ -z "$cacheit" ]; then
 269         rm -f "$ofile.elf"
 270     fi
 271     exit 0
 272     ;;
 273 ps3)
 274     # The ps3's loader supports loading gzipped binary images from flash
 275     # rom to addr zero. The loader enters the image at addr 0x100.  A
 276     # bootwrapper overlay is use to arrange for the kernel to be loaded
 277     # to addr zero and to have a suitable bootwrapper entry at 0x100.
 278     # To construct the rom image, 0x100 bytes from offset 0x100 in the
 279     # kernel is copied to the bootwrapper symbol __system_reset_kernel.
 280     # The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
 281     # then copied to offset 0x100.  At runtime the bootwrapper program
 282     # copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
 283
 284     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 285         | grep ' __system_reset_overlay$'       \
 286         | cut -d' ' -f1`
 287     system_reset_overlay=`printf "%d" $system_reset_overlay`
 288     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 289         | grep ' __system_reset_kernel$'       \
 290         | cut -d' ' -f1`
 291     system_reset_kernel=`printf "%d" $system_reset_kernel`
 292     overlay_dest="256"
 293     overlay_size="256"
 294
 295     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 296
 297     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 298         skip=$overlay_dest seek=$system_reset_kernel  \
 299         count=$overlay_size bs=1
 300
 301     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 302         skip=$system_reset_overlay seek=$overlay_dest \
 303         count=$overlay_size bs=1
 304
 305     odir="$(dirname "$ofile.bin")"
 306     rm -f "$odir/otheros.bld"
 307     gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
 308     ;;
 309 esac