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
  49 # directory for working files
  50 tmpdir=.
  51
  52 usage() {
  53     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  54     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  55     echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
  56     exit 1
  57 }
  58
  59 while [ "$#" -gt 0 ]; do
  60     case "$1" in
  61     -o)
  62         shift
  63         [ "$#" -gt 0 ] || usage
  64         ofile="$1"
  65         ;;
  66     -p)
  67         shift
  68         [ "$#" -gt 0 ] || usage
  69         platform="$1"
  70         ;;
  71     -i)
  72         shift
  73         [ "$#" -gt 0 ] || usage
  74         initrd="$1"
  75         ;;
  76     -d)
  77         shift
  78         [ "$#" -gt 0 ] || usage
  79         dtb="$1"
  80         ;;
  81     -s)
  82         shift
  83         [ "$#" -gt 0 ] || usage
  84         dts="$1"
  85         ;;
  86     -c)
  87         cacheit=y
  88         ;;
  89     -C)
  90         shift
  91         [ "$#" -gt 0 ] || usage
  92         CROSS="$1"
  93         ;;
  94     -D)
  95         shift
  96         [ "$#" -gt 0 ] || usage
  97         object="$1"
  98         ;;
  99     -W)
 100         shift
 101         [ "$#" -gt 0 ] || usage
 102         tmpdir="$1"
 103         ;;
 104     --no-gzip)
 105         gzip=
 106         ;;
 107     -?)
 108         usage
 109         ;;
 110     *)
 111         [ -z "$kernel" ] || usage
 112         kernel="$1"
 113         ;;
 114     esac
 115     shift
 116 done
 117
 118 if [ -n "$dts" ]; then
 119     if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
 120         dts="$object/dts/$dts"
 121     fi
 122     if [ -z "$dtb" ]; then
 123         dtb="$platform.dtb"
 124     fi
 125     dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts"
 126 fi
 127
 128 if [ -z "$kernel" ]; then
 129     kernel=vmlinux
 130 fi
 131
 132 platformo=$object/"$platform".o
 133 lds=$object/zImage.lds
 134 ext=strip
 135 objflags=-S
 136 tmp=$tmpdir/zImage.$$.o
 137 ksection=.kernel:vmlinux.strip
 138 isection=.kernel:initrd
 139
 140 case "$platform" in
 141 pmac|pseries|chrp)
 142     platformo=$object/of.o
 143     ;;
 144 coff)
 145     platformo=$object/of.o
 146     lds=$object/zImage.coff.lds
 147     ;;
 148 miboot|uboot)
 149     # miboot and U-boot want just the bare bits, not an ELF binary
 150     ext=bin
 151     objflags="-O binary"
 152     tmp="$ofile"
 153     ksection=image
 154     isection=initrd
 155     ;;
 156 cuboot*)
 157     binary=y
 158     gzip=
 159     ;;
 160 ps3)
 161     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 162     lds=$object/zImage.ps3.lds
 163     gzip=
 164     ext=bin
 165     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 166     ksection=.kernel:vmlinux.bin
 167     isection=.kernel:initrd
 168     ;;
 169 ep88xc)
 170     platformo="$object/fixed-head.o $object/$platform.o"
 171     binary=y
 172     ;;
 173 esac
 174
 175 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 176 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 177     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 178
 179     if [ -n "$gzip" ]; then
 180         gzip -f -9 "$vmz.$$"
 181     fi
 182
 183     if [ -n "$cacheit" ]; then
 184         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 185     else
 186         vmz="$vmz.$$"
 187     fi
 188 fi
 189
 190 vmz="$vmz$gzip"
 191
 192 # Extract kernel version information, some platforms want to include
 193 # it in the image header
 194 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 195     cut -d' ' -f3`
 196 if [ -n "$version" ]; then
 197     uboot_version="-n Linux-$version"
 198 fi
 199
 200 case "$platform" in
 201 uboot)
 202     rm -f "$ofile"
 203     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 204         $uboot_version -d "$vmz" "$ofile"
 205     if [ -z "$cacheit" ]; then
 206         rm -f "$vmz"
 207     fi
 208     exit 0
 209     ;;
 210 esac
 211
 212 addsec() {
 213     ${CROSS}objcopy $4 $1 \
 214         --add-section=$3="$2" \
 215         --set-section-flags=$3=contents,alloc,load,readonly,data
 216 }
 217
 218 addsec $tmp "$vmz" $ksection $object/empty.o
 219 if [ -z "$cacheit" ]; then
 220     rm -f "$vmz"
 221 fi
 222
 223 if [ -n "$initrd" ]; then
 224     addsec $tmp "$initrd" $isection
 225 fi
 226
 227 if [ -n "$dtb" ]; then
 228     addsec $tmp "$dtb" .kernel:dtb
 229     if [ -n "$dts" ]; then
 230         rm $dtb
 231     fi
 232 fi
 233
 234 if [ "$platform" != "miboot" ]; then
 235     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 236         $platformo $tmp $object/wrapper.a
 237     rm $tmp
 238 fi
 239
 240 # Some platforms need the zImage's entry point and base address
 241 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 242 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 243
 244 if [ -n "$binary" ]; then
 245     mv "$ofile" "$ofile".elf
 246     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 247 fi
 248
 249 # post-processing needed for some platforms
 250 case "$platform" in
 251 pseries|chrp)
 252     $object/addnote "$ofile"
 253     ;;
 254 coff)
 255     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 256     $object/hack-coff "$ofile"
 257     ;;
 258 cuboot*)
 259     gzip -f -9 "$ofile"
 260     mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 261             $uboot_version -d "$ofile".gz "$ofile"
 262     ;;
 263 treeboot*)
 264     mv "$ofile" "$ofile.elf"
 265     $object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 266     if [ -z "$cacheit" ]; then
 267         rm -f "$ofile.elf"
 268     fi
 269     exit 0
 270     ;;
 271 ps3)
 272     # The ps3's loader supports loading gzipped binary images from flash
 273     # rom to addr zero. The loader enters the image at addr 0x100.  A
 274     # bootwrapper overlay is use to arrange for the kernel to be loaded
 275     # to addr zero and to have a suitable bootwrapper entry at 0x100.
 276     # To construct the rom image, 0x100 bytes from offset 0x100 in the
 277     # kernel is copied to the bootwrapper symbol __system_reset_kernel.
 278     # The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
 279     # then copied to offset 0x100.  At runtime the bootwrapper program
 280     # copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
 281
 282     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 283         | grep ' __system_reset_overlay$'       \
 284         | cut -d' ' -f1`
 285     system_reset_overlay=`printf "%d" $system_reset_overlay`
 286     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 287         | grep ' __system_reset_kernel$'       \
 288         | cut -d' ' -f1`
 289     system_reset_kernel=`printf "%d" $system_reset_kernel`
 290     overlay_dest="256"
 291     overlay_size="256"
 292
 293     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 294
 295     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 296         skip=$overlay_dest seek=$system_reset_kernel  \
 297         count=$overlay_size bs=1
 298
 299     dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 300         skip=$system_reset_overlay seek=$overlay_dest \
 301         count=$overlay_size bs=1
 302
 303     odir="$(dirname "$ofile.bin")"
 304     rm -f "$odir/otheros.bld"
 305     gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
 306     ;;
 307 esac