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 $kernel.strip.gz (use if present & newer, else make)
  18 # -C prefix     specify command prefix for cross-building tools
  19 #               (strip, objcopy, ld)
  20 # -D dir        specify directory containing data files used by script
  21 #               (default ./arch/powerpc/boot)
  22 # -W dir        specify working directory for temporary files (default .)
  23
  24 # defaults
  25 kernel=
  26 ofile=zImage
  27 platform=of
  28 initrd=
  29 dtb=
  30 dts=
  31 cacheit=
  32 binary=
  33 gzip=.gz
  34
  35 # cross-compilation prefix
  36 CROSS=
  37
  38 # directory for object and other files used by this script
  39 object=arch/powerpc/boot
  40
  41 # directory for working files
  42 tmpdir=.
  43
  44 usage() {
  45     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  46     echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
  47     echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
  48     exit 1
  49 }
  50
  51 while [ "$#" -gt 0 ]; do
  52     case "$1" in
  53     -o)
  54         shift
  55         [ "$#" -gt 0 ] || usage
  56         ofile="$1"
  57         ;;
  58     -p)
  59         shift
  60         [ "$#" -gt 0 ] || usage
  61         platform="$1"
  62         ;;
  63     -i)
  64         shift
  65         [ "$#" -gt 0 ] || usage
  66         initrd="$1"
  67         ;;
  68     -d)
  69         shift
  70         [ "$#" -gt 0 ] || usage
  71         dtb="$1"
  72         ;;
  73     -s)
  74         shift
  75         [ "$#" -gt 0 ] || usage
  76         dts="$1"
  77         ;;
  78     -c)
  79         cacheit=y
  80         ;;
  81     -C)
  82         shift
  83         [ "$#" -gt 0 ] || usage
  84         CROSS="$1"
  85         ;;
  86     -D)
  87         shift
  88         [ "$#" -gt 0 ] || usage
  89         object="$1"
  90         ;;
  91     -W)
  92         shift
  93         [ "$#" -gt 0 ] || usage
  94         tmpdir="$1"
  95         ;;
  96     --no-gzip)
  97         gzip=
  98         ;;
  99     -?)
 100         usage
 101         ;;
 102     *)
 103         [ -z "$kernel" ] || usage
 104         kernel="$1"
 105         ;;
 106     esac
 107     shift
 108 done
 109
 110 if [ -n "$dts" ]; then
 111     if [ -z "$dtb" ]; then
 112         dtb="$platform.dtb"
 113     fi
 114     dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts" || exit 1
 115 fi
 116
 117 if [ -z "$kernel" ]; then
 118     kernel=vmlinux
 119 fi
 120
 121 platformo=$object/"$platform".o
 122 lds=$object/zImage.lds
 123 ext=strip
 124 objflags=-S
 125 tmp=$tmpdir/zImage.$$.o
 126 ksection=.kernel:vmlinux.strip
 127 isection=.kernel:initrd
 128
 129 case "$platform" in
 130 pmac|pseries|chrp)
 131     platformo=$object/of.o
 132     ;;
 133 coff)
 134     platformo=$object/of.o
 135     lds=$object/zImage.coff.lds
 136     ;;
 137 miboot|uboot)
 138     # miboot and U-boot want just the bare bits, not an ELF binary
 139     ext=bin
 140     objflags="-O binary"
 141     tmp="$ofile"
 142     ksection=image
 143     isection=initrd
 144     ;;
 145 cuboot*)
 146     binary=y
 147     gzip=
 148     ;;
 149 ps3)
 150     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 151     lds=$object/zImage.ps3.lds
 152     binary=y
 153     gzip=
 154     ext=bin
 155     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 156     ksection=.kernel:vmlinux.bin
 157     isection=.kernel:initrd
 158     ;;
 159 ep88xc)
 160     platformo="$object/fixed-head.o $object/$platform.o"
 161     binary=y
 162     ;;
 163 esac
 164
 165 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 166 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
 167     ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 168
 169     if [ -n "$gzip" ]; then
 170         gzip -f -9 "$vmz.$$"
 171     fi
 172
 173     if [ -n "$cacheit" ]; then
 174         mv -f "$vmz.$$$gzip" "$vmz$gzip"
 175     else
 176         vmz="$vmz.$$"
 177     fi
 178 fi
 179
 180 vmz="$vmz$gzip"
 181
 182 # Extract kernel version information, some platforms want to include
 183 # it in the image header
 184 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 185     cut -d' ' -f3`
 186 if [ -n "$version" ]; then
 187     uboot_version="-n Linux-$version"
 188 fi
 189
 190 case "$platform" in
 191 uboot)
 192     rm -f "$ofile"
 193     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 194         $uboot_version -d "$vmz" "$ofile"
 195     if [ -z "$cacheit" ]; then
 196         rm -f "$vmz"
 197     fi
 198     exit 0
 199     ;;
 200 esac
 201
 202 addsec() {
 203     ${CROSS}objcopy $4 $1 \
 204         --add-section=$3="$2" \
 205         --set-section-flags=$3=contents,alloc,load,readonly,data
 206 }
 207
 208 addsec $tmp "$vmz" $ksection $object/empty.o
 209 if [ -z "$cacheit" ]; then
 210     rm -f "$vmz"
 211 fi
 212
 213 if [ -n "$initrd" ]; then
 214     addsec $tmp "$initrd" $isection
 215 fi
 216
 217 if [ -n "$dtb" ]; then
 218     addsec $tmp "$dtb" .kernel:dtb
 219     if [ -n "$dts" ]; then
 220         rm $dtb
 221     fi
 222 fi
 223
 224 if [ "$platform" != "miboot" ]; then
 225     ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
 226         $platformo $tmp $object/wrapper.a
 227     rm $tmp
 228 fi
 229
 230 # Some platforms need the zImage's entry point and base address
 231 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 232 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 233
 234 if [ -n "$binary" ]; then
 235     mv "$ofile" "$ofile".elf
 236     ${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin
 237 fi
 238
 239 # post-processing needed for some platforms
 240 case "$platform" in
 241 pseries|chrp)
 242     $object/addnote "$ofile"
 243     ;;
 244 coff)
 245     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 246     $object/hack-coff "$ofile"
 247     ;;
 248 cuboot*)
 249     gzip -f -9 "$ofile".bin
 250     mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 251             $uboot_version -d "$ofile".bin.gz "$ofile"
 252     ;;
 253 treeboot*)
 254     mv "$ofile" "$ofile.elf"
 255     $object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 256     if [ -z "$cacheit" ]; then
 257         rm -f "$ofile.elf"
 258     fi
 259     exit 0
 260     ;;
 261 ps3)
 262     # The ps3's loader supports loading gzipped binary images from flash
 263     # rom to addr zero. The loader enters the image at addr 0x100.  A
 264     # bootwrapper overlay is use to arrange for the kernel to be loaded
 265     # to addr zero and to have a suitable bootwrapper entry at 0x100.
 266     # To construct the rom image, 0x100 bytes from offset 0x100 in the
 267     # kernel is copied to the bootwrapper symbol __system_reset_kernel.
 268     # The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
 269     # then copied to offset 0x100.  At runtime the bootwrapper program
 270     # copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
 271
 272     system_reset_overlay=0x`${CROSS}nm "$ofile".elf \
 273         | grep ' __system_reset_overlay$'       \
 274         | cut -d' ' -f1`
 275     system_reset_overlay=`printf "%d" $system_reset_overlay`
 276     system_reset_kernel=0x`${CROSS}nm "$ofile".elf \
 277         | grep ' __system_reset_kernel$'       \
 278         | cut -d' ' -f1`
 279     system_reset_kernel=`printf "%d" $system_reset_kernel`
 280     overlay_dest="256"
 281     overlay_size="256"
 282
 283     rm -f "$object/otheros.bld"
 284
 285     msg=$(dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
 286         skip=$overlay_dest seek=$system_reset_kernel      \
 287         count=$overlay_size bs=1 2>&1)
 288
 289     if [ $? -ne "0" ]; then
 290        echo $msg
 291        exit 1
 292     fi
 293
 294     msg=$(dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
 295         skip=$system_reset_overlay seek=$overlay_dest     \
 296         count=$overlay_size bs=1 2>&1)
 297
 298     if [ $? -ne "0" ]; then
 299        echo $msg
 300        exit 2
 301     fi
 302
 303     gzip --force -9 --stdout "$ofile.bin" > "$object/otheros.bld"
 304     ;;
 305 esac