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.
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
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 $kernel.strip.gz (use if present & newer, else make)
18 # -C prefix specify command prefix for cross-building tools
19 # (strip, objcopy, ld)
20 # -D dir specify directory containing data files used by script
21 # (default ./arch/powerpc/boot)
22 # -W dir specify working directory for temporary files (default .)
24 # Stop execution if any command fails
27 # Allow for verbose output
43 # cross-compilation prefix
46 # directory for object and other files used by this script
47 object=arch/powerpc/boot
49 # directory for working files
53 echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
54 echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
55 echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
59 while [ "$#" -gt 0 ]; do
63 [ "$#" -gt 0 ] || usage
68 [ "$#" -gt 0 ] || usage
73 [ "$#" -gt 0 ] || usage
78 [ "$#" -gt 0 ] || usage
83 [ "$#" -gt 0 ] || usage
91 [ "$#" -gt 0 ] || usage
96 [ "$#" -gt 0 ] || usage
101 [ "$#" -gt 0 ] || usage
111 [ -z "$kernel" ] || usage
118 if [ -n "$dts" ]; then
119 if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
120 dts="$object/dts/$dts"
122 if [ -z "$dtb" ]; then
125 dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts"
128 if [ -z "$kernel" ]; then
132 platformo=$object/"$platform".o
133 lds=$object/zImage.lds
136 tmp=$tmpdir/zImage.$$.o
137 ksection=.kernel:vmlinux.strip
138 isection=.kernel:initrd
142 platformo=$object/of.o
145 platformo=$object/of.o
146 lds=$object/zImage.coff.lds
149 # miboot and U-boot want just the bare bits, not an ELF binary
161 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
162 lds=$object/zImage.ps3.lds
165 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
166 ksection=.kernel:vmlinux.bin
167 isection=.kernel:initrd
170 platformo="$object/fixed-head.o $object/$platform.o"
175 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
176 if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
177 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
179 if [ -n "$gzip" ]; then
183 if [ -n "$cacheit" ]; then
184 mv -f "$vmz.$$$gzip" "$vmz$gzip"
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.]' | \
196 if [ -n "$version" ]; then
197 uboot_version="-n Linux-$version"
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
213 ${CROSS}objcopy $4 $1 \
214 --add-section=$3="$2" \
215 --set-section-flags=$3=contents,alloc,load,readonly,data
218 addsec $tmp "$vmz" $ksection $object/empty.o
219 if [ -z "$cacheit" ]; then
223 if [ -n "$initrd" ]; then
224 addsec $tmp "$initrd" $isection
227 if [ -n "$dtb" ]; then
228 addsec $tmp "$dtb" .kernel:dtb
229 if [ -n "$dts" ]; then
234 if [ "$platform" != "miboot" ]; then
235 ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
236 $platformo $tmp $object/wrapper.a
240 # Some platforms need the zImage's entry point and base address
241 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
242 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
244 if [ -n "$binary" ]; then
245 mv "$ofile" "$ofile".elf
246 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
249 # post-processing needed for some platforms
252 $object/addnote "$ofile"
255 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
256 $object/hack-coff "$ofile"
260 mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
261 $uboot_version -d "$ofile".gz "$ofile"
264 mv "$ofile" "$ofile.elf"
265 $object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
266 if [ -z "$cacheit" ]; then
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.
282 system_reset_overlay=0x`${CROSS}nm "$ofile" \
283 | grep ' __system_reset_overlay$' \
285 system_reset_overlay=`printf "%d" $system_reset_overlay`
286 system_reset_kernel=0x`${CROSS}nm "$ofile" \
287 | grep ' __system_reset_kernel$' \
289 system_reset_kernel=`printf "%d" $system_reset_kernel`
293 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
295 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
296 skip=$overlay_dest seek=$system_reset_kernel \
297 count=$overlay_size bs=1
299 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
300 skip=$system_reset_overlay seek=$overlay_dest \
301 count=$overlay_size bs=1
303 odir="$(dirname "$ofile.bin")"
304 rm -f "$odir/otheros.bld"
305 gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"