xref: /openbmc/linux/arch/powerpc/boot/wrapper (revision 80483c3a) 
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 $kernel.strip.gz (use if present & newer, else make)
18# -C prefix	specify command prefix for cross-building tools
19#		(strip, objcopy, ld)
20# -D dir	specify directory containing data files used by script
21#		(default ./arch/powerpc/boot)
22# -W dir	specify working directory for temporary files (default .)
23
24# Stop execution if any command fails
25set -e
26
27# Allow for verbose output
28if [ "$V" = 1 ]; then
29    set -x
30fi
31
32# defaults
33kernel=
34ofile=zImage
35platform=of
36initrd=
37dtb=
38dts=
39cacheit=
40binary=
41gzip=.gz
42pie=
43format=
44
45# cross-compilation prefix
46CROSS=
47
48# mkimage wrapper script
49MKIMAGE=$srctree/scripts/mkuboot.sh
50
51# directory for object and other files used by this script
52object=arch/powerpc/boot
53objbin=$object
54dtc=scripts/dtc/dtc
55
56# directory for working files
57tmpdir=.
58
59usage() {
60    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
61    echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
62    echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
63    exit 1
64}
65
66run_cmd() {
67    if [ "$V" = 1 ]; then
68        $* 2>&1
69    else
70        local msg
71
72        set +e
73        msg=$($* 2>&1)
74
75        if [ $? -ne "0" ]; then
76                echo $msg
77                exit 1
78        fi
79        set -e
80    fi
81}
82
83while [ "$#" -gt 0 ]; do
84    case "$1" in
85    -o)
86	shift
87	[ "$#" -gt 0 ] || usage
88	ofile="$1"
89	;;
90    -p)
91	shift
92	[ "$#" -gt 0 ] || usage
93	platform="$1"
94	;;
95    -i)
96	shift
97	[ "$#" -gt 0 ] || usage
98	initrd="$1"
99	;;
100    -d)
101	shift
102	[ "$#" -gt 0 ] || usage
103	dtb="$1"
104	;;
105    -s)
106	shift
107	[ "$#" -gt 0 ] || usage
108	dts="$1"
109	;;
110    -c)
111	cacheit=y
112	;;
113    -C)
114	shift
115	[ "$#" -gt 0 ] || usage
116	CROSS="$1"
117	;;
118    -D)
119	shift
120	[ "$#" -gt 0 ] || usage
121	object="$1"
122	objbin="$1"
123	;;
124    -W)
125	shift
126	[ "$#" -gt 0 ] || usage
127	tmpdir="$1"
128	;;
129    --no-gzip)
130        gzip=
131        ;;
132    -?)
133	usage
134	;;
135    *)
136	[ -z "$kernel" ] || usage
137	kernel="$1"
138	;;
139    esac
140    shift
141done
142
143if [ -n "$dts" ]; then
144    if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
145	dts="$object/dts/$dts"
146    fi
147    if [ -z "$dtb" ]; then
148	dtb="$platform.dtb"
149    fi
150    $dtc -O dtb -o "$dtb" -b 0 "$dts"
151fi
152
153if [ -z "$kernel" ]; then
154    kernel=vmlinux
155fi
156
157LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
158case "$elfformat" in
159    elf64-powerpcle)	format=elf64lppc	;;
160    elf64-powerpc)	format=elf32ppc	;;
161    elf32-powerpc)	format=elf32ppc	;;
162esac
163
164
165platformo=$object/"$platform".o
166lds=$object/zImage.lds
167ext=strip
168objflags=-S
169tmp=$tmpdir/zImage.$$.o
170ksection=.kernel:vmlinux.strip
171isection=.kernel:initrd
172link_address='0x400000'
173make_space=y
174
175case "$platform" in
176of)
177    platformo="$object/of.o $object/epapr.o"
178    make_space=n
179    ;;
180pseries)
181    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
182    link_address='0x4000000'
183    if [ "$format" != "elf32ppc" ]; then
184	link_address=
185	pie=-pie
186    fi
187    make_space=n
188    ;;
189maple)
190    platformo="$object/of.o $object/epapr.o"
191    link_address='0x400000'
192    make_space=n
193    ;;
194pmac|chrp)
195    platformo="$object/of.o $object/epapr.o"
196    make_space=n
197    ;;
198coff)
199    platformo="$object/crt0.o $object/of.o $object/epapr.o"
200    lds=$object/zImage.coff.lds
201    link_address='0x500000'
202    make_space=n
203    pie=
204    ;;
205miboot|uboot*)
206    # miboot and U-boot want just the bare bits, not an ELF binary
207    ext=bin
208    objflags="-O binary"
209    tmp="$ofile"
210    ksection=image
211    isection=initrd
212    ;;
213cuboot*)
214    binary=y
215    gzip=
216    case "$platform" in
217    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
218        platformo=$object/cuboot-8xx.o
219        ;;
220    *5200*|*-motionpro)
221        platformo=$object/cuboot-52xx.o
222        ;;
223    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
224        platformo=$object/cuboot-pq2.o
225        ;;
226    *-mpc824*)
227        platformo=$object/cuboot-824x.o
228        ;;
229    *-mpc83*|*-asp834x*)
230        platformo=$object/cuboot-83xx.o
231        ;;
232    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
233        platformo=$object/cuboot-85xx-cpm2.o
234        ;;
235    *-mpc85*|*-tqm85*|*-sbc85*)
236        platformo=$object/cuboot-85xx.o
237        ;;
238    *-amigaone)
239        link_address='0x800000'
240        ;;
241    esac
242    ;;
243ps3)
244    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
245    lds=$object/zImage.ps3.lds
246    gzip=
247    ext=bin
248    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
249    ksection=.kernel:vmlinux.bin
250    isection=.kernel:initrd
251    link_address=''
252    make_space=n
253    pie=
254    ;;
255ep88xc|ep405|ep8248e)
256    platformo="$object/fixed-head.o $object/$platform.o"
257    binary=y
258    ;;
259adder875-redboot)
260    platformo="$object/fixed-head.o $object/redboot-8xx.o"
261    binary=y
262    ;;
263simpleboot-virtex405-*)
264    platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
265    binary=y
266    ;;
267simpleboot-virtex440-*)
268    platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
269    binary=y
270    ;;
271simpleboot-*)
272    platformo="$object/fixed-head.o $object/simpleboot.o"
273    binary=y
274    ;;
275asp834x-redboot)
276    platformo="$object/fixed-head.o $object/redboot-83xx.o"
277    binary=y
278    ;;
279xpedite52*)
280    link_address='0x1400000'
281    platformo=$object/cuboot-85xx.o
282    ;;
283gamecube|wii)
284    link_address='0x600000'
285    platformo="$object/$platform-head.o $object/$platform.o"
286    ;;
287treeboot-currituck)
288    link_address='0x1000000'
289    ;;
290treeboot-akebono)
291    link_address='0x1000000'
292    ;;
293treeboot-iss4xx-mpic)
294    platformo="$object/treeboot-iss4xx.o"
295    ;;
296epapr)
297    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
298    link_address='0x20000000'
299    pie=-pie
300    ;;
301mvme5100)
302    platformo="$object/fixed-head.o $object/mvme5100.o"
303    binary=y
304    ;;
305mvme7100)
306    platformo="$object/motload-head.o $object/mvme7100.o"
307    link_address='0x4000000'
308    binary=y
309    ;;
310esac
311
312vmz="$tmpdir/`basename \"$kernel\"`.$ext"
313if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
314    ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
315
316    strip_size=$(stat -c %s $vmz.$$)
317
318    if [ -n "$gzip" ]; then
319        gzip -n -f -9 "$vmz.$$"
320    fi
321
322    if [ -n "$cacheit" ]; then
323	mv -f "$vmz.$$$gzip" "$vmz$gzip"
324    else
325	vmz="$vmz.$$"
326    fi
327else
328    # Calculate the vmlinux.strip size
329    ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
330    strip_size=$(stat -c %s $vmz.$$)
331    rm -f $vmz.$$
332fi
333
334if [ "$make_space" = "y" ]; then
335	# Round the size to next higher MB limit
336	round_size=$(((strip_size + 0xfffff) & 0xfff00000))
337
338	round_size=0x$(printf "%x" $round_size)
339	link_addr=$(printf "%d" $link_address)
340
341	if [ $link_addr -lt $strip_size ]; then
342	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
343			"overlaps the address of the wrapper($link_address)"
344	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
345	    link_address=$round_size
346	fi
347fi
348
349vmz="$vmz$gzip"
350
351# Extract kernel version information, some platforms want to include
352# it in the image header
353version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
354    cut -d' ' -f3`
355if [ -n "$version" ]; then
356    uboot_version="-n Linux-$version"
357fi
358
359# physical offset of kernel image
360membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
361
362case "$platform" in
363uboot)
364    rm -f "$ofile"
365    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
366	$uboot_version -d "$vmz" "$ofile"
367    if [ -z "$cacheit" ]; then
368	rm -f "$vmz"
369    fi
370    exit 0
371    ;;
372uboot-obs600)
373    rm -f "$ofile"
374    # obs600 wants a multi image with an initrd, so we need to put a fake
375    # one in even when building a "normal" image.
376    if [ -n "$initrd" ]; then
377	real_rd="$initrd"
378    else
379	real_rd=`mktemp`
380	echo "\0" >>"$real_rd"
381    fi
382    ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
383	$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
384    if [ -z "$initrd" ]; then
385	rm -f "$real_rd"
386    fi
387    if [ -z "$cacheit" ]; then
388	rm -f "$vmz"
389    fi
390    exit 0
391    ;;
392esac
393
394addsec() {
395    ${CROSS}objcopy $4 $1 \
396	--add-section=$3="$2" \
397	--set-section-flags=$3=contents,alloc,load,readonly,data
398}
399
400addsec $tmp "$vmz" $ksection $object/empty.o
401if [ -z "$cacheit" ]; then
402    rm -f "$vmz"
403fi
404
405if [ -n "$initrd" ]; then
406    addsec $tmp "$initrd" $isection
407fi
408
409if [ -n "$dtb" ]; then
410    addsec $tmp "$dtb" .kernel:dtb
411    if [ -n "$dts" ]; then
412	rm $dtb
413    fi
414fi
415
416if [ "$platform" != "miboot" ]; then
417    if [ -n "$link_address" ] ; then
418        text_start="-Ttext $link_address"
419    fi
420    ${CROSS}ld -m $format -T $lds $text_start $pie -o "$ofile" \
421	$platformo $tmp $object/wrapper.a
422    rm $tmp
423fi
424
425# Some platforms need the zImage's entry point and base address
426base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
427entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
428
429if [ -n "$binary" ]; then
430    mv "$ofile" "$ofile".elf
431    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
432fi
433
434# post-processing needed for some platforms
435case "$platform" in
436pseries|chrp|maple)
437    $objbin/addnote "$ofile"
438    ;;
439coff)
440    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
441    $objbin/hack-coff "$ofile"
442    ;;
443cuboot*)
444    gzip -n -f -9 "$ofile"
445    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
446            $uboot_version -d "$ofile".gz "$ofile"
447    ;;
448treeboot*)
449    mv "$ofile" "$ofile.elf"
450    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
451    if [ -z "$cacheit" ]; then
452	rm -f "$ofile.elf"
453    fi
454    exit 0
455    ;;
456ps3)
457    # The ps3's loader supports loading a gzipped binary image from flash
458    # rom to ram addr zero. The loader then enters the system reset
459    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
460    # a binary image of the kernel to be at addr zero, and yet have a
461    # suitable bootwrapper entry at 0x100.  To construct the final rom
462    # image 512 bytes from offset 0x100 is copied to the bootwrapper
463    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
464    # bootwrapper entry code at symbol __system_reset_overlay is then
465    # copied to offset 0x100.  At runtime the bootwrapper program copies
466    # the data at __system_reset_kernel back to addr 0x100.
467
468    system_reset_overlay=0x`${CROSS}nm "$ofile" \
469        | grep ' __system_reset_overlay$'       \
470        | cut -d' ' -f1`
471    system_reset_overlay=`printf "%d" $system_reset_overlay`
472    system_reset_kernel=0x`${CROSS}nm "$ofile" \
473        | grep ' __system_reset_kernel$'       \
474        | cut -d' ' -f1`
475    system_reset_kernel=`printf "%d" $system_reset_kernel`
476    overlay_dest="256"
477    overlay_size="512"
478
479    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
480
481    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
482        skip=$overlay_dest seek=$system_reset_kernel          \
483        count=$overlay_size bs=1
484
485    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
486        skip=$system_reset_overlay seek=$overlay_dest         \
487        count=$overlay_size bs=1
488
489    odir="$(dirname "$ofile.bin")"
490    rm -f "$odir/otheros.bld"
491    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
492    ;;
493esac
494