xref: /openbmc/linux/arch/powerpc/boot/wrapper (revision c0c74acb) 
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 $kernel.strip.gz (use if present & newer, else make)
18# -C prefix	specify command prefix for cross-building tools
19#		(strip, objcopy, ld)
20# -D dir	specify directory containing data files used by script
21#		(default ./arch/powerpc/boot)
22# -W dir	specify working directory for temporary files (default .)
23# -z		use gzip (legacy)
24# -Z zsuffix    compression to use (gz, xz or none)
25
26# Stop execution if any command fails
27set -e
28
29# Allow for verbose output
30if [ "$V" = 1 ]; then
31    set -x
32fi
33
34# defaults
35kernel=
36ofile=zImage
37platform=of
38initrd=
39dtb=
40dts=
41cacheit=
42binary=
43compression=.gz
44pie=
45format=
46
47# cross-compilation prefix
48CROSS=
49
50# mkimage wrapper script
51MKIMAGE=$srctree/scripts/mkuboot.sh
52
53# directory for object and other files used by this script
54object=arch/powerpc/boot
55objbin=$object
56dtc=scripts/dtc/dtc
57
58# directory for working files
59tmpdir=.
60
61usage() {
62    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
63    echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
64    echo '       [-D datadir] [-W workingdir] [-Z (gz|xz|none)]' >&2
65    echo '       [--no-compression] [vmlinux]' >&2
66    exit 1
67}
68
69run_cmd() {
70    if [ "$V" = 1 ]; then
71        $* 2>&1
72    else
73        local msg
74
75        set +e
76        msg=$($* 2>&1)
77
78        if [ $? -ne "0" ]; then
79                echo $msg
80                exit 1
81        fi
82        set -e
83    fi
84}
85
86while [ "$#" -gt 0 ]; do
87    case "$1" in
88    -o)
89	shift
90	[ "$#" -gt 0 ] || usage
91	ofile="$1"
92	;;
93    -p)
94	shift
95	[ "$#" -gt 0 ] || usage
96	platform="$1"
97	;;
98    -i)
99	shift
100	[ "$#" -gt 0 ] || usage
101	initrd="$1"
102	;;
103    -d)
104	shift
105	[ "$#" -gt 0 ] || usage
106	dtb="$1"
107	;;
108    -s)
109	shift
110	[ "$#" -gt 0 ] || usage
111	dts="$1"
112	;;
113    -c)
114	cacheit=y
115	;;
116    -C)
117	shift
118	[ "$#" -gt 0 ] || usage
119	CROSS="$1"
120	;;
121    -D)
122	shift
123	[ "$#" -gt 0 ] || usage
124	object="$1"
125	objbin="$1"
126	;;
127    -W)
128	shift
129	[ "$#" -gt 0 ] || usage
130	tmpdir="$1"
131	;;
132    -z)
133	compression=.gz
134	;;
135    -Z)
136	shift
137	[ "$#" -gt 0 ] || usage
138        [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "none" ] || usage
139
140	compression=".$1"
141
142        if [ $compression = ".none" ]; then
143                compression=
144        fi
145	;;
146    --no-gzip)
147        # a "feature" of the the wrapper script is that it can be used outside
148        # the kernel tree. So keeping this around for backwards compatibility.
149        compression=
150        ;;
151    -?)
152	usage
153	;;
154    *)
155	[ -z "$kernel" ] || usage
156	kernel="$1"
157	;;
158    esac
159    shift
160done
161
162
163if [ -n "$dts" ]; then
164    if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
165	dts="$object/dts/$dts"
166    fi
167    if [ -z "$dtb" ]; then
168	dtb="$platform.dtb"
169    fi
170    $dtc -O dtb -o "$dtb" -b 0 "$dts"
171fi
172
173if [ -z "$kernel" ]; then
174    kernel=vmlinux
175fi
176
177LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
178case "$elfformat" in
179    elf64-powerpcle)	format=elf64lppc	;;
180    elf64-powerpc)	format=elf32ppc	;;
181    elf32-powerpc)	format=elf32ppc	;;
182esac
183
184ld_version()
185{
186    # Poached from scripts/ld-version.sh, but we don't want to call that because
187    # this script (wrapper) is distributed separately from the kernel source.
188    # Extract linker version number from stdin and turn into single number.
189    awk '{
190	gsub(".*\\)", "");
191	gsub(".*version ", "");
192	gsub("-.*", "");
193	split($1,a, ".");
194	print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
195	exit
196    }'
197}
198
199# Do not include PT_INTERP segment when linking pie. Non-pie linking
200# just ignores this option.
201LD_VERSION=$(${CROSS}ld --version | ld_version)
202LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
203if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
204	nodl="--no-dynamic-linker"
205fi
206
207platformo=$object/"$platform".o
208lds=$object/zImage.lds
209ext=strip
210objflags=-S
211tmp=$tmpdir/zImage.$$.o
212ksection=.kernel:vmlinux.strip
213isection=.kernel:initrd
214link_address='0x400000'
215make_space=y
216
217case "$platform" in
218of)
219    platformo="$object/of.o $object/epapr.o"
220    make_space=n
221    ;;
222pseries)
223    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
224    link_address='0x4000000'
225    if [ "$format" != "elf32ppc" ]; then
226	link_address=
227	pie=-pie
228    fi
229    make_space=n
230    ;;
231maple)
232    platformo="$object/of.o $object/epapr.o"
233    link_address='0x400000'
234    make_space=n
235    ;;
236pmac|chrp)
237    platformo="$object/of.o $object/epapr.o"
238    make_space=n
239    ;;
240coff)
241    platformo="$object/crt0.o $object/of.o $object/epapr.o"
242    lds=$object/zImage.coff.lds
243    link_address='0x500000'
244    make_space=n
245    pie=
246    ;;
247miboot|uboot*)
248    # miboot and U-boot want just the bare bits, not an ELF binary
249    ext=bin
250    objflags="-O binary"
251    tmp="$ofile"
252    ksection=image
253    isection=initrd
254    ;;
255cuboot*)
256    binary=y
257    compression=
258    case "$platform" in
259    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
260        platformo=$object/cuboot-8xx.o
261        ;;
262    *5200*|*-motionpro)
263        platformo=$object/cuboot-52xx.o
264        ;;
265    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
266        platformo=$object/cuboot-pq2.o
267        ;;
268    *-mpc824*)
269        platformo=$object/cuboot-824x.o
270        ;;
271    *-mpc83*|*-asp834x*)
272        platformo=$object/cuboot-83xx.o
273        ;;
274    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
275        platformo=$object/cuboot-85xx-cpm2.o
276        ;;
277    *-mpc85*|*-tqm85*|*-sbc85*)
278        platformo=$object/cuboot-85xx.o
279        ;;
280    *-amigaone)
281        link_address='0x800000'
282        ;;
283    esac
284    ;;
285ps3)
286    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
287    lds=$object/zImage.ps3.lds
288    compression=
289    ext=bin
290    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
291    ksection=.kernel:vmlinux.bin
292    isection=.kernel:initrd
293    link_address=''
294    make_space=n
295    pie=
296    ;;
297ep88xc|ep405|ep8248e)
298    platformo="$object/fixed-head.o $object/$platform.o"
299    binary=y
300    ;;
301adder875-redboot)
302    platformo="$object/fixed-head.o $object/redboot-8xx.o"
303    binary=y
304    ;;
305simpleboot-virtex405-*)
306    platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
307    binary=y
308    ;;
309simpleboot-virtex440-*)
310    platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
311    binary=y
312    ;;
313simpleboot-*)
314    platformo="$object/fixed-head.o $object/simpleboot.o"
315    binary=y
316    ;;
317asp834x-redboot)
318    platformo="$object/fixed-head.o $object/redboot-83xx.o"
319    binary=y
320    ;;
321xpedite52*)
322    link_address='0x1400000'
323    platformo=$object/cuboot-85xx.o
324    ;;
325gamecube|wii)
326    link_address='0x600000'
327    platformo="$object/$platform-head.o $object/$platform.o"
328    ;;
329treeboot-currituck)
330    link_address='0x1000000'
331    ;;
332treeboot-akebono)
333    link_address='0x1000000'
334    ;;
335treeboot-iss4xx-mpic)
336    platformo="$object/treeboot-iss4xx.o"
337    ;;
338epapr)
339    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
340    link_address='0x20000000'
341    pie=-pie
342    ;;
343mvme5100)
344    platformo="$object/fixed-head.o $object/mvme5100.o"
345    binary=y
346    ;;
347mvme7100)
348    platformo="$object/motload-head.o $object/mvme7100.o"
349    link_address='0x4000000'
350    binary=y
351    ;;
352esac
353
354vmz="$tmpdir/`basename \"$kernel\"`.$ext"
355
356# Calculate the vmlinux.strip size
357${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
358strip_size=$(stat -c %s $vmz.$$)
359
360if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
361    # recompress the image if we need to
362    case $compression in
363    .xz)
364        xz --check=crc32 -f -6 "$vmz.$$"
365        ;;
366    .gz)
367        gzip -n -f -9 "$vmz.$$"
368        ;;
369    *)
370        # drop the compression suffix so the stripped vmlinux is used
371        compression=
372	;;
373    esac
374
375    if [ -n "$cacheit" ]; then
376	mv -f "$vmz.$$$compression" "$vmz$compression"
377    else
378	vmz="$vmz.$$"
379    fi
380else
381    rm -f $vmz.$$
382fi
383
384vmz="$vmz$compression"
385
386if [ "$make_space" = "y" ]; then
387	# Round the size to next higher MB limit
388	round_size=$(((strip_size + 0xfffff) & 0xfff00000))
389
390	round_size=0x$(printf "%x" $round_size)
391	link_addr=$(printf "%d" $link_address)
392
393	if [ $link_addr -lt $strip_size ]; then
394	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
395			"overlaps the address of the wrapper($link_address)"
396	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
397	    link_address=$round_size
398	fi
399fi
400
401# Extract kernel version information, some platforms want to include
402# it in the image header
403version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
404    cut -d' ' -f3`
405if [ -n "$version" ]; then
406    uboot_version="-n Linux-$version"
407fi
408
409# physical offset of kernel image
410membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
411
412case "$platform" in
413uboot)
414    rm -f "$ofile"
415    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
416	$uboot_version -d "$vmz" "$ofile"
417    if [ -z "$cacheit" ]; then
418	rm -f "$vmz"
419    fi
420    exit 0
421    ;;
422uboot-obs600)
423    rm -f "$ofile"
424    # obs600 wants a multi image with an initrd, so we need to put a fake
425    # one in even when building a "normal" image.
426    if [ -n "$initrd" ]; then
427	real_rd="$initrd"
428    else
429	real_rd=`mktemp`
430	echo "\0" >>"$real_rd"
431    fi
432    ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
433	$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
434    if [ -z "$initrd" ]; then
435	rm -f "$real_rd"
436    fi
437    if [ -z "$cacheit" ]; then
438	rm -f "$vmz"
439    fi
440    exit 0
441    ;;
442esac
443
444addsec() {
445    ${CROSS}objcopy $4 $1 \
446	--add-section=$3="$2" \
447	--set-section-flags=$3=contents,alloc,load,readonly,data
448}
449
450addsec $tmp "$vmz" $ksection $object/empty.o
451if [ -z "$cacheit" ]; then
452    rm -f "$vmz"
453fi
454
455if [ -n "$initrd" ]; then
456    addsec $tmp "$initrd" $isection
457fi
458
459if [ -n "$dtb" ]; then
460    addsec $tmp "$dtb" .kernel:dtb
461    if [ -n "$dts" ]; then
462	rm $dtb
463    fi
464fi
465
466if [ "$platform" != "miboot" ]; then
467    if [ -n "$link_address" ] ; then
468        text_start="-Ttext $link_address"
469    fi
470#link everything
471    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl -o "$ofile" \
472	$platformo $tmp $object/wrapper.a
473    rm $tmp
474fi
475
476# Some platforms need the zImage's entry point and base address
477base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
478entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
479
480if [ -n "$binary" ]; then
481    mv "$ofile" "$ofile".elf
482    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
483fi
484
485# post-processing needed for some platforms
486case "$platform" in
487pseries|chrp|maple)
488    $objbin/addnote "$ofile"
489    ;;
490coff)
491    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
492    $objbin/hack-coff "$ofile"
493    ;;
494cuboot*)
495    gzip -n -f -9 "$ofile"
496    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
497            $uboot_version -d "$ofile".gz "$ofile"
498    ;;
499treeboot*)
500    mv "$ofile" "$ofile.elf"
501    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
502    if [ -z "$cacheit" ]; then
503	rm -f "$ofile.elf"
504    fi
505    exit 0
506    ;;
507ps3)
508    # The ps3's loader supports loading a gzipped binary image from flash
509    # rom to ram addr zero. The loader then enters the system reset
510    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
511    # a binary image of the kernel to be at addr zero, and yet have a
512    # suitable bootwrapper entry at 0x100.  To construct the final rom
513    # image 512 bytes from offset 0x100 is copied to the bootwrapper
514    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
515    # bootwrapper entry code at symbol __system_reset_overlay is then
516    # copied to offset 0x100.  At runtime the bootwrapper program copies
517    # the data at __system_reset_kernel back to addr 0x100.
518
519    system_reset_overlay=0x`${CROSS}nm "$ofile" \
520        | grep ' __system_reset_overlay$'       \
521        | cut -d' ' -f1`
522    system_reset_overlay=`printf "%d" $system_reset_overlay`
523    system_reset_kernel=0x`${CROSS}nm "$ofile" \
524        | grep ' __system_reset_kernel$'       \
525        | cut -d' ' -f1`
526    system_reset_kernel=`printf "%d" $system_reset_kernel`
527    overlay_dest="256"
528    overlay_size="512"
529
530    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
531
532    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
533        skip=$overlay_dest seek=$system_reset_kernel          \
534        count=$overlay_size bs=1
535
536    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
537        skip=$system_reset_overlay seek=$overlay_dest         \
538        count=$overlay_size bs=1
539
540    odir="$(dirname "$ofile.bin")"
541    rm -f "$odir/otheros.bld"
542    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
543    ;;
544esac
545