xref: /openbmc/linux/arch/powerpc/boot/wrapper (revision 7b73a9c8) 
1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0-only
3
4# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
5
6# This script takes a kernel binary and optionally an initrd image
7# and/or a device-tree blob, and creates a bootable zImage for a
8# given platform.
9
10# Options:
11# -o zImage	specify output file
12# -p platform	specify platform (links in $platform.o)
13# -i initrd	specify initrd file
14# -d devtree	specify device-tree blob
15# -s tree.dts	specify device-tree source file (needs dtc installed)
16# -e esm_blob   specify ESM blob for secure images
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=
41esm_blob=
42cacheit=
43binary=
44compression=.gz
45uboot_comp=gzip
46pie=
47format=
48
49# cross-compilation prefix
50CROSS=
51
52# mkimage wrapper script
53MKIMAGE=$srctree/scripts/mkuboot.sh
54
55# directory for object and other files used by this script
56object=arch/powerpc/boot
57objbin=$object
58dtc=scripts/dtc/dtc
59
60# directory for working files
61tmpdir=.
62
63usage() {
64    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
65    echo '       [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
66    echo '       [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
67    echo '       [-Z (gz|xz|none)] [--no-compression] [vmlinux]' >&2
68    exit 1
69}
70
71run_cmd() {
72    if [ "$V" = 1 ]; then
73        $* 2>&1
74    else
75        local msg
76
77        set +e
78        msg=$($* 2>&1)
79
80        if [ $? -ne "0" ]; then
81                echo $msg
82                exit 1
83        fi
84        set -e
85    fi
86}
87
88while [ "$#" -gt 0 ]; do
89    case "$1" in
90    -o)
91	shift
92	[ "$#" -gt 0 ] || usage
93	ofile="$1"
94	;;
95    -p)
96	shift
97	[ "$#" -gt 0 ] || usage
98	platform="$1"
99	;;
100    -i)
101	shift
102	[ "$#" -gt 0 ] || usage
103	initrd="$1"
104	;;
105    -d)
106	shift
107	[ "$#" -gt 0 ] || usage
108	dtb="$1"
109	;;
110    -e)
111	shift
112	[ "$#" -gt 0 ] || usage
113	esm_blob="$1"
114	;;
115    -s)
116	shift
117	[ "$#" -gt 0 ] || usage
118	dts="$1"
119	;;
120    -c)
121	cacheit=y
122	;;
123    -C)
124	shift
125	[ "$#" -gt 0 ] || usage
126	CROSS="$1"
127	;;
128    -D)
129	shift
130	[ "$#" -gt 0 ] || usage
131	object="$1"
132	objbin="$1"
133	;;
134    -W)
135	shift
136	[ "$#" -gt 0 ] || usage
137	tmpdir="$1"
138	;;
139    -z)
140	compression=.gz
141	uboot_comp=gzip
142	;;
143    -Z)
144	shift
145	[ "$#" -gt 0 ] || usage
146        [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage
147
148	compression=".$1"
149	uboot_comp=$1
150
151        if [ $compression = ".none" ]; then
152                compression=
153		uboot_comp=none
154        fi
155	if [ $uboot_comp = "gz" ]; then
156		uboot_comp=gzip
157	fi
158	;;
159    --no-gzip)
160        # a "feature" of the the wrapper script is that it can be used outside
161        # the kernel tree. So keeping this around for backwards compatibility.
162        compression=
163	uboot_comp=none
164        ;;
165    -?)
166	usage
167	;;
168    *)
169	[ -z "$kernel" ] || usage
170	kernel="$1"
171	;;
172    esac
173    shift
174done
175
176
177if [ -n "$dts" ]; then
178    if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
179	dts="$object/dts/$dts"
180    fi
181    if [ -z "$dtb" ]; then
182	dtb="$platform.dtb"
183    fi
184    $dtc -O dtb -o "$dtb" -b 0 "$dts"
185fi
186
187if [ -z "$kernel" ]; then
188    kernel=vmlinux
189fi
190
191LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
192case "$elfformat" in
193    elf64-powerpcle)	format=elf64lppc	;;
194    elf64-powerpc)	format=elf32ppc	;;
195    elf32-powerpc)	format=elf32ppc	;;
196esac
197
198ld_version()
199{
200    # Poached from scripts/ld-version.sh, but we don't want to call that because
201    # this script (wrapper) is distributed separately from the kernel source.
202    # Extract linker version number from stdin and turn into single number.
203    awk '{
204	gsub(".*\\)", "");
205	gsub(".*version ", "");
206	gsub("-.*", "");
207	split($1,a, ".");
208	print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
209	exit
210    }'
211}
212
213# Do not include PT_INTERP segment when linking pie. Non-pie linking
214# just ignores this option.
215LD_VERSION=$(${CROSS}ld --version | ld_version)
216LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
217if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
218	nodl="--no-dynamic-linker"
219fi
220
221platformo=$object/"$platform".o
222lds=$object/zImage.lds
223ext=strip
224objflags=-S
225tmp=$tmpdir/zImage.$$.o
226ksection=.kernel:vmlinux.strip
227isection=.kernel:initrd
228esection=.kernel:esm_blob
229link_address='0x400000'
230make_space=y
231
232
233if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
234    echo "ESM blob not support on non-pseries platforms" >&2
235    exit 1
236fi
237
238case "$platform" in
239of)
240    platformo="$object/of.o $object/epapr.o"
241    make_space=n
242    ;;
243pseries)
244    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
245    link_address='0x4000000'
246    if [ "$format" != "elf32ppc" ]; then
247	link_address=
248	pie=-pie
249    fi
250    make_space=n
251    ;;
252maple)
253    platformo="$object/of.o $object/epapr.o"
254    link_address='0x400000'
255    make_space=n
256    ;;
257pmac|chrp)
258    platformo="$object/of.o $object/epapr.o"
259    make_space=n
260    ;;
261coff)
262    platformo="$object/crt0.o $object/of.o $object/epapr.o"
263    lds=$object/zImage.coff.lds
264    link_address='0x500000'
265    make_space=n
266    pie=
267    ;;
268miboot|uboot*)
269    # miboot and U-boot want just the bare bits, not an ELF binary
270    ext=bin
271    objflags="-O binary"
272    tmp="$ofile"
273    ksection=image
274    isection=initrd
275    ;;
276cuboot*)
277    binary=y
278    compression=
279    case "$platform" in
280    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
281        platformo=$object/cuboot-8xx.o
282        ;;
283    *5200*|*-motionpro)
284        platformo=$object/cuboot-52xx.o
285        ;;
286    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
287        platformo=$object/cuboot-pq2.o
288        ;;
289    *-mpc824*)
290        platformo=$object/cuboot-824x.o
291        ;;
292    *-mpc83*|*-asp834x*)
293        platformo=$object/cuboot-83xx.o
294        ;;
295    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
296        platformo=$object/cuboot-85xx-cpm2.o
297        ;;
298    *-mpc85*|*-tqm85*|*-sbc85*)
299        platformo=$object/cuboot-85xx.o
300        ;;
301    *-amigaone)
302        link_address='0x800000'
303        ;;
304    esac
305    ;;
306ps3)
307    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
308    lds=$object/zImage.ps3.lds
309    compression=
310    ext=bin
311    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
312    ksection=.kernel:vmlinux.bin
313    isection=.kernel:initrd
314    link_address=''
315    make_space=n
316    pie=
317    ;;
318ep88xc|ep405|ep8248e)
319    platformo="$object/fixed-head.o $object/$platform.o"
320    binary=y
321    ;;
322adder875-redboot)
323    platformo="$object/fixed-head.o $object/redboot-8xx.o"
324    binary=y
325    ;;
326simpleboot-virtex405-*)
327    platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
328    binary=y
329    ;;
330simpleboot-virtex440-*)
331    platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
332    binary=y
333    ;;
334simpleboot-*)
335    platformo="$object/fixed-head.o $object/simpleboot.o"
336    binary=y
337    ;;
338asp834x-redboot)
339    platformo="$object/fixed-head.o $object/redboot-83xx.o"
340    binary=y
341    ;;
342xpedite52*)
343    link_address='0x1400000'
344    platformo=$object/cuboot-85xx.o
345    ;;
346gamecube|wii)
347    link_address='0x600000'
348    platformo="$object/$platform-head.o $object/$platform.o"
349    ;;
350treeboot-currituck)
351    link_address='0x1000000'
352    ;;
353treeboot-akebono)
354    link_address='0x1000000'
355    ;;
356treeboot-iss4xx-mpic)
357    platformo="$object/treeboot-iss4xx.o"
358    ;;
359epapr)
360    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
361    link_address='0x20000000'
362    pie=-pie
363    ;;
364mvme5100)
365    platformo="$object/fixed-head.o $object/mvme5100.o"
366    binary=y
367    ;;
368mvme7100)
369    platformo="$object/motload-head.o $object/mvme7100.o"
370    link_address='0x4000000'
371    binary=y
372    ;;
373esac
374
375vmz="$tmpdir/`basename \"$kernel\"`.$ext"
376
377# Calculate the vmlinux.strip size
378${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
379strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
380
381if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
382    # recompress the image if we need to
383    case $compression in
384    .xz)
385        xz --check=crc32 -f -6 "$vmz.$$"
386        ;;
387    .gz)
388        gzip -n -f -9 "$vmz.$$"
389        ;;
390    .lzma)
391        xz --format=lzma -f -6 "$vmz.$$"
392	;;
393    .lzo)
394        lzop -f -9 "$vmz.$$"
395	;;
396    *)
397        # drop the compression suffix so the stripped vmlinux is used
398        compression=
399	uboot_comp=none
400	;;
401    esac
402
403    if [ -n "$cacheit" ]; then
404	mv -f "$vmz.$$$compression" "$vmz$compression"
405    else
406	vmz="$vmz.$$"
407    fi
408else
409    rm -f $vmz.$$
410fi
411
412vmz="$vmz$compression"
413
414if [ "$make_space" = "y" ]; then
415	# Round the size to next higher MB limit
416	round_size=$(((strip_size + 0xfffff) & 0xfff00000))
417
418	round_size=0x$(printf "%x" $round_size)
419	link_addr=$(printf "%d" $link_address)
420
421	if [ $link_addr -lt $strip_size ]; then
422	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
423			"overlaps the address of the wrapper($link_address)"
424	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
425	    link_address=$round_size
426	fi
427fi
428
429# Extract kernel version information, some platforms want to include
430# it in the image header
431version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
432    cut -d' ' -f3`
433if [ -n "$version" ]; then
434    uboot_version="-n Linux-$version"
435fi
436
437# physical offset of kernel image
438membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
439
440case "$platform" in
441uboot)
442    rm -f "$ofile"
443    ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
444	$uboot_version -d "$vmz" "$ofile"
445    if [ -z "$cacheit" ]; then
446	rm -f "$vmz"
447    fi
448    exit 0
449    ;;
450uboot-obs600)
451    rm -f "$ofile"
452    # obs600 wants a multi image with an initrd, so we need to put a fake
453    # one in even when building a "normal" image.
454    if [ -n "$initrd" ]; then
455	real_rd="$initrd"
456    else
457	real_rd=`mktemp`
458	echo "\0" >>"$real_rd"
459    fi
460    ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
461	$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
462    if [ -z "$initrd" ]; then
463	rm -f "$real_rd"
464    fi
465    if [ -z "$cacheit" ]; then
466	rm -f "$vmz"
467    fi
468    exit 0
469    ;;
470esac
471
472addsec() {
473    ${CROSS}objcopy $4 $1 \
474	--add-section=$3="$2" \
475	--set-section-flags=$3=contents,alloc,load,readonly,data
476}
477
478addsec $tmp "$vmz" $ksection $object/empty.o
479if [ -z "$cacheit" ]; then
480    rm -f "$vmz"
481fi
482
483if [ -n "$initrd" ]; then
484    addsec $tmp "$initrd" $isection
485fi
486
487if [ -n "$dtb" ]; then
488    addsec $tmp "$dtb" .kernel:dtb
489    if [ -n "$dts" ]; then
490	rm $dtb
491    fi
492fi
493
494if [ -n "$esm_blob" ]; then
495    addsec $tmp "$esm_blob" $esection
496fi
497
498if [ "$platform" != "miboot" ]; then
499    if [ -n "$link_address" ] ; then
500        text_start="-Ttext $link_address"
501    fi
502#link everything
503    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl -o "$ofile" \
504	$platformo $tmp $object/wrapper.a
505    rm $tmp
506fi
507
508# Some platforms need the zImage's entry point and base address
509base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
510entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
511
512if [ -n "$binary" ]; then
513    mv "$ofile" "$ofile".elf
514    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
515fi
516
517# post-processing needed for some platforms
518case "$platform" in
519pseries|chrp|maple)
520    $objbin/addnote "$ofile"
521    ;;
522coff)
523    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
524    $objbin/hack-coff "$ofile"
525    ;;
526cuboot*)
527    gzip -n -f -9 "$ofile"
528    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
529            $uboot_version -d "$ofile".gz "$ofile"
530    ;;
531treeboot*)
532    mv "$ofile" "$ofile.elf"
533    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
534    if [ -z "$cacheit" ]; then
535	rm -f "$ofile.elf"
536    fi
537    exit 0
538    ;;
539ps3)
540    # The ps3's loader supports loading a gzipped binary image from flash
541    # rom to ram addr zero. The loader then enters the system reset
542    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
543    # a binary image of the kernel to be at addr zero, and yet have a
544    # suitable bootwrapper entry at 0x100.  To construct the final rom
545    # image 512 bytes from offset 0x100 is copied to the bootwrapper
546    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
547    # bootwrapper entry code at symbol __system_reset_overlay is then
548    # copied to offset 0x100.  At runtime the bootwrapper program copies
549    # the data at __system_reset_kernel back to addr 0x100.
550
551    system_reset_overlay=0x`${CROSS}nm "$ofile" \
552        | grep ' __system_reset_overlay$'       \
553        | cut -d' ' -f1`
554    system_reset_overlay=`printf "%d" $system_reset_overlay`
555    system_reset_kernel=0x`${CROSS}nm "$ofile" \
556        | grep ' __system_reset_kernel$'       \
557        | cut -d' ' -f1`
558    system_reset_kernel=`printf "%d" $system_reset_kernel`
559    overlay_dest="256"
560    overlay_size="512"
561
562    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
563
564    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
565        skip=$overlay_dest seek=$system_reset_kernel          \
566        count=$overlay_size bs=1
567
568    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
569        skip=$system_reset_overlay seek=$overlay_dest         \
570        count=$overlay_size bs=1
571
572    odir="$(dirname "$ofile.bin")"
573    rm -f "$odir/otheros.bld"
574    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
575    ;;
576esac
577