summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/boot/wrapper
blob: af04cea82b941f8174e5e9a5c7fb01e4b9ac55b9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only

# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>

# This script takes a kernel binary and optionally an initrd image
# and/or a device-tree blob, and creates a bootable zImage for a
# given platform.

# Options:
# -o zImage	specify output file
# -p platform	specify platform (links in $platform.o)
# -i initrd	specify initrd file
# -d devtree	specify device-tree blob
# -s tree.dts	specify device-tree source file (needs dtc installed)
# -e esm_blob   specify ESM blob for secure images
# -c		cache $kernel.strip.gz (use if present & newer, else make)
# -C prefix	specify command prefix for cross-building tools
#		(strip, objcopy, ld)
# -D dir	specify directory containing data files used by script
#		(default ./arch/powerpc/boot)
# -W dir	specify working directory for temporary files (default .)
# -z		use gzip (legacy)
# -Z zsuffix    compression to use (gz, xz or none)

# Stop execution if any command fails
set -e

export LC_ALL=C

# Allow for verbose output
if [ "$V" = 1 ]; then
    set -x
    map="-Map wrapper.map"
fi

# defaults
kernel=
ofile=zImage
platform=of
initrd=
dtb=
dts=
esm_blob=
cacheit=
binary=
compression=.gz
uboot_comp=gzip
pie=
format=
notext=
rodynamic=

# cross-compilation prefix
CROSS=

# mkimage wrapper script
MKIMAGE=$srctree/scripts/mkuboot.sh

# directory for object and other files used by this script
object=arch/powerpc/boot
objbin=$object
dtc=scripts/dtc/dtc

# directory for working files
tmpdir=.

usage() {
    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
    echo '       [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
    echo '       [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
    echo '       [-Z (gz|xz|none)] [--no-compression] [vmlinux]' >&2
    exit 1
}

run_cmd() {
    if [ "$V" = 1 ]; then
        $* 2>&1
    else
        local msg

        set +e
        msg=$($* 2>&1)

        if [ $? -ne "0" ]; then
                echo $msg
                exit 1
        fi
        set -e
    fi
}

while [ "$#" -gt 0 ]; do
    case "$1" in
    -o)
	shift
	[ "$#" -gt 0 ] || usage
	ofile="$1"
	;;
    -p)
	shift
	[ "$#" -gt 0 ] || usage
	platform="$1"
	;;
    -i)
	shift
	[ "$#" -gt 0 ] || usage
	initrd="$1"
	;;
    -d)
	shift
	[ "$#" -gt 0 ] || usage
	dtb="$1"
	;;
    -e)
	shift
	[ "$#" -gt 0 ] || usage
	esm_blob="$1"
	;;
    -s)
	shift
	[ "$#" -gt 0 ] || usage
	dts="$1"
	;;
    -c)
	cacheit=y
	;;
    -C)
	shift
	[ "$#" -gt 0 ] || usage
	CROSS="$1"
	;;
    -D)
	shift
	[ "$#" -gt 0 ] || usage
	object="$1"
	objbin="$1"
	;;
    -W)
	shift
	[ "$#" -gt 0 ] || usage
	tmpdir="$1"
	;;
    -z)
	compression=.gz
	uboot_comp=gzip
	;;
    -Z)
	shift
	[ "$#" -gt 0 ] || usage
        [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage

	compression=".$1"
	uboot_comp=$1

        if [ $compression = ".none" ]; then
                compression=
		uboot_comp=none
        fi
	if [ $uboot_comp = "gz" ]; then
		uboot_comp=gzip
	fi
	;;
    --no-gzip)
        # a "feature" of the wrapper script is that it can be used outside
        # the kernel tree. So keeping this around for backwards compatibility.
        compression=
	uboot_comp=none
        ;;
    -?)
	usage
	;;
    *)
	[ -z "$kernel" ] || usage
	kernel="$1"
	;;
    esac
    shift
done


if [ -n "$dts" ]; then
    if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
	dts="$object/dts/$dts"
    fi
    if [ -z "$dtb" ]; then
	dtb="$platform.dtb"
    fi
    $dtc -O dtb -o "$dtb" -b 0 "$dts"
fi

if [ -z "$kernel" ]; then
    kernel=vmlinux
fi

LC_ALL=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
case "$elfformat" in
    elf64-powerpcle)	format=elf64lppc	;;
    elf64-powerpc)	format=elf32ppc	;;
    elf32-powerpc)	format=elf32ppc	;;
esac

ld_version()
{
    # Poached from scripts/ld-version.sh, but we don't want to call that because
    # this script (wrapper) is distributed separately from the kernel source.
    # Extract linker version number from stdin and turn into single number.
    awk '{
	gsub(".*\\)", "");
	gsub(".*version ", "");
	gsub("-.*", "");
	split($1,a, ".");
	print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
	exit
    }'
}

ld_is_lld()
{
	${CROSS}ld -V 2>&1 | grep -q LLD
}

# Do not include PT_INTERP segment when linking pie. Non-pie linking
# just ignores this option.
LD_VERSION=$(${CROSS}ld --version | ld_version)
LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
	nodl="--no-dynamic-linker"
fi

# suppress some warnings in recent ld versions
nowarn="-z noexecstack"
if ! ld_is_lld; then
	if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
		nowarn="$nowarn --no-warn-rwx-segments"
	fi
fi

platformo=$object/"$platform".o
lds=$object/zImage.lds
ext=strip
objflags=-S
tmp=$tmpdir/zImage.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd
esection=.kernel:esm_blob
link_address='0x400000'
make_space=y


if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
    echo "ESM blob not support on non-pseries platforms" >&2
    exit 1
fi

case "$platform" in
of)
    platformo="$object/of.o $object/epapr.o"
    make_space=n
    ;;
pseries)
    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
    link_address='0x4000000'
    if [ "$format" != "elf32ppc" ]; then
	link_address=
	pie=-pie
    fi
    make_space=n
    ;;
maple)
    platformo="$object/of.o $object/epapr.o"
    link_address='0x400000'
    make_space=n
    ;;
pmac|chrp)
    platformo="$object/of.o $object/epapr.o"
    make_space=n
    ;;
coff)
    platformo="$object/crt0.o $object/of.o $object/epapr.o"
    lds=$object/zImage.coff.lds
    link_address='0x500000'
    make_space=n
    pie=
    ;;
miboot|uboot*)
    # miboot and U-boot want just the bare bits, not an ELF binary
    ext=bin
    objflags="-O binary"
    tmp="$ofile"
    ksection=image
    isection=initrd
    ;;
cuboot*)
    binary=y
    compression=
    case "$platform" in
    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
        platformo=$object/cuboot-8xx.o
        ;;
    *5200*|*-motionpro)
        platformo=$object/cuboot-52xx.o
        ;;
    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
        platformo=$object/cuboot-pq2.o
        ;;
    *-mpc824*)
        platformo=$object/cuboot-824x.o
        ;;
    *-mpc83*|*-asp834x*)
        platformo=$object/cuboot-83xx.o
        ;;
    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
        platformo=$object/cuboot-85xx-cpm2.o
        ;;
    *-mpc85*|*-tqm85*)
        platformo=$object/cuboot-85xx.o
        ;;
    *-amigaone)
        link_address='0x800000'
        ;;
    esac
    ;;
ps3)
    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
    lds=$object/zImage.ps3.lds
    compression=
    ext=bin
    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
    ksection=.kernel:vmlinux.bin
    isection=.kernel:initrd
    link_address=''
    make_space=n
    pie=
    ;;
ep88xc|ep405|ep8248e)
    platformo="$object/fixed-head.o $object/$platform.o"
    binary=y
    ;;
adder875-redboot)
    platformo="$object/fixed-head.o $object/redboot-8xx.o"
    binary=y
    ;;
simpleboot-*)
    platformo="$object/fixed-head.o $object/simpleboot.o"
    binary=y
    ;;
asp834x-redboot)
    platformo="$object/fixed-head.o $object/redboot-83xx.o"
    binary=y
    ;;
xpedite52*)
    link_address='0x1400000'
    platformo=$object/cuboot-85xx.o
    ;;
gamecube|wii)
    link_address='0x600000'
    platformo="$object/$platform-head.o $object/$platform.o"
    ;;
microwatt)
    link_address='0x500000'
    platformo="$object/fixed-head.o $object/$platform.o"
    binary=y
    ;;
treeboot-currituck)
    link_address='0x1000000'
    ;;
treeboot-akebono)
    link_address='0x1000000'
    ;;
treeboot-iss4xx-mpic)
    platformo="$object/treeboot-iss4xx.o"
    ;;
epapr)
    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
    link_address='0x20000000'
    pie=-pie
    notext='-z notext'
    rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
    ;;
mvme5100)
    platformo="$object/fixed-head.o $object/mvme5100.o"
    binary=y
    ;;
mvme7100)
    platformo="$object/motload-head.o $object/mvme7100.o"
    link_address='0x4000000'
    binary=y
    ;;
esac

vmz="$tmpdir/`basename \"$kernel\"`.$ext"

# Calculate the vmlinux.strip size
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")

if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
    # recompress the image if we need to
    case $compression in
    .xz)
        xz --check=crc32 -f -6 "$vmz.$$"
        ;;
    .gz)
        gzip -n -f -9 "$vmz.$$"
        ;;
    .lzma)
        xz --format=lzma -f -6 "$vmz.$$"
	;;
    .lzo)
        lzop -f -9 "$vmz.$$"
	;;
    *)
        # drop the compression suffix so the stripped vmlinux is used
        compression=
	uboot_comp=none
	;;
    esac

    if [ -n "$cacheit" ]; then
	mv -f "$vmz.$$$compression" "$vmz$compression"
    else
	vmz="$vmz.$$"
    fi
else
    rm -f $vmz.$$
fi

vmz="$vmz$compression"

if [ "$make_space" = "y" ]; then
	# Round the size to next higher MB limit
	round_size=$(((strip_size + 0xfffff) & 0xfff00000))

	round_size=0x$(printf "%x" $round_size)
	link_addr=$(printf "%d" $link_address)

	if [ $link_addr -lt $strip_size ]; then
	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
			"overlaps the address of the wrapper($link_address)"
	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
	    link_address=$round_size
	fi
fi

# Extract kernel version information, some platforms want to include
# it in the image header
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
    head -n1 | cut -d' ' -f3`
if [ -n "$version" ]; then
    uboot_version="-n Linux-$version"
fi

# physical offset of kernel image
membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`

case "$platform" in
uboot)
    rm -f "$ofile"
    ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
	$uboot_version -d "$vmz" "$ofile"
    if [ -z "$cacheit" ]; then
	rm -f "$vmz"
    fi
    exit 0
    ;;
uboot-obs600)
    rm -f "$ofile"
    # obs600 wants a multi image with an initrd, so we need to put a fake
    # one in even when building a "normal" image.
    if [ -n "$initrd" ]; then
	real_rd="$initrd"
    else
	real_rd=`mktemp`
	echo "\0" >>"$real_rd"
    fi
    ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
	$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
    if [ -z "$initrd" ]; then
	rm -f "$real_rd"
    fi
    if [ -z "$cacheit" ]; then
	rm -f "$vmz"
    fi
    exit 0
    ;;
esac

addsec() {
    ${CROSS}objcopy $4 $1 \
	--add-section=$3="$2" \
	--set-section-flags=$3=contents,alloc,load,readonly,data
}

addsec $tmp "$vmz" $ksection $object/empty.o
if [ -z "$cacheit" ]; then
    rm -f "$vmz"
fi

if [ -n "$initrd" ]; then
    addsec $tmp "$initrd" $isection
fi

if [ -n "$dtb" ]; then
    addsec $tmp "$dtb" .kernel:dtb
    if [ -n "$dts" ]; then
	rm $dtb
    fi
fi

if [ -n "$esm_blob" ]; then
    addsec $tmp "$esm_blob" $esection
fi

if [ "$platform" != "miboot" ]; then
    if [ -n "$link_address" ] ; then
        text_start="-Ttext $link_address"
    fi
#link everything
    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
	$platformo $tmp $object/wrapper.a
    rm $tmp
fi

# Some platforms need the zImage's entry point and base address
base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`

if [ -n "$binary" ]; then
    mv "$ofile" "$ofile".elf
    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
fi

# post-processing needed for some platforms
case "$platform" in
pseries|chrp|maple)
    $objbin/addnote "$ofile"
    ;;
coff)
    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
    $objbin/hack-coff "$ofile"
    ;;
cuboot*)
    gzip -n -f -9 "$ofile"
    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
            $uboot_version -d "$ofile".gz "$ofile"
    ;;
treeboot*)
    mv "$ofile" "$ofile.elf"
    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
    if [ -z "$cacheit" ]; then
	rm -f "$ofile.elf"
    fi
    exit 0
    ;;
ps3)
    # The ps3's loader supports loading a gzipped binary image from flash
    # rom to ram addr zero. The loader then enters the system reset
    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
    # a binary image of the kernel to be at addr zero, and yet have a
    # suitable bootwrapper entry at 0x100.  To construct the final rom
    # image 512 bytes from offset 0x100 is copied to the bootwrapper
    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
    # bootwrapper entry code at symbol __system_reset_overlay is then
    # copied to offset 0x100.  At runtime the bootwrapper program copies
    # the data at __system_reset_kernel back to addr 0x100.

    system_reset_overlay=0x`${CROSS}nm "$ofile" \
        | grep ' __system_reset_overlay$'       \
        | cut -d' ' -f1`
    system_reset_overlay=`printf "%d" $system_reset_overlay`
    system_reset_kernel=0x`${CROSS}nm "$ofile" \
        | grep ' __system_reset_kernel$'       \
        | cut -d' ' -f1`
    system_reset_kernel=`printf "%d" $system_reset_kernel`
    overlay_dest="256"
    overlay_size="512"

    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"

    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
        skip=$overlay_dest seek=$system_reset_kernel          \
        count=$overlay_size bs=1

    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
        skip=$system_reset_overlay seek=$overlay_dest         \
        count=$overlay_size bs=1

    odir="$(dirname "$ofile.bin")"

    # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
    # image.  If a compressed image that exceeded this limit is written to
    # flash the loader will decompress that image until the 16 MiB limit is
    # reached, then enter the system reset vector of the partially decompressed
    # image.  No warning is issued.
    rm -f "$odir"/{otheros,otheros-too-big}.bld
    size=$(${CROSS}nm --no-sort --radix=d "$ofile" | grep -E ' _end$' | cut -d' ' -f1)
    bld="otheros.bld"
    if [ $size -gt $((0x1000000)) ]; then
        bld="otheros-too-big.bld"
    fi
    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
    ;;
esac