summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/boot/wrapper
blob: 65f685479175a354d357b087c5456b414492153c (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
#!/bin/sh

# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
# This program may be used under the terms of version 2 of the GNU
# General Public License.

# 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)
# -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 .)

# defaults
kernel=
ofile=zImage
platform=of
initrd=
dtb=
dts=
cacheit=
gzip=.gz

# cross-compilation prefix
CROSS=

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

# directory for working files
tmpdir=.

usage() {
    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
    echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
    echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
    exit 1
}

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="$1"
	;;
    -s)
	shift
	[ "$#" -gt 0 ] || usage
	dts="$1"
	;;
    -c)
	cacheit=y
	;;
    -C)
	shift
	[ "$#" -gt 0 ] || usage
	CROSS="$1"
	;;
    -D)
	shift
	[ "$#" -gt 0 ] || usage
	object="$1"
	;;
    -W)
	shift
	[ "$#" -gt 0 ] || usage
	tmpdir="$1"
	;;
    --no-gzip)
        gzip=
        ;;
    -?)
	usage
	;;
    *)
	[ -z "$kernel" ] || usage
	kernel="$1"
	;;
    esac
    shift
done

if [ -n "$dts" ]; then
    if [ -z "$dtb" ]; then
	dtb="$platform.dtb"
    fi
    dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts" || exit 1
fi

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

platformo=$object/"$platform".o
lds=$object/zImage.lds
ext=strip
objflags=-S
tmp=$tmpdir/zImage.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd

case "$platform" in
pmac|pseries|chrp)
    platformo=$object/of.o
    ;;
coff)
    platformo=$object/of.o
    lds=$object/zImage.coff.lds
    ;;
miboot|uboot)
    # miboot and U-boot want just the bare bits, not an ELF binary
    ext=bin
    objflags="-O binary"
    tmp="$ofile"
    ksection=image
    isection=initrd
    ;;
cuboot*)
    gzip=
    ;;
ps3)
    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
    lds=$object/zImage.ps3.lds
    gzip=
    ext=bin
    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
    ksection=.kernel:vmlinux.bin
    isection=.kernel:initrd
    ;;
esac

vmz="$tmpdir/`basename \"$kernel\"`.$ext"
if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
    ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"

    if [ -n "$gzip" ]; then
        gzip -f -9 "$vmz.$$"
    fi

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

vmz="$vmz$gzip"

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

case "$platform" in
uboot)
    rm -f "$ofile"
    mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
	$uboot_version -d "$vmz" "$ofile"
    if [ -z "$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 [ "$platform" != "miboot" ]; then
    ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
	$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`

# post-processing needed for some platforms
case "$platform" in
pseries|chrp)
    $object/addnote "$ofile"
    ;;
coff)
    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
    $object/hack-coff "$ofile"
    ;;
cuboot*)
    mv "$ofile" "$ofile".elf
    ${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin
    gzip -f -9 "$ofile".bin
    mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
            $uboot_version -d "$ofile".bin.gz "$ofile"
    ;;
treeboot*)
    mv "$ofile" "$ofile.elf"
    $object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
    if [ -z "$cacheit" ]; then
	rm -f "$ofile.elf"
    fi
    exit 0
    ;;
ps3)
    # The ps3's loader supports loading gzipped binary images from flash
    # rom to addr zero. The loader enters the image at addr 0x100.  A
    # bootwrapper overlay is use to arrange for the kernel to be loaded
    # to addr zero and to have a suitable bootwrapper entry at 0x100.
    # To construct the rom image, 0x100 bytes from offset 0x100 in the
    # kernel is copied to the bootwrapper symbol __system_reset_kernel.
    # The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
    # then copied to offset 0x100.  At runtime the bootwrapper program
    # copies the 0x100 bytes at __system_reset_kernel 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="256"

    rm -f "$object/otheros.bld"

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

    msg=$(dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
        skip=$overlay_dest seek=$system_reset_kernel      \
        count=$overlay_size bs=1 2>&1)

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

    msg=$(dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
        skip=$system_reset_overlay seek=$overlay_dest     \
        count=$overlay_size bs=1 2>&1)

    if [ $? -ne "0" ]; then
       echo $msg
       exit 2
    fi

    gzip --force -9 --stdout "$ofile.bin" > "$object/otheros.bld"
    ;;
esac
OpenPOWER on IntegriCloud