summaryrefslogtreecommitdiff
path: root/target/linux/brcm2708/patches-4.4/0049-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch
blob: 145348ae7b6d2c956bfa7b507195004038a2394a (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
From c5e1c42c941a7dbcb700d34b99e20e3f67725489 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 11 May 2015 09:00:42 +0100
Subject: [PATCH] scripts: Add mkknlimg and knlinfo scripts from tools repo

The Raspberry Pi firmware looks for a trailer on the kernel image to
determine whether it was compiled with Device Tree support enabled.
If the firmware finds a kernel without this trailer, or which has a
trailer indicating that it isn't DT-capable, it disables DT support
and reverts to using ATAGs.

The mkknlimg utility adds that trailer, having first analysed the
image to look for signs of DT support and the kernel version string.

knlinfo displays the contents of the trailer in the given kernel image.

scripts/mkknlimg: Add support for ARCH_BCM2835

Add a new trailer field indicating whether this is an ARCH_BCM2835
build, as opposed to MACH_BCM2708/9. If the loader finds this flag
is set it changes the default base dtb file name from bcm270x...
to bcm283y...

Also update knlinfo to show the status of the field.

scripts/mkknlimg: Improve ARCH_BCM2835 detection

The board support code contains sufficient strings to be able to
distinguish 2708 vs. 2835 builds, so remove the check for
bcm2835-pm-wdt which could exist in either.

Also, since the canned configuration is no longer built in (it's
a module), remove the config string checking.

See: https://github.com/raspberrypi/linux/issues/1157
---
 scripts/knlinfo  | 168 ++++++++++++++++++++++++++++++++++++++
 scripts/mkknlimg | 244 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 412 insertions(+)
 create mode 100755 scripts/knlinfo
 create mode 100755 scripts/mkknlimg

--- /dev/null
+++ b/scripts/knlinfo
@@ -0,0 +1,168 @@
+#!/usr/bin/env perl
+# ----------------------------------------------------------------------
+# knlinfo by Phil Elwell for Raspberry Pi
+#
+# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
+#
+# Licensed under the terms of the GNU General Public License.
+# ----------------------------------------------------------------------
+
+use strict;
+use integer;
+
+use Fcntl ":seek";
+
+my $trailer_magic = 'RPTL';
+
+my %atom_formats =
+(
+    'DTOK' => \&format_bool,
+    'KVer' => \&format_string,
+    '283x' => \&format_bool,
+);
+
+if (@ARGV != 1)
+{
+	print ("Usage: knlinfo <kernel image>\n");
+	exit(1);
+}
+
+my $kernel_file = $ARGV[0];
+
+
+my ($atoms, $pos) = read_trailer($kernel_file);
+
+exit(1) if (!$atoms);
+
+printf("Kernel trailer found at %d/0x%x:\n", $pos, $pos);
+
+foreach my $atom (@$atoms)
+{
+    printf("  %s: %s\n", $atom->[0], format_atom($atom));
+}
+
+exit(0);
+
+sub read_trailer
+{
+	my ($kernel_file) = @_;
+	my $fh;
+
+	if (!open($fh, '<', $kernel_file))
+	{
+		print ("* Failed to open '$kernel_file'\n");
+		return undef;
+	}
+
+	if (!seek($fh, -12, SEEK_END))
+	{
+		print ("* seek error in '$kernel_file'\n");
+		return undef;
+	}
+
+	my $last_bytes;
+	sysread($fh, $last_bytes, 12);
+
+	my ($trailer_len, $data_len, $magic) = unpack('VVa4', $last_bytes);
+
+	if (($magic ne $trailer_magic) || ($data_len != 4))
+	{
+		print ("* no trailer\n");
+		return undef;
+	}
+	if (!seek($fh, -12, SEEK_END))
+	{
+		print ("* seek error in '$kernel_file'\n");
+		return undef;
+	}
+
+	$trailer_len -= 12;
+
+	while ($trailer_len > 0)
+	{
+		if ($trailer_len < 8)
+		{
+			print ("* truncated atom header in trailer\n");
+			return undef;
+		}
+		if (!seek($fh, -8, SEEK_CUR))
+		{
+			print ("* seek error in '$kernel_file'\n");
+			return undef;
+		}
+		$trailer_len -= 8;
+
+		my $atom_hdr;
+		sysread($fh, $atom_hdr, 8);
+		my ($atom_len, $atom_type) = unpack('Va4', $atom_hdr);
+
+		if ($trailer_len < $atom_len)
+		{
+			print ("* truncated atom data in trailer\n");
+			return undef;
+		}
+
+		my $rounded_len = (($atom_len + 3) & ~3);
+		if (!seek($fh, -(8 + $rounded_len), SEEK_CUR))
+		{
+			print ("* seek error in '$kernel_file'\n");
+			return undef;
+		}
+		$trailer_len -= $rounded_len;
+
+		my $atom_data;
+		sysread($fh, $atom_data, $atom_len);
+
+		if (!seek($fh, -$atom_len, SEEK_CUR))
+		{
+			print ("* seek error in '$kernel_file'\n");
+			return undef;
+		}
+
+		push @$atoms, [ $atom_type, $atom_data ];
+	}
+
+ 	if (($$atoms[-1][0] eq "\x00\x00\x00\x00") &&
+	    ($$atoms[-1][1] eq ""))
+	{
+		pop @$atoms;
+	}
+	else
+	{
+		print ("* end marker missing from trailer\n");
+	}
+
+	return ($atoms, tell($fh));
+}
+
+sub format_atom
+{
+    my ($atom) = @_;
+
+    my $format_func = $atom_formats{$atom->[0]} || \&format_hex;
+    return $format_func->($atom->[1]);
+}
+
+sub format_bool
+{
+    my ($data) = @_;
+    return unpack('V', $data) ? 'true' : 'false';
+}
+
+sub format_int
+{
+    my ($data) = @_;
+    return unpack('V', $data);
+}
+
+sub format_string
+{
+    my ($data) = @_;
+    return '"'.$data.'"';
+}
+
+sub format_hex
+{
+    my ($data) = @_;
+    return unpack('H*', $data);
+}
--- /dev/null
+++ b/scripts/mkknlimg
@@ -0,0 +1,244 @@
+#!/usr/bin/env perl
+# ----------------------------------------------------------------------
+# mkknlimg by Phil Elwell for Raspberry Pi
+# based on extract-ikconfig by Dick Streefland
+#
+# (c) 2009,2010 Dick Streefland <dick@streefland.net>
+# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
+#
+# Licensed under the terms of the GNU General Public License.
+# ----------------------------------------------------------------------
+
+use strict;
+use warnings;
+use integer;
+
+my $trailer_magic = 'RPTL';
+
+my $tmpfile1 = "/tmp/mkknlimg_$$.1";
+my $tmpfile2 = "/tmp/mkknlimg_$$.2";
+
+my $dtok = 0;
+my $is_283x = 0;
+
+while (@ARGV && ($ARGV[0] =~ /^-/))
+{
+    my $arg = shift(@ARGV);
+    if ($arg eq '--dtok')
+    {
+	$dtok = 1;
+    }
+    elsif ($arg eq '--283x')
+    {
+	$is_283x = 1;
+    }
+    else
+    {
+	print ("* Unknown option '$arg'\n");
+	usage();
+    }
+}
+
+usage() if (@ARGV != 2);
+
+my $kernel_file = $ARGV[0];
+my $out_file = $ARGV[1];
+
+if (! -r $kernel_file)
+{
+    print ("* File '$kernel_file' not found\n");
+    usage();
+}
+
+my @wanted_strings =
+(
+	'bcm2708_fb',
+	'brcm,bcm2835-mmc',
+	'brcm,bcm2835-sdhost',
+	'brcm,bcm2708-pinctrl',
+	'brcm,bcm2835-gpio',
+	'brcm,bcm2835',
+	'brcm,bcm2836'
+);
+
+my $res = try_extract($kernel_file, $tmpfile1);
+$res = try_decompress('\037\213\010', 'xy',    'gunzip', 0,
+		      $kernel_file, $tmpfile1, $tmpfile2) if (!$res);
+$res = try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1,
+		      $kernel_file, $tmpfile1, $tmpfile2) if (!$res);
+$res = try_decompress('BZh',          'xy',    'bunzip2', 0,
+		      $kernel_file, $tmpfile1, $tmpfile2) if (!$res);
+$res = try_decompress('\135\0\0\0',   'xxx',   'unlzma', 0,
+		      $kernel_file, $tmpfile1, $tmpfile2) if (!$res);
+$res = try_decompress('\211\114\132', 'xy',    'lzop -d', 0,
+		      $kernel_file, $tmpfile1, $tmpfile2) if (!$res);
+$res = try_decompress('\002\041\114\030', 'xy',    'lz4 -d', 1,
+		      $kernel_file, $tmpfile1, $tmpfile2) if (!$res);
+
+my $append_trailer;
+my $trailer;
+my $kver = '?';
+
+$append_trailer = $dtok;
+
+if ($res)
+{
+    $kver = $res->{''} || '?';
+    print("Version: $kver\n");
+
+    $append_trailer = $dtok;
+    if (!$dtok)
+    {
+	if (config_bool($res, 'bcm2708_fb') ||
+	    config_bool($res, 'brcm,bcm2835-mmc') ||
+	    config_bool($res, 'brcm,bcm2835-sdhost'))
+	{
+	    $dtok ||= config_bool($res, 'brcm,bcm2708-pinctrl');
+	    $dtok ||= config_bool($res, 'brcm,bcm2835-gpio');
+	    $is_283x ||= config_bool($res, 'brcm,bcm2835');
+	    $is_283x ||= config_bool($res, 'brcm,bcm2836');
+	    $dtok ||= $is_283x;
+	    $append_trailer = 1;
+	}
+	else
+	{
+	    print ("* This doesn't look like a Raspberry Pi kernel. In pass-through mode.\n");
+	}
+    }
+}
+elsif (!$dtok)
+{
+    print ("* Is this a valid kernel? In pass-through mode.\n");
+}
+
+if ($append_trailer)
+{
+    printf("DT: %s\n", $dtok ? "y" : "n");
+    printf("283x: %s\n", $is_283x ? "y" : "n");
+
+    my @atoms;
+
+    push @atoms, [ $trailer_magic, pack('V', 0) ];
+    push @atoms, [ 'KVer', $kver ];
+    push @atoms, [ 'DTOK', pack('V', $dtok) ];
+    push @atoms, [ '283x', pack('V', $is_283x) ];
+
+    $trailer = pack_trailer(\@atoms);
+    $atoms[0]->[1] = pack('V', length($trailer));
+
+    $trailer = pack_trailer(\@atoms);
+}
+
+my $ofh;
+my $total_len = 0;
+
+if ($out_file eq $kernel_file)
+{
+    die "* Failed to open '$out_file' for append\n"
+	if (!open($ofh, '>>', $out_file));
+    $total_len = tell($ofh);
+}
+else
+{
+    die "* Failed to open '$kernel_file'\n"
+	if (!open(my $ifh, '<', $kernel_file));
+    die "* Failed to create '$out_file'\n"
+	if (!open($ofh, '>', $out_file));
+
+    my $copybuf;
+    while (1)
+    {
+	my $bytes = sysread($ifh, $copybuf, 64*1024);
+	last if (!$bytes);
+	syswrite($ofh, $copybuf, $bytes);
+	$total_len += $bytes;
+    }
+    close($ifh);
+}
+
+if ($trailer)
+{
+    # Pad to word-alignment
+    syswrite($ofh, "\x000\x000\x000", (-$total_len & 0x3));
+    syswrite($ofh, $trailer);
+}
+
+close($ofh);
+
+exit($trailer ? 0 : 1);
+
+END {
+	unlink($tmpfile1) if ($tmpfile1);
+	unlink($tmpfile2) if ($tmpfile2);
+}
+
+
+sub usage
+{
+	print ("Usage: mkknlimg [--dtok] [--283x] <vmlinux|zImage|bzImage> <outfile>\n");
+	exit(1);
+}
+
+sub try_extract
+{
+	my ($knl, $tmp) = @_;
+
+	my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
+
+	return undef if (!$ver);
+
+	chomp($ver);
+
+	my $res = { ''=>$ver };
+	my $string_pattern = '^('.join('|', @wanted_strings).')$';
+
+	my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
+	foreach my $match (@matches)
+	{
+	    chomp($match);
+	    $res->{$match} = 1;
+	}
+
+	return $res;
+}
+
+
+sub try_decompress
+{
+	my ($magic, $subst, $zcat, $idx, $knl, $tmp1, $tmp2) = @_;
+
+	my $pos = `tr "$magic\n$subst" "\n$subst=" < "$knl" | grep -abo "^$subst"`;
+	if ($pos)
+	{
+		chomp($pos);
+		$pos = (split(/[\r\n]+/, $pos))[$idx];
+		return undef if (!defined($pos));
+		$pos =~ s/:.*[\r\n]*$//s;
+		my $cmd = "tail -c+$pos \"$knl\" | $zcat > $tmp2 2> /dev/null";
+		my $err = (system($cmd) >> 8);
+		return undef if (($err != 0) && ($err != 2));
+
+		return try_extract($tmp2, $tmp1);
+	}
+
+	return undef;
+}
+
+sub pack_trailer
+{
+	my ($atoms) = @_;
+	my $trailer = pack('VV', 0, 0);
+	for (my $i = $#$atoms; $i>=0; $i--)
+	{
+		my $atom = $atoms->[$i];
+		$trailer .= pack('a*x!4Va4', $atom->[1], length($atom->[1]), $atom->[0]);
+	}
+	return $trailer;
+}
+
+sub config_bool
+{
+	my ($configs, $wanted) = @_;
+	my $val = $configs->{$wanted} || 'n';
+	return (($val eq 'y') || ($val eq '1'));
+}