Root/
Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 12 years 9 months ago. By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing | |
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1 | #!/usr/bin/perl -w |
2 | # |
3 | # Copyright 2005-2009 - Steven Rostedt |
4 | # Licensed under the terms of the GNU GPL License version 2 |
5 | # |
6 | # It's simple enough to figure out how this works. |
7 | # If not, then you can ask me at stripconfig@goodmis.org |
8 | # |
9 | # What it does? |
10 | # |
11 | # If you have installed a Linux kernel from a distribution |
12 | # that turns on way too many modules than you need, and |
13 | # you only want the modules you use, then this program |
14 | # is perfect for you. |
15 | # |
16 | # It gives you the ability to turn off all the modules that are |
17 | # not loaded on your system. |
18 | # |
19 | # Howto: |
20 | # |
21 | # 1. Boot up the kernel that you want to stream line the config on. |
22 | # 2. Change directory to the directory holding the source of the |
23 | # kernel that you just booted. |
24 | # 3. Copy the configuraton file to this directory as .config |
25 | # 4. Have all your devices that you need modules for connected and |
26 | # operational (make sure that their corresponding modules are loaded) |
27 | # 5. Run this script redirecting the output to some other file |
28 | # like config_strip. |
29 | # 6. Back up your old config (if you want too). |
30 | # 7. copy the config_strip file to .config |
31 | # 8. Run "make oldconfig" |
32 | # |
33 | # Now your kernel is ready to be built with only the modules that |
34 | # are loaded. |
35 | # |
36 | # Here's what I did with my Debian distribution. |
37 | # |
38 | # cd /usr/src/linux-2.6.10 |
39 | # cp /boot/config-2.6.10-1-686-smp .config |
40 | # ~/bin/streamline_config > config_strip |
41 | # mv .config config_sav |
42 | # mv config_strip .config |
43 | # make oldconfig |
44 | # |
45 | use strict; |
46 | use Getopt::Long; |
47 | |
48 | # set the environment variable LOCALMODCONFIG_DEBUG to get |
49 | # debug output. |
50 | my $debugprint = 0; |
51 | $debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG})); |
52 | |
53 | sub dprint { |
54 | return if (!$debugprint); |
55 | print STDERR @_; |
56 | } |
57 | |
58 | my $config = ".config"; |
59 | |
60 | my $uname = `uname -r`; |
61 | chomp $uname; |
62 | |
63 | my @searchconfigs = ( |
64 | { |
65 | "file" => ".config", |
66 | "exec" => "cat", |
67 | }, |
68 | { |
69 | "file" => "/proc/config.gz", |
70 | "exec" => "zcat", |
71 | }, |
72 | { |
73 | "file" => "/boot/config-$uname", |
74 | "exec" => "cat", |
75 | }, |
76 | { |
77 | "file" => "/boot/vmlinuz-$uname", |
78 | "exec" => "scripts/extract-ikconfig", |
79 | "test" => "scripts/extract-ikconfig", |
80 | }, |
81 | { |
82 | "file" => "vmlinux", |
83 | "exec" => "scripts/extract-ikconfig", |
84 | "test" => "scripts/extract-ikconfig", |
85 | }, |
86 | { |
87 | "file" => "/lib/modules/$uname/kernel/kernel/configs.ko", |
88 | "exec" => "scripts/extract-ikconfig", |
89 | "test" => "scripts/extract-ikconfig", |
90 | }, |
91 | { |
92 | "file" => "kernel/configs.ko", |
93 | "exec" => "scripts/extract-ikconfig", |
94 | "test" => "scripts/extract-ikconfig", |
95 | }, |
96 | { |
97 | "file" => "kernel/configs.o", |
98 | "exec" => "scripts/extract-ikconfig", |
99 | "test" => "scripts/extract-ikconfig", |
100 | }, |
101 | ); |
102 | |
103 | sub find_config { |
104 | foreach my $conf (@searchconfigs) { |
105 | my $file = $conf->{"file"}; |
106 | |
107 | next if ( ! -f "$file"); |
108 | |
109 | if (defined($conf->{"test"})) { |
110 | `$conf->{"test"} $conf->{"file"} 2>/dev/null`; |
111 | next if ($?); |
112 | } |
113 | |
114 | my $exec = $conf->{"exec"}; |
115 | |
116 | print STDERR "using config: '$file'\n"; |
117 | |
118 | open(CIN, "$exec $file |") || die "Failed to run $exec $file"; |
119 | return; |
120 | } |
121 | die "No config file found"; |
122 | } |
123 | |
124 | find_config; |
125 | |
126 | # Read in the entire config file into config_file |
127 | my @config_file = <CIN>; |
128 | close CIN; |
129 | |
130 | # Parse options |
131 | my $localmodconfig = 0; |
132 | my $localyesconfig = 0; |
133 | |
134 | GetOptions("localmodconfig" => \$localmodconfig, |
135 | "localyesconfig" => \$localyesconfig); |
136 | |
137 | # Get the build source and top level Kconfig file (passed in) |
138 | my $ksource = $ARGV[0]; |
139 | my $kconfig = $ARGV[1]; |
140 | my $lsmod_file = $ENV{'LSMOD'}; |
141 | |
142 | my @makefiles = `find $ksource -name Makefile 2>/dev/null`; |
143 | chomp @makefiles; |
144 | |
145 | my %depends; |
146 | my %selects; |
147 | my %prompts; |
148 | my %objects; |
149 | my $var; |
150 | my $iflevel = 0; |
151 | my @ifdeps; |
152 | |
153 | # prevent recursion |
154 | my %read_kconfigs; |
155 | |
156 | sub read_kconfig { |
157 | my ($kconfig) = @_; |
158 | |
159 | my $state = "NONE"; |
160 | my $config; |
161 | my @kconfigs; |
162 | |
163 | my $cont = 0; |
164 | my $line; |
165 | |
166 | my $source = "$ksource/$kconfig"; |
167 | my $last_source = ""; |
168 | |
169 | # Check for any environment variables used |
170 | while ($source =~ /\$(\w+)/ && $last_source ne $source) { |
171 | my $env = $1; |
172 | $last_source = $source; |
173 | $source =~ s/\$$env/$ENV{$env}/; |
174 | } |
175 | |
176 | open(KIN, "$source") || die "Can't open $kconfig"; |
177 | while (<KIN>) { |
178 | chomp; |
179 | |
180 | # Make sure that lines ending with \ continue |
181 | if ($cont) { |
182 | $_ = $line . " " . $_; |
183 | } |
184 | |
185 | if (s/\\$//) { |
186 | $cont = 1; |
187 | $line = $_; |
188 | next; |
189 | } |
190 | |
191 | $cont = 0; |
192 | |
193 | # collect any Kconfig sources |
194 | if (/^source\s*"(.*)"/) { |
195 | $kconfigs[$#kconfigs+1] = $1; |
196 | } |
197 | |
198 | # configs found |
199 | if (/^\s*(menu)?config\s+(\S+)\s*$/) { |
200 | $state = "NEW"; |
201 | $config = $2; |
202 | |
203 | # Add depends for 'if' nesting |
204 | for (my $i = 0; $i < $iflevel; $i++) { |
205 | if ($i) { |
206 | $depends{$config} .= " " . $ifdeps[$i]; |
207 | } else { |
208 | $depends{$config} = $ifdeps[$i]; |
209 | } |
210 | $state = "DEP"; |
211 | } |
212 | |
213 | # collect the depends for the config |
214 | } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) { |
215 | $state = "DEP"; |
216 | $depends{$config} = $1; |
217 | } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) { |
218 | $depends{$config} .= " " . $1; |
219 | |
220 | # Get the configs that select this config |
221 | } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) { |
222 | my $conf = $1; |
223 | if (defined($selects{$conf})) { |
224 | $selects{$conf} .= " " . $config; |
225 | } else { |
226 | $selects{$conf} = $config; |
227 | } |
228 | |
229 | # configs without prompts must be selected |
230 | } elsif ($state ne "NONE" && /^\s*tristate\s\S/) { |
231 | # note if the config has a prompt |
232 | $prompts{$config} = 1; |
233 | |
234 | # Check for if statements |
235 | } elsif (/^if\s+(.*\S)\s*$/) { |
236 | my $deps = $1; |
237 | # remove beginning and ending non text |
238 | $deps =~ s/^[^a-zA-Z0-9_]*//; |
239 | $deps =~ s/[^a-zA-Z0-9_]*$//; |
240 | |
241 | my @deps = split /[^a-zA-Z0-9_]+/, $deps; |
242 | |
243 | $ifdeps[$iflevel++] = join ':', @deps; |
244 | |
245 | } elsif (/^endif/) { |
246 | |
247 | $iflevel-- if ($iflevel); |
248 | |
249 | # stop on "help" |
250 | } elsif (/^\s*help\s*$/) { |
251 | $state = "NONE"; |
252 | } |
253 | } |
254 | close(KIN); |
255 | |
256 | # read in any configs that were found. |
257 | foreach $kconfig (@kconfigs) { |
258 | if (!defined($read_kconfigs{$kconfig})) { |
259 | $read_kconfigs{$kconfig} = 1; |
260 | read_kconfig($kconfig); |
261 | } |
262 | } |
263 | } |
264 | |
265 | if ($kconfig) { |
266 | read_kconfig($kconfig); |
267 | } |
268 | |
269 | # Makefiles can use variables to define their dependencies |
270 | sub convert_vars { |
271 | my ($line, %vars) = @_; |
272 | |
273 | my $process = ""; |
274 | |
275 | while ($line =~ s/^(.*?)(\$\((.*?)\))//) { |
276 | my $start = $1; |
277 | my $variable = $2; |
278 | my $var = $3; |
279 | |
280 | if (defined($vars{$var})) { |
281 | $process .= $start . $vars{$var}; |
282 | } else { |
283 | $process .= $start . $variable; |
284 | } |
285 | } |
286 | |
287 | $process .= $line; |
288 | |
289 | return $process; |
290 | } |
291 | |
292 | # Read all Makefiles to map the configs to the objects |
293 | foreach my $makefile (@makefiles) { |
294 | |
295 | my $line = ""; |
296 | my %make_vars; |
297 | |
298 | open(MIN,$makefile) || die "Can't open $makefile"; |
299 | while (<MIN>) { |
300 | # if this line ends with a backslash, continue |
301 | chomp; |
302 | if (/^(.*)\\$/) { |
303 | $line .= $1; |
304 | next; |
305 | } |
306 | |
307 | $line .= $_; |
308 | $_ = $line; |
309 | $line = ""; |
310 | |
311 | my $objs; |
312 | |
313 | # Convert variables in a line (could define configs) |
314 | $_ = convert_vars($_, %make_vars); |
315 | |
316 | # collect objects after obj-$(CONFIG_FOO_BAR) |
317 | if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) { |
318 | $var = $1; |
319 | $objs = $2; |
320 | |
321 | # check if variables are set |
322 | } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) { |
323 | $make_vars{$1} = $2; |
324 | } |
325 | if (defined($objs)) { |
326 | foreach my $obj (split /\s+/,$objs) { |
327 | $obj =~ s/-/_/g; |
328 | if ($obj =~ /(.*)\.o$/) { |
329 | # Objects may be enabled by more than one config. |
330 | # Store configs in an array. |
331 | my @arr; |
332 | |
333 | if (defined($objects{$1})) { |
334 | @arr = @{$objects{$1}}; |
335 | } |
336 | |
337 | $arr[$#arr+1] = $var; |
338 | |
339 | # The objects have a hash mapping to a reference |
340 | # of an array of configs. |
341 | $objects{$1} = \@arr; |
342 | } |
343 | } |
344 | } |
345 | } |
346 | close(MIN); |
347 | } |
348 | |
349 | my %modules; |
350 | |
351 | if (defined($lsmod_file)) { |
352 | if ( ! -f $lsmod_file) { |
353 | if ( -f $ENV{'objtree'}."/".$lsmod_file) { |
354 | $lsmod_file = $ENV{'objtree'}."/".$lsmod_file; |
355 | } else { |
356 | die "$lsmod_file not found"; |
357 | } |
358 | } |
359 | if ( -x $lsmod_file) { |
360 | # the file is executable, run it |
361 | open(LIN, "$lsmod_file|"); |
362 | } else { |
363 | # Just read the contents |
364 | open(LIN, "$lsmod_file"); |
365 | } |
366 | } else { |
367 | |
368 | # see what modules are loaded on this system |
369 | my $lsmod; |
370 | |
371 | foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) { |
372 | if ( -x "$dir/lsmod" ) { |
373 | $lsmod = "$dir/lsmod"; |
374 | last; |
375 | } |
376 | } |
377 | if (!defined($lsmod)) { |
378 | # try just the path |
379 | $lsmod = "lsmod"; |
380 | } |
381 | |
382 | open(LIN,"$lsmod|") || die "Can not call lsmod with $lsmod"; |
383 | } |
384 | |
385 | while (<LIN>) { |
386 | next if (/^Module/); # Skip the first line. |
387 | if (/^(\S+)/) { |
388 | $modules{$1} = 1; |
389 | } |
390 | } |
391 | close (LIN); |
392 | |
393 | # add to the configs hash all configs that are needed to enable |
394 | # a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o |
395 | # where we know we need bar.o so we add FOO to the list. |
396 | my %configs; |
397 | foreach my $module (keys(%modules)) { |
398 | if (defined($objects{$module})) { |
399 | my @arr = @{$objects{$module}}; |
400 | foreach my $conf (@arr) { |
401 | $configs{$conf} = $module; |
402 | dprint "$conf added by direct ($module)\n"; |
403 | } |
404 | } else { |
405 | # Most likely, someone has a custom (binary?) module loaded. |
406 | print STDERR "$module config not found!!\n"; |
407 | } |
408 | } |
409 | |
410 | # Read the current config, and see what is enabled. We want to |
411 | # ignore configs that we would not enable anyway. |
412 | |
413 | my %orig_configs; |
414 | my $valid = "A-Za-z_0-9"; |
415 | |
416 | foreach my $line (@config_file) { |
417 | $_ = $line; |
418 | |
419 | if (/(CONFIG_[$valid]*)=(m|y)/) { |
420 | $orig_configs{$1} = $2; |
421 | } |
422 | } |
423 | |
424 | my $repeat = 1; |
425 | |
426 | my $depconfig; |
427 | |
428 | # |
429 | # Note, we do not care about operands (like: &&, ||, !) we want to add any |
430 | # config that is in the depend list of another config. This script does |
431 | # not enable configs that are not already enabled. If we come across a |
432 | # config A that depends on !B, we can still add B to the list of depends |
433 | # to keep on. If A was on in the original config, B would not have been |
434 | # and B would not be turned on by this script. |
435 | # |
436 | sub parse_config_depends |
437 | { |
438 | my ($p) = @_; |
439 | |
440 | while ($p =~ /[$valid]/) { |
441 | |
442 | if ($p =~ /^[^$valid]*([$valid]+)/) { |
443 | my $conf = "CONFIG_" . $1; |
444 | |
445 | $p =~ s/^[^$valid]*[$valid]+//; |
446 | |
447 | # We only need to process if the depend config is a module |
448 | if (!defined($orig_configs{$conf}) || !$orig_configs{conf} eq "m") { |
449 | next; |
450 | } |
451 | |
452 | if (!defined($configs{$conf})) { |
453 | # We must make sure that this config has its |
454 | # dependencies met. |
455 | $repeat = 1; # do again |
456 | dprint "$conf selected by depend $depconfig\n"; |
457 | $configs{$conf} = 1; |
458 | } |
459 | } else { |
460 | die "this should never happen"; |
461 | } |
462 | } |
463 | } |
464 | |
465 | # Select is treated a bit differently than depends. We call this |
466 | # when a config has no prompt and requires another config to be |
467 | # selected. We use to just select all configs that selected this |
468 | # config, but found that that can balloon into enabling hundreds |
469 | # of configs that we do not care about. |
470 | # |
471 | # The idea is we look at all the configs that select it. If one |
472 | # is already in our list of configs to enable, then there's nothing |
473 | # else to do. If there isn't, we pick the first config that was |
474 | # enabled in the orignal config and use that. |
475 | sub parse_config_selects |
476 | { |
477 | my ($config, $p) = @_; |
478 | |
479 | my $next_config; |
480 | |
481 | while ($p =~ /[$valid]/) { |
482 | |
483 | if ($p =~ /^[^$valid]*([$valid]+)/) { |
484 | my $conf = "CONFIG_" . $1; |
485 | |
486 | $p =~ s/^[^$valid]*[$valid]+//; |
487 | |
488 | # Make sure that this config exists in the current .config file |
489 | if (!defined($orig_configs{$conf})) { |
490 | dprint "$conf not set for $config select\n"; |
491 | next; |
492 | } |
493 | |
494 | # Check if something other than a module selects this config |
495 | if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") { |
496 | dprint "$conf (non module) selects config, we are good\n"; |
497 | # we are good with this |
498 | return; |
499 | } |
500 | if (defined($configs{$conf})) { |
501 | dprint "$conf selects $config so we are good\n"; |
502 | # A set config selects this config, we are good |
503 | return; |
504 | } |
505 | # Set this config to be selected |
506 | if (!defined($next_config)) { |
507 | $next_config = $conf; |
508 | } |
509 | } else { |
510 | die "this should never happen"; |
511 | } |
512 | } |
513 | |
514 | # If no possible config selected this, then something happened. |
515 | if (!defined($next_config)) { |
516 | print STDERR "WARNING: $config is required, but nothing in the\n"; |
517 | print STDERR " current config selects it.\n"; |
518 | return; |
519 | } |
520 | |
521 | # If we are here, then we found no config that is set and |
522 | # selects this config. Repeat. |
523 | $repeat = 1; |
524 | # Make this config need to be selected |
525 | $configs{$next_config} = 1; |
526 | dprint "$next_config selected by select $config\n"; |
527 | } |
528 | |
529 | my %process_selects; |
530 | |
531 | # loop through all configs, select their dependencies. |
532 | sub loop_depend { |
533 | $repeat = 1; |
534 | |
535 | while ($repeat) { |
536 | $repeat = 0; |
537 | |
538 | forloop: |
539 | foreach my $config (keys %configs) { |
540 | |
541 | # If this config is not a module, we do not need to process it |
542 | if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") { |
543 | next forloop; |
544 | } |
545 | |
546 | $config =~ s/^CONFIG_//; |
547 | $depconfig = $config; |
548 | |
549 | if (defined($depends{$config})) { |
550 | # This config has dependencies. Make sure they are also included |
551 | parse_config_depends $depends{$config}; |
552 | } |
553 | |
554 | # If the config has no prompt, then we need to check if a config |
555 | # that is enabled selected it. Or if we need to enable one. |
556 | if (!defined($prompts{$config}) && defined($selects{$config})) { |
557 | $process_selects{$config} = 1; |
558 | } |
559 | } |
560 | } |
561 | } |
562 | |
563 | sub loop_select { |
564 | |
565 | foreach my $config (keys %process_selects) { |
566 | $config =~ s/^CONFIG_//; |
567 | |
568 | dprint "Process select $config\n"; |
569 | |
570 | # config has no prompt and must be selected. |
571 | parse_config_selects $config, $selects{$config}; |
572 | } |
573 | } |
574 | |
575 | while ($repeat) { |
576 | # Get the first set of configs and their dependencies. |
577 | loop_depend; |
578 | |
579 | $repeat = 0; |
580 | |
581 | # Now we need to see if we have to check selects; |
582 | loop_select; |
583 | } |
584 | |
585 | my %setconfigs; |
586 | |
587 | # Finally, read the .config file and turn off any module enabled that |
588 | # we could not find a reason to keep enabled. |
589 | foreach my $line (@config_file) { |
590 | $_ = $line; |
591 | |
592 | if (/CONFIG_IKCONFIG/) { |
593 | if (/# CONFIG_IKCONFIG is not set/) { |
594 | # enable IKCONFIG at least as a module |
595 | print "CONFIG_IKCONFIG=m\n"; |
596 | # don't ask about PROC |
597 | print "# CONFIG_IKCONFIG_PROC is not set\n"; |
598 | } else { |
599 | print; |
600 | } |
601 | next; |
602 | } |
603 | |
604 | if (/^(CONFIG.*)=(m|y)/) { |
605 | if (defined($configs{$1})) { |
606 | if ($localyesconfig) { |
607 | $setconfigs{$1} = 'y'; |
608 | } else { |
609 | $setconfigs{$1} = $2; |
610 | } |
611 | } elsif ($2 eq "m") { |
612 | print "# $1 is not set\n"; |
613 | next; |
614 | } |
615 | } |
616 | print; |
617 | } |
618 | |
619 | # Integrity check, make sure all modules that we want enabled do |
620 | # indeed have their configs set. |
621 | loop: |
622 | foreach my $module (keys(%modules)) { |
623 | if (defined($objects{$module})) { |
624 | my @arr = @{$objects{$module}}; |
625 | foreach my $conf (@arr) { |
626 | if (defined($setconfigs{$conf})) { |
627 | next loop; |
628 | } |
629 | } |
630 | print STDERR "module $module did not have configs"; |
631 | foreach my $conf (@arr) { |
632 | print STDERR " " , $conf; |
633 | } |
634 | print STDERR "\n"; |
635 | } |
636 | } |
637 |
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jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9