1 /******************************************************************************
2 *
3 * Module Name: utxface - External interfaces for "global" ACPI functions
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2005, R. Byron Moore
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include <linux/module.h>
45
46 #include <acpi/acpi.h>
47 #include <acpi/acevents.h>
48 #include <acpi/acnamesp.h>
49 #include <acpi/acparser.h>
50 #include <acpi/acdispat.h>
51 #include <acpi/acdebug.h>
52
53 #define _COMPONENT ACPI_UTILITIES
54 ACPI_MODULE_NAME ("utxface")
55
56
57 /*******************************************************************************
58 *
59 * FUNCTION: acpi_initialize_subsystem
60 *
61 * PARAMETERS: None
62 *
63 * RETURN: Status
64 *
65 * DESCRIPTION: Initializes all global variables. This is the first function
66 * called, so any early initialization belongs here.
67 *
68 ******************************************************************************/
69
70 acpi_status
71 acpi_initialize_subsystem (
72 void)
73 {
74 acpi_status status;
75
76 ACPI_FUNCTION_TRACE ("acpi_initialize_subsystem");
77
78
79 ACPI_DEBUG_EXEC (acpi_ut_init_stack_ptr_trace ());
80
81
82 /* Initialize all globals used by the subsystem */
83
84 acpi_ut_init_globals ();
85
86 /* Initialize the OS-Dependent layer */
87
88 status = acpi_os_initialize ();
89 if (ACPI_FAILURE (status)) {
90 ACPI_REPORT_ERROR (("OSD failed to initialize, %s\n",
91 acpi_format_exception (status)));
92 return_ACPI_STATUS (status);
93 }
94
95 /* Create the default mutex objects */
96
97 status = acpi_ut_mutex_initialize ();
98 if (ACPI_FAILURE (status)) {
99 ACPI_REPORT_ERROR (("Global mutex creation failure, %s\n",
100 acpi_format_exception (status)));
101 return_ACPI_STATUS (status);
102 }
103
104 /*
105 * Initialize the namespace manager and
106 * the root of the namespace tree
107 */
108
109 status = acpi_ns_root_initialize ();
110 if (ACPI_FAILURE (status)) {
111 ACPI_REPORT_ERROR (("Namespace initialization failure, %s\n",
112 acpi_format_exception (status)));
113 return_ACPI_STATUS (status);
114 }
115
116
117 /* If configured, initialize the AML debugger */
118
119 ACPI_DEBUGGER_EXEC (status = acpi_db_initialize ());
120
121 return_ACPI_STATUS (status);
122 }
123
124
125 /*******************************************************************************
126 *
127 * FUNCTION: acpi_enable_subsystem
128 *
129 * PARAMETERS: Flags - Init/enable Options
130 *
131 * RETURN: Status
132 *
133 * DESCRIPTION: Completes the subsystem initialization including hardware.
134 * Puts system into ACPI mode if it isn't already.
135 *
136 ******************************************************************************/
137
138 acpi_status
139 acpi_enable_subsystem (
140 u32 flags)
141 {
142 acpi_status status = AE_OK;
143
144
145 ACPI_FUNCTION_TRACE ("acpi_enable_subsystem");
146
147
148 /*
149 * We must initialize the hardware before we can enable ACPI.
150 * The values from the FADT are validated here.
151 */
152 if (!(flags & ACPI_NO_HARDWARE_INIT)) {
153 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI hardware\n"));
154
155 status = acpi_hw_initialize ();
156 if (ACPI_FAILURE (status)) {
157 return_ACPI_STATUS (status);
158 }
159 }
160
161 /* Enable ACPI mode */
162
163 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
164 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
165
166 acpi_gbl_original_mode = acpi_hw_get_mode();
167
168 status = acpi_enable ();
169 if (ACPI_FAILURE (status)) {
170 ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_enable failed.\n"));
171 return_ACPI_STATUS (status);
172 }
173 }
174
175 /*
176 * Install the default op_region handlers. These are installed unless
177 * other handlers have already been installed via the
178 * install_address_space_handler interface.
179 */
180 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
181 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Installing default address space handlers\n"));
182
183 status = acpi_ev_install_region_handlers ();
184 if (ACPI_FAILURE (status)) {
185 return_ACPI_STATUS (status);
186 }
187 }
188
189 /*
190 * Initialize ACPI Event handling (Fixed and General Purpose)
191 *
192 * NOTE: We must have the hardware AND events initialized before we can execute
193 * ANY control methods SAFELY. Any control method can require ACPI hardware
194 * support, so the hardware MUST be initialized before execution!
195 */
196 if (!(flags & ACPI_NO_EVENT_INIT)) {
197 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI events\n"));
198
199 status = acpi_ev_initialize_events ();
200 if (ACPI_FAILURE (status)) {
201 return_ACPI_STATUS (status);
202 }
203 }
204
205 /* Install the SCI handler and Global Lock handler */
206
207 if (!(flags & ACPI_NO_HANDLER_INIT)) {
208 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Installing SCI/GL handlers\n"));
209
210 status = acpi_ev_install_xrupt_handlers ();
211 if (ACPI_FAILURE (status)) {
212 return_ACPI_STATUS (status);
213 }
214 }
215
216 return_ACPI_STATUS (status);
217 }
218
219 /*******************************************************************************
220 *
221 * FUNCTION: acpi_initialize_objects
222 *
223 * PARAMETERS: Flags - Init/enable Options
224 *
225 * RETURN: Status
226 *
227 * DESCRIPTION: Completes namespace initialization by initializing device
228 * objects and executing AML code for Regions, buffers, etc.
229 *
230 ******************************************************************************/
231
232 acpi_status
233 acpi_initialize_objects (
234 u32 flags)
235 {
236 acpi_status status = AE_OK;
237
238
239 ACPI_FUNCTION_TRACE ("acpi_initialize_objects");
240
241
242 /*
243 * Run all _REG methods
244 *
245 * NOTE: Any objects accessed
246 * by the _REG methods will be automatically initialized, even if they
247 * contain executable AML (see call to acpi_ns_initialize_objects below).
248 */
249 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
250 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Executing _REG op_region methods\n"));
251
252 status = acpi_ev_initialize_op_regions ();
253 if (ACPI_FAILURE (status)) {
254 return_ACPI_STATUS (status);
255 }
256 }
257
258 /*
259 * Initialize the objects that remain uninitialized. This
260 * runs the executable AML that may be part of the declaration of these
261 * objects: operation_regions, buffer_fields, Buffers, and Packages.
262 */
263 if (!(flags & ACPI_NO_OBJECT_INIT)) {
264 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Completing Initialization of ACPI Objects\n"));
265
266 status = acpi_ns_initialize_objects ();
267 if (ACPI_FAILURE (status)) {
268 return_ACPI_STATUS (status);
269 }
270 }
271
272 /*
273 * Initialize all device objects in the namespace
274 * This runs the _STA and _INI methods.
275 */
276 if (!(flags & ACPI_NO_DEVICE_INIT)) {
277 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI Devices\n"));
278
279 status = acpi_ns_initialize_devices ();
280 if (ACPI_FAILURE (status)) {
281 return_ACPI_STATUS (status);
282 }
283 }
284
285 /*
286 * Empty the caches (delete the cached objects) on the assumption that
287 * the table load filled them up more than they will be at runtime --
288 * thus wasting non-paged memory.
289 */
290 status = acpi_purge_cached_objects ();
291
292 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
293 return_ACPI_STATUS (status);
294 }
295
296
297 /*******************************************************************************
298 *
299 * FUNCTION: acpi_terminate
300 *
301 * PARAMETERS: None
302 *
303 * RETURN: Status
304 *
305 * DESCRIPTION: Shutdown the ACPI subsystem. Release all resources.
306 *
307 ******************************************************************************/
308
309 acpi_status
310 acpi_terminate (void)
311 {
312 acpi_status status;
313
314
315 ACPI_FUNCTION_TRACE ("acpi_terminate");
316
317
318 /* Terminate the AML Debugger if present */
319
320 ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
321
322 /* Shutdown and free all resources */
323
324 acpi_ut_subsystem_shutdown ();
325
326
327 /* Free the mutex objects */
328
329 acpi_ut_mutex_terminate ();
330
331
332 #ifdef ACPI_DEBUGGER
333
334 /* Shut down the debugger */
335
336 acpi_db_terminate ();
337 #endif
338
339 /* Now we can shutdown the OS-dependent layer */
340
341 status = acpi_os_terminate ();
342 return_ACPI_STATUS (status);
343 }
344
345
346 #ifdef ACPI_FUTURE_USAGE
347
348 /*****************************************************************************
349 *
350 * FUNCTION: acpi_subsystem_status
351 *
352 * PARAMETERS: None
353 *
354 * RETURN: Status of the ACPI subsystem
355 *
356 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
357 * before making any other calls, to ensure the subsystem initial-
358 * ized successfully.
359 *
360 ****************************************************************************/
361
362 acpi_status
363 acpi_subsystem_status (void)
364 {
365 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
366 return (AE_OK);
367 }
368 else {
369 return (AE_ERROR);
370 }
371 }
372
373
374 /******************************************************************************
375 *
376 * FUNCTION: acpi_get_system_info
377 *
378 * PARAMETERS: out_buffer - a pointer to a buffer to receive the
379 * resources for the device
380 * buffer_length - the number of bytes available in the buffer
381 *
382 * RETURN: Status - the status of the call
383 *
384 * DESCRIPTION: This function is called to get information about the current
385 * state of the ACPI subsystem. It will return system information
386 * in the out_buffer.
387 *
388 * If the function fails an appropriate status will be returned
389 * and the value of out_buffer is undefined.
390 *
391 ******************************************************************************/
392
393 acpi_status
394 acpi_get_system_info (
395 struct acpi_buffer *out_buffer)
396 {
397 struct acpi_system_info *info_ptr;
398 u32 i;
399 acpi_status status;
400
401
402 ACPI_FUNCTION_TRACE ("acpi_get_system_info");
403
404
405 /* Parameter validation */
406
407 status = acpi_ut_validate_buffer (out_buffer);
408 if (ACPI_FAILURE (status)) {
409 return_ACPI_STATUS (status);
410 }
411
412 /* Validate/Allocate/Clear caller buffer */
413
414 status = acpi_ut_initialize_buffer (out_buffer, sizeof (struct acpi_system_info));
415 if (ACPI_FAILURE (status)) {
416 return_ACPI_STATUS (status);
417 }
418
419 /*
420 * Populate the return buffer
421 */
422 info_ptr = (struct acpi_system_info *) out_buffer->pointer;
423
424 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
425
426 /* System flags (ACPI capabilities) */
427
428 info_ptr->flags = ACPI_SYS_MODE_ACPI;
429
430 /* Timer resolution - 24 or 32 bits */
431
432 if (!acpi_gbl_FADT) {
433 info_ptr->timer_resolution = 0;
434 }
435 else if (acpi_gbl_FADT->tmr_val_ext == 0) {
436 info_ptr->timer_resolution = 24;
437 }
438 else {
439 info_ptr->timer_resolution = 32;
440 }
441
442 /* Clear the reserved fields */
443
444 info_ptr->reserved1 = 0;
445 info_ptr->reserved2 = 0;
446
447 /* Current debug levels */
448
449 info_ptr->debug_layer = acpi_dbg_layer;
450 info_ptr->debug_level = acpi_dbg_level;
451
452 /* Current status of the ACPI tables, per table type */
453
454 info_ptr->num_table_types = NUM_ACPI_TABLE_TYPES;
455 for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
456 info_ptr->table_info[i].count = acpi_gbl_table_lists[i].count;
457 }
458
459 return_ACPI_STATUS (AE_OK);
460 }
461 EXPORT_SYMBOL(acpi_get_system_info);
462
463
464 /*****************************************************************************
465 *
466 * FUNCTION: acpi_install_initialization_handler
467 *
468 * PARAMETERS: Handler - Callback procedure
469 *
470 * RETURN: Status
471 *
472 * DESCRIPTION: Install an initialization handler
473 *
474 * TBD: When a second function is added, must save the Function also.
475 *
476 ****************************************************************************/
477
478 acpi_status
479 acpi_install_initialization_handler (
480 acpi_init_handler handler,
481 u32 function)
482 {
483
484 if (!handler) {
485 return (AE_BAD_PARAMETER);
486 }
487
488 if (acpi_gbl_init_handler) {
489 return (AE_ALREADY_EXISTS);
490 }
491
492 acpi_gbl_init_handler = handler;
493 return AE_OK;
494 }
495
496 #endif /* ACPI_FUTURE_USAGE */
497
498
499 /*****************************************************************************
500 *
501 * FUNCTION: acpi_purge_cached_objects
502 *
503 * PARAMETERS: None
504 *
505 * RETURN: Status
506 *
507 * DESCRIPTION: Empty all caches (delete the cached objects)
508 *
509 ****************************************************************************/
510
511 acpi_status
512 acpi_purge_cached_objects (void)
513 {
514 ACPI_FUNCTION_TRACE ("acpi_purge_cached_objects");
515
516
517 #ifdef ACPI_ENABLE_OBJECT_CACHE
518 acpi_ut_delete_generic_state_cache ();
519 acpi_ut_delete_object_cache ();
520 acpi_ds_delete_walk_state_cache ();
521 acpi_ps_delete_parse_cache ();
522 #endif
523
524 return_ACPI_STATUS (AE_OK);
525 }
526
|
This page was automatically generated by the
LXR engine.
|