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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utxface - External interfaces for "global" ACPI functions | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
a8357b0c | 8 | * Copyright (C) 2000 - 2010, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
48 | #include "acdebug.h" | |
49 | #include "actables.h" | |
1da177e4 LT |
50 | |
51 | #define _COMPONENT ACPI_UTILITIES | |
4be44fcd | 52 | ACPI_MODULE_NAME("utxface") |
1da177e4 | 53 | |
e20a679b | 54 | #ifndef ACPI_ASL_COMPILER |
1da177e4 LT |
55 | /******************************************************************************* |
56 | * | |
57 | * FUNCTION: acpi_initialize_subsystem | |
58 | * | |
59 | * PARAMETERS: None | |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
63 | * DESCRIPTION: Initializes all global variables. This is the first function | |
64 | * called, so any early initialization belongs here. | |
65 | * | |
66 | ******************************************************************************/ | |
dd272b57 | 67 | acpi_status __init acpi_initialize_subsystem(void) |
1da177e4 | 68 | { |
4be44fcd | 69 | acpi_status status; |
44f6c012 | 70 | |
b229cf92 | 71 | ACPI_FUNCTION_TRACE(acpi_initialize_subsystem); |
1da177e4 | 72 | |
cb219bb6 | 73 | acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE; |
4be44fcd | 74 | ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace()); |
1da177e4 | 75 | |
1da177e4 LT |
76 | /* Initialize the OS-Dependent layer */ |
77 | ||
4be44fcd LB |
78 | status = acpi_os_initialize(); |
79 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 80 | ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization")); |
4be44fcd | 81 | return_ACPI_STATUS(status); |
1da177e4 LT |
82 | } |
83 | ||
73459f73 RM |
84 | /* Initialize all globals used by the subsystem */ |
85 | ||
b417d40b YY |
86 | status = acpi_ut_init_globals(); |
87 | if (ACPI_FAILURE(status)) { | |
88 | ACPI_EXCEPTION((AE_INFO, status, | |
89 | "During initialization of globals")); | |
90 | return_ACPI_STATUS(status); | |
91 | } | |
73459f73 | 92 | |
1da177e4 LT |
93 | /* Create the default mutex objects */ |
94 | ||
4be44fcd LB |
95 | status = acpi_ut_mutex_initialize(); |
96 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
97 | ACPI_EXCEPTION((AE_INFO, status, |
98 | "During Global Mutex creation")); | |
4be44fcd | 99 | return_ACPI_STATUS(status); |
1da177e4 LT |
100 | } |
101 | ||
102 | /* | |
103 | * Initialize the namespace manager and | |
104 | * the root of the namespace tree | |
105 | */ | |
4be44fcd LB |
106 | status = acpi_ns_root_initialize(); |
107 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
108 | ACPI_EXCEPTION((AE_INFO, status, |
109 | "During Namespace initialization")); | |
4be44fcd | 110 | return_ACPI_STATUS(status); |
1da177e4 LT |
111 | } |
112 | ||
1da177e4 LT |
113 | /* If configured, initialize the AML debugger */ |
114 | ||
4be44fcd | 115 | ACPI_DEBUGGER_EXEC(status = acpi_db_initialize()); |
4be44fcd | 116 | return_ACPI_STATUS(status); |
1da177e4 LT |
117 | } |
118 | ||
1da177e4 LT |
119 | /******************************************************************************* |
120 | * | |
121 | * FUNCTION: acpi_enable_subsystem | |
122 | * | |
123 | * PARAMETERS: Flags - Init/enable Options | |
124 | * | |
125 | * RETURN: Status | |
126 | * | |
127 | * DESCRIPTION: Completes the subsystem initialization including hardware. | |
128 | * Puts system into ACPI mode if it isn't already. | |
129 | * | |
130 | ******************************************************************************/ | |
4be44fcd | 131 | acpi_status acpi_enable_subsystem(u32 flags) |
1da177e4 | 132 | { |
4be44fcd | 133 | acpi_status status = AE_OK; |
1da177e4 | 134 | |
b229cf92 | 135 | ACPI_FUNCTION_TRACE(acpi_enable_subsystem); |
1da177e4 | 136 | |
1da177e4 LT |
137 | /* Enable ACPI mode */ |
138 | ||
139 | if (!(flags & ACPI_NO_ACPI_ENABLE)) { | |
4be44fcd LB |
140 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
141 | "[Init] Going into ACPI mode\n")); | |
1da177e4 LT |
142 | |
143 | acpi_gbl_original_mode = acpi_hw_get_mode(); | |
144 | ||
4be44fcd LB |
145 | status = acpi_enable(); |
146 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 147 | ACPI_WARNING((AE_INFO, "AcpiEnable failed")); |
4be44fcd | 148 | return_ACPI_STATUS(status); |
1da177e4 LT |
149 | } |
150 | } | |
151 | ||
009c4cbe BM |
152 | /* |
153 | * Obtain a permanent mapping for the FACS. This is required for the | |
154 | * Global Lock and the Firmware Waking Vector | |
155 | */ | |
156 | status = acpi_tb_initialize_facs(); | |
157 | if (ACPI_FAILURE(status)) { | |
158 | ACPI_WARNING((AE_INFO, "Could not map the FACS table")); | |
159 | return_ACPI_STATUS(status); | |
160 | } | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * Install the default op_region handlers. These are installed unless | |
164 | * other handlers have already been installed via the | |
165 | * install_address_space_handler interface. | |
166 | */ | |
167 | if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { | |
4be44fcd LB |
168 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
169 | "[Init] Installing default address space handlers\n")); | |
1da177e4 | 170 | |
4be44fcd LB |
171 | status = acpi_ev_install_region_handlers(); |
172 | if (ACPI_FAILURE(status)) { | |
173 | return_ACPI_STATUS(status); | |
1da177e4 LT |
174 | } |
175 | } | |
176 | ||
177 | /* | |
178 | * Initialize ACPI Event handling (Fixed and General Purpose) | |
179 | * | |
96db255c BM |
180 | * Note1: We must have the hardware and events initialized before we can |
181 | * execute any control methods safely. Any control method can require | |
182 | * ACPI hardware support, so the hardware must be fully initialized before | |
183 | * any method execution! | |
184 | * | |
185 | * Note2: Fixed events are initialized and enabled here. GPEs are | |
186 | * initialized, but cannot be enabled until after the hardware is | |
187 | * completely initialized (SCI and global_lock activated) | |
1da177e4 LT |
188 | */ |
189 | if (!(flags & ACPI_NO_EVENT_INIT)) { | |
4be44fcd LB |
190 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
191 | "[Init] Initializing ACPI events\n")); | |
1da177e4 | 192 | |
4be44fcd LB |
193 | status = acpi_ev_initialize_events(); |
194 | if (ACPI_FAILURE(status)) { | |
195 | return_ACPI_STATUS(status); | |
1da177e4 LT |
196 | } |
197 | } | |
198 | ||
96db255c BM |
199 | /* |
200 | * Install the SCI handler and Global Lock handler. This completes the | |
201 | * hardware initialization. | |
202 | */ | |
1da177e4 | 203 | if (!(flags & ACPI_NO_HANDLER_INIT)) { |
4be44fcd LB |
204 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
205 | "[Init] Installing SCI/GL handlers\n")); | |
1da177e4 | 206 | |
4be44fcd LB |
207 | status = acpi_ev_install_xrupt_handlers(); |
208 | if (ACPI_FAILURE(status)) { | |
209 | return_ACPI_STATUS(status); | |
1da177e4 LT |
210 | } |
211 | } | |
212 | ||
4be44fcd | 213 | return_ACPI_STATUS(status); |
1da177e4 LT |
214 | } |
215 | ||
8313524a BM |
216 | ACPI_EXPORT_SYMBOL(acpi_enable_subsystem) |
217 | ||
1da177e4 LT |
218 | /******************************************************************************* |
219 | * | |
220 | * FUNCTION: acpi_initialize_objects | |
221 | * | |
222 | * PARAMETERS: Flags - Init/enable Options | |
223 | * | |
224 | * RETURN: Status | |
225 | * | |
226 | * DESCRIPTION: Completes namespace initialization by initializing device | |
227 | * objects and executing AML code for Regions, buffers, etc. | |
228 | * | |
229 | ******************************************************************************/ | |
4be44fcd | 230 | acpi_status acpi_initialize_objects(u32 flags) |
1da177e4 | 231 | { |
4be44fcd | 232 | acpi_status status = AE_OK; |
1da177e4 | 233 | |
b229cf92 | 234 | ACPI_FUNCTION_TRACE(acpi_initialize_objects); |
1da177e4 LT |
235 | |
236 | /* | |
237 | * Run all _REG methods | |
238 | * | |
96db255c BM |
239 | * Note: Any objects accessed by the _REG methods will be automatically |
240 | * initialized, even if they contain executable AML (see the call to | |
241 | * acpi_ns_initialize_objects below). | |
1da177e4 LT |
242 | */ |
243 | if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { | |
4be44fcd | 244 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
b229cf92 | 245 | "[Init] Executing _REG OpRegion methods\n")); |
1da177e4 | 246 | |
4be44fcd LB |
247 | status = acpi_ev_initialize_op_regions(); |
248 | if (ACPI_FAILURE(status)) { | |
249 | return_ACPI_STATUS(status); | |
1da177e4 LT |
250 | } |
251 | } | |
252 | ||
7f0c826a LM |
253 | /* |
254 | * Execute any module-level code that was detected during the table load | |
255 | * phase. Although illegal since ACPI 2.0, there are many machines that | |
256 | * contain this type of code. Each block of detected executable AML code | |
257 | * outside of any control method is wrapped with a temporary control | |
258 | * method object and placed on a global list. The methods on this list | |
259 | * are executed below. | |
260 | */ | |
261 | acpi_ns_exec_module_code_list(); | |
262 | ||
1da177e4 | 263 | /* |
96db255c BM |
264 | * Initialize the objects that remain uninitialized. This runs the |
265 | * executable AML that may be part of the declaration of these objects: | |
266 | * operation_regions, buffer_fields, Buffers, and Packages. | |
1da177e4 LT |
267 | */ |
268 | if (!(flags & ACPI_NO_OBJECT_INIT)) { | |
4be44fcd LB |
269 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
270 | "[Init] Completing Initialization of ACPI Objects\n")); | |
1da177e4 | 271 | |
4be44fcd LB |
272 | status = acpi_ns_initialize_objects(); |
273 | if (ACPI_FAILURE(status)) { | |
274 | return_ACPI_STATUS(status); | |
1da177e4 LT |
275 | } |
276 | } | |
277 | ||
278 | /* | |
96db255c BM |
279 | * Initialize all device objects in the namespace. This runs the device |
280 | * _STA and _INI methods. | |
1da177e4 LT |
281 | */ |
282 | if (!(flags & ACPI_NO_DEVICE_INIT)) { | |
4be44fcd LB |
283 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
284 | "[Init] Initializing ACPI Devices\n")); | |
1da177e4 | 285 | |
4be44fcd LB |
286 | status = acpi_ns_initialize_devices(); |
287 | if (ACPI_FAILURE(status)) { | |
288 | return_ACPI_STATUS(status); | |
1da177e4 LT |
289 | } |
290 | } | |
291 | ||
20447027 AS |
292 | /* |
293 | * Complete the GPE initialization for the GPE blocks defined in the FADT | |
294 | * (GPE block 0 and 1). | |
295 | * | |
9874647b RW |
296 | * NOTE: Currently, there seems to be no need to run the _REG methods |
297 | * before enabling the GPEs. | |
20447027 AS |
298 | */ |
299 | if (!(flags & ACPI_NO_EVENT_INIT)) { | |
300 | status = acpi_ev_install_fadt_gpes(); | |
301 | if (ACPI_FAILURE(status)) | |
302 | return (status); | |
303 | } | |
304 | ||
1da177e4 LT |
305 | /* |
306 | * Empty the caches (delete the cached objects) on the assumption that | |
307 | * the table load filled them up more than they will be at runtime -- | |
308 | * thus wasting non-paged memory. | |
309 | */ | |
4be44fcd | 310 | status = acpi_purge_cached_objects(); |
1da177e4 LT |
311 | |
312 | acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; | |
4be44fcd | 313 | return_ACPI_STATUS(status); |
1da177e4 LT |
314 | } |
315 | ||
8313524a BM |
316 | ACPI_EXPORT_SYMBOL(acpi_initialize_objects) |
317 | ||
e20a679b | 318 | #endif |
1da177e4 LT |
319 | /******************************************************************************* |
320 | * | |
321 | * FUNCTION: acpi_terminate | |
322 | * | |
323 | * PARAMETERS: None | |
324 | * | |
325 | * RETURN: Status | |
326 | * | |
2f977b36 | 327 | * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources. |
1da177e4 LT |
328 | * |
329 | ******************************************************************************/ | |
4be44fcd | 330 | acpi_status acpi_terminate(void) |
1da177e4 | 331 | { |
4be44fcd | 332 | acpi_status status; |
1da177e4 | 333 | |
b229cf92 | 334 | ACPI_FUNCTION_TRACE(acpi_terminate); |
1da177e4 | 335 | |
2f977b36 BM |
336 | /* Just exit if subsystem is already shutdown */ |
337 | ||
338 | if (acpi_gbl_shutdown) { | |
339 | ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated")); | |
340 | return_ACPI_STATUS(AE_OK); | |
341 | } | |
342 | ||
343 | /* Subsystem appears active, go ahead and shut it down */ | |
344 | ||
345 | acpi_gbl_shutdown = TRUE; | |
346 | acpi_gbl_startup_flags = 0; | |
347 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n")); | |
348 | ||
1da177e4 LT |
349 | /* Terminate the AML Debugger if present */ |
350 | ||
351 | ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE); | |
352 | ||
353 | /* Shutdown and free all resources */ | |
354 | ||
4be44fcd | 355 | acpi_ut_subsystem_shutdown(); |
1da177e4 LT |
356 | |
357 | /* Free the mutex objects */ | |
358 | ||
4be44fcd | 359 | acpi_ut_mutex_terminate(); |
1da177e4 LT |
360 | |
361 | #ifdef ACPI_DEBUGGER | |
362 | ||
363 | /* Shut down the debugger */ | |
364 | ||
4be44fcd | 365 | acpi_db_terminate(); |
1da177e4 LT |
366 | #endif |
367 | ||
368 | /* Now we can shutdown the OS-dependent layer */ | |
369 | ||
4be44fcd LB |
370 | status = acpi_os_terminate(); |
371 | return_ACPI_STATUS(status); | |
1da177e4 LT |
372 | } |
373 | ||
8313524a | 374 | ACPI_EXPORT_SYMBOL(acpi_terminate) |
2f977b36 | 375 | |
e20a679b | 376 | #ifndef ACPI_ASL_COMPILER |
1da177e4 | 377 | #ifdef ACPI_FUTURE_USAGE |
44f6c012 | 378 | /******************************************************************************* |
1da177e4 LT |
379 | * |
380 | * FUNCTION: acpi_subsystem_status | |
381 | * | |
382 | * PARAMETERS: None | |
383 | * | |
384 | * RETURN: Status of the ACPI subsystem | |
385 | * | |
386 | * DESCRIPTION: Other drivers that use the ACPI subsystem should call this | |
44f6c012 RM |
387 | * before making any other calls, to ensure the subsystem |
388 | * initialized successfully. | |
1da177e4 | 389 | * |
44f6c012 | 390 | ******************************************************************************/ |
4be44fcd | 391 | acpi_status acpi_subsystem_status(void) |
1da177e4 | 392 | { |
44f6c012 | 393 | |
1da177e4 LT |
394 | if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) { |
395 | return (AE_OK); | |
4be44fcd | 396 | } else { |
1da177e4 LT |
397 | return (AE_ERROR); |
398 | } | |
399 | } | |
400 | ||
8313524a BM |
401 | ACPI_EXPORT_SYMBOL(acpi_subsystem_status) |
402 | ||
44f6c012 | 403 | /******************************************************************************* |
1da177e4 LT |
404 | * |
405 | * FUNCTION: acpi_get_system_info | |
406 | * | |
44f6c012 RM |
407 | * PARAMETERS: out_buffer - A buffer to receive the resources for the |
408 | * device | |
1da177e4 LT |
409 | * |
410 | * RETURN: Status - the status of the call | |
411 | * | |
412 | * DESCRIPTION: This function is called to get information about the current | |
413 | * state of the ACPI subsystem. It will return system information | |
414 | * in the out_buffer. | |
415 | * | |
416 | * If the function fails an appropriate status will be returned | |
417 | * and the value of out_buffer is undefined. | |
418 | * | |
419 | ******************************************************************************/ | |
4be44fcd | 420 | acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer) |
1da177e4 | 421 | { |
4be44fcd LB |
422 | struct acpi_system_info *info_ptr; |
423 | acpi_status status; | |
1da177e4 | 424 | |
b229cf92 | 425 | ACPI_FUNCTION_TRACE(acpi_get_system_info); |
1da177e4 LT |
426 | |
427 | /* Parameter validation */ | |
428 | ||
4be44fcd LB |
429 | status = acpi_ut_validate_buffer(out_buffer); |
430 | if (ACPI_FAILURE(status)) { | |
431 | return_ACPI_STATUS(status); | |
1da177e4 LT |
432 | } |
433 | ||
434 | /* Validate/Allocate/Clear caller buffer */ | |
435 | ||
4be44fcd LB |
436 | status = |
437 | acpi_ut_initialize_buffer(out_buffer, | |
438 | sizeof(struct acpi_system_info)); | |
439 | if (ACPI_FAILURE(status)) { | |
440 | return_ACPI_STATUS(status); | |
1da177e4 LT |
441 | } |
442 | ||
443 | /* | |
444 | * Populate the return buffer | |
445 | */ | |
4be44fcd | 446 | info_ptr = (struct acpi_system_info *)out_buffer->pointer; |
1da177e4 | 447 | |
4be44fcd | 448 | info_ptr->acpi_ca_version = ACPI_CA_VERSION; |
1da177e4 LT |
449 | |
450 | /* System flags (ACPI capabilities) */ | |
451 | ||
4be44fcd | 452 | info_ptr->flags = ACPI_SYS_MODE_ACPI; |
1da177e4 LT |
453 | |
454 | /* Timer resolution - 24 or 32 bits */ | |
455 | ||
f3d2e786 | 456 | if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) { |
1da177e4 | 457 | info_ptr->timer_resolution = 24; |
4be44fcd | 458 | } else { |
1da177e4 LT |
459 | info_ptr->timer_resolution = 32; |
460 | } | |
461 | ||
462 | /* Clear the reserved fields */ | |
463 | ||
4be44fcd LB |
464 | info_ptr->reserved1 = 0; |
465 | info_ptr->reserved2 = 0; | |
1da177e4 LT |
466 | |
467 | /* Current debug levels */ | |
468 | ||
4be44fcd LB |
469 | info_ptr->debug_layer = acpi_dbg_layer; |
470 | info_ptr->debug_level = acpi_dbg_level; | |
1da177e4 | 471 | |
4be44fcd | 472 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 473 | } |
1da177e4 | 474 | |
8313524a | 475 | ACPI_EXPORT_SYMBOL(acpi_get_system_info) |
1da177e4 LT |
476 | |
477 | /***************************************************************************** | |
478 | * | |
479 | * FUNCTION: acpi_install_initialization_handler | |
480 | * | |
481 | * PARAMETERS: Handler - Callback procedure | |
44f6c012 | 482 | * Function - Not (currently) used, see below |
1da177e4 LT |
483 | * |
484 | * RETURN: Status | |
485 | * | |
486 | * DESCRIPTION: Install an initialization handler | |
487 | * | |
488 | * TBD: When a second function is added, must save the Function also. | |
489 | * | |
490 | ****************************************************************************/ | |
1da177e4 | 491 | acpi_status |
4be44fcd | 492 | acpi_install_initialization_handler(acpi_init_handler handler, u32 function) |
1da177e4 LT |
493 | { |
494 | ||
495 | if (!handler) { | |
496 | return (AE_BAD_PARAMETER); | |
497 | } | |
498 | ||
499 | if (acpi_gbl_init_handler) { | |
500 | return (AE_ALREADY_EXISTS); | |
501 | } | |
502 | ||
503 | acpi_gbl_init_handler = handler; | |
504 | return AE_OK; | |
505 | } | |
506 | ||
8313524a | 507 | ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler) |
4be44fcd | 508 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
509 | /***************************************************************************** |
510 | * | |
511 | * FUNCTION: acpi_purge_cached_objects | |
512 | * | |
513 | * PARAMETERS: None | |
514 | * | |
515 | * RETURN: Status | |
516 | * | |
517 | * DESCRIPTION: Empty all caches (delete the cached objects) | |
518 | * | |
519 | ****************************************************************************/ | |
4be44fcd | 520 | acpi_status acpi_purge_cached_objects(void) |
1da177e4 | 521 | { |
b229cf92 | 522 | ACPI_FUNCTION_TRACE(acpi_purge_cached_objects); |
1da177e4 | 523 | |
4be44fcd LB |
524 | (void)acpi_os_purge_cache(acpi_gbl_state_cache); |
525 | (void)acpi_os_purge_cache(acpi_gbl_operand_cache); | |
526 | (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache); | |
527 | (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache); | |
528 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 529 | } |
8313524a BM |
530 | |
531 | ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects) | |
e20a679b | 532 | #endif |