blob: b1f5f680bc783c7cca12adefd708a5de0ee97272 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: utxface - External interfaces for "global" ACPI functions
4 *
5 *****************************************************************************/
6
7/*
Len Brown75a44ce2008-04-23 23:00:13 -04008 * Copyright (C) 2000 - 2008, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
48#include "acdebug.h"
49#include "actables.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#define _COMPONENT ACPI_UTILITIES
Len Brown4be44fc2005-08-05 00:44:28 -040052ACPI_MODULE_NAME("utxface")
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Bob Mooree20a6792008-04-10 19:06:38 +040054#ifndef ACPI_ASL_COMPILER
Linus Torvalds1da177e2005-04-16 15:20:36 -070055/*******************************************************************************
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 ******************************************************************************/
Len Browndd272b52007-05-30 00:26:11 -040067acpi_status __init acpi_initialize_subsystem(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
Len Brown4be44fc2005-08-05 00:44:28 -040069 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Bob Mooreb229cf92006-04-21 17:15:00 -040071 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
Robert Moore44f6c012005-04-18 22:49:35 -040072
Bob Moorecb219bb2007-02-02 19:48:21 +030073 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
Len Brown4be44fc2005-08-05 00:44:28 -040074 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 /* Initialize the OS-Dependent layer */
77
Len Brown4be44fc2005-08-05 00:44:28 -040078 status = acpi_os_initialize();
79 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -050080 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
Len Brown4be44fc2005-08-05 00:44:28 -040081 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 }
83
Robert Moore73459f72005-06-24 00:00:00 -040084 /* Initialize all globals used by the subsystem */
85
Yi Yangb417d402008-08-04 10:30:09 +080086 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 }
Robert Moore73459f72005-06-24 00:00:00 -040092
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 /* Create the default mutex objects */
94
Len Brown4be44fc2005-08-05 00:44:28 -040095 status = acpi_ut_mutex_initialize();
96 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -050097 ACPI_EXCEPTION((AE_INFO, status,
98 "During Global Mutex creation"));
Len Brown4be44fc2005-08-05 00:44:28 -040099 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
101
102 /*
103 * Initialize the namespace manager and
104 * the root of the namespace tree
105 */
Len Brown4be44fc2005-08-05 00:44:28 -0400106 status = acpi_ns_root_initialize();
107 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500108 ACPI_EXCEPTION((AE_INFO, status,
109 "During Namespace initialization"));
Len Brown4be44fc2005-08-05 00:44:28 -0400110 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 }
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 /* If configured, initialize the AML debugger */
114
Len Brown4be44fc2005-08-05 00:44:28 -0400115 ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
Len Brown4be44fc2005-08-05 00:44:28 -0400116 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117}
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119/*******************************************************************************
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 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400131acpi_status acpi_enable_subsystem(u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
Len Brown4be44fc2005-08-05 00:44:28 -0400133 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Bob Mooreb229cf92006-04-21 17:15:00 -0400135 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 /* Enable ACPI mode */
138
139 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400140 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
141 "[Init] Going into ACPI mode\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143 acpi_gbl_original_mode = acpi_hw_get_mode();
144
Len Brown4be44fc2005-08-05 00:44:28 -0400145 status = acpi_enable();
146 if (ACPI_FAILURE(status)) {
Bob Mooreb229cf92006-04-21 17:15:00 -0400147 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
Len Brown4be44fc2005-08-05 00:44:28 -0400148 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 }
150 }
151
152 /*
Bob Moore009c4cbe2008-11-12 15:34:52 +0800153 * 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
162 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 * 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)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400168 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
169 "[Init] Installing default address space handlers\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Len Brown4be44fc2005-08-05 00:44:28 -0400171 status = acpi_ev_install_region_handlers();
172 if (ACPI_FAILURE(status)) {
173 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 }
175 }
176
177 /*
178 * Initialize ACPI Event handling (Fixed and General Purpose)
179 *
Bob Moore96db2552005-11-02 00:00:00 -0500180 * 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 */
189 if (!(flags & ACPI_NO_EVENT_INIT)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400190 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
191 "[Init] Initializing ACPI events\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Len Brown4be44fc2005-08-05 00:44:28 -0400193 status = acpi_ev_initialize_events();
194 if (ACPI_FAILURE(status)) {
195 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 }
197 }
198
Bob Moore96db2552005-11-02 00:00:00 -0500199 /*
200 * Install the SCI handler and Global Lock handler. This completes the
201 * hardware initialization.
202 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 if (!(flags & ACPI_NO_HANDLER_INIT)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400204 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
205 "[Init] Installing SCI/GL handlers\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Len Brown4be44fc2005-08-05 00:44:28 -0400207 status = acpi_ev_install_xrupt_handlers();
208 if (ACPI_FAILURE(status)) {
209 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 }
211 }
212
Len Brown4be44fc2005-08-05 00:44:28 -0400213 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
Bob Moore83135242006-10-03 00:00:00 -0400216ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218/*******************************************************************************
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 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400230acpi_status acpi_initialize_objects(u32 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Len Brown4be44fc2005-08-05 00:44:28 -0400232 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Bob Mooreb229cf92006-04-21 17:15:00 -0400234 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
236 /*
237 * Run all _REG methods
238 *
Bob Moore96db2552005-11-02 00:00:00 -0500239 * 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).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 */
243 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400244 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400245 "[Init] Executing _REG OpRegion methods\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Len Brown4be44fc2005-08-05 00:44:28 -0400247 status = acpi_ev_initialize_op_regions();
248 if (ACPI_FAILURE(status)) {
249 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
251 }
252
253 /*
Lin Ming7f0c8262009-08-13 14:03:15 +0800254 * 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
263 /*
Bob Moore96db2552005-11-02 00:00:00 -0500264 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 */
268 if (!(flags & ACPI_NO_OBJECT_INIT)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400269 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
270 "[Init] Completing Initialization of ACPI Objects\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Len Brown4be44fc2005-08-05 00:44:28 -0400272 status = acpi_ns_initialize_objects();
273 if (ACPI_FAILURE(status)) {
274 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 }
276 }
277
278 /*
Bob Moore96db2552005-11-02 00:00:00 -0500279 * Initialize all device objects in the namespace. This runs the device
280 * _STA and _INI methods.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 */
282 if (!(flags & ACPI_NO_DEVICE_INIT)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400283 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
284 "[Init] Initializing ACPI Devices\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Len Brown4be44fc2005-08-05 00:44:28 -0400286 status = acpi_ns_initialize_devices();
287 if (ACPI_FAILURE(status)) {
288 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 }
290 }
291
292 /*
Alexey Starikovskiy20447022008-03-11 17:17:08 -0400293 * Complete the GPE initialization for the GPE blocks defined in the FADT
294 * (GPE block 0 and 1).
295 *
296 * Note1: This is where the _PRW methods are executed for the GPEs. These
297 * methods can only be executed after the SCI and Global Lock handlers are
298 * installed and initialized.
299 *
300 * Note2: Currently, there seems to be no need to run the _REG methods
301 * before execution of the _PRW methods and enabling of the GPEs.
302 */
303 if (!(flags & ACPI_NO_EVENT_INIT)) {
304 status = acpi_ev_install_fadt_gpes();
305 if (ACPI_FAILURE(status))
306 return (status);
307 }
308
309 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 * Empty the caches (delete the cached objects) on the assumption that
311 * the table load filled them up more than they will be at runtime --
312 * thus wasting non-paged memory.
313 */
Len Brown4be44fc2005-08-05 00:44:28 -0400314 status = acpi_purge_cached_objects();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
Len Brown4be44fc2005-08-05 00:44:28 -0400317 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
Bob Moore83135242006-10-03 00:00:00 -0400320ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
321
Bob Mooree20a6792008-04-10 19:06:38 +0400322#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323/*******************************************************************************
324 *
325 * FUNCTION: acpi_terminate
326 *
327 * PARAMETERS: None
328 *
329 * RETURN: Status
330 *
Bob Moore2f977b32009-07-24 11:25:16 +0800331 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 *
333 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400334acpi_status acpi_terminate(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
Len Brown4be44fc2005-08-05 00:44:28 -0400336 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
Bob Mooreb229cf92006-04-21 17:15:00 -0400338 ACPI_FUNCTION_TRACE(acpi_terminate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Bob Moore2f977b32009-07-24 11:25:16 +0800340 /* Just exit if subsystem is already shutdown */
341
342 if (acpi_gbl_shutdown) {
343 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
344 return_ACPI_STATUS(AE_OK);
345 }
346
347 /* Subsystem appears active, go ahead and shut it down */
348
349 acpi_gbl_shutdown = TRUE;
350 acpi_gbl_startup_flags = 0;
351 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 /* Terminate the AML Debugger if present */
354
355 ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
356
357 /* Shutdown and free all resources */
358
Len Brown4be44fc2005-08-05 00:44:28 -0400359 acpi_ut_subsystem_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 /* Free the mutex objects */
362
Len Brown4be44fc2005-08-05 00:44:28 -0400363 acpi_ut_mutex_terminate();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365#ifdef ACPI_DEBUGGER
366
367 /* Shut down the debugger */
368
Len Brown4be44fc2005-08-05 00:44:28 -0400369 acpi_db_terminate();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370#endif
371
372 /* Now we can shutdown the OS-dependent layer */
373
Len Brown4be44fc2005-08-05 00:44:28 -0400374 status = acpi_os_terminate();
375 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376}
377
Bob Moore83135242006-10-03 00:00:00 -0400378ACPI_EXPORT_SYMBOL(acpi_terminate)
Bob Moore2f977b32009-07-24 11:25:16 +0800379
Bob Mooree20a6792008-04-10 19:06:38 +0400380#ifndef ACPI_ASL_COMPILER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381#ifdef ACPI_FUTURE_USAGE
Robert Moore44f6c012005-04-18 22:49:35 -0400382/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 *
384 * FUNCTION: acpi_subsystem_status
385 *
386 * PARAMETERS: None
387 *
388 * RETURN: Status of the ACPI subsystem
389 *
390 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
Robert Moore44f6c012005-04-18 22:49:35 -0400391 * before making any other calls, to ensure the subsystem
392 * initialized successfully.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 *
Robert Moore44f6c012005-04-18 22:49:35 -0400394 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400395acpi_status acpi_subsystem_status(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
Robert Moore44f6c012005-04-18 22:49:35 -0400397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
399 return (AE_OK);
Len Brown4be44fc2005-08-05 00:44:28 -0400400 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return (AE_ERROR);
402 }
403}
404
Bob Moore83135242006-10-03 00:00:00 -0400405ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
406
Robert Moore44f6c012005-04-18 22:49:35 -0400407/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 *
409 * FUNCTION: acpi_get_system_info
410 *
Robert Moore44f6c012005-04-18 22:49:35 -0400411 * PARAMETERS: out_buffer - A buffer to receive the resources for the
412 * device
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 *
414 * RETURN: Status - the status of the call
415 *
416 * DESCRIPTION: This function is called to get information about the current
417 * state of the ACPI subsystem. It will return system information
418 * in the out_buffer.
419 *
420 * If the function fails an appropriate status will be returned
421 * and the value of out_buffer is undefined.
422 *
423 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400424acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425{
Len Brown4be44fc2005-08-05 00:44:28 -0400426 struct acpi_system_info *info_ptr;
427 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Bob Mooreb229cf92006-04-21 17:15:00 -0400429 ACPI_FUNCTION_TRACE(acpi_get_system_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 /* Parameter validation */
432
Len Brown4be44fc2005-08-05 00:44:28 -0400433 status = acpi_ut_validate_buffer(out_buffer);
434 if (ACPI_FAILURE(status)) {
435 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
437
438 /* Validate/Allocate/Clear caller buffer */
439
Len Brown4be44fc2005-08-05 00:44:28 -0400440 status =
441 acpi_ut_initialize_buffer(out_buffer,
442 sizeof(struct acpi_system_info));
443 if (ACPI_FAILURE(status)) {
444 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 }
446
447 /*
448 * Populate the return buffer
449 */
Len Brown4be44fc2005-08-05 00:44:28 -0400450 info_ptr = (struct acpi_system_info *)out_buffer->pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Len Brown4be44fc2005-08-05 00:44:28 -0400452 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
454 /* System flags (ACPI capabilities) */
455
Len Brown4be44fc2005-08-05 00:44:28 -0400456 info_ptr->flags = ACPI_SYS_MODE_ACPI;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458 /* Timer resolution - 24 or 32 bits */
459
Bob Mooref3d2e782007-02-02 19:48:18 +0300460 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 info_ptr->timer_resolution = 24;
Len Brown4be44fc2005-08-05 00:44:28 -0400462 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 info_ptr->timer_resolution = 32;
464 }
465
466 /* Clear the reserved fields */
467
Len Brown4be44fc2005-08-05 00:44:28 -0400468 info_ptr->reserved1 = 0;
469 info_ptr->reserved2 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 /* Current debug levels */
472
Len Brown4be44fc2005-08-05 00:44:28 -0400473 info_ptr->debug_layer = acpi_dbg_layer;
474 info_ptr->debug_level = acpi_dbg_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Len Brown4be44fc2005-08-05 00:44:28 -0400476 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Bob Moore83135242006-10-03 00:00:00 -0400479ACPI_EXPORT_SYMBOL(acpi_get_system_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481/*****************************************************************************
482 *
483 * FUNCTION: acpi_install_initialization_handler
484 *
485 * PARAMETERS: Handler - Callback procedure
Robert Moore44f6c012005-04-18 22:49:35 -0400486 * Function - Not (currently) used, see below
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 *
488 * RETURN: Status
489 *
490 * DESCRIPTION: Install an initialization handler
491 *
492 * TBD: When a second function is added, must save the Function also.
493 *
494 ****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400496acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497{
498
499 if (!handler) {
500 return (AE_BAD_PARAMETER);
501 }
502
503 if (acpi_gbl_init_handler) {
504 return (AE_ALREADY_EXISTS);
505 }
506
507 acpi_gbl_init_handler = handler;
508 return AE_OK;
509}
510
Bob Moore83135242006-10-03 00:00:00 -0400511ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
Len Brown4be44fc2005-08-05 00:44:28 -0400512#endif /* ACPI_FUTURE_USAGE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513/*****************************************************************************
514 *
515 * FUNCTION: acpi_purge_cached_objects
516 *
517 * PARAMETERS: None
518 *
519 * RETURN: Status
520 *
521 * DESCRIPTION: Empty all caches (delete the cached objects)
522 *
523 ****************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400524acpi_status acpi_purge_cached_objects(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525{
Bob Mooreb229cf92006-04-21 17:15:00 -0400526 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Len Brown4be44fc2005-08-05 00:44:28 -0400528 (void)acpi_os_purge_cache(acpi_gbl_state_cache);
529 (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
530 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
531 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
532 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533}
Bob Moore83135242006-10-03 00:00:00 -0400534
535ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
Bob Mooree20a6792008-04-10 19:06:38 +0400536#endif