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diff --git a/drivers/acpi/utilities/utxface.c b/drivers/acpi/utilities/utxface.c
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1/******************************************************************************
2 *
3 * Module Name: utxface - External interfaces for "global" ACPI functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2008, Intel Corp.
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 <acpi/acpi.h>
45#include <acpi/acevents.h>
46#include <acpi/acnamesp.h>
47#include <acpi/acdebug.h>
48
49#define _COMPONENT ACPI_UTILITIES
50ACPI_MODULE_NAME("utxface")
51
52#ifndef ACPI_ASL_COMPILER
53/*******************************************************************************
54 *
55 * FUNCTION: acpi_initialize_subsystem
56 *
57 * PARAMETERS: None
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Initializes all global variables. This is the first function
62 * called, so any early initialization belongs here.
63 *
64 ******************************************************************************/
65acpi_status __init acpi_initialize_subsystem(void)
66{
67 acpi_status status;
68
69 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
70
71 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
72 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
73
74 /* Initialize the OS-Dependent layer */
75
76 status = acpi_os_initialize();
77 if (ACPI_FAILURE(status)) {
78 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
79 return_ACPI_STATUS(status);
80 }
81
82 /* Initialize all globals used by the subsystem */
83
84 status = acpi_ut_init_globals();
85 if (ACPI_FAILURE(status)) {
86 ACPI_EXCEPTION((AE_INFO, status,
87 "During initialization of globals"));
88 return_ACPI_STATUS(status);
89 }
90
91 /* Create the default mutex objects */
92
93 status = acpi_ut_mutex_initialize();
94 if (ACPI_FAILURE(status)) {
95 ACPI_EXCEPTION((AE_INFO, status,
96 "During Global Mutex creation"));
97 return_ACPI_STATUS(status);
98 }
99
100 /*
101 * Initialize the namespace manager and
102 * the root of the namespace tree
103 */
104 status = acpi_ns_root_initialize();
105 if (ACPI_FAILURE(status)) {
106 ACPI_EXCEPTION((AE_INFO, status,
107 "During Namespace initialization"));
108 return_ACPI_STATUS(status);
109 }
110
111 /* If configured, initialize the AML debugger */
112
113 ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
114 return_ACPI_STATUS(status);
115}
116
117/*******************************************************************************
118 *
119 * FUNCTION: acpi_enable_subsystem
120 *
121 * PARAMETERS: Flags - Init/enable Options
122 *
123 * RETURN: Status
124 *
125 * DESCRIPTION: Completes the subsystem initialization including hardware.
126 * Puts system into ACPI mode if it isn't already.
127 *
128 ******************************************************************************/
129acpi_status acpi_enable_subsystem(u32 flags)
130{
131 acpi_status status = AE_OK;
132
133 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
134
135 /* Enable ACPI mode */
136
137 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
138 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
139 "[Init] Going into ACPI mode\n"));
140
141 acpi_gbl_original_mode = acpi_hw_get_mode();
142
143 status = acpi_enable();
144 if (ACPI_FAILURE(status)) {
145 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
146 return_ACPI_STATUS(status);
147 }
148 }
149
150 /*
151 * Install the default op_region handlers. These are installed unless
152 * other handlers have already been installed via the
153 * install_address_space_handler interface.
154 */
155 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
156 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
157 "[Init] Installing default address space handlers\n"));
158
159 status = acpi_ev_install_region_handlers();
160 if (ACPI_FAILURE(status)) {
161 return_ACPI_STATUS(status);
162 }
163 }
164
165 /*
166 * Initialize ACPI Event handling (Fixed and General Purpose)
167 *
168 * Note1: We must have the hardware and events initialized before we can
169 * execute any control methods safely. Any control method can require
170 * ACPI hardware support, so the hardware must be fully initialized before
171 * any method execution!
172 *
173 * Note2: Fixed events are initialized and enabled here. GPEs are
174 * initialized, but cannot be enabled until after the hardware is
175 * completely initialized (SCI and global_lock activated)
176 */
177 if (!(flags & ACPI_NO_EVENT_INIT)) {
178 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
179 "[Init] Initializing ACPI events\n"));
180
181 status = acpi_ev_initialize_events();
182 if (ACPI_FAILURE(status)) {
183 return_ACPI_STATUS(status);
184 }
185 }
186
187 /*
188 * Install the SCI handler and Global Lock handler. This completes the
189 * hardware initialization.
190 */
191 if (!(flags & ACPI_NO_HANDLER_INIT)) {
192 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
193 "[Init] Installing SCI/GL handlers\n"));
194
195 status = acpi_ev_install_xrupt_handlers();
196 if (ACPI_FAILURE(status)) {
197 return_ACPI_STATUS(status);
198 }
199 }
200
201 return_ACPI_STATUS(status);
202}
203
204ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
205
206/*******************************************************************************
207 *
208 * FUNCTION: acpi_initialize_objects
209 *
210 * PARAMETERS: Flags - Init/enable Options
211 *
212 * RETURN: Status
213 *
214 * DESCRIPTION: Completes namespace initialization by initializing device
215 * objects and executing AML code for Regions, buffers, etc.
216 *
217 ******************************************************************************/
218acpi_status acpi_initialize_objects(u32 flags)
219{
220 acpi_status status = AE_OK;
221
222 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
223
224 /*
225 * Run all _REG methods
226 *
227 * Note: Any objects accessed by the _REG methods will be automatically
228 * initialized, even if they contain executable AML (see the call to
229 * acpi_ns_initialize_objects below).
230 */
231 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
232 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
233 "[Init] Executing _REG OpRegion methods\n"));
234
235 status = acpi_ev_initialize_op_regions();
236 if (ACPI_FAILURE(status)) {
237 return_ACPI_STATUS(status);
238 }
239 }
240
241 /*
242 * Initialize the objects that remain uninitialized. This runs the
243 * executable AML that may be part of the declaration of these objects:
244 * operation_regions, buffer_fields, Buffers, and Packages.
245 */
246 if (!(flags & ACPI_NO_OBJECT_INIT)) {
247 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
248 "[Init] Completing Initialization of ACPI Objects\n"));
249
250 status = acpi_ns_initialize_objects();
251 if (ACPI_FAILURE(status)) {
252 return_ACPI_STATUS(status);
253 }
254 }
255
256 /*
257 * Initialize all device objects in the namespace. This runs the device
258 * _STA and _INI methods.
259 */
260 if (!(flags & ACPI_NO_DEVICE_INIT)) {
261 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
262 "[Init] Initializing ACPI Devices\n"));
263
264 status = acpi_ns_initialize_devices();
265 if (ACPI_FAILURE(status)) {
266 return_ACPI_STATUS(status);
267 }
268 }
269
270 /*
271 * Complete the GPE initialization for the GPE blocks defined in the FADT
272 * (GPE block 0 and 1).
273 *
274 * Note1: This is where the _PRW methods are executed for the GPEs. These
275 * methods can only be executed after the SCI and Global Lock handlers are
276 * installed and initialized.
277 *
278 * Note2: Currently, there seems to be no need to run the _REG methods
279 * before execution of the _PRW methods and enabling of the GPEs.
280 */
281 if (!(flags & ACPI_NO_EVENT_INIT)) {
282 status = acpi_ev_install_fadt_gpes();
283 if (ACPI_FAILURE(status))
284 return (status);
285 }
286
287 /*
288 * Empty the caches (delete the cached objects) on the assumption that
289 * the table load filled them up more than they will be at runtime --
290 * thus wasting non-paged memory.
291 */
292 status = acpi_purge_cached_objects();
293
294 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
295 return_ACPI_STATUS(status);
296}
297
298ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
299
300#endif
301/*******************************************************************************
302 *
303 * FUNCTION: acpi_terminate
304 *
305 * PARAMETERS: None
306 *
307 * RETURN: Status
308 *
309 * DESCRIPTION: Shutdown the ACPI subsystem. Release all resources.
310 *
311 ******************************************************************************/
312acpi_status acpi_terminate(void)
313{
314 acpi_status status;
315
316 ACPI_FUNCTION_TRACE(acpi_terminate);
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 /* Free the mutex objects */
327
328 acpi_ut_mutex_terminate();
329
330#ifdef ACPI_DEBUGGER
331
332 /* Shut down the debugger */
333
334 acpi_db_terminate();
335#endif
336
337 /* Now we can shutdown the OS-dependent layer */
338
339 status = acpi_os_terminate();
340 return_ACPI_STATUS(status);
341}
342
343ACPI_EXPORT_SYMBOL(acpi_terminate)
344#ifndef ACPI_ASL_COMPILER
345#ifdef ACPI_FUTURE_USAGE
346/*******************************************************************************
347 *
348 * FUNCTION: acpi_subsystem_status
349 *
350 * PARAMETERS: None
351 *
352 * RETURN: Status of the ACPI subsystem
353 *
354 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
355 * before making any other calls, to ensure the subsystem
356 * initialized successfully.
357 *
358 ******************************************************************************/
359acpi_status acpi_subsystem_status(void)
360{
361
362 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
363 return (AE_OK);
364 } else {
365 return (AE_ERROR);
366 }
367}
368
369ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
370
371/*******************************************************************************
372 *
373 * FUNCTION: acpi_get_system_info
374 *
375 * PARAMETERS: out_buffer - A buffer to receive the resources for the
376 * device
377 *
378 * RETURN: Status - the status of the call
379 *
380 * DESCRIPTION: This function is called to get information about the current
381 * state of the ACPI subsystem. It will return system information
382 * in the out_buffer.
383 *
384 * If the function fails an appropriate status will be returned
385 * and the value of out_buffer is undefined.
386 *
387 ******************************************************************************/
388acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
389{
390 struct acpi_system_info *info_ptr;
391 acpi_status status;
392
393 ACPI_FUNCTION_TRACE(acpi_get_system_info);
394
395 /* Parameter validation */
396
397 status = acpi_ut_validate_buffer(out_buffer);
398 if (ACPI_FAILURE(status)) {
399 return_ACPI_STATUS(status);
400 }
401
402 /* Validate/Allocate/Clear caller buffer */
403
404 status =
405 acpi_ut_initialize_buffer(out_buffer,
406 sizeof(struct acpi_system_info));
407 if (ACPI_FAILURE(status)) {
408 return_ACPI_STATUS(status);
409 }
410
411 /*
412 * Populate the return buffer
413 */
414 info_ptr = (struct acpi_system_info *)out_buffer->pointer;
415
416 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
417
418 /* System flags (ACPI capabilities) */
419
420 info_ptr->flags = ACPI_SYS_MODE_ACPI;
421
422 /* Timer resolution - 24 or 32 bits */
423
424 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
425 info_ptr->timer_resolution = 24;
426 } else {
427 info_ptr->timer_resolution = 32;
428 }
429
430 /* Clear the reserved fields */
431
432 info_ptr->reserved1 = 0;
433 info_ptr->reserved2 = 0;
434
435 /* Current debug levels */
436
437 info_ptr->debug_layer = acpi_dbg_layer;
438 info_ptr->debug_level = acpi_dbg_level;
439
440 return_ACPI_STATUS(AE_OK);
441}
442
443ACPI_EXPORT_SYMBOL(acpi_get_system_info)
444
445/*****************************************************************************
446 *
447 * FUNCTION: acpi_install_initialization_handler
448 *
449 * PARAMETERS: Handler - Callback procedure
450 * Function - Not (currently) used, see below
451 *
452 * RETURN: Status
453 *
454 * DESCRIPTION: Install an initialization handler
455 *
456 * TBD: When a second function is added, must save the Function also.
457 *
458 ****************************************************************************/
459acpi_status
460acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
461{
462
463 if (!handler) {
464 return (AE_BAD_PARAMETER);
465 }
466
467 if (acpi_gbl_init_handler) {
468 return (AE_ALREADY_EXISTS);
469 }
470
471 acpi_gbl_init_handler = handler;
472 return AE_OK;
473}
474
475ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
476#endif /* ACPI_FUTURE_USAGE */
477/*****************************************************************************
478 *
479 * FUNCTION: acpi_purge_cached_objects
480 *
481 * PARAMETERS: None
482 *
483 * RETURN: Status
484 *
485 * DESCRIPTION: Empty all caches (delete the cached objects)
486 *
487 ****************************************************************************/
488acpi_status acpi_purge_cached_objects(void)
489{
490 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
491
492 (void)acpi_os_purge_cache(acpi_gbl_state_cache);
493 (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
494 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
495 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
496 return_ACPI_STATUS(AE_OK);
497}
498
499ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
500#endif
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