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1/******************************************************************************
2 *
3 * Module Name: utxface - External interfaces for "global" ACPI functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, 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 "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
48#include "acdebug.h"
49#include "actables.h"
50
51#define _COMPONENT ACPI_UTILITIES
52ACPI_MODULE_NAME("utxface")
53
54#ifndef ACPI_ASL_COMPILER
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 ******************************************************************************/
67acpi_status __init acpi_initialize_subsystem(void)
68{
69 acpi_status status;
70
71 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
72
73 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
74 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
75
76 /* Initialize the OS-Dependent layer */
77
78 status = acpi_os_initialize();
79 if (ACPI_FAILURE(status)) {
80 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
81 return_ACPI_STATUS(status);
82 }
83
84 /* Initialize all globals used by the subsystem */
85
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 }
92
93 /* Create the default mutex objects */
94
95 status = acpi_ut_mutex_initialize();
96 if (ACPI_FAILURE(status)) {
97 ACPI_EXCEPTION((AE_INFO, status,
98 "During Global Mutex creation"));
99 return_ACPI_STATUS(status);
100 }
101
102 /*
103 * Initialize the namespace manager and
104 * the root of the namespace tree
105 */
106 status = acpi_ns_root_initialize();
107 if (ACPI_FAILURE(status)) {
108 ACPI_EXCEPTION((AE_INFO, status,
109 "During Namespace initialization"));
110 return_ACPI_STATUS(status);
111 }
112
113 /* Initialize the global OSI interfaces list with the static names */
114
115 status = acpi_ut_initialize_interfaces();
116 if (ACPI_FAILURE(status)) {
117 ACPI_EXCEPTION((AE_INFO, status,
118 "During OSI interfaces initialization"));
119 return_ACPI_STATUS(status);
120 }
121
122 /* If configured, initialize the AML debugger */
123
124 ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
125 return_ACPI_STATUS(status);
126}
127
128/*******************************************************************************
129 *
130 * FUNCTION: acpi_enable_subsystem
131 *
132 * PARAMETERS: Flags - Init/enable Options
133 *
134 * RETURN: Status
135 *
136 * DESCRIPTION: Completes the subsystem initialization including hardware.
137 * Puts system into ACPI mode if it isn't already.
138 *
139 ******************************************************************************/
140acpi_status acpi_enable_subsystem(u32 flags)
141{
142 acpi_status status = AE_OK;
143
144 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
145
146 /* Enable ACPI mode */
147
148 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
149 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
150 "[Init] Going into ACPI mode\n"));
151
152 acpi_gbl_original_mode = acpi_hw_get_mode();
153
154 status = acpi_enable();
155 if (ACPI_FAILURE(status)) {
156 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
157 return_ACPI_STATUS(status);
158 }
159 }
160
161 /*
162 * Obtain a permanent mapping for the FACS. This is required for the
163 * Global Lock and the Firmware Waking Vector
164 */
165 status = acpi_tb_initialize_facs();
166 if (ACPI_FAILURE(status)) {
167 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
168 return_ACPI_STATUS(status);
169 }
170
171 /*
172 * Install the default op_region handlers. These are installed unless
173 * other handlers have already been installed via the
174 * install_address_space_handler interface.
175 */
176 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
177 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
178 "[Init] Installing default address space handlers\n"));
179
180 status = acpi_ev_install_region_handlers();
181 if (ACPI_FAILURE(status)) {
182 return_ACPI_STATUS(status);
183 }
184 }
185
186 /*
187 * Initialize ACPI Event handling (Fixed and General Purpose)
188 *
189 * Note1: We must have the hardware and events initialized before we can
190 * execute any control methods safely. Any control method can require
191 * ACPI hardware support, so the hardware must be fully initialized before
192 * any method execution!
193 *
194 * Note2: Fixed events are initialized and enabled here. GPEs are
195 * initialized, but cannot be enabled until after the hardware is
196 * completely initialized (SCI and global_lock activated)
197 */
198 if (!(flags & ACPI_NO_EVENT_INIT)) {
199 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
200 "[Init] Initializing ACPI events\n"));
201
202 status = acpi_ev_initialize_events();
203 if (ACPI_FAILURE(status)) {
204 return_ACPI_STATUS(status);
205 }
206 }
207
208 /*
209 * Install the SCI handler and Global Lock handler. This completes the
210 * hardware initialization.
211 */
212 if (!(flags & ACPI_NO_HANDLER_INIT)) {
213 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
214 "[Init] Installing SCI/GL handlers\n"));
215
216 status = acpi_ev_install_xrupt_handlers();
217 if (ACPI_FAILURE(status)) {
218 return_ACPI_STATUS(status);
219 }
220 }
221
222 return_ACPI_STATUS(status);
223}
224
225ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
226
227/*******************************************************************************
228 *
229 * FUNCTION: acpi_initialize_objects
230 *
231 * PARAMETERS: Flags - Init/enable Options
232 *
233 * RETURN: Status
234 *
235 * DESCRIPTION: Completes namespace initialization by initializing device
236 * objects and executing AML code for Regions, buffers, etc.
237 *
238 ******************************************************************************/
239acpi_status acpi_initialize_objects(u32 flags)
240{
241 acpi_status status = AE_OK;
242
243 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
244
245 /*
246 * Run all _REG methods
247 *
248 * Note: Any objects accessed by the _REG methods will be automatically
249 * initialized, even if they contain executable AML (see the call to
250 * acpi_ns_initialize_objects below).
251 */
252 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
253 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
254 "[Init] Executing _REG OpRegion methods\n"));
255
256 status = acpi_ev_initialize_op_regions();
257 if (ACPI_FAILURE(status)) {
258 return_ACPI_STATUS(status);
259 }
260 }
261
262 /*
263 * Execute any module-level code that was detected during the table load
264 * phase. Although illegal since ACPI 2.0, there are many machines that
265 * contain this type of code. Each block of detected executable AML code
266 * outside of any control method is wrapped with a temporary control
267 * method object and placed on a global list. The methods on this list
268 * are executed below.
269 */
270 acpi_ns_exec_module_code_list();
271
272 /*
273 * Initialize the objects that remain uninitialized. This runs the
274 * executable AML that may be part of the declaration of these objects:
275 * operation_regions, buffer_fields, Buffers, and Packages.
276 */
277 if (!(flags & ACPI_NO_OBJECT_INIT)) {
278 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
279 "[Init] Completing Initialization of ACPI Objects\n"));
280
281 status = acpi_ns_initialize_objects();
282 if (ACPI_FAILURE(status)) {
283 return_ACPI_STATUS(status);
284 }
285 }
286
287 /*
288 * Initialize all device objects in the namespace. This runs the device
289 * _STA and _INI methods.
290 */
291 if (!(flags & ACPI_NO_DEVICE_INIT)) {
292 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
293 "[Init] Initializing ACPI Devices\n"));
294
295 status = acpi_ns_initialize_devices();
296 if (ACPI_FAILURE(status)) {
297 return_ACPI_STATUS(status);
298 }
299 }
300
301 /*
302 * Empty the caches (delete the cached objects) on the assumption that
303 * the table load filled them up more than they will be at runtime --
304 * thus wasting non-paged memory.
305 */
306 status = acpi_purge_cached_objects();
307
308 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
309 return_ACPI_STATUS(status);
310}
311
312ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
313
314#endif
315/*******************************************************************************
316 *
317 * FUNCTION: acpi_terminate
318 *
319 * PARAMETERS: None
320 *
321 * RETURN: Status
322 *
323 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
324 *
325 ******************************************************************************/
326acpi_status acpi_terminate(void)
327{
328 acpi_status status;
329
330 ACPI_FUNCTION_TRACE(acpi_terminate);
331
332 /* Just exit if subsystem is already shutdown */
333
334 if (acpi_gbl_shutdown) {
335 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
336 return_ACPI_STATUS(AE_OK);
337 }
338
339 /* Subsystem appears active, go ahead and shut it down */
340
341 acpi_gbl_shutdown = TRUE;
342 acpi_gbl_startup_flags = 0;
343 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
344
345 /* Terminate the AML Debugger if present */
346
347 ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
348
349 /* Shutdown and free all resources */
350
351 acpi_ut_subsystem_shutdown();
352
353 /* Free the mutex objects */
354
355 acpi_ut_mutex_terminate();
356
357#ifdef ACPI_DEBUGGER
358
359 /* Shut down the debugger */
360
361 acpi_db_terminate();
362#endif
363
364 /* Now we can shutdown the OS-dependent layer */
365
366 status = acpi_os_terminate();
367 return_ACPI_STATUS(status);
368}
369
370ACPI_EXPORT_SYMBOL(acpi_terminate)
371
372#ifndef ACPI_ASL_COMPILER
373#ifdef ACPI_FUTURE_USAGE
374/*******************************************************************************
375 *
376 * FUNCTION: acpi_subsystem_status
377 *
378 * PARAMETERS: None
379 *
380 * RETURN: Status of the ACPI subsystem
381 *
382 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
383 * before making any other calls, to ensure the subsystem
384 * initialized successfully.
385 *
386 ******************************************************************************/
387acpi_status acpi_subsystem_status(void)
388{
389
390 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
391 return (AE_OK);
392 } else {
393 return (AE_ERROR);
394 }
395}
396
397ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
398
399/*******************************************************************************
400 *
401 * FUNCTION: acpi_get_system_info
402 *
403 * PARAMETERS: out_buffer - A buffer to receive the resources for the
404 * device
405 *
406 * RETURN: Status - the status of the call
407 *
408 * DESCRIPTION: This function is called to get information about the current
409 * state of the ACPI subsystem. It will return system information
410 * in the out_buffer.
411 *
412 * If the function fails an appropriate status will be returned
413 * and the value of out_buffer is undefined.
414 *
415 ******************************************************************************/
416acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
417{
418 struct acpi_system_info *info_ptr;
419 acpi_status status;
420
421 ACPI_FUNCTION_TRACE(acpi_get_system_info);
422
423 /* Parameter validation */
424
425 status = acpi_ut_validate_buffer(out_buffer);
426 if (ACPI_FAILURE(status)) {
427 return_ACPI_STATUS(status);
428 }
429
430 /* Validate/Allocate/Clear caller buffer */
431
432 status =
433 acpi_ut_initialize_buffer(out_buffer,
434 sizeof(struct acpi_system_info));
435 if (ACPI_FAILURE(status)) {
436 return_ACPI_STATUS(status);
437 }
438
439 /*
440 * Populate the return buffer
441 */
442 info_ptr = (struct acpi_system_info *)out_buffer->pointer;
443
444 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
445
446 /* System flags (ACPI capabilities) */
447
448 info_ptr->flags = ACPI_SYS_MODE_ACPI;
449
450 /* Timer resolution - 24 or 32 bits */
451
452 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
453 info_ptr->timer_resolution = 24;
454 } else {
455 info_ptr->timer_resolution = 32;
456 }
457
458 /* Clear the reserved fields */
459
460 info_ptr->reserved1 = 0;
461 info_ptr->reserved2 = 0;
462
463 /* Current debug levels */
464
465 info_ptr->debug_layer = acpi_dbg_layer;
466 info_ptr->debug_level = acpi_dbg_level;
467
468 return_ACPI_STATUS(AE_OK);
469}
470
471ACPI_EXPORT_SYMBOL(acpi_get_system_info)
472
473/*****************************************************************************
474 *
475 * FUNCTION: acpi_install_initialization_handler
476 *
477 * PARAMETERS: Handler - Callback procedure
478 * Function - Not (currently) used, see below
479 *
480 * RETURN: Status
481 *
482 * DESCRIPTION: Install an initialization handler
483 *
484 * TBD: When a second function is added, must save the Function also.
485 *
486 ****************************************************************************/
487acpi_status
488acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
489{
490
491 if (!handler) {
492 return (AE_BAD_PARAMETER);
493 }
494
495 if (acpi_gbl_init_handler) {
496 return (AE_ALREADY_EXISTS);
497 }
498
499 acpi_gbl_init_handler = handler;
500 return AE_OK;
501}
502
503ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
504#endif /* ACPI_FUTURE_USAGE */
505
506/*****************************************************************************
507 *
508 * FUNCTION: acpi_purge_cached_objects
509 *
510 * PARAMETERS: None
511 *
512 * RETURN: Status
513 *
514 * DESCRIPTION: Empty all caches (delete the cached objects)
515 *
516 ****************************************************************************/
517acpi_status acpi_purge_cached_objects(void)
518{
519 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
520
521 (void)acpi_os_purge_cache(acpi_gbl_state_cache);
522 (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
523 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
524 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
525 return_ACPI_STATUS(AE_OK);
526}
527
528ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
529
530/*****************************************************************************
531 *
532 * FUNCTION: acpi_install_interface
533 *
534 * PARAMETERS: interface_name - The interface to install
535 *
536 * RETURN: Status
537 *
538 * DESCRIPTION: Install an _OSI interface to the global list
539 *
540 ****************************************************************************/
541acpi_status acpi_install_interface(acpi_string interface_name)
542{
543 acpi_status status;
544 struct acpi_interface_info *interface_info;
545
546 /* Parameter validation */
547
548 if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
549 return (AE_BAD_PARAMETER);
550 }
551
552 (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
553
554 /* Check if the interface name is already in the global list */
555
556 interface_info = acpi_ut_get_interface(interface_name);
557 if (interface_info) {
558 /*
559 * The interface already exists in the list. This is OK if the
560 * interface has been marked invalid -- just clear the bit.
561 */
562 if (interface_info->flags & ACPI_OSI_INVALID) {
563 interface_info->flags &= ~ACPI_OSI_INVALID;
564 status = AE_OK;
565 } else {
566 status = AE_ALREADY_EXISTS;
567 }
568 } else {
569 /* New interface name, install into the global list */
570
571 status = acpi_ut_install_interface(interface_name);
572 }
573
574 acpi_os_release_mutex(acpi_gbl_osi_mutex);
575 return (status);
576}
577
578ACPI_EXPORT_SYMBOL(acpi_install_interface)
579
580/*****************************************************************************
581 *
582 * FUNCTION: acpi_remove_interface
583 *
584 * PARAMETERS: interface_name - The interface to remove
585 *
586 * RETURN: Status
587 *
588 * DESCRIPTION: Remove an _OSI interface from the global list
589 *
590 ****************************************************************************/
591acpi_status acpi_remove_interface(acpi_string interface_name)
592{
593 acpi_status status;
594
595 /* Parameter validation */
596
597 if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
598 return (AE_BAD_PARAMETER);
599 }
600
601 (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
602
603 status = acpi_ut_remove_interface(interface_name);
604
605 acpi_os_release_mutex(acpi_gbl_osi_mutex);
606 return (status);
607}
608
609ACPI_EXPORT_SYMBOL(acpi_remove_interface)
610
611/*****************************************************************************
612 *
613 * FUNCTION: acpi_install_interface_handler
614 *
615 * PARAMETERS: Handler - The _OSI interface handler to install
616 * NULL means "remove existing handler"
617 *
618 * RETURN: Status
619 *
620 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
621 * invoked during execution of the internal implementation of
622 * _OSI. A NULL handler simply removes any existing handler.
623 *
624 ****************************************************************************/
625acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
626{
627 acpi_status status = AE_OK;
628
629 (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
630
631 if (handler && acpi_gbl_interface_handler) {
632 status = AE_ALREADY_EXISTS;
633 } else {
634 acpi_gbl_interface_handler = handler;
635 }
636
637 acpi_os_release_mutex(acpi_gbl_osi_mutex);
638 return (status);
639}
640
641ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
642#endif /* !ACPI_ASL_COMPILER */
1/******************************************************************************
2 *
3 * Module Name: utxface - External interfaces, miscellaneous utility functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2014, 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#define EXPORT_ACPI_INTERFACES
45
46#include <acpi/acpi.h>
47#include "accommon.h"
48#include "acdebug.h"
49
50#define _COMPONENT ACPI_UTILITIES
51ACPI_MODULE_NAME("utxface")
52
53/*******************************************************************************
54 *
55 * FUNCTION: acpi_terminate
56 *
57 * PARAMETERS: None
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
62 *
63 ******************************************************************************/
64acpi_status __init acpi_terminate(void)
65{
66 acpi_status status;
67
68 ACPI_FUNCTION_TRACE(acpi_terminate);
69
70 /* Just exit if subsystem is already shutdown */
71
72 if (acpi_gbl_shutdown) {
73 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
74 return_ACPI_STATUS(AE_OK);
75 }
76
77 /* Subsystem appears active, go ahead and shut it down */
78
79 acpi_gbl_shutdown = TRUE;
80 acpi_gbl_startup_flags = 0;
81 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
82
83 /* Terminate the AML Debugger if present */
84
85 ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
86
87 /* Shutdown and free all resources */
88
89 acpi_ut_subsystem_shutdown();
90
91 /* Free the mutex objects */
92
93 acpi_ut_mutex_terminate();
94
95#ifdef ACPI_DEBUGGER
96
97 /* Shut down the debugger */
98
99 acpi_db_terminate();
100#endif
101
102 /* Now we can shutdown the OS-dependent layer */
103
104 status = acpi_os_terminate();
105 return_ACPI_STATUS(status);
106}
107
108ACPI_EXPORT_SYMBOL_INIT(acpi_terminate)
109
110#ifndef ACPI_ASL_COMPILER
111#ifdef ACPI_FUTURE_USAGE
112/*******************************************************************************
113 *
114 * FUNCTION: acpi_subsystem_status
115 *
116 * PARAMETERS: None
117 *
118 * RETURN: Status of the ACPI subsystem
119 *
120 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
121 * before making any other calls, to ensure the subsystem
122 * initialized successfully.
123 *
124 ******************************************************************************/
125acpi_status acpi_subsystem_status(void)
126{
127
128 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
129 return (AE_OK);
130 } else {
131 return (AE_ERROR);
132 }
133}
134
135ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
136
137/*******************************************************************************
138 *
139 * FUNCTION: acpi_get_system_info
140 *
141 * PARAMETERS: out_buffer - A buffer to receive the resources for the
142 * device
143 *
144 * RETURN: status - the status of the call
145 *
146 * DESCRIPTION: This function is called to get information about the current
147 * state of the ACPI subsystem. It will return system information
148 * in the out_buffer.
149 *
150 * If the function fails an appropriate status will be returned
151 * and the value of out_buffer is undefined.
152 *
153 ******************************************************************************/
154acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
155{
156 struct acpi_system_info *info_ptr;
157 acpi_status status;
158
159 ACPI_FUNCTION_TRACE(acpi_get_system_info);
160
161 /* Parameter validation */
162
163 status = acpi_ut_validate_buffer(out_buffer);
164 if (ACPI_FAILURE(status)) {
165 return_ACPI_STATUS(status);
166 }
167
168 /* Validate/Allocate/Clear caller buffer */
169
170 status =
171 acpi_ut_initialize_buffer(out_buffer,
172 sizeof(struct acpi_system_info));
173 if (ACPI_FAILURE(status)) {
174 return_ACPI_STATUS(status);
175 }
176
177 /*
178 * Populate the return buffer
179 */
180 info_ptr = (struct acpi_system_info *)out_buffer->pointer;
181
182 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
183
184 /* System flags (ACPI capabilities) */
185
186 info_ptr->flags = ACPI_SYS_MODE_ACPI;
187
188 /* Timer resolution - 24 or 32 bits */
189
190 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
191 info_ptr->timer_resolution = 24;
192 } else {
193 info_ptr->timer_resolution = 32;
194 }
195
196 /* Clear the reserved fields */
197
198 info_ptr->reserved1 = 0;
199 info_ptr->reserved2 = 0;
200
201 /* Current debug levels */
202
203 info_ptr->debug_layer = acpi_dbg_layer;
204 info_ptr->debug_level = acpi_dbg_level;
205
206 return_ACPI_STATUS(AE_OK);
207}
208
209ACPI_EXPORT_SYMBOL(acpi_get_system_info)
210
211/*******************************************************************************
212 *
213 * FUNCTION: acpi_get_statistics
214 *
215 * PARAMETERS: stats - Where the statistics are returned
216 *
217 * RETURN: status - the status of the call
218 *
219 * DESCRIPTION: Get the contents of the various system counters
220 *
221 ******************************************************************************/
222acpi_status acpi_get_statistics(struct acpi_statistics *stats)
223{
224 ACPI_FUNCTION_TRACE(acpi_get_statistics);
225
226 /* Parameter validation */
227
228 if (!stats) {
229 return_ACPI_STATUS(AE_BAD_PARAMETER);
230 }
231
232 /* Various interrupt-based event counters */
233
234 stats->sci_count = acpi_sci_count;
235 stats->gpe_count = acpi_gpe_count;
236
237 ACPI_MEMCPY(stats->fixed_event_count, acpi_fixed_event_count,
238 sizeof(acpi_fixed_event_count));
239
240 /* Other counters */
241
242 stats->method_count = acpi_method_count;
243
244 return_ACPI_STATUS(AE_OK);
245}
246
247ACPI_EXPORT_SYMBOL(acpi_get_statistics)
248
249/*****************************************************************************
250 *
251 * FUNCTION: acpi_install_initialization_handler
252 *
253 * PARAMETERS: handler - Callback procedure
254 * function - Not (currently) used, see below
255 *
256 * RETURN: Status
257 *
258 * DESCRIPTION: Install an initialization handler
259 *
260 * TBD: When a second function is added, must save the Function also.
261 *
262 ****************************************************************************/
263acpi_status
264acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
265{
266
267 if (!handler) {
268 return (AE_BAD_PARAMETER);
269 }
270
271 if (acpi_gbl_init_handler) {
272 return (AE_ALREADY_EXISTS);
273 }
274
275 acpi_gbl_init_handler = handler;
276 return (AE_OK);
277}
278
279ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
280#endif /* ACPI_FUTURE_USAGE */
281
282/*****************************************************************************
283 *
284 * FUNCTION: acpi_purge_cached_objects
285 *
286 * PARAMETERS: None
287 *
288 * RETURN: Status
289 *
290 * DESCRIPTION: Empty all caches (delete the cached objects)
291 *
292 ****************************************************************************/
293acpi_status acpi_purge_cached_objects(void)
294{
295 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
296
297 (void)acpi_os_purge_cache(acpi_gbl_state_cache);
298 (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
299 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
300 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
301
302 return_ACPI_STATUS(AE_OK);
303}
304
305ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
306
307/*****************************************************************************
308 *
309 * FUNCTION: acpi_install_interface
310 *
311 * PARAMETERS: interface_name - The interface to install
312 *
313 * RETURN: Status
314 *
315 * DESCRIPTION: Install an _OSI interface to the global list
316 *
317 ****************************************************************************/
318acpi_status acpi_install_interface(acpi_string interface_name)
319{
320 acpi_status status;
321 struct acpi_interface_info *interface_info;
322
323 /* Parameter validation */
324
325 if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
326 return (AE_BAD_PARAMETER);
327 }
328
329 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
330 if (ACPI_FAILURE(status)) {
331 return (status);
332 }
333
334 /* Check if the interface name is already in the global list */
335
336 interface_info = acpi_ut_get_interface(interface_name);
337 if (interface_info) {
338 /*
339 * The interface already exists in the list. This is OK if the
340 * interface has been marked invalid -- just clear the bit.
341 */
342 if (interface_info->flags & ACPI_OSI_INVALID) {
343 interface_info->flags &= ~ACPI_OSI_INVALID;
344 status = AE_OK;
345 } else {
346 status = AE_ALREADY_EXISTS;
347 }
348 } else {
349 /* New interface name, install into the global list */
350
351 status = acpi_ut_install_interface(interface_name);
352 }
353
354 acpi_os_release_mutex(acpi_gbl_osi_mutex);
355 return (status);
356}
357
358ACPI_EXPORT_SYMBOL(acpi_install_interface)
359
360/*****************************************************************************
361 *
362 * FUNCTION: acpi_remove_interface
363 *
364 * PARAMETERS: interface_name - The interface to remove
365 *
366 * RETURN: Status
367 *
368 * DESCRIPTION: Remove an _OSI interface from the global list
369 *
370 ****************************************************************************/
371acpi_status acpi_remove_interface(acpi_string interface_name)
372{
373 acpi_status status;
374
375 /* Parameter validation */
376
377 if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
378 return (AE_BAD_PARAMETER);
379 }
380
381 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
382 if (ACPI_FAILURE(status)) {
383 return (status);
384 }
385
386 status = acpi_ut_remove_interface(interface_name);
387
388 acpi_os_release_mutex(acpi_gbl_osi_mutex);
389 return (status);
390}
391
392ACPI_EXPORT_SYMBOL(acpi_remove_interface)
393
394/*****************************************************************************
395 *
396 * FUNCTION: acpi_install_interface_handler
397 *
398 * PARAMETERS: handler - The _OSI interface handler to install
399 * NULL means "remove existing handler"
400 *
401 * RETURN: Status
402 *
403 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
404 * invoked during execution of the internal implementation of
405 * _OSI. A NULL handler simply removes any existing handler.
406 *
407 ****************************************************************************/
408acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
409{
410 acpi_status status;
411
412 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
413 if (ACPI_FAILURE(status)) {
414 return (status);
415 }
416
417 if (handler && acpi_gbl_interface_handler) {
418 status = AE_ALREADY_EXISTS;
419 } else {
420 acpi_gbl_interface_handler = handler;
421 }
422
423 acpi_os_release_mutex(acpi_gbl_osi_mutex);
424 return (status);
425}
426
427ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
428
429/*****************************************************************************
430 *
431 * FUNCTION: acpi_update_interfaces
432 *
433 * PARAMETERS: action - Actions to be performed during the
434 * update
435 *
436 * RETURN: Status
437 *
438 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
439 * string or/and feature group strings.
440 *
441 ****************************************************************************/
442acpi_status acpi_update_interfaces(u8 action)
443{
444 acpi_status status;
445
446 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
447 if (ACPI_FAILURE(status)) {
448 return (status);
449 }
450
451 status = acpi_ut_update_interfaces(action);
452
453 acpi_os_release_mutex(acpi_gbl_osi_mutex);
454 return (status);
455}
456
457/*****************************************************************************
458 *
459 * FUNCTION: acpi_check_address_range
460 *
461 * PARAMETERS: space_id - Address space ID
462 * address - Start address
463 * length - Length
464 * warn - TRUE if warning on overlap desired
465 *
466 * RETURN: Count of the number of conflicts detected.
467 *
468 * DESCRIPTION: Check if the input address range overlaps any of the
469 * ASL operation region address ranges.
470 *
471 ****************************************************************************/
472
473u32
474acpi_check_address_range(acpi_adr_space_type space_id,
475 acpi_physical_address address,
476 acpi_size length, u8 warn)
477{
478 u32 overlaps;
479 acpi_status status;
480
481 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
482 if (ACPI_FAILURE(status)) {
483 return (0);
484 }
485
486 overlaps = acpi_ut_check_address_range(space_id, address,
487 (u32)length, warn);
488
489 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
490 return (overlaps);
491}
492
493ACPI_EXPORT_SYMBOL(acpi_check_address_range)
494#endif /* !ACPI_ASL_COMPILER */
495/*******************************************************************************
496 *
497 * FUNCTION: acpi_decode_pld_buffer
498 *
499 * PARAMETERS: in_buffer - Buffer returned by _PLD method
500 * length - Length of the in_buffer
501 * return_buffer - Where the decode buffer is returned
502 *
503 * RETURN: Status and the decoded _PLD buffer. User must deallocate
504 * the buffer via ACPI_FREE.
505 *
506 * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
507 * a local struct that is much more useful to an ACPI driver.
508 *
509 ******************************************************************************/
510acpi_status
511acpi_decode_pld_buffer(u8 *in_buffer,
512 acpi_size length, struct acpi_pld_info ** return_buffer)
513{
514 struct acpi_pld_info *pld_info;
515 u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
516 u32 dword;
517
518 /* Parameter validation */
519
520 if (!in_buffer || !return_buffer || (length < 16)) {
521 return (AE_BAD_PARAMETER);
522 }
523
524 pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
525 if (!pld_info) {
526 return (AE_NO_MEMORY);
527 }
528
529 /* First 32-bit DWord */
530
531 ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
532 pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
533 pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
534 pld_info->color = ACPI_PLD_GET_COLOR(&dword);
535
536 /* Second 32-bit DWord */
537
538 ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
539 pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
540 pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
541
542 /* Third 32-bit DWord */
543
544 ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
545 pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
546 pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
547 pld_info->lid = ACPI_PLD_GET_LID(&dword);
548 pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
549 pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
550 pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
551 pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
552 pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
553 pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
554 pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
555 pld_info->bay = ACPI_PLD_GET_BAY(&dword);
556
557 /* Fourth 32-bit DWord */
558
559 ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
560 pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
561 pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
562 pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
563 pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
564 pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
565 pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
566 pld_info->order = ACPI_PLD_GET_ORDER(&dword);
567
568 if (length >= ACPI_PLD_BUFFER_SIZE) {
569
570 /* Fifth 32-bit DWord (Revision 2 of _PLD) */
571
572 ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
573 pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
574 pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
575 }
576
577 *return_buffer = pld_info;
578 return (AE_OK);
579}
580
581ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)