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1/******************************************************************************
2 *
3 * Module Name: utxface - External interfaces for "global" ACPI functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, 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 <linux/export.h>
45#include <acpi/acpi.h>
46#include "accommon.h"
47#include "acevents.h"
48#include "acnamesp.h"
49#include "acdebug.h"
50#include "actables.h"
51#include "acinterp.h"
52
53#define _COMPONENT ACPI_UTILITIES
54ACPI_MODULE_NAME("utxface")
55
56#ifndef ACPI_ASL_COMPILER
57/*******************************************************************************
58 *
59 * FUNCTION: acpi_initialize_subsystem
60 *
61 * PARAMETERS: None
62 *
63 * RETURN: Status
64 *
65 * DESCRIPTION: Initializes all global variables. This is the first function
66 * called, so any early initialization belongs here.
67 *
68 ******************************************************************************/
69acpi_status __init acpi_initialize_subsystem(void)
70{
71 acpi_status status;
72
73 ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
74
75 acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
76 ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
77
78 /* Initialize the OS-Dependent layer */
79
80 status = acpi_os_initialize();
81 if (ACPI_FAILURE(status)) {
82 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
83 return_ACPI_STATUS(status);
84 }
85
86 /* Initialize all globals used by the subsystem */
87
88 status = acpi_ut_init_globals();
89 if (ACPI_FAILURE(status)) {
90 ACPI_EXCEPTION((AE_INFO, status,
91 "During initialization of globals"));
92 return_ACPI_STATUS(status);
93 }
94
95 /* Create the default mutex objects */
96
97 status = acpi_ut_mutex_initialize();
98 if (ACPI_FAILURE(status)) {
99 ACPI_EXCEPTION((AE_INFO, status,
100 "During Global Mutex creation"));
101 return_ACPI_STATUS(status);
102 }
103
104 /*
105 * Initialize the namespace manager and
106 * the root of the namespace tree
107 */
108 status = acpi_ns_root_initialize();
109 if (ACPI_FAILURE(status)) {
110 ACPI_EXCEPTION((AE_INFO, status,
111 "During Namespace initialization"));
112 return_ACPI_STATUS(status);
113 }
114
115 /* Initialize the global OSI interfaces list with the static names */
116
117 status = acpi_ut_initialize_interfaces();
118 if (ACPI_FAILURE(status)) {
119 ACPI_EXCEPTION((AE_INFO, status,
120 "During OSI interfaces initialization"));
121 return_ACPI_STATUS(status);
122 }
123
124 /* If configured, initialize the AML debugger */
125
126 ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
127 return_ACPI_STATUS(status);
128}
129
130/*******************************************************************************
131 *
132 * FUNCTION: acpi_enable_subsystem
133 *
134 * PARAMETERS: Flags - Init/enable Options
135 *
136 * RETURN: Status
137 *
138 * DESCRIPTION: Completes the subsystem initialization including hardware.
139 * Puts system into ACPI mode if it isn't already.
140 *
141 ******************************************************************************/
142acpi_status acpi_enable_subsystem(u32 flags)
143{
144 acpi_status status = AE_OK;
145
146 ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
147
148#if (!ACPI_REDUCED_HARDWARE)
149
150 /* Enable ACPI mode */
151
152 if (!(flags & ACPI_NO_ACPI_ENABLE)) {
153 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
154 "[Init] Going into ACPI mode\n"));
155
156 acpi_gbl_original_mode = acpi_hw_get_mode();
157
158 status = acpi_enable();
159 if (ACPI_FAILURE(status)) {
160 ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
161 return_ACPI_STATUS(status);
162 }
163 }
164
165 /*
166 * Obtain a permanent mapping for the FACS. This is required for the
167 * Global Lock and the Firmware Waking Vector
168 */
169 status = acpi_tb_initialize_facs();
170 if (ACPI_FAILURE(status)) {
171 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
172 return_ACPI_STATUS(status);
173 }
174#endif /* !ACPI_REDUCED_HARDWARE */
175
176 /*
177 * Install the default op_region handlers. These are installed unless
178 * other handlers have already been installed via the
179 * install_address_space_handler interface.
180 */
181 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
182 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
183 "[Init] Installing default address space handlers\n"));
184
185 status = acpi_ev_install_region_handlers();
186 if (ACPI_FAILURE(status)) {
187 return_ACPI_STATUS(status);
188 }
189 }
190#if (!ACPI_REDUCED_HARDWARE)
191 /*
192 * Initialize ACPI Event handling (Fixed and General Purpose)
193 *
194 * Note1: We must have the hardware and events initialized before we can
195 * execute any control methods safely. Any control method can require
196 * ACPI hardware support, so the hardware must be fully initialized before
197 * any method execution!
198 *
199 * Note2: Fixed events are initialized and enabled here. GPEs are
200 * initialized, but cannot be enabled until after the hardware is
201 * completely initialized (SCI and global_lock activated)
202 */
203 if (!(flags & ACPI_NO_EVENT_INIT)) {
204 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
205 "[Init] Initializing ACPI events\n"));
206
207 status = acpi_ev_initialize_events();
208 if (ACPI_FAILURE(status)) {
209 return_ACPI_STATUS(status);
210 }
211 }
212
213 /*
214 * Install the SCI handler and Global Lock handler. This completes the
215 * hardware initialization.
216 */
217 if (!(flags & ACPI_NO_HANDLER_INIT)) {
218 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
219 "[Init] Installing SCI/GL handlers\n"));
220
221 status = acpi_ev_install_xrupt_handlers();
222 if (ACPI_FAILURE(status)) {
223 return_ACPI_STATUS(status);
224 }
225 }
226#endif /* !ACPI_REDUCED_HARDWARE */
227
228 return_ACPI_STATUS(status);
229}
230
231ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
232
233/*******************************************************************************
234 *
235 * FUNCTION: acpi_initialize_objects
236 *
237 * PARAMETERS: Flags - Init/enable Options
238 *
239 * RETURN: Status
240 *
241 * DESCRIPTION: Completes namespace initialization by initializing device
242 * objects and executing AML code for Regions, buffers, etc.
243 *
244 ******************************************************************************/
245acpi_status acpi_initialize_objects(u32 flags)
246{
247 acpi_status status = AE_OK;
248
249 ACPI_FUNCTION_TRACE(acpi_initialize_objects);
250
251 /*
252 * Run all _REG methods
253 *
254 * Note: Any objects accessed by the _REG methods will be automatically
255 * initialized, even if they contain executable AML (see the call to
256 * acpi_ns_initialize_objects below).
257 */
258 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
259 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
260 "[Init] Executing _REG OpRegion methods\n"));
261
262 status = acpi_ev_initialize_op_regions();
263 if (ACPI_FAILURE(status)) {
264 return_ACPI_STATUS(status);
265 }
266 }
267
268 /*
269 * Execute any module-level code that was detected during the table load
270 * phase. Although illegal since ACPI 2.0, there are many machines that
271 * contain this type of code. Each block of detected executable AML code
272 * outside of any control method is wrapped with a temporary control
273 * method object and placed on a global list. The methods on this list
274 * are executed below.
275 */
276 acpi_ns_exec_module_code_list();
277
278 /*
279 * Initialize the objects that remain uninitialized. This runs the
280 * executable AML that may be part of the declaration of these objects:
281 * operation_regions, buffer_fields, Buffers, and Packages.
282 */
283 if (!(flags & ACPI_NO_OBJECT_INIT)) {
284 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
285 "[Init] Completing Initialization of ACPI Objects\n"));
286
287 status = acpi_ns_initialize_objects();
288 if (ACPI_FAILURE(status)) {
289 return_ACPI_STATUS(status);
290 }
291 }
292
293 /*
294 * Initialize all device objects in the namespace. This runs the device
295 * _STA and _INI methods.
296 */
297 if (!(flags & ACPI_NO_DEVICE_INIT)) {
298 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
299 "[Init] Initializing ACPI Devices\n"));
300
301 status = acpi_ns_initialize_devices();
302 if (ACPI_FAILURE(status)) {
303 return_ACPI_STATUS(status);
304 }
305 }
306
307 /*
308 * Empty the caches (delete the cached objects) on the assumption that
309 * the table load filled them up more than they will be at runtime --
310 * thus wasting non-paged memory.
311 */
312 status = acpi_purge_cached_objects();
313
314 acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
315 return_ACPI_STATUS(status);
316}
317
318ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
319
320#endif
321/*******************************************************************************
322 *
323 * FUNCTION: acpi_terminate
324 *
325 * PARAMETERS: None
326 *
327 * RETURN: Status
328 *
329 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
330 *
331 ******************************************************************************/
332acpi_status acpi_terminate(void)
333{
334 acpi_status status;
335
336 ACPI_FUNCTION_TRACE(acpi_terminate);
337
338 /* Just exit if subsystem is already shutdown */
339
340 if (acpi_gbl_shutdown) {
341 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
342 return_ACPI_STATUS(AE_OK);
343 }
344
345 /* Subsystem appears active, go ahead and shut it down */
346
347 acpi_gbl_shutdown = TRUE;
348 acpi_gbl_startup_flags = 0;
349 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
350
351 /* Terminate the AML Debugger if present */
352
353 ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
354
355 /* Shutdown and free all resources */
356
357 acpi_ut_subsystem_shutdown();
358
359 /* Free the mutex objects */
360
361 acpi_ut_mutex_terminate();
362
363#ifdef ACPI_DEBUGGER
364
365 /* Shut down the debugger */
366
367 acpi_db_terminate();
368#endif
369
370 /* Now we can shutdown the OS-dependent layer */
371
372 status = acpi_os_terminate();
373 return_ACPI_STATUS(status);
374}
375
376ACPI_EXPORT_SYMBOL(acpi_terminate)
377
378#ifndef ACPI_ASL_COMPILER
379#ifdef ACPI_FUTURE_USAGE
380/*******************************************************************************
381 *
382 * FUNCTION: acpi_subsystem_status
383 *
384 * PARAMETERS: None
385 *
386 * RETURN: Status of the ACPI subsystem
387 *
388 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
389 * before making any other calls, to ensure the subsystem
390 * initialized successfully.
391 *
392 ******************************************************************************/
393acpi_status acpi_subsystem_status(void)
394{
395
396 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
397 return (AE_OK);
398 } else {
399 return (AE_ERROR);
400 }
401}
402
403ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
404
405/*******************************************************************************
406 *
407 * FUNCTION: acpi_get_system_info
408 *
409 * PARAMETERS: out_buffer - A buffer to receive the resources for the
410 * device
411 *
412 * RETURN: Status - the status of the call
413 *
414 * DESCRIPTION: This function is called to get information about the current
415 * state of the ACPI subsystem. It will return system information
416 * in the out_buffer.
417 *
418 * If the function fails an appropriate status will be returned
419 * and the value of out_buffer is undefined.
420 *
421 ******************************************************************************/
422acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
423{
424 struct acpi_system_info *info_ptr;
425 acpi_status status;
426
427 ACPI_FUNCTION_TRACE(acpi_get_system_info);
428
429 /* Parameter validation */
430
431 status = acpi_ut_validate_buffer(out_buffer);
432 if (ACPI_FAILURE(status)) {
433 return_ACPI_STATUS(status);
434 }
435
436 /* Validate/Allocate/Clear caller buffer */
437
438 status =
439 acpi_ut_initialize_buffer(out_buffer,
440 sizeof(struct acpi_system_info));
441 if (ACPI_FAILURE(status)) {
442 return_ACPI_STATUS(status);
443 }
444
445 /*
446 * Populate the return buffer
447 */
448 info_ptr = (struct acpi_system_info *)out_buffer->pointer;
449
450 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
451
452 /* System flags (ACPI capabilities) */
453
454 info_ptr->flags = ACPI_SYS_MODE_ACPI;
455
456 /* Timer resolution - 24 or 32 bits */
457
458 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
459 info_ptr->timer_resolution = 24;
460 } else {
461 info_ptr->timer_resolution = 32;
462 }
463
464 /* Clear the reserved fields */
465
466 info_ptr->reserved1 = 0;
467 info_ptr->reserved2 = 0;
468
469 /* Current debug levels */
470
471 info_ptr->debug_layer = acpi_dbg_layer;
472 info_ptr->debug_level = acpi_dbg_level;
473
474 return_ACPI_STATUS(AE_OK);
475}
476
477ACPI_EXPORT_SYMBOL(acpi_get_system_info)
478
479/*****************************************************************************
480 *
481 * FUNCTION: acpi_install_initialization_handler
482 *
483 * PARAMETERS: Handler - Callback procedure
484 * Function - Not (currently) used, see below
485 *
486 * RETURN: Status
487 *
488 * DESCRIPTION: Install an initialization handler
489 *
490 * TBD: When a second function is added, must save the Function also.
491 *
492 ****************************************************************************/
493acpi_status
494acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
495{
496
497 if (!handler) {
498 return (AE_BAD_PARAMETER);
499 }
500
501 if (acpi_gbl_init_handler) {
502 return (AE_ALREADY_EXISTS);
503 }
504
505 acpi_gbl_init_handler = handler;
506 return AE_OK;
507}
508
509ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
510#endif /* ACPI_FUTURE_USAGE */
511
512/*****************************************************************************
513 *
514 * FUNCTION: acpi_purge_cached_objects
515 *
516 * PARAMETERS: None
517 *
518 * RETURN: Status
519 *
520 * DESCRIPTION: Empty all caches (delete the cached objects)
521 *
522 ****************************************************************************/
523acpi_status acpi_purge_cached_objects(void)
524{
525 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
526
527 (void)acpi_os_purge_cache(acpi_gbl_state_cache);
528 (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
529 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
530 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
531 return_ACPI_STATUS(AE_OK);
532}
533
534ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
535
536/*****************************************************************************
537 *
538 * FUNCTION: acpi_install_interface
539 *
540 * PARAMETERS: interface_name - The interface to install
541 *
542 * RETURN: Status
543 *
544 * DESCRIPTION: Install an _OSI interface to the global list
545 *
546 ****************************************************************************/
547acpi_status acpi_install_interface(acpi_string interface_name)
548{
549 acpi_status status;
550 struct acpi_interface_info *interface_info;
551
552 /* Parameter validation */
553
554 if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
555 return (AE_BAD_PARAMETER);
556 }
557
558 (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
559
560 /* Check if the interface name is already in the global list */
561
562 interface_info = acpi_ut_get_interface(interface_name);
563 if (interface_info) {
564 /*
565 * The interface already exists in the list. This is OK if the
566 * interface has been marked invalid -- just clear the bit.
567 */
568 if (interface_info->flags & ACPI_OSI_INVALID) {
569 interface_info->flags &= ~ACPI_OSI_INVALID;
570 status = AE_OK;
571 } else {
572 status = AE_ALREADY_EXISTS;
573 }
574 } else {
575 /* New interface name, install into the global list */
576
577 status = acpi_ut_install_interface(interface_name);
578 }
579
580 acpi_os_release_mutex(acpi_gbl_osi_mutex);
581 return (status);
582}
583
584ACPI_EXPORT_SYMBOL(acpi_install_interface)
585
586/*****************************************************************************
587 *
588 * FUNCTION: acpi_remove_interface
589 *
590 * PARAMETERS: interface_name - The interface to remove
591 *
592 * RETURN: Status
593 *
594 * DESCRIPTION: Remove an _OSI interface from the global list
595 *
596 ****************************************************************************/
597acpi_status acpi_remove_interface(acpi_string interface_name)
598{
599 acpi_status status;
600
601 /* Parameter validation */
602
603 if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
604 return (AE_BAD_PARAMETER);
605 }
606
607 (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
608
609 status = acpi_ut_remove_interface(interface_name);
610
611 acpi_os_release_mutex(acpi_gbl_osi_mutex);
612 return (status);
613}
614
615ACPI_EXPORT_SYMBOL(acpi_remove_interface)
616
617/*****************************************************************************
618 *
619 * FUNCTION: acpi_install_interface_handler
620 *
621 * PARAMETERS: Handler - The _OSI interface handler to install
622 * NULL means "remove existing handler"
623 *
624 * RETURN: Status
625 *
626 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
627 * invoked during execution of the internal implementation of
628 * _OSI. A NULL handler simply removes any existing handler.
629 *
630 ****************************************************************************/
631acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
632{
633 acpi_status status = AE_OK;
634
635 (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
636
637 if (handler && acpi_gbl_interface_handler) {
638 status = AE_ALREADY_EXISTS;
639 } else {
640 acpi_gbl_interface_handler = handler;
641 }
642
643 acpi_os_release_mutex(acpi_gbl_osi_mutex);
644 return (status);
645}
646
647ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
648
649/*****************************************************************************
650 *
651 * FUNCTION: acpi_check_address_range
652 *
653 * PARAMETERS: space_id - Address space ID
654 * Address - Start address
655 * Length - Length
656 * Warn - TRUE if warning on overlap desired
657 *
658 * RETURN: Count of the number of conflicts detected.
659 *
660 * DESCRIPTION: Check if the input address range overlaps any of the
661 * ASL operation region address ranges.
662 *
663 ****************************************************************************/
664u32
665acpi_check_address_range(acpi_adr_space_type space_id,
666 acpi_physical_address address,
667 acpi_size length, u8 warn)
668{
669 u32 overlaps;
670 acpi_status status;
671
672 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
673 if (ACPI_FAILURE(status)) {
674 return (0);
675 }
676
677 overlaps = acpi_ut_check_address_range(space_id, address,
678 (u32)length, warn);
679
680 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
681 return (overlaps);
682}
683
684ACPI_EXPORT_SYMBOL(acpi_check_address_range)
685#endif /* !ACPI_ASL_COMPILER */
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: utxface - External interfaces, miscellaneous utility functions
5 *
6 * Copyright (C) 2000 - 2022, Intel Corp.
7 *
8 *****************************************************************************/
9
10#define EXPORT_ACPI_INTERFACES
11
12#include <acpi/acpi.h>
13#include "accommon.h"
14#include "acdebug.h"
15
16#define _COMPONENT ACPI_UTILITIES
17ACPI_MODULE_NAME("utxface")
18
19/*******************************************************************************
20 *
21 * FUNCTION: acpi_terminate
22 *
23 * PARAMETERS: None
24 *
25 * RETURN: Status
26 *
27 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
28 *
29 ******************************************************************************/
30acpi_status ACPI_INIT_FUNCTION acpi_terminate(void)
31{
32 acpi_status status;
33
34 ACPI_FUNCTION_TRACE(acpi_terminate);
35
36 /* Shutdown and free all resources */
37
38 acpi_ut_subsystem_shutdown();
39
40 /* Free the mutex objects */
41
42 acpi_ut_mutex_terminate();
43
44 /* Now we can shutdown the OS-dependent layer */
45
46 status = acpi_os_terminate();
47 return_ACPI_STATUS(status);
48}
49
50ACPI_EXPORT_SYMBOL_INIT(acpi_terminate)
51
52#ifndef ACPI_ASL_COMPILER
53#ifdef ACPI_FUTURE_USAGE
54/*******************************************************************************
55 *
56 * FUNCTION: acpi_subsystem_status
57 *
58 * PARAMETERS: None
59 *
60 * RETURN: Status of the ACPI subsystem
61 *
62 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
63 * before making any other calls, to ensure the subsystem
64 * initialized successfully.
65 *
66 ******************************************************************************/
67acpi_status acpi_subsystem_status(void)
68{
69
70 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
71 return (AE_OK);
72 } else {
73 return (AE_ERROR);
74 }
75}
76
77ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
78
79/*******************************************************************************
80 *
81 * FUNCTION: acpi_get_system_info
82 *
83 * PARAMETERS: out_buffer - A buffer to receive the resources for the
84 * device
85 *
86 * RETURN: status - the status of the call
87 *
88 * DESCRIPTION: This function is called to get information about the current
89 * state of the ACPI subsystem. It will return system information
90 * in the out_buffer.
91 *
92 * If the function fails an appropriate status will be returned
93 * and the value of out_buffer is undefined.
94 *
95 ******************************************************************************/
96acpi_status acpi_get_system_info(struct acpi_buffer *out_buffer)
97{
98 struct acpi_system_info *info_ptr;
99 acpi_status status;
100
101 ACPI_FUNCTION_TRACE(acpi_get_system_info);
102
103 /* Parameter validation */
104
105 status = acpi_ut_validate_buffer(out_buffer);
106 if (ACPI_FAILURE(status)) {
107 return_ACPI_STATUS(status);
108 }
109
110 /* Validate/Allocate/Clear caller buffer */
111
112 status =
113 acpi_ut_initialize_buffer(out_buffer,
114 sizeof(struct acpi_system_info));
115 if (ACPI_FAILURE(status)) {
116 return_ACPI_STATUS(status);
117 }
118
119 /*
120 * Populate the return buffer
121 */
122 info_ptr = (struct acpi_system_info *)out_buffer->pointer;
123 info_ptr->acpi_ca_version = ACPI_CA_VERSION;
124
125 /* System flags (ACPI capabilities) */
126
127 info_ptr->flags = ACPI_SYS_MODE_ACPI;
128
129 /* Timer resolution - 24 or 32 bits */
130
131 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
132 info_ptr->timer_resolution = 24;
133 } else {
134 info_ptr->timer_resolution = 32;
135 }
136
137 /* Clear the reserved fields */
138
139 info_ptr->reserved1 = 0;
140 info_ptr->reserved2 = 0;
141
142 /* Current debug levels */
143
144 info_ptr->debug_layer = acpi_dbg_layer;
145 info_ptr->debug_level = acpi_dbg_level;
146
147 return_ACPI_STATUS(AE_OK);
148}
149
150ACPI_EXPORT_SYMBOL(acpi_get_system_info)
151
152/*******************************************************************************
153 *
154 * FUNCTION: acpi_get_statistics
155 *
156 * PARAMETERS: stats - Where the statistics are returned
157 *
158 * RETURN: status - the status of the call
159 *
160 * DESCRIPTION: Get the contents of the various system counters
161 *
162 ******************************************************************************/
163acpi_status acpi_get_statistics(struct acpi_statistics *stats)
164{
165 ACPI_FUNCTION_TRACE(acpi_get_statistics);
166
167 /* Parameter validation */
168
169 if (!stats) {
170 return_ACPI_STATUS(AE_BAD_PARAMETER);
171 }
172
173 /* Various interrupt-based event counters */
174
175 stats->sci_count = acpi_sci_count;
176 stats->gpe_count = acpi_gpe_count;
177
178 memcpy(stats->fixed_event_count, acpi_fixed_event_count,
179 sizeof(acpi_fixed_event_count));
180
181 /* Other counters */
182
183 stats->method_count = acpi_method_count;
184 return_ACPI_STATUS(AE_OK);
185}
186
187ACPI_EXPORT_SYMBOL(acpi_get_statistics)
188
189/*****************************************************************************
190 *
191 * FUNCTION: acpi_install_initialization_handler
192 *
193 * PARAMETERS: handler - Callback procedure
194 * function - Not (currently) used, see below
195 *
196 * RETURN: Status
197 *
198 * DESCRIPTION: Install an initialization handler
199 *
200 * TBD: When a second function is added, must save the Function also.
201 *
202 ****************************************************************************/
203acpi_status
204acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
205{
206
207 if (!handler) {
208 return (AE_BAD_PARAMETER);
209 }
210
211 if (acpi_gbl_init_handler) {
212 return (AE_ALREADY_EXISTS);
213 }
214
215 acpi_gbl_init_handler = handler;
216 return (AE_OK);
217}
218
219ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
220#endif
221
222/*****************************************************************************
223 *
224 * FUNCTION: acpi_purge_cached_objects
225 *
226 * PARAMETERS: None
227 *
228 * RETURN: Status
229 *
230 * DESCRIPTION: Empty all caches (delete the cached objects)
231 *
232 ****************************************************************************/
233acpi_status acpi_purge_cached_objects(void)
234{
235 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
236
237 (void)acpi_os_purge_cache(acpi_gbl_state_cache);
238 (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
239 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
240 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
241
242 return_ACPI_STATUS(AE_OK);
243}
244
245ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
246
247/*****************************************************************************
248 *
249 * FUNCTION: acpi_install_interface
250 *
251 * PARAMETERS: interface_name - The interface to install
252 *
253 * RETURN: Status
254 *
255 * DESCRIPTION: Install an _OSI interface to the global list
256 *
257 ****************************************************************************/
258acpi_status acpi_install_interface(acpi_string interface_name)
259{
260 acpi_status status;
261 struct acpi_interface_info *interface_info;
262
263 /* Parameter validation */
264
265 if (!interface_name || (strlen(interface_name) == 0)) {
266 return (AE_BAD_PARAMETER);
267 }
268
269 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
270 if (ACPI_FAILURE(status)) {
271 return (status);
272 }
273
274 /* Check if the interface name is already in the global list */
275
276 interface_info = acpi_ut_get_interface(interface_name);
277 if (interface_info) {
278 /*
279 * The interface already exists in the list. This is OK if the
280 * interface has been marked invalid -- just clear the bit.
281 */
282 if (interface_info->flags & ACPI_OSI_INVALID) {
283 interface_info->flags &= ~ACPI_OSI_INVALID;
284 status = AE_OK;
285 } else {
286 status = AE_ALREADY_EXISTS;
287 }
288 } else {
289 /* New interface name, install into the global list */
290
291 status = acpi_ut_install_interface(interface_name);
292 }
293
294 acpi_os_release_mutex(acpi_gbl_osi_mutex);
295 return (status);
296}
297
298ACPI_EXPORT_SYMBOL(acpi_install_interface)
299
300/*****************************************************************************
301 *
302 * FUNCTION: acpi_remove_interface
303 *
304 * PARAMETERS: interface_name - The interface to remove
305 *
306 * RETURN: Status
307 *
308 * DESCRIPTION: Remove an _OSI interface from the global list
309 *
310 ****************************************************************************/
311acpi_status acpi_remove_interface(acpi_string interface_name)
312{
313 acpi_status status;
314
315 /* Parameter validation */
316
317 if (!interface_name || (strlen(interface_name) == 0)) {
318 return (AE_BAD_PARAMETER);
319 }
320
321 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
322 if (ACPI_FAILURE(status)) {
323 return (status);
324 }
325
326 status = acpi_ut_remove_interface(interface_name);
327
328 acpi_os_release_mutex(acpi_gbl_osi_mutex);
329 return (status);
330}
331
332ACPI_EXPORT_SYMBOL(acpi_remove_interface)
333
334/*****************************************************************************
335 *
336 * FUNCTION: acpi_install_interface_handler
337 *
338 * PARAMETERS: handler - The _OSI interface handler to install
339 * NULL means "remove existing handler"
340 *
341 * RETURN: Status
342 *
343 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
344 * invoked during execution of the internal implementation of
345 * _OSI. A NULL handler simply removes any existing handler.
346 *
347 ****************************************************************************/
348acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
349{
350 acpi_status status;
351
352 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
353 if (ACPI_FAILURE(status)) {
354 return (status);
355 }
356
357 if (handler && acpi_gbl_interface_handler) {
358 status = AE_ALREADY_EXISTS;
359 } else {
360 acpi_gbl_interface_handler = handler;
361 }
362
363 acpi_os_release_mutex(acpi_gbl_osi_mutex);
364 return (status);
365}
366
367ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
368
369/*****************************************************************************
370 *
371 * FUNCTION: acpi_update_interfaces
372 *
373 * PARAMETERS: action - Actions to be performed during the
374 * update
375 *
376 * RETURN: Status
377 *
378 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
379 * string or/and feature group strings.
380 *
381 ****************************************************************************/
382acpi_status acpi_update_interfaces(u8 action)
383{
384 acpi_status status;
385
386 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
387 if (ACPI_FAILURE(status)) {
388 return (status);
389 }
390
391 status = acpi_ut_update_interfaces(action);
392
393 acpi_os_release_mutex(acpi_gbl_osi_mutex);
394 return (status);
395}
396
397/*****************************************************************************
398 *
399 * FUNCTION: acpi_check_address_range
400 *
401 * PARAMETERS: space_id - Address space ID
402 * address - Start address
403 * length - Length
404 * warn - TRUE if warning on overlap desired
405 *
406 * RETURN: Count of the number of conflicts detected.
407 *
408 * DESCRIPTION: Check if the input address range overlaps any of the
409 * ASL operation region address ranges.
410 *
411 ****************************************************************************/
412
413u32
414acpi_check_address_range(acpi_adr_space_type space_id,
415 acpi_physical_address address,
416 acpi_size length, u8 warn)
417{
418 u32 overlaps;
419 acpi_status status;
420
421 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
422 if (ACPI_FAILURE(status)) {
423 return (0);
424 }
425
426 overlaps = acpi_ut_check_address_range(space_id, address,
427 (u32)length, warn);
428
429 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
430 return (overlaps);
431}
432
433ACPI_EXPORT_SYMBOL(acpi_check_address_range)
434#endif /* !ACPI_ASL_COMPILER */
435/*******************************************************************************
436 *
437 * FUNCTION: acpi_decode_pld_buffer
438 *
439 * PARAMETERS: in_buffer - Buffer returned by _PLD method
440 * length - Length of the in_buffer
441 * return_buffer - Where the decode buffer is returned
442 *
443 * RETURN: Status and the decoded _PLD buffer. User must deallocate
444 * the buffer via ACPI_FREE.
445 *
446 * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
447 * a local struct that is much more useful to an ACPI driver.
448 *
449 ******************************************************************************/
450acpi_status
451acpi_decode_pld_buffer(u8 *in_buffer,
452 acpi_size length, struct acpi_pld_info **return_buffer)
453{
454 struct acpi_pld_info *pld_info;
455 u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
456 u32 dword;
457
458 /* Parameter validation */
459
460 if (!in_buffer || !return_buffer
461 || (length < ACPI_PLD_REV1_BUFFER_SIZE)) {
462 return (AE_BAD_PARAMETER);
463 }
464
465 pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
466 if (!pld_info) {
467 return (AE_NO_MEMORY);
468 }
469
470 /* First 32-bit DWord */
471
472 ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
473 pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
474 pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
475 pld_info->red = ACPI_PLD_GET_RED(&dword);
476 pld_info->green = ACPI_PLD_GET_GREEN(&dword);
477 pld_info->blue = ACPI_PLD_GET_BLUE(&dword);
478
479 /* Second 32-bit DWord */
480
481 ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
482 pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
483 pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
484
485 /* Third 32-bit DWord */
486
487 ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
488 pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
489 pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
490 pld_info->lid = ACPI_PLD_GET_LID(&dword);
491 pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
492 pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
493 pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
494 pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
495 pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
496 pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
497 pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
498 pld_info->bay = ACPI_PLD_GET_BAY(&dword);
499
500 /* Fourth 32-bit DWord */
501
502 ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
503 pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
504 pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
505 pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
506 pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
507 pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
508 pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
509 pld_info->order = ACPI_PLD_GET_ORDER(&dword);
510
511 if (length >= ACPI_PLD_REV2_BUFFER_SIZE) {
512
513 /* Fifth 32-bit DWord (Revision 2 of _PLD) */
514
515 ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
516 pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
517 pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
518 }
519
520 *return_buffer = pld_info;
521 return (AE_OK);
522}
523
524ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)