1 /******************************************************************************
2 *
3 * Module Name: evgpeinit - System GPE initialization and update
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acevents.h>
155 #include <contrib/dev/acpica/include/acnamesp.h>
156
157 #define _COMPONENT ACPI_EVENTS
158 ACPI_MODULE_NAME ("evgpeinit")
159
160 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
161
162 /*
163 * Note: History of _PRW support in ACPICA
164 *
165 * Originally (2000 - 2010), the GPE initialization code performed a walk of
166 * the entire namespace to execute the _PRW methods and detect all GPEs
167 * capable of waking the system.
168 *
169 * As of 10/2010, the _PRW method execution has been removed since it is
170 * actually unnecessary. The host OS must in fact execute all _PRW methods
171 * in order to identify the device/power-resource dependencies. We now put
172 * the onus on the host OS to identify the wake GPEs as part of this process
173 * and to inform ACPICA of these GPEs via the AcpiSetupGpeForWake interface. This
174 * not only reduces the complexity of the ACPICA initialization code, but in
175 * some cases (on systems with very large namespaces) it should reduce the
176 * kernel boot time as well.
177 */
178
179 /*******************************************************************************
180 *
181 * FUNCTION: AcpiEvGpeInitialize
182 *
183 * PARAMETERS: None
184 *
185 * RETURN: Status
186 *
187 * DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
188 *
189 ******************************************************************************/
190
191 ACPI_STATUS
AcpiEvGpeInitialize(void)192 AcpiEvGpeInitialize (
193 void)
194 {
195 UINT32 RegisterCount0 = 0;
196 UINT32 RegisterCount1 = 0;
197 UINT32 GpeNumberMax = 0;
198 ACPI_STATUS Status;
199
200
201 ACPI_FUNCTION_TRACE (EvGpeInitialize);
202
203
204 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
205 "Initializing General Purpose Events (GPEs):\n"));
206
207 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
208 if (ACPI_FAILURE (Status))
209 {
210 return_ACPI_STATUS (Status);
211 }
212
213 /*
214 * Initialize the GPE Block(s) defined in the FADT
215 *
216 * Why the GPE register block lengths are divided by 2: From the ACPI
217 * Spec, section "General-Purpose Event Registers", we have:
218 *
219 * "Each register block contains two registers of equal length
220 * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
221 * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
222 * The length of the GPE1_STS and GPE1_EN registers is equal to
223 * half the GPE1_LEN. If a generic register block is not supported
224 * then its respective block pointer and block length values in the
225 * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
226 * to be the same size."
227 */
228
229 /*
230 * Determine the maximum GPE number for this machine.
231 *
232 * Note: both GPE0 and GPE1 are optional, and either can exist without
233 * the other.
234 *
235 * If EITHER the register length OR the block address are zero, then that
236 * particular block is not supported.
237 */
238 if (AcpiGbl_FADT.Gpe0BlockLength &&
239 AcpiGbl_FADT.XGpe0Block.Address)
240 {
241 /* GPE block 0 exists (has both length and address > 0) */
242
243 RegisterCount0 = (UINT16) (AcpiGbl_FADT.Gpe0BlockLength / 2);
244 GpeNumberMax = (RegisterCount0 * ACPI_GPE_REGISTER_WIDTH) - 1;
245
246 /* Install GPE Block 0 */
247
248 Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
249 AcpiGbl_FADT.XGpe0Block.Address,
250 AcpiGbl_FADT.XGpe0Block.SpaceId,
251 RegisterCount0, 0,
252 AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[0]);
253
254 if (ACPI_FAILURE (Status))
255 {
256 ACPI_EXCEPTION ((AE_INFO, Status,
257 "Could not create GPE Block 0"));
258 }
259 }
260
261 if (AcpiGbl_FADT.Gpe1BlockLength &&
262 AcpiGbl_FADT.XGpe1Block.Address)
263 {
264 /* GPE block 1 exists (has both length and address > 0) */
265
266 RegisterCount1 = (UINT16) (AcpiGbl_FADT.Gpe1BlockLength / 2);
267
268 /* Check for GPE0/GPE1 overlap (if both banks exist) */
269
270 if ((RegisterCount0) &&
271 (GpeNumberMax >= AcpiGbl_FADT.Gpe1Base))
272 {
273 ACPI_ERROR ((AE_INFO,
274 "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
275 "(GPE %u to %u) - Ignoring GPE1",
276 GpeNumberMax, AcpiGbl_FADT.Gpe1Base,
277 AcpiGbl_FADT.Gpe1Base +
278 ((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1)));
279
280 /* Ignore GPE1 block by setting the register count to zero */
281
282 RegisterCount1 = 0;
283 }
284 else
285 {
286 /* Install GPE Block 1 */
287
288 Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
289 AcpiGbl_FADT.XGpe1Block.Address,
290 AcpiGbl_FADT.XGpe1Block.SpaceId,
291 RegisterCount1,
292 AcpiGbl_FADT.Gpe1Base,
293 AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[1]);
294
295 if (ACPI_FAILURE (Status))
296 {
297 ACPI_EXCEPTION ((AE_INFO, Status,
298 "Could not create GPE Block 1"));
299 }
300
301 /*
302 * GPE0 and GPE1 do not have to be contiguous in the GPE number
303 * space. However, GPE0 always starts at GPE number zero.
304 */
305 }
306 }
307
308 /* Exit if there are no GPE registers */
309
310 if ((RegisterCount0 + RegisterCount1) == 0)
311 {
312 /* GPEs are not required by ACPI, this is OK */
313
314 ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
315 "There are no GPE blocks defined in the FADT\n"));
316 goto Cleanup;
317 }
318
319
320 Cleanup:
321 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
322 return_ACPI_STATUS (AE_OK);
323 }
324
325
326 /*******************************************************************************
327 *
328 * FUNCTION: AcpiEvUpdateGpes
329 *
330 * PARAMETERS: TableOwnerId - ID of the newly-loaded ACPI table
331 *
332 * RETURN: None
333 *
334 * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
335 * result of a Load() or LoadTable() operation. If new GPE
336 * methods have been installed, register the new methods.
337 *
338 ******************************************************************************/
339
340 void
AcpiEvUpdateGpes(ACPI_OWNER_ID TableOwnerId)341 AcpiEvUpdateGpes (
342 ACPI_OWNER_ID TableOwnerId)
343 {
344 ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
345 ACPI_GPE_BLOCK_INFO *GpeBlock;
346 ACPI_GPE_WALK_INFO WalkInfo;
347 ACPI_STATUS Status = AE_OK;
348
349
350 /*
351 * Find any _Lxx/_Exx GPE methods that have just been loaded.
352 *
353 * Any GPEs that correspond to new _Lxx/_Exx methods are immediately
354 * enabled.
355 *
356 * Examine the namespace underneath each GpeDevice within the
357 * GpeBlock lists.
358 */
359 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
360 if (ACPI_FAILURE (Status))
361 {
362 return;
363 }
364
365 WalkInfo.Count = 0;
366 WalkInfo.OwnerId = TableOwnerId;
367 WalkInfo.ExecuteByOwnerId = TRUE;
368
369 /* Walk the interrupt level descriptor list */
370
371 GpeXruptInfo = AcpiGbl_GpeXruptListHead;
372 while (GpeXruptInfo)
373 {
374 /* Walk all Gpe Blocks attached to this interrupt level */
375
376 GpeBlock = GpeXruptInfo->GpeBlockListHead;
377 while (GpeBlock)
378 {
379 WalkInfo.GpeBlock = GpeBlock;
380 WalkInfo.GpeDevice = GpeBlock->Node;
381
382 Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD,
383 WalkInfo.GpeDevice, ACPI_UINT32_MAX,
384 ACPI_NS_WALK_NO_UNLOCK, AcpiEvMatchGpeMethod,
385 NULL, &WalkInfo, NULL);
386 if (ACPI_FAILURE (Status))
387 {
388 ACPI_EXCEPTION ((AE_INFO, Status,
389 "While decoding _Lxx/_Exx methods"));
390 }
391
392 GpeBlock = GpeBlock->Next;
393 }
394
395 GpeXruptInfo = GpeXruptInfo->Next;
396 }
397
398 if (WalkInfo.Count)
399 {
400 ACPI_INFO (("Enabled %u new GPEs", WalkInfo.Count));
401 }
402
403 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
404 return;
405 }
406
407
408 /*******************************************************************************
409 *
410 * FUNCTION: AcpiEvMatchGpeMethod
411 *
412 * PARAMETERS: Callback from WalkNamespace
413 *
414 * RETURN: Status
415 *
416 * DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a
417 * control method under the _GPE portion of the namespace.
418 * Extract the name and GPE type from the object, saving this
419 * information for quick lookup during GPE dispatch. Allows a
420 * per-OwnerId evaluation if ExecuteByOwnerId is TRUE in the
421 * WalkInfo parameter block.
422 *
423 * The name of each GPE control method is of the form:
424 * "_Lxx" or "_Exx", where:
425 * L - means that the GPE is level triggered
426 * E - means that the GPE is edge triggered
427 * xx - is the GPE number [in HEX]
428 *
429 * If WalkInfo->ExecuteByOwnerId is TRUE, we only execute examine GPE methods
430 * with that owner.
431 *
432 ******************************************************************************/
433
434 ACPI_STATUS
AcpiEvMatchGpeMethod(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)435 AcpiEvMatchGpeMethod (
436 ACPI_HANDLE ObjHandle,
437 UINT32 Level,
438 void *Context,
439 void **ReturnValue)
440 {
441 ACPI_NAMESPACE_NODE *MethodNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
442 ACPI_GPE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
443 ACPI_GPE_EVENT_INFO *GpeEventInfo;
444 ACPI_STATUS Status;
445 UINT32 GpeNumber;
446 UINT8 TempGpeNumber;
447 char Name[ACPI_NAMESEG_SIZE + 1];
448 UINT8 Type;
449
450
451 ACPI_FUNCTION_TRACE (EvMatchGpeMethod);
452
453
454 /* Check if requested OwnerId matches this OwnerId */
455
456 if ((WalkInfo->ExecuteByOwnerId) &&
457 (MethodNode->OwnerId != WalkInfo->OwnerId))
458 {
459 return_ACPI_STATUS (AE_OK);
460 }
461
462 /*
463 * Match and decode the _Lxx and _Exx GPE method names
464 *
465 * 1) Extract the method name and null terminate it
466 */
467 ACPI_MOVE_32_TO_32 (Name, &MethodNode->Name.Integer);
468 Name[ACPI_NAMESEG_SIZE] = 0;
469
470 /* 2) Name must begin with an underscore */
471
472 if (Name[0] != '_')
473 {
474 return_ACPI_STATUS (AE_OK); /* Ignore this method */
475 }
476
477 /*
478 * 3) Edge/Level determination is based on the 2nd character
479 * of the method name
480 */
481 switch (Name[1])
482 {
483 case 'L':
484
485 Type = ACPI_GPE_LEVEL_TRIGGERED;
486 break;
487
488 case 'E':
489
490 Type = ACPI_GPE_EDGE_TRIGGERED;
491 break;
492
493 default:
494
495 /* Unknown method type, just ignore it */
496
497 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
498 "Ignoring unknown GPE method type: %s "
499 "(name not of form _Lxx or _Exx)", Name));
500 return_ACPI_STATUS (AE_OK);
501 }
502
503 /* 4) The last two characters of the name are the hex GPE Number */
504
505 Status = AcpiUtAsciiToHexByte (&Name[2], &TempGpeNumber);
506 if (ACPI_FAILURE (Status))
507 {
508 /* Conversion failed; invalid method, just ignore it */
509
510 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
511 "Could not extract GPE number from name: %s "
512 "(name is not of form _Lxx or _Exx)", Name));
513 return_ACPI_STATUS (AE_OK);
514 }
515
516 /* Ensure that we have a valid GPE number for this GPE block */
517
518 GpeNumber = (UINT32) TempGpeNumber;
519 GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, WalkInfo->GpeBlock);
520 if (!GpeEventInfo)
521 {
522 /*
523 * This GpeNumber is not valid for this GPE block, just ignore it.
524 * However, it may be valid for a different GPE block, since GPE0
525 * and GPE1 methods both appear under \_GPE.
526 */
527 return_ACPI_STATUS (AE_OK);
528 }
529
530 if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
531 ACPI_GPE_DISPATCH_HANDLER) ||
532 (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
533 ACPI_GPE_DISPATCH_RAW_HANDLER))
534 {
535 /* If there is already a handler, ignore this GPE method */
536
537 return_ACPI_STATUS (AE_OK);
538 }
539
540 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
541 ACPI_GPE_DISPATCH_METHOD)
542 {
543 /*
544 * If there is already a method, ignore this method. But check
545 * for a type mismatch (if both the _Lxx AND _Exx exist)
546 */
547 if (Type != (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK))
548 {
549 ACPI_ERROR ((AE_INFO,
550 "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
551 GpeNumber, GpeNumber, GpeNumber));
552 }
553 return_ACPI_STATUS (AE_OK);
554 }
555
556 /* Disable the GPE in case it's been enabled already. */
557
558 (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
559
560 /*
561 * Add the GPE information from above to the GpeEventInfo block for
562 * use during dispatch of this GPE.
563 */
564 GpeEventInfo->Flags &= ~(ACPI_GPE_DISPATCH_MASK);
565 GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_METHOD);
566 GpeEventInfo->Dispatch.MethodNode = MethodNode;
567
568 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
569 "Registered GPE method %s as GPE number 0x%.2X\n",
570 Name, GpeNumber));
571 return_ACPI_STATUS (AE_OK);
572 }
573
574 #endif /* !ACPI_REDUCED_HARDWARE */
575