1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3  *
4  * Module Name: hwgpe - Low level GPE enable/disable/clear functions
5  *
6  * Copyright (C) 2000 - 2022, Intel Corp.
7  *
8  *****************************************************************************/
9 
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acevents.h"
13 
14 #define _COMPONENT          ACPI_HARDWARE
15 ACPI_MODULE_NAME("hwgpe")
16 #if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
17 /* Local prototypes */
18 static acpi_status
19 acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
20 				struct acpi_gpe_block_info *gpe_block,
21 				void *context);
22 
23 static acpi_status
24 acpi_hw_gpe_enable_write(u8 enable_mask,
25 			 struct acpi_gpe_register_info *gpe_register_info);
26 
27 /******************************************************************************
28  *
29  * FUNCTION:    acpi_hw_gpe_read
30  *
31  * PARAMETERS:  value               - Where the value is returned
32  *              reg                 - GPE register structure
33  *
34  * RETURN:      Status
35  *
36  * DESCRIPTION: Read from a GPE register in either memory or IO space.
37  *
38  * LIMITATIONS: <These limitations also apply to acpi_hw_gpe_write>
39  *      space_ID must be system_memory or system_IO.
40  *
41  ******************************************************************************/
42 
acpi_hw_gpe_read(u64 * value,struct acpi_gpe_address * reg)43 acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_gpe_address *reg)
44 {
45 	acpi_status status;
46 	u32 value32;
47 
48 	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
49 #ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
50 		*value = (u64)ACPI_GET8((unsigned long)reg->address);
51 		return_ACPI_STATUS(AE_OK);
52 #else
53 		return acpi_os_read_memory((acpi_physical_address)reg->address,
54 					    value, ACPI_GPE_REGISTER_WIDTH);
55 #endif
56 	}
57 
58 	status = acpi_os_read_port((acpi_io_address)reg->address,
59 				   &value32, ACPI_GPE_REGISTER_WIDTH);
60 	if (ACPI_FAILURE(status))
61 		return_ACPI_STATUS(status);
62 
63 	*value = (u64)value32;
64 
65 	return_ACPI_STATUS(AE_OK);
66 }
67 
68 /******************************************************************************
69  *
70  * FUNCTION:    acpi_hw_gpe_write
71  *
72  * PARAMETERS:  value               - Value to be written
73  *              reg                 - GPE register structure
74  *
75  * RETURN:      Status
76  *
77  * DESCRIPTION: Write to a GPE register in either memory or IO space.
78  *
79  ******************************************************************************/
80 
acpi_hw_gpe_write(u64 value,struct acpi_gpe_address * reg)81 acpi_status acpi_hw_gpe_write(u64 value, struct acpi_gpe_address *reg)
82 {
83 	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
84 #ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
85 		ACPI_SET8((unsigned long)reg->address, value);
86 		return_ACPI_STATUS(AE_OK);
87 #else
88 		return acpi_os_write_memory((acpi_physical_address)reg->address,
89 					    value, ACPI_GPE_REGISTER_WIDTH);
90 #endif
91 	}
92 
93 	return acpi_os_write_port((acpi_io_address)reg->address, (u32)value,
94 				  ACPI_GPE_REGISTER_WIDTH);
95 }
96 
97 /******************************************************************************
98  *
99  * FUNCTION:	acpi_hw_get_gpe_register_bit
100  *
101  * PARAMETERS:	gpe_event_info	    - Info block for the GPE
102  *
103  * RETURN:	Register mask with a one in the GPE bit position
104  *
105  * DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
106  *              correct position for the input GPE.
107  *
108  ******************************************************************************/
109 
acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info * gpe_event_info)110 u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
111 {
112 
113 	return ((u32)1 <<
114 		(gpe_event_info->gpe_number -
115 		 gpe_event_info->register_info->base_gpe_number));
116 }
117 
118 /******************************************************************************
119  *
120  * FUNCTION:	acpi_hw_low_set_gpe
121  *
122  * PARAMETERS:	gpe_event_info	    - Info block for the GPE to be disabled
123  *		action		    - Enable or disable
124  *
125  * RETURN:	Status
126  *
127  * DESCRIPTION: Enable or disable a single GPE in the parent enable register.
128  *              The enable_mask field of the involved GPE register must be
129  *              updated by the caller if necessary.
130  *
131  ******************************************************************************/
132 
133 acpi_status
acpi_hw_low_set_gpe(struct acpi_gpe_event_info * gpe_event_info,u32 action)134 acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
135 {
136 	struct acpi_gpe_register_info *gpe_register_info;
137 	acpi_status status = AE_OK;
138 	u64 enable_mask;
139 	u32 register_bit;
140 
141 	ACPI_FUNCTION_ENTRY();
142 
143 	/* Get the info block for the entire GPE register */
144 
145 	gpe_register_info = gpe_event_info->register_info;
146 	if (!gpe_register_info) {
147 		return (AE_NOT_EXIST);
148 	}
149 
150 	/* Get current value of the enable register that contains this GPE */
151 
152 	status = acpi_hw_gpe_read(&enable_mask,
153 				  &gpe_register_info->enable_address);
154 	if (ACPI_FAILURE(status)) {
155 		return (status);
156 	}
157 
158 	/* Set or clear just the bit that corresponds to this GPE */
159 
160 	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
161 	switch (action) {
162 	case ACPI_GPE_CONDITIONAL_ENABLE:
163 
164 		/* Only enable if the corresponding enable_mask bit is set */
165 
166 		if (!(register_bit & gpe_register_info->enable_mask)) {
167 			return (AE_BAD_PARAMETER);
168 		}
169 
170 		ACPI_FALLTHROUGH;
171 
172 	case ACPI_GPE_ENABLE:
173 
174 		ACPI_SET_BIT(enable_mask, register_bit);
175 		break;
176 
177 	case ACPI_GPE_DISABLE:
178 
179 		ACPI_CLEAR_BIT(enable_mask, register_bit);
180 		break;
181 
182 	default:
183 
184 		ACPI_ERROR((AE_INFO, "Invalid GPE Action, %u", action));
185 		return (AE_BAD_PARAMETER);
186 	}
187 
188 	if (!(register_bit & gpe_register_info->mask_for_run)) {
189 
190 		/* Write the updated enable mask */
191 
192 		status = acpi_hw_gpe_write(enable_mask,
193 					   &gpe_register_info->enable_address);
194 	}
195 	return (status);
196 }
197 
198 /******************************************************************************
199  *
200  * FUNCTION:    acpi_hw_clear_gpe
201  *
202  * PARAMETERS:  gpe_event_info      - Info block for the GPE to be cleared
203  *
204  * RETURN:      Status
205  *
206  * DESCRIPTION: Clear the status bit for a single GPE.
207  *
208  ******************************************************************************/
209 
acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)210 acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
211 {
212 	struct acpi_gpe_register_info *gpe_register_info;
213 	acpi_status status;
214 	u32 register_bit;
215 
216 	ACPI_FUNCTION_ENTRY();
217 
218 	/* Get the info block for the entire GPE register */
219 
220 	gpe_register_info = gpe_event_info->register_info;
221 	if (!gpe_register_info) {
222 		return (AE_NOT_EXIST);
223 	}
224 
225 	/*
226 	 * Write a one to the appropriate bit in the status register to
227 	 * clear this GPE.
228 	 */
229 	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
230 
231 	status = acpi_hw_gpe_write(register_bit,
232 				   &gpe_register_info->status_address);
233 	return (status);
234 }
235 
236 /******************************************************************************
237  *
238  * FUNCTION:    acpi_hw_get_gpe_status
239  *
240  * PARAMETERS:  gpe_event_info      - Info block for the GPE to queried
241  *              event_status        - Where the GPE status is returned
242  *
243  * RETURN:      Status
244  *
245  * DESCRIPTION: Return the status of a single GPE.
246  *
247  ******************************************************************************/
248 
249 acpi_status
acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,acpi_event_status * event_status)250 acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
251 		       acpi_event_status *event_status)
252 {
253 	u64 in_byte;
254 	u32 register_bit;
255 	struct acpi_gpe_register_info *gpe_register_info;
256 	acpi_event_status local_event_status = 0;
257 	acpi_status status;
258 
259 	ACPI_FUNCTION_ENTRY();
260 
261 	if (!event_status) {
262 		return (AE_BAD_PARAMETER);
263 	}
264 
265 	/* GPE currently handled? */
266 
267 	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
268 	    ACPI_GPE_DISPATCH_NONE) {
269 		local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
270 	}
271 
272 	/* Get the info block for the entire GPE register */
273 
274 	gpe_register_info = gpe_event_info->register_info;
275 
276 	/* Get the register bitmask for this GPE */
277 
278 	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
279 
280 	/* GPE currently enabled? (enabled for runtime?) */
281 
282 	if (register_bit & gpe_register_info->enable_for_run) {
283 		local_event_status |= ACPI_EVENT_FLAG_ENABLED;
284 	}
285 
286 	/* GPE currently masked? (masked for runtime?) */
287 
288 	if (register_bit & gpe_register_info->mask_for_run) {
289 		local_event_status |= ACPI_EVENT_FLAG_MASKED;
290 	}
291 
292 	/* GPE enabled for wake? */
293 
294 	if (register_bit & gpe_register_info->enable_for_wake) {
295 		local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
296 	}
297 
298 	/* GPE currently enabled (enable bit == 1)? */
299 
300 	status = acpi_hw_gpe_read(&in_byte, &gpe_register_info->enable_address);
301 	if (ACPI_FAILURE(status)) {
302 		return (status);
303 	}
304 
305 	if (register_bit & in_byte) {
306 		local_event_status |= ACPI_EVENT_FLAG_ENABLE_SET;
307 	}
308 
309 	/* GPE currently active (status bit == 1)? */
310 
311 	status = acpi_hw_gpe_read(&in_byte, &gpe_register_info->status_address);
312 	if (ACPI_FAILURE(status)) {
313 		return (status);
314 	}
315 
316 	if (register_bit & in_byte) {
317 		local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
318 	}
319 
320 	/* Set return value */
321 
322 	(*event_status) = local_event_status;
323 	return (AE_OK);
324 }
325 
326 /******************************************************************************
327  *
328  * FUNCTION:    acpi_hw_gpe_enable_write
329  *
330  * PARAMETERS:  enable_mask         - Bit mask to write to the GPE register
331  *              gpe_register_info   - Gpe Register info
332  *
333  * RETURN:      Status
334  *
335  * DESCRIPTION: Write the enable mask byte to the given GPE register.
336  *
337  ******************************************************************************/
338 
339 static acpi_status
acpi_hw_gpe_enable_write(u8 enable_mask,struct acpi_gpe_register_info * gpe_register_info)340 acpi_hw_gpe_enable_write(u8 enable_mask,
341 			 struct acpi_gpe_register_info *gpe_register_info)
342 {
343 	acpi_status status;
344 
345 	gpe_register_info->enable_mask = enable_mask;
346 
347 	status = acpi_hw_gpe_write(enable_mask,
348 				   &gpe_register_info->enable_address);
349 	return (status);
350 }
351 
352 /******************************************************************************
353  *
354  * FUNCTION:    acpi_hw_disable_gpe_block
355  *
356  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
357  *              gpe_block           - Gpe Block info
358  *
359  * RETURN:      Status
360  *
361  * DESCRIPTION: Disable all GPEs within a single GPE block
362  *
363  ******************************************************************************/
364 
365 acpi_status
acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,struct acpi_gpe_block_info * gpe_block,void * context)366 acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
367 			  struct acpi_gpe_block_info *gpe_block, void *context)
368 {
369 	u32 i;
370 	acpi_status status;
371 
372 	/* Examine each GPE Register within the block */
373 
374 	for (i = 0; i < gpe_block->register_count; i++) {
375 
376 		/* Disable all GPEs in this register */
377 
378 		status =
379 		    acpi_hw_gpe_enable_write(0x00,
380 					     &gpe_block->register_info[i]);
381 		if (ACPI_FAILURE(status)) {
382 			return (status);
383 		}
384 	}
385 
386 	return (AE_OK);
387 }
388 
389 /******************************************************************************
390  *
391  * FUNCTION:    acpi_hw_clear_gpe_block
392  *
393  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
394  *              gpe_block           - Gpe Block info
395  *
396  * RETURN:      Status
397  *
398  * DESCRIPTION: Clear status bits for all GPEs within a single GPE block
399  *
400  ******************************************************************************/
401 
402 acpi_status
acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,struct acpi_gpe_block_info * gpe_block,void * context)403 acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
404 			struct acpi_gpe_block_info *gpe_block, void *context)
405 {
406 	u32 i;
407 	acpi_status status;
408 
409 	/* Examine each GPE Register within the block */
410 
411 	for (i = 0; i < gpe_block->register_count; i++) {
412 
413 		/* Clear status on all GPEs in this register */
414 
415 		status = acpi_hw_gpe_write(0xFF,
416 					   &gpe_block->register_info[i].status_address);
417 		if (ACPI_FAILURE(status)) {
418 			return (status);
419 		}
420 	}
421 
422 	return (AE_OK);
423 }
424 
425 /******************************************************************************
426  *
427  * FUNCTION:    acpi_hw_enable_runtime_gpe_block
428  *
429  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
430  *              gpe_block           - Gpe Block info
431  *
432  * RETURN:      Status
433  *
434  * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
435  *              combination wake/run GPEs.
436  *
437  ******************************************************************************/
438 
439 acpi_status
acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,struct acpi_gpe_block_info * gpe_block,void * context)440 acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
441 				 struct acpi_gpe_block_info *gpe_block,
442 				 void *context)
443 {
444 	u32 i;
445 	acpi_status status;
446 	struct acpi_gpe_register_info *gpe_register_info;
447 	u8 enable_mask;
448 
449 	/* NOTE: assumes that all GPEs are currently disabled */
450 
451 	/* Examine each GPE Register within the block */
452 
453 	for (i = 0; i < gpe_block->register_count; i++) {
454 		gpe_register_info = &gpe_block->register_info[i];
455 		if (!gpe_register_info->enable_for_run) {
456 			continue;
457 		}
458 
459 		/* Enable all "runtime" GPEs in this register */
460 
461 		enable_mask = gpe_register_info->enable_for_run &
462 		    ~gpe_register_info->mask_for_run;
463 		status =
464 		    acpi_hw_gpe_enable_write(enable_mask, gpe_register_info);
465 		if (ACPI_FAILURE(status)) {
466 			return (status);
467 		}
468 	}
469 
470 	return (AE_OK);
471 }
472 
473 /******************************************************************************
474  *
475  * FUNCTION:    acpi_hw_enable_wakeup_gpe_block
476  *
477  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
478  *              gpe_block           - Gpe Block info
479  *
480  * RETURN:      Status
481  *
482  * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
483  *              combination wake/run GPEs.
484  *
485  ******************************************************************************/
486 
487 static acpi_status
acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info * gpe_xrupt_info,struct acpi_gpe_block_info * gpe_block,void * context)488 acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
489 				struct acpi_gpe_block_info *gpe_block,
490 				void *context)
491 {
492 	u32 i;
493 	acpi_status status;
494 	struct acpi_gpe_register_info *gpe_register_info;
495 
496 	/* Examine each GPE Register within the block */
497 
498 	for (i = 0; i < gpe_block->register_count; i++) {
499 		gpe_register_info = &gpe_block->register_info[i];
500 
501 		/*
502 		 * Enable all "wake" GPEs in this register and disable the
503 		 * remaining ones.
504 		 */
505 
506 		status =
507 		    acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
508 					     gpe_register_info);
509 		if (ACPI_FAILURE(status)) {
510 			return (status);
511 		}
512 	}
513 
514 	return (AE_OK);
515 }
516 
517 struct acpi_gpe_block_status_context {
518 	struct acpi_gpe_register_info *gpe_skip_register_info;
519 	u8 gpe_skip_mask;
520 	u8 retval;
521 };
522 
523 /******************************************************************************
524  *
525  * FUNCTION:    acpi_hw_get_gpe_block_status
526  *
527  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
528  *              gpe_block           - Gpe Block info
529  *              context             - GPE list walk context data
530  *
531  * RETURN:      Success
532  *
533  * DESCRIPTION: Produce a combined GPE status bits mask for the given block.
534  *
535  ******************************************************************************/
536 
537 static acpi_status
acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info * gpe_xrupt_info,struct acpi_gpe_block_info * gpe_block,void * context)538 acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
539 			     struct acpi_gpe_block_info *gpe_block,
540 			     void *context)
541 {
542 	struct acpi_gpe_block_status_context *c = context;
543 	struct acpi_gpe_register_info *gpe_register_info;
544 	u64 in_enable, in_status;
545 	acpi_status status;
546 	u8 ret_mask;
547 	u32 i;
548 
549 	/* Examine each GPE Register within the block */
550 
551 	for (i = 0; i < gpe_block->register_count; i++) {
552 		gpe_register_info = &gpe_block->register_info[i];
553 
554 		status = acpi_hw_gpe_read(&in_enable,
555 					  &gpe_register_info->enable_address);
556 		if (ACPI_FAILURE(status)) {
557 			continue;
558 		}
559 
560 		status = acpi_hw_gpe_read(&in_status,
561 					  &gpe_register_info->status_address);
562 		if (ACPI_FAILURE(status)) {
563 			continue;
564 		}
565 
566 		ret_mask = in_enable & in_status;
567 		if (ret_mask && c->gpe_skip_register_info == gpe_register_info) {
568 			ret_mask &= ~c->gpe_skip_mask;
569 		}
570 		c->retval |= ret_mask;
571 	}
572 
573 	return (AE_OK);
574 }
575 
576 /******************************************************************************
577  *
578  * FUNCTION:    acpi_hw_disable_all_gpes
579  *
580  * PARAMETERS:  None
581  *
582  * RETURN:      Status
583  *
584  * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
585  *
586  ******************************************************************************/
587 
acpi_hw_disable_all_gpes(void)588 acpi_status acpi_hw_disable_all_gpes(void)
589 {
590 	acpi_status status;
591 
592 	ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
593 
594 	status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
595 	return_ACPI_STATUS(status);
596 }
597 
598 /******************************************************************************
599  *
600  * FUNCTION:    acpi_hw_enable_all_runtime_gpes
601  *
602  * PARAMETERS:  None
603  *
604  * RETURN:      Status
605  *
606  * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
607  *
608  ******************************************************************************/
609 
acpi_hw_enable_all_runtime_gpes(void)610 acpi_status acpi_hw_enable_all_runtime_gpes(void)
611 {
612 	acpi_status status;
613 
614 	ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);
615 
616 	status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL);
617 	return_ACPI_STATUS(status);
618 }
619 
620 /******************************************************************************
621  *
622  * FUNCTION:    acpi_hw_enable_all_wakeup_gpes
623  *
624  * PARAMETERS:  None
625  *
626  * RETURN:      Status
627  *
628  * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
629  *
630  ******************************************************************************/
631 
acpi_hw_enable_all_wakeup_gpes(void)632 acpi_status acpi_hw_enable_all_wakeup_gpes(void)
633 {
634 	acpi_status status;
635 
636 	ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);
637 
638 	status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL);
639 	return_ACPI_STATUS(status);
640 }
641 
642 /******************************************************************************
643  *
644  * FUNCTION:    acpi_hw_check_all_gpes
645  *
646  * PARAMETERS:  gpe_skip_device      - GPE devoce of the GPE to skip
647  *              gpe_skip_number      - Number of the GPE to skip
648  *
649  * RETURN:      Combined status of all GPEs
650  *
651  * DESCRIPTION: Check all enabled GPEs in all GPE blocks, except for the one
652  *              represented by the "skip" arguments, and return TRUE if the
653  *              status bit is set for at least one of them of FALSE otherwise.
654  *
655  ******************************************************************************/
656 
acpi_hw_check_all_gpes(acpi_handle gpe_skip_device,u32 gpe_skip_number)657 u8 acpi_hw_check_all_gpes(acpi_handle gpe_skip_device, u32 gpe_skip_number)
658 {
659 	struct acpi_gpe_block_status_context context = {
660 		.gpe_skip_register_info = NULL,
661 		.retval = 0,
662 	};
663 	struct acpi_gpe_event_info *gpe_event_info;
664 	acpi_cpu_flags flags;
665 
666 	ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes);
667 
668 	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
669 
670 	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_skip_device,
671 						    gpe_skip_number);
672 	if (gpe_event_info) {
673 		context.gpe_skip_register_info = gpe_event_info->register_info;
674 		context.gpe_skip_mask = acpi_hw_get_gpe_register_bit(gpe_event_info);
675 	}
676 
677 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
678 
679 	(void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &context);
680 	return (context.retval != 0);
681 }
682 
683 #endif				/* !ACPI_REDUCED_HARDWARE */
684