1 /******************************************************************************
2 *
3 * Module Name: evgpeblk - GPE block creation and initialization.
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 "acpi.h"
153 #include "accommon.h"
154 #include "acevents.h"
155 #include "acnamesp.h"
156
157 #define _COMPONENT ACPI_EVENTS
158 ACPI_MODULE_NAME ("evgpeblk")
159
160 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
161
162 /* Local prototypes */
163
164 static ACPI_STATUS
165 AcpiEvInstallGpeBlock (
166 ACPI_GPE_BLOCK_INFO *GpeBlock,
167 UINT32 InterruptNumber);
168
169 static ACPI_STATUS
170 AcpiEvCreateGpeInfoBlocks (
171 ACPI_GPE_BLOCK_INFO *GpeBlock);
172
173
174 /*******************************************************************************
175 *
176 * FUNCTION: AcpiEvInstallGpeBlock
177 *
178 * PARAMETERS: GpeBlock - New GPE block
179 * InterruptNumber - Xrupt to be associated with this
180 * GPE block
181 *
182 * RETURN: Status
183 *
184 * DESCRIPTION: Install new GPE block with mutex support
185 *
186 ******************************************************************************/
187
188 static ACPI_STATUS
AcpiEvInstallGpeBlock(ACPI_GPE_BLOCK_INFO * GpeBlock,UINT32 InterruptNumber)189 AcpiEvInstallGpeBlock (
190 ACPI_GPE_BLOCK_INFO *GpeBlock,
191 UINT32 InterruptNumber)
192 {
193 ACPI_GPE_BLOCK_INFO *NextGpeBlock;
194 ACPI_GPE_XRUPT_INFO *GpeXruptBlock;
195 ACPI_STATUS Status;
196 ACPI_CPU_FLAGS Flags;
197
198
199 ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
200
201
202 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
203 if (ACPI_FAILURE (Status))
204 {
205 return_ACPI_STATUS (Status);
206 }
207
208 Status = AcpiEvGetGpeXruptBlock (InterruptNumber, &GpeXruptBlock);
209 if (ACPI_FAILURE (Status))
210 {
211 goto UnlockAndExit;
212 }
213
214 /* Install the new block at the end of the list with lock */
215
216 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
217 if (GpeXruptBlock->GpeBlockListHead)
218 {
219 NextGpeBlock = GpeXruptBlock->GpeBlockListHead;
220 while (NextGpeBlock->Next)
221 {
222 NextGpeBlock = NextGpeBlock->Next;
223 }
224
225 NextGpeBlock->Next = GpeBlock;
226 GpeBlock->Previous = NextGpeBlock;
227 }
228 else
229 {
230 GpeXruptBlock->GpeBlockListHead = GpeBlock;
231 }
232
233 GpeBlock->XruptBlock = GpeXruptBlock;
234 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
235
236
237 UnlockAndExit:
238 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
239 return_ACPI_STATUS (Status);
240 }
241
242
243 /*******************************************************************************
244 *
245 * FUNCTION: AcpiEvDeleteGpeBlock
246 *
247 * PARAMETERS: GpeBlock - Existing GPE block
248 *
249 * RETURN: Status
250 *
251 * DESCRIPTION: Remove a GPE block
252 *
253 ******************************************************************************/
254
255 ACPI_STATUS
AcpiEvDeleteGpeBlock(ACPI_GPE_BLOCK_INFO * GpeBlock)256 AcpiEvDeleteGpeBlock (
257 ACPI_GPE_BLOCK_INFO *GpeBlock)
258 {
259 ACPI_STATUS Status;
260 ACPI_CPU_FLAGS Flags;
261
262
263 ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
264
265
266 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
267 if (ACPI_FAILURE (Status))
268 {
269 return_ACPI_STATUS (Status);
270 }
271
272 /* Disable all GPEs in this block */
273
274 Status = AcpiHwDisableGpeBlock (GpeBlock->XruptBlock, GpeBlock, NULL);
275 if (ACPI_FAILURE (Status))
276 {
277 return_ACPI_STATUS (Status);
278 }
279
280 if (!GpeBlock->Previous && !GpeBlock->Next)
281 {
282 /* This is the last GpeBlock on this interrupt */
283
284 Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock);
285 if (ACPI_FAILURE (Status))
286 {
287 goto UnlockAndExit;
288 }
289 }
290 else
291 {
292 /* Remove the block on this interrupt with lock */
293
294 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
295 if (GpeBlock->Previous)
296 {
297 GpeBlock->Previous->Next = GpeBlock->Next;
298 }
299 else
300 {
301 GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next;
302 }
303
304 if (GpeBlock->Next)
305 {
306 GpeBlock->Next->Previous = GpeBlock->Previous;
307 }
308
309 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
310 }
311
312 AcpiCurrentGpeCount -= GpeBlock->GpeCount;
313
314 /* Free the GpeBlock */
315
316 ACPI_FREE (GpeBlock->RegisterInfo);
317 ACPI_FREE (GpeBlock->EventInfo);
318 ACPI_FREE (GpeBlock);
319
320 UnlockAndExit:
321 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
322 return_ACPI_STATUS (Status);
323 }
324
325
326 /*******************************************************************************
327 *
328 * FUNCTION: AcpiEvCreateGpeInfoBlocks
329 *
330 * PARAMETERS: GpeBlock - New GPE block
331 *
332 * RETURN: Status
333 *
334 * DESCRIPTION: Create the RegisterInfo and EventInfo blocks for this GPE block
335 *
336 ******************************************************************************/
337
338 static ACPI_STATUS
AcpiEvCreateGpeInfoBlocks(ACPI_GPE_BLOCK_INFO * GpeBlock)339 AcpiEvCreateGpeInfoBlocks (
340 ACPI_GPE_BLOCK_INFO *GpeBlock)
341 {
342 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL;
343 ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL;
344 ACPI_GPE_EVENT_INFO *ThisEvent;
345 ACPI_GPE_REGISTER_INFO *ThisRegister;
346 UINT32 i;
347 UINT32 j;
348 ACPI_STATUS Status;
349
350
351 ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks);
352
353
354 /* Allocate the GPE register information block */
355
356 GpeRegisterInfo = ACPI_ALLOCATE_ZEROED (
357 (ACPI_SIZE) GpeBlock->RegisterCount *
358 sizeof (ACPI_GPE_REGISTER_INFO));
359 if (!GpeRegisterInfo)
360 {
361 ACPI_ERROR ((AE_INFO,
362 "Could not allocate the GpeRegisterInfo table"));
363 return_ACPI_STATUS (AE_NO_MEMORY);
364 }
365
366 /*
367 * Allocate the GPE EventInfo block. There are eight distinct GPEs
368 * per register. Initialization to zeros is sufficient.
369 */
370 GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount *
371 sizeof (ACPI_GPE_EVENT_INFO));
372 if (!GpeEventInfo)
373 {
374 ACPI_ERROR ((AE_INFO,
375 "Could not allocate the GpeEventInfo table"));
376 Status = AE_NO_MEMORY;
377 goto ErrorExit;
378 }
379
380 /* Save the new Info arrays in the GPE block */
381
382 GpeBlock->RegisterInfo = GpeRegisterInfo;
383 GpeBlock->EventInfo = GpeEventInfo;
384
385 /*
386 * Initialize the GPE Register and Event structures. A goal of these
387 * tables is to hide the fact that there are two separate GPE register
388 * sets in a given GPE hardware block, the status registers occupy the
389 * first half, and the enable registers occupy the second half.
390 */
391 ThisRegister = GpeRegisterInfo;
392 ThisEvent = GpeEventInfo;
393
394 for (i = 0; i < GpeBlock->RegisterCount; i++)
395 {
396 /* Init the RegisterInfo for this GPE register (8 GPEs) */
397
398 ThisRegister->BaseGpeNumber = (UINT16)
399 (GpeBlock->BlockBaseNumber + (i * ACPI_GPE_REGISTER_WIDTH));
400
401 ThisRegister->StatusAddress.Address =
402 GpeBlock->Address + i;
403
404 ThisRegister->EnableAddress.Address =
405 GpeBlock->Address + i + GpeBlock->RegisterCount;
406
407 ThisRegister->StatusAddress.SpaceId = GpeBlock->SpaceId;
408 ThisRegister->EnableAddress.SpaceId = GpeBlock->SpaceId;
409 ThisRegister->StatusAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
410 ThisRegister->EnableAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
411 ThisRegister->StatusAddress.BitOffset = 0;
412 ThisRegister->EnableAddress.BitOffset = 0;
413
414 /* Init the EventInfo for each GPE within this register */
415
416 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
417 {
418 ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j);
419 ThisEvent->RegisterInfo = ThisRegister;
420 ThisEvent++;
421 }
422
423 /* Disable all GPEs within this register */
424
425 Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress);
426 if (ACPI_FAILURE (Status))
427 {
428 goto ErrorExit;
429 }
430
431 /* Clear any pending GPE events within this register */
432
433 Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress);
434 if (ACPI_FAILURE (Status))
435 {
436 goto ErrorExit;
437 }
438
439 ThisRegister++;
440 }
441
442 return_ACPI_STATUS (AE_OK);
443
444
445 ErrorExit:
446 if (GpeRegisterInfo)
447 {
448 ACPI_FREE (GpeRegisterInfo);
449 }
450 if (GpeEventInfo)
451 {
452 ACPI_FREE (GpeEventInfo);
453 }
454
455 return_ACPI_STATUS (Status);
456 }
457
458
459 /*******************************************************************************
460 *
461 * FUNCTION: AcpiEvCreateGpeBlock
462 *
463 * PARAMETERS: GpeDevice - Handle to the parent GPE block
464 * GpeBlockAddress - Address and SpaceID
465 * RegisterCount - Number of GPE register pairs in the block
466 * GpeBlockBaseNumber - Starting GPE number for the block
467 * InterruptNumber - H/W interrupt for the block
468 * ReturnGpeBlock - Where the new block descriptor is returned
469 *
470 * RETURN: Status
471 *
472 * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
473 * the block are disabled at exit.
474 * Note: Assumes namespace is locked.
475 *
476 ******************************************************************************/
477
478 ACPI_STATUS
AcpiEvCreateGpeBlock(ACPI_NAMESPACE_NODE * GpeDevice,UINT64 Address,UINT8 SpaceId,UINT32 RegisterCount,UINT16 GpeBlockBaseNumber,UINT32 InterruptNumber,ACPI_GPE_BLOCK_INFO ** ReturnGpeBlock)479 AcpiEvCreateGpeBlock (
480 ACPI_NAMESPACE_NODE *GpeDevice,
481 UINT64 Address,
482 UINT8 SpaceId,
483 UINT32 RegisterCount,
484 UINT16 GpeBlockBaseNumber,
485 UINT32 InterruptNumber,
486 ACPI_GPE_BLOCK_INFO **ReturnGpeBlock)
487 {
488 ACPI_STATUS Status;
489 ACPI_GPE_BLOCK_INFO *GpeBlock;
490 ACPI_GPE_WALK_INFO WalkInfo;
491
492
493 ACPI_FUNCTION_TRACE (EvCreateGpeBlock);
494
495
496 if (!RegisterCount)
497 {
498 return_ACPI_STATUS (AE_OK);
499 }
500
501 /* Allocate a new GPE block */
502
503 GpeBlock = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_BLOCK_INFO));
504 if (!GpeBlock)
505 {
506 return_ACPI_STATUS (AE_NO_MEMORY);
507 }
508
509 /* Initialize the new GPE block */
510
511 GpeBlock->Address = Address;
512 GpeBlock->SpaceId = SpaceId;
513 GpeBlock->Node = GpeDevice;
514 GpeBlock->GpeCount = (UINT16) (RegisterCount * ACPI_GPE_REGISTER_WIDTH);
515 GpeBlock->Initialized = FALSE;
516 GpeBlock->RegisterCount = RegisterCount;
517 GpeBlock->BlockBaseNumber = GpeBlockBaseNumber;
518
519 /*
520 * Create the RegisterInfo and EventInfo sub-structures
521 * Note: disables and clears all GPEs in the block
522 */
523 Status = AcpiEvCreateGpeInfoBlocks (GpeBlock);
524 if (ACPI_FAILURE (Status))
525 {
526 ACPI_FREE (GpeBlock);
527 return_ACPI_STATUS (Status);
528 }
529
530 /* Install the new block in the global lists */
531
532 Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptNumber);
533 if (ACPI_FAILURE (Status))
534 {
535 ACPI_FREE (GpeBlock->RegisterInfo);
536 ACPI_FREE (GpeBlock->EventInfo);
537 ACPI_FREE (GpeBlock);
538 return_ACPI_STATUS (Status);
539 }
540
541 AcpiGbl_AllGpesInitialized = FALSE;
542
543 /* Find all GPE methods (_Lxx or_Exx) for this block */
544
545 WalkInfo.GpeBlock = GpeBlock;
546 WalkInfo.GpeDevice = GpeDevice;
547 WalkInfo.ExecuteByOwnerId = FALSE;
548
549 (void) AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice,
550 ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
551 AcpiEvMatchGpeMethod, NULL, &WalkInfo, NULL);
552
553 /* Return the new block */
554
555 if (ReturnGpeBlock)
556 {
557 (*ReturnGpeBlock) = GpeBlock;
558 }
559
560 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
561 " Initialized GPE %02X to %02X [%4.4s] %u regs on interrupt 0x%X%s\n",
562 (UINT32) GpeBlock->BlockBaseNumber,
563 (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1)),
564 GpeDevice->Name.Ascii, GpeBlock->RegisterCount, InterruptNumber,
565 InterruptNumber == AcpiGbl_FADT.SciInterrupt ? " (SCI)" : ""));
566
567 /* Update global count of currently available GPEs */
568
569 AcpiCurrentGpeCount += GpeBlock->GpeCount;
570 return_ACPI_STATUS (AE_OK);
571 }
572
573
574 /*******************************************************************************
575 *
576 * FUNCTION: AcpiEvInitializeGpeBlock
577 *
578 * PARAMETERS: ACPI_GPE_CALLBACK
579 *
580 * RETURN: Status
581 *
582 * DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have
583 * associated methods.
584 * Note: Assumes namespace is locked.
585 *
586 ******************************************************************************/
587
588 ACPI_STATUS
AcpiEvInitializeGpeBlock(ACPI_GPE_XRUPT_INFO * GpeXruptInfo,ACPI_GPE_BLOCK_INFO * GpeBlock,void * Context)589 AcpiEvInitializeGpeBlock (
590 ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
591 ACPI_GPE_BLOCK_INFO *GpeBlock,
592 void *Context)
593 {
594 ACPI_STATUS Status;
595 ACPI_GPE_EVENT_INFO *GpeEventInfo;
596 UINT32 GpeEnabledCount;
597 UINT32 GpeIndex;
598 UINT32 i;
599 UINT32 j;
600 BOOLEAN *IsPollingNeeded = Context;
601 ACPI_ERROR_ONLY (UINT32 GpeNumber);
602
603
604 ACPI_FUNCTION_TRACE (EvInitializeGpeBlock);
605
606
607 /*
608 * Ignore a null GPE block (e.g., if no GPE block 1 exists), and
609 * any GPE blocks that have been initialized already.
610 */
611 if (!GpeBlock || GpeBlock->Initialized)
612 {
613 return_ACPI_STATUS (AE_OK);
614 }
615
616 /*
617 * Enable all GPEs that have a corresponding method and have the
618 * ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
619 * must be enabled via the acpi_enable_gpe() interface.
620 */
621 GpeEnabledCount = 0;
622
623 for (i = 0; i < GpeBlock->RegisterCount; i++)
624 {
625 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
626 {
627 /* Get the info block for this particular GPE */
628
629 GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
630 GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];
631 ACPI_ERROR_ONLY(GpeNumber = GpeBlock->BlockBaseNumber + GpeIndex);
632 GpeEventInfo->Flags |= ACPI_GPE_INITIALIZED;
633
634 /*
635 * Ignore GPEs that have no corresponding _Lxx/_Exx method
636 * and GPEs that are used to wake the system
637 */
638 if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != ACPI_GPE_DISPATCH_METHOD) ||
639 (GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
640 {
641 continue;
642 }
643
644 Status = AcpiEvAddGpeReference (GpeEventInfo, FALSE);
645 if (ACPI_FAILURE (Status))
646 {
647 ACPI_EXCEPTION ((AE_INFO, Status,
648 "Could not enable GPE 0x%02X",
649 GpeNumber));
650 continue;
651 }
652
653 GpeEventInfo->Flags |= ACPI_GPE_AUTO_ENABLED;
654
655 if (IsPollingNeeded &&
656 ACPI_GPE_IS_POLLING_NEEDED (GpeEventInfo))
657 {
658 *IsPollingNeeded = TRUE;
659 }
660
661 GpeEnabledCount++;
662 }
663 }
664
665 if (GpeEnabledCount)
666 {
667 ACPI_INFO ((
668 "Enabled %u GPEs in block %02X to %02X", GpeEnabledCount,
669 (UINT32) GpeBlock->BlockBaseNumber,
670 (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1))));
671 }
672
673 GpeBlock->Initialized = TRUE;
674 return_ACPI_STATUS (AE_OK);
675 }
676
677 #endif /* !ACPI_REDUCED_HARDWARE */
678
