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 - 2018, 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
276 if (!GpeBlock->Previous && !GpeBlock->Next)
277 {
278 /* This is the last GpeBlock on this interrupt */
279
280 Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock);
281 if (ACPI_FAILURE (Status))
282 {
283 goto UnlockAndExit;
284 }
285 }
286 else
287 {
288 /* Remove the block on this interrupt with lock */
289
290 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
291 if (GpeBlock->Previous)
292 {
293 GpeBlock->Previous->Next = GpeBlock->Next;
294 }
295 else
296 {
297 GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next;
298 }
299
300 if (GpeBlock->Next)
301 {
302 GpeBlock->Next->Previous = GpeBlock->Previous;
303 }
304
305 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
306 }
307
308 AcpiCurrentGpeCount -= GpeBlock->GpeCount;
309
310 /* Free the GpeBlock */
311
312 ACPI_FREE (GpeBlock->RegisterInfo);
313 ACPI_FREE (GpeBlock->EventInfo);
314 ACPI_FREE (GpeBlock);
315
316 UnlockAndExit:
317 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
318 return_ACPI_STATUS (Status);
319 }
320
321
322 /*******************************************************************************
323 *
324 * FUNCTION: AcpiEvCreateGpeInfoBlocks
325 *
326 * PARAMETERS: GpeBlock - New GPE block
327 *
328 * RETURN: Status
329 *
330 * DESCRIPTION: Create the RegisterInfo and EventInfo blocks for this GPE block
331 *
332 ******************************************************************************/
333
334 static ACPI_STATUS
AcpiEvCreateGpeInfoBlocks(ACPI_GPE_BLOCK_INFO * GpeBlock)335 AcpiEvCreateGpeInfoBlocks (
336 ACPI_GPE_BLOCK_INFO *GpeBlock)
337 {
338 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL;
339 ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL;
340 ACPI_GPE_EVENT_INFO *ThisEvent;
341 ACPI_GPE_REGISTER_INFO *ThisRegister;
342 UINT32 i;
343 UINT32 j;
344 ACPI_STATUS Status;
345
346
347 ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks);
348
349
350 /* Allocate the GPE register information block */
351
352 GpeRegisterInfo = ACPI_ALLOCATE_ZEROED (
353 (ACPI_SIZE) GpeBlock->RegisterCount *
354 sizeof (ACPI_GPE_REGISTER_INFO));
355 if (!GpeRegisterInfo)
356 {
357 ACPI_ERROR ((AE_INFO,
358 "Could not allocate the GpeRegisterInfo table"));
359 return_ACPI_STATUS (AE_NO_MEMORY);
360 }
361
362 /*
363 * Allocate the GPE EventInfo block. There are eight distinct GPEs
364 * per register. Initialization to zeros is sufficient.
365 */
366 GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount *
367 sizeof (ACPI_GPE_EVENT_INFO));
368 if (!GpeEventInfo)
369 {
370 ACPI_ERROR ((AE_INFO,
371 "Could not allocate the GpeEventInfo table"));
372 Status = AE_NO_MEMORY;
373 goto ErrorExit;
374 }
375
376 /* Save the new Info arrays in the GPE block */
377
378 GpeBlock->RegisterInfo = GpeRegisterInfo;
379 GpeBlock->EventInfo = GpeEventInfo;
380
381 /*
382 * Initialize the GPE Register and Event structures. A goal of these
383 * tables is to hide the fact that there are two separate GPE register
384 * sets in a given GPE hardware block, the status registers occupy the
385 * first half, and the enable registers occupy the second half.
386 */
387 ThisRegister = GpeRegisterInfo;
388 ThisEvent = GpeEventInfo;
389
390 for (i = 0; i < GpeBlock->RegisterCount; i++)
391 {
392 /* Init the RegisterInfo for this GPE register (8 GPEs) */
393
394 ThisRegister->BaseGpeNumber = (UINT16)
395 (GpeBlock->BlockBaseNumber + (i * ACPI_GPE_REGISTER_WIDTH));
396
397 ThisRegister->StatusAddress.Address =
398 GpeBlock->Address + i;
399
400 ThisRegister->EnableAddress.Address =
401 GpeBlock->Address + i + GpeBlock->RegisterCount;
402
403 ThisRegister->StatusAddress.SpaceId = GpeBlock->SpaceId;
404 ThisRegister->EnableAddress.SpaceId = GpeBlock->SpaceId;
405 ThisRegister->StatusAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
406 ThisRegister->EnableAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
407 ThisRegister->StatusAddress.BitOffset = 0;
408 ThisRegister->EnableAddress.BitOffset = 0;
409
410 /* Init the EventInfo for each GPE within this register */
411
412 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
413 {
414 ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j);
415 ThisEvent->RegisterInfo = ThisRegister;
416 ThisEvent++;
417 }
418
419 /* Disable all GPEs within this register */
420
421 Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress);
422 if (ACPI_FAILURE (Status))
423 {
424 goto ErrorExit;
425 }
426
427 /* Clear any pending GPE events within this register */
428
429 Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress);
430 if (ACPI_FAILURE (Status))
431 {
432 goto ErrorExit;
433 }
434
435 ThisRegister++;
436 }
437
438 return_ACPI_STATUS (AE_OK);
439
440
441 ErrorExit:
442 if (GpeRegisterInfo)
443 {
444 ACPI_FREE (GpeRegisterInfo);
445 }
446 if (GpeEventInfo)
447 {
448 ACPI_FREE (GpeEventInfo);
449 }
450
451 return_ACPI_STATUS (Status);
452 }
453
454
455 /*******************************************************************************
456 *
457 * FUNCTION: AcpiEvCreateGpeBlock
458 *
459 * PARAMETERS: GpeDevice - Handle to the parent GPE block
460 * GpeBlockAddress - Address and SpaceID
461 * RegisterCount - Number of GPE register pairs in the block
462 * GpeBlockBaseNumber - Starting GPE number for the block
463 * InterruptNumber - H/W interrupt for the block
464 * ReturnGpeBlock - Where the new block descriptor is returned
465 *
466 * RETURN: Status
467 *
468 * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
469 * the block are disabled at exit.
470 * Note: Assumes namespace is locked.
471 *
472 ******************************************************************************/
473
474 ACPI_STATUS
AcpiEvCreateGpeBlock(ACPI_NAMESPACE_NODE * GpeDevice,UINT64 Address,UINT8 SpaceId,UINT32 RegisterCount,UINT16 GpeBlockBaseNumber,UINT32 InterruptNumber,ACPI_GPE_BLOCK_INFO ** ReturnGpeBlock)475 AcpiEvCreateGpeBlock (
476 ACPI_NAMESPACE_NODE *GpeDevice,
477 UINT64 Address,
478 UINT8 SpaceId,
479 UINT32 RegisterCount,
480 UINT16 GpeBlockBaseNumber,
481 UINT32 InterruptNumber,
482 ACPI_GPE_BLOCK_INFO **ReturnGpeBlock)
483 {
484 ACPI_STATUS Status;
485 ACPI_GPE_BLOCK_INFO *GpeBlock;
486 ACPI_GPE_WALK_INFO WalkInfo;
487
488
489 ACPI_FUNCTION_TRACE (EvCreateGpeBlock);
490
491
492 if (!RegisterCount)
493 {
494 return_ACPI_STATUS (AE_OK);
495 }
496
497 /* Allocate a new GPE block */
498
499 GpeBlock = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_BLOCK_INFO));
500 if (!GpeBlock)
501 {
502 return_ACPI_STATUS (AE_NO_MEMORY);
503 }
504
505 /* Initialize the new GPE block */
506
507 GpeBlock->Address = Address;
508 GpeBlock->SpaceId = SpaceId;
509 GpeBlock->Node = GpeDevice;
510 GpeBlock->GpeCount = (UINT16) (RegisterCount * ACPI_GPE_REGISTER_WIDTH);
511 GpeBlock->Initialized = FALSE;
512 GpeBlock->RegisterCount = RegisterCount;
513 GpeBlock->BlockBaseNumber = GpeBlockBaseNumber;
514
515 /*
516 * Create the RegisterInfo and EventInfo sub-structures
517 * Note: disables and clears all GPEs in the block
518 */
519 Status = AcpiEvCreateGpeInfoBlocks (GpeBlock);
520 if (ACPI_FAILURE (Status))
521 {
522 ACPI_FREE (GpeBlock);
523 return_ACPI_STATUS (Status);
524 }
525
526 /* Install the new block in the global lists */
527
528 Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptNumber);
529 if (ACPI_FAILURE (Status))
530 {
531 ACPI_FREE (GpeBlock->RegisterInfo);
532 ACPI_FREE (GpeBlock->EventInfo);
533 ACPI_FREE (GpeBlock);
534 return_ACPI_STATUS (Status);
535 }
536
537 AcpiGbl_AllGpesInitialized = FALSE;
538
539 /* Find all GPE methods (_Lxx or_Exx) for this block */
540
541 WalkInfo.GpeBlock = GpeBlock;
542 WalkInfo.GpeDevice = GpeDevice;
543 WalkInfo.ExecuteByOwnerId = FALSE;
544
545 Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice,
546 ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
547 AcpiEvMatchGpeMethod, NULL, &WalkInfo, NULL);
548
549 /* Return the new block */
550
551 if (ReturnGpeBlock)
552 {
553 (*ReturnGpeBlock) = GpeBlock;
554 }
555
556 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
557 " Initialized GPE %02X to %02X [%4.4s] %u regs on interrupt 0x%X%s\n",
558 (UINT32) GpeBlock->BlockBaseNumber,
559 (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1)),
560 GpeDevice->Name.Ascii, GpeBlock->RegisterCount, InterruptNumber,
561 InterruptNumber == AcpiGbl_FADT.SciInterrupt ? " (SCI)" : ""));
562
563 /* Update global count of currently available GPEs */
564
565 AcpiCurrentGpeCount += GpeBlock->GpeCount;
566 return_ACPI_STATUS (AE_OK);
567 }
568
569
570 /*******************************************************************************
571 *
572 * FUNCTION: AcpiEvInitializeGpeBlock
573 *
574 * PARAMETERS: ACPI_GPE_CALLBACK
575 *
576 * RETURN: Status
577 *
578 * DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have
579 * associated methods.
580 * Note: Assumes namespace is locked.
581 *
582 ******************************************************************************/
583
584 ACPI_STATUS
AcpiEvInitializeGpeBlock(ACPI_GPE_XRUPT_INFO * GpeXruptInfo,ACPI_GPE_BLOCK_INFO * GpeBlock,void * Context)585 AcpiEvInitializeGpeBlock (
586 ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
587 ACPI_GPE_BLOCK_INFO *GpeBlock,
588 void *Context)
589 {
590 ACPI_STATUS Status;
591 ACPI_GPE_EVENT_INFO *GpeEventInfo;
592 UINT32 GpeEnabledCount;
593 UINT32 GpeIndex;
594 UINT32 i;
595 UINT32 j;
596 BOOLEAN *IsPollingNeeded = Context;
597 ACPI_ERROR_ONLY (UINT32 GpeNumber);
598
599
600 ACPI_FUNCTION_TRACE (EvInitializeGpeBlock);
601
602
603 /*
604 * Ignore a null GPE block (e.g., if no GPE block 1 exists), and
605 * any GPE blocks that have been initialized already.
606 */
607 if (!GpeBlock || GpeBlock->Initialized)
608 {
609 return_ACPI_STATUS (AE_OK);
610 }
611
612 /*
613 * Enable all GPEs that have a corresponding method and have the
614 * ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
615 * must be enabled via the acpi_enable_gpe() interface.
616 */
617 GpeEnabledCount = 0;
618
619 for (i = 0; i < GpeBlock->RegisterCount; i++)
620 {
621 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
622 {
623 /* Get the info block for this particular GPE */
624
625 GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
626 GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];
627 ACPI_ERROR_ONLY(GpeNumber = GpeBlock->BlockBaseNumber + GpeIndex);
628 GpeEventInfo->Flags |= ACPI_GPE_INITIALIZED;
629
630 /*
631 * Ignore GPEs that have no corresponding _Lxx/_Exx method
632 * and GPEs that are used to wake the system
633 */
634 if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != ACPI_GPE_DISPATCH_METHOD) ||
635 (GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
636 {
637 continue;
638 }
639
640 Status = AcpiEvAddGpeReference (GpeEventInfo);
641 if (ACPI_FAILURE (Status))
642 {
643 ACPI_EXCEPTION ((AE_INFO, Status,
644 "Could not enable GPE 0x%02X",
645 GpeNumber));
646 continue;
647 }
648
649 GpeEventInfo->Flags |= ACPI_GPE_AUTO_ENABLED;
650
651 if (IsPollingNeeded &&
652 ACPI_GPE_IS_POLLING_NEEDED (GpeEventInfo))
653 {
654 *IsPollingNeeded = TRUE;
655 }
656
657 GpeEnabledCount++;
658 }
659 }
660
661 if (GpeEnabledCount)
662 {
663 ACPI_INFO ((
664 "Enabled %u GPEs in block %02X to %02X", GpeEnabledCount,
665 (UINT32) GpeBlock->BlockBaseNumber,
666 (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1))));
667 }
668
669 GpeBlock->Initialized = TRUE;
670 return_ACPI_STATUS (AE_OK);
671 }
672
673 #endif /* !ACPI_REDUCED_HARDWARE */
674