evgpe.c revision 131440
1/****************************************************************************** 2 * 3 * Module Name: evgpe - General Purpose Event handling and dispatch 4 * $Revision: 42 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#include "acpi.h" 118#include "acevents.h" 119#include "acnamesp.h" 120 121#define _COMPONENT ACPI_EVENTS 122 ACPI_MODULE_NAME ("evgpe") 123 124 125/******************************************************************************* 126 * 127 * FUNCTION: AcpiEvSetGpeType 128 * 129 * PARAMETERS: GpeEventInfo - GPE to set 130 * Type - New type 131 * 132 * RETURN: Status 133 * 134 * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) 135 * 136 ******************************************************************************/ 137 138ACPI_STATUS 139AcpiEvSetGpeType ( 140 ACPI_GPE_EVENT_INFO *GpeEventInfo, 141 UINT8 Type) 142{ 143 ACPI_STATUS Status; 144 145 146 ACPI_FUNCTION_TRACE ("EvSetGpeType"); 147 148 149 /* Validate type and update register enable masks */ 150 151 switch (Type) 152 { 153 case ACPI_GPE_TYPE_WAKE: 154 case ACPI_GPE_TYPE_RUNTIME: 155 case ACPI_GPE_TYPE_WAKE_RUN: 156 break; 157 158 default: 159 return_ACPI_STATUS (AE_BAD_PARAMETER); 160 } 161 162 /* Disable the GPE if currently enabled */ 163 164 Status = AcpiEvDisableGpe (GpeEventInfo); 165 166 /* Type was validated above */ 167 168 GpeEventInfo->Flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ 169 GpeEventInfo->Flags |= Type; /* Insert type */ 170 return_ACPI_STATUS (Status); 171} 172 173 174/******************************************************************************* 175 * 176 * FUNCTION: AcpiEvUpdateGpeEnableMasks 177 * 178 * PARAMETERS: GpeEventInfo - GPE to update 179 * 180 * RETURN: Status 181 * 182 * DESCRIPTION: Updates GPE register enable masks based on the GPE type 183 * 184 ******************************************************************************/ 185 186ACPI_STATUS 187AcpiEvUpdateGpeEnableMasks ( 188 ACPI_GPE_EVENT_INFO *GpeEventInfo, 189 UINT8 Type) 190{ 191 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 192 UINT8 RegisterBit; 193 194 195 ACPI_FUNCTION_TRACE ("EvUpdateGpeEnableMasks"); 196 197 198 GpeRegisterInfo = GpeEventInfo->RegisterInfo; 199 if (!GpeRegisterInfo) 200 { 201 return_ACPI_STATUS (AE_NOT_EXIST); 202 } 203 RegisterBit = GpeEventInfo->RegisterBit; 204 205 /* 1) Disable case. Simply clear all enable bits */ 206 207 if (Type == ACPI_GPE_DISABLE) 208 { 209 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 210 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 211 return_ACPI_STATUS (AE_OK); 212 } 213 214 /* 2) Enable case. Set/Clear the appropriate enable bits */ 215 216 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 217 { 218 case ACPI_GPE_TYPE_WAKE: 219 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 220 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 221 break; 222 223 case ACPI_GPE_TYPE_RUNTIME: 224 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 225 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 226 break; 227 228 case ACPI_GPE_TYPE_WAKE_RUN: 229 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 230 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 231 break; 232 233 default: 234 return_ACPI_STATUS (AE_BAD_PARAMETER); 235 } 236 237 return_ACPI_STATUS (AE_OK); 238} 239 240 241/******************************************************************************* 242 * 243 * FUNCTION: AcpiEvEnableGpe 244 * 245 * PARAMETERS: GpeEventInfo - GPE to enable 246 * 247 * RETURN: Status 248 * 249 * DESCRIPTION: Enable a GPE based on the GPE type 250 * 251 ******************************************************************************/ 252 253ACPI_STATUS 254AcpiEvEnableGpe ( 255 ACPI_GPE_EVENT_INFO *GpeEventInfo, 256 BOOLEAN WriteToHardware) 257{ 258 ACPI_STATUS Status; 259 260 261 ACPI_FUNCTION_TRACE ("EvEnableGpe"); 262 263 264 /* Make sure HW enable masks are updated */ 265 266 Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_ENABLE); 267 if (ACPI_FAILURE (Status)) 268 { 269 return_ACPI_STATUS (Status); 270 } 271 272 /* Mark wake-enabled or HW enable, or both */ 273 274 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 275 { 276 case ACPI_GPE_TYPE_WAKE: 277 278 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 279 break; 280 281 case ACPI_GPE_TYPE_WAKE_RUN: 282 283 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 284 285 /*lint -fallthrough */ 286 287 case ACPI_GPE_TYPE_RUNTIME: 288 289 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); 290 291 if (WriteToHardware) 292 { 293 /* Clear the GPE (of stale events), then enable it */ 294 295 Status = AcpiHwClearGpe (GpeEventInfo); 296 if (ACPI_FAILURE (Status)) 297 { 298 return_ACPI_STATUS (Status); 299 } 300 301 /* Enable the requested runtime GPE */ 302 303 Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); 304 } 305 break; 306 307 default: 308 return_ACPI_STATUS (AE_BAD_PARAMETER); 309 } 310 311 return_ACPI_STATUS (AE_OK); 312} 313 314 315/******************************************************************************* 316 * 317 * FUNCTION: AcpiEvDisableGpe 318 * 319 * PARAMETERS: GpeEventInfo - GPE to disable 320 * 321 * RETURN: Status 322 * 323 * DESCRIPTION: Disable a GPE based on the GPE type 324 * 325 ******************************************************************************/ 326 327ACPI_STATUS 328AcpiEvDisableGpe ( 329 ACPI_GPE_EVENT_INFO *GpeEventInfo) 330{ 331 ACPI_STATUS Status; 332 333 334 ACPI_FUNCTION_TRACE ("EvDisableGpe"); 335 336 337 if (!(GpeEventInfo->Flags & ACPI_GPE_ENABLE_MASK)) 338 { 339 return_ACPI_STATUS (AE_OK); 340 } 341 342 /* Make sure HW enable masks are updated */ 343 344 Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_DISABLE); 345 if (ACPI_FAILURE (Status)) 346 { 347 return_ACPI_STATUS (Status); 348 } 349 350 /* Mark wake-disabled or HW disable, or both */ 351 352 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 353 { 354 case ACPI_GPE_TYPE_WAKE: 355 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 356 break; 357 358 case ACPI_GPE_TYPE_WAKE_RUN: 359 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 360 361 /*lint -fallthrough */ 362 363 case ACPI_GPE_TYPE_RUNTIME: 364 365 /* Disable the requested runtime GPE */ 366 367 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); 368 Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); 369 break; 370 371 default: 372 return_ACPI_STATUS (AE_BAD_PARAMETER); 373 } 374 375 return_ACPI_STATUS (AE_OK); 376} 377 378 379/******************************************************************************* 380 * 381 * FUNCTION: AcpiEvGetGpeEventInfo 382 * 383 * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 384 * GpeNumber - Raw GPE number 385 * 386 * RETURN: A GPE EventInfo struct. NULL if not a valid GPE 387 * 388 * DESCRIPTION: Returns the EventInfo struct associated with this GPE. 389 * Validates the GpeBlock and the GpeNumber 390 * 391 * Should be called only when the GPE lists are semaphore locked 392 * and not subject to change. 393 * 394 ******************************************************************************/ 395 396ACPI_GPE_EVENT_INFO * 397AcpiEvGetGpeEventInfo ( 398 ACPI_HANDLE GpeDevice, 399 UINT32 GpeNumber) 400{ 401 ACPI_OPERAND_OBJECT *ObjDesc; 402 ACPI_GPE_BLOCK_INFO *GpeBlock; 403 ACPI_NATIVE_UINT i; 404 405 406 ACPI_FUNCTION_ENTRY (); 407 408 409 /* A NULL GpeBlock means use the FADT-defined GPE block(s) */ 410 411 if (!GpeDevice) 412 { 413 /* Examine GPE Block 0 and 1 (These blocks are permanent) */ 414 415 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) 416 { 417 GpeBlock = AcpiGbl_GpeFadtBlocks[i]; 418 if (GpeBlock) 419 { 420 if ((GpeNumber >= GpeBlock->BlockBaseNumber) && 421 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8))) 422 { 423 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]); 424 } 425 } 426 } 427 428 /* The GpeNumber was not in the range of either FADT GPE block */ 429 430 return (NULL); 431 } 432 433 /* A Non-NULL GpeDevice means this is a GPE Block Device */ 434 435 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice); 436 if (!ObjDesc || 437 !ObjDesc->Device.GpeBlock) 438 { 439 return (NULL); 440 } 441 442 GpeBlock = ObjDesc->Device.GpeBlock; 443 444 if ((GpeNumber >= GpeBlock->BlockBaseNumber) && 445 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8))) 446 { 447 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]); 448 } 449 450 return (NULL); 451} 452 453 454/******************************************************************************* 455 * 456 * FUNCTION: AcpiEvGpeDetect 457 * 458 * PARAMETERS: GpeXruptList - Interrupt block for this interrupt. 459 * Can have multiple GPE blocks attached. 460 * 461 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 462 * 463 * DESCRIPTION: Detect if any GP events have occurred. This function is 464 * executed at interrupt level. 465 * 466 ******************************************************************************/ 467 468UINT32 469AcpiEvGpeDetect ( 470 ACPI_GPE_XRUPT_INFO *GpeXruptList) 471{ 472 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; 473 UINT8 EnabledStatusByte; 474 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 475 UINT32 StatusReg; 476 UINT32 EnableReg; 477 ACPI_STATUS Status; 478 ACPI_GPE_BLOCK_INFO *GpeBlock; 479 ACPI_NATIVE_UINT i; 480 ACPI_NATIVE_UINT j; 481 482 483 ACPI_FUNCTION_NAME ("EvGpeDetect"); 484 485 /* Check for the case where there are no GPEs */ 486 487 if (!GpeXruptList) 488 { 489 return (IntStatus); 490 } 491 492 /* Examine all GPE blocks attached to this interrupt level */ 493 494 AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_ISR); 495 GpeBlock = GpeXruptList->GpeBlockListHead; 496 while (GpeBlock) 497 { 498 /* 499 * Read all of the 8-bit GPE status and enable registers 500 * in this GPE block, saving all of them. 501 * Find all currently active GP events. 502 */ 503 for (i = 0; i < GpeBlock->RegisterCount; i++) 504 { 505 /* Get the next status/enable pair */ 506 507 GpeRegisterInfo = &GpeBlock->RegisterInfo[i]; 508 509 /* Read the Status Register */ 510 511 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &StatusReg, 512 &GpeRegisterInfo->StatusAddress); 513 if (ACPI_FAILURE (Status)) 514 { 515 goto UnlockAndExit; 516 } 517 518 /* Read the Enable Register */ 519 520 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &EnableReg, 521 &GpeRegisterInfo->EnableAddress); 522 if (ACPI_FAILURE (Status)) 523 { 524 goto UnlockAndExit; 525 } 526 527 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, 528 "GPE pair: Status %8.8X%8.8X = %02X, Enable %8.8X%8.8X = %02X\n", 529 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS ( 530 GpeRegisterInfo->StatusAddress.Address)), 531 StatusReg, 532 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS ( 533 GpeRegisterInfo->EnableAddress.Address)), 534 EnableReg)); 535 536 /* First check if there is anything active at all in this register */ 537 538 EnabledStatusByte = (UINT8) (StatusReg & EnableReg); 539 if (!EnabledStatusByte) 540 { 541 /* No active GPEs in this register, move on */ 542 543 continue; 544 } 545 546 /* Now look at the individual GPEs in this byte register */ 547 548 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) 549 { 550 /* Examine one GPE bit */ 551 552 if (EnabledStatusByte & AcpiGbl_DecodeTo8bit[j]) 553 { 554 /* 555 * Found an active GPE. Dispatch the event to a handler 556 * or method. 557 */ 558 IntStatus |= AcpiEvGpeDispatch ( 559 &GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) + j], 560 (UINT32) j + GpeRegisterInfo->BaseGpeNumber); 561 } 562 } 563 } 564 565 GpeBlock = GpeBlock->Next; 566 } 567 568UnlockAndExit: 569 570 AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_ISR); 571 return (IntStatus); 572} 573 574 575/******************************************************************************* 576 * 577 * FUNCTION: AcpiEvAsynchExecuteGpeMethod 578 * 579 * PARAMETERS: Context (GpeEventInfo) - Info for this GPE 580 * 581 * RETURN: None 582 * 583 * DESCRIPTION: Perform the actual execution of a GPE control method. This 584 * function is called from an invocation of AcpiOsQueueForExecution 585 * (and therefore does NOT execute at interrupt level) so that 586 * the control method itself is not executed in the context of 587 * an interrupt handler. 588 * 589 ******************************************************************************/ 590 591static void ACPI_SYSTEM_XFACE 592AcpiEvAsynchExecuteGpeMethod ( 593 void *Context) 594{ 595 ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context; 596 UINT32 GpeNumber = 0; 597 ACPI_STATUS Status; 598 ACPI_GPE_EVENT_INFO LocalGpeEventInfo; 599 ACPI_PARAMETER_INFO Info; 600 601 602 ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod"); 603 604 605 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); 606 if (ACPI_FAILURE (Status)) 607 { 608 return_VOID; 609 } 610 611 /* Must revalidate the GpeNumber/GpeBlock */ 612 613 if (!AcpiEvValidGpeEvent (GpeEventInfo)) 614 { 615 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 616 return_VOID; 617 } 618 619 /* Set the GPE flags for return to enabled state */ 620 621 (void) AcpiEvEnableGpe (GpeEventInfo, FALSE); 622 623 /* 624 * Take a snapshot of the GPE info for this level - we copy the 625 * info to prevent a race condition with RemoveHandler/RemoveBlock. 626 */ 627 ACPI_MEMCPY (&LocalGpeEventInfo, GpeEventInfo, sizeof (ACPI_GPE_EVENT_INFO)); 628 629 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 630 if (ACPI_FAILURE (Status)) 631 { 632 return_VOID; 633 } 634 635 /* 636 * Must check for control method type dispatch one more 637 * time to avoid race with EvGpeInstallHandler 638 */ 639 if ((LocalGpeEventInfo.Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_METHOD) 640 { 641 /* 642 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx 643 * control method that corresponds to this GPE 644 */ 645 Info.Node = LocalGpeEventInfo.Dispatch.MethodNode; 646 Info.Parameters = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT *, GpeEventInfo); 647 Info.ParameterType = ACPI_PARAM_GPE; 648 649 Status = AcpiNsEvaluateByHandle (&Info); 650 if (ACPI_FAILURE (Status)) 651 { 652 ACPI_REPORT_ERROR (( 653 "%s while evaluating method [%4.4s] for GPE[%2X]\n", 654 AcpiFormatException (Status), 655 AcpiUtGetNodeName (LocalGpeEventInfo.Dispatch.MethodNode), 656 GpeNumber)); 657 } 658 } 659 660 if ((LocalGpeEventInfo.Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) 661 { 662 /* 663 * GPE is level-triggered, we clear the GPE status bit after 664 * handling the event. 665 */ 666 Status = AcpiHwClearGpe (&LocalGpeEventInfo); 667 if (ACPI_FAILURE (Status)) 668 { 669 return_VOID; 670 } 671 } 672 673 /* Enable this GPE */ 674 675 (void) AcpiHwWriteGpeEnableReg (&LocalGpeEventInfo); 676 return_VOID; 677} 678 679 680/******************************************************************************* 681 * 682 * FUNCTION: AcpiEvGpeDispatch 683 * 684 * PARAMETERS: GpeEventInfo - info for this GPE 685 * GpeNumber - Number relative to the parent GPE block 686 * 687 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 688 * 689 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) 690 * or method (e.g. _Lxx/_Exx) handler. 691 * 692 * This function executes at interrupt level. 693 * 694 ******************************************************************************/ 695 696UINT32 697AcpiEvGpeDispatch ( 698 ACPI_GPE_EVENT_INFO *GpeEventInfo, 699 UINT32 GpeNumber) 700{ 701 ACPI_STATUS Status; 702 703 704 ACPI_FUNCTION_TRACE ("EvGpeDispatch"); 705 706 707 /* 708 * If edge-triggered, clear the GPE status bit now. Note that 709 * level-triggered events are cleared after the GPE is serviced. 710 */ 711 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_EDGE_TRIGGERED) 712 { 713 Status = AcpiHwClearGpe (GpeEventInfo); 714 if (ACPI_FAILURE (Status)) 715 { 716 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2X]\n", 717 GpeNumber)); 718 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 719 } 720 } 721 722 /* Save current system state */ 723 724 if (AcpiGbl_SystemAwakeAndRunning) 725 { 726 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_SYSTEM_RUNNING); 727 } 728 else 729 { 730 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_SYSTEM_RUNNING); 731 } 732 733 /* 734 * Dispatch the GPE to either an installed handler, or the control 735 * method associated with this GPE (_Lxx or _Exx). 736 * If a handler exists, we invoke it and do not attempt to run the method. 737 * If there is neither a handler nor a method, we disable the level to 738 * prevent further events from coming in here. 739 */ 740 switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) 741 { 742 case ACPI_GPE_DISPATCH_HANDLER: 743 744 /* 745 * Invoke the installed handler (at interrupt level) 746 * Ignore return status for now. TBD: leave GPE disabled on error? 747 */ 748 (void) GpeEventInfo->Dispatch.Handler->Address ( 749 GpeEventInfo->Dispatch.Handler->Context); 750 751 /* It is now safe to clear level-triggered events. */ 752 753 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) 754 { 755 Status = AcpiHwClearGpe (GpeEventInfo); 756 if (ACPI_FAILURE (Status)) 757 { 758 ACPI_REPORT_ERROR (( 759 "AcpiEvGpeDispatch: Unable to clear GPE[%2X]\n", 760 GpeNumber)); 761 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 762 } 763 } 764 break; 765 766 case ACPI_GPE_DISPATCH_METHOD: 767 768 /* 769 * Disable GPE, so it doesn't keep firing before the method has a 770 * chance to run. 771 */ 772 Status = AcpiEvDisableGpe (GpeEventInfo); 773 if (ACPI_FAILURE (Status)) 774 { 775 ACPI_REPORT_ERROR (( 776 "AcpiEvGpeDispatch: Unable to disable GPE[%2X]\n", 777 GpeNumber)); 778 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 779 } 780 781 /* 782 * Execute the method associated with the GPE 783 * NOTE: Level-triggered GPEs are cleared after the method completes. 784 */ 785 if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE, 786 AcpiEvAsynchExecuteGpeMethod, 787 GpeEventInfo))) 788 { 789 ACPI_REPORT_ERROR (( 790 "AcpiEvGpeDispatch: Unable to queue handler for GPE[%2X], event is disabled\n", 791 GpeNumber)); 792 } 793 break; 794 795 default: 796 797 /* No handler or method to run! */ 798 799 ACPI_REPORT_ERROR (( 800 "AcpiEvGpeDispatch: No handler or method for GPE[%2X], disabling event\n", 801 GpeNumber)); 802 803 /* 804 * Disable the GPE. The GPE will remain disabled until the ACPI 805 * Core Subsystem is restarted, or a handler is installed. 806 */ 807 Status = AcpiEvDisableGpe (GpeEventInfo); 808 if (ACPI_FAILURE (Status)) 809 { 810 ACPI_REPORT_ERROR (( 811 "AcpiEvGpeDispatch: Unable to disable GPE[%2X]\n", 812 GpeNumber)); 813 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 814 } 815 break; 816 } 817 818 return_VALUE (ACPI_INTERRUPT_HANDLED); 819} 820 821 822#ifdef ACPI_GPE_NOTIFY_CHECK 823 824/******************************************************************************* 825 * NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED 826 * 827 * FUNCTION: AcpiEvCheckForWakeOnlyGpe 828 * 829 * PARAMETERS: GpeEventInfo - info for this GPE 830 * 831 * RETURN: Status 832 * 833 * DESCRIPTION: Determine if a a GPE is "wake-only". 834 * 835 * Called from Notify() code in interpreter when a "DeviceWake" 836 * Notify comes in. 837 * 838 ******************************************************************************/ 839 840ACPI_STATUS 841AcpiEvCheckForWakeOnlyGpe ( 842 ACPI_GPE_EVENT_INFO *GpeEventInfo) 843{ 844 ACPI_STATUS Status; 845 846 847 ACPI_FUNCTION_TRACE ("EvCheckForWakeOnlyGpe"); 848 849 850 if ((GpeEventInfo) && /* Only >0 for _Lxx/_Exx */ 851 ((GpeEventInfo->Flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) /* System state at GPE time */ 852 { 853 /* This must be a wake-only GPE, disable it */ 854 855 Status = AcpiEvDisableGpe (GpeEventInfo); 856 857 /* Set GPE to wake-only. Do not change wake disabled/enabled status */ 858 859 AcpiEvSetGpeType (GpeEventInfo, ACPI_GPE_TYPE_WAKE); 860 861 ACPI_REPORT_INFO (("GPE %p was updated from wake/run to wake-only\n", 862 GpeEventInfo)); 863 864 /* This was a wake-only GPE */ 865 866 return_ACPI_STATUS (AE_WAKE_ONLY_GPE); 867 } 868 869 return_ACPI_STATUS (AE_OK); 870} 871#endif 872 873 874