evmisc.c revision 114237
1/****************************************************************************** 2 * 3 * Module Name: evmisc - Miscellaneous event manager support functions 4 * $Revision: 64 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2003, 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#include "acinterp.h" 121 122#define _COMPONENT ACPI_EVENTS 123 ACPI_MODULE_NAME ("evmisc") 124 125 126/******************************************************************************* 127 * 128 * FUNCTION: AcpiEvIsNotifyObject 129 * 130 * PARAMETERS: Node - Node to check 131 * 132 * RETURN: TRUE if notifies allowed on this object 133 * 134 * DESCRIPTION: Check type of node for a object that supports notifies. 135 * 136 * TBD: This could be replaced by a flag bit in the node. 137 * 138 ******************************************************************************/ 139 140BOOLEAN 141AcpiEvIsNotifyObject ( 142 ACPI_NAMESPACE_NODE *Node) 143{ 144 switch (Node->Type) 145 { 146 case ACPI_TYPE_DEVICE: 147 case ACPI_TYPE_PROCESSOR: 148 case ACPI_TYPE_POWER: 149 case ACPI_TYPE_THERMAL: 150 /* 151 * These are the ONLY objects that can receive ACPI notifications 152 */ 153 return (TRUE); 154 155 default: 156 return (FALSE); 157 } 158} 159 160 161/******************************************************************************* 162 * 163 * FUNCTION: AcpiEvQueueNotifyRequest 164 * 165 * PARAMETERS: 166 * 167 * RETURN: None. 168 * 169 * DESCRIPTION: Dispatch a device notification event to a previously 170 * installed handler. 171 * 172 ******************************************************************************/ 173 174ACPI_STATUS 175AcpiEvQueueNotifyRequest ( 176 ACPI_NAMESPACE_NODE *Node, 177 UINT32 NotifyValue) 178{ 179 ACPI_OPERAND_OBJECT *ObjDesc; 180 ACPI_OPERAND_OBJECT *HandlerObj = NULL; 181 ACPI_GENERIC_STATE *NotifyInfo; 182 ACPI_STATUS Status = AE_OK; 183 184 185 ACPI_FUNCTION_NAME ("EvQueueNotifyRequest"); 186 187 188 /* 189 * For value 1 (Ejection Request), some device method may need to be run. 190 * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run. 191 * For value 0x80 (Status Change) on the power button or sleep button, 192 * initiate soft-off or sleep operation? 193 */ 194 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 195 "Dispatching Notify(%X) on node %p\n", NotifyValue, Node)); 196 197 switch (NotifyValue) 198 { 199 case 0: 200 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Re-enumerate Devices\n")); 201 break; 202 203 case 1: 204 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Ejection Request\n")); 205 break; 206 207 case 2: 208 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Device Wake\n")); 209 break; 210 211 case 0x80: 212 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Status Change\n")); 213 break; 214 215 default: 216 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Unknown Notify Value: %X \n", NotifyValue)); 217 break; 218 } 219 220 /* 221 * Get the notify object attached to the NS Node 222 */ 223 ObjDesc = AcpiNsGetAttachedObject (Node); 224 if (ObjDesc) 225 { 226 /* We have the notify object, Get the right handler */ 227 228 switch (Node->Type) 229 { 230 case ACPI_TYPE_DEVICE: 231 case ACPI_TYPE_THERMAL: 232 case ACPI_TYPE_PROCESSOR: 233 case ACPI_TYPE_POWER: 234 235 if (NotifyValue <= ACPI_MAX_SYS_NOTIFY) 236 { 237 HandlerObj = ObjDesc->CommonNotify.SysHandler; 238 } 239 else 240 { 241 HandlerObj = ObjDesc->CommonNotify.DrvHandler; 242 } 243 break; 244 245 default: 246 /* All other types are not supported */ 247 return (AE_TYPE); 248 } 249 } 250 251 /* If there is any handler to run, schedule the dispatcher */ 252 253 if ((AcpiGbl_SysNotify.Handler && (NotifyValue <= ACPI_MAX_SYS_NOTIFY)) || 254 (AcpiGbl_DrvNotify.Handler && (NotifyValue > ACPI_MAX_SYS_NOTIFY)) || 255 HandlerObj) 256 { 257 NotifyInfo = AcpiUtCreateGenericState (); 258 if (!NotifyInfo) 259 { 260 return (AE_NO_MEMORY); 261 } 262 263 NotifyInfo->Common.DataType = ACPI_DESC_TYPE_STATE_NOTIFY; 264 NotifyInfo->Notify.Node = Node; 265 NotifyInfo->Notify.Value = (UINT16) NotifyValue; 266 NotifyInfo->Notify.HandlerObj = HandlerObj; 267 268 Status = AcpiOsQueueForExecution (OSD_PRIORITY_HIGH, 269 AcpiEvNotifyDispatch, NotifyInfo); 270 if (ACPI_FAILURE (Status)) 271 { 272 AcpiUtDeleteGenericState (NotifyInfo); 273 } 274 } 275 276 if (!HandlerObj) 277 { 278 /* There is no per-device notify handler for this device */ 279 280 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 281 "No notify handler for [%4.4s] node %p\n", Node->Name.Ascii, Node)); 282 } 283 284 return (Status); 285} 286 287 288/******************************************************************************* 289 * 290 * FUNCTION: AcpiEvNotifyDispatch 291 * 292 * PARAMETERS: 293 * 294 * RETURN: None. 295 * 296 * DESCRIPTION: Dispatch a device notification event to a previously 297 * installed handler. 298 * 299 ******************************************************************************/ 300 301void ACPI_SYSTEM_XFACE 302AcpiEvNotifyDispatch ( 303 void *Context) 304{ 305 ACPI_GENERIC_STATE *NotifyInfo = (ACPI_GENERIC_STATE *) Context; 306 ACPI_NOTIFY_HANDLER GlobalHandler = NULL; 307 void *GlobalContext = NULL; 308 ACPI_OPERAND_OBJECT *HandlerObj; 309 310 311 ACPI_FUNCTION_ENTRY (); 312 313 314 /* 315 * We will invoke a global notify handler if installed. 316 * This is done _before_ we invoke the per-device handler attached to the device. 317 */ 318 if (NotifyInfo->Notify.Value <= ACPI_MAX_SYS_NOTIFY) 319 { 320 /* Global system notification handler */ 321 322 if (AcpiGbl_SysNotify.Handler) 323 { 324 GlobalHandler = AcpiGbl_SysNotify.Handler; 325 GlobalContext = AcpiGbl_SysNotify.Context; 326 } 327 } 328 else 329 { 330 /* Global driver notification handler */ 331 332 if (AcpiGbl_DrvNotify.Handler) 333 { 334 GlobalHandler = AcpiGbl_DrvNotify.Handler; 335 GlobalContext = AcpiGbl_DrvNotify.Context; 336 } 337 } 338 339 /* Invoke the system handler first, if present */ 340 341 if (GlobalHandler) 342 { 343 GlobalHandler (NotifyInfo->Notify.Node, NotifyInfo->Notify.Value, GlobalContext); 344 } 345 346 /* Now invoke the per-device handler, if present */ 347 348 HandlerObj = NotifyInfo->Notify.HandlerObj; 349 if (HandlerObj) 350 { 351 HandlerObj->NotifyHandler.Handler (NotifyInfo->Notify.Node, NotifyInfo->Notify.Value, 352 HandlerObj->NotifyHandler.Context); 353 } 354 355 /* All done with the info object */ 356 357 AcpiUtDeleteGenericState (NotifyInfo); 358} 359 360 361/******************************************************************************* 362 * 363 * FUNCTION: AcpiEvGlobalLockThread 364 * 365 * RETURN: None 366 * 367 * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the 368 * Global Lock. Simply signal all threads that are waiting 369 * for the lock. 370 * 371 ******************************************************************************/ 372 373static void ACPI_SYSTEM_XFACE 374AcpiEvGlobalLockThread ( 375 void *Context) 376{ 377 ACPI_STATUS Status; 378 379 380 /* Signal threads that are waiting for the lock */ 381 382 if (AcpiGbl_GlobalLockThreadCount) 383 { 384 /* Send sufficient units to the semaphore */ 385 386 Status = AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, 387 AcpiGbl_GlobalLockThreadCount); 388 if (ACPI_FAILURE (Status)) 389 { 390 ACPI_REPORT_ERROR (("Could not signal Global Lock semaphore\n")); 391 } 392 } 393} 394 395 396/******************************************************************************* 397 * 398 * FUNCTION: AcpiEvGlobalLockHandler 399 * 400 * RETURN: Status 401 * 402 * DESCRIPTION: Invoked directly from the SCI handler when a global lock 403 * release interrupt occurs. Grab the global lock and queue 404 * the global lock thread for execution 405 * 406 ******************************************************************************/ 407 408static UINT32 409AcpiEvGlobalLockHandler ( 410 void *Context) 411{ 412 BOOLEAN Acquired = FALSE; 413 ACPI_STATUS Status; 414 415 416 /* 417 * Attempt to get the lock 418 * If we don't get it now, it will be marked pending and we will 419 * take another interrupt when it becomes free. 420 */ 421 ACPI_ACQUIRE_GLOBAL_LOCK (AcpiGbl_CommonFACS.GlobalLock, Acquired); 422 if (Acquired) 423 { 424 /* Got the lock, now wake all threads waiting for it */ 425 426 AcpiGbl_GlobalLockAcquired = TRUE; 427 428 /* Run the Global Lock thread which will signal all waiting threads */ 429 430 Status = AcpiOsQueueForExecution (OSD_PRIORITY_HIGH, 431 AcpiEvGlobalLockThread, Context); 432 if (ACPI_FAILURE (Status)) 433 { 434 ACPI_REPORT_ERROR (("Could not queue Global Lock thread, %s\n", 435 AcpiFormatException (Status))); 436 437 return (ACPI_INTERRUPT_NOT_HANDLED); 438 } 439 } 440 441 return (ACPI_INTERRUPT_HANDLED); 442} 443 444 445/******************************************************************************* 446 * 447 * FUNCTION: AcpiEvInitGlobalLockHandler 448 * 449 * RETURN: Status 450 * 451 * DESCRIPTION: Install a handler for the global lock release event 452 * 453 ******************************************************************************/ 454 455ACPI_STATUS 456AcpiEvInitGlobalLockHandler (void) 457{ 458 ACPI_STATUS Status; 459 460 461 ACPI_FUNCTION_TRACE ("EvInitGlobalLockHandler"); 462 463 464 AcpiGbl_GlobalLockPresent = TRUE; 465 Status = AcpiInstallFixedEventHandler (ACPI_EVENT_GLOBAL, 466 AcpiEvGlobalLockHandler, NULL); 467 468 /* 469 * If the global lock does not exist on this platform, the attempt 470 * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick) 471 * Map to AE_OK, but mark global lock as not present. 472 * Any attempt to actually use the global lock will be flagged 473 * with an error. 474 */ 475 if (Status == AE_NO_HARDWARE_RESPONSE) 476 { 477 AcpiGbl_GlobalLockPresent = FALSE; 478 Status = AE_OK; 479 } 480 481 return_ACPI_STATUS (Status); 482} 483 484 485/****************************************************************************** 486 * 487 * FUNCTION: AcpiEvAcquireGlobalLock 488 * 489 * RETURN: Status 490 * 491 * DESCRIPTION: Attempt to gain ownership of the Global Lock. 492 * 493 *****************************************************************************/ 494 495ACPI_STATUS 496AcpiEvAcquireGlobalLock ( 497 UINT16 Timeout) 498{ 499 ACPI_STATUS Status = AE_OK; 500 BOOLEAN Acquired = FALSE; 501 502 503 ACPI_FUNCTION_TRACE ("EvAcquireGlobalLock"); 504 505 506#ifndef ACPI_APPLICATION 507 /* Make sure that we actually have a global lock */ 508 509 if (!AcpiGbl_GlobalLockPresent) 510 { 511 return_ACPI_STATUS (AE_NO_GLOBAL_LOCK); 512 } 513#endif 514 515 /* One more thread wants the global lock */ 516 517 AcpiGbl_GlobalLockThreadCount++; 518 519 /* If we (OS side vs. BIOS side) have the hardware lock already, we are done */ 520 521 if (AcpiGbl_GlobalLockAcquired) 522 { 523 return_ACPI_STATUS (AE_OK); 524 } 525 526 /* We must acquire the actual hardware lock */ 527 528 ACPI_ACQUIRE_GLOBAL_LOCK (AcpiGbl_CommonFACS.GlobalLock, Acquired); 529 if (Acquired) 530 { 531 /* We got the lock */ 532 533 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquired the HW Global Lock\n")); 534 535 AcpiGbl_GlobalLockAcquired = TRUE; 536 return_ACPI_STATUS (AE_OK); 537 } 538 539 /* 540 * Did not get the lock. The pending bit was set above, and we must now 541 * wait until we get the global lock released interrupt. 542 */ 543 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n")); 544 545 /* 546 * Acquire the global lock semaphore first. 547 * Since this wait will block, we must release the interpreter 548 */ 549 Status = AcpiExSystemWaitSemaphore (AcpiGbl_GlobalLockSemaphore, 550 Timeout); 551 return_ACPI_STATUS (Status); 552} 553 554 555/******************************************************************************* 556 * 557 * FUNCTION: AcpiEvReleaseGlobalLock 558 * 559 * DESCRIPTION: Releases ownership of the Global Lock. 560 * 561 ******************************************************************************/ 562 563ACPI_STATUS 564AcpiEvReleaseGlobalLock (void) 565{ 566 BOOLEAN Pending = FALSE; 567 ACPI_STATUS Status = AE_OK; 568 569 570 ACPI_FUNCTION_TRACE ("EvReleaseGlobalLock"); 571 572 573 if (!AcpiGbl_GlobalLockThreadCount) 574 { 575 ACPI_REPORT_WARNING(("Cannot release HW Global Lock, it has not been acquired\n")); 576 return_ACPI_STATUS (AE_NOT_ACQUIRED); 577 } 578 579 /* One fewer thread has the global lock */ 580 581 AcpiGbl_GlobalLockThreadCount--; 582 if (AcpiGbl_GlobalLockThreadCount) 583 { 584 /* There are still some threads holding the lock, cannot release */ 585 586 return_ACPI_STATUS (AE_OK); 587 } 588 589 /* 590 * No more threads holding lock, we can do the actual hardware 591 * release 592 */ 593 ACPI_RELEASE_GLOBAL_LOCK (AcpiGbl_CommonFACS.GlobalLock, Pending); 594 AcpiGbl_GlobalLockAcquired = FALSE; 595 596 /* 597 * If the pending bit was set, we must write GBL_RLS to the control 598 * register 599 */ 600 if (Pending) 601 { 602 Status = AcpiSetRegister (ACPI_BITREG_GLOBAL_LOCK_RELEASE, 1, ACPI_MTX_LOCK); 603 } 604 605 return_ACPI_STATUS (Status); 606} 607 608 609/****************************************************************************** 610 * 611 * FUNCTION: AcpiEvTerminate 612 * 613 * PARAMETERS: none 614 * 615 * RETURN: none 616 * 617 * DESCRIPTION: Disable events and free memory allocated for table storage. 618 * 619 ******************************************************************************/ 620 621void 622AcpiEvTerminate (void) 623{ 624 ACPI_NATIVE_UINT i; 625 ACPI_STATUS Status; 626 ACPI_GPE_BLOCK_INFO *GpeBlock; 627 ACPI_GPE_BLOCK_INFO *NextGpeBlock; 628 ACPI_GPE_EVENT_INFO *GpeEventInfo; 629 630 631 ACPI_FUNCTION_TRACE ("EvTerminate"); 632 633 634 if (AcpiGbl_EventsInitialized) 635 { 636 /* 637 * Disable all event-related functionality. 638 * In all cases, on error, print a message but obviously we don't abort. 639 */ 640 641 /* 642 * Disable all fixed events 643 */ 644 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 645 { 646 Status = AcpiDisableEvent ((UINT32) i, ACPI_EVENT_FIXED, 0); 647 if (ACPI_FAILURE (Status)) 648 { 649 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not disable fixed event %d\n", (UINT32) i)); 650 } 651 } 652 653 /* 654 * Disable all GPEs 655 */ 656 GpeBlock = AcpiGbl_GpeBlockListHead; 657 while (GpeBlock) 658 { 659 GpeEventInfo = GpeBlock->EventInfo; 660 for (i = 0; i < (GpeBlock->RegisterCount * 8); i++) 661 { 662 Status = AcpiHwDisableGpe (GpeEventInfo); 663 if (ACPI_FAILURE (Status)) 664 { 665 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not disable GPE %d\n", (UINT32) i)); 666 } 667 668 GpeEventInfo++; 669 } 670 671 GpeBlock = GpeBlock->Next; 672 } 673 674 /* 675 * Remove SCI handler 676 */ 677 Status = AcpiEvRemoveSciHandler (); 678 if (ACPI_FAILURE(Status)) 679 { 680 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not remove SCI handler\n")); 681 } 682 } 683 684 /* 685 * Return to original mode if necessary 686 */ 687 if (AcpiGbl_OriginalMode == ACPI_SYS_MODE_LEGACY) 688 { 689 Status = AcpiDisable (); 690 if (ACPI_FAILURE (Status)) 691 { 692 ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "AcpiDisable failed\n")); 693 } 694 } 695 696 /* 697 * Free global GPE blocks and related info structures 698 */ 699 GpeBlock = AcpiGbl_GpeBlockListHead; 700 while (GpeBlock) 701 { 702 NextGpeBlock = GpeBlock->Next; 703 ACPI_MEM_FREE (GpeBlock->EventInfo); 704 ACPI_MEM_FREE (GpeBlock->RegisterInfo); 705 ACPI_MEM_FREE (GpeBlock); 706 707 GpeBlock = NextGpeBlock; 708 } 709 710 return_VOID; 711} 712 713