1/****************************************************************************** 2 * 3 * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init 4 * 5 *****************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2009, 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 *****************************************************************************/ 115 116 117#define __EVRGNINI_C__ 118 119#include <contrib/dev/acpica/include/acpi.h> 120#include <contrib/dev/acpica/include/accommon.h> 121#include <contrib/dev/acpica/include/acevents.h> 122#include <contrib/dev/acpica/include/acnamesp.h> 123 124#define _COMPONENT ACPI_EVENTS 125 ACPI_MODULE_NAME ("evrgnini") 126 127/* Local prototypes */ 128 129static BOOLEAN 130AcpiEvIsPciRootBridge ( 131 ACPI_NAMESPACE_NODE *Node); 132 133 134/******************************************************************************* 135 * 136 * FUNCTION: AcpiEvSystemMemoryRegionSetup 137 * 138 * PARAMETERS: Handle - Region we are interested in 139 * Function - Start or stop 140 * HandlerContext - Address space handler context 141 * RegionContext - Region specific context 142 * 143 * RETURN: Status 144 * 145 * DESCRIPTION: Setup a SystemMemory operation region 146 * 147 ******************************************************************************/ 148 149ACPI_STATUS 150AcpiEvSystemMemoryRegionSetup ( 151 ACPI_HANDLE Handle, 152 UINT32 Function, 153 void *HandlerContext, 154 void **RegionContext) 155{ 156 ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle; 157 ACPI_MEM_SPACE_CONTEXT *LocalRegionContext; 158 159 160 ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup); 161 162 163 if (Function == ACPI_REGION_DEACTIVATE) 164 { 165 if (*RegionContext) 166 { 167 LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext; 168 169 /* Delete a cached mapping if present */ 170 171 if (LocalRegionContext->MappedLength) 172 { 173 AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress, 174 LocalRegionContext->MappedLength); 175 } 176 ACPI_FREE (LocalRegionContext); 177 *RegionContext = NULL; 178 } 179 return_ACPI_STATUS (AE_OK); 180 } 181 182 /* Create a new context */ 183 184 LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT)); 185 if (!(LocalRegionContext)) 186 { 187 return_ACPI_STATUS (AE_NO_MEMORY); 188 } 189 190 /* Save the region length and address for use in the handler */ 191 192 LocalRegionContext->Length = RegionDesc->Region.Length; 193 LocalRegionContext->Address = RegionDesc->Region.Address; 194 195 *RegionContext = LocalRegionContext; 196 return_ACPI_STATUS (AE_OK); 197} 198 199 200/******************************************************************************* 201 * 202 * FUNCTION: AcpiEvIoSpaceRegionSetup 203 * 204 * PARAMETERS: Handle - Region we are interested in 205 * Function - Start or stop 206 * HandlerContext - Address space handler context 207 * RegionContext - Region specific context 208 * 209 * RETURN: Status 210 * 211 * DESCRIPTION: Setup a IO operation region 212 * 213 ******************************************************************************/ 214 215ACPI_STATUS 216AcpiEvIoSpaceRegionSetup ( 217 ACPI_HANDLE Handle, 218 UINT32 Function, 219 void *HandlerContext, 220 void **RegionContext) 221{ 222 ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup); 223 224 225 if (Function == ACPI_REGION_DEACTIVATE) 226 { 227 *RegionContext = NULL; 228 } 229 else 230 { 231 *RegionContext = HandlerContext; 232 } 233 234 return_ACPI_STATUS (AE_OK); 235} 236 237 238/******************************************************************************* 239 * 240 * FUNCTION: AcpiEvPciConfigRegionSetup 241 * 242 * PARAMETERS: Handle - Region we are interested in 243 * Function - Start or stop 244 * HandlerContext - Address space handler context 245 * RegionContext - Region specific context 246 * 247 * RETURN: Status 248 * 249 * DESCRIPTION: Setup a PCI_Config operation region 250 * 251 * MUTEX: Assumes namespace is not locked 252 * 253 ******************************************************************************/ 254 255ACPI_STATUS 256AcpiEvPciConfigRegionSetup ( 257 ACPI_HANDLE Handle, 258 UINT32 Function, 259 void *HandlerContext, 260 void **RegionContext) 261{ 262 ACPI_STATUS Status = AE_OK; 263 ACPI_INTEGER PciValue; 264 ACPI_PCI_ID *PciId = *RegionContext; 265 ACPI_OPERAND_OBJECT *HandlerObj; 266 ACPI_NAMESPACE_NODE *ParentNode; 267 ACPI_NAMESPACE_NODE *PciRootNode; 268 ACPI_NAMESPACE_NODE *PciDeviceNode; 269 ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; 270 271 272 ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup); 273 274 275 HandlerObj = RegionObj->Region.Handler; 276 if (!HandlerObj) 277 { 278 /* 279 * No installed handler. This shouldn't happen because the dispatch 280 * routine checks before we get here, but we check again just in case. 281 */ 282 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 283 "Attempting to init a region %p, with no handler\n", RegionObj)); 284 return_ACPI_STATUS (AE_NOT_EXIST); 285 } 286 287 *RegionContext = NULL; 288 if (Function == ACPI_REGION_DEACTIVATE) 289 { 290 if (PciId) 291 { 292 ACPI_FREE (PciId); 293 } 294 return_ACPI_STATUS (Status); 295 } 296 297 ParentNode = AcpiNsGetParentNode (RegionObj->Region.Node); 298 299 /* 300 * Get the _SEG and _BBN values from the device upon which the handler 301 * is installed. 302 * 303 * We need to get the _SEG and _BBN objects relative to the PCI BUS device. 304 * This is the device the handler has been registered to handle. 305 */ 306 307 /* 308 * If the AddressSpace.Node is still pointing to the root, we need 309 * to scan upward for a PCI Root bridge and re-associate the OpRegion 310 * handlers with that device. 311 */ 312 if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode) 313 { 314 /* Start search from the parent object */ 315 316 PciRootNode = ParentNode; 317 while (PciRootNode != AcpiGbl_RootNode) 318 { 319 /* Get the _HID/_CID in order to detect a RootBridge */ 320 321 if (AcpiEvIsPciRootBridge (PciRootNode)) 322 { 323 /* Install a handler for this PCI root bridge */ 324 325 Status = AcpiInstallAddressSpaceHandler ( 326 (ACPI_HANDLE) PciRootNode, 327 ACPI_ADR_SPACE_PCI_CONFIG, 328 ACPI_DEFAULT_HANDLER, NULL, NULL); 329 if (ACPI_FAILURE (Status)) 330 { 331 if (Status == AE_SAME_HANDLER) 332 { 333 /* 334 * It is OK if the handler is already installed on the 335 * root bridge. Still need to return a context object 336 * for the new PCI_Config operation region, however. 337 */ 338 Status = AE_OK; 339 } 340 else 341 { 342 ACPI_EXCEPTION ((AE_INFO, Status, 343 "Could not install PciConfig handler " 344 "for Root Bridge %4.4s", 345 AcpiUtGetNodeName (PciRootNode))); 346 } 347 } 348 break; 349 } 350 351 PciRootNode = AcpiNsGetParentNode (PciRootNode); 352 } 353 354 /* PCI root bridge not found, use namespace root node */ 355 } 356 else 357 { 358 PciRootNode = HandlerObj->AddressSpace.Node; 359 } 360 361 /* 362 * If this region is now initialized, we are done. 363 * (InstallAddressSpaceHandler could have initialized it) 364 */ 365 if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) 366 { 367 return_ACPI_STATUS (AE_OK); 368 } 369 370 /* Region is still not initialized. Create a new context */ 371 372 PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID)); 373 if (!PciId) 374 { 375 return_ACPI_STATUS (AE_NO_MEMORY); 376 } 377 378 /* 379 * For PCI_Config space access, we need the segment, bus, device and 380 * function numbers. Acquire them here. 381 * 382 * Find the parent device object. (This allows the operation region to be 383 * within a subscope under the device, such as a control method.) 384 */ 385 PciDeviceNode = RegionObj->Region.Node; 386 while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE)) 387 { 388 PciDeviceNode = AcpiNsGetParentNode (PciDeviceNode); 389 } 390 391 if (!PciDeviceNode) 392 { 393 ACPI_FREE (PciId); 394 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 395 } 396 397 /* 398 * Get the PCI device and function numbers from the _ADR object contained 399 * in the parent's scope. 400 */ 401 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 402 PciDeviceNode, &PciValue); 403 404 /* 405 * The default is zero, and since the allocation above zeroed the data, 406 * just do nothing on failure. 407 */ 408 if (ACPI_SUCCESS (Status)) 409 { 410 PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue)); 411 PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue)); 412 } 413 414 /* The PCI segment number comes from the _SEG method */ 415 416 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, 417 PciRootNode, &PciValue); 418 if (ACPI_SUCCESS (Status)) 419 { 420 PciId->Segment = ACPI_LOWORD (PciValue); 421 } 422 423 /* The PCI bus number comes from the _BBN method */ 424 425 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, 426 PciRootNode, &PciValue); 427 if (ACPI_SUCCESS (Status)) 428 { 429 PciId->Bus = ACPI_LOWORD (PciValue); 430 } 431 432 /* Complete this device's PciId */ 433 434 AcpiOsDerivePciId (PciRootNode, RegionObj->Region.Node, &PciId); 435 436 *RegionContext = PciId; 437 return_ACPI_STATUS (AE_OK); 438} 439 440 441/******************************************************************************* 442 * 443 * FUNCTION: AcpiEvIsPciRootBridge 444 * 445 * PARAMETERS: Node - Device node being examined 446 * 447 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge 448 * 449 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by 450 * examining the _HID and _CID for the device. 451 * 452 ******************************************************************************/ 453 454static BOOLEAN 455AcpiEvIsPciRootBridge ( 456 ACPI_NAMESPACE_NODE *Node) 457{ 458 ACPI_STATUS Status; 459 ACPI_DEVICE_ID *Hid; 460 ACPI_DEVICE_ID_LIST *Cid; 461 UINT32 i; 462 BOOLEAN Match; 463 464 465 /* Get the _HID and check for a PCI Root Bridge */ 466 467 Status = AcpiUtExecute_HID (Node, &Hid); 468 if (ACPI_FAILURE (Status)) 469 { 470 return (FALSE); 471 } 472 473 Match = AcpiUtIsPciRootBridge (Hid->String); 474 ACPI_FREE (Hid); 475 476 if (Match) 477 { 478 return (TRUE); 479 } 480 481 /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */ 482 483 Status = AcpiUtExecute_CID (Node, &Cid); 484 if (ACPI_FAILURE (Status)) 485 { 486 return (FALSE); 487 } 488 489 /* Check all _CIDs in the returned list */ 490 491 for (i = 0; i < Cid->Count; i++) 492 { 493 if (AcpiUtIsPciRootBridge (Cid->Ids[i].String)) 494 { 495 ACPI_FREE (Cid); 496 return (TRUE); 497 } 498 } 499 500 ACPI_FREE (Cid); 501 return (FALSE); 502} 503 504 505/******************************************************************************* 506 * 507 * FUNCTION: AcpiEvPciBarRegionSetup 508 * 509 * PARAMETERS: Handle - Region we are interested in 510 * Function - Start or stop 511 * HandlerContext - Address space handler context 512 * RegionContext - Region specific context 513 * 514 * RETURN: Status 515 * 516 * DESCRIPTION: Setup a PciBAR operation region 517 * 518 * MUTEX: Assumes namespace is not locked 519 * 520 ******************************************************************************/ 521 522ACPI_STATUS 523AcpiEvPciBarRegionSetup ( 524 ACPI_HANDLE Handle, 525 UINT32 Function, 526 void *HandlerContext, 527 void **RegionContext) 528{ 529 ACPI_FUNCTION_TRACE (EvPciBarRegionSetup); 530 531 532 return_ACPI_STATUS (AE_OK); 533} 534 535 536/******************************************************************************* 537 * 538 * FUNCTION: AcpiEvCmosRegionSetup 539 * 540 * PARAMETERS: Handle - Region we are interested in 541 * Function - Start or stop 542 * HandlerContext - Address space handler context 543 * RegionContext - Region specific context 544 * 545 * RETURN: Status 546 * 547 * DESCRIPTION: Setup a CMOS operation region 548 * 549 * MUTEX: Assumes namespace is not locked 550 * 551 ******************************************************************************/ 552 553ACPI_STATUS 554AcpiEvCmosRegionSetup ( 555 ACPI_HANDLE Handle, 556 UINT32 Function, 557 void *HandlerContext, 558 void **RegionContext) 559{ 560 ACPI_FUNCTION_TRACE (EvCmosRegionSetup); 561 562 563 return_ACPI_STATUS (AE_OK); 564} 565 566 567/******************************************************************************* 568 * 569 * FUNCTION: AcpiEvDefaultRegionSetup 570 * 571 * PARAMETERS: Handle - Region we are interested in 572 * Function - Start or stop 573 * HandlerContext - Address space handler context 574 * RegionContext - Region specific context 575 * 576 * RETURN: Status 577 * 578 * DESCRIPTION: Default region initialization 579 * 580 ******************************************************************************/ 581 582ACPI_STATUS 583AcpiEvDefaultRegionSetup ( 584 ACPI_HANDLE Handle, 585 UINT32 Function, 586 void *HandlerContext, 587 void **RegionContext) 588{ 589 ACPI_FUNCTION_TRACE (EvDefaultRegionSetup); 590 591 592 if (Function == ACPI_REGION_DEACTIVATE) 593 { 594 *RegionContext = NULL; 595 } 596 else 597 { 598 *RegionContext = HandlerContext; 599 } 600 601 return_ACPI_STATUS (AE_OK); 602} 603 604 605/******************************************************************************* 606 * 607 * FUNCTION: AcpiEvInitializeRegion 608 * 609 * PARAMETERS: RegionObj - Region we are initializing 610 * AcpiNsLocked - Is namespace locked? 611 * 612 * RETURN: Status 613 * 614 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them 615 * for execution at a later time 616 * 617 * Get the appropriate address space handler for a newly 618 * created region. 619 * 620 * This also performs address space specific initialization. For 621 * example, PCI regions must have an _ADR object that contains 622 * a PCI address in the scope of the definition. This address is 623 * required to perform an access to PCI config space. 624 * 625 * MUTEX: Interpreter should be unlocked, because we may run the _REG 626 * method for this region. 627 * 628 ******************************************************************************/ 629 630ACPI_STATUS 631AcpiEvInitializeRegion ( 632 ACPI_OPERAND_OBJECT *RegionObj, 633 BOOLEAN AcpiNsLocked) 634{ 635 ACPI_OPERAND_OBJECT *HandlerObj; 636 ACPI_OPERAND_OBJECT *ObjDesc; 637 ACPI_ADR_SPACE_TYPE SpaceId; 638 ACPI_NAMESPACE_NODE *Node; 639 ACPI_STATUS Status; 640 ACPI_NAMESPACE_NODE *MethodNode; 641 ACPI_NAME *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG; 642 ACPI_OPERAND_OBJECT *RegionObj2; 643 644 645 ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked); 646 647 648 if (!RegionObj) 649 { 650 return_ACPI_STATUS (AE_BAD_PARAMETER); 651 } 652 653 if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED) 654 { 655 return_ACPI_STATUS (AE_OK); 656 } 657 658 RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); 659 if (!RegionObj2) 660 { 661 return_ACPI_STATUS (AE_NOT_EXIST); 662 } 663 664 Node = AcpiNsGetParentNode (RegionObj->Region.Node); 665 SpaceId = RegionObj->Region.SpaceId; 666 667 /* Setup defaults */ 668 669 RegionObj->Region.Handler = NULL; 670 RegionObj2->Extra.Method_REG = NULL; 671 RegionObj->Common.Flags &= ~(AOPOBJ_SETUP_COMPLETE); 672 RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED; 673 674 /* Find any "_REG" method associated with this region definition */ 675 676 Status = AcpiNsSearchOneScope ( 677 *RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode); 678 if (ACPI_SUCCESS (Status)) 679 { 680 /* 681 * The _REG method is optional and there can be only one per region 682 * definition. This will be executed when the handler is attached 683 * or removed 684 */ 685 RegionObj2->Extra.Method_REG = MethodNode; 686 } 687 688 /* 689 * The following loop depends upon the root Node having no parent 690 * ie: AcpiGbl_RootNode->ParentEntry being set to NULL 691 */ 692 while (Node) 693 { 694 /* Check to see if a handler exists */ 695 696 HandlerObj = NULL; 697 ObjDesc = AcpiNsGetAttachedObject (Node); 698 if (ObjDesc) 699 { 700 /* Can only be a handler if the object exists */ 701 702 switch (Node->Type) 703 { 704 case ACPI_TYPE_DEVICE: 705 706 HandlerObj = ObjDesc->Device.Handler; 707 break; 708 709 case ACPI_TYPE_PROCESSOR: 710 711 HandlerObj = ObjDesc->Processor.Handler; 712 break; 713 714 case ACPI_TYPE_THERMAL: 715 716 HandlerObj = ObjDesc->ThermalZone.Handler; 717 break; 718
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