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
| 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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