1 /******************************************************************************
2 *
3 * Module Name: nsinit - namespace initialization
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpi.h"
153 #include "accommon.h"
154 #include "acnamesp.h"
155 #include "acdispat.h"
156 #include "acinterp.h"
157 #include "acevents.h"
158
159 #define _COMPONENT ACPI_NAMESPACE
160 ACPI_MODULE_NAME ("nsinit")
161
162 /* Local prototypes */
163
164 static ACPI_STATUS
165 AcpiNsInitOneObject (
166 ACPI_HANDLE ObjHandle,
167 UINT32 Level,
168 void *Context,
169 void **ReturnValue);
170
171 static ACPI_STATUS
172 AcpiNsInitOneDevice (
173 ACPI_HANDLE ObjHandle,
174 UINT32 NestingLevel,
175 void *Context,
176 void **ReturnValue);
177
178 static ACPI_STATUS
179 AcpiNsFindIniMethods (
180 ACPI_HANDLE ObjHandle,
181 UINT32 NestingLevel,
182 void *Context,
183 void **ReturnValue);
184
185
186 /*******************************************************************************
187 *
188 * FUNCTION: AcpiNsInitializeObjects
189 *
190 * PARAMETERS: None
191 *
192 * RETURN: Status
193 *
194 * DESCRIPTION: Walk the entire namespace and perform any necessary
195 * initialization on the objects found therein
196 *
197 ******************************************************************************/
198
199 ACPI_STATUS
AcpiNsInitializeObjects(void)200 AcpiNsInitializeObjects (
201 void)
202 {
203 ACPI_STATUS Status;
204 ACPI_INIT_WALK_INFO Info;
205
206
207 ACPI_FUNCTION_TRACE (NsInitializeObjects);
208
209
210 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
211 "[Init] Completing Initialization of ACPI Objects\n"));
212 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
213 "**** Starting initialization of namespace objects ****\n"));
214 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
215 "Final data object initialization: "));
216
217 /* Clear the info block */
218
219 memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
220
221 /* Walk entire namespace from the supplied root */
222
223 /*
224 * TBD: will become ACPI_TYPE_PACKAGE as this type object
225 * is now the only one that supports deferred initialization
226 * (forward references).
227 */
228 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
229 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, &Info, NULL);
230 if (ACPI_FAILURE (Status))
231 {
232 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
233 }
234
235 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
236 "Namespace contains %u (0x%X) objects\n",
237 Info.ObjectCount,
238 Info.ObjectCount));
239
240 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
241 "%u Control Methods found\n%u Op Regions found\n",
242 Info.MethodCount, Info.OpRegionCount));
243
244 return_ACPI_STATUS (AE_OK);
245 }
246
247
248 /*******************************************************************************
249 *
250 * FUNCTION: AcpiNsInitializeDevices
251 *
252 * PARAMETERS: None
253 *
254 * RETURN: ACPI_STATUS
255 *
256 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
257 * This means running _INI on all present devices.
258 *
259 * Note: We install PCI config space handler on region access,
260 * not here.
261 *
262 ******************************************************************************/
263
264 ACPI_STATUS
AcpiNsInitializeDevices(UINT32 Flags)265 AcpiNsInitializeDevices (
266 UINT32 Flags)
267 {
268 ACPI_STATUS Status = AE_OK;
269 ACPI_DEVICE_WALK_INFO Info;
270 ACPI_HANDLE Handle;
271
272
273 ACPI_FUNCTION_TRACE (NsInitializeDevices);
274
275
276 if (!(Flags & ACPI_NO_DEVICE_INIT))
277 {
278 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
279 "[Init] Initializing ACPI Devices\n"));
280
281 /* Init counters */
282
283 Info.DeviceCount = 0;
284 Info.Num_STA = 0;
285 Info.Num_INI = 0;
286
287 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
288 "Initializing Device/Processor/Thermal objects "
289 "and executing _INI/_STA methods:\n"));
290
291 /* Tree analysis: find all subtrees that contain _INI methods */
292
293 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
294 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
295 if (ACPI_FAILURE (Status))
296 {
297 goto ErrorExit;
298 }
299
300 /* Allocate the evaluation information block */
301
302 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
303 if (!Info.EvaluateInfo)
304 {
305 Status = AE_NO_MEMORY;
306 goto ErrorExit;
307 }
308
309 /*
310 * Execute the "global" _INI method that may appear at the root.
311 * This support is provided for Windows compatibility (Vista+) and
312 * is not part of the ACPI specification.
313 */
314 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
315 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
316 Info.EvaluateInfo->Parameters = NULL;
317 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
318
319 Status = AcpiNsEvaluate (Info.EvaluateInfo);
320 if (ACPI_SUCCESS (Status))
321 {
322 Info.Num_INI++;
323 }
324
325 /*
326 * Execute \_SB._INI.
327 * There appears to be a strict order requirement for \_SB._INI,
328 * which should be evaluated before any _REG evaluations.
329 */
330 Status = AcpiGetHandle (NULL, "\\_SB", &Handle);
331 if (ACPI_SUCCESS (Status))
332 {
333 memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO));
334 Info.EvaluateInfo->PrefixNode = Handle;
335 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
336 Info.EvaluateInfo->Parameters = NULL;
337 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
338
339 Status = AcpiNsEvaluate (Info.EvaluateInfo);
340 if (ACPI_SUCCESS (Status))
341 {
342 Info.Num_INI++;
343 }
344 }
345 }
346
347 /*
348 * Run all _REG methods
349 *
350 * Note: Any objects accessed by the _REG methods will be automatically
351 * initialized, even if they contain executable AML (see the call to
352 * AcpiNsInitializeObjects below).
353 *
354 * Note: According to the ACPI specification, we actually needn't execute
355 * _REG for SystemMemory/SystemIo operation regions, but for PCI_Config
356 * operation regions, it is required to evaluate _REG for those on a PCI
357 * root bus that doesn't contain _BBN object. So this code is kept here
358 * in order not to break things.
359 */
360 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
361 {
362 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
363 "[Init] Executing _REG OpRegion methods\n"));
364
365 Status = AcpiEvInitializeOpRegions ();
366 if (ACPI_FAILURE (Status))
367 {
368 goto ErrorExit;
369 }
370 }
371
372 if (!(Flags & ACPI_NO_DEVICE_INIT))
373 {
374 /* Walk namespace to execute all _INIs on present devices */
375
376 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
377 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
378
379 /*
380 * Any _OSI requests should be completed by now. If the BIOS has
381 * requested any Windows OSI strings, we will always truncate
382 * I/O addresses to 16 bits -- for Windows compatibility.
383 */
384 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
385 {
386 AcpiGbl_TruncateIoAddresses = TRUE;
387 }
388
389 ACPI_FREE (Info.EvaluateInfo);
390 if (ACPI_FAILURE (Status))
391 {
392 goto ErrorExit;
393 }
394
395 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
396 " Executed %u _INI methods requiring %u _STA executions "
397 "(examined %u objects)\n",
398 Info.Num_INI, Info.Num_STA, Info.DeviceCount));
399 }
400
401 return_ACPI_STATUS (Status);
402
403
404 ErrorExit:
405 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
406 return_ACPI_STATUS (Status);
407 }
408
409
410 /*******************************************************************************
411 *
412 * FUNCTION: AcpiNsInitOnePackage
413 *
414 * PARAMETERS: ObjHandle - Node
415 * Level - Current nesting level
416 * Context - Not used
417 * ReturnValue - Not used
418 *
419 * RETURN: Status
420 *
421 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every package
422 * within the namespace. Used during dynamic load of an SSDT.
423 *
424 ******************************************************************************/
425
426 ACPI_STATUS
AcpiNsInitOnePackage(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)427 AcpiNsInitOnePackage (
428 ACPI_HANDLE ObjHandle,
429 UINT32 Level,
430 void *Context,
431 void **ReturnValue)
432 {
433 ACPI_STATUS Status;
434 ACPI_OPERAND_OBJECT *ObjDesc;
435 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
436
437
438 ObjDesc = AcpiNsGetAttachedObject (Node);
439 if (!ObjDesc)
440 {
441 return (AE_OK);
442 }
443
444 /* Exit if package is already initialized */
445
446 if (ObjDesc->Package.Flags & AOPOBJ_DATA_VALID)
447 {
448 return (AE_OK);
449 }
450
451 Status = AcpiDsGetPackageArguments (ObjDesc);
452 if (ACPI_FAILURE (Status))
453 {
454 return (AE_OK);
455 }
456
457 Status = AcpiUtWalkPackageTree (ObjDesc, NULL, AcpiDsInitPackageElement,
458 NULL);
459 if (ACPI_FAILURE (Status))
460 {
461 return (AE_OK);
462 }
463
464 ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
465 return (AE_OK);
466 }
467
468
469 /*******************************************************************************
470 *
471 * FUNCTION: AcpiNsInitOneObject
472 *
473 * PARAMETERS: ObjHandle - Node
474 * Level - Current nesting level
475 * Context - Points to a init info struct
476 * ReturnValue - Not used
477 *
478 * RETURN: Status
479 *
480 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
481 * within the namespace.
482 *
483 * Currently, the only objects that require initialization are:
484 * 1) Methods
485 * 2) Op Regions
486 *
487 ******************************************************************************/
488
489 static ACPI_STATUS
AcpiNsInitOneObject(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)490 AcpiNsInitOneObject (
491 ACPI_HANDLE ObjHandle,
492 UINT32 Level,
493 void *Context,
494 void **ReturnValue)
495 {
496 ACPI_OBJECT_TYPE Type;
497 ACPI_STATUS Status = AE_OK;
498 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context;
499 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
500 ACPI_OPERAND_OBJECT *ObjDesc;
501
502
503 ACPI_FUNCTION_NAME (NsInitOneObject);
504
505
506 Info->ObjectCount++;
507
508 /* And even then, we are only interested in a few object types */
509
510 Type = AcpiNsGetType (ObjHandle);
511 ObjDesc = AcpiNsGetAttachedObject (Node);
512 if (!ObjDesc)
513 {
514 return (AE_OK);
515 }
516
517 /* Increment counters for object types we are looking for */
518
519 switch (Type)
520 {
521 case ACPI_TYPE_REGION:
522
523 Info->OpRegionCount++;
524 break;
525
526 case ACPI_TYPE_BUFFER_FIELD:
527
528 Info->FieldCount++;
529 break;
530
531 case ACPI_TYPE_LOCAL_BANK_FIELD:
532
533 Info->FieldCount++;
534 break;
535
536 case ACPI_TYPE_BUFFER:
537
538 Info->BufferCount++;
539 break;
540
541 case ACPI_TYPE_PACKAGE:
542
543 Info->PackageCount++;
544 break;
545
546 default:
547
548 /* No init required, just exit now */
549
550 return (AE_OK);
551 }
552
553 /* If the object is already initialized, nothing else to do */
554
555 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
556 {
557 return (AE_OK);
558 }
559
560 /* Must lock the interpreter before executing AML code */
561
562 AcpiExEnterInterpreter ();
563
564 /*
565 * Only initialization of Package objects can be deferred, in order
566 * to support forward references.
567 */
568 switch (Type)
569 {
570 case ACPI_TYPE_LOCAL_BANK_FIELD:
571
572 /* TBD: BankFields do not require deferred init, remove this code */
573
574 Info->FieldInit++;
575 Status = AcpiDsGetBankFieldArguments (ObjDesc);
576 break;
577
578 case ACPI_TYPE_PACKAGE:
579
580 /* Complete the initialization/resolution of the package object */
581
582 Info->PackageInit++;
583 Status = AcpiNsInitOnePackage (ObjHandle, Level, NULL, NULL);
584 break;
585
586 default:
587
588 /* No other types should get here */
589
590 Status = AE_TYPE;
591 ACPI_EXCEPTION ((AE_INFO, Status,
592 "Opcode is not deferred [%4.4s] (%s)",
593 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
594 break;
595 }
596
597 if (ACPI_FAILURE (Status))
598 {
599 ACPI_EXCEPTION ((AE_INFO, Status,
600 "Could not execute arguments for [%4.4s] (%s)",
601 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
602 }
603
604 /*
605 * We ignore errors from above, and always return OK, since we don't want
606 * to abort the walk on any single error.
607 */
608 AcpiExExitInterpreter ();
609 return (AE_OK);
610 }
611
612
613 /*******************************************************************************
614 *
615 * FUNCTION: AcpiNsFindIniMethods
616 *
617 * PARAMETERS: ACPI_WALK_CALLBACK
618 *
619 * RETURN: ACPI_STATUS
620 *
621 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
622 * device/processor/thermal objects, and marks the entire subtree
623 * with a SUBTREE_HAS_INI flag. This flag is used during the
624 * subsequent device initialization walk to avoid entire subtrees
625 * that do not contain an _INI.
626 *
627 ******************************************************************************/
628
629 static ACPI_STATUS
AcpiNsFindIniMethods(ACPI_HANDLE ObjHandle,UINT32 NestingLevel,void * Context,void ** ReturnValue)630 AcpiNsFindIniMethods (
631 ACPI_HANDLE ObjHandle,
632 UINT32 NestingLevel,
633 void *Context,
634 void **ReturnValue)
635 {
636 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
637 ACPI_NAMESPACE_NODE *Node;
638 ACPI_NAMESPACE_NODE *ParentNode;
639
640
641 /* Keep count of device/processor/thermal objects */
642
643 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
644 if ((Node->Type == ACPI_TYPE_DEVICE) ||
645 (Node->Type == ACPI_TYPE_PROCESSOR) ||
646 (Node->Type == ACPI_TYPE_THERMAL))
647 {
648 Info->DeviceCount++;
649 return (AE_OK);
650 }
651
652 /* We are only looking for methods named _INI */
653
654 if (!ACPI_COMPARE_NAMESEG (Node->Name.Ascii, METHOD_NAME__INI))
655 {
656 return (AE_OK);
657 }
658
659 /*
660 * The only _INI methods that we care about are those that are
661 * present under Device, Processor, and Thermal objects.
662 */
663 ParentNode = Node->Parent;
664 switch (ParentNode->Type)
665 {
666 case ACPI_TYPE_DEVICE:
667 case ACPI_TYPE_PROCESSOR:
668 case ACPI_TYPE_THERMAL:
669
670 /* Mark parent and bubble up the INI present flag to the root */
671
672 while (ParentNode)
673 {
674 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
675 ParentNode = ParentNode->Parent;
676 }
677 break;
678
679 default:
680
681 break;
682 }
683
684 return (AE_OK);
685 }
686
687
688 /*******************************************************************************
689 *
690 * FUNCTION: AcpiNsInitOneDevice
691 *
692 * PARAMETERS: ACPI_WALK_CALLBACK
693 *
694 * RETURN: ACPI_STATUS
695 *
696 * DESCRIPTION: This is called once per device soon after ACPI is enabled
697 * to initialize each device. It determines if the device is
698 * present, and if so, calls _INI.
699 *
700 ******************************************************************************/
701
702 static ACPI_STATUS
AcpiNsInitOneDevice(ACPI_HANDLE ObjHandle,UINT32 NestingLevel,void * Context,void ** ReturnValue)703 AcpiNsInitOneDevice (
704 ACPI_HANDLE ObjHandle,
705 UINT32 NestingLevel,
706 void *Context,
707 void **ReturnValue)
708 {
709 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
710 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
711 UINT32 Flags;
712 ACPI_STATUS Status;
713 ACPI_NAMESPACE_NODE *DeviceNode;
714
715
716 ACPI_FUNCTION_TRACE (NsInitOneDevice);
717
718
719 /* We are interested in Devices, Processors and ThermalZones only */
720
721 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
722 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
723 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
724 (DeviceNode->Type != ACPI_TYPE_THERMAL))
725 {
726 return_ACPI_STATUS (AE_OK);
727 }
728
729 /*
730 * Because of an earlier namespace analysis, all subtrees that contain an
731 * _INI method are tagged.
732 *
733 * If this device subtree does not contain any _INI methods, we
734 * can exit now and stop traversing this entire subtree.
735 */
736 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
737 {
738 return_ACPI_STATUS (AE_CTRL_DEPTH);
739 }
740
741 /*
742 * Run _STA to determine if this device is present and functioning. We
743 * must know this information for two important reasons (from ACPI spec):
744 *
745 * 1) We can only run _INI if the device is present.
746 * 2) We must abort the device tree walk on this subtree if the device is
747 * not present and is not functional (we will not examine the children)
748 *
749 * The _STA method is not required to be present under the device, we
750 * assume the device is present if _STA does not exist.
751 */
752 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
753 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
754
755 Status = AcpiUtExecute_STA (DeviceNode, &Flags);
756 if (ACPI_FAILURE (Status))
757 {
758 /* Ignore error and move on to next device */
759
760 return_ACPI_STATUS (AE_OK);
761 }
762
763 /*
764 * Flags == -1 means that _STA was not found. In this case, we assume that
765 * the device is both present and functional.
766 *
767 * From the ACPI spec, description of _STA:
768 *
769 * "If a device object (including the processor object) does not have an
770 * _STA object, then OSPM assumes that all of the above bits are set (in
771 * other words, the device is present, ..., and functioning)"
772 */
773 if (Flags != ACPI_UINT32_MAX)
774 {
775 WalkInfo->Num_STA++;
776 }
777
778 /*
779 * Examine the PRESENT and FUNCTIONING status bits
780 *
781 * Note: ACPI spec does not seem to specify behavior for the present but
782 * not functioning case, so we assume functioning if present.
783 */
784 if (!(Flags & ACPI_STA_DEVICE_PRESENT))
785 {
786 /* Device is not present, we must examine the Functioning bit */
787
788 if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
789 {
790 /*
791 * Device is not present but is "functioning". In this case,
792 * we will not run _INI, but we continue to examine the children
793 * of this device.
794 *
795 * From the ACPI spec, description of _STA: (Note - no mention
796 * of whether to run _INI or not on the device in question)
797 *
798 * "_STA may return bit 0 clear (not present) with bit 3 set
799 * (device is functional). This case is used to indicate a valid
800 * device for which no device driver should be loaded (for example,
801 * a bridge device.) Children of this device may be present and
802 * valid. OSPM should continue enumeration below a device whose
803 * _STA returns this bit combination"
804 */
805 return_ACPI_STATUS (AE_OK);
806 }
807 else
808 {
809 /*
810 * Device is not present and is not functioning. We must abort the
811 * walk of this subtree immediately -- don't look at the children
812 * of such a device.
813 *
814 * From the ACPI spec, description of _INI:
815 *
816 * "If the _STA method indicates that the device is not present,
817 * OSPM will not run the _INI and will not examine the children
818 * of the device for _INI methods"
819 */
820 return_ACPI_STATUS (AE_CTRL_DEPTH);
821 }
822 }
823
824 /*
825 * The device is present or is assumed present if no _STA exists.
826 * Run the _INI if it exists (not required to exist)
827 *
828 * Note: We know there is an _INI within this subtree, but it may not be
829 * under this particular device, it may be lower in the branch.
830 */
831 if (!ACPI_COMPARE_NAMESEG (DeviceNode->Name.Ascii, "_SB_") ||
832 DeviceNode->Parent != AcpiGbl_RootNode)
833 {
834 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
835 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
836
837 memset (Info, 0, sizeof (ACPI_EVALUATE_INFO));
838 Info->PrefixNode = DeviceNode;
839 Info->RelativePathname = METHOD_NAME__INI;
840 Info->Parameters = NULL;
841 Info->Flags = ACPI_IGNORE_RETURN_VALUE;
842
843 Status = AcpiNsEvaluate (Info);
844 if (ACPI_SUCCESS (Status))
845 {
846 WalkInfo->Num_INI++;
847 }
848
849 #ifdef ACPI_DEBUG_OUTPUT
850 else if (Status != AE_NOT_FOUND)
851 {
852 /* Ignore error and move on to next device */
853
854 char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE);
855
856 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
857 ScopeName));
858 ACPI_FREE (ScopeName);
859 }
860 #endif
861 }
862
863 /* Ignore errors from above */
864
865 Status = AE_OK;
866
867 /*
868 * The _INI method has been run if present; call the Global Initialization
869 * Handler for this device.
870 */
871 if (AcpiGbl_InitHandler)
872 {
873 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
874 }
875
876 return_ACPI_STATUS (Status);
877 }
878
