1 /*******************************************************************************
3 * Module Name: nsaccess - Top-level functions for accessing ACPI namespace
5 ******************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************
116 * Alternatively, you may choose to be licensed under the terms of the
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
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.
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.
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.
150 *****************************************************************************/
152 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/amlcode.h>
155 #include <contrib/dev/acpica/include/acnamesp.h>
156 #include <contrib/dev/acpica/include/acdispat.h>
159 #define _COMPONENT ACPI_NAMESPACE
160 ACPI_MODULE_NAME ("nsaccess")
163 /*******************************************************************************
165 * FUNCTION: AcpiNsRootInitialize
171 * DESCRIPTION: Allocate and initialize the default root named objects
173 * MUTEX: Locks namespace for entire execution
175 ******************************************************************************/
178 AcpiNsRootInitialize (
182 const ACPI_PREDEFINED_NAMES *InitVal = NULL;
183 ACPI_NAMESPACE_NODE *NewNode;
184 ACPI_OPERAND_OBJECT *ObjDesc;
185 ACPI_STRING Val = NULL;
188 ACPI_FUNCTION_TRACE (NsRootInitialize);
191 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
192 if (ACPI_FAILURE (Status))
194 return_ACPI_STATUS (Status);
198 * The global root ptr is initially NULL, so a non-NULL value indicates
199 * that AcpiNsRootInitialize() has already been called; just return.
201 if (AcpiGbl_RootNode)
208 * Tell the rest of the subsystem that the root is initialized
209 * (This is OK because the namespace is locked)
211 AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;
213 /* Enter the pre-defined names in the name table */
215 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
216 "Entering predefined entries into namespace\n"));
218 for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)
220 /* _OSI is optional for now, will be permanent later */
222 if (!strcmp (InitVal->Name, "_OSI") && !AcpiGbl_CreateOsiMethod)
227 Status = AcpiNsLookup (NULL, ACPI_CAST_PTR (char, InitVal->Name),
228 InitVal->Type, ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH,
230 if (ACPI_FAILURE (Status))
232 ACPI_EXCEPTION ((AE_INFO, Status,
233 "Could not create predefined name %s",
239 * Name entered successfully. If entry in PreDefinedNames[] specifies
240 * an initial value, create the initial value.
244 Status = AcpiOsPredefinedOverride (InitVal, &Val);
245 if (ACPI_FAILURE (Status))
247 ACPI_ERROR ((AE_INFO,
248 "Could not override predefined %s",
258 * Entry requests an initial value, allocate a
261 ObjDesc = AcpiUtCreateInternalObject (InitVal->Type);
264 Status = AE_NO_MEMORY;
269 * Convert value string from table entry to
270 * internal representation. Only types actually
271 * used for initial values are implemented here.
273 switch (InitVal->Type)
275 case ACPI_TYPE_METHOD:
277 ObjDesc->Method.ParamCount = (UINT8) ACPI_TO_INTEGER (Val);
278 ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
280 #if defined (ACPI_ASL_COMPILER)
282 /* Save the parameter count for the iASL compiler */
284 NewNode->Value = ObjDesc->Method.ParamCount;
286 /* Mark this as a very SPECIAL method */
288 ObjDesc->Method.InfoFlags = ACPI_METHOD_INTERNAL_ONLY;
289 ObjDesc->Method.Dispatch.Implementation = AcpiUtOsiImplementation;
293 case ACPI_TYPE_INTEGER:
295 ObjDesc->Integer.Value = ACPI_TO_INTEGER (Val);
298 case ACPI_TYPE_STRING:
300 /* Build an object around the static string */
302 ObjDesc->String.Length = (UINT32) strlen (Val);
303 ObjDesc->String.Pointer = Val;
304 ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
307 case ACPI_TYPE_MUTEX:
309 ObjDesc->Mutex.Node = NewNode;
310 ObjDesc->Mutex.SyncLevel = (UINT8) (ACPI_TO_INTEGER (Val) - 1);
314 Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
315 if (ACPI_FAILURE (Status))
317 AcpiUtRemoveReference (ObjDesc);
321 /* Special case for ACPI Global Lock */
323 if (strcmp (InitVal->Name, "_GL_") == 0)
325 AcpiGbl_GlobalLockMutex = ObjDesc;
327 /* Create additional counting semaphore for global lock */
329 Status = AcpiOsCreateSemaphore (
330 1, 0, &AcpiGbl_GlobalLockSemaphore);
331 if (ACPI_FAILURE (Status))
333 AcpiUtRemoveReference (ObjDesc);
341 ACPI_ERROR ((AE_INFO, "Unsupported initial type value 0x%X",
343 AcpiUtRemoveReference (ObjDesc);
348 /* Store pointer to value descriptor in the Node */
350 Status = AcpiNsAttachObject (NewNode, ObjDesc,
351 ObjDesc->Common.Type);
353 /* Remove local reference to the object */
355 AcpiUtRemoveReference (ObjDesc);
361 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
363 /* Save a handle to "_GPE", it is always present */
365 if (ACPI_SUCCESS (Status))
367 Status = AcpiNsGetNode (NULL, "\\_GPE", ACPI_NS_NO_UPSEARCH,
368 &AcpiGbl_FadtGpeDevice);
371 return_ACPI_STATUS (Status);
375 /*******************************************************************************
377 * FUNCTION: AcpiNsLookup
379 * PARAMETERS: ScopeInfo - Current scope info block
380 * Pathname - Search pathname, in internal format
381 * (as represented in the AML stream)
382 * Type - Type associated with name
383 * InterpreterMode - IMODE_LOAD_PASS2 => add name if not found
384 * Flags - Flags describing the search restrictions
385 * WalkState - Current state of the walk
386 * ReturnNode - Where the Node is placed (if found
387 * or created successfully)
391 * DESCRIPTION: Find or enter the passed name in the name space.
392 * Log an error if name not found in Exec mode.
394 * MUTEX: Assumes namespace is locked.
396 ******************************************************************************/
400 ACPI_GENERIC_STATE *ScopeInfo,
402 ACPI_OBJECT_TYPE Type,
403 ACPI_INTERPRETER_MODE InterpreterMode,
405 ACPI_WALK_STATE *WalkState,
406 ACPI_NAMESPACE_NODE **ReturnNode)
409 char *Path = Pathname;
410 ACPI_NAMESPACE_NODE *PrefixNode;
411 ACPI_NAMESPACE_NODE *CurrentNode = NULL;
412 ACPI_NAMESPACE_NODE *ThisNode = NULL;
415 ACPI_NAME SimpleName;
416 ACPI_OBJECT_TYPE TypeToCheckFor;
417 ACPI_OBJECT_TYPE ThisSearchType;
418 UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT;
422 ACPI_FUNCTION_TRACE (NsLookup);
427 return_ACPI_STATUS (AE_BAD_PARAMETER);
431 ~(ACPI_NS_ERROR_IF_FOUND | ACPI_NS_OVERRIDE_IF_FOUND |
432 ACPI_NS_SEARCH_PARENT);
433 *ReturnNode = ACPI_ENTRY_NOT_FOUND;
434 AcpiGbl_NsLookupCount++;
436 if (!AcpiGbl_RootNode)
438 return_ACPI_STATUS (AE_NO_NAMESPACE);
441 /* Get the prefix scope. A null scope means use the root scope */
444 (!ScopeInfo->Scope.Node))
446 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
447 "Null scope prefix, using root node (%p)\n",
450 PrefixNode = AcpiGbl_RootNode;
454 PrefixNode = ScopeInfo->Scope.Node;
455 if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
457 ACPI_ERROR ((AE_INFO, "%p is not a namespace node [%s]",
458 PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));
459 return_ACPI_STATUS (AE_AML_INTERNAL);
462 if (!(Flags & ACPI_NS_PREFIX_IS_SCOPE))
465 * This node might not be a actual "scope" node (such as a
466 * Device/Method, etc.) It could be a Package or other object
467 * node. Backup up the tree to find the containing scope node.
469 while (!AcpiNsOpensScope (PrefixNode->Type) &&
470 PrefixNode->Type != ACPI_TYPE_ANY)
472 PrefixNode = PrefixNode->Parent;
477 /* Save type. TBD: may be no longer necessary */
479 TypeToCheckFor = Type;
482 * Begin examination of the actual pathname
486 /* A Null NamePath is allowed and refers to the root */
489 ThisNode = AcpiGbl_RootNode;
492 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
493 "Null Pathname (Zero segments), Flags=%X\n", Flags));
498 * Name pointer is valid (and must be in internal name format)
500 * Check for scope prefixes:
502 * As represented in the AML stream, a namepath consists of an
503 * optional scope prefix followed by a name segment part.
505 * If present, the scope prefix is either a Root Prefix (in
506 * which case the name is fully qualified), or one or more
507 * Parent Prefixes (in which case the name's scope is relative
508 * to the current scope).
510 if (*Path == (UINT8) AML_ROOT_PREFIX)
512 /* Pathname is fully qualified, start from the root */
514 ThisNode = AcpiGbl_RootNode;
515 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
517 /* Point to name segment part */
521 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
522 "Path is absolute from root [%p]\n", ThisNode));
526 /* Pathname is relative to current scope, start there */
528 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
529 "Searching relative to prefix scope [%4.4s] (%p)\n",
530 AcpiUtGetNodeName (PrefixNode), PrefixNode));
533 * Handle multiple Parent Prefixes (carat) by just getting
534 * the parent node for each prefix instance.
536 ThisNode = PrefixNode;
538 while (*Path == (UINT8) AML_PARENT_PREFIX)
540 /* Name is fully qualified, no search rules apply */
542 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
545 * Point past this prefix to the name segment
546 * part or the next Parent Prefix
550 /* Backup to the parent node */
553 ThisNode = ThisNode->Parent;
556 /* Current scope has no parent scope */
558 ACPI_ERROR ((AE_INFO,
559 "%s: Path has too many parent prefixes (^) "
560 "- reached beyond root node", Pathname));
561 return_ACPI_STATUS (AE_NOT_FOUND);
565 if (SearchParentFlag == ACPI_NS_NO_UPSEARCH)
567 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
568 "Search scope is [%4.4s], path has %u carat(s)\n",
569 AcpiUtGetNodeName (ThisNode), NumCarats));
574 * Determine the number of ACPI name segments in this pathname.
576 * The segment part consists of either:
577 * - A Null name segment (0)
578 * - A DualNamePrefix followed by two 4-byte name segments
579 * - A MultiNamePrefix followed by a byte indicating the
580 * number of segments and the segments themselves.
581 * - A single 4-byte name segment
583 * Examine the name prefix opcode, if any, to determine the number of
590 * Null name after a root or parent prefixes. We already
591 * have the correct target node and there are no name segments.
594 Type = ThisNode->Type;
596 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
597 "Prefix-only Pathname (Zero name segments), Flags=%X\n",
601 case AML_DUAL_NAME_PREFIX:
603 /* More than one NameSeg, search rules do not apply */
605 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
607 /* Two segments, point to first name segment */
612 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
613 "Dual Pathname (2 segments, Flags=%X)\n", Flags));
616 case AML_MULTI_NAME_PREFIX:
618 /* More than one NameSeg, search rules do not apply */
620 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
622 /* Extract segment count, point to first name segment */
625 NumSegments = (UINT32) (UINT8) *Path;
628 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
629 "Multi Pathname (%u Segments, Flags=%X)\n",
630 NumSegments, Flags));
635 * Not a Null name, no Dual or Multi prefix, hence there is
636 * only one name segment and Pathname is already pointing to it.
640 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
641 "Simple Pathname (1 segment, Flags=%X)\n", Flags));
645 ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path));
650 * Search namespace for each segment of the name. Loop through and
651 * verify (or add to the namespace) each name segment.
653 * The object type is significant only at the last name
654 * segment. (We don't care about the types along the path, only
655 * the type of the final target object.)
657 ThisSearchType = ACPI_TYPE_ANY;
658 CurrentNode = ThisNode;
659 while (NumSegments && CurrentNode)
664 /* This is the last segment, enable typechecking */
666 ThisSearchType = Type;
669 * Only allow automatic parent search (search rules) if the caller
670 * requested it AND we have a single, non-fully-qualified NameSeg
672 if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&
673 (Flags & ACPI_NS_SEARCH_PARENT))
675 LocalFlags |= ACPI_NS_SEARCH_PARENT;
678 /* Set error flag according to caller */
680 if (Flags & ACPI_NS_ERROR_IF_FOUND)
682 LocalFlags |= ACPI_NS_ERROR_IF_FOUND;
685 /* Set override flag according to caller */
687 if (Flags & ACPI_NS_OVERRIDE_IF_FOUND)
689 LocalFlags |= ACPI_NS_OVERRIDE_IF_FOUND;
693 /* Extract one ACPI name from the front of the pathname */
695 ACPI_MOVE_32_TO_32 (&SimpleName, Path);
697 /* Try to find the single (4 character) ACPI name */
699 Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,
700 InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
701 if (ACPI_FAILURE (Status))
703 if (Status == AE_NOT_FOUND)
705 /* Name not found in ACPI namespace */
707 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
708 "Name [%4.4s] not found in scope [%4.4s] %p\n",
709 (char *) &SimpleName, (char *) &CurrentNode->Name,
713 *ReturnNode = ThisNode;
714 return_ACPI_STATUS (Status);
717 /* More segments to follow? */
722 * If we have an alias to an object that opens a scope (such as a
723 * device or processor), we need to dereference the alias here so
724 * that we can access any children of the original node (via the
725 * remaining segments).
727 if (ThisNode->Type == ACPI_TYPE_LOCAL_ALIAS)
729 if (!ThisNode->Object)
731 return_ACPI_STATUS (AE_NOT_EXIST);
734 if (AcpiNsOpensScope (((ACPI_NAMESPACE_NODE *)
735 ThisNode->Object)->Type))
737 ThisNode = (ACPI_NAMESPACE_NODE *) ThisNode->Object;
742 /* Special handling for the last segment (NumSegments == 0) */
747 * Sanity typecheck of the target object:
749 * If 1) This is the last segment (NumSegments == 0)
750 * 2) And we are looking for a specific type
751 * (Not checking for TYPE_ANY)
752 * 3) Which is not an alias
753 * 4) Which is not a local type (TYPE_SCOPE)
754 * 5) And the type of target object is known (not TYPE_ANY)
755 * 6) And target object does not match what we are looking for
757 * Then we have a type mismatch. Just warn and ignore it.
759 if ((TypeToCheckFor != ACPI_TYPE_ANY) &&
760 (TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) &&
761 (TypeToCheckFor != ACPI_TYPE_LOCAL_METHOD_ALIAS) &&
762 (TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) &&
763 (ThisNode->Type != ACPI_TYPE_ANY) &&
764 (ThisNode->Type != TypeToCheckFor))
766 /* Complain about a type mismatch */
768 ACPI_WARNING ((AE_INFO,
769 "NsLookup: Type mismatch on %4.4s (%s), searching for (%s)",
770 ACPI_CAST_PTR (char, &SimpleName),
771 AcpiUtGetTypeName (ThisNode->Type),
772 AcpiUtGetTypeName (TypeToCheckFor)));
776 * If this is the last name segment and we are not looking for a
777 * specific type, but the type of found object is known, use that
778 * type to (later) see if it opens a scope.
780 if (Type == ACPI_TYPE_ANY)
782 Type = ThisNode->Type;
786 /* Point to next name segment and make this node current */
788 Path += ACPI_NAME_SIZE;
789 CurrentNode = ThisNode;
792 /* Always check if we need to open a new scope */
794 if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState))
797 * If entry is a type which opens a scope, push the new scope on the
800 if (AcpiNsOpensScope (Type))
802 Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState);
803 if (ACPI_FAILURE (Status))
805 return_ACPI_STATUS (Status);
810 *ReturnNode = ThisNode;
811 return_ACPI_STATUS (AE_OK);