1 /******************************************************************************
3 * Module Name: dswload - Dispatcher namespace load callbacks
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2010, 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 #define __ASLLOAD_C__
118 #include <contrib/dev/acpica/compiler/aslcompiler.h>
119 #include <contrib/dev/acpica/include/amlcode.h>
120 #include <contrib/dev/acpica/include/acdispat.h>
121 #include <contrib/dev/acpica/include/acnamesp.h>
123 #include "aslcompiler.y.h"
125 #define _COMPONENT ACPI_COMPILER
126 ACPI_MODULE_NAME ("aslload")
128 /* Local prototypes */
131 LdLoadFieldElements (
132 ACPI_PARSE_OBJECT *Op,
133 ACPI_WALK_STATE *WalkState);
136 LdLoadResourceElements (
137 ACPI_PARSE_OBJECT *Op,
138 ACPI_WALK_STATE *WalkState);
142 ACPI_PARSE_OBJECT *Op,
148 ACPI_PARSE_OBJECT *Op,
153 LdCommonNamespaceEnd (
154 ACPI_PARSE_OBJECT *Op,
159 /*******************************************************************************
161 * FUNCTION: LdLoadNamespace
163 * PARAMETERS: RootOp - Root of the parse tree
167 * DESCRIPTION: Perform a walk of the parse tree that in turn loads all of the
168 * named ASL/AML objects into the namespace. The namespace is
169 * constructed in order to resolve named references and references
170 * to named fields within resource templates/descriptors.
172 ******************************************************************************/
176 ACPI_PARSE_OBJECT *RootOp)
178 ACPI_WALK_STATE *WalkState;
181 DbgPrint (ASL_DEBUG_OUTPUT, "\nCreating namespace\n\n");
183 /* Create a new walk state */
185 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
191 /* Walk the entire parse tree, first pass */
193 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace1Begin,
194 LdCommonNamespaceEnd, WalkState);
196 /* Second pass to handle forward references */
198 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace2Begin,
199 LdCommonNamespaceEnd, WalkState);
201 /* Dump the namespace if debug is enabled */
203 AcpiNsDumpTables (ACPI_NS_ALL, ACPI_UINT32_MAX);
208 /*******************************************************************************
210 * FUNCTION: LdLoadFieldElements
212 * PARAMETERS: Op - Parent node (Field)
213 * WalkState - Current walk state
217 * DESCRIPTION: Enter the named elements of the field (children of the parent)
218 * into the namespace.
220 ******************************************************************************/
223 LdLoadFieldElements (
224 ACPI_PARSE_OBJECT *Op,
225 ACPI_WALK_STATE *WalkState)
227 ACPI_PARSE_OBJECT *Child = NULL;
228 ACPI_NAMESPACE_NODE *Node;
232 /* Get the first named field element */
234 switch (Op->Asl.AmlOpcode)
236 case AML_BANK_FIELD_OP:
238 Child = UtGetArg (Op, 6);
241 case AML_INDEX_FIELD_OP:
243 Child = UtGetArg (Op, 5);
248 Child = UtGetArg (Op, 4);
252 /* No other opcodes should arrive here */
253 return (AE_BAD_PARAMETER);
256 /* Enter all elements into the namespace */
260 switch (Child->Asl.AmlOpcode)
262 case AML_INT_RESERVEDFIELD_OP:
263 case AML_INT_ACCESSFIELD_OP:
269 Status = AcpiNsLookup (WalkState->ScopeInfo,
270 Child->Asl.Value.String,
271 ACPI_TYPE_LOCAL_REGION_FIELD,
272 ACPI_IMODE_LOAD_PASS1,
273 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
274 ACPI_NS_ERROR_IF_FOUND,
276 if (ACPI_FAILURE (Status))
278 if (Status != AE_ALREADY_EXISTS)
280 AslError (ASL_ERROR, ASL_MSG_CORE_EXCEPTION, Child,
281 Child->Asl.Value.String);
286 * The name already exists in this scope
287 * But continue processing the elements
289 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Child,
290 Child->Asl.Value.String);
294 Child->Asl.Node = Node;
299 Child = Child->Asl.Next;
305 /*******************************************************************************
307 * FUNCTION: LdLoadResourceElements
309 * PARAMETERS: Op - Parent node (Resource Descriptor)
310 * WalkState - Current walk state
314 * DESCRIPTION: Enter the named elements of the resource descriptor (children
315 * of the parent) into the namespace.
317 * NOTE: In the real AML namespace, these named elements never exist. But
318 * we simply use the namespace here as a symbol table so we can look
319 * them up as they are referenced.
321 ******************************************************************************/
324 LdLoadResourceElements (
325 ACPI_PARSE_OBJECT *Op,
326 ACPI_WALK_STATE *WalkState)
328 ACPI_PARSE_OBJECT *InitializerOp = NULL;
329 ACPI_NAMESPACE_NODE *Node;
334 * Enter the resource name into the namespace. Name must not already exist.
335 * This opens a scope, so later field names are guaranteed to be new/unique.
337 Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Asl.Namepath,
338 ACPI_TYPE_LOCAL_RESOURCE, ACPI_IMODE_LOAD_PASS1,
339 ACPI_NS_NO_UPSEARCH | ACPI_NS_ERROR_IF_FOUND,
341 if (ACPI_FAILURE (Status))
343 if (Status == AE_ALREADY_EXISTS)
345 /* Actual node causing the error was saved in ParentMethod */
347 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS,
348 (ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod, Op->Asl.Namepath);
354 Node->Value = (UINT32) Op->Asl.Value.Integer;
359 * Now enter the predefined fields, for easy lookup when referenced
362 InitializerOp = ASL_GET_CHILD_NODE (Op);
363 while (InitializerOp)
366 if (InitializerOp->Asl.ExternalName)
368 Status = AcpiNsLookup (WalkState->ScopeInfo,
369 InitializerOp->Asl.ExternalName,
370 ACPI_TYPE_LOCAL_RESOURCE_FIELD,
371 ACPI_IMODE_LOAD_PASS1,
372 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE,
374 if (ACPI_FAILURE (Status))
380 * Store the field offset in the namespace node so it
381 * can be used when the field is referenced
383 Node->Value = (UINT32) InitializerOp->Asl.Value.Integer;
384 InitializerOp->Asl.Node = Node;
385 Node->Op = InitializerOp;
387 /* Pass thru the field type (Bitfield or Bytefield) */
389 if (InitializerOp->Asl.CompileFlags & NODE_IS_BIT_OFFSET)
391 Node->Flags |= ANOBJ_IS_BIT_OFFSET;
394 InitializerOp = ASL_GET_PEER_NODE (InitializerOp);
401 /*******************************************************************************
403 * FUNCTION: LdNamespace1Begin
405 * PARAMETERS: ASL_WALK_CALLBACK
409 * DESCRIPTION: Descending callback used during the parse tree walk. If this
410 * is a named AML opcode, enter into the namespace
412 ******************************************************************************/
416 ACPI_PARSE_OBJECT *Op,
420 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
421 ACPI_NAMESPACE_NODE *Node;
423 ACPI_OBJECT_TYPE ObjectType;
424 ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY;
426 UINT32 Flags = ACPI_NS_NO_UPSEARCH;
427 ACPI_PARSE_OBJECT *Arg;
429 BOOLEAN ForceNewScope = FALSE;
432 ACPI_FUNCTION_NAME (LdNamespace1Begin);
433 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
434 Op, Op->Asl.ParseOpName));
438 * We are only interested in opcodes that have an associated name
439 * (or multiple names)
441 switch (Op->Asl.AmlOpcode)
443 case AML_BANK_FIELD_OP:
444 case AML_INDEX_FIELD_OP:
447 Status = LdLoadFieldElements (Op, WalkState);
452 /* All other opcodes go below */
456 /* Check if this object has already been installed in the namespace */
463 Path = Op->Asl.Namepath;
469 /* Map the raw opcode into an internal object type */
471 switch (Op->Asl.ParseOpcode)
475 Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */
476 Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */
479 * If this name refers to a ResourceTemplate, we will need to open
480 * a new scope so that the resource subfield names can be entered into
481 * the namespace underneath this name
483 if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
485 ForceNewScope = TRUE;
488 /* Get the data type associated with the named object, not the name itself */
490 /* Log2 loop to convert from Btype (binary) to Etype (encoded) */
493 for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2)
500 case PARSEOP_EXTERNAL:
503 * "External" simply enters a name and type into the namespace.
504 * We must be careful to not open a new scope, however, no matter
505 * what type the external name refers to (e.g., a method)
507 * first child is name, next child is ObjectType
509 ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer;
510 ObjectType = ACPI_TYPE_ANY;
513 * We will mark every new node along the path as "External". This
514 * allows some or all of the nodes to be created later in the ASL
515 * code. Handles cases like this:
517 * External (\_SB_.PCI0.ABCD, IntObj)
526 * Store (\_SB_.PCI0.ABCD, Local0)
529 Flags |= ACPI_NS_EXTERNAL;
532 case PARSEOP_DEFAULT_ARG:
534 if (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC)
536 Status = LdLoadResourceElements (Op, WalkState);
537 return_ACPI_STATUS (Status);
540 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
547 * The name referenced by Scope(Name) must already exist at this point.
548 * In other words, forward references for Scope() are not supported.
549 * The only real reason for this is that the MS interpreter cannot
550 * handle this case. Perhaps someday this case can go away.
552 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
553 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
555 if (ACPI_FAILURE (Status))
557 if (Status == AE_NOT_FOUND)
559 /* The name was not found, go ahead and create it */
561 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
562 ACPI_TYPE_LOCAL_SCOPE,
563 ACPI_IMODE_LOAD_PASS1, Flags,
567 * However, this is an error -- primarily because the MS
568 * interpreter can't handle a forward reference from the
571 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
572 Op->Asl.ExternalName);
573 AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op,
574 Op->Asl.ExternalName);
578 AslCoreSubsystemError (Op, Status,
579 "Failure from namespace lookup", FALSE);
581 return_ACPI_STATUS (Status);
584 /* We found a node with this name, now check the type */
588 case ACPI_TYPE_LOCAL_SCOPE:
589 case ACPI_TYPE_DEVICE:
590 case ACPI_TYPE_POWER:
591 case ACPI_TYPE_PROCESSOR:
592 case ACPI_TYPE_THERMAL:
594 /* These are acceptable types - they all open a new scope */
597 case ACPI_TYPE_INTEGER:
598 case ACPI_TYPE_STRING:
599 case ACPI_TYPE_BUFFER:
602 * These types we will allow, but we will change the type.
603 * This enables some existing code of the form:
606 * Scope (DEB) { ... }
608 * Which is used to workaround the fact that the MS interpreter
609 * does not allow Scope() forward references.
611 sprintf (MsgBuffer, "%s [%s], changing type to [Scope]",
612 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
613 AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
615 /* Switch the type to scope, open the new scope */
617 Node->Type = ACPI_TYPE_LOCAL_SCOPE;
618 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
620 if (ACPI_FAILURE (Status))
622 return_ACPI_STATUS (Status);
628 /* All other types are an error */
630 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
631 AcpiUtGetTypeName (Node->Type));
632 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
635 * However, switch the type to be an actual scope so
636 * that compilation can continue without generating a whole
637 * cascade of additional errors. Open the new scope.
639 Node->Type = ACPI_TYPE_LOCAL_SCOPE;
640 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
642 if (ACPI_FAILURE (Status))
644 return_ACPI_STATUS (Status);
655 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
660 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n",
661 Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType)));
663 /* The name must not already exist */
665 Flags |= ACPI_NS_ERROR_IF_FOUND;
668 * Enter the named type into the internal namespace. We enter the name
669 * as we go downward in the parse tree. Any necessary subobjects that
670 * involve arguments to the opcode must be created as we go back up the
673 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
674 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
675 if (ACPI_FAILURE (Status))
677 if (Status == AE_ALREADY_EXISTS)
679 /* The name already exists in this scope */
681 if (Node->Type == ACPI_TYPE_LOCAL_SCOPE)
683 /* Allow multiple references to the same scope */
685 Node->Type = (UINT8) ObjectType;
688 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
689 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
692 * Allow one create on an object or segment that was
693 * previously declared External
695 Node->Flags &= ~ANOBJ_IS_EXTERNAL;
696 Node->Type = (UINT8) ObjectType;
698 /* Just retyped a node, probably will need to open a scope */
700 if (AcpiNsOpensScope (ObjectType))
702 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
703 if (ACPI_FAILURE (Status))
705 return_ACPI_STATUS (Status);
712 /* Valid error, object already exists */
714 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
715 Op->Asl.ExternalName);
716 return_ACPI_STATUS (AE_OK);
721 AslCoreSubsystemError (Op, Status,
722 "Failure from namespace lookup", FALSE);
723 return_ACPI_STATUS (Status);
729 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
730 if (ACPI_FAILURE (Status))
732 return_ACPI_STATUS (Status);
738 * Point the parse node to the new namespace node, and point
739 * the Node back to the original Parse node
744 /* Set the actual data type if appropriate (EXTERNAL term only) */
746 if (ActualObjectType != ACPI_TYPE_ANY)
748 Node->Type = (UINT8) ActualObjectType;
749 Node->Value = ASL_EXTERNAL_METHOD;
752 if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
755 * Get the method argument count from "Extra" and save
756 * it in the namespace node
758 Node->Value = (UINT32) Op->Asl.Extra;
761 return_ACPI_STATUS (Status);
765 /*******************************************************************************
767 * FUNCTION: LdNamespace2Begin
769 * PARAMETERS: ASL_WALK_CALLBACK
773 * DESCRIPTION: Descending callback used during the pass 2 parse tree walk.
774 * Second pass resolves some forward references.
777 * Currently only needs to handle the Alias operator.
778 * Could be used to allow forward references from the Scope() operator, but
779 * the MS interpreter does not allow this, so this compiler does not either.
781 ******************************************************************************/
785 ACPI_PARSE_OBJECT *Op,
789 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
791 ACPI_NAMESPACE_NODE *Node;
792 ACPI_OBJECT_TYPE ObjectType;
793 BOOLEAN ForceNewScope = FALSE;
794 ACPI_PARSE_OBJECT *Arg;
796 ACPI_NAMESPACE_NODE *TargetNode;
799 ACPI_FUNCTION_NAME (LdNamespace2Begin);
800 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
801 Op, Op->Asl.ParseOpName));
804 /* Ignore Ops with no namespace node */
812 /* Get the type to determine if we should push the scope */
814 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
815 (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC))
817 ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
821 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
824 /* Push scope for Resource Templates */
826 if (Op->Asl.ParseOpcode == PARSEOP_NAME)
828 if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
830 ForceNewScope = TRUE;
834 /* Push the scope stack */
836 if (ForceNewScope || AcpiNsOpensScope (ObjectType))
838 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
839 if (ACPI_FAILURE (Status))
841 return_ACPI_STATUS (Status);
845 if (Op->Asl.ParseOpcode == PARSEOP_ALIAS)
847 /* Complete the alias node by getting and saving the target node */
849 /* First child is the alias target */
853 /* Get the target pathname */
855 Path = Arg->Asl.Namepath;
858 Status = UtInternalizeName (Arg->Asl.ExternalName, &Path);
859 if (ACPI_FAILURE (Status))
865 /* Get the NS node associated with the target. It must exist. */
867 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
868 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
869 WalkState, &TargetNode);
870 if (ACPI_FAILURE (Status))
872 if (Status == AE_NOT_FOUND)
874 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
875 Op->Asl.ExternalName);
878 * The name was not found, go ahead and create it.
879 * This prevents more errors later.
881 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
883 ACPI_IMODE_LOAD_PASS1, ACPI_NS_NO_UPSEARCH,
888 AslCoreSubsystemError (Op, Status,
889 "Failure from namespace lookup", FALSE);
893 /* Save the target node within the alias node */
895 Node->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
902 /*******************************************************************************
904 * FUNCTION: LdCommonNamespaceEnd
906 * PARAMETERS: ASL_WALK_CALLBACK
910 * DESCRIPTION: Ascending callback used during the loading of the namespace,
911 * We only need to worry about managing the scope stack here.
913 ******************************************************************************/
916 LdCommonNamespaceEnd (
917 ACPI_PARSE_OBJECT *Op,
921 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
922 ACPI_OBJECT_TYPE ObjectType;
923 BOOLEAN ForceNewScope = FALSE;
926 ACPI_FUNCTION_NAME (LdCommonNamespaceEnd);
929 /* We are only interested in opcodes that have an associated name */
931 if (!Op->Asl.Namepath)
936 /* Get the type to determine if we should pop the scope */
938 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
939 (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC))
941 /* TBD: Merge into AcpiDsMapNamedOpcodeToDataType */
943 ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
947 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
950 /* Pop scope that was pushed for Resource Templates */
952 if (Op->Asl.ParseOpcode == PARSEOP_NAME)
954 if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
956 ForceNewScope = TRUE;
960 /* Pop the scope stack */
962 if (ForceNewScope || AcpiNsOpensScope (ObjectType))
964 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
965 "(%s): Popping scope for Op [%s] %p\n",
966 AcpiUtGetTypeName (ObjectType), Op->Asl.ParseOpName, Op));
968 (void) AcpiDsScopeStackPop (WalkState);