1 /******************************************************************************
3 * Module Name: dswload - Dispatcher namespace load callbacks
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/compiler/aslcompiler.h>
153 #include <contrib/dev/acpica/include/amlcode.h>
154 #include <contrib/dev/acpica/include/acdispat.h>
155 #include <contrib/dev/acpica/include/acnamesp.h>
157 #include "aslcompiler.y.h"
159 #define _COMPONENT ACPI_COMPILER
160 ACPI_MODULE_NAME ("aslload")
162 /* Local prototypes */
165 LdLoadFieldElements (
166 ACPI_PARSE_OBJECT *Op,
167 ACPI_WALK_STATE *WalkState);
170 LdLoadResourceElements (
171 ACPI_PARSE_OBJECT *Op,
172 ACPI_WALK_STATE *WalkState);
176 ACPI_PARSE_OBJECT *Op,
182 ACPI_PARSE_OBJECT *Op,
187 LdCommonNamespaceEnd (
188 ACPI_PARSE_OBJECT *Op,
193 /*******************************************************************************
195 * FUNCTION: LdLoadNamespace
197 * PARAMETERS: RootOp - Root of the parse tree
201 * DESCRIPTION: Perform a walk of the parse tree that in turn loads all of the
202 * named ASL/AML objects into the namespace. The namespace is
203 * constructed in order to resolve named references and references
204 * to named fields within resource templates/descriptors.
206 ******************************************************************************/
210 ACPI_PARSE_OBJECT *RootOp)
212 ACPI_WALK_STATE *WalkState;
215 /* Create a new walk state */
217 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
220 return (AE_NO_MEMORY);
223 /* Walk the entire parse tree, first pass */
225 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace1Begin,
226 LdCommonNamespaceEnd, WalkState);
228 /* Second pass to handle forward references */
230 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace2Begin,
231 LdCommonNamespaceEnd, WalkState);
233 /* Dump the namespace if debug is enabled */
235 AcpiNsDumpTables (ACPI_NS_ALL, ACPI_UINT32_MAX);
236 ACPI_FREE (WalkState);
241 /*******************************************************************************
243 * FUNCTION: LdLoadFieldElements
245 * PARAMETERS: Op - Parent node (Field)
246 * WalkState - Current walk state
250 * DESCRIPTION: Enter the named elements of the field (children of the parent)
251 * into the namespace.
253 ******************************************************************************/
256 LdLoadFieldElements (
257 ACPI_PARSE_OBJECT *Op,
258 ACPI_WALK_STATE *WalkState)
260 ACPI_PARSE_OBJECT *Child = NULL;
261 ACPI_NAMESPACE_NODE *Node;
265 /* Get the first named field element */
267 switch (Op->Asl.AmlOpcode)
269 case AML_BANK_FIELD_OP:
271 Child = UtGetArg (Op, 6);
274 case AML_INDEX_FIELD_OP:
276 Child = UtGetArg (Op, 5);
281 Child = UtGetArg (Op, 4);
286 /* No other opcodes should arrive here */
288 return (AE_BAD_PARAMETER);
291 /* Enter all elements into the namespace */
295 switch (Child->Asl.AmlOpcode)
297 case AML_INT_RESERVEDFIELD_OP:
298 case AML_INT_ACCESSFIELD_OP:
299 case AML_INT_CONNECTION_OP:
304 Status = AcpiNsLookup (WalkState->ScopeInfo,
305 Child->Asl.Value.String,
306 ACPI_TYPE_LOCAL_REGION_FIELD,
307 ACPI_IMODE_LOAD_PASS1,
308 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
309 ACPI_NS_ERROR_IF_FOUND, NULL, &Node);
310 if (ACPI_FAILURE (Status))
312 if (Status != AE_ALREADY_EXISTS)
314 AslError (ASL_ERROR, ASL_MSG_CORE_EXCEPTION, Child,
315 Child->Asl.Value.String);
318 else if (Status == AE_ALREADY_EXISTS &&
319 (Node->Flags & ANOBJ_IS_EXTERNAL) &&
320 Node->OwnerId != WalkState->OwnerId)
322 Node->Type = (UINT8) ACPI_TYPE_LOCAL_REGION_FIELD;
327 * The name already exists in this scope
328 * But continue processing the elements
330 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Child,
331 Child->Asl.Value.String, ASL_MSG_FOUND_HERE, Node->Op,
332 Node->Op->Asl.ExternalName);
337 Child->Asl.Node = Node;
343 Child = Child->Asl.Next;
350 /*******************************************************************************
352 * FUNCTION: LdLoadResourceElements
354 * PARAMETERS: Op - Parent node (Resource Descriptor)
355 * WalkState - Current walk state
359 * DESCRIPTION: Enter the named elements of the resource descriptor (children
360 * of the parent) into the namespace.
362 * NOTE: In the real AML namespace, these named elements never exist. But
363 * we simply use the namespace here as a symbol table so we can look
364 * them up as they are referenced.
366 ******************************************************************************/
369 LdLoadResourceElements (
370 ACPI_PARSE_OBJECT *Op,
371 ACPI_WALK_STATE *WalkState)
373 ACPI_PARSE_OBJECT *InitializerOp = NULL;
374 ACPI_NAMESPACE_NODE *Node;
379 * Enter the resource name into the namespace. Name must not already exist.
380 * This opens a scope, so later field names are guaranteed to be new/unique.
382 Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Asl.Namepath,
383 ACPI_TYPE_LOCAL_RESOURCE, ACPI_IMODE_LOAD_PASS1,
384 ACPI_NS_NO_UPSEARCH | ACPI_NS_ERROR_IF_FOUND,
386 if (ACPI_FAILURE (Status))
388 if (Status == AE_ALREADY_EXISTS)
390 /* Actual node causing the error was saved in ParentMethod */
392 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS,
393 (ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod,
394 Op->Asl.Namepath, ASL_MSG_FOUND_HERE, Node->Op,
395 Node->Op->Asl.ExternalName);
401 Node->Value = (UINT32) Op->Asl.Value.Integer;
406 * Now enter the predefined fields, for easy lookup when referenced
409 InitializerOp = ASL_GET_CHILD_NODE (Op);
410 while (InitializerOp)
412 if (InitializerOp->Asl.ExternalName)
414 Status = AcpiNsLookup (WalkState->ScopeInfo,
415 InitializerOp->Asl.ExternalName,
416 ACPI_TYPE_LOCAL_RESOURCE_FIELD,
417 ACPI_IMODE_LOAD_PASS1,
418 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE,
420 if (ACPI_FAILURE (Status))
426 * Store the field offset and length in the namespace node
427 * so it can be used when the field is referenced
429 Node->Value = InitializerOp->Asl.Value.Tag.BitOffset;
430 Node->Length = InitializerOp->Asl.Value.Tag.BitLength;
431 InitializerOp->Asl.Node = Node;
432 Node->Op = InitializerOp;
435 InitializerOp = ASL_GET_PEER_NODE (InitializerOp);
442 /*******************************************************************************
444 * FUNCTION: LdNamespace1Begin
446 * PARAMETERS: ASL_WALK_CALLBACK
450 * DESCRIPTION: Descending callback used during the parse tree walk. If this
451 * is a named AML opcode, enter into the namespace
453 ******************************************************************************/
457 ACPI_PARSE_OBJECT *Op,
461 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
462 ACPI_NAMESPACE_NODE *Node;
463 ACPI_PARSE_OBJECT *MethodOp;
465 ACPI_OBJECT_TYPE ObjectType;
466 ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY;
468 UINT32 Flags = ACPI_NS_NO_UPSEARCH;
469 ACPI_PARSE_OBJECT *Arg;
471 BOOLEAN ForceNewScope = FALSE;
472 ACPI_OWNER_ID OwnerId = 0;
475 ACPI_FUNCTION_NAME (LdNamespace1Begin);
476 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
477 Op, Op->Asl.ParseOpName));
479 if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK)
482 * Allocate an OwnerId for this block. This helps identify the owners
483 * of each namespace node. This is used in determining whether if
484 * certain external declarations cause redefinition errors.
486 Status = AcpiUtAllocateOwnerId (&OwnerId);
487 WalkState->OwnerId = OwnerId;
488 if (ACPI_FAILURE (Status))
490 AslCoreSubsystemError (Op, Status,
491 "Failure to allocate owner ID to this definition block.", FALSE);
492 return_ACPI_STATUS (Status);
497 * We are only interested in opcodes that have an associated name
498 * (or multiple names)
500 switch (Op->Asl.AmlOpcode)
502 case AML_BANK_FIELD_OP:
503 case AML_INDEX_FIELD_OP:
506 Status = LdLoadFieldElements (Op, WalkState);
509 case AML_INT_CONNECTION_OP:
512 if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP)
518 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName,
519 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
521 if (ACPI_FAILURE (Status))
526 if (Node->Type == ACPI_TYPE_BUFFER)
528 Arg->Asl.Node = Node;
530 Arg = Node->Op->Asl.Child; /* Get namepath */
531 Arg = Arg->Asl.Next; /* Get actual buffer */
532 Arg = Arg->Asl.Child; /* Buffer length */
533 Arg = Arg->Asl.Next; /* RAW_DATA buffer */
539 /* All other opcodes go below */
544 /* Check if this object has already been installed in the namespace */
551 Path = Op->Asl.Namepath;
557 /* Map the raw opcode into an internal object type */
559 switch (Op->Asl.ParseOpcode)
563 Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */
564 Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */
567 * If this name refers to a ResourceTemplate, we will need to open
568 * a new scope so that the resource subfield names can be entered into
569 * the namespace underneath this name
571 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC)
573 ForceNewScope = TRUE;
576 /* Get the data type associated with the named object, not the name itself */
578 /* Log2 loop to convert from Btype (binary) to Etype (encoded) */
581 for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2)
588 case PARSEOP_EXTERNAL:
590 * "External" simply enters a name and type into the namespace.
591 * We must be careful to not open a new scope, however, no matter
592 * what type the external name refers to (e.g., a method)
594 * first child is name, next child is ObjectType
596 ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer;
597 ObjectType = ACPI_TYPE_ANY;
600 * We will mark every new node along the path as "External". This
601 * allows some or all of the nodes to be created later in the ASL
602 * code. Handles cases like this:
604 * External (\_SB_.PCI0.ABCD, IntObj)
613 * Store (\_SB_.PCI0.ABCD, Local0)
616 Flags |= ACPI_NS_EXTERNAL;
619 case PARSEOP_DEFAULT_ARG:
621 if (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)
623 Status = LdLoadResourceElements (Op, WalkState);
624 return_ACPI_STATUS (Status);
627 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
632 * The name referenced by Scope(Name) must already exist at this point.
633 * In other words, forward references for Scope() are not supported.
634 * The only real reason for this is that the MS interpreter cannot
635 * handle this case. Perhaps someday this case can go away.
637 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
638 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
640 if (ACPI_FAILURE (Status))
642 if (Status == AE_NOT_FOUND)
644 /* The name was not found, go ahead and create it */
646 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
647 ACPI_TYPE_LOCAL_SCOPE,
648 ACPI_IMODE_LOAD_PASS1, Flags,
650 if (ACPI_FAILURE (Status))
652 return_ACPI_STATUS (Status);
656 * However, this is an error -- primarily because the MS
657 * interpreter can't handle a forward reference from the
660 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
661 Op->Asl.ExternalName);
662 AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op,
663 Op->Asl.ExternalName);
667 AslCoreSubsystemError (Op, Status,
668 "Failure from namespace lookup", FALSE);
670 return_ACPI_STATUS (Status);
672 else /* Status AE_OK */
675 * Do not allow references to external scopes from the DSDT.
676 * This is because the DSDT is always loaded first, and the
677 * external reference cannot be resolved -- causing a runtime
678 * error because Scope() must be resolved immediately.
681 if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
682 (ACPI_COMPARE_NAME (Gbl_TableSignature, "DSDT")))
684 /* However, allowed if the reference is within a method */
686 MethodOp = Op->Asl.Parent;
688 (MethodOp->Asl.ParseOpcode != PARSEOP_METHOD))
690 MethodOp = MethodOp->Asl.Parent;
695 /* Not in a control method, error */
697 AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL);
702 /* We found a node with this name, now check the type */
706 case ACPI_TYPE_LOCAL_SCOPE:
707 case ACPI_TYPE_DEVICE:
708 case ACPI_TYPE_POWER:
709 case ACPI_TYPE_PROCESSOR:
710 case ACPI_TYPE_THERMAL:
712 /* These are acceptable types - they all open a new scope */
715 case ACPI_TYPE_INTEGER:
716 case ACPI_TYPE_STRING:
717 case ACPI_TYPE_BUFFER:
719 * These types we will allow, but we will change the type.
720 * This enables some existing code of the form:
723 * Scope (DEB) { ... }
725 * Which is used to workaround the fact that the MS interpreter
726 * does not allow Scope() forward references.
728 sprintf (MsgBuffer, "%s [%s], changing type to [Scope]",
729 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
730 AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
732 /* Switch the type to scope, open the new scope */
734 Node->Type = ACPI_TYPE_LOCAL_SCOPE;
735 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
737 if (ACPI_FAILURE (Status))
739 return_ACPI_STATUS (Status);
745 /* All other types are an error */
747 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
748 AcpiUtGetTypeName (Node->Type));
749 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
752 * However, switch the type to be an actual scope so
753 * that compilation can continue without generating a whole
754 * cascade of additional errors. Open the new scope.
756 Node->Type = ACPI_TYPE_LOCAL_SCOPE;
757 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
759 if (ACPI_FAILURE (Status))
761 return_ACPI_STATUS (Status);
772 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
777 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n",
778 Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType)));
780 /* The name must not already exist */
782 Flags |= ACPI_NS_ERROR_IF_FOUND;
785 * Enter the named type into the internal namespace. We enter the name
786 * as we go downward in the parse tree. Any necessary subobjects that
787 * involve arguments to the opcode must be created as we go back up the
790 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
791 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
792 if (ACPI_FAILURE (Status))
794 if (Status == AE_ALREADY_EXISTS)
796 /* The name already exists in this scope */
798 if (Node->Type == ACPI_TYPE_LOCAL_SCOPE)
800 /* Allow multiple references to the same scope */
802 Node->Type = (UINT8) ObjectType;
805 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
806 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
809 * Allow one create on an object or segment that was
810 * previously declared External only if WalkState->OwnerId and
811 * Node->OwnerId are different (meaning that the current WalkState
812 * and the Node are in different tables).
814 Node->Flags &= ~ANOBJ_IS_EXTERNAL;
815 Node->Type = (UINT8) ObjectType;
817 /* Just retyped a node, probably will need to open a scope */
819 if (AcpiNsOpensScope (ObjectType))
821 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
822 if (ACPI_FAILURE (Status))
824 return_ACPI_STATUS (Status);
830 if (Node->OwnerId == WalkState->OwnerId &&
831 !(Node->Flags & IMPLICIT_EXTERNAL))
833 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
834 Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
835 Node->Op->Asl.ExternalName);
837 if (Node->Flags & IMPLICIT_EXTERNAL)
839 Node->Flags &= ~IMPLICIT_EXTERNAL;
842 else if (!(Node->Flags & ANOBJ_IS_EXTERNAL) &&
843 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
846 * Allow externals in same scope as the definition of the
847 * actual object. Similar to C. Allows multiple definition
848 * blocks that refer to each other in the same file. However,
849 * do not allow name declaration and an external declaration
850 * within the same table. This is considered a re-declaration.
854 if (Node->OwnerId == WalkState->OwnerId)
856 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
857 Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
858 Node->Op->Asl.ExternalName);
861 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
862 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) &&
863 (ObjectType == ACPI_TYPE_ANY))
866 * Allow update of externals of unknown type.
867 * In the case that multiple definition blocks are being
868 * parsed, updating the OwnerId allows enables subsequent calls
869 * of this method to understand which table the most recent
870 * external declaration was seen. Without this OwnerId update,
871 * code like the following is allowed to compile:
873 * DefinitionBlock("externtest.aml", "DSDT", 0x02, "Intel", "Many", 0x00000001)
875 * External(ERRS,methodobj)
883 * DefinitionBlock("externtest.aml", "SSDT", 0x02, "Intel", "Many", 0x00000001)
887 * External(ERRS,methodobj)
894 Node->OwnerId = WalkState->OwnerId;
896 if (AcpiNsOpensScope (ActualObjectType))
898 Node->Type = (UINT8) ActualObjectType;
903 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
904 AcpiUtGetTypeName (Node->Type));
905 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
906 return_ACPI_STATUS (AE_OK);
911 /* Valid error, object already exists */
913 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
914 Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op,
915 Node->Op->Asl.ExternalName);
916 return_ACPI_STATUS (AE_OK);
921 AslCoreSubsystemError (Op, Status,
922 "Failure from namespace lookup", FALSE);
923 return_ACPI_STATUS (Status);
929 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
930 if (ACPI_FAILURE (Status))
932 return_ACPI_STATUS (Status);
938 * Point the parse node to the new namespace node, and point
939 * the Node back to the original Parse node
944 /* Set the actual data type if appropriate (EXTERNAL term only) */
946 if (ActualObjectType != ACPI_TYPE_ANY)
948 Node->Type = (UINT8) ActualObjectType;
949 Node->Value = ASL_EXTERNAL_METHOD;
952 if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
955 * Get the method argument count from "Extra" and save
956 * it in the namespace node
958 Node->Value = (UINT32) Op->Asl.Extra;
961 return_ACPI_STATUS (Status);
965 /*******************************************************************************
967 * FUNCTION: LdNamespace2Begin
969 * PARAMETERS: ASL_WALK_CALLBACK
973 * DESCRIPTION: Descending callback used during the pass 2 parse tree walk.
974 * Second pass resolves some forward references.
977 * Currently only needs to handle the Alias operator.
978 * Could be used to allow forward references from the Scope() operator, but
979 * the MS interpreter does not allow this, so this compiler does not either.
981 ******************************************************************************/
985 ACPI_PARSE_OBJECT *Op,
989 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
991 ACPI_NAMESPACE_NODE *Node;
992 ACPI_OBJECT_TYPE ObjectType;
993 BOOLEAN ForceNewScope = FALSE;
994 ACPI_PARSE_OBJECT *Arg;
996 ACPI_NAMESPACE_NODE *TargetNode;
999 ACPI_FUNCTION_NAME (LdNamespace2Begin);
1000 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
1001 Op, Op->Asl.ParseOpName));
1004 /* Ignore Ops with no namespace node */
1006 Node = Op->Asl.Node;
1012 /* Get the type to determine if we should push the scope */
1014 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
1015 (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC))
1017 ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
1021 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
1024 /* Push scope for Resource Templates */
1026 if (Op->Asl.ParseOpcode == PARSEOP_NAME)
1028 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC)
1030 ForceNewScope = TRUE;
1034 /* Push the scope stack */
1036 if (ForceNewScope || AcpiNsOpensScope (ObjectType))
1038 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
1039 if (ACPI_FAILURE (Status))
1041 return_ACPI_STATUS (Status);
1045 if (Op->Asl.ParseOpcode == PARSEOP_ALIAS)
1047 /* Complete the alias node by getting and saving the target node */
1049 /* First child is the alias target */
1051 Arg = Op->Asl.Child;
1053 /* Get the target pathname */
1055 Path = Arg->Asl.Namepath;
1058 Status = UtInternalizeName (Arg->Asl.ExternalName, &Path);
1059 if (ACPI_FAILURE (Status))
1065 /* Get the NS node associated with the target. It must exist. */
1067 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
1068 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
1069 WalkState, &TargetNode);
1070 if (ACPI_FAILURE (Status))
1072 if (Status == AE_NOT_FOUND)
1074 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
1075 Op->Asl.ExternalName);
1078 * The name was not found, go ahead and create it.
1079 * This prevents more errors later.
1081 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
1083 ACPI_IMODE_LOAD_PASS1, ACPI_NS_NO_UPSEARCH,
1084 WalkState, &(Node));
1088 AslCoreSubsystemError (Op, Status,
1089 "Failure from namespace lookup", FALSE);
1093 /* Save the target node within the alias node */
1095 Node->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
1102 /*******************************************************************************
1104 * FUNCTION: LdCommonNamespaceEnd
1106 * PARAMETERS: ASL_WALK_CALLBACK
1110 * DESCRIPTION: Ascending callback used during the loading of the namespace,
1111 * We only need to worry about managing the scope stack here.
1113 ******************************************************************************/
1116 LdCommonNamespaceEnd (
1117 ACPI_PARSE_OBJECT *Op,
1121 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
1122 ACPI_OBJECT_TYPE ObjectType;
1123 BOOLEAN ForceNewScope = FALSE;
1126 ACPI_FUNCTION_NAME (LdCommonNamespaceEnd);
1129 /* We are only interested in opcodes that have an associated name */
1131 if (!Op->Asl.Namepath)
1136 /* Get the type to determine if we should pop the scope */
1138 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
1139 (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC))
1141 /* TBD: Merge into AcpiDsMapNamedOpcodeToDataType */
1143 ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
1147 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
1150 /* Pop scope that was pushed for Resource Templates */
1152 if (Op->Asl.ParseOpcode == PARSEOP_NAME)
1154 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC)
1156 ForceNewScope = TRUE;
1160 /* Pop the scope stack */
1162 if (ForceNewScope || AcpiNsOpensScope (ObjectType))
1164 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
1165 "(%s): Popping scope for Op [%s] %p\n",
1166 AcpiUtGetTypeName (ObjectType), Op->Asl.ParseOpName, Op));
1168 (void) AcpiDsScopeStackPop (WalkState);