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))
321 Node->Type = (UINT8) ACPI_TYPE_LOCAL_REGION_FIELD;
326 * The name already exists in this scope
327 * But continue processing the elements
329 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Child,
330 Child->Asl.Value.String);
335 Child->Asl.Node = Node;
341 Child = Child->Asl.Next;
348 /*******************************************************************************
350 * FUNCTION: LdLoadResourceElements
352 * PARAMETERS: Op - Parent node (Resource Descriptor)
353 * WalkState - Current walk state
357 * DESCRIPTION: Enter the named elements of the resource descriptor (children
358 * of the parent) into the namespace.
360 * NOTE: In the real AML namespace, these named elements never exist. But
361 * we simply use the namespace here as a symbol table so we can look
362 * them up as they are referenced.
364 ******************************************************************************/
367 LdLoadResourceElements (
368 ACPI_PARSE_OBJECT *Op,
369 ACPI_WALK_STATE *WalkState)
371 ACPI_PARSE_OBJECT *InitializerOp = NULL;
372 ACPI_NAMESPACE_NODE *Node;
377 * Enter the resource name into the namespace. Name must not already exist.
378 * This opens a scope, so later field names are guaranteed to be new/unique.
380 Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Asl.Namepath,
381 ACPI_TYPE_LOCAL_RESOURCE, ACPI_IMODE_LOAD_PASS1,
382 ACPI_NS_NO_UPSEARCH | ACPI_NS_ERROR_IF_FOUND,
384 if (ACPI_FAILURE (Status))
386 if (Status == AE_ALREADY_EXISTS)
388 /* Actual node causing the error was saved in ParentMethod */
390 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS,
391 (ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod, Op->Asl.Namepath);
397 Node->Value = (UINT32) Op->Asl.Value.Integer;
402 * Now enter the predefined fields, for easy lookup when referenced
405 InitializerOp = ASL_GET_CHILD_NODE (Op);
406 while (InitializerOp)
408 if (InitializerOp->Asl.ExternalName)
410 Status = AcpiNsLookup (WalkState->ScopeInfo,
411 InitializerOp->Asl.ExternalName,
412 ACPI_TYPE_LOCAL_RESOURCE_FIELD,
413 ACPI_IMODE_LOAD_PASS1,
414 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE,
416 if (ACPI_FAILURE (Status))
422 * Store the field offset and length in the namespace node
423 * so it can be used when the field is referenced
425 Node->Value = InitializerOp->Asl.Value.Tag.BitOffset;
426 Node->Length = InitializerOp->Asl.Value.Tag.BitLength;
427 InitializerOp->Asl.Node = Node;
428 Node->Op = InitializerOp;
431 InitializerOp = ASL_GET_PEER_NODE (InitializerOp);
438 /*******************************************************************************
440 * FUNCTION: LdNamespace1Begin
442 * PARAMETERS: ASL_WALK_CALLBACK
446 * DESCRIPTION: Descending callback used during the parse tree walk. If this
447 * is a named AML opcode, enter into the namespace
449 ******************************************************************************/
453 ACPI_PARSE_OBJECT *Op,
457 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
458 ACPI_NAMESPACE_NODE *Node;
459 ACPI_PARSE_OBJECT *MethodOp;
461 ACPI_OBJECT_TYPE ObjectType;
462 ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY;
464 UINT32 Flags = ACPI_NS_NO_UPSEARCH;
465 ACPI_PARSE_OBJECT *Arg;
467 BOOLEAN ForceNewScope = FALSE;
468 ACPI_OWNER_ID OwnerId = 0;
471 ACPI_FUNCTION_NAME (LdNamespace1Begin);
472 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
473 Op, Op->Asl.ParseOpName));
475 if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK)
478 * Allocate an OwnerId for this block. This helps identify the owners
479 * of each namespace node. This is used in determining whether if
480 * certain external declarations cause redefinition errors.
482 Status = AcpiUtAllocateOwnerId (&OwnerId);
483 WalkState->OwnerId = OwnerId;
484 if (ACPI_FAILURE (Status))
486 AslCoreSubsystemError (Op, Status,
487 "Failure to allocate owner ID to this definition block.", FALSE);
488 return_ACPI_STATUS (Status);
493 * We are only interested in opcodes that have an associated name
494 * (or multiple names)
496 switch (Op->Asl.AmlOpcode)
498 case AML_BANK_FIELD_OP:
499 case AML_INDEX_FIELD_OP:
502 Status = LdLoadFieldElements (Op, WalkState);
505 case AML_INT_CONNECTION_OP:
508 if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP)
514 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName,
515 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
517 if (ACPI_FAILURE (Status))
522 if (Node->Type == ACPI_TYPE_BUFFER)
524 Arg->Asl.Node = Node;
526 Arg = Node->Op->Asl.Child; /* Get namepath */
527 Arg = Arg->Asl.Next; /* Get actual buffer */
528 Arg = Arg->Asl.Child; /* Buffer length */
529 Arg = Arg->Asl.Next; /* RAW_DATA buffer */
535 /* All other opcodes go below */
540 /* Check if this object has already been installed in the namespace */
547 Path = Op->Asl.Namepath;
553 /* Map the raw opcode into an internal object type */
555 switch (Op->Asl.ParseOpcode)
559 Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */
560 Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */
563 * If this name refers to a ResourceTemplate, we will need to open
564 * a new scope so that the resource subfield names can be entered into
565 * the namespace underneath this name
567 if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
569 ForceNewScope = TRUE;
572 /* Get the data type associated with the named object, not the name itself */
574 /* Log2 loop to convert from Btype (binary) to Etype (encoded) */
577 for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2)
584 case PARSEOP_EXTERNAL:
586 * "External" simply enters a name and type into the namespace.
587 * We must be careful to not open a new scope, however, no matter
588 * what type the external name refers to (e.g., a method)
590 * first child is name, next child is ObjectType
592 ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer;
593 ObjectType = ACPI_TYPE_ANY;
596 * We will mark every new node along the path as "External". This
597 * allows some or all of the nodes to be created later in the ASL
598 * code. Handles cases like this:
600 * External (\_SB_.PCI0.ABCD, IntObj)
609 * Store (\_SB_.PCI0.ABCD, Local0)
612 Flags |= ACPI_NS_EXTERNAL;
615 case PARSEOP_DEFAULT_ARG:
617 if (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC)
619 Status = LdLoadResourceElements (Op, WalkState);
620 return_ACPI_STATUS (Status);
623 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
628 * The name referenced by Scope(Name) must already exist at this point.
629 * In other words, forward references for Scope() are not supported.
630 * The only real reason for this is that the MS interpreter cannot
631 * handle this case. Perhaps someday this case can go away.
633 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
634 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
636 if (ACPI_FAILURE (Status))
638 if (Status == AE_NOT_FOUND)
640 /* The name was not found, go ahead and create it */
642 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
643 ACPI_TYPE_LOCAL_SCOPE,
644 ACPI_IMODE_LOAD_PASS1, Flags,
646 if (ACPI_FAILURE (Status))
648 return_ACPI_STATUS (Status);
652 * However, this is an error -- primarily because the MS
653 * interpreter can't handle a forward reference from the
656 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
657 Op->Asl.ExternalName);
658 AslError (ASL_ERROR, ASL_MSG_SCOPE_FWD_REF, Op,
659 Op->Asl.ExternalName);
663 AslCoreSubsystemError (Op, Status,
664 "Failure from namespace lookup", FALSE);
666 return_ACPI_STATUS (Status);
668 else /* Status AE_OK */
671 * Do not allow references to external scopes from the DSDT.
672 * This is because the DSDT is always loaded first, and the
673 * external reference cannot be resolved -- causing a runtime
674 * error because Scope() must be resolved immediately.
677 if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
678 (ACPI_COMPARE_NAME (Gbl_TableSignature, "DSDT")))
680 /* However, allowed if the reference is within a method */
682 MethodOp = Op->Asl.Parent;
684 (MethodOp->Asl.ParseOpcode != PARSEOP_METHOD))
686 MethodOp = MethodOp->Asl.Parent;
691 /* Not in a control method, error */
693 AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL);
698 /* We found a node with this name, now check the type */
702 case ACPI_TYPE_LOCAL_SCOPE:
703 case ACPI_TYPE_DEVICE:
704 case ACPI_TYPE_POWER:
705 case ACPI_TYPE_PROCESSOR:
706 case ACPI_TYPE_THERMAL:
708 /* These are acceptable types - they all open a new scope */
711 case ACPI_TYPE_INTEGER:
712 case ACPI_TYPE_STRING:
713 case ACPI_TYPE_BUFFER:
715 * These types we will allow, but we will change the type.
716 * This enables some existing code of the form:
719 * Scope (DEB) { ... }
721 * Which is used to workaround the fact that the MS interpreter
722 * does not allow Scope() forward references.
724 sprintf (MsgBuffer, "%s [%s], changing type to [Scope]",
725 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
726 AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
728 /* Switch the type to scope, open the new scope */
730 Node->Type = ACPI_TYPE_LOCAL_SCOPE;
731 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
733 if (ACPI_FAILURE (Status))
735 return_ACPI_STATUS (Status);
741 /* All other types are an error */
743 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
744 AcpiUtGetTypeName (Node->Type));
745 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
748 * However, switch the type to be an actual scope so
749 * that compilation can continue without generating a whole
750 * cascade of additional errors. Open the new scope.
752 Node->Type = ACPI_TYPE_LOCAL_SCOPE;
753 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE,
755 if (ACPI_FAILURE (Status))
757 return_ACPI_STATUS (Status);
768 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
773 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n",
774 Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType)));
776 /* The name must not already exist */
778 Flags |= ACPI_NS_ERROR_IF_FOUND;
781 * Enter the named type into the internal namespace. We enter the name
782 * as we go downward in the parse tree. Any necessary subobjects that
783 * involve arguments to the opcode must be created as we go back up the
786 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
787 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
788 if (ACPI_FAILURE (Status))
790 if (Status == AE_ALREADY_EXISTS)
792 /* The name already exists in this scope */
794 if (Node->Type == ACPI_TYPE_LOCAL_SCOPE)
796 /* Allow multiple references to the same scope */
798 Node->Type = (UINT8) ObjectType;
801 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
802 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
805 * Allow one create on an object or segment that was
806 * previously declared External only if WalkState->OwnerId and
807 * Node->OwnerId are found in different tables (meaning that
808 * they have differnt OwnerIds).
810 Node->Flags &= ~ANOBJ_IS_EXTERNAL;
811 Node->Type = (UINT8) ObjectType;
813 /* Just retyped a node, probably will need to open a scope */
815 if (AcpiNsOpensScope (ObjectType))
817 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
818 if (ACPI_FAILURE (Status))
820 return_ACPI_STATUS (Status);
826 if (Node->OwnerId == WalkState->OwnerId)
828 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
829 Op->Asl.ExternalName);
832 else if (!(Node->Flags & ANOBJ_IS_EXTERNAL) &&
833 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
836 * Allow externals in same scope as the definition of the
837 * actual object. Similar to C. Allows multiple definition
838 * blocks that refer to each other in the same file. However,
839 * do not allow name declaration and an external declaration
840 * within the same table. This is considered a re-declaration.
844 if (Node->OwnerId == WalkState->OwnerId)
846 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
847 Op->Asl.ExternalName);
850 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) &&
851 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) &&
852 (ObjectType == ACPI_TYPE_ANY))
855 * Allow update of externals of unknown type.
856 * In the case that multiple definition blocks are being
857 * parsed, updating the OwnerId allows enables subsequent calls
858 * of this method to understand which table the most recent
859 * external declaration was seen. Without this OwnerId update,
860 * code like the following is allowed to compile:
862 * DefinitionBlock("externtest.aml", "DSDT", 0x02, "Intel", "Many", 0x00000001)
864 * External(ERRS,methodobj)
872 * DefinitionBlock("externtest.aml", "SSDT", 0x02, "Intel", "Many", 0x00000001)
876 * External(ERRS,methodobj)
883 Node->OwnerId = WalkState->OwnerId;
885 if (AcpiNsOpensScope (ActualObjectType))
887 Node->Type = (UINT8) ActualObjectType;
892 sprintf (MsgBuffer, "%s [%s]", Op->Asl.ExternalName,
893 AcpiUtGetTypeName (Node->Type));
894 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, MsgBuffer);
895 return_ACPI_STATUS (AE_OK);
900 /* Valid error, object already exists */
902 AslError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op,
903 Op->Asl.ExternalName);
904 return_ACPI_STATUS (AE_OK);
909 AslCoreSubsystemError (Op, Status,
910 "Failure from namespace lookup", FALSE);
911 return_ACPI_STATUS (Status);
917 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
918 if (ACPI_FAILURE (Status))
920 return_ACPI_STATUS (Status);
926 * Point the parse node to the new namespace node, and point
927 * the Node back to the original Parse node
932 /* Set the actual data type if appropriate (EXTERNAL term only) */
934 if (ActualObjectType != ACPI_TYPE_ANY)
936 Node->Type = (UINT8) ActualObjectType;
937 Node->Value = ASL_EXTERNAL_METHOD;
940 if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
943 * Get the method argument count from "Extra" and save
944 * it in the namespace node
946 Node->Value = (UINT32) Op->Asl.Extra;
949 return_ACPI_STATUS (Status);
953 /*******************************************************************************
955 * FUNCTION: LdNamespace2Begin
957 * PARAMETERS: ASL_WALK_CALLBACK
961 * DESCRIPTION: Descending callback used during the pass 2 parse tree walk.
962 * Second pass resolves some forward references.
965 * Currently only needs to handle the Alias operator.
966 * Could be used to allow forward references from the Scope() operator, but
967 * the MS interpreter does not allow this, so this compiler does not either.
969 ******************************************************************************/
973 ACPI_PARSE_OBJECT *Op,
977 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
979 ACPI_NAMESPACE_NODE *Node;
980 ACPI_OBJECT_TYPE ObjectType;
981 BOOLEAN ForceNewScope = FALSE;
982 ACPI_PARSE_OBJECT *Arg;
984 ACPI_NAMESPACE_NODE *TargetNode;
987 ACPI_FUNCTION_NAME (LdNamespace2Begin);
988 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n",
989 Op, Op->Asl.ParseOpName));
992 /* Ignore Ops with no namespace node */
1000 /* Get the type to determine if we should push the scope */
1002 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
1003 (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC))
1005 ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
1009 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
1012 /* Push scope for Resource Templates */
1014 if (Op->Asl.ParseOpcode == PARSEOP_NAME)
1016 if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
1018 ForceNewScope = TRUE;
1022 /* Push the scope stack */
1024 if (ForceNewScope || AcpiNsOpensScope (ObjectType))
1026 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
1027 if (ACPI_FAILURE (Status))
1029 return_ACPI_STATUS (Status);
1033 if (Op->Asl.ParseOpcode == PARSEOP_ALIAS)
1035 /* Complete the alias node by getting and saving the target node */
1037 /* First child is the alias target */
1039 Arg = Op->Asl.Child;
1041 /* Get the target pathname */
1043 Path = Arg->Asl.Namepath;
1046 Status = UtInternalizeName (Arg->Asl.ExternalName, &Path);
1047 if (ACPI_FAILURE (Status))
1053 /* Get the NS node associated with the target. It must exist. */
1055 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
1056 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
1057 WalkState, &TargetNode);
1058 if (ACPI_FAILURE (Status))
1060 if (Status == AE_NOT_FOUND)
1062 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
1063 Op->Asl.ExternalName);
1066 * The name was not found, go ahead and create it.
1067 * This prevents more errors later.
1069 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
1071 ACPI_IMODE_LOAD_PASS1, ACPI_NS_NO_UPSEARCH,
1072 WalkState, &(Node));
1076 AslCoreSubsystemError (Op, Status,
1077 "Failure from namespace lookup", FALSE);
1081 /* Save the target node within the alias node */
1083 Node->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
1090 /*******************************************************************************
1092 * FUNCTION: LdCommonNamespaceEnd
1094 * PARAMETERS: ASL_WALK_CALLBACK
1098 * DESCRIPTION: Ascending callback used during the loading of the namespace,
1099 * We only need to worry about managing the scope stack here.
1101 ******************************************************************************/
1104 LdCommonNamespaceEnd (
1105 ACPI_PARSE_OBJECT *Op,
1109 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
1110 ACPI_OBJECT_TYPE ObjectType;
1111 BOOLEAN ForceNewScope = FALSE;
1114 ACPI_FUNCTION_NAME (LdCommonNamespaceEnd);
1117 /* We are only interested in opcodes that have an associated name */
1119 if (!Op->Asl.Namepath)
1124 /* Get the type to determine if we should pop the scope */
1126 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) &&
1127 (Op->Asl.CompileFlags == NODE_IS_RESOURCE_DESC))
1129 /* TBD: Merge into AcpiDsMapNamedOpcodeToDataType */
1131 ObjectType = ACPI_TYPE_LOCAL_RESOURCE;
1135 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
1138 /* Pop scope that was pushed for Resource Templates */
1140 if (Op->Asl.ParseOpcode == PARSEOP_NAME)
1142 if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)
1144 ForceNewScope = TRUE;
1148 /* Pop the scope stack */
1150 if (ForceNewScope || AcpiNsOpensScope (ObjectType))
1152 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
1153 "(%s): Popping scope for Op [%s] %p\n",
1154 AcpiUtGetTypeName (ObjectType), Op->Asl.ParseOpName, Op));
1156 (void) AcpiDsScopeStackPop (WalkState);