1 /******************************************************************************
3 * Module Name: aslxref - Namespace cross-reference
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 "aslcompiler.y.h"
154 #include <contrib/dev/acpica/include/acparser.h>
155 #include <contrib/dev/acpica/include/amlcode.h>
156 #include <contrib/dev/acpica/include/acnamesp.h>
157 #include <contrib/dev/acpica/include/acdispat.h>
160 #define _COMPONENT ACPI_COMPILER
161 ACPI_MODULE_NAME ("aslxref")
163 /* Local prototypes */
166 XfNamespaceLocateBegin (
167 ACPI_PARSE_OBJECT *Op,
172 XfNamespaceLocateEnd (
173 ACPI_PARSE_OBJECT *Op,
177 static ACPI_PARSE_OBJECT *
179 ACPI_PARSE_OBJECT *Op);
186 XfCompareOneNamespaceObject (
187 ACPI_HANDLE ObjHandle,
194 ACPI_PARSE_OBJECT *Op,
195 UINT32 RegionBitLength,
196 UINT32 FieldBitOffset,
197 UINT32 FieldBitLength,
198 UINT32 AccessBitWidth);
200 #ifdef __UNDER_DEVELOPMENT
201 static ACPI_PARSE_OBJECT *
203 ACPI_PARSE_OBJECT *Op);
206 XfCheckIllegalReference (
207 ACPI_PARSE_OBJECT *Op,
208 ACPI_NAMESPACE_NODE *Node);
212 ACPI_PARSE_OBJECT *MethodOp1,
213 ACPI_PARSE_OBJECT *MethodOp2);
217 /*******************************************************************************
219 * FUNCTION: XfCrossReferenceNamespace
225 * DESCRIPTION: Perform a cross reference check of the parse tree against the
226 * namespace. Every named referenced within the parse tree
227 * should be get resolved with a namespace lookup. If not, the
228 * original reference in the ASL code is invalid -- i.e., refers
229 * to a non-existent object.
231 * NOTE: The ASL "External" operator causes the name to be inserted into the
232 * namespace so that references to the external name will be resolved
235 ******************************************************************************/
238 XfCrossReferenceNamespace (
241 ACPI_WALK_STATE *WalkState;
245 * Create a new walk state for use when looking up names
246 * within the namespace (Passed as context to the callbacks)
248 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
251 return (AE_NO_MEMORY);
254 /* Walk the entire parse tree */
256 TrWalkParseTree (Gbl_ParseTreeRoot, ASL_WALK_VISIT_TWICE,
257 XfNamespaceLocateBegin, XfNamespaceLocateEnd, WalkState);
259 ACPI_FREE (WalkState);
264 /*******************************************************************************
266 * FUNCTION: XfObjectExists
268 * PARAMETERS: Name - 4 char ACPI name
270 * RETURN: TRUE if name exists in namespace
272 * DESCRIPTION: Walk the namespace to find an object
274 ******************************************************************************/
283 /* Walk entire namespace from the supplied root */
285 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
286 ACPI_UINT32_MAX, FALSE, XfCompareOneNamespaceObject, NULL,
288 if (Status == AE_CTRL_TRUE)
290 /* At least one instance of the name was found */
299 /*******************************************************************************
301 * FUNCTION: XfCompareOneNamespaceObject
303 * PARAMETERS: ACPI_WALK_CALLBACK
307 * DESCRIPTION: Compare name of one object.
309 ******************************************************************************/
312 XfCompareOneNamespaceObject (
313 ACPI_HANDLE ObjHandle,
318 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
321 /* Simply check the name */
323 if (*((UINT32 *) (Context)) == Node->Name.Integer)
325 /* Abort walk if we found one instance */
327 return (AE_CTRL_TRUE);
334 /*******************************************************************************
336 * FUNCTION: XfCheckFieldRange
338 * PARAMETERS: RegionBitLength - Length of entire parent region
339 * FieldBitOffset - Start of the field unit (within region)
340 * FieldBitLength - Entire length of field unit
341 * AccessBitWidth - Access width of the field unit
345 * DESCRIPTION: Check one field unit to make sure it fits in the parent
348 * Note: AccessBitWidth must be either 8,16,32, or 64
350 ******************************************************************************/
354 ACPI_PARSE_OBJECT *Op,
355 UINT32 RegionBitLength,
356 UINT32 FieldBitOffset,
357 UINT32 FieldBitLength,
358 UINT32 AccessBitWidth)
360 UINT32 FieldEndBitOffset;
364 * Check each field unit against the region size. The entire
365 * field unit (start offset plus length) must fit within the
368 FieldEndBitOffset = FieldBitOffset + FieldBitLength;
370 if (FieldEndBitOffset > RegionBitLength)
372 /* Field definition itself is beyond the end-of-region */
374 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL);
379 * Now check that the field plus AccessWidth doesn't go beyond
380 * the end-of-region. Assumes AccessBitWidth is a power of 2
382 FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth);
384 if (FieldEndBitOffset > RegionBitLength)
386 /* Field definition combined with the access is beyond EOR */
388 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL);
393 /*******************************************************************************
395 * FUNCTION: XfGetParentMethod
397 * PARAMETERS: Op - Parse Op to be checked
399 * RETURN: Control method Op if found. NULL otherwise
401 * DESCRIPTION: Find the control method parent of a parse op. Returns NULL if
402 * the input Op is not within a control method.
404 ******************************************************************************/
406 static ACPI_PARSE_OBJECT *
408 ACPI_PARSE_OBJECT *Op)
410 ACPI_PARSE_OBJECT *NextOp;
413 NextOp = Op->Asl.Parent;
416 if (NextOp->Asl.AmlOpcode == AML_METHOD_OP)
421 NextOp = NextOp->Asl.Parent;
424 return (NULL); /* No parent method found */
427 /*******************************************************************************
429 * FUNCTION: XfNamespaceLocateBegin
431 * PARAMETERS: ASL_WALK_CALLBACK
435 * DESCRIPTION: Descending callback used during cross-reference. For named
436 * object references, attempt to locate the name in the
439 * NOTE: ASL references to named fields within resource descriptors are
440 * resolved to integer values here. Therefore, this step is an
441 * important part of the code generation. We don't know that the
442 * name refers to a resource descriptor until now.
444 ******************************************************************************/
447 XfNamespaceLocateBegin (
448 ACPI_PARSE_OBJECT *Op,
452 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
453 ACPI_NAMESPACE_NODE *Node;
455 ACPI_OBJECT_TYPE ObjectType;
458 ACPI_PARSE_OBJECT *NextOp;
459 ACPI_PARSE_OBJECT *OwningOp;
460 ACPI_PARSE_OBJECT *SpaceIdOp;
461 UINT32 MinimumLength;
463 UINT32 FieldBitLength;
466 const ACPI_OPCODE_INFO *OpInfo;
468 ASL_METHOD_LOCAL *MethodLocals = NULL;
469 ASL_METHOD_LOCAL *MethodArgs = NULL;
474 ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op);
477 if ((Op->Asl.AmlOpcode == AML_METHOD_OP) && Op->Asl.Node)
481 /* Support for method LocalX/ArgX analysis */
483 if (!Node->MethodLocals)
485 /* Create local/arg info blocks */
487 MethodLocals = UtLocalCalloc (
488 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_LOCALS);
489 Node->MethodLocals = MethodLocals;
491 MethodArgs = UtLocalCalloc (
492 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_ARGS);
493 Node->MethodArgs = MethodArgs;
496 * Get the method argument count
497 * First, get the name node
499 NextOp = Op->Asl.Child;
501 /* Get the NumArguments node */
503 NextOp = NextOp->Asl.Next;
504 Node->ArgCount = (UINT8)
505 (((UINT8) NextOp->Asl.Value.Integer) & 0x07);
507 /* We will track all posible ArgXs */
509 for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
511 if (i < Node->ArgCount)
513 /* Real Args are always "initialized" */
515 MethodArgs[i].Flags = ASL_ARG_INITIALIZED;
519 /* Other ArgXs can be used as locals */
521 MethodArgs[i].Flags = ASL_ARG_IS_LOCAL;
524 MethodArgs[i].Op = Op;
530 * If this node is the actual declaration of a name
531 * [such as the XXXX name in "Method (XXXX)"],
532 * we are not interested in it here. We only care about names that are
533 * references to other objects within the namespace and the parent objects
534 * of name declarations
536 if (Op->Asl.CompileFlags & OP_IS_NAME_DECLARATION)
538 return_ACPI_STATUS (AE_OK);
541 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
543 /* Check method LocalX variables */
545 if (OpInfo->Type == AML_TYPE_LOCAL_VARIABLE)
547 /* Find parent method Op */
549 NextOp = XfGetParentMethod (Op);
552 return_ACPI_STATUS (AE_OK);
555 /* Get method node */
557 Node = NextOp->Asl.Node;
559 RegisterNumber = Op->Asl.AmlOpcode & 0x0007; /* 0x60 through 0x67 */
560 MethodLocals = Node->MethodLocals;
562 if (Op->Asl.CompileFlags & OP_IS_TARGET)
564 /* Local is being initialized */
566 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_INITIALIZED;
567 MethodLocals[RegisterNumber].Op = Op;
569 return_ACPI_STATUS (AE_OK);
572 /* Mark this Local as referenced */
574 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_REFERENCED;
575 MethodLocals[RegisterNumber].Op = Op;
577 return_ACPI_STATUS (AE_OK);
580 /* Check method ArgX variables */
582 if (OpInfo->Type == AML_TYPE_METHOD_ARGUMENT)
584 /* Find parent method Op */
586 NextOp = XfGetParentMethod (Op);
589 return_ACPI_STATUS (AE_OK);
592 /* Get method node */
594 Node = NextOp->Asl.Node;
598 RegisterNumber = Op->Asl.AmlOpcode - AML_ARG0; /* 0x68 through 0x6F */
599 MethodArgs = Node->MethodArgs;
601 /* Mark this Arg as referenced */
603 MethodArgs[RegisterNumber].Flags |= ASL_ARG_REFERENCED;
604 MethodArgs[RegisterNumber].Op = Op;
606 if (Op->Asl.CompileFlags & OP_IS_TARGET)
608 /* Arg is being initialized */
610 MethodArgs[RegisterNumber].Flags |= ASL_ARG_INITIALIZED;
613 return_ACPI_STATUS (AE_OK);
617 * After method ArgX and LocalX, we are only interested in opcodes
618 * that have an associated name
620 if ((!(OpInfo->Flags & AML_NAMED)) &&
621 (!(OpInfo->Flags & AML_CREATE)) &&
622 (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) &&
623 (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) &&
624 (Op->Asl.ParseOpcode != PARSEOP_METHODCALL) &&
625 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL))
627 return_ACPI_STATUS (AE_OK);
631 * One special case: CondRefOf operator - we don't care if the name exists
632 * or not at this point, just ignore it, the point of the operator is to
633 * determine if the name exists at runtime.
635 if ((Op->Asl.Parent) &&
636 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF))
638 return_ACPI_STATUS (AE_OK);
642 * We must enable the "search-to-root" for single NameSegs, but
643 * we have to be very careful about opening up scopes
645 Flags = ACPI_NS_SEARCH_PARENT;
646 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
647 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
648 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) ||
649 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
652 * These are name references, do not push the scope stack
655 Flags |= ACPI_NS_DONT_OPEN_SCOPE;
658 /* Get the NamePath from the appropriate place */
660 if (OpInfo->Flags & AML_NAMED)
662 /* For nearly all NAMED operators, the name reference is the first child */
664 Path = Op->Asl.Child->Asl.Value.String;
665 if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
668 * ALIAS is the only oddball opcode, the name declaration
669 * (alias name) is the second operand
671 Path = Op->Asl.Child->Asl.Next->Asl.Value.String;
674 else if (OpInfo->Flags & AML_CREATE)
676 /* Name must appear as the last parameter */
678 NextOp = Op->Asl.Child;
679 while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION))
681 NextOp = NextOp->Asl.Next;
684 Path = NextOp->Asl.Value.String;
688 Path = Op->Asl.Value.String;
691 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
692 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
693 "Type=%s\n", AcpiUtGetTypeName (ObjectType)));
696 * Lookup the name in the namespace. Name must exist at this point, or it
697 * is an invalid reference.
699 * The namespace is also used as a lookup table for references to resource
700 * descriptors and the fields within them.
704 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
705 ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node));
706 if (ACPI_FAILURE (Status))
708 if (Status == AE_NOT_FOUND)
711 * We didn't find the name reference by path -- we can qualify this
712 * a little better before we print an error message
714 if (strlen (Path) == ACPI_NAME_SIZE)
716 /* A simple, one-segment ACPI name */
718 if (XfObjectExists (Path))
721 * There exists such a name, but we couldn't get to it
724 AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op,
725 Op->Asl.ExternalName);
729 /* The name doesn't exist, period */
731 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST,
732 Op, Op->Asl.ExternalName);
737 /* Check for a fully qualified path */
739 if (Path[0] == AML_ROOT_PREFIX)
741 /* Gave full path, the object does not exist */
743 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op,
744 Op->Asl.ExternalName);
749 * We can't tell whether it doesn't exist or just
752 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
753 Op->Asl.ExternalName);
760 return_ACPI_STATUS (Status);
763 /* Check for a reference vs. name declaration */
765 if (!(OpInfo->Flags & AML_NAMED) &&
766 !(OpInfo->Flags & AML_CREATE))
768 /* This node has been referenced, mark it for reference check */
770 Node->Flags |= ANOBJ_IS_REFERENCED;
772 #ifdef __UNDER_DEVELOPMENT
774 /* Check for an illegal reference */
776 XfCheckIllegalReference (Op, Node);
780 /* Attempt to optimize the NamePath */
782 OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node);
785 * 1) Dereference an alias (A name reference that is an alias)
786 * Aliases are not nested, the alias always points to the final object
788 if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) &&
789 (Node->Type == ACPI_TYPE_LOCAL_ALIAS))
791 /* This node points back to the original PARSEOP_ALIAS */
795 /* The first child is the alias target op */
797 NextOp = NextOp->Asl.Child;
799 /* That in turn points back to original target alias node */
801 if (NextOp->Asl.Node)
803 Node = NextOp->Asl.Node;
806 /* Else - forward reference to alias, will be resolved later */
809 /* 2) Check for a reference to a resource descriptor */
811 if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
812 (Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
815 * This was a reference to a field within a resource descriptor.
816 * Extract the associated field offset (either a bit or byte
817 * offset depending on the field type) and change the named
818 * reference into an integer for AML code generation
820 Offset = Node->Value;
821 TagBitLength = Node->Length;
824 * If a field is being created, generate the length (in bits) of
825 * the field. Note: Opcodes other than CreateXxxField and Index
826 * can come through here. For other opcodes, we just need to
827 * convert the resource tag reference to an integer offset.
829 switch (Op->Asl.Parent->Asl.AmlOpcode)
831 case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */
833 * We know the length operand is an integer constant because
834 * we know that it contains a reference to a resource
837 FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer;
840 case AML_CREATE_BIT_FIELD_OP:
845 case AML_CREATE_BYTE_FIELD_OP:
851 case AML_CREATE_WORD_FIELD_OP:
856 case AML_CREATE_DWORD_FIELD_OP:
861 case AML_CREATE_QWORD_FIELD_OP:
872 /* Check the field length against the length of the resource tag */
876 if (TagBitLength < FieldBitLength)
878 Message = ASL_MSG_TAG_SMALLER;
880 else if (TagBitLength > FieldBitLength)
882 Message = ASL_MSG_TAG_LARGER;
888 "Size mismatch, Tag: %u bit%s, Field: %u bit%s",
889 TagBitLength, (TagBitLength > 1) ? "s" : "",
890 FieldBitLength, (FieldBitLength > 1) ? "s" : "");
892 AslError (ASL_WARNING, Message, Op, MsgBuffer);
896 /* Convert the BitOffset to a ByteOffset for certain opcodes */
898 switch (Op->Asl.Parent->Asl.AmlOpcode)
900 case AML_CREATE_BYTE_FIELD_OP:
901 case AML_CREATE_WORD_FIELD_OP:
902 case AML_CREATE_DWORD_FIELD_OP:
903 case AML_CREATE_QWORD_FIELD_OP:
906 Offset = ACPI_DIV_8 (Offset);
914 /* Now convert this node to an integer whose value is the field offset */
916 Op->Asl.AmlLength = 0;
917 Op->Asl.ParseOpcode = PARSEOP_INTEGER;
918 Op->Asl.Value.Integer = (UINT64) Offset;
919 Op->Asl.CompileFlags |= OP_IS_RESOURCE_FIELD;
921 OpcGenerateAmlOpcode (Op);
924 /* 3) Check for a method invocation */
926 else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) &&
927 (Node->Type == ACPI_TYPE_METHOD) &&
929 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) ||
931 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
934 * A reference to a method within one of these opcodes is not an
935 * invocation of the method, it is simply a reference to the method.
937 * September 2016: Removed DeRefOf from this list
939 if ((Op->Asl.Parent) &&
940 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) ||
941 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) ||
942 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)||
943 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE)))
945 return_ACPI_STATUS (AE_OK);
949 * There are two types of method invocation:
950 * 1) Invocation with arguments -- the parser recognizes this
952 * 2) Invocation with no arguments --the parser cannot determine that
953 * this is a method invocation, therefore we have to figure it out
956 if (Node->Type != ACPI_TYPE_METHOD)
958 sprintf (MsgBuffer, "%s is a %s",
959 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
961 AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer);
962 return_ACPI_STATUS (AE_OK);
965 /* Save the method node in the caller's op */
968 if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)
970 return_ACPI_STATUS (AE_OK);
974 * This is a method invocation, with or without arguments.
975 * Count the number of arguments, each appears as a child
976 * under the parent node
978 Op->Asl.ParseOpcode = PARSEOP_METHODCALL;
979 UtSetParseOpName (Op);
982 NextOp = Op->Asl.Child;
987 NextOp = NextOp->Asl.Next;
990 if (Node->Value != ASL_EXTERNAL_METHOD &&
991 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL)
994 * Check the parsed arguments with the number expected by the
995 * method declaration itself
997 if (PassedArgs != Node->Value)
999 sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName,
1002 if (PassedArgs < Node->Value)
1004 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer);
1008 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer);
1014 /* 4) Check for an ASL Field definition */
1016 else if ((Op->Asl.Parent) &&
1017 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) ||
1018 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD)))
1021 * Offset checking for fields. If the parent operation region has a
1022 * constant length (known at compile time), we can check fields
1023 * defined in that region against the region length. This will catch
1024 * fields and field units that cannot possibly fit within the region.
1026 * Note: Index fields do not directly reference an operation region,
1027 * thus they are not included in this check.
1029 if (Op == Op->Asl.Parent->Asl.Child)
1032 * This is the first child of the field node, which is
1033 * the name of the region. Get the parse node for the
1034 * region -- which contains the length of the region.
1036 OwningOp = Node->Op;
1037 Op->Asl.Parent->Asl.ExtraValue =
1038 ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer);
1040 /* Examine the field access width */
1042 switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer)
1044 case AML_FIELD_ACCESS_ANY:
1045 case AML_FIELD_ACCESS_BYTE:
1046 case AML_FIELD_ACCESS_BUFFER:
1052 case AML_FIELD_ACCESS_WORD:
1057 case AML_FIELD_ACCESS_DWORD:
1062 case AML_FIELD_ACCESS_QWORD:
1069 * Is the region at least as big as the access width?
1070 * Note: DataTableRegions have 0 length
1072 if (((UINT32) OwningOp->Asl.Value.Integer) &&
1073 ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength))
1075 AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL);
1079 * Check EC/CMOS/SMBUS fields to make sure that the correct
1080 * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS)
1082 SpaceIdOp = OwningOp->Asl.Child->Asl.Next;
1083 switch ((UINT32) SpaceIdOp->Asl.Value.Integer)
1085 case ACPI_ADR_SPACE_EC:
1086 case ACPI_ADR_SPACE_CMOS:
1087 case ACPI_ADR_SPACE_GPIO:
1089 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer !=
1090 AML_FIELD_ACCESS_BYTE)
1092 AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL);
1096 case ACPI_ADR_SPACE_SMBUS:
1097 case ACPI_ADR_SPACE_IPMI:
1098 case ACPI_ADR_SPACE_GSBUS:
1100 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer !=
1101 AML_FIELD_ACCESS_BUFFER)
1103 AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL);
1109 /* Nothing to do for other address spaces */
1117 * This is one element of the field list. Check to make sure
1118 * that it does not go beyond the end of the parent operation region.
1120 * In the code below:
1121 * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits)
1122 * Op->Asl.ExtraValue - Field start offset (bits)
1123 * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits)
1124 * Op->Asl.Child->Asl.ExtraValue - Field access width (bits)
1126 if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child)
1128 XfCheckFieldRange (Op,
1129 Op->Asl.Parent->Asl.ExtraValue,
1131 (UINT32) Op->Asl.Child->Asl.Value.Integer,
1132 Op->Asl.Child->Asl.ExtraValue);
1137 /* 5) Check for a connection object */
1139 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION)
1141 return_ACPI_STATUS (Status);
1145 Op->Asl.Node = Node;
1146 return_ACPI_STATUS (Status);
1150 /*******************************************************************************
1152 * FUNCTION: XfNamespaceLocateEnd
1154 * PARAMETERS: ASL_WALK_CALLBACK
1158 * DESCRIPTION: Ascending callback used during cross reference. We only
1159 * need to worry about scope management here.
1161 ******************************************************************************/
1164 XfNamespaceLocateEnd (
1165 ACPI_PARSE_OBJECT *Op,
1169 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
1170 const ACPI_OPCODE_INFO *OpInfo;
1173 ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd);
1176 /* We are only interested in opcodes that have an associated name */
1178 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
1179 if (!(OpInfo->Flags & AML_NAMED))
1181 return_ACPI_STATUS (AE_OK);
1184 /* Not interested in name references, we did not open a scope for them */
1186 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
1187 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
1188 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) ||
1189 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL))
1191 return_ACPI_STATUS (AE_OK);
1194 /* Pop the scope stack if necessary */
1196 if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode)))
1199 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
1200 "%s: Popping scope for Op %p\n",
1201 AcpiUtGetTypeName (OpInfo->ObjectType), Op));
1203 (void) AcpiDsScopeStackPop (WalkState);
1206 return_ACPI_STATUS (AE_OK);
1210 #ifdef __UNDER_DEVELOPMENT
1211 /*******************************************************************************
1213 * FUNCTION: XfIsObjectParental
1215 * PARAMETERS: ChildOp - Op to be checked
1216 * PossibleParentOp - Determine if this op is in the family
1218 * RETURN: TRUE if ChildOp is a descendent of PossibleParentOp
1220 * DESCRIPTION: Determine if an Op is a descendent of another Op. Used to
1221 * detect if a method is declared within another method.
1223 ******************************************************************************/
1226 XfIsObjectParental (
1227 ACPI_PARSE_OBJECT *ChildOp,
1228 ACPI_PARSE_OBJECT *PossibleParentOp)
1230 ACPI_PARSE_OBJECT *ParentOp;
1233 /* Search upwards through the tree for possible parent */
1238 if (ParentOp == PossibleParentOp)
1243 ParentOp = ParentOp->Asl.Parent;
1250 /*******************************************************************************
1252 * FUNCTION: XfGetParentMethod
1254 * PARAMETERS: Op - Op to be checked
1256 * RETURN: Op for parent method. NULL if object is not within a method.
1258 * DESCRIPTION: Determine if an object is within a control method. Used to
1259 * implement special rules for named references from within a
1262 * NOTE: It would be better to have the parser set a flag in the Op if possible.
1264 ******************************************************************************/
1266 static ACPI_PARSE_OBJECT *
1268 ACPI_PARSE_OBJECT *Op)
1270 ACPI_PARSE_OBJECT *ParentOp;
1278 if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
1283 /* Walk upwards through the parse tree, up to the root if necessary */
1288 if (ParentOp->Asl.ParseOpcode == PARSEOP_METHOD)
1293 ParentOp = ParentOp->Asl.Parent;
1296 /* Object is not within a method */
1302 /*******************************************************************************
1304 * FUNCTION: XfCheckIllegalReference
1306 * PARAMETERS: Op - Op referring to the target
1307 * TargetNode - Target of the reference
1309 * RETURN: None. Emits error message for an illegal reference
1311 * DESCRIPTION: Determine if a named reference is legal. A "named" reference
1312 * is something like: Store(ABCD, ...), where ABCD is an AML
1313 * Nameseg or Namepath.
1315 * NOTE: Caller must ensure that the name Op is in fact a reference, and not
1316 * an actual name declaration (creation of a named object).
1318 ******************************************************************************/
1321 XfCheckIllegalReference (
1322 ACPI_PARSE_OBJECT *Op,
1323 ACPI_NAMESPACE_NODE *TargetNode)
1325 ACPI_PARSE_OBJECT *MethodOp1;
1326 ACPI_PARSE_OBJECT *MethodOp2;
1327 ACPI_PARSE_OBJECT *TargetOp;
1331 * Check for an illegal reference to a named object:
1333 * 1) References from one control method to another, non-parent
1334 * method are not allowed, they will fail at runtime.
1336 * 2) Forward references within a control method are not allowed.
1337 * AML interpreters use a one-pass parse of control methods
1338 * so these forward references will fail at runtime.
1340 TargetOp = TargetNode->Op;
1342 MethodOp1 = XfGetParentMethod (Op);
1343 MethodOp2 = XfGetParentMethod (TargetOp);
1345 /* Are both objects within control method(s)? */
1347 if (!MethodOp1 || !MethodOp2)
1352 /* Objects not in the same method? */
1354 if (MethodOp1 != MethodOp2)
1357 * 1) Cross-method named reference
1359 * This is OK if and only if the target reference is within in a
1360 * method that is a parent of current method
1362 if (!XfIsObjectParental (MethodOp1, MethodOp2))
1364 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_METHOD_REF, Op,
1365 Op->Asl.ExternalName);
1370 * 2) Both reference and target are in the same method. Check if this is
1371 * an (illegal) forward reference by examining the exact source code
1372 * location of each (the referenced object and the object declaration).
1373 * This is a bit nasty, yet effective.
1375 else if (Op->Asl.LogicalByteOffset < TargetOp->Asl.LogicalByteOffset)
1377 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op,
1378 Op->Asl.ExternalName);