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 & NODE_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 & NODE_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 & NODE_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))
626 return_ACPI_STATUS (AE_OK);
630 * One special case: CondRefOf operator - we don't care if the name exists
631 * or not at this point, just ignore it, the point of the operator is to
632 * determine if the name exists at runtime.
634 if ((Op->Asl.Parent) &&
635 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF))
637 return_ACPI_STATUS (AE_OK);
641 * We must enable the "search-to-root" for single NameSegs, but
642 * we have to be very careful about opening up scopes
644 Flags = ACPI_NS_SEARCH_PARENT;
645 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
646 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
647 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
650 * These are name references, do not push the scope stack
653 Flags |= ACPI_NS_DONT_OPEN_SCOPE;
656 /* Get the NamePath from the appropriate place */
658 if (OpInfo->Flags & AML_NAMED)
660 /* For nearly all NAMED operators, the name reference is the first child */
662 Path = Op->Asl.Child->Asl.Value.String;
663 if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
666 * ALIAS is the only oddball opcode, the name declaration
667 * (alias name) is the second operand
669 Path = Op->Asl.Child->Asl.Next->Asl.Value.String;
672 else if (OpInfo->Flags & AML_CREATE)
674 /* Name must appear as the last parameter */
676 NextOp = Op->Asl.Child;
677 while (!(NextOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION))
679 NextOp = NextOp->Asl.Next;
682 Path = NextOp->Asl.Value.String;
686 Path = Op->Asl.Value.String;
689 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
690 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
691 "Type=%s\n", AcpiUtGetTypeName (ObjectType)));
694 * Lookup the name in the namespace. Name must exist at this point, or it
695 * is an invalid reference.
697 * The namespace is also used as a lookup table for references to resource
698 * descriptors and the fields within them.
702 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
703 ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node));
704 if (ACPI_FAILURE (Status))
706 if (Status == AE_NOT_FOUND)
709 * We didn't find the name reference by path -- we can qualify this
710 * a little better before we print an error message
712 if (strlen (Path) == ACPI_NAME_SIZE)
714 /* A simple, one-segment ACPI name */
716 if (XfObjectExists (Path))
719 * There exists such a name, but we couldn't get to it
722 AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op,
723 Op->Asl.ExternalName);
727 /* The name doesn't exist, period */
729 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST,
730 Op, Op->Asl.ExternalName);
735 /* Check for a fully qualified path */
737 if (Path[0] == AML_ROOT_PREFIX)
739 /* Gave full path, the object does not exist */
741 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op,
742 Op->Asl.ExternalName);
747 * We can't tell whether it doesn't exist or just
750 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
751 Op->Asl.ExternalName);
758 return_ACPI_STATUS (Status);
761 /* Check for a reference vs. name declaration */
763 if (!(OpInfo->Flags & AML_NAMED) &&
764 !(OpInfo->Flags & AML_CREATE))
766 /* This node has been referenced, mark it for reference check */
768 Node->Flags |= ANOBJ_IS_REFERENCED;
770 #ifdef __UNDER_DEVELOPMENT
772 /* Check for an illegal reference */
774 XfCheckIllegalReference (Op, Node);
778 /* Attempt to optimize the NamePath */
780 OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node);
783 * 1) Dereference an alias (A name reference that is an alias)
784 * Aliases are not nested, the alias always points to the final object
786 if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) &&
787 (Node->Type == ACPI_TYPE_LOCAL_ALIAS))
789 /* This node points back to the original PARSEOP_ALIAS */
793 /* The first child is the alias target op */
795 NextOp = NextOp->Asl.Child;
797 /* That in turn points back to original target alias node */
799 if (NextOp->Asl.Node)
801 Node = NextOp->Asl.Node;
804 /* Else - forward reference to alias, will be resolved later */
807 /* 2) Check for a reference to a resource descriptor */
809 if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
810 (Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
813 * This was a reference to a field within a resource descriptor.
814 * Extract the associated field offset (either a bit or byte
815 * offset depending on the field type) and change the named
816 * reference into an integer for AML code generation
818 Offset = Node->Value;
819 TagBitLength = Node->Length;
822 * If a field is being created, generate the length (in bits) of
823 * the field. Note: Opcodes other than CreateXxxField and Index
824 * can come through here. For other opcodes, we just need to
825 * convert the resource tag reference to an integer offset.
827 switch (Op->Asl.Parent->Asl.AmlOpcode)
829 case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */
831 * We know the length operand is an integer constant because
832 * we know that it contains a reference to a resource
835 FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer;
838 case AML_CREATE_BIT_FIELD_OP:
843 case AML_CREATE_BYTE_FIELD_OP:
849 case AML_CREATE_WORD_FIELD_OP:
854 case AML_CREATE_DWORD_FIELD_OP:
859 case AML_CREATE_QWORD_FIELD_OP:
870 /* Check the field length against the length of the resource tag */
874 if (TagBitLength < FieldBitLength)
876 Message = ASL_MSG_TAG_SMALLER;
878 else if (TagBitLength > FieldBitLength)
880 Message = ASL_MSG_TAG_LARGER;
886 "Size mismatch, Tag: %u bit%s, Field: %u bit%s",
887 TagBitLength, (TagBitLength > 1) ? "s" : "",
888 FieldBitLength, (FieldBitLength > 1) ? "s" : "");
890 AslError (ASL_WARNING, Message, Op, MsgBuffer);
894 /* Convert the BitOffset to a ByteOffset for certain opcodes */
896 switch (Op->Asl.Parent->Asl.AmlOpcode)
898 case AML_CREATE_BYTE_FIELD_OP:
899 case AML_CREATE_WORD_FIELD_OP:
900 case AML_CREATE_DWORD_FIELD_OP:
901 case AML_CREATE_QWORD_FIELD_OP:
904 Offset = ACPI_DIV_8 (Offset);
912 /* Now convert this node to an integer whose value is the field offset */
914 Op->Asl.AmlLength = 0;
915 Op->Asl.ParseOpcode = PARSEOP_INTEGER;
916 Op->Asl.Value.Integer = (UINT64) Offset;
917 Op->Asl.CompileFlags |= NODE_IS_RESOURCE_FIELD;
919 OpcGenerateAmlOpcode (Op);
922 /* 3) Check for a method invocation */
924 else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) &&
925 (Node->Type == ACPI_TYPE_METHOD) &&
927 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) ||
929 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
932 * A reference to a method within one of these opcodes is not an
933 * invocation of the method, it is simply a reference to the method.
935 * September 2016: Removed DeRefOf from this list
937 if ((Op->Asl.Parent) &&
938 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) ||
939 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) ||
940 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)||
941 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE)))
943 return_ACPI_STATUS (AE_OK);
947 * There are two types of method invocation:
948 * 1) Invocation with arguments -- the parser recognizes this
950 * 2) Invocation with no arguments --the parser cannot determine that
951 * this is a method invocation, therefore we have to figure it out
954 if (Node->Type != ACPI_TYPE_METHOD)
956 sprintf (MsgBuffer, "%s is a %s",
957 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
959 AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer);
960 return_ACPI_STATUS (AE_OK);
963 /* Save the method node in the caller's op */
966 if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)
968 return_ACPI_STATUS (AE_OK);
972 * This is a method invocation, with or without arguments.
973 * Count the number of arguments, each appears as a child
974 * under the parent node
976 Op->Asl.ParseOpcode = PARSEOP_METHODCALL;
977 UtSetParseOpName (Op);
980 NextOp = Op->Asl.Child;
985 NextOp = NextOp->Asl.Next;
988 if (Node->Value != ASL_EXTERNAL_METHOD &&
989 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL)
992 * Check the parsed arguments with the number expected by the
993 * method declaration itself
995 if (PassedArgs != Node->Value)
997 sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName,
1000 if (PassedArgs < Node->Value)
1002 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer);
1006 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer);
1012 /* 4) Check for an ASL Field definition */
1014 else if ((Op->Asl.Parent) &&
1015 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) ||
1016 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD)))
1019 * Offset checking for fields. If the parent operation region has a
1020 * constant length (known at compile time), we can check fields
1021 * defined in that region against the region length. This will catch
1022 * fields and field units that cannot possibly fit within the region.
1024 * Note: Index fields do not directly reference an operation region,
1025 * thus they are not included in this check.
1027 if (Op == Op->Asl.Parent->Asl.Child)
1030 * This is the first child of the field node, which is
1031 * the name of the region. Get the parse node for the
1032 * region -- which contains the length of the region.
1034 OwningOp = Node->Op;
1035 Op->Asl.Parent->Asl.ExtraValue =
1036 ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer);
1038 /* Examine the field access width */
1040 switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer)
1042 case AML_FIELD_ACCESS_ANY:
1043 case AML_FIELD_ACCESS_BYTE:
1044 case AML_FIELD_ACCESS_BUFFER:
1050 case AML_FIELD_ACCESS_WORD:
1055 case AML_FIELD_ACCESS_DWORD:
1060 case AML_FIELD_ACCESS_QWORD:
1067 * Is the region at least as big as the access width?
1068 * Note: DataTableRegions have 0 length
1070 if (((UINT32) OwningOp->Asl.Value.Integer) &&
1071 ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength))
1073 AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL);
1077 * Check EC/CMOS/SMBUS fields to make sure that the correct
1078 * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS)
1080 SpaceIdOp = OwningOp->Asl.Child->Asl.Next;
1081 switch ((UINT32) SpaceIdOp->Asl.Value.Integer)
1083 case ACPI_ADR_SPACE_EC:
1084 case ACPI_ADR_SPACE_CMOS:
1085 case ACPI_ADR_SPACE_GPIO:
1087 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer !=
1088 AML_FIELD_ACCESS_BYTE)
1090 AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL);
1094 case ACPI_ADR_SPACE_SMBUS:
1095 case ACPI_ADR_SPACE_IPMI:
1096 case ACPI_ADR_SPACE_GSBUS:
1098 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer !=
1099 AML_FIELD_ACCESS_BUFFER)
1101 AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL);
1107 /* Nothing to do for other address spaces */
1115 * This is one element of the field list. Check to make sure
1116 * that it does not go beyond the end of the parent operation region.
1118 * In the code below:
1119 * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits)
1120 * Op->Asl.ExtraValue - Field start offset (bits)
1121 * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits)
1122 * Op->Asl.Child->Asl.ExtraValue - Field access width (bits)
1124 if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child)
1126 XfCheckFieldRange (Op,
1127 Op->Asl.Parent->Asl.ExtraValue,
1129 (UINT32) Op->Asl.Child->Asl.Value.Integer,
1130 Op->Asl.Child->Asl.ExtraValue);
1135 /* 5) Check for a connection object */
1137 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION)
1139 return_ACPI_STATUS (Status);
1143 Op->Asl.Node = Node;
1144 return_ACPI_STATUS (Status);
1148 /*******************************************************************************
1150 * FUNCTION: XfNamespaceLocateEnd
1152 * PARAMETERS: ASL_WALK_CALLBACK
1156 * DESCRIPTION: Ascending callback used during cross reference. We only
1157 * need to worry about scope management here.
1159 ******************************************************************************/
1162 XfNamespaceLocateEnd (
1163 ACPI_PARSE_OBJECT *Op,
1167 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
1168 const ACPI_OPCODE_INFO *OpInfo;
1171 ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd);
1174 /* We are only interested in opcodes that have an associated name */
1176 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
1177 if (!(OpInfo->Flags & AML_NAMED))
1179 return_ACPI_STATUS (AE_OK);
1182 /* Not interested in name references, we did not open a scope for them */
1184 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
1185 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
1186 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
1188 return_ACPI_STATUS (AE_OK);
1191 /* Pop the scope stack if necessary */
1193 if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode)))
1196 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
1197 "%s: Popping scope for Op %p\n",
1198 AcpiUtGetTypeName (OpInfo->ObjectType), Op));
1200 (void) AcpiDsScopeStackPop (WalkState);
1203 return_ACPI_STATUS (AE_OK);
1207 #ifdef __UNDER_DEVELOPMENT
1208 /*******************************************************************************
1210 * FUNCTION: XfIsObjectParental
1212 * PARAMETERS: ChildOp - Op to be checked
1213 * PossibleParentOp - Determine if this op is in the family
1215 * RETURN: TRUE if ChildOp is a descendent of PossibleParentOp
1217 * DESCRIPTION: Determine if an Op is a descendent of another Op. Used to
1218 * detect if a method is declared within another method.
1220 ******************************************************************************/
1223 XfIsObjectParental (
1224 ACPI_PARSE_OBJECT *ChildOp,
1225 ACPI_PARSE_OBJECT *PossibleParentOp)
1227 ACPI_PARSE_OBJECT *ParentOp;
1230 /* Search upwards through the tree for possible parent */
1235 if (ParentOp == PossibleParentOp)
1240 ParentOp = ParentOp->Asl.Parent;
1247 /*******************************************************************************
1249 * FUNCTION: XfGetParentMethod
1251 * PARAMETERS: Op - Op to be checked
1253 * RETURN: Op for parent method. NULL if object is not within a method.
1255 * DESCRIPTION: Determine if an object is within a control method. Used to
1256 * implement special rules for named references from within a
1259 * NOTE: It would be better to have the parser set a flag in the Op if possible.
1261 ******************************************************************************/
1263 static ACPI_PARSE_OBJECT *
1265 ACPI_PARSE_OBJECT *Op)
1267 ACPI_PARSE_OBJECT *ParentOp;
1275 if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
1280 /* Walk upwards through the parse tree, up to the root if necessary */
1285 if (ParentOp->Asl.ParseOpcode == PARSEOP_METHOD)
1290 ParentOp = ParentOp->Asl.Parent;
1293 /* Object is not within a method */
1299 /*******************************************************************************
1301 * FUNCTION: XfCheckIllegalReference
1303 * PARAMETERS: Op - Op referring to the target
1304 * TargetNode - Target of the reference
1306 * RETURN: None. Emits error message for an illegal reference
1308 * DESCRIPTION: Determine if a named reference is legal. A "named" reference
1309 * is something like: Store(ABCD, ...), where ABCD is an AML
1310 * Nameseg or Namepath.
1312 * NOTE: Caller must ensure that the name Op is in fact a reference, and not
1313 * an actual name declaration (creation of a named object).
1315 ******************************************************************************/
1318 XfCheckIllegalReference (
1319 ACPI_PARSE_OBJECT *Op,
1320 ACPI_NAMESPACE_NODE *TargetNode)
1322 ACPI_PARSE_OBJECT *MethodOp1;
1323 ACPI_PARSE_OBJECT *MethodOp2;
1324 ACPI_PARSE_OBJECT *TargetOp;
1328 * Check for an illegal reference to a named object:
1330 * 1) References from one control method to another, non-parent
1331 * method are not allowed, they will fail at runtime.
1333 * 2) Forward references within a control method are not allowed.
1334 * AML interpreters use a one-pass parse of control methods
1335 * so these forward references will fail at runtime.
1337 TargetOp = TargetNode->Op;
1339 MethodOp1 = XfGetParentMethod (Op);
1340 MethodOp2 = XfGetParentMethod (TargetOp);
1342 /* Are both objects within control method(s)? */
1344 if (!MethodOp1 || !MethodOp2)
1349 /* Objects not in the same method? */
1351 if (MethodOp1 != MethodOp2)
1354 * 1) Cross-method named reference
1356 * This is OK if and only if the target reference is within in a
1357 * method that is a parent of current method
1359 if (!XfIsObjectParental (MethodOp1, MethodOp2))
1361 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_METHOD_REF, Op,
1362 Op->Asl.ExternalName);
1367 * 2) Both reference and target are in the same method. Check if this is
1368 * an (illegal) forward reference by examining the exact source code
1369 * location of each (the referenced object and the object declaration).
1370 * This is a bit nasty, yet effective.
1372 else if (Op->Asl.LogicalByteOffset < TargetOp->Asl.LogicalByteOffset)
1374 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op,
1375 Op->Asl.ExternalName);