1 /******************************************************************************
3 * Module Name: aslxref - Namespace cross-reference
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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41 * POSSIBILITY OF SUCH DAMAGES.
44 #include <contrib/dev/acpica/compiler/aslcompiler.h>
45 #include "aslcompiler.y.h"
46 #include <contrib/dev/acpica/include/acparser.h>
47 #include <contrib/dev/acpica/include/amlcode.h>
48 #include <contrib/dev/acpica/include/acnamesp.h>
49 #include <contrib/dev/acpica/include/acdispat.h>
52 #define _COMPONENT ACPI_COMPILER
53 ACPI_MODULE_NAME ("aslxref")
55 /* Local prototypes */
58 XfNamespaceLocateBegin (
59 ACPI_PARSE_OBJECT *Op,
64 XfNamespaceLocateEnd (
65 ACPI_PARSE_OBJECT *Op,
69 static ACPI_PARSE_OBJECT *
71 ACPI_PARSE_OBJECT *Op);
78 XfCompareOneNamespaceObject (
79 ACPI_HANDLE ObjHandle,
86 ACPI_PARSE_OBJECT *Op,
87 UINT32 RegionBitLength,
88 UINT32 FieldBitOffset,
89 UINT32 FieldBitLength,
90 UINT32 AccessBitWidth);
92 #ifdef __UNDER_DEVELOPMENT
93 static ACPI_PARSE_OBJECT *
95 ACPI_PARSE_OBJECT *Op);
98 XfCheckIllegalReference (
99 ACPI_PARSE_OBJECT *Op,
100 ACPI_NAMESPACE_NODE *Node);
104 ACPI_PARSE_OBJECT *MethodOp1,
105 ACPI_PARSE_OBJECT *MethodOp2);
109 /*******************************************************************************
111 * FUNCTION: XfCrossReferenceNamespace
117 * DESCRIPTION: Perform a cross reference check of the parse tree against the
118 * namespace. Every named referenced within the parse tree
119 * should be get resolved with a namespace lookup. If not, the
120 * original reference in the ASL code is invalid -- i.e., refers
121 * to a non-existent object.
123 * NOTE: The ASL "External" operator causes the name to be inserted into the
124 * namespace so that references to the external name will be resolved
127 ******************************************************************************/
130 XfCrossReferenceNamespace (
133 ACPI_WALK_STATE *WalkState;
137 * Create a new walk state for use when looking up names
138 * within the namespace (Passed as context to the callbacks)
140 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
143 return (AE_NO_MEMORY);
146 /* Walk the entire parse tree */
148 TrWalkParseTree (Gbl_ParseTreeRoot, ASL_WALK_VISIT_TWICE,
149 XfNamespaceLocateBegin, XfNamespaceLocateEnd, WalkState);
151 ACPI_FREE (WalkState);
156 /*******************************************************************************
158 * FUNCTION: XfObjectExists
160 * PARAMETERS: Name - 4 char ACPI name
162 * RETURN: TRUE if name exists in namespace
164 * DESCRIPTION: Walk the namespace to find an object
166 ******************************************************************************/
175 /* Walk entire namespace from the supplied root */
177 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
178 ACPI_UINT32_MAX, FALSE, XfCompareOneNamespaceObject, NULL,
180 if (Status == AE_CTRL_TRUE)
182 /* At least one instance of the name was found */
191 /*******************************************************************************
193 * FUNCTION: XfCompareOneNamespaceObject
195 * PARAMETERS: ACPI_WALK_CALLBACK
199 * DESCRIPTION: Compare name of one object.
201 ******************************************************************************/
204 XfCompareOneNamespaceObject (
205 ACPI_HANDLE ObjHandle,
210 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
213 /* Simply check the name */
215 if (*((UINT32 *) (Context)) == Node->Name.Integer)
217 /* Abort walk if we found one instance */
219 return (AE_CTRL_TRUE);
226 /*******************************************************************************
228 * FUNCTION: XfCheckFieldRange
230 * PARAMETERS: RegionBitLength - Length of entire parent region
231 * FieldBitOffset - Start of the field unit (within region)
232 * FieldBitLength - Entire length of field unit
233 * AccessBitWidth - Access width of the field unit
237 * DESCRIPTION: Check one field unit to make sure it fits in the parent
240 * Note: AccessBitWidth must be either 8,16,32, or 64
242 ******************************************************************************/
246 ACPI_PARSE_OBJECT *Op,
247 UINT32 RegionBitLength,
248 UINT32 FieldBitOffset,
249 UINT32 FieldBitLength,
250 UINT32 AccessBitWidth)
252 UINT32 FieldEndBitOffset;
256 * Check each field unit against the region size. The entire
257 * field unit (start offset plus length) must fit within the
260 FieldEndBitOffset = FieldBitOffset + FieldBitLength;
262 if (FieldEndBitOffset > RegionBitLength)
264 /* Field definition itself is beyond the end-of-region */
266 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL);
271 * Now check that the field plus AccessWidth doesn't go beyond
272 * the end-of-region. Assumes AccessBitWidth is a power of 2
274 FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth);
276 if (FieldEndBitOffset > RegionBitLength)
278 /* Field definition combined with the access is beyond EOR */
280 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL);
285 /*******************************************************************************
287 * FUNCTION: XfGetParentMethod
289 * PARAMETERS: Op - Parse Op to be checked
291 * RETURN: Control method Op if found. NULL otherwise
293 * DESCRIPTION: Find the control method parent of a parse op. Returns NULL if
294 * the input Op is not within a control method.
296 ******************************************************************************/
298 static ACPI_PARSE_OBJECT *
300 ACPI_PARSE_OBJECT *Op)
302 ACPI_PARSE_OBJECT *NextOp;
305 NextOp = Op->Asl.Parent;
308 if (NextOp->Asl.AmlOpcode == AML_METHOD_OP)
313 NextOp = NextOp->Asl.Parent;
316 return (NULL); /* No parent method found */
319 /*******************************************************************************
321 * FUNCTION: XfNamespaceLocateBegin
323 * PARAMETERS: ASL_WALK_CALLBACK
327 * DESCRIPTION: Descending callback used during cross-reference. For named
328 * object references, attempt to locate the name in the
331 * NOTE: ASL references to named fields within resource descriptors are
332 * resolved to integer values here. Therefore, this step is an
333 * important part of the code generation. We don't know that the
334 * name refers to a resource descriptor until now.
336 ******************************************************************************/
339 XfNamespaceLocateBegin (
340 ACPI_PARSE_OBJECT *Op,
344 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
345 ACPI_NAMESPACE_NODE *Node;
347 ACPI_OBJECT_TYPE ObjectType;
350 ACPI_PARSE_OBJECT *NextOp;
351 ACPI_PARSE_OBJECT *OwningOp;
352 ACPI_PARSE_OBJECT *SpaceIdOp;
353 UINT32 MinimumLength;
355 UINT32 FieldBitLength;
358 const ACPI_OPCODE_INFO *OpInfo;
360 ASL_METHOD_LOCAL *MethodLocals = NULL;
361 ASL_METHOD_LOCAL *MethodArgs = NULL;
366 ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op);
369 if ((Op->Asl.AmlOpcode == AML_METHOD_OP) && Op->Asl.Node)
373 /* Support for method LocalX/ArgX analysis */
375 if (!Node->MethodLocals)
377 /* Create local/arg info blocks */
379 MethodLocals = UtLocalCalloc (
380 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_LOCALS);
381 Node->MethodLocals = MethodLocals;
383 MethodArgs = UtLocalCalloc (
384 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_ARGS);
385 Node->MethodArgs = MethodArgs;
388 * Get the method argument count
389 * First, get the name node
391 NextOp = Op->Asl.Child;
393 /* Get the NumArguments node */
395 NextOp = NextOp->Asl.Next;
396 Node->ArgCount = (UINT8)
397 (((UINT8) NextOp->Asl.Value.Integer) & 0x07);
399 /* We will track all posible ArgXs */
401 for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
403 if (i < Node->ArgCount)
405 /* Real Args are always "initialized" */
407 MethodArgs[i].Flags = ASL_ARG_INITIALIZED;
411 /* Other ArgXs can be used as locals */
413 MethodArgs[i].Flags = ASL_ARG_IS_LOCAL;
416 MethodArgs[i].Op = Op;
422 * If this node is the actual declaration of a name
423 * [such as the XXXX name in "Method (XXXX)"],
424 * we are not interested in it here. We only care about names that are
425 * references to other objects within the namespace and the parent objects
426 * of name declarations
428 if (Op->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)
430 return_ACPI_STATUS (AE_OK);
433 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
435 /* Check method LocalX variables */
437 if (OpInfo->Type == AML_TYPE_LOCAL_VARIABLE)
439 /* Find parent method Op */
441 NextOp = XfGetParentMethod (Op);
444 return_ACPI_STATUS (AE_OK);
447 /* Get method node */
449 Node = NextOp->Asl.Node;
451 RegisterNumber = Op->Asl.AmlOpcode & 0x0007; /* 0x60 through 0x67 */
452 MethodLocals = Node->MethodLocals;
454 if (Op->Asl.CompileFlags & NODE_IS_TARGET)
456 /* Local is being initialized */
458 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_INITIALIZED;
459 MethodLocals[RegisterNumber].Op = Op;
461 return_ACPI_STATUS (AE_OK);
464 /* Mark this Local as referenced */
466 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_REFERENCED;
467 MethodLocals[RegisterNumber].Op = Op;
469 return_ACPI_STATUS (AE_OK);
472 /* Check method ArgX variables */
474 if (OpInfo->Type == AML_TYPE_METHOD_ARGUMENT)
476 /* Find parent method Op */
478 NextOp = XfGetParentMethod (Op);
481 return_ACPI_STATUS (AE_OK);
484 /* Get method node */
486 Node = NextOp->Asl.Node;
490 RegisterNumber = Op->Asl.AmlOpcode - AML_ARG0; /* 0x68 through 0x6F */
491 MethodArgs = Node->MethodArgs;
493 if (Op->Asl.CompileFlags & NODE_IS_TARGET)
495 /* Arg is being initialized */
497 MethodArgs[RegisterNumber].Flags |= ASL_ARG_INITIALIZED;
498 MethodArgs[RegisterNumber].Op = Op;
500 return_ACPI_STATUS (AE_OK);
503 /* Mark this Arg as referenced */
505 MethodArgs[RegisterNumber].Flags |= ASL_ARG_REFERENCED;
506 MethodArgs[RegisterNumber].Op = Op;
508 return_ACPI_STATUS (AE_OK);
512 * After method ArgX and LocalX, we are only interested in opcodes
513 * that have an associated name
515 if ((!(OpInfo->Flags & AML_NAMED)) &&
516 (!(OpInfo->Flags & AML_CREATE)) &&
517 (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) &&
518 (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) &&
519 (Op->Asl.ParseOpcode != PARSEOP_METHODCALL))
521 return_ACPI_STATUS (AE_OK);
525 * One special case: CondRefOf operator - we don't care if the name exists
526 * or not at this point, just ignore it, the point of the operator is to
527 * determine if the name exists at runtime.
529 if ((Op->Asl.Parent) &&
530 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF))
532 return_ACPI_STATUS (AE_OK);
536 * We must enable the "search-to-root" for single NameSegs, but
537 * we have to be very careful about opening up scopes
539 Flags = ACPI_NS_SEARCH_PARENT;
540 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
541 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
542 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
545 * These are name references, do not push the scope stack
548 Flags |= ACPI_NS_DONT_OPEN_SCOPE;
551 /* Get the NamePath from the appropriate place */
553 if (OpInfo->Flags & AML_NAMED)
555 /* For nearly all NAMED operators, the name reference is the first child */
557 Path = Op->Asl.Child->Asl.Value.String;
558 if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
561 * ALIAS is the only oddball opcode, the name declaration
562 * (alias name) is the second operand
564 Path = Op->Asl.Child->Asl.Next->Asl.Value.String;
567 else if (OpInfo->Flags & AML_CREATE)
569 /* Name must appear as the last parameter */
571 NextOp = Op->Asl.Child;
572 while (!(NextOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION))
574 NextOp = NextOp->Asl.Next;
577 Path = NextOp->Asl.Value.String;
581 Path = Op->Asl.Value.String;
584 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
585 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
586 "Type=%s\n", AcpiUtGetTypeName (ObjectType)));
589 * Lookup the name in the namespace. Name must exist at this point, or it
590 * is an invalid reference.
592 * The namespace is also used as a lookup table for references to resource
593 * descriptors and the fields within them.
597 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
598 ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node));
599 if (ACPI_FAILURE (Status))
601 if (Status == AE_NOT_FOUND)
604 * We didn't find the name reference by path -- we can qualify this
605 * a little better before we print an error message
607 if (strlen (Path) == ACPI_NAME_SIZE)
609 /* A simple, one-segment ACPI name */
611 if (XfObjectExists (Path))
614 * There exists such a name, but we couldn't get to it
617 AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op,
618 Op->Asl.ExternalName);
622 /* The name doesn't exist, period */
624 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST,
625 Op, Op->Asl.ExternalName);
630 /* Check for a fully qualified path */
632 if (Path[0] == AML_ROOT_PREFIX)
634 /* Gave full path, the object does not exist */
636 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op,
637 Op->Asl.ExternalName);
642 * We can't tell whether it doesn't exist or just
645 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op,
646 Op->Asl.ExternalName);
653 return_ACPI_STATUS (Status);
656 /* Check for a reference vs. name declaration */
658 if (!(OpInfo->Flags & AML_NAMED) &&
659 !(OpInfo->Flags & AML_CREATE))
661 /* This node has been referenced, mark it for reference check */
663 Node->Flags |= ANOBJ_IS_REFERENCED;
665 #ifdef __UNDER_DEVELOPMENT
667 /* Check for an illegal reference */
669 XfCheckIllegalReference (Op, Node);
673 /* Attempt to optimize the NamePath */
675 OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node);
678 * 1) Dereference an alias (A name reference that is an alias)
679 * Aliases are not nested, the alias always points to the final object
681 if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) &&
682 (Node->Type == ACPI_TYPE_LOCAL_ALIAS))
684 /* This node points back to the original PARSEOP_ALIAS */
688 /* The first child is the alias target op */
690 NextOp = NextOp->Asl.Child;
692 /* That in turn points back to original target alias node */
694 if (NextOp->Asl.Node)
696 Node = NextOp->Asl.Node;
699 /* Else - forward reference to alias, will be resolved later */
702 /* 2) Check for a reference to a resource descriptor */
704 if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
705 (Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
708 * This was a reference to a field within a resource descriptor.
709 * Extract the associated field offset (either a bit or byte
710 * offset depending on the field type) and change the named
711 * reference into an integer for AML code generation
713 Offset = Node->Value;
714 TagBitLength = Node->Length;
717 * If a field is being created, generate the length (in bits) of
718 * the field. Note: Opcodes other than CreateXxxField and Index
719 * can come through here. For other opcodes, we just need to
720 * convert the resource tag reference to an integer offset.
722 switch (Op->Asl.Parent->Asl.AmlOpcode)
724 case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */
726 * We know the length operand is an integer constant because
727 * we know that it contains a reference to a resource
730 FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer;
733 case AML_CREATE_BIT_FIELD_OP:
738 case AML_CREATE_BYTE_FIELD_OP:
744 case AML_CREATE_WORD_FIELD_OP:
749 case AML_CREATE_DWORD_FIELD_OP:
754 case AML_CREATE_QWORD_FIELD_OP:
765 /* Check the field length against the length of the resource tag */
769 if (TagBitLength < FieldBitLength)
771 Message = ASL_MSG_TAG_SMALLER;
773 else if (TagBitLength > FieldBitLength)
775 Message = ASL_MSG_TAG_LARGER;
781 "Size mismatch, Tag: %u bit%s, Field: %u bit%s",
782 TagBitLength, (TagBitLength > 1) ? "s" : "",
783 FieldBitLength, (FieldBitLength > 1) ? "s" : "");
785 AslError (ASL_WARNING, Message, Op, MsgBuffer);
789 /* Convert the BitOffset to a ByteOffset for certain opcodes */
791 switch (Op->Asl.Parent->Asl.AmlOpcode)
793 case AML_CREATE_BYTE_FIELD_OP:
794 case AML_CREATE_WORD_FIELD_OP:
795 case AML_CREATE_DWORD_FIELD_OP:
796 case AML_CREATE_QWORD_FIELD_OP:
799 Offset = ACPI_DIV_8 (Offset);
807 /* Now convert this node to an integer whose value is the field offset */
809 Op->Asl.AmlLength = 0;
810 Op->Asl.ParseOpcode = PARSEOP_INTEGER;
811 Op->Asl.Value.Integer = (UINT64) Offset;
812 Op->Asl.CompileFlags |= NODE_IS_RESOURCE_FIELD;
814 OpcGenerateAmlOpcode (Op);
817 /* 3) Check for a method invocation */
819 else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) &&
820 (Node->Type == ACPI_TYPE_METHOD) &&
822 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) ||
824 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
827 * A reference to a method within one of these opcodes is not an
828 * invocation of the method, it is simply a reference to the method.
830 if ((Op->Asl.Parent) &&
831 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) ||
832 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_DEREFOF) ||
833 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) ||
834 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)||
835 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE)))
837 return_ACPI_STATUS (AE_OK);
840 * There are two types of method invocation:
841 * 1) Invocation with arguments -- the parser recognizes this
843 * 2) Invocation with no arguments --the parser cannot determine that
844 * this is a method invocation, therefore we have to figure it out
847 if (Node->Type != ACPI_TYPE_METHOD)
849 sprintf (MsgBuffer, "%s is a %s",
850 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type));
852 AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer);
853 return_ACPI_STATUS (AE_OK);
856 /* Save the method node in the caller's op */
859 if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)
861 return_ACPI_STATUS (AE_OK);
865 * This is a method invocation, with or without arguments.
866 * Count the number of arguments, each appears as a child
867 * under the parent node
869 Op->Asl.ParseOpcode = PARSEOP_METHODCALL;
870 UtSetParseOpName (Op);
873 NextOp = Op->Asl.Child;
878 NextOp = NextOp->Asl.Next;
881 if (Node->Value != ASL_EXTERNAL_METHOD &&
882 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL)
885 * Check the parsed arguments with the number expected by the
886 * method declaration itself
888 if (PassedArgs != Node->Value)
890 sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName,
893 if (PassedArgs < Node->Value)
895 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer);
899 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer);
905 /* 4) Check for an ASL Field definition */
907 else if ((Op->Asl.Parent) &&
908 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) ||
909 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD)))
912 * Offset checking for fields. If the parent operation region has a
913 * constant length (known at compile time), we can check fields
914 * defined in that region against the region length. This will catch
915 * fields and field units that cannot possibly fit within the region.
917 * Note: Index fields do not directly reference an operation region,
918 * thus they are not included in this check.
920 if (Op == Op->Asl.Parent->Asl.Child)
923 * This is the first child of the field node, which is
924 * the name of the region. Get the parse node for the
925 * region -- which contains the length of the region.
928 Op->Asl.Parent->Asl.ExtraValue =
929 ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer);
931 /* Examine the field access width */
933 switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer)
935 case AML_FIELD_ACCESS_ANY:
936 case AML_FIELD_ACCESS_BYTE:
937 case AML_FIELD_ACCESS_BUFFER:
943 case AML_FIELD_ACCESS_WORD:
948 case AML_FIELD_ACCESS_DWORD:
953 case AML_FIELD_ACCESS_QWORD:
960 * Is the region at least as big as the access width?
961 * Note: DataTableRegions have 0 length
963 if (((UINT32) OwningOp->Asl.Value.Integer) &&
964 ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength))
966 AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL);
970 * Check EC/CMOS/SMBUS fields to make sure that the correct
971 * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS)
973 SpaceIdOp = OwningOp->Asl.Child->Asl.Next;
974 switch ((UINT32) SpaceIdOp->Asl.Value.Integer)
976 case ACPI_ADR_SPACE_EC:
977 case ACPI_ADR_SPACE_CMOS:
978 case ACPI_ADR_SPACE_GPIO:
980 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer !=
981 AML_FIELD_ACCESS_BYTE)
983 AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL);
987 case ACPI_ADR_SPACE_SMBUS:
988 case ACPI_ADR_SPACE_IPMI:
989 case ACPI_ADR_SPACE_GSBUS:
991 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer !=
992 AML_FIELD_ACCESS_BUFFER)
994 AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL);
1000 /* Nothing to do for other address spaces */
1008 * This is one element of the field list. Check to make sure
1009 * that it does not go beyond the end of the parent operation region.
1011 * In the code below:
1012 * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits)
1013 * Op->Asl.ExtraValue - Field start offset (bits)
1014 * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits)
1015 * Op->Asl.Child->Asl.ExtraValue - Field access width (bits)
1017 if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child)
1019 XfCheckFieldRange (Op,
1020 Op->Asl.Parent->Asl.ExtraValue,
1022 (UINT32) Op->Asl.Child->Asl.Value.Integer,
1023 Op->Asl.Child->Asl.ExtraValue);
1028 /* 5) Check for a connection object */
1030 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION)
1032 return_ACPI_STATUS (Status);
1036 Op->Asl.Node = Node;
1037 return_ACPI_STATUS (Status);
1041 /*******************************************************************************
1043 * FUNCTION: XfNamespaceLocateEnd
1045 * PARAMETERS: ASL_WALK_CALLBACK
1049 * DESCRIPTION: Ascending callback used during cross reference. We only
1050 * need to worry about scope management here.
1052 ******************************************************************************/
1055 XfNamespaceLocateEnd (
1056 ACPI_PARSE_OBJECT *Op,
1060 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context;
1061 const ACPI_OPCODE_INFO *OpInfo;
1064 ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd);
1067 /* We are only interested in opcodes that have an associated name */
1069 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
1070 if (!(OpInfo->Flags & AML_NAMED))
1072 return_ACPI_STATUS (AE_OK);
1075 /* Not interested in name references, we did not open a scope for them */
1077 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
1078 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
1079 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
1081 return_ACPI_STATUS (AE_OK);
1084 /* Pop the scope stack if necessary */
1086 if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode)))
1089 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
1090 "%s: Popping scope for Op %p\n",
1091 AcpiUtGetTypeName (OpInfo->ObjectType), Op));
1093 (void) AcpiDsScopeStackPop (WalkState);
1096 return_ACPI_STATUS (AE_OK);
1100 #ifdef __UNDER_DEVELOPMENT
1101 /*******************************************************************************
1103 * FUNCTION: XfIsObjectParental
1105 * PARAMETERS: ChildOp - Op to be checked
1106 * PossibleParentOp - Determine if this op is in the family
1108 * RETURN: TRUE if ChildOp is a descendent of PossibleParentOp
1110 * DESCRIPTION: Determine if an Op is a descendent of another Op. Used to
1111 * detect if a method is declared within another method.
1113 ******************************************************************************/
1116 XfIsObjectParental (
1117 ACPI_PARSE_OBJECT *ChildOp,
1118 ACPI_PARSE_OBJECT *PossibleParentOp)
1120 ACPI_PARSE_OBJECT *ParentOp;
1123 /* Search upwards through the tree for possible parent */
1128 if (ParentOp == PossibleParentOp)
1133 ParentOp = ParentOp->Asl.Parent;
1140 /*******************************************************************************
1142 * FUNCTION: XfGetParentMethod
1144 * PARAMETERS: Op - Op to be checked
1146 * RETURN: Op for parent method. NULL if object is not within a method.
1148 * DESCRIPTION: Determine if an object is within a control method. Used to
1149 * implement special rules for named references from within a
1152 * NOTE: It would be better to have the parser set a flag in the Op if possible.
1154 ******************************************************************************/
1156 static ACPI_PARSE_OBJECT *
1158 ACPI_PARSE_OBJECT *Op)
1160 ACPI_PARSE_OBJECT *ParentOp;
1168 if (Op->Asl.ParseOpcode == PARSEOP_METHOD)
1173 /* Walk upwards through the parse tree, up to the root if necessary */
1178 if (ParentOp->Asl.ParseOpcode == PARSEOP_METHOD)
1183 ParentOp = ParentOp->Asl.Parent;
1186 /* Object is not within a method */
1192 /*******************************************************************************
1194 * FUNCTION: XfCheckIllegalReference
1196 * PARAMETERS: Op - Op referring to the target
1197 * TargetNode - Target of the reference
1199 * RETURN: None. Emits error message for an illegal reference
1201 * DESCRIPTION: Determine if a named reference is legal. A "named" reference
1202 * is something like: Store(ABCD, ...), where ABCD is an AML
1203 * Nameseg or Namepath.
1205 * NOTE: Caller must ensure that the name Op is in fact a reference, and not
1206 * an actual name declaration (creation of a named object).
1208 ******************************************************************************/
1211 XfCheckIllegalReference (
1212 ACPI_PARSE_OBJECT *Op,
1213 ACPI_NAMESPACE_NODE *TargetNode)
1215 ACPI_PARSE_OBJECT *MethodOp1;
1216 ACPI_PARSE_OBJECT *MethodOp2;
1217 ACPI_PARSE_OBJECT *TargetOp;
1221 * Check for an illegal reference to a named object:
1223 * 1) References from one control method to another, non-parent
1224 * method are not allowed, they will fail at runtime.
1226 * 2) Forward references within a control method are not allowed.
1227 * AML interpreters use a one-pass parse of control methods
1228 * so these forward references will fail at runtime.
1230 TargetOp = TargetNode->Op;
1232 MethodOp1 = XfGetParentMethod (Op);
1233 MethodOp2 = XfGetParentMethod (TargetOp);
1235 /* Are both objects within control method(s)? */
1237 if (!MethodOp1 || !MethodOp2)
1242 /* Objects not in the same method? */
1244 if (MethodOp1 != MethodOp2)
1247 * 1) Cross-method named reference
1249 * This is OK if and only if the target reference is within in a
1250 * method that is a parent of current method
1252 if (!XfIsObjectParental (MethodOp1, MethodOp2))
1254 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_METHOD_REF, Op,
1255 Op->Asl.ExternalName);
1260 * 2) Both reference and target are in the same method. Check if this is
1261 * an (illegal) forward reference by examining the exact source code
1262 * location of each (the referenced object and the object declaration).
1263 * This is a bit nasty, yet effective.
1265 else if (Op->Asl.LogicalByteOffset < TargetOp->Asl.LogicalByteOffset)
1267 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op,
1268 Op->Asl.ExternalName);