/****************************************************************************** * * Module Name: aslxref - Namespace cross-reference * *****************************************************************************/ /* * Copyright (C) 2000 - 2015, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include #include "aslcompiler.y.h" #include #include #include #include #define _COMPONENT ACPI_COMPILER ACPI_MODULE_NAME ("aslxref") /* Local prototypes */ static ACPI_STATUS XfNamespaceLocateBegin ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context); static ACPI_STATUS XfNamespaceLocateEnd ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context); static BOOLEAN XfObjectExists ( char *Name); static ACPI_STATUS XfCompareOneNamespaceObject ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue); static void XfCheckFieldRange ( ACPI_PARSE_OBJECT *Op, UINT32 RegionBitLength, UINT32 FieldBitOffset, UINT32 FieldBitLength, UINT32 AccessBitWidth); #ifdef __UNDER_DEVELOPMENT static ACPI_PARSE_OBJECT * XfGetParentMethod ( ACPI_PARSE_OBJECT *Op); static void XfCheckIllegalReference ( ACPI_PARSE_OBJECT *Op, ACPI_NAMESPACE_NODE *Node); static BOOLEAN XfIsObjectParental ( ACPI_PARSE_OBJECT *MethodOp1, ACPI_PARSE_OBJECT *MethodOp2); #endif /******************************************************************************* * * FUNCTION: XfCrossReferenceNamespace * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Perform a cross reference check of the parse tree against the * namespace. Every named referenced within the parse tree * should be get resolved with a namespace lookup. If not, the * original reference in the ASL code is invalid -- i.e., refers * to a non-existent object. * * NOTE: The ASL "External" operator causes the name to be inserted into the * namespace so that references to the external name will be resolved * correctly here. * ******************************************************************************/ ACPI_STATUS XfCrossReferenceNamespace ( void) { ACPI_WALK_STATE *WalkState; DbgPrint (ASL_DEBUG_OUTPUT, "\nCross referencing namespace\n\n"); /* * Create a new walk state for use when looking up names * within the namespace (Passed as context to the callbacks) */ WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); if (!WalkState) { return (AE_NO_MEMORY); } /* Walk the entire parse tree */ TrWalkParseTree (RootNode, ASL_WALK_VISIT_TWICE, XfNamespaceLocateBegin, XfNamespaceLocateEnd, WalkState); ACPI_FREE (WalkState); return (AE_OK); } /******************************************************************************* * * FUNCTION: XfObjectExists * * PARAMETERS: Name - 4 char ACPI name * * RETURN: TRUE if name exists in namespace * * DESCRIPTION: Walk the namespace to find an object * ******************************************************************************/ static BOOLEAN XfObjectExists ( char *Name) { ACPI_STATUS Status; /* Walk entire namespace from the supplied root */ Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, FALSE, XfCompareOneNamespaceObject, NULL, Name, NULL); if (Status == AE_CTRL_TRUE) { /* At least one instance of the name was found */ return (TRUE); } return (FALSE); } /******************************************************************************* * * FUNCTION: XfCompareOneNamespaceObject * * PARAMETERS: ACPI_WALK_CALLBACK * * RETURN: Status * * DESCRIPTION: Compare name of one object. * ******************************************************************************/ static ACPI_STATUS XfCompareOneNamespaceObject ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue) { ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; /* Simply check the name */ if (*((UINT32 *) (Context)) == Node->Name.Integer) { /* Abort walk if we found one instance */ return (AE_CTRL_TRUE); } return (AE_OK); } /******************************************************************************* * * FUNCTION: XfCheckFieldRange * * PARAMETERS: RegionBitLength - Length of entire parent region * FieldBitOffset - Start of the field unit (within region) * FieldBitLength - Entire length of field unit * AccessBitWidth - Access width of the field unit * * RETURN: None * * DESCRIPTION: Check one field unit to make sure it fits in the parent * op region. * * Note: AccessBitWidth must be either 8,16,32, or 64 * ******************************************************************************/ static void XfCheckFieldRange ( ACPI_PARSE_OBJECT *Op, UINT32 RegionBitLength, UINT32 FieldBitOffset, UINT32 FieldBitLength, UINT32 AccessBitWidth) { UINT32 FieldEndBitOffset; /* * Check each field unit against the region size. The entire * field unit (start offset plus length) must fit within the * region. */ FieldEndBitOffset = FieldBitOffset + FieldBitLength; if (FieldEndBitOffset > RegionBitLength) { /* Field definition itself is beyond the end-of-region */ AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL); return; } /* * Now check that the field plus AccessWidth doesn't go beyond * the end-of-region. Assumes AccessBitWidth is a power of 2 */ FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth); if (FieldEndBitOffset > RegionBitLength) { /* Field definition combined with the access is beyond EOR */ AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL); } } #ifdef __UNDER_DEVELOPMENT /******************************************************************************* * * FUNCTION: XfIsObjectParental * * PARAMETERS: ChildOp - Op to be checked * PossibleParentOp - Determine if this op is in the family * * RETURN: TRUE if ChildOp is a descendent of PossibleParentOp * * DESCRIPTION: Determine if an Op is a descendent of another Op. Used to * detect if a method is declared within another method. * ******************************************************************************/ static BOOLEAN XfIsObjectParental ( ACPI_PARSE_OBJECT *ChildOp, ACPI_PARSE_OBJECT *PossibleParentOp) { ACPI_PARSE_OBJECT *ParentOp; /* Search upwards through the tree for possible parent */ ParentOp = ChildOp; while (ParentOp) { if (ParentOp == PossibleParentOp) { return (TRUE); } ParentOp = ParentOp->Asl.Parent; } return (FALSE); } /******************************************************************************* * * FUNCTION: XfGetParentMethod * * PARAMETERS: Op - Op to be checked * * RETURN: Op for parent method. NULL if object is not within a method. * * DESCRIPTION: Determine if an object is within a control method. Used to * implement special rules for named references from within a * control method. * * NOTE: It would be better to have the parser set a flag in the Op if possible. * ******************************************************************************/ static ACPI_PARSE_OBJECT * XfGetParentMethod ( ACPI_PARSE_OBJECT *Op) { ACPI_PARSE_OBJECT *ParentOp; if (!Op) { return (NULL); } if (Op->Asl.ParseOpcode == PARSEOP_METHOD) { return (NULL); } /* Walk upwards through the parse tree, up to the root if necessary */ ParentOp = Op; while (ParentOp) { if (ParentOp->Asl.ParseOpcode == PARSEOP_METHOD) { return (ParentOp); } ParentOp = ParentOp->Asl.Parent; } /* Object is not within a method */ return (NULL); } /******************************************************************************* * * FUNCTION: XfCheckIllegalReference * * PARAMETERS: Op - Op referring to the target * TargetNode - Target of the reference * * RETURN: None. Emits error message for an illegal reference * * DESCRIPTION: Determine if a named reference is legal. A "named" reference * is something like: Store(ABCD, ...), where ABCD is an AML * Nameseg or Namepath. * * NOTE: Caller must ensure that the name Op is in fact a reference, and not * an actual name declaration (creation of a named object). * ******************************************************************************/ static void XfCheckIllegalReference ( ACPI_PARSE_OBJECT *Op, ACPI_NAMESPACE_NODE *TargetNode) { ACPI_PARSE_OBJECT *MethodOp1; ACPI_PARSE_OBJECT *MethodOp2; ACPI_PARSE_OBJECT *TargetOp; /* * Check for an illegal reference to a named object: * * 1) References from one control method to another, non-parent * method are not allowed, they will fail at runtime. * * 2) Forward references within a control method are not allowed. * AML interpreters use a one-pass parse of control methods * so these forward references will fail at runtime. */ TargetOp = TargetNode->Op; MethodOp1 = XfGetParentMethod (Op); MethodOp2 = XfGetParentMethod (TargetOp); /* Are both objects within control method(s)? */ if (!MethodOp1 || !MethodOp2) { return; } /* Objects not in the same method? */ if (MethodOp1 != MethodOp2) { /* * 1) Cross-method named reference * * This is OK if and only if the target reference is within in a * method that is a parent of current method */ if (!XfIsObjectParental (MethodOp1, MethodOp2)) { AslError (ASL_ERROR, ASL_MSG_ILLEGAL_METHOD_REF, Op, Op->Asl.ExternalName); } } /* * 2) Both reference and target are in the same method. Check if this is * an (illegal) forward reference by examining the exact source code * location of each (the referenced object and the object declaration). * This is a bit nasty, yet effective. */ else if (Op->Asl.LogicalByteOffset < TargetOp->Asl.LogicalByteOffset) { AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op, Op->Asl.ExternalName); } } #endif /******************************************************************************* * * FUNCTION: XfNamespaceLocateBegin * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: Status * * DESCRIPTION: Descending callback used during cross-reference. For named * object references, attempt to locate the name in the * namespace. * * NOTE: ASL references to named fields within resource descriptors are * resolved to integer values here. Therefore, this step is an * important part of the code generation. We don't know that the * name refers to a resource descriptor until now. * ******************************************************************************/ static ACPI_STATUS XfNamespaceLocateBegin ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; ACPI_NAMESPACE_NODE *Node; ACPI_STATUS Status; ACPI_OBJECT_TYPE ObjectType; char *Path; UINT8 PassedArgs; ACPI_PARSE_OBJECT *NextOp; ACPI_PARSE_OBJECT *OwningOp; ACPI_PARSE_OBJECT *SpaceIdOp; UINT32 MinimumLength; UINT32 Offset; UINT32 FieldBitLength; UINT32 TagBitLength; UINT8 Message = 0; const ACPI_OPCODE_INFO *OpInfo; UINT32 Flags; ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op); /* * If this node is the actual declaration of a name * [such as the XXXX name in "Method (XXXX)"], * we are not interested in it here. We only care about names that are * references to other objects within the namespace and the parent objects * of name declarations */ if (Op->Asl.CompileFlags & NODE_IS_NAME_DECLARATION) { return_ACPI_STATUS (AE_OK); } /* We are only interested in opcodes that have an associated name */ OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); if ((!(OpInfo->Flags & AML_NAMED)) && (!(OpInfo->Flags & AML_CREATE)) && (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) && (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) && (Op->Asl.ParseOpcode != PARSEOP_METHODCALL)) { return_ACPI_STATUS (AE_OK); } /* * One special case: CondRefOf operator - we don't care if the name exists * or not at this point, just ignore it, the point of the operator is to * determine if the name exists at runtime. */ if ((Op->Asl.Parent) && (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) { return_ACPI_STATUS (AE_OK); } /* * We must enable the "search-to-root" for single NameSegs, but * we have to be very careful about opening up scopes */ Flags = ACPI_NS_SEARCH_PARENT; if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) { /* * These are name references, do not push the scope stack * for them. */ Flags |= ACPI_NS_DONT_OPEN_SCOPE; } /* Get the NamePath from the appropriate place */ if (OpInfo->Flags & AML_NAMED) { /* For nearly all NAMED operators, the name reference is the first child */ Path = Op->Asl.Child->Asl.Value.String; if (Op->Asl.AmlOpcode == AML_ALIAS_OP) { /* * ALIAS is the only oddball opcode, the name declaration * (alias name) is the second operand */ Path = Op->Asl.Child->Asl.Next->Asl.Value.String; } } else if (OpInfo->Flags & AML_CREATE) { /* Name must appear as the last parameter */ NextOp = Op->Asl.Child; while (!(NextOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)) { NextOp = NextOp->Asl.Next; } Path = NextOp->Asl.Value.String; } else { Path = Op->Asl.Value.String; } ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Type=%s\n", AcpiUtGetTypeName (ObjectType))); /* * Lookup the name in the namespace. Name must exist at this point, or it * is an invalid reference. * * The namespace is also used as a lookup table for references to resource * descriptors and the fields within them. */ Gbl_NsLookupCount++; Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node)); if (ACPI_FAILURE (Status)) { if (Status == AE_NOT_FOUND) { /* * We didn't find the name reference by path -- we can qualify this * a little better before we print an error message */ if (strlen (Path) == ACPI_NAME_SIZE) { /* A simple, one-segment ACPI name */ if (XfObjectExists (Path)) { /* * There exists such a name, but we couldn't get to it * from this scope */ AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op, Op->Asl.ExternalName); } else { /* The name doesn't exist, period */ AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, Op->Asl.ExternalName); } } else { /* Check for a fully qualified path */ if (Path[0] == AML_ROOT_PREFIX) { /* Gave full path, the object does not exist */ AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, Op->Asl.ExternalName); } else { /* * We can't tell whether it doesn't exist or just * can't be reached. */ AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, Op->Asl.ExternalName); } } Status = AE_OK; } return_ACPI_STATUS (Status); } /* Check for a reference vs. name declaration */ if (!(OpInfo->Flags & AML_NAMED) && !(OpInfo->Flags & AML_CREATE)) { /* This node has been referenced, mark it for reference check */ Node->Flags |= ANOBJ_IS_REFERENCED; #ifdef __UNDER_DEVELOPMENT /* Check for an illegal reference */ XfCheckIllegalReference (Op, Node); #endif } /* Attempt to optimize the NamePath */ OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node); /* * 1) Dereference an alias (A name reference that is an alias) * Aliases are not nested, the alias always points to the final object */ if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) && (Node->Type == ACPI_TYPE_LOCAL_ALIAS)) { /* This node points back to the original PARSEOP_ALIAS */ NextOp = Node->Op; /* The first child is the alias target op */ NextOp = NextOp->Asl.Child; /* That in turn points back to original target alias node */ if (NextOp->Asl.Node) { Node = NextOp->Asl.Node; } /* Else - forward reference to alias, will be resolved later */ } /* 2) Check for a reference to a resource descriptor */ if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || (Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) { /* * This was a reference to a field within a resource descriptor. * Extract the associated field offset (either a bit or byte * offset depending on the field type) and change the named * reference into an integer for AML code generation */ Offset = Node->Value; TagBitLength = Node->Length; /* * If a field is being created, generate the length (in bits) of * the field. Note: Opcodes other than CreateXxxField and Index * can come through here. For other opcodes, we just need to * convert the resource tag reference to an integer offset. */ switch (Op->Asl.Parent->Asl.AmlOpcode) { case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */ /* * We know the length operand is an integer constant because * we know that it contains a reference to a resource * descriptor tag. */ FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer; break; case AML_CREATE_BIT_FIELD_OP: FieldBitLength = 1; break; case AML_CREATE_BYTE_FIELD_OP: case AML_INDEX_OP: FieldBitLength = 8; break; case AML_CREATE_WORD_FIELD_OP: FieldBitLength = 16; break; case AML_CREATE_DWORD_FIELD_OP: FieldBitLength = 32; break; case AML_CREATE_QWORD_FIELD_OP: FieldBitLength = 64; break; default: FieldBitLength = 0; break; } /* Check the field length against the length of the resource tag */ if (FieldBitLength) { if (TagBitLength < FieldBitLength) { Message = ASL_MSG_TAG_SMALLER; } else if (TagBitLength > FieldBitLength) { Message = ASL_MSG_TAG_LARGER; } if (Message) { sprintf (MsgBuffer, "Size mismatch, Tag: %u bit%s, Field: %u bit%s", TagBitLength, (TagBitLength > 1) ? "s" : "", FieldBitLength, (FieldBitLength > 1) ? "s" : ""); AslError (ASL_WARNING, Message, Op, MsgBuffer); } } /* Convert the BitOffset to a ByteOffset for certain opcodes */ switch (Op->Asl.Parent->Asl.AmlOpcode) { case AML_CREATE_BYTE_FIELD_OP: case AML_CREATE_WORD_FIELD_OP: case AML_CREATE_DWORD_FIELD_OP: case AML_CREATE_QWORD_FIELD_OP: case AML_INDEX_OP: Offset = ACPI_DIV_8 (Offset); break; default: break; } /* Now convert this node to an integer whose value is the field offset */ Op->Asl.AmlLength = 0; Op->Asl.ParseOpcode = PARSEOP_INTEGER; Op->Asl.Value.Integer = (UINT64) Offset; Op->Asl.CompileFlags |= NODE_IS_RESOURCE_FIELD; OpcGenerateAmlOpcode (Op); } /* 3) Check for a method invocation */ else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) && (Node->Type == ACPI_TYPE_METHOD) && (Op->Asl.Parent) && (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) || (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) { /* * A reference to a method within one of these opcodes is not an * invocation of the method, it is simply a reference to the method. */ if ((Op->Asl.Parent) && ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_DEREFOF) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)|| (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE))) { return_ACPI_STATUS (AE_OK); } /* * There are two types of method invocation: * 1) Invocation with arguments -- the parser recognizes this * as a METHODCALL. * 2) Invocation with no arguments --the parser cannot determine that * this is a method invocation, therefore we have to figure it out * here. */ if (Node->Type != ACPI_TYPE_METHOD) { sprintf (MsgBuffer, "%s is a %s", Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer); return_ACPI_STATUS (AE_OK); } /* Save the method node in the caller's op */ Op->Asl.Node = Node; if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF) { return_ACPI_STATUS (AE_OK); } /* * This is a method invocation, with or without arguments. * Count the number of arguments, each appears as a child * under the parent node */ Op->Asl.ParseOpcode = PARSEOP_METHODCALL; UtSetParseOpName (Op); PassedArgs = 0; NextOp = Op->Asl.Child; while (NextOp) { PassedArgs++; NextOp = NextOp->Asl.Next; } if (Node->Value != ASL_EXTERNAL_METHOD) { /* * Check the parsed arguments with the number expected by the * method declaration itself */ if (PassedArgs != Node->Value) { sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, Node->Value); if (PassedArgs < Node->Value) { AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer); } else { AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer); } } } } /* 4) Check for an ASL Field definition */ else if ((Op->Asl.Parent) && ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD))) { /* * Offset checking for fields. If the parent operation region has a * constant length (known at compile time), we can check fields * defined in that region against the region length. This will catch * fields and field units that cannot possibly fit within the region. * * Note: Index fields do not directly reference an operation region, * thus they are not included in this check. */ if (Op == Op->Asl.Parent->Asl.Child) { /* * This is the first child of the field node, which is * the name of the region. Get the parse node for the * region -- which contains the length of the region. */ OwningOp = Node->Op; Op->Asl.Parent->Asl.ExtraValue = ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer); /* Examine the field access width */ switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer) { case AML_FIELD_ACCESS_ANY: case AML_FIELD_ACCESS_BYTE: case AML_FIELD_ACCESS_BUFFER: default: MinimumLength = 1; break; case AML_FIELD_ACCESS_WORD: MinimumLength = 2; break; case AML_FIELD_ACCESS_DWORD: MinimumLength = 4; break; case AML_FIELD_ACCESS_QWORD: MinimumLength = 8; break; } /* * Is the region at least as big as the access width? * Note: DataTableRegions have 0 length */ if (((UINT32) OwningOp->Asl.Value.Integer) && ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength)) { AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL); } /* * Check EC/CMOS/SMBUS fields to make sure that the correct * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS) */ SpaceIdOp = OwningOp->Asl.Child->Asl.Next; switch ((UINT32) SpaceIdOp->Asl.Value.Integer) { case ACPI_ADR_SPACE_EC: case ACPI_ADR_SPACE_CMOS: case ACPI_ADR_SPACE_GPIO: if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BYTE) { AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL); } break; case ACPI_ADR_SPACE_SMBUS: case ACPI_ADR_SPACE_IPMI: case ACPI_ADR_SPACE_GSBUS: if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BUFFER) { AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL); } break; default: /* Nothing to do for other address spaces */ break; } } else { /* * This is one element of the field list. Check to make sure * that it does not go beyond the end of the parent operation region. * * In the code below: * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits) * Op->Asl.ExtraValue - Field start offset (bits) * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits) * Op->Asl.Child->Asl.ExtraValue - Field access width (bits) */ if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child) { XfCheckFieldRange (Op, Op->Asl.Parent->Asl.ExtraValue, Op->Asl.ExtraValue, (UINT32) Op->Asl.Child->Asl.Value.Integer, Op->Asl.Child->Asl.ExtraValue); } } } /* 5) Check for a connection object */ #if 0 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION) { return_ACPI_STATUS (Status); } #endif Op->Asl.Node = Node; return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: XfNamespaceLocateEnd * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: Status * * DESCRIPTION: Ascending callback used during cross reference. We only * need to worry about scope management here. * ******************************************************************************/ static ACPI_STATUS XfNamespaceLocateEnd ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; const ACPI_OPCODE_INFO *OpInfo; ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd); /* We are only interested in opcodes that have an associated name */ OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); if (!(OpInfo->Flags & AML_NAMED)) { return_ACPI_STATUS (AE_OK); } /* Not interested in name references, we did not open a scope for them */ if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) { return_ACPI_STATUS (AE_OK); } /* Pop the scope stack if necessary */ if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode))) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "%s: Popping scope for Op %p\n", AcpiUtGetTypeName (OpInfo->ObjectType), Op)); (void) AcpiDsScopeStackPop (WalkState); } return_ACPI_STATUS (AE_OK); }