Import ACPICA 20120215.

1 files changed, 1237 insertions, 0 deletions

diff --git a/source/compiler/aslwalks.c b/source/compiler/aslwalks.c
new file mode 100644
index 0000000..d98806c
--- /dev/null
+++ b/source/compiler/aslwalks.c
@@ -0,0 +1,1237 @@
+/******************************************************************************
+ *
+ * Module Name: aslwalks.c - major analytical parse tree walks
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, 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 "aslcompiler.h"
+#include "aslcompiler.y.h"
+#include "acparser.h"
+#include "amlcode.h"
+
+
+#define _COMPONENT          ACPI_COMPILER
+        ACPI_MODULE_NAME    ("aslwalks")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AnMethodAnalysisWalkBegin
+ *
+ * PARAMETERS:  ASL_WALK_CALLBACK
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Descending callback for the analysis walk. Check methods for:
+ *              1) Initialized local variables
+ *              2) Valid arguments
+ *              3) Return types
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AnMethodAnalysisWalkBegin (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  Level,
+    void                    *Context)
+{
+    ASL_ANALYSIS_WALK_INFO  *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;
+    ASL_METHOD_INFO         *MethodInfo = WalkInfo->MethodStack;
+    ACPI_PARSE_OBJECT       *Next;
+    UINT32                  RegisterNumber;
+    UINT32                  i;
+    char                    LocalName[] = "Local0";
+    char                    ArgName[] = "Arg0";
+    ACPI_PARSE_OBJECT       *ArgNode;
+    ACPI_PARSE_OBJECT       *NextType;
+    ACPI_PARSE_OBJECT       *NextParamType;
+    UINT8                   ActualArgs = 0;
+
+
+    switch (Op->Asl.ParseOpcode)
+    {
+    case PARSEOP_METHOD:
+
+        TotalMethods++;
+
+        /* Create and init method info */
+
+        MethodInfo       = UtLocalCalloc (sizeof (ASL_METHOD_INFO));
+        MethodInfo->Next = WalkInfo->MethodStack;
+        MethodInfo->Op = Op;
+
+        WalkInfo->MethodStack = MethodInfo;
+
+        /* Get the name node, ignored here */
+
+        Next = Op->Asl.Child;
+
+        /* Get the NumArguments node */
+
+        Next = Next->Asl.Next;
+        MethodInfo->NumArguments = (UINT8)
+            (((UINT8) Next->Asl.Value.Integer) & 0x07);
+
+        /* Get the SerializeRule and SyncLevel nodes, ignored here */
+
+        Next = Next->Asl.Next;
+        Next = Next->Asl.Next;
+        ArgNode = Next;
+
+        /* Get the ReturnType node */
+
+        Next = Next->Asl.Next;
+
+        NextType = Next->Asl.Child;
+        while (NextType)
+        {
+            /* Get and map each of the ReturnTypes */
+
+            MethodInfo->ValidReturnTypes |= AnMapObjTypeToBtype (NextType);
+            NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
+            NextType = NextType->Asl.Next;
+        }
+
+        /* Get the ParameterType node */
+
+        Next = Next->Asl.Next;
+
+        NextType = Next->Asl.Child;
+        while (NextType)
+        {
+            if (NextType->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)
+            {
+                NextParamType = NextType->Asl.Child;
+                while (NextParamType)
+                {
+                    MethodInfo->ValidArgTypes[ActualArgs] |= AnMapObjTypeToBtype (NextParamType);
+                    NextParamType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
+                    NextParamType = NextParamType->Asl.Next;
+                }
+            }
+            else
+            {
+                MethodInfo->ValidArgTypes[ActualArgs] =
+                    AnMapObjTypeToBtype (NextType);
+                NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
+                ActualArgs++;
+            }
+
+            NextType = NextType->Asl.Next;
+        }
+
+        if ((MethodInfo->NumArguments) &&
+            (MethodInfo->NumArguments != ActualArgs))
+        {
+            /* error: Param list did not match number of args */
+        }
+
+        /* Allow numarguments == 0 for Function() */
+
+        if ((!MethodInfo->NumArguments) && (ActualArgs))
+        {
+            MethodInfo->NumArguments = ActualArgs;
+            ArgNode->Asl.Value.Integer |= ActualArgs;
+        }
+
+        /*
+         * Actual arguments are initialized at method entry.
+         * All other ArgX "registers" can be used as locals, so we
+         * track their initialization.
+         */
+        for (i = 0; i < MethodInfo->NumArguments; i++)
+        {
+            MethodInfo->ArgInitialized[i] = TRUE;
+        }
+        break;
+
+
+    case PARSEOP_METHODCALL:
+
+        if (MethodInfo &&
+           (Op->Asl.Node == MethodInfo->Op->Asl.Node))
+        {
+            AslError (ASL_REMARK, ASL_MSG_RECURSION, Op, Op->Asl.ExternalName);
+        }
+        break;
+
+
+    case PARSEOP_LOCAL0:
+    case PARSEOP_LOCAL1:
+    case PARSEOP_LOCAL2:
+    case PARSEOP_LOCAL3:
+    case PARSEOP_LOCAL4:
+    case PARSEOP_LOCAL5:
+    case PARSEOP_LOCAL6:
+    case PARSEOP_LOCAL7:
+
+        if (!MethodInfo)
+        {
+            /*
+             * Local was used outside a control method, or there was an error
+             * in the method declaration.
+             */
+            AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName);
+            return (AE_ERROR);
+        }
+
+        RegisterNumber = (Op->Asl.AmlOpcode & 0x000F);
+
+        /*
+         * If the local is being used as a target, mark the local
+         * initialized
+         */
+        if (Op->Asl.CompileFlags & NODE_IS_TARGET)
+        {
+            MethodInfo->LocalInitialized[RegisterNumber] = TRUE;
+        }
+
+        /*
+         * Otherwise, this is a reference, check if the local
+         * has been previously initialized.
+         *
+         * The only operator that accepts an uninitialized value is ObjectType()
+         */
+        else if ((!MethodInfo->LocalInitialized[RegisterNumber]) &&
+                 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))
+        {
+            LocalName[strlen (LocalName) -1] = (char) (RegisterNumber + 0x30);
+            AslError (ASL_ERROR, ASL_MSG_LOCAL_INIT, Op, LocalName);
+        }
+        break;
+
+
+    case PARSEOP_ARG0:
+    case PARSEOP_ARG1:
+    case PARSEOP_ARG2:
+    case PARSEOP_ARG3:
+    case PARSEOP_ARG4:
+    case PARSEOP_ARG5:
+    case PARSEOP_ARG6:
+
+        if (!MethodInfo)
+        {
+            /*
+             * Arg was used outside a control method, or there was an error
+             * in the method declaration.
+             */
+            AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName);
+            return (AE_ERROR);
+        }
+
+        RegisterNumber = (Op->Asl.AmlOpcode & 0x000F) - 8;
+        ArgName[strlen (ArgName) -1] = (char) (RegisterNumber + 0x30);
+
+        /*
+         * If the Arg is being used as a target, mark the local
+         * initialized
+         */
+        if (Op->Asl.CompileFlags & NODE_IS_TARGET)
+        {
+            MethodInfo->ArgInitialized[RegisterNumber] = TRUE;
+        }
+
+        /*
+         * Otherwise, this is a reference, check if the Arg
+         * has been previously initialized.
+         *
+         * The only operator that accepts an uninitialized value is ObjectType()
+         */
+        else if ((!MethodInfo->ArgInitialized[RegisterNumber]) &&
+                 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))
+        {
+            AslError (ASL_ERROR, ASL_MSG_ARG_INIT, Op, ArgName);
+        }
+
+        /* Flag this arg if it is not a "real" argument to the method */
+
+        if (RegisterNumber >= MethodInfo->NumArguments)
+        {
+            AslError (ASL_REMARK, ASL_MSG_NOT_PARAMETER, Op, ArgName);
+        }
+        break;
+
+
+    case PARSEOP_RETURN:
+
+        if (!MethodInfo)
+        {
+            /*
+             * Probably was an error in the method declaration,
+             * no additional error here
+             */
+            ACPI_WARNING ((AE_INFO, "%p, No parent method", Op));
+            return (AE_ERROR);
+        }
+
+        /*
+         * A child indicates a possible return value. A simple Return or
+         * Return() is marked with NODE_IS_NULL_RETURN by the parser so
+         * that it is not counted as a "real" return-with-value, although
+         * the AML code that is actually emitted is Return(0). The AML
+         * definition of Return has a required parameter, so we are
+         * forced to convert a null return to Return(0).
+         */
+        if ((Op->Asl.Child) &&
+            (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG) &&
+            (!(Op->Asl.Child->Asl.CompileFlags & NODE_IS_NULL_RETURN)))
+        {
+            MethodInfo->NumReturnWithValue++;
+        }
+        else
+        {
+            MethodInfo->NumReturnNoValue++;
+        }
+        break;
+
+
+    case PARSEOP_BREAK:
+    case PARSEOP_CONTINUE:
+
+        Next = Op->Asl.Parent;
+        while (Next)
+        {
+            if (Next->Asl.ParseOpcode == PARSEOP_WHILE)
+            {
+                break;
+            }
+            Next = Next->Asl.Parent;
+        }
+
+        if (!Next)
+        {
+            AslError (ASL_ERROR, ASL_MSG_NO_WHILE, Op, NULL);
+        }
+        break;
+
+
+    case PARSEOP_STALL:
+
+        /* We can range check if the argument is an integer */
+
+        if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_INTEGER) &&
+            (Op->Asl.Child->Asl.Value.Integer > ACPI_UINT8_MAX))
+        {
+            AslError (ASL_ERROR, ASL_MSG_INVALID_TIME, Op, NULL);
+        }
+        break;
+
+
+    case PARSEOP_DEVICE:
+    case PARSEOP_EVENT:
+    case PARSEOP_MUTEX:
+    case PARSEOP_OPERATIONREGION:
+    case PARSEOP_POWERRESOURCE:
+    case PARSEOP_PROCESSOR:
+    case PARSEOP_THERMALZONE:
+
+        /*
+         * The first operand is a name to be created in the namespace.
+         * Check against the reserved list.
+         */
+        i = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
+        if (i < ACPI_VALID_RESERVED_NAME_MAX)
+        {
+            AslError (ASL_ERROR, ASL_MSG_RESERVED_USE, Op, Op->Asl.ExternalName);
+        }
+        break;
+
+
+    case PARSEOP_NAME:
+
+        /* Typecheck any predefined names statically defined with Name() */
+
+        ApCheckForPredefinedObject (Op, Op->Asl.NameSeg);
+
+        /* Special typechecking for _HID */
+
+        if (!ACPI_STRCMP (METHOD_NAME__HID, Op->Asl.NameSeg))
+        {
+            Next = Op->Asl.Child->Asl.Next;
+            AnCheckId (Next, ASL_TYPE_HID);
+        }
+
+        /* Special typechecking for _CID */
+
+        else if (!ACPI_STRCMP (METHOD_NAME__CID, Op->Asl.NameSeg))
+        {
+            Next = Op->Asl.Child->Asl.Next;
+
+            if ((Next->Asl.ParseOpcode == PARSEOP_PACKAGE) ||
+                (Next->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE))
+            {
+                Next = Next->Asl.Child;
+                while (Next)
+                {
+                    AnCheckId (Next, ASL_TYPE_CID);
+                    Next = Next->Asl.Next;
+                }
+            }
+            else
+            {
+                AnCheckId (Next, ASL_TYPE_CID);
+            }
+        }
+        break;
+
+
+    default:
+        break;
+    }
+
+    return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AnMethodAnalysisWalkEnd
+ *
+ * PARAMETERS:  ASL_WALK_CALLBACK
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Ascending callback for analysis walk. Complete method
+ *              return analysis.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AnMethodAnalysisWalkEnd (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  Level,
+    void                    *Context)
+{
+    ASL_ANALYSIS_WALK_INFO  *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;
+    ASL_METHOD_INFO         *MethodInfo = WalkInfo->MethodStack;
+
+
+    switch (Op->Asl.ParseOpcode)
+    {
+    case PARSEOP_METHOD:
+    case PARSEOP_RETURN:
+        if (!MethodInfo)
+        {
+            printf ("No method info for method! [%s]\n", Op->Asl.Namepath);
+            AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,
+                "No method info for this method");
+
+            CmCleanupAndExit ();
+            return (AE_AML_INTERNAL);
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    switch (Op->Asl.ParseOpcode)
+    {
+    case PARSEOP_METHOD:
+
+        WalkInfo->MethodStack = MethodInfo->Next;
+
+        /*
+         * Check if there is no return statement at the end of the
+         * method AND we can actually get there -- i.e., the execution
+         * of the method can possibly terminate without a return statement.
+         */
+        if ((!AnLastStatementIsReturn (Op)) &&
+            (!(Op->Asl.CompileFlags & NODE_HAS_NO_EXIT)))
+        {
+            /*
+             * No return statement, and execution can possibly exit
+             * via this path. This is equivalent to Return ()
+             */
+            MethodInfo->NumReturnNoValue++;
+        }
+
+        /*
+         * Check for case where some return statements have a return value
+         * and some do not. Exit without a return statement is a return with
+         * no value
+         */
+        if (MethodInfo->NumReturnNoValue &&
+            MethodInfo->NumReturnWithValue)
+        {
+            AslError (ASL_WARNING, ASL_MSG_RETURN_TYPES, Op,
+                Op->Asl.ExternalName);
+        }
+
+        /*
+         * If there are any RETURN() statements with no value, or there is a
+         * control path that allows the method to exit without a return value,
+         * we mark the method as a method that does not return a value. This
+         * knowledge can be used to check method invocations that expect a
+         * returned value.
+         */
+        if (MethodInfo->NumReturnNoValue)
+        {
+            if (MethodInfo->NumReturnWithValue)
+            {
+                Op->Asl.CompileFlags |= NODE_METHOD_SOME_NO_RETVAL;
+            }
+            else
+            {
+                Op->Asl.CompileFlags |= NODE_METHOD_NO_RETVAL;
+            }
+        }
+
+        /*
+         * Check predefined method names for correct return behavior
+         * and correct number of arguments. Also, some special checks
+         * For GPE and _REG methods.
+         */
+        if (ApCheckForPredefinedMethod (Op, MethodInfo))
+        {
+            /* Special check for two names like _L01 and _E01 in same scope */
+
+            ApCheckForGpeNameConflict (Op);
+
+            /*
+             * Special check for _REG: Must have an operation region definition
+             * within the same scope!
+             */
+            ApCheckRegMethod (Op);
+        }
+
+        ACPI_FREE (MethodInfo);
+        break;
+
+
+    case PARSEOP_NAME:
+
+         /* Special check for two names like _L01 and _E01 in same scope */
+
+        ApCheckForGpeNameConflict (Op);
+        break;
+
+
+    case PARSEOP_RETURN:
+
+        /*
+         * If the parent is a predefined method name, attempt to typecheck
+         * the return value. Only static types can be validated.
+         */
+        ApCheckPredefinedReturnValue (Op, MethodInfo);
+
+        /*
+         * The parent block does not "exit" and continue execution -- the
+         * method is terminated here with the Return() statement.
+         */
+        Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;
+
+        /* Used in the "typing" pass later */
+
+        Op->Asl.ParentMethod = MethodInfo->Op;
+
+        /*
+         * If there is a peer node after the return statement, then this
+         * node is unreachable code -- i.e., it won't be executed because of
+         * the preceeding Return() statement.
+         */
+        if (Op->Asl.Next)
+        {
+            AslError (ASL_WARNING, ASL_MSG_UNREACHABLE_CODE, Op->Asl.Next, NULL);
+        }
+        break;
+
+
+    case PARSEOP_IF:
+
+        if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&
+            (Op->Asl.Next) &&
+            (Op->Asl.Next->Asl.ParseOpcode == PARSEOP_ELSE))
+        {
+            /*
+             * This IF has a corresponding ELSE. The IF block has no exit,
+             * (it contains an unconditional Return)
+             * mark the ELSE block to remember this fact.
+             */
+            Op->Asl.Next->Asl.CompileFlags |= NODE_IF_HAS_NO_EXIT;
+        }
+        break;
+
+
+    case PARSEOP_ELSE:
+
+        if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&
+            (Op->Asl.CompileFlags & NODE_IF_HAS_NO_EXIT))
+        {
+            /*
+             * This ELSE block has no exit and the corresponding IF block
+             * has no exit either. Therefore, the parent node has no exit.
+             */
+            Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;
+        }
+        break;
+
+
+    default:
+
+        if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&
+            (Op->Asl.Parent))
+        {
+            /* If this node has no exit, then the parent has no exit either */
+
+            Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;
+        }
+        break;
+    }
+
+    return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AnMethodTypingWalkEnd
+ *
+ * PARAMETERS:  ASL_WALK_CALLBACK
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Ascending callback for typing walk. Complete the method
+ *              return analysis. Check methods for:
+ *              1) Initialized local variables
+ *              2) Valid arguments
+ *              3) Return types
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AnMethodTypingWalkEnd (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  Level,
+    void                    *Context)
+{
+    UINT32                  ThisNodeBtype;
+
+
+    switch (Op->Asl.ParseOpcode)
+    {
+    case PARSEOP_METHOD:
+
+        Op->Asl.CompileFlags |= NODE_METHOD_TYPED;
+        break;
+
+    case PARSEOP_RETURN:
+
+        if ((Op->Asl.Child) &&
+            (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
+        {
+            ThisNodeBtype = AnGetBtype (Op->Asl.Child);
+
+            if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) &&
+                (ThisNodeBtype == (ACPI_UINT32_MAX -1)))
+            {
+                /*
+                 * The called method is untyped at this time (typically a
+                 * forward reference).
+                 *
+                 * Check for a recursive method call first.
+                 */
+                if (Op->Asl.ParentMethod != Op->Asl.Child->Asl.Node->Op)
+                {
+                    /* We must type the method here */
+
+                    TrWalkParseTree (Op->Asl.Child->Asl.Node->Op,
+                        ASL_WALK_VISIT_UPWARD, NULL,
+                        AnMethodTypingWalkEnd, NULL);
+
+                    ThisNodeBtype = AnGetBtype (Op->Asl.Child);
+                }
+            }
+
+            /* Returns a value, save the value type */
+
+            if (Op->Asl.ParentMethod)
+            {
+                Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisNodeBtype;
+            }
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AnOperandTypecheckWalkEnd
+ *
+ * PARAMETERS:  ASL_WALK_CALLBACK
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Ascending callback for analysis walk. Complete method
+ *              return analysis.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AnOperandTypecheckWalkEnd (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  Level,
+    void                    *Context)
+{
+    const ACPI_OPCODE_INFO  *OpInfo;
+    UINT32                  RuntimeArgTypes;
+    UINT32                  RuntimeArgTypes2;
+    UINT32                  RequiredBtypes;
+    UINT32                  ThisNodeBtype;
+    UINT32                  CommonBtypes;
+    UINT32                  OpcodeClass;
+    ACPI_PARSE_OBJECT       *ArgOp;
+    UINT32                  ArgType;
+
+
+    switch (Op->Asl.AmlOpcode)
+    {
+    case AML_RAW_DATA_BYTE:
+    case AML_RAW_DATA_WORD:
+    case AML_RAW_DATA_DWORD:
+    case AML_RAW_DATA_QWORD:
+    case AML_RAW_DATA_BUFFER:
+    case AML_RAW_DATA_CHAIN:
+    case AML_PACKAGE_LENGTH:
+    case AML_UNASSIGNED_OPCODE:
+    case AML_DEFAULT_ARG_OP:
+
+        /* Ignore the internal (compiler-only) AML opcodes */
+
+        return (AE_OK);
+
+    default:
+        break;
+    }
+
+    OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
+    if (!OpInfo)
+    {
+        return (AE_OK);
+    }
+
+    ArgOp           = Op->Asl.Child;
+    RuntimeArgTypes = OpInfo->RuntimeArgs;
+    OpcodeClass     = OpInfo->Class;
+
+#ifdef ASL_ERROR_NAMED_OBJECT_IN_WHILE
+    /*
+     * Update 11/2008: In practice, we can't perform this check. A simple
+     * analysis is not sufficient. Also, it can cause errors when compiling
+     * disassembled code because of the way Switch operators are implemented
+     * (a While(One) loop with a named temp variable created within.)
+     */
+
+    /*
+     * If we are creating a named object, check if we are within a while loop
+     * by checking if the parent is a WHILE op. This is a simple analysis, but
+     * probably sufficient for many cases.
+     *
+     * Allow Scope(), Buffer(), and Package().
+     */
+    if (((OpcodeClass == AML_CLASS_NAMED_OBJECT) && (Op->Asl.AmlOpcode != AML_SCOPE_OP)) ||
+        ((OpcodeClass == AML_CLASS_CREATE) && (OpInfo->Flags & AML_NSNODE)))
+    {
+        if (Op->Asl.Parent->Asl.AmlOpcode == AML_WHILE_OP)
+        {
+            AslError (ASL_ERROR, ASL_MSG_NAMED_OBJECT_IN_WHILE, Op, NULL);
+        }
+    }
+#endif
+
+    /*
+     * Special case for control opcodes IF/RETURN/WHILE since they
+     * have no runtime arg list (at this time)
+     */
+    switch (Op->Asl.AmlOpcode)
+    {
+    case AML_IF_OP:
+    case AML_WHILE_OP:
+    case AML_RETURN_OP:
+
+        if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)
+        {
+            /* Check for an internal method */
+
+            if (AnIsInternalMethod (ArgOp))
+            {
+                return (AE_OK);
+            }
+
+            /* The lone arg is a method call, check it */
+
+            RequiredBtypes = AnMapArgTypeToBtype (ARGI_INTEGER);
+            if (Op->Asl.AmlOpcode == AML_RETURN_OP)
+            {
+                RequiredBtypes = 0xFFFFFFFF;
+            }
+
+            ThisNodeBtype = AnGetBtype (ArgOp);
+            if (ThisNodeBtype == ACPI_UINT32_MAX)
+            {
+                return (AE_OK);
+            }
+            AnCheckMethodReturnValue (Op, OpInfo, ArgOp,
+                RequiredBtypes, ThisNodeBtype);
+        }
+        return (AE_OK);
+
+    default:
+        break;
+    }
+
+    /* Ignore the non-executable opcodes */
+
+    if (RuntimeArgTypes == ARGI_INVALID_OPCODE)
+    {
+        return (AE_OK);
+    }
+
+    switch (OpcodeClass)
+    {
+    case AML_CLASS_EXECUTE:
+    case AML_CLASS_CREATE:
+    case AML_CLASS_CONTROL:
+    case AML_CLASS_RETURN_VALUE:
+
+        /* TBD: Change class or fix typechecking for these */
+
+        if ((Op->Asl.AmlOpcode == AML_BUFFER_OP)        ||
+            (Op->Asl.AmlOpcode == AML_PACKAGE_OP)       ||
+            (Op->Asl.AmlOpcode == AML_VAR_PACKAGE_OP))
+        {
+            break;
+        }
+
+        /* Reverse the runtime argument list */
+
+        RuntimeArgTypes2 = 0;
+        while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes)))
+        {
+            RuntimeArgTypes2 <<= ARG_TYPE_WIDTH;
+            RuntimeArgTypes2 |= ArgType;
+            INCREMENT_ARG_LIST (RuntimeArgTypes);
+        }
+
+        while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2)))
+        {
+            RequiredBtypes = AnMapArgTypeToBtype (ArgType);
+
+            ThisNodeBtype = AnGetBtype (ArgOp);
+            if (ThisNodeBtype == ACPI_UINT32_MAX)
+            {
+                goto NextArgument;
+            }
+
+            /* Examine the arg based on the required type of the arg */
+
+            switch (ArgType)
+            {
+            case ARGI_TARGETREF:
+
+                if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO)
+                {
+                    /* ZERO is the placeholder for "don't store result" */
+
+                    ThisNodeBtype = RequiredBtypes;
+                    break;
+                }
+
+                if (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER)
+                {
+                    /*
+                     * This is the case where an original reference to a resource
+                     * descriptor field has been replaced by an (Integer) offset.
+                     * These named fields are supported at compile-time only;
+                     * the names are not passed to the interpreter (via the AML).
+                     */
+                    if ((ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
+                        (ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
+                    {
+                        AslError (ASL_ERROR, ASL_MSG_RESOURCE_FIELD, ArgOp, NULL);
+                    }
+                    else
+                    {
+                        AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, NULL);
+                    }
+                    break;
+                }
+
+                if ((ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) ||
+                    (ArgOp->Asl.ParseOpcode == PARSEOP_DEREFOF))
+                {
+                    break;
+                }
+
+                ThisNodeBtype = RequiredBtypes;
+                break;
+
+
+            case ARGI_REFERENCE:            /* References */
+            case ARGI_INTEGER_REF:
+            case ARGI_OBJECT_REF:
+            case ARGI_DEVICE_REF:
+
+                switch (ArgOp->Asl.ParseOpcode)
+                {
+                case PARSEOP_LOCAL0:
+                case PARSEOP_LOCAL1:
+                case PARSEOP_LOCAL2:
+                case PARSEOP_LOCAL3:
+                case PARSEOP_LOCAL4:
+                case PARSEOP_LOCAL5:
+                case PARSEOP_LOCAL6:
+                case PARSEOP_LOCAL7:
+
+                    /* TBD: implement analysis of current value (type) of the local */
+                    /* For now, just treat any local as a typematch */
+
+                    /*ThisNodeBtype = RequiredBtypes;*/
+                    break;
+
+                case PARSEOP_ARG0:
+                case PARSEOP_ARG1:
+                case PARSEOP_ARG2:
+                case PARSEOP_ARG3:
+                case PARSEOP_ARG4:
+                case PARSEOP_ARG5:
+                case PARSEOP_ARG6:
+
+                    /* Hard to analyze argument types, sow we won't */
+                    /* For now, just treat any arg as a typematch */
+
+                    /* ThisNodeBtype = RequiredBtypes; */
+                    break;
+
+                case PARSEOP_DEBUG:
+                    break;
+
+                case PARSEOP_REFOF:
+                case PARSEOP_INDEX:
+                default:
+                    break;
+
+                }
+                break;
+
+            case ARGI_INTEGER:
+            default:
+                break;
+            }
+
+
+            CommonBtypes = ThisNodeBtype & RequiredBtypes;
+
+            if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)
+            {
+                if (AnIsInternalMethod (ArgOp))
+                {
+                    return (AE_OK);
+                }
+
+                /* Check a method call for a valid return value */
+
+                AnCheckMethodReturnValue (Op, OpInfo, ArgOp,
+                    RequiredBtypes, ThisNodeBtype);
+            }
+
+            /*
+             * Now check if the actual type(s) match at least one
+             * bit to the required type
+             */
+            else if (!CommonBtypes)
+            {
+                /* No match -- this is a type mismatch error */
+
+                AnFormatBtype (StringBuffer, ThisNodeBtype);
+                AnFormatBtype (StringBuffer2, RequiredBtypes);
+
+                sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]",
+                            StringBuffer, OpInfo->Name, StringBuffer2);
+
+                AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);
+            }
+
+        NextArgument:
+            ArgOp = ArgOp->Asl.Next;
+            INCREMENT_ARG_LIST (RuntimeArgTypes2);
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AnOtherSemanticAnalysisWalkBegin
+ *
+ * PARAMETERS:  ASL_WALK_CALLBACK
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Descending callback for the analysis walk. Checks for
+ *              miscellaneous issues in the code.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AnOtherSemanticAnalysisWalkBegin (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  Level,
+    void                    *Context)
+{
+    ACPI_PARSE_OBJECT       *ArgNode;
+    ACPI_PARSE_OBJECT       *PrevArgNode = NULL;
+    const ACPI_OPCODE_INFO  *OpInfo;
+    ACPI_NAMESPACE_NODE     *Node;
+
+
+    OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
+
+    /*
+     * Determine if an execution class operator actually does something by
+     * checking if it has a target and/or the function return value is used.
+     * (Target is optional, so a standalone statement can actually do nothing.)
+     */
+    if ((OpInfo->Class == AML_CLASS_EXECUTE) &&
+        (OpInfo->Flags & AML_HAS_RETVAL) &&
+        (!AnIsResultUsed (Op)))
+    {
+        if (OpInfo->Flags & AML_HAS_TARGET)
+        {
+            /*
+             * Find the target node, it is always the last child. If the traget
+             * is not specified in the ASL, a default node of type Zero was
+             * created by the parser.
+             */
+            ArgNode = Op->Asl.Child;
+            while (ArgNode->Asl.Next)
+            {
+                PrevArgNode = ArgNode;
+                ArgNode = ArgNode->Asl.Next;
+            }
+
+            /* Divide() is the only weird case, it has two targets */
+
+            if (Op->Asl.AmlOpcode == AML_DIVIDE_OP)
+            {
+                if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) &&
+                    (PrevArgNode) &&
+                    (PrevArgNode->Asl.ParseOpcode == PARSEOP_ZERO))
+                {
+                    AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED,
+                        Op, Op->Asl.ExternalName);
+                }
+            }
+            else if (ArgNode->Asl.ParseOpcode == PARSEOP_ZERO)
+            {
+                AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED,
+                    Op, Op->Asl.ExternalName);
+            }
+        }
+        else
+        {
+            /*
+             * Has no target and the result is not used. Only a couple opcodes
+             * can have this combination.
+             */
+            switch (Op->Asl.ParseOpcode)
+            {
+            case PARSEOP_ACQUIRE:
+            case PARSEOP_WAIT:
+            case PARSEOP_LOADTABLE:
+                break;
+
+            default:
+                AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED,
+                    Op, Op->Asl.ExternalName);
+                break;
+            }
+        }
+    }
+
+
+    /*
+     * Semantic checks for individual ASL operators
+     */
+    switch (Op->Asl.ParseOpcode)
+    {
+    case PARSEOP_ACQUIRE:
+    case PARSEOP_WAIT:
+        /*
+         * Emit a warning if the timeout parameter for these operators is not
+         * ACPI_WAIT_FOREVER, and the result value from the operator is not
+         * checked, meaning that a timeout could happen, but the code
+         * would not know about it.
+         */
+
+        /* First child is the namepath, 2nd child is timeout */
+
+        ArgNode = Op->Asl.Child;
+        ArgNode = ArgNode->Asl.Next;
+
+        /*
+         * Check for the WAIT_FOREVER case - defined by the ACPI spec to be
+         * 0xFFFF or greater
+         */
+        if (((ArgNode->Asl.ParseOpcode == PARSEOP_WORDCONST) ||
+             (ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER))  &&
+             (ArgNode->Asl.Value.Integer >= (UINT64) ACPI_WAIT_FOREVER))
+        {
+            break;
+        }
+
+        /*
+         * The operation could timeout. If the return value is not used
+         * (indicates timeout occurred), issue a warning
+         */
+        if (!AnIsResultUsed (Op))
+        {
+            AslError (ASL_WARNING, ASL_MSG_TIMEOUT, ArgNode,
+                Op->Asl.ExternalName);
+        }
+        break;
+
+    case PARSEOP_CREATEFIELD:
+        /*
+         * Check for a zero Length (NumBits) operand. NumBits is the 3rd operand
+         */
+        ArgNode = Op->Asl.Child;
+        ArgNode = ArgNode->Asl.Next;
+        ArgNode = ArgNode->Asl.Next;
+
+        if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) ||
+           ((ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER) &&
+            (ArgNode->Asl.Value.Integer == 0)))
+        {
+            AslError (ASL_ERROR, ASL_MSG_NON_ZERO, ArgNode, NULL);
+        }
+        break;
+
+    case PARSEOP_CONNECTION:
+        /*
+         * Ensure that the referenced operation region has the correct SPACE_ID.
+         * From the grammar/parser, we know the parent is a FIELD definition.
+         */
+        ArgNode = Op->Asl.Parent;       /* Field definition */
+        ArgNode = ArgNode->Asl.Child;   /* First child is the OpRegion Name */
+        Node = ArgNode->Asl.Node;       /* OpRegion namespace node */
+
+        ArgNode = Node->Op;             /* OpRegion definition */
+        ArgNode = ArgNode->Asl.Child;   /* First child is the OpRegion Name */
+        ArgNode = ArgNode->Asl.Next;    /* Next peer is the SPACE_ID (what we want) */
+
+        /*
+         * The Connection() operator is only valid for the following operation
+         * region SpaceIds: GeneralPurposeIo and GenericSerialBus.
+         */
+        if ((ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) &&
+            (ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS))
+        {
+            AslError (ASL_ERROR, ASL_MSG_CONNECTION_INVALID, Op, NULL);
+        }
+        break;
+
+    case PARSEOP_FIELD:
+        /*
+         * Ensure that fields for GeneralPurposeIo and GenericSerialBus
+         * contain at least one Connection() operator
+         */
+        ArgNode = Op->Asl.Child;        /* 1st child is the OpRegion Name */
+        Node = ArgNode->Asl.Node;       /* OpRegion namespace node */
+        if (!Node)
+        {
+            break;
+        }
+
+        ArgNode = Node->Op;             /* OpRegion definition */
+        ArgNode = ArgNode->Asl.Child;   /* First child is the OpRegion Name */
+        ArgNode = ArgNode->Asl.Next;    /* Next peer is the SPACE_ID (what we want) */
+
+        /* We are only interested in GeneralPurposeIo and GenericSerialBus */
+
+        if ((ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) &&
+            (ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS))
+        {
+            break;
+        }
+
+        ArgNode = Op->Asl.Child;        /* 1st child is the OpRegion Name */
+        ArgNode = ArgNode->Asl.Next;    /* AccessType */
+        ArgNode = ArgNode->Asl.Next;    /* LockRule */
+        ArgNode = ArgNode->Asl.Next;    /* UpdateRule */
+        ArgNode = ArgNode->Asl.Next;    /* Start of FieldUnitList */
+
+        /* Walk the FieldUnitList */
+
+        while (ArgNode)
+        {
+            if (ArgNode->Asl.ParseOpcode == PARSEOP_CONNECTION)
+            {
+                break;
+            }
+            else if (ArgNode->Asl.ParseOpcode == PARSEOP_NAMESEG)
+            {
+                AslError (ASL_ERROR, ASL_MSG_CONNECTION_MISSING, ArgNode, NULL);
+                break;
+            }
+
+            ArgNode = ArgNode->Asl.Next;
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return (AE_OK);
+}