Initial import of the Intel-maintained ACPI Component Architecture. This

is Intel's reference implementation of the core operating-system ACPI
support.  (This import is on the vendor branch.)

1 files changed, 800 insertions, 0 deletions

diff --git a/sys/contrib/dev/acpica/dswexec.c b/sys/contrib/dev/acpica/dswexec.c
new file mode 100644
index 000000000000..7e3d58bd58d6
--- /dev/null
+++ b/sys/contrib/dev/acpica/dswexec.c
@@ -0,0 +1,800 @@
+/******************************************************************************
+ *
+ * Module Name: dswexec - Dispatcher method execution callbacks;
+ *                        dispatch to interpreter.
+ *              $Revision: 45 $
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999, Intel Corp.  All rights
+ * reserved.
+ *
+ * 2. License
+ *
+ * 2.1. This is your license from Intel Corp. under its intellectual property
+ * rights.  You may have additional license terms from the party that provided
+ * you this software, covering your right to use that party's intellectual
+ * property rights.
+ *
+ * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
+ * copy of the source code appearing in this file ("Covered Code") an
+ * irrevocable, perpetual, worldwide license under Intel's copyrights in the
+ * base code distributed originally by Intel ("Original Intel Code") to copy,
+ * make derivatives, distribute, use and display any portion of the Covered
+ * Code in any form, with the right to sublicense such rights; and
+ *
+ * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
+ * license (with the right to sublicense), under only those claims of Intel
+ * patents that are infringed by the Original Intel Code, to make, use, sell,
+ * offer to sell, and import the Covered Code and derivative works thereof
+ * solely to the minimum extent necessary to exercise the above copyright
+ * license, and in no event shall the patent license extend to any additions
+ * to or modifications of the Original Intel Code.  No other license or right
+ * is granted directly or by implication, estoppel or otherwise;
+ *
+ * The above copyright and patent license is granted only if the following
+ * conditions are met:
+ *
+ * 3. Conditions
+ *
+ * 3.1. Redistribution of Source with Rights to Further Distribute Source.
+ * Redistribution of source code of any substantial portion of the Covered
+ * Code or modification with rights to further distribute source must include
+ * the above Copyright Notice, the above License, this list of Conditions,
+ * and the following Disclaimer and Export Compliance provision.  In addition,
+ * Licensee must cause all Covered Code to which Licensee contributes to
+ * contain a file documenting the changes Licensee made to create that Covered
+ * Code and the date of any change.  Licensee must include in that file the
+ * documentation of any changes made by any predecessor Licensee.  Licensee
+ * must include a prominent statement that the modification is derived,
+ * directly or indirectly, from Original Intel Code.
+ *
+ * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
+ * Redistribution of source code of any substantial portion of the Covered
+ * Code or modification without rights to further distribute source must
+ * include the following Disclaimer and Export Compliance provision in the
+ * documentation and/or other materials provided with distribution.  In
+ * addition, Licensee may not authorize further sublicense of source of any
+ * portion of the Covered Code, and must include terms to the effect that the
+ * license from Licensee to its licensee is limited to the intellectual
+ * property embodied in the software Licensee provides to its licensee, and
+ * not to intellectual property embodied in modifications its licensee may
+ * make.
+ *
+ * 3.3. Redistribution of Executable. Redistribution in executable form of any
+ * substantial portion of the Covered Code or modification must reproduce the
+ * above Copyright Notice, and the following Disclaimer and Export Compliance
+ * provision in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3.4. Intel retains all right, title, and interest in and to the Original
+ * Intel Code.
+ *
+ * 3.5. Neither the name Intel nor any other trademark owned or controlled by
+ * Intel shall be used in advertising or otherwise to promote the sale, use or
+ * other dealings in products derived from or relating to the Covered Code
+ * without prior written authorization from Intel.
+ *
+ * 4. Disclaimer and Export Compliance
+ *
+ * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
+ * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
+ * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
+ * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
+ * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
+ * PARTICULAR PURPOSE.
+ *
+ * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
+ * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
+ * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
+ * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
+ * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
+ * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
+ * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
+ * LIMITED REMEDY.
+ *
+ * 4.3. Licensee shall not export, either directly or indirectly, any of this
+ * software or system incorporating such software without first obtaining any
+ * required license or other approval from the U. S. Department of Commerce or
+ * any other agency or department of the United States Government.  In the
+ * event Licensee exports any such software from the United States or
+ * re-exports any such software from a foreign destination, Licensee shall
+ * ensure that the distribution and export/re-export of the software is in
+ * compliance with all laws, regulations, orders, or other restrictions of the
+ * U.S. Export Administration Regulations. Licensee agrees that neither it nor
+ * any of its subsidiaries will export/re-export any technical data, process,
+ * software, or service, directly or indirectly, to any country for which the
+ * United States government or any agency thereof requires an export license,
+ * other governmental approval, or letter of assurance, without first obtaining
+ * such license, approval or letter.
+ *
+ *****************************************************************************/
+
+#define __DSWEXEC_C__
+
+#include "acpi.h"
+#include "acparser.h"
+#include "amlcode.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+#include "acdebug.h"
+
+
+#define _COMPONENT          DISPATCHER
+        MODULE_NAME         ("dswexec")
+
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    AcpiDsGetPredicateValue
+ *
+ * PARAMETERS:  WalkState       - Current state of the parse tree walk
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: 
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+AcpiDsGetPredicateValue (
+    ACPI_WALK_STATE         *WalkState,
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  HasResultObj)
+{
+    ACPI_STATUS             Status = AE_OK;
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+
+
+    FUNCTION_TRACE_PTR ("DsGetPredicateValue", WalkState);
+
+
+    WalkState->ControlState->Common.State = 0;
+
+    if (HasResultObj)
+    {
+        Status = AcpiDsResultStackPop (&ObjDesc, WalkState);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+    }
+
+    else
+    {
+        Status = AcpiDsCreateOperand (WalkState, Op);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+
+        Status = AcpiAmlResolveToValue (&WalkState->Operands [0], WalkState);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+
+        ObjDesc = WalkState->Operands [0];
+    }
+
+    if (!ObjDesc)
+    {
+        DEBUG_PRINT (ACPI_ERROR,
+            ("ExecEndOp: No predicate ObjDesc=%X State=%X\n",
+            ObjDesc, WalkState));
+
+        return_ACPI_STATUS (AE_AML_NO_OPERAND);
+    }
+
+
+    /* 
+     * Result of predicate evaluation currently must
+     * be a number
+     */
+
+    if (ObjDesc->Common.Type != ACPI_TYPE_NUMBER)
+    {
+        DEBUG_PRINT (ACPI_ERROR,
+            ("ExecEndOp: Bad predicate (not a number) ObjDesc=%X State=%X Type=%X\n",
+            ObjDesc, WalkState, ObjDesc->Common.Type));
+
+        Status = AE_AML_OPERAND_TYPE;
+        goto Cleanup;
+    }
+
+
+    /* 
+     * Save the result of the predicate evaluation on
+     * the control stack 
+     */
+
+    if (ObjDesc->Number.Value)
+    {
+        WalkState->ControlState->Common.Value = TRUE;
+    }
+
+    else
+    {
+        /* 
+         * Predicate is FALSE, we will just toss the
+         * rest of the package 
+         */
+
+        WalkState->ControlState->Common.Value = FALSE;
+        Status = AE_CTRL_FALSE;
+    }
+
+
+
+Cleanup:
+
+    DEBUG_PRINT (TRACE_EXEC,
+        ("ExecEndOp: Completed a predicate eval=%X Op=%X\n",
+        WalkState->ControlState->Common.Value, Op));
+
+     /* Break to debugger to display result */
+
+    DEBUGGER_EXEC (AcpiDbDisplayResultObject (ObjDesc, WalkState));
+
+    /* 
+     * Delete the predicate result object (we know that
+     * we don't need it anymore)
+     */
+
+    AcpiCmRemoveReference (ObjDesc);
+
+    WalkState->ControlState->Common.State = CONTROL_NORMAL;
+
+    return_ACPI_STATUS (Status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    AcpiDsExecBeginOp
+ *
+ * PARAMETERS:  WalkState       - Current state of the parse tree walk
+ *              Op              - Op that has been just been reached in the
+ *                                walk;  Arguments have not been evaluated yet.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Descending callback used during the execution of control
+ *              methods.  This is where most operators and operands are
+ *              dispatched to the interpreter.
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+AcpiDsExecBeginOp (
+    UINT16                  Opcode,
+    ACPI_PARSE_OBJECT       *Op,
+    ACPI_WALK_STATE         *WalkState,
+    ACPI_PARSE_OBJECT       **OutOp)
+{
+    ACPI_OPCODE_INFO        *OpInfo;
+    ACPI_STATUS             Status = AE_OK;
+
+
+    FUNCTION_TRACE_PTR ("DsExecBeginOp", Op);
+
+
+    if (!Op)
+    {
+        Status = AcpiDsLoad2BeginOp (Opcode, NULL, WalkState, OutOp);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+
+        Op = *OutOp;
+    }
+
+    if (Op == WalkState->Origin)
+    {
+        if (OutOp)
+        {
+            *OutOp = Op;
+        }
+
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    /*
+     * If the previous opcode was a conditional, this opcode
+     * must be the beginning of the associated predicate.
+     * Save this knowledge in the current scope descriptor
+     */
+
+    if ((WalkState->ControlState) &&
+        (WalkState->ControlState->Common.State ==
+            CONTROL_CONDITIONAL_EXECUTING))
+    {
+        DEBUG_PRINT (TRACE_EXEC, ("BeginOp: Exec predicate Op=%X State=%X\n",
+                        Op, WalkState));
+
+        WalkState->ControlState->Common.State = CONTROL_PREDICATE_EXECUTING;
+
+        /* Save start of predicate */
+
+        WalkState->ControlState->Control.PredicateOp = Op;
+    }
+
+
+    OpInfo = AcpiPsGetOpcodeInfo (Op->Opcode);
+
+    /* We want to send namepaths to the load code */
+
+    if (Op->Opcode == AML_NAMEPATH_OP)
+    {
+        OpInfo->Flags = OPTYPE_NAMED_OBJECT;
+    }
+
+
+    /*
+     * Handle the opcode based upon the opcode type
+     */
+
+    switch (ACPI_GET_OP_CLASS (OpInfo))
+    {
+    case OPTYPE_CONTROL:
+
+        Status = AcpiDsExecBeginControlOp (WalkState, Op);
+        break;
+
+
+    case OPTYPE_NAMED_OBJECT:
+
+        if (WalkState->WalkType == WALK_METHOD)
+        {
+            /*
+             * Found a named object declaration during method
+             * execution;  we must enter this object into the
+             * namespace.  The created object is temporary and
+             * will be deleted upon completion of the execution
+             * of this method.
+             */
+
+            Status = AcpiDsLoad2BeginOp (Op->Opcode, Op, WalkState, NULL);
+        }
+        break;
+
+
+    default:
+        break;
+    }
+
+    /* Nothing to do here during method execution */
+
+    return_ACPI_STATUS (Status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    AcpiDsExecEndOp
+ *
+ * PARAMETERS:  WalkState       - Current state of the parse tree walk
+ *              Op              - Op that has been just been completed in the
+ *                                walk;  Arguments have now been evaluated.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Ascending callback used during the execution of control
+ *              methods.  The only thing we really need to do here is to
+ *              notice the beginning of IF, ELSE, and WHILE blocks.
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+AcpiDsExecEndOp (
+    ACPI_WALK_STATE         *WalkState,
+    ACPI_PARSE_OBJECT       *Op)
+{
+    ACPI_STATUS             Status = AE_OK;
+    UINT16                  Opcode;
+    UINT8                   Optype;
+    ACPI_PARSE_OBJECT       *NextOp;
+    ACPI_NAMESPACE_NODE     *Node;
+    ACPI_PARSE_OBJECT       *FirstArg;
+    ACPI_OPERAND_OBJECT     *ResultObj = NULL;
+    ACPI_OPCODE_INFO        *OpInfo;
+    UINT32                  OperandIndex;
+
+
+    FUNCTION_TRACE_PTR ("DsExecEndOp", Op);
+
+
+    Opcode = (UINT16) Op->Opcode;
+
+
+    OpInfo = AcpiPsGetOpcodeInfo (Op->Opcode);
+    if (ACPI_GET_OP_TYPE (OpInfo) != ACPI_OP_TYPE_OPCODE)
+    {
+        DEBUG_PRINT (ACPI_ERROR, ("ExecEndOp: Unknown opcode. Op=%X\n",
+                        Op));
+
+        return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
+    }
+
+    Optype = (UINT8) ACPI_GET_OP_CLASS (OpInfo);
+    FirstArg = Op->Value.Arg;
+
+    /* Init the walk state */
+
+    WalkState->NumOperands = 0;
+    WalkState->ReturnDesc = NULL;
+
+
+    /* Call debugger for single step support (DEBUG build only) */
+
+    DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, Optype));
+    DEBUGGER_EXEC (if (ACPI_FAILURE (Status)) {return_ACPI_STATUS (Status);});
+
+
+    /* Decode the opcode */
+
+    switch (Optype)
+    {
+    case OPTYPE_UNDEFINED:
+
+        DEBUG_PRINT (ACPI_ERROR, ("ExecEndOp: Undefined opcode type Op=%X\n",
+            Op));
+        return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
+        break;
+
+
+    case OPTYPE_BOGUS:
+        DEBUG_PRINT (TRACE_DISPATCH,
+            ("ExecEndOp: Internal opcode=%X type Op=%X\n",
+            Opcode, Op));
+        break;
+
+    case OPTYPE_CONSTANT:           /* argument type only */
+    case OPTYPE_LITERAL:            /* argument type only */
+    case OPTYPE_DATA_TERM:          /* argument type only */
+    case OPTYPE_LOCAL_VARIABLE:     /* argument type only */
+    case OPTYPE_METHOD_ARGUMENT:    /* argument type only */
+        break;
+
+
+    /* most operators with arguments */
+
+    case OPTYPE_MONADIC1:
+    case OPTYPE_DYADIC1:
+    case OPTYPE_MONADIC2:
+    case OPTYPE_MONADIC2R:
+    case OPTYPE_DYADIC2:
+    case OPTYPE_DYADIC2R:
+    case OPTYPE_DYADIC2S:
+    case OPTYPE_RECONFIGURATION:
+    case OPTYPE_INDEX:
+    case OPTYPE_MATCH:
+    case OPTYPE_FATAL:
+
+
+        Status = AcpiDsCreateOperands (WalkState, FirstArg);
+        if (ACPI_FAILURE (Status))
+        {
+            goto Cleanup;
+        }
+
+        OperandIndex = WalkState->NumOperands - 1;
+
+        switch (Optype)
+        {
+
+        case OPTYPE_MONADIC1:
+
+            /* 1 Operand, 0 ExternalResult, 0 InternalResult */
+
+            Status = AcpiAmlExecMonadic1 (Opcode, WalkState);
+            break;
+
+
+        case OPTYPE_MONADIC2:
+
+            /* 1 Operand, 0 ExternalResult, 1 InternalResult */
+
+            Status = AcpiAmlExecMonadic2 (Opcode, WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+
+
+        case OPTYPE_MONADIC2R:
+
+            /* 1 Operand, 1 ExternalResult, 1 InternalResult */
+
+            Status = AcpiAmlExecMonadic2R (Opcode, WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+
+
+        case OPTYPE_DYADIC1:
+
+            /* 2 Operands, 0 ExternalResult, 0 InternalResult */
+
+            Status = AcpiAmlExecDyadic1 (Opcode, WalkState);
+
+            break;
+
+
+        case OPTYPE_DYADIC2:
+
+            /* 2 Operands, 0 ExternalResult, 1 InternalResult */
+
+            Status = AcpiAmlExecDyadic2 (Opcode, WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+
+
+        case OPTYPE_DYADIC2R:
+
+            /* 2 Operands, 1 or 2 ExternalResults, 1 InternalResult */
+
+
+            /* NEW INTERFACE:
+             * Pass in WalkState, keep result obj  but let interpreter
+             * push the result
+             */
+
+            Status = AcpiAmlExecDyadic2R (Opcode, WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+
+
+        case OPTYPE_DYADIC2S:   /* Synchronization Operator */
+
+            /* 2 Operands, 0 ExternalResult, 1 InternalResult */
+
+            Status = AcpiAmlExecDyadic2S (Opcode, WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+
+
+        case OPTYPE_RECONFIGURATION:
+
+            /* 1 or 2 operands, 0 Internal Result */
+
+            Status = AcpiAmlExecReconfiguration (Opcode, WalkState);
+            break;
+
+
+        case OPTYPE_FATAL:
+
+            /* 3 Operands, 0 ExternalResult, 0 InternalResult */
+
+            Status = AcpiAmlExecFatal (WalkState);
+            break;
+
+
+        case OPTYPE_INDEX:  /* Type 2 opcode with 3 operands */
+
+            /* 3 Operands, 1 ExternalResult, 1 InternalResult */
+
+            Status = AcpiAmlExecIndex (WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+
+
+        case OPTYPE_MATCH:  /* Type 2 opcode with 6 operands */
+
+            /* 6 Operands, 0 ExternalResult, 1 InternalResult */
+
+            Status = AcpiAmlExecMatch (WalkState, &ResultObj);
+            if (ACPI_SUCCESS (Status))
+            {
+                Status = AcpiDsResultStackPush (ResultObj, WalkState);
+            }
+
+            break;
+        }
+
+        break;
+
+
+    case OPTYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
+
+        /* 1 Operand, 0 ExternalResult, 0 InternalResult */
+
+        Status = AcpiDsExecEndControlOp (WalkState, Op);
+
+        break;
+
+
+    case OPTYPE_METHOD_CALL:
+
+        DEBUG_PRINT (TRACE_DISPATCH,
+            ("ExecEndOp: Method invocation, Op=%X\n", Op));
+
+        /*
+         * (AML_METHODCALL) Op->Value->Arg->Node contains
+         * the method Node pointer
+         */
+        /* NextOp points to the op that holds the method name */
+
+        NextOp = FirstArg;
+        Node = NextOp->Node;
+
+        /* NextOp points to first argument op */
+
+        NextOp = NextOp->Next;
+
+        /*
+         * Get the method's arguments and put them on the operand stack
+         */
+        Status = AcpiDsCreateOperands (WalkState, NextOp);
+        if (ACPI_FAILURE (Status))
+        {
+            break;
+        }
+
+        /*
+         * Since the operands will be passed to another
+         * control method, we must resolve all local
+         * references here (Local variables, arguments
+         * to *this* method, etc.)
+         */
+
+        Status = AcpiDsResolveOperands (WalkState);
+        if (ACPI_FAILURE (Status))
+        {
+            break;
+        }
+
+        /*
+         * Tell the walk loop to preempt this running method and
+         * execute the new method
+         */
+        Status = AE_CTRL_TRANSFER;
+
+        /*
+         * Return now; we don't want to disturb anything,
+         * especially the operand count!
+         */
+        return_ACPI_STATUS (Status);
+        break;
+
+
+    case OPTYPE_CREATE_FIELD:
+
+        DEBUG_PRINT (TRACE_EXEC,
+            ("ExecEndOp: Executing CreateField Buffer/Index Op=%X\n",
+            Op));
+
+        Status = AcpiDsLoad2EndOp (WalkState, Op);
+        if (ACPI_FAILURE (Status))
+        {
+            break;
+        }
+
+        Status = AcpiDsEvalFieldUnitOperands (WalkState, Op);
+        break;
+
+
+    case OPTYPE_NAMED_OBJECT:
+
+        Status = AcpiDsLoad2EndOp (WalkState, Op);
+        if (ACPI_FAILURE (Status))
+        {
+            break;
+        }
+
+        switch (Op->Opcode)
+        {
+        case AML_REGION_OP:
+
+            DEBUG_PRINT (TRACE_EXEC,
+                ("ExecEndOp: Executing OpRegion Address/Length Op=%X\n",
+                Op));
+
+            Status = AcpiDsEvalRegionOperands (WalkState, Op);
+
+            break;
+
+
+        case AML_METHOD_OP:
+
+            break;
+
+
+        case AML_ALIAS_OP:
+
+            /* Alias creation was already handled by call
+            to psxload above */
+            break;
+
+
+        default:
+            /* Nothing needs to be done */
+
+            Status = AE_OK;
+            break;
+        }
+
+        break;
+
+    default:
+
+        DEBUG_PRINT (ACPI_ERROR,
+            ("ExecEndOp: Unimplemented opcode, type=%X Opcode=%X Op=%X\n",
+            Optype, Op->Opcode, Op));
+
+        Status = AE_NOT_IMPLEMENTED;
+        break;
+    }
+
+
+    /*
+     * Check if we just completed the evaluation of a
+     * conditional predicate
+     */
+
+    if ((WalkState->ControlState) &&
+        (WalkState->ControlState->Common.State ==
+            CONTROL_PREDICATE_EXECUTING) &&
+        (WalkState->ControlState->Control.PredicateOp == Op))
+    {
+
+        Status = AcpiDsGetPredicateValue (WalkState, Op, (UINT32) ResultObj);
+        ResultObj = NULL;
+    }
+
+
+Cleanup:
+
+    if (ResultObj)
+    {
+        /* Break to debugger to display result */
+
+        DEBUGGER_EXEC (AcpiDbDisplayResultObject (ResultObj, WalkState));
+
+        /*
+         * Delete the result op if and only if:
+         * Parent will not use the result -- such as any
+         * non-nested type2 op in a method (parent will be method)
+         */
+        AcpiDsDeleteResultIfNotUsed (Op, ResultObj, WalkState);
+    }
+
+    /* Always clear the object stack */
+
+    /* TBD: [Investigate] Clear stack of return value,
+    but don't delete it */
+    WalkState->NumOperands = 0;
+
+    return_ACPI_STATUS (Status);
+}
+
+