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 /******************************************************************************
  *
  * Module Name: exresop - AML Interpreter operand/object resolution
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, 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.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * 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.
  *
  * 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 MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * 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 DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "amlcode.h"
 #include "acparser.h"
 #include "acinterp.h"
 #include "acnamesp.h"
 
 
 #define _COMPONENT          ACPI_EXECUTER
         ACPI_MODULE_NAME    ("exresop")
 
 /* Local prototypes */
 
 static ACPI_STATUS
 AcpiExCheckObjectType (
     ACPI_OBJECT_TYPE        TypeNeeded,
     ACPI_OBJECT_TYPE        ThisType,
     void                    *Object);
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCheckObjectType
  *
  * PARAMETERS:  TypeNeeded          Object type needed
  *              ThisType            Actual object type
  *              Object              Object pointer
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Check required type against actual type
  *
  ******************************************************************************/
 
 static ACPI_STATUS
 AcpiExCheckObjectType (
     ACPI_OBJECT_TYPE        TypeNeeded,
     ACPI_OBJECT_TYPE        ThisType,
     void                    *Object)
 {
     ACPI_FUNCTION_ENTRY ();
 
 
     if (TypeNeeded == ACPI_TYPE_ANY)
     {
         /* All types OK, so we don't perform any typechecks */
 
         return (AE_OK);
     }
 
     if (TypeNeeded == ACPI_TYPE_LOCAL_REFERENCE)
     {
         /*
          * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
          * objects and thus allow them to be targets. (As per the ACPI
          * specification, a store to a constant is a noop.)
          */
         if ((ThisType == ACPI_TYPE_INTEGER) &&
             (((ACPI_OPERAND_OBJECT *) Object)->Common.Flags &
                 AOPOBJ_AML_CONSTANT))
         {
             return (AE_OK);
         }
     }
 
     if (TypeNeeded != ThisType)
     {
         ACPI_ERROR ((AE_INFO,
             "Needed type [%s], found [%s] %p",
             AcpiUtGetTypeName (TypeNeeded),
             AcpiUtGetTypeName (ThisType), Object));
 
         return (AE_AML_OPERAND_TYPE);
     }
 
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExResolveOperands
  *
  * PARAMETERS:  Opcode              - Opcode being interpreted
  *              StackPtr            - Pointer to the operand stack to be
  *                                    resolved
  *              WalkState           - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Convert multiple input operands to the types required by the
  *              target operator.
  *
  *      Each 5-bit group in ArgTypes represents one required
  *      operand and indicates the required Type. The corresponding operand
  *      will be converted to the required type if possible, otherwise we
  *      abort with an exception.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExResolveOperands (
     UINT16                  Opcode,
     ACPI_OPERAND_OBJECT     **StackPtr,
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_STATUS             Status = AE_OK;
     UINT8                   ObjectType;
     UINT32                  ArgTypes;
     const ACPI_OPCODE_INFO  *OpInfo;
     UINT32                  ThisArgType;
     ACPI_OBJECT_TYPE        TypeNeeded;
     UINT16                  TargetOp = 0;
 
 
     ACPI_FUNCTION_TRACE_U32 (ExResolveOperands, Opcode);
 
 
     OpInfo = AcpiPsGetOpcodeInfo (Opcode);
     if (OpInfo->Class == AML_CLASS_UNKNOWN)
     {
         return_ACPI_STATUS (AE_AML_BAD_OPCODE);
     }
 
     ArgTypes = OpInfo->RuntimeArgs;
     if (ArgTypes == ARGI_INVALID_OPCODE)
     {
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
             Opcode));
 
         return_ACPI_STATUS (AE_AML_INTERNAL);
     }
 
     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
         "Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
         Opcode, OpInfo->Name, ArgTypes));
 
     /*
      * Normal exit is with (ArgTypes == 0) at end of argument list.
      * Function will return an exception from within the loop upon
      * finding an entry which is not (or cannot be converted
      * to) the required type; if stack underflows; or upon
      * finding a NULL stack entry (which should not happen).
      */
     while (GET_CURRENT_ARG_TYPE (ArgTypes))
     {
         if (!StackPtr || !*StackPtr)
         {
             ACPI_ERROR ((AE_INFO, "Null stack entry at %p",
                 StackPtr));
 
             return_ACPI_STATUS (AE_AML_INTERNAL);
         }
 
         /* Extract useful items */
 
         ObjDesc = *StackPtr;
 
         /* Decode the descriptor type */
 
         switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
         {
         case ACPI_DESC_TYPE_NAMED:
 
             /* Namespace Node */
 
             ObjectType = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
 
             /*
              * Resolve an alias object. The construction of these objects
              * guarantees that there is only one level of alias indirection;
              * thus, the attached object is always the aliased namespace node
              */
             if (ObjectType == ACPI_TYPE_LOCAL_ALIAS)
             {
                 ObjDesc = AcpiNsGetAttachedObject (
                     (ACPI_NAMESPACE_NODE *) ObjDesc);
                 *StackPtr = ObjDesc;
                 ObjectType = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
             }
             break;
 
         case ACPI_DESC_TYPE_OPERAND:
 
             /* ACPI internal object */
 
             ObjectType = ObjDesc->Common.Type;
 
             /* Check for bad ACPI_OBJECT_TYPE */
 
             if (!AcpiUtValidObjectType (ObjectType))
             {
                 ACPI_ERROR ((AE_INFO,
                     "Bad operand object type [0x%X]", ObjectType));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
 
             if (ObjectType == (UINT8) ACPI_TYPE_LOCAL_REFERENCE)
             {
                 /* Validate the Reference */
 
                 switch (ObjDesc->Reference.Class)
                 {
                 case ACPI_REFCLASS_DEBUG:
 
                     TargetOp = AML_DEBUG_OP;
 
                     ACPI_FALLTHROUGH;
 
                 case ACPI_REFCLASS_ARG:
                 case ACPI_REFCLASS_LOCAL:
                 case ACPI_REFCLASS_INDEX:
                 case ACPI_REFCLASS_REFOF:
                 case ACPI_REFCLASS_TABLE:    /* DdbHandle from LOAD_OP or LOAD_TABLE_OP */
                 case ACPI_REFCLASS_NAME:     /* Reference to a named object */
 
                     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                         "Operand is a Reference, Class [%s] %2.2X\n",
                         AcpiUtGetReferenceName (ObjDesc),
                         ObjDesc->Reference.Class));
                     break;
 
                 default:
 
                     ACPI_ERROR ((AE_INFO,
                         "Unknown Reference Class 0x%2.2X in %p",
                         ObjDesc->Reference.Class, ObjDesc));
 
                     return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
                 }
             }
             break;
 
         default:
 
             /* Invalid descriptor */
 
             ACPI_ERROR ((AE_INFO, "Invalid descriptor %p [%s]",
                 ObjDesc, AcpiUtGetDescriptorName (ObjDesc)));
 
             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
         }
 
         /* Get one argument type, point to the next */
 
         ThisArgType = GET_CURRENT_ARG_TYPE (ArgTypes);
         INCREMENT_ARG_LIST (ArgTypes);
 
         /*
          * Handle cases where the object does not need to be
          * resolved to a value
          */
         switch (ThisArgType)
         {
         case ARGI_REF_OR_STRING:        /* Can be a String or Reference */
 
             if ((ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) ==
                 ACPI_DESC_TYPE_OPERAND) &&
                 (ObjDesc->Common.Type == ACPI_TYPE_STRING))
             {
                 /*
                  * String found - the string references a named object and
                  * must be resolved to a node
                  */
                 goto NextOperand;
             }
 
             /*
              * Else not a string - fall through to the normal Reference
              * case below
              */
             ACPI_FALLTHROUGH;
 
         case ARGI_REFERENCE:            /* References: */
         case ARGI_INTEGER_REF:
         case ARGI_OBJECT_REF:
         case ARGI_DEVICE_REF:
         case ARGI_TARGETREF:     /* Allows implicit conversion rules before store */
         case ARGI_FIXED_TARGET:  /* No implicit conversion before store to target */
         case ARGI_SIMPLE_TARGET: /* Name, Local, or Arg - no implicit conversion  */
         case ARGI_STORE_TARGET:
 
             /*
              * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
              * A Namespace Node is OK as-is
              */
             if (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) == ACPI_DESC_TYPE_NAMED)
             {
                 goto NextOperand;
             }
 
             Status = AcpiExCheckObjectType (
                 ACPI_TYPE_LOCAL_REFERENCE, ObjectType, ObjDesc);
             if (ACPI_FAILURE (Status))
             {
                 return_ACPI_STATUS (Status);
             }
             goto NextOperand;
 
         case ARGI_DATAREFOBJ:  /* Store operator only */
             /*
              * We don't want to resolve IndexOp reference objects during
              * a store because this would be an implicit DeRefOf operation.
              * Instead, we just want to store the reference object.
              * -- All others must be resolved below.
              */
             if ((Opcode == AML_STORE_OP) &&
                 ((*StackPtr)->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                 ((*StackPtr)->Reference.Class == ACPI_REFCLASS_INDEX))
             {
                 goto NextOperand;
             }
             break;
 
         default:
 
             /* All cases covered above */
 
             break;
         }
 
         /*
          * Resolve this object to a value
          */
         Status = AcpiExResolveToValue (StackPtr, WalkState);
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
 
         /* Get the resolved object */
 
         ObjDesc = *StackPtr;
 
         /*
          * Check the resulting object (value) type
          */
         switch (ThisArgType)
         {
         /*
          * For the simple cases, only one type of resolved object
          * is allowed
          */
         case ARGI_MUTEX:
 
             /* Need an operand of type ACPI_TYPE_MUTEX */
 
             TypeNeeded = ACPI_TYPE_MUTEX;
             break;
 
         case ARGI_EVENT:
 
             /* Need an operand of type ACPI_TYPE_EVENT */
 
             TypeNeeded = ACPI_TYPE_EVENT;
             break;
 
         case ARGI_PACKAGE:   /* Package */
 
             /* Need an operand of type ACPI_TYPE_PACKAGE */
 
             TypeNeeded = ACPI_TYPE_PACKAGE;
             break;
 
         case ARGI_ANYTYPE:
 
             /* Any operand type will do */
 
             TypeNeeded = ACPI_TYPE_ANY;
             break;
 
         case ARGI_DDBHANDLE:
 
             /* Need an operand of type ACPI_TYPE_DDB_HANDLE */
 
             TypeNeeded = ACPI_TYPE_LOCAL_REFERENCE;
             break;
 
 
         /*
          * The more complex cases allow multiple resolved object types
          */
         case ARGI_INTEGER:
 
             /*
              * Need an operand of type ACPI_TYPE_INTEGER, but we can
              * implicitly convert from a STRING or BUFFER.
              *
              * Known as "Implicit Source Operand Conversion"
              */
             Status = AcpiExConvertToInteger (ObjDesc, StackPtr,
                 ACPI_IMPLICIT_CONVERSION);
             if (ACPI_FAILURE (Status))
             {
                 if (Status == AE_TYPE)
                 {
                     ACPI_ERROR ((AE_INFO,
                         "Needed [Integer/String/Buffer], found [%s] %p",
                         AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                     return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
                 }
 
                 return_ACPI_STATUS (Status);
             }
 
             if (ObjDesc != *StackPtr)
             {
                 AcpiUtRemoveReference (ObjDesc);
             }
             goto NextOperand;
 
         case ARGI_BUFFER:
             /*
              * Need an operand of type ACPI_TYPE_BUFFER,
              * But we can implicitly convert from a STRING or INTEGER
              * Aka - "Implicit Source Operand Conversion"
              */
             Status = AcpiExConvertToBuffer (ObjDesc, StackPtr);
             if (ACPI_FAILURE (Status))
             {
                 if (Status == AE_TYPE)
                 {
                     ACPI_ERROR ((AE_INFO,
                         "Needed [Integer/String/Buffer], found [%s] %p",
                         AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                     return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
                 }
 
                 return_ACPI_STATUS (Status);
             }
 
             if (ObjDesc != *StackPtr)
             {
                 AcpiUtRemoveReference (ObjDesc);
             }
             goto NextOperand;
 
         case ARGI_STRING:
             /*
              * Need an operand of type ACPI_TYPE_STRING,
              * But we can implicitly convert from a BUFFER or INTEGER
              * Aka - "Implicit Source Operand Conversion"
              */
             Status = AcpiExConvertToString (
                 ObjDesc, StackPtr, ACPI_IMPLICIT_CONVERT_HEX);
             if (ACPI_FAILURE (Status))
             {
                 if (Status == AE_TYPE)
                 {
                     ACPI_ERROR ((AE_INFO,
                         "Needed [Integer/String/Buffer], found [%s] %p",
                         AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                     return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
                 }
 
                 return_ACPI_STATUS (Status);
             }
 
             if (ObjDesc != *StackPtr)
             {
                 AcpiUtRemoveReference (ObjDesc);
             }
             goto NextOperand;
 
         case ARGI_COMPUTEDATA:
 
             /* Need an operand of type INTEGER, STRING or BUFFER */
 
             switch (ObjDesc->Common.Type)
             {
             case ACPI_TYPE_INTEGER:
             case ACPI_TYPE_STRING:
             case ACPI_TYPE_BUFFER:
 
                 /* Valid operand */
                break;
 
             default:
                 ACPI_ERROR ((AE_INFO,
                     "Needed [Integer/String/Buffer], found [%s] %p",
                     AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             goto NextOperand;
 
         case ARGI_BUFFER_OR_STRING:
 
             /* Need an operand of type STRING or BUFFER */
 
             switch (ObjDesc->Common.Type)
             {
             case ACPI_TYPE_STRING:
             case ACPI_TYPE_BUFFER:
 
                 /* Valid operand */
                break;
 
             case ACPI_TYPE_INTEGER:
 
                 /* Highest priority conversion is to type Buffer */
 
                 Status = AcpiExConvertToBuffer (ObjDesc, StackPtr);
                 if (ACPI_FAILURE (Status))
                 {
                     return_ACPI_STATUS (Status);
                 }
 
                 if (ObjDesc != *StackPtr)
                 {
                     AcpiUtRemoveReference (ObjDesc);
                 }
                 break;
 
             default:
                 ACPI_ERROR ((AE_INFO,
                     "Needed [Integer/String/Buffer], found [%s] %p",
                     AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             goto NextOperand;
 
         case ARGI_DATAOBJECT:
             /*
              * ARGI_DATAOBJECT is only used by the SizeOf operator.
              * Need a buffer, string, package, or RefOf reference.
              *
              * The only reference allowed here is a direct reference to
              * a namespace node.
              */
             switch (ObjDesc->Common.Type)
             {
             case ACPI_TYPE_PACKAGE:
             case ACPI_TYPE_STRING:
             case ACPI_TYPE_BUFFER:
             case ACPI_TYPE_LOCAL_REFERENCE:
 
                 /* Valid operand */
                 break;
 
             default:
 
                 ACPI_ERROR ((AE_INFO,
                     "Needed [Buffer/String/Package/Reference], found [%s] %p",
                     AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             goto NextOperand;
 
         case ARGI_COMPLEXOBJ:
 
             /* Need a buffer or package or (ACPI 2.0) String */
 
             switch (ObjDesc->Common.Type)
             {
             case ACPI_TYPE_PACKAGE:
             case ACPI_TYPE_STRING:
             case ACPI_TYPE_BUFFER:
 
                 /* Valid operand */
                 break;
 
             default:
 
                 ACPI_ERROR ((AE_INFO,
                     "Needed [Buffer/String/Package], found [%s] %p",
                     AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             goto NextOperand;
 
         case ARGI_REGION_OR_BUFFER: /* Used by Load() only */
 
             /*
              * Need an operand of type REGION or a BUFFER
              * (which could be a resolved region field)
              */
             switch (ObjDesc->Common.Type)
             {
             case ACPI_TYPE_BUFFER:
             case ACPI_TYPE_REGION:
 
                 /* Valid operand */
                 break;
 
             default:
 
                 ACPI_ERROR ((AE_INFO,
                     "Needed [Region/Buffer], found [%s] %p",
                     AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             goto NextOperand;
 
         case ARGI_DATAREFOBJ:
 
             /* Used by the Store() operator only */
 
             switch (ObjDesc->Common.Type)
             {
             case ACPI_TYPE_INTEGER:
             case ACPI_TYPE_PACKAGE:
             case ACPI_TYPE_STRING:
             case ACPI_TYPE_BUFFER:
             case ACPI_TYPE_BUFFER_FIELD:
             case ACPI_TYPE_LOCAL_REFERENCE:
             case ACPI_TYPE_LOCAL_REGION_FIELD:
             case ACPI_TYPE_LOCAL_BANK_FIELD:
             case ACPI_TYPE_LOCAL_INDEX_FIELD:
             case ACPI_TYPE_DDB_HANDLE:
 
                 /* Valid operand */
                 break;
 
             default:
 
                 if (AcpiGbl_EnableInterpreterSlack)
                 {
                     /*
                      * Enable original behavior of Store(), allowing any
                      * and all objects as the source operand. The ACPI
                      * spec does not allow this, however.
                      */
                     break;
                 }
 
                 if (TargetOp == AML_DEBUG_OP)
                 {
                     /* Allow store of any object to the Debug object */
 
                     break;
                 }
 
                 ACPI_ERROR ((AE_INFO,
                     "Needed Integer/Buffer/String/Package/Ref/Ddb]"
                     ", found [%s] %p",
                     AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
 
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             goto NextOperand;
 
         default:
 
             /* Unknown type */
 
             ACPI_ERROR ((AE_INFO,
                 "Internal - Unknown ARGI (required operand) type 0x%X",
                 ThisArgType));
 
             return_ACPI_STATUS (AE_BAD_PARAMETER);
         }
 
         /*
          * Make sure that the original object was resolved to the
          * required object type (Simple cases only).
          */
         Status = AcpiExCheckObjectType (
             TypeNeeded, (*StackPtr)->Common.Type, *StackPtr);
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
 
 NextOperand:
         /*
          * If more operands needed, decrement StackPtr to point
          * to next operand on stack
          */
         if (GET_CURRENT_ARG_TYPE (ArgTypes))
         {
             StackPtr--;
         }
     }
 
     ACPI_DUMP_OPERANDS (WalkState->Operands,
         AcpiPsGetOpcodeName (Opcode), WalkState->NumOperands);
 
     return_ACPI_STATUS (Status);
 }

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