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 /******************************************************************************
  *
  * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, 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 __EXOPARG2_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acparser.h"
 #include "acinterp.h"
 #include "acevents.h"
 #include "amlcode.h"
 
 
 #define _COMPONENT          ACPI_EXECUTER
         ACPI_MODULE_NAME    ("exoparg2")
 
 
 /*!
  * Naming convention for AML interpreter execution routines.
  *
  * The routines that begin execution of AML opcodes are named with a common
  * convention based upon the number of arguments, the number of target operands,
  * and whether or not a value is returned:
  *
  *      AcpiExOpcode_xA_yT_zR
  *
  * Where:
  *
  * xA - ARGUMENTS:    The number of arguments (input operands) that are
  *                    required for this opcode type (1 through 6 args).
  * yT - TARGETS:      The number of targets (output operands) that are required
  *                    for this opcode type (0, 1, or 2 targets).
  * zR - RETURN VALUE: Indicates whether this opcode type returns a value
  *                    as the function return (0 or 1).
  *
  * The AcpiExOpcode* functions are called via the Dispatcher component with
  * fully resolved operands.
 !*/
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExOpcode_2A_0T_0R
  *
  * PARAMETERS:  WalkState           - Current walk state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute opcode with two arguments, no target, and no return
  *              value.
  *
  * ALLOCATION:  Deletes both operands
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExOpcode_2A_0T_0R (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_NAMESPACE_NODE     *Node;
     UINT32                  Value;
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_0T_0R,
             AcpiPsGetOpcodeName (WalkState->Opcode));
 
 
     /* Examine the opcode */
 
     switch (WalkState->Opcode)
     {
     case AML_NOTIFY_OP:         /* Notify (NotifyObject, NotifyValue) */
 
         /* The first operand is a namespace node */
 
         Node = (ACPI_NAMESPACE_NODE *) Operand[0];
 
         /* Second value is the notify value */
 
         Value = (UINT32) Operand[1]->Integer.Value;
 
         /* Are notifies allowed on this object? */
 
         if (!AcpiEvIsNotifyObject (Node))
         {
             ACPI_ERROR ((AE_INFO,
                 "Unexpected notify object type [%s]",
                 AcpiUtGetTypeName (Node->Type)));
 
             Status = AE_AML_OPERAND_TYPE;
             break;
         }
 
 #ifdef ACPI_GPE_NOTIFY_CHECK
         /*
          * GPE method wake/notify check.  Here, we want to ensure that we
          * don't receive any "DeviceWake" Notifies from a GPE _Lxx or _Exx
          * GPE method during system runtime.  If we do, the GPE is marked
          * as "wake-only" and disabled.
          *
          * 1) Is the Notify() value == DeviceWake?
          * 2) Is this a GPE deferred method?  (An _Lxx or _Exx method)
          * 3) Did the original GPE happen at system runtime?
          *    (versus during wake)
          *
          * If all three cases are true, this is a wake-only GPE that should
          * be disabled at runtime.
          */
         if (Value == 2)     /* DeviceWake */
         {
             Status = AcpiEvCheckForWakeOnlyGpe (WalkState->GpeEventInfo);
             if (ACPI_FAILURE (Status))
             {
                 /* AE_WAKE_ONLY_GPE only error, means ignore this notify */
 
                 return_ACPI_STATUS (AE_OK)
             }
         }
 #endif
 
         /*
          * Dispatch the notify to the appropriate handler
          * NOTE: the request is queued for execution after this method
          * completes.  The notify handlers are NOT invoked synchronously
          * from this thread -- because handlers may in turn run other
          * control methods.
          */
         Status = AcpiEvQueueNotifyRequest (Node, Value);
         break;
 
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode %X",
             WalkState->Opcode));
         Status = AE_AML_BAD_OPCODE;
     }
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExOpcode_2A_2T_1R
  *
  * PARAMETERS:  WalkState           - Current walk state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
  *              and one implicit return value.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExOpcode_2A_2T_1R (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_OPERAND_OBJECT     *ReturnDesc1 = NULL;
     ACPI_OPERAND_OBJECT     *ReturnDesc2 = NULL;
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_2T_1R,
         AcpiPsGetOpcodeName (WalkState->Opcode));
 
 
     /* Execute the opcode */
 
     switch (WalkState->Opcode)
     {
     case AML_DIVIDE_OP:
 
         /* Divide (Dividend, Divisor, RemainderResult QuotientResult) */
 
         ReturnDesc1 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
         if (!ReturnDesc1)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         ReturnDesc2 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
         if (!ReturnDesc2)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         /* Quotient to ReturnDesc1, remainder to ReturnDesc2 */
 
         Status = AcpiUtDivide (Operand[0]->Integer.Value,
                                Operand[1]->Integer.Value,
                                &ReturnDesc1->Integer.Value,
                                &ReturnDesc2->Integer.Value);
         if (ACPI_FAILURE (Status))
         {
             goto Cleanup;
         }
         break;
 
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode %X",
             WalkState->Opcode));
         Status = AE_AML_BAD_OPCODE;
         goto Cleanup;
     }
 
     /* Store the results to the target reference operands */
 
     Status = AcpiExStore (ReturnDesc2, Operand[2], WalkState);
     if (ACPI_FAILURE (Status))
     {
         goto Cleanup;
     }
 
     Status = AcpiExStore (ReturnDesc1, Operand[3], WalkState);
     if (ACPI_FAILURE (Status))
     {
         goto Cleanup;
     }
 
 Cleanup:
     /*
      * Since the remainder is not returned indirectly, remove a reference to
      * it. Only the quotient is returned indirectly.
      */
     AcpiUtRemoveReference (ReturnDesc2);
 
     if (ACPI_FAILURE (Status))
     {
         /* Delete the return object */
 
         AcpiUtRemoveReference (ReturnDesc1);
     }
 
     /* Save return object (the remainder) on success */
 
     else
     {
         WalkState->ResultObj = ReturnDesc1;
     }
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExOpcode_2A_1T_1R
  *
  * PARAMETERS:  WalkState           - Current walk state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute opcode with two arguments, one target, and a return
  *              value.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExOpcode_2A_1T_1R (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
     ACPI_INTEGER            Index;
     ACPI_STATUS             Status = AE_OK;
     ACPI_SIZE               Length;
 
 
     ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_1T_1R,
         AcpiPsGetOpcodeName (WalkState->Opcode));
 
 
     /* Execute the opcode */
 
     if (WalkState->OpInfo->Flags & AML_MATH)
     {
         /* All simple math opcodes (add, etc.) */
 
         ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
         if (!ReturnDesc)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         ReturnDesc->Integer.Value = AcpiExDoMathOp (WalkState->Opcode,
                                                 Operand[0]->Integer.Value,
                                                 Operand[1]->Integer.Value);
         goto StoreResultToTarget;
     }
 
     switch (WalkState->Opcode)
     {
     case AML_MOD_OP: /* Mod (Dividend, Divisor, RemainderResult (ACPI 2.0) */
 
         ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
         if (!ReturnDesc)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         /* ReturnDesc will contain the remainder */
 
         Status = AcpiUtDivide (Operand[0]->Integer.Value,
                                Operand[1]->Integer.Value,
                                NULL,
                                &ReturnDesc->Integer.Value);
         break;
 
 
     case AML_CONCAT_OP: /* Concatenate (Data1, Data2, Result) */
 
         Status = AcpiExDoConcatenate (Operand[0], Operand[1],
                     &ReturnDesc, WalkState);
         break;
 
 
     case AML_TO_STRING_OP: /* ToString (Buffer, Length, Result) (ACPI 2.0) */
 
         /*
          * Input object is guaranteed to be a buffer at this point (it may have
          * been converted.)  Copy the raw buffer data to a new object of
          * type String.
          */
 
         /*
          * Get the length of the new string. It is the smallest of:
          * 1) Length of the input buffer
          * 2) Max length as specified in the ToString operator
          * 3) Length of input buffer up to a zero byte (null terminator)
          *
          * NOTE: A length of zero is ok, and will create a zero-length, null
          *       terminated string.
          */
         Length = 0;
         while ((Length < Operand[0]->Buffer.Length) &&
                (Length < Operand[1]->Integer.Value) &&
                (Operand[0]->Buffer.Pointer[Length]))
         {
             Length++;
         }
 
         /* Allocate a new string object */
 
         ReturnDesc = AcpiUtCreateStringObject (Length);
         if (!ReturnDesc)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         /*
          * Copy the raw buffer data with no transform.
          * (NULL terminated already)
          */
         ACPI_MEMCPY (ReturnDesc->String.Pointer,
             Operand[0]->Buffer.Pointer, Length);
         break;
 
 
     case AML_CONCAT_RES_OP:
 
         /* ConcatenateResTemplate (Buffer, Buffer, Result) (ACPI 2.0) */
 
         Status = AcpiExConcatTemplate (Operand[0], Operand[1],
                     &ReturnDesc, WalkState);
         break;
 
 
     case AML_INDEX_OP:              /* Index (Source Index Result) */
 
         /* Create the internal return object */
 
         ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
         if (!ReturnDesc)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         /* Initialize the Index reference object */
 
         Index = Operand[1]->Integer.Value;
         ReturnDesc->Reference.Value = (UINT32) Index;
         ReturnDesc->Reference.Class = ACPI_REFCLASS_INDEX;
 
         /*
          * At this point, the Source operand is a String, Buffer, or Package.
          * Verify that the index is within range.
          */
         switch ((Operand[0])->Common.Type)
         {
         case ACPI_TYPE_STRING:
 
             if (Index >= Operand[0]->String.Length)
             {
                 Status = AE_AML_STRING_LIMIT;
             }
 
             ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD;
             break;
 
         case ACPI_TYPE_BUFFER:
 
             if (Index >= Operand[0]->Buffer.Length)
             {
                 Status = AE_AML_BUFFER_LIMIT;
             }
 
             ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD;
             break;
 
         case ACPI_TYPE_PACKAGE:
 
             if (Index >= Operand[0]->Package.Count)
             {
                 Status = AE_AML_PACKAGE_LIMIT;
             }
 
             ReturnDesc->Reference.TargetType = ACPI_TYPE_PACKAGE;
             ReturnDesc->Reference.Where = &Operand[0]->Package.Elements [Index];
             break;
 
         default:
 
             Status = AE_AML_INTERNAL;
             goto Cleanup;
         }
 
         /* Failure means that the Index was beyond the end of the object */
 
         if (ACPI_FAILURE (Status))
         {
             ACPI_EXCEPTION ((AE_INFO, Status,
                 "Index (%X%8.8X) is beyond end of object",
                 ACPI_FORMAT_UINT64 (Index)));
             goto Cleanup;
         }
 
         /*
          * Save the target object and add a reference to it for the life
          * of the index
          */
         ReturnDesc->Reference.Object = Operand[0];
         AcpiUtAddReference (Operand[0]);
 
         /* Store the reference to the Target */
 
         Status = AcpiExStore (ReturnDesc, Operand[2], WalkState);
 
         /* Return the reference */
 
         WalkState->ResultObj = ReturnDesc;
         goto Cleanup;
 
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode %X",
             WalkState->Opcode));
         Status = AE_AML_BAD_OPCODE;
         break;
     }
 
 
 StoreResultToTarget:
 
     if (ACPI_SUCCESS (Status))
     {
         /*
          * Store the result of the operation (which is now in ReturnDesc) into
          * the Target descriptor.
          */
         Status = AcpiExStore (ReturnDesc, Operand[2], WalkState);
         if (ACPI_FAILURE (Status))
         {
             goto Cleanup;
         }
 
         if (!WalkState->ResultObj)
         {
             WalkState->ResultObj = ReturnDesc;
         }
     }
 
 
 Cleanup:
 
     /* Delete return object on error */
 
     if (ACPI_FAILURE (Status))
     {
         AcpiUtRemoveReference (ReturnDesc);
         WalkState->ResultObj = NULL;
     }
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExOpcode_2A_0T_1R
  *
  * PARAMETERS:  WalkState           - Current walk state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExOpcode_2A_0T_1R (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
     ACPI_STATUS             Status = AE_OK;
     BOOLEAN                 LogicalResult = FALSE;
 
 
     ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_0T_1R,
         AcpiPsGetOpcodeName (WalkState->Opcode));
 
 
     /* Create the internal return object */
 
     ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
     if (!ReturnDesc)
     {
         Status = AE_NO_MEMORY;
         goto Cleanup;
     }
 
     /* Execute the Opcode */
 
     if (WalkState->OpInfo->Flags & AML_LOGICAL_NUMERIC)
     {
         /* LogicalOp  (Operand0, Operand1) */
 
         Status = AcpiExDoLogicalNumericOp (WalkState->Opcode,
                         Operand[0]->Integer.Value, Operand[1]->Integer.Value,
                         &LogicalResult);
         goto StoreLogicalResult;
     }
     else if (WalkState->OpInfo->Flags & AML_LOGICAL)
     {
         /* LogicalOp  (Operand0, Operand1) */
 
         Status = AcpiExDoLogicalOp (WalkState->Opcode, Operand[0],
                     Operand[1], &LogicalResult);
         goto StoreLogicalResult;
     }
 
     switch (WalkState->Opcode)
     {
     case AML_ACQUIRE_OP:            /* Acquire (MutexObject, Timeout) */
 
         Status = AcpiExAcquireMutex (Operand[1], Operand[0], WalkState);
         if (Status == AE_TIME)
         {
             LogicalResult = TRUE;       /* TRUE = Acquire timed out */
             Status = AE_OK;
         }
         break;
 
 
     case AML_WAIT_OP:               /* Wait (EventObject, Timeout) */
 
         Status = AcpiExSystemWaitEvent (Operand[1], Operand[0]);
         if (Status == AE_TIME)
         {
             LogicalResult = TRUE;       /* TRUE, Wait timed out */
             Status = AE_OK;
         }
         break;
 
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode %X",
             WalkState->Opcode));
         Status = AE_AML_BAD_OPCODE;
         goto Cleanup;
     }
 
 
 StoreLogicalResult:
     /*
      * Set return value to according to LogicalResult. logical TRUE (all ones)
      * Default is FALSE (zero)
      */
     if (LogicalResult)
     {
         ReturnDesc->Integer.Value = ACPI_INTEGER_MAX;
     }
 
 Cleanup:
 
     /* Delete return object on error */
 
     if (ACPI_FAILURE (Status))
     {
         AcpiUtRemoveReference (ReturnDesc);
     }
 
     /* Save return object on success */
 
     else
     {
         WalkState->ResultObj = ReturnDesc;
     }
 
     return_ACPI_STATUS (Status);
 }