FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/executer/exoparg1.c

     /******************************************************************************
      *
      * Module Name: exoparg1 - AML execution - opcodes with 1 argument
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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 <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acparser.h>
   #include <contrib/dev/acpica/include/acdispat.h>
   #include <contrib/dev/acpica/include/acinterp.h>
   #include <contrib/dev/acpica/include/amlcode.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   
   
   #define _COMPONENT          ACPI_EXECUTER
           ACPI_MODULE_NAME    ("exoparg1")
   
   
   /*!
    * 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 (0 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_0A_0T_1R
    *
    * PARAMETERS:  WalkState           - Current state (contains AML opcode)
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Execute operator with no operands, one return value
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExOpcode_0A_0T_1R (
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
   
   
       ACPI_FUNCTION_TRACE_STR (ExOpcode_0A_0T_1R,
           AcpiPsGetOpcodeName (WalkState->Opcode));
   
   
       /* Examine the AML opcode */
   
       switch (WalkState->Opcode)
       {
       case AML_TIMER_OP:      /*  Timer () */
   
           /* Create a return object of type Integer */
   
           ReturnDesc = AcpiUtCreateIntegerObject (AcpiOsGetTimer ());
           if (!ReturnDesc)
           {
               Status = AE_NO_MEMORY;
               goto Cleanup;
           }
           break;
   
       default:                /*  Unknown opcode  */
   
           ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
               WalkState->Opcode));
           Status = AE_AML_BAD_OPCODE;
           break;
       }
   
   Cleanup:
   
       /* Delete return object on error */
   
       if ((ACPI_FAILURE (Status)) || WalkState->ResultObj)
       {
           AcpiUtRemoveReference (ReturnDesc);
           WalkState->ResultObj = NULL;
       }
       else
       {
           /* Save the return value */
   
           WalkState->ResultObj = ReturnDesc;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExOpcode_1A_0T_0R
    *
    * PARAMETERS:  WalkState           - Current state (contains AML opcode)
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
    *              object stack
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExOpcode_1A_0T_0R (
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
       ACPI_STATUS             Status = AE_OK;
   
   
       ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_0R,
           AcpiPsGetOpcodeName (WalkState->Opcode));
   
   
       /* Examine the AML opcode */
   
       switch (WalkState->Opcode)
       {
       case AML_RELEASE_OP:    /*  Release (MutexObject) */
   
           Status = AcpiExReleaseMutex (Operand[0], WalkState);
           break;
   
       case AML_RESET_OP:      /*  Reset (EventObject) */
   
           Status = AcpiExSystemResetEvent (Operand[0]);
           break;
   
       case AML_SIGNAL_OP:     /*  Signal (EventObject) */
   
           Status = AcpiExSystemSignalEvent (Operand[0]);
           break;
   
       case AML_SLEEP_OP:      /*  Sleep (MsecTime) */
   
           Status = AcpiExSystemDoSleep (Operand[0]->Integer.Value);
           break;
   
       case AML_STALL_OP:      /*  Stall (UsecTime) */
   
           Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value);
           break;
   
       case AML_UNLOAD_OP:     /*  Unload (Handle) */
   
           Status = AcpiExUnloadTable (Operand[0]);
           break;
   
       default:                /*  Unknown opcode  */
   
           ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
               WalkState->Opcode));
           Status = AE_AML_BAD_OPCODE;
           break;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   #ifdef _OBSOLETE_CODE /* Was originally used for Load() operator */
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExOpcode_1A_1T_0R
    *
    * PARAMETERS:  WalkState           - Current state (contains AML opcode)
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Execute opcode with one argument, one target, and no
    *              return value.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExOpcode_1A_1T_0R (
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
   
   
       ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R,
           AcpiPsGetOpcodeName (WalkState->Opcode));
   
   
       /* Examine the AML opcode */
   
       switch (WalkState->Opcode)
       {
   #ifdef _OBSOLETE_CODE
       case AML_LOAD_OP:
   
           Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState);
           break;
   #endif
   
       default:                        /* Unknown opcode */
   
           ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
               WalkState->Opcode));
           Status = AE_AML_BAD_OPCODE;
           goto Cleanup;
       }
   
   
   Cleanup:
   
       return_ACPI_STATUS (Status);
   }
   #endif
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExOpcode_1A_1T_1R
    *
    * PARAMETERS:  WalkState           - Current state (contains AML opcode)
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Execute opcode with one argument, one target, and a
    *              return value.
    *              January 2022: Added Load operator, with new ACPI 6.4
    *              semantics.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExOpcode_1A_1T_1R (
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
       ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
       ACPI_OPERAND_OBJECT     *ReturnDesc2 = NULL;
       UINT32                  Temp32;
       UINT32                  i;
       UINT64                  PowerOfTen;
       UINT64                  Digit;
   
   
       ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R,
           AcpiPsGetOpcodeName (WalkState->Opcode));
   
   
       /* Examine the AML opcode */
   
       switch (WalkState->Opcode)
       {
       case AML_BIT_NOT_OP:
       case AML_FIND_SET_LEFT_BIT_OP:
       case AML_FIND_SET_RIGHT_BIT_OP:
       case AML_FROM_BCD_OP:
       case AML_LOAD_OP:
       case AML_TO_BCD_OP:
       case AML_CONDITIONAL_REF_OF_OP:
   
           /* Create a return object of type Integer for these opcodes */
   
           ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
           if (!ReturnDesc)
           {
               Status = AE_NO_MEMORY;
               goto Cleanup;
           }
   
           switch (WalkState->Opcode)
           {
           case AML_BIT_NOT_OP:            /* Not (Operand, Result)  */
   
               ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value;
               break;
   
           case AML_FIND_SET_LEFT_BIT_OP:  /* FindSetLeftBit (Operand, Result) */
   
               ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
   
               /*
                * Acpi specification describes Integer type as a little
                * endian unsigned value, so this boundary condition is valid.
                */
               for (Temp32 = 0; ReturnDesc->Integer.Value &&
                       Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
               {
                   ReturnDesc->Integer.Value >>= 1;
               }
   
               ReturnDesc->Integer.Value = Temp32;
               break;
   
           case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */
   
               ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
   
               /*
                * The Acpi specification describes Integer type as a little
                * endian unsigned value, so this boundary condition is valid.
                */
               for (Temp32 = 0; ReturnDesc->Integer.Value &&
                        Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
               {
                   ReturnDesc->Integer.Value <<= 1;
               }
   
               /* Since the bit position is one-based, subtract from 33 (65) */
   
               ReturnDesc->Integer.Value =
                   Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32;
               break;
   
           case AML_FROM_BCD_OP:           /* FromBcd (BCDValue, Result)  */
               /*
                * The 64-bit ACPI integer can hold 16 4-bit BCD characters
                * (if table is 32-bit, integer can hold 8 BCD characters)
                * Convert each 4-bit BCD value
                */
               PowerOfTen = 1;
               ReturnDesc->Integer.Value = 0;
               Digit = Operand[0]->Integer.Value;
   
               /* Convert each BCD digit (each is one nybble wide) */
   
               for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
               {
                   /* Get the least significant 4-bit BCD digit */
   
                   Temp32 = ((UINT32) Digit) & 0xF;
   
                   /* Check the range of the digit */
   
                   if (Temp32 > 9)
                   {
                       ACPI_ERROR ((AE_INFO,
                           "BCD digit too large (not decimal): 0x%X",
                           Temp32));
   
                       Status = AE_AML_NUMERIC_OVERFLOW;
                       goto Cleanup;
                   }
   
                   /* Sum the digit into the result with the current power of 10 */
   
                   ReturnDesc->Integer.Value +=
                       (((UINT64) Temp32) * PowerOfTen);
   
                   /* Shift to next BCD digit */
   
                   Digit >>= 4;
   
                   /* Next power of 10 */
   
                   PowerOfTen *= 10;
               }
               break;
   
           case AML_LOAD_OP:               /* Result1 = Load (Operand[0], Result1) */
   
               ReturnDesc->Integer.Value = 0;
               Status = AcpiExLoadOp (Operand[0], ReturnDesc, WalkState);
               if (ACPI_SUCCESS (Status))
               {
                   /* Return -1 (non-zero) indicates success */
   
                   ReturnDesc->Integer.Value = 0xFFFFFFFFFFFFFFFF;
               }
               break;
   
           case AML_TO_BCD_OP:             /* ToBcd (Operand, Result)  */
   
               ReturnDesc->Integer.Value = 0;
               Digit = Operand[0]->Integer.Value;
   
               /* Each BCD digit is one nybble wide */
   
               for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
               {
                   (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32);
   
                   /*
                    * Insert the BCD digit that resides in the
                    * remainder from above
                    */
                   ReturnDesc->Integer.Value |=
                       (((UINT64) Temp32) << ACPI_MUL_4 (i));
               }
   
               /* Overflow if there is any data left in Digit */
   
               if (Digit > 0)
               {
                   ACPI_ERROR ((AE_INFO,
                       "Integer too large to convert to BCD: 0x%8.8X%8.8X",
                       ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value)));
                   Status = AE_AML_NUMERIC_OVERFLOW;
                   goto Cleanup;
               }
               break;
   
           case AML_CONDITIONAL_REF_OF_OP:     /* CondRefOf (SourceObject, Result)  */
               /*
                * This op is a little strange because the internal return value is
                * different than the return value stored in the result descriptor
                * (There are really two return values)
                */
               if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
               {
                   /*
                    * This means that the object does not exist in the namespace,
                    * return FALSE
                    */
                   ReturnDesc->Integer.Value = 0;
                   goto Cleanup;
               }
   
               /* Get the object reference, store it, and remove our reference */
   
               Status = AcpiExGetObjectReference (Operand[0],
                   &ReturnDesc2, WalkState);
               if (ACPI_FAILURE (Status))
               {
                   goto Cleanup;
               }
   
               Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
               AcpiUtRemoveReference (ReturnDesc2);
   
               /* The object exists in the namespace, return TRUE */
   
               ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
               goto Cleanup;
   
   
           default:
   
               /* No other opcodes get here */
   
               break;
           }
           break;
   
       case AML_STORE_OP:              /* Store (Source, Target) */
           /*
            * A store operand is typically a number, string, buffer or lvalue
            * Be careful about deleting the source object,
            * since the object itself may have been stored.
            */
           Status = AcpiExStore (Operand[0], Operand[1], WalkState);
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           /* It is possible that the Store already produced a return object */
   
           if (!WalkState->ResultObj)
           {
               /*
                * Normally, we would remove a reference on the Operand[0]
                * parameter; But since it is being used as the internal return
                * object (meaning we would normally increment it), the two
                * cancel out, and we simply don't do anything.
                */
               WalkState->ResultObj = Operand[0];
               WalkState->Operands[0] = NULL;  /* Prevent deletion */
           }
           return_ACPI_STATUS (Status);
   
       /*
        * ACPI 2.0 Opcodes
        */
       case AML_COPY_OBJECT_OP:        /* CopyObject (Source, Target) */
   
           Status = AcpiUtCopyIobjectToIobject (
               Operand[0], &ReturnDesc, WalkState);
           break;
   
       case AML_TO_DECIMAL_STRING_OP:  /* ToDecimalString (Data, Result) */
   
           Status = AcpiExConvertToString (
               Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_DECIMAL);
           if (ReturnDesc == Operand[0])
           {
               /* No conversion performed, add ref to handle return value */
   
               AcpiUtAddReference (ReturnDesc);
           }
           break;
   
       case AML_TO_HEX_STRING_OP:      /* ToHexString (Data, Result) */
   
           Status = AcpiExConvertToString (
               Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_HEX);
           if (ReturnDesc == Operand[0])
           {
               /* No conversion performed, add ref to handle return value */
   
               AcpiUtAddReference (ReturnDesc);
           }
           break;
   
       case AML_TO_BUFFER_OP:          /* ToBuffer (Data, Result) */
   
           Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc);
           if (ReturnDesc == Operand[0])
           {
               /* No conversion performed, add ref to handle return value */
   
               AcpiUtAddReference (ReturnDesc);
           }
           break;
   
       case AML_TO_INTEGER_OP:         /* ToInteger (Data, Result) */
   
           /* Perform "explicit" conversion */
   
           Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, 0);
           if (ReturnDesc == Operand[0])
           {
               /* No conversion performed, add ref to handle return value */
   
               AcpiUtAddReference (ReturnDesc);
           }
           break;
   
       case AML_SHIFT_LEFT_BIT_OP:     /* ShiftLeftBit (Source, BitNum)  */
       case AML_SHIFT_RIGHT_BIT_OP:    /* ShiftRightBit (Source, BitNum) */
   
           /* These are two obsolete opcodes */
   
           ACPI_ERROR ((AE_INFO,
               "%s is obsolete and not implemented",
               AcpiPsGetOpcodeName (WalkState->Opcode)));
           Status = AE_SUPPORT;
           goto Cleanup;
   
       default:                        /* Unknown opcode */
   
           ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
               WalkState->Opcode));
           Status = AE_AML_BAD_OPCODE;
           goto Cleanup;
       }
   
       if (ACPI_SUCCESS (Status))
       {
           /* Store the return value computed above into the target object */
   
           Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
       }
   
   
   Cleanup:
   
       /* Delete return object on error */
   
       if (ACPI_FAILURE (Status))
       {
           AcpiUtRemoveReference (ReturnDesc);
       }
   
       /* Save return object on success */
   
       else if (!WalkState->ResultObj)
       {
           WalkState->ResultObj = ReturnDesc;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExOpcode_1A_0T_1R
    *
    * PARAMETERS:  WalkState           - Current state (contains AML opcode)
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Execute opcode with one argument, no target, and a return value
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExOpcode_1A_0T_1R (
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
       ACPI_OPERAND_OBJECT     *TempDesc;
       ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
       ACPI_STATUS             Status = AE_OK;
       UINT32                  Type;
       UINT64                  Value;
   
   
       ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R,
           AcpiPsGetOpcodeName (WalkState->Opcode));
   
   
       /* Examine the AML opcode */
   
       switch (WalkState->Opcode)
       {
       case AML_LOGICAL_NOT_OP:        /* LNot (Operand) */
   
           ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0);
           if (!ReturnDesc)
           {
               Status = AE_NO_MEMORY;
               goto Cleanup;
           }
   
           /*
            * Set result to ONES (TRUE) if Value == 0. Note:
            * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above.
            */
           if (!Operand[0]->Integer.Value)
           {
               ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
           }
           break;
   
       case AML_DECREMENT_OP:          /* Decrement (Operand)  */
       case AML_INCREMENT_OP:          /* Increment (Operand)  */
           /*
            * Create a new integer. Can't just get the base integer and
            * increment it because it may be an Arg or Field.
            */
           ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
           if (!ReturnDesc)
           {
               Status = AE_NO_MEMORY;
               goto Cleanup;
           }
   
           /*
            * Since we are expecting a Reference operand, it can be either a
            * NS Node or an internal object.
            */
           TempDesc = Operand[0];
           if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND)
           {
               /* Internal reference object - prevent deletion */
   
               AcpiUtAddReference (TempDesc);
           }
   
           /*
            * Convert the Reference operand to an Integer (This removes a
            * reference on the Operand[0] object)
            *
            * NOTE:  We use LNOT_OP here in order to force resolution of the
            * reference operand to an actual integer.
            */
           Status = AcpiExResolveOperands (AML_LOGICAL_NOT_OP,
               &TempDesc, WalkState);
           if (ACPI_FAILURE (Status))
           {
               ACPI_EXCEPTION ((AE_INFO, Status,
                   "While resolving operands for [%s]",
                   AcpiPsGetOpcodeName (WalkState->Opcode)));
   
               goto Cleanup;
           }
   
           /*
            * TempDesc is now guaranteed to be an Integer object --
            * Perform the actual increment or decrement
            */
           if (WalkState->Opcode == AML_INCREMENT_OP)
           {
               ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1;
           }
           else
           {
               ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1;
           }
   
           /* Finished with this Integer object */
   
           AcpiUtRemoveReference (TempDesc);
   
           /*
            * Store the result back (indirectly) through the original
            * Reference object
            */
           Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
           break;
   
       case AML_OBJECT_TYPE_OP:            /* ObjectType (SourceObject) */
           /*
            * Note: The operand is not resolved at this point because we want to
            * get the associated object, not its value. For example, we don't
            * want to resolve a FieldUnit to its value, we want the actual
            * FieldUnit object.
            */
   
           /* Get the type of the base object */
   
           Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
           if (ACPI_FAILURE (Status))
           {
               goto Cleanup;
           }
   
           /* Allocate a descriptor to hold the type. */
   
           ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type);
           if (!ReturnDesc)
           {
               Status = AE_NO_MEMORY;
               goto Cleanup;
           }
           break;
   
       case AML_SIZE_OF_OP:            /* SizeOf (SourceObject)  */
           /*
            * Note: The operand is not resolved at this point because we want to
            * get the associated object, not its value.
            */
   
           /* Get the base object */
   
           Status = AcpiExResolveMultiple (
               WalkState, Operand[0], &Type, &TempDesc);
           if (ACPI_FAILURE (Status))
           {
               goto Cleanup;
           }
   
           /*
            * The type of the base object must be integer, buffer, string, or
            * package. All others are not supported.
            *
            * NOTE: Integer is not specifically supported by the ACPI spec,
            * but is supported implicitly via implicit operand conversion.
            * rather than bother with conversion, we just use the byte width
            * global (4 or 8 bytes).
            */
           switch (Type)
           {
           case ACPI_TYPE_INTEGER:
   
               Value = AcpiGbl_IntegerByteWidth;
               break;
   
           case ACPI_TYPE_STRING:
   
               Value = TempDesc->String.Length;
               break;
   
           case ACPI_TYPE_BUFFER:
   
               /* Buffer arguments may not be evaluated at this point */
   
               Status = AcpiDsGetBufferArguments (TempDesc);
               Value = TempDesc->Buffer.Length;
               break;
   
           case ACPI_TYPE_PACKAGE:
   
               /* Package arguments may not be evaluated at this point */
   
               Status = AcpiDsGetPackageArguments (TempDesc);
               Value = TempDesc->Package.Count;
               break;
   
           default:
   
               ACPI_ERROR ((AE_INFO,
                   "Operand must be Buffer/Integer/String/Package"
                   " - found type %s",
                   AcpiUtGetTypeName (Type)));
   
               Status = AE_AML_OPERAND_TYPE;
               goto Cleanup;
           }
   
           if (ACPI_FAILURE (Status))
           {
               goto Cleanup;
           }
   
           /*
            * Now that we have the size of the object, create a result
            * object to hold the value
            */
           ReturnDesc = AcpiUtCreateIntegerObject (Value);
           if (!ReturnDesc)
           {
               Status = AE_NO_MEMORY;
               goto Cleanup;
           }
           break;
   
   
       case AML_REF_OF_OP:             /* RefOf (SourceObject) */
   
           Status = AcpiExGetObjectReference (
               Operand[0], &ReturnDesc, WalkState);
           if (ACPI_FAILURE (Status))
           {
               goto Cleanup;
           }
           break;
   
   
       case AML_DEREF_OF_OP:           /* DerefOf (ObjReference | String) */
   
           /* Check for a method local or argument, or standalone String */
   
           if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
           {
               TempDesc = AcpiNsGetAttachedObject (
                   (ACPI_NAMESPACE_NODE *) Operand[0]);
               if (TempDesc &&
                    ((TempDesc->Common.Type == ACPI_TYPE_STRING) ||
                     (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)))
               {
                   Operand[0] = TempDesc;
                   AcpiUtAddReference (TempDesc);
               }
               else
               {
                   Status = AE_AML_OPERAND_TYPE;
                   goto Cleanup;
               }
           }
           else
           {
               switch ((Operand[0])->Common.Type)
               {
               case ACPI_TYPE_LOCAL_REFERENCE:
                   /*
                   * This is a DerefOf (LocalX | ArgX)
                   *
                   * Must resolve/dereference the local/arg reference first
                   */
                  switch (Operand[0]->Reference.Class)
                  {
                  case ACPI_REFCLASS_LOCAL:
                  case ACPI_REFCLASS_ARG:
  
                      /* Set Operand[0] to the value of the local/arg */
  
                      Status = AcpiDsMethodDataGetValue (
                          Operand[0]->Reference.Class,
                          Operand[0]->Reference.Value,
                          WalkState, &TempDesc);
                      if (ACPI_FAILURE (Status))
                      {
                          goto Cleanup;
                      }
  
                      /*
                       * Delete our reference to the input object and
                       * point to the object just retrieved
                       */
                      AcpiUtRemoveReference (Operand[0]);
                      Operand[0] = TempDesc;
                      break;
  
                  case ACPI_REFCLASS_REFOF:
  
                      /* Get the object to which the reference refers */
  
                      TempDesc = Operand[0]->Reference.Object;
                      AcpiUtRemoveReference (Operand[0]);
                      Operand[0] = TempDesc;
                      break;
  
                  default:
  
                      /* Must be an Index op - handled below */
                      break;
                  }
                  break;
  
              case ACPI_TYPE_STRING:
  
                  break;
  
              default:
  
                  Status = AE_AML_OPERAND_TYPE;
                  goto Cleanup;
              }
          }
  
          if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED)
          {
              if ((Operand[0])->Common.Type == ACPI_TYPE_STRING)
              {
                  /*
                   * This is a DerefOf (String). The string is a reference
                   * to a named ACPI object.
                   *
                   * 1) Find the owning Node
                   * 2) Dereference the node to an actual object. Could be a
                   *    Field, so we need to resolve the node to a value.
                   */
                  Status = AcpiNsGetNodeUnlocked (WalkState->ScopeInfo->Scope.Node,
                      Operand[0]->String.Pointer,
                      ACPI_NS_SEARCH_PARENT,
                      ACPI_CAST_INDIRECT_PTR (
                          ACPI_NAMESPACE_NODE, &ReturnDesc));
                  if (ACPI_FAILURE (Status))
                  {
                      goto Cleanup;
                  }
  
                  Status = AcpiExResolveNodeToValue (
                      ACPI_CAST_INDIRECT_PTR (
                          ACPI_NAMESPACE_NODE, &ReturnDesc),
                      WalkState);
                  goto Cleanup;
              }
          }
  
          /* Operand[0] may have changed from the code above */
  
          if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
          {
              /*
               * This is a DerefOf (ObjectReference)
               * Get the actual object from the Node (This is the dereference).
               * This case may only happen when a LocalX or ArgX is
               * dereferenced above, or for references to device and
               * thermal objects.
               */
              switch (((ACPI_NAMESPACE_NODE *) Operand[0])->Type)
              {
              case ACPI_TYPE_DEVICE:
              case ACPI_TYPE_THERMAL:
  
                  /* These types have no node subobject, return the NS node */
  
                  ReturnDesc = Operand[0];
                  break;
  
              default:
                  /* For most types, get the object attached to the node */
  
                  ReturnDesc = AcpiNsGetAttachedObject (
                      (ACPI_NAMESPACE_NODE *) Operand[0]);
                  AcpiUtAddReference (ReturnDesc);
                  break;
              }
          }
          else
          {
              /*
               * This must be a reference object produced by either the
               * Index() or RefOf() operator
               */
              switch (Operand[0]->Reference.Class)
              {
              case ACPI_REFCLASS_INDEX:
                  /*
                   * The target type for the Index operator must be
                   * either a Buffer or a Package
                   */
                  switch (Operand[0]->Reference.TargetType)
                  {
                  case ACPI_TYPE_BUFFER_FIELD:
  
                      TempDesc = Operand[0]->Reference.Object;
  
                      /*
                       * Create a new object that contains one element of the
                       * buffer -- the element pointed to by the index.
                       *
                       * NOTE: index into a buffer is NOT a pointer to a
                       * sub-buffer of the main buffer, it is only a pointer to a
                       * single element (byte) of the buffer!
                       *
                       * Since we are returning the value of the buffer at the
                       * indexed location, we don't need to add an additional
                       * reference to the buffer itself.
                       */
                      ReturnDesc = AcpiUtCreateIntegerObject ((UINT64)
                          TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]);
                      if (!ReturnDesc)
                      {
                          Status = AE_NO_MEMORY;
                          goto Cleanup;
                      }
                      break;
  
                  case ACPI_TYPE_PACKAGE:
                      /*
                       * Return the referenced element of the package. We must
                       * add another reference to the referenced object, however.
                       */
                      ReturnDesc = *(Operand[0]->Reference.Where);
                      if (!ReturnDesc)
                      {
                          /*
                           * Element is NULL, do not allow the dereference.
                           * This provides compatibility with other ACPI
                           * implementations.
                           */
                          return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT);
                      }
  
                      AcpiUtAddReference (ReturnDesc);
                      break;
  
                  default:
  
                      ACPI_ERROR ((AE_INFO,
                          "Unknown Index TargetType 0x%X in reference object %p",
                          Operand[0]->Reference.TargetType, Operand[0]));
  
                      Status = AE_AML_OPERAND_TYPE;
                      goto Cleanup;
                  }
                  break;
  
              case ACPI_REFCLASS_REFOF:
  
                  ReturnDesc = Operand[0]->Reference.Object;
  
                  if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) ==
                      ACPI_DESC_TYPE_NAMED)
                  {
                      ReturnDesc = AcpiNsGetAttachedObject (
                          (ACPI_NAMESPACE_NODE *) ReturnDesc);
                      if (!ReturnDesc)
                      {
                          break;
                      }
  
                     /*
                      * June 2013:
                      * BufferFields/FieldUnits require additional resolution
                      */
                      switch (ReturnDesc->Common.Type)
                      {
                      case ACPI_TYPE_BUFFER_FIELD:
                      case ACPI_TYPE_LOCAL_REGION_FIELD:
                      case ACPI_TYPE_LOCAL_BANK_FIELD:
                      case ACPI_TYPE_LOCAL_INDEX_FIELD:
  
                          Status = AcpiExReadDataFromField (
                              WalkState, ReturnDesc, &TempDesc);
                          if (ACPI_FAILURE (Status))
                          {
                              return_ACPI_STATUS (Status);
                          }
  
                          ReturnDesc = TempDesc;
                          break;
  
                      default:
  
                          /* Add another reference to the object */
  
                          AcpiUtAddReference (ReturnDesc);
                          break;
                      }
                  }
                  break;
  
              default:
  
                  ACPI_ERROR ((AE_INFO,
                      "Unknown class in reference(%p) - 0x%2.2X",
                      Operand[0], Operand[0]->Reference.Class));
  
                  Status = AE_TYPE;
                  goto Cleanup;
              }
          }
          break;
  
      default:
  
          ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
              WalkState->Opcode));
  
          Status = AE_AML_BAD_OPCODE;
          goto Cleanup;
      }
  
  
  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);
  }

Cache object: 955ea965239b4481a2bc060b05cb3912