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 *

 * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes

 *

 *****************************************************************************/

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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

 * 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.

 *

 *****************************************************************************/

#include "accommon.h"

#include "acinterp.h"

#include "amlcode.h"

#include "amlresrc.h"

        ACPI_MODULE_NAME    ("exmisc")

 *

 * FUNCTION:    AcpiExGetObjectReference

 *

 * PARAMETERS:  ObjDesc             - Create a reference to this object

 *              ReturnDesc          - Where to store the reference

 *              WalkState           - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Obtain and return a "reference" to the target object

 *              Common code for the RefOfOp and the CondRefOfOp.

 *

 ******************************************************************************/

AcpiExGetObjectReference (

    ACPI_OPERAND_OBJECT     *ObjDesc,

    ACPI_OPERAND_OBJECT     **ReturnDesc,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_OPERAND_OBJECT     *ReferenceObj;

    ACPI_OPERAND_OBJECT     *ReferencedObj;

    {

    case ACPI_DESC_TYPE_OPERAND:

        {

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

        }

         * Must be a reference to a Local or Arg

         */

        switch (ObjDesc->Reference.Class)

        {

        case ACPI_REFCLASS_LOCAL:

        case ACPI_REFCLASS_ARG:

        case ACPI_REFCLASS_DEBUG:

            break;

                ObjDesc->Reference.Class));

            return_ACPI_STATUS (AE_AML_INTERNAL);

        }

        break;

         * A named reference that has already been resolved to a Node

         */

        ReferencedObj = ObjDesc;

        break;

            ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)));

        return_ACPI_STATUS (AE_TYPE);

    }

    if (!ReferenceObj)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    ReferenceObj->Reference.Object = ReferencedObj;

    *ReturnDesc = ReferenceObj;

        "Object %p Type [%s], returning Reference %p\n",

        ObjDesc, AcpiUtGetObjectTypeName (ObjDesc), *ReturnDesc));

}

 *

 * FUNCTION:    AcpiExConcatTemplate

 *

 * PARAMETERS:  Operand0            - First source object

 *              Operand1            - Second source object

 *              ActualReturnDesc    - Where to place the return object

 *              WalkState           - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Concatenate two resource templates

 *

 ******************************************************************************/

AcpiExConcatTemplate (

    ACPI_OPERAND_OBJECT     *Operand0,

    ACPI_OPERAND_OBJECT     *Operand1,

    ACPI_OPERAND_OBJECT     **ActualReturnDesc,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ReturnDesc;

    UINT8                   *NewBuf;

    UINT8                   *EndTag;

    ACPI_SIZE               Length0;

    ACPI_SIZE               Length1;

    ACPI_SIZE               NewLength;

     * Find the EndTag descriptor in each resource template.

     * Note1: returned pointers point TO the EndTag, not past it.

     * Note2: zero-length buffers are allowed; treated like one EndTag

     */

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    if (!ReturnDesc)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

     * Copy the templates to the new buffer, 0 first, then 1 follows. One

     * EndTag descriptor is copied from Operand1.

     */

    NewBuf = ReturnDesc->Buffer.Pointer;

    ACPI_MEMCPY (NewBuf, Operand0->Buffer.Pointer, Length0);

    ACPI_MEMCPY (NewBuf + Length0, Operand1->Buffer.Pointer, Length1);

    NewBuf[NewLength - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;

    return_ACPI_STATUS (AE_OK);

}

 *

 * FUNCTION:    AcpiExDoConcatenate

 *

 * PARAMETERS:  Operand0            - First source object

 *              Operand1            - Second source object

 *              ActualReturnDesc    - Where to place the return object

 *              WalkState           - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Concatenate two objects OF THE SAME TYPE.

 *

 ******************************************************************************/

AcpiExDoConcatenate (

    ACPI_OPERAND_OBJECT     *Operand0,

    ACPI_OPERAND_OBJECT     *Operand1,

    ACPI_OPERAND_OBJECT     **ActualReturnDesc,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_OPERAND_OBJECT     *LocalOperand1 = Operand1;

    ACPI_OPERAND_OBJECT     *ReturnDesc;

    char                    *NewBuf;

    ACPI_STATUS             Status;

     * Convert the second operand if necessary.  The first operand

     * determines the type of the second operand, (See the Data Types

     * section of the ACPI specification.)  Both object types are

     * guaranteed to be either Integer/String/Buffer by the operand

     * resolution mechanism.

     */

    switch (Operand0->Common.Type)

    {

    case ACPI_TYPE_INTEGER:

        Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16);

        break;

        Status = AcpiExConvertToString (Operand1, &LocalOperand1,

                    ACPI_IMPLICIT_CONVERT_HEX);

        break;

        Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1);

        break;

        ACPI_ERROR ((AE_INFO, "Invalid object type: 0x%X",

            Operand0->Common.Type));

        Status = AE_AML_INTERNAL;

    }

    {

        goto Cleanup;

    }

     * Both operands are now known to be the same object type

     * (Both are Integer, String, or Buffer), and we can now perform the

     * concatenation.

     */

     * There are three cases to handle:

     *

     * 1) Two Integers concatenated to produce a new Buffer

     * 2) Two Strings concatenated to produce a new String

     * 3) Two Buffers concatenated to produce a new Buffer

     */

    switch (Operand0->Common.Type)

    {

    case ACPI_TYPE_INTEGER:

        /* Need enough buffer space for two integers */

                            ACPI_MUL_2 (AcpiGbl_IntegerByteWidth));

        if (!ReturnDesc)

        {

            Status = AE_NO_MEMORY;

            goto Cleanup;

        }

                        AcpiGbl_IntegerByteWidth);

                        &LocalOperand1->Integer.Value,

                        AcpiGbl_IntegerByteWidth);

        break;

                        ((ACPI_SIZE) Operand0->String.Length +

                        LocalOperand1->String.Length));

        if (!ReturnDesc)

        {

            Status = AE_NO_MEMORY;

            goto Cleanup;

        }

        ACPI_STRCPY (NewBuf + Operand0->String.Length,

                        LocalOperand1->String.Pointer);

        break;

                        ((ACPI_SIZE) Operand0->Buffer.Length +

                        LocalOperand1->Buffer.Length));

        if (!ReturnDesc)

        {

            Status = AE_NO_MEMORY;

            goto Cleanup;

        }

                        Operand0->Buffer.Length);

        ACPI_MEMCPY (NewBuf + Operand0->Buffer.Length,

                        LocalOperand1->Buffer.Pointer,

                        LocalOperand1->Buffer.Length);

        break;

            Operand0->Common.Type));

        Status =AE_AML_INTERNAL;

        goto Cleanup;

    }

    if (LocalOperand1 != Operand1)

    {

        AcpiUtRemoveReference (LocalOperand1);

    }

    return_ACPI_STATUS (Status);

}

 *

 * FUNCTION:    AcpiExDoMathOp

 *

 * PARAMETERS:  Opcode              - AML opcode

 *              Integer0            - Integer operand #0

 *              Integer1            - Integer operand #1

 *

 * RETURN:      Integer result of the operation

 *

 * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the

 *              math functions here is to prevent a lot of pointer dereferencing

 *              to obtain the operands.

 *

 ******************************************************************************/

AcpiExDoMathOp (

    UINT16                  Opcode,

    UINT64                  Integer0,

    UINT64                  Integer1)

{

    {

    case AML_ADD_OP:                /* Add (Integer0, Integer1, Result) */

         * We need to check if the shiftcount is larger than the integer bit

         * width since the behavior of this is not well-defined in the C language.

         */

        if (Integer1 >= AcpiGbl_IntegerBitWidth)

        {

            return (0);

        }

        return (Integer0 << Integer1);

         * We need to check if the shiftcount is larger than the integer bit

         * width since the behavior of this is not well-defined in the C language.

         */

        if (Integer1 >= AcpiGbl_IntegerBitWidth)

        {

            return (0);

        }

        return (Integer0 >> Integer1);

    }

}

 *

 * FUNCTION:    AcpiExDoLogicalNumericOp

 *

 * PARAMETERS:  Opcode              - AML opcode

 *              Integer0            - Integer operand #0

 *              Integer1            - Integer operand #1

 *              LogicalResult       - TRUE/FALSE result of the operation

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric

 *              operators (LAnd and LOr), both operands must be integers.

 *

 *              Note: cleanest machine code seems to be produced by the code

 *              below, rather than using statements of the form:

 *                  Result = (Integer0 && Integer1);

 *

 ******************************************************************************/

AcpiExDoLogicalNumericOp (

    UINT16                  Opcode,

    UINT64                  Integer0,

    UINT64                  Integer1,

    BOOLEAN                 *LogicalResult)

{

    ACPI_STATUS             Status = AE_OK;

    BOOLEAN                 LocalResult = FALSE;

    {

    case AML_LAND_OP:               /* LAnd (Integer0, Integer1) */

        {

            LocalResult = TRUE;

        }

        break;

        {

            LocalResult = TRUE;

        }

        break;

        Status = AE_AML_INTERNAL;

        break;

    }

    return_ACPI_STATUS (Status);

}

 *

 * FUNCTION:    AcpiExDoLogicalOp

 *

 * PARAMETERS:  Opcode              - AML opcode

 *              Operand0            - operand #0

 *              Operand1            - operand #1

 *              LogicalResult       - TRUE/FALSE result of the operation

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the

 *              functions here is to prevent a lot of pointer dereferencing

 *              to obtain the operands and to simplify the generation of the

 *              logical value. For the Numeric operators (LAnd and LOr), both

 *              operands must be integers. For the other logical operators,

 *              operands can be any combination of Integer/String/Buffer. The

 *              first operand determines the type to which the second operand

 *              will be converted.

 *

 *              Note: cleanest machine code seems to be produced by the code

 *              below, rather than using statements of the form:

 *                  Result = (Operand0 == Operand1);

 *

 ******************************************************************************/

AcpiExDoLogicalOp (

    UINT16                  Opcode,

    ACPI_OPERAND_OBJECT     *Operand0,

    ACPI_OPERAND_OBJECT     *Operand1,

    BOOLEAN                 *LogicalResult)

{

    ACPI_OPERAND_OBJECT     *LocalOperand1 = Operand1;

    UINT64                  Integer0;

    UINT64                  Integer1;

    UINT32                  Length0;

    UINT32                  Length1;

    ACPI_STATUS             Status = AE_OK;

    BOOLEAN                 LocalResult = FALSE;

    int                     Compare;

     * Convert the second operand if necessary.  The first operand

     * determines the type of the second operand, (See the Data Types

     * section of the ACPI 3.0+ specification.)  Both object types are

     * guaranteed to be either Integer/String/Buffer by the operand

     * resolution mechanism.

     */

    switch (Operand0->Common.Type)

    {

    case ACPI_TYPE_INTEGER:

        Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16);

        break;

        Status = AcpiExConvertToString (Operand1, &LocalOperand1,

                    ACPI_IMPLICIT_CONVERT_HEX);

        break;

        Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1);

        break;

        Status = AE_AML_INTERNAL;

        break;

    }

    {

        goto Cleanup;

    }

     * Two cases: 1) Both Integers, 2) Both Strings or Buffers

     */

    if (Operand0->Common.Type == ACPI_TYPE_INTEGER)

    {

        /*

         * 1) Both operands are of type integer

         *    Note: LocalOperand1 may have changed above

         */

        Integer0 = Operand0->Integer.Value;

        Integer1 = LocalOperand1->Integer.Value;

        {

        case AML_LEQUAL_OP:             /* LEqual (Operand0, Operand1) */

            {

                LocalResult = TRUE;

            }

            break;

            {

                LocalResult = TRUE;

            }

            break;

            {

                LocalResult = TRUE;

            }

            break;

            Status = AE_AML_INTERNAL;

            break;

        }

    }

    else

    {

        /*

         * 2) Both operands are Strings or both are Buffers

         *    Note: Code below takes advantage of common Buffer/String

         *          object fields. LocalOperand1 may have changed above. Use

         *          memcmp to handle nulls in buffers.

         */

        Length0 = Operand0->Buffer.Length;

        Length1 = LocalOperand1->Buffer.Length;

                    LocalOperand1->Buffer.Pointer,

                    (Length0 > Length1) ? Length1 : Length0);

        {

        case AML_LEQUAL_OP:             /* LEqual (Operand0, Operand1) */

                (Compare == 0))

            {

                /* Length and all bytes match ==> TRUE */

            }

            break;

            {

                LocalResult = TRUE;

                goto Cleanup;   /* TRUE */

            }

            if (Compare < 0)

            {

                goto Cleanup;   /* FALSE */

            }

            {

                LocalResult = TRUE;

            }

            break;

            {

                goto Cleanup;   /* FALSE */

            }

            if (Compare < 0)

            {

                LocalResult = TRUE;

                goto Cleanup;   /* TRUE */

            }

            {

                LocalResult = TRUE;

            }

            break;

            Status = AE_AML_INTERNAL;

            break;

        }

    }

    {

        AcpiUtRemoveReference (LocalOperand1);

    }

    return_ACPI_STATUS (Status);

}