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

 *

 * Module Name: uteval - Object evaluation

 *

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

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

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2010, 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 __UTEVAL_C__

#include "acpi.h"

#include "accommon.h"

#include "acnamesp.h"

#define _COMPONENT          ACPI_UTILITIES

        ACPI_MODULE_NAME    ("uteval")

/*

 * Strings supported by the _OSI predefined (internal) method.

 *

 * March 2009: Removed "Linux" as this host no longer wants to respond true

 * for this string. Basically, the only safe OS strings are windows-related

 * and in many or most cases represent the only test path within the

 * BIOS-provided ASL code.

 *

 * The second element of each entry is used to track the newest version of

 * Windows that the BIOS has requested.

 */

static const ACPI_INTERFACE_INFO    AcpiInterfacesSupported[] =

{

    /* Operating System Vendor Strings */

    {"Windows 2000",        ACPI_OSI_WIN_2000},         /* Windows 2000 */

    {"Windows 2001",        ACPI_OSI_WIN_XP},           /* Windows XP */

    {"Windows 2001 SP1",    ACPI_OSI_WIN_XP_SP1},       /* Windows XP SP1 */

    {"Windows 2001.1",      ACPI_OSI_WINSRV_2003},      /* Windows Server 2003 */

    {"Windows 2001 SP2",    ACPI_OSI_WIN_XP_SP2},       /* Windows XP SP2 */

    {"Windows 2001.1 SP1",  ACPI_OSI_WINSRV_2003_SP1},  /* Windows Server 2003 SP1 - Added 03/2006 */

    {"Windows 2006",        ACPI_OSI_WIN_VISTA},        /* Windows Vista - Added 03/2006 */

    {"Windows 2006.1",      ACPI_OSI_WINSRV_2008},      /* Windows Server 2008 - Added 09/2009 */

    {"Windows 2006 SP1",    ACPI_OSI_WIN_VISTA_SP1},    /* Windows Vista SP1 - Added 09/2009 */

    {"Windows 2009",        ACPI_OSI_WIN_7},            /* Windows 7 and Server 2008 R2 - Added 09/2009 */

    /* Feature Group Strings */

    {"Extended Address Space Descriptor", 0}

    /*

     * All "optional" feature group strings (features that are implemented

     * by the host) should be implemented in the host version of

     * AcpiOsValidateInterface and should not be added here.

     */

};

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

 *

 * FUNCTION:    AcpiUtOsiImplementation

 *

 * PARAMETERS:  WalkState           - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Implementation of the _OSI predefined control method

 *

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

ACPI_STATUS

AcpiUtOsiImplementation (

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *StringDesc;

    ACPI_OPERAND_OBJECT     *ReturnDesc;

    UINT32                  ReturnValue;

    UINT32                  i;

    ACPI_FUNCTION_TRACE (UtOsiImplementation);

    /* Validate the string input argument */

    StringDesc = WalkState->Arguments[0].Object;

    if (!StringDesc || (StringDesc->Common.Type != ACPI_TYPE_STRING))

    {

        return_ACPI_STATUS (AE_TYPE);

    }

    /* Create a return object */

    ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);

    if (!ReturnDesc)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    /* Default return value is 0, NOT SUPPORTED */

    ReturnValue = 0;

    /* Compare input string to static table of supported interfaces */

    for (i = 0; i < ACPI_ARRAY_LENGTH (AcpiInterfacesSupported); i++)

    {

        if (!ACPI_STRCMP (StringDesc->String.Pointer,

                AcpiInterfacesSupported[i].Name))

        {

            /*

             * The interface is supported.

             * Update the OsiData if necessary. We keep track of the latest

             * version of Windows that has been requested by the BIOS.

             */

            if (AcpiInterfacesSupported[i].Value > AcpiGbl_OsiData)

            {

                AcpiGbl_OsiData = AcpiInterfacesSupported[i].Value;

            }

            ReturnValue = ACPI_UINT32_MAX;

            goto Exit;

        }

    }

    /*

     * Did not match the string in the static table, call the host OSL to

     * check for a match with one of the optional strings (such as

     * "Module Device", "3.0 Thermal Model", etc.)

     */

    Status = AcpiOsValidateInterface (StringDesc->String.Pointer);

    if (ACPI_SUCCESS (Status))

    {

        /* The interface is supported */

        ReturnValue = ACPI_UINT32_MAX;

    }

Exit:

    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO,

        "ACPI: BIOS _OSI(%s) is %ssupported\n",

        StringDesc->String.Pointer, ReturnValue == 0 ? "not " : ""));

    /* Complete the return value */

    ReturnDesc->Integer.Value = ReturnValue;

    WalkState->ReturnDesc = ReturnDesc;

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiUtEvaluateObject

 *

 * PARAMETERS:  PrefixNode          - Starting node

 *              Path                - Path to object from starting node

 *              ExpectedReturnTypes - Bitmap of allowed return types

 *              ReturnDesc          - Where a return value is stored

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Evaluates a namespace object and verifies the type of the

 *              return object. Common code that simplifies accessing objects

 *              that have required return objects of fixed types.

 *

 *              NOTE: Internal function, no parameter validation

 *

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

ACPI_STATUS

AcpiUtEvaluateObject (

    ACPI_NAMESPACE_NODE     *PrefixNode,

    char                    *Path,

    UINT32                  ExpectedReturnBtypes,

    ACPI_OPERAND_OBJECT     **ReturnDesc)

{

    ACPI_EVALUATE_INFO      *Info;

    ACPI_STATUS             Status;

    UINT32                  ReturnBtype;

    ACPI_FUNCTION_TRACE (UtEvaluateObject);

    /* Allocate the evaluation information block */

    Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));

    if (!Info)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    Info->PrefixNode = PrefixNode;

    Info->Pathname = Path;

    /* Evaluate the object/method */

    Status = AcpiNsEvaluate (Info);

    if (ACPI_FAILURE (Status))

    {

        if (Status == AE_NOT_FOUND)

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",

                AcpiUtGetNodeName (PrefixNode), Path));

        }

        else

        {

            ACPI_ERROR_METHOD ("Method execution failed",

                PrefixNode, Path, Status);

        }

        goto Cleanup;

    }

    /* Did we get a return object? */

    if (!Info->ReturnObject)

    {

        if (ExpectedReturnBtypes)

        {

            ACPI_ERROR_METHOD ("No object was returned from",

                PrefixNode, Path, AE_NOT_EXIST);

            Status = AE_NOT_EXIST;

        }

        goto Cleanup;

    }

    /* Map the return object type to the bitmapped type */

    switch ((Info->ReturnObject)->Common.Type)

    {

    case ACPI_TYPE_INTEGER:

        ReturnBtype = ACPI_BTYPE_INTEGER;

        break;

    case ACPI_TYPE_BUFFER:

        ReturnBtype = ACPI_BTYPE_BUFFER;

        break;

    case ACPI_TYPE_STRING:

        ReturnBtype = ACPI_BTYPE_STRING;

        break;

    case ACPI_TYPE_PACKAGE:

        ReturnBtype = ACPI_BTYPE_PACKAGE;

        break;

    default:

        ReturnBtype = 0;

        break;

    }

    if ((AcpiGbl_EnableInterpreterSlack) &&

        (!ExpectedReturnBtypes))

    {

        /*

         * We received a return object, but one was not expected. This can

         * happen frequently if the "implicit return" feature is enabled.

         * Just delete the return object and return AE_OK.

         */

        AcpiUtRemoveReference (Info->ReturnObject);

        goto Cleanup;

    }

    /* Is the return object one of the expected types? */

    if (!(ExpectedReturnBtypes & ReturnBtype))

    {

        ACPI_ERROR_METHOD ("Return object type is incorrect",

            PrefixNode, Path, AE_TYPE);

        ACPI_ERROR ((AE_INFO,

            "Type returned from %s was incorrect: %s, expected Btypes: 0x%X",

            Path, AcpiUtGetObjectTypeName (Info->ReturnObject),

            ExpectedReturnBtypes));

        /* On error exit, we must delete the return object */

        AcpiUtRemoveReference (Info->ReturnObject);

        Status = AE_TYPE;

        goto Cleanup;

    }

    /* Object type is OK, return it */

    *ReturnDesc = Info->ReturnObject;

Cleanup:

    ACPI_FREE (Info);

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiUtEvaluateNumericObject

 *

 * PARAMETERS:  ObjectName          - Object name to be evaluated

 *              DeviceNode          - Node for the device

 *              Value               - Where the value is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Evaluates a numeric namespace object for a selected device

 *              and stores result in *Value.

 *

 *              NOTE: Internal function, no parameter validation

 *

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

ACPI_STATUS

AcpiUtEvaluateNumericObject (

    char                    *ObjectName,

    ACPI_NAMESPACE_NODE     *DeviceNode,

    UINT64                  *Value)

{

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (UtEvaluateNumericObject);

    Status = AcpiUtEvaluateObject (DeviceNode, ObjectName,

                ACPI_BTYPE_INTEGER, &ObjDesc);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Get the returned Integer */

    *Value = ObjDesc->Integer.Value;

    /* On exit, we must delete the return object */

    AcpiUtRemoveReference (ObjDesc);

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiUtExecute_STA

 *

 * PARAMETERS:  DeviceNode          - Node for the device

 *              Flags               - Where the status flags are returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Executes _STA for selected device and stores results in

 *              *Flags.

 *

 *              NOTE: Internal function, no parameter validation

 *

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

ACPI_STATUS

AcpiUtExecute_STA (

    ACPI_NAMESPACE_NODE     *DeviceNode,

    UINT32                  *Flags)

{

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (UtExecute_STA);

    Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA,

                ACPI_BTYPE_INTEGER, &ObjDesc);

    if (ACPI_FAILURE (Status))

    {

        if (AE_NOT_FOUND == Status)

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                "_STA on %4.4s was not found, assuming device is present\n",

                AcpiUtGetNodeName (DeviceNode)));

            *Flags = ACPI_UINT32_MAX;

            Status = AE_OK;

        }

        return_ACPI_STATUS (Status);

    }

    /* Extract the status flags */

    *Flags = (UINT32) ObjDesc->Integer.Value;

    /* On exit, we must delete the return object */

    AcpiUtRemoveReference (ObjDesc);

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiUtExecutePowerMethods

 *

 * PARAMETERS:  DeviceNode          - Node for the device

 *              MethodNames         - Array of power method names

 *              MethodCount         - Number of methods to execute

 *              OutValues           - Where the power method values are returned

 *

 * RETURN:      Status, OutValues

 *

 * DESCRIPTION: Executes the specified power methods for the device and returns

 *              the result(s).

 *

 *              NOTE: Internal function, no parameter validation

 *

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

ACPI_STATUS

AcpiUtExecutePowerMethods (

    ACPI_NAMESPACE_NODE     *DeviceNode,

    const char              **MethodNames,

    UINT8                   MethodCount,

    UINT8                   *OutValues)

{

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status;

    ACPI_STATUS             FinalStatus = AE_NOT_FOUND;

    UINT32                  i;

    ACPI_FUNCTION_TRACE (UtExecutePowerMethods);

    for (i = 0; i < MethodCount; i++)

    {

        /*

         * Execute the power method (_SxD or _SxW). The only allowable

         * return type is an Integer.

         */

        Status = AcpiUtEvaluateObject (DeviceNode,

                    ACPI_CAST_PTR (char, MethodNames[i]),

                    ACPI_BTYPE_INTEGER, &ObjDesc);

        if (ACPI_SUCCESS (Status))

        {

            OutValues[i] = (UINT8) ObjDesc->Integer.Value;

            /* Delete the return object */

            AcpiUtRemoveReference (ObjDesc);

            FinalStatus = AE_OK;            /* At least one value is valid */

            continue;

        }

        OutValues[i] = ACPI_UINT8_MAX;

        if (Status == AE_NOT_FOUND)

        {

            continue; /* Ignore if not found */

        }

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Failed %s on Device %4.4s, %s\n",

            ACPI_CAST_PTR (char, MethodNames[i]),

            AcpiUtGetNodeName (DeviceNode), AcpiFormatException (Status)));

    }

    return_ACPI_STATUS (FinalStatus);

}