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 /******************************************************************************
  *
  * Module Name: uteval - Object evaluation
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 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 __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 */
 
     /* 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: %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,
     ACPI_INTEGER            *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);
 }