FreeBSD/Linux Kernel Cross Reference
sys/intel/io/acpica/utilities/uteval.c

     /******************************************************************************
      *
      * 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 */
       {"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: %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);
   }

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