C++ AcpiExEnterInterpreter函数代码示例

ACPI_STATUS
AcpiDsMethodError (
    ACPI_STATUS             Status,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_FUNCTION_ENTRY ();


    /* Ignore AE_OK and control exception codes */

    if (ACPI_SUCCESS (Status) ||
        (Status & AE_CODE_CONTROL))
    {
        return (Status);
    }

    /* Invoke the global exception handler */

    if (AcpiGbl_ExceptionHandler)
    {
        /* Exit the interpreter, allow handler to execute methods */

        AcpiExExitInterpreter ();

        /*
         * Handler can map the exception code to anything it wants, including
         * AE_OK, in which case the executing method will not be aborted.
         */
        Status = AcpiGbl_ExceptionHandler (Status,
                    WalkState->MethodNode ?
                        WalkState->MethodNode->Name.Integer : 0,
                    WalkState->Opcode, WalkState->AmlOffset, NULL);
        AcpiExEnterInterpreter ();
    }

    AcpiDsClearImplicitReturn (WalkState);

#ifdef ACPI_DISASSEMBLER
    if (ACPI_FAILURE (Status))
    {
        /* Display method locals/args if disassembler is present */

        AcpiDmDumpMethodInfo (Status, WalkState, WalkState->Op);
    }
#endif

    return (Status);
}

ACPI_STATUS
AcpiExSystemWaitMutex (
    ACPI_MUTEX              Mutex,
    UINT16                  Timeout)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (ExSystemWaitMutex);


    Status = AcpiOsAcquireMutex (Mutex, ACPI_DO_NOT_WAIT);
    if (ACPI_SUCCESS (Status))
    {
        return_ACPI_STATUS (Status);
    }

    if (Status == AE_TIME)
    {
        /* We must wait, so unlock the interpreter */

        AcpiExExitInterpreter ();

        Status = AcpiOsAcquireMutex (Mutex, Timeout);

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
            "*** Thread awake after blocking, %s\n",
            AcpiFormatException (Status)));

        /* Reacquire the interpreter */

        AcpiExEnterInterpreter ();
    }

    return_ACPI_STATUS (Status);
}

//.........这里部分代码省略.........

        Status = AE_TYPE;
        goto Cleanup;

    case ACPI_TYPE_METHOD:
        /*
         * 2) Object is a control method - execute it
         */

        /* Verify that there is a method object associated with this node */

        if (!Info->ObjDesc)
        {
            ACPI_ERROR ((AE_INFO, "%s: Method has no attached sub-object",
                Info->FullPathname));
            Status = AE_NULL_OBJECT;
            goto Cleanup;
        }

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
            "**** Execute method [%s] at AML address %p length %X\n",
            Info->FullPathname,
            Info->ObjDesc->Method.AmlStart + 1,
            Info->ObjDesc->Method.AmlLength - 1));

        /*
         * Any namespace deletion must acquire both the namespace and
         * interpreter locks to ensure that no thread is using the portion of
         * the namespace that is being deleted.
         *
         * Execute the method via the interpreter. The interpreter is locked
         * here before calling into the AML parser
         */
        AcpiExEnterInterpreter ();
        Status = AcpiPsExecuteMethod (Info);
        AcpiExExitInterpreter ();
        break;

    default:
        /*
         * 3) All other non-method objects -- get the current object value
         */

        /*
         * Some objects require additional resolution steps (e.g., the Node
         * may be a field that must be read, etc.) -- we can't just grab
         * the object out of the node.
         *
         * Use ResolveNodeToValue() to get the associated value.
         *
         * NOTE: we can get away with passing in NULL for a walk state because
         * the Node is guaranteed to not be a reference to either a method
         * local or a method argument (because this interface is never called
         * from a running method.)
         *
         * Even though we do not directly invoke the interpreter for object
         * resolution, we must lock it because we could access an OpRegion.
         * The OpRegion access code assumes that the interpreter is locked.
         */
        AcpiExEnterInterpreter ();

        /* TBD: ResolveNodeToValue has a strange interface, fix */

        Info->ReturnObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->Node);

        Status = AcpiExResolveNodeToValue (ACPI_CAST_INDIRECT_PTR (

ACPI_STATUS
AcpiNsLoadTable (
    UINT32                  TableIndex,
    ACPI_NAMESPACE_NODE     *Node)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (NsLoadTable);


    /* If table already loaded into namespace, just return */

    if (AcpiTbIsTableLoaded (TableIndex))
    {
        Status = AE_ALREADY_EXISTS;
        goto Unlock;
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "**** Loading table into namespace ****\n"));

    Status = AcpiTbAllocateOwnerId (TableIndex);
    if (ACPI_FAILURE (Status))
    {
        goto Unlock;
    }

    /*
     * Parse the table and load the namespace with all named
     * objects found within. Control methods are NOT parsed
     * at this time. In fact, the control methods cannot be
     * parsed until the entire namespace is loaded, because
     * if a control method makes a forward reference (call)
     * to another control method, we can't continue parsing
     * because we don't know how many arguments to parse next!
     */
    Status = AcpiNsParseTable (TableIndex, Node);
    if (ACPI_SUCCESS (Status))
    {
        AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
    }
    else
    {
        /*
         * On error, delete any namespace objects created by this table.
         * We cannot initialize these objects, so delete them. There are
         * a couple of expecially bad cases:
         * AE_ALREADY_EXISTS - namespace collision.
         * AE_NOT_FOUND - the target of a Scope operator does not
         * exist. This target of Scope must already exist in the
         * namespace, as per the ACPI specification.
         */
        AcpiNsDeleteNamespaceByOwner (
            AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);

        AcpiTbReleaseOwnerId (TableIndex);
        return_ACPI_STATUS (Status);
    }

Unlock:
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Now we can parse the control methods. We always parse
     * them here for a sanity check, and if configured for
     * just-in-time parsing, we delete the control method
     * parse trees.
     */
    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "**** Begin Table Object Initialization\n"));

    AcpiExEnterInterpreter ();
    Status = AcpiDsInitializeObjects (TableIndex, Node);
    AcpiExExitInterpreter ();

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "**** Completed Table Object Initialization\n"));

    /*
     * Execute any module-level code that was detected during the table load
     * phase. Although illegal since ACPI 2.0, there are many machines that
     * contain this type of code. Each block of detected executable AML code
     * outside of any control method is wrapped with a temporary control
     * method object and placed on a global list. The methods on this list
     * are executed below.
     *
     * This case executes the module-level code for each table immediately
     * after the table has been loaded. This provides compatibility with
     * other ACPI implementations. Optionally, the execution can be deferred
     * until later, see AcpiInitializeObjects.
     */
    if (!AcpiGbl_ParseTableAsTermList && !AcpiGbl_GroupModuleLevelCode)
    {
        AcpiNsExecModuleCodeList ();
    }

//.........这里部分代码省略.........

ACPI_STATUS
AcpiEvAddressSpaceDispatch (
    ACPI_OPERAND_OBJECT     *RegionObj,
    UINT32                  Function,
    UINT32                  RegionOffset,
    UINT32                  BitWidth,
    UINT64                  *Value)
{
    ACPI_STATUS             Status;
    ACPI_ADR_SPACE_HANDLER  Handler;
    ACPI_ADR_SPACE_SETUP    RegionSetup;
    ACPI_OPERAND_OBJECT     *HandlerDesc;
    ACPI_OPERAND_OBJECT     *RegionObj2;
    void                    *RegionContext = NULL;


    ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);


    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
    if (!RegionObj2)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    /* Ensure that there is a handler associated with this region */

    HandlerDesc = RegionObj->Region.Handler;
    if (!HandlerDesc)
    {
        ACPI_ERROR ((AE_INFO,
            "No handler for Region [%4.4s] (%p) [%s]",
            AcpiUtGetNodeName (RegionObj->Region.Node),
            RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));

        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    /*
     * It may be the case that the region has never been initialized.
     * Some types of regions require special init code
     */
    if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
    {
        /* This region has not been initialized yet, do it */

        RegionSetup = HandlerDesc->AddressSpace.Setup;
        if (!RegionSetup)
        {
            /* No initialization routine, exit with error */

            ACPI_ERROR ((AE_INFO,
                "No init routine for region(%p) [%s]",
                RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            return_ACPI_STATUS (AE_NOT_EXIST);
        }

        /*
         * We must exit the interpreter because the region setup will
         * potentially execute control methods (for example, the _REG method
         * for this region)
         */
        AcpiExExitInterpreter ();

        Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
                    HandlerDesc->AddressSpace.Context, &RegionContext);

        /* Re-enter the interpreter */

        AcpiExEnterInterpreter ();

        /* Check for failure of the Region Setup */

        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "During region initialization: [%s]",
                AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            return_ACPI_STATUS (Status);
        }

        /* Region initialization may have been completed by RegionSetup */

        if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
        {
            RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;

            if (RegionObj2->Extra.RegionContext)
            {
                /* The handler for this region was already installed */

                ACPI_FREE (RegionContext);
            }
            else
            {
                /*
                 * Save the returned context for use in all accesses to
                 * this particular region
                 */
                RegionObj2->Extra.RegionContext = RegionContext;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    /* Now we can evaluate the object */

    Status = AcpiNsEvaluate (Info);

    /*
     * If we are expecting a return value, and all went well above,
     * copy the return value to an external object.
     */
    if (ReturnBuffer)
    {
        if (!Info->ReturnObject)
        {
            ReturnBuffer->Length = 0;
        }
        else
        {
            if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
                ACPI_DESC_TYPE_NAMED)
            {
                /*
                 * If we received a NS Node as a return object, this means that
                 * the object we are evaluating has nothing interesting to
                 * return (such as a mutex, etc.)  We return an error because
                 * these types are essentially unsupported by this interface.
                 * We don't check up front because this makes it easier to add
                 * support for various types at a later date if necessary.
                 */
                Status = AE_TYPE;
                Info->ReturnObject = NULL;   /* No need to delete a NS Node */
                ReturnBuffer->Length = 0;
            }

            if (ACPI_SUCCESS (Status))
            {
                /* Dereference Index and RefOf references */

                AcpiNsResolveReferences (Info);

                /* Get the size of the returned object */

                Status = AcpiUtGetObjectSize (Info->ReturnObject,
                    &BufferSpaceNeeded);
                if (ACPI_SUCCESS (Status))
                {
                    /* Validate/Allocate/Clear caller buffer */

                    Status = AcpiUtInitializeBuffer (ReturnBuffer,
                        BufferSpaceNeeded);
                    if (ACPI_FAILURE (Status))
                    {
                        /*
                         * Caller's buffer is too small or a new one can't
                         * be allocated
                         */
                        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                            "Needed buffer size %X, %s\n",
                            (UINT32) BufferSpaceNeeded,
                            AcpiFormatException (Status)));
                    }
                    else
                    {
                        /* We have enough space for the object, build it */

                        Status = AcpiUtCopyIobjectToEobject (
                            Info->ReturnObject, ReturnBuffer);
                    }
                }
            }
        }
    }

    if (Info->ReturnObject)
    {
        /*
         * Delete the internal return object. NOTE: Interpreter must be
         * locked to avoid race condition.
         */
        AcpiExEnterInterpreter ();

        /* Remove one reference on the return object (should delete it) */

        AcpiUtRemoveReference (Info->ReturnObject);
        AcpiExExitInterpreter ();
    }


Cleanup:

    /* Free the input parameter list (if we created one) */

    if (Info->Parameters)
    {
        /* Free the allocated parameter block */

        AcpiUtDeleteInternalObjectList (Info->Parameters);
    }

    ACPI_FREE (Info);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiNsLoadTable (
    UINT32                  TableIndex,
    ACPI_NAMESPACE_NODE     *Node)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (NsLoadTable);


    /* If table already loaded into namespace, just return */

    if (AcpiTbIsTableLoaded (TableIndex))
    {
        Status = AE_ALREADY_EXISTS;
        goto Unlock;
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "**** Loading table into namespace ****\n"));

    Status = AcpiTbAllocateOwnerId (TableIndex);
    if (ACPI_FAILURE (Status))
    {
        goto Unlock;
    }

    /*
     * Parse the table and load the namespace with all named
     * objects found within. Control methods are NOT parsed
     * at this time. In fact, the control methods cannot be
     * parsed until the entire namespace is loaded, because
     * if a control method makes a forward reference (call)
     * to another control method, we can't continue parsing
     * because we don't know how many arguments to parse next!
     */
    Status = AcpiNsParseTable (TableIndex, Node);
    if (ACPI_SUCCESS (Status))
    {
        AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
    }
    else
    {
        /*
         * On error, delete any namespace objects created by this table.
         * We cannot initialize these objects, so delete them. There are
         * a couple of expecially bad cases:
         * AE_ALREADY_EXISTS - namespace collision.
         * AE_NOT_FOUND - the target of a Scope operator does not
         * exist. This target of Scope must already exist in the
         * namespace, as per the ACPI specification.
         */
        AcpiNsDeleteNamespaceByOwner (
            AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);

        AcpiTbReleaseOwnerId (TableIndex);
        return_ACPI_STATUS (Status);
    }

Unlock:
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Now we can parse the control methods. We always parse
     * them here for a sanity check, and if configured for
     * just-in-time parsing, we delete the control method
     * parse trees.
     */
    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "**** Begin Table Object Initialization\n"));

    AcpiExEnterInterpreter ();
    Status = AcpiDsInitializeObjects (TableIndex, Node);
    AcpiExExitInterpreter ();

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "**** Completed Table Object Initialization\n"));

    /*
     * This case handles the legacy option that groups all module-level
     * code blocks together and defers execution until all of the tables
     * are loaded. Execute all of these blocks at this time.
     * Execute any module-level code that was detected during the table
     * load phase.
     *
     * Note: this option is deprecated and will be eliminated in the
     * future. Use of this option can cause problems with AML code that
     * depends upon in-order immediate execution of module-level code.
     */
    AcpiNsExecModuleCodeList ();
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiEvAddressSpaceDispatch (
    ACPI_OPERAND_OBJECT     *RegionObj,
    ACPI_OPERAND_OBJECT     *FieldObj,
    UINT32                  Function,
    UINT32                  RegionOffset,
    UINT32                  BitWidth,
    UINT64                  *Value)
{
    ACPI_STATUS             Status;
    ACPI_ADR_SPACE_HANDLER  Handler;
    ACPI_ADR_SPACE_SETUP    RegionSetup;
    ACPI_OPERAND_OBJECT     *HandlerDesc;
    ACPI_OPERAND_OBJECT     *RegionObj2;
    void                    *RegionContext = NULL;
    ACPI_CONNECTION_INFO    *Context;
    ACPI_PHYSICAL_ADDRESS   Address;


    ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);


    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
    if (!RegionObj2)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    /* Ensure that there is a handler associated with this region */

    HandlerDesc = RegionObj->Region.Handler;
    if (!HandlerDesc)
    {
        ACPI_ERROR ((AE_INFO,
            "No handler for Region [%4.4s] (%p) [%s]",
            AcpiUtGetNodeName (RegionObj->Region.Node),
            RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));

        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    Context = HandlerDesc->AddressSpace.Context;

    /*
     * It may be the case that the region has never been initialized.
     * Some types of regions require special init code
     */
    if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
    {
        /* This region has not been initialized yet, do it */

        RegionSetup = HandlerDesc->AddressSpace.Setup;
        if (!RegionSetup)
        {
            /* No initialization routine, exit with error */

            ACPI_ERROR ((AE_INFO,
                "No init routine for region(%p) [%s]",
                RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            return_ACPI_STATUS (AE_NOT_EXIST);
        }

        /*
         * We must exit the interpreter because the region setup will
         * potentially execute control methods (for example, the _REG method
         * for this region)
         */
        AcpiExExitInterpreter ();

        Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
                    Context, &RegionContext);

        /* Re-enter the interpreter */

        AcpiExEnterInterpreter ();

        /* Check for failure of the Region Setup */

        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "During region initialization: [%s]",
                AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            return_ACPI_STATUS (Status);
        }

        /* Region initialization may have been completed by RegionSetup */

        if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
        {
            RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;

            /*
             * Save the returned context for use in all accesses to
             * the handler for this particular region
             */
            if (!(RegionObj2->Extra.RegionContext))
            {
                RegionObj2->Extra.RegionContext = RegionContext;
            }
//.........这里部分代码省略.........

ACPI_STATUS
AcpiEvInitializeRegion (
    ACPI_OPERAND_OBJECT     *RegionObj)
{
    ACPI_OPERAND_OBJECT     *HandlerObj;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_ADR_SPACE_TYPE     SpaceId;
    ACPI_NAMESPACE_NODE     *Node;


    ACPI_FUNCTION_TRACE (EvInitializeRegion);


    if (!RegionObj)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED)
    {
        return_ACPI_STATUS (AE_OK);
    }

    RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED;

    Node = RegionObj->Region.Node->Parent;
    SpaceId = RegionObj->Region.SpaceId;

    /*
     * The following loop depends upon the root Node having no parent
     * ie: AcpiGbl_RootNode->Parent being set to NULL
     */
    while (Node)
    {
        /* Check to see if a handler exists */

        HandlerObj = NULL;
        ObjDesc = AcpiNsGetAttachedObject (Node);
        if (ObjDesc)
        {
            /* Can only be a handler if the object exists */

            switch (Node->Type)
            {
            case ACPI_TYPE_DEVICE:
            case ACPI_TYPE_PROCESSOR:
            case ACPI_TYPE_THERMAL:

                HandlerObj = ObjDesc->CommonNotify.Handler;
                break;

            case ACPI_TYPE_METHOD:
                /*
                 * If we are executing module level code, the original
                 * Node's object was replaced by this Method object and we
                 * saved the handler in the method object.
                 *
                 * See AcpiNsExecModuleCode
                 */
                if (!AcpiGbl_ParseTableAsTermList &&
                    ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
                {
                    HandlerObj = ObjDesc->Method.Dispatch.Handler;
                }
                break;

            default:

                /* Ignore other objects */

                break;
            }

            HandlerObj = AcpiEvFindRegionHandler (SpaceId, HandlerObj);
            if (HandlerObj)
            {
                /* Found correct handler */

                ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
                    "Found handler %p for region %p in obj %p\n",
                    HandlerObj, RegionObj, ObjDesc));

                (void) AcpiEvAttachRegion (HandlerObj, RegionObj, FALSE);

                /*
                 * Tell all users that this region is usable by
                 * running the _REG method
                 */
                AcpiExExitInterpreter ();
                (void) AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT);
                AcpiExEnterInterpreter ();
                return_ACPI_STATUS (AE_OK);
            }
        }

        /* This node does not have the handler we need; Pop up one level */

        Node = Node->Parent;
    }

//.........这里部分代码省略.........

ACPI_STATUS
AcpiDsMethodError (
    ACPI_STATUS             Status,
    ACPI_WALK_STATE         *WalkState)
{
    UINT32                  AmlOffset;
    ACPI_NAME               Name = 0;


    ACPI_FUNCTION_ENTRY ();


    /* Ignore AE_OK and control exception codes */

    if (ACPI_SUCCESS (Status) ||
        (Status & AE_CODE_CONTROL))
    {
        return (Status);
    }

    /* Invoke the global exception handler */

    if (AcpiGbl_ExceptionHandler)
    {
        /* Exit the interpreter, allow handler to execute methods */

        AcpiExExitInterpreter ();

        /*
         * Handler can map the exception code to anything it wants, including
         * AE_OK, in which case the executing method will not be aborted.
         */
        AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->Aml,
            WalkState->ParserState.AmlStart);

        if (WalkState->MethodNode)
        {
            Name = WalkState->MethodNode->Name.Integer;
        }
        else if (WalkState->DeferredNode)
        {
            Name = WalkState->DeferredNode->Name.Integer;
        }

        Status = AcpiGbl_ExceptionHandler (Status, Name,
            WalkState->Opcode, AmlOffset, NULL);
        AcpiExEnterInterpreter ();
    }

    AcpiDsClearImplicitReturn (WalkState);

    if (ACPI_FAILURE (Status))
    {
        AcpiDsDumpMethodStack (Status, WalkState, WalkState->Op);

        /* Display method locals/args if debugger is present */

#ifdef ACPI_DEBUGGER
        AcpiDbDumpMethodInfo (Status, WalkState);
#endif
    }

    return (Status);
}

//.........这里部分代码省略.........
            return_ACPI_STATUS (AE_NULL_OBJECT);
        }

        /* Count the number of arguments being passed to the method */

        if (Info->Parameters)
        {
            while (Info->Parameters[Info->ParamCount])
            {
                if (Info->ParamCount > ACPI_METHOD_MAX_ARG)
                {
                    return_ACPI_STATUS (AE_LIMIT);
                }
                Info->ParamCount++;
            }
        }

        ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method",
            ACPI_LV_INFO, _COMPONENT);

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
            "Method at AML address %p Length %X\n",
            Info->ObjDesc->Method.AmlStart + 1,
            Info->ObjDesc->Method.AmlLength - 1));

        /*
         * Any namespace deletion must acquire both the namespace and
         * interpreter locks to ensure that no thread is using the portion of
         * the namespace that is being deleted.
         *
         * Execute the method via the interpreter. The interpreter is locked
         * here before calling into the AML parser
         */
        AcpiExEnterInterpreter ();
        Status = AcpiPsExecuteMethod (Info);
        AcpiExExitInterpreter ();
    }
    else
    {
        /*
         * 2) Object is not a method, return its current value
         *
         * Disallow certain object types. For these, "evaluation" is undefined.
         */
        switch (Info->ResolvedNode->Type)
        {
        case ACPI_TYPE_DEVICE:
        case ACPI_TYPE_EVENT:
        case ACPI_TYPE_MUTEX:
        case ACPI_TYPE_REGION:
        case ACPI_TYPE_THERMAL:
        case ACPI_TYPE_LOCAL_SCOPE:

            ACPI_ERROR ((AE_INFO,
                "[%4.4s] Evaluation of object type [%s] is not supported",
                Info->ResolvedNode->Name.Ascii,
                AcpiUtGetTypeName (Info->ResolvedNode->Type)));

            return_ACPI_STATUS (AE_TYPE);

        default:
            break;
        }

        /*
         * Objects require additional resolution steps (e.g., the Node may be

ACPI_STATUS
AcpiEvAddressSpaceDispatch (
    ACPI_OPERAND_OBJECT     *RegionObj,
    UINT32                  Function,
    ACPI_PHYSICAL_ADDRESS   Address,
    UINT32                  BitWidth,
    void                    *Value)
{
    ACPI_STATUS             Status;
    ACPI_STATUS             Status2;
    ACPI_ADR_SPACE_HANDLER  Handler;
    ACPI_ADR_SPACE_SETUP    RegionSetup;
    ACPI_OPERAND_OBJECT     *HandlerDesc;
    ACPI_OPERAND_OBJECT     *RegionObj2;
    void                    *RegionContext = NULL;


    ACPI_FUNCTION_TRACE ("EvAddressSpaceDispatch");


    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
    if (!RegionObj2)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    /*
     * Ensure that there is a handler associated with this region
     */
    HandlerDesc = RegionObj->Region.AddrHandler;
    if (!HandlerDesc)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "no handler for region(%p) [%s]\n",
            RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));

        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    /*
     * It may be the case that the region has never been initialized
     * Some types of regions require special init code
     */
    if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
    {
        /*
         * This region has not been initialized yet, do it
         */
        RegionSetup = HandlerDesc->AddrHandler.Setup;
        if (!RegionSetup)
        {
            /*
             *  Bad news, no init routine and not init'd
             */
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n",
                RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            return_ACPI_STATUS (AE_UNKNOWN_STATUS);
        }

        /*
         * We must exit the interpreter because the region setup will potentially
         * execute control methods
         */
        AcpiExExitInterpreter ();

        Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
                        HandlerDesc->AddrHandler.Context, &RegionContext);

        /* Re-enter the interpreter */

        Status2 = AcpiExEnterInterpreter ();
        if (ACPI_FAILURE (Status2))
        {
            return_ACPI_STATUS (Status2);
        }

        /*
         *  Init routine may fail
         */
        if (ACPI_FAILURE (Status))
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n",
                AcpiFormatException (Status),
                AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
            return_ACPI_STATUS (Status);
        }

        RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;

        /*
         *  Save the returned context for use in all accesses to
         *  this particular region.
         */
        RegionObj2->Extra.RegionContext = RegionContext;
    }

    /*
     *  We have everything we need, begin the process
     */
    Handler = HandlerDesc->AddrHandler.Handler;

//.........这里部分代码省略.........

void
AcpiEvUpdateGpes (
    ACPI_OWNER_ID           TableOwnerId)
{
    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo;
    ACPI_GPE_BLOCK_INFO     *GpeBlock;
    ACPI_GPE_WALK_INFO      WalkInfo;
    ACPI_STATUS             Status = AE_OK;
    UINT32                  NewWakeGpeCount = 0;


    /* We will examine only _PRW/_Lxx/_Exx methods owned by this table */

    WalkInfo.OwnerId = TableOwnerId;
    WalkInfo.ExecuteByOwnerId = TRUE;
    WalkInfo.Count = 0;

    if (AcpiGbl_LeaveWakeGpesDisabled)
    {
        /*
         * 1) Run any newly-loaded _PRW methods to find any GPEs that
         * can now be marked as CAN_WAKE GPEs. Note: We must run the
         * _PRW methods before we process the _Lxx/_Exx methods because
         * we will enable all runtime GPEs associated with the new
         * _Lxx/_Exx methods at the time we process those methods.
         *
         * Unlock interpreter so that we can run the _PRW methods.
         */
        WalkInfo.GpeBlock = NULL;
        WalkInfo.GpeDevice = NULL;

        AcpiExExitInterpreter ();

        Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
                    ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
                    AcpiEvMatchPrwAndGpe, NULL, &WalkInfo, NULL);
        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "While executing _PRW methods"));
        }

        AcpiExEnterInterpreter ();
        NewWakeGpeCount = WalkInfo.Count;
    }

    /*
     * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
     *
     * Any GPEs that correspond to new _Lxx/_Exx methods and are not
     * marked as CAN_WAKE are immediately enabled.
     *
     * Examine the namespace underneath each GpeDevice within the
     * GpeBlock lists.
     */
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return;
    }

    WalkInfo.Count = 0;
    WalkInfo.EnableThisGpe = TRUE;

    /* Walk the interrupt level descriptor list */

    GpeXruptInfo = AcpiGbl_GpeXruptListHead;
    while (GpeXruptInfo)
    {
        /* Walk all Gpe Blocks attached to this interrupt level */

        GpeBlock = GpeXruptInfo->GpeBlockListHead;
        while (GpeBlock)
        {
            WalkInfo.GpeBlock = GpeBlock;
            WalkInfo.GpeDevice = GpeBlock->Node;

            Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD,
                        WalkInfo.GpeDevice, ACPI_UINT32_MAX,
                        ACPI_NS_WALK_NO_UNLOCK, AcpiEvMatchGpeMethod,
                        NULL, &WalkInfo, NULL);
            if (ACPI_FAILURE (Status))
            {
                ACPI_EXCEPTION ((AE_INFO, Status,
                    "While decoding _Lxx/_Exx methods"));
            }

            GpeBlock = GpeBlock->Next;
        }

        GpeXruptInfo = GpeXruptInfo->Next;
    }

    if (WalkInfo.Count || NewWakeGpeCount)
    {
        ACPI_INFO ((AE_INFO,
            "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
            WalkInfo.Count, NewWakeGpeCount));
    }

//.........这里部分代码省略.........

//.........这里部分代码省略.........

        Status = AcpiNsEvaluate (Info);
    }

    /*
     * If we are expecting a return value, and all went well above,
     * copy the return value to an external object.
     */
    if (ReturnBuffer)
    {
        if (!Info->ReturnObject)
        {
            ReturnBuffer->Length = 0;
        }
        else
        {
            if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
                ACPI_DESC_TYPE_NAMED)
            {
                /*
                 * If we received a NS Node as a return object, this means that
                 * the object we are evaluating has nothing interesting to
                 * return (such as a mutex, etc.)  We return an error because
                 * these types are essentially unsupported by this interface.
                 * We don't check up front because this makes it easier to add
                 * support for various types at a later date if necessary.
                 */
                Status = AE_TYPE;
                Info->ReturnObject = NULL;   /* No need to delete a NS Node */
                ReturnBuffer->Length = 0;
            }

            if (ACPI_SUCCESS (Status))
            {
                /* Dereference Index and RefOf references */

                AcpiNsResolveReferences (Info);

                /* Get the size of the returned object */

                Status = AcpiUtGetObjectSize (Info->ReturnObject,
                            &BufferSpaceNeeded);
                if (ACPI_SUCCESS (Status))
                {
                    /* Validate/Allocate/Clear caller buffer */

                    Status = AcpiUtInitializeBuffer (ReturnBuffer,
                                BufferSpaceNeeded);
                    if (ACPI_FAILURE (Status))
                    {
                        /*
                         * Caller's buffer is too small or a new one can't
                         * be allocated
                         */
                        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                            "Needed buffer size %X, %s\n",
                            (UINT32) BufferSpaceNeeded,
                            AcpiFormatException (Status)));
                    }
                    else
                    {
                        /* We have enough space for the object, build it */

                        Status = AcpiUtCopyIobjectToEobject (Info->ReturnObject,
                                    ReturnBuffer);
                    }
                }
            }
        }
    }

    if (Info->ReturnObject)
    {
        /*
         * Delete the internal return object. NOTE: Interpreter must be
         * locked to avoid race condition.
         */
        AcpiExEnterInterpreter ();

        /* Remove one reference on the return object (should delete it) */

        AcpiUtRemoveReference (Info->ReturnObject);
        AcpiExExitInterpreter ();
    }


Cleanup:

    /* Free the input parameter list (if we created one) */

    if (Info->Parameters)
    {
        /* Free the allocated parameter block */

        AcpiUtDeleteInternalObjectList (Info->Parameters);
    }

    ACPI_FREE (Info);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiNsOneCompleteParse (
    UINT32                  PassNumber,
    UINT32                  TableIndex,
    ACPI_NAMESPACE_NODE     *StartNode)
{
    ACPI_PARSE_OBJECT       *ParseRoot;
    ACPI_STATUS             Status;
    UINT32                  AmlLength;
    UINT8                   *AmlStart;
    ACPI_WALK_STATE         *WalkState;
    ACPI_TABLE_HEADER       *Table;
    ACPI_OWNER_ID           OwnerId;


    ACPI_FUNCTION_TRACE (NsOneCompleteParse);


    Status = AcpiGetTableByIndex (TableIndex, &Table);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Table must consist of at least a complete header */

    if (Table->Length < sizeof (ACPI_TABLE_HEADER))
    {
        return_ACPI_STATUS (AE_BAD_HEADER);
    }

    AmlStart = (UINT8 *) Table + sizeof (ACPI_TABLE_HEADER);
    AmlLength = Table->Length - sizeof (ACPI_TABLE_HEADER);

    Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Create and init a Root Node */

    ParseRoot = AcpiPsCreateScopeOp (AmlStart);
    if (!ParseRoot)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (OwnerId, NULL, NULL, NULL);
    if (!WalkState)
    {
        AcpiPsFreeOp (ParseRoot);
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, ParseRoot, NULL,
        AmlStart, AmlLength, NULL, (UINT8) PassNumber);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    /* Found OSDT table, enable the namespace override feature */

    if (ACPI_COMPARE_NAME(Table->Signature, ACPI_SIG_OSDT) &&
        PassNumber == ACPI_IMODE_LOAD_PASS1)
    {
        WalkState->NamespaceOverride = TRUE;
    }

    /* StartNode is the default location to load the table  */

    if (StartNode && StartNode != AcpiGbl_RootNode)
    {
        Status = AcpiDsScopeStackPush (
            StartNode, ACPI_TYPE_METHOD, WalkState);
        if (ACPI_FAILURE (Status))
        {
            AcpiDsDeleteWalkState (WalkState);
            goto Cleanup;
        }
    }

    /* Parse the AML */

    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "*PARSE* pass %u parse\n", PassNumber));
    AcpiExEnterInterpreter ();
    Status = AcpiPsParseAml (WalkState);
    AcpiExExitInterpreter ();

Cleanup:
    AcpiPsDeleteParseTree (ParseRoot);
    return_ACPI_STATUS (Status);
}