627 lines
20 KiB
C
627 lines
20 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nseval - Object evaluation interfaces -- includes control
|
|
* method lookup and execution.
|
|
* $Revision: 109 $
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2002, 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 __NSEVAL_C__
|
|
|
|
#include "acpi.h"
|
|
#include "amlcode.h"
|
|
#include "acparser.h"
|
|
#include "acinterp.h"
|
|
#include "acnamesp.h"
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME ("nseval")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsEvaluateRelative
|
|
*
|
|
* PARAMETERS: Handle - The relative containing object
|
|
* *Pathname - Name of method to execute, If NULL, the
|
|
* handle is the object to execute
|
|
* **Params - List of parameters to pass to the method,
|
|
* terminated by NULL. Params itself may be
|
|
* NULL if no parameters are being passed.
|
|
* *ReturnObject - Where to put method's return value (if
|
|
* any). If NULL, no value is returned.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Find and execute the requested method using the handle as a
|
|
* scope
|
|
*
|
|
* MUTEX: Locks Namespace
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsEvaluateRelative (
|
|
ACPI_NAMESPACE_NODE *Handle,
|
|
NATIVE_CHAR *Pathname,
|
|
ACPI_OPERAND_OBJECT **Params,
|
|
ACPI_OPERAND_OBJECT **ReturnObject)
|
|
{
|
|
ACPI_NAMESPACE_NODE *PrefixNode;
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node = NULL;
|
|
NATIVE_CHAR *InternalPath = NULL;
|
|
ACPI_GENERIC_STATE ScopeInfo;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsEvaluateRelative");
|
|
|
|
|
|
/*
|
|
* Must have a valid object handle
|
|
*/
|
|
if (!Handle)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Build an internal name string for the method */
|
|
|
|
Status = AcpiNsInternalizeName (Pathname, &InternalPath);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Get the prefix handle and Node */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
PrefixNode = AcpiNsMapHandleToNode (Handle);
|
|
if (!PrefixNode)
|
|
{
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
Status = AE_BAD_PARAMETER;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Lookup the name in the namespace */
|
|
|
|
ScopeInfo.Scope.Node = PrefixNode;
|
|
Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY,
|
|
ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
|
|
&Node);
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Object [%s] not found [%s]\n",
|
|
Pathname, AcpiFormatException (Status)));
|
|
goto Cleanup;
|
|
}
|
|
|
|
/*
|
|
* Now that we have a handle to the object, we can attempt
|
|
* to evaluate it.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s [%p] Value %p\n",
|
|
Pathname, Node, AcpiNsGetAttachedObject (Node)));
|
|
|
|
Status = AcpiNsEvaluateByHandle (Node, Params, ReturnObject);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "*** Completed eval of object %s ***\n",
|
|
Pathname));
|
|
|
|
Cleanup:
|
|
|
|
ACPI_MEM_FREE (InternalPath);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsEvaluateByName
|
|
*
|
|
* PARAMETERS: Pathname - Fully qualified pathname to the object
|
|
* *ReturnObject - Where to put method's return value (if
|
|
* any). If NULL, no value is returned.
|
|
* **Params - List of parameters to pass to the method,
|
|
* terminated by NULL. Params itself may be
|
|
* NULL if no parameters are being passed.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Find and execute the requested method passing the given
|
|
* parameters
|
|
*
|
|
* MUTEX: Locks Namespace
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsEvaluateByName (
|
|
NATIVE_CHAR *Pathname,
|
|
ACPI_OPERAND_OBJECT **Params,
|
|
ACPI_OPERAND_OBJECT **ReturnObject)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node = NULL;
|
|
NATIVE_CHAR *InternalPath = NULL;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsEvaluateByName");
|
|
|
|
|
|
/* Build an internal name string for the method */
|
|
|
|
Status = AcpiNsInternalizeName (Pathname, &InternalPath);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Lookup the name in the namespace */
|
|
|
|
Status = AcpiNsLookup (NULL, InternalPath, ACPI_TYPE_ANY,
|
|
ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
|
|
&Node);
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Object at [%s] was not found, status=%.4X\n",
|
|
Pathname, Status));
|
|
goto Cleanup;
|
|
}
|
|
|
|
/*
|
|
* Now that we have a handle to the object, we can attempt
|
|
* to evaluate it.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s [%p] Value %p\n",
|
|
Pathname, Node, AcpiNsGetAttachedObject (Node)));
|
|
|
|
Status = AcpiNsEvaluateByHandle (Node, Params, ReturnObject);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "*** Completed eval of object %s ***\n",
|
|
Pathname));
|
|
|
|
|
|
Cleanup:
|
|
|
|
/* Cleanup */
|
|
|
|
if (InternalPath)
|
|
{
|
|
ACPI_MEM_FREE (InternalPath);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsEvaluateByHandle
|
|
*
|
|
* PARAMETERS: Handle - Method Node to execute
|
|
* **Params - List of parameters to pass to the method,
|
|
* terminated by NULL. Params itself may be
|
|
* NULL if no parameters are being passed.
|
|
* *ReturnObject - Where to put method's return value (if
|
|
* any). If NULL, no value is returned.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Execute the requested method passing the given parameters
|
|
*
|
|
* MUTEX: Locks Namespace
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsEvaluateByHandle (
|
|
ACPI_NAMESPACE_NODE *Handle,
|
|
ACPI_OPERAND_OBJECT **Params,
|
|
ACPI_OPERAND_OBJECT **ReturnObject)
|
|
{
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
ACPI_OPERAND_OBJECT *LocalReturnObject;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsEvaluateByHandle");
|
|
|
|
|
|
/* Check if namespace has been initialized */
|
|
|
|
if (!AcpiGbl_RootNode)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_NAMESPACE);
|
|
}
|
|
|
|
/* Parameter Validation */
|
|
|
|
if (!Handle)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (ReturnObject)
|
|
{
|
|
/* Initialize the return value to an invalid object */
|
|
|
|
*ReturnObject = NULL;
|
|
}
|
|
|
|
/* Get the prefix handle and Node */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Node = AcpiNsMapHandleToNode (Handle);
|
|
if (!Node)
|
|
{
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
|
|
/*
|
|
* Two major cases here:
|
|
* 1) The object is an actual control method -- execute it.
|
|
* 2) The object is not a method -- just return it's current
|
|
* value
|
|
*
|
|
* In both cases, the namespace is unlocked by the
|
|
* AcpiNs* procedure
|
|
*/
|
|
if (AcpiNsGetType (Node) == ACPI_TYPE_METHOD)
|
|
{
|
|
/*
|
|
* Case 1) We have an actual control method to execute
|
|
*/
|
|
Status = AcpiNsExecuteControlMethod (Node, Params,
|
|
&LocalReturnObject);
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* Case 2) Object is NOT a method, just return its
|
|
* current value
|
|
*/
|
|
Status = AcpiNsGetObjectValue (Node, &LocalReturnObject);
|
|
}
|
|
|
|
|
|
/*
|
|
* Check if there is a return value on the stack that must
|
|
* be dealt with
|
|
*/
|
|
if (Status == AE_CTRL_RETURN_VALUE)
|
|
{
|
|
/*
|
|
* If the Method returned a value and the caller
|
|
* provided a place to store a returned value, Copy
|
|
* the returned value to the object descriptor provided
|
|
* by the caller.
|
|
*/
|
|
if (ReturnObject)
|
|
{
|
|
/*
|
|
* Valid return object, copy the pointer to
|
|
* the returned object
|
|
*/
|
|
*ReturnObject = LocalReturnObject;
|
|
}
|
|
|
|
|
|
/* Map AE_RETURN_VALUE to AE_OK, we are done with it */
|
|
|
|
if (Status == AE_CTRL_RETURN_VALUE)
|
|
{
|
|
Status = AE_OK;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Namespace was unlocked by the handling AcpiNs* function,
|
|
* so we just return
|
|
*/
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsExecuteControlMethod
|
|
*
|
|
* PARAMETERS: MethodNode - The object/method
|
|
* **Params - List of parameters to pass to the method,
|
|
* terminated by NULL. Params itself may be
|
|
* NULL if no parameters are being passed.
|
|
* **ReturnObjDesc - List of result objects to be returned
|
|
* from the method.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Execute the requested method passing the given parameters
|
|
*
|
|
* MUTEX: Assumes namespace is locked
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsExecuteControlMethod (
|
|
ACPI_NAMESPACE_NODE *MethodNode,
|
|
ACPI_OPERAND_OBJECT **Params,
|
|
ACPI_OPERAND_OBJECT **ReturnObjDesc)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsExecuteControlMethod");
|
|
|
|
|
|
/* Verify that there is a method associated with this object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (MethodNode);
|
|
if (!ObjDesc)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No attached method object\n"));
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (AE_NULL_OBJECT);
|
|
}
|
|
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Control method at Offset %p Length %x]\n",
|
|
ObjDesc->Method.AmlStart + 1, ObjDesc->Method.AmlLength - 1));
|
|
|
|
ACPI_DUMP_PATHNAME (MethodNode, "NsExecuteControlMethod: Executing",
|
|
ACPI_LV_NAMES, _COMPONENT);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "At offset %p\n",
|
|
ObjDesc->Method.AmlStart + 1));
|
|
|
|
|
|
/*
|
|
* Unlock the namespace before execution. This allows namespace access
|
|
* via the external Acpi* interfaces while a method is being executed.
|
|
* However, 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.
|
|
*/
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Execute the method via the interpreter. The interpreter is locked
|
|
* here before calling into the AML parser
|
|
*/
|
|
Status = AcpiExEnterInterpreter ();
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiPsxExecute (MethodNode, Params, ReturnObjDesc);
|
|
AcpiExExitInterpreter ();
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetObjectValue
|
|
*
|
|
* PARAMETERS: Node - The object
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Return the current value of the object
|
|
*
|
|
* MUTEX: Assumes namespace is locked, leaves namespace unlocked
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsGetObjectValue (
|
|
ACPI_NAMESPACE_NODE *Node,
|
|
ACPI_OPERAND_OBJECT **ReturnObjDesc)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsGetObjectValue");
|
|
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
ObjDesc = (ACPI_OPERAND_OBJECT *) Node;
|
|
|
|
/*
|
|
* Use ResolveNodeToValue() to get the associated value. This call
|
|
* always deletes ObjDesc (allocated above).
|
|
*
|
|
* NOTE: we can get away with passing in NULL for a walk state
|
|
* because ObjDesc is guaranteed to not be a reference to either
|
|
* a method local or a method argument (because this interface can only be
|
|
* called from the AcpiEvaluate external interface, never called from
|
|
* a running control method.)
|
|
*
|
|
* Even though we do not directly invoke the interpreter
|
|
* for this, we must enter it because we could access an opregion.
|
|
* The opregion access code assumes that the interpreter
|
|
* is locked.
|
|
*
|
|
* We must release the namespace lock before entering the
|
|
* intepreter.
|
|
*/
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiExEnterInterpreter ();
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AcpiExResolveNodeToValue ((ACPI_NAMESPACE_NODE **) &ObjDesc, NULL);
|
|
/*
|
|
* If AcpiExResolveNodeToValue() succeeded, the return value was
|
|
* placed in ObjDesc.
|
|
*/
|
|
AcpiExExitInterpreter ();
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AE_CTRL_RETURN_VALUE;
|
|
*ReturnObjDesc = ObjDesc;
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Returning obj %p\n", *ReturnObjDesc));
|
|
}
|
|
}
|
|
|
|
/* Namespace is unlocked */
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|