358 lines
12 KiB
C
358 lines
12 KiB
C
/*******************************************************************************
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*
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* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
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* ACPI Object oriented interfaces
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*
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******************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __NSXFOBJ_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsxfobj")
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetType
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*
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* PARAMETERS: Handle - Handle of object whose type is desired
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* RetType - Where the type will be placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine returns the type associatd with a particular handle
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetType (
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ACPI_HANDLE Handle,
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ACPI_OBJECT_TYPE *RetType)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status;
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/* Parameter Validation */
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if (!RetType)
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{
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return (AE_BAD_PARAMETER);
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}
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/*
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* Special case for the predefined Root Node
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* (return type ANY)
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*/
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if (Handle == ACPI_ROOT_OBJECT)
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{
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*RetType = ACPI_TYPE_ANY;
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return (AE_OK);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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/* Convert and validate the handle */
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Node = AcpiNsValidateHandle (Handle);
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if (!Node)
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{
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return (AE_BAD_PARAMETER);
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}
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*RetType = Node->Type;
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Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetType)
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetParent
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*
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* PARAMETERS: Handle - Handle of object whose parent is desired
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* RetHandle - Where the parent handle will be placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Returns a handle to the parent of the object represented by
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* Handle.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetParent (
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ACPI_HANDLE Handle,
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ACPI_HANDLE *RetHandle)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_NAMESPACE_NODE *ParentNode;
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ACPI_STATUS Status;
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if (!RetHandle)
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{
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return (AE_BAD_PARAMETER);
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}
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/* Special case for the predefined Root Node (no parent) */
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if (Handle == ACPI_ROOT_OBJECT)
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{
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return (AE_NULL_ENTRY);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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/* Convert and validate the handle */
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Node = AcpiNsValidateHandle (Handle);
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if (!Node)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Get the parent entry */
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ParentNode = Node->Parent;
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*RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, ParentNode);
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/* Return exception if parent is null */
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if (!ParentNode)
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{
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Status = AE_NULL_ENTRY;
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}
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetParent)
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetNextObject
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*
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* PARAMETERS: Type - Type of object to be searched for
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* Parent - Parent object whose children we are getting
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* LastChild - Previous child that was found.
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* The NEXT child will be returned
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* RetHandle - Where handle to the next object is placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the next peer object within the namespace. If Handle is
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* valid, Scope is ignored. Otherwise, the first object within
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* Scope is returned.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetNextObject (
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ACPI_OBJECT_TYPE Type,
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ACPI_HANDLE Parent,
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ACPI_HANDLE Child,
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ACPI_HANDLE *RetHandle)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_NAMESPACE_NODE *ParentNode = NULL;
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ACPI_NAMESPACE_NODE *ChildNode = NULL;
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/* Parameter validation */
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if (Type > ACPI_TYPE_EXTERNAL_MAX)
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{
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return (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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/* If null handle, use the parent */
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if (!Child)
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{
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/* Start search at the beginning of the specified scope */
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ParentNode = AcpiNsValidateHandle (Parent);
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if (!ParentNode)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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}
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else
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{
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/* Non-null handle, ignore the parent */
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/* Convert and validate the handle */
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ChildNode = AcpiNsValidateHandle (Child);
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if (!ChildNode)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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}
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/* Internal function does the real work */
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Node = AcpiNsGetNextNodeTyped (Type, ParentNode, ChildNode);
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if (!Node)
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{
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Status = AE_NOT_FOUND;
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goto UnlockAndExit;
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}
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if (RetHandle)
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{
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*RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node);
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}
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetNextObject)
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