286 lines
7.6 KiB
C
286 lines
7.6 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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* Copyright (C) 2000 - 2011, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define __NSXFOBJ_C__
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/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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