578 lines
18 KiB
C
578 lines
18 KiB
C
/*******************************************************************************
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*
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* Module Name: nsobject - Utilities for objects attached to namespace
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* table entries
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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 __NSOBJECT_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 ("nsobject")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsAttachObject
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*
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* PARAMETERS: Node - Parent Node
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* Object - Object to be attached
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* Type - Type of object, or ACPI_TYPE_ANY if not
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* known
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*
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* RETURN: Status
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*
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* DESCRIPTION: Record the given object as the value associated with the
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* name whose ACPI_HANDLE is passed. If Object is NULL
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* and Type is ACPI_TYPE_ANY, set the name as having no value.
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* Note: Future may require that the Node->Flags field be passed
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* as a parameter.
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*
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* MUTEX: Assumes namespace is locked
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsAttachObject (
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ACPI_NAMESPACE_NODE *Node,
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ACPI_OPERAND_OBJECT *Object,
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ACPI_OBJECT_TYPE Type)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *LastObjDesc;
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ACPI_OBJECT_TYPE ObjectType = ACPI_TYPE_ANY;
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ACPI_FUNCTION_TRACE (NsAttachObject);
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/*
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* Parameter validation
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*/
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if (!Node)
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{
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/* Invalid handle */
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ACPI_ERROR ((AE_INFO, "Null NamedObj handle"));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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if (!Object && (ACPI_TYPE_ANY != Type))
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{
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/* Null object */
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ACPI_ERROR ((AE_INFO,
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"Null object, but type not ACPI_TYPE_ANY"));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
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{
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/* Not a name handle */
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ACPI_ERROR ((AE_INFO, "Invalid handle %p [%s]",
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Node, AcpiUtGetDescriptorName (Node)));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Check if this object is already attached */
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if (Node->Object == Object)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Obj %p already installed in NameObj %p\n",
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Object, Node));
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return_ACPI_STATUS (AE_OK);
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}
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/* If null object, we will just install it */
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if (!Object)
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{
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ObjDesc = NULL;
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ObjectType = ACPI_TYPE_ANY;
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}
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/*
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* If the source object is a namespace Node with an attached object,
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* we will use that (attached) object
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*/
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else if ((ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED) &&
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((ACPI_NAMESPACE_NODE *) Object)->Object)
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{
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/*
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* Value passed is a name handle and that name has a
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* non-null value. Use that name's value and type.
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*/
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ObjDesc = ((ACPI_NAMESPACE_NODE *) Object)->Object;
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ObjectType = ((ACPI_NAMESPACE_NODE *) Object)->Type;
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}
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/*
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* Otherwise, we will use the parameter object, but we must type
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* it first
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*/
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else
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{
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ObjDesc = (ACPI_OPERAND_OBJECT *) Object;
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/* Use the given type */
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ObjectType = Type;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n",
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ObjDesc, Node, AcpiUtGetNodeName (Node)));
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/* Detach an existing attached object if present */
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if (Node->Object)
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{
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AcpiNsDetachObject (Node);
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}
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if (ObjDesc)
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{
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/*
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* Must increment the new value's reference count
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* (if it is an internal object)
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*/
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AcpiUtAddReference (ObjDesc);
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/*
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* Handle objects with multiple descriptors - walk
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* to the end of the descriptor list
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*/
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LastObjDesc = ObjDesc;
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while (LastObjDesc->Common.NextObject)
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{
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LastObjDesc = LastObjDesc->Common.NextObject;
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}
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/* Install the object at the front of the object list */
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LastObjDesc->Common.NextObject = Node->Object;
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}
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Node->Type = (UINT8) ObjectType;
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Node->Object = ObjDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDetachObject
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*
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* PARAMETERS: Node - A Namespace node whose object will be detached
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*
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* RETURN: None.
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*
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* DESCRIPTION: Detach/delete an object associated with a namespace node.
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* if the object is an allocated object, it is freed.
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* Otherwise, the field is simply cleared.
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*
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******************************************************************************/
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void
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AcpiNsDetachObject (
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_TRACE (NsDetachObject);
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ObjDesc = Node->Object;
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if (!ObjDesc ||
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(ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA))
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{
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return_VOID;
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}
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if (Node->Flags & ANOBJ_ALLOCATED_BUFFER)
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{
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/* Free the dynamic aml buffer */
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if (ObjDesc->Common.Type == ACPI_TYPE_METHOD)
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{
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ACPI_FREE (ObjDesc->Method.AmlStart);
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}
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}
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/* Clear the entry in all cases */
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Node->Object = NULL;
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if (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) == ACPI_DESC_TYPE_OPERAND)
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{
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Node->Object = ObjDesc->Common.NextObject;
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if (Node->Object &&
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((Node->Object)->Common.Type != ACPI_TYPE_LOCAL_DATA))
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{
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Node->Object = Node->Object->Common.NextObject;
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}
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}
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/* Reset the node type to untyped */
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Node->Type = ACPI_TYPE_ANY;
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Node %p [%4.4s] Object %p\n",
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Node, AcpiUtGetNodeName (Node), ObjDesc));
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/* Remove one reference on the object (and all subobjects) */
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AcpiUtRemoveReference (ObjDesc);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsGetAttachedObject
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*
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* PARAMETERS: Node - Namespace node
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*
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* RETURN: Current value of the object field from the Node whose
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* handle is passed
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*
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* DESCRIPTION: Obtain the object attached to a namespace node.
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiNsGetAttachedObject (
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_FUNCTION_TRACE_PTR (NsGetAttachedObject, Node);
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if (!Node)
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{
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ACPI_WARNING ((AE_INFO, "Null Node ptr"));
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return_PTR (NULL);
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}
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if (!Node->Object ||
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((ACPI_GET_DESCRIPTOR_TYPE (Node->Object) != ACPI_DESC_TYPE_OPERAND) &&
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(ACPI_GET_DESCRIPTOR_TYPE (Node->Object) != ACPI_DESC_TYPE_NAMED)) ||
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((Node->Object)->Common.Type == ACPI_TYPE_LOCAL_DATA))
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{
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return_PTR (NULL);
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}
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return_PTR (Node->Object);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsGetSecondaryObject
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*
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* PARAMETERS: Node - Namespace node
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*
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* RETURN: Current value of the object field from the Node whose
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* handle is passed.
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*
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* DESCRIPTION: Obtain a secondary object associated with a namespace node.
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*
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******************************************************************************/
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ACPI_OPERAND_OBJECT *
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AcpiNsGetSecondaryObject (
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_FUNCTION_TRACE_PTR (NsGetSecondaryObject, ObjDesc);
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if ((!ObjDesc) ||
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(ObjDesc->Common.Type== ACPI_TYPE_LOCAL_DATA) ||
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(!ObjDesc->Common.NextObject) ||
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((ObjDesc->Common.NextObject)->Common.Type == ACPI_TYPE_LOCAL_DATA))
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{
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return_PTR (NULL);
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}
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return_PTR (ObjDesc->Common.NextObject);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsAttachData
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*
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* PARAMETERS: Node - Namespace node
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* Handler - Handler to be associated with the data
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* Data - Data to be attached
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*
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* RETURN: Status
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*
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* DESCRIPTION: Low-level attach data. Create and attach a Data object.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsAttachData (
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ACPI_NAMESPACE_NODE *Node,
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ACPI_OBJECT_HANDLER Handler,
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void *Data)
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{
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ACPI_OPERAND_OBJECT *PrevObjDesc;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *DataDesc;
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/* We only allow one attachment per handler */
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PrevObjDesc = NULL;
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ObjDesc = Node->Object;
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while (ObjDesc)
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{
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if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
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(ObjDesc->Data.Handler == Handler))
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{
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return (AE_ALREADY_EXISTS);
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}
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PrevObjDesc = ObjDesc;
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ObjDesc = ObjDesc->Common.NextObject;
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}
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/* Create an internal object for the data */
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DataDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_DATA);
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if (!DataDesc)
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{
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return (AE_NO_MEMORY);
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}
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DataDesc->Data.Handler = Handler;
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DataDesc->Data.Pointer = Data;
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/* Install the data object */
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if (PrevObjDesc)
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{
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PrevObjDesc->Common.NextObject = DataDesc;
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}
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else
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{
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Node->Object = DataDesc;
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDetachData
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*
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* PARAMETERS: Node - Namespace node
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* Handler - Handler associated with the data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Low-level detach data. Delete the data node, but the caller
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* is responsible for the actual data.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsDetachData (
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ACPI_NAMESPACE_NODE *Node,
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ACPI_OBJECT_HANDLER Handler)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *PrevObjDesc;
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PrevObjDesc = NULL;
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ObjDesc = Node->Object;
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while (ObjDesc)
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{
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if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
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(ObjDesc->Data.Handler == Handler))
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{
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if (PrevObjDesc)
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{
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PrevObjDesc->Common.NextObject = ObjDesc->Common.NextObject;
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}
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else
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{
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Node->Object = ObjDesc->Common.NextObject;
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}
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AcpiUtRemoveReference (ObjDesc);
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return (AE_OK);
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}
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PrevObjDesc = ObjDesc;
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ObjDesc = ObjDesc->Common.NextObject;
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}
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return (AE_NOT_FOUND);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsGetAttachedData
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*
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* PARAMETERS: Node - Namespace node
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* Handler - Handler associated with the data
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* Data - Where the data is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Low level interface to obtain data previously associated with
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* a namespace node.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsGetAttachedData (
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ACPI_NAMESPACE_NODE *Node,
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ACPI_OBJECT_HANDLER Handler,
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void **Data)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ObjDesc = Node->Object;
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while (ObjDesc)
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{
|
|
if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
|
|
(ObjDesc->Data.Handler == Handler))
|
|
{
|
|
*Data = ObjDesc->Data.Pointer;
|
|
return (AE_OK);
|
|
}
|
|
|
|
ObjDesc = ObjDesc->Common.NextObject;
|
|
}
|
|
|
|
return (AE_NOT_FOUND);
|
|
}
|
|
|
|
|