926328c406
is Intel's reference implementation of the core operating-system ACPI support. (This import is on the vendor branch.)
524 lines
16 KiB
C
524 lines
16 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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* $Revision: 46 $
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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, Intel Corp. All rights
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* 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 "amlcode.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#include "actables.h"
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#define _COMPONENT NAMESPACE
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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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* 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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*
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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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OBJECT_TYPE_INTERNAL Type)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *PreviousObjDesc;
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OBJECT_TYPE_INTERNAL ObjType = ACPI_TYPE_ANY;
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UINT8 Flags;
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UINT16 Opcode;
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FUNCTION_TRACE ("NsAttachObject");
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/*
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* Parameter validation
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*/
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if (!AcpiGbl_RootNode)
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{
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/* Name space not initialized */
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REPORT_ERROR (("NsAttachObject: Namespace not initialized\n"));
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return_ACPI_STATUS (AE_NO_NAMESPACE);
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}
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if (!Node)
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{
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/* Invalid handle */
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REPORT_ERROR (("NsAttachObject: Null NamedObj handle\n"));
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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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REPORT_ERROR (("NsAttachObject: Null object, but type not ACPI_TYPE_ANY\n"));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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if (!VALID_DESCRIPTOR_TYPE (Node, ACPI_DESC_TYPE_NAMED))
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{
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/* Not a name handle */
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REPORT_ERROR (("NsAttachObject: Invalid handle\n"));
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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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DEBUG_PRINT (TRACE_EXEC,
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("NsAttachObject: 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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/* Get the current flags field of the Node */
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Flags = Node->Flags;
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Flags &= ~ANOBJ_AML_ATTACHMENT;
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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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ObjType = ACPI_TYPE_ANY;
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}
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/*
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* If the object is an 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 (VALID_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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ObjType = ((ACPI_NAMESPACE_NODE *) Object)->Type;
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/*
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* Copy appropriate flags
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*/
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if (((ACPI_NAMESPACE_NODE *) Object)->Flags & ANOBJ_AML_ATTACHMENT)
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{
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Flags |= ANOBJ_AML_ATTACHMENT;
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}
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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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/* If a valid type (non-ANY) was given, just use it */
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if (ACPI_TYPE_ANY != Type)
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{
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ObjType = Type;
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}
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/*
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* Type is TYPE_Any, we must try to determinte the
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* actual type of the object
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*/
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/*
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* Check if value points into the AML code
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*/
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else if (AcpiTbSystemTablePointer (Object))
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{
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/*
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* Object points into the AML stream.
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* Set a flag bit in the Node to indicate this
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*/
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Flags |= ANOBJ_AML_ATTACHMENT;
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/*
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* The next byte (perhaps the next two bytes)
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* will be the AML opcode
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*/
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MOVE_UNALIGNED16_TO_16 (&Opcode, Object);
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/* Check for a recognized OpCode */
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switch ((UINT8) Opcode)
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{
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case AML_OP_PREFIX:
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if (Opcode != AML_REVISION_OP)
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{
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/*
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* OpPrefix is unrecognized unless part
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* of RevisionOp
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*/
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break;
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}
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/* Else fall through to set type as Number */
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case AML_ZERO_OP: case AML_ONES_OP: case AML_ONE_OP:
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case AML_BYTE_OP: case AML_WORD_OP: case AML_DWORD_OP:
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ObjType = ACPI_TYPE_NUMBER;
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break;
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case AML_STRING_OP:
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ObjType = ACPI_TYPE_STRING;
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break;
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case AML_BUFFER_OP:
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ObjType = ACPI_TYPE_BUFFER;
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break;
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case AML_MUTEX_OP:
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ObjType = ACPI_TYPE_MUTEX;
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break;
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case AML_PACKAGE_OP:
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ObjType = ACPI_TYPE_PACKAGE;
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break;
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default:
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DEBUG_PRINT (ACPI_ERROR,
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("AML Opcode/Type [%x] not supported in attach\n",
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(UINT8) Opcode));
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return_ACPI_STATUS (AE_TYPE);
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break;
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}
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}
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else
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{
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/*
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* Cannot figure out the type -- set to DefAny which
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* will print as an error in the name table dump
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*/
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if (GetDebugLevel () > 0)
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{
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DUMP_PATHNAME (Node,
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"NsAttachObject confused: setting bogus type for ",
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ACPI_INFO, _COMPONENT);
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if (AcpiTbSystemTablePointer (Object))
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{
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DEBUG_PRINT (ACPI_INFO,
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("AML-stream code %02x\n", *(UINT8 *) Object));
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}
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else if (VALID_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_NAMED))
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{
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DUMP_PATHNAME (Object,
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"name ", ACPI_INFO,
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_COMPONENT);
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}
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else
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{
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DUMP_PATHNAME (Object, "object ",
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ACPI_INFO, _COMPONENT);
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DUMP_STACK_ENTRY (Object);
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}
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}
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ObjType = INTERNAL_TYPE_DEF_ANY;
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}
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}
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DEBUG_PRINT (TRACE_EXEC,
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("NsAttachObject: Installing obj %p into NameObj %p [%4.4s]\n",
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ObjDesc, Node, &Node->Name));
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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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AcpiCmAddReference (ObjDesc);
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/* Save the existing object (if any) for deletion later */
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PreviousObjDesc = Node->Object;
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/* Install the object and set the type, flags */
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Node->Object = ObjDesc;
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Node->Type = (UINT8) ObjType;
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Node->Flags |= Flags;
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/*
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* Delete an existing attached object.
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*/
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if (PreviousObjDesc)
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{
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/* One for the attach to the Node */
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AcpiCmRemoveReference (PreviousObjDesc);
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/* Now delete */
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AcpiCmRemoveReference (PreviousObjDesc);
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}
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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 - An object whose Value will be deleted
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete the Value associated with a namespace object. If the
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* Value is an allocated object, it is freed. Otherwise, the
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* 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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FUNCTION_TRACE ("NsDetachObject");
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ObjDesc = Node->Object;
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if (!ObjDesc)
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{
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return_VOID;
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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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/* Found a valid value */
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DEBUG_PRINT (ACPI_INFO,
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("NsDetachObject: Object=%p Value=%p Name %4.4s\n",
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Node, ObjDesc, &Node->Name));
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/*
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* Not every value is an object allocated via AcpiCmCallocate,
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* - must check
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*/
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if (!AcpiTbSystemTablePointer (ObjDesc))
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{
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/* Attempt to delete the object (and all subobjects) */
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AcpiCmRemoveReference (ObjDesc);
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}
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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: Handle - Parent Node to be examined
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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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******************************************************************************/
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void *
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AcpiNsGetAttachedObject (
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ACPI_HANDLE Handle)
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{
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FUNCTION_TRACE_PTR ("NsGetAttachedObject", Handle);
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if (!Handle)
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{
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/* handle invalid */
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REPORT_WARNING (("NsGetAttachedObject: Null handle\n"));
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return_PTR (NULL);
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}
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return_PTR (((ACPI_NAMESPACE_NODE *) Handle)->Object);
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}
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