375 lines
13 KiB
C
375 lines
13 KiB
C
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/******************************************************************************
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*
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* Module Name: exresnte - AML Interpreter object resolution
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* $Revision: 65 $
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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 - 2004, 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 __EXRESNTE_C__
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#include "acpi.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acparser.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exresnte")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExResolveNodeToValue
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*
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* PARAMETERS: ObjectPtr - Pointer to a location that contains
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* a pointer to a NS node, and will receive a
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* pointer to the resolved object.
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* WalkState - Current state. Valid only if executing AML
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* code. NULL if simply resolving an object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Resolve a Namespace node to a valued object
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*
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* Note: for some of the data types, the pointer attached to the Node
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* can be either a pointer to an actual internal object or a pointer into the
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* AML stream itself. These types are currently:
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*
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* ACPI_TYPE_INTEGER
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* ACPI_TYPE_STRING
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* ACPI_TYPE_BUFFER
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* ACPI_TYPE_MUTEX
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* ACPI_TYPE_PACKAGE
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveNodeToValue (
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ACPI_NAMESPACE_NODE **ObjectPtr,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *SourceDesc;
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ACPI_OPERAND_OBJECT *ObjDesc = NULL;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OBJECT_TYPE EntryType;
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ACPI_FUNCTION_TRACE ("ExResolveNodeToValue");
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/*
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* The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
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* object that is attached to the Node.
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*/
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Node = *ObjectPtr;
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SourceDesc = AcpiNsGetAttachedObject (Node);
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EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
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Node, SourceDesc, AcpiUtGetTypeName (EntryType)));
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if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) ||
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(EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS))
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{
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/* There is always exactly one level of indirection */
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Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
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SourceDesc = AcpiNsGetAttachedObject (Node);
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EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
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*ObjectPtr = Node;
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}
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/*
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* Several object types require no further processing:
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* 1) Devices rarely have an attached object, return the Node
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* 2) Method locals and arguments have a pseudo-Node
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*/
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if (EntryType == ACPI_TYPE_DEVICE ||
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(Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
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{
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return_ACPI_STATUS (AE_OK);
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}
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if (!SourceDesc)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n",
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Node));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* Action is based on the type of the Node, which indicates the type
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* of the attached object or pointer
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*/
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switch (EntryType)
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{
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case ACPI_TYPE_PACKAGE:
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if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_PACKAGE)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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Status = AcpiDsGetPackageArguments (SourceDesc);
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if (ACPI_SUCCESS (Status))
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{
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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}
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break;
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case ACPI_TYPE_BUFFER:
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if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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Status = AcpiDsGetBufferArguments (SourceDesc);
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if (ACPI_SUCCESS (Status))
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{
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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}
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break;
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case ACPI_TYPE_STRING:
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if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_STRING)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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case ACPI_TYPE_INTEGER:
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if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_INTEGER)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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case ACPI_TYPE_LOCAL_REGION_FIELD:
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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case ACPI_TYPE_LOCAL_INDEX_FIELD:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p SourceDesc=%p Type=%X\n",
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Node, SourceDesc, EntryType));
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Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc);
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break;
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/*
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* For these objects, just return the object attached to the Node
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*/
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case ACPI_TYPE_MUTEX:
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case ACPI_TYPE_METHOD:
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case ACPI_TYPE_POWER:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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case ACPI_TYPE_EVENT:
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case ACPI_TYPE_REGION:
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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/* TYPE_ANY is untyped, and thus there is no object associated with it */
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case ACPI_TYPE_ANY:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n",
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Node));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
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case ACPI_TYPE_LOCAL_REFERENCE:
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switch (SourceDesc->Reference.Opcode)
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{
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case AML_LOAD_OP:
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/* This is a DdbHandle */
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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default:
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/* No named references are allowed here */
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported Reference opcode %X (%s)\n",
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SourceDesc->Reference.Opcode,
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AcpiPsGetOpcodeName (SourceDesc->Reference.Opcode)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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break;
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/* Default case is for unknown types */
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n",
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Node, EntryType));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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} /* switch (EntryType) */
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/* Put the object descriptor on the stack */
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*ObjectPtr = (void *) ObjDesc;
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return_ACPI_STATUS (Status);
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}
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