/******************************************************************************
*
* Module Name: exresnte - AML Interpreter object resolution
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __EXRESNTE_C__
#include "acpi.h"
#include "accommon.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exresnte")
/*******************************************************************************
*
* FUNCTION: AcpiExResolveNodeToValue
*
* PARAMETERS: ObjectPtr - Pointer to a location that contains
* a pointer to a NS node, and will receive a
* pointer to the resolved object.
* WalkState - Current state. Valid only if executing AML
* code. NULL if simply resolving an object
*
* RETURN: Status
*
* DESCRIPTION: Resolve a Namespace node to a valued object
*
* Note: for some of the data types, the pointer attached to the Node
* can be either a pointer to an actual internal object or a pointer into the
* AML stream itself. These types are currently:
*
* ACPI_TYPE_INTEGER
* ACPI_TYPE_STRING
* ACPI_TYPE_BUFFER
* ACPI_TYPE_MUTEX
* ACPI_TYPE_PACKAGE
*
******************************************************************************/
ACPI_STATUS
AcpiExResolveNodeToValue (
ACPI_NAMESPACE_NODE **ObjectPtr,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *SourceDesc;
ACPI_OPERAND_OBJECT *ObjDesc = NULL;
ACPI_NAMESPACE_NODE *Node;
ACPI_OBJECT_TYPE EntryType;
ACPI_FUNCTION_TRACE (ExResolveNodeToValue);
/*
* The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
* object that is attached to the Node.
*/
Node = *ObjectPtr;
SourceDesc = AcpiNsGetAttachedObject (Node);
EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
Node, SourceDesc, AcpiUtGetTypeName (EntryType)));
if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) ||
(EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS))
{
/* There is always exactly one level of indirection */
Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
SourceDesc = AcpiNsGetAttachedObject (Node);
EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
*ObjectPtr = Node;
}
/*
* Several object types require no further processing:
* 1) Device/Thermal objects don't have a "real" subobject, return the Node
* 2) Method locals and arguments have a pseudo-Node
* 3) 10/2007: Added method type to assist with Package construction.
*/
if ((EntryType == ACPI_TYPE_DEVICE) ||
(EntryType == ACPI_TYPE_THERMAL) ||
(EntryType == ACPI_TYPE_METHOD) ||
(Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
{
return_ACPI_STATUS (AE_OK);
}
if (!SourceDesc)
{
ACPI_ERROR ((AE_INFO, "No object attached to node %p",
Node));
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
/*
* Action is based on the type of the Node, which indicates the type
* of the attached object or pointer
*/
switch (EntryType)
{
case ACPI_TYPE_PACKAGE:
if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE)
{
ACPI_ERROR ((AE_INFO, "Object not a Package, type %s",
AcpiUtGetObjectTypeName (SourceDesc)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
Status = AcpiDsGetPackageArguments (SourceDesc);
if (ACPI_SUCCESS (Status))
{
/* Return an additional reference to the object */
ObjDesc = SourceDesc;
AcpiUtAddReference (ObjDesc);
}
break;
case ACPI_TYPE_BUFFER:
if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)
{
ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s",
AcpiUtGetObjectTypeName (SourceDesc)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
Status = AcpiDsGetBufferArguments (SourceDesc);
if (ACPI_SUCCESS (Status))
{
/* Return an additional reference to the object */
ObjDesc = SourceDesc;
AcpiUtAddReference (ObjDesc);
}
break;
case ACPI_TYPE_STRING:
if (SourceDesc->Common.Type != ACPI_TYPE_STRING)
{
ACPI_ERROR ((AE_INFO, "Object not a String, type %s",
AcpiUtGetObjectTypeName (SourceDesc)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
ObjDesc = SourceDesc;
AcpiUtAddReference (ObjDesc);
break;
case ACPI_TYPE_INTEGER:
if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER)
{
ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s",
AcpiUtGetObjectTypeName (SourceDesc)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
ObjDesc = SourceDesc;
AcpiUtAddReference (ObjDesc);
break;
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"FieldRead Node=%p SourceDesc=%p Type=%X\n",
Node, SourceDesc, EntryType));
Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc);
break;
/* For these objects, just return the object attached to the Node */
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
/* Return an additional reference to the object */
ObjDesc = SourceDesc;
AcpiUtAddReference (ObjDesc);
break;
/* TYPE_ANY is untyped, and thus there is no object associated with it */
case ACPI_TYPE_ANY:
ACPI_ERROR ((AE_INFO,
"Untyped entry %p, no attached object!", Node));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
case ACPI_TYPE_LOCAL_REFERENCE:
switch (SourceDesc->Reference.Class)
{
case ACPI_REFCLASS_TABLE: /* This is a DdbHandle */
case ACPI_REFCLASS_REFOF:
case ACPI_REFCLASS_INDEX:
/* Return an additional reference to the object */
ObjDesc = SourceDesc;
AcpiUtAddReference (ObjDesc);
break;
default:
/* No named references are allowed here */
ACPI_ERROR ((AE_INFO,
"Unsupported Reference type 0x%X",
SourceDesc->Reference.Class));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
break;
default:
/* Default case is for unknown types */
ACPI_ERROR ((AE_INFO,
"Node %p - Unknown object type 0x%X",
Node, EntryType));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
} /* switch (EntryType) */
/* Return the object descriptor */
*ObjectPtr = (void *) ObjDesc;
return_ACPI_STATUS (Status);
}