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freebsd-dev/sys/contrib/dev/acpica/exresnte.c

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/******************************************************************************
*
* Module Name: exresnte - AML Interpreter object resolution
* $Revision: 39 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 "amlcode.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "actables.h"
#include "acevents.h"
#define _COMPONENT ACPI_EXECUTER
MODULE_NAME ("exresnte")
/*******************************************************************************
*
* FUNCTION: AcpiExResolveNodeToValue
*
* PARAMETERS: StackPtr - Pointer to a location on a stack that contains
* a pointer to a Node
* WalkState - Current state
*
* RETURN: Status
*
* DESCRIPTION: Resolve a Namespace node (AKA a "direct name pointer") 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 **StackPtr,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *ValDesc;
ACPI_OPERAND_OBJECT *ObjDesc = NULL;
ACPI_NAMESPACE_NODE *Node;
ACPI_OBJECT_TYPE8 EntryType;
ACPI_INTEGER TempVal;
FUNCTION_TRACE ("ExResolveNodeToValue");
/*
* The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
* object that is attached to the Node.
*/
Node = *StackPtr;
ValDesc = AcpiNsGetAttachedObject (Node);
EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p ValDesc=%p Type=%X\n",
Node, ValDesc, EntryType));
/*
* Several object types require no further processing:
* 1) Devices rarely have an attached object, return the Node
* 2) Method locals and arguments have a pseudo-Node
*/
if (EntryType == ACPI_TYPE_DEVICE ||
(Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
{
return_ACPI_STATUS (AE_OK);
}
if (!ValDesc)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n",
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 (ACPI_TYPE_PACKAGE != ValDesc->Common.Type)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a package, type %X\n",
ValDesc->Common.Type));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
ObjDesc = ValDesc;
AcpiUtAddReference (ObjDesc);
break;
case ACPI_TYPE_BUFFER:
if (ACPI_TYPE_BUFFER != ValDesc->Common.Type)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a buffer, type %X\n",
ValDesc->Common.Type));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
ObjDesc = ValDesc;
AcpiUtAddReference (ObjDesc);
break;
case ACPI_TYPE_STRING:
if (ACPI_TYPE_STRING != ValDesc->Common.Type)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a string, type %X\n",
ValDesc->Common.Type));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
ObjDesc = ValDesc;
AcpiUtAddReference (ObjDesc);
break;
case ACPI_TYPE_INTEGER:
if (ACPI_TYPE_INTEGER != ValDesc->Common.Type)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Number, type %X\n",
ValDesc->Common.Type));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
ObjDesc = ValDesc;
AcpiUtAddReference (ObjDesc);
break;
case ACPI_TYPE_BUFFER_FIELD:
case INTERNAL_TYPE_REGION_FIELD:
case INTERNAL_TYPE_BANK_FIELD:
case INTERNAL_TYPE_INDEX_FIELD:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p ValDesc=%p Type=%X\n",
Node, ValDesc, EntryType));
Status = AcpiExReadDataFromField (ValDesc, &ObjDesc);
break;
/*
* For these objects, just return the object attached to the Node
*/
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_METHOD:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
/* Return an additional reference to the object */
ObjDesc = ValDesc;
AcpiUtAddReference (ObjDesc);
break;
/* TYPE_Any is untyped, and thus there is no object associated with it */
case ACPI_TYPE_ANY:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n",
Node));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
break;
/*
* The only named references allowed are named constants
* e.g. -- Name (\OSFL, Ones)
*/
case INTERNAL_TYPE_REFERENCE:
switch (ValDesc->Reference.Opcode)
{
case AML_ZERO_OP:
TempVal = 0;
break;
case AML_ONE_OP:
TempVal = 1;
break;
case AML_ONES_OP:
TempVal = ACPI_INTEGER_MAX;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported reference opcode %X\n",
ValDesc->Reference.Opcode));
return_ACPI_STATUS (AE_AML_BAD_OPCODE);
}
/* Create object for result */
ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
ObjDesc->Integer.Value = TempVal;
/* Truncate value if we are executing from a 32-bit ACPI table */
AcpiExTruncateFor32bitTable (ObjDesc, WalkState);
break;
/* Default case is for unknown types */
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n",
Node, EntryType));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
} /* switch (EntryType) */
/* Put the object descriptor on the stack */
*StackPtr = (void *) ObjDesc;
return_ACPI_STATUS (Status);
}
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