exresolv.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/******************************************************************************
*
* Module Name: exresolv - AML Interpreter object resolution
* $Revision: 132 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2005, 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
* 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
* 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
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* 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 __EXRESOLV_C__
#include "acpi.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acparser.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exresolv")
/* Local prototypes */
static ACPI_STATUS
/*******************************************************************************
*
* FUNCTION: AcpiExResolveToValue
*
* PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
* be either an (ACPI_OPERAND_OBJECT *)
* or an ACPI_HANDLE.
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Convert Reference objects to values
*
******************************************************************************/
{
{
}
/*
* The entity pointed to by the StackPtr can be either
* 1) A valid ACPI_OPERAND_OBJECT, or
* 2) A ACPI_NAMESPACE_NODE (NamedObj)
*/
{
if (ACPI_FAILURE (Status))
{
}
if (!*StackPtr)
{
}
}
/*
* Object on the stack may have changed if AcpiExResolveObjectToValue()
* was called (i.e., we can't use an _else_ here.)
*/
{
if (ACPI_FAILURE (Status))
{
}
}
}
/*******************************************************************************
*
* FUNCTION: AcpiExResolveObjectToValue
*
* PARAMETERS: StackPtr - Pointer to an internal object
* WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Retrieve the value from an internal object. The Reference type
* uses the associated AML opcode to determine the value.
*
******************************************************************************/
static ACPI_STATUS
{
void *TempNode;
ACPI_FUNCTION_TRACE ("ExResolveObjectToValue");
/* This is an ACPI_OPERAND_OBJECT */
switch (ACPI_GET_OBJECT_TYPE (StackDesc))
{
switch (Opcode)
{
case AML_NAME_OP:
/*
* Convert name reference to a namespace node
* Then, AcpiExResolveNodeToValue can be used to get the value
*/
/* Delete the Reference Object */
/* Return the namespace node */
break;
case AML_LOCAL_OP:
case AML_ARG_OP:
/*
* Get the local from the method's state info
* Note: this increments the local's object reference count
*/
if (ACPI_FAILURE (Status))
{
}
/*
* Now we can delete the original Reference Object and
* replace it with the resolved value
*/
break;
case AML_INDEX_OP:
{
case ACPI_TYPE_BUFFER_FIELD:
/* Just return - leave the Reference on the stack */
break;
case ACPI_TYPE_PACKAGE:
if (ObjDesc)
{
/*
* Valid obj descriptor, copy pointer to return value
* (i.e., dereference the package index)
* Delete the ref object, increment the returned object
*/
}
else
{
/*
* A NULL object descriptor means an unitialized element of
* the package, can't dereference it
*/
"Attempt to deref an Index to NULL pkg element Idx=%p\n",
StackDesc));
}
break;
default:
/* Invalid reference object */
break;
}
break;
case AML_REF_OF_OP:
case AML_DEBUG_OP:
case AML_LOAD_OP:
/* Just leave the object as-is */
break;
case AML_INT_NAMEPATH_OP: /* Reference to a named object */
/* Get the object pointed to by the namespace node */
break;
default:
"During resolve, Unknown Reference opcode %X (%s) in %p\n",
break;
}
break;
case ACPI_TYPE_BUFFER:
break;
case ACPI_TYPE_PACKAGE:
break;
/* These cases may never happen here, but just in case.. */
case ACPI_TYPE_BUFFER_FIELD:
break;
default:
break;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiExResolveMultiple
*
* PARAMETERS: WalkState - Current state (contains AML opcode)
* Operand - Starting point for resolution
* ReturnType - Where the object type is returned
* ReturnDesc - Where the resolved object is returned
*
* RETURN: Status
*
* DESCRIPTION: Return the base object and type. Traverse a reference list if
* necessary to get to the base object.
*
******************************************************************************/
{
ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple");
/* Operand can be either a namespace node or an operand descriptor */
switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
{
case ACPI_DESC_TYPE_OPERAND:
break;
case ACPI_DESC_TYPE_NAMED:
/* If we had an Alias node, use the attached object for type info */
if (Type == ACPI_TYPE_LOCAL_ALIAS)
{
}
break;
default:
}
/* If type is anything other than a reference, we are done */
if (Type != ACPI_TYPE_LOCAL_REFERENCE)
{
goto Exit;
}
/*
* For reference objects created via the RefOf or Index operators,
* we need to get to the base object (as per the ACPI specification
* of the ObjectType and SizeOf operators). This means traversing
* the list of possibly many nested references.
*/
{
{
case AML_REF_OF_OP:
/* Dereference the reference pointer */
/* All "References" point to a NS node */
{
"AcpiExResolveMultiple: Not a NS node %p [%s]\n",
}
/* Get the attached object */
if (!ObjDesc)
{
/* No object, use the NS node type */
goto Exit;
}
/* Check for circular references */
{
}
break;
case AML_INDEX_OP:
/* Get the type of this reference (index into another object) */
if (Type != ACPI_TYPE_PACKAGE)
{
goto Exit;
}
/*
* The main object is a package, we want to get the type
* of the individual package element that is referenced by
* the index.
*
* This could of course in turn be another reference object.
*/
if (!ObjDesc)
{
/* NULL package elements are allowed */
Type = 0; /* Uninitialized */
goto Exit;
}
break;
case AML_INT_NAMEPATH_OP:
/* Dereference the reference pointer */
/* All "References" point to a NS node */
{
"AcpiExResolveMultiple: Not a NS node %p [%s]\n",
}
/* Get the attached object */
if (!ObjDesc)
{
/* No object, use the NS node type */
goto Exit;
}
/* Check for circular references */
{
}
break;
case AML_LOCAL_OP:
case AML_ARG_OP:
if (ReturnDesc)
{
if (ACPI_FAILURE (Status))
{
}
}
else
{
if (ACPI_FAILURE (Status))
{
}
if (!ObjDesc)
{
goto Exit;
}
}
break;
case AML_DEBUG_OP:
/* The Debug Object is of type "DebugObject" */
goto Exit;
default:
"AcpiExResolveMultiple: Unknown Reference subtype %X\n",
}
}
/*
* Now we are guaranteed to have an object that has not been created
* via the RefOf or Index operators.
*/
Exit:
/* Convert internal types to external types */
switch (Type)
{
break;
case ACPI_TYPE_LOCAL_SCOPE:
/* Per ACPI Specification, Scope is untyped */
break;
default:
/* No change to Type required */
break;
}
*ReturnType = Type;
if (ReturnDesc)
{
*ReturnDesc = ObjDesc;
}
}