317 lines
13 KiB
C
317 lines
13 KiB
C
/*******************************************************************************
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*
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* Module Name: nseval - Object evaluation, includes control method execution
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* $Revision: 1.2 $
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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 - 2007, 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 __NSEVAL_C__
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#include <dist/acpica/acpi.h>
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#include <dist/acpica/acparser.h>
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#include <dist/acpica/acinterp.h>
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#include <dist/acpica/acnamesp.h>
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nseval")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsEvaluate
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*
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* PARAMETERS: Info - Evaluation info block, contains:
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* PrefixNode - Prefix or Method/Object Node to execute
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* Pathname - Name of method to execute, If NULL, the
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* Node is the object to execute
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* Parameters - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* ReturnObject - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* ParameterType - Type of Parameter list
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* ReturnObject - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* Flags - ACPI_IGNORE_RETURN_VALUE to delete return
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a control method or return the current value of an
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* ACPI namespace object.
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*
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* MUTEX: Locks interpreter
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsEvaluate (
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ACPI_EVALUATE_INFO *Info)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (NsEvaluate);
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if (!Info)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Initialize the return value to an invalid object */
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Info->ReturnObject = NULL;
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/*
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* Get the actual namespace node for the target object. Handles these cases:
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*
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* 1) Null node, Pathname (absolute path)
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* 2) Node, Pathname (path relative to Node)
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* 3) Node, Null Pathname
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*/
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Status = AcpiNsGetNode (Info->PrefixNode, Info->Pathname,
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ACPI_NS_NO_UPSEARCH, &Info->ResolvedNode);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/*
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* For a method alias, we must grab the actual method node so that proper
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* scoping context will be established before execution.
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*/
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if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
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{
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Info->ResolvedNode =
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ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->ResolvedNode->Object);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", Info->Pathname,
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Info->ResolvedNode, AcpiNsGetAttachedObject (Info->ResolvedNode)));
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/*
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* Two major cases here:
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*
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* 1) The object is a control method -- execute it
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* 2) The object is not a method -- just return it's current value
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*/
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if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_METHOD)
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{
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/*
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* 1) Object is a control method - execute it
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*/
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/* Verify that there is a method object associated with this node */
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Info->ObjDesc = AcpiNsGetAttachedObject (Info->ResolvedNode);
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if (!Info->ObjDesc)
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{
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ACPI_ERROR ((AE_INFO, "Control method has no attached sub-object"));
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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ACPI_DUMP_PATHNAME (Info->ResolvedNode, "Execute Method:",
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ACPI_LV_INFO, _COMPONENT);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Method at AML address %p Length %X\n",
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Info->ObjDesc->Method.AmlStart + 1,
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Info->ObjDesc->Method.AmlLength - 1));
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/*
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* Any namespace deletion must acquire both the namespace and
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* interpreter locks to ensure that no thread is using the portion of
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* the namespace that is being deleted.
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*
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* Execute the method via the interpreter. The interpreter is locked
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* here before calling into the AML parser
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*/
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AcpiExEnterInterpreter ();
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Status = AcpiPsExecuteMethod (Info);
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AcpiExExitInterpreter ();
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}
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else
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{
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/*
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* 2) Object is not a method, return its current value
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*/
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/*
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* Objects require additional resolution steps (e.g., the Node may be
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* a field that must be read, etc.) -- we can't just grab the object
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* out of the node.
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*
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* Use ResolveNodeToValue() to get the associated value.
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*
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* NOTE: we can get away with passing in NULL for a walk state because
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* ResolvedNode is guaranteed to not be a reference to either a method
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* local or a method argument (because this interface is never called
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* from a running method.)
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*
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* Even though we do not directly invoke the interpreter for object
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* resolution, we must lock it because we could access an opregion.
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* The opregion access code assumes that the interpreter is locked.
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*/
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AcpiExEnterInterpreter ();
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/* Function has a strange interface */
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Status = AcpiExResolveNodeToValue (&Info->ResolvedNode, NULL);
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AcpiExExitInterpreter ();
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/*
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* If AcpiExResolveNodeToValue() succeeded, the return value was placed
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* in ResolvedNode.
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*/
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if (ACPI_SUCCESS (Status))
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{
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Status = AE_CTRL_RETURN_VALUE;
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Info->ReturnObject =
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ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->ResolvedNode);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n",
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Info->ReturnObject,
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AcpiUtGetObjectTypeName (Info->ReturnObject)));
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}
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}
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/*
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* Check if there is a return value that must be dealt with
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*/
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if (Status == AE_CTRL_RETURN_VALUE)
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{
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/* If caller does not want the return value, delete it */
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if (Info->Flags & ACPI_IGNORE_RETURN_VALUE)
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{
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AcpiUtRemoveReference (Info->ReturnObject);
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Info->ReturnObject = NULL;
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}
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/* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
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Status = AE_OK;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"*** Completed evaluation of object %s ***\n", Info->Pathname));
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/*
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* Namespace was unlocked by the handling AcpiNs* function, so we
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* just return
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*/
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return_ACPI_STATUS (Status);
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}
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