620 lines
21 KiB
C
620 lines
21 KiB
C
/*******************************************************************************
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*
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* Module Name: nseval - Object evaluation interfaces -- includes control
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* method lookup and execution.
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* xRevision: 1.137 $
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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 - 2006, 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: nseval.c,v 1.1 2006/03/23 13:36:31 kochi Exp $");
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#define __NSEVAL_C__
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#include "acpi.h"
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#include "acparser.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nseval")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiNsExecuteControlMethod (
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ACPI_PARAMETER_INFO *Info);
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static ACPI_STATUS
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AcpiNsGetObjectValue (
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ACPI_PARAMETER_INFO *Info);
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsEvaluateRelative
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*
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* PARAMETERS: Pathname - Name of method to execute, If NULL, the
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* handle is the object to execute
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* Info - Method info block, contains:
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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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* Params - 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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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluate the object or find and execute the requested method
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*
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* MUTEX: Locks Namespace
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsEvaluateRelative (
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const char *Pathname,
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ACPI_PARAMETER_INFO *Info)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node = NULL;
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ACPI_GENERIC_STATE *ScopeInfo;
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char *InternalPath = NULL;
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ACPI_FUNCTION_TRACE ("NsEvaluateRelative");
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/*
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* Must have a valid object handle
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*/
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if (!Info || !Info->Node)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Build an internal name string for the method */
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Status = AcpiNsInternalizeName (Pathname, &InternalPath);
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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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ScopeInfo = AcpiUtCreateGenericState ();
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if (!ScopeInfo)
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{
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goto Cleanup1;
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}
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/* Get the prefix handle and Node */
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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Info->Node = AcpiNsMapHandleToNode (Info->Node);
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if (!Info->Node)
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{
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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Status = AE_BAD_PARAMETER;
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goto Cleanup;
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}
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/* Lookup the name in the namespace */
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ScopeInfo->Scope.Node = Info->Node;
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Status = AcpiNsLookup (ScopeInfo, InternalPath, ACPI_TYPE_ANY,
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ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
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&Node);
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Object [%s] not found [%s]\n",
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Pathname, AcpiFormatException (Status)));
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goto Cleanup;
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}
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/*
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* Now that we have a handle to the object, we can attempt to evaluate it.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
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Pathname, Node, AcpiNsGetAttachedObject (Node)));
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Info->Node = Node;
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Status = AcpiNsEvaluateByHandle (Info);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "*** Completed eval of object %s ***\n",
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Pathname));
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Cleanup:
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AcpiUtDeleteGenericState (ScopeInfo);
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Cleanup1:
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ACPI_MEM_FREE (InternalPath);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsEvaluateByName
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*
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* PARAMETERS: Pathname - Fully qualified pathname to the object
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* Info - Method info block, contains:
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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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* Params - 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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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluate the object or rind and execute the requested method
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* passing the given parameters
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*
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* MUTEX: Locks Namespace
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsEvaluateByName (
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const char *Pathname,
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ACPI_PARAMETER_INFO *Info)
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{
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ACPI_STATUS Status;
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char *InternalPath = NULL;
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ACPI_FUNCTION_TRACE ("NsEvaluateByName");
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/* Build an internal name string for the method */
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Status = AcpiNsInternalizeName (Pathname, &InternalPath);
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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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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/* Lookup the name in the namespace */
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Status = AcpiNsLookup (NULL, InternalPath, ACPI_TYPE_ANY,
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ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
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&Info->Node);
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Object at [%s] was not found, status=%.4X\n",
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Pathname, Status));
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goto Cleanup;
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}
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/*
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* Now that we have a handle to the object, we can attempt to evaluate it.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
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Pathname, Info->Node, AcpiNsGetAttachedObject (Info->Node)));
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Status = AcpiNsEvaluateByHandle (Info);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "*** Completed eval of object %s ***\n",
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Pathname));
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Cleanup:
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/* Cleanup */
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if (InternalPath)
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{
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ACPI_MEM_FREE (InternalPath);
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsEvaluateByHandle
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*
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* PARAMETERS: Info - Method info block, contains:
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* Node - Method/Object Node 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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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluate object or execute the requested method passing the
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* given parameters
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*
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* MUTEX: Locks Namespace
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsEvaluateByHandle (
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ACPI_PARAMETER_INFO *Info)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("NsEvaluateByHandle");
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/* Check if namespace has been initialized */
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if (!AcpiGbl_RootNode)
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{
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return_ACPI_STATUS (AE_NO_NAMESPACE);
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}
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/* Parameter Validation */
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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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/* Get the prefix handle and Node */
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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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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Info->Node = AcpiNsMapHandleToNode (Info->Node);
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if (!Info->Node)
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{
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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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->Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
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{
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Info->Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->Node->Object);
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}
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/*
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* Two major cases here:
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* 1) The object is an actual 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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* In both cases, the namespace is unlocked by the AcpiNs* procedure
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*/
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if (AcpiNsGetType (Info->Node) == ACPI_TYPE_METHOD)
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{
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/*
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* Case 1) We have an actual control method to execute
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*/
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Status = AcpiNsExecuteControlMethod (Info);
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}
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else
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{
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/*
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* Case 2) Object is NOT a method, just return its current value
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*/
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Status = AcpiNsGetObjectValue (Info);
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}
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/*
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* Check if there is a return value on the stack 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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/* 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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/*
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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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/*******************************************************************************
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*
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* FUNCTION: AcpiNsExecuteControlMethod
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*
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* PARAMETERS: Info - Method info block, contains:
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* Node - Method Node to execute
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* ObjDesc - Method object
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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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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute the requested method passing the given parameters
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*
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* MUTEX: Assumes namespace is locked
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiNsExecuteControlMethod (
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ACPI_PARAMETER_INFO *Info)
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{
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ACPI_STATUS Status;
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|
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ACPI_FUNCTION_TRACE ("NsExecuteControlMethod");
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|
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/* Verify that there is a method associated with this object */
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Info->ObjDesc = AcpiNsGetAttachedObject (Info->Node);
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if (!Info->ObjDesc)
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{
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ACPI_ERROR ((AE_INFO, "No attached method object"));
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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ACPI_DUMP_PATHNAME (Info->Node, "Execute Method:",
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ACPI_LV_INFO, _COMPONENT);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Method at AML address %p Length %X\n",
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Info->ObjDesc->Method.AmlStart + 1, Info->ObjDesc->Method.AmlLength - 1));
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/*
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* Unlock the namespace before execution. This allows namespace access
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* via the external Acpi* interfaces while a method is being executed.
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* However, 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 the
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* namespace that is being deleted.
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*/
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Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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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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* 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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Status = AcpiExEnterInterpreter ();
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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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Status = AcpiPsExecuteMethod (Info);
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AcpiExExitInterpreter ();
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsGetObjectValue
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*
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* PARAMETERS: Info - Method info block, contains:
|
|
* Node - Object's NS node
|
|
* ReturnObject - Where to put object value (if
|
|
* any). If NULL, no value is returned.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Return the current value of the object
|
|
*
|
|
* MUTEX: Assumes namespace is locked, leaves namespace unlocked
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiNsGetObjectValue (
|
|
ACPI_PARAMETER_INFO *Info)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_NAMESPACE_NODE *ResolvedNode = Info->Node;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("NsGetObjectValue");
|
|
|
|
|
|
/*
|
|
* Objects require additional resolution steps (e.g., the Node may be a
|
|
* field that must be read, etc.) -- we can't just grab the object out of
|
|
* the node.
|
|
*/
|
|
|
|
/*
|
|
* Use ResolveNodeToValue() to get the associated value. This call always
|
|
* deletes ObjDesc (allocated above).
|
|
*
|
|
* NOTE: we can get away with passing in NULL for a walk state because
|
|
* ObjDesc is guaranteed to not be a reference to either a method local or
|
|
* a method argument (because this interface can only be called from the
|
|
* AcpiEvaluate external interface, never called from a running method.)
|
|
*
|
|
* Even though we do not directly invoke the interpreter for this, we must
|
|
* enter it because we could access an opregion. The opregion access code
|
|
* assumes that the interpreter is locked.
|
|
*
|
|
* We must release the namespace lock before entering the intepreter.
|
|
*/
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiExEnterInterpreter ();
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AcpiExResolveNodeToValue (&ResolvedNode, NULL);
|
|
/*
|
|
* If AcpiExResolveNodeToValue() succeeded, the return value was placed
|
|
* in ResolvedNode.
|
|
*/
|
|
AcpiExExitInterpreter ();
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AE_CTRL_RETURN_VALUE;
|
|
Info->ReturnObject = ACPI_CAST_PTR
|
|
(ACPI_OPERAND_OBJECT, ResolvedNode);
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returning object %p [%s]\n",
|
|
Info->ReturnObject,
|
|
AcpiUtGetObjectTypeName (Info->ReturnObject)));
|
|
}
|
|
}
|
|
|
|
/* Namespace is unlocked */
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|