441 lines
12 KiB
C
441 lines
12 KiB
C
/******************************************************************************
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*
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* Module Name: psxface - Parser external interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define __PSXFACE_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "actables.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psxface")
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/* Local Prototypes */
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static void
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AcpiPsStartTrace (
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ACPI_EVALUATE_INFO *Info);
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static void
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AcpiPsStopTrace (
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ACPI_EVALUATE_INFO *Info);
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static void
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AcpiPsUpdateParameterList (
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ACPI_EVALUATE_INFO *Info,
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UINT16 Action);
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/*******************************************************************************
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*
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* FUNCTION: AcpiDebugTrace
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*
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* PARAMETERS: MethodName - Valid ACPI name string
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* DebugLevel - Optional level mask. 0 to use default
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* DebugLayer - Optional layer mask. 0 to use default
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* Flags - bit 1: one shot(1) or persistent(0)
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*
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* RETURN: Status
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*
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* DESCRIPTION: External interface to enable debug tracing during control
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* method execution
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDebugTrace (
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char *Name,
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UINT32 DebugLevel,
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UINT32 DebugLayer,
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UINT32 Flags)
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{
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ACPI_STATUS Status;
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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 (Status);
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}
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/* TBDs: Validate name, allow full path or just nameseg */
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AcpiGbl_TraceMethodName = *ACPI_CAST_PTR (UINT32, Name);
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AcpiGbl_TraceFlags = Flags;
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if (DebugLevel)
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{
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AcpiGbl_TraceDbgLevel = DebugLevel;
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}
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if (DebugLayer)
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{
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AcpiGbl_TraceDbgLayer = DebugLayer;
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}
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsStartTrace
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*
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* PARAMETERS: Info - Method info struct
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*
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* RETURN: None
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*
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* DESCRIPTION: Start control method execution trace
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*
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******************************************************************************/
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static void
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AcpiPsStartTrace (
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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_ENTRY ();
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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;
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}
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if ((!AcpiGbl_TraceMethodName) ||
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(AcpiGbl_TraceMethodName != Info->Node->Name.Integer))
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{
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goto Exit;
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}
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AcpiGbl_OriginalDbgLevel = AcpiDbgLevel;
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AcpiGbl_OriginalDbgLayer = AcpiDbgLayer;
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AcpiDbgLevel = 0x00FFFFFF;
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AcpiDbgLayer = ACPI_UINT32_MAX;
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if (AcpiGbl_TraceDbgLevel)
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{
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AcpiDbgLevel = AcpiGbl_TraceDbgLevel;
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}
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if (AcpiGbl_TraceDbgLayer)
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{
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AcpiDbgLayer = AcpiGbl_TraceDbgLayer;
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}
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Exit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsStopTrace
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*
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* PARAMETERS: Info - Method info struct
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*
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* RETURN: None
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*
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* DESCRIPTION: Stop control method execution trace
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*
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******************************************************************************/
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static void
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AcpiPsStopTrace (
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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_ENTRY ();
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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;
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}
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if ((!AcpiGbl_TraceMethodName) ||
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(AcpiGbl_TraceMethodName != Info->Node->Name.Integer))
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{
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goto Exit;
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}
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/* Disable further tracing if type is one-shot */
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if (AcpiGbl_TraceFlags & 1)
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{
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AcpiGbl_TraceMethodName = 0;
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AcpiGbl_TraceDbgLevel = 0;
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AcpiGbl_TraceDbgLayer = 0;
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}
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AcpiDbgLevel = AcpiGbl_OriginalDbgLevel;
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AcpiDbgLayer = AcpiGbl_OriginalDbgLayer;
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Exit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsExecuteMethod
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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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* PassNumber - Parse or execute pass
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a control method
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPsExecuteMethod (
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ACPI_EVALUATE_INFO *Info)
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{
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ACPI_STATUS Status;
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ACPI_PARSE_OBJECT *Op;
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ACPI_WALK_STATE *WalkState;
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ACPI_FUNCTION_TRACE (PsExecuteMethod);
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/* Quick validation of DSDT header */
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AcpiTbCheckDsdtHeader ();
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/* Validate the Info and method Node */
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if (!Info || !Info->Node)
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{
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return_ACPI_STATUS (AE_NULL_ENTRY);
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}
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/* Init for new method, wait on concurrency semaphore */
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Status = AcpiDsBeginMethodExecution (Info->Node, Info->ObjDesc, NULL);
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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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* The caller "owns" the parameters, so give each one an extra reference
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*/
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AcpiPsUpdateParameterList (Info, REF_INCREMENT);
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/* Begin tracing if requested */
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AcpiPsStartTrace (Info);
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/*
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* Execute the method. Performs parse simultaneously
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
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"**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
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Info->Node->Name.Ascii, Info->Node, Info->ObjDesc));
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/* Create and init a Root Node */
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Op = AcpiPsCreateScopeOp ();
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if (!Op)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/* Create and initialize a new walk state */
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Info->PassNumber = ACPI_IMODE_EXECUTE;
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WalkState = AcpiDsCreateWalkState (
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Info->ObjDesc->Method.OwnerId, NULL, NULL, NULL);
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if (!WalkState)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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Status = AcpiDsInitAmlWalk (WalkState, Op, Info->Node,
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Info->ObjDesc->Method.AmlStart,
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Info->ObjDesc->Method.AmlLength, Info, Info->PassNumber);
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if (ACPI_FAILURE (Status))
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{
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AcpiDsDeleteWalkState (WalkState);
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goto Cleanup;
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}
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if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
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{
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WalkState->ParseFlags |= ACPI_PARSE_MODULE_LEVEL;
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}
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/* Invoke an internal method if necessary */
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if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_INTERNAL_ONLY)
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{
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Status = Info->ObjDesc->Method.Dispatch.Implementation (WalkState);
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Info->ReturnObject = WalkState->ReturnDesc;
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/* Cleanup states */
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AcpiDsScopeStackClear (WalkState);
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AcpiPsCleanupScope (&WalkState->ParserState);
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AcpiDsTerminateControlMethod (WalkState->MethodDesc, WalkState);
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AcpiDsDeleteWalkState (WalkState);
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goto Cleanup;
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}
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/*
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* Start method evaluation with an implicit return of zero.
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* This is done for Windows compatibility.
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*/
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if (AcpiGbl_EnableInterpreterSlack)
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{
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WalkState->ImplicitReturnObj =
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AcpiUtCreateIntegerObject ((UINT64) 0);
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if (!WalkState->ImplicitReturnObj)
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{
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Status = AE_NO_MEMORY;
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AcpiDsDeleteWalkState (WalkState);
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goto Cleanup;
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}
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}
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/* Parse the AML */
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Status = AcpiPsParseAml (WalkState);
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/* WalkState was deleted by ParseAml */
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Cleanup:
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AcpiPsDeleteParseTree (Op);
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/* End optional tracing */
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AcpiPsStopTrace (Info);
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/* Take away the extra reference that we gave the parameters above */
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AcpiPsUpdateParameterList (Info, REF_DECREMENT);
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/* Exit now if error above */
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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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* If the method has returned an object, signal this to the caller with
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* a control exception code
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*/
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if (Info->ReturnObject)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
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Info->ReturnObject));
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ACPI_DUMP_STACK_ENTRY (Info->ReturnObject);
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Status = AE_CTRL_RETURN_VALUE;
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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: AcpiPsUpdateParameterList
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*
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* PARAMETERS: Info - See ACPI_EVALUATE_INFO
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* (Used: ParameterType and Parameters)
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* Action - Add or Remove reference
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*
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* RETURN: Status
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*
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* DESCRIPTION: Update reference count on all method parameter objects
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*
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******************************************************************************/
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static void
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AcpiPsUpdateParameterList (
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ACPI_EVALUATE_INFO *Info,
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UINT16 Action)
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{
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UINT32 i;
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if (Info->Parameters)
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{
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/* Update reference count for each parameter */
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for (i = 0; Info->Parameters[i]; i++)
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{
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/* Ignore errors, just do them all */
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(void) AcpiUtUpdateObjectReference (Info->Parameters[i], Action);
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}
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}
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}
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