/*******************************************************************************
*
* Module Name: evsci - System Control Interrupt configuration and
* legacy to ACPI mode state transition functions
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2016, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evsci")
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/* Local prototypes */
static UINT32 ACPI_SYSTEM_XFACE
AcpiEvSciXruptHandler (
void *Context);
/*******************************************************************************
*
* FUNCTION: AcpiEvSciDispatch
*
* PARAMETERS: None
*
* RETURN: Status code indicates whether interrupt was handled.
*
* DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers.
*
******************************************************************************/
UINT32
AcpiEvSciDispatch (
void)
{
ACPI_SCI_HANDLER_INFO *SciHandler;
ACPI_CPU_FLAGS Flags;
UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
ACPI_FUNCTION_NAME (EvSciDispatch);
/* Are there any host-installed SCI handlers? */
if (!AcpiGbl_SciHandlerList)
{
return (IntStatus);
}
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Invoke all host-installed SCI handlers */
SciHandler = AcpiGbl_SciHandlerList;
while (SciHandler)
{
/* Invoke the installed handler (at interrupt level) */
IntStatus |= SciHandler->Address (
SciHandler->Context);
SciHandler = SciHandler->Next;
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return (IntStatus);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvSciXruptHandler
*
* PARAMETERS: Context - Calling Context
*
* RETURN: Status code indicates whether interrupt was handled.
*
* DESCRIPTION: Interrupt handler that will figure out what function or
* control method to call to deal with a SCI.
*
******************************************************************************/
static UINT32 ACPI_SYSTEM_XFACE
AcpiEvSciXruptHandler (
void *Context)
{
ACPI_GPE_XRUPT_INFO *GpeXruptList = Context;
UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
ACPI_FUNCTION_TRACE (EvSciXruptHandler);
/*
* We are guaranteed by the ACPICA initialization/shutdown code that
* if this interrupt handler is installed, ACPI is enabled.
*/
/*
* Fixed Events:
* Check for and dispatch any Fixed Events that have occurred
*/
InterruptHandled |= AcpiEvFixedEventDetect ();
/*
* General Purpose Events:
* Check for and dispatch any GPEs that have occurred
*/
InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
/* Invoke all host-installed SCI handlers */
InterruptHandled |= AcpiEvSciDispatch ();
AcpiSciCount++;
return_UINT32 (InterruptHandled);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvGpeXruptHandler
*
* PARAMETERS: Context - Calling Context
*
* RETURN: Status code indicates whether interrupt was handled.
*
* DESCRIPTION: Handler for GPE Block Device interrupts
*
******************************************************************************/
UINT32 ACPI_SYSTEM_XFACE
AcpiEvGpeXruptHandler (
void *Context)
{
ACPI_GPE_XRUPT_INFO *GpeXruptList = Context;
UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
ACPI_FUNCTION_TRACE (EvGpeXruptHandler);
/*
* We are guaranteed by the ACPICA initialization/shutdown code that
* if this interrupt handler is installed, ACPI is enabled.
*/
/* GPEs: Check for and dispatch any GPEs that have occurred */
InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
return_UINT32 (InterruptHandled);
}
/******************************************************************************
*
* FUNCTION: AcpiEvInstallSciHandler
*
* PARAMETERS: none
*
* RETURN: Status
*
* DESCRIPTION: Installs SCI handler.
*
******************************************************************************/
UINT32
AcpiEvInstallSciHandler (
void)
{
UINT32 Status = AE_OK;
ACPI_FUNCTION_TRACE (EvInstallSciHandler);
Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead);
return_ACPI_STATUS (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiEvRemoveAllSciHandlers
*
* PARAMETERS: none
*
* RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not
* installed to begin with
*
* DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
* taken. Remove all host-installed SCI handlers.
*
* Note: It doesn't seem important to disable all events or set the event
* enable registers to their original values. The OS should disable
* the SCI interrupt level when the handler is removed, so no more
* events will come in.
*
******************************************************************************/
ACPI_STATUS
AcpiEvRemoveAllSciHandlers (
void)
{
ACPI_SCI_HANDLER_INFO *SciHandler;
ACPI_CPU_FLAGS Flags;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvRemoveAllSciHandlers);
/* Just let the OS remove the handler and disable the level */
Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
AcpiEvSciXruptHandler);
if (!AcpiGbl_SciHandlerList)
{
return (Status);
}
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Free all host-installed SCI handlers */
while (AcpiGbl_SciHandlerList)
{
SciHandler = AcpiGbl_SciHandlerList;
AcpiGbl_SciHandlerList = SciHandler->Next;
ACPI_FREE (SciHandler);
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
#endif /* !ACPI_REDUCED_HARDWARE */