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/******************************************************************************
*
* Module Name: evevent - Fixed Event handling and dispatch
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2015, 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 <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acevents.h>
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evevent")
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/* Local prototypes */
static ACPI_STATUS
AcpiEvFixedEventInitialize (
void);
static UINT32
AcpiEvFixedEventDispatch (
UINT32 Event);
/*******************************************************************************
*
* FUNCTION: AcpiEvInitializeEvents
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitializeEvents (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvInitializeEvents);
/* If Hardware Reduced flag is set, there are no fixed events */
if (AcpiGbl_ReducedHardware)
{
return_ACPI_STATUS (AE_OK);
}
/*
* Initialize the Fixed and General Purpose Events. This is done prior to
* enabling SCIs to prevent interrupts from occurring before the handlers
* are installed.
*/
Status = AcpiEvFixedEventInitialize ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Unable to initialize fixed events"));
return_ACPI_STATUS (Status);
}
Status = AcpiEvGpeInitialize ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Unable to initialize general purpose events"));
return_ACPI_STATUS (Status);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInstallXruptHandlers
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
*
******************************************************************************/
ACPI_STATUS
AcpiEvInstallXruptHandlers (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);
/* If Hardware Reduced flag is set, there is no ACPI h/w */
if (AcpiGbl_ReducedHardware)
{
return_ACPI_STATUS (AE_OK);
}
/* Install the SCI handler */
Status = AcpiEvInstallSciHandler ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Unable to install System Control Interrupt handler"));
return_ACPI_STATUS (Status);
}
/* Install the handler for the Global Lock */
Status = AcpiEvInitGlobalLockHandler ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Unable to initialize Global Lock handler"));
return_ACPI_STATUS (Status);
}
AcpiGbl_EventsInitialized = TRUE;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvFixedEventInitialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Install the fixed event handlers and disable all fixed events.
*
******************************************************************************/
static ACPI_STATUS
AcpiEvFixedEventInitialize (
void)
{
UINT32 i;
ACPI_STATUS Status;
/*
* Initialize the structure that keeps track of fixed event handlers and
* enable the fixed events.
*/
for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
{
AcpiGbl_FixedEventHandlers[i].Handler = NULL;
AcpiGbl_FixedEventHandlers[i].Context = NULL;
/* Disable the fixed event */
if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)
{
Status = AcpiWriteBitRegister (
AcpiGbl_FixedEventInfo[i].EnableRegisterId,
ACPI_DISABLE_EVENT);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvFixedEventDetect
*
* PARAMETERS: None
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Checks the PM status register for active fixed events
*
******************************************************************************/
UINT32
AcpiEvFixedEventDetect (
void)
{
UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
UINT32 FixedStatus;
UINT32 FixedEnable;
UINT32 i;
ACPI_FUNCTION_NAME (EvFixedEventDetect);
/*
* Read the fixed feature status and enable registers, as all the cases
* depend on their values. Ignore errors here.
*/
(void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
(void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
"Fixed Event Block: Enable %08X Status %08X\n",
FixedEnable, FixedStatus));
/*
* Check for all possible Fixed Events and dispatch those that are active
*/
for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
{
/* Both the status and enable bits must be on for this event */
if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&
(FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))
{
/*
* Found an active (signalled) event. Invoke global event
* handler if present.
*/
AcpiFixedEventCount[i]++;
if (AcpiGbl_GlobalEventHandler)
{
AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL,
i, AcpiGbl_GlobalEventHandlerContext);
}
IntStatus |= AcpiEvFixedEventDispatch (i);
}
}
return (IntStatus);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvFixedEventDispatch
*
* PARAMETERS: Event - Event type
*
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION: Clears the status bit for the requested event, calls the
* handler that previously registered for the event.
* NOTE: If there is no handler for the event, the event is
* disabled to prevent further interrupts.
*
******************************************************************************/
static UINT32
AcpiEvFixedEventDispatch (
UINT32 Event)
{
ACPI_FUNCTION_ENTRY ();
/* Clear the status bit */
(void) AcpiWriteBitRegister (
AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
ACPI_CLEAR_STATUS);
/*
* Make sure that a handler exists. If not, report an error
* and disable the event to prevent further interrupts.
*/
if (!AcpiGbl_FixedEventHandlers[Event].Handler)
{
(void) AcpiWriteBitRegister (
AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
ACPI_DISABLE_EVENT);
ACPI_ERROR ((AE_INFO,
"No installed handler for fixed event - %s (%u), disabling",
AcpiUtGetEventName (Event), Event));
return (ACPI_INTERRUPT_NOT_HANDLED);
}
/* Invoke the Fixed Event handler */
return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
AcpiGbl_FixedEventHandlers[Event].Context));
}
#endif /* !ACPI_REDUCED_HARDWARE */