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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 "acpi.h"
- #include "accommon.h"
- #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 */
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