diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/events/evevent.c')
-rw-r--r-- | sys/contrib/dev/acpica/components/events/evevent.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/events/evevent.c b/sys/contrib/dev/acpica/components/events/evevent.c new file mode 100644 index 0000000..dc8457c --- /dev/null +++ b/sys/contrib/dev/acpica/components/events/evevent.c @@ -0,0 +1,336 @@ +/****************************************************************************** + * + * Module Name: evevent - Fixed Event handling and dispatch + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2013, 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 */ |