/******************************************************************************
*
* Module Name: evevent - Fixed Event handling and dispatch
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evevent")
/* 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);
/*
* 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: AcpiEvInstallFadtGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
* (0 and 1). This causes the _PRW methods to be run, so the HW
* must be fully initialized at this point, including global lock
* support.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInstallFadtGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvInstallFadtGpes);
/* Namespace must be locked */
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* FADT GPE Block 0 */
(void) AcpiEvInitializeGpeBlock (
AcpiGbl_FadtGpeDevice, AcpiGbl_GpeFadtBlocks[0]);
/* FADT GPE Block 1 */
(void) AcpiEvInitializeGpeBlock (
AcpiGbl_FadtGpeDevice, AcpiGbl_GpeFadtBlocks[1]);
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* 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);
/* 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 */
AcpiFixedEventCount[i]++;
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.
*
******************************************************************************/
static UINT32
AcpiEvFixedEventDispatch (
UINT32 Event)
{
ACPI_FUNCTION_ENTRY ();
/* Clear the status bit */
(void) AcpiWriteBitRegister (
AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
ACPI_CLEAR_STATUS);
/*
* Make sure we've got a handler. If not, report an error. The event is
* disabled to prevent further interrupts.
*/
if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
{
(void) AcpiWriteBitRegister (
AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
ACPI_DISABLE_EVENT);
ACPI_ERROR ((AE_INFO,
"No installed handler for fixed event [0x%08X]",
Event));
return (ACPI_INTERRUPT_NOT_HANDLED);
}
/* Invoke the Fixed Event handler */
return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
AcpiGbl_FixedEventHandlers[Event].Context));
}