/****************************************************************************** * * Module Name: evevent - Fixed Event handling and dispatch * $Revision: 111 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2003, 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 "acevents.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME ("evevent") /******************************************************************************* * * FUNCTION: AcpiEvInitialize * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Initialize global data structures for events. * ******************************************************************************/ ACPI_STATUS AcpiEvInitialize ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvInitialize"); /* Make sure we have ACPI tables */ if (!AcpiGbl_DSDT) { ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No ACPI tables present!\n")); return_ACPI_STATUS (AE_NO_ACPI_TABLES); } /* * Initialize the Fixed and General Purpose Events. This is * done prior to enabling SCIs to prevent interrupts from * occurring before handers are installed. */ Status = AcpiEvFixedEventInitialize (); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Unable to initialize fixed events, %s\n", AcpiFormatException (Status))); return_ACPI_STATUS (Status); } Status = AcpiEvGpeInitialize (); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Unable to initialize general purpose events, %s\n", AcpiFormatException (Status))); return_ACPI_STATUS (Status); } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvHandlerInitialize * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock * ******************************************************************************/ ACPI_STATUS AcpiEvHandlerInitialize ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("EvHandlerInitialize"); /* Install the SCI handler */ Status = AcpiEvInstallSciHandler (); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Unable to install System Control Interrupt Handler, %s\n", AcpiFormatException (Status))); return_ACPI_STATUS (Status); } /* Install the handler for the Global Lock */ Status = AcpiEvInitGlobalLockHandler (); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Unable to initialize Global Lock handler, %s\n", AcpiFormatException (Status))); return_ACPI_STATUS (Status); } AcpiGbl_EventsInitialized = TRUE; return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvFixedEventInitialize * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Install the fixed event handlers and enable the fixed events. * ******************************************************************************/ ACPI_STATUS AcpiEvFixedEventInitialize ( void) { ACPI_NATIVE_UINT 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; /* Enable the fixed event */ if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF) { Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[i].EnableRegisterId, 0, ACPI_MTX_LOCK); 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 fixed events * ******************************************************************************/ UINT32 AcpiEvFixedEventDetect ( void) { UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; UINT32 FixedStatus; UINT32 FixedEnable; ACPI_NATIVE_UINT 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_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, &FixedStatus); (void) AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 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 */ IntStatus |= AcpiEvFixedEventDispatch ((UINT32) 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. * ******************************************************************************/ UINT32 AcpiEvFixedEventDispatch ( UINT32 Event) { ACPI_FUNCTION_ENTRY (); /* Clear the status bit */ (void) AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 1, ACPI_MTX_DO_NOT_LOCK); /* * 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) AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 0, ACPI_MTX_DO_NOT_LOCK); ACPI_REPORT_ERROR ( ("No installed handler for fixed event [%08X]\n", Event)); return (ACPI_INTERRUPT_NOT_HANDLED); } /* Invoke the Fixed Event handler */ return ((AcpiGbl_FixedEventHandlers[Event].Handler)( AcpiGbl_FixedEventHandlers[Event].Context)); }