evsci.c revision 99679
167754Smsmith/******************************************************************************* 267754Smsmith * 367754Smsmith * Module Name: evsci - System Control Interrupt configuration and 467754Smsmith * legacy to ACPI mode state transition functions 599679Siwasaki * $Revision: 86 $ 667754Smsmith * 767754Smsmith ******************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 1391116Smsmith * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 1470243Smsmith * All rights reserved. 1567754Smsmith * 1667754Smsmith * 2. License 1767754Smsmith * 1867754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1967754Smsmith * rights. You may have additional license terms from the party that provided 2067754Smsmith * you this software, covering your right to use that party's intellectual 2167754Smsmith * property rights. 2267754Smsmith * 2367754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2467754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2567754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2667754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2767754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2867754Smsmith * Code in any form, with the right to sublicense such rights; and 2967754Smsmith * 3067754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3167754Smsmith * license (with the right to sublicense), under only those claims of Intel 3267754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3367754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3467754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3567754Smsmith * license, and in no event shall the patent license extend to any additions 3667754Smsmith * to or modifications of the Original Intel Code. No other license or right 3767754Smsmith * is granted directly or by implication, estoppel or otherwise; 3867754Smsmith * 3967754Smsmith * The above copyright and patent license is granted only if the following 4067754Smsmith * conditions are met: 4167754Smsmith * 4267754Smsmith * 3. Conditions 4367754Smsmith * 4467754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4567754Smsmith * Redistribution of source code of any substantial portion of the Covered 4667754Smsmith * Code or modification with rights to further distribute source must include 4767754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4867754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4967754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 5067754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5167754Smsmith * Code and the date of any change. Licensee must include in that file the 5267754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5367754Smsmith * must include a prominent statement that the modification is derived, 5467754Smsmith * directly or indirectly, from Original Intel Code. 5567754Smsmith * 5667754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5767754Smsmith * Redistribution of source code of any substantial portion of the Covered 5867754Smsmith * Code or modification without rights to further distribute source must 5967754Smsmith * include the following Disclaimer and Export Compliance provision in the 6067754Smsmith * documentation and/or other materials provided with distribution. In 6167754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6267754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6367754Smsmith * license from Licensee to its licensee is limited to the intellectual 6467754Smsmith * property embodied in the software Licensee provides to its licensee, and 6567754Smsmith * not to intellectual property embodied in modifications its licensee may 6667754Smsmith 6767754Smsmith * make. 6867754Smsmith * 6967754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 7067754Smsmith * substantial portion of the Covered Code or modification must reproduce the 7167754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7267754Smsmith * provision in the documentation and/or other materials provided with the 7367754Smsmith * distribution. 7467754Smsmith * 7567754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7667754Smsmith * Intel Code. 7767754Smsmith * 7867754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7967754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 8067754Smsmith * other dealings in products derived from or relating to the Covered Code 8167754Smsmith * without prior written authorization from Intel. 8267754Smsmith * 8367754Smsmith * 4. Disclaimer and Export Compliance 8467754Smsmith * 8567754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8667754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8767754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8867754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8967754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 9067754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 9167754Smsmith * PARTICULAR PURPOSE. 9267754Smsmith * 9367754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9467754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9567754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9667754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9767754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9867754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9967754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 10067754Smsmith * LIMITED REMEDY. 10167754Smsmith * 10267754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10367754Smsmith * software or system incorporating such software without first obtaining any 10467754Smsmith * required license or other approval from the U. S. Department of Commerce or 10567754Smsmith * any other agency or department of the United States Government. In the 10667754Smsmith * event Licensee exports any such software from the United States or 10767754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10867754Smsmith * ensure that the distribution and export/re-export of the software is in 10967754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 11067754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 11167754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11267754Smsmith * software, or service, directly or indirectly, to any country for which the 11367754Smsmith * United States government or any agency thereof requires an export license, 11467754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11567754Smsmith * such license, approval or letter. 11667754Smsmith * 11767754Smsmith *****************************************************************************/ 11867754Smsmith 11967754Smsmith#include "acpi.h" 12067754Smsmith#include "acevents.h" 12167754Smsmith 12267754Smsmith 12377424Smsmith#define _COMPONENT ACPI_EVENTS 12491116Smsmith ACPI_MODULE_NAME ("evsci") 12567754Smsmith 12667754Smsmith 12767754Smsmith/******************************************************************************* 12867754Smsmith * 12967754Smsmith * FUNCTION: AcpiEvSciHandler 13067754Smsmith * 13167754Smsmith * PARAMETERS: Context - Calling Context 13267754Smsmith * 13367754Smsmith * RETURN: Status code indicates whether interrupt was handled. 13467754Smsmith * 13567754Smsmith * DESCRIPTION: Interrupt handler that will figure out what function or 13667754Smsmith * control method to call to deal with a SCI. Installed 13767754Smsmith * using BU interrupt support. 13867754Smsmith * 13967754Smsmith ******************************************************************************/ 14067754Smsmith 14192388Smsmithstatic UINT32 ACPI_SYSTEM_XFACE 14291116SmsmithAcpiEvSciHandler ( 14391116Smsmith void *Context) 14467754Smsmith{ 14591116Smsmith UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED; 14699679Siwasaki UINT32 Value; 14799679Siwasaki ACPI_STATUS Status; 14867754Smsmith 14967754Smsmith 15091116Smsmith ACPI_FUNCTION_TRACE("EvSciHandler"); 15167754Smsmith 15267754Smsmith 15367754Smsmith /* 15467754Smsmith * Make sure that ACPI is enabled by checking SCI_EN. Note that we are 15567754Smsmith * required to treat the SCI interrupt as sharable, level, active low. 15667754Smsmith */ 15799679Siwasaki Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value, ACPI_MTX_DO_NOT_LOCK); 15899679Siwasaki if (ACPI_FAILURE (Status)) 15967754Smsmith { 16099679Siwasaki return (ACPI_INTERRUPT_NOT_HANDLED); 16199679Siwasaki } 16299679Siwasaki 16399679Siwasaki if (!Value) 16499679Siwasaki { 16567754Smsmith /* ACPI is not enabled; this interrupt cannot be for us */ 16667754Smsmith 16791116Smsmith return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 16867754Smsmith } 16967754Smsmith 17067754Smsmith /* 17167754Smsmith * Fixed AcpiEvents: 17267754Smsmith * ------------- 17367754Smsmith * Check for and dispatch any Fixed AcpiEvents that have occurred 17467754Smsmith */ 17567754Smsmith InterruptHandled |= AcpiEvFixedEventDetect (); 17667754Smsmith 17767754Smsmith /* 17867754Smsmith * GPEs: 17967754Smsmith * ----- 18067754Smsmith * Check for and dispatch any GPEs that have occurred 18167754Smsmith */ 18267754Smsmith InterruptHandled |= AcpiEvGpeDetect (); 18367754Smsmith 18467754Smsmith return_VALUE (InterruptHandled); 18567754Smsmith} 18667754Smsmith 18767754Smsmith 18867754Smsmith/****************************************************************************** 18967754Smsmith * 19067754Smsmith * FUNCTION: AcpiEvInstallSciHandler 19167754Smsmith * 19267754Smsmith * PARAMETERS: none 19367754Smsmith * 19467754Smsmith * RETURN: Status 19567754Smsmith * 19667754Smsmith * DESCRIPTION: Installs SCI handler. 19767754Smsmith * 19867754Smsmith ******************************************************************************/ 19967754Smsmith 20067754SmsmithUINT32 20167754SmsmithAcpiEvInstallSciHandler (void) 20267754Smsmith{ 20383174Smsmith UINT32 Status = AE_OK; 20467754Smsmith 20567754Smsmith 20691116Smsmith ACPI_FUNCTION_TRACE ("EvInstallSciHandler"); 20767754Smsmith 20867754Smsmith 20983174Smsmith Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT->SciInt, 21083174Smsmith AcpiEvSciHandler, NULL); 21183174Smsmith return_ACPI_STATUS (Status); 21267754Smsmith} 21367754Smsmith 21467754Smsmith 21567754Smsmith/****************************************************************************** 21667754Smsmith * 21767754Smsmith * FUNCTION: AcpiEvRemoveSciHandler 21867754Smsmith * 21967754Smsmith * PARAMETERS: none 22067754Smsmith * 22167754Smsmith * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not 22267754Smsmith * installed to begin with 22367754Smsmith * 22491116Smsmith * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be 22591116Smsmith * taken. 22667754Smsmith * 22791116Smsmith * Note: It doesn't seem important to disable all events or set the event 22891116Smsmith * enable registers to their original values. The OS should disable 22991116Smsmith * the SCI interrupt level when the handler is removed, so no more 23091116Smsmith * events will come in. 23191116Smsmith * 23267754Smsmith ******************************************************************************/ 23367754Smsmith 23467754SmsmithACPI_STATUS 23567754SmsmithAcpiEvRemoveSciHandler (void) 23667754Smsmith{ 23799679Siwasaki ACPI_STATUS Status; 23899679Siwasaki 23999679Siwasaki 24091116Smsmith ACPI_FUNCTION_TRACE ("EvRemoveSciHandler"); 24167754Smsmith 24283174Smsmith 24391116Smsmith /* Just let the OS remove the handler and disable the level */ 24467754Smsmith 24599679Siwasaki Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT->SciInt, 24667754Smsmith AcpiEvSciHandler); 24767754Smsmith 24899679Siwasaki return_ACPI_STATUS (Status); 24967754Smsmith} 25067754Smsmith 25167754Smsmith 252