sys/contrib/dev/acpica-unix-20050211/events/evsci.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: evsci - System Control Interrupt configuration and
   4  *                      legacy to ACPI mode state transition functions
   5  *              $Revision: 95 $
   6  *
   7  ******************************************************************************/
   8
   9 /******************************************************************************
  10  *
  11  * 1. Copyright Notice
  12  *
  13  * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp.
  14  * All rights reserved.
  15  *
  16  * 2. License
  17  *
  18  * 2.1. This is your license from Intel Corp. under its intellectual property
  19  * rights.  You may have additional license terms from the party that provided
  20  * you this software, covering your right to use that party's intellectual
  21  * property rights.
  22  *
  23  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  24  * copy of the source code appearing in this file ("Covered Code") an
  25  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  26  * base code distributed originally by Intel ("Original Intel Code") to copy,
  27  * make derivatives, distribute, use and display any portion of the Covered
  28  * Code in any form, with the right to sublicense such rights; and
  29  *
  30  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  31  * license (with the right to sublicense), under only those claims of Intel
  32  * patents that are infringed by the Original Intel Code, to make, use, sell,
  33  * offer to sell, and import the Covered Code and derivative works thereof
  34  * solely to the minimum extent necessary to exercise the above copyright
  35  * license, and in no event shall the patent license extend to any additions
  36  * to or modifications of the Original Intel Code.  No other license or right
  37  * is granted directly or by implication, estoppel or otherwise;
  38  *
  39  * The above copyright and patent license is granted only if the following
  40  * conditions are met:
  41  *
  42  * 3. Conditions
  43  *
  44  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  45  * Redistribution of source code of any substantial portion of the Covered
  46  * Code or modification with rights to further distribute source must include
  47  * the above Copyright Notice, the above License, this list of Conditions,
  48  * and the following Disclaimer and Export Compliance provision.  In addition,
  49  * Licensee must cause all Covered Code to which Licensee contributes to
  50  * contain a file documenting the changes Licensee made to create that Covered
  51  * Code and the date of any change.  Licensee must include in that file the
  52  * documentation of any changes made by any predecessor Licensee.  Licensee
  53  * must include a prominent statement that the modification is derived,
  54  * directly or indirectly, from Original Intel Code.
  55  *
  56  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  57  * Redistribution of source code of any substantial portion of the Covered
  58  * Code or modification without rights to further distribute source must
  59  * include the following Disclaimer and Export Compliance provision in the
  60  * documentation and/or other materials provided with distribution.  In
  61  * addition, Licensee may not authorize further sublicense of source of any
  62  * portion of the Covered Code, and must include terms to the effect that the
  63  * license from Licensee to its licensee is limited to the intellectual
  64  * property embodied in the software Licensee provides to its licensee, and
  65  * not to intellectual property embodied in modifications its licensee may
  66
  67  * make.
  68  *
  69  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  70  * substantial portion of the Covered Code or modification must reproduce the
  71  * above Copyright Notice, and the following Disclaimer and Export Compliance
  72  * provision in the documentation and/or other materials provided with the
  73  * distribution.
  74  *
  75  * 3.4. Intel retains all right, title, and interest in and to the Original
  76  * Intel Code.
  77  *
  78  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  79  * Intel shall be used in advertising or otherwise to promote the sale, use or
  80  * other dealings in products derived from or relating to the Covered Code
  81  * without prior written authorization from Intel.
  82  *
  83  * 4. Disclaimer and Export Compliance
  84  *
  85  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  86  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  87  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  88  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  89  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  90  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  91  * PARTICULAR PURPOSE.
  92  *
  93  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  94  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  95  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  96  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  97  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  98  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  99  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
 100  * LIMITED REMEDY.
 101  *
 102  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 103  * software or system incorporating such software without first obtaining any
 104  * required license or other approval from the U. S. Department of Commerce or
 105  * any other agency or department of the United States Government.  In the
 106  * event Licensee exports any such software from the United States or
 107  * re-exports any such software from a foreign destination, Licensee shall
 108  * ensure that the distribution and export/re-export of the software is in
 109  * compliance with all laws, regulations, orders, or other restrictions of the
 110  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 111  * any of its subsidiaries will export/re-export any technical data, process,
 112  * software, or service, directly or indirectly, to any country for which the
 113  * United States government or any agency thereof requires an export license,
 114  * other governmental approval, or letter of assurance, without first obtaining
 115  * such license, approval or letter.
 116  *
 117  *****************************************************************************/
 118
 119 #include "acpi.h"
 120 #include "acevents.h"
 121
 122
 123 #define _COMPONENT          ACPI_EVENTS
 124         ACPI_MODULE_NAME    ("evsci")
 125
 126
 127 /*******************************************************************************
 128  *
 129  * FUNCTION:    AcpiEvSciXruptHandler
 130  *
 131  * PARAMETERS:  Context   - Calling Context
 132  *
 133  * RETURN:      Status code indicates whether interrupt was handled.
 134  *
 135  * DESCRIPTION: Interrupt handler that will figure out what function or
 136  *              control method to call to deal with a SCI.
 137  *
 138  ******************************************************************************/
 139
 140 static UINT32 ACPI_SYSTEM_XFACE
 141 AcpiEvSciXruptHandler (
 142     void                    *Context)
 143 {
 144     ACPI_GPE_XRUPT_INFO     *GpeXruptList = Context;
 145     UINT32                  InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
 146
 147
 148     ACPI_FUNCTION_TRACE("EvSciXruptHandler");
 149
 150
 151     /*
 152      * We are guaranteed by the ACPI CA initialization/shutdown code that
 153      * if this interrupt handler is installed, ACPI is enabled.
 154      */
 155
 156     /*
 157      * Fixed Events:
 158      * Check for and dispatch any Fixed Events that have occurred
 159      */
 160     InterruptHandled |= AcpiEvFixedEventDetect ();
 161
 162     /*
 163      * General Purpose Events:
 164      * Check for and dispatch any GPEs that have occurred
 165      */
 166     InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
 167
 168     return_VALUE (InterruptHandled);
 169 }
 170
 171
 172 /*******************************************************************************
 173  *
 174  * FUNCTION:    AcpiEvGpeXruptHandler
 175  *
 176  * PARAMETERS:  Context   - Calling Context
 177  *
 178  * RETURN:      Status code indicates whether interrupt was handled.
 179  *
 180  * DESCRIPTION: Handler for GPE Block Device interrupts
 181  *
 182  ******************************************************************************/
 183
 184 UINT32 ACPI_SYSTEM_XFACE
 185 AcpiEvGpeXruptHandler (
 186     void                    *Context)
 187 {
 188     ACPI_GPE_XRUPT_INFO     *GpeXruptList = Context;
 189     UINT32                  InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
 190
 191
 192     ACPI_FUNCTION_TRACE("EvGpeXruptHandler");
 193
 194
 195     /*
 196      * We are guaranteed by the ACPI CA initialization/shutdown code that
 197      * if this interrupt handler is installed, ACPI is enabled.
 198      */
 199
 200     /*
 201      * GPEs:
 202      * Check for and dispatch any GPEs that have occurred
 203      */
 204     InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
 205
 206     return_VALUE (InterruptHandled);
 207 }
 208
 209
 210 /******************************************************************************
 211  *
 212  * FUNCTION:    AcpiEvInstallSciHandler
 213  *
 214  * PARAMETERS:  none
 215  *
 216  * RETURN:      Status
 217  *
 218  * DESCRIPTION: Installs SCI handler.
 219  *
 220  ******************************************************************************/
 221
 222 UINT32
 223 AcpiEvInstallSciHandler (void)
 224 {
 225     UINT32                  Status = AE_OK;
 226
 227
 228     ACPI_FUNCTION_TRACE ("EvInstallSciHandler");
 229
 230
 231     Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT->SciInt,
 232                         AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead);
 233     return_ACPI_STATUS (Status);
 234 }
 235
 236
 237 /******************************************************************************
 238  *
 239  * FUNCTION:    AcpiEvRemoveSciHandler
 240  *
 241  * PARAMETERS:  none
 242  *
 243  * RETURN:      E_OK if handler uninstalled OK, E_ERROR if handler was not
 244  *              installed to begin with
 245  *
 246  * DESCRIPTION: Remove the SCI interrupt handler.  No further SCIs will be
 247  *              taken.
 248  *
 249  * Note:  It doesn't seem important to disable all events or set the event
 250  *        enable registers to their original values.  The OS should disable
 251  *        the SCI interrupt level when the handler is removed, so no more
 252  *        events will come in.
 253  *
 254  ******************************************************************************/
 255
 256 ACPI_STATUS
 257 AcpiEvRemoveSciHandler (void)
 258 {
 259     ACPI_STATUS             Status;
 260
 261
 262     ACPI_FUNCTION_TRACE ("EvRemoveSciHandler");
 263
 264
 265     /* Just let the OS remove the handler and disable the level */
 266
 267     Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT->SciInt,
 268                                     AcpiEvSciXruptHandler);
 269
 270     return_ACPI_STATUS (Status);
 271 }
 272
 273