iokit/Drivers/platform/drvAppleIntelClock/IntelClock.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 //
  26 // Backdoor hack for Intel Clock.
  27 //
  28 //
  29
  30 #include "AppleIntelClock.h"
  31
  32 #define super IOService
  33 OSDefineMetaClassAndStructors(AppleIntelClock, IOService);
  34
  35 extern "C" {
  36 extern void     hardclock(void);
  37 };
  38
  39 bool
  40 AppleIntelClock::start(IOService *provider)
  41 {
  42         if (!super::start(provider))
  43                 return false;
  44
  45         provider->registerInterrupt(kIRQ_Clock, 0, (IOInterruptAction) hardclock);
  46         provider->enableInterrupt(kIRQ_Clock);
  47
  48         publishResource("IORTC", this);
  49         return true;
  50 }