osfmk/i386/rtclock_protos.h

   1 /*
   2  * Copyright (c) 2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * @APPLE_FREE_COPYRIGHT@
  33  */
  34 /*
  35  *      File:           rtclock_protos.h
  36  *      Purpose:        C Routines for handling the machine dependent
  37  *                              real-time clock.
  38  */
  39
  40 #ifndef _I386_RTCLOCK_PROTOS_H_
  41 #define _I386_RTCLOCK_PROTOS_H_
  42
  43 typedef struct pal_rtc_nanotime pal_rtc_nanotime_t;
  44 extern uint64_t tsc_rebase_abs_time;
  45
  46 extern void     _rtc_nanotime_adjust(
  47                         uint64_t                tsc_base_delta,
  48                         pal_rtc_nanotime_t      *dst);
  49
  50 extern uint64_t _rtc_nanotime_read(
  51                         pal_rtc_nanotime_t      *rntp);
  52
  53 extern uint64_t _rtc_tsc_to_nanoseconds(
  54                         uint64_t    value,
  55                         pal_rtc_nanotime_t      *rntp);
  56
  57 extern void     rtclock_intr(x86_saved_state_t *regs);
  58
  59
  60 /*
  61  * Timer control.
  62  */
  63 typedef struct {
  64         void     (*rtc_config)(void);
  65         uint64_t (*rtc_set)   (uint64_t, uint64_t);
  66 } rtc_timer_t;
  67 extern rtc_timer_t      *rtc_timer;
  68
  69 extern void             rtc_timer_init(void);
  70
  71 extern void             rtclock_early_init(void);
  72 extern void             rtc_nanotime_init(uint64_t);
  73 extern void             rtc_decrementer_configure(void);
  74 #endif /* _I386_RTCLOCK_PROTOS_H_ */