osfmk/kperf/timetrigger.h

   1 /*
   2  * Copyright (c) 2011 Apple Computer, 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 // extern uint64_t timer_period;
  30 extern void kperf_timer_reprogram(void);
  31 extern void kperf_timer_reprogram_all(void);
  32
  33
  34 // return values from the action
  35 #define TIMER_REPROGRAM (0)
  36 #define TIMER_STOP (1)
  37
  38 /* blah */
  39 extern unsigned kperf_timer_get_count(void);
  40 extern int kperf_timer_set_count(unsigned count);
  41
  42 extern int kperf_timer_get_period( unsigned timer, uint64_t *period );
  43 extern int kperf_timer_set_period( unsigned timer, uint64_t period );
  44
  45 extern int kperf_timer_go(void);
  46 extern int kperf_timer_stop(void);
  47
  48 extern unsigned kperf_timer_get_petid(void);
  49 extern int kperf_timer_set_petid(unsigned count);
  50
  51 /* so PET thread can re-arm the timer */
  52 extern int kperf_timer_pet_set( unsigned timer );