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;
30extern void kperf_timer_reprogram(void);
31extern 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/* getters and setters on timers */
39extern unsigned kperf_timer_get_count(void);
40extern int kperf_timer_set_count(unsigned count);
41
42extern int kperf_timer_get_period( unsigned timer, uint64_t *period );
43extern int kperf_timer_set_period( unsigned timer, uint64_t period );
44
45extern int kperf_timer_get_action( unsigned timer, uint32_t *action );
46extern int kperf_timer_set_action( unsigned timer, uint32_t action );
47
48extern int kperf_timer_go(void);
49extern int kperf_timer_stop(void);
50
51extern unsigned kperf_timer_get_petid(void);
52extern int kperf_timer_set_petid(unsigned count);
53
54/* so PET thread can re-arm the timer */
55extern int kperf_timer_pet_set( unsigned timer, uint64_t elapsed_ticks );
56