1 /*
2  * Copyright (c) 2008 Travis Geiselbrecht
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining
5  * a copy of this software and associated documentation files
6  * (the "Software"), to deal in the Software without restriction,
7  * including without limitation the rights to use, copy, modify, merge,
8  * publish, distribute, sublicense, and/or sell copies of the Software,
9  * and to permit persons to whom the Software is furnished to do so,
10  * subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be
13  * included in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22  */
23 #ifndef __PLATFORM_TIMER_H
24 #define __PLATFORM_TIMER_H
25 
26 #include <sys/types.h>
27 
28 typedef enum handler_return (*platform_timer_callback)(void *arg,
29                              lk_time_ns_t now);
30 
31 status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, lk_time_t interval);
32 
33 #if PLATFORM_HAS_DYNAMIC_TIMER
34 status_t platform_set_oneshot_timer(platform_timer_callback callback,
35                                     lk_time_ns_t time_ns);
36 void     platform_stop_timer(void);
37 #endif
38 
39 struct platform_timer_state {
40 	uint64_t tval;  /* timer counter */
41 	uint64_t cval;  /* timer comparator */
42 };
43 
44 void platform_export_timer_state(struct platform_timer_state *ts, bool raw);
45 
46 #endif
47 
48