1 /*
2  * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice unmodified, this list of conditions, and the following
10  *    disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #ifndef _LINUX_TIMEKEEPING_H_
28 #define _LINUX_TIMEKEEPING_H_
29 
30 static inline u64 ktime_get_raw_ns(void)
31 {
32 	struct timespec ts;
33 
34 	nanouptime(&ts);
35 
36 	return (ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec;
37 }
38 
39 static inline ktime_t ktime_mono_to_real(ktime_t mono)
40 {
41 	return mono;
42 }
43 
44 static inline ktime_t ktime_get_real(void)
45 {
46 	return ktime_get_raw_ns();
47 }
48 
49 /* Include time spent in suspend state */
50 static inline ktime_t
51 ktime_get_boottime(void)
52 {
53 	return ktime_get_real();
54 }
55 
56 static inline s64
57 ktime_ms_delta(const ktime_t later, const ktime_t earlier)
58 {
59 	return (later - earlier) / NSEC_PER_MSEC;
60 }
61 
62 static inline void
63 do_gettimeofday(struct timeval *tv)
64 {
65 	microtime(tv);
66 }
67 
68 static inline ktime_t
69 ktime_get_raw(void)
70 {
71 	return ktime_get_raw_ns();
72 }
73 
74 #endif	/* _LINUX_TIMEKEEPING_H_ */
75