1/* $NetBSD: jiffies.h,v 1.6 2014/07/26 14:24:08 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _LINUX_JIFFIES_H_
33#define _LINUX_JIFFIES_H_
34
35#include <sys/param.h>
36#include <sys/kernel.h>
37
38#define jiffies hardclock_ticks
39#define jiffies_64 hardclock_ticks /* XXX */
40
41/* XXX Er, what? */
42#define MAX_JIFFY_OFFSET ((INT_MAX >> 1) - 1)
43
44static inline unsigned int
45msecs_to_jiffies(unsigned int msec)
46{
47 return mstohz(msec);
48}
49
50static inline unsigned int
51jiffies_to_msecs(unsigned int j)
52{
53 return hztoms(j);
54}
55
56static inline unsigned int
57usecs_to_jiffies(unsigned int usec)
58{
59 const struct timeval tv = {
60 .tv_sec = usec / 1000000,
61 .tv_usec = usec % 1000000,
62 };
63
64 return tvtohz(&tv);
65}
66
67static inline unsigned int
68timespec_to_jiffies(const struct timespec *ts)
69{
70 return tstohz(ts);
71}
72
73/* XXX long is the wrong type here times... */
74
75#define __linux_time_compare(A, OP, B) (((long)(A) - (long)(B)) OP 0)
76
77static inline bool
78time_after(unsigned long a, unsigned long b)
79{
80 return __linux_time_compare(a, >, b);
81}
82
83static inline bool
84time_after_eq(unsigned long a, unsigned long b)
85{
86 return __linux_time_compare(a, >=, b);
87}
88
89static inline bool
90time_before(unsigned long a, unsigned long b)
91{
92 return __linux_time_compare(a, <, b);
93}
94
95static inline bool
96time_before_eq(unsigned long a, unsigned long b)
97{
98 return __linux_time_compare(a, <=, b);
99}
100
101#endif /* _LINUX_JIFFIES_H_ */
102