1 | /* $NetBSD: delay.h,v 1.4 2016/02/19 21:08:19 skrll 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_DELAY_H_ |
33 | #define _LINUX_DELAY_H_ |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/kernel.h> |
37 | #include <sys/proc.h> |
38 | |
39 | #include <machine/param.h> |
40 | |
41 | #define MAX_UDELAY_MS 5 |
42 | |
43 | static inline void |
44 | udelay(unsigned int usec) |
45 | { |
46 | DELAY(usec); |
47 | } |
48 | |
49 | static inline void |
50 | usleep_range(unsigned long minimum, unsigned long maximum __unused) |
51 | { |
52 | DELAY(minimum); |
53 | } |
54 | |
55 | static inline void |
56 | mdelay(unsigned int msec) |
57 | { |
58 | |
59 | if (msec < MAX_UDELAY_MS) |
60 | udelay(msec * 1000); |
61 | else |
62 | while (msec--) |
63 | udelay(1000); |
64 | } |
65 | |
66 | static inline void |
67 | msleep(unsigned int msec) |
68 | { |
69 | if (cold || |
70 | ((hz < 1000) && (msec < (1000/hz)))) |
71 | mdelay(msec); |
72 | else |
73 | (void)kpause("lnxmslep" , false, mstohz(msec), NULL); |
74 | } |
75 | |
76 | static inline void |
77 | ndelay(unsigned int nsec) |
78 | { |
79 | |
80 | DELAY(nsec / 1000); |
81 | } |
82 | |
83 | #endif /* _LINUX_DELAY_H_ */ |
84 | |