1 /*-
2 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/11.1/sys/arm/include/counter.h 313989 2017-02-20 10:44:24Z kib $
27 */
28
29 #ifndef __MACHINE_COUNTER_H__
30 #define __MACHINE_COUNTER_H__
31
32 #include <sys/pcpu.h>
33 #include <machine/atomic.h>
34
35 #define counter_enter() do {} while (0)
36 #define counter_exit() do {} while (0)
37
38 #ifdef IN_SUBR_COUNTER_C
39
40 static inline uint64_t
41 counter_u64_read_one(uint64_t *p, int cpu)
42 {
43
44 return (atomic_load_64((uint64_t *)((char *)p + sizeof(struct pcpu) *
45 cpu)));
46 }
47
48 static inline uint64_t
49 counter_u64_fetch_inline(uint64_t *p)
50 {
51 uint64_t r;
52 int i;
53
54 r = 0;
55 CPU_FOREACH(i)
56 r += counter_u64_read_one((uint64_t *)p, i);
57
58 return (r);
59 }
60
61 static void
62 counter_u64_zero_one_cpu(void *arg)
63 {
64
65 atomic_store_64((uint64_t *)((char *)arg + sizeof(struct pcpu) *
66 PCPU_GET(cpuid)), 0);
67 }
68
69 static inline void
70 counter_u64_zero_inline(counter_u64_t c)
71 {
72
73 smp_rendezvous(smp_no_rendevous_barrier, counter_u64_zero_one_cpu,
74 smp_no_rendevous_barrier, c);
75 }
76 #endif
77
78 #define counter_u64_add_protected(c, inc) counter_u64_add(c, inc)
79
80 static inline void
81 counter_u64_add(counter_u64_t c, int64_t inc)
82 {
83
84 atomic_add_64((uint64_t *)zpcpu_get(c), inc);
85 }
86
87 #endif /* ! __MACHINE_COUNTER_H__ */
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