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: stable/11/sys/arm/include/counter.h 328386 2018-01-25 02:45:21Z pkelsey $
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
40static inline uint64_t
41counter_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
48static inline uint64_t
49counter_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
61static void
62counter_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
69static inline void
70counter_u64_zero_inline(counter_u64_t c)
71{
72
73	smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
74	    smp_no_rendezvous_barrier, c);
75}
76#endif
77
78#define	counter_u64_add_protected(c, inc)	counter_u64_add(c, inc)
79
80static inline void
81counter_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__ */
88