1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
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	EARLY_COUNTER	&__pcpu[0].pc_early_dummy_counter
36
37#define	counter_enter()	do {} while (0)
38#define	counter_exit()	do {} while (0)
39
40#ifdef IN_SUBR_COUNTER_C
41
42static inline uint64_t
43counter_u64_read_one(uint64_t *p, int cpu)
44{
45
46	return (atomic_load_64((uint64_t *)zpcpu_get_cpu(p, cpu)));
47}
48
49static inline uint64_t
50counter_u64_fetch_inline(uint64_t *p)
51{
52	uint64_t r;
53	int i;
54
55	r = 0;
56	CPU_FOREACH(i)
57		r += counter_u64_read_one((uint64_t *)p, i);
58
59	return (r);
60}
61
62static void
63counter_u64_zero_one_cpu(void *arg)
64{
65
66	atomic_store_64((uint64_t *)zpcpu_get(arg), 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