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#ifdef __i386__
30#include <i386/counter.h>
31#else /* !__i386__ */
32
33#ifndef __MACHINE_COUNTER_H__
34#define __MACHINE_COUNTER_H__
35
36#include <sys/pcpu.h>
37#include <sys/kassert.h>
38
39#define	EARLY_COUNTER	(void *)__offsetof(struct pcpu, pc_early_dummy_counter)
40
41#define	counter_enter()	do {} while (0)
42#define	counter_exit()	do {} while (0)
43
44#ifdef IN_SUBR_COUNTER_C
45static inline uint64_t
46counter_u64_read_one(counter_u64_t c, int cpu)
47{
48
49	MPASS(c != EARLY_COUNTER);
50	return (*zpcpu_get_cpu(c, cpu));
51}
52
53static inline uint64_t
54counter_u64_fetch_inline(uint64_t *c)
55{
56	uint64_t r;
57	int cpu;
58
59	r = 0;
60	CPU_FOREACH(cpu)
61		r += counter_u64_read_one(c, cpu);
62
63	return (r);
64}
65
66static void
67counter_u64_zero_one_cpu(void *arg)
68{
69	counter_u64_t c;
70
71	c = arg;
72	MPASS(c != EARLY_COUNTER);
73	*(zpcpu_get(c)) = 0;
74}
75
76static inline void
77counter_u64_zero_inline(counter_u64_t c)
78{
79
80	smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
81	    smp_no_rendezvous_barrier, c);
82}
83#endif
84
85#define	counter_u64_add_protected(c, i)	counter_u64_add(c, i)
86
87static inline void
88counter_u64_add(counter_u64_t c, int64_t inc)
89{
90
91	KASSERT(IS_BSP() || c != EARLY_COUNTER, ("EARLY_COUNTER used on AP"));
92	zpcpu_add(c, inc);
93}
94
95#endif	/* ! __MACHINE_COUNTER_H__ */
96
97#endif /* __i386__ */
98