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
42 static inline uint64_t
counter_u64_read_one(uint64_t * p,int cpu)43 counter_u64_read_one(uint64_t *p, int cpu)
44 {
45
46 return (atomic_load_64((uint64_t *)zpcpu_get_cpu(p, cpu)));
47 }
48
49 static inline uint64_t
counter_u64_fetch_inline(uint64_t * p)50 counter_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
62 static void
counter_u64_zero_one_cpu(void * arg)63 counter_u64_zero_one_cpu(void *arg)
64 {
65
66 atomic_store_64((uint64_t *)zpcpu_get(arg), 0);
67 }
68
69 static inline void
counter_u64_zero_inline(counter_u64_t c)70 counter_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
80 static inline void
counter_u64_add(counter_u64_t c,int64_t inc)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__ */
88