1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 * $FreeBSD$
29 */
30
31 #ifndef __MACHINE_COUNTER_H__
32 #define __MACHINE_COUNTER_H__
33
34 #include <sys/pcpu.h>
35 #include <machine/atomic.h>
36
37 #define EARLY_COUNTER &__pcpu[0].pc_early_dummy_counter
38
39 #define counter_enter() do {} while (0)
40 #define counter_exit() do {} while (0)
41
42 #ifdef IN_SUBR_COUNTER_C
43
44 static inline uint64_t
45 counter_u64_read_one(uint64_t *p, int cpu)
46 {
47
48 return (atomic_load_64((uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE *
49 cpu)));
50 }
51
52 static inline uint64_t
53 counter_u64_fetch_inline(uint64_t *p)
54 {
55 uint64_t r;
56 int i;
57
58 r = 0;
59 CPU_FOREACH(i)
60 r += counter_u64_read_one((uint64_t *)p, i);
61
62 return (r);
63 }
64
65 static void
66 counter_u64_zero_one_cpu(void *arg)
67 {
68
69 atomic_store_64((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE *
70 PCPU_GET(cpuid)), 0);
71 }
72
73 static inline void
74 counter_u64_zero_inline(counter_u64_t c)
75 {
76
77 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
78 smp_no_rendezvous_barrier, c);
79 }
80 #endif
81
82 #define counter_u64_add_protected(c, inc) counter_u64_add(c, inc)
83
84 static inline void
85 counter_u64_add(counter_u64_t c, int64_t inc)
86 {
87
88 atomic_add_64((uint64_t *)zpcpu_get(c), inc);
89 }
90
91 #endif /* ! __MACHINE_COUNTER_H__ */
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