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: releng/12.0/sys/arm/include/counter.h 336020 2018-07-06 02:06:03Z mmacy $
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 extern struct pcpu __pcpu[];
38
39 #define EARLY_COUNTER &__pcpu[0].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
45
46 static inline uint64_t
47 counter_u64_read_one(uint64_t *p, int cpu)
48 {
49
50 return (atomic_load_64((uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE *
51 cpu)));
52 }
53
54 static inline uint64_t
55 counter_u64_fetch_inline(uint64_t *p)
56 {
57 uint64_t r;
58 int i;
59
60 r = 0;
61 CPU_FOREACH(i)
62 r += counter_u64_read_one((uint64_t *)p, i);
63
64 return (r);
65 }
66
67 static void
68 counter_u64_zero_one_cpu(void *arg)
69 {
70
71 atomic_store_64((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE *
72 PCPU_GET(cpuid)), 0);
73 }
74
75 static inline void
76 counter_u64_zero_inline(counter_u64_t c)
77 {
78
79 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
80 smp_no_rendezvous_barrier, c);
81 }
82 #endif
83
84 #define counter_u64_add_protected(c, inc) counter_u64_add(c, inc)
85
86 static inline void
87 counter_u64_add(counter_u64_t c, int64_t inc)
88 {
89
90 atomic_add_64((uint64_t *)zpcpu_get(c), inc);
91 }
92
93 #endif /* ! __MACHINE_COUNTER_H__ */
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