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