1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 Konstantin Belousov <[email protected]>
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
36 #define EARLY_COUNTER (void *)__offsetof(struct pcpu, pc_early_dummy_counter)
37
38 #define counter_enter() do {} while (0)
39 #define counter_exit() do {} while (0)
40
41 #ifdef IN_SUBR_COUNTER_C
42 static inline uint64_t
counter_u64_read_one(counter_u64_t c,int cpu)43 counter_u64_read_one(counter_u64_t c, int cpu)
44 {
45
46 MPASS(c != EARLY_COUNTER);
47 return (*zpcpu_get_cpu(c, cpu));
48 }
49
50 static inline uint64_t
counter_u64_fetch_inline(uint64_t * c)51 counter_u64_fetch_inline(uint64_t *c)
52 {
53 uint64_t r;
54 int cpu;
55
56 r = 0;
57 CPU_FOREACH(cpu)
58 r += counter_u64_read_one(c, cpu);
59
60 return (r);
61 }
62
63 static void
counter_u64_zero_one_cpu(void * arg)64 counter_u64_zero_one_cpu(void *arg)
65 {
66 counter_u64_t c;
67
68 c = arg;
69 MPASS(c != EARLY_COUNTER);
70 *(zpcpu_get(c)) = 0;
71 }
72
73 static inline void
counter_u64_zero_inline(counter_u64_t c)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, i) counter_u64_add(c, i)
83
84 static inline void
counter_u64_add(counter_u64_t c,int64_t inc)85 counter_u64_add(counter_u64_t c, int64_t inc)
86 {
87
88 KASSERT(IS_BSP() || c != EARLY_COUNTER, ("EARLY_COUNTER used on AP"));
89 zpcpu_add(c, inc);
90 }
91
92 #endif /* ! __MACHINE_COUNTER_H__ */
93