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