2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
31 #ifndef __MACHINE_COUNTER_H__
32 #define __MACHINE_COUNTER_H__
39 extern struct pcpu dummy_pcpu[];
40 #define EARLY_COUNTER &dummy_pcpu[0].pc_early_dummy_counter
42 #define counter_enter() critical_enter()
43 #define counter_exit() critical_exit()
45 #ifdef IN_SUBR_COUNTER_C
46 static inline uint64_t
47 counter_u64_read_one(uint64_t *p, int cpu)
50 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu));
53 static inline uint64_t
54 counter_u64_fetch_inline(uint64_t *p)
60 for (i = 0; i < mp_ncpus; i++)
61 r += counter_u64_read_one((uint64_t *)p, i);
66 /* XXXKIB might interrupt increment */
68 counter_u64_zero_one_cpu(void *arg)
71 *((uint64_t *)((char *)arg + sizeof(struct pcpu) *
72 PCPU_GET(cpuid))) = 0;
76 counter_u64_zero_inline(counter_u64_t c)
79 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
80 smp_no_rendezvous_barrier, c);
84 #define counter_u64_add_protected(c, inc) do { \
85 CRITICAL_ASSERT(curthread); \
86 *(uint64_t *)zpcpu_get(c) += (inc); \
90 counter_u64_add(counter_u64_t c, int64_t inc)
94 counter_u64_add_protected(c, inc);
98 #endif /* ! __MACHINE_COUNTER_H__ */