1 /*-
2 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/11.0/sys/mips/include/counter.h 252434 2013-07-01 02:48:27Z kib $
27 */
28
29 #ifndef __MACHINE_COUNTER_H__
30 #define __MACHINE_COUNTER_H__
31
32 #include <sys/pcpu.h>
33 #ifdef INVARIANTS
34 #include <sys/proc.h>
35 #endif
36
37 #define counter_enter() critical_enter()
38 #define counter_exit() critical_exit()
39
40 #ifdef IN_SUBR_COUNTER_C
41 /* XXXKIB non-atomic 64bit read on 32bit */
42 static inline uint64_t
43 counter_u64_read_one(uint64_t *p, int cpu)
44 {
45
46 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu));
47 }
48
49 static inline uint64_t
50 counter_u64_fetch_inline(uint64_t *p)
51 {
52 uint64_t r;
53 int i;
54
55 r = 0;
56 for (i = 0; i < mp_ncpus; i++)
57 r += counter_u64_read_one((uint64_t *)p, i);
58
59 return (r);
60 }
61
62 /* XXXKIB non-atomic 64bit store on 32bit, might interrupt increment */
63 static void
64 counter_u64_zero_one_cpu(void *arg)
65 {
66
67 *((uint64_t *)((char *)arg + sizeof(struct pcpu) *
68 PCPU_GET(cpuid))) = 0;
69 }
70
71 static inline void
72 counter_u64_zero_inline(counter_u64_t c)
73 {
74
75 smp_rendezvous(smp_no_rendevous_barrier, counter_u64_zero_one_cpu,
76 smp_no_rendevous_barrier, c);
77 }
78 #endif
79
80 #define counter_u64_add_protected(c, inc) do { \
81 CRITICAL_ASSERT(curthread); \
82 *(uint64_t *)zpcpu_get(c) += (inc); \
83 } while (0)
84
85 static inline void
86 counter_u64_add(counter_u64_t c, int64_t inc)
87 {
88
89 counter_enter();
90 counter_u64_add_protected(c, inc);
91 counter_exit();
92 }
93
94 #endif /* ! __MACHINE_COUNTER_H__ */
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