2 * Copyright (c) 2012, 2013 Konstantin Belousov <kib@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef __MACHINE_COUNTER_H__
30 #define __MACHINE_COUNTER_H__
39 #define counter_enter() do {} while (0)
40 #define counter_exit() do {} while (0)
42 #ifdef IN_SUBR_COUNTER_C
43 static inline uint64_t
44 counter_u64_read_one(uint64_t *p, int cpu)
47 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu));
50 static inline uint64_t
51 counter_u64_fetch_inline(uint64_t *p)
57 for (i = 0; i < mp_ncpus; i++)
58 r += counter_u64_read_one((uint64_t *)p, i);
64 counter_u64_zero_one_cpu(void *arg)
67 *((uint64_t *)((char *)arg + sizeof(struct pcpu) *
68 PCPU_GET(cpuid))) = 0;
72 counter_u64_zero_inline(counter_u64_t c)
75 smp_rendezvous(smp_no_rendevous_barrier, counter_u64_zero_one_cpu,
76 smp_no_rendevous_barrier, c);
80 #define counter_u64_add_protected(c, i) counter_u64_add(c, i)
82 extern struct pcpu __pcpu[MAXCPU];
85 counter_u64_add(counter_u64_t c, int64_t inc)
92 "ldarx %1, %0, %2\n\t"
94 "stdcx. %1, %0, %2\n\t"
96 : "=&b" (ccpu), "=&r" (old)
97 : "r" ((char *)c - (char *)&__pcpu[0]), "r" (inc)
103 #define counter_enter() critical_enter()
104 #define counter_exit() critical_exit()
106 #ifdef IN_SUBR_COUNTER_C
107 /* XXXKIB non-atomic 64bit read */
108 static inline uint64_t
109 counter_u64_read_one(uint64_t *p, int cpu)
112 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu));
115 static inline uint64_t
116 counter_u64_fetch_inline(uint64_t *p)
122 for (i = 0; i < mp_ncpus; i++)
123 r += counter_u64_read_one((uint64_t *)p, i);
128 /* XXXKIB non-atomic 64bit store, might interrupt increment */
130 counter_u64_zero_one_cpu(void *arg)
133 *((uint64_t *)((char *)arg + sizeof(struct pcpu) *
134 PCPU_GET(cpuid))) = 0;
138 counter_u64_zero_inline(counter_u64_t c)
141 smp_rendezvous(smp_no_rendevous_barrier, counter_u64_zero_one_cpu,
142 smp_no_rendevous_barrier, c);
146 #define counter_u64_add_protected(c, inc) do { \
147 CRITICAL_ASSERT(curthread); \
148 *(uint64_t *)zpcpu_get(c) += (inc); \
152 counter_u64_add(counter_u64_t c, int64_t inc)
156 counter_u64_add_protected(c, inc);
162 #endif /* ! __MACHINE_COUNTER_H__ */