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: stable/12/sys/riscv/include/counter.h 354093 2019-10-25 18:56:46Z mav $
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 EARLY_COUNTER &__pcpu[0].pc_early_dummy_counter
38
39 #define counter_enter() critical_enter()
40 #define counter_exit() critical_exit()
41
42 #ifdef IN_SUBR_COUNTER_C
43 static inline uint64_t
counter_u64_read_one(uint64_t * p,int cpu)44 counter_u64_read_one(uint64_t *p, int cpu)
45 {
46
47 return (*(uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE * cpu));
48 }
49
50 static inline uint64_t
counter_u64_fetch_inline(uint64_t * p)51 counter_u64_fetch_inline(uint64_t *p)
52 {
53 uint64_t r;
54 int i;
55
56 r = 0;
57 for (i = 0; i < mp_ncpus; i++)
58 r += counter_u64_read_one((uint64_t *)p, i);
59
60 return (r);
61 }
62
63 /* XXXKIB might interrupt increment */
64 static void
counter_u64_zero_one_cpu(void * arg)65 counter_u64_zero_one_cpu(void *arg)
66 {
67
68 *((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE *
69 PCPU_GET(cpuid))) = 0;
70 }
71
72 static inline void
counter_u64_zero_inline(counter_u64_t c)73 counter_u64_zero_inline(counter_u64_t c)
74 {
75
76 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
77 smp_no_rendezvous_barrier, c);
78 }
79 #endif
80
81 #define counter_u64_add_protected(c, inc) do { \
82 CRITICAL_ASSERT(curthread); \
83 *(uint64_t *)zpcpu_get(c) += (inc); \
84 } while (0)
85
86 static inline void
counter_u64_add(counter_u64_t c,int64_t inc)87 counter_u64_add(counter_u64_t c, int64_t inc)
88 {
89
90 counter_enter();
91 counter_u64_add_protected(c, inc);
92 counter_exit();
93 }
94
95 #endif /* ! _MACHINE_COUNTER_H_ */
96