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 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_COUNTER_H_ 30 #define _MACHINE_COUNTER_H_ 31 32 #include <sys/pcpu.h> 33 #include <machine/atomic.h> 34 35 #define counter_enter() do {} while (0) 36 #define counter_exit() do {} while (0) 37 38 #ifdef IN_SUBR_COUNTER_C 39 static inline uint64_t 40 counter_u64_read_one(uint64_t *p, int cpu) 41 { 42 43 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu)); 44 } 45 46 static inline uint64_t 47 counter_u64_fetch_inline(uint64_t *p) 48 { 49 uint64_t r; 50 int i; 51 52 r = 0; 53 CPU_FOREACH(i) 54 r += counter_u64_read_one((uint64_t *)p, i); 55 56 return (r); 57 } 58 59 static void 60 counter_u64_zero_one_cpu(void *arg) 61 { 62 63 *((uint64_t *)((char *)arg + sizeof(struct pcpu) * 64 PCPU_GET(cpuid))) = 0; 65 } 66 67 static inline void 68 counter_u64_zero_inline(counter_u64_t c) 69 { 70 71 smp_rendezvous(smp_no_rendevous_barrier, counter_u64_zero_one_cpu, 72 smp_no_rendevous_barrier, c); 73 } 74 #endif 75 76 #define counter_u64_add_protected(c, inc) counter_u64_add(c, inc) 77 78 static inline void 79 counter_u64_add(counter_u64_t c, int64_t inc) 80 { 81 82 atomic_add_64((uint64_t *)zpcpu_get(c), inc); 83 } 84 85 #endif /* ! _MACHINE_COUNTER_H_ */ 86