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/11/sys/arm64/include/counter.h 328386 2018-01-25 02:45:21Z pkelsey $ 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 39static inline uint64_t 40counter_u64_read_one(uint64_t *p, int cpu) 41{ 42 43 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu)); 44} 45 46static inline uint64_t 47counter_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 59static void 60counter_u64_zero_one_cpu(void *arg) 61{ 62 63 *((uint64_t *)((char *)arg + sizeof(struct pcpu) * 64 PCPU_GET(cpuid))) = 0; 65} 66 67static inline void 68counter_u64_zero_inline(counter_u64_t c) 69{ 70 71 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 72 smp_no_rendezvous_barrier, c); 73} 74#endif 75 76#define counter_u64_add_protected(c, inc) counter_u64_add(c, inc) 77 78static inline void 79counter_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