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