1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #ifdef __i386__ 32 #include <i386/counter.h> 33 #else /* !__i386__ */ 34 35 #ifndef __MACHINE_COUNTER_H__ 36 #define __MACHINE_COUNTER_H__ 37 38 #include <sys/pcpu.h> 39 #include <sys/kassert.h> 40 41 #define EARLY_COUNTER (void *)__offsetof(struct pcpu, pc_early_dummy_counter) 42 43 #define counter_enter() do {} while (0) 44 #define counter_exit() do {} while (0) 45 46 #ifdef IN_SUBR_COUNTER_C 47 static inline uint64_t 48 counter_u64_read_one(counter_u64_t c, int cpu) 49 { 50 51 MPASS(c != EARLY_COUNTER); 52 return (*zpcpu_get_cpu(c, cpu)); 53 } 54 55 static inline uint64_t 56 counter_u64_fetch_inline(uint64_t *c) 57 { 58 uint64_t r; 59 int cpu; 60 61 r = 0; 62 CPU_FOREACH(cpu) 63 r += counter_u64_read_one(c, cpu); 64 65 return (r); 66 } 67 68 static void 69 counter_u64_zero_one_cpu(void *arg) 70 { 71 counter_u64_t c; 72 73 c = arg; 74 MPASS(c != EARLY_COUNTER); 75 *(zpcpu_get(c)) = 0; 76 } 77 78 static inline void 79 counter_u64_zero_inline(counter_u64_t c) 80 { 81 82 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 83 smp_no_rendezvous_barrier, c); 84 } 85 #endif 86 87 #define counter_u64_add_protected(c, i) counter_u64_add(c, i) 88 89 static inline void 90 counter_u64_add(counter_u64_t c, int64_t inc) 91 { 92 93 KASSERT(IS_BSP() || c != EARLY_COUNTER, ("EARLY_COUNTER used on AP")); 94 zpcpu_add(c, inc); 95 } 96 97 #endif /* ! __MACHINE_COUNTER_H__ */ 98 99 #endif /* __i386__ */ 100