1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Konstantin Belousov <[email protected]> 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 #ifdef INVARIANTS 36 #include <sys/proc.h> 37 #endif 38 39 #define EARLY_COUNTER &((struct pcpu *)pcpu_space)->pc_early_dummy_counter 40 41 #define counter_enter() critical_enter() 42 #define counter_exit() critical_exit() 43 44 #ifdef IN_SUBR_COUNTER_C 45 /* XXXKIB non-atomic 64bit read on 32bit */ 46 static inline uint64_t 47 counter_u64_read_one(uint64_t *p, int cpu) 48 { 49 50 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu)); 51 } 52 53 static inline uint64_t 54 counter_u64_fetch_inline(uint64_t *p) 55 { 56 uint64_t r; 57 int i; 58 59 r = 0; 60 for (i = 0; i < mp_ncpus; i++) 61 r += counter_u64_read_one((uint64_t *)p, i); 62 63 return (r); 64 } 65 66 /* XXXKIB non-atomic 64bit store on 32bit, might interrupt increment */ 67 static void 68 counter_u64_zero_one_cpu(void *arg) 69 { 70 71 *((uint64_t *)((char *)arg + sizeof(struct pcpu) * 72 PCPU_GET(cpuid))) = 0; 73 } 74 75 static inline void 76 counter_u64_zero_inline(counter_u64_t c) 77 { 78 79 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 80 smp_no_rendezvous_barrier, c); 81 } 82 #endif 83 84 #define counter_u64_add_protected(c, inc) do { \ 85 CRITICAL_ASSERT(curthread); \ 86 *(uint64_t *)zpcpu_get(c) += (inc); \ 87 } while (0) 88 89 static inline void 90 counter_u64_add(counter_u64_t c, int64_t inc) 91 { 92 93 counter_enter(); 94 counter_u64_add_protected(c, inc); 95 counter_exit(); 96 } 97 98 #endif /* ! __MACHINE_COUNTER_H__ */ 99