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 #ifdef INVARIANTS 34 #include <sys/proc.h> 35 #endif 36 37 extern struct pcpu __pcpu[]; 38 39 #define EARLY_COUNTER &__pcpu[0].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 static inline uint64_t 46 counter_u64_read_one(uint64_t *p, int cpu) 47 { 48 49 return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu)); 50 } 51 52 static inline uint64_t 53 counter_u64_fetch_inline(uint64_t *p) 54 { 55 uint64_t r; 56 int i; 57 58 r = 0; 59 for (i = 0; i < mp_ncpus; i++) 60 r += counter_u64_read_one((uint64_t *)p, i); 61 62 return (r); 63 } 64 65 /* XXXKIB might interrupt increment */ 66 static void 67 counter_u64_zero_one_cpu(void *arg) 68 { 69 70 *((uint64_t *)((char *)arg + sizeof(struct pcpu) * 71 PCPU_GET(cpuid))) = 0; 72 } 73 74 static inline void 75 counter_u64_zero_inline(counter_u64_t c) 76 { 77 78 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 79 smp_no_rendezvous_barrier, c); 80 } 81 #endif 82 83 #define counter_u64_add_protected(c, inc) do { \ 84 CRITICAL_ASSERT(curthread); \ 85 *(uint64_t *)zpcpu_get(c) += (inc); \ 86 } while (0) 87 88 static inline void 89 counter_u64_add(counter_u64_t c, int64_t inc) 90 { 91 92 counter_enter(); 93 counter_u64_add_protected(c, inc); 94 counter_exit(); 95 } 96 97 #endif /* ! _MACHINE_COUNTER_H_ */ 98