1 /*- 2 * Copyright (c) 2012, 2013 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 #if defined(AIM) && defined(__powerpc64__) 38 39 #define counter_enter() do {} while (0) 40 #define counter_exit() do {} while (0) 41 42 #define counter_u64_add_protected(c, i) counter_u64_add(c, i) 43 44 extern struct pcpu __pcpu[MAXCPU]; 45 46 static inline void 47 counter_u64_add(counter_u64_t c, int64_t inc) 48 { 49 uint64_t ccpu, old; 50 51 __asm __volatile("\n" 52 "1:\n\t" 53 "mfsprg %0, 0\n\t" 54 "ldarx %1, %0, %2\n\t" 55 "add %1, %1, %3\n\t" 56 "stdcx. %1, %0, %2\n\t" 57 "bne- 1b" 58 : "=&b" (ccpu), "=&r" (old) 59 : "r" ((char *)c - (char *)&__pcpu[0]), "r" (inc) 60 : "cc", "memory"); 61 } 62 63 #else /* !AIM || !64bit */ 64 65 #define counter_enter() critical_enter() 66 #define counter_exit() critical_exit() 67 68 #define counter_u64_add_protected(c, inc) do { \ 69 CRITICAL_ASSERT(curthread); \ 70 *(uint64_t *)zpcpu_get(c) += (inc); \ 71 } while (0) 72 73 static inline void 74 counter_u64_add(counter_u64_t c, int64_t inc) 75 { 76 77 counter_enter(); 78 counter_u64_add_protected(c, inc); 79 counter_exit(); 80 } 81 82 #endif /* AIM 64bit */ 83 84 #endif /* ! __MACHINE_COUNTER_H__ */ 85