1 /* $NetBSD: cpu_counter.h,v 1.7 2020/06/15 09:09:23 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bill Sommerfeld. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _X86_CPU_COUNTER_H_ 33 #define _X86_CPU_COUNTER_H_ 34 35 #ifdef _KERNEL 36 37 #include <sys/lwp.h> 38 39 extern uint64_t cpu_frequency(struct cpu_info *); 40 extern int cpu_hascounter(void); 41 extern uint64_t (*cpu_counter)(void); 42 extern uint32_t (*cpu_counter32)(void); 43 44 extern uint64_t cpu_counter_cpuid(void); 45 extern uint64_t cpu_counter_lfence(void); 46 extern uint64_t cpu_counter_mfence(void); 47 extern uint32_t cpu_counter32_cpuid(void); 48 extern uint32_t cpu_counter32_lfence(void); 49 extern uint32_t cpu_counter32_mfence(void); 50 51 #endif /* _KERNEL */ 52 53 #endif /* !_X86_CPU_COUNTER_H_ */ 54