1/* $NetBSD: cpu_counter.h,v 1.2 2021/02/22 09:29:38 ryo Exp $ */ 2 3/*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 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 _AARCH64_CPU_COUNTER_H_ 33#define _AARCH64_CPU_COUNTER_H_ 34 35/* 36 * AArch64 specific support for CPU counter. 37 */ 38 39#ifdef _KERNEL 40 41#ifdef __aarch64__ 42 43#include <sys/cpu.h> 44#include <aarch64/armreg.h> 45 46#define cpu_hascounter() (curcpu()->ci_data.cpu_cc_freq != 0) 47 48static __inline uint64_t 49cpu_counter(void) 50{ 51 return reg_pmccntr_el0_read(); 52} 53 54static __inline uint32_t 55cpu_counter32(void) 56{ 57 return reg_pmccntr_el0_read(); 58} 59 60static __inline uint64_t 61cpu_frequency(struct cpu_info *ci) 62{ 63 return ci->ci_data.cpu_cc_freq; 64} 65 66#endif /* _KERNEL */ 67 68#elif defined(__arm__) 69 70#include <arm/cpu_counter.h> 71 72#endif 73 74#endif /* _AARCH64_CPU_COUNTER_H_ */ 75