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