1/*
2 * Copyright (c) 2017-2021 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28#ifndef MACHINE_MONOTONIC_H
29#define MACHINE_MONOTONIC_H
30
31#if CONFIG_CPU_COUNTERS
32
33#if defined(__x86_64__)
34#include <x86_64/monotonic.h>
35#elif defined(__arm64__)
36#include <arm64/monotonic.h>
37#else
38#error unsupported architecture
39#endif
40
41#include <stdatomic.h>
42#include <stdbool.h>
43#include <stdint.h>
44
45struct mt_cpu {
46 uint64_t mtc_snaps[MT_CORE_NFIXED];
47 uint64_t mtc_counts[MT_CORE_NFIXED];
48 uint64_t mtc_counts_last[MT_CORE_NFIXED];
49 uint64_t mtc_npmis;
50 /*
51 * Whether this CPU should be using PMCs.
52 */
53 bool mtc_active;
54};
55
56struct mt_cpu *mt_cur_cpu(void);
57
58uint64_t mt_count_pmis(void);
59void mt_mtc_update_fixed_counts(struct mt_cpu *mtc, uint64_t *counts,
60 uint64_t *counts_since);
61uint64_t mt_mtc_update_count(struct mt_cpu *mtc, unsigned int ctr);
62uint64_t mt_core_snap(unsigned int ctr);
63void mt_core_set_snap(unsigned int ctr, uint64_t snap);
64void mt_mtc_set_snap(struct mt_cpu *mtc, unsigned int ctr, uint64_t snap);
65
66typedef void (*mt_pmi_fn)(bool user_mode, void *ctx);
67extern bool mt_microstackshots;
68extern unsigned int mt_microstackshot_ctr;
69extern mt_pmi_fn mt_microstackshot_pmi_handler;
70extern void *mt_microstackshot_ctx;
71extern uint64_t mt_core_reset_values[MT_CORE_NFIXED];
72int mt_microstackshot_start_arch(uint64_t period);
73
74#endif /* CONFIG_CPU_COUNTERS */
75
76#endif /* !defined(MACHINE_MONOTONIC_H) */
77