1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_TSC_H
3#define __PERF_TSC_H
4
5#include <linux/types.h>
6
7#include "event.h"
8
9struct perf_tsc_conversion {
10	u16 time_shift;
11	u32 time_mult;
12	u64 time_zero;
13	u64 time_cycles;
14	u64 time_mask;
15
16	bool cap_user_time_zero;
17	bool cap_user_time_short;
18};
19
20struct perf_event_mmap_page;
21
22int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
23			     struct perf_tsc_conversion *tc);
24
25u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);
26u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);
27u64 rdtsc(void);
28double arch_get_tsc_freq(void);
29
30size_t perf_event__fprintf_time_conv(union perf_event *event, FILE *fp);
31
32#endif // __PERF_TSC_H
33