1 #ifndef TOOLS_PERF_ARCH_X86_UTIL_TSC_H__
2 #define TOOLS_PERF_ARCH_X86_UTIL_TSC_H__
3 
4 #include "../../util/types.h"
5 
6 struct perf_tsc_conversion {
7 	u16 time_shift;
8 	u32 time_mult;
9 	u64 time_zero;
10 };
11 
12 struct perf_event_mmap_page;
13 
14 int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
15 			     struct perf_tsc_conversion *tc);
16 
17 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);
18 u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);
19 
20 #endif /* TOOLS_PERF_ARCH_X86_UTIL_TSC_H__ */
21