1 #ifndef _BITS_PROFILE_H
2 #define _BITS_PROFILE_H
3 
4 /** @file
5  *
6  * Profiling
7  *
8  */
9 
10 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
11 
12 #include <stdint.h>
13 
14 /**
15  * Get profiling timestamp
16  *
17  * @ret timestamp	Timestamp
18  */
19 static inline __attribute__ (( always_inline )) uint64_t
profile_timestamp(void)20 profile_timestamp ( void ) {
21 	uint64_t tsc;
22 
23 	/* Read timestamp counter */
24 	__asm__ __volatile__ ( "rdtsc" : "=A" ( tsc ) );
25 	return tsc;
26 }
27 
28 #endif /* _BITS_PROFILE_H */
29