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 cycles;
22 
23 	/* Read cycle counter */
24 	__asm__ __volatile__ ( "mrs %0, CNTVCT_EL0\n\t" : "=r" ( cycles ) );
25 	return cycles;
26 }
27 
28 #endif /* _BITS_PROFILE_H */
29