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 	uint32_t eax;
22 	uint32_t edx;
23 
24 	/* Read timestamp counter */
25 	__asm__ __volatile__ ( "rdtsc" : "=a" ( eax ), "=d" ( edx ) );
26 	return ( ( ( ( uint64_t ) edx ) << 32 ) | eax );
27 }
28 
29 #endif /* _BITS_PROFILE_H */
30