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#ifndef _BITS_PROFILE_H
#define _BITS_PROFILE_H
/** @file
*
* Profiling
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
extern uint32_t pmccntr_status;
/**
* Get profiling timestamp
*
* @ret timestamp Timestamp
*/
static inline __attribute__ (( always_inline )) unsigned long
profile_timestamp ( void ) {
uint32_t cycles;
/* Read cycle counter */
__asm__ __volatile__ ( /* Check PMCCNTR status */
"tst %0, %0\n\t"
/* Check availability if not yet known */
"it mi\n\t"
"blxmi pmccntr_check\n\t"
/* Read PMCCNTR if available */
"it ne\n\t"
"mrcne p15, 0, %0, c9, c13, 0\n\t"
"\n1:\n\t"
: "=r" ( cycles )
: "0" ( pmccntr_status )
: "cc", "lr" );
return cycles;
}
#endif /* _BITS_PROFILE_H */
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