#include <u.h>#include <libc.h>#include <tos.h> struct timeval {	long tv_sec;	long tv_usec;}; static uvlongnanosec(void){	static uvlong fasthz, xstart;	uvlong x, div; 	if(fasthz == ~0ULL)		return nsec() - xstart; 	if(fasthz == 0){		fasthz = _tos->cyclefreq;		if(fasthz == 0){			fasthz = ~0ULL;			xstart = nsec();			fprint(2, "cyclefreq not available, falling back to nsec()\n");			fprint(2, "you might want to disable aux/timesync\n");		}else{			cycles(&xstart);		}		return 0;	}	cycles(&x);	x -= xstart; 	/* this is ugly */	for(div = 1000000000ULL; x < 0x1999999999999999ULL && div > 1 ; div /= 10ULL, x *= 10ULL); 	return x / (fasthz / div);} intgettimeofday(struct timeval *tp, struct timezone *tzp){	long long t; 	USED(tzp);	t = nanosec();	tp->tv_sec = t / 1000000000ULL;	tp->tv_usec = (t / 1000ULL)%1000000ULL; 	return 0;}