uint64_t	prfsts;
	
	prfsts = rdmsr64(IA32_PERF_STS);
	tscGranularity = (uint32_t)(prfsts >> BusRatioShift) & BusRatioMask;

	
    tscFCvtt2n = busFCvtt2n / (uint64_t)tscGranularity;
    tscFreq = ((1 * Giga)  << 32) / tscFCvtt2n;
    tscFCvtn2t = 0xFFFFFFFFFFFFFFFFULL / tscFCvtt2n;

    kprintf(" TSC: Frequency = %6d.%04dMHz, "
	    "cvtt2n = %08X.%08X, cvtn2t = %08X.%08X, gran = %d\n",
	    (uint32_t)(tscFreq / Mega),
	    (uint32_t)(tscFreq % Mega), 
	    (uint32_t)(tscFCvtt2n >> 32), (uint32_t)tscFCvtt2n,
	    (uint32_t)(tscFCvtn2t >> 32), (uint32_t)tscFCvtn2t,
	    tscGranularity);

    /*
     * Calculate conversion from BUS to TSC
     */
    bus2tsc = tmrCvt(busFCvtt2n, tscFCvtn2t);