Stuff

void pe_identify_machine(__unused boot_args *args)
{
  // Clear the gPEClockFrequencyInfo struct
  bzero((void *)&gPEClockFrequencyInfo, sizeof(clock_frequency_info_t));
  
  // Start with default values.
  gPEClockFrequencyInfo.timebase_frequency_hz = 1000000000;
  gPEClockFrequencyInfo.bus_frequency_hz      =  100000000;
  gPEClockFrequencyInfo.cpu_frequency_hz      =  300000000;
  
  gPEClockFrequencyInfo.bus_frequency_min_hz = gPEClockFrequencyInfo.bus_frequency_hz;
  gPEClockFrequencyInfo.bus_frequency_max_hz = gPEClockFrequencyInfo.bus_frequency_hz;
  gPEClockFrequencyInfo.cpu_frequency_min_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
  gPEClockFrequencyInfo.cpu_frequency_max_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
  
  gPEClockFrequencyInfo.dec_clock_rate_hz = gPEClockFrequencyInfo.timebase_frequency_hz;
  gPEClockFrequencyInfo.bus_clock_rate_hz = gPEClockFrequencyInfo.bus_frequency_hz;
  gPEClockFrequencyInfo.cpu_clock_rate_hz = gPEClockFrequencyInfo.cpu_frequency_hz;

int
rtclock_init(void)
{
	uint64_t	cycles;

	assert(!ml_get_interrupts_enabled());

	if (cpu_number() == master_cpu) {

		assert(tscFreq);
		rtc_set_timescale(tscFreq);

		/*
		 * Adjust and set the exported cpu speed.
		 */
		cycles = rtc_export_speed(tscFreq);

		/*
		 * Set min/max to actual.
		 * ACPI may update these later if speed-stepping is detected.
		 */
		gPEClockFrequencyInfo.cpu_frequency_min_hz = cycles;
		gPEClockFrequencyInfo.cpu_frequency_max_hz = cycles;

SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency_max, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_max_hz, "");