// PE_Determine_Clock_Speeds is called by the via driver in IOKit
// It uses the numbers generated by pe_do_clock_test and reports
// the cleaned up values to the rest of the OS.
void PE_Determine_Clock_Speeds(unsigned int via_addr, int num_speeds,
unsigned long *speed_list)
{
boolean_t oldLevel;
unsigned long tmp_bus_speed, tmp_cpu_speed;
unsigned long long tmp;
oldLevel = ml_set_interrupts_enabled(FALSE);
pe_do_clock_test(via_addr, num_speeds, speed_list);
ml_set_interrupts_enabled(oldLevel);
tmp_bus_speed = bus_freq_num / bus_freq_den;
tmp = ((unsigned long long)bus_freq_num * cpu_pll) / (bus_freq_den * 2);
tmp_cpu_speed = (unsigned long)tmp;
// Report the bus clock rate as is.
gPEClockFrequencyInfo.bus_clock_rate_num = bus_freq_num;
gPEClockFrequencyInfo.bus_clock_rate_den = bus_freq_den;
// pll multipliers are in halfs so set the denominator to 2.
gPEClockFrequencyInfo.bus_to_cpu_rate_num = cpu_pll;
gPEClockFrequencyInfo.bus_to_cpu_rate_den = 2;
// The decrementer rate is one fourth the bus rate.
gPEClockFrequencyInfo.bus_to_dec_rate_num = 1;
gPEClockFrequencyInfo.bus_to_dec_rate_den = 4;
// Assume that the timebase frequency is derived from the bus clock.
gPEClockFrequencyInfo.timebase_frequency_num = bus_freq_num;
gPEClockFrequencyInfo.timebase_frequency_den = bus_freq_den * 4;
// Set the truncated numbers in gPEClockFrequencyInfo.
gPEClockFrequencyInfo.bus_clock_rate_hz = tmp_bus_speed;
gPEClockFrequencyInfo.cpu_clock_rate_hz = tmp_cpu_speed;
gPEClockFrequencyInfo.dec_clock_rate_hz = tmp_bus_speed / 4;
gPEClockFrequencyInfo.timebase_frequency_hz = tmp_bus_speed / 4;
gPEClockFrequencyInfo.bus_frequency_hz = tmp_bus_speed;
gPEClockFrequencyInfo.bus_frequency_min_hz = tmp_bus_speed;
gPEClockFrequencyInfo.bus_frequency_max_hz = tmp_bus_speed;
gPEClockFrequencyInfo.cpu_frequency_hz = tmp_cpu_speed;
gPEClockFrequencyInfo.cpu_frequency_min_hz = tmp_cpu_speed;
gPEClockFrequencyInfo.cpu_frequency_max_hz = tmp_cpu_speed;
PE_call_timebase_callback();
}
void PE_register_timebase_callback(timebase_callback_func callback)
{
gTimebaseCallback = callback;
PE_call_timebase_callback();
}
