Re: hw/clock: What clock rate for virt machines?

[Philippe Mathieu-Daudé]

+PPC folks

On 9/2/20 7:03 PM, Philippe Mathieu-Daudé wrote:
> On 9/2/20 6:49 PM, Peter Maydell wrote:
[...]
>> Incidentally the serial.c API seems to be slightly confused
>> about the difference between setting the baudbase as a value
>> in bps (ie the traditional 9600, 115200, etc values) or a
>> frequency (where 115200 bps corresponds to a 1.8432MHz clock,
>> apparently). Luckily nobody uses the serial_set_frequency()
>> function :-)
> 
> Yes, it is a mess, I'm trying to not give up cleaning it.
> 
> Note, some boards correctly set the frequency:
> 
> musicpal, omap1 based, kzm, pxa2xx, boston.
> 
> lasi / jazz use an unlikely 8MHz clock.
> 
> For ppc405 I'm not sure this is an odd case:
>   99MHz / 248 = 399193.54838709677419354838

Or 12.375MHz / 31

But it is not a common xtal freq:

https://en.wikipedia.org/wiki/Crystal_oscillator_frequencies

> 
> Thanks!
> 
>>
>> thanks
>> -- PMM
>>
>