Trimming the default /boot/device.hints

John Baldwin jhb at freebsd.org
Fri Feb 6 08:07:07 PST 2009


On Friday 06 February 2009 10:22:35 am Andriy Gapon wrote:
> on 06/02/2009 16:37 John Baldwin said the following:
> > 
> > Yes, it only needs the hint for it to be a console device.
> > 
> 
> I am slightly confused as to how that hint works then, it's not like a
> standard isa hint it seems.
> Can it somehow be built-in (into the code)?

It works "normally" during the new-bus attach, but the low-level console code 
probably checks for it early on as well.  The serial console code works that 
way.  The uart(4) and sio(4) drivers explicitly look for uart/sio hints to 
find possible console devices.  This is separate from when the ISA bus adds 
uart/sio devices from the hints later on.

-- 
John Baldwin


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