Trimming the default /boot/device.hints
John Baldwin
jhb at freebsd.org
Fri Feb 6 08:43:27 PST 2009
On Friday 06 February 2009 11:25:23 am M. Warner Losh wrote:
> In message: <200902061106.41235.jhb at freebsd.org>
> John Baldwin <jhb at freebsd.org> writes:
> : 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.
>
> sio could be loaded as a driver, and still be the console driver. But
> it had to be loaded from /boot/loader.
Are you sure? The console stuff is initialized (cninit()) well before any
SYSINIT's are run.
--
John Baldwin
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