Date: Fri, 6 Feb 2009 11:55:48 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-arch@freebsd.org Cc: Andriy Gapon <avg@icyb.net.ua> Subject: Re: Trimming the default /boot/device.hints Message-ID: <200902061155.48705.jhb@freebsd.org> In-Reply-To: <200902061143.10088.jhb@freebsd.org> References: <200901260947.32870.jhb@freebsd.org> <498C55BB.3030606@icyb.net.ua> <200902061143.10088.jhb@freebsd.org>
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On Friday 06 February 2009 11:43:09 am John Baldwin wrote:
> 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)?
>
> Specifically, look at sc_cnprobe() in sys/dev/syscons/syscons.c. It calls a
> sc_cons_get_priority() routine that on x86 maps lives in
> sys/isa/syscons_isa.c. This checks for a syscons hint. Changing it to
> always assume a unit 0 would probably allow this to work.
Something like this (untested):
--- //depot/user/jhb/acpipci/isa/syscons_isa.c
+++ /home/jhb/work/p4/acpipci/isa/syscons_isa.c
@@ -238,8 +238,10 @@
*flags = f;
}
}
- if (*unit < 0)
- return CN_DEAD;
+ if (*unit < 0) {
+ *unit = 0;
+ *flags = 0;
+ }
#if 0
return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
#endif
--
John Baldwin
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