Date: Mon, 31 Jul 2006 15:40:16 GMT From: Jo Rhett <jrhett@svcolo.com> To: freebsd-i386@FreeBSD.org Subject: Re: i386/100831: sio ignores BIOS information about serial ports - bounty offered Message-ID: <200607311540.k6VFeGWs080984@freefall.freebsd.org>
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The following reply was made to PR i386/100831; it has been noted by GNATS. From: Jo Rhett <jrhett@svcolo.com> To: Bruce Evans <bde@zeta.org.au> Cc: freebsd-gnats-submit@FreeBSD.org, freebsd-i386@FreeBSD.org Subject: Re: i386/100831: sio ignores BIOS information about serial ports - bounty offered Date: Mon, 31 Jul 2006 08:30:53 -0700 On Mon, Jul 31, 2006 at 07:55:42PM +1000, Bruce Evans wrote: > On Tue, 25 Jul 2006, Jo Rhett wrote: > >>Description: > >For our motherboard, "Serial A" in hardwired on the board with a 9-pin > >connector. "Serial B" is a normal serial connector that can be wired > >anywhere. Rackable uses this connector to connect to their out-of-band > >management interface. > > > >So in the BIOS configuration, we assign COM1 = "Serial B" and COM2 = > >"Serial A". This works perfectly for the POST console redirection and > >FreeBSD boot process. > I think you just need to swap the ports in /boot/device.hints? device.hints contains what you expect. 0x3f8 should be sio0, but its not. This is apparently ignored. > initialization uses the apparently-higher-level resource access functions > it is actually just using the hints, so the hints had better be correct > -- they are more than hints. Sure, but they aren't working. That's the nature of this beast/bug. > I don't know exactly what happens with ACPI. Ideally, ACPI should set > the resource values to match the BIOS, and this might involve ignoring > most hints and this changing the values from their defaults, but for > consoles any changes in the values would be wrong and might result in > the high-level console (/dev/console) being attached to a different > device than the low-level console (the one used for kernel printfs). Exactly what I'm worried about. -- Jo Rhett senior geek SVcolo : Silicon Valley Colocation
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