Date: Mon, 22 Jan 2001 21:00:41 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Andy Farkas <andyf@speednet.com.au> Cc: bauerp <bauerp@bigfoot.com>, freebsd-bugs@FreeBSD.ORG Subject: Re: serial port problems Message-ID: <Pine.BSF.4.21.0101222056080.28114-100000@besplex.bde.org> In-Reply-To: <Pine.BSF.4.21.0101201115420.25091-100000@backup.af.speednet.com.au>
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On Sat, 20 Jan 2001, Andy Farkas wrote: > On Wed, 10 Jan 2001, Bruce Evans wrote: > > The driver already does an unreasonable amount of checking at probe > > time that the ports work. It even checks that interrupts work. > > Non-working interrupts caused the probe to fail in FreeBSD-2, but now > > certain types of broken interrupts only result in a boot message like > > "configured irq 4 not in bitmap of probed irqs 0". I don't know how > > this particular failure would cause a lockup. > Well, I think something is wrong with the probe, 'cause this machine does > not have any serial ports (it used to) yet says: > > ... > FreeBSD 4.1.1-STABLE #0: Sat Oct 14 19:20:47 EST 2000 > ... > sio0: configured irq 4 not in bitmap of probed irqs 0 > sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 > sio0: type 8250 > ... > > The probe did not pick up the fact that there is no serial port. > > This is an old dual P90 MB with no onboard coms or lpt. I don't see how it can get that far without there being something very much like an 8250 at port 0x3f8, unless the undocumented no-probe flag (0x40000) somehow gets set. The flag is only supposed to be set internally for pccards. It's interesting that only an 8250 is found. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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