From owner-freebsd-isdn Sat Feb 28 16:47:04 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA12833 for freebsd-isdn-outgoing; Sat, 28 Feb 1998 16:47:04 -0800 (PST) (envelope-from owner-freebsd-isdn@FreeBSD.ORG) Received: from whistle.com (s205m131.whistle.com [207.76.205.131]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA12813 for ; Sat, 28 Feb 1998 16:46:59 -0800 (PST) (envelope-from archie@whistle.com) Received: (from smap@localhost) by whistle.com (8.7.5/8.6.12) id QAA05260; Sat, 28 Feb 1998 16:46:29 -0800 (PST) Received: from bubba.whistle.com(207.76.205.7) by whistle.com via smap (V1.3) id sma005258; Sat Feb 28 16:46:17 1998 Received: (from archie@localhost) by bubba.whistle.com (8.8.7/8.6.12) id QAA09966; Sat, 28 Feb 1998 16:46:16 -0800 (PST) From: Archie Cobbs Message-Id: <199803010046.QAA09966@bubba.whistle.com> Subject: Re: AVM A1 Setup bug on NetBSD? In-Reply-To: <199803010018.BAA00211@rvc1.informatik.ba-stuttgart.de> from Wolfgang Helbig at "Mar 1, 98 01:18:49 am" To: helbig@Informatik.BA-Stuttgart.DE (Wolfgang Helbig) Date: Sat, 28 Feb 1998 16:46:11 -0800 (PST) Cc: freebsd-isdn@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-isdn@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Wolfgang Helbig writes: > > Sounds like a case of the chip generating a level-sensitive interrupt > > and the board needing an edge. If a new interrupt becomes pending > ^^^^^ and/or the PIC ? > > while you're in your interrupt routine, but before you've cleared > > the old interrupt condition, you must generate a new edge by masking > > and then unmasking all interrupts. > > > > Just a guess.. > > In fact the Siemens chips (ISAC, HSCX) both generate level-sensitive > interrupts and the PIC on a PC is programmed to be edge-sensitive. > That's why we have this MASK/UNMASK dance in the ISR in the first place. > We don't know so much about the board. > > But on the SMP system not even *one* interrupt is delivered, so the > very first edge seems to be lost. > On the same hardware this edge is not lost if a uniprocessor kernel > is running. Yes, I meant "PIC" instead of "board"... it definitely sounds like a different problem from what I was thinking. -Archie ___________________________________________________________________________ Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message