Date: Thu, 24 Sep 1998 13:54:23 -0700 From: Mike Smith <mike@smith.net.au> To: "Justin T. Gibbs" <gibbs@plutotech.com> Cc: Mike Smith <mike@smith.net.au>, bde@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: options DPT_LOST_IRQ Message-ID: <199809242054.NAA00826@dingo.cdrom.com> In-Reply-To: Your message of "Thu, 24 Sep 1998 14:37:47 MDT." <199809242044.OAA08682@pluto.plutotech.com>
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> >The problem seems to be that the DPT "stops asserting" the interrupt, > >going by what Eivind said. I presume we're talking about a PCI device > >here, right? > > If it stops asserting the interrupt, we should get a stray interrupt > reported when we go to clear the pending mask. Is this what is happening? I don't actually think we should; the stray interrupt feature occurs when an edge is seen on an interrupt line, but when the latch fires (one or two clocks later?) there is nothing there to latch. This is the way the 8259 works; PCI and APIC interrupt behaviour is still largely a mystery to me. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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