Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262327AbVCPKQV (ORCPT ); Wed, 16 Mar 2005 05:16:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262324AbVCPKQV (ORCPT ); Wed, 16 Mar 2005 05:16:21 -0500 Received: from smtp10.wanadoo.fr ([193.252.22.21]:43664 "EHLO smtp10.wanadoo.fr") by vger.kernel.org with ESMTP id S262331AbVCPKPy convert rfc822-to-8bit (ORCPT ); Wed, 16 Mar 2005 05:15:54 -0500 X-ME-UUID: 20050316101551257.3EC4C24000A2@mwinf1002.wanadoo.fr Subject: Re: Documentation/i386/IO-APIC.txt (Re: 2.6.11 USB broken on VIA computer (not just ACPI)) From: Xavier Bestel To: Andrew Morton , Ingo Molnar Cc: "Robert W. Fuller" , linux-kernel@vger.kernel.org In-Reply-To: <1110967201.20838.221.camel@gonzales> References: <4237A5C1.5030709@sbcglobal.net> <20050315203914.223771b2.akpm@osdl.org> <4237C40C.6090903@sbcglobal.net> <20050315213110.75ad9fd5.akpm@osdl.org> <4237C61A.6040501@sbcglobal.net> <20050315215447.7975a0ff.akpm@osdl.org> <1110967201.20838.221.camel@gonzales> Content-Type: text/plain; charset=UTF-8 Date: Wed, 16 Mar 2005 11:08:12 +0100 Message-Id: <1110967692.20838.224.camel@gonzales> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2308 Lines: 52 Le mercredi 16 mars 2005 à 11:00 +0100, Xavier Bestel a écrit : > Le mardi 15 mars 2005 à 21:54 -0800, Andrew Morton a écrit : > > You may be able to set the thing up by hand with the help of > > Documentation/i386/IO-APIC.txt. > > There's something I don't get in this document's ascii-art: > > 8<------------------------------------------------------------------ > ,-. ,-. ,-. ,-. ,-. > PIRQ4 ----| |-. ,-| |-. ,-| |-. ,-| |--------| | > |S| \ / |S| \ / |S| \ / |S| |S| > PIRQ3 ----|l|-. `/---|l|-. `/---|l|-. `/---|l|--------|l| > |o| \/ |o| \/ |o| \/ |o| |o| > PIRQ2 ----|t|-./`----|t|-./`----|t|-./`----|t|--------|t| > |1| /\ |2| /\ |3| /\ |4| |5| > PIRQ1 ----| |- `----| |- `----| |- `----| |--------| | > `-' `-' `-' `-' `-' > > every PCI card emits a PCI IRQ, which can be INTA,INTB,INTC,INTD: > > ,-. > INTD--| | > |S| > INTC--|l| > |o| > INTB--|t| > |x| > INTA--| | > `-' > > These INTA-D PCI IRQs are always 'local to the card', their real meaning > depends on which slot they are in. If you look at the daisy chaining diagram, > a card in slot4, issuing INTA IRQ, it will end up as a signal on PIRQ2 of > the PCI chipset. [...] > 8<------------------------------------------------------------------ > > If I follow the wire from Slot4's INTA, I'm ending on PIRQ4 whereas the > doc says IRQ2. Do I need glasses, or a new fixed-font ? Sorry for replying to myself, in fact it seems like somebody reversed the order of PIRQ[1-4] and INT[A-D] in the ascii-art, but didn't touch the rest of the text at all. There are several more references to a "reversed order". Xav - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/