Date: Mon, 26 Jun 2000 15:31:32 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Nick Hibma <n_hibma@calcaphon.com> Cc: Mike Smith <msmith@FreeBSD.ORG>, FreeBSD CURRENT Mailing List <current@FreeBSD.ORG> Subject: Re: irunning, width in bits. Message-ID: <200006261931.PAA70567@khavrinen.lcs.mit.edu> In-Reply-To: <Pine.BSF.4.20.0006261125350.11136-100000@localhost> References: <200006260823.BAA00624@mass.osd.bsdi.com> <Pine.BSF.4.20.0006261125350.11136-100000@localhost>
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<<On Mon, 26 Jun 2000 11:29:39 +0100 (BST), Nick Hibma <n_hibma@calcaphon.com> said: > I guess that the perfect solution is to be able to hardwire the PCI irqs > in some way once FreeBSD is doing the PnP resource allocation. On typical non-SMP motherboards, the PCI IRQs are hard-wired on the motherboard. That is to say, INTA of slot 13 is wire-OR'd with INTB of slot 14, is wire-OR'd with INTC of slot 15, is wire-OR'd with INTD of slot 16, and oh, yeah, is also wire-OR'd with INTA of every on-motherboard device. SMP motherboards tend to be significantly better in this regard. The PCI BIOS includes a function which gives you the map of how interrupts are wired together. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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