Date: Mon, 31 Jan 2005 17:38:04 -0500 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-amd64@FreeBSD.org Subject: Re: nForce3 (Compaq R3000) timer fix Message-ID: <200501311738.04377.jhb@FreeBSD.org> In-Reply-To: <200501261149.11530.jkim@niksun.com> References: <200501261149.11530.jkim@niksun.com>
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On Wednesday 26 January 2005 11:49 am, Jung-uk Kim wrote: > This is (hopefully) the last patch of the series, which fixes infamous > '8254 timer not connected to IO-APIC' problem for nForce2+. Linux > people had a hack here: > > http://lkml.org/lkml/2003/12/21/7 > > (Note: 2.6.10 has more refined version.) > > The attached patch requires the previous 'skip_timer_override' hack > posted here: > > http://docs.freebsd.org/cgi/mid.cgi?200501192214.27401.jkim > > After the patch, you need to set 'hw.apic.skip_set_extint=1' from > loader or loader.conf. Be careful with spelling; this is 'apic', not > 'acpi' this time. ;-) > > With verbose boot logging, we should see: > > ioapic0: intpin 0 -> ISA IRQ 0 (edge, high) > > instead of: > > ioapic0: Routing external 8259A's -> intpin 0 > ioapic0: intpin 0 -> ExtINT (edge, high) > > I was able to run this laptop overnight without 'device atpic'. ;-) I > think somebody (jhb and peter, I guess) should double check if this > is okay. I tried many combinations including 'options SMP' and all > seemed to be fine so far. > > Finally I can run this laptop at full speed (2 GHz) under heavy load > with 'acpi_ppc' driver! > > http://www.spa.is.uec.ac.jp/~nfukuda/software/ Ok,. this answers my earlier question, pin 0 is really ISA IRQ 0 and not ExtINT. Unfortunately, there's no good way to know this from MADT or MPTable except using some sort of BIOS blacklist. I want to tinker with this slightly so we can require just one hint in the MADT code to handle this though. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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