Date: Tue, 18 Jan 2005 13:39:38 -0500 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-smp@FreeBSD.org Cc: Peter Trifonov <pvtrifonov@mail.ru> Subject: Re: Lost interrupts on SMP systems Message-ID: <200501181339.38078.jhb@FreeBSD.org> In-Reply-To: <E1Cqxrp-00082W-00.pvtrifonov-mail-ru@mx1.mail.ru> References: <E1Cqxrp-00082W-00.pvtrifonov-mail-ru@mx1.mail.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tuesday 18 January 2005 01:18 pm, Peter Trifonov wrote:
> Hello John,
>
> > > Here is what it says:
> > > # ./inb 0x4d0
> > > inb(0x4d0) = 0x0 = 0d = '^@'
> > > # ./inb 0x4d1
> > > inb(0x4d1) = 0xe = 14d = '^N'
> >
> > Ok, this is good, it means you do have an ELCR. Let me give you a
> > quick patch to try. This will be relative to your existing mptable.c
> > file since i've committed the first mptable patch to current already.
>
> Thanks a lot!!!
> Now the box works perfectly!
Excellent. Can you try this additional change and see if it still works or if
it breaks things? In past experience, ISA interrupts haven't ever been
programmed as level/hi, but always either edge/hi or level/lo, so I want to
try using lo polarity based on the ELCR as well. (I'm trying to avoid
possibly breaking other boxes in the field.)
---- //depot/user/jhb/acpipci/i386/i386/mptable.c#79
+++ /home/john/work/p4/acpipci/i386/i386/mptable.c
@@ -560,6 +560,13 @@
KASSERT(src_bus <= mptable_maxbusid, ("bus id %d too large", src_bus));
switch (busses[src_bus].bus_type) {
case ISA:
+#ifndef PC98
+ if (elcr_found &&
+ elcr_read_trigger(src_bus_irq) == INTR_TRIGGER_LEVEL)
+ return (INTR_POLARITY_LOW);
+ else
+#endif
+ return (INTR_POLARITY_HIGH);
case EISA:
return (INTR_POLARITY_HIGH);
case PCI:
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200501181339.38078.jhb>