Messages in this thread Patch in this message | | | Date | Tue, 02 Nov 2004 09:15:25 -0500 | From | Jim Nelson <> | Subject | Re: PCI & IRQ problems on TI Extensa 600CD |
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David Jez wrote: > Hi Jim, > > >>Need to compile a new kernel for this thing w/o tridentfb - doesn't work >>right on my system for some reason. >> >><dmesg - haven't compiled a 2.6.9 for it yet> >> >>PCI: PCI BIOS revision 2.10 entry at 0xfd930, last bus=6 >>PCI: Using configuration type 1 >>Linux Kernel Card Services >> options: [pci] [cardbus] [pm] >>PCI: Probing PCI hardware >>PCI: Probing PCI hardware (bus 00) > > IRQ router is missing. > > >>PCI: No IRQ known for interrupt pin A of device 0000:00:02.0. Please try >>using pci=biosirq. >>PCI: No IRQ known for interrupt pin B of device 0000:00:02.1. Please try >>using pci=biosirq. >> >>00:00.0 Class 0600: 8086:1235 (rev 02) >>00:01.0 Class 0601: 8086:122e (rev 02) >>00:02.0 Class 0607: 104c:ac12 (rev 04) >>00:02.1 Class 0607: 104c:ac12 (rev 04) >>00:03.0 Class 0300: 1023:9660 (rev d3) >>00:05.0 Class 0400: 1014:0057 >> >>No PCI interrupt routing table was found. >> >>Interrupt router at 00:01.0: Intel 82371FB PIIX PCI-to-ISA bridge >> PIRQ1 (link 0x60): irq 11 >> PIRQ2 (link 0x61): irq 11 >> PIRQ3 (link 0x62): unrouted >> PIRQ4 (link 0x63): unrouted >> Serial IRQ: [disabled] [quiet] [frame=17] [pulse=4] >> Level mask: 0x0800 [11] > > It looks that you have same problem and kernel doesn't find IRQ > router. So try attached patch (for 2.6.9 and added your bridge) if it helps. > I think that it may help (look at dump_pirq results). > You can try turn on DEBUG (in file arch/i386/pci/pci.h) and see debug > messages on screen. > > Dave > >
That patch comes too late in the PCI init sequence for my machine. pirq_find_router() (where your patch goes) depends on pirq_table being set up by pirq_find_routing_table(). When I put in the debug statement in the attached patch, I got the "PCI: No Interrupt Routing Table found" message. Since pirq_table wasn't set up, pirq_find_router() is never called. Let me look at this some more (got vacation this week, so I can finally devote some time to this.)
Jim --- linux-2.6.9/arch/i386/pci/irq.c~~ 2004-11-02 07:13:15.562669774 -0500 +++ linux-2.6.9/arch/i386/pci/irq.c 2004-11-02 09:01:05.911581344 -0500 @@ -80,6 +80,7 @@ return rt; } } + DBG("PCI: No Interrupt Routing Table found\n"); return NULL; } | |