Regarding enabling IOAPIC on Intel Dual core processor based boards having Broadcom controller

[John Baldwin]

On Tuesday 01 December 2009 5:00:06 pm Ravi Shankar wrote:
> Hi,
> 
>  We are using Freebsd6.2 bases OS on our LV 5200 Series Intel Dual Core Xeon
> bases processor(Wolfdale-DP-ULV). In the carrier board hosting the processor
> we have BCM5703 controller.
> Currently we are using only one core in 32 bit mode and planning to use dual
> core where we need to enable IOAPIC. When IOAPIC is not enabled I see the
> bcm/bge driver is attached to IRQ10 and everything works fine, but when I
> enable IOAPIC I still see the boot msgs show that bge is attached to irq10
> but the Broadcom controller does not come up. I found interrupt storm on
> irq17 ( remember without IOAPIC enable there are not IRQ assignments beyond
> IRQ16),looks like the controller is interrupting on 17 while driver waits on
> 10.
> 
>   When I stop and loader and assign it manually using config command "set
> hw.pci8.9.INTA.irq=”17”" , everything works fine. Would be great if some one
> can throw some light on this IRQ mapping when IOAPIC is enabled and possible
> fix ( Software or BIOS?)

This sounds like a BIOS issue.  Are you using ACPI?  If so, can you provide 
the output of 'acpidump -t' along with a dmesg?  If you aren't using ACPI, can 
you provide the output of 'mptable' along with a dmesg?

-- 
John Baldwin