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

[Ravi Shankar]

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?)

NOTE: Other devices ( Intel controller (em driver)) are working fine only this BCM5703 is having issues with IOAPIC

Thanks,
Ravi