[coreboot] how to assign irq to a device

Andrew Goodbody ajg4tadpole at gmail.com
Thu Oct 11 09:51:02 CEST 2012

On 10/10/12 12:11, WANG Siyuan wrote:
> hi,
> i am debugging a mainboard with an external pci network adapter.
> the adapter share irq with usb. it seems not correct, so i want to assign
> an irq for this adapter.
> how to do that?
> thank you.

1) PCI interrupts can be shared. It is OK and usual for this to happen.
2) Manually assigning interrupts is pointless, let the firmware or OS do 
it. It knows what is possible and will do the best that it can.
3) What is possible depends on the motherboard. It may be impossible for 
those devices to have different IRQs assigned.
4) This is a coreboot mailing list. Is the motherboard using coreboot? 
If so then please tell us the exact motherboard and where the coreboot 
code came from.


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