[coreboot] [PATCH] artecgroup/dbe62: Route ethernet adapter IRQ correctly and reduce interrupt contention problems by using different IRQs for all the interrupt lines

Peter Stuge peter at stuge.se
Sun May 4 03:17:57 CEST 2008

On Sun, May 04, 2008 at 03:11:02AM +0200, Peter Stuge wrote:
> USB is on the GLIU in 5536 and not on any external PCI bus.
> But it still appears to be a PCI device, and it needs an interrupt.

32663C_lx_gx_pciconfig.pdf page 46-49 seems to suggest that USB is
always on INTD# IRQ11. This could be hardwired in LX/5536; GL packets
from USB will always trigger IRQ11. Or worse they will always trigger
PCI_INTD# meaning a well-designed board with 4 PCI slots, or a badly
designed board with less slots will always need to share somewhere.


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