src/mainboard/amd/rumba/devicetree.cb

chip northbridge/amd/gx2
	device lapic_cluster 0 on
		chip cpu/amd/geode_gx2
			device lapic 0 on end
		end
	end
  	device pci_domain 0 on
    		device pci 1.0 on end
		device pci 1.1 on end
      		chip southbridge/amd/cs5536
			register "lpc_serirq_enable" = "0x80"  # enabled with default timing
        		device pci d.0 on end	# Realtek 8139 LAN
        		device pci f.0 on end	# ISA Bridge
        		device pci f.2 on end	# IDE Controller
        		device pci f.3 on end 	# Audio
        		device pci f.4 on end	# OHCI
			device pci f.5 on end	# EHCI
      		end
    	end
end