HelenOS sources

sun4u_add_fun     230 uspace/drv/platform/sun4u/sun4u.c 	if (!sun4u_add_fun(dev, "obio", "ebus/obio", &obio_data))
sun4u_add_fun     233 uspace/drv/platform/sun4u/sun4u.c 	return sun4u_add_fun(dev, "pci0", "intel_pci", &pci_data);
HelenOS homepage, sources at GitHub