External m.d. interface points: To config, code should configure 'gt' with a struct gtbus_attach_args filled in. The code should have already set up the bus_space and bus_dma tags that are passed in. m.d. pci_chipset_tag_t should contain at least a copy of the gtpci_chipset_tag_t data structure. m.d. code must provide the following functions: pci_intr_map pci_intr_string pci_intr_establish, pci_intr_disestablish void *gtmpp_intr_establish(struct gt_softc *gt, int mpp_pin, int ipl, int (*handler)(void *), void *arg); Add an interrupt attached to Discovery MPP pin <mpp_pin> at the given ipl with the given handler. void gtmpp_intr_disestablish(struct gt_softc *gt, void *cookie); Remove an interrupt attached to Discovery MPP pin. int gtget_macaddr(struct gt_softc *gt, int function, char *enaddr); Get MAC for Discovery ethernet <function> void intr_enable(void); Enable all interrupts (disregarding spls) void intr_disable(void); Disable all interrupts (disregarding spls)