+extern struct pci_controller tx4938_pci_controller[];
+extern struct tx4938_pcic_reg *get_tx4938_pcicptr(int ch);
+
+static struct tx4938_pcic_reg *pci_bus_to_pcicptr(struct pci_bus *bus)
+{
+ struct pci_controller *channel = bus->sysdata;
+ return get_tx4938_pcicptr(channel - &tx4938_pci_controller[0]);
+}
+