extern struct serial_device eserial1_device;
extern struct serial_device eserial2_device;
+extern struct serial_device eserial3_device;
+extern struct serial_device eserial4_device;
+extern struct serial_device eserial5_device;
+extern struct serial_device eserial6_device;
extern void serial_register(struct serial_device *);
extern void serial_initialize(void);