-extern irqreturn_t bvme6000_process_int (int level, struct pt_regs *regs);
-extern void bvme6000_init_IRQ (void);
-extern void bvme6000_free_irq (unsigned int, void *);
-extern int show_bvme6000_interrupts(struct seq_file *, void *);
-extern void bvme6000_enable_irq (unsigned int);
-extern void bvme6000_disable_irq (unsigned int);