MCFUART_UIMR
writeb(pp->imr, port->membase + MCFUART_UIMR);
writeb(pp->imr, port->membase + MCFUART_UIMR);
writeb(pp->imr, port->membase + MCFUART_UIMR);
writeb(pp->imr, port->membase + MCFUART_UIMR);
writeb(pp->imr, port->membase + MCFUART_UIMR);
writeb(0, port->membase + MCFUART_UIMR);