IPL_COMM 185 bsp/drv/dev/serial/ns16550.c sp->irq = irq_attach(COM_IRQ, IPL_COMM, 0, ns16550_isr, IPL_COMM 214 bsp/drv/dev/serial/pl011.c sp->irq = irq_attach(UART_IRQ, IPL_COMM, 0, pl011_isr, IST_NONE, sp);