acpi_md_intr_establish
void * acpi_md_intr_establish(uint32_t, int, int, int (*)(void *),
void * acpi_md_intr_establish(uint32_t, int, int, int (*)(void *),
ih = acpi_md_intr_establish(InterruptNumber, IPL_TTY, IST_LEVEL,
void * acpi_md_intr_establish(uint32_t, int, int, int (*)(void *),
ih = acpi_md_intr_establish(irq->ar_irq, ipl, type, intr, iarg, mpsafe, xname);