IOAPIC_REDTBL_HI
hi = db_ioapic_read(io_addr, IOAPIC_REDTBL_HI(i));
ioapic_write(io->io_addr, IOAPIC_REDTBL_HI(intpin->io_intpin),
ioapic_write(io->io_addr, IOAPIC_REDTBL_HI(intpin->io_intpin), high);