SH4_PCIC_IO_SIZE
#define SH4_PCIC_IO_MASK (SH4_PCIC_IO_SIZE-1)
sc->sc_iobus_space.bus_size = SH4_PCIC_IO_SIZE;
extent_free(io_ex, SH4_PCIC_IO, SH4_PCIC_IO_SIZE, EX_NOWAIT);