PCI_MIN_GNT
lt = uimin(PCI_MIN_GNT(ic) * bus_frequency / 4, 255);
MIN(sc->sc_max_lattimer, MAX(0x10, 8 * PCI_MIN_GNT(icr)));
lattimer = MAX(0x10, MIN(0xf8, 8 * PCI_MIN_GNT(icr)));
printf(" Minimum Grant: 0x%02x\n", PCI_MIN_GNT(rval));
pd->min_gnt = PCI_MIN_GNT(icr);