pci_prop_get8
prop->ppd_rev = pci_prop_get8(acc, prop, PCI_CONF_REVID);
prop->ppd_class = pci_prop_get8(acc, prop, PCI_CONF_BASCLASS);
prop->ppd_subclass = pci_prop_get8(acc, prop, PCI_CONF_SUBCLASS);
prop->ppd_pi = pci_prop_get8(acc, prop, PCI_CONF_PROGCLASS);
htype = pci_prop_get8(acc, prop, PCI_CONF_HEADER);
prop->ppd_mingrt = pci_prop_get8(acc, prop, PCI_CONF_MIN_G);
prop->ppd_maxlat = pci_prop_get8(acc, prop, PCI_CONF_MAX_L);
prop->ppd_ipin = pci_prop_get8(acc, prop, PCI_CONF_IPIN);
cap_off = pci_prop_get8(acc, prop, PCI_CONF_CAP_PTR);
uint8_t cap_id = pci_prop_get8(acc, prop, cap_addr);
cap_off = pci_prop_get8(acc, prop, cap_addr + PCI_CAP_NEXT_PTR);