TTE_TO_TTEPFN
i = TTE_TO_TTEPFN(orig_old);
j = TTE_TO_TTEPFN(cur);
k = TTE_TO_TTEPFN(new);
i = TTE_TO_TTEPFN(orig_old);
k = TTE_TO_TTEPFN(new);
j = TTE_TO_TTEPFN(cur);
k = TTE_TO_TTEPFN(new);
ASSERT(TTE_TO_TTEPFN(&ttemod) == TTE_TO_TTEPFN(&tte));
ASSERT(TTE_TO_TTEPFN(&ttevalue) == 0);
pfn_t pfn = TTE_TO_TTEPFN(&tte);