PG_UNCACHED
npte |= PG_UNCACHED;
npte |= PG_UNCACHED;
newmode = mode & PGF_CACHED ? PG_CACHED : PG_UNCACHED;
if (*npte & PG_UNCACHED)
*npte = (*npte & ~PG_CACHEMODE) | PG_UNCACHED;
*npte = (*npte & ~PG_CACHEMODE) | PG_UNCACHED;