PTE_PCD
#define PGC_UCMINUS PTE_PCD /* UC but mtrr can override */
#define PGC_UC (PTE_PWT | PTE_PCD) /* hard UC */
if ((opte & PTE_PCD) != 0)
pmap_pte_clearbits(pte, PTE_PCD);
*pte = lapic_base | PTE_W | PTE_P | PTE_PCD | pmap_pg_g | pmap_pg_nx;
return PTE_PCD;
npte |= PTE_PCD;