LEVEL_OFFSET
pfn += mmu_btop(vaddr & LEVEL_OFFSET(ht->ht_level));
(vaddr & LEVEL_OFFSET(l + 1)) != 0)
(vaddr & LEVEL_OFFSET(l)) == 0)
*pap += va & LEVEL_OFFSET(level);
if ((paddr & LEVEL_OFFSET(l)) == 0 &&