NBPML4
#define PML4MASK (NBPML4-1)
*pva = (va & ~(long)(NBPML4 - 1)) + NBPML4;
*pva = (va & ~(long)(NBPML4 - 1)) + NBPML4;
va_next = (sva + NBPML4) & ~PML4MASK;
va_next = (sva + NBPML4) & ~PML4MASK;
va = (va & ~(long)(NBPML4 - 1)) + NBPML4;
va_next = (sva + NBPML4) & ~PML4MASK;