NBPD_L2
#define NBPD_L2 (1UL << L2_SHIFT) /* # bytes mapped by L2 ent (2MB) */
#define NBPD_L2 (1UL << L2_SHIFT) /* # bytes mapped by L2 ent (2MB) */
#define NBPD_L2 (1ULL << L2_SHIFT) /* # bytes mapped by L2 ent (2MB) */
#define NBPD_L2 (1UL << L2_SHIFT) /* # bytes mapped by L2 ent (4MB) */