L1_FRAME
#define L1_TRUNC_BLOCK(x) ((x) & L1_FRAME)
#define PTP_FRAME_INITIALIZER { L1_FRAME, L2_FRAME, L3_FRAME, L4_FRAME }
#define PTP_FRAME_INITIALIZER { L1_FRAME, L2_FRAME }
#define XPTE_MASK L1_FRAME
#define pl1_i(VA) (((VA_SIGN_POS(VA)) & L1_FRAME) >> L1_SHIFT)