__PMAP_PTP_SHIFT
#define __PMAP_PTP_INDEX(va) (((va) >> __PMAP_PTP_SHIFT) & (__PMAP_PTP_N - 1))
(((va) + (1 << __PMAP_PTP_SHIFT) - 1) & ~((1 << __PMAP_PTP_SHIFT) - 1))
#define __PMAP_PTP_INDEX(va) (((va) >> __PMAP_PTP_SHIFT) & (__PMAP_PTP_N - 1))