typedef struct _MMPTE_SUBSECTION
{
    unsigned __int64 Valid : 1;
    unsigned __int64 Unused0 : 4;
    unsigned __int64 Protection : 5;
    unsigned __int64 Prototype : 1;
    unsigned __int64 Unused1 : 5;
    __int64 SubsectionAddress : 48;
} MMPTE_SUBSECTION, *PMMPTE_SUBSECTION;