_HUGE_PFN_NUMBER

Metadatacopy
struct _HUGE_PFN_NUMBER {
    union {
        unsigned __int64 BasePage : 22;/* 0x0:0  8 */
        unsigned __int64 PageCount : 22;/* 0x0:0  8 */
        unsigned __int64 EntireValue;/* 0x0  8 */
    };/* 0x0  8 */
};