MmGetHighestPhysicalPage

UINT64 __stdcall MmGetHighestPhysicalPage(UINT64 PartitionId){
  return *(_QWORD *)(*(_QWORD *)(qword_140C4E388 + 8i64 * (unsigned __int16)PartitionId) + 6920i64);
}

Referenced by:

ExpQuerySystemInformation
PfpCopyUserPfnPrioRequest
PopAllocateHiberContext
PopBuildMemoryImageHeader
PopPreallocateHibernateMemory