MmUnmapIoSpace

VOID __stdcall MmUnmapIoSpace(VOID *BaseAddress, UINT64 NumberOfBytes){
  UINT64 v2; 
  unsigned __int64 v3; 
  UINT64 v4; 
  NTSTATUS HasIoTracker; 
  _KTBFLUSH_TYPE v6; 
  NTSTATUS v7; 
  _MMPTE *PteBase; 
  UINT64 v9; 
  UINT64 v10; 
  unsigned int v11; 
  __int64 v12; 
  __int64 v13; 
  unsigned __int64 v14; 
  int v15; 
  _MI_TB_FLUSH_LIST TbFlushList[48]; 

  v2 = NumberOfBytes;
  v3 = (unsigned __int64)BaseAddress;
  v4 = (((unsigned __int16)BaseAddress & 0xFFF) + NumberOfBytes + 4095) >> 12;
  if( (dword_140CFA17C & 1) != 0 )
    MiRemovePteTracker(0i64, BaseAddress, (((unsigned __int16)BaseAddress & 0xFFF) + NumberOfBytes + 4095) >> 12);
  HasIoTracker = MiMappingHasIoTracker((VOID *)v3);
  v7 = MI_IS_PHYSICAL_ADDRESS((VOID *)v3);
  if( HasIoTracker == 1 )
    MiZeroAndFlushPtes((VOID *)v3, v4);
  PteBase = MmGetPteBase();
  v9 = (UINT64)PteBase + ((v3 >> 9) & 0x7FFFFFFFF8i64);
  if( !v7 )
  {
    MiReleasePtes(
      (_MI_SYSTEM_PTE_TYPE *)((char *)&stru_140C4DB30 + 4432),
      (_MMPTE *)((char *)PteBase + ((v3 >> 9) & 0x7FFFFFFFF8i64)),
      (unsigned int)v4,
      v6);
    return;
  }
  if( (v2 & 0x1FFFFF) != 0 )
  {
LABEL_9:
    MiUnmapLargePages((VOID *)v3, v2, MiVaSystemPtes);
    return;
  }
  memset(TbFlushList, 0i64, 0xB8u);
  do
  {
    v9 = (UINT64)PteBase + ((v9 >> 9) & 0x7FFFFFFFF8i64);
    --v7;
  }
  while( v7 );
  *(_QWORD *)&TbFlushList[6] = 0i64;
  v10 = v2 >> 21;
  TbFlushList[2] = 20;
  if( !HasIoTracker )
  {
    v11 = 0;
    v12 = MiSwizzleInvalidPte(768i64);
    if( (_DWORD)v10 )
    {
      v13 = (unsigned int)v10;
      v11 = v2 >> 21;
      do
      {
        v14 = v12;
        LOBYTE(v15) = MiPteInShadowRange(v9);
        if( v15 && (KeGetCurrentThread()->ApcState.Process->Flags3 & 0x1000) != 0 && (v12 & 1) != 0 )
          v14 = v12 | 0x8000000000000000ui64;
        *(_QWORD *)v9 = v14;
        MiInsertLargeTbFlushEntry(TbFlushList, 1ui64, v9);
        v9 += 8i64;
        --v13;
      }
      while( v13 );
      v3 = (unsigned __int64)BaseAddress;
      v2 = NumberOfBytes;
    }
    v9 -= 8i64 * v11;
  }
  if( MiInsertCachedPte((_MI_SYSTEM_PTE_TYPE *)((char *)&stru_140C4DB30 + 4432), (_MMPTE *)v9, (unsigned int)v10) != 1 )
  {
    MiFlushTbList(TbFlushList);
    goto LABEL_9;
  }
}

Referenced by: