MiActOnMirrorBitmap

VOID __fastcall MiActOnMirrorBitmap(_RTL_BITMAP_EX *BitMap, _MI_MIRROR_BITMAP_OPERATION Operation){
  PHYSICAL_MEMORY_DESCRIPTOR *v2; 
  unsigned int i; 
  UINT64 PageCount; 
  UINT64 BasePage; 

  v2 = MmPhysicalMemoryBlock;
  for( i = 0; i < v2->NumberOfRuns; ++i )
  {
    PageCount = v2->Run[i].PageCount;
    BasePage = v2->Run[i].BasePage;
    if( Operation )
    {
      if( Operation == MiMirrorBitmapSetAllBits )
      {
        RtlSetBitsEx(BitMap, BasePage, PageCount);
      }
      else if( Operation == MiMirrorBitmapClearAllBits )
      {
        RtlClearBitsEx(BitMap, BasePage, PageCount);
      }
    }
    else if( !MiSplitMirrorBitMap(BitMap, BasePage, PageCount) )
    {
      return;
    }
  }
}

Referenced by:

MiMirrorBrownPhase
MiUpdateMirrorBitmaps
MmDuplicateMemory