iokit/Kernel/IONVRAM.cpp

169       _piImage = _nvramImage + _piPartitionOffset;
172       bzero(_piImage, _piPartitionSize);
204     _piImage = _nvramImage + _piPartitionOffset;
576   if ((_piImage == 0) || (length <= 0)) return 0;
582   bcopy(buffer, _piImage + 4, length);
585   *(UInt32 *)_piImage = length;
692     if (_piImage != 0) {
693       propDataLength = *(UInt32 *)_piImage;
695 	propObject = OSData::withBytes(_piImage + 4, propDataLength);
699 	// Clear the length from _piImage and mark dirty.
700 	*(UInt32 *)_piImage = 0;