iokit/IOKit/IONVRAM.h

149   virtual IOReturn readXPRAM(IOByteCount offset, UInt8 *buffer,
150 			     IOByteCount length);
151   virtual IOReturn writeXPRAM(IOByteCount offset, UInt8 *buffer,
152 			      IOByteCount length);
164 				      IOByteCount offset, UInt8 *buffer,
165 				      IOByteCount length);
168 				       IOByteCount offset, UInt8 *buffer,
169 				       IOByteCount length);
171   virtual IOByteCount savePanicInfo(UInt8 *buffer, IOByteCount length);