@param Operation Indicates if the bus master is going to read or write to system memory.\r
@param HostAddress The system memory address to map to the device.\r
@param NumberOfBytes On input, the number of bytes to map.\r
- On output the number of bytes that were mapped.\r
+ On output, the number of bytes that were mapped.\r
@param DeviceAddress The resulting map address for the bus master device to use to access the\r
hosts HostAddress.\r
@param Mapping A resulting value to pass to Unmap().\r