Control apparatus, information processing apparatus, and data transferring method

An information processing apparatus comprising:

• a memory;
• a processor which is accessible to the memory;
• a data transfer unit which transfers data to the memory not through the processor;
• an input/output controller which starts to transfer data from an input/output device to write the data to a given area in the memory not through the processor but through the data transfer unit, reads data out of the given area in the memory after last data is transferred, and issues an interrupt indicative of completion of data transfer after confirming that all of the transferred data has been written to the memory;
• and
• an interrupt controller which receives the interrupt from the input/output controller and transmits the interrupt to the processor.