Controller Buffer Memory Bank Segmentation for Multi-Threaded Prefetch

The single prefetch register is segmented into multiple thread-specific prefetch registers (one per thread). Each thread has its own dedicated prefetch register that stores the prefetch address specific to that thread's buffer memory access pattern. This segmentation prevents data corruption when threads switch because each thread's prefetch address is independently maintained, eliminating the reliability issue while accepting increased device complexity.

The system performs preliminary action by pre-loading data into buffer memory using thread-specific prefetch registers before the actual data processing occurs. The prefetch address in each register enables the controller to fetch data in advance during idle periods or when threads are switching, ensuring prefetch constraints are met without requiring complex ready signal mechanisms. This maintains reliability while avoiding the complexity and bandwidth reduction associated with ready signals.

The system maintains continuity of useful action by enabling the microprocessor to initiate data processing immediately after writing the prefetch address to the thread-specific prefetch register, without waiting for the prefetch period to complete. The controller continuously fetches data from external devices using the stored prefetch addresses in the background, allowing the microprocessor to proceed with productive work while data is being pre-loaded. This eliminates idle waiting time and maintains full bandwidth utilization while still meeting prefetch constraints.