Intel® Stratix® 10 Hard Processor System Technical Reference Manual

ID 683222
Date 1/25/2024
Public
Document Table of Contents

4.5.3. I/O Coherency Bridge

The I/O coherency bridge (IOCB) manages I/O coherent accesses from the Cortex* -A53 MPCore, FPGA, TCU, and peripheral masters interfacing to the system interconnect.

These masters send both non-coherent and I/O coherent traffic to the IOCB. If a master issues a WriteUnique or WriteLineUnique ACE protocol request and that address corresponds to a cache line, the IOCB notifies the Cortex* -A53 MPCore processor to invalidate that data. The IOCB prefetches coherent permissions for requests from the coherency directory so that it can execute these requests in parallel with non-coherent requests and maintain high bandwidth.