Notes:
- 'Near_Mem_IO' is for memory-mapped IO near the CPU. It includes:
- CLINT (Core Local Interruptor):
- MSIP: for software interrupts
- MTIME and MTIMECMP locations: to read TIME, and to generate timer interrupts
- Other:
- Example: configs for caches, alternate FPUs, ...
- Near_Mem_IO_AXI4.bsv: current version, using AXI4 interfaces, and
sitting as a slave on the core-local AXI4 interconnect.
- Near_Mem_IO.bsv: older version that used to be hooked directly into
MMU_Cache, using it's own Req/Rsp packet data type.
Now obsolete; not used.