Visible to Intel only — GUID: sjb1677613856748
Ixiasoft
Visible to Intel only — GUID: sjb1677613856748
Ixiasoft
4.1.5.1.2. Non-coherent Agent Interface Unit (NCAIU)
NCAIU0 is configured for ACE-lite to support I/O coherence from the fabric via the F2H bridge. NCAIU1 is configured for ACE-lite to support I/O coherence from the GIC. NCIU2 is configured for ACE-lite to support I/O coherence from PSS NoC. NCAIU2 is configured for ACE-lite + DVM to support I/O coherence and DVM messages from the SMMU.
For each NCAIU, the following credit counters are implemented:
- CMD message credit counter per instance of DCE
- CMD message credit counter per instance of DMI
- CMD message credit counter per instance of DII
For each NCAIU, the following resources are implemented based on message credits:
- Snoop transaction table: This transaction table is sized based on SNP message credits
The following resources are implemented per NCAIU:
- Outstanding transaction table control entries which limit the number of outstanding transactions an NCAIU can have at a given time.