Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public
Document Table of Contents

4.1.5.19.1. CHI Support

CCU supports CHI-A and CHI-B with the following exceptions:

  • CHI protocol credits and retry mechanisms are not supported
  • System cache allocation is based on memory attribute rather than the LikelyShared attribute
  • CHI-A barriers are not supported
  • CHI-B trace mechanisms are not supported
  • Only little-endian is supported for CHI-B atomic operations
  • CHI-B WriteUniqueStashPtl and WriteUniqueStashFull are not supported
  • CHI-B valid StashNID values must be identified by configuration fabric unit IDs