PCIe Root Port Mode Routing Restriction

Versal ACAP Technical Reference Manual (AM011)

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1.4 English

In root port mode, incoming PCIe traffic to the CCI ACE-Lite port goes through the SMMU TBU3. In this situation, traffic from any source (e.g., PS, PL) to the CPM must go directly to the CPM without passing through a TBU. This restriction is shown in the following figure.

Figure 1. Restriction on PCIe Root Port Mode I/O Coherent Traffic