Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 2/14/2023
Public

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5.4.8. Quality of Service Arbitration

The TCU generates page table walks for all the TBUs. If there are multiple outstanding transactions in the TCU, the TBU with the highest quality of service (QoS) is given priority. For individual prefetch accesses, the SMMU uses the QoS value of the hit transaction. For transactions with the same QoS value, the SMMU translates the transactions in the order they occur. The QoS for each TBU is programmed in the System MMU TBU Quality of Service 0 (SMMU_TBUQOS0) register at offset 0x2100.