System Memory Management Unit

Versal ACAP Technical Reference Manual (AM011)

Document ID
AM011
Release Date
2022-04-26
Revision
1.4 English

The system memory management unit (SMMU) supports memory virtualization and access protection of peripherals and memory. The main functions of the SMMU include:

  • Address translation unit confines memory space
  • Transaction security state control
  • Memory and peripheral access protection

These functions are performed with a combination of the seven translation buffer units (TBU 0 to n). These are in the path of incoming AXI interfaces outside of the FPD to the CCI. The translation and protection tables that are cached in the TBU are updated by the SMMU translation control unit (TCU).