2.10. Distributed Virtual Memory (DVM) messages

The ACE slave interfaces support Distributed Virtual Memory (DVM) messages through their regular AC and CR channels. The ACE-Lite interfaces all contain AC and CR channels to support DVM messages only. Each slave interface has a programmable enable bit to determine whether it supports the issuing of AC requests for DVM messages. DVM messages are handled as regular transactions in the CCI-400, except that they are decoded based on the DVM message indicator, instead of the address, to ensure that multi-transaction DVM messages are correctly ordered.

The Snoop Control Registers and Control Override Register control the issuing of DVM message requests. See Snoop Control Registers and Control Override Register.

Note

A master that issues DVM messages must also be able to receive DVM messages. The slave interface through which the master connects must have DVM messages enabled.

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