2.6 Barriers

The DMBs and DSBs barriers are based on the ARM architecture and AMBA 4 protocol. The EOBarriers and ECBarriers barriers are based on the CHI architecture.

DMBs and DSBs that are injected into the system must be converted to EOBarriers and ECBarriers respectively, at the interface to the CCN-502. All injected barriers are sent first to the MN, then to both HN-Is, to create the required sequence for previous device-type or NC accesses.

The CCN-502 supports barriers in the following manner:

For more information about barriers, see the ARM® AMBA® 5 CHI Architecture Specification and the ARM® AMBA® AXI and ACE Protocol Specification.

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