Memory Mapped Interfaces - 2021.2 English

Vitis Unified Software Platform Documentation: Application Acceleration Development (UG1393)

Document ID
UG1393
ft:locale
English (United States)
Release Date
2021-12-15
Version
2021.2 English

Memory mapped interfaces are inferred from pointer parameters. They allow kernels to read and write data in global memory, which is the memory that is shared between kernels and the host application. Therefore, memory mapped interfaces are a convenient way of sharing data across different elements of the accelerated application, but interfaces are only allowed for sequential and pipelined kernel execution modes as described in Kernel Properties.

To customize the default interfaces assigned by the Vitis tools during compilation, you can use the INTERFACE pragma. For optimal performance, Xilinx recommends performing burst transfers, if possible up to the AXI protocol limit of 4 KB per transfer.