6.7.3.4.5 Zeroization of System Controller and User Cryptoprocessors Memories

For both cryptoprocessors, an on-demand purge function is executed to zeroize all the internal memories. Both cryptoprocessors support a purge function to clear all internal memories.

Important: In PolarFire® FPGA devices, the PF_DRI macro can be used from the fabric to exercise the PURGE functionality of the user cryptoprocessor. Once the data is purged, it cannot be recovered, so use this functionality with caution.