barge: Not sure yet. Here's one more morsel...
"...The TrustZone-optimized software is an evolution of the Security Module developed by Trusted Logic,
which operates as a secure kernel. This can be ported to any ARM CPU, and provides security
roadmap compatibility for future TrustZone devices. The Security Module by Trusted Logic and the
TrustZone-optimized software enjoy the same security protocols, which means that secure
applications that are developed for the Security Module will be compatible with TrustZone-enabled
devices..."