Я прочитал в trustzone_security_whitepaper.pdf, глава 5.5 API TrustZone,
>To encourage the development of security solutions ARM have produced a
>standardized software API, called the TrustZone API (TZAPI), which defines
>a software interface which client applications running in the rich operating
>environment can use to interact with a security environment.
и 5.5.1 Доступность API
>"The TrustZone API can be downloaded for free from the ARM website"
Я искал на веб-сайте arm, но не нашел записи в списке API TrustZone или руководствах?