Arm TrustZone Address Space Controller driver

Driver implementation for the TZC-400 TrustZone Address Space Controller.

The driver is designed to function regardless of whether a Memory Management Unit (MMU) is present. The primary role of the OwnedMmioPointer is to manage the lifetime of the peripheral, ensuring proper resource handling. In a system that includes an MMU, the peripheral's lifetime is dynamic because it is mapped into memory rather than having a fixed address. In a system without an MMU, the OwnedMmioPointer can be instantiated directly from the physical address of the register block, providing access to the peripheral without requiring memory mapping.

Implemented features

Reading the TZC configuration and status
Managing regions and setting up secure and/or non-secure access rights
Non-blocking read/write functions
Reading, masking and clearing interrupts
100% unit test coverage

Future plans

Use the AID_WIDTH configuration value to manipulate the FailIDRegister.

License

The project is MIT and Apache-2.0 dual licensed, see LICENSE-Apache-2.0 and LICENSE-MIT.

Maintainers

arm-tzc is a trustedfirmware.org maintained project. All contributions are ultimately merged by the maintainers listed below.

Bálint Dobszay balint.dobszay@arm.com balint-dobszay-arm
Imre Kis imre.kis@arm.com imre-kis-arm
Sandrine Afsa sandrine.afsa@arm.com sandrine-bailleux-arm

Contributing

Please follow the directions of the Trusted Firmware Processes

Contributions are handled through review.trustedfirmware.org.

Arm trademark notice

Arm is a registered trademark of Arm Limited (or its subsidiaries or affiliates).

This project uses some of the Arm product, service or technology trademarks, as listed in the Trademark List, in accordance with the Arm Trademark Use Guidelines.

Subsequent uses of these trademarks throughout this repository do not need to be prefixed with the Arm word trademark.