Trusted Firmware-A

Overview

Trusted Firmware-A (TF-A) provides a reference implementation of secure world software for Armv7-A, Armv8-A and Armv9-A, including a Secure Monitor executing at Exception Level 3 (EL3) and a Secure Partition Manager running at Secure EL2 (S-EL2) of the Arm architecture.

Originally known as Arm Trusted Firmware, an Arm open source project since October 2013, with the recent launch of Trusted Firmware community project, TF-A has been migrated to an open governance model and it's now fully part of the Trusted Firmware community.

All the relevant content about TF-A can be found at these locations:

• TF-A Codebase
• TF-A Mailing List
• TF-A-Tests Codebase
• TF-A-Tests Mailing List
• Wiki pages

Trusted Firmware-A implements various Arm interface standards, such as:

• Power State Coordination Interface (PSCI)
• Trusted Board Boot Requirements (TBBR)
• SMC Calling Convention  (SMCCC)
• System Control and Management Interface (SCMI)
• Software Delegated Exception Interface (SDEI)

Where possible, the code is designed for reuse or porting to other Armv7-A, Armv8-A and Armv9-A model and hardware platforms.

Trusted Firmware-A is provided as part of the Trusted Firmware community project under a BSD-3-Clause license and contributions are accepted under the term of Developer Certificate of Origin.

Past News

Check out the past project news