arm-trusted-firmware / readme.rst
Trusted Firmware-A

Trusted Firmware-A is a reference implementation of secure world software for
`Arm A-Profile architectures`_ (Armv8-A and Armv7-A), including an
Exception Level 3 (EL3)`Secure Monitor`_. It provides a suitable starting point
for productization of secure world boot and runtime firmware, in either the
|AArch32| or |AArch64| execution states.

|TF-A| implements Arm interface standards, including:

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

The code is designed to be portable and reusable across hardware platforms and
software models that are based on the Armv8-A and Armv7-A architectures.

In collaboration with interested parties, we will continue to enhance |TF-A|
with reference implementations of Arm standards to benefit developers working
with Armv7-A and Armv8-A TrustZone technology.

Users are encouraged to do their own security validation, including penetration
testing, on any secure world code derived from TF-A.

Read More

To find out more about Trusted Firmware-A, please `view the full documentation`_
that is available through ``_.


*Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.*

.. _Armv7-A and Armv8-A:
.. _Secure Monitor:
.. _Power State Coordination Interface (PSCI): PSCI_
.. _PSCI:
.. _Trusted Board Boot Requirements CLIENT (TBBR-CLIENT):
.. _SMC Calling Convention:
.. _System Control and Management Interface (SCMI): SCMI_
.. _SCMI:
.. _Software Delegated Exception Interface (SDEI): SDEI_
.. _SDEI:
.. _Arm A-Profile architectures:
.. _view the full documentation: