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52 lines
2.6 KiB
52 lines
2.6 KiB
4 months ago
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Trusted Firmware-A
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==================
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Trusted Firmware-A (TF-A) is a reference implementation of secure world software
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for `Arm A-Profile architectures`_ (Armv8-A and Armv7-A), including an Exception
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Level 3 (EL3) `Secure Monitor`_. It provides a suitable starting point for
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productization of secure world boot and runtime firmware, in either the AArch32
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or AArch64 execution states.
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TF-A implements Arm interface standards, including:
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- `Power State Coordination Interface (PSCI)`_
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- `Trusted Board Boot Requirements CLIENT (TBBR-CLIENT)`_
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- `SMC Calling Convention`_
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- `System Control and Management Interface (SCMI)`_
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- `Software Delegated Exception Interface (SDEI)`_
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The code is designed to be portable and reusable across hardware platforms and
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software models that are based on the Armv8-A and Armv7-A architectures.
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In collaboration with interested parties, we will continue to enhance TF-A
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with reference implementations of Arm standards to benefit developers working
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with Armv7-A and Armv8-A TrustZone technology.
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Users are encouraged to do their own security validation, including penetration
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testing, on any secure world code derived from TF-A.
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More Info and Documentation
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---------------------------
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To find out more about Trusted Firmware-A, please `view the full documentation`_
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that is available through `trustedfirmware.org`_.
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--------------
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*Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.*
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.. _Armv7-A and Armv8-A: https://developer.arm.com/products/architecture/a-profile
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.. _Secure Monitor: http://www.arm.com/products/processors/technologies/trustzone/tee-smc.php
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.. _Power State Coordination Interface (PSCI): PSCI_
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.. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
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.. _Trusted Board Boot Requirements CLIENT (TBBR-CLIENT): https://developer.arm.com/docs/den0006/latest/trusted-board-boot-requirements-client-tbbr-client-armv8-a
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.. _SMC Calling Convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ARM_DEN0028B_SMC_Calling_Convention.pdf
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.. _System Control and Management Interface (SCMI): SCMI_
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.. _SCMI: http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
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.. _Software Delegated Exception Interface (SDEI): SDEI_
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.. _SDEI: http://infocenter.arm.com/help/topic/com.arm.doc.den0054a/ARM_DEN0054A_Software_Delegated_Exception_Interface.pdf
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.. _Arm A-Profile architectures: https://developer.arm.com/architectures/cpu-architecture/a-profile
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.. _view the full documentation: https://www.trustedfirmware.org/docs/tf-a
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.. _trustedfirmware.org: http://www.trustedfirmware.org
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