readme.rst

   1 Trusted Firmware-A
   2 ==================
   3
   4 Trusted Firmware-A (TF-A) is a reference implementation of secure world software
   5 for `Arm A-Profile architectures`_ (Armv8-A and Armv7-A), including an Exception
   6 Level 3 (EL3) `Secure Monitor`_. It provides a suitable starting point for
   7 productization of secure world boot and runtime firmware, in either the AArch32
   8 or AArch64 execution states.
   9
  10 TF-A implements Arm interface standards, including:
  11
  12 -  `Power State Coordination Interface (PSCI)`_
  13 -  `Trusted Board Boot Requirements CLIENT (TBBR-CLIENT)`_
  14 -  `SMC Calling Convention`_
  15 -  `System Control and Management Interface (SCMI)`_
  16 -  `Software Delegated Exception Interface (SDEI)`_
  17
  18 The code is designed to be portable and reusable across hardware platforms and
  19 software models that are based on the Armv8-A and Armv7-A architectures.
  20
  21 In collaboration with interested parties, we will continue to enhance TF-A
  22 with reference implementations of Arm standards to benefit developers working
  23 with Armv7-A and Armv8-A TrustZone technology.
  24
  25 Users are encouraged to do their own security validation, including penetration
  26 testing, on any secure world code derived from TF-A.
  27
  28 More Info and Documentation
  29 ---------------------------
  30
  31 To find out more about Trusted Firmware-A, please `view the full documentation`_
  32 that is available through `trustedfirmware.org`_.
  33
  34 --------------
  35
  36 *Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.*
  37
  38 .. _Armv7-A and Armv8-A: https://developer.arm.com/products/architecture/a-profile
  39 .. _Secure Monitor: http://www.arm.com/products/processors/technologies/trustzone/tee-smc.php
  40 .. _Power State Coordination Interface (PSCI): PSCI_
  41 .. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
  42 .. _Trusted Board Boot Requirements CLIENT (TBBR-CLIENT): https://developer.arm.com/docs/den0006/latest/trusted-board-boot-requirements-client-tbbr-client-armv8-a
  43 .. _SMC Calling Convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ARM_DEN0028B_SMC_Calling_Convention.pdf
  44 .. _System Control and Management Interface (SCMI): SCMI_
  45 .. _SCMI: http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
  46 .. _Software Delegated Exception Interface (SDEI): SDEI_
  47 .. _SDEI: http://infocenter.arm.com/help/topic/com.arm.doc.den0054a/ARM_DEN0054A_Software_Delegated_Exception_Interface.pdf
  48 .. _Arm A-Profile architectures: https://developer.arm.com/architectures/cpu-architecture/a-profile
  49 .. _view the full documentation: https://www.trustedfirmware.org/docs/tf-a
  50 .. _trustedfirmware.org: http://www.trustedfirmware.org
  51