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+Trusted Firmware-A - version 2.1
+================================
+
+.. section-numbering::
+    :suffix: .
+
+.. contents::
+
+Trusted Firmware-A (TF-A) provides a reference implementation of secure world
+software for `Armv7-A and Armv8-A`_, including a `Secure Monitor`_ executing
+at Exception Level 3 (EL3). It implements various Arm interface standards,
+such as:
+
+-  The `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)`_
+
+Where possible, the code is designed for reuse or porting to other Armv7-A and
+Armv8-A model and hardware platforms.
+
+This release provides a suitable starting point for productization of secure
+world boot and runtime firmware, in either the AArch32 or AArch64 execution
+states.
+
+Users are encouraged to do their own security validation, including penetration
+testing, on any secure world code derived from TF-A.
+
+Arm will continue development in collaboration with interested parties to
+provide a full reference implementation of Secure Monitor code and Arm standards
+to the benefit of all developers working with Armv7-A and Armv8-A TrustZone
+technology.
+
+Documentation contents
+----------------------
+
+The `Trusted Firmware-A Documentation Contents`_ page contains an overview of
+the documentation that is available, with links to facilitate easier browsing.
+
+License
+-------
+
+The software is provided under a BSD-3-Clause `license`_. Contributions to this
+project are accepted under the same license with developer sign-off as
+described in the `Contributing Guidelines`_.
+
+This project contains code from other projects as listed below. The original
+license text is included in those source files.
+
+-  The libc source code is derived from `FreeBSD`_ and `SCC`_. FreeBSD uses
+   various BSD licenses, including BSD-3-Clause and BSD-2-Clause. The SCC code
+   is used under the BSD-3-Clause license with the author's permission.
+
+-  The libfdt source code is disjunctively dual licensed
+   (GPL-2.0+ OR BSD-2-Clause). It is used by this project under the terms of
+   the BSD-2-Clause license. Any contributions to this code must be made under
+   the terms of both licenses.
+
+-  The LLVM compiler-rt source code is disjunctively dual licensed
+   (NCSA OR MIT). It is used by this project under the terms of the NCSA
+   license (also known as the University of Illinois/NCSA Open Source License),
+   which is a permissive license compatible with BSD-3-Clause. Any
+   contributions to this code must be made under the terms of both licenses.
+
+-  The zlib source code is licensed under the Zlib license, which is a
+   permissive license compatible with BSD-3-Clause.
+
+-  Some STMicroelectronics platform source code is disjunctively dual licensed
+   (GPL-2.0+ OR BSD-3-Clause). It is used by this project under the terms of the
+   BSD-3-Clause license. Any contributions to this code must be made under the
+   terms of both licenses.
+
+Functionality
+-------------
+
+-  Initialization of the secure world, for example exception vectors, control
+   registers and interrupts for the platform.
+
+-  Library support for CPU specific reset and power down sequences. This
+   includes support for errata workarounds and the latest Arm DynamIQ CPUs.
+
+-  Drivers to enable standard initialization of Arm System IP, for example
+   Generic Interrupt Controller (GIC), Cache Coherent Interconnect (CCI),
+   Cache Coherent Network (CCN), Network Interconnect (NIC) and TrustZone
+   Controller (TZC).
+
+-  A generic `SCMI`_ driver to interface with conforming power controllers, for
+   example the Arm System Control Processor (SCP).
+
+-  SMC (Secure Monitor Call) handling, conforming to the `SMC Calling
+   Convention`_ using an EL3 runtime services framework.
+
+-  `PSCI`_ library support for CPU, cluster and system power management
+   use-cases.
+   This library is pre-integrated with the AArch64 EL3 Runtime Software, and
+   is also suitable for integration with other AArch32 EL3 Runtime Software,
+   for example an AArch32 Secure OS.
+
+-  A minimal AArch32 Secure Payload (SP\_MIN) to demonstrate `PSCI`_ library
+   integration with AArch32 EL3 Runtime Software.
+
+-  Secure Monitor library code such as world switching, EL1 context management
+   and interrupt routing.
+   When a Secure-EL1 Payload (SP) is present, for example a Secure OS, the
+   AArch64 EL3 Runtime Software must be integrated with a Secure Payload
+   Dispatcher (SPD) component to customize the interaction with the SP.
+
+-  A Test SP and SPD to demonstrate AArch64 Secure Monitor functionality and SP
+   interaction with PSCI.
+
+-  SPDs for the `OP-TEE Secure OS`_, `NVIDIA Trusted Little Kernel`_
+   and `Trusty Secure OS`_.
+
+-  A Trusted Board Boot implementation, conforming to all mandatory TBBR
+   requirements. This includes image authentication, Firmware Update (or
+   recovery mode), and packaging of the various firmware images into a
+   Firmware Image Package (FIP).
+
+-  Pre-integration of TBB with the Arm CryptoCell product, to take advantage of
+   its hardware Root of Trust and crypto acceleration services.
+
+-  Reliability, Availability, and Serviceability (RAS) functionality, including
+
+   -  A Secure Partition Manager (SPM) to manage Secure Partitions in
+      Secure-EL0, which can be used to implement simple management and
+      security services.
+
+   -  An SDEI dispatcher to route interrupt-based SDEI events.
+
+   -  An Exception Handling Framework (EHF) that allows dispatching of EL3
+      interrupts to their registered handlers, to facilitate firmware-first
+      error handling.
+
+-  A dynamic configuration framework that enables each of the firmware images
+   to be configured at runtime if required by the platform. It also enables
+   loading of a hardware configuration (for example, a kernel device tree)
+   as part of the FIP, to be passed through the firmware stages.
+
+-  Support for alternative boot flows, for example to support platforms where
+   the EL3 Runtime Software is loaded using other firmware or a separate
+   secure system processor, or where a non-TF-A ROM expects BL2 to be loaded
+   at EL3.
+
+-  Support for the GCC, LLVM and Arm Compiler 6 toolchains.
+
+-  Support for combining several libraries into a "romlib" image that may be
+   shared across images to reduce memory footprint. The romlib image is stored
+   in ROM but is accessed through a jump-table that may be stored
+   in read-write memory, allowing for the library code to be patched.
+
+-  A prototype implementation of a Secure Partition Manager (SPM) that is based
+   on the SPCI Alpha 1 and SPRT draft specifications.
+
+-  Support for ARMv8.3 pointer authentication in the normal and secure worlds.
+   The use of pointer authentication in the normal world is enabled whenever
+   architectural support is available, without the need for additional build
+   flags. Use of pointer authentication in the secure world remains an
+   experimental configuration at this time and requires the ``ENABLE_PAUTH``
+   build flag to be set.
+
+-  Position-Independent Executable (PIE) support. Initially for BL31 only, with
+   further support to be added in a future release.
+
+For a full description of functionality and implementation details, please
+see the `Firmware Design`_ and supporting documentation. The `Change Log`_
+provides details of changes made since the last release.
+
+Platforms
+---------
+
+Various AArch32 and AArch64 builds of this release have been tested on r0, r1
+and r2 variants of the `Juno Arm Development Platform`_.
+
+The latest version of the AArch64 build of TF-A has been tested on the following
+Arm FVPs without shifted affinities, and that do not support threaded CPU cores
+(64-bit host machine only).
+
+The FVP models used are Version 11.5 Build 33, unless otherwise stated.
+
+-  ``FVP_Base_AEMv8A-AEMv8A``
+-  ``FVP_Base_AEMv8A-AEMv8A-AEMv8A-AEMv8A-CCN502``
+-  ``FVP_Base_RevC-2xAEMv8A``
+-  ``FVP_Base_Cortex-A32x4``
+-  ``FVP_Base_Cortex-A35x4``
+-  ``FVP_Base_Cortex-A53x4``
+-  ``FVP_Base_Cortex-A55x4+Cortex-A75x4``
+-  ``FVP_Base_Cortex-A55x4``
+-  ``FVP_Base_Cortex-A57x1-A53x1``
+-  ``FVP_Base_Cortex-A57x2-A53x4``
+-  ``FVP_Base_Cortex-A57x4-A53x4``
+-  ``FVP_Base_Cortex-A57x4``
+-  ``FVP_Base_Cortex-A72x4-A53x4``
+-  ``FVP_Base_Cortex-A72x4``
+-  ``FVP_Base_Cortex-A73x4-A53x4``
+-  ``FVP_Base_Cortex-A73x4``
+-  ``FVP_Base_Cortex-A75x4``
+-  ``FVP_Base_Cortex-A76x4``
+-  ``FVP_Base_Cortex-A76AEx4`` (Tested with internal model)
+-  ``FVP_Base_Cortex-A76AEx8`` (Tested with internal model)
+-  ``FVP_Base_Neoverse-N1x4`` (Tested with internal model)
+-  ``FVP_Base_Deimos``
+-  ``FVP_CSS_SGI-575`` (Version 11.3 build 42)
+-  ``FVP_CSS_SGM-775`` (Version 11.3 build 42)
+-  ``FVP_RD_E1Edge`` (Version 11.3 build 42)
+-  ``FVP_RD_N1Edge`` (Version 11.3 build 42)
+-  ``Foundation_Platform``
+
+The latest version of the AArch32 build of TF-A has been tested on the following
+Arm FVPs without shifted affinities, and that do not support threaded CPU cores
+(64-bit host machine only).
+
+-  ``FVP_Base_AEMv8A-AEMv8A``
+-  ``FVP_Base_Cortex-A32x4``
+
+NOTE: The ``FVP_Base_RevC-2xAEMv8A`` FVP only supports shifted affinities.
+
+The Foundation FVP can be downloaded free of charge. The Base FVPs can be
+licensed from Arm. See the `Arm FVP website`_.
+
+All the above platforms have been tested with `Linaro Release 18.04`_.
+
+This release also contains the following platform support:
+
+-  Allwinner sun50i_a64 and sun50i_h6
+-  Amlogic Meson S905 (GXBB)
+-  Amlogic Meson S905x (GXL)
+-  Arm Juno Software Development Platform
+-  Arm Neoverse N1 System Development Platform (N1SDP)
+-  Arm Neoverse Reference Design N1 Edge (RD-N1-Edge) FVP
+-  Arm Neoverse Reference Design E1 Edge (RD-E1-Edge) FVP
+-  Arm SGI-575 and SGM-775
+-  Arm Versatile Express FVP
+-  HiKey, HiKey960 and Poplar boards
+-  Intel Stratix 10 SoC FPGA
+-  Marvell Armada 3700 and 8K
+-  MediaTek MT6795 and MT8173 SoCs
+-  NVIDIA T132, T186 and T210 SoCs
+-  NXP QorIQ LS1043A, i.MX8MM, i.MX8MQ, i.MX8QX, i.MX8QM and i.MX7Solo WaRP7
+-  QEMU
+-  Raspberry Pi 3
+-  Renesas R-Car Generation 3
+-  RockChip RK3328, RK3368 and RK3399 SoCs
+-  Socionext UniPhier SoC family and SynQuacer SC2A11 SoCs
+-  STMicroelectronics STM32MP1
+-  Texas Instruments K3 SoCs
+-  Xilinx Versal and Zynq UltraScale + MPSoC
+
+Still to come
+-------------
+
+-  Support for additional platforms.
+
+-  Refinements to Position Independent Executable (PIE) support.
+
+-  Refinements to the SPCI-based SPM implementation as the draft SPCI and SPRT
+   specifications continue to evolve.
+
+-  Documentation enhancements.
+
+-  Ongoing support for new architectural features, CPUs and System IP.
+
+-  Ongoing support for new Arm system architecture specifications.
+
+-  Ongoing security hardening, optimization and quality improvements.
+
+For a full list of detailed issues in the current code, please see the `Change
+Log`_ and the `issue tracker`_.
+
+Getting started
+---------------
+
+See the `User Guide`_ for instructions on how to download, install, build and
+use TF-A with the Arm `FVP`_\ s.
+
+See the `Firmware Design`_ for information on how TF-A works.
+
+See the `Porting Guide`_ as well for information about how to use this
+software on another Armv7-A or Armv8-A platform.
+
+See the `Contributing Guidelines`_ for information on how to contribute to this
+project and the `Acknowledgments`_ file for a list of contributors to the
+project.
+
+IRC channel
+~~~~~~~~~~~
+
+Development discussion takes place on the #trusted-firmware-a channel
+on the Freenode IRC network. This is not an official support channel.
+If you have an issue to raise, please use the `issue tracker`_.
+
+Feedback and support
+~~~~~~~~~~~~~~~~~~~~
+
+Arm welcomes any feedback on TF-A. If you think you have found a security
+vulnerability, please report this using the process defined in the TF-A
+`Security Center`_. For all other feedback, please use the
+`issue tracker`_.
+
+Arm licensees may contact Arm directly via their partner managers.
+
+Security advisories
+-------------------
+
+-  `Security Advisory TFV-1`_
+-  `Security Advisory TFV-2`_
+-  `Security Advisory TFV-3`_
+-  `Security Advisory TFV-4`_
+-  `Security Advisory TFV-5`_
+-  `Security Advisory TFV-6`_
+-  `Security Advisory TFV-7`_
+-  `Security Advisory TFV-8`_
+
+
+--------------
+
+*Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.*
+
+.. _Armv7-A and Armv8-A: https://developer.arm.com/products/architecture/a-profile
+.. _Secure Monitor: http://www.arm.com/products/processors/technologies/trustzone/tee-smc.php
+.. _Power State Coordination Interface (PSCI): PSCI_
+.. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
+.. _Trusted Board Boot Requirements CLIENT (TBBR-CLIENT): https://developer.arm.com/docs/den0006/latest/trusted-board-boot-requirements-client-tbbr-client-armv8-a
+.. _SMC Calling Convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ARM_DEN0028B_SMC_Calling_Convention.pdf
+.. _System Control and Management Interface (SCMI): SCMI_
+.. _SCMI: http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
+.. _Software Delegated Exception Interface (SDEI): SDEI_
+.. _SDEI: http://infocenter.arm.com/help/topic/com.arm.doc.den0054a/ARM_DEN0054A_Software_Delegated_Exception_Interface.pdf
+.. _Juno Arm Development Platform: http://www.arm.com/products/tools/development-boards/versatile-express/juno-arm-development-platform.php
+.. _Arm FVP website: FVP_
+.. _FVP: https://developer.arm.com/products/system-design/fixed-virtual-platforms
+.. _Linaro Release 18.04: https://community.arm.com/dev-platforms/b/documents/posts/linaro-release-notes-deprecated#LinaroRelease18.04
+.. _OP-TEE Secure OS: https://github.com/OP-TEE/optee_os
+.. _NVIDIA Trusted Little Kernel: http://nv-tegra.nvidia.com/gitweb/?p=3rdparty/ote_partner/tlk.git;a=summary
+.. _Trusty Secure OS: https://source.android.com/security/trusty
+.. _trustedfirmware.org: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
+.. _issue tracker: https://developer.trustedfirmware.org/project/board/1/
+.. _Security Center: ./docs/security-center.rst
+.. _license: ./license.rst
+.. _Contributing Guidelines: ./contributing.rst
+.. _Acknowledgments: ./acknowledgements.rst
+.. _Firmware Design: ./docs/firmware-design.rst
+.. _Change Log: ./docs/change-log.rst
+.. _User Guide: ./docs/user-guide.rst
+.. _Porting Guide: ./docs/porting-guide.rst
+.. _FreeBSD: http://www.freebsd.org
+.. _SCC: http://www.simple-cc.org/
+.. _Security Advisory TFV-1: ./docs/security_advisories/security-advisory-tfv-1.rst
+.. _Security Advisory TFV-2: ./docs/security_advisories/security-advisory-tfv-2.rst
+.. _Security Advisory TFV-3: ./docs/security_advisories/security-advisory-tfv-3.rst
+.. _Security Advisory TFV-4: ./docs/security_advisories/security-advisory-tfv-4.rst
+.. _Security Advisory TFV-5: ./docs/security_advisories/security-advisory-tfv-5.rst
+.. _Security Advisory TFV-6: ./docs/security_advisories/security-advisory-tfv-6.rst
+.. _Security Advisory TFV-7: ./docs/security_advisories/security-advisory-tfv-7.rst
+.. _Security Advisory TFV-8: ./docs/security_advisories/security-advisory-tfv-8.rst
+.. _Trusted Firmware-A Documentation Contents: ./docs/contents.rst