readme.rst - imx-atf - Git at Google

 ARM Trusted Firmware - version 1.4
 ==================================

 ARM Trusted Firmware provides a reference implementation of secure world
 software for `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 (TBBR, ARM DEN0006C-1)
 -  `SMC Calling Convention`_
 -  `System Control and Management Interface`_

 As far as possible the code is designed for reuse or porting to other ARMv8-A
 model and hardware platforms.

 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 ARMv8-A TrustZone technology.

 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 stdlib source code is derived from FreeBSD code.

 -  The libfdt source code is dual licensed. It is used by this project under
    the terms of the BSD-2-Clause license.

 -  The LLVM compiler-rt source code is dual licensed. It is used by this
    project under the terms of the University of Illinois "BSD-Like" license.

 This Release
 ------------

 This release provides a suitable starting point for productization of secure
 world boot and runtime firmware, in either the AArch32 or AArch64 execution
 state.

 Users are encouraged to do their own security validation, including penetration
 testing, on any secure world code derived from ARM Trusted Firmware.

 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 dispatcher component
    (SPD) to customize the interaction with the SP.

 -  A Test SP/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 TrustZone CryptoCell product, to take
    advantage of its hardware Root of Trust and crypto acceleration services.

 -  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.

 -  Support for the GCC, LLVM and ARM Compiler 6 toolchains.

 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 has been tested on variants
 r0, r1 and r2 of the `Juno ARM Development Platform`_.

 Various AArch64 builds of this release have been tested on the following ARM
 `FVP`_\ s (64-bit host machine only):

 NOTE: Unless otherwise stated, the FVP Version is 11.0, Build 11.0.34.

 -  ``Foundation_Platform``
 -  ``FVP_Base_AEMv8A-AEMv8A`` (Version 8.5, Build 0.8.8502)
 -  ``FVP_Base_Cortex-A35x4``
 -  ``FVP_Base_Cortex-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_CSS_SGM-775`` (Version 11.0, Build 11.0.36)

 Various AArch32 builds of this release has been tested on the following ARM
 `FVP`_\ s (64-bit host machine only):

 -  ``FVP_Base_AEMv8A-AEMv8A`` (Version 8.5, Build 0.8.8502)
 -  ``FVP_Base_Cortex-A32x4``

 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 17.04`_.

 This release also contains the following platform support:

 -  HiKey and HiKey960 boards
 -  MediaTek MT6795 and MT8173 SoCs
 -  NVidia T132, T186 and T210 SoCs
 -  QEMU emulator
 -  RockChip RK3328, RK3368 and RK3399 SoCs
 -  Socionext UniPhier SoC family
 -  Xilinx Zynq UltraScale + MPSoC

 Still to Come
 ~~~~~~~~~~~~~

 -  More platform support.

 -  Ongoing support for new architectural features, CPUs and System IP.

 -  Ongoing support for new `PSCI`_, `SCMI`_ and TBBR features.

 -  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 `GitHub issue tracker`_.

 Getting Started
 ---------------

 Get the Trusted Firmware source code from `GitHub`_.

 See the `User Guide`_ for instructions on how to install, build and use
 the Trusted Firmware with the ARM `FVP`_\ s.

 See the `Firmware Design`_ for information on how the Trusted Firmware works.

 See the `Porting Guide`_ as well for information about how to use this
 software on another 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.

 Feedback and support
 ~~~~~~~~~~~~~~~~~~~~

 ARM welcomes any feedback on Trusted Firmware. If you think you have found a
 security vulnerability, please report this using the process defined in the
 Trusted Firmware `Security Centre`_. For all other feedback, please use the
 `GitHub issue tracker`_.

 ARM licensees may contact ARM directly via their partner managers.

 --------------

 *Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.*

 .. _ARMv8-A: http://www.arm.com/products/processors/armv8-architecture.php
 .. _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
 .. _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: http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_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 17.04: https://community.arm.com/dev-platforms/b/documents/posts/linaro-release-notes-deprecated#LinaroRelease17.04
 .. _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
 .. _GitHub: https://www.github.com/ARM-software/arm-trusted-firmware
 .. _GitHub issue tracker: https://github.com/ARM-software/tf-issues/issues
 .. _Security Centre: https://github.com/ARM-software/arm-trusted-firmware/wiki/ARM-Trusted-Firmware-Security-Centre
 .. _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
	ARM Trusted Firmware - version 1.4
	==================================

	ARM Trusted Firmware provides a reference implementation of secure world
	software for `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 (TBBR, ARM DEN0006C-1)
	- `SMC Calling Convention`_
	- `System Control and Management Interface`_

	As far as possible the code is designed for reuse or porting to other ARMv8-A
	model and hardware platforms.

	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 ARMv8-A TrustZone technology.

	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 stdlib source code is derived from FreeBSD code.

	- The libfdt source code is dual licensed. It is used by this project under
	the terms of the BSD-2-Clause license.

	- The LLVM compiler-rt source code is dual licensed. It is used by this
	project under the terms of the University of Illinois "BSD-Like" license.

	This Release
	------------

	This release provides a suitable starting point for productization of secure
	world boot and runtime firmware, in either the AArch32 or AArch64 execution
	state.

	Users are encouraged to do their own security validation, including penetration
	testing, on any secure world code derived from ARM Trusted Firmware.

	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 dispatcher component
	(SPD) to customize the interaction with the SP.

	- A Test SP/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 TrustZone CryptoCell product, to take
	advantage of its hardware Root of Trust and crypto acceleration services.

	- 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.

	- Support for the GCC, LLVM and ARM Compiler 6 toolchains.

	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 has been tested on variants
	r0, r1 and r2 of the `Juno ARM Development Platform`_.

	Various AArch64 builds of this release have been tested on the following ARM
	`FVP`_\ s (64-bit host machine only):

	NOTE: Unless otherwise stated, the FVP Version is 11.0, Build 11.0.34.

	- ``Foundation_Platform``
	- ``FVP_Base_AEMv8A-AEMv8A`` (Version 8.5, Build 0.8.8502)
	- ``FVP_Base_Cortex-A35x4``
	- ``FVP_Base_Cortex-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_CSS_SGM-775`` (Version 11.0, Build 11.0.36)

	Various AArch32 builds of this release has been tested on the following ARM
	`FVP`_\ s (64-bit host machine only):

	- ``FVP_Base_AEMv8A-AEMv8A`` (Version 8.5, Build 0.8.8502)
	- ``FVP_Base_Cortex-A32x4``

	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 17.04`_.

	This release also contains the following platform support:

	- HiKey and HiKey960 boards
	- MediaTek MT6795 and MT8173 SoCs
	- NVidia T132, T186 and T210 SoCs
	- QEMU emulator
	- RockChip RK3328, RK3368 and RK3399 SoCs
	- Socionext UniPhier SoC family
	- Xilinx Zynq UltraScale + MPSoC

	Still to Come
	~~~~~~~~~~~~~

	- More platform support.

	- Ongoing support for new architectural features, CPUs and System IP.

	- Ongoing support for new `PSCI`_, `SCMI`_ and TBBR features.

	- 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 `GitHub issue tracker`_.

	Getting Started
	---------------

	Get the Trusted Firmware source code from `GitHub`_.

	See the `User Guide`_ for instructions on how to install, build and use
	the Trusted Firmware with the ARM `FVP`_\ s.

	See the `Firmware Design`_ for information on how the Trusted Firmware works.

	See the `Porting Guide`_ as well for information about how to use this
	software on another 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.

	Feedback and support
	~~~~~~~~~~~~~~~~~~~~

	ARM welcomes any feedback on Trusted Firmware. If you think you have found a
	security vulnerability, please report this using the process defined in the
	Trusted Firmware `Security Centre`_. For all other feedback, please use the
	`GitHub issue tracker`_.

	ARM licensees may contact ARM directly via their partner managers.

	--------------

	Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.

	.. _ARMv8-A: http://www.arm.com/products/processors/armv8-architecture.php
	.. _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
	.. _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: http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_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 17.04: https://community.arm.com/dev-platforms/b/documents/posts/linaro-release-notes-deprecated#LinaroRelease17.04
	.. _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
	.. _GitHub: https://www.github.com/ARM-software/arm-trusted-firmware
	.. _GitHub issue tracker: https://github.com/ARM-software/tf-issues/issues
	.. _Security Centre: https://github.com/ARM-software/arm-trusted-firmware/wiki/ARM-Trusted-Firmware-Security-Centre
	.. _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