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171 lines
7.2 KiB
Markdown
171 lines
7.2 KiB
Markdown
ARM Trusted Firmware - version 1.2
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==================================
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ARM Trusted Firmware provides a reference implementation of secure world
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software for [ARMv8-A], including a [Secure Monitor] [TEE-SMC] executing at
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Exception Level 3 (EL3). It implements various ARM interface standards, such as
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the Power State Coordination Interface ([PSCI]), Trusted Board Boot Requirements
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(TBBR, ARM DEN0006C-1) and [SMC Calling Convention][SMCCC]. As far as possible
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the code is designed for reuse or porting to other ARMv8-A model and hardware
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platforms.
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ARM will continue development in collaboration with interested parties to
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provide a full reference implementation of PSCI, TBBR and Secure Monitor code
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to the benefit of all developers working with ARMv8-A TrustZone technology.
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License
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-------
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The software is provided under a BSD 3-Clause [license]. Certain source files
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are derived from FreeBSD code: the original license is included in these
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source files.
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This Release
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------------
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This release provides a suitable starting point for productization of secure
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world boot and runtime firmware. Future versions will contain new features,
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optimizations and quality improvements.
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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 ARM Trusted Firmware.
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### Functionality
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* Initialization of the secure world (for example, exception vectors, control
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registers, interrupt controller and interrupts for the platform), before
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transitioning into the normal world at the Exception Level and Register
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Width specified by the platform.
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* Library support for CPU specific reset and power down sequences. This
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includes support for errata workarounds.
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* Drivers for both the version 2.0 and version 3.0 ARM Generic Interrupt
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Controller specifications (GICv2 and GICv3). The latter also enables GICv3
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hardware systems that do not contain legacy GICv2 support.
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* Drivers to enable standard initialization of ARM System IP, for example
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Cache Coherent Interconnect (CCI), Cache Coherent Network (CCN), Network
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Interconnect (NIC) and TrustZone Controller (TZC).
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* SMC (Secure Monitor Call) handling, conforming to the [SMC Calling
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Convention][SMCCC] using an EL3 runtime services framework.
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* SMC handling relating to [PSCI] for the Secondary CPU Boot, CPU Hotplug,
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CPU Idle and System Shutdown/Reset/Suspend use-cases.
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* Secure Monitor library code such as world switching, EL1 context management
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and interrupt routing. This must be integrated with a Secure-EL1 Payload
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Dispatcher (SPD) component to customize the interaction with a Secure-EL1
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Payload (SP), for example a Secure OS.
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* A Test Secure-EL1 Payload and Dispatcher to demonstrate Secure Monitor
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functionality and Secure-EL1 interaction with PSCI.
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* SPDs for the [OP-TEE Secure OS] and [NVidia Trusted Little Kernel]
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[NVidia TLK].
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* A Trusted Board Boot implementation, conforming to all mandatory TBBR
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requirements. This includes image authentication using certificates, a
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Firmware Update (or recovery mode) boot flow, and packaging of the various
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firmware images into a Firmware Image Package (FIP) to be loaded from
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non-volatile storage.
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* Support for alternative boot flows. Some platforms have their own boot
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firmware and only require the ARM Trusted Firmware Secure Monitor
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functionality. Other platforms require minimal initialization before
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booting into an arbitrary EL3 payload.
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For a full description of functionality and implementation details, please
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see the [Firmware Design] and supporting documentation. The [Change Log]
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provides details of changes made since the last release.
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### Platforms
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This release of the Trusted Firmware has been tested on variants r0 and r1 of
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the [Juno ARM Development Platform] [Juno] with [Linaro Release 15.10]
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[Linaro Release Notes].
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The Trusted Firmware has also been tested on the 64-bit Linux versions of the
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following ARM [FVP]s:
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* `Foundation_Platform` (Version 9.4, Build 9.4.59)
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* `FVP_Base_AEMv8A-AEMv8A` (Version 7.0, Build 0.8.7004)
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* `FVP_Base_Cortex-A57x4-A53x4` (Version 7.0, Build 0.8.7004)
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* `FVP_Base_Cortex-A57x1-A53x1` (Version 7.0, Build 0.8.7004)
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* `FVP_Base_Cortex-A57x2-A53x4` (Version 7.0, Build 0.8.7004)
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The Foundation FVP can be downloaded free of charge. The Base FVPs can be
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licensed from ARM: see [www.arm.com/fvp] [FVP].
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This release also contains the following platform support:
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* NVidia T210 and T132 SoCs
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* MediaTek MT8173 SoC
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### Still to Come
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* Complete implementation of the [PSCI] v1.0 specification.
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* Support for new CPUs and System IP.
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* More platform support.
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* Optimization and quality improvements.
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For a full list of detailed issues in the current code, please see the [Change
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Log] and the [GitHub issue tracker].
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Getting Started
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---------------
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Get the Trusted Firmware source code from
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[GitHub](https://www.github.com/ARM-software/arm-trusted-firmware).
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See the [User Guide] for instructions on how to install, build and use
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the Trusted Firmware with the ARM [FVP]s.
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See the [Firmware Design] for information on how the ARM Trusted Firmware works.
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See the [Porting Guide] as well for information about how to use this
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software on another ARMv8-A platform.
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See the [Contributing Guidelines] for information on how to contribute to this
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project and the [Acknowledgments] file for a list of contributors to the
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project.
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### Feedback and support
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ARM welcomes any feedback on the Trusted Firmware. Please send feedback using
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the [GitHub issue tracker].
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ARM licensees may contact ARM directly via their partner managers.
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- - - - - - - - - - - - - - - - - - - - - - - - - -
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_Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved._
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[License]: ./license.md "BSD license for ARM Trusted Firmware"
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[Contributing Guidelines]: ./contributing.md "Guidelines for contributors"
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[Acknowledgments]: ./acknowledgements.md "Contributor acknowledgments"
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[Change Log]: ./docs/change-log.md
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[User Guide]: ./docs/user-guide.md
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[Firmware Design]: ./docs/firmware-design.md
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[Porting Guide]: ./docs/porting-guide.md
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[ARMv8-A]: http://www.arm.com/products/processors/armv8-architecture.php "ARMv8-A Architecture"
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[FVP]: http://www.arm.com/fvp "ARM's Fixed Virtual Platforms"
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[Juno]: http://www.arm.com/products/tools/development-boards/versatile-express/juno-arm-development-platform.php "Juno ARM Development Platform"
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[PSCI]: http://infocenter.arm.com/help/topic/com.arm.doc.den0022c/DEN0022C_Power_State_Coordination_Interface.pdf "Power State Coordination Interface PDD (ARM DEN 0022C)"
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[SMCCC]: http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html "SMC Calling Convention PDD (ARM DEN 0028A)"
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[TEE-SMC]: http://www.arm.com/products/processors/technologies/trustzone/tee-smc.php "Secure Monitor and TEEs"
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[GitHub issue tracker]: https://github.com/ARM-software/tf-issues/issues
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[OP-TEE Secure OS]: https://github.com/OP-TEE/optee_os
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[NVidia TLK]: http://nv-tegra.nvidia.com/gitweb/?p=3rdparty/ote_partner/tlk.git;a=summary
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[Linaro Release Notes]: https://community.arm.com/docs/DOC-10952#jive_content_id_Linaro_Release_1510
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