ARM Trusted Firmware - version 1.1 ================================== ARM Trusted Firmware provides a reference implementation of secure world software for [ARMv8-A], including Exception Level 3 (EL3) software. This release provides complete support for version 0.2 of the [PSCI] specification, initial support for the new version 1.0 of that specification, and prototype support for the Trusted Board Boot Requirements specification. The intent is to provide a reference implementation of various ARM interface standards, such as the Power State Coordination Interface ([PSCI]), Trusted Board Boot Requirements (TBBR) and [Secure Monitor] [TEE-SMC] code. 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 PSCI, TBBR and Secure Monitor code to the benefit of all developers working with ARMv8-A TrustZone technology. License ------- The software is provided under a BSD 3-Clause [license]. Certain source files are derived from FreeBSD code: the original license is included in these source files. This Release ------------ This release is a limited functionality implementation of the Trusted Firmware. It provides a suitable starting point for productization. Future versions will contain new features, optimizations and quality improvements. ### Functionality * Prototype implementation of a subset of the Trusted Board Boot Requirements Platform Design Document (PDD). This includes packaging the various firmware images into a Firmware Image Package (FIP) to be loaded from non-volatile storage, and a prototype of authenticated boot using key certificates stored in the FIP. * Initializes the secure world (for example, exception vectors, control registers, GIC and interrupts for the platform), before transitioning into the normal world. * Supports both GICv2 and GICv3 initialization for use by normal world software. * Starts the normal world at the Exception Level and Register Width specified by the platform port. Typically this is AArch64 EL2 if available. * Handles SMCs (Secure Monitor Calls) conforming to the [SMC Calling Convention PDD] [SMCCC] using an EL3 runtime services framework. * Handles SMCs relating to the [Power State Coordination Interface PDD] [PSCI] for the Secondary CPU Boot, CPU Hotplug, CPU Idle and System Shutdown/Reset use-cases. * A Test Secure-EL1 Payload and Dispatcher to demonstrate Secure Monitor functionality such as world switching, EL1 context management and interrupt routing. This also demonstrates Secure-EL1 interaction with PSCI. Some of this functionality is provided in library form for re-use by other Secure-EL1 Payload Dispatchers. * Support for alternative Trusted Boot Firmware. Some platforms have their own Trusted Boot implementation and only require the Secure Monitor functionality provided by ARM Trusted Firmware. * Isolation of memory accessible by the secure world from the normal world through programming of a TrustZone controller. * Support for CPU specific reset sequences, power down sequences and register dumping during crash reporting. The CPU specific reset sequences include support for errata workarounds. 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 This release of the Trusted Firmware has been tested on Revision B of the [Juno ARM Development Platform] [Juno] with Version r0p0-00rel7 of the [ARM SCP Firmware] [SCP download]. The Trusted Firmware has also been tested on the 64-bit Linux versions of the following ARM [FVP]s: * `Foundation_Platform` (Version 9.1, Build 9.1.33) * `FVP_Base_AEMv8A-AEMv8A` (Version 6.2, Build 0.8.6202) * `FVP_Base_Cortex-A57x4-A53x4` (Version 6.2, Build 0.8.6202) * `FVP_Base_Cortex-A57x1-A53x1` (Version 6.2, Build 0.8.6202) * `FVP_Base_Cortex-A57x2-A53x4` (Version 6.2, Build 0.8.6202) The Foundation FVP can be downloaded free of charge. The Base FVPs can be licensed from ARM: see [www.arm.com/fvp] [FVP]. ### Still to Come * Complete and more flexible Trusted Board Boot implementation. * Complete implementation of the [PSCI] v1.0 specification. * Support for alternative types of Secure-EL1 Payloads. * Extending the GICv3 support to the secure world. * Support for new System IP devices. 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](https://www.github.com/ARM-software/arm-trusted-firmware). 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 ARM 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 the Trusted Firmware. Please send feedback using the [GitHub issue tracker]. ARM licensees may contact ARM directly via their partner managers. - - - - - - - - - - - - - - - - - - - - - - - - - - _Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved._ [License]: ./license.md "BSD license for ARM Trusted Firmware" [Contributing Guidelines]: ./contributing.md "Guidelines for contributors" [Acknowledgments]: ./acknowledgements.md "Contributor acknowledgments" [Change Log]: ./docs/change-log.md [User Guide]: ./docs/user-guide.md [Firmware Design]: ./docs/firmware-design.md [Porting Guide]: ./docs/porting-guide.md [ARMv8-A]: http://www.arm.com/products/processors/armv8-architecture.php "ARMv8-A Architecture" [FVP]: http://www.arm.com/fvp "ARM's Fixed Virtual Platforms" [Juno]: http://www.arm.com/products/tools/development-boards/versatile-express/juno-arm-development-platform.php "Juno ARM Development Platform" [SCP download]: https://silver.arm.com/download/download.tm?pv=1764630 [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)" [SMCCC]: http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html "SMC Calling Convention PDD (ARM DEN 0028A)" [TEE-SMC]: http://www.arm.com/products/processors/technologies/trustzone/tee-smc.php "Secure Monitor and TEEs" [GitHub issue tracker]: https://github.com/ARM-software/tf-issues/issues