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@ -1,17 +1,13 @@
ARM Trusted Firmware - version 1.1
ARM Trusted Firmware - version 1.2
==================================
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.
software for [ARMv8-A], including a [Secure Monitor] [TEE-SMC] 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) and [SMC Calling Convention][SMCCC]. 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
@ -29,51 +25,58 @@ 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.
This release provides a suitable starting point for productization of secure
world boot and runtime firmware. Future versions will contain new features,
optimizations and quality improvements.
Users are encouraged to do their own security validation, including penetration
testing, on any secure world code derived from ARM Trusted Firmware.
### 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.
* Initialization of the secure world (for example, exception vectors, control
registers, interrupt controller and interrupts for the platform), before
transitioning into the normal world at the Exception Level and Register
Width specified by the platform.
* Initializes the secure world (for example, exception vectors, control
registers, GIC and interrupts for the platform), before transitioning into
the normal world.
* Library support for CPU specific reset and power down sequences. This
includes support for errata workarounds.
* Supports both GICv2 and GICv3 initialization for use by normal world
software.
* Drivers for both the version 2.0 and version 3.0 ARM Generic Interrupt
Controller specifications (GICv2 and GICv3). The latter also enables GICv3
hardware systems that do not contain legacy GICv2 support.
* Starts the normal world at the Exception Level and Register Width specified
by the platform port. Typically this is AArch64 EL2 if available.
* Drivers to enable standard initialization of ARM System IP, for example
Cache Coherent Interconnect (CCI), Cache Coherent Network (CCN), Network
Interconnect (NIC) and TrustZone Controller (TZC).
* Handles SMCs (Secure Monitor Calls) conforming to the [SMC Calling
Convention PDD] [SMCCC] using an EL3 runtime services framework.
* SMC (Secure Monitor Call) handling, conforming to the [SMC Calling
Convention][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.
* SMC handling relating to [PSCI] for the Secondary CPU Boot, CPU Hotplug,
CPU Idle and System Shutdown/Reset/Suspend use-cases.
* Secure Monitor library code such as world switching, EL1 context management
and interrupt routing. This must be integrated with a Secure-EL1 Payload
Dispatcher (SPD) component to customize the interaction with a Secure-EL1
Payload (SP), for example a Secure OS.
* 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.
functionality and Secure-EL1 interaction with PSCI.
* 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.
* SPDs for the [OP-TEE Secure OS] and [NVidia Trusted Little Kernel]
[NVidia TLK].
* Isolation of memory accessible by the secure world from the normal world
through programming of a TrustZone controller.
* A Trusted Board Boot implementation, conforming to all mandatory TBBR
requirements. This includes image authentication using certificates, a
Firmware Update (or recovery mode) boot flow, and packaging of the various
firmware images into a Firmware Image Package (FIP) to be loaded from
non-volatile storage.
* 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.
* Support for alternative boot flows. Some platforms have their own boot
firmware and only require the ARM Trusted Firmware Secure Monitor
functionality. Other platforms require minimal initialization before
booting into an arbitrary EL3 payload.
For a full description of functionality and implementation details, please
see the [Firmware Design] and supporting documentation. The [Change Log]
@ -81,33 +84,36 @@ 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].
This release of the Trusted Firmware has been tested on variants r0 and r1 of
the [Juno ARM Development Platform] [Juno] with [Linaro Release 15.10]
[Linaro Release Notes].
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)
* `Foundation_Platform` (Version 9.4, Build 9.4.59)
* `FVP_Base_AEMv8A-AEMv8A` (Version 7.0, Build 0.8.7004)
* `FVP_Base_Cortex-A57x4-A53x4` (Version 7.0, Build 0.8.7004)
* `FVP_Base_Cortex-A57x1-A53x1` (Version 7.0, Build 0.8.7004)
* `FVP_Base_Cortex-A57x2-A53x4` (Version 7.0, Build 0.8.7004)
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
This release also contains the following platform support:
* Complete and more flexible Trusted Board Boot implementation.
* NVidia T210 and T132 SoCs
* MediaTek MT8173 SoC
### Still to Come
* Complete implementation of the [PSCI] v1.0 specification.
* Support for alternative types of Secure-EL1 Payloads.
* Support for new CPUs and System IP.
* Extending the GICv3 support to the secure world.
* More platform support.
* Support for new System IP devices.
* 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].
@ -155,8 +161,10 @@ _Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved._
[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
[OP-TEE Secure OS]: https://github.com/OP-TEE/optee_os
[NVidia TLK]: http://nv-tegra.nvidia.com/gitweb/?p=3rdparty/ote_partner/tlk.git;a=summary
[Linaro Release Notes]: https://community.arm.com/docs/DOC-10952#jive_content_id_Linaro_Release_1510