ARM Trusted Firmware - version

Detailed changes since last release

  • Support for Foundation FVP v5.2 added. The documented UEFI configuration disables some devices that are unavailable in the Foundation FVP, including MMC and CLCD. The resultant UEFI binary can be used on the AEMv8 and Cortex-A57-A53 FVPs, as well as the Foundation FVP.

ARM Trusted Firmware - version 0.2

New features

  • First source release.

  • Code for the PSCI suspend feature is supplied, although this is not enabled by default since there are known issues (see below).

Issues resolved since last release

  • The "psci" nodes in the FDTs provided in this release now fully comply with the recommendations made in the PSCI specification.

Known issues

The following is a list of issues which are expected to be fixed in the future releases of the ARM Trusted Firmware.

  • The TrustZone Address Space Controller (TZC-400) is not being programmed yet. Use of model parameter -C bp.secure_memory=1 is not supported.

  • No support yet for secure world interrupt handling or for switching context between secure and normal worlds in EL3.

  • GICv3 support is experimental. The Linux kernel patches to support this are not widely available. There are known issues with GICv3 initialization in the ARM Trusted Firmware.

  • Dynamic image loading is not available yet. The current image loader implementation (used to load BL2 and all subsequent images) has some limitations. Changing BL2 or BL3-1 load addresses in certain ways can lead to loading errors, even if the images should theoretically fit in memory.

  • Although support for PSCI CPU_SUSPEND is present, it is not yet stable and ready for use.

  • PSCI api calls AFFINITY_INFO & PSCI_VERSION are implemented but have not been tested.

  • The ARM Trusted Firmware make files result in all build artifacts being placed in the root of the project. These should be placed in appropriate sub-directories.

  • The compilation of ARM Trusted Firmware is not free from compilation warnings. Some of these warnings have not been investigated yet so they could mask real bugs.

  • The ARM Trusted Firmware currently uses toolchain/system include files like stdio.h. It should provide versions of these within the project to maintain compatibility between toolchains/systems.

  • The PSCI code takes some locks in an incorrect sequence. This may cause problems with suspend and hotplug in certain conditions.

  • The Linux kernel used in this release is based on version 3.12-rc4. Using this kernel with the ARM Trusted Firmware fails to start the file-system as a RAM-disk. It fails to execute user-space init from the RAM-disk. As an alternative, the VirtioBlock mechanism can be used to provide a file-system to the kernel.

Detailed changes since last release

First source release – not applicable.

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