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arm-trusted-firmware / docs / change-log.md
@Achin Gupta Achin Gupta on 25 Oct 2013 2 KB ARMv8 Trusted Firmware release v0.2
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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.

Copyright (c) 2013 ARM Ltd. All rights reserved.