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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_Copyright (c) 2013 ARM Ltd. All rights reserved._