1ARM Trusted Firmware - version 0.2 2================================== 3 4New features 5------------ 6 7* First source release. 8 9* Code for the PSCI suspend feature is supplied, although this is not enabled 10 by default since there are known issues (see below). 11 12 13Issues resolved since last release 14---------------------------------- 15 16* The "psci" nodes in the FDTs provided in this release now fully comply 17 with the recommendations made in the PSCI specification. 18 19 20Known issues 21------------ 22 23The following is a list of issues which are expected to be fixed in the future 24releases of the ARM Trusted Firmware. 25 26* The TrustZone Address Space Controller (TZC-400) is not being programmed 27 yet. Use of model parameter `-C bp.secure_memory=1` is not supported. 28 29* No support yet for secure world interrupt handling or for switching context 30 between secure and normal worlds in EL3. 31 32* GICv3 support is experimental. The Linux kernel patches to support this are 33 not widely available. There are known issues with GICv3 initialization in 34 the ARM Trusted Firmware. 35 36* Dynamic image loading is not available yet. The current image loader 37 implementation (used to load BL2 and all subsequent images) has some 38 limitations. Changing BL2 or BL3-1 load addresses in certain ways can lead 39 to loading errors, even if the images should theoretically fit in memory. 40 41* Although support for PSCI `CPU_SUSPEND` is present, it is not yet stable 42 and ready for use. 43 44* PSCI api calls `AFFINITY_INFO` & `PSCI_VERSION` are implemented but have not 45 been tested. 46 47* The ARM Trusted Firmware make files result in all build artifacts being 48 placed in the root of the project. These should be placed in appropriate 49 sub-directories. 50 51* The compilation of ARM Trusted Firmware is not free from compilation 52 warnings. Some of these warnings have not been investigated yet so they 53 could mask real bugs. 54 55* The ARM Trusted Firmware currently uses toolchain/system include files like 56 stdio.h. It should provide versions of these within the project to maintain 57 compatibility between toolchains/systems. 58 59* The PSCI code takes some locks in an incorrect sequence. This may cause 60 problems with suspend and hotplug in certain conditions. 61 62* The Linux kernel used in this release is based on version 3.12-rc4. Using 63 this kernel with the ARM Trusted Firmware fails to start the file-system as 64 a RAM-disk. It fails to execute user-space `init` from the RAM-disk. As an 65 alternative, the VirtioBlock mechanism can be used to provide a file-system 66 to the kernel. 67 68 69Detailed changes since last release 70----------------------------------- 71 72First source release – not applicable. 73 74- - - - - - - - - - - - - - - - - - - - - - - - - - 75 76_Copyright (c) 2013 ARM Ltd. All rights reserved._ 77