1ARM Trusted Firmware 2==================== 3 4Detailed changes since last release 5----------------------------------- 6 7* Support for Foundation FVP Version 2.0 added. 8 The documented UEFI configuration disables some devices that are unavailable 9 in the Foundation FVP, including MMC and CLCD. The resultant UEFI binary can 10 be used on the AEMv8 and Cortex-A57-A53 FVPs, as well as the Foundation FVP. 11 NOTE: The software will not work on Version 1.0 of the Foundation FVP. 12 13* Regression-checked against latest Base FVPs (Version 5.2). 14 15* The supplied FDTs expose the Interrupt Translation Service (ITS) available 16 in GICv3. 17 18* Fixed various GCC compiler warnings. 19 20* Unmask SError and Debug exceptions in the trusted firmware. 21 Also route external abort and SError interrupts to EL3. 22 23* The amount of physical RAM available to Linux as specified in the FDTs for 24 Base FVPs have been increased from 2GB to 4GB. This resolves the issue of 25 failing to start user-space when using a RAM-disk file-system. 26 27* Build products are now created in a separate build directory tree. 28 29* Analyze at link-time whether bootloader images will fit in memory and won't 30 overlap each other at run time. If it is not the case then image linking 31 will now fail. 32 33* Reduce the size of the bootloader images by cutting some sections out of 34 their disk images and allocating them at load time, whenever possible. 35 36* Properly initialise the C runtime environment. C code can now safely assume 37 that global variables are initialised to 0 and that initialised data holds 38 the correct value. 39 40* General changes on the memory layout: some sections have been moved, some of 41 them have been merged together, and some alignment constraints on sections 42 have changed. 43 44* Enable third party contributions. Add a new contributing.md containing 45 instructions for how to contribute and update copyright text in all files to 46 acknowledge contributors. 47 48* The wake up enable bit in the FVP power controller is cleared when a cpu is 49 physically powered up to prevent a spurious wake up from a subsequent cpu 50 off state. 51 52ARM Trusted Firmware - version 0.2 53================================== 54 55New features 56------------ 57 58* First source release. 59 60* Code for the PSCI suspend feature is supplied, although this is not enabled 61 by default since there are known issues (see below). 62 63 64Issues resolved since last release 65---------------------------------- 66 67* The "psci" nodes in the FDTs provided in this release now fully comply 68 with the recommendations made in the PSCI specification. 69 70 71Known issues 72------------ 73 74The following is a list of issues which are expected to be fixed in the future 75releases of the ARM Trusted Firmware. 76 77* The TrustZone Address Space Controller (TZC-400) is not being programmed 78 yet. Use of model parameter `-C bp.secure_memory=1` is not supported. 79 80* No support yet for secure world interrupt handling or for switching context 81 between secure and normal worlds in EL3. 82 83* GICv3 support is experimental. The Linux kernel patches to support this are 84 not widely available. There are known issues with GICv3 initialization in 85 the ARM Trusted Firmware. 86 87* Dynamic image loading is not available yet. The current image loader 88 implementation (used to load BL2 and all subsequent images) has some 89 limitations. Changing BL2 or BL3-1 load addresses in certain ways can lead 90 to loading errors, even if the images should theoretically fit in memory. 91 92* Although support for PSCI `CPU_SUSPEND` is present, it is not yet stable 93 and ready for use. 94 95* PSCI API calls `AFFINITY_INFO` & `PSCI_VERSION` are implemented but have not 96 been tested. 97 98* The ARM Trusted Firmware make files result in all build artifacts being 99 placed in the root of the project. These should be placed in appropriate 100 sub-directories. 101 102* The compilation of ARM Trusted Firmware is not free from compilation 103 warnings. Some of these warnings have not been investigated yet so they 104 could mask real bugs. 105 106* The ARM Trusted Firmware currently uses toolchain/system include files like 107 stdio.h. It should provide versions of these within the project to maintain 108 compatibility between toolchains/systems. 109 110* The PSCI code takes some locks in an incorrect sequence. This may cause 111 problems with suspend and hotplug in certain conditions. 112 113* The Linux kernel used in this release is based on version 3.12-rc4. Using 114 this kernel with the ARM Trusted Firmware fails to start the file-system as 115 a RAM-disk. It fails to execute user-space `init` from the RAM-disk. As an 116 alternative, the VirtioBlock mechanism can be used to provide a file-system 117 to the kernel. 118 119 120Detailed changes since last release 121----------------------------------- 122 123First source release - not applicable. 124 125- - - - - - - - - - - - - - - - - - - - - - - - - - 126 127_Copyright (c) 2013, ARM Limited and Contributors. All rights reserved._ 128