6138ffbc12
The motivation behind this patch and following patches is to extract information about the platform in runtime rather than depending on compile time macros such as FVP_CLUSTER_COUNT. This partially enables us to use a single binary for a family of platforms which all have similar hardware capabilities but differ in configurations. we populate the data structure describing the power domain hierarchy of the platform dynamically by querying the number of clusters and cpus using fconf getter APIs. Compile time macro such as FVP_CLUSTER_COUNT is still needed as it determines the size of related data structures. Note that the cpu-map node in HW_CONFIG dts represents a logical hierarchy of power domains of CPU. However, in reality, the power domains may not have been physically built in such hierarchy. Change-Id: Ibcbb5ca7b2c969f8ad03ab2eab289725245af7a9 Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com> |
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readme.rst
Trusted Firmware-A
Trusted Firmware-A (TF-A) is a reference implementation of secure world software for Arm A-Profile architectures (Armv8-A and Armv7-A), including an Exception Level 3 (EL3) Secure Monitor. It provides a suitable starting point for productization of secure world boot and runtime firmware, in either the AArch32 or AArch64 execution states.
TF-A implements Arm interface standards, including:
- Power State Coordination Interface (PSCI)
- Trusted Board Boot Requirements CLIENT (TBBR-CLIENT)
- SMC Calling Convention
- System Control and Management Interface (SCMI)
- Software Delegated Exception Interface (SDEI)
The code is designed to be portable and reusable across hardware platforms and software models that are based on the Armv8-A and Armv7-A architectures.
In collaboration with interested parties, we will continue to enhance TF-A with reference implementations of Arm standards to benefit developers working with Armv7-A and Armv8-A TrustZone technology.
Users are encouraged to do their own security validation, including penetration testing, on any secure world code derived from TF-A.
More Info and Documentation
To find out more about Trusted Firmware-A, please view the full documentation that is available through trustedfirmware.org.
Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.