4d585fe52f
For platforms where we don't know the number of cores at compile time, the size of the GIC redistributor frame is then also undetermined, since it depends on this number of cores. On top of this the GICR base address can also change, when an unknown number of ITS frames (including zero) take up space between the distributor and redistributor. So while those two adjustments are done for independent reasons, the code for doing so is very similar, so we should utilise the existing fdt_adjust_gic_redist() function. Add an (optional) gicr_base parameters to the prototype, so callers can choose to also adjust this base address later, if needed. Change-Id: Id39c0ba83e7401fdff1944e86950bb7121f210e8 Signed-off-by: Andre Przywara <andre.przywara@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.