79d89e3da0
A GICv3 interrupt controller will be instantiated for a certain number of cores. This will result in the respective number of GICR frames. The last frame will have the "Last" bit set in its GICR_TYPER register. For platforms with a topology unknown at build time (the Arm FPGAs, for instance), we need to learn the number of used cores at runtime, to size the GICR region in the devicetree accordingly. Add a generic function that iterates over all GICR frames until it encounters one with the "Last" bit set. It returns the number of cores the GICv3 has been configured for. Change-Id: I79f033c50dfc1c275aba7122725868811abcc4f8 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.