7f2d23d9d7
Morello exhibits the behavior similar to Juno wherein CNTBaseN.CNTFRQ can be written but does not reflect the value of the CNTFRQ register in CNTCTLBase frame. This doesn't follow ARM ARM in that the value updated in CNTCTLBase.CNTFRQ is not reflected in CNTBaseN.CNTFRQ. Hence enable the workaround (applied to Juno) for Morello that updates the CNTFRQ register in the Non Secure CNTBaseN frame. Change-Id: Iabe53bf3c25152052107e08321323e4bde5fbef4 Signed-off-by: Manoj Kumar <manoj.kumar3@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.