Code complexity is a good indication of maintainability versus testability of a piece of software. ISO26262 introduces the following thresholds: complexity < 10 is accepted 10 <= complexity < 20 has to be justified complexity >= 20 cannot be accepted Rationale is that number of test cases to fully test a piece of software can (depending on the coverage metrics) grow exponentially with the number of branches in the software. This patch removes redundant conditionals from 'ipc_send_req_atomic' handler to reduce the McCabe Cyclomatic Complexity for this function Change-Id: I20fef79a771301e1c824aea72a45ff83f97591d5 Signed-off-by: Varun Wadekar <vwadekar@nvidia.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.