c20c05252c
The SCU connects one to four Cortex-A5/Cortex-A9 processors to the memory system through the AXI interfaces. The SCU functions are to: - maintain data cache coherency between the Cortex-A5/Cortex-A9 processors - initiate L2 AXI memory accesses - arbitrate between Cortex-A5/Cortex-A9 processors requesting L2 accesses - manage ACP accesses. Snoop Control Unit will enable to snoop on other CPUs caches. This is very important when it comes to synchronizing data between CPUs. As an example, there is a high chance that data might be cache'd and other CPUs can't see the change. In such cases, if snoop control unit is enabled, data is synchoronized immediately between CPUs and the changes are visible to other CPUs. This driver provides functionality to enable SCU as well as enabling user to know the following - number of CPUs present - is a particular CPU operating in SMP mode or AMP mode - data cache size of a particular CPU - does SCU has ACP port - is L2CPRESENT Change-Id: I0d977970154fa60df57caf449200d471f02312a0 Signed-off-by: Vishnu Banavath <vishnu.banavath@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.