9e7d66314a
The pre-processor directives make it hard to read the non-TBB version of this function. Refactor the code to improve readability. No functional change introduced. In particular, introduce a new helper function load_image_flush(), that simply loads an image and flushes it out to main memory. This is the only thing load_auth_image_internal() needs to do when TBB is disabled or when authentication is dynamically disabled. In other cases, we need to recursively authenticate the parent images up to the root of trust. To make this clearer, this code gets moved to a TBB-specific helper function called load_auth_image_recursive(). As a result, load_auth_image_internal() now boils down to calling the right helper function (depending on TBB enablement and dynamic authentication status). Change-Id: I20a39a3b833810b97ecf4219358e7d2cac263890 Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com> |
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| drivers | ||
| fdts | ||
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| lib | ||
| make_helpers | ||
| plat | ||
| services | ||
| tools | ||
| .checkpatch.conf | ||
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| Makefile | ||
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| license.rst | ||
| readme.rst | ||
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.