0b3d4273fa
Write char if fifo is empty. If this is done like this all chars are printed. Because origin code just put that chars to fifo and in case of reset messages were missing. Before this change chars are put to fifo and only check before adding if fifo is full. The patch is changing this logic that it is adding char only when fifo is empty to make sure that in case of reset (by another SW for example) all chars are printed. Maybe one char can be missed but for IP itself it is much easier to send just one char compare to full fifo. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Change-Id: Ic24c2c1252bce24be2aed68ee29477ca4a549e5f |
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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.