I am using a Cyclone V SoC with Cortex-A9 MPCore.
The ARM Architecture TRM and Cortex-A9 TRM say that an external security controller drives the debug authentication signals, such as DBGEN and SPIDEN.
I found no information whatsoever on how to drive these signals.
Are these even publicly documented? How can I access and set these debug authentication signals?
These registers and signals in CortexA9 core.
Usually we refer user to the ARM documentation.