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Altera_Forum's avatar
Altera_Forum
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11 years ago

TrustZone prevents access to CoreSight

To change any of the CoreSight memory mapped registers, I have to use the DAP debug bus. For example: mem set APB:0x80007000 0 1 will enable the FPGA-CTI. I can see the change from H...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Did you unlock the coresight components (in your case, FPGA-CTI) before trying to access it through the core?

The lock register is at 0x80007fb0 and the value to be written is 0xc5acce55. You can either do this through DAP or through your core (0xff007fb0) before

trying to do any mem write to coresight.