JTAG Alarm

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JTAG Alarm

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dwainer
Contributor I

Hi,

iMX8Mini processor.

I would like to receive some tips regarding the following message in Linux Kernel 5.70.72

[  990.996058] caam-snvs 30370000.caam-snvs: Unhandled Security Violation Interrupt 1 = JTAG Alarm
[  991.004832] caam-snvs 30370000.caam-snvs: Unhandled Security Violation Interrupt 0 = CAAM Internal Security Violation

It does not happen all the time.

Occurs while debugging Cortex M4 with J-Link. I have not blow the JTAG fusses, left them unchanged.

I would also like some documentation similar to the iMX6 document related to secure JTAG, as well as how to configure the secure key in J-Link.

Daniel.

 

 

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AldoG
NXP TechSupport
NXP TechSupport

Hello,

This alarm is part of the SNVS as you can see in the log, please refer to the security reference manual for more information.

Regarding documentation you may refer to the following:
https://www.nxp.com/webapp/Download?colCode=AN4686

Best regards,
Aldo.

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