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MCXN947: how assign CMC0 to secure privileged mode

The RM indicates it should be set to Secure and Privileged and that I can use the AHBSC register to do this.

The SRM says the AHBSC register does not affect the privilege status of the CMC0 register

So how do I examine/ change the security level if this register?

MCXNRe: MCXN947: how assign CMC0 to secure privileged mode

Hi @ClarkS 

There is a training session on how to configure TrustZone. Please refer to it here:
TrustZone configuration training

Learn how to create a secure/nonsecure application and debug on a secure Cortex M33 NXP device.

Thank you.

BR

Alice

Re: MCXN947: how assign CMC0 to secure privileged mode

Thank you for this, Alice. I didn’t know of this article. I’ll study it. 

Re: MCXN947: how assign CMC0 to secure privileged mode

Turns out this was just a collection of slides from an old presentation. I did not see any reference to the CMC peripheral. 

The slides did remind me to check the Config Tools app so I downloaded the most recent version. Inspection of the Tee tool did not find the CMC0 register at all. 

So how do I determine the security level of  this peripheral and especially the SRS and SSRS registers. 

Also the RM should probably be updated since the note in it to use the AHBSC register to configure its permissions appears to be incorrect.

Re: MCXN947: how assign CMC0 to secure privileged mode

Hello @ClarkS 

There is some confusion in the documentation. I have escalated it to  internall team and will share any updates with you. Thank you.

BR

Alice

Re: MCXN947: how assign CMC0 to secure privileged modeThank you, Alice. Looks like it defaults to SECURE / PRIVILEGED like I hoped it was.

I appreciate getting the SRM updated!Re: MCXN947: how assign CMC0 to secure privileged mode

Hi @ClarkS 

Thanks for your patience. 

CMC access permission is controlled by AHBSC AIPS_BRIDGE_GROUP0_MEM_RULE1[1:0]. This will be fixed in the next version of RM.

Thank you.

BR

Alice

Thank you.