RE: nRF5340 trust zone and cache

victor zheng — Mon, 26 Jul 2021 13:14:09 GMT

Simon

Because the cache only be used by secure code, the execute speed is different between secure and non secure code by the influence by cache, right? Thank you.

Regards

Victor

RE: nRF5340 trust zone and cache

Simon — Mon, 26 Jul 2021 09:48:11 GMT

[quote user=""]Does cache only be used by secure code?[/quote]

Yes, correct.The CACHE peripheral can only be accessed from secure code, since it's mapped as secure (S).

Read these for more information:

Peripheral access control

Memory map

1.6 Secure vs. nonsecure

[quote user=""]if the answer is no, no matter cache was config as secure or non secure, only the code in same zone can use it. right?[/quote]

Answer was yes

[quote user=""]if cache only be used by one secure state code, the execute speed will be different in different secure area?[/quote]

Does this question still apply, since the answer to the first question was yes?

Best regards,

Simon