Trigger on load/store data

[Gregoriy Bereznyakov]

Hello!

Does anyone know if Trigger Module is implemented to work with data being load or store?

Best regards,
Gregoriy

[Ernie Edgar]

Load and store triggers with data value are covered in the Debug spec, but support for it is optional in an implemenation.  You would use trigger type 2, then set mcontrol.select to 1 to perform a match on the data value loaded or stored, and set either or both mcontrol.load and mcontrol.store.  The data value to compare goes in tdata2.

Ernie

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[Gregoriy Bereznyakov]

Thank you!

But is there any existing implementation, especially for Rocket-chip?
Or is it described in Debug Spec but not implemented (and implementantion is left to the hardware engineer)?

Gregoriy

[Ernie Edgar]

No, rocket-chip does not implement this option.

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[Gregoriy Bereznyakov]

Ok, thank you!

But what about other cores? Does anyone of them implement it?