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ETM Timestamps always 0x0 on Juno R2 board

ZHANGYming

Hi,

I'm a beginner to use ETM and try to use etm on arm juno board with the newest Linaro repo and Linux OE. The coresight driver sysFS work well and can get the etm trace data, but when I enable timestamp its value always 0x0. I noticed some discussion about the Global Timestamp Generator block, I think maybe the timestamps generator is not enabled. But I don't know Timestamp Generator register's physical address on Juno. Should I do something else to turn on timestamp on Juno?

 

Thanks so much for  help and time.

 

Best regards,

Yiming