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How to find coresight components on cortex-a55?

HChen

Hi,

  I have a cortex-a55 chip running Linux, and I want to add software drivers for coresight. But some problems were encountered:

  1. Does it means that there are no coresight support when ID_AA64DFR0_EL1.TraceVer == 0 and MDRAR_EL1 == 0x0 ? ?
  2. Is there a switch or something so that I could enable coresight and do furthur work?
  3. Is there another way for me to find coresight components such as funnel and replicator by not using ROM table?

  I tried Arm DS IDE to connect my board using J-Link, and Coresight_access examples to get such register results.