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Can one ARM core debug another one in an MP/bigLITTE system?

Axel Heider

Hi,

I'm wondering, if one core could debug another one on the same or another cluster in an MP/BigLitte system ?

  • start/stop execution
  • read/write core registers
  • modify watch/breakapoints
  • full CP15 access

The use case would be a kernel debugger and the debug app running on a core, and the app to be debugged running on another core/cluster (or group of cores) exclusively reserved for debugging this app.

Does the CP14 debug interface support such a scenario?

Can a core use the functions that an external JTAG device uses?

Axel

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