[Libre-soc-bugs] [Bug 499] Create experimental gdb protocol implementation in nmigen for debugging

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=499

Staf Verhaegen <staf at fibraservi.eu> changed:

           What    |Removed                     |Added
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                 CC|                            |staf at fibraservi.eu

--- Comment #7 from Staf Verhaegen <staf at fibraservi.eu> ---
I think you guys are mixing up layers. JTAG is a communication interface not a
protocol. A debugging protocol is something you can add on top. Like you add
TCP/IP on top of ethernet where thus JTAG corresponds with ethernet and the
debug protocol with TCP/IP.

AFAIK ARM defines a standard set of JTAG instructions and if a CPU implements
these one can use OpenOCD to setup a debug server for debugging the ARM CPU
remotely using gdb.

So to me the question is if a similar set of debugging JTAG instructions exists
for Power and if OpenOCD or another program has support for this.

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