Look up the power_dropout fn in openocd. Interfaces can implement
support for detecting and reporting power dropouts.

If the interface has the capability of reading the power at a moment
in time(polling), then this is somewhat less useful as OpenOCD can not
spend all it's time polling the power status to detect dropouts.

Ditto for srst_asserted interface fn.

The OpenOCD model is currently just to report this as a LOG_USER() and
not do anything else clever about it. To do anything clever upon these
events would require the error propagation handling in OpenOCD to be
seriously robust, which it wasn't and it is not quite there yet I think.

-- 
Øyvind Harboe
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