Data processing apparatus for generating response to unresponsive processing circuitry, and method thereof

Abstract

The invention provides a data processing apparatus for generating response to unresponsive processing circuitry, and a method thereof. The data processing apparatus comprises: first processing circuitry; interrupt generating circuitry configured to generate an outgoing interrupt in response to said first processing circuitry becoming unresponsive; and interrupt receiving circuitry configured to receive an incoming interrupt, which indicates that second processing circuitry has become unresponsive, and in response to receiving said incoming interrupt, to cause said data processing apparatus toaccess data managed by said second processing circuitry.

Description

technical field [0001] This disclosure relates to data processing. In particular, the present disclosure relates to responding to unresponsive processing circuits. Background technique [0002] In data processing equipment, processing circuitry may become unresponsive. For example, a watchdog timer may be configured such that if the timer fires, the processing circuit is considered non-responsive. Meanwhile, the processing circuit may be configured to reset the watchdog timer every certain period of time which is less than the expiration time of the watchdog timer. In other words, if the processing circuit becomes unable to reset the timer, the timer will start, at which point it can be inferred that the processing circuit is unresponsive. The start of the timer may cause an interrupt which may be routed to cause the processing circuitry to be reset. In this case, it is desirable to determine why the processing circuit has become unresponsive. One way of achieving this ...

AI Technical Summary

Problems solved by technology

Of course, once the processing circuit has become unresponsive, it may be too late to start recording processing transactions, because the event that made the processor circuit unresponsive has already occurred

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