Arm Limited

James Robert Hodgson

David Francis McHale

Man Cheung Joseph Yiu

An interrupt controller and interrupt controlling method are provided for prioritizing interrupt requests generated by a plurality of interrupt sources. The interrupt controller comprises an interrupt source interface operable to receive interrupt requests generated by a first plurality of interrupt sources, and a daisy chain interface operable to receive a daisy chain interrupt request output by a further interrupt controller based on a second plurality of interrupt requests generated by a second plurality of interrupt sources. The daisy chain interface includes a priority input operable to receive a daisy chain priority signal indicating a priority associated with the daisy chain interrupt request. Prioritization logic is operable to receive the daisy chain priority signal and to apply predetermined prioritisation criteria to determine the highest priority interrupt request selected from the daisy chain interrupt request and the interrupt request generated by the first plurality of interrupt sources. An output interface is operable to output the highest priority interrupt request, the output interface including a priority output operable to provide an output priority signal indicating a priority associated with the highest priority interrupt request.

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Richmond, United Kingdom

James Robert Hodgson