User Interrupts - 2.0 English

Versal Adaptive SoC DMA and Bridge Subsystem for PCI Express Product Guide (PG344)

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2.0 English

The user logic must hold usr_irq_req active-High even after receiving usr_irq_ack (acks) to keep the interrupt pending register asserted. This enables the Interrupt Service Routine (ISR) within the driver to determine the source of the interrupt. Once the driver receives user interrupts, the driver or software can reset the user interrupts source to which hardware should respond by deasserting usr_irq_req.