Intel 80310 I/O Processor Chipset AAU Coding Techniques

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Intel ® 80310 I/O Processor Chipset AAU Coding TechniquesLow-Level Design Document3.1.6.2.9 static void aau_irq_handler(int irq, void *dev_id, structpt_regs *regs);Input:Output:irq –IRQnumberdev_id – Device Descriptorregs – CPU registers (not used but required)N/APurpose: This is the interrupt handler for AAU interrupts. It handles any error interrupts or chaincomplete interrupts depending on the status in the ASR. A bottom handler queued in theimmediate task queue by this function begins to process everything in the holding queuewhen this function exits and the kernel leaves the interrupt space.Operation:• If not AAU interrupt—Exit• If AAU error—Callaau_flush_all()• While AAU complete INTs—ClearASR—Callaau_process()• Register bottom handler22 White Paper
Intel ® 80310 I/O Processor Chipset AAU Coding TechniquesLow-Level Design DocumentFigure 3.Interrupt Handler Functional Flow DiagramEnterInterruptHandlerCheck if INTfor AAUNoYesFlush AAU / ClearErrorsYesCheck anyerrors in ASRNoMove desc fromprocess to holdingQNoDone?YesSchedule INTbottom handlerExitWhite Paper 23
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Intel 80310 I/O Processor Chipset AAU Coding Techniques

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