Nios II Classic Processor Reference Guide

ID 683620
Date 10/28/2016
Document Table of Contents

2.5.1. Exception Controller

The Nios II architecture provides a simple, nonvectored exception controller to handle all exception types. Each exception, including internal hardware interrupts, causes the processor to transfer execution to an exception address. An exception handler at this address determines the cause of the exception and dispatches an appropriate exception routine.

Exception addresses are specified with the Platform Designer Nios® II Processor parameter editor.

All exceptions are precise. Precise means that the processor has completed execution of all instructions preceding the faulting instruction and not started execution of instructions following the faulting instruction. Precise exceptions allow the processor to resume program execution once the exception handler clears the exception.