Nios® II Processor Reference Guide

ID 683836
Date 10/22/2020
Public
Document Table of Contents

8.5.51. initi

Instruction initialize instruction cache line
Operation

Initializes the instruction cache line associated with address rA.

Assembler Syntax

initi rA

Example

initi r6

Description

Ignoring the tag, initi identifies the instruction cache line associated with the byte address in ra, and initi invalidates that line.

If the Nios® II processor core does not have an instruction cache, the initi instruction performs no operation.

Usage

This instruction is used to initialize the processor’s instruction cache. Immediately after processor reset, use initi to invalidate each line of the instruction cache.

For more information on instruction cache, refer to the Cache and Tightly Coupled Memory chapter of the Nios II Software Developer’s Handbook.

Exceptions

Supervisor-only instruction

Instruction Type

R

Instruction Fields

A = Register index of operand rA

Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
A 0 0 0x29
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x29 0 0x3a

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