Generic Nios II Booting Methods User Guide

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ID 683820
Date 5/24/2016
Public
Document Table of Contents
Document Table of Contents x
1. Generic Nios II Booting Methods User Guide 2. Document Revision History for Generic Nios II Booting Methods
1. Generic Nios II Booting Methods User Guide x
1.1. Overview 1.2. Prerequisites 1.3. Acronym 1.4. Nios II Processor Boot Copier 1.5. Nios II Processor Booting Methods 1.6. Nios II Booting Elements 1.7. Nios II Programming Solutions
1.4. Nios II Processor Boot Copier x
1.4.1. Memcpy-Based Boot Copier 1.4.2. EPCS Controller-Based Boot Copier
1.5. Nios II Processor Booting Methods x
1.5.1. Nios II Booting General Flow 1.5.2. Summary of Nios II Processor Vector Configurations and BSP Settings 1.5.3. Nios II Processor Application Execute-In-Place from CFI Flash 1.5.4. Nios II Processor Application Copied from CFI Flash to RAM Using Boot Copier 1.5.5. Nios II Processor Application Copied from EPCS Flash to RAM Using Boot Copier
1.6. Nios II Booting Elements x
1.6.1. Nios II SBT Makefile 'mem_init_generate' Target 1.6.2. Convert Programming Files Option 1.6.3. Elf2flash Utility
1.7. Nios II Programming Solutions x
1.7.1. Recommended Programming Solution
1. Generic Nios II Booting Methods User Guide
2. Document Revision History for Generic Nios II Booting Methods

1.5.5. Nios II Processor Application Copied from EPCS Flash to RAM Using Boot Copier

The EPCS address space is not mapped into the Altera Avalon EPCS Flash Controller’s Avalon MM slave interface. Instead, read or write accesses are done through CSRs. Upon system reset, the EPCS device needs to be initialized before usage.

For these reasons, the EPCS controller-based boot copier is required for initializing the EPCS device and copying the Nios II application to RAM for execution.

The EPCS controller instantiates a block of boot ROM internally at its base address (offset 0x0, just before EPCS controller’s CSRs) for storing the boot copier. Nios II reset vector offset must set to EPCS controller base address, such that upon system reset the boot copier is executed first to initialize the EPCS controller and device.

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