AN 709: HPS SoC Boot Guide - Cyclone V SoC Development Kit

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ID 683265
Date 1/27/2016
Public
Document Table of Contents
Document Table of Contents x
1. AN 709: HPS SoC Boot Guide - Cyclone V SoC Development Kit
1. AN 709: HPS SoC Boot Guide - Cyclone V SoC Development Kit x
1.1. Introduction 1.2. Boot Overview 1.3. Boot Duration 1.4. Boot Debugging 1.5. Boot Examples 1.6. Document Revision History
1.1. Introduction x
1.1.1. Prerequisite
1.2. Boot Overview x
1.2.1. Boot Flow 1.2.2. Boot Sources 1.2.3. Boot Clocks
1.2.1. Boot Flow x
1.2.1.1. Boot ROM 1.2.1.2. Preloader 1.2.1.3. Bootloader
1.2.2. Boot Sources x
1.2.2.1. Boot from SD/MMC 1.2.2.2. Boot from QSPI 1.2.2.3. Boot from NAND 1.2.2.4. Boot from FPGA 1.2.2.5. FPGA Fallback Boot 1.2.2.6. Boot from RAM on Warm Reset
1.3. Boot Duration x
1.3.1. Optimizing Boot Duration 1.3.2. Boot Duration Measurements
1.3.1. Optimizing Boot Duration x
1.3.1.1. Hardware Powerup Sequence 1.3.1.2. Boot ROM 1.3.1.3. Preloader 1.3.1.4. Bootloader 1.3.1.5. Linux Kernel 1.3.1.6. Init Scripts
1.4. Boot Debugging x
1.4.1. Boot ROM 1.4.2. Preloader 1.4.3. U-Boot
1.4.2. Preloader x
1.4.2.1. Debugging the Preloader from ARM DS-5 AE
1.5. Boot Examples x
1.5.1. Bare-Metal Application 1.5.2. Booting from SD/MMC – Custom Partition 1.5.3. Booting from SD/MMC – FAT Partition 1.5.4. Booting from QSPI Flash 1.5.5. Booting from FPGA
1.5.5. Booting from FPGA x
1.5.5.1. Overview 1.5.5.2. Hardware Design 1.5.5.3. Building and Running the Example
1. AN 709: HPS SoC Boot Guide - Cyclone V SoC Development Kit

1.3.1.4. Bootloader

The duration of the Bootloader is influenced by the following:

  • Size of the next stage to be loaded (Linux kernel for example)
  • Location of the next stage (flash, network, etc)
  • Whether networking is enabled, and is statically or dynamically (DHCP) configured
  • Whether FPGA programming is also performed
  • Speed of SDRAM
  • Countdown counter3 (default 5s in U-Boot – can be disabled for production systems)
3 Can be tweaked to achieve faster boot time.
Level Two Title