Nios II Classic Software Developer’s Handbook

ID 683282
Date 5/14/2015
Public
Document Table of Contents

4.10.5. Run-time Configurable Reset Configuration

The reset address points to a memory that contains code that executes before the normal reset code. When the processor comes out of reset, it executes code in the reset memory that computes the desired reset address and then jumps to it. This boot configuration allows a processor with a hard-wired reset address to appear to reset to a programmable address.

This boot configuration has the following characteristics:

  • alt_load() might be called (depends on boot configuration)
  • No code at reset in executable file

Because the processor reset address points to an additional memory, the algorithms used by the default Tcl script to select the appropriate boot configuration might make the wrong choice. The individual BSP settings specified by the default Tcl script need to be explicitly controlled.