AN 1007: Partial Reconfiguration Design Simulation Tutorial

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ID 819958
Date 5/17/2024
Public
Document Table of Contents
Document Table of Contents x
1. Partial Reconfiguration Design Simulation Tutorial Introduction 2. Partial Reconfiguration Simulation Overview 3. Partial Reconfiguration Simulation Capabilities 4. Types of Verification Achievable Through Simulation 5. Partial Reconfiguration Simulation Requirements 6. Partial Reconfiguration Simulation Reference Design Requirements 7. Partial Reconfiguration Simulation Reference Design Overview 8. Partial Reconfiguration Simulation Reference Design Files 9. PR Simulation Reference Design Walkthrough 10. PR Simulation Results 11. Document Revision History for AN 1007: Partial Reconfiguration Design Simulation Tutorial
9. PR Simulation Reference Design Walkthrough x
9.1. Step 1: Getting Started 9.2. Step 2: Creating a Project Revision for PR Simulation 9.3. Step 3: Adding RTL Design Files to the pr_sim Revision 9.4. Step 4: Adding PR Simulation Design Files to the pr_sim Revision 9.5. Step 5: Generating Gate-level PR Simulation Models for the Persona 9.6. Step 6: Preparing the Setup Simulation Script 9.7. Step 7: Run PR Simulation
10. PR Simulation Results x
10.1. Persona Swapping Simulation 10.2. Reset Sequence Simulation 10.3. Persona using Post-Synthesis Gate-Level PR Simulation Model vs RTL
1. Partial Reconfiguration Design Simulation Tutorial Introduction
2. Partial Reconfiguration Simulation Overview
3. Partial Reconfiguration Simulation Capabilities
4. Types of Verification Achievable Through Simulation
5. Partial Reconfiguration Simulation Requirements
6. Partial Reconfiguration Simulation Reference Design Requirements
7. Partial Reconfiguration Simulation Reference Design Overview
8. Partial Reconfiguration Simulation Reference Design Files
9. PR Simulation Reference Design Walkthrough
10. PR Simulation Results
11. Document Revision History for AN 1007: Partial Reconfiguration Design Simulation Tutorial

5. Partial Reconfiguration Simulation Requirements

“PR mode” of the EDA netlist writer (Required for PR Reset Sequence Verification )

“PR mode” of the EDA netlist is a post-synthesis technology mapped netlist for each persona. It uses PR simulation model of DFFEAS and models:

  • The physical effect of registers powering up as unknown ‘X’ after PR
  • Forcing the registers to unknown ‘X’ during PR
    • Requires the registers to be explicitly reset to a known state after PR
    • Causes all outputs of the PR region being unknown ‘X’ during PR
  • Supports loading 0, 1, or random 0/1 during PR (instead of X)
  • X-pessimistic LUTs models

PR Mode DFFEAS

Adds a new simulation only port on the model, pr_activate, to async load X into the register
  • This has the effect of making the register drive the unknown state
  • Ties pr_activate to a top level signal of the simulation model for the PR persona and drive that signal from the testbench
  • Generates reports for the register values if any of the corresponding events are triggered

PR Simulation Wrapper (Required for Persona Swapping Simulation )

PR Simulation Wrapper instantiate all personas in a single module, Personas can be RTL or PR Simulation model. It also includes

  • Input and output multiplexers (altera_pr_wrapper_mux_in & altera_pr_wrapper_mux_out)
  • PR region interface (altera_pr_persona_if)
    • Allows to connect the wrapper multiplexers to a testbench driver
  • The PR select lines: PR Input/Output Mux Control
    • Simulation-only signals inside the PR region model: to switch between the different PR personas
    • Can be driven by the testbench
Figure 2. PR Simulation Wrapper file example

PR Region Interface : altera_pr_persona_if

It is defined in <QUARTUS_INSTALL_DIR>/eda/sim_lib/altera_lnsim.sv

Figure 3. altera_pr_persona_if file

PR Input and Output Multiplexers

  • Defined in <QUARTUS_INSTALL_DIR> /eda/sim_lib/altera_lnsim.sv
  • Designate which persona is active in the simulation
  • Used for swapping the personas in the design
Figure 4. altera_pr_wrapper_mux_in & altera_pr_wrapper_mux_out files

Testbench

  • Drives the pr_activate and persona_select signals
  • Selects a persona, asserts pr_activate to start PR, deasserts pr_activate, triggers the report storage events, resets the PR region
Figure 5. PR Simulation Wrapper file example
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