Intel® Quartus® Prime Pro Edition User Guide: Partial Reconfiguration

ID 683834
Date 1/11/2022
Public

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2.10.2. Simulating PR Persona Replacement

The logical operation of the PR partition changes when a new persona loads during the partial reconfiguration process. Simulate the replacement of personas using multiplexers on the input and output of the persona under simulation.

Create RTL wrapper logic to represent the top-level of the persona. The wrapper instantiates the default persona during compilation. During simulation, the wrapper allows the replacement of the active persona with another persona. Instantiate each persona as the behavioral RTL in the PR simulation model the Intel® Quartus® Prime EDA Netlist Writer generates.

The Intel® Quartus® Prime software includes simulation modules to interface with your simulation testbench:

  • altera_pr_wrapper_mux_in
  • altera_pr_wrapper_mux_out
  • altera_pr_persona_if (SystemVerilog interface allows you to connect the wrapper multiplexers to a testbench driver)
Figure 31. Simulation of PR Persona Switching

RTL Wrapper for PR Persona Switching Simulation

The pr_activate input of the altera_pr_wrapper_mux_out module enables the MUX to output X. This functionality allows the simulation of unknown outputs from the PR persona, and also verifies the normal operation of the design’s freeze logic. The following code corresponds to the simulation of PR persona switching, shown in the above figure:

module pr_core_wrapper
(
   input wire a,
   input wire b,
   output wire o
);

localparam ENABLE_PERSONA_1 = 1;
localparam ENABLE_PERSONA_2 = 1;
localparam ENABLE_PERSONA_3 = 1;
localparam NUM_PERSONA = 3;

logic pr_activate;
int persona_select;

altera_pr_persona_if persona_bfm();
assign pr_activate = persona_bfm.pr_activate;
assign persona_select = persona_bfm.persona_select;


wire a_mux [NUM_PERSONA-1:0];
wire b_mux [NUM_PERSONA-1:0];
wire o_mux [NUM_PERSONA-1:0];

generate
   if (ENABLE_PERSONA_1) begin
      localparam persona_id = 0;

      `ifdef ALTERA_ENABLE_PR_MODEL
         assign u_persona_0.altera_sim_pr_activate = pr_activate;
      `endif

      pr_and u_persona_0
      (
         .a(a_mux[persona_id]),
         .b(b_mux[persona_id]),
         .o(o_mux[persona_id])
      );
   end
endgenerate

generate
   if (ENABLE_PERSONA_2) begin
      localparam persona_id = 1;

      `ifdef ALTERA_ENABLE_PR_MODEL
         assign u_persona_1.altera_sim_pr_activate = pr_activate;
      `endif

      pr_or u_persona_1
      (
         .a(a_mux[persona_id]),
         .b(b_mux[persona_id]),
         .o(o_mux[persona_id])
      );

   end
endgenerate

generate
   if (ENABLE_PERSONA_3) begin
      localparam persona_id = 2;

      `ifdef ALTERA ENABLE PR MODEL
         assign u_persona_2.altera_sim_pr_activate = pr_activate;
      `endif

      pr_empty u_persona_2
      (
         .a(a_mux[persona_id]),
         .b(b_mux[persona_id]),
         .o(o_mux[persona_id])
      );

   end
endgenerate


altera_pr_wrapper_mux_in #(.NUM_PERSONA(NUM_PERSONA), .WIDTH(1)) \
     u_a_mux(.sel(persona_select), .mux_in(a), .mux_out(a_mux));

altera_pr_wrapper_mux_in #(.NUM_PERSONA(NUM_PERSONA), .WIDTH(1)) \
     u_b_mux(.sel(persona_select), .mux_in(b), .mux_out(b_mux));

altera_pr_wrapper_mux_out #(.NUM_PERSONA(NUM_PERSONA), .WIDTH(1)) \
     u_o_mux(.sel(persona_select), .mux_in(o_mux), .mux_out(o), .pr_activate \
     (pr_activate));

endmodule

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