Subversion Repositories qaz_libs

//////////////////////////////////////////////////////////////////////
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//// Copyright (C) 2015 Authors and OPENCORES.ORG                 ////
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//// This source file is free software; you can redistribute it   ////
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//////////////////////////////////////////////////////////////////////


module
  recursive_axis_mux
  #(
    N, // data bus width in bytes
    I = 1, // TID width
    D = 1, // TDEST width
    U = 1, // TUSER width
    MA, // mux select width
    MD = 2 ** MA
  )
  (
    input [MA-1:0]  select,
    axis_if         axis_in [MD-1:0],
    axis_if         axis_out,
    input           aclk,
    input           aresetn
  );

  // --------------------------------------------------------------------
  //
  generate
    if(MA == 1)
    begin: mux_gen
      axis_mux #(.N(N), .I(I), .D(D), .U(U))
        axis_mux_i(.*);
    end
    else
    begin: recurse_mux_gen
      axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_mux_out[1:0](.*);

      recursive_axis_mux #(.N(N), .I(I), .D(D), .U(U), .MA(MA - 1))
        mux_lo
        (
          .select(select[MA-2:0]),
          .axis_in(axis_in[(MD/2)-1:0]),
          .axis_out(axis_mux_out[0]),
          .*
        );

      recursive_axis_mux #(.N(N), .I(I), .D(D), .U(U), .MA(MA - 1))
        mux_hi
        (
          .select(select[MA-2:0]),
          .axis_in(axis_in[MD-1:(MD/2)]),
          .axis_out(axis_mux_out[1]),
          .*
        );

      axis_mux #(.N(N), .I(I), .D(D), .U(U))
        axis_mux_i
        (
          .select(select[MA-1]),
          .axis_in(axis_mux_out),
          .*
        );
    end
  endgenerate


// --------------------------------------------------------------------
//
endmodule