//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// Copyright (C) 2017 Authors and OPENCORES.ORG ////
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//// Copyright (C) 2017 Authors and OPENCORES.ORG ////
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//// ////
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//// ////
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//// This source file may be used and distributed without ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// later version. ////
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//// ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// details. ////
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//// ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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module
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module
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recursive_axis_catenate
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recursive_axis_catenate
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#(
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#(
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N, // data bus width in bytes
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N, // data bus width in bytes
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I = 1, // TID width
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I = 1, // TID width
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D = 1, // TDEST width
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D = 1, // TDEST width
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U = 1, // TUSER width
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U = 1, // TUSER width
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U_IS_EOP = -1,
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U_IS_EOP = -1,
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MA, // mux select width
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MN // number of inputs to mux
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MD = 2 ** MA
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)
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)
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(
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(
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axis_if axis_in [MD-1:0],
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axis_if axis_in[MN-1:0],
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axis_if axis_out,
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axis_if axis_out,
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input aclk,
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input aclk,
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input aresetn
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input aresetn
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);
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);
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// --------------------------------------------------------------------
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// synthesis translate_off
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initial begin
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assert(MN > 0) else $fatal;
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end
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// synthesis translate_on
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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localparam MA = $clog2(MN); // mux select width
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localparam MH = 2 ** (MA - 1); // half of ceil(number of inputs)
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localparam MR = MN - MH; // upper remainder
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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//
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generate
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generate
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if(MA == 1)
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if(MN == 1) begin : one
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begin: catenate_gen
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axis_alias axis_alias_i(axis_in[0], axis_out);
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end
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else if(MN == 2) begin : two
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axis_catenate #(.N(N), .I(I), .D(D), .U(U), .U_IS_EOP(U_IS_EOP))
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axis_catenate #(.N(N), .I(I), .D(D), .U(U), .U_IS_EOP(U_IS_EOP))
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axis_catenate_i(.*);
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axis_catenate_i(.*);
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end
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end
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else
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else begin: recurse
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begin: recursive_catenate_gen
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// --------------------------------------------------------------------
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//
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axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_catenate_out[1:0](.*);
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axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_catenate_out[1:0](.*);
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recursive_axis_catenate
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recursive_axis_catenate
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#(
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#( .N(N)
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.N(N),
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, .I(I)
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.I(I),
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, .D(D)
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.D(D),
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, .U(U)
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.U(U),
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, .U_IS_EOP(U_IS_EOP)
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.U_IS_EOP(U_IS_EOP),
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, .MN(MH)
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.MA(MA - 1)
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)
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)
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catenate_lo
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catenate_lo
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(
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( .axis_in(axis_in[MH-1:0]),
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.axis_in(axis_in[(MD/2)-1:0]),
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.axis_out(axis_catenate_out[0]),
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.axis_out(axis_catenate_out[0]),
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.*
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.* );
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);
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// --------------------------------------------------------------------
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if(MR == 1) begin : one
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//
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axis_alias axis_alias_i(axis_in[MH], axis_catenate_out[1]);
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end
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else if(MR == 2) begin : two
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axis_catenate #(.N(N), .I(I), .D(D), .U(U), .U_IS_EOP(U_IS_EOP))
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axis_catenate_i
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( .axis_in(axis_in[MH+1:MH]),
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.axis_out(axis_catenate_out[1]),
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.* );
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end
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else begin : more
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recursive_axis_catenate
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recursive_axis_catenate
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#(
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#( .N(N)
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.N(N),
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, .I(I)
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.I(I),
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, .D(D)
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.D(D),
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, .U(U)
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.U(U),
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, .U_IS_EOP(U_IS_EOP)
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.U_IS_EOP(U_IS_EOP),
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, .MN(MR)
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.MA(MA - 1)
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)
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)
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catenate_hi
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catenate_hi
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(
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( .axis_in(axis_in[MN-1:MN-MR]),
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.axis_in(axis_in[MD-1:(MD/2)]),
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.axis_out(axis_catenate_out[1]),
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.axis_out(axis_catenate_out[1]),
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.*
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.* );
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);
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end
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// --------------------------------------------------------------------
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axis_catenate #(.N(N), .I(I), .D(D), .U(U), .U_IS_EOP(U_IS_EOP))
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//
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axis_catenate
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#(
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.N(N),
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.I(I),
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.D(D),
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.U(U),
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.U_IS_EOP(U_IS_EOP)
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)
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axis_catenate_i(.axis_in(axis_catenate_out), .*);
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axis_catenate_i(.axis_in(axis_catenate_out), .*);
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end
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end
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endgenerate
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endgenerate
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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//
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endmodule
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endmodule
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