//======================================================================
//
// rng_selector.v
// -----------------
// Top level wrapper that creates the Cryptech coretest system.
// The wrapper contains instances of external interface, coretest
// and the core to be tested. And if more than one core is
// present the wrapper also includes address and data muxes.
//
//
// Authors: Joachim Strombergson, Paul Selkirk, Pavel Shatov
// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// - Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
//
// - Neither the name of the NORDUnet nor the names of its contributors may
//   be used to endorse or promote products derived from this software
//   without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//======================================================================

module rng_selector
  (
   input wire           sys_clk,
   input wire           sys_rst_n,
   input wire           sys_ena,

   input wire [13: 0]   sys_eim_addr,
   input wire           sys_eim_wr,
   input wire           sys_eim_rd,
   output wire [31 : 0] sys_read_data,
   input wire [31 : 0]  sys_write_data,
   output wire          sys_error,

   input wire           noise,
   output wire [7 : 0]  debug
   );


   // This is a pass-through to trng.v, which instantiates and muxes the
   // entropy sources, mixer, and csprng.

   trng trng_inst
     (
      .clk(sys_clk),
      .reset_n(sys_rst_n),

      .cs(sys_ena & (sys_eim_rd | sys_eim_wr)),
      .we(sys_eim_wr),

      .address(sys_eim_addr[11:0]),
      .write_data(sys_write_data),
      .read_data(sys_read_data),
      .error(sys_error),

      .avalanche_noise(noise),
      .debug(debug)
      );

endmodule

//======================================================================
// EOF rng_selector.v
//======================================================================