Subversion Repositories async_sdm_noc

/*

 Asynchronous SDM NoC

 (C)2011 Wei Song

 Advanced Processor Technologies Group

 Computer Science, the Univ. of Manchester, UK

 Authors:

 Wei Song     wsong83@gmail.com

 License: LGPL 3.0 or later

 M-to-1 asynchronous multi-way MUTEX arbiter.

 History:

 24/05/2009  Initial version. <wsong83@gmail.com>

 23/05/2011  Clean up for opensource. <wsong83@gmail.com>

*/

module mutex_arb (/*AUTOARG*/

   // Outputs

   gnt,

   // Inputs

   req

   );

   parameter wd = 4;            // the number of request inputs

   input  [wd-1:0]    req;

   output [wd-1:0]    gnt;

   genvar             i,j;

   wire [wd-1:0]      arb_w [wd-1:0];

   wire [wd-1:0]      gnt;

   generate

      for(i=0; i<wd; i=i+1) begin:lv

         for(j=i+1; j<wd; j=j+1) begin:b

            mutex ME ( .a(arb_w[i][j-1]),     .b(arb_w[j][i]),  .qa(arb_w[i][j]),     .qb(arb_w[j][i+1]));

         end

         assign arb_w[i][0] = req[i];

         assign gnt[i] = arb_w[i][wd-1];

      end

   endgenerate

endmodule // mutex_arb