/*
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/*
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Asynchronous SDM NoC
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Asynchronous SDM NoC
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(C)2011 Wei Song
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(C)2011 Wei Song
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Advanced Processor Technologies Group
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Advanced Processor Technologies Group
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Computer Science, the Univ. of Manchester, UK
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Computer Science, the Univ. of Manchester, UK
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Authors:
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Authors:
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Wei Song wsong83@gmail.com
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Wei Song wsong83@gmail.com
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License: LGPL 3.0 or later
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License: LGPL 3.0 or later
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M-to-1 asynchronous multi-way MUTEX arbiter.
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M-to-1 asynchronous multi-way MUTEX arbiter.
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History:
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History:
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24/05/2009 Initial version. <wsong83@gmail.com>
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24/05/2009 Initial version. <wsong83@gmail.com>
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23/05/2011 Clean up for opensource. <wsong83@gmail.com>
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23/05/2011 Clean up for opensource. <wsong83@gmail.com>
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*/
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*/
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module mutex_arb (/*AUTOARG*/
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module mutex_arb (/*AUTOARG*/
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// Outputs
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// Outputs
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gnt,
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gnt,
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// Inputs
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// Inputs
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req
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req
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);
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);
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parameter wd = 4; // the number of request inputs
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parameter wd = 4; // the number of request inputs
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input [wd-1:0] req;
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input [wd-1:0] req;
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output [wd-1:0] gnt;
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output [wd-1:0] gnt;
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genvar i,j;
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genvar i,j;
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wire [wd-1:0] arb_w [wd-1:0];
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wire [wd-1:0] arb_w [wd-1:0];
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wire [wd-1:0] gnt;
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wire [wd-1:0] gnt;
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generate
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generate
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for(i=0; i<wd; i=i+1) begin:lv
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for(i=0; i<wd; i=i+1) begin:lv
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for(j=i+1; j<wd; j=j+1) begin:b
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for(j=i+1; j<wd; j=j+1) begin:b
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mutex ME ( .a(arb_w[i][j-1]), .b(arb_w[j][i]), .qa(arb_w[i][j]), .qb(arb_w[j][i+1]));
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mutex2 ME ( .a(arb_w[i][j-1]), .b(arb_w[j][i]), .qa(arb_w[i][j]), .qb(arb_w[j][i+1]));
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end
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end
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assign arb_w[i][0] = req[i];
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assign arb_w[i][0] = req[i];
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assign gnt[i] = arb_w[i][wd-1];
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assign gnt[i] = arb_w[i][wd-1];
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end
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end
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endgenerate
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endgenerate
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endmodule // mutex_arb
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endmodule // mutex_arb
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