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/* 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 Wormhole/SDM router top level module *** SystemVerilog is used *** History: 28/05/2009 Initial version. <wsong83@gmail.com> 23/09/2010 Supporting channel slicing and SDM using macro difinitions. <wsong83@gmail.com> 22/10/2010 Parameterize the number of pipelines in output buffers. <wsong83@gmail.com> 25/05/2011 Clean up for opensource. <wsong83@gmail.com> */ // the router structure definitions `include "define.v" module router(/*AUTOARG*/ // Outputs so0, so1, so2, so3, wo0, wo1, wo2, wo3, no0, no1, no2, no3, eo0, eo1, eo2, eo3, lo0, lo1, lo2, lo3, so4, wo4, no4, eo4, lo4, sia, wia, nia, eia, lia, // Inputs si0, si1, si2, si3, wi0, wi1, wi2, wi3, ni0, ni1, ni2, ni3, ei0, ei1, ei2, ei3, li0, li1, li2, li3, si4, wi4, ni4, ei4, li4, soa, woa, noa, eoa, loa, addrx, addry, rst_n ); parameter VCN = 1; // number of virtual circuits in each direction. When VCN == 1, it is a wormhole router parameter DW = 32; // the datawidth of a single virtual circuit, the total data width of the router is DW*VCN parameter IPD = 1; // the number of half-buffer stages in input buffers parameter OPD = 2; // the number of half-buffer stages in output buffers parameter SCN = DW/2; // the number of 1-of-4 sub-channel in each virtual circuit input [VCN-1:0][SCN-1:0] si0, si1, si2, si3; // south input [0], X+1 input [VCN-1:0][SCN-1:0] wi0, wi1, wi2, wi3; // west input [1], Y-1 input [VCN-1:0][SCN-1:0] ni0, ni1, ni2, ni3; // north input [2], X-1 input [VCN-1:0][SCN-1:0] ei0, ei1, ei2, ei3; // east input [3], Y+1 input [VCN-1:0][SCN-1:0] li0, li1, li2, li3; // local input output [VCN-1:0][SCN-1:0] so0, so1, so2, so3; // south output output [VCN-1:0][SCN-1:0] wo0, wo1, wo2, wo3; // west output output [VCN-1:0][SCN-1:0] no0, no1, no2, no3; // north output output [VCN-1:0][SCN-1:0] eo0, eo1, eo2, eo3; // east output output [VCN-1:0][SCN-1:0] lo0, lo1, lo2, lo3; // local output // eof bits and ack lines `ifdef ENABLE_CHANNEL_SLICING input [VCN-1:0][SCN-1:0] si4, wi4, ni4, ei4, li4; output [VCN-1:0][SCN-1:0] so4, wo4, no4, eo4, lo4; output [VCN-1:0][SCN-1:0] sia, wia, nia, eia, lia; input [VCN-1:0][SCN-1:0] soa, woa, noa, eoa, loa; `else input [VCN-1:0] si4, wi4, ni4, ei4, li4; output [VCN-1:0] so4, wo4, no4, eo4, lo4; output [VCN-1:0] sia, wia, nia, eia, lia; input [VCN-1:0] soa, woa, noa, eoa, loa; `endif // !`ifdef ENABLE_CHANNEL_SLICING input [7:0] addrx, addry; // the local address of the router, coded in 1-of-4 coding input rst_n; // active low reset signal // internal wires, input buffers to switches (crossbar): [dir]2[cb][1-of-4 index] wire [VCN-1:0][SCN-1:0] s2c0, s2c1, s2c2, s2c3; // south input to switch data wire [VCN-1:0][SCN-1:0] w2c0, w2c1, w2c2, w2c3; wire [VCN-1:0][SCN-1:0] n2c0, n2c1, n2c2, n2c3; wire [VCN-1:0][SCN-1:0] e2c0, e2c1, e2c2, e2c3; wire [VCN-1:0][SCN-1:0] l2c0, l2c1, l2c2, l2c3; // internal wires, switches (crossbar) to output buffers: [cb]2[dir][1-of-4 index] wire [VCN-1:0][SCN-1:0] c2s0, c2s1, c2s2, c2s3; wire [VCN-1:0][SCN-1:0] c2w0, c2w1, c2w2, c2w3; wire [VCN-1:0][SCN-1:0] c2n0, c2n1, c2n2, c2n3; // switch to north output wire [VCN-1:0][SCN-1:0] c2e0, c2e1, c2e2, c2e3; wire [VCN-1:0][SCN-1:0] c2l0, c2l1, c2l2, c2l3; // internal wires for ack and eof bits `ifdef ENABLE_CHANNEL_SLICING wire [VCN-1:0][SCN-1:0] s2c4, w2c4, n2c4, e2c4, l2c4; wire [VCN-1:0][SCN-1:0] c2s4, c2w4, c2n4, c2e4, c2l4; wire [VCN-1:0][SCN-1:0] s2ca, w2ca, n2ca, e2ca, l2ca; wire [VCN-1:0][SCN-1:0] c2sa, c2wa, c2na, c2ea, c2la; `else wire [VCN-1:0] s2c4, w2c4, n2c4, e2c4, l2c4; wire [VCN-1:0] c2s4, c2w4, c2n4, c2e4, c2l4; wire [VCN-1:0] s2ca, w2ca, n2ca, e2ca, l2ca; wire [VCN-1:0] c2sa, c2wa, c2na, c2ea, c2la; `endif // !`ifdef ENABLE_CHANNEL_SLICING // the requests/acks from/to input buffers to switch allocators wire [VCN-1:0][3:0] sreq, nreq, lreq; wire [VCN-1:0][1:0] wreq, ereq; wire [VCN-1:0] sack, wack, nack, eack, lack; // configuration bits for the switches `ifdef ENABLE_CLOS wire [4:0][VCN-1:0][VCN-1:0] imcfg; wire [VCN-1:0][1:0] scfg, ncfg; wire [VCN-1:0][3:0] wcfg, ecfg, lcfg; `else // normal crossbar based SDM wire [VCN-1:0][2*VCN-1:0] scfg, ncfg; wire [VCN-1:0][4*VCN-1:0] wcfg, ecfg, lcfg; `endif genvar i; generate for (i=0; i<VCN; i++) begin: SC // --------------- input buffers ------------------- // inp_buf #(.DIR(0), .RN(4), .DW(DW), .PD(IPD)) SIB ( .o0 ( s2c0[i] ), .o1 ( s2c1[i] ), .o2 ( s2c2[i] ), .o3 ( s2c3[i] ), .o4 ( s2c4[i] ), .ia ( sia[i] ), .arb_r ( sreq[i] ), .rst_n ( rst_n ), .i0 ( si0[i] ), .i1 ( si1[i] ), .i2 ( si2[i] ), .i3 ( si3[i] ), .i4 ( si4[i] ), .oa ( s2ca[i] ), .addrx ( addrx ), .addry ( addry ), .arb_ra ( sack[i] ) ); inp_buf #(.DIR(1), .RN(2), .DW(DW), .PD(IPD)) WIB ( .o0 ( w2c0[i] ), .o1 ( w2c1[i] ), .o2 ( w2c2[i] ), .o3 ( w2c3[i] ), .o4 ( w2c4[i] ), .ia ( wia[i] ), .arb_r ( wreq[i] ), .rst_n ( rst_n ), .i0 ( wi0[i] ), .i1 ( wi1[i] ), .i2 ( wi2[i] ), .i3 ( wi3[i] ), .i4 ( wi4[i] ), .oa ( w2ca[i] ), .addrx ( addrx ), .addry ( addry ), .arb_ra ( wack[i] ) ); inp_buf #(.DIR(2), .RN(4), .DW(DW), .PD(IPD)) NIB ( .o0 ( n2c0[i] ), .o1 ( n2c1[i] ), .o2 ( n2c2[i] ), .o3 ( n2c3[i] ), .o4 ( n2c4[i] ), .ia ( nia[i] ), .arb_r ( nreq[i] ), .rst_n ( rst_n ), .i0 ( ni0[i] ), .i1 ( ni1[i] ), .i2 ( ni2[i] ), .i3 ( ni3[i] ), .i4 ( ni4[i] ), .oa ( n2ca[i] ), .addrx ( addrx ), .addry ( addry ), .arb_ra ( nack[i] ) ); inp_buf #(.DIR(3), .RN(2), .DW(DW), .PD(IPD)) EIB ( .o0 ( e2c0[i] ), .o1 ( e2c1[i] ), .o2 ( e2c2[i] ), .o3 ( e2c3[i] ), .o4 ( e2c4[i] ), .ia ( eia[i] ), .arb_r ( ereq[i] ), .rst_n ( rst_n ), .i0 ( ei0[i] ), .i1 ( ei1[i] ), .i2 ( ei2[i] ), .i3 ( ei3[i] ), .i4 ( ei4[i] ), .oa ( e2ca[i] ), .addrx ( addrx ), .addry ( addry ), .arb_ra ( eack[i] ) ); inp_buf #(.DIR(4), .RN(4), .DW(DW), .PD(IPD)) LIB ( .o0 ( l2c0[i] ), .o1 ( l2c1[i] ), .o2 ( l2c2[i] ), .o3 ( l2c3[i] ), .o4 ( l2c4[i] ), .ia ( lia[i] ), .arb_r ( lreq[i] ), .rst_n ( rst_n ), .i0 ( li0[i] ), .i1 ( li1[i] ), .i2 ( li2[i] ), .i3 ( li3[i] ), .i4 ( li4[i] ), .oa ( l2ca[i] ), .addrx ( addrx ), .addry ( addry ), .arb_ra ( lack[i] ) ); // --------------------- output buffers ---------------- // outp_buf #(.DW(DW), .PD(OPD)) SOB ( .o0 ( so0[i] ), .o1 ( so1[i] ), .o2 ( so2[i] ), .o3 ( so3[i] ), .o4 ( so4[i] ), .oa ( soa[i] ), .i0 ( c2s0[i] ), .i1 ( c2s1[i] ), .i2 ( c2s2[i] ), .i3 ( c2s3[i] ), .i4 ( c2s4[i] ), .ia ( c2sa[i] ), .rst_n ( rst_n ) ); outp_buf #(.DW(DW), .PD(OPD)) WOB ( .o0 ( wo0[i] ), .o1 ( wo1[i] ), .o2 ( wo2[i] ), .o3 ( wo3[i] ), .o4 ( wo4[i] ), .oa ( woa[i] ), .i0 ( c2w0[i] ), .i1 ( c2w1[i] ), .i2 ( c2w2[i] ), .i3 ( c2w3[i] ), .i4 ( c2w4[i] ), .ia ( c2wa[i] ), .rst_n ( rst_n ) ); outp_buf #(.DW(DW), .PD(OPD)) NOB ( .o0 ( no0[i] ), .o1 ( no1[i] ), .o2 ( no2[i] ), .o3 ( no3[i] ), .o4 ( no4[i] ), .oa ( noa[i] ), .i0 ( c2n0[i] ), .i1 ( c2n1[i] ), .i2 ( c2n2[i] ), .i3 ( c2n3[i] ), .i4 ( c2n4[i] ), .ia ( c2na[i] ), .rst_n ( rst_n ) ); outp_buf #(.DW(DW), .PD(OPD)) EOB ( .o0 ( eo0[i] ), .o1 ( eo1[i] ), .o2 ( eo2[i] ), .o3 ( eo3[i] ), .o4 ( eo4[i] ), .oa ( eoa[i] ), .i0 ( c2e0[i] ), .i1 ( c2e1[i] ), .i2 ( c2e2[i] ), .i3 ( c2e3[i] ), .i4 ( c2e4[i] ), .ia ( c2ea[i] ), .rst_n ( rst_n ) ); outp_buf #(.DW(DW), .PD(OPD)) LOB ( .o0 ( lo0[i] ), .o1 ( lo1[i] ), .o2 ( lo2[i] ), .o3 ( lo3[i] ), .o4 ( lo4[i] ), .oa ( loa[i] ), .i0 ( c2l0[i] ), .i1 ( c2l1[i] ), .i2 ( c2l2[i] ), .i3 ( c2l3[i] ), .i4 ( c2l4[i] ), .ia ( c2la[i] ), .rst_n ( rst_n ) ); end // block: SC endgenerate `ifdef ENABLE_CLOS dclos #(.MN(VCN), .NN(VCN), .DW(DW)) CB ( .so0 ( c2s0 ), .so1 ( c2s1 ), .so2 ( c2s2 ), .so3 ( c2s3 ), .so4 ( c2s4 ), .soa ( c2sa ), .wo0 ( c2w0 ), .wo1 ( c2w1 ), .wo2 ( c2w2 ), .wo3 ( c2w3 ), .wo4 ( c2w4 ), .woa ( c2wa ), .no0 ( c2n0 ), .no1 ( c2n1 ), .no2 ( c2n2 ), .no3 ( c2n3 ), .no4 ( c2n4 ), .noa ( c2na ), .eo0 ( c2e0 ), .eo1 ( c2e1 ), .eo2 ( c2e2 ), .eo3 ( c2e3 ), .eo4 ( c2e4 ), .eoa ( c2ea ), .lo0 ( c2l0 ), .lo1 ( c2l1 ), .lo2 ( c2l2 ), .lo3 ( c2l3 ), .lo4 ( c2l4 ), .loa ( c2la ), .si0 ( s2c0 ), .si1 ( s2c1 ), .si2 ( s2c2 ), .si3 ( s2c3 ), .si4 ( s2c4 ), .sia ( s2ca ), .wi0 ( w2c0 ), .wi1 ( w2c1 ), .wi2 ( w2c2 ), .wi3 ( w2c3 ), .wi4 ( w2c4 ), .wia ( w2ca ), .ni0 ( n2c0 ), .ni1 ( n2c1 ), .ni2 ( n2c2 ), .ni3 ( n2c3 ), .ni4 ( n2c4 ), .nia ( n2ca ), .ei0 ( e2c0 ), .ei1 ( e2c1 ), .ei2 ( e2c2 ), .ei3 ( e2c3 ), .ei4 ( e2c4 ), .eia ( e2ca ), .li0 ( l2c0 ), .li1 ( l2c1 ), .li2 ( l2c2 ), .li3 ( l2c3 ), .li4 ( l2c4 ), .lia ( l2ca ), .imcfg ( imcfg ), .wcfg ( wcfg ), .ecfg ( ecfg ), .lcfg ( lcfg ), .scfg ( scfg ), .ncfg ( ncfg ) ) ; clos_sch #(.M(VCN), .N(VCN)) ALLOC ( .sack ( sack ), .wack ( wack ), .nack ( nack ), .eack ( eack ), .lack ( lack ), .imc ( imcfg ), .scfg ( scfg ), .ncfg ( ncfg ), .wcfg ( wcfg ), .ecfg ( ecfg ), .lcfg ( lcfg ), .sreq ( sreq ), .nreq ( nreq ), .lreq ( lreq ), .wreq ( wreq ), .ereq ( ereq ), .rst_n ( rst_n ) ); `else // Crossbar based SDM dcb_xy #(.VCN(VCN), .VCW(DW)) CB ( .so0 ( c2s0 ), .so1 ( c2s1 ), .so2 ( c2s2 ), .so3 ( c2s3 ), .so4 ( c2s4 ), .soa ( c2sa ), .wo0 ( c2w0 ), .wo1 ( c2w1 ), .wo2 ( c2w2 ), .wo3 ( c2w3 ), .wo4 ( c2w4 ), .woa ( c2wa ), .no0 ( c2n0 ), .no1 ( c2n1 ), .no2 ( c2n2 ), .no3 ( c2n3 ), .no4 ( c2n4 ), .noa ( c2na ), .eo0 ( c2e0 ), .eo1 ( c2e1 ), .eo2 ( c2e2 ), .eo3 ( c2e3 ), .eo4 ( c2e4 ), .eoa ( c2ea ), .lo0 ( c2l0 ), .lo1 ( c2l1 ), .lo2 ( c2l2 ), .lo3 ( c2l3 ), .lo4 ( c2l4 ), .loa ( c2la ), .si0 ( s2c0 ), .si1 ( s2c1 ), .si2 ( s2c2 ), .si3 ( s2c3 ), .si4 ( s2c4 ), .sia ( s2ca ), .wi0 ( w2c0 ), .wi1 ( w2c1 ), .wi2 ( w2c2 ), .wi3 ( w2c3 ), .wi4 ( w2c4 ), .wia ( w2ca ), .ni0 ( n2c0 ), .ni1 ( n2c1 ), .ni2 ( n2c2 ), .ni3 ( n2c3 ), .ni4 ( n2c4 ), .nia ( n2ca ), .ei0 ( e2c0 ), .ei1 ( e2c1 ), .ei2 ( e2c2 ), .ei3 ( e2c3 ), .ei4 ( e2c4 ), .eia ( e2ca ), .li0 ( l2c0 ), .li1 ( l2c1 ), .li2 ( l2c2 ), .li3 ( l2c3 ), .li4 ( l2c4 ), .lia ( l2ca ), .wcfg ( wcfg ), .ecfg ( ecfg ), .lcfg ( lcfg ), .scfg ( scfg ), .ncfg ( ncfg ) ) ; sdm_sch #(.VCN(VCN)) ALLOC ( .sack ( sack ), .wack ( wack ), .nack ( nack ), .eack ( eack ), .lack ( lack ), .scfg ( scfg ), .ncfg ( ncfg ), .wcfg ( wcfg ), .ecfg ( ecfg ), .lcfg ( lcfg ), .sreq ( sreq ), .nreq ( nreq ), .lreq ( lreq ), .wreq ( wreq ), .ereq ( ereq ), .rst_n ( rst_n ) ); `endif endmodule // router