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`include "pronoc_def.v"
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/**********************************************************************
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** File: mesh_torus_noc.v
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**
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** Copyright (C) 2014-2017 Alireza Monemi
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**
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** This file is part of ProNoC
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**
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** ProNoC ( stands for Prototype Network-on-chip) is free software:
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** you can redistribute it and/or modify it under the terms of the GNU
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** Lesser General Public License as published by the Free Software Foundation,
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** either version 2 of the License, or (at your option) any later version.
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**
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** ProNoC is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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** Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public
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** License along with ProNoC. If not, see .
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**
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**
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** Description:
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** the NoC top module. It generate one of the mesh, torus, ring, or line topologies by
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** connecting routers
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**
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**************************************************************/
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`define router_id(x,y) ((y * NX) + x)
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`define endp_id(x,y,l) ((y * NX) + x) * NL + l
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module mesh_torus_noc_top
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import pronoc_pkg::*;
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(
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reset,
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clk,
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chan_in_all,
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chan_out_all,
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router_event
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);
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input clk,reset;
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//Endpoints ports
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input smartflit_chanel_t chan_in_all [NE-1 : 0];
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output smartflit_chanel_t chan_out_all [NE-1 : 0];
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//Events
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output router_event_t router_event [NR-1 : 0][MAX_P-1 : 0];
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//all routers port
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smartflit_chanel_t router_chan_in [NR-1 :0][MAX_P-1 : 0];
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smartflit_chanel_t router_chan_out [NR-1 :0][MAX_P-1 : 0];
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wire [RAw-1 : 0] current_r_addr [NR-1 : 0];
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// mesh torus
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localparam
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EAST = 3'd1,
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NORTH = 3'd2,
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WEST = 3'd3,
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SOUTH = 3'd4;
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//ring line
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localparam
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FORWARD = 2'd1,
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BACKWARD= 2'd2;
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genvar x,y,l;
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generate
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/* verilator lint_off WIDTH */
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if( TOPOLOGY == "RING" || TOPOLOGY == "LINE") begin : ring_line
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/* verilator lint_on WIDTH */
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for (x=0; x
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assign current_r_addr [x] = x[RAw-1: 0];
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router_top #(
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.P (MAX_P )
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) the_router (
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.current_r_id (x),
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.current_r_addr (current_r_addr [x]),
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.chan_in (router_chan_in [x]),
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.chan_out (router_chan_out[x]),
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.router_event (router_event[x]),
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.clk (clk ),
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.reset (reset ));
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if(x < NX-1) begin: not_last_node
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assign router_chan_in[x][FORWARD] = router_chan_out [(x+1)][BACKWARD];
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end else begin :last_node
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/* verilator lint_off WIDTH */
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if(TOPOLOGY == "LINE") begin : line_last_x
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/* verilator lint_on WIDTH */
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assign router_chan_in[x][FORWARD]= {SMARTFLIT_CHANEL_w{1'b0}};
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end else begin : ring_last_x
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assign router_chan_in[x][FORWARD]= router_chan_out [0][BACKWARD];
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end
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end
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if(x>0)begin :not_first_x
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assign router_chan_in[x][BACKWARD]= router_chan_out [(x-1)][FORWARD];
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end else begin :first_x
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/* verilator lint_off WIDTH */
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if(TOPOLOGY == "LINE") begin : line_first_x
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/* verilator lint_on WIDTH */
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assign router_chan_in[x][BACKWARD]={SMARTFLIT_CHANEL_w{1'b0}};
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end else begin : ring_first_x
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assign router_chan_in[x][BACKWARD]= router_chan_out [(NX-1)][FORWARD];
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end
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end
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// connect other local ports
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for (l=0; l
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localparam ENDPID = `endp_id(x,0,l);
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localparam LOCALP = (l==0) ? l : l + R2R_CHANELS_MESH_TORI; // first local port is connected to router port 0. The rest are connected at the end
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assign router_chan_in[x][LOCALP]= chan_in_all [ENDPID];
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assign chan_out_all [ENDPID] = router_chan_out[x][LOCALP];
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end// locals
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end//x
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end else begin :mesh_torus
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for (y=0; y
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for (x=0; x
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localparam R_ADDR = (y<
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localparam RID = (y * NX) + x;
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assign current_r_addr [RID] = R_ADDR[RAw-1 :0];
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router_top #(
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.P (MAX_P )
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) the_router (
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.current_r_id (RID),
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.current_r_addr (current_r_addr [RID]),
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.chan_in (router_chan_in [RID]),
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.chan_out (router_chan_out[RID]),
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.router_event (router_event[RID]),
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.clk (clk ),
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.reset (reset ));
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/*
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in [x,y][east] <------ out [x+1 ,y ][west] ;
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in [x,y][north] <------ out [x ,y-1][south] ;
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in [x,y][west] <------ out [x-1 ,y ][east] ;
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in [x,y][south] <------ out [x ,y+1][north] ;
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*/
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if(x < NX-1) begin: not_last_x
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assign router_chan_in[`router_id(x,y)][EAST]= router_chan_out [`router_id(x+1,y)][WEST];
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//assign router_credit_in_all [`SELECT_WIRE(x,y,EAST,V)] = router_credit_out_all [`SELECT_WIRE((x+1),y,WEST,V)];
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end else begin :last_x
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/* verilator lint_off WIDTH */
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if(TOPOLOGY == "MESH") begin :last_x_mesh
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][EAST] = {SMARTFLIT_CHANEL_w{1'b0}};
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "TORUS") begin : last_x_torus
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][EAST] = router_chan_out [`router_id(0,y)][WEST];
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "FMESH") begin : last_x_fmesh //connect to endp
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/* verilator lint_on WIDTH */
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localparam EAST_ID = NX*NY*NL + 2*NX + NY +y;
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assign router_chan_in [`router_id(x,y)][EAST] = chan_in_all [EAST_ID];
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assign chan_out_all [EAST_ID] = router_chan_out [`router_id(x,y)][EAST];
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end //topology
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end
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if(y>0) begin : not_first_y
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assign router_chan_in[`router_id(x,y)][NORTH] = router_chan_out [`router_id(x,(y-1))][SOUTH];
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end else begin :first_y
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/* verilator lint_off WIDTH */
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if(TOPOLOGY == "MESH") begin : first_y_mesh
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][NORTH] = {SMARTFLIT_CHANEL_w{1'b0}};
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "TORUS") begin :first_y_torus
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][NORTH] = router_chan_out [`router_id(x,(NY-1))][SOUTH];
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "FMESH") begin : first_y_fmesh //connect to endp
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/* verilator lint_on WIDTH */
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localparam NORTH_ID = NX*NY*NL + x;
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assign router_chan_in [`router_id(x,y)][NORTH] = chan_in_all [NORTH_ID];
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assign chan_out_all [NORTH_ID] = router_chan_out [`router_id(x,y)][NORTH];
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end//topology
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end//y>0
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if(x>0)begin :not_first_x
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assign router_chan_in[`router_id(x,y)][WEST] = router_chan_out [`router_id((x-1),y)][EAST];
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end else begin :first_x
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/* verilator lint_off WIDTH */
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if(TOPOLOGY == "MESH") begin :first_x_mesh
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][WEST] = {SMARTFLIT_CHANEL_w{1'b0}};
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "TORUS") begin :first_x_torus
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][WEST] = router_chan_out [`router_id((NX-1),y)][EAST] ;
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "FMESH") begin : first_x_fmesh //connect to endp
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/* verilator lint_on WIDTH */
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localparam WEST_ID = NX*NY*NL +2*NX + y;
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assign router_chan_in [`router_id(x,y)][WEST] = chan_in_all [WEST_ID];
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assign chan_out_all [WEST_ID] = router_chan_out [`router_id(x,y)][WEST];
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end//topology
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end
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if(y < NY-1) begin : firsty
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assign router_chan_in[`router_id(x,y)][SOUTH] = router_chan_out [`router_id(x,(y+1))][NORTH];
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end else begin : lasty
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/* verilator lint_off WIDTH */
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if(TOPOLOGY == "MESH") begin :ly_mesh
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][SOUTH]= {SMARTFLIT_CHANEL_w{1'b0}};
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/* verilator lint_off WIDTH */
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end else if(TOPOLOGY == "TORUS") begin :ly_torus
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/* verilator lint_on WIDTH */
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assign router_chan_in[`router_id(x,y)][SOUTH]= router_chan_out [`router_id(x,0)][NORTH];
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end else if(TOPOLOGY == "FMESH") begin : ly_fmesh //connect to endp
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/* verilator lint_on WIDTH */
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localparam SOUTH_ID = NX*NY*NL + NX + x;
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assign router_chan_in [`router_id(x,y)][SOUTH] = chan_in_all [SOUTH_ID];
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assign chan_out_all [SOUTH_ID] = router_chan_out [`router_id(x,y)][SOUTH];
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end//topology
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end
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// endpoint(s) connection
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// connect other local ports
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for (l=0; l
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localparam ENDPID = `endp_id(x,y,l);
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localparam LOCALP = (l==0) ? l : l + R2R_CHANELS_MESH_TORI; // first local port is connected to router port 0. The rest are connected at the end
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assign router_chan_in [`router_id(x,y)][LOCALP] = chan_in_all [ENDPID];
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assign chan_out_all [ENDPID] = router_chan_out [`router_id(x,y)][LOCALP];
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end// locals
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end //y
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end //x
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end// mesh_torus
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endgenerate
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endmodule
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