URL
https://opencores.org/ocsvn/an-fpga-implementation-of-low-latency-noc-based-mpsoc/an-fpga-implementation-of-low-latency-noc-based-mpsoc/trunk
`include "pronoc_def.v"
/**********************************************************************
** File: mesh_torus_noc.v
**
** Copyright (C) 2014-2017 Alireza Monemi
**
** This file is part of ProNoC
**
** ProNoC ( stands for Prototype Network-on-chip) is free software:
** you can redistribute it and/or modify it under the terms of the GNU
** Lesser General Public License as published by the Free Software Foundation,
** either version 2 of the License, or (at your option) any later version.
**
** ProNoC is distributed in the hope that it will be useful, but WITHOUT
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
** Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with ProNoC. If not, see
.
**
**
** Description:
** the NoC top module. It generate one of the mesh, torus, ring, or line topologies by
** connecting routers
**
**************************************************************/
`define router_id(x,y) ((y * NX) + x)
`define endp_id(x,y,l) ((y * NX) + x) * NL + l
module mesh_torus_noc_top #(
parameter NOC_ID=0
) (
reset,
clk,
chan_in_all,
chan_out_all,
router_event
);
`NOC_CONF
input clk,reset;
//Endpoints ports
input smartflit_chanel_t chan_in_all [NE-1 : 0];
output smartflit_chanel_t chan_out_all [NE-1 : 0];
//Events
output router_event_t router_event [NR-1 : 0][MAX_P-1 : 0];
//all routers port
smartflit_chanel_t router_chan_in [NR-1 :0][MAX_P-1 : 0];
smartflit_chanel_t router_chan_out [NR-1 :0][MAX_P-1 : 0];
wire [RAw-1 : 0] current_r_addr [NR-1 : 0];
genvar x,y,l;
generate
/* verilator lint_off WIDTH */
if( TOPOLOGY == "RING" || TOPOLOGY == "LINE") begin : ring_line
/* verilator lint_on WIDTH */
for (x=0; x
0)begin :not_first_x
assign router_chan_in[x][BACKWARD]= router_chan_out [(x-1)][FORWARD];
end else begin :first_x
/* verilator lint_off WIDTH */
if(TOPOLOGY == "LINE") begin : line_first_x
/* verilator lint_on WIDTH */
assign router_chan_in[x][BACKWARD]={SMARTFLIT_CHANEL_w{1'b0}};
end else begin : ring_first_x
assign router_chan_in[x][BACKWARD]= router_chan_out [(NX-1)][FORWARD];
end
end
// connect other local ports
for (l=0; l0) begin : not_first_y
assign router_chan_in[`router_id(x,y)][NORTH] = router_chan_out [`router_id(x,(y-1))][SOUTH];
end else begin :first_y
/* verilator lint_off WIDTH */
if(TOPOLOGY == "MESH") begin : first_y_mesh
/* verilator lint_on WIDTH */
assign router_chan_in[`router_id(x,y)][NORTH] = {SMARTFLIT_CHANEL_w{1'b0}};
/* verilator lint_off WIDTH */
end else if(TOPOLOGY == "TORUS") begin :first_y_torus
/* verilator lint_on WIDTH */
assign router_chan_in[`router_id(x,y)][NORTH] = router_chan_out [`router_id(x,(NY-1))][SOUTH];
/* verilator lint_off WIDTH */
end else if(TOPOLOGY == "FMESH") begin : first_y_fmesh //connect to endp
/* verilator lint_on WIDTH */
localparam NORTH_ID = NX*NY*NL + x;
assign router_chan_in [`router_id(x,y)][NORTH] = chan_in_all [NORTH_ID];
assign chan_out_all [NORTH_ID] = router_chan_out [`router_id(x,y)][NORTH];
end//topology
end//y>0
if(x>0)begin :not_first_x
assign router_chan_in[`router_id(x,y)][WEST] = router_chan_out [`router_id((x-1),y)][EAST];
end else begin :first_x
/* verilator lint_off WIDTH */
if(TOPOLOGY == "MESH") begin :first_x_mesh
/* verilator lint_on WIDTH */
assign router_chan_in[`router_id(x,y)][WEST] = {SMARTFLIT_CHANEL_w{1'b0}};
/* verilator lint_off WIDTH */
end else if(TOPOLOGY == "TORUS") begin :first_x_torus
/* verilator lint_on WIDTH */
assign router_chan_in[`router_id(x,y)][WEST] = router_chan_out [`router_id((NX-1),y)][EAST] ;
/* verilator lint_off WIDTH */
end else if(TOPOLOGY == "FMESH") begin : first_x_fmesh //connect to endp
/* verilator lint_on WIDTH */
localparam WEST_ID = NX*NY*NL +2*NX + y;
assign router_chan_in [`router_id(x,y)][WEST] = chan_in_all [WEST_ID];
assign chan_out_all [WEST_ID] = router_chan_out [`router_id(x,y)][WEST];
end//topology
end
if(y < NY-1) begin : firsty
assign router_chan_in[`router_id(x,y)][SOUTH] = router_chan_out [`router_id(x,(y+1))][NORTH];
end else begin : lasty
/* verilator lint_off WIDTH */
if(TOPOLOGY == "MESH") begin :ly_mesh
/* verilator lint_on WIDTH */
assign router_chan_in[`router_id(x,y)][SOUTH]= {SMARTFLIT_CHANEL_w{1'b0}};
/* verilator lint_off WIDTH */
end else if(TOPOLOGY == "TORUS") begin :ly_torus
/* verilator lint_on WIDTH */
assign router_chan_in[`router_id(x,y)][SOUTH]= router_chan_out [`router_id(x,0)][NORTH];
end else if(TOPOLOGY == "FMESH") begin : ly_fmesh //connect to endp
/* verilator lint_on WIDTH */
localparam SOUTH_ID = NX*NY*NL + NX + x;
assign router_chan_in [`router_id(x,y)][SOUTH] = chan_in_all [SOUTH_ID];
assign chan_out_all [SOUTH_ID] = router_chan_out [`router_id(x,y)][SOUTH];
end//topology
end
// endpoint(s) connection
// connect other local ports
for (l=0; l
