Subversion Repositories an-fpga-implementation-of-low-latency-noc-based-mpsoc

`include "pronoc_def.v"

/**********************************************************************

**      File: comb-nonspec.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:

**      VC allocator combined with non-speculative switch

**      allocator where the free VC availability is checked at

**      the beginning of switch allocation (comb-nonspec).

**

***********************************************************************/

module comb_nonspec_allocator # (

    parameter NOC_ID = 0,

    parameter P = 5 //port number

)(

    //VC allocator

    //input

    dest_port_all,         // from input port

    masked_ovc_request_all,

    pck_is_single_flit_all,

    //output

    ovc_allocated_all,//to the output port

    granted_ovc_num_all, // to the input port

    ivc_num_getting_ovc_grant,

    //switch_alloc

    ivc_info,

    vc_weight_is_consumed_all,

    iport_weight_is_consumed_all,

    //output

    granted_dest_port_all,

    ivc_num_getting_sw_grant,

    nonspec_first_arbiter_granted_ivc_all,

    any_ivc_sw_request_granted_all,

    any_ovc_granted_in_outport_all,

    granted_dst_is_from_a_single_flit_pck,

    // global

    clk,

    reset

);

        `NOC_CONF

    localparam

        P_1 = (SELF_LOOP_EN == "NO")? P-1 : P,

        PV = V * P,

        VV = V * V,

        VP_1 = V * P_1,

        PP_1 = P_1 * P,

        PVV = PV * V,

        PVP_1 = PV * P_1;

    input  ivc_info_t ivc_info [P-1 : 0][V-1 : 0];

    input  [PVV-1 : 0] masked_ovc_request_all;

    input  [PVP_1-1 : 0] dest_port_all;

    input  [PV-1 : 0] pck_is_single_flit_all;

    output [PV-1 : 0] ovc_allocated_all;

    output [PVV-1 : 0] granted_ovc_num_all;

    output [PV-1 : 0] ivc_num_getting_ovc_grant;

    output [PP_1-1 : 0] granted_dest_port_all;

    output [PV-1 : 0] ivc_num_getting_sw_grant;

    output [P-1 : 0] any_ivc_sw_request_granted_all;

    output [P-1 : 0] any_ovc_granted_in_outport_all;

    output [PV-1 : 0] nonspec_first_arbiter_granted_ivc_all;

    input  clk,reset;

    input  [PV-1 : 0] vc_weight_is_consumed_all;

    input  [P-1 : 0] iport_weight_is_consumed_all;

    output [P-1 : 0] granted_dst_is_from_a_single_flit_pck;

    //internal wires switch allocator

    wire  [PV-1 : 0] first_arbiter_granted_ivc_all;

    wire  [PV-1 : 0] ivc_request_masked_all;

    wire  [P-1 : 0] any_cand_ovc_exsit;

    wire  [PV-1 : 0] ivc_request_all;

    wire  [PV-1 : 0] ovc_is_assigned_all;

    wire  [PV-1 : 0] assigned_ovc_not_full_all;

    assign nonspec_first_arbiter_granted_ivc_all = first_arbiter_granted_ivc_all;

    //nonspeculative switch allocator

    nonspec_sw_alloc #(

        .V(V),

        .P(P),

        .FIRST_ARBITER_EXT_P_EN(FIRST_ARBITER_EXT_P_EN),

        .SWA_ARBITER_TYPE (SWA_ARBITER_TYPE),

        .MIN_PCK_SIZE(MIN_PCK_SIZE),

        .SELF_LOOP_EN(SELF_LOOP_EN)

    )

    nonspeculative_sw_allocator

    (

        .ivc_granted_all (ivc_num_getting_sw_grant),

        .ivc_request_masked_all (ivc_request_masked_all),

        .pck_is_single_flit_all(pck_is_single_flit_all),

        .granted_dst_is_from_a_single_flit_pck(granted_dst_is_from_a_single_flit_pck),

        .dest_port_all (dest_port_all),

        .granted_dest_port_all (granted_dest_port_all),

        .first_arbiter_granted_ivc_all (first_arbiter_granted_ivc_all),

        .any_ivc_granted_all (any_ivc_sw_request_granted_all),

        .any_ovc_granted_all (any_ovc_granted_in_outport_all),

        .vc_weight_is_consumed_all(vc_weight_is_consumed_all),

        .iport_weight_is_consumed_all(iport_weight_is_consumed_all),

        .clk (clk),

        .reset (reset)

    );

    wire   [PVV-1 : 0] masked_ovc_request_all;

    wire   [V-1 : 0] masked_non_assigned_request    [PV-1 : 0] ;

    wire   [PV-1 : 0] masked_assigned_request;

    wire   [PV-1 : 0] assigned_ovc_request_all ;

    wire   [VV-1 : 0] masked_candidate_ovc_per_port    [P-1 : 0] ;

    wire   [V-1 : 0] first_arbiter_granted_ivc_per_port[P-1 : 0] ;

    wire   [V-1 : 0] candidate_ovc_local_num   [P-1 : 0] ;

    wire   [V-1 : 0] first_arbiter_ovc_granted        [PV-1 : 0];

    wire   [P_1-1 : 0] granted_dest_port_per_port        [P-1 : 0];

    wire   [VP_1-1 : 0] cand_ovc_granted           [P-1 : 0];

    wire   [P_1-1 : 0] ovc_allocated_all_gen   [PV-1 : 0];

    wire   [V-1 : 0] granted_ovc_local_num_per_port     [P-1 : 0];

    wire   [V-1 : 0] ivc_local_num_getting_ovc_grant[P-1 : 0];

    wire   [V : 0] summ_in [PV-1 : 0];

    wire   [V-1 : 0]  vc_pririty [PV-1 : 0] ;

    assign assigned_ovc_request_all =   ivc_request_all &   ovc_is_assigned_all;

    genvar i,j;

    generate

    // IVC loop

    for(i=0;i< PV;i=i+1) begin :total_vc_loop

        // mask unavailable ovc from requests

        assign masked_non_assigned_request    [i]  =    masked_ovc_request_all [(i+1)*V-1 : i*V ];

        assign masked_assigned_request        [i]  =    assigned_ovc_not_full_all [i] & assigned_ovc_request_all [i];

        // summing assigned and non-assigned VC requests

        assign summ_in[i] ={masked_non_assigned_request    [i],masked_assigned_request        [i]};

        assign ivc_request_masked_all[i] = | summ_in[i];

        //first level arbiter to candidate only one OVC

        //if(VC_ARBITER_TYPE=="RRA")begin :round_robin

            arbiter #(

                .ARBITER_WIDTH(V)

              )

              ovc_arbiter

              (

                .clk        (clk),

                .reset        (reset),

                .request    (masked_non_assigned_request    [i]),

                .grant        (first_arbiter_ovc_granted[i]),

                .any_grant    ()

              );

       /*

        end  else begin :fixarb

            vc_priority_based_dest_port#(

                .P(P),

                .V(V)

             )

             priority_setting

             (

                .dest_port(lk_destination_all [((i+1)*P_1)-1 : i*P_1]),

                .vc_pririty(vc_pririty[i])

             );

            arbiter_ext_priority #(

              .ARBITER_WIDTH (V)

            )

            ovc_arbiter

            (

                 .request (masked_non_assigned_request    [i]),

                 .priority_in(vc_pririty[i]),

                 .grant(first_arbiter_ovc_granted[i]),

                 .any_grant()

              );

         end

       */

    end//for

    wire [P-1 : 0] ovc_assigned_local;

    for(i=0;i< P;i=i+1) begin :port_loop3

            for(j=0;j< V;j=j+1) begin :vc_loop

                //merge masked_candidate_ovc in each port

                assign ivc_request_all[i*V+j] = ivc_info[i][j].ivc_req;

                assign ovc_is_assigned_all[i*V+j] = ivc_info[i][j].ovc_is_assigned;

                assign assigned_ovc_not_full_all[i*V+j] =ivc_info[i][j].assigned_ovc_not_full;

                assign masked_candidate_ovc_per_port[i][(j+1)*V-1 : j*V] =    first_arbiter_ovc_granted    [i*V+j];

            end//for j

            assign first_arbiter_granted_ivc_per_port[i]=first_arbiter_granted_ivc_all[(i+1)*V-1 : i*V];

            assign granted_dest_port_per_port[i]=granted_dest_port_all[(i+1)*P_1-1 : i*P_1];

        // multiplex candidate OVC of first level switch allocatore winner

        onehot_mux_1D #(

            .W (V),

            .N (V)

        )

        multiplexer2

        (

                .in            (masked_candidate_ovc_per_port    [i]),

                .out            (candidate_ovc_local_num    [i]),

            .sel                (first_arbiter_granted_ivc_per_port        [i])

        );

        onehot_mux_1D #(

                        .W (1),

                        .N (V)

                )

                multiplexer2_1

                (

                        .in  (ovc_is_assigned_all[(i+1)*V-1 : i*V]),

                        .out (ovc_assigned_local[i]),

                        .sel (first_arbiter_granted_ivc_per_port [i])

                );

     //   assign any_cand_ovc_exsit[i] = | candidate_ovc_local_num    [i];

        //demultiplexer

        one_hot_demux #(

            .IN_WIDTH(V),

            .SEL_WIDTH(P_1)

        )

        demux1

        (

            .demux_sel(granted_dest_port_per_port [i]),//selectore

            .demux_in(candidate_ovc_local_num[i]),//repeated

            .demux_out(cand_ovc_granted [i])

        );

        assign granted_ovc_local_num_per_port    [i]=(any_ivc_sw_request_granted_all[i] )?  candidate_ovc_local_num[i] : {V{1'b0}};

        assign ivc_local_num_getting_ovc_grant    [i]= (any_ivc_sw_request_granted_all[i] & ~ovc_assigned_local[i])?     first_arbiter_granted_ivc_per_port [i] : {V{1'b0}};

        assign ivc_num_getting_ovc_grant   [(i+1)*V-1 : i*V] = ivc_local_num_getting_ovc_grant[i];

        for(j=0;j

            assign granted_ovc_num_all[(i*VV)+((j+1)*V)-1 : (i*VV)+(j*V)]=granted_ovc_local_num_per_port[i];

        end//j

    end//i

    for(i=0;i< PV;i=i+1) begin :total_vc_loop2

        for(j=0;j

            if(SELF_LOOP_EN == "NO") begin :nslp

                if((i/V)

                    assign ovc_allocated_all_gen[i][j-1] = cand_ovc_granted[j][i];

                end else if((i/V)>j) begin: hh

                    assign ovc_allocated_all_gen[i][j] = cand_ovc_granted[j][i-V];

                end

            end else begin : slp

                 assign ovc_allocated_all_gen[i][j] = cand_ovc_granted[j][i];

            end

        end//j

        assign ovc_allocated_all [i] = |ovc_allocated_all_gen[i];

    end//i

    endgenerate

endmodule

/**************************************************************

*

*             comb_nonspec_v2

*

* first arbiter has been shifted after first multiplexer

*

*

*********************************************************/

module  comb_nonspec_v2_allocator #(

    parameter V = 4,

    parameter P = 5,

    parameter FIRST_ARBITER_EXT_P_EN = 1,

    parameter SWA_ARBITER_TYPE = "WRRA",

    parameter MIN_PCK_SIZE=2, //minimum packet size in flits. The minimum value is 1.

    parameter SELF_LOOP_EN= "NO"

)(

    //VC allocator

    //input

    dest_port_all,      // from input port

    ovc_is_assigned_all,    //

    masked_ovc_request_all,

    pck_is_single_flit_all,

    //output

    ovc_allocated_all,//to the output port

    granted_ovc_num_all, // to the input port

    ivc_num_getting_ovc_grant,

    //switch_alloc

    ivc_request_all,

    assigned_ovc_not_full_all,

    vc_weight_is_consumed_all,

    iport_weight_is_consumed_all,

    //output

    granted_dest_port_all,

    ivc_num_getting_sw_grant,

    nonspec_first_arbiter_granted_ivc_all,

    any_ivc_sw_request_granted_all,

    any_ovc_granted_in_outport_all,

    granted_dst_is_from_a_single_flit_pck,

    // global

    clk,

    reset

);

    localparam

        P_1 = (SELF_LOOP_EN == "NO") ?  P-1 :P,

        PV = V * P,

        VV = V * V,

        VP_1 = V * P_1,

        PP_1 = P_1 * P,

        PVV = PV * V,

        PVP_1 = PV * P_1;

    input   [PVV-1 : 0] masked_ovc_request_all;

    input   [PVP_1-1 : 0] dest_port_all;

    input   [PV-1 : 0] ovc_is_assigned_all;

    input  [PV-1 : 0] pck_is_single_flit_all;

    output  [PV-1 : 0] ovc_allocated_all;

    output  [PVV-1 : 0] granted_ovc_num_all;

    output  [PV-1 : 0] ivc_num_getting_ovc_grant;

    input   [PV-1 : 0] ivc_request_all;

    input   [PV-1 : 0] assigned_ovc_not_full_all;

    output  [PP_1-1 : 0] granted_dest_port_all;

    output  [PV-1 : 0] ivc_num_getting_sw_grant;

    output  [P-1 : 0] any_ivc_sw_request_granted_all;

    output  [P-1 : 0] any_ovc_granted_in_outport_all;

    output  [PV-1 : 0] nonspec_first_arbiter_granted_ivc_all;

    input   clk,reset;

    input   [PV-1 : 0] vc_weight_is_consumed_all;

    input   [P-1 : 0] iport_weight_is_consumed_all;

    //internal wires switch allocator

    wire    [PV-1 : 0] first_arbiter_granted_ivc_all;

    wire    [PV-1 : 0] ivc_request_masked_all;

    wire    [P-1 : 0] any_cand_ovc_exsit;

    output  [P-1 : 0] granted_dst_is_from_a_single_flit_pck;

    assign nonspec_first_arbiter_granted_ivc_all = first_arbiter_granted_ivc_all;

    //nonspeculative switch allocator

    nonspec_sw_alloc #(

        .V(V),

        .P(P),

        .FIRST_ARBITER_EXT_P_EN(FIRST_ARBITER_EXT_P_EN),

        .SWA_ARBITER_TYPE(SWA_ARBITER_TYPE),

        .MIN_PCK_SIZE(MIN_PCK_SIZE)

    )

    nonspeculative_sw_allocator

    (

        .ivc_granted_all (ivc_num_getting_sw_grant),

        .ivc_request_masked_all (ivc_request_masked_all),

        .pck_is_single_flit_all(pck_is_single_flit_all),

        .granted_dst_is_from_a_single_flit_pck(granted_dst_is_from_a_single_flit_pck),

        .dest_port_all  (dest_port_all),

        .granted_dest_port_all (granted_dest_port_all),

        .first_arbiter_granted_ivc_all (first_arbiter_granted_ivc_all),

        //.first_arbiter_granted_port_all   (first_arbiter_granted_port_all),

        .any_ivc_granted_all (any_ivc_sw_request_granted_all),

        .any_ovc_granted_all (any_ovc_granted_in_outport_all),

        .vc_weight_is_consumed_all(vc_weight_is_consumed_all),

        .iport_weight_is_consumed_all(iport_weight_is_consumed_all),

        .clk  (clk),

        .reset (reset)

    );

    wire    [V-1 : 0] masked_non_assigned_request [PV-1 : 0] ;

    wire    [PV-1 : 0] masked_assigned_request;

    wire    [PV-1 : 0] assigned_ovc_request_all;

    wire    [VV-1 : 0] masked_non_assigned_request_per_port [P-1 : 0] ;

    wire    [V-1 : 0] first_arbiter_granted_ivc_per_port[P-1 : 0] ;

    wire    [V-1 : 0] candidate_ovc_local_num     [P-1 : 0] ;

    wire    [V-1 : 0] first_arbiter_ovc_granted [P-1:0];

    wire    [P_1-1 : 0] granted_dest_port_per_port  [P-1 : 0];

    wire    [VP_1-1 : 0] cand_ovc_granted    [P-1 : 0];

    wire    [P_1-1 : 0] ovc_allocated_all_gen   [PV-1 : 0];

    wire    [V-1 : 0] granted_ovc_local_num_per_port [P-1 : 0];

    wire    [V-1 : 0] ivc_local_num_getting_ovc_grant[P-1 : 0];

    wire    [V : 0] summ_in   [PV-1 : 0];

    assign assigned_ovc_request_all        =   ivc_request_all &   ovc_is_assigned_all;

    genvar i,j;

    generate

    // IVC loop

    for(i=0;i< PV;i=i+1) begin :total_vc_loop

        // mask unavailable ovc from requests

        assign masked_non_assigned_request  [i]  =   masked_ovc_request_all [(i+1)*V-1 : i*V ];

        assign masked_assigned_request      [i]  =   assigned_ovc_not_full_all[i] & assigned_ovc_request_all[i];

        // summing assigned and non-assigned VC requests

        assign summ_in[i]  ={masked_non_assigned_request   [i],masked_assigned_request     [i]};

        assign ivc_request_masked_all[i] = | summ_in[i];

    end//for

    for(i=0;i< P;i=i+1) begin :port_loop3

            for(j=0;j< V;j=j+1) begin :vc_loop

                //merge masked_candidate_ovc in each port

                assign masked_non_assigned_request_per_port[i][(j+1)*V-1 : j*V] =           masked_non_assigned_request [i*V+j];

            end//for j

            assign first_arbiter_granted_ivc_per_port[i]=first_arbiter_granted_ivc_all[(i+1)*V-1 : i*V];

            assign granted_dest_port_per_port[i]=granted_dest_port_all[(i+1)*P_1-1 : i*P_1];

        onehot_mux_1D #(

            .W  (V),

            .N  (V)

        )

        multiplexer2

        (

            .in          (masked_non_assigned_request_per_port   [i]),

            .out         (candidate_ovc_local_num    [i]),

            .sel         (first_arbiter_granted_ivc_per_port     [i])

        );

        assign any_cand_ovc_exsit[i] = | candidate_ovc_local_num    [i];

        //first level arbiter to candidate only one OVC

        arbiter #(

            .ARBITER_WIDTH (V)

        )

        first_arbiter

        (

            .clk (clk),

            .reset (reset),

            .request (candidate_ovc_local_num[i]),

            .grant (first_arbiter_ovc_granted[i]),

            .any_grant ( )

        );

        //demultiplexer

        one_hot_demux   #(

            .IN_WIDTH (V),

            .SEL_WIDTH (P_1)

        )

        demux1

        (

            .demux_sel (granted_dest_port_per_port [i]),//selectore

            .demux_in (first_arbiter_ovc_granted[i]),//repeated

            .demux_out (cand_ovc_granted [i])

        );

        assign granted_ovc_local_num_per_port   [i]=(any_ivc_sw_request_granted_all[i] )?  first_arbiter_ovc_granted[i] : {V{1'b0}};

        assign ivc_local_num_getting_ovc_grant  [i]= (any_ivc_sw_request_granted_all[i] & any_cand_ovc_exsit[i])?   first_arbiter_granted_ivc_per_port [i] : {V{1'b0}};

        assign ivc_num_getting_ovc_grant   [(i+1)*V-1 : i*V] = ivc_local_num_getting_ovc_grant[i];

        for(j=0;j

            assign granted_ovc_num_all[(i*VV)+((j+1)*V)-1 : (i*VV)+(j*V)]=granted_ovc_local_num_per_port[i];

        end//j

    end//i

    for(i=0;i< PV;i=i+1) begin :total_vc_loop2

        for(j=0;j

            if((i/V)

                assign ovc_allocated_all_gen[i][j-1] = cand_ovc_granted[j][i];

            end else if((i/V)>j) begin: hh

                assign ovc_allocated_all_gen[i][j] = cand_ovc_granted[j][i-V];

            end

        end//j

        assign ovc_allocated_all [i] = |ovc_allocated_all_gen[i];

    end//i

    endgenerate

endmodule

/********************************************

*

*    nonspeculative switch allocator

*

******************************************/

module nonspec_sw_alloc #(

    parameter V = 4,

    parameter P = 5,

    parameter FIRST_ARBITER_EXT_P_EN = 1,

    parameter SWA_ARBITER_TYPE = "WRRA",

    parameter MIN_PCK_SIZE=2, //minimum packet size in flits. The minimum value is 1.

    parameter SELF_LOOP_EN="NO"

)(

    ivc_granted_all,

    ivc_request_masked_all,

    pck_is_single_flit_all,

    granted_dst_is_from_a_single_flit_pck,

    dest_port_all,

    granted_dest_port_all,

    first_arbiter_granted_ivc_all,

    //first_arbiter_granted_port_all,

    any_ivc_granted_all,

    any_ovc_granted_all,

    vc_weight_is_consumed_all,

    iport_weight_is_consumed_all,

    clk,

    reset

);

   localparam

        P_1 = (SELF_LOOP_EN== "NO") ? P-1 : P,

        PV = V * P,

        VP_1 = V * P_1,

        PP_1 = P_1 * P,

        PVP_1 = PV * P_1,

        PP = P*P;

    output [PV-1 : 0] ivc_granted_all;

    output [P-1 : 0] granted_dst_is_from_a_single_flit_pck;

    input  [PV-1 : 0] ivc_request_masked_all;

    input  [PV-1 : 0] pck_is_single_flit_all;

    input  [PVP_1-1 : 0] dest_port_all;

    output [PP_1-1 : 0] granted_dest_port_all;

    output [PV-1 : 0] first_arbiter_granted_ivc_all;

    //output [PP_1-1 : 0] first_arbiter_granted_port_all;

    output [P-1 : 0] any_ivc_granted_all; //any ivc is granted in input  port [i]

    output [P-1 : 0] any_ovc_granted_all; //any ovc is granted in output port [i]

    input  clk, reset;

    input [PV-1 : 0] vc_weight_is_consumed_all;

    input [P-1: 0] iport_weight_is_consumed_all;

    //separte input per port

    wire [V-1 : 0] ivc_granted        [P-1 : 0];

    wire [V-1 : 0] pck_is_single_flit [P-1 : 0];

    wire [VP_1-1 : 0] dest_port_ivc       [P-1 : 0];

    wire [P_1-1 : 0] granted_dest_port  [P-1 : 0];

    wire [P_1-1 : 0] single_flit_granted_dst [P-1 : 0];

    wire [PP-1 : 0] single_flit_granted_dst_all;

    // internal wires

    wire    [V-1 : 0] ivc_masked     [P-1 : 0];//output of mask and

    wire    [V-1 : 0] first_arbiter_grant     [P-1 : 0];//output of first arbiter

    wire    [P-1 : 0] single_flit_pck_local_grant;

    wire    [P_1-1 : 0] dest_port      [P-1 : 0];//output of multiplexer

    wire    [P_1-1 : 0] second_arbiter_request  [P-1 : 0];

    wire    [P_1-1 : 0] second_arbiter_grant    [P-1 : 0];

    wire    [P_1-1 : 0] second_arbiter_weight_consumed [P-1 : 0];

    wire    [V-1 : 0] vc_weight_is_consumed [P-1 : 0];

    wire    [P-1    :0] winner_weight_consumed;

    genvar i,j;

    generate

    for(i=0;i< P;i=i+1) begin :port_loop

        //assign in/out to the port based wires

        //output

        assign ivc_granted_all [(i+1)*V-1 : i*V] =   ivc_granted [i];

        assign granted_dest_port_all    [(i+1)*P_1-1 : i*P_1]   =   granted_dest_port[i];

        assign first_arbiter_granted_ivc_all[(i+1)*V-1 : i*V]=           first_arbiter_grant[i];

        //input

        assign ivc_masked[i]  = ivc_request_masked_all [(i+1)*V-1 : i*V];

        assign dest_port_ivc[i]  = dest_port_all [(i+1)*VP_1-1 : i*VP_1];

        assign vc_weight_is_consumed[i]  =  vc_weight_is_consumed_all [(i+1)*V-1 : i*V];

        //first level arbiter

        swa_input_port_arbiter #(

                .ARBITER_WIDTH(V),

                .EXT_P_EN(FIRST_ARBITER_EXT_P_EN),

                .ARBITER_TYPE(SWA_ARBITER_TYPE)

        )

        input_arbiter

        (

                .ext_pr_en_i(any_ivc_granted_all[i]),

                .request(ivc_masked [i]),

                .grant(first_arbiter_grant[i]),

                .any_grant( ),

                .clk(clk),

                .reset(reset),

                .vc_weight_is_consumed(vc_weight_is_consumed[i]),

                .winner_weight_consumed(winner_weight_consumed[i])

        );

        //destination port multiplexer

        onehot_mux_1D #(

            .W (P_1),

            .N (V)

        )

        multiplexer

        (

            .in (dest_port_ivc  [i]),

            .out (dest_port      [i]),

            .sel(first_arbiter_grant[i])

        );

        if(MIN_PCK_SIZE == 1) begin :single_flit_supported

            //single_flit req multiplexer

            assign pck_is_single_flit[i] = pck_is_single_flit_all [(i+1)*V-1 : i*V];

            onehot_mux_1D #(

                .W (1),

                .N (V)

            )

            multiplexer2

            (

                .in (pck_is_single_flit  [i]),

                .out (single_flit_pck_local_grant[i]),

                .sel (first_arbiter_grant[i])

            );

            assign  single_flit_granted_dst[i] = (single_flit_pck_local_grant[i])?  granted_dest_port[i] : {P_1{1'b0}};

            if (SELF_LOOP_EN == "NO") begin :nslp

                add_sw_loc_one_hot #(

                    .P(P),

                    .SW_LOC(i)

                )

                add_sw_loc

                (

                    .destport_in(single_flit_granted_dst[i]),

                    .destport_out(single_flit_granted_dst_all[(i+1)*P-1 : i*P])

                );

            end else begin :slp

                assign single_flit_granted_dst_all[(i+1)*P-1 : i*P] = single_flit_granted_dst[i];

            end

        end else begin : single_flit_notsupported

            assign single_flit_pck_local_grant[i] = 1'bx;

            assign single_flit_granted_dst[i] = {P_1{1'bx}};

            assign single_flit_granted_dst_all[(i+1)*P-1 : i*P]={P{1'b0}};

        end

    //second arbiter input/output generate

    for(j=0;j

         if (SELF_LOOP_EN == "NO") begin :nslp

            if(i

                assign second_arbiter_request[i][j-1]  = dest_port[j][i];

                //assign second_arbiter_weight_consumed[i][j-1]  =winner_weight_consumed[j] ;

                assign second_arbiter_weight_consumed[i][j-1]  =iport_weight_is_consumed_all[j] ;

                assign granted_dest_port[j][i] = second_arbiter_grant  [i][j-1] ;

            end else if(i>j)begin: hh

                assign second_arbiter_request[i][j] = dest_port [j][i-1] ;

                //assign second_arbiter_weight_consumed[i][j]  =winner_weight_consumed[j];

                assign second_arbiter_weight_consumed[i][j]  =iport_weight_is_consumed_all[j];

                assign granted_dest_port[j][i-1] = second_arbiter_grant  [i][j] ;

            end

            //if(i==j) wires are left disconnected

        end else begin :slp

            assign second_arbiter_request[i][j]  = dest_port[j][i];

            assign second_arbiter_weight_consumed[i][j]  =iport_weight_is_consumed_all[j] ;

            assign granted_dest_port[j][i] = second_arbiter_grant  [i][j] ;

        end

    end

        //second level arbiter

        swa_output_port_arbiter #(

            .ARBITER_WIDTH(P_1),

            .ARBITER_TYPE(SWA_ARBITER_TYPE) // RRA, WRRA

        )

        output_arbiter

        (

           .weight_consumed(second_arbiter_weight_consumed[i]),  // only used for WRRA

           .clk(clk),

           .reset(reset),

           .request(second_arbiter_request [i]),

           .grant(second_arbiter_grant [i]),

           .any_grant(any_ovc_granted_all [i])

        );

        //any ivc

        assign  any_ivc_granted_all[i] = | granted_dest_port[i];

        assign  ivc_granted[i] =  (any_ivc_granted_all[i]) ? first_arbiter_grant[i] : {V{1'b0}};

    end//for

    endgenerate

          custom_or #(

            .IN_NUM(P),

            .OUT_WIDTH(P)

         )

         or_dst

         (

            .or_in(single_flit_granted_dst_all),

            .or_out(granted_dst_is_from_a_single_flit_pck)

        );

endmodule

/*******************

*    swa_input_port_arbiter

*

********************/

module swa_input_port_arbiter #(

    parameter ARBITER_WIDTH =4,

    parameter EXT_P_EN = 1,

    parameter ARBITER_TYPE = "WRRA"// RRA, WRRA

)(

   ext_pr_en_i,  // it is used only if the EXT_P_EN is 1

   clk,

   reset,

   request,

   grant,

   any_grant,

   vc_weight_is_consumed, // only for WRRA

   winner_weight_consumed // only for WRRA

);

    input ext_pr_en_i;

    input [ARBITER_WIDTH-1 : 0] request;

    output[ARBITER_WIDTH-1 : 0] grant;

    output any_grant;

    input  clk;

    input  reset;

    input  [ARBITER_WIDTH-1 : 0] vc_weight_is_consumed;

    output winner_weight_consumed;

    generate

    /* verilator lint_off WIDTH */

    if(ARBITER_TYPE != "RRA") begin : wrra_m

    /* verilator lint_on WIDTH */

        // one hot mux

        onehot_mux_1D #(

            .W(1),

            .N(ARBITER_WIDTH)

        )

        mux

        (

            .in(vc_weight_is_consumed),

            .out(winner_weight_consumed),

            .sel(grant)

        );

        wire priority_en = (EXT_P_EN == 1) ? ext_pr_en_i & winner_weight_consumed : winner_weight_consumed;

        //round robin arbiter with external priority

        arbiter_priority_en #(

            .ARBITER_WIDTH(ARBITER_WIDTH)

        )

        rra

        (

            .request(request),

            .grant(grant),

            .any_grant(any_grant),

            .clk(clk),

            .reset(reset),

            .priority_en(priority_en)

        );

    end else begin : rra_m //RRA

        assign winner_weight_consumed = 1'bx;

        if(EXT_P_EN==1) begin : arbiter_ext_en

            arbiter_priority_en #(

                .ARBITER_WIDTH (ARBITER_WIDTH)

            )

            arb

            (

                .clk (clk),

                .reset (reset),

                .request (request),

                .grant (grant),

                .any_grant (any_grant ),

                .priority_en (ext_pr_en_i)

            );

        end else  begin: first_lvl_arbiter_internal_en

            arbiter #(

                .ARBITER_WIDTH (ARBITER_WIDTH)

            )

            arb

            (

                .clk (clk),

                .reset (reset),

                .request (request),

                .grant (grant),

                .any_grant (any_grant )

            );

        end//else

    end

    endgenerate

endmodule

/*******************

*    swa_output_port_arbiter

*

********************/

module swa_output_port_arbiter #(

    parameter ARBITER_WIDTH =4,

    parameter ARBITER_TYPE = "WRRA" // RRA, WRRA

)(

   weight_consumed,  // only used for WRRA

   clk,

   reset,

   request,

   grant,

   any_grant

);

    input     [ARBITER_WIDTH-1  :    0]    request;

    output    [ARBITER_WIDTH-1  :    0]    grant;

    output                                 any_grant;

    input                                  clk;

    input                                  reset;

    input    [ARBITER_WIDTH-1  :    0]     weight_consumed;

 generate

    /* verilator lint_off WIDTH */

    if(ARBITER_TYPE == "WRRA") begin : wrra_mine

    /* verilator lint_on WIDTH */

        // second level wrra priority is only changed if the granted request weight is consumed

        wire pr_en;

        onehot_mux_1D #(

            .W(1),

            .N(ARBITER_WIDTH)

        )

        multiplexer

        (

            .in(weight_consumed),

            .out(pr_en),

            .sel(grant)

        );

        arbiter_priority_en #(

            .ARBITER_WIDTH (ARBITER_WIDTH)

        )